JP3203077B2 - Keyless entry 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 keyless entry device capable of locking and unlocking a vehicle door in a keyless manner, and more particularly to a keyless entry device for rewriting a security code used for the lock / unlock control. About.

[0002]

2. Description of the Related Art Conventionally, as a keyless entry device of this type, for example, when a driver operates a button of a transmitter, a radio wave having a predetermined code is transmitted, and the code is stored in a specific password code in advance. The door is locked / unlocked when it matches.

If the driver loses the transmitter, the door may be unlocked by a third party using the lost transmitter, and the vehicle may be stolen. , It is necessary to change to a code different from the security code at the time of loss. As a method of changing the password, there is a method as disclosed in Japanese Patent Publication No. 3-76077, for example.

In this system, a password rewriting switch is provided on the receiver side (in the vehicle), and when the switch is turned on, the receiving side is in a mode for writing a security code. When a new code is received, the code at this time is written as a new personal identification code and stored.

[0005]

However, in order to change the personal identification code, a dedicated switch such as the above-mentioned personal identification code rewriting switch is required, which increases the cost. In the present invention, the personal identification code can be changed without using such a dedicated switch.

[0006]

In order to solve the above problems, the present invention provides a transmitting means for transmitting a predetermined code, a receiving means for receiving a code from the transmitting means, and a receiving means for receiving a code from the transmitting means. A keyless entry device that controls locking and unlocking of a vehicle door when the received code matches a previously stored code. Of the ignition switch, the door courtesy switch that detects the opening and closing of the door, and the lock / unlock switch that detects the lock / unlock state of the door,
Among the at least one switch means, there are provided a plurality of operation conditions which are satisfied by a predetermined operation of each of the switch means, and one of the plurality of operation conditions is selected by operating the switch means. A condition setting means for detecting an operation state of the switch means, the detection result satisfying an operation condition indicating that the operation is the operation selected by the condition setting means, and a code transmitted from the transmission means at this time. And control means for storing the code as a new password when the reception means detects that the code has been received. A transmitting means for transmitting a predetermined code; a receiving means for receiving a code from the transmitting means; comparing the code received by the receiving means with a pre-stored password; In the keyless entry device that controls locking and unlocking of the vehicle door when the code matches a code stored in advance, an ignition switch provided on the vehicle, a door courtesy switch for detecting opening and closing of the door, and a lock / unlock state of the door are provided. Detecting the operating state of at least two switch means of the lock / unlock switch for detecting the state of the switch. The detection result indicates that one of the switch means is on.
When an operation condition indicating that a predetermined operation has been performed by another switch means is satisfied, and at this time it is detected that the reception means has received the code transmitted from the transmission means, the code is replaced with a new password. Control means for storing as a code, the control means comprises a plurality of operating conditions comprising a combination of the respective switch operations, the operation of the switch means of the plurality of operating conditions And a condition setting means for selecting one operation condition from the following. Further, transmitting means for transmitting a predetermined code, receiving means for receiving a code from the transmitting means, and comparing the code received by the receiving means with a pre-stored security code, the received code In the keyless entry device for controlling the locking and unlocking of the vehicle door when 一致 matches the code stored in advance, an ignition switch provided on the vehicle, a door courtesy switch for detecting opening and closing of the door, and a lock / unlock state of the door are provided. Of the lock / unlock switch for detecting the operation condition, an operating condition that is satisfied by a predetermined operation of one of the switch means that is operated, and an operation condition that is satisfied by the at least two switch means. While one switch is ON, a predetermined operation is performed by another switch. Condition setting means for selecting one operation condition from the plurality of operation conditions by operating the switch means, and detecting an operation state of the switch means. When the detection result satisfies the operation condition indicating that the operation is the operation selected by the condition setting unit, and when the reception unit detects that the code transmitted from the transmission unit is received at this time, Control means for storing the code as a new personal identification code.

[0007]

According to the present invention, when a predetermined operation is performed on a predetermined switch among an ignition switch, a door courtesy switch for detecting opening / closing of a door, and a lock / unlock switch for detecting a lock / unlock state of a door, a write operation is performed. In this mode, when a code is received from the transmission means, this code is written and stored as a new personal identification code.

Accordingly, in the present invention, the switches originally provided in the vehicle, such as the ignition switch, the door courtesy switch for detecting the opening and closing of the door, and the lock / unlock switch for detecting the locked / unlocked state of the door, are also used as the code code rewriting switch. Since this is done, there is no need to use a special dedicated switch, which is advantageous in terms of cost.

