JP2008294804A - Mobile electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile electronic device having light shielding property and anti-static measure by applying a light shielding member comprising a non-conductive material on a region including all regions where a key operation part is arranged, at a sheet member. <P>SOLUTION: A mobile telephone 1 includes an operation part side case 2 comprising key holes 13a and 15a, a function setting operation key member 13b with at least a part being translucent and a non-translucent annular key member 16b which are arranged to be exposed outside from the key holes 13a and 15a, a key sheet 40C supporting the function setting operation key member 13b and annular key member 16b, an LED light-emitting part 55 arranged below the key sheet 40C, and a light shielding member 45 which includes all regions opposed to the annular key member 16b of the key sheet 40C, and is so applied that the outer edge extends up to the position opposed to the end part 130 on the annular key member 16b side of the function setting operation member 13b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a portable electronic device such as a cellular phone.

  Conventionally, in order to display functions and numbers assigned to the key operation unit more clearly, a translucent part having a shape such as a number is formed at the pressing part of the key operation unit and disposed inside the casing. There has been disclosed a portable electronic device that transmits light emitted from a light emitting unit through a light transmitting unit such as numerals formed on a key operation unit.

  However, when the light emitted from the light emitting unit arranged inside the housing leaks from a portion different from the light transmitting unit formed in the key operation unit, the above display effect is reduced by half and the user There was a problem that the impression of became worse.

In contrast, a key top as a key operation unit formed of a translucent resin and a keypad to which the keytop is joined, and a non-periphery around a region where the keytop is disposed in the keypad. There has been proposed a portable electronic device in which light is prevented from leaking from around the key top by applying translucent ink (see, for example, Patent Document 1).
JP 2000-173380 A

  However, in the structure disclosed in Patent Document 1, non-transparent ink is applied around the area where the key top is disposed, but the area where the key top is disposed in the keypad is not translucent. Ink is not applied.

  In such a structure, the static electricity charged on the key top may pass through the region immediately below the key top in the keypad to which the non-light-transmitting ink is not applied, thereby affecting the operation of the key switch or the like.

  Further, as a countermeasure against the static electricity as described above, after applying the above-described ink, it is necessary to apply a conductive paint or the like to the keypad in such a manner that it is electrically connected to a predetermined ground portion. In this case, there is a problem that it is necessary to apply ink for light shielding and to apply conductive paint for countermeasures against static electricity.

  By applying a light shielding member made of a non-conductive material to a region including all regions where the key operation unit is disposed in a sheet member where a key operation unit requiring countermeasures against static electricity is disposed, An object of the present invention is to provide a portable electronic device that is shielded from light and measures against static electricity.

  The present invention includes a housing having an opening, a first key operation unit configured to have at least a part of translucency, and a non-light-transmitting property provided adjacent to the first key operation unit. A second key operation unit; and a translucent sheet member that supports the first key operation unit and the second key operation unit, wherein the first key operation unit and the second key operation unit are A key member disposed so as to be exposed to the outside of the housing through the opening, and a position opposed to the first key operation unit with the sheet member interposed therebetween; A first switch member that is operated by a pressing operation and a second switch member that is disposed at a position facing the second key operation unit with the sheet member interposed therebetween and is operated by a pressing operation of the second key operation unit A key switch member, and the second switch member in the first switch member. A light emitting member disposed on the switch member side, and the sheet member includes all of the portions facing the second key operation unit, and the second key operation unit side of the first key operation unit The present invention relates to a portable electronic device to which a light-shielding member made of a non-conductive material is applied so that the outer edges thereof extend to positions facing each other.

  Moreover, it is preferable that the said light shielding member is apply | coated to the surface at the side by which the said 1st key operation part and the said 2nd key operation part in the said sheet | seat member are arrange | positioned.

  In addition, it is preferable that a conductive paint is continuously applied to an outer surface of the second key operation unit from a portion exposed to the outside of the casing to a portion disposed inside the casing.

  Moreover, it is preferable that the said sheet | seat member is comprised by the rubber member.

