JPS6230354Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a working/standby switching device for setting working and standby for a wireless telephone device having two transmitting/receiving devices.

As is well known, in order to increase the line reliability of radio telephone equipment, a configuration is adopted in which a transmitting/receiving device is provided with a working unit and a standby unit, and in the event of a failure of the working unit, the system automatically switches to the standby unit.

Conventionally, the transmitter/receiver consists of a signal generating section that is installed in each of the transmitting and receiving devices and generates a failure signal in the event of a failure, and a control section that controls the other device to become the active device when it senses a failure status display signal from the active device. When a failure status display signal is detected from the current device, the other non-faulty device is selected as the current device to improve line reliability.

An example of its configuration is as shown in the block diagram shown in FIG.
The output Q of the flip-flop integrated circuit 11 is set by sending out a pulse from the power-on reset circuit 12 which generates a pulse when the power is turned on to CL of the FF circuit (FF circuit) 11.

This Q output is an operating signal 1 for the transmitting/receiving device 1.
3, and the output is sent to the transmitting/receiving device 2 as an operation signal 14. Since each signal is controlled by the FF circuit, both signals are not sent out at the same time.

In the example of FIG. 1, the initial setting is that when the power is turned on, the power-on reset circuit 12 generates a pulse and sends it to the CL of the FF circuit, thereby making the transmitter/receiver 1 the active device and the transmitter/receiver 2 as the active device. It becomes a backup device.

As this active/backup switching means, the transmitting/receiving device 1 sends out a failure signal using the failure state display signal 4, the pulse generation circuit 6 generates a pulse, passes through the OR gate 10, and inputs the signal to the integrated circuit 11.
Either a pulse is applied to CP, or a failure signal is sent from the transmitting/receiving device 2 using the failure status display signal 5, a pulse is generated in the pulse generating circuit 7, and a pulse is applied to the input CP of the integrated circuit 11 through the OR gate 10. , the wireless telephone device operator presses the non-lock switch 9 to generate a pulse in the pulse generating circuit 8, which is input to the integrated circuit 11 through the OR gate 10.
This is done by inverting the output Q, of the integrated circuit 11, either by applying a pulse to CP.

As mentioned above, when a malfunction occurs in the conventional device and the radio telephone device operator removes the transmitter/receiver device 1 or 2, when the power is turned on again, the control unit There are drawbacks to setting up backup equipment.

As mentioned above, in order to solve the drawback that the active device and standby device are set when the power is turned on regardless of the presence or absence of the device, the present invention sends a mounting status display signal from each device to ensure that the device is mounted on the side where the device is mounted. The purpose of the present invention is to provide an automatic switching device for wireless telephones that is set as the active device.

According to the present invention, when a wireless telephone device has two removable transmitting/receiving devices, one in use and one in reserve, a device is provided for each of them to generate a signal indicating whether the transmitting/receiving device is installed.

In the embodiment, the mounted state is indicated by "L" and the non-mounted state is indicated by "H". When mounted, the mounted state display signal is connected to ground, and when not mounted, it is not connected to ground and is "H". “It becomes a signal.

When the two transmitting/receiving devices are shown to be in the mounted state by the mounting state display signal,
It does not matter which device is the active device or which is the backup device.

However, if a signal indicating a non-mounted state is sent, the device that sent the signal becomes the backup device and the other device is set as the active device.

In this case, it does not matter which device is the active device or the backup device before the signal is generated.

Since reliable operation is required for the control device, it is better to use a flip-flop to switch between the active and standby devices.

As a conventional control method in combination with a fault signal, when two transmitting/receiving devices are both installed, a fault signal from one of the transmitting/receiving devices is used to switch between active and standby.

In other words, if one of them is not implemented, there is no other choice but to use the other one, and there is no need to refer to the failure signal, and if it is referenced again, a problem will occur.

