JP2009043819A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device which enables a reduction in the number of components for positioning electronic components. <P>SOLUTION: A cellular phone 1 includes a main board 35, an FPC 55 connected to the main board 35, and a shield case 33. The shield case 33 has a contact portion 33d that is in contact with the edge of the main board 35 in a given direction along a mounting surface of the main board 35 to be able to position the main board 35, and a support portion 33e that is counter to the contact portion 33d across the main board 35 in the given direction. The FPC 55 has a fixed portion 55a fixed to the support portion 33e, and a board side bending portion 55c that is formed between a connection portion to the main board 35 and the fixed portion 55a to generate a restitutive force in the direction heading from the support portion 33e to the contact portion 33d. <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, a personal computer, and a game machine.

An electronic device such as a mobile phone is required to increase the number of electronic components to be mounted for high functionality. On the other hand, electronic devices are required to be downsized in order to improve portability. In order to satisfy such conflicting demands of increasing the number of electronic components mounted and downsizing of electronic devices, various electronic component positioning methods have been proposed. For example, in Patent Document 1, a circuit board and a liquid crystal panel connected to each other by a flexible printed wiring board (FPC) are stacked.
JP 2003-143030 A

  Electronic components such as circuit boards are often fixed (positioned) to a shield case or a case with screws. For this reason, various bad effects arise. For example, when a circuit board is fixed to a shield case or the like with screws, the number of parts increases by the amount necessary for the screws. In addition, since a region for forming a hole through which a screw is inserted into the circuit board is required, the mounting area of the circuit board is reduced, and it is difficult to reduce the size of the circuit board. As a result, it is difficult to reduce the size of the entire electronic device.

  The objective of this invention is providing the electronic device which can reduce the number of parts for positioning of an electronic component.

  An electronic apparatus according to a first aspect of the present invention includes a rigid board, a flexible board connected to the rigid board, and a positioning member for positioning the rigid board, and the positioning member is provided on the rigid board. A contact portion capable of positioning the rigid substrate by contacting an edge portion of the rigid substrate in a predetermined direction along the mounting surface; and a support portion facing the contact portion across the rigid substrate in the predetermined direction; The flexible substrate is provided between the fixed portion fixed to the support portion and the connecting portion of the rigid substrate and the fixed portion, and the direction from the support portion to the contact portion And a bending portion that generates a restoring force.

  Preferably, the support portion is a wall portion having a wall surface facing the abutting portion, and the flexible substrate wraps around the top portion of the wall portion from the opposite side of the wall portion to the rigid substrate. The wall portion extends to the rigid substrate side and is connected to the rigid substrate, and the fixing portion is a portion fixed to a wall surface of the wall portion opposite to the rigid substrate, and the bending portion As a portion, a bent portion formed on the rigid substrate side of the wall portion is provided so that the flexible substrate extends from the top of the wall portion toward the rigid substrate and then bends to the opposite side of the wall portion. It has been.

  Preferably, a portion of the flexible substrate that goes around the top of the wall portion further functions as the bent portion.

  Preferably, the positioning member has a conductive portion having conductivity, and a reference potential portion of the rigid substrate is electrically connected to the conductive portion.

  Preferably, the rigid substrate is provided with a plurality of electronic components on a mounting surface, and the positioning member is a shield case disposed to face the mounting surface.

  Preferably, the circuit board includes a circuit board fixed to the positioning member so as to be stacked on the rigid board and electrically connected to the rigid board via the flexible board.

  An electronic apparatus according to a second aspect of the present invention includes a first electronic component, a second electronic component, a flexible substrate that electrically connects the first electronic component and the second electronic component, A positioning member fixed to the second electronic component or the second electronic component is capable of positioning the first electronic component by contacting the first electronic component in a predetermined direction. A contact portion, and a support portion that faces the contact portion across the first electronic component in the predetermined direction, and the flexible substrate includes a connection portion to the first electronic component and the support portion. Between the support portion, there is a bending portion that generates a restoring force in the direction from the support portion to the contact portion and receives a reaction force that is a reaction force from the support portion.

  According to the present invention, the number of components for positioning electronic components can be reduced.

  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. 7) and a display unit 11 for displaying an image including graphic information, character information, and the like. The display unit 11 is configured by, for example, a liquid crystal display or an organic EL display.

