Channel module, implantable stimulator, and implantable stimulation system

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, and discloses a channel module, an implantable stimulator and an implantable stimulation system. The channel module comprises a spring ring and a plurality of connecting units. The plurality of connecting units are stacked to form a through accommodation channel, a V-shaped groove is arranged in the accommodation channel, the spring ring is arranged in the V-shaped groove, and at least part of the inner wall of the V-shaped groove is electrically connected with the spring ring. Through the utility model, the installation stability of the spring ring can be ensured, at least two contact points are realized on the single-turn cross section of the spring ring, and the reliability of electrical connection is realized.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to channel modules, implantable stimulators, and implantable stimulation systems. Background Technology

[0002] In deep brain stimulation (DBS) systems, the implantable pulse generator (IPG) and extension leads, as well as the extension leads and electrode leads, need to be assembled and electrically connected during surgery. To achieve a stable electrical connection, an elastic connection structure, such as a coiled spring, is often used.

[0003] Specifically, the inclined coil spring is usually fixed inside the conductive housing. The inclined coil spring abuts against the inner wall of the conductive housing, and the inclined coil spring abuts against the metal ring of the wire or the metal ring of the electrode, thereby achieving a stable electrical connection.

[0004] Currently, the common method for fixing helical coil springs involves assembling two opposing conductive housing parts and then welding them together. The inner walls of these two conductive housing parts, used to mate with the helical coil spring, can form a square or semi-circular shape. However, due to assembly process limitations, the inner walls of the two conductive housing parts cannot form a perfectly accurate contact surface; uneven areas always appear at the joint, affecting the contact with the helical coil spring and reducing the stability of the electrical connection. Furthermore, the square or semi-circular contact surface cannot limit the movement of the helical coil spring, causing it to shift to one side during wire or electrode insertion, thus affecting contact accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a channel module, an implantable stimulator, and an implantable stimulation system to ensure the stable installation of the inclined coil spring, thereby achieving reliable electrical connection.

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

[0007] Channel module, including:

[0008] Spring coil;

[0009] A plurality of connecting units are stacked to form a through receiving channel. A V-shaped groove is provided in the receiving channel. A spring coil is disposed in the V-shaped groove, and at least a portion of the inner wall of the V-shaped groove is electrically connected to the spring coil.

[0010] As an alternative to the channel module, the single-turn cross-section of the spring coil has at least two electrical contact points with the V-groove.

[0011] As an alternative to the channel module, the connection unit includes a conductor, and the V-groove is disposed on the conductor.

[0012] As an alternative to the channel module, the connection unit further includes a mounting body having a limiting groove extending along a first direction, and the conductor being inserted into the limiting groove along the first direction.

[0013] As an alternative to the channel module, the connection unit further includes a fixing member, which is inserted into the limiting groove along the first direction and abuts against the end of the conductor away from the bottom wall of the limiting groove.

[0014] As an alternative to the channel module, the two ends of the spring coil along the first direction abut against the bottom wall and the fixing member, respectively.

[0015] As an alternative to the channel module, multiple connection units are sequentially plugged in, and the channel module further includes a first seal, which is at least partially housed within the mounting body of one of two adjacent connection units.

[0016] As an alternative to the channel module, the mounting body is a non-metallic component, and the density of the mounting body is less than the density of the conductor.

[0017] As an alternative to the channel module, the connection unit includes an insulating housing and a conductive housing, and the V-shaped groove is formed by the insulating housing and the conductive housing together.

[0018] As an alternative to the channel module, the V-groove includes a first inclined surface and a second inclined surface, which intersect. The first inclined surface is formed by the inner wall of the conductive housing, and the second inclined surface is formed by connecting and combining the inner wall of the conductive housing and the inner wall of the insulating housing.

[0019] As an alternative to the channel module, the inner wall of the conductive housing extends outward along the opening of the V-groove to form a first limiting surface, and the inner wall of the insulating housing extends outward along the opening of the V-groove to form a second limiting surface. The first limiting surface and the second limiting surface respectively abut against the two ends of the spring coil in the axial direction.

