CN216169226U - A one-way push type anti-reuse micro-quantity syringe - Google Patents

Abstract

The utility model belongs to the field of medical instruments, provides a unidirectional push type reusable micro quantitative injector, and aims to provide an injector which can ensure that the injected injector cannot be reused by other people to cause secondary infection, can ensure that liquid medicine is sucked once, and can perform multi-point, micro and precise quantitative injection on the same patient. The main scheme includes that the quantitative injection syringe comprises an empty cylinder (1-1), a rubber plug (9) arranged at the top end of a core rod (10) and located in the empty cylinder, an outer sleeve (1-2) is arranged in the opening direction of the empty cylinder (1-1), a quantitative propulsion structure is arranged in the outer sleeve (1-2), and quantitative injection is achieved through the propulsion structure. According to the utility model, the push rod is locked by the reset spring and the wedge spring by rotating the press handle, and the push rod can only be pushed in one direction, so that the push rod cannot be reused by other people.

Description

A one-way push type anti-reuse micro-quantity syringe

technical field

The utility model belongs to the field of medical instruments, and provides a one-way push type anti-reuse micro-quantity syringe.

Background technique

Public syringes can transmit diseases, so they must be sterilized, but the sterilization equipment is expensive and time-consuming, so this method is basically eliminated, and disposable syringes emerge as the times require.

Disposable syringes have been widely used all over the world for many years. At present, the most common single-use syringes used by medical institutions are composed of a syringe barrel, a needle, a piston and a core rod assembled in the syringe barrel.

However, the injection dose of a common syringe is usually a one-time dose, that is, the liquid is drawn once, and the injection is completed at one time. Even if it is possible to draw a liquid for a divided injection, the injection dose is only determined by the operator through the syringe needle. The scale printed on the barrel is used for human judgment, and the scale of the syringe itself has errors, so there will be scale errors and human errors. Therefore, the stability and accuracy of the injection dose cannot be guaranteed. With the continuous development of treatment methods and drug efficacy, some diseases require multi-point injection of drugs for the same patient, and require micro-injection at each point, and the injection dose at each point is accurate and the same, while the current ordinary syringe The minimum volume is 0.1mL, which cannot meet the requirements of multiple, micro, and precise and fixed doses for each injection.

In addition, ordinary syringes cannot be destroyed after use, there is a risk that they may be reused, and cross-infection of pathogens will cause life hazards. Therefore, there is a need for a syringe that can simultaneously achieve one-time suction of medicinal liquid, multi-point, micro, and precise quantitative injection to the same patient, and can prevent secondary use.

Utility model content

This structure can extract a sufficient amount of medicinal liquid at one time, and then perform multi-point, micro, and precise quantitative injection to the patient in multiple times. For liquid medicine injection, the pumping speed is fast and the injection dose is accurate. By rotating the pressing hand, the quantitative propulsion structure takes effect, which ensures that the liquid medicine can be quickly extracted and the movement stroke of the core rod can be controlled during injection, which effectively solves the problem of rapid liquid extraction. At the same time, the core rod stop device ensures the automatic destruction of the syringe and prevents secondary use.

The purpose of the utility model is to provide a syringe that can not only ensure that the injected syringe will not be reused to cause secondary infection, but also can ensure that one-time suction of medicinal liquid can be used for multi-point, micro, and precise quantitative injection of the same patient. , reduce the operator's difficulty in operation and improve the uniformity of drug delivery at each point.