  According to the present invention, the light shielding member made of a non-conductive material is applied to a region including all the region where the key operation unit is disposed in the sheet member where the key operation unit requiring countermeasure against static electricity is disposed. Thus, it is possible to provide a portable electronic device that is shielded against light and measures against static electricity.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Hereinafter, although the mobile phone 1 will be described as a portable electronic device, the present invention is not limited to this. For example, a PHS (Personal Handyphone System), a PDA (Personal Digital Assistant), a portable navigation device, a notebook computer, an electronic dictionary, a portable music player, or the like may be used.

The basic structure of the mobile phone 1 will be described with reference to FIG. FIG. 1 shows an external perspective view of the cellular phone 1 in an opened state.
As shown in FIG. 1, the mobile phone 1 includes an operation unit side body 2 and a display unit side body 3. The operation unit side body 2 and the display unit side body 3 are connected so as to be openable and closable via a connecting part 4 having a hinge mechanism. Specifically, the upper end portion of the operation unit side body 2 and the lower end portion of the display unit side body 3 are connected via a connecting portion 4. Thereby, the cellular phone 1 can relatively move the operation unit side body 2 and the display unit side body 3 which are connected via the hinge mechanism. That is, in the mobile phone 1, the operation unit side body 2 and the display unit side body 3 are in an open state (open state), or the operation unit side body 2 and the display unit side body 3 are folded. State (closed state). Here, the closed state is a state in which both housings are arranged so as to overlap each other, and the open state is a state in which both housings are arranged so as not to overlap each other.

  The outer surface of the operation unit side body 2 includes a front case 2a and a rear case 2b. This operation unit side body 2 has an operation key group 11 and a sound input hole for a sound input unit 12 as a microphone to which a sound uttered by a user of the mobile phone 1 is input on the front case 2a side. Are configured to be exposed.

  The operation key group 11 inputs a function setting operation key 13 as a first key operation unit for operating various functions such as various settings, a telephone book function, and a mail function, numbers of telephone numbers, characters such as mail, and the like. For example, the input operation key 14 is a determination operation key 15 as an operation member for determining various operations, scrolling up and down, left and right, and the like. The determination operation key 15 includes an annular key 16 as a second key operation part and a center key 17 formed at the annular center part.

  The function setting operation key member 13b constituting the function setting operation key 13 is formed with a translucent portion formed in a shape for displaying a predetermined function. The annular key member 16b constituting the annular key 16 is plated on the entire surface exposed to the outside. Thereby, the annular key member 16b is configured to be non-translucent and conductive.

  Each key constituting the operation key group 11 has a predetermined function according to the open / close state of the operation unit side body 2 and the display unit side body 3, various modes, or the type of the activated application. Assigned (key assignment). Then, when the user presses each key, an operation corresponding to the function assigned to each key is executed.

  The voice input unit 12 is disposed on the outer end side opposite to the connection unit 4 side in the longitudinal direction of the operation unit side body 2. That is, the voice input unit 12 is arranged on one outer end side when the mobile phone 1 is in the open state.

  An interface (not shown) for communicating with an external device (such as a PC) is disposed on one side surface of the operation unit side body 2, and the interface is covered with a cap 19. . A side key to which a predetermined function is assigned and an interface (not shown) for inserting and removing an external memory are arranged on the other side surface of the operation unit side body 2. Covered with a cap.

  The outer surface of the display unit side body 3 includes a front panel 3a, a front case 3b, a rear case 3c, and a rear panel. The front case 3b in the display unit side body 3 includes a display unit 21 for displaying various types of information and an audio output hole for the audio output unit 22 as a receiver for outputting the voice of the other party on the call. Configured to be exposed. Here, the display unit 21 includes a liquid crystal panel, a drive circuit that drives the liquid crystal panel, and a light source unit such as a backlight that emits light from the back side of the liquid crystal panel.

  Next, the internal structure of the operation unit side body 2 and the display unit side body 3 will be described with reference to FIGS. FIG. 2 is an exploded perspective view of members built in the operation unit side body 2. FIG. 3 is a diagram for explaining a region where the light shielding member 45 is applied in the key structure 40 described later. FIG. 4 is another view for explaining a region where a light shielding member 45 is applied in the flexible wiring board 50 described later. FIG. 5 is an exploded perspective view of members built in the display unit side body 3.

