JP3352185B2 - Vehicle locking / unlocking control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking and unlocking operation of a vehicle in which a locking mechanism disposed on a door or the like of the vehicle is locked or unlocked in accordance with a control signal transmitted to the vehicle. It relates to a control device.

[0002]

2. Description of the Related Art A control signal is transmitted from outside a vehicle using a portable transmitter without locking or unlocking a door locking mechanism provided in a vehicle by operating a key inserted into the locking mechanism. By doing
A lock mechanism control system called a keyless entry system or the like has been proposed. A lock mechanism control system in such a vehicle is generally a small-sized portable transmission that transmits a signal obtained by modulating a predetermined carrier signal based on coded control data as an unlocking control signal. Machine, and receives the locking / unlocking control signal transmitted from the transmitter, demodulates the received locking / unlocking control signal, reproduces the coded control data, and reproduces the content of the control data. And a locking / unlocking control device for locking or unlocking the door locking mechanism accordingly.

Accordingly, the locking / unlocking control device is provided with a receiving antenna means for receiving the locking / unlocking control signal from the transmitter. As such receiving antenna means,
Several forms are conceivable, for example,
Japanese Patent Publication No. 78 describes that the antenna is formed by a loop antenna disposed in a window of a vehicle. Then, under the condition that the radiated electric field strength of the lock / unlock control signal of the transmitter is substantially constant, the position of the transmitter at which the operation of effectively operating the lock / unlock control device by transmitting the lock / unlock control signal can be performed. The range, that is, the effective operation range of the locking and unlocking control device is set according to the reception performance of the receiving antenna means provided in the locking and unlocking control device.

A transmitter for transmitting a locking / unlocking control signal to a locking / unlocking control device normally operates using a battery having a relatively small volume as a power source. For example, a vehicle provided with the locking / unlocking control device is provided. Carried by the user. Then, when the user gets on / off the vehicle, the locking / unlocking control device performs an operation of setting the locking mechanism of the vehicle to the unlocked state before getting on the vehicle, or the locking / unlocking control device performs the locking of the vehicle after getting off. An operation is performed to perform an operation of locking the mechanism.

[0005]

The transmitter constituting the lock mechanism control system in the vehicle as described above is provided in the vehicle so as to constitute a lock mechanism control system together with the transmitter in order to facilitate its handling. Transmitting an unlocking control signal for causing the locking / unlocking control device to perform an operation of setting the vehicle locking mechanism to the unlocked state, and causing the locking / unlocking control device to perform an operation of setting the locking mechanism of the vehicle to the locking state. Each of the transmission of the locking / unlocking control signal is easily performed by, for example, pressing one of the operation buttons. However, the transmission operation of the locking / unlocking control signal is easily performed as described above, but the operation button for transmitting the locking / unlocking control signal is operated against the intention of the user or the like. This is likely to cause an erroneous operation to be performed.

Therefore, for example, a state in which the user who gets off the vehicle operates the transmitter to transmit the locking / unlocking control signal for causing the locking / unlocking control device to perform the operation of setting the locking mechanism of the vehicle to the locked state. After that, when the transmitter is still within the valid operation range of the locking / unlocking control device, the transmitter is unknowingly operated by the locking / unlocking control device to put the lock mechanism of the vehicle into the unlocked state. A situation in which the operation of transmitting the locking / unlocking control signal for performing the operation is erroneously performed is likely to occur. When such a situation occurs, the locking mechanism of the vehicle, which should be locked in the user's consciousness, is actually placed in an undesirable unlocked state, and the vehicle is stolen. This may lead to inconveniences such as.

