CN203577077U

CN203577077U - Self-locking type self-destroying injector

Info

Publication number: CN203577077U
Application number: CN201320637955.9U
Authority: CN
Inventors: 潘建伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-16
Filing date: 2013-10-16
Publication date: 2014-05-07
Anticipated expiration: 2023-10-16

Abstract

The utility model relates to a self-locking type self-destroying injector and belongs to the field of medical equipment. The self-locking type self-destroying injector overcomes the defects that most of existing self-destroying injectors are complicated in structure and high in production difficulty. The self-locking type self-destroying injector comprises a needle cylinder, a retaining ring, a pushing rod and a sealing plug. The retaining ring is fixed to the rear end of the needle cylinder, the sealing plug is installed at the head end of the pushing rod, the pushing rod is installed in the needle cylinder and the sealing plug can move in the needle cylinder by pushing and pulling the pushing rod. A stop step with the slightly smaller inner diameter is arranged on the inner wall of the retaining ring. A clamping piece is arranged on the pushing rod. When the sealing plug on the pushing rod is pushed to the frontmost end of the needle cylinder, the clamping piece on the pushing rod slides into the stop step on the retaining ring to be locked, the pushing rod can not be pulled back any more and the aim of self destroying is achieved. The injector is effectively prevented from being used again. The self-locking type self-destroying injector is simple in structure, easy to produce and capable of being widely used.

Description

A kind of self-locking type self-breaking syringe

Technical field

This utility model relates to a kind of self-locking type self-breaking syringe, belongs to technical field of medical instruments.

Background technology

Disposable syringe is a kind of consumptive material the most frequently used in clinical treatment, with syringe, carrying out drug injection is a kind for the treatment of means efficiently, China comprises that the various injections of immunity inoculation are about 3,000,000,000 times every year, the whole world approximately has 16,000,000,000 injections every year, the phenomenon that causes infection but disposable syringe is reused is always troubling, national governments also remain incessant after repeated prohibition, and therefore, the syringe that development can realize self-destruction after injection becomes an important topic of medical instruments field.The patented product that relates to self-destroyed syringe is more, but all because project organization is complicated, production and application cost is high or the factor such as inconvenient operation makes the scope of application of this series products be subject to limitation.

Summary of the invention

The purpose of this utility model is: provide a kind of simple in structure, and easily large-scale production, cost is low, and production efficiency is high, easy to operate self-destroyed syringe.

Detailed technology scheme of the present utility model is:

A self-locking type self-breaking syringe, comprises syringe, back-up ring, push rod, sealing-plug; It is characterized in that: this back-up ring is fixed on the rear end of syringe, sealing-plug is arranged on the head end of push rod, and push rod is arranged in syringe, and sealing-plug can move by push-and-pull push rod in syringe; The back end inside diameter of described syringe is slightly larger than front inner diameter, and the external diameter of this internal diameter and back-up ring matches; Described back-up ring inwall is provided with the smaller retaining step of an internal diameter, and the sagittal plane of retaining step and axial vane surface are 90 ° or be less than 90 ° of angles; Described back-up ring inserts the large position of back end of syringe internal diameter, and fixedly shape is in aggregates for the modes such as back-up ring sticks with glue, welding, riveted joint and syringe; Described push rod is provided with card, and the external diameter of card place circle is slightly larger than the internal diameter of retaining step, and it is smoothly skewed that the outward flange of card is, and that inward flange can be designed to is linear, arc, bank combination shape or other shapes; The quantity of card is 1～4; On push rod, be also provided with a breach with the correspondence position of card, when card pushes to center, can bend towards breach, the quantity of muscle pairing on the quantity of breach and push rod, the indentation, there of push rod forms the junction that an intensity is lower, produces fracture when being subject to exceeding the pulling force of intensity herein; On push rod, be also provided with a safety plate, can prevent from using front maloperation and make self-destroyed syringe shift to an earlier date self-locking.

While using this utility model self-locking type self-breaking syringe, first, in the situation that not taking safety plate, by medical standard, carry out aspiration medicinal liquid and aerofluxus bubble, then take safety plate, by medical standard, inject again, when whole injecting liquid drugs complete, on push rod sealing-plug be pushed to syringe foremost time, the card on push rod slips in retaining step on back-up ring and pins, or else push rod can be pulled back, cannot reuse, when brute force is pulled back, push rod is pulled off from the lower junction of intensity.

Outstanding advantages of the present utility model is:

1. project organization is simple, only on the push rod of former common disposable syringe, sets up on card and syringe and increases back-up ring.

2. production cost is low, and sealing-plug is identical with common disposable syringe, and the syringe of self-destroyed syringe, back-up ring, push rod all adopt plastic raw materials injection mo(u)lding, to consume raw material almost suitable with common disposable syringe.

