JP2010103767A - Portable electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable electronic device capable of preventing appearance from being spoiled by the fact that dust, etc. invading inside a key sheet is seen from a transparent part of a key top sheet. <P>SOLUTION: An elastic member 24 is provided between a housing 20 and the key sheet 50 housed inside the housing 20, and part of at least one of a slide sheet 54 and an arm 54a is pressed along the thickness direction of the slide sheet 54 by the elastic member 24. Namely, when the elastic member 24 pressurizes the slide sheet 54, the arm 54a provided in the slide sheet 54 regulates movement of the dust, etc. invading from an opening 56a to be exposed to the outside of the key sheet 50. In addition, when the elastic member 24 pressurizes the arm 54a, invasion of the dust, etc. from the opening 56a is prevented. Thus, the dust, etc. reaches a first signage part 58 and a second signage part 59 of the slide sheet 54, is visually recognized from the outside via the transparent part 51a provided in the key top sheet 51, and spoiling of the appearance can be prevented. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a portable electronic device that can be operated in an optimum orientation in accordance with the orientation of a notation portion.

  In a foldable portable terminal that is a portable electronic device connected so that two casings overlap each other, the user opens the foldable portable terminal around the first rotation axis of the connecting portion (vertically opened state). Thus, it is common to use a method of holding a first casing having an operation unit such as a numeric keypad by hand and viewing a second casing having a display unit.

  By the way, in recent years, portable terminals that receive and display television broadcasts have been put into practical use and have been widely used. However, in order to view a horizontally long television broadcast screen, it is easier to see a horizontally opened state in which the display unit is horizontally long. . In view of this, a structure has been proposed in which the second housing is rotated around a second rotation axis that is orthogonal to the first rotation axis (see, for example, Patent Document 1).

An example of a conventional folding portable terminal is shown in FIGS. 10 and 11. FIG.
The mobile terminal 100 in FIG. 10 includes three housings: a first housing 102 having an operation unit 101, a second housing 104 having a display unit 103, and a connecting unit 105. The connecting portion 105 is supported by a first rotation shaft 102 a provided in the first housing 102 so as to be rotatable in the direction of arrow A. By rotating the connecting portion 105 in the direction of arrow A, the second housing 104 can be opened in the first direction with respect to the first housing 102 to be in a vertically open state.

As shown in FIG. 11, the connecting portion 105 is provided with a second rotating shaft 104 a and supports the second housing 104 so as to be rotatable in the direction of arrow B. Therefore, by rotating the second casing 104 in the direction of arrow B, the second casing 104 can be opened in the second direction with respect to the first casing 102 to be in a laterally open state. it can.
JP 2006-22899 A

  By the way, in the portable terminal 100 capable of the vertical open state and the horizontal open state described above, when the display of the operation unit 101 is a display corresponding to the vertical open state or a display corresponding to only one of the horizontal open states, the other open state is displayed. There is a problem with the operability.

  Therefore, switching to a display corresponding to the open state can be considered. For example, the key sheet constituting the operation unit 101 is composed of a key top sheet that covers the surface, and a pusher sheet that presses the switch substrate by pressing the key top sheet, and between the key top sheet and the pusher sheet, It can be considered that a display sheet having a display corresponding to the open state is slidably provided.

  That is, the display sheet displays a vertical display corresponding to the vertical open state and a horizontal display corresponding to the horizontal open state, and slides the display sheet according to the vertical open state or the horizontal open state, and then presses the key. A display corresponding to the open state is visually recognized from the transparent portion provided on the top sheet. At this time, a predetermined space is provided between the key top sheet and the pusher sheet so that the display sheet can slide smoothly, and the arm portion provided on the display sheet is pulled out of the space, and the arm portion is The display sheet is slid by moving it.

  For this reason, the key top sheet and the pusher sheet are formed into a bag shape including a predetermined space except for a place where the arm portion of the display sheet is pulled out. There is a risk that dust and the like can be seen from the transparent part, and the appearance is impaired.

  The present invention has been made to solve the above-described problem, and can prevent dust and the like entering the key sheet from being seen from the transparent portion of the key top sheet, thereby preventing the appearance from being impaired. The purpose is to provide.

