Electrical stimulation system

Abstract

The utility model discloses an electrical stimulation system, and belongs to the technical field of medical instruments. The electrical stimulation system comprises a pulse generator and a wire. The pulse generator comprises a body and a locking assembly. The locking assembly comprises a locking block and a locking piece, the locking block is arranged on the body, the locking block is provided with a through hole and a lock hole which are communicated with each other, and the wire penetrates through the through hole; the locking member is fixedly held in the lock hole, and the first side surface of the locking member abuts against the second side surface of the wire. According to the electrical stimulation system, displacement of the pulse generator and the wire is prevented, the problem of stimulation failure is avoided, and it is guaranteed that repeated assembly and disassembly are convenient.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an electrical stimulation system. Background Technology

[0002] An electrical stimulation system includes a pulse generator and leads connected to the pulse generator, such as extension leads and electrode leads. The pulse generator is implanted in the chest or skull, and the brain is stimulated via the extension leads and electrode leads. A reliable connection must be maintained between the pulse generator and the leads to ensure the required function.

[0003] In related technologies, the lead wire is fixedly connected to the pulse generator by pressing the end of a screw. However, in the patient's daily life, such as walking or running, the pulse generator, lead wire, and screw are subjected to random vibration or impact forces, which can cause the screw to come loose and fail under such stress conditions. This, in turn, causes relative displacement between the pulse generator and the lead wire, resulting in stimulation failure.

[0004] Therefore, there is an urgent need for an electrical stimulation system to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an electrical stimulation system that prevents displacement of the pulse generator and the wires, thereby avoiding stimulation failure.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An electrical stimulation system includes a pulse generator and a lead wire, the pulse generator including a body and a locking assembly; the locking assembly includes:

[0008] A locking block is provided on the body, the locking block has a through hole and a lock hole that are interconnected, and the wire passes through the through hole;

[0009] A locking member is fixed in the lock hole, and the first side of the locking member abuts against the second side of the wire.

[0010] In some possible implementations, the lock hole includes a threaded hole and a countersunk groove, the countersunk groove being in communication with the through hole; the locking member includes a threaded rod and a boss, the threaded rod being threadedly engaged with the threaded hole to connect the locking member and the locking block, the boss being disposed in the countersunk groove, such that the side of the boss forms at least a portion of the first side surface to press against the second side surface.

[0011] In some possible implementations, the diameter of the boss is larger than the diameter of the threaded rod, so that the connection structure between the boss and the threaded rod has an inclined surface, the first side being formed by the side of the boss, or the first side being formed by the side of the boss and at least a portion of the inclined surface together.

[0012] In some possible implementations, the locking assembly further includes a seal, wherein the outer periphery of the boss is provided with an annular groove, and the seal is disposed in the annular groove to provide a sealing connection between the boss and the groove.

[0013] In some possible implementations, the outer diameter of the seal is larger than the outer diameter of the boss and the inner diameter of the recess, respectively, so that the seal is interference-fitted with the sidewall of the recess.

[0014] In some possible implementations, the locking member is provided with a mating portion for mating with an external structure so that the locking member is threadedly connected to the lock hole.

[0015] In some possible implementations, the angle between the centerline of the through hole and the centerline of the lock hole is 90°.

[0016] In some possible implementations, the outer periphery of the conductor is provided with a locking ring, and the locking member presses against the locking ring.

[0017] In some possible implementations, the pulse generator further includes a first sealing block, the body having a first mounting groove, the first sealing block being disposed in the first mounting groove and abutting against the locking block on one side along the mounting direction of the locking member and the locking block.

[0018] In some possible implementations, the pulse generator further includes a second sealing block, the body having a second mounting groove, the second sealing block being disposed in the second mounting groove and abutting against one side of the locking block along the extension direction of the wire, the second sealing block having a through hole through which the wire passes.

[0019] In some possible implementations, the pulse generator further includes a channel module disposed within the body. The channel module has a wire-passing groove that communicates with the through hole. The wire passes through the wire-passing groove and the through hole, and the end face of the wire is in contact with the bottom of the wire-passing groove.

[0020] In some possible implementations, the body is provided with a limiting groove, and the locking block is limited within the limiting groove.

[0021] In some possible implementations, the locking block is provided with at least one through hole and at least one lock hole, with the through hole and the lock hole being provided in a one-to-one correspondence; the locking member and the wire are provided with at least one, with the wire passing through the through hole and the locking member being fixed in the lock hole.

