KR20060095292A - Mobile communication terminal having multi dome switch function - Google Patents

Abstract

The present invention relates to a mobile communication terminal that can be used as a multi-dome switch. When a number or a character is input, a multi-dome switch is used to convert from a number input state to a character input state or vice versa. It relates to a mobile communication terminal that can be easily operated by.

The configuration of the present invention is a mobile communication terminal consisting of a PCB and a dome seat having a plurality of dome switches attached to and fixed to the PCB surface, wherein the dome switch is the first and second along the lower surface and the circumferential direction, respectively; A pressing portion formed with a contact portion; A third and fourth contact portion provided on the PCB surface to contact the first and second contact portions, and contact between the second contact portion and the fourth contact portion formed on the PCB surface according to the pressed state of the first contact portion. The state is made contactable or detachable.

The present invention having such a configuration is capable of performing one or more functions with one key button.

Mobile Terminal, Multi, Dome, Switch, Conversion, Easy, Key Button, Keypad

Description

Mobile Communication Terminal having Multi Dome Switch Function

1 is a plan view of a dome switch according to the present invention;

Figure 2 is a cross-sectional view for explaining the structure and operation state of the dome switch according to the present invention, Figure 2 (a) is a view of the state before pressing the dome switch, Figure 2 (b) is a state of pressing the dome switch first Figure 2 (c) is a view showing a state in which the switching operation is switched by pressing the dome switch deep

3 is a schematic circuit diagram for explaining an operating state of the present invention.

4 is a block diagram for explaining an operating state of the present invention.

* Explanation of Signs of Major Parts of Drawings *

10: PCB (printed circuit board)

11: third contact

12: fourth contact part

13: fixing member

14,15a: home

15: Contact piece

20: dome sheet

30: dome switch

31: First contact part

32: second contact part

33a: first push edition

33b: second push

33: pressing part

The present invention relates to a mobile communication terminal that can be used as a multi-dome switch, and more particularly, when converting numbers or characters from a number input state to a character input state or vice versa. The present invention relates to a mobile communication terminal that can be easily operated using a dome switch.

In general, due to the rapid development of wireless communication technology, as a mobile communication terminal becomes a necessity, many functions are added in addition to basic communication functions. As a result, the appearance of the mobile communication terminal has also undergone many changes, and various kinds have emerged.

The mobile communication terminal is basically provided with a plurality of key buttons for phone number input and use mode selection. These key buttons are composed of a keypad that is inserted into the housing of the terminal and fixed to form a module, the bottom of the keypad is provided with a dome sheet in contact with the PCB.

For example, in order to perform various functions such as a menu key button, a send key button, an end key button, and a numeric key button, a variety of key buttons are provided on the keypad to occupy much space. There was a lot of difficulty in miniaturizing the terminal.

 In addition, the conventional terminal is provided with a separate key button for converting to a number or a letter, go to the menu to enter the number or letter input conversion key button or to convert, input by the timing of pressing the key button It was.

Therefore, since a separate key button must be configured for the conversion operation, the keypad structure is complicated by that, difficulty in miniaturization is caused, and moreover, there are problems in that the user is inconvenient to use due to many key buttons. .

Accordingly, the present invention has been invented to solve the conventional problems as described above, to provide a mobile communication terminal that can be used as a multi-dome switch to freely perform the conversion of numbers and letters through one key button. There is an object of the invention.

The present invention for achieving the above object is a mobile communication terminal consisting of a PCB, a dome sheet having a plurality of dome switches while being fixed to the PCB surface, the dome switch is the center of the lower surface and the circumferential direction Pressing portions each having first and second contact portions formed along a bottom surface thereof; A third and fourth contact parts provided on the PCB surface to be in contact with the first and second contact parts;

According to the pressed state of the first contact portion, the contact state between the second contact portion and the fourth contact portion formed on the PCB surface is characterized in that the contact or detachable.

The pressing portion includes a first pressing piece which is formed between the opened openings and is formed across the radial direction of the center, and a second pressing piece which is formed integrally with the first pressing piece and formed at an edge thereof. The first and second contact portions are formed on the bottom of the piece and the second pressing piece, respectively.

The third contact portion has a support member having a groove formed therein, and a contact piece formed in the groove of the support member to be in contact with the first contact portion.

The contact piece is formed with a recessed shape so that the pressing portion can be pressed in two steps.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view showing the dome switch structure of the present invention, and shows only the contact piece 15 formed on the pressing part 33 and the lower PCB 10. 2 (a) to 2 (c) are diagrams showing in detail the dome switch structure and operation state of the present invention.

