JPS6012766Y2 - Safety device for automobile steering lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for preventing an automobile steering lock device from accidentally locking a steering shaft while the vehicle is running.

In conventional steering lock devices for automobiles, the key inserted into the rotor of the cylinder lock is turned from the drive position to the stop position, and when the key is pulled out of the rotor, the lock shaft protrudes and locks into the steering shaft. When engaged, the steering shaft cannot be rotated, and these operations can be performed regardless of whether the vehicle is moving or stopped.

Therefore, if the key is pulled out against the driver's intention due to erroneous operation or mischief while the vehicle is in motion, the steering shaft will be locked, making it impossible to operate the vehicle and potentially causing a serious accident.

In view of the above drawbacks, the present invention uses an electromagnet controlled by a switch (sensor) that responds to running or stopping the vehicle to hold the lock shaft in the retracted position while the vehicle is running, even if the key is pulled out of the rotor. This is a safety device for a steering lock device that prevents the steering shaft from being locked, and will be explained below based on the drawings.

Figure 1 shows an embodiment of the present invention, in which the key inserted into the rotor of the cylinder lock is turned from the running position to the stop position while the vehicle is running, and the key is pulled out from the rotor. A cylinder lock outer 2 is fitted and fixed, a rotor 3 is rotatably fitted to the outer 2, and the rotor key is rotatably disposed near the insertion opening and interlocks with insertion and removal of the key into the rotor 3. An actuator 4, a locking lever 5 that is pivotally supported by the outer 2 and rotated clockwise by the actuator 4, a spring 6 that always urges the locking lever 5 in a counterclockwise direction, and a steering shaft (not shown) that engages with a steering shaft (not shown) when extended. A lock shaft 7 that prevents rotation of the steering shaft, and a tip 5 of the locking lever 5 when the lock shaft 7 is in the retracted position.
An engagement groove 7a provided in the lock shaft 7 to engage with the lock shaft 7a and hold the lock shaft 7 in the retracted position, and when the key is rotated from the stop position to the running position, the lock shaft rotates integrally with the rotor 3. A cam 8 that moves the locking lever 7 from the extended position to the retracted position is energized by a switch (sensor) that responds to the running or stopped state of the vehicle while the vehicle is running, and moves the head 5a of the locking lever 5 against the elastic force of the spring 6. It consists of an electromagnet 9 that attracts and holds the housing 1, and an ignition switch (not shown) that is attached to the housing 1 and rotated by a cam 8.

The operation of this embodiment configured as described above is such that when the key, which is inserted into the rotor 3 and is in the running position, is turned to the stop position and pulled out from the rotor 3, the electromagnet 9 is not energized when the vehicle is stopped. Therefore, the locking lever 5 rotates counterclockwise due to the elastic force of the spring 6, and the tip 5b of the locking lever 5 escapes from the engagement groove 7a of the lock shaft 7, and the lock shaft 7 protrudes to lock the steering shaft. When the vehicle is running, the electromagnet 9 is energized and attracts and holds the head 5a of the locking lever 5 against the elastic force of the spring 6, so that the locking lever does not fit into the locking groove 7a of the lock shaft 7. 5, the lock shaft 7 is held in the retracted position, and accidental locking of the steering shaft can be reliably prevented.

Further, at a position where the locking lever 5 is rotated clockwise by the actuator 4, that is, at a position where the head 5a of the locking lever 5 is close to the electromagnet 9, the head 5a of the locking lever 5 is attracted and held by the electromagnet 9. Since the attraction force of the electromagnet 9 can be small, power consumption can be reduced. Furthermore, when the battery is stopped and the battery is not being charged, the electromagnet 9 is not excited and does not consume power.

FIG. 2 shows another embodiment of the present invention, in which the head 5a, which is one end of the locking lever 5, cannot be attracted and held by a single magnetic force, and the core 10 is made to have as strong a magnetic force as possible.
A permanent magnet 10b is arranged between the permanent magnets 10a and 10b, and is set to be energized while the vehicle is running, and to have the same polarity as the permanent magnet 10a, and to work together with the permanent magnet 10b to attract and hold the head 5a of the locking lever. An electromagnet 10 having an electromagnetic coil 10c is placed facing the locking lever 5 in the same manner as in the embodiment described above, and the operation is exactly the same as in the embodiment described above, and the power consumption of the electromagnet is reduced compared to that in the embodiment described above. I can do it.

As explained above, according to the present invention, while the vehicle is running, the electromagnet is energized and attracts and holds one end of the locking lever, maintains the locking lever tip in the locking groove of the lock shaft, and retracts the lock shaft. Since the steering lock is held in position, accidental locking of the steering lock can be reliably prevented.

In addition, because one end of the locking lever is attracted and held in a position close to the electromagnet, the attraction force of the electromagnet is small and power consumption is low.Furthermore, when the battery is stopped and the battery is not being charged, the electromagnet is closed. Since it is not excited, it has the advantage of not consuming power.

Furthermore, as mentioned above, since one end of the locking lever is directly made part of the magnetic circuit, other parts are unnecessary, and the device can be made lighter and smaller.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a main part of one embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of a main part of another embodiment. 5; Locking lever, 7; Lock shaft, 9.10
; Electromagnet, 10b; Permanent magnet.

Claims (1)

[Scope of utility model registration request] When the key is turned from the drive position to the stop position, the locking lever remains engaged with the lock shaft, locking the lock shaft in the retracted position, and when the key is pulled out from the rotor of the cylinder lock in the stop position. In a steering lock device in which the locking lever rotates by the elastic force of a spring and disengages from the lock shaft, the lock shaft protrudes and engages with the steering shaft to prevent rotation of the steering shaft, A sensor that responds to whether the vehicle is running or stopped excites an electromagnet while the vehicle is running to attract and hold one end of the locking lever, thereby maintaining engagement of the locking lever with the lock shaft while the vehicle is running. A safety device for a steering lock device characterized by: