Capsule endoscopy

Abstract

The present invention relates to a capsule endoscope, comprising an outer shell and a capsule core arranged in the outer shell. The capsule core comprises a magnet unit, and the distance between the magnetic force center of the magnet unit and the center of gravity of the capsule endoscope is no greater than a threshold value, thereby ensuring the balance force inside and outside the capsule endoscope, improving the control accuracy of the capsule endoscope, and thereby improving work efficiency and reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a capsule endoscope. Background Art

[0002] With the development of capsule endoscopy technology, capsule endoscopy has gradually evolved from a passive type to an active and precisely controlled capsule endoscopy. Active and precise control of the capsule's movement is crucial for examining the human digestive tract, and the higher the control accuracy, the greater the significance for detecting positive lesions.

[0003] Magnetism is a non-contact force, making it an ideal means of controlling capsule motion. Consequently, magnetically controlled capsule endoscopy technology has rapidly advanced in recent years. While numerous patents for magnetically controlled capsule endoscopy have disclosed various approaches, control accuracy remains uncertain.

[0004] Because the forces acting on a magnetically controlled capsule in a magnetic field are the result of the external magnetic field acting on the magnet inside the capsule, the forces acting on the capsule endoscope during an examination include buoyancy, gravity, the support and friction of the digestive tract mucosa, and the magnetic force of the external magnetic field. Buoyancy, gravity, and magnetism are the most critical. Existing technical solutions all address gravity and buoyancy, but they still cannot precisely control the capsule endoscope.

[0005] In view of this, it is necessary to improve the existing capsule endoscope to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a capsule endoscope with low cost, high efficiency and high control accuracy.

[0007] In order to achieve the above-mentioned purpose of the invention, the present invention provides a capsule endoscope, including an outer shell and a capsule core arranged in the outer shell, wherein the capsule core includes a magnet unit, and the distance between the magnetic force center of the magnet unit and the center of gravity of the capsule endoscope is no greater than a threshold.

[0008] Furthermore, the capsule core further includes a battery unit, and the magnet unit is arranged adjacent to the battery unit.

[0009] Furthermore, the battery unit includes two batteries located on both sides of the magnet unit, and the two batteries are connected in series through a conductive component.

[0010] Furthermore, the magnet unit includes a conductive hole that penetrates the magnet unit in the axial direction, and the conductive component passes through the conductive hole to connect two batteries in series.

[0011] Furthermore, the conductive component is a conductive rod, and two ends of the conductive rod protrude axially from the conductive hole and respectively abut against two batteries.

[0012] Furthermore, the conductive component is a battery connecting piece, which includes a center piece located in the conductive hole, and electrical connecting pieces located at both ends of the center piece and protruding from the conductive hole to be electrically connected to the battery; the electrical connecting piece is located between the battery and the magnet unit.

[0013] Furthermore, the conductive hole has a diameter of 0.5 mm to 2 mm.

[0014] Furthermore, the conductive component extends along the outer surface of the magnet unit and connects the two batteries in series.

[0015] Furthermore, the conductive component is a metal coating wrapped around the outside of the magnet unit, and the two batteries are in electrical contact with the metal coating.

[0016] Furthermore, the capsule core further includes a magnet fixing member surrounding the two batteries and the magnet unit in a circumferential direction.

[0017] Furthermore, the magnet fixing member includes a boss protruding inward from its inner wall, and the inner diameter of the magnet fixing member at a position where the boss is not provided is not less than the outer diameter of the battery; the inner diameter of the boss is not less than the outer diameter of the magnet and is smaller than the outer diameter of the battery.

[0018] Furthermore, the magnet unit includes a receiving cavity that penetrates the magnet unit along the axial direction, and the battery unit is located in the receiving cavity.

[0019] Furthermore, the battery unit is bonded to the receiving cavity by glue.

