WO2005037351A1

WO2005037351A1 - Safety syringe

Info

Publication number: WO2005037351A1
Application number: PCT/CN2004/001033
Authority: WO
Inventors: Ping-Te Huang
Original assignee: Ping-Te Huang
Priority date: 2003-09-09
Filing date: 2004-09-09
Publication date: 2005-04-28
Also published as: AU2004281092A1; JP2007504868A; RU2006106780A; RU2329067C2; KR20060128854A; MXPA06002688A; BRPI0413773A

Abstract

A safety syringe includes a block-combined pedestal unit (20) invaginating in the interior of the syringe barrel (10), the block-combined pedestal unit has a sleeve (21) and a sealed part (22) directly formed on the sleeve (22). The sleeve (22) is made of elastic material, it has external diameter portion formed on the external of the sleeve (21) and may hermetically engage the interior wall of the syringe barrel chamber (111), thus the sealed part (22) is airproofly and elastically invaginated in the syringe barrel (10).

Description

TECHNICAL FIELD

The invention relates to a syringe, in particular to a safety syringe capable of retracting the needle body to the inside of the injection after the injection. Background technique

As shown in Figs. 17 and 18, there is an existing device (application No. 87219129), which includes a cylinder 1, an engaging seat installed inside the ¾ cylinder 1, and an engaging seat. 2 screw-on positioning needle group 3 and one can be in ¾ ^

The push rod 4 produced in 1; n inside has a receiving chamber dish, a closed hole 102 and a shoulder 103 between the receiving chamber 101 HW 102; the The engaging seat 2 includes a disc seat 201 that can be positioned on the shoulder 103, a cylindrical portion 202 that is protruded on the surface of the ffiHI along the axis, and a 0 that can be sleeved on the cylindrical portion 202. A ring 203, one end of the inner surface of the cylindrical portion 202 is convexly provided with a flange 204 toward the axis, and the other end is provided with a threaded portion 205; the needle group 3 has a needle seat 301 which can be screwed on the threaded portion 205 and A needle body 302 fixed inside the needle seat; the »4 has a susceptible; M 401, a piston 402 provided in the miHOl J a can be hermetically sealed in the accommodation chamber 101, and a device At the moment of the piston 402 and the flange 204 and the H¾ 403 which can be interconnected with the engaging seat 2 at the appropriate time, the center of the tenon is provided with "« 404 along the axis, which promotes the tenon 403 to be retractable and can be released after the force is removed. The feature of automatic pop-up; when the engaging seat 2 is sleeved through the opening of the accommodation chamber, and the cylindrical portion 202 is sleeved into the front hole 102, it is difficult to 201 ¾ ± When the crane part 103, the push rod 4 can be used to insert into the accommodating chamber 101 and generate the engaging seat 2 (but the tongue 403 does not eat the flange 204), so that the engaging seat 2 is positioned, and the needles of each needle group 3 are frequently used. The seat 301 is screwed into the threaded part 205 of the engagement seat 2 from the ¾ ^ 102 fibrous hole 102, and the courtyard is assembled; although the rattan can reach the intended shed purpose, it is being manufactured and assembled. It has the following defects:

1. The snap-on seat 2 and the 0-ring 203 are two components, which must be manufactured by two machines and need to be installed, which will increase the manufacturing assembly cost.

2. The 0-ring 203 is small in size. It is not easy to assemble with Λ. If it is assembled with a machine, the pharyngeal 0-ring itself is flexible, so it is easy to produce during assembly and causes a high defect rate. Once tripped and stuck on the operating machine, the shed must be stopped for maintenance.

When assembling, the push rod 4 must be inserted into the container of the ¾ ^ cylinder 1 and the engagement seat 2 itt can be used to smoothly screw the engagement seat 2 and the needle group 3. The assembly operation is quite troublesome and the production capacity is not

4. Using the 0-ring 203 ¾i 殳 on the engagement seat 2, there will be a lot of components, and in order for the tongue 403 to pass the flange 204 smoothly, a notch 404 must be opened in the center of the tongue 403, which is also more complicated in structure . 5. The engagement seat 2 and the needle seat 301 are parts of the? H pull body. The group shot must be fixed, and the assembly seat 2 and the needle seat 301 must be relatively woven during assembly to make the needle seat 301 smooth. Screwing into the threaded portion 205 of the engagement seat 2 is slightly troublesome in operation. Summary of the Invention

The technical problem to be solved by the present invention is: a safety syringe which is easy and fast to assemble, and can also prevent detachment of porridge when assembly by a machine, thereby improving productivity.

