JPS62161225A - Radiotelephony equipment - Google Patents

Abstract

PURPOSE:To prevent the occupancy of a radio channel by providing a means switching the state of a radiotelephony equipment from the reception to the transmission state or from the transmission state to the reception state through the on-operation of a press switch and holding the state after switching even when the press switch is turned off on its way. CONSTITUTION:A signal S2 of H level for a short time is outputted from a reset circuit 4, a signal S4 at an output terminal Q goes to L, a radio section 6 is in the reception state, a signal S1 at an output terminal Q goes to H and is set to a data terminal D. In turning on the press switch 1 in this state, a signal S3 goes from H to L, the signal S4 at the output terminal Q goes from L to H and the radio section 6 is in the transmission state. The transmission state of the radio section 6 is kept even when the press switch 1 is turned off, and when the press switch 1 turned from OFF to ON, the signal S1 at L level at the output terminal Q is sent to the output terminal Q by the signal S4 at L level and the radio section 6 is switched into the reception state. Thus, the undesired occupancy over a long time of the radio channel is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a simplex wireless telephone device equipped with a transmission/reception switching means.

[Conventional technology]

This type of radiotelephone device is equipped with a press switch, and is designed so that when the button of the press switch is pressed, it is in the transmitting state, and when said press switch is released, it is in the receiving state. A press switch with a locking mechanism was used to maintain the transmitting state.

[Problem that the invention seeks to solve]

The conventional wireless telephone device described above uses a press switch with a locking mechanism to maintain the transmitting state.
Mechanical failures are likely to occur in the components that make up the switch, and if a message is sent by mistake and the user does not notice it, it will continue to transmit for a long time, occupying the wireless line. There was a drawback.

[Means for solving problems]

The present invention provides a simplex type radio telephone device that transmits and receives data using a press switch, which switches the state of the radio telephone device from a receiving state to a transmitting state or from a transmitting state to a receiving state by turning on the press switch, A radio telephone device is characterized in that it has means for maintaining the state after switching off even if the press switch is turned off midway, and the present invention further provides a simplex wireless telephone device that transmits and receives data using a press switch. In a telephone device, the state of the wireless telephone device is switched from a receiving state to a transmitting state or from a transmitting state to a receiving state by turning on the press switch, and even if the press switch is turned off in the middle, the state after the switching is not changed. and timer means for monitoring the transmission state of the wireless telephone device and sending a signal to the means to cancel the transmission state when a preset arbitrarily set continuous transmission possible time is reached. This is a wireless telephone device characterized by having the following features.

〔Example〕

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram of an embodiment according to the present invention, and the flip-flop 3 in the figure is a D flip-flop that operates as shown in FIG. 2 at the falling edge of the signal S3 input to the clock terminal CK.

In other words, the input signal S3 to the clock terminal CK is
When changing from a "high level" (hereinafter referred to as "H") to a "low level" (hereinafter referred to as "L"), the signal S1 that has been input to the data terminal of the flip-flop 3 just before this is changed to the output terminal Q. It is output as signal S4.

Note that the data terminals of the flip-flop 3 are connected to each other and the inverted output terminals, and the output terminal Q is connected to the wireless section 6. Furthermore, when the "H" signal S2 is input to the reset terminal R of the flip-flop 3, the output terminal Q outputs the "L" signal S4 regardless of the states of the other input terminals.

A power source B is connected to the clock terminal CK of the flip-flop 3 via a resistor 2 and is also grounded via a press switch 1.

The reset circuit 4 outputs a short-time H'' signal S2 to the reset terminal R of the flip-flop 3 when the power is turned on.The display 5 is connected to the output terminal Q of the flip-flop 3, and the wireless section 6 Displays the sending or receiving status of the

Note that the radio section 6 includes an antenna 8, a transmitting/receiving section, and a connecting section 7.
are connected to each other.

The operation of the embodiment shown in FIG. 1 will now be explained based on time chart 1 of FIG. 2.

First, when press switch 1 is on, the clock terminal CK
When the signal S3 is “L”, it is “H” when it is off! -r
s3 is input.

