JP7598290B2 - Endoscopy - Google Patents

Description

The present invention relates to an endoscope.

The imaging device mounted on the tip of the insertion section of an endoscope generally includes an imaging element (image sensor) and a circuit board on which the imaging element is mounted, and multiple cables inserted into the insertion section are connected to the circuit board.

To suppress noise, a coaxial cable with a coaxial shield that covers the core wire is used as a cable for transmitting signals from the imaging element. In addition, a configuration with a collective shield that covers the outer circumference of multiple coaxial cables is also used to further suppress noise.

For example, Patent Document 1 discloses a cable connector that includes an insertion section, a circuit board that is disposed at the tip of the insertion section, a plurality of single-wire cables that are bundled together, a plurality of coaxial cables that are bundled together with the plurality of single-wire cables, a bundle shield that covers the periphery of the plurality of single-wire cables and the plurality of coaxial cables that are bundled together, and a bundle coating that covers the periphery of the bundle shield, the bundle cable that is disposed within the insertion section and connected to the circuit board, a plurality of single-wire connection terminals that are provided in the single-wire connection terminal forming region of the circuit board and to which the core wires of the plurality of single-wire cables are individually connected, and a cable connector that is disposed within the single-wire connection terminal forming region of the circuit board and connected to the plurality of single-wire connection terminals that are provided in the single-wire connection terminal forming region of the circuit board. The endoscope is provided with a plurality of coaxial core wire connection terminals provided in a coaxial shield connection terminal forming region of the circuit board, to which the shields of the plurality of coaxial cables are connected individually, and a bundled wire shield connection terminal provided in a bundled wire shield connection terminal forming region of the circuit board, to which the bundled wire shield is connected, and in which the single-wire connection terminal forming region, the coaxial core wire connection terminal forming region, the coaxial shield connection terminal forming region, and the bundled wire shield connection terminal forming region are arranged vertically at a predetermined interval on the same straight line on the same plane.

JP 2013-013666 A

There is a demand for further miniaturization of the insertion section of an endoscope. However, with a coaxial cable, both the core wire and the coaxial shield must be connected to the connection terminals on the circuit board. Therefore, increasing the number of coaxial cables increases the number of connection terminals formed on the circuit board, creating the problem of impeding miniaturization.

The objective of the present invention is to solve these problems and to provide an endoscope with a coaxial cable that can reduce the size of the insertion section.

The present invention solves the problems by the following configuration.
[1] An endoscope having an insertion portion to be inserted into a subject,
a cable including one or more coaxial cables wired in an insertion portion and a collective shield covering the outer periphery of the one or more coaxial cables;
An endoscope in which a coaxial shield of a coaxial cable and an omnidirectional shield are soldered together on the inside of the omnidirectional shield.
[2] An imaging element that photoelectrically converts light incident on an imaging surface;
a circuit board on which the imaging element is mounted;
The endoscope according to claim 1, wherein the collective shield is connected to a ground terminal of the circuit board.
[3] The endoscope according to [1] or [2], wherein the color of the outer sheath of the coaxial cable is the same as that of the core wire coating that covers the core wire.
[4] A lens that forms an image on an imaging surface of an imaging element;
A lens barrel for holding a lens;
a sensor holder for holding the lens barrel;
The endoscope according to claim 2 or 3, further comprising an anchor for holding the cable relative to the sensor holder.
[5] The endoscope according to [4], wherein the anchor has a holding portion on the base end side for crimping the cable.
[6] The endoscope according to [5], wherein the cross-sectional shape of the holding portion of the anchor is triangular.
[7] The endoscope according to [5] or [6], wherein the holding portion of the anchor is soldered to the collective shield.

The present invention provides an endoscope with a coaxial cable that allows the insertion section to be made smaller.

