JP2003033322A - Endscope device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endscope device capable of easily and surely conducting the addition or the exchange of a subsidiary circuit substrate equipped with input and output terminals having desired functions to a parent circuit substrate. SOLUTION: The endscope device comprises a video processor 6 provided with a device body 10 having the built-in parent circuit substrate 20 equipped with a signal processing circuit, and the like, and the subsidiary circuit substrate 30 equipped with an input-output terminal 32 capable of electrically connecting to the parent circuit substrate 20 and changing the function of the video processor 6. In the endscope device, notch parts 17, 18 are formed for an opening 23a for the arrangement of the subsidiary circuit substrate 30 in a bottom panel 10c and a rear panel 10b to constitute the device body 10. The notch parts 17, 18 are closed, and a panel-constituting part 33 and a bottom closing member 25 which are integrally fixed to the device body 10, are provided. The subsidiary circuit substrate 30, panel-constituting part 33 and the bottom-closing member 25 are fixedly provided with prescribed fastening members 41, 42, 43, different from the fastening members to fix other members constituting the video processor 6, at prescribed positions.

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an endoscope apparatus provided with a processor capable of adding or replacing a circuit board having input / output terminals. 2. Description of the Related Art In recent years, endoscopes capable of observing a target site by inserting an elongated insertion portion into a body cavity or the like, and performing various examinations, treatments, and the like have been widely used. In an electronic endoscope provided with an image pickup device such as a CCD at an insertion portion, image processing is performed such that an endoscopic image is displayed on a monitor screen for observation or an image for diagnosis after inspection is recorded. An endoscope apparatus is provided with a video processor for performing the operation. [0003] Also, when an optical endoscope such as a rigid endoscope or a fiberscope is used, an endoscope image is displayed on a monitor screen for observation, and an image for diagnosis after inspection is recorded. In response to this demand, some endoscope apparatuses are provided with a camera head that can be attached to the eyepiece of the optical endoscope and a video processor that performs image processing. [0004] In recent years, video processors have been reduced in size, but with increasing functionality, it has become necessary to add or replace circuit boards, and by adding new circuit boards, it is necessary to connect external equipment. The number of input / output terminals also increases.
Therefore, the processor device may be miniaturized by stacking and arranging a plurality of circuit boards, or the processor device may be miniaturized by adopting a structure in which input / output terminals are provided directly on the circuit board and exposed to the outer surface of the device main body. I was [0005] However, when a circuit board having input / output terminals is added to a processor device, an opening is provided in a side surface of the device body like a personal computer, and the circuit board is added from the side. In the case of adopting a structure, a relay board is required to electrically connect the added circuit board to the parent board. As a result, the position of the connector for connecting to the parent board is restricted, so that the degree of freedom in the layout of the board is reduced. Further, it is necessary to provide a separate means for reliably grounding the board ground. Was likely to occur. In order to solve this problem, a structure is conceivable in which an opening is provided in the upper surface of the main body of the apparatus, and a circuit board is added from the upper opening and fixed with screws or the like. In order to prevent the intrusion of the liquid, a packing, a guide groove, and the like must be provided, which may increase the cost. Also, when adding or replacing boards,
In order to disassemble the top cover, the back panel, and the like, it is necessary to remove a number of screws, which are fastening members. [0007] In order to solve these problems, Japanese Patent Application No. 200-200
The applicant of Japanese Patent Application No. 0-249652 proposes a medical electrical device in which an opening is provided on the bottom side. However, in this medical electrical device, when the opening is provided on the bottom surface, the input / output terminals are incorporated in the device in advance, that is, since the input / output terminals are provided in advance in the device main body, the number and functions of the input / output terminals Is limited. In addition, since this opening is set at a position and size that does not touch the primary circuit of the processor device, it has been difficult to reduce the size of the device. The present invention has been made in view of the above circumstances, and is intended to add or replace a child circuit board having desired functions provided with input / output terminals for connection to an external device to a parent circuit board. It is an object of the present invention to provide an endoscope apparatus that can be easily and reliably performed. [0009] An endoscope apparatus according to the present invention comprises:
An endoscope and a processor unit to which the endoscope is connected and which is provided with a parent circuit board provided with at least a signal processing circuit and the like in the apparatus main body, and an input / output terminal provided on the parent circuit board An endoscope apparatus comprising: an external device capable of changing a function of the processor unit by electrically connecting a sub-circuit board; and a bottom panel and a rear panel constituting a device main body of the external device. A notch portion forming an opening for arranging the sub-circuit board, a cover member that is closed with the notch portion, and is integrally fixed to the apparatus main body, and the sub-circuit board and The lid member is fixed to a predetermined position with a predetermined fastening member different from a fastening member for fixing other members constituting the processor device. According to this configuration, by removing and attaching the predetermined fastening member, it is possible to add or replace a sub-circuit board having input / output terminals for connection to an external device and having a desired function. Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 12 relate to an embodiment of the present invention. FIG. 1 is a diagram illustrating a configuration of an endoscope system, FIG. 2 is a top view illustrating a video processor, and FIG. 3 is a cross-sectional view illustrating a video processor. FIG. 4 is a view for explaining a child circuit board, FIG. 5 is a perspective view for explaining an opening for arranging a child circuit board formed on a video processor, and FIG. 6 is a view for arranging a child circuit board formed on a video processor. FIG. 7 is a diagram illustrating the mounting of the sub-circuit board, FIG. 8 is a diagram illustrating the mounting state of the sub-circuit board, FIG. 9 is a diagram illustrating another example of the predetermined fastening member, FIG.
