CN100438934C - Injection needle withdrawing tilting structure - Google Patents
Injection needle withdrawing tilting structure Download PDFInfo
- Publication number
- CN100438934C CN100438934C CNB2005100631160A CN200510063116A CN100438934C CN 100438934 C CN100438934 C CN 100438934C CN B2005100631160 A CNB2005100631160 A CN B2005100631160A CN 200510063116 A CN200510063116 A CN 200510063116A CN 100438934 C CN100438934 C CN 100438934C
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- Prior art keywords
- push rod
- elastic arm
- injection needle
- needle base
- chamber portion
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Abstract
The present invention relates to an injection needle withdrawing and tilting structure. An injection needle seat arranged in the outer cylinder of an injection needle cylinder is provided with a clamping groove, a window hole and an elastic arm with a convex foot. The front end of a push rod inserted in the outer cylinder is provided with a buckling ring part which is arranged in the position where the front end of the push rod enters the cylinder cavity part of the injection needle seat. The end face of an annular rib for arranging a piston on the push rod pushes the convex foot of the elastic arm, which makes the elastic arm bend to the central direction of the window hole, and the buckling ring part is embedded in the clamping groove. The injection needle seat and the injection needle on the injection needle seat retract into the inner cavity of the outer cylinder in the position where the push rod is pulled back. The convex foot pushes the end face of the annular rib through the self-rebound force of the elastic arm. The injection needle seat forms an inclined state in the cavity of the injection needle cylinder, and the tip of the injection needle is offset from the position near the inner wall of the outer cylinder. Therefore, after the injection needle retracts to the inner cavity of the outer cylinder, the danger that after the push rod retracts and is pushed forward accidentally to make the needle tip revealed outside the injection needle cylinder to puncture medical personnel can be avoided.
Description
Technical field
The invention relates to a kind of retraction structure, refer in particular to and be used in retraction type safety syringe, make used injection needle restoring enter behind the syringe cylinder inner chamber, take precautions against the unexpected effect of hurting sb.'s feelings of protruding of entry needle and have automatically with the needle point biasing of entry needle.
Background technology
The composition of general injection tube comprises the urceolus and a push rod of a hollow structure.Wherein this urceolus one end can combine with entry needle, and this urceolus inside can supply ccontaining medicinal liquid.This push rod one termination is provided with a piston portion and is inserted in this outer tube inner chamber, and the other end exposes this urceolus.So promote this push rod, but the mat piston portion is released medicinal liquid at the syringe needle that comes on this urceolus one end.
Because general syringe cylinder there is no the function of taking in this entry needle, is enclosed within outside this entry needle so pin must be covered back, then this entry needle is taken off again.In above-mentioned action, must carefully return this pin lid of cover, then can produce if having accidentally by the situation of needle sting.
The Taiwan patent announcement discloses a kind of structure of high-safety injection tube for No. 394027, mainly is to set by a needle body in urceolus inside to be installed in the syringe needle group that a needle handle is constituted.Wherein, this needle handle bottom surface forms the different fastener of both sides height, and these two relative fastener centers form a hole portion, and this hole portion inner edge is made and colluded columnar structure.The set piston body end face of this push rod is established a coalition, and this push rod is pushed this syringe needle group to and can be made this coalition enter this hole portion and this to collude columnar structure and form to collude and close.Move back this push rod and this syringe needle group can be drawn in this urceolus inside along with drawing, and utilize not contour fastener and abutting against of this piston face can make this syringe needle group inclination.
Because this needle handle periphery is successive wall, and this hole portion inner edge forms again and colludes columnar structure, so this needle handle wall is not had an ability of elastic shrinkage, therefore coalition enter this hole portion with this collude columnar structure formation collude fashionable, not contour fastener will certainly support end this coalition and stop coalition to continue to advance, and is like this then close disabler with colluding of hole portion.Therefore, the contact surface of this coalition and needle handle fastener in this case, must be one to have end face as the flexible contractile function of piston body, utilize the characteristic of the elastic shrinkage of this piston body in view of the above, make not contour this piston body of fastener pushing and pressing compression, utilize the deflection of its elastic shrinkage to hold fastener, use to finish and collude the action of closing.
