JP2009171175A - Portable electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable electronic apparatus in which stripping of electronic components which are mounted around a contact part of a circuit board from the circuit board is suppressed. <P>SOLUTION: In a shield case 22 arranged by being piled on the circuit board 23 arranged inside a casing, a mounting microphone 231 is mounted on the circuit board 23, in a protruded area R of the shield case 22, and a notch 23a is provided on a part of the circuit board 23 around the mounting microphone 231. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a portable electronic device such as a mobile phone, a digital camera, and a PDA (Personal Digital Assistant).

  In general, portable electronic devices such as a mobile phone, a digital camera, and a PDA (Personal Digital Assistant) have a key operation unit side casing (first casing), a panel side casing (second casing), and a first casing side casing. The circuit board is disposed on the circuit board, and a voice conversion component mounted on the circuit board, that is, a microphone, an antenna, and the like, and is required to be reduced in size and thickness (see Patent Document 1).

  FIG. 7 is a perspective view showing an appearance of a general folding mobile phone as an example of the mobile electronic device.

  As shown in FIG. 7, the mobile phone includes a first housing 1 and a second housing 2 that are connected so as to be openable and closable. FIG. 7 shows a closed state in which the first housing and the second housing overlap.

  The second housing 2 is configured with a speaker, a display, and the like.

  FIG. 8 is an exploded perspective view of the first housing 1 of FIG.

  As shown in FIG. 8, the first housing 1 (housing) includes a front case 11, a shield case 12, a circuit board (main board) 13, a main antenna 14, a camera module 15, a battery 17, and a battery lid 18.

  The front case 11 is provided with a plurality of dial keys 111, a cursor key 112, a determination key 113, a plurality of function keys 114, and the like as a front side operation unit to be pressed.

The shield case 12 is formed of a metal die-cast member and is electrically connected to the ground line of the circuit board 13.
The shield case 12 has almost the same area as the circuit board 13.

The circuit board 13 is constituted by a so-called rigid board with little flexibility, for example, a printed wiring board based on hard resin.
Electronic components such as a mounting microphone (hereinafter simply referred to as a microphone) 131 are mounted on the circuit board 13 in addition to a high-frequency circuit and the like.
Note that the mounting microphone 131 is more advantageous in terms of manufacturing cost and assembly man-hour than the contact microphone. An antenna tab 132 is provided at an end of the circuit board 13 for electrical connection with the main antenna 14.

The rear case 16 has substantially the same size and shape as the front case 11.
The front case 11 and the rear case 16 are fixed to each other by screwing a plurality of screws (not shown) inserted into one into screw bosses (not shown) formed on the other.

  The circuit board 13 is brought into direct contact with the front case 11 and the rear case 16 by the front case 11 and the rear case 16 being fixed to each other, or indirectly through an internal structure such as the main antenna 14. By being provided with a contact portion that is in contact with the first housing 1, the first housing 1 is fixed. Several electronic components are also mounted around the contact portion of the circuit board 13.

  The rear case 16 is provided with a side key top 161 as a side operation part to be pressed.

The rear case 16 is formed with an opening 162 for inserting the battery 17.
The battery 17 is inserted into the housing through the opening 162, and the rear case 16 is engaged so that the battery lid 18 closes the opening 162, whereby the battery 17 is mounted in the housing.

JP 2007-60481 A

  However, in the above-described conventional mobile phone, since the electronic component is simply mounted on the circuit board 13, if the load is applied to the contact portion of the circuit board due to a load from the outside of the housing, the contact is made. There is a problem that an electronic component mounted around the part may be peeled off from the circuit board.

  An object of the present invention is to provide a portable electronic device that suppresses peeling of an electronic component mounted around a contact portion of a circuit board due to a load from the circuit board.

  A portable electronic device according to the present invention includes a housing, a circuit board that is disposed in the housing, and has a contact portion that directly or indirectly contacts the housing, and the circuit board. And an electronic component mounted around the contact portion, and a notch is formed in at least a part of the circuit board around the electronic component.

  Preferably, the electronic component is mounted on an end portion of the circuit board.

  Preferably, the antenna has an antenna in contact with a portion corresponding to a portion where the electronic component is mounted on a surface opposite to the surface where the electronic component is mounted of the circuit board.

  Preferably, the electronic component is a voice conversion component, and an elastic member is provided between the voice conversion component and the housing.

  Preferably, the sound conversion component is a microphone.