Further, since the rewriting is not performed unless a predetermined operation set in advance in the switch is performed, the encryption code can be easily rewritten only by a driver who recognizes the predetermined operation. be able to. Further, when a predetermined operation is performed by one switch as a predetermined operation by a switch for setting the writing mode, the writing mode can be set in a short time without performing a troublesome operation. When one switch is turned on and another switch is operated in a predetermined manner,
It is possible to reduce the possibility that a third party accidentally matches the operation conditions, and to set the writing mode in a short time despite operating a plurality of switches.

[0010]

1 shows an entire configuration of a keyless door lock control device according to one embodiment of the present invention, wherein 1 is a receiver (ECU) mounted in a vehicle, 11 is a battery power supply, and 13 is a battery power supply. A receiving circuit (receiving means) having an antenna and receiving a radio wave having a predetermined code transmitted from the transmitter 2 is a control state monitoring LED, which is lit to indicate that security (theft prevention) control is being performed. For example, it is displayed on the instrument panel of a vehicle.

[0011] Also, as a switch, in conjunction with the door knob,
A lock / unlock detection switch (for example, turned off in the locked state and turned on in the unlocked state) 14 for detecting whether the door is locked or unlocked, and used for other vehicle control devices such as an air conditioner when turned on. There are an ignition switch (hereinafter, referred to as an IG switch) 12 for turning on the power, and a door courtesy switch 18 (off when the door is closed and on when the door is open) which detects the open / closed state of the door in conjunction with the opening and closing of the door. Is shaped by the input circuit 15 and input to the microcomputer 16. These switches change their connection state (on / off) in conjunction with the operation of door knobs, IG keys, and door operating means. In practice, the driver operates these operating means indirectly. The switch is operated.

The microcomputer 16 has a battery 1
1 is always supplied, and the control operation is always possible. Although not shown, the microcomputer 16 has a central processing unit (CPU), a ROM storing a control program, and an RA storing a personal identification code.
M etc. are included. The CPU normally reads and writes the security code stored in the RAM. However, when the battery 11 is removed, the security code loses power and is erased.
The same security code is also written in. This EEPR
Since the OM 19 is a memory that retains the security code even when the battery 11 (power supply) is removed, there is no concern that the security code is completely erased.

The microcomputer 16 includes a receiving circuit 13
The state of the vehicle is determined on the basis of the code input from the switch and the ON / OFF state of the switch, and a control signal for locking or unlocking the door is output via the output circuit 17. On the other hand, the microcomputer 16 determines whether or not a predetermined operation is performed on the operation means, that is, the switch based on the connection state of the switch, enters a write mode, performs a code writing process, and
A control signal for blinking 1 and a control signal for blinking the parking light (indicating that writing has been completed) are output to the output circuit 17.

Further, the receiver 1 (ECU) is connected to a harness connector 102 in which input signal lines such as switches and output signal lines such as LEDs 101 are uniformly collected. On the other hand, 2 is a transmitter normally owned by the driver and has a battery power source of 2
1. It comprises a transmission circuit 23 for transmitting a radio wave having a predetermined code to the receiver 1, and an iD code generator 24 in which the code is stored in advance. Incidentally, a small antenna is usually attached to the transmission circuit 23 on the transmitter side, respectively.

Next, the basic operation of this keyless entry will be described. When a button (not shown) on the transmitter 2 is pressed, a radio wave having a predetermined code is transmitted from the transmitter. The receiving circuit 13 receives the radio wave via the antenna and detects a code in the radio wave. On the other hand, the microcomputer 16 inputs this code, compares this code with the personal identification code stored in the RAM, and tries to control the lock / unlock of the door when the codes match with each other. Switch 12 off (engine stopped) and door courtesy switch 18 off (door closed)
That is, the door control is not performed unless the condition that the vehicle is parked is satisfied (to prevent the door control from being performed when the vehicle is running).

When the parking condition is satisfied and the received code matches the password, if the lock / unlock detection switch 14 is off (the door is locked), the microcomputer 16 When the detection switch 14 is turned on (the door is unlocked), a control signal for locking the door is output.

Next, the operation of the first embodiment of the present invention will be described with reference to FIG. FIG. 2 is a flowchart showing the operation of the microcomputer 16 according to the first embodiment. In this example, the predetermined operation of the switch described above is I
When the G switch 12 is turned on and off twice within a predetermined time, the microcomputer 16 is set to the write mode.