But it is well-known, being seen on the market at present syringe cylinder, its piston elastomer might not be contained the front end face to piston fully, still have many syringe cylinders, its piston elastomer only terminates in the outer surface that contacts with the syringe cylinder inner chamber, and in the front end face of piston, it is the hard plastics that is exposing an ejection formation, thus, in the technology that this case proposed, this highly higher fastener can't further make this coalition combine with hole portion when at first being supported on the hard plastics terminate in this ejection formation at all, so then push rod can't collude with the syringe needle group at all and close and make the syringe needle group bounce back to outer tube inner chamber, constitutes the inefficacy of retraction mechanism.
Summary of the invention
Main purpose of the present invention is to provide a kind of injection needle withdrawing tilting structure, when especially injection needle restoring can be contained in the inner chamber of this syringe cylinder, automatically the needle point of entry needle is setovered, to reach the effect that safer acupuncture accident is taken precautions against.
Another object of the present invention is to provide a kind of injection needle withdrawing tilting structure, especially go for the piston of any style, no matter whether the piston elastomer contains the front end face to piston, push rod front end and injecting needle base all have the buckle function, use and guarantee that entry needle is placed to the retraction function of the inner chamber of this syringe cylinder.
The object of the present invention is achieved like this:
A kind of injection needle withdrawing tilting structure, it has entry needle, injecting needle base and push rod; It is characterized in that: the tube chamber portion internal face system of an injecting needle base that is set in the urceolus inside of a syringe cylinder is provided with on the circumferential wall of a draw-in groove and tube chamber portion and offers a fenestra, utilize the part tube cavity between this fenestra and this chamber root edge to form at least one elastic arm that has protruding foot, and the push rod front end that is plugged in this urceolus is provided with the buckle ring portion; Enter the position of the tube chamber portion of this injecting needle base at this push rod front end, the end face of the circumferential rib of device piston pushes the protruding foot of this elastic arm on this push rod, makes the center position bending of this elastic arm to this fenestra, and this buckle ring portion and this draw-in groove are chimeric; In the position that retracts this push rod, entry needle on this injecting needle base and the seat together bounces back and enters this outer tube inner chamber, make the end face of this protruding foot pushing and pressing circumferential rib by this elastic arm oneself's resilience force, this injecting needle base presents heeling condition at the intracavity of syringe cylinder, and the needle point of this entry needle is offset to the position near outer tube inner wall.
It is configured to: it has an injecting needle base and a push rod to be provided in the urceolus inside of a syringe cylinder, and this injecting needle base one end is small end and combines with an entry needle, and the other end is big end and is the tube chamber portion of hollow, and this retraction structure includes:
One fenestra is opened in the tube chamber portion of this injecting needle base;
At least one elastic arm is arranged at the side of this fenestra, and an end of this elastic arm is a stiff end, and the other end is a free end;
At least one protruding foot is arranged on the free end of this elastic arm; The free end that this protruding foot is the own elasticity arm begins, and extends axially a length and constitutes towards deviating from a direction of chamber portion;
One draw-in groove is arranged on the inwall of tube chamber portion of this injecting needle base;
One circumferential rib is arranged on the front end of push rod, and the front end of circumferential rib has a post portion, and the front end of this post portion is provided with a buckle ring portion;
Its combinative structure is: the front end at push rod enters this chamber portion position, and this circumferential rib pushes the protruding foot of this elastic arm, makes the center position bending of this elastic arm to this fenestra, and this buckle ring portion and this draw-in groove fastening; The retracted position of pulling out at push rod, this injecting needle base and entry needle are because of the snap effect of the draw-in groove of the buckle ring portion of push rod and this injecting needle base, together drawn in this outer tube inner chamber, the buckle ring portion of this push rod and the buckle of this draw-in groove form monolateral fulcrum, and the resilience force of this elastic arm forms the axial thrust of pointing to circumferential rib, under these two conditions, this injecting needle base presents heeling condition in the retraction back at the urceolus intracavity of syringe cylinder, and the needle point of this entry needle is offset to the position near outer tube inner wall.
