A puncture-proof device

Abstract

The present invention relates to a needle - proof device, which comprises an outer sheath. A spring is arranged inside the outer sheath, and an inner sheath is pressed on the spring and inserted into the outer sheath. A bottle body assembly is arranged inside the inner sheath. A limiting sleeve with a guiding hole is arranged at the upper end of the outer sheath. A U - shaped card is movably arranged inside the limiting sleeve. Position - stopping components are arranged on both sides of the guiding hole in the limiting sleeve in a mirror - image manner. An elastic component is arranged on the U - shaped card, and the elastic component contacts the position - stopping component. One end of the U - shaped card forms a traveling end, and the other end forms a pressing end. Anti - detachment buckles are arranged on the front side of the traveling end of the U - shaped card in a mirror - image manner, and the anti - detachment buckles contact the limiting sleeve. Thus, due to the presence of the U - shaped card, the needle - proof recycling function can be achieved after use by simply pressing, and the operation can be completed with one hand, which is convenient to use.

Description

Technical Field

[0001] The present invention relates to a device for drug injection, and in particular to a needle-stick prevention device. Background Art

[0002] For conventional drug injections, corresponding injection devices are configured for use, and currently disposable syringes are relatively common. To prevent the needle of the syringe after use from accidentally injuring the user, causing drug contamination, or the syringe from being reused, it is currently generally required that after the injection is completed, the needles be uniformly recycled; but with the further strict management of medical devices, some institutions have required that special protection devices be installed on disposable syringes. After the injection is completed, the protection device is activated to protect the needle part, prevent the needle from accidentally injuring people, and also prevent the needle from separating from the syringe body, thereby improving the use safety of disposable syringes.

[0003] Combined with the prior art, such as the needle-stick prevention safety device for injection devices with the Chinese patent publication number CN104411351A, the passive bolt-locking ring safety protection device for injection devices with the Chinese patent publication number CN101437561A, and the disposable safety syringe with the Chinese patent publication number CN1189222A, in order to prevent the needle from accidentally injuring people, they all adopt complex structures and have high implementation costs.

[0004] At the same time, combined with the prior art 202010946448.8, 202010947075.6, and 202021975875.0, the storage of the needle mainly relies on a structure similar to a claw for positioning. It requires certain operating skills and is prone to recycling failure during single-handed use.

[0005] In view of the above defects, the present inventor has actively carried out research and innovation in order to create a needle-stick prevention device that has more industrial utilization value. Summary of the Invention

[0006] To solve the above technical problems, the purpose of the present invention is to provide a needle-stick prevention device.

[0007] An anti - puncture device of the present invention includes an outer sheath. A spring is arranged inside the outer sheath. An inner sheath is pressed on the spring and connected into the outer sheath. A bottle body assembly is arranged inside the inner sheath, where: A limit sleeve with a guiding hole is arranged at the upper end of the outer sheath. A U - shaped card is movably arranged inside the limit sleeve. Stop components are arranged mirror - symmetrically on both sides of the guiding hole in the limit sleeve. An elastic component is arranged on the U - shaped card. The elastic component contacts the stop component. One end of the U - shaped card forms a traveling end, and the other end forms a pressing end. Anti - detachment buckles are arranged mirror - symmetrically on the front side of the traveling end of the U - shaped card. The anti - detachment buckles contact the limit sleeve. Protective edges are distributed mirror - symmetrically inside the traveling end of the U - shaped card. A first card slot is arranged at the upper end of the inner sheath, and a second card slot is arranged at the lower end of the inner sheath. In the use state, the protective edges are combined with the first card slot. A guiding groove is opened on the outer sheath, and a guiding post is arranged at the corresponding position of the inner sheath. The guiding post is embedded in the guiding groove. In the anti - puncture state, the protective edges are combined with the second card slot, and the guiding post abuts against the upper end of the guiding groove.

[0008] Further, in the above - mentioned anti - puncture device, the stop component is a stop block, and the elastic component is an elastic card strip. The elastic card strip contacts the stop block.

[0009] Even further, in the above - mentioned anti - puncture device, a stop groove is arranged on the stop block, and an arc - shaped contact surface is arranged on the elastic card strip. The arc - shaped contact surface contacts the stop groove.

