KR20160115498A - Mobile terminal - Google Patents

Abstract

To minimize the manufacturing cost for combination between a key member and a housing of a mobile terminal, optimize the defect ratio and uniformity by replacing the bonding-type combination between the key member and a rubber unit, and resolving the noise and failure issues of the combination between the key member and the housing, the present invention provides a mobile terminal. The mobile terminal includes: a PCB unit on which a first dome and a second dome for generating electronic signal using pressure are mounted; a housing which includes a first opening for exposing the domes to the outside; a first key member which is inserted into the first opening to cover the first dome and includes a second opening for exposing the second dome to the outside; a second key member which is inserted into the second opening and covers the second dome; a first elastic unit which is combined with the first key member in the dual molding method and includes a first projection protruding towards the first dome; and a second elastic unit which is combined with the second key member in the dual molding method and includes a second projection protruding towards the second dome.

Description

[0001] MOBILE TERMINAL [0002]

The present invention relates to a mobile terminal including a structure of a physical key for reducing a production cost and optimizing a click rate of a user.

A terminal can be divided into a mobile terminal (mobile / portable terminal) and a stationary terminal according to whether the terminal can be moved. The mobile terminal can be divided into a handheld terminal and a vehicle mounted terminal according to whether the user can directly carry the mobile terminal.

In order to support and enhance the functionality of such terminals, it may be considered to improve the structural and / or software parts of the terminal.

The mobile terminal may be provided with a physical key for generating a control signal by applying pressure. A physical key can be divided into a key member directly touching an external physical object such as a user's finger, and a dome generating an electronic signal according to the deformation. Between the key member and the dome, a rubber portion for optimizing click sensitivity is provided. The rubber part is generally joined to the key part by an adhesive bonding method. When the key member and the rubber portion are bonded by the bonding method, it is necessary to work one by one in the production process, and it is not guaranteed that the adhesive is uniformly applied, and the defective rate may be increased according to the non- It can get worse.

On the other hand, both the key member and the housing to which the key member is fixed are made of a plastic material. When the space between the key member and the housing is wide, there is a problem such as generating noise or erroneous input due to the clearance. On the other hand, when the gap between the key member and the housing is excessively close, the click feeling is deteriorated. In addition, since the surfaces of the key member and the housing come in contact with each other, there is a risk that the entire surface of the key member and the housing will be pressed and stuck with the foreign matter when the foreign matter is introduced.

It is an object of the present invention to reduce the defect rate and to optimize the uniformity of the coupling in place of replacing the coupling of the key member and the rubber portion by the adhesive in the above-described problem of minimizing the production cost in the coupling between the key member and the housing.

It is also an object of the present invention to solve a problem such as a noise or a trouble which occurs in the coupling of the key member and the housing.

According to an aspect of the present invention, there is provided an electronic apparatus including a PCB having a first dome and a second dome mounted thereon to generate an electronic signal under pressure, the PCB is mounted, A first key member inserted into the first opening to cover the first dome and including a second opening through which the second dome is exposed to the outside, a housing including a first opening exposed to the first housing, A first elastic member which is inserted into the first key member and covers the second dome, a first elastic member coupled to the first key member by a double injection method and including a protrusion protruding in the first dome direction, And a second resilient portion coupled to the second resilient portion and including a protrusion protruding in the second dome direction.

According to another aspect of the present invention, the first key member includes a first fixing portion overlapping a boundary of the first opening, and the third key portion includes a third fixing portion that overlaps the boundary of the first opening portion, The mobile terminal further includes an elastic portion.

According to another aspect of the present invention, the third elastic portion is in contact with an inner circumferential side surface of the first opening of the housing.

According to another aspect of the present invention, the first dome is a pair of upper and lower dome symmetrically provided about the central axis of the second dome, wherein the first key member has a first And a support part protruding in the direction of the housing on the central axis line of the fixing part and the first fixing part.

