CN100427156C - Disposable syringe - Google Patents
Disposable syringe Download PDFInfo
- Publication number
- CN100427156C CN100427156C CNB031380514A CN03138051A CN100427156C CN 100427156 C CN100427156 C CN 100427156C CN B031380514 A CNB031380514 A CN B031380514A CN 03138051 A CN03138051 A CN 03138051A CN 100427156 C CN100427156 C CN 100427156C
- Authority
- CN
- China
- Prior art keywords
- section
- needle
- push rod
- main body
- bolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention relates to a disposable syringe which comprises a syringe body, a needle group, a push rod, an arrow head bolt, a compression spring accommodated in the push rod and a stop block, wherein the syringe body has a tube wall with a small hole diameter section and a large hole diameter section, and the tube wall is provided with an outlet end, an inlet end, an annular groove and a shoulder part; the needle group comprises a needle stand and a needle body, the needle stand is clamped in the annular groove of the syringe body, one end of the needle body is connected with the needle stand, and the other end of the needle body threads out of the body. In this way, when the push rod is combined by the arrow head bolt and the needle group, the clamping state between the needle group and the syringe body and the stopping function of the stop block can be unlocked, and the clamping state between the compression spring and the push rod is synchronous unlocked by means of the displacement of the arrow head bolt so that the arrow head bolt causes the needle group to be pumped back and to be contained in the push rod by means of the recovery elastic force of the compression spring.
Description
[technical field]
The present invention relates to a kind of deserted syringe, particularly relate to a kind of deserted syringe that can take in hiding needle body.
[background technology]
Consulting Fig. 1, is example with No. 5211628 case of United States Patent (USP), consists predominantly of syringe 11, a positioning seat 12, a needle stand 13, a needle body 14, a push rod 15, an arrow shaft 16 of a hollow, and a spring 17 that is compressive state.
This syringe 11 has a blind end 111, the pin hole 112 that reaches consistent Chuanfeng's closed end 111 and extend along an axis X.
This positioning seat 12 is compeled solid in syringe 11 and be resisted against on the blind end 111, but and has a baffle ring 121 of opening, shrinking around this axis X and bullet.
This needle stand 13 runs through positioning seat 12 along this axis X, and has a clamping hole 131 that runs through along this axis X, and one extend and be formed with the projection 133 of an annular space 132 with baffle ring 121 along axis X, and this annular space 132 can be opened for baffle ring 121 bullets, makes needle stand 13 be subject to baffle ring 121 and obtain the location.
This needle body 14 is connected with needle stand 13, and passes syringe 11 by pin hole 112.
This push rod 15 can be made limited propelling movement stroke in syringe 11, and has a urgent clamp ring 151 around axis X.Should compel clamp ring 151 and be formed with the gradient of contiguous axis X gradually.This arrow shaft 16 has that an arrow seat 161, that fixes with urgent clamp ring 151 forms at one end and towards the arrow 162 of needle stand 13, and one is in reverse to arrow 162 and is formed on the baffle plate 163 of the other end.
This compression spring 17 has folder bundle push rod 15 and compels an end 171 of clamp ring 151, and is resisted against the other end 172 of baffle plate 163.This compression spring 17 is located with the fixing effect acquisition that push rod 15 is compeled clamp ring 151 by the arrow seat 161 of arrow shaft 16.
Consult Fig. 2, whereby, after this push rod 15 slides onto and pushes the stroke end and finish the injection purposes, can utilize arrow seat 161 compression baffle rings 121 to break away from the annular space 132 of needle stand 13, the arrow 162 that reaches with arrow shaft 16 engages with the clamping hole 131 of needle stand 13, makes needle stand 13 and arrow shaft 16 fixed formation interlocks.And wish that arrow shaft 16 can break away from the urgent clamp ring 151 of push rod 15, arrow shaft 16 can be driven needle stand 13 and needle body 14 automatic pumpbacks and also be hidden in the push rod 15 to compress the back stretch of spring 17.But said modules expects to reach the purpose of taking in needle body 14 in theory, and it still has following disappearance and need to be resolved hurrily but when reality is used:
1. consult Fig. 2, because compression spring 17 is by the fixing effect acquisition location of arrow seat 161 with the push rod 15 urgent clamp rings 151 of arrow shaft 16, therefore, at compression spring 17 deposits back stretch is arranged, and the other end 172 is resisted against on the arrow shaft 16 File plates 163, and arrow shaft 16 is saved up strength under the situation of displacement backward, should compel clamp ring 151 and certainly will the enough power that engages will be arranged with arrow seat 161, otherwise can't fastening location arrow shaft 16 with compression spring 17, also can't be airtight arrow shaft 16 and push rod 15, and can make arrow shaft 16 also not with needle stand 13 fixed before, will break away from the urgent clamp ring 151 of push rod 15 because of the elastic force effect, or because arrow shaft 16 and 151 of urgent clamp rings have the gap, and have medicament to infiltrate situation in the push rod 15, so this arrow shaft 16 quite is not easy on the location with compression spring 17, and the situation of inefficacy is arranged easily.
2. opposite, can fastening location arrow shaft 16 and compression spring 17 if compel clamp ring 151, then in theory, need apply a bigger pushing force to arrow shaft 16, could remove the fixing effect of arrow shaft 16 and urgent clamp ring 151.And importantly, according to its icon structure and operation chart, after arrow shaft 16 is fixed with arrow 162 and needle stand 13, can be hampered by syringe 11 blind ends 111 and can't continue into to move, therefore, if continuous pushing push rod 15 attempts to remove the clamping function of arrow seat 161 and urgent clamp ring 151, expectation borrows compression spring 17 to disengage elastic-restoring force with pumpback needle stand 13, but be not difficult to find out by the situation of compeling clamp ring 151 by straight line L on the icon, this has a gradient and dwindles the urgent clamp ring 151 of bore, obviously can stop arrow shaft 16, arrow seat 161 moves with needle stand 13, can not drawing back needling body 14 and arrow shaft 16 was lost efficacy with compression spring 17.
