JPH0441098B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to an ignition switch device for an automobile, in which the cylinder lock is prevented from rotating in the middle of the return rotation to the lock position, and by adding another operation. This invention relates to a safety device for a steering lock device that is rotatable.

<Prior art> In order to prevent the steering shaft from being accidentally locked during driving, a safety device that prevents the key from turning even if the key is simply turned in the locking direction is well known. An example of this structure is introduced in No. 34305.

However, the device described in the above-mentioned publication has a stopper that rotates the rotor or the locking/unlocking rotating member, and also sets the engaging portion at an angle before the rotor advances from the off position to the lock position. A manual member biased so as to protrude into the rotation range of the stopper is provided, and the locking operation of the steering shaft is performed by moving the steering shaft against the bias of the manual member and rotating the rotor etc. to the lock position using a key. It is designed so that the movements must be performed at the same time, making it difficult to operate with one hand and requiring both hands.Furthermore, since the two movements must be performed at the same time, the return operation may fail if the timing is not right. . Although this is desirable for safety, there is another undesirable problem in that it is unnecessarily troublesome and lacks practicality.

Furthermore, after the rotation in the locking direction is prevented, the rotation in the locking direction is made possible once the starter rotates in the direction of the starter position, thereby eliminating the need for the above two behaviors. No. 55-160952. This has a recess formed in the sliding contact area between the body and the rotor, and a specially shaped rocker that swings in response to the rotation of the rotor is placed in this recess. Basically, it is provided so that it can move freely within the recess, so there is a high possibility that its posture or position will change from its original state due to vibration or impact, and it lacks reliability. There seems to be a problem with this.

<Object of the Invention> The present invention focuses on the above-mentioned problems, and provides a highly reliable steering lock device that can reliably prevent accidental locking and that can be rotated back toward the lock position with one hand. This was done for the purpose of providing a safety device.

<Structure of the Invention> In order to achieve the above object, the present invention provides a first ring which is arranged around the outer periphery of the cylinder inner of a cylinder lock and rotates together with the cylinder inner, and an edge on the return rotation side that forms an inclined part. It has an engaging recess on the inner circumference, and is arranged adjacent to the first ring, and rotates together with the first ring when the cylinder inner rotates from the lock position to the starter position, and rotates in the opposite direction of the cylinder inner. a second ring connected to the first ring via a rotation transmission mechanism that does not rotate when the cylinder rotates; At the same time, the base end is biased by a spring so that it comes into sliding contact with the inner peripheral part of the second ring, and when the cylinder inner rotates from the lock position toward the starter position, the base end engages with the engagement recess of the second ring. When the cylinder inner is rotated back toward the lock position, the base end remains engaged with the engagement recess, and from the return rotation blocking position toward the starter position. When the second ring rotates again, the stopper lever is pushed up by the inclined part of the second ring that rotates together with the cylinder inner, and the base end escapes from the engagement recess and swings toward the release side, and the stopper lever rotates together with the cylinder inner. It engages with the tip of the stopper lever that is swung toward the engagement side when rotating back from the on position to the lock position, and prevents the cylinder inner from rotating back, and once from this state toward the starter position. The present invention is characterized in that it includes a stopper piece that enables the return rotation of the cylinder inner without engaging with the tip of the stopper lever when the cylinder inner is rotated back to the lock position after rotation.

<Example> Next, the present invention will be specifically explained with reference to an illustrated example.

In the figure, 1 is a body having a rotary switch portion 2, and 3 is a cylinder inner rotatably supported within the body 1. The body 1, which is the cylinder outer, and the cylinder inner 3 constitute a well-known cylinder lock. ing. Reference numeral 4 denotes a cam that engages with the connecting protrusion 5 of the cylinder inner 3. When the key 6 is inserted into the cylinder inner 3 and rotated, the cam 4 rotates together to prevent the rotation inside the rotary switch section 2. A predetermined opening/closing operation is performed by rotating a child (not shown). Reference numeral 7 designates a mounting portion provided in a direction perpendicular to the axis of the cylinder lock for mounting the body 1 to the steering column; 8 a locking member supported by the mounting portion 7 so as to be movable in the axial direction; The locking member 8 has a base end that engages with the cam 4 and is always urged upward in the figure by a spring 9, and is connected to a key interlocking engagement piece (not shown) that operates in conjunction with the insertion and removal of the key. Movement is thus restricted, and when the key 6 is removed from the lock position, its tip 8a protrudes toward the steering shaft 10, so that the steering shaft 10 is locked.