  The portable electronic device of the present invention includes a housing, a key sheet accommodated in the housing, and an elastic member provided between the housing and the key sheet. A key top sheet provided with a transparent portion at a predetermined position; a pusher sheet having a pressing protrusion on the back surface of the key top sheet; and provided between the key top sheet and the pusher sheet; A slide sheet that can reciprocate in a range from a first position to a second position with respect to the key top sheet and the pusher sheet, and connected to the slide sheet, between the key top sheet and the pusher sheet An arm portion exposed from an opening provided on the key top sheet side surface of the slide sheet, and the transparent portion at the first position. The first notation portion provided with a notation in a readable manner in the first direction and the notation provided in a second direction different from the first direction from the transparent portion at the second position are provided. The elastic member has a configuration for pressing a part of the slide sheet or the arm portion in the thickness direction of the slide sheet.

  Thereby, an elastic member is provided between the housing and the key sheet accommodated in the housing, and the elastic member presses a part of the slide sheet or the arm portion along the thickness direction of the slide sheet. That is, when the elastic member presses the slide sheet, the movement of dust or the like entering from the opening provided to expose the arm portion of the slide sheet to the outside of the key sheet is restricted. Moreover, when an elastic member presses an arm part, the penetration | invasion of dust etc. from opening is prevented. This prevents dust and the like from reaching the first notation portion and the second notation portion of the slide sheet and being visually recognized from the outside through the transparent portion provided on the key top sheet, thereby impairing the appearance. it can.

  In the portable electronic device of the present invention, the elastic member may be configured to press the end of the slide sheet on the opening side and be provided in a direction orthogonal to the reciprocating direction of the slide sheet. Have.

  Thereby, since the elastic member was provided in the direction orthogonal to the reciprocating direction of the slide sheet, the movement of dust or the like entering from the opening can be restricted.

  In the portable electronic device of the present invention, the elastic member presses the slide sheet via the key top sheet.

  Thereby, since an elastic member presses a slide sheet via a key top sheet, the key top sheet is not provided with a cutout for the elastic member. For this reason, it is possible to prevent dust and the like from entering the key sheet from the cutout for the elastic member.

  In the portable electronic device of the present invention, the elastic member may be pressed in a no-load state with respect to a gap dimension obtained by subtracting a thickness dimension of the slide sheet from a separation dimension between the key top sheet and the pusher sheet. It has a configuration with larger dimensions.

  As a result, the elastic member is always slid because the dimension of the elastic member in the unloaded state, that is, the thickness dimension is larger than the gap dimension obtained by subtracting the thickness of the slide sheet from the separation distance between the key top sheet and the pusher sheet. Press the sheet. For this reason, movement of dust etc. can be controlled.

  Further, in the portable electronic device of the present invention, the dimension in the pressing direction of the elastic member in the unloaded state is a clearance dimension obtained by subtracting the thickness dimension of the slide sheet from the separation dimension between the key top sheet and the pusher sheet. It has a configuration that does not exceed twice the size.

  Moreover, the portable electronic device of this invention has the structure by which the unevenness | corrugation was formed in the area | region pressed by the said elastic member in the said slide sheet or the said arm part.

  As a result, unevenness is formed in the area pressed by the elastic member in the slide sheet or arm portion, so that the resistance between the contact surfaces generated between the key top sheet or the pusher sheet when the slide sheet slides is reduced. Can do. For this reason, the slide sheet can be moved with a low load.

  And the portable electronic device of this invention has the structure by which the area | region pressed by the said elastic member at least in the said slide sheet or the said arm part is formed with the material with a smaller friction coefficient than another area | region.

  Furthermore, the portable electronic device of the present invention has a configuration in which a silicon-based coating layer is formed in a region pressed against the elastic member in the slide sheet or the arm portion.

  The portable electronic device of the present invention has a configuration in which a fluorine-based coating layer is formed in a region pressed against the elastic member in the slide sheet or the arm portion.

  As a result, since the silicon-based or fluorine-based coating layer is formed in the area pressed by the elastic member in the slide sheet, the contact surfaces generated between the key top sheet and the pusher sheet when the slide sheet slides Resistance can be reduced. For this reason, the slide sheet can be moved with a low load.

