KR20060010063A - A two step type of key pad structure of mobile communication terminal - Google Patents

Abstract

The present invention provides a keypad structure of a two-stage pressing method of a mobile communication terminal configured to generate two or more electric signals per key by dividing a press of a key into a plurality of stages. There is a purpose.

The present invention for achieving the above object is a plurality of keys 10 exposed to the outside through the through hole (3) formed in the case 1, and each key 10 is located inside the case (1) A printed circuit board (PCB) 40 having a first terminal 51 and a second terminal 52 formed thereon, a flexible pad 20 disposed between the PCB 40 and the case 1, A move including a switch 30 positioned between the flexible pad 20 and the PCB 40 to connect the first terminal 51 and the second terminal 52 while elastically deforming by pressing the key 10. In the keypad structure of the communication terminal, the flexible pad 20 includes one or more protrusions 22 protruding toward the PCB 40, a conductor 25 fixed to an end of the protrusion 22, and a protrusion 22. A third terminal 53 and a fourth terminal 54 correspondingly formed on the PCB 40, and the conductor 25 has the switch 30 connected to the first terminal 51 by pressing the key 10. FIG. Before connecting the second terminal 52 That is configured to connect the third terminal 53 and fourth terminal 54 to the technical features.

The keypad structure of the two-stage pressing method of the mobile communication terminal of the present invention configured as described above is configured to generate a different electric signal for each step by pressing one key in two stages. As a result of generating a plurality of electrical signals in one key, the number of electrical signals that can be generated increases even though the number of keys decreases. That is, even if the number of keys configured in the keypad of the mobile communication terminal is reduced, the number of other types of electrical signals that can be input to the mobile communication terminal can be sufficiently secured. Therefore, the area of the keypad can be reduced, and accordingly, the size of the mobile communication terminal can be reduced.

Mobile terminal, keypad, two-level press, key

Description

A two-step type of key pad structure of mobile communication terminal

1 is a schematic diagram showing an operation relationship of a keypad of a mobile communication terminal with a two-stage push type keypad structure according to a first embodiment of the present invention;

Figure 2a is a bottom view of the flexible pad shown in Figure 1,

FIG. 2B is a plan view illustrating a pattern of the PCB illustrated in FIG. 1.

3A is a bottom view of a flexible pad of a mobile communication terminal having a two-stage push type keypad structure according to a second embodiment of the present invention;

FIG. 3B is a plan view illustrating a pattern of a PCB corresponding to the conductor of the flexible pad illustrated in FIG. 3A.

Figure 4a is a bottom view of a flexible pad of a mobile communication terminal of the two-stage push type keypad structure according to the third embodiment of the present invention,

FIG. 4B is a plan view illustrating a pattern of a PCB corresponding to the conductor of the flexible pad illustrated in FIG. 4A.

Explanation of symbols on the main parts of the drawings

1 case 3 through hole

10: key 30: flexible pad

21, 22, 22 ', 22 ": projection 25, 25', 25": conductor

30: dome switch 40: PCB

51, 52, 53, 53 ', 53 ", 54, 54', 54": terminals

53B, 54B: Branch Branch

The present invention relates to a keypad structure of a mobile communication terminal, and in particular, configured to generate two or more electrical signals per key by dividing a press of a key into a plurality of stages.

In addition to the voice call function, the mobile communication terminal has various functions such as video and video recording function, MP3 player function, and internet communication function, but its size is reduced so that it is convenient to carry. It consists.

As the function of the mobile communication terminal increases as described above, an input key also increases so that a user can select and command a desired function. However, the keypad of the mobile communication terminal is set to a minimum size so that an error does not occur when a user presses a key with a finger. Therefore, as the number of keys having the minimum size is increased, the area of the keypad is increased, and the increase of the area of the keypad acts as a limit for reducing the size of the mobile communication terminal.

The present invention is invented to solve the problems of the prior art as described above, by configuring to generate a plurality of electrical signals per key configured in the keypad, it is possible to reduce the size of the keypad and thus to reduce the size of the mobile communication terminal The purpose of the present invention is to provide a two-stage push type keypad structure of a mobile communication terminal.

