JP2010197789A - Electronic equipment and method for assembling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide electronic equipment that reliably discharges static electricity accumulated in a turnable operation member to a conductive surface of an enclosure case. <P>SOLUTION: The electronic equipment includes: a conductive torsion spring (energizing member) 17 that abuts on a conductive zoom lever (operation member) 10 turnably installed in a camera top-cover 6 and applies an energizing force when the zoom lever 10 is turned; a conductive screw 18 (fixing member) that is inserted into an end turn section of the torsion spring 17 and screwed in a through hole 11c; a conductive surface exposed by removing the surface treatment of the rear surface of the camera top-cover 6; and a conductive spring (elastic member) 19 disposed inside the through hole 11c so that its one end side abuts on the tip side of the screw 18 and the other end side is always in contact with the conductive surface of the camera top-cover 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic apparatus such as a digital still camera and an assembling method thereof.

  In digital still cameras, etc., in order to improve the appearance quality, etc., operation members (for example, zoom levers) that are rotatably installed on the exterior case are made of metal members or subjected to metal plating on the surface. ing. As described above, the operation member formed of the metal member or subjected to the metal plating process has conductivity. Moreover, although the exterior case is formed of a conductive member, the surface is subjected to alumite treatment and the surface is non-conductive.

  For this reason, even if static electricity charged on the fingertip or clothes of the operator (photographer) is accumulated in the operation member and discharged, it does not flow into the outer case, and the circuit board disposed near the operation member This may cause malfunction or damage to the circuit board.

  For this reason, as a countermeasure against static electricity of the operation member that is rotatably installed, a part of the surface is scraped off in the vicinity of the operation member of the outer case made of a conductive member having a non-conductive surface treatment. Conventionally, there has been known an electronic device that exposes the static electricity generated in the operation member to the exterior case from the conductive surface where the static electricity generated in the operation member is exposed (see, for example, Patent Document 1).

  In the invention of Patent Document 1, static electricity accumulated on the operation member (key top of the operation switch) is creeped between the conductive surface exposed on the surface of the exterior case (metal case whose surface is oxidized). And it is made to escape from this conduction surface to an exterior case (metal case). However, since the operation member and the conductive surface exposed on the surface of the exterior case are not in electrical contact, the static electricity accumulated on the operation member depends on the amount of static electricity accumulated on the operation member and the surrounding environmental conditions. It may not discharge reliably to the conductive surface exposed on the case surface.

  Accordingly, an object of the present invention is to provide an electronic device and an assembly method thereof that can reliably discharge static electricity accumulated in an operation member that is rotatably installed to a conductive surface of an exterior case. .

  In order to achieve the above object, the invention according to claim 1 is characterized in that a conductive exterior member conducted to the ground potential of the electronic circuit board, a non-conductive holding member, and the holding member are rotatable. An operating member having conductivity, a biasing member having conductivity for biasing the operating member so as to return to a predetermined initial position, and a conductivity for fixing the biasing member to the holding member. The holding member has a first surface facing the exterior member and a second surface facing the biasing member, and the first member is an electronic device including a fixing member. A through-hole for communicating the surface with the second surface, the insertion portion of the fixing member is inserted and fixed in the through-hole, and the biasing member is in contact with the contact surface of the fixing member. And is disposed between the corresponding contact surface and the second surface of the holding member, Inside the through holes, a conductive elastic member that applies pressure to the insertion portion of the outer member and the fixing member is characterized by being arranged.

  The invention described in claim 2 is characterized in that the fixing member is fixed to the through hole by screwing.

  The invention according to claim 3 is characterized in that the fixing member is a screw, and a screw thread is formed in a part of the through hole.

  The invention according to claim 4 is characterized in that the contact surface is formed on a head of the screw.

  The invention according to claim 5 is characterized in that the biasing member has a biasing force that presses the contact surface and the second surface.

  The invention described in claim 6 is characterized in that the biasing member is a torsion spring.

