JP2021037200A - Endoscope imaging device and endoscope - Google Patents

Abstract

To provide an endoscope imaging device and an endoscope that suppress an increase in size, and realize firm fixation.SOLUTION: An endoscope imaging device comprises a lens barrel inside which an imaging lens is provided, an imaging element for receiving light passed through the imaging lens and performing photoelectric conversion, at least one glass member arranged between the lens barrel and the imaging element, a holding member connecting the glass member and the lens barrel, a signal cable electrically connected to the imaging element, a connecting member holding the signal cable with respect to the holding member, and an engaging part engaging the holding member with the connecting member. The engaging part comprises at least one convex part provided in the holding member, and a concave part provided in the connecting member and engaged with the convex part of the holding member.SELECTED DRAWING: Figure 2

Description

The present invention relates to an endoscope imaging device and an endoscope for acquiring an image to be observed, and in particular, a holding member for connecting a glass member and a lens barrel, and a connecting member for holding a signal cable to the holding member. The present invention relates to an endoscope imaging device and an endoscope having an engaging portion for engaging the lens.

In recent medical treatment, diagnosis using an endoscope system including a light source device for an endoscope, an endoscope (endoscope scope), and a processor device is widely performed.
It has an insertion part that is inserted into the body of the subject, and the illumination light from the endoscope light source device irradiates the observation target through the insertion part. The endoscope generates an image signal by imaging an observation target irradiated with illumination light with an image pickup device. The processor device image-processes the image signal generated by the endoscope and generates an observation image for displaying on a monitor. The image sensor is electrically connected to the signal cable via the flexible wiring board, and the signal cable is electrically connected to the processor device. Regarding the endoscope, it is desired that the insertion portion inserted into the body of the subject is thin because the physical burden on the subject is small.

Further, the image sensor, the lens barrel, and the like are provided at the tip of the insertion portion, but the tip of the insertion portion is adjusted to the tip of the insertion portion in order to realize various shootings when using the endoscope. The tip of the insertion part can also be bent. In this case, since the tip of the insertion portion to be inserted into the body is bent with the image sensor, the lens barrel, and the like provided as described above, a force is applied to the joint portion of each member, and the joint portion is peeled off. Etc., it may be damaged. An endoscope with a strong joint has been proposed in order to suppress damage such as peeling.

For example, Patent Document 1 discloses an electronic endoscope provided with a connecting member that connects a lens barrel and a signal cable and covers at least one surface of a prism. In the electronic endoscope of Patent Document 1, the end portion of the cable cover of the signal cable is adhered to the inside of one end portion of the connecting member by an adhesive, and is formed on the flange portion of the lens barrel at the other end portion of the connecting member. A pair of claws are engaged. Therefore, even if the signal cable is pulled away from the connecting member, the joint between the signal cable and the circuit board does not peel off, or the signal cable does not break.

In Patent Document 2, an image area sensor that photoelectrically converts an optical image formed through a photographing lens, a flexible substrate electrically connected to the image area sensor, and a signal cable electrically connected to the flexible substrate. A connecting member for connecting the prism holder and the signal cable, the prism holder for holding the taking lens or the prism, and a claw portion which is fixed to the signal cable at one end and locked to the prism holder at the other end. And a ring member attached to at least a part of the outer periphery of the prism holder, and the ring member is fixed to the main body of the endoscope. This structure prevents the optical member holding portion from being deformed by an external force via the connecting member.

Japanese Unexamined Patent Publication No. 2012-157472 Japanese Unexamined Patent Publication No. 2016-158770

In both Patent Document 1 and Patent Document 2, the claw portion is used for fixing. When trying to firmly fix the claw portion by using the claw portion as in Patent Document 1 and Patent Document 2, since the claw portion is configured to be hooked, it is necessary to enlarge the claw portion, and the insertion portion of the endoscope becomes Increase in size. However, as described above, as an endoscope, a thin insertion portion is desired because the physical burden on the subject is small. As described above, it is difficult to realize a strong fixing without increasing the size by using the claw portion.

An object of the present invention is to provide an endoscope imaging device and an endoscope that suppress an increase in size and realize a firm fixation.

