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, a plug-in channel and a pouring cavity are arranged in the circuit board module, an electrode wire is inserted into the plug-in channel, the pouring cavity is used for forming a first water seal, a plurality of conductive elements are axially arranged in the plug-in channel at intervals, an opening is formed in one end of the circuit board module, and the opening is communicated with the pouring cavity; and the shell is manufactured in a rubber coating mode, and the shell and the first water seal are integrally formed through the pouring cavity. The first water seal and the shell are of an integrated structure in a rubber coating mode, the assembling speed of the circuit board module is increased, and the waterproof sealing performance of the circuit board module 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] Neuroelectric stimulation is a commonly used method for treating neurological disorders and rehabilitation of neurological injuries. Neuroelectric stimulation systems apply 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] Among them, the electrical conduction between the pulse generator and the electrode is achieved through an extended wire. One end of the extended wire is inserted into the channel module of the pulse generator, and the other end is connected to the electrode wire. The extended wire includes a wire and a connector. The front end of the connector is a silicone tube. The wire of the extended wire passes through the silicone tube and extends out of the tube mouth; the rear end of the connector is a circuit board module. The circuit board module is formed with an electrode plug-in channel. A plurality of terminals are arranged along the extension direction of the plug-in channel. The terminals are connected to the electrodes inserted into the plug-in channel through springs or screws, wherein the outermost terminals are connected to the electrodes through screws. In the related art, the connector adopts a rubber-coated method to form a shell, and the shell wraps the silicone tube and the circuit board module as a whole.

[0004] In order to prevent body fluids from entering the circuit board module when the connector is implanted in the human body and affecting the connection between the spring or screw and the electrode, a plurality of water seal structures are arranged in the battery panel module in the related technology. The plurality of water seal structures are arranged along the extension direction of the plug-in channel. The electrode can pass through the plurality of water seal structures. A water seal structure is arranged between two adjacent springs, and a water seal structure is also arranged on the outside of the screw. The water seal structure arranged on the outside of the screw is the first water seal.

[0005] However, all water seal structures in the connector are separate parts. When manufacturing the connector, the water seal structures need to be assembled into the circuit board module one by one, and then a shell is formed on the outside of the circuit board module by means of rubber encapsulation. The whole process is not only cumbersome, but also time-consuming and labor-intensive, and the sealing effect is poor.

[0006] 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

[0007] The object of the present invention is to provide a connector, an extension wire, an implantable neural stimulation system and an assembly method, which not only speeds up the assembly speed of a circuit board module, but also improves the waterproof sealing of the circuit board module.

[0008] In order to achieve the above objectives, the following technical solutions are provided:

[0009] A connector, comprising:

[0010] A circuit board module is provided with a plug-in channel for inserting an electrode wire and a casting cavity for forming a first water seal, a plurality of conductive elements are axially spaced in the plug-in channel, and an opening is provided at one end of the circuit board module, and the opening is communicated with the casting cavity;

[0011] The shell is made by rubber encapsulation, and the shell is integrally formed with the first water seal through the casting cavity.

[0012] As an optional solution of the connector, the diameter of the opening is larger than the diameter of the plug passage.

[0013] As an optional solution of the connector, a connecting portion is provided between the first water seal and the shell, the connecting portion passes through the opening, and the first water seal, the connecting portion and the shell are an integrated structure.

[0014] As an optional solution of the connector, the first water seal is provided with two through holes, and the inner wall surface of each through hole is provided with a convex ring.

[0015] As an optional solution for the connector, the circuit board module includes a first plate member and a second plate member that are buckled with each other;

[0016] The end surface of the first plate member facing the second plate member is provided with a first slot along the direction of the plug-in passage and a first casting groove along the direction of the casting cavity;

[0017] The end surface of the second plate facing the first plate is recessed with a second slot along the direction of the plug-in channel and a second casting groove along the direction of the casting cavity. The first slot and the second slot are arranged to form the plug-in channel, and the first casting groove and the second casting groove are arranged to form the casting cavity.

[0018] As an optional solution of the connector, the end surface of the first plate facing the second plate is provided with a first limiting groove or a first limiting protrusion, and the end surface of the second plate facing the first plate is provided with a corresponding first limiting protrusion or the first limiting groove, and the first limiting groove is plugged into the first limiting protrusion.

[0019] As an optional solution of the connector, a second limiting groove or a second limiting protrusion is provided on the end surface of the first plate facing the second plate, and a corresponding second limiting protrusion or second limiting groove is provided on the end surface of the second plate facing the first plate, and the second limiting groove is plugged into the second limiting protrusion.