In order to achieve the above object, the utility model adopts the following technical solutions:

A one-way push type anti-reuse micro-quantity syringe, comprising an empty cylinder, a rubber stopper arranged at the top of a core rod and located in the empty cylinder, an outer sleeve is arranged in the opening direction of the empty cylinder, and a quantitative pusher is arranged in the outer sleeve structure, the quantitative propulsion structure includes a sleeve, a propulsion card and a clamp in the sleeve are arranged,

When the clamp is sleeved on the pusher card and the pusher card is clearance-fitted, the pusher card releases the core rod,

It also includes a push-hand reset spring and a push-hand, the push-hand is inserted into the push-in card and connected to the push-in card, one end of the push-hand return spring is pressed against the sleeve, and the other end is pushed against the push-hand;

When the clamp is sleeved on the pusher card and the pusher card is in an interference fit, the pusher card locks the core rod, pushes the pressing hand, and the pusher card drives the core rod forward. Limit, at this time, the push card continues to move forward, the push card and the clamp change from interference fit to clearance fit, the push card releases the core rod, the core rod stops and continues to advance, and then releases the pressing hand, and the pressing hand resets the spring. Under the action of the provided elastic force, the push clamp drives the clamp to reset. When the clamp reaches the limit position, the push clamp and the clamp change from clearance fit to interference fit, and the push clamp locks the core rod.

In the above technical solution, the outer sleeve is further provided with a sleeve fixing seat, and the sleeve is fixedly connected with the sleeve fixing seat.

In the above technical solution, the pressing of the hand includes a pressing-hand base, a limit cylinder arranged on the base, a pressing-hand reset spring limit tube set on the limit tube, and a pusher card arranged on the hand-pressing return spring limit tube. Connect the barrel.

In the above technical solution, the sleeve is a hollow structure, and one end of the sleeve close to the fixed seat is provided with a clamp limit step, and the other end is provided with a hand reset spring limit step. There is a hand-pressing limit step above, and an L-shaped reset limiting groove is arranged above the hand-pressing limit step, and the L-shaped reset limiting groove includes a horizontal limit groove and a vertical chute.

In the above technical solution, a limit protrusion is provided on the limit cylinder, and the limit protrusion cooperates with the L-shaped reset limit groove of the sleeve. When the limit protrusion is located in the lateral limit groove, the card and the card are pushed forward. The hoop is a clearance fit. By turning the hand, the limit protrusion exits the horizontal limit groove, and the limit protrusion is lifted to the end of the vertical chute by the hand reset spring, and the push clamp and the clamp are in an interference fit. .

In the above technical solution, it also includes a core rod push-down locking structure, the core rod push-down locking structure includes a wedge, a wedge spring, the wedge includes a wedge base, and at least two wedges are arranged on the wedge base. , there is only a wedge gap between each wedge head; a wedge limit block is also set on the wedge base.

In the above technical solution, the limit cylinder is also provided with a wedge limit block chute, and the diameter of the limit cylinder at one end near the base of the pressing hand gradually decreases to form a wedge pressing limit structure, and the wedge limits the position. The block is arranged in the chute of the wedge limit block, and the wedge spring is arranged between the wedge and the push card.

In the above technical solution, the pusher card includes a card body, the top of the card body is provided with a connecting part for connecting with the pressing hand, the bottom end of the card body is provided with a card head, and a position-limiting protruding head is arranged on the card head, along the direction of the card body and the card head. , provided with a notch.

In the above technical solution, friction teeth are provided on the contact surface between the propulsion card and the core rod.

In the above technical solution, the diameter of the clamp head gradually decreases from the outside to the inside of the clamp.

Because the utility model adopts the above-mentioned technical scheme, it has the following beneficial effects:

1. When the utility model is used, the core rod and the propulsion card are gap-fitted in the initial state. At this time, the medical staff can normally pull up the core rod to absorb and exhaust the medicinal liquid. The reset spring will push the limit protrusion of the hand out of the lateral limit groove of the L-shaped reset limit groove, so that the pusher card and the core rod are locked, and the wedge limit block exits the lateral limit of the L-shaped reset limit groove. When the core rod is pulled up, the wedge head locks the core rod to prevent it from pulling up and preventing repeated use. The position of the limit groove cannot be reached, and the locking of the wedge to the core rod cannot be released.

