CN212755582U - Capsule endoscope - Google Patents

Abstract

The utility model relates to a capsule endoscope, including shell and the capsule core of setting in the shell, the capsule core includes the magnet unit, the magnetic force atress center of magnet unit with distance between the focus of capsule endoscope is not more than the threshold value, has guaranteed the inside and outside equilibrant of capsule endoscope, has improved capsule endoscope's control accuracy, and then improves work efficiency, reduce cost.

Description

Capsule endoscope

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a capsule endoscope.

Background

With the development of capsule endoscope technology, the capsule endoscope is gradually developed from a passive capsule endoscope into a capsule endoscope capable of being actively and accurately controlled. In the process of examining the digestive tract of a human body, the active and accurate control of the motion of the capsule is important, and the higher the control accuracy is, the greater the detection significance of the positive focus is.

Magnetic force is a non-contact force and is an ideal means for controlling the motion of the capsule. Therefore, the development of the magnetron capsule endoscope technology is faster and faster in recent years. Although many patents to magnetically controlled capsule endoscopes disclose many solutions, the problem of control accuracy is still not guaranteed.

As the stress of the magnetic control capsule in the magnetic field is derived from the result that the magnet inside the capsule is acted by the external magnetic field, the capsule endoscope is acted by the buoyancy, the gravity, the supporting force and the friction force of the alimentary tract mucous membrane and the magnetic force of the external magnetic field in the process of examination, wherein the most important are the buoyancy, the gravity and the magnetic force. The disclosed solutions start from the perspective of gravity and buoyancy, but the capsule endoscope is still not controlled very precisely.

In view of the above, there is a need for an improved capsule endoscope to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a capsule endoscope with low costs, efficient and control accuracy is high.

In order to realize the above utility model purpose, the utility model provides a capsule endoscope, including shell and the capsule core of setting in the shell, the capsule core includes the magnet unit, the magnetic force atress center of magnet unit with distance between the focus of capsule endoscope is not more than the threshold value.

Further, the capsule core further comprises a battery unit, and the magnet unit is arranged adjacent to the battery unit.

Further, the battery unit comprises two batteries respectively positioned at two sides of the magnet unit, and the two batteries are connected in series through a conductive component.

Further, the magnet unit includes a conductive hole penetrating the magnet unit in an axial direction, and the conductive member connects two batteries in series through the conductive hole.

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

Furthermore, the conductive part is a battery connecting sheet which comprises a central sheet positioned in the conductive hole and electric connecting sheets positioned at two ends of the central sheet and protruding out of the conductive hole to be electrically connected with the battery; the electrical connection piece is located between the battery and the magnet unit.

Furthermore, the aperture of the conductive hole is 0.5 mm-2 mm.

Further, the conductive member extends along an outer surface of the magnet unit and connects two of the batteries in series.

Further, the conductive part is a metal plating layer coated outside the magnet unit, and the two batteries are in electrical contact with the metal plating layer.

Further, the capsule core further includes a magnet fixing member surrounding the two batteries and the magnet unit in a circumferential direction.

Further, the magnet fixing piece comprises a boss protruding inwards from the inner wall of the magnet fixing piece, and the inner diameter of the magnet fixing piece at the position where the boss is not arranged is not smaller than the outer diameter of the battery; the inner diameter of the boss is not smaller than the outer diameter of the magnet and smaller than the outer diameter of the battery.

Further, the magnet unit comprises an accommodating cavity penetrating through the magnet unit along the axial direction, and the battery unit is located in the accommodating cavity.

Further, the battery unit is adhered to the accommodating cavity through glue.

Further, the battery unit includes a battery; or the battery unit comprises two batteries distributed along the axial direction and a battery connecting piece connected with the two batteries in series, and the battery connecting piece is arranged between the two batteries in a folded shape.

Furthermore, the capsule core also comprises a PCB board group, a flexible circuit board and a fixing structure which are connected with adjacent PCB boards, and functional elements fixed on the PCB boards; part of the PCB is positioned at one end of the magnet unit and the battery unit along the axial direction, and the other part of the PCB is positioned at the other end of the magnet unit and the battery unit along the axial direction; and the battery unit is electrically connected with at least one of the PCB boards.

Furthermore, glue dispensing holes are formed in the connected fixing structures or the PCB and are connected through glue dispensing and reinforcing; and/or one of the adjacent fixing structure and the PCB is provided with a positioning column, and the other one is provided with a positioning hole.