[0022] The beneficial effects of this utility model are:

[0023] This invention provides an electrostimulation system in which a lead wire passes through a through hole, and a locking member is threadedly connected to the locking hole, pressing the circumferential surface of the locking member firmly against the circumferential surface of the lead wire. On the one hand, this ensures the accuracy of the lead wire's position during initial assembly; on the other hand, it prevents the locking member from loosening, reducing the risk of loosening and thus ensuring the stability of the pulse generator and lead wire locking mechanism under random vibration and impact conditions, increasing implantation safety. The locking assembly prevents displacement of the pulse generator and lead wire, avoiding stimulation failure and ensuring the effectiveness of electrode stimulation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the electrical stimulation system provided in a specific embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the locking component, the second sealing block, and the channel module provided in a specific embodiment of this utility model;

[0026] Figure 3 yes Figure 2 Sectional view at point AA;

[0027] Figure 4 This is a side view of the electrical stimulation system provided in a specific embodiment of this utility model;

[0028] Figure 5 yes Figure 4 Sectional view at BB;

[0029] Figure 6 This is a schematic diagram of a locking block provided in a specific embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the locking component provided in a specific embodiment of this utility model;

[0031] Figure 8 This is a schematic diagram of the wire provided in a specific embodiment of this utility model;

[0032] Figure 9 This is a schematic diagram of the channel module provided in a specific embodiment of this utility model;

[0033] Figure 10 yes Figure 9Sectional view at CC.

[0034] In the picture:

[0035] 100. Pulse generator; 200. Wire; 201. Locking ring; 202. Second side; 203. End face;

[0036] 1. Main body; 11. First mounting slot; 12. Second mounting slot; 13. Limiting slot;

[0037] 2. Locking assembly; 21. Locking block; 211. Through hole; 212. Lock hole; 2121. Threaded hole; 2122. Countersunk groove; 213. Slot; 22. Locking element; 221. Threaded rod; 222. Boss; 223. Annular groove; 224. Mating part; 225. First side surface; 226. Inclined surface; 23. Seal;

[0038] 3. First sealing block; 4. Second sealing block; 41. Protrusion; 5. Channel module; 51. Threading groove; 52. Groove bottom. Detailed Implementation

[0039] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The technical field and related terms of the embodiments of this application are briefly described below.

[0043] Implantable medical systems include implantable neurostimulation systems, implantable cardiac stimulation systems (also known as pacemakers), implantable drug delivery systems (IDDS), and lead transfer systems. Examples of implantable neurostimulation systems include deep brain stimulation (DBS), cortical nerve stimulation (CNS), spinal cord stimulation (SCS), sacral nerve stimulation (SNS), and vagus nerve stimulation (VNS).

[0044] Implantable neurostimulation systems consist of a stimulator implanted in the patient's body (i.e., an implantable neurostimulator) and a programmed device placed outside the patient's body. In other words, the stimulator is a medical device, or medical devices include stimulators. Related neuromodulation techniques primarily involve stereotactic surgery to implant electrodes (e.g., electrode wires) at specific sites (target points) in the body's tissues. Discharge pulses are then delivered through these electrodes to the target points, modulating the electrical activity and function of corresponding neural structures and networks, thereby improving symptoms and alleviating pain.

[0045] As an example, a DBS includes an IPG (Implantable Pulse Generator), extension leads, and electrode leads. The IPG is connected to the electrode leads via the extension leads. The IPG is implanted in the patient's body, for example, in the chest or other internal locations.

[0046] As another example, DBS includes an IPG and electrode leads, with the IPG directly connected to the electrode leads. The IPG is implanted in the patient's head, for example, by creating a groove in the patient's skull and then placing the IPG in the groove. In this case, the IPG may not protrude from the outer surface of the skull, or it may protrude partially from the outer surface of the skull.

[0047] In this system, the IPG responds to programmed commands sent by a programmable device, relying on sealed batteries and circuits to provide controllable electrical stimulation therapy (or electrical stimulation energy) to tissues within the body. The IPG delivers one or more controllable specific electrical stimuli to specific areas of tissues within the body via electrode leads.

[0048] In some embodiments, the extension wire is used in conjunction with the IPG as a medium for transmitting electrical stimulation, thereby transmitting the electrical stimulation generated by the IPG to the electrode wire.

