KR101553951B1 - Portable terminal - Google Patents

Abstract

The present invention relates to a semiconductor device comprising a patterned first conductor on a substrate, a second conductor patterned on the periphery of the first conductor, and a second conductor electrically connected to the second conductor, And a resilient support member for supporting the metal dome and elastically moving a supporting point of the metal dome during a pressing operation of the key, A first support portion supporting an edge of the dome, and a second support portion supported by the second conductor.

Description

[0001] PORTABLE TERMINAL [0002]

The present invention relates to a mobile terminal to which a dome switch having an improved click feeling is applied.

A portable terminal is a portable device that is portable and has one or more functions such as voice and video call function, information input / output function, and data storing function.

As the functions of the portable terminal are diversified, for example, the portable terminal has complicated functions such as photographing and photographing of a moving picture, reproduction of music or video file, reception of a game and broadcasting, and is implemented as a multimedia device .

Various new attempts have been made in terms of hardware or software to implement complex functions in such multimedia devices. For example, a user interface environment is provided for a user to easily and conveniently search for or select a function.

The portable terminal has input devices for inputting information by a user's operation, and these input devices may be embodied as a dome switch or a touch pad capable of receiving commands or information by a push or touch operation of a user, Or a jog system or a joystick system.

Of these various methods, the dome switch has a simple and reliable structure and is most commonly applied to a mobile terminal because it has the advantage that the user can feel the click feeling.

The present invention provides a structure of a dome switch capable of increasing the TRS when the metal dome is deformed to improve the click feeling.

According to an aspect of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: patterning a first conductor on a substrate; a second conductor patterned on an outer surface of the first conductor; A metal dome deformed by a pressing operation of the key and contacting the first conductor, and an elastic supporting member for supporting the metal dome and elastically moving a supporting point of the metal dome during a pressing operation of the key, The elastic support member includes a first support portion for supporting the edge of the metal dome and a second support portion supported by the second conductor.

At least one of the first and second conductors and the elastic supporting member may be disposed in a recess portion formed to have a certain depth on the substrate.

The elastic support member may be configured to have a modulus of elasticity smaller than that of the metal dome.

The present invention having such a structure provides a dome switch with improved click feeling by improving the TRS of the metal dome by implementing a structure for elastically moving the supporting point of the metal dome when the metal dome is deformed.

Further, the present invention can minimize the thickness increase of the terminal which can be caused by the application of the elastic supporting member by arranging the conductors or the elastic supporting member in the recess portion of the substrate.

Hereinafter, a portable terminal according to the present invention will be described in detail with reference to the drawings.

1 is a perspective view of an example of a mobile terminal 100 according to the present invention as viewed from the front.

The portable terminal of the present invention includes a first body 110 and a second body 120 that is slidable along at least one direction on the first body 110. In this embodiment, the slide type portable terminal is exemplified, but the present invention is not limited thereto, but can be applied to various types of portable terminals such as a bar type, a folder type, a swivel type, and a swing type.

The first body 110 may be referred to as a closed configuration in which the first body 110 and the second body 120 are overlapped with each other and the first body 110 may be referred to as a second body 120 ) May be referred to as an open configuration.

The mobile terminal operates mainly in the standby mode in the closed state, but the standby mode is also released by the user's operation. Then, the portable terminal 100 operates mainly in the communication mode in the open state, but is also switched to the standby mode by the operation of the user or a predetermined period of time.

The casing (housing, housing, cover, etc.) constituting the outer appearance of the first body 110 is formed by the front case 111 and the rear case 112. Various electronic components are embedded in the space formed by the front case 110 and the rear case 120. [

At least one intermediate case may be additionally disposed between the front case 111 and the rear case 112.

The cases may be formed by injection molding a synthetic resin, or may be formed to have a metal material such as stainless steel (STS) or titanium (Ti) or the like.

The display unit 113, the first sound output unit 114, the first image input unit 115, or the first operation unit 116 may be disposed in the first body 110, specifically, the front case 111. [

The display unit 113 includes a liquid crystal display (LCD) module, an OLED (Organic Light Emitting Diodes) module, etc. that visually express information, and the display unit 113 further includes a touch screen, It may also be possible to input information.

The first image output unit 114 may be implemented as a receiver or a speaker. The first image input unit 115 may be implemented as a camera module for capturing an image or a moving image of a user Can be implemented.

The first operation unit 116 receives a command for controlling the operation of the portable terminal according to an exemplary embodiment of the present invention.

