JP2001290200A - Structure for operating button and camera including it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the structure of an operating button by which the reduction of a space is attained and excellent operability is obtained and a camera including it. SOLUTION: Operation members (a cap 1 and a button 2) pressed and operated by a specified stroke and a shaft part 2a extended from the operation member are slidably attached in an axial direction by having a spring 3 interposed at a base part 10a at which the operation members and a member having the shaft part 2a are integrated and which has a fitting part 5 to which the shaft part 2a projected is fitted. The fitting part 5 has plural extended parts 5c1-5c3 corresponding to the shaft part 2a around the shaft 2a, and holes or recessed parts, i.e., relieving parts (2c1-2c3) which do not abut on the extended parts in a state that the operation members are pressed are formed at position corresponding to the extended parts 5c1-5c3, so that the structure of the operating button such as for instance a release button and the camera including it are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure of an operation button and a camera including the same, and more particularly, to a structure for receiving an operation button such as a release button.

[0002]

2. Description of the Related Art Conventionally, various proposals have been made for a push button type switch operating member.
As disclosed in Japanese Patent Laid-Open No. 185110, there is a camera used in a camera raise mechanism. In this technique, a shaft portion serving as a switch pressing portion provided on a release operation switching member (hereinafter, abbreviated as a "release operation member") can slide with a shaft hole portion provided on a release base serving as a base thereof. The supporting structure is shown in FIG. In the case of such a structure, it is necessary to secure a certain fitting length (slidable stroke) between the shaft portion and the shaft hole portion in order to improve the operation feeling of the release operation member. Also, if you do not secure a certain operation stroke to press, the switch will be ON even if your finger touches even a little
/ OFF, which makes it difficult to operate.

In general, the longer the fitting length is, the more advantageous it is against the backlash of the fitted shaft portion, while the length depends on the size of the device (ie, the camera including the operation buttons) itself. (Height) tends to increase, which is not preferable for miniaturization of the apparatus.

[0004]

However, conventionally, when miniaturizing a device including such a switch operating member, as described above, the fitting length between the shaft portion and the shaft hole portion and the operation stroke are preferably improved. It was difficult to make them compatible. For example, when the fitting length is shortened, it is relatively easy to sufficiently secure the operation stroke, but when the operation member is pushed down, the shaft portion tilts due to backlash with the shaft hole portion, The shaft is pressed against the end of the shaft hole, and the operating feeling of the operation member is significantly impaired. That is, so-called stiffening occurs (hereinafter, this phenomenon is referred to as stiffening). In the case where the stiffness occurs in this way, not only the operation feeling is impaired as described above, but also the wear of the shaft portion and the shaft hole portion progresses, and the operation feeling may be further deteriorated and the durability of the device may be impaired. There is. Conversely, when the fitting length is increased, the above-mentioned stiffness is less likely to occur, but it is difficult to secure a sufficient operation stroke, and erroneous operations and the like are likely to occur. Such a problem is possible by increasing the space in the operation direction of the operation member, but causes an increase in the size of the device.

The present invention has been made in view of the above problems, and has as its object to reduce the size of the apparatus while ensuring a sufficient fitting length, a sufficient operation stroke, and a balance between the two. And a camera including the same.

[0006]

In order to solve the above-mentioned problems and achieve the object, the present invention takes the following measures. For example, the fitting length is set so that the shaft portion on the receiving side, which extends from the switch operating member, receives the shaft hole in the axial direction over as long a range as possible, and the size of the operating member does not adversely affect the miniaturization of the device. Within the limitations, a structure of a release operation member for a camera that provides a stable operation stroke with straightness is proposed here.