[0020] Furthermore, the battery unit includes one battery; or the battery unit includes two batteries distributed along the axial direction, and a battery connecting piece connecting the two batteries in series, and the battery connecting piece is folded and placed between the two batteries.

[0021] Furthermore, the capsule core also includes a PCB board group, a flexible circuit board and a fixing structure connecting adjacent PCB boards, and functional elements fixed on the PCB boards; part of the PCB boards are located at one end of the magnet unit and the battery unit in the axial direction, and another part of the PCB boards are located at the other end of the magnet unit and the battery unit in the axial direction; and the battery unit is electrically connected to at least one of the PCB boards.

[0022] Furthermore, glue holes are provided on the connected fixed structures or the PCB boards, and the connection is reinforced by glue; and / or, positioning columns are provided on one of the adjacent fixed structures and the PCB boards, and positioning holes are provided on the other.

[0023] Compared with the prior art, the beneficial effect of the present invention is that the distance between the center of gravity of the capsule endoscope and the center of magnetic force is no greater than the threshold, which ensures the balance force inside and outside the capsule endoscope, improves the control accuracy of the capsule endoscope, and thus improves work efficiency and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a capsule endoscope according to an embodiment of the present invention;

[0025] Figure 2 is used for Figure 1 A schematic cross-sectional view of a magnet unit and a battery unit after assembly in the illustrated embodiment;

[0026] Figure 3 yes Figure 2 A schematic diagram of the cooperation between the magnet unit and the conductive rod in the embodiment shown;

[0027] Figure 4 is used for Figure 1 A cross-sectional schematic diagram of another magnet unit and a battery unit after assembly in the illustrated embodiment;

[0028] Figure 5 yes Figure 4 A schematic structural diagram of the magnet unit in the embodiment shown;

[0029] Figure 6 yes Figure 4 A schematic diagram of a state before the magnet unit and the battery unit are assembled in the embodiment shown;

[0030] Figure 7 is used for Figure 1 A cross-sectional schematic diagram of another magnet unit and a battery unit after assembly in the illustrated embodiment;

[0031] Figure 8 yes Figures 1 to 7 In any embodiment, a schematic diagram of the assembly of the electrode connecting piece and the negative electrode of the battery before the electrode connecting piece is bent;

[0032] Figure 9 yes Figures 1 to 7 In any embodiment, a schematic diagram of the electrode connecting piece and the positive electrode of the battery before the electrode connecting piece is bent;

[0033] Figure 10 yes Figure 1 Exploded diagram of the PCB assembly and fixed structure;

[0034] Figure 11 yes Figure 10 Schematic diagram of the structure in which the PCB board group is connected through the flexible circuit board;

[0035] Figure 12 yes Figure 1 Schematic diagram of the assembly of the central lighting panel fixings and the housing;

[0036] Figure 13 is a schematic structural diagram of a capsule endoscope according to another embodiment of the present invention;

[0037] Figure 14 yes Figure 13 Exploded diagram of the PCB assembly and fixed structure;

[0038] Figure 15 is a structural schematic diagram of a capsule endoscope according to another embodiment of the present invention;

[0039] Figure 16 is a structural schematic diagram of a capsule endoscope according to another embodiment of the present invention;

[0040] Figure 17 yes Figure 16 A schematic diagram of an assembly structure of the magnet unit and the battery unit;

[0041] Figure 18 yes Figure 16 A schematic diagram of another assembly structure of the magnet unit and the battery unit;

[0042] Figure 19 In (a), Figure 17 or a top view of 18, (b) is Figure 17 or 18's bottom view;

[0043] Figure 20 yes Figure 16 Exploded diagram of the PCB assembly and fixing structure.