FIG. 11 is a diagram illustrating another configuration of the bottom surface closing member, FIG. 11 is a diagram illustrating another configuration of the rear panel component of the sub-circuit board, and FIG. 12 is a diagram illustrating an attached state of the rear panel component of FIG. It is. An endoscope system 1 shown in FIG. 1 performs an electronic endoscope 2 having an image pickup means, a light source device 3 for supplying illumination light to the electronic endoscope 2, and a signal processing for the image pickup means. A video processor (or a video signal processing device) 6 having a processor unit for generating a video signal, a color monitor 8 connected to the video processor 6 for displaying a video, an electronic endoscope 2 and a light source device 3; It comprises a signal transmission cable 7 for transmitting a signal to the video processor 6. The signal transmission cable 7 is connected to the electronic endoscope 2
It has an endoscope connection connector 7a for connecting to the video processor 6 and a video processor connection connector 7b for connecting to the video processor 6 at both ends. The electronic endoscope 2 has an elongated insertion section 2a for insertion into a living body, an operation section 2b provided at the rear end of the insertion section 2a, and a side extending from the operation section 2b. And the issued universal cord 2c. An integrated connector 2d is provided at the end of the universal cord 2c. In this embodiment, the endoscope system 1 in which the light source device 3 and the video processor 6 are separate from each other is shown. However, the light source unit and the processor unit are integrally provided in the video processor. You may. As shown in FIG. 2, a primary circuit 11 such as a power supply unit and a signal processing circuit (not shown) electrically insulated from the primary circuit 11 are provided in an apparatus main body 10 of the processor 6. A secondary circuit 12 having a parent circuit board 20 composed of one or more circuit boards is provided, and the primary circuit 11 and the secondary circuit 12 are provided for miniaturization.