  As shown in FIG. 2, the operation unit side body 2 includes a front case 2a, a key structure 40 as a key member, a flexible wiring board 50, a shield case body 60, a reference potential pattern layer, and a cellular phone. A circuit board 70 including various electronic components such as an RF (Radio Frequency) module, a voice input unit 12, a rear case 2b including a battery lid 2c, and a battery 80 are provided.

  The front case 2a and the rear case 2b are disposed such that the concave inner surfaces face each other, and are joined so that the outer peripheral edges thereof overlap each other. The key structure 40, the flexible wiring board 50, the shield case body 60, and the circuit board 70 are housed between the front case 2a and the rear case 2b so as to be sandwiched therebetween. That is, the shield case body 60 is laminated and disposed so as to cover the circuit board 70, the flexible wiring board 50 is laminated and disposed on the upper surface side of the shield case body 60, and the key structure portion is disposed on the upper surface of the flexible wiring board 50. 40 are stacked.

  In the front case 2a, key holes 13a, 14a, and 15a as openings are formed on the inner surface facing the display unit 21 of the display unit side body 3 in a state in which the cellular phone 1 is folded. From each of the key holes 13a, 14a, 15a, the pressing surface of the function setting operation key member 13b constituting the function setting operation key 13, the pressing surface of the input operation key member 14b constituting the input operation key 14, and the determination operation key 15 The pressing surfaces of the annular key member 16b constituting the annular key 16 and the center key member 17b constituting the center key are exposed.

The exposed function setting operation key member 13b, the input operation key member 14b, the annular key member 16b, and the central key member 17b are pressed so as to be pressed down, so that they are arranged on the flexible wiring board 50. An apex of a metal dome (a bowl shape), which will be described later, provided on each of the key switches 51, 52, 53, and 54 is pressed and brought into electrical contact with the switch terminal.

  The key structure unit 40 includes an operation member 40A, a key frame 40B as a reinforcing member, and a key sheet 40C as a sheet member.

  The operation member 40A is composed of a plurality of key operation members. Specifically, it is composed of a function setting operation key member 13b as a first key operation unit, an input operation key member 14b, an annular key member 16b as a second key operation unit, and a central key member 17b.

  The function setting operation key member 13b and the input operation key member 14b are formed with a light-transmitting portion having a shape for displaying the function and the like of each operation key member. Specifically, the function setting operation key member 13b is formed with a figure-shaped translucent portion that displays a mail function and an Internet connection function. The input operation key member 14b is formed with a numeric-shaped translucent portion.

  The light emitted from the LED light emitting unit 55 disposed on the flexible wiring board 50 as a key switch member, which will be described later, is transmitted from the translucent part, and a graphic or the like showing a predetermined function is highlighted. Here, in order to suppress the light emitted from the LED light emitting unit 55 from leaking from a portion different from the light transmitting portion, a light shielding member 45 described later is applied to the key sheet 40C.

  As described above, the entire outer surface of the annular key member 16b serving as the second key operation portion that is exposed to the outside is plated. The outer surface on the side exposed to the outside includes not only a portion exposed to the outside but also a portion disposed in the operation unit side body 2 on the same surface. Thereby, the annular key member 16b is configured to be non-translucent and conductive.

  Each operation key member constituting the operation member 40A is bonded to the key sheet 40C with a key frame 40B described later interposed therebetween. As described above, the pressing surface of each operation key member bonded to the key sheet 40C is disposed so as to be exposed to the outside from each of the key holes 13a, 14a, 15a serving as openings. Specifically, the function setting operation key member 13b is arranged so that the pressing surface is exposed through the key hole 13a. Further, the input operation key member 14b is arranged so that the pressing surface is exposed through the key hole 14a. The annular key member 16b and the central key member 17b are arranged so that the pressing surface is exposed through the key hole 15b.

  The key frame 40B is a metallic plate-like member having a plurality of holes 14c. The key frame 40B is a reinforcing member for preventing an adverse effect on the circuit board 70 and the like when the input operation key member 14b is pressed. In other words, the key frame 40B is made of a conductive member, and also functions as a member for releasing static electricity that jumps into the ground portion of the circuit board 70 when the input operation key member 14b is operated. The plurality of holes 14c formed in the key frame 40B are arranged so that convex portions 14d formed in the key sheet 40C described later are fitted. The input operation key member 14b is bonded to the convex portion 14d. Further, the key frame 40B has a function of suppressing the bending of the flexible key sheet 40C, and prevents the key sheet 40C from being lifted when the input operation key member 14b is operated, or the key sheet 40C. It is comprised so that positioning may be performed.

