CN216536411U

CN216536411U - Syringe with self-destroying needle

Info

Publication number: CN216536411U
Application number: CN202022737886.1U
Authority: CN
Inventors: 邱仲明; 张永君; 向宏飞
Original assignee: Sichuan Shuanglu Medical Apparatus & Instruments Co ltd
Current assignee: Sichuan Shuanglu Medical Apparatus & Instruments Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2022-05-17
Anticipated expiration: 2030-11-24

Abstract

The utility model provides a syringe with a self-destruction needle head, and relates to the technical field of syringes. The utility model comprises a barrel body, wherein a connecting barrel is arranged at the closed end of the barrel body, an inserting barrel is arranged on the connecting barrel, a sealing plug is filled between the injection needle and the inserting barrel, a rubber plug is arranged in the barrel body in a sliding manner, a push rod is arranged on the rubber plug, a groove is arranged on the side surface of the rubber plug close to the closed end of the barrel body, a pull ring is arranged at the end part of the connecting barrel in the barrel body, a pull block is arranged at the end part of the connecting barrel outside the barrel body, a convex ring is arranged on the inner wall of the groove, a blocking ball connected through a connecting rod is arranged in the groove, an elastic rod is arranged in the inserting barrel and connected with the sealing plug, a pull buckle matched with the pull block is arranged at the end part of the elastic rod, the pull ring can be inserted into the groove to be meshed with the convex ring, and the blocking ball can be pushed into the connecting barrel.

Description

Syringe with self-destroying needle

Technical Field

The utility model relates to the technical field of syringes, in particular to a syringe with a self-destruction needle head.

Background

Syringes are a common medical device. As early as the 15 th century, kathler, italian, proposed the principle of the syringe. Gas or liquid is primarily drawn or injected with a needle. Syringes may also be used for injection through rubber septa in medical devices, containers, scientific instruments such as in some chromatography. The self-destruction syringe is a disposable syringe product which can prevent the reuse after being used, and prevents the reuse of the syringe from infecting diseases.

The push rod of the existing self-destruction syringe can be inferred, and the rubber stopper in the syringe can not be pushed any more after the push rod is broken, so that the aim of preventing reuse is finally fulfilled. However, the self-destruction mode is complicated to operate, the push rod needs to be pulled out and broken along the weak part, part of users who want to reuse the syringe can reuse the syringe without breaking the push rod, and the needle head is still detachable and cannot be self-destroyed, so that a solution is needed urgently.

Disclosure of Invention

The utility model aims to develop a syringe with a self-destruction needle, which can prevent the needle from being reused and has simple and convenient self-destruction mode operation.

The utility model is realized by the following technical scheme:

the utility model provides a syringe with self-destruction syringe needle, includes the barrel, the blind end of barrel is equipped with the connecting cylinder, be equipped with on the connecting cylinder and insert a section of thick bamboo, the syringe needle is located and is inserted on the section of thick bamboo, fill the sealing plug between syringe needle and the section of thick bamboo, it is equipped with the rubber buffer to slide in the barrel, be equipped with the push rod on the rubber buffer, the side that the rubber buffer is close to the barrel blind end is equipped with the recess, the tip that the connecting cylinder is located the barrel is equipped with the pull ring, the tip that the connecting cylinder is located the barrel is external is equipped with the pull block, the inner wall of recess is equipped with protruding circle, be equipped with the stifled ball of connecting through the connecting rod in the recess, be equipped with the elastic rod in the section of thick bamboo of inserting, the elastic rod is connected with the sealing plug, the elastic rod tip is equipped with and draws the knot with the pull block complex, the pull ring can insert in the recess and interlock with protruding circle, the stifled ball can be pushed in the connecting cylinder.

Optionally, the outer side surface of the pull buckle is of an arc surface structure, and the side surface of the pull block close to the pull buckle is an inclined surface.

Optionally, the inner cavity of the connecting cylinder is in a truncated cone shape, and one end with a larger diameter faces the rubber plug.

Optionally, a rubber layer is arranged on the inner wall of the inner cavity of the connecting cylinder.

Optionally, the pull ring is arranged along the outer wall of the end of the connecting cylinder, the pull ring is in a circular truncated cone shape, and one end with a smaller diameter faces the rubber plug.