  According to a seventh aspect of the present invention, the torsion spring includes an end winding portion and an arm portion, the arm portion urges the operation member to return to a predetermined initial position, and the fixing member It is inserted in the end winding part of the torsion spring, and the end winding part has a biasing force that presses the contact surface and the second surface.

  The invention according to claim 8 is characterized in that the elastic member is a spring.

  According to the ninth aspect of the present invention, at least a part of the surface of the exterior member is subjected to non-conductive surface treatment, and a conductive portion that contacts the elastic member is the elastic portion of the surface of the exterior member. It is characterized by being able to conduct with a member.

  Invention of Claim 10 is an assembly method of the electronic device of Claims 1-9, Comprising: The elastic member arrangement | positioning process which arrange | positions the said elastic member in the said through-hole, The contact surface of the said fixing member, After the urging member arranging step of arranging the urging member between the second surface of the holding member, the elastic member arranging step and the urging member arranging step, the insertion portion of the fixing member is And an urging member fixing step of fixing the urging member between the contact surface of the fixing member and the second surface of the holding member.

  According to the electronic apparatus of the present invention, electrical continuity is always ensured between the operating member and the exterior member via the biasing member, the fixing member, and the elastic member. Therefore, when the operation member is touched with a fingertip or the like in which static electricity has accumulated, the static electricity can be reliably released from the operation member to the exterior member via the biasing member, the fixing member, and the elastic member. Thereby, even when the operation member is touched with a fingertip or the like in which static electricity is accumulated, it is possible to reliably prevent a problem that the static electricity is discharged to the electronic circuit board side in the electronic device.

  Further, according to the electronic device assembling method of the present invention, the insertion portion of the fixing member is inserted into the through hole in which the elastic member is disposed, and the contact surface of the fixing member and the second surface of the holding member are By fixing the biasing member therebetween, the biasing member can be easily fixed to the second surface side of the holding member.

1 is a perspective view showing a front side of a digital camera according to an embodiment of the present invention. Sectional drawing of the zoom lever vicinity of a digital camera. The top view which shows the inner side (back surface) vicinity of the zoom lever of a camera upper cover. The perspective view which shows the inner side (back surface) vicinity of the zoom lever of a camera upper cover. The disassembled perspective view which shows the attachment structure of a zoom lever. FIG. 3 is an exploded perspective view showing a conductive member between a zoom lever and a conductive surface of a camera upper cover. The top view which shows the inner side (back surface) of a camera upper cover.

  Hereinafter, the present invention will be described based on the illustrated embodiments. This embodiment is an example in which an electronic apparatus according to the present invention is applied to a digital still camera (hereinafter referred to as “digital camera”). FIG. 1 is a perspective view showing the front side of the digital camera according to the present embodiment.

  As shown in FIG. 1, on the front (front) side of the digital camera 1 according to the present embodiment, a lens barrel unit 3 having a photographing lens 2 that can be extended from a retracted storage position to a photographing position, a strobe light emitting unit 4 and the like. Is provided. In FIG. 1, when the power is turned off, the photographing lens 2 is in the retracted storage position in the lens barrel unit 3 and is protected by a lens barrier 5 that can be freely opened and closed. Further, on the upper surface side of the digital camera 1, a camera upper cover (exterior member) 6, a power button 7 for starting the entire digital camera 1, a mode switching dial 8 for setting various scene modes, still image modes, moving image modes, and the like. A release button 9 and a zoom lever (operation member) 10 are provided.

  The release button 9 is a pressing operation member that is pressed when the subject is photographed. The image data of the subject image received on the light receiving surface of an image sensor (not shown) such as a CCD through the photographing lens 2 by the pressing operation of the release button 9. Is recorded. The zoom lever 10 is a rotatable and slidable operation member for zooming the photographing lens 2 to the wide angle side or the telephoto side. When the zoom lever 10 is rotated inward (to the power button 7 side), the photographing lens 2 is moved. When the zoom lens 10 is zoomed to the wide-angle side and the zoom lever 10 is rotated outward (to the mode switching dial 8 side), the photographing lens 2 is zoomed to the telephoto side. Note that the release button 9 and the zoom lever 10 are electrically conductive by performing metal plating on the entire surface of the resin molded member.