[summary of the invention]
The object of the present invention is to provide a kind ofly can produce back-suction really, and use the easy deserted syringe of operation.
The invention provides a kind of deserted syringe, it is characterized in that it includes:
One needle cylinder main body, have one around an axis and define the tube wall of a small-bore section, a large aperture section, this tube wall has the port of export of a contiguous small-bore section, the arrival end, of a contiguous large aperture section is located at an inner surface and by the annular groove of large aperture section towards the extension of small-bore section, reaches a shoulder that is defined between small-bore section and annular groove;
One syringe needle group, the needle stand and the needle body that comprise mutual linking and hollow, this needle stand fixes in the annular groove of this needle cylinder main body, and be provided with one with this shoulder against positioning end, and one be in reverse to positioning end and place fastening end into this large aperture section, this needle body one end linking is attached to needle stand, and the reverse other end passes needle cylinder main body by the needle cylinder main body port of export;
One is snug fit at the push rod in the section of needle cylinder main body large aperture, have one around this axis and define caliber section in the big caliber section,, tubule footpath section around a tube wall and a capping, should be located at an inner surface and boundary in the intersegmental terrace of middle caliber Duan Yuxiao caliber, a contiguous tubule footpath section and towards the preceding open end of needle stand around tube wall tool one, and the back open end of a contiguous big caliber section, this capping sealing should be around open end behind the tube wall;
One arrow bolt, be contained in the push rod with the preceding open end of sealing push rod and with tubule footpath section airtight joint, and have one and close end, and one by compeling to close the positioning section that end oppositely extends towards needle stand and with fixed the compeling in needle stand fastening end;
One is compressive state and is contained in the compression spring in the caliber section in the push rod, has the end that bounces up that an end, that is resisted against the push rod terrace is in reverse to the seat end and is positioned at arrow bolt positioning section; And a locating part, be contained in this push rod in the caliber section, and the positioning section of location arrow bolt, and force the compression spring to keep compressive state;
Whereby, after finishing the injection purposes, further the pushing push rod is towards the displacement of the needle cylinder main body port of export, with the arrow bolt compel close the end combine with the fastening end of needle stand, and then the fixing state of releasing needle stand and needle cylinder main body, this needle stand fastening end can unload push rod tubule footpath section by pushing and withstanding arrow bolt, and make the arrow bolt produce the position-limiting action that displacement solution removes locating part, make the compression spring discharge back stretch synchronously, and then push the arrow bolt in conjunction with needle stand and needle body along caliber section greatly towards push rod after the open end displacement, with needle stand and needle body pumpback and be accommodated in the push rod.
Described deserted syringe, it is characterized in that: this locating part can be provided with a groove that is located at arrow bolt positioning section end, one is located at the scrobicular ring of caliber section inner surface in the push rod, reaching one is located on the compression spring and in abutting connection with the engaging circle that bounces up end, the footpath of this engaging circle is wider than the compression spring, and engage with the scrobicular ring of caliber section in the push rod, this compression spring bounces up end and fixes in the groove of arrow bolt positioning section, the compression spring is positioned in the push rod in the caliber section by engaging circle, and to bounce up the spacing arrow bolt positioning section of end, when unloading push rod tubule footpath section, needle stand fastening end pushing and withstanding arrow bolt makes the generation displacement, can make the engaging circle break away from the scrobicular ring of caliber section in the push rod, and discharge the back stretch that compresses spring, and produce displacement to bounce up end drive arrow bolt.
Described deserted syringe, it is characterized in that: this locating part has a scrobicular ring that is located at caliber section inner surface in the push rod, one is located at the bolt head of arrow bolt positioning section one end, an and bulge loop that is located at bolt head periphery and engages with caliber section scrobicular ring in the push rod, the arrow bolt is fixed in push rod in the caliber section, and with the end that bounces up of the spacing compression spring of bolt head, when unloading push rod tubule footpath section, needle stand fastening end pushing and withstanding arrow bolt makes the generation displacement, can make the bulge loop of bolt head break away from the scrobicular ring of caliber section in the push rod, and discharge the back stretch that compresses spring, and produce displacement to bounce up end promotion arrow bolt.
Described deserted syringe, it is characterized in that: this locating part has at least one push rod that is located at and centers on the jack in the caliber section in tube wall and the connection, one is located at the bolt head of arrow bolt positioning section one end, and at least one buckle, this buckle be provided with one with the pivot part that articulates around tube wall, one establish at one end and stretch through in plate in the caliber section, an and pressing plate that is in reverse to plate, this plate fastens the bolt head with location arrow bolt, make the bounce up end of arrow bolt with the spacing compression spring of bolt head, and, pressing plate make plate by withdrawing from the middle caliber section when pressing down, and when breaking away from the bolt head, meeting discharges the back stretch of compression spring, makes the compression spring produce displacement to bounce up end promotion arrow bolt.
Described deserted syringe, it is characterized in that: this deserted syringe has more a positioning seat, and the tube wall of this needle cylinder main body has more one and is located at large aperture section inner surface and is close to the positioning convex ring of small-bore section, this positioning seat is positioned in the section of needle cylinder main body large aperture and contiguous small-bore section movably, and engage the location with positioning convex ring, this positioning seat has a perforation that supplies needle stand to place, make needle stand be subject to the shoulder of needle cylinder main body and positioning seat and obtain the location, and pass positioning seat with the fastening end, when push rod pushes positioning seat towards the displacement of the needle cylinder main body port of export, can remove the fixing state of needle stand and positioning seat and needle cylinder main body.
