JPH11315681A - Electric shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric shutter capable of obliging exchange of batteries when the battery of a radio transmitter for controlling a shutter is dead. SOLUTION: A rise button is pressed by a finger and a rise switch is turned on to perform the rise operation from a radio transmitter (A). First, a battery voltage is detected at S11, the operation advances to S12 and then is shifted to S13 if a battery voltage is above a predetermined voltage to transmit a rise signal. When the battery voltage is reduced below the predetermined voltage and a battery is dead at S12, the operation is shifted to S14 to light an indicator lamp. At S15, a rise signal is transmitted, and this rise signal includes the data showing the death of the battery. In a receive part receiving this signal, normal rise operation is done when the battery is not dead, but the pressing and cutting operation is done when it receives a signal indicating the death of the battery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shutter capable of performing an ascending and descending operation wirelessly.

[0002]

2. Description of the Related Art Conventionally, a remote-controlled portable transmitter using infrared rays or radio waves has been used to operate an electric shutter. FIG. 7 is a configuration diagram of an example of a remote-controlled electric shutter using radio waves. In the figure, 4
1 is a shutter slat, 42 is a switchgear, 43 is a switchgear control panel, 44 is an obstacle sensing receiver, 45 is a wireless receiver,
46 is an obstacle sensing unit, 47 is an obstacle sensing signal transmitting unit, 4
Reference numeral 8 denotes an obstacle sensing signal receiving unit, 49 denotes an antenna, 50 denotes a push button switch, and 51 and 52 denote portable wireless transmitters.

[0003] A shutter slat 41 is installed at an opening of a building or the like, and is raised and lowered by a switch 42 provided with a drive motor. The switch 42 is controlled by a switch control panel 43.
4. The signal is given to the switchgear control panel 43 from the wireless receiver 45 and the push button switch 50.

[0004] The obstacle sensing receiver 44 is provided when the descending shutter slat 41 contacts an obstacle, that is,
When there is an obstacle such as luggage or a person between the seat plate of the shutter slat 41 and the floor surface, the obstacle sensing unit 46 provided on the seat plate or the like senses the force received by the contact of the obstacle. The obstacle sensing signal is transmitted from the obstacle sensing signal transmitting unit 47 to the obstacle sensing signal receiving unit 48, and the obstacle sensing signal from the obstacle sensing signal receiving unit 48 is input to the obstacle sensing receiver 44. In this example, the obstacle sensing unit 46 is constituted by a seat plate switch operated by a seat plate that is pushed and moved by an obstacle, and the obstacle sensing signal transmission unit 47 transmits an infrared signal by the operation of the seat plate switch. Then, the obstacle sensing signal receiving unit 48 having a light receiver receives the infrared signal,
It is configured to send a reception signal to the obstacle sensing receiver 44. The obstacle sensing receiver 44 sends a control signal to the switchgear control panel 43.

[0005] An antenna 49 receives a radio signal from the portable radio transmitter 51 or 52, and a radio receiver 45 connected to the antenna 49 demodulates a reception signal from the portable radio transmitter 51 or 52. Then, the ID code is checked, and a control signal is sent to the switchgear control panel 43.

The shutter shown in FIG. 7 is used in an automobile garage, a store, a warehouse, and the like. When operated with a portable radio transmitter, the shutter can be operated from a certain distance. It is rapidly becoming popular because it can be operated from the inside of a car by taking advantage of remote control.

This portable radio transmitter is provided for external operation. Inside, that is,
For operation from the indoor side, a switch box equipped with push button switches wired from the receiver side is mounted on the indoor wall, and opening and closing from indoors is performed by operating this push button switch. It is.

When such a wireless transmitter is used, there is a problem that a built-in battery is consumed, that is, the battery runs out.
If the wireless transmitter is used without knowing that the battery has run out, the operation becomes impossible. In many cases, even if you try to replace the battery, it is not at hand. Then, the wireless transmitter is disabled until a new battery is purchased.

Conventionally, when the battery of the wireless transmitter has run out, the time to replace the battery is notified by turning on an indicator lamp or sounding a buzzer. However, even if a warning is issued due to a battery exhaustion, the battery is not immediately disabled and can be used for the time being. Therefore, the battery may be continuously used without replacing the battery, and the battery may be disabled.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and in an electric shutter for controlling an ascending / descending operation by a radio transmitter, when the radio transmitter runs out of battery, the battery is replaced. It is an object of the present invention to provide an electric shutter capable of compelling the above.

