A new needle stick prevention device
By using a split-type spring and washer guide block structure design, the problems of complex structure and safety hazards of existing anti-needle puncture devices are solved, achieving efficient anti-needle puncture protection and reducing production costs and assembly difficulty.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN TUOREN MEDICAL DEVICE GRP
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-03
AI Technical Summary
Existing anti-needle puncture devices have complex rigid spring structures, high production costs, and are prone to problems such as incomplete or non-existent rebound, posing safety hazards.
The design employs a split structure for the spring and washer. The washer is misaligned by guide blocks and guide ramps, and the elastic positioning of the spring is used to achieve the anti-puncture function of the needle tube, preventing the needle tip from being exposed again.
It improves the material fatigue strength and service life of the device, reduces production costs, simplifies assembly, and ensures safety.
Smart Images
Figure CN224441832U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a novel needle puncture prevention device. Background Technology
[0002] With the continuous development of medical technology, puncture needles, as a commonly used medical device, are widely used in clinical treatment. However, during use, medical staff often face the risk of accidental needle pricks after use, which may not only cause physical injury but also lead to cross-infection of blood-borne diseases such as hepatitis B and AIDS, posing a serious threat to the health of medical staff.
[0003] Most existing needle-puncture prevention devices use a rigid spring structure to protect the needle tip. When in use, clinicians need to pinch the needle handle and pull out the needle tube. When the needle tube is pulled to a specific position, the spring will rebound to prevent the needle tube from passing through the channel again. The self-rebound function of the spring blocks the needle hole channel, preventing the needle tip from being exposed again and achieving the protection effect. However, existing rigid spring structures are generally special in shape and relatively complex in structure, which increases production costs and assembly difficulty. Moreover, under long-term pressure, the rigid spring structure is prone to failure to rebound properly or failure to rebound at all. Although the needle tip is shielded, it may still be exposed again under certain conditions, posing a safety hazard. Utility Model Content
[0004] Therefore, the purpose of this utility model is to provide a new type of anti-needle puncture device to address the shortcomings of the existing technology.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A novel anti-needle puncture device includes a needle tube on which an anti-needle puncture upper shell and an anti-needle puncture lower shell are mounted. The device is characterized by a spring and a washer positioned between the upper and lower shells. The upper shell, spring, washer, and lower shell are respectively provided with needle tube through-holes in the upper shell, spring, washer, and lower shell. A guide block is provided inside the lower shell to guide the movement of the washer. After the washer is guided by the guide block, the needle tube through-holes in the washer and the lower shell are misaligned. The spring is used to guide the elastic positioning of the washer after the movement.
[0007] As a further improvement of this utility model, the anti-puncture upper shell is provided with a spring mounting area for spring mounting and positioning, and the anti-puncture lower shell is provided with a gasket mounting area for gasket mounting and positioning.
[0008] As a further improvement of this utility model, before the needle is pulled out, one end of the gasket is located in the guide block and the other end is located in the gasket mounting area, and the gasket compresses the spring above.
[0009] As a further improvement of this utility model, the guide block is disposed in the gasket mounting area, and the guide block cooperates with the gasket mounting area to complete the snap-fit positioning of the gasket after the guide movement.
[0010] As a further improvement of this utility model, the guide block is provided with a guide slope for guiding the sliding of the pad and a snap-fit positioning surface for positioning the slid pad.
[0011] As a further improvement of this utility model, the upper shell needle tube through hole is opened in the spring mounting area. Before the needle tube is pulled out, the positions of the upper shell needle tube through hole, the spring needle tube through hole, the gasket needle tube through hole, and the lower shell needle tube through hole are corresponding.
[0012] As a further improvement of this utility model, the spring mounting area is a limiting groove structure.
[0013] As a further improvement of this utility model, the end of the spring that mates with the anti-needle puncture upper shell is a tapered structure, and the tapered structure narrows to form a spring needle tube through hole, which is a limiting hole.
[0014] As a further improvement of this utility model, the end of the needle tube is provided with a limiting indentation.
[0015] As a further improvement of this utility model, the diameter of the limiting indentation is smaller than the diameter of the through hole of the gasket needle tube and the through hole of the lower shell needle tube, and the diameter of the limiting indentation is larger than the diameter of the through hole of the spring needle tube.
[0016] The beneficial effects of this utility model are:
[0017] 1. This utility model provides a novel needle puncture prevention device. Through the cooperation of the gasket and the guide block structure on the device housing, after the needle passes through the gasket, the gasket slides along the guide block under the action of the spring, thereby causing the gasket to be misaligned with the needle through hole on the housing, and the needle tip cannot be punctured again, thus achieving the needle puncture prevention function and protecting medical personnel.