Compared with the prior art, the beneficial effects of the utility model reside in that: the distance between the gravity center of the capsule endoscope and the magnetic force center is not greater than a threshold value, so that the balance force inside and outside the capsule endoscope is ensured, the control precision of the capsule endoscope is improved, the working efficiency is improved, and the cost is reduced.

Drawings

FIG. 1 is a schematic view of a capsule endoscope according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a magnet unit and battery unit assembled for use in the embodiment of FIG. 1;

FIG. 3 is a schematic view of the magnet unit and the collector bar of the embodiment of FIG. 2;

FIG. 4 is a schematic cross-sectional view of another magnet unit used in the embodiment of FIG. 1, assembled with a battery unit;

FIG. 5 is a schematic view of the structure of the magnet unit in the embodiment shown in FIG. 4;

FIG. 6 is a schematic view showing a state before the magnet unit and the battery unit are assembled in the embodiment of FIG. 4;

FIG. 7 is a schematic cross-sectional view of another magnet unit used in the embodiment of FIG. 1 assembled with a battery unit;

FIG. 8 is a schematic view of the assembly of the electrode tab with the negative electrode of the battery in any of the embodiments of FIGS. 1-7, prior to the electrode tab being bent;

FIG. 9 is a schematic view of the electrode tab and the positive electrode of the battery of any of the embodiments of FIGS. 1-7, shown without bending the electrode tab;

FIG. 10 is an exploded view of the PCB assembly and mounting structure of FIG. 1;

FIG. 11 is a schematic diagram of the PCB assembly of FIG. 10 connected by a flexible circuit board;

FIG. 12 is a schematic view of the assembly of the lighting panel mount and housing of FIG. 1;

FIG. 13 is a schematic structural view of a capsule endoscope according to another embodiment of the present invention;

FIG. 14 is an exploded view of the PCB assembly and mounting structure of FIG. 13;

FIG. 15 is a schematic structural view of a capsule endoscope according to another embodiment of the present invention;

FIG. 16 is a schematic structural view of a capsule endoscope according to another embodiment of the present invention;

FIG. 17 is a schematic view showing an assembled structure of the magnet unit and the battery unit in FIG. 16;

FIG. 18 is a schematic view showing another assembled structure of the magnet unit and the battery unit in FIG. 16;

fig. 19, (a) is a top view of fig. 17 or 18, and (b) is a bottom view of fig. 17 or 18;

fig. 20 is an exploded view of the PCB board assembly and mounting structure of fig. 16.

Wherein, 100-capsule endoscope; 1-housing, 11-main housing, 12-end cap, 13-fixing groove, 2-magnet unit, 21-conductive hole, 22-receiving cavity, 3-battery unit, 31-battery, 32-electrode connecting piece, 33-recess, 34-insulating layer, 4-conductive part, 41-conductive bar, 42-battery connecting piece, 43-metal plating, 5-magnet fixing piece, 51-boss, 6-PCB group, 61-lighting board, 62-image collecting processing board, 63-power supply board, 64-antenna receiving and transmitting board, 67-through hole, 68-dispensing hole, 69-positioning column, 60-positioning hole, 7-flexible circuit board, 8-fixing structure, 81-lighting board fixing piece, 811-fixing wall, 812-holding rack, 813-fixing clamping piece, 814-mounting groove, 82-fixing piece, 83-battery fixing piece, 91-camera and 92-antenna

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all included in the scope of the present invention.

In the various drawings of the present invention, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for ease of illustration, and thus, are used only to illustrate the basic structure of the subject matter of the present invention.

The inventor finds in research that the problem of control accuracy in the prior art from the perspective of gravity and buoyancy is a serious problem, namely that the center of the capsule acted by the magnetic field force is not coincident with the gravity center of the capsule. Therefore, although the capsule endoscope 100 is balanced in force, the capsule receives a torque due to misalignment of the center of gravity and the center of force of the magnetic force, and thus the control accuracy is deteriorated.

As shown in fig. 1 to 20, a capsule endoscope 100 according to a preferred embodiment of the present invention includes a housing 1 and a capsule core located in the housing 1.

The housing 1 is biocompatible and not corroded by digestive juice, and the material of the housing 1 in the existing capsule endoscope 100 can be used or can be designed additionally.

