Peripheral nerve stimulation needle structure
By adopting a split needle holder structure and precise positioning design, the problems of contamination and damage of needle tubes and wires during peripheral nerve stimulation needle processing are solved, and the product pass rate and production efficiency are improved.
Patent Information
- Application Number
- CN202421224412.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-05-31
AI Technical Summary
During the processing of existing peripheral nerve stimulation needles, the needle tubes and wires are susceptible to contamination and damage, and are difficult to accurately locate, resulting in low product pass rate and production efficiency.
The split needle holder structure is adopted. The needle holder is first injection molded, and then the needle tube and the wire are installed and positioned. By setting a positioning plate, connecting column and corresponding positioning hole on the rear seat, the precise positioning of the needle tube and the wire is ensured.
It effectively avoids contamination and damage of needle tubes and wires during processing, ensures their accurate positioning, and significantly improves the product's pass rate and production efficiency.
Smart Images
Figure CN222788316U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a peripheral nerve stimulation needle structure. Background Art
[0002] As a medical device used for peripheral nerve blockade, the peripheral nerve stimulator needle is often used in conjunction with a nerve stimulator. Its working principle is to release an electric current of a specific intensity and frequency through the needle tip to induce a motor response in the muscle groups controlled by the nerve, thereby assisting doctors in accurately locating the peripheral nerves to be blocked. Therefore, it is quite popular in clinical applications.
[0003] During the manufacturing process, the surface of the needle tube of the peripheral nerve stimulation needle needs to be insulated, and its surface needs to be connected to the wire to transmit electrical signals. The needle seat is wrapped around the connection between the needle tube and the wire to achieve positioning and protection.
[0004] Traditional peripheral nerve stimulation needles adopt an integrated structure and are manufactured through insert injection molding technology, that is, the insulated needle tube and the wire are connected to form a wire injection needle, which is then placed in an injection mold for injection molding. However, during the molding process of this structure, the needle tube and the wire are directly exposed to the injection molding machine and the injection molding material, resulting in the following problems: (1) The surface of the needle tube and the wire are easily contaminated; (2) The insulation layer on the surface of the needle tube is easily damaged and falls off due to pressure; (3) The wire is easily damaged; (4) The needle tube and the wire are easily deviated due to impact during injection molding; (5) The wire is long and difficult to position. Given the irreversibility of the injection molding process, once the above problems occur, they are difficult to remedy, and ultimately lead to the overall scrapping of the product, seriously affecting the product's qualification rate and production efficiency.
[0005] Therefore, providing a new peripheral nerve stimulation needle structure to avoid contamination and damage to the needle tube and the wire during processing and ensure their accurate positioning has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content
[0006] The technical problem to be solved by the utility model is to provide a peripheral nerve stimulation needle structure which can effectively avoid direct contact between the needle tube and the guide wire and the injection molding machine and the injection molding material during processing, while ensuring the accurate positioning of the needle tube and the guide wire, so as to improve production efficiency and finished product qualification rate.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] A peripheral nerve stimulation needle structure, comprising a needle tube, a guide wire and a needle seat, is characterized by:
[0009] The needle seat comprises a rear seat and a front cover, the rear seat is provided with a positioning plate facing the front cover, the front cover is provided with a receiving cavity with a rear opening, the opening end of the receiving cavity abuts against the positioning plate, and the positioning plate is provided with a wire entry hole for the wire to extend into the receiving cavity;
[0010] A connecting column for docking the front cover is fixedly provided in front of the positioning plate, and a first positioning hole is opened backward at the front end of the connecting column. Correspondingly, a second positioning hole coaxial with the first positioning hole is opened forward through the front end of the accommodating cavity, and one end of the needle tube is fixed in the first positioning hole, and the other end passes through the second positioning hole forward and extends out of the front cover;
[0011] A mounting sleeve is extended backward from the front end of the accommodating cavity and is sleeved with the connecting column. A strip groove with a rear opening is provided on one side of the mounting sleeve facing the wire entry hole along the front-to-back direction. One end of the wire passes through the wire entry hole and the strip groove in sequence and is connected to the needle tube between the first positioning hole and the second positioning hole.
