WO2019026567A1 - Endoscope - Google Patents

Endoscope Download PDF

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Publication number
WO2019026567A1
WO2019026567A1 PCT/JP2018/026057 JP2018026057W WO2019026567A1 WO 2019026567 A1 WO2019026567 A1 WO 2019026567A1 JP 2018026057 W JP2018026057 W JP 2018026057W WO 2019026567 A1 WO2019026567 A1 WO 2019026567A1
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WO
WIPO (PCT)
Prior art keywords
plate
metal member
imaging device
holding frame
endoscope
Prior art date
Application number
PCT/JP2018/026057
Other languages
French (fr)
Japanese (ja)
Inventor
一村　博信
Original Assignee
オリンパス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オリンパス株式会社 filed Critical オリンパス株式会社
Publication of WO2019026567A1 publication Critical patent/WO2019026567A1/en

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    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides

Definitions

  • the present invention relates to an endoscope provided with an imaging device at the distal end of an insertion portion.
  • an endoscope is provided with an imaging device at the tip of an insertion portion that can be inserted into a subject such as a living body or a machine.
  • a subject such as a living body or a machine.
  • WO 2012/124526 discloses a technique for providing a flow path to the above-mentioned metal member.
  • a path of flowing static electricity is formed by bringing a leaf spring contact portion into contact with the side surface of a metal frame covering the outer periphery of the imaging device.
  • a force is generated that pushes the side surface of the imaging device by the contact portion.
  • the imaging device of the endoscope has an elongated shape along the longitudinal direction of the insertion portion in order to reduce the diameter of the insertion portion. Therefore, when a force is applied to the imaging device from the side, that is, a stress deformation that is applied to the optical axis of the imaging device, bending deformation is likely to occur in the imaging device. Bending deformation of the imaging device can be a cause such as peeling of a resin that bonds the glasses together in the imaging device. Therefore, it is desirable for the imaging device of the endoscope to be able to suppress the input of the force that causes the bending deformation.
  • the present invention solves the above-mentioned problems, and an object of the present invention is to improve the electrostatic resistance of the electronic circuit of an imaging device while suppressing the force applied to the imaging device in an endoscope provided with the imaging device.
  • An endoscope includes an objective lens that forms an optical image, an imaging device that converts the optical image into an electrical signal, and a conductive holding frame that holds the objective lens and the imaging device. It is a plate-like member in which an imaging device, a connector part which can be attached and detached to an external device, and an opening are formed, and the holding frame is inserted into the opening and electrically connected to the holding frame.
  • Plate-like metal member non-conductive resin frame member including the holding frame and the plate-like metal member, conductive ground contact portion provided on the connector portion, the plate-like metal member and the plate-like metal member And one or more ground conductor portions electrically connecting the ground contact portion, wherein the portion of the plate-like metal member provided with the opening is the objective lens at the tip end side of the imaging device. Held perpendicular to the optical axis of That.
  • FIG. 1 is a view schematically showing the configuration of the endoscope 1 of the present embodiment.
  • the endoscope 1 has an elongated insertion portion 10 to be inserted into a subject, an operation portion 40 connected to a proximal end 10 b of the insertion portion 10, and a universal cable 90 extending from the operation portion 40.
  • the subject into which the insertion unit 10 is inserted may be a living thing such as a human or the like, or may be a non-living thing such as a machine or a building.
  • the insertion portion 10 is configured by connecting the distal end portion 11, the bending portion 12 and the tubular portion 13 in order from the distal end 10a to the proximal end 10b.
  • the distal end portion 11 is provided with an imaging device 20 for imaging a subject such as the inside of a subject.
  • the imaging device 20 includes an objective lens 21 and an imaging element 22 such as a CCD or a CMOS image sensor.
  • the front end portion 11 is provided with an illumination window (not shown) for emitting light for illuminating a subject.
  • the illumination light emitted from the illumination window is emitted by a light source device which is an external device of the endoscope 1 and travels through a not-shown optical fiber cable inserted into the insertion portion 10 to reach the illumination window.
  • the bending portion 12 bends in response to the movement of the operation lever provided on the operation portion 40. Since the configuration of the bending portion 12 in the endoscope is known, the detailed description will be omitted.
  • the tubular portion 13 is a flexible hollow tubular portion that connects the proximal end of the bending portion 12 and the operation portion 40.
  • the tubular portion 13 may have a rigid form that does not bend along the shape of the gap of the subject into which the insertion portion 10 is inserted, or may follow the shape of the gap of the subject into which the insertion portion 10 is inserted. It may be in a flexible form.
  • An endoscope having a rigid insertion section is generally referred to as a rigid endoscope
  • an endoscope having a flexible insertion section is generally referred to as a flexible endoscope.
  • the rigid endoscope and the flexible endoscope are, for example, defined in the medical field in ISO 86000-1: 2015.
  • the operation unit 40 is a portion held by the user when using the endoscope.
  • an operation lever or the like for performing a bending operation of the bending portion 12 is disposed.
  • the universal cable 90 includes a flexible tube portion 91 and a connector portion 92.
  • the flexible tube portion 91 is a flexible elongated tubular portion through which an electric cable, an optical fiber cable or the like is inserted.
  • the connector portion 92 is a portion for connecting an electric cable, an optical fiber cable or the like to the external device 100 of the endoscope 1.
  • the connector portion 92 includes a plug-like portion including a plurality of electrical contact portions, and can be attached to the receptacle portion 100 a provided in the external device 100.
  • the plurality of electrical contact portions included in the connector portion 92 include one or more ground contact portions 92a.
  • the ground contact portion 92 a is electrically connected to the grounded conductor of the external device 100 in a state where the connector portion 92 is attached to the external device 100.
  • the ground contact portion 92 a is electrically connected to one or a plurality of ground conductor portions 16 made of a conductive material such as metal provided inside the endoscope 1. That is, the ground contact portion 92 a is an electrical contact portion for grounding the ground conductor portion 16 of the endoscope 1 via the external device 100.
  • the ground conductor portion 16 provided in the endoscope 1 is not particularly limited, the ground conductor portion 16 includes an electrostatic conduction cable 17 described later which is inserted into the insertion portion 10. Further, in the ground conductor portion 16, for example, the ground conductor portion 16 includes the bending portion distal end member 12 a of the bending portion 12, the operation wire 12 b and the like.
  • the ground conductor portion 16 may include a frame member in the operation portion 40, a flexible tube disposed in the tubular portion 13, a mesh tube disposed in the universal cable 90, and the like.
  • FIG. 2 is a partial cross-sectional view of the distal end portion 11 and the bending portion 12.
  • the left side is the distal direction
  • the right side is the proximal direction.
  • the resin frame member 30, the imaging device 20, and the plate-like metal member 18 are disposed at the tip end portion 11.
  • the resin frame member 30 is a member exposed to the outside at the tip end 10 a of the insertion portion 10 at the tip end portion 11.
  • the resin frame member 30 is formed of an electrically insulating resin. That is, the resin frame member 30 is nonconductive.
  • the resin frame member 30 has a substantially cylindrical shape, and encloses the imaging device 20 and the plate-like metal member 18.
  • the resin frame member 30 is formed with a circular through hole 30a that opens at the tip 10a.
  • the imaging device 20 is exposed to the outside of the insertion portion 10 through the through hole 30a.
  • a curved portion distal end member 12a constituting the most distal end side of the curved portion 12 is fixed on the proximal end side of the resin frame member 30, a curved portion distal end member 12a constituting the most distal end side of the curved portion 12 is fixed.
  • the curved portion distal end member 12 a has a tubular shape, and is externally fitted to the resin frame member 30. Further, the tips of the plurality of operation wires 12 b are fixed to the inside of the curved portion tip member 12 a.
  • the operation wire 12 b is formed by twisting metal wires and has conductivity.
  • the operation wire 12 b is inserted into the inside of the curved portion 12 and the tubular portion 13 and extends to the operation portion 40.
  • the operation unit 40 is provided with a mechanism for pulling the operation wire 12 b in accordance with the movement of the operation lever.
  • the bending portion 12 bends in response to the pulling of the plurality of operation wires 12 b.
  • the imaging device 20 includes an objective lens 21 that forms an optical image, and an imaging element 22 that converts the optical image into an electrical signal.
  • the objective lens 21 may include a filter, a stop, and the like.
  • the optical axis O of the objective lens 21 is along the longitudinal direction of the distal end portion 11 of the insertion portion 10. That is, in the direction along the optical axis O of the objective lens 21, the object side (subject side) is the tip side of the tip portion 11 and the image side (imaging element side) is the base end side of the tip portion 11.
  • the objective lens 21 and the imaging element 22 are fixed to the holding frame 23.
  • the holding frame 23 is fixed to the resin frame member 30. That is, the objective lens 21 and the imaging element 22 are fixed to the resin frame member 30 via the holding frame 23.
  • the holding frame 23 is made of a conductive material such as metal.
  • the holding frame 23 is a substantially cylindrical member that extends along the longitudinal direction of the distal end portion 11.
  • the tubular holding frame 23 opens in both the distal direction and the proximal direction.
  • An objective lens 21 and an optical axis adjustment glass 26 described later are fixed in the holding frame 23.
  • the optical axis adjustment glass 26 is disposed on the optical axis of the objective lens 21.
  • the optical axis adjustment glass 26 is exposed from the opening in the proximal direction of the holding frame 23 toward the proximal direction.
  • a cover glass 22 b is attached on the light receiving surface 22 a of the imaging element 22.
  • the cover glass 22 b is also referred to as a lid glass or the like.
  • the surface of the lid glass 22b opposite to the light receiving surface 22a is attached to the surface of the optical axis adjustment glass 26 facing the proximal direction.
  • the imaging element 22 is fixed to the holding frame 23 via the optical axis adjustment glass 26 and the cover glass 22 b.
  • the imaging device 22 is disposed on the proximal side of the end of the holding frame 23 in the proximal direction, and the imaging device 22 and the holding frame 23 are separated from each other.
  • the optical axis adjustment glass 26 and the cover glass 22 b have electrical insulation. Therefore, the imaging element 22 and the conductive holding frame 23 are electrically insulated with a predetermined spatial distance and a predetermined creepage distance.