The shell 1 is formed by splicing at least two parts so as to fix the capsule core in the shell 1. For example, as shown in fig. 1, the housing 1 includes a main casing 11 having both open ends, and two transparent end caps 12 respectively disposed at both ends of the main casing 11, and is suitable for a dual-lens capsule endoscope 100. The transparent end cover 12 and the main shell 11 are spliced along the axial direction of the capsule endoscope 100 to form the outer shell 1, the outer shell and the outer shell are connected together by adopting viscose glue or laser welding, and the sealing performance is good. Alternatively, as shown in fig. 13, 15 and 16, the housing 1 includes a main casing 11 having an open end, and a transparent end cap 12 disposed at the open end of the main casing 11, and is suitable for a single-lens capsule endoscope 100. The connection between the end cap 12 and the main housing 11 is the same as above, and will not be described herein.

Further, the joint of the end cap 12 and the main shell 11 has a fixing groove 13 for fixing the capsule core.

Referring to fig. 1 to 12, the capsule core comprises all the elements that can perform the function of an endoscopic capsule, preferably in a one-piece structure, facilitating the integral assembly with the casing 1.

Specifically, the capsule core comprises a magnet unit 2, the distance between the magnetic force center of the magnet unit 2 and the gravity center of the capsule endoscope 100 is not greater than a threshold value, the threshold value is small, the distance is as small as the magnetic force center is basically consistent with the gravity center of the capsule endoscope 100, the ideal state is a superposition state, the balance force inside and outside the capsule endoscope 100 can be ensured, the control precision of the capsule endoscope 100 is improved, and further the working efficiency and the cost are improved. In one embodiment, the threshold is 5 mm.

The magnet unit 2 is generally regular in shape, so that the center of the magnet unit 2 substantially coincides with the center of force of magnetic force.

Further, the capsule core also comprises a battery unit 3, and the magnet unit 2 is arranged adjacent to the battery unit 3. The battery unit 3 and the magnet unit 2 are the components with the largest mass in the capsule endoscope 100, and the weight ratio of other components is very small, so that after the battery unit 3 and the magnet unit 2 are adjacently arranged, the gravity centers of the two components can be understood as the gravity center of the capsule endoscope 100, and the difference between the magnetic force stress center and the gravity center of the capsule endoscope 100 is greatly reduced to be within a threshold value range.

The assembly form of the magnet unit 2 and the battery unit 3 includes but is not limited to the following:

referring to fig. 1 to 9, the battery unit 3 includes two batteries 31 respectively disposed at two sides of the magnet unit 2, and the two batteries 31 are connected in series through the conductive member 4; at this time, the common gravity center of the battery unit 3 and the magnet unit 2 coincides with the magnetic force center of the magnet unit 2.

Further, referring to fig. 2 to 6, the magnet unit 2 includes a conductive hole 21 penetrating the magnet unit 2 along an axial direction, and the conductive member 4 is connected in series with two batteries 31 through the conductive hole 21. Preferably, the conductive hole 21 is located at the center of the magnet unit 2, so as to avoid the conductive member 4 from causing the center of gravity of the battery unit 3 and the magnet unit 2 to deviate from the center of the magnetic force of the magnet unit 2.

In general, the center of the magnet unit 2 is perforated according to the size of the magnet unit 2, and the magnetic performance loss is within 1 percent and can be ignored. For example, the diameter of the conductive hole 21 is 0.5mm to 2mm, and the loss of the magnetic performance of the magnet unit 2 is small and negligible.

In an embodiment, referring to fig. 2 to 3, the conductive component 4 is a conductive rod 41, two ends of the conductive rod 41 axially protrude from the conductive hole 21 and respectively abut against the electrodes of the two batteries 31, and the increase of the resistance is small. The conductive rod 41 can be a tweezer rod, an aluminum rod or a copper rod; for example, by connecting two cells 31 with a 1mm diameter copper rod, the increase in resistance is no greater than 0.00012 Ω, which is negligible.

In another embodiment, referring to fig. 4-6, the conductive member 4 is a battery tab 42. The battery connecting piece 42 comprises a central piece positioned in the conductive hole 21, and electric connecting pieces which are positioned at two ends of the central piece and protrude out of the conductive hole 21 to be electrically connected with the battery 31; the electrical connection sheet is folded between the battery 31 and the magnet unit 2. The battery connection tab 42 may be the electrode connection tab 32, or may be another electrical connection.

In this case, the conductive hole 21 is a flat slit having a size that matches the width and thickness of the battery connecting tab 42. The electrical connection piece and the battery 31 are fixed by spot welding, riveting and anchoring towards the positive pole or the negative pole of the magnet unit 2, and then the electrical connection piece is folded according to the axial symmetry lines of L1 and L2 in figure 6, and the structure shown in figure 4 is formed after the electrical connection piece is folded and is positioned between the battery 31 and the magnet unit 2. And because of the connection using the battery connection tab 42, the resistance added to the battery cell 3 is negligible.

