JPH055707Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] Recently, as communication devices have become smaller, it is common to have a number of communication devices arranged side by side on an operating table and use them depending on the purpose of use. In addition to power cords, speakers, headphones, microphones, and telephone key cords are routed around these devices, which can be difficult to organize. Cordless electric keys are known for this purpose, but remote controls that use radio waves, sound waves, or light beams have long been known as cordless remote controls for controlling the operation of devices.

[The problem that the idea aims to solve]

The present invention provides a cordless electric key with a cordless system and a cordless electric key in which the electric key operation is displayed, with the purpose of eliminating the desk complication caused by passing the cord attached to the electric key as described above.

[Means to try to solve the problem]

An embodiment of the present invention will be explained with reference to FIG. The light emitting state is controlled by the operation of the electric key 1, and the independent electric key body is equipped with an infrared light source _D1 that emits light to the outside and a visible light emitting source _D2 for monitoring, and the emitted light of the infrared light emitting source _D1 is It consists of a transmitter or transceiver 10 equipped with a receiving infrared light receiving element 11 on the panel surface,
This is a cordless telephone key device configured such that a transmitter or a transceiver 10 can transmit a key operation radio wave according to the operation of a telephone key 1.

FIG. 2 shows an example of the internal connection of the electronic key body, and the second
Figure A shows a case in which a key contact 2, a battery 3, a stabilizer resistor 4, an infrared light emitting diode _D1 and a visible light emitting diode _D2 are connected in series, and is suitable for use at a battery voltage of 4.5V or higher. Figure 2B shows the case where an infrared light emitting diode _D1 and a visible light emitting diode _D2 are connected in parallel and connected in series with the key contact 2 and the battery 3, which is suitable for use with a battery power supply of about 3V. It is convenient that the brightness of the infrared light emitting diode _D1 and the visible light emitting diode _D2 can be adjusted separately by adjusting the stabilizer resistors 5 and 6.

FIG. 3 shows an example of a light receiving circuit part on the transmitter side, in which a potential e generated at the time of light reception is transferred to a load resistor 13 of resistors 12 and 13 inserted in series with an infrared light element 11 and a power supply to a switching transistor 14. This is a circuit that conducts between the collector and emitter by applying the voltage between the base and emitter of . transistor 1
By simply connecting the collector/emitter of No. 4 in parallel with a normal electric key connection terminal (or jack), it can be used with either the conventional corded electric key or the cordless electric key of the present invention. Further, the number of infrared light receiving elements is not limited to one, but it is convenient that the light receiving direction can be expanded by connecting another light receiving element 16 in parallel with 11 and changing the mounting location and mounting angle of the element. The present invention differs from conventional similar means in that (a) an infrared light receiving source and an infrared light receiving element are used for signal transmission to eliminate the influence of indoor light sources;

(b) Since the operation of the infrared light receiving source is difficult to judge with the naked eye, by providing a visible light emitting source in series or parallel with the light emitting source, it is possible to visually monitor the operation of the key.

(c) Since no special directivity is assumed for light emission and light reception, there are few restrictions on the installation location of the electronic key body, and it is possible to control multiple transmitters at the same time.

[Effect of idea]

As described above, this invention can control the operation of the transmitter's electric key with a cordless electric key body, and the increase in parts and man-hours required for this purpose is small, so it has a great practical effect.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a cordless electric key system showing an embodiment of the present invention, Fig. 2 A and B are internal connection diagrams of the electric key body, and Fig. 3 is a connection diagram of the light receiving part on the transmitter side of the present invention. show. 1... Telephone key, 2... Telephone key contact, 3... Battery,
4, 5, 6, 12, 13...resistance, 11, 16...
...Photodetector, 14...Switching transistor, _D1 ...Infrared light emitting diode, _D2 ...Visible light emitting diode.

Claims (1)

[Scope of utility model registration request] In the wireless transmitter, a battery 3, a resistor 4, and an infrared light emitting diode are connected from one contact terminal of the electric key contact 2.
D ₁ , visible light emitting diode D ₂ , and other contact terminals of the key contact 2 are connected in series to the key 1 , and to the emitter-grounded switching transistor 14 whose collector is connected to the keying circuit of the wireless transmitter body 10 . A resistor 13 was connected between the emitter and the base, and an infrared light receiving element 11 and an infrared light receiving element 16 connected from the power source through the respective resistors were connected in parallel to the base of the switching transistor 14. A cordless electric key device comprising a wireless transmitter main body 10 provided with a switching circuit, and infrared light receiving elements 11 and 16 arranged so that the angle of incidence of light is wide.