Remaining needle elastic piece and assembly thereof

Abstract

The utility model relates to the technical field of medical accessories, and discloses a remaining needle shrapnel and an assembly thereof, the remaining needle shrapnel comprises a shrapnel base, a first shrapnel arm and a second shrapnel arm, the first shrapnel arm and the second shrapnel arm are respectively and oppositely connected to the shrapnel base, and an anti-scraping avoiding channel is formed between the first shrapnel arm and the second shrapnel arm. The elastic piece base is provided with a pin hole communicated with the anti-scraping avoiding channel, anti-scraping cambered surfaces are oppositely arranged at the upper end of the first elastic piece arm and the upper end of the second elastic piece arm respectively, the anti-scraping cambered surfaces and the pin hole correspond to the anti-scraping avoiding channel in position, and the anti-scraping avoiding channel is located between the anti-scraping cambered surfaces and the pin hole. According to the remaining needle elastic sheet and the assembly thereof, the contact pin is protected from being scratched, and the completeness of the periphery of the contact pin is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of medical accessories, in particular to an indwelling needle shrapnel and an assembly thereof. Background Art

[0002] Currently, in the hemodialysis industry, blood purification treatments often utilize disposable arteriovenous puncture needles. Domestic manufacturers of disposable indwelling needles are rare, and none produce indwelling needles with protective devices. Compared to conventional disposable arteriovenous puncture needles, disposable indwelling needles minimize damage to the inner walls of native arteriovenous fistulas and artificial blood vessels. Furthermore, they allow for free arm movement during treatment, reducing the risk of vascular damage. Consequently, their market share is expected to gradually increase. Indwelling needles with protective devices offer greater safety advantages than those without, making them more readily available.

[0003] When the existing stainless steel needle passes through the shrapnel of the protective device, the outer periphery of the stainless steel needle directly contacts and moves relative to the shrapnel, thereby causing the outer periphery of the stainless steel needle to be scratched. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. The utility model provides an indwelling needle spring piece and its assembly, which protects the needle from being scratched and ensures the integrity of the outer periphery of the needle.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an indwelling needle spring clip, including a spring clip base, a first spring clip arm and a second spring clip arm, the first spring clip arm and the second spring clip arm are respectively connected to the spring clip base, an anti-scratch avoidance channel is formed between the first spring clip arm and the second spring clip arm, the spring clip base is provided with a pin insertion hole connected to the anti-scratch avoidance channel, the upper end of the first spring clip arm and the upper end of the second spring clip arm are respectively arranged with anti-scratch arc surfaces, the anti-scratch arc surfaces and the pin insertion hole are respectively arranged to correspond to the positions of the anti-scratch avoidance channels, and the anti-scratch avoidance channel is located between the anti-scratch arc surface and the pin insertion hole.

[0006] As a preferred solution, the spring base includes a bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are respectively connected to the bottom plate, the pin hole is arranged on the bottom plate, the lower end of the first spring arm is connected to the first side plate, the first spring arm extends toward the second side plate, the lower end of the first spring arm is connected to the second side plate, and the second spring arm extends toward the first side plate.

[0007] As a preferred solution, the first spring arm includes a first support rod and a first baffle, one end of the first support rod is connected to the first side plate, the first support rod extends toward the second side plate, the lower end of the first baffle is connected to the upper end of the first support rod, the first baffle extends toward the first side plate, and the upper end of the first baffle is provided with the anti-scratch arc surface on the side facing the second spring arm.

[0008] As a preferred solution, the second spring arm includes a second support rod and a second baffle, one end of the second support rod is connected to the second side plate, the second support rod extends toward the first side plate, the lower end of the second baffle is connected to the upper end of the second support rod, the second baffle extends toward the second side plate, and the upper end of the second baffle is provided with the anti-scratch arc surface on the side facing the first spring arm.

