JP4666998B2 - Communication equipment - Google Patents

Description

  The present invention relates to a communication device such as a mobile phone.

  Conventionally, an antenna of a communication device such as a mobile phone has a structure that extends from the inside of the housing to the outside in order to ensure its antenna characteristics (sensitivity, etc.), and although it requires some space, the main part of the antenna Is exposed to the outside, the internal parts have little influence on the antenna. Therefore, constraining influences on the inside of the casing by the antenna are not so much.

However, in recent years, built-in antennas are often used in communication devices such as mobile phones in order to reduce the size and improve portability. For example, Patent Document 1 discloses a chip antenna that is a built-in antenna provided on a flexible substrate, and the flexible substrate is fixed to a shield case.
JP 2000-134020 A

  However, in such a conventional communication device, when there is another metal member around the antenna due to the incorporation of the antenna, the wireless communication function of the antenna is hindered by the metal of the other member, and If the antenna is built in a position where this can be avoided, the communication device becomes large, and there is a problem that it is not easy to secure a space for arranging the antenna in the housing.

  Therefore, in view of the above problems, the present invention can effectively reduce the size of the antenna by preventing the wireless communication function of the antenna from being obstructed and securing the antenna arrangement space. It is an object of the present invention to provide a communication device that can perform communication.

In order to solve the above problems, the present invention
A circuit board on which a plurality of electronic components are arranged;
In a communication device having a conductive shield case provided on the circuit board by covering the electronic component and forming a closed space between the circuit board and the circuit board,
The electronic component disposed on the circuit board includes at least one antenna unit,
The surface shape of the shield case is formed to avoid the antenna part,
A non-conductive cover is provided at the position of the circuit board corresponding to the portion of the shield case surface shape that avoids the antenna part ,
The roof surface portion of each of the cover and the shield case forms substantially the same surface having substantially the same height,
A key structure body in which a plurality of keys are provided so as to be operable is arranged on the outside in the height direction of each roof surface portion .

Further, in the communication device, one of the plurality of keys is arranged opposite to the outside in the height direction of the roof surface portion of the cover .

Further, in the communication device, the cover has a rib or a leg so that the pressing force applied to the roof surface portion of the cover when the key is operated can be supported. .

Further, in the communication device, each of the cover and the shield case has a joint portion that can be joined to each other, and the joint portion can be joined by an engageable concave portion and a convex portion. Is.

In the communication device, the concave portion and the convex portion are detachable from each other .

  As described above, according to the communication device of the present invention, the wireless communication function of the antenna can be prevented from being hindered, and the arrangement space for the antenna can be secured, thereby reducing the size of the communication device. Can be realized.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
1 to 5 are diagrams which are referred to for describing a first embodiment of a communication device according to the present invention.

  FIG. 1 is a diagram illustrating a housing 12 in which an operation unit 14 in which a plurality of keys 16 are arranged so as to be operable is formed in a mobile phone 10 (communication device) according to the present embodiment. A hinge 18 is provided at the upper end of the housing 12 in the drawing so as to be pivotably connected to a hinge provided on the other housing (not shown). In addition, a microphone 20 used at the time of a telephone function call is provided at the lower end of the housing 12 in the figure.

  As shown in FIG. 2, the housing 12 is composed of an upper case 12a and a lower case 12b, and the inside of the upper case 12a is turned on by pressing the key 16 on a hard surface. A key module 22 (key structure) having a switch element is arranged.

  When the key module 22 is assembled to the upper case 12a, each of the keys 16 is fitted into each of the key fitting holes 12c formed in the upper case 12a, and the tip portion is exposed to the outside. It is supposed to do.

  Between the key module 22 and the lower case 12b, a circuit board 24 in which a plurality of electronic components (not shown) are arranged on the surface on the key module 22 side is arranged. A shield case 26 having a hard roof surface portion 26 b is provided on the same side surface of the circuit board 24 so as to cover the plurality of electronic components and form a closed space between the circuit board 24 and the circuit board 24. ing.

  As shown in FIG. 2, an antenna chip 28 (antenna portion) is provided on the surface of the circuit board 24 opposite to the shield case 26 at the position shown in FIG.

  The shield case 26 is made of hard plastic, and a plurality of ribs 26a (leg portions) are integrally formed on the circuit board 24 side. Since the roof surface portion 26b and the rib 26a of the shield case 26 are subjected to metal plating, the key 16 of the key module 22 is pressed on the roof surface portion 26b even if the shield case 26 is thinned. Sometimes, it can have strength against the pressing force applied from above. For this reason, the shield case 26 constitutes a conductive member.

  Further, as shown in FIG. 4, the shield case 26 is formed in a shape in which the upper left portion of the roof surface portion 26b in the figure is cut out. As shown in FIG. 1, the cover 30 is assembled in a state where the cover 30 is disposed.

  In FIG. 2, the antenna chip 28 provided on the lower case 12 b side of the circuit board 24 is disposed on the lower case 12 b side of the cover 30 so as to overlap the cover 30 in the vertical direction. On the case 12a side, a key 16 provided in the key module 22 and corresponding to the function key “F1” in FIG. 1 is arranged at a position overlapping the cover 30 in the vertical direction.

  As shown in FIG. 4, a convex portion 30 b (joining portion) protruding rightward is formed on the right side of the cover 30 in the drawing, and the cutout portion of the upper left portion of the shielding case 26 in the drawing is formed. Is formed with a recess 26c (joint) that opens to the left.