Described deserted syringe, it is characterized in that: the tube wall of this this tube body have more one be formed on inner surface and be defined in annular groove and shoulder between Ka Gou, this Ka Gou extends into the small-bore section by the large aperture section, this needle stand has more and and the protruding bolt that with Ka Gou engage radially outstanding by positioning end, make needle stand obtain the location, when the arrow bolt engages with the needle stand fastening end to compel closing end, as long as turn push rod, will make the protruding bolt of needle stand break away from the Ka Gou of needle cylinder main body, and remove the fixing state of needle stand and needle cylinder main body.
Described deserted syringe is characterized in that: this arrow bolt has more one by compeling to close the thread segment that end extends, and this thread segment can place in the fastening end of needle stand, and compels to be solidified as a whole with needle stand.
Described deserted syringe is characterized in that: this arrow bolt has more one and is formed on the groove of compeling to close end and can fix with the needle stand fastening end.
Described deserted syringe, it is characterized in that: this needle stand has more one by the radially outstanding projection in fastening end, this arrow bolt has more several along the groove wall spiral card ditch that extends of shape in the shape of a spiral, when the arrow bolt engages end in contact to compel closing end with needle stand, as long as the turn push rod will make needle stand engage with groove with the spiral card ditch of projection along the arrow bolt.
Described deserted syringe, it is characterized in that: this syringe needle group more includes a sealing member, the sealing part has a pad that is resisted against the needle cylinder main body shoulder, an and packing ring that is resisted against between pad and needle stand, make the pressure accumulation space that defines a sealing between sealing member and positioning seat, this needle stand positioning end is resisted against on the sealing part, and has a breach that is communicated with the pressure accumulation space, accumulate in advance in this pressure accumulation space the fluid media (medium) that can produce predetermined pressure is arranged, when push rod pushes positioning seat towards the displacement of the needle cylinder main body port of export, can compression fluid medium and the force value the pressure accumulation space in is risen, form the propelling movement power of one passing needle stand in the push rod.
Described deserted syringe, it is characterized in that: the tube wall of this needle cylinder main body has more one first a linking section around the small-bore section, and several are connected the ribs that section outer surface axis direction extends along first, this syringe needle group have more one with the needle guard of first section of the linking socket and coating needle body.
Described deserted syringe is characterized in that: the tube wall of this needle cylinder main body has more one and is formed on the section connection of Duan Eryu large aperture, small-bore and does not have a camber taper seat of stage difference.
Described deserted syringe, it is characterized in that: this deserted syringe has more one and is connected part, and this needle cylinder main body has more an adjacency first linking section and is connected section with the port of export and caliber less than second of first section of linking, this linking part have one with the belled connecting base of needle cylinder main body second section of linking, and one be connected with connecting base and conduit that flexible is bent, this conduit ring overlays on outside the needle body, and can pass for needle body one tip.
Described deserted syringe, it is characterized in that: this needle cylinder main body has more several and is formed on the fin that inner surface and neighboring entry end distribute ringwise, this push rod has more several and is formed on around the convex thread of tube wall one outer surface, when the arrow bolt engages end in contact to compel closing end with needle stand, this push rod be able to the fin of convex thread and needle cylinder main body against, make this push rod can be in the process of turn, pass against the fin spiral toward the needle cylinder main body port of export with convex thread, and remove the fixing state of needle stand and needle cylinder main body reposefully.
[description of drawings]
The present invention is described in detail below in conjunction with drawings and Examples.
Fig. 1 is a cutaway view, and No. 5211628 case of United States Patent (USP) is described;
Fig. 2 is a part of enlarged drawing, and the situation of the fixed needle stand of this United States Patent (USP) case is described;
Fig. 3 is an exploded view, and one first preferred embodiment of the deserted syringe of the present invention is described;
Fig. 4 is a cutaway view, and the situation after this first preferred embodiment is made up is described;
Fig. 5 is an enlarged diagram, illustrates that this first preferred embodiment finishes the injection purposes:
Fig. 6 is an enlarged diagram, illustrates that a push rod pushes a positioning seat in this first preferred embodiment;
Fig. 7 is an enlarged diagram, illustrates that this first preferred embodiment unloads an arrow bolt;
Fig. 8 is a cutaway view, illustrates that this first preferred embodiment utilizes elastic-restoring force pumpback one needle body, and needle body is hidden in the push rod;
Fig. 9 is a cutaway view, this first preferred embodiment is described directly with the push rod drawing back needling body, and needle body is hidden in the push rod;
Figure 10 is a part of cutaway view, and another embodiment of this first preferred embodiment, one locating part is described;
Figure 11 is a cutaway view, says the locating part releasing of this another embodiment in this first preferred embodiment and the fixing state of a compression spring and push rod;
Figure 12 is a cutaway view, and one second preferred embodiment of the deserted syringe of the present invention is described;
Figure 13 is a cutaway view, illustrates that this second preferred embodiment utilizes elastic-restoring force pumpback one needle body, and needle body is hidden in the push rod;
Figure 14 is a cutaway view, and one the 3rd preferred embodiment of the deserted syringe of the present invention is described;
Figure 15 is an enlarged diagram, and another embodiment of a thread segment and an arrow bolt in the 3rd preferred embodiment is described;
Figure 16 is a cutaway view, illustrates that the 3rd preferred embodiment utilizes elastic-restoring force pumpback one needle body, and needle body is hidden in the push rod;
Figure 17 is a cutaway view, and one the 4th preferred embodiment of the deserted syringe of the present invention is described;
Figure 18 is a cutaway view, illustrates that the 4th preferred embodiment utilizes elastic-restoring force pumpback one needle body, and needle body is hidden in the push rod;
Figure 19 is a part of cutaway view, and another that a needle cylinder main body and a push rod in the 4th preferred embodiment be described implemented aspect;
Figure 20 is a cutaway view, and one the 5th preferred embodiment of the deserted syringe of the present invention is described;
Figure 21 is an enlarged diagram, illustrates that the 5th preferred embodiment engages with a needle stand with an arrow bolt, and removes a needle stand and needle cylinder main body fixing state synchronously;
Figure 22 is an enlarged diagram, and the fixing effect of removing the fixing effect of a needle cylinder main body and needle stand in the 5th preferred embodiment and unloading an arrow bolt and a push rod synchronously is described;
Figure 23 is a cutaway view, illustrates that the 5th preferred embodiment utilizes elastic-restoring force pumpback one needle body, and needle body is hidden in the push rod;
Figure 24 is a top view, and another embodiment of a locating part in the 5th preferred embodiment is described;
Figure 25 is a part of cutaway view, illustrates that another embodiment of this locating part fixes an arrow bolt and a compression spring in the 5th preferred embodiment;
Figure 26 is a part of cutaway view, illustrates that another embodiment of this locating part removes arrow bolt and the fixing state that compresses spring in the 5th preferred embodiment; And
Figure 27 is a part of cutaway view, and the 3rd embodiment of the 5th preferred embodiment one locating part is described.