[0020] As an optional solution for the connector, it also includes a second water seal, which has a first through hole extending therethrough, a first mounting groove being recessed on the end surface of the first plate facing the second plate, and a second mounting groove being recessed on the end surface of the second plate facing the first plate, and the second water seal is arranged in a space enclosed by the first mounting groove and the second mounting groove.

[0021] As an optional solution for the connector, the conductive element is an annular spring, a first arc-shaped groove is recessed on the end surface of the first plate facing the second plate, a second arc-shaped groove is recessed on the end surface of the second plate facing the first plate, and the annular spring is arranged in a space enclosed by the first arc-shaped groove and the second arc-shaped groove.

[0022] As an optional solution of the connector, it also includes a first terminal, which is arranged on the end surface of the first plate facing away from the second plate, and a threading hole is opened at the bottom of the first arc groove, and the pin of the annular spring passes through the threading hole to be connected to the first terminal.

[0023] As an optional solution for the connector, a locking piece is installed on the side of the circuit board module, and the locking piece is provided with a second through hole and a screw hole that are connected. The electrode wire is passed through the second through hole, and the screw is threadedly connected to the screw hole and stopped on the electrode wire. The first plate member is provided with an avoidance hole along its thickness direction, and the locking piece is protruding with a second terminal located in the avoidance hole.

[0024] An extension wire comprises the connector as described above.

[0025] An implantable neural stimulation system comprises a pulse generator, an electrode wire and the extension wire as described above, wherein the electrode wire is inserted into a plug-in channel, one end of the extension wire is connected to the pulse generator, and the other end of the extension wire is electrically connected to the electrode wire.

[0026] An assembly method for assembling the connector assembly as described above comprises the following steps:

[0027] Placing a circuit board module with a plurality of conductive components installed thereon in a casting jig;

[0028] A pin having the same shape as the electrode wire passes through the opening, through the casting cavity and the conductive element, and is inserted into the plug-in channel; and a flow channel communicating with the casting cavity is formed between the inner wall surface of the opening and the outer wall surface of the pin pin;

[0029] Injecting glue into the casting jig, the glue enters the casting cavity through the flow channel and is left to stand for a set time to form an integrated structure shell and a first water seal;

[0030] Pull out the Pin from the plugging channel.

[0031] 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.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The connector provided by the present invention is provided with a casting cavity for forming a first water seal and an opening connected to the casting cavity in the circuit board module. Before the shell is formed on the outside of the circuit board module and the silicone tube by encapsulation, a pin that is shaped like the electrode is inserted into the plug-in channel of the circuit board module to prevent the glue from entering the plug-in channel during the injection molding process; the glue enters the casting cavity through the opening, thereby forming a water seal structure of the first water seal by injection molding in the casting cavity. The water seal structure of the first water seal is formed simultaneously in the process of forming the shell by encapsulation, that is, the water seal structure of the first water seal is integrally formed with the shell, which not only omits the step of assembling the water seal structure of the first water seal, but also simplifies the manufacturing process of the connector. In addition, during use, due to the integrated structure of the first water seal and the shell, there is no gap between the transition part of the first water seal and the shell at the opening position, and body fluids cannot flow into the circuit board module, thereby improving the sealing of the first water seal integrally formed with the shell.

[0034] The extended wire provided by the present invention reduces the difficulty of assembly and improves the waterproof sealing performance of the connector.

[0035] The neural electrical stimulation system provided by the present invention not only has a fast assembly speed, but also has a high waterproof sealing performance of the circuit board module.

[0036] The assembly method provided by the present invention adopts a rubber encapsulation method to form an integrated structure between the first water seal and the shell, thereby reducing the difficulty of assembly and improving the waterproof sealing performance of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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.

[0038] Figure 1 This is a schematic diagram of assembling a pin into a connector according to an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of the structure of a connector in an embodiment of the present invention;

[0040] Figure 3 An exploded schematic diagram of a connector according to an embodiment of the present invention;

[0041] Figure 4 A cross-sectional view of a silicone tube and a circuit board module in an embodiment of the present invention;

[0042] Figure 5 is a cross-sectional view of a housing and a first water seal in an embodiment of the present invention;

[0043] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0044] Figure 7 An exploded schematic diagram of a circuit board module in an embodiment of the present invention;

[0045] Figure 8 is a schematic structural diagram of a second plate member in an embodiment of the present invention;

[0046] Fig. 9 is a schematic structural diagram of a first plate member in an embodiment of the present invention;

[0047] Fig.10 This is a schematic diagram of the structure of the second water seal in an embodiment of the present invention;

[0048] Fig.11 An exploded schematic diagram of a locking member and a screw in an embodiment of the present invention;

[0049] Fig.12 Schematic diagram of the structure of the Pin in the embodiment of the present invention.

