Connector, extension lead, implantable nerve stimulation system and assembly method

Abstract

The invention discloses a connector, an extension wire, an implantable nerve stimulation system and an assembly method, and belongs to the technical field of medical instruments. The connector comprises a circuit board module, the circuit board module comprises a main body, the main body is internally provided with a plug-in channel for an electrode wire to be inserted, a plurality of conductive elements arranged in the plug-in channel and a water seal structure, and the water seal structure and the conductive elements are arranged at intervals in the axial direction. A flow channel for forming the water seal structure is formed in the side wall of the main body in a penetrating manner; the shell is manufactured in a rubber coating mode, and the shell and the multiple water seal structures are integrally formed through the flow channels. According to the invention, the assembly difficulty of the circuit board module is reduced, the manufacturing process of the connector is simplified, and the sealing performance of the connector is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a connector, an extension wire, an implantable neural stimulation system and an assembly method. Background Art

[0002] With the continuous improvement of user needs, neuroelectrical stimulation is a commonly used method for the treatment of neurological disorders and rehabilitation of neurological injuries. The neuroelectrical stimulation system applies electrical stimulation to relevant parts through pulse generators and electrodes implanted in the body. Among them, the pulse generator is mainly used to generate electrical stimulation, and the electrical stimulation signal is released to the patient's brain through the stimulation electrode to help the patient recover.

[0003] The pulse generator and the electrode are connected through an extension wire, one end of which is inserted into the channel module of the pulse generator, and the other end is connected to the electrode wire. The front end of the connector is a silicone tube, and the wire of the extension wire passes through the silicone tube and extends out of the tube mouth. The rear end of the connector is a circuit board module, and a plug-in channel for the electrode is formed on the circuit board module. A plurality of terminals are arranged along the extension direction of the plug-in channel, and the terminals are connected to the electrodes inserted into the plug-in channel through springs or screws. A plurality of water seal structures are also arranged in the circuit board module, and a water seal structure is arranged between two adjacent springs. The plurality of water seal structures are arranged along the extension direction of the plug-in channel, and the electrode can pass through the plurality of water seal structures to prevent body fluids from entering the connector during the process of implanting the connector into the human body.

[0004] In the related art, the circuit board module is assembled from two modules, the upper and lower modules, and a cavity for accommodating the spring and the water seal structure is formed between the upper and lower modules. Only when the upper and lower modules are assembled together accurately can the performance and sealing of the connector meet the requirements. This increases the difficulty of assembling the circuit board module and is not conducive to the mass production of connectors.

[0005] Therefore, there is an urgent need to provide a connector, an extension wire, an implantable neural stimulation system and an assembly method to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a connector, an extension wire, an implantable neural stimulation system and an assembly method to reduce the difficulty of assembling a circuit board module, simplify the manufacturing process of the connector, and improve the sealing performance of the connector.

[0007] In order to achieve the above objectives, the following technical solutions are provided:

[0008] A connector, comprising:

[0009] A circuit board module, the circuit board module comprising a main body, the main body is provided with an insertion channel for inserting an electrode wire, a plurality of conductive elements arranged in the insertion channel and a water seal structure axially spaced from the conductive elements, and a flow channel for forming the water seal structure is opened through a side wall of the main body;

[0010] The shell is made by rubber coating, and the shell is integrally formed with the plurality of water seal structures through the flow channel.

[0011] As an optional solution of the connector, the height of the flow channel in the thickness direction of the main body is greater than the diameter of the plug-in channel.

[0012] As an optional solution for the connector, the conductive element is an annular spring, the circuit board module also includes a first terminal, the main body is provided with a placement groove, the annular spring is accommodated in the placement groove, the first terminal is clamped in the placement groove and is in electrical contact with the annular spring.

[0013] As an optional solution of the connector, the first terminal is in an arched structure, and the first terminal includes a first abutting section, a middle section, and a second abutting section that are connected.