[specific embodiment]
As Fig. 3, Fig. 4, first preferred embodiment of the deserted syringe of the present invention includes a needle cylinder main body 2, a positioning seat 3, a syringe needle group 4, a push rod 5, an arrow bolt 6, a compression spring 7 and a locating part 8.
This needle cylinder main body 2 has one around an axis X and define the tube wall 23 of a small-bore section 21, a large aperture section 22.This tube wall 23 has the port of export 231 of a contiguous small-bore section 21, the arrival end 232 of one contiguous large aperture section 22, one annular groove 234 that is formed on an inner surface 230 and extends towards small-bore section 21 by large aperture section 22, one is defined in the shoulder 235 of 234 of small-bore section 21 and annular grooves, one is formed on the positioning convex ring 238 of large aperture section 22 inner surfacies 230 and contiguous small-bore section 21, one is formed on the internal projecting ring 239 of large aperture section 22 inner surfacies 230 and neighboring entry end 232, one one first linking section 233 around small-bore section 21, several are connected the axially extended rib 236 of section 233 outer surfaces along first, and one is formed on small-bore section 21 and is connected and does not have the camber taper seat 26 that a stage differs from large aperture section 22.
This positioning seat 3 is packed in contiguous small-bore sections 21 in the needle cylinder main body 2 large aperture sections 22, and engages the location with positioning convex ring 238, tube wall 23 inner surfacies 230 airtight contacts of this positioning seat 3 and needle cylinder main body 2, and have a perforation 31 that runs through along this axis X.
This syringe needle group 4 has a needle stand 41 and a needle body 42 and a needle guard 43 of mutual linking and hollow.In the perforation 31 that this needle stand 41 is set in positioning seat 3 and the annular groove 234 of needle cylinder main body 2, and have with shoulder 235 against positioning end 411, and pass the fastening end 412 of positioning seat 3 perforation 31.This needle body 42 1 ends linking is attached to needle stand 41, and the reverse other end can pass needle cylinder main body 2 by needle cylinder main body 2 ports of export 231.This needle guard 43 can with first section of linking, 233 fits, and can conflict with fin 236, make needle guard 43 coat needle bodies 42, avoid needle body 42 to contact with the external world.
This push rod 5 is slidably made limited propelling movement stroke in needle cylinder main body 2 large aperture sections 22, and have around this axis X and define caliber section 52, tubule footpath section 53 in the big caliber section 51, around tube wall 54, a capping 55 and an elasticity ring taps 56.Should around tube wall 54 have one be formed on an inner surface 541 and boundary in, terrace 542, the one contiguous tubule footpath section 53 of 52,53 of tubule footpath sections and towards the preceding open end 543 of positioning seat 3, and the back open end 544 of a contiguous big caliber section 51.This capping 55 screws togather with open end 544 behind tube wall 54, and open end 544, sealing back.This elasticity ring taps 56 is nested with around tube wall 54 tubules footpath section 53 peripheries, and with tube wall 23 inner surfacies 230 airtight contacts of needle cylinder main body 2.
This arrow bolt 6 fixes slidably in the tubule footpath of push rod 5 section 53, and hermetic closed preceding open end 543 around tube wall 54.This arrow bolt 6 have one towards needle stand 41 compel close end 61, by compeling to close the positioning sections 62 that end 61 oppositely extends, and one be formed on compel to close end 61 and can with the fixed groove 63 in needle stand 41 fastening ends 412.
This compression spring 7 is contained in the middle caliber section 52 of push rod 5, and has one by being sitting in the seat end 71 around tube wall 54 terraces 542, and one be in reverse to seat end 71 bounce up end 72.
This locating part 8 have one be formed in the screw thread scrobicular ring 81, of caliber section 52 inner surfacies 541 be formed on the groove 82 of arrow bolt 6 positioning sections 62, and one be formed on 7 ends 71 of compression spring with bounce up 72 at end and contiguous bounce up hold 72 engage circle 83.These groove 82 voltage supply spring 7 that contracts bounces up end 72 and fixes, and makes arrow bolt 6 and compression spring 7 fixed formation interlocks.The footpath of this engaging circle 83 be wider than compression spring 7 and in caliber section 52 and less than big caliber section 51, and fasten in screw thread scrobicular ring 81, makes compression spring 7 be positioned in tube wall 54 and keep compressive state, and deposit has back stretch.