Alternatively, referring to fig. 7, the conductive member 4 extends along the outer surface of the magnet unit 2 and connects two batteries 31 in series; at this time, the conductive member 4 may have any structure. Preferably, the conductive member 4 is a metal plating layer 43 covering the exterior of the magnet unit 2, and the two batteries 31 are directly in electrical contact with the metal plating layer 43, so as to ensure effective and stable electrical connection.

The metal plating layer 43 may be a nickel plating layer, or a nickel/copper/nickel composite plating layer. The thickness of the metal coating 43 is 0.005 mm-0.01 mm, and electroplating or vacuum vapor deposition coating can be adopted. The metal plating 43 also adds negligible resistance to the battery cell 3.

In addition, as shown in fig. 2 to 7, the capsule core further includes a magnet fixing member 5 surrounding the two batteries 31 and the magnet unit 2 in the circumferential direction, and a difference between a total height of the battery unit 3 and the magnet unit 2 in the axial direction and a length of the magnet fixing member 5 in the axial direction is not more than 0.1mm, so that the battery unit 3 and the magnet unit 2 can be effectively fixed.

Further, the magnet fixing member 5 includes a boss 51 protruding inward from an inner wall thereof, an inner diameter of the boss 51 is not smaller than an outer diameter of the magnet and smaller than an outer diameter of the battery 31, and an inner diameter of the magnet fixing member 5 at a position where the boss 51 is not provided is not smaller than the outer diameter of the battery 31. The magnet unit 2 is located inside the boss 51, and the two batteries 31 are respectively located on two sides of the magnet unit 2 along the axial direction.

The boss 51 is annular, has a continuous structure or an intermittent structure, and can effectively fix the magnet unit 2.

Preferably, the boss 51 is arranged at the middle position of the magnet fixing piece 5 along the axial direction, and the difference between the length of the boss 51 along the axial direction and the thickness of the magnet unit 2 is not more than 0.1mm, so that the magnet unit 2 can be effectively fixed; the two batteries 31 are respectively located on both sides of the magnet unit 2 in the axial direction.

In addition, the gaps among the magnet fixing piece 5, the battery unit 3 and the magnet unit 2 are solidified by glue such as UV glue, epoxy glue and the like, and the three are fixed into a whole, so that good electric contact is ensured.

In the embodiment without the magnet fixing member 5, the two batteries 31 and the magnet unit 2 may be adhered together by glue to form a single body.

Further, referring to fig. 1, 10 and 11, the capsule core further includes a PCB (Printed Circuit Board) group 6, and the PCB group 6 includes a plurality of PCB boards connected and spaced by a flexible Circuit Board 7. The capsule core further comprises a fixing structure 8 for connecting adjacent PCB boards and functional elements fixed on the PCB boards.

Part of the PCB is positioned at one end of the magnet unit 2 and the battery unit 3 along the axial direction, and the other part of the PCB is positioned 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 almost coincides with the center of gravity of the capsule endoscope 100. And, the battery unit 3 is electrically connected to at least one PCB adjacent thereto. Specifically, as shown in fig. 1, 2, 4 and 7, the positive and negative electrodes of the battery unit 3 are provided with electrode connecting sheets 32 anchored by an electric welding process, and the ends of the electrode connecting sheets 32 are provided with recesses 33; correspondingly, a notch is arranged on the PCB; the recess 33 of the electrode connecting piece 32 is fixedly fitted with the notch of the PCB by soldering, thereby supplying power to the PCB. And an insulating layer 34 is further provided between the battery 31 and the non-welded portion of the electrode connecting tab 32 to prevent leakage or short circuit.

Referring to fig. 1 and 10, the fixing structures 8 connect a plurality of PCB boards into a whole, and one fixing structure 8 extends into the fixing groove 13 and is fixed to the housing 1 through glue curing, so as to fix the capsule core and the housing 1.

Further, glue dispensing holes 68 are formed in the connected fixing structures 8 or the connected PCB boards, and the connection is reinforced through glue dispensing.

Furthermore, a positioning column 69 is arranged on one of the adjacent fixing structure 8 and the PCB, and a positioning hole 60 is arranged on the other fixing structure, so that accurate assembly is realized, and the adjacent fixing structure 8 and the PCB are prevented from displacing along the circumferential direction.

The functional units are core components of the capsule core, and include, but are not limited to, a camera unit, an antenna 92, a control unit, and the like.

