JP6329496B2 - Battery assembly structure and capsule medical device - Google Patents

Description

  The present invention relates to a battery assembly structure and a capsule medical device in a capsule medical device that is introduced into a subject and performs imaging or the like.

  In recent years, in the field of endoscopes, development of capsule medical devices having an imaging function and a wireless communication function inside a capsule-type housing has been underway. In general, a capsule medical device is introduced into the body of a subject, images the inside of the subject, and acquires information about the subject such as an image.

  In a small-sized device such as a capsule-type medical device, a button-type battery is usually used as a battery that supplies power to various components such as an image sensor and a wireless module. The button type battery has a disk shape (button shape) having two opposing surfaces, the negative electrode is provided on one surface of the button shape, and the positive electrode covers the peripheral portion of the negative electrode surface from the other surface through the side surface. It has a structure.

  For example, in Patent Document 1, two rigid boards mounted with various components are connected by a flexible portion, two button batteries are arranged in series in a sheath member, and electrodes having spring characteristics are provided on each rigid board. A battery assembly structure is disclosed in which a flexible battery is mounted, a button-type battery is sandwiched between two rigid substrates, a contact with an electrode is secured, and the rigid substrate is fixed to a sheath member by a snap.

International Publication No. 2010/077941

  In the above-mentioned Patent Document 1, since a contact with the battery is obtained by utilizing the spring characteristic of the electrode, a rigid substrate must be used. For this reason, it has been difficult to save space in the capsule.

  The present invention has been made in view of the above, and has a battery assembly structure and a capsule-type medical device that can reliably take a contact point between the battery and the electrode and can save space in the capsule. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, the battery assembly structure according to the present invention includes at least one battery having a positive electrode surface and a negative electrode surface facing each other, and a plate member having conductivity, The first electrode member electrically connected to the positive electrode surface, the plate member having conductivity, the second electrode member electrically connected to the negative electrode surface, and the first and second electrode members are mounted. The first and second pressing portions that are formed by a plate-like spring member and are opposed to each other, and a connecting portion that connects the first and second pressing portions. And an assembly member for sandwiching the flexible substrate, the first and second electrode members, and the at least one battery in a state where the second electrode member is electrically connected to the positive electrode surface and the negative electrode surface, respectively. To prepare And butterflies.

  In the battery assembly structure, the first and second electrode members are mounted on the same surface of the flexible substrate, and the assembly member causes the first electrode member to contact the positive electrode surface, and With the two electrode members in contact with the negative electrode surface, the mounting portion of the first electrode member, the first electrode member, the at least one battery, and the second electrode member of the flexible substrate And the mounting part of the said 2nd electrode member is clamped in this arrangement order among the said flexible substrates.

  In the battery assembly structure, the first electrode member is provided with a convex portion protruding toward the positive electrode surface.

  In the battery assembly structure, the convex portions are arranged at three or more locations that pass through the same two-dimensional plane, and the first pressing portion presses the inner side of the two-dimensional region surrounded by the convex portions. A portion is provided.

  In the battery assembly structure, a mortar-shaped concave portion is provided on the surface of the first electrode member on the flexible substrate side, and a convex portion for pressing the concave portion is provided on the first pressing portion. It is characterized by that.

  In the battery assembly structure, the tip of the second pressing portion is bent toward the outside of the assembly member.

  In the battery assembly structure, the first and second electrode members are respectively mounted on both surfaces of the flexible substrate, the assembly member has conductivity, and the first pressing portion contacts the positive electrode surface. The first electrode member, the flexible substrate, the second electrode member, and the at least one battery are arranged in this order with the second electrode member in contact with the negative electrode surface. It is characterized by pinching.

  In the battery assembling structure, the tip of the first pressing portion is bent toward the outside of the assembling member.

  The battery assembly structure further includes a battery holder for fixing the at least one battery by covering an outer periphery of the at least one battery.

  In the battery assembly structure, the assembly member further includes an arm portion extending from the connection portion along an outer peripheral surface of the battery holder, and the recess portion that can be fitted to the arm portion in the battery holder. And the rotation of the battery holder in the circumferential direction and the movement in the direction of the rotation center axis with respect to the assembly member are regulated by fitting the arm portion into the recess.

  The capsule medical device according to the present invention is an assembly structure of a capsule-shaped casing and the battery, wherein the thickness direction of the at least one battery is parallel to the rotation center axis of the casing. And an assembly structure of a battery housed in a housing.

  The capsule medical device according to the present invention is an assembly structure of a capsule-shaped casing and the battery, wherein the thickness direction of the at least one battery is parallel to the rotation center axis of the casing. A battery assembly structure housed in a housing, and the outer peripheral surface of the battery holder abuts on the inner peripheral surface of the housing, and movement in the radial direction of the battery assembly structure is restricted. It is characterized by.

  The capsule medical device is housed in the housing and operates by receiving power supply from the at least one battery, a spacer that holds the functional portion in the housing, and an assembly structure of the battery. And a biasing member disposed between the spacer and biasing the spacer along the rotation center axis.

  According to the present invention, the first electrode member is electrically connected to the positive electrode surface of the battery and the second electrode member is electrically connected to the negative electrode surface of the battery by the assembly member formed by the plate-shaped spring member. Since the battery assembly structure is configured by sandwiching the flexible substrate, the two electrode members, and the battery, the contact point between the battery and the electrode can be reliably obtained without using a rigid substrate, and the inside of the capsule can be saved. It becomes possible to make space.