And close proximity. The mother circuit board 20 is provided with a connector 21 to which a child circuit board (reference numeral 30 shown in FIG. 4) described later is electrically connected. Reference numeral 13 denotes a connector provided on the front panel 10a of the apparatus main body 10 to which the video processor connection connector 7b provided on the signal transmission cable 7 is connected. Reference numeral 15 denotes an exhaust port formed by inwardly bending the side surface of the primary circuit 11 which is the other side of the apparatus main body 10. Reference numeral 16 denotes a cooling fan that discharges the air inside the apparatus main body 10 from the exhaust port 15 and takes in the outside air from the intake port 14. As shown in FIG. 3, a parent circuit board 20 composed of, for example, two circuit boards is arranged at a predetermined position in the apparatus main body 10 of the processor 6. This device body 10
On the rear panel 10b side, various input / output terminals 22,..., 22 electrically connected to the parent circuit board 20 are protruded. In a notch portion on the back side of the back panel 10b, which will be described later, a back panel member 24 formed of a bent plate member constituting a cover member is a first fastening member which can be fastened by a hexagon wrench. Hex Socket Head Cap Screw 4
1 detachably fixed. Further, a thin plate-shaped bottom closing member 25 constituting a lid member is attached to and detached from a bottom cutout portion of the bottom panel 10c, which will be described later, by a second hexagon socket head bolt 42 which is a predetermined fastening member which can be fastened by a hexagon wrench. It is fixed freely. Further, between the parent circuit board 20 and the bottom surface closing member 25, a child board arrangement space portion (hereinafter abbreviated as a space portion) 23 for additionally arranging the child circuit board 30 is provided. Reference numeral 26 denotes a spacer for maintaining the distance between the substrates at a predetermined interval and fixing the circuit substrate. Further, the predetermined fastening member is a hexagon socket head cap screw that can be fastened by a hexagon wrench, and a fastening member for fixing another member constituting the video processor 6 is different from the predetermined fastening member in FIG. A Phillips screw tightened by a Phillips screwdriver arranged on the rear panel 10b shown, a nut tightened by a box wrench (not shown), and the like are used. As shown in FIG. 4, a sub-circuit board 30 disposed in the space 23 includes a board section 31 provided with a circuit having a predetermined function, and various input / output ports which can be connected to a predetermined external device. , 32 are arranged at desired positions and have a rear panel component 33 having the same shape as the rear panel component 24. The rear panel constituting portion 33 is provided with a fastening protrusion 34, and a female screw with which the first hexagon socket head bolt 41 is screwed is formed at the fastening protrusion 34 and at a predetermined position. A through hole 35 is formed. In addition, the four corners of the board part 31 of the sub-circuit board 30 are
A through hole 36 through which a third hexagon socket head cap screw, which will be described later, which is a predetermined fastening member for fixing 0 is inserted. Conductive portions 37 for GND grounding are provided around the back surface of these through holes 36, respectively. When the function of the video processor 6 is changed by adding the child circuit board 30 to the master board 20, first,
As shown in FIG. 5, the video processor 6 is turned over, the bottom panel 10c is turned upward, and the plurality of hexagon socket head bolts 41 and 42 arranged at predetermined positions are removed using a hexagon wrench. Next, the bottom surface closing member 25 is removed from the bottom panel 10c, and the back panel constituting member 24 is removed from the back panel 10b. Then, as shown in FIGS. 5 and 6, an opening 23 a constituted by the rear side cutout portion 17 and the bottom side cutout portion 18 communicating with the space portion 23 appears. In FIGS. 5 and 6, reference numeral 19a denotes a through hole through which the first hexagon socket head bolt 41 for fixing the rear panel component 24 to the rear panel 10b passes, and reference numeral 19b denotes a bottom closing member. 25 to the bottom panel 10
c is a through hole formed with a female screw to which the second hexagon socket head cap screw 42 is screwed. Reference numerals 24a and 24b denote a fastening projection formed similarly to the reference numerals 34 and 35, and Reference numeral 25a denotes a through hole through which the second hexagonal bolt 42 for fixing the bottom surface closing member 25 to the bottom panel 10c is inserted. Reference numeral 27 denotes an elastic conductive member that electrically contacts the bottom panel 10c. Reference numeral 27 denotes a board fixing portion for disposing the parent circuit board 20 and the child circuit board 30 at predetermined positions, and a space 23 and the primary circuit 11. It is a plate member that also serves as a partition that closes the communication portion to prevent contact with the primary circuit from the space 23 side and prevents a fastening member or the like from dropping into the primary circuit 11 or the like. FIG. 6 shows a structure in which the plate member 27 is disposed on the bottom panel 10c.
Instead of being formed as a separate member from the bottom panel c, a configuration may be adopted in which it is drawn out from the bottom panel 10c and provided integrally. Next, as shown in FIGS. 7 and 8, the slave circuit board 30 is prepared, and the connector 38 for connecting the slave circuit board 30 is connected to the master circuit board 2 through the opening 23a.
After that, the sub-circuit board 30 is fastened and fixed to the spacer 26 with a third hexagon socket bolt 43 as a predetermined fastening member, and the first hexagon socket bolt 41 is inserted into the through hole 19a. Then, the rear panel component 33 of the sub-circuit board 30 is integrally fixed to the rear panel 10b by being screwed into a female screw formed in the through hole 35. As a result, a part of the rear panel component 33 and a part of the rear panel 10b abut, and
The sub-circuit board 30 and the spacer 26 come into contact with each other, and the ground state is established. Next, as shown in FIGS. 7 and 8, the bottom surface closing member 25 is prepared, and the second hexagon socket head cap screw 42 is provided.
