JPH04220851A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To reduce the effect of an electromagnetic wave onto a head of a human body by incorporating a transmission antenna for a telephone set main body into the cordless telephone set and coating a side face of a handset with an electromagnetic wave shielding member. CONSTITUTION:The electromagnetic wave shielding member 7 is formed into a lamination structure comprising an electromagnetic wave absorbing body 7a and an electromagnetic wave reflecting body 7b, which reflects/absorbs only the electromagnetic wave radiating from a transmission antenna 5 incorporated in the telephone set main body 2 thereby reducing the effect of the electromagnetic wave onto a head of a human body. Moreover, a paint having a shield effect against the electromagnetic wave may be coated to an outer face or an inner face of the telephone set main body 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone device that includes a transmitter and a receiver, and a built-in transmitting antenna.

0002

2. Description of the Related Art FIG. 4 is a usage state diagram of a portable radio telephone device disclosed in, for example, Japanese Unexamined Patent Publication No. 59-92629.
In the figure, (1) is the user, (2) is the main body of the telephone device, the handset is attached to the handset section (3) at one end, and the transmitter is attached to the transmitter section (4) at the other end. Built-in. (5)
(6) is a transmitting antenna, and (6) is a non-radiating member provided at a position facing the human head (1a) of the transmitting antenna (5).

Next, the operation of the above-mentioned conventional device will be explained. A user (1) uses the telephone device body (2) held in his hand with the receiver (3) facing his ear and the transmitter (4) facing his mouth. In this state of use, the position of the transmitting antenna (5) facing the human head (1a) is covered with the non-radiating member (6).
) is mainly generated above the head of the user (1), and has little effect on the human head (1a) of the user (1).

0004

[Problem to be Solved by the Invention] Since the conventional cordless telephone device is constructed as described above, the transmitting antenna is provided protruding from the outside of the telephone device main body (2).
There are problems such as an unsightly appearance and a tendency to break the transmitting antenna. Therefore, it is possible to incorporate the transmitting antenna into the telephone device main body (2), but in this case, the transmitting antenna cannot be covered with a non-radiating material, so it is necessary to prevent the influence of electromagnetic waves on the human body when using the telephone device. The problem is that it is not possible.

[0005] This invention was made to solve the above-mentioned problems, and aims to reduce the influence of electromagnetic waves on the human head in a cordless telephone device with a built-in transmitting antenna. .

[0006]

[Means for Solving the Problems] A cordless telephone device according to the present invention has a built-in transmitting antenna in the main body of the telephone device, and the side surface of the handset is covered with an electromagnetic wave shielding member.

[0007]

[Operation] Since the electromagnetic wave shielding device of the present invention covers the side surface of the handset, it is located between the transmitting antenna and the human head, and shields the electromagnetic waves radiated from the transmitting antenna toward the human body. , to reduce the impact on the human body.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view showing a cordless telephone device, FIG. 2 is a side view thereof, and FIG. 3 is an enlarged sectional view of a portion thereof. In FIGS. 1 to 3, (2) is the telephone device main body;
(3) is a receiver section, (4) is a transmitter section, and (5) is a transmitting antenna, which are the same as the conventional device shown in FIG. 4 and will not be described again. (7) is the telephone device body (
2) is an electromagnetic wave shielding member provided on the surface facing the human head (1a).

As shown in FIG. 3, this electromagnetic wave shielding member (7) has a laminated structure of an electromagnetic wave absorber (7a) and an electromagnetic wave reflector (7b), and is connected to a transmitting antenna built into the telephone device body (2). (5) Of the electromagnetic waves radiated from the body, only the electromagnetic waves radiated toward the human body are reflected and absorbed, thereby reducing the influence of electromagnetic waves on the human body.

[0011] In the above embodiment, the electromagnetic wave shielding member (7
) is integrally molded as a part of the telephone device main body (2), but there is an electromagnetic wave shielding member (7) inside the telephone device main body (2).
Alternatively, a paint having a shielding effect against electromagnetic waves may be applied to the outer or inner surface of the telephone main body (2) facing the human body.

0012

[Effects of the Invention] As described above, according to the present invention, since the electromagnetic wave shielding member is provided between the transmitting antenna built into the main body of the telephone device and the human head, the structure is relatively simple. Therefore, the influence of electromagnetic waves on the human head during a call can be significantly reduced, and the adverse effects of electromagnetic waves on the human body can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a cordless telephone device according to an embodiment of the invention.

FIG. 2 is a side view of a cordless telephone device according to an embodiment of the invention.

FIG. 3 is a longitudinal sectional view of a portion of a cordless telephone device according to an embodiment of the invention.

FIG. 4 is a usage state diagram of a conventional cordless telephone device.

[Explanation of symbols]

(2) Telephone device body (3) Handset section (4) Transmitter section (5) Transmission antenna (7) Electromagnetic wave shielding member

Claims (1)

[Claims] Claim 1: A device body comprising a transmitter section and a receiver section provided on one side of the device body, a transmitting antenna built in on the other side, and an electromagnetic wave shielding member that covers the side surface of the transmitter and receiver. cordless telephone equipment.