JP5231197B2 - Endoscope device - Google Patents

Description

  The present invention relates to an endoscope apparatus in which a handle is rotatably attached to an apparatus main body to which an endoscope is connected.

  As is well known, endoscopes are widely used in the medical field and the industrial field. An endoscope used in the medical field is a treatment in which an elongated insertion portion is inserted into a body cavity, which is a site to be examined, to observe an organ in the body cavity or to be inserted into an insertion channel of a treatment instrument as necessary. Various kinds of treatments can be performed using tools.

  In addition, endoscopes used in the industrial field are used to observe and treat various damages such as scratches and corrosion on a test site by inserting a long and thin insertion portion into a jet engine that is a test site or piping in a factory. Etc. can be performed.

  An imaging unit including an objective lens unit, an imaging element such as a CCD, or a light emitting unit for illuminating a test site in the distal end of the insertion portion of the endoscope in the insertion direction (hereinafter simply referred to as the distal end). Etc. are well known.

  Further, the rear end of the insertion portion of the endoscope in the insertion direction (hereinafter simply referred to as the rear end) is connected to the operation portion. The operation unit is provided with various switches for instructing various imaging operations in the imaging unit, a bending operation lever for performing a bending operation of the bending unit provided on the distal end side of the insertion unit, and the like. In addition, the structure by which the monitor which displays the image of the test site imaged with the imaging unit in the operation part is provided is also known.

  Furthermore, a universal cable extends from the operation unit, and the extended end of the universal cable is connected to the apparatus main body. The apparatus main body is provided with a monitor for displaying an image of the test site imaged by the imaging unit, various control boards, a light source, and the like. Note that the endoscope apparatus is configured by the apparatus main body and the endoscope.

  In addition, in order to improve the transportability of the apparatus main body, it is well known that the apparatus main body is provided with a downward U-shaped handle to which both ends of the arm portion are connected on both sides of the apparatus main body. . Further, such a handle can be freely rotated by a shaft that fixes the end of the arm portion to the side surface of the apparatus main body as a rotation axis so as not to interfere with the operation of the operator on the apparatus main body. Generally it is. Furthermore, a configuration in which the handle is used as a leg when the apparatus main body is placed by rotating the handle is also well known.

  Thus, the structure which fixes the edge part of the arm part of a handle | steering wheel with respect to an apparatus so that rotation is possible is disclosed by patent document 1, for example.

In Patent Document 1, a side surface of the device is provided with a fitting hole into which a rotation shaft provided at an end portion of the arm portion of the handle is fitted, and a plurality of locking holes are provided around the hole in a circumferential shape. When the rotation shaft of the handle is inserted into the insertion hole, and the locking piece formed around the rotation shaft is inserted into one of the plurality of locking holes, the locking piece and the plurality of locking The structure which fixes the rotation angle of the variable handle | steering_wheel using the engagement with a hole is disclosed.
Japanese Utility Model Publication No. 63-13838

  However, in the configuration disclosed in Patent Document 1, since the handle can only fix the rotation angle of the handle at a position where a plurality of locking holes are formed, there is a problem that the rotation position cannot be finely adjusted. was there.

  Further, in the configuration disclosed in Patent Document 1, the rotation shaft provided on the arm portion of the handle is pressed by the operator using the spring and the plurality of disk-shaped members, and is locked from the locking hole. By removing the piece, the handle whose rotation angle is fixed can be rotated, that is, the angle of the handle can be varied. In addition to the increase in manufacturing cost, there is a problem that the structure for rotating the handle becomes complicated, and the structure around the rotation shaft becomes large.

  The present invention has been made in view of the above-described problems. The handle can be easily rotated steplessly with respect to the apparatus main body, and the rotation angle of the handle can be easily set at a desired rotation position. An object of the present invention is to provide an endoscope apparatus capable of realizing a structure that can be fixed easily and in a space-saving manner.