FIG. 1 is a cross-sectional view showing a configuration example of a capsule medical device according to Embodiment 1 of the present invention. FIG. 2 is a partial cross-sectional view showing the configuration of the battery unit shown in FIG. FIG. 3 is a plan view showing a flexible substrate on which the electrode member shown in FIG. 2 is mounted. FIG. 4 is a perspective view showing the assembly member shown in FIG. FIG. 5 is a plan view showing the positional relationship between the convex portion of the positive electrode side pressing portion shown in FIG. 2 and the convex portion of the electrode member. FIG. 6 is a cross-sectional view showing a part of the assembly structure according to the modification of Embodiment 1 of the present invention. FIG. 7 is a cross-sectional view showing a part of the assembly structure according to the modification of Embodiment 1 of the present invention. FIG. 8 is a perspective view showing a battery assembly structure according to Embodiment 2 of the present invention. FIG. 9 is a perspective view (positive electrode side) showing the battery assembly structure according to Embodiment 2 of the present invention. FIG. 10 is a perspective view (negative electrode surface side) showing the battery assembly structure according to Embodiment 2 of the present invention. FIG. 11 is a perspective view showing the battery holder shown in FIGS. FIG. 12 is a perspective view showing the assembly member shown in FIGS. FIG. 13 is a partial cross-sectional view showing an assembly structure (in the case of one battery) according to Embodiment 3 of the present invention. FIG. 14 is a partial cross-sectional view showing an assembly structure (in the case of two batteries) according to Embodiment 3 of the present invention. FIG. 15 is a partial cross-sectional view showing a battery assembly structure according to Embodiment 4 of the present invention.

  Hereinafter, a battery assembly structure and a capsule medical device according to an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited by these embodiments. Moreover, in description of each drawing, the same code | symbol is attached | subjected and shown to the same part. It should be noted that the drawings are schematic, and the dimensional relationships and ratios of each part are different from the actual ones. Also between the drawings, there are included portions having different dimensional relationships and ratios.

(Embodiment 1)
FIG. 1 is a cross-sectional view showing a configuration example of a capsule medical device according to Embodiment 1 of the present invention. As shown in FIG. 1, a capsule medical device 1 includes a capsule-shaped housing 10, two illumination units 11A and 11B housed in the housing 10, two imaging units 12A and 12B, and a control unit. 13, a wireless communication unit 14, a battery unit 15 that supplies power to each of these functional units, and a flexible substrate 16 that mounts and electrically connects these functional units and the battery unit 15. Among them, the illumination unit 11A, the imaging unit 12A, and the control unit 13 are assembled into a unit by being assembled with the spacer 17, and the illumination unit 11B, the imaging unit 12B, and the wireless communication unit 14 are assembled into a unit by being assembled with the spacer 18. Has been.

  The casing 10 includes a cylindrical casing 101 and dome-shaped casings 102 and 103, and is configured by closing both side opening ends of the cylindrical casing 101 with the dome-shaped casings 102 and 103. The cylindrical casing 101 is a colored casing that is substantially opaque to visible light. On the other hand, the dome-shaped casings 102 and 103 are optical members that are transparent to light in a predetermined wavelength band such as visible light. Such a casing 10 includes the illumination units 11A and 11B, the imaging units 12A and 12B, the control unit 13, the wireless communication unit 14, the battery unit 15, and the flexible substrate 16 in a liquid-tight manner. Hereinafter, the rotation center axis of the housing 10 is referred to as a long axis La.

  Each of the illumination units 11A and 11B includes an illumination substrate 111 mounted on the flexible substrate 16 and a plurality of illumination elements 112 disposed on the illumination substrate 111. The illumination element 112 includes an LED (Light Emitting Diode), an LD (Laser Diode), or the like, and emits illumination light such as white light.

  Each of the imaging units 12A and 12B includes a lens unit 121 in which a plurality of objective lenses are assembled in a lens frame, an imaging substrate 122 mounted on the flexible substrate 16, and an imaging device 123 such as a CMOS mounted on the imaging substrate 122. And have. The lens unit 121 is positioned so that the pupil center position coincides with the geometric center of the dome-shaped casings 102 and 103. The image sensor 123 is arranged with the light receiving surface 124 facing the lens unit 121 side, and receives the light that has passed through the lens unit 121 and photoelectrically converts the light to generate an electrical signal representing an image.

  The control unit 13 includes a rigid control board 131 mounted on the flexible board 16 and various electronic component groups 132 mounted on the control board 131. The electronic component group 132 stores, for example, a reed switch that performs a switch operation in response to an external magnetic field, a power supply IC that controls start / stop of a power supply according to the switch operation of the reed switch, operation setting information, and the like. Memory, crystal oscillator, power control unit for controlling power supply to the illumination units 11A and 11B and the imaging units 12A and 12B, an illumination control unit for controlling the operation of the illumination units 11A and 11B, and the imaging units 12A and 12B Including an imaging control unit for controlling the operation of the camera.