  The cover 30 is joined to the shield case 26 by fitting the convex portion 30 b of the cover 30 into the concave portion 26 c of the shield case 26. And the convex part 30b of the cover 30 is joined to the recessed part 26c of the shield case 26 so that attachment or detachment is possible.

  The cover 30 is also formed of plastic like the shield case 26, but the roof surface portion 30a and the ribs 30c are not subjected to metal plating treatment like the shield case 26. Therefore, the cover 30 constitutes a non-conductive member that does not have conductivity.

  Since the cover 30 is formed at the same height as the shield case 26 as shown in FIG. 3B, the roof surface portion 30a forms the same surface as the roof surface portion 26b of the shield case 26. Yes. Like the shield case 26, the cover 30 is also provided with ribs 30c (leg portions) on the periphery thereof, and has a strength to resist the pressing force applied from above when the key 16 of the key module 22 is pressed.

  According to such a cellular phone 10, the upper and lower members of the antenna chip 28 are not subjected to metal plating, and the metal member is not disposed near the antenna chip 28 in the housing 12. The wireless communication function of the antenna chip 28 can be prevented from being hindered by the metal plating process or the metal member.

  Further, the convex portion 30b of the cover 30 is fitted and joined to the concave portion 26c of the shield case 26, and the roof surface portion 30a and the rib 30c of the cover 30 are not subjected to metal plating, so that the antenna chip is provided in the housing 12. 28 can be arranged, so that a space for arranging the antenna chip 28 in the housing 12 can be secured.

  As described above, according to the present embodiment, it is possible to prevent the wireless communication function of the antenna chip 28 from being hindered and to secure the arrangement space for the antenna chip 28, so It is possible to effectively reduce the size of the device.

  Further, a portion corresponding to the antenna chip 28 of the shield case 26 is cut out, and a separate cover 30 that is not subjected to metal plating treatment is disposed on the portion, whereby the metal plating treatment of the roof surface portion 26b of the shield case 26 is performed. Sometimes, when a portion corresponding to the antenna chip 28 is not cut out, a step such as a masking process required for the portion can be omitted, so that the cost of the metal plating process can be reduced.

  FIG. 6 is a diagram which is referred to for explaining the second embodiment of the present invention. In the first embodiment, the projection 30b is formed in the cover 30, the concave portion 26c is formed in the shield case 26, and the convex portion 30b of the cover 30 is only fitted into the concave portion 26c of the shield case 26. In contrast to this, the second embodiment is different in that it is configured as shown in FIG.

  That is, a small concave portion 30d is formed at the lower end of the convex portion 30b of the cover 30, and a small convex portion 26d is formed at the lower portion of the contact surface of the concave portion 26c of the shield case 26. For this reason, before assembling the shield case 26 to the circuit board 24, the small concave portion 30d of the cover 30 is temporarily fixed by sliding it vertically into the small convex portion 26d of the shield case 26, and then the shield case 26 is fixed. By assembling the circuit board 24 together with the cover 30, it is possible to improve the assembling property of the shield case 26 and the cover 30 to the circuit board 24.

  In the above embodiment, the case where the present invention is applied to a mobile phone has been described. However, the present invention can also be applied to a communication device other than a mobile phone such as a PDA (Personal Digital Assistant). .

  In the above embodiment, the shield case 26 is entirely made of plastic and is subjected to metal plating. However, a metal plate is used for the roof surface portion 26b of the shield case 26, and the metal plating is applied thereto. The treated plastic ribs may be adhered and used.

It is a top view which shows the housing | casing 12 which has the operation part 14 of the mobile telephone 10 which concerns on the 1st Embodiment of this invention. It is an AA line exploded sectional view of case 12 in FIG. It is a figure which shows the shield case 26 and the cover 30, FIG. 3 (a) is the top view, FIG.3 (b) is the side view. FIG. 3 is an exploded plan view showing a shield case 26 and a cover 30. It is the top view which shows the circuit board 24 simply. It is a perspective view which shows the principal part of the cover 30 and the shield case 26 of the mobile telephone which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mobile telephone 12 Case 12a Upper case 12b Lower case 12c Key fitting hole 14 Operation part 16 Key 18 Hinge 20 Microphone 22 Key module 24 Circuit board 26 Shield case 26a Rib 26b Roof surface part 26c Concave part 26d Small convex part 28 Antenna chip 30 Cover 30a Roof surface part 30b Convex part 30c Rib 30d Small concave part

Claims (5)

A circuit board on which a plurality of electronic components are arranged;
In a communication device having a conductive shield case provided on the circuit board by covering the electronic component and forming a closed space between the circuit board and the circuit board,
The electronic component disposed on the circuit board includes at least one antenna unit,
The surface shape of the shield case is formed to avoid the antenna part,
A non-conductive cover is provided at the position of the circuit board corresponding to the portion of the shield case whose surface shape is free from the antenna part,
The roof surface portion of each of the cover and the shield case forms substantially the same surface having substantially the same height,
A communication device, wherein a key structure body in which a plurality of keys are operably provided is arranged on the outer side in the height direction of each roof surface portion. 2. The communication device according to claim 1, wherein any one of the plurality of keys is arranged to face the outside in the height direction of the roof surface portion of the cover. The communication according to claim 1 or 2, wherein the cover has a rib or a leg so as to support a pressing force applied to a roof surface portion of the cover when the key is operated. machine. Each of the cover and the shield case has a joint that can be joined to each other,
The joint is
The communication device according to any one of claims 1 to 3, wherein the communication device can be joined by a concave portion and a convex portion that can be engaged. The communication device according to claim 4, wherein the joint portions are detachable from each other.

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