JP5252983B2 - Electronics - Google Patents

Description

    The present invention relates to an electronic device having a plated resin member, and more particularly to an electronic device having an electrostatic countermeasure structure.

    An exterior member of an electronic device such as a digital camera, such as an operation member, is often molded from a resin in consideration of operability. Moreover, in order to add a design characteristic, what performed the surface treatment of the operation member by plating is preferable. Since the plated operation member becomes a conductive member, static electricity applied to the plated operation member is easily discharged into the apparatus.

    In addition, when a path through which static electricity passes is not formed in the application section or in the vicinity thereof, the static electricity is discharged to the nearest location with low impedance. For this reason, static electricity applied to the plated operation member may eventually cause secondary discharge to the printed wiring board with low impedance. Therefore, if countermeasures against static electricity are not taken, an electric circuit may malfunction. In the worst case, the electric circuit may be destroyed.

Therefore, Patent Document 1 proposes a structure in which the entire surface of a resin operation member is plated with a conductive material, a part thereof is brought into contact with the ground pattern of the substrate, and static electricity is dropped to the ground.
JP 2003-109792 A

    However, the structure disclosed in Patent Document 1 cannot be said to be a structure in which contact pressure is always reapplied in view of the creep performance of the resin. For this reason, the electrical contact between the plated resin member and the printed wiring board is not reliable, and there is a possibility that the impedance cannot be kept sufficiently low.

    As another static electricity countermeasure method, there is a configuration in which an insulating sheet is provided between each operation unit of a digital camera and a printed wiring board. According to this configuration, it is possible to prevent static electricity of each operation unit from flying to a printed wiring board having a low impedance. However, when an insulating sheet is provided, there are problems that the number of parts increases and the required space also increases.

    Therefore, the present invention provides an electronic device that can reliably release static electricity and reliably avoid malfunction and destruction of a circuit.

To solve the above problems, an electronic apparatus according to one aspect of the present invention, an operating member slidable operation, a plating process is performed, with the arm portion for biasing said operating member by the elastic deformation a resin member energizing unit Ru is formed an elongated hole through holes are formed, an electronic device having a printed circuit board ground pattern surrounding the periphery of the elongated hole through hole, said urging portion, A hemispherical contact portion that contacts the edge of the elongated hole through hole is formed, and the contact portion abuts against the edge of the elongated hole through hole by a reaction force when the urging portion urges the operation member. The operation member is formed with an urging inclined surface that is urged by the urging portion .

  Other objects and features of the present invention are illustrated in the following examples.

    ADVANTAGE OF THE INVENTION According to this invention, the electronic device which can avoid the malfunctioning and destruction of a circuit reliably can be provided.

    Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same members are denoted by the same reference numerals, and redundant description is omitted.

  First, a basic configuration of a digital camera that is an example of an electronic apparatus embodying the present invention will be described.

    FIG. 1 is a rear perspective view of the digital camera in the present embodiment.

    In FIG. 1, reference numeral 10 denotes a digital camera. As will be described later, the digital camera 10 has a static electricity countermeasure structure of a plated resin member.

    Reference numeral 6 denotes a display unit. The display unit 6 is provided on the back surface of the digital camera 10 and displays a captured image. The display unit 6 is rotatably attached by a hinge 7 that is movable with respect to two axes of the X axis and the Y axis shown in the coordinate system 11 of the digital camera 10. With such a configuration, when the digital camera 10 is not used, the display unit 6 can be protected by directing the display unit 6 side toward the cover 9.

    Reference numeral 3 denotes an operation unit. The operation unit 3 has a circular shape and is arranged beside the display unit 6. In the center of the operation unit 3, another independent operation unit 5 (operation button) is arranged. Further, operation units 2 and 4 (operation buttons) are arranged around the circular operation unit 3, and functions necessary for the operation of the digital camera 10 are assigned.