  Next, the antistatic configuration of the zoom lever 10 that is a feature of the present invention will be described. 2 is a cross-sectional view of the vicinity of the zoom lever of the digital camera, FIG. 3 is a plan view showing the inside of the upper cover and the vicinity of the zoom lever, FIG. 4 is a perspective view thereof, and FIG. It is a disassembled perspective view shown.

  A mounting plate (holding member) 11 that is fixed to the camera body (not shown) together with the camera upper cover 6 is provided on the inner side (back surface) of the camera upper cover 6. Ribs 11b are formed on the periphery of the opening 11a formed on the cover 6 side. The rib 11b is fitted into the lever mounting opening 6a of the camera upper cover 6. The camera upper cover 6 and the mounting plate 11 are made of a conductive metal member (for example, aluminum) by anodizing the entire surface (except for a conductive surface 6b on the back surface of the camera upper cover 6 described later). .

  In addition to the conductive surface 6b, a part of the back surface of the camera upper cover 6 has a conductive portion (non-conductive) electrically connected to a ground potential (ground) of an electronic circuit board (such as an FPC 13 described later) in the camera. The camera upper cover 6 is electrically connected to the ground potential of the electronic circuit board via the conductive portion.

  The zoom lever 10 is installed on the lever mounting opening 6a so that the ring-shaped zoom lever upper portion 10a protrudes from the rib 11b, and the disc-shaped zoom lever lower portion 10b is slightly between the inner surface of the rib 11b. It is inserted with a gap. In addition, a slight gap is provided between the lower surface of the zoom lever upper portion 10a and the upper surface of the rib 11b. As described above, since the rib 11b of the mounting plate 11 is disposed between the zoom lever 10 (the zoom lever upper portion 10a and the zoom lever lower portion 10b) and the camera upper cover 6, the zoom lever 10 and the camera upper cover 6 are separated from each other. Non-contact.

  The rear surface of the zoom lever lower portion 10b is positioned on the lower surface side of the mounting plate 11 (on the side opposite to the camera upper cover 6), and a substantially disc-shaped pressing plate 12 that prevents the zoom lever 10 from coming off, and an FPC ( An electrical contact piece 14 slidably contacting the flexible substrate 13 is fixed by screws 15a and 15b. The upper surface (surface on the mounting plate 11 side) of the pressing plate 12 is slidably in contact with the mounting plate 11. In addition, the outer peripheral side surface of the pressing plate 12 and the mounting plate 11 are not in contact with each other. The electrical contact piece 14 is installed so as to press the FPC 13. Thereby, in a state where the zoom lever 10 is not operated, the electric contact piece 14 is urged toward the mounting plate 11 by the reaction force from the FPC 13 side.

  With such a configuration around the zoom lever 10, the zoom lever 10 disposed in non-contact with the upper surface and inner peripheral surface of the rib 11b of the mounting plate 11 is rotatably held in the rib 11b.

  A release button 9 is installed in the inner recess of the zoom lever upper part 10a via a spring member 16, and the release shaft 9a of the release button 9 slides in the shaft holes 10c and 12a of the zoom lever 10 and the holding plate 12. It is inserted as possible. The release button 9 is urged by the spring member 16 in the direction opposite to the pressing operation direction. The zoom lever 10 rotates around the shaft hole 10c. A release prevention projection 9b for preventing the release button 9 is provided on the back side of the release button 9.

  Further, a projection piece 10d is formed integrally with the zoom lever lower portion 10b, and a pair of arm portions 17a side of a torsion spring (biasing member) 17 is engaged with both sides of the projection piece 10d. The torsion spring 17 generates an actuating force amount (biasing force) when rotating the zoom lever 10 (zooming operation) and also generates an urging force for returning to the initial position.

  As shown in FIGS. 2 and 5, a through hole 11 c is formed so as to communicate between the upper surface (first surface) and the lower surface (second surface) of the mounting plate 11. The end winding portion 17b of the torsion spring 17 is fixed by a screw (fixing member) 18 around the lower surface side through hole 11c. Next, a method for fixing the torsion spring 17 will be described with reference to FIG.

