JP4642004B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device such as a portable terminal.

2. Description of the Related Art Conventionally, some electronic devices, such as mobile terminals, have a metal mirror applied to the back side of a resin display plate to form a half mirror (see, for example, Patent Document 1). When metal coating is applied, the metal coating portion is charged by the influence of the outside, and the charged static electricity may jump into the electronic component inside the housing and adversely affect the electronic component. As a countermeasure against this static electricity, when the circuit board is arranged on the back side of the display plate in the above configuration, the conductive member connected to the reference potential portion on the circuit board is placed on the back side of the display plate that is coated with metal. By abutting, the metal coating portion and the reference potential portion of the circuit board are energized.
JP 2003-058067 A

  In recent years, there has been an increasing need for miniaturization and thinning of portable terminals, and glass members are used instead of resin-made display plates so that a predetermined strength can be maintained even when the casing is thinned. There is a configuration that uses a designated display plate. And when using a glass member in this way, in order to prevent scattering of the glass member at the time of breakage, the film member for scattering prevention is stuck on the back surface. In this configuration, when the display plate has a half mirror function, a metal coating is applied to the back surface of the glass member, and a film member for preventing scattering is attached to the back surface of the metal coating. However, since there is a film member for preventing scattering, even if the conductive member connected to the reference potential portion on the circuit board is brought into contact with the back surface of the display plate as in the conventional case, the reference of the metal coating portion and the circuit board The potential part cannot be energized.

  Accordingly, the present invention provides an electronic device capable of guiding static electricity charged on a metal coating portion to a reference potential portion in a housing even when a film for preventing scattering is attached to a plate member. With the goal.

  In order to solve the above problems, an electronic device of the present invention is disposed on a housing, an outer surface of the housing, and has a transmissive member having transparency, and is applied to a rear surface of the transmissive member on the inner side of the housing. In an electronic apparatus comprising: a plate member configured to have a metal coating member; and a circuit board that is disposed inside the housing and on which an electronic component is mounted. A film member affixed to the back side of the transmissive member, and a conductive member disposed opposite to the outer peripheral portion of the plate member and conducted to the reference potential portion of the circuit board.

  The casing includes a case member, and the case member has a first opposing portion that faces the outer peripheral portion of the plate member and a second opposing portion that faces the circuit board, and the conduction The member is configured to include the case part to which conductive coating is applied across the first opposing part and the second opposing part, and the second opposing part contacts the reference potential portion of the circuit board. By doing so, the first opposing portion may be conducted to the reference potential portion of the circuit board through the metal coating.

  The conductive member may be an elastic conductive member that is disposed between an outer peripheral portion of the plate member and the reference potential portion of the circuit board and is elastic.

  The conducting member is composed of a flexible conducting member having flexibility, and the flexible conducting member is arranged such that one end side is opposed to the outer peripheral portion of the plate member and the other end side is the reference of the circuit board. The portion that is disposed to face the potential portion and that faces the reference potential portion may be in contact with the reference potential portion.

  The housing includes a case member, and the case member has a protruding portion that protrudes toward the circuit board at a position facing the reference potential portion with which the flexible conductive member abuts. May be.

  The metal coating member may be disposed so as to extend to the outer peripheral side from the outer peripheral end portion of the film member so that a part thereof is exposed.

  The conducting member may be arranged to face the outer peripheral portion of the plate member on the arrangement position side of the electronic component on the circuit board.

  The conducting member may be conducted at a plurality of locations to a reference potential portion of the circuit board.

  According to the present invention, even if the film member is affixed to the back surface side of the plate member, the conductive member that is connected to the reference potential portion of the circuit board is disposed facing the outer peripheral portion of the plate member. Static electricity charged on the metal coating member can be guided to the reference potential portion in the housing.

[First Embodiment]
Hereinafter, a foldable mobile phone will be described as an electronic apparatus according to the first embodiment of the present invention. However, the electronic device of the present invention is not limited to a foldable mobile phone, but may be a so-called straight-type mobile phone. The electronic device is not limited to a mobile phone, and may be another electronic device such as a game-only machine or a PDA. There may be.