  ADVANTAGE OF THE INVENTION According to this invention, peeling from the circuit board of the electronic component mounted in the circumference | surroundings of the contact part of a circuit board can be suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1A is a front view showing the appearance of a mobile phone 1 as an example of the mobile electronic device of the present invention in an open state. FIG. 1B is a side view showing the appearance of the mobile phone 1 in an open state.

The mobile phone 10 is configured as a mobile phone having a so-called biaxial hinge.
Specifically, the mobile phone 10 includes a first housing 20, a second housing 30, and a connection housing 40.
The connection housing 40 is connected to the first housing 20 to be rotatable about the first rotation axis AX, and is connected to the second housing 30 to be rotatable about the second rotation axis BX.
In addition, the 1st housing | casing 20 comprises the housing | casing of this invention.

For example, the first housing 20 and the second housing 30 are formed in a generally thin rectangular parallelepiped shape, and are connected at one end in the longitudinal direction.
The first housing 20 and the second housing 30 are formed so that their contours substantially coincide with each other in the closed state.
As shown in FIG. 1B, the first housing 20 includes a first region 20a on the side opposite to the connection housing 40, and a second thicker than the first region 20a on the connection housing 40 side. It has the area | region part 20b and the boundary part 20c of the 1st area | region part 20a and the 2nd area | region part 20b.

  For example, as shown in FIG. 1A, the first housing 20 has a sound collecting hole 201 of a microphone for calling on the surface facing the second housing 30 in the closed state, and an operation for receiving a user operation. A unit 202 is provided.

  For example, as shown in FIG. 1A, the second housing 30 is provided with a sound emitting hole 301 of a speaker for calling and a main display unit 302 that displays an image including graphics and characters. For example, a sub display unit (not shown) is provided on the back surface of the second housing 30.

  FIG. 2 is an exploded perspective view of the first housing 1 of FIG.

  As shown in FIG. 2, the first housing 20 includes a front case 21, a shield case 22, a circuit board (main board) 23, a main antenna 24, a camera module 25, a rear case 26, a battery 27 and a battery lid 28.

  The front case 21 is provided with a plurality of dial keys 211, a cursor key 212, a determination key 213, a plurality of function keys 214, and the like as a front side operation unit 202 to be pressed.

The shield case 22 is formed of a metal die-cast member and is electrically connected to the ground line of the circuit board 23.
The shield case 22 has almost the same area as the circuit board 23.

The circuit board 23 is constituted by a so-called rigid board with little flexibility, for example, a printed wiring board based on hard resin.
A mounting microphone (mounting microphone) 231 is mounted on the circuit board 23 in addition to a high-frequency circuit or the like.
In the present embodiment, in the circuit board 23, a cut 23 a is formed on a part of the periphery of the mounting microphone 231, for example, outside.
This incision will be described in detail later.

  The mounting microphone 231 is more advantageous in terms of manufacturing cost and assembly man-hour than the contact microphone. An antenna tab 232 is provided at the end of the circuit board 23 for electrical connection with the main antenna 24.

The rear case 26 has substantially the same size and shape as the front case 21.
The front case 21 and the rear case 26 are fixed to each other by screwing a plurality of screws (not shown) inserted into one into screw bosses (not shown) formed on the other.

  The shield case 22 and the circuit board 23 are sandwiched between the front case 21 and the rear case 26 and fixed in the first housing 1 by fixing the front case 21 and the rear case 26 to each other.

  The rear case 26 is provided with a side key top 261 as a side operation part to be pressed.

The rear case 26 is formed with an opening 262 for inserting the battery 27.
The battery 27 is inserted into the housing through the opening 262, and the rear case 26 is engaged so that the battery lid 28 closes the opening 262, whereby the battery 27 is mounted in the housing.

  Hereinafter, in the circuit board 23, a notch 23a formed on a part of the periphery of the mounting microphone 231, for example, the outside will be described.

<First Embodiment>
3A and 3B show details of the first housing according to the first embodiment of the present invention, in which FIG. 3A is a plan view, FIG. 3B is a cross-sectional view along line BB ′ in FIG. It is CC 'sectional view taken on the line of A).
FIG. 4 is a plan view for explaining an overhang region R which is an end portion of the circuit board 23 of FIG. 3 and is a region not facing the shield case.

  As shown in FIG. 3, the circuit board 23 is fixed to the shield case 22 with screws (not shown) in order to protect the circuit board 23 from falling and static pressure loads.

