Implantable medical device and nerve stimulation system

Abstract

The embodiment of the invention discloses implantable medical equipment and a nerve stimulation system, and relates to the technical field of implantable medical instruments. The wireless charging coil is configured to be connected with the circuit board in the shell through the first lead and the second lead, and the first lead is arranged in the outer side area of the coupling gap and is far away from the antenna, so that induction current on the metal side wall is reduced to be coupled to the inner side winding through the first lead, the coupling strength of the wireless charging coil and the metal side wall is reduced, and the wireless charging efficiency is improved. The current of the antenna coupled to the metal side wall is also reduced, the radiation efficiency of the antenna is increased, and the antenna performance is improved.

Description

Technical Field

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

[0002] Implantable medical devices include deep brain stimulators, implantable cortical stimulators, implantable spinal cord stimulators, implantable sacral nerve stimulators, implantable vagus nerve stimulators, implantable cardiac stimulation systems (commonly known as pacemakers) and implantable drug infusion systems. Implantable medical devices can exchange data with external devices through antennas in wireless communication, and antenna performance is also a reflection of the performance of implantable medical devices.

[0003] The internal space of implantable medical devices is limited. With the trend of miniaturization, the distance between internal components becomes smaller, and the antenna is inevitably interfered by other components, which reduces the radiation efficiency and performance of the antenna. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides an implantable medical device and a neural stimulation system to solve the problem of low antenna radiation efficiency.

[0005] A first aspect of an embodiment of the present invention provides an implantable medical device, the implantable medical device comprising:

[0006] antenna;

[0007] A wireless charging coil, comprising a coil body, a first lead wire and a second lead wire, wherein the coil body comprises an inner winding wire and an outer winding wire, and the first lead wire and the second lead wire are respectively connected to the inner winding wire and the outer winding wire; and

[0008] A main body, comprising a shell and a circuit board arranged in the shell, wherein the shell comprises a metal side wall, the wireless charging coil and the antenna are arranged outside the shell, and the coil is electrically connected to the circuit board through the first lead and the second lead;

[0009] The metal side wall is located at the side of the ring body and faces the ring body and the antenna. A coupling gap is formed between the metal side wall and the ring body. The first lead is arranged outside the coupling gap and away from the antenna.

[0010] Furthermore, the ring body includes a first extension section, a second extension section and two third extension sections in the circumferential direction, the first extension section is arranged between the second extension section and the side of the metal side wall, and the first extension section and the second extension section are connected by the two third extension sections;

[0011] One end of the first lead is connected to the inner winding of the third extension section, and the other end extends toward the main body and is electrically connected to the circuit board.

[0012] Furthermore, part of the first lead extends from the inner side of the third extension section away from the antenna to the outer side, and the extension direction is perpendicular to the extension direction of the third extension section.

[0013] Furthermore, the second lead is arranged outside the coupling gap and away from the antenna, the second lead and the first lead are connected to the same third extension section, and the antenna is arranged adjacent to another third extension section.

[0014] Furthermore, the distance from the first extension section to the metal side wall is 0.5 mm-6 mm.

[0015] Furthermore, the first lead wire includes a first extension section and a second extension section connected to each other, the first extension section is connected to the inner winding wire and extends along the axial direction of the ring body, and the second extension section extends along the radial direction of the ring body.

[0016] Further, the first lead has a first connection end electrically connected to the circuit board, the second lead has a second connection end electrically connected to the circuit board, the antenna includes a third connection end, and the antenna is arranged on the main body through the third connection end and is electrically connected to the circuit board;

[0017] The wireless charging coil is located between the second connection end and the third connection end in the projection direction of the shell, and the first connection end is located on a side of the second connection end away from the third connection end.

[0018] Furthermore, the implantable medical device further comprises:

[0019] The electrode connection part has a plug-in channel, and the plug-in channel has a socket;

[0020] The top cover is arranged on one side of the shell, the electrode connecting part, the wireless charging coil and the antenna are located in the top cover, the antenna is arranged at one end of the plug-in channel away from the socket, and the coil body is located on the side of the plug-in channel.