According to another aspect of the present invention, the second key member includes a second fixing portion overlapping a boundary of the second opening, the first region of the second fixing portion is the second elastic portion, And the second region of the second fixing portion excluding the first region includes plastic.

According to another aspect of the present invention, there is provided a mobile terminal, wherein the second region is provided at both ends of the second key member.

According to another aspect of the present invention, there is provided a mobile terminal comprising: a seating part recessed in a shape corresponding to a second fixing part of the second key member.

According to another aspect of the present invention, there is provided a mobile terminal, wherein the first key member and the second key member are provided on a rear surface of the housing.

According to another aspect of the present invention, there is provided a mobile terminal, wherein the first dome generates an electronic signal for controlling a volume, and the second dome generates an electronic signal for controlling a power source.

Effects of the mobile terminal and the control method according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, the production unit cost for the engagement of the key member and the rubber portion can be reduced.

According to another embodiment of the present invention, the click rate of the key member can be optimized.

According to another embodiment of the present invention, it is possible to minimize the noise generated due to the coupling of the key member and the housing, and to minimize the defects due to the inflow and attachment of foreign matter.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

1 and 2 are conceptual diagrams showing an example of a mobile terminal according to the present invention in different directions.
FIG. 3 is a perspective view illustrating a rear case and a PCB of a mobile terminal according to the present invention before coupling.
4 is a cross-sectional view in AA 'direction of a portion of the mobile terminal of FIG. 3;
FIG. 5 is a front view of a key member according to the present invention before engagement.
FIG. 6 is a rear view of the key member according to the present invention before engagement.
Figure 7 relates to the prior art relating to the present invention.
Figure 8 compares the click rate for the present invention versus the prior art.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

The mobile terminal described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate PC A tablet PC, an ultrabook, a wearable device such as a smartwatch, a smart glass, and a head mounted display (HMD). have.

However, it will be appreciated by those skilled in the art that the configuration according to the embodiments described herein may be applied to fixed terminals such as a digital TV, a desktop computer, a digital signage, and the like, will be.

1 and 2 are conceptual diagrams showing an example of a mobile terminal according to the present invention in different directions.

Referring to FIG. 1, the disclosed mobile terminal 100 includes a bar-shaped terminal body. However, the present invention is not limited thereto and can be applied to various structures such as a folder type, a flip type, a slide type, a swing type, and a swivel type in which a watch type, a clip type, a glass type or two or more bodies are relatively movably coupled . A description of a particular type of mobile terminal, although relevant to a particular type of mobile terminal, is generally applicable to other types of mobile terminals.

Here, the terminal body can be understood as a concept of referring to the mobile terminal 100 as at least one aggregate.

The mobile terminal 100 includes a case (for example, a frame, a housing, a cover, and the like) that forms an appearance. As shown, the mobile terminal 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in the inner space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.

A display unit 151 is disposed on a front surface of the terminal body to output information. The window 151a of the display unit 151 may be mounted on the front case 101 to form a front surface of the terminal body together with the front case 101. [

In some cases, electronic components may also be mounted on the rear case 102. Electronic parts that can be mounted on the rear case 102 include detachable batteries, an identification module, a memory card, and the like. In this case, a rear cover 103 for covering the mounted electronic components can be detachably coupled to the rear case 102. Therefore, when the rear cover 103 is separated from the rear case 102, the electronic parts mounted on the rear case 102 are exposed to the outside.

Referring to FIG. 2, when the rear cover 103 is coupled, a side portion of the rear case 102 can be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the engagement. Meanwhile, the rear cover 103 may be provided with an opening for exposing the camera 121b and the sound output unit 152b to the outside.

These cases 101, 102, and 103 may be formed by injection molding of synthetic resin or may be formed of metal such as stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

The mobile terminal 100 may be configured such that one case provides the internal space, unlike the above example in which a plurality of cases provide an internal space for accommodating various electronic components. In this case, a unibody mobile terminal 100 in which synthetic resin or metal is connected from the side to the rear side can be realized.