In order to avoid such inconvenience, the effective operation range of the locking and unlocking control device is narrowed, and for example, the transmitter carried by the user of the vehicle is within the effective operation range of the locking and unlocking control device. Reducing the situation, thereby, even if an erroneous operation is performed on the transmitter, the transmitter will be out of the effective operation range for the locking and unlocking control device at that time, and the locking and unlocking control device will not operate effectively, It is conceivable to do so. However, in such a case, in order to reliably operate the lock / unlock control device, it is required to perform a transmission operation on the transmitter while the transmitter is close to the receiving antenna means of the lock / unlock control device. Results. Therefore, for example, when the vehicle user performs a transmission operation on the transmitter in order to cause the locking / unlocking control device to perform an operation of bringing the locking mechanism of the vehicle into the unlocked state prior to boarding, the reception of the transmitter is performed. Although it is thought that there is not much trouble in approaching the antenna means, the user of the vehicle causes the locking / unlocking control device to perform an operation of setting the locking mechanism of the vehicle to the locked state after getting off the vehicle. Therefore, when performing a transmission operation on the transmitter, it is troublesome to be required to bring the transmitter close to the receiving antenna means because of the situation of being away from the vehicle.

In view of the above, the present invention includes an antenna unit provided in a vehicle for receiving an unlocking control signal transmitted from a transmitter, and based on the unlocking control signal received through the antenna unit, Under the assumption that locking / unlocking of the lock mechanism in the vehicle is performed, the lock mechanism may be undesirably unlocked due to erroneous operation of the transmitter without causing additional trouble in normal operation of the transmitter. An object of the present invention is to provide a vehicle locking and unlocking control device that can effectively reduce the occurrence of a situation in which the vehicle is locked.

[0009]

In order to achieve the above object, a vehicle locking / unlocking control apparatus according to the present invention comprises: an antenna means for receiving a locking / unlocking control signal transmitted to a vehicle; based on the unlocking control signal received through the antenna unit, in addition to the lock mechanism driving means take the locked state and the unlocked state selectively to lock mechanism of the vehicle, facilities
It is composed of an unlocking operation section,
The lower limit of the signal field strength at which an effective reception output can be obtained,
Chi, the lower limit value of the effective received signal field strength of the antenna means,
When the lock mechanism is in the unlocked state, the antenna has a smaller antenna reception characteristic control means than when the lock mechanism is in the locked state ,
The locking / unlocking operation unit constituting the antenna reception characteristic control means,
Built-in antenna means, connected to the lock mechanism, the body of the vehicle
When the lock mechanism is in the unlocked state, the lock mechanism
But Ru is assumed to be higher than the one which is in the locked state.

[0010]

[0011]

In the vehicle locking / unlocking control apparatus according to the present invention, the locking mechanism is in the unlocked state.
Of the lock mechanism is longer than when the lock mechanism is in the locked state.
When the locking / unlocking operation unit is placed in a state where
The effective received signal field strength of the effective lower limit value of the received signal field strength, the antenna means lock mechanism is incorporated in the locking and unlocking operation unit in Moto in the locked state of the antenna means built in locking and unlocking operation unit And therefore the effective operating range when the lock mechanism is unlocked is expanded compared to the effective operating range when the lock mechanism is locked. It is said. Therefore, the lock mechanism is in the locked state, facilities
A state in which the unlocking operation part has a relatively small projecting length from the vehicle body
Under such circumstances, the lower limit value of the effective reception signal electric field strength of the antenna means incorporated in the locking / unlocking operation unit is set to a relatively large value, whereby the effective operation range is relatively narrow. As a result, the transmission operation to the transmitter while the lock mechanism is in the locked state, that is, the transmission operation in which the lock / unlock control signal for causing the lock mechanism to take the unlocked state is transmitted. Is required to be performed when the transmitter is relatively close to the antenna means, and the occurrence of a situation where the lock mechanism is undesirably unlocked due to erroneous operation of the transmitter is effectively reduced. Will be done.

