JPH08216837A - Interlock mechanism of ignition key - Google Patents

Abstract

PURPOSE: To constitute an interlock mechanism by using a solenoid device to absorb a manufacturing error, etc., of a camshaft and a lock lever and with a small stroke of a plunger by way of providing a mechanism to regulate & displacement area by the plunger of the lock lever. CONSTITUTION: When a solenoid device 50 is in an electrified state, a lock lever 40 is oscillated to an engagement position against a return spring S by a plunger 54 driven by electromagnetic attraction force generated between the plunger 54 and a core 53 and held. As a result, rotation of a camshaft 30 to a locking position is restricted by the lock lever 40, and rotation of an ignition key 23 from an ACC position to a LOCK position is restricted. In the meantime, the lock lever 40 is assembled on a housing 10 through a lever support shaft 60 to regulate a displacement area by the plunger 54. Thereafter, a manufacturing error and an assembly error of the camshaft 30, the lock lever 40, etc., are absorbed by regulating a rotational position of the lever support shaft 60 against the housing 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition key interlock mechanism used, for example, in an automobile.

[0002]

2. Description of the Related Art An interlocking mechanism for an ignition key is disclosed in, for example, Japanese Patent Publication No. 53-45573, and as one example thereof, a cam rotatably assembled in a housing and rotated by the ignition key. The camshaft is swingably attached to the housing and is rocked to the locking position, and the camshaft is locked to the lock position and is rocked to the release position. A lock lever that allows the lock lever to rotate to the lock position, and a solenoid device that has a plunger that engages with the lock lever and swings the lock lever from the release position to the locking position and from the locking position to the releasing position. Is disclosed.

[0003]

In the interlock mechanism including the above-mentioned camshaft, lock lever, solenoid device, etc., the swing amount of the lock lever is determined by the stroke (movement amount) of the plunger in the solenoid device. However, if the stroke of the plunger is insufficient, the lock lever does not swing properly, so the stroke of the plunger is set large considering the manufacturing error and the assembly error of the cam shaft, the lock lever, and the like.

By the way, when the stroke of the plunger is set to be large in the solenoid device, a large electromagnetic attraction force must be applied to the plunger in the initial stage of operation when the plunger is actuated by the electromagnetic attraction force. It is necessary to increase the size of the solenoid device or increase the energizing current. The present invention has been made to address the above-described problems, and an object thereof is to provide an interlock mechanism that can be implemented by using a solenoid device having a small stroke of a plunger.

[0005]

In order to achieve the above-mentioned object, in the present invention, a cam shaft rotatably assembled in a housing and rotated by an ignition key and a swingable movement in the housing. A lock that restricts rotation of the camshaft to the locked position when assembled and swung to the locking position, and permits rotation of the camshaft to the locked position when swung to the release position An interlock mechanism for an ignition key, comprising: a lever; and a solenoid device having a lever engaging with the lock lever and swinging the lock lever from a release position to a locking position and from a locking position to a releasing position. An adjusting mechanism for adjusting a displacement range of the lock lever by the plunger is provided. The adjusting mechanism has an assembling shaft portion that is assembled to the housing so that the rotational position can be adjusted, and a supporting shaft portion that is eccentrically provided with respect to the assembling shaft portion and that swingably supports the lock lever. It is desirable to configure the lever support shaft having

[0006]

In the ignition key interlock mechanism according to the present invention configured as described above, since the adjusting mechanism for adjusting the displacement range of the lock lever by the plunger is provided, the interlock mechanism of the camshaft and the lock lever is provided. Manufacturing errors and assembly errors can be absorbed by the adjusting mechanism described above. Therefore, it is not necessary to incorporate a manufacturing error and an assembly error of the camshaft, the lock lever, and the like into the stroke of the plunger to increase the stroke, and the interlock mechanism can be configured using a solenoid device having a small stroke of the plunger. Therefore, it is possible to reduce the size and power consumption of the interlock mechanism.

Further, as the above-mentioned adjusting mechanism, it has an assembling shaft part which is assembled to the housing so that the rotational position can be adjusted, and is provided eccentrically with respect to the assembling shaft part so that the lock lever can be swung. When a lever support shaft having a support shaft portion for supporting the lever is adopted, the adjustment mechanism can be configured simply and inexpensively, and the lever support shaft can be locked by a simple operation such as rotating with respect to the housing. The displacement range of the lever plunger can be adjusted easily and steplessly.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an interlock mechanism for an ignition key according to the present invention, which is a column tube (both not shown) for rotatably supporting a steering shaft.
A cylinder lock 20 is provided on the housing 10 formed integrally with
The camshaft 30, the lock lever 40, and the solenoid device 50 are assembled. The cylinder lock 20 includes a cylinder body 21 integrally assembled with the housing 10,
A cylinder lock rotor 22 rotatably mounted on the cylinder body 21 is provided, and the cylinder lock rotor 22 can be rotated by the ignition key 23 in a state where the ignition key 23 is inserted as shown in the drawing. The ignition key 23 can be inserted into and removed from the cylinder lock rotor 22 only at the LOCK position shown in FIG. The cylinder lock rotor 22 is prevented from coming off by a clip 24.