[0021] Further, the housing has a plurality of connection ports;

[0022] The implantable medical device further comprises:

[0023] A plurality of feed-through connectors are sealed to connect the connection ports, the feed-through connectors include conductive pins connected to the circuit board, and the antenna, the first lead and the second lead are respectively connected to the circuit board through the conductive pins.

[0024] In a second aspect, an embodiment of the present invention further provides an implantable neural stimulation system, the implantable neural stimulation system comprising:

[0025] The implantable medical device described in the first aspect above.

[0026] The implantable medical device and the neural stimulation system of the embodiment of the present invention configure the wireless charging coil to be connected to the circuit board in the housing through the first lead and the second lead, the wireless charging coil and the antenna are arranged on the same side of the metal side wall, and the first lead is arranged in the outer area of ​​the coupling gap and away from the antenna to reduce the induced current on the metal side wall from coupling to the inner winding through the first lead, so that the coupling strength between the wireless charging coil and the metal side wall is further reduced. At the same time, the current coupled from the antenna to the metal side wall is also reduced. The radiation efficiency of the antenna is increased, and the antenna performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0028] Figure 1 is a schematic structural diagram of an implantable medical device provided by a first embodiment of the present invention;

[0029] Figure 2 is a partial schematic diagram of an implantable medical device provided by a first embodiment of the present invention;

[0030] Figure 3 is a schematic structural diagram of an implantable medical device provided by a second embodiment of the present invention;

[0031] Figure 4 is a partial schematic diagram of an implantable medical device provided by a second embodiment of the present invention;

[0032] Figure 5 is a structural schematic diagram of one side of an implantable medical device provided by a third embodiment of the present invention;

[0033] Figure 6 is a schematic structural diagram of the other side of the implantable medical device provided by the third embodiment of the present invention;

[0034] Figure 7 is a partial schematic diagram of an implantable medical device provided by a third embodiment of the present invention;

[0035] Figure 8is a schematic structural diagram of a ring body provided in a third embodiment of the present invention;

[0036] Fig. 9 It is a schematic diagram of the three-dimensional structure of the ring body of the first, second and third embodiments of the present invention;

[0037] Fig.10 It is a schematic diagram of the radiation efficiency simulation of the antennas according to the first, second and third embodiments of the present invention.

[0038] Description of reference numerals:

[0039] 1-wireless charging coil; 11-first lead wire; 111-first extension section; 112-second extension section; 113-third extension section; 12-second lead wire; 13-coil body; 131-inner winding wire; 132-outer winding wire;

[0040] 2-main body; 21-housing; 221-metal side wall; 222-connection port; 22-circuit board; 23-electrode connection portion; 231-insertion channel; 232-socket; 24-coupling area; 25-coupling gap;

[0041] 3- Antenna;

[0042] 41-first extension interval; 42-second extension interval; 43-third extension interval;

[0043] 51-first connection end; 52-second connection end; 53-third connection end;

[0044] 6- Top cover;

[0045] 7-feedthrough connector; 71-feedthrough flange; 72-insulating member. DETAILED DESCRIPTION

[0046] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. It is possible for a person skilled in the art to fully understand the present invention without the description of these details. In order to avoid confusing the essence of the present invention, known methods, processes, flows, components and circuits are not described in detail.

[0047] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0048] Unless the context clearly requires otherwise, the words "include", "including" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0049] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0050] For ease of explanation, spatially relative terms such as "inside", "outside", "below", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that spatially relative terms may be intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figure is turned over, an element described as being "below" or "below" other elements or features will then be positioned as being "above" the other elements or features. Thus, the example term "below" can include both the orientations of above and below. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0051] First embodiment:

[0052] Figure 1 It is a schematic structural diagram of an implantable medical device provided in the first embodiment of the present invention. Figure 2 It is a partial schematic diagram of an implantable medical device provided in the first embodiment of the present invention. Fig. 9 1 is a schematic diagram of the three-dimensional structure of the ring body 13 of the first, second and third embodiments. In the figure, the outline of the ring body 13 is shown by dotted lines, and the dotted frame I and the dotted frame II are in two relatively parallel planes. The ring body 13 has a first end face and a second end face, and the first end face and the second end face are respectively located in the dotted frame I and the dotted frame II.