[0012] Moreover, the lower limit value of the effective received signal field strength of the antenna means in Moto the lock mechanism is in the locked state is set to a relatively large, whereby the effective operation range is a relatively narrow On the other hand , the lower limit of the effective reception signal electric field strength of the antenna means when the lock mechanism is in the unlocked state is relatively small, whereby the effective operation range is relatively wide. Therefore, the transmission operation to the transmitter when the lock mechanism is in the unlocked state, that is, the transmission operation in which the lock / unlock control signal for causing the lock mechanism to take the lock state is transmitted by the transmitter It does not need to be performed relatively close to the antenna means, so that no extra trouble is required in operating the transmitter to make the locking mechanism locked.

[0013]

FIG. 4 shows an example of a vehicle locking / unlocking control device according to the present invention, together with a lock mechanism and a transmitter in a vehicle.

In FIG. 4, a transmitter 10 is operated by using a small dry battery as a power source. For example, a vehicle to which a locking / unlocking control device 15 which is an example of a vehicle locking / unlocking control device according to the present invention is applied. Is carried and used by users. When the transmitter 10 is in the operating state, the transmitter / receiver transmits, for example, an unlocking / unlocking control signal SC obtained by amplitude-modulating a carrier signal having a frequency of 300 to 400 MHz based on encoded control data. Send through 11. The control data selectively includes locking data that instructs the locking mechanism in the vehicle to take the locked state and unlocking data that instructs the locking mechanism in the vehicle to take the unlocked state. The locking / unlocking control signal SC obtained by the modulation based on the control data including the control data causes the locking / unlocking control device 15 to perform an operation for setting the locking mechanism in the vehicle to the locked state. The locking / unlocking control signal SC obtained by the modulation based on the data causes the locking / unlocking control device 15 to perform an operation for bringing the locking mechanism of the vehicle into the unlocked state.

The locking / unlocking control signal SC transmitted from the transmitter 10 through the transmitting antenna 11 is transmitted to the locking / unlocking control device 15 on condition that the transmitter 10 is within the effective operation range of the locking / unlocking control device 15. Receiving antenna 1
6 and a tuning unit 17 connected to the receiving antenna 16. The tuning unit 17 is tuned in advance to the carrier signal frequency of the locking / unlocking control signal SC. Then, the received locking / unlocking control signal SC obtained from the tuning unit 17 is amplified by the high frequency amplification unit 18 and supplied to the frequency conversion unit 19. The local oscillation signal SO from the local oscillation unit 20 is also supplied to the frequency conversion unit 19, and the locking / unlocking control signal S
The frequency conversion according to the local oscillation signal SO for C is performed, and the intermediate frequency signal SI based on the locking / unlocking control signal SC is obtained.
Is formed.

The intermediate frequency signal SI obtained from the frequency conversion unit 19 is supplied to a demodulation unit 22 via an intermediate frequency amplification unit 21. In the demodulation unit 22, demodulation is performed on the intermediate frequency signal SI which is an amplitude modulation signal, and a demodulation output signal SD corresponding to control data including lock data or control data including unlock data is obtained. Demodulation unit 2
2 is supplied to the signal processing unit 23, where the demodulated output signal S
D is subjected to various processes, control data including the lock data or control data including the unlock data is reproduced, and further, the locking operation drive signal SL based on the control data including the reproduced lock data, or An unlocking operation drive signal SU is formed based on the control data including the reproduced unlock data.

The intermediate frequency signal SI supplied from the frequency converter 19 to the intermediate frequency amplifier 21 is also supplied to the level detector 28. The level detector 28 performs envelope detection on the intermediate frequency signal SI, and obtains a level detection output signal SV having a level corresponding to the envelope detection output on the intermediate frequency signal SI.
This level detection output signal SV is the level of the intermediate frequency signal SI obtained from the frequency converter 19,
7 has a level corresponding to the level of the received unlocking / unlocking control signal SC.

Then, the level detection output signal SV is supplied to a level comparing section 29.
A level comparison is performed between the level detection output signal SV and a reference voltage SVR having a predetermined level from the reference voltage source 30, and a comparison output signal SS is obtained from the level comparison unit 29. This comparison output signal SS is, for example,
When the level of the level detection output signal SV is equal to or higher than the predetermined level of the reference voltage SVR, the level is high, and when the level of the level detection output signal SV is lower than the predetermined level of the reference voltage SVR, the low level is set. It shall be taken.