  • An electronic circuit board 27 electrically connected to the imaging device 22 is disposed on the base end side of the imaging device 22. Further, an electric cable 19 extends from the electronic circuit board 27 in the proximal direction. The electrical cable 19 is inserted into the insertion portion 10, the operation portion 40 and the universal cable 90, and electrically connects the electronic circuit board 27 and the electrical contact portion of the connector portion 92. By mounting the connector portion 92 in the external storage 100, the external device and the imaging device 20 are electrically connected. The electronic circuit board 27 and the electric cable 19 are also electrically insulated with respect to the holding frame 23.
  • a columnar portion 23 a and a convex portion 23 b are formed on the outer shape of the holding frame 23.
  • the columnar portion 23 a is inserted into an opening 18 a of a plate-like metal member 18 described later.
  • the columnar portion 23 a is a columnar portion extending along the longitudinal direction of the tip portion 11. The length in the longitudinal direction of the end portion 11 of the columnar portion 23 a is longer than the thickness in the longitudinal direction of the end portion 11 of the plate-like metal member 18.
  • the convex portion 23 b is disposed at an end of the columnar portion 23 a in the proximal direction, and protrudes from the outer peripheral surface of the holding frame 23 in a direction substantially orthogonal to the extending direction of the columnar portion 23 a.
  • the convex part 23 b abuts on the plate-like metal member 18.
  • the holding frame 23 is formed of two cylindrical members of the lens barrel 24 and the relay cylinder 25.
  • FIG. 3 shows an exploded perspective view of the holding frame 23.
  • the lens barrel 24 and the relay cylinder 25 are made of a conductive material such as metal as described above.
  • the lens barrel 24 is a cylindrical member that holds the objective lens 21.
  • the relay cylinder 25 holds the optical axis adjustment glass 26. That is, the imaging element 22 is fixed to the relay cylinder 25.
  • the end of the lens barrel 24 in the proximal direction has a dimension such that it can be fitted into the relay cylinder 25 with a predetermined gap.
  • the outer diameter of the end of the lens barrel 24 in the front end direction has a dimension such that it can be fitted into the through hole 30 a of the resin frame member 30 with a predetermined gap.
  • the optical axis O of the objective lens 21 is substantially parallel to the central axis of the through hole 30a which is circular.
  • the lens barrel 24 is fixed in the through hole 30 a by the fixing resin 31.
  • the fixing resin 31 is a thermosetting resin, an ultraviolet curable resin, or the like.
  • the surface of the lens barrel 24 exposed to the outside of the insertion portion 10 in the through hole 30 a is covered with the fixing resin 31. Therefore, the lens barrel 24 is electrically insulated from the outside of the insertion portion 10.
  • the relay cylinder 25 shown in FIG. 3 is a substantially cylindrical member.
  • the outer shape of the relay cylinder 25 constitutes the columnar portion 23 a and the convex portion 23 b. Therefore, in the present embodiment, the columnar portion 23a has a cylindrical outer shape.
  • the convex part 23b protrudes in the radial direction of the columnar part 23a which is a column shape.
  • the diameter of the columnar portion 23 a is smaller than the maximum diameter of the lens barrel 24.
  • the diameter of the columnar portion 23 a may be equal to or larger than the maximum diameter of the lens barrel 24.
  • the plate-like metal member 18 is a plate-like member having an opening 18 a which is a through hole through which the columnar portion 23 a of the holding frame 23 is inserted.
  • the plate-like metal member 18 is made of a conductive material such as metal.
  • the plate-like metal member 18 of the present embodiment is a foil-like metal plate having a thickness of about 100 ⁇ m to 300 ⁇ m. The thickness of the plate-like metal member 18 may be less than 100 ⁇ m.
  • the opening 18 a penetrates the plate-like metal member 18 in the thickness direction.
  • the opening 18a may have a shape in which the columnar portion 23a is press-fitted into the inside, or may have a shape in which the columnar portion 23a is inserted with a gap. Further, in the present embodiment, the opening 18a is a circular hole as an example, but the opening 18a may be a polygon such as a rectangle or a regular hexagon.
  • the plate-like metal member 18 is substantially orthogonal to the longitudinal direction of the distal end portion 11 in a state where the columnar portion 23 a is inserted. That is, the portion of the plate-like metal member 18 where the opening 18a is provided is held substantially perpendicular to the optical axis O of the objective lens 21 in the state where the columnar portion 23a is inserted.
  • the surface 18 b facing the base end side of the plate-like metal member 18 abuts on the convex portion 23 b in a state where the columnar portion 23 a is inserted.
  • the configuration for causing the plate-like metal member 18 to abut on the protrusion 23 b is not particularly limited.
  • the plate-like metal member 18 is held at a position abutted on the protrusion 23 b by an adhesive or soldering.
  • the plate-like metal member 18 Since the holding frame 23 is spaced apart from the imaging device 22 and positioned in the distal direction more than the imaging device 22, the plate-like metal member 18 is in a state where the plate-like metal member 18 abuts on the convex portion 23 b It is positioned more distal than the image sensor 22.
  • the plate-like metal member 18 is electrically connected to the ground contact portion 92 a of the ground conductor portion 16 or the connector portion 92.
  • the ground conductor portion 16 is a conductive member electrically connected to the ground contact portion 92 a of the connector portion 92.
  • the plate-like metal member 18 is electrically connected to the ground contact portion 92 a of the connector portion 92 through the electrostatic conduction cable 17 which is the ground conductor portion 16.
  • the electrostatic conduction cable 17 is a covered electric wire inserted into the insertion portion 10 and the operation portion 40, and the tip of the conductor wire is connected to the plate-like metal member 18, and the inside of the operation portion 40 is It is connected to the metal member made of metal provided in.
  • the metal member is electrically connected to the ground contact portion 92a.
  • the connection between the conductor wire of the electrostatic conduction cable 17 and the plate-like metal member 18 and the metal member may be performed by, for example, soldering, a conductive adhesive, or may be performed by, for example, fastening with a screw.
  • the endoscope 1 includes an objective lens 21 for forming an optical image, an image pickup device 22 for converting an optical image into an electric signal, and conductive holding for holding the objective lens 21 and the image pickup device 22
  • An imaging device 20 including a frame 23 and a nonconductive resin frame member 30 including the imaging device 20 are provided.
  • the lens barrel 24 constituting the holding frame 23 which is conductive is inserted into the through hole 30 a of the resin frame member 30 which is non-conductive.
  • the lens barrel 24 is electrically insulated from the outside of the insertion portion 10 by being covered with the fixing resin 31, but since the thickness of the fixing resin 31 is thinner than the resin frame member 30,
  • the lens barrel 24 is a portion where electrostatic discharge from the outside of the insertion portion 10 tends to flow compared to the other portions of the imaging device 20.
  • the holding frame 23 of the imaging device 20 is electrically connected to the plate-like metal member 18 by being inserted into the opening 18 a of the conductive plate-like metal member 18.
  • the plate-like metal member 18 is electrically connected to the ground contact portion 92 a via the ground conductor portion 16.
  • the plate-like metal member 18 is disposed in the distal direction of the imaging device 22 of the imaging device 20. Therefore, in the endoscope 1 of the present embodiment, even if the electrostatic discharge falls to the lens barrel 24, the static electricity does not flow to the imaging element 22, and the plate-like metal member 18, the ground conductor portion 16 and the ground contact portion It flows to the bypass route side configured by 92a. Therefore, in the endoscope 1 of the present embodiment, the electrostatic resistance of the electronic circuit of the imaging device 20 can be improved.
  • the plate-like metal member 18 is held perpendicular to the longitudinal direction of the imaging device 20. For this reason, the plate-like metal member 18 does not apply a force that causes the imaging device 20 to cause bending deformation. Moreover, in the endoscope 1 of the present embodiment, the thickness direction of the plate-like metal member 18 substantially coincides with the longitudinal direction of the distal end portion 11. Therefore, in the present embodiment, it is possible to suppress the influence of arranging the plate-like metal member 18 to increase the size of the tip 11 in the longitudinal direction.
  • the endoscope 1 of the present embodiment can improve the electrostatic resistance of the electronic circuit of the imaging device 20 while suppressing the force applied to the imaging device 20.
  • the modification of the plate-shaped metal member 18 of this embodiment is shown in FIG.
  • the plate-like metal member 18 of this modification is different from the above-described embodiment in that a notch 18b is formed from the outer edge to the inner peripheral surface of the opening 18a. That is, in the present modification, the inner peripheral surface of the opening 18 a is not closed, and is connected to the outer peripheral surface of the plate-like metal member 18.
  • the plate-like metal member 18 of the present embodiment is substantially C-shaped.
  • the plate-like metal member 18 of this modification can allow the columnar portion 23a to be inserted into the opening 18a via the notch 18b.
  • the plate-like metal member 18 is attached to and detached from the holding frame 23 without removing the lens barrel 24. be able to.
  • FIG. 5 shows a cross-sectional view of the distal end portion 11 of the insertion portion 10 of the endoscope 1 of the present embodiment. Moreover, in FIG. 6, the perspective view of the plate-shaped metal member 18 of this embodiment is shown.
  • the present embodiment differs from the first embodiment in the configuration of the plate-like metal member 18.
  • the plate-like metal member 18 of the present embodiment includes a plate spring portion 18 c that generates a force that urges the plate-like metal member 18 in the direction along the optical axis O toward the convex portion 23 b of the holding frame 23.
  • the plate spring portion 18c is formed by bending a portion extending in a direction away from the outer edge portion of the plate-like metal member 18 so as to be folded back. As shown in FIG. 5, the plate spring portion 18 c is disposed in the tip portion 11 in the direction (tip direction) opposite to the surface of the plate-like metal member 18 that abuts on the protrusion 23 b.
  • the flat spring portion 18c abuts on the inner peripheral surface facing the convex portion 23b of the resin frame member 30 in the direction along the optical axis O, whereby the plate-like metal member 18 is moved to the optical axis O toward the convex portion 23b. It generates a biasing force along the direction.
  • the plate-like metal member 18 can be held at a position in contact with the convex portion 23 b without using an adhesive or soldering. Further, since the force applied to the imaging device 20 by the plate spring portion 18c is in the direction along the optical axis O, input of a force that causes the imaging device 20 to cause bending deformation does not occur in this embodiment as well.
  • the plate-like-part 18 of this embodiment may also have the notch 18b which extends from an outer edge part to the opening part 18a like the modification of 1st Embodiment shown in FIG.