15 is disposed coaxially on the outer periphery of the cylinder inner 3, and the protrusion 1 of the cylinder inner 3 is inserted into the notch 16.
7 is a first ring that engages and rotates together with the cylinder inner 3; 18 is a second ring that is arranged on the outer periphery of the cylinder inner 3 like the first ring 15, and also overlaps with the first ring 15; It is housed between the cap 19 attached to the end face of the body 1 and the body 1, and the second ring 18 and the body 1 are connected to each other.
The second ring 18 is biased toward the first ring 15 by a coil spring 20 compressed between the second ring 18 and the first ring 15 . An engaging pawl 21 whose counterclockwise side is inclined is provided on the outer circumference of the first ring 15 and protrudes toward the second ring 18 . A plurality of engaging protrusions 22 are provided in a protruding manner corresponding to the engaging claws 21 . Also, the second
A plurality of engagement recesses 23 are provided on the inner circumference of the ring 18, with which stopper levers 25, which will be described later, are engaged. Part 23b
It has an almost rectangular shape.

Reference numeral 25 denotes a stopper lever disposed along the axial direction on the outer circumferential portion of the cylinder inner 3 and supported so as to be swingable about a support shaft 26.
The cam 4 has a base end 27 extending to the inner circumference of the second ring 18 and a distal end 28 extending to the outer circumference of the cam 4. A rotational force is applied to bring the base end 27 into sliding contact.

Reference numeral 31 denotes a stopper piece protruding from the outer circumference of the cam 4, and an engagement step 31a provided on the counterclockwise side engages with the side surface of the tip 28 of the stopper lever 25 in the return rotation blocking position. It is formed at a position that prevents the cylinder inner 3 from rotating back.

In this specification, the lock position refers to the position where the key can be attached and removed from the cylinder lock and the steering shaft 10 can be locked, and the off position refers to the position where the ignition circuit is turned off and the circuit of accessory equipment such as a radio is turned on. The on position is the position where the ignition circuit is turned on, and the starter position is the position where the starter motor circuit is turned on.As is well known, these positions are arranged in order from the lock position in a clockwise direction. The return rotation prevention position is the key 6 from the on position to the lock position.
This is the position where rotation is temporarily blocked when attempting to return the handle, and is located, for example, between the off position and the lock position.

The present embodiment has the above-mentioned configuration, and the operation will be explained next.

FIG. 1 shows a state in which the locking member 8 is in the locked position, with the tip 8a of the locking member 8 protruding and the steering shaft 10 being locked, and the stopper lever 25 with its base end 27 coming out of the engagement recess 23 of the second ring 18. Escaped and rotated clockwise,
In other words, it is in a state of being swung toward the release side.

When the key 6 is inserted and rotated to the starter position, the cylinder inner 3, cam 4, and first ring 15 rotate together, and the second ring 18 also rotates to the first position.
The engagement pawl 21 of the ring 15 engages with the engagement protrusion 22 and is rotated at the same time. At this time, the base end 27 of the stopper lever 25 escapes from the engagement recess 23 of the second ring 18 and swings clockwise, that is, toward the release side, so that the tip 28 is separated from the outer circumference of the cam 4 and the tip 28 The stopper piece 31 does not engage and can be rotated to the starter position without any trouble. The spacing between the engaging recesses 23 is selected so that the adjacent engaging recesses 23 reach the base end 27 in the starter position.
The stopper lever 25 swings toward the engagement side and the tip 28
is in a lowered position and remains in this state even in the on position.

Next, to stop the engine and remove the key,
When the key is turned to rotate the cylinder inner 3 counterclockwise to the lock position, the cam 4 also rotates at the same time, but the second ring 18
The stopper lever 25 does not rotate because it slips on the inclined portion of the engagement pawl 21, and the stopper lever 25 remains swung toward the engagement side.
In this embodiment, the base end 27 of the stopper lever 25 is engaged with the engagement recess 23, and the engagement recess 23 is engaged with the base end 27 of the stopper lever 25.
The base end 27 of the stopper lever 25 is attached to the vertical portion 23b of the
The first ring 15 is stopped because the side surface of the
The engaging pawl 21 is configured to be able to reliably get over the engaging protrusion 22 of the second ring 18. Therefore, the stopper piece 31 engages with the tip 28 of the stopper lever 25 at the return rotation prevention position, and further rotation in the direction of the lock position is once blocked, making it impossible to return continuously from the on position to the lock position. . FIG. 2 shows an exploded perspective view at this return rotation blocking position.