The predetermined level taken by the reference voltage SVR is determined by the locking / unlocking control signal SC transmitted when the transmitter 10 is located at the outer edge of the effective operation range of the locking / unlocking control device 15. When received by the receiving antenna 16 and the tuning unit 17, the level is set to be equal to the level of the level detection output signal SV obtained from the level detection unit 28. Therefore, the locking / unlocking control signal SC transmitted when the transmitter 10 is within the effective operation range of the locking / unlocking control device 15 is transmitted to the receiving antenna 16 and the tuning unit 1.
7, the comparison output signal SS obtained from the level comparison unit 29 has a high level, and the transmitter 10 transmits under the condition that the transmitter 10 is out of the effective operation range of the locking / unlocking control device 15. When the performed unlocking control signal SC is received by the receiving antenna 16 and the tuning unit 17, the comparison output signal SS obtained from the level comparing unit 29 has a low level.

In this way, the comparison output signal SS obtained from the level comparing section 29 is supplied to the signal processing section 23 as a control signal for the signal. When the comparison output signal SS has a high level, the signal processing unit 23 to which the comparison output signal SS is supplied takes a normal signal processing operation state and takes the above-described locking operation drive signal SL or unlock. An operation drive signal SU is formed, and the comparison output signal S
When S has a low level, the lock operation drive signal S does not take a normal signal processing operation state and the lock operation drive signal S
L or the unlocking operation drive signal SU is not formed.

The lock operation drive signal SL or the unlock operation drive signal SU formed under the condition that the signal processing section 23 assumes a normal signal processing operation state is supplied from the signal processing section 23 to the lock control section 24. You. At this time, the locking operation drive signal S
L is supplied to a lock drive unit 25 in the lock control unit 24, and the unlocking operation drive signal SU is supplied to an unlock drive unit 26 in the lock control unit 24. The lock drive unit 25 to which the lock operation drive signal SL is supplied drives the lock mechanism 27 in the vehicle according to the lock operation drive signal SL, and causes the lock mechanism 27 to assume the locked state. The unlocking drive unit 26 to which the unlocking operation drive signal SU is supplied drives the lock mechanism 27 in the vehicle in accordance with the unlocking operation drive signal SU,
The lock mechanism 27 is brought to the unlocked state.

The locking / unlocking control device 1 configured as described above
As shown in FIG. 3, the receiving antenna 16 is provided such that the receiving antenna 16 is incorporated in a door locking / unlocking operation unit 36 provided on an inner surface side of a door 35 constituting a part of the vehicle body of the vehicle. The door 35 is provided with a lock mechanism 27, and has a built-in lock control unit 24 including a lock drive unit 25 and an unlock drive unit 26 for driving the lock mechanism 27. The door locking / unlocking operation unit 36 can move up and down with respect to the door 35 with the built-in receiving antenna 16, and selectively takes an upper position and a lower position. . The lower part of the door locking / unlocking operation unit 36 is connected to the locking mechanism 27 via the locking control unit 24, and when the lifting operation is performed to take the upper position, the locking / unlocking operation unit 36 is unlocked. While being able to take the lock state,
When the push-down operation is performed to assume the lower position, the lock mechanism 27 can be in the locked state, and when the lock mechanism 27 is driven by the lock drive unit 25 to be in the locked state, When the lock mechanism 27 is driven by the unlocking drive unit 26 to be in the unlocked state, the lock mechanism 27 assumes the upper position in conjunction with it.

Other parts of the locking / unlocking control device 15 except for the receiving antenna 16 and the lock control unit 24 are an electric circuit disposed inside an instrument panel unit 37 forming a front end portion in a vehicle compartment forming unit of the vehicle. It is stored in block 38. The electric circuit block 38 is electrically connected to the receiving antenna 16 built in the door locking / unlocking operation unit 36 and the lock drive unit 25 and the unlock drive unit 26 in the lock control unit 24 built in the door 35. ing.

