CN105031772B

CN105031772B - Single-use auto-disable syringe

Info

Publication number: CN105031772B
Application number: CN201510509964.3A
Authority: CN
Inventors: 王景春; 江明明; 汪洋
Original assignee: JIANGXI FENGLIN MEDICAL APPLIANCE CO Ltd; Nanchang Fenglin Medical Equipment Technology Co Ltd; JIANGXI FENGLIN MEDICAL TECHNOLOGY Co Ltd
Current assignee: Jiangxi Fenglin Medical Appliance Co., Ltd.; Jiangxi Fenglin Medical Technology Co., Ltd.; Nanchang Fenglin medical equipment Technology Co., Ltd.
Priority date: 2015-08-19
Filing date: 2015-08-19
Publication date: 2018-11-27
Anticipated expiration: 2035-08-19
Also published as: CN105031772A

Abstract

The invention discloses single-use auto-disable syringes, it includes：Sleeve, syringe sleeve, which has, defines the inner surface, outlet plenum and open end of chamber；Push-rod assembly, push-rod assembly include push rod main body, the blade along push rod main body distribution, the piston that is connected in push rod main body and the multiple teeth portion being arranged on blade edge；Torus, annulus physical efficiency is slidably positioned in chamber, torus engages sleeve interior surface, and torus can be moved towards the opening extreme direction of syringe sleeve, and the teeth portion engagement of torus and push-rod assembly enables push-rod assembly and torus to move together towards the outlet plenum of syringe sleeve；And retainer ring, retainer ring are latched on sleeve outer surface, retainer ring is formed with retainer ring B valve by collar connection by retainer ring A valve.Using the combination of retainer ring and torus again to the effect of push rod so that product failure, in injection process, torus and syringe sleeve inner wall no-float, will not generate plastic scrap and polluting medical fluid or cylinder inner wall has flute mark to make leakage.

Description

Single-use auto-disable syringe

Technical field

The present invention relates to a kind of syringe more particularly to a kind of single-use auto-disable syringes.

Background technique

Although the prior art provides the syringe with locking member, locking member can lock automatically plunger rod to help It prevents from reusing, however the use of these syringes is used on a large scale not yet.Typical case relevant to existing syringe Cost lures that user attempts to reuse this device into.Therefore, it is necessary to produce, not only most effective to prevent it from reusing again easy The cost-effective signal use syringe used, to prevent to attempt to reuse.That is, needing to produce one kind The syringe of syringe effect is not damaged on the basis of reducing material and manufacturing cost and.

Summary of the invention

The technical problem to be solved by the invention is to provide a kind of single-use auto-disable syringes.

To solve technical problem of the invention, the technical solution adopted by the present invention is that：

Single-use auto-disable syringe, it includes：

Syringe sleeve, the syringe sleeve, which has, defines the inner surface, outlet plenum and open end of chamber；Push rod Component, the push-rod assembly include push rod main body, along the push rod main body distribution blade, be connected in the push rod main body Piston and the multiple teeth portion being arranged on the blade edge；Torus, the annulus physical efficiency are slidably positioned in the chamber Interior, the torus engage sleeve interior surface, and torus can be moved towards the opening extreme direction of syringe sleeve, torus Enable the push-rod assembly and torus together towards the outlet of syringe sleeve with the teeth portion engagement of the push-rod assembly Chamber movement；And retainer ring, for the retainer ring lock on sleeve outer surface, the retainer ring passes through retainer ring by retainer ring A valve and retainer ring B valve Interconnecting piece is formed.

Further, the cross-sectional shape of the torus is triangle or trapezoidal, at the torus and teeth portion engagement For torus inner surface, torus inner surface is inclined-plane, and annulus external surface is matched with retainer ring.

Further, the teeth portion has tooth proximal end face and tooth distal face.

Further, the retainer ring has retainer ring inner surface and retainer ring outer surface, and the retainer ring inner surface has multiple cards Card hole on tooth, the latch and syringe sleeve is locked.

Further, the latch has latch concave surface, latch concave bottom surface, latch concave crown face, the convex top surface of latch and latch Convex bottom face, the latch concave bottom surface and latch concave crown face are located at the bottom and top of latch concave surface, the convex top surface of the latch, latch Convex bottom face is located at the outside of latch concave surface.

Further, when the torus and retainer ring are locked, the annulus external surface is in conjunction with latch concave surface, the circle Ring bottom is in conjunction with latch concave bottom surface.

