JPH0434664B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a wireless electric lock that can be unlocked using a wireless signal.

[Background Art] Conventionally, this type of wireless electric lock is equipped with a transmitter and a receiver, and only while the unlocking push button of the transmitter is pressed as shown in Fig. 7a, the lock is activated as shown in Fig. 7b. There were some that could be unlocked, and others that could be unlocked after pressing the transmitter button once as shown in Figure 8a, as shown in Figure 8b. However, in the former case, the lock cannot be unlocked unless the button on the transmitter is continuously pressed, so if one person attempts to unlock the lock, for example, only one hand is free, making it difficult to unlock the lock. In addition, in the latter case, the unlockable state continues from the moment the transmitter button is pressed, so if you forget to release the unlockable state, the lock can always be unlocked, which eliminates problems that may cause accidents such as theft. It was hot.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and its purpose is to enable the lock to be unlocked without continuously pressing the push button, and to prevent the user from forgetting to release the unlockable state. Our objective is to provide a wireless electric lock that can prevent this.

[Disclosure of the Invention] (Embodiment) FIGS. 1 to 6 are diagrams showing an embodiment of the present invention. In this embodiment, a signal is transmitted by pressing the unlocking push button SW ₁ of the transmitter 1. A wireless electric device that receives an unlocking signal with a receiver 2 and uses the output of the receiver 2 to release the latch state of the door opening/closing lever 22 of the electric lock body 27, thereby making the electric lock body 27 in an unlockable state. The lock includes a first unlocking means that automatically unlocks the unlockable state of the electric lock body 27 after a predetermined period of time has elapsed after the electric lock body 27 becomes the unlockable state, and a first unlocking means that automatically unlocks the unlockable state of the electric lock body 27; Operate the lever 22 of the electric lock body 27 within the period to close the electric lock body 27.
The second releasing means releases the unlockable state of the electric lock main body 27 when the electric lock main body 27 is unlocked.

First, the overall configuration of the wireless electric lock provided with this embodiment will be schematically explained. This wireless electric lock is equipped with a transmitter 1 and a receiver ₂ as shown in FIG. When the push button SW ₁ is pressed, an oscillation circuit 3 oscillates a lock signal, and a modulation circuit 5 modulates the unlock signal into a carrier wave, which is then transmitted from a built-in loop antenna 6, for example. Here, the output of the oscillation circuit 3 is input to the beep generating circuit 7 so that the user can recognize that the unlock signal is being output to the transmitter 1, and a sound of an audible frequency is generated by the piezoelectric buzzer 8. I'm starting to do that. The receiver 2 includes a separate dedicated antenna 9 for receiving the wireless signal transmitted from the transmitter 1, and this antenna 9
An unlocking signal is detected from the output in a receiving circuit 10, and when the receiving circuit 10 is receiving a signal transmitted by the transmitter 1, an indicator light 12 is turned on to indicate that it is in a receiving state. The output of this receiving circuit 10 is input to a signal processing circuit 13 made up of a microcomputer, where it is compared with its own unlocking signal set in the channel switch 15 and converted into a pulse signal necessary for the operation of subsequent circuits. . here,
When the own unlock signal is detected, the indicator light 14
lights up to indicate that its own unlock signal has been received. The output of the signal processing circuit 13 operates a timer circuit 16 as a 15-second timer, and the output of the timer circuit 16 drives the relay circuit 28 to enable the electric lock body 27 to be unlocked. Then, the timer circuit 16 generates a high level output for 15 seconds, and 15
After seconds have elapsed, the output changes to low level, but at the same time, the relay circuit 28 operates to release the self-holding state and is equipped with a first release means that automatically releases the unlockable state, and the lever 22
A second circuit is inserted between the timer circuit 16 and the relay circuit 28 so as to release the self-holding state of the relay circuit 28 and release the unlockable state when the electric lock main body 27 is unlocked by operating the electric lock body 27. and release means. Further, in the case of a vehicle such as a truck 25, the power source of the receiver 2 is such that the voltage of a battery is regulated by a constant voltage circuit 18 to supply power to each of the above-mentioned circuits.

