JP5300430B2 - Electronics - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic appliance allowing miniaturization without increase of the number of parts or sacrificing the operation feeling while providing an electrostatic countermeasure of operation members. <P>SOLUTION: The appliance includes a release button 2, a conductive release cap 4 mounted on the release button 2, and a release spring 6 for energizing the release button and electrically connected with the release cap 4. One tip part 6a of the release spring 6 is clamped between the release button 2 and the release cap 4 so as to be charged. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an electronic device (for example, an electronic still camera), and more particularly, to an electronic device characterized by static electricity countermeasure technology.

  The operation member used for the release button of a conventional electronic still camera is a resin member that has been plated or a metal zoom lever, and the release button has a metal cap. There were many cases.

In such an operation member, the cap member needs to be brought into contact with a portion that is electrically at the ground potential in order to prevent static electricity.

  FIG. 12 shows a configuration in which a release button is grounded to a chassis or the like via a button biasing spring (Patent Document 1).

  Specifically, this figure is a unit configuration diagram of an operation member in which a release button and a zoom lever of an electronic still camera are integrated, and a stainless release cap 101 is bonded to a resin release button 102 as a base. And fix.

  Further, a coil spring 104 that urges the release button 102 and a pair of claws 102 b provided on the release button 102 are engaged with the zoom lever 103 so as to be movable in the vertical direction, and are integrally attached to the top base 105.

  The release button 102 has a through hole 102a in a part of the contact surface with the release cap 101, and the tip 104a of the coil spring 104 passes through the through hole 102a and comes into contact with the release cap 101. Conductivity is ensured with the zoom lever 103.

Although not shown, the zoom lever 103 is connected to the metal chassis via a ground spring, and allows static electricity applied to the release cap 101 to escape to the metal chassis.
JP-A-6-75676

  In the above prior art, the contact pressure is ensured only by the spring urging force generated between the coil spring 104 and the release cap 101. Therefore, the contact resistance between the coil spring 104, the release cap 101, and the zoom lever 103 may increase.

  As a result, when static electricity is applied to the release cap 101, the static electricity directly causes secondary discharge from the release cap 101 to the zoom lever 103 without passing through the coil spring 104, and the camera system may hang up.

  In order to avoid this, it is necessary to reduce the resistance value between the release cap 101 and the zoom lever 103 to secure the ground. However, for this reason, there is a problem that if the spring force of the coil spring 104 is increased to increase the contact pressure, the operational feeling is impaired, and the camera cannot be downsized due to the increase in the size of the spring.

  An object of the present invention is to provide an electronic device that can be reduced in size without increasing the number of components, without sacrificing the operational feeling, and capable of taking countermeasures against static electricity of an operation member.

In order to achieve the above object, an electronic device according to the present invention includes a push button, a conductive cap member attached to the push button, and urges the push button and is electrically connected to the cap member. A coil spring, wherein one end of the coil spring is charged in a direction 90 degrees different from a direction in which the coil spring urges the push button, and the push button is pressed in a state of pressing the side surface of the cap member. It characterized sandwiched Tei Rukoto between the cap member.

  According to the electronic device of the present invention, it is possible to reduce the size without increasing the number of components, without sacrificing the operational feeling, and to take measures against static electricity of the operation member.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an external perspective view of an electronic still camera as an electronic apparatus according to an embodiment of the present invention.

  In FIG. 1, a release button 2 and a zoom lever 3 are provided on the upper part of the camera body 1. The release button 2 is integrally formed with the central portion of the zoom lever 3 and is attached to the zoom lever 3 that can be slid freely so that the zoom lever 3 can be pressed vertically.

  The exterior of the camera body 1 is made of metal, and in the present embodiment, the zoom lever 3 is also made of zinc die cast.

  The release button 2 can be moved up and down when the zoom lever 3 is pressed, and consideration is given to prevent the release button 2 from being tilted or being displaced and being caught in the middle. Has been made. That is, an appropriate clearance is provided between the release button 2 and the zoom lever 3.

  Also, the clearance between the zoom lever 3 and the release button 2 is about 0.2 to 0.3 mm in order to prevent the release button 1 from being peeled off by inadvertently entering the photographer's nails, thread, string, or the like. It is necessary to suppress.

Under such circumstances, when static electricity is applied, if the connection with the portion of the release button 2 that is at the ground potential is insufficient, secondary discharge is caused to the zoom lever 3 and the system is hung up. As described above, there was a possibility.

In the present invention, the connection with the portion of the release button 2 that is at the ground potential is ensured, and a stable ground is ensured.

(First embodiment)
FIG. 2 is an exploded perspective view of the first embodiment of the release button mechanism in the electronic still camera of FIG.

  In FIG. 2, the operation member (release button mechanism) of the camera body 1 includes a release cap 4, a release button 2, a release spring 6, a zoom lever 3, a top base 8, a zoom fixing plate 9, and a zoom ground plate 10 (10a, 10b). The chassis 11 is provided.