Another object of the present invention is to provide a syringe in which the needle body can be automatically deflected to prevent the needle body from being exposed when the needle body is retracted into the decorative cylinder.

Another object of the present invention is to provide a syringe capable of combining the engaging seat unit with a needle aa, and a combination of a mime and a needle.

To this end, the device disclosed in the present invention includes a note, an engaging seat unit installed in the interior, and a needle ia¾ fixed in the engaging seat unit—the internally removable A push rod; wherein, a sealing member is made of elastic material and is directly formed and fixed on a sleeve member of an engagement seat unit, which has an overturned upside-down inner wall formed in a sleeve portion of the sleeve; thereby, When the push rod pushes the engaging base unit along the axis, the tenon is used to make the push rod and the engaging base unit achieve the purpose of locking.

In addition, there are various forms of the seal, such as the form of covering only the sleeve part, the form of forming a lower card, the form of simultaneously forming the upper and lower engaging parts, forming the upper thread part, and The lower card ^ spirit; and wherein the inclined engaging portion may be provided between the lower engaging portion and the hollow interior.

The ^ k syringe of the present invention directly integrates the seal member with plasticity and the sleeve member into a single body, which can not only seal the purpose, but also can achieve easy assembly and assembly, improve productivity, and reduce cost efficiency, so the warehouse body The purpose of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan exploded view illustrating a first preferred embodiment of the safety syringe of the present invention;

FIG. 2 is a perspective sectional view of the engaging seat unit of FIG. 1; FIG.

3 is a "exploded view" illustrating a second preferred embodiment of the safety syringe of the present invention;

Fig. 4 is a plan view showing a third preferred embodiment of the safety syringe of the present invention;

5 is a perspective cross-sectional view of the engaging seat unit of FIG. 4;

6 is a sectional view taken along line 4-4 in FIG. 4;

Fig. 7 is a combined sectional view illustrating that an engagement seat unit can be assembled inside the syringe of Fig. 1 after being connected with a needle group; Fig. 8 is an operation diagram illustrating the operation of a push rod and engaging a tenon to the card Inside the unit FIG. 9 is another operation schematic diagram illustrating a state in which the push rod is pulled and the needle is retracted inside the syringe;

10 is a plan sectional view of an engaging seat unit according to an embodiment of the present invention provided with an inclined shoulder;

FIG. 11 is an operation schematic diagram of the embodiment of FIG. 10, illustrating a state where the push rod is pulled and the needle body is retracted to the inside of the syringe; FIG. 12 is an exploded plan view of a fourth preferred embodiment of the present invention;

13 is a plan combined view of a fourth preferred embodiment of the present invention;

14 is a plan combined view of a fifth preferred embodiment of the present invention;

15 is a plan combination view of a modified example of the fifth preferred embodiment of the present invention;

FIG. 16 is a plan sectional view of the push rod piston of the present invention, which can be directly and integrally formed;

17 is an exploded perspective view of a conventional syringe;

Fig. 18 is an assembled sectional view of the safety syringe. Concrete form

The other technical contents, features, and effects of the present invention will be clearly understood in the detailed description of the difficult embodiment in consideration of the drawings.

As shown in Figs. 1 and 2, it is a first preferred embodiment of a surname device according to the present invention; it includes a fiber injection 10, an engagement seat unit 20 provided inside the injection cylinder 10, and an embedded card fixed to the engagement A needle set 30 and a movable part in the seat unit 20 are provided; M is provided with a push rod 40 inside the syringe 10.

ιο is made into a hollow cylindrical shape, and has a tube portion n surrounding the axis L and defining a container m, and a tube portion 12 fixed to one end portion of the tube portion 11 in a shape of ^. The tube portion has A through-hole 121 with a smaller leg diameter than the receiving chamber 111 is formed at a joint between the through-hole and the receiving chamber 111 and a ring portion 13 and an annular groove 14 are formed.

