JP2983239B2 - Lock confirmation device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lock confirmation device for windows and the like.

[Prior Art] Japanese Patent Application Laid-Open No. 62-27891 discloses a sliding door housed in an opening of a building, which is used to confirm the locking of a crescent lock which locks a sliding door by engagement of a rotating engagement member and a fixed engagement member. It is conceivable to use an electromagnetic coupling communication system as described in Japanese Patent Application Laid-Open Publication No. H10-260, 1988.

The lock confirmation device using this electromagnetic coupling communication system
It is composed of a main device and a sensor device housed in a door separated from the main device. Then, the main device transmits a signal generation unit that generates a specific monitoring frequency signal, a detection unit that detects the presence or absence of an echo from the sensor device, and a generation signal of the signal generation unit by electromagnetic coupling to the sensor device, A first antenna for receiving an echo from the sensor device, a changeover switch for switching and connecting each of the signal generation unit and the detection unit to the first antenna, and a changeover switch for switching the signal generation unit and the detection unit at a constant cycle. It has a control unit for switching to each side and a display unit for displaying the detection result of the detection unit. Also, the sensor device receives a monitoring frequency signal from the signal generating unit by electromagnetic coupling and transmits an echo resonating to the signal to the main device, and a monitoring frequency signal from the main device. And a reed switch inserted between the second antenna and the resonance circuit and turned on / off in conjunction with the locking and unlocking of the door.

As a result, if the reed switch is turned on in conjunction with the locking of the door, in the sensor device, the resonance circuit is closed with the second antenna, and the resonance circuit is received by the monitoring frequency signal received through the second antenna. Resonate, and an echo due to the resonance current is received by the first antenna by electromagnetic coupling. When the reed switch is off, the echo does not occur because the second antenna is disconnected. Since the echo received via the first antenna is input to the detection unit of the main device, the detection unit can detect the locked / unlocked state of the door based on the presence of the echo.

[Problems to be Solved by the Invention] However, the prior art has the following problems.

The reed switch is turned on / off magnetically in conjunction with locking and unlocking of the door, and does not use the engagement itself between the fixed engagement member and the rotation engagement member as an on / off operation factor.
For this reason, the reed switch may be turned on due to idling of the rotation engaging member or the like, and the reliability of locking confirmation is low.

The second antenna included in the sensor device is installed only in a narrow area locally around the reed switch mounting portion of the door frame material. For this reason, there is a limit to the improvement of the transmission / reception performance of the second antenna, and there is an inconvenience that the degree of freedom in selecting a relative installation position between the main device and the sensor device is small.

The present invention detects the locking / unlocking of the lock itself, and installs an antenna for electromagnetic coupling communication in a wide range of the entire door,
An object of the present invention is to make it possible to easily secure the reliability of locking confirmation.

[Means for Solving the Problems] The present invention according to claim 1 comprises a main device and a sensor device provided in a door housed in an opening of a building separated from the main device. A lock confirmation device for a lock that locks by engagement of two engagement members, wherein the main device includes a signal generation unit that generates a specific monitoring frequency signal, and a detection unit that detects the presence or absence of an echo from the sensor device. A first antenna that transmits a signal generated by the signal generation unit to the sensor device by electromagnetic coupling, and receives an echo from the sensor device;
A changeover switch for switching and connecting each of the signal generation unit and the detection unit to the first antenna, a control unit for changing the changeover switch to each of the signal generation unit and the detection unit at a fixed cycle, and a detection result of the detection unit. The sensor device comprises a first fixed engaging portion and a second fixed engaging portion which constitute a fixed engaging member fixed to the door side and are electrically insulated from each other. And a lock switch that can conduct when the fixed engagement portion and the movable engagement member are engaged with each other, and a first switch that is provided in a loop along substantially the entire periphery of the door to form the lock switch. An antenna circuit for connecting the fixed engagement portion and the second fixed engagement portion and forming a second antenna for receiving a monitoring frequency signal from the main device by electromagnetic coupling, and a lock switch and the antenna circuit; And inserted from the main unit It is obtained so as to be configured with a resonant circuit corresponding to the use frequency signal.