[0044] Among them, 100-capsule endoscope; 1-housing, 11-main shell, 12-end cover, 13-fixing groove, 2-magnet unit, 21-conductive hole, 22-accommodating cavity, 3-battery unit, 31-battery, 32-electrode connecting piece, 33-recess, 34-insulating layer, 4-conductive component, 41-conductive rod, 42-battery connecting piece, 43-metal plating, 5-magnet fixing part, 51-boss, 6-PCB board assembly, 61-lighting board, 62-image acquisition and processing board, 63-power board, 64-antenna transceiver board, 67-through hole, 68-glue hole, 69-positioning column, 60-positioning hole, 7-flexible circuit board, 8-fixing structure, 81-lighting board fixing part, 811-holding wall, 812-holding frame, 813-fixing card, 814-mounting slot, 82-fixing part, 83-battery fixing part, 91-camera, 92-antenna DETAILED DESCRIPTION

[0045] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0046] In the various drawings of the present invention, for the sake of convenience, some sizes of structures or parts are exaggerated relative to other structures or parts, and thus, only the basic structure of the subject matter of the present invention is illustrated.

[0047] During their research, the inventors discovered that existing approaches to control accuracy based on gravity and buoyancy suffer from a serious problem: the center of the capsule's magnetic field force does not coincide with its center of gravity. Consequently, in some cases, while the forces acting on the capsule endoscope 100 are balanced, the misalignment between the center of gravity and the center of magnetic force causes torque on the capsule, degrading control accuracy.

[0048] like Figures 1 to 20 1 , which is a capsule endoscope 100 according to a preferred embodiment of the present invention, includes a shell 1 and a capsule core located in the shell 1 .

[0049] The shell 1 is biocompatible and will not be corroded by digestive fluid. The material of the shell 1 in the existing capsule endoscope 100 can be used, or another design can be used.

[0050] The shell 1 is formed by splicing at least two parts so as to fix the capsule core in the shell 1. Figure 1As shown, the housing 1 comprises a main housing 11 with both ends open, and two transparent end caps 12 respectively arranged at both ends of the main housing 11, which is suitable for a dual-lens capsule endoscope 100. The transparent end caps 12 and the main housing 11 are spliced ​​together along the axial direction of the capsule endoscope 100 to form the housing 1, and the two are connected together by adhesive or laser welding, which has good sealing performance. Alternatively, as Figure 13 、 Figure 15 and Figure 16 As shown, the housing 1 includes a main shell 11 with one end open and a transparent end cap 12 disposed at the open end of the main shell 11, which is suitable for a single-lens capsule endoscope 100. The connection method of the end cap 12 to the main shell 11 is the same as above and will not be repeated here.

[0051] Furthermore, a fixing groove 13 is provided at the connection between the end cover 12 and the main shell 11 to facilitate fixing the capsule core.

[0052] See also Figures 1 to 12 As shown, the capsule core includes all elements capable of realizing the functions of an endoscopic capsule, and is preferably an integrated structure to facilitate integral assembly with the shell 1 .

[0053] Specifically, the capsule core includes a magnet unit 2. The distance between the magnetic force center of the magnet unit 2 and the center of gravity of the capsule endoscope 100 is no greater than a threshold value. The threshold value is so small that the magnetic force center and the center of gravity of the capsule endoscope 100 are substantially aligned, and ideally, coincide with each other. This ensures balanced forces inside and outside the capsule endoscope 100, improves the control accuracy of the capsule endoscope 100, and thereby enhances work efficiency and reduces costs. In one specific embodiment, the threshold value is 5 mm.

[0054] The magnet unit 2 is usually of regular shape, so the center of the magnet unit 2 is substantially consistent with the center of magnetic force.

[0055] Furthermore, the capsule core also includes a battery unit 3, and the magnet unit 2 is disposed adjacent to the battery unit 3. The battery unit 3 and the magnet unit 2 are the most massive components in the capsule endoscope 100, and the weight of other components accounts for a very small proportion. Therefore, by arranging the battery unit 3 and the magnet unit 2 adjacent to each other, the center of gravity of the battery unit 3 and the magnet unit 2 can be understood as the center of gravity of the capsule endoscope 100, thereby greatly reducing the difference between the magnetic force center and the center of gravity of the capsule endoscope 100 to within a threshold range.