The present invention for achieving the above object is a plurality of keys exposed to the outside through the through-hole formed in the case, the PCB is located inside the case and the first terminal and the second terminal corresponding to each key is formed (printed circuit board), a flexible pad positioned between the PCB and the case, and the first terminal and the second terminal are connected between the flexible pad and the PCB while being elastically deformed by pressing the key. In the keypad structure of a mobile communication terminal comprising a switch, the flexible pad has one or more protrusions protruding toward the PCB, a conductor fixed to the end of the protrusion, and a third formed on the PCB corresponding to the protrusions A terminal and a fourth terminal, wherein the conductor is formed by pressing the key before the switch connects the first terminal to the second terminal. 3 is a technical feature that is configured to connect the terminal and the fourth terminal.

In addition, the protrusions of the present invention are formed in two places of the flexible pad so as to be located on both sides with respect to the switch, two third terminals corresponding to each of the protrusions are interconnected, two fourth terminals are also interconnected do.

In addition, the protruding portion of the present invention is a semi-circular shape, the two protruding portions are formed in the flexible pad in a circular shape, the third terminal and the fourth terminal having a semi-circular shape, the two protruding portions face each other It is located corresponding to each end.

In addition, the third terminal and the fourth terminal of the present invention is in the shape of a hook, and the other terminal is located away from inside one of the terminals.

The third terminal and the fourth terminal corresponding to the protruding portion of the present invention have a shape in which a plurality of branch portions are formed, and the branch portions of the fourth terminal are inserted between the branch portions of the third terminal.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the keypad structure of the two-stage pressing method of the mobile communication terminal according to the present invention will be described in detail.

[First Embodiment]

1 is a schematic diagram showing an operation relationship of a keypad of a mobile communication terminal with a two-stage pressing method keypad structure according to a first embodiment of the present invention, Figure 2a is a bottom view of the flexible pad shown in FIG. 2B is a plan view illustrating the pattern of the PCB illustrated in FIG. 1.

As shown in FIG. 1, the case 1 of the mobile communication terminal is provided with the same number of through-holes 3 as the number of the keys 10 so that the keys 10 formed in the keypad penetrate outwardly. The flexible pad 20 is positioned below the case 1, the PCB 40 is positioned below the flexible pad 20, and the dome switch 30 is located between the PCB 40 and the flexible pad 20. Is located corresponding to the key 10.

In addition, a first protrusion 21 protrudes in correspondence with the dome switch 30 on the bottom surface of the flexible pad 20, and a plurality of second protrusions 22 are formed on a portion that does not interfere with the dome switch 30. It is formed around the first protrusion 21, and the length of the second protrusion 22 is longer than the length of the first protrusion 21. Here, the difference between the length of the second protrusion 22 and the length of the first protrusion 21 is that when the user presses the key 10 halfway in the process of pressing the key 10, the second protrusion 22 is connected to the PCB. Although there is contact with the 40, there is a difference in length such that the dome switch 30 pressed by the first protrusion 21 does not contact the PCB 40.

On the other hand, a pattern is formed on the PCB 40, and the first terminal 51 and the second terminal 52 are positioned at a point corresponding to the dome switch 30, and the second protrusion 22 of the flexible pad 20 is formed. The third terminal 53 and the fourth terminal 54 are positioned at a portion corresponding to the second terminal 53.

Hereinafter, the configuration of the keypad configured as described above will be described in more detail.

As shown in FIG. 2A, a bottom surface of the flexible pad 20 corresponding to one key 10 is formed with a first protrusion 21 at a center thereof, and a second protrusion 21 at both sides with respect to the first protrusion 21. A protrusion 22 is formed, and a conductor 25 is attached to an end of the second protrusion 22.

Meanwhile, the pattern of the PCB 40 corresponding to the first protrusion 21 and the second protrusion 22 of the flexible pad 20 shown in FIG. 2A is as shown in FIG. 2B. As shown in FIG. 2B, a ring-shaped first terminal 51 and a second terminal 52 located at the center of the first terminal 51 are positioned at a point corresponding to the first protrusion 21. The third terminal 53 and the fourth terminal 54 are formed at points corresponding to the second protrusions 22, and the third terminals 53 and the fourth terminals 54 corresponding to the second protrusions 22 are formed. ) Are interconnected.