As shown in FIG. 2, in step S1, the input states of various switches such as the IG switch 12 and the code received by the receiving circuit are fetched, and in the next step S2, the above-described door lock / unlock control is performed. Do. From the next step S3 on, the personal identification code, which is a feature of this example, is written.

First, in step S3, it is determined whether or not the count value indicating the predetermined number of operations of the IG switch 12 is 2. IG switch 12 was turned on twice in the past.
If it has not been turned off, the process proceeds to the next step S4. In this step S4, it is determined whether or not the IG switch 12 is on. At this time, if the IG switch 12 is on, the process proceeds to the next step S5,
It is determined whether or not "1" is set in a flag indicating that the switch 12 has been turned on in the previous processing routine. Therefore, if the IG switch 12 has not been turned on before, the flag is "0" and therefore the step S
Then, in step S6, the counting of the timer 1 is started.

That is, when the IG switch 12 is turned on for the first time, measurement of how long the IG switch 12 is operated in a predetermined manner is started. Then, in the next step S7, the flag is set to "1" and the IG switch 1
2 is turned on, and the process returns to step S1. Thereafter, when the IG switch 12 is turned off, the process proceeds to step S8 according to the determination in step S4, and here, whether the flag is set to "1", that is, whether the IG switch 12 has been turned on in the previous processing routine. Check if. If the IG switch 12 has been turned on in the previous routine, "1" is set to the count value indicating the IG switch predetermined number of operations in step S9.

That is, when the IG switch 12 is turned off from on, the count value is set to "1" and stored in the RAM so as to indicate that this operation state (on to off) has been performed once. After the count-up is performed, the flag is set to “2” in step S10. If the flag is set to "2", the count value does not increase one after another (the process of step S9 is repeated) even if the IG switch 12 is kept turned off.

Thereafter, the IG switch 12 is turned on again (2
If this is the case, the process proceeds from step S4 to step S5. At this time, since the flag is "2", step S6
Does not proceed to step S11, the flag is reset from "2" to "1", indicating that the IG switch 12 has been turned on again. And this IG switch 1
2 is turned on and then turned off (the second on-
(OFF operation), "NO" in step S4, the process proceeds from the next step S8 to S9, and 1 is further added from the previous count value "1". That is, the count value is set to “2” to indicate that the ON / OFF operation of the IG switch 12 has been performed twice.

Thereafter, the process returns to step S1 and further proceeds to step S3. At this time, since the count value is "2", the process proceeds to steps S12 and S13 according to the judgment in step S3. In steps S12 and S13, the flag and the count value are reset, the timer 1 is stopped, and the count value of the timer 1 is stored in the RAM. Next, step S1
In step 4, it is determined whether or not the count value is within 10 seconds, that is, whether or not the operation of turning off the IG switch 12 twice from on to off takes 10 seconds or more. 10 for this operation
If it takes longer than a second, it is determined that the signal is not a signal of rewriting by the driver (owner), and the process returns to step S1 to not set the writing mode.

On the other hand, if this operation is performed within 10 seconds, the operator performs this predetermined operation, recognizes that it is a signal of writing, advances to step S15, and enters the writing mode for the first time. Next, in step S151, the microcomputer 16 outputs a control signal for blinking the LED 101 to the output circuit 17. When the LED 101 starts blinking, the driver can recognize that the security code is being written.

When the predetermined operation of the IG switch 12 (operation condition for starting writing) is satisfied, the timer 2 starts counting in step S16,
Monitor how long it takes to get the code after entering write mode. At this time, if the reception of the code from the transmitter 2 is detected by the driver's operation in step S17, this code is written in the RAM as a new personal identification code in step S18, and this code is also copied to the EEPROM 19.

When the writing of the code is completed, the microcomputer 16 outputs a control signal for blinking the parking light to the output circuit 17 in step S19. By flashing the parking light, the driver can confirm that the writing has been completed. At this time, since the write mode has been completed, L is set at step S21.
The ED 101 is turned off.

If the code is not received in step S17, the process proceeds to step S20, and it is confirmed whether five seconds or more have elapsed since the start of the write mode.
Therefore, if the code is not received within 5 seconds, the write mode is canceled, and the LED 101 is determined in step S21.
Turn off the light. As described above, according to this example, the operation condition for entering the write mode is that the IG switch is turned on and off twice within 10 seconds. Therefore, since a conventional IG switch is used, it is not necessary to use a special switch, thereby preventing an increase in cost. In addition, since the operation method of the IG switch is limited, it is difficult for anyone other than the driver to enter the writing mode.

