JP2008244353A - Electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of reducing the thickness and improving the strength in an opening periphery. <P>SOLUTION: A portable telephone set 1 has a second casing 5 and an electronic circuit, arranged in the second casing 5; the second casing 5 is made of resin, containing a resin part 55 in which a sound collecting opening 55h is formed, and a sheet metal part 57, made of metal having higher elastic coefficient than that of the resin, embedded in the resin part 55 in at least the periphery of the sound-collecting opening 55h, and formed with a sound collecting opening 57h, at a position overlapping the sound-collecting opening 55h. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic device such as a mobile phone, a digital camera, a PDA, and a game machine.

In an electronic device such as a mobile phone, an opening is formed in a housing for various purposes. For example, in the mobile phone disclosed in Patent Document 1, a sound emitting hole for outputting the sound of a speaker to the outside of the housing, a sound collecting hole for inputting sound outside the housing to a microphone, and a key top are provided. An opening for exposure to the outside of the body is formed. Note that the mobile phone of Patent Document 1 includes a sheet metal in which batteries are stacked and an edge portion is embedded in a housing.
JP-A-2005-318160

  When the opening is formed in the housing, stress concentrates around the opening when the housing receives a load. Therefore, cracks are likely to occur around the opening. In particular, in an electronic device that can be opened and closed such as a foldable mobile phone, a relatively large load tends to be frequently applied in the vicinity of a connecting portion that connects two housings with an opening and closing operation or the like, and there is an opening near the connecting portion. If formed, cracks are likely to occur. However, if the stress is dispersed by increasing the thickness of the casing around the opening, it is difficult to reduce the thickness of the casing.

  The objective of this invention is providing the electronic device which can aim at thickness reduction and the strength improvement in opening periphery.

  An electronic apparatus according to the present invention includes a housing and an electronic circuit disposed in the housing, and the housing is formed of a first material and has a first opening. And a second material having a higher elastic coefficient than the first material, embedded in the first casing member at least around the first opening, and a second opening is formed at a position overlapping the first opening. And a second housing member.

  Preferably, an electroacoustic conversion component having the first opening and the second opening as at least part of a sound path is provided.

  Preferably, an electro-optical conversion component having the first opening and the second opening as at least a part of an optical path is provided, and the second material has a light shielding property higher than that of the first material.

  Preferably, the housing includes another housing connected to one end of the housing so as to be openable and closable with respect to the housing, and the first opening and the second opening are on the one end side of the housing. Is formed.

  Preferably, a circuit board disposed on the one end side in the casing, an electrical component disposed on the other end side of the casing with respect to the circuit board in the casing, and the circuit board And a microphone facing the first opening and the second opening.

  Preferably, a switch board disposed in the housing, a switch mounted on the switch board, and a key top for pressing the switch, the first housing member includes the A first key opening for exposing the key top is formed, and a second key opening for exposing the key top is formed in the second housing member at a position overlapping the first key opening. .

  Preferably, the first material has insulating properties, the second material has conductivity, and the second housing member is connected to the ground of the electric circuit.

  Preferably, the first material is a resin and the second material is a metal.

  According to the present invention, it is possible to reduce the thickness of the electronic device and improve the strength around the opening.

  FIG. 1 is a perspective view showing an appearance of a mobile phone 1 as an electronic apparatus according to an embodiment of the present invention.

  The mobile phone 1 is configured as a so-called foldable mobile phone, and includes a first housing 3 and a second housing 5 that are connected so as to be openable and closable. The first housing 3 and the second housing 5 are connected by a connecting portion 7. The first housing 3 and the second housing 5 are rotatable around the rotation axis RA. FIG. 1 shows an open state.

  The first casing 3 and the second casing 5 constitute the casing of the entire mobile phone 1. The first housing 3 and the second housing 5 are each formed, for example, in a generally thin rectangular parallelepiped shape, and are overlapped with each other in the closed state so that their contours substantially coincide with each other.

  The first housing 3 is provided with, for example, a sound outlet 9 of a speaker 97 for calling (see FIG. 11) and a display unit 11 for displaying an image including graphic information and character information. The sound emission opening 9 is opened at the facing surface portion 3 a facing the second housing 5 in the closed state at the end of the first housing 3 on the side opposite to the connecting portion 7. The display unit 11 is configured by, for example, a liquid crystal display or an organic EL display, and displays an image on the facing surface portion 3a. The facing surface portion 3a is parallel to the rotation axis RA.

  The second housing 5 is provided with, for example, a sound collection port 13 of a microphone 39 for calling (see FIG. 2) and an operation unit 15 that receives a user operation. The sound collection port 13 is opened at the facing surface portion 5 a facing the first housing 3 at the end of the second housing 5 on the connecting portion 7 side. The operation unit 15 has a plurality of dial keys 17A, a cursor key 17B, a determination key 17C, and a plurality of function keys 17D exposed to the outside of the casing on the facing surface portion 5a (hereinafter simply referred to as “key top 17 without distinguishing them). Is sometimes included.). The facing surface portion 5a is parallel to the rotation axis RA.

  The connecting portion 7 includes, for example, a first end 3d that is one end in the longitudinal direction of the first housing 3 and a second end 5d that is one end in the longitudinal direction of the second housing 5. It is comprised including. Specifically, it is as follows. A connecting recess 3 e is formed in the first end 3 d of the first housing 3. A connecting projection 5 e is formed at the second end 5 d of the second housing 5. The connection protrusion 5e is inserted into the connection recess 3e. On both sides of the connecting projection 5e in the direction of the rotational axis RA, hinge parts 8A and 8B as shaft parts (see FIG. 2) are provided on the surfaces of the connecting projection 5e and the connecting recess 3e facing each other in the direction of the rotational axis RA. Hereinafter, these are simply referred to as “hinge parts 8”, which may not be distinguished from each other. The hinge parts 8A and 8B include, for example, a portion inserted into the connection protrusion 5e, and a portion inserted into the connection recess 3e that can rotate about the rotation axis RA with respect to the portion, although not particularly illustrated. It is comprised.