  • FIG. 7 shows a cross-sectional view of the distal end portion 11 of the insertion portion 10 of the endoscope 1 of the present embodiment.
  • the present embodiment differs from the first embodiment in the configuration of the plate-like metal member 18.
  • the plate-like metal member 18 of the present embodiment includes an extending portion 18 d that abuts on the ground conductor portion 16. As shown in FIG. 7, the extending portion 18 d extends along the optical axis O in the proximal direction from the portion where the opening 18 a of the plate-like metal member 18 is formed. The proximal end of the extension 18 d abuts on the ground conductor 16.
  • the end of the extension 18 d in the proximal direction is in contact with the curved portion distal end member 12 a which is the ground conductor 16.
  • the end of the extension 18 d in the proximal direction may be in contact with the operation wire 12 b which is the ground conductor 16.
  • the endoscope 1 of the present embodiment can improve the electrostatic resistance of the electronic circuit of the imaging device 20 while suppressing the force applied to the imaging device 20.
  • the plate-like-part 18 of this embodiment may also have the notch 18b which extends from an outer edge part to the opening part 18a like the modification of 1st Embodiment shown in FIG.
  • the plate-like portion 18 of the present embodiment attaches the plate-like metal member 18 in the direction along the optical axis O toward the convex portion 23 b of the holding frame 23. You may provide the leaf
  • FIG. 8 shows a cross-sectional view of the distal end portion 11 of the insertion portion 10 of the endoscope 1 of the present embodiment.
  • the present embodiment differs from the first embodiment in the configurations of the resin frame member 30 and the plate-like metal member 18.
  • a conductive film 30 b which is a thin film made of a conductive material is formed on a part or the whole of the surface exposed to the internal space of the insertion portion 10.
  • the conductive film 30 b is a metal film formed by, for example, vapor deposition or electroplating.
  • the conductive film 30 b is not exposed to the outer surface of the insertion portion 10.
  • the conductive film 30 b is in contact with the curved portion distal end member 12 a which is the ground conductor portion 16 in contact with the resin frame member 30.
  • the plate-like metal member 18 of the present embodiment is provided with an extension 18 e that abuts on the conductive film 30 b. As shown in FIG. 8, the extension 18 e extends in the direction orthogonal to the optical axis O from the portion where the opening 18 a of the plate-like metal member 18 is formed. That is, the part in which the opening part 18a of the plate-shaped metal member 18 was formed, and the extension part 18e are located on the same plane.
  • the static electricity when static electricity is applied to the lens barrel 24, the static electricity does not flow to the imaging element 22, and the plate-like metal member, the ground conductor portion 16 and the ground contact It flows to the bypass route side configured by the unit 92a.
  • the plate-like portion 18 is a thin metal foil having a thickness of 100 ⁇ m or less, the plate-like metal member 18 does not apply a force that causes the imaging device 20 to generate bending deformation.
  • the endoscope 1 of the present embodiment can improve the electrostatic resistance of the electronic circuit of the imaging device 20 while suppressing the force applied to the imaging device 20.
  • the plate-like-part 18 of this embodiment may also have the notch 18b which extends from an outer edge part to the opening part 18a like the modification of 1st Embodiment shown in FIG.
  • the plate-like portion 18 of the present embodiment attaches the plate-like metal member 18 in the direction along the optical axis O toward the convex portion 23 b of the holding frame 23. You may provide the leaf

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Abstract

This endoscope comprises: an imaging device including an objective lens, an imaging element, and a conductive holding frame for holding the objective lens and the imaging element; a connector unit detachable from an external device; a plate-shaped metal member having an opening formed therein, the plate-shaped metal member being electrically connected to the holding frame by the holding frame being inserted into the opening; a non-conductive resin frame member housing the holding frame and the plate-shaped metal member; a conductive ground contact portion provided to the connector unit; and one or a plurality of ground conductor portions electrically connecting the plate-shaped metal member and the ground contact portion. A region of the plate-shaped metal member in which the opening is provided is held perpendicularly to the optical axis of the objective lens on the distal end side of the imaging element.

Description

内視鏡Endoscope
　本発明は、挿入部の先端部に撮像装置を備える内視鏡に関する。 BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an endoscope provided with an imaging device at the distal end of an insertion portion.
　内視鏡は、例えば日本国特開２００２－１９１５５６号公報に開示されているように、生体や機械等の被検体内に挿入可能な挿入部の先端部に撮像装置を備えた形態のものが知られている。 For example, as disclosed in Japanese Patent Application Laid-Open No. 2002-191556, an endoscope is provided with an imaging device at the tip of an insertion portion that can be inserted into a subject such as a living body or a machine. Are known.
　また、このような内視鏡において、挿入部への静電気の印加による撮像装置の電子回路への放電の発生を防止するために、挿入部に印加された静電気を撮像素子側に通さずに接地された金属部材に流す経路を設ける技術が国際公開２０１２／１２４５２６号公報に開示されている。国際公開２０１２／１２４５２６号公報に開示の技術では、撮像装置の外周を覆う金属製の枠の側面に板バネ状の接点部を当接させることにより、静電気を流す経路を形成している。 Further, in such an endoscope, in order to prevent the generation of discharge to the electronic circuit of the imaging device due to the application of the static electricity to the insertion portion, the static electricity applied to the insertion portion is grounded without passing through the imaging element side. WO 2012/124526 discloses a technique for providing a flow path to the above-mentioned metal member. In the technology disclosed in WO 2012/124526, a path of flowing static electricity is formed by bringing a leaf spring contact portion into contact with the side surface of a metal frame covering the outer periphery of the imaging device.
　国際公開２０１２／１２４５２６号公報に開示の技術では、接点部による撮像装置の側面を押す力が発生する。一般に、内視鏡の撮像装置は、挿入部を細径化するために、挿入部の長手方向に沿って細長な形状である。よって、撮像装置に対して側面から押す力、すなわち撮像装置の光軸に対して煽るような応力変形が加えられた場合には、撮像装置に曲げ変形が生じやすい。撮像装置の曲げ変形は、撮像装置内においてガラス同士を接着する樹脂の剥離等の原因となり得る。したがって、内視鏡の撮像装置には、曲げ変形を生じさせるような力の入力が抑えられることが望まれる。 In the technology disclosed in WO 2012/124526, a force is generated that pushes the side surface of the imaging device by the contact portion. In general, the imaging device of the endoscope has an elongated shape along the longitudinal direction of the insertion portion in order to reduce the diameter of the insertion portion. Therefore, when a force is applied to the imaging device from the side, that is, a stress deformation that is applied to the optical axis of the imaging device, bending deformation is likely to occur in the imaging device. Bending deformation of the imaging device can be a cause such as peeling of a resin that bonds the glasses together in the imaging device. Therefore, it is desirable for the imaging device of the endoscope to be able to suppress the input of the force that causes the bending deformation.
　本発明は前述した問題を解決するものであり、撮像装置を備える内視鏡において、撮像装置に加えられる力を抑制しながら、撮像装置の電子回路の静電気耐性を向上させることを目的とする。 The present invention solves the above-mentioned problems, and an object of the present invention is to improve the electrostatic resistance of the electronic circuit of an imaging device while suppressing the force applied to the imaging device in an endoscope provided with the imaging device.
　本発明の一態様による内視鏡は、光学像を形成する対物レンズ、前記光学像を電気信号へ変換する撮像素子、および前記対物レンズと前記撮像素子を保持する導電性の保持枠、を備える撮像装置と、外部装置に着脱可能なコネクタ部と、開口部が形成された板状の部材であって、前記開口部へ前記保持枠が挿通されることで前記保持枠と電気的に接続された板状金属部材と、前記保持枠および前記板状金属部材を内包する非導電性の樹脂枠部材と、前記コネクタ部に設けられた導電性の接地接点部と、前記板状金属部材および前記接地接点部を電気的に接続する１つまたは複数の接地導体部と、を備え、前記板状金属部材の前記開口部が設けられた部位は、前記撮像素子よりも先端側において、前記対物レンズの光軸に対して垂直に保持される。 An endoscope according to one aspect of the present invention includes an objective lens that forms an optical image, an imaging device that converts the optical image into an electrical signal, and a conductive holding frame that holds the objective lens and the imaging device. It is a plate-like member in which an imaging device, a connector part which can be attached and detached to an external device, and an opening are formed, and the holding frame is inserted into the opening and electrically connected to the holding frame. Plate-like metal member, non-conductive resin frame member including the holding frame and the plate-like metal member, conductive ground contact portion provided on the connector portion, the plate-like metal member and the plate-like metal member And one or more ground conductor portions electrically connecting the ground contact portion, wherein the portion of the plate-like metal member provided with the opening is the objective lens at the tip end side of the imaging device. Held perpendicular to the optical axis of That.
第１の実施形態の内視鏡の構成を概略的に示す図である。It is a figure showing roughly the composition of the endoscope of a 1st embodiment. 第１の実施形態の挿入部の先端部の断面図である。It is sectional drawing of the front-end | tip part of the insertion part of 1st Embodiment. 第１の実施形態の撮像装置の分解斜視図であるIt is an exploded perspective view of an imaging device of a 1st embodiment. 第１の実施形態の板状金属部材の変形例を示す図である。It is a figure which shows the modification of the plate-shaped metal member of 1st Embodiment. 第２の実施形態の挿入部の先端部の断面図である。It is sectional drawing of the front-end | tip part of the insertion part of 2nd Embodiment. 第２の実施形態の板状金属部材の斜視図である。It is a perspective view of the plate-shaped metal member of 2nd Embodiment. 第３の実施形態の挿入部の先端部の断面図である。It is sectional drawing of the front-end | tip part of the insertion part of 3rd Embodiment. 第４の実施形態の挿入部の先端部の断面図である。It is sectional drawing of the front-end | tip part of the insertion part of 4th Embodiment.
　以下に、本発明の好ましい形態について図面を参照して説明する。なお、以下の説明に用いる各図においては、各構成要素を図面上で認識可能な程度の大きさとするため、構成要素毎に縮尺を異ならせてあるものであり、本発明は、これらの図に記載された構成要素の数量、構成要素の形状、構成要素の大きさの比率、及び各構成要素の相対的な位置関係のみに限定されるものではない。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the drawings used in the following description, the scale of each component is different in order to make each component have a size that can be recognized in the drawings, and the present invention is not limited to these drawings. The present invention is not limited only to the number of components described in the above, the shape of the components, the ratio of the size of the components, and the relative positional relationship between the components.
