JPH04120930U - Panel stress relief structure - Google Patents

Abstract

(57) [Summary] [Purpose] Even if a low-hardness material is used for the printed circuit board to which the liquid crystal display element and push button switch are attached, the liquid crystal display element will malfunction due to poor contact when operating the push button switch. Provides a stress-relieving structure for panels without [Configuration] Liquid crystal display element 6 and push button switches 10a, 10
A slit 15 is provided in the printed circuit board 1 to which the switch 1 is attached, at a position between the liquid crystal display element 6 and the push button switches 10a and 10b. [Effect] Poor contact of the liquid crystal display element due to operation of the push button switch is prevented.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to the stress relaxation structure of panels, especially for liquid crystals formed from printed circuit boards. The present invention relates to a stress relaxation structure for a panel equipped with a display element.

0002

[Conventional technology]

Equipped with an LCD module and a push button switch for LCD display. Panels are widely used in various electronic devices. Figure 3 shows this type of conventional panel. FIG. 4 is an explanatory diagram showing the structure of the LCD module. Ru. As shown in these figures, rubber connectors are installed on the printed circuit board 1 that constitutes the panel. A metal frame is connected to the printed circuit board 1 via the rubber connector 2. A liquid crystal display element 6 is connected and surrounded by a body 5. Said rubber connector 2, gold An LCD module 7 is composed of the frame 5, the liquid crystal display element 6, and the like. L The printed circuit board 1 near the lower edge of the CD module 7 has, for example, a tact switch, etc. Push button switches 10a and 10b are attached to the side of the liquid crystal module 7. Push button switches 11a to 11c are installed in parallel to the It is arranged for easy operation. A liquid crystal display element 6 is mounted on the back side of the printed circuit board 1. An LCD driving IC 1a for operation is mounted.

0003 This type of panel has 12 mounting holes formed in the panel that can be used to place electronic devices. Push button switches 10a, 10b, 11a to 1 are used by being fixed in place with screws. By pressing and operating 1c, the display corresponding to each operation will be displayed on the liquid crystal display. This is done by the display element 6. In this case, the printed circuit board 1 forming this type of panel is As for the material, paper phenolic resin material is often used to reduce costs. I'm getting used to it.

0004

[Problem that the idea aims to solve]

In the conventional panel described above, the printed circuit board 1 that forms the panel is often used. The paper phenol resin material used is a material with relatively low hardness, so it is particularly difficult to press buttons. When the switches 10a and 10b are pushed in, the display on the liquid crystal display element 6 is unstable. It may be fixed. That is, in this case, the push button switch 10a or the push button switch By pushing in 10b, stress is generated on the printed circuit board 1 that makes up the panel. The printed circuit board 1 is also dented at the mounting position of the push button switches 10a and 10b. bend. This bending of the printed circuit board 1 extends to the LCD module 7, and the rubber connector 2 If the connection becomes defective, the electrical contact between the printed circuit board 1 and the liquid crystal display element 6 becomes defective. It may happen. When such a contact failure occurs, the pushbutton switch may become disconnected due to display omissions, etc. The LCD display element 6 does not accurately display the display corresponding to the user's operation, resulting in erroneous display operation. will be carried out.

[0005] This invention was made in view of the current state of conventional panels of this type as mentioned above. The purpose is to print printed circuit boards made of materials with low hardness such as paper phenolic resin materials. Even if the panel is formed with Therefore, we have developed a stress relaxation structure for the panel that will prevent the display of the liquid crystal display element from becoming unstable. It is about providing.