According to a second aspect of the present invention, the resonance circuit of the sensor device is an LCX parallel resonance circuit including a second antenna, a capacitor, and a solid-state vibrator.

[Operation] According to the first aspect of the present invention, the following operation and effect can be obtained.

When the door is locked and the lock switch is closed upon completion of the engagement of the rotation engagement member with the first fixed engagement portion and the second fixed engagement portion of the fixed engagement member, resonance with the second antenna occurs. Since the closed circuit including the circuit is formed, in the sensor device, the resonance circuit resonates by the monitoring frequency signal received through the second antenna, and an echo due to the resonance current is received by the first antenna by electromagnetic coupling. . When the door is unlocked, the locking switch is open and the second antenna is disconnected, so that the echo does not occur. In the main device, the echo received via the first antenna is input to the detection unit, and the detection unit can detect the locked state of the door based on the presence or absence of the echo. At this time, the lock switch opens and closes by the engagement itself between the fixed engagement member and the rotation engagement member, in other words, detects whether the lock itself is unlocked or unlocked. Therefore, there is no erroneous detection of locking and unlocking, and the reliability is high.

The second antenna of the sensor device is provided in a loop along substantially the entire periphery of the door, and extends over a wide area facing the inside and outside of the building. Therefore, the second
There is an advantage that the transmission / reception performance of the antenna can be easily improved, and the degree of freedom in selecting a relative installation position between the main device and the sensor device is increased.

That is, the locking / unlocking of the lock itself is detected, and the antenna for electromagnetic coupling communication is installed in a wide range of the entire door, so that the reliability of the lock confirmation can be easily secured.

According to the second aspect of the present invention, the following operation and effect can be obtained.

By generating an echo for the monitoring frequency signal in the LCX parallel resonance circuit, the attenuation of the echo becomes gradual, and as a result, the echo level after the lapse of the same time increases and the detection distance can be extended, and as a result, the main unit and the main unit can be detected. The wireless section between the sensor devices can be increased. Therefore, the degree of freedom regarding the location of the main device and the sensor device is increased, and the construction of the lock confirmation device can be simplified.

[Embodiment] FIG. 1 is a front view of an essential part showing a lock confirmation sensor device, FIG.
FIG. 3 is a schematic diagram showing a crescent lock, FIG. 3 is a schematic diagram showing a security device, FIG. 4 is a block diagram showing a security device, FIG. 5 is an electric circuit diagram showing the security device, and FIG. It is a schematic diagram which shows the construction state of a unit building.

As shown in FIG. 6, the unit building 1 is configured by joining a plurality of building units 3 to each other on the upper part of the foundation 2.

The unit building 1 is provided with a security / disaster prevention device 10 composed of an electromagnetic coupling communication system as shown in FIGS.

The security device 10 includes a main device 20 and a plurality of sensor devices 30 (a window locking confirmation sensor device 30A, a door locking device) disposed in a certain building unit 3 as a specific monitoring target of the unit building 1 separated from the main device 20. Confirmation sensor device 30B, fire sensor device 30C, etc.).

The main device 20 includes a signal generation unit 21, a detection unit 22, a first antenna 23 (inductance L1), a changeover switch 24,
It is configured to include a control unit 25 and a display unit 26.

The signal generator 21 changes the frequencies f1 and f1 by switching the oscillation circuit or by performing frequency modulation.
2, f3... Are sequentially and cyclically transmitted in a predetermined cycle.

The detection unit 22 captures a signal from each sensor device 30, performs signal amplification and the like, and detects the presence or absence of an echo. At this time, the detection unit 22 detects the state of each monitoring target (window locked state, entrance locked state, fire occurrence state, etc.) from the presence or absence of the echo and the frequency.

