CN219185314U

CN219185314U - Self-destroying syringe

Info

Publication number: CN219185314U
Application number: CN202222722502.8U
Authority: CN
Inventors: 陆军; 陆维炜; 赵丽杰; 倪琳
Original assignee: Jiangsu Caina Medical Technology Co ltd
Current assignee: Jiangsu Caina Medical Technology Co ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2023-06-16
Anticipated expiration: 2032-10-17

Abstract

The utility model relates to the technical field of medical appliances, in particular to a pull-back self-destroying injector, which comprises a needle cylinder, a needle seat and a core rod, wherein the needle seat is fixed at the front end of the needle cylinder, the needle seat extends out of the needle cylinder, the core rod is arranged in the needle cylinder in a penetrating way, the head of the core rod is provided with a rubber plug, the inner wall of the front end of the needle cylinder is provided with an inner buckling clamping column, the needle seat is clamped with the needle cylinder by being provided with a clamping hole corresponding to the inner buckling column, the head end of the core rod is provided with a locking part in front of the rubber plug, the side surface of the locking part is provided with a clamping protrusion, the needle seat is provided with a clamping groove corresponding to the clamping protrusion, and when the core rod is pushed to the front end of the needle cylinder, the locking part pushes up the inner buckling clamping column to release the needle seat, and simultaneously the needle seat is matched with the clamping protrusion by the clamping groove to realize pull-back self-destroying. According to the back-pulling self-destruction injector, the needle seat is unbinding with the needle cylinder and is clamped and fixed with the core rod according to the action of pushing the core rod to the bottom, so that the needle cylinder can be retracted into the needle cylinder by the back-pulling core rod, and self destruction is realized.

Description

Self-destroying syringe

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a pull-back self-destruction syringe.

Background

The syringe is a disposable tool which is indispensable in medical treatment, although the syringe is only required to be used once, in order to really avoid the syringe from being used for a plurality of times, some syringes are designed and additionally provided with self-destruction devices, namely, the syringe cannot be used again in function after being used once, so that the syringe is fundamentally ensured not to be reused.

Existing disposable syringes with self-destruct function find some problems during use, such as: 1) When the injection and pushing are performed, the stop is easy to cause, so that the injection process is not smooth, and the use feeling is poor; 2) The structure is unstable, and the error damage is easy to occur, so that the normal use is influenced; 3) The self-destruction structure is complex in design, troublesome in use, increased in manufacturing cost and inconvenient in operation.

Disclosure of Invention

Based on the above problems, the present utility model aims to provide a pull-back self-destruction injector, which improves the structural stability and ensures the normal use and self-destruction functions.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a pullback self-destruction syringe, including the cylinder, needle file and core bar, the needle file is fixed in the front end of cylinder, and stretch out the needle tubing on the needle file, the core bar wears to locate in the cylinder, and the head of core bar is provided with the plug, be provided with interior knot draw-in column on the front end inner wall of cylinder, it is provided with the draw-in hole to correspond interior knot draw-in column on the needle file, realize needle file and cylinder joint, the head end of core bar just is provided with locking part in the place ahead of plug, be provided with the chucking arch on the side surface of locking part, correspond the chucking arch on the needle file and be provided with the draw-in groove, when the core bar pushes away to the front end of cylinder, locking part jack-off interior knot draw-in column for the needle file is released, cooperates with the chucking arch through the draw-in groove simultaneously, make needle file and locking part joint, the pullback self-destruction can be realized.

In particular, the clamping groove radially penetrates through the needle seat, and the two clamping bulges are circumferentially and uniformly distributed on the surface of the locking part.

Particularly, a hollowed-out hole is formed in the locking part and located between the two clamping protrusions.

Particularly, the end part of the locking part is provided with a plug which extends into the needle seat and plugs the pipe orifice of the needle tube.

In particular, two inner buckling clamping columns are oppositely arranged, and two clamping holes are correspondingly formed in the end face of the needle seat.

In particular, a breaking point is arranged on the core rod and positioned behind the rubber plug.

Particularly, the side surface of the needle seat is provided with a guide bulge, and the inner side wall of the needle cylinder is provided with a groove corresponding to the guide bulge, so that the needle seat is accurately matched with the inner buckling clamping column.

In particular, the needle seat is provided with a sealing ring which is in sealing contact with the perforation at the front end of the needle cylinder.

In summary, compared with the prior art, the needle seat and the needle cylinder in the pull-back self-destruction injector are reliably clamped and fixed, and the needle seat and the needle cylinder are unbinding and clamped and fixed with the core rod according to the action of pushing the core rod to the bottom, so that the needle cylinder can be retracted into the needle cylinder by pulling back the core rod, self-destruction is realized, the process action is smooth, the operation is simple, the safety is high, and the structure is stable and reliable.

Drawings

FIG. 1 is a schematic view of the external form of a pull-back self-destructing syringe according to an embodiment of the present utility model;

fig. 2 is a schematic view of the inner wall of the front end of the syringe in the pullback self-destruction injector according to the embodiment of the present utility model;

fig. 3 is a schematic view of a needle holder in a pullback self-destruct syringe according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of the front end of a core rod in a pullback self-destroying injector according to an embodiment of the present utility model;

fig. 5 is a cross-sectional view of a pullback self-destructing syringe provided in an embodiment of the present disclosure.