[0014] As an optional solution for the connector, the placement groove is provided with bearing bosses protruding from two inner wall surfaces relative to each other, and the inner wall surface of the middle section abuts against the outer wall surface of the bearing bosses.

[0015] As an optional solution for the connector, the circuit board module also includes a first cold-pressed tube and a first connecting wire. The upper surface of the main body is recessed with a first limiting groove and a second limiting groove. The first cold-pressed tube is arranged in the first limiting groove, and the first connecting wire is arranged in the second limiting groove. One end of the first connecting wire is connected to the first cold-pressed tube, and the other end of the first connecting wire is connected to the first terminal.

[0016] As an optional solution for the connector, the circuit board module also includes a locking piece and a screw. The side wall of the main body is recessed with a mounting groove, and the locking piece is embedded in the mounting groove. The locking piece is provided with a connecting through hole and a screw hole. The through hole is coaxially arranged with the plug-in channel, and the screw is threadedly connected to the screw hole and stopped on the electrode wire. The upper surface of the main body is provided with an avoidance notch, and the locking piece is protruding with a second terminal located in the avoidance notch.

[0017] As an optional solution of the connector, the head of the screw is provided with an insulating cap.

[0018] As an optional solution for the connector, an annular limiting protrusion is protruded inside the socket of the water seal structure.

[0019] An extension wire comprises the above-mentioned connector.

[0020] An implantable neural stimulation system comprises a pulse generator, an electrode wire and an extension wire as described in any one of the above items, wherein the pulse generator is connected to the electrode wire via the extension wire.

[0021] The assembly method, used to assemble the above mentioned connector, comprises the following steps:

[0022] Placing a circuit board module with a plurality of conductive components installed thereon in a casting jig;

[0023] A pin having the same shape as the electrode wire passes through the flow channel and the conductive element and is inserted into the plug-in channel of the circuit board module;

[0024] Injecting glue into the casting jig, the glue flows into the flow channel and is left to stand for a set time to form an integrated shell and water seal structure;

[0025] Pull out the Pin from the insertion channel.

[0026] As an optional solution for the assembly method, a plurality of annular grooves are recessed at intervals on the outer wall surface of the Pin needle, and the annular grooves are located at positions within the flow channel.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In the connector provided by the present invention, a plurality of flow channels for forming a water seal structure are arranged in the main body of the circuit board module. Before the shell is formed on the outside of the circuit board module and the silicone tube by means of rubber coating, a pin that is shaped like the electrode wire is inserted into the plug-in channel of the main body to prevent the glue from entering the plug-in channel during the injection molding process. The plug-in channel passes through the flow channel. Since the plurality of flow channels are cross-connected with the plug-in channel, the glue can flow into the flow channel during the rubber coating process, thereby forming a water seal structure in the flow channel. Since the shell and the water seal structure are integrally formed, the shell and the plurality of water seal structures form an integrated structure at the same time. In this solution, the main body of the circuit board module is an integrated structure, which simplifies the manufacturing process of the connector; the plurality of water seal structures do not need to be installed one by one, and the assembly steps of the water seal structures are omitted, reducing the assembly difficulty of the circuit board module; the shell and the plurality of water seal structures are an integrated structure, which can ensure that the performance and sealing of the connector meet the requirements.

[0029] The extension wire provided by the present invention has a housing of a connector of the extension wire and a plurality of water seal structures as an integrated structure, which can ensure that the performance and sealing of the connector meet the requirements.

[0030] The implantable neural stimulation system provided by the present invention has low assembly difficulty of the circuit board module, simplifies the manufacturing process of the connector, and improves the sealing performance of the connector.

