JP2013045504A - Switch structure and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that a button falls off or a board mounting the button may be damaged when a strong load is applied to the button.SOLUTION: The switch structure has a button, a board on the surface of which the button is mounted, and a rear surface plate located on the rear side of the board, and having a receiving place that comes into contact with a portion of the rear side of the board when the button is depressed. Since a load is distributed to the rear surface plate, deflection occurring in a circuit board can be suppressed even if the button is pushed.

Description

  The present invention relates to a switch structure and a display device. More specifically, the present invention relates to a switch structure capable of efficiently distributing a load applied to the switch, and a display device having the switch structure.

  In recent years, display devices have become more multifunctional. Many switches are formed in a multifunctional display device. In particular, the number of products in which switches for optical disk drives are formed in display devices has increased rapidly in recent years.

  Conventionally, the structure described in Patent Document 1 is known as a mechanism including an eject button of an optical disk drive.

JP 2006-99865 A

  The eject button arranged as in the above-described prior art is subjected to various loads by the user.

  When a heavy load is applied to the eject button, there is a problem that the button may fall off or the base on which the button is mounted may be damaged.

  The present invention aims to solve the above problems.

  In order to solve the conventional problems, the switch structure or the display device according to the present invention is provided with a button, a base on which the button is mounted, a back surface of the base, and the button is pressed. And a back plate having a receiving portion in contact with a part of the back surface of the substrate.

  According to the switch structure or the display device of the present invention, since the load is distributed to the back plate, even if the switch button is pressed, the deflection generated in the circuit board can be suppressed.

1 is a diagram illustrating an appearance of a video display device according to a first embodiment. FIG. 3 is a top view of the video display apparatus according to the first embodiment. The enlarged view of the switch button concerning Embodiment 1. AA sectional view of the pedestal in FIG. 3 according to the first embodiment. BB sectional view of the pedestal in FIG. 3 according to the first embodiment Top view of circuit board according to the first exemplary embodiment. The bottom view of the circuit board concerning Embodiment 1

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to FIG.
(Device configuration)
(Explanation using figures, explanation of constituent elements (elements with symbols) individually in short sentences.)
FIG. 1 is a diagram showing an external appearance of a video display device. The video display device 100 includes a display 101 that outputs video. The display 101 employs a liquid crystal display in the present embodiment, but a plasma display panel or the like can be used as appropriate. In addition, the video display device 100 is provided with a pedestal 102 that supports the display 101. The pedestal 102 is equipped with an optical disk drive 103 that outputs a video signal recorded on the optical disk to the display 101. An optical disc (not shown) is inserted into the optical disc drive 103 from the front direction, and the content recorded on the optical disc is displayed on the display 101.

  FIG. 2 is a top view of the video display device. The pedestal 102 is provided with a switch button 201 for taking out the optical disk from the optical disk drive 103. The pedestal 102 is provided with a stand cover 202.

  Hereinafter, the pedestal 102 and the switch button 201 will be described in detail with reference to FIGS.

  FIG. 3 is an enlarged view of the switch button. In FIG. 3, a cross section is taken at the position AA and the position BB. Hereinafter, description will be made based on the sectional view.

  4 is a cross-sectional view of the pedestal in FIG. As shown in FIG. 4, a switch button 201, a stand cover 202, a switch element 401, a circuit board 402, and a back plate 403 are present inside the pedestal 102. The structure shown in FIG. The switch structure 400 in this embodiment includes at least a switch button 201, a circuit board 402, and a back plate 403. Each component will be described below.

  The switch button 201 is fixed to the stand cover 202 by claw fitting. Here, the claw fitting is a structure in which a rib shape is provided on the stand cover 202, and a convex shape is received from the tip of the rib in the pressing direction of the switch button 201 so as to hold the outer periphery of the switch button 201. is there. In this way, the switch button 201 is formed so as not to drop off from the stand cover 202. A circuit board 402 is attached to the switch button 201 by claw fitting. Similarly, the claw fitting has a structure in which the rib shape formed on the switch button 201 holds the outer periphery of the circuit board 402. In this way, the circuit board 402 is prevented from falling off the switch button 201. In this embodiment, the circuit board 402 is configured to be nail-fitted to the switch button 201. However, a rib may be separately formed on the stand cover 202 to prevent the circuit board 402 from falling off by the nail fitting.

  A switch element 401 is attached to the circuit board 402. The switch element 401 is close to or in contact with the switch button 201.

  The stand cover 202 and the back plate 403 are fastened with screws.

  A receiving portion 404 is formed on the back plate 403 by drawing. A support portion that is a part of the back plate 403 other than the receiving portion 404 is in contact with a placement surface (not shown). The receiving portion 404 is formed on the circuit board 402 side from the support portion. Note that the potential of the back plate 403 is formed to be equal to the ground potential of the power source of the video display device 100.

  The back surface of the circuit board 402 and the receiving portion 404 are close to each other. In the present embodiment, the distance between the back surface of the circuit board 402 and the receiving portion 404 is 0.2 mm. In this embodiment, the switch button 201 is mounted on the upper part of the position of the circuit board 402 with which the receiving portion 404 comes into contact.

  FIG. 5 shows a BB cross-sectional view of the pedestal 102 taken in FIG. As can be seen from this figure, the back surface of the circuit board 402 and the receiving portion 404 are close to each other. In the present embodiment, the distance between the back surface of the circuit board 402 and the receiving portion 404 is 0.2 mm.

  Hereinafter, the circuit board 402 will be described in detail with reference to FIGS. 6 and 7.

  FIG. 6 is a top view of the circuit board according to the first embodiment.

