JP3274776B2 - Service call system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a service call system for notifying a clerk of a call from a customer or a kitchen in a restaurant or a coffee shop.

[0002]

2. Description of the Related Art Conventionally, in a restaurant or a coffee shop, a transmitter is installed at each table or each room, and when a customer requests a service, a call switch composed of a push button switch provided on the transmitter is pressed. There is known a service call system in which a table number or a room number is displayed on a display unit of a receiver installed at a place where a clerk waits when the operation is performed. In addition, this type of service call system operates a transmitter installed in the kitchen to notify the clerk of the finished food or drink, informs the kitchen that the clerk has received the completed food or drink, It can also be used to notify other clerks that the requested service has been completed.

[0003] As a form of transmitting a signal from a transmitter to a receiver, there are a wired system and a wireless system.
In the case of installing about 100 transmitters, wiring is troublesome in a wired system, and a wireless system using radio waves or light as a transmission medium is expected to be promising. Also, in order to identify which transmitter has been operated by the receiver, the wireless system uses
As described in Japanese Patent Publication No. -20480, there is a type that uses a radio wave of a different frequency for each transmitter. However, when a large number of transmitters are used, it is inconvenient to use a different frequency for each of the transmitters because the occupied band is widened and the system is susceptible to external noise. It is desirable to identify the transmitter at the receiver by transmitting data.

By the way, since a battery is used as a power source of the transmitter, a battery provided in the transmitter is used so that transmission of a radio signal does not fail when the call switch is operated due to insufficient battery capacity. The replacement time is managed by the receiver.
For battery capacity management, each time the call switch on the transmitter is operated, battery capacity data indicating whether it is time to replace the battery is transmitted from the transmitter to the receiver. A configuration is considered in which the receiver stores the transmitter and reads out the stored transmitter to recognize the transmitter at the time of battery replacement by the receiver.

[0005] By the way, in the receiver, when a radio signal from the transmitter is received, an identification code (table number, room number, etc.) given to each transmitter is displayed on a display unit, and a battery of each transmitter is used. Can be selected in a maintenance mode for displaying whether or not it is time for replacement on a display unit. In order to switch between a normal operation mode and a maintenance mode, a mode switch such as a slide switch needs to be provided in the receiver.

[0006]

On the other hand, the receiver is often provided at a high place such as the upper part of the wall surface so that visibility is good, and there is a problem that operation of the mode changeover switch is troublesome. Therefore, it is conceivable to separate the maintenance device equipped with the mode changeover switch from the receiver and transmit the mode data corresponding to the operation of the mode changeover switch to the receiver. If a maintenance device that leads to a high cost and is used less frequently (at most several times a month) is provided separately from the receiver, there is a problem that the maintenance device is easily lost.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems. By using a normally used erasure transmitter as a maintenance device, it is possible to improve the operability while suppressing an increase in cost due to additional functions. Another object of the present invention is to provide a service call system in which the possibility of loss is prevented.

[0008]

According to the first aspect of the present invention, a radio signal including a battery as a power supply and different identification data and battery capacity data for notifying the replacement time of the battery is transmitted every time a call switch comprising a push button switch is operated. When a plurality of transmitters to be transmitted and a radio signal from each of the transmitters are received, an identification symbol in which a correspondence relationship with identification data is set in advance is provided on a display unit by a plurality of display windows provided for each transmitter. Either a receiver to be displayed on one of the receivers, and a plurality of erase switches respectively associated with the respective display windows of the receiver, and position data indicating the position of the display window in which the display of the identification symbol should be erased, and erasure of the identification symbol A service call system comprising: an erasure transmitter for transmitting a wireless signal including blinking data indicating the identification data; and a symbol storage unit storing identification data and identification symbols in association with each other. When a radio signal from the transmitter is received, the identification data included in the radio signal is checked against the symbol storage unit, and the corresponding identification symbol is extracted and displayed on the display unit. A display processing unit that erases the identification symbol displayed in the display window at the position corresponding to the position data included in the signal in response to an instruction to erase by flashing data, and a transmitter that is notified of the replacement time by the battery capacity data. The receiver is provided with a battery replacement storage unit for storing, and a battery exhaustion processing unit that operates in place of the display processing unit in response to an external instruction and displays the transmitter stored in the battery replacement storage unit on the display unit. A check switch for generating a radio signal for giving an operation instruction to the battery exhaustion processing unit at times is provided in the erasure transmitter.