（第１の実施形態）　
　図１は、本実施形態の内視鏡１の構成を概略的に示す図である。内視鏡１は、被検体内に挿入される細長の形状である挿入部１０と、前記挿入部１０の基端１０ｂに連接された操作部４０と、操作部４０から延出するユニバーサルケーブル９０と、を備える。なお、挿入部１０が挿入される被検体は、人等の生物であってもよいし、機械や建築物等の非生物であってもよい。 First Embodiment
FIG. 1 is a view schematically showing the configuration of the endoscope 1 of the present embodiment. The endoscope 1 has an elongated insertion portion 10 to be inserted into a subject, an operation portion 40 connected to a proximal end 10 b of the insertion portion 10, and a universal cable 90 extending from the operation portion 40. And. The subject into which the insertion unit 10 is inserted may be a living thing such as a human or the like, or may be a non-living thing such as a machine or a building.
　挿入部１０は、先端１０ａから基端１０ｂに向かって順に、先端部１１、湾曲部１２および管状部１３が連接されて構成されている。 The insertion portion 10 is configured by connecting the distal end portion 11, the bending portion 12 and the tubular portion 13 in order from the distal end 10a to the proximal end 10b.
　先端部１１には、詳しくは後述するが、被検体内等の被写体を撮像する撮像装置２０が配設されている。撮像装置２０は、対物レンズ２１と、ＣＣＤやＣＭＯＳイメージセンサ等の撮像素子２２とを備える。 Although described in detail later, the distal end portion 11 is provided with an imaging device 20 for imaging a subject such as the inside of a subject. The imaging device 20 includes an objective lens 21 and an imaging element 22 such as a CCD or a CMOS image sensor.
　また、先端部１１には、被写体を照明する光を出射する図示しない照明窓が設けられている。照明窓から出射される照明光は、内視鏡１の外部装置である光源装置により発せられ、挿入部１０内に挿通された図示しない光ファイバケーブルを伝わって照明窓に達する。 Further, the front end portion 11 is provided with an illumination window (not shown) for emitting light for illuminating a subject. The illumination light emitted from the illumination window is emitted by a light source device which is an external device of the endoscope 1 and travels through a not-shown optical fiber cable inserted into the insertion portion 10 to reach the illumination window.
　湾曲部１２は、操作部４０に設けられた操作レバーの動きに応じて湾曲する。内視鏡における湾曲部１２の構成は公知であるため、詳細な説明は省略する。 The bending portion 12 bends in response to the movement of the operation lever provided on the operation portion 40. Since the configuration of the bending portion 12 in the endoscope is known, the detailed description will be omitted.
　管状部１３は、湾曲部１２の基端と、操作部４０とを連結する可撓性を有する中空の管状の部位である。管状部１３は、挿入部１０が挿入される被検体の隙間の形状に沿うように曲がらない硬性な形態であってもよいし、挿入部１０が挿入される被検体の隙間の形状に沿うように曲がる軟性な形態であってもよい。挿入部が硬性な形態の内視鏡は一般に硬性内視鏡と称され、挿入部が軟性な形態の内視鏡は一般に軟性内視鏡と称される。硬性内視鏡および軟性内視鏡については、例えば医療分野ではＩＳＯ８６００－１：２０１５に定義されている。 The tubular portion 13 is a flexible hollow tubular portion that connects the proximal end of the bending portion 12 and the operation portion 40. The tubular portion 13 may have a rigid form that does not bend along the shape of the gap of the subject into which the insertion portion 10 is inserted, or may follow the shape of the gap of the subject into which the insertion portion 10 is inserted. It may be in a flexible form. An endoscope having a rigid insertion section is generally referred to as a rigid endoscope, and an endoscope having a flexible insertion section is generally referred to as a flexible endoscope. The rigid endoscope and the flexible endoscope are, for example, defined in the medical field in ISO 86000-1: 2015.
　操作部４０は、内視鏡の使用時において使用者が把持する部位である。操作部４０には、湾曲部１２の湾曲操作を行う操作レバー等が配設されている。 The operation unit 40 is a portion held by the user when using the endoscope. In the operation unit 40, an operation lever or the like for performing a bending operation of the bending portion 12 is disposed.
　ユニバーサルケーブル９０は、可撓管部９１と、コネクタ部９２と、を備える。可撓管部９１は、可撓性を有する細長の管状の部位であり、内部に電気ケーブルや光ファイバケーブル等が挿通されている。 The universal cable 90 includes a flexible tube portion 91 and a connector portion 92. The flexible tube portion 91 is a flexible elongated tubular portion through which an electric cable, an optical fiber cable or the like is inserted.
　コネクタ部９２は、電気ケーブルや光ファイバケーブル等を、内視鏡１の外部装置１００に接続する部位である。コネクタ部９２は、複数の電気接点部を備えるプラグ状の部位を備え、外部装置１００に設けられたレセプタクル部１００ａに装着することができる。 The connector portion 92 is a portion for connecting an electric cable, an optical fiber cable or the like to the external device 100 of the endoscope 1. The connector portion 92 includes a plug-like portion including a plurality of electrical contact portions, and can be attached to the receptacle portion 100 a provided in the external device 100.
　コネクタ部９２が備える複数の電気接点部には、１つまたは複数の接地接点部９２ａが含まれている。接地接点部９２ａは、コネクタ部９２が外部装置１００に装着された状態において、外部装置１００の接地された導体に電気的に接続される。 The plurality of electrical contact portions included in the connector portion 92 include one or more ground contact portions 92a. The ground contact portion 92 a is electrically connected to the grounded conductor of the external device 100 in a state where the connector portion 92 is attached to the external device 100.
　接地接点部９２ａは、内視鏡１の内部に設けられた金属等の導電性の材料からなる１つまたは複数の接地導体部１６に電気的に接続されている。すなわち、接地接点部９２ａは、内視鏡１の接地導体部１６を、外部装置１００を介して接地するための電気接点部である。 The ground contact portion 92 a is electrically connected to one or a plurality of ground conductor portions 16 made of a conductive material such as metal provided inside the endoscope 1. That is, the ground contact portion 92 a is an electrical contact portion for grounding the ground conductor portion 16 of the endoscope 1 via the external device 100.
　内視鏡１が備える接地導体部１６は特に限定されるものではないが、接地導体部１６は、挿入部１０内に挿通されている後述する静電気導通ケーブル１７を含む。また、接地導体部１６は、例えば接地導体部１６は、湾曲部１２の湾曲部先端部材１２ａや操作ワイヤ１２ｂ等を含む。また、接地導体部１６は、操作部４０内のフレーム部材、管状部１３に配設された蛇管、ユニバーサルケーブル９０に配設された網管、等を含んでいてもよい。 Although the ground conductor portion 16 provided in the endoscope 1 is not particularly limited, the ground conductor portion 16 includes an electrostatic conduction cable 17 described later which is inserted into the insertion portion 10. Further, in the ground conductor portion 16, for example, the ground conductor portion 16 includes the bending portion distal end member 12 a of the bending portion 12, the operation wire 12 b and the like. The ground conductor portion 16 may include a frame member in the operation portion 40, a flexible tube disposed in the tubular portion 13, a mesh tube disposed in the universal cable 90, and the like.
　次に、先端部１１の構成の詳細を説明する。図２は、先端部１１および湾曲部１２の部分断面図である。図２において、図面に正対して左側が、先端方向であり、右側が基端方向である。図２に示すように、先端部１１には、樹脂枠部材３０、撮像装置２０、板状金属部材１８が配設されている。 Next, details of the configuration of the distal end portion 11 will be described. FIG. 2 is a partial cross-sectional view of the distal end portion 11 and the bending portion 12. In FIG. 2, the left side is the distal direction, and the right side is the proximal direction. As shown in FIG. 2, the resin frame member 30, the imaging device 20, and the plate-like metal member 18 are disposed at the tip end portion 11.
　樹脂枠部材３０は、先端部１１において、挿入部１０の先端１０ａにおいて外側に露出する部材である。樹脂枠部材３０は、電気絶縁性の樹脂により形成されている。すなわち、樹脂枠部材３０は非導電性である。樹脂枠部材３０は、略筒状の形状を有しており、撮像装置２０および板状金属部材１８を内包する。 The resin frame member 30 is a member exposed to the outside at the tip end 10 a of the insertion portion 10 at the tip end portion 11. The resin frame member 30 is formed of an electrically insulating resin. That is, the resin frame member 30 is nonconductive. The resin frame member 30 has a substantially cylindrical shape, and encloses the imaging device 20 and the plate-like metal member 18.
　樹脂枠部材３０には、先端１０ａにおいて開口する円形の貫通孔３０ａが形成されている。撮像装置２０は、貫通孔３０ａを介して挿入部１０の外側に露出する。 The resin frame member 30 is formed with a circular through hole 30a that opens at the tip 10a. The imaging device 20 is exposed to the outside of the insertion portion 10 through the through hole 30a.
　樹脂枠部材３０の基端側には、湾曲部１２の最も先端側を構成する湾曲部先端部材１２ａが固定されている。湾曲部先端部材１２ａは、筒状の形状を有しており、樹脂枠部材３０に外嵌している。また、湾曲部先端部材１２ａの内側には、複数の操作ワイヤ１２ｂの先端が固定されている。操作ワイヤ１２ｂは、金属製の素線を撚り合わせて形成されたものであり、導電性を有する。 On the proximal end side of the resin frame member 30, a curved portion distal end member 12a constituting the most distal end side of the curved portion 12 is fixed. The curved portion distal end member 12 a has a tubular shape, and is externally fitted to the resin frame member 30. Further, the tips of the plurality of operation wires 12 b are fixed to the inside of the curved portion tip member 12 a. The operation wire 12 b is formed by twisting metal wires and has conductivity.