Meanwhile, the mobile terminal 100 may include a waterproof unit (not shown) for preventing water from penetrating into the terminal body. For example, the waterproof portion is provided between the window 151a and the front case 101, between the front case 101 and the rear case 102, or between the rear case 102 and the rear cover 103, And a waterproof member for sealing the inside space of the oven.

1, the mobile terminal 100 is provided with a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, an optical output unit 154 First and second cameras 121a and 121b, first and second operation units 123a and 123b, a microphone 122, an input key 260, and the like.

1 and 2, a display unit 151, a first sound output unit 152a, a proximity sensor 141, an illuminance sensor 142, an optical output unit (not shown) A second operation unit 123b and a microphone 122 are disposed on a side surface of the terminal body and an input key 260, a second sound output unit 152b, and a second camera 121b.

However, these configurations are not limited to this arrangement. These configurations may be excluded or replaced as needed, or placed on different planes. For example, the first operation unit 123a may not be provided on the front surface of the terminal body, and the second sound output unit 152b and the input key 260 may be provided on the side of the terminal body, .

The first and second operation units 123a and 123b may be collectively referred to as a manipulating portion as an example of a user input unit 123 operated to receive a command for controlling the operation of the mobile terminal 100 have. The first and second operation units 123a and 123b can be employed in any manner as long as the user is in a tactile manner such as touch, push, scroll, or the like. In addition, the first and second operation units 123a and 123b may be employed in a manner that the user operates the apparatus without touching the user through a proximity touch, a hovering touch, or the like.

In this figure, the first operation unit 123a is a touch key, but the present invention is not limited thereto. For example, the first operation unit 123a may be a mechanical key or a combination of a touch key and a touch key.

The contents input by the first and second operation units 123a and 123b can be variously set. For example, the first operation unit 123a receives a command such as a menu, a home key, a cancellation, a search, and the like, and the second operation unit 123b receives a command from the first or second sound output unit 152a or 152b The size of the sound, and the change of the display unit 151 to the touch recognition mode.

Meanwhile, an input key 260 may be provided on the rear surface of the terminal body as another example of the user input unit 123. [ The input key 260 is operated to receive a command for controlling the operation of the mobile terminal 100, and input contents may be variously set. For example, commands such as power on / off, start, end, scrolling, and the like, the size adjustment of the sound output from the first and second sound output units 152a and 152b, And the like can be inputted. The input key 260 may be implemented as a touch input, a push input, or a combination thereof. In the present invention, it is assumed that a push key is a mechanical key.

The input key 260 may be disposed so as to overlap the front display unit 151 in the thickness direction of the terminal body. For example, the input key 260 may be disposed at the upper rear portion of the terminal body so that the user can easily operate the terminal body by using the index finger when the user holds the terminal body with one hand. However, the present invention is not limited thereto, and the position of the input key 260 may be changed.

When a rear input unit is provided on the rear surface of the terminal body, a new type of user interface using the rear input unit can be realized. When the first operation unit 123a is not disposed on the front surface of the terminal body in place of at least a part of the functions of the first operation unit 123a provided on the front surface of the terminal body, The display unit 151 may be configured as a larger screen.

Meanwhile, the mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing the fingerprint of the user, and the controller 180 may use the fingerprint information sensed through the fingerprint recognition sensor as authentication means. The fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.

The microphone 122 is configured to receive the user's voice, other sounds, and the like. The microphone 122 may be provided at a plurality of locations to receive stereophonic sound.

The interface unit 195 is a path through which the mobile terminal 100 can be connected to an external device. For example, the interface unit 195 may include a connection terminal for connection with another device (e.g., earphone, external speaker), a port for short-range communication (e.g., an infrared port (IrDA Port), a Bluetooth port A wireless LAN port, or the like), or a power supply terminal for supplying power to the mobile terminal 100. The interface unit 195 may be implemented in the form of a socket for receiving an external card such as a SIM (Subscriber Identification Module) or a UIM (User Identity Module) or a memory card for storing information.