[0010] Even further, in the above - mentioned anti - puncture device, a pressing block is arranged at the pressing end of the U - shaped card.

[0011] Even further, in the above - mentioned anti - puncture device, a holding piece is arranged at the upper end of the outer sheath.

[0012] Even further, in the above - mentioned anti - puncture device, a reinforcing rib is arranged between the holding piece and the outer sheath.

[0013] Even further, in the above - mentioned anti - puncture device, the bottle body assembly includes a liquid medicine bottle. A push rod is arranged at one end of the liquid medicine bottle, a needle body is arranged at the other end of the liquid medicine bottle, and a needle cap is arranged outside the needle body.

[0014] Still further, in the above - mentioned anti - puncture device, a blocking piece is arranged on the inner sheath, a blocking groove is arranged at the corresponding position of the limit sleeve, and the blocking piece is embedded in the blocking groove.

[0015] By means of the above - mentioned solution, the present invention has at least the following advantages:

[0016] 1. Due to the existence of the U-shaped card, the anti-needle-stick recycling function can be achieved by simple pressing after use, and the operation can be completed with one hand, making it convenient to use.

[0017] 2. The inner sheath can be stored and locked through the second card slot to ensure that it does not fall off when in the anti-needle-stick state.

[0018] 3. Spring is used for reset control without the need for additional manual force.

[0019] 4. Through the cooperation of the guide post and the guide groove, the movement trajectory of the inner sheath is controllable, and it will not come out of the outer sheath even when in the extreme position, ensuring safe use.

[0020] 5. The overall structure is simple, easy to manufacture and use. If there is an assembly error, it can be corrected conveniently without wasting materials.

[0021] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following will describe in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. Brief Description of the Drawings

[0022] Figure 1 is an exploded structural schematic diagram of the anti-needle-stick device.

[0023] Figure 2 is a structural schematic diagram of the outer sheath.

[0024] Figure 3 is a structural schematic diagram of the inner sheath.

[0025] Figure 4 is a structural schematic diagram of the U-shaped card.

[0026] Figure 5 is an overall structural schematic diagram of the anti-needle-stick device.

[0027] Figure 6 is a schematic diagram of the anti-needle-stick device in the state to be used.

[0028] Figure 7 is a schematic diagram of the use of the push rod.

[0029] Figure 8 is a schematic diagram of the instant anti-needle-stick triggered by pressing the U-shaped card.

[0030] Figure 9 is a schematic diagram of the anti-needle-stick device in the anti-needle-stick state.

[0031] The meanings of the reference numerals in the figures are as follows.