Consult Fig. 5, when push rod 5 pushes to the injection stroke terminal point, and after finishing the injection purposes, this push rod 5 can contact with positioning seat 3 with elasticity ring taps 56, and at this moment, user need only continue to push push rod 5.Whereby, just can be in the process of needle cylinder main body 2 ports of export 231 displacements at push rod 5, the needle stand 41 of pushing positioning seat 3 and fixing with positioning seat 3.
Consult Fig. 6, at this moment, since needle stand 41 positioning ends 411 be hampered by needle cylinder main body 2 shoulder 235 and can't displacement, therefore, have only positioning seat 3 to push with push rod 5, and 231 displacements along needle stand 41 towards the port of export, simultaneously, the needle stand 41 that this can't move towards needle cylinder main body 2 ports of export 231, can consult Fig. 7 with the arrow bolt 6 of fastening end 412 reverse pressure-rams 5, arrow bolt 6 be fixed with needle stand 41 fastening ends 412 with groove 63 form interlock, unload tubule footpath section 53 synchronously, and in middle caliber section 52, produce displacement around tube wall 54.
Consult Fig. 8, whereby, this is reversed pushes and enters arrow bolt 6 in the big caliber section 51, the engaging circle 83 that can drive compression spring 7 break away from around the screw thread scrobicular ring 81 of tube wall 54 and free slippage in big caliber section 51, make compression spring 7 bullets open and discharge back stretch, and can promote arrow bolt 6 to bounce up end 72, and drive needle stand 41, needle body 42 along the middle caliber section 52 of push rod 5, big caliber section 51 open end 544 displacements backwards, and then needle stand 41 and needle body 42 are retained in the push rod 5.Make the syringe that abandons to isolate needle body 42 with needle cylinder main body 2 and push rod 5, after the release medical personnel use conventional syringes, contact with needle body, cause danger injured, that infect because tidying up the syringe needle group.
Consult Fig. 9, what deserves to be mentioned is at this, the present invention also can be after arrow bolt 6 and needle stand 41 fix, direct mode with pumpback push rod 5, direction pull push rod 5 towards needle cylinder main body 2 arrival ends 232, and can under the situation that does not activate spring 7, needle stand 41 and needle body 42 be hidden in the needle cylinder main body 2.
In addition, consult Figure 10, this locating part 8 is formed with the screw thread scrobicular ring 81 except caliber section 52 in push rod 5, also can have a bolt head 84 that is formed on arrow bolt 6 positioning sections 62 1 ends, and a bulge loop 85 that is formed on bolt head 84 peripheries and engages with caliber section 52 screw thread scrobicular rings 81 in the push rod 5.Whereby, arrow bolt 6 is fixed in push rod 5 in the caliber section 52, and with bolt head 84 spacing compression springs 7 bounce up the end 72, as shown in figure 11, when needle stand 41 fastening ends 412 pushing and withstanding arrow bolts 6 unload tubule footpath section 53, make arrow bolt 6 produce displacement, can make bolt head 84 screw-shaped bulge loops 85 break away from the screw thread scrobicular ring 81 of caliber section 52 in the push rod 5, and the back stretch of release compression spring 7, and, needle stand 41 and needle body 42 are hidden in the action of push rod 5 to bounce up the 6 generation displacements of end 72 promotion arrow bolts.
Consulting Figure 12, Figure 13, is the present invention's second preferred embodiment, and itself and first preferred embodiment are roughly the same, difference be in: this syringe needle group 4 has more a sealing member 44.
Sealing part 44 is contained in needle cylinder main body 2 annular grooves 234, and has a pad 441 that is resisted against needle cylinder main body 2 shoulders 235, and a packing ring 442 that is resisted against 41 of pad 441 and needle stands, make 3 of sealing member 44 and positioning seats define a pressure accumulation space 443 that seals.Be filled with fluid media (medium) in this pressure accumulation space 443, can produce predetermined pressure, this fluid media (medium) can liquid or gas wherein a kind of.
This needle stand 41 has more a breach 413 that is communicated with pressure accumulation space 443.
Whereby, when push rod 5 pushes positioning seats 3 towards 231 displacements of needle cylinder main body 2 ports of export, except meeting with arrow bolt 6 fixed needle stands 41, and arrow bolt 6 is unloaded outside the tubule footpath section 53, simultaneously can compressed media and the force value in the pressure accumulation space 443 are risen, form one channelling and go into the propelling movement power of needle stand 41 breach 413, and can assist 6 displacements of arrow bolt, and the back stretch of the aforementioned compression spring 7 of arranging in pairs or groups, make arrow bolt 6 can drive needle stand 41 and needle body 42 more smoothly, needle stand 41 and needle body 42 are hidden in the push rod 5.
Consult Figure 14, it is the present invention's the 3rd preferred embodiment, the 3rd preferred embodiment is applied in the syringe (as the syringe of capacity 1CC) of minimum capacity, difference is in the size of: this needle cylinder main body 2, positioning seat 3, needle stand 41, push rod 5, arrow bolt 6, compression spring 7 and locating part 8 less, and in moulding because of less some the elementary errors distance of size.And this arrow bolt 6 have more one by arrow bolt 6 compel to close the end 61 extended thread segments 65, and this thread segment 65 can be as shown in figure 14 extended and passes towards seat end 71 and compeled to close end 61 by the end 72 that bounces up of compression spring 7, or shown in Figure 15, make this thread segment 65 and compel to close end 61 grafting.Whereby, consult Figure 16, this thread segment 65 can directly place in needle stand 41 fastening ends 412, and compels to be solidified as a whole with needle stand 41.Whereby, can utilize the elastic-restoring force of compression spring 7 equally, needle stand 41 and needle body 42 pumpbacks to push rod 5, are reached isolated purpose.
Consulting Figure 17, shown in Figure 180, is the present invention's the 4th preferred embodiment, and the present invention more can comprise one and be connected part 9.And the tube wall 23 of needle cylinder main body 2 has more an adjacency first linking section 233 and is connected section 237 with the port of export 231 and caliber less than second of first section of linking 233.