More specifically, the operating member includes a control member that is pressed by a predetermined stroke, a shaft extending from the control member, and a base having a fitting portion that fits the shaft. The joint portion has a plurality of extending portions corresponding to the shaft portion around the shaft portion, and the extending portion is pressed at a predetermined position of the operating member corresponding to the extending portion while the operating member is pressed. The present invention proposes a structure of an operation button having an escape portion formed so as not to come into contact with the projection portion, and a camera including the same. The extended portions are characterized in that they are provided at approximately three places at substantially equal intervals around the shaft portion. Further, the escape portion is formed by a hole penetrating to the operation surface side of the operation member, and has a feature that a cover member covering the hole is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The gist of the present invention will be specifically described below with reference to a plurality of embodiments. (First Embodiment) FIG. 1 illustrates a structure of an operation button and an assembly structure of a camera including the operation button, taking a release operation member as an example as a first embodiment. On a top surface of a front cover 10, which forms a front half of the housing of the camera, a base 10a as a release table to which a release operation member is attached is formed. This operating member pressed by a user's finger (not shown) from above with a predetermined stroke is assembled from a cap 1 having an edge 1a and a release button 2 covered by the cap. A shaft portion 2a integrally projects from the center of the lower surface of the release button 2 constituting the operation member by a predetermined length in the vertical direction. In the vicinity of this, two locking arms 2b extend around the shaft portion 2a, and locking claws 2b1 and 2b2 for engaging with the base portion 10a side are outwardly directed to each other. The tip is formed in a slightly upward direction.

The two locking arms 2b are provided so that their widths are different from each other, so that when the release button 2 is mounted on the base 10a, it is possible to prevent the release button 2 from being erroneously mounted in the rotational direction. You can do it.

The shaft portion 2a protruding to a predetermined length is slidably supported by a fitting hole 5a opened in a fitting portion 5 provided substantially at the center of the base portion 10a. The spring 3 is arranged on the outer periphery of the fitting portion 5. The operating members (cap 1 and button 2) can slide in the axial direction while being urged in the axial direction with the spring 3 interposed. Further, by pressing a predetermined portion of a switching portion (release switch unit 30) (not shown) provided below the base portion 10a in two stages with the tip end (shaft end 2f), the first stage is pressed.
It is configured to sequentially switch to the release and the second release.

In this embodiment, like a well-known camera, a first release and a first release, which are switches for performing a distance measurement and a photometry operation for measuring the distance to the subject and the brightness of the subject prior to the photographing operation. This is a two-stage switch with a 2nd release, which is a switch for inputting by further pressing from the position and for focusing and opening / closing the shutter.

The main feature of the structure of the operation buttons such as the release button 2 in this embodiment is that the shape of the cylindrical fitting portion 5 protruding upward from the center of the base 10a is different from that of the shaft 2a to be inserted.
Around the three extending portions 5c1 to 5c1 corresponding to the shaft portion 2a.
5c3 is further extended upward, and at three positions of the release button 2 corresponding to these extending portions 5c1 to 5c3, these extending portions 5c1 are provided in a state where the operating member is pressed. The hole-shaped relief portions 2c1 to 2c3 that do not come into contact with the release buttons 2c5 to 5c3 are formed up to the operation surface side of the release button 2, and have a feature that the fitting length can be set long.

Specifically, a release button 2 as an operation member
Are formed at the positions respectively corresponding to the extending portions 5c1 to 5c3, three relief portions 2c1 to 2c3 formed of fan-shaped holes at substantially equal intervals around the shaft portion 2a as shown in the drawing. When the button 2 is pressed, the extending portions 5c1 to 5c3 enter the escape portions 2c1 to 2c3. The release button 2 is provided on the operation surface side of the release button 2.
An adhesive groove 2e is formed so as to surround c1 to 2c3. The adhesive groove 2e indicates the application range of the adhesive when the cap 1 is bonded to the release button 2, and also functions as an adhesive pool. Further, cutout holes 2d1 and 2d2 are formed on the outside adjacent to the bases of the pair of locking arms 2b. In this embodiment, it is assumed that the release button 2 is formed by injection molding. However, when forming the locking claws 2b1 and 2b2 as shown in FIG.
Inserting a mold from 1 and 2d2
By molding b2, a slide mold for molding the locking claws 2b1 and 2b2 becomes unnecessary, so that the mold structure is simplified and the cost of parts can be reduced.

Since the escape portions 2c1 to 2c3 and the cutout holes 2d1 and 2d2 are holes penetrating to the operation surface side of the operation member, the cap 1 is also a member for covering these holes.

On the other hand, the periphery of the fitting portion 5 as a bearing provided on the base 10a of the front cover 10 of the camera is formed as follows. For example, three extension portions 5c1
Fitting wall 5 having a cylindrical shape and having a height of 5c3
A fitting wall peripheral base 9 is formed in the shape of a groove around the base of the fitting portion 5 having b, supports the spring 3, and is provided on both sides of the groove along the lateral direction of the camera. Rectangular holes 7 one by one
a and 7b are open. The slopes 8a and 8b are formed at a predetermined angle from the outer side of the rectangle toward the lower side of the axis. Further, a base concave ring portion 4 is formed in a concave groove shape so as to surround the whole thereof, and further, a base outer peripheral wall 6 is erected in an annular shape outside thereof.