  In the present invention, when the elastic member presses the slide sheet, the movement of dust or the like entering from the opening provided to expose the arm portion of the slide sheet to the outside of the key sheet is restricted. Moreover, when an elastic member presses an arm part, the penetration | invasion of dust etc. from opening is prevented. This prevents dust and the like from reaching the first notation portion and the second notation portion of the slide sheet and being visually recognized from the outside through the transparent portion provided on the key top sheet, thereby impairing the appearance. A portable electronic device capable of being provided can be provided.

Hereinafter, portable electronic devices according to embodiments of the present invention will be described with reference to the drawings.
1 is a perspective view showing a vertically opened state of the portable electronic device according to the first embodiment of the present invention, FIG. 2 is a perspective view showing a horizontally opened state of the portable electronic device, and FIG. 3 is an exploded view of a lower housing and a key sheet. 4 is a perspective view of the slide sheet accommodated in the frame portion, FIG. 5 is a cross-sectional view at the position VI-VI in FIG. 3, FIG. 6 is a cross-sectional view showing another example of FIG. 5, and FIG. FIG. 8 is a front view showing the notation in the laterally open state.

As shown in FIGS. 1 and 2, the foldable portable terminal 10 as the portable electronic device according to the first embodiment includes a lower casing 20 and an upper casing 30 that constitute a casing. The casing 20 and the upper casing 30 are connected by a connecting portion 40 so as to be rotatable. An operation unit 21 having a four-way key 22 and a numeric keypad 23 for inputting characters and numbers is provided on the upper surface of the lower housing 20, and a display unit 31 is provided on the lower surface of the upper housing 30.
Therefore, in the closed state in which the lower housing 20 and the upper housing 30 are stacked, the operation unit 21 and the display unit 31 face each other.

  In the foldable portable terminal 10, as shown in FIG. 1, a vertically opened state that opens in the vertical direction with respect to the lower casing 20, and a lateral opening that opens in the lateral direction with respect to the lower casing 20 as shown in FIG. 2. The state is possible. The vertically opened state is a state in which the upper housing 30 is opened by rotating around the first rotating shaft 41 of the connecting portion 40, and is suitable, for example, for making a call or mail. The laterally open state is a state in which the upper housing 30 is rotated around the second rotation shaft 42 of the connecting portion 40 and is open, and is suitable for receiving a television or playing a game, for example.

As shown in FIG. 3, the upper surface 20a of the lower housing 20 is provided with an opening 20b at the center, and an elastic member 24 is attached to the inner surface of the opening 20b on the connecting portion 40 side. Inside the lower housing 20, a key sheet 50 that constitutes the operation unit 21 is provided at a predetermined position. The key sheet 50 includes a key top sheet 51, a slide sheet 54, a pusher sheet 53, and a dome switch 52 in a stacked state.
Accordingly, since the operation unit 21 of the key top sheet 51 is exposed from the opening 20b of the lower housing 20, the operation unit 21 can be operated.

  The key top sheet 51 is provided with a window-like transparent portion 51a at a position (predetermined position) corresponding to the four-way key 22 and the numeric keypad 23 for inputting characters and numbers so that the display of the slide sheet 54 can be seen. It has become. Note that the opening 20b of the lower housing 20 has a size such that the entire transparent portion 51a of the key top sheet 51 is exposed.

As shown in FIGS. 3 and 5, in the key top sheet 51, an opaque paint 51 c is applied to the surface of the transparent main body 51 b on portions other than the portions corresponding to the windows 22 a and 23 a in the operation portion 21. Thus, the transparent portion 51a is formed. Thereby, the transparent part 51a can be easily formed in the position corresponding to the windows 22a and 23a.
Accordingly, the transparent portion 51a is formed to be recessed by the thickness of the paint 51c.

The pusher sheet 53 is provided between the key top sheet 51 and the dome switch 52 and has a pressing projection (not shown) on the back surface.
The key top sheet 51 and the pusher sheet 53 are joined in a bag shape with a frame portion 56 having the same outer dimensions interposed therebetween, and have an internal space 56 b corresponding to the height of the frame portion 56. That is, the key top sheet 51 is bonded to the upper surface of the frame portion 56, and the pusher sheet 53 is bonded to the lower surface of the frame portion 56. A slide sheet 54 is accommodated in the internal space 56b, and the slide sheet 54 can reciprocate within a predetermined range along the surface direction with respect to the key top sheet 51 and the pusher sheet 53.
A part of the lower surface (back surface) of the frame portion 56 is provided with an opening 56a with a reduced thickness, and the internal space 56b of the frame portion 56 communicates with the outside.