When the clamp is sleeved on the pusher card and the pusher card is in an interference fit, the pusher card locks the core rod, pushes the pressing hand, and the pusher card drives the core rod forward. Limit, at this time, the push card continues to move forward, the push card and the clamp change from interference fit to clearance fit, the push card releases the core rod, the core rod stops and continues to advance, and then releases the pressing hand, and the pressing hand resets the spring. Under the action of the provided elastic force, the push clamp drives the clamp to reset. When the clamp reaches the limit position, the push clamp and the clamp change from clearance fit to interference fit, and the push clamp locks the core rod. Realize quantitative injection.

The injection volume of the push card to push the core rod once is the injection dose at one point, and the volume of one pumping (syringe capacity) is several times the volume of one injection, so multi-point injection is realized.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the exploded view of the utility model;

Figure 3 is a partial cross-sectional view;

Figure 4 is a sectional view of the sleeve;

Figure 5 is a perspective view of the sleeve;

Figure 6 is a perspective view of pressing hands;

7 is a schematic diagram of a wedge structure;

FIG. 8 is a schematic diagram of the structure of a pusher card;

FIG. 9 is a schematic diagram of a partial structure.

Description of reference numerals

1-Cover, 1-1-Empty cylinder, 1-2-Outer sleeve, 1-3-Sleeve fixing seat, 2-Propulsion card, 2-1-Limiting boss, 2-2-Clamp head, 2 -3-Clamp body, 2-4-Connecting part, 2-5-Slot, 3-Clamp, 4-Sleeve, 4-1-Clamp limit step, 4-2-Clamp limit step, 4-3- Push-hand return spring limit step, 4-4- Push-hand limit step, 4- 5-L-shaped return limit groove, 5- Push-hand return spring, 6- Wedge spring, 7- Wedge Sub, 7-1- Wedge base, 7-2- Wedge head, 7-3- Wedge, 7-4- Wedge limit block, 8- Press hand, 8-1- Push card connecting cylinder, 8- 2- Push-hand reset spring limit cylinder, 8-3- Limit protrusion, 8-4-L-shaped reset limit groove, 8-5- Limit cylinder, 8- 6- Base, 9- Rubber stopper, 10-Core rod.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1

The utility model proposes a one-way push type anti-reuse micro and quantitative syringe, comprising an empty cylinder 1-1, a rubber stopper 9 arranged at the top of a core rod 10 and located in the empty cylinder, characterized in that the empty cylinder 1 -1 A sleeve fixing seat 1-3 is arranged in the opening direction, and a quantitative pushing structure is arranged on the sleeve fixing seat 1-3. Hoop 3,

When the clamp 3 is sleeved on the pusher card 2 and the pusher card 2 is in clearance fit, the pusher card 2 loosens the core rod 10,

Also includes a push-hand reset spring 5 and a push-hand 8, the push-hand 8 is inserted into the sleeve 4 to be connected with the sleeve 4, one end of the push-hand reset spring 5 is placed on the sleeve 4, and the other end is placed on the push-hand 8;

When the clamp 3 is put on the pusher card 2 and the pusher card 2 is in an interference fit, the pusher card 2 locks the core rod 10, pushes the pressing hand, and the pusher card 2 drives the core rod 10 forward. When it reaches the position of the sleeve fixing seat 1-3, it is limited. At this time, the pusher card 2 continues to advance forward. The pusher card 2 and the clamp 3 change from interference fit to clearance fit. The pusher card 2 releases the core rod 10, and the core The rod 10 stops and continues to advance, and then releases the pressing hand. Under the action of the elastic force provided by the pressing hand reset spring 5, the pushing card 2 drives the clamp 3 to reset. When the clamp 3 reaches the limit position, the pushing card 2 and the clamp 3 are pushed forward. From clearance fit to interference fit, push the card 2 to lock the core rod 10 .