1 is a diagram conceptually illustrating an example of an endoscope system using an endoscope of the present invention. 1 is a perspective view conceptually illustrating an example of an imaging device provided in an endoscope of the present invention. FIG. 3 is a perspective view showing a state in which the anchor is removed from FIG. 2 . 2 is an enlarged conceptual diagram showing a tip portion of a cable. FIG. FIG. 4 is a cross-sectional view conceptually showing a holding portion of the anchor.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an endoscope according to the present invention will be described with reference to the drawings.
The following description of the components may be based on a representative embodiment of the present invention, but the present invention is not limited to such an embodiment. In the drawings of this specification, the scale of each part is appropriately changed for ease of viewing.
In this specification, a numerical range expressed using "to" means a range that includes the numerical values before and after "to" as the lower and upper limits.

[Endoscope]
The endoscope of the present invention comprises:
An endoscope having an insertion portion to be inserted into a subject,
a cable including one or more coaxial cables wired in an insertion portion and a collective shield covering the outer periphery of the one or more coaxial cables;
In this endoscope, a coaxial shield of a coaxial cable and an integrated shield are soldered to the inside of the integrated shield.

Figure 1 conceptually illustrates an example of an endoscope system including an endoscope according to the present invention.

The endoscope system 1 includes an endoscope 2, a light source unit 3, and a processor unit 4.

The endoscope 2 has an insertion section that is inserted into the subject, an operating section that is connected to the insertion section, and a universal cord that extends from the operating section. The insertion section is composed of a tip section, a curved section that is connected to the tip section, and a flexible section that connects the curved section to the operating section.

The tip portion is provided with an illumination optical system that emits illumination light to illuminate the observation site, an imaging device that images the observation site, and an imaging optical system. The bending portion is configured to be bendable in a direction perpendicular to the longitudinal axis of the insertion portion, and the bending operation of the bending portion is controlled by the operating portion. In addition, the flexible portion is configured to be relatively flexible so that it can be deformed to follow the shape of the insertion path of the insertion portion.

The operation section is provided with buttons for controlling the imaging operation of the imaging device at the tip, knobs for controlling the bending operation of the bending section, etc. The operation section is also provided with an introduction port through which a treatment tool such as an electric scalpel is introduced, and a treatment tool channel is provided inside the insertion section, which extends from the introduction port to the tip and through which a treatment tool such as forceps is inserted.

A connector is provided at the end of the universal cord, and the endoscope 2 is connected via the connector to a light source unit 3 that generates illumination light emitted from the illumination optical system at the tip, and a processor unit 4 that processes video signals acquired by an imaging device at the tip.

The processor unit 4 receives the video signal photoelectrically converted by the imaging element of the imaging device, processes the video signal to generate video data of the observed area, and displays and records the generated video data on a monitor. The processor unit 4 may be configured by a processor such as a PC (personal computer).

The light source unit 3 generates illumination light such as white light or specific wavelength light composed of three primary colors such as red (R), green (G), and blue (B) light, and supplies it to the endoscope 2, where it propagates through a light guide or the like within the endoscope 2 and is emitted from the illumination optical system at the tip of the insertion section of the endoscope 2 to illuminate the area to be observed within the body cavity, in order to capture an image of the area to be observed within the body cavity using the imaging device of the endoscope 2 and obtain an image signal.

A light guide and a group of electrical wires (signal cables) are housed inside the insertion section, the operating section, and the universal cord. Illumination light generated by the light source unit 3 is guided to the illumination optical system at the tip via the light guide, and signals and/or power are transmitted between the imaging device at the tip and the processor unit 4 via the group of electrical wires (cables).

The endoscope system 1 may further include a water tank for storing cleaning water, etc., and a suction pump for sucking up the aspirated material from within the body cavity (including the supplied cleaning water, etc.). It may also include a supply pump for supplying cleaning water from the water tank or gas such as external air to a duct (not shown) within the endoscope.

Figure 2 shows a perspective view of an example of an imaging device included in an endoscope of the present invention. Figure 3 shows a perspective view of the state shown in Figure 2 with the anchor removed.