Furthermore, the specific configuration of the main parts of this embodiment will be explained. First, this embodiment is applied to a vehicle, especially a truck 25.
Lever 22 for opening and closing the rear door 26, which is a door such as
The present invention relates to a wireless electric lock equipped with a wireless electric lock.
The electric lock main body 27 of this embodiment includes a lever 22 that extends in a bar-shaped manner between the right and left rear doors 26 of a truck 25 that are opened double-sided as shown in FIG. 4, and a latch 23 that is housed in one rear door 26. The latch mechanism is constructed of a latch mechanism that protrudes from the rear door 26 so as to be movable forward and backward. One end of the lever 22 is attached to the rear door 26 in which the latch mechanism is not housed.
The other end of the latch 23 is pivoted so that it can rotate upward from the horizontal direction, and when the latch 23 retreats into the rear door 26, the other end is rotated upward and the left and right rear doors 26 are engaged. The rear door 26 can be opened by positioning the lever 22 on the side of the rear door 26 on which the latch mechanism is not housed. The latch mechanism also includes a latch 23, a solenoid 20, a drive circuit 21, a battery B ₂ ,
The contact point _r1 of the relay _Ry will be described in detail later. And the latch body 23 of the latch 23
Similarly to a normal door, when the lever 22 is located at the upper side in the figure, when the other end of the lever 22 is rotated from above to below, it retreats into the rear door 26 and the other end of the lever 22 locks into the latch 23. The upper surface is formed into a curved surface so that the latch 2 can be overcome.
The lower surface of the lever 22 is formed into a flat surface so that the other end of the lever 22 cannot be rotated upward when the lever 3 is fixed and protrudes forward. Here, the latch mechanism mechanically fixes the latch 23 in a protruding state when the lever 22 rotates from above to below and overcomes the latch 23.
Mechanical latching means (not shown) are provided to prevent latch 23 from retracting into rear door 26. The latch 23 also includes a latch body 23a that is locked to the lever 22 as described above, and a rear part of the latch body 23a, that is, a rear door 2 of the tractor 25.
6 and a rod-shaped shaft 24 protruding inwardly from the solenoid 20. This shaft 24 is inserted into the solenoid 20. The solenoid 20 constitutes a circuit for driving the latch 23 with a drive circuit 21, a battery B ₂ , and a contact r ₁ of the relay R _y . As for operation, it is a contact point.
When r ₁ is closed, drive circuit 21 operates to energize solenoid 20 . By drawing the shaft 24 of the latch 23 into the rear door 26 by the magnetomotive force of the solenoid 20, the latch body 23a of the latch 23 is retracted into the rear door 26.

Next, the relay circuit 28 for controlling the opening/closing state of contact _r1 of the latch mechanism will be explained with reference to FIG. Here, FIG. 1 shows the signal processing circuit 13
This shows the circuit configuration at a later stage. This relay circuit 28 is composed of a relay R _y , a transistor Q ₁ for driving the relay, a transistor Q ₂ for self-hold release, a pulse width amplifying circuit 19 as a driving circuit for the transistor Q ₂ , and a fall detection circuit 32. Relay R _y has normally open contacts r ₁ and r ₂ . The relay _Ry is connected in series with the battery of the track 25, for example, together with the transistor _Q1 . And in parallel with this transistor Q ₁ is the second contact r ₂ of the relay R _y and the transistor
A series circuit of Q ₂ is connected. Therefore,
In relay R _y , when transistor Q ₁ becomes conductive, relay R _y is driven, and at the same time contact r ₁ and contact r ₂ are closed _.
It is self-maintained by passing a drive current through _Q2 . Note that since the pulse width amplification circuit ₁₉ normally produces a high level output, the transistor Q2 becomes conductive at the same time as the contact _r2 is closed.

The conduction control of the transistor _Q1 that drives the above-mentioned relay _Ry will be explained. this transistor
The pulse signal shown in FIG. 2a, which is the output of the signal processing circuit 13, is input to the base of Q ₁ via a NAND circuit 29 and an inverter 30. Therefore, when this pulse signal is input, the transistor _Q1 becomes conductive, thereby driving the relay _Ry . Note that the above pulse signal is also input to the timer circuit 16 via the inverter 31,
The timer circuit 16 outputs a high level signal for 15 seconds by detecting the rising edge of the pulse signal as shown in FIG. 2b. This timer circuit 16
Since the output is also input to the NAND circuit 29 and the inverter 30, the transistor _Q1 is connected to the timer circuit 1.
The transistor Q1 is made conductive only when the outputs of the transistor Q1 and the signal processing circuit 13 are at a high level, thereby preventing the transistor _Q1 from malfunctioning due to noise or the like.

Next, the first release means will be explained. This release means is composed of a Schmitt trigger circuit 32a that detects the fall of the output of the timer circuit 16 shown in FIG. 2b and generates a one-pulse signal shown in FIG. 2c, a capacitor C, a diode D, and a resistor R. a falling detection circuit 32, a pulse width amplification circuit 19 that converts the output of this fall detection circuit 32 into a pulse signal of a predetermined width, and a pulse width amplification circuit 19.
The pulse width amplification circuit 19 is composed of a transistor _Q2 whose conduction is controlled by the output.
It operates to output a 300mS low level signal. The output of this pulse width amplification circuit 19 turns off the transistor _Q2 and releases the self-holding state of the relay _Ry . Therefore, contact _r1 of relay _Ry is also opened, and the energized state of the solenoid 20 is released.
Since the latch body 23a is maintained in a state protruding from the rear door 26, the lever 22 must be rotated within 15 seconds while the timer circuit 16 is producing a high level output, as shown in section A in FIG. If the rear door 26 is not opened, the latch 23 will be electrically fixed, making it impossible to automatically open the lever 22.