By forming, assembling and disposing each part as described above, when the cap 1 of the operation member is pressed, the release button 2 is lowered against the urging force of the spring 3, and the shaft part 2a
Is smoothly moved downward while being guided by the fitting hole 5a.

Next, the detailed structure and operation of the operation button of the first embodiment will be described with reference to the sectional views of FIGS. FIG. 2 shows a cross-sectional structure of the operation button along line AA in FIG. As shown in the figure (see the left side of the figure), a cap 1 is mounted inside a base outer peripheral wall 6 formed on a base 10a, and a shaft 2a is inserted into a fitting hole 5a.
The release button 2 is inserted into the release button 2a, is urged upward by a spring 3 in the figure, and is restricted from moving upward by the locking claws 2b1 and 2b2. This state indicates a state where the release button 2 is not operated, and indicates a state where the release button 2 is at the initial position. This position is a state where the shaft end 2f does not push the switch recess 31 of the release switch unit 30. At this time, the edge 1a, which forms the outer peripheral end of the cap 1, approaches the inner peripheral surface of the base outer peripheral wall 6, but its diameter is set to a size that does not abut each other.

When the release button 2 is pressed against the urging force of the spring 3, as shown in FIG.
The shaft portion 2a slides down the fitting hole 5a, and the shaft end 2f
Pushes the switch recess 31 and the release switch unit 30 is turned on. This ON state is set to a relatively long operation stroke that starts from the first release and switches to the second release when pressed deeply. FIG.
Shows the cross-sectional structure of the operation button along the line BB in FIG. 1 as well, as described above, when pressed from the initial position (see the left side of the drawing) and further pressed deeply (Refer to the right side of the drawing), the escape portion 2c formed on the release button 2
1, 2c2 (, 2c3) and extension portions 5c1, 5c2 (, 5c
It can be seen that a sufficiently long fitting length can be obtained by each of 3) penetrating into the vicinity of the back surface of the cap 1.

As shown in FIG. 3 (right side in FIG. 3), when the release button 2 is pressed, the extending portions 5c1 (.about.2) are inserted into the escape portions 2c1 (.about.2c3) provided on the release button 2.
5c3) are formed so as to enter into the vicinity of the back surface of the cap 1, respectively, so that the fitting length between the shaft portion 2a and the fitting hole 5a can be set long. On the other hand, FIG.
As shown in the right side of the drawing, when the release button 2 is pressed, the extension portion is not provided for the portion where the relief portion is not provided, so that the release button 2 and the fitting portion are not provided. 5 does not abut. As described above, a relief portion is formed intermittently on the release button 2, and the extension portion corresponding to the relief portion is also intermittently arranged on the fitting portion,
It is possible to set the fitting length between the shaft portion 2a and the fitting hole 5a to a sufficient length without securing the strength of the entire release button 2 and increasing the size of the entire device. It is possible to ensure a sufficient operation stroke.

FIG. 3 also shows the engagement relationship with the base 10a by the locking claws 2b1 and 2b2 provided at the tip of the locking arm 2b. When assembling, the locking claws 2b1,
While the tip of each of the hooks 2b2 abuts the slopes 8a and 8b, the locking arm 2b is bent inward and elastically deforms as it is further inserted downward, and the tips of the locking claws 2b1 and 2b2 are respectively sloped 8a and 8b Sliding along the slope end 8
When they enter the holes 7a and 7b at a1 and 8b1, respectively, a restoring force is exerted by their elastic deformation, and the engaging upper arm 2
The elastic deformation of b returns. On the other hand, in this state, the release button 2 is urged upward in the figure by the spring 3 as described above, so that the release button 2 is locked by the engagement slopes 8a2, 8b2 provided on the back surfaces of the slopes 8a, 8b. Claws 2b1, 2b
2 comes into contact, and the position of the release button 2 is determined. At this time, the engaging slopes 8a2, 8b2 and the locking claws 2b1,
The force of the spring 3, that is, the force of the force in the direction in which the release button 2 is removed from the base 10 a (the direction of the force of the spring 3) is applied to the upper arm 2 b on the contact surface with the 2 b 2. The engaging slope 8a is deformed in the left and right directions.
2, 8b2 and the slopes of the locking claws 2b1, 2b2 are set respectively. Hereinafter, the state in which the component force acts as described above is referred to as "biting" or "component force is generated in the biting direction".