The imaging device 10 shown in Figures 2 and 3 has a lens (not shown), a lens barrel 14 that holds the lens, an imaging element 16, a cover glass 17, an optical member 18, a sensor holder 20, a circuit board 22, an anchor 40, and a cable 32.

The lens is an optical system that focuses incident light onto the imaging surface of the image sensor 16. The lens is held in the lens barrel 14.

The lens barrel 14 is a cylindrical member that holds one or more lenses. The lens barrel 14 holds the lenses so that the optical axis of the lenses is perpendicular to the surface of the optical member 18 that faces the lenses.

The configuration of the lens and lens barrel 14 is not particularly limited. For example, it may have one lens, two lenses, or four or more lenses. Furthermore, each lens may be a convex lens or a concave lens.

The imaging element 16 is an element that captures an image by converting light focused on the imaging surface of the imaging element 16 by the lens into an electrical signal through photoelectric conversion. The imaging element 16 is a conventionally known element such as a CCD (Charge-Coupled Device) sensor or a CMOS (Complementary MOS) sensor.

The image sensor 16 is disposed closer to the base end of the endoscope than the lens barrel 14. In the illustrated example, the image sensor 16 is mounted on the circuit board 22 so that the imaging surface is perpendicular to the optical axis of the lens.

The cover glass 17 is placed on the imaging surface of the imaging element 16 to protect the imaging surface. The size of the cover glass 17 in a plan view is approximately the same as the size of the imaging surface of the imaging element 16. The cover glass 17 is adhesively fixed to the entire imaging surface of the imaging element 16.

An optical member 18 is disposed on the surface (incident surface) of the cover glass 17 opposite the imaging element 16. Note that in the present invention, the cover glass 17 may not be included. In that case, the optical member 18 is disposed on the imaging surface of the imaging element 16.

The circuit board 22 is a board on which the imaging element 16 is mounted. Electronic components other than the imaging element 16 may also be mounted on the circuit board 22. The circuit board 22 is provided with a number of connection terminals through which signals or power are input and output to and from the imaging element 16 and the electronic components. Each coaxial cable of the cable 32 is electrically connected to the connection terminals.

In the illustrated example, the circuit board 22 has a shape in which a plate-like member is curved at two points. Specifically, the circuit board 22 has curved portions at two points in the optical axis direction of the lens (hereinafter also referred to as the axial direction), which are curved around an axis perpendicular to the axial direction. The tip side of the circuit board 22 is arranged so that its surface is perpendicular to the axial direction, and the surface perpendicular to the axial direction is arranged facing the lens (lens barrel 14). The image sensor 16 is mounted on the lens side of the surface perpendicular to the axial direction.

The circuit board 22 is a conventionally known circuit board used in an imaging device for an endoscope. The circuit board 22 may be a flexible board having flexibility. There are no particular limitations on the flexible board, and any conventionally known flexible board may be used. As an example, the flexible board is formed by forming a circuit made of copper foil or the like on a base film made of a resin material such as polyimide or polyethylene terephthalate (PET).

In the illustrated example, the circuit board 22 has a shape bent at two places, but this is not limited to this, and the circuit board 22 may have no bent places, or may have a shape bent at one place or at three or more places. In addition, the bending positions are not limited to the example shown in FIG. 3.

In addition, there are no particular limitations on the arrangement of the imaging element 16, electronic components, connection terminals, etc. on the circuit board 22. In the example shown in FIG. 3, the imaging element 16 is mounted on the tip side of the circuit board 22, and four connection terminals 27-30 to which the core wires of the coaxial cables 33-36 are connected, and a ground connection terminal (hereinafter, ground terminal) 26 to which the collective shield 32a of the cable 32 is connected are arranged on the base end side.

The circuit board 22 (circuit) and the image sensor 16 may be electrically connected via one or more solder balls, anisotropic conductive film (ACF), etc. In addition, when the image sensor 16 and the circuit board 22 are connected by solder balls, underfill may be filled in the space between the image sensor 16 and the circuit board 22 where there are no solder balls.

