WO2005067783A1 - 内視鏡用撮像装置およびカプセル型内視鏡 - Google Patents
内視鏡用撮像装置およびカプセル型内視鏡 Download PDFInfo
- Publication number
- WO2005067783A1 WO2005067783A1 PCT/JP2005/000546 JP2005000546W WO2005067783A1 WO 2005067783 A1 WO2005067783 A1 WO 2005067783A1 JP 2005000546 W JP2005000546 W JP 2005000546W WO 2005067783 A1 WO2005067783 A1 WO 2005067783A1
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- Prior art keywords
- lens
- capsule endoscope
- board
- image sensor
- imaging
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
- A61B1/051—Details of CCD assembly
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00025—Operational features of endoscopes characterised by power management
- A61B1/00027—Operational features of endoscopes characterised by power management characterised by power supply
- A61B1/00032—Operational features of endoscopes characterised by power management characterised by power supply internally powered
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
- A61B1/00096—Optical elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00188—Optical arrangements with focusing or zooming features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/041—Capsule endoscopes for imaging
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/144—Stacked arrangements of planar printed circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/148—Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/04—Assemblies of printed circuits
- H05K2201/042—Stacked spaced PCBs; Planar parts of folded flexible circuits having mounted components in between or spaced from each other
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10037—Printed or non-printed battery
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4688—Composite multilayer circuits, i.e. comprising insulating layers having different properties
- H05K3/4691—Rigid-flexible multilayer circuits comprising rigid and flexible layers, e.g. having in the bending regions only flexible layers
Definitions
- the present invention relates to an imaging device for an endoscope and a capsule endoscope which are configured to acquire an image inside a subject when inserted into the subject.
- this capsule endoscope accommodates a wiring board 2 and a power source 3 that constitute a functional circuit inside a sealed container 1 formed in a capsule shape, and is used for a subject as a subject. An image of the inside is acquired while being inserted into a body cavity.
- the closed container 1 includes a cylindrical container body la having a bottom and a tip cover lb formed of an optical material.
- the container 1 After the wiring board 2 and the power supply 3 are accommodated inside the container body la, the container 1 It is configured by attaching the tip cover lb to the tip of the container body la while ensuring the desired water tightness during the period.
- the hermetically sealed container 1 is large enough to be swallowed by humans, and has a hemispherical shape at both ends.
- Various functional components and electronic components such as an illumination unit 4, a lens unit 5, an image sensor 6, and a wireless transmission unit 7, which constitute the functional circuit described above, are mounted on the wiring board 2.
- the subject may swallow it while the power supply 3 is turned on.
- the capsule endoscope When the capsule endoscope is inserted into the body cavity of the subject, the irradiation light from the illuminating means 4 passes through the tip cover lb to the subject, for example, the stomach, small intestine, large intestine, etc., until it is excreted outside the body. While being irradiated, the reflected light incident through the front cover lb is imaged on the image sensor 6 through the lens unit 5, and the reflected light imaged on the image sensor 6 is output as an image signal.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-91860
- an imaging apparatus for an endoscope contacts an image sensor having a polygonal outer shape and forms an image on the image sensor.
- a lower edge portion force of the lens supporting member extends a contact portion capable of contacting at least two sides of an outer shape of the image sensor.
- the lens is positioned at a predetermined position of the image sensor by positioning the lens support member by contacting the contact portion with at least two sides of the outer shape of the image sensor. It is characterized by.
- the lens support member includes a lens frame supporting a lens, and the lens frame inserted into one end side.
- the holder is a cylindrical member that is supported by the holder, and the contact portion is formed to extend from the other end of the holder.
- the lens support member is fixed to the image sensor with a black adhesive, The exposed surface is shielded from light by a black adhesive.
- a capsule endoscope includes: an illumination board unit provided with an illumination unit that emits illumination light for irradiating a test site of a subject;
- the test site An imaging board portion provided with an image sensor for taking an image, and a flexible wiring board connected to the illumination board portion and the imaging board portion and formed integrally with the illumination board portion and the imaging board portion.
- a lens support member comprising a cylindrical member that supports a lens that forms an image of the reflected light of the illumination light from the test site, and has one end positioned with respect to the image sensor; and the lens support member.
- the lens support member is formed on the one end side positioned with respect to the image sensor.
- a large-diameter portion having an outer diameter of a predetermined size, a small-diameter portion formed on the other end side communicating with the hole and having an outer diameter smaller than the one end side, and the large-diameter portion and the small-diameter portion.
- the imaging board unit is provided with an electronic component having a predetermined height for driving the image sensor.
- a length in a height direction from the imaging substrate unit to the step formed on the lens support member is a height of the electronic component. It is characterized by being longer than the length in the direction.
- the capsule endoscope according to claim 7 of the present invention is the capsule endoscope according to any one of claims 4 to 6, wherein an assembly length of the flexible wiring board portion force and the image sensor and the lens support member. Longer than that.
- a distal end cover which is formed of an optical material into a substantially hemispherical dome shape whose base end side is open, and constitutes a distal end portion of the closed container, An interior member disposed inside the base end side of the distal end cover, a lens unit held by the interior member and configured to image light incident through the distal end cover, and between the distal end cover and the interior member.
- the interior members When the interior members are inserted into the base end side of the distal end cover, they are engaged with each other so that the center of the pupil of the distal end cover and the center of the pupil of the lens unit are mutually aligned on the same optical axis. And positioning means for matching.