Draw-in groove on the described tube chamber portion inwall that is arranged on injecting needle base forms one-sided buckle with a buckle ring portion of this push rod front end.
Draw-in groove and this fenestra of the tube chamber portion of described injecting needle base are located at opposite face, and the side in this fenestra is established an elastic arm, the barrel of the stiff end of this elastic arm and this chamber portion fuses, the other end be free end and with the barrel of this chamber portion apart from one another by not linking to each other.
Draw-in groove and this fenestra of the tube chamber portion of described injecting needle base are located at opposite face, and establish two relative elastic arms in a side of this fenestra, the stiff end of these two elastic arms all fuses with the barrel of this chamber portion, and the other end of these two elastic arms is a free end, and these two free ends are apart from one another by not linking to each other.
The present invention has following actively useful effect:
Injecting needle base of the present invention offers a fenestra, and establishes at least one elastic arm that has protruding foot, utilizes the elastic-restoring force that this elastic arm produces and the pushing and pressing effect of protruding foot, and makes this injecting needle base produce inclination after entering the middle section position of this urceolus.So can make the entry needle that is connected this injecting needle base produce the effect of needle point biasing, reach better function of safety protection.In addition, because this elastic arm can be out of shape voluntarily, therefore no matter whether the soft body of the set piston of various push rod contains the front end face of shape ring rib, this push rod all can with joint seat buckle hook joint, and outside this push rod drawing joint seat enters during tube inner chamber, utilize the rebound effect and the set circumferential rib formation passing of push rod of elastic arm, and force joint seat and entry needle to present heeling condition at the intracavity of syringe cylinder, the needle point of entry needle is offset near outer tube inner wall, can avoids being pushed the acupuncture danger that makes needle point be exposed to the syringe cylinder outside and jeopardize medical personnel forward by accident again behind the push rod retraction.
Description of drawings
Fig. 1 is the exploded view of one embodiment of the invention.
Fig. 2 is a combinative structure sketch map embodiment illustrated in fig. 1.
Fig. 3 is the outside drawing of elastic arm one embodiment that injecting needle base is used among Fig. 1.
Fig. 4 is the outside drawing of another embodiment of elastic arm that injecting needle base is used among Fig. 1.
Fig. 5 is a user mode generalized section embodiment illustrated in fig. 1.
Fig. 6 is a user mode cross-sectional view embodiment illustrated in fig. 1.
Fig. 7 is that entry needle embodiment illustrated in fig. 1 is captured in the structural representation in the urceolus.
Fig. 8 is the exploded view of another embodiment of the present invention.
Fig. 9 is a combinative structure sketch map embodiment illustrated in fig. 8.
Figure 10 is the outside drawing of injecting needle base embodiment illustrated in fig. 8.
Figure 11 is the outside drawing of another injecting needle base embodiment illustrated in fig. 8.
Figure 12 is a user mode generalized section embodiment illustrated in fig. 8.
Figure 13 is a user mode generalized section embodiment illustrated in fig. 8.
Figure 14 is that entry needle embodiment illustrated in fig. 8 is captured in the structural representation in the urceolus.