Retainer ring and torus are all made of non-metallic material, at low cost.

Beneficial effects of the present invention：Using the combination of retainer ring and torus again to the effect of push rod so that product failure, In injection process, torus and syringe sleeve inner wall no-float will not generate plastic scrap and pollute medical fluid or cylinder inner wall There is flute mark to make leakage.

Detailed description of the invention

Fig. 1 is the structural diagram of the present invention.

Fig. 2 is that component of the invention separates figure.

Fig. 3 is the structural schematic diagram of push rod in the present invention.

Fig. 3 a is the enlarged diagram in Fig. 3 at A.

Fig. 4 is the structural schematic diagram of middle sleeve of the present invention.

Fig. 5 is the structural schematic diagram of retainer ring in the present invention.

Fig. 6 is the diagrammatic cross-section of latch in Fig. 5.

Fig. 7 is that retainer ring is closed schematic diagram in the present invention.

Fig. 8 is the structural schematic diagram of torus in the present invention.

Fig. 8 a is the schematic cross-section of torus in Fig. 8.

Fig. 9 is retainer ring and torus locking state schematic diagram in the present invention.

Fig. 9 a is that retainer ring and torus lock diagrammatic cross-section in the present invention.

Figure 10 is that the present invention uses preceding status diagram.

Figure 11 is schematic diagram when the present invention is drawn into predeterminable quantity of liquid.

Figure 11 a is the enlarged cross-sectional view in Figure 11 at B.

Figure 12 is schematic diagram when present invention injection finishes.

Wherein,

1, push rod main body, 11, blade, 111, tooth, 1111, tooth proximal end face, 1112, tooth distal face；

2, retainer ring, 21, collar connection, 22, latch, 221, latch concave surface, 222, latch concave bottom surface, 223, latch concave crown Face, 224, the convex top surface of latch, 225, latch convex bottom face, 23, retainer ring end face A, 24, retainer ring end face B, 25, retainer ring inner surface, 26, Retainer ring outer surface, 27, retainer ring A valve, 28, retainer ring B valve；

3, syringe sleeve, 31, sleeve outer surface, 32, sleeve interior surface, 33, card hole, 34, chamber, 35, outlet plenum, 36, open end；

4, torus, 41, torus inner surface, 42, annulus external surface, 43, torus bottom surface；

5, piston；

6, liquid.

Specific embodiment

The present invention will be further explained below with reference to the attached drawings and specific examples.Following embodiment is merely to illustrate this hair It is bright, it is not limited to protection scope of the present invention.

Single-use auto-disable syringe of the invention, with reference to Fig. 1, Fig. 2, Fig. 4, syringe sleeve 3, syringe sleeve 3 have define the inner surface 32, outlet plenum 35 and open end 36 of chamber 34；

With reference to Fig. 3, push-rod assembly, push-rod assembly includes push rod main body 1, the blade 11 being distributed along push rod main body 1, is connected to Piston 5 in push rod main body 1 and the multiple teeth portion 111 being arranged on 11 edge of blade；

Torus 4, torus 4 can be slidably positioned in chamber 34, and torus 4 engages sleeve interior surface 32, torus 4 It can be moved towards 36 direction of the open end of syringe sleeve 3, torus 4 is engaged with the teeth portion 111 of push-rod assembly so that push rod Component and torus 4 can be moved towards the outlet plenum 35 of syringe sleeve 3 together；

Shown in Fig. 5, retainer ring 2, retainer ring 2 is latched on sleeve outer surface 31, and retainer ring 2 is led to by retainer ring A valve 27 and retainer ring B valve 28 Cross the formation of collar connection 21.

Shown in Fig. 8, the cross-sectional shape of torus 4 is triangle or trapezoidal, and Fig. 8 a show right angled triangle, torus 4 are made of torus inner surface 41, annulus external surface 42 and torus bottom surface 43, and torus 4 and the junction of teeth portion 111 are The combination of tooth proximal end face 1111 and torus bottom surface 43.As long as the shape of torus 4 meets：Torus 4 is corresponding with teeth portion 111 That face is inclined-plane, and the outer surface of torus 4 is matched with retainer ring 2, as long as the top and bottom of torus 4 are capable of fixing.

Shown in Fig. 3 a, teeth portion 111 has tooth proximal end face 1111 and tooth distal face 1112.

