CN203677670U - Novel self-destruction injection syringe - Google Patents

Abstract

The utility model provides a novel self-destruction injection syringe, and belongs to the field of medical injection syringes. The novel self-destruction injection syringe is characterized in that a tubular cavity (8) with the diameter being larger than that of a needle tube (2) is formed in the inlet end of the needle tube (2), and the tubular cavity (8) is connected with the needle tube (2) through a conical connecting section (9). A circle of clamping ring (4) is tightly attached to the inner wall of the tubular cavity (8), and a plurality of elastic pieces (6) which are in flexible connection with the clamping ring (4) are evenly distributed on the circumference of the inner circle of the clamping ring (4). A circular channel is defined by the elastic pieces (6), a cone frustum (5) with the diameter being larger than the diameter of the circular channel is arranged on a push rod (3), the cone frustum (5) can abut against the edges of the elastic pieces (6) to enable the circular channel to be extended and penetrate through the circular channel, after the cone frustum (5) penetrates through the circular channel, the back portion of the cone frustum (5) is clamped by the elastic pieces (6) and can not be pulled out. The novel self-destruction injection syringe can ensure that injection is smooth, relieve the pains of a patient, and have the advantages of being simple in design and low in cost.

Description

A kind of novel self-destroyed syringe

Technical field

A kind of novel self-destroyed syringe, belongs to medical syringe field, is specifically related to a kind of syringe that can realize self-destruction.

Background technology

Syringe is the upper requisite a kind of disposable utensil of medical treatment, although syringe all stipulates to carry out disposable use, but in order really to accomplish to avoid syringe repeatedly to use, also some syringe starts design and installs self-desttruction equipment additional, make syringe after once using, in function, cannot reuse, this has just guaranteed that from root syringe be not repeated utilization.Existing, the design of self-destroyed syringe is divided into two kinds of principles substantially: the one, and after injection, push rod is fractureed, thereby reach self-destruction object; Another kind is that injection rear push-rod cannot retract and reuses, to reach self-destruction object.Front a kind of making and operation are all comparatively complicated, need to be after injection again people for fractureing, so be not promoted use; A kind of mode after more self-destroyed syringe adopts, but some problems are in use also found, for example: 1, because check device design is unreasonable, in the time injecting and push push rod, easily cause pause, cause injection process not smooth, can produce shake, increased injection patient's pain sensation; 2, adopt asymmetrical design mode to realize non-return self-destruction, design is complicated, has greatly increased cost of manufacture.

Summary of the invention

?the technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provide a kind of and guarantee that injection is smooth, reduce patient's pain sensation, simplicity of design, the novel self-destroyed syringe that cost is low.

This utility model solves the technical scheme that its technical problem adopts: this novel self-destroyed syringe, comprise syringe, the medicament port of export of syringe is installed syringe needle, slidably push rod is installed in syringe, plug is installed in push rod termination, it is characterized in that: the entrance point of described syringe is provided with the tubular die cavity that a diameter is greater than syringe, tubular die cavity connects syringe by a taper connection section, the inwall of tubular die cavity tightens the circle snap ring that has been sticked, the multiple shell fragments that flexibly connect with it of snap ring inner ring circumference uniform distribution, multiple shell fragments surround and form a circular channel, push rod is provided with the frustum of a cone that a diameter is greater than circular channel, the frustum of a cone can withstand on shell fragment edge and circular channel magnified and pass circular channel, the frustum of a cone is through after circular channel, its back is blocked and cannot be extracted by shell fragment.Tubular die cavity adopts the design of simple tubular, and for taking advantage of be installed ring and shell fragment, tubular die cavity is realized seamless connection by taper connection section and syringe, and not only attractive in appearance but also make simply, one-shot forming just can complete; Shell fragment adopts symmetric design, makes simply, and cost is low, and flexibly connects between shell fragment and snap ring, and the frustum of a cone can be very smoothly by shell fragment jack-up, and enters circular channel, in the time of injection, can not produce the sense that pauses, and reduces patient's pain sensation.

The described frustum of a cone is combined by two sections of conical section and cylindrical sections, and the diameter of the frustum of a cone is less than the internal diameter of tubular die cavity, is greater than the internal diameter of syringe.The design of conical section is in order to utilize its tapering to back down shell fragment, to enter circular channel, realizes and contacting with shell fragment is smooth simultaneously, and the design of cylindrical section is the effect that prevents withdrawal in order to utilize its end face and shell fragment to be stuck, to play, thereby realizes the self-locking of push rod non-return.

The tapering of the described frustum of a cone is identical with the tapering of taper connection section.Can guarantee the frustum of a cone and taper connection section inwall close contact, reach the effect that prevents that medicinal liquid from flowing out or unpurified gas enters, more can guarantee safety and the wholesomeness of syringe.

Preferably, described shell fragment arranges 4 altogether.Through multiple injection test, shell fragment arranges 4 and not only can guarantee to inject smooth, and shell fragment can be moderate with the active force of frustum of a cone clamping, and cost of manufacture is relatively low simultaneously.

Compared with prior art, the beneficial effect that this utility model has is:

1, the shell fragment of this novel self-destroyed syringe adopts symmetric design, make simple, cost is low, and flexibly connect between shell fragment and snap ring, the frustum of a cone can be very smoothly by shell fragment jack-up, and enters circular channel, in the time of injection, can not produce the sense that pauses, reduce patient's pain sensation, and simple to operate, can meet the requirement of the rear self-destruction of injection.