The specific embodiment
Accompanying drawing number
10, urceolus 12, front position 14, back-end location 16, the tube wing
18, middle section position 20, push rod 22, circumferential rib 24, post portion
30, injecting needle base 32, protrusion tubule 34, tube chamber portion 36, embedded hole
40, entry needle 50, pin lid 62, buckle ring portion 64, fitting projection
66, draw-in groove 68, fenestra 70, urceolus 72, elastic arm
74, spacing 76, protruding foot 78, middle section position 80, push rod
82, circumferential rib 84, post portion 90, injecting needle base 92, protrusion tubule
94, tube chamber portion 100, buckle ring portion 110, fitting projection 120, embedded hole
130, draw-in groove 140, fenestra 150, elastic arm 160, protruding foot
170, elastic arm 180, protruding foot
Please refer to Fig. 1 to Fig. 7, the present invention is a kind of injection needle withdrawing tilting structure, and it has entry needle 40, injecting needle base 30 and push rod 20; The tube chamber portion 34 internal face systems of an injecting needle base 30 that is set in urceolus 10 inside of a syringe cylinder are provided with on the circumferential wall of a draw-in groove 66 and tube chamber portion 34 and offer a fenestra 68, utilize the part tube cavity between this fenestra 68 and this chamber root edge to form at least one elastic arm 72 that has protruding foot 76, and push rod 20 front ends that are plugged in this urceolus 10 are provided with buckle ring portion 62; Enter the position of the tube chamber portion 34 of this injecting needle base 30 at these push rod 20 front ends, the end face of the circumferential rib 22 of device piston pushes the protruding foot 76 of this elastic arm 72 on this push rod 20, make of the center position bending of this elastic arm 72, and this buckle ring portion 62 is chimeric with this draw-in groove 66 to this fenestra 68; In the position that retracts this push rod 20, entry needle 40 on this injecting needle base 30 and the seat together bounces back and enters this urceolus 10 inner chambers, make the end face of these protruding foot 76 pushing and pressing circumferential ribs 22 by this elastic arm 72 oneselfs' resilience force, this injecting needle base 30 presents heeling condition at the intracavity of syringe cylinder, and the needle point of this entry needle 40 is offset to the position near urceolus 10 inwalls.
Below to the specific descriptions of doing embodiment illustrated in fig. 1: the injecting needle base 30 that inside set and the push rod 20 that are arranged on the urceolus 10 of a syringe cylinder, wherein these injecting needle base 30 1 ends are small end and combine with an entry needle 40, the other end is big end and is the tube chamber portion 34 of hollow, end is equipped with a buckle ring portion 62 before this push rod 20, and this retraction structure includes:
One fenestra 68 is opened in the tube chamber portion 34 of this injecting needle base 30;
At least one elastic arm 72 is arranged at the side of this fenestra 68, and an end of this elastic arm 72 is stiff end, and the other end is a free end;
At least one protruding foot 76 is arranged on the free end of this elastic arm 72; The free end that this protruding foot 76 is own elasticity arms 72 begins, and extends axially a length and constitutes towards deviating from a direction of chamber portion 34;
One draw-in groove 66 is provided in a side of on the inwall of tube chamber portion 34 of this injecting needle base 30;
One circumferential rib 22 is arranged on the front end of this push rod 20; The front end of circumferential rib has a post portion 24, and the front end of this post portion 24 is provided with a buckle ring portion 62;
Take this, when the front end of this push rod 20 entered this chamber portion 34, then circumferential rib 22 pushed the protruding foot 76 of this elastic arm, made the center position bending of this elastic arm 72 to this fenestra 68, and this buckle ring portion 62 fastens with this draw-in groove 66; And when pulling out push rod 20 again, then this injecting needle base 30 and entry needle 40 can be because of the buckle ring portion 62 of push rod 20 and the snap effect of the draw-in groove 66 of this injecting needle base 30, and together drawn in the inner chamber of this urceolus 10, and form monolateral fulcrum by the buckle ring portion 62 of push rod 20 and the buckle of this draw-in groove 66, and the resilience force of this elastic arm forms the axial thrust of pointing to circumferential rib 22, under these two conditions, make this injecting needle base 30 behind retraction, be formed inclination, this injecting needle base 30 presents heeling condition in the retraction back at the intracavity of the urceolus 10 of syringe cylinder, and the needle point of this entry needle 40 is offset near the position of urceolus 10 inwalls sees Fig. 7.
Please refer to Fig. 2, the one-sided draw-in groove 66 that is provided with in the tube chamber portion 34 of described injecting needle base 30 has a buckle ring portion 62 to form one-sided buckle with the front end of this push rod 20.
Please refer to Fig. 4, the draw-in groove 66 of the tube chamber portion 34 of described injecting needle base 30 is located at opposite face with this fenestra 68, and establish an elastic arm 72 in a side of this fenestra 68, the barrel of the stiff end of this elastic arm 72 and this chamber portion 34 fuses, and the other end is free end and does not link to each other at interval with the tunnel wall type of this chamber portion 34.