As the solder balls, any conventional solder balls used to electrically connect a sensor and a substrate in an endoscopic imaging device can be used as appropriate. For example, a Sn-Ag-Cu alloy can be used as the material for the solder balls.

As the underfill, any conventionally known underfill used as an underfill in an endoscopic imaging device can be used as appropriate. For example, a resin material such as epoxy resin can be used as the underfill.

A cable 32 is connected to the circuit board 22. In the example shown in FIG. 3, the cable 32 has four coaxial cables 33-36, a tubular collective shield 32a that gathers and covers the outer circumference of the four coaxial cables 33-36, and a tubular outer sheath 32b that covers the outer circumference of the collective shield 32a. The collective shield 32a is formed by weaving multiple shielded wires into a tubular shape. The outer sheath 32b is made of an insulating material. The tip of the collective shield 32a is exposed from the outer sheath 32b.

The coaxial cables 33 to 36 each have a core wire (33c to 36c), a tubular core wire coating (33d to 36d) that covers the periphery of the core wire, a tubular coaxial shield (33a to 36a) that covers the periphery of the core wire coating, and a tubular coaxial outer coating (33b to 36b) that covers the periphery of the coaxial shield. The core wire is made of a conductor wire. The coaxial shield is made by weaving multiple shield wires into a tube shape. The core wire coating and the coaxial outer coating are made of an insulating material. In each of the coaxial cables 33 to 36, the tip of the core wire (33c to 36c) is exposed from the core wire coating (33d to 36d), the tip of the core wire coating (33d to 36d) is exposed from the coaxial shield (33a to 36a), and the tip of the coaxial shield (33a to 36a) is exposed from the coaxial outer coating (33b to 36b).

As shown in FIG. 3, the core wires (33c to 36c) of each coaxial cable (33 to 36) are connected to connection terminals (27 to 30) on the circuit board 22. The collective shield 32a is connected to the ground terminal 26 on the circuit board 22.

In the present invention, the coaxial shield of the coaxial cable and the collective shield 32a are soldered together on the inside of the collective shield 32a.

Figure 4 shows an enlarged conceptual diagram of the tip of cable 32. In Figure 4, the collective shield 32a is shown in cross section.

As shown in FIG. 4, the coaxial shields (33a to 36a) of the coaxial cables (33 to 36) are twisted at the tip, and each twisted wire is soldered at the solder joint 38 on the inner surface of the tubular collective shield 32a.

The coaxial shields (33a to 36a) of the coaxial cables (33 to 36) are soldered to the collective shield 32a on the inner side of the collective shield 32a, so the ends of the coaxial shields (33a to 36a) of the coaxial cables (33 to 36) that are exposed from the coaxial sheaths (33b to 36b) are covered by the collective shield 32a and are not exposed. The coaxial sheaths (33b to 36b) are also covered by the collective shield 32a and are not exposed. The core wire sheaths (33d to 36d) are partially covered by the collective shield 32a, but part of the ends are exposed from the collective shield 32a.

As mentioned above, there is a demand for further miniaturization of the insertion section of an endoscope, but because both the core wire and the coaxial shield of a coaxial cable must be connected to the connection terminals on the circuit board, increasing the number of coaxial cables also increases the number of connection terminals formed on the circuit board, creating a problem that hinders miniaturization.

In contrast, by configuring the coaxial shields (33a to 36a) of each coaxial cable (33 to 36) to be soldered to the collective shield 32a on the inner side of the collective shield 32a, the collective shield 32a can be connected to the ground terminal 26 on the circuit board 22, and each coaxial shield (33a to 36a) can also be electrically connected to the ground terminal 26. As a result, even if there are a large number of coaxial cables, the circuit board 22 only needs to have one ground terminal 26, and there is no need to increase the number of connection terminals, making it possible to reduce the size. In addition, since multiple shields can be connected to the ground terminal with a single connection, manufacturing is easier.