In this embodiment, the structure of the outer sleeve 1-2 is removed, and the sleeve 4 and the sleeve fixing seat 1-3 are directly fixed and installed. Although the structure is simplified, the connection part between the sleeve 4 and the sleeve fixing seat 1-3 Because there is no protection of the outer sleeve 1-2, it is easy to break. However, those skilled in the art should know that the problem of breakage can also be solved by selecting suitable materials, but the cost of the specific implementation should be comprehensively considered.

Example 2

The utility model proposes a rotary type anti-reuse quantitative syringe, comprising an empty cylinder 1-1, a rubber stopper 9 arranged at the top of the core rod 10 and located in the empty cylinder, characterized in that the empty cylinder 1-1 is open An outer sleeve 1-2 is arranged in the direction, and a quantitative propulsion structure is arranged in the outer sleeve 1-2. The quantitative propulsion structure includes a sleeve 4, a propulsion card 2 in the sleeve 4, a clamp 3,

When the clamp 3 is sleeved on the pusher card 2 and the pusher card 2 is in clearance fit, the pusher card 2 releases the core rod 10 , and also includes a push-hand reset spring 5 and push-hand 8 , and the push-hand 8 is inserted into the sleeve 4 It is connected with the sleeve 4, and one end of the push-hand reset spring 5 is pressed against the sleeve 4, and the other end is placed on the push-hand 8;

When the clamp 3 is put on the pusher card 2 and the pusher card 2 is in an interference fit, the pusher card 2 locks the core rod 10, pushes the pressing hand, and the pusher card 2 drives the core rod 10 forward. When it reaches the position of the sleeve fixing seat 1-3, it is limited. At this time, the pusher card 2 continues to advance forward. The pusher card 2 and the clamp 3 change from interference fit to clearance fit. The pusher card 2 releases the core rod 10, and the core The rod 10 stops and continues to advance, and then releases the pressing hand. Under the action of the elastic force provided by the pressing hand reset spring 5, the pushing card 2 drives the clamp 3 to reset. When the clamp 3 reaches the limit position, the pushing card 2 and the clamp 3 are pushed forward. From clearance fit to interference fit, push the card 2 to lock the core rod 10 .

Example 3

On the basis of the above solution, the core rod is pulled up and locked, including a pusher clip 2 , a clamp 3 , a sleeve 4 , a push-hand return spring 5 , and a push-hand 8 , and the clamp 3 is sleeved on the pusher clamp 2 . Then insert it into the sleeve 4, the pressing hand 8 is inserted into the sleeve 4 and connected with the sleeve 4, one end of the pressing hand return spring 5 is pressed against the sleeve 4, and the other end is pressed against the pressing hand 8 to provide the pressing hand 8. A force in the pull-up direction of the mandrel.

On the basis of the above solution, the sleeve 4 is a hollow structure, one end of the sleeve close to the fixing seat 1-3 is provided with a clamp limit step 4-1, and the other end is provided with a hand reset spring limit step 4-3, there is a push-hand limit step 4-4 above the push-hand reset spring limit step 4-3, and an L-shaped reset limit groove is set above the push-hand limit step 4-4, and the L-shaped reset limit The position groove includes a lateral limit groove and a vertical chute.

On the basis of the above solution, the pressing hand 8 includes a pressing hand base 8-6, a limit cylinder 8-5 arranged on the base 8-6, and a pressing hand return spring limit cylinder arranged on the limit cylinder 8-5 8-2, and the push-card connecting cylinder 8-1 arranged on the push-hand return spring limiting cylinder 8-2.

On the basis of the above solution, the limiting cylinder 8-5 is provided with a limiting protrusion 8-3, and the limiting protrusion 8-3 is arranged in cooperation with the L-shaped reset limiting groove of the sleeve 4. Press the hand to make the limit protrusion 8-3 exit the horizontal limit groove, and push the limit protrusion 8-3 to the end of the vertical chute by pressing the return spring 5.

Example 4

On the basis of the above solution, the core rod push-down locking structure includes a wedge 7 and a wedge spring 6. The wedge 7 includes a wedge base 7-1, and the wedge base 7-1 is provided with at least 2 There are wedge heads 7-2, and there is only a wedge slot 7-3 between the wedge heads 7-2; a wedge stopper block 7-4 is also provided on the wedge base 7-1.

