JPH0223667B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a radio wave type lock/unlock device that receives a code signal transmitted from a transmitter and performs a key unlocking operation. More specifically, various keys installed in the vehicle can be unlocked by simply operating a switch by a person carrying a transmitter.
The present invention also relates to a radio-controlled locking/unlocking device that saves energy in its transmitter.

(Prior art) In recent years, in order to prevent mechanical key plates from being left behind in the vehicle interior or the powder being lost, the key cannot be unlocked and the door cannot be opened.
A keyboard-type door opening device as disclosed in Publication No. 54-103199 has been proposed. An example of this will be explained based on FIG.

In the figure, a keyboard type code input device 1
0 is a device provided, for example, near the outside handle of a vehicle door, and is used by an occupant or the like to input a code using his or her finger. The code input by the input device 10 and the registration code recorded in the registration code recording circuit 50 are compared by the code matching circuit 40, and if the two match, the actuator 60 is activated.
This causes the door to be unlocked.

However, in the above example, each time the lock is unlocked,
It is necessary to operate the keyboard 10, and the operation is sometimes complicated.
I had to memorize the correct code to input when operating 0.

In order to eliminate the complexity of this operation and the need for code memorization, for example, by applying the technology of the transmitting/receiving system disclosed in U.S. Pat. No. 4,162,448, as shown in FIG. It is also conceivable that the key could be unlocked using radio waves from the door.
This system first uses a transmitter 70 by a vehicle occupant or the like.
from the antenna 71 of this transmitter 70,
A radio wave modulated with a code signal is transmitted, the code signal is received by a receiving antenna 11 provided in the vehicle, and this code signal is amplified, demodulated, etc. by a receiver 30. After that, the same operation as shown in FIG. 1 is performed. That is, if the input code and the registered code match through code verification, the actuator 60 is activated to unlock the door.

(Problem to be Solved by the Invention) However, since the actuator 60 is used to unlock only the door key, other keys such as the trunk, glove box, etc., may be unlocked. In order to do this, if three actuators 60 are provided and the other members are one, and code verification is performed, all actuators will operate and all keys will be unlocked, and the desired result will be obtained. It is not possible to operate only the key. Therefore, in order to unlock the desired key, it is necessary to
0, code verification circuit 40, registration code recording circuit 5
0. It is necessary to provide as many sets of actuators 60 as there are keys, which has the drawback of increasing cost and installation space.

On the other hand, in terms of operability, in order to eliminate the disadvantages of the keyboard-type door opening device described above, even if a transmitter is used in place of the keyboard, the transmitter will not be able to output the registered code. Some kind of operation is required, and it has not yet been possible to unlock the door with a simple operation.

The present invention has been made in view of the above-mentioned circumstances, and is inexpensive and compact, and at the same time eliminates the complexity of unlocking operations, and also enables efficient use of the power of the portable transmitter used. The purpose of this invention is to provide a radio wave type locking/unlocking device.

[Structure of the Invention] (Means for Solving the Problems) The present invention for achieving the above object includes switches 20a to 20e that set keys 65a to 65e provided in a vehicle to a ready state for operation, and the switches 20a to 20e.
A transmission request signal transmitting circuit 30r that transmits a transmission request signal in response to the outputs of a to 20e.
and a receiver 70 that receives the transmission request signal.
r and a transmitter 70 that outputs a code signal when receiving the transmission request signal; and a portable transmitting means 71 provided in the vehicle and corresponding to the switches 20a to 20e.
Antennas 12a to 12 that receive code signals from
e, a receiver 30 for receiving code signals received by the antennas 12a to 12e, a storage means 50 for storing codes registered in advance, and a code stored in the storage means 50 and a receiver 30 for receiving the code signals. The actuators 60a to 60e actuate the keys 65a to 65e, and the switches 20a to 20e are set to an operation ready state based on the verification results of the verification means 40. Actuator 60a
Gate means 41a to 41e for operating ~60e
It is characterized by the following.

(Function) The radio wave locking/unlocking device of the present invention configured as described above functions as follows.