Shown in Fig. 5, retainer ring 2 has retainer ring inner surface 25 and retainer ring outer surface 26, and retainer ring inner surface 25 has multiple latches 22, latch 22 is locked with the card hole 33 on syringe sleeve 3.

Shown in Fig. 6, latch 22 has latch concave surface 221, latch concave bottom surface 222, latch concave crown face 223, the convex top surface of latch 224, latch convex bottom face 225, latch concave bottom surface 222 and latch concave crown face 223 are located at the bottom and top of latch concave surface 221, card The convex top surface 224 of tooth, latch convex bottom face 225 are located at the outside of latch concave surface 221.

Fig. 7 is that retainer ring is closed schematic diagram, retainer ring end face A23 and retainer ring end face B24 in two end faces closure in the present invention.

Shown in Fig. 9 and Fig. 9 a, when torus 4 and retainer ring 2 are locked, annulus external surface 42 is combined with latch concave surface 221, circle Ring bottom 43 is combined with latch concave bottom surface 222.

Shown in Figure 10, torus 4 will be attached to predetermined position before push-rod assembly fills piston 5；Torus 4 is in push rod main body Position in 1 teeth portion 111 can be set before factory, set this hair by default the distance between torus 4 and retainer ring 2 The maximum injection amount of bright syringe.

Shown in Figure 11, Figure 12, torus 4 once presetting in the position in the teeth portion 111 of push rod main body 1 once first fix In the dust, in pumping liquid 6, torus 4 is moved as push rod main body 1 is mobile, until pumping liquid reaches maximum preset amount, At this moment torus 4 locks in retainer ring 2.In Figure 11 a, the long D of tooth should be not less than the height d of torus 4, due to torus bottom surface 43 Teeth portion 111 is limited, retainer ring 2 limits torus 4, so at this moment push rod cannot can only be pushed to travel forward after the suction action that continues, It is finished once the liquid in syringe is injected, syringe cannot carry out suction action again, to realize the function that ceases to be in force automatically.

Retainer ring 2 and torus 4 are all made of non-metallic material, more at low cost than stainless steel metal locking member.Retainer ring 2 and annulus Body 4 it is structurally reasonable, incised wound accident will not be generated in production and assembly.

Using the combination of retainer ring 2 and torus 4 again to the effect of push rod so that product failure, in injection process, annulus Body and syringe sleeve inner wall no-float, will not generate plastic scrap and polluting medical fluid or cylinder inner wall has flute mark to make leakage.

Claims

1. single-use auto-disable syringe, which is characterized in that it includes：

Syringe sleeve, the syringe sleeve, which has, defines the inner surface, outlet plenum and open end of chamber；

Push-rod assembly, the push-rod assembly include push rod main body, along the push rod main body distribution blade, be connected to the push rod Piston in main body and the multiple teeth portion being arranged on the blade edge；

Torus, the annulus physical efficiency are slidably positioned in the chamber, and the torus engages sleeve interior surface, torus It can be moved towards the opening extreme direction of syringe sleeve, the teeth portion engagement of torus and the push-rod assembly makes the push rod Component and torus can be moved towards the outlet plenum of syringe sleeve together；And

Retainer ring, for the retainer ring lock on sleeve outer surface, the retainer ring passes through collar connection by retainer ring A valve and retainer ring B valve It is formed；

The cross-sectional shape of the torus be triangle or trapezoidal, torus by torus inner surface, annulus external surface and Torus bottom surface forms, and is torus inner surface at the torus and teeth portion engagement, and torus inner surface is inclined-plane, torus Outer surface is matched with retainer ring.

2. single-use auto-disable syringe according to claim 1, it is characterised in that：The teeth portion has tooth proximal end Face and tooth distal face.

3. single-use auto-disable syringe according to claim 1, it is characterised in that：The retainer ring has in retainer ring Surface and retainer ring outer surface, the retainer ring inner surface have multiple latches, and the card hole on the latch and syringe sleeve is locked.

4. single-use auto-disable syringe according to claim 3, it is characterised in that：The latch has latch recessed Face, latch concave bottom surface, latch concave crown face, the convex top surface of latch and latch convex bottom face, the latch concave bottom surface and latch concave crown face position In the bottom and top of latch concave surface, the convex top surface of the latch, latch convex bottom face are located at the outside of latch concave surface.

5. single-use auto-disable syringe according to claim 4, it is characterised in that：The torus and retainer ring are locked When tight, the annulus external surface is in conjunction with latch concave surface, and the torus bottom surface is in conjunction with latch concave bottom surface.