CN215780987U

CN215780987U - Conductive component and in vivo implanted nerve stimulator

Info

Publication number: CN215780987U
Application number: CN202120165778.3U
Authority: CN
Inventors: 陈风顺; 王栋潇; 王守东
Original assignee: Hangzhou Shenluo Medical Technology Co ltd
Current assignee: Hangzhou Shenluo Medical Technology Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2022-02-11
Anticipated expiration: 2031-01-21

Abstract

The utility model provides a conductive assembly, which comprises a plurality of conductive rings and a plurality of insulating rings, wherein the conductive rings and the insulating rings are alternately arranged, and annular waterproof ribs are arranged in the insulating rings; a conductive contact ring and a conductive contact ring pressing plate are arranged in the conductive ring, and the conductive contact ring is fixed in the conductive ring by the conductive contact ring pressing plate; the conductive contact ring is a conductive spring or a conductive elastic sheet; the annular waterproof ribs are arranged to prevent body fluid entering the conductive assembly from spreading, so that the sealing performance of each conductive ring is ensured, the short circuit of a circuit where each conductive ring is located is avoided, and the reliability of the conductive assembly is improved; the conductive contact ring is fixed in the conductive ring through the conductive contact ring pressing plate, so that the conductive contact ring is prevented from falling off, the conductive contact ring is reliably connected with an electric contact point on the electrode, the power failure is prevented, and the reliability of the conductive assembly is further improved.

Description

Conductive component and in vivo implanted nerve stimulator

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a conductive component and an in-vivo implanted nerve stimulator.

Background

The in vivo implanted nerve stimulation system comprises a pulse generator implanted in a body, an electrode and an in vitro controller, wherein the pulse generator is connected with the electrode through a feed-through and a conductive component, so that a pulse signal generated by the pulse generator is transmitted to the electrode, and then the pulse signal is transmitted to an area needing stimulation through the electrode to carry out electrical stimulation. After being implanted, devices such as the pulse generator, the feed-through, the conductive component and the like can be surrounded by body fluid, and in order to ensure the normal operation of the implanted nervous system in vivo, the devices such as the pulse generator, the feed-through, the conductive component and the like need to be ensured to have good air tightness. Patent CN10328208U discloses a medical device including a metal connector enclosure, in which a sealing member is disposed at an opening to prevent body fluid from entering the opening, but in the actual use process, a small amount of body fluid still enters the conductive assembly through an electrode sealing member, and each lead connector (conductive ring) in the conductive assembly is only separated by a non-conductive lead connector (insulating member) to avoid the influence of short circuit of electrical signals on the operation of the device, and the non-conductive lead connector and the lead (electrode) are in clearance fit, once the body fluid enters the conductive assembly, the body fluid can spread into all the conductive rings along the electrode to cause the circuit breakdown of the whole conductive assembly, and the reliability is not high; in addition, the medical device has more structural parts, complex internal structure, high assembly difficulty and more size matching positions, and the problem of poor air tightness is easy to occur.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a conductive assembly and an implantable neurostimulator, in which an annular waterproof rib is disposed in an insulating ring, so that the outer diameter of an electrode is in press fit with the inner diameter of the annular waterproof rib, thereby preventing body fluid from spreading between conductive rings, ensuring the sealing performance of each conductive ring, and further improving the reliability of the conductive assembly.

To achieve the above and other related objects, the present invention provides a conductive assembly including a plurality of conductive rings and a plurality of insulating rings, the conductive rings and the insulating rings being alternately arranged; an annular waterproof rib is arranged in the insulating ring; a conductive contact ring and a conductive contact ring pressing plate are arranged in the conductive ring, and the conductive contact ring is fixed in the conductive ring by the conductive contact ring pressing plate; the conductive contact ring is a conductive spring or a conductive elastic sheet; according to the utility model, by arranging the annular waterproof rib, the attaching area of the electrode and the annular waterproof rib is increased, the gap between the assembled electrode and the annular waterproof rib is eliminated, the body fluid entering the conductive assembly is prevented from spreading along the gap, the tightness of each conductive ring is ensured, the short circuit of the circuit where each conductive ring is located is avoided, and the reliability of the conductive assembly is improved; the conductive contact ring is fixed in the conductive ring through the conductive contact ring pressing plate, so that the conductive contact ring is prevented from falling off, the conductive contact ring is reliably connected with an electric contact point on the electrode, the power failure caused by poor contact is prevented, and the reliability of the conductive assembly is further improved.