  The second housing 5 is provided with, for example, a sound collection port 13 of a microphone 101 for calling (see FIG. 7), a front operation unit 15 and a side operation unit 17 that accept user operations. The front-side operation unit 15 is provided so as to be exposed from the facing surface portion 5 a facing the first housing 3 in the closed state of the second housing 5. The side operation part 17 is provided so as to be exposed from the side part 5b surrounding the outer periphery of the opposing surface part 5a.

  The front-side operation unit 15 is, for example, a plurality of dial keys 19A, a cursor key 19B, an enter key 19C, and a plurality of function keys 19D (hereinafter referred to as “front-side key top 19” without distinguishing between them). It may be said that). The side-side operation unit 17 includes, for example, a side-side key top 21 that is pressed.

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

  In the second housing 5, the front case 25, key assembly 27, key substrate 29, double-sided tape 31, shield case 33, main substrate 35, rear case 37, battery 39, Battery lids 41 are arranged in a stacked manner (strictly, partly in parallel). The main board 35 and the battery 39 are arranged in parallel in the stacking direction. An antenna 53 is provided at the end of the second housing 5 opposite to the connecting portion 7 (left side in FIG. 2).

  The second housing 5 includes a front case 25, a rear case 37, and a battery lid 41. These are made of, for example, an insulating resin. The facing surface portion 5 a of the second housing 5 is constituted by a front case 25. The side surface portion 5 b of the second housing 5 is constituted by a front case 25 and a rear case 37. A back surface portion of the second housing 5 opposite to the facing surface portion 5 a is constituted by a rear case 37 and a battery lid 41.

  For example, the front case 25 and the rear case 37 have outer contours that are substantially the same size and shape as viewed in the stacking direction. In the front case 25 and the rear case 37, for example, a plurality of screws (not shown) inserted in one (for example, the rear case 37) are screwed into a plurality of screw bosses 25a formed in the other (for example, the front case 25). Are fixed to each other. The key assembly 27, the key board 29, the shield case 33, and the main board 35 are sandwiched between the front case 25 and the rear case 37 by fixing the front case 25 and the rear case 37 to each other, and the second housing. It is fixed inside the body 5.

  The rear case 37 is formed with an opening 37 a for inserting a battery 39. The battery 39 is inserted into the second housing 5 through the opening 37a, and the battery lid 41 is engaged with the rear case 37 so as to close the opening 37a, so that the battery 39 is mounted in the second housing 5.

  The main board 35 is formed of a so-called rigid board that does not have flexibility. For example, the main board 35 is configured by a printed wiring board based on a hard resin. For example, the main board 35 is formed in a rectangular shape having a width approximately half that of the second housing 5. The main board 35 has a first mounting surface 35a on the front case 25 side and a second mounting surface 35b on the rear case 37 side.

  Various electronic components are arranged on the first mounting surface 35a and the second mounting surface 35b. For example, a plurality of ICs 43 are mounted on the first mounting surface 35a and the second mounting surface 35b. The IC 43 mounted on the first mounting surface 35a constitutes, for example, a high frequency circuit for enabling wireless communication using radio waves. Further, on the first mounting surface 35a and the second mounting surface 35b, a ground pattern layer 35c (only a part of which is shown) constituting a reference potential portion of the main substrate 35 (electronic circuit) is arranged in a predetermined pattern. .

  The shield case 33 is configured to have conductivity. For example, the shield case 33 is entirely made of metal. Further, for example, the shield case 33 is formed by applying a conductive paint to the surface of a base formed of resin.

  The shield case 33 is generally formed in a plate shape having a size capable of covering the main substrate 35. Specifically, the shield case 33 has a plate-like portion 33a facing the main substrate 35, and a rib 33b (see also FIG. 3) protruding from the plate-like portion 33a toward the main substrate 35 side. The plate-like portion 33a has, for example, a size close to that of the second housing 5 and has a size extending over the main substrate 35 and the battery 39. The ribs 33b extend substantially perpendicularly along the outer peripheral edge of the plate-like portion 33a to form the shield case 33 in a thin box shape, and also extend vertically and horizontally along the plate-like portion 33a inside the box body. The inside of the box is partitioned into a plurality of regions. The rib 33b contacts the ground pattern layer 35c provided on the first mounting surface 35a, supports the main substrate 35, and electrically connects the shield case 33 and the ground pattern layer 35c.