The hole 14c is formed so as to be larger than the outer periphery of the convex portion 14d and smaller than the outer periphery of the input operation key member 14b. Since the hole portion 14c is formed in this way, the outer periphery of the input operation key member 14b is placed on the lattice portion 14e formed around the hole portion 14c.
When the pressing surface of the input operation key member 14b is pressed, the pressing surface is bent and the outer periphery placed on the lattice portion 14e is supported by the lattice portion 14e. That is, the key frame 40 </ b> B can obtain the deformation necessary for the key operation and can suppress the excessive pressure applied to the circuit board 70.

  The key frame 40B is fixed to a shield case body 60 described later by a conductive fixing member inserted through the fixing portion 42. The key frame 40b is electrically connected to the shield case body 60. Since the shield case body 60 is electrically connected to a reference potential pattern layer 75 as a reference potential portion as will be described later, the key frame 40B is electrically connected to the reference potential pattern layer 75 via the shield case body 60. Connected to.

  The key sheet 40C as a sheet member is formed of a light-transmitting rubber member. Specifically, the key sheet 40C is configured by a flexible silicon rubber sheet-like member. A key operation member constituting the operation member 40A is joined to the key sheet 40C, and the key operation member constituting the operation member 40A is supported.

  Here, the key sheet 40C is formed with a plurality of convex portions 14d on the surface on which the key frame 40B is disposed. Each of the plurality of convex portions 14d is formed at a position corresponding to a key switch 52 described later. Each of the plurality of convex portions 14d is disposed so as to fit into each of the plurality of hole portions 14c formed in the key frame 40B. The input operation key member 14b is joined to the top surfaces of the plurality of convex portions 14d arranged so as to be fitted in the plurality of hole portions 14c by an adhesive.

  A light shielding member 45 is applied to the surface of the key sheet 40C on which the operation member 40A (the function setting operation key 13 and the determination operation key 15) on which the key frame 40B is not disposed is opposed. The light shielding member 45 is an insulating member and a member excellent in light shielding properties. The light shielding member 45 is silicon rubber ink composed of a black insulating paint, and is applied to the above-described surface of the key sheet 40C.

  As shown in FIG. 3, the light shielding member 45 is applied to a region including all of the regions where the annular key member 16 b as the second key operation unit is opposed to the key sheet 40 </ b> C as the sheet member. Specifically, the light shielding member 45 includes the entire region where the annular key member 16b in the key sheet 40C is disposed so as to oppose, and the annular key member 16b side of the function setting operation key member 13b as the first key operation unit. The outer part 130 is formed so that its extension extends to a position where the end part 130 is opposed. That is, the light shielding member 45 is located at the end of the function setting operation key member 13b from the region of the key sheet 40C where the annular key member 16b is disposed to face the end 135 of the annular key member 16b on the function setting operation key member 13b side. Arranged in the area up to the section 130.

  Further, the light shielding member 45 is also applied to the region 131 facing between the function setting operation key members 13b in the key sheet 40C. Further, the light shielding member 45 is configured such that the function setting operation key member 13b or the annular key member 16b in the key frame 40B is located from the position where the end of the function setting operation key member 13b or the annular key member 16b in the key sheet 40C faces the key frame 40B. It is applied also to the region 132 up to the position where the end on the side faces. That is, the light shielding member 45 is also applied to a portion that does not require the light shielding treatment.

  Here, since the light shielding member 45 is made of an insulating material, the light shielding member 45 also functions as an insulating member.

  As shown in FIG. 2, the flexible wiring board 50 as a key switch member has a plurality of key switches 51, 52, 53, 54 arranged on the key sheet 40C side. The key switch 51 as the first switch member, the key switch 52, the key switch 53 as the second switch member, and the key switch 54 each have a function setting operation key member as a first key operation unit with the key sheet 40C interposed therebetween. 13b, the input operation key member 14b, the annular key member 16b as the second key operation portion, and the central key member 17b are arranged at positions facing (corresponding to) each of them.

