JPS59192646A - Keyless steering lock - Google Patents

Abstract

PURPOSE:To avoid a danger of starting travelling when a steering shaft is locked, by energizing an ignition circuit with both outputs of a releasing circuit and a lock-release detecting circuit. CONSTITUTION:When a steering lock is released, AND gate 76 generates the outputs as the Q terminal outputs of RS flip-flops 64, 74, and RS flip-flop 85 is set through OR gate 78, so that an ignition circuit 90 is turned ON while ACC circuit 93 is turned ON through a state buffer 87 and OR gate 91. In this apparatus, the ignition circuit 90 of a start circuit 44 is energized by the presence of both outputs of a releasing circuit 53 for giving the releasing signal to a motor 22 and a lock-release detecting circuit 43 for generating the output in the released condition so that an engine can be run after the steering lock is released to start safely an automobile.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a keyless steering lock that allows the steering lock to be locked and unlocked without a key.

A conventional steering wheel lock is a so-called mechanical lock that can be locked and unlocked by inserting a key into a key hole and rotating it.

In addition, a keyless steering lock is a lock that automatically unlocks and rotates the steering shaft when multiple keys are pressed in a predetermined order, but the ignition circuit is activated separately from such steering lock operations. Therefore, it is extremely dangerous to start driving with the steering shaft locked. An object of the present invention is to eliminate the above-mentioned danger by energizing the ignition circuit with the outputs of both the unlocking circuit and the locking/unlocking detection circuit.

Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 3, the keyless steering lock device according to the present invention has a frame 13 to which a hair ring 12 supporting a steering shaft 10 is fixed. The frame 13 has a cylindrical hole 14, and a bearing 12 is press-fitted into one end thereof and fixed by caulking. frame 1
A guide hole 17 communicating with the cylindrical hole 14 and a housing cavity 15 are formed in the upper part of the housing 3 . A beam rod 16 is fixed to the upper part by caulking, and the inside of the accommodation cavity 15 cannot be tampered with from the outside.

A locking rod 18 and a hanger 19 are movably accommodated in the guide hole 17 so as to be engaged with and disengaged from the groove 11 of the steering shaft 10, and the rod 18 is pushed toward the steering shaft 1θ side by a spring 20 via the hanger 19, but the rotator 21 prevents it from being pressed beyond a predetermined distance.

The shape of the rotator 21 that supports the hanger 19 is similar to that of the motor 2.
In order to ensure a wide locking position range and unlocking position range in consideration of prevention of malfunction due to overrun of the locking position 2, an inverted cam 29 is formed as shown in FIG.

That is, this cam 29 has a rounded top 30 that comes into contact with the hanger 19 when the lock is locked, and a pair of inclined surfaces 31 that extend downward from the top 30.
．． 32 and an arcuate lower surface 33 that comes into contact with the hanger 19 when unlocked, and the inclined surfaces 31 and 32 are approximately 150 degrees to 15 degrees to each other.
It is preferably formed at an angle of approximately 90°. When locked, the hanger 19 protrudes above the reverse cam 29 of the rotator 21 and comes into contact with the top 30 by the spring 20.

The rotator 21 is connected to the output shaft of a motor 22 via a known gear device 23.

For the gear device 23, a shifted gear with a high reduction ratio is used to increase the rotational torque of the rotator 21.

As shown in FIG. 4, in a pair of holes 27 and 28 drilled in the case 24 of the gear device 23, locking and unlocking locks 34 and 35 are arranged facing each other. , one switch 34 has rod 18 connected to hanger 19
and when raised by the motor 22 via the gear device 23,
That is, when the gear device 23 is in the unlocked position, the magnet 25 embedded in the output shaft 36 of the gear device 23 is activated and the unlocked position is detected. Conversely, the other switch 35 is activated by the approach of the Yagnesoto 25 when the motor rotates to the locked position, that is, when the rod 18 is in the locked position, and the locked position is detected.