In the example shown in FIG. 4, the twisted wires of the coaxial shields (33a to 36a) of the coaxial cables (33 to 36) are soldered together at one location to the collective shield 32a, but this is not limited to the configuration, and the twisted wires of the coaxial shields (33a to 36a) may be soldered to the inner surface of the collective shield 32a at different locations.

In the example shown in FIG. 4, the tip side of the coaxial shield (33a to 36a) of each coaxial cable (33 to 36) is twisted and soldered to the collective shield 32a, but this is not limited to the configuration, and the shield may be soldered to the collective shield 32a while remaining in a braided wire state.

There are no particular limitations on the method for soldering the coaxial shields (33a to 36a) of the coaxial cables (33 to 36) to the inner surface of the collective shield 32a. For example, the collective shield 32a can be turned over once to expose the inner surface of the collective shield 32a, the coaxial shields (33a to 36a) of the coaxial cables (33 to 36) can be soldered to the inner surface of the collective shield 32a, and the collective shield 32a can be returned to its original state, thereby soldering the coaxial shields (33a to 36a) to the inner surface of the collective shield 32a.

In the illustrated example, cable 32 has four coaxial cables, but this is not limited to this. Cable 32 may have one to three coaxial cables, or may have five or more coaxial cables. Furthermore, cable 32 may have other cables as long as it has at least one coaxial cable. For example, cable 32 may have a single-axial cable consisting of an inner conductor and a sheath that covers the outer circumference of the inner conductor.

Also, if there are multiple coaxial cables, it is sufficient that the coaxial shield of at least one coaxial cable is joined to the collective shield. Depending on the circuit configuration, the coaxial shields of some coaxial cables may be joined to other components such as a circuit board, or may not be joined to anything.

In addition, it is preferable that the color of the coaxial sheath (33b to 36b) and the color of the core wire sheath (33d to 36d) of each of the coaxial cables (33 to 36) are the same. Generally, when there are multiple coaxial cables, the coaxial sheath of each coaxial cable is a different color for identification. On the other hand, the color of the core wire sheath that covers the core wire may be the same for each coaxial cable. As described above, in the present invention in which the coaxial shield (33a to 36a) is soldered to the inner surface of the collective shield 32a, the coaxial sheath (33b to 36b) of the coaxial cables (33 to 36) is covered by the collective shield 32a. This makes it difficult to identify the color of the coaxial sheath of the coaxial cables. Therefore, by making the color of the coaxial sheath (33b-36b) of each coaxial cable (33-36) the same as the color of the core wire sheath (33d-36d), it is possible to easily identify the coaxial cables (33-36) by the color of the core wire sheath (33d-36d), and mistakes can be prevented.

The optical member 18 is disposed between the lens barrel 14 and the image sensor 16 (cover glass 17). The optical member 18 guides light that has passed through the lens held in the lens barrel 14 to the imaging surface of the image sensor 16. The optical member 18 is disposed such that the light entrance surface and exit surface are perpendicular to the axial direction. The optical member 18 may simply transmit light, or may have the effect of focusing light. By having the effect of focusing light, the optical member 18 can bring the lens and the image sensor 16 closer to each other, allowing for a smaller size.

The sensor holder 20 is a member that holds the lens barrel 14 and the optical member 18. The sensor holder 20 is a roughly cylindrical member, and the lens barrel 14 is fitted inside the cylindrical portion to hold the lens barrel 14. The inner surface of the sensor holder 20 and the outer peripheral surface of the lens barrel 14 are fixed by adhesive.

Any of the various known adhesives used in conventional endoscopes can be used as the adhesive for bonding the sensor holder 20 and the lens barrel 14. This also applies to the adhesives used to bond other components together.