  First, a spring (elastic member) 19 is slidably disposed in the through hole 11c. Then, a contact surface on the tip end side of the screw 18 and an end winding portion 17b of the torsion spring 17 are arranged on the lower surface side of the mounting plate 11 of the through hole 11c, and a screw portion on the tip end side of the screw 18 is disposed on the end winding portion 17b. (Insert part) is inserted, and further, the screw part of the screw 18 is inserted into the through hole 11c and screwed into a thread formed in a part of the through hole 11c. Accordingly, the end winding portion 17b of the torsion spring 17 is disposed between the contact surface 18a of the head of the screw 18 and the lower surface of the mounting plate 11 so as to be positioned around the lower surface side of the mounting plate 11 of the through hole 11c. Arranged to be fixed.

  At this time, the tip end side of the screw 18 screwed into the through hole 11 c is pressed against one end side of the spring 19, and the other end side of the spring 19 is pressed against the back surface of the camera upper cover 6. As shown in FIG. 7, a part of the anodized surface is peeled off by laser processing or the like on the back surface of the camera upper cover 6 to which the other end of the spring 19 is in pressure contact, and the conductive surface 6b is exposed.

  Thus, the other end side of the spring 19 is always in contact with the conducting surface 6 b of the camera upper cover 6 by the urging force of the spring 19. The torsion spring 17, the screw 18 and the spring 19 provided between the projection piece 10d of the zoom lever 10 and the conductive surface 6b of the camera upper cover 6 are formed of a conductive metal member (conductive member). Accordingly, the zoom lever 10 is always electrically connected to the conductive surface 6b on the back surface of the camera upper cover 6 via the torsion spring 17, the screw 18 and the spring 19 even when the zoom lever 10 is zoomed (rotated and slid). Is in contact with

  Further, according to the fixing method of the torsion spring 17 described above, the screw 18 inserted into the end winding portion 17b of the torsion spring 17 is inserted into the through hole 11c in which the spring 19 is disposed and screwed together, thereby torsion spring. 17 can be easily fixed to the lower surface side of the mounting plate 11. Further, the spring 19 in contact with the tip end side of the screw 18 can be reliably brought into contact with the conductive surface 6 b on the back surface of the camera upper cover 6.

  The zoom lever 10 of the digital camera 1 according to the present embodiment is mounted as described above, and when the power button 7 is turned on, the photographer moves the operation protrusion 10e of the zoom lever 10 to the wide-angle zoom direction side or the telephoto zoom direction side. By operating, the zoom lever 10 is rotated. At this time, a predetermined operating force amount (biasing force) is applied by the torsion spring 17 engaged with the protruding piece 10d. When the photographer releases the fingertip from the operation projection 10e, the zoom lever 10 is rotated to the initial position by the urging force of the torsion spring 17, and self-resets.

  Thus, even when the zoom lever 10 is zoomed, the zoom lever 10 is always electrically connected to the conductive surface 6b on the back surface of the camera upper cover 6 via the torsion spring 17, the screw 18, and the spring 19. Continuity is ensured. Therefore, when the zoom lever 10 is operated to zoom, when the vicinity of the operation projection 10e of the zoom lever 10 is touched with a fingertip or the like in which static electricity has accumulated, the static electricity is applied to the zoom lever 10 (operation projection 10e, zoom lever upper portion 10a, The zoom lever lower part 10 b, the protruding piece 10 d), the torsion spring 17, the screw 18, and the spring 19 can be reliably released to the conduction surface 6 b of the camera upper cover 6.

  Thereby, even when the operation protrusion 10e of the zoom lever 10 is touched with a fingertip or the like in which static electricity has accumulated, it is possible to reliably prevent a problem that static electricity is discharged to the FPC 13 side.