Although reed switches are shown as the switches 34 and 35 above, other switches such as microsinches may also be used.

The motor 22 is controlled by a keyless steering lock control circuit shown in FIG.

The keyless steering lock control circuit has a plurality of button switches 45. An unlocking signal generating circuit 40, a motor circuit 41 that operates the motor 22, and an unlocking signal generating circuit 4
a jamming prevention circuit 42 that receives the output of 0 and transmits the output to the motor circuit 41, and generates an alarm when the mouth/throat 18 is bitten in the groove 11 of the shaft 10 and the rod 18 does not move to the release position; A lock/unlock detection circuit 43 that detects the position of the output shaft 36 and generates a signal, and a button switch 45 in the lock/unlock detection circuit 43 and the unlock signal generation circuit 40.
A starting circuit 44 that starts the engine with a signal from A, a locking circuit 46 that provides a locking signal to the motor circuit 41 with the output of a button switch 45, and an unlocking signal generating circuit 40.
CC control circuit 47. The jamming prevention circuit 42 includes an unlocking circuit 53 that transmits the output of the unlocking signal generating circuit 40 to the motor circuit 41, and a time period after the output of the unlocking circuit 53 is generated to trigger the unlocking circuit 53 again. It has a timer circuit 54 that provides a signal, and an alarm circuit 55 that is activated by the output of the timer circuit 54.

The unlocking signal generating circuit 40 can use the keyless entry device shown in Japanese Patent Laid-Open No. 105076/1982, so a detailed explanation will be omitted, but to summarize, the output terminals of the plurality of Pokunsui Nochi 45 of the matrix keyboard are compared. It is connected to the circuit 51 and each predetermined gate. When the signals applied to the comparator circuit 51 by pressing each switch notch on the keyboard in a predetermined order match the signal stored in the memory circuit 50, the match signal output circuit 52 from the comparator circuit 51 A match signal is sent to the match signal output circuit 52, and the match signal output circuit 52
Generates an unlock signal. This is applied to the node terminal of the RS flip-flop 60 of the unlocking circuit 53, and the RS flip-flop 60 is set.

The RS flip-flop 60 outputs the latched signal from the Q terminal and supplies it to the one-shot output circuit 61 and the AND gate 70. One shot output circuit 61 generates a one shot pulse and provides a signal to AND gate 62 and OR gate 71.

The other input terminals of the AND gate 62 are AN, which receives the outputs of the reed switch 35, which closes when the steering lock rod 18 is in the locked position, and the reed switch 34, which opens.
The RS flip-flop 74 is reset by the output of the D gate 75. Since the terminal receives the signal, the RS is activated when the lock is locked.
The output of the flip-flop 60 is the one-shot output circuit 6
1 and then passed through an AND gate 62 and an OR gate 63 and applied to the cent terminal of an Rs flip-flop 64. Therefore, the RS flip-flop 64 provides its Q terminal output to the amplifier 66 through the OR gate 65, so that the relay 67 is connected to the a contact point and the motor 22 is operated.

Operation of the motor 22 causes the lot 18 to rise to the unlocked position. At this time, the reed switch 34 is turned on by the magnet 25, and the reed switch 35 is turned off, so the AND gate 73 generates an output, and the RS filter soap 74 is set, so that its Q terminal output becomes AN
It is applied to the inverting input terminal of the D gate 62, and the AN
D gate 76 is provided. At this time, AND Kate 76
(5) Since the Q terminal output from the RS flip-flop 64 is given to the other long terminal, the AND gate 76 provides outputs to the RS flip-flop processors 4 and 56 through OR gates 77 and 79, respectively. Since the reset is performed, each Q terminal output goes to L level, and the counting circuit 57 is cleared and stops counting.