The front case 121 and the rear case 122 may form the case of the second body 120, as in the case of the first body 110. [ The second operation unit 123 may be disposed on the front surface of the second body 120, specifically, the front case 121.

At least one of the front case 121 and the rear case 122 may include a third operating unit 124, an acoustical input unit 125, and an interface 126.

The first to third operating portions 116, 123, and 124 may be collectively referred to as a manipulating portion and may be employed in any manner as long as the user operates in a tactile manner.

For example, the operation unit may be implemented by a dome switch or a touch screen, a touch pad, or a wheel, a jog type, a joystick, or the like, As shown in FIG.

In terms of functions, the first operation unit 116 is for inputting commands such as start, end, and scrolling, and the second operation unit 123 is for inputting numbers, characters, symbols, and the like. In addition, the third operation unit 124 may operate as a hot-key for performing a special function such as activation of the first image input unit 15 or the like.

The sound input unit 125 may be implemented in the form of a microphone, for example, in order to receive voice, sound, etc. of the user.

The interface 126 is a path through which the portable terminal related to the present invention can exchange data with an external device. For example, the interface 126 may be a wired or wireless connection terminal for connecting to an earphone, a port for short range communication (for example, an IrDA port, a Bluetooth port, a wireless LAN port a wireless Lan port), or power supply terminals for supplying power to the portable terminal.

The interface 126 may be a card socket that accepts an external card such as a subscriber identification module (SIM) or a user identity module (UIM), a memory card for information storage, and the like.

A power supply 127 for supplying power to the portable terminal is mounted on the rear case 122 side. The power supply 127 may be detachably coupled, for example, for charging, as a rechargeable battery, for example.

2 is a rear perspective view of the portable terminal of FIG.

Referring to FIG. 2, a second image input unit 128 may be additionally mounted on the rear surface of the rear case 122 of the second body 120. The second image input unit 128 may have a photographing direction substantially opposite to that of the first image input unit 15 (see FIG. 1), and may be a camera having different pixels from the first image input unit 115.

For example, the first image input unit 115 has low pixels so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the second image input unit 128 photographs a general object, It is preferable to have a high pixel because it is often not transmitted.

A flash 129 and a mirror 130 are further disposed adjacent to the second image input unit 128. The flash 129 illuminates the subject when the subject is photographed by the second image input unit 128. The mirror unit 130 allows the user to illuminate the user's own face or the like when the user intends to take a picture of himself / herself (self-photographing) using the second image input unit 128.

And the second sound output unit 131 may be further disposed in the rear case 122. [

The second sound output unit 131 may implement a stereo function together with the first sound output unit 114 (see FIG. 1), and may be used for talking in a speakerphone mode.

Further, on one side of the rear case 122, a broadcast signal receiving antenna 132 may be disposed in addition to an antenna for communication. The antenna 132 may be installed to be detachable from the second body 120.

A part of the slide module 133 which slidably couples the first body 110 and the second body 120 is disposed on the rear case 112 side of the first body 110.

The other part of the slide module 133 may be disposed on the front case 121 side of the second body 120 and may not be exposed to the outside as in this figure.

In the above description, the second image input unit 128 and the like are disposed in the second body 120, but the present invention is not limited thereto. For example, at least one of the configurations 128 to 132 described as being arranged in the rear case 122, such as the second image input unit 128, is connected to the first body 110, mainly the rear case 112 It is also possible to mount it. In such a case, there is an advantage that the configuration (s) disposed in the rear case 112 in the closed state is protected by the second body 120. Further, the first image input unit 115 may be rotatably formed so that the second image input unit 128 can be photographed up to the second image input unit 128 even if the second image input unit 128 is not separately provided.

FIG. 3 is an exploded perspective view of a portable terminal according to an embodiment of the present invention, and FIG. 4 is a sectional view of the portable terminal according to line IV-IV of FIG.

The second operating portion 123 is implemented as a plurality of key buttons 123a which can be operated by pressing. The key buttons 123a are exposed to the outside through the through holes 123c formed in the front case 121. [

In this embodiment, the separately formed key buttons 123a are illustrated as being mounted on the second body 120. However, the second operation portion 123 may be formed as a 'keypad' in which the key buttons 123a are integrally formed Can also be implemented.

Between the front case 121 and the rear case 122, a printed circuit board 136 on which electronic parts for operating the portable terminal are mounted is mounted. Although the rigid PCB is used as the printed circuit board 136 in this embodiment, it is also possible to use a flexible circuit board (FPCB).