Is screwed into a female screw formed in the through hole 19b through the through hole 25a, and the bottom surface closing member 25 is integrally fixed to the bottom panel 10c. Thus, the elastic conductive member 25b comes into surface contact with the bottom panel 10c. Finally, the video processor 6 is turned over again to bring the bottom panel 10c into a predetermined state in which the lower panel 10c is disposed on the lower side, and the function change of the video processor 6 for adding the child circuit board 30 to the master board 20 is completed. I do. As described above, the back side cutout portion provided on the back panel and the bottom side cutout portion provided on the bottom panel form an opening which communicates with the sub-board arrangement space of the video processor. With the structure in which the board is added, the opening can be realized with an inexpensive configuration, the circuit board can be easily added and replaced, and the degree of freedom of the board layout can be greatly improved. Further, the rear panel constituting portion for closing the rear side cutout portion and the rear panel constituting member are fixed to the rear panel with a predetermined fastening member, and the bottom closing member closing the bottom side notch portion is provided on the bottom surface with a predetermined fastening member. The structure to fix to the panel and the structure to fix the child circuit board with a predetermined fastening member make it easy and reliable to add the child circuit board to the parent circuit board and change the function of the video processor. It can be carried out. Further, by arranging a plate member also serving as a partition around the sub board arrangement space, it is possible to reliably prevent contact with the primary circuit and dropping of a fastening member or the like on the primary circuit side. . As shown in FIG. 9, a predetermined fastening member is replaced with a hexagon socket head bolt 41, 42, 43 or the like, as shown in FIG.
A fastening screw 45 having a may be used. Further, as shown in FIG. 10, a bent portion 25c is provided at an end of the bottom surface closing member 25 so that the bottom surface closing member 25 is integrally fastened and fixed to the bottom panel 10c with a predetermined fastening member. The floating by the elastic conductive member 25b is prevented. Further, as shown in FIG. 11, for example, two substantially U-shaped concave portions 33a are provided at predetermined positions on the lower surface side of the rear panel constituting portion 33 constituting the sub-circuit board 30, and these concave portions 33a are formed on the rear surface as shown in FIG. By providing a recessed fastening portion 48 formed by a shaft portion 48a and a flange portion 48b provided at a position corresponding to the recessed portion 33a on the inner surface of the panel 10b, the child circuit board 30 can be provided without using a fastening member. Can be arranged on the back panel 10b. At this time, by arranging the elastic conductive member 47 so as to abut on the L-shaped member 46 provided on the back panel 10b so as to abut on the front end of the back panel component 33, the child can be used without using a fastening member. When the circuit board 30 is disposed on the back panel 10b, a GND ground state can be reliably obtained. In addition, the back panel component 24 may be provided with a recess 33a. Here, an example of a configuration in which a plurality of circuit boards are stacked in the video processor 6 will be described. For example, FIG.
As shown in FIG. 3A, spacers 52 are arranged between the circuit boards 51, 51,.
The screw 53 is screwed into the female screw portion of the second
There is a configuration example in which 1, 51,. FIG.
As shown in (b), instead of the spacer 52, a resin spacer 54 having protrusions at both ends is prepared, and this protrusion is pressed into the circuit boards 51, 51,.
There is a configuration example in which 1, 51,. Further, FIG.
As shown in (c), a spacer 55 having a convex portion formed with a male screw at one end and a concave portion formed with a female screw with which the male screw is screwed is provided at the other end of the spacer 55.
There is a configuration example in which a plurality of circuit boards 51, 51,... Are arranged between the circuit boards 51 and stacked. However, the configuration examples shown in FIGS. 13A and 13C require a large number of fastenings, so that there is a problem that assembling and disassembling require a lot of man-hours. In addition, in the configuration example of FIG. 13B, the use of the resin spacer 54 may cause a problem in noise suppression. Further, in the configuration examples of FIGS. 13A and 13B, since the upper and lower spacers 52 and 54 must be arranged at different positions, there is a problem that it is difficult to reduce the size of the circuit board 51. Further, in the configuration example of FIG. 13C, there is a problem that the manufacturing cost of the spacer 55 is increased. For this reason, there has been a demand for a circuit board laminated structure that can be stacked and arranged with an inexpensive configuration, can reduce the size of the circuit board, and can reliably ground the GND. 14 to 17 are diagrams for explaining a circuit board laminated structure. FIG. 14 is a diagram for explaining the structure of the circuit board. FIG. 15 is a diagram for explaining the circuit board laminated state. FIG. FIG. 17 is a diagram illustrating a configuration example in which two circuit boards are stacked and arranged. As shown in FIG. 14, four pillars 71 shown in FIG.