  As shown in FIGS. 3 to 5, the slide sheet 54 is made of a plastic sheet that is thin but does not buckle, and has a convex follower mounting portion (arm portion) 54 a at one end. Yes. The follower mounting portion 54a protrudes outward from the opening 56a of the frame portion 56, and the follower mounting portion 54a is reciprocated by a follower moving mechanism 41a (see FIG. 1) provided on the first rotating shaft 41. A follower member 57 is attached.

  The slide sheet 54 moves only when the first rotation shaft 41 rotates, and when the first rotation shaft 41 does not rotate, that is, when the upper and lower housings 20 and 30 are closed and the upper housing 30 is moved. In the case of the lateral opening, the slide sheet 54 is urged by a spring member (not shown) and is not moved at the origin position (a position suitable for the lateral opening state).

Therefore, as the follower member 57 reciprocates according to how the upper housing 30 is opened (how the first rotation shaft 41 rotates), the slide sheet 54 is the key top sheet in the internal space 56b of the frame portion 56. The gap between 51 and the pusher sheet 53 is held so as to be movable.
That is, the slide sheet 54 moves in the direction A in FIG. 4 and is suitable for a vertically opened state when the upper housing 30 is used as a telephone with the first rotating shaft 41 as a center opening. 1 (see FIG. 7).
Further, when the upper housing 30 is opened sideways around the second rotation shaft 42 and used as a television receiver, the upper housing 30 is located at a second position (see FIG. 8) suitable for the horizontally opened state. The slide sheet 54 can reciprocate between the first position and the second position (predetermined range).

  As shown in FIG. 4, the surface (the upper surface in this case) on the key top sheet 51 side of the slide sheet 54 has a first direction (from the transparent portion 51 a of the key top sheet 51 in the first position (vertically opened state)). The first notation portion 58 (see FIG. 7) provided with a readable representation in the vertical direction in the vertically open state is different from the first direction from the transparent portion 51a in the second position (in the horizontally open state). There is provided a second notation portion 59 (see FIG. 8) in which a notation is provided so as to be readable in the second direction (vertical direction in the laterally open state).

As the first display unit 58, for example, a numeric keypad 23 array for a telephone set defined by the standard so that it can be used as a telephone in a vertically opened state, the first direction (the direction of arrow A in FIG. 1) is set up and down. Displayed in the direction.
Further, as the second display unit 59, for example, the first column is “1”, “2”, “3”, “4” from the left so that it can be easily used as a television broadcast receiver in the horizontally opened state. Are lined up. In the second column, “5”, “6”, “7”, “8” are arranged from the left. In the third column, “9”, “10”, “11”, and “12” are arranged. The direction of the numbers is displayed with the second direction (the direction of arrow B in FIG. 2) being up and down.
The first notation unit 58 and the second notation unit 59 constitute a notation unit for the slide sheet 54.

As shown in FIG. 7, when the interval in the slide direction of the slide sheet 54 of the transparent portion 51a of the key top sheet 51 is P, the first notation unit 58 and the second notation unit 59 are half of them. They are shifted by (P / 2).
In addition, it is the same position with respect to the direction orthogonal to the sliding direction. Thereby, the 1st notation part 58 and the 2nd description part 59 can be changed easily by shifting the slide sheet 54 only P / 2 to a slide direction.

  That is, as described above, in the first notation unit 58, the first direction (the direction of arrow A in FIG. 1) is set up and down with the numeric keypad 23 array for telephones defined by the standard so that it can be used as a telephone. It is displayed in the direction to do. Further, in the second notation unit 59, it is displayed in an orientation that is easy to use as a television broadcast receiver, with the second direction (the direction of arrow B in FIG. 2) being up and down. Then, the first notation unit 58 and the second notation unit 59 are provided adjacent to each other in the slide direction corresponding to the slide amount of the slide sheet 54.

  As shown in FIGS. 3 and 5, the elastic member 24 provided on the inner surface of the lower housing 20 presses the opening 56 a side end of the slide sheet 54 in the thickness direction via the key top sheet 51. For example, it is made of rubber or felt. The elastic member 24 has a length capable of pressing the entire width of the slide sheet 54, which is a direction orthogonal to the slide direction of the slide sheet 54. That is, the length of the elastic member 24 is longer than the entire width of the slide sheet 54 and is shorter than the width of the internal space 56 b of the frame portion 56.