According to a second aspect of the present invention, in the first aspect of the present invention, the operation section of one erase switch is also used as the operation section of the check switch, and this operation section is used as the operation section of the erase switch. A function changeover switch for selecting an operation mode and a maintenance mode as an operation section of the check switch is provided separately from the erase switch.

According to a third aspect of the present invention, in the first aspect of the present invention, the symbol storage section is rewritable, and a symbol generation section for generating identification symbols in a predetermined order according to an external signal; Operates on behalf of the display processing unit to display the identification symbol generated from the symbol storage unit on the display unit, and upon receiving a radio signal from the transmitter, generates identification data included in the radio signal from the symbol generation unit. A registration processing unit for generating an identification symbol in the next order by providing an external signal to the symbol generation unit after storing it in the symbol storage unit in association with the identification symbol being provided, and operating the registration processing unit during operation Is provided on the erasure transmitter.

According to a fourth aspect of the present invention, in the third aspect of the invention, in the erasure transmitter, the operation sections of the two erasure switches are also used as the operation sections of the check switch and the mode switch, respectively, and each operation section is operated by the erasure switch. A function switch for selecting a normal operation mode as an operation unit and a maintenance mode as an operation unit for a check switch and a mode switch is provided separately from the erase switch. When the maintenance mode is selected by the function switch, the erase switch is turned off. A function display unit for displaying a function name shared by the operation unit near the operation unit is provided.

[0012]

As described above, the check switch for instructing the battery exhaustion processing section provided in the receiver to operate in place of the display processing section is provided in the erasing transmitter, and the transmitter which has reached the battery replacement time is provided. When displaying on the receiver, the check switch of the erasure transmitter is operated, and the erasure transmitter is placed in a relatively low place for the operation of turning off the display of the receiver, so when replacing the battery The operation of displaying the reached transmitter is facilitated. In addition, since a maintenance device is not separately provided when operating the battery exhaustion processing unit, the maintenance device is also used as an erasure transmitter, so that an increase in cost due to additional functions can be suppressed, and the battery is used on a daily basis. By giving the erasure transmitter a function of a maintenance device, the possibility of the maintenance device being lost is reduced. Here, since the erasure transmitter is usually used fixed to a wall or the like, there is no possibility of loss in such a usage form.

A mode switch is provided on the erasure transmitter, and when the operation of the registration processing unit is instructed by the mode switch, a radio signal from the transmitter is received.
In the case where the set of the identification code generated from the symbol generation unit at that time and the identification data included in the radio signal is stored in the symbol storage unit, the next generation of the identification code is generated from the symbol generation unit. By operating the call switch of the transmitter to be associated with each identification symbol in the order of the identification symbols generated from the unit, the set of the identification data of each transmitter and the identification symbol generated from the symbol generation unit is obtained. Since they are sequentially stored in the symbol storage unit, by simply operating the call switch of the transmitter, the transmitter can be associated with the identification symbol, and the operation of associating the transmitter with the identification symbol becomes easier. At the same time, the size of the transmitter can be reduced.

Further, a function changeover switch is provided so that the eraser switch provided on the erasure transmitter can be used as a check switch and a mode changeover switch. When the maintenance mode is selected by the function changeover switch, the operation switch of each erasure switch is also used. When the erase switch is used as a switch for each function in the maintenance mode, it is easy to recognize which function in the maintenance mode corresponds to when the erase switch is used as a switch for each function in the maintenance mode. be able to.

[0015]