  FIG. 1 is a diagram showing a folded state of the mobile phone 1. As shown in the figure, the first casing 2 of the mobile phone 1 of the present embodiment has a first casing 2 and a second casing 3 that are substantially rectangular shapes that can be opened and closed with each other. A plate member 4 including a glass substrate made of tempered glass, which is a transmissive member having permeability, is disposed on a part of the outer surface 2a of the first housing 2.

  FIG. 2 is a development view of the first housing 2 in the mobile phone 1. As shown in the figure, the first casing 2 of the mobile phone 1 includes a plate member 4, a first outer case 5 in which the plate member 4 is fitted, and both surfaces that bond the plate member 4 and the first outer case 5. The circuit board 7 is sandwiched and stored between the tape 6, the circuit board 7 on which the electronic component 19 is mounted, and the first outer case 5 by being fitted to the first outer case 5. And a second exterior case 8 constituting the outer surface 2a of the first housing 2.

  The plate member 4 is a rectangular plate-like member. As shown in a cross section in FIG. 3, the glass substrate 10 made of tempered glass described above and the inner surface (back surface) of the glass substrate 10 that is the inner side of the first housing 2. And a metal coating member 11 applied to 10a, and a film member 12 attached to the inner side of the glass substrate 10 with the metal coating member 11 interposed therebetween. The metal coating member 11 is a thin film made of metal, transmits a part of incident light and reflects the rest, thereby giving the plate member 4 a function as a half mirror when viewed from the outside. . Further, the film member 12 prevents the glass from scattering when the glass substrate 10 is broken.

  Returning to FIG. 2, the first exterior case 5 has a rectangular shape and the outer periphery is curved, and the curved portion forms a fitting portion 5 a with the second exterior case 8. A concave portion 15 for fitting the plate member 4 is provided at the center of the first outer case 5. The recess 15 has a bottom surface 15a, and the bottom surface 15a is provided with two openings 17a and 17b in the present embodiment. Further, on the first exterior case 5, a concave portion 16 that is continuous from the concave portion 15 in the longitudinal direction and shallower than the concave portion 15 is formed on the opposite side of the rotating shaft side in the opening / closing operation of the first housing 2. A cover 9 detachably attached to the first exterior case 5 is attached to the part 16.

  The double-sided tape 6 has substantially the same shape as the recess 15 of the first outer case 5, and two openings 18 a and 18 b are provided in the same manner as the first outer case 5. However, the opening 18b on the rotating shaft side of the first housing 2 is smaller than the opening 17b on the rotating shaft side of the first outer case 5 described above, and when the double-sided tape 6 is attached to the first outer case 5, the double-sided tape The inner edge portion of the six opening portions 18b protrudes inward from the inner periphery of the opening portion 17b.

  Various electronic components 19 are mounted on the circuit board 7 as described above. Further, a sub-display 20 such as an organic EL (electroluminescence) display or an LCD (liquid crystal display) is disposed on the circuit board 7 in order to display time and calendar, for example. The outer periphery of the sub display 20 is directly attached to the plate member 4 by the inner edge of the opening 18b of the double-sided tape 6 when the first housing 2 is assembled. Various displays on the sub-display 20 can be viewed from the outside through the opening 18b of the double-sided tape 6 and the half-mirror plate member 4.

  Next, the first exterior case 5 will be described in more detail. FIG. 4 is a top view of the first exterior case 5 and shows a state in which the cover 9 is removed and the indented portion 16 is exposed. The bottom surface (first opposing portion) 15a of the concave portion 15 is a portion that faces the outer peripheral portion of the plate member 4 when assembled. In the region indicated by hatching in FIG. The conduction | electrical_connection part 23 is formed by vapor-depositing and coating a conductive member so that it can take. The conductive member may be any member having conductivity such as metal coating.