- the positioning means engages the tip cover and the interior member so as to be relatively rotatable around an optical axis. It is characterized by doing.
- the positioning means projects inward from an inner peripheral surface of the distal end cover, and the interior member A projection that positions the center of the pupil of the lens unit at the pupil center of the tip force bar while restricting the inclination of the optical axis of the lens unit with respect to the optical axis of the tip cover. It is characterized by the following.
- a capsule endoscope according to claim 11 of the present invention is characterized in that, in the above-mentioned claim 10, the protruding portion is provided on the entire inner surface of the distal end cover.
- the lens unit in the eighth aspect, includes a lens member and a cylindrical lens frame that holds the lens member.
- a frame is provided with a light-shielding portion for limiting incident light around the incident side of the lens member.
- At least a portion of the distal end cover that is an incident range of light passing through the lens unit is formed to have a uniform thickness. It is characterized by having been formed.
- At least a part of the interior member has a distal end when disposed inside the proximal end side of the distal end cover.
- the present invention it is possible to easily position a lens at a predetermined position of an image sensor while enabling downsizing and narrowing.
- FIG. 1 is a cross-sectional side view of a capsule endoscope according to an embodiment of the present invention.
- FIG. 2 is an exploded plan view of a wiring board as an interior member of the capsule endoscope shown in FIG. 1.
- FIG. 3 is a cross-sectional side view of FIG. 2.
- FIG. 4 is a bottom view of FIG. 2.
- FIG. 5 is a sectional view taken along line VV in FIG. 1.
- FIG. 6 is a sectional view taken along line VI-VI in FIG. 1.
- FIG. 7 is a sectional view taken along line VII-VII in FIG. 1.
- FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 1.
- FIG. 9 is a sectional view taken along line IX-IX in FIG. 1.
- FIG. 10 is a cross-sectional view taken along the line XX in FIG. 1.
- FIG. 11 is a sectional view taken along line XI-XI in FIG. 1.
- FIG. 12 is an enlarged cross-sectional view of the imaging substrate unit shown in FIG. 1.
- FIG. 13 is a front view showing a CCD and a positioned holder.
- FIG. 14 is a side view showing a CCD and a positioned holder.
- FIG. 15 is a side sectional view showing a CCD and a positioned holder.
- FIG. 16 is an enlarged sectional view showing a main part of an interior member applied to the capsule endoscope shown in FIG. 1.
- FIG. 17 stores the interior member of the capsule endoscope shown in FIG. 1 in a closed container. It is an exploded sectional side view showing a state.
- FIG. 18 is a sectional side view of a tip cover applied to the sealed container of the capsule endoscope shown in FIG. 1.
- FIG. 19 is a sectional view taken along line XIX-XIX in FIG. 18.
- FIG. 20 is a conceptual diagram for explaining an example of use of a capsule endoscope.
- FIG. 21 is a cross-sectional side view showing a conventional capsule endoscope.
- Lens unit Lens frame a Sliding part b Mounting part c Light shielding part d Shoulder
- FIG. 1 is a sectional side view showing a capsule endoscope according to one embodiment of the present invention.
- the capsule endoscope C exemplified here has a size that can be inserted into the body through the mouth of a subject, for example, a human or an animal, and is inserted into the body and excreted outside the body. During this time, image data as information inside the gastrointestinal tract such as the stomach, small intestine, and large intestine is acquired.
- a capsule-shaped hermetic container 100 accommodating the internal power supply 10 and the wiring board 20 is provided.
- the internal power supply 10 is for accumulating drive power to be supplied to the functional circuit.
- three general-purpose button-type silver oxide batteries (hereinafter simply referred to as button-type batteries 10) are applied as the internal power supply 10.
- the number of button-type batteries 10 to be applied does not necessarily need to be three, but may be appropriately determined according to the time in which the functional circuit is to be operated.
- a rechargeable battery, a power generation battery, or the like that does not necessarily need to be a silver oxide battery may be used.
- the wiring board 20 is a composite board (hereinafter, appropriately referred to as a rigid board) including a plurality of rigid wiring board sections 20R and a flexible wiring board section 20F for connecting the plurality of rigid wiring board sections 20R in series.
- Flexible printed circuit board 20 The rigid wiring board portion 20R is made of a relatively rigid base material such as glass epoxy resin, and is mainly used for mounting various functional components and electronic components for forming a functional circuit. is there.
- the flexible wiring board portion 20F is made of a flexible film-like base material such as polyimide, polyester resin, etc., and is mainly used to electrically connect the plurality of rigid wiring board portions 20R to each other. It is the part which becomes.
- the functional circuit configured on the wiring board 20 includes, for example, an illumination function for irradiating a predetermined imaging range with illumination light, an imaging function for converting reflected light due to the illumination light irradiation into an image signal, and an internal power supply 10.
- Switch function to turn ON / OFF the supply power of the power supply, voltage conversion function to adjust the internal power supply voltage to a preset constant voltage, transmission processing function to perform modulation / amplification on a given image signal, modulation / amplification It has a plurality of preset function parts necessary for acquiring image data, such as an antenna function for externally outputting the image signal as a wireless signal and a control function for controlling these functions comprehensively.