[0050] Reference numerals:

[0051] 1. Silicone tube; 101. Tube mouth; 2. Circuit board module; 3. Pin needle; 31. Annular groove; 4. Shell; 5. First water seal; 51. Through hole; 52. Protruding ring; 6. Second water seal; 61. First perforation; 62. Annular protrusion; 7. Annular spring; 8. First terminal; 9. Flow channel; 10. Cold press tube; 11. Connecting wire; 12. Connecting part;

[0052] 21. plug-in channel; 22. casting cavity; 23. opening; 24. first plate; 25. second plate; 26. locking member; 261. second through hole; 262. screw hole; 263. second terminal; 27. screw; 271. insulating cap;

[0053] 241, first slot; 242, first casting slot; 243, first limiting slot; 244, second limiting slot; 245, first mounting slot; 246, first arc slot; 2461, threading hole; 247, avoidance hole;

[0054] 251, second slot; 252, second casting slot; 253, first limiting protrusion; 254, second limiting protrusion; 255, second mounting slot; 256, second arc slot. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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).

[0060] 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.

[0061] 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.

[0062] In order to speed up the assembly of the circuit board module and improve the waterproof sealing of the circuit board module, this embodiment provides a connector, an extension wire, an implantable neural stimulation system and an assembly method. Figures 1 to 12 The specific contents of this embodiment are described in detail.

[0063] In this embodiment, the connector includes a silicone tube 1, a circuit board module 2 and a shell 4. The circuit board module 2 is provided with a plug-in channel 21 for inserting the electrode and a casting cavity 22 for forming a first water seal 5. The circuit board module 2 is provided with an opening 23 at one end away from the silicone tube 1, and the opening 23 is connected to the casting cavity 22. The pin needle 3 has the same shape as the electrode, and the inner diameter of the opening 23 is larger than the outer diameter of the pin needle 3. Before the rubber coating is prepared, the pin needle 3 passes through the casting cavity 22 through the opening 23 and is inserted into the plug-in channel 21, and a flow channel 9 connected to the casting cavity 22 is formed between the inner wall surface of the opening 23 and the outer wall surface of the pin needle 3. The shell 4 is made by rubber coating, and the shell 4 is integrated with the first water seal 5 through the casting cavity 22.

[0064] In short, the connector provided in this embodiment is provided with a casting cavity 22 for forming a first water seal 5 and an opening 23 connected to the casting cavity 22 on the circuit board module 2. Before the shell 4 is formed on the outside of the circuit board module 2 and the silicone tube 1 by encapsulation, a pin 3 that is shaped like the electrode is inserted into the plug-in channel 21 of the circuit board module 2 to prevent the glue from entering the plug-in channel 21 during the injection molding process; the glue flows into the casting cavity through the opening, thereby forming a water seal structure of the first water seal 5 by injection molding in the casting cavity 22. The water seal structure of the first water seal 5 is formed simultaneously in the process of forming the shell 4 by encapsulation, that is, the water seal structure of the first water seal 5 is integrally formed with the shell 4, which not only omits the step of assembling the water seal structure of the first water seal 5, but also simplifies the manufacturing process of the connector. In addition, during use, due to the integrated structure of the first water seal 5 and the shell 4, there is no gap in the transition part between the first water seal 5 and the shell 4 at the opening 23 position, and body fluids cannot flow into the circuit board module 2, thereby improving the sealing performance of the first water seal 5 integrally formed with the shell 4.

[0065] Exemplarily, the diameter of the opening 23 is larger than the diameter of the insertion channel 21 , which not only facilitates the Pin needle 3 (or electrode wire) to pass through the opening 23 ; but also forms a flow channel 9 between the opening 23 and the Pin needle 3 when the glue is added.

[0066] A connection portion 12 is provided between the first water seal 5 and the shell 4, and an opening 23 is formed through the connection portion 12. The first water seal 5, the connection portion 12 and the shell 4 are an integrated structure. By adding the connection portion 12, the connection stability between the first water seal 5 and the shell 4 is improved.