In order to achieve the above object, the present invention includes a lens barrel provided with an image pickup lens, an image pickup element that receives light that has passed through the image pickup lens and performs photoelectric conversion, and a lens barrel and an image pickup element. A signal cable is provided to at least one glass member, a holding member that connects the glass member and the lens barrel, an image pickup element, an electrically connected signal cable, and a holding member. It has a connecting member for holding, a holding member, and an engaging portion for engaging the connecting member, and the engaging portion is provided on the connecting member with at least one convex portion provided on the holding member. Further, the present invention provides an endoscopic imaging apparatus having a concave portion that engages with a convex portion of a holding member.

Two convex portions of the holding member are provided so as to face each other and sandwich the glass member, and the connecting member has a pair of arm portions facing each other, and a concave portion is provided at the tip of each arm portion. Is provided, and it is preferable that the concave portion at the tip of the arm portion of the connecting member engages with the convex portion of the holding member.
The convex portion of the holding member preferably covers at least a part of the side surface of the glass member.
At least one glass member has a prism whose incident surface and exit surface are orthogonal to each other, and the prism is arranged such that the incident surface faces the image pickup lens and the exit surface faces the image pickup element. , It is preferable that the prisms are arranged so as to face each other with a side surface orthogonal to the entrance surface and the exit surface of the prism.
It is preferable that the pair of arm portions is bent so that the tips thereof are closer to each other than the base end of the arm portions.
The recess preferably includes an opening that penetrates.
Further, the present invention provides an endoscope having the endoscope imaging device of the present invention.

According to the present invention, it is possible to provide an endoscopic imaging device capable of suppressing an increase in size and realizing a firm fixation, and an endoscope having an endoscopic imaging device.

It is a schematic perspective view which shows an example of the endoscope system which has the endoscope of embodiment of this invention. It is a schematic perspective view which shows the 1st example of the endoscope image pickup apparatus of the endoscope of the embodiment of this invention. It is a schematic perspective view which shows the 1st example of the endoscope image pickup apparatus of the endoscope of the embodiment of this invention. It is a schematic side view which shows the 1st example of the endoscope image pickup apparatus of the endoscope of the embodiment of this invention. It is a schematic perspective view which shows the connecting member of the 1st example of the endoscope image pickup apparatus of the endoscope of the embodiment of this invention. It is a schematic diagram which shows an example of the circuit board of the 1st example of the endoscope imaging apparatus of embodiment of this invention. It is a schematic perspective view which shows the 2nd example of the endoscope image pickup apparatus of the endoscope of the embodiment of this invention. It is a schematic side view which shows the 2nd example of the endoscope image pickup apparatus of the endoscope of the embodiment of this invention.

Hereinafter, the endoscope imaging apparatus and the endoscope of the present invention will be described in detail based on the preferred embodiments shown in the accompanying drawings.
It should be noted that the figures described below are exemplary for explaining the present invention, and the present invention is not limited to the figures shown below.
In addition, the angles and the like described below include error ranges generally allowed in the relevant technical field.

[Endoscope system]
The endoscope system irradiates an observation site such as the body of the subject to be observed with illumination light (not shown), images the observation site, and displays the observation site based on the image signal obtained by the imaging. It generates an image and displays the displayed image.
Here, FIG. 1 is a schematic perspective view showing an example of an endoscope system having an endoscope according to an embodiment of the present invention.
As shown in FIG. 1, the endoscope system 10 transmits an endoscope 12 that images an observation site in a living body (inside a subject) to be observed, and an illumination light that irradiates the observation site to the endoscope 12. A light source device for an endoscope (hereinafter, simply referred to as a light source device) 14 to be supplied, a processor device 16 that generates a display image of an observation site based on an image signal obtained by imaging, and a monitor 18 that displays the display image. It has. An operation input unit 19 such as a keyboard and a mouse is connected to the processor device 16.

The endoscope 12 includes an insertion portion 12a to be inserted into a subject such as the inside of a patient, and an operation portion 12b provided at a proximal end portion of the insertion portion 12a. In the endoscope 12, the insertion portion 12a side is the tip end side. A universal cord 12c is connected to the operation unit 12b of the endoscope 12. The universal cord 12c is connected to the light source device 14 via the connector 12d. Further, the light source device 14 and the processor device 16 are connected.
The processor device 16 receives the image signal output from the endoscope imaging device 20 (see FIGS. 2 and 3) of the endoscope 12 via the universal code 12c, generates a video signal, and outputs the video signal to the monitor 18. To do. As a result, a display image of an observation site such as the inside of the body is displayed on the monitor 18.
The operation unit 12b of the endoscope 12 is connected to the light source device 14 as described above. Light is supplied from the light source device 14 to the tip portion 12e of the endoscope 12, and light is emitted from the tip surface 12f. Further, the tip portion 12e of the endoscope 12 can perform a bending operation.
An angle knob 13a of the operation unit 12b is provided. When the user operates the angle knob 13a, the tip portion 12e bends and the tip portion 12e can be directed in various directions.