In order to achieve the above object, an endoscope apparatus according to an aspect of the present invention is an endoscope apparatus in which a handle is rotatably attached to an apparatus main body to which an endoscope is connected. A rotary shaft provided on the rotary shaft, a groove portion having a V-shaped cross section formed circumferentially along the outer peripheral surface of the rotary shaft, and a cross-sectional mountain shape formed circumferentially on the inner peripheral surface with respect to the groove portion The convex portion of the rotary shaft is fitted into the outer peripheral surface of the rotary shaft so that the rotary shaft is rotatably held and a notch is formed in a part thereof. The apparatus main body includes a bearing member formed in a shape and a rotation shaft insertion groove into which the rotation shaft is inserted in a state where the bearing member is fitted to the outer peripheral surface of the rotation shaft. The fixed member fixed, and the rotation shaft of the fixed member provided on the bearing member A rotation preventing member for preventing rotation of the bearing member caused by the rotation of the rotating shaft by fitting into a hole formed in the insertion grooves, at least a portion is located opposite to lack the cutting And by pressing the bearing member against the rotating shaft while deforming the bearing member, the frictional force accompanying the contact between the inclined surface of the groove and the inclined surface of the convex portion of the bearing member A pressing member that applies a load to the rotation of the rotating shaft, and the bearing member is deformed by being pressed by the pressing member facing the notch so that the convex The inclined surface of the portion comes into contact with the inclined surface of the groove portion with a frictional force .

  According to the present invention, a configuration in which the handle can be easily rotated steplessly with respect to the apparatus main body and the rotation angle of the handle can be easily fixed at a desired rotation position is simple and simple. An endoscope apparatus that can be realized in a space-saving manner can be provided.

  Embodiments of the present invention will be described below with reference to the drawings. Hereinafter, the endoscope apparatus will be described by taking a shoulder type industrial endoscope apparatus excellent in portability as an example.

  1 is a perspective view of an endoscope apparatus showing the present embodiment, FIG. 2 is an enlarged perspective view of the apparatus main body in the endoscope apparatus of FIG. 1, and FIG. It is a perspective view which shows the state which can rotate freely.

  As shown in FIG. 1, an endoscope apparatus 100 includes an endoscope 1, an apparatus main body 50 connected to the endoscope 1, and an endoscope adapter (hereinafter simply referred to as an adapter) 10. The main part is composed.

  The endoscope 1 includes an elongated and flexible insertion portion 2, an operation portion 3 connected to the rear end side in the insertion direction S of the insertion portion 2, and a flexible extension extended from the operation portion 3. The main part is comprised by the universal cord 4 which has property.

  In order from the distal end side in the insertion direction S of the insertion portion 2 to the insertion portion 2, the adapter 10 can be detachably attached to the distal end portion 2 s and the bending operation lever 3 w of the operation portion 3. The curved portion 2w and the long flexible tube portion 2k formed of a flexible member are connected to each other, and the rear end portion of the flexible tube portion 2k is connected to the operation portion 3. .

  In addition, an imaging unit including an imaging element such as a CCD (not shown) that images a region to be examined is provided inside the distal end portion 2 s, and is provided in the insertion unit 2, the operation unit 3, and the universal cord 4. An imaging line (not shown) for transmitting the image signal of the test site imaged by the imaging unit to the apparatus main body 50 is inserted.

  Further, an LED for illuminating the test site is provided inside the distal end portion 2s, and a power line for supplying power to the LED is inserted into the insertion portion 2, the operation portion 3, and the universal cord 4. Has been.

  When only the illumination lens is provided in the distal end portion 2s, a light guide for supplying illumination light to the illumination lens is provided in the insertion portion 2, the operation portion 3, and the universal cord 4. It is inserted.

  A bending operation lever 3w for bending the bending portion 2w is arranged upright on the operation portion 3 so as to be tiltable in at least four directions.

  The bending operation lever 3w has a bending operation wire (not shown) inserted into the insertion portion 2 in any one of the up / down / left / right directions of the bending portion 2w when the tilt direction is changed by the operator. Bend through.

  In addition to the bending operation lever 3w, for example, various switches (not shown) for instructing various imaging operations in the imaging unit described above are disposed in the operation unit 3.

  The end of the universal cord 4 that extends from the operation unit 3 on the side of the apparatus main body 50 is externally mounted on the side surface 51 s of the outer casing 51 of the apparatus main body 50 from a position in the height direction H lower than the monitor 52 described later. It enters the inside of the casing 51 and is fixed to the inside.

  As shown in FIGS. 1 to 3, the apparatus main body 50 has, for example, a box shape, and an exterior casing 51 configured by, for example, magnesium die casting or a resin mold includes a first member 51 a and a second member. It is configured by joining the member 51 b in the thickness direction A of the apparatus main body 50. That is, the exterior casing 51 is configured to be divided into two in the thickness direction A.