The first antenna 23 is, for example, a loop antenna,
The signal generated by the signal generator 21 is transmitted by electromagnetic coupling, and the echo is received.

The changeover switch 24 switches and connects each of the signal generator 21 and the detector 22 to the first antenna 23.

The control unit 25 controls the activation and stop of the signal generation unit 21, and every time the signal generation unit 21 sends out the monitoring frequency signal,
After the transmission, the switch 24 is switched to the detection unit 22 just before the echo from each sensor device 30 is attenuated.

The display unit 26 displays the detection result of the detection unit 22 by, for example, turning on or off the light emitting element or sounding a buzzer.

Each sensor device 30 (30A, 30B, 30C...) Includes a second antenna 31 (inductance L2) and a capacitor 32 (capacitance C).
2), crystal oscillator 33 (X), sensing switch 34 (window lock switch 34A, entrance lock switch 34B, heat sensing switch
34C).

The second antenna 31 of each sensor device 30 is connected to the monitoring frequency signal f from the signal generator 21 of the main device 20 by electromagnetic coupling.
1, f2, f3,..., And transmit an echo resonating at any one of these frequencies.

In each sensor device 30, the second antenna 31, the capacitor 32, and the crystal unit 33 constitute an LCX parallel resonance circuit, and the frequencies f1, f of the monitoring frequency signals transmitted by the signal generation unit 21.
L2, C3 to resonate with any one of 2, f3 ...
2. The value of X is selected.

The sensing switch 34 of each sensor device 30 is inserted between the parallel circuit of the capacitor 32 and the crystal unit 33 and the second antenna 31, and is turned on / off by detecting a window lock, a door lock, a fire or the like.
Turn off.

 Next, the operation of the security and disaster prevention device 10 will be described.

In the security device 10, the signal generator 21 of the main device 20 is used.
Are transmitted cyclically at predetermined time intervals, and are sequentially and cyclically oscillated from the first antenna 23.

Now, it is assumed that only the window lock switch 34A to be monitored provided with the window lock confirmation sensor device 30A that resonates at the frequency fn is closed by locking the window. At this time, security equipment 10
Operates as follows (A) and (B).

(A) While the monitoring frequency signals of the frequencies f1, f2, f3... F (n-1) are being transmitted from the signal generation unit 21, the sensor switches 30 other than the window lock confirmation sensor device 30A have their sensing switches 34 turned off. Does not work.

Since the window lock switch 34A is ON, the window lock confirmation sensor device 30A has the first antenna 23 and the second antenna
31 and electromagnetic coupling, but does not perform resonance operation.

(B) When the monitoring frequency signal of the frequency fn is transmitted from the signal generator 21 and oscillated from the first antenna 27 The switch 24 is set to the signal generator 21 side (contact a) and the signal generator 21 , A current having a frequency fn flows through the first antenna 23.

Due to the above, a magnetic flux is generated from the first antenna 23, and among the sensor devices 30, the window lock confirmation sensor device 30A in which the window lock switch 34A is in an on state performs parallel resonance, and the resonance current is applied to the second antenna 31. Flows.

The switch 24 is switched to the detection unit 22 side (contact b) at the timing synchronized with the end of the oscillation.

As a result, the magnetic flux from the first antenna 23 disappears, and an echo (alternating magnetic flux) is generated from the second antenna 31.

Through the mutual inductance M, the first antenna 23
And the second antenna 31 are electromagnetically coupled, and the first antenna 23
Induced current flows through.

That is, an echo generated in the window lock confirmation sensor device 30A in response to the monitoring frequency signal is received by the first antenna 23 by electromagnetic coupling, and the received signal is input to the detection unit 22 through the changeover switch 24, where it is input. It is amplified.

The detecting unit 22 confirms the lock confirmation sensor device 30A to which the frequency is assigned based on the frequency of the received reception echo, and displays on the display unit 26 monitoring information on the detection result (locking of the window) of the sensor device 30A. .