　操作ワイヤ１２ｂは、湾曲部１２および管状部１３の内側を挿通され、操作部４０にまで延出している。操作部４０には、操作レバーの動きに応じて操作ワイヤ１２ｂを牽引する機構が設けられている。湾曲部１２は、複数の操作ワイヤ１２ｂの牽引に応じて湾曲する。 The operation wire 12 b is inserted into the inside of the curved portion 12 and the tubular portion 13 and extends to the operation portion 40. The operation unit 40 is provided with a mechanism for pulling the operation wire 12 b in accordance with the movement of the operation lever. The bending portion 12 bends in response to the pulling of the plurality of operation wires 12 b.
　撮像装置２０は、光学像を形成する対物レンズ２１と、光学像を電気信号に変換する撮像素子２２と、を備える。対物レンズ２１は、フィルタや絞り等を含んでいてもよい。対物レンズ２１の光軸Ｏは、挿入部１０の先端部１１における長手方向に沿っている。すなわち、対物レンズ２１の光軸Ｏに沿う方向に関し、物体側（被写体側）が先端部１１の先端側であり、像側（撮像素子側）が先端部１１の基端側である。 The imaging device 20 includes an objective lens 21 that forms an optical image, and an imaging element 22 that converts the optical image into an electrical signal. The objective lens 21 may include a filter, a stop, and the like. The optical axis O of the objective lens 21 is along the longitudinal direction of the distal end portion 11 of the insertion portion 10. That is, in the direction along the optical axis O of the objective lens 21, the object side (subject side) is the tip side of the tip portion 11 and the image side (imaging element side) is the base end side of the tip portion 11.
　対物レンズ２１および撮像素子２２は、保持枠２３に固定されている。保持枠２３は、樹脂枠部材３０に固定されている。すなわち、対物レンズ２１および撮像素子２２は、保持枠２３を介して樹脂枠部材３０に固定されている。保持枠２３は、金属等の導電性を有する材料からなる。 The objective lens 21 and the imaging element 22 are fixed to the holding frame 23. The holding frame 23 is fixed to the resin frame member 30. That is, the objective lens 21 and the imaging element 22 are fixed to the resin frame member 30 via the holding frame 23. The holding frame 23 is made of a conductive material such as metal.
　保持枠２３は、先端部１１の長手方向に沿って延在する略円筒状の部材である。筒状である保持枠２３は、先端方向および基端方向の両方向に開口している。保持枠２３内には、対物レンズ２１および後述する光軸調整ガラス２６が固定されている。 The holding frame 23 is a substantially cylindrical member that extends along the longitudinal direction of the distal end portion 11. The tubular holding frame 23 opens in both the distal direction and the proximal direction. An objective lens 21 and an optical axis adjustment glass 26 described later are fixed in the holding frame 23.
　光軸調整ガラス２６は、対物レンズ２１の光軸上に配置されている。また、光軸調整ガラス２６は、保持枠２３の基端方向の開口から基端方向に向かって露出している。 The optical axis adjustment glass 26 is disposed on the optical axis of the objective lens 21. The optical axis adjustment glass 26 is exposed from the opening in the proximal direction of the holding frame 23 toward the proximal direction.
　撮像素子２２の受光面２２ａ上には、カバーガラス２２ｂが貼着されている。カバーガラス２２ｂは、リッドガラス等とも称される。リッドガラス２２ｂの、受光面２２ａとは反対側の面は、光軸調整ガラス２６の基端方向に向く面に貼着されている。 A cover glass 22 b is attached on the light receiving surface 22 a of the imaging element 22. The cover glass 22 b is also referred to as a lid glass or the like. The surface of the lid glass 22b opposite to the light receiving surface 22a is attached to the surface of the optical axis adjustment glass 26 facing the proximal direction.
　すなわち、撮像素子２２は、光軸調整ガラス２６およびカバーガラス２２ｂを介して、保持枠２３に固定されている。ここで、撮像素子２２は、保持枠２３の基端方向の端よりも基端側に配置されており、撮像素子２２と保持枠２３とは離間している。また、光軸調整ガラス２６およびカバーガラス２２ｂは、電気絶縁性を有している。したがって、撮像素子２２と、導電性を有する保持枠２３とは、所定の空間距離および所定の沿面距離を有して電気的に絶縁されている。 That is, the imaging element 22 is fixed to the holding frame 23 via the optical axis adjustment glass 26 and the cover glass 22 b. Here, the imaging device 22 is disposed on the proximal side of the end of the holding frame 23 in the proximal direction, and the imaging device 22 and the holding frame 23 are separated from each other. The optical axis adjustment glass 26 and the cover glass 22 b have electrical insulation. Therefore, the imaging element 22 and the conductive holding frame 23 are electrically insulated with a predetermined spatial distance and a predetermined creepage distance.
　撮像素子２２の基端側には、撮像素子２２に電気的に接続された電子回路基板２７が配設されている。また、電子回路基板２７からは、基端方向に向かって電気ケーブル１９が延出している。電気ケーブル１９は、挿入部１０、操作部４０およびユニバーサルケーブル９０内に挿通されており、電子回路基板２７とコネクタ部９２の電気接点部とを電気的に接続する。コネクタ部９２を外部蔵置１００に装着することにより、外部装置と撮像装置２０とが電気的に接続される。電子回路基板２７および電気ケーブル１９も、保持枠２３に対して電気的に絶縁されている。 An electronic circuit board 27 electrically connected to the imaging device 22 is disposed on the base end side of the imaging device 22. Further, an electric cable 19 extends from the electronic circuit board 27 in the proximal direction. The electrical cable 19 is inserted into the insertion portion 10, the operation portion 40 and the universal cable 90, and electrically connects the electronic circuit board 27 and the electrical contact portion of the connector portion 92. By mounting the connector portion 92 in the external storage 100, the external device and the imaging device 20 are electrically connected. The electronic circuit board 27 and the electric cable 19 are also electrically insulated with respect to the holding frame 23.
　保持枠２３の外形には、柱状部２３ａおよび凸部２３ｂが形成されている。柱状部２３ａは、後述する板状金属部材１８の開口部１８ａ内に挿通される。柱状部２３ａは、先端部１１の長手方向に沿って延在する柱形状の部位である。柱状部２３ａの先端部１１の長手方向についての長さは、板状金属部材１８の先端部１１の長手方向についての厚さよりも長い。 A columnar portion 23 a and a convex portion 23 b are formed on the outer shape of the holding frame 23. The columnar portion 23 a is inserted into an opening 18 a of a plate-like metal member 18 described later. The columnar portion 23 a is a columnar portion extending along the longitudinal direction of the tip portion 11. The length in the longitudinal direction of the end portion 11 of the columnar portion 23 a is longer than the thickness in the longitudinal direction of the end portion 11 of the plate-like metal member 18.
　凸部２３ｂは、柱状部２３ａの基端方向の端に配設されており、柱状部２３ａの延在方向とは略直交する方向に向かって保持枠２３の外周面から突出している。板状金属部材１８内に柱状部２３ａが挿入された場合には、凸部２３ｂが板状金属部材１８と当接する。 The convex portion 23 b is disposed at an end of the columnar portion 23 a in the proximal direction, and protrudes from the outer peripheral surface of the holding frame 23 in a direction substantially orthogonal to the extending direction of the columnar portion 23 a. When the columnar part 23 a is inserted into the plate-like metal member 18, the convex part 23 b abuts on the plate-like metal member 18.
　本実施形態では一例として、保持枠２３は、レンズ鏡筒２４および中継筒２５の２つの筒状の部材からなる。図３に、保持枠２３を分解した斜視図を示す。レンズ鏡筒２４および中継筒２５は、前述のように金属等の導電性を有する材料からなる。 In the present embodiment, as an example, the holding frame 23 is formed of two cylindrical members of the lens barrel 24 and the relay cylinder 25. FIG. 3 shows an exploded perspective view of the holding frame 23. The lens barrel 24 and the relay cylinder 25 are made of a conductive material such as metal as described above.
　レンズ鏡筒２４は、対物レンズ２１を保持する円筒形状の部材である。また、中継筒２５は、光軸調整ガラス２６を保持する。すなわち、中継筒２５には、撮像素子２２が固定される。レンズ鏡筒２４の基端方向の端部は、中継筒２５内に所定の隙間を有して嵌り込む寸法を有している。レンズ鏡筒２４と中継筒２５との嵌合長を変化させることにより、撮像装置２０の焦点調整が可能である。焦点調整を行った後は、レンズ鏡筒２４と中継筒２５とは接着材等により固定される。 The lens barrel 24 is a cylindrical member that holds the objective lens 21. In addition, the relay cylinder 25 holds the optical axis adjustment glass 26. That is, the imaging element 22 is fixed to the relay cylinder 25. The end of the lens barrel 24 in the proximal direction has a dimension such that it can be fitted into the relay cylinder 25 with a predetermined gap. By changing the fitting length of the lens barrel 24 and the relay cylinder 25, focus adjustment of the imaging device 20 is possible. After focus adjustment, the lens barrel 24 and the relay cylinder 25 are fixed by an adhesive or the like.
　レンズ鏡筒２４の先端方向の端部の外径は、樹脂枠部材３０の貫通孔３０ａ内に所定の隙間を有して嵌り込む寸法を有している。レンズ鏡筒２４が貫通孔３０ａ内に嵌合した状態において、対物レンズ２１の光軸Ｏは、円形である貫通孔３０ａの中心軸と略平行となる。 The outer diameter of the end of the lens barrel 24 in the front end direction has a dimension such that it can be fitted into the through hole 30 a of the resin frame member 30 with a predetermined gap. In the state where the lens barrel 24 is fitted in the through hole 30a, the optical axis O of the objective lens 21 is substantially parallel to the central axis of the through hole 30a which is circular.
　レンズ鏡筒２４は、固定用樹脂３１によって、貫通孔３０ａ内に固定されている。固定用樹脂３１は、熱硬化性樹脂や紫外線硬化性樹脂等である。また、レンズ鏡筒２４の、貫通孔３０ａ内において挿入部１０の外側に露出する面は、固定用樹脂３１によって被覆されている。したがって、レンズ鏡筒２４は、挿入部１０の外側に対して電気的に絶縁されている。 The lens barrel 24 is fixed in the through hole 30 a by the fixing resin 31. The fixing resin 31 is a thermosetting resin, an ultraviolet curable resin, or the like. The surface of the lens barrel 24 exposed to the outside of the insertion portion 10 in the through hole 30 a is covered with the fixing resin 31. Therefore, the lens barrel 24 is electrically insulated from the outside of the insertion portion 10.