  Inside the outer casing 51 covered with the first member 51a and the second member 51b, an electrical component (not shown) such as a CPU for image processing, or an LED is provided in the tip 2s. In this case, a battery unit or the like (not shown) that supplies power to the LEDs via the above-described power supply line is disposed.

  In addition, a monitor 52 that displays an endoscopic image captured by the imaging unit of the endoscope 1 is provided on the front surface 51f of the outer casing 51 in the thickness direction A. The monitor 52 may be provided in the operation unit 3 of the endoscope 1.

  Further, the both sides 51s adjacent to the front surface 51f in the width direction Y orthogonal to the thickness direction A and the height direction H of the outer casing 51 improve the portability of the device main body 50 and when the device main body 50 is mounted. As shown in FIG. 3, one end 53at of each arm portion 53a of the handle 53 that also serves as a leg portion of the handle 53 is rotatably connected. The other end of each arm portion 53 a is connected by a grip portion 53 t of the handle 53.

  Specifically, as shown by the solid line in FIG. 3, the handle 53 has a position where the gripping portion 53 t contacts the front surface 51 f of the exterior housing 51 and the back surface 51 t on the opposite side in the thickness direction A, and 1 in FIG. 3. As shown by the chain line, the grip part 53t is closest to the back surface 51t in the thickness direction A, and the grip part 53t is closest to the upper surface 51j of the exterior housing 51 as shown by the two-dot chain line in FIG. One end 53at of each arm portion 53a is pivotally connected to both side surfaces 51s so that it can rotate steplessly between the positions and stop at a desired rotation position.

  Next, a method for connecting one end 53at of each arm portion of the handle 53 to each side surface 51s of the exterior casing 51 of the apparatus main body 50 will be described with reference to FIGS.

  4 is a perspective view showing the second member together with the handle from which the first member has been removed from the outer casing of the apparatus main body of FIG. 2, and FIG. 5 is a perspective view of the handle inside the second member of FIG. FIG. 6 is a partially enlarged perspective view showing a part for fixing the rotating shaft in an enlarged manner, and FIG. 6 is a plan view of the fixing member, the bearing member, and the pressing member in FIG. 5 as viewed from the direction VI in FIG.

  7 is a perspective view showing a state in which the convex portion of the bearing member is fitted in the V groove of the rotation shaft of FIG. 5 with the pressing member removed from FIG. 5, and FIG. FIG. 9 is an enlarged perspective view showing the bearing member of FIG. 7, and FIG. 9 is a sectional view of the rotating shaft and the bearing member of FIG.

  Further, FIG. 10 is a diagram showing a modified example in which a portion of the pressing member that contacts the bearing member is formed in a semicircular shape, FIG. 11 is a diagram showing the flat pressing member of FIG. 5 before bending, and FIG. FIG. 13 is a partial cross-sectional view of the rotation shaft and the bearing member at a portion where the convex portion of the bearing member is fitted in the V groove of the rotation shaft. FIG. FIG. 14 is a partial sectional view of the rotation shaft and the bearing member of the insertion portion in the configuration of the modified example in which the rectangular convex portion is inserted, and FIG. 14 shows a state in which the pressing member of FIG. 5 presses the bearing member in the thickness direction. It is sectional drawing shown roughly.

  In FIG. 4, parts provided inside the exterior casing 51 are not shown except for a fixing member in order to simplify the drawing.

  As shown in FIG. 4, at one end 53 at of the arm portion 53 a of the handle 53, a rotation shaft 17 made of metal such as aluminum and extending in the width direction Y is provided. .

  In addition, operation end hanger receiving portions 15 having, for example, a flange shape are fixed to the end surface of the rotation shaft 17 located outside the apparatus main body 50 by screws 16. The operation unit hanger receiving unit 15 has a function of holding the operation unit 3 when the operation unit 3 is locked during work using the endoscope apparatus 100.

  Further, as shown in FIGS. 7, 9, and 12, a groove portion having a V-shaped cross section circumferentially along the outer peripheral surface 17 g is provided on the outer peripheral surface 17 g of the portion of the rotating shaft 17 that extends into the apparatus main body. In the V-shaped groove portion 17v, as shown in FIG. 8, in the bearing member 40 formed in a C shape by forming a notch 40c, for example, in part from resin. A convex section 40v having a mountain-shaped cross section formed in a circumferential shape on the inner peripheral surface 40n is rotatably and closely fitted.