The engaging seat unit 20 is made of a hollow column shape, and is opened from the receiving chamber 111 opposite to the through hole 121 ¾ the ¾ ^ cylinder 10, and has a ^ cylinder member 21 and a direct molding and fixed in The sealing member 22 on the sleeve member 21; the sleeve member 21 has a disk portion 221 that can be on the fSih portion 13. The sealing member 22 is made of an elastic material (rubber in this embodiment), and is directly poured into the disc portion 221 of the outer casing 23 to form a whole. An outer diameter D of the sealing member 22 is larger than that of the corresponding marrow 21 The outer diameter d of the disk portion 221 allows the sealing member 22 to be inserted into the annular groove 14 inside the injection cylinder 10 to achieve an elastic and airtight state; and the sleeve member 21 has an upper assembly portion integrally formed in the hollow interior 210. 213 (in this embodiment is an internal thread) and a lower engaging portion 215 (in this embodiment, a barb body of a spacer ring row).

The needle set 30 includes a base 31, a needle body 32 fixed inside the needle base 31, and a cover body 33 on the needle base 31, which can be covered by the needle body 32; and the needle base 31 There is a connecting portion 311 which can be inserted into the through hole 121 and connected to the upper group ^ 213, and a retaining ring 312 which can be iftih at the end of the sleeve member 21.

The holding room m with a diameter of 40 mm has a ready-made one; ™ 41, a set in the 41 a The piston 42 on the side end and which can be hermetically sealed in the chamber 111 and a piston 42 provided on the piston 42 are provided with a tongue 43 which can be clicked ^ 215 in time; when the tongue is clicked into the lower card ^ 215, it can be made The push rod 40 and the engaging seat unit 20 are connected stably.

Figure 3 shows a second preferred embodiment of the safety device of the present invention. The structure is the same as that of the previous embodiment, and the difference is that the seal 22 further has a lower engaging portion 216 formed inside the sleeve member 21, so that the tenon 43 of the rod 40 can be used. Card ^ ¾ knot.

As shown in Figs. 4, 5, and 6, this is a third preferred embodiment of the silicon facial mask of the present invention. It includes an injection fiber 10, an engagement seat unit 20 installed inside the injection cylinder 10, a needle set 30 with an embedded card fixed in the engagement seat unit 20, and a movable: ¾¾ | provided in the injection cylinder 10 内的推杆 40。 10 inside the putter 40.

The injection cylinder 10 is made into a hollow cylindrical shape, and has a cylindrical portion 11 surrounding an axis L and defining a receiving chamber 111 and a bundled tube portion 12 fixedly connected to one end of the cylindrical portion. A smaller through hole 121 which can be courageous with the receiving chamber 111, and a joint 13 and a ring groove 14 are formed at the joint between the through hole and the receiving chamber 111.

The engaging seat unit 20 is made in a hollow column shape, and is opened in the receiving chamber 111 ¾ASim 10 opposite to the through hole 121, and has a member 21 and a seal directly fixed on the fiber member 21. Piece 22; the sleeve piece 21 has an outer shell body 23 made of a hard plastic material (polypropylene material for short may be referred to as PP in this embodiment) and a plastic elastic material (which is fixed inside the sleeve body 23) In this embodiment, an inner sleeve body 24 made of rubber material is used, and the sleeve body 23 has a disc portion 231 on the ¾ £ 13 portion, and a circular tube with a small circular diameter protruding from the surface of the overhang portion 231. A portion 232, an outer peripheral surface 233 surrounding the axis L and corresponding to the storage portion 231, and an inner peripheral surface 234 disposed opposite to the peripheral surface 233. The portion 231 is provided with a plurality of flow channels 235 extending in the radial direction and a number between The supporting block 236 between the equal flow channels 235; the inner sleeve body 24 is integrally formed by the seal 22 extending inwardly through the flow channel 235, and has an inner annular surface 241 formed around the axis L. The inner ring surface has a 242th portion adjacent to the receiving chamber 111 and protruding toward the axis L, and is opposite to a card 242 A second card ^ P 243 that also protrudes toward the axis L, an accommodation portion 244 between one and two cards 242, 243, which is produced farther from the axis L, and a township and one card 242 are connected to the accommodation portion 244 The ifcrt portion 245 and the "^ near the container 111 and provided on the crane" ^ P 242-side guide portion 246, the guide portion is tapered; the seal 22 is made of a plastic elastic material (This embodiment is rubber), and directly infused on the plate portion 231 of the outer shell 23, and use the dragon 235 to conduct resistance with the plate portion 231 and the inner casing 24 to produce a better consolidation ship (see Figure 7 for details) Moreover, the support block 236 can be used to make the inner cover body 24 have good positioning; while an outer ring portion can be convexly arranged on the perimeter surface 233, and an inner ring portion is connected to the inner cover body 24 as a whole, and The MD of the seal 22 is larger than the outer diameter do of the outer peripheral surface 233 of the corresponding outer casing 23 overnight.

