JP2018101082A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of facilitating assembly of a steel ball and a compression spring, which are placed in a direction generally perpendicular to the rotation axis of a rotation operation member, and which causes a change in a torque required for rotation when a rotation operation is made on the rotation operation member of rotation operation means.SOLUTION: The electronic apparatus has a rotation operation means which is rotatably supported with respect to a stationary portion. The rotation operation member has a cam surface in a direction generally perpendicular to a rotation axis. The stationary portion has a groove in a surface which is covered by the rotation operation member. A compression spring and a steel ball are mounted along the groove. When the rotation operation member is not assembled with the stationary portion, the compression spring, which is in a state being placed on the groove together with the steel ball, is in an uncompressed state, and when the rotation operation member is assembled with the stationary portion in a rotation axial direction, a point, where the steel ball comes into contact with the rotation operation member first, is a semi-sphere of the steel ball which comes into contact with the cam surface. The compression spring is compressed during assembling.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an electronic device including an imaging device such as a digital camera or a digital video camera, and more particularly to an electronic device including a rotation operation member.

  An image pickup apparatus such as a digital camera has been proposed that includes a rotation operation member (Patent Document 1). This rotary operation member is an operation dial that can be rotated, and is arranged so that the steel ball is urged by the coil spring to the engagement recess of the operation dial in a direction perpendicular to the rotation axis of the operation dial. . The steel ball and the coil spring are arranged inside the thickness of the operation dial to achieve miniaturization.

  When the photographer rotates the operation dial, the steel ball climbs over the mountain of the engaging recess, and the torque required to rotate the operation dial changes. The photographer feels this torque change as a click force.

JP 2004-327218 A

  In the operation dial of Patent Document 1, a steel ball and a coil spring are accommodated along a long groove on the case surface. When assembling the operation dial, the assembly operator adjusts the rotation phase of the operation dial to a position where the long groove can be seen from the insertion port provided in the pressing member that rotates integrally with the operation dial. Next, the steel ball and the coil spring are inserted into the long groove from the insertion port, and the steel ball is assembled so as to be urged by the coil spring toward the engagement recess of the operation dial in a direction perpendicular to the rotation axis of the operation dial. .

  As for the size of the coil spring to be assembled, when the dial thickness of the operation dial is thin and the diameter of the operation dial is small, the outer diameter of the coil spring is small and the natural length of the coil spring is adjusted to the space that can be placed in the operation dial. Shorter. When the outer diameter of the coil spring to be assembled is small and the natural length is shortened, there is a problem that it is difficult for the assembling operator to hold the coil spring during assembly.

  Furthermore, in order to prevent the built-in coil spring from easily popping out of the insertion slot due to vibration or dropping of electronic equipment, the opening length of the insertion slot in the coil spring expansion / contraction direction may be shorter than the natural length of the coil spring. is there. When inserting the coil spring into the insertion port, the assembly operator inserts the coil spring while compressing the coil spring to a compression height at which the coil spring can be inserted into the insertion port. Alternatively, only the tip of the uncompressed coil spring is inserted into the insertion port, and then the rear end of the inserted coil spring is pressed to compress the entire coil spring into the insertion port.

  At the time of pushing in the coil spring, the assembly operator's holding of the coil spring becomes unstable, and there is a problem that the coil spring is repelled outside the long groove.

  Therefore, the present invention relates to an electronic device having a rotation operation means arranged so that the steel ball and the compression spring are biased in a substantially vertical direction with respect to the rotation axis of the rotation operation member, and in particular, the steel ball and the compression spring. The purpose is to improve assembly.

  In order to solve the above problems, the electronic apparatus according to the first embodiment of the present invention includes a rotation operation member 112 that is rotatably supported with respect to the fixed portion 106a, and the rotation operation member 112 has a rotation shaft. Cam surfaces 112a and 112b are provided in a direction substantially perpendicular to Y, and a groove portion 106g is provided in a surface where the fixed portion 106a is covered with the rotation operation member 112. A compression spring 126 and a steel ball 127 are formed along the groove portion 106g. , And when the rotation operation member 112 and the fixed portion 106a are not assembled, the compression spring 126 placed in the groove portion 106g together with the steel ball 127 is in an uncompressed state, When the rotation operation member 112 and the fixed portion 106a are assembled in the direction of the rotation axis Y, the location where the steel ball 127 first contacts the rotation operation member 112 is in contact with the cam surfaces 112a and 112b. A hemisphere 127a of the steel balls 127 of that side, the compression spring 126 in the built-in is compressed, is characterized by having a rotational operation unit.