  FIG. 5 is a bottom view (inner housing inner surface) of the first outer case 5. On this lower surface, when the first housing 2 is assembled, a protruding portion that protrudes toward the circuit board 7 is formed at a position facing the ground portion 7 b formed on the surface of the circuit board 7. Ribs (second opposing portions) 24 are provided at a plurality of locations. The circuit board 7 in the first exterior case 5 includes a region corresponding to a portion where the concave portion 15 is formed on the upper surface, and a side surface and a lower surface (tip surface) of the rib 24 continuing from the region, which are indicated by hatching in the drawing. The conductive portion 23 ′ is formed by continuously depositing and coating the conductive member continuously from the conductive portion 23 on the upper surface side of the concave portion 15 of the first exterior case 5 described above. ing.

  FIG. 6 is a partial cross-sectional view in the longitudinal direction of the casing on the side opposite to the rotation axis of the first casing 2, showing a state in which the plate member 4 is placed in the recess 15 of the first exterior case 5. . As shown in the drawing, the conductive portion 23 is formed not only on the bottom surface 15a of the concave portion 15 in the first exterior case 5, but also on the side surface (second opposing portion) 15b of the concave portion 15. The upper end 23 a is disposed up to a position that opposes the outer peripheral end of the metal coating member 11 of the plate member 4, and comes into contact with the outer peripheral end. The conduction portion 23 is formed to extend from the side surface 15b of the recess 15 to the back surface 15d through the bottom surface 15a and the inner surface 15c, and extends to the bottom of the rib 24 of the first exterior case 5, and is integrated with the conduction portion 23 ′. It is composed continuously.

  Returning to FIG. 2, when the first housing 2 is assembled, the circuit board 7 is placed in the second outer case 8, and the first outer case 5 and the second outer case 8 are fitted. The plate member 4 is adhered to the recess 15 of the first outer case 5 via the double-sided tape 6, and the cover 9 is attached to the recessed portion 16 of the first outer case 5.

  When assembled in this manner, as shown in FIG. 6, the tip surface (the lower surface shown in FIG. 6) of the rib 24 of the first outer case 5 is formed on the surface of the circuit board 7 and serves as a reference potential portion. The circuit board 7 is pressed between the first outer case 5 and the second outer case 8 (not shown in FIG. 6). At this time, since the conductive portion 23 ′ is also formed on the lower surface of the rib 24, the conductive portion 23, 23 ′ extending from the side surface 15 b of the concave portion 15 to the bottom surface 15 a, the inner surface 15 c, and the back surface 15 d of the concave portion 15 Thus, a conductive structure is formed from the side surface 15b of the circuit board 15 to the ground portion 7b of the circuit board 7.

  As described above, according to the present embodiment, the conductive portion 23 formed on the side surface 15 b of the recess 15 is disposed opposite to and in contact with the outer peripheral end portion of the metal coating member 11 of the plate member 4. The conductive portion 23 extends from the side surface 15 b of the recess 15 to the bottom surface 15 a, the inner surface 15 c, and the back surface 15 d, and is conductive to the ground portion 7 b of the circuit board 7. For this reason, the static electricity charged on the metal coating member 11 is guided from the edge of the metal coating member 11 to the upper end 23a of the conduction part 23 and flows to the ground portion 7b of the circuit board 7 through the conduction parts 23 and 23 '. be able to. Accordingly, static electricity charged on the metal coating member 11 can be prevented from jumping into the electronic component 19 on the circuit board 7. Furthermore, the static electricity charged on the metal coating member 11 does not adversely affect the electronic component 19 directly below the plate member 4, and it is possible to suppress the destruction and malfunction.