Further, in addition to the angle knob 13a, the operation unit 12b captures a forceps port for inserting a treatment tool, an air supply water supply button operated when supplying air or water from an air supply water supply nozzle, and a still image. A freeze button (not shown), a zoom operation unit 13b, and a mode changeover switch 13c are provided for this purpose. The zoom operation unit 13b is used when enlarging or reducing the observation target. The mode changeover switch 13c is used for switching the observation mode when the endoscope system 10 has a plurality of observation modes.

[First example of an endoscopic imaging device]
2 and 3 are schematic perspective views showing a first example of an endoscope imaging device for an endoscope according to an embodiment of the present invention. The orientation of the endoscopic imaging device is different between FIGS. 2 and 3, and different aspects are shown. FIG. 4 is a schematic side view showing a first example of an endoscope imaging device for an endoscope according to an embodiment of the present invention.
The endoscope imaging device 20 shown in FIGS. 2 and 3 is mounted on the tip portion 12e of the insertion portion 12a of the endoscope system 10 shown in FIG.
The endoscope image pickup device 20 acquires an image to be observed. For example, the lens barrel 22, the holding member 24, the image pickup element 25, and the circuit board 26 on which the image pickup element 25 is mounted are held. It has a connecting member 30 that holds the signal cable 28 with respect to the member 24. Further, the endoscope imaging device 20 has an engaging portion 32 that engages the holding member 24 and the connecting member 30.

The signal cable 28 is electrically connected to the image sensor 25, and the image sensor 25 is electrically connected to the processor device 16 (see FIG. 1) via the circuit board 26 and the signal cable 28. The signal cable 28 is arranged in the universal cord 12c (see FIG. 1). The configuration of the signal cable 28 is not particularly limited. The signal cable 28 is, for example, a multi-core cable in which a large number of signal lines 29 are bundled, a shield conductor is provided around the signal line 29, and the signal cable 28 is housed in a cylindrical outer skin. The signal line 29 has, for example, four lines. The number of signal lines is not particularly limited, and may be two, three, or five or more.

The lens barrel 22 is a tubular member, and an image pickup lens 23 for taking an image of an observation target is provided inside. The configuration of the image pickup lens 23 is not particularly limited, and may be a configuration having a plurality of lenses arranged side by side in the optical axis C direction, or a configuration having one lens.
Here, as shown in FIGS. 2 and 3, the direction parallel to the optical axis C is defined as the X direction. Of the two directions orthogonal to the optical axis C, one is the Y direction and the rest is the Z direction. The Y direction corresponds to the width direction of the endoscope imaging device 20, and the Z direction corresponds to the height direction of the endoscope imaging device 20.

The holding member 24 has a tubular mounting cylinder portion 24a fitted to the outer circumference of the lens barrel 22 and a base portion 24b continuously and integrally provided with the mounting cylinder portion 24a. A prism 34 is provided on the back surface 24e of the base portion 24b. The holding member 24 connects a glass member such as a prism 34 and a lens barrel 22.
The prism 34 is, for example, a right-angle prism in which the entrance surface 34a and the exit surface 34b are orthogonal to each other. The incident surface 34a is arranged toward the back surface 24e of the base 24b. As a result, the incident surface 34a faces the image pickup lens 23.
A cover glass 33 is arranged on the image sensor 25. The prism 34 is arranged on the cover glass 33, and the exit surface 34b of the prism 34 and the image sensor 25 face each other.
The cover glass 33 protects the light receiving surface (not shown) of the image sensor 25. The prism 34 guides the light that has passed through the image pickup lens 23 to the light receiving surface of the image pickup element 25.

The image pickup element 25 is provided on the surface 26a of one end of the circuit board 26 in parallel with the optical axis C of the image pickup lens 23, and is arranged below the base portion 24b of the holding member 24, for example. .. A plurality of connection terminals (not shown) for inputting / outputting signals or power to the image sensor 25 and the electronic component 36 are provided on the back surface 26b of the circuit board 26 opposite to the light receiving surface of the image sensor 25. ..