[0011]

According to a first aspect of the present invention, there is provided an electric shutter using a wireless transmitter for transmitting a wireless signal to control a raising and lowering operation of a shutter, wherein the wireless transmitter has a built-in battery. Having a voltage detection unit that detects the voltage of the battery, the voltage detection unit detects the voltage of the battery during operation of the wireless transmitter, and the voltage detection unit detects that the battery has run down to a voltage of a predetermined value or less. When, while alerting the wireless transmitter, the wireless transmitter,
A signal different from a normal signal is transmitted to the receiving unit.

According to a second aspect of the present invention, in the electric shutter according to the first aspect, the receiving unit has a control unit for performing a push-off operation when a signal based on battery exhaustion is received. Things.

According to a third aspect of the present invention, in the electric shutter according to the second aspect, when the push-off operation is a descending operation, the receiving unit is configured to receive a signal from the obstacle detection signal detecting unit during the push-off descending operation. When a detection signal is received, a descent operation is interrupted, and a control means for performing an operation based on the obstacle detection signal is provided.

[0014]

1 and 2 are views for explaining an example of an embodiment of an electric shutter according to the present invention. FIG. 1 is a block diagram, and FIG. FIG. In the figure, 1 is a shutter slat, 2 is a switchgear, 3 is a switchgear control panel, 4 is a receiver, 5 is an obstacle detector, 6 is an obstacle detection signal transmitter, 7 is an obstacle detection signal detector, 8 is an antenna, 9 is a portable wireless transmitter, 10 is a wireless transmitter for indoor installation, 11 is a wireless transmitter for outdoor installation, 1
2 is a push button switch input terminal, and 13 is a case. In FIG. 2, the left side of the shutter slat 1 is the indoor side, and the right side is the outdoor side.

The shutter slat 1 is installed at an opening of a building or the like, and is moved up and down by a switch 2 having a drive motor. The switchgear 2 is controlled by a switchgear control panel 3.
Given to.

When the descending shutter slat 1 comes into contact with an obstacle, that is, when there is an obstacle such as luggage or a person between the seat plate of the shutter slat 1 and the floor,
An obstacle sensing unit 5 provided on a seat plate or the like senses a force received by contact with an obstacle, and transmits an obstacle sensing signal from an obstacle sensing signal sending unit 6 to an obstacle sensing signal sensing unit 7;
The detection signal from the obstacle detection signal detection unit 7 is input to the reception unit 4. In this embodiment, similarly to the conventional example, the obstacle detection unit 5 operates the seat plate switch by the seat plate that is moved by being pushed by the obstacle, and the obstacle detection signal transmission unit 6 transmits the digital infrared signal. And an obstacle detection signal detection unit 7 having a light receiver converts an infrared signal into an electric signal and sends a detection signal to the reception unit 4.

The portable wireless transmitter 9 can be carried, for example, loaded on a vehicle. A plurality of portable wireless transmitters 9 can be used as needed by the user. The indoor-installed wireless transmitter 10 has the same specifications as the portable wireless transmitter 9, but is mounted on an indoor wall or the like. The outdoor-installation wireless transmitter 11 is installed outdoors, such as an outer wall of a building. When using the wireless transmitter for operation from the indoor side and operation from the outdoor side,
Since there is no need to perform wiring, there is an advantage that wiring work and piping work are unnecessary.

The push button switch input terminal 12 is used to connect the push button switch to the main house when the shutter is installed in a garage for an automobile remote from the main house, for example. It is possible to operate the shutter from the main house where infrared rays do not reach. It is also possible to connect the indoor push button switch described with reference to FIG.

In this embodiment, the radio transmitter uses a radio wave as a carrier wave to transmit a digital signal, but may transmit an infrared ray as a carrier wave. A carrier wave such as an ultrasonic wave may be used.

The operation for raising and lowering the shutter will be described.
The portable wireless transmitter 9, the indoor-installed wireless transmitter 10, and the outdoor-installed wireless transmitter 11 include an ascending button, a descending button, and a stop button for instructing the respective operations of “up”, “down”, and “stop”. It has three operation buttons, and can operate the shutter. However, the outdoor-use wireless transmitter 11 is provided with a numeric keypad in addition to the above three operation buttons, and controls the shutter even if the operation button is operated unless the registered ID number is input. Have been unable to do so.