  The electronic apparatus according to the second embodiment of the present invention includes a rotation operation member 112 that is rotatably supported with respect to the fixed portion 106a, and the fixed portion 106a cams in a direction substantially perpendicular to the rotation axis Y. There is a groove portion 112h in the surface having the surfaces 106h and 106i and covered with the fixing portion 106a of the rotation operation member 112, and a compression spring 126 and a steel ball 127 are placed along the groove portion 112h. When the operation member 112 and the fixing portion 106a are not assembled, the compression spring 126 placed in the groove portion 112h together with the steel ball 127 is in an uncompressed state, and the rotation operation member 112 and the fixing portion 106a are not compressed. Are assembled in the direction of the rotation axis Y, the location where the steel ball 127 first comes into contact with the fixed portion 106a is the steel ball 127 on the side in contact with the cam convex surface 106h and the cam concave surface 106i. A hemisphere 127a, the compression spring 126 is compressed in the incorporation is characterized by having a rotational operation unit.

  According to the present invention, after the compression spring 126 and the steel ball 127 in a non-compressed state are placed in the groove (106g or 112h), the steel ball is simply assembled by assembling the rotation operation member 112 and the fixed portion 106a in the direction of the rotation axis Y. 127 and the compression spring 126 can be compressed and assembled to a desired position. It is possible to provide an electronic apparatus having a rotation operation means that facilitates assembling of a steel ball and a compression spring.

The perspective view which looked at the digital camera which is an example of the embodiment of the electronic device of the present invention from the front side (subject side) The perspective view which looked at the digital camera which is an example of embodiment of the electronic device of this invention from the back side (photographer side) Exploded perspective view of rotation operation means Sectional view of rotation operation means (a) Perspective view showing an enlarged part of the extension part (b) Perspective view showing a state in which a compression spring and a steel ball are incorporated in the groove part (a) Sub dial perspective view on the cam surface side (b) Sub dial perspective view on the brush contact piece side for the sub dial (a) Cross-sectional view of the sub-dial assembled in the direction of the rotation axis until it contacts the steel ball (b) Cross-sectional view of the sub-dial and the extension portion assembled in the direction of the rotation axis Development of the board Extension dial perspective view on the sub-dial surface side (a) Sub dial perspective view on the brush contact side for sub dial (b) Sub dial perspective view on the groove side (c) Perspective view of a sub dial in which a compression spring and a steel ball are incorporated in the groove (a) Cross-sectional view with the extension part assembled until it contacts the steel ball (b) Cross-sectional view with the extension part and sub-dial assembled in the rotation axis direction

[First Embodiment]
Hereinafter, an example of the first embodiment of the present invention will be described with reference to the drawings. The main components of the digital camera will be described with reference to FIGS. FIG. 1 is a perspective view of a digital camera, which is an example of an embodiment of an electronic apparatus according to the invention, viewed from the front side (subject side). FIG. 2 is a perspective view of a digital camera, which is an example of an embodiment of the electronic apparatus according to the invention, viewed from the back side (photographer side).

  As shown in FIGS. 1 and 2, the digital camera according to the present embodiment forms the exterior of the camera body 100 by the front cover 101, the back cover 102, the right cover 104, the top cover 106, and the bottom cover 107. doing. A photographing lens 103 is provided on the front side of the camera body 100. A release button 114 is provided on the upper surface side of the camera body 100. When the release button 114 is pressed, an image through the photographing lens 103 is captured by an image sensor inside a digital camera (not shown), converted into image information by an image processing means (not shown), and recorded on a storage medium (not shown). Is done.

  An exposure correction dial 111 is provided on the upper surface side of the camera body 100 as a first rotation operation member at the uppermost end of the upper surface side cover 106. The exposure correction dial 111 can reciprocate within a predetermined rotation angle. The digital camera is configured so that the exposure correction amount of the digital camera can be selected by detecting the rotational operation position of the exposure correction dial 111. A sub dial 112 is arranged as a second rotation operation member under the exposure correction dial 111. The sub dial 112 can rotate one or more times in the forward and reverse directions.

  The digital camera detects the rotation angle and rotation direction of the sub dial 112 so that various correction values can be selected, such as changing the ISO sensitivity and shutter speed at the time of shooting by the digital camera. A power lever 109 is provided under the sub dial 112 as a third rotation operation member. The power lever 109 can reciprocate within a predetermined rotation angle. When the digital camera detects the stop position of the power lever 109, it can detect whether the main power is on or off. In an example of the rotation operation means of the present embodiment, the first, second, and third rotation operation members are configured to rotate coaxially.

  A pop-up strobe unit 105 is further provided on the upper surface side of the camera body 100. Although not shown, the pop-up strobe unit 105 pops up the strobe light emitting unit from the camera body 100 when the strobe light is emitted, and appropriately emits strobe light when photographing. A display unit 108 such as an LCD is supported on the back side of the camera body 100 so as to be rotatable in the opening / closing direction with respect to the camera body 100.