【Example】

(Embodiment 1) As shown in FIG. 1, a transmitter 1 includes a call switch 11 composed of a push button switch.
When the button 1 is pressed, an interrupt is input to the signal processing unit 10 composed of a microcomputer. Signal processing unit 10
Is connected to an identification data storage unit 12 composed of an EEPROM in which identification data for identifying the transmitter 1 is stored.
0 when an interrupt input is made to the identification data storage unit 12
The identification data is read from. The signal processing unit 10 generates transmission data having a predetermined format including the read identification data, and the wireless transmission unit 13 outputs a wireless signal modulated by the transmission data and causes the transmission antenna 14 to transmit the signal as a radio wave. The carrier used by the wireless transmission unit 13 is input from the PLL control unit 15. As the modulation method, the FSK modulation method is adopted, but ASK modulation, PWM
Any modulation method generally used for digital transmission, such as modulation, can be used. In addition, the signal processing unit 1 is provided to the transmitter 1 by pressing the call switch 11.
A notification / display unit 16 for sounding a piezoelectric buzzer or lighting a light emitting diode is also provided to notify that an interrupt input has been made to 0. Transmitter 1 is powered by battery 1
7. Here, the transmission data includes a start bit for synchronization, the identification data described above, blinking data for instructing whether to turn on or off the display of the receiver 2 described later, and a plurality of display windows provided in the receiver 2. Position data indicating which display window is to be turned off, battery capacity data notifying the replacement time by detecting the terminal voltage of the battery 17, mode data for switching the operation of the receiver 2 described later, and the like. Including. The identification data is written in the identification data storage unit 12 before shipment from the factory. As identification data, a serial number or the like is used so that different identification data is set for each transmitter 1. Further, the transmitter 1 transmits only a series of transmission data for one pressing operation of the call switch 11. That is, even if the call switch 11 is kept pressed, the wireless signal is not continuously transmitted, and a series of transmission data is transmitted even if the time for pressing the call switch 11 is short.

On the other hand, when the receiver 2 receives the radio signal from the transmitter 1 by the receiving antenna 21, the radio receiver 22 performs processing such as amplification and frequency conversion, demodulates it by the demodulator 23, and then demodulates it. The transmission data is extracted by shaping the waveform at 24. A local oscillation signal used for frequency conversion in the wireless receiving unit 22 is provided from the PLL control unit 25. The transmission data is input to the display processing unit 20a, and identification data and other data are extracted. The identification data extracted by the display processing unit 20a is collated with data stored in a symbol storage unit 26 composed of an EEPROM. Symbol storage unit 2
6 stores in advance an identification symbol associated with the identification data. When the display processing unit 20a finds, from the symbol storage unit 26, identification data that matches the identification data extracted from the transmission data, the display processing unit 20a responds to the identification data. The attached identification symbol is read out. put it here,
A number is generally used as the identification symbol, but an alphabetic character may be used, or a combination of an alphabetic character and a number may be used. Alternatively, a graphic can be used as the identification symbol.

The identification symbol read from the symbol storage unit 26 based on the identification data is displayed on the display unit 27. When the identification symbol is displayed on the display unit 27, a notification sound is generated from the notification unit 28 including a piezoelectric buzzer or the like. As shown in FIG. 2, the display unit 27 is configured to be able to display eight sets of two digits each using 16 segment type or dot matrix type displays 27a. That is, the display unit 27 is provided with eight display windows (not shown) capable of displaying eight sets of numbers. Each display 27a is driven by a display driver 27b inserted between the display 27a and the signal processor 20. In addition,
If it is a dot matrix type, 16 display units 2 are not necessarily required.
It is not necessary to use 7a, and it is sufficient to secure a display area large enough to display 16 numbers on one display 27a.

Incidentally, after turning on the display of the identification symbol in response to a service request from a customer, it is necessary to erase the display of the identification symbol when the service is completed. Display 27
A plurality of operation methods are provided for the operation of deleting the identification symbol displayed in. That is, a method of instructing to erase the display from the erasing transmitter 3 provided separately from the transmitter 1 installed in a table, a room, or the like. There is provided a method of giving an instruction to turn off the display of the identification symbol by pressing the button, and a method of automatically turning off the display after a certain period of time after the display is made by pressing the call switch 11 of the transmitter 1. It can be selected by the receiver 2.
Here, the display is turned on by the operation of the transmitter 1 and the erasure transmitter 3 is turned on.
In order to turn off the display by the operation described above, the transmission data includes blinking data and position data. In the following, the display unit 2
Only the case where the operation of deleting the display of the identification symbol in 7 is performed by the erasure transmitter 3 will be described. That is, the receiver 2
Has a function of deleting the display on the display unit 27 by a wireless signal. The display processing unit 20a extracts blinking data and position data from the wireless signal from the erasing transmitter 3, and designates the position data by the position data. The display window at the specified position is erased.