Next, a case will be described in which the alarm circuit 55 is activated when the rod 18 is caught in the groove 11 of the steering shaft 10 and the rod 18 does not move to the unlocked position. As mentioned above, when the RS flip-flop 64 is sent,
The Q terminal output is OR gate 65, AND gate 76
and R37 Risopfurosop56. Therefore R
Since the S flip-flop 56 is turned on and an H level signal is applied to the clear terminal of the counting circuit 57, the counting circuit 57 starts counting clock input pulses after being reset. When the lot 18 does not move to the unlocked position even after a predetermined period of time has elapsed after the start of counting, the alarm circuit 55 is activated by the output of the counting circuit 57.

That is, as shown in FIG. 7, the counting circuit 57 includes a counter 58 that receives the Q terminal output of the RS flip-flop 56 and a clock signal, and AND gates 68 and 69 connected to the output terminals Q1 to Q of this counter 58. The output terminals Q1 to Q5 generate output signals shown in the time chart of FIG. AND gates 68 and 69
receive signals from output terminals Q+ to Q3, respectively, and output terminals Q6 to Q6.
and Qa ratio output is generated, but the difference is that AND gate 69 receives the Q2 output at its inverting input terminal.

AND gate 77 generates a Qc ratio output when receiving the Qe small output Q5 signal.

As shown in FIG. 8, the output terminals Q1 to Q5 generate signals based on the well-known flip-flop operation.
The D gate 68 generates a small QA output about 7 seconds after the counter 58 starts counting, and then again generates a small QA output about 8 seconds later. AND gate 69 generates a small QB output about 5 seconds after the start of counting, and then again about 8 seconds after that, Q++
Generate output. Qc specific output and Qe small output occur at the same time about 21 seconds after the start of counting. As is clear from the above,
Lot 18 after RS flip-flop 64 cents
When the R,S flip-flop 74 does not move to the unlocked position, the reset signal is not generated from the R,S flip-flop 74, so the RS flip-flop 56 maintains the cent state, and the counting circuit 57 counts the clock pulses, and when a predetermined period of time elapses, the reset signal is not generated. QB small output is generated.

The Qe small output occurs after the point at which the motor would normally rotate and move to the unlocked position. For this reason, exclusive O
The buzzer 81 is activated for a certain period of time through the R gate 80, and at the same time, the RS flip-flop 6 is activated through the OR gate 77.
4 is given a reset signal. The buzzer 81 has a function of warning the driver to manually rotate the steering wheel in order to release the rod stuck in the steering shaft from the steering shaft. On the other hand, R
The amplifier 66 is turned off by resetting the S flip-flop 64.
Since the temperature becomes F, the energization of the motor is also stopped.

When further time elapses, the Q6 output is generated from the counting circuit 57, and is output from the RS flip-flop 64 through the OR gate 63.
is sent and a Q terminal output is generated.

Therefore, the motor 22 is energized through the OR gate 65, the amplifier 66, and the relay 67. At this time, the driver rotates the steering wheel, and the grip of the rofud comes off, but
In the circuit shown in Fig. 6, the above operation is repeated twice, and if the rofdo is still not released, the Qe ratio is output at the same time as the Q
C ratio output is generated, Qe ratio output RS flip-flop 64
are reset and the QC outputs are connected to RS flip-flops 56 and 60 through OR gates 79 and 82, respectively.
It will be pointed.

The number of times the alarm circuit 55 is activated and for how long can be freely determined by changing the length of the timing pulse and the gate circuit.

In addition, in the final stage where the QB ratio output and the Qc ratio output are generated simultaneously, the exclusive OR gate 80 does not produce an output, so the buzzer 8
1 does not work.

When the RS flip-flop 156 enters the cent state, the counting circuit 57 is cleared and the counting operation is stopped. When the RS flip-flops 60 and 64 are reset, each Q terminal output becomes L level. Therefore, since the amplifier 66 is turned off, the relay 67 switches from the a contact to the b contact, and both terminals of the motor 22 are short-circuited through the relay, so that the motor stops suddenly due to the braking action.

When the lock is unlocked by the compression rotation of the motor 22, the AND gate 7
The output of 6 is applied to the cent terminal of RS flip-flop 85 through OR gate 78.