The circuit board 26 is made of a flexible substrate, for example, a flexible wiring board. As shown in FIGS. 2 to 4, the circuit board 26 is bent at two points and has a first curved portion 26c and a second curved portion 26d. Between the first curved portion 26c and the second curved portion 26d, for example, two electronic components 36 are provided on the surface 26a of the circuit board 26. For example, three electronic components 36 are provided on the surface 26a of the circuit board 26 continuous with the second curved portion 26d. The electronic component 36 will be described later.
By bending the circuit board 26 at two points and providing the first curved portion 26c and the second curved portion 26d, the size can be reduced in the X direction, and the endoscope imaging device 20 can be miniaturized in the X direction. Can be done. That is, the endoscopic imaging device 20 can be shortened. As shown in FIG. 4, the signal line 29 of the signal cable 28 is electrically connected to a connection terminal (not shown) provided on the back surface 26b of the other end of the circuit board 26.
The bending of the circuit board 26 is not limited to two places, but is appropriately determined depending on the device configuration such as the number of electronic components 36 or the size of the device.

The image sensor 25 receives the light that has passed through the image sensor 23 and performs photoelectric conversion. The image sensor 25 obtains an image pickup signal by photoelectric conversion of the optical image to be observed.
In the endoscope imaging device 20, at least one glass member is arranged between the lens barrel 22 and the imaging element 25. The at least one glass member is, for example, the cover glass 33 and the prism 34 described above. However, the at least one glass member is not particularly limited to the cover glass 33 and the prism 34 described above.

The engaging portion 32 has at least one convex portion provided on the holding member 24 and a concave portion provided on the connecting member 30 that engages with the convex portion of the holding member 24. In the engaging portion 32, the convex portion of the holding member 24 and the concave portion of the connecting member 30 are engaged with each other, so that the holding member 24 and the connecting member 30 can be firmly fixed. The recess of the connecting member 30 also includes an opening through which will be described later.

The base portion 24b of the holding member 24 shown in FIGS. 2 and 3 is provided with two convex portions facing each other and sandwiching the prism 34. The two convex portions 24c and 24d cover a part of the side surface 34c of the prism 34, and the prism 34 is sandwiched between the two convex portions 24c and 24d to fix the prism 34. The side surface 34c of the prism 34 is a surface orthogonal to the entrance surface 34a and the exit surface 34b.
In the holding member 24, the convex portion 24c (see FIG. 2) of the base portion 24b is, for example, a quadrangle. The convex portion 24d (see FIG. 3) of the base portion 24b is, for example, a pentagon. By making the two convex portions different shapes, it is easy to grasp the orientation of the holding member at the time of assembly. Further, by pressing the prism against the larger convex portion, the prism can be easily positioned and easily assembled.

The connecting member 30 holds the signal cable 28 with respect to the holding member 24.
Here, FIG. 5 is a schematic perspective view showing a connecting member of a first example of an endoscope imaging device for an endoscope according to an embodiment of the present invention.
As shown in FIG. 5, the connecting member 30 has an arc formed by bending one plate member and a holding portion 40a having a flat plate-shaped base material portion 40f continuous with the arc. In the connecting member 30, the holding portion 40a side is the base end 41a. When the base material portion 40f is crimped so as to press the signal cable 28, the base material portion 40f is bent along the outer skin of the signal cable 28.
An arm portion 40b is provided on each of the flat plate-shaped base material portions 40f facing each other with the opening in the holding portion 40a. The connecting member 30 has a pair of arm portions 40b. The arm portion 40b is bent outward from the holding portion 40a on the base end 41a side and then extends linearly. Therefore, the distance between the pair of arm portions 40b is wider at the tip end 41b than at the base end 41a, and this distance is appropriately determined according to the convex portion of the holding member 24. Further, each arm portion 40b is provided with openings 40c and 40d at the tip 41b.