The ID numbers of the portable wireless transmitter 9 and the indoor-installed wireless transmitter 10 are registered in the receiving unit 4, and the registered wireless wireless transmitter 9 and the indoor-installed wireless transmitter 10 are not registered. The shutter is not activated by the operation signal from the transmitter. However, in the portable wireless transmitter 9 and the indoor-use wireless transmitter 10, when the operation button is operated, the code signal of the ID number stored in each transmitter is automatically added together with the operation signal. Sent. Therefore, the user can operate the shutter with the wireless transmitter by first registering the ID number of each wireless transmitter in the receiver 4.

The push button switch connected to the push button switch input terminal 12 also includes an up button, a down button,
It is provided with three operation buttons of a stop button. By installing the shutter button away from the installation location, it is possible to operate from a place where radio waves and the like from the portable wireless transmitter 9 do not reach. If it is not necessary, there is no need to wire the push-button switch input terminal 12.

When the contact of an obstacle is detected while the shutter slat 1 is descending, the operation of the shutter is stopped immediately when the obstacle is sensed, rises for a predetermined time, and stops there or rises. Operation to make it descend again after a predetermined time has elapsed from the time when it stopped, or if obstacles are not removed during this time,
An operation of sensing the obstacle again during the descending again, stopping, ascending, and repeating this operation, or an operation of preventing further descending after the second ascent, etc. Is designed to perform the above operation. A program for performing a plurality of operations described above may be incorporated, and the program may be selected by a dip switch or the like.

When a seat plate switch is used as the obstacle sensing unit 5, it is recognized that an obstacle has been detected when the shutter slats are lowered and the seat plate touches the floor or the like in a normal closing operation. However, there is a risk of a malfunction such as re-elevation after stopping. In this embodiment, the lower limit switch for detecting the lower limit of the lowering of the shutter slat is detected at a position 10 to 20 mm before the ground contact position (a value of 10 to 20 mm is an example, and is not limited to this. It is not something that can be done.) When the seat plate switch is operated in a state where the lower limit switch is operated, it is determined that the seat plate switch is in contact with the floor surface or the like, and the operation is stopped. The predetermined time for performing the reversal rise is adjustable in a range of, for example, 0 to 1.5 seconds. When the predetermined time is set to 0, the operation is stopped by the operation of the seat plate switch. When this predetermined time is set to a value other than 0, the reversal rises to such an extent that no gap is opened with the floor surface or the like.

The obstacle sensing signal sending section is turned on by the operation of the seat switch and sends an obstacle sensing signal. The power supply circuit is controlled by a timer circuit so as to be cut off after a predetermined time. . The timer circuit may be an analog circuit or a digital circuit. Therefore, even if the seat panel switch continues to operate in the closed state, the power is not unnecessarily consumed.

When the seat plate switch is operated before the lower limit switch is operated (generally, when an obstacle is sensed), the seat plate switch reversely rises for 5 seconds and stops. Although it may be made to descend again after a predetermined time, in this specific example, the stop state after the reversal ascent is maintained. By performing the lowering operation after removing the obstacle, the closing operation of the shutter can be completed.

FIG. 3 is a block diagram of an example of the embodiment on the receiving unit side. In the figure, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. 4a is a central processing unit (CPU), 4b is a ROM storing programs and specific data, 4c is a RAM, 4d, 4e, 4f, 4g are input units, and 4h is an output unit. The RAM 4c is a CPU 4a
Is used for temporary storage for the above operation, at least a part of which is constituted by a nonvolatile RAM, and stores an ID code, setting data, and the like of the wireless transmitter. The input unit 4d
It has a demodulator for demodulating a radio signal received from the antenna 8, and the demodulated digital signal is stored in the RAM 4c and analyzed. The input unit 4e receives an output signal from the obstacle sensing signal receiving unit 7. The digital signal created by the obstacle sensing signal transmission unit is stored in the RAM 4c and analyzed. The input unit 4f is for receiving a signal from the input terminal 12, and an operation signal from an operation switch connected to the input terminal is stored in the RAM 4c and analyzed. The input unit 4 g receives signals from the upper limit switch and the lower limit switch generated from the switchgear 2, and inputs the upper limit position signal and the lower limit position signal of the shutter slat to the receiving unit 4. The output unit 4h is an interface that transmits a shutter control signal created by the receiving unit 4 to the switchgear control panel 3.