This linking part 9 have one with needle cylinder main body 2 second sections of linking 237 belled connecting bases 91, and one be connected with connecting base 91 and conduit 92 that flexible is bent.These conduit 92 rings overlay on outside the needle body 42, and can pass for needle body 42 1 tips 421.
Whereby, when needle body 42 tips 421 puncture in the blood vessel of animal body, and after in guiding catheter 92 intravasations, user is pull push rod 5 directly, small amounts of blood is extracted in the needle cylinder main body 2 by needle body 42, provide the operator to detect in the whether correct importing blood vessel of needle body 42 and conduit 92.After needle body 42 detaches conduit 92, finishes the operation that conduit 92 is set in the blood vessel, can utilize equally aforementioned elastic-restoring force with needle stand 41 and needle body 42 pumpbacks to push rod 5, reach isolated purpose.At this moment, also can supply the blood of detection applications by needle cylinder main body 2 and fit that is connected part 9 and pull push rod 5 with extraction.Whereby, the release medical personnel contact with needle body 42 because tidying up syringe needle group 4 after finishing 92 settings of intravenous injection conduit or blood drawing, cause danger injured, that infect.
What deserves to be mentioned is, aforementioned the 4th preferred embodiment can be as shown in figure 19, be formed with the fin 24 that several neighboring entry ends 232 are arranged in the form of a ring at needle cylinder main body 2 inner surfacies 230, reach in push rod 5 around tube wall 54 outer surfaces 546 and be formed with several convex threads 547, push rod 5 be able to be contacted with the fin 24 of needle cylinder main body 2 with convex thread 547, and need only this push rod 5 of turn, just can be in the process of push rod 5 turns, with convex thread 547 against fin 24 stably spiral pass toward the direction of needle cylinder main body 2 ports of export 231.Whereby, stably with needle stand 41 with needle body 42 pumpbacks and be accommodated in the push rod 5, and the conduit 92 that is connected part 9 can be retained in the blood vessel of animal body.
Consulting Figure 20, is the present invention's the 5th preferred embodiment, and the 5th preferred embodiment does not have the setting of positioning seat, and needle cylinder main body 2 is used in catheter in blood vessel 92 and is provided with and the blood drawing function, and variation length, itself and the 4th preferred embodiment are roughly the same, difference be in:
This needle cylinder main body 2 has more one and is formed on inner surface 230 and is defined in annular groove 234 and the card ditch 25 of 235 of shoulders.The annular groove 234 that this card ditch 25 extends into small-bore section 21 by large aperture section 22 along this axis X radially extends and forms.
This needle stand 41 has more one by the radially outstanding projection 414 in fastening end 412, and one by positioning end 411 protruding bolt 415 radially outstanding and that engage with needle cylinder main body 2 card ditches 25.
This arrow bolt 6 has more several by compeling to close end 61 along the groove 63 walls spiral card ditch 65 that extends of shape in the shape of a spiral.
When push rod 5 in the turn process, when passing with the direction of convex thread 547 against fin 24 spirals toward needle cylinder main body 2 ports of export 231, consult Figure 21, Figure 22, needle stand 41 is engaged with groove 63 with the spiral card ditch 65 of projection 414 along arrow bolt 6, make the card ditch 25 of the protruding bolt 415 disengaging needle cylinder main body 2 of needle stand 41 synchronously, consult Figure 23, and then disengaging needle cylinder main body 2 small-bore sections 21, and pushing and withstanding arrow bolt 6 unloads push rod 5 tubules footpath section 53 and produces displacement, and then the back stretch of release compression spring 7, make arrow bolt 6 in conjunction with needle stand 41 and needle body 42 and along 51 sections of big calibers towards push rod 5 back open end 544 displacements, and can be with needle stand 41 with needle body 42 pumpbacks and be accommodated in the push rod 5.
Consult Figure 24, Figure 25, this locating part 8 also can have a bolt head 84, that is formed on arrow bolt 6 positioning sections 62 ends be formed on push rod 5 around tube wall 54 1 sides and in being communicated with the jack 86 in the caliber section 52, a buckle 87 and around the III shape button 88 of push rod 5 around tube wall 54 peripheries.This buckle 87 have one with III shape detain pivot part 871, that 88 two ends 881 articulate form at one end and stretch through in plate 872 in the caliber section 52, an and pressing plate 873 that is in reverse to plate 872, this plate 872 can fasten bolt head 84 with location arrow bolt 6, makes arrow bolt 6 hold 72 with bouncing up of bolt head 84 spacing compression springs 7.Consult Fig. 26 whereby, when pressing plate 873 presses down plate 872 is withdrawed from by middle caliber section 52, and when breaking away from bolt head 84, can discharge the back stretch of compression spring 7, make compression spring 7 promote the 6 generation displacements of arrow bolt to bounce up end 72, produce as previously mentioned, needle stand 41 and needle body 42 are hidden in action in the push rod 5.
Consult Figure 27, the present invention also can push rod 5 form around tube wall 54 2 sides two be communicated with in jack 86 in the caliber section 52, and in stretching through with the plate 872 of two buckles 87 in the caliber section 52, fasten bolt head 84 with location arrow bolt 6 and compress spring 7.Whereby, plate 872 is withdrawed from stably by middle caliber section 52 inter-syncs, and when breaking away from bolt head 84, can discharge the back stretch of compression spring 7 stably, and then needle stand 41 and needle body 42 are hidden in the push rod 5 when two pressing plates 873 press down simultaneously.