[0020] As an alternative to the channel module, a slot is formed on the conductive housing, and a plug-in portion is provided on the insulating housing, the plug-in portion being inserted into the slot.

[0021] As an alternative to the channel module, the conductive housing and the insulating housing are plugged together to form the V-groove, and the spring coil forms electrical contact points with the first inclined surface and a portion of the second inclined surface on the conductive housing, respectively.

[0022] As an alternative to the channel module, the channel module further includes a second seal disposed between two adjacent connection units.

[0023] An implantable stimulator includes a pulse generator body and a channel module as described in any of the above embodiments. The channel module is mounted above the pulse generator body. The pulse generator body is provided with a feedthrough and a circuit board. One end of the feedthrough is electrically connected to the circuit board, and the other end is electrically connected to the channel module.

[0024] An implantable stimulation system includes a lead wire and the implantable stimulator described in the above scheme. The lead wire includes a plurality of connecting contact points. After the lead wire is inserted into the receiving channel, the plurality of connecting contact points are electrically connected to the connecting unit one by one.

[0025] Beneficial effects:

[0026] In the first aspect of this invention, multiple V-grooves are spaced apart on the axial inner wall of the receiving channel, and each V-groove has at least two contact points electrically connected to a single turn of the spring coil. Using V-grooves to limit the spring coil improves its positioning accuracy, enhances the contact between the connecting unit and the spring coil, and further improves the stability of the electrical connection. During operation, the spring coil maintains axial stability under the limiting effect of the V-grooves.

[0027] In a second aspect of this invention, the implantable stimulator based on this channel module can improve the contact state of the electrical connection and enhance its stability and reliability. Furthermore, a portion of the conductive structure of the channel module is designed with a low-density insulating material, thereby achieving the goal of miniaturization and weight reduction of the implantable product.

[0028] In a third aspect of this invention, the implantable stimulation system based on this channel module can ensure the stability of the electrical connection. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of the channel module and spring coil provided in Embodiment 1 of this utility model;

[0030] Figure 2 This is a cross-sectional view of a portion of the channel module provided in Embodiment 1 of this utility model;

[0031] Figure 3 This is a cross-sectional view of a partial channel module of the hidden conductor provided in Embodiment 1 of this utility model;

[0032] Figure 4 This is a cross-sectional view of the implantable stimulation system provided in Embodiment 1 of this utility model;

[0033] Figure 5 This is a cross-sectional view of the channel module and spring coil provided in Embodiment 2 of this utility model;

[0034] Figure 6 This is a cross-sectional view of a portion of the channel module provided in Embodiment 2 of this utility model;

[0035] Figure 7 This is a cross-sectional view of the conductive housing provided in Embodiment 2 of this utility model;

[0036] Figure 8 This is a cross-sectional view of the connecting unit in Embodiment 2 of this utility model;

[0037] Figure 9 This is a cross-sectional view of the implantable stimulation system of Embodiment 2 of this utility model.

[0038] In the picture:

[0039] X, first direction;

[0040] 100. Spring coil;

[0041] 200, connecting unit; 210, receiving channel; 220, conductor; 230, mounting body; 231, limiting groove; 2311, bottom wall; 240, fixing member; 250, insulating shell; 251, second limiting surface; 252, plug-in part; 260, conductive shell; 261, first limiting surface; 262, slot;

[0042] 3. V-groove; 31. First inclined surface; 32. Second inclined surface;

[0043] 5. First seal; 6. Second seal; 7. Pulse generator body; 71. Circuit board; 8. Wire; 81. Connecting contact point. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0045] 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.

[0046] 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.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] The technical field of the embodiments of this application and the related terms that may be involved in this application are briefly described below.

[0049] 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).

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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 electrode 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.

[0058] 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.

[0059] 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.

[0060] 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).

[0061] In some embodiments, the stimulation parameters of the stimulator can be adjusted in current mode or voltage mode.

[0062] 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.).

[0063] Please see the appendix Figure 1 - Appendix Figure 4 In this embodiment, the channel module can be applied to the wire 8, where the wire 8 can be an extension wire or an electrode wire.