In the embodiment shown in fig. 3, the draw-in groove 66 of the tube chamber portion 34 of described injecting needle base 30 is located at opposite face with this fenestra 68, and establish two relative elastic arms 72 in a side of this fenestra 68, the stiff end of these two elastic arms 72 all fuses with the barrel of this chamber portion 34, and the other end of these two elastic arms 72 is a free end, and free end is apart from one another by not linking to each other.
The protruding foot 76 of described elastic arm 72 is that own elasticity arm 72 free ends begin, and extends axially length formation towards deviating from a direction of chamber portion 34.
Now for a more detailed description to structure of the present invention:
Disclose a syringe cylinder among Fig. 1, Fig. 2 and comprise a urceolus 10, a push rod 20, an injecting needle base 30; 40 groups of ends that are located at this injecting needle base 30 of another entry needle, and pin lid 50 is in order to be enclosed within outside this entry needle 40.
Above-mentioned urceolus 10 is hollow column jackets, and its inner chamber is constructed near the cavity that front position 12 forms a multistage diameter, and the back-end location 14 of inner chamber is provided with a wing 16.
This injecting needle base 30 be the group be located at the front position 12 of this urceolus 10, and utilize this front position 12 multistage diameter chamber body structure restriction and do not deviate from.End at this push rod 20 is provided with a circumferential rib 22, be equipped with piston outside this circumferential rib 22, and this circumferential rib 22 is plugged on this urceolus 10 inside.Promote 20 these circumferential ribs 22 of this push rod and rely on this injecting needle base 30.
Illustrate further, circumferential rib 22 front ends of this push rod 20 more form a post portion 24.Front end in this post portion 24, its periphery are provided with a buckle ring portion 62, with and the end be provided with a fitting projection 64.
This injecting needle base 30 comprises and being used for and this entry needle 40 bonded protrusion tubules 32, and protrudes with this that tubule 32 links and be a chamber portion 34 of hollow structure.This protrudes tubule 32, this chamber portion 34 and these entry needle 40 internal communication.
Please refer to Fig. 3, Fig. 4, Fig. 5, Fig. 6, wherein, this Fig. 3 is the embodiment of this case, discloses and forms an embedded hole 36 in protrusion tubule 32 bottoms of this injecting needle base 30, offers a draw-in groove 66 at the internal face of this chamber portion 34; And on the wall body of this chamber portion 34, offer a fenestra that runs through 68.Two elastic arms 72 relatively are formed on an end of this fenestra 68, has a spacing 74 between these two elastic arms 72, and the free end of each elastic arm 72 is formed with protruding foot 76, this elastic arm 72 is to utilize the partial volume between this fenestra 68 and this chamber portion 34 root edges to constitute, and the root edge of this protruding foot 76 protrudes from the root edge of this chamber portion 34.Also can use elastic arm shown in Figure 4 during enforcement.
Please refer to Fig. 5, Fig. 6, be illustrated in when injection is approaching to be finished, this push rod 20 pushes this urceolus 10 inside more, then this post portion 24 can enter this chamber portion 34, this moment, this fitting projection 64 was chimeric with this embedded hole 36, and the front end face of this circumferential rib 22 pushes this elastic arm 72 to these fenestra 68 center position bendings.This buckle ring portion 62 snaps in this draw-in groove 66 (as shown in Figure 6) again.
When then this push rod 20 outwards being pulled back, because the snap effect of buckle ring portion 62 and this draw-in groove 66 makes push rod 20 can spur the inner chamber 18 that these injecting needle base 30 retractions enter injection tube.It should be noted that when injecting needle base 30 bounces back to the middle section position 18 of this urceolus 10, because of the intracavity diameter of middle section position 18 is bigger, and the spatial accommodation that makes injecting needle base 30 be obtained to tilt.For another shown in Figure 7, when finishing in injection operation is approaching by known this elastic arm 72 of aforementioned content, promptly the protruding foot 76 because of this injecting needle base 30 is pushed by the circumferential rib 22 of push rod 20, and make this elastic arm 72 bendings, so when these injecting needle base 30 retractions of push rod 20 pullings enter the inner chamber 18 of injection tube, because the buckle ring portion 62 of push rod 20 forms monolateral fulcrum with the buckle of this draw-in groove 66, and the axial thrust of circumferential rib 22 form is pointed in self resilience of this elastic arm 72, as shown in Figure 7, this injecting needle base 30 is utilized the space of middle section position 18 and is tilted under above-mentioned two conditions.