  Each of the key switches 51, 52, 53, and 54 disposed on the flexible wiring board 50 has a structure having a metal dome that is a three-dimensionally formed metal plate that is curved like a bowl. When the apex of the bowl-shaped shape is pressed, the metal dome contacts a switch terminal formed on an electric circuit (not shown) printed on the surface of the flexible wiring board 50 so as to be electrically connected. Composed. That is, each of the key switches 51, 52, 53, and 54 is operated by pressing the function setting operation key member 13b, the input operation key member 14b, the annular key member 16b, and the central key member 17b. The flexible wiring board 50 is obtained by sandwiching wiring between a plurality of insulating films.

  As shown in FIG. 2 or 4, an LED light emitting unit 55 as a light emitting member is arranged on the surface of the flexible wiring board 50 on the side where the key switches 51, 52, 53, 54 are arranged. Specifically, it is disposed between the key switches. Specifically, it is disposed at a position adjacent to the function setting operation key member 13b and the input operation key member 14b having a light transmitting portion. In the function setting operation key member 13b as the first key operation unit, the LED light emitting unit 55 is disposed on the annular key member 16b side as the second key operation unit. That is, the LED light emitting unit 55 is disposed between the function setting operation key member 13b and the annular key member 16b.

  The LED light emitting unit 55 irradiates the key sheet 40C side with light. Specifically, the LED light emitting unit 55 irradiates light toward the function setting operation key member 13b, the input operation key member 14b, and the annular key member 16b each having a translucent portion via the key sheet 40C. The light emitted from the LED light emitting portion 55 is transmitted through the light transmitting portion formed on each key member to the outside and is not transmitted in the region where the light shielding member 45 is applied.

  The flexible wiring board 50 is placed on a flat plate portion 61 in a shield case body 60 described later. Since the flexible wiring board 50 is placed on the flat plate portion 61 of the shield case body 60, the pressure and deflection caused by the pressing of each operation member 40 </ b> A are transmitted to the circuit board 70 disposed below the shield case body 60. It is hard to be done.

  The shield case body 60 is a conductive member having a shape in which one wide surface of a thin rectangular parallelepiped is opened. The shield case body 60 includes ribs 62 that are formed substantially perpendicular to the opening-side surface of the flat plate portion 61. The rib 62 is formed to be equal to or sufficiently higher than the height of the tallest electronic component among the various electronic components mounted on the circuit board 70. The ribs are formed on the periphery and inside of the flat plate portion 61 so as to correspond to the reference potential pattern layer 75. Specifically, the rib is formed so as to be disposed on the reference potential pattern layer 75 in a state where the shield case body 60 is placed on the circuit board 70. The shield case body 60 may be formed of a metal, a skeleton formed of a resin, and a conductor film formed on the surface thereof.

  The shield case body 60 is electrically connected to the reference potential pattern layer 75 by contacting the bottom surface of the rib with the reference potential pattern layer 75. The shield case body 60 is electrically connected to the reference potential pattern layer 75 to have the same potential as the reference potential pattern layer 75. That is, the shield case body 60 functions as a shield case. The shield case body 60 prevents noise from the outside from acting on various electronic components (not shown) arranged on the circuit board 70 as a shield case, and noise emitted from a high-frequency circuit such as an RF (Radio Frequency) circuit. Is absorbed to prevent it from acting on other electronic components. Specifically, the bottom surface of the rib in the shield case body 60 is disposed on the reference potential pattern layer 75, so that each circuit described later is surrounded by the rib and covered by a part of the flat portion. The rib functions as a partition wall in each circuit, and shields each circuit together with a part of the shield case body 60.

  The flexible wiring board 50 is placed on the shield case body 60, and the key frame 40 </ b> B is stacked on the flexible wiring board 50. The key frame 40B is electrically connected to the shield case body 60.

  Various electronic components and circuits (not shown) are arranged on the circuit board 70. Various electronic components form a plurality of circuit blocks by a predetermined combination. For example, various circuit blocks including an RF (Radio Frequency) circuit, a power supply circuit, and the like are formed.

  A reference potential pattern layer 75 as a reference potential portion is formed on the circuit board 70. The reference potential pattern layer 75 is formed so as to partition each circuit block. The reference potential pattern layer 75 is formed by printing a conductive member in a predetermined pattern on the surface of the circuit board 70.