- the plurality of functional portions are divided into the respective rigid wiring board portions 20R. That is, the rigid wiring board section 20R of the wiring board 20 includes an illumination board section 20R1 for implementing an illumination function, an imaging board section 20R2 for implementing an imaging function and a control function, and a switch for implementing a switch function. Substrate section 2 OR3, power supply board section 20R4 for implementing the voltage conversion function, transmission board section 20R5 for implementing the transmission processing function, and antenna board section 20R6 for implementing the antenna function. You.
- the lighting board portion 20R1 has a disc shape, has a mounting hole 21 at the center thereof, and has a part of the peripheral surface. Has a straight portion 22R1.
- the mounting hole 21 and the straight portion 22R1 serve as a reference for disposing the electronic components disposed on the lighting board unit 20R1.
- the mounting hole 21 is a portion where a lens unit 30 described later is mounted, and has a small diameter circular shape.
- the linear portion 22R1 is formed by linearly cutting off the peripheral portion of the illumination board portion 20R1, and is provided in a direction perpendicular to the extending direction of the flexible wiring board portion 20F.
- the lighting board section 20R1 has a white die on one of the mounting surfaces to realize the lighting function.
- a light emitting element 23 such as an ode (Light Emitting Diode) is mounted. As shown in FIGS. 4 and 5, the four light emitting elements 23 are mounted at the same distance from the mounting hole 21 and at equal angular positions about the mounting hole 21 at equal intervals.
- the number of the light emitting elements 23 is not limited to four, but may be three or less or five or more as long as the lighting function can be sufficiently performed.
- the light emitting element need not necessarily be a diode [EL (.electroluminescence)].
- the electronic components include tall electronic components such as a driving electronic component for driving the light emitting element 23 and an electronic component for supplying a stable voltage to the light emitting element 23, and electronic components having a short height such as a small capacitor and a resistor.
- the illumination board section 20R2 is disposed on the surface of the imaging board section 20R2 facing the lighting board section 20R1 (the front surface of the imaging board section 20R2). It faces electronic components such as short capacitors or resistors, which will be described later.
- short electronic components such as a small capacitor and a resistor are formed by bending a flexible wiring board portion 20F that connects the illumination board portion 20R1 and the imaging board portion 20R2, thereby forming the illumination board portion 20R1 and the imaging board portion 20R2.
- a large, tall capacitor described later which is disposed on the surface of the imaging substrate unit 20R2 facing the illumination substrate unit 20R1 (the front surface of the imaging substrate unit 20R2).
- the flexible wiring board section 20F connecting the lighting board section 20R1 and the imaging board section 20R2 is bent, and the rigid flexible wiring board 20 on which the lighting board section 20R1 and the imaging board section 20R2 are arranged is placed.
- Electronic components such as tall, large capacitors, short small capacitors, resistors, etc., which are arranged on the front of the imaging board unit 20R2.
- Electronic components such as a power supply, a short and small capacitor, and a resistor are installed on the back of the lighting board 20R1.
- the distance between the lighting board unit 20R1 and the imaging board unit 20R2 is set after the lighting board unit 20R1.
- the height can be made smaller than the sum of the height of the tall electronic components disposed on the surface and the tall electronic components disposed on the front surface of the imaging board unit 20R2.
- the flexible wiring board portion 20F is formed to be longer than the assembly length of an image sensor and the lens unit 30 described later.
- the illumination board unit 20R1 configured as described above is disposed to face the imaging board unit 20R2 with a predetermined interval, and then electrically insulated and fixed by an adhesive having an insulating property.
- the imaging substrate section 20R2 has a disk shape equivalent to or slightly smaller than the illumination substrate section 20R1. It has a straight section 22R2 at two places.
- the linear portion 22R2 is formed by linearly cutting off the periphery of the imaging substrate portion 20R2, and is provided in a direction parallel to each other and perpendicular to the extending direction of the flexible wiring board portion 20F. .
- the extending direction of these linear portions 22R2, ie, the flexible wiring board portion 20F, is a reference for disposing the electronic components to be disposed on the imaging substrate portion 20R2.
- the image sensor On one mounting surface (front surface) of the imaging board unit 20R2, the image sensor is mounted on a ball grid array (Ball) so that the extending direction of the flexible wiring board unit 20F and the pixel arrangement direction are aligned.
- a ball grid array All
- An image sensor has a polygonal outer shape, for example, a CCD (Charge and Oupled Diode), and a CMOs (Complementary
- a pixel surface of a rectangular solid-state image sensor (hereinafter simply referred to as CCD 26) such as Metal Oxide Semiconductor) is covered with a cover glass 28.
- a holder 29 (lens supporting member) is attached to the cover glass 28, and a lens unit 30 is mounted inside the holder 29. .
- the holder 29 has a cylindrical tubular portion 29a having a larger diameter than the pixel surface of the CCD 26, and a base portion 29b formed integrally with the proximal end of the tubular portion 29a.
- the hole formed in the cylindrical portion 29a penetrates the base 29b, and can guide the light incident from the holder 29 to the CCD.
- the outer surface of the lower surface of the base 29b, that is, the surface in contact with the upper surface of the CCD 26 has a substantially square shape with one side substantially the same length as the short side of the cover glass 28, and the lower edge is adjacent to the lower surface.
- Contact portions 29c that abut against the side surfaces of the cover glass 28 extend downward from the sides. As shown in FIGS.
- the holder 29 has the lower surface of the base portion 29b in contact with the upper surface of the cover glass 28, and the contact portion 29c and the adjacent two side surfaces of the cover glass upper surface.