[0032] 1 Outer sheath 2 Spring

[0033] 3 Inner sheath 4 Limit sleeve

[0034] 5 U-shaped clamp 6 Position-limiting component

[0035] 7 Elastic component 8 Anti-disengagement buckle

[0036] 9 Protection edge 10 First card slot

[0037] 11 Second card slot 12 Guide slot

[0038] 13 Guide post 14 Arc contact surface

[0039] 15 Position-limiting slot 16 Pressing block

[0040] 17 Holding piece 18 Reinforcing rib

[0041] 19 Medicine liquid bottle 20 Push rod

[0042] 21 Needle body 22 Needle cap

[0043] 23 Blocking piece 24 Blocking groove Specific implementation mode

[0044] The following combines the drawings and embodiments to further describe in detail the specific implementation mode of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0045] Such as Figures 1 to 9A puncture-proof device, comprising an outer sheath 1, a spring 2 is arranged inside the outer sheath 1, an inner sheath 3 is pressed on the spring 2, and the inner sheath 3 is connected into the outer sheath 1. A bottle body assembly is arranged inside the inner sheath 3. What makes it different is that: the present invention is provided with a limit sleeve 4 with a guiding hole at the upper end of the outer sheath 1, and a U-shaped clamp 5 is movably arranged inside the limit sleeve 4. In this way, through the contact control of the U-shaped clamp 5, the subsequent puncture-proof locking function is realized. Stop components 6 are arranged mirror-symmetrically on both sides of the guiding hole of the limit sleeve 4, and an elastic component 7 is arranged on the U-shaped clamp 5, and the elastic component 7 contacts the stop component 6. In this way, the excessive insertion of the U-shaped clamp 5 can be avoided, which is convenient for providing appropriate pressing feedback stress and is beneficial to subsequent single-handed operation. Specifically, one end of the U-shaped clamp 5 constitutes a traveling end, and the other end constitutes a pressing end. At the same time, anti-detachment buckles 8 are arranged mirror-symmetrically on the front side of the traveling end of the U-shaped clamp 5, and the anti-detachment buckles 8 contact the limit sleeve 4. Thus, after assembly, the U-shaped clamp 5 can be prevented from loosening, and it does not affect its pressing use. In order to meet the temporary limitation of the inner sheath 3 during use, protective edges 9 are distributed mirror-symmetrically on the inner side of the traveling end of the U-shaped clamp 5, a first card slot 10 is arranged at the upper end of the inner sheath 3, and a second card slot 11 is arranged at the lower end of the inner sheath 3. In this way, when in use, the protective edge 9 is combined with the first card slot 10. Furthermore, in order to prevent the accidental detachment of the inner sheath 3 and to enable the inner sheath 3 to carry the bottle body assembly and be stored upward in the outer sheath 1 during puncture-proof storage, the present invention is provided with a guiding groove 12 on the outer sheath 1, and a guiding post 13 is arranged at the corresponding position of the inner sheath 3, and the guiding post 13 is embedded in the guiding groove 12. Thus, when in the puncture-proof state, the protective edge 9 is combined with the second card slot 11, and the guiding post 13 abuts against the upper end of the guiding groove 12.

[0046] Combined with a preferred embodiment of the present invention, the stop component 6 adopted is a stop block, and the elastic component 7 is an elastic strip, and the elastic strip contacts the stop block. At the same time, in order to have a better rebound and reset effect, a stop groove 15 can be arranged on the stop block, and an arc contact surface 14 is arranged on the elastic strip, and the arc contact surface 14 contacts the stop groove 15. In this way, if the force application direction is not parallel to the extension direction of the traveling end, the compression and rebound of the elastic strip can also be satisfied, and it will not be stuck or loosened. And, in order to obtain a better pressing feel, the contact area of the thumb can be increased during single-handed operation, which is convenient for timely and effectively triggering the puncture-proof state, a pressing block 16 can be arranged at the pressing end of the U-shaped clamp 5.

[0047] Furthermore, for easy one-handed grasping and better operation of the push rod 20, a holding piece 17 can be provided at the upper end of the outer sheath 1. In this way, it is convenient for the index finger and middle finger to be clasped during use. A reinforcing rib 18 can be provided between the holding piece 17 and the outer sheath 1. In this way, it will not break during force application. Considering the convenience of injection operation, the bottle assembly includes a liquid medicine bottle 19. One end of the liquid medicine bottle 19 is provided with a push rod 20, and the other end of the liquid medicine bottle 19 is provided with a needle body 21. A needle cap 22 is provided outside the needle body 21.

[0048] Moreover, to prevent the inner sheath 3 from carrying the bottle assembly forward further due to excessive hand force during use, resulting in the needle body 21 moving forward further and causing injection discomfort. A blocking piece 23 can be provided on the inner sheath 3, and a blocking groove 24 is provided at the corresponding position of the limiting sleeve 4. The blocking piece 23 is inserted into the blocking groove 24. In this way, when the push rod 20 is pressed, the acting stress is transmitted to the inner sheath 3, and then due to the cooperation of the blocking piece 23 and the blocking groove 24, the inner sheath 3 cannot move forward, achieving effective injection protection and stop position.

[0049] The working principle of the present invention is as follows:

[0050] In view of the actual assembly of the present invention, first place the spring 2 into the outer sheath 1. Then, insert the U-shaped card 5 into the limit on the outer sheath 1 and press the U-shaped card 5 until it is parallel to the inner diameter in the middle of the outer sheath 1. Then, insert the inner sheath 3 into the outer sheath 1 to compress the spring 2. During this period, the guide post 13 is embedded in the guide groove 12. After the protective edge 9 is combined with the first card slot 10, release the U-shaped card 5. Then, insert the bottle assembly into the inner sheath 3 from top to bottom.

