KR100685258B1 - Mobile communication terminal having side key - Google Patents

Abstract

A mobile communication terminal with a side key is provided to form key row lines and a key column line on a side of a PCB(Printed Circuit Board) to use the PCB side as a side key input unit, therefor a separate switch for receiving a signal from a user is not required, consequently the number of components is reduced. A key column line(160) and key row lines(170) for receiving a signal inputted from a side key button(400) are formed by being extended up to a side of a main PCB(140) comprised inside a mobile communication terminal. The key column line(160) and the key row lines(170) are formed on the side of the main PCB(140) by thin copper materials. The side key button(400) is made of an elastic rubber material. A contact unit which is a conductor is disposed on an inner side of the side key button(400) opposing a side key button part exposed to the outside of a case of the terminal.

Description

Mobile communication terminal having side keys

1 is a front view of a tact type side key according to the prior art,

2 is a front view of an FPCB type side key according to the prior art,

3A is a front view of a side key input unit of a main PCB according to a preferred embodiment of the present invention;

3B is a side view of a side key input unit of a main PCB according to a preferred embodiment of the present invention;

4A is a cross-sectional view of a main PCB and side key according to a preferred embodiment of the present invention;

4B is an operational state diagram of a side key according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: tact type button 120: button part

130: case 140: main PCB

150: housing 160: key column line

170: key low line 200: FPCB type side key

210: dome sheet 220: dome sheet side connector

230: main PCB side connector 240: dome key

400: side key button 410: body portion

420: contact

The present invention relates to a mobile communication terminal having a side key. More specifically, the line of the side key input portion formed on the main PCB extends to the end of the main PCB and is connected to the line extending on the end side of the main PCB to form the copper column key column line and key row line, rubber material And a side key button having a side key for forming a contact portion for inputting a signal in a key column line and a key row line.

In general, the mobile communication terminal has a main function of the voice call means, but as the information and communication industry and the mobile communication terminal industry have developed rapidly, mobile communication terminals such as mobile phones and PDAs have a voice call function as well as games, internet search, and e-mail. Various functions such as receiving / sending and remittance or payment through a bank account are being added. In particular, the demand for mobile communication terminals equipped with multimedia functions has increased exponentially with young people interested in video media such as photos, movies, or music videos. Possible mobile terminals are correspondingly being supplied in large quantities.

As such, mobile communication terminals that can use not only voice calls but also various functions such as photo, movie, music viewing, video recording and playback are being supplied in large quantities, but the mobile communication terminals can be operated more easily and effectively. It is a general trend to add buttons to the side as well as the front part.

1 is a front view of a tact type side key according to the prior art, and FIG. 2 is a front view of an FPCB type side key according to the prior art. 1 and 2 illustrate a side key input unit of a main printed circuit board (PCB) 140 embedded in a mobile communication terminal.

The side key input of the main PCB 140 has three lines, the middle of which is a key column line (160) and the other two lines are a key row line (170). When the key column line 160 and the key row line 170 contact each other by a switch or the like, the mobile communication terminal recognizes a signal input.

The tact type side key fixes the tact type button 110 to the main PCB 140 by soldering or the like. The tact type button 110 includes a button unit 120, a case 130, a housing 150, a key column line 160, and a key row line 170. When pressed, the button unit 120 which is in contact with the side key is pressed together, and the first contact point (not shown) and the key row line 170 connected to the key column line 160 of the main PCB 140 in the case 130. ) And a second contact (not shown) connected to each other are in close contact with each other to input a signal. When the side key button is pressed, the tact type button 110 receives a force to the left. The housing 150 is made of metal and prevents the tact type button 110 from being biased to the left by the force. It is firmly fixed to).

The flexible printed circuit board (FPCB) type side key 200 includes a PCB side connector 230, a dome sheet 210, a dome sheet side connector 220, and a dome switch 240. A main PCB side connector 230 is provided on the main PCB 140, and a dome sheet side connector 220 is provided on one side of the dome sheet 210 so as to be detachable from the main PCB side connector 230. One side of the other side is provided with a dome switch 240. The dome sheet 210 is a thin plate structure that is flexible with FPCB and has a line through which electricity can flow inside or outside. The dome switch 240 has a key row line when a user presses a side key button 180. It is a type of switch that is attached to the dome-shaped first conductor connected to the 170 and the dome sheet, and the signal is in contact with the second conductor connected to the key column line 160.