- the cylindrical portion 29a is attached to the cover glass 28 with high accuracy via the base portion 29b in a state where the axis of the cylindrical portion 29a is aligned with the central axis (optical axis) L of the visual field in the CCD 26.
- a reinforcing portion 29d having substantially the same shape as the contact portion 29c extends from the lower edge of the holder 29, and the cover glass 28 and the holder 29 are fixed to each other with a black adhesive after being attached. Then, as shown in FIG. 12, a black adhesive 29e is applied to the exposed surface of the cover glass 28 that is not covered by the holder 29, so that light from the exposed surface can be prevented, and the CCD 26 A clear image can be projected.
- the lens unit 30 includes a cylindrical lens frame 31 and a pair of lens members 32 and 33.
- the lens frame 31 has a relatively large-diameter cylindrical slide portion 31a having an outer diameter that fits into the cylindrical portion 29a of the holder 29, and the axial center of the slide portion 31a is aligned with the distal end of the slide portion 31a.
- the mounting part 31b which has a relatively small diameter and has an outside diameter that fits into the mounting hole 21 of the lighting board part 20R1, It is formed integrally with a light shielding portion 31c protruding toward it.
- the outer peripheral surface of the lens frame 31 has a step portion 31d between the slide portion 31a and the mounting portion 31b.
- the front end of the lens frame 31 is a portion that takes in incident light that forms an image on the CCD 26, and the light blocking portion 31c is a portion corresponding to an entrance pupil for defining an observation range of image data with respect to the lens unit 30.
- the outer end surface of the light-shielding portion 31c is depressed in a funnel shape so as to gradually face the other end side toward the central axis.
- a small-diameter portion and a large-diameter portion are formed on the inner peripheral surface of the lens frame 31, and a boundary portion is defined by a step.
- the small-diameter portion is fitted with a small-diameter lens 32 having a flat upper surface and a convex lower surface, and having a large refractive index.
- the flat portion of the small-diameter lens 32 abuts the light-shielding portion 31c, and the peripheral portion of the small-diameter lens 32 has a small diameter.
- the large-diameter portion is fitted with a cylindrical spacer 34 and a large-diameter lens 33 having a convex upper surface and a flat rear surface, which has a small refractive index for light.
- the large-diameter lens 33 and the small-diameter lens 33 are mounted inside the lens frame 31 in a state where the optical axes of the small-diameter lens 32 and the large-diameter lens 33 are aligned with each other.
- the lens unit 30 slides on the cylindrical portion 29a of the holder 29 via the slide portion 31a with the light shielding portion 31c facing outward. It is possible to adjust the focus by appropriately changing the position in the optical axis direction with respect to the pixel surface of the CCD 26.
- a large capacitor for a power supply voltage circuit for driving the CCD 26 is provided on both sides with reference to the arrangement of the CCD 26. Avoid, small electronic components such as capacitors and resistors necessary to drive CCD26 are neatly arranged.
- a processor element such as a DSP (Digital Signal Processor) for realizing a control function is mounted on the other mounting surface (rear surface) of the imaging substrate unit 20R2 by flip-chip bonding.
- DSP25 Digital Signal Processor
- Electronic components such as capacitors are arranged neatly using the DSP25 as a reference. For this reason, electronic components can be integrated, which can contribute to miniaturization of the capsule endoscope.
- the DSP 25 performs CCD signal processing and drive control of the lighting board in addition to the control functions described above.
- a plurality of pad portions 35 serving as external terminals are provided on the other mounting surface of the imaging substrate portion 20R2 outside the mounting area for electronic components and the like.
- These pad portions 35 are conductor portions which are exposed in a circular shape on the mounting surface of the imaging board portion 20R2, and are not shown in the drawing. It has a portion functioning as a terminal and a portion functioning as an external input terminal for inputting an initial setting value of a functional circuit to a memory described later.
- the switch substrate 20R3 has a disk shape equivalent to or slightly smaller than the imaging substrate 20R2, and is similar to the imaging substrate 20R2. It has a straight portion 22R3 at two locations on the peripheral surface and a relief hole 36 at the center.
- the straight portion 22R3 is formed by linearly cutting off the periphery of the switch substrate portion 20R3, and is provided in a direction parallel to each other and perpendicular to the extending direction of the flexible wiring board portion 20F. .
- the extending direction of these straight portions 22R3, ie, the flexible wiring board portion 20F, is a reference for disposing electronic components to be disposed on the switch board portion 20R3.
- the escape hole 36 is for accommodating a part of a reed switch 37 described later, and has a long hole shape extending along the straight portion 22R3.
- a part of the mounting surface side force is also accommodated in the escape hole 36.
- a read switch 37 for realizing the switch function in a manner to cause the switch function is mounted. Therefore, the height of the reed switch 37 protruding toward the front side can be suppressed.
- electronic parts such as a memory 38, a vibrator, and a MIX are neatly mounted on a part around the escape hole 36 on one mounting surface.
- the reed switch 37 is a latch-type switch that operates depending on the presence or absence of a magnetic field and turns on or off the power supplied from the internal power supply 10.
- the power supply from the internal power supply 10 is turned off when a magnetic field acts by bringing a permanent magnet close thereto or the like, while the power supply from the internal power supply 10 is continued when the magnetic field does not work. The one that operates so that it is turned on is applied.
- the memory 38 is a volatile storage means for storing data required for driving the functional circuit, such as the initial setting value of the DSP 25.