[0031] The assembly method provided by the present invention uses a rubber encapsulation method to form an integrated structure with a housing and a plurality of water seal structures, thereby reducing the assembly difficulty of a circuit board module, simplifying the manufacturing process of the connector, and improving the sealing performance of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0033] Figure 1 It is a schematic diagram of the assembly of the connector in an embodiment of the present invention;

[0034] Figure 2 An exploded schematic diagram of a connector according to an embodiment of the present invention;

[0035] Figure 3 An exploded schematic diagram of a circuit board module in an embodiment of the present invention;

[0036] Figure 4 is a cross-sectional view of a circuit board module in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the main body from the first viewing angle in an embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the structure of the second viewing angle of the main body in an embodiment of the present invention;

[0039] Figure 7 is a schematic structural diagram of a first terminal in an embodiment of the present invention;

[0040] Figure 8 An exploded schematic diagram of a locking member and a screw in an embodiment of the present invention;

[0041] Fig. 9 It is a structural schematic diagram of a housing in an embodiment of the present invention;

[0042] Fig.10 for Fig. 9 Sectional view along AA direction;

[0043] Fig.11 for Fig.10 A partial enlarged view of the middle A;

[0044] Fig.12 A cross-sectional view of a silicone tube and a circuit board module in an embodiment of the present invention;

[0045] Fig.13 Schematic diagram of the structure of the Pin in the embodiment of the present invention.

[0046] Reference numerals:

[0047] 1. Silicone tube; 2. Circuit board module; 3. Pin; 31. Annular groove; 4. Water seal structure; 41. Socket; 42. Annular protrusion; 5. Shell;

[0048] 11. Pipe mouth;

[0049] 21. Main body; 211. Plug-in channel; 212. Flow channel; 213. Placement groove; 214. Limiting platform; 215. Bearing boss; 216. First limiting groove; 217. Second limiting groove; 218. Installation groove; 219. Third limiting groove; 2110. Fourth limiting groove; 2111. Avoidance gap; 22. Annular spring; 23. First terminal; 231. First abutting section; 232. Middle section; 233. Second abutting section; 24. First cold-pressed tube; 25. First connecting wire; 26. Locking piece; 261. Perforation; 262. Screw hole; 263. Second terminal; 27. Screw; 271. Insulating cap; 28. Second cold-pressed tube; 29. ​​Second connecting wire. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They 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 limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0054] Implantable medical systems include implantable neural stimulation systems, implantable cardiac stimulation systems (also known as pacemakers), implantable drug delivery systems (IDDS), and lead switching systems. Examples of implantable neural stimulation systems include deep brain stimulation (DBS), implantable cortical nerve stimulation (CNS), implantable spinal cord stimulation (SCS), implantable sacral nerve stimulation (SNS), and implantable vagus nerve stimulation (VNS).

[0055] The implantable neural electrical stimulation system includes a stimulator implanted in the patient's body (i.e., an implantable neural stimulator, a neural stimulation device) and a programmable device disposed outside the patient's body. In other words, the stimulator is an implant, or the implant includes the stimulator. The relevant neural regulation technology mainly implants electrodes (electrodes, for example, in the form of electrode wires) in specific parts of the tissue of the organism (i.e., target points) through stereotactic surgery, and emits discharge pulses to the target points through the electrodes to regulate the electrical activities and functions of the corresponding neural structures and networks, thereby improving symptoms and relieving pain. Among them, the stimulator may include an IPG, an extension wire and an electrode wire. The IPG (implantable pulse generator) is disposed in the patient's body, responds to the programmable instructions sent by the programmable device, and relies on sealed batteries and circuits to provide controllable electrical stimulation energy to the tissues in the body. The IPG delivers one or more controllable specific electrical stimulations to specific areas of the tissues in the body through the extension wire and the electrode wire. The extension wire is used in conjunction with the IPG as a transmission medium for the electrical stimulation signal, and transmits the electrical stimulation signal generated by the IPG to the electrode wire. The electrode wire delivers electrical stimulation to a specific area of ​​the tissue in the body through a plurality of electrode contacts. The stimulator is provided with one or more electrode wires on one side or both sides, and a plurality of electrode contacts are provided on the electrode wire, and the electrode contacts can be arranged uniformly or non-uniformly on the circumference of the electrode wire. As an example, the electrode contacts can be arranged in an array of 4 rows and 3 columns (a total of 12 electrode contacts) on the circumference of the electrode wire. The electrode contacts can include stimulation electrode contacts and / or collection electrode contacts. The electrode contacts can be in the shape of sheets, rings, dots, etc., for example.