Preferably, the insulating part and the annular waterproof rib are integrally formed, and the insulating part and the annular waterproof rib are both made of elastic insulating waterproof materials, so that two adjacent conducting rings are electrically isolated, body fluid is prevented from entering the conducting assembly and spreading between the conducting rings, and the sealing performance of each conducting ring is ensured.

The utility model provides an in vivo implanted nerve stimulator, which comprises a pulse generating device and the conductive component, wherein the pulse generating device comprises a PCB component which is electrically connected with the conductive component through a feed-through needle; the conductive assembly is electrically connected with an electrode, and an electrode sealing element is arranged between the conductive assembly and the electrode; the arrangement of the electrode sealing element can prevent body fluid from entering the conductive assembly, and the arrangement of the annular waterproof ribs in the conductive assembly further prevents the body fluid from spreading among the conductive rings, so that the sealing performance of the conductive rings is ensured, and the reliability of the device is improved.

Preferably, the electrode sealing element is a sealing tee joint, the sealing tee joint comprises a first through opening, a second through opening and a third through opening, the first through opening and the second through opening are oppositely arranged on two sides of the sealing tee joint, and the third through opening is vertical to the first through opening; the first through opening is close to the conductive component, and the second through opening is far away from the conductive component; all be provided with waterproof sealing circle in first opening and the second opening, the third opening is equipped with locking screw hole, locking seal circle and locking screw from inside to outside in proper order, locking screw passes locking seal circle connects the locking screw is downthehole to avoid body fluid to pass through in second opening, the third opening gets into the electrode seal spare then get into conductive component through first opening, guarantee conductive component's gas tightness.

Preferably, the PCB assembly includes a PCB holder, a PCB board set, and a battery; the PCB group comprises a plurality of PCBs which are stacked up and down, and the PCBs are connected through flexible flat cables; an insulating sheet is arranged between every two adjacent PCB boards; the PCB group and the battery are both arranged on a PCB fixing frame, and the battery is electrically connected with the PCB group; detachably be connected with on the PCB mount will PCB board group fixes PCB gland on the PCB mount forms the PCB module through fixing PCB board back of stacking from top to bottom on the PCB mount, realizes the modularization installation, improves the installation effectiveness, and the setting of insulating piece can effectively avoid the short circuit between a plurality of PCB boards, plays the circuit protection effect, guarantees the reliability of PCB module.

Preferably, the PCB gland is an arc-shaped cover, two bosses extending along the length direction of the PCB gland are oppositely arranged on the inner wall of the PCB gland, and a sliding groove in sliding fit with the bosses is arranged on the PCB fixing frame; an opening is formed in the middle of the PCB gland, a wedge-shaped block is arranged at the opening, and a wedge-shaped groove matched with the wedge-shaped block in a clamping mode is formed in the PCB fixing frame; the push-pull fit of the PCB gland and the PCB fixing frame is realized through the matching of the boss and the sliding groove, so that the opening and closing of the PCB gland are realized, when the PCB gland slides on the sliding groove of the PCB fixing frame through the boss, the wedge block moves along with the PCB gland, in the process, the wedge block is in a jacking state until the wedge block is embedded into the wedge groove, at the moment, the wedge block resets and is clamped and jacked with the wedge groove, and the reciprocating sliding of the PCB gland is limited; when the PCB gland is required to be disassembled, the wedge-shaped block is lifted only through the opening in the PCB gland, so that the wedge-shaped block is separated from the wedge-shaped groove, and then the PCB gland is slid until the PCB gland is separated from the PCB fixing frame.

Preferably, the PCB assembly includes a temperature sensor disposed on the battery to monitor the temperature of the battery in real time, so that the battery stops charging in time when the battery is overheated due to charging, thereby improving the service life of the battery and simultaneously preventing each circuit device from being invalid due to overheating.

Preferably, the PCB assembly is disposed within a lower housing through an insulating case, the lower housing being made of a titanium alloy; a titanium alloy metal seat is welded at the top of the lower shell, a plurality of feed-through needles and two conductive needles are fixedly arranged on the titanium alloy metal seat in a penetrating mode, the lower portions of the feed-through needles and the lower portions of the conductive needles are electrically connected with the PCB, and the upper portions of the feed-through needles are electrically connected with the conductive assembly; the upper part of one conductive needle is connected with a wireless charging coil for charging a battery, and the upper part of the other conductive needle is connected with a Bluetooth coil for communicating with external equipment; an insulating upper shell which encapsulates the wireless charging coil, the Bluetooth coil, the conductive assembly and the electrode sealing element on the titanium alloy metal seat is arranged above the lower shell, so that the upper shell and the lower shell are tightly connected, and body fluid is prevented from entering the shell to cause a circuit short circuit; meanwhile, the upper insulating shell can reduce the interference on the wireless charging coil and influence the charging effect; finally, the device has compact structure installation, and ensures the compactness of the whole device.