2, tubular die cavity is used for taking advantage of be installed ring and shell fragment, and tubular die cavity is realized seamless connection by taper connection section and syringe, and not only attractive in appearance but also make simply, one-shot forming just can complete, and cost is lower, be applicable to carrying out on a large scale in popularization.

3, the tapering of the frustum of a cone is identical with the tapering of taper connection section, can guarantee the frustum of a cone and taper connection section inwall close contact, reaches the effect that prevents that medicinal liquid from flowing out or unpurified gas enters, and more can guarantee safety and the wholesomeness of syringe.

Accompanying drawing explanation

Fig. 1 is the structure cutaway view of this novel self-destroyed syringe.

Fig. 2 is the using state structure cutaway view of this novel self-destroyed syringe.

Fig. 3 is the structure top view of snap ring and shell fragment.

Wherein: 1, plug 2, syringe 3, push rod 4, snap ring 5, the frustum of a cone 6, shell fragment 7, syringe needle 8, tubular die cavity 9, linkage section.

The specific embodiment

Fig. 1 ~ 2nd, most preferred embodiment of the present utility model, is described further below in conjunction with 1 ~ 2 pair of this utility model of accompanying drawing.

With reference to accompanying drawing 1, 3: a kind of novel self-destroyed syringe, comprise syringe 2, the medicament port of export of syringe 2 is installed syringe needle 7, slidably push rod 3 of the interior installation of syringe 2, plug 1 is installed in push rod 3 terminations, the entrance point of syringe 2 is provided with the tubular die cavity 8 that a diameter is greater than syringe 2, tubular die cavity 8 connects syringe 2 by a taper connection section 9, the inwall of tubular die cavity 8 tightens the circle snap ring 4 that has been sticked, 4 shell fragments that flexibly connect with it 6 of snap ring 4 inner ring circumference uniform distribution, multiple shell fragments 6 surround and form a circular channel, push rod 3 is provided with the frustum of a cone 5 that a diameter is greater than circular channel, the frustum of a cone 5 is combined by two sections of conical section and cylindrical sections, the diameter of the frustum of a cone 5 is less than the internal diameter of tubular die cavity 8, be greater than the internal diameter of syringe 2, the tapering of the frustum of a cone 5 is identical with the tapering of taper connection section 9.The frustum of a cone 5 can withstand on shell fragment 6 edges and circular channel magnified and pass circular channel, and the frustum of a cone 5 is through after circular channel, and its back is blocked and cannot be extracted by shell fragment 6.

Operation principle is as follows, this novel self-destroyed syringe in the time not using state as shown in Figure 1, the frustum of a cone 5 is positioned at the outside of shell fragment 6, in the time that suction medicament is injected, as shown in Figure 2, push rod 3 drives the frustum of a cone 5 to move to shell fragment 6, and the taper seat of the frustum of a cone 5 contacts with shell fragment 6, continue to promote push rod 3, make the frustum of a cone 5 jack-up shell fragments 6, and pass shell fragment 6 in the circular channel forming from shell fragment 6, after having injected, the frustum of a cone 5 passes completely through circular channel, arrives shell fragment 6 opposite sides.If want to retract push rod 3, the cylindrical section of the frustum of a cone 5 and shell fragment 6 are stuck, and cannot pull out, and form locking self-destruction, prevent the utilization of syringe secondary.And owing to adopting and flexibly connecting between shell fragment 6 and snap ring 4, the frustum of a cone 5 can be very smoothly by shell fragment 6 jack-up, and enter circular channel, in the time of injection, can not produce the sense that pauses, reduce patient's pain sensation.

The above, it is only preferred embodiment of the present utility model, be not the restriction of this utility model being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.

Claims (4)

1. a novel self-destroyed syringe, comprise syringe (2), the medicament port of export of syringe (2) is installed syringe needle (7), slidably push rod (3) is installed in syringe (2), plug (1) is installed in push rod (3) termination, it is characterized in that: the entrance point of described syringe (2) is provided with the tubular die cavity (8) that a diameter is greater than syringe (2), tubular die cavity (8) connects syringe (2) by a taper connection section (9), the inwall of tubular die cavity (8) tightens the circle snap ring (4) that has been sticked, the multiple shell fragments that flexibly connect with it of snap ring (4) inner ring circumference uniform distribution (6), multiple shell fragments (6) surround and form a circular channel, push rod (3) is provided with the frustum of a cone (5) that a diameter is greater than circular channel, the frustum of a cone (5) can withstand on shell fragment (6) edge and circular channel magnified and pass circular channel, the frustum of a cone (5) is through after circular channel, its back is blocked and cannot be extracted by shell fragment (6).

2. the novel self-destroyed syringe of one according to claim 1, it is characterized in that: the described frustum of a cone (5) is combined by two sections of conical section and cylindrical sections, the diameter of the frustum of a cone (5) is less than the internal diameter of tubular die cavity (8), is greater than the internal diameter of syringe (2).

3. the novel self-destroyed syringe of one according to claim 1 and 2, is characterized in that: the tapering of the described frustum of a cone (5) is identical with the tapering of taper connection section (9).

4. the novel self-destroyed syringe of one according to claim 1, is characterized in that: described shell fragment (6) arranges 4 altogether.

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