[0053] Reference Figure 1 , Figure 2 and Fig. 9 As shown, the implantable medical device includes a wireless charging coil 1, a main body 2, an antenna 3 and a top cover 6, the main body 2 includes a shell 21, and the shell 21 includes a metal side wall 221. The top cover 6 is buckled with the metal side wall 221 to form an accommodating space, and the wireless charging coil 1 and the antenna 3 are arranged together in the accommodating space, and in the same direction outside the shell 21. The metal side wall 221 is located on the side of the ring body 13, and the metal side wall 221 is simultaneously facing the ring body 13 and the antenna 3. A coupling gap 25 is formed between the metal side wall 221 and the ring body 13. In this embodiment, the positive projection area of ​​the ring body 13 on the metal side wall 221 is the coupling area 24, and the gap between the coupling area 24 and the ring body 13 serves as the coupling gap 25.

[0054] The wireless charging coil 1 includes a coil body 13, and the coil body 13 includes an inner winding 131, an outer winding 132, a first lead 11 and a second lead 12, and the first lead 11 and the second lead 12 are respectively connected to the inner winding 131 and the outer winding 132. Specifically, the wireless charging coil 1 in this embodiment includes a conductive wire, and the conductive wire includes two head areas and a middle area located between the head areas. The middle area is wound along a predetermined direction to form the coil body 13, and the two head areas extend from the coil body 13 and form the first lead 11 and the second lead 12, respectively. The coil body 13 has a plurality of turns, and the coil body 13 includes at least two layers of conductive wire from the inside to the outside. Among them, the inner winding 131 is formed by winding close to the inside of the coil body 13, and the outer winding 132 is formed by winding close to the outside of the coil body 13. The outer contour of the coil body 13 can be configured in a shape such as a runway or a rounded rectangle. Combined with Fig. 9 Preferably, the second lead 12 and the first lead 11 extend from both ends of the coil 13 in the axial direction toward the main body 2. That is, the first lead 11 extends from the area of ​​the first end surface close to the outside, and the second lead 12 extends from the area of ​​the second end surface close to the inside. Thus, the first lead 11 and the second lead 12 are prevented from being too close to each other and interfering with each other during the winding process of the coil 13. In some other embodiments, the position where the first lead 11 extends on the coil 13 may not be limited.

[0055] The shell 21 has a plurality of connection ports 222, and the implantable medical device further includes a plurality of feedthrough connectors 7. The plurality of feedthrough connectors 7 are arranged in one-to-one correspondence with the plurality of connection ports 222, and the feedthrough connectors 7 are sealed and installed at the connection ports 222. The feedthrough connector 7 includes a conductive pin (not shown in the figure) connected to the circuit board 22, and the antenna 3, the first lead 11 and the second lead 12 are respectively connected to the circuit board 22 through the conductive pins. In this embodiment, the plurality of connection ports 222 are opened on the metal side wall 221 of the shell 21. The feedthrough connector 7 also includes a feedthrough flange 71 and an insulating member 72. The feedthrough flange 71 is clamped in the connection port 222, and the insulating member 72 is clamped in the feedthrough flange 71 and has a through hole (not shown in the figure), and the conductive pin is passed through the through hole to connect with the circuit board 22 in the shell 21.

[0056] In this embodiment, the wireless charging coil 1 and the antenna 3 are relatively close to the housing 21, the operating frequency of the antenna 3 is between 2.4GHz and 2.48GHz, and the pins of the antenna 3 are close to the metal side wall 221 and have high-frequency coupling with the housing 21. At the edge of the coupling area 24, the coupling strength between the wireless charging coil 1 and the housing 21 is a little weaker, and the first lead 11 and the second lead 12 are connected to the circuit board 22 in the housing 21 near the edge of the coupling area 24. To a certain extent, the coupling between the metal side wall 221 and the wireless charging coil 1 is reduced, thereby reducing the coupling loss of the antenna 3 and ensuring the radiation efficiency of the antenna 3.