The needle set 30 has a "seat 31, a needle body 32 fixed inside the needle seat 31, and a cover 33 provided on the needle seat 31 so as to cover the outside of the needle body 32; the outer periphery of the needle seat 31 The mask has a snap ring 312 that can be inserted into the through hole 121 and two cards 243 and is connected to the portion 311 in the positioning accommodation portion 244 and a ring 312 that can be positioned outside the round pipe portion 232 for the cover 33 R to be positioned. The push rod 40 ¾f is provided in the receiving chamber in of the face tube lo, and has an operable 41,-

41 Hi-end piston 42 which can be air-tight in the receiving chamber 111 and a piston 42 provided on the piston 42 can be woven in a timely manner ^ 1 to ^ the joint portion 242 and the tongue 43 positioned in the receiving portion 24 is locked; The minimum outer diameter of the tenon is also larger than the inner diameter formed by the ~ ^ 242, and by using the material characteristics of the inner sleeve body 24, after the tenon 43 passes through the ~ ^ 242, it can be firmly connected with the engagement seat unit 20.

As shown in FIG. 7, when assembling, the connecting portion 311 of the needle group can be inserted from the round pipe portion 232 port of the clamping seat unit 20 first, and the material characteristics of the inner sleeve body 24 are used to make the base portion 311 easy. That is, the second card ^ P 243 can be combined, and the needle group can be integrated with the snap-in seat unit 20; m, and then the snap-in seat unit 20 and the needle set 30 covered with the body 33 are contained in the self-contained room. 111 The open end is inserted to make the ¾ # ^ injection fiber 10, the direction of the needle body 32 and the cover body 33 is aligned with the through hole 121, when the seal 22 is embedded in the inner portion 231 of the ring groove 14 on the pubic portion 13 Then, the snap-in seat unit 20 and needle group 30 can be positioned in the note. Finally, as long as one end of the rod 40 provided with the piston 42 and the tongue 43 is inserted into the chamber 111, the assembly can be completed. The above-mentioned assembly can be assembled by automatic operation of the machine, and the seal 22 is not likely to be separated from the sleeve 21.

As shown in FIG. 8, before the injection of the syringe is completed and it is to be discarded, the operator only applies force and then pushes the push rod 40 toward the inside of the injection cylinder 10. By using the material characteristics of the inner sleeve 24, the # ¾ 43 is very easy to be made. «并 i¾ ^ ~ ^^ 242, and let the tongue 43 fall into the receiving portion 244, and» 40 is tied with the engaging seat unit 20 for the purpose; as shown in Fig. 9, when! Miscellaneous rod 40 faces mm lo When pulled externally, the push rod 0 §ρ can drive the inside of the engagement seat unit 20 and the needle group 30 mmi 10 to generate frost. When the needle body 32 and the cover body 33 have been hidden in the syringe, the woman 40 can be broken. The danger of stabbing the human body due to the fact that the cake body 32 is exposed. ,

As shown in FIG. 10, the inner sleeve body 24 and the inner annular surface 24 of the engaging seat unit 20 ′ further have an inclined shoulder between the weaving portion 242 and the accommodating portion 244. The first engaging portion 242 is provided with a co-rotation 247, which surrounds an oblique axis L, and the fiber axis L, which intersects the sense line L by about twenty degrees, the proper axis L, and the inclined shoulder. The portion 245 'intersects perpendicularly; as shown in FIG. 11, when »40 is connected to the engaging seat unit 20' by a tongue 43, the tongue 43 will cause a single side of the inner casing 24 due to the setting of ¾ 247. The outward squeezing effect, meanwhile, due to the seal 22,