[0064] The channel module includes a spring coil 100 and several connecting units 200. The several connecting units 200 are stacked to form a through receiving channel 210. A V-shaped groove 3 is provided in the receiving channel 210. The spring coil 100 is disposed in the V-shaped groove 3. At least a portion of the inner wall of the V-shaped groove 3 is electrically connected to the spring coil 100, such that a single turn of the spring coil 100 has at least two electrical contact points with the V-shaped groove 3.

[0065] Specifically, the spring coil 100 is a helical coil spring. The connecting unit 200 is a circumferentially rotating body, wherein the connecting unit 200 has a through receiving channel 210 along the axial direction. Multiple V-grooves 3 are spaced apart on the axial inner wall of the receiving channel 210, and the spring coil 100 is received within the V-grooves 3. The axial inner wall portion of the receiving channel 210 is electrically connected to the spring coil 100. Using V-grooves 3 to limit the spring coil 100 can improve the positioning accuracy of the spring coil 100, improve the contact state between the connecting unit 200 and the spring coil 100, and further enhance the stability of the electrical connection.

[0066] Optionally, the connection unit 200 includes a conductor 220, and a V-groove 3 is disposed on the conductor 220.

[0067] Specifically, the conductor 220 is made of a conductive metal material, such as copper or a copper alloy, and forms a metal ring structure. An annular V-shaped groove 3 is formed on the inner wall of the conductor 220. The V-shaped groove 3 is formed by the recess of the inner wall of the conductor 220. The opening angle and width of the V-shaped groove 3 can be optimized and adjusted according to the size of the spring coil 100.

[0068] In this embodiment, the V-groove 3 is integrally formed on the inner wall of the conductor 220, which also facilitates processing and dimensional consistency. The V-groove 3 ensures that there are two contact points electrically connected to the spring coil 100 at the same cross-section. Furthermore, the spring coil 100 maintains axial stability under the limiting effect of the V-groove 3.

[0069] Furthermore, the connection unit 200 also includes a mounting body 230, which has a limiting groove 231 extending along the first direction X, and the conductor 220 is inserted into the limiting groove 231 along the first direction X.

[0070] Specifically, the mounting body 230 can be made of non-metallic components. The density of the mounting body 230 is less than that of the conductor 220, which can make the overall channel module lighter. At the same time, by reducing the thickness of the mounting body 230, the overall channel module can also be miniaturized and lightweight. Replacing some metal structures with non-metallic structures reduces the amount of metal used, thereby reducing material costs and improving NMR compatibility and communication performance.

[0071] Optionally, the mounting body 230 and the conductor 220 can be connected by a hole-shaft mating method to improve the convenience of connection.

[0072] The mounting body 230 has a cylindrical limiting groove 231 in the first direction X, wherein the first direction X is axial, and the limiting groove 231 is used to install the conductor 220. During installation, the conductor 220 can be directly inserted into the limiting groove 231 along the first direction X, and the annular boss in the limiting groove 231 is used to restrict the conductor 220, that is, the conductor 220 abuts against the annular boss.

[0073] Optionally, the connecting unit 200 further includes a fixing member 240, which is inserted into the limiting groove 231 along the first direction X, and the fixing member 240 abuts against one end of the conductor 220 away from the bottom wall 2311 of the limiting groove 231.

[0074] Specifically, the fastener 240 is a ring-shaped part. The fastener 240 and the mounting body 230 can be made of the same non-metallic material or non-metallic materials with similar performance to reduce the incompatibility of the sealing interface, reduce the assembly difficulty of the two, and improve the overall sealing performance.

[0075] In this embodiment, after the fixing member 240 is inserted into the limiting groove 231, it abuts against the end of the conductor 220 away from the bottom wall 2311, so that the conductor 220 is stably fixed inside the mounting body 230, avoiding displacement of the conductor 220 during frequent insertion and removal, thereby affecting the reliability of the electrical connection.