- Examples of the initial setting value of the DSP 25 include a white balance coefficient of the CCD 26, data for correcting a defect caused by variation of the CCD 26, and pixel defect address data of the CCD 26.
- the oscillator gives the DSP25 a basic clock.
- the MIX is mounted by flip-chip bonding and has a function of mixing two signals, a video signal and a clock signal, output from the DSP 25 into one signal.
- a flat panel-shaped positive contact member 39 serving as a contact with the positive electrode of the button type battery 10.
- the power supply board portion 20R4 has a disk shape smaller in diameter than the switch board portion 20R3 and smaller in diameter than the negative electrode of the button type battery 10. It has linear portions 22R4 at two locations on the peripheral surface, like the switch substrate portion 20R3.
- the straight portion 22R4 is formed by linearly cutting off the peripheral portion of the power supply board portion 20R4, and is provided in a direction parallel to each other and perpendicular to the extending direction of the flexible wiring board portion 20F. It is.
- the extending direction of the straight portion 22R4, that is, the extending direction of the flexible wiring board portion 20F is a reference for disposing the electronic components to be disposed on the power supply board portion 20R4.
- a plurality of electronic components for realizing voltage change are mounted on one mounting surface of the power supply board unit 20R4, for example, a DCDC converter 40 is configured.
- the DCDC converter 40 is used to obtain the constant voltage required for the capsule endoscope. Is to control.
- a negative electrode contact member serving as a contact with the negative electrode of the button type battery 10 is provided on the other mounting surface of the power supply board unit 20R4.
- the transmission board section 20R5 has a disk shape equivalent to or slightly smaller than the switch board section 20R3, and has a rigid flexible wiring. It is created independently of the board 20, and then one mounting surface (front) of the transmitting board section 20R5 and the flexible wiring board section 20F are connected by through-hole lands.
- the transmission board section 20R5 has a linear portion 22R5 on a part of the peripheral surface, similarly to the illumination board section 20R1.
- the linear portion 22R5 is formed by linearly cutting off the peripheral portion of the transmission substrate portion 20R5, and the linear portion 22R5 is a reference for disposing electronic components mounted on the transmission substrate portion 20R5.
- a plurality of electronic components for realizing the transmission processing function are mounted on the other mounting surface of the transmission board unit 20R5, for example, an RF (Radio Frequency) unit 42 is configured.
- RF Radio Frequency
- the antenna substrate 20R6 has a disk shape smaller in diameter than the transmission substrate 20R5, and is parallel to the other mounting surface of the transmission substrate 20R5. It is attached in an aspect.
- An antenna 43 is formed by laying a substantially spiral conductive wire on the antenna substrate 20R6. Although not explicitly shown in the figure, both ends of the conductor forming the antenna 43 are electrically connected to the circuit portion of the transmission board 20R5. Therefore, the RF unit 42 can extract a signal having a fixed frequency, amplitude, and waveform from the signal mixed by the switch board unit 20R3 and transmit the signal from the antenna board unit 20R6 to the outside.
- these rigid wiring board sections 20R include an illumination board section 20R1, an imaging board section 20R2, a switch board section 20R3, a power supply board section 20R4, and a transmission board section 20R5. It is configured in a state of being connected in a straight line by the flexible wiring board portion 20F in the order described.
- the lighting board section 20R1 to the power supply board section 20R4 are integrated into a flat plate with the flexible wiring board section 20F, and after mounting electronic components on each, an antenna is attached to the end of the flexible wiring board section 20F.
- the transmission board section 20R5 integral with the board section 20R6 the rigid-flex wiring board 20 in a straight line is formed.
- the lighting board unit 2 configured integrally with the flexible wiring board unit 20F into a flat plate shape.
- Electronic components can be easily mounted on the rigid wiring board 20R from 0R1 to the power supply board 20R4 by applying a general mounting technique.
- the rigid wiring board portion 20R and the flexible wiring board portion 20F, which are integrally formed, are already electrically connected at the time of manufacture, connection work between the two may be required separately. The manufacturing process can be shortened, and the assembling work can be facilitated.
- the flexible wiring board portions 20F arranged between the rigid wiring board portions 20R are configured to have different widths and lengths as necessary. Among them, the flexible wiring board portion 20F disposed between the switch board portion 20R3 and the power supply board portion 20R4 has a comparatively wide width and is divided into two by a slit 20FS formed along the longitudinal direction.
- the rigid-flexible wiring board 20 formed in a straight line first, an operation confirmation test of a functional circuit is performed, and then, as shown in FIG. 1, the adjacent rigid wiring board sections 20 R are opposed to each other.
- the button-type battery 10 is bent in a state where the flexible wiring board portion 20F is appropriately bent and the orientation between the positive contact member 39 of the switch board portion 20R3 and the negative contact member (not shown) of the power supply board portion 20R4 is matched.
- the interior member that can be accommodated in the sealed container 100 is formed into a cylindrical block.
- the operation confirmation test is for confirming whether or not the power can operate normally when power is supplied to the functional circuit.
- the rigid / flexible wiring board 20 having the above configuration, it is possible to perform the operation confirmation test of the functional circuit while keeping the linear state as shown in FIGS. That is, according to the rigid / flexible wiring board 20 in which the pad section 35 is provided on the imaging board section 20R2, for example, the needle-shaped electrode of the external power supply is brought into contact with the pad section 35 functioning as the external power supply terminal, so that the power to the functional circuit is reduced. Supply can be made.