　図３に示す中継筒２５は、略円筒形状の部材である。本実施形態では、中継筒２５の外形が、柱状部２３ａおよび凸部２３ｂを構成している。したがって、本実施形態では柱状部２３ａは、外形が円柱形状である。また、凸部２３ｂは、円柱形状である柱状部２３ａの径方向に突出する。 The relay cylinder 25 shown in FIG. 3 is a substantially cylindrical member. In the present embodiment, the outer shape of the relay cylinder 25 constitutes the columnar portion 23 a and the convex portion 23 b. Therefore, in the present embodiment, the columnar portion 23a has a cylindrical outer shape. Moreover, the convex part 23b protrudes in the radial direction of the columnar part 23a which is a column shape.
　また、本実施形態では一例として、柱状部２３ａの直径は、レンズ鏡筒２４の最大の直径よりも小さい。なお、柱状部２３ａの直径は、レンズ鏡筒２４の最大の直径以上であってもよい。 Further, in the present embodiment, as an example, the diameter of the columnar portion 23 a is smaller than the maximum diameter of the lens barrel 24. The diameter of the columnar portion 23 a may be equal to or larger than the maximum diameter of the lens barrel 24.
　板状金属部材１８は、保持枠２３の柱状部２３ａが挿通される貫通孔である開口部１８ａを有する板状の部材である。板状金属部材１８は、金属等の導電性を有する材料からなる。本実施形態の板状金属部材１８は、厚さ１００μｍから３００μｍ程度の箔状の金属板である。なお、板状金属部材１８の厚さは、１００μｍ未満であってもよい。 The plate-like metal member 18 is a plate-like member having an opening 18 a which is a through hole through which the columnar portion 23 a of the holding frame 23 is inserted. The plate-like metal member 18 is made of a conductive material such as metal. The plate-like metal member 18 of the present embodiment is a foil-like metal plate having a thickness of about 100 μm to 300 μm. The thickness of the plate-like metal member 18 may be less than 100 μm.
　開口部１８ａは、板状金属部材１８を厚さ方向に貫通している。開口部１８ａは、内側に柱状部２３ａが圧入される形状であってもよいし、柱状部２３ａが隙間を有した状態で挿入される形状であってもよい。また、本実施形態では一例として開口部１８ａは円形の孔であるが、開口部１８ａは、矩形や正六角形等の多角形であってもよい。 The opening 18 a penetrates the plate-like metal member 18 in the thickness direction. The opening 18a may have a shape in which the columnar portion 23a is press-fitted into the inside, or may have a shape in which the columnar portion 23a is inserted with a gap. Further, in the present embodiment, the opening 18a is a circular hole as an example, but the opening 18a may be a polygon such as a rectangle or a regular hexagon.
　板状金属部材１８は、柱状部２３ａが挿通された状態において、先端部１１の長手方向に略直交する。すなわち、板状金属部材１８の開口部１８ａが設けられた部位は、柱状部２３ａが挿通された状態において、対物レンズ２１の光軸Ｏに対して略垂直に保持される。 The plate-like metal member 18 is substantially orthogonal to the longitudinal direction of the distal end portion 11 in a state where the columnar portion 23 a is inserted. That is, the portion of the plate-like metal member 18 where the opening 18a is provided is held substantially perpendicular to the optical axis O of the objective lens 21 in the state where the columnar portion 23a is inserted.
　また、板状金属部材１８の基端側に向く面１８ｂは、柱状部２３ａが挿通された状態において、凸部２３ｂに当接する。凸部２３ｂとの当接により、保持枠２３に対する板状金属部材１８の、先端部１１の長手方向についての位置決めがなされる。板状金属部材１８を凸部２３ｂに当接させる構成は特に限定されるものではないが、例えば板状金属部材１８は、接着剤や半田付けによって凸部２３ｂに当接する位置に保持される。 Further, the surface 18 b facing the base end side of the plate-like metal member 18 abuts on the convex portion 23 b in a state where the columnar portion 23 a is inserted. By the contact with the convex portion 23 b, positioning of the plate-like metal member 18 with respect to the holding frame 23 in the longitudinal direction of the tip end portion 11 is performed. The configuration for causing the plate-like metal member 18 to abut on the protrusion 23 b is not particularly limited. For example, the plate-like metal member 18 is held at a position abutted on the protrusion 23 b by an adhesive or soldering.
　保持枠２３が、撮像素子２２から離間して撮像素子２２よりも先端方向に位置していることから、板状金属部材１８が凸部２３ｂに当接した状態において、板状金属部材１８は、撮像素子２２よりも先端方向に位置する。 Since the holding frame 23 is spaced apart from the imaging device 22 and positioned in the distal direction more than the imaging device 22, the plate-like metal member 18 is in a state where the plate-like metal member 18 abuts on the convex portion 23 b It is positioned more distal than the image sensor 22.
　板状金属部材１８は、接地導体部１６またはコネクタ部９２の接地接点部９２ａに電気的に接続される。前述のように、接地導体部１６は、コネクタ部９２の接地接点部９２ａに電気的に接続された導電性の部材である。 The plate-like metal member 18 is electrically connected to the ground contact portion 92 a of the ground conductor portion 16 or the connector portion 92. As described above, the ground conductor portion 16 is a conductive member electrically connected to the ground contact portion 92 a of the connector portion 92.
　本実施形態では一例として、板状金属部材１８は、接地導体部１６である静電気導通ケーブル１７を介して、コネクタ部９２の接地接点部９２ａに電気的に接続される。具体的には、静電気導通ケーブル１７は、挿入部１０、および操作部４０内に挿通された被覆電線であり、導体線の先端が板状金属部材１８に接続されており、操作部４０の内部に設けられた金属製の金属部材に接続されている。当該金属部材は、接地接点部９２ａと電気的に接続されている。静電気導通ケーブル１７の導体線と板状金属部材１８および金属部材との接続は、例えば半田付けや、導電性接着剤によって行われてもよいし、また例えばネジによる締結によって行われてもよい。 In the present embodiment, as an example, the plate-like metal member 18 is electrically connected to the ground contact portion 92 a of the connector portion 92 through the electrostatic conduction cable 17 which is the ground conductor portion 16. Specifically, the electrostatic conduction cable 17 is a covered electric wire inserted into the insertion portion 10 and the operation portion 40, and the tip of the conductor wire is connected to the plate-like metal member 18, and the inside of the operation portion 40 is It is connected to the metal member made of metal provided in. The metal member is electrically connected to the ground contact portion 92a. The connection between the conductor wire of the electrostatic conduction cable 17 and the plate-like metal member 18 and the metal member may be performed by, for example, soldering, a conductive adhesive, or may be performed by, for example, fastening with a screw.
　以上に説明した本実施形態の内視鏡１は、光学像を形成する対物レンズ２１、光学像を電気信号へ変換する撮像素子２２、および対物レンズ２１と撮像素子２２を保持する導電性の保持枠２３、を備える撮像装置２０と、撮像装置２０を内包する非導電性の樹脂枠部材３０と、を備える。 The endoscope 1 according to the present embodiment described above includes an objective lens 21 for forming an optical image, an image pickup device 22 for converting an optical image into an electric signal, and conductive holding for holding the objective lens 21 and the image pickup device 22 An imaging device 20 including a frame 23 and a nonconductive resin frame member 30 including the imaging device 20 are provided.
　導電性である保持枠２３を構成するレンズ鏡筒２４は、非導電性である樹脂枠部材３０の貫通孔３０ａ内に挿通されている。レンズ鏡筒２４は、固定用樹脂３１によって被覆されることにより挿入部１０の外側に対して電気的に絶縁されているが、固定用樹脂３１の厚さは樹脂枠部材３０よりも薄いため、レンズ鏡筒２４は、撮像装置２０の他の部位に比して挿入部１０の外側からの静電気放電が流れやすい箇所である。 The lens barrel 24 constituting the holding frame 23 which is conductive is inserted into the through hole 30 a of the resin frame member 30 which is non-conductive. The lens barrel 24 is electrically insulated from the outside of the insertion portion 10 by being covered with the fixing resin 31, but since the thickness of the fixing resin 31 is thinner than the resin frame member 30, The lens barrel 24 is a portion where electrostatic discharge from the outside of the insertion portion 10 tends to flow compared to the other portions of the imaging device 20.
　撮像装置２０の保持枠２３は、導電性の板状金属部材１８の開口部１８ａ内に挿通されることによって、板状金属部材１８に電気的に接続されている。板状金属部材１８は、接地導体部１６を介して接地接点部９２ａに電気的に接続されている。 The holding frame 23 of the imaging device 20 is electrically connected to the plate-like metal member 18 by being inserted into the opening 18 a of the conductive plate-like metal member 18. The plate-like metal member 18 is electrically connected to the ground contact portion 92 a via the ground conductor portion 16.
　板状金属部材１８は、撮像装置２０の撮像素子２２よりも先端方向に配置されている。したがって、本実施形態の内視鏡１では、レンズ鏡筒２４に静電気放電が落ちたとしても、静電気は撮像素子２２には流れずに、板状金属部材１８、接地導体部１６および接地接点部９２ａによって構成されたバイパスルート側へ流れる。よって本実施形態の内視鏡１では、撮像装置２０の電子回路の静電気耐性を向上させることができる。 The plate-like metal member 18 is disposed in the distal direction of the imaging device 22 of the imaging device 20. Therefore, in the endoscope 1 of the present embodiment, even if the electrostatic discharge falls to the lens barrel 24, the static electricity does not flow to the imaging element 22, and the plate-like metal member 18, the ground conductor portion 16 and the ground contact portion It flows to the bypass route side configured by 92a. Therefore, in the endoscope 1 of the present embodiment, the electrostatic resistance of the electronic circuit of the imaging device 20 can be improved.
　また、本実施形態の内視鏡１では、板状金属部材１８は、撮像装置２０の長手方向に対して垂直に保持されている。このため、板状金属部材１８は、撮像装置２０に曲げ変形を生じさせる力を加えることがない。また、本実施形態の内視鏡１では、板状金属部材１８の厚さ方向が、先端部１１の長手方向と略一致する。したがって、本実施形態では、板状金属部材１８を配置することによる、先端部１１を長手方向に大型化させる影響を抑えることができる。 Further, in the endoscope 1 of the present embodiment, the plate-like metal member 18 is held perpendicular to the longitudinal direction of the imaging device 20. For this reason, the plate-like metal member 18 does not apply a force that causes the imaging device 20 to cause bending deformation. Moreover, in the endoscope 1 of the present embodiment, the thickness direction of the plate-like metal member 18 substantially coincides with the longitudinal direction of the distal end portion 11. Therefore, in the present embodiment, it is possible to suppress the influence of arranging the plate-like metal member 18 to increase the size of the tip 11 in the longitudinal direction.