[0006]

[Means to solve the problem]

The above purpose is to attach the liquid crystal display to the printed circuit board that makes up the panel via a rubber connector. A push button is attached to the printed circuit board near the liquid crystal display element. A switch is attached to the switch, and the switch includes the liquid crystal display element and the push button switch. With respect to the panel, in the panel structure operated by the push button switch, the printer A slit is formed in the front substrate between the liquid crystal display element and the push button switch. This is achieved by

[0007]

[Effect]

By such means, the push button switch attached to the printed circuit board forming the panel Occurs on the printed circuit board around the operated push button switch when the push button is pressed. The stress is caused by the slit formed between the push button switch and the liquid crystal display element. , almost no signal is transmitted to the printed circuit board position where the liquid crystal display element is attached. For this reason, the stress generated on the printed circuit board when the push button switch is operated causes the liquid crystal display to The printed circuit board portion to which the display element is attached will no longer bend. accordingly , by operating the push button switch, the printed circuit board forming the panel and the rubber connector are connected. A contact failure may occur between the LCD display element attached to the printed circuit board due to There will be no more trouble.

[0008]

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Here, Figure 1 is An explanatory diagram of the panel of the example, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. Components that are the same as those in FIGS. 3 and 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

[0009] The printed circuit board 1 of the embodiment is made of a low hardness material such as paper phenol resin material, As shown in FIGS. 1 and 2, the lower edge of the LCD module 7 and the push button switch 10a , 10b, a slit 15 is formed along the metal frame 5. This suritsu If there is a conductor part of the printed circuit board 1 in the area where the contact 15 is formed, the conductor part Create a flexible cable equivalent to the circuit in the body and cross the slit 15. Before forming the slit 15 and the printed circuit board. It is sufficient to make the circuit states of No. 1 equivalent. Note that this slit 15 is not limited to a long hole shape. In short, it is sufficient to block the bending on the push button switch side, and various shapes can be applied.

0010 In an embodiment with such a configuration, the printed circuit board 1 constituting the panel is By operating the attached push button switches 10a and 10b, the push button switch 1 Stress is generated in the mounting parts of 0a and 10b, and the printed circuit board 1 near these mounting parts is dented. Deforms into a planar shape. However, between the push button switches 10a, 10b and the liquid crystal display element 6, , the slit 15 is provided, so that it will not occur when the push button switches 10a and 10b are operated. The stress (bending) caused by this is blocked by this slit 15, and the liquid crystal display element 6 is attached. The 1st part of the printed circuit board that is placed on the wall will not bend.

[0011] For this purpose, by pressing the push button switches 10a and 10b, the liquid crystal display The part of the printed circuit board 1 on which the element 6 is attached is bent, and the plug is inserted through the rubber connector 2. There is a poor contact between the liquid crystal display element 6 attached to the printed circuit board 1 and the printed circuit board 1. occurrence is prevented. Therefore, according to the embodiment, the material of the printed circuit board 1 is paper. Even if a low hardness material such as phenolic resin material is used, the operation of the push button switches 10a and 10b will be difficult. During operation, the liquid crystal display element 6 may have poor contact and cause incorrect display operations such as display omission. Totally preventable.

0012

[Effect of the idea]

As explained above, in this invention, the printed circuit board is made of paper phenol resin material, etc. Even if low-hardness materials are used, the LCD display element may cause poor contact when operating the push button switch. Erroneous display operations are completely prevented.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is an explanatory diagram showing the configuration of a conventional panel.

FIG. 4 is an enlarged explanatory diagram of the LCD module portion.

[Explanation of symbols]

1 Printed circuit board 2 Rubber connector 5 Metal frame 6 Liquid crystal display device 7 LCD module 10a, 10b push button switch 11a-11c push button switch 15 Slits

Claims (2)

[Scope of utility model registration request] 1. A liquid crystal display element is attached to a printed circuit board constituting a panel via a rubber connector, a push button switch is attached to the printed circuit board near the liquid crystal display element, and a push button switch is attached to the printed circuit board to connect the liquid crystal display element to the liquid crystal display element. For the panel equipped with a push button switch, in the panel structure operated by the push button switch, a slit is formed in the printed circuit board between the liquid crystal display element and the push button switch. Stress relief structure of the panel. 2. The stress relaxation structure for a panel according to claim 1, wherein the printed circuit board is a paper phenol resin board.