CN102631735A

CN102631735A - Two-piece pull-back self-destruct syringe

Info

Publication number: CN102631735A
Application number: CN2012101462761A
Authority: CN
Inventors: 钱云周; 吕海洋; 傅国煜
Original assignee: JIANGSU SHENGSHENG PHARMACEUTICAL CO Ltd
Current assignee: JIANGSU SHENGSHENG PHARMACEUTICAL CO Ltd
Priority date: 2012-05-14
Filing date: 2012-05-14
Publication date: 2012-08-15
Anticipated expiration: 2032-05-14
Also published as: CN102631735B

Abstract

The invention relates to a two-piece pull-back self-destruct syringe, which is simple in structure, is convenient to process and manufacture, and is low in manufacture and production costs. The two-piece pull-back self-destruct syringe comprises an outer tube and a corresponding injection pushing piece, wherein one end of the injection pushing piece in the outer tube is provided with a pulling and buckling device opposite to a convex edge of a needle holder, and the end part of the inner side of the corresponding end of the outer tube is provided with an accommodating area opposite to the pulling and buckling device.

Description

A kind of two haulback type self-destroyed syringes

Technical field

The present invention relates to a kind of medical apparatus, relate in particular to a kind of two haulback type self-destroyed syringes.

Background technology

Cylinder haulback type syringe receives the generally approval of doctor and patient; Use comparatively extensive; This needle stand that mainly belongs to it can be retracted to urceolus after injection is accomplished after can self-destruction, thus realize and can only disposablely use, avoided and possibly cause unexpected injury and to patient's cross infection medical personnel; But find also in the use that there is certain defective in it; Be embodied in several aspects: the one, component parts is many, forms (needle assembly, syringe, rubber stopper, push rod) by four parts, so that production cost is higher relatively; The 2nd, the needle stand retraction adopts the push rod top center to establish the umbrella shape back-off device; Injection is accomplished simultaneously, and the umbrella shape device inserts the needle stand center; Thereby just must having in Mold Making, needle stand looses core; This has increased the manufacture difficulty of mould on the one hand, goes out the die cavity number on the other hand and reduces, and then restricted production efficiency, increased production cost; Next is that push rod needs and the supporting use of rubber stopper, has increased the assembling number of packages of product, has equally also increased production cost.

Summary of the invention

The objective of the invention is the deficiency to the prior art existence, a kind of two haulback type self-destroyed syringes are provided, this syringe construction is simple, and processing and fabricating is convenient, and it is low to make production cost.

Technical scheme of the present invention comprises urceolus and injects part accordingly, said inject part be in a end in the urceolus be provided with one with the corresponding buckle device that draws of chimb of needle stand, the medial end of the respective ends of said urceolus is provided with this and draws the corresponding district that holds of buckle device.

Urceolus and to inject its shape of cross section of part rounded or oval saidly draws buckle device and holds the district accordingly and be located at circle respectively and inject the relative both sides of the inner side end of part end face and circular outer cylinder thereof, or be located at the corresponding relative both sides of minor axis that ellipse is injected the inner side end of part end face and oval urceolus thereof respectively.

The said part of injecting comprises the bar core, is that integral type is annotated the sealing that is positioned at bar core end of part and is positioned at the inboard guide part of sealing with said bar core respectively, the said both sides relatively of drawing on the end face that buckle device is located at sealing portion.

The said two L shaped drag hooks that draw spiral-lock to be changed to each other to be located at respectively in opposite directions the relative both sides of said respective end of injecting part hold the district accordingly and are two recessed grooves of both sides relatively on the inner side end of the corresponding respective ends of being located at urceolus with said two L shaped drag hooks respectively.

Its tail end internal perisporium face of said urceolus is provided with and the corresponding positive stop lug boss of push rod.

The needle stand sleeve pipe tube chamber of said outer cylinder front end is the conical cavity of 6:100, and the needle stand sleeve pipe forms sealing through tube chamber tapering and the needle stand of 6:100.

Said urceolus and bar core afterbody handle are rectangle.

The present invention has following beneficial effect: 1, directly do piston with the bar core, whole component parts is few; 2, with respect to existing needle stand clasp joint spare designs simplification the has been set manufacture difficulty of mould, increased mould go out the die cavity number, improved production capacity, thereby reduced production cost; 3, needle stand is fitted into ellipse urceolus needle stand inside pipe casing, utilizes the tapering of 6:100 airtight, not only can prevent leaking but also helping injecting the retraction of back needle stand of liquid; 3, urceolus and bar core afterbody handle adopt rectangular design, and being convenient to when finished product is assembled is the spacing benchmark that machine is assembled provides assembling; Even 4, owing to draw spiral-lock to be changed to be arranged on the push rod and existence that the corresponding relative both sides of minor axis that are positioned at oval urceolus make this syringe have to draw buckle device; Drug residue through in the urceolus after the experiment injection completion can be lower than the 0.07ml of relevant criterion less than 0.06ml.