The printed circuit board 136 is mounted with dome switches 140 for generating a signal in accordance with a pressing operation of the key button 123a. On the rear surface of the key button 123a, pushing protrusions 123b for pushing the dome switches 140 are formed. The pushing protrusions 123b push the dome switches 140 when the key button 123a is pressed and the input signal is generated as the dome switch 140 deforms more than a predetermined amount.

Between the dome switches 140 of the printed circuit board 136 is mounted an illumination unit 138 for illuminating the key buttons 150. The illumination unit 138 is for illuminating numbers, characters, symbols, and the like displayed on the key buttons 150. A light emitting diode (LED) may be used to reduce the power loss and the manufacturing cost of the lighting unit 138.

The metal dome 143 of the dome switch 140 (see FIG. 7) can be attached to the printed circuit board 136 by an adhesive tape having a predetermined area, and the adhesive tape guides light emitted from the illumination unit 138 A light guiding film may be provided.

5A and 5B are cross-sectional views showing the structure and operating state of a dome switch in a general form. 6 is a graph showing the magnitude of the force acting on the metal dome according to the deformation of the metal dome.

5A and 5B, the dome switch 10 includes first and second conductors 12 and 13 patterned on a substrate 11 and first and second conductors 12 and 13 And 13 which are electrically connected to each other.

The first conductor 12 is formed at a position corresponding to the central portion of the metal dome 14. The second conductor 13 is formed in the form of a ring or band that surrounds the first conductor 12 and the metal dome 14 is supported by the second conductor 13.

When the metal dome 14 is pressed in the state of FIG. 5A, the metal dome 14 is deformed, and the central portion of the metal dome 14 moves as shown in FIG. 5B to be brought into contact with the first conductor 12. Accordingly, the first conductor 12 and the second conductor 13 are electrically connected to each other, thereby generating an input signal. In the following. The distance that the central portion of the metal dome 14 moves is referred to as a stroke.

The horizontal axis of the graph shown in FIG. 6 represents the stroke, and the vertical axis represents the magnitude of the force acting on the metal dome 14.

As shown in the graph of FIG. 6, the magnitude of the force acting on the metal dome increases substantially in proportion to the stroke, but decreases at a certain point. The magnitude of the force at such a point is referred to as a CP (Compressed Peak) value, and buckling occurs at the edge of the metal dome 14 at this point.

The force acting on the metal dome 14 due to the buckling phenomenon decreases and increases again at a certain point. This phenomenon occurs as the center portion of the metal dome 14 contacts the first conductor 12, and the magnitude of the force at such a point is referred to as a CL value.

As such, the magnitude of the force acting on the metal dome 14 varies with the amount of deformation of the metal dome 12, which is transmitted to the user in the form of a click. The concept of 'click ratio' can be introduced as a concept to numerically represent such click feeling. Here, 'click ratio' can be expressed by the following equation.

Generally, it is known that the larger the click ratio, the better the click feeling. In the meantime, various attempts have been made to improve the click ratio by improving the click ratio. The concept of 'TRS (Tactile Response Slope)' can be introduced as another concept for numerically representing click feeling. Here, 'TRS (Tactile Response Slope)' can be expressed by the following equation.

Here, S1 and S2 are the strokes corresponding to the CP value and the CL value, respectively. That is, TRS (Tactile Response Slope) represents the slope of the curve in the interval between S1 and S2.

Generally, it is known that as the TRS (Tactile Response Slope) increases, the click feeling improves.

Figs. 7A to 7C and Figs. 8A to 8C are conceptual diagrams showing a method for increasing the TRS.

Referring to FIGS. 7A to 7C, a method of increasing the TRS (Tactile Response Slope) is a method of forming the elastic member 123c at the end of the pushing projection 123b. Here, the elastic member 123c may be formed of a material such as rubber or silicone.

The elastic member 123c is compressed as the pushing projection 123b is lowered by the pushing action of the key button 123a and the elastic member 123c is restored to the original state and buckled at the edge of the metal dome 14 .

The following table measures the CP value, click rate, stroke, and TRS according to the length of the elastic member 123c.