  In the present embodiment, the upper end 23a of the conducting portion 23 is formed (arranged) so as to face and contact the outer peripheral end of the metal coating member 11 of the plate member 4, but the present invention is not limited thereto. Without being limited, the upper end 23 a of the conductive portion 23 extending to the side surface 15 b of the concave portion 15 may not be in contact with the outer periphery of the metal coating member 11 of the plate member 4, and the outer peripheral end portion of the metal coating member 11 and the upper end of the conductive portion 23. A gap may be provided between the head 23a. Furthermore, in the present embodiment, the upper end 23 a of the conducting portion 23 extends to the side surface 15 b of the recess 15, but is not limited thereto, and the end portion of the conducting portion 23 may be located on the bottom surface 15 a of the recess 15. In these cases, the conductive portion 23 and the metal coating member 11 are not in contact with each other, but the electric charge charged in the metal coating member 11 tends to be released to the nearby conductive portion 23 and is not in contact. In both cases, by disposing the conductive portion 23 so as to face the outer peripheral portion of the plate member 4, static electricity can be discharged from the metal coating member 11 to the conductive portion 23 and can flow to the ground portion 7 b of the circuit board 7. Therefore, even in this case, regardless of the presence of the film member 12 for preventing scattering, the metal coating member 11 can discharge the charged electric charge, and malfunction and destruction of the electronic components of the circuit board 7 due to the charging of the electric charge. This can reduce the possibility of adverse effects.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. Also in the second embodiment, a foldable mobile phone will be described as an electronic device. However, a straight-type mobile phone may be used as in the first embodiment, and other electronic devices such as a game machine and a PDA may be used. May be. Also, the description of the same parts as those in the first embodiment is omitted.

  FIG. 7 is a development view of the first housing 102 in the mobile phone 101. In the present embodiment, unlike the first embodiment, a conductive portion by vapor deposition or conductive coating is not provided in the recess 115 of the first outer case 105. On the other hand, a rectangular hole 126 is provided in the outer peripheral portion of the recess 115. In addition, a gasket 125, which is an elastic conductive member whose outer periphery is covered with a metal member, is attached to a position corresponding to the hole 126 in the ground portion 107b on the circuit board 107.

  FIG. 8 is a partial cross-sectional view of the first housing 102 showing a state where the plate member 104 is placed in the recess 115 of the first exterior case 105. As illustrated, when the first housing 2 is assembled, the gasket 125 disposed on the ground portion 107 b of the circuit board 107 passes through the hole 126 of the first outer case 105. At this time, the upper side of the gasket 125 is slightly above the bottom surface 115 a of the recess 115. On the other hand, as shown in the drawing, the lower end portion 104a on the outer periphery of the plate member 104 is tapered and cut obliquely. Accordingly, the outer peripheral end portion of the metal coating member 111 is extended to the outer peripheral side with respect to the outer peripheral end portion of the film member 112, and a part thereof is exposed and disposed. The upper portion of the gasket 125 positioned slightly above the bottom surface 115a of the recess 115 is elastically deformed by hitting the lower end portion 104a of the plate member 104, and the outer peripheral end portion of the metal coating member 111 is pressed against the upper portion of the gasket 125. The coating member 111 and the metal member 125a covering the outer periphery of the gasket 125 are in good contact.

  As described above, according to the present embodiment, the gasket 125 having a soft back, which is an elastic member, is used, the lower end portion 104a of the plate member 104 is cut obliquely, and the outer peripheral end portion of the metal coating member 111 is pressed against the gasket 125. It is done. For this reason, the outer peripheral end of the metal coating member 111 at the lower end 104 a of the plate member 104 can be reliably brought into contact with the metal member 125 a of the gasket 125. It is reliably discharged to the ground portion 107b through the member 125a. Accordingly, static electricity charged on the metal coating member 111 is prevented from jumping into the electronic components on the circuit board 107. Furthermore, the static electricity charged on the metal coating member 111 does not adversely affect the electronic components directly below the plate member 104, and it is possible to suppress the destruction and malfunction.