In this case, when the mounting microphone 231 is covered with the shield case 22, the sound collecting effect is lowered, and therefore the mounting microphone 231 is mounted in the protruding region R, that is, is not surrounded by the shield case 22.
Further, in order to ensure the sound pressure of the mounting microphone 231, a rubber microphone sponge 231 a is provided between the mounting microphone 231 and the front case 21.

  The protruding region R of the circuit board 23 is directly pressed from the upper side in the figure by the rib of the front case 21 and is suppressed from the lower side in the figure by the rear case 26, and further, the main antenna 24. In this way, the rear case 26 is indirectly brought into contact with the rear case 26 and restrained from the lower side in the figure, thereby being sandwiched in the z direction. In addition, the part contact | abutted by the front case 21, the rear case 26, and the main antenna 24 of the circuit board 23 comprises the contact part of this invention.

In the present embodiment, on the circuit board 23, the mounting microphone 231 is mounted around the contact portion, and a notch 23a is formed in a part of the periphery, for example, outside.
Due to the cuts 23 a, the deformation to the circuit board 23 caused by the load from the surroundings blocks the propagation to the mounting microphone 231. In this case, the mounting microphone 231 is restrained from being suppressed from the lower side in the z direction by the rear case 26 and the main antenna 24, and the mounting microphone 231 vibrates. However, since this vibration is attenuated by the microphone sponge 231a, the influence is small.

  Note that the formation of the cuts 23a in the conventional circuit board 23 does not increase the manufacturing cost or the number of manufacturing steps.

3 and 4, when the distance between the main antenna 24 and the metal shield case 22 is increased in order to ensure the characteristics of the main antenna 24, the protruding region R from the shield case 22 is expanded in the y direction. Will do.
Also in this case, if the mobile phone is accidentally dropped, the circuit board 23 may be pushed down by the ribs of the front case 21.
As a result, as shown in FIG. 3B, the circuit board 23 ′ in the large protrusion region R in the cross section taken along the line BB ′ formed around the contact portion is greatly subjected to the sag due to the drop impact. Since the mounting microphone 231 does not exist in this portion, the mounting microphone 231 is not affected.

On the other hand, as shown in FIG. 3C, the circuit board 23 in the small protruding region R in the CC ′ line cross section is difficult to transmit vibration to the mounting microphone 231 because of the presence of the cut 23a. The mounting microphone 231 is not dropped off.
Thus, securing the characteristics of the main antenna 24 and preventing the mounting microphone 231 from falling off are compatible.

Second Embodiment
5A and 5B show details of the first housing according to the second embodiment of the present invention, in which FIG. 5A is a plan view, FIG. 5B is a sectional view taken along line BB ′ in FIG. It is CC 'sectional view taken on the line of (A).
FIG. 6 is a plan view for explaining a protruding region of the shield case of FIG.

The second embodiment and the first embodiment differ in the form of the circuit board cut.
That is, as shown in FIG. 6, a notch 23 b is formed on the circuit board 23 </ b> B, a part around the mounting microphone 231, for example, the outside.
The action of the notch 23b is almost the same as the action of the notch 23a in FIGS.

Also in FIGS. 5 and 6, when the distance between the main antenna 24 and the metal shield case 22 is increased in order to ensure the characteristics of the main antenna 24, the protruding region R from the shield case 22 extends in the y direction. Will expand.
Also in this case, if the mobile phone is accidentally dropped, the circuit board 23B may be pushed down by the ribs of the front case 21.
As a result, as shown in FIG. 5B, the circuit board 23B in the large protrusion region R in the cross section taken along the line BB ′ formed around the contact portion is greatly subjected to the sag due to the drop impact. Since the mounting microphone 231 does not exist in this portion, the mounting microphone 231 is not affected.

On the other hand, as shown in FIG. 5C, the circuit board 23B in the small protrusion region R in the CC ′ line cross section is not easily transmitted to the mounting microphone 231 due to the presence of the notch 23b. The mounting microphone 231 is not dropped off because it is hardly affected by the impact.
Thus, securing the characteristics of the main antenna 24 and preventing the mounting microphone 231 from falling off are compatible.

As described above, according to the electronic apparatus according to the present embodiment, the housing 20, the circuit boards 23 and 23B disposed in the housing 20, and the electronic component (mounting microphone) mounted on the circuit board. , And at least part of the periphery of the electronic components of the circuit boards 23 and 23B are formed with cuts or notches 23a and 23b.
Thereby, peeling from the circuit board of the electronic component mounted in the circuit board by the load from the exterior of a housing | casing is suppressed.