[0018] 2. In this utility model, the spring, which serves as the elastic device, and the gasket, which serves as the needle tip protection device, are separate structures. Compared with the rigid spring sheet structure in the prior art, where the elastic device and the needle tip protection device are designed as an integral piece, the separate structure of this utility model has higher material fatigue strength, improved mechanical strength, and a longer service life.
[0019] 3. This utility model uses a gasket and a spring as moving parts to complete the anti-puncture function of the puncture needle. Compared with the rigid spring structure commonly used in existing patents, the gasket and spring structure is simple, easy to assemble, reduces production costs and processing difficulty, and is more suitable for mass industrial production. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Appendix Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0022] Appendix Figure 2 This is an exploded view of the overall structure of this utility model.
[0023] Appendix Figure 3 This is a cross-sectional view of the overall structure of the present invention before the needle is removed.
[0024] Appendix Figure 4 This is a cross-sectional view of the overall structure of the present invention after the needle is removed.
[0025] Appendix Figure 5 This is a partial cross-sectional view of the structure of this utility model before the needle is removed.
[0026] Appendix Figure 6 This is a partial cross-sectional view of the structure of this utility model after the needle is removed.
[0027] Appendix Figure 7 This is a schematic diagram of the front end structure of the needle tube component of this utility model.
[0028] Appendix Figure 8 This is a schematic diagram of the spring component structure of this utility model.
[0029] Appendix Figure 9 This is a schematic diagram of the gasket component of this utility model.
[0030] Appendix Figure 10 This is a schematic diagram of the anti-needle puncture lower shell component of this utility model.
[0031] In the diagram: 1 is the needle tube, 101 is the limiting indentation, 2 is the anti-needle puncture upper shell, 201 is the needle tube through hole in the upper shell, 202 is the spring mounting area, 3 is the spring, 301 is the spring needle tube through hole, 4 is the gasket, 401 is the gasket needle tube through hole, 5 is the anti-needle puncture lower shell, 501 is the needle tube through hole in the lower shell, 502 is the guide block, and 503 is the gasket mounting area.
[0032] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. For better illustration, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation
[0033] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0034] like Figure 2 As shown, a novel anti-needle puncture device includes a needle tube 1, on which an anti-needle puncture upper shell 2 and an anti-needle puncture lower shell 5 are mounted. The device is characterized by a spring 3 and a washer 4 disposed between the anti-needle puncture upper shell 2 and the anti-needle puncture lower shell 5. The spring 3 is positioned above the washer 4. The anti-needle puncture upper shell 2, spring 3, washer 4, and anti-needle puncture lower shell 5 are respectively provided with an upper shell needle tube through-hole 201, a spring needle tube through-hole 301, a washer needle tube through-hole 401, and a lower shell needle tube through-hole 501 for the needle tube 1 to pass through. A guide block 502 is provided inside the anti-needle puncture lower shell 5 to guide the movement of the washer 4. After the washer 4 is guided to move by the guide block 502, the washer needle tube through-hole 401 and the lower shell needle tube through-hole 501 become misaligned. The spring 3 is used to guide the elastic positioning of the washer 4 after movement and to provide the power for the movement of the washer 4.
[0035] In one specific embodiment, the anti-puncture upper shell 2 is further provided with a spring mounting area 202 for mounting and positioning the spring 3, and the anti-puncture lower shell 5 is provided with a gasket mounting area 503 for mounting and positioning the gasket 4.
[0036] In one specific embodiment, further, before the needle tube 1 is pulled out, one end of the pad 4 is located at the guide block 502 and the other end is located at the pad mounting area 503. The pad 4 is in an inclined state and compresses the spring 3 located above the pad 4.
[0037] In a specific embodiment, the guide block 502 is further disposed in the gasket mounting area 503. The guide block 502 cooperates with the gasket mounting area 503 to complete the snap-fit positioning of the gasket 4 after the guiding movement, so as to prevent the gasket 4 from sliding in the gasket mounting area 503.
[0038] In one specific embodiment, the guide block 502 is further provided with a guide slope for guiding the sliding of the pad 4 and a snap-fit positioning surface for positioning the slid-out pad 4.
[0039] In a specific embodiment, the upper shell needle tube through hole 201 is further provided in the spring mounting area 202. Before the needle tube is pulled out, the upper shell needle tube through hole 201, the spring needle tube through hole 301, the gasket needle tube through hole 401, and the lower shell needle tube through hole 501 are in corresponding positions.
[0040] In one specific embodiment, the spring mounting area 202 is further defined as a limiting groove structure to prevent the spring 3 from moving.
[0041] In a specific embodiment, the end of the spring 3 that mates with the anti-needle puncture upper shell 2 is a tapered structure. The tapered structure narrows to form a spring needle tube through hole 301, which is a limiting hole used to prevent the needle tube 1 from detaching from the anti-needle puncture device.