Optionally, the cross-sectional shape of the bead is a right triangle, and the inclined surface is disposed toward the tab.

Optionally, the outer surface of the ball plug is provided with a rubber layer.

Optionally, the blocking ball is arranged non-coaxially with the inner cavity of the connecting cylinder, and the connecting rod is arranged obliquely.

Optionally, one side that the rubber buffer kept away from the barrel blind end is equipped with the draw-in groove, the push rod tip correspondence be equipped with draw-in groove complex fixture block.

Optionally, the side wall of the clamping groove and the outer wall of the clamping block are cambered surfaces, so that the clamping groove and the clamping block are clamped.

The utility model has the beneficial effects that:

the utility model has simple use and simple and convenient operation, the disposable needle head can not be taken down once being connected with the connecting cylinder, and the needle head can lose the sealing property when being taken down forcibly, thereby preventing the needle head from being reused, and the rubber plug is pushed to the bottom, thereby automatically realizing the blockage of the connecting cylinder after the injection is finished, and the rubber plug is fixed at the closed end of the cylinder body, thereby preventing the syringe from being reused, avoiding pulling out and breaking the push rod, reducing the complex operation procedure of self-destruction after the syringe is used, and preventing the user from continuing to use the push rod without breaking the push rod.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a block diagram of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments may be modified in various different ways, without departing from the spirit or scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model discloses a syringe with a self-destruction needle, which comprises a barrel 11, wherein a connecting barrel 21 is arranged at the closed end of the barrel 11, an inserting barrel 37 is arranged on the connecting barrel 21, an injection needle 31 is arranged on the inserting barrel 37, a sealing plug 33 is filled between the injection needle 31 and the inserting barrel 37, a rubber plug 13 is arranged in the barrel 11 in a sliding manner, a push rod 12 is arranged on the rubber plug 13, a groove 16 is arranged on the side surface of the rubber plug 13 close to the closed end of the barrel 11, a pull ring 22 is arranged at the end part of the connecting barrel 21 in the barrel 11, a pull block 36 is arranged at the end part of the connecting barrel 21 outside the barrel 11, a convex ring 17 is arranged on the inner wall of the groove 16, a blocking ball 19 connected through a connecting rod 18 is arranged in the groove 16, an elastic rod 34 is arranged in the inserting barrel 37, the elastic rod 34 is connected with the sealing plug 33, a pull buckle 35 matched with the pull block 36 is arranged at the end part of the elastic rod 34, the pull ring 22 can be inserted into the recess 16 to engage with the bead 17 and the ball 19 can be pushed into the connecting cylinder 21.

In one embodiment of the present application, the end of the syringe 1 is provided with a needle holder 2, the syringe 1 is connected with the needle 3 through the needle holder 2, and the needle 3 is further provided with a protective cover 32.

The needle cylinder 1 comprises a cylinder body 11, a slidable rubber plug 13 is arranged in the cylinder body 11, and the rubber plug 13 slides in the cylinder body 11 to perform piston movement. The needle seat 2 is arranged at the closed end of the barrel body 11, a push rod 12 is arranged on one side, away from the needle seat 2, of the rubber plug 13, and the push rod 12 pushes the rubber plug 13 to perform piston movement in the barrel body 11.

The side that rubber buffer 13 is close to needle file 2 is the cambered surface, makes its blind end cooperation with barrel 11 closely paste, the side that needle file 2 was kept away from to rubber buffer 13 is equipped with draw-in groove 15, draw-in groove 15 is the circular recess, the lateral wall of draw-in groove 15 is the cambered surface form, and push rod 12 tip is equipped with the fixture block 14 with draw-in groove 15 complex, fixture block 14 shape is the same with draw-in groove 15, because the lateral wall of draw-in groove 15 and the outer wall of fixture block 14 are the cambered surface, make both can the joint, receive under great external force at push rod 12, can pull out fixture block 14 from draw-in groove 15.

Needle file 2 includes connecting cylinder 21, connecting cylinder 21 is round platform shape, the inner chamber of connecting cylinder 21 also is round platform shape, inside the great one end of connecting cylinder 21 diameter stretched into 11 blind ends of barrel, connecting cylinder 21 still is equipped with pull ring 22 on being located the tip in barrel 11, pull ring 22 encircles the outer tip setting of connecting cylinder 21, pull ring 22 is round platform shape, the less one end of pull ring 22 diameter is towards rubber buffer 13, the inner intracavity wall of connecting cylinder 21 still is equipped with the one deck rubber layer.