The above is an explanation of the first release means. Next, once the lever 22 is rotated and the rear door 26 is opened, the electric lock main body 27 is kept in an unlockable state for 15 seconds by the first release means. There is no longer a need to hold it. Therefore, in this embodiment, a switch SW ₂ is provided which opens and closes by rotating the lever 22 when the lever 22 is released from the latch 23 of the electric lock body 27.
This switch SW ₂ is inserted between the battery and the relay _Ry , the lever 22 is rotated, and the electric lock body 27 is rotated.
When the switch is opened, switch SW ₂ is opened to stop the power supply to the relay _Ry by the battery, so that the self-holding state of the relay _Ry can be released as shown in part B in Fig. 6. It is set as. Note that when the lever 22 is detached from the latch body 23a, switch SW ₂ closes the electric lock body 2.
7 is in a state where the unlockable state of the electric lock body 27 is electrically and mechanically released, but the electric lock body 2
Since the lever 22 released from the locking state with the latch body 23a of No. 7 is located above the latch body 23a, by rotating the lever 22 downward, the mechanical latch can be opened like a normal mechanical door. When the fixed state of the main body 23a is released, the lever 2
The latch 23 retreats inwardly into the rear door 26 by the rotational force of 2, and the lever 22 is mechanically latched with the lever 22 climbing over the latch body 23a.
Therefore, once the latch 23 has been mechanically secured, it cannot be unlocked. Furthermore, even if the unlock signal is issued by the transmitter 1 with the lever 22 removed, power is not supplied to the relay _Ry due to the release of the lever 22, so As shown, even if a new unlocking signal is received, the electric lock main body 27 does not become unlockable.

[Effects of the Invention] As described above, the present invention includes a first releasing means that automatically releases the unlockable state of the electric lock body after a predetermined period of time has passed after the electric lock body becomes the unlockable state. and a second release means for releasing the unlockable state of the electric lock body when the electric lock body is unlocked by operating the lever of the electric lock body within the predetermined unlockable period. If you press the push button on the transmitter and send an unlock signal to the receiver, the receiver output will enable the electric lock to be unlocked for a predetermined period of time, so you can always operate the unlock push button when you want to unlock. There is no need to keep pressing the lock, and unlike conventional methods, unlocking can only be done with one hand, making the unlocking process easier. When a predetermined period of time has elapsed after the reception, the unlockable state is automatically released by the first release means, so that the electric lock is not left in the unlockable state without being unlocked. When the electric lock main body is unlocked by operating the lever on the main body, the unlockable state is released by the second release means, so once the electric lock is locked, it can no longer be unlocked.
This eliminates the need to forget to release the unlockable state, which is effective for crime prevention, etc.

[Brief explanation of drawings]

Fig. 1 is a specific circuit configuration diagram of the main part of an embodiment of the present invention, Fig. 2 is an explanatory diagram of the circuit operation of the same as above, Fig. 3 is an explanatory diagram showing the structure of the electric lock main body, and Fig. 4 is the same as the above. 5 is a block diagram showing the overall configuration of the same as above, FIG. 6 is an explanatory diagram of the operation of the same as the above, FIG. 7 is an explanatory diagram of the operation of the conventional example, and FIG. 8 is another conventional example. FIG. 1 is a transmitter, 2 is a receiver, SW ₁ is a push button for unlocking,
SW ₂ is a switch, 22 is a lever, 26 is a rear door, 27 is an electric lock body, R _y is a relay, r ₁ and r ₂ are contacts, Q ₁ and Q ₂ are transistors, 16 is a timer circuit,
19 is a pulse width amplification circuit, and 32 is a falling detection circuit.

Claims (1)

[Claims] 1 The receiver receives the unlocking signal sent by pressing the unlocking push button of the transmitter, and releases the latched state of the door opening/closing lever of the electric lock body with the output of the receiver. In the wireless electric lock that enables the lock to be unlocked, a first releasing means automatically releases the unlockable state of the electric lock body after a predetermined period of time has elapsed after the electric lock body becomes the unlockable state; and a second unlocking means that releases the unlockable state of the electric lock body when the electric lock body is unlocked by operating a lever on the electric lock body within a predetermined unlockable period. Tablet.