Therefore, the center of the dome switch 30 is recessed to connect the first terminal 51 and the second terminal 52, thereby generating a first electrical signal.

On the other hand, when any one of the two second protrusions 22 is in contact with the third terminal 53 and the fourth terminal 54, the second electrical signal is generated. The reason why the two second protrusions 22 are formed in the flexible pad 20 and the two third terminals 53 and the fourth terminals 54 are formed on the PCB 40 is the key 10. In pressing, it is preferable that the user presses the center of the key 10, but in some cases, only one side of the key 10 is pressed. In the present invention, two second projections 22 are formed in preparation for this, and two interconnected third terminals 53 and fourth terminals 54 are formed on the PCB 40, respectively. In some cases, the number of the second protrusions 22 and the number of the third terminals 53 and the fourth terminals 54 may be increased.

In addition, as shown in FIG. 2B, the third terminal 53 and the fourth terminal 54 corresponding to the second protrusion 22 have a shape in which a plurality of branch parts 53B and 54B are formed, and the third terminal 53. The branch portion 54B of the fourth terminal 54 is inserted and positioned between the branch portions 53B of the fourth terminal 54.

Hereinafter will be described the operation relationship of the two-stage pressing method keypad structure of the present invention configured as described above.

When the user slowly presses the key 10 exposed to the outside of the case 1, the key 10 moves downwardly of the case 1 while protruding the first protrusion 21 protruding from the bottom of the flexible pad 20. Is in contact with the upper center of the dome switch 30, the end of the second protrusion 22 is in contact with the third terminal 53 and the fourth terminal 54 of the PCB (40). As described above, in the state where the dome switch 30 does not connect the first terminal 51 and the second terminal 52, the conductor 25 attached to the end of the second protrusion 22 is connected to the third terminal 53. By contacting the fourth terminal 54 with the second electrical signal is generated before the first electrical signal.

When the user further presses the key 10 in this state, the first protrusion 21 presses the dome switch 30 and deforms, while the dome switch 30 is connected to the first terminal 51 and the second terminal 52. ). As such, the first electrical signal is generated while the first terminal 51 and the second terminal 52 are connected.

As described above, in the present invention, by pressing one key 10 in two steps, first and second electrical signals are generated, respectively.

Second Embodiment

When the second embodiment is compared with the first embodiment, only the shape of the second protrusion formed on the flexible pad and the corresponding pattern of the third and fourth terminals of the PCB are different, and the other components are the same or similar. . Therefore, in the second embodiment described below, detailed descriptions of the same or similar components as those in the first embodiment will be omitted, and the same or similar reference numerals as those given in the first embodiment will be used instead of the description. .

In the drawings, FIG. 3A is a bottom view of a flexible pad of a mobile communication terminal according to a two-stage push type keypad structure according to a second embodiment of the present invention, and FIG. 3B corresponds to a conductor of the flexible pad shown in FIG. 3A. A plan view showing a pattern of a PCB.

As shown in FIG. 3A, at the bottom of the flexible pad 20 ′, two second protrusions 22 ′ are formed around the first protrusion 21 and the second protrusions 22 ′ are formed around the bottom of the flexible pad 20 ′. The shape is a semicircle shape, and the two second protrusions 22 'are formed to have a circular shape that surrounds the circumference of the first protrusion 21 apart from each other.

As shown in FIG. 3B, a ring-shaped first terminal 51 corresponding to the dome switch 30 and a second terminal located at the center of the first terminal 51 are formed on the pattern of the PCB 40 corresponding thereto. 52 and third and fourth terminals 53 'and 54' are formed in a semicircular shape to surround the outer periphery of the first terminal 51. As shown in FIG.

Here, as can be seen by comparing FIGS. 3A and 3B, the third terminal 53 ′ and the fourth terminal 54 ′ may include two second protrusions ′ so as to connect two second protrusions 22 ′. 22 ') are respectively located in correspondence with the opposite ends. Therefore, even in the second embodiment, when the user tilts the key, any of the second protrusions 22 'can connect the third terminal 53' and the fourth terminal 54 '. Herein, a conductor 25 'is attached to an end portion of the second protrusion 22' to energize the third terminal 53 'and the fourth terminal 54' to generate a second electrical signal.