The constraint limit of 10, when the joystick 40 is moved toward the outside of the aitffi lO (the cover can be removed first), the pressure of the original unilateral extrusion is released, and the inner casing 24 'mm 2 v is tilted. The function of the shoulder 245 ′ can make the engagement seat unit 20 and the needle body 32 of the needle group 30 retract into the inside 10, and it is unlikely to be skewed (in this case, i¾ | ¾ 247, which is squeezed by the tongue 43 The head is 43 m long, and the tip of the needle body 32 can be ^ ±± 13 in the ¾ ± 13 section, and then broken 40, which is the danger that the needle body 32 will be exposed.

As shown in Figs. 12 and 13, this is the fourth preferred embodiment of the ¾ ^ syringe of the present invention; this embodiment also includes a ¾iW 10, a snap-in seat unit 20 installed inside the A needle set 30 fixed in the engaging seat unit and a movable part are provided; and a push rod 40 provided inside the injection cylinder 10. The structure of the syringe 10 and the push rod 40 is completely the same as that of the third embodiment. It is the same, so it is not difficult anymore. The following describes only the engaging seat unit 20 and the needle group 30:

The difference is that the sealing member 22 has both an internally threaded section 217 and a lower engaging portion 216 formed inside the sleeve member 21, so that the needle seat 31 of the needle group 30 is provided with an externally threaded section 311 to form the aforementioned internal Thread section 217, the lower card 216 can be engaged with the mortise 43 of ff 40.

As shown in FIG. 14, this is a fifth embodiment of the device of the present invention, which also includes a ¾ 10, a snap-in seat unit 20 "installed inside the injection cylinder 10", and a fixed set The needle body 30 "in the snap-in seat unit 20" and a »40" that is removably inserted inside the io ". The structure of the ¾I IO "and the push rod 40" is exactly the same as that of the third embodiment, so it is no longer described below only for the engagement seat unit 20 "and the needle body 30":

The engagement seat sheet 20 "has a barrel member 21", a sealing member 22 directly facing and fixed on the machine cow 21 ", and a needle seat 25" formed integrally with the sleeve member 21 "; The sleeve member 21 "has an outer sleeve body 23" made of a desired plastic material and an inner sleeve body 24 "which is fixed inside the outer sleeve body 23" and is made of an elastic material. A disc portion 231 "shameably on the ¾ h portion 13", a disc portion 231 "protruding on the side and a glass tube diameter 232", a circle portion 231 "surrounding the axis L and corresponding to the disc portion 231" The outer peripheral surface 233 "and an inner peripheral surface 234" disposed opposite to the outer peripheral surface 233 ", the disk portion 231" is preset with a flow channel 235 "in the radial direction; the inner sleeve body 24" has a surrounding axis The inner annular surface 241 "formed by L has a card 242" adjacent to the receiving chamber 111 "and protruding toward the axis L, and a card ^ P 242" and opposite ^^ 242 " The accommodating portion 244 "farther from the axis L; the seal 22" is made of rubber material and is directly poured into 235 "and an outer ring portion thereof can be protruded on the perimeter surface 233", and a The inner ring is connected to the inner sleeve 24 " The outer diameter of the sealing member 22 "is larger than the outer diameter of the corresponding outer sleeve 23" of the outer casing 23 ".

The needle body 30 "is directly fixed to the needle seat 25" of the engaging seat unit 20 ", and can protrude to the outside of the injection cylinder 10". Therefore, in the fifth embodiment of the present invention, the sleeve member 21 ", the seal member 22", and the needle seat 25 "are integrated into one body, which can not only be a component β, but also be troublesome to manufacture and assemble. The body 30 "is inserted into the needle seat 25" to complete the assembly, and it is quite easy to be thin; and compared with the existing syringe, the existing rattan needle seat needs to be relatively paste with the snap seat to screw it. The purpose of reducing components and assembling Wo.