  Next, the configuration of the rotation operation means according to the first embodiment of the present case will be described with reference to FIGS. 6 (a), 6 (b), 3, and 4. FIG. FIG. 6A is a perspective view of the sub dial on the cam surface side. In FIG. 6 (a), the sub dial 112 as the second rotation operation means is a cam in which the cam convex surface 112a and the cam concave surface 112b are continuous along the circumferential direction around the rotation axis Y of the sub dial 112. The surface is provided facing the rotation axis Y direction. An inclined surface 112c is provided at the end of the cam convex surface 112a and the cam concave surface 112b in the rotation axis Y direction.

  The sub dial 112 has a hole 112d for restricting the rotation center of the sub dial 112 and a rotation position index 112e. The rotational position index 112e has a shape in which a part of the hole 112d has a concave shape, and the direction of the concave shape of the rotational position index 112e coincides with the normal direction of one cam concave surface 112b and the rotation axis Y.

  FIG. 6B is a perspective view of the sub dial on the side of the sub dial brush contact piece. In FIG. 6B, the perspective view of the sub dial 112 in FIG. 6B is a perspective view of the opposite side of the sub dial 112 shown in FIG. The sub dial brush contact piece 119 is made of metal and has electrical conductivity. A mounting position on the sub dial 112 is determined by a positioning dowel 112f provided on the sub dial 112, and is joined to the sub dial 112 by a joint 112g.

  FIG. 3 is an exploded perspective view of the rotation operation means. FIG. 4 is a cross-sectional view of the rotation operation means. FIG. 4 is a cross-sectional view in a state where the assembly of the rotation operation means is completed. 3 is an exploded view of the rotary operation member of FIG. 3 and 4, the rotation operation means of this embodiment includes an exposure correction dial 111, a sub dial 112, and a power lever 109, which are three rotation operation members. It is provided so as to overlap the axis Y coaxially. The exposure correction dial 111 located at the uppermost end is integrally joined to the decorative board 111a in the outer appearance portion with an adhesive.

  In the exposure correction dial 111, the restriction in the rotation axis Y direction is performed at two places: an H portion of an extending portion 106a described later and an I portion of a top base 121 described later. Further, the exposure correction dial 111 is controlled in a direction F perpendicular to the rotation axis Y in an extension portion 106a of an extension portion 106a, which will be described later, and a G portion of a top base 121, which will be described later. Held possible. The first sealing member 115 is simultaneously bonded in a state where the first sealing member 115 is fitted in the hole 111b provided in the exposure correction dial 111 when the decorative plate 111a is bonded.

  The steel ball 116 is arranged so as to abut on a cam surface (not shown) provided on the dial inner surface of the exposure correction dial 111, and the compression spring 117 cams the steel ball 116 in a direction substantially perpendicular to the rotation axis Y. Energized in the direction. The extending portion 106 a is a part of the upper surface side cover 106 that extends from the end portion of the upper surface side cover 106, and is formed integrally with the upper surface side cover 106. The extension part 106 a is a fixed part fixed to the camera body 100. The second sealing member 118 closes the hole portion 106f described in FIG. 5 provided in the extending portion 106a. The top base 121 is fixed to the inner surface of the upper surface side cover 106 with a plurality of screws 122.

  The sub dial 112 is formed of resin, and the restriction in the direction of the rotation axis Y is performed at two places, the J portion of the extending portion 106 a and the K portion of the top base 121. Further, the sub-dial 112 is restricted in the direction perpendicular to the rotation axis Y at the L portion of the top base 121 and is held rotatably with respect to the top base 121. As shown in FIG. 6, a continuous cam surface including a cam convex surface 112a and a cam concave surface 112b is provided on the inner surface of the sub dial 112 so as to face the rotation axis Y direction. The cam convex surface 112a greatly compresses the compression spring 126 in the rotation axis Y direction via the steel ball 127.

  Therefore, when the sub dial 112 is rotated and the steel ball 127 gets over the cam convex surface 112a, the required torque for rotation becomes high. On the contrary, the cam concave surface 112b compresses the compression spring 126 small in the direction of the rotation axis Y via the steel ball 127. Therefore, when the sub dial 112 is rotated and the steel ball 127 gets over the cam concave surface 112b, the required torque for rotation becomes low. When the sub dial 112 is continuously rotated, the pressing force of the compression spring 126 when the steel ball 127 passes over the cam convex surface 112a and the cam concave surface 112b in order changes.

  The rotational torque required to rotate the sub dial 112 changes, and this change is recognized as a click force by a person who rotates the sub dial 112. The power lever 109 is regulated in two places, the M portion of the top base 121 and the N portion of the sub-dial 112, in the direction of the rotation axis Y, and further in the direction perpendicular to the rotation axis Y. It is performed in 121 part O. The power lever 109 is held rotatably with respect to the top base 121. The compression spring 126 and the steel ball 127 are housed in a groove portion 106g described later of the extending portion 106a.