[0057] In this embodiment, an electrode connecting portion 23 is also provided in the top cover 6. The electrode connecting portion 23 has a plug-in channel 231, and the plug-in channel 231 has a socket 232. The stimulation electrode can be inserted into the plug-in channel 231 through the socket 232, thereby realizing the electrical connection between the stimulation electrode and the implantable medical device. The antenna 3 is arranged at one end of the plug-in channel 231 away from the socket 232, and the coil body 13 is located on the side of the plug-in channel 231. As a result, the arrangement of the wireless charging coil 1, the electrode connecting portion 23 and the antenna 3 in the top cover 6 is more compact, which contributes to the miniaturization design of the implantable medical device. Preferably, the shell 21 in the above embodiment is a metal shell, and the top cover 6 is made of non-metallic material. To ensure that the wireless charging coil 1 and the antenna 3 in the top cover 6 can communicate with external devices.

[0058] Second embodiment:

[0059] Figure 3 Schematic diagram of the structure of the implantable medical device provided by the second embodiment. Figure 4 It is a partial schematic diagram of the implantable medical device provided by the second embodiment.

[0060] The main difference between the second embodiment and the first embodiment is that the position of the first lead 11 connected to the inner winding 131 is changed, the first lead 11 is set in the outer area of ​​the coupling gap 25 and away from the antenna 3, and the first lead 11 is connected to the conductive pin of the feed-through connector 7 located on the outer side of the coupling area 24, thereby reducing the electromagnetic field formed by the high-frequency coupling between the metal side wall 221 and the antenna 3 and coupling to the side winding 131 of the inner antenna 3 through the first lead 11. The coupling strength between the wireless charging coil 1 and the metal side wall 221 is reduced, and the current of the antenna 3 coupled to the metal side wall 221 is also reduced, the coupling loss of the antenna 3 is reduced, and the radiation efficiency of the antenna 3 is guaranteed.

[0061] The first lead 11 includes a first extension section 111 and a second extension section 112 connected to each other, and the first extension section 111 is connected to the second extension section 112 and extends along the axial direction of the ring body 13. The second extension section 112 extends along the radial direction of the ring body 13, so that the first lead 11 extends to the outside of the ring body 13 through the second extension section 112, and then connects to the circuit board 22 in the shell 21. This form can optimize the magnetic field distribution of the charging coil, ensure the charging efficiency, and at the same time ensure the distance between the first extension section 111 and the second extension section 112 and the metal side wall 221, and minimize the coupling of the first lead 11 and the metal side wall 221. The first lead 11 also includes a third extension section 113, and the second extension section 112 is located between the third extension section 113 and the first extension section 111. The extension direction of the third extension section 113 is perpendicular to the metal side wall 221. As a result, the first lead 11 can approach the metal side wall 221 through the third extension section 113 and connect to the feed-through connector 7. At the same time, the extension direction of the third extension section 43 is perpendicular to the metal side wall 221 , which can reduce the coupling with the electromagnetic wave generated by the induced current conducted along the metal side wall 221 .

[0062] Third embodiment:

[0063] Figure 5 and Figure 6 It is a schematic diagram of the structure of an implantable medical device provided in the third embodiment. Figure 7 It is a partial schematic diagram of the implantable medical device provided in the third embodiment. Figure 8 It is a schematic structural diagram of the ring body 13 provided in the third embodiment. Figure 8 The contour of the inner winding 131 is shown with a thick solid line, and the contour of the outer winding 132 is shown with a thin solid line. At the same time, the edge positions of the first lead 11, the second lead 12 and the coupling area 24 close to the ring body 13 are shown with dotted lines, and the position of the coupling gap 25 is shown with a thick dotted line.

[0064] The difference between the third embodiment and the first embodiment is that the position of the first lead 11 connected to the inner winding 131 and the position of the second lead 12 connected to the outer winding 132 are changed, the first lead 11 and the second lead 12 are both located outside the coupling gap 25 and away from the antenna 3, the first lead 11 and the second lead 12 are connected to the conductive pins of the feed-through connector 7 located outside the coupling area 24, further reducing the coupling strength between the outer winding 132 and the metal side wall 211, and reducing the coupling loss of the antenna 3.