As described above, even if a force is applied in a direction to release the release button 2 from the base portion 10a, the engagement slope 8
a2, 8b2 and the engaging claws 2b1, 2b2 generate a component force in the biting direction at the contact surfaces thereof, so that the direction in which the engaging arm 2b is deformed when assembled to the base 10a is opposite. The release button 2 is not easily released even when vibration or impact is applied to the engaging arm 2b.

According to the engagement relationship between the locking claws 2b1 and 2b2 and the engagement slopes 8a2 and 8b2, the release button 2
Is more than the initial position (see the left side of FIGS. 2 and 3),
It functions as a "stopper" (stopper) that restricts upward movement. On the other hand, it is possible to move in a downward direction with almost no resistance within the range of only the set predetermined operation stroke (see the right side of the figure).

The perspective view shown in FIG. 4 is a view showing the back side of the base 10a provided on the front cover 10 of the camera, and the engaging portion of the release button 2 with the engaging claws 2b1 and 2b2. Is shown. That is, the fitting hole 5a is provided substantially near the center of the base 10a, and the locking holes 7a, into which the locking arms 2b of the release button 2 enter, are provided on both sides.
7b, and the locking claws 2b1, 2b2
Are provided with engaging slopes 8a2 and 8b2.
Extending grooves 13a and 13b, each of which has a V-shaped cross section continuous from the engaging slopes 8a2 and 8b2, are formed up to the shaft of the front cover 10. Front cover 10
When the front cover 10 is formed by injection molding or the like by using such a shape, the mold structure can be simplified. That is, for example, the inner surface of the front cover 10 including the back surface of the base 10a is formed by a movable mold,
The outer surface of the front cover 10 is formed by a fixed type, and the fitting holes 5a and the locking holes 7a and 7b provided in the base 10a are formed by a slide type sliding downward in FIG. Accordingly, the shape of the base 10a can be formed without using a so-called inner slide type that slides toward the inside of the front cover 10. Further, it is needless to say that the inner surface of the front cover 10 may be formed by a fixed type.

If it is desired to disassemble, the locking claws 2b1 and 2b2 are simultaneously moved from the inside of the front cover 10 to the slanted ends 8a1 and 8 while moving both the locking arms 2b obliquely downward in the axial center.
By disengaging from b1, the engagement can be easily released.

(Effect 1) Due to the structure of the operation button in the first embodiment, each member has the following operation. For example, the fitting portion 5 as a bearing member provided on the base portion 10a
Corresponding to the extending portions 5c1, 5c2, 5c3 of the shaft 2a
Are provided around the shaft, and the length of the fitting portion 5 for guiding the shaft portion 2a is extended.
Since the structure is extended by the lengths of c1, 5c2, and 5c3, the fitting length is increased accordingly.

Normally, when the shaft member is fitted inside the cylindrical member and moves, the shaft member comes into contact at a plurality of points, but is dynamically supported at at least two points (for example, a fulcrum or an action point). In the case of, the distance between the point where the shaft portion 2a abuts inside the fitting hole 5a (shaft hole portion) becomes relatively longer than the conventional one, and the designed shaft center and the shaft center of the shaft portion 2a become longer. (I.e., the inclination of the shaft portion 2a) is small. Therefore, the amplitude of rattling is reduced. That is, so-called stiffness is less likely to occur.

That is, as in this example, the release button 2
The fitting length is set such that the receiving shaft portion (fitting hole 5a) extends in the axial direction over as long a range as possible and adversely affects the miniaturization of the camera. Not provide a smooth operation stroke with straightness within the size of this release operation member. Therefore, by providing a hole as an escape portion inside the button 2 without increasing the size of the part, the fitting length becomes longer than before, so that the distance between the support points becomes longer, and the shaft 2a Rattle is easily suppressed. As a result, for example, while realizing the miniaturization of operation buttons for camera release,
To provide a structure of an operation button with good operability and a low possibility of erroneous operation and the like, and a camera including the same, since an operation stroke can be sufficiently secured and a fitting length of a fitting portion can be sufficiently secured. Is possible.