0 (mm) 0.2 (mm) 0.4 (mm) 0.6 (mm) 0.8 (mm) 1.0 (mm) CP (gf) 210 212 218 223 225 226 Click ratio (%) 55.5 56.1 56.1 56.6 56.9 54.0 stroke (mm) 0.210 0.236 0.262 0.285 0.311 0.337 TRS 1209 1258 1547 2074 2954 3944

Referring to the above table, it can be seen that the TRS value is increased when the elastic member 123c is applied to the case where the elastic member 123c is not applied. In addition, it can be seen that as the length of the elastic member 123c is increased, the TRS value increases proportionally.

Referring to Figs. 8A to 8C, as another method for increasing the TRS, there is a method of elastically moving the supporting point of the metal dome 14. [

To this end, an elastic support member 150 elastically supporting the metal dome 14 is applied to the dome switch. Here, the elastic supporting member 150 is formed of a conductive material and may have a modulus of elasticity smaller than that of the metal dome 14.

The elastic supporting member 150 is compressed as the pushing projection 123b is lowered by the pushing action of the key button 123a and the resilient supporting member 150 is restored to the original state and the edge of the metal dome 14 Buckling occurs.

This method can realize a stable structure of the dome switch, and has an advantage that the structure of the TRS can be increased without greatly affecting the terminal thickness. Hereinafter, embodiments focusing on such a structure will be described.

Figs. 9A to 9C are cross-sectional views of a dome switch according to the first embodiment of the present invention, and Fig. 10 is a perspective view of the elastic member member shown in Fig.

The dome switch 140 related to the present embodiment includes a plurality of conductors 141 and 142 patterned on a printed circuit board 136 and a plurality of conductors 141 and 142 deformed by the pushing action of the key button 123a to electrically connect the conductors And a resilient supporting member 150 for supporting the metal dome 143 and elastically moving a supporting point of the metal dome 143 in the pressing operation of the key button 123a.

According to the present embodiment, the conductors 141 and 142 include a first conductor 141 located at a center portion and a second conductor 142 formed at an outer periphery of the first conductor 141. Here, the first and second conductors 141 and 142 may be formed on the upper surface of the printed circuit board 136.

The first and second conductors 141 and 142 may be disposed on the recess 137 formed in the printed circuit board 136 to have a predetermined depth. This structure is intended to minimize the influence of the application of the elastic supporting member 150 on the thickness of the portable terminal.

The metal dome 143 remains electrically connected to the second conductor 142. The metal dome 143 is pushed and deformed by the pushing protrusion 123b in response to the pressing operation of the key button 123a so that the metal dome 143 is contacted with the first conductor 141, 141 and 142 are electrically connected to each other.

As shown in Fig. 10, the present embodiment illustrates that the elastic supporting member 150 is implemented in the form of a washer having an inclined surface along the radial direction. However, the elastic supporting member 150 can be implemented in any form so long as it can elastically support the supporting point of the metal dome 143. [

The elastic support member 150 is disposed between the metal dome 143 and the second conductor 142 and is formed of a conductive material to electrically connect the metal dome 143 and the second conductor 142. The elastic support member 150 may include a first support portion 151 for supporting the edge of the metal dome 143 and a second support portion 152 supported by the second conductor 142.

The first support part 151 may be provided with a latching protrusion 154 for receiving a support point of the metal dome 143. This can be realized by forming a step on the upper surface of the elastic supporting member 150.

The second support portion 152 may be supported by the second conductor 142, but may be attached or fixed to the second conductor 142. In addition, the second support portion 152 may be formed of the same material as the second conductor 142, and may be integrally formed with the second conductor 142.

A through hole 153 may be formed in a central region of the elastic support member 150 to contact the center portion of the metal dome 143 with the first conductor 153 when the metal dome 143 is deformed.

An operation state of the dome switch 140 related to the present embodiment will be described as follows.

The elastic supporting member 150 is deformed in the direction of the upper surface of the printed circuit board 136 by the force that the pushing protrusion 123a presses the metal dome 143 as shown in FIG. In addition, as the metal dome 143 is continuously pressed, the central portion of the metal dome 143 is also deformed.

When the metal dome 143 is deformed by a predetermined amount or more, the elastic supporting member 150 is restored to the original state as shown in FIG. 9C. At this time, buckling occurs at the edge of the metal dome 143 due to the restoring force of the elastic supporting member 150 and the force applied by the pushing projection 123b. The operation of the dome switch 140 increases the TRS as described above.

11 is a graph comparing forces acting on the metal dome before and after application of the elastic supporting member. The left graph (I) of FIG. 11 shows the state before the application of the elastic supporting member 150, and the right graph (II) shows the state after the application of the elastic supporting member.