  FIG. 2 is an exploded perspective view of the second housing 5.

  In the second housing 5, the key plate 21, the front case 23, the key assembly 25, the shield assembly 27, the circuit board 29 and the battery 31, the rear case 33, and the battery lid 35 are arranged in this order from the upper side in FIG. Are stacked. The circuit board 29 and the battery 31 are arranged in parallel in the stacking direction. That is, the circuit board 29 and the battery 31 are not stacked.

  The second housing 5 includes a key plate 21, a front case 23, a rear case 33, and a battery lid 35. The key plate 21, the rear case 33, and the battery lid 35 are made of, for example, an insulating resin. The material of the front case 23 will be described later. The facing surface portion 5 a of the second housing 5 is composed of a key plate 21 and a front case 23. An outer peripheral surface portion 5 c (FIG. 1) surrounding the opposing surface portion 5 a of the second housing 5 is constituted by a front case 23 and a rear case 33. A back surface portion 5 b (FIG. 1) on the opposite side of the facing surface portion 5 a of the second housing 5 is constituted by a rear case 33 and a battery lid 35. The connecting protrusion 5 e that forms the connecting portion 7 is formed on the front case 23.

  The front case 23 and the rear case 33 are formed in a rectangular shape having substantially the same area. The front case 23 and the rear case 33 are fixed to each other, for example, by screwing a screw (not shown) inserted into one (for example, the rear case 33) into a screw boss 23a formed on the other (for example, the front case 23). Is done. The key assembly 25, the shield assembly 27, and the circuit board 29 are sandwiched between the front case 23 and the rear case 33 when the front case 23 and the rear case 33 are fixed to each other. Fixed. In the rear case 33, an opening 33a for inserting the battery 31 is formed. The battery 31 is inserted into the second housing 5 from the opening 33a, and the battery lid 35 is engaged with the rear case 33 so as to close the opening 33a, so that the battery 31 is mounted in the second housing 5. A recess 33b for placing the antenna 89 (see FIG. 11) is formed at the end of the rear case 33 opposite to the connecting portion 7 from the opening 33a (left side in FIG. 2).

  The circuit board 29 is constituted by, for example, a printed wiring board based on a hard resin. For example, the circuit board 29 is formed in a rectangular shape that is approximately half as wide as the second housing 5. Various electronic components are arranged on the circuit board 29 to constitute an electronic circuit. For example, on the first mounting surface 29 a on the front case 23 side of the circuit board 29, various ICs 37 and a microphone 39 for calling are provided. An informing speaker 99 (see FIG. 11) and a camera module 95 (see FIG. 11) are provided on the second mounting surface 29b of the circuit board 29 on the rear case 33 side. A power receiving terminal portion 41 connected to the battery 31 is provided at an end portion of the circuit board 29 on the battery 31 side. On the first mounting surface 29a and the second mounting surface 29b of the circuit board 29, a ground pattern layer 29c (only a part of which is shown) constituting the ground line of the circuit board 29 (electronic circuit) is arranged in a predetermined pattern. Yes.

  The microphone 39 is formed in a generally disc shape, for example. The microphone 39 is disposed with the sound collection surface 39a facing the front case 23 and the terminal surface 39b facing the circuit board 29. The microphone 39 may be fixed to the circuit board 29 by an appropriate method. For example, the microphone 39 is fixed to the circuit board 29 by soldering. Although not specifically illustrated, the microphone 39 includes, for example, a diaphragm that vibrates in response to sound, and a coil and a magnet that convert vibrations of the diaphragm into an electric signal, and the sound input from the sound collection surface 39a. Is converted into an electrical signal, and the electrical signal is output to the circuit board 29 from a terminal (not shown) arranged on the terminal surface 39b.

  The power receiving terminal portion 41 includes, for example, spring terminals 41p and 41n protruding to the battery 31 side. On the other hand, a planar power supply terminal (not shown) is provided on the surface 31a of the battery 31 on the circuit board 29 side. When the battery 31 is mounted on the second housing 5 in a state where the second housing 5 is assembled, the spring terminals 41p and 41n abut on a power supply terminal (not shown) provided on the surface 31a. In addition, power can be supplied from the battery 31 to the circuit board 29.

  For example, the battery 31 is formed in a thin rectangular parallelepiped shape that is approximately half as wide as the second housing 5. The battery 31 has a case 31b formed of resin or the like. In the case 31b, although not particularly illustrated, for example, a battery cell in which a positive electrode and a negative electrode are stacked with a separator interposed therebetween, and a circuit board that is connected to the positive electrode and the negative electrode of the battery cell and includes a power supply terminal, a protection circuit, and the like are provided. It has been.

  The shield assembly 27 includes a shield case 43 that covers the circuit board 29 and the like, and an FPC (flexible printed wiring board) 45 as a switch board disposed on the front case 23 side of the shield case 43.

  The shield case 43 is made of metal, for example. The shield case 43 is formed in a rectangular shape having substantially the same area as the second housing 5. The shield case 43 is formed in a box shape having a concave on the circuit board 29 side. Although not particularly illustrated, the surface on the circuit board 29 side of the shield case 43 is provided with a rib that surrounds the plurality of electronic components on the first mounting surface 29a of the circuit board 29 such as the IC 37. . The rib contacts the ground pattern layer 29c provided on the first mounting surface 29a. As a result, the shield case 43 is electrically connected to the ground line of the circuit board 29. Note that the microphone 39 is disposed in an area of the circuit board 29 where the shield case 43 is not covered.