The present invention is provided with a PCB 10 provided inside the main body of the terminal, and a dome sheet 20 attached to and fixed to the PCB 10 surface, the dome sheet 20 has a plurality of dome switches 30 ) Is formed.

The dome sheet 20 is provided with a keypad (not shown) in which a plurality of key buttons are modularized so that the operation of the key buttons is performed.

Here, the present invention is provided on the pressing portion 33, the first and second contact portions 31 and 32 are formed along the bottom surface and the circumferential direction of the dome switch 30, respectively, and the PCB 10 surface The third and fourth contact parts 11 and 12 are in contact with the first and second contact parts 31 and 32.

The pressing portion 33 is formed with a first pressing piece 33a crossing in the radial direction, and openings 34 are drilled on both sides of the first pressing piece 33a, as shown in FIG. It is formed and the edge surface of the press part 33 is formed by this opening part 34, and the 2nd press piece 33b was formed.

The first contact portion 31 is formed on the bottom of the first pressing piece 33a, and the second contact portion 32 is formed on the second pressing piece 33b.

The support member 13 protrudes and is formed in the third contact portion 12, and the support member 13 is formed with a groove 14, and is formed in the groove 14 of the support member 13 so that the It is a structure in which the contact piece 15 which contacts the 1st contact part 31 was formed.

The contact piece 15 is in a state of being energized with the third contact portion 11 on the PCB 10. In addition, the contact piece 15 has a structure in which a slightly recessed groove 15a is formed to be easily pressed in two steps when the pressing part 33 descends.

The dome switch 30 is basically elastic, and when pressed and then released, the dome switch 30 has a property of restoring to its original state.

According to the present invention having such a configuration, when the pressing part 33 constituting the dome switch 30 is pressed, the first contact part formed on the center bottom surface of the first pressing piece 33a constituting the pressing part 33 is formed. 31 is in contact with the contact piece 15 fixed to the lower portion, and at the same time the second contact portion 32 formed on the bottom of the second pressing piece 33b formed along the circumferential direction of the dome switch 30 is downward. It moves to contact the fourth contact portion 12 provided on the upper surface of the PCB 10 in the drawing.

This connection state is a state in which the first key sensor 50 and the third key sensor 70 are switched as shown in FIG. 3.

In this state, when the first pressing piece 33a is pressed deeper again, the first pressing piece 33a is recessed in the groove 15a of the upper surface of the contact piece 15, as shown in Fig. 3 (c). Due to the close contact, the second pressing piece (33b) formed on the edge of the second upward contact portion 32 formed in the circumferential direction by the force acting in the upward direction is applied to the fourth contact portion 12 on the PCB (10) The contact with is released. Then, as shown in FIG. 3, the switching is switched to the second key sensor 60 and the third key sensor 70.

That is, this switching change operation means, for example, as shown in Fig. 4, that the conversion is converted to the character or number input state, respectively in the number input or character input state.

As described above, the present invention enables one or more input operations through one key button. For example, in the arrangement of terminal key buttons, such as inputting the number 1 with the menu key button, the number 2 with the send key button, or the number 3 with the end key button, among the plurality of key buttons. There is an effect that can greatly reduce the number of.

Although the present invention has been described for the embodiments of the present invention based on the accompanying drawings for convenience, it is obvious that various modifications and changes are possible within the scope of the technical idea of the present invention.

Claims (4)

In the mobile communication terminal comprising a PCB and a dome sheet having a plurality of dome switches fixed to the PCB surface, The dome switch includes: a pressing portion having first and second contact portions formed along a lower surface of the center and a lower surface of the circumferential direction, respectively; A third and fourth contact parts provided on the PCB surface to be in contact with the first and second contact parts; And a contact state between the second contact portion and the fourth contact portion formed on the PCB surface is in contact with or detachable according to the pressed state of the first contact portion. The method of claim 1, The pressing portion includes a first pressing piece which is formed between the opened openings and is formed across the radial direction of the center, and a second pressing piece which is formed integrally with the first pressing piece and formed at an edge thereof. The first and second contact portions are formed on the bottom of the piece and the second pressing piece, respectively, the mobile communication terminal can be used as a multi-dome switch. The method of claim 1, And a support member having a groove formed in the third contact portion, and a contact piece formed in the groove of the support member and in contact with the first contact portion. The method of claim 3, wherein The contact piece is a mobile communication terminal that can be used as a multi-dome switch, characterized in that the groove is formed in the recessed form so that the pressing portion can be pressed in two stages.

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