[0012] A first anti-slipping piece is arranged on the connecting column, and a second anti-slipping piece is arranged on the mounting sleeve. The first anti-slipping piece and the second anti-slipping piece can cooperate with each other to prevent the mounting sleeve from being detached from the connecting column.
[0013] The technical problem to be solved by the utility model can be further achieved through the following steps: the first anti-slip component is an anti-slip clamp fixedly arranged around the outer wall of the connecting column, and the cross-section of the anti-slip clamp is semicircular; the second anti-slip component is an annular clamping groove correspondingly opened on the peripheral wall of the inner cavity of the installation sleeve; the anti-slip clamp can be embedded in the annular clamping groove to block each other and prevent the installation sleeve from falling off the connecting column.
[0014] The technical problem to be solved by the utility model can be further achieved by the following steps: an anti-rotation groove is provided on the positioning plate of the rear seat toward the front cover, an anti-rotation block matching the anti-rotation groove is provided on the front cover, and the anti-rotation block can be embedded in the anti-rotation groove to block each other and prevent the front cover from rotating relative to the rear seat.
[0015] The technical problem to be solved by the utility model can be further achieved through the following steps: the wire entry hole is arranged between the anti-rotation groove and the connecting column.
[0016] The technical problem to be solved by the utility model can be further achieved by the following steps: the wire entry hole includes a front hole and a rear hole that are connected in one piece, the aperture of the rear hole is set corresponding to the outer diameter of the wire, the front hole is trumpet-shaped, and the aperture of the front end of the front hole is larger than the aperture of the rear hole.
[0017] The technical problem to be solved by the utility model can be further achieved through the following steps: a connector for docking the infusion tube is fixedly provided behind the positioning plate of the rear seat, the first positioning hole on the connecting column is connected to the connector, and the connecting head and the connecting column are both coaxially arranged with the first positioning hole.
[0018] The technical problem to be solved by the utility model can be further achieved by the following steps: a strip groove is provided on the side of the installation sleeve facing the wire entry hole and the side facing away from the wire entry hole.
[0019] Compared with the prior art, the utility model allows the needle seat to be injection molded first and then the needle tube and the wire to be installed and positioned by setting the needle seat as a split structure of a rear seat and a front cover, thereby ensuring that the needle tube and the wire do not contact the injection mold and the injection molding machine during the processing, effectively avoiding impact, contamination and damage to the needle tube and the wire; by arranging a positioning plate, a connecting column and a corresponding first positioning hole on the rear seat, and arranging a second positioning hole coaxial with the first positioning hole on the front cover, accurate positioning of the needle tube and the wire during installation is ensured; the utility model significantly improves the product qualification rate and production efficiency, and ensures the overall quality and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0021] Figure 2 It is a front cross-sectional view of the utility model as a whole;
[0022] Figure 3 This is a schematic diagram of the structure of the rear seat of the utility model;
[0023] Figure 4 This is a front sectional view of the rear seat of the utility model;
[0024] Figure 5 It is a structural schematic diagram of the front cover of the utility model;
[0025] Figure 6 This is a front sectional view of the front cover of the utility model;
[0026] Figure 7 It is a top sectional view of the front cover of the utility model;
[0027] In the figure: 1-rear seat; 2-conductor wire; 3-front cover; 4-needle tube; 5-sheath;
[0028] 11-positioning plate; 12-wire entry hole; 13-connecting column; 14-first positioning hole; 15-anti-dropping clamp ring; 16-anti-rotation groove; 17-connector; 31-accommodating cavity; 32-second positioning hole; 33-installation sleeve; 34-strip groove; 35-annular clamping groove; 36-anti-rotation block; 37-inner inclined surface;
[0029] 121-front hole; 122-back hole. DETAILED DESCRIPTION
[0030] The specific technical solutions of the present invention are further described below so that those skilled in the art can further understand the present invention, but it does not constitute a limitation on the rights thereof.