It is worth noting that those skilled in the art, under the technical inspiration of this scheme, should know that the number of wedge heads 7-2 can be selected according to actual needs. If two wedge heads are used, the preferred scheme of the present invention is 4. a wedge.

On the basis of the above solution, the stopper cylinder 8-5 is also provided with a wedge stopper chute 8-4, and the diameter of the stopper cylinder 8-5 at one end of the stopper base 8-6 gradually decreases to form The wedge head presses the limit structure, the wedge limit block 7-4 is arranged in the wedge limit block chute 8-4, and the wedge spring 6 is arranged between the wedge and the push card. It is worth noting that under the technical inspiration of this solution, those skilled in the art should know that it is preferable for the wedge head pressing and limiting structure to gradually decrease along the diameter of one end close to the base 8-6 of the pressing hand. When the wedge head moves upward through the spring pressure, the wedge head is compressed to achieve the purpose of locking the core rod.

The wedge is a hollow structure, and the core rod passes through the through hole in the center of the wedge, and is locked by the wedge head. Those skilled in the art should know that in order to ensure the locking effect, those skilled in the art should know that increasing The teeth thus increase the friction and improve the locking effect.

Example 5

On the basis of the above solution, the pusher card 2 includes a card body 2-3, the top of the card body 2-3 is provided with a connecting portion 2-4 for connecting with the pressing hand, and the bottom end of the card body 2-3 is provided with a card head 2-4 2. A limiting protrusion 2-1 is arranged on the chuck head 2-2, and a slot 2-5 is arranged along the direction of the chuck body 2-3 and the chuck head 2-2. The slot 2-5 structure of the pusher card 2 can be opened by a single word or by a cross. It is worth noting that those skilled in the art should know that under the technical inspiration of the solution of the present application, as long as the present application can be realized The way of opening the functional slot is all within the protection scope of the present application.

It is worth noting that the central through hole of the pusher card 2 should also be provided with teeth for increasing the friction between the core rod and the chuck head 2-2 of the pusher card, so as to ensure the locking effect.

Extended protection range: The jacket in this structure does not have a needle. The 6:100 cone head that meets the requirements of the GB1962.1 standard is reserved for use with the finished injection needle. This structure can also use the 6:100 needle that meets the requirements of the GB1962.2 standard. 100 taper or directly glue the needle tip to the front of the jacket.

Claims (10)