    Reference numeral 1 denotes an operation lever configured to be slidable up and down. The operation lever 1 is provided at the upper left of the operation unit 2 in FIG. The operation lever 1 is assigned with a shooting / playback mode switching function of the digital camera 10.

    Reference numeral 8 denotes a viewfinder eyepiece. The viewfinder eyepiece 8 is disposed on the display unit 6. Since the finder eyepiece 8 is provided, photographing can be performed even when the display unit 6 is closed.

    Reference numeral 12 denotes a rotary dial. The rotary dial 12 is disposed on the upper surface of the digital camera 10. The rotary dial 12 is assigned functions for setting various modes at the time of shooting.

Reference numeral 13 denotes a zoom lever. A release button (not shown) is arranged at the center of the zoom lever 13 so that photographing can be performed at an angle of view desired by the photographer.
Example 1
Next, an electrostatic countermeasure structure for a digital camera in Embodiment 1 of the present invention will be described.

  FIG. 2 is an internal structure diagram of the digital camera according to the first embodiment. In FIG. 2, only the part relevant to the electrostatic countermeasure structure in a present Example is shown, and the other part is abbreviate | omitted.

    As shown in FIG. 2, the digital camera 10 is provided with a circular operation unit 3 and operation units 2, 4, 5 (operation buttons). The operation units 2, 4, and 5 are integrally formed of resin and are configured as one resin member. In addition, a plating process is performed on the resins of the operation units 2, 4, and 5.

    Reference numeral 14 denotes an urging unit. The urging unit 14 is provided to urge the operation lever 1. The urging portion 14 that urges the operation lever 1 is integrated with the operation portions 2, 4, and 5 via the arm portion 15 in order to give elastic force to urge the operation lever 1. The urging portion 14 is elastically deformed by deforming the arm portion 15 and urges the operation lever 1. In this embodiment, the operation lever 1 is a structural member that is biased by the biasing portion 14.

    The urging unit 14 and the arm unit 15 are plated together with the operation units 2, 4, and 5. Thus, the operation parts 2, 4, and 5, the urging | biasing part 14, and the arm part 15 comprise the resin member to which the plating process was performed.

    A printed wiring board 21 is attached to the digital camera body. A plurality of tact switches 20 are mounted on the printed wiring board 21 in accordance with the number of operation units 2, 3, 4, and 5. The tact switch 20 generates a pulse when the operation units 2, 3, 4, and 5 are pressed.

    A slide switch 29 is mounted on the printed wiring board 21 below the operation lever 1. The slide switch 29 is positioned below the operation lever 1 when viewed in a direction perpendicular to the plane of the printed wiring board 21.

    The slide switch 29 is provided with a knob portion 19. The knob portion 19 of the slide switch 29 and a part of the operation lever 1 are engaged with each other, and the slide switch 29 can be switched by a vertical slide operation of the operation lever 1. The operation lever 1 is, for example, a mode switch used for switching the mode of the digital camera. For this reason, the mode of the digital camera is switched according to the up / down sliding operation of the operation lever 1. The operation lever 1 is also molded from resin and plated.

    A ground pattern 17 (ground pattern) is formed on the printed wiring board 21. One end of the ground pattern 17 surrounds the periphery of the fastening hole 16. The printed wiring board 21 is fixed to the digital camera body by inserting a screw (not shown) into the fastening hole 16. At this time, the ground pattern 17 is electrically connected to the metal part of the digital camera body through a screw. On the other hand, the other end of the ground pattern 17 surrounds the long hole through hole 27. As will be described later, the contact portion 18 provided in the urging portion 14 contacts the elongated hole through hole 27.

    FIG. 3 is a configuration diagram of a resin member in the digital camera of the first embodiment. FIG. 3 shows a state viewed from the opposite direction of FIG.

    A knob engaging groove 25 with which the knob portion 19 of the slide switch 29 is engaged is provided on the inner surface side (the printed wiring board 21 side) of the operation lever 1. A click groove 24 is provided on the inner surface of the operation lever 1 on the opposite side of the knob engaging groove 25. When the operation lever 1 slides, the arm portion 15 is elastically deformed, and the urging portion 14 falls into the click groove 24, so that a click feeling is given.