　以上に説明したように、本実施形態の内視鏡１は、撮像装置２０に加えられる力を抑制しながら、撮像装置２０の電子回路の静電気耐性を向上させることができる。 As described above, the endoscope 1 of the present embodiment can improve the electrostatic resistance of the electronic circuit of the imaging device 20 while suppressing the force applied to the imaging device 20.
　図４に、本実施形態の板状金属部材１８の変形例を示す。本変形例の板状金属部材１８は、外縁部から開口部１８ａの内周面にまで至る切り欠き１８ｂが形成されている点が前述の実施形態と異なる。すなわち、本変形例では、開口部１８ａの内周面は閉じておらず、板状金属部材１８の外周面と繋がっている。言い換えれば、本実施形態の板状金属部材１８は、略Ｃ字形状である。 The modification of the plate-shaped metal member 18 of this embodiment is shown in FIG. The plate-like metal member 18 of this modification is different from the above-described embodiment in that a notch 18b is formed from the outer edge to the inner peripheral surface of the opening 18a. That is, in the present modification, the inner peripheral surface of the opening 18 a is not closed, and is connected to the outer peripheral surface of the plate-like metal member 18. In other words, the plate-like metal member 18 of the present embodiment is substantially C-shaped.
　したがって、本変形例の板状金属部材１８は、リテーニングリングのように、柱状部２３ａを、切り欠き１８ｂを経由して開口部１８ａ内に挿通させることができる。例えば、レンズ鏡筒２４の外径が開口部１８ａの内径よりも大きい場合、本変形例であれば、保持枠２３への板状金属部材１８の着脱を、レンズ鏡筒２４を取り外すことなく行うことができる。 Therefore, like the retaining ring, the plate-like metal member 18 of this modification can allow the columnar portion 23a to be inserted into the opening 18a via the notch 18b. For example, when the outer diameter of the lens barrel 24 is larger than the inner diameter of the opening 18a, in this modification, the plate-like metal member 18 is attached to and detached from the holding frame 23 without removing the lens barrel 24. be able to.
（第２の実施形態）　
　以下に、本発明の第２の実施形態を説明する。以下では第１の実施形態との相違点のみを説明するものとし、第１の実施形態と同様の構成要素については同一の符号を付し、その説明を適宜に省略する。 Second Embodiment
Hereinafter, a second embodiment of the present invention will be described. Hereinafter, only differences from the first embodiment will be described, and the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be appropriately omitted.
　図５に、本実施形態の内視鏡１の挿入部１０の先端部１１の断面図を示す。また、図６に、本実施形態の板状金属部材１８の斜視図を示す。 FIG. 5 shows a cross-sectional view of the distal end portion 11 of the insertion portion 10 of the endoscope 1 of the present embodiment. Moreover, in FIG. 6, the perspective view of the plate-shaped metal member 18 of this embodiment is shown.
　本実施形態は、板状金属部材１８の構成が第１の実施形態と異なる。本実施形態の板状金属部材１８は、板状金属部材１８を、保持枠２３の凸部２３ｂに向かって光軸Ｏに沿う方向に付勢する力を生じる板バネ部１８ｃを備える。 The present embodiment differs from the first embodiment in the configuration of the plate-like metal member 18. The plate-like metal member 18 of the present embodiment includes a plate spring portion 18 c that generates a force that urges the plate-like metal member 18 in the direction along the optical axis O toward the convex portion 23 b of the holding frame 23.
　図６に示すように、板バネ部１８ｃは、板状金属部材１８の外縁部から遠ざかる方向に延出させた部位を折り返すように折り曲げることにより形成されている。図５に示すように、板バネ部１８ｃは、先端部１１内において、板状金属部材１８の凸部２３ｂと当接する面とは反対の方向（先端方向）に配置される。板バネ部１８ｃは、樹脂枠部材３０の凸部２３ｂと光軸Ｏに沿う方向において対向する内周面に当接することで、板状金属部材１８を、凸部２３ｂに向かって光軸Ｏに沿う方向に付勢する力を発生する。 As shown in FIG. 6, the plate spring portion 18c is formed by bending a portion extending in a direction away from the outer edge portion of the plate-like metal member 18 so as to be folded back. As shown in FIG. 5, the plate spring portion 18 c is disposed in the tip portion 11 in the direction (tip direction) opposite to the surface of the plate-like metal member 18 that abuts on the protrusion 23 b. The flat spring portion 18c abuts on the inner peripheral surface facing the convex portion 23b of the resin frame member 30 in the direction along the optical axis O, whereby the plate-like metal member 18 is moved to the optical axis O toward the convex portion 23b. It generates a biasing force along the direction.
　したがって、本実施形態では、接着剤や半田付け等を使用せずに、板状金属部材１８を、凸部２３ｂに当接する位置に保持することができる。また、板バネ部１８ｃによって撮像装置２０に加えられる力は、光軸Ｏに沿う方向であることから、撮像装置２０に曲げ変形を生じさせるような力の入力は本実施形態でも発生しない。 Therefore, in the present embodiment, the plate-like metal member 18 can be held at a position in contact with the convex portion 23 b without using an adhesive or soldering. Further, since the force applied to the imaging device 20 by the plate spring portion 18c is in the direction along the optical axis O, input of a force that causes the imaging device 20 to cause bending deformation does not occur in this embodiment as well.
　なお、本実施形態の板状部１８も、図４に示す第１の実施形態の変形例のように、外縁部から開口部１８ａに至る切り欠き１８ｂを有していてもよい。 In addition, the plate-like-part 18 of this embodiment may also have the notch 18b which extends from an outer edge part to the opening part 18a like the modification of 1st Embodiment shown in FIG.
（第３の実施形態）　
　以下に、本発明の第３の実施形態を説明する。以下では第１の実施形態との相違点のみを説明するものとし、第１の実施形態と同様の構成要素については同一の符号を付し、その説明を適宜に省略する。 Third Embodiment
The third embodiment of the present invention will be described below. Hereinafter, only differences from the first embodiment will be described, and the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be appropriately omitted.
　図７に、本実施形態の内視鏡１の挿入部１０の先端部１１の断面図を示す。 FIG. 7 shows a cross-sectional view of the distal end portion 11 of the insertion portion 10 of the endoscope 1 of the present embodiment.
　本実施形態は、板状金属部材１８の構成が第１の実施形態と異なる。本実施形態の板状金属部材１８は、接地導体部１６に当接する延出部１８ｄを備える。図７に示すように、延出部１８ｄは、板状金属部材１８の開口部１８ａが形成された部位から、基端方向に光軸Ｏに沿って延出する。延出部１８ｄの基端方向の端部は、接地導体部１６に当接する。 The present embodiment differs from the first embodiment in the configuration of the plate-like metal member 18. The plate-like metal member 18 of the present embodiment includes an extending portion 18 d that abuts on the ground conductor portion 16. As shown in FIG. 7, the extending portion 18 d extends along the optical axis O in the proximal direction from the portion where the opening 18 a of the plate-like metal member 18 is formed. The proximal end of the extension 18 d abuts on the ground conductor 16.
　図示する本実施形態では、延出部１８ｄの基端方向の端部は、接地導体部１６である湾曲部先端部材１２ａに当接している。なお、延出部１８ｄの基端方向の端部は、接地導体部１６である操作ワイヤ１２ｂに当接する形態であってもよい。 In the illustrated embodiment, the end of the extension 18 d in the proximal direction is in contact with the curved portion distal end member 12 a which is the ground conductor 16. The end of the extension 18 d in the proximal direction may be in contact with the operation wire 12 b which is the ground conductor 16.
　本実施形態においても、第１の実施形態と同様に、レンズ鏡筒２４に静電気が印加された場合、静電気は撮像素子２２には流れずに、板状金属部材１８、接地導体部１６および接地接点部９２ａによって構成されたバイパスルート側へ流れる。また、本実施形態においても、第１の実施形態と同様に、板状金属部材１８は、撮像装置２０に曲げ変形を生じさせる力を加えることがない。したがって、本実施形態の内視鏡１は、撮像装置２０に加えられる力を抑制しながら、撮像装置２０の電子回路の静電気耐性を向上させることができる。 Also in the present embodiment, as in the first embodiment, when static electricity is applied to the lens barrel 24, the static electricity does not flow to the imaging device 22, and the plate-like metal member 18, the ground conductor portion 16 and the ground It flows to the bypass route side constituted by the contact portion 92a. Also in the present embodiment, as in the first embodiment, the plate-like metal member 18 does not apply a force that causes the imaging device 20 to cause bending deformation. Therefore, the endoscope 1 of the present embodiment can improve the electrostatic resistance of the electronic circuit of the imaging device 20 while suppressing the force applied to the imaging device 20.
　なお、本実施形態の板状部１８も、図４に示す第１の実施形態の変形例のように、外縁部から開口部１８ａに至る切り欠き１８ｂを有していてもよい。 In addition, the plate-like-part 18 of this embodiment may also have the notch 18b which extends from an outer edge part to the opening part 18a like the modification of 1st Embodiment shown in FIG.
　また、本実施形態の板状部１８は、図５に示す第２の実施形態のように、板状金属部材１８を、保持枠２３の凸部２３ｂに向かって光軸Ｏに沿う方向に付勢する力を生じる板バネ部１８ｃを備えていてもよい。 Further, as in the second embodiment shown in FIG. 5, the plate-like portion 18 of the present embodiment attaches the plate-like metal member 18 in the direction along the optical axis O toward the convex portion 23 b of the holding frame 23. You may provide the leaf | plate spring part 18c which produces the urging | biasing force.
（第４の実施形態）　
　以下に、本発明の第４の実施形態を説明する。以下では第１の実施形態との相違点のみを説明するものとし、第１の実施形態と同様の構成要素については同一の符号を付し、その説明を適宜に省略する。 Fourth Embodiment
The fourth embodiment of the present invention will be described below. Hereinafter, only differences from the first embodiment will be described, and the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be appropriately omitted.