[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.
[0032] Please refer to Figure 1-7 A peripheral nerve stimulation needle structure includes a needle tube 4, a wire 2 and a needle seat, wherein the needle seat is a split assembly structure, including a rear seat 1 and a front cover 3. A positioning plate 11 facing the front cover 3 is provided on the rear seat 1, and the front cover 3 is provided with a accommodating cavity 31 with a rear opening. After the assembly is completed, the open end of the accommodating cavity 31 abuts against the positioning plate 11. The positioning plate 11 is provided with a wire entry hole 12 for the wire 2 to extend into the accommodating cavity 31.
[0033] A connecting column 13 for docking with the front cover 3 is fixed in front of the positioning plate 11, and a first positioning hole 14 is opened backward at the front end of the connecting column 13. Correspondingly, a second positioning hole 32 coaxial with the first positioning hole 14 is opened forward through the front end of the accommodating cavity 31. One end of the needle tube 4 is fixed in the first positioning hole 14, and the other end passes through the second positioning hole 32 forward and extends out of the front cover 3. The first positioning hole 14 is a two-stage special-shaped hole, the aperture of the rear section corresponds to the needle tube 4, which is convenient for positioning the needle tube 4, and the aperture of the front section is slightly larger than the needle tube 4, which is convenient for injecting glue into the needle tube 4 during assembly to fix the needle tube 4. Correspondingly, the aperture of the second positioning hole 32 is also slightly larger than the needle tube 4, which is also convenient for glue injection and fixation.
[0034] In order to ensure that the front cover 3 can be stably installed on the rear seat 1, a mounting sleeve 33 is extended backward from the front end of the accommodating cavity 31. The mounting sleeve 33 is a cylindrical sleeve, and the size of its inner cavity corresponds to the connecting column 13, and can be sleeved with the connecting column 13. The mounting sleeve 33 is provided with a strip groove 34 along the front-to-back direction on the side facing the wire entry hole 12. After the assembly is completed, one end of the wire 2 passes through the wire entry hole 12 and the strip groove 34 in turn and is connected to the needle tube 4 between the first positioning hole 14 and the second positioning hole 32. In order to prevent the mounting sleeve 33 from interfering with the wire 2 during assembly, an opening is left behind the strip groove 34. After the assembly is completed, a gap should be left between the bottom of the strip groove 34 and the end face of the connecting column 13 for the wire 2 to enter.
[0035] A first anti-slip piece is provided on the connecting column 13, and a second anti-slip piece is provided on the mounting sleeve 33. The first anti-slip piece and the second anti-slip piece can cooperate with each other to prevent the mounting sleeve 33 from detaching from the connecting column 13, thereby axially fixing the assembled front cover 3 and rear seat 1.
[0036] Furthermore, the first anti-slipping member is an anti-slipping clamp 15 fixedly arranged around the outer wall of the connecting column 13, and the cross section of the anti-slipping clamp 15 is semicircular. The second anti-slipping member is an annular clamping groove 35 correspondingly opened on the inner wall of the mounting sleeve 33, and the anti-slipping clamp 15 can be embedded in the annular clamping groove 35 to block each other and prevent the mounting sleeve 33 from axially displacing relative to the connecting column 13 and slipping off the connecting column 13. Correspondingly, an inner inclined surface 37 is provided at the rear end of the mounting sleeve 33 to facilitate the entry of the anti-slipping clamp 15.
[0037] The shapes of the first anti-slipping member and the second anti-slipping member may be other shapes besides semicircle, such as triangle, trapezoid, etc., as long as they can be assembled smoothly and achieve the stopping effect.