  The double-sided tape 31 is configured, for example, by applying an adhesive to both sides of a flexible sheet made of resin, rubber, or the like. The double-sided tape 31 has, for example, the same width as the plate-like portion 33a of the shield case 33, and bonds the shield case 33 and the key substrate 29 together. Instead of the double-sided tape 31, the key substrate 29 and the plate-like portion 33a may be bonded by an adhesive, or the key substrate 29 and the plate-like portion 33a may be bonded by sheet welding.

  The key substrate 29 is constituted by, for example, a so-called rigid substrate. For example, the key substrate 29 is configured by a printed wiring board based on a hard resin. The key substrate 29 is formed thinner than the main substrate 35, for example. Note that the key substrate 29 may be formed of a so-called flexible substrate having flexibility. The key board 29 has, for example, the same area as the shield case 33. The key board 29 is constituted by a so-called double-sided mounting circuit board, and has a third mounting surface 29a on the front case 25 side and a fourth mounting surface 29b on the rear case 37 side. The key board 29 may be configured by a single-sided circuit board.

  Various electronic components are mounted on the third mounting surface 29a. For example, a plurality of switches 45 constituting the front operation unit 15 and a plurality of light emitting elements 47 that illuminate the front key top 19 are mounted. The plurality of switches 45 and the plurality of light emitting elements 47 are arranged over substantially the entire third mounting surface 29a. The plurality of switches 45 are constituted by so-called dome switches, for example, and when the dome-shaped movable contact is pressed, the movable contact and the fixed contact come into contact with each other and are turned on. Only the key side connector 63 (FIG. 6A) described later is provided on the fourth mounting surface 29b. Double-sided tape 31 is adhered to most of the fourth mounting surface 29b.

  The key assembly 27 includes a key sheet 49, and a front side key top 19 and a side key top 21 that are fixed to the key sheet 49 with an adhesive or the like.

  The key sheet 49 is formed of, for example, translucent silicon rubber. The key sheet 49 is formed to be approximately the same size as the key substrate 29 and can cover the plurality of switches 45 and the plurality of light emitting elements 47. Although not particularly illustrated, the key sheet 49 includes a rib that protrudes and contacts the key substrate 29 between the plurality of switches 45, a pusher that protrudes toward the key substrate 29 so that the plurality of switches 45 can be pressed. . The front key top 19 is provided at a position corresponding to the plurality of switches 45.

  The key sheet 49 has an extending portion 49 b that extends from the edge of the main body portion that covers the key substrate 29. The extending portion 49b is bent toward the key substrate 29 with respect to the main body portion. The side key top 21 is fixed to the key sheet 49.

  For example, the battery 39 is formed in a thin rectangular parallelepiped shape that is approximately half as wide as the second housing 5. The battery 39 is connected to, for example, a case made of resin or the like, a battery cell provided in the case, in which a positive electrode and a negative electrode are stacked with a separator interposed therebetween, and a positive electrode and a negative electrode of the battery cell, although not particularly illustrated. And a circuit board provided with a power feeding terminal, a protection circuit, and the like. A power feeding terminal of the battery 39 is electrically connected to a power receiving terminal 51 provided at an edge of the main board 35.

  The antenna 53 includes, for example, a base made of resin, and a conductive layer (antenna element) formed in a predetermined pattern on the surface of the base, although not particularly shown. The base of the antenna 53 is fixed by being sandwiched between the front case 25 and the rear case 37. The conductive layer of the antenna 53 is electrically connected to an antenna terminal 54 provided on the key substrate 29.

  In the mobile phone 1 having the above configuration, the main substrate 35 and the key substrate 29 are electrically connected by an FPC (flexible printed circuit board) 55. The FPC 55 contributes to the positioning of the main board 35 with respect to the shield case 33. Further, the FPC 55 is provided with a switch 57 constituting the side operation unit 17. Hereinafter, the positioning of the main board 35 by the FPC 55 will be described in detail.

  3 is an exploded view of the main board 35, the shield case 33 and the key board 29 (hereinafter, the shield case 33 and the key board 29 fixed to each other may be referred to as “plate-like component 59”), and the FPC 55. It is a perspective view shown in a state. 4 and 5 are perspective views showing the main board 35, the plate-like component 59, and the FPC 55 fixed to each other. FIG. 6A is a cross-sectional view taken along line VIa-VIa in FIG. FIG. 6B is a cross-sectional view showing the FPC 55 extracted from FIG. 3 to 5 are all perspective views seen from the rear case 37 side, and the vertical direction of the drawing is opposite to that of FIG.