In the present embodiment, the mounting microphone 231 that is an electronic component is mounted on the end of the circuit board.
As a result, even when an electronic component is mounted on the end of the circuit board that is most likely to vibrate, peeling of the electronic component mounted on the circuit board due to a load from the outside of the housing, for example, is suppressed. The

Furthermore, in the present embodiment, the shield case 22 is provided so as to overlap the circuit boards 23 and 23B, and the mounting microphone 231 that is an electronic component is not surrounded by the shield case 22.
Thereby, it is not surrounded by the shield case 22 on the basis of its function, and communicates with an electronic component that is likely to be peeled off from the circuit board by a load from the outside of the housing, for example, a photo sensor that needs to detect external illuminance or the outside. Peeling from a necessary circuit board such as an IrPA module is suppressed.

Further, in the present embodiment, the antenna 24 that is in contact with a portion corresponding to the portion where the mounting microphone 231 is mounted on the opposite surface of the surface where the mounting microphone 231 that is an electronic component of the circuit boards 23 and 23B is mounted. Have.
Thereby, since the antenna 24 is separated from the shield case 22, the sensitivity of the antenna 24 is improved. When the antenna 24 is formed at the ends of the circuit boards 23 and 23B, the antenna sensitivity is further improved, and the portion of the circuit board opposite to the surface on which the electronic components are mounted and the portion on which the electronic components are mounted. It is possible to dispose an antenna on the inner surface of the housing, which is disposed in a portion corresponding to the above and can easily transmit a load from the outside of the housing to the electronic component.

As described above, the electronic component is a voice conversion component such as a mounting microphone, and the elastic member 231a is provided between the voice conversion component and the housing.
This ensures sound pressure and further suppresses peeling of the electronic component mounted on the circuit board due to a load from the outside of the housing from the circuit board.

In the above-described embodiment, the casing according to the present invention is the first casing 20 of the foldable mobile phone, but it can also be applied to the second casing 30 and the casing of the non-foldable mobile phone. .
In addition, a cut or notch can be formed around a mounting component such as a photosensor or an IrPA module in the protruding region R of the shield case 22 other than the mounting microphone 231.
Furthermore, the present invention can also be applied to electronic devices other than mobile phones, such as digital cameras and PDAs.

It is a figure which shows the external appearance of the mobile telephone as a portable terminal device which concerns on embodiment of this invention in an open state, Comprising: (A) is a top view, (B) is a side view. It is a disassembled perspective view of the 1st housing | casing of FIG. The details of the 1st case of the cellular phone concerning a 1st embodiment of the present invention are shown, (A) is a top view, (B) is a BB 'line sectional view of (A), (C) is ( It is CC 'sectional view taken on the line of A). It is a top view explaining the protrusion area | region of the shield case of FIG. The details of the 2nd case of the cellular phone concerning a 2nd embodiment of the present invention are shown, (A) is a top view, (B) is a BB 'line sectional view of (A), (C) is ( It is CC 'sectional view taken on the line of A). FIG. 6 is a plan view for explaining a protruding region of the shield case of FIG. 5. It is a perspective view which shows the external appearance of the conventional foldable mobile telephone. It is a disassembled perspective view of the 1st housing | casing of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Mobile phone (electronic device), 20 ... 1st side housing | casing, 21 ... Front case, 22 ... Shield case, 23, 23B ... Circuit board, 23a, 23b ... Cut, 24 ... Main antenna, 25 ... Camera module, 26 ... rear case, 27 ... battery, 28 ... battery lid, 231 ... mounting microphone, 231a ... microphone sponge, 232 ... antenna tab, 30 ... second housing.

Claims (5)

A housing,
A circuit board disposed in the housing and having a contact portion that is directly or indirectly contacted with the housing;
Electronic components mounted around the contact portion of the circuit board;
Have
A portable electronic device in which a notch is formed in at least a part of the circuit board around the electronic component. The portable electronic device according to claim 1, wherein the electronic component is mounted on an end portion of the circuit board. The portable electronic device according to claim 2, further comprising an antenna that is in contact with a portion corresponding to a portion on which the electronic component is mounted on a surface opposite to the surface on which the electronic component is mounted on the circuit board. The portable electronic device according to any one of claims 1 to 3, wherein the electronic component is a voice conversion component, and an elastic member is provided between the voice conversion component and the housing. The portable electronic device according to claim 4, wherein the voice conversion component is a microphone.

Images