Please refer to Fig. 8, Fig. 9, illustrate another kind of syringe cylinder structure, include a urceolus 70, a push rod 80 substantially, and an injecting needle base 90.The structure of this urceolus 70 and last example structure shown in Figure 1 are suitable, and circumferential rib 82 front ends of this push rod 80 are provided with post portion 84, and the end of this post portion 84 is provided with a buckle ring portion 100 and a fitting projection 110 again.This push rod 80 is plugged on this urceolus 70 inside, and the assembly group of this injecting needle base 90 and an entry needle 40 is located at this urceolus 70 1 ends.
Please refer to Figure 10, illustrate these injecting needle base 90 1 ends and be provided with a protrusion tubule 92, the other end forms a chamber portion 94.Wherein the root of this protrusion tubule 92 is provided with an embedded hole 120; And this chamber portion 94, wall is provided with a draw-in groove 130 within it, and on the wall body of tube chamber portion 94, offer a fenestra 140, one elastic arm 150 is to utilize the partial volume between this fenestra 140 and this chamber portion 94 root edges and constitute, and the free end of this elastic arm 150 forms a protruding foot 160, and the root edge of this protruding foot protrudes than the root edge of this chamber portion 94.
Please refer to Figure 11, illustrate the structure of another injecting needle base 90, it is suitable with structure shown in Figure 10, and difference is in an end of this fenestra 140 and is provided with two relative elastic arms 170 that have protruding foot 180, and this protruding foot 180 is respectively formed at the free end of this elastic arm 170.
Please refer to Figure 12 and Figure 13; Diagram is when injection, the front end of push rod 20 is pushed into the tube chamber portion 94 of this injecting needle base 90, this fitting projection 110 is chimeric with this embedded hole 120,100 of this buckle ring portions are stuck in this draw-in groove 130, this circumferential rib 82 pushes this protruding foot 160 simultaneously, makes this elastic arm 150 towards these fenestra 140 interior direction bendings.
Then, please refer to Figure 14, when diagram is outwards pulled back this push rod 80, because the snap effect of buckle ring portion 82 and this draw-in groove 130 makes push rod 80 can spur the inner chamber that these injecting needle base 90 retractions enter injection tube 70.It should be noted that when injecting needle base 90 to bounce back to when being the inner chamber of this injection tube 70, so intracavity diameter is bigger, and the spatial accommodation that makes injecting needle base 90 be obtained to tilt; Known for another aforementioned content, when this elastic arm 150 is finished in injection operation is approaching, promptly pushed by the circumferential rib 82 of push rod 80 because of this protruding foot 160, and make this elastic arm 150 bendings, so when these injecting needle base 90 retractions of push rod 80 pullings enter the inner chamber of injection tube 70, because the buckle ring portion 82 of push rod 80 forms monolateral fulcrum with the buckle of this draw-in groove 130, and the axial thrust of circumferential rib 82 form is pointed in self resilience of this elastic arm 150, under above-mentioned two conditions, this injecting needle base 90 is utilized the intracavity space of injection tube 70 and is tilted, as shown in figure 14.
More than be preferred embodiment of the present invention and design graphic, only preferred embodiment and designing graphicly only illustrates, it is not the interest field that is used to limit the technology of the present invention, all with equalization technological means or be the interest field that contained of the application's claim content and implementer, all do not break away from category of the present invention and be the application's interest field.