[0009] As a preferred solution, the two ends of the first support rod are respectively connected to the first side of the first side plate and the first baffle in the first direction, the two ends of the second support rod are respectively connected to the second side of the second side plate and the second baffle in the first direction, and the anti-scratch avoidance channel is located between the first support rod and the second support rod in the first direction.

[0010] As a preferred solution, in the first direction, the width a of the first blocking piece is greater than the width b of the first supporting rod.

[0011] As a preferred solution, in the first direction, the width c of the second blocking piece is greater than the width d of the second support rod.

[0012] As a preferred solution, the upper end of the second baffle extends obliquely to above the first baffle, and the upper end of the first baffle and the upper end of the second baffle form a cross joint.

[0013] A retention needle spring assembly includes a protective seat body and a retention needle spring, the protective seat body is provided with a spring installation cavity, the protective seat body is provided with a first inner hole and a second inner hole arranged coaxially, the first inner hole and the second inner hole are respectively located at the two ends of the spring installation cavity and are connected to the spring installation cavity, the spring base is fixed in the spring installation cavity, the pin insertion hole is connected to the first inner hole, and the upper ends of the first spring arm and the second spring arm are respectively arranged towards the second inner hole.

[0014] As a preferred solution, it further includes an insertion pin, the outer periphery of the insertion pin protrudes to form a limiting protrusion, and the limiting protrusion is located in the spring installation cavity and is clamped in the pin hole.

[0015] Compared with the prior art, the present invention provides an indwelling needle spring clip and its assembly, which have the following advantages: the first spring clip arm and the second spring clip arm are respectively connected to the spring clip base for fixation. An anti-scratch avoidance channel is formed between the first spring clip arm and the second spring clip arm, so that the insertion needle enters the anti-scratch avoidance channel after being inserted into the spring clip from the pin insertion hole. The insertion needle does not contact the first spring clip arm and the second spring clip arm in the anti-scratch avoidance channel, thereby preventing the insertion needle from being scratched during advancement. Anti-scratch arc surfaces are arranged opposite each other at the upper end of the first spring clip arm and the upper end of the second spring clip arm, respectively. When the insertion needle needs to pass through the upper end of the first spring clip arm and the upper end of the second spring clip arm, the arc surface contacts the insertion needle. Compared with a flat surface, the arc surface can disperse the impact force over a larger area when contacting an external object, thereby reducing the pressure per unit area. At the same time, the arc surface has no sharp edges and corners, reducing the probability of damage to the outer peripheral surface of the insertion needle. When assembled with the spring, the pin passes through the pin hole, the anti-scratch channel, and the anti-scratch curved surface. This prevents scratches on the pin, which could harbor bacteria and other microorganisms and increase the risk of infection, thereby improving user safety. Furthermore, scratched pins often need to be replaced or scrapped, reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0017] Figure 2 It is a schematic cross-sectional view of the embodiment of the utility model in which the indwelling needle spring is installed in the protective seat body.

[0018] Figure 3 It is a structural schematic diagram of the indwelling needle shrapnel of an embodiment of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the indwelling needle spring piece in the first direction according to an embodiment of the utility model.

[0020] Figure 5 It is a schematic diagram of the assembly structure of the plug pin and the protective seat body according to an embodiment of the present utility model.

[0021] Figure 6 It is a schematic diagram of the assembly structure of an embodiment of the utility model in which the insertion needle is located within the indwelling needle spring.

[0022] Figure 7 It is a schematic diagram of the assembly structure of the insertion needle passing through the indwelling needle spring in an embodiment of the present utility model.

[0023] In the picture:

[0024] 10. Shrapnel base; 11. Anti-scratch avoidance channel; 12. Pinhole; 13. Anti-scratch arc surface; 14. Bottom plate; 15. First side plate; 16. Second side plate; 17. First side; 18. Second side; 19. Cross joint;

[0025] 20. First spring arm; 21. First support rod; 22. First baffle;

[0026] 30. Second spring arm; 31. Second support rod; 32. Second blocking piece;

[0027] 40. Protective seat; 41. First inner hole; 42. Second inner hole; 43. Shrapnel mounting cavity; 44. Inner seat; 45. Seat cover; 46. Insert pin; 47. Limiting protrusion.