First, when the passenger holding the transmitter 70 operates the switch 20a provided on the vehicle while getting on the vehicle,
A transmission request signal is output from the transmission request signal transmission circuit 30r, and the transmission means 71 outputs a code signal when receiving this transmission request signal. This code signal is input to receiver 30 via antenna 12a. And verification means 4
0 compares the code signal output from the receiver 30 with the code stored in the storage means 50, and if both codes match, actuates the actuator 60a via the gate means 41a and switches the switch. Unlock the key 65a corresponding to the key 20a.

Therefore, the receiver 30 and storage means 5 described above
0 and the verification means 40 are shared, the device becomes small and inexpensive. In addition, when unlocking a vehicle, the passenger can do so simply by operating the switch corresponding to the key they wish to unlock, so they can easily unlock the vehicle with that key. can be done. Furthermore, the transmitting means 71
Since it operates only when the transmission request signal is output from the transmission request signal transmission circuit 30r, that is, when the switch is operated, the power consumption of the transmission means 71 can be reduced.

(Example) The present invention will be described in detail below based on an example shown in the accompanying drawings. FIG. 3 is a circuit diagram showing one embodiment of the present invention.

First, to explain the configuration, each of the loop-shaped receiving antennas 12a to 12e is connected to a changeover switch 13.
It is connected to the receiver 30 and the transmission request signal transmission circuit 30r via a to 13e. Further, selection switches 20a to 20e are provided corresponding to the respective receiving antennas 12a to 12e, and when the selection switches 20a to 20e are actuated, timers 21a to 21a output a sufficient time to receive a signal from the transmitter. 21e are provided respectively. The changeover switches 13a to 13e are turned on while the respective timers 21a to 21e are outputting. This changeover switch 13a
.about.13e are provided to prevent so-called interference, and to prevent noise from entering from receiving antennas other than the receiving antennas selected by the selection switches 20a to 20e. Also timer 21
The outputs of a to 21e are connected to the respective AND gates 41
Connected to one input terminal of a to 41e, this
When the AND gates 41a to 41e output, the actuators 60a to 60e that operate the keys 65a to 65e are activated. Locks 66a-66e whose operations are regulated by the respective keys are connected to the keys 65a-65e. Further, as shown in the figure, each key is mechanically connected to its own actuator. Here, the key or lock is assumed to be the following part in this embodiment. In other words, taking a door key as an example, the key regulates the movement of the latch in conjunction with the operation of the inside lock knob or key cylinder provided on the outer panel of the door, and the latch follows the operation of the inside door handle, etc. It has a function to prevent this from happening. More specifically, it is the part that locks or unlocks the mechanical part (lock described later) that holds the door in the closed position when the door is closed. When the door is locked, the inside handle or the door outside handle is locked. Even if the door is operated, the latch and striker remain engaged to prevent the door from opening, and when the door is unlocked, the latch is rotated by operating the inside handle or the door outside handle to open the door. This allows the door to be opened and closed freely. In addition, a lock has the function of keeping the door closed by the engagement between the latch and the striker when the door is closed, and the function of locking the door by moving the latch in conjunction with the operation of the inside handle or door outside handle. It has the function of disengaging the engagement and releasing the above-mentioned closed state. And the actuator is what activates this key,
In this embodiment, the aforementioned lock is unlocked by operating the actuator, and the door can be opened and closed freely by operating the inside handle or the door outside handle.

Further, the output terminals of the timers 21a to 21e are connected to the input terminal of the OR gate 22. The power supply circuit 23 is configured to apply the power supply voltage to the receiver 30 and the transmission request signal transmission circuit 30r only when the OR gate 22 is outputting. And transmission request signal transmission circuit 30r
is supplied with voltage from the power supply circuit 23,
Transmission request signals are sent from antennas 12a to 12e via changeover switches 13a to 13e. Further, the transmission request signal receiving circuit 70r constituting the transmitting means operates to cause the transmitter 70 to perform the original transmission when receiving the transmission request signal from the antenna 72. Output terminals 40a to 40 of code verification circuit 40
e is connected to the other input terminal of each AND gate 41a to 41e.