FIG. 4 is a diagram for explaining a wireless transmitter for indoor installation. FIG. 4A is a perspective view of the wireless transmitter.
4B is a perspective view of the mounting base, FIG. 4C is a perspective view of the decorative cover, and FIG. 4D is a perspective view of the mounted state. In the figure, 21 is a wireless transmitter, 22 is an up button, 23 is a stop button, 24 is a down button, 25 is a low battery indicator, 2
6 is a code registration / deletion switch, 27 is a mounting base, 28 is a mounting hole, 29 is a mounting screw, 30 is an engagement piece, 31 is a decorative cover, 32 is a lid, 33 is a window, and 34 is a tool insertion hole. is there.

In this embodiment, the radio transmitter 21
Although the same one used as a portable wireless transmitter is used, a function that disables the operation of the shutter may be provided if the portable wireless transmitter is removed from the mounting base in consideration of theft or the like. The radio transmitter 21 has an up button 22,
A stop button 23 and a down button 24 are provided. By pressing these buttons, an operation signal including an ID number can be transmitted. The battery exhaustion display section 25 performs lighting display when the voltage of the built-in battery becomes equal to or lower than a predetermined voltage. However, it is preferable in terms of energy efficiency that the display be made intermittently. The code registration / deletion switch 26
This is provided for performing the registration operation and the deletion operation of the ID code of the other wireless transmitter registered in the receiving unit 4. An on / off switch is installed in the back of the small hole, and a thin needle-shaped one is provided. , A structure that can be operated by a switch is adopted.

The mounting table 27 is provided with mounting screws 29 for mounting holes 28.
And attached to a wall, pillar, etc. After attaching the mounting base 27, the wireless transmitter 21 is mounted, and the decorative cover 31 is fitted into the mounting base 27. The upper and lower inner walls of the decorative cover 31 have engaged portions that engage with the engaging pieces 30 of the mounting base 27. When the decorative cover 31 is fitted, the engaged portions of the decorative cover 31 are engaged with the engaging pieces 30. Engage with and dig into. The engagement piece 30 has elasticity. When the engagement piece 30 bites into the engaged portion, the decorative cover 31 cannot be removed by hand.

To remove the decorative cover 31, the decorative cover 3
Tool insertion holes 34 provided on the upper and lower side surfaces
The decorative cover 31 can be removed in a state where the engaging piece 30 is pressed against the elasticity and removed from the engaged portion by inserting a tool having a tapered tip into the end, and removing the engaging cover 30 from the engaged portion. 2
1 can be removed.

As described above, the decorative cover 31 is attached so that it cannot be removed without using an appropriate tool. Therefore, the wireless transmitter 21 fixed to the wall by hand alone without using a tool is removed. Can not do. Such a fixed state of the wireless transmitter that cannot be removed by hand alone is referred to as a substantially irremovably fixed state in this specification.

Since the wireless transmitter 21 is fixed so as to be substantially non-removable, the wireless transmitter 21 mounted on the indoor wall can be prevented from being stolen from anyone who does not know how to remove it.

As described above, when a wireless transmitter similar to a portable wireless transmitter is used as a wireless transmitter for indoor installation, and when a wireless transmitter for outdoor installation is used, the power supply of these wireless transmitters is reduced. In this case, a dry battery or a rechargeable battery is used, and the consumption of the battery becomes a problem. According to the present invention, when the battery is depleted, the wireless transmitter transmits a signal indicating that the battery has run out to the receiving unit together with an operation signal.

FIG. 5 is a flowchart showing the operation of the radio transmitter. FIG. 5A is a flowchart showing an ascending operation, FIG. 5B is a flowchart showing a descending operation, and FIG. 5C is a flowchart showing a stopping operation.

The raising operation shown in FIG. 5A is started by pressing the raising button with a finger to turn on the raising switch. First, in S11, the battery voltage is detected. Proceeding to S12, if the battery voltage is equal to or higher than the predetermined voltage value, proceeding to S13, and transmitting a rising signal. The up signal is continuously transmitted while the up button is pressed.
It may be transmitted repeatedly and intermittently. When the finger is released from the up button, the flow ends.

In S12, if the battery voltage drops below a predetermined voltage value and the battery runs out, the process proceeds to S14,
The indicator light is turned on, and a rising signal is transmitted in S15. The rising signal includes data indicating that the battery has run out. That is, the rising signal includes an ID code of the wireless transmitter, data indicating a rising command, and data indicating running out of battery. This up signal is also transmitted continuously while the up button is pressed. This rising signal may also be transmitted intermittently and repeatedly. When the finger is released from the up button, the flow ends.