Are formed through holes 61 having a diameter of φa. Around the periphery of the through hole 61 on the front surface side and the back surface side of the circuit board 60, conductive portions 62a concentric with the through hole 61 and having a diameter larger by a predetermined size than the through hole are formed.
62b is provided. And these conductive parts 62a, 6
2b are electrically connected to each other to form a so-called through hole 6.
2 are formed. As shown in FIG. 15, the support member 70 is provided with a column 71 having an outer diameter slightly smaller than the diameter of the through hole 61. A concave portion 72 having a female screw is provided at an end of the column 71. When a plurality of circuit boards 60 are stacked, first, the through holes 61 of the first circuit board 60 are inserted into the columns 71, and then the through holes 81 through which the columns 71 are inserted. The pipe-shaped spacers 80 formed with are formed on the circuit boards 60 by passing through the respective columns 71. After that, the second circuit board 60 is inserted into the column 71 so as to be placed on the pipe-shaped spacer 80, and the pipe-shaped spacer 80 and the circuit board 60 are inserted and arranged in sequence to penetrate the fourth circuit board 60. When the hole 61 is inserted through the column 71, the fixing screw 83 is screwed into the female screw of the recess 72. At this time, the projecting height Hs of the column 71
And a distance Hn between both end surfaces of the substrate, which is a distance from the lower end surface of the first substrate to the upper end surface of the fourth substrate in a state where the four substrates 60 are stacked, and 3 from the lower end surface of the first substrate. The relationship of Hn ≧ Hs> Hn−t is established between the distance Hn−t to the upper end surface of the second pipe-shaped spacer 80. For this reason, when all the boards 60 are stacked and arranged via the pipe-shaped spacer 80, the upper end face of the fourth circuit board 60 is at least flush with the upper end face of the column 71,
Or higher. Therefore, the fixing screw 83 is connected to the support 71
When screwed into the female screw formed in the concave portion 72 of
The four circuit boards 60 are integrally fixed.
At this time, the conductive portions 62a and 62b provided on the substrates 60,... That is, while the support 71 is provided with the support 71, the circuit board 60, the pipe-shaped spacer 80, the circuit board 60,... Are arranged on the support 71 in this order, and the last circuit board 60 is provided on the support 71. Then, the fixing screw 83 is
2 by screwing the conductive portions 62 a and 62 b provided on each substrate 60 and the pipe-shaped spacer 8.
Thus, a circuit board laminated structure can be obtained in which the end surface of the circuit board is in surface contact with the ground plane and GND grounding is ensured. As described above, by providing the support on the support member, and sequentially arranging and fixing the circuit board and the pipe-shaped spacer to the support, a circuit board laminated structure can be obtained with an inexpensive structure. By disposing the spacers on the same axis, the size of the circuit board can be reduced. As shown in FIG. 16, instead of the pipe-shaped spacer 80, a pipe-shaped spacer 85 having projections 86 at both ends may be used. At this time, the protrusion 8
6 between the protruding height h and the thickness t of the circuit board 60.
Set h. The outer diameter of the projection 86 is set slightly larger than the diameter of the through hole 61 of the circuit board 60. Thus, the same operation and effect as described above can be obtained. Further, as shown in FIG.