[0049] In some embodiments, electrical stimulation can be delivered in the form of a pulsed signal or a non-pulsed signal. For example, electrical stimulation can be delivered as a signal with various waveform shapes, frequencies, and amplitudes. Therefore, non-pulsed signal electrical stimulation can be a continuous signal, which can have a sinusoidal waveform or other continuous waveforms.

[0050] After receiving electrical stimulation from the IPG or extension leads, the electrode leads deliver the stimulation to specific areas of tissue within the body via multiple electrode contacts. The stimulator may have one or more electrode leads on one or both sides, with multiple electrode contacts on each lead. These contacts may be evenly or non-uniformly arranged circumferentially on the electrode leads. As an example, the electrode contacts may be arranged in a 4x3 array (a total of 12 contacts) circumferentially on the electrode leads. The electrode contacts may include stimulating electrode contacts and / or collecting electrode contacts. The electrode contacts may be in shapes such as sheet-like, ring-like, or dot-like.

[0051] In some embodiments, the stimulated tissue may be the patient's brain tissue, and the stimulated site may be a specific location within the brain tissue. Generally, the stimulated site differs depending on the patient's disease type, and the number of stimulation contacts (single-source or multi-source), the application of one or more specific electrical stimulation pathways (single-channel or multi-channel), and the stimulation parameters (values) also vary.

[0052] This application does not limit the applicable disease types, but can be any disease type applicable to deep brain stimulation (DBS), spinal cord stimulation (SCS), sacral nerve stimulation, gastric stimulation, peripheral nerve stimulation, or functional electrical stimulation. Among these, DBS can be used to treat or manage diseases including, but not limited to: spastic disorders (e.g., epilepsy), pain, migraines, mental illnesses (e.g., major depressive disorder (MDD)), bipolar disorder, anxiety disorders, post-traumatic stress disorder, mild depression, obsessive-compulsive disorder (OCD), behavioral disorders, mood disorders, memory disorders, mental state disorders, mobility 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 impairments.

[0053] In this embodiment of the application, when the programmable device and the stimulator establish a programmable connection, the programmable device can be used to adjust one or more stimulation parameters of the stimulator (or one or more stimulation parameters of the pulse generator, with different stimulation parameters corresponding to different electrical stimuli). Alternatively, the stimulator can sense the patient's electrophysiological activity to collect electrophysiological signals, and the collected electrophysiological signals can be used to continue adjusting the stimulation parameters of the stimulator to achieve closed-loop control (or adaptive adjustment) of the stimulation parameters.

[0054] Stimulation parameters may include at least one of the following: electrode contact identification for delivering electrical stimulation (e.g., electrode contact #2 and electrode contact #3), frequency (e.g., the number of electrical stimulation pulse signals per second, in Hz), pulse width (duration of each pulse, in μs), amplitude (generally expressed as voltage, i.e., the intensity of each pulse, in V), timing (e.g., continuous or bursty, bursty refers to discontinuous timing behavior composed of multiple processes), stimulation mode (including one or more of current mode, voltage mode, timed stimulation mode, and cyclic stimulation mode), physician control upper and lower limits (the range that the physician can adjust), and patient control upper and lower limits (the range that the patient can adjust independently).

[0055] In some embodiments, the stimulation parameters of the stimulator can be adjusted in current mode or voltage mode.

[0056] Programmable devices can include physician-controlled devices (i.e., devices used by physicians) and / or patient-controlled devices (i.e., devices used by patients). Physician-controlled devices are, for example, smart terminal devices such as tablets, laptops, desktop computers, and mobile phones equipped with programming software. Patient-controlled devices are, for example, smart terminal devices such as tablets, laptops, desktop computers, and mobile phones equipped with programming software; patient-controlled devices can also be other electronic devices with programming functions (e.g., chargers with programming functions, electrophysiological acquisition devices, etc.).

[0057] like Figures 1-5 As shown, this embodiment provides an electrical stimulation system, including a pulse generator 100 and a wire 200. The pulse generator 100 includes a body 1 and a locking assembly 2. The locking assembly 2 includes a locking block 21 and a locking member 22. The locking block 21 is disposed on the body 1 and has a through hole 211 and a locking hole 212 that are interconnected. Exemplarily, the center line of the through hole 211 and the center line of the locking hole 212 are set at an angle, and the wire 200 passes through the through hole 211. The locking member 22 is fixed in the locking hole 212, and the first side 225 of the locking member 22 abuts against the second side 202 of the wire 200.