The following table is a graph comparing TRS values based on the graph of FIG.

Before application After applying CP (gf) 172 323 CL 125 172 Click Ratio (%) 27.2 46.7 TRS 1514 10512 S1 0.177 0.302 S2 0.208 0.316

Referring to the table, TRS is increased by about 6 times and the click rate is increased by more than 20% when the elastic support member 150 is applied.

12A to 12C are cross-sectional views of a dome switch according to a second embodiment of the present invention. In these drawings, the same reference numerals are given to the same components as those of the previous embodiment.

The dome switch 240 related to the present embodiment also includes a plurality of conductors 241 and 242 patterned on the printed circuit board 236 and a plurality of conductors 241 and 242 deformed by the pushing action of the key button 123a, A metal dome 243 for electrically connecting the metal dome 243 and the metal dome 243 and electrically connecting the metal dome 243 and the metal dome 243 to each other, (250).

The conductors associated with this embodiment also include first and second conductors 241 and 242, which in this embodiment are formed by forming a first conductor 241 on the top surface of the printed circuit board 236, And the body 242 is formed on the inside of the printed circuit board 236.

The elastic support member 250 may be embodied as a metal spring 250 that supports the edge of the metal dome 243. The spring 250 is electrically connected to the second conductor 242 within the printed circuit board 236.

A recess 237 having a predetermined depth may be formed on the printed circuit board 236. The recess 237 may be formed on the outer periphery of the first conductor 241 and the second conductor 242 may be disposed on the recess 237.

The spring 250 is formed in the form of a coil spring inserted into the recess portion 237 and has one end supported by the second conductor 242 and the other end supporting the supporting point of the dome switch 243. A ring-shaped metal member 256 may be additionally mounted between the supporting point of the dome switch 243 and the other end of the spring 250.

An operation state of the dome switch 240 related to the present embodiment will be described as follows.

As shown in FIG. 12B, the spring 250 is compressed by the pushing force of the pushing protrusion 123a to the metal dome 243. In addition, as the metal dome 243 is continuously pressed, the central portion of the metal dome 243 is also deformed.

When the metal dome 243 is deformed by a predetermined amount or more, the spring 250 is extended in a circular state as shown in FIG. 12C. At this time, buckling occurs at the edge of the metal dome 243 due to the restoring force of the spring 250 and the force applied by the pushing protrusion 123b. .

13 is a block diagram of a portable terminal according to the present invention.

13, a portable terminal according to an exemplary embodiment of the present invention includes a wireless communication module 181, operation units 116, 123 and 124, image input units 115 and 128, an acoustic input unit 125, a display unit 113, A sensing unit 186, an interface 126, a broadcast receiving module 185, a memory 184, a power supply unit 127, and a control unit 180.

The control unit 180 typically controls the overall operation of the portable terminal. For example, voice communication, data communication, video communication, and the like.

The wireless communication module 181 transmits / receives a wireless signal to / from a mobile communication base station through an antenna. A transmission unit 182 for transmitting and receiving voice data, character data, video data, and control data under the control of the control unit 190 and for modulating and transmitting a signal to be transmitted for this purpose; 183).

The operation units 116, 123, and 124 are configured as shown in FIG. 1, and provide the control unit 180 with key input data that the user inputs for controlling the operation of the terminal. The operation units 116, 123, and 124 include a dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The image input units 115 and 128 process image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame is converted into image data that can be displayed on the display unit 113 and output to the display unit 113.

The image frames processed by the image input units 115 and 128 are stored in the memory 184 under the control of the control unit 180 or transmitted to the outside through the wireless communication module 181. [

The sound input unit 125 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, and the like, and processes it as electrical voice data. The processed voice data is converted into a form that can be transmitted to the mobile communication base station via the wireless communication module 181 in the communication mode, and is output to the wireless communication module. In the record mode, the processed voice data is output to be stored in the memory 184. [

The sound input unit 125 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

The display unit 113 displays and outputs information processed in the portable terminal. For example, when the portable terminal is in the call mode, the control unit 180 displays a UI (User Interface) or a GUI (Graphic User Interface) associated with the call. If the portable terminal is in the video communication mode or the photographing mode, the control unit 180 displays and displays the photographed image, the UI, and the GUI. When the display unit 113 includes a touch screen, the display unit 113 is used as an input device in addition to the output device.