  As shown in FIG. 7, the bearing member 40 is fitted to the outer peripheral surface 17 g of the rotating shaft 17 to hold the rotating shaft 17 in a freely rotatable manner. Further, as shown in FIG. 8, a projecting pin 18 as a rotation preventing member is formed on the bottom surface of the bearing member 40, that is, at a position facing the notch 40c.

  In addition, as shown in FIG. 12, the groove part 17v formed in the outer peripheral surface 17g of the rotating shaft 17 is formed in a V-shaped cross section, and the convex part 40v which fits in this groove part 17v freely and closely is cross-sectional. What is formed in a mountain shape is that the bearing member 40 is pressed against the rotating shaft 17 from above in the thickness direction A by the pressing of a leaf spring 30 described later, and friction generated between the two members. Thus, when a load is applied to the rotation of the rotating shaft 17, as shown in FIG. 12, the frictional force F1 generated when the inclined surface 17vk of the groove portion 17v and the inclined surface 40vk of the convex portion 40v are brought into contact with each other. As shown in FIG. 13, the groove portion 17v ′ formed on the outer peripheral surface 17g ′ of the rotating shaft 17 ′ is formed in a rectangular shape as shown in FIG. 13, and the groove portion 17v ′ is rotatable and tightly fitted. Convex 40v formed on the inner peripheral surface 40n 'of the bearing member 40' Is formed in a rectangular cross section, and the bottom surface of the groove portion 17v ′ when the bearing member 40 ′ is pressed against the rotating shaft 17 ′ from above in the thickness direction A by pressing the leaf spring 30 described later. This is because the force applied to the surface by the vector component force becomes larger than the frictional force F2 generated between 17vk ′ and the protruding surface 40vk ′ of the convex portion 40v ′. This is because the contact area between the groove and the convex portion is also affected by the fact that the configuration of FIG. 12 is larger than the configuration of FIG. That is, a large frictional force can be obtained in a small space between the bearing member 40 and the rotating shaft 17.

  As shown in FIGS. 5 to 7, the rotating shaft 17 in which the bearing member 40 is fitted to the outer peripheral surface 17 g is a fixing member provided on the inner side of the side surface 51 s of the exterior housing 51 of the apparatus main body 50. It is inserted in 20 rotation shaft insertion grooves 20m.

  The rotation shaft insertion groove 20m holds the rotation shaft 17 in which the bearing member 40 is fitted to the outer peripheral surface 17g.

  At this time, as shown in FIGS. 5 and 6, the pin 18, which is a rotation preventing member formed in the bearing member 40, is inserted into the hole 20 p formed in the rotation shaft insertion groove 20 m of the fixing member 20. doing. This prevents the bearing member 40 from rotating with the rotation of the rotating shaft 17 so that the bearing member 40 always slides in the V-groove, and the hole 20p is notched regardless of the rotation of the rotating shaft 17. The posture of the bearing member 40 in the rotating shaft insertion groove 20m is maintained so that 40c is always directed in the direction facing the leaf spring 30 described later, that is, upward in the thickness direction A.

  Further, as shown in FIG. 7, two screw holes 20h are formed on the upper surface of the fixing member 20 in the thickness direction A at a position sandwiching the rotating shaft 17 in the height direction H. 11 are screwed through the one end 30a and the other end 30b, so that a plate-like member as shown in FIG. 11 is bent into a mountain shape as shown in FIG. 5 on the upper surface of the fixing member 20. As shown in FIG. 6, the leaf spring 30 that is a pressing member formed by is fixed so that the top portion 30 t faces the notch 40 c.

  As shown in FIG. 14, the leaf spring 30 presses the bearing member 40 against the rotating shaft 17 with a pressing force W while the inclined surface 30 k deforms the bearing member 40, thereby the groove portion of the rotating shaft 17. A frictional force F1 is generated between the inclined surface 17vk of 17v and the inclined surface 40vk of the convex portion 40v of the bearing member 40, and a load is applied to the rotation of the rotating shaft 17.