As shown in FIG. 15, it is the same as the fifth embodiment, except that the inner annular surface 541 of the inner sleeve body 54 of the engaging seat unit 50 also has a card 542 and a receiving portion 544. The card 542 is provided with a slanting shoulder 545 which is surrounded by a fiber L. The axis L of the killer 547 generated perpendicularly intersects the slanted shoulder 545. When the engagement seat unit 50 and the needle body 60 are retracted into the injection cylinder When inside, the needle body 60 is also ensured that there is no danger of exposure (similar to the state of FIG. 11).

As shown in FIG. 16, in the structures of the embodiments, the piston 42 of i¾ »40 may be a structure in which the shooting surface is fixed on the end of the pusher 40; and the end of the pusher 40 An annular convex rib 421 may be formed at the place where the piston 42 is injection-molded, so as to form a stable and reliable bonding effect.

In summary, the present invention overcomes the shortcomings of existing wealth, and has the following characteristics and advantages: 1. The seal 22 and the sleeve member 21 are decent, and the card can be directly faced inside, the structure is quite simplified, and the manufacturing and assembly of the components are also quite easy. With the elastic material characteristics of the seal 22, The assembly of the tongue 43 and the connecting portion 311 is quite smooth and surely connected.

2. The sealing member 22 and the sleeve member 21 are directly formed on the same component, and are manufactured by the same machine, and do not need special assembly, which can reduce the manufacturing assembly cost.

3. The sealing member 22 is formed on the fiber member 21, so there is no problem of assembly. It can also save Λ assembly freshness, and can use the machine to perform the assembly operation of the tree. The IJ seal 22 will not be produced. The lower the rate, the lower the probability of machine shutdown, which can improve production efficiency.

4. When assembling, it is necessary to connect the snap-in seat unit 20 and the needle group 30 into one body, and then place the snap-in seat unit 20 and the needle group 30 into the injection cylinder 10 until positioning, the assembly operation is quite easy, and the degree of assembly is fast The production capacity can be greatly improved.

5. The sealing member 22 is directly formed on the Lin member 21, which can simplify the components. With the material characteristics of the inner sleeve body 24, the tenon 43 does not need to be opened, and the structure is relatively simple. It can be used on the same machine. At the same time, complete the assembly operation with the same operation.

6. Outer body 23 and support block 236 made of polypropylene material can be used to support inner cover body 24 and seal 22 made of sickle material, which promotes the nesting of tenon 3 of 40 and the nesting unit 20 It can be combined firmly with the purpose of tightening.

To sum up ± ¾, the device of the present invention directly integrates a seal with plasticity and ¾ ^ pieces into one body, which not only can be used for the purpose of pyrimide sealing, but also can be easily manufactured and equipped, improve production capacity, and attach 氐) »Efficacy Therefore, it is indeed the purpose of the invention.

Claims

Claim

1. A device, including a ¾ iW, with a bundle tube at one end, and a through hole in the center of the bundle tube, which communicates with the internal chamber; a guess is that one end is inserted into the fiber injection chamber, and the piston beach And a tenon is provided; the clamping unit has a hollow sleeve which can be clicked ^^ Note! ^ The through hole of the bundle tube portion, and the sleeve member has an upper group ^ and a lower card formed in the hollow interior, so that the needle seat of the needle group is provided with a Hi knot to relax the aforementioned upper group, and the The lower card can be engaged with the tenon of the female rod; the head group is composed of a needle seat and a needle body, and the needle seat can be combined with the outer end of the sleeve member of the engagement seat unit;

—The seal is made of elastic material and is directly fixed on the gang cow of the engaging seat unit. The seal has an outer diameter part formed on the inner wall of the injection cylinder container.

2. A syringe as claimed in claim 1, wherein: a slanted shoulder is provided between the lower card of the sleeve member and the hollow interior.

3. The safety ¾¾f device as claimed in claim 1, characterized in that: the »piston can be a structure that is directly fixed on the end of the push rod by injection molding.