[0028] X, first direction. DETAILED DESCRIPTION

[0029] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, it should be understood that the terms "connected," "connected," "fixed," etc. used in the present invention should be interpreted broadly. For example, the terms may refer to fixed connection, detachable connection, or integration; mechanical connection, welding connection; direct connection, indirect connection through an intermediate medium, internal communication between two elements, or interaction between two elements, unless otherwise explicitly defined. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] like Figures 1 to 7As shown, a preferred embodiment of the present utility model is a spring clip of an indwelling needle, comprising a spring clip base 10, a first spring clip arm 20 and a second spring clip arm 30. The first spring clip arm 20 and the second spring clip arm 30 are respectively connected to the spring clip base 10, and an anti-scratch avoidance channel 11 is formed between the first spring clip arm 20 and the second spring clip arm 30. The spring clip base 10 is provided with a pin insertion hole 12 connected to the anti-scratch avoidance channel 11. The upper ends of the first spring clip arm 20 and the upper ends of the second spring clip arm 30 are respectively arranged with anti-scratch arc surfaces 13. The anti-scratch arc surfaces 13 and the pin insertion hole 12 are respectively arranged to correspond to the positions of the anti-scratch avoidance channel 11, and the anti-scratch avoidance channel 11 is located between the anti-scratch arc surface 13 and the pin insertion hole 12.

[0033] A retaining needle shrapnel assembly, such as Figures 1 to 2 As shown, the device comprises a protective base 40 and an indwelling needle spring. The protective base 40 is provided with a spring mounting cavity 43. The protective base 40 is provided with a first inner hole 41 and a second inner hole 42 arranged coaxially. The first inner hole 41 and the second inner hole 42 are respectively located at the two ends of the spring mounting cavity 43 and communicate with the spring mounting cavity 43. The spring base 10 is fixed in the spring mounting cavity 43. The needle insertion hole 12 is communicated with the first inner hole 41. The upper ends of the first spring arm 20 and the second spring arm 30 are respectively arranged to face the second inner hole 42. The indwelling needle spring is fixed in the spring mounting cavity 43. After clinical puncture is completed, when the needle 46 is withdrawn to the position of the protective base 40, the second baffle 32 blocks the needle 46, and the needle 46 is enclosed in the protective base 40, improving the safety of use.

[0034] In the present invention, the indwelling needle spring clip and its assembly are secured to the spring clip base 10 by a first spring clip arm 20 and a second spring clip arm 30. A scratch-resistant escape channel 11 is formed between the first and second spring clip arms 20, 30. This allows the insertion pin 46 to enter the scratch-resistant escape channel 11 after being inserted into the spring clip through the insertion hole 12. Within the scratch-resistant escape channel 11, the insertion pin 46 avoids contact with the first and second spring clip arms 20, 30, thereby preventing scratches on the insertion pin 46 during insertion. Scratch-resistant curved surfaces 13 are disposed opposite each other at the upper ends of the first and second spring clip arms 20, 30, respectively. When the insertion pin 46 passes through the upper ends of the first and second spring clip arms 20, 30, it contacts the curved surfaces. Compared to flat surfaces, curved surfaces disperse impact forces over a larger area when contacting an external object, thereby reducing pressure per unit area. Furthermore, the lack of sharp edges and corners on the curved surfaces reduces the likelihood of damage to the outer surface of the insertion pin 46. When assembled with the spring clip, pin 46 passes through pin hole 12, anti-scratch channel 11, and anti-scratch curved surface 13 in sequence. This prevents pin 46 from being scratched, which could harbor bacteria and other microorganisms and increase the risk of infection, thereby improving user safety. Furthermore, scratched pins 46 often need to be replaced or scrapped, reducing resource waste.