The door locking / unlocking operation section 36 incorporating the receiving antenna 16 is set to an upper position as shown in FIG. 1 and to a lower position as shown in FIG. In some cases, the upward protruding length from the door 35 is different, and the upward protruding length from the door 35 under the condition that the upper position is assumed as shown in FIG. As shown in FIG. 2, the length of the protrusion from the door 35 in the lower position is larger than that of the door 35. Along with this, the receiving antenna 16 built in the door locking / unlocking operation unit 36 also moves from the door 35 when the door locking / unlocking operation unit 36 assumes the upper position as shown in FIG. The upwardly projecting length is larger than the upwardly projecting length from the door 35 when the door locking / unlocking operation section 36 is assumed to be at the lower position as shown in FIG.

The door 35 is formed of a conductive material not only on the outer surface but also on the inner surface thereof. Therefore, the receiving antenna 16 built in the door locking / unlocking operation section 36 is made of a conductive material. Will be surrounded by The ground electrode side of the receiving antenna 16 is connected to a conductive member 35 ′ forming the door 35. Therefore, as shown in FIG. 1, the receiving antenna 16 placed in the upper position with the door locking / unlocking operation unit 36 in the upper position, equivalently, as shown in FIG. With the ground electrode side surrounded by a conductive member 35 ′ forming the connected door 35, the conductive member 35 ′ is projected from the inside of the conductive member 35 ′ to the outside with a relatively large protrusion length. And the effective conductor length La as an antenna takes a relatively large value LL, and as shown in FIG. 2, it takes a lower position with the door locking / unlocking operation unit 36 taking a lower position. The receiving antenna 16 in the state is equivalently surrounded by a conductive member 35 'forming a door 35 to which the ground electrode side is connected, as shown in FIG. From within The antenna is projected to the outside with a relatively small projection length, and the effective conductor length La as an antenna has a relatively small value LU.

From the viewpoint of considering the antenna characteristics, such a receiving antenna 16 can be considered as a small dipole antenna. When a small dipole antenna is used as a receiving antenna for receiving a predetermined signal, the larger the effective length is, the larger the effective signal output signal electric field strength is, that is, the lower limit of the effective received signal electric field strength. The value will be small. Therefore, in the case of the receiving antenna 16 described above, the lower limit of the effective received signal electric field strength for the unlocking control signal SC transmitted from the transmitter 10 through the transmitting antenna 11 is, as shown in FIG. When the effective conductor length La takes a relatively large value LL, as shown in FIG. 6, the effective conductor length La as the antenna takes a relatively small value LU. Would be smaller. That is, the transmission antenna 1 is transmitted from the transmitter 10.
The lower limit value of the effective reception signal electric field strength of the reception antenna 16 for the lock / unlock control signal SC transmitted through
6 will be in an upper position.
When the locking mechanism 27 is in the unlocked state, the door locking / unlocking operation unit 36 is in a state where the door locking / unlocking operation unit 36 takes a lower position with the receiving antenna 16 incorporated therein. The locking mechanism 27 is in the locked state. It is smaller than the case.

The lower limit of the effective reception signal electric field strength of the reception antenna 16 determines the effective operation range of the locking / unlocking control device 15 in accordance with the lower limit, and the lower limit of the effective reception signal electric field strength of the reception antenna 16 is smaller. , Locking and unlocking control device 15
The effective operation range for is expanded. Therefore, the effective operation range of the lock / unlock control device 15 is such that the lower limit value of the effective reception signal electric field strength of the receiving antenna 16 is such that the lock mechanism 27 is in the unlocked state when the lock mechanism 27 is in the unlocked state. The lock mechanism 2
When the lock 7 is in the unlocked state, the lock mechanism 27 is larger than when the lock mechanism 27 is in the locked state.