Third Embodiment

The third embodiment also differs from the first embodiment in that only the shape of the second protrusion formed on the flexible pad and the pattern of the corresponding third and fourth terminals of the PCB are different, and the other components are the same or similar. . Therefore, the same or similar components as those in the first embodiment are given the reference numerals given in the first embodiment to replace the detailed description.

4A is a bottom view of a flexible pad of a mobile communication terminal in a two-stage push type keypad structure according to a third embodiment of the present invention, and FIG. 4B is a PCB corresponding to the conductor of the flexible pad shown in FIG. 4A. The top view which shows the pattern of.

As shown in FIG. 4A, four second protrusions 22 ″ are disposed on the bottom of the flexible pad 20 at intervals of 90 degrees around the first protrusion 21.

As shown in FIG. 4B, a ring-shaped first terminal 51 corresponding to the dome switch 30 and a second terminal positioned at the center of the first terminal 51 are formed in the pattern of the PCB 40 corresponding thereto. 52, a hook-shaped third terminal 53 "substantially enclosing the first terminal 51, and a hook-shaped substantially enclosing the third terminal 53" at the outer side of the third terminal 53 ". The fourth terminal 54 "is formed.

Here, as can be seen by comparing FIGS. 4A and 4B, each second protrusion 22 ″ is positioned so as to overlap the third terminal 53 ″ and the fourth terminal 54 ″ in close proximity. When any of the second protrusions 22 "from the four second protrusions 22" is connected to the third terminal 53 "and the fourth terminal 54" when the key 10 is inclined and pressed, the second protrusion Power is supplied by the conductor 25 " attached to the 22 " to generate a second electrical signal.

As described in detail above, the two-stage push type keypad structure of the mobile communication terminal of the present invention is configured to generate a different electrical signal at each step by pressing one key in two stages. By generating a plurality of electrical signals in one key, the number of electrical signals that can be generated increases even though the number of keys decreases. That is, even if the number of keys configured in the keypad of the mobile communication terminal is reduced, it is possible to sufficiently retain other kinds of electrical signals that can be input to the mobile communication terminal.

Therefore, the area of the keypad can be reduced, and accordingly, the size of the mobile communication terminal can be reduced.

In the above description, the technical concept of the keypad structure of the two-stage pressing method of the mobile communication terminal of the present invention has been described with the accompanying drawings, but this is by way of example and not by way of limitation.

Claims (5)

A plurality of keys exposed to the outside through the through-holes formed in the case, a printed circuit board (PCB) formed inside the case and having a first terminal and a second terminal corresponding to each key, the PCB and the A keypad structure of a mobile communication terminal including a flexible pad positioned between the case, and a switch located between the flexible pad and the PCB and elastically deformed by pressing the key and connecting the first terminal and the second terminal. To The flexible pad includes one or more protrusions protruding toward the PCB, A conductor fixed to an end of the protrusion, And a third terminal and a fourth terminal formed on the PCB corresponding to the protrusion, The conductor is connected to the third terminal and the fourth terminal prior to the switch connecting the first terminal and the second terminal by pressing the key of the two-stage pressing method of the mobile communication terminal. Keypad structure. The method of claim 1, The protrusions are formed at two positions of the flexible pad so as to be located at both sides of the switch, and the two third terminals corresponding to each of the protrusions are interconnected, and the two fourth terminals are also interconnected. Keypad structure of two-stage push method of communication terminal. The method of claim 1, The protruding portion has a semicircular shape, and two protruding portions are formed in the flexible pad in a circular shape, and the third terminal and the fourth terminal having a semicircular shape correspond to an end portion in which the two protruding portions face each other. A two-stage push type keypad structure of a mobile communication terminal, characterized in that located respectively. The method according to claim 1 or 2, The third terminal and the fourth terminal has the shape of a hook, the keypad structure of a two-stage pressing method of a mobile communication terminal, characterized in that the other terminal is located inside the one terminal away. The method according to claim 1 or 2, The third terminal and the fourth terminal corresponding to the protruding portion have a shape in which a plurality of branch portions are formed, and the branch portion of the fourth terminal is inserted between the branch portions of the third terminal. 2-stage keypad structure.

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