As described above, the conductive member and the implantable neurostimulator of the present invention have the following advantages:

according to the utility model, the annular waterproof rib is arranged in the insulating ring, so that the outer diameter of the electrode is in extrusion fit with the inner diameter of the annular waterproof rib, body fluid is prevented from spreading among the conductive rings, the sealing performance of each conductive ring is ensured, and the reliability of the conductive assembly is further improved; in addition, the PCB boards are stacked up and down and then fixed on the PCB fixing frame to form a PCB module, so that modular installation is realized, the installation efficiency is improved, short circuits between the PCB boards and between the PCB and the shell can be effectively avoided due to the arrangement of the insulating sheet and the insulating shell, and the reliability of the PCB module is ensured; moreover, after all the components are assembled, the insulating glue is integrally filled and sealed to form an insulating upper shell, so that the sealing performance of the shell is guaranteed, and meanwhile, the influence on the charging effect due to the interference of a wireless charging coil is avoided; finally, the device of the utility model has simple structure, low cost, convenient assembly and good air tightness.

Drawings

FIG. 1 is a schematic diagram of the conductive assembly of the present invention in cooperation with an electrode seal and a feedthrough pin.

Fig. 2 is an internal cross-sectional view of a conductive element and electrode seal in accordance with the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

FIG. 4 is a schematic structural view of the nerve stimulator implanted in vivo after the housing is removed in accordance with the present invention.

Fig. 5 is an exploded view of an in vivo implanted neurostimulator of the present invention.

Fig. 6 is a schematic structural view of the PCB gland cooperating with the PCB holder in the present invention.

Fig. 7 is a top view of the PCB gland of the present invention.

FIG. 8 is a schematic diagram of the cooperation of a wedge on the PCB gland and a wedge on the PCB fixing frame in the present invention.

Description of the reference numerals

The electronic component comprises a lower shell 001, an insulating upper shell 002, a conductive assembly 10, a conductive ring 11, a conductive contact ring 111, a conductive contact ring pressing plate 112, an insulating ring 12, an annular waterproof rib 121, a titanium alloy metal seat 13, a feed-through pin 13a, a conductive pin 13b, an electrode sealing element 20, a first through hole 21, a second through hole 22, a third through hole 23, an axial waterproof sealing ring 211, an axial waterproof sealing ring pressing plate 212, a locking screw 231, a locking sealing ring 232, a PCB assembly 30, a PCB fixing frame 31, a sliding groove 311, a wedge-shaped groove 312, a PCB plate group 32, a PCB connecting seat 32a, a battery 33, a PCB gland 34, a boss 341, an opening 342, a wedge-shaped block 343, an insulating sheet 35, an insulating shell 36, a temperature sensor 37, a wireless charging coil 41 and a Bluetooth coil 42.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 8. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1 to 3, the present invention provides a conductive assembly, in which an electrode is inserted and fixed, and an electric signal generated by a pulse generator is transmitted to the electrode; the conductive assembly 10 includes a plurality of conductive rings 11 and a plurality of insulating rings 12, wherein the conductive rings 11 and the insulating rings 12 are alternately arranged; an annular waterproof rib 121 is arranged in the insulating ring 12, and the annular waterproof rib 121 protrudes towards the direction close to the electrode, so that the electrode is tightly attached to the annular waterproof rib 121, a gap is eliminated, and body fluid is prevented from spreading along the gap; a conductive contact ring 111 and a conductive contact ring pressing plate 112 are arranged in the conductive ring 11, the conductive contact ring pressing plate 112 is fixedly welded in the conductive ring 11, and the conductive contact ring 111 is fixed in the conductive ring 11; the conductive contact ring 111 is a conductive spring or a conductive elastic sheet, so that the conductive contact ring 111 is reliably connected with the electrode, and power failure caused by poor contact is avoided; in this embodiment, the insulating ring 12 and the waterproof muscle 121 integrated into one piece of annular, just the insulating ring 12 with the waterproof muscle 121 of annular is made by the waterproof material of elastic insulation, the waterproof material of elastic insulation is high-elastic silica gel or TPU.