  As shown in FIG. 6, a switch element 401 and a ground contact 601 are formed on the upper surface of the circuit board 402. The switch element 401 is a push switch, and the signal path on the circuit board 402 changes when pressed. The ground contact 601 is a solder ball, and has a reference potential of another electronic circuit (not shown) formed on the switch element 401 or the circuit board 402.

FIG. 7 is a bottom view of the circuit board according to the first embodiment. A ground contact 701 is formed on the back surface of the circuit board 402. Similarly to the ground contact 601, the ground contact 701 is a solder ball, and is electrically connected to the ground contact 601, and is a reference potential of another electronic circuit (not shown) formed on the switch element 401 or the circuit board 402. Have Here, the ground contact 701 is disposed above the receiving portion 404.
(Function and effect of equipment)
Hereinafter, an operation when the user of the video display apparatus 100 presses the switch button 201 will be described with reference to FIG.

  First, the switch structure 400 is positioned on the back side of the circuit board 402 on which the switch button 201 is mounted, and a part of the back side of the circuit board 402 when the switch button 201 is pressed. The effect obtained by having the back surface plate 403 which has a receiving part which contacts with will be demonstrated. When the user of the video display device 100 presses the switch button 201, a load is applied in the vertical lower direction. The load applied to the switch button 201 is transmitted to the circuit board 402 via the switch element 401. The circuit board 402 is slightly bent downward by the load. When the circuit board 402 is curved, the back surface of the circuit board 402 comes into contact with the receiving portion 404. When the back surface of the circuit board 402 comes into contact with the receiving portion 404, the load applied to the circuit board 402 is distributed to the back plate 403. As described above, since the load is distributed to the back plate 403, even when the switch button 201 is pressed, the deflection generated in the circuit board 402 can be suppressed.

  The switch structure 400 may further include a receiving portion 404 formed on the circuit board 402 side from the support portion. In this way, the vertical arrangement of the circuit board 402 can be freely configured.

  Further, the switch structure 400 may be configured such that the receiving portion 404 and the support portion are formed on the back plate 403 by drawing the back plate 403. In this way, the strength of the receiving portion 404 can be increased, and even when the switch button 201 is pressed with a strong force, the back plate 403 or the circuit board 402 can be prevented from being destroyed.

  Further, the switch structure 400 may be configured such that the switch button 201 is mounted on the upper portion of the position of the circuit board 402 with which the receiving portion 404 contacts. As a result, the load applied to the switch button 201 is transmitted vertically to the receiving portion 404 via the circuit board 402. Therefore, the deflection of the circuit board 402 can be minimized.

  In the switch structure 400, the switch button 201 may be fitted and fixed to the stand cover 202. In this way, the switch button 201 and the stand cover 202 can be fixed without using fastening means such as screws. Further, in the present embodiment, the load applied to the switch button 201 is distributed to the back plate 403. Therefore, even if the switch button 201 is formed with a fitting structure, it is possible to prevent the switch button 201 from falling off.

  In the switch structure 400, the circuit board 402 may be fitted and fixed to the switch button 201 or the stand cover 202. In this way, the circuit board 402 can be fixed without using fastening means such as screws. Further, in the present embodiment, the load applied to the circuit board 402 is distributed to the back plate 403. Therefore, even if the circuit board 402 is formed with a fitting structure, it is possible to prevent the circuit board 402 from dropping off.

  Further, in the switch structure 400, the potential of the back plate 403 is formed to be equal to the ground potential of the power source of the video display device 100, and the ground contact 701 is disposed in contact with or close to the upper side of the receiving portion 404. You may form so that. If it does in this way, the bad influence by static electricity can be controlled. That is, when the user of the video display device 100 brings the fingertip close to the pedestal 102, there is a possibility that static electricity is generated from the fingertip. However, in the present embodiment, the generated static electricity falls to the ground contact 701 through the circuit board 402. In this way, since the generated static electricity falls to the ground terminal, it is possible to prevent the static electricity from being transmitted to a location outside the design and malfunctioning of the device. If the ground contact 601 is also formed on the upper surface of the circuit board 402 as in the present embodiment, there is a possibility that the ground contact can be formed at a location closer to the fingertip. It can be dropped to the ground terminal via 701.

  In the switch structure 400, the ground contact 701 may be the same as the reference potential of the switch element 401. In this way, the pattern arrangement of the circuit board 402 can be simplified.

The switch structure of the present invention is useful as a switch structure for an image display device.

DESCRIPTION OF SYMBOLS 100 Image display apparatus 101 Display 102 Pedestal 103 Optical disk drive 201 Switch button 202 Stand cover 400 Switch structure 401 Switch element 402 Circuit board 403 Back plate 404 Receiving location 601 Ground contact 701 Ground contact

Claims (8)

Button,
A base on which the button is mounted on the surface;
A back plate that is located on the back side of the base and has a receiving portion that contacts a part of the back of the base when the button is pressed;
Having a switch structure. The back plate has a support portion that is in contact with or supported by another structure, and the receiving portion,
The receiving part is formed on the base side from the support part,
The switch structure according to claim 1. The receiving part and the support part are formed by drawing the back plate,
The switch structure according to claim 2. The button is mounted on the upper portion of the base where the receiving portion contacts,
The switch structure according to claim 1. The button has a key top and a switch that is pressed in conjunction with the pressing of the key top,
A cover is arranged around the key top,
The key top is fitted and fixed to the cover,
The switch structure according to claim 1. The switch structure according to claim 5, wherein the base is fitted and fixed to the key top or the cover. The potential at the receiving point is a ground potential,
A ground contact is formed on the base,
The ground contact is formed to be in contact with or close to the upper side of the receiving portion,
The switch structure according to claim 1. Button,
A base on which the button is mounted on the surface;
A back plate that is located on the back side of the base and has a receiving portion that contacts a part of the back of the base when the button is pressed;
A display device.

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