When the battery runs out, the warning in the wireless transmitter is not limited to a visual display such as turning on the indicator as described above. An acoustic display such as a buzzer may be used, or these may be used together.

The lowering operation shown in FIG.
The flow of the stop operation shown in (C) is the same as the flow of the ascending operation in FIG. 5 (A), and the description thereof is omitted because only the data contents are different.

It should be noted that the data indicating that the battery is dead may be provided in the transmission signal by providing a bit indicating whether or not the battery is dead, or the rising signal may have different data contents depending on whether the battery is dead or not. Is also good. The same applies to the falling signal and the stop signal.

FIG. 6 is a flowchart for explaining the operation of the receiving section for receiving the transmission signal described in FIG. In this flowchart, it is assumed that a signal indicating battery exhaustion is added to an operation signal for ascending, descending, and stopping from the wireless transmitter and transmitted.

In the standby state in which the receiving section is operating, S41, S42 and S43 are looped. The shutter slat is in a stopped state. Therefore, even if the stop button of the wireless transmitter is pressed and the stop signal is received, the flow of the receiving unit does not need to perform the stop operation, and the loop from the standby state to the standby state via S44 or S44 or S44 and S45. Return to However, if the wireless transmitter is out of battery, there is a signal of battery exhaustion in S44,
The process proceeds to S45, and the buzzer installed in the receiving unit is sounded for a certain period of time, for example, two seconds. In addition, when the receiving unit receives the stop signal, the ID code is identified, and when the ID code is not registered, the signal is ignored. However, the description is not directly related to the present invention. The step of identifying the ID code is omitted.

When an ascending signal is received, S41 to S
The process proceeds to 46, where it is determined whether there is a battery exhaustion signal. If there is no battery exhaustion signal, a normal ascending operation is performed in S47. In the normal ascending operation, when the ascending signal is received, the fact that the ascending signal is present is stored, and the ascending operation is continuously performed even if the ascending signal from the wireless transmitter is interrupted. Therefore, the user only needs to temporarily press the up button, and the lifting operation is continuously performed even when the finger is released from the up button. That is, the ascending operation is performed by looping S47, S48, and S49. When a signal from the upper limit switch is input, the flow shifts from S49 to S50 to perform a stop operation and return to a loop in a standby state. When a stop signal is received during the ascending operation, the flow shifts from S48 to S51 to perform the stopping operation and return to the loop in the standby state.

If the rising signal includes information about running out of battery, the flow shifts from S46 to S52 to start sounding of a buzzer, and in S53, the push-up operation is performed. The buzzer sounds with a timer for a certain period of time, for example, two seconds. Note that the push-off operation is to perform an operation corresponding to the operation button only when the operation button is being pressed, and therefore, in S53, the shutter slat is moved only when the up button of the wireless transmitter is pressed. When the user moves up and releases his / her finger from the up button, the up operation stops. If the shutter slat rises to the position of the upper limit switch even if you keep pressing the up button,
The ascending operation is stopped by the signal from the upper limit switch prior to the ascending signal, but its flow is not shown.

If a descending signal is received in the loop in the standby state, the flow shifts from S42 to S54 to determine whether or not there is a dead battery signal.
At 5, a normal lowering operation is performed. Therefore, even if the descending signal from the wireless transmitter is interrupted, the descending operation is continuously performed. During the descending operation, the process loops S55, S56, and S57. When a signal from the lower limit switch and a signal from the seat plate switch are input, the process proceeds from S57 to S58 to perform a stop operation, and enters a loop in a standby state. Return. When a stop signal is received during the descending operation, the process proceeds from S56 to S59, performs the stop operation, and returns to the loop in the standby state.

If the battery down signal is included in the descending signal, the flow shifts from S54 to S60 to start sounding of a buzzer, and in S61, the push-down operation is performed. The buzzer sounds with a timer for a certain period of time, for example, two seconds. Therefore, in S61, the shutter slat is lowered only when the lowering button of the wireless transmitter is pressed, and the lowering operation stops when the finger is released from the lowering button. If the shutter slat descends to the position of the lower limit switch even if the lowering button is kept pressed, the descending operation starts the stop operation by the signal from the upper limit switch in preference to the descending signal, but the illustration of the flow is omitted. did.