Here, when the key 6 is rotated clockwise again, the engaging claw 21 engages with the engaging protrusion 22 and the second ring 1
8 rotates clockwise, the stopper lever 2
5, the base end 27 slides on the inclined part 23a of the engagement recess 23, escapes from the engagement recess 23, is pushed down and swings to the release side, and the tip 28 rises and engages the stopper piece 31.
It becomes impossible to engage with. So again key 6
When the cam 4 is turned counterclockwise, the rotation is not transmitted from the first ring 15 to the second ring 18, and the stopper lever 25 remains in a state in which it does not engage with the stopper piece 31. Rotation in the counterclockwise direction is now possible, and by turning the key 6, the cylinder inner 3 can be returned to the lock position shown in FIG. 1, and the key 6 can be removed to lock the steering shaft 10.

Returning the key to the lock position as described above requires a two-step operation in which the key is rotated in the opposite direction toward the starter position from the position where rotation was blocked, and then rotated again toward the lock position. It is impossible to turn the key back unless a series of operations are performed, and the risk of accidentally turning the key to the locked position while driving is reliably prevented. In addition, since this series of operations only needs to be performed in sequence, there is no need to adjust the timing and perform them with both hands, making it extremely easy to return to the locked position.

Note that if the stopper lever 25 is configured to swing toward the engagement side in the starter position as in this embodiment, the cylinder inner 3 may be rotated from the lock position to the off position simply to listen to the radio. In such a case, the two-step operation is unnecessary and the lock can be returned to the locked position and rotated.

Note that the first ring 15 and the second ring 18 are
If the first ring 15 rotates in the clockwise direction, the rotation is transmitted to the second ring 18, but the rotation in the counterclockwise direction is not transmitted. It is possible to adopt an appropriate structure other than the one in which the engaging claw and the engaging protrusion are combined using a spring biasing force as in the embodiment.

<Effects of the Invention> As is clear from the description of the above-mentioned embodiments, according to the present invention, the cylinder inner is rotated in the opposite direction once at the return rotation prevention position during the return rotation toward the lock position. By performing this operation, it becomes possible to easily return to the locked position and rotate with one hand while reliably preventing accidental locking. Therefore, the operability is good, and the first and second rings and stopper levers are not affected by vibrations and operate reliably, resulting in high reliability and safety of the highly practical steering lock device. You can get the equipment.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention;
FIG. 2 is an exploded perspective view of the main parts of the same as above. 1...Body, 3...Cylinder inner, 4...
Cam, 6... Key, 8... Locking member, 10
...Steering shaft, 15...First ring, 18...Second ring, 20...Coil spring,
21... Engagement claw, 22... Engagement protrusion, 23... Engagement recess, 23a... Inclined part, 25... Stopper lever, 26... Support shaft, 27... Base end, 28... Tip, 29...spring, 31...stopper piece.

Claims (1)

[Claims] 1. A first ring arranged around the outer periphery of the cylinder inner of the cylinder lock and rotating together with the cylinder inner, and an engagement recess with an inclined edge on the return rotation side on the inner periphery. A rotary ring which is arranged adjacent to the first ring and rotates together with the first ring when the cylinder inner rotates from the lock position to the starter position, but does not rotate when the cylinder inner rotates in the opposite direction. a second ring coupled to the first ring via a transmission mechanism; It is biased by a spring so as to come into sliding contact with the inner circumference, and when the cylinder inner rotates from the lock position toward the starter position, the base end engages with the engagement recess of the second ring and swings toward the engagement side. When the cylinder inner is rotated back toward the lock position, the base end remains engaged with the engagement recess, and when the cylinder inner is rotated again from the return rotation blocking position toward the starter position, it is rotated together with the cylinder inner. A stopper lever that is pushed up by the inclined part of the rotating second ring so that its base end escapes from the engagement recess and swings to the release side; and a stopper lever that is provided to rotate together with the cylinder inner and moves from the on position to the lock position. When the cylinder inner rotates back, it engages with the tip of the stopper lever that has swung toward the engagement side to prevent the return rotation of the cylinder inner. A safety device for a steering lock device, comprising: a stopper piece that enables the return rotation of the cylinder inner without engaging the tip of the stopper lever when the cylinder inner is rotated back to the stopper lever.