The side surface of the rubber stopper 13 close to the closed end of the barrel body 11 is provided with a groove 16 matched with the pull ring 22, the groove 16 is a circular groove with the inner diameter same as the maximum outer diameter of the pull ring 22, the groove 16 and the pull ring 22 are arranged coaxially, the inner wall of the groove 16 is provided with a convex ring 17, the convex ring 17 is arranged around the circumference of the inner wall of the middle part of the groove 16, the cross section of the convex ring 17 is in the shape of a right triangle, and the inclined plane is arranged towards the pull ring 22, the convex ring 17 and the rubber plug 13 are made of the same material, when the push rod 12 pushes the rubber plug 13 to move to the bottom, the pull ring 22 passes through the convex ring 17 and is clamped into the bottom of the groove 16, at the moment, the convex ring 17 is occluded with the pull ring 22, so that the rubber plug 13 is fixed with the connecting cylinder 21, after the rubber plug 13 is fixed, the push rod 12 is pulled to reach a certain pulling force, and then the clamping block 14 at the end part of the push rod 12 is pulled out from the clamping groove 15 at the side surface of the rubber plug 13, so that the rubber plug 13 is left at the closed end of the barrel body 11.

Still be equipped with stifled ball 19 in the recess 16, stifled ball 19 is used for blockking up connecting cylinder 21, stifled ball 19 is the spheroid structure, 19 outward appearances of stifled ball are equipped with one deck rubber layer, stifled ball 19 passes through connecting rod 18 and is connected bottom recess 16, and connecting rod 18 slopes to set up, connecting rod 18 one end is connected with stifled ball 19, and the other end is connected bottom recess 16, stifled ball 19 not with connecting cylinder 21 coaxial line, stifled ball 19 off-centre sets up, when making rubber buffer 13 promote stifled ball 19 motion, stifled ball 19 makes it gradually with connecting cylinder 21 coaxial line along the motion of 21 inner walls of connecting cylinder, and connecting rod 18 buckles this moment and is broken, makes stifled ball 19 stay in the cavity of connecting cylinder 21, and the rubber layer of 19 surfaces of stifled ball and the 21 inner walls of connecting cylinder makes stifled ball 19 block up connecting cylinder 21 completely.

The needle head 3 comprises a plug barrel 37, the plug barrel 37 is plugged on the connecting barrel 21, the end part of the plug barrel 37 is provided with an injection needle 31, a sealing plug 33 is filled between the injection needle 31 and the plug barrel 37, and the sealing plug 33 fills the gap between the injection needle 31 and the end part of the plug barrel 37. Two elastic rods 34 are arranged in the insert cylinder 37, one end of each elastic rod 34 is connected with the corresponding sealing plug 33, a pull buckle 35 is arranged at the other end of each elastic rod 34, and the outer side face of each pull buckle 35 is of an arc-shaped surface structure. The end part of the connecting cylinder 21, which is positioned outside the cylinder body 11, is provided with a pull block 36 matched with the pull buckle 35, the position of the pull block 36 corresponds to the pull buckle 35, the side surface of the pull block 36, which is close to the pull buckle 35, is an inclined surface, under the condition of no external force, the height of the pull buckle 35 is slightly lower than that of the pull block 36, when the inserting cylinder 37 is inserted on the connecting cylinder 21, the cambered surface of the outer side surface of the pull buckle 35 abuts against the inclined surface of the pull block 36 to slide, so that the pull buckle 35 is pulled on the pull block 36, at the moment, the inserting cylinder 37 and the connecting cylinder 21 are fixed through the elastic rod 34, the inserting cylinder 37 cannot be taken down from the connecting cylinder 21, when a user forcibly pulls the inserting cylinder 37 off from the connecting cylinder 21, the inserting cylinder 37 is subjected to excessive force, and the sealing plug 33 can be pulled down through the elastic rod 34, so that the inserting cylinder 31 and the inserting cylinder 37 are not sealed again.