Also, during the descending operation of S55 or in S6
If the receiving unit receives a signal indicating that an obstacle has been detected during the push-down operation of No. 1, an operation in the case of detecting contact with an obstacle, for example, a reversing operation for a certain period of time after stopping, is performed. Illustration of the flow is also omitted.

As described above, when the battery of the radio transmitter runs out of power, not only a warning of running out of battery is given by a lighting display, but also by pushing off operation, the user can raise the button until the shutter slat is fully opened or fully closed. Or you are forced to hold down the down button, forcing you to change batteries. Therefore, even if there is a warning about running out of the battery as in the related art, it is possible to prevent neglect of replacing the battery.

When a plurality of wireless transmitters are used, the push-down operation is performed when the up button or the down button is pressed with a wireless transmitter with a dead battery. No action is taken.

In the above-described embodiment, the electric shutter having a configuration for detecting an obstacle has been described. However, in the present invention, it is not always necessary to perform the obstacle detection. It can also be applied to a non-powered shutter Also, a push button switch input terminal is not always required.

[0051]

As is apparent from the above description, according to the present invention, when the battery of the radio transmitter runs out, the radio transmitter is warned, and the radio transmitter receives the normal signal. By transmitting a different signal to the receiving unit, the receiving unit can recognize that the wireless receiver that transmitted the battery is dead, and the receiving unit determines whether the battery of the wireless transmitter is dead. An appropriate operation selected based on the operation can be performed.

As the operation, when the receiving unit receives a signal based on the exhaustion of the battery, by performing the push-off operation, it is possible to force the replacement of the battery. Also, when the push-off operation is a descending operation, when a detection signal from the obstacle sensing signal detection unit is received during the push-off descending operation,
By interrupting the descending operation and performing the operation based on the obstacle detection signal, it is possible to prevent the obstacle from being damaged or the shutter from being damaged.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an example of an embodiment of an electric shutter according to the present invention.

FIG. 2 is a layout diagram showing the electric shutter of FIG. 1 separately for an indoor side and an outdoor side.

FIG. 3 is a block diagram illustrating an example of an embodiment on a receiving unit side;

FIG. 4 is an explanatory diagram of a wireless transmitter for indoor installation according to the embodiment of the present invention.

5 is a flowchart showing an operation of the wireless transmitter, FIG. 5 (A) is a flowchart showing an ascending operation, FIG. 5 (B) is a flowchart showing a descending operation, and FIG. 5 (C) is a flowchart showing a stopping operation.

FIG. 6 is a flowchart illustrating an operation of a receiving unit that receives the transmission signal described in FIG. 5;

FIG. 7 is a configuration diagram of an example of a remote-controlled electric shutter using radio waves.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Shutter slat, 2 ... Switch, 3 ... Control part, 4
... Receiving part, 5 ... Obstacle sensing part, 6 ... Obstacle sensing signal sending part, 7 ... Obstacle sensing signal detecting part, 8 ... Antenna, 9 ... Portable wireless transmitter, 10 ... Indoor wireless transmitter, 11 ...
Wireless transmitter for outdoor installation, 12: Push button switch input terminal, 13: Case, 21: Wireless transmitter, 22: Up button, 23: Stop button, 24: Down button, 25: Low battery indicator, 26: Cord Registration / deletion switch, 27
... Mounting stand, 28 ... Mounting hole, 29 ... Mounting screw, 30 ... Engagement piece, 31 ... Cosmetic cover, 32 ... Lid, 33 ... Window, 34
... Tool insertion hole.

Claims (3)

[Claims] 1. An electric shutter that uses a wireless transmitter that transmits a wireless signal to control a raising and lowering operation of a shutter, wherein the wireless transmitter has a voltage detection unit that detects a voltage of a built-in battery, At the time of operation of the wireless transmitter, the voltage detection unit detects the voltage of the battery, and when the voltage detection unit detects that the battery has run down to a voltage equal to or less than a predetermined value, the voltage detection unit warns the wireless transmitter, The electric shutter, wherein the wireless transmitter transmits a signal different from a normal signal to a receiving unit. 2. The electric shutter according to claim 1, wherein the receiving unit has a control unit that performs a push-off operation when receiving a signal based on a battery exhaustion. 3. When the push-off operation is a descending operation, the receiving unit, when receiving a detection signal from the obstacle detection signal detecting unit during the push-down operation, interrupts the descending operation and outputs an obstacle detection signal. The electric shutter according to claim 2, further comprising control means for performing an operation based on the shutter.