At the timing when the signal processing and the discrimination processing in the detection unit 22 are completed, the control unit 25 switches the changeover switch 24 to the signal generation unit.
Switching is performed on the 21 side (contact a), and the signal generator 21
Sends a monitoring frequency signal of frequency f1.

By the way, the resonance current of the LCX parallel resonance circuit, due to the presence of the crystal oscillator 33, its attenuation becomes gentler than in the case of the LC parallel resonance circuit, and the time t0 until it attenuates to a receivable critical level becomes longer. . This means that the transmittable / receivable distance between the first antenna 23 of the main device 20 and the second antenna 31 of the sensor device 30 can be extended. or,
Since the Q of the LCX parallel resonance circuit is high, the resonance waveform becomes sharp, and the frequency band required for identifying the received echo is narrow, so that it is easy to identify a plurality of echoes in different frequency ranges without interference. .

However, in the above embodiment, the window lock confirmation sensor device
30A is a crescent lock provided on a sliding door 42 (right sliding door 42A and left sliding door 42B) housed in a window opening frame 41 as shown in FIGS. 43 locks can be checked and are configured as follows. still,
The crescent lock 43 has a rotating engagement member 45 supported by the frame member 44A of the right sliding door 42A, and a fixed engaging member 46 fixed to the frame member 44B of the left sliding door 42B. Have been. Thereby, the crescent lock 43 engages the rotating engagement member 45 with the fixed engagement member 46 in a state in which both the sliding doors 42A and 42B are fully closed, so that the sliding doors 42A and 42B 42B can be locked.

Thus, the window lock confirmation sensor device 30A includes the above-described window lock switch 34A, an antenna circuit 35 forming the second antenna 31, a second antenna 31, a capacitor 32, and a quartz oscillator 33. LCX parallel resonance circuit.

At this time, the window locking switch 34A is
6 and a first fixed engaging portion 46A and a second fixed engaging portion 46B which are electrically insulated from each other.
Conduction is possible under the engagement state between 46A and 46B and the rotation engagement member 45. The fixed engaging portions 46A and 46B are electrically insulated from each other by an insulating portion 46C made of a hard synthetic resin material.

Further, the antenna circuit 35 forming the second antenna 31 includes:
A first fixed engaging portion 46A and a second fixed engaging portion 46B which are provided on the window glass of the left sliding door 42B along the peripheral edge thereof and constitute the window locking switch 34A are electrically connected. still,
The antenna circuit 35 can be easily installed by attaching a plastic film on which the second antenna 31 is printed in a loop shape to a window glass surface.

The LCX parallel resonance circuit including the second antenna 31, the capacitor 32, and the crystal unit 33 is a window lock switch 34A.
And the antenna circuit 35, and corresponds to the monitoring frequency signal from the main device 20 as described above.

 Next, the operation of the above embodiment will be described.

When the sliding door 42 is locked, the window locking switch 34A is closed upon completion of the engagement of the rotating engagement member 45 with the first fixed engagement portion 46A and the second fixed engagement portion 46B of the fixed engagement member 46. Then, the second
Circuit 3 including the antenna 31 and the LCX parallel resonance circuit
Since the closed circuit of 5 is formed, the window lock confirmation sensor device 30A
In the above, the LCX parallel resonance circuit resonates with the monitoring frequency signal received through the second antenna 31, and the echo due to the resonance current is received by the first antenna 23 by electromagnetic coupling. When the sliding door 42 is opened, the window lock switch 34A is closed and the second antenna 31 is disconnected, so that the echo does not occur. In the main device 20, the first antenna 23
The echo received via is input to the detection unit 22,
The detection unit 22 can detect the locked state of the sliding door 42 from the presence or absence of the echo. At this time, the window locking switch 34A opens and closes by the engagement between the fixed engagement member 46 and the rotation engagement member 45 itself, in other words, detects the locking and unlocking of the crescent lock 43 itself. Therefore, there is no erroneous detection of locking and unlocking, and the reliability is high.