  The wireless communication unit 14 includes a rigid wireless substrate 141 mounted on the flexible substrate 16 and an electronic component 142 for wireless communication mounted on the wireless substrate 141. On the wireless substrate 141, an antenna (not shown) for transmitting a wireless signal is formed. The wireless communication unit 14 wirelessly transmits the image signal generated in the imaging units 12A and 12B from this antenna.

  The battery unit 15 is a unit in which at least one (two in FIG. 1) batteries 151 and 152 are integrated and mounted on the flexible substrate 16, and the illumination units 11A and 11B, the imaging units 12A and 12B, and the control unit 13 and the wireless communication unit 14 are supplied with power.

  The spacers 17 and 18 are produced by injection molding using a resin material such as ABS resin, polyacetal (POM), modified polyphenylene ether (PPE) (modified PPO).

  Next, battery unit 15 as the battery assembly structure according to Embodiment 1 will be described in detail. FIG. 2 is a partial cross-sectional view showing the configuration of the battery unit 15. As shown in FIG. 2, the battery unit 15 includes two batteries 151 and 152 coaxially connected in series, electrode members 153 and 154 mounted on the flexible substrate 16, these batteries 151 and 152, and electrodes Members 153 and 154, and an assembly member 155 that sandwiches the flexible substrate 16.

  Each of the batteries 151 and 152 is a so-called button-type silver oxide battery having positive electrode surfaces 151a and 152a and negative electrode surfaces 151b and 152b facing each other. In the housing 10, the batteries 151 and 152 are arranged in series, and are stored so that the thickness directions of the batteries 151 and 152 are parallel to the long axis La of the housing 10.

  Each electrode member 153, 154 is a plate-like member in which a metal material such as stainless steel or phosphor bronze is plated with gold to ensure electrical connection with the batteries 151, 152, and is mounted on the flexible substrate 16. Yes. The electrode member 153 contacts the positive electrode surface 151a of the battery 151 to ensure electrical conduction. On the other hand, the electrode member 154 is in contact with the negative electrode surface 152b of the battery 152 to ensure electrical conduction. The thickness of each electrode member 153, 154 is, for example, about 0.1 mm. The shape and size of each electrode member 153, 154 is not particularly limited as long as it falls inside the outer periphery of the positive electrode surface 151a and the negative electrode surface 152b with which the electrode members 153, 154 abut, respectively, and is circular, elliptical, rectangular, Various shapes such as an oval shape can be employed.

  FIG. 3 is a plan view showing the flexible substrate 16 on which the electrode members 153 and 154 are mounted. The flexible substrate 16 is a substrate in which a circuit layer made of a conductive foil is formed on a film-like member made of an insulating material such as polyimide via an adhesive layer. The flexible substrate 16 includes a positive electrode substrate portion 161 on which the electrode member 153 is mounted, a negative electrode substrate portion 162 on which the electrode member 154 is mounted, and a connecting portion 163 that connects the positive electrode substrate portion 161 and the negative electrode substrate portion 162. , And connecting portions 164 and 165 with regions in the flexible substrate 16 on which other functional portions are mounted. In the first embodiment, the electrode members 153 and 154 are mounted on the same surface of the flexible substrate 16.

  As shown in FIG. 3, the electrode member 153 is provided with a plurality of (four in FIG. 3) convex portions 153 a having a height of, for example, about 0.2 mm, which is punched on the side in contact with the battery 151. Yes. These convex portions 153a are provided to reduce the contact surface with the smooth positive electrode surface 151a and ensure a large contact pressure. The number and arrangement of the protrusions 153a are not limited as long as the electrical connection with the battery 151 can be ensured, but the protrusions 153a are preferably arranged at three or more places (four places in FIG. 3) passing through the same two-dimensional plane. Since the negative electrode surface 152b has a rougher surface than the positive electrode surface 151a, the electrode member 154 in contact with the negative electrode surface 152b does not need to be provided with a convex portion.

  FIG. 4 is a perspective view showing the assembly member 155. The assembly member 155 is a U-shaped leaf spring, the positive side pressing part (first pressing part) 155a and the negative side pressing part (second pressing part) 155b facing each other, and these positive side It has the connection part 155c which connects the press part 155a and the negative electrode side press part 155b. As the material of the assembly member 155, a steel material for a thin plate spring is used. Specific examples include stainless steel materials such as SUS304CSP and phosphor bronze steel materials such as C5210P.

  The assembly member 155 includes an electrode member 153, two batteries 151, 152, and an electrode member 154 (hereinafter referred to as the electrode member 153 via the flexible substrate 16 from the back surface of the flexible substrate 16 (the surface opposite to the mounting surface of the electrode members 153, 154). Are also sandwiched in this order. Then, the electrode member 153 is pressed toward the battery 151 and the electrode member 154 is pressed toward the battery 152. As shown in FIG. 4, in a state where no load is applied to the assembly member 155 (a state where no battery or the like is sandwiched), the distance between the positive electrode side pressing portion 155a and the negative electrode side pressing portion 155b is narrower toward the tip. It has become. By opening the tip and sandwiching a battery or the like, a biasing force is generated against the electrode members 153 and 154. This urging force is applied to the battery contact point so that a predetermined range of load is applied to the battery even when the total thickness of the battery or the like takes the maximum value or the minimum value (when there is one battery). The contact resistance is set to be stable and low.