Referring to FIG. 2, a second camera 121b may be disposed on a rear surface of the terminal body. In this case, the second camera 121b has a photographing direction which is substantially opposite to that of the first camera 121a.

The second camera 121b may include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix form. Such a camera can be named an 'array camera'. When the second camera 121b is configured as an array camera, images can be taken in various ways using a plurality of lenses, and a better quality image can be obtained.

The flash 124 may be disposed adjacent to the second camera 121b. The flash 124 shines light toward the subject when the subject is photographed by the second camera 121b.

And a second sound output unit 152b may be additionally disposed in the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a and may be used for implementing a speakerphone mode in a call.

The terminal body may be provided with at least one antenna for wireless communication. The antenna may be embedded in the terminal body or formed in the case. For example, an antenna constituting a part of the broadcast receiving module 111 (see FIG. 1) can be configured to be able to be drawn out from the terminal body. Alternatively, the antenna may be formed in a film type and attached to the inner surface of the rear cover 103, or a case including a conductive material may be configured to function as an antenna.

The terminal body is provided with a power supply unit 190 (see FIG. 1) for supplying power to the mobile terminal 100. The power supply unit 190 may include a battery 191 built in the terminal body or detachable from the outside of the terminal body.

The battery 191 may be configured to receive power through a power cable connected to the interface unit 160. In addition, the battery 191 may be configured to be wirelessly chargeable through a wireless charger. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

The rear cover 103 is configured to be coupled to the rear case 102 so as to cover the battery 191 to restrict the release of the battery 191 and to protect the battery 191 from external impact and foreign matter . When the battery 191 is detachably attached to the terminal body, the rear cover 103 may be detachably coupled to the rear case 102.

The mobile terminal 100 may be provided with an accessory that protects the appearance or supports or expands the function of the mobile terminal 100. [ One example of such an accessory is a cover or pouch that covers or accommodates at least one side of the mobile terminal 100. [ The cover or pouch may be configured to interlock with the display unit 151 to expand the function of the mobile terminal 100. Another example of an accessory is a touch pen for supplementing or extending a touch input to the touch screen.

3 is a perspective view of a rear case and a PCB 210 of the mobile terminal 100 (see FIG.

The PC unit 210 can mount an electronic component used in the mobile terminal 100 (see FIG. 1). The electronic component may include a dome 230 that receives an input from an externally exposed key member 260 and generates an input signal.

The PC unit 210 can be mounted in the housing 120 forming the appearance of the mobile terminal 100 (see FIG. 1), that is, in the combination of the front case 101 (see FIG. 1) and the rear case 102 .

Meanwhile, a plurality of the dome 230 can be defined, and a part of the dome 230 can be defined as a first dome 231 and the remaining part can be defined as a second dome 232. In particular, the first dome 231 may generate an electronic signal for controlling the volume, and the second dome 232 may generate an electronic signal for controlling the power source. The first dome 231 for generating the electronic signal for controlling the volume may be in particular two and the second dome 232 for generating the electronic signal for controlling the power source may be provided in particular.

The two first domes 231 may be symmetrically arranged in the vertical direction of the second domes 232. Although the first dome 231 and the second dome 232 are described in the present invention, the first dome 231 is not limited to the first dome 231, And the second dome 232 may be different from each other, and the electronic signal generated by the pressure is not limited to the power supply or the volume signal but may be a different signal if necessary.

The first key member 240 and the second key member 250 are all referred to as a key member 260 for convenience of explanation and the dome 231 including both the first dome 231 and the second dome 232 230).

The first opening 222 is formed in the rear case 102 of the housing 120 such that the first dome 231 and the second dome 232 mounted on the PCB 210 are exposed to the outside, (231) and the second dome (232).