[0076] Optionally, the two ends of the spring coil 100 along the first direction X abut against the bottom wall 2311 and the fixing member 240, respectively.

[0077] In this embodiment, the spring coil 100 can not only be limited by the V-groove 3, but also further constrained by the bottom wall 2311 of the limiting groove 231 and the end face of the fixing member 240, so that the spring coil 100 will not come out of the V-groove 3 during the insertion and removal process, thus further ensuring the reliability of the electrical connection.

[0078] Optionally, multiple connection units 200 are inserted sequentially, and the channel module also includes a first seal 5, which is at least partially housed within one of the mounting bodies 230 of two adjacent connection units 200.

[0079] Since multiple connection contact points 81 are typically provided on the same conductor 8, adaptably, multiple connection units 200 can be sequentially inserted, and conductors 220 and spring coils 100 are provided inside the corresponding connection units 200 to contact the corresponding connection contact points 81, thereby improving the adaptability of the channel module. Furthermore, a first sealing element 5 is provided between two adjacent connection units 200. The first sealing element 5 can be embedded inside one of the mounting bodies 230, and the first sealing element 5 can be a sealing ring to enhance the sealing performance of adjacent units.

[0080] In this embodiment, a multi-contact structure is formed by simply inserting multiple connection units 200 in sequence, which improves the unitization level of the channel module and ensures assemblability.

[0081] The second aspect of this embodiment relates to an implantable stimulator, which includes a pulse generator body 7 and a channel module above it. The channel module is mounted above the pulse generator body 7. The pulse generator body 7 is provided with a feedthrough and a circuit board 71. One end of the feedthrough is electrically connected to the circuit board 71, and the other end is electrically connected to the channel module.

[0082] Specifically, circuit board 71 is used to control the electrical stimulation parameters of the implantable stimulator, and feedthrough is used to realize the electrical connection and signal transmission between the channel module and circuit board 71, and may also involve functions such as isolation, filtering or signal processing. The pulse generator body 7, feedthrough and circuit board 71 are all existing structures, and their functions can be adapted by referring to existing technologies or products.

[0083] Implantable stimulators based on this channel module can improve the contact state of electrical connections and enhance the stability of electrical connections.

[0084] The second aspect of this embodiment relates to an implantable stimulation system, including a lead wire 8 and more implantable stimulators. The lead wire 8 includes a plurality of connecting contact points 81. After the lead wire 8 is inserted into the receiving channel 210, the plurality of connecting contact points 81 are electrically connected to the connecting unit 200 in a one-to-one correspondence.

[0085] Specifically, multiple annular connection contacts 81 are arranged sequentially at intervals on the wire 8. When the wire 8 is inserted into the receiving channel 210 of the channel module, the connection contacts 81 contact the spring coil 100 and are locked under the action of the spring coil 100, thereby completing a stable electrical connection.

[0086] The implantable stimulation system based on this channel module can ensure the stability of the electrical connection.

[0087] Example 2

[0088] Please see the appendix Figure 5 - Appendix Figure 9 The difference between this embodiment and Embodiment 1 lies in the different composition of the V-groove 3. Specifically, the connecting unit 200 includes an insulating shell 250 and a conductive shell 260, and the V-groove 3 is formed by the insulating shell 250 and the conductive shell 260 together.

[0089] Specifically, both the insulating shell 250 and the conductive shell 260 are circumferentially rotating bodies. The conductive shell 260, to ensure conductivity, is made of metal, such as copper or a copper alloy, and forms a metal ring. The insulating shell 250 is a non-metallic component, and its density is lower than that of the conductive shell 260. This reduces the overall weight of the channel module, and miniaturization and weight reduction can also be achieved by reducing the thickness of the insulating shell 250. In this embodiment, partially replacing the metallic structure with a non-metallic structure reduces the amount of metal used, thereby lowering material costs and improving NMR compatibility and communication performance.

[0090] In this embodiment, the V-groove 3 is formed by the insulating shell 250 and the conductive shell 260. Using the V-groove 3 to limit the spring coil 100 improves the positioning accuracy of the spring coil 100, enhances the contact between the conductive shell 260 and the spring coil 100, and further improves the stability of the electrical connection. In addition, the spring coil 100 maintains axial stability under the limiting effect of the V-groove 3.