[0058] During assembly, the lead wire 200 passes through the through hole 211, and the locking member 22 connects to the locking hole 212, so that the first circumferential side 225 of the locking member 22 presses against the second circumferential side 202 of the lead wire 200. This ensures the accuracy of the lead wire 200's position during initial assembly. Furthermore, since the center lines of the through hole 211 and the locking hole 212 are set at an angle (i.e., the locking force direction of the lead wire 200 is at an angle to its installation direction, and the installation direction of the locking member 22 is at an angle to its force direction), it simultaneously prevents the lead wire 200 and the locking member 22 from loosening, reducing the risk of loosening. This ensures the stability of the locking mechanism between the pulse generator 100 and the lead wire 200 under random vibration and impact conditions, increasing implantation safety. The locking assembly 2 prevents displacement of the pulse generator 100 and the lead wire 200, avoiding stimulation failure and ensuring the effectiveness of electrode stimulation.

[0059] The cross-section of the locking member 22 can be of any shape. For example, if the cross-section of the locking member 22 is polygonal, then the first side surface 225 is one of its planes; if the cross-section of the locking member 22 is circular, then the first side surface 225 is the circumferential surface of the locking member 22. Alternatively, the locking member 22 can directly press against the wire 200. The cross-section of the wire 200 can also be of any shape. For example, if the cross-section of the wire 200 is polygonal, then the second side surface 202 is one of its planes; if the cross-section of the wire 200 is circular, then the second side surface 202 is the circumferential surface of the wire 200. The locking member 22 can also indirectly press against the wire 200 through an intermediate structure, in which case the surface of the intermediate structure is the second side surface 202.

[0060] like Figures 1-5 , Figure 9 and Figure 10As shown, in one embodiment, the body 1 is provided with a limiting groove 13, a first mounting groove 11, and a second mounting groove 12. The locking block 21 is limited in the limiting groove 13 to ensure installation stability, thereby ensuring the installation stability of the wire 200. The pulse generator 100 also includes a channel module 5, a first sealing block 3, and a second sealing block 4. The channel module 5 is disposed in the body 1, the first sealing block 3 is disposed in the first mounting groove 11, and the second sealing block 4 is disposed in the second mounting groove 12. The channel module 5, the locking element 22, and the second sealing block 4 are arranged sequentially along the extension direction of the wire 200. The first sealing block 3 abuts against the locking block 21 on one side along the installation direction of the locking element 22 and the locking block 21.

[0061] The channel module 5 is provided with a wire-passing groove 51, and the second sealing block 4 is provided with a through hole. The wire-passing groove 51, the through hole 211, and the through hole are connected in sequence. The wire 200 passes through the wire-passing groove 51, the through hole 211, and the through hole. The end face 203 of the wire 200 is in contact with the bottom 52 of the wire-passing groove 51. The wire 200 passes through the through hole 211, and the other end extends out of the pulse generator 100 through the through hole. The contact between the end face 203 of the wire 200 and the bottom 52 of the wire-passing groove 51 ensures the reliability of the electrical connection between the two.

[0062] During assembly, the channel module 5 is first installed inside the main body 1, the locking block 21 is limited in the limiting groove 13, and the wire 200 passes through the wire groove 51 and the through hole 211. Then, the locking component 22 is installed in the locking hole 212 to lock the wire 200. Finally, the first sealing block 3 and the second sealing block 4 are installed respectively to seal the locking component 2 and protect the inside of the pulse generator 100. The first mounting groove 11 and the first sealing block 3, as well as the second mounting groove 12 and the second sealing block 4, facilitate the installation and removal of the locking component 22. The wire 200 passes through and is fixed in the through hole, thus re-fixing the wire 200.

[0063] Optionally, the locking block 21 is positioned within the limiting groove 13 along the extension direction of the wire 200. The second sealing block 4 and the locking block 21 are mutually limiting and engaged, with the limiting direction between them perpendicular to the extension direction of the wire 200 and perpendicular to the installation direction of the locking member 22 and the locking block 21, thereby ensuring the installation accuracy of the locking block 21. For example, the second sealing block 4 is provided with a latching protrusion 41 and the locking block 21 is provided with a latching groove 213, and the two are engaged to achieve limiting.