As shown in fig. 1 to 8, the present invention further provides an implantable neurostimulator, which comprises two pulse generating devices and a conductive assembly 10, wherein an electrode (not shown) is electrically connected to the conductive assembly 10, an electrode sealing member 20 is arranged between the conductive assembly 30 and the electrode, and the electrode penetrates through the electrode sealing member 20 and is connected to the conductive assembly 10; the pulse generating device comprises a PCB assembly 30, wherein the PCB assembly 30 is electrically connected with the conductive assembly 10 through a feed-through needle 13 a; the conductive assembly 10 includes a plurality of conductive rings 11 and a plurality of insulating rings 12, wherein the conductive rings 11 and the insulating rings 12 are alternately arranged; an annular waterproof rib 121 is arranged in the insulating ring 12, and the annular waterproof rib 121 protrudes towards the direction close to the electrode, so that the electrode is tightly attached to the annular waterproof rib 121, a gap is eliminated, and body fluid is prevented from spreading along the gap; a conductive contact ring 111 and a conductive contact ring pressing plate 112 are arranged in the conductive ring 11, the conductive contact ring pressing plate 112 is fixedly welded in the conductive ring 11, the conductive contact ring 111 is fixed in the conductive ring 11, and the conductive contact ring 111 is a conductive spring or a conductive elastic sheet, so that the conductive contact ring 111 is reliably connected with an electrode, and power failure caused by poor contact is avoided; in this embodiment, the insulating ring 12 and the waterproof muscle 121 integrated into one piece of annular, just the insulating ring 12 with the waterproof muscle 121 of annular is made by the waterproof material of elastic insulation, the waterproof material of elastic insulation is high-elastic silica gel or TPU.

The electrodes are provided with electrical contact points at intervals, which are in one-to-one correspondence with the conductive contact rings 111, and each electrical contact point is electrically connected with the corresponding conductive contact ring 111 in the conductive assembly 10 to form a plurality of electrical signal channels.

As shown in fig. 1, 2, 4 and 5, the electrode sealing member 20 is a sealing tee, the sealing tee includes a first through opening 21, a second through opening 22 and a third through opening 23, the first through opening 21 and the second through opening 22 are oppositely disposed on two sides of the sealing tee so that the electrode can pass through, and the third through opening 23 is perpendicular to both the first through opening 21 and the second through opening 22; the first through opening 21 is close to the conductive element 10, and the second through opening 22 is far from the conductive element 10; axial waterproof sealing rings 211 are arranged in the first through hole 21 and the second through hole 22, and the axial waterproof sealing rings 211 are pressed in the first through hole 21 and the second through hole through axial sealing ring pressing plates 212; and the third port is sequentially provided with a locking screw hole, a locking sealing ring 232 and a locking screw 231 from inside to outside, and the locking screw 231 penetrates through the locking sealing ring 232 and is screwed in the locking screw hole so as to lock the electrode.

As shown in fig. 4, 5 and 8, the PCB assembly 30 includes a PCB holder 31, a PCB board group 32, a battery 33 and a temperature sensor 37; the PCB group 32 comprises a plurality of PCBs stacked up and down, the plurality of PCBs are connected by a flexible flat cable, and an insulating sheet 35 is disposed between two adjacent PCBs; the PCB group 32 and the battery 33 are both mounted on the PCB fixing frame 31, the battery 33 is electrically connected with the PCB group 32, and the battery 33 is further provided with a temperature sensor 37 for monitoring the temperature of the battery 33; the PCB pressing cover 34 for fixing the PCB plate group 32 on the PCB fixing frame 31 is detachably connected to the PCB fixing frame 31; in this embodiment, the PCB gland 34 is an arc-shaped cover, two bosses 341 extending along the length direction of the PCB gland 34 are oppositely disposed on the inner wall of the PCB gland 34, and a sliding slot 311 slidably engaged with the bosses 341 is disposed on the PCB fixing frame 31; an opening 342 is formed in the middle of the PCB gland 34, a wedge block 343 is arranged at the opening 342, and a wedge groove 312 in clamping fit with the wedge block 343 is formed in the PCB holder 31; in another embodiment, the PCB cover 34 is an arc-shaped cover, elastic clamping blocks are oppositely arranged on two sides of the inner wall of the PCB cover 34, and a clamping groove matched with the elastic clamping blocks is formed in the PCB fixing frame 31.