In response to this signal, the RS flip-flop 85 outputs the signal from the output terminal Q, and provides the signal to the AND gate 86.3 state buffer 87 and amplifier 88. Amplifier 88 outputs and closes ignition circuit 90. The 3-state buffer 87 outputs an output when there is no output from the AND gate 86, passes through an OR gate 91 and an amplifier 92, and closes an accessory (ACC) circuit 93. The input terminals of the AND gate 86 include an RS flip-flop 85, an engine sensor 94, and a keyboard button switch 45. The engine sensor 94 detects when the engine is running at a rotation speed higher than a predetermined value, and when L1 is at a near stop. ■] It is designed to be.

When the engine is stopped, if any button on the keyboard is pressed after the RS flip-flop 85 is set, the output continues for the duration of the press, and the AND gate 86 outputs,
The sukuk circuit 96 and the resistor short circuit 97 are energized through amplifiers 94 and 95, respectively, and the starter motor rotates to start the engine. At this time, the accessory circuit 93 is turned off by the inverter of the 3-state hardware 87 due to the output of the AND gate 86.

However, once the engine is activated by the AND gate 86, the starter motor will not be driven even if the start button is pressed due to the L output of the engine sensor 94. R to keep the ignition circuit 90 closed
If the S flip-flop 85 is reset due to noise while the car is running, the ignition circuit will open and the engine will stop, which is a very dangerous situation.In order to avoid this situation, an AND gate 7o is provided.

In other words, the AND gate 7o receives the RS sent by the unlock signal.
The output of the flip-flop 60 and the running sensor 98, which generates an output of H when the vehicle is running and stopped, detect unlocking. R.S.
When the flip-flop 74 and the output are both high, it is output.

After unlocking and when driving, the output of the driving sensor 98 is the same as when driving, but it is set to H by the inverter of the AND gate 70, so the AND gate 70 continues to output and sends an output to the cent terminal of the RS Frisopfromp 85. This output signal holds the output of the RS flip-flop 85 stable. In addition to the method described above, the accessory circuit 93 can be closed by pressing the coded keyhole switches 45 in a predetermined order and applying the voltage to the comparator circuit 51, which matches the number stored in the memory circuit 50 and generates a match signal. Output circuit 5
The output of 2 is applied to the cent terminal of RS flip-flop 99. This signal sets the RS flip-flop 99, outputs the signal from the output terminal Q, passes through the OR gate 91 and the amplifier 92, and closes the accessory circuit 93. Therefore, you can listen to the radio etc. without entering the unlock number.

The locking circuit 46 receives the output from the button switch 45.
ND gate 1001. A one-shot circuit 101 triggered by the output of an AND gate 100, this one-shot circuit 101, an RS flip-flop 74, and a running sensor 9
It has an AND gate 102 which receives the output of 8. AND
The output of the gate 102 is given to the set terminal of the RS flip-flop 103, and its Q terminal signal is sent to the AND gate 104. , which is applied to the OR gate 65.

The lock circuit 46 can be activated when the vehicle is stopped and the steering lock is unlocked. That is, when the button switch 45 of a particular 2111i1 is pressed, the AND gate 100 produces an output, and the one-shot circuit 101 gives a signal to the AND gate 10'2. At this time, if the car is stopped, the AND gate 102 is turned on, and the OR gate 82 is turned on and R is turned on.
The S flip-flop 60 is reset, and its Q terminal output becomes L level, and the AND gate 70 is turned off.

At the same time, the signal from the A and ND gate 102 resets the RS flip-flop 85, so its Q terminal output also goes to L level, so the amplifier 88 and AND cable 186 are turned off.
Therefore, amplifiers 94 and 95 become non-conductive. 3 more
The amplifier 92 is turned off through the state buffer 87 and the OR gate 91.