  For example, the FPC 45 is formed in a rectangular shape having an area substantially equal to the shield case 43. The FPC 45 is fixed to the shield case 43 by appropriate fixing means such as solder, double-sided tape, and adhesive. The FPC 45 has an extending portion 45 a extending from a portion placed on the shield case 43, and a connector (not shown) provided on the extending portion 45 a is provided on the circuit board 29. By being connected to the connector, the FPC 45 and the circuit board 29 are electrically connected.

  On the mounting surface of the FPC 45 on the front case 23 side, for example, a plurality of switches 47 and a plurality of LEDs 49 as light emitting elements are provided.

  The plurality of switches 47 are provided corresponding to the plurality of key tops 17. That is, the plurality of switches 47 are provided so as to be pressed by the plurality of key tops 17 at positions overlapping the plurality of key tops 17. The plurality of switches 47 basically correspond to one switch 47 for one key top 17. However, four switches 47 correspond to the cursor key 17B.

  The plurality of switches 47 are constituted by, for example, dome switches, and have a dome-shaped movable contact and a fixed contact facing the movable contact, although not particularly illustrated. When the switch 47 is pressed, the movable contact comes into contact with the fixed contact and is turned on. When the switch 47 is released, the switch 47 returns to the off state by the restoring force of the movable contact. A signal generated by turning on / off the switch 47 is output to the circuit board 29 via the FPC 45.

  The plurality of LEDs 49 are for illuminating the plurality of key tops 17, and are disposed between the plurality of switches 47, for example. The plurality of LEDs 49 are driven by electric power supplied from the battery 31 via the FPC 43 and the circuit board 29. The operations (lighting and extinguishing) of the plurality of LEDs 49 are controlled according to the open / close state of the mobile phone 1 by a control unit (CPU 85; see FIG. 11) provided on the circuit board 29, for example.

  FIG. 3 is an exploded perspective view of the key assembly 25. However, FIG. 3 shows an outline of the configuration of the key assembly 25, and each part such as a positioning part for positioning the key assembly 25 in the second housing 5 is appropriately omitted.

  The key assembly 25 includes, for example, a key sheet 51 that covers the plurality of switches 47 and the plurality of LEDs 49, a frame 53, and a plurality of key tops 17 in order from the rear case 33 side (the lower side in FIG. 3). (See also FIG. 1).

  The key sheet 51 is made of an elastic material such as silicon rubber, for example. The key sheet 51 has translucency and can transmit light from the LED 49. Although FIG. 3 illustrates the case where the key sheet 51 is configured by a single sheet, the key sheet 51 may be configured by stacking two or more sheets. The key sheet 51 is formed in, for example, a rectangular shape having a width that can cover the arrangement area of the plurality of switches 47. On the surface of the key sheet 51 on the front case 23 side, a plurality of pedestal portions 52A to 52D (hereinafter simply referred to as “pedestal portions 52”) for fixing the plurality of key tops 17 projecting to the front case 23 side. These may not be distinguished.) Is formed. On the surface of the key sheet 51 on the FPC 45 side, there are formed pushers 51a (see FIG. 9B) that project to the FPC 45 side and that are used to press the plurality of switches 47. The pedestal 52 and the pusher 51a are provided at the positions where the plurality of switches 47 are arranged.

  The frame 53 is made of metal, for example. The frame 53 is generally formed in a plate shape having an area equivalent to the arrangement area of the dial key 17A (pedestal portion 52A). The frame 53 is provided with a plurality of openings 53a into which the pedestal portion 52A of the key sheet 51 is inserted when the frame 53 is laminated on the surface of the key sheet 51 on the front case 23 side.

  The plurality of key tops 17 are fixed to the pedestal portion 52 of the key sheet 51 with an appropriate fixing member such as an adhesive. Specifically, the plurality of dial keys 17A are fixed to the same number of pedestal portions 52A as the plurality of dial keys 17A inserted into the openings 53a of the frame 53, and the cursor keys 17B are arranged in four directions. The determination key 17C is fixed to the pedestal portion 52C, and the plurality of function keys 17D are fixed to the same number of pedestal portions 52D as the plurality of function keys 17D.

  4A is a plan view of the front case 23, FIG. 4B is a cross-sectional view taken along line IVb-IVb of FIG. 4A, and FIG. 4C is FIG. Is a cross-sectional view taken along line IVc-IVc.

  The front case 23 is formed of resin as a first material, a resin part 55 as a first housing member, and a metal as a second material, and a part of the front case 23 is embedded in the resin part 55. 2 having a sheet metal part 57 as a housing member.

  The metal constituting the sheet metal part 57 has a higher elastic coefficient than the resin constituting the resin part 55. Although the resin constituting the resin part 55 has a light shielding property, it slightly transmits light, whereas the metal constituting the sheet metal part 57 completely blocks light. That is, the material constituting the sheet metal part 57 has a higher light shielding property than the material constituting the resin part 55. The resin constituting the resin part 55 has insulation, whereas the metal constituting the sheet metal part 57 has conductivity.

  The resin portion 55 includes a facing surface configuration portion 55 a that configures the facing surface portion 5 a of the second housing 5, and an outer peripheral surface configuration portion 55 b that configures the outer peripheral surface portion 5 c of the second housing 5. A key opening 56 for exposing the plurality of key tops 17 to the outside of the second housing 5 is formed in the facing surface constituting portion 55a. For example, only one key opening 56 is formed for all of the plurality of dial keys 17A, the cursor key 17B, the enter key 17C, and the plurality of function keys 17D.

  5A is a perspective view of the sheet metal portion 57, FIG. 5B is an enlarged view of a region Vb in FIG. 5A, and FIG. 5C is a view in FIG. It is an enlarged view of the area | region Vc.

  The sheet metal portion 57 includes a base portion 57a that constitutes the facing surface portion 5a of the second housing 5, and a connecting portion-side folded portion 57b and a side surface-side folded portion 57c that extend from the edge of the base portion 57a in a direction intersecting the base portion 57a. is doing.