  Of the positive-side pressing portion 155a, a protruding portion 155d having a height of about 0.2 mm, for example, is provided at the force point portion of the spring that contacts the electrode member 153. . FIG. 5 is a plan view showing the positional relationship between the convex portion 155d of the positive electrode side pressing portion 155a and the convex portion 153a of the electrode member 153. The convex portion 155d of the positive electrode side pressing portion 155a is a two-dimensional region (see FIG. 5) that is surrounded by three or more (four in FIG. 5) convex portions 153a when assembled to the battery portion 15. It is arranged at a position where it abuts on the inner side (preferably the substantially central part) of a triangular region or more. Thereby, the convex part 153a of the electrode member 153 can be pressed evenly, and conduction with the positive electrode surface 151a of the battery 151 can be reliably ensured.

  The tip end portion of the positive electrode side pressing portion 155a (the portion ahead of the convex portion 155a) is bent toward the outside of the assembly member 155 in a “<” shape. By bending the tip portion in this manner, the work for assembling the assembly member 155 to a battery or the like is facilitated.

  The tip of the negative electrode side pressing portion 155 b is bent in a “<” shape so as to open toward the outside of the assembly member 155. The ridge line 155e of the bent portion is set at a position where it can contact the electrode member 154 (see FIG. 2) through the flexible substrate 16. Accordingly, the urging force by the negative electrode side pressing portion 155 concentrates on the portion of the ridge line 155e, and the electrode member 154 can be pressed toward the battery 152 via the flexible substrate 16.

  When the battery part 15 is assembled, the connecting part 163 of the flexible substrate 16 is curved so that the electrode members 153 and 154 face inward, and the batteries 151 and 152 arranged in series are connected to the positive electrode part 161 and the negative electrode part. The electrode member 153 is brought into contact with the positive electrode surface 151 a of the battery 151, and the electrode member 154 is brought into contact with the negative electrode surface 152 b of the battery 152. Then, the batteries 151 and 152 sandwiched between the flexible substrate 16 are inserted by expanding the space between the positive electrode side pressing portion 155 a and the negative electrode side pressing portion 155 b of the assembly member 155, and pressed by the restoring force of the assembly member 155. Thereby, the battery part 15 is produced.

  Next, a method for assembling the capsule medical device 1 shown in FIG. 1 will be described. When the capsule medical device 1 is assembled, the illumination unit 11A, the imaging unit 12A, and the control unit 13 are assembled into a unit by assembling the spacer 17 in advance, and the illumination unit 11B, the imaging unit 12B, and the wireless communication unit 14 are assembled. Are assembled into a spacer 18 to form a unit. Further, the battery unit 15 is also prepared separately by the method described above. On the other hand, for the housing 10, a bottomed case is prepared by fitting the dome-shaped housing 103 into one open end of the cylindrical housing 101 and fixing it with an adhesive.

  Then, the unit assembled to the spacer 18, the battery unit 15, and the unit assembled to the spacer 17 are stored in this order in a bottomed case including the cylindrical casing 101 and the dome-shaped casing 103. Further, the dome-shaped casing 102 is fitted into the other opening end of the cylindrical casing 101 and fixed with an adhesive. Thereby, the capsule medical device 1 is completed.

  As described above, according to the first embodiment of the present invention, the batteries 151 and 152 are sandwiched by the flexible substrate 16 on which the electrode members 153 and 154 are mounted, and the U-shaped assembly member 155 having spring elasticity is used. Since these batteries and the like are integrated, it is possible to hold the batteries 151 and 152 in a state where the contact points between the batteries 151 and 152 and the electrode members 153 and 154 are secured without using a rigid substrate. . Therefore, the space inside the capsule can be saved.

(Modification)
6 and 7 are cross-sectional views showing a part of the assembly structure according to the modification of the first embodiment of the present invention. As shown in FIG. 6, in this modification, an electrode member 157 is mounted on the flexible substrate 16 instead of the electrode member 153 (see FIG. 2) that contacts the positive electrode surface 151 a of the battery 151. The electrode member 157 has a mortar-shaped recess 157 a provided on the back surface of the contact surface with the battery 151. The recess 157a is formed by, for example, a punching process.

  As shown in FIG. 7, when using the electrode member 157, the convex part 155d provided in the positive electrode side pressing part 155a of the assembly member 155 enters the concave part 157a via the flexible substrate 16, and the urging force by the positive electrode side pressing part 155a. Can be concentrated in the recess 157a. Therefore, it is possible to reliably secure a contact point between the electrode member 157 and the positive electrode surface 151a of the battery 151.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. 8 to 10 are perspective views showing a battery assembly structure according to Embodiment 2 of the present invention. 8 mainly shows the side surface of the assembly structure, FIG. 9 shows the positive electrode surface side, and FIG. 10 shows the negative electrode surface side.

  As shown in FIGS. 8 to 10, the battery unit 20 as the battery assembly structure according to the second embodiment includes button-type batteries 151 and 152, a battery holder 210 that holds these batteries 151 and 152, and Electrode members 153 and 154 (not shown in FIGS. 9 to 11, see FIG. 3) mounted on the flexible substrate 16 and an assembly member 220 are provided. The structures of the batteries 151 and 152, the electrode members 153 and 154, and the flexible substrate 16 are the same as those in the first embodiment.