s' and the distance Hn 'between both end faces of the substrate, Hn'> H
By setting the relationship of s', desired functions can be easily obtained in addition to the above-described functions and effects by easily arranging two circuit boards 60 or arranging three circuit boards 60 (not shown). be able to. It should be noted that the present invention is not limited to only the above-described embodiments, and various modifications can be made without departing from the spirit of the invention. [Appendix] According to the above-described embodiment of the present invention, the following configuration can be obtained. (1) The endoscope is connected to the endoscope,
At least a processor unit provided with a parent circuit board having a signal processing circuit and the like is provided in the apparatus main body, and by electrically connecting a child circuit board having input / output terminals to the parent circuit board, In an endoscope apparatus including an external device capable of changing the function of the processor unit, a bottom panel and a rear panel forming a device main body of the external apparatus include:
A notch forming an opening for arranging the sub-circuit board is formed, and a cover member that closes the notch and is integrally fixed to the apparatus main body is provided. An endoscope device in which a member is fixed at a predetermined position with a predetermined fastening member, which is different from a fastening member for fixing another member constituting the processor device. (2) The endoscope apparatus according to appendix 1, wherein a plate member also serving as a partition is disposed around a space where the daughter board is disposed. (3) In an endoscope device having an endoscope and a processor device in which a plurality of circuit boards are stacked and arranged,
Vertically at a predetermined position in the processor device, provided with a plurality of pillars having a concave portion formed with a female screw at an end, a circuit board formed with a through hole inserted in the pillars at a predetermined position,
An endoscope device in which spacers each having a through-hole formed to be inserted into a support are sequentially placed and integrally fixed with a fastening member. (4) The endoscope device according to appendix 3, wherein convex portions are provided at both ends of the spacer. (5) The height of the projections and the thickness of the substrate have a relationship of t ≧ 2h (t: thickness of the substrate, h: height of the projections). The endoscope device according to claim 1. As described above, according to the endoscope apparatus of the present invention, the parent circuit board of the slave circuit board having a desired function and having input / output terminals for connection to external devices. It is possible to provide an endoscope apparatus that can be easily and reliably added to or replaced with the endoscope.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 12 relate to an embodiment of the present invention, and FIG. 1 is a diagram illustrating a configuration of an endoscope system. FIG. 2 is a top view illustrating a video processor. FIG. 3 is a cross-sectional view illustrating a video processor. FIG. 4 is a view illustrating a sub-circuit board. FIG. 5 is a perspective view illustrating an opening for disposing a sub-circuit board formed in the video processor. FIG. 7 is a cross-sectional view illustrating an opening for disposing a sub-circuit board formed in a processor. FIG. 7 is a diagram illustrating the mounting of the sub-circuit board. FIG. 8 is a diagram illustrating the mounting state of the sub-circuit board. FIG. 10 is a view for explaining another example of the fastening member. FIG. 10 is a view for explaining another configuration of the bottom surface closing member. FIG. 11 is a view for explaining another configuration of the rear panel component of the slave circuit board. FIG. 11 is a diagram for explaining an attached state of a rear panel component of FIG. 13 is a view for explaining a configuration example in which a plurality of circuit boards are stacked and arranged. FIGS. 14 to 17 are views for explaining a circuit board stacked structure, and FIG. 14 is a view for explaining the configuration of a circuit board. 15 illustrates a circuit board lamination state. FIG. 16 illustrates another configuration example of a spacer. FIG. 17 illustrates a configuration example in which two circuit boards are laminated and arranged. Video processor 10 Device main body 10b Rear panel 10c Bottom panel 17 Rear cutout 18 Bottom cutout 23 Substrate placement space 23a Opening 41 First hexagon socket head bolt 42 Second Hexagon socket head bolt 43 ... 3rd hexagon socket head bolt

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H05K 7/14 H05K 7/14 G F-term (Reference) 2H040 GA02 GA11 4C061 CC06 JJ06 4E360 AB09 AB13 BA08 BD03 EA18 ED02 ED17 ED27 FA08 GA04 GA46 GA53 GB99 5C022 AA09 AB00 AC70 AC77 AC78 5E348 AA07 AA16 AA32 CC06 CC08 CC09 EH01 FF03

Claims (1)

Claims: 1. An endoscope, comprising: a processor unit to which the endoscope is connected and which is provided with a parent circuit board having a signal processing circuit and the like in at least an apparatus body; An endoscope apparatus comprising: an external device capable of changing the function of the processor unit by electrically connecting a child circuit board having input / output terminals to the parent circuit board; A notch that forms an opening for arranging the sub-circuit board is formed in the bottom panel and the back panel that form the main body, and these notches are closed to be integrally fixed to the apparatus main body. An endoscope apparatus, wherein a member is provided, and the sub-circuit board and the lid member are fixed at a predetermined position with a predetermined fastening member different from a fastening member for fixing other members constituting the processor device. .