[0038] Furthermore, an anti-rotation groove 16 is provided on the positioning plate 11 of the rear seat 1 toward the front cover 3, and an anti-rotation block 36 matching the anti-rotation groove 16 is provided on the front cover 3. The anti-rotation block 36 can be embedded in the anti-rotation groove 16 to block each other and prevent the front cover 3 from rotating relative to the rear seat 1.
[0039] Furthermore, the wire entry hole 12 is arranged between the anti-rotation groove 16 and the connecting column 13, so as to facilitate the positioning and adjustment of the needle tube 4 during assembly. The wire entry hole 12 includes a front hole 121 and a rear hole 122 which are connected in one piece, wherein the aperture of the rear hole 122 is arranged corresponding to the outer diameter of the wire 2, so as to achieve a better positioning effect. The front hole 121 is trumpet-shaped, and the aperture of the front end thereof is larger than the aperture of the rear hole 122, so as to facilitate the injection of glue into the interior during assembly to fix the wire 2. In order to improve the fixing effect, as Figure 3-4 As shown, the peripheral wall of the front hole 121 can extend forward to the outside of the positioning plate 11 .
[0040] Furthermore, a connector 17 is fixedly provided behind the positioning plate 11 of the rear seat 1, and the first positioning hole 14 on the connecting column 13 is connected to the connector 17, and the connector 17 and the connecting column 13 are both coaxially arranged with the first positioning hole 14. The connector 17 is provided with a tapered hole with a taper of 6%, which is convenient for docking the infusion tube and connecting the needle tube 4 to supply liquid.
[0041] Furthermore, strip grooves 34 are provided on both the side of the installation sleeve 33 facing the wire entry hole 12 and the side away from the wire entry hole 12. Therefore, during the installation process, when the installation sleeve 33 is sleeved along the axial direction of the connecting column 13, due to the presence of the anti-dropping clamping ring 15 provided on the connecting column 13, the inner cavity wall of the installation sleeve 33 will be expanded and deformed by the radial force of the clamping ring. By designing two strip grooves 34 at specific positions of the installation sleeve 33, these notches provide additional deformation space for the installation sleeve, thereby allowing the installation sleeve to expand more evenly and smoothly when squeezed by the clamping ring, thereby making the assembly process of the installation sleeve and the connecting column smoother.
[0042] Working principle: The utility model provides a peripheral nerve stimulation needle structure, and its assembly steps are as follows:
[0043] First, the rear seat 1 and the front cover 3 are respectively molded on an injection molding machine. Then, the tail end of the needle tube 4 is placed into the first positioning hole 14 of the connecting column 13 of the rear seat 1, ensuring that the needle tip blade is aligned with the anti-rotation groove 16 on the positioning plate 11, and glue is injected into the first positioning hole 14 for preliminary fixation.
[0044] Next, one end of the wire 2 is passed through the wire entry hole 12 on the positioning plate 11 from the rear and fixed on the needle tube 4 , and then glue is injected into the wire entry hole 12 to complete the fixation of the wire 2 .
[0045] Afterwards, the front cover 3 is sleeved on the needle tip of the needle tube 4, the anti-rotation block 36 is aligned with the anti-rotation groove 16 on the positioning plate 11, the installation sleeve 33 is aligned with the connecting column 13 of the rear seat 1, and then the front cover 3 is pulled backward until it abuts against the positioning plate 11. At this time, the anti-dropping clamp ring 15 and the annular clamping groove 35 stop each other to achieve axial limitation, and the anti-rotation block 36 and the anti-rotation groove 16 stop each other to achieve circumferential limitation.
[0046] After completing the above steps, inject a proper amount of glue into the second positioning hole 32 of the front cover 3 to fix the needle tube 4 for the second time. After the glue is cured, perform necessary surface treatment on the exposed part of the needle tube 4, and put on the sheath 5 to complete the assembly of the entire product.