[0067] Specifically, in this embodiment, two through holes 51 are provided on the first water seal 5, and a convex ring 52 is provided on the inner wall of each through hole 51. The pin needle 3 (or electrode wire) can pass through the through hole 51, and by adding the convex ring 52, the convex ring 52 can be closely abutted against the outer wall of the pin needle 3 (or electrode wire), thereby improving the connection sealing performance.

[0068] Furthermore, the circuit board module 2 includes a first plate 24 and a second plate 25 that are interlocked, and the end surface of the first plate 24 facing the second plate 25 is recessed with a first slot 241 along the direction of the plug-in channel 21 and a first pouring groove 242 along the direction of the pouring cavity 22; the end surface of the second plate 25 facing the first plate 24 is recessed with a second slot 251 along the direction of the plug-in channel 21 and a second pouring groove 252 along the direction of the pouring cavity 22, the first slot 241 and the second slot 251 are arranged to form the plug-in channel 21, and the first pouring groove 242 and the second pouring groove 252 are arranged to form the pouring cavity 22. The first plate 24 and the second plate 25 are interlocked to form the main structure of the circuit board module 2, so that other components can be easily installed between the first plate 24 and the second plate 25.

[0069] Further, the end surface of the first plate 24 facing the second plate 25 is provided with a first limiting groove 243 or a first limiting protrusion 253, and the end surface of the second plate 25 facing the first plate 24 is provided with a corresponding first limiting protrusion 253 or a first limiting groove 243, and the first limiting groove 243 is plugged with the first limiting protrusion 253. In this embodiment, the first limiting groove 243 is extended on the outer edge of the first plate 24, and the first limiting protrusion 253 is extended on the outer edge of the second plate 25. After the first limiting protrusion 253 is inserted into the first limiting groove 243, not only the connection firmness of the first plate 24 and the second plate 25 is improved, but also the end surfaces of the first plate 24 and the second plate 25 are closely attached, ensuring that the plug-in channel 21 formed by the first slot 241 and the second slot 251 has a suitable clamping force on the pin 3, and avoiding the leakage of glue during the rubber coating.

[0070] Further, the end surface of the first plate 24 facing the second plate 25 is provided with a second limiting groove 244 or a second limiting protrusion 254, and the end surface of the second plate 25 facing the first plate 24 is provided with a corresponding second limiting protrusion 254 or a second limiting groove 244, and the second limiting groove 244 is plugged with the second limiting protrusion 254. In this embodiment, the second limiting groove 244 is provided at one end of the first plate 24 close to the opening 23, and the second limiting protrusion 254 is provided at one end of the second plate 25 close to the opening 23. After the second limiting protrusion 254 is inserted into the second limiting groove 244, not only the connection firmness of the first plate 24 and the second plate 25 is improved, but also the end surfaces of the first plate 24 and the second plate 25 are closely attached at the position close to the opening 23, so as to avoid the gap between the casting cavity 22 formed by the first casting groove 242 and the second casting groove 252, which causes the leakage of glue during the encapsulation.

[0071] Furthermore, the connector further includes a second water seal 6, which is provided with a first through hole 61, a first mounting groove 245 is recessed on the end surface of the first plate 24 facing the second plate 25, a second mounting groove 255 is recessed on the end surface of the second plate 25 facing the first plate 24, and the second water seal 6 is arranged in a space surrounded by the first mounting groove 245 and the second mounting groove 255. By adding a water seal structure of the second water seal 6 in the circuit board module 2, the waterproof sealing of the circuit board module 2 is improved, the internal parts of the circuit board module 2 are protected from normal use, and the risk of electric shock is avoided.

[0072] Furthermore, a plurality of first mounting grooves 245 are arranged at intervals on the first plate 24 along the direction of the plug-in channel 21, and a plurality of second mounting grooves 255 are arranged at intervals on the second plate 25 along the direction of the plug-in channel 21, and the plurality of first mounting grooves 245 and the plurality of second mounting grooves 255 are arranged one-to-one in correspondence. In this embodiment, three second water seals 6 are provided. In other embodiments, the number of second water seals 6 added in the circuit board module 2 is determined according to actual conditions, and no excessive restrictions are made here.