  The circuit board 70 and the shield case body 60 are partially fixed in a detachable manner at the plurality of connecting portions A. Specifically, the circuit board side screw holes formed at the four corners of the circuit board 70 shown in FIG. 2 and the shield case body side screw holes formed by disposing predetermined members at the four corners of the shield case body 60 (not shown). The circuit board 70 and the shield case body 60 are detachably fixed by screwing a screw member into the overlapped screw hole in a state in which they are overlapped.

  Specifically, the shield case body 60 is fixed to the circuit board 70 in a state where the bottom surface of the rib is in contact with the reference potential pattern layer 75. That is, the reference potential pattern layer 75 and the shield case body 60 in the circuit board 70 are electrically connected. Here, since the key frame 40B is electrically connected to the shield case body 60 as described above, the key frame 40B is electrically connected to the reference potential pattern layer 75 via the shield case body 60.

  The rear case 2b is provided with a detachable battery lid 2c. After the battery 80 is accommodated from the outside of the rear case 2b, it is attached to the rear case 2b. Further, the rear case 2b accommodates a voice input unit 12 for inputting the user's voice.

  As shown in FIG. 5, the display unit side body 3 includes a front panel 3a, an audio output unit 22, a front case 3b, a speaker 23, a display unit 21, and a printed circuit board 85 to which the display unit 21 is connected. And a rear case 3c and a rear panel 3d.

  The display unit side body 3 includes a front panel 3a, a front case 3b, a display unit 21, a printed circuit board 85, a rear case 3c, and a rear panel 3d that are stacked. Specifically, the front case 3b and the rear case 3c are arranged so that the inner surfaces of the concave shapes face each other, and are joined so that the outer peripheral edges thereof overlap each other.

  A printed circuit board 85 to which the display unit 21 is connected is sandwiched between the front case 3b and the rear case 3c. A speaker 23 connected to an amplifier (not shown) is connected to the printed board 85.

  In the present embodiment, the cellular phone 1 that can be folded by the connecting portion 4 is described. However, the cellular phone 1 is not foldable, and the operation unit side body 2 and the display unit side body 3 are overlapped. One of the casings is centered on an axis along the overlapping direction of the operation unit side casing 2 and the display unit side casing 3 so that one casing is slid in one direction from the combined state. A rotating (revolver) type that is rotated, or a type (straight type) in which the operation unit side body 2 and the display unit side body 3 are arranged in one housing and do not have a connecting portion may be used.

  Next, the operation of the light shielding member 45 will be described. The light shielding member 45 shields light from the LED light emitting unit 55 and prevents static electricity from the operation key member and the outside from being conducted to electronic components in the housing. The light shielding member 45 also functions as an insulating member, and is used not only as a countermeasure against light shielding but also as a countermeasure against static electricity.

  First, the light irradiated from the LED light emission part 55 arrange | positioned between the key switch 51 and the key switch 53 permeate | transmits the key sheet | seat 40C. The light transmitted through the key sheet 40C is transmitted through a light transmitting portion formed in the function setting operation key member 13b. Thereby, the translucent part formed in the function setting operation key member 13b emits light when viewed from the outside, and the shape, numbers, and the like configured by the translucent part are highlighted.

  A part of the light emitted from the LED light emitting unit 55 and transmitted through the key sheet 40 </ b> C is shielded by the light shielding member 45. That is, the light shielding member 45 shields the light emitted from the LED light emitting unit 55. Specifically, the light shielding member 45 prevents light from being transmitted through a region where the light shielding member 45 is applied. Since light transmission in the region shown in FIG. 3 where the light shielding member 45 is applied is prevented, light leakage from the periphery of the annular key member 16b and the like is suppressed.

  Here, since the entire surface of the annular key member 16b exposed to the outside is plated with a conductive material, static electricity from the outside is charged on the annular key member 16b, and the charged static electricity. Is easy to get inside the housing. The light shielding member 45 also functions as a member for countermeasures against static electricity. Specifically, the light shielding member 45 is made of an insulating material, and is applied to a region including all of the regions where the function setting operation key member 13b in the key sheet 40c is disposed so as to face each other. It is possible to suppress static electricity or the like entering the casing through the plating applied to the surface of the setting operation key member 13b from passing through the key sheet 40C. Since the insulating light-shielding member is disposed at the portion where the function setting operation key member 13b is disposed so as to face and abut, it is possible to suppress conduction (static electricity jumps in) to the internal electronic components via the key sheet 40C.