[0056] In some embodiments, the stimulated body tissue may be the patient's brain tissue, and the stimulated site may be a specific site of the brain tissue. When the patient's disease type is different, the stimulated site is generally different, and the number of stimulation contacts (single source or multiple sources) used, the use of one or more (single channel or multiple channels) specific electrical stimulation signals, and the stimulation parameter data are also different. The embodiments of the present application do not limit the applicable disease types, which may be deep brain stimulation (DBS), spinal cord stimulation (SCS), pelvic stimulation, gastric stimulation, peripheral nerve stimulation, and functional electrical stimulation. The disease type is applicable. Among them, the types of diseases that DBS can be used to treat or manage include, but are not limited to: spastic disorders (e.g., epilepsy), pain, migraine, psychiatric disorders (e.g., major depressive disorder (MDD)), bipolar disorder, anxiety disorders, post-traumatic stress disorder, hypotension, obsessive-compulsive disorder (OCD), behavioral disorders, mood disorders, memory disorders, mental state disorders, movement disorders (e.g., essential tremor or Parkinson's disease), Huntington's disease, Alzheimer's disease, drug addiction, autism or other neurological or psychiatric diseases and injuries.

[0057] In order to reduce the difficulty of assembling the circuit board module, simplify the manufacturing process of the connector, and improve the sealing performance of the connector, this embodiment provides a connector, an extension wire, an implantable neural stimulation system and an assembly method. Figures 1 to 13 The specific contents of this embodiment are described in detail.

[0058] like Figures 1 to 12 As shown, the connector in this embodiment includes a silicone tube 1, a circuit board module 2 and a shell 5. The silicone tube 1 is provided with a nozzle 11 for the wire of the extension wire to pass through. The circuit board module 2 includes a main body 21, and the main body 21 is provided with a plug-in channel 211 for inserting the electrode wire and a plurality of flow channels 212 for forming a water seal structure 4; the plurality of flow channels 212 are cross-connected with the plug-in channel 211. The shell 5 is made by rubber coating, and the water seal structure 4 is configured to be formed by the glue flowing into the flow channel 212, so that the shell 5 and the plurality of water seal structures 4 are an integrated structure.

[0059] In short, in the connector provided by the present invention, a plurality of flow channels 212 for forming a water seal structure 4 are arranged in the main body 21 of the circuit board module 2. Before the shell 5 is formed on the outside of the circuit board module 2 and the silicone tube 1 by encapsulation, a Pin needle 3 that is shaped like the electrode wire is inserted into the plug-in channel 211 of the main body 21 (the Pin needle 3 is similar in shape to the electrode wire, and the Pin needle 3 is inserted into the plug-in channel 211) to prevent the glue from entering the plug-in channel 211 during the injection molding process; the plug-in channel 211 passes through the flow channel 212, and since the plurality of flow channels 212 are cross-connected with the plug-in channel 211, during the encapsulation process, the glue can flow into the flow channel 212, thereby forming a water seal structure 4 in the flow channel 212, so that the shell 5 and the plurality of water seal structures 4 form an integrated structure at the same time. In this solution, the main body 21 of the circuit board module 2 is an integrated structure, which simplifies the manufacturing process of the connector; the multiple water seal structures 4 do not need to be installed one by one, the assembly steps of the water seal structures 4 are omitted, and the assembly difficulty of the circuit board module 2 is reduced; the shell 5 and the multiple water seal structures 4 are an integrated structure, which can ensure that the performance and sealing of the connector meet the requirements.