  The FPC 55 is constituted by, for example, a so-called single-sided FPC. Although not particularly illustrated, the FPC 55 is formed on a base film made of an insulator, an adhesive layer formed on the base film, and the adhesive layer. A conductive layer, an adhesive layer formed on the conductive layer, and a cover film formed on the adhesive layer. The structure of the FPC 55 is not limited to the above structure, and may be an appropriate structure. The FPC 55 may be configured by a so-called double-sided FPC.

  For example, the FPC 55 is electrically connected to the main board 35 by a main connector 61 provided on the second mounting surface 35 b of the main board 35, and a key side connector 63 provided on the fourth mounting surface 29 b of the key board 29. (FIG. 6A) is electrically connected to the key board 29.

  The main side connector 61 and the key side connector 63 are constituted by, for example, a connector having a lock mechanism, and the lock mechanism is locked in a state where the end portion of the FPC 55 is inserted. Therefore, the main connector 61 and the key connector 63 press the contact of the connector against the contact of the end of the FPC 55 to electrically connect the FPC 55 and the circuit board, and the end of the FPC 55 to the circuit board. Fix it. The main-side connector 61 and the key-side connector 63 are, for example, arranged at substantially the same position in the direction along the left edge of the shield case 33 in FIGS. 3 to 6, and the end portion of the FPC 55 is inserted. The slot is arranged with the edge side facing. The FPC 55 is wound around the support portion 33e of the shield case 33, so that the main board 35 provided on one surface side of the shield case 33 to the key board 29 provided on the other surface side of the shield case 33. It extends.

  The shield case 33 has an abutting portion 33d for positioning the main substrate 35 at an end portion on the right side of the paper surface of FIG. 3 to FIG. 5 (an edge portion on the opposite side to the edge portion around which the FPC 55 is wound). Yes. The contact portion 33d is formed to protrude from the rib 33b of the shield case 33, for example, and is formed in a wall shape having a wall surface facing the FPC 55 side. The contact portion 33d is a direction along the first mounting surface 35a of the main substrate 35 by bringing the wall surface into contact with the edge portion of the main substrate 35 and a direction orthogonal to the edge portion of the main substrate 35 (predetermined). The main board 35 can be positioned in one example of direction). Note that the edge portion of the main board 35 is cut out so that the contact portion 33 d is fitted, and the contact portion 33 d also contributes to positioning in the direction along the edge portion of the main substrate 35. In this embodiment, the case where two contact portions 33d are provided (FIGS. 3 and 4) is illustrated, but the number of contact portions 33d may be set as appropriate, and even one contact portion 33d may be set. Three or more may be sufficient.

  Further, the shield case 33 has a support portion 33e for supporting the FPC 55 at an end portion (an edge portion around which the FPC 55 is wound) on the left side in FIG. 3 to FIG. The support portion 33e is formed in a wall shape having a wall surface facing the contact portion 33d with the main substrate 35 interposed therebetween. The support part 33e protrudes from the main board 35 to the rear case 37 side (upward side of the drawing in FIGS. 3 to 6). For example, the length of the support portion 33e along the side surface of the shield case 33 is set to be equal to or longer than the width of the FPC 55 (the length in the direction perpendicular to the main connector 61 from the main connector 61). Further, the support portion 33e is disposed at substantially the same position as the main side connector 61 and the key side connector 63 in the direction along the left end of the shield case 33 in FIGS.

  The FPC 55 is connected to the main substrate 35 by extending from the opposite side of the support portion 33e to the main substrate 35 and extending to the main substrate 35 side of the support portion 33e. Note that a protrusion for positioning the FPC 55 in the width direction (the direction along the edge of the shield case 33) is formed on the support portion 33e, and the outer wall surface 33f (reference numeral is opposite to the main board 35) of the support portion 33e. 3 and FIG. 6) and an inner wall surface 33g (see FIG. 3 and FIG. 6 for reference numerals) of the support portion 33e on the main board 35 side.

  As shown in FIGS. 5 and 6, a portion (fixed portion 55 a) of the FPC 55 that faces the outer wall surface 33 f on the side opposite to the main substrate 35 of the support portion 33 e is fixed to the outer wall surface 33 f. The fixing is performed by an appropriate adhesive member such as a double-sided tape or an adhesive.