As described above, in order to receive the radio signal from the transmitter 1 at the receiver 2 and compare the identification data included in the transmission data with the identification data stored in the symbol storage unit 26,
A set of identification data and an identification symbol needs to be stored in the symbol storage unit 26 in advance. That is, the symbol storage unit 2
6 stores the identification data and the identification symbol in association with each other. Since the identification data can be generated by the transmitter 1, the receiver 2 is provided with a means for generating an identification symbol corresponding to the identification data. Just do it. Therefore, as shown in FIG. 1, the receiver 2 is provided with a symbol generator 20c for generating an identification symbol. Although the operation of the symbol generation unit 20c will be described later, basically, every time an identification symbol generated from the symbol generation unit 20c is stored in the symbol storage unit 26, the next identification symbol is generated in a predetermined order. Generate. Also, as can be associated with the identification data to identification symbol in a different order than the chronological order from the symbol generator 20c, the switch SW return feed switch SW ₂ for selecting the identification code generated by the symbol generator unit 20c ₃ is provided. The receiver 2 is provided with a registration processing unit 20b. When the operation of the registration processing unit 20b is enabled, every time a radio signal from the transmitter 1 is received, identification data is extracted from transmission data, This identification data is stored in the symbol storage unit 26 in association with the identification symbol generated from the symbol generation unit 20c.

Further, the receiving unit 2 has a battery dead processing unit 20d for managing the capacity of the battery 17 which is the power source of the transmitter 1.
And a battery replacement storage unit 29. The battery replacement storage unit 29 is composed of an EEPROM together with the symbol storage unit 26. When the battery capacity data from the transmitter 1 is extracted by the battery exhaustion processing unit 20d, the battery 1 whose battery 17 has reached the replacement time is identified. Data or an identification symbol corresponding to the identification data is stored. Here, the battery replacement storage unit 29 may be provided in the battery exhaustion processing unit 20d separately from the symbol storage unit 26, and a RAM instead of an EEPROM may be used. Battery exhaustion processing unit 2
0d is the battery exhaustion lamp Lb when the information of the transmitter 1 that has reached the time to replace the battery 17 is stored in the battery replacement storage unit 29.
Is turned on and the battery 17 has reached the replacement time.
That there is. Receiver 2 display change-over switch SW ₄ consisting of a push button switch is provided in, if pressing operation of the display change-over switch SW ₄ when the battery exhaustion lamp Lb is on, battery exhaustion processor 20d change the battery storage unit The data stored in the storage unit 29 is read out, and the identification code corresponding to the transmitter 1 stored in the battery replacement storage unit 29 is displayed on each display window of the display unit 27. Therefore, if the batteries 17 need to be replaced for a plurality of transmitters 1, a plurality of identification symbols are displayed on the display unit 27. Here, in the display window, numbers are displayed left-justified in ascending order of numerical values. When the number of transmitters 1 requiring replacement of the battery 17 is larger than the number of display windows, the scroll switch SW ₅ which is a push button switch is used.
By pressing, the display contents of the display window can be sequentially advanced. Further, when the press operation of clear switch SW ₆ is a push button switch after replacing the battery 17, battery exhaustion processor 20d change the battery storage section 29
Erase the contents of

As described above, in the receiver 2, every time a radio signal is received from the transmitter 1, the operation of the display processor 20a turns on or off the display of the identification symbol on the display unit 27. And a registration operation mode in which the registration processing unit 20b operates the registration processing unit 20b to associate the identification data with the identification data and store the identification data in the symbol storage unit 26 each time a wireless signal is received from the transmitter 1. In addition, there is a dead battery display mode in which an identification symbol corresponding to the transmitter 1 at which the battery 17 has been replaced is displayed on the display unit 27 by the operation of the dead battery processing unit 20d. Therefore, in order to switch between a normal operation mode in which the display is turned on or off by a radio signal from the transmitter 1 and a registration operation mode in which registration in the symbol storage unit 26 is performed, the display processing unit 20a and the registration processing unit 20b processing changeover switch SW ₁ to selectively enable operation of the provided. Further, in order to switch between the normal operation mode and the battery exhaustion display mode for displaying the contents of the battery replacement storage unit 29, the operation of the display processing unit 20a and the battery exhaustion processing unit 20d is alternatively enabled. display changeover switch SW ₄ that are provided. Processing switch S
W ₁ , feed switch SW ₂ , return switch SW ₃ , display changeover switch SW ₄ , scroll switch SW ₅ , and clear switch SW ₆ are push button switches, respectively, and are depressed by the processing changeover switch SW ₁ and the display changeover switch SW _4. The operation mode is switched every time. The feed switch SW ₂ and the return switch SW ₃ is continuously forward in the case of the identification code generated by the symbol generator unit 20c for each pressing operation in a predetermined order to return forward or reverse, press and hold a predetermined time or more Or it is designed to reverse. Display processing unit 20a and registration processing unit 20 described above
b, the symbol generation unit 20c, and the battery exhaustion processing unit 20d are configured by the microcomputer 20.