  The steel ball 128 and the compression spring 129 are accommodated in a groove (not shown) provided on the inner surface of the upper surface side cover 106 and are disposed so as to contact a cam surface (not shown) provided on the power lever 109. The sub-dial pattern portion 120a forms part of the substrate 120, which will be described later with reference to FIG. Similarly, the exposure correction dial pattern portion 120b forms part of the substrate 120, which will be described later with reference to FIG. 8, and is used to detect the rotational position of the exposure correction dial 111. The sub dial pattern portion 120a is attached to the surface of the top base 121 on the side facing the sub dial brush contact piece 119.

  The exposure correction dial pattern portion 120b is attached to the surface of the top base 121 on the side facing an exposure correction brush contact piece 123 described later. The retaining plate 124 is positioned on the shaft 111 c of the exposure correction dial 111 and is fixed to the shaft 111 c of the exposure correction dial 111 with a screw 125, and rotates integrally with the exposure correction dial 111. The exposure correction dial brush contact piece 123 is made of metal and has electrical conductivity, is joined to the retaining plate 124 and rotates integrally with the exposure correction dial 111.

  FIG. 8 is a development view of the substrate. As shown in FIG. 8, the substrate 120 is, for example, a flexible substrate that can be bent, and is configured by connecting a sub-dial pattern portion 120a and an exposure correction pattern portion 120b, and each pattern portion has a desired brush. It is bent to face the contact piece.

  Next, a method for assembling the rotation operation means of this embodiment will be described. First, the assembly method of the first embodiment until the steel ball 127 and the compression spring 126 are placed on the extending portion 106a will be described with reference to FIGS. 5 (a) and 5 (b). Fig.5 (a) is the perspective view which expanded a part of extension part. In FIG. 5A, a groove 106g is provided in the surface where the extended portion 106a is covered with the sub dial 112. The groove portion 106g is provided with a bottom surface 106b, a side surface 106c, a receiving surface 106d, and a receiving surface 106e. In the middle of the bottom surface 106b, there is a through hole 106f.

  The groove portion 106g has a bottom surface 106b and a side surface 106c extending in a direction perpendicular to the rotation axis Y, and both ends thereof are surrounded by a receiving surface 106d on the side far from the rotation axis Y and a receiving surface 106e on the side near the rotation axis Y. It is. The assembly operator first installs the compression spring 126 in contact with the receiving surface 106e at one end in the groove 106g in FIG. Next, the steel ball 127 is assembled between the receiving surface 106 d of the groove 106 g and the end of the compression spring 126.

  FIG.5 (b) is the perspective view which showed the state in which the compression spring and the steel ball were integrated in the groove part. As shown in FIG. 5B, the compression spring 126 is not compressed by the steel ball 127 when the compression spring 126 and the steel ball 127 are merely placed along the groove 106g. Therefore, the steel ball 127 is not pushed out of the groove portion 106g by the elastic force of the compression spring 126, and the steel ball 127 is held by the receiving surface 106d and the end portion of the compression spring 126, so that it does not fall out of the groove portion 106g.

  The assembly operator does not need to hold the compression spring 126 while compressing it in order to assemble it in the state shown in FIG. 5B, and only needs to hold the compression spring 126 that is not compressed and place it in the groove 106g. Similarly, the steel ball 127 does not need to be incorporated while compressing the compression spring 126, and only needs to be placed between the end of the compression spring 126 and the receiving surface 106d.

  As described above, since the assembly operator does not need to compress the compression spring 126 in order to place the compression spring 126 and the steel ball 127 in the groove 106g, the compression spring 126 and the steel ball 127 being assembled can be removed. There are few unintentional jumps and loss from the groove 106g, and assembly work is easy.

  Next, with reference to FIGS. 7A and 7B, the extension 106a on which the steel ball 127 and the compression spring 126 described with reference to FIG. 5B of the sub dial 112 described with reference to FIG. An assembly method in the first embodiment will be described.

  FIG. 7A is a cross-sectional view in which the sub-dial is assembled in the direction of the rotation axis until it contacts the steel ball. First, the assembly operator rotates the sub dial 112 so that the rotation position index 112e of the sub dial 112 coincides with the groove portion 106g so as to make the state shown in FIG. Assembly is performed in the direction of drawing A, which coincides with the rotational axis Y of 112. The reason why the rotational position index 112e is matched with the groove 106g is to reduce the amount of movement of the steel ball 127 that moves by assembling the sub dial 112 in the A direction.

  The rotational position index 112e indicates one phase of the cam concave surface 112b where the compression amount of the compression spring 126 is small. If the movement amount of the steel ball 127 and the compression spring 126 is reduced, the assembly force to be assembled in the A direction of the sub dial 112 necessary for compressing the compression spring 126 is reduced, and the assembly is facilitated. When the assembling worker incorporates the sub dial 112 in the A direction so as to coincide with the rotation axis Y on the extending portion 106a side, as shown in FIG. 7A, the steel ball on the side in contact with the cam surfaces 112a and 112b. The inclined surface 112c of the sub dial is in contact with the hemispherical surface 127a of 127.