    The urging portion 14 is provided with a contact portion 18 on the side facing the printed wiring board 21. The contact portion 18 is a hemispherical (spherical R shape) convex portion. By making the contact portion 18 into a spherical R shape, a sufficient contact pressure can be ensured with respect to the ground pattern 17 provided on the printed wiring board 21 without depending on the urging direction of the contact portion 18. To make electrical contact.

    As shown in FIG. 3, the urging portion 14, the arm portion 15, and the operation portions 2, 4, and 5 constituting the resin member are integrally formed and plated. The spherical R-shaped contact portion 18 is also plated. Thus, the resin member is integrated by having a connection part that connects the plurality of operation parts 2, 4, and 5. For this reason, it is possible to reliably release the static electricity applied to any operation unit to the ground with a small number of parts without depending on the location of the other operation unit plated.

    A positioning hole 23 is provided in the resin member including the integrated biasing portion 14, arm portion 15, and operation portions 2, 4, and 5. The resin member is bonded and fixed to the cover 9 by inserting a positioning pin (not shown) provided in the cover 9 into the positioning hole 23.

    The operation unit 4 is provided with a pusher 22. The push part 22 is configured to push the tact switch 20 when the operation part 4 is pushed. The operation units 2 and 4 are operation buttons for calling a setting item that is most easily touched by the user, or operation buttons for switching the display unit 6.

    FIG. 4 is a cross-sectional view of a main part of the digital camera according to the first embodiment. FIG. 4 shows the structure of the printed wiring board 21, the resin member urging portion 14, and the operation lever 1.

    The operation lever 1 is formed with an urging inclined surface 28 that is urged so that the degree of the operation force becomes an appropriate magnitude. The urging unit 14 receives a reaction force in the acting direction 26 perpendicular to the urging inclined surface 28. The contact portion 18 provided in the urging portion 14 can reliably contact the ground pattern 17 formed on the printed wiring board 21 by this reaction force.

    In the printed wiring board 21 of this embodiment, a long hole through hole 27 is formed at a position corresponding to the contact portion 18 provided in the urging portion 14. The periphery of the elongated hole through hole 27 is surrounded by the ground pattern 17. The contact pressure can be increased by the contact of the spherical R-shaped contact portion 18 and the edge of the elongated hole through hole 27.

As described above, according to the configuration of the present embodiment, static electricity applied to the operation lever 1 or each operation unit flows to the ground pattern 17 on the printed wiring board 21 through the contact portion 18 of the resin member. Therefore, it is possible to reliably avoid malfunction or destruction of the circuit in the digital camera.
(Example 2)
Next, an electrostatic countermeasure structure for a digital camera will be described as an electrostatic countermeasure structure for an electronic apparatus according to a second embodiment of the present invention.

    FIG. 5 is an internal structure diagram of the digital camera according to the second embodiment. In FIG. 5, only the part relevant to the electrostatic countermeasure structure in the present embodiment is shown, and the other parts are omitted.

    In this embodiment, the structural member biased by the biasing portion 14 a is the display portion 6. The display unit 6 is configured to be opened / closed and rotated by a hinge 7. In the closed state, the display unit 6 is urged by the urging unit 14a with the elastic force of the arm portion 15a. The display unit 6 is generally an LCD unit. The urging unit 14 a is a hook that urges the display unit 6.

    The urging portion 14a, the arm portion 15a, and the operation portion 4 constituting the resin member are integrally molded. The resin member is plated. The printed wiring board 21a has a fastening hole 16a for fastening to the digital camera body using screws. Around the fastening hole 16a, one end of the ground pattern 17a is disposed so as to surround the fastening hole 16a.

    FIG. 6 is a cross-sectional view taken along VI-VI in FIG.