  The FPC 55 wraps around the top portion of the support portion 33e from the outer wall surface 33f side, then extends from the top portion toward the main substrate 35 so as to be substantially along the wall surface of the support portion 33e, and then to the opposite side of the support portion 33e. It bends and extends substantially along the second mounting surface 35b of the main board 35. The top side bent portion 55b at the top of the support portion 33e and the substrate side bent portion 55c on the main substrate 35 side of the support portion 33e that realize such an arrangement (shape) of the FPC 55 have lower bending rigidity than other portions. It is comprised so that it may become. For example, in the FPC 55, the cover film and / or the base film is thinly formed at the top side bent portion 55b and the substrate side bent portion 55c.

  A switch 57 is mounted on the fixing portion 55 a of the FPC 55. The switch 57 is constituted by, for example, a dome switch similar to the switch 45, and can be pressed by the side key top 21 (FIGS. 1 and 2) via the extending portion 49b (FIG. 2) of the key sheet 49. It is. The support portion 33e supports the switch 57 when the switch 57 is pressed. The switch 57 may output a signal to the main board 35, or may output a signal to the key board 29.

  A method of assembling the main board 35, the plate-like component 59, and the FPC 55 having the above configuration will be described.

  Before the main board 35, the plate-like component 59, and the FPC 55 are fixed and assembled, the top side bent portion 55b and the board side bent portion 55c of the FPC 55 are bent to some extent in order to improve the ease of assembly (permanently). Deformation) is attached, but it is not bent when compared after being assembled.

  Then, one end of the FPC 55 is connected to the main board 35 via the main side connector 61, the other end of the FPC 55 is connected to the key board 29 via the key side connector 63, and the fixing portion 55 a of the FPC 55 is supported by the shield case 33. The main board 35 is disposed between the support part 33e of the shield case 33 and the contact part 33d. At this time, the top-side bent portion 55b and the substrate-side bent portion 55c of the FPC 55 have the fixing portion 55a fixed to the support portion 33e and the end portion of the FPC 55 fixed to the main-side connector 61. It receives a compressive load from 33e and the main board 35, and bends to the state shown in FIGS. 4 to 6 with elastic deformation or elastic-plastic deformation.

  As a result, as shown in FIG. 6B, a restoring force F1 in a direction in which bending is to be reduced is generated in the substrate side bent portion 55c. The restoring force F1 is divided into a component force F2 along the main substrate 35 in the FPC 55 and a component force F3 along the support portion 33e in the FPC 55. The component force F2 biases the main substrate 35 against the shield case 33 from the support portion 33e toward the contact portion 33d. Thus, the main board 35 comes into contact with the contact portion 33d with a predetermined pressure, and is positioned with respect to the shield case 33 in the direction along the mounting surface. Further, the frictional force generated by the pressure between the main board 35 and the contact portion 33d suppresses the main board 35 from being separated from the shield case 33 in the stacking direction. The component force F3 biases the main board 35 in the direction of approaching the shield case 33 in the stacking direction.

  Similarly, in the top side bent part 55b, a restoring force F5 is generated in a direction in which bending is to be reduced. Similar to the component force F2 of the restoring force F1, the restoring force F5 biases the main substrate 35 toward the shield case 33 in the direction from the support portion 33e to the contact portion 33d.

  In this way, the main board 35 and the plate-like component 59 are fixed and connected. The step of connecting the FPC 55 and the main side connector 61, the step of connecting the FPC 55 and the key side connector 63, the step of fixing the fixing portion 55a of the FPC 55 and the support portion 33e of the shield case 33, and the main board 35 are shielded. The process etc. arrange | positioned between the support part 33e and the contact part 33d of case 33 may be performed in an appropriate order.

  Note that the component between the FPC 55 and the board-side bent portion 55c and the main-side connector 61 is more parallel to the main board 35, and the component F2 is preferably larger in the component parallel to the main board 35. Similarly, as the portion between the substrate-side bent portion 55c and the top-side bent portion 55b of the FPC 55 is orthogonal to the main substrate 35, the component F3 is preferably increased in the component orthogonal to the main substrate 35. That is, it is preferable that the board | substrate side bending part 55c is near a right angle.