[0056] The assembly forms of the magnet unit 2 and the battery unit 3 include but are not limited to the following:

[0057] See also Figures 1 to 9As shown, the battery unit 3 includes two batteries 31 located on both sides of the magnet unit 2, and the two batteries 31 are connected in series through a conductive component 4; at this time, the common center of gravity of the battery unit 3 and the magnet unit 2 coincides with the magnetic force center of the magnet unit 2.

[0058] Further, see Figures 2 to 6 As shown, the magnet unit 2 includes a conductive hole 21 that passes through the magnet unit 2 in the axial direction, and the conductive component 4 passes through the conductive hole 21 to connect the two batteries 31 in series. Preferably, the conductive hole 21 is located at the center of the magnet unit 2 to prevent the conductive component 4 from causing the common center of gravity of the battery unit 3 and the magnet unit 2 to deviate from the magnetic force center of the magnet unit 2.

[0059] Generally, the center of the magnet unit 2 is punched according to the size of the magnet unit 2, and the magnetic performance loss is within 1%, which can be ignored. For example, the hole diameter of the conductive hole 21 is 0.5mm to 2mm, which has a small magnetic performance loss on the magnet unit 2 and can be ignored.

[0060] In a specific embodiment, please refer to Figures 2 and 3 As shown, the conductive component 4 is a conductive rod 41. Both ends of the conductive rod 41 protrude axially from the conductive hole 21 and abut against the electrodes of the two batteries 31, resulting in minimal resistance increase. The conductive rod 41 can be a tweezers rod, an aluminum rod, or a copper rod. For example, using a 1mm diameter copper rod to connect two batteries 31 results in a negligible resistance increase of no more than 0.00012Ω.

[0061] In another specific embodiment, please refer to Figures 4 to 6 As shown, the conductive component 4 is a battery connector 42. The battery connector 42 includes a center piece located within the conductive hole 21 and electrical connectors located at both ends of the center piece and protruding from the conductive hole 21 to electrically connect to the battery 31. The electrical connectors are folded and located between the battery 31 and the magnet unit 2. The battery connector 42 can be an electrode connector 32 or other electrical connector.

[0062] At this time, the conductive hole 21 is a flat gap, and its size matches the width and thickness of the battery connecting piece 42. The connecting piece and the battery 31 are spot-welded and riveted toward the positive or negative pole of the magnet unit 2, and then the connecting piece is fixed according to the Figure 6 The L1 and L2 axisymmetric lines in the folded Figure 4 The structure shown is located between the battery 31 and the magnet unit 2. And because the battery connecting piece 42 is used for connection, the resistance added to the battery unit 3 can be ignored.

[0063] Alternatively, see Figure 7As shown, the conductive component 4 extends along the outer surface of the magnet unit 2 and connects the two batteries 31 in series. In this case, the conductive component 4 can be of any structure. Preferably, the conductive component 4 is a metal coating 43 covering the exterior of the magnet unit 2. The two batteries 31 are in direct electrical contact with the metal coating 43, ensuring an effective and stable electrical connection.

[0064] The metal coating 43 can be nickel-plated or a nickel / copper / nickel composite coating. The thickness of the metal coating 43 is 0.005 mm to 0.01 mm and can be deposited by electroplating or vacuum vapor deposition. The added resistance of the metal coating 43 to the battery cell 3 is negligible.

[0065] Also, see Figures 2 to 7 As shown, the capsule core also includes a magnet fixing part 5 that surrounds the two batteries 31 and the magnet unit 2 in the circumferential direction. The difference between the total axial height of the battery unit 3 and the magnet unit 2 and the axial length of the magnet fixing part 5 does not exceed 0.1 mm, which can effectively fix the battery unit 3 and the magnet unit 2.