[0060] Among them, Figure 6 As shown, the height of the flow channel 212 in the thickness direction of the main body 21 is greater than the diameter of the plug-in channel 211 , so that the glue can quickly enter the main body 21 through the flow channel 212 and form a water seal structure 4 .

[0061] Further, Figures 3 to 5As shown, the conductive element is an annular spring 22, the circuit board module 2 also includes a first terminal 23, the main body 21 is provided with a placement groove 213, the annular spring 22 is accommodated in the placement groove 213, the first terminal 23 is clamped in the placement groove 213, and is in electrical contact with the annular spring 22. The inner ring of the annular spring 22 is used to insert the electrode wire (or the Pin 3), and the outer ring of the annular spring 22 is in electrical contact with the first terminal 23. When the electrode wire is inserted into the inner ring of the annular spring 22, the annular spring 22 has a suitable tightening force on the electrode wire to ensure the stable transmission of the electrical stimulation signal.

[0062] Furthermore, the first terminal 23 is an arched structure, and includes a first abutting section 231, a middle section 232, and a second abutting section 233 connected to each other. A limiting platform 214 is provided on the inner side wall of the placement groove 213, and the first abutting section 231 and the second abutting section 233 are both stopped on the limiting platform 214. The first terminal 23 and the placement groove 213 are interference-fitted, and the angle between the first abutting section 231 and the second abutting section 233 can be reduced by squeezing the two opposite ends of the first terminal 23, so that the first terminal 23 is placed in the placement groove 213; when the two opposite ends of the first terminal 23 are released, the angle between the first abutting section 231 and the second abutting section 233 increases, so that the first abutting section 231 and the second abutting section 233 are firmly pressed against the inner wall surface of the placement groove 213.

[0063] Furthermore, the placement groove 213 is provided with a bearing boss 215 on two inner wall surfaces, and the inner wall surface of the middle section 232 abuts against the outer wall surface of the bearing boss 215. The interior of the bearing boss 215 is a plug-in channel 211, and the middle section 232 of the first terminal 23 is placed on the bearing boss 215 to limit the position of the first terminal 23 in the placement groove 213.

[0064] Further, the circuit board module 2 also includes a first cold-pressed tube 24 and a first connecting wire 25. The upper surface of the main body 21 is concavely provided with a first limiting groove 216 and a second limiting groove 217. The first cold-pressed tube 24 is arranged in the first limiting groove 216, and the first connecting wire 25 is arranged in the second limiting groove 217. One end of the first connecting wire 25 is connected to the wire of the extension wire in the first cold-pressed tube 24, and the wires of the first connecting wire 25 and the extension wire are both connected to the first cold-pressed tube 24, and the other end of the first connecting wire 25 is connected to the first terminal 23. In this embodiment, six first cold-pressed tubes 24, six first connecting wires 25 and six first terminals 23 are provided. In other embodiments, the number of the first cold-pressed tubes 24, the first terminals 23 and the first connecting wires 25 can be set according to the actual use situation, and no excessive restrictions are made here.

[0065] Furthermore, the circuit board module 2 further includes a locking member 26 and a screw 27. The side wall of the main body 21 is recessed with a mounting groove 218. The locking member 26 is embedded in the mounting groove 218. The locking member 26 is provided with a communicating through hole 261 and a screw hole 262. The through hole 261 is coaxially arranged with the insertion channel 211. The screw 27 is threadedly connected with the screw hole 262 and is stopped on the electrode wire. The upper surface of the main body 21 is provided with an avoidance notch 2111. The locking member 26 is convexly provided with a second terminal 263 located in the avoidance notch 2111. Both the locking member 26 and the screw 27 are conductive metal members. After the electrode wire is inserted into the through hole 261, the screw 27 is screwed until the tail of the screw 27 contacts the electrode wire, so that the second terminal 263 on the locking member 26 is energized. Among them, an insulating cap 271 is provided at the head of the screw 27 to avoid the risk of leakage.