Or a separate auxiliary coupling portion 221 to which the key member 260 is coupled to easily couple the key member 260 in the manufacturing process of the mobile terminal 100, The coupling module of the coupling part 221 may be fixed to the rear case 102 of the housing 120 through a screw or the like.

In the present description, the plurality of dome 230 and the first opening 222 are described on the assumption that the plurality of dome 230 and the first opening 222 are on the rear surface, but the present invention is not limited thereto. And at least one of the side surface and the back surface. If the key member 260 is provided on the front surface of the housing 120, that is, on the front surface of the mobile terminal 100, the first dome 231 and the second dome 231 232, respectively.

The first key member 240 may be inserted into the first opening 222 to cover the first dome 231 with a member for transmitting pressure to the first dome 231. The first pressing part 241 of the first key member 240 is the same as the area of the first opening 222 and the first fixing part 242 formed around the first pressing part 241 is the same as the first pressing part 241, May overlap with the boundary of the second electrode 222. The first fixing portion 242 can form a step in the inner side direction of the mobile terminal 100 at the first pressing portion 241. The first fixing part 241 prevents the first pressing part 241 from being separated from the first opening part 222 in the plane direction and the first fixing part 242 prevents the first key part 240 from passing through the first opening part 222 And can prevent the mobile terminal 100 from deviating vertically outward.

4 is a cross-sectional view taken along the line A-A 'of a portion of the mobile terminal of FIG.

The key member 260 and the auxiliary coupling portion 221 can be fixed by hooking the protrusion provided on the key member 260 and the depression provided at the position corresponding to the protrusion on the auxiliary coupling portion 221 have. Since the protrusion provided on the key member 260 is provided on the center axis of the key member 260, even if one of the upper and lower ends of the key member 260 is pressed, the key member 260 is prevented from tilting. . The key member 260 is coupled to the housing 120 (see FIG. 3) instead of the auxiliary coupling portion 221. However, the key member 260 may be coupled to the housing 120 You may. At this time, the coupling structure may also be similar.

5 shows a front view of the key member 260 before engagement according to the present invention.

The first key member 240 may have a second opening 243 to expose the second dome 232 (see FIG. 3) to the outside.

The second key member 250 is inserted into the second opening 243 to cover the second dome 232 (see FIG. 3) with a member for transmitting pressure to the second dome 232 (see FIG. 3) . The second pressing part 251 of the second key member 250 is the same as the area of the second opening part 243 and the second fixing part 252 formed around the second pressing part 251 is the same as the area of the second opening part 243. [ (243). ≪ / RTI > The second fixing portion 252 can form a step in the inner side direction in the second pressing portion 251. The second fixing part 252 prevents the second key part 250 from moving in the vertical direction of the second opening part 243 And can prevent the detachment to the outside.

FIG. 6 is a rear view of the key member according to the present invention before engagement.

The first key member 240 may have a shape corresponding to the second fixing portion 252 of the second key member 250 so that the second key member 250 can be easily engaged with the first key member 240. [ As shown in FIG.

The key member 260 can be manufactured through an injection molding process. The material of the key member 260 may include plastic. When the key member 260 is made of plastic, it can have a rigidity higher than a specific strength. Referring to FIG. 3, the material of the housing 120 including the first opening 222 into which the first key member 240 is inserted may also include plastic.

Figure 7 relates to the prior art relating to the present invention.

The integral rubber member 410 may be provided between the first key member 240 and the first dome 231 (see FIG. 3) and between the second key member 250 and the second dome 232 (see FIG. 3) As shown in FIG. 3) and the second dome 232 (see Fig. 3), respectively, to the first key member 240 or the second key member 250, . The integral rubber part 410 may be coupled to the inner side surfaces of the first key member 240 and the second key member 250 through an adhesive. The integrated rubber part 410 may be separately provided in each of the first key member 240 and the second key member 250, but it is usually provided integrally with each other for the sake of material cost and process convenience. The integrated rubber part 410 includes an engagement opening 411 corresponding to a protrusion provided on the key member 260 so as to be disposed at an appropriate position in order to prevent the rubber part 410 from being easily separated from the key member 260 in the process of bonding . The integral rubber portion 410 may include a projection 412 having an appropriate area at a position corresponding to the dome 230 (see FIG. 3).