As described above, when the lock mechanism 27 is in the locked state, the receiving antenna 16 is operated by the door locking / unlocking operation unit 36.
And the lock mechanism 27
Is in the unlocked state, the receiving antenna 16 is assumed to be in the upper position with the door locking / unlocking operation unit 36, so that the locking and unlocking in the case where the lock mechanism 27 is in the unlocked state is performed. Effective operation range of the control device 15 and the locking / unlocking control device 1 in a case where the lock mechanism 27 is in a locked state.
The effective operation range for the lock / unlock control device 15 when the lock mechanism 27 is in the unlocked state is indicated by the range AL and the range AU in FIG. AL) is wider than the effective operation range (range AU) of the lock / unlock control device 15 when the lock mechanism 27 is in the locked state, and the lock mechanism 27
Is in the locked state, the effective operation range (range AU) of the locking and unlocking control device 15 is included. Then, the lower limit value of the effective reception signal electric field strength of the receiving antenna 16 when the lock mechanism 27 is in the locked state is set to a relatively large value, whereby the case where the lock mechanism 27 is in the locked state is set. The effective operation range (range AU) of the locking / unlocking control device 15 is set to be relatively narrow. That is, the door locking / unlocking operation
The unit 36 constitutes an antenna reception characteristic control unit.
It is.

Under the circumstances, when the lock mechanism 27 is in the locked state, the transmitter 10 causes the locking and unlocking control device 15 to perform an operation for bringing the lock mechanism 27 into the unlocked state through the transmission antenna 11. When the locking / unlocking control signal SC is transmitted, the transmitter 10 sets the range A in FIG.
Only when it is within the effective operation range of the locking / unlocking control device 15 which is relatively narrow as indicated by U, the signal processing unit 23 in the locking / unlocking control device 15 takes a normal signal processing operation state. Drive signal SU for unlocking operation
, Whereby the locking mechanism 27 is unlocked by the unlocking drive 26 and the transmitter 10 is relatively small, as indicated by the range AU in FIG. When it is out of the effective operation range for the lock 15, the lock mechanism 27 is not shifted to the unlocked state. Therefore, it is necessary for the transmitter 10 to perform a transmission operation for causing the lock mechanism 27 to take the unlocked state while the transmitter 10 is relatively close to the receiving antenna 16. Lock mechanism 2 due to erroneous operation
The occurrence of the situation where the lock 7 is undesirably unlocked is reduced.

On the other hand, when the lock mechanism 27 is in the unlocked state,
When the locking / unlocking control signal SC is transmitted from the transmitter 10 through the transmitting antenna 11 to cause the locking / unlocking control device 15 to perform an operation for bringing the locking mechanism 27 into the locked state, the transmitter 10 If the signal processing unit 23 in the locking and unlocking control device 15 is within the effective operation range of the locking and unlocking control device 15 which is relatively wide as indicated by the range AL in FIG. To generate a locking operation drive signal SL, whereby the locking mechanism 27 is locked by the locking drive unit 25. Accordingly, it is not necessary for the transmitter 10 to perform a transmission operation for causing the lock mechanism 27 to assume the locked state when the transmitter 10 is relatively close to the receiving antenna 16. In the operation of the transmitter 10 for causing the mechanism 27 to assume the locked state, no particular inconvenience is imposed.

In the above example, the receiving antenna 16 is built in the door locking / unlocking operation unit 36 and moves with the door locking / unlocking operation unit 36. Does not necessarily need to be built in the door locking / unlocking operation unit 36, but is something other than the door locking / unlocking operation unit 36, and is connected to the lock mechanism 27, and the length of the protrusion from the vehicle body of the vehicle is Lock mechanism 2 when unlocked
7 may be provided on a member that is larger than in the locked state.

