JPS63138840A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To attain excellent communication even among rooms of a building or the like shielded in terms of radio wave by coupling spaces where a main set and a sub set exist by means of electric communication. CONSTITUTION:Antennas 1, 2 consist of a film base and are adhered onto an inner face of a window pane of floors F1, F2 or the like. Matching circuits 4, 5 are made of the film base and connected to a feeder 3. When a carrier M of a sub set B in the floor F2 makes a call, a radio wave is radiated from an antenna Ba to a space in the room. The radio wave is received by the antenna 2, fed to the antenna 1 via the feeder 3 and the matching device 5 and radiated into the floor F1 as the radio wave. The radio wave is received by an antenna Aa of the main set A, to a speaker or a telephone line L, allowing the call with an external line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a cordless telephone that can make calls between rooms that are radio wave-blocked.

[Prior Art] Cordless telephones usually have a main set A connected to a telephone line and a portable subset B as shown in FIG.
By transmitting and receiving radio waves between the antennas Aa and Ba connected to the transmitting and receiving circuits of each set A and H, calls can be made between subset A and the main 958, and from subset B via main set A. It is now possible to make calls to outside lines. In this way, users who carry a cordless telephone are extremely convenient because they can make calls when they need it from wherever they are. In addition, they are often used instead of extension telephones between floors of buildings.

In this case, unlike a normal extension telephone, the place where you can make a call is not restricted by the code, and you can make a call without having to move, so it is extremely useful.

[Problems to be solved by the invention] However, when using an extension telephone as described above, it is sufficient if the subset and the main set are connected by radio waves, but in current building construction, etc. There was a problem in that good communication was not possible because the rooms were constructed so that radio waves were blocked by concrete-layered walls and tall, sealed windows and doors.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a cordless telephone that allows good communication even between rooms in a building or the like where radio waves are blocked.

[Means for Solving the Problems] A cordless telephone according to the present invention is provided with a transmission means for electrically connecting the space where the main set and the subset exist.

[Operation] In this invention, since the transmitted radio waves emitted from one set are electrically transmitted from the space where that set exists to the space where the other set exists by the transmission means, in addition to 4. Good communication can be achieved even if the network is cut off by a concrete wall or the like.

[Embodiment of the Invention] An embodiment of the invention will be described below with reference to FIGS. 1 and 2.

In the figure, Fl is the first floor where the main set A is installed at a predetermined location, F2 is the second floor where the carrier M of subset B is present, and both floors F1 and F2 are radio wave-blocked. Further, 1 is a first antenna provided in the first floor Fl, which transmits and receives radio waves to and from the main set A, and 2 is a second antenna provided in the second floor F2, which is connected to the subset A. Sends and receives radio waves to and from B.

Reference numeral 3 denotes a power supply line installed from inside the first floor Fl to inside the second floor F2, and both ends thereof are connected to an impedance matching circuit 4.
5 to said first antenna 1.2;
As described above, 1 to 5 constitute a transmission means.

FIG. 2 is a front view and a side view showing the specific structure of the transmission means in this embodiment.

In this embodiment, the antenna 1.2 is made of a film substrate formed by forming a copper foil c on a base film f, and is pasted with an adhesive tape T to the inner surface of the window glass W of each floor Fl and F2, respectively. ing. In addition, this antenna 1.2
is a 4-stage collinear array antenna, approximately 9dB.
has a gain of

Further, the matching circuits 4 and 5 are also formed of a film substrate like the above-mentioned antenna, and are connected to the power supply line 3 via terminals 6a and 6b.

In the cordless telephone having the above configuration, when a carrier M of subset B on the second floor F2 performs a call operation, radio waves are radiated from the antenna Ba into the indoor space, but the floor Fl is radio-wave-blocked. Because of this, the light is reflected off the ceiling and floor and is not transmitted outside the room.

However, this radio wave is received by the antenna 2 and converted into an electrical signal. This electric signal is transmitted to the feed line 3 via the matching box 5, and further supplied from the feed line 3 via the matching box 5 to the antenna l, from which it is radiated into the first floor F2 as a radio wave. Ru. After this radio wave is received by antenna Aa of main set A and converted into an electrical signal, it is input to the receiving circuit in main set A, from where it is sent out to the speaker of main set A or the telephone line, and is sent to the outside line. A call will be made with. Also, main set A
The radio waves transmitted from the antenna 1, matching circuit 4, etc. Power supply line 3. ! I! The signal is transmitted from the antenna 2 to the second floor F2 via the combining circuit 5 and received by the antenna Ba of the subset B. In this way, by providing a transmission means, even between floors Fl and F2, which are radio-blocked,
A good conversation can be made between main set A and subset B.

In the above embodiment, the antennas 1 and 2 were constructed from a film substrate, but other antennas may be used as long as they can transmit and receive data to and from both sets, that is, antennas similar to those provided on both sets. Moreover, the installation location is not limited to the above embodiment as long as it is a place where reception is easy.

[Effects of the Invention] As explained above, according to the present invention, there is an effect that good communication can be performed even if the main set and the subset are blocked in terms of radio waves.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIG. 2 (a
) is a front view showing the configuration of the transmission means in this embodiment,
Figure (b) is a left side view of the one shown in Figure (a).
The figure is a front view showing a conventional cordless telephone. l... First antenna 2... Second antenna Transmission means 3...
... Feed line 4.5 ... ... Matching circuit A ... ... Main set B ... ... Subset applicant Tokyo Heavy Equipment Industry Co., Ltd. Figure 2 (b) (a)

Claims (2)

[Claims] (1) A cordless telephone consisting of a main set connected to a telephone line and equipped with a wireless transmitter/receiver circuit, and a subset equipped with a transmitter/receiver circuit capable of wireless communication with the main set, which is radio-blocked. A cordless telephone characterized by comprising a transmission means for electrically connecting the two sets of spaces. (2) The transmission means comprises an antenna provided in each space, a feed line connecting both antennas, and a matching box interposed between both antennas and the feed line. The cordless telephone described in item 1.