The integral rubber portion 410 is provided between the dome 230 (see FIG. 3) and the key member 260, thereby providing a user with a click feeling. The click feeling refers to a degree of natural and gentle pressing when the user presses the key member 260 through the pressure, while being able to recognize that the key 260 is pressed.

Referring again to FIG. 6, the material of the first elastic part 310 may be rubber. 7, the first elastic part 310 may be coupled to the first key member 240 in a double injection manner. The first elastic part 310 includes a first protrusion 341 protruded in the direction of the first dome 231 (see FIG. 3) to the inner surface of the first key member 240 .

The first elastic portion 310 may be limited to the rear region of the first pressing portion 241 (see FIG. 5) and may not be included in the rear region of the first fixing portion 242 (see FIG. 5). A region of the first elastic portion 310 excluding the first protrusion 341 may be formed on the same plane as the rear surface of the first key member 240. The first protrusion 341 is engaged with the first dome 231 when the first key member 240 is coupled between the housing 120 and the first dome 231 See Fig. 3).

The material of the second elastic portion 320 may also be rubber. The second elastic portion 320 may be coupled to the second key member 250 in a double injection manner. The second elastic portion 320 may include a second protrusion 342 protruded in the direction of the second dome 232 (see FIG. 3) to the inner surface of the second key member 250.

5, the first area 2521 of the second fixing part 252 becomes the second elastic part 320 (see FIG. 5), and the first area 2521 of the second fixing part 252 The second region 2522 may be a region of a plastic material to be injected together with the second pressing portion 251. [ 5) of the first area 2521 overlaps with the boundary of the second opening 243 of the first key member 240 as described above, but the second elastic part 320 of the first area 2521 Since the elastic part 320 is made of a rubber material, friction and noise due to repetition of contact and separation due to vibrations of the mobile terminal 100 between the first key member 240 and the second key member 250 can be minimized have. However, when the second fixing part 252 is entirely made of a rubber material, the second key member 250 may be detached from the second opening part 243 of the first key member 240 and deviated vertically outward. The second area 2522 of the plastic prevents this problem and prevents the second key member 250 from being separated from the second opening 243.

The rubber injection area in the first key member 240 is the minimum area including the protrusion, while the plastic injection area in the second key member 250 can be the minimum.

The third elastic portion 330 may be coupled to the first fixing portion 242 in a circumferential direction of the first opening 222 to be coupled to the first fixing portion 242. The third elastic portion 330 blocks direct contact of the first fixing portion 242 of the plastic material with the inner side surface of the first opening 222 (see FIG. 3) of the housing 120 (see FIG. 3) It is possible to prevent noise from being generated. Further, since the first fixing portion 242 and the housing 120 can be further brought closer to each other, it is possible to prevent the occurrence of clearance and increase the click feeling.

When the periphery of the first fixing portion 242 and the first opening portion 222 (see FIG. 3) are in direct contact without the third elastic portion 330, the surface is in contact with the surface, If it hardens, it may be fixed to a large area, which may cause problems. When there is the third elastic part 330, only a very narrow area or a portion of the line area is brought into contact with the first elastic part 330, thereby reducing the possibility of such a problem. The circumference of the first opening 222 (see FIG. 3) of the third elastic portion 330 and the first fixing portion 242 may be spaced by about 0.05 mm.

The third elastic part 330 may be provided at four positions, that is, the upper and lower sides and the left and right sides of the first fixing part 242 of the first key member 240. Or may be provided only on both sides due to space limitations with other parts.