  The base 57a is formed with a plurality of key openings 58A, 58BC, 58D (hereinafter simply referred to as “key openings 58”, which may not be distinguished from each other) for exposing the plurality of key tops 17. ing. For example, one key opening 58A is provided corresponding to the plurality of dial keys 17A, and one key opening 58BC is provided corresponding to the cursor key 17B and the determination key 17C. A total of two openings 58D are provided corresponding to the two function keys 17D. As shown in FIG. 4, the key opening 58 of the sheet metal portion 57 has a smaller diameter than the key opening 56 of the resin portion 55. The plurality of key openings 58 are provided at positions overlapping the key openings 56.

  As shown in FIGS. 5A and 5B, the connecting portion side folded portion 57b has the key top 17 from the edge on the connecting portion 7 side (upper right side in FIG. 5A) of the base portion 57a. It extends to the exposed side (upper side in FIG. 5A). The length of the connecting portion side folded portion 57b along the edge of the base portion 57a is set to be shorter than the length of the connecting protrusion 5e of the connecting portion 7 in the direction of the rotation axis RA. In addition, the angle with respect to the base 57a of the connection part side folding | returning part 57b may be set suitably.

  As shown in FIGS. 5 (a) and 5 (c), the side-side folded portion 57c extends from the edge of the side surface (upper left or lower left in FIG. 5 (a)) of the base 57a. It extends to the back side (the lower side in FIG. 5A). The side surface side folded portion 57c is formed across the edge portion on the side surface side of the base portion 57a. In addition, the angle with respect to the base 57a of the side surface side folding | returning part 57c may be set suitably.

  FIG. 6 is a plan view of the front case 23 showing the overlap between the resin portion 55 and the sheet metal portion 57. In the drawing, the white portion is a portion of only the resin portion 55, the hatched portion is a portion of only the sheet metal portion 57, and the black portion is an overlapping portion of the resin portion 55 and the sheet metal portion 57. In the overlapping part of the resin part 55 and the sheet metal part 57, the sheet metal part 57 is basically embedded in the resin part 55.

  As shown in FIGS. 4 and 6, the sheet metal portion 57 has an outer peripheral portion embedded in the resin portion 55 over the entire circumference. Specifically, the outer peripheral portion of the base portion 57a, the connecting portion side folded portion 57b, and the side surface side folded portion 57c are embedded in the resin portion 55. Note that the base portion 57 a of the sheet metal portion 57 has the same size as the opposing surface constituting portion 55 a of the resin portion 55. The center side of the base portion 57 a of the sheet metal portion 57 is exposed to the outside of the resin portion 55 from the key opening 56 of the resin portion 55. Specifically, the outer peripheral portions of the key openings 58 of the sheet metal portion 57 are exposed.

  FIG. 7A is an enlarged view of the region VIIa in FIG. 4B, and FIG. 7B is an enlarged view of the region VIIb in FIG. 4C.

  As shown in FIG. 7A, the end of the base portion 57a of the sheet metal portion 57 on the connecting portion 7 side (the upper side in FIG. 7A) is embedded in the facing surface constituting portion 55a of the resin portion 55. The connecting portion side folded portion 57 b is embedded in the connecting protrusion 5 e that constitutes the connecting portion 7. The connecting portion side folded portion 57b extends from the base portion 57a to the protruding side of the connecting protrusion 5e (the left side in FIG. 7A). Accordingly, the height from the base portion 57a of the connecting portion side folded portion 57b is larger than the thickness of the opposing surface constituting portion 55a from the base portion 57a to the protruding side of the connecting projection portion 5e, but the end portion side folded portion 57b is The resin part 55 is not exposed outside.

  As shown in FIG. 7 (b), the end of the side surface side (right side of FIG. 7 (b)) of the base portion 57a of the sheet metal portion 57 is embedded in the opposing surface constituting portion 55a of the resin portion 55, and the side surface side The folded portion 57c is embedded in the outer peripheral surface constituting portion 55b. The outer peripheral surface constituting portion 55b extends from the facing surface constituting portion 55a to the inside of the housing (the lower side of FIG. 7B), and the side surface side folded portion 57c extends from the base 57a to the inside of the housing. Accordingly, the height of the side surface side folded portion 57c from the base portion 57a is larger than the thickness of the opposing surface constituting portion 55a from the base portion 57a to the inside of the housing, but the side surface side folded portion 57c is outside the resin portion 55. Not exposed.

  The front case 23 as described above is configured by, for example, so-called insert molding. Specifically, first, the sheet metal part 57 is formed. The sheet metal part 57 is formed, for example, by performing a pressing process such as a punching process, a bending process, and a drawing process on a single sheet metal. Next, the sheet metal part 57 is disposed in the cavities of the pair of molds of the injection molding machine and is sandwiched between the pair of molds. The front case 23 is formed by injecting and filling molten resin to be the resin portion 55 into the cavity.

  In insert molding, since the sheet metal part 57 is sandwiched between a pair of molds, a portion exposed from the resin part 55 is necessarily generated in the sheet metal part 57 without being embedded in the resin part 55. On the other hand, even if the front case 23 is configured only by the resin portion 55, the pair of molds have portions that contact each other in order to form the key opening 56. That is, one or both of the pair of molds is provided with a column portion that protrudes in the mold opening / closing direction and contacts the other mold, and has the same cross-sectional shape as the key opening 56. In the front case 23, the portion of the sheet metal portion 57 exposed from the key opening 56 of the resin portion 55 is a portion sandwiched by a pair of molds, so that the key opening 56 of the resin portion 55 is formed. This column portion also serves as a portion for sandwiching the sheet metal portion 57, and insert molding is suitably performed.