When the utility model is not used, the ball block 19 does not enter the connecting cylinder 21, the pull ring 22 does not engage with the convex ring 17, after the medicine is sucked by the push rod 12, the push rod 12 is pushed to discharge air, injection is carried out, after injection is finished, the rubber plug 13 is pushed to be low by the push rod 12, the ball block 19 enters the connecting cylinder 21, the connecting rod 18 is broken along with the movement of the ball block 19, the ball block 19 is left in the connecting cylinder 21, the pull ring 22 engages with the convex ring 17, and the rubber plug 13 is fixed at the closed end of the cylinder body 11, so that the injector can not be used any more. After the needle 3 is inserted into the connecting tube 21, the pulling buckle 35 at the end of the elastic rod 34 engages with the pulling block 36 to fix the needle 3 and the connecting tube 21, so that the insertion hole and the injection needle 31 cannot be removed when the user wants to reuse the needle 3, and if the user pulls out the insertion hole with a large force, the elastic rod 34 pulls out the sealing plug 33, so that the injection needle 31 and the insertion tube 37 are no longer sealed and cannot be used.

The utility model has simple use and simple and convenient operation, the disposable needle 3 can not be taken down once being connected with the connecting cylinder 21 and can lose the sealing property of the needle 3 when being taken down forcibly, the needle 3 is prevented from being reused, the rubber plug 13 is pushed to the bottom, the connection cylinder 21 can be automatically blocked after injection is finished, and the rubber plug 13 is fixed at the closed end of the cylinder body 11, so that the injector can not be used any more, the push rod 12 does not need to be pulled out and broken, the fussy operation procedure of self-destruction which is needed after the injector is used is reduced, and the user is prevented from continuing to use the push rod 12 without breaking.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.

Claims

1. A syringe having a self-destructing needle, comprising:

a barrel;

the connecting cylinder is arranged at the closed end of the cylinder body;

the inserting cylinder is arranged on the connecting cylinder;

an injection needle provided on the cartridge;

the sealing plug is filled between the injection needle and the insertion barrel;

the rubber plug is arranged in the barrel in a sliding manner;

the push rod is arranged on the rubber plug;

the groove is arranged on the side surface of the rubber plug close to the closed end of the cylinder body;

the pull ring is arranged at the end part of the connecting cylinder in the cylinder body;

the pulling block is arranged at the end part of the connecting cylinder outside the cylinder body;

the convex ring is arranged along the inner wall of the groove;

the blocking ball is arranged in the groove and is connected with the groove through a connecting rod;

the plug cylinder is internally provided with an elastic rod, the elastic rod is connected with the sealing plug, the end part of the elastic rod is provided with a pull buckle matched with the pull block, the pull ring can be inserted into the groove to be meshed with the convex ring, and the blocking ball can be pushed into the connecting cylinder.

2. The syringe with self-destruction needle head as claimed in claim 1, wherein the outer side surface of the tab is of an arc surface structure, and the side surface of the pull block close to the tab is an inclined surface.

3. The syringe with self-destroying needle according to claim 2, wherein said connecting cylinder has a truncated cone-shaped inner cavity and a larger diameter end facing said rubber stopper.

4. The syringe with self-destroying needle according to claim 3, wherein said connecting cylinder has a rubber layer disposed on an inner wall of said inner chamber.

5. The syringe with self-destroying needle according to claim 4, wherein said pull ring is disposed along an outer wall of the end of the connecting cylinder, said pull ring is in a truncated cone shape, and one end with a smaller diameter faces the rubber stopper.

6. The syringe with self-destroying needle according to claim 5, wherein said collar has a right-angled triangle cross-sectional shape, and the bevel is disposed toward said pull ring.

7. The syringe with self-destroying needle according to claim 6, wherein said blocking ball has a rubber layer disposed on an outer surface thereof.

8. The syringe with self-destroying needle according to claim 7, wherein said blocking ball is disposed non-coaxially with the interior cavity of said connecting barrel, and said connecting rod is disposed obliquely.

9. The syringe with the self-destruction needle head as claimed in claim 8, wherein a slot is provided on one side of the rubber plug away from the closed end of the barrel, and a block fitting with the slot is correspondingly provided on the end of the push rod.

10. The syringe with self-destruction needle according to claim 9, wherein the side wall of the locking groove and the outer wall of the locking block are cambered surfaces, so that the locking groove and the locking block are locked.