JPH0543645U - Cordless answering machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To be able to adjust the receiving and transmitting sensitivities of antennas in cordless answering machines. [Structure] A planar antenna 15 is provided on the back surface of a cassette lid 14 of a cassette housing portion 13 for housing a microcassette tape 12 formed on an upper portion of a housing 11 of a cordless answering machine. Since the antenna height is changed by opening / closing the cassette lid 14, the transmission / reception sensitivity of the antenna 15 can be adjusted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cordless answering machine with a built-in antenna.

[0002]

[Prior Art]

 FIG. 2 shows an external structure of a conventional cordless answering machine of this type. In FIG. 2, reference numeral 1 denotes a built-in antenna, which is fixed to a housing 2 of a cordless answering machine. Reference numeral 3 is a feeding point for the built-in antenna 1. Therefore, the conventional built-in antenna 1 can be operated with a certain reception sensitivity and transmission sensitivity.

[0003]

[Problems to be solved by the device]

 However, in the above conventional cordless answering machine, there is a problem that it cannot be sufficiently dealt with in cases such as an increase in wireless noise due to an increase in the communication distance and the lack of receiving and transmitting sensitivities of the built-in antenna due to shields. was there .

The present invention solves such a conventional problem, and an object of the present invention is to provide an excellent cordless answering machine capable of adjusting the reception sensitivity of a built-in antenna without using an amplifier circuit or the like.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a planar antenna on the lid of the cassette that houses the microcassette tape of the cordless answering machine, and changes the antenna height by opening and closing the lid. is there.

[0006]

[Action]

 Therefore, according to the present invention, since the antenna height is changed by opening and closing the lid of the cassette that accommodates the microcassette tape of the cordless answering machine, the receiving sensitivity and the transmitting sensitivity can be adjusted.

[0007]

【Example】

 FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, reference numeral 11 is a housing of a cordless answering machine, and a cassette housing portion 13 for housing a microcassette tape 12 is formed on an upper portion thereof. Reference numeral 14 denotes a cassette lid for opening and closing the cassette housing portion 13, which is hinged to the housing 11. Reference numeral 15 is a planar antenna provided on the back surface of the cassette lid 14 and formed in a loop shape. Reference numeral 16 is a feeding point for the antenna 15.

Next, the operation of the above embodiment will be described. In the above-mentioned embodiment, the cassette lid 14 is usually used with being closed. When the reception state deteriorates, the antenna height of the antenna 15 is increased by opening the cassette lid 14, and the reception sensitivity of the antenna 15 is improved. Then, a good electric wave without noise is fed to the feeding point 16. Also, by performing the same operation, the receiving sensitivity of the antenna 15 is improved and the transmitting sensitivity is also improved, so that the radio wave fed to the feeding point 16 can be radiated more strongly and the radio wave can be transmitted further. be able to.

As described above, according to the above-described embodiment, when the cassette lid 14 is opened, the antenna height of the antenna 15 increases, so that the receiving sensitivity of the antenna 15 can be improved, and sufficient radio wave can be transmitted to the feeding point 16. Has the effect of being able to supply power. Further, in the same manner, since the transmission sensitivity of the antenna 15 can be improved, there is an effect that the electric wave fed to the feeding point 16 can be further propagated.

[0010]

[Effect of the device]

 As is apparent from the above-described embodiment, the present invention has a planar antenna arranged on the lid of the cassette that houses the microcassette tape, and opening and closing the cassette lid changes the antenna height. It has the effect that the transmission and reception sensitivity can be adjusted.

[Brief description of drawings]

FIG. 1 is an external perspective view of a cordless answering machine showing an embodiment of the present invention.

FIG. 2 is an external perspective view showing an example of a conventional cordless answering machine.

[Explanation of symbols]

 11 Cordless Answering Machine Housing 12 Microcassette Tape 13 Cassette Storage 14 Cassette Lid 15 Antenna 16 Feed Point

Claims (1)

[Scope of utility model registration request] 1. A cordless answering machine in which a planar antenna is arranged on a lid of a cassette that accommodates a microcassette tape, and the antenna height is changed by opening and closing the lid of the cassette.