  The main board 35 and the plate-like component 59 fixed to each other by the FPC 55 are sandwiched between the front case 25 and the rear case 37 as described above, and are fixed in the second housing 5. Is done. At this time, the main board 35 and the shield case 33 are positioned in a direction perpendicular to the stacking direction by abutment with a predetermined pressure in the stacking direction and / or by a positioning portion inside the second housing 5. Thus, they can be fixed to each other in a direction perpendicular to the stacking direction.

  Therefore, after the front case 25 and the rear case 37 are fixed, the main board 35 may not be urged by the restoring force of the FPC 55 or may be urged. In other words, the fixing of the main board 35 and the shield case 33 by the restoring force of the FPC 55 may be temporary fixing until the front case 25 and the rear case 37 are fixed, or the front case 25 and the rear case 37. It may be final fixing that is continued until after fixing.

  When the main board 35 and the shield case 33 are temporarily fixed by the restoring force of the FPC 55, for example, as shown in FIG. 6, the protrusion 37b protruding from the inner surface of the rear case 37 has a board of the FPC 55. A portion between the side bent portion 55c and the main side connector 61 is pressed against the main substrate 35, and a restoring force in the direction from the support portion 33e to the contact portion 33d is generated on the main substrate 35. You may make it not.

  FIG. 7 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 43 provided on the main board 35, for example.

  The CPU 85 and the memory 86 function as a control unit that performs predetermined calculations based on signals from various means such as the front-side operation unit 15 and the side-side operation unit 17 and controls various units such as the image processing unit 93. To do.

  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 53 in order to perform long-distance wireless communication using radio waves. In addition, the communication processing unit 87 demodulates a signal received via the antenna 53 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 calling speaker 97 and the notification speaker 99 for notifying incoming calls. The call speaker 97 and the notification speaker 99 convert the electrical signal from the sound processing unit 91 into sound and output the sound. On the other hand, the microphone 101 converts the input sound into an electric signal and outputs it to the sound processing unit 91. The sound processing unit 91 converts an electrical signal from the microphone 101 into sound data and outputs the sound data 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 a predetermined camera module 95 (see also FIGS. 4 and 5) is converted into image data of a predetermined format and output to the CPU 85.

  According to the above embodiment, the mobile phone 1 includes the main board 35, the FPC 55 connected to the main board 35, and the shield case 33 that positions the main board 35, and the shield case 33 is the main board 35. The support portion 33e and the contact portion 33d are sandwiched between the main substrate 35 in the direction along the mounting surface, and the FPC 55 has a fixing portion 55a fixed to the support portion 33e. A bent portion (a top side bent portion 55b or a board side bent portion 55c) that generates a restoring force in the direction from the support portion 33e to the contact portion 33d between a portion inserted into the main side connector 61 and the fixing portion 55a. Therefore, in temporary fixing, or in temporary fixing and final fixing, the main board 35 is brought into contact with the contact portion 33 of the shield case 33 by the restoring force of the FPC 55. Can be positioned and fixed with respect to the shield case 33 of the main substrate 35 is pressed against by conventional screws as compared with the case of fixing the main board 35 and the shield case 33, it is possible to reduce the number of parts.

  The shield case is provided with a plurality of positioning portions facing each other with the rigid substrate interposed therebetween, and the rigid substrate is press-fitted between the plurality of positioning portions, thereby fixing the rigid substrate to the shield case while reducing the number of components. A method is conceivable. However, in this case, there is a possibility that the press-fitting cannot be appropriately performed due to tolerance. Further, in order to properly press-fit, it is necessary to confirm the finished dimensions of the shield case, adjust the outer shape of the rigid board according to the dimensions, and determine the dimensions of the rigid board. Furthermore, such an adjustment must be made in consideration of all combinations of a plurality of rigid boards that are multi-sided from one board and a plurality of shield cases that are taken from one mold. . Therefore, the adjustment time until the start of production becomes long, and the labor and cost for adjustment increase. Also, the pressure for press-fitting must be managed, and even if managed, the press-fitting position may vary due to the tolerance of the stacked components. In the present embodiment, such inconvenience can be eliminated or suppressed.