  In the present embodiment, the lower end portion 104a of the plate member 104 is cut obliquely so that the outer peripheral end portion of the metal coating member 111 extends to the outer peripheral side from the outer peripheral end portion of the film member 112, and a part thereof. Although it is configured to be exposed and disposed, it is not limited to this. For example, by attaching a film member 112 whose outer peripheral frame is smaller than the metal coating member 111, the outer peripheral end portion of the metal coating member 111 extends to the outer peripheral side from the outer peripheral end portion of the film member 112, and a part is exposed. You may comprise so that it may arrange | position. Further, if the position where the gasket 125 is provided on the circuit board 107 and the position where the hole 126 is provided in the first exterior case 105 are positions corresponding to the outer peripheral end portion of the metal coating member 111 of the plate member 104, it is mechanically determined. Any convenient location may be used. In addition, the number of sets of the gasket 125 and the hole 126 is one in the present embodiment, but a plurality of sets can be provided. It is preferable to provide a plurality of sets because conduction is improved. Further, when a plurality of sets are provided, it is preferable to provide them on both ends in the longitudinal direction of the casing in consideration of the influence on the antenna.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. Although the third embodiment will also be described with respect to a foldable mobile phone, the present invention is not limited to this, and a description of the same parts as those of the first embodiment is also omitted.

  FIG. 9 is a cross-sectional view of the first housing 202 showing a state where the plate member 204 is placed in the recess 215 of the first exterior case 205. As shown in the drawing, in this embodiment, a conductive cloth member 225 which is a flexible conductive member having flexibility is attached to the concave portion 215 of the first exterior case 205. The upper end 225 a of the conductive cloth member 225 extends to the side surface 215 b of the recess 215, and is opposed to and in contact with the outer peripheral end portion of the metal coating member 211 of the plate member 204. Then, the conductive cloth member 225 continues from the side surface 215b of the recess 215 to the back surface 215d through the bottom surface 215a and the inner surface 215c, and is the tip of the rib 224 that protrudes toward the circuit board 207 (see FIG. 9). (Lower end shown). Then, when the first exterior case 205 is assembled and the plate member 204 is disposed in the recess 215, the outer peripheral end of the metal coating member 211 is in contact with the upper end 225a of the conductive cloth member 225, and the ground of the metal coating member 211 and the circuit board 207 is reached. The portion 207b is electrically connected.

  According to this embodiment, the first exterior case 205 has the rib 224, and the other end of the conductive cloth member 225 that contacts the outer peripheral end of the metal coating member 211 at the upper end 225a is the rib 224 and the circuit board. Since it is sandwiched between the ground portion 207b of 207, the metal coating member 211 and the ground portion 207b are reliably conducted. As a result, static electricity charged on the metal coating member 211 is guided from the edge of the metal coating member 211 to the upper end 225a of the conductive cloth member 225, and passes through the conductive cloth member 225 to the ground portion 207b of the circuit board 207. Can flow. Therefore, static electricity charged on the metal coating member 211 can be prevented from jumping into the electronic components on the circuit board 207. Furthermore, the static electricity accumulated in the metal coating member 211 does not adversely affect the electronic components directly below the plate member 204, and it is possible to suppress destruction and malfunction.

  Also in this embodiment, the upper end 225 a of the conductive cloth member 225 extending to the side surface 215 b of the recess 215 does not have to be in contact with the outer peripheral end of the metal coating member 211 of the plate member 204. A gap may be provided between the end portion and the upper end 225a of the conductive cloth member 225. Furthermore, in this embodiment, the upper end 225a of the conductive cloth member 225 extends to the side surface 215b of the recess 215, but is not limited to this, and the end of the conductive cloth member 225 is positioned on the bottom surface 215a of the recess 215. Thus, the plate member 204 may be disposed to face the outer peripheral portion. In these cases, the conductive cloth member 225 and the metal coating member 211 are not in contact with each other, but the electric charge charged in the metal coating member 211 tends to be released to the nearby conductive cloth member 225, and thus is in contact. Even without this, static electricity can be released from the metal coating member 211 to the conductive cloth member 225 and flow to the ground portion 207 b of the circuit board 207. Further, similarly to the second embodiment, the conductive cloth member 225 can be provided at any place that is mechanically convenient. Further, the number of the conductive cloth members 225 attached may be any number of 1 or more. In the case of mounting a plurality, it is preferable to be at both ends in the longitudinal direction in consideration of the influence on the antenna. In addition, although this embodiment used the conductive cloth member, it is not limited to this, As long as it is flexible, metal members, such as a copper foil tape and a sheet metal, may be sufficient.