Conclude above-mentionedly, deserted syringe of the present invention is real to have had following listed advantage and effect:
1. the present invention need only continue application of force pushing push rod 5 after injection is finished, and just can unload arrow bolt 6, and the back stretch of release compression spring 7, and then needle body 42 is hidden in the push rod 5, not only can reach the purpose of isolating needle body 42, and quite time saving and energy saving in the use.
2. and because arrow bolt 6, compression spring 7 particular design structurally, make the present invention except centering on tube wall 54 tubules footpath section 53 airtight contacts by arrow bolt 6 and push rod 5, prevent that medicament from infiltrating in the push rod 5, more can try hard to recommend outside press push rod 5 to unload arrow bolt 6 after, discharge the back stretch of compression spring 7 synchronously, and can produce back-suction really.The assembly that makes the present invention utilize special structural design, simplify promotes the practicality and the assembling efficiency of syringe, and can reduce the contaminated chance of assembly, and reduces material, assembling, detection cost.
3. the present invention can cooperate and be connected part 9 after intravenous injection, conduit 92 is retained in the blood vessel, finish the purpose that catheter in blood vessel 92 is provided with, and equally can by elastic-restoring force with needle body 42 pumpbacks to push rod 5, exempt medical personnel and carry out catheter in blood vessel when operation is set with conventional syringe, because tidy up needle body 42, and contact, cause danger injured, that infect with needle body 42.
Claims (14)
1, a kind of deserted syringe is characterized in that it includes:
One needle cylinder main body, have one around an axis and define the tube wall of a small-bore section, a large aperture section, this tube wall has the port of export of a contiguous small-bore section, the arrival end, of a contiguous large aperture section is located at an inner surface and by the annular groove of large aperture section towards the extension of small-bore section, reaches a shoulder that is defined between small-bore section and annular groove;
One syringe needle group, the needle stand and the needle body that comprise mutual linking and hollow, this needle stand fixes in the annular groove of this needle cylinder main body, and be provided with one with this shoulder against positioning end, and one be in reverse to positioning end and place fastening end into this large aperture section, this needle body one end linking is attached to needle stand, and the reverse other end passes needle cylinder main body by the needle cylinder main body port of export;
One is snug fit at the push rod in the section of needle cylinder main body large aperture, have one around this axis and define caliber section in the big caliber section,, tubule footpath section around a tube wall and a capping, should be located at an inner surface and boundary in the intersegmental terrace of middle caliber Duan Yuxiao caliber, a contiguous tubule footpath section and towards the preceding open end of needle stand around tube wall tool one, and the back open end of a contiguous big caliber section, this capping sealing should be around open end behind the tube wall;
One arrow bolt, be contained in the push rod with the preceding open end of sealing push rod and with tubule footpath section airtight joint, and have one and close end, and one by compeling to close the positioning section that end oppositely extends towards needle stand and with fixed the compeling in needle stand fastening end;
One is compressive state and is contained in the compression spring in the caliber section in the push rod, has the end that bounces up that an end, that is resisted against the push rod terrace is in reverse to the seat end and is positioned at arrow bolt positioning section; And
One locating part is to be contained in this push rod in the caliber section, and the fixing positioning section of arrow bolt, and compresses this compression spring.
2, deserted syringe as claimed in claim 1, it is characterized in that: this locating part is provided with the scrobicular ring that a groove, that is located at arrow bolt positioning section end is located at caliber section inner surface in the push rod, reaching one is located on the compression spring and in abutting connection with the engaging circle that bounces up end, the footpath of this engaging circle is wider than the compression spring, and engage with the scrobicular ring of caliber section in the push rod, this compression spring bounces up end and fixes in the groove of arrow bolt positioning section, the compression spring is positioned in the push rod in the caliber section by engaging circle, and to bounce up the spacing arrow bolt positioning section of end.
3, deserted syringe as claimed in claim 1, it is characterized in that: this locating part has the bolt head that a scrobicular ring, that is located at caliber section inner surface in the push rod is located at arrow bolt positioning section one end, an and bulge loop that is located at bolt head periphery and engages with caliber section scrobicular ring in the push rod, the arrow bolt is fixed in push rod in the caliber section, and with the end that bounces up of the spacing compression spring of bolt head.
4, deserted syringe as claimed in claim 1, it is characterized in that: this locating part have at least one be located at push rod around tube wall and in being communicated with the jack, in the caliber section be located at the bolt head of arrow bolt positioning section one end, and at least one buckle, this buckle be provided with one establish at one end with the pivot part, that articulates around tube wall and stretch through in plate in the caliber section, an and pressing plate that is in reverse to plate, this plate fastens the bolt head with location arrow bolt, makes the bounce up end of arrow bolt with the spacing compression spring of bolt head.
5, deserted syringe as claimed in claim 1, it is characterized in that: this deserted syringe has more a positioning seat, and the tube wall of this needle cylinder main body has more one and is located at large aperture section inner surface and is close to the positioning convex ring of small-bore section, this positioning seat is positioned in the section of needle cylinder main body large aperture and contiguous small-bore section movably, and engage the location with positioning convex ring, this positioning seat has a perforation that supplies needle stand to place, make needle stand be subject to the shoulder of needle cylinder main body and positioning seat and obtain the location, and pass positioning seat with the fastening end.
6, deserted syringe as claimed in claim 1, it is characterized in that: the tube wall of this this tube body have more one be formed on inner surface and be defined in annular groove and shoulder between Ka Gou, this Ka Gou extends into the small-bore section by the large aperture section, this needle stand has more and and the protruding bolt that with Ka Gou engage radially outstanding by positioning end, makes needle stand obtain to locate.
7, deserted syringe as claimed in claim 1 is characterized in that: this arrow bolt has more one by chasing after the thread segment that closes the end extension, and this thread segment places in the fastening end of needle stand, and compels to be solidified as a whole with needle stand.