[0073] Furthermore, the conductive element is an annular spring 7, a first arc groove 246 is concavely provided on the end surface of the first plate 24 facing the second plate 25, a second arc groove 256 is concavely provided on the end surface of the second plate 25 facing the first plate 24, and the annular spring 7 is arranged in a space surrounded by the first arc groove 246 and the second arc groove 256. When the electrode is inserted into the annular spring 7, the inner diameter of the annular spring 7 is enlarged, ensuring that the annular spring 7 has a suitable wrapping force on the electrode and ensuring good contact between the electrode and the annular spring 7.

[0074] Furthermore, the connector also includes a first terminal 8. The first terminal 8 is arranged on the end surface of the first plate 24 facing away from the second plate 25. A threading hole 2461 is provided at the bottom of the first arc-shaped groove 246. The pin of the annular spring 7 passes through the threading hole 2461 and is connected to the first terminal 8. In the present embodiment, the pin of the annular spring 7 is welded to the first terminal 8 to ensure good contact between the two so that the electrical stimulation signal can be transmitted normally.

[0075] Furthermore, a locking member 26 is installed on the side of the circuit board module 2. The locking member 26 is provided with a second through hole 261 and a screw hole 262 that are connected. The electrode wire is inserted into the second through hole 261. The screw 27 is threadedly connected with the screw hole 262 and is stopped on the electrode wire. The first plate 24 is provided with an escape hole 247 along its thickness direction. The locking member 26 is provided with a second terminal 263 that is located in the escape hole 247. The locking member 26 and the screw 27 are both conductive metal parts. After the electrode is inserted into the second through hole 261, the screw 27 is screwed until the tail of the screw 27 contacts the electrode, 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.

[0076] This embodiment further provides an extension wire, which includes a connector and a wire. The connector of the extension wire in this embodiment reduces the difficulty of assembly and improves the waterproof sealing performance of the connector.

[0077] This embodiment also provides an implantable neural stimulation system, which includes a pulse generator, an electrode wire and the above-mentioned extension wire, the electrode wire is inserted into the plug-in channel 21, one end of the extension wire is connected to the pulse generator, and the extension wire is electrically connected to the electrode wire. Specifically, the wire of the extension wire passes through the tube mouth 101 of the silicone tube 1 and is connected to the connecting wire 11 through the cold press tube 10. The cold press tube 10 ensures that the connecting wire 11 is in good contact with the wire of the extension wire, ensuring the normal transmission of the electrical stimulation signal.

[0078] This embodiment also provides an assembly method for assembling the above-mentioned connector, which includes 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 casting cavity 22 and the conductive element through the opening 23 and is inserted into the plug-in channel 21; and a flow channel 9 connected to the casting cavity 22 is formed between the inner wall surface of the opening 23 and the outer wall surface of the pin 3; injecting glue into the casting jig, the glue enters the casting cavity 22 through the flow channel 9 and is left to stand for a set time to form a housing 4 and a first water seal 5 of an integrated structure; and pulling the pin 3 out of the plug-in channel 21. In this application, the size of the opening 23 is designed to be larger than the size of the pin 3, so that a flow channel 9 connected to the casting cavity 22 is formed between the opening 23 and the pin 3. In the process of forming the housing 4 by encapsulating the outside of the circuit board module 2 with glue, the glue can directly enter the casting cavity 22 through the flow channel 9. The first water seal 5 and the housing 4 are formed into an integrated structure by using a rubber coating method, thereby reducing the difficulty of assembly and improving the waterproof sealing performance of the connector.

[0079] The outer wall surface of the Pin needle 3 is provided with a plurality of annular grooves 31 at intervals, and the annular grooves 31 are located in the flow channel 212, so that not only a convex ring 52 is formed in the through hole 51 of the first water seal 5, but also an annular protrusion 62 is formed in the first through hole 61 of the second water seal 6. In this embodiment, a total of four water seal structures are provided, and the outer wall surface of the Pin needle 3 is provided with four annular grooves 31 at intervals.

[0080] 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) is provided with a plug-in channel (21) for inserting an electrode wire and a casting cavity (22) for forming a first water seal (5), a plurality of conductive elements are axially spaced apart in the plug-in channel (21), an opening (23) is provided at one end of the circuit board module (2), and the opening (23) is in communication with the casting cavity (22); The shell (4) is made by rubber encapsulation, and the shell (4) is integrally formed with the first water seal (5) through the casting cavity (22).

2. The connector according to claim 1, characterized in that: The diameter of the opening (23) is greater than the diameter of the insertion channel (21).

3. The connector according to claim 1, characterized in that: A connecting portion (12) is provided between the first water seal (5) and the shell (4), the connecting portion (12) penetrates the opening (23), and the first water seal (5), the connecting portion (12) and the shell (4) form an integrated structure.

