JPH07321688A - Built-in antenna of radio equipment - Google Patents

Abstract

PURPOSE:To make the equipment small and to reduce cost by extending one end of lock spring for mounting hooks provided inside a battery case so as to form the built-in antenna. CONSTITUTION:A mount hook energizing lock spring 5A made of a conductive metal of a battery case 10 in a slave set body 2 of a cordless telephone set is extended and expanded so as to be wound on a battery 12 thereby allowing the spring to act a built-in antenna 5. One end of the antenna 5 is exposed at an opening 10C provided to the case 10 and when a power supply section P is locked to the slave set body 2, an antenna contact 4 is in contact with the antenna 5 exposed in the opening 10C and connected to an RF module 3 via an antenna connection cord 4A. As a result, it is not required to reserve a mount space for the built-in antenna in the inside of the slave set body and then the volume of the telephone set is saved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a built-in antenna for a wireless device, such as a portable wireless device, a cordless telephone, a pager, and a pager, which is equipped with a battery and has a built-in antenna.

[0002]

2. Description of the Related Art As an antenna of a conventional wireless device equipped with a battery, a built-in antenna of a cordless telephone will be described. For example, a configuration is known in which a built-in antenna is arranged in a housing as shown in FIG. That is, in the same figure, inside the cordless telephone 50 main body 52 of the cordless telephone,
A separate loop antenna 55, which is a built-in antenna, is provided, and this is connected to an RF module 53 that constitutes a wireless circuit section with an antenna connection cord 55A.

The RF module 53 is supplied with power from the battery 12 in the battery case 60 mounted below the slave main body 52 to the slave main body 52 side via the power supply terminal 13. Further, the battery case 60 is locked to the attachment hook receptacle 63 on the slave unit main body 52 side by the attachment hook 61 urged by the elastic lock spring 62. At the same time, the main unit 5
2 side fitting recess 15 and battery case 60 side guide claw 14
Mate with.

[0004]

As described above, the built-in antenna of the conventional cordless telephone 50 has the cordless handset body 52.
Since the loop antennas 55 are individually installed therein, it is necessary to secure a mounting space for the loop antennas 55 in the slave main body 52. Therefore, the cordless telephone 50 inevitably becomes large in size, which makes it difficult to downsize the cordless telephone 50. Furthermore, the number of man-hours for mounting is necessary, and the problem of solving the cost increase due to the increased man-hour has been a problem.

In view of the above problems, it is an object of the present invention to provide a built-in antenna for a wireless device, which can realize a small wireless device by saving the mounting space of the built-in antenna and can reduce the cost by reducing the number of steps. And

[0006]

In order to achieve the above object, a built-in antenna of a wireless device according to the present invention is used for a mounting hook provided inside a battery case of a wireless device which communicates with at least the built-in antenna. The built-in antenna is configured by extending one end of a lock spring.

[0007]

In the built-in antenna of the wireless device according to the present invention, one end of the mounting hook lock spring provided inside the battery case is extended to function as the built-in antenna. In addition, the space for the antenna is not required, the size is reduced, and the man-hour is reduced to reduce the cost. In addition, diversity is possible in combination with existing antennas.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment applied to a cordless telephone as a wireless device having a built-in antenna according to the present invention will be described below with reference to FIGS. FIG. 1 shows an exploded perspective view of a cordless telephone 1 having a built-in antenna according to the present invention. FIG. 2 is an exploded perspective view showing the structure of the power supply unit P. In both figures, the cordless telephone 1 has a cordless handset including a cordless handset main body 2 and a power source unit P mounted below the cordless handset main body 2.

An RF module 3 forming a wireless circuit section is provided inside the main body 2 of the handset. To the RF module 3,
The antenna contact 4 is connected via the antenna connection cord 4A. Power is supplied to the RF module 3 from the battery 12 in the battery case 10 of the power supply unit P via the power supply terminal 13 to the slave unit main body 2 side.

The battery case 10 is composed of an upper case 10A and a lower case 10B as shown in FIG. Battery case 10
The mounting hook 11, the lock spring 5A, and the battery 12 are housed therein. The power supply unit P including the battery case 10 is
The slave hook body 2 is locked by the mounting hook 11 urged by the elastic lock spring 5A. At the same time, the fitting recess 15 on the side of the slave unit 2 and the guide claw 14 on the side of the battery case 10 are fitted together.

The lock spring 5A is made of a conductive material such as metal, and is extended and expanded so as to wind the battery 12 as shown in the drawing, and this serves as the built-in antenna 5. That is, the lock spring 5A with the extended configuration
Is configured to also serve as the built-in antenna 5. One end of the built-in antenna 5 has an opening 10 provided in the upper case 10A.
It is exposed at C, and when the power source part P is locked to the slave main body 2, the antenna contact 4 comes into contact with the built-in antenna 5 exposed at this opening 10C, and becomes electrically conductive.
As a result, the built-in antenna 5 is coupled to the RF module 3 via the antenna contact 4 and the antenna connection cord 4A.

As described above, according to the present invention, the lock spring 5 for biasing the mounting hook, which is made of a conductive metal, in the power source portion P is used.
By changing the shape and dimension of A and expanding and deploying the battery 12 so as to be wound, this is also used as the built-in antenna 5. With this configuration, there is no need to secure a mounting space for the built-in antenna inside the main unit,
The volume of the cordless telephone is reduced.

Further, the built-in antenna 5 configured as described above can be combined with an existing rod antenna or the like installed in the main body of the slave unit or the like to form a diversity antenna configuration.

Note that the guide claw 14 and the fitting recess 15 may be used as a connection connector portion for connecting the built-in antenna 5 and the RF module 3.

[0015]

As described above, the built-in antenna of the wireless device according to the present invention is configured such that the lock spring for the mounting hook in the power supply section is also used as the built-in antenna, so that the mounting space for the built-in antenna is omitted. It is possible to reduce the size of the wireless device. Also,
Compared with the configuration of the conventional wireless device, the mounting hook lock spring can be implemented by only replacing it with a different shape, so that there is an effect that it can be realized at low cost. further,
By combining with an existing rod antenna or the like, a diversity antenna configuration can be easily realized.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a cordless telephone which is a wireless device having a built-in antenna according to the present invention.

FIG. 2 is an exploded perspective view of the configuration of a power supply unit in FIG.

FIG. 3 is an exploded perspective view of a conventional cordless telephone.

[Explanation of symbols]

 1 cordless telephone (radio device) 2 main unit 3 RF module 4 antenna contact 4A antenna connection cord 5 built-in antenna 5A lock spring 10 battery case 10C opening 11 mounting hook 12 battery 13 power terminal 14 guide claw 15 mating recess P power supply Department

Claims (1)

[Claims] 1. A wireless device for communicating with at least a built-in antenna, wherein one end of a lock spring for a mounting hook provided inside the battery case is extended to form the built-in antenna. Built-in antenna.