[0035] In one embodiment, the insertion pin 46 is a stainless steel pin.

[0036] Further, such as Figures 3 and 4 As shown, the spring base 10 includes a base plate 14, a first side plate 17 15, and a second side plate 18 16. The first side plate 17 15 and the second side plate 18 16 are respectively connected to the base plate 14. The pin hole 12 is provided in the base plate 14. The lower end of the first spring arm 20 is connected to the first side plate 17 15. The first spring arm 20 extends toward the second side plate 18 16. The lower end of the first spring arm 20 is connected to the second side plate 18 16. The second spring arm 30 extends toward the first side plate 17 15. The first side plate 17 15 and the second side plate 18 16 are respectively connected to the base to enhance the connection stability of the first spring arm 20 and the second spring arm 30 to the base. The lower end of the first spring arm 20 is connected to the first side 17 plate 15, and the first spring arm 20 extends toward the second side 18 plate 16. The lower end of the second spring arm 30 is connected to the second side 18 plate 16, and the second spring arm 30 extends toward the first direction X, so that the first spring arm 20 and the second spring arm 30 are arranged to intersect. When assembling the pin 46, it is only necessary to gently squeeze the first side 17 plate 15 and the second side 18 plate 16 to separate the upper end of the first spring arm 20 from the upper end of the second spring arm 30 to form an outlet for the pin 46, so that the pin 46 can smoothly extend out of the spring sheet, which is simple to operate and improves assembly efficiency.

[0037] Further, such as Figures 3 and 4 As shown, the first spring arm 20 includes a first support rod 21 and a first baffle 22. One end of the first support rod 21 is connected to the first side 17 plate 15 and extends toward the second side 18 plate 16. The lower end of the first baffle 22 is connected to the upper end of the first support rod 21 and extends toward the first side 17 plate 15. The upper end of the first baffle 22, facing the second spring arm 30, is provided with an anti-scratch curved surface 13. The first baffle 22 is connected to the base via the first support rod 21, which supports the first baffle 22. The first baffle 22 is used to shield the pin 46 during retraction, preventing operators from accidentally touching the retracted pin 46 and improving user safety. The first support rod 21 extends toward the second side 18 plate 16, the lower end of the first baffle 22 is connected to the upper end of the first support rod 21, and the first baffle 22 extends toward the first side 17 plate 15, so that the first spring arm 20 and the second spring arm 30 form a clip shape, which is convenient for clamping and assembly of the pin 46.

[0038] Further, such as Figures 3 and 4As shown, the second spring arm 30 includes a second support rod 31 and a second baffle 32. One end of the second support rod 31 is connected to the second side 18 plate 16 and extends toward the first side 17 plate 15. The lower end of the second baffle 32 is connected to the upper end of the second support rod 31 and extends toward the second side 18 plate 16. The upper end of the second baffle 32, facing the first spring arm 20, is provided with an anti-scratch curved surface 13. The second baffle 32 is connected to the base via the second support rod 31, which supports the second baffle 32. The second baffle 32 is used to shield the pin 46 during retraction, preventing operators from accidentally touching the retracted pin 46 and improving user safety. The second support rod 31 extends toward the first side 17 plate 15, the lower end of the second baffle 32 is connected to the upper end of the second support rod 31, and the second baffle 32 extends toward the second side 18 plate 16, so that the first spring arm 20 and the second spring arm 30 form a clip shape, which is convenient for clamping and assembly of the pin 46.

[0039] Further, such as Figures 3 and 4 As shown, the two ends of the first support rod 21 are respectively connected to the first side 17 plate 15 and the first side 17 of the first baffle 22 in the first direction X, and the two ends of the second support rod 31 are respectively connected to the second side 18 plate 16 and the second side 18 of the second baffle 32 in the first direction X, so that an anti-scratch avoidance channel is formed between the first support rod 21 and the second support rod 31, and the anti-scratch avoidance channel 11 is located between the first support rod 21 and the second support rod 31 in the first direction X.