[0066] Furthermore, the magnet fixing member 5 includes a boss 51 extending inward from its inner wall. The inner diameter of the boss 51 is no less than the outer diameter of the magnet and smaller than the outer diameter of the battery 31. The inner diameter of the magnet fixing member 5 at the position where the boss 51 is not provided is no less than the outer diameter of the battery 31. The magnet unit 2 is located inside the boss 51, and the two batteries 31 are located on either side of the magnet unit 2 along the axial direction.

[0067] The boss 51 is annular and can be a continuous structure or a discontinuous structure, both of which can effectively fix the magnet unit 2 .

[0068] Preferably, the boss 51 is arranged at the middle position of the magnet fixing part 5 along the axial direction, and the difference between the axial length of the boss 51 and the thickness of the magnet unit 2 is not greater than 0.1 mm, which can effectively fix the magnet unit 2; the two batteries 31 are respectively located on both sides of the magnet unit 2 along the axial direction.

[0069] In addition, UV glue, epoxy glue or other glue is used to cure the gaps between the magnet fixing member 5 and the battery unit 3 and the magnet unit 2 to fix the three as a whole and ensure good electrical contact.

[0070] In an embodiment without the magnet fixing member 5 , the two batteries 31 and the magnet unit 2 may be bonded together into a whole by glue.

[0071] Further, see Figure 1 、 Figure 10 and Figure 11As shown, the capsule core further includes a PCB (Printed Circuit Board) group 6, which includes a plurality of PCBs connected and spaced apart via a flexible circuit board 7. The capsule core also includes a fixing structure 8 connecting adjacent PCBs and functional components fixed to the PCBs.

[0072] Part of the PCB board is located at one end of the magnet unit 2 and the battery unit 3 along the axial direction, and another part of the PCB board is located at the other end of the magnet unit 2 and the battery unit 3 along the axial direction; so that the center of gravity of the battery unit 3 and the magnet unit 2 is almost consistent with the center of gravity of the capsule endoscope 100. In addition, the battery unit 3 is electrically connected to at least one PCB board adjacent to it. Specifically, as Figure 1 、 Figure 2 、 Figure 4 and Figure 7 As shown, the positive and negative electrodes of the battery cell 3 are anchored by welding with electrode connectors 32. The ends of the electrode connectors 32 are provided with recesses 33. Correspondingly, a recess is provided on the PCB. The recesses 33 of the electrode connectors 32 and the recesses on the PCB are securely fastened together by soldering, thereby supplying power to the PCB. Furthermore, an insulating layer 34 is provided between the battery 31 and the non-welded portion of the electrode connectors 32 to prevent leakage or short circuits.

[0073] See also Figure 1 and Figure 10 As shown, the fixing structure 8 connects the plurality of PCB boards into a whole, and one fixing structure 8 extends into the fixing groove 13 and is fixed to the shell 1 by curing the glue, thereby achieving the fixation of the capsule core and the shell 1.

[0074] Furthermore, glue holes 68 are provided on the connected fixing structure 8 or the PCB board, and the connection is reinforced by glue.

[0075] Furthermore, a positioning column 69 is provided on one of the adjacent fixing structure 8 and the PCB board, and a positioning hole 60 is provided on the other one, so as to achieve precise assembly and prevent the two from being displaced in the circumferential direction.

[0076] The functional unit is the core component of the capsule core, including but not limited to a camera unit, an antenna 92, a control unit, and the like.

[0077] See also Figure 1 、 Figure 10 and Figure 11As shown, in the dual-camera capsule endoscope 100, the PCB board group 6 includes an illumination board 61, an image acquisition and processing board 62, a power supply board 63, an antenna transceiver board 64, an image acquisition and processing board 62, and an illumination board 61, which are sequentially distributed along the axial direction and connected in pairs by a flexible circuit board 7. Adjacent PCB boards are fixedly connected by a fixing structure 8 to form a whole. The functional unit includes an illumination lamp located on the illumination board 61, a camera 91 located on the image acquisition and processing board 62, and an antenna 92 ​​connected to the antenna transceiver board 64. The illumination board 61 has a through hole 67 for exposing the camera 91 to the outside. The battery unit 3 and the magnet unit 2 are located between the power supply board 63 and the antenna transceiver board 64, and the battery unit 3 is electrically connected to the power supply board 63 and the antenna transceiver board 64.