[0042] In one specific embodiment, the end of the needle tube 1 is provided with a limiting indentation 101 that cooperates with the spring needle tube through hole 301 to limit the movement of the needle tube 1.
[0043] In one specific embodiment, the diameter of the limiting indentation 101 is smaller than the diameter of the gasket needle tube through hole 401 and the lower shell needle tube through hole 501, and the diameter of the limiting indentation 101 is larger than the diameter of the spring needle tube through hole 301.
[0044] The operating steps of this device are as follows: After the needle puncture is completed, pinch the needle handle and pull the needle tube 1 outward. The limiting indentation 101 at the end of the needle tube 1 passes through the lower shell needle tube through hole 501 and the pad needle tube through hole 401 in sequence, reaching the spring needle tube through hole 301. Since the diameter of the limiting indentation 101 is larger than that of the spring needle tube through hole 301, the needle tube 1 is limited and cannot be pulled out further. At the same time, due to the pulling out of the needle tube 1, the limiting of the needle tube 1 in the pad needle tube through hole 401 is no longer present, and the compressed spring 3 returns to its original position. The spring pushes the gasket 4 to slide along the guide ramp on the guide block 502 and finally fall into the gasket mounting area 503. At this time, due to the movement of the gasket 4, the needle tube through hole 501 of the lower shell and the needle tube through hole 401 of the gasket are misaligned. At this time, the gasket 4 blocks the needle tube through hole 501 of the lower shell, and the anti-needle puncture lower shell 5 blocks the needle tube through hole 401 of the gasket. Under the elastic force of the spring 3 and the locking action of the guide block 502 and the positioning surface, the gasket 4 will not move, and the needle tube 1 can no longer puncture, thus achieving the anti-needle puncture function.
[0045] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.
[0046] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A new type of needle stick prevention device comprising a needle tube (1) on which a needle stick prevention upper shell (2) and a needle stick prevention lower shell (5) are mounted in cooperation, characterized in that, A spring (3) and a pad (4) are provided between the anti-needle puncture upper shell (2) and the anti-needle puncture lower shell (5). The anti-needle puncture upper shell (2), spring (3), pad (4) and anti-needle puncture lower shell (5) are respectively provided with needle tube through hole (201) of upper shell, needle tube through hole (301) of spring, needle tube through hole (401) of pad and needle tube through hole (501) of lower shell. A guide block (502) is provided inside the anti-needle puncture lower shell (5) to guide the movement of pad (4). After the pad (4) is guided to move by the guide block (502), the needle tube through hole (401) of pad and the needle tube through hole (501) of lower shell are misaligned. The spring (3) is used to guide the elastic positioning of pad (4) after movement.
2. The novel needle stick prevention device of claim 1, wherein, The anti-puncture upper shell (2) is provided with a spring mounting area (202) for the installation and positioning of the spring (3), and the anti-puncture lower shell (5) is provided with a gasket mounting area (503) for the installation and positioning of the gasket (4).
3. The novel needle stick prevention device of claim 2, wherein, Before the needle (1) is pulled out, one end of the pad (4) is located at the guide block (502) and the other end is located at the pad mounting area (503), and the pad (4) compresses the spring (3) above.
4. The novel needle stick prevention device of claim 2, wherein, The guide block (502) is disposed in the gasket mounting area (503). The guide block (502) and the gasket mounting area (503) cooperate to complete the snap-fit positioning of the gasket (4) after the guide movement.
5. The novel needle stick prevention device of claim 4, wherein, The guide block (502) is provided with a guide slope for the sliding of the guide pad (4) and a snap-fit positioning surface for positioning the sliding pad (4).
6. The novel needle stick prevention device of claim 2, wherein, The upper shell needle tube through hole (201) is opened in the spring mounting area (202). Before the needle tube (1) is pulled out, the upper shell needle tube through hole (201), the spring needle tube through hole (301), the gasket needle tube through hole (401), and the lower shell needle tube through hole (501) are in corresponding positions.
7. The novel needle stick prevention device of claim 2, wherein, The spring mounting area (202) is a limiting groove structure.
8. The novel anti-needle puncture device according to claim 1, characterized in that, The end of the spring (3) that mates with the anti-needle puncture upper shell (2) is a tapered structure. The tapered structure narrows to form a spring needle tube through hole (301), which is a limiting hole.
9. The novel needle stick prevention device of claim 1, wherein, The end of the needle tube (1) is provided with a limiting indentation (101).
10. The novel needle stick prevention device of claim 9, wherein, The diameter of the limiting indentation (101) is smaller than the diameter of the gasket needle tube through hole (401) and the lower shell needle tube through hole (501), while the diameter of the limiting indentation (101) is larger than the diameter of the spring needle tube through hole (301).