3. easily large-scale production, production efficiency is high, each parts direct-assembling finished product for this utility model self-locking type self-breaking syringe, production technology used is all identical with common disposable syringe with automation equipment.

4. easy to operate, the operational approach of this utility model self-locking type self-breaking syringe is identical with common disposable syringe, and operator does not need other actions, directly makes syringe self-destruction after finishing using.

Accompanying drawing explanation

Fig. 1 is the structural representation before this utility model self-destruction;

Fig. 2 is pusher structure schematic diagram;

Fig. 3 is syringe cylinder structure schematic diagram;

Fig. 4 is back-up ring structural representation;

Fig. 5 is the card position schematic perspective view that has 4 cards;

Fig. 6 is the card position schematic perspective view that has 2 cards;

Fig. 7 is the structural representation of this utility model self-destruction state.

In figure: 1 syringe, 2 sealing-plugs, 3 push rods, 4 cards, 5 back end of syringe, 6 retaining steps

Muscle on 7 back-up rings, 8 safety plates, 9, breach, 10 junctions, 11 push rods

The specific embodiment

Below in conjunction with accompanying drawing, this utility model is further described:

Embodiment: as shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, a kind of self-locking type self-breaking syringe, comprises syringe (1), back-up ring (7), push rod (3), sealing-plug (2); It is characterized in that: this back-up ring (7) is fixed on back end of syringe (5), sealing-plug (2) is arranged on the head end of push rod (3), and push rod (3) is arranged in syringe (1), and sealing-plug (2) can move by push-and-pull push rod (3) in syringe (1); Described back end of syringe (5) internal diameter is slightly larger than front inner diameter, and the external diameter of this internal diameter and back-up ring (7) matches; Described back-up ring (7) inwall is provided with the smaller retaining step (6) of an internal diameter, and the sagittal plane of retaining step (6) and axial vane surface are 90 ° or be less than 90 ° of angles; Described back-up ring (7) inserts the large position of back end of syringe (5) internal diameter, and fixedly shape is in aggregates for the modes such as back-up ring (7) sticks with glue, welding, riveted joint and syringe (1); Described push rod (3) is provided with card (4), and the external diameter of card (4) place circle is slightly larger than the internal diameter of retaining step (6), and the outward flange of card (4) is smoothly skewed, and that inward flange can be designed to is linear, arc, bank combination shape or other shapes; The quantity of card (4) is 1～4; Correspondence position upper at push rod (3) and card (4) is also provided with a breach (9), when card (4) pushes to center, can bend towards breach (9), the quantity of muscle (11) pairing on the quantity of breach (9) and push rod, the breach of push rod (9) locates to form the junction that an intensity is lower (10), produces fracture when being subject to exceeding the pulling force of intensity herein; On push rod, be also provided with a safety plate (8), can prevent from using front maloperation and make self-destroyed syringe shift to an earlier date self-locking.

Claims

1. a self-locking type self-breaking syringe, comprises syringe, back-up ring, push rod, sealing-plug; It is characterized in that: this back-up ring is fixed on the rear end of syringe, sealing-plug is arranged on the head end of push rod, and push rod is arranged in syringe, and sealing-plug can move by push-and-pull push rod in syringe; Described back-up ring inwall is provided with the smaller retaining step of an internal diameter; Described push rod is provided with card.

2. self-locking type self-breaking syringe according to claim 1, is characterized in that: the back end inside diameter of described syringe is slightly larger than front inner diameter, and the external diameter of this internal diameter and back-up ring matches.

3. self-locking type self-breaking syringe according to claim 1, is characterized in that: described back-up ring is fixed on the large position of back end inside diameter of syringe.

4. self-locking type self-breaking syringe according to claim 2, is characterized in that: described back-up ring and syringe are fixedly realized by technological means such as gluing, welding, riveted joints.

5. self-locking type self-breaking syringe according to claim 1, is characterized in that: the sagittal plane of the retaining step of back-up ring inwall and axial vane surface are 90 ° or be less than 90 ° of angles.

6. self-locking type self-breaking syringe according to claim 1, is characterized in that: card and push rod are integrated, and establishes hinge tooth on card, and it is smoothly skewed that the outward flange of card is, and that inward flange can be designed to is linear, arc, bank combination shape or other shapes.

7. self-locking type self-breaking syringe according to claim 1, is characterized in that: the correspondence position at card on push rod is provided with breach, when card pushes to center, can bend towards breach.

8. self-locking type self-breaking syringe according to claim 1, is characterized in that: the quantity of card can be designed as 1,2,3 or 4, the breach quantity on push rod and number of cards pairing.