[0066] Exemplarily, in this embodiment, the locking member 26 is a square block, and the mounting groove 218 is a square groove, and the size of the square block matches that of the square groove.

[0067] Further, the circuit board module 2 also includes a second cold-pressed tube 28 and a second connecting wire 29, the upper surface of the main body 21 is concavely provided with a third limiting groove 219 and a fourth limiting groove 2110, the second cold-pressed tube 28 is arranged in the third limiting groove 219, the second connecting wire 29 is arranged in the fourth limiting groove 2110, one end of the second connecting wire 29 is connected to the second cold-pressed tube 28, and the other end of the second connecting wire 29 is connected to the second terminal 263. In this embodiment, two second cold-pressed tubes 28, two second connecting wires 29 and two second terminals 263 are provided. In other embodiments, the number of the second cold-pressed tubes 28, the second terminals 263 and the second connecting wires 29 can be set according to the actual use situation, and no excessive restrictions are made here.

[0068] Furthermore, if Fig. 9 , Fig.10 , Fig.11 and Fig.13 As shown, the outer wall surface of the Pin needle 3 is provided with multiple annular grooves 31 at intervals, and the annular grooves 31 are located at positions in the flow channel 212, so that an annular protrusion 42 is convexly provided in the insertion hole 41 of the formed water seal structure 4. In this embodiment, four water seal structures 4 are provided, and four annular grooves 31 are provided at intervals on the outer wall surface of the Pin needle 3. In the process of injecting the glue into the flow channel 212, an annular protrusion 42 is formed in the water seal structure 4, ensuring that the formed water seal structure 4 has a suitable tightening force on the inserted electrode wire, and ensuring good sealing performance.

[0069] This embodiment also provides an extension wire, which includes a wire and the above-mentioned connector. The housing of the connector of the extension wire and multiple water seal structures are integrated structures, which can ensure that the performance and sealing of the connector meet the requirements.

[0070] This embodiment also provides an implantable neural stimulation system, which includes a pulse generator, an electrode wire and the above-mentioned extension wire, and the pulse generator is connected to the electrode wire through the extension wire. Specifically, one end of the extension wire is connected to the pulse generator, and the wire at the other end of the extension wire passes through the tube mouth 11 of the silicone tube 1 and is connected to the connecting wire through the cold press tube. The cold press tube ensures that the connecting wire and the wire of the extension wire are in good contact, ensuring the normal transmission of the electrical stimulation signal.

[0071] In summary, the main body 21 of the circuit board module 2 is designed as an integrated structure, and a placement groove 213 for placing the annular spring 22 is opened on the integrated main body 21, and the water seal structure 4 is integrally formed with the shell 5 when the shell 5 is encapsulated. The main body 21 of the circuit board module 2 does not need to be assembled from two parts. On the one hand, it simplifies the manufacturing process of the connector, and on the other hand, it can ensure that the performance and sealing of the obtained connector meet the requirements.

[0072] This embodiment also provides an assembly method, which is used to assemble the connector mentioned above, and the assembly method includes the following steps: placing a circuit board module 2 equipped with several conductive elements in a casting jig; a pin 3 with the same shape as the electrode wire passes through the flow channel 212 and the conductive element and is inserted into the plug-in channel 211 of the circuit board module 2; injecting glue into the casting jig, the glue flows into the flow channel 212 and is left to stand for a set time to form an integrated shell 5 and water seal structure 4. This assembly method integrates the shell with multiple water seal structures; the pin 3 is pulled out from the plug-in channel 211, which simplifies the manufacturing process of the connector by reducing the assembly difficulty of the circuit board module and improves the sealing performance of the connector.