From the above configuration, the receiving antenna 12a, the changeover switch 13a, the selection switch 20a, the timer 2
1a, AND gate 41a, actuator 60
A circuit a for the driver's side door is formed by a,
Similarly, a passenger side door circuit b, a trunk circuit c, a glove box circuit d, and a steering circuit e are formed. Furthermore, each member used in those circuits has the same lowercase letter as the corresponding circuit at the end. Therefore, actuators 60b, 60c, 60
d and 60e are keys 65 for the passenger side door, respectively.
b, for unlocking the trunk key 65c, for unlocking the glove box key 65d,
This is for unlocking the steering key 65e.

Note that the driver's side door key 65a, the passenger's side door key 65b, the trunk key 65c, the glove box key 65d, and the steering key 65e are keys provided on the driver's side door. Let us refer to the key provided on the door on the seat side, the key provided in the trunk, the key provided in the glow box, and the key provided on the steering wheel.

The keyboard 42 is also used to register a new code in the storage circuit 50 via the code matching circuit 40.

On the other hand, the loop-shaped transmission antenna 72 receives the transmission request signal output from the transmission request signal transmission circuit 70r, and also receives the transmission request signal from the transmitter 70.
If the transmitter 70 uses an LSI and an ultra-small battery, the overall shape of the transmitter 70 can be reduced.
Therefore, rings, bracelets, necklaces,
It can be incorporated into accessories such as brooches and watches, and can also be used as the transmitting antenna 72.

The selection switches 20a to 20e correspond to the keys 65a to 65a.
In order to allow the 65e to perform the unlock operation, it is preferable to place it near the member operated by the user, for example, the fourth
As shown in the figure, the selection switch 20a for unlocking the driver's side door is preferably installed on a part of the doorknob 81 of the driver's side door 80. Further, a mechanical key hole 82 is attached in order to allow common use with a conventional mechanical key.

Next, the operation of the above embodiment will be explained. In the initial state, since the transmitter 70 has not yet transmitted a code signal, the power consumption in the transmitter 70 is zero. In addition, the receiving antenna 12a~
15e does not receive the transmission code signal from the transmission antenna 72, no verification is performed in the code verification circuit 40. Therefore, since the output terminals 40a to 40e are not outputting,
AND gates 41a to 41e do not output. Therefore, none of the actuators 60a to 60e operates, and no unlocking operation is performed with any of the keys. Therefore, all locks 66a to 66e are in a locked state.

Here, a case will be described in which the driver's seat side door key 65a is used to perform an unlocking operation. First, the transmitting antenna 72 is placed close to the receiving antenna 12a, and the selection switch 20a is activated. Timer 2 is activated for a certain period of time from when the selection switch 20a is activated.
1a outputs, so during that time the selector switch 13
a closes. Then, voltage is applied from the power supply circuit 23 to the receiver 30 and the transmission request signal transmission circuit 30r only for a certain period of time determined by the timer 21a. As a result, the transmission request signal transmission circuit 3
0r outputs a transmission request signal, and the transmission request signal is sent to the transmission request signal receiving circuit 70r via the changeover switch 13a, the antenna 12a, and the antenna 72. By this,
Receiver 70 transmits a code signal for the first time. Then, the code signal received by the receiving antenna 12a is input to the receiver 30, and after the input signal is amplified and demodulated, it is sent to the code matching circuit 40.

If the input code, which is the output signal of the receiver 30, matches the registration code, outputs appear at the output terminals 40a to 40e in accordance with the input. At this time, for example, if the output terminal 40a outputs an output, the timer 21a is still outputting, so the AND gate 41a also generates an output, thereby actuating the actuator 60a and unlocking the driver's side door key 65a. An unlocking operation is performed. Therefore,
The driver's side door lock 66a is unlocked,
This means that the driver's side door can be opened in conjunction with the passenger's operation of the outside door handle.