  FIG. 11 is a perspective view showing the battery holder 210. The battery holder 210 is manufactured by injection molding using a resin material such as ABS resin, polyacetal (POM), or modified polyphenylene ether (PPE) (modified PPO). The battery holder 210 includes a holder main body portion 211 having a C shape obtained by cutting off a part of a cylinder, and a plurality of stopper portions 212 and 213 provided so as to protrude from the holder main body portion 211 to the inner peripheral side. The outer diameter of the battery holder 210 is slightly smaller than the inner diameter of the cylindrical casing 101 of the casing 10, and when the battery unit 20 is housed in the casing 10, the outer peripheral surface of the battery holder 210 is a cylindrical casing. Abutting on the inner peripheral surface of 101, the movement of the battery part 20 in the radial direction is restricted. Thereby, the movement of the batteries 151 and 152 in the radial direction is also restricted.

  The stopper portions 212 and 213 are provided at the end portion of the holder main body portion 211 to which the negative electrode surface 152b of the battery 152 is directed. The stopper portions 212 and 213 prevent the flexible substrate 16 and the batteries 151 and 152 from dropping to the side where the stopper portions 212 and 213 are provided (see FIG. 10).

  Cutouts 214 for allowing the connecting portions 164 and 165 of the flexible substrate 16 to pass therethrough are provided at a plurality of positions on the side surface end of the holder main body 211. Further, a T-shaped groove 215 used for positioning with the assembly member 220 is provided on the outer peripheral surface of the holder main body 211.

  FIG. 12 is a perspective view showing the assembly member 220. As shown in FIG. 12, the assembly member 220 is a U-shaped leaf spring, and has a plate-like positive side pressing part (first pressing part) 221 and a negative side pressing part (second pressing part) facing each other. A pressing portion) 222, a connecting portion 223 that connects the positive-side pressing portion 221 and the negative-side pressing portion 222, and an arm portion 224 that extends from the connecting portion 223. Further, the positive electrode side pressing part 221 is provided with a convex part 225 having a height of, for example, about 0.2 mm, which is struck toward the inside of the U-shape. The structures and functions of the positive electrode side pressing portion 221, the negative electrode side pressing portion 222, and the connecting portion 223 are the same as those of the assembly member 155 shown in FIG. Further, as the material of the assembly member 220, a steel material for a thin plate spring is used as in the first embodiment.

  The arm portion 224 has a T-shaped tip and is curved along the outer peripheral surface of the battery holder 210. By fitting the arm portion 224 into the groove portion 215 of the battery holder 210 described above, rotation in the circumferential direction and movement in the axial direction are restricted between the battery holder 210 and the assembly member 220.

  Next, a method for assembling the battery unit 20 will be described. First, the negative electrode substrate portion 162 of the flexible substrate 16 is fitted into the battery holder 210. At this time, the electrode member 154 mounted on the negative electrode substrate portion 162 is directed inward, and the back surface of the negative electrode substrate portion 162 is brought into contact with the stopper portions 212 and 213. Further, the connecting portions 164 and 165 of the flexible substrate 16 are fitted into the notches 214.

  Subsequently, the batteries 152 and 151 are sequentially fitted into the battery holder 210 with the negative electrode surfaces 152b and 151b facing the electrode member 154 side. And the connection part 163 of the flexible substrate 16 is curved, and the electrode member 153 mounted on the positive electrode substrate part 161 is brought into contact with the positive electrode surface 151a.

  Subsequently, the direction of the arm portion 224 of the assembly member 220 is aligned with the groove portion 215 of the battery holder 210, and the assembly member 220 is fitted into the flexible substrate 16, the batteries 151 and 152 and the electrode members 153 and 154 sandwiched therebetween, and the groove portion 215. The arm portion 224 is fitted to the arm. Accordingly, the electrode members 153 and 154 are pressed by the positive electrode side pressing portion 221 and the negative electrode side pressing portion 222 via the positive electrode substrate portion 161 and the negative electrode substrate portion 162, respectively, and the batteries 151 and 152 are fixed.

  In the second embodiment, by using the battery holder 210, the work can be easily performed even when the plurality of batteries 151 and 152 are assembled. In addition, since the battery holder 210 and the assembly member 220 are aligned via the arm portion 224 and the groove portion 215, the rotation of the batteries 151 and 152 in the circumferential direction and the movement in the axial direction can be restricted, and the battery 151 can be regulated. , 152 in the radial direction can be determined. Thereby, since the power point of the positive electrode side pressing part 221 and the negative electrode side pressing part 222 and the action point of the electrode members 153 and 154 can be maintained on the central axes of the batteries 151 and 152, the battery 151, It is possible to ensure the contact points of the electrode members 153 and 154 with respect to 152.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. 13 and 14 are partial cross-sectional views showing the battery assembly structure according to Embodiment 3 of the present invention. Among these, FIG. 13 shows a case where one battery is assembled, and FIG. 14 shows a case where two batteries are assembled.

  As shown in FIG. 13, the battery unit 30 as the battery assembly structure according to Embodiment 3 includes a button-type battery 151, a flexible substrate 301 on which electrode members 302 and 303 are mounted, and an assembly member 304. Prepare. Note that the structure of the battery 151 is the same as that of Embodiment 1.