[0065] Reference Figure 5-8As shown, a circuit board 22 and a battery are arranged in the housing 21, and the wireless charging coil 1 can charge the battery. The coil body 13 is electrically connected to the circuit board 22 through the first lead 11 and the second lead 12 respectively through the feed-through connector 7. The first lead 11 has a first connection end 51 electrically connected to the circuit board 22, and the second lead 12 has a second connection end 52 electrically connected to the circuit board 22. The antenna 3 includes a third connection end 53, and the antenna 3 is electrically connected to the feed-through connector 7 through the third connection end 53. In the projection direction of the housing 21 of the wireless charging coil 1, the coil body 13 is spaced between the second connection end 52 and the third connection end 53, and the first connection end 51 is located on the side of the second connection end 52 away from the third connection end 53.

[0066] As shown in reference 8, the ring body 13 includes a first extension section 41, a second extension section 42 and two third extension sections 43 in the circumferential direction. The first extension section 41 is arranged between the second extension section 42 and the metal side wall 221, and the first extension section 41 and the second extension section 42 are connected by two third extension sections 43. The metal side wall 221 includes a coupling area 24 opposite to the ring body 13, which is the area where the positive projection of the first extension section 41 on the metal side wall 221 is located. The coupling area 24 is close to the ring body 13, and the coupling gap 25 is formed between the coupling area 24 and the ring body 13. The first extension section 41, the second extension section 42 and the metal side wall 221 are all extended along a straight line and are arranged relatively parallel. The metal side wall 221 is a rectangle or a rounded rectangle in the extension direction, and the extension direction of the first extension section 41 and the second extension section 42 is the same as the length direction of the metal side wall 221. The two third extension sections 43 are arranged in a curved manner. One end of the first lead 11 is connected to the inner winding 131 of the third extension section 43, and the other end extends toward the main body 2 and is electrically connected to the circuit board 22. In this embodiment, part of the first lead 11 extends from the inner side of the third extension section 43 away from the antenna 3 to the outer side, and the extension direction is perpendicular to the extension direction of the third extension section 43. The area of ​​the first lead 11 that crosses the third extension section 43 is arranged perpendicular to the extension of the third extension section 43, so that the first lead 11 can maintain a certain distance from the coupling area 24, thereby reducing the coupling strength between the first lead 11 and the metal side wall 221. The first lead 11 is coiled in the third extension section 43 so that the shape of the first lead 11 can be more stable, so as to facilitate connection with the circuit board 22 in the housing 21, and the first lead 11 is arranged away from the antenna 3, which can also avoid interference with the arrangement of the antenna 3.

[0067] The second lead 12 and the first lead 11 are connected to the same third extension section 43, and the antenna 3 is disposed adjacent to another third extension section 43, so that the first lead 11 and the second lead 12 are disposed on opposite sides of the coil body 13, staggered with the antenna 3. The conductive pins of the first lead 11 and the second lead 12 connected to the feed-through connector 7 are also located outside the coupling area 24, reducing the coupling strength between the wireless charging coil 1 and the metal side wall 211, and reducing the coupling loss of the antenna 3.

[0068] like Figure 8 As shown in the distance L1 in FIG. 1 , the distance L1 from the first extension section 41 to the metal side wall 221 is 0.5 mm to 6 mm. If the distance is too small, the coupling strength between the wireless charging coil 1 and the metal side wall 221 is very large. If the distance is too large, it is not conducive to the miniaturization of the implantable medical device. Therefore, by configuring the first lead 11 and the second lead 12, the radiation performance of the antenna 3 is met. In this form, the space occupied by the top cover 6 can be reduced to meet the miniaturization requirements of the implantable medical device.

[0069] Fig.10 It is a schematic diagram of the radiation efficiency simulation of the antennas of the first, second and third embodiments mentioned above. Curve A, curve B and curve C in the figure are the radiation efficiencies of the antennas corresponding to the first, second and third embodiments respectively. It can be seen from the figure that in the 2.4GHz-2.48GHz frequency band, the radiation efficiency of the first embodiment is much smaller than that of the second and third embodiments. Especially when approaching 2.5GHz, when the first connection end 51 and the second connection end 52 are staggered with the coupling region 24, the radiation efficiency of the third embodiment is close to 50%. Thereby, good communication performance between the antenna and the external device is guaranteed.