Also, since the signal of the AND gate 102 is applied to the set terminal of the RS flip-flop 103, the RS flip-flop 103 is sent, and its Q terminal output is applied to the set terminal of the RS flip-flop 103.
The signal is applied to D gate 104.

If the engine is stopped at this time, engine sensor 9
4 produces an H level output, AND gate 104 produces an output, and a signal is applied to amplifier 66 through OR gate 65. Therefore, amplifier 66 is turned on, and relay 6
The motor 22 is operated by being connected to the contact point 7A. motor 2
2 rotates, the output shaft rotates clockwise from the unlocked position shown in FIG. 4 to the locked position by an angle of 180° through the gear device 23, and at the 180° position, the magnet 25 turns on the reed switch 35. . Therefore, as shown in FIG. 6, in the locked state, the reed switch 34 is turned off.
Since the read switch 35 is turned on at F, the output of the AND gate 75 is generated, the RS flip-flop 74 is reset, and its Q terminal output is stopped, and the RS flip-flops 10 and 3 are turned on through the OR gate 71. Since it is reset, the Q terminal output stops and the motor 220
Rotation stops. When only the accessory circuit 93 is turned on, if you want to turn it off, turn on the ignition circuit 9.
0 can be turned OFF by pressing either one of the two keyboard button switches 45.

That is, when this button switch 45 is pressed, the RS flip-flop 99 is activated through the OR gates 105 and 106.
is reset and its Q terminal output stops, so OR
Amplifier 92 becomes non-conductive through gate 91. R
The reset terminal of the S flip-flop 99 receives the Q output signal of the RS flip-flop 60 through the OR gate 106.
This is to clearly notify the driver of the warning sound. After unlocking, the RS flip-flop 103 is turned on as described above, so that the amplifier 92 is made conductive through the 3-state buffer 87 and the OR gate 91. However, when the scooter circuit 96 is activated, the 3-state software 87 is
The state becomes FF.

To explain the operation of the illustrated device, when the driver presses a plurality of button switches 45 in a predetermined order on a key fob fixed to a door panel of a car or a dash board inside the car, the output is stored in a comparator circuit 51. 5o, and if all the digits match, the match signal output circuit 52 outputs an output, and the RS flip-flop 62 is sent. At this time, although the RS flip-flop 74 is in the locked state, the Q terminal output does not occur, so the RS flip-flop 6o. The terminal output passes through a one-shot output circuit 61, an AND gate 62, and an OR gate 63, and sets an RS flip-flop 64.

(Be sure to OR with the Q terminal output of RS flip-prop 64.
The motor 22 operates through the gate 65 and the relay 67,
The gear device 23, the output shaft 36, and the rotator 21 rotate to move the loft 18 together with the hanger 19 from the locked position to the unlocked position against the force of the hanger spring 20. Although a unidirectional rotating motor 22 is used, it will be understood that a reversible motor can also be used.

In the unlocked position, the output shaft 36 is moved 18 to the position shown in FIG.
Since it rotates by an angle of 0°, the reed switch 35 is set to O.
It becomes FF, and the reed switch 34 turns ON. Therefore, in FIG. 6, the output of the AND gate 73 sets the RS flip-flop 74, and its Q terminal output is sent to the inverting input terminal of the AND gate 62.
Since it is a FF, RS flip-flop 6 due to noise
''' 4 malfunction is prevented.RS
It is sent to each reset terminal of flip-flops 64 and 56, which are reset.

When the rofd 18 gets stuck in the groove of the steering shaft and does not unlock, as mentioned above, the QB small output, twice activates the alarm circuit 55, and the Qe small output twice RS flimp float is sent to operate the motor 22, but still. If the Rondo bit is not released, the Qe small output RS flip-flops 56 and 60 are reset, and the third Qe small output RS flip-flop 64 is reset, so the driver presses the button switch 45 again in the predetermined order. Must.

When the steering lock is unlocked as described above, the Q@output AND gate 76 of the RS flip-flops 64 and 74 produces an output, and the RS flip-flop 85 is sent through the OR gate 78, so the ignition circuit 90 is turned on. At the same time, state buffer 87 and O
The ACC circuit 93 is turned on through the R gate 91.