The opening 40c of the arm portion 40b engages with the convex portion 24c of the holding member 24. The opening 40d of the arm portion 40b engages with the convex portion 24d of the holding member 24. The shape of the opening 40c is the same in size and shape as the outer shape of the convex portion 24c. Further, the shape of the opening 40d is the same in size and shape as the outer shape of the convex portion 24d.
Here, the shape of the opening 40c described above has the same size and shape as the outer shape of the convex portion 24c, and the shape of the opening 40d has the same size and shape as the outer shape of the convex portion 24d. Being includes the error range generally tolerated in the art. Therefore, the opening 40c and the convex portion 24c may be any of so-called gap fit, intermediate fit, and tight fit. The opening 40d and the convex portion 24d may also be a gap fit, an intermediate fit, or a tight fit.
In the following description, "the same size and shape" includes the error range generally allowed in the relevant technical field as described above.

As described above, since the concave portion is fitted in the convex portion due to the configuration having the engaging portion 32 that engages the opening portions 40c and 40d of the pair of arm portions 40b and the convex portions 24c and 24d of the holding member 24. The length of the endoscope imaging device 20 in the Y direction orthogonal to the optical axis C can be shortened, and the size of the endoscope imaging device 20 can be suppressed from increasing in size. Moreover, the holding member 24 and the connecting member 30 can be firmly fixed.
When the thickness of the arm portion 40b is matched with the height of the convex portions 24c and 24d so that the openings 40c and 40d of the pair of arm portions 40b are engaged with the convex portions 24c and 24d of the holding member 24, respectively. The length of the endoscope imaging device 20 in the Y direction orthogonal to the optical axis C can be further shortened, and this configuration makes it possible to further reduce the size of the endoscope imaging device 20.

In the connecting member 30, the pair of arm portions 40b is preferably bent so that the tip end 41b is closer to each other than the base end 41a of the arm portion 40b. That is, it is preferable that the pair of arm portions 40b is bent in the closing direction. As a result, by expanding the arm portion 40b once, the openings 40c and 40d of the arm portion 40b can be fitted into the convex portions 24c and 24d of the holding member 24, and can be easily assembled.
As described above, the pair of arm portions 40b is preferably bent so that the tip end 41b is closer to each other than the base end 41a of the arm portion 40b, but this is the state of the parts before assembly. Good,
Further, the arm portion 40b is provided with openings 40c and 40d that penetrate, but the present invention is not limited to this, and a recess that does not penetrate and has a bottom only by a recess may be used.
The connecting member 30 is held by attaching the signal cable 28 to the inside 40e of the holding portion 40a. The method of attaching the signal cable 28 is not particularly limited as long as the signal cable 28 does not come off from the holding portion 40a and the signal line 29 does not come off when the endoscope is used. It is attached using an adhesive.

In the holding member 24, the two convex portions 24c and 24d may have different sizes and shapes as described above, and may have the same size and shape, that is, may be congruent.
Further, in the holding member 24, the shape of the convex portion is not particularly limited to the above-mentioned quadrangle and pentagon, and may be a polygon such as a circle, an ellipse, a triangle or a hexagon, and these shapes are combined. The shape may be made. Further, not only one shape but also a plurality of shapes having the same shape may be arranged, or a specific pattern may be used.
In the engaging portion 32, one convex portion and one concave portion are engaged at one portion, but the engaging portion is not limited to one, and a plurality of engaging portions are engaged with one convex portion. It may have a structure having a part.

The size of the convex portion of the holding member is preferably a size that covers at least a part of the side surface 34c of the prism 34, for example. By setting the size of the convex portion so as to cover at least a part of the side surface 34c of the prism 34, the prism 34 can be more stably sandwiched and fixed, and the prism 34 can be held and fixed with respect to the holding member at the time of assembly. It can be used for positioning the prism in the Y direction.
The upper limit of the size of the convex portion of the holding member can be a size that covers the entire side surface 34c of the prism 34.
Further, in the holding member 24, the convex portion 24c and the convex portion 24d are provided so as to face each other, so that the prism 34 and the circuit board 26 are surrounded by the arm portion 40b. As a result, the engagement between the holding member 24 and the connecting member 30 is stable, and the prism 34 and the circuit board 26 can be protected.
The holding member 24 is configured to have two convex portions 24c and 24d, but the present invention is not limited to this, and three or more convex portions may be provided as long as the size is not increased. That is, the number of engaging portions may be 3 or more.

The prism 34 guides the light of the image pickup lens 23 to the image pickup element 25, and is not limited to the right-angle prism. The shape of the prism 34 is also appropriately used according to the arrangement position of the image pickup element 25. The prism 34 is not always necessary depending on the arrangement position of the image sensor 25.