  Further, the thickness (the dimension in the pressing direction) of the elastic member 24 slides from the separation dimension between the key top sheet 51 and the pusher sheet 53 (that is, the height of the internal space 56b of the frame portion 56) in an unloaded state. The sheet 54 is configured to be larger than the gap dimension obtained by subtracting the thickness dimension.

Therefore, the elastic member 24 presses and flexes the key top sheet 51 and presses the upper surface of the slide sheet 54 via the key top sheet 51. Accordingly, even if dust or the like enters from the opening 56a of the frame portion 56, the dust or the like exceeds the area where the key top sheet 51 is pressed by the elastic member 24, and the dust or the like is not included in the first notation portion 58 of the slide sheet 54. It is possible to prevent the second notation unit 59 from being reached.
The thickness dimension of the elastic member 24 is a gap dimension obtained by subtracting the thickness dimension of the slide sheet 54 from the separation dimension between the key top sheet 51 and the pusher sheet 53 (that is, the height of the internal space 56b of the frame portion 56). You may comprise with the magnitude | size which does not exceed 2 times. In this case, since it does not press too much, the sliding operation of the slide sheet 54 is not hindered.

In the area pressed by the elastic member 24 in the slide sheet 54, an unevenness 54b is formed, and the slide sheet 54 and the key top sheet 51 are in close contact (attached), or the slide sheet 54 and the pusher sheet 53 are in close contact. The slide sheet 54 can be smoothly slid.
Or as shown in FIG. 6, you may form the area | region pressed by the elastic member 24 in the slide sheet 54 with a material with a smaller friction coefficient than another area | region or another surface. For example, a silicon-based or fluorine-based coating layer 55 can be provided. Further, unevenness may be provided on the surface of the coating layer 55.

  As shown in FIGS. 3 and 5, a pusher sheet 53 is provided below the slide sheet 54, and a dome switch 52 is provided below the pusher sheet 53. The pusher sheet 53 is thin as a whole, and when the key top sheet 51 is pressed, the pusher sheet 53 is bent through the slide sheet 54, thereby denting the surface of the dome 52a of the dome switch 52 directly below. The inner surface is lowered and brought into contact with a comb-shaped electrode provided on the substrate 52b to realize key input.

  In addition, as shown in FIG. 3, an LED 52 c as a light emitting unit that is a backlight is provided in a gap between the dome 52 a in the dome switch 52. Accordingly, the notations 58 and 59 of the slide sheet 54 are illuminated by the light from the LED 52c provided on the back side of the pusher sheet 53 and can be seen from the transparent portion 51a of the key top sheet 51. The second notation portion 59 is easy to see and the appearance quality can be improved.

Next, the movement of the slide sheet 54 accompanying the opening and closing of the upper housing 30 and the display on the operation unit 21 will be described.
As shown in FIG. 7, when the upper housing 30 is opened vertically around the first rotation shaft 41 with respect to the lower housing 20, the first rotation shaft is rotated according to the rotation of the first rotation shaft 41. The follower moving mechanism 41 a provided in 41 moves the follower member 57 attached to the slide sheet 54 of the key sheet 50 to move the slide sheet 54.
Thereby, since the 1st notation part 58 can be seen through the transparent part 51a of the keytop sheet | seat 51, a telephone call or mail can be performed easily.
In this state, the second notation unit 59 is hidden behind the painted portion 51c of the key top sheet 51 (indicated by a broken line).

  At this time, since the elastic member 24 attached to the inner surface of the lower housing 20 presses the slide sheet 54 via the key top sheet 51, there is no gap between the slide sheet 54 and the key top sheet 51. I can't do it. For this reason, dust or the like that has entered between the slide sheet 54 and the key top sheet 51 from the opening 56 a of the frame portion 56 is prevented from entering beyond the pressing area by the elastic member 24.