  FIGS. 8A and 8B are diagrams for explaining the arrangement of the circuit board 29 and the battery 31 in the second housing 5. FIG. 8A is a plan view of the second housing 5, and FIG. FIG. 6 is a side view of the housing 5.

  The circuit board 29 is disposed in a stacked manner with respect to the facing surface portion 5 a in the second housing 5. The battery 31 is disposed at a position that overlaps the facing surface portion 5 a and does not overlap the circuit substrate 29 in the stacking direction of the circuit substrate 29 with respect to the facing surface portion 5 a. Specifically, the circuit board 29 and the battery 31 are in the longitudinal direction of the second housing 5 (the left-right direction in FIG. 8, the direction from the end side connected to the first housing 3 to the other end side). Is arranged. On the other hand, the circuit board 29 and the battery 31 each contribute to reinforcement of the bending rigidity of the second housing 5. Therefore, at the boundary position between the circuit board 29 and the battery 31 indicated by the solid line L1, the bending rigidity of the second housing 5 is reduced as compared with other portions.

  As can be seen from FIGS. 2, 4, 6, and 8, the resin portion 55 and the sheet metal portion 57 straddle the circuit board 29 and the battery 31. Since the sheet metal part 57 has a higher elastic coefficient than that of the resin, it is possible to prevent the bending of the solid line L1 while reducing the thickness of the front case 23 as compared with the case where the front case 23 is configured only by the resin.

  9A is a cross-sectional view taken along the line IXa-IXa in FIG. 1, and FIG. 9B is an enlarged view in the region IX in FIG. 9A. In FIG. 9A, members such as the key sheet 51 are omitted as appropriate for easy illustration.

  As described above, in the second housing 5, the circuit board 29, the shield case 43, the FPC 45, the key sheet 51, and the front case 23 are stacked from the rear case 33 side (the lower side in the drawing). The key top 17 is exposed to the outside of the second housing through the key opening 56 of the resin portion 55 of the front case 23 and the key opening 58 of the sheet metal portion 57. The key plate 21 is laminated on a portion of the sheet metal portion 57 exposed from the key opening 58 of the resin portion 55, and is fixed to the sheet metal portion 57 with an appropriate fixing member such as a double-sided tape or an adhesive.

  As for the resin part 55 of the front case 23, the outer peripheral surface constituting part 55b is in contact with the rear case 33, the shield case 43, and the like. A portion of the sheet metal portion 57 exposed from the key opening 56 of the resin portion 55 (a portion on the inner peripheral side of the key opening 56 and a portion between the plurality of key openings 58) is in contact with the key sheet 51. ing. That is, the sheet metal part 57 holds the key sheet 51.

  As shown in FIGS. 2 and 3, since the frame 53 is laminated on the front case 23 side of the key sheet 51 in the arrangement area of the dial key 17A, the key opening of the resin part 55 of the sheet metal part 57 is provided. Among the portions exposed from 56, the outer peripheral portion of the key opening 58 </ b> A contacts the outer peripheral portion of the frame 53. That is, the sheet metal part 57 holds the frame 53.

  As described above, the sheet metal part 57 contributes to the locking of the key assembly 25 as the operation member including the key top 17. An engaged portion may be provided on the outer peripheral portion of the key top 17, and the key top 17 may be locked by the sheet metal portion 57.

  As shown in FIGS. 2 and 3, the frame 53 is formed with an extending portion 53 b that contacts the shield case 43. Further, as described above, the sheet metal portion 57 is in contact with the frame 53. Therefore, the sheet metal part 57 is electrically connected to the ground line of the circuit board 29 via the frame 53 and the shield case 43.

  As shown in FIG. 9B, the LED 49 is located on the inner side of the second housing 5 with respect to the key top 17. The key top 17 is illuminated with light from the LED 49. For example, the key top 17 is formed of a resin having translucency, and is illuminated by the LED 49 from the inside of the second housing 5. Further, for example, the key top 17 is illuminated by light leaking from the gap around the key top 17 to the outside of the second housing. Here, the side-side folded portion 57c of the sheet metal portion 57 extends from the base portion 57a to the FPC 45 side and covers the side of the LED 49 (FPC 45). Therefore, the light traveling from the LED 49 toward the outer peripheral side of the arrangement region of the key top 17 is shielded by the side surface side folded portion 57c.

  FIG. 10 is a cross-sectional view taken along line XX in FIG. That is, it is a cross-sectional view of the sound collection port 13 for the microphone 39 (FIG. 2).

  As shown in FIG. 4A, FIG. 6, and FIG. 10, the sheet metal part 57 extends to the position where the sound collection port 13 is arranged. As shown in FIG. 10, the sound collection opening 55 h is formed in the resin portion 55, and the sound collection opening 57 h is formed at a position of the sheet metal portion 57 that overlaps the sound collection opening 55 h of the resin portion 55. Thus, the sound collection port 13 is configured. The microphone 39 is arranged with the sound collection surface 39 a facing the sound collection port 13, and the sound outside the housing reaches the microphone 39 through the sound collection port 13. That is, the sound collection port 13 is an example of a sound path that communicates between the outside of the housing and the microphone 39.

  The sound collection opening 57h of the sheet metal part 57 is formed by punching before the resin part 55 is injection molded, for example. The sound collection opening 55h of the resin portion 55 is formed at the time of injection molding of the resin portion 55, for example. Specifically, for example, a column portion having the same shape as the sound collection opening 55 h provided in the cavity of the pair of molds and protruding in the opening and closing direction of the mold is formed in the sound collection opening 57 h of the sheet metal portion 57. It is formed by performing injection molding in the inserted state.

