KR100795893B1 - Keypad for the computer - Google Patents

Abstract

A key input device for a computer is provided to prevent incorrect operation of the computer by preventing pressing other keys neighboring to the pressed key when one key is pressed, and reduce thickness of the key input device remarkably while getting the key input device flat and thin. A touch panel forms a plurality of buttons(111) and includes a punched boundary line for discriminating each button. A key signal generator(151) generates a key signal corresponding to button manipulation. A touch transferor is installed between the touch panel and the dome switch, is made of an elastic material bent when the button is pressed, forms a projection line(131) inserted into the boundary line at an upper side, and includes a pressing projection(135) and a bending preventing member(137). The pressing projection is installed to a rear side corresponding to each button and presses the dome switch to generate the key signal when the button is pressed. The bending preventing member is formed around each pressing projection with a sill higher than the pressing projection and prevents other pressing projections from pressing the dome switch when the pressing projection presses the dome switch.

Description

Key input device for computer {keypad for the computer}

1 is a cross-sectional view of a conventional keypad that can be applied to a handheld-based handheld device,

Figure 1a is a planar photo showing an example of the metal foil shown in Figure 1,

2 is an exploded perspective view of a key input device for a computer according to an embodiment of the present invention;

2A and 2B are enlarged perspective views of portions 'B' and 'C' shown in FIG. 2, respectively;

3 is a rear view of the touch transmitting unit shown in FIG. 2;

3A is an enlarged perspective view of a portion 'D' shown in FIG. 3,

4 is an exploded perspective view of a key input device for a computer according to another embodiment of the present invention;

5 is a cross-sectional view taken in the AA direction of FIG.

FIG. 6 is a cross-sectional view showing a portion 'E' shown in FIG. 5 and a key signal generating means to be placed thereunder.

*** Explanation of symbols for the main parts of the drawing ***

10: metal touch pad 11: metal foil

12: silicon pad 14: boundary line

20: dome switch 30: LED

40: PCB

110, 210: touch panel 211, 111: button

113: boundary line 115: line te

117: pad hole 120, 220: adhesive

121: button adhesive tape 123: edge adhesive tape

130 and 240: touch transfer unit 131: protrusion line

133: key compartment 135: pressing projection

137: bending prevention member 140: dome switch

150: PCB 151: key signal generation unit

The present invention relates to a key input device for a computer. In particular, the key input device applied to a small device such as a mobile communication terminal is thin, but the number of buttons is much larger and wider than this, and the user can operate the buttons correctly. It relates to a key input device for a computer to be input.

In general, the keypad (keypad) is a device for generating a key signal corresponding to various numbers, letters or symbols, etc. Applicant has applied for a keypad that can be applied to a handheld-based small device in Korea Patent No. 525320 I have suggested.

1 is a cross-sectional view of a conventional keypad that can be applied to a handheld-based small device, Figure 1a is a plan view showing an example of the metal foil shown in FIG.

That is, a printed circuit board (PCB) 40 in which a dome switch 20 and a light emitting diode 30 are installed below the keypad having a form proposed by the applicant as shown in FIG. 1. The metal touch pad 10 in which the metal foil 11 and the silicon pad 12 are integrated is positioned at an upper portion thereof. Here, as shown in FIG. 1A, a boundary line 14 for separating each key is perforated on the top surface of the metal foil 11, and the silicon pad 12 disposed below the boundary line 14. The protruding part of is exposed to the outside.

In FIG. 1A, reference numeral 16 denotes letters, numbers, or symbols engraved on each key by an etching technique, and 15 denotes an epoxy film which prevents foreign matter from entering into the keypad.

The metal touch pad 10 has a thickness within 0.5 mm, particularly preferably about 0.2 mm. Therefore, for example, a small device to which the metal touch pad 10 is applied, there is an advantage that the thickness of the cellular phone is significantly thinner.

However, according to the above-described conventional keypad, in order to apply to a computer, such as a notebook (desktop), desktop (desktop) or laptop (laptop) that requires a larger number of keys than a small device, the metal touch pad 10 than when applied to a small device Should be much wider, if a certain purpose key is pressed, the keypad is bent due to the thin thickness, accordingly there is a problem that the computer is malfunctioning by pressing the dome switch to the surrounding keys.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and when a key is pressed, other keys around the key are prevented from being pressed, thereby preventing the computer from malfunctioning and ultimately reducing the thickness of the computer. The object is to provide a key input device.