The receiver 2 has a case fixed to a wall or the like. Eight display windows each including two display units 27a are provided on the front surface of the case, four in each of upper and lower two stages, 8
Individual identification symbols can be displayed. The processing changeover switch SW _1, feed switch SW _2, the return switches S
W ₃ , display changeover switch SW ₄ , scroll switch S
The operation unit of W ₅ and the clear switch SW ₆ is disposed adjacent to the display unit 27 on the front surface of the case of the receiver 2.

Hereinafter, the operation of the receiver 2 will be described in detail.
Now, it is assumed that the simplest identification symbol is assigned to the transmitter 1, and a number from "1" to "8" is used as the identification symbol. That is, the symbol generation unit 20c generates a numerical value having a larger value in order from “1”. After installing the transmitter 1 and the receiver 2 Power on receiver 2, enabling the operation of the registration processing section 20b by the processing changeover switch SW _1, identification mark being generated from the symbol generator 20c is The identification symbol blinks in the upper left display window. Since the symbol generator 20c initially generates "1", "1" blinks in the upper left display window at this time. At this time, the call switch 11 of the transmitter 1 is pressed and the receiver 2 receives the radio signal from the transmitter 1,
An identification symbol “1” is associated with the identification data of the transmitter 1 for which the call switch 11 has been pressed, and the symbol storage unit 2
6 is stored. When the storage of the identification symbol in the symbol storage unit 26 is completed, an external signal is given from the registration processing unit 20b to the symbol generation unit 20c, and the symbol generation unit 20c generates the next identification symbol “2”. , "2" are blinkingly displayed in the upper left display window as identification symbols. That is,
When the operation of the registration processing unit 20b is valid, a number always flashes in the upper left display window. When the call switch 11 of each of the transmitters 1 is pressed while the number is blinking in the display window at the upper left end, the call switch 1
The number blinking on the receiver 2 at the time of operation 1 is registered in the symbol storage unit 26 as an identification symbol corresponding to the transmitter 1. Thus, the symbol generator 20
Since c is generated sequentially by numbers, for example, if the call switch 11 of the transmitter 1 is pressed in the order of the table number,
The table number can be associated with the identification symbol.

[0024] As described above, the switch SW ₂ and the return switch SW ₃ feed is provided in the receiver 2. When the feed switch SW ₂ is pressed, the number blinking in the upper left display window at that time increases by one, and when the return switch SW ₃ is pressed, the display blinks in the upper left display window. An external signal is generated from the registration processing unit 20c so that the number present becomes one smaller value. The maximum and minimum values are defined for the numbers that can be generated from the symbol generation unit 20c, for example, “0”.
A number is displayed in the range of ~ 99.

The forward switch SW ₂ and the return switch SW ₃
By using the above, it is possible to skip the numbers to be assigned to the respective transmitters 1 or to assign the desired appropriate numbers to the transmitters 1. That is, the switch SW ₂ and the return switch S sends the numbers are blinking in the upper left edge of the display window
Change in W _3, a call switch 11 transmitter 1 may be press operated with desired number is displayed blinking. After the call switch 11 of one of the transmitters 1 is pressed to associate a number with the transmitter 1, the return switch SW
Pressing ₃ causes the original number to blink in the upper left display window, and then pressing the call switch 11 of the other transmitter 1 in this state will cause the same number to be displayed on the two transmitters 1 Can be assigned as That is, since both transmitters 1 are treated equally by the receiver 2, when two transmitters 1 are arranged in one room, such registration is performed. Needless to say, the same number may be assigned to three or more transmitters 1 if necessary. In the symbol storage unit 26, more transmitters 1 than the number of display windows 31 can be registered. For example, up to 20 transmitters 1 can be registered.

By repeating the above operation, identification data and identification symbols can be registered in the symbol storage unit 26 of the receiver 2 in association with each other. in this way,
The identification data of the transmitter 1 is given at the time of shipment from the factory, an identification symbol corresponding to the transmitter 1 is registered in the receiver 2 when the transmitter 1 is installed, and the symbol assigned to the transmitter 1 is the receiver 2. Since it is automatically generated, the identification data and the identification symbol can be associated with each other by a simple operation of merely pressing the call switch 11 of the transmitter 1 in order, thereby facilitating the installation operation.