Further, as shown in FIG. 8, when the upper housing 30 is opened laterally around the second rotation shaft 42 with respect to the lower housing 20, the first rotation shaft 41 does not rotate. The slide sheet 54 does not move. In the state where the upper and lower casings 20 and 30 are closed and in the horizontally opened state, the slide sheet 54 is at the origin position, and the second notation portion 59 is at a position where it can be seen through the transparent portion 51 a of the key top sheet 51.
For this reason, in the horizontally opened state, it is possible to easily perform television reception and game operation.
In this state, the first notation portion 58 is hidden behind the painted portion 51c of the key top sheet 51 (indicated by a broken line).

  Also in this case, since the elastic member 24 presses the slide sheet 54 via the key top sheet 51, there is no gap between the slide sheet 54 and the key top sheet 51, and the elastic member 24 is in close contact. For this reason, dust or the like that has entered between the slide sheet 54 and the key top sheet 51 from the opening 56 a of the frame portion 56 is prevented from entering beyond the pressing portion by the elastic member 24.

  As described above, according to the mobile terminal 10 described above, the elastic member 24 is provided between the key sheet 50 accommodated in the lower housing 20 and the inner surface of the lower housing 20, and the elastic member 24 causes the key top sheet 51 to be interposed therebetween. The slide sheet 54 is pressed along the thickness direction of the slide sheet 54. For this reason, the movement of dust or the like entering from the opening 56a of the frame 56 is restricted. As a result, dust or the like reaches the first notation portion 58 and the second notation portion 59 of the slide sheet 54 and is visually recognized from the outside through the transparent portion 51a provided on the key top sheet 51, thereby impairing the appearance. Can be prevented.

  In addition, since the elastic member 54 is provided longer than the entire width and corresponding to the side length of the slide sheet 54 and orthogonal to the reciprocating direction of the slide sheet 54, the movement of dust or the like entering from the opening 56 can be reliably controlled. it can.

  Further, since the elastic member 24 presses the slide sheet 54 via the key top sheet 51, it is not necessary to provide a cutout for the elastic member 24 in the key top sheet 51. For this reason, it is possible to reliably prevent dust and the like from entering the key sheet 50 from the notch for the elastic member 24.

  Further, the pressing direction dimension of the elastic member 24 in the unloaded state exceeds 100% with respect to the gap dimension obtained by subtracting the thickness dimension of the slide sheet 54 from the separation dimension between the key top sheet 51 and the pusher sheet 53. It is 200% or less. For this reason, the movement of dust and the like can be restricted and the reciprocating movement of the slide sheet 54 is not hindered.

  Further, since the unevenness 54b is formed in the area pressed by the elastic member 24 in the slide sheet 54, the resistance between the contact surfaces generated between the key top sheet 51 or the pusher sheet 53 when the slide sheet 54 slides is reduced. be able to. For this reason, the slide sheet 54 can be moved with a low load.

In addition, as the height of the convex shape on the surface of the unevenness 61, for example, it is effective to set it to 5 to 60 μm.
Further, as a material of the covering layer 55, a material obtained by mixing a medium with a material for UV curing is generally used.

Hereinafter, a portable electronic device according to a second embodiment of the present invention will be described with reference to the drawings.
FIG. 9 is an exploded perspective view of a lower casing and a key sheet of the portable electronic device according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the site | part common to the portable electronic device concerning 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  In the foldable portable terminal 10B as the portable electronic device according to the second embodiment, the elastic member 24B attached to the inner surface of the lower housing 20 presses the follower attachment part (arm part) 54a of the slide sheet 54. That is, the elastic member 24 </ b> B presses the key top sheet 51 so as to close the opening 56 a of the frame portion 56.

  This prevents dust and the like from entering through the opening 56 a of the frame portion 56, so that the dust reaches the first notation portion 58 and the second notation portion 59 of the slide sheet 54 and is provided on the key top sheet 51. It can be visually recognized from the outside through the transparent portion 51a and the appearance can be prevented from being impaired.

Corresponding to the pressing area of the elastic member 24B against the slide sheet 54, the unevenness 54b is formed in the follower mounting portion 54a of the slide sheet 54.
Thereby, the resistance of the contact surfaces which generate | occur | produce between the key top sheet | seat 51 or the pusher sheet | seat 53 at the time of slide of the slide sheet | seat 54 can be reduced, and the slide sheet | seat 54 can be moved with a low load.
Alternatively, by providing a silicon-based or fluorine-based coating layer 55 (indicated by a two-dot chain line in FIG. 9) on the follower mounting portion 54a of the slide sheet 54, which is a region pressed by the elastic member 24B, a key top sheet at the time of sliding. It is possible to move the slide sheet 54 with a low load by reducing the resistance between the contact surfaces generated with the 51 or the pusher sheet 53.