In the figure:

1-a needle cylinder; 11-inner buckling clamping columns; 12-grooves; 2-a needle stand; 21-a clamping hole; 22-clamping grooves; 23-guiding the protrusion; 24-sealing rings; 3-core bar; 31-break point; 4-needle tube; 5-a rubber plug; 6-locking part; 61-clamping the protrusion; 62-hollowed holes; 63-plug.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar parts throughout, or parts having like or similar functions. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, mechanically connected, electrically connected, indirectly connected through an intermediary, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature. The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Referring to fig. 1 to 5, the preferred embodiment provides a pullback self-destroying injector, which comprises a syringe 1, a needle holder 2 and a core rod 3.

The needle seat 2 is fixed at the front end of the needle cylinder 1, the needle tube 4 extends out of the needle seat 2, the core rod 3 is arranged in the needle cylinder 1 in a penetrating way, and the head of the core rod 3 is provided with a rubber plug 5.

In particular, the inner wall of the front end of the needle cylinder 1 is provided with an inner buckling and clamping column 11, the needle seat 2 is provided with clamping holes 21 corresponding to the inner buckling and clamping column 11, the needle seat 2 and the needle cylinder 1 are clamped, preferably, the inner buckling and clamping columns 11 are oppositely arranged, the end face of the needle seat 2 is provided with two clamping holes 21 corresponding to each other, and the needle cylinder 1 and the needle seat 2 are reliably connected under the normal transfusion state without influencing normal use.

The head end of the core rod 3 and the front of the rubber plug 5 are provided with locking parts 6, the side surfaces of the locking parts 6 are provided with clamping protrusions 61, the needle seat 2 is provided with clamping grooves 22 corresponding to the clamping protrusions 61, when the core rod 3 is pushed to the front end of the needle cylinder 1, the locking parts 6 jack the inner buckling clamping columns 11, so that the needle seat 2 is released, and meanwhile, the needle seat 2 is matched with the clamping protrusions 61 through the clamping grooves 22, so that the needle seat 2 is clamped with the locking parts 6, and self-destruction of pull-back can be achieved.

The clamping groove 22 radially penetrates through the needle seat 2, and the two clamping protrusions 61 are circumferentially and uniformly distributed on the surface of the locking part 6. Further, a hollowed-out hole 62 is formed in the locking portion 6 and located between the two clamping protrusions 61, quality is reduced, and the necessary deformation amount of the buckle is given.

In addition, the end of the locking portion 6 is provided with a plug 63 extending into the needle holder 2, and the plug 63 plugs the nozzle of the needle tube 4.

The breaking point 31 is arranged on the core rod 3 and positioned at the rear of the rubber plug 5, so that after the needle tube 4 is retracted into the needle tube 1, the core rod 3 is broken off, and the recovery is convenient.

The side surface of the needle seat 2 is provided with a guide protrusion 23, and the inner side wall of the needle cylinder 1 is provided with a groove 12 corresponding to the guide protrusion 23, so that the needle seat 2 is accurately matched with the inner buckling clamping column 11, and the assembly is convenient.

In addition, the needle seat 2 is provided with a sealing ring 24 which is in sealing contact with the perforation at the front end of the needle cylinder 1, so that the structural tightness in a normal state is ensured.

In summary, the needle seat and the needle cylinder in the pull-back self-destruction injector are reliably clamped and fixed, and the needle seat and the needle cylinder are unbinding and clamped and fixed with the core rod according to the action of pushing the core rod to the bottom, so that the needle cylinder can be retracted into the needle cylinder by pulling back the core rod, self-destruction is realized, the process action is smooth, the operation is simple, the safety is high, and the structure is stable and reliable.

The above embodiments merely illustrate the basic principles and features of the present utility model, and the present utility model is not limited to the above embodiments, but can be variously changed and modified without departing from the spirit and scope of the present utility model, which is within the scope of the present utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a pullback self-destruction syringe, includes cylinder, needle file and core bar, the needle file is fixed the front end of cylinder, and stretches out the needle tubing on the needle file, the core bar wears to locate in the cylinder, and the head of core bar is provided with the plug, its characterized in that, be provided with on the front end inner wall of cylinder and detain the card post, correspond on the needle file detain the card post in and be provided with the draw-in hole, realize the needle file with the cylinder joint, the head end of core bar just is located the place ahead of plug is provided with locking part, be provided with the chucking arch on the side surface of locking part, correspond on the needle file the chucking arch is provided with the draw-in groove, when the core bar pushes away to the front end of cylinder, locking part top is opened detain the card post in, make the needle file is released, simultaneously through the draw-in groove with the cooperation of chucking arch, make the needle file with locking part joint can realize the pullback self-destruction.

2. The pullback self-destruction syringe of claim 1, wherein: the clamping grooves radially penetrate through the needle seat, and the two clamping bulges are circumferentially and uniformly distributed on the surface of the locking part.

3. The pullback self-destruction syringe of claim 2, wherein: and a hollowed-out hole is formed in the locking part and located between the two clamping protrusions.

4. The pullback self-destruction syringe of claim 1, wherein: the end part of the locking part is provided with a plug which extends into the needle seat, and the plug plugs the pipe orifice of the needle tube.

5. The pullback self-destruction syringe of claim 1, wherein: the inner buckling clamping columns are oppositely arranged in two, and two clamping holes are correspondingly formed in the end face of the needle seat.

6. The pullback self-destruction syringe of claim 1, wherein: and a breaking point is arranged on the core rod and positioned behind the rubber plug.

7. The pullback self-destruction syringe of claim 1, wherein: the side surface of the needle seat is provided with a guide bulge, and the inner side wall of the needle cylinder is provided with a groove corresponding to the guide bulge, so that the needle seat is accurately matched with the inner buckling clamping column.

8. The pullback self-destruction syringe of claim 1, wherein: the needle seat is provided with a sealing ring which is in sealing contact with the perforation at the front end of the needle cylinder.