The sensor holder 20 has a polygonal flange portion 20a on the end face on the base end side of the tube portion. In addition, the base end side surface of the flange portion 20a has two positioning feathers 20b standing from the flange portion 20a to the base end side. In the example shown in FIG. 3, the two positioning feathers 20b are arranged to face each other at a distance in the width direction of the circuit board 22. The distance between the two positioning feathers 20b is approximately the same as the width of the optical member 18. The incident surface of the optical member 18 is abutted between the two positioning feathers 20b of the flange portion 20a of this sensor holder 20. The optical member 18 is positioned by the flange portion 20a and the two positioning feathers 20b.

The sensor holder 20 holds the lens barrel 14 and the optical member 18 in a predetermined position, thereby fixing the relative position between the lens barrel 14 and the optical member 18, i.e., the relative position between the lens barrel 14 and the image sensor 16.

The lens barrel 14 is then adhesively fixed to the sensor holder 20 with its relative position in the optical axis direction of the lens adjusted so that the imaging surface of the image sensor 16 is in focus.

The anchor 40 holds the cable 32 relative to the sensor holder 20. In the illustrated example, the anchor 40 has two plate-shaped portions 40c extending in the optical axis direction, and an arm portion 40a at the tip of each plate-shaped portion 40c. The arm portion 40a is adhered to the outer surface of the positioning feather 20b of the sensor holder 20 (the surface opposite to the surface where the two positioning feathers 20b face each other). The two plate-shaped portions 40c are spaced apart in the width direction of the circuit board 22 and are arranged to face each other with the circuit board 22 in between.

The anchor 40 also has two plate-like portions 40c connected to the base end and a holding portion 40e that holds the cable 32. The holding portion 40e is crimped to press against the cable 32 and holds the cable 32.

Figure 5 shows a cross-sectional view at the position of the holding portion 40e. In the example shown in Figures 2 to 3 and 5, the holding portion 40e has a generally triangular cross-sectional shape, and holds the cable 32 by pressing the inside of the generally triangular shape against the cable 32. In other words, the holding portion 40e has a portion that protrudes outward beyond the plate-shaped portion 40c in a direction perpendicular to the axial direction, and by bending this portion toward the side where the cable 32 is placed, it is formed into a generally triangular shape and holds the cable 32.

It is also preferable that at least a portion of the holding portion 40e contacts the collective shield 32a of the cable 32. By configuring the holding portion 40e to contact the collective shield 32a, the anchor 40 can be grounded, and noise from the imaging element 16 and electronic components arranged inside the anchor 40 can be further reduced. Therefore, it is preferable that the position of the holding portion 40e of the anchor 40 overlaps in the axial direction with the position where the ground terminal 26 of the circuit board 22 is arranged.

The shape of the holding portion 40e is not limited to the above example, so long as it can hold the cable 32. For example, the holding portion 40e may be shaped to be bent along the outer sheath of the cable 32. Here, as described above, when the holding portion 40e is configured to contact the collective shield 32a, a part of the circuit board 22 is disposed within the holding portion 40e. In this case, if the holding portion 40e is bent along the outer sheath of the cable 32, the circuit board 22 may be bent due to the curvature of the holding portion 40e, which may result in damage. In response to this, by forming the holding portion 40e into a substantially triangular shape as shown in FIG. 5, the cable 32 can be held by the holding portion 40e while ensuring a space in which the circuit board 22 is disposed.

The joint between the holding portion 40e of the anchor 40 and the cable 32 may be bonded with an adhesive or the like. Here, it is preferable that the holding portion 40e and the collective shield 32a are soldered. This makes it possible to more reliably electrically connect the holding portion 40e and the collective shield 32a. In addition, by directly electrically connecting the anchor 40 and the collective shield 32a, it is possible to achieve lower resistance compared to connecting via another member, and it is possible to further improve noise resistance.

