JPH09181637A - Portable radio equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce sensitivity degradation due to noise or the like and to improve communication quality by providing a shielding plate for preventing the noise from a display part and a control part, a conductive layer on the inner surface of a front case, a conductive connection material, a contact layer and a ground metal fitting. SOLUTION: The shielding plate 2 for connecting an antenna 9, the ground of a radio part 7, a liquid crystal display module 3 and a control part 1 is provided between the antenna 9 and the ground of the radio part 7 and between the liquid crystal display module 3 and the control part 1 so as to prevent the noise from the control part 1 and the liquid crystal display module 3 and to drop an antenna current. Also, the shielding plate 2 and a sheet key 5 are connected by the conductive connection material, a copper foil tape 4 for instance, so as to widen the ground. The conductive layer 11 is executed to the inner surface of the front case 8 so as not to receive the influence from the conductor of a human body or the like and to widen the ground. The sheet key 5 and the control part 1 are connected by the conductive connection material, the copper foil tape 6 for instance. The antenna 9 and the radio part 7 are connected through the ground metal fitting 10 to the control part 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile wireless device such as a mobile phone, and more particularly to a mobile wireless device having a structure for shielding from a liquid crystal display module and a control unit and grounding.

[0002]

2. Description of the Related Art FIG. 3 is a cross-sectional view showing an example of a conventional portable wireless device, and FIG. 4 is a perspective view of a conventional main part. In FIGS. 3 and 4, 1 is a control unit using a printed circuit board of a mobile phone, 3
Is a display unit, for example, a liquid crystal display (LCD) module, 5 is a sheet key made of aluminum, 7 is a wireless unit using a printed circuit board, 8 is a front case, 9 is an antenna using a printed circuit board, and is connected to the ground side of the wireless unit 7. It is grounded. Conventionally, when the antenna 9 is housed in a housing of a mobile phone, the antenna gain is compensated by radiation of the housing.

[0003]

However, in the above-mentioned conventional example, the control section 1 and L are controlled in the antenna radiation.
The noise from the CD module 3 is superposed by the radiation and has an influence on the sensitivity deterioration. At the time of housing the antenna, it is easily influenced by the conductor such as a human body due to the antenna length and structure, and the sensitivity is significantly deteriorated. There is a problem.

[0004]

The device of the present invention reduces the sensitivity deterioration due to noise from the control unit and the display unit when the antenna is housed in the above-mentioned prior art, and is shielded by a conductor such as a human body and a ground. In order to provide a portable wireless device having a structure, as shown in FIG. 1, a shield plate 2 for shielding noise from the display unit 3 and the control unit 1 to reduce the antenna current and an influence from a conductor are provided. A conductive layer 11 provided on the inner surface of the front case 8 for not receiving it and for widening the ground, conductive connecting members 4, 6 provided on the sheet key 5 for widening the ground, and a front case 8 for which the conductive treatment has been performed. It is characterized in that it is provided with a contact layer 8A for bringing the part 1 into conductor contact with it, and an earth metal fitting 10 for connecting the earth of the radio part 7 to the earth of the control part 1.

[0005]

1 (A) and 1 (B) are a sectional view and a perspective view showing a part of an embodiment of a radio device of the present invention, and FIG. 2 is a perspective view of a main part thereof. is there. 1 and 2, 1 is a control unit using a printed circuit board of a mobile phone, 3 is a display unit, for example, a liquid crystal display (LCD) module, 5 is a sheet key made of aluminum, 7 is a wireless unit using a printed circuit board, and 8 is The front case 9 is an antenna using a printed circuit board and is grounded to the ground side of the wireless unit 7.
In order to prevent noise from the control unit 1 and the liquid crystal display module and to reduce the antenna current, the antenna 9 and the wireless unit 7 are provided.
A shield plate 2 for connecting these is provided between the grounds and between the liquid crystal display module 3 and the control unit 1, and a conductive connecting material, for example, copper, is provided between the shield plate 2 and the sheet key 5 for widening the ground. Connect with foil tape 4. A conductive layer 11 is provided on the inner surface of the front case 8 so as not to be influenced by a conductor such as a human body and to widen the ground. A conductive connecting material, for example, a copper foil tape 6 is connected between the sheet key 5 and the control unit 1 to widen the ground. The control portion 1 and the conductive layer 11 of the boss 8A of the front case 8 having the inner surface subjected to the conductive treatment.
The gold-plated pattern 1A is brought into contact with the conductor, and the ground of the wireless section 7 is connected to the ground of the control section 1 by the grounding metal fitting 10.

That is, in this embodiment, the LCD module 3 is shielded in order to prevent noise from the LCD module 3 and is grounded at a high frequency so that the front case 8 is protected from the influence of the conductor. In order to make the inner surface conductive and widen the antenna ground, the contacts were made as follows. The antenna 9 and the wireless unit 7 are connected to the copper foil tape 4 via the shield plate 2 and the conductive layer 11 on the inner surface of the front case 8, and the copper foil tape 4 is provided with the sheet key 5, the copper foil tape 6, and the control. The conductive layer 11 on the inner surface of the front case 8 is connected via the portion 1, and the antenna 9 and the wireless portion 7 are connected to the control portion 1 via the ground metal fitting 10.

[0007]

As is apparent from the above description, according to the present invention, significant sensitivity deterioration due to noise from the control unit and the display unit when the antenna is housed or an influence from a conductor such as a human body is reduced, and the communication quality is improved. It is possible to improve.

[Brief description of the drawings]

1A and 1B are a cross-sectional view and a perspective view of a part showing an example of an embodiment of a wireless device of the present invention, respectively.

FIG. 2 is a perspective view of a main part of the same.

FIG. 3 is a sectional view showing an example of a conventional portable wireless device.

FIG. 4 is a perspective view of a conventional main part.

[Explanation of symbols]

 1 Control part 1A Metal plating pattern 2 Shield plate 3 Display part of liquid crystal display (LCD) module etc. 4 Conductive connection material (copper foil tape) 5 Sheet key 6 Conductive connection material (copper foil tape) 7 Radio part 8 Front case 8A Boss 9 antenna 10 grounding metal 11 conductive layer

Claims (1)

[Claims] 1. A shield plate for shielding the noise from the display section and the control section to reduce the antenna current, and a shield plate on the inner surface of the front case for not being influenced by the conductor and for widening the ground. Conductive layer, conductive connecting material on the sheet key to widen the ground, contact layer for conducting the conductive case between the front case and control unit, and ground for connecting the radio unit ground to the control unit ground A portable wireless device comprising a metal fitting.