[0091] In this embodiment, the insulating housing 250 and the conductive housing 260 can be connected by a hole-shaft mating method to improve the convenience of connection.

[0092] Optionally, the V-groove 3 includes a first inclined surface 31 and a second inclined surface 32, which intersect. The first inclined surface 31 is formed by the inner wall of the conductive housing 260, and the second inclined surface 32 is formed by the connection and combination of the inner wall of the conductive housing 260 and the inner wall of the insulating housing 250.

[0093] In this embodiment, a slot 262 is formed on the conductive housing 260, and a plug-in portion 252 is provided on the insulating housing 250, which is inserted into the slot 262. Adhesive can be applied to the contact area before insertion to ensure reliable bonding, or ultrasonic welding can be used to fix the two together. After the insulating housing 250 and the conductive housing 260 are inserted, a second inclined surface 32 is naturally formed and symmetrically arranged with the first inclined surface 31. The insertion of the conductive housing 260 and the insulating housing 250 forms a V-shaped groove 3. The spring coil 100 forms electrical contact points with the first inclined surface 31 and a portion of the second inclined surface 32 on the conductive housing 260, respectively. At least two electrical contact points ensure the reliability of the electrical connection.

[0094] This split structure of the V-groove 3 facilitates the assembly of the spring coil 100. During assembly, the spring coil 100 is first fixed to the conductive housing 260, and then the insulating housing 250 is inserted into the conductive housing 260 to form a complete V-groove 3 to limit the spring coil 100.

[0095] Furthermore, the inner wall of the conductive housing 260 extends outward along the opening of the V-groove 3 to form a first limiting surface 261, and the inner wall of the insulating housing 250 extends outward along the opening of the V-groove 3 to form a second limiting surface 251. The first limiting surface 261 and the second limiting surface 251 respectively abut against the two ends of the spring coil 100 in the axial direction.

[0096] In this embodiment, the first limiting surface 261 and the second limiting surface 251 are parallel to each other and respectively abut against the two ends of the spring coil 100 along the axial direction. During the insertion and removal process, the spring coil 100 will not detach from the constraints of the first limiting surface 261 and the second limiting surface 251, ensuring the axial positional stability of the spring coil 100 and further realizing the stability and reliability of the electrical connection.

[0097] Optionally, the channel module also includes a second seal 6, which is disposed between two adjacent connection units 200.

[0098] In this embodiment, by sequentially inserting connecting units 200, and by providing a conductive housing 260 and a spring coil 100 inside each connecting unit 200 to contact the corresponding annular contact, the adaptability of the installation structure is improved. Furthermore, a second sealing element 6, which can be a sealing ring, is provided between two connecting units 200 to enhance the sealing performance of adjacent units.

[0099] The second aspect of this embodiment relates to an implantable stimulator, which includes a pulse generator body 7 and a channel module above it. The channel module is mounted above the pulse generator body 7. The pulse generator body 7 is provided with a feedthrough and a circuit board 71. One end of the feedthrough is electrically connected to the circuit board 71, and the other end is electrically connected to the channel module.

[0100] Specifically, circuit board 71 is used to control the electrical stimulation parameters of the implantable stimulator, and feedthrough is used to connect the channel module to circuit board 71 and transmit signals. It may also involve functions such as isolation, filtering, or signal processing. The pulse generator body 7, feedthrough, and circuit board 71 are all existing structures and can be adapted for use by referring to existing technologies or products.

[0101] Implantable stimulators based on this channel module can improve the contact state of electrical connections and enhance the stability of electrical connections.

[0102] The second aspect of this embodiment relates to an implantable stimulation system, including a lead wire 8 and more implantable stimulators. The lead wire 8 includes a plurality of connecting contact points 81. After the lead wire 8 is inserted into the receiving channel 210, the plurality of connecting contact points 81 are electrically connected to the connecting unit 200 in a one-to-one correspondence.