[0073] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A connector, characterized in that: include: A circuit board module (2), the circuit board module (2) comprising a main body (21), the main body (21) being provided with an insertion channel (211) for inserting an electrode wire, a plurality of conductive elements arranged in the insertion channel (211), and a water seal structure (4) arranged axially spaced from the conductive elements, and a flow channel (212) for forming the water seal structure (4) being provided through a side wall of the main body (21); The shell (5) is made by rubber encapsulation, and the shell (5) is integrally formed with the plurality of water seal structures (4) through the flow channel (212).

2. The connector according to claim 1, characterized in that: The height of the flow channel (212) in the thickness direction of the main body (21) is greater than the diameter of the insertion channel (211).

3. The connector according to claim 1, characterized in that: The conductive element is an annular spring (22), the circuit board module (2) further comprises a first terminal (23), the main body (21) is provided with a placement groove (213), the annular spring (22) is accommodated in the placement groove (213), the first terminal (23) is clamped in the placement groove (213), and is in electrical contact with the annular spring (22).

4. The connector according to claim 3, characterized in that: The first terminal (23) is an arched structure, and comprises a first abutting section (231), a middle section (232), and a second abutting section (233) which are connected to each other.

5. The connector according to claim 4, characterized in that: The inner side wall of the placement groove (213) is provided with a limiting platform (214), and the first abutting section (231) and the second abutting section (233) are both stopped on the limiting platform (214).

6. The connector according to claim 4, characterized in that: The placement groove (213) is provided with a bearing boss (215) protrudingly on two inner wall surfaces thereof, and the inner wall surface of the middle section (232) abuts against the outer wall surface of the bearing boss (215).

7. The connector according to claim 3, characterized in that: The circuit board module (2) further comprises a first cold-pressed tube (24) and a first connecting wire (25); the upper surface of the main body (21) is provided with a first limiting groove (216) and a second limiting groove (217); the first cold-pressed tube (24) is arranged in the first limiting groove (216); the first connecting wire (25) is arranged in the second limiting groove (217); one end of the first connecting wire (25) is connected to the first cold-pressed tube (24); and the other end of the first connecting wire (25) is connected to the first terminal (23).

8. The connector according to claim 2, characterized in that: The circuit board module (2) further comprises a locking member (26) and a screw (27); a mounting groove (218) is recessed on the side wall of the main body (21); the locking member (26) is embedded in the mounting groove (218); the locking member (26) is provided with a communicating through hole (261) and a screw hole (262); the through hole (261) is coaxially arranged with the plug-in channel (211); the screw (27) is threadedly connected with the screw hole (262) and is stopped on the electrode wire; an avoidance notch (2111) is provided on the upper surface of the main body (21); and the locking member (26) is convexly provided with a second terminal (263) located in the avoidance notch (2111).

9. The connector according to claim 8, characterized in that: The head of the screw (27) is provided with an insulating cap (271).

10. The connector according to claim 1, characterized in that An annular protrusion (42) is protrudingly provided in the insertion hole (41) of the water seal structure (4).

11. An extension wire, characterized in that: The extension wire comprises the connector according to any one of claims 1-10.

12. An implantable neural stimulation system, characterized in that: The invention comprises a pulse generator, an electrode wire and an extension wire according to claim 11, wherein the pulse generator is connected to the electrode wire through the extension wire.

13. An assembly method, characterized in that: For assembling the connector according to any one of claims 1 to 8, comprising the following steps: Placing a circuit board module (2) equipped with a plurality of conductive elements in a casting jig; A pin (3) having the same shape as the electrode wire passes through the flow channel (212) and the conductive element and is inserted into the plug-in channel (211) of the circuit board module (2); Injecting glue into the casting jig, the glue flowing into the flow channel (212) and standing for a set time to form an integrated shell (5) and a water seal structure (4); Pull the Pin (3) out of the plugging channel (211).

14. The assembly method according to claim 13, characterized in that: The outer wall surface of the Pin needle (3) is recessed with a plurality of annular grooves (31) at intervals, and the annular grooves (31) are located at positions within the flow channel (212).

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