The support portion 245 may protrude in the direction of the housing 120 on the central axis line of the first key member 240 where the second dome 232 (see FIG. 3) is located. The support portion 245 may contact the inner surface of the first opening 222 of the housing 120 (see FIG. 3) and serve as a contact point of the lever when the upper or lower region of the first key member 240 is pushed have. That is, when the upper part of the first pressing part 241, which is a region above the central axis, is pressed, the upper end of the first key member 240 is inserted into the inside of the mobile terminal 100 (see FIG. 1) 240 may be inclined to the outside of the mobile terminal 100 (see FIG. 1) so as not to interfere with transmission of the click feeling. On the contrary, when the lower portion of the first pressing portion 241, which is a region below the central axis, is pressed, the upper end of the first key member 240 is moved outward of the mobile terminal 100 (see FIG. 1) May be inclined to the inside of the mobile terminal 100 (see FIG. 1) so as not to interfere with the transmission of the click feeling.

In the case of using the double injection elastic part, it is possible to save about half the material and production cost as compared with the case of using the integral rubber part 410.

Figure 8 compares the click rate for the present invention versus the prior art.

The click-through rate is the degree to which a user clicks on a keystroke, 40-50% being the most ideal. The click rate for the upper volume key, the lower volume key, and the power key was 35.8%, 37.2%, and 41.3%, respectively, when the integral rubber part 410 was used, and 51.1%, 49.8%, and 53.1% %, All of which have a high CTR.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The foregoing detailed description should not be construed in all aspects as limiting and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: mobile terminal 120: housing
210: PCB part 221: auxiliary coupling part
222: first opening 230: dome
231: first dome 232: second dome
240: first key member 241: first pressing member
242: first fixing portion 243: second opening
244: seat portion 246:
250: second key member 251: second pressing portion
252: second fixing portion 2521: first region
2522: second region 260: key member
310: first elastic part 320: second elastic part
330: third elastic portion 341: first projection
342: second projection 410: integral rubber part
411: integral rubber part opening part 412: integral rubber part projection

Claims (8)

A PCB having a first dome and a second dome mounted thereon for generating an electronic signal by pressure;
A housing having the PCB mounted thereon and having a first opening through which the plurality of dome are exposed to the outside;
A first key member inserted into the first opening to cover the first dome and including a second opening through which the second dome is exposed to the outside;
A second key member inserted into the second opening and covering the second dome;
A first elastic part coupled to the first key member in a dual injection manner and including a first projection projecting in the first dome direction; And
And a second protruding portion coupled to the second key member in a double injection manner and including a second protrusion protruding in the second dome direction. The method according to claim 1,
The first key member may include a first fixing part that overlaps the boundary of the first opening and a third elastic part that is coupled to the first fixing part in a circumferential direction of the first opening and coupled to the first fixing part. . The method according to claim 1,
And the first dome is two upper and lower dome symmetrically provided about a center axis of the second dome,
The first key member includes: a first fixing portion overlapping the boundary of the first opening; And
Further comprising a support portion protruding in the direction of the housing on the central axis line of the first fixing portion. The method according to claim 1,
And the first dome is two upper and lower dome symmetrically provided about a center axis of the second dome,
The first key member includes: a first fixing portion overlapping the boundary of the first opening; And
Further comprising a support portion protruding in the direction of the housing on the central axis line of the first fixing portion. 5. The method of claim 4,
And the second region is provided at both ends of the second key member. 5. The method of claim 4,
Wherein the first key member comprises:
Further comprising: a seating part recessed in a shape corresponding to the second fixing part of the second key member. The method according to claim 1,
Wherein the first key member, the second key member, the first dome, and the second dome are provided on a rear surface of the housing. The method according to claim 1,
The first dome generates an electronic signal for controlling the volume,
And the second dome generates an electronic signal for controlling the power supply.

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