Also, the second antenna 31 of the window lock confirmation sensor device 30A.
Is provided in a loop along the entire periphery of the sliding door 42,
The antenna 31 extends over a wide area facing the inside and outside of the building. For this reason, the transmission / reception performance of the second antenna 31 is easily improved, and the main device 20 and the window lock confirmation sensor device 30 are improved.
There are merits such as increasing the degree of freedom in selecting the installation position relative to A.

That is, the locking / unlocking itself in the crescent shape 43 is detected, and the antenna 31 for electromagnetic coupling communication is installed in a wide range of the entire sliding door 42, so that the reliability of locking confirmation can be easily secured.

By generating an echo for the monitoring frequency signal in the LCX parallel resonance circuit, the echo is gradually attenuated, and as a result, the echo level after the lapse of the same time is increased, so that the detection distance can be extended, and as a result, the main device 20
The wireless section between the wireless communication device and the sensor device 30 can be increased. Therefore, the degree of freedom regarding the location of the main device 20 and the sensor device 30 is increased, and the construction of the security device 10 can be simplified.

In the embodiment of the present invention, the resonance circuit constituting the sensor device does not necessarily need to be an LCX parallel resonance circuit.

[Effects of the Invention] As described above, according to the present invention, the locking / unlocking of the lock itself is detected, and the antenna for electromagnetic coupling communication is installed in a wide area of the entire door, and the reliability of the lock confirmation is easily increased. Can be secured.

[Brief description of the drawings]

FIG. 1 is a front view of a main part showing a lock confirmation sensor device, FIG. 2 is a schematic diagram showing a crescent lock, FIG. 3 is a schematic diagram showing a security device, FIG. 4 is a block diagram showing a security device,
FIG. 5 is an electric circuit diagram showing a crime prevention and disaster prevention device, and FIG. 6 is a schematic diagram showing a construction state of a unit building. 10 security / disaster prevention device, 20 / main device, 21 / signal generator, 22 / detector, 23 / first antenna, 24 / switch, 25 / control unit, 26 / display Part, 30A ... window lock confirmation sensor device, 31 ... second antenna, 32 ... capacitor, 33 ... crystal oscillator, 34 ... sensing switch (window lock switch 34A) 35 ... antenna circuit, 41 ... ... Window opening frame, 42 ... Sliding door, 43 ... Crescent lock, 45 ... Rotating engaging member, 46 ... Fixing engaging member, 46A ... First fixed engaging portion, 46B ... Second Fixed engagement part, 46C …… Insulation part.

Claims (2)

(57) [Claims] A main unit, and a sensor device provided on a door housed in an opening of a building separated from the main unit;
A lock confirmation device for locking the door by engagement of two engagement members, wherein the main device detects a signal generation unit that generates a specific monitoring frequency signal, and detects the presence or absence of an echo from a sensor device. A first antenna for transmitting a signal generated by the signal generator to the sensor device by electromagnetic coupling, and receiving an echo from the sensor device, and a first antenna for each of the signal generator and the detector. A sensor device comprising: a changeover switch for changeover connection; a control unit for changing over the changeover switch to each side of the signal generation unit and the detection unit at a constant cycle; and a display unit for displaying a detection result of the detection unit. Comprises a first fixed engagement portion and a second fixed engagement portion which constitute a fixed engagement member fixed to the door side and are electrically insulated from each other, Conduction is possible under engagement with That the lock switch is provided in a loop along the substantially entire periphery of the door, along with connecting the first fixed engagement portion constituting the lock switch and the second fixed engagement portion,
An antenna circuit forming a second antenna for receiving a monitoring frequency signal from the main device by electromagnetic coupling, and a resonance circuit inserted between the locking switch and the antenna circuit and corresponding to the monitoring frequency signal from the main device And a lock confirmation device comprising: 2. The lock confirmation device according to claim 1, wherein the resonance circuit of the sensor device is an LCX parallel resonance circuit including a second antenna, a capacitor, and a solid-state vibrator.