[0064] The angle between the centerline of the through hole 211 and the centerline of the lock hole 212 is 90°, meaning that the locking force direction of the wire 200 is perpendicular to the loosening direction of the locking member 22, thus maximally preventing the locking member 22 from loosening. In other embodiments, the angle between the centerline of the through hole 211 and the centerline of the lock hole 212 can also be 30°, 45°, 60°, or 80°, etc. The closer they are to being perpendicular, the better the effect of preventing the locking member 22 from loosening.

[0065] like Figure 8 As shown, a locking ring 201 is provided on the outer periphery of the conductor 200, forming a second side surface 202. The locking member 22 is pressed against the locking ring 201 to prevent the locking member 22 from directly contacting the conductor 200 and causing damage to the conductor 200. The locking ring 201 can be installed on or wrapped around the conductor 200. The material of the locking ring 201 can be a metal such as aluminum or steel, or a non-metallic material such as plastic; there is no limitation. The length of the locking ring 201 can be set according to requirements, allowing the locking member 22 to be fully pressed against the locking ring 201, or partially pressed against the locking ring 201 and partially pressed against the conductor 200.

[0066] Considering the need for surgeons to change or reinsert leads during surgery, leads may need to be repeatedly inserted into or removed from the pulse generator. Therefore, if... Figures 1-7 As shown, the lock hole 212 includes a threaded hole 2121 and a countersunk groove 2122, which is connected to the through hole 211; the locking member 22 includes a threaded rod 221 and a boss 222, which are threadedly engaged with the threaded hole 2121 to connect the locking member 22 and the locking block 21. The boss 222 is located in the countersunk groove 2122, so that the side of the boss 222 forms at least a portion of the first side 225 to press against the second side 202. The structure is simple, easy to operate, and highly reliable. It is convenient to repeatedly disassemble the locking member 22 to realize the disassembly and assembly of the wire 200, ensuring the convenience of repeated assembly and disassembly.

[0067] The diameter of the boss 222 is larger than the diameter of the threaded rod 221, so that the connection structure between the boss 222 and the threaded rod 221 has a column, an inclined surface 226, and a first side surface 225 formed by the side of the boss 222, or the first side surface 225 is formed by the side of the boss 222 and at least part of the inclined surface 226. During the installation of the locking member 22, the threaded rod 221, the connection structure with the inclined surface 226, and the boss 222 sequentially enter the locking hole 212, and contact the wire 200 through the inclined surface 226, gradually increasing the squeezing force of the locking member 22 on the wire 200, preventing the wire 200 from being squeezed and damaged. Furthermore, the inclined surface 226 acts as a guide, reducing the resistance encountered by the locking member 22 during installation and facilitating the installation of the locking member 22.

[0068] The locking assembly 2 also includes a seal 23. The outer periphery of the boss 222 has an annular groove 223, and the seal 23 is disposed in the annular groove 223 to ensure a sealed connection between the boss 222 and the recess 2122, guaranteeing the internal sealing of the pulse generator 100. For example, the seal 23 can be an O-ring, fitted into the annular groove 223. The outer diameter of the seal 23 is larger than both the outer diameter of the boss 222 and the inner diameter of the recess 2122, so that the seal 23 is press-fitted with the sidewall of the recess 2122, meaning the outer peripheral surface of the seal 23 abuts against the sidewall of the recess 2122, ensuring a sealing effect. The locking component 22 has a mating part 224 for mating with an external structure, allowing the locking component 22 to be threadedly connected to the lock hole 212, facilitating the disassembly of the locking component 22. Specifically, the mating part 224 is a hexagonal groove formed at the end of the boss 222 opposite to the threaded rod 221. When the torque wrench is inserted into the hexagonal groove, the threaded rod 221 in the locking member 22 engages with the threaded hole 2121 in the locking block 21. When the torque wrench reaches the given torque, the boss 222 and the locking ring 201 of the wire 200 are interference-fitted, thereby locking the wire 200.

[0069] Optionally, the locking block 21 has at least one through hole 211 and at least one locking hole 212, with the through holes 211 and locking holes 212 corresponding one-to-one; the locking member 22 and the wire 200 are each provided at least one, with the wire 200 correspondingly passing through the through hole 211 and the locking member 22 correspondingly fixed in the locking hole 212. The number of wires 200 is set according to requirements, and the number of through holes 211 and locking holes 212 of the locking member 22 and the locking block 21 that cooperates with the locking member 22 are adaptively set. For example, there are two wires 200, one is an electrode wire and the other is an extension wire, and there are two locking members 22. The locking member 22 has two through holes 211 and two locking holes 212, with the through holes 211 and locking holes 212 corresponding one-to-one, and the two wires 200 and the two through holes 211 corresponding one-to-one, thereby realizing the locking of the two wires 200.