  In the state of FIG. 7A, let B be the gap in the direction of assembly A between the upper end of the steel ball 127 and the sub dial 112. Further, let C be a gap where the extension 106a and the sub dial 112 in the direction A and the direction perpendicular to each other can be eccentric. Since both the gap B and the gap C are smaller than the diameter of the steel ball 127, the steel ball 127 does not jump out of the gap between the sub dial 112 and the extension part 106a during the sub dial 112 assembly. When an assembly auxiliary tool such as a through shaft that regulates the rotation axis Y of the extension part 106a and the sub dial 112 is used at the time of assembly, the extension part does not necessarily have to have the gap C smaller than the diameter of the steel ball 127. 106a and the sub dial 112 are not easily displaced in the direction perpendicular to the rotation axis Y during assembly.

  Next, the assembly operator further pushes the sub-dial 112 in the direction of the drawing A coinciding with the rotation axis Y from the state of FIG. Then, the hemisphere 127a of the steel ball 127 is pushed by the inclined surface 112c of the sub dial 112, and the compression spring 126 is compressed in the direction of the receiving surface 106e via the pushed steel ball 127.

  The steel ball 127 falls on the cam surface 112b having a small compression amount along the inclined surface 112c. The cam concave surface 112b having a small amount of compression is phase-matched with the groove 106g so that the sub dial 112 is assembled. Therefore, the amount of movement of the steel ball 127 from the inclined surface 112c to the cam concave surface 112b causes the cam convex surface 112a and the groove 106g to coincide. Therefore, the compression spring 126 is compressed smoothly.

  FIG.7 (b) is sectional drawing of the state in which the sub dial and the extension part were assembled in the rotating shaft direction. FIG. 7B shows a state in which the sub dial 112 has been incorporated into the extending portion 106a in the A direction coinciding with the rotation axis Y.

  As described above, the assembly operator simply completes the compression work of the compression spring 126 by the steel ball 127 up to a desired position by pushing the sub dial 112 in the A direction that coincides with the rotation axis Y. In the assembly from FIG. 7 (a) to FIG. 7 (b), the assembly operator does not perform the compression work by directly contacting the compression spring 126 or the steel ball 127, so that the groove 106g of the compression spring 126 or the steel ball 127 being assembled is not. There is little unintentional pop-out or loss from the side, and assembly work itself is easy.

  A method for assembling the rotation operation means after the sub-dial 112 is assembled to the extending portion 106a in FIG. 7B will be described with reference to FIGS. The assembly operator fits the power lever 109 into the sub dial 112 and incorporates the steel ball 128 and the compression spring 129 into a groove (not shown) of the extending portion 106a. Further, the top base 121 to which the substrate 120 is attached is assembled to the extending portion 106 a and fixed using two screws 122. The assembling operator confirms that the compression spring 126 is assembled in a desired state without falling down from the hole 106f provided in the extending part 106a, and then attaches the second sealing member 118 to the hole. 106f is fitted, and the exposure correction dial 111 is fitted along the rotation axis Y into the extending portion 106a.

  The retaining plate 124 to which the exposure correction dial contact piece 123 is joined is positioned on the shaft 111 c of the exposure compensation dial 111, and the retaining plate 124 is fixed to the exposure compensation dial 111 with a screw 125. The steel ball 116 and the compression spring 117 are inserted from the hole 111b of the exposure correction dial 111 held rotatably in the extension part 106a, and incorporated in a groove part (not shown) of the extension part 106a. After the assembly is completed, the first sealing member 115 is fitted into the exposure correction dial hole and bonded together with the decorative plate 111a. As described above, the rotation operation means of this embodiment is assembled.

  The shape of the groove portion 106g described in the first embodiment is an example, and the steel ball 127 and the compression spring 126 that are placed during the sub dial 112 assembly are not easily dropped from the groove portion 106g of the extension portion 106a. Any other shape can be used. In the first embodiment, the compression spring 126 receiving surface 106e of the groove 106h is provided on the side near the rotation axis Y, and the steel ball 127 receiving surface 106d is provided on the side far from the rotation axis Y.

  However, the cam surfaces 112a and 112b of the sub-dial 112 as in the first embodiment are not cam surfaces in the direction toward the rotation axis Y, but conversely, the cam surfaces in the direction outward from the rotation axis Y center. . In the case of such a cam surface, the steel ball 127 receiving surface 106d of the groove 106h may be provided on the side close to the rotation axis Y, and the compression spring 126 receiving surface 106e may be provided on the side far from the rotation axis Y. In the first embodiment, as an example of the rotation operation member of the rotation operation means, the sub-dial 112 that is the second rotation operation member has been described as an example. However, other rotation operation members may be used. .