- the functional circuit can be used. It is possible to carry out an operation check and to guarantee its reliable operation.
- the button-type battery 1 serving as an internal power supply can be used. Since no 0 is consumed, even when a relatively small button-type battery 10 is applied, the operation time of the functional circuit using the button-type battery 10 can be sufficiently ensured.
- initialization processing such as supplying the power from the external power supply and inputting the initial setting values of the functional circuits to the memory 38 of the switch board 20R3 through the pad 35 functioning as an external input terminal. Is also possible.
- the other mounting surface (rear surface) of the illumination board 20R1 and the other of the imaging board 20R2 With the mounting surface (front) facing each other, the mounting hole 21 of the illumination board 20R1 is fitted to the mounting part 31b of the lens unit 30, and the step formed between the sliding part 31a of the lens frame 31 and the mounting part 31b. Insert until the part 31d hits the other mounting surface of the lighting board part 20R1.
- the step 31d formed between the sliding part 31a and the mounting part 31b of the lens frame 31 is in contact with the other mounting surface of the lighting board part 20R1.
- the optical axes of the lens members 32 and 33 and the central axis of the field of view of the CCD 26 are aligned with the axis of the illumination board section 20R1 and are held by the illumination board section 20R1. Even in this state, if the cylindrical portion 29a of the holder 29 is slid with respect to the slide portion 31a of the lens frame 31, the distance of the CCD 26 together with the imaging substrate portion 20R2 with respect to the lens members 32 and 33 changes. The focus of the CCD 26 can be adjusted. After the focus adjustment of the CCD 26 is performed, the insulating sealing resin P is filled and cured between the illumination substrate unit 20R1 and the imaging substrate unit 20R2, and the two are held in a connected state.
- the height up to the stepped portion 3Id after the CCD 26 and the holder 29 are assembled is larger than the height of the various electronic components arranged on the front surface of the imaging substrate 20R2.
- the height is higher than the height of the electronic component.
- one mounting face of the switch board section 20R3 is opposed to one mounting face thereof, and the other mounting face of the switch board section 20R3 is further provided with the power supply board section 20R4.
- the button type battery 10 is sandwiched and held between the positive contact member 39 and the negative contact member (not shown) by bending the flexible wiring board portion 20F so that the other mounting surface faces the other.
- the heat-shrinkable tube 44 is provided so as to surround them, and is appropriately heated.
- the button type battery 10 is pressed and held together with the switch board part 20R3 and the power supply board part 20R4.
- an insulating sealing resin P is filled and cured between the imaging substrate unit 20R2 and the switch substrate unit 20R3, and between the power supply substrate unit 20R4 and the transmission substrate unit 20R5, respectively, and cured. Is kept connected.
- each flexible wiring board 20F is perpendicularly attached to each of the rigid wiring board portions 20R having a disk shape from the straight portions 22R.
- each flexible wiring board 20F can be easily and reliably formed along the straight line portion 22R of the portion close to the rigid wiring board 20R. It becomes possible to bend. Since the individual straight portions 22R are formed by cutting off the rigid wiring board portions 20R each having a disk shape, the bending force is reduced, for example, as shown in FIGS. 5 and 6. It is also possible to fit the plate portion 20F in the cut portion.
- the flexible wiring board portion 20F located on the outer peripheral portion of the button-type battery 10 is divided into two by a slit 20FS along the longitudinal direction, so that the button-type battery 10 has a button-type battery as shown in FIGS. 10 and 11. It will closely follow the peripheral surface of the battery 10. As a result, it is possible to prevent a situation where the outer diameter of each rigid wiring board 20R and the outer diameter of the button-type battery 10 are significantly increased by the flexible wiring board 20F.
- the sealed container 100 that houses the button-type battery 10 and the rigid-flex wiring board 20 is configured to include a divided container main body 110 and a tip cover 120.
- the container body 110 has a bottom portion 111 having a substantially hemispherical dome shape, and a substantially cylindrical body portion 112 extending continuously to the bottom portion 111.
- the bottom 111 and the body 112 are integrally formed of a synthetic resin material.
- a synthetic resin material for forming the container body 110 for example, a cycloolefin polymer, polycarbonate, acrylic, polysulfone, or urethane can be used.Polysulfone should be applied, especially when the strength of the container body 110 is considered. U, which is preferred.
- a draft angle is set in the body 112 of the container body 110. It is formed so as to have a slightly larger diameter toward the opening side of the tip. As shown in FIG. 1, the dimensions of the container main body 110 are such that when the rigid-flexible wiring board 20 and the button-type battery 10 that are blocked as the interior member are inserted from the antenna board 20R6 side, they can be accommodated. It is configured so as to minimize the gap with the housed interior member.
- an engagement groove 113 is formed on the inner peripheral surface of the body 112 of the container main body 110, which is located slightly closer to the base end than the opening at the distal end, over the entire circumference.
- the front end cover 120 covers the front side of the lighting board portion 20R1, and includes a dome portion 121 having a substantially hemispherical dome shape, and a dome portion 121. And a dome portion 121 and an engaging portion 122 which are formed integrally from a synthetic resin material as an optical material. Therefore, the front end cover 120 is transparent or translucent, and transmits the illumination light of the light emitting element 23 to the outside and transmits the image illuminated by the illumination light to the inside.