  The magnitude of the frictional force F1 generated between the inclined surface 17vk and the inclined surface 40vk is such that the handle 53 fixed to the rotating shaft 17 can be rotated by the operator's hand. When the apparatus main body 50 is mounted with the legs as the legs, the handle 53 is set to a size that does not rotate due to its own weight.

  As shown in FIG. 10, the inclined surface 30k of the leaf spring 30 is not formed in an arc shape in accordance with the shape of the outer peripheral surface 17g of the rotating shaft 17, when the leaf spring 30 is formed of a sheet metal. This is because the shape may vary, and the force that presses the bearing member 40 may vary.

  Further, as shown in FIGS. 5 and 6, when the leaf spring 30 is formed in a mountain shape, the plate member shown in FIG. 11 can be formed simply by bending the top portion 30t into a mountain shape, so that it is easy to manufacture. In addition to the advantages, as shown in FIG. 11, the accuracy of the interval D between the screw holes 30h through which the screws 31 formed by die-cutting before bending the plate-like member can be easily obtained, as shown in FIG. Even when the distance from the end of one end 30a and the end of the other end 30b of the leaf spring 30 to the bending position P of the top 30t is equal (L1 = L2) or varies (L1 ≠ L2). The sum W (W1 + W2 = W) of the pressing force W1 from the inclined surface 30k on one side and the pressing force W2 from the inclined surface 30k on the other side becomes a constant value if the interval D is constant. Bending position P of top 30t Regardless, it is possible to from the leaf spring 30 to the constant pressing force W with respect to the bearing member 40, because there is an advantage of the pressing force W can stably be secured in other words. That is, it is not necessary to adjust the pressing force W.

  As described above, in the present embodiment, when the end portions 53at of the arm portions 53a of the handle 53 are fixed to the side surface 51s of the outer casing 51 of the apparatus main body 50 so as to be rotatable, the handle 53 is rotated. A groove portion 17v having a V-shaped cross section is provided on the outer peripheral surface 17g of the shaft 17, and the groove portion 17v is closely and rotatably fitted to the convex portion 40v having a cross-sectional mountain shape, whereby the outer peripheral surface of the rotary shaft 17 is provided. The rotating shaft 17 in which the bearing member 40 is fitted to 17g and the bearing member 40 is fitted to the outer peripheral surface 17g is fitted in the rotating shaft fitting groove 20m of the fixed member 20 and the pin of the bearing member 40 In a state where 18 is inserted into the hole 20p of the fixing member and the rotation of the bearing member 40 is restricted, the bearing member 40 is pressed toward the rotation shaft 17 by the leaf spring 30, thereby projecting from the inclined surface 17vk of the groove portion 17v. By the frictional force F1 generated between the inclined surface 40vk of 40v, shown to confer load to the rotation of the rotating shaft 17 which is rotatably held in the bearing member 40.

  According to this, a large frictional force F1 is stably generated between the rotating shaft 17 and the bearing member 40 by a simple configuration including only the rotating shaft 17, the fixing member 20, the bearing member 40, and the leaf spring 30. Therefore, the operator can easily rotate the handle 53 steplessly within the rotation range shown in FIG. 3 and can also rotate the handle 53 to a desired angle. The rotation angle of the handle 53 can be easily fixed by the frictional force F1 only by stopping the rotation operation.

  This is particularly effective when the handle 53 is used as a leg when the apparatus main body 50 is placed.

  In addition, since the rotation mechanism of the handle 53 can be configured by only the rotation shaft 17, the fixing member 20, the bearing member 40, and the leaf spring 30, the space between the rotation shaft 17 and the rotation shaft 17 can be reduced in the apparatus main body 50. A turning mechanism of the handle 53 that can generate a large frictional force F1 between the bearing member 40 and the bearing member 40 can be realized.

  As described above, the configuration in which the handle 53 can be easily rotated steplessly with respect to the apparatus main body 50 and the rotation angle of the handle 53 can be easily fixed at a desired rotation position is simple and simple. An endoscope apparatus 100 that can be realized in a space-saving manner can be provided.

Hereinafter, modifications will be described.
In the present embodiment, a shoulder-type industrial endoscope apparatus excellent in portability has been described as an example for the endoscope apparatus, but is not limited to an industrial endoscope apparatus, Even when applied to a medical endoscope apparatus, the same effect as in the present embodiment can be obtained.