[Second Embodiment]
In order to feel the click force when the sub dial 112 is rotated, it is only necessary to rotate the sub dial 112 so that the amount of compression of the steel ball 127 and the compression spring 126 by the cam surface is changed.

  In the first embodiment, the steel ball 127 and the compression spring 126 are held by the groove portion 106g provided in the extending portion 106a which is a fixing portion of the camera body 100, and the cam convex surface of the sub dial 112 which is a rotation operation member. The compression spring 126 was compressed by 112a and the cam concave surface 112b. In the second embodiment, contrary to the first embodiment, the extended portion 106a is provided with a cam convex surface 106h and a cam concave surface 106i, and the steel ball 127 and the compression spring 126 are held on the sub dial 112 side. A groove portion 112h was provided.

  The configuration of the second embodiment will be described with reference to FIGS. FIG. 9 is a perspective view of the extending portion on the sub dial surface side. In FIG. 9, the extending portion 106a used in the second embodiment has a cam surface in which the cam convex surface 106h and the cam concave surface 106i are continuous along the circumferential direction around the rotation axis Y of the sub dial 112. It is provided facing the axial direction. The cam convex surface 106h and the cam concave surface 106i are configured so that when the photographer rotates the sub-dial 112, the steel ball 127 urged by the elastic force of the compression spring 126 gets over the cam convex surface 106h and the cam concave surface 106i to generate the click force. It is for generating.

  The cam convex surface 106h greatly compresses the compression spring 126 through a steel ball 127 toward a receiving surface 112m of a sub dial 112 described later. The cam concave surface 106 i compresses the compression spring 126 through the steel ball 127. An inclined surface 106j is provided at the end of the cam convex surface 106h and the cam concave surface 106i in the rotation axis Y direction. The extending portion 106a has a hole 106k for restricting the rotation of the sub dial 112 and a rotation position index 106m. The rotational position index 106m has a shape in which a part of the hole 106k has a concave shape, and the direction of the concave shape of the rotational position index 106m coincides with the normal direction of one cam concave surface 106i and the rotation axis Y.

  FIG. 10 (a) is a perspective view of the sub dial on the sub dial brush contact side. In FIG. 10 (a), the sub dial brush contact piece 119 is positioned at the sub dial 112 by a positioning dowel 112f provided on the sub dial 112, and joined to the sub dial 112 by a joint 112g. It is integrated.

  FIG. 10 (b) is a perspective view of the sub dial on the groove side. FIG. 10B is a perspective view of the opposite surface side of the subdial 112 shown in FIG. A part of the surface of the sub dial 112 having the groove 112h is a D portion. The groove 112h is provided in the sub dial 112. The groove portion 112h is in a plane where the sub dial 112 is covered with the extending portion 106a. The groove portion 112h is provided with a bottom surface 112i, a side surface 112j, a receiving surface 112k, and a receiving surface 112m. In the middle of the bottom surface 112i, there is a through hole 112n.

  The groove portion 112h has a bottom surface 112i and a side surface 112j extending in a direction perpendicular to the rotation axis Y, and both end portions thereof are a receiving surface 112k on the side far from the rotation axis Y and a receiving surface 112m on the side close to the rotation axis Y. being surrounded.

  FIG.10 (c) is a perspective view of the sub dial in which the compression spring and the steel ball were integrated in the groove part. As shown in FIG. 10 (c), the assembling worker first installs one end portion of the compression spring 126 in contact with the receiving surface 112 m of the sub dial 112. Next, the steel ball 127 is assembled between the receiving surface 112 k of the groove 112 h and the end of the compression spring 126. In a state where the compression spring 126 and the steel ball 127 are merely placed along the groove 112h shown in FIG. 10C, the compression spring 126 is not compressed by the steel ball 127.

  Therefore, the steel ball 127 is not pushed out of the groove 112h by the elastic force of the compression spring 126, and the steel ball 127 is held by the receiving surface 112k and the end of the compression spring 126, so that it does not fall out of the groove 112h. The assembly operator does not need to hold the compression spring 126 while compressing it in order to assemble it in the state shown in FIG. 10C, and only needs to hold the uncompressed compression spring 126 and place it in the groove 112h. Similarly, it is not necessary to incorporate the steel ball 127 while compressing the compression spring 126, and it is only necessary to place it between the end of the compression spring 126 and the receiving surface 112k.

  As described above, as in the first embodiment, the assembly operator does not need to perform the compression work of the compression spring 126 in order to place the compression spring 126 and the steel ball 127 in the groove 112h. For this reason, there is little unintentional protrusion and loss from the compression spring 126 and the groove 112h of the steel ball 127 during assembly, and the assembly work itself is easy.