  The release button 2 is a push button. The zoom lever 3 is a ring member that can be rotated or pressed. The release cap 4 is a conductive cap member attached to the push button. The release spring 6 is a coil spring that urges the push button and can electrically connect the cap member.

Chassis 11 is screw fixed to the ground portion component of the power supply circuit of the main board (not shown), and has a ground potential most Underlying the camera body 1.

Therefore, in order to secure the ground potential was cheap boss, it is important that the member and the chassis 11 are connected with low contact resistance.

  In this figure, the zoom ground plate 10 fixed to the top base 8 abuts on the chassis end 11a with a constant contact pressure at one end 10a, and similarly at the other end 10b, the zoom fixing plate 9 Is in contact with the protruding portion 9a.

  The zoom fixing plate 9 is provided with a zoom spring 12 for urging the zoom lever 3 to the neutral position and a brush contact piece 13 for detecting the rotation angle of the zoom lever 3.

  Further, at a position facing the brush contact piece 13, there is a flexible substrate on which a release switch (not shown) and a land pattern for a zoom brush are arranged.

  The zoom fixing plate 9 and the zoom lever 3 are fixed by screws with the top base 8 interposed therebetween, and are held in a rotatable state.

  A release cap 4, a release button 2, and a release spring 6 are attached to the zoom lever 3. The release button 2 is disposed at the center of a zoom lever 3 that can be rotated or pressed.

  The release button 2 and the zoom lever 3 are locked in a state in which the release button 2 can move in the direction of pressing the button by a pusher portion that serves as a pair of hooks and a shaft, which will be described later. Has been.

  FIG. 3 is a top perspective view of the release button 2 in FIG.

  In FIG. 3, a recess 2h for receiving a tip 6a (see FIG. 6) of the release spring 6 is provided on a semicircular side next to the hole 2f for inserting the release spring 6. Further, notches 2a and 2b are provided at positions facing the release button 2.

  The two holes 2f and 2g are on the mold using the slide piece and are not related to the present invention.

  FIG. 4 is a rear perspective view of the release button 2 in FIG.

  In FIG. 4, there are a pair of hooks 2i, 2j beside the pusher-shaped boss 2e. The hooks 2 i and 2 j are hooks for locking to the zoom lever 3, and have a role of holding the release button 2 urged by the release spring 6 in a predetermined position.

  FIG. 5 is a rear perspective view of the release button 2 and the release cap 4 in FIG.

  As shown in FIG. 5, the release cap 4 has two protrusions 4a and 4b, and the release button 2 has the protrusions 4a and 4b of the release cap 4 beside the notches 2a and 2b. There are recesses 2c, 2d that can be locked when rotated.

  Normally, the release cap 4 and the release button 2 are often fixed by adhesion, but in this embodiment, a bayonet type is adopted.

  In order to reduce the contact resistance generated between the release cap 4 and the release spring 6, when the contact pressure is increased and the release cap 4 is fixed only by bonding, the release cap 4 is lifted before the adhesive is solidified. It can be considered.

  By fixing the release cap 4 and the release spring 6 to the bayonet type, it is possible to mechanically lock the release cap 4 and the appearance of the release cap 4 due to lifting.

  Next, the release spring 6 is passed through the back surface of the release button 2 around the boss 2e, and the tip is passed through the hole 2f provided in the release button 2 while rotating the entire pulling so that the tip of the spring is located on the opposite side. Attach to.

  As a result, when the release cap 4 is mounted, the release spring 6 is locked in a state of being sandwiched between the release button 2 and, therefore, it is possible to obtain a charging force at the tip portion thereof.

  FIG. 6 is a perspective view of the release spring 6 in FIG.

  In FIG. 6, a release cap side tip (one tip) 6 a of the release spring 6 has a gentle slope for charging between the release cap 4 and the release button 2, and is a normal coil. The slope is different from the spring part.

This is because one spring member has two functions for ground connection and release button urging, so it can be set to the optimum spring force without worrying about the contact resistance with the release cap 4. The operability can be improved.

  Further, the zoom lever side tip portion (the other tip portion) 6b of the release spring 6 has a hook shape, and can be inserted into a hole 3a provided in the zoom lever 3 to be described later for electrical conduction.

  FIG. 7 is a rear view of the zoom lever 3 in a state where the release button 2 and the release spring 6 in FIG. 2 are mounted.

  In FIG. 7, the center of the zoom lever 3 has a hole 3b through which the boss 2e of the release button 2 is inserted. In addition, this portion plays a role in positioning the release button 2 and preventing falling.

  The zoom lever 3 has bosses 3c and 3d for fixing the zoom lever 3 and the zoom fixing plate 9 with screws. The zoom lever 3 can be rotated in a rotatable state by fixing both of them while the top base 8 is inserted. The lever 3 is held on the zoom fixing plate 9.

  8 is a cross-sectional view taken along line CC in FIG. FIG. 8 is a view showing a state in which the release spring 6 is mounted on the zoom lever 3.