The perspective view of the endoscope apparatus which shows this Embodiment. The perspective view which expands and shows the apparatus main body in the endoscope apparatus of FIG. The perspective view which shows the state which the handle | steering-wheel in FIG. 1 can rotate freely. The perspective view which shows the 2nd member which removed the 1st member from the exterior housing | casing of the apparatus main body of FIG. 2 with a handle | steering-wheel. The partial expansion perspective view which expands and shows the site | part which fixes the rotating shaft of a handle | steering_wheel inside the 2nd member of FIG. The top view which looked at the fixing member of FIG. 5, the bearing member, and the press member from the direction of VI in FIG. FIG. 6 is a perspective view showing a state in which a mountain-shaped convex portion of the bearing member is fitted in the V groove of the rotation shaft of FIG. 5 with the pressing member removed from FIG. 5. The perspective view which expands and shows the bearing member of FIG. Sectional drawing of the rotating shaft and bearing member of FIG. The figure which shows the modification which formed the site | part which contact | abuts the bearing member of a press member in semicircle shape. The figure which shows the flat pressing member of FIG. 5 before bending. FIG. 6 is a partial cross-sectional view of the rotation shaft and the bearing member at a portion where a mountain-shaped convex portion of the bearing member is fitted in the V groove of the rotation shaft. The fragmentary sectional view of the rotation axis | shaft of the insertion site | part in the structure of the modification in which the rectangular-shaped convex part of a bearing member inserts in the rectangular groove | channel of a rotating shaft, and a bearing member. FIG. 6 is a cross-sectional view schematically showing a state where the pressing member of FIG. 5 presses the bearing member in the thickness direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Endoscope 17 ... Rotary axis 17g ... Outer peripheral surface 17v ... Groove part 17vk ... Inclined surface 18 ... Pin (rotation prevention member)
20 ... Fixing member 20m ... Rotating shaft insertion groove 20p ... Hole 30 ... Plate spring (pressing member)
30a ... One end 30b ... The other end 30k ... Inclined surface 30t ... Top 40 ... Bearing member 40c ... Notch 40n ... Inner circumferential surface 40v ... Convex portion 40vk ... Inclined surface 50 ... Device main body 53 ... Handle 100 ... Endoscope device

Claims (4)

An endoscope apparatus in which a handle is rotatably attached to an apparatus main body to which an endoscope is connected,
A rotating shaft provided on the handle;
A groove portion having a V-shaped cross section formed circumferentially along the outer peripheral surface of the rotation shaft;
The convex part of the cross-sectional mountain shape formed in the inner peripheral surface with respect to the groove part is closely fitted to the outer peripheral surface of the rotary shaft so that the rotary shaft can be freely rotated. And a bearing member formed in a C shape by forming a notch in a part thereof , and
A fixing member fixed to the apparatus main body, including a rotation shaft insertion groove into which the rotation shaft is inserted, in a state where the bearing member is fitted to the outer peripheral surface of the rotation shaft;
A rotation preventing member provided in the bearing member for preventing rotation of the bearing member due to rotation of the rotation shaft by being fitted into a hole formed in the rotation shaft insertion groove of the fixed member. When,
At least a part of the bearing member is positioned opposite to the notch, and the bearing member is pressed against the rotating shaft while deforming the bearing member, whereby the inclined surface of the groove and the bearing member are A pressing member that applies a load to the rotation of the rotation shaft by a frictional force accompanying the contact with the inclined surface of the convex portion;
Equipped with,
The bearing member is deformed by being pressed by the pressing member facing in the vicinity of the notch, so that the inclined surface of the convex portion contacts the inclined surface of the groove portion with frictional force. Endoscopic device. Before Kikaido prevention member, said bearing member to said outer peripheral surface of the rotating shaft is fitted, in a state in which the rotating shaft is fitted into the pivot shaft fitting groove, the notch is the pressing member The endoscope apparatus according to claim 1, wherein the posture of the bearing member is held so as to be directed in a direction opposite to the head. The pressing member is composed of a plate-like member whose one end and the other end are fixed to the fixing member and whose top is bent into a mountain shape so as to face the notch, and the inclined surface of the plate-like member is The endoscope apparatus according to claim 1, wherein the bearing member is pressed against the rotation shaft along a normal direction of the plate-like member . The endoscope apparatus according to claim 3, wherein a portion of the plate-like member that contacts the bearing member is curved along an outer peripheral shape of the bearing member.

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