4. A ¾ ^ syringe, ^ -mm, with a bundled tube at one end, and a through hole in the center of the tube, which communicates with the internal chamber; One »One end is inserted into the S chamber, and the end of the piston is parallel A mortise is provided; the hollow-shaped fiber part of the clamping unit can be engaged with the through hole of the bundle tube part, and the sleeve part has an upper combination part formed in the hollow interior; a needle set is provided with a needle body According to the structure, the needle seat is provided with a connecting portion that can be combined with the upper group of the sleeve member, and is characterized by:

A seal is made of an elastic material and is directly formed and fixed on a sleeve member of an engagement seat unit. The seal has an outer diameter portion formed on the inner wall of the sleeve ^ and the barrel can be sealed. The seal is formed on ¾M cattle inside the lower card ^ WWF mortise card ^ i knot.

The beach device according to claim 4, characterized in that: an inclined shoulder can be provided between the lower card of the sleeve member and the hollow interior.

6. The safety device of claim 4 of claim 4, characterized in that: the plunger of the push rod can be a structure formed by injection molding ϊζϊ fixed on the end of the push rod.

7. A ^ ¾ device, ^ -mm, with a bundle tube at one end, and a through hole in the center of the bundle tube, which communicates with the internal chamber; a push rod lives in the injection chamber by one end of the piston. The end is also provided with a tenon; a snap-in seat unit with a hollow sleeve member can snap a through hole of the bundle tube portion; ~ the head group is composed of a needle body, and the needle seat can be used to set the sleeve of the snap-in seat unit The outer end of the tube; it is characterized by:

A seal is made of elastic material and is directly formed and fixed on the sleeve member of the engaging seat unit. The seal has a shape formed on the inner wall of the container ¾ # ^ 部可密 ^ i¾ ii; ¾ of the upper and lower clips inside the ¾ piece, so that the needle The needle seat of the head group is provided with a connecting part for the aforementioned upper card, and the lower card can be used as a tenon of a rod ^ ¾ knot.

8. The device according to claim 7, characterized in that: an inclined shoulder can be provided between the lower card of the sleeve member and the hollow interior.

9. The device of claim 7 according to claim 7, wherein the plunger of the push rod can be an injection molded square 5tt and fixed on the end of the push rod.

10. A syringe comprising a syringe barrel with a bundle tube portion at one end thereof, the central portion of the bundle tube portion having a through hole communicating with the internal container chamber; and one end of the piston tube being inserted into the S container chamber by the end of the piston. A mortise is provided; "^ The seat unit is provided with a hollow sleeve member that can be inserted into the through hole of the fiber tube; the head group is composed of a needle body, and the needle seat can be used to form a sleeve of the unit. The outer end of the tube; it is characterized by:

A sealing member, which is an elastic material, is directly fixed on the sleeve member of the engaging seat unit, and has a diameter portion formed on the fiber portion and can be closely adhered to the inner wall of the injection container housing; The internal thread section and the lower engaging part of the sleeve member, so that the needle seat of the needle set is provided with an external thread section to be assembled ^ ^{1 The} aforementioned internal thread section, and the lower engaging part can be a rod tenon clamp ^ ¾ knot .

11. The safety syringe according to claim 10, wherein: an inclined shoulder portion is provided between the lower engaging portion of the sleeve member and the hollow interior.

12. The ¾ ^ syringe according to claim 10, characterized in that: «the piston of the rod can be a structural form which is directly fixed on the receiving end by injection molding.

13. A device comprising a note, one end of which is provided with a bundle tube portion, and a central hole of the tube portion is provided with a through hole communicating with the internal chamber; one end is ¾ β in the surface cylinder chamber, and one end of the piston is provided with a A tenon; a snap-in seat unit with a hollow crane piece that can snap through the through-hole of the bundle tube; the head set is composed of a needle body, wherein the pin seat integrally forms the outer end of the sleeve member of the snap-in unit; Features are:

A seal is made of elastic material and is directly formed and fixed on the sleeve member of the engaging seat unit. The seal has a position formed on the outer wall of the inner wall of the container. The seal is formed on the sleeve. The lower card inside the piece can be locked with a tenon.

14. The safety syringe according to claim 13, wherein an inclined shoulder is provided between the lower engaging portion of the sleeve member and the hollow interior.

15. The device of claim ¾ ^ ¾¾) "according to claim 13, characterized in that: the piston of the» can be an injection molding square ϊζ¾ fixedly fixed on the end of the push rod.