After the registration of the set of the identification data and the identification symbol in the symbol storage unit 26 is completed, the processing changeover switch SW ₁
When the operation of the display processing unit 20a is enabled, the blinking display of the upper left display window disappears. That is, either the display processing unit 20a by the processing changeover switch SW ₁ and the registration processing unit 20b is enabled, whether the number in the upper left edge of the display window is displayed blinking, depending on whether other display state Can be identified. If the operation of the display processing unit 20a becomes effective, the transmitter 1
Each time a wireless signal is received from the transmitter 1, the identification symbol associated with the identification data of the transmitter 1 is read from the symbol storage unit 26 and displayed on the display unit 27. Eight display windows have a symbol generation unit 20
The identification symbols are displayed left-justified in the order of occurrence of the identification symbols from c. For example, when a radio signal is received from the transmitter 1 corresponding to the identification symbol "3", "8", or "2" in the above order, "3" is displayed in the upper left display window when the first radio signal is received. Display, and "3" by receiving the next wireless signal,
"8" is displayed, and by receiving the third wireless signal, the numbers are rearranged in the order of "2", "3", and "8", and the numbers are displayed in the three display windows on the upper left side. Here, the display processing unit 20a is provided with a latch circuit for holding the identification code being displayed.

Next, the erasure transmitter 3 will be described. As shown in FIG. 1, the circuit configuration of the erasure transmitter 3 is basically the same as that of the transmitter 1, and the call switch 1 of the transmitter 1 is used.
1. Erase switches SWa to SWh including a plurality of pushbutton switches instead of 1 and maintenance switches Sa to SW
Sd. In the signal processing unit 30, the erase switch S
It generates position data corresponding to Wa to SWh and generates blinking data for turning off the display on the display unit 27 of the receiver 2. The identification data storage section 32 is composed of an EEPROM, and identification data indicating that the erasure transmitter 3 is registered. Also, a wireless transmission unit 33 that modulates the transmission data created by the signal processing unit 30 and sends it out as a wireless signal, a transmission antenna 34 that sends out a wireless signal to space, a PLL control unit 35 that generates a carrier wave, and erase switches SWa to SWa. A notification / display unit 36 for displaying the functions of the switches SWh and the switches Sa to Sd and notifying the operation is provided.

As shown in FIG. 3, eight erase switches SWa to SWh are provided and arranged in the same number as the display windows of the receiver 2. Further, each of the erase switches SWa to SWh
Is associated one-to-one with the display window of the receiver 2 by the position data. That is, by pressing each of the erasure switches SWa to SWh of the erasure transmitter 3, position data for instructing to erase the number displayed in the display window at the position corresponding to the erasure switches SWa to SWh, and blinking. The data is transmitted to the receiver 2 as transmission data.
The display processing unit 20a of the receiver 2 turns off the display of the display window at the position indicated by the position data when the blinking data of the transmission data of the received wireless signal is an instruction to turn off the display. . Here, when the numbers are erased in a state where the numbers are displayed on the plurality of display windows, the numbers are displayed by filling the display windows where the numbers disappear.

The switches Sa to Sd of the erasure transmitter 3 correspond to the processing switch SW ₁ , the feed switch SW ₂ , the return switch SW ₃ , and the display switch SW ₄ in the receiver 2, respectively. For example, mode data instructing to operate the registration processing unit 20b of the receiver 2 is transmitted, and the receiver 2 operates in the registration operation mode. That is, the switch Sa functions as a mode switch, and in this state, only the switches Sb and Sc are enabled. If the switch Sb is pressed here, the receiver 2
The next symbol is generated from the symbol generation unit 20c, and the preceding symbol can be generated by operating the switch Sc. That is, the switch Sb functions similarly to switch SW ₂ feed, switch Sc functions similarly to the return switch SW _3. On the other hand, when the switch Sd is pressed, mode data instructing to operate the battery exhaustion processing unit 20d of the receiver 2 is transmitted, and the contents of the battery replacement storage unit 29 are displayed. That is, the switch Sd functions as a check switch. However, when the switch Sd is operated, the contents of the battery replacement storage unit 29 are displayed for a fixed time (for example, 5 seconds), and thereafter, return to the normal operation mode. The thus treated changeover switch SW _1, feed switch SW _2, the return switch SW _3, the display changeover switch SW
_By providing switches Sa to Sd having the same function as ₄ in the erasure transmitter 3, the operation is easier than in the case where the receiver 2 arranged at a relatively high place is operated in order to enhance the visibility. It becomes. The switch corresponding to the scroll switch SW ₅ and clear switch SW ₆ is not provided in the erase oscillator 1 may be provided if necessary.

