JP2828510B2 - Wireless device terminal shield structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield structure of a radio equipment terminal including a portable telephone, a cordless telephone and the like.

It is needless to say that the ultimate purpose of communication is to be able to immediately transmit or exchange information or information to anyone at any time, from anywhere, and to perform mobile communication in addition to the conventional fixed point mutual communication. Is gradually evolving.

[0003] Mobile communication is communication between a mobile unit (including a person) such as a ship, a car, and an aircraft and a general subscriber telephone or an office and communication between the mobile units. Cordless phones and the like are included.

[0004] Recent wireless device terminals such as portable telephones are required to be mounted more and more densely with lighter weight, smaller size and higher functionality, and there is a tendency for higher integration of constituent elements and higher speed of a clock circuit. Therefore, a shield for preventing leakage is required in a circuit portion that generates an electromagnetic wave, and a shield for preventing entry of the electromagnetic wave is required in a circuit portion that is not likely to receive the electromagnetic wave.

[0005]

2. Description of the Related Art In a conventional general portable telephone, a radio device is mounted on a case made of sheet metal, aluminum die cast or the like, and is unitized. The control unit is covered with a sheet metal or the like, and this part is also unitized.

As described above, conventionally, the electromagnetic wave is shielded by individual independent units such as the radio unit and the control unit, and the individual independent units are assembled to take the electromagnetic wave shield of the entire apparatus. I have.

[0007]

Conventionally, the electromagnetic shielding of each unit has been conventionally used, so that the adjustment of each unit can be easily performed. However, it is difficult to adjust the individual unit as a portable telephone, and further assembling. In this case, it is necessary to fix each unit to the housing.

For this reason, there is a problem that it takes a lot of disassembly man-hours to adjust the control section and the like, and there is a problem that the individual units are independent, which hinders miniaturization of the apparatus. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shield structure of a wireless device terminal capable of minimizing the device while minimizing the number of assembling steps. .

[0010]

According to the present invention, a control unit substrate having a control circuit component mounted thereon and a wireless device portion substrate having a wireless device circuit component mounted thereon are placed in a shield case in which the surface of a resin mold case is made conductive. The wireless device / control unit integrated module is assembled by mounting from the direction, and the wireless device / control unit integrated module is housed in a resin mold housing whose inner surface is made conductive.

[0011]

According to the present invention, the shield case in which the surface of the resin mold case is made conductive is used as a chassis, and the control unit substrate and the radio unit substrate are attached to the chassis-formed shield case from opposite directions. The electromagnetic shield can be easily and reliably secured. further,
A test as a module integrated with a wireless device and a control unit can be easily performed.

[0012]

FIG. 1 is an exploded perspective view of a radio / control unit integrated module which is a characteristic part of the shield structure of the present invention, and FIG. 2 is a perspective view of the module assembled to the module. In the figure, reference numeral 2 denotes a shield case in which a metal vapor deposition film or a plating film is formed on the surface of a resin mold case to make it conductive, and in the present invention, this shield case 2
Is used as a chassis. The reason why the shield case 2 is formed from a resin mold is to reduce the weight and mass production. Since the resin mold case itself does not have a shielding function for electromagnetic waves, the shield case is formed by conducting the conductive process. .

A control unit substrate 4 on which control circuit components are mounted is mounted on the shield case 2 from above, and a radio unit substrate 6 on which radio circuit components 18 such as a transmitter and a radio unit are mounted is mounted from below. You.

An LCD 8 is mounted on the control section board 4, and a connector 16 is provided which is connected to a connector provided on an automobile when used as an automobile telephone. A coaxial cable 14 connected to the microphone module 12 and the wireless device is further connected to the control unit substrate 4.

When the control unit substrate 4 is mounted on the shield case 2, it is positioned by the outer shape of the shield case 2,
The height direction is regulated by the control unit substrate 4 being placed on the ribs of the shield case 2. The radio unit substrate 6 is positioned with respect to the shield case 2 by guide pins, and is fixed by four claws 20 provided on the side surface of the shield case 2. The integrated radio and control unit module 10 assembled in this manner is shown in FIG. 2. By using the shield case 2 as a chassis, the control unit and the radio unit can be electromagnetically isolated. It is possible to improve assemblability when assembling into a mobile phone. further,
Since it is assembled as the wireless device / control unit integrated module 10, a function test or the like in this state can be easily performed.

The wireless device / controller integrated module 10 assembled as described above is housed in a rear case 24 and a front case 26 as shown in FIGS. 3 and 4, and is assembled as a portable telephone. The inner surfaces of the rear case 24 and the front case 26 are subjected to a conductive process by forming a metal deposition film or a plating film.

The rear case 24 is provided with ribs 28 each having a long groove for separating the individual radio circuit components from other components. A shield member 30 is press-fitted into the long groove of the rib 28, and a shield member 30 is formed. 3 is pressed against the ground pattern of the radio unit substrate 6 as shown in FIG.
Each radio circuit component is electromagnetically shielded.

The front case 26 is provided with a switch part protection cover 32 which also functions as a sound collector, and is rotatably attached thereto. An earphone unit 34 is connected to the switch part protection cover 32. A switch panel 36 serving as a light guide plate is further attached to the front case 26.

Reference numeral 22 denotes a key top sheet made of rubber, which is mounted on the control board 4 of the integrated radio / control module 10. A battery case 40 in which a battery pack 38 is housed is detachably attached to the rear case 24 as shown in FIG.

[0020]

According to the present invention, as described in detail above, a shield case in which the surface of a resin mold case is made conductive is used as a chassis, and a control unit substrate and a radio unit substrate are attached to this shield case from opposite directions. As a result, since it is assembled as a wireless device / controller integrated module, the assemblability can be improved, the electromagnetic shield can be reliably taken, and the device can be downsized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a wireless device / control unit integrated module according to the present invention.

FIG. 2 is a perspective view of a wireless device / control unit integrated module.

FIG. 3 is a sectional view of an embodiment of the present invention.

FIG. 4 is an exploded perspective view of the embodiment of the present invention.

[Explanation of symbols]

 2 Shield case 4 Control board 6 Radio unit board 10 Radio / control unit integrated module 22 Key top sheet 24 Rear case 26 Front case 32 Protective cover

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H05K 9/00

Claims (1)

(57) [Claims] 1. A control part board (4) having a control circuit component mounted on a shield case (2) having a resin mold case surface made conductive, and a radio part board having a radio circuit part mounted thereon
(6) are mounted from opposite directions to assemble the integrated transceiver / controller module (10), and then mount the integrated transceiver / controller module (10) on the inner surface of a resin mold housing ( 24,26) A shield structure for a wireless device terminal, wherein the shield structure is accommodated in a wireless device.