[0040] As one embodiment, Figures 3 and 4 As shown, the first support rod 21 , the first side 17 plate 15 and the first baffle 22 are flush on the first side 17 , and the second support rod 31 , the second side 18 plate 16 and the second baffle 32 are flush on the second side 18 .

[0041] Further, such as Figures 3 and 4 As shown, in the first direction X, the width a of the first baffle 22 is greater than the width b of the first support rod 21. The increased width of the first baffle 22 ensures a wider shielding area for the insertion pin 46, improving the protection of the indwelling needle spring. Furthermore, the first support rod 21 is designed to be relatively narrow, forming a scratch-resistant channel 11 between it and the second support rod 31. This rationally arranges the space and allows for a more compact indwelling needle spring.

[0042] Further, such as Figures 3 and 4As shown, in the first direction X, the width c of the second baffle 32 is greater than the width d of the second support rod 31. The increased width of the second baffle 32 ensures a wider shielding area for the insertion pin 46, improving the protection of the indwelling needle spring. Furthermore, the second support rod 31 is designed to be relatively narrow, forming a scratch-resistant channel 11 between it and the first support rod 21. This rationally arranges the space and allows for a more compact indwelling needle spring.

[0043] Further, such as Figures 3 and 4 As shown, the upper end of the second baffle 32 extends obliquely above the first baffle 22, forming a cross-joint 19 between the upper ends of the first baffle 22 and the second baffle 32. Due to the provision of the cross-joint 19, when the insertion needle 46 moves toward the upper end of the indwelling needle spring in the unassembled state, the second baffle 32 blocks the insertion needle 46, preventing the insertion needle 46 from passing through between the first baffle 22 and the second baffle 32, thereby improving user safety.

[0044] As one embodiment, Figures 1 to 2 As shown, the protective seat body 40 includes an inner seat body 44 and a seat body cover 45, the spring clip mounting cavity 43 and the second inner hole 42 are arranged in the inner seat body 44, the first inner hole 41 is arranged in the seat body cover 45, the seat body cover 45 is detachably connected to the inner seat body 44, and the spring clip base 10 is fixedly connected to the seat body cover 45.

[0045] Further, such as Figures 5 to 7 As shown, the device further includes an insertion pin 46, the outer periphery of which is formed with a stopper protrusion 47. The stopper protrusion 47 is located in the spring-loaded mounting cavity 43 and engages with the pin insertion hole 12. When the insertion pin 46 is retracted into the indwelling needle spring, the stopper protrusion 47 engages with the pin insertion hole 12, ensuring that the insertion pin 46 is retained in the indwelling needle spring, preventing the insertion pin 46 from falling out and improving user safety.

[0046] In summary, the present invention provides an indwelling needle spring clip and its assembly, wherein the first spring clip arm 20 and the second spring clip arm 30 are respectively connected to the spring clip base 10 for fixation. A scratch-proof avoidance channel 11 is formed between the first spring clip arm 20 and the second spring clip arm 30, so that the insertion needle 46 enters the scratch-proof avoidance channel 11 after being inserted into the spring clip through the pin insertion hole 12. The insertion needle 46 does not contact the first spring clip arm 20 and the second spring clip arm 30 in the scratch-proof avoidance channel 11, thereby preventing the insertion needle 46 from being scratched during advancement. Anti-scratch curved surfaces 13 are positioned opposite each other at the upper ends of the first and second spring arms 20, 30. When the pin 46 passes through the upper ends of the first and second spring arms 20, 30, it contacts the curved surfaces. Compared to flat surfaces, curved surfaces disperse impact forces over a larger area when contacting an external object, thereby reducing pressure per unit area. Furthermore, the lack of sharp edges reduces the probability of damage to the outer surface of the pin 46. When assembled with the spring, the pin 46 passes through the pin hole 12, the anti-scratch avoidance channel 11, and the anti-scratch curved surface 13, preventing scratches on the pin 46. These scratches can harbor bacteria and other microorganisms, increasing the risk of infection and improving user safety. Furthermore, scratched pins 46 often need to be replaced or scrapped, reducing resource waste.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A shrapnel for an indwelling needle, characterized by: It includes a spring base, a first spring arm and a second spring arm, the first spring arm and the second spring arm are respectively connected to the spring base, an anti-scratch avoidance channel is formed between the first spring arm and the second spring arm, the spring base is provided with a pin hole connected to the anti-scratch avoidance channel, the upper end of the first spring arm and the upper end of the second spring arm are respectively arranged with anti-scratch arc surfaces, the anti-scratch arc surface and the pin hole are respectively arranged to correspond to the positions of the anti-scratch avoidance channel, and the anti-scratch avoidance channel is located between the anti-scratch arc surface and the pin hole.