(Second Embodiment) Next, as another example of the present invention, a structure of an operation button according to a second embodiment and a camera including the same will be described focusing on characteristic portions thereof. The perspective view shown in FIG. 5 shows the structure of the operation button of the second embodiment and the assembly structure of a camera including the same. In the structure illustrated in the first embodiment described above, the cap 1 is mounted on the upper part of the release button 2. However, in this example, there is no cap 1, and the user's finger directly touches the upper surface of the release button 2 with the operation surface. It is designed to be pressed as

Therefore, one component (operating member) also serves as the configuration of the operating member including the cap 1 and the release button 2 described above, and the “button with cap” is replaced with the “button without cap”. This eliminates the need for one member.

The following changes are made to the shape of the release button 2 in accordance with the above-described configuration. 6 and 7
5 shows a cross-sectional structure along a line AA and a line BB in FIG. 5, respectively. From the lower bottom surface of the release button 2, similarly to the first embodiment, a shaft portion 2a extending along the axis and a pair of locking arms 2b are respectively protruded.
The receiving structure formed in a is formed in the same manner as in the first embodiment. However, the structure which is one of the features of the first embodiment described above, that is, the recesses 2c1 to 2c3 formed in the button 2 are not holes that penetrate, but are formed in an inverted concave shape here. That is, these three inverted concave portions become escape portions 2c1 to 2c3 having a ceiling, and the ceiling becomes an operation surface of the release button 2, and a flat surface as shown in FIG. It has a raised shape.

The left side of FIGS. 6 and 7 shows a state in which the release button 2 as an operation member is at an initial position, and the right side of FIG. 6 shows a state in which the release button 2 is pressed. As shown in FIG. 7, even when the release button 2 is pressed, the escape portions 2c1 (.about.2c3) extend to the extension portions 5c1 (.about.5c).
3) is set to enter. At this time, the ceilings (recessed bottom surfaces) of the escape portions 2c1 to 2c3 and the distal ends of the extension portions 5c1 to 5c3 are configured not to abut. On the other hand, as shown in FIG. 6, in a state where the release button 2 is pressed and operated, since the extension portion is not provided for the portion where the escape portion is not provided, the release button 2 and the fitting portion 5 There is no contact. As described above, the relief button 2 is intermittently formed with the relief portion, and the extension portion is also intermittently arranged at the fitting portion corresponding to the relief portion, thereby securing the strength of the entire release button 2 and the device. The fitting length between the shaft portion 2a and the fitting hole 5a can be set to a sufficient length without increasing the entire size, and the operation stroke of the release button 2 can be sufficiently secured. (Effect 2) As described above, according to the structure of the operation button in the second embodiment, a relief portion that makes the release button thinner intermittently is formed in a part of the release button 2 that is an operation member. ,
By similarly intermittently arranging the extension portion corresponding to the escape portion in the fitting portion, the strength of the entire operation member is secured, and the operation member and the operation member are not particularly enlarged in the operation direction of the operation member. It is possible to ensure a sufficient fitting length with the base. As a result, it is possible to provide a structure of an operation button with good operability and a low possibility of erroneous operation and the like and a camera including the same.

In addition to the first embodiment, the escape portion 2
Since c1 to 2c3 are not holes that penetrate to the operation surface side of the release button 2, it is not necessary to provide a cap that covers the release button 2 that is an operation member in the first embodiment. As a result, the number of parts can be reduced, and the manufacturing and assembling steps such as bonding of the cap can be omitted, so that the manufacturing and assembling time can be reduced and the manufacturing and assembling cost can be reduced.

(Modification) The first and second embodiments described above may be modified as follows. For example, when the release switch unit 30 mounted on the substrate 20 is pressed down, the shaft end 2 f of the shaft portion 2 is moved to the switch unit 3.
In this case, the second release is sequentially switched from the 1st release of the first stage to the 2nd release of the second stage. You may. Thereby, an effect equivalent to that of the first or second embodiment can be expected.

Further, since all of the illustrated embodiments are assumed to be manufactured by molding or injection molding using a synthetic resin or the like, each part needs to have a predetermined thickness or more in manufacturing. 2d1 and 2d2 for design considerations that do not cause
Although it is intentionally provided, it is also possible to manufacture by any other appropriate method, and the above-mentioned preliminary portion may not be necessary depending on the manufacturing method adopted. With this, a simple structure can be realized, and the same or higher effects as those of the first or second embodiment can be expected. In addition, various modifications can be made without departing from the spirit of the present invention.