  10 illustrates the case where the diameter of the sound collection opening 55h of the resin portion 55 is smaller than the diameter of the sound collection opening of the sheet metal portion 57, the sound collection opening 55h of the resin portion 55 is illustrated. The diameter may be the same as the diameter of the sound collection opening of the sheet metal part 57 or may be larger than the diameter of the sound collection opening of the sheet metal part 57. When the diameter of the sound collection opening 55h of the resin portion 55 is the same as the diameter of the sound collection opening 57h of the sheet metal portion 57, a mold for forming the sound collection opening 55h of the resin portion 55 is provided. What is necessary is just to let the pillar part provided be the shape and magnitude | size which fit in the sound collection opening 57h of the sheet-metal part 57. FIG. Further, when the diameter of the sound collection opening 55 h of the resin portion 55 is made larger than the diameter of the sound collection opening of the sheet metal portion 57, as in the formation of the key opening 56 of the resin portion 55, Injection molding may be performed by sandwiching the outer peripheral portion of the sound collection opening 57h of the sheet metal portion 57 with a pillar portion having the same shape as the sound collection opening 55h protruding in the opening and closing direction.

  FIG. 11 is a block diagram showing the configuration of the signal processing system of the mobile phone 1.

  The cellular phone 1 includes a CPU 85, a memory 86, a communication processing unit 87, an acoustic processing unit 91, and an image processing unit 93. Each of these parts is constituted by an IC 37 provided on the circuit board 29, for example.

  The CPU 85 and the memory 86 function as a control unit that performs predetermined calculations based on signals from various units such as the operation unit 15 and controls various units such as the image processing unit 93.

  The communication processing unit 87 includes a high frequency circuit. The communication processing unit 87 modulates various data such as acoustic data and image data processed by the CPU 85 and transmits the data via the antenna 89 in order to perform long-distance wireless communication using radio waves. Further, the communication processing unit 87 demodulates the signal received via the antenna 89 and outputs the demodulated signal to the CPU 85.

  The acoustic processing unit 91 converts the acoustic data from the CPU 85 into an electrical signal and outputs the electrical signal to the speaker 97 for calling and the speaker 99 for notifying incoming calls. The speaker 97 and the speaker 99 convert the electrical signal from the sound processing unit 91 into sound and output the sound. On the other hand, the microphone 39 converts the input sound into an electric signal and outputs it to the sound processing unit 91. The acoustic processing unit 91 converts the electrical signal from the microphone 39 into acoustic data and outputs it to the CPU 85.

  The image processing unit 93 converts the image data from the CPU 85 into an image signal and outputs the image signal to the display unit 11. Further, the imaging signal (image data) output from the predetermined camera module 95 is converted into image data of a predetermined format and output to the CPU 85.

  According to the embodiment described above, the mobile phone 1 includes the second housing 5 having the facing surface portion 5a as the predetermined surface portion, and the circuit disposed in the second housing 5 so as to be stacked with respect to the facing surface portion 5a. In the second housing 5, there is provided a battery 31 as an electrical component that is disposed at a position that overlaps the opposing surface portion 5 a and does not overlap the circuit substrate 29 in the stacking direction of the opposing surface portion 5 a and the circuit board 29. The second housing 5 is formed of resin as the first material, constitutes at least a part of the opposing surface portion 5a, and the resin portion 55 as the first housing member straddling the circuit board 29 and the battery 31. It is formed of a metal as the second material having a higher elastic coefficient than that of the resin, constitutes at least a part of the opposed surface part 5a, is at least partially embedded in the resin part 55, and straddles the circuit board 29 and the battery 31. Since it has the sheet metal part 57 as the second casing member, as described with reference to FIG. 8, the opposing surface part 5 a can be thinned without reducing the bending rigidity between the circuit board 29 and the battery 31. As a result, the thickness and size of the second housing 5 can be reduced.

  The sheet metal portion 57 includes a base portion 57a that constitutes the facing surface portion 5a, and a side-side folded portion 57c that extends from the edge portion of the base portion 57a that extends from the circuit board 29 side to the battery 31 so as to intersect the base portion 57a. For this reason, the second moment of the section between the circuit board 29 and the battery 31 is high, and the bending rigidity can be effectively improved.

  The cellular phone 1 includes an FPC 45 as a switch board disposed between the circuit board 29 and the battery 31 and the facing surface portion 5a, a plurality of switches 47 disposed on the surface of the FPC 45 on the facing surface portion 5a side, A key assembly 25 as an operation member including a plurality of key tops 17 for pressing the switch 47, and the resin portion 55 is formed with a key opening 56 for exposing the plurality of key tops 17 to form a sheet metal. Since the key openings 58 that expose the plurality of key tops 17 are formed in the portion 57 so as to overlap the key openings 56 of the resin portion 55, the sheet metal portion 57 is connected to the circuit board 29, the battery 31, and the like. In addition to the reinforcement between the two, the exposed surface of the key top 17 to which a load is easily applied by the user's operation is reinforced, and the reinforcement is effectively performed.

  In the mobile phone 1, the key opening 58 of the sheet metal part 57 has a smaller diameter than the key opening 56 of the resin part 55, and the sheet metal part 57 is exposed from the resin part 55 in the key opening 56. The portion exposed from the resin portion 55 in the key opening 56 of the resin portion 55 locks the key assembly 25 via the key sheet 51 or the like, so that the strength necessary for locking the key assembly 25 is secured. However, the area and thickness for locking the key assembly 25 can be reduced. In addition, since the portion of the sheet metal portion 57 that is necessary for insert molding is secured in the portion exposed in the key opening 56 of the resin portion 55, the pair of molds is secured. The column portion protruding in the mold opening / closing direction for forming the key opening 56 of the resin portion 55 also serves as a portion for sandwiching the sheet metal portion 57, and insert molding is suitably performed.

