CN201791195U

CN201791195U - Safe self-destructive type syringe

Info

Publication number: CN201791195U
Application number: CN2010202964441U
Authority: CN
Inventors: 陈道申
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-19
Filing date: 2010-08-19
Publication date: 2011-04-13
Anticipated expiration: 2020-08-19

Abstract

The utility model discloses a safe self-destructive type syringe which is characterized in that an inner needle stand is arranged in a cylinder neck of a cylinder body and comprises an inner needle stand column and an outer needle stand ring body, the lower part of the inner needle stand column is connected with the lower part of the outer needle stand ring body, the inner needle stand column is positioned at the center position of the outer needle stand ring body, a clearance is formed between the inner needle stand column and the outer needle stand ring body, a needle head with an international standard is in sleeve joint outside the inner needle stand column, an inner cavity of the inner needle stand column is hollow, and two stop fins with symmetrical distribution are formed at the position of an upper opening of the inner needle stand column. The product has reasonable integral structure and skillful design concept, and a self-destructive mechanism has stable working effect. When a self-locking mechanism is triggered, the required thrust force is smaller than 5N. The utility model can completely realize one-handed operation. In actual use, the residual quantity of liquor is low. Compared with the prior art, the utility model has outstanding substantial characteristics and obvious progress.

Description

A kind of safety self-destructing syringe

Technical field:

This utility model relates to technical field of medical, a kind of specifically safety self-destructing syringe, particularly its mechanical connecting structure.

Background technology:

Documents, the patent No.: 200720058792.3, notification number: CN201067564, patentee: Luo Songneng, this case discloses a kind of " steel needle retractable safety self-destructing syringe ", and it comprises injection tube, the outer needle stand that is connected with the injection tube top, is positioned at the injection rod of injection tube and places the vertical plug of injection rod, the top of injection rod penetrates described plug, interior needle stand is set, and interior needle stand places outer needle stand and passes outer needle stand, and draw point is installed on the interior needle stand; Be provided with the agnail awl in the lower end of interior needle stand, be provided with interior snap ring on the top of injection rod, agnail awl and interior snap ring are for being clasped; Be provided with the card bulge loop on the periphery wall of interior needle stand, the internal perisporium of needle stand is provided with the card groove outside, and card bulge loop and card groove are for being clasped.

There are many unreasonable parts on the existing safety self-destructing syringe structure, for example, when self-destructor triggers, need very big thrust, can't realize one-handed performance, self-destructor stability is not good, maloperation appears easily, in addition, all there is the big shortcoming of medicinal liquid residual quantity in existing safety self-destructing syringe, so still need the structure of existing safety self-destructing syringe is further improved.

The utility model content:

The purpose of this utility model is to provide a kind of safety self-destructing syringe, it adopts interior needle stand self-locking structure, after self-destructor triggers, core bar and whole needle section can realize locked fully, product structure is reasonable, stable working state, the medicinal liquid residual quantity is low, has overcome the shortcoming and defect that exists in the prior art.

To achieve these goals, the technical solution of the utility model is: a kind of safety self-destructing syringe, it mainly comprises cylindrical shell, be provided with core bar in the cylindrical shell, the end of cylindrical shell is provided with the international standard syringe needle, the international standard syringe needle is socketed with sheath outward, the core bar place is socketed with annular plug, it is characterized in that: be provided with interior needle stand in the tube neck of described cylindrical shell, interior needle stand is made of interior needle stand post and outer needle stand ring body, interior needle stand post bottom is connected with outer needle stand ring body bottom, interior needle stand post is positioned at the centre bit of outer needle stand ring body, form the gap between interior needle stand post and the outer needle stand ring body, the international standard pinhead sleeve is connected on interior needle stand post outside, interior needle stand post inner chamber hollow, interior needle stand post upper shed place forms the spacing fin of two symmetrical distributions, forming the cross section between two spacing fins is trapezoid interval, the width at top, trapezoidal interval is less than the diameter of interior needle stand post inner chamber, be provided with linear retaining spare in the tube neck of interior needle stand bottom, the two ends of linear retaining spare are stuck in a neck inwall place, and the middle part of linear retaining spare forms hemizonid, and hemizonid is over against interior needle stand post inner chamber under shed, the end of core bar forms the joint pin of pulling back, and the joint pin of pulling back is provided with the ring seal draw-in groove near vertical outer wall place.