To explain the unlocking operation of the driver's side door key 65a based on an actual operation, an occupant with this transmitter in his or her pocket approaches the door to be unlocked (the transmitting antenna 72 is antenna 12
a), press the selection switch 20a installed on a part of the doorknob 81 shown in FIG. With just this operation, receiver 3
0 and the transmitter 70 automatically function, the above-described unlocking operation is performed, and the driver's side door key 65a is unlocked.

Next, the case where the trunk key key 65c is unlocked will be explained. First, the transmitting antenna 72,
The antenna is brought close to one of the receiving antennas 12a to 12e, and the selection switch 12c is activated. The timer 21c outputs an output for a certain period of time after the switch is activated. Therefore, since the changeover switch 13c is closed, a transmission request signal is output from the transmission request signal transmission circuit 30r, and the transmission request receiving circuit 70r that receives this signal operates the transmitter 70, and the transmitter 70 transmits the code signal. Output. The receiver 30 then amplifies and demodulates this input signal. It is assumed that the code that is the output signal is verified by the verification circuit 40, and a signal is output to the output terminal 40c. As a result, the AND gate 41c outputs an output, so the actuator 60
c is activated and the trunk key 65 is linked to it.
c is unlocked.

By the way, although the transmitter 70 is shown as one for convenience, the content of the code to be transmitted differs depending on the type of transmitter 70. As shown in FIG. 3A, for example, when transmitters 701 and 702 are used, the output terminal 40 of the code verification circuit 40
All of a to 40e output. However, when the transmitter 705 is used, the code matching circuit 40
The terminals other than the output terminal 40d output. Therefore, in this case, since the AND gate 41d does not produce an output, even if the selection switch 20d is operated, the actuator 60d is not operated and the glow box key 65d linked thereto is not unlocked. Conversely, when transmitter 705 is used, the third
As shown in Figure A, the glove box key 65d
For keys other than the above, the unlocking operation is performed on the condition that the selection switch is activated. Transmitter 703, 704, 706
Similarly, the keys that can be used to unlock the door are limited.

In this way, the transmitters 701 and 702 can be used as master keys to unlock all the keys, and the other transmitters 703 to 706 can be configured to unlock the keys according to their purpose. There are a limited number of keys that can be used. This function will be referred to as a permission function here. By providing this permission function, it becomes convenient for existing locks that can only be unlocked with a specific key.

Note that the fact that the output terminal 40f in FIG. 3A is 1 means that the code can be deleted from the registration using the keyboard 42. Therefore, the code in which 40f in FIG. 3A is 0 cannot be erased even by using the keyboard 42.

Further, the OR gate 22 is provided to achieve energy saving. In other words, only when attempting to unlock the key, the OR gate 22
, the power supply voltage is applied to the receiver 30 only at that time. However, when there is no need for the key to perform an unlocking operation, the OR gate 22 does not output any output, so no power supply voltage is applied to the receiver 30, so there is no wasted power consumption. In this way, energy savings are being achieved.

Further, as described above, the changeover switches 13a to
13e is provided to prevent so-called interference. For example, the changeover switch 13
It is assumed that a to 13e are not provided. In this case, as mentioned above, if noise enters from another receiving antenna, such as the antenna 12b, when the driver's side door key 65a is used to unlock the door, then the normal code from the antenna 12a and the noise from the antenna 12b enter the code matching circuit 40 via the receiver 30 at the same time. As a result, the code matching circuit 40 cannot perform normal matching. To prevent this, a changeover switch 13 is installed after each receiving antenna.
a to 13e are provided so that even if the antenna receives signals using another receiving antenna, the changeover switch of that antenna will not be turned on, so that the input signal will not enter there. In the above case, instead of the noise entering from the receiving antenna 12b, the receiving antenna 12b
Interference will also occur if another transmitting antenna is placed close to the antenna. In this case as well, the changeover switch 13a
By using .about.13e, such interference can be prevented.