The sound output units 114 and 131 receive sound data received from the wireless communication module 181 under control of the control unit 180 in a call signal reception mode, a communication mode or a recording mode, a voice recognition mode, Converts the stored sound data and outputs it to the outside.

In addition, the sound output units 114 and 131 output sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the portable terminal. The sound output units 114 and 131 include a speaker, a receiver, a buzzer, and the like.

The sensing unit 186 senses the current state of the portable terminal, such as the open / close state of the portable terminal, the position of the portable terminal, whether or not the user touches the portable terminal, and generates a sensing signal for controlling the operation of the portable terminal. For example, if the portable terminal is in the form of a slide phone, it senses whether the slide phone is opened or closed, and outputs the sensing result to the controller 180 so that the operation of the terminal is controlled. And a sensing function related to whether or not the power supply 127 is powered on, whether the interface 126 is coupled to an external device, and the like.

The interface 126 may be any type of interface card such as a wired / wireless headset, an external charger, a wired / wireless data port, a card socket (e.g. a memory card, a SIM / UIM card) It serves as an interface with the device. The interface 126 receives data from an external device or receives power from the external device, transfers the data to each component in the portable terminal, or transmits data in the portable terminal to an external device.

The memory 184 may store a program for processing and controlling the control unit 180 and may have a function for temporarily storing input / output data (e.g., a phone book, a message, a still image, .

A program for controlling the operation of the portable terminal related to the present invention is stored in the memory 184

Such memory 184 includes the concept of a generally known hard disk, card type memory (e.g., SD or XD memory), flash memory, RAM, ROM, and the like.

The broadcast receiving module 185 receives broadcast signals transmitted through satellite or terrestrial waves and converts the received broadcast signals into broadcast data types that can be output to the sound output units 114 and 131 and the display unit 113 and outputs the broadcast data formats to the controller 180. In addition, the broadcast receiving module 185 receives additional data related to broadcasting (for example, an EPG (Electric Program Guide), a channel list, etc.). The broadcast data and the additional data converted by the broadcast receiving module 185 may be stored in the memory 184. [

The power supply unit 127 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The above-described portable terminal is not limited to the configuration and method of the embodiments described above, but all or some of the embodiments may be selectively combined so that various modifications may be made to the embodiments.

1 is a front perspective view of a mobile terminal according to an embodiment of the present invention;

2 is a rear perspective view of a portable terminal according to an embodiment of the present invention;

3 is an exploded perspective view of a portable terminal according to an embodiment of the present invention;

4 is a cross-sectional view of the portable terminal according to line IV-IV in FIG. 3;

5A and 5B are cross-sectional views showing the structure and operating state of a dome switch in general form.

6 is a graph showing the magnitude of the force acting on the metal dome in accordance with the deformation of the metal dome.

Figures 7A through 7C are conceptual diagrams illustrating an example of a method for increasing TRS.

8A to 8C are conceptual diagrams showing another example of a method for increasing TRS.

9A-9C are cross-sectional views of a dome switch in accordance with a first embodiment of the present invention.

10 is a perspective view of the elastic member shown in Fig.

11 is a graph comparing the forces acting on the metal dome before and after application of the elastic support member.

12A to 12C are cross-sectional views of a dome switch in accordance with a second embodiment of the present invention.

FIG. 13 is a block diagram of a portable terminal according to an embodiment of the present invention; FIG.

Claims (8)

A first conductor patterned on a substrate; A second conductor patterned on the periphery of the first conductor; A metal dome electrically connected to the second conductor and deformed by a pressing operation of the key to contact the first conductor; And And an elastic support member for supporting the metal dome and elastically moving a supporting point of the metal dome during a pressing operation of the key, The elastic support member A first support for supporting an edge of the metal dome; And And a second support portion supported by the second conductor, Wherein the elastic support member has a modulus of elasticity smaller than that of the metal dome, Wherein the first and second conductors are disposed on a recess portion formed on the substrate to have a predetermined depth. delete The method according to claim 1, Wherein the elastic supporting member comprises a through hole for contacting the center portion of the metal dome with the first conductor. The method according to claim 1, Wherein the elastic supporting member is a metal washer having an inclined surface along a radial direction. 5. The method of claim 4, Wherein the resilient supporting member is formed with a latching protrusion for receiving the supporting point of the metal dome. The method according to claim 1, Wherein the elastic supporting member is a metal spring that supports an edge of the metal dome. The method according to claim 6, Wherein the spring is disposed inside a recess portion formed to be recessed in the substrate. delete

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