As another example, the IG switch 12
May be turned on for a few seconds and then turned on and off twice to switch to the write mode. The reason why the condition that the IG switch 12 is turned on for several seconds is added for the following reason. That is, normally, the keyless door lock / unlock control is performed when the IG switch 12 is off. Conversely, IG switch 1
2 being on indicates that an input that is not normal for the lock control has been made. That is, if an operation that is not usual for the keyless lock control is set as the write condition, it is difficult for a third party to understand that this operation is a write condition. Therefore, if such an operation is further added as a writing condition, it becomes more difficult for a third party to set the writing mode than before.

In this embodiment, I is used as a switch means.
Although the G switch 12 has been described, the present invention is not limited to this, and the lock / unlock detection switch 14 and the door courtesy switch 1
8 may be used. Still another example will be described.
In the first embodiment described above, like the IG switch 12,
Although the operating conditions are set by only a single switch, in this example, the operations of a plurality of switches of the IG switch 12, the lock / unlock detection switch 14, and the door courtesy switch 18 are combined and set as the operating condition. By using a plurality of switches in this way, the possibility of accidentally meeting the operation conditions can be reduced.

As a combination, IG switch 12 + lock / unlock detection switch 14, IG switch 1
2 + door courtesy switch 18, lock / unlock detection switch 14 + door courtesy switch 18, IG
Switch 12 + lock / unlock detection switch 14+
The door courtesy switch 18 is four types.
As a preferred example, while the IG switch 12 is on (within 6 seconds), the on / off operation of the door courtesy switch 18 requires three operations.
After that, the writing mode is set. This is shown in FIG. FIG. 3 shows the IG switch 12 and the door courtesy switch 1
9 is a timing chart showing an on / off state of the No. 8;

As shown in FIG. 3, the IG switch 12 is turned on. During this time, the door is opened and closed (ie, the courtesy switch 18 is turned on and off) three times, and the IG switch 12 is turned off. At the time of turning off, the microcomputer 16 determines whether the time from turning on the IG switch 12 to turning it off is within 6 seconds. If it is within 6 seconds, it is determined that the operation is performed by the driver, and the writing mode (LED 101 blinks) is set. If six seconds or more have elapsed, it is determined that the operation is performed by a driver other than the driver, and the writing mode is canceled. By opening and closing the door about three times within six seconds in this manner, it is possible to prevent the child from mischief or the like from easily entering the writing mode (it is difficult for a child to quickly open and close the door).

As a second embodiment, some of the above-mentioned operating conditions can be arbitrarily selected. This selection is made for the following reasons. That is, for example, when the driver loses the transmitter, the password may be changed.However, even if the code is changed, if the third party is aware of the operating conditions for writing, the second code may be used. The code could easily be changed again by three parties and the vehicle could be stolen.

Therefore, if the operating conditions for switching to the write mode can be changed as double prevention means,
Writing becomes impossible only by simply recognizing one operation condition, and it becomes more difficult for a third party to enter the writing mode. More specifically, several types of operation condition determination programs are stored (made into a map) in the ROM of the microcomputer 16, and the operation conditions can be changed by arbitrarily selecting this program, that is, the determination condition. . This change requires the battery 11 to be connected to the receiver (E
CU2), that is, only within a predetermined time from when the harness connector 102 is reconnected.

FIG. 4 is a flowchart of the microcomputer 16 showing this operation. In this case, two types of operation conditions are stored in the ROM, the first of which is a write mode when the IG switch 12 is turned on and off twice, and the second is a state in which the IG switch 12 is turned on. When the door is opened and closed three times at a time (within six seconds), the writing mode is set.

First, when the battery 11 is reconnected and power is supplied, the microcomputer 16 initializes various data in step Q1. At this time, since the password in the RAM has been deleted, the password stored in the EEPROM 19 is transferred to the RAM. Then, in step Q2, the timer 3 for measuring how much it took to change the operation condition is started. In step Q3, the input process of the IG switch 12 is performed (on / off state is detected).
Store in AM. In the next step Q5, it is detected based on the timer 3 whether or not 6 seconds have elapsed since the power supply, and if it does not exceed 6 seconds, the number of on / off times is measured again.

When 6 seconds have elapsed, the process proceeds to step Q6, where R
Based on the total number of times stored in the AM, it is determined whether or not this on / off number is one. If it is one time, it is "1", that is, the subsequent writing process is performed under the first operation condition (step Q8). The subsequent writing process is performed (step Q9). If the on / off operation of the IG switch 12 is not performed or the operation is performed three or more times, the writing process is performed under the operating conditions before the power is supplied (step Q10).