By the way, since the tact type button and the FPCB type button have a large number of parts, a lot of manufacturing cost and manufacturing time are required, and as the number of parts increases, defects increase.

In order to solve this problem, the present invention, by extending the line of the side key input portion formed in the main PCB to the end of the main PCB and connected to the line extending to the end side of the main PCB thin column key column line and key row line To provide a mobile communication terminal having a side key button made of rubber material and the side key button has a side key for forming a contact portion for signal input on the key column line and the key row line. .

In order to achieve the above object, the present invention, in the mobile communication terminal having a side key formed on the side of the mobile communication terminal and receiving a signal from the user and a side key including a main PCB (Printed Circuit Board), Provided is a mobile communication terminal having a side key, wherein a key column line and a key row line are formed on a side surface of a main PCB provided in the mobile communication terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

3A is a front view of a side key input unit of a main PCB according to a preferred embodiment of the present invention, and FIG. 3B is a side view of a side key input unit of a main PCB according to an embodiment of the present invention. The key column line 160 and the key row line 170 formed on the main PCB 140 extend to the right end surface of the main PCB 140 and the extended key column line 160 and the key row line 170. By connecting to form a line to the lower side of the main PCB 140 side. The thickness of the main PCB 140 of the mobile communication terminal is about 1 mm, the line formed on the side of the main PCB 140 is a thin copper (Copper) material.

Figure 4a is a cross-sectional view of the main PCB and the side key according to a preferred embodiment of the present invention, Figure 4b is an operational state diagram of the side key according to a preferred embodiment of the present invention.

Side key button 400 is composed of a contact portion 420 and the body portion 410, the contact portion 420 is the main PCB when the user presses the side key button 400 protruding out of the mobile terminal case 430 The key column line 160 and the key row line 170, which are signal input lines formed on the side surfaces of 140, are simultaneously contacted to serve to input a signal. The contact portion 420 may be any material as long as it is a conductive material, and is preferably a carbon coating or a dome switch.

When the carbon coating ejects the body 410 of the side key button 400 and is assembled to the case of the mobile communication terminal, the carbon coating is thinned by using an adhesive such as a bond on the side facing the part receiving the input from the user. Bonding carbon, dome switch is dome-shaped, and is a thin film of metal and elastic, so it is elastically deformed while contacting the key column line 160 and the key row line 170 at the same time to input a signal, similar to the carbon coating adhesive Adhesive to the body portion 140 using.

The body part 410 is made of elastic rubber or the like and is normally maintained as shown in FIG. 4A, but when the user presses the side key button 400 protruding to the outside of the mobile communication terminal case 430, the body as shown in FIG. 4B. As the unit 410 is pressed, the key column line 160 and the key row line 170 formed on the side of the main PCB 140 are simultaneously contacted to input a signal.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, since a key row line and a key column line are formed on the side of the main PCB, the main PCB side is used as the side key input unit, thereby eliminating the need for a separate switch to receive a signal from the user. As the number of parts is reduced, the manufacturing process is simplified and the manufacturing cost is reduced.

Claims (6)

Side key buttons formed on the side of the mobile communication terminal and receiving a signal from the user and a side key including a main printed circuit board (PCB) located inside the mobile communication terminal and forming a circuit for performing various functions. In the mobile communication terminal provided, Extends a key column line and a key row line for receiving the signal input from the side key button to the side of the main PCB in the main PCB provided in the mobile communication terminal. Mobile communication terminal having a side key, characterized in that formed by. The method of claim 1, The key column line and the key row line is a thin copper (Copper) material having a side key, characterized in that formed on the side of the main PCB. The method of claim 1, The side key button is a mobile communication terminal having a side key, characterized in that the elastic rubber material. The method according to claim 1 or 3, And a conductor contact portion provided inside the side key button facing the side key button portion exposed to the outside of the case of the mobile communication terminal. The method of claim 4, wherein The contact portion is a mobile communication terminal having a side key, characterized in that the coating of carbon. The method of claim 4, wherein And the contact portion is a dome key.

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