- a cycloolefin polymer As a synthetic resin material for forming the end cover 120, a cycloolefin polymer, polycarbonate, atalyl, polysulfone, or urethane can be used.In particular, considering the optical performance and strength of the end cover 120, It is preferable to apply a cycloolefin polymer or polycarbonate.
- the dome portion 121 has substantially the same outer diameter as the tip outer diameter of the body portion 112 in the container body 110, while the engaging portion 122 has the tip portion of the body portion 112 in the container body 110. It has an outer diameter dimension that can be fitted to the inner circumference, and the outer surface of the dome portion 121 is continuous with the outer surface of the body portion 112 when it is attached to the tip of the container body 110. It is possible to fit the inner periphery of the distal end of the body 112 through the 122.
- the engaging portion 122 of the front cover 120 a portion corresponding to the engaging groove 113 of the container main body 110 is provided with an engaging projection 123 over the entire circumference.
- the engagement protrusion 123 engages with the engagement groove 113 of the container body 110 when the tip cover 120 is attached to the tip of the body 112, whereby the tip cover 120 is accidentally dropped from the container body 110. This is to prevent the situation.
- the inner periphery of the engaging portion 122 is formed to have an inner diameter capable of fitting the illumination board portion 20R1 of the rigid / flexible wiring board 20.
- the tip cover 120 also has a center force of curvature of the dome portion 121 within a predetermined symmetry region.
- a light-transmitting portion 121a is set in a certain range (in a region surrounded by a two-dot chain line in FIG. 1), and a pupil portion 121b is provided on the entire outer periphery of the light-transmitting portion 121a.
- the light transmitting part 121a and the pupil part 121b are parts that define the observation range of the image data with respect to the tip cover 120.
- the translucent portion 121a of the tip cover 120 is formed to have a uniform and uniform thickness.
- the pupil part 121b is formed so as to have a greater thickness than the translucent part 121a, and constitutes a protruding part 124 bulging inward from the inner peripheral surface of the engaging part 122. ing.
- the protruding portion 124 has a contact surface 125 located on the base end side thereof extending in a direction orthogonal to the axis of the distal end cover 120, and makes one mounting surface of the lighting board portion 20R1 contact and engage.
- the inner diameter of the projecting portion 124 is set to be larger than the mounting area of the light emitting element 23 in the lighting board section 20R1, and even when the lighting board section 20R1 is rotated around its axis, the projection 124 does not interfere with the light emitting element 23. I will not.
- the lighting board section 20R1 is previously held at the tip end as shown in FIG. After being kept covered by the cover 120, an adhesive is applied to the inner peripheral surface of the container body 110, and an insulating sealing resin P is applied to the periphery of the rigid-flex circuit board 20 and the button-type battery 10. Then, the interior member of this state is inserted into the interior of the container body 110, and the engagement protrusion 123 of the tip cover 120 may be engaged with the engagement groove 113 of the container body 110.
- the gap between the outer peripheral surface of the rigid flexible wiring board 20 and the button-type battery 10 and the inner peripheral surface of the container body 110 is filled with the sealing resin P,
- the adhesive enters between the inner peripheral surface of the container body 110 and the inner peripheral surface.
- the optical axis of the lens unit 30 is moved to the front cover 120. And the center of the entrance pupil with respect to the lens unit 30 coincides with the center of curvature of the tip cover 120.
- the projection 124 of the tip cover 120 does not interfere with the light emitting element 23 of the illumination board portion 20R1, so that both the shafts of the illumination substrate portion 20R1 and the illumination substrate portion 20R1 do not interfere with each other. There is no need to consider the posture of the mind. Therefore, it is not necessary to adjust the position of the optical system with respect to the incident light at the time of assembling, and the assembling work can be performed extremely easily.
- the adhesive that has infiltrated between the inner peripheral surface of the container body 110 and the outer peripheral surface of the engaging portion 122 of the distal end cover 120 ensures a desired watertightness between each other, and enters the body cavity. Even when the liquid is introduced, there is no danger of liquid such as body fluid entering the closed container 100. In particular, between the front end cover 120 and the front end of the container body 110, the engagement protrusion 123 and the engagement groove 113 are engaged with each other. Even after the processing step, the adhesive between the two does not peel off, so that there is no danger that the interior member will generate heat or short-circuit due to the infiltration of the bodily fluid.
- FIG. 20 is a conceptual diagram for describing a usage example of the capsule endoscope C described above.
- the reed switch 37 is activated, and the button-type battery 10 which is an internal power source is operated. Power supply to the functional circuit via the DCDC converter 40 is continuously turned on.
- each part of the functional circuit is driven by a command from the DSP 25 until the subject is excreted out of the body. It will be possible to get. More specifically, the irradiation light from the light emitting element 23 is applied to the observation range of the subject, such as the stomach, small intestine, and large intestine, through the translucent portion 121a of the tip cover 120, while the translucent portion 12 la of the tip cover 120 is irradiated.
- the reflected light incident through the CCD 26 is coupled to the CCD 26 through the lens unit 30, and the reflected light coupled to the CCD 26 is output as an image signal.
- the image signal output from the CCD 26 is modulated and amplified by the RF unit 42, and then transmitted to the outside from the antenna 43 by radio.
- the image data is sequentially stored as image data in an external storage device 203 such as a compact flash (R) memory.
- the image data stored in the external storage device 203 is visualized on the display 205 through, for example, the computer 204, and is subjected to diagnosis through a doctor or a nurse.