2. The indwelling needle shrapnel according to claim 1, characterized in that: The spring base includes a bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are respectively connected to the bottom plate, the pin hole is set on the bottom plate, the lower end of the first spring arm is connected to the first side plate, the first spring arm extends toward the second side plate, the lower end of the first spring arm is connected to the second side plate, and the second spring arm extends toward the first side plate.

3. The indwelling needle shrapnel according to claim 2, characterized in that: The first spring arm includes a first support rod and a first baffle, one end of the first support rod is connected to the first side plate, the first support rod extends toward the second side plate, the lower end of the first baffle is connected to the upper end of the first support rod, the first baffle extends toward the first side plate, and the upper end of the first baffle is provided with the anti-scratch arc surface on the side facing the second spring arm.

4. The indwelling needle shrapnel according to claim 3, characterized in that: The second spring arm includes a second support rod and a second baffle, one end of the second support rod is connected to the second side plate, the second support rod extends toward the first side plate, the lower end of the second baffle is connected to the upper end of the second support rod, the second baffle extends toward the second side plate, and the upper end of the second baffle is provided with the anti-scratch arc surface on the side facing the first spring arm.

5. The indwelling needle shrapnel according to claim 4, characterized in that: The two ends of the first support rod are respectively connected to the first side of the first side plate and the first baffle in the first direction, the two ends of the second support rod are respectively connected to the second side of the second side plate and the second baffle in the first direction, and the anti-scratch avoidance channel is located between the first support rod and the second support rod in the first direction.

6. The indwelling needle shrapnel according to claim 4, characterized in that: In the first direction, a width a of the first blocking piece is greater than a width b of the first supporting rod.

7. The indwelling needle shrapnel according to claim 4, characterized in that: In the first direction, a width c of the second blocking piece is greater than a width d of the second supporting rod.

8. The indwelling needle shrapnel according to claim 4, characterized in that: The upper end of the second baffle extends obliquely to above the first baffle, and the upper end of the first baffle and the upper end of the second baffle form a cross joint.

9. An indwelling needle shrapnel assembly, characterized in that: It includes a protective seat body and the indwelling needle spring clip according to any one of claims 1 to 8, the protective seat body is provided with a spring clip mounting cavity, the protective seat body is provided with a first inner hole and a second inner hole arranged coaxially, the first inner hole and the second inner hole are respectively located at the two ends of the spring clip mounting cavity and are connected to the spring clip mounting cavity, the spring clip base is fixed in the spring clip mounting cavity, the pin insertion hole is connected to the first inner hole, and the upper ends of the first spring clip arm and the second spring clip arm are respectively arranged towards the second inner hole.

10. The indwelling needle spring assembly according to claim 9, characterized in that: It also includes an insertion pin, the outer periphery of the insertion pin protrudes to form a limiting protrusion, and the limiting protrusion is located in the spring installation cavity and is clamped in the pin hole.

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