CN2841028Y

CN2841028Y - Simple safety syringe

Info

Publication number: CN2841028Y
Application number: CN 200520046608
Authority: CN
Inventors: 林秀枝
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-17
Filing date: 2005-11-17
Publication date: 2006-11-29
Anticipated expiration: 2015-11-17

Abstract

The utility model relates to a simple safety syringe which comprises an injecting cylinder and a pushing rod, wherein one end of the injecting cylinder is spirally provided with a needle head group which comprises a needle seat and a needle head arranged on the needle seat; one end of the pushing rod is provided with a pushing rod piston which can be inserted in the injecting cylinder, and the top surface of the pushing rod piston is provided with a piston body which can be tightly contained in a containing groove of the needle seat. When the utility model recovers the needle head group, the piston body arranged on the pushing rod piston closes the containing groove and rotates the pushing rod, and the needle head group is separated from the injecting cylinder by friction force and is drawn in the injecting cylinder by using the pushing rod. The utility model has the advantages that no noise is emitted in the process of operation, the production cost is reduced because of the simplex shape, and the popularization rate of use is increased.

Description

The plain type safety injector

Technical field

This utility model is a kind ofly to be applied to medical field and can to promote syringe safe in utilization, refers to especially a kind ofly utilize cock body to cooperate to produce frictional force in order to reclaiming entry needle with needle stand, and simple structure, plain type safety injector that production cost is low.

Background technology

Medical personnel are when using injection tube injection medicament or blood drawing check, often stabbed in the process that covers needle cover by syringe needle, and many diseases for example hepatitis or AIDS all are to see through blood infection, wound can touch patient's body fluid when medical personnel are wounded by stabbing, thereby under the excessive risk that makes medical personnel be exposed to catch, therefore for avoiding the design that safety syringe-drum is arranged and the release of this problem.

Existing safety injector forms many bendings when making, has complicated shape, the therefore necessary high mould production of service precision, and the high mould of precision is expensive and increase the problem of production cost except price, because the raising of production cost can make the price of safety injector improve, make its price competitiveless, so the high safety injector of the more general syringe of cost is because the factor of price and can't popularizing is very unfortunate.

Except the cost problem, existing safety injector also has some shortcomings in use, common people more or less nourish fear to injecting the invasive medical procedure of this kind, and when being the patient infusion medicament, each member of existing safety injector engages with each other and can send the clear and melodious sound, the patient Geng Yi that this sound is had an injection for fear increases the fear of seeking medical advice, and also influences the wish that medical institutes adopts existing safety injector.

Summary of the invention

Because that existing safety injector has a cost is high and be difficult for popularizing, and send shortcoming such as the sound in the use, this utility model provides a kind of plain type safety injector, mainly reaches the purpose of safe handling with simple structure and addresses the above problem.

For achieving the above object, a kind of plain type safety injector of the present utility model, it is to comprise:

One injection tube is provided with one section female thread in injection tube one end inwall, and the other end is provided with the retaining edge of outside projection;

One syringe needle group, it comprises that a needle stand and that is arranged at injection tube one end is located at the syringe needle on the needle stand; Needle stand one end is provided with the external screw thread that matches with the female thread of injection tube, needle stand differs from and is provided with the syringe needle attachment that male end is established an extended injection tube, be provided with a sluice way in the syringe needle attachment, needle stand is provided with the male end storage tank that communicates with sluice way that sets to the concave, the storage tank internal face is interval with one with upper runner, and runner communicates with the end face that needle stand is provided with male end; And

One can be placed in the push rod in the injection tube, and push rod one end is provided with a push-rod piston that can plug injection tube, and lower periphery is encircled respectively and established a gas-tight ring on the push-rod piston, has the push-rod piston end face to be provided with a cock body that can closely be inserted in the storage tank of needle stand.

This utility model uses when extracting medicinal liquid or blood, liquid enters in this injection tube after via syringe needle, sluice way and runner, after finishing using, be to borrow this push rod with cock body set on its push-rod piston, push rotating push-rod in the storage tank of needle stand, then leave injection tube, then push rod is pulled back by the frictional force of cock body and the needle stand storage tank needle stand of outwarding winding, utilize frictional force that the syringe needle group is reclaimed to injection tube, promptly reach the purpose of this utility model safe handling.

This utility model drives needle stand with cock body and reclaims the syringe needle group, so the design of each one and shape structure are all simple, cause the labyrinth design unlike existing safety syringe-drum needs mutual buckle, and that compares is following, the utlity model has following good characteristic:

1, this utility model simple structure, need not use accurate mould ejection formation can reach the purpose of safe handling, make easily and can effectively reduce cost, has the competitiveness on the price, even on price, be as good as with general syringe cylinder, make that this utility model can be effectively universal, allow masses be used.

2, owing to its simple structure of this utility model, and member is few because of assembling easily, also can effectively reduce the human cost of assembling.

3, this utility model is not to use the mode that interlocks to reclaim the syringe needle group, can not produce the clear and melodious sound in applying to the process of liquid medicine injection, can not cause injected patient's fear.

The accompanying drawing summary

Fig. 1 is the three-dimensional exploded view of this utility model plain type safety injector.

Fig. 2 is the profile of this utility model plain type safety injector.

Fig. 3 is the profile of this utility model plain type safety injector.

Fig. 4 is the action sketch map of the push rod cock body of this utility model plain type safety injector.

Fig. 5 is the action sketch map that unscrews needle stand of this utility model plain type safety injector.

Fig. 6 is the recovery needle stand of this utility model plain type safety injector and the action sketch map of the push rod that fractures.