  The support part 33e is a wall part having a wall surface facing the contact part 33d, and the FPC 55 wraps around the top part of the support part 33e from the side opposite to the main board 35 of the support part 33e and the main board of the support part 33e. The fixing portion 55a is a portion fixed to the outer wall surface 33f on the side opposite to the main substrate 35 of the support portion 33e. The FPC 55 includes the FPC 55. A substrate-side bent portion 55c formed on the main substrate 35 side of the support portion 33e is provided so as to extend from the top of the support portion 33e toward the main substrate 35 and then bend to the opposite side of the support portion 33e. As shown in FIG. 6B, the FPC 55 can be positioned by urging the main board 35 in the direction along the mounting surface by the restoring force F1 of the board side bent portion 55c. Rutotomoni can also be positioned in the stacking direction to urge the direction of stacking the main board 35 to the shield case 33.

  Since the portion (the top side bent portion 55b) of the FPC 55 that goes around the top of the support portion 33e further functions as a bent portion that urges the main substrate, the main substrate 35 can be positioned more reliably.

  The positioning member (shield case 33) for positioning the main board 35 has a conductive part having conductivity (when the shield case 33 is made of metal, the entire shield case 33, and the shield case 33 is electrically connected to the surface of the insulator. Since the ground pattern layer 35c of the main board 35 is electrically connected to the conductive portion of the shield case 33, the main board 35 is positioned. The member is not a simple positioning member but is used as a ground and contributes to stabilizing the electrical operation of the main board 35.

  In particular, as in the present embodiment, when the positioning member is a shield case arranged to face the first mounting surface 35a of the main board 35, the shield case is effectively used for positioning the main board 35. The number of parts is preferably reduced.

  Since the mobile phone 1 includes the key substrate 29 that is fixed to the shield case 33 so as to be stacked on the main substrate 35 and electrically connected to the main substrate 35 via the FPC 55, the FPC 55 The electronic components to be connected are positioned with each other by the restoring force of the FPC 55. Therefore, a thin structure with a simple and small number of parts is realized. When the support portion 33e, the top side bent portion 55b, the substrate side bent portion 55c, and the like are not provided, the restoring force of the FPC 55 wound around the edge of the shield case 33 is as follows. Acts to be spaced apart in the stacking direction.

  In the present embodiment, the mobile phone 1 is an example of the electronic device of the present invention, the main substrate 35 is an example of the rigid substrate of the present invention, the FPC 55 is an example of the flexible substrate of the present invention, and the shield case 33 Alternatively, the plate-like component 59 is an example of the positioning member of the present invention, the ground pattern layer 35c is an example of the reference potential portion of the present invention, the main board 35 is an example of the first electronic component of the present invention, and the key The substrate 29 is an example of a second electronic component of the present invention.

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

  The electronic device is not limited to a mobile phone. For example, a PDA, a notebook computer, a digital camera, or a game machine may be used. The electronic device is not limited to a portable terminal, and may be a built-in electronic device such as a printer.

  The first electronic component and the second electronic component are not limited to circuit boards. For example, a camera module or a display device may be used. The circuit board (the key board 29 in the embodiment) fixed to the positioning member is not limited to the rigid board, and may be a flexible board.

  The positioning member is not limited to the shield case, and may be a member constituting a part of an electronic component such as a casing of an electronic component (for example, a display device) or a casing of an electronic device. Good. Further, the positioning member is not limited to the one integrally formed as a whole, and two or more members may be fixed to each other. It may or may not have conductivity.

  The support part and the contact part provided in the positioning member are not limited to the wall-like ones. The support portion may be any shape that can apply a reaction force to the flexible substrate to be restored by the restoring force. Similarly, the contact portion applies a reaction force to the rigid substrate biased by the flexible substrate. If possible. Therefore, for example, the support part and the contact part may be columnar.

  The bending part of a flexible substrate should just be provided at least one, and is not limited to two. One may be sufficient and three or more may be provided. Moreover, the position and the bending direction may be set as appropriate. For example, in the embodiment, a plurality of bent portions may be formed by alternately bending a plurality of times so that a portion between the board side bent portion 55c and the main side connector 61 of the FPC 55 becomes jagged. Instead of the substrate-side bent portion 55c, a bent portion whose convex direction is opposite to that of the substrate-side bent portion 55c may be provided. In addition, for example, in the embodiment, the top side bent portion 55b may not function as a bent portion that generates a restoring force by adding a habit to the shape after assembly before assembling.

  The flexible substrate and the support portion may be fixed as in the embodiment or may not be fixed. For example, if the flexible substrate is in contact with the opposing surface facing the contact portion of the support portion, the flexible substrate receives a reaction force from the opposing surface without bonding the opposing surface and the flexible substrate, The rigid substrate can be biased toward the contact portion.