Claims (4)
1. injection needle withdrawing tilting structure, be to set an injecting needle base and a push rod in the urceolus inside of syringe cylinder, it is characterized in that: this injecting needle base one end is small end and combines with an entry needle, and the other end is big end and is the tube chamber portion of hollow, and this retraction structure includes:
One fenestra is opened in the tube chamber portion of this injecting needle base;
At least one elastic arm is arranged at the side of this fenestra, and an end of this elastic arm is a stiff end, and the other end is a free end;
At least one protruding foot is arranged on the free end of this elastic arm; The free end that this protruding foot is the own elasticity arm begins, and extends axially a length and constitutes towards deviating from a direction of chamber portion;
One draw-in groove is arranged on the inwall of tube chamber portion of this injecting needle base;
One circumferential rib is arranged on the front end of push rod, and the front end of circumferential rib has a post portion, and the front end of this post portion is provided with a buckle ring portion;
When the front end of push rod entered this chamber portion, this circumferential rib pushed the protruding foot of this elastic arm, made the center position bending of this elastic arm to this fenestra, and this buckle ring portion and this draw-in groove fastening; When pulling out this push rod, this injecting needle base and entry needle are because of the snap effect of the draw-in groove of the buckle ring portion of push rod and this injecting needle base, together drawn in this outer tube inner chamber, the buckle ring portion of this push rod and the buckle of this draw-in groove form monolateral fulcrum, and the resilience force of this elastic arm forms the axial thrust of pointing to circumferential rib, under these two conditions, this injecting needle base is formed heeling condition behind retraction.
2. injection needle withdrawing tilting structure as claimed in claim 1 is characterized in that: the draw-in groove on the described tube chamber portion inwall that is arranged on injecting needle base forms one-sided buckle with the buckle ring portion of this push rod front end.
3. injection needle withdrawing tilting structure as claimed in claim 1, it is characterized in that: draw-in groove and this fenestra of the tube chamber portion of described injecting needle base are located at opposite face, and the side in this fenestra is established an elastic arm, the barrel of the stiff end of this elastic arm and this chamber portion fuses, and the other end is free end and does not link to each other at interval with the tunnel wall type of this chamber portion.
4. injection needle withdrawing tilting structure as claimed in claim 1, it is characterized in that: draw-in groove and this fenestra of the tube chamber portion of described injecting needle base are located at opposite face, and establish two relative elastic arms in a side of this fenestra, the stiff end of these two elastic arms all fuses with the barrel of this chamber portion, and the other end of these two elastic arms is a free end, and described free end is apart from one another by not linking to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100631160A CN100438934C (en) | 2005-04-04 | 2005-04-04 | Injection needle withdrawing tilting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100631160A CN100438934C (en) | 2005-04-04 | 2005-04-04 | Injection needle withdrawing tilting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1846798A CN1846798A (en) | 2006-10-18 |
| CN100438934C true CN100438934C (en) | 2008-12-03 |
Family
ID=37076677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100631160A Expired - Fee Related CN100438934C (en) | 2005-04-04 | 2005-04-04 | Injection needle withdrawing tilting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100438934C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6066115A (en) * | 1999-07-19 | 2000-05-23 | Chang Lai; Yu-Hau | Safety syringe |
| CN2423897Y (en) * | 2000-02-24 | 2001-03-21 | 王希平 | Self-destroyed safety syringe |
| US6488656B1 (en) * | 2001-05-24 | 2002-12-03 | Wen-Ying Wu | Safety syringe |
| US6592555B1 (en) * | 2000-06-23 | 2003-07-15 | Wang Wen-Pi | Syringe device |
| US20040186427A1 (en) * | 2002-01-28 | 2004-09-23 | Pok Geo Seong | Safety syringe |
-
2005
- 2005-04-04 CN CNB2005100631160A patent/CN100438934C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6066115A (en) * | 1999-07-19 | 2000-05-23 | Chang Lai; Yu-Hau | Safety syringe |
| CN2423897Y (en) * | 2000-02-24 | 2001-03-21 | 王希平 | Self-destroyed safety syringe |
| US6592555B1 (en) * | 2000-06-23 | 2003-07-15 | Wang Wen-Pi | Syringe device |
| US6488656B1 (en) * | 2001-05-24 | 2002-12-03 | Wen-Ying Wu | Safety syringe |
| US20040186427A1 (en) * | 2002-01-28 | 2004-09-23 | Pok Geo Seong | Safety syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1846798A (en) | 2006-10-18 |
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