JP4749404B2 - Switch board holding structure - Google Patents

Description

  The present invention relates to a holding structure for a switch board housed in a casing composed of an upper case and a lower case.

  In a product in which an electronic circuit or the like is housed in a casing composed of an upper case and a lower case, the push button for operation is exposed on the upper case, and the internal switch is turned on by pressing the push button. (For example, refer patent document 1).

  In such a product, a plurality of push buttons are provided, and a switch is provided for each of the push buttons. These switches are prepared in advance as switch boards soldered on the board, and the switch boards are accommodated in a casing. The switch board is normally configured to be held in a lower case, and then the casing is closed by aligning the upper case with the lower case.

In the device described in Patent Document 1, a plurality of boss-like substrate installation portions are erected from the inner bottom surface of the lower case, and the switch substrate is placed on the substrate installation portion to hold the switch substrate. It is configured.
Japanese Patent Laid-Open No. 2002-19224 (FIG. 6)

  When the push button is pushed, the push-down force acting on the push button acts on the switch on the switch board as it is. In the above-mentioned conventional one, the switch board is held by each board installation part, and even if there are a plurality of board installation parts, each board installation part is point-supported, so it is not held by the board installation part In the portion, there is a problem that the switch board is bent by the pressing force from the push button.

  Deflection of the switch board in this manner is not preferable because not only the operational feeling when the push button is pushed is impaired, but the switch board may be cracked.

  In view of the above problems, an object of the present invention is to provide a switch board holding structure in which the switch board does not bend even when a push button is pressed.

In order to solve the above-described problems, the switch board holding structure according to the present invention has an upper surface in which a switch pushed by pushing down a push button member exposed to the upper case is placed in a casing for a liquid crystal television set composed of an upper case and a lower case. In the switch board holding structure for holding the mounted switch board, a plurality of switches are arranged side by side on the switch board, and the switch board is housed in a casing with long ribs along the direction in which the switches are arranged. In this state, the upper surface of the rib is provided in the lower case so that the upper surface of the rib continuously contacts the lower surface of the switch board and does not form a space surrounding the rib, and the rib extends in a direction perpendicular to the longitudinal direction. the reinforcement portion is formed so as to be positioned below the respective switches, intersections of the ribs and the reinforcing portion is to be located directly below the switch And wherein the door.

  When the upper surface of the rib is continuously in contact with the lower surface of the switch substrate, the switch substrate is held by the continuous rib instead of a point, so that even if a pressing force acts on the switch substrate, it is difficult to bend.

  In addition, if the reinforcing portion extending in the direction perpendicular to the longitudinal direction is formed on the rib so as to be positioned below each switch, the rib and the reinforcing portion can reliably receive the pressing force acting on the switch board. The pressing force does not act to bend the switch board.

  Referring to FIG. 1, reference numeral 1 denotes an upper case formed by injection molding, and constitutes a casing by being combined with a lower case 2 also formed by injection molding. In the present embodiment, this casing is a casing for a liquid crystal television.

  A push button member 11 is attached to the upper case 1 in a state where it can be pushed down. Further, the lower case 2 is formed with ribs 3 that are elongated along the direction in which the push button members 11 are arranged. Further, the rib 3 is provided with a plurality of reinforcing portions 31 so as to protrude in a direction perpendicular to the longitudinal direction of the rib 3.

  Reference numeral 4 denotes a switch board, and a switch 41 is soldered to the upper surface corresponding to each of the push button members 11. The switch board 4 is attached to the lower case 2. When the switch board 4 is attached to the lower case 2, the upper surface 3 a of the rib 3 and the upper surface 31 a of the reinforcing portion 31 are all in contact with the lower surface of the switch board 4. It is configured.

  As shown in FIGS. 2 and 3, when the upper case 1 is coupled to the lower case 2, the switch 41 is located below each push button member 11, and the portion where the reinforcing portion 31 is formed is located below the switch 41. Configured to be located.

  Therefore, when the push button member 11 is pushed down, the push-down force acts on the switch 41, but the push-down force is received by the rib 3 and the reinforcing portion 31 and does not act so as to bend the switch board 4. Therefore, even if the push button member 11 is pushed in with a large depressing force, the switch board 4 does not bend.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

The figure which shows the structure of one embodiment of this invention Side view showing switch board holding state Top view showing the holding state of the switch board

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3 Rib 4 Switch board 11 Pushbutton member 31 Reinforcement part 41 Switch

Claims (1)

In a switch board holding structure in which a switch pressed by pressing down a push button member exposed to an upper case is held in a casing for a liquid crystal television composed of an upper case and a lower case. A plurality of switches are arranged side by side on the board, and the ribs that are long along the switch arrangement direction are in continuous contact with the lower surface of the switch board while the switch board is housed in the casing. The ribs are provided in the lower case so as not to form a space surrounding the ribs, and the ribs are provided with reinforcing portions extending in a direction perpendicular to the longitudinal direction so as to be positioned below the switches. A switch board holding structure characterized in that an intersection between the switch and the reinforcing portion is located immediately below the switch.

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