  The cellular phone 1 has an LED 49 as a light emitting element for illumination of the key top 17 disposed on the surface of the FPC 45 on the facing surface portion 5a side, the sheet metal portion 57 constitutes the facing surface portion 5a, and the key opening 58 is provided. The metal constituting the sheet metal part 57 has a light shielding property higher than that of the resin constituting the resin part 55, having the formed base part 57a and the side-side folded part 57c extending from the edge part of the base part 57a to the FPC 45 side. Therefore, the sheet metal part 57 not only reinforces the strength of the second housing 5 but also prevents the light from the LED 49 toward the side of the FPC 45 from passing through the side surface of the second housing 5. Contributes and is used effectively.

  In other words, the mobile phone 1 has the LED 49 disposed in the second housing 5, and the resin portion 55 has a key as a translucent opening for emitting the light of the LED 49 to the outside of the second housing 5. A key opening 58 is formed in the sheet metal portion 57 as a light-transmitting opening for emitting the light of the LED 49 to the outside of the second housing 5 at a position overlapping the key opening 56 of the resin portion 55. The metal that is formed and that constitutes the sheet metal part 57 has a higher light shielding property than the resin that constitutes the resin part 55, so that the light of the LED 49 can be moved from an unintended position (such as a position other than the translucent opening) to the second housing. Injection to the outside of the body 5 can be prevented, and the sheet metal part 57 is effectively used.

  In the mobile phone 1, the resin constituting the resin part 55 has insulation, the metal constituting the sheet metal part 57 has conductivity, and the sheet metal part 57 is connected to the ground of the circuit board 29. Basically, an opening for exposing the key top 17, an opening for emitting light from the LED 49, a sound collection port 13 of the microphone 39, etc. while insulating the outside of the housing from the inside of the housing by the resin portion 55. Static electricity that is about to enter the second housing 5 from the opening can flow to the ground via the sheet metal part 57. Therefore, the sheet metal part 57 contributes not only to the reinforcement of the second housing 5 but also to the prevention of intrusion of static electricity, and is effectively used.

  The mobile phone 1 has a first housing 3 connected to one end of a second housing 5 so as to be rotatable about a rotation axis RA parallel to the facing surface portion 5a. The body 3 refers to a connection protrusion 5e formed in one housing (second housing 5) inserted into a connection recess 3e formed in the other housing (first housing 3). On both sides in the direction of the rotation axis RA of 5e, hinge parts 8 as shaft parts are inserted into mutually opposing surfaces of the connection protrusion 5e and the connection recess 3e, and are connected rotatably around the rotation axis RA. Therefore, a bending moment with the axis orthogonal to the rotation axis RA as the rotation axis is applied to the second housing 5 due to the loads on both sides of the connecting protrusion 5e. On the other hand, the sheet metal part 57 has a base part 57a on the side of the connecting part 7 of the second housing 5 in a range where it overlaps with the base part 57a constituting the opposing surface part 5a and the connecting projection part 5e and the connecting recessed part 3e in the rotation axis RA direction. It has the connection part side folding | returning part 57b extended so that it may cross | intersect the base part 57a from an edge part. Therefore, the sheet metal part 57 contributes not only to the reinforcement between the circuit board 29 and the battery 31 but also to the reinforcement of the connecting part 7 by the connecting part side folded part 57b, and is used effectively.

  The mobile phone 1 has a second housing 5 and an electronic circuit disposed in the second housing 5, and the second housing 5 is formed of a resin as a first material and has a first opening. For example, the resin portion 55 formed with the sound collection opening 55h and the key opening 56 and a metal as a second material having a higher elastic coefficient than the resin, and at least around the first opening, the resin portion 55 is formed. And a sheet metal part 57 in which a second opening (for example, a sound collection opening 57h and a key opening 58) is formed at a position overlapping with the first opening, damage due to stress concentration around the opening Is prevented.

  The sound collection opening 55h of the resin portion 55 and the sound collection opening 57h of the sheet metal portion 57 constitute a part of the sound path of the microphone 39 for calling as an electroacoustic conversion component. Here, in order to prevent the sound (noise) other than the call voice from being input to the call microphone, the sound from the sound collection opening 55h of the resin portion 55 and the sound collection opening 57h of the sheet metal portion 57 is used. It is preferable to prevent intrusion of sound into the second housing 5 from a portion other than the sound collection opening 55h and the sound collection opening 57h while allowing sound to enter the second housing 5. Since the sound collection opening 55h and the sound collection opening 57h are composed of the resin portion 55 and the sheet metal portion 57 having different elastic coefficients, they can block sounds having different frequencies from each other, and the sound collection opening 55h. Intrusion of sound into the second housing 5 from portions other than the sound collection opening 57h is effectively prevented. That is, the sheet metal part 57 not only reinforces the periphery of the opening constituting the sound path of the second housing 5, but also contributes to blocking unintended sound at a frequency different from that of the resin part 55. Used.

  The key opening 56 of the resin part 55 and the key opening 58 of the sheet metal part 57 constitute a part of the optical path of the LED 49 as an electro-optical conversion component. On the other hand, as described above, the metal constituting the sheet metal part 57 has higher light shielding properties than the resin constituting the resin part 55. Therefore, the sheet metal part 57 contributes not only to the reinforcement around the opening constituting the optical path but also to unintentional light blocking, and is used effectively.

  The mobile phone 1 has another case (first case 3) connected to the second end 5d of the second case 5 so that the second case 5 can be opened and closed. A load is applied to the connecting portion 7 as the mobile phone 1 is opened and closed. Therefore, the opening formed on the second end 5d side of the second housing 5 is damaged due to stress concentration as compared to the opening formed on the end opposite to the connecting portion 7. Cheap. However, in the mobile phone 1, since the sheet metal part 57 extends to the connecting part 7 side and forms an opening near the connecting part such as the sound collection opening 57h, damage on the connecting part 7 side is prevented.