  Next, referring to FIG. 11, a second embodiment of the extending portion 106a described in FIG. 9, and the sub dial 112 on which the steel ball 127 and the compression spring 126 described in FIG. The assembly method will be described.

  Fig.11 (a) is sectional drawing of the state integrated until the extension part contacted the steel ball. In FIG. 11 (a), the assembling worker assembles the extension part 106a and the sub dial 112 on which the compression spring 126 and the steel ball 127 are placed in an uncompressed state in FIG. 10 (c). First, the assembly worker rotates the extension portion 106a so that the rotation position index 106m of the extension portion 106a coincides with the groove portion 112h to obtain the state shown in FIG. Assembly is performed in the direction of the drawing A, which coincides with the rotation axis Y of the sub dial 112.

  The reason why the rotational position index 106m is aligned with the groove 112h is to reduce the amount of movement of the steel ball 127 that moves by assembling the extending portion 106a in the A direction as much as possible. The rotational position index 106m indicates one phase of the cam concave surface 106i where the compression amount of the compression spring 126 is small. If the movement amount of the steel ball 127 and the compression spring 126 is reduced, the assembly force to be assembled in the A direction of the sub dial 112 necessary for compressing the compression spring 126 is reduced, and the assembly is facilitated.

  When the extending portion 106a is dropped in the A direction so as to coincide with the rotation axis Y, the inclined surface 106j of the extending portion 106a contacts the hemispherical surface 127a of the steel ball 127 on the side contacting the cam convex surface 106h and the cam concave surface 106i. It will be in the state shown to 11 (a). As shown in FIG. 11 (a), the gap between the upper end of the steel ball 127 and the extension 106a in the direction of incorporation A is B. Further, let C be a gap where the extension 106a and the sub dial 112 in the direction A and the direction perpendicular to each other can be eccentric. Since both the gap B and the gap C are smaller than the diameter of the steel ball 127, the steel ball 127 does not jump out of the gap between the sub dial 112 and the extension part 106a during the sub dial 112 assembly.

  When an assembly auxiliary tool such as a through shaft that regulates the rotation axis Y of the extension part 106a and the sub dial 112 is used during assembly, the extension part 106a is not necessarily made the diameter C of the steel ball 127 or less. The sub dial 112 is difficult to be displaced in the direction perpendicular to the rotation axis Y during assembly. When the assembling worker further pushes the upper surface side cover 106 in the direction of the drawing A coinciding with the rotation axis Y from the state of FIG. Thus, the compression spring 126 is compressed in the direction of the receiving surface 112m through the pushed steel ball 127.

  The steel ball 127 falls on the cam surface 106i having a small compression amount along the inclined surface 106j. Since the upper surface side cover 106 is assembled with the cam concave surface 106i having a small compression amount aligned with the groove portion 112h, the amount of movement from the inclined surface 106j of the steel ball 127 to the cam concave surface 106i aligns the cam convex surface 106h with the groove portion 112h. As a result, the compression spring 126 is smoothly compressed.

  FIG. 11B is a cross-sectional view showing a state in which the extending portion and the sub dial are assembled in the rotation axis direction. FIG. 11B shows a state in which the extension portion 106a has been incorporated into the sub dial 112 in the A direction.

  As described above, the assembling worker simply pushes the extending portion 106a in the A direction coinciding with the rotation axis Y, and the compression work of the compression spring 126 by the steel ball 127 to the desired position is completed. In the assembly from FIG. 11 (a) to FIG. 11 (b), the compression worker 126 and the steel ball 127 are not brought into direct contact with the assembly worker to perform the compression work. Therefore, the groove 112h of the compression spring 126 and the steel ball 127 being assembled. There is little unintentional pop-out or loss from the side, and assembly work itself is easy.

  The shape of the groove 112h described in the second embodiment is an example, and the mounted steel ball 127 and the compression spring 126 are not easily dropped from the groove 112h of the sub dial 112 while the extension 106a is assembled. Any other shape can be used.

  In the second embodiment, the compression spring 126 receiving surface 112m of the groove 112h is provided on the side close to the rotation axis Y, and the steel ball 127 receiving surface 112k is provided on the side far from the rotation axis Y. However, the cam surfaces 106h and 106j of the extending portion 106a as in the second embodiment are not cam surfaces in the direction toward the rotation axis Y, but conversely in the cam surfaces in the direction outward from the center of the rotation axis Y. To do. In the case of such a cam surface, the steel ball 127 receiving surface 112k of the groove 112h may be provided on the side close to the rotating shaft Y, and the compression spring 126 receiving surface 112m may be provided on the side far from the rotating shaft Y.

  In the second embodiment, as an example of the rotation operation member of the rotation operation member, the sub-dial 112 as the second rotation operation member has been described as an example. However, other rotation operation members may be used. .