Referring to fig. 1, 10 and 11, in the dual-camera capsule endoscope 100, the PCB plate group 6 includes an illumination plate 61, an image collecting and processing plate 62, a power supply plate 63, an antenna transceiver plate 64, an image collecting and processing plate 62 and an illumination plate 61 which are distributed in sequence along the axial direction and connected in pairs by the flexible circuit board 7, and adjacent PCB plates are fixedly connected to each other by the fixing structure 8 to form a whole. The functional units comprise an illuminating lamp positioned on the illuminating plate 61, a camera 91 positioned on the image acquisition processing plate 62 and an antenna 92 connected to the antenna transceiving plate 64. The illuminating plate 61 is provided with a through hole 67 for exposing the camera 91; the battery unit 3 and the magnet unit 2 are located between the power board 63 and the antenna transceiver board 64, and the battery unit 3 is electrically connected with the power board 63 and the antenna transceiver board 64.

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 processing board 62 and the power supply board 63, a fixing member 82 for connecting the antenna transceiver board 64 and the image acquisition processing board 62, and a magnet fixing member 5. The structure of the lighting plate fixing member 81 is not limited, and the edge thereof extends into the fixing groove 13 and is glued to fix the capsule core in the housing 1.

The lighting panel fixing member 81 includes a ring-shaped holding wall 811, a holding frame 812 protruding outward from a front end of a part of the holding wall 811 to be able to be received in the fixing groove 13, a plurality of fixing clips 813 protruding inward from the holding wall 811 to fix and limit the lighting panel 61, and a notch portion provided on the holding wall 811 for the flexible circuit board 7 to pass through, the holding wall 811 being surrounded to form a mounting groove 814.

The fixing clamps 813 comprise two groups of fixing clamps 813 arranged at intervals along the front-back direction for clamping the lighting plate 61, the group of fixing clamps 813 arranged on the front side comprises a plurality of buckles arranged at intervals, and the group of fixing clamps 813 arranged on the back side comprises strip-shaped clamping strips extending along the holding wall 811. Preferably, the fastener and the fastener are installed in a staggered manner, the illumination plate 61 is accommodated in the installation groove 814 and is fastened between two sets of fixing fasteners 813, and the flexible circuit board 7 connected with the illumination plate 61 extends out through a notch part to be connected with the image acquisition processing board 62.

A positioning column 69 and/or a positioning hole 60 are/is arranged on one side of the holding wall 811 departing from the end cover 12; the image collecting and processing plate 62 is provided with a positioning hole 60 and/or a positioning column 69 matched with the image collecting and processing plate. The image capturing and processing board 62 and the holding wall 811 are fixed by the positioning post 69 and the positioning hole 60, and can be prevented from rotating in the circumferential direction. Preferably, a dispensing hole 68 is further formed in a side of the holding wall 811 facing away from the end cap 12, so that the stability of connection between the holding wall and the end cap is improved by dispensing.

Referring to fig. 13 to 14, in the single-camera capsule endoscope 100, the PCB plate group 6 includes a lighting plate 61, an image collecting and processing plate 62, a power supply plate 63, and an antenna transceiver plate 64 which are sequentially distributed along the axial direction and connected in pairs by the flexible circuit board 7, and adjacent PCB plates are fixedly connected to each other by the fixing structure 8 to form a whole. The functional units comprise an illuminating lamp positioned on the illuminating plate 61, a camera 91 positioned on the image acquisition processing plate 62 and an antenna 92 connected to the antenna transceiving plate 64. The illuminating plate 61 is provided with a through hole 67 for exposing the camera 91; the battery unit 3 and the magnet unit 2 are fixed between the power board 63 and the antenna transceiver board 64 through the magnet fixing member 5, and the battery unit 3 is electrically connected with the power board 63.

In this embodiment, the fixing structure 8 includes a lighting panel fixing member 81 for fixing the lighting panel 61, a fixing member 82 for connecting the image capturing and processing panel 62 and the power supply panel 63, and a magnet fixing member 5. The structure of the lighting panel fixing member 81 and the fixing manner thereof are the same as those of the above-described embodiment, and thus, the description thereof is omitted.

Referring to fig. 15, the only difference from fig. 13 and 14 is that the magnet fixing member 5 is not provided, and the battery unit 3 and the magnet unit 2 are integrally fixed between the power supply board 63 and the antenna transceiver board 64 by the battery fixing members 83 located at both sides. In the present embodiment, it is preferable to use the battery unit 3 and the magnet unit 2 shown in fig. 4 to 6, and the two batteries 31 are fixed by welding, so that the holding force is strong.