  According to the present embodiment, since the insulating light shielding member 45 is applied to the above-described region on the key sheet 40C, it is possible to prevent light from leaking out from unnecessary portions and to prevent static electricity from the key operation member and the like. It is possible to suppress electrical conduction to internal electronic components. That is, malfunction of electronic components due to static electricity can be suppressed. In particular, when the entire surface of the annular key member 16b as the second key operation portion is plated as described above, static electricity is transmitted to the inside through the surface of the annular key member 16b. Applying the light shielding member 45 to the above-described region is preferable as a countermeasure against static electricity. Further, when the key sheet 40C is a silicon sheet member, it is preferable that the problem of static electricity being transmitted through pinholes generated in the silicon sheet member is solved by applying the light shielding member 45.

  Further, according to the present embodiment, since the light shielding member 45 made of an insulating material is applied to the surface of the key sheet 40C, light shielding and countermeasures against static electricity are possible, so that the manufacturing process can be reduced. Thereby, the burden on the manufacturing process can be reduced and the manufacturing cost can be reduced.

  Further, according to the present embodiment, the light shielding member 45 can also be constituted by a general-purpose paint or the like, and manufacturing difficulties and costs resulting from applying a conductive paint with strict conventional application conditions. A rise or the like can be avoided.

  As mentioned above, although preferred embodiment of this form was described, this invention can be implemented with a various form, without being limited to embodiment mentioned above. For example, in the present embodiment, the light shielding member 45 can be a paint or ink having both light shielding properties and insulating properties. Further, the color of the light shielding member 45 is not limited to black, and the color is not limited unless the light shielding property is extremely low. Here, the light shielding member 45 is applied to the surface of the key sheet 40C. For application in the present embodiment, application, painting, printing, welding a sheet-like member, and pasting a seal-like member are performed. Is included.

The external appearance perspective view in the state where cellular phone 1 was opened is shown. FIG. 6 is an exploded perspective view of members built in the operation unit side body 2. It is a figure explaining the area | region where the light shielding member 45 was apply | coated. It is another figure explaining the area | region where the light shielding member 45 was apply | coated. FIG. 5 is an exploded perspective view of members built in the display unit side body 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cellular phone 2 Operation part side body 3 Display part side body 11 Operation key group 13 Function setting operation key 13a Key hole 13b Function setting operation key member 14a Key hole 15a Key hole 16 Ring key 16b Ring key member 40 Key structure part 40A Operation member 40B Key frame 40C Key sheet 45 Light shielding member 50 Flexible wiring board 51 Key switch 52 Key switch 53 Key switch 54 Key switch 55 LED light emitting part 60 Case body 70 Circuit board

Claims (4)

A housing having an opening;
A first key operation unit configured to have at least a part of translucency; a non-translucent second key operation unit provided adjacent to the first key operation unit; and the first key operation. And a translucent sheet member that supports the second key operation unit, and the first key operation unit and the second key operation unit are located outside the casing through the opening. A key member arranged to be exposed;
A first switch member disposed at a position facing the first key operation unit with the sheet member interposed therebetween and operated by a pressing operation of the first key operation unit; and the first switch member with the sheet member interposed therebetween. A second switch member disposed at a position facing the two-key operation unit and operated by a pressing operation of the second key operation unit, and a key switch member having
A light emitting member disposed on the second switch member side of the first switch member,
The sheet member includes all of the portions facing the second key operation portion and is non-conductive so that the outer edge on the second key operation portion side of the first key operation portion extends to a position facing the second key operation portion. A portable electronic device to which a light shielding member made of a material is applied.   The portable electronic device according to claim 1, wherein the light shielding member is applied to a surface of the sheet member on the side where the first key operation unit and the second key operation unit are arranged.   3. The conductive paint is continuously applied to an outer surface of the second key operation unit from a portion exposed to the outside of the housing to a portion disposed inside the housing. The portable electronic device described.   The portable electronic device according to claim 1, wherein the sheet member is configured by a rubber member.

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