As the image sensor 25, a CCD (Charge Coupled Device) type image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor can be used. For example, by using a prism 34 that bends the optical axis C of the image pickup lens 23 at a right angle, the degree of freedom in the arrangement position of the image pickup element 25 can be increased, and the size of the base portion 24b of the holding member 24 is not limited. A large image sensor 25 can be used.
After the holding member and the prism are adhesively fixed, they are sandwiched by the arm portion from the side surface, and the arm portion, the holding member, and the prism are connected by adhesion. The joint between the holding member and the prism is also strengthened by adhering the arm portion from the side surface. Further, by adhering not only the side surface of the holding member but also the side surface of the prism and the arm portion, the fixing strength of the arm portion is increased.
The connection strength between the holding member and the arm portion is such that the convex portion and the opening (concave portion) have the same shape and the same size, and the forces in the X and Z directions are received by the cross section of the arm portion. The mechanical strength of the endoscopic imaging device 20 is increased. On the other hand, when the claw portion is used for fixing as in Patent Document 1 and Patent Document 2 described above, when the tip portion of the insertion portion of the endoscope is bent and a force in the X direction is applied. The claws open and come off.

<Circuit board>
Next, the circuit board 26 will be described.
FIG. 6 is a schematic view showing an example of a circuit board of a first example of the endoscope imaging device according to the embodiment of the present invention. Note that FIG. 6 shows the circuit board 26 in a state before being bent.
In the circuit board 26, for example, as shown in FIG. 6, the image sensor 25 and the electronic component 36 are arranged at predetermined positions on the surface 26a. For example, at the other end of the circuit board 26, the back surface 26b and the shield conductor (not shown) of the signal cable 28 are joined, for example, by soldering. The signal line 29 of the signal cable 28 is electrically connected to a connection terminal (not shown) provided on the back surface 26b.
By joining the shield conductor of the signal cable 28 to the back surface 26b, the heat generated from the image sensor 25 and the electronic component 36 can be exhausted from the circuit board 26 via the signal cable 28, and the endoscopic image pickup device can be used. The heat dissipation of 20 can be improved.

In FIG. 6, for example, an image sensor 25 and two electronic components 36 are provided on the surface 26a of the circuit board 26 with a first bending region 27a, and the two electronic components 36 and the signal cable 28 side. The three electronic components 36 of the above are provided with a second bending region 27b open. The first bending region 27a corresponds to the first bending portion 26c, and the second bending region 27b corresponds to the second bending portion 26d.
In the circuit board 26, the first bending region 27a is bent so that the image sensor 25 and the electronic component 36 face each other, and the second bending region 27b is bent so that the back surface 26b of the circuit board 26 faces each other. As a result, the circuit board 26 has a configuration having a first curved portion 26c and a second curved portion 26d as shown in FIGS. 2 to 4.

The electronic component 36 is for driving the image pickup device 25, and is not particularly limited, and examples thereof include a regulator, a resistor, and a capacitor.

[Second example of endoscopic imaging device]
The endoscope imaging device 20 is not limited to the configuration shown in FIGS. 2 to 4. Hereinafter, a second example of the endoscopic imaging device will be described.
FIG. 7 is a schematic perspective view showing a second example of the endoscope imaging device of the endoscope according to the embodiment of the present invention, and FIG. 8 is an endoscope imaging device of the endoscope according to the embodiment of the present invention. It is a schematic side view which shows the 2nd example of.
In FIGS. 7 and 8, the same components as the endoscope imaging device 20 shown in FIGS. 2 to 4 and the connecting member 30 shown in FIG. 5 are designated by the same reference numerals, and detailed description thereof will be omitted.

The endoscope image pickup device 21 shown in FIGS. 7 and 8 has a circuit board 50 configuration and an arrangement of the image pickup element 25 and the cover glass 33 as compared with the endoscope image pickup device 20 shown in FIGS. The difference is that the prism 34 is not provided. Other than that, the configuration is the same as that of the endoscope imaging device 20 shown in FIGS. 2 to 4.