Then, when a predetermined button switch 45 is pressed, AND
Gate 86 is turned on, scooter circuit 96 and register short circuit 97 are brought into conduction, and at the same time, three-state buffer 87 is temporarily turned off and accessory circuit 93 is turned off. When the engine is running, the engine sensor 94
becomes L level and AND gates 86 and 104 are turned OFF, so that the starter circuit 96 is turned OFF and at the same time, the state buffer 87 is turned ON and the accessory circuit 93 is turned OFF.
is energized, and malfunction of the motor 22 due to noise is prevented. Furthermore, while driving, the output of the driving sensor 98 is at the L level, and since the RS flip-flop 60 is in a state of
Since the set signal is continuously applied to the S flip-flop 85, the ignition circuit 90 will not be turned off while the vehicle is running.

When locking the steering shaft after stopping the vehicle,
When two specific button switches 45 are pressed simultaneously,
A signal is applied to AND gate 102 through ND gate 100 and one-shot circuit 101, so that AND gate 102 produces an output. Therefore, the Q terminal output of the RS flip-flop 60 is stopped through the OR gate 82.

Further, the output of the AND game 102 is applied to the reset terminal of the RS flip and flop 85, and its Q terminal output is stopped, so that the ignition circuit 9° and the accessory circuit 93 are turned off.

As mentioned above, when the ignition circuit 9o is turned off, the engine automatically stops operating.

This causes the engine sensor 94 to output an H level. Since the output of the AND gate 102 is given to the set terminal of the R, S flip-flop 103, the output of the AND gate 104 is
gives a signal to the motor circuit 41 through the OR gate 65 to operate the motor 22. The rotation of the motor 22 causes the exit shaft 36 to rotate 18° clockwise from the unlocked position shown in FIG. Therefore, the reed switch 34 is turned OFF, and conversely, the reed switch 35 is turned ON when the magnet 25 approaches. Therefore, AND gate 75 produces an output RS flip 1
Pflosops 74 and 103 are put into a reset state. At the same time, the rotator 21 rotates to the locked position shown in FIG. 5, the hanger 19 and rod 18 are pressed by the spring 20, and the rod 18 is moved to the locked position where it can engage with the groove 11 of the steering shaft.

As mentioned above, in the keyless steering lock of the present invention, when there is an output from both the unlocking circuit 53 which gives an unlocking signal to the motor 22 and the locking/unlocking detection circuit 43 which generates an output in the unlocked state, the starting circuit 44 Since the ignition circuit 90 is energized, the engine can be operated after the steering lock is unlocked, and an automobile equipped with a keyless steering lock can be started safely. If necessary, a signal may be applied to the AND gate 86 to detect that the transmission is in the neutral or park state.

[Brief explanation of drawings]

Figure 1 shows the steering lock according to the present invention.
Sectional view, Figure 2. Plane view with the beam removed, Figure 3.
The figure is a sectional view of the bearing part, Figure 4 is a sectional view taken along line A-A in Figure 2, Figure 5 is a side view of the rotator, Figure 6 is a steering lock and ignition circuit control circuit diagram, and Figure 7 is a counter. A detailed diagram of the circuit, FIG. 8, shows a time chart of the counting circuit. 43...Lock/unlock detection circuit, 44...Start circuit, 53...Unlock circuit.

Claims (1)

[Claims] In a keyless steering lock having a motor disposed in a frame, a loft moved by the motor via an intermediate power transmission means and engaging the steering shaft in a locked position, and a control circuit for controlling the operation of the motor, the control The circuit includes an unlocking circuit that provides an unlocking signal to the motor, and a starting circuit that energizes the ignition circuit, and the starting circuit activates the ignition circuit when there are both outputs from the unlocking circuit and the locking/unlocking detection circuit. A keyless steering lock characterized by being energized.