  As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this. For example, in this embodiment, although the glass substrate made from a tempered glass was demonstrated as a transmissive member, it is not limited to a glass substrate, It is applicable also when sticking the film for scattering prevention in a transparent resin board.

1 is a perspective view of a mobile phone according to the present invention. It is an expanded view of the 1st housing | casing of the mobile telephone which concerns on 1st Embodiment of this invention. It is sectional drawing of a plate member. It is a top view of the 1st exterior case concerning a 1st embodiment of the present invention. It is a bottom view of the 1st exterior case concerning a 1st embodiment of the present invention. It is the fragmentary sectional view of the 1st housing | casing which showed the state by which the plate member was mounted in the recessed part of the 1st exterior case which concerns on 1st Embodiment. It is an expanded view of the 1st housing | casing of the mobile telephone which concerns on 2nd Embodiment of this invention. It is the fragmentary sectional view of the 1st housing | casing which showed the state by which the plate member was mounted in the recessed part of the 1st exterior case which concerns on 2nd Embodiment. It is the fragmentary sectional view of the 1st housing | casing which showed the state by which the plate member was mounted in the recessed part of the 1st exterior case which concerns on 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101,201 Mobile phone 2,102,202 1st housing | casing 3 2nd housing | casing 4,104,204 Plate member 5,105,205 1st exterior case 6 Double-stick tape 7,107,207 Circuit board 7b, 107b , 207b Ground portion 8 Second exterior case 10 Glass substrate 11, 111, 211 Metal coating member 12, 112, 212 Film member 15, 115, 215 Recess 19 Electronic component 23 Conducting portion 24, 224 Rib 125 Gasket 126 Hole 225 Conductivity Cloth material

Claims (8)

A housing,
A plate member that is disposed on the outer surface of the casing and includes a permeable member having transparency and a metal coating member applied to the rear surface of the transmissive member on the inner side of the casing;
A circuit board disposed inside the housing and on which electronic components are mounted;
In electronic equipment with
A film member attached to the back side of the transmission member with the metal coating member interposed therebetween;
A conductive member disposed opposite to the outer peripheral portion of the plate member and conducted to the reference potential portion of the circuit board;
An electronic device comprising: The housing is configured with a case member,
The case member has a first facing portion facing the outer peripheral portion of the plate member and a second facing portion facing the circuit board,
The conducting member is configured to include the case member that is subjected to conductive coating over the first facing portion and the second facing portion, and the second facing portion serves as the reference potential portion of the circuit board. 2. The electronic device according to claim 1, wherein the first opposing portion is electrically connected to the reference potential portion of the circuit board through the conductive coating by being brought into contact therewith.   The said conduction | electrical_connection member is arrange | positioned between the outer peripheral site | part of the said plate member, and the said reference electric potential part of the said circuit board, and is comprised with the elastic conduction | electrical_connection member which can be elastic. Electronics. The conducting member is composed of a flexible conducting member having flexibility,
The flexible conductive member is arranged such that one end side thereof is opposed to the outer peripheral portion of the plate member, the other end side is arranged to face the reference potential portion of the circuit board, and the portion facing the reference potential portion is the The electronic apparatus according to claim 1, wherein the electronic apparatus is in contact with a reference potential portion. The housing is configured to include a case member,
The electronic device according to claim 4, wherein the case member has a protruding portion that protrudes toward the circuit board at a position facing the reference potential portion with which the flexible conductive member abuts.   6. The electronic device according to claim 1, wherein the metal coating member is arranged to extend to an outer peripheral side from an outer peripheral end portion of the film member and a part thereof is exposed. .   The electronic device according to any one of claims 1 to 6, wherein the conductive member is disposed to face an outer peripheral portion of the plate member on a position where the electronic component is disposed on the circuit board. machine.   The electronic device according to claim 1, wherein the conducting member is conducted at a plurality of locations to a reference potential portion of the circuit board.

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