As shown in fig. 5, the PCB assembly 30 is disposed in a lower case 001 through an insulating case 36, the lower case 001 being made of a titanium alloy; a titanium alloy metal seat 13 is fixedly welded to the top of the lower shell 001, a plurality of feed-through needles 13a and two conducting needles 13b are fixedly arranged on the titanium alloy metal seat 13 in a penetrating manner, and the number of the feed-through needles 13a is consistent with that of the conducting rings 11; the lower part of the feed-through pin 13a and the lower part of the conductive pin 13b are both electrically connected with the PCB group 32 through a PCB connector 32a, and the upper part of the feed-through pin 13a is electrically connected with the corresponding conductive ring 11 in the conductive component 10, so that the pulse current generated by the PCB group 32 is transmitted to the stimulation end of the electrode through the feed-through pin 13a, the conductive ring 11, the conductive contact ring 111 and the electrode electrical contact point in sequence; a wireless charging coil 41 for charging the battery 33 is connected to the upper part of one conductive needle 13b, and a Bluetooth coil 42 for communicating with external equipment is connected to the upper part of the other conductive needle 13 b; after the components are assembled, the components are placed in a corresponding die and filled with insulating glue to form an insulating upper shell 002, wherein the insulating glue is made of silica gel, resin, TPU or polysulfone.

When the device is assembled, the method comprises the following steps: 1) stacking a plurality of PCB boards up and down, and arranging an insulating sheet 35 between every two adjacent PCB boards to obtain a PCB board group 32; 2) the PCB group 32, the battery 33 and the temperature sensor 37 are connected into a whole and then are placed on the PCB fixing frame 31, and are relatively fixed through the PCB gland 34 to form the PCB assembly 30; 3) welding a feed-through pin 13a and a conductive pin 13b arranged on the titanium alloy metal seat 13 on a PCB connecting seat 32a above the PCB plate group 32, then arranging the PCB assembly 30 in the lower shell 001 through an insulating shell 36, and welding and sealing the titanium alloy metal seat 13 and the lower shell 001; 4) selecting a corresponding number of conducting rings 11 according to the number of the feed-through pins 13a, welding conducting contact ring pressing plates 112 on the conducting rings 11, fixing the conducting contact rings 111 in the conducting rings 111 through the conducting contact ring pressing plates 112, arranging insulating rings 12 with internal waterproof ribs 121 between every two adjacent conducting rings 11, enabling the conducting rings 11 to be mutually electrically isolated and sealed to obtain conducting assemblies 10, then installing electrode sealing members 20 on the conducting assemblies 10, enabling electrodes to sequentially penetrate through the electrode sealing members 20 to be electrically connected with the conducting contact rings 111 in the conducting assemblies 10, screwing locking screws 231 into locking threaded holes in third through holes through the locking sealing rings 231, and locking and fixing the electrodes to obtain a conducting sealing device; (5) placing the conductive sealing device obtained in the step 4 on a titanium alloy metal base 13, welding and fixing the feed-through pins 13a and the corresponding conductive rings 11, then fixing the wireless charging coil 41 and the Bluetooth coil 42 on the upper parts of the two conductive pins 13b respectively, and finally placing the assembled parts in corresponding molds to encapsulate insulating glue, thereby obtaining the insulating upper shell 002.

In conclusion, the annular waterproof ribs are arranged in the insulating ring, so that the outer diameter of the electrode is in extrusion fit with the inner diameter of the annular waterproof ribs, the body fluid is prevented from spreading among the conducting rings, the sealing performance of each conducting ring is ensured, and the reliability of the conducting assembly is improved; in addition, the PCB boards are stacked up and down and then fixed on the PCB fixing frame to form a PCB module, so that modular installation is realized, the installation efficiency is improved, short circuits between the PCB boards and between the PCB and the shell can be effectively avoided due to the arrangement of the insulating sheet and the insulating shell, and the reliability of the PCB module is ensured; moreover, after all the components are assembled, the insulating glue is integrally filled and sealed to form an insulating upper shell, so that the sealing performance of the shell is guaranteed, and meanwhile, the influence on the charging effect due to the interference of a wireless charging coil is avoided; finally, the device of the utility model has simple structure, low cost, convenient assembly and good air tightness.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An electrically conductive assembly, characterized in that the electrically conductive assembly (10) comprises a plurality of electrically conductive rings (11) and a plurality of insulating rings (12), the electrically conductive rings (11) alternating with the insulating rings (12); an annular waterproof rib (121) is arranged in the insulating ring (12); a conductive contact ring (111) and a conductive contact ring pressing plate (112) are arranged in the conductive ring (11), and the conductive contact ring (111) is fixed in the conductive ring (11) by the conductive contact ring pressing plate (112); the conductive contact ring (111) is a conductive spring or a conductive elastic sheet.