In the endoscope imaging device 21 shown in FIGS. 7 and 8, the circuit board 50 is provided with a support portion 50b perpendicular to the flat plate-shaped base portion 50a. The image sensor 25 is provided on the support surface 50d of the support portion 50b. A cover glass 33 is provided on the image sensor 25, and a light receiving surface (not shown) is covered with the cover glass 33.
The cover glass 33 is arranged on the back surface 24e of the base portion 24b of the holding member 24, and the image pickup device 25 is arranged with the light receiving surface (not shown) facing the image pickup lens 23.
The surface 50c of the circuit board 50 is provided with a plurality of connection terminals (not shown) for inputting / outputting signals or electric power to the image sensor 25 and the electronic component 36. The signal line 29 of the signal cable 28 is electrically connected to the connection terminal on the surface 50c of the circuit board 50.
The configuration of the circuit board 50 is not particularly limited, and may be a flexible wiring board or a rigid board. A printed wiring board can be used as the rigid board.

The endoscopic imaging device 21 shown in FIGS. 7 and 8 can also obtain the same effect as the endoscopic imaging device 20. The endoscope imaging device 21 also has a convex portion and a concave portion due to a configuration having an engaging portion 32 that engages the openings 40c and 40d of the pair of arm portions 40b and the convex portions 24c and 24d of the holding member 24. Therefore, the length of the endoscope imaging device 20 in the Y direction orthogonal to the optical axis C can be shortened, and the size of the endoscope imaging device 20 can be suppressed from increasing. Moreover, the holding member 24 and the connecting member 30 can be firmly fixed.

The present invention is basically configured as described above. Although the endoscope imaging device and the endoscope of the present invention have been described in detail above, the present invention is not limited to the above-described embodiment, and various improvements or changes are made without departing from the gist of the present invention. Of course, it may be.

10 Endoscope system 12 Endoscope 12a Insertion part 12b Operation part 12c Universal cord 12d Connector 12e Tip part 12f Tip surface 13a Angle knob 13b Zoom operation part 13c Mode changeover switch 14 Light source device 16 Processor device 18 Monitor 19 Operation input part 20 , 21 Endoscope Imaging device 22 Lens lens barrel 23 Imaging lens 24 Holding member 24a Mounting cylinder 24b Base 24c, 24d Convex 24e Back surface 25 Imaging element 26 Circuit board 26a Front surface 26b Back surface 26c First curved part 26d Second Curved part 27a First bending area 27b Second bending area 28 Signal cable 29 Signal line 30 Connecting member 32 Engaging part 33 Cover glass 34 Prism 34c Side surface 36 Electronic component 40a Holding part 40b Arm part 40c Opening 40d Opening 40e Inner 40f Base material 41a Base end 41b Tip 50 Circuit board 50a Base 50b Support 50c Surface 50d Support surface C Optical axis

Claims (7)

A lens barrel with an imaging lens inside and
An image sensor that receives light that has passed through the image pickup lens and performs photoelectric conversion.
At least one glass member arranged between the lens barrel and the image sensor,
A holding member that connects the glass member and the lens barrel,
The image sensor, an electrically connected signal cable, and
A connecting member that holds the signal cable with respect to the holding member, and
It has an engaging portion that engages the holding member and the connecting member, and has an engaging portion.
The engaging portion has at least one convex portion provided on the holding member and a concave portion provided on the connecting member that engages with the convex portion of the holding member. apparatus. Two convex portions of the holding member are provided so as to face each other and sandwich the glass member.
The connecting member has a pair of arm portions facing each other, and the recess is provided at the tip of each of the arm portions.
The endoscopic imaging apparatus according to claim 1, wherein the concave portion at the tip of the arm portion of the connecting member engages with the convex portion of the holding member. The endoscopic imaging apparatus according to claim 1 or 2, wherein the convex portion of the holding member covers at least a part of a side surface of the glass member. The at least one glass member has a prism whose incident surface and exit surface are orthogonal to each other, and the prism is arranged such that the incident surface faces the image pickup lens and the exit surface faces the image pickup element.
The endoscopic imaging apparatus according to claim 2 or 3, wherein the convex portions of the holding member are arranged so as to face each other with a side surface orthogonal to the entrance surface and the exit surface of the prism. The endoscopic imaging apparatus according to any one of claims 2 to 4, wherein the pair of arm portions is bent so that the tips thereof are closer to each other than the base end of the arm portions. The endoscopic imaging apparatus according to any one of claims 1 to 5, wherein the recess includes an opening through which the recess is formed. An endoscope having the endoscope imaging device according to any one of claims 1 to 6.