  In FIG. 8, the width of the hole 3 a of the zoom lever 3 is set to be narrower than the distal end portion 6 b of the release spring 6. By inserting the tip 6b of the release spring 6 into the hole 3a, the release spring 6 can be charged in a direction that is 90 degrees different from the direction in which the release spring 6 biases the release button 2.

  As a result, the release spring 6 and the zoom lever 3 can be electrically connected with reduced contact resistance, and the operability is sacrificed by changing the direction of the spring force from the biasing direction of the release button 2 by 90 degrees. It is possible to secure a reliable ground without having to.

  As described above, in the present embodiment, the release cap 4, the release spring 6, and the zoom lever 3 can be reliably connected. Further, since the spring shape for taking the ground and the spring portion for operating the release button are separated, a release button mechanism that does not sacrifice operability can be provided.

(Second Embodiment)
FIG. 9 is an exploded perspective view of an essential part of a second embodiment of a release button mechanism in the electronic still camera of FIG.

  As shown in FIG. 9, in the second embodiment, the shape of the tip of the release spring 16 connected to the release cap 4 is different from that of the first embodiment, and is in contact with the side surface portion of the release cap 4 and takes electrical conduction. It has become.

  The release button 22 has a notch 22a so that the distal end portion 16a of the release spring 16 can protrude from the upper surface to the side surface, and has a bayonet type release cap structure as in the first embodiment. The description is omitted because it is redundant.

  FIG. 10 is a perspective view of the release spring 16 in the release button mechanism of the second embodiment shown in FIG.

  As shown in FIG. 10, the release spring 16 in the second embodiment has a coil spring portion and a tip 16b on the zoom lever side, but the shape is the same as that described in the first embodiment. Are the same.

  Further, the release cap side distal end portion 16a of the release spring 6 is bent in a direction different from the urging direction of the release button 22 by 90 degrees.

  FIG. 11 is a cross-sectional view of the release button mechanism of the second embodiment shown in FIG.

  As shown in FIG. 11, the distal end portion 16 a of the release spring 16 has a structure that is charged inside when the release cap 4 is put on.

  Thereby, the release spring 16 distal end portion 16a can ensure electrical conduction with a strong pressure against the outer peripheral side surface and inner surface of the release cap 4.

  Also in the second embodiment, the bayonet-type release cap 4 is firmly fixed to the release button 2 and peels off or tilts even when a strong spring force generated by the pressure contact of the tip 16a of the release spring 16 is applied. Never do.

  Further, the pressing direction of the distal end portion 16a of the release spring 16 differs from the pressing direction of the release button 22 by 90 degrees, so there is no fear of adversely affecting the operational feeling of the release button 22.

  Thereby, also in the release button mechanism described in the second embodiment, the release cap 4, the release spring 16, and the zoom lever 3 can be reliably connected. Further, since the spring shape for grounding and the spring portion for button operation are separated, a release button mechanism that does not sacrifice operability can be provided.

1 is an external perspective view of an electronic still camera as an electronic apparatus according to an embodiment of the present invention. It is a disassembled perspective view of 1st Embodiment of the release button mechanism in the electronic still camera of FIG. FIG. 3 is a top perspective view of the release button 2 in FIG. 2. FIG. 3 is a rear perspective view of the release button 2 in FIG. 2. FIG. 3 is a rear perspective view of a release button 2 and a release cap 4 in FIG. 2. It is a perspective view of the release spring 6 in FIG. FIG. 3 is a rear view of the zoom lever 3 in a state in which the release button 2 and the release spring 6 in FIG. 2 are mounted. It is CC sectional view taken on the line of FIG. It is a principal part disassembled perspective view of 2nd Embodiment of the release button mechanism in the electronic still camera of FIG. FIG. 10 is a perspective view of a release spring 6 in the release button mechanism of the second embodiment in FIG. 9. It is sectional drawing of the release button mechanism of 2nd Embodiment of FIG. It is a disassembled perspective view of the conventional release button mechanism.

Explanation of symbols

1 Camera body 2 Release button 3 Zoom lever 4 Release cap 6 Release spring 8 Top base 9 Zoom fixing plate 10 Zoom ground plate 11 Chassis 12 Zoom spring 13 Brush section

Claims (3)

A push button,
A conductive cap member attached to the push button;
A coil spring that urges the push button and is electrically connected to the cap member;
One end of the coil spring is charged in a direction 90 degrees different from the direction in which the coil spring urges the push button, and the side surface of the cap member is pressed between the push button and the cap member. electronic devices characterized by Tei Rukoto sandwiched between. It said push the side surface from the upper surface of the button, the electronic device according to claim 1, wherein said Rukoto notches to protrude the tip is formed of the coil spring. The push button is arranged at the center of a ring member that can be rotated or pressed,
According to claim 1 or 2 electronic apparatus according the other tip portion of the coil spring in a direction different 90 ° from the direction in which the coil spring for urging the push button is characterized that you have been charged.

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