In the subsequent processing, the same processing as the flow shown in FIG. 2 is performed. In this way, by changing not only the security code but also the operating conditions, double protection means can be provided to prevent a third party from rewriting the security code. When making the change, a special IG switch is used, so that no special switch is required.

As described above, in the first embodiment, other examples of the first embodiment, still another example, and the second embodiment, the switches (IG switches, door courtesy switches, IG switches, door courtesy switches, Since a lock / unlock switch) is used, the switch itself is aside, the input circuit, wiring, and the like are completely the same as the conventional configuration in hardware, and can greatly contribute to cost reduction.
Even if a vehicle control switch (for example, a brake switch, a neutral switch, etc.) that is used in addition to the door lock / unlock control is used, it is possible to at least avoid preparing a new switch. Down can be planned. In addition, since the above-mentioned switches are interlocked with the operating means in the vehicle interior, the setting of the writing mode can be performed by operating the operating means while sitting on the seat in the vehicle interior. Can also be improved than before.

[0039]

As described above, according to the present invention, it is possible to write a personal identification code without requiring a write-only switch, and to reduce the cost. Further, it is possible to reduce the possibility of accidentally becoming a write code and to make it difficult for a third party to set a write mode. further,
In any given operation, the writing mode can be set in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of the overall configuration of a keyless entry device of the present invention.

FIG. 2 is a flowchart showing an operation of the microcomputer 16 according to the first embodiment.

FIG. 3 is a timing chart showing an operation of still another example of the first embodiment.

FIG. 4 is a flowchart showing an operation of a microcomputer 16 according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Receiver 2 ... Transmitter 12 ... IG switch 16 ... Microcomputer

Claims (4)

(57) [Claims] A transmitting means for transmitting a predetermined code; a receiving means for receiving a code from the transmitting means; comparing the code received by the receiving means with a pre-stored password; When the entered code matches the pre-stored code, the vehicle door lock
In a keyless entry device for controlling unlocking, a switch comprising at least one of an ignition switch provided on a vehicle, a door courtesy switch for detecting opening / closing of a door, and a lock / unlock switch for detecting a locked / unlocked state of a door. Condition setting means for selecting one of the plurality of operation conditions from the plurality of operation conditions by operating the switch means; and Detecting the operating state of the switch means,
When the detection result satisfies the operation condition indicating that the operation is the operation selected by the condition setting means, and when the reception means detects that the code transmitted from the transmission means at this time is received, the code is changed to A keyless entry device comprising: control means for storing as a new personal identification code. 2. A transmitting means for transmitting a predetermined code, a receiving means for receiving a code from the transmitting means, and comparing the code received by the receiving means with a previously stored password. A keyless entry device for controlling locking / unlocking of a vehicle door when the entered code matches a code stored in advance, an ignition switch provided on the vehicle, a door courtesy switch for detecting opening / closing of a door, and a door lock / lock. An operation state of at least two of the lock / unlock switches for detecting an unlock state is detected, and the detection result is one of the switch means.
While one of the switches is on, the operation condition that indicates that a predetermined operation has been performed by another switch means is satisfied, and when the reception means detects that the code transmitted from the transmission means at this time is received, Control means for storing the code as a new personal identification code. 3. The control means includes a plurality of operation conditions comprising a combination of the respective switch operations, and one of the plurality of operation conditions is operated by operating the switch means.
3. The keyless entry device according to claim 2, further comprising condition setting means for selecting one operation condition. 4. A transmitting means for transmitting a predetermined code, a receiving means for receiving a code from the transmitting means, and comparing the code received by the receiving means with a pre-stored personal identification code. A keyless entry device for controlling locking / unlocking of a vehicle door when the entered code matches a code stored in advance, an ignition switch provided on the vehicle, a door courtesy switch for detecting opening / closing of a door, and a door lock / lock. Among the lock / unlock switches for detecting an unlocked state, an operating condition which is satisfied by a predetermined operation of one of the switch means to be operated, and a switch means comprising the at least two switches While one of the switch means is on, a predetermined operation is performed by another switch means. Condition setting means for providing a plurality of operating conditions including operating conditions satisfied by being performed, and selecting one operating condition from the plurality of operating conditions by operating the switch means; and operating the switch means. Detecting the state, detecting that the detection result satisfies the operation condition indicating that the operation is the operation selected by the condition setting means, and that the reception means has received the code transmitted from the transmission means at this time. Then, a control means for storing the code as a new password is provided.