Also, a large number of transmitters 1 are installed,
If eight display windows are not enough, the receiver 2
May be used. For example, when two receivers 2 are used, the symbol receiver 2 is used in the second receiver 2.
To forward with the switch SW ₂ sends an identification mark generated from 0c, if to set the identification mark with different ranges 2 and first unit of the receiver, a number table using receiver 2 of the same configuration Can be used.

(Embodiment 2) In this embodiment, a part of the erase switches SWa to SWh provided in the erase
a to Sd, and as shown in FIG. 4, eight erase switches SWa to SWh
And a function changeover switch SS composed of a slide switch for switching functions so that some of the erase switches SWd and SWf to SWh are used as the switches Sa to Sd. That is, the function changeover switch SS switches between an erase mode in which the erase switches SWa to SWh are used as they are, and a maintenance mode in which the functions of the switches Sa to Sd are used. In the maintenance mode, only the erase switches SWd and SWf to SWh are enabled,
The erase switch SWd is pressed to replace the battery 17 which is to be replaced.
Has a function corresponding to the switch Sd for displaying the identification symbol of the transmitter 1 having
Wh has a function corresponding to each of the switches Sa to Sc. Other configurations and operations are the same as those of the first embodiment.

(Embodiment 3) In the present embodiment, in addition to the configuration of the second embodiment, displays indicating functions near the erase switches SWd, SWf to SWh which are enabled in the maintenance mode are displayed on the function display sections 36a to 36d. Is provided. The function display sections 36a to 36d are provided in the notification / display section 36. When the maintenance mode is selected by operating the function changeover switch SS, each of the erase switches SW
d, Function names assigned to SWf to SWh are displayed. Actually, the characters of the function names described as the function display portions 36a to 36d are made to have translucency, and when the maintenance mode is selected, the backlight arranged behind the characters is turned on. In the erase mode, the backlight is turned off. Other configurations are the same as those of the second embodiment.

[0034]

According to the invention of each claim, a check switch for instructing to operate the battery exhaustion processing unit provided in the receiver instead of the display processing unit is provided in the erasure transmitter, and when the battery replacement time is reached. When displaying the transmitter on the receiver, the check switch of the erasure transmitter is operated.Since the erasure transmitter is placed at a relatively low place for the operation of turning off the display of the receiver, the battery is not charged. There is an advantage that the operation of displaying the transmitter that has reached the replacement time becomes easy. In addition, since a maintenance device is not separately provided when operating the battery exhaustion processing unit, the maintenance device is also used as an erasure transmitter, so that an increase in cost due to additional functions can be suppressed, and the battery is used on a daily basis. By providing the erasure transmitter with the function of the maintenance device, there is an advantage that the possibility of the maintenance device being lost is reduced.

A mode switch is provided in the erasure transmitter, and when the operation of the registration processing unit is instructed by the mode switch, a radio signal from the transmitter is received.
In the case where the set of the identification code generated from the symbol generation unit at that time and the identification data included in the radio signal is stored in the symbol storage unit, the next generation of the identification code is generated from the symbol generation unit. By operating the call switch of the transmitter to be associated with each identification symbol in the order of the identification symbols generated from the unit, the set of the identification data of each transmitter and the identification symbol generated from the symbol generation unit is obtained. Since they are sequentially stored in the symbol storage unit, by simply operating the call switch of the transmitter, the transmitter can be associated with the identification symbol, and the operation of associating the transmitter with the identification symbol becomes easier. In addition, there is an advantage that the transmitter can be downsized.

Further, a function changeover switch is provided so that the eraser switch provided in the eraser transmitter can be used as a check switch and a mode changeover switch. When the maintenance mode is selected by the function changeover switch, the operation switch of each eraser switch is also used. With the function display unit that displays the name of the function to be performed near each operation unit, when the erase switch is used as a switch for each function in the maintenance mode, it is easy to recognize which function in the maintenance mode corresponds This has the effect.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a first embodiment;

FIG. 2 is a block diagram illustrating a main part of a receiver used in the first embodiment.