  The flexible substrate 301 is a substrate in which a circuit layer made of a conductive foil is formed on a film-like member made of an insulating material such as polyimide via an adhesive layer. Like the flexible substrate 16 shown in FIG. A substrate on which the wireless communication unit 14 and the battery unit 30 are mounted. In the flexible substrate 301, electrode members 302 and 303 that are electrical contacts with the battery unit 30 are provided on the opposite surface of the flexible substrate 301. Specifically, the electrode member 302 is mounted on the side facing the assembly member 304 (left side in FIG. 13), and the electrode member 303 is in contact with the back surface (right side in FIG. 13 and the negative electrode surface 151b of the battery 151). It is mounted on the surface that comes into contact.

  The assembly member 304 is a U-shaped leaf spring, and the first pressing portion 305 and the second pressing portion 306 that face each other, and a connection that connects the first pressing portion 305 and the second pressing portion 306 to each other. Part 307. As the material of the assembly member 304, a thin plate spring steel material typified by a stainless steel material such as SUS304CSP or a phosphor bronze steel material such as C5210P is used.

  The front end portion of the first pressing portion 305 is bent in a “<” shape so as to open toward the outside of the assembly member 304. The ridge line 308 of the bent portion is set at a position where it can come into contact with the vicinity of the center of the positive electrode surface 151a. Thereby, the urging force by the first pressing portion 305 concentrates on the portion of the ridge line 308, and the first pressing portion 305 can be brought into contact with the positive electrode surface 151a and reliably pressed. In addition, you may further provide the convex part which protrudes toward the inner side of the assembly | attachment member 304 in the 1st press part 305 as a contact with the positive electrode surface 151a.

  In addition, the distal end portion of the second pressing portion 306 is also bent in a “<” shape toward the outside of the assembly member 304. By bending the tip portion in this manner, the work for assembling the assembly member 304 to a battery or the like is facilitated.

  When assembling the battery unit 30, the electrode member 303 is brought into contact with the negative electrode surface 151 b of the battery 151, and the first pressing unit 305 is aligned with the positive electrode surface 151 a side of the battery 151. The electrode member 303 and the battery 151 are sandwiched by the assembly member 304 in this arrangement order. At this time, it is preferable to prevent the short circuit of the battery 151 by extending the end 309 of the flexible substrate 301 and disposing it between the outer peripheral surface of the battery 151 and the assembly member 304. Thereby, the positive electrode surface 151 a of the battery 151 is electrically connected to the electrode member 302 through the assembly member 304 including the first pressing portion 305.

  In the battery unit 31 having the assembly structure shown in FIG. 14, the assembly member 304 is assembled in a state where the flexible substrate 301 on which the electrode members 302 and 303 are mounted and the batteries 151 and 152 are held by the battery holder 210 (see FIG. 8). ing. By using the battery holder 210, the rotation and displacement of the batteries 151 and 152 can be restricted, and the contact point between the positive electrode surface 151a and the assembly member 304 can be reliably secured.

  According to the third embodiment, the first pressing portion 305 of the assembly member 304 is also used as an electrode with the positive electrode surface 151a, so that the electrode member 153 provided with the convex portion 153a (see FIG. 2). Therefore, it is not necessary to use a thick member, so that further space saving of the battery unit 30 is possible. Moreover, since the handling of the flexible substrate 301 becomes easy, the assembly process of the battery unit 30 can be simplified.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described. FIG. 15 is a partial cross-sectional view showing a battery assembly structure according to Embodiment 4 of the present invention. As shown in FIG. 15, in the fourth embodiment, a battery unit 15, a unit in which a functional unit (illumination unit 11 </ b> A, imaging unit 12 </ b> A, and control unit 13) is assembled to the spacer 17, and a functional unit to the spacer 18. The energizing member 400 is arranged between the battery unit 15 and the spacer 18 when housing the unit in which the (illuminating unit 11B, the imaging unit 12B, and the wireless communication unit 14) are assembled in the housing 10. Thus, an urging force in the long axis La direction of the housing 10 is applied between the units.

  The urging member 400 is obtained by bending a part of a plate-like member formed of a stainless steel material such as SUS304CSP or a thin steel plate spring represented by a phosphor bronze steel material such as C5210P. The biasing member 400 includes a base portion 401 disposed in parallel with the spacer 18 and a spring portion 402 raised with respect to the base portion 401. At the tip of the spring portion 402, a contact portion 403 that is driven out toward the battery portion 15 is provided.

  When the capsule medical device is assembled, as shown in FIG. 1, the functional part is assembled to the spacer 18 in the bottomed case in which the dome-shaped housing 103 is fitted into the cylindrical housing 101 and fixed with an adhesive. The urging member 400 is disposed. The urging member 400 may be assembled to the spacer 18 in advance.

  Subsequently, the battery unit 15 is inserted into the bottomed case, and further, a unit in which the functional unit is assembled to the spacer 17 is inserted. Then, in a state where the unit is pushed in and the spring portion 402 is crushed, the dome-shaped casing 102 is fitted into the cylindrical casing 101 and fixed with an adhesive. As a result, the contact portion 403 comes into contact with the assembly member 155, and the urging force in the long axis La direction (see FIG. 1) of the housing 10 is generated between the units by the restoring force of the spring portion 402. Note that the spring force by the biasing member 400 is set in advance so that movement of each component housed in the housing 10 does not occur even when an external force such as vibration is applied to the capsule medical device. Has been.