[0032]

As is apparent from the above description, in the vehicle locking and unlocking control device according to the present invention, the effective reception signal electric field strength of the antenna means when the locking mechanism in the vehicle is in the unlocked state. Is smaller than the lower limit of the effective reception signal electric field strength of the antenna means when the lock mechanism is in the locked state, and therefore, the effective operation range when the lock mechanism is in the unlocked state. However, since the effective operating range when the lock mechanism is in the locked state is expanded, the lower limit of the effective reception signal electric field strength of the antenna means when the lock mechanism is in the locked state is considered. the value is set to a relatively large, it thereto by, the effective operation range is a relatively narrow
You. Therefore , the transmission operation to the transmitter while the lock mechanism is in the locked state, that is, the transmission operation to cause the lock mechanism to release the unlock state to the transmitter is performed by making the transmitter relatively close to the antenna means. In this case, it is necessary to perform the operation under the condition that the lock mechanism is undesirably unlocked due to an erroneous operation on the transmitter.

[0033] Moreover, while the lock mechanism is as relatively narrow effective operating range in the Moto in the locked state, than Moto the lock mechanism is in the unlocked state, the effective received signal electric field of the antenna means The lower limit of intensity is relatively small,
Since the effective operation range is relatively wide, the transmission operation to the transmitter when the lock mechanism is in the unlocked state, that is, the transmission for making the lock mechanism to the transmitter take the locked state. The operation is not required to be performed under the condition that the transmitter is relatively close to the antenna means, and therefore, the operation of the transmitter for causing the locking mechanism to be in the locked state is not particularly troublesome. I will not be hurt.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining an arrangement position of a receiving antenna in an example of a vehicle locking / unlocking control device according to the present invention.

FIG. 2 is a perspective view for explaining an arrangement position of a receiving antenna in an example of a vehicle locking / unlocking control device according to the present invention.

FIG. 3 is a perspective view showing a portion of a vehicle to which an example of the vehicle locking and unlocking control device according to the present invention is applied;

FIG. 4 shows an example of a vehicle locking and unlocking control device according to the present invention.
FIG. 2 is a block diagram showing a lock mechanism and a transmitter in the vehicle.

FIG. 5 is a conceptual diagram equivalently showing a state of a receiving antenna in an example of a vehicle locking / unlocking control device according to the present invention.

FIG. 6 is a conceptual diagram equivalently showing a state of a receiving antenna in an example of a vehicle locking / unlocking control device according to the present invention.

FIG. 7 is a plan view for explaining the operation of an example of the vehicle locking and unlocking control device according to the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 10 transmitter 11 transmission antenna 15 locking / unlocking control device 16 receiving antenna 17 tuning unit 19 frequency conversion unit 21 intermediate frequency amplification unit 22 demodulation unit 23 signal processing unit 24 lock control unit 25 lock drive unit 26 unlock drive unit 27 lock mechanism 28 level detector 29 the level comparing section 30 reference voltage source 35 door 36 door unlocking operation unit 38 electrical circuit block

Claims (2)

(57) [Claims] An antenna means for receiving a locking / unlocking control signal transmitted to a vehicle, and a locking state of a locking mechanism in the vehicle based on the locking / unlocking control signal received through the antenna means. Locking mechanism driving means for selectively taking the unlocked state, and a lower limit value of the effective reception signal electric field strength of the antenna means ,
When the lock mechanism is in the unlocked state, the antenna reception characteristic control means is smaller than when the lock mechanism is in the locked state, and the antenna reception characteristic control means includes the antenna means.
Built-in and connected to the lock mechanism, from the body of the vehicle
If the lock length is in the unlocked state, the lock
The locking / unlocking operation unit is larger than when the structure is in the locked state.
A locking and unlocking control device for a vehicle. 2. The locking / unlocking operation section includes an antenna means .
And installed on the inner surface side of the vehicle door
The lock mechanism is connected to the
Projection from the door in conjunction with the operation to shift to the locked state
The lock mechanism is released from the locked state to the unlocked state.
The protruding length from the above door increases in conjunction with the movement to
2. The locking / unlocking control device for a vehicle according to claim 1, wherein the locking / unlocking operation unit is a door locking / unlocking operation unit .