  In general, the microphone (39) for a call is disposed at the end opposite to the connecting portion (7). However, in the cellular phone 1, the circuit board 29 is disposed on the connection portion 7 side and the battery 31 as an electrical component is disposed on the opposite side of the connection portion 7 in order to reduce the thickness of the housing. The telephone microphone 39 disposed on the circuit board 29 cannot be disposed at the end opposite to the connecting portion 7 but is disposed on the connecting portion 7 side. As a result, in the mobile phone 1, the sound pickup port 13 is formed on the connecting portion 7 side of the predetermined surface portion 5a, and a load accompanying opening and closing is easily applied. However, since the sound collection port 13 includes the sound collection opening 57h of the sheet metal portion 57, damage due to a load accompanying opening and closing is prevented.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The electronic device of the present invention is not limited to a mobile phone. For example, a digital camera, a PDA, a notebook computer, or a portable game machine may be used. Moreover, the housing | casing of the whole electronic device is not limited to what consists of a housing | casing and the other housing | casing connected with the said housing | casing. For example, it may have only one housing. Moreover, when the housing | casing of the whole electronic device is comprised from two or more housing | casing, the housing | casing of the said electronic device whole is not limited to a foldable thing. For example, a sliding type or revolver type casing may be used. In the case of a casing having a connecting protrusion and a connecting recess, the casing having the first casing member (resin part) and the second casing member (sheet metal part) is provided with a connecting recess instead of the connecting protrusion. May be.

  The predetermined surface portion configured by the first housing member and the second housing member is not limited to a surface portion provided with a surface portion or an operation portion facing another housing. For example, the back surface of the surface part provided with the surface part or operation part which opposes another housing | casing may be sufficient. It may be a surface portion on the display surface side of the housing in which the display device is provided.

  The electric components arranged in parallel in the circuit board and the circuit board stacking direction are not limited to batteries. For example, an antenna may be used.

  The operation member including the key top is not limited to a key sheet, a frame, and a key top. For example, it may be composed only of a key top, or may be composed of a key sheet and a key top. The key sheet and the key top may be integrally formed (the pedestal portion of the embodiment may function as the key top).

  The light emitting element is not limited to the LED for key top illumination. For example, it may be an LED that lights up when the power of the electronic device is turned on, or may be a camera flash.

  The opening reinforced by the second casing member (sheet metal part) is not limited to the sound collection port for the microphone and the key opening for the key top. For example, it may be an air inlet or outlet for cooling an electronic device, or may be a screw hole or a positioning hole for fixing a housing or the like. When the opening constitutes a part of the sound path, the electroacoustic conversion component that uses the opening as the sound path is not limited to the microphone. For example, a speaker may be used. When the opening constitutes a part of the optical path, the electro-optical conversion component that uses the opening as the optical path is not limited to the LED. For example, it may be a camera to which light from the outside of the housing is input through the opening, or a camera flash that outputs light to the outside of the housing through the opening.

The perspective view which shows the external appearance of the mobile telephone of embodiment of this invention. The disassembled perspective view of the mobile telephone of FIG. The disassembled perspective view of the key assembly of the mobile telephone of FIG. The top view and sectional drawing of the front case of the 2nd housing | casing of the mobile telephone of FIG. The perspective view of the sheet-metal part of the front case of FIG. The top view which shows arrangement | positioning of the resin part and sheet metal part of the front case of FIG. FIG. 5 is a partially enlarged view of FIG. 4. FIG. 3 is a diagram for explaining the arrangement positions of a circuit board and a battery of the mobile phone in FIG. 1. Sectional drawing of the IV-IV line of FIG. 1, and the partially expanded view of the sectional drawing. Sectional drawing of the XX line of Fig.4 (a). The block diagram which shows the structure of the signal processing system of the mobile telephone of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mobile phone (electronic device), 3 ... 1st housing | casing (other housing | casing), 5 ... 2nd housing | casing (housing | casing), 5a ... Opposite surface part (predetermined surface part), 29 ... Circuit board, 31 ... Battery (Electric parts), 39 ... Microphone (electroacoustic conversion part), 49 ... LED (light emitting element, electric light chilling part), 55 ... Resin part (first housing member), 55 h ... Sound collection opening (first opening) ), 56... Key opening (first opening, translucent opening), 57... Sheet metal part (second housing member), 57 h... Sound collection opening (second opening, translucent opening), 58. Opening (second opening).

Claims (8)

A housing,
An electronic circuit disposed in the housing;
Have
The housing is
A first housing member formed of a first material and having a first opening;
A second material is formed of a second material having a higher elastic coefficient than the first material, is embedded in the first housing member at least around the first opening, and a second opening is formed at a position overlapping the first opening. Two housing members;
Electronic equipment having The electronic apparatus according to claim 1, further comprising an electroacoustic conversion component having the first opening and the second opening as at least part of a sound path. An electro-optical conversion component having the first opening and the second opening as at least part of an optical path;
The electronic device according to claim 1, wherein the second material has a higher light shielding property than the first material. Having another casing connected to one end of the casing so as to be openable and closable with respect to the casing;
The electronic device according to claim 1, wherein the first opening and the second opening are formed on the one end side of the housing. In the housing, a circuit board disposed on the one end side,
In the casing, an electrical component disposed on the other end side of the casing with respect to the circuit board;
A microphone provided on the circuit board and facing the first opening and the second opening;
The electronic device according to claim 4 having A switch board disposed in the housing;
A switch mounted on the switch board;
A key top for pressing the switch;
Have
The first casing member is formed with a first key opening for exposing the key top,
6. The electronic device according to claim 1, wherein the second casing member is formed with a second key opening that exposes the key top at a position overlapping the first key opening. 7. machine. The first material has an insulating property,
The second material has conductivity,
The electronic device according to claim 1, wherein the second housing member is connected to a ground of the electric circuit. The first material is a resin;
The electronic device according to claim 1, wherein the second material is a metal.

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