[0070] Optionally, the electrical stimulation system also includes a fixed base (not shown in the figure), on which the pulse generator 100 is mounted. After the pulse generator 100 and the wires 200 are locked by the locking assembly 2, the fixed base is installed in a location such as the skull or chest. Exemplarily, the fixed base is installed by fasteners such as bolts.

[0071] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electrical stimulation system, characterized in that, Includes a pulse generator (100) and a wire (200), the pulse generator (100) including a body (1) and a locking assembly (2); the locking assembly (2) includes: A locking block (21) is provided on the body (1). The locking block (21) has a through hole (211) and a lock hole (212) that are interconnected. The wire (200) passes through the through hole (211). A locking member (22) is held in the lock hole (212), and the first side (225) of the locking member (22) presses against the second side (202) of the wire (200).

2. The electrical stimulation system according to claim 1, characterized in that, The lock hole (212) includes a threaded hole (2121) and a countersunk groove (2122), the countersunk groove (2122) and the through hole (211) are connected; the locking member (22) includes a threaded rod (221) and a boss (222), the threaded rod (221) and the threaded hole (2121) are threadedly engaged, so that the locking member (22) and the locking block (21) are connected, the boss (222) is provided in the countersunk groove (2122), and the side of the boss (222) forms at least a portion of the first side surface (225) to press against the second side surface (202).

3. The electrical stimulation system according to claim 2, characterized in that, The diameter of the boss (222) is larger than the diameter of the threaded rod (221), so that the connection structure between the boss (222) and the threaded rod (221) has an inclined surface (226). The first side surface (225) is formed by the side surface of the boss (222), or the first side surface (225) is formed by the side surface of the boss (222) and at least part of the inclined surface (226).

4. The electrical stimulation system according to claim 2, characterized in that, The locking assembly (2) further includes a seal (23), and the outer periphery of the boss (222) is provided with an annular groove (223). The seal (23) is disposed in the annular groove (223) so that the boss (222) and the groove (2122) are sealed together.

5. The electrical stimulation system according to claim 4, characterized in that, The outer diameter of the seal (23) is larger than the outer diameter of the boss (222) and the inner diameter of the groove (2122) so that the seal (23) and the side wall of the groove (2122) are interference fit.

6. The electrical stimulation system according to claim 1, characterized in that, The locking member (22) is provided with a mating part (224), which is used to mate with an external structure so that the locking member (22) is threadedly connected to the lock hole (212).

7. The electrical stimulation system according to claim 1, characterized in that, The angle between the centerline of the through hole (211) and the centerline of the lock hole (212) is 90°.

8. The electrical stimulation system according to claim 1, characterized in that, The outer periphery of the conductor (200) is provided with a locking ring (201), and the locking member (22) is pressed against the locking ring (201).

9. The electrical stimulation system according to claim 1, characterized in that, The pulse generator (100) further includes a first sealing block (3), the body (1) is provided with a first mounting groove (11), the first sealing block (3) is provided in the first mounting groove (11) and abuts against the locking block (21) on one side along the mounting direction of the locking member (22) and the locking block (21).

10. The electrical stimulation system according to claim 1, characterized in that, The pulse generator (100) further includes a second sealing block (4). The body (1) is provided with a second mounting groove (12). The second sealing block (4) is located in the second mounting groove (12) and abuts against the locking block (21) on one side along the extension direction of the wire (200). The second sealing block (4) is provided with a through hole, through which the wire (200) passes.

11. The electrical stimulation system according to any one of claims 1-10, characterized in that, The pulse generator (100) also includes a channel module (5), which is located inside the body (1). The channel module (5) has a wire groove (51) that is connected to the through hole (211). The wire (200) passes through the wire groove (51) and the through hole (211). The end face (203) of the wire (200) is in contact with the bottom (52) of the wire groove (51).

12. The electrical stimulation system according to any one of claims 1-10, characterized in that, The locking block (21) is provided with at least one through hole (211) and at least one lock hole (212), and the through hole (211) and the lock hole (212) are provided in a one-to-one correspondence; the locking member (22) and the wire (200) are provided with at least one, the wire (200) is correspondingly inserted through the through hole (211), and the locking member (22) is correspondingly fixed in the lock hole (212).

Images