As before, a non-lock switch 9 for manual switching between active and standby is provided for the failure status display signal and OR.
is provided, and the switch can also be used for switching.

When a non-implemented signal is being output, the installed side should become the active one, so switching between active and backup at this time will cause a problem, so if a non-implemented signal is being sent from one side, is configured to ignore failure signals and the state of manual non-lock switches.

If the control device is configured as shown in FIG. 2 using a D type flip-flop as shown in the embodiment, the above operation can be performed.

With the above configuration, in a wireless telephone device having two transmitting/receiving devices, by using a mounting status display signal indicating whether or not the two transmitting/receiving devices are mounted, it is possible to always know the side on which the device is mounted. It can be used as a current device and has no “connection” to the power supply.
It is also possible to eliminate the problem of setting a device on which no device is installed due to "disconnection" or the like as the current device.

The embodiment shown in FIG. 2 will be explained below.

The initial settings and the operation of the failure state display signal are the same as in the prior art, so their explanation will be omitted.

In this active/standby automatic switching device, the means for changing the operating signal is either by the radio telephone device operator operating the non-lock switch 9, or by sending out a fault signal from the transmitting/receiving device 1 or by sending a fault signal from the transmitting/receiving device 2. Or, when the mounting status display signals 16 and 17 employed in the present invention are output as a non-mounting signal from the side that is the active device, the output Q of the flip-flop integrated circuit changes, causing each device to operate. Sent as a signal to set up active/standby equipment.

To explain the case where the transmitter/receiver 1 is not mounted, the mounting state display signal 16 becomes a non-mounted signal,
An "H" level is applied to the PR of the flip-flop integrated circuit 11, the output becomes an "L" level, and the operating signal 14 is sent out, so that the transmitting/receiving device 2 becomes the active device.

Furthermore, even if there is a failure signal or the radio telephone operator operates the non-lock switch 9 at this time, the output signal of the flip-flop integrated circuit does not change.

Next, when the transmitting/receiving device 1 is mounted and the transmitting/receiving device 2 is not mounted, the mounting status display signal 17 becomes a non-mounted signal, passes through the OR gate 15, and is applied to CL of the flip-flop integrated circuit 11 at an “H” level. The output Q becomes "L" level, the operation signal 13 is sent out, and the transmitting/receiving device 1 becomes the active device.
Similarly to when the transmitting/receiving device 1 is not mounted, the transmitting/receiving device 1 can be fixed to the current device by the operation of the failure handler or by turning the power on or off.

This is because the mounting state display signal is controlled with priority given to the failure state display signal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a conventional working/standby automatic switching device, and FIG. 2 is a block diagram showing an embodiment of the working/standby automatic switching device of the present invention. 1, 2... Transmitting/receiving device, 3... Control unit, 4, 5
...Failure status display signal, 6, 7, 8...Pulse generation circuit, 9...Working/standby manual switching non-lock switch, 10...OR gate, 11...Flip-flop integrated circuit, 12...Power-on reset circuit, 13 , 14...operation signal, 15...OR gate, 16, 17...mounting state display signal.

Claims (1)

[Claims for Utility Model Registration] (1) First and second transmitting/receiving devices each having a signal generating device that generates a mounting status indicating signal, and a mounting status indicating signal supplied from one of these transmitting/receiving devices. 1. A current/standby automatic switching device for a wireless telephone device, comprising: a control unit that controls one device to become a standby device and the other device to become a working device when the device is in a non-mounted state. (2) The control unit is configured to switch between the active device and the standby device by supplying a failure signal when both the mounting state display signals supplied from the first transmitting/receiving device and the second transmitting/receiving device indicate the mounting state. 1. An automatic switching device for active and standby wireless telephone equipment as set forth in claim (1) of the utility model registration, characterized in that the device switches between active and backup devices. (3) The automatic switching device for active and standby wireless telephone equipment according to claim 1 or 2, wherein the control unit includes a D-type flip-flop. .