In order to achieve the above object, a key input device for a computer according to the present invention includes a touch panel which forms a plurality of buttons, and a boundary line for separating each button is perforated; A key signal generating means for generating a key signal corresponding to the operation of the button, and an elastic body provided between the touch panel and the key signal generating means, the elastic body being bent by pressing down the button, and having an upper surface on the boundary line. A push-out line is formed to be fitted, and a pressing protrusion for pressing down the key signal generating means is formed at a back portion corresponding to each of the buttons so that the key signal is generated by pressing the button. At the periphery of the jaw is higher than the push projections, if any push projections to press the key signal generating means, the touch transmission unit is formed a bending preventing member for preventing another push projections to press the key signal generating means It provides a key input device for a computer made.

A key input device for a computer according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is an exploded perspective view of a key input device for a computer according to an embodiment of the present invention, illustrating a key input device applied to a notebook. Of course, it should be noted that the present invention is not limited to the computer of this structure. 2A and 2B are enlarged perspective views of portions 'B' and 'C' shown in FIG. 2, respectively, FIG. 3 is a rear view of the touch transmission unit shown in FIG. 2, and FIG. 3A is shown in FIG. 3. An enlarged perspective view of a portion 'D'.

As shown in FIG. 2, the computer key input device (internal key input device) of this invention is largely the touch panel 110 which forms the several button 111, and the pressure applied to this touch panel 110. FIG. The key signal generating means to be formed at the bottom, for example, a touch transmission unit 130 for transmitting to the dome switch and the adhesive agent 120 for bonding the touch transmission unit 130 and the touch panel 110 is made of .

In the above-described configuration, reference numeral 117 detects a touch of a finger, a pen, or the like, and accordingly touches to expose a touch pad for moving a cursor on a computer screen such as a mouse. It is a pad hole punched in the lower end of the panel 110.

Next, the round button 111 formed at the top of the touch panel 110 is a button for power on / off (hereinafter, referred to as a power button), that is, three buttons 111 formed below the pad hole 117. Denotes a cursor control button (hereinafter referred to as a cursor button), and buttons 111 formed together at a central portion are key input buttons for inputting numbers, letters, or symbols.

Next, as shown in FIG. 2A, a boundary line 113 for separating each button 111 is formed in the touch panel 110, and a line frame 115 is formed around the boundary line 113. do. Here, for the convenience of the following description, the present applicant limits the line frame 115 to a border within 1 mm from a predetermined portion that contacts the boundary line 113, for example, the boundary line 113.

Next, as shown in FIG. 2B, an upper surface of the touch transmission unit 130, that is, a surface facing the touch panel 110 is formed with a raised line 131 fitted to the boundary line 113. Here, the two-out line 131 should protrude from the upper surface of the touch panel 110 so that each button 111 can be distinguished by a touch, it is preferable that the thicker than the touch panel 110. In addition, the Applicant is referred to as the key partition surface 133, each bottom surface of which the button 111 is seated when the tap line 131 is circumscribed and the tap line 131 is fitted to the boundary line 113. Although not specifically indicated by reference numerals on the upper surface of the touch transmission unit 130, a surface other than the key partition surface 133, that is, a surface on which the line frame 115 is seated is defined as a 'border surface'.

Next, as shown in FIGS. 3 and 3A, a key signal generating means, for example, a pressing protrusion 135 for pressing a dome switch, is placed on a rear surface of the touch transmission unit 130. It is formed at a portion corresponding to 133, and around the pressing projection 135, a bending prevention member 137 having a higher jaw than the pressing projection 135 is formed at the portion corresponding to the tapping line 131. . In this case, the bending preventing member 137 is a surface on which the touch transmission unit 130 is to be placed, for example, a jaw abutting against the PCB surface, and a portion which does not contact the button 111 when an arbitrary button 111 is pressed. Prevents bending

Next, the adhesive 120 is a border adhesive tape 123 for adhering the 'border surface' of the touch transmission unit 130 and the line frame 115 of the touch panel 110, the button 110, and the key partition surface. It consists of a plurality of button adhesive tapes 121 for adhering 113.

Meanwhile, the material of the touch panel 110 may be a metal such as stainless steel, phosphor bronze, brass, or aluminum, or a synthetic resin such as polycarbonate (PC), polyethylene terephthalate (PET), acrylic (ACRYL), or polyethylene naphthalate (PEN). Can be. Here, when the material of the touch panel 110 is metal, the thickness thereof is preferably 1 mm or less, and in the case of synthetic resin, the thickness thereof is preferably 0.8 mm or less.