Description of drawings

Fig. 1 is the structural representation of syringe of the present invention; Fig. 2 accomplishes the L shaped drag hook of injecting part after the injection for Fig. 1 syringe and fastens the needle stand syringe needle sketch map of pulling back; Fig. 3 is that Fig. 1 is along A-A line cutaway view; Fig. 4 is Fig. 1 left view.The partial enlarged drawing that Fig. 5 cooperatively interacts for needle stand among Fig. 1 and the L shaped drag hook of injecting part.

The specific embodiment

Existing through embodiment and combine accompanying drawing that the present invention is described further.Shown in Fig. 1-5, the push rod 11 of its shape of cross section ovalize is by bar core 2, outer tube 1 front end be the sealing 4 of interference fit with corresponding urceolus 1 internal perisporium, the guide part 3 integral types cast that is positioned at outer tube 1 tail end one side of sealing 4 constitutes; The relative both sides of the edge of oval minor axis are provided with two corresponding in opposite directions L shaped drag hooks 5 on the end face of sealing 4, the inner side end of the front end of the urceolus 1 of its shape of cross section ovalize (diapire face) 1c, corresponding to the relative both sides of the edge of oval minor axis be provided with respectively 5 that adapt with two L shaped drag hooks, with the chimb 7 corresponding recessed groove 1a of the respective ends of needle stand.

The telescopic tube chamber of needle stand of oval urceolus 1 front end is the conical cavity 10 of 6:100, and the needle stand sleeve pipe forms sealing through tube chamber tapering and the needle stand 6 of 6:100; The tail end nozzle internal perisporium of urceolus 1 is provided with positive stop lug boss 1b; The tail end handle 9 of oval urceolus 1 is square respectively with oval tail end handle 8 of injecting part 11.

During use; When injection is accomplished; The two L shaped drag hooks of injecting part get in two recessed grooves of ccontaining L shaped drag hook (as shown in Figure 1), are injecting part when withdrawing from, and two L shaped drag hooks hook needle stand through the end chimb 7 to the neighboring protrusion of needle stand; Needle stand is returned in the urceolus together with syringe needle, the cervical region of waiting to inject part pull out outer nozzle again row fracture; The positive stop lug boss of urceolus can prevent that injecting part is completely pulled out of urceolus.

The present invention draws buckle device to be arranged at and injects the last from acting on needle stand toward in can guarantee that injecting the part manufacturing exceeds under the prerequisite that increases complexity of part outward; The processing technology and the structure of whole syringe have been simplified greatly; Woods is made simpler on the whole than prior art, cost is lower; Particularly owing to only accomplish drawing buckle device to enter into fully to hold the district just to calculate injection, in the urceolus of this moment so that hold district's recessed groove) in medicinal liquid all injected part and draw buckle device to squeeze near totally, thereby residual quantity is few.

The scope that all belongs to the present invention's protection based on other modified products of the technical scheme of these two haulback type self-destroyed syringes; The foregoing description is not the exhaustive of the specific embodiment of the present invention.

Claims

1. two haulback type self-destroyed syringes; Comprise urceolus and inject part accordingly; It is characterized in that said inject part be in a end in the urceolus be provided with one with the corresponding buckle device that draws of chimb of needle stand, the medial end of the respective ends of said urceolus is provided with this and draws the corresponding district that holds of buckle device.

2. according to said two the haulback type self-destroyed syringes of claim 1; It is characterized in that urceolus and inject its shape of cross section of part rounded or oval, saidly draw buckle device and hold the district accordingly and be located at circle respectively and inject the relative both sides of the inner side end of part end face and circular outer cylinder thereof, or be located at the corresponding relative both sides of minor axis that ellipse is injected the inner side end of part end face and oval urceolus thereof respectively.

3. according to said two the haulback type self-destroyed syringes of claim 1; It is characterized in that the said part of injecting comprises the bar core; Be that integral type is annotated the sealing that is positioned at bar core end of part and is positioned at the inboard guide part of sealing with said bar core respectively, the said both sides relatively of drawing on the end face that buckle device is located at sealing portion.

4. according to claim 1,2 or 3 said two haulback type self-destroyed syringes; It is characterized in that the said two L shaped drag hooks that draw spiral-lock to be changed to each other to be located at respectively in opposite directions the relative both sides of said respective end of injecting part, hold the district accordingly and be two recessed grooves of both sides relatively on the inner side end of the corresponding respective ends of being located at urceolus with said two L shaped drag hooks respectively.

5. according to claim 1 or 2 said two haulback type self-destroyed syringes, it is characterized in that its tail end internal perisporium face of said urceolus is provided with and the corresponding positive stop lug boss of push rod.

6. according to claim 1 or 2 said two haulback type self-destroyed syringes, it is characterized in that the needle stand sleeve pipe tube chamber of said outer cylinder front end is the conical cavity of 6:100, the needle stand sleeve pipe forms sealing through tube chamber tapering and the needle stand of 6:100.

7. according to said two the haulback type self-destroyed syringes of claim 1, it is characterized in that said urceolus and bar core afterbody handle are rectangle.