  By using such an urging member 400, the spacers 17 and 18 are always arranged at the endmost portion that can move in the major axis La direction of the housing 10. As a result, the imaging units 12A and 12B assembled to the spacers 17 and 18 are also always arranged at specified positions with the extreme end as a reference. Therefore, even if there is some variation in the shape of each component housed in the housing 10, the lens units 121 (in the imaging units 12A and 12B with respect to the spheres of the dome portions of the dome-shaped housings 102 and 103). The pupil center position (see FIG. 1) can be reliably positioned.

  The arrangement of the urging member 400 in the housing 10 is not particularly limited as long as it is outside the force transmission path from the assembly member 155 to the batteries 151 and 152 in the battery unit 15. For example, the urging member 400 may be disposed between the battery unit 15 and the spacer 17.

(Embodiment 5)
Next, a fifth embodiment of the present invention will be described. As shown in FIG. 1, when the casing 10 is constituted by a plurality of parts such as the cylindrical casing 101 and the dome-shaped casings 102 and 103, the air trapped in the casing 10 is fitted between these parts. There is a case where the yield of the capsule medical device is lowered due to an air path generated by entering the part.

  Therefore, in the fifth embodiment, the shape and size of each component are defined as follows so as to ensure watertightness in the fitting portion between the components constituting the housing 10. In addition, since the structure of the fitting part of the cylindrical housing | casing 101 and the dome-shaped housings 102 and 103 is the same, in the following, the structure of the fitting part of the cylindrical housing 101 and the dome-shaped housing 102 is shown. This will be described as a representative.

  As shown in FIG. 1, the fitting portion between the cylindrical casing 101 and the dome-shaped casing 102 broadens the inner diameter by roughly cutting the inner peripheral surface of the end of the cylindrical casing 101. The outer diameter of the end of the dome-shaped casing 102 is cut away to reduce the outer diameter, the end of the cylindrical casing 101 is covered with the end of the dome-shaped casing 102, and the end surface of the cylindrical casing 101 is Is configured to be fitted until it comes into contact with the end face of the cutout portion of the dome-shaped casing 102.

  More specifically, in the fitting portion on the dome-shaped housing 102 side, a concave portion (groove portion) is formed over a part of the fitting surface (outer peripheral surface of the notched portion) and fitted. The outer shape of the region closer to the end than the recess (hereinafter referred to as the second dome fitting region) is smaller than the region of the portion closer to the top of the dome than the recess (hereinafter referred to as the first dome fitting region). (Ie, make it thin). On the other hand, in the fitting part on the cylindrical housing 101 side, the inner diameter of the fitting surface is made uniform to make a cylindrical side surface, and the inner peripheral surface of this cylindrical side surface (hereinafter referred to as an end inner peripheral surface) A convex portion that can be fitted into a concave portion provided in the fitting portion of the dome-shaped casing 102 is formed over one circumference. The position of the convex portion is set to a position where it fits into the concave portion on the dome-shaped housing 102 side when the end surface of the cylindrical housing 101 is brought into contact with the end surface of the cutout portion of the dome-shaped housing 102. . Furthermore, by making only the tip of the inner peripheral surface of the end portion a tapered surface, the cylindrical casing 101 and the dome-shaped casing 102 can be easily fitted.

  By defining the relationship between the shape and size of the fitting portion between the cylindrical housing 101 and the dome-shaped housing 102 as described above, when the two are fitted, the first dome fitting region (outer diameter is The second dome fitting region (region having a smaller outer diameter) and the cylindrical housing 101 are larger than the width of the gap in the region where the larger region) and the inner peripheral surface of the end of the cylindrical housing 101 face each other. The width of the gap in the region facing the end inner peripheral surface is wider.

  When the cylindrical casing 101 and the dome-shaped casing 102 are fitted to each other, an adhesive is applied to the fitting surfaces of the two, and the fitting portion on the dome-shaped casing 102 side is attached to the fitting section on the cylindrical casing 101 side. The fitting portion is covered, and the convex portion formed on the cylindrical housing 101 side is fitted into the concave portion formed on the dome-shaped housing 102 side. As a result, the adhesive applied to the fitting surface first has a gap between the first dome fitting region of the dome-shaped casing 102 and the inner peripheral surface of the end of the cylindrical casing 101 (a narrower gap). The second dome fitting region of the dome-shaped casing 102 through the region where the concave portion and the convex portion are fitted (hereinafter referred to as the concave and convex fitting region). And the gap between the inner peripheral surface of the end of the cylindrical casing 101 (the wider gap). That is, the cylindrical casing 101 and the dome-shaped casing 102 are sealed over two circumferences of the narrower gap and the wider gap. Thereby, even if the air inside the housing 10 enters the gap (the wider gap) between the second dome fitting region of the dome-shaped housing 102 and the inner peripheral surface of the end of the cylindrical housing 101, This air stays in the concave-convex fitting region and hardly enters the gap (narrower gap) between the first dome fitting region and the inner peripheral surface of the end of the cylindrical housing 101. As a result, it is difficult for an air path to occur in the fitting portion between the cylindrical casing 101 and the dome-shaped casing 102, and the yield of the capsule medical device can be improved.