The radio section 6 receives the signal S of the output terminal Q of the Furi, Pflo, and Puflo.
4 becomes "H", it enters the transmitting state, and when it becomes "L", it enters the receiving state.

The display 5 is, for example, the output terminal Q of the flip-flop 3.
When the signal S4 becomes "H", it lights up to indicate that the wireless section 6 is in the transmitting state.

Now, when the power supply unit (not shown) of the wireless telephone device shown in FIG.
is output, the signal S4 at the output terminal Q becomes "L",
The radio unit 6 enters the receiving state, and the signal S1 between the output terminals becomes “
The signal becomes "H" and is sent to the data terminal.

When press switch 1 is turned on in this state, signal S3 changes from "H" to "L" and signal S4 of output terminal Q becomes "
The signal changes from "L" to "H" and the wireless section 6 enters the transmitting state.

This transmitting state of the radio section 6 is maintained even when the press switch 1 is turned off, and when the press switch 1 is turned on from off, that is, when changing from "H" to "L", the " The "L" signal Sl is sent to the output terminal Q as the "L" signal S4, and the Vj-free section 6 is switched to the receiving state.

In other words, each time the press switch 1 is turned on from off, the wireless unit 6 is alternately switched from the transmitting state to the receiving state and from the receiving state to the transmitting state. Even if 1 is turned from on to off, each state will be maintained.

Therefore, the flip-flop 3 can be said to be a means for switching the transmission/reception state and maintaining the state after switching.

FIG. 3 is a diagram showing a second embodiment of the present invention, which is an improved version of the embodiment shown in FIG. belongs to.

In the timer circuit 10, the signal S4 from the output terminal Q is “H”.
'', that is, it is activated when the transmitting state is entered, and when the time set by the timer set 11 has elapsed, a short-term "H" signal S5 is sent out.
When the signal S4 becomes "L" midway through, the tie-boo circuit 1O is reset and returns the timer to O.

The OR circuit 9 logically ORs the signal S2 of the reset circuit 4 and the signal S5 of the timer circuit IO, and sends the signal S6 to the reset terminal R of the flip-flop 3.

Therefore, in the embodiment shown in FIG. 3, when the continuous transmission time of the radio unit 6 reaches the set continuous transmission possible time, the flip-flop 3 The state will automatically be switched to the receiving state.

In addition, timer cella) 11. The timer circuit 1O and the OR circuit 9 monitor the transmission state of the radio section 6, and when a preset arbitrarily set continuous transmission possible time is reached, a reset signal S6 is sent to the flip-flop 3 to reset the radio section. 6
It constitutes a timer means for switching to a receiving state.

〔Effect of the invention〕

As explained above, according to the present invention, by electrically maintaining the transmitting state in a simplex wireless telephone device, mechanical failures can be reduced, and furthermore, the transmitting state can be maintained by electrical means. Since this is done electrically, in combination with a timer, it is easy to automatically cancel the transmission state at an arbitrarily set time, which has the effect of preventing unnecessary occupation of the radio line for a long time.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a block diagram showing an embodiment according to the present invention, and FIG.
The figure is a time chart explaining the same operation as above, and the third
The figure is a pronk diagram showing another embodiment according to the present invention. l nibless switch, 3: flip-flop 4: reset circuit, 6: radio section, 9: OR circuit, 10: timer circuit.

Claims (1)

[Scope of Claims] 1) In a simplex wireless telephone device that transmits and receives data using a press switch, the state of the wireless telephone device is changed from a receiving state to a transmitting state or from a transmitting state by turning on the press switch. 1. A radio telephone apparatus, comprising means for switching to a reception state and maintaining the state after switching even if the press switch is turned off in the middle. 2) In a simplex wireless telephone device that transmits and receives using a press switch, the state of the wireless telephone device is switched from a receiving state to a transmitting state, or from a transmitting state to a receiving state by turning on the press switch, and means for maintaining the state after the switch is turned off even when the press switch is turned off; 1. A radio telephone device comprising: timer means for transmitting a signal for canceling a transmission state.