The utility model discloses a kind of safety self-destructing syringe, the product reasonable integral structure, design concept is ingenious, self-destructor work effect stability, when self-locking mechanism triggered, required thrust was less than 5 Ns, can be completely achieved one-handed performance, in actual use, the medicinal liquid residual quantity is low, has outstanding substantive distinguishing features and marked improvement compared to existing technologies.

Description of drawings:

Fig. 1 is this utility model structural representation

Fig. 2 is the partial enlarged drawing of Fig. 1

Fig. 3 is this utility model imbibition view

Fig. 4 is this utility model injection completion status sketch map

Fig. 5 is the partial enlarged drawing of Fig. 4

Fig. 6 is this utility model safety self-destruct view

Fig. 7 is this utility model general assembly drawing

Fig. 8 is this utility model core bar structure sketch map

Fig. 9 is this utility model tube structure sketch map

Figure 10 is this utility model annular plug structural representation

Figure 11 is the linear retaining spare structural representation of this utility model

Figure 12 is the linear retaining spare axonometric chart of this utility model

Figure 13 is a needle stand structural representation in this utility model

Figure 14 is a needle stand profile in this utility model

Figure 15 is a needle stand axonometric chart in this utility model

Figure 16 is this utility model cylindrical shell profile

The specific embodiment:

With reference to the accompanying drawings, this utility model further is described

This utility model is a kind of safety self-destructing syringe, it mainly comprises cylindrical shell 1, be provided with core bar 2 in the cylindrical shell 1, the end of cylindrical shell 1 is provided with international standard syringe needle 3, the international standard syringe needle 3 outer sheaths 4 that are socketed with, core bar 2 places are socketed with annular plug 13, it is characterized in that: needle stand 6 in being provided with in the tube neck 5 of described cylindrical shell 1, interior needle stand 6 is made of interior needle stand post 7 and outer needle stand ring body 8, interior needle stand post 7 bottoms are connected with outer needle stand ring body 8 bottoms, interior needle stand post 7 is positioned at the centre bit of outer needle stand ring body 8, form gap 9 between interior needle stand post 7 and the outer needle stand ring body 8, international standard syringe needle 3 is socketed in interior needle stand post 7 outsides, interior needle stand post 7 inner chamber hollows, interior needle stand post 7 upper sheds place form the spacing fin 10 of two symmetrical distributions, forming the cross section between two spacing fins 10 is trapezoid interval, the width at top, trapezoidal interval is less than the diameter of interior needle stand post 7 inner chambers, be provided with linear retaining spare 11 (linear retaining spare has elasticity) in the tube neck 5 of interior needle stand 6 bottoms, the two ends of linear retaining spare 11 are stuck in a neck 5 inwall places, the middle part of linear retaining spare 11 forms hemizonid 12, hemizonid 12 is over against interior needle stand post 7 inner chamber under sheds, the end of core bar 2 forms the joint pin 14 of pulling back, and the joint pin 14 of pulling back is provided with ring seal draw-in groove 15 near vertical outer wall place.

Described outer needle stand ring body 8 inwalls are provided with female thread 16, outer needle stand ring body 8 outer walls are evenly distributed with spacing block set 17 longitudinally, outer needle stand ring body 8 outer walls are provided with sealing ring position limiting convex ring 18 near the place, bottom, outer needle stand ring body 8 outer walls are socketed with annular seal ring 19, and annular seal ring 19 is positioned at sealing ring position limiting convex ring 18 tops.

In the specific implementation, described joint pin 14 bottoms of pulling back form circular step 20, and the diameter of circular step 20 is greater than the diameter of hemizonid 12, and it is cylindric or hemispherical that the end of the joint pin 14 of pulling back becomes.

In the specific implementation, the cross section of described ring seal draw-in groove 15 shape in echelon.

In the specific implementation, a spacing that neck 5 inwall places vertically are evenly distributed with between 21, two retaining convex ribs 21 of retaining convex rib that cooperatively interact with spacing lug 17 of described cylindrical shell 1 is identical with the width of spacing lug 17.

In the specific implementation, needle stand spacing ring 22 in upper shed place of described tube neck 5 is provided with, tube neck 5 inwalls are provided with annular seal ring limited step 23.

As shown in fig. 1, the international standard syringe needle screws in along the female thread of outer needle stand inner wall of ring body, finish the assembling of syringe needle and interior needle stand, be provided with annular seal ring between interior needle stand and the tube neck, annular seal ring carries out spacing with sealing ring position limiting convex ring and annular seal ring limited step, and to an interior needle stand and a tube neck are sealed fully, and the linear retaining spare that is stuck in the neck can stop the interior needle stand displacement backward on its top, spacing lug matches with retaining convex rib, needle stand rotates in the tube neck in stoping, and interior needle stand spacing ring can prevent that interior needle stand from skidding off from the upper shed of tube neck.