[0070] Fourth embodiment:

[0071] The present invention also provides an implantable neural stimulation system, comprising the above-mentioned implantable medical device and a stimulation electrode, wherein the implantable medical device can be electrically connected to the stimulation electrode to output a stimulation current through the stimulation electrode.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An implantable medical device, characterized in that: The implantable medical device comprises: Antenna (3); A wireless charging coil (1), comprising a coil body (13), a first lead wire (11) and a second lead wire (12), wherein the coil body (13) comprises an inner winding wire (131) and an outer winding wire (132), and the first lead wire (11) and the second lead wire (12) are respectively connected to the inner winding wire (131) and the outer winding wire (132); and A main body (2) comprising a shell (21) and a circuit board (22) arranged in the shell (21), the shell (21) comprising a metal side wall (221), the wireless charging coil (1) and the antenna (3) being arranged outside the shell (21), and the coil (13) being electrically connected to the circuit board (22) via the first lead (11) and the second lead (12); The metal side wall (221) is located on the side of the ring body (13) and faces the ring body (13) and the antenna (3), a coupling gap (25) is formed between the metal side wall (221) and the ring body (13), and the first lead (11) is arranged outside the coupling gap (25) and away from the antenna (3).

2. The implantable medical device according to claim 1, characterized in that: The ring body (13) comprises a first extension section (41), a second extension section (42) and two third extension sections (43) in the circumferential direction, the first extension section (41) being arranged between the second extension section (42) and the side edge of the metal side wall (221), and the first extension section (41) and the second extension section (42) being connected via the two third extension sections (43); One end of the first lead (11) is connected to the inner winding (131) of the third extension section (43), and the other end extends toward the main body (2) and is electrically connected to the circuit board (22).

3. The implantable medical device according to claim 2, characterized in that: Part of the first lead (11) extends from the inner side of the third extension section (43) away from the antenna (3) to the outer side, and the extension direction is perpendicular to the extension direction of the third extension section (43).

4. The implantable medical device according to claim 2, characterized in that: The second lead (12) is arranged outside the coupling gap (25) and away from the antenna (3); the second lead (12) and the first lead (11) are connected to the same third extension section (43); and the antenna (3) is arranged adjacent to another third extension section (43).

5. The implantable medical device according to claim 2, characterized in that: The distance from the first extension section (41) to the metal side wall (221) is 0.5 mm-6 mm.

6. The implantable medical device according to claim 1, characterized in that: The first lead wire (11) comprises a first extension section (111) and a second extension section (112) which are connected to each other, the first extension section (111) being connected to the inner winding wire (131) and extending along the axial direction of the ring body (13), and the second extension section (112) extending along the radial direction of the ring body (13).

7. The implantable medical device according to claim 1, characterized in that: The first lead (11) has a first connection end (51) electrically connected to the circuit board (22), the second lead (12) has a second connection end (52) electrically connected to the circuit board (22), the antenna (3) includes a third connection end (53), and the antenna (3) is arranged on the main body (2) and electrically connected to the circuit board (22) via the third connection end (53); In the projection direction of the shell (21), the coil body (13) of the wireless charging coil (1) is located between the second connection end (52) and the third connection end (53), and the first connection end (51) is located on a side of the second connection end (52) away from the third connection end (53).

8. The implantable medical device according to claim 1, characterized in that: The implantable medical device further comprises: The electrode connection portion (23) has a plug-in channel (231), and the plug-in channel (231) has a socket (232); A top cover (6) is arranged on one side of the shell (21); the electrode connecting portion (23), the wireless charging coil (1) and the antenna (3) are located inside the top cover (6); the antenna (3) is arranged at one end of the plug-in channel (231) away from the socket (232); and the coil body (13) is located on the side of the plug-in channel (231).

9. The implantable medical device according to claim 1, characterized in that: The housing (21) has a plurality of connection ports (222); The implantable medical device further comprises: A plurality of feed-through connectors (7) are sealed to connect the connection port (222); the feed-through connector (7) comprises a conductive pin connected to the circuit board (22); the antenna (3), the first lead (11) and the second lead (12) are respectively connected to the circuit board (22) via the conductive pin.

10. An implantable neural stimulation system, characterized in that: The implantable neural stimulation system comprises: An implantable medical device as claimed in any one of claims 1 to 9.

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