  The fixing method of the flexible substrate and the support portion is not limited to adhesion. For example, you may fix with a screw | thread or an engaging part. However, when a switch such as a press switch supported by the support portion is provided on the flexible substrate as in the embodiment, the operation feeling of the switch is more preferable when the flexible substrate and the outer wall surface 33f are bonded. Easy to keep in.

  Fixing of the positioning member (shield case 33 in the embodiment) and the second electronic component (key board 29 in the embodiment) is not limited to adhesion, and may be performed by a screw or an engaging portion. However, when the second electronic component is a circuit board as in the embodiment, particularly when the second electronic component is a circuit board provided with a user interface such as a switch, the second electronic component can be firmly fixed with a wide bonding area when fixed by bonding. In addition, there is an effect that a large mounting area can be secured.

  When the reference potential portion and the conductive portion are electrically connected, the connection may be made via a flexible substrate, or the contact portion and the rigid substrate that are urged and contacted by the flexible substrate. May be performed between the edges. Or the said electrical connection may be performed by contact of the contact part and the edge part of a rigid board | substrate through a flexible substrate. In this case, since the ground of the rigid board can be connected to the shield case via two routes, the electronic device can obtain a more stable ground.

The perspective view which shows the external appearance of the mobile telephone of embodiment of this invention. The disassembled perspective view of the 2nd housing | casing of the mobile telephone of FIG. The disassembled perspective view which shows a part of inside of the 2nd housing | casing of FIG. The perspective view which shows a part of inside of the 2nd housing | casing of FIG. The perspective view of the viewpoint different from FIG. Sectional drawing of the IVa-IVa line | wire of FIG. 4 and sectional drawing which extracts and shows the part. 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 telephone (electronic device), 35 ... Main board (rigid board), 55 ... FPC (flexible board), 33 ... Shield case (positioning member), 33e ... Support part, 33d ... Contact part, 55a ... Fixed part 55b... Top side bent portion (bend portion), 55c... Substrate side bend portion (bend portion).

Claims (7)

A rigid board;
A flexible substrate connected to the rigid substrate;
A positioning member for positioning the rigid substrate;
Have
The positioning member is
A contact portion capable of positioning the rigid substrate by contacting the edge of the rigid substrate in a predetermined direction along the mounting surface of the rigid substrate;
A support portion facing the contact portion across the rigid substrate in the predetermined direction;
Have
The flexible substrate is
A fixing part fixed to the support part;
A bending portion that is provided between the connecting portion with the rigid substrate and the fixing portion, and generates a restoring force in a direction from the support portion to the contact portion;
Electronic equipment having The support portion is a wall portion having a wall surface facing the contact portion,
The flexible substrate is connected to the rigid substrate by extending around the top of the wall portion from the opposite side of the wall portion to the rigid substrate and extending toward the rigid substrate side of the wall portion,
The fixing portion is a portion fixed to a wall surface of the wall portion opposite to the rigid substrate,
As the bending portion, the bending portion formed on the rigid substrate side of the wall portion so that the flexible substrate extends from the top portion of the wall portion toward the rigid substrate and then bends to the opposite side of the wall portion. The electronic device according to claim 1. The electronic device according to claim 2, wherein a portion of the flexible substrate that goes around the top of the wall portion further functions as the bending portion. The positioning member has a conductive part having conductivity,
The electronic device according to claim 1, wherein a reference potential portion of the rigid substrate is electrically connected to the conductive portion. The rigid board is provided with a plurality of electronic components on the mounting surface,
The electronic device according to claim 4, wherein the positioning member is a shield case disposed to face the mounting surface. 6. The circuit board according to claim 1, further comprising a circuit board fixed to the positioning member so as to be stacked on the rigid board and electrically connected to the rigid board via the flexible board. The electronic device as described in the paragraph. A first electronic component;
A second electronic component;
A flexible substrate for electrically connecting the first electronic component and the second electronic component;
Have
The positioning member fixed to the second electronic component or the second electronic component is:
An abutting portion capable of positioning the first electronic component by contacting the first electronic component in a predetermined direction;
A support portion facing the contact portion across the first electronic component in the predetermined direction;
Have
The flexible substrate generates a restoring force in a direction from the support portion to the contact portion between the connection portion with the first electronic component and the support portion, and is a reaction force from the support portion. An electronic device that has a bending part that receives a reaction force.

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