[0078] In this embodiment, the fixing structure 8 includes a lighting board fixing member 81 for fixing the lighting board 61, a fixing member 82 connecting the image acquisition and processing board 62 and the power board 63, a fixing member 82 connecting the antenna transceiver board 64 and the image acquisition and processing board 62, and a magnet fixing member 5. The structure of the lighting board fixing member 81 is not limited. Its edge extends into the fixing groove 13 and is glued to fix the capsule core within the housing 1.

[0079] The lighting board fixing part 81 includes an annular retaining wall 811, a retaining frame 812 protruding outward from the front end of part of the retaining wall 811 to be accommodated in the fixing groove 13, a plurality of fixing clips 813 protruding inward from the retaining wall 811 to fix and limit the lighting board 61, and a notch portion provided on the retaining wall 811 for the flexible circuit board 7 to pass through. The retaining wall 811 is surrounded by a mounting groove 814.

[0080] The fixing members 813 include two sets of fixing members 813 spaced apart in the front-to-back direction to retain the lighting board 61. The front set of fixing members 813 includes a plurality of spaced-apart clips, while the rear set of fixing members 813 includes a strip extending along the retaining wall 811. Preferably, the clips and the strip are installed offset from each other. The lighting board 61 is received in the mounting slot 814 and retained between the two sets of fixing members 813. The flexible circuit board 7 connected to the lighting board 61 extends through the notch to connect to the image acquisition and processing board 62.

[0081] The side of the retaining wall 811 facing away from the end cap 12 is provided with positioning posts 69 and / or positioning holes 60; the image acquisition and processing board 62 is provided with matching positioning holes 60 and / or positioning posts 69. The image acquisition and processing board 62 is secured to the retaining wall 811 via the positioning posts 69 and positioning holes 60, preventing circumferential rotation. Preferably, the side of the retaining wall 811 facing away from the end cap 12 is also provided with glue holes 68 to enhance the stability of the connection between the two.

[0082] See also Figures 13 and 14 As shown, in the single-camera capsule endoscope 100, the PCB board group 6 includes an illumination board 61, an image acquisition and processing board 62, a power supply board 63, and an antenna transceiver board 64, which are sequentially distributed along the axial direction and connected in pairs by a flexible circuit board 7, and adjacent PCB boards are fixedly connected to form a whole by a fixing structure 8. The functional unit includes an illumination lamp located on the illumination board 61, a camera 91 located on the image acquisition and processing board 62, and an antenna 92 ​​connected to the antenna transceiver board 64. The illumination board 61 has a through hole 67 for exposing the camera 91 to the outside; the battery unit 3 and the magnet unit 2 are fixed between the power supply board 63 and the antenna transceiver board 64 by the magnet fixing member 5, and the battery unit 3 is electrically connected to the power supply board 63.

[0083] In this embodiment, the fixing structure 8 includes a lighting board fixing member 81 for fixing the lighting board 61, a fixing member 82 for connecting the image acquisition and processing board 62 and the power board 63, and a magnet fixing member 5. The structure and fixing method of the lighting board fixing member 81 are the same as those in the above embodiment and will not be repeated here.

[0084] See also Figure 15 As shown, Figure 13 and Figure 14 The only difference is that the magnet fixing member 5 is not provided, and the battery unit 3 and the magnet unit 2 are fixed between the power board 63 and the antenna transceiver board 64 by the battery fixing members 83 located on both sides. Figures 4 to 6 The battery unit 3 and the magnet unit 2 shown, and the two batteries 31 are fixed by welding, and the holding force is strong.