Preferably, the adhesive 120 is a tape or a film having adhesiveness on both sides, but in some cases, an adhesive in a liquid form may be directly applied to the touch panel 110 or the touch transfer unit 130.

The touch transmission unit 130 is an elastic body, the material is preferably silicon (Silicon).

4 is an exploded perspective view of a key input device for a computer according to another embodiment of the present invention.

As shown in FIG. 4, the key input device of the present invention includes a touch panel 210 forming a plurality of buttons 211 for inputting numbers, letters, or symbols, and the pressure applied to the touch panel 210. It includes a touch transmitting unit 230 for transmitting to the key signal generating means to be formed in the lower portion and the adhesive 220 for bonding the touch transmitting unit 230 and the touch panel 210.

Here, the touch panel 210, the adhesive 220, and the touch transmission unit 230, respectively, in the structure and the material thereof, the touch panel 110, the adhesive 120, and the touch transmission described above with reference to FIG. 2. Same as the unit 130. However, the touch panel 210 may be a panel in which a key input button is formed, whereas the touch panel 110 may be viewed as a structure in which each panel forming the power button, the cursor button, and the key input button is combined. That is, in the key input device according to the present invention, the touch panel in which the button is formed may be manufactured in an integrated form in which each panel is a body as shown in FIG. Can be.

FIG. 5 is a cross-sectional view taken along the AA direction of FIG. 2 in a coupled state, and FIG. 6 is a sectional view showing a portion 'E' shown in FIG. 5 and a key signal generating means to be placed thereunder.

As shown in Fig. 6, the key signal generating means applicable to the present invention includes a dome switch 140 placed inward of each bending preventing member 137, and a dome switch placed under the dome switch 140. It includes a PCB 150 having a key signal generator 151 for generating an arbitrary key signal when contacted with the 140.

Hereinafter, a preferred key input process of the present invention will be described in detail with reference to FIG. 6.

As shown in FIG. 6, the user applies a force in the 'f' direction. At this time, the button 111 transmits this force to the key partition surface 133, and the key partition surface 133 is bent by the force transmitted from the button 111, and thus, the push projection 135 The dome switch 140 and the key signal generator 151 are in contact with each other by pressure. Here, the button 111 is a part of the touch panel 110 and the touch panel 110 is bonded to the touch transmission unit 130. Accordingly, the force applied to the button 111 may be applied in addition to the direction of 'f'. The touch transmitting unit 130 is applied to the whole. Accordingly, the touch transfer unit 130 is bent by dispersing the force in the 'g' direction other than the 'f' direction to which the bending preventing member 137 formed around the pressing protrusion 135 is directly applied to the PCB 150. And the contact between the other dome switch and the key signal generator is prevented.

The computer key input device of the present invention is not limited to the above-described embodiments, and can be modified in various ways within the scope of the technical idea of the present invention.

According to the computer key input device of the present invention as described above, by preventing the overall bending due to the pressing pressure to prevent the other keys around the key is pressed when a key is pressed, accordingly To prevent malfunction.

Therefore, a wider and thinner key input device can be implemented, which can significantly reduce the thickness of a computer, for example, a notebook or a keyboard.

Claims (6)

A touch panel forming a plurality of buttons and perforated with a boundary line separating the respective buttons; Key signal generating means for generating a key signal corresponding to the operation of the button; It is provided between the touch panel and the key signal generating means, the elastic body is bent by the pressing of the button, the upper surface is formed with a line to be fitted to the boundary line, the back portion corresponding to each of the buttons A pressing protrusion for pressing down the key signal generating means is formed so that the key signal is generated by the pressing of the button, and a circumference of each pressing protrusion is lowered than the pressing protrusion so that any pressing protrusion is the key. When the signal generating means is pressed, the key input device for a computer comprising a touch transmission unit is formed a bending preventing member for preventing another pressing projection to press the key signal generating means. The method of claim 1, Further comprising an adhesive for bonding the touch panel and the touch transfer unit, The adhesive is a key input device for a computer, characterized in that the adhesive tape on both sides or a film. The method of claim 2, And the dripping line is thicker than the touch panel. The method of claim 3, wherein The key input device for a computer, characterized in that the material of the touch transmission unit is silicon. The method according to any one of claims 1 to 4, The touch panel has a thickness of less than 1mm when the material is a metal, and a thickness of less than 0.8mm when the material is a synthetic resin. The method of claim 5, The touch panel is a key input device for a computer, characterized in that the structure is separated for each panel forming at least one button.

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