DESCRIPTION OF SYMBOLS 100 Camera body 101 Front side cover 102 Back side cover 103 Shooting lens 104 Right side cover 105 Strobe unit 106 Upper surface side cover 106a Extension part 106b Bottom face 106c Side face 106d Reception surface 106e Reception surface 106f Hole part 106g Groove part 106h Cam convex surface 106i Cam concave surface 106j Inclined surface 106k Hole 112h Groove portion 106m Rotation position indicator 107 Bottom side cover 108 Display unit 109 Power lever 111 Exposure correction dial 111a Decorative plate 111b Hole portion 111c Shaft 112 Sub dial 112a Cam convex surface 112b Cam concave surface 112c Inclined surface 112d Hole 112e Rotation position Index 112f Positioning dowel 112g Heat caulking portion 112h Groove portion 112i Bottom surface 112j Side surface 112k Receiving surface 112m Receiving surface 112n Hole 114 Release button 115 First sealing member 116 Steel ball 17 Compression spring 118 Second sealing member 119 Sub dial brush contact piece 120 Substrate 120a Sub dial pattern portion 120b Exposure correction dial pattern portion 121 Top base 122 Screw 123 Exposure correction brush contact piece 124 Retaining plate 125 Screw 126 Compression spring 127 Steel ball 127a Hemispherical surface 128 of steel ball 127 in contact with cam surface

Claims (6)

There is a rotation operation member 112 that is rotatably supported with respect to the fixed portion 106a. The rotation operation member 112 has cam surfaces 112a and 112b in a direction perpendicular to the rotation axis Y, and the fixed portion 106a has the rotation operation. There is a groove 106g in the surface covered with the member 112, and a compression spring 126 and a steel ball 127 are placed along the groove 106g.
When the rotation operation member 112 and the fixed portion 106a are not assembled, the compression spring 126 placed in the groove portion 106g together with the steel ball 127 is in an uncompressed state,
When the rotation operation member 112 and the fixed portion 106a are assembled in the direction of the rotation axis Y, the location where the steel ball 127 first contacts the rotation operation member 112 is the steel on the side in contact with the cam surfaces 112a and 112b. An electronic device comprising a hemisphere 127a of a sphere 127 and having a rotation operation means in which a compression spring 126 is compressed during assembly.   The groove portion 106g according to claim 1 includes a bottom surface 106b on which the compression spring 126 and the steel ball 127 are placed, a side surface 106c along a spring expansion / contraction direction of the compression spring 126, and a spring expansion / contraction of the compression spring 126. There is a receiving surface 106e facing one end side in the direction and a receiving surface 106d facing the steel ball 127 placed on the other end side in the spring expansion / contraction direction of the compression spring 126. Electronic equipment characterized by having.   The dial 112 according to claim 1 or 2 and the fixing portion 106a are assembled in the direction of the rotation axis Y, and when the dial 112 first contacts the steel ball 127, the surface of the steel ball 127 and the dial 112 are assembled. An electronic apparatus having a rotation operation means in which the gap B with respect to the rotation axis Y direction is equal to or less than the diameter of the steel ball 127. There is a rotation operation member 112 that is rotatably supported with respect to the fixed portion 106 a, the fixed portion 106 a has cam surfaces 106 h and 106 i in a direction perpendicular to the rotation axis Y, and the fixed portion of the rotation operation member 112 106a has a groove 112h in the surface covered with 106a, and a compression spring 126 and a steel ball 127 are placed along the groove 112h.
When the rotation operation member 112 and the fixed portion 106a are not assembled, the compression spring 126 placed in the groove portion 112h together with the steel ball 127 is in an uncompressed state,
When the rotation operation member 112 and the fixed portion 106a are assembled in the direction of the rotation axis Y, the steel ball 127 is first contacted with the fixed portion 106a at a position where the steel convex surface 106h and the cam concave surface 106i are in contact with each other. An electronic device having a hemispherical surface 127a of a sphere 127 and having a rotation operation means in which the compression spring 126 is compressed during assembly.   The groove 112h according to claim 4 includes a bottom surface 112i on which the compression spring 126 and the steel ball 127 are placed, a side surface 112j along the spring expansion / contraction direction of the compression spring 126, and a spring expansion / contraction of the compression spring 126. There is a receiving surface 112m facing one end side of the direction and a receiving surface 112k facing the steel ball 127 placed on the other end side of the compression spring 126 in the spring expansion and contraction direction. Electronic equipment characterized by having.   The dial 112 according to claim 4 or 5 and the fixing portion 106a are assembled in the direction of the rotation axis Y, and when the fixing portion 106a first contacts the steel ball 127, the surface of the steel ball 127 and the fixing portion are fixed. An electronic apparatus comprising a rotation operation means in which a gap B between the portion 106a and the rotation axis Y direction is equal to or less than a diameter of the steel ball 127.