　図８に、本実施形態の内視鏡１の挿入部１０の先端部１１の断面図を示す。 FIG. 8 shows a cross-sectional view of the distal end portion 11 of the insertion portion 10 of the endoscope 1 of the present embodiment.
　本実施形態は、樹脂枠部材３０および板状金属部材１８の構成が第１の実施形態と異なる。本実施形態の樹脂枠部材３０は、挿入部１０の内部空間に露出する面の一部または全部に、導電性の材料からなる薄膜である導電膜３０ｂが形成されている。導電膜３０ｂは、例えば蒸着や電気めっきによって形成される金属膜である。導電膜３０ｂは、挿入部１０の外表面には露出していない。また、導電膜３０ｂは、樹脂枠部材３０に接する接地導体部１６である湾曲部先端部材１２ａに当接している。 The present embodiment differs from the first embodiment in the configurations of the resin frame member 30 and the plate-like metal member 18. In the resin frame member 30 of the present embodiment, a conductive film 30 b which is a thin film made of a conductive material is formed on a part or the whole of the surface exposed to the internal space of the insertion portion 10. The conductive film 30 b is a metal film formed by, for example, vapor deposition or electroplating. The conductive film 30 b is not exposed to the outer surface of the insertion portion 10. The conductive film 30 b is in contact with the curved portion distal end member 12 a which is the ground conductor portion 16 in contact with the resin frame member 30.
　本実施形態の板状金属部材１８は、導電膜３０ｂに当接する延出部１８ｅを備える。図８に示すように、延出部１８ｅは、板状金属部材１８の開口部１８ａが形成された部位から、光軸Ｏに直交する方向に延出する。すなわち、板状金属部材１８の開口部１８ａが形成された部位と、延出部１８ｅとは、同一平面上に位置する。 The plate-like metal member 18 of the present embodiment is provided with an extension 18 e that abuts on the conductive film 30 b. As shown in FIG. 8, the extension 18 e extends in the direction orthogonal to the optical axis O from the portion where the opening 18 a of the plate-like metal member 18 is formed. That is, the part in which the opening part 18a of the plate-shaped metal member 18 was formed, and the extension part 18e are located on the same plane.
　本実施形態においても、第１の実施形態と同様に、レンズ鏡筒２４に静電気が印加された場合、静電気は撮像素子２２には流れずに、板状金属部材、接地導体部１６および接地接点部９２ａによって構成されたバイパスルート側へ流れる。また、本実施形態においても、板状部１８は厚さが１００μｍ以下の薄い金属箔であることから、板状金属部材１８は、撮像装置２０に曲げ変形を生じさせる力を加えることがない。 Also in this embodiment, as in the first embodiment, when static electricity is applied to the lens barrel 24, the static electricity does not flow to the imaging element 22, and the plate-like metal member, the ground conductor portion 16 and the ground contact It flows to the bypass route side configured by the unit 92a. Also in this embodiment, since the plate-like portion 18 is a thin metal foil having a thickness of 100 μm or less, the plate-like metal member 18 does not apply a force that causes the imaging device 20 to generate bending deformation.
　したがって、本実施形態の内視鏡１は、撮像装置２０に加えられる力を抑制しながら、撮像装置２０の電子回路の静電気耐性を向上させることができる。 Therefore, the endoscope 1 of the present embodiment can improve the electrostatic resistance of the electronic circuit of the imaging device 20 while suppressing the force applied to the imaging device 20.
　なお、本実施形態の板状部１８も、図４に示す第１の実施形態の変形例のように、外縁部から開口部１８ａに至る切り欠き１８ｂを有していてもよい。 In addition, the plate-like-part 18 of this embodiment may also have the notch 18b which extends from an outer edge part to the opening part 18a like the modification of 1st Embodiment shown in FIG.
　また、本実施形態の板状部１８は、図５に示す第２の実施形態のように、板状金属部材１８を、保持枠２３の凸部２３ｂに向かって光軸Ｏに沿う方向に付勢する力を生じる板バネ部１８ｃを備えていてもよい。 Further, as in the second embodiment shown in FIG. 5, the plate-like portion 18 of the present embodiment attaches the plate-like metal member 18 in the direction along the optical axis O toward the convex portion 23 b of the holding frame 23. You may provide the leaf | plate spring part 18c which produces the urging | biasing force.
　なお、本発明は、上述した実施形態に限られるものではなく、請求の範囲及び明細書全体から読み取れる発明の要旨或いは思想に反しない範囲で適宜変更可能であり、そのような変更を伴う内視鏡もまた本発明の技術的範囲に含まれるものである。 The present invention is not limited to the above-described embodiment, but can be appropriately modified without departing from the scope or spirit of the invention as can be read from the claims and the entire specification, and an endoscope with such modifications Mirrors are also within the scope of the present invention.
　本出願は、２０１７年８月１日に日本国に出願された特願２０１７－１４８９８３号を優先権主張の基礎として出願するものであり、上記の開示内容は、本願明細書、請求の範囲、図面に引用されたものとする。 This application is based on Japanese Patent Application No. 201-148983, filed on Aug. 1, 2017, as a basis for claiming priority, and the above disclosure is made of the present specification and claims. It shall be quoted in the drawings.

Claims (6)

  1. 　光学像を形成する対物レンズ、前記光学像を電気信号へ変換する撮像素子、および前記対物レンズと前記撮像素子を保持する導電性の保持枠、を備える撮像装置と、
    　外部装置に着脱可能なコネクタ部と、
    　開口部が形成された板状の部材であって、前記開口部へ前記保持枠が挿通されることで前記保持枠と電気的に接続された板状金属部材と、
    　前記保持枠および前記板状金属部材を内包する非導電性の樹脂枠部材と、
    　前記コネクタ部に設けられた導電性の接地接点部と、
    　前記板状金属部材および前記接地接点部を電気的に接続する１つまたは複数の接地導体部と、
    を備え、
    　前記板状金属部材の前記開口部が設けられた部位は、前記撮像素子よりも先端側において、前記対物レンズの光軸に対して垂直に保持される
    ことを特徴とする内視鏡。     An imaging device comprising an objective lens for forming an optical image, an imaging device for converting the optical image into an electric signal, and a conductive holding frame for holding the objective lens and the imaging device;
    A connector unit that can be attached to and detached from an external device;
    A plate-like member having an opening, wherein the holding frame is inserted into the opening to electrically connect the holding frame to the holding member;
    A non-conductive resin frame member including the holding frame and the plate-like metal member;
    A conductive ground contact portion provided in the connector portion;
    One or more grounding conductors that electrically connect the plate-like metal member and the grounding contact portion;
    Equipped with
    An endoscope characterized in that a portion of the plate-like metal member at which the opening is provided is held perpendicular to the optical axis of the objective lens on the tip end side of the imaging device.
  2. 　前記板状金属部材は、外縁部から前記開口部に至る切り欠きを有する
    ことを特徴とする請求項１に記載の内視鏡。     The endoscope according to claim 1, wherein the plate-like metal member has a notch extending from an outer edge to the opening.
  3. 　前記保持枠は、前記光軸に対して垂直な方向に向かって突出する凸部を有し、
    　前記板状金属部材は、前記樹脂枠部材の内周面のうちの前記凸部と前記光軸に沿う方向において対向する部位に当接することで、当該板状金属部材を、前記凸部に向かって前記光軸に沿う方向に付勢する力を発生する板バネ部を備える
    ことを特徴とする請求項１に記載の内視鏡。     The holding frame has a convex portion protruding in a direction perpendicular to the optical axis,
    The plate-like metal member contacts the portion of the inner circumferential surface of the resin frame member facing the protrusion in the direction along the optical axis, thereby moving the plate-like metal member toward the protrusion The endoscope according to claim 1, further comprising: a leaf spring portion that generates a biasing force in a direction along the optical axis.
  4. 　前記撮像装置が先端部に配設された挿入部を備え、
    　前記接地導体部は、前記挿入部内に挿通された被覆電線の導体部である
    ことを特徴とする請求項１に記載の内視鏡。     The image pickup apparatus includes an insertion portion disposed at a tip end portion;
    The endoscope according to claim 1, wherein the ground conductor portion is a conductor portion of a covered electric wire inserted into the insertion portion.
  5. 　前記撮像装置が先端部に配設された挿入部を備え、
    　前記接地導体部は、前記挿入部内に配設された樹脂内部に設けられた金属製の枠部材である
    ことを特徴とする請求項１に記載の内視鏡。     The image pickup apparatus includes an insertion portion disposed at a tip end portion;
    The endoscope according to claim 1, wherein the ground conductor portion is a metal frame member provided inside a resin disposed in the insertion portion.
  6. 　前記撮像装置が先端部に配設された挿入部と、
    　前記挿入部を湾曲させる湾曲部と、を備え、
    　前記接地導体部は、前記挿入部内に挿通され前記湾曲部の湾曲を遠隔操作するための操作ワイヤである
    ことを特徴とする請求項１に記載の内視鏡。     An insertion portion in which the imaging device is disposed at a tip end portion;
    And a curved portion for curving the insertion portion,
    The endoscope according to claim 1, wherein the ground conductor portion is an operation wire which is inserted into the insertion portion to remotely control the bending of the bending portion.
PCT/JP2018/026057 2017-08-01 2018-07-10 Endoscope WO2019026567A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833002U (en) * 1981-08-28 1983-03-03 株式会社町田製作所 endoscope angle wire
JP2015062555A (en) * 2013-09-25 2015-04-09 オリンパスメディカルシステムズ株式会社 Endoscope
JP2016540571A (en) * 2013-12-02 2016-12-28 エンドチョイス インコーポレイテッドＥｎｄｏｃｈｏｉｃｅ， Ｉｎｃ． Fluid distributor for observation endoscope

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833002U (en) * 1981-08-28 1983-03-03 株式会社町田製作所 endoscope angle wire
JP2015062555A (en) * 2013-09-25 2015-04-09 オリンパスメディカルシステムズ株式会社 Endoscope
JP2016540571A (en) * 2013-12-02 2016-12-28 エンドチョイス インコーポレイテッドＥｎｄｏｃｈｏｉｃｅ， Ｉｎｃ． Fluid distributor for observation endoscope

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