FIG. 3 is a front view showing an erasure transmitter used in the first embodiment.

FIG. 4 is a front view showing an erasure transmitter used in a second embodiment.

FIG. 5 is a front view showing an erasure transmitter used in a third embodiment.

[Explanation of symbols]

Reference Signs List 1 transmitter 2 receiver 3 erase transmitter 11 call switch 27 display unit 20a display processing unit 20b registration processing unit 20c symbol generation unit 20d battery exhaustion processing unit 26 symbol storage unit 29 battery exchange storage unit 36a function display unit 36b function display unit 36c function display unit 36d function display unit Sa~Sd switch SW ₁ processing changeover switch SW ₂ feed switch SW ₃ return switch SW ₄ display changeover switch SWa~SWh erase switch SS function change-over switch

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiji Murao 1048 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. Inventor Toshiaki Tanaka 1048 Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Works, Ltd. (56) Reference JP-A-1-166297 (JP, A) JP-A-2-171899 (JP, A) JP-A 8-110988 (JP, A) Actually open 49-96890 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08B 23/00 530 G08B 5/22 G08B 25/10 H02J 7/00

Claims (4)

(57) [Claims] 1. A plurality of transmitters for transmitting a radio signal including a battery as a power supply and including identification data different from each other and battery capacity data for notifying a replacement time of a battery every time a call switch including a push button switch is operated, A receiver for displaying, on a display unit, one of a plurality of display windows provided on a display unit with an identification symbol in which a correspondence relationship with identification data is set in advance when a radio signal from the device is received; A plurality of erase switches respectively associated with the display windows are provided, and a wireless signal including position data indicating the position of the display window in which the display of the identification symbol should be erased and blinking data instructing the erasure of the identification symbol is transmitted. In a service call system including an erasure transmitter, a symbol storage unit storing identification data and an identification symbol in association with each other, and receiving a radio signal from the transmitter. The identification data included in the radio signal is collated with the symbol storage unit, the corresponding identification symbol is extracted and displayed on the display unit, and when a radio signal from the erasing transmitter is received, the identification data corresponding to the position data included in the radio signal is received. A display processing unit for erasing the identification symbol displayed on the position display window in response to an instruction for erasure by blinking data, a battery replacement storage unit for storing a transmitter whose replacement time is notified by battery capacity data, and an external A battery exhaustion processing unit that operates on behalf of the display processing unit in response to an instruction from and displays the transmitter stored in the battery replacement storage unit on the display unit, and instructs the battery exhaustion processing unit to operate during operation. A service call system comprising a check switch for generating a radio signal for providing an erasure signal to an erasure transmitter. 2. An erasure transmitter, wherein an operation section of one erasure switch is also used as an operation section of a check switch, and a normal operation mode in which this operation section is an operation section of the erasure switch and a maintenance mode in which an operation section of the check switch is operated. 2. The service call system according to claim 1, wherein a function changeover switch for selecting the service call is provided separately from the erase switch. 3. The symbol storage unit is rewritable, and operates in place of a display processing unit in response to an external signal and generates a discrimination symbol in a predetermined order according to an external signal. In addition to displaying on the display unit the identification symbol generated from the display unit, and upon receiving a radio signal from the transmitter, the identification data included in the radio signal is associated with the identification symbol generated from the symbol generation unit and stored in the symbol storage unit. A registration processing section for providing an external signal to the symbol generation section after generating the identification signal and generating a next identification symbol in the receiver, and a mode changeover switch for generating a radio signal for giving an operation instruction to the registration processing section at the time of operation The service call system according to claim 1, wherein the service call system is provided in the erasure transmitter. 4. A normal operation mode, a check switch, and a mode, in which an operation section of two erase switches is also used as an operation section of a check switch and a mode changeover switch, respectively, and each operation section is operated as an operation section of an erase switch. A function changeover switch for selecting the maintenance mode, which is the operation part of the changeover switch, is provided separately from the eraser switch. When the maintenance mode is selected by the function changeover switch, the function name shared by the operation part of the eraser switch near the operation part 4. The service call system according to claim 3, further comprising a function display unit for displaying the service call.