[0047] The utility model allows the needle seat to be injection molded first, and then the needle tube 4 and the wire 2 are installed and positioned by setting the needle seat as a split structure of the rear seat 1 and the front cover 3, ensuring that the needle tube 4 and the wire 2 do not contact the injection mold and the injection molding machine during the processing, effectively avoiding the impact, contamination and damage to the needle tube 4 and the wire 2. By setting the positioning plate 11, the connecting column 13 and the corresponding first positioning hole 14 on the rear seat 1, and setting the second positioning hole 32 coaxial with the first positioning hole 14 on the front cover 3, the precise positioning of the needle tube 4 and the wire 2 during installation is ensured. The utility model significantly improves the product qualification rate and production efficiency, and ensures the overall quality and reliability of the product.
[0048] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
Claims
1. A peripheral nerve stimulation needle structure, comprising a needle tube, a guide wire and a needle seat, characterized in that: The needle seat comprises a rear seat and a front cover, the rear seat is provided with a positioning plate facing the front cover, the front cover is provided with a receiving cavity with a rear opening, the opening end of the receiving cavity abuts against the positioning plate, and the positioning plate is provided with a wire entry hole for the wire to extend into the receiving cavity; A connecting column for docking the front cover is fixedly provided in front of the positioning plate, and a first positioning hole is opened backward at the front end of the connecting column. Correspondingly, a second positioning hole coaxial with the first positioning hole is opened forward through the front end of the accommodating cavity, and one end of the needle tube is fixed in the first positioning hole, and the other end passes through the second positioning hole forward and extends out of the front cover; A mounting sleeve is extended backward from the front end of the accommodating cavity and is sleeved with the connecting column. A strip groove with a rear opening is provided on one side of the mounting sleeve facing the wire entry hole along the front-to-back direction. One end of the wire passes through the wire entry hole and the strip groove in sequence and is connected to the needle tube between the first positioning hole and the second positioning hole. A first anti-slipping piece is arranged on the connecting column, and a second anti-slipping piece is arranged on the mounting sleeve. The first anti-slipping piece and the second anti-slipping piece can cooperate with each other to prevent the mounting sleeve from being detached from the connecting column.
2. The peripheral nerve stimulation needle structure according to claim 1, characterized in that: The first anti-slip component is an anti-slip clamp fixedly arranged around the outer wall of the connecting column, and the cross-section of the anti-slip clamp is semicircular. The second anti-slip component is an annular clamping groove correspondingly opened on the peripheral wall of the inner cavity of the installation sleeve. The anti-slip clamp can be embedded in the annular clamping groove to block each other and prevent the installation sleeve from falling off the connecting column.
3. The peripheral nerve stimulation needle structure according to claim 1 or 2, characterized in that: An anti-rotation groove is arranged on the positioning plate of the rear seat toward the front cover, and an anti-rotation block matching the anti-rotation groove is arranged on the front cover. The anti-rotation block can be embedded in the anti-rotation groove to block each other and prevent the front cover from rotating relative to the rear seat.
4. The peripheral nerve stimulation needle structure according to claim 3, characterized in that: The wire entry hole is arranged between the anti-rotation groove and the connecting column.
5. The peripheral nerve stimulation needle structure according to claim 1, characterized in that: The wire entry hole comprises a front hole and a rear hole which are connected in an integral manner. The aperture of the rear hole is set corresponding to the outer diameter of the wire. The front hole is trumpet-shaped, and the aperture of the front end of the front hole is larger than the aperture of the rear hole.
6. The peripheral nerve stimulation needle structure according to claim 1, characterized in that: A connector for docking the infusion tube is fixedly provided behind the positioning plate of the rear seat, and the first positioning hole on the connecting column is connected to the connector, and the connector and the connecting column are both coaxially arranged with the first positioning hole.
7. The peripheral nerve stimulation needle structure according to claim 1, characterized in that: Strip grooves are arranged on one side of the installation sleeve facing the wire entry hole and on the other side facing away from the wire entry hole.