As described above, the embodiment shown in FIG.
Since the key can be made to perform the unlocking operation simply by activating either one of e, the unlocking operation of the key is easy. Furthermore, since only one receiver 30, one code verification circuit 40, and one registration code recording circuit 50 are required, the entire device becomes cheaper. Furthermore, the transmitter 70 and the receiver 30 have selection switches 20a to 20.
Since it is designed to function when any one of 0e is operated, energy saving can be achieved.

Further, the actuator 60e is used to cause the steering key 65e to perform an unlocking operation, and may also be used as a function switch for starting the engine.

Furthermore, the code verification circuit 40, the registration code recording circuit 50, the AND gate 41e, and the actuator 60e may be housed in a security case. By doing this, the vehicle will not be activated even if any electrical signal other than a normal code signal is applied from outside the security case, so it is possible to reliably prevent vehicle theft.

In addition, in the above embodiment, the actuator 60
Although the a to 60e have been described as being used for key unlocking operations, they can also be used for other uses such as power seat drive, radio set, air conditioner set, etc.
It may also be used for mirror set.

Further, in the above embodiment, a plurality of actuators are selectively operated, but the present invention is not limited to this. For example, an actuator may be used to unlock only the door on the driver's seat side. Of course, the present invention can also be applied to a device equipped with one actuator.

[Effects of the Invention] As explained above, according to the radio wave type locking/unlocking device of the present invention, since the receiver, storage means, and checking means are shared, the entire device can be provided in a small size and at low cost. Moreover, the unlocking operation of a key can be performed simply by operating a switch provided corresponding to the key, so that the unlocking operation can be performed with a simple operation. Furthermore, since the transmitter and receiver only function for a certain period of time after the switch is operated, energy savings can be achieved.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a conventional keyboard type door opening device, Fig. 2 is a block diagram showing a conventional radio wave type key system, Fig. 3 is a circuit diagram showing an embodiment of the present invention, and Fig. 3A The figure is a table for explaining the operation of the code matching circuit, and FIG. 4 is a diagram showing an example of a door used in the present invention. a... Driver side door circuit, b... Passenger side door circuit, c... Trunk circuit, d... Glove box circuit, e... Steering circuit, 12a-1
2e...Receiving antenna (antenna), 13a to 13
e...Changing switch, 20a-20e...Selection switch (switch), 21a-21e...Timer, 3
0r...Transmission request signal transmission circuit, 40...Code verification circuit (verification means), 41a to 41e...AND
Gate (gate means), 50... Registration code recording circuit (memory means), 60a to 60e... Actuator, 65a... Driver's side door key (key), 65b...
Passenger side door key (key), 65c...Trunk key (key), 65d...Glove box key (key), 6
5e...Steering key (key), 70...Transmitter,
70r...transmission request signal receiving circuit (receiver),
71... Transmission means, 72... Transmission antenna.

Claims (1)

[Scope of Claims] 1. Switches 20a to 20e that set keys 65a to 65e provided in the vehicle to a ready state for operation, and a transmission request signal transmitter that transmits a transmission request signal in response to the output of the switches 20a to 20e. a circuit 30r; and a receiver 70r that receives the transmission request signal.
and a transmitter 70 that outputs a code signal when receiving the transmission request signal; and a portable transmitter 71 that is provided in the vehicle and that transmits the switches 20a to 2.
Antennas 12a to 12e that receive code signals from the transmitting means 71 corresponding to 0e, a receiver 30 that receives the code signals received by the antennas 12a to 12e, and a storage means 50 that stores pre-registered codes. A verification means 40 that verifies the code stored in the storage means 50 and the code signal received by the receiver 30; Actuators 60a to 60e that actuate the keys 65a to 65e; Verification results of the verification means 40 A control device for a radio key, comprising gate means 41a to 41e, which actuate actuators 60a to 60e set to an operation ready state by the switches 20a to 20e based on the above. 2 The transmission request signal transmission circuit 30r includes:
2. The radio key control device according to claim 1, wherein a transmission request signal is transmitted via antennas 12a to 12e provided in the vehicle corresponding to the switches 20a to 20e.