    An inclined surface 38 a is provided on the side surface of the display unit 6. The inclined surface 38a of the display unit 6 has the same or similar inclination angle as that of the urging inclined surface 28a so as to be urged by the urging inclined surface 28a provided in the urging portion 14a.

    A force acts on the urging portion 14a in the direction 32 of action perpendicular to the urging inclined surface 28a as a reaction force of the force that urges the display portion 6. This reaction force acts in the same way in the equivalent action direction 33 parallel to the action direction 32 on the static electricity countermeasure contact part 31 that is integrally molded via the arm part 15. The static electricity countermeasure contact part 31 is provided with a spherical R-shaped contact part 18a. The spherical R-shaped contact portion 18 is in contact with the printed wiring board 21a and is in contact with the ground pattern 17a formed on the printed wiring board 21a.

    The urging unit 14a repeats the displacement by the opening / closing operation of the urging display unit 6. For this reason, it is hard to receive the fall of the contact pressure by creep, and an electrical contact is ensured. Therefore, the path through which static electricity is discharged can be the ground pattern 17 on the printed wiring board 21.

    The urging unit 14a and the operation unit 4 are plated and exposed to the outside of the digital camera. For this reason, static electricity is easily applied to the urging unit 14 a and the operation unit 4. However, according to the present embodiment, this static electricity can be reliably discharged to the ground pattern 17a on the printed wiring board 21a via the contact portion 18a. Therefore, it is possible to protect the digital camera from malfunctions and circuit destruction caused by static electricity being applied to the display unit 6, that is, the liquid crystal panel, which is the nearest low impedance part.

    According to the above embodiment, the contact pressure is increased by the urging force generated by the deformation of the arm portions 15 and 15a constituting the elastic portion, and the urging portions 14 and 14a are urged structural members (the operation lever 1 and the display). Repeat the displacement for part 6). For this reason, it can prevent that the contact pressure by creep falls, and the electrical contact with the contact parts 18 and 18a and the grounding patterns 17 and 17a becomes reliable. Therefore, the applied static electricity can be surely discharged by using the grounding patterns 17 and 17a of the printed wiring boards 21 and 21a as paths through which the static electricity is discharged.

  The contents of the present invention have been described based on the specific embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

It is a back perspective view of the digital camera in a present Example. 1 is an internal structure diagram of a digital camera in Embodiment 1. FIG. 2 is a configuration diagram of a resin member in the digital camera of Embodiment 1. FIG. 1 is a cross-sectional view of a main part of a digital camera according to Embodiment 1. 6 is an internal structure diagram of a digital camera in Embodiment 2. FIG. It is sectional drawing cut | disconnected by VI-VI in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Operation lever 2, 3, 4, 5 Operation part 6 Display part 7 Hinge 8 Finder eyepiece part 9 Cover 10 Digital camera 11 Digital camera coordinate system 12 Rotation dial 13 Zoom lever 14, 14a Energizing part 15, 15a Arm part 16, 16a Fastening holes 17, 17a Grounding patterns 18, 18a Contact part 19 Knob part 20 Tact switch 21, 21a Printed wiring board 22 Push part 23 Positioning hole 24 Click groove 25 Knob engagement groove 26, 32, 33 Action direction 27 Long Hole through hole 28, 28a Biasing inclined surface 29 Slide switch 31 Electrostatic countermeasure contact part

Claims (1)

An operation member capable of sliding operation;
Plating processing is applied, and the resin member biasing section Ru is formed that urges the operating member by the arm portion is elastically deformed,
Long hole through holes are formed, an electronic device having a printed circuit board ground pattern surrounding the periphery of the elongated hole through hole,
The urging portion is formed with a hemispherical contact portion that comes into contact with the edge of the elongated hole through hole,
The operation member is urged by the urging portion so that the contact portion abuts against an edge of the elongated hole through hole by a reaction force when the urging portion urges the operation member. An electronic device characterized in that an inclined surface is formed .