Key region assembly for portable communication terminal device and manufacturing method thereof

A communication terminal and portable technology, which is applied in the direction of telephone communication, selection device, telephone structure, etc., and can solve the problems of increased overall thickness of the keypad assembly, poor tapping sensitivity, and low tapping rate, etc., and achieves a good tapping feeling , The loss of accessories is minimized, and the effect of high knock rate

Inactive Publication Date: 2007-01-24
LG ELECTRONICS (CHINA) R&D CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] As far as this existing keypad assembly is concerned, the shrapnel pad and the electroluminescent pad are located on the metal shrapnel, and the overall thickness of the keypad assembly is increased.
[0015] In addition, the tapping rate is low, and the user needs to repeatedly tap the same key, which is inconvenient, and there is a problem of poor tapping sensitivity

Method used

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  • Key region assembly for portable communication terminal device and manufacturing method thereof
  • Key region assembly for portable communication terminal device and manufacturing method thereof
  • Key region assembly for portable communication terminal device and manufacturing method thereof

Examples

Experimental program
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Embodiment Construction

[0037] The invention is explained in more detail below by means of an advantageous embodiment of the invention shown in the accompanying drawings.

[0038] The printed circuit board 30 is provided with a fixed contact terminal 31 and a ground terminal, hereinafter referred to as a "main board ground terminal" 32 .

[0039] As shown in the figure, the electroluminescent pad 20 has a switch terminal 21 and a ground terminal 22 on the upper and lower sides, and the switch terminal 21 and the ground terminal 22 are electrically connected to the upper and lower sides respectively. Wherein, as shown in the figure, the energization of each terminal formed on the upper and lower sides can be realized by directly penetrating the electroluminescent pad 20 and directly connecting the corresponding terminals on the upper and lower sides. Instead, the luminescent pad 20 is energized by detours through its sides.

[0040] As above, the electroluminescent pad 20 is installed above the print...

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Abstract

The present invention relates the field of the technology of a key region assembly for a portable communication terminal device. The key region assembly is characterized in that the assembly includes: a printed circuit board with a fixed contact terminal and a mainboard earth terminal; an electroluminescent mat installed on the printed circuit board, and a switch terminal and an earth terminal that electrifies mutually are printed on the front and back surface of the electroluminescent mat; a metal elastic sheet is installed on the top of said electroluminescent mat, the edge of which is next to the mainboard earth termina; a key hat having a actuator underneath that can press the metal elastic sheet, and the switch terminal, the earth terminal of the electroluminescent mat and the fixed contact terminal and the mainboard earth terminal of the printed circuit board are corresponded one to one. When the key hat is pressed, the actuator connects the switch terminal with the fixed contact terminal through the metal elastic sheet, luminizing the electroluminescent mat. The present invention has the advantages of small volume, high knocking frequency, and good knocking feel.

Description

technical field [0001] The invention relates to a keypad assembly that can be applied to a portable communication terminal device (usually called a mobile phone or a walkie-talkie, hereinafter referred to as a "mobile phone"). More specifically, it relates to a metal shrapnel mounted on an electroluminescent pad (EL sheet) ), a keypad assembly and a manufacturing method thereof that can realize miniaturization of the product, a high tapping rate, and a good tapping feeling. Background technique [0002] Generally speaking, the keypad is used in communication equipment such as mobile phones, and is used as a switch device required for generating signals and performing various additional functions. This switch device has keys printed with numbers or characters, and the keys are inserted into the front shell of the communication equipment. In the hole with, a part of it protrudes from the outside of the front shell. [0003] Among the keys constituting such a keypad, a printed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/22H04Q7/32H04M1/02
CPCH04M1/0231H04M1/026
Inventor 牟赞容
Owner LG ELECTRONICS (CHINA) R&D CENT CO LTD
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