As shown in Figure 3, pull back core bar and carry out imbibition.

As shown in 4, after imbibition is finished, promoting core bar forward injects, when the circular step of the joint pin bottom of pulling back props up the hemizonid of linear retaining spare, the joint pin of pulling back has inserted in the cavity of interior needle stand post, continue to promote forward core bar, linear retaining spare is under the effect of circular step, flexural deformation, its two ends break away from tube neck inwall, and with the circular step displacement forward of core bar, when core bar is pushed into the bottom, symmetric spacing fin was pushed up on the pull back top of joint pin, and was stuck at spacing fin front end, because the joint pin of pulling back is provided with the ring seal draw-in groove near vertical outer wall place, and the cross section of ring seal draw-in groove is shape in echelon, after symmetric spacing fin was pushed up on the top of the joint pin of pulling back, the end of spacing fin can be stuck in the ring seal draw-in groove, and the top of the joint pin of pulling back is firmly locked.

As shown in Figure 6, finish injection after, pull back core bar, interior needle stand and needle section are drawn in the cylindrical shell by integral body, realize the effect of syringe general safety self-destruction.

Claims

1. safety self-destructing syringe, it mainly comprises cylindrical shell (1), be provided with core bar (2) in the cylindrical shell (1), the end of cylindrical shell (1) is provided with international standard syringe needle (3), the outer sheath (4) that is socketed with of international standard syringe needle (3), core bar (2) locates to be socketed with annular plug (13), it is characterized in that: be provided with interior needle stand (6) in the tube neck (5) of described cylindrical shell (1), interior needle stand (6) is made of interior needle stand post (7) and outer needle stand ring body (8), interior needle stand post (7) bottom is connected with outer needle stand ring body (8) bottom, interior needle stand post (7) is positioned at the centre bit of outer needle stand ring body (8), form gap (9) between interior needle stand post (7) and the outer needle stand ring body (8), international standard syringe needle (3) is socketed in interior needle stand post (7) outside, interior needle stand post (7) inner chamber hollow, interior needle stand post (7) upper shed place forms the spacing fin (10) of two symmetrical distributions, forming the cross section between two spacing fins (10) is trapezoid interval, the width at top, trapezoidal interval is less than the diameter of interior needle stand post (7) inner chamber, be provided with linear retaining spare (11) in the tube neck (5) of interior needle stand (6) bottom, the two ends of linear retaining spare (11) are stuck in a neck (5) inwall place, the middle part of linear retaining spare (11) forms hemizonid (12), hemizonid (12) is over against interior needle stand post (7) inner chamber under shed, the end of core bar (2) forms the joint pin (14) of pulling back, and the joint pin of pulling back (14) is provided with ring seal draw-in groove (15) near vertical outer wall place.

2. a kind of safety self-destructing syringe according to claim 1, it is characterized in that: described outer needle stand ring body (8) inwall is provided with female thread (16), outer needle stand ring body (8) outer wall is evenly distributed with spacing block set (17) longitudinally, outer needle stand ring body (8) outer wall is provided with sealing ring position limiting convex ring (18) near the place, bottom, outer needle stand ring body (8) outer wall is socketed with annular seal ring (19), and annular seal ring (19) is positioned at sealing ring position limiting convex ring (18) top.

3. a kind of safety self-destructing syringe according to claim 1, it is characterized in that: the described joint pin of pulling back (14) bottom forms circular step (20), the diameter of circular step (20) is greater than the diameter of hemizonid (12), and it is cylindric or hemispherical that the end of the joint pin of pulling back (14) becomes.

4. a kind of safety self-destructing syringe according to claim 1 is characterized in that: the cross section of described ring seal draw-in groove (15) is shape in echelon.

5. a kind of safety self-destructing syringe according to claim 1, it is characterized in that: tube neck (5) the inwall place of described cylindrical shell (1) vertically is evenly distributed with the retaining convex rib (21) that cooperatively interacts with spacing lug (17), and the spacing between two retaining convex ribs (21) is identical with the width of spacing lug (17).

6. a kind of safety self-destructing syringe according to claim 1 is characterized in that: needle stand spacing ring (22) in upper shed place of described tube neck (5) is provided with, tube neck (5) inwall is provided with annular seal ring limited step (23).