4. The connector according to claim 1, characterized in that: The first water seal (5) is provided with two through holes (51), and the inner wall surface of each through hole (51) is provided with a convex ring (52).

5. The connector according to claim 1, characterized in that: The circuit board module (2) comprises a first plate component (24) and a second plate component (25) which are interlocked; The end surface of the first plate (24) facing the second plate (25) is provided with a first slot (241) along the direction of the insertion channel (21) and a first casting groove (242) along the direction of the casting cavity (22); The end surface of the second plate member (25) facing the first plate member (24) is provided with a second slot (251) along the direction of the plug-in channel (21) and a second casting groove (252) along the direction of the casting cavity (22); the first slot (241) and the second slot (251) are arranged to form the plug-in channel (21); and the first casting groove (242) and the second casting groove (252) are arranged to form the casting cavity (22).

6. The connector according to claim 5, characterized in that: The end surface of the first plate member (24) facing the second plate member (25) is provided with a first limiting groove (243) or a first limiting protrusion (253), and the end surface of the second plate member (25) facing the first plate member (24) is provided with a corresponding first limiting protrusion (253) or the first limiting groove (243), and the first limiting groove (243) is plugged into the first limiting protrusion (253).

7. The connector according to claim 5, characterized in that: The end surface of the first plate member (24) facing the second plate member (25) is provided with a second limiting groove (244) or a second limiting protrusion (254), and the end surface of the second plate member (25) facing the first plate member (24) is provided with a corresponding second limiting protrusion (254) or the second limiting groove (244), and the second limiting groove (244) is plugged into the second limiting protrusion (254).

8. The connector according to claim 5, characterized in that: The invention also comprises a second water seal (6), wherein the second water seal (6) is provided with a first through hole (61), the end surface of the first plate (24) facing the second plate (25) is provided with a first mounting groove (245), and the end surface of the second plate (25) facing the first plate (24) is provided with a second mounting groove (255), and the second water seal (6) is arranged in a space enclosed by the first mounting groove (245) and the second mounting groove (255).

9. The connector according to claim 5, characterized in that: The conductive element is an annular spring (7); a first arcuate groove (246) is recessed on the end surface of the first plate (24) facing the second plate (25); a second arcuate groove (256) is recessed on the end surface of the second plate (25) facing the first plate (24); and the annular spring (7) is arranged in a space enclosed by the first arcuate groove (246) and the second arcuate groove (256).

10. The connector according to claim 9, characterized in that: It also includes a first terminal (8), the first terminal (8) is arranged on the end surface of the first plate (24) facing away from the second plate (25), and a threading hole (2461) is opened at the bottom of the first arc-shaped groove (246), and the pin of the annular spring (7) passes through the threading hole (2461) to be connected to the first terminal (8).

11. The connector according to claim 5, characterized in that: A locking piece (26) is installed on the side of the circuit board module (2), and the locking piece (26) is provided with a second through hole (261) and a screw hole (262) that are connected to each other. The electrode wire is passed through the second through hole (261), and the screw (27) is threadedly connected to the screw hole (262) and stopped on the electrode wire. The first plate (24) is provided with an avoidance hole (247) through it along its thickness direction, and the locking piece (26) is provided with a second terminal (263) protruding from the avoidance hole (247).

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

13. An implantable neural stimulation system, characterized in that: It comprises a pulse generator, an electrode wire and an extension wire as claimed in claim 12, wherein the electrode wire is inserted into an insertion channel (21), one end of the extension wire is connected to the pulse generator, and the other end of the extension wire is electrically connected to the electrode wire.

14. An assembly method, characterized in that: For assembling the connector according to any one of claims 1 to 11, comprising the following steps: Placing a circuit board module (2) equipped with a plurality of conductive elements in a casting jig; A pin needle (3) having the same shape as the electrode wire passes through the casting cavity (22) and the conductive element through the opening (23) and is inserted into the plug-in channel (21); and a flow channel (9) communicating with the casting cavity (22) is formed between the inner wall surface of the opening (23) and the outer wall surface of the pin needle (3); Injecting glue into the casting jig, the glue enters the casting cavity (22) through the flow channel (9) and is left to stand for a set time to form a shell (4) and a first water seal (5) of an integrated structure; Pull the Pin (3) out of the plugging channel (21).

15. The assembly method according to claim 14, 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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