The arm portions 40a at the tip sides of the two plate-shaped portions 40c of the anchor 40 are each positioned so as to abut against the outer surface of the positioning wing 20b of the flange portion 20a of the sensor holder 20, and are fixed with adhesive. In the illustrated example, the arm portion 40a has a recess at the tip, and is adhesively fixed to the positioning wing 20b by filling this recess with adhesive.

The method of fixing the anchor 40 and the sensor holder 20 is not limited to the above example. For example, the anchor 40 and the sensor holder 20 may be fixed by configuring the arm portion 40a of the anchor 40 to have a claw portion curved inward at the tip, and this claw portion may engage with the flange portion 20a of the sensor holder 20. Alternatively, the arm portion 40a of the anchor 40 may have a convex or concave portion at the tip, and the flange portion 20a of the sensor holder 20 may have a concave or convex portion, and the convex portion and the concave portion may engage with each other.

In this way, by connecting the anchor 40 to both the sensor holder 20 and the cable 32, it is possible to prevent the connection between the connection terminal on the circuit board 22 and the signal line from being pulled when the cable 32 is pulled, for example, and thus prevent the connection between the connection terminal and the signal line from being broken.

There are no particular limitations on the material from which the anchor 40 is made, and various resin materials and metal materials used as components constituting the imaging module of an endoscope can be used. Metal materials are preferred from the viewpoint of heat dissipation and noise resistance. Considering processability, availability, strength, etc., stainless steel and copper alloys are preferred for the anchor 40.

The endoscope of the present invention has been described in detail above, but the present invention is not limited to the above aspects, and various improvements and modifications may be made without departing from the spirit and scope of the present invention.

For example, the space surrounded by the anchor 40 and the circuit board 22 may be filled with a filler such as an adhesive. Also, the anchor 40 may be configured to have a plate-shaped cover member arranged to span the sides of the two plate-shaped portions 40c of the anchor 40.

In the above example, the imaging surface of the imaging element 16 is arranged perpendicular to the optical axis of the lens, but the imaging surface of the imaging element 16 may be arranged parallel to the optical axis of the lens. In this case, a prism that bends light 90 degrees may be used as the optical member arranged between the imaging element 16 (cover glass 17) and the lens (lens barrel 14).

REFERENCE SIGNS LIST 1 endoscope system 2 endoscope 3 light source unit 4 processor unit 10 imaging device 14 lens barrel 16 imaging element 17 cover glass 18 optical member 20 sensor holder 20a flange portion 20b positioning blade 22 circuit board 26 ground terminal 27-30 connection terminal 32 cable 32a collective shield 32b outer sheath 33-36 coaxial cable 33a-36a coaxial shield 33b-36b coaxial outer sheath 33c-36c core wire 33d-36d core wire coating 38 solder joint 40 anchor 40a arm portion 40c plate portion 40e holding portion

Claims (7)

An endoscope having an insertion portion to be inserted into a subject,
a cable including one or more coaxial cables wired in the insertion portion and a collective shield covering an outer periphery of the one or more coaxial cables;
An endoscope, wherein a coaxial shield of the coaxial cable and the lumped shield are soldered together on the inside of the lumped shield. an imaging element that photoelectrically converts light incident on an imaging surface;
a circuit board on which the imaging element is mounted;
The endoscope according to claim 1 , wherein the collective shield is connected to a ground terminal of the circuit board. The endoscope according to claim 1 or 2, wherein the color of the outer sheath of the coaxial cable is the same as that of the core wire sheath that covers the core wire. a lens that forms an image of light on the imaging surface of the imaging element;
a lens barrel for holding the lens;
a sensor holder for holding the lens barrel;
The endoscope according to claim 2 , further comprising: an anchor for holding the cable relative to the sensor holder. The endoscope according to claim 4, wherein the anchor has a holding portion at the base end for crimping the cable. The endoscope according to claim 5, wherein the cross-sectional shape of the holding portion of the anchor is triangular. The endoscope according to claim 5 or 6, wherein the holding portion of the anchor is soldered to the collective shield.