8, deserted syringe as claimed in claim 1 is characterized in that: this arrow bolt has more one and is located at the groove of compeling to close end and fixing with the needle stand fastening end.
9, deserted syringe as claimed in claim 8 is characterized in that: this needle stand has more one by the radially outstanding projection in fastening end, and this arrow bolt has more several along the groove wall spiral card ditch that extends of shape in the shape of a spiral.
10, deserted syringe as claimed in claim 1, it is characterized in that: this syringe needle group more includes a sealing member, the sealing part has a pad that is resisted against the needle cylinder main body shoulder, an and packing ring that is resisted against between pad and needle stand, make the pressure accumulation space that defines a sealing between sealing member and positioning seat, this needle stand positioning end is resisted against on the sealing part, and has a breach that is communicated with the pressure accumulation space, accumulates the fluid media (medium) that the tool predetermined pressure is arranged in this pressure accumulation space.
11, deserted syringe as claimed in claim 1, it is characterized in that: the tube wall of this needle cylinder main body has more one first a linking section around the small-bore section, and several are connected the ribs that section outer surface axis direction extends along first, this syringe needle group have more one with the needle guard of first section of the linking socket and coating needle body.
12, deserted syringe as claimed in claim 1 is characterized in that: the tube wall of this needle cylinder main body has more one and is formed on the section connection of Duan Eryu large aperture, small-bore and does not have a camber taper seat of stage difference.
13, deserted syringe as claimed in claim 11, it is characterized in that: this deserted syringe has more one and is connected part, and this needle cylinder main body has more an adjacency first linking section and is connected section with the port of export and caliber less than second of first section of linking, this linking part have one with the belled connecting base of needle cylinder main body second section of linking, and one be connected with connecting base and conduit that flexible is bent, this conduit ring overlays on outside the needle body, and passes for needle body one tip.
14, deserted syringe as claimed in claim 1 is characterized in that: this needle cylinder main body has more several and is formed on the fin that inner surface and neighboring entry end distribute ringwise, and this push rod has more several and is formed on around the convex thread of tube wall one outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031380514A CN100427156C (en) | 2003-05-30 | 2003-05-30 | Disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031380514A CN100427156C (en) | 2003-05-30 | 2003-05-30 | Disposable syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1552471A CN1552471A (en) | 2004-12-08 |
| CN100427156C true CN100427156C (en) | 2008-10-22 |
Family
ID=34323639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031380514A Expired - Fee Related CN100427156C (en) | 2003-05-30 | 2003-05-30 | Disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100427156C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512722B (en) * | 2005-09-19 | 2013-10-30 | 许明正 | Intravenous catheter setter capable of drawing and detecting backflow blood |
| CN1935285B (en) * | 2005-09-19 | 2012-07-18 | 许明正 | Venous catheter setter capable of drawing and detecting return blood |
| CN102188766A (en) * | 2011-03-12 | 2011-09-21 | 徐昊华 | Needle exchangeable and automatically-retractable disposable safety syringe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5211628A (en) * | 1991-09-30 | 1993-05-18 | Marshall John M | Syringe with automatic retracting needle |
| US5389076A (en) * | 1994-04-05 | 1995-02-14 | Shaw; Thomas J. | Single use medical device with retraction mechanism |
| WO1996027403A1 (en) * | 1995-03-06 | 1996-09-12 | Clemens Anton H | Needle retraction system |
| EP1273316A1 (en) * | 2001-07-02 | 2003-01-08 | Sergio Restelli | Disposable safety syringe |
-
2003
- 2003-05-30 CN CNB031380514A patent/CN100427156C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5211628A (en) * | 1991-09-30 | 1993-05-18 | Marshall John M | Syringe with automatic retracting needle |
| US5389076A (en) * | 1994-04-05 | 1995-02-14 | Shaw; Thomas J. | Single use medical device with retraction mechanism |
| WO1996027403A1 (en) * | 1995-03-06 | 1996-09-12 | Clemens Anton H | Needle retraction system |
| EP1273316A1 (en) * | 2001-07-02 | 2003-01-08 | Sergio Restelli | Disposable safety syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1552471A (en) | 2004-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1095966C (en) | Connector | |
| JP2014526054A (en) | Reusable fitting for attaching a conduit to a port | |
| TWI250878B (en) | Disposable syringe | |
| CN102065936A (en) | Automatic injection device with trigger lock | |
| CN104689426A (en) | Autoinjector | |
| CN100427156C (en) | Disposable syringe | |
| CN101843939A (en) | The self-administration device that is used for liquid medicine | |
| TWI705195B (en) | Fluid pressure cylinder with booster mechanism | |
| CN105025961A (en) | Lockable syringe assemblies and related devices and methods | |
| CN106164492A (en) | There is the rotary apparatus of radial magnetic force bonder | |
| CN1189688C (en) | Pipe joint | |
| CN207575511U (en) | A kind of muscle recovery cartridge syringe | |
| KR20150118137A (en) | Pump and injector for liquid chromatography | |
| CN107530487A (en) | Installation interface member for Medical Devices | |
| JPH07239083A (en) | Quick disconnect coupling | |
| CN110206953B (en) | Quick-operation joint subassembly and socket thereof | |
| CN201310700Y (en) | Quick air pipe insertion base with locking structure | |
| US20010011592A1 (en) | Preloading type connector | |
| CN110762302A (en) | Hydraulically-driven circumferential clamping type submarine pipeline connector | |
| CN100522271C (en) | Disposable syringe | |
| CN100475282C (en) | Syringe with back draft | |
| CN214119291U (en) | Push type fluid connector | |
| CN111789701A (en) | Injection device and exchange system comprising same | |
| WO2014155275A1 (en) | A female terminal for rapid-fit connections | |
| CN214222350U (en) | Rotary push-press pipe joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20100530 |