Although the embodiments and the modified examples have been described above, the present invention includes the following inventions. (1) an operating member pressed by a predetermined stroke, a shaft extending from the operating member, and a front cover for covering a front portion of the camera body having a fitting portion fitted to the shaft.
A plurality of extending portions corresponding to the shaft portion around the shaft portion provided in the fitting portion, and provided at positions corresponding to the extending portions of the operating member, and the operating member is pressed. A structure of an operation button and a camera including the same, characterized by having an escape portion that does not come into contact with the extension portion in a state.

(2) An elastic member for urging the operation member in a direction away from the front cover, a locking claw engaged with the front cover provided on the operation member, and a claw provided on the front cover. An engaging portion for engaging with the locking claw, and in a state where the locking claw and the engaging portion are engaged with each other, an urging force by the elastic member acts in a direction in which the both engage with each other. The structure of the operation button according to (1), and a camera including the same, characterized by having such a configuration. (3) The structure of the operation button according to (2), wherein the front cover is molded by injection molding, and the engaging portion is molded by a fixed or movable mold of an injection mold. And a camera including the same.

[0037]

As described above, according to the present invention, while substantially satisfying both the fitting length of the shaft portion and the bearing portion and the operation stroke,
The size of the device (the structure of the operation buttons and the camera including the same) can be reduced. As a result, it is possible to provide a structure of an operation button which is space-saving and has good operability and a camera including the same.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure of an operation button according to a first embodiment of the present invention and an assembly structure of a camera including the same.

FIG. 2 is a partial cross-sectional view of a structure of an operation button showing a cross-sectional structure along a line AA in FIG. 1 and a camera including the same.

FIG. 3 is a partial cross-sectional view of a structure of an operation button and a camera including the same, showing a cross-sectional structure along a line BB in FIG. 1;

FIG. 4 is a partial cross-sectional view showing a structure on the back side of a base (release table) of a front cover of the camera.

FIG. 5 is a perspective view showing a structure of an operation button according to a second embodiment of the present invention and an assembly structure of a camera including the same.

6 is a partial sectional view of a structure of an operation button and a camera including the same, showing a sectional structure along a line AA in FIG. 5;

7 is a partial cross-sectional view of a structure of an operation button and a camera including the same, showing a cross-sectional structure along a line BB in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cap (button covering member: operation member), 1a ... Cap edge part, 2 ... Button (release button: operation member), 2a ... Shaft part, 2b ... Locking arm, 2b1, 2b2 ... Locking claw, 2c1 2c3: Relief portion (hole / recess), 2d1, 2d2: Cutout hole, 2e: Adhesion groove, 2f: Shaft end, 3: Spring (elastic member), 4: Base concave ring portion, 5: Fitting portion (Bearing portion), 5a: fitting hole (shaft hole portion), 5b: fitting wall, 5c1-5c3: extending portion, 6: base outer peripheral wall, 7a, 7b: hole (locking hole), 8a, 8b ... slope, 8a1, 8b1 ... slope end, 8a2, 8b2 ... engagement slope, 9 ... fitting wall peripheral base, 10 ... front cover, 10a ... base (front cover upper surface: release stand), 10b ... front cover Side surface, 13a, 13b ... engagement slope extension groove (V groove), 20 ... board (camera board), 30 ... switch (relief) 'S switch unit), 31 ... switch recess.

Claims (3)

[Claims] An operating member pressed by a predetermined stroke; a shaft extending from the operating member; and a base having a fitting portion fitted to the shaft. The joint portion has a plurality of extending portions corresponding to the shaft portion around the shaft portion, and at a predetermined position of the operating member corresponding to the extending portion, the operating member is pressed. A structure of an operation button, wherein a relief portion is formed so as not to contact the extension portion, and a camera including the same. 2. The apparatus according to claim 1, wherein the extending portions are provided at three places at substantially equal intervals around the shaft portion.
And a camera including the same. 3. The operation according to claim 1, wherein the escape portion is formed by a hole penetrating to the operation surface side of the operation member, and has a cover member that covers the hole. Button structure and camera including the same.