  Further, in the present embodiment, the torsion spring 17 that applies an amount of actuation force (biasing force) to the zoom lever 10 during the zoom operation (rotary sliding operation) of the zoom lever 10 is used to discharge static electricity to the conduction surface 6 b of the camera upper cover 6. By using it as a member to escape, it is only necessary to newly provide a screw 18 and a spring 19 to be inserted into the through hole 11c between the torsion spring 17 and the conducting surface 6b of the camera upper cover 6 as a countermeasure against static electricity of the zoom lever 10. is there. As a result, it is possible to prevent a significant cost increase associated with countermeasures against static electricity of the zoom lever 10, and it is possible to prevent a decrease in assemblability.

  Even when the photographer presses the release button 9, a part of the fingertip of the photographer contacts the zoom lever upper portion 10 a of the zoom lever 10 positioned around the release button 9. Therefore, when the release button 9 is pressed with a fingertip or the like that has accumulated static electricity, the static electricity is applied to the zoom lever 10 (zoom lever upper portion 10a, zoom lever lower portion 10b, projection piece 10d), torsion. The spring 17, the screw 18, and the spring 19 can be reliably released to the conductive surface 6 b of the camera upper cover 6.

  In the embodiment described above, the present invention is applied to a digital camera having a zoom lever (operation member) that can freely rotate as an electronic device. However, the present invention is not limited thereto, and the digital camera is slidably installed in an exterior case. The present invention can be similarly applied to other electronic devices including the conducted operation member.

1 Digital camera (electronic equipment)
3 Lens barrel unit 6 Camera upper cover (exterior member)
6b Conducting surface 8 Mode switching dial 9 Release button 10 Zoom lever (operation member)
10a Zoom lever upper part 10b Zoom lever lower part 10c Shaft hole 10d Projection piece 10e Operation projection part 11 Mounting plate (holding member)
11a Opening 11b Rib 11c Through-hole 12 Holding plate 14 Electrical contact 17 Torsion spring (biasing member)
18 Screw (fixing member)
19 Spring (elastic member)

JP 2000-323295 A

Claims (10)

A conductive exterior member conducted to the ground potential of the electronic circuit board, a non-conductive holding member, a conductive operation member rotatably provided on the holding member, and the operation member An electronic device comprising: an urging member having conductivity for urging so as to return to the initial position; and a fixing member having conductivity for fixing the urging member to the holding member,
The holding member has a first surface that faces the exterior member and a second surface that faces the biasing member, and a through hole that allows the first surface and the second surface to communicate with each other. Have
The insertion portion of the fixing member is inserted and fixed in the through hole, the urging member contacts the contact surface of the fixing member, and the contact surface and the second surface of the holding member Placed between
An electronic apparatus, wherein a conductive elastic member that presses the exterior member and the insertion portion of the fixing member is disposed inside the through hole.   The electronic device according to claim 1, wherein the fixing member is fixed to the through hole by screwing.   The electronic device according to claim 1, wherein the fixing member is a screw, and a screw thread is formed in a part of the through hole.   The electronic device according to claim 3, wherein the contact surface is formed on a head portion of the screw.   The electronic device according to claim 1, wherein the biasing member has a biasing force that presses the contact surface and the second surface.   The electronic device according to claim 1, wherein the biasing member is a torsion spring.   The torsion spring has an end winding portion and an arm portion, the arm portion urges the operation member to return to a predetermined initial position, and the fixing member is inserted into the end winding portion of the torsion spring. The electronic device according to claim 6, wherein the end winding portion has a biasing force that presses the contact surface and the second surface.   The electronic apparatus according to claim 1, wherein the elastic member is a spring.   At least a part of the surface of the exterior member is subjected to non-conductive surface treatment, and a conductive portion that contacts the elastic member of the surface of the exterior member can be electrically connected to the elastic member. The electronic device according to any one of 1 to 8. An electronic device assembling method according to claim 1,
An elastic member disposing step of disposing the elastic member in the through hole;
An urging member disposing step of disposing the urging member between the contact surface of the fixing member and the second surface of the holding member;
After the elastic member arranging step and the biasing member arranging step, the insertion portion of the fixing member is inserted into the through hole, and between the contact surface of the fixing member and the second surface of the holding member An urging member fixing step of fixing the urging member.

Images