[0051] The usage process is as follows:

[0052] After removing the needle cap 22, hold it in the same way as a conventional syringe, and inject the liquid medicine by pressing the push rod 20. After the injection is completed, press the U-shaped card 5 with the thumb. At this time, the protective edge 9 moves forward and disengages from the first card slot 10. At this time, the originally compressed spring 2 resets, pushing the inner sheath 3 and the bottle assembly upward. And, after the pressing is completed, relying on the operation of the elastic component 7, the U-shaped card 5 resets, driving the protective edge 9 to reset. While the inner sheath 3 is being pushed up, the protective edge 9 is embedded in the second card slot 11 to perform secondary limitation on the inner sheath 3. Thus, an effective anti-needle-prick function is achieved.

[0053] From the above text description and in combination with the attached drawings, it can be seen that after adopting the present invention, the following advantages are possessed:

[0054] 1. Due to the presence of the U-shaped card, the anti-needle-prick recovery function can be achieved with a simple press after use, and the operation can be completed with one hand, which is convenient to use.

[0055] 2. The inner sheath can be stored and locked through the second card slot to ensure that it does not fall off when in the stab-proof state.

[0056] 3. Spring is used for reset control without the need for additional manual force application.

[0057] 4. Through the cooperation of the guide post and the guide groove, the movement track of the inner sheath is controllable, and it will not fall out of the outer sheath even when in the extreme position, ensuring safe use.

[0058] 5. The overall structure is simple, easy to manufacture and use. If there is an assembly error, it can be easily corrected without wasting materials.

[0059] In addition, the orientation or positional relationship described in the present invention is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0060] The terms "main" and "subsidiary" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "main" and "subsidiary" may explicitly or implicitly include one or more of such features. In the description of the present invention, "several" means two or more unless otherwise specifically defined.

[0061] Similarly, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0062] In the present invention, unless otherwise clearly defined and limited, terms such as "connected" and "arranged" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. And it can be directly on another component or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0063] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0064] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A puncture-proof device, comprising an outer sheath, a spring is arranged inside the outer sheath, an inner sheath is press-fitted on the spring and the inner sheath extends into the outer sheath, and a bottle body assembly is arranged inside the inner sheath, and is characterized in that: A limiting sleeve with a guiding hole is provided at the upper end of the outer sheath. A U-shaped clamp is movably arranged inside the limiting sleeve. Stopping components are arranged in a mirror image on both sides of the guiding hole in the limiting sleeve. An elastic component is arranged on the U-shaped clamp. The elastic component contacts the stopping components. One end of the U-shaped clamp forms a traveling end, and the other end forms a pressing end. Anti-detachment buckles are arranged in a mirror image on the front side of the traveling end of the U-shaped clamp. The anti-detachment buckles contact the limiting sleeve. Protective edges are distributed in a mirror image on the inner side of the traveling end of the U-shaped clamp. A first card slot is provided at the upper end of the inner sheath, and a second card slot is provided at the lower end of the inner sheath. When in use, the protective edges are combined with the first card slot. A guiding groove is formed in the outer sheath, and a guiding post is arranged at the corresponding position of the inner sheath. The guiding post is embedded in the guiding groove. When in the anti-stabbing state, the protective edges are combined with the second card slot, and the guiding post abuts against the upper end of the guiding groove.

2. The anti-stabbing device according to claim 1, wherein: The stopping component is a stopping block, and the elastic component is an elastic card strip. The elastic card strip contacts the stopping block.

3. The anti-needle-pricking device according to claim 2, wherein: A stopping groove is provided on the stopping block, and an arc contact surface is provided on the elastic card strip. The arc contact surface contacts the stopping groove.

4. The anti-needle-pricking device according to claim 1, wherein: A pressing block is provided at the pressing end of the U-shaped clamp.

5. The anti-stabbing device according to claim 1, wherein: A holding piece is provided at the upper end of the outer sheath.

6. The anti-stabbing device according to claim 5, characterized in that: Reinforcing ribs are arranged between the holding piece and the outer sheath.

7. The anti-needle-pricking device according to claim 1, wherein: The bottle body assembly includes a liquid medicine bottle. A push rod is arranged at one end of the liquid medicine bottle, a needle body is arranged at the other end of the liquid medicine bottle, and a needle cap is arranged outside the needle body.

8. The anti-stabbing device according to claim 1, wherein: A blocking piece is arranged on the inner sheath, a blocking groove is arranged at the corresponding position of the limiting sleeve, and the blocking piece is embedded in the blocking groove.

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