2. The assembly according to claim 1, characterized in that said insulating ring (12) is integral with said annular waterproofing rib (121), and in that said insulating ring (12) and said annular waterproofing rib (121) are both made of an elastic insulating and waterproofing material.

3. An intracorporeal implantable neural stimulator, comprising a pulse generating device and the conductive assembly (10) of claim 1 or 2, the pulse generating device comprising a PCB assembly (30), the PCB assembly (30) being electrically connected to the conductive assembly (10) by a feed-through needle (10 a); the electrode is electrically connected with the conductive assembly (10), an electrode sealing element (20) is arranged between the conductive assembly (30) and the electrode, and the electrode penetrates through the electrode sealing element (20) to be electrically connected with a conductive contact ring (111) in the conductive assembly (10).

4. The implantable neurostimulator according to claim 3, wherein the electrode sealing member (20) is a sealing tee comprising a first port (21), a second port (22) and a third port (23), the first port (21) and the second port (22) are oppositely arranged at two sides of the sealing tee, and the third port (23) is perpendicular to the first port (21); the first through opening (21) is close to the conductive component (10), and the second through opening (22) is far away from the conductive component (10); all be provided with axial waterproof sealing washer (211) in first opening (21) and second opening (22), third opening (23) are equipped with locking screw hole, locking sealing washer (232) and locking screw (231) from inside to outside in proper order, locking screw (231) pass locking sealing washer (232) are twisted and are connect in the locking screw hole.

5. The implantable neurostimulator according to claim 3, wherein the PCB assembly (30) comprises a PCB holder (31), a PCB board set (32) and a battery (33); the PCB group (32) comprises a plurality of PCBs which are stacked up and down, the PCBs are connected through a flexible flat cable, and an insulating sheet (35) is arranged between every two adjacent PCBs; the PCB group (32) and the battery (33) are both arranged on a PCB fixing frame (31), and the battery (33) is electrically connected with the PCB group (32); the PCB fixing frame (31) is detachably provided with a PCB gland (34) which fixes the PCB plate group (32) on the PCB fixing frame (31).

6. The in vivo implanted nerve stimulator according to claim 5, wherein the PCB gland (34) is an arc-shaped cover, two bosses (341) extending along the length direction of the PCB gland (34) are oppositely arranged on the inner wall of the PCB gland (34), and a sliding slot (311) in sliding fit with the bosses (341) is arranged on the PCB fixing frame (31); an opening (342) is formed in the middle of the PCB gland (34), a wedge block (343) is arranged at the opening (342), and a wedge-shaped groove (312) matched with the wedge block (343) in a clamping mode is formed in the PCB fixing frame (31).

7. The implantable neurostimulator according to claim 4, wherein the PCB assembly (30) comprises a temperature sensor (37), the temperature sensor (37) being arranged on the battery (33).

8. The implantable neurostimulator according to claim 5 or 6 or 7, characterized in that said PCB assembly (30) is arranged inside a lower shell (001) through an insulating shell (36), said lower shell (001) being made of titanium alloy; a titanium alloy metal seat (13) is welded at the top of the lower shell (001), a plurality of feed-through needles (13a) and two conductive needles (13b) are fixedly arranged on the titanium alloy metal seat (13) in a penetrating manner, the lower parts of the feed-through needles (13a) and the lower parts of the conductive needles (13b) are electrically connected with the PCB (32), and the upper parts of the feed-through needles (13a) are electrically connected with the conductive assembly (10); a wireless charging coil (41) for charging a battery (33) is connected to the upper part of one conductive needle (13b), and a Bluetooth coil (42) for communicating with external equipment is connected to the upper part of the other conductive needle (13 b); the upper insulating shell (002) which is used for encapsulating the wireless charging coil (41), the Bluetooth coil (42), the conductive assembly (10) and the electrode sealing element (20) on the titanium alloy metal seat (13) is arranged above the lower shell (001).