[0085] See also Figures 16 to 20 The embodiment shown, with Figure 15 The difference between the illustrated embodiments lies only in the way the magnet unit 2 and the battery unit 3 are assembled.

[0086] In this embodiment, the magnet unit 2 includes a receiving cavity 22 that axially penetrates the magnet unit 2, and the battery unit 3 is located in the receiving cavity 22. Furthermore, the battery unit 3 is bonded to the receiving cavity 22 by glue.

[0087] Specifically, the battery unit 3 may be one battery 31 , or the battery unit 3 may include two batteries 31 distributed along the axial direction and a battery connecting piece 42 connecting the two batteries 31 in series, wherein the battery connecting piece 42 is folded and placed between the two batteries 31 .

[0088] In addition, all the combinations of the battery unit 3 and the magnet unit 2 of the present invention can be used in a capsule endoscope 100 with a single camera or a capsule endoscope 100 with a dual camera.

[0089] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0090] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A capsule endoscope, comprising a shell and a capsule core disposed in the shell, wherein the capsule core comprises a magnet unit, characterized in that: The distance between the magnetic force center of the magnet unit and the center of gravity of the capsule endoscope is not greater than a threshold value; The capsule core further includes a battery unit, and the magnet unit is disposed adjacent to the battery unit; The battery unit includes two batteries located on both sides of the magnet unit, and the two batteries are connected in series through a conductive component; The magnet unit includes a conductive hole that penetrates the magnet unit in an axial direction, and the conductive component passes through the conductive hole to connect two batteries in series.

2. The capsule endoscope according to claim 1, characterized in that The conductive component is a conductive rod, and two ends of the conductive rod protrude axially from the conductive hole and respectively abut against two batteries.

3. The capsule endoscope according to claim 1, wherein The conductive component is a battery connecting piece, which includes a center piece located in the conductive hole, and electrical connecting pieces located at both ends of the center piece and protruding from the conductive hole to be electrically connected to the battery; the electrical connecting piece is located between the battery and the magnet unit.

4. The capsule endoscope according to claim 1, wherein The conductive holes have a diameter of 0.5 mm to 2 mm.

5. The capsule endoscope according to claim 1, characterized in that The capsule core further includes a magnet fixing member surrounding the two batteries and the magnet unit in a circumferential direction.

6. The capsule endoscope according to claim 5, characterized in that The magnet fixing part includes a boss protruding inward from its inner wall, and the inner diameter of the magnet fixing part where the boss is not provided is not less than the outer diameter of the battery; the inner diameter of the boss is not less than the outer diameter of the magnet and is smaller than the outer diameter of the battery.

7. The capsule endoscope according to claim 1, characterized in that The magnet unit includes a receiving cavity which penetrates the magnet unit in the axial direction, and the battery unit is located in the receiving cavity.

8. The capsule endoscope according to claim 7, characterized in that The battery unit is bonded to the receiving cavity by glue.

9. The capsule endoscope according to claim 7, characterized in that The battery unit includes two batteries distributed along the axial direction and a battery connecting piece for connecting the two batteries in series. The battery connecting piece is folded and placed between the two batteries.

10. The capsule endoscope according to any one of claims 1 to 9, characterized in that: The capsule core also includes a PCB board group, a flexible circuit board and a fixing structure connecting adjacent PCB boards, and functional elements fixed on the PCB boards; part of the PCB boards are located at one end of the magnet unit and the battery unit in the axial direction, and another part of the PCB boards are located at the other end of the magnet unit and the battery unit in the axial direction; and the battery unit is electrically connected to at least one of the PCB boards.

11. The capsule endoscope according to claim 10, characterized in that Glue dispensing holes are provided on the connected fixing structures or the PCB boards, and the connection is reinforced by glue dispensing; and / or, a positioning column is provided on one of the adjacent fixing structures and the PCB boards, and a positioning hole is provided on the other.

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