1. a one-way push type anti-reuse micro, quantitative syringe, comprising an empty cylinder (1-1), be arranged on the top of the core rod (10) and be positioned at the rubber stopper (9) in the empty cylinder, it is characterized in that, An outer sleeve (1-2) is provided in the opening direction of the cylinder (1-1), and a quantitative propulsion structure is arranged in the outer sleeve (1-2), the quantitative propulsion structure includes a sleeve (4), and a sleeve (1-2) is provided. 4) Pusher clip (2), clamp (3), When the clamp (3) is sleeved on the pusher card (2) and the pusher card (2) is in clearance fit, the pusher card (2) releases the core rod (10), It also includes a push-hand return spring (5) and a push-hand (8), the push-hand (8) is inserted into the push-in card (2) and connected to the push-in card (2), and one end of the push-hand return spring (5) is pressed against the sleeve. (4), the other end rests on the pressing hand (8); When the clamp (3) is sleeved on the pusher card (2) and the pusher card (2) is in an interference fit, the pusher card (2) locks the core rod (10), pushes the pressing hand (8), and pushes the pusher (2). 2) Drive the core rod (10) forward, when the clamp (3) is pushed to the position of the sleeve fixing seat (1-3), it is limited. At this time, the push card (2) continues to push forward, and the push card ( 2) Change from an interference fit to a clearance fit with the clamp (3), push the clamp (2) to release the mandrel (10), the mandrel (10) stops and continues to advance, then release the push-hand, and the push-hand return spring Under the action of the elastic force provided by (5), the pusher card (2) drives the clamp (3) to reset, and when the clamp (3) reaches the limit position, the pusher card (2) and the clamp (3) change from clearance fit to With an interference fit, push the card (2) to lock the core rod (10). 2. The one-way push type anti-reuse micro-quantity syringe according to claim 1, wherein the outer sleeve (1-2) is also provided with a sleeve fixing seat (1-3), The sleeve (4) is fixedly connected with the sleeve fixing seat (1-3). 3. A kind of one-way push type anti-reuse micro and quantitative syringe according to claim 1, is characterized in that, pressing hand (8) comprises pressing hand base (8-6), is arranged on base (8-6) ), the limit cylinder (8-5) on the 2) on the pusher card connecting cylinder (8-1). 4. The one-way push type anti-reuse micro-quantity syringe according to claim 3, wherein the sleeve (4) is a hollow structure, and the sleeve is close to the fixing seat (1-3) ) is provided with a clamp limit step (4-1) at one end, and a push-hand reset spring limit step (4-3) at the other end, and a push-hand reset spring limit step (4-3) above The limit step (4-4) is provided with an L-shaped reset limit groove (4-5) above the hand-pressing limit step (4-4), and the L-shaped reset limit groove (4-5) includes a horizontal Limit slot and vertical chute. 5. A one-way push type anti-reuse micro-quantity syringe according to claim 4, characterized in that, a limiting protrusion (8-3) is provided on the limiting cylinder (8-5), and the The limit protrusion (8-3) is arranged in cooperation with the L-shaped reset limit groove (4-5) of the sleeve (4). When the limit protrusion (8-3) is located in the lateral limit groove, the card ( 2) It is a clearance fit with the clamp (3), and by turning the pressing hand, the limit protrusion (8-3) exits the lateral limit groove, and the limit protrusion (8-3) is moved by the hand reset spring (5). ) is lifted to the end of the vertical chute, and the pusher (2) and the clamp (3) are in an interference fit. 6. A kind of single-direction push type anti-reuse micro-quantity syringe according to claim 1, characterized in that, also comprising a core rod anti-backward locking structure, and the core rod anti-backward locking structure comprises a wedge (7 ), the wedge spring (6), the wedge (7) comprises a wedge base (7-1), and the wedge base (7-1) is provided with at least 2 wedge heads (7-2), each wedge A wedge (7-3) is arranged between the heads (7-2); a wedge limit block (7-4) is also arranged on the wedge base (7-1). 7. The one-way push type anti-reuse micro and quantitative syringe according to claim 5, characterized in that, the limit cylinder (8-5) is also provided with a wedge limit block chute ( 8-4), the diameter of one end of the limit cylinder (8-5) close to the base of the pressing hand (8-6) is gradually reduced to form a wedge head pressing limit structure, and the wedge limit block (7-4) is provided with A wedge spring (6) is arranged between the wedge and the push card in the chute (8-4) of the wedge limit block. 8. The one-way push type anti-reuse micro-quantity syringe according to claim 1, wherein the push card (2) comprises a card body (2-3), and the top of the card body (2-3) A connecting portion (2-4) for connecting with the pressing hand is provided, a clamping head (2-2) is arranged at the bottom end of the clamping body (2-3), and a limiting protrusion (2) is arranged on the clamping head (2-2). -1), along the direction of the clamping body (2-3) and the clamping head (2-2), a notch (2-5) is provided. 9 . The one-way push type anti-reuse micro-quantity syringe according to claim 8 , wherein friction teeth are provided on the contact surface between the push card ( 2 ) and the core rod ( 10 ). 10 . 10. A one-way push type anti-reuse micro-quantity syringe according to claim 8, characterized in that the diameter of the clamp head (2-2) along the outer to inner direction of the clamp (3) is gradually Decrease.

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