[0103] Specifically, multiple annular connection contacts 81 are arranged sequentially at intervals on the wire 8. When the wire 8 is inserted into the receiving channel 210 of the channel module, the connection contacts 81 contact the spring coil 100 and are locked under the action of the spring coil 100, thereby completing a stable electrical connection.

[0104] The implantable stimulation system based on this channel module can ensure the stability of the electrical connection.

[0105] 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 various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments 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.

[0106] 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 various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments 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. A channel module, characterized in that The spring ring (100) is arranged in the V-shaped groove (3), and at least part of the inner wall of the V-shaped groove (3) is electrically connected with the spring ring (100). The single-turn cross section of the spring ring (100) has at least two electrical contact points with the V-shaped groove (3). The connection unit (200) comprises a conductive body (220), and the V-shaped groove (3) is arranged in the conductive body (220).

2. The tunnel module of claim 1, wherein, The connection unit (200) further comprises a mounting body (230) having a limiting groove (231) extending along a first direction (X), and the conductive body (220) is inserted into the limiting groove (231) along the first direction (X).

3. The access module of claim 1, wherein, The connection unit (200) further comprises a fixing member (240) inserted into the limiting groove (231) along the first direction (X), and the fixing member (240) abuts against one end of the conductive body (220) away from the bottom wall (2311) of the limiting groove (231).

4. The access module of claim 3, wherein, The two ends of the spring ring (100) along the first direction (X) abut against the bottom wall (2311) and the fixing member (240) respectively.

5. The access module of claim 4, wherein, A plurality of the connection units (200) are sequentially connected, and the channel module further comprises a first sealing member (5) at least partially arranged in one of the mounting bodies (230) of two adjacent connection units (200).

6. The access module of claim 5, wherein, The mounting body (230) is a non-metal member, and the density of the mounting body (230) is smaller than that of the conductive body (220).

7. The access module of claim 4, wherein, The connection unit (200) comprises an insulating shell (250) and a conductive shell (260), and the V-shaped groove (3) is formed by the insulating shell (250) and the conductive shell (260) together.

8. The access module of claim 4, wherein, The V-shaped groove (3) comprises a first inclined surface (31) and a second inclined surface (32), the first inclined surface (31) and the second inclined surface (32) intersect, the first inclined surface (31) is formed by the inner wall of the conductive shell (260), and the second inclined surface (32) is formed by the combination of the inner wall of the conductive shell (260) and the inner wall of the insulating shell (250).

9. The access module of claim 1, wherein, The inner wall of the conductive shell (260) extends outward along the opening of the V-shaped groove (3) to form a first limiting surface (261), the inner wall of the insulating shell (250) extends outward along the opening of the V-shaped groove (3) to form a second limiting surface (251), and the first limiting surface (261) and the second limiting surface (251) abut against the two ends of the spring ring (100) in the axial direction respectively.

10. The access module of claim 9, wherein, The conductive shell (260) is provided with a slot (262), and the insulating shell (250) is provided with a connecting part (252) inserted into the slot (262).

11. The tunnel module of claim 10, wherein, ​ 12. The access module of claim 9, wherein, ​ 13. The access module of claim 10, wherein, The conductive shell (260) and the insulating shell (250) are inserted to form the V-shaped groove (3), and the spring ring (100) forms an electrical contact point with the first inclined surface (31) and part of the second inclined surface (32) on the conductive shell (260) respectively.

14. The access module of claim 9, wherein, The channel module further comprises a second sealing member (6) arranged between two adjacent connection units (200).

15. An implantable stimulator, characterized by The channel module is installed on the upper portion of the pulse generator body (7), and the pulse generator body (7) is provided with a feedthrough and a circuit board (71), one end of the feedthrough is electrically connected to the circuit board (71), and the other end is electrically connected to the channel module.

16. An implantable stimulation system, characterized by The lead (8) comprises a plurality of connection contacts (81), and after the lead (8) is inserted into the accommodation channel (210), the plurality of connection contacts (81) are electrically connected to the connection units (200) one by one.

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