- the optical axis of the lens unit 30 coincides with the axis of the front cover 120, and the center of the entrance pupil with respect to the lens unit 30 is positioned at the front cover.
- all of the incident light from the translucent portion 121a provided in the dome portion 121 of the tip cover 120 is applied to the pixel surface of the CCD 26 by the lens members 32 and 33 of the lens unit 30. Since an image is formed and the light-transmitting portion 121a is formed to have a uniform and uniform thickness, it is possible to obtain extremely good image data.
- the positioning of the optical system with respect to the incident light can be performed without any adjustment work if one mounting surface of the illumination board unit 20R1 is brought into contact with the contact surface 125 of the front cover 120. Since the operation is performed accurately, there is no possibility that the assembly operation may be complicated.
- the dome portion 121 of the distal end cover 120 is closer to the outer periphery than the light transmitting portion 12 la in the dome portion 121.
- the incident light that has passed through 121b can be reliably blocked, and the occurrence of flare in image data can be effectively prevented.
- the lower end of the holder 29 that supports the lens frame 31 that supports the lens members 32 and 33 that are in close contact with the cover glass 28 and forms an image on the CCD 26 is provided.
- the edge force is also formed by extending the contact portion 29c that contacts the outer shape of the cover glass 28, and the contact portion 29c is brought into contact with the outer shape of the cover glass 28, so that the lens frame 31 is fixed to the CCD 26 with a predetermined force. Since the lens frame 31 is positioned at the position, the lens frame 31 can be easily positioned at a predetermined position with respect to the light receiving surface of the CCD 26 in a short time.
- the holder 29 is fixed to the cover glass 28 with a black adhesive and the exposed surface of the cover glass 28 is shielded from light with a black adhesive, it is possible to assemble it with a simple configuration and a work process. , A clear image can be obtained.
- the illumination board unit 20R1 and the imaging board unit 20R2 do not need to be separately connected by a lead wire or the like, and the lighting board unit 20R1 and the imaging board unit 20R2 can be easily assembled as compared with the related art. Monkey
- the contact surface 125 of the protruding portion 124 provided on the distal end cover 120 and the lighting board portion 20R1 abut so as to be relatively rotatable.
- the projecting portion 124 of the front cover 120 does not necessarily need to be formed over the entire circumference, but it is sufficient that the projecting portion 124 abuts at least three places on one mounting surface of the lighting board portion 20R1.
- the rigid flexible wiring board 20 is formed in a straight line by the flexible wiring board section 20F in the order of the illumination board section 20R1, the imaging board section 20R2, the switch board section 20R3, and the power supply board section 20R4.
- the illumination board section 2 0R1, imaging board section 20R2, switch board unit 2 OR @ 3 if Yogu example coplanar as long as it is located in the order of the power supply board portion 2 0R4, They need not necessarily be formed on a straight line.
- the imaging device for an endoscope and the capsule endoscope according to the present invention are configured to acquire an image inside the subject when inserted into the subject. It is useful for an imaging device for an endoscope and a capsule endoscope, and is particularly suitable for an imaging device for an endoscope and a capsule endoscope for acquiring a good in-vivo image.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05703783A EP1707103A4 (en) | 2004-01-19 | 2005-01-18 | IMAGING DEVICE FOR ENDOSCOPE AND CAPSULE ENDOSCOPE |
US11/486,950 US7998059B2 (en) | 2004-01-19 | 2006-07-14 | Endoscopic imaging apparatus and capsule-type endoscope |
US11/872,638 US20080039694A1 (en) | 2004-01-19 | 2007-10-15 | Endoscopic imaging apparatus and capsule-type endoscope |
US11/872,623 US8152713B2 (en) | 2004-01-19 | 2007-10-15 | Capsule endoscope with illumination board section and method of assembling |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004010712A JP4024763B2 (ja) | 2004-01-19 | 2004-01-19 | 内視鏡用撮像装置及び内視鏡用撮像装置の組立方法 |
JP2004-010712 | 2004-01-19 | ||
JP2004-014620 | 2004-01-22 | ||
JP2004014620A JP3993566B2 (ja) | 2004-01-22 | 2004-01-22 | カプセル型内視鏡 |
JP2004017138A JP3981359B2 (ja) | 2004-01-26 | 2004-01-26 | カプセル型内視鏡 |
JP2004-017138 | 2004-01-26 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/486,950 Continuation US7998059B2 (en) | 2004-01-19 | 2006-07-14 | Endoscopic imaging apparatus and capsule-type endoscope |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005067783A1 true WO2005067783A1 (ja) | 2005-07-28 |
Family
ID=34799325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/000546 WO2005067783A1 (ja) | 2004-01-19 | 2005-01-18 | 内視鏡用撮像装置およびカプセル型内視鏡 |
Country Status (3)
Country | Link |
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US (3) | US7998059B2 (ja) |
EP (3) | EP1707103A4 (ja) |
WO (1) | WO2005067783A1 (ja) |
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US8152713B2 (en) | 2012-04-10 |
EP2572626A1 (en) | 2013-03-27 |
EP1707103A1 (en) | 2006-10-04 |
EP2572627A1 (en) | 2013-03-27 |
EP2572626B1 (en) | 2016-03-23 |
US7998059B2 (en) | 2011-08-16 |
US20080039694A1 (en) | 2008-02-14 |
EP1707103A4 (en) | 2010-12-15 |
US20080058601A1 (en) | 2008-03-06 |
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