The specific embodiment

This utility model is a kind of plain type safety injector 10, and please referring to shown in the preferred embodiment of Fig. 1-3, it comprises:

One injection tube 11 is cylindric, and injection tube 11 1 end interior sidewall surface are provided with one section female thread 12, and injection tube 11 is formed the retaining edge 13 of a flap-like in the other end that is not provided with female thread 12 by the outside respectively projection in side face both sides.

One syringe needle group 20, it comprises that a syringe needle 21 and slightly is the needle stand 22 of taper, wherein:

Needle stand 22 is that spiral shell is located at an end that is provided with female thread 12 in the injection tube 11, and slightly tapered, and needle stand 22 is established one section external screw thread 221 with the end outside wall surface ring that injection tube 11 joins, and syringe needle group 20 can be screwed togather be fixed on the injection tube 11.Needle stand 22 is equipped with a gas-tight ring 222 to outer process in the ora terminalis that is provided with external screw thread 221, and gas-tight ring 222 is against the inwall of injection tube 11.Needle stand 22 differs from end central authorities that are provided with external screw thread 221, the syringe needle attachment 223 of establishing extended injection tube 11 1 ends, and the front end of syringe needle attachment 223 is taper, syringe needle attachment 223 and in wherein forming a sluice way 225 that connects.Needle stand 22 is provided with external screw thread 221 ends and is arranged with a storage tank 226, storage tank 226 is circular and communicates with sluice way 225 in this preferred embodiment, storage tank 226 internal faces of needle stand 22 form at least one runner 224 that axially is provided with at interval, each runner 224 is to communicate with the end face that needle stand 22 is provided with gas-tight ring 222 for long groove shape and runner 224, in this preferred embodiment, be provided with four road runners 224 in the needle stand 22, and the length of each runner 224 and storage tank 226 etc. are dark.

Syringe needle 21 is sheathed syringe needle attachment 223 free ends that are incorporated into, and communicates with sluice way 225, and in addition, syringe needle 21 also can form one-body molded with syringe needle attachment 223 free ends.

One push rod 30, the insertion end of push rod 30 are provided with a short cylinder cork and constitute push-rod piston 31, push-rod piston about in the of 31 ora terminalis be equipped with one the ring 311.Push-rod piston 31 end faces convex with a cock body 32, cock body 32 be cylindrical and with outside wall surface against and closely be inserted in storage tank 226 grooves weeks and have certain friction, in this preferred embodiment, the height of cock body 32 approximates the degree of depth of storage tank 226.Push rod 30 and in form a bending recess 33 near the part of push-rod piston 31.

This utility model uses when extracting medicinal liquid, please referring to Fig. 2, spur these push rod 30 its push-rod pistons 31 of drive and cock body 32 drawing liquid backward, this moment, liquid was to be flowed in the injection tube 11 via this sluice way 225, runner 224 backs in regular turn by this syringe needle 21, oppositely promoting push-rod piston 31 then releases the air in the injection tube 11, when avoiding injection medicament air is squeezed in the human body, during injection to be used, syringe needle 21 is inserted the patient, promote push rod 30 then, medicament is sent by syringe needle 21 via sluice way 225 by the runner 224 of this needle stand 22 again.

When this utility model injection finishing back desire reclaims syringe needle group 20, this moment, state of the present utility model was please referring to Fig. 1, shown in the 3-6, promotion push rod 30 makes with the set cock body 32 in push-rod piston 31 tops and enters in the storage tank 226 of needle stand 22, make cock body 32 sealing storage tanks 226 that each runner 224 is not communicated with sluice way 225, and set gas-tight ring 311 on the push-rod piston 31,312 seal each runner 224 and reach sealing, needle stand 22 is unclamped in the frictional force rotation that then utilizes cock body 32 to cooperate with the storage tank 226 of needle stand 22, make it break away from screw lock mated condition and injection tube 11 is left in turn, then push rod 40 is pulled back, syringe needle group 20 is reclaimed in injection tube 11, at last push rod 30 is fractureed by bending recess 33 places, promptly reach the purpose of this utility model safe handling.

Claims

1, a kind of plain type safety injector is characterized in that:

One syringe needle group, it comprises that a needle stand and that is arranged at injection tube one end is located at the syringe needle on the needle stand; Needle stand one end is provided with the external screw thread that matches with the female thread of injection tube, needle stand differs from and is provided with the syringe needle attachment that male end is established an extended injection tube, be provided with a sluice way in the syringe needle attachment, needle stand is provided with the male end storage tank that communicates with sluice way that sets to the concave, the storage tank internal face is interval with at least one runner, and runner communicates with the end face that needle stand is provided with male end; And

One can be placed in the push rod in the injection tube, and push rod one end is provided with a push-rod piston that can plug injection tube, and the push-rod piston end face is provided with a cock body that can closely be inserted in the storage tank of needle stand.

2. the plain type safety injector of stating as claim 1, it is characterized in that: the syringe needle attachment of described needle stand is a taper and in conjunction with described syringe needle, described needle stand is equipped with a gas-tight ring outwardly in the ora terminalis side face that is provided with male end, and gas-tight ring is against the inwall of described injection tube.

3. plain type safety injector as claimed in claim 1 or 2 is characterized in that: described syringe needle is to be integrally formed at described syringe needle attachment.

4, plain type safety injector as claimed in claim 3 is characterized in that: described push rod forms a bending recess in the part near its push-rod piston.

5, plain type safety injector as claimed in claim 4 is characterized in that: described storage tank internal face is interval with four road runners.

6, plain type safety injector as claimed in claim 1 or 2 is characterized in that: described push rod forms a bending recess in the part near its push-rod piston.

7, plain type safety injector as claimed in claim 1 or 2 is characterized in that: described storage tank internal face is interval with four road runners.