The key sheet and the portable electronic device of the present invention are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
For example, in each of the embodiments described above, the case where the unevenness 54 b is provided on the side surface of the key top sheet 51 of the slide sheet 54 has been described, but the unevenness 54 b may be provided on both the upper and lower surfaces of the slide sheet 54. The same applies to the covering layer 55.
The portable electronic device may be not only a mobile phone but also a portable electronic device such as a PDA, a notebook computer, and a game machine.

  The present invention is suitable for application to a portable electronic device that can be operated in an optimum orientation according to the orientation of the notation.

The perspective view which shows the vertically open state of the portable electronic device of 1st Embodiment concerning this invention. The perspective view which shows the laterally open state of the portable electronic device of 1st Embodiment concerning this invention. The disassembled perspective view of the key sheet of 1st Embodiment concerning this invention. Perspective view of key sheet Sectional drawing of the VV position in FIG. Sectional drawing which shows the modification of FIG. Front view showing notation in the vertically open state Front view showing notation in side-open state The disassembled perspective view of the key sheet of 2nd Embodiment concerning this invention. A perspective view showing a vertically opened state of a conventional folding mobile phone The perspective view which shows the side opening state of the conventional foldable mobile phone

Explanation of symbols

10 Foldable mobile terminal (mobile electronic device)
20 Lower housing (housing)
24 Elastic member 30 Upper housing (housing)
50 Key sheet 51 Key top sheet 51a Transparent part 53 Pusher sheet 54 Slide sheet 54a Follower attachment part (arm part)
54b Concavity and convexity 55 Cover layer 56a Opening 58 First notation part 59 Second notation part

Claims (9)

A housing,
A key sheet housed in the housing;
An elastic member provided between the casing and the key sheet,
The key sheet is
A key top sheet provided with a transparent portion at a predetermined position;
A pusher sheet having a pressing protrusion on the back surface with respect to the key top sheet;
A slide sheet provided between the key top sheet and the pusher sheet and capable of reciprocating in a range from a first position to a second position with respect to the key top sheet and the pusher sheet;
An arm portion connected to the slide sheet and exposed from an opening provided between the key top sheet and the pusher sheet;
On the surface on the key top sheet side of the slide sheet,
A first notation portion provided with a notation in the first position so as to be readable in the first direction from the transparent portion;
A second notation portion provided with a notation in a readable manner in a second direction different from the first direction from the transparent portion at the second position;
The elastic member is a portable electronic device that presses a part of the slide sheet or the arm portion in the thickness direction of the slide sheet.   2. The portable electronic device according to claim 1, wherein the elastic member presses an end of the slide sheet on the opening side and is provided in a direction orthogonal to a reciprocating direction of the slide sheet.   The portable electronic device according to claim 2, wherein the elastic member presses the slide sheet via the key top sheet. For the gap dimension obtained by subtracting the thickness dimension of the slide sheet from the separation dimension between the key top sheet and the pusher sheet,
The portable electronic device according to claim 2, wherein a dimension in a pressing direction of the elastic member in a no-load state is larger. The pressing direction dimension of the elastic member in an unloaded state is
5. The portable electronic device according to claim 4, wherein the portable electronic device has a size not exceeding twice a gap dimension obtained by subtracting a thickness dimension of the slide sheet from a separation dimension between the key top sheet and the pusher sheet. .   The portable electronic device according to any one of claims 1 to 4, wherein an unevenness is formed in a region pressed by the elastic member in the slide sheet or the arm portion.   The portable electronic device according to any one of claims 1 to 4, wherein at least a region pressed by the elastic member in the slide sheet or the arm portion is formed of a material having a smaller coefficient of friction than other regions.   The portable electronic device according to claim 7, wherein a silicon-based coating layer is formed in a region pressed by the elastic member in the slide sheet or the arm portion.   The portable electronic device according to claim 7, wherein a fluorine-based coating layer is formed in a region pressed by the elastic member in the slide sheet or the arm portion.

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