Referring to the embodiment shown in fig. 16 to 20, the embodiment differs from the embodiment shown in fig. 15 only in the manner of assembling the magnet unit 2 and the battery unit 3.

In this embodiment, the magnet unit 2 includes an accommodating cavity 22 axially penetrating the magnet unit 2, and the battery unit 3 is located in the accommodating cavity 22. Further, the battery unit 3 is adhered to the receiving cavity 22 by glue.

Specifically, the battery unit 3 may be one battery 31, or the battery unit 3 includes two batteries 31 distributed along the axial direction, and a battery connecting piece 42 connecting the two batteries 31 in series, and the battery connecting piece 42 is placed between the two batteries 31 in an accordion shape.

In addition, all the combinations of the battery unit 3 and the magnet unit 2 of the present invention may be used in the capsule endoscope 100 with a single camera, and may also be used in the capsule endoscope 100 with two cameras.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the feasible embodiments of the present invention, and is not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.

Claims (16)

1. A capsule endoscope comprises a shell and a capsule core arranged in the shell, wherein the capsule core comprises a magnet unit, and the capsule endoscope is characterized in that the distance between the magnetic force stress center of the magnet unit and the gravity center of the capsule endoscope is not more than a threshold value, and the threshold value is 5 mm.

2. The capsule endoscope of claim 1, wherein the capsule core further comprises a battery unit, the magnet unit being disposed adjacent to the battery unit.

3. The capsule endoscope of claim 2, wherein the battery unit comprises two batteries respectively located on both sides of the magnet unit, the two batteries being connected in series by an electrically conductive member.

4. The capsule endoscope of claim 3, wherein the magnet unit comprises an electrically conductive hole running axially through the magnet unit, the electrically conductive member passing through the electrically conductive hole in series with two batteries.

5. The capsule endoscope of claim 4, wherein the conductive member is a conductive rod, and both ends of the conductive rod axially protrude out of the conductive hole and abut against the two batteries, respectively.

6. The capsule endoscope of claim 4, wherein the conductive member is a battery connection tab comprising a central tab located within the conductive hole, electrical tabs located at both ends of the central tab and protruding out of the conductive hole to electrically connect with the battery; the electrical connection piece is located between the battery and the magnet unit.

7. The capsule endoscope of claim 4, wherein the conductive hole has a diameter of 0.5mm to 2 mm.

8. The capsule endoscope of claim 3, wherein the electrically conductive member extends along an outer surface of the magnet unit and connects two of the batteries in series.

9. The capsule endoscope of claim 8, wherein the conductive member is a metal plating covering the exterior of the magnet unit, the two batteries being in electrical contact with the metal plating.

10. The capsule endoscope of claim 3, wherein the capsule core further comprises a magnet holder circumferentially surrounding the two batteries and the magnet unit.

11. The capsule endoscope of claim 10, wherein the magnet holder comprises a boss protruding inward from an inner wall thereof, and an inner diameter of the magnet holder at a position where the boss is not provided is not smaller than an outer diameter of the battery; the inner diameter of the boss is not smaller than the outer diameter of the magnet and smaller than the outer diameter of the battery.

12. The capsule endoscope of claim 2, wherein the magnet unit includes a receiving cavity extending axially therethrough, the battery unit being located within the receiving cavity.

13. The capsule endoscope of claim 12, wherein the battery unit is adhered to the receiving cavity by glue.

14. The capsule endoscope of claim 12, wherein the battery unit comprises a battery; or the battery unit comprises two batteries distributed along the axial direction and a battery connecting piece connected with the two batteries in series, and the battery connecting piece is arranged between the two batteries in a folded shape.

15. The capsule endoscope of any one of claims 2 to 14, wherein the capsule core further comprises a set of PCB boards, a flexible circuit board and a fixing structure connecting adjacent PCB boards, functional elements fixed on the PCB boards; part of the PCB is positioned at one end of the magnet unit and the battery unit along the axial direction, and the other part of the PCB is positioned at the other end of the magnet unit and the battery unit along the axial direction; and the battery unit is electrically connected with at least one of the PCB boards.

16. The capsule endoscope of claim 15, wherein the attached fixing structure or PCB board is provided with dispensing holes, which are connected by dispensing reinforcement; and/or one of the adjacent fixing structure and the PCB is provided with a positioning column, and the other one is provided with a positioning hole.

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