  Embodiments 1 to 5 described above and modifications thereof are merely examples for carrying out the present invention, and the present invention is not limited to these. Moreover, the present invention can form various inventions by appropriately combining a plurality of constituent elements disclosed in the first to fifth embodiments and the respective modifications. It is obvious from the above description that the present invention can be variously modified according to specifications and the like, and that various other embodiments are possible within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Capsule type medical device 10 Case 11A, 11B Illumination part 12A, 12B Image pick-up part 13 Control part 14 Wireless communication part 15, 20, 30, 31 Battery part 16, 301 Flexible substrate 17, 18 Spacer 101 Cylindrical case 102, DESCRIPTION OF SYMBOLS 103 Dome-shaped housing | casing 111 Illumination board 112 Illumination element 121 Lens unit 122 Imaging board 123 Imaging element 124 Light receiving surface 131 Control board 132 Electronic component group 141 Radio | wireless board 142 Electronic component 151, 152 Battery 151a, 152a Positive electrode surface 151b, 152b Negative electrode surface 153, 154, 157, 302, 303 Electrode member 153a Convex part 155, 220, 304 Assembly member 155a, 221 Positive side pressing part 155b, 222 Negative side pressing part 155c, 223, 307 Connecting part 155d, 225 Convex part 155 308 Edge line 157a Concave portion 161 Positive electrode substrate portion 162 Negative electrode substrate portion 163, 164, 165 Connection portion 210 Battery holder 211 Holder main body portion 212, 213 Stopper portion 214 Notch 215 Groove portion 224 Arm portion 305 First pressing portion 306 Second pressing portion 309 End portion 400 Energizing member 401 Base portion 402 Spring portion 403 Contact portion

Claims (13)

At least one battery having a positive electrode surface and a negative electrode surface facing each other;
A first electrode member made of a conductive plate-like member and electrically connected to the positive electrode surface;
A second electrode member made of a conductive plate-like member and electrically connected to the negative electrode surface;
A flexible substrate on which the first and second electrode members are mounted;
The first and second electrodes are formed by a plate-shaped spring member, and have first and second pressing portions facing each other, and a connecting portion that connects the first and second pressing portions. An assembly member for holding the flexible substrate, the first and second electrode members, and the at least one battery in a state where the members are electrically connected to the positive electrode surface and the negative electrode surface, respectively.
A battery assembly structure characterized by that. The first and second electrode members are mounted on the same surface of the flexible substrate,
The assembly member includes the first electrode member of the flexible substrate in a state where the first electrode member is in contact with the positive electrode surface and the second electrode member is in contact with the negative electrode surface. Of the mounting portion, the first electrode member, the at least one battery, the second electrode member, and the flexible substrate, the mounting portion of the second electrode member is sandwiched in this arrangement order.
The battery assembly structure according to claim 1, wherein:   The battery assembly structure according to claim 2, wherein the first electrode member is provided with a convex portion that protrudes toward the positive electrode surface. The convex portions are arranged at three or more places passing through the same two-dimensional plane,
The first pressing part is provided with a convex part that presses the inside of a two-dimensional region surrounded by the convex part.
The battery assembly structure according to claim 3. A mortar-shaped recess is provided on the surface of the first electrode member on the flexible substrate side,
The first pressing portion is provided with a convex portion that presses the concave portion,
The battery assembly structure according to claim 2, wherein:   5. The battery assembly structure according to claim 2, wherein a tip end portion of the second pressing portion is bent toward the outside of the assembly member. 6. The first and second electrode members are respectively mounted on both surfaces of the flexible substrate;
The assembly member has conductivity, the first electrode member in a state where the first pressing portion is in contact with the positive electrode surface, and the second electrode member is in contact with the negative electrode surface, Sandwiching the flexible substrate, the second electrode member, and the at least one battery in this order;
The battery assembly structure according to claim 1.   The battery assembly structure according to claim 7, wherein a distal end portion of the first pressing portion is bent toward an outside of the assembly member.   The battery assembly structure according to any one of claims 1 to 8, further comprising a battery holder that fixes the at least one battery by covering an outer periphery of the at least one battery. The assembly member further includes an arm portion extending from the connection portion along the outer peripheral surface of the battery holder,
The battery holder is provided with a recess that can be fitted with the arm,
By fitting the arm portion to the recess, rotation of the battery holder in the circumferential direction with respect to the assembly member and movement in the rotation central axis direction are restricted.
The battery assembly structure according to claim 9. A capsule-shaped housing;
The battery assembly structure according to any one of claims 1 to 8, wherein the thickness direction of the at least one battery is housed in the casing in a direction parallel to a rotation center axis of the casing. Battery assembly structure,
A capsule-type medical device comprising: A capsule-shaped housing;
11. The battery assembly structure according to claim 9, wherein the battery has a thickness direction of the at least one battery that is housed in the housing in a direction parallel to a rotation center axis of the housing. ,
With
The outer peripheral surface of the battery holder is in contact with the inner peripheral surface of the housing, and movement in the radial direction of the battery assembly structure is restricted.
A capsule-type medical device. A functional unit that is housed in the housing and operates by receiving power supply from the at least one battery;
A spacer for holding the functional unit in the housing;
A biasing member disposed between the battery assembly structure and the spacer, and biasing the spacer along the rotation center axis;
The capsule medical device according to claim 11, further comprising:

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