The camshaft 30 integrally has a cam 31 which cooperates with the lock lever 40 to allow and regulate the rotation of the camshaft 30, and is arranged coaxially with the cylinder lock rotor 22. The housing 10 is rotatably assembled at a portion not shown. The cam shaft 30 is connected to the cylinder lock rotor 22 via a torque transmission plate 25 provided integrally with the cylinder lock rotor 22, and is designed to rotate integrally with the cylinder lock rotor 22. Also, the camshaft 30
Is connected to a lock bar (not shown) for fixing the steering shaft in a non-rotatable manner at a portion not shown, and is also connected to an ignition switch (not shown). The rotor 22 rotates as the rotor 22 is rotated, and the lock bar and the ignition switch described above are operated in a known manner.

The lock lever 40 is formed in an L shape and is swingably assembled to the housing 10 through a lever support shaft 60 which functions as an adjusting mechanism in a mounting hole 41 provided in a base portion. Through hole 1 provided in the housing 10
A tip portion 42 that enters the housing 10 through 1 is engaged with and disengaged from the cam 31 of the cam shaft 30. Further, the lock lever 40 is a solenoid device 50.
And the return spring S (which is interposed between the housing 10 and the lock lever 40) controls the swing, and the tip end portion 42 of the lock lever 40 has the camshaft 3
In the state of swinging to the engagement position where the cam 31 of 0 is engaged,
Rotation of the camshaft 30 to the lock position (corresponding to rotation of the ignition key 23 from the ACC position to the LOCK position shown in FIG. 2), the steering shaft is fixed so as not to rotate when the camshaft 30 is rotated to the lock position. Is regulated, and the tip end 42 of the lock lever 40 is disengaged from the cam 31 of the camshaft 30 and swung to the release position as shown in the figure, the camshaft 30
Is allowed to rotate to the locked position. When the ignition key 23 is rotated from the ACC position shown in FIG. 2 to the START position including the ON position, the rotation of the camshaft 30 is allowed even when the lock lever 40 is in the locking position. For this reason, the shape of the cam 31 of the cam shaft 30 is formed into a shape (details not shown) that allows relative rotation with the lock lever 40.

The solenoid device 50 swings toward the locking position against a return spring S for swinging the lock lever 40 toward the release position by energization from a power control device (not shown). And a plunger 54 coaxially and axially movable with respect to the electromagnetic coil 52 and the core 53 assembled in the casing 51, and a spring 55 for biasing the plunger 54 toward the core 53. (The spring force is smaller than the spring force of the return spring S) and is assembled to the housing 10 by the casing 51. The rod portion 54a of the plunger 54 penetrates through the core 53 and the casing 51 and projects, and the tip of the rod portion 54a abuts the lock lever 40 in a pushable manner.

The lever support shaft 60 is an adjusting mechanism for adjusting the displacement range of the lock lever 40 by the plunger 54. As shown in FIGS. 3 to 6, the lever support shaft 60 is press-fitted into the housing 10 so that the rotational position can be adjusted. Has a large-diameter assembly shaft portion 61 and a small-diameter assembly shaft portion 62 with the same shaft center O1, and a predetermined amount L with respect to these both assembly shaft portions 61, 62.
It has a support shaft portion 63 which is eccentrically provided and supports the lock lever 40 so as to be swingable. This lever support shaft 60
Is designed such that a dedicated tool can be attached to a pair of tool mounting holes (not shown) provided on the end surface of the large-diameter assembly shaft portion 61 with the shaft center O1 as the center, and can be rotated by the dedicated tool. As illustrated in FIG. 5, the shaft center O2 of the support shaft portion 63
If the rotation is adjusted so that it is below the shaft center O1 of both the assembly shaft portions 61 and 62, the plunger 54 of the lock lever 40 is
The displacement range can be adjusted upward, and the displacement range shown in FIG.
If the rotation center is adjusted so that the axis O2 of the support shaft 63 is higher than the axes O1 of the assembly shafts 61 and 62, the displacement range of the lock lever 40 by the plunger 54 is adjusted downward. can do.

In the ignition key interlock mechanism of the present embodiment constructed as described above, when the solenoid device 50 is in the non-energized state, the lock lever 40 is
Is held in the release position by the return spring S, the rotation of the camshaft 30 is not restricted by the lock lever 40 in this state, and the ignition key 23 can be rotated from the ACC position to the LOCK position. is there.

When the solenoid device 50 is in the energized state, the lock lever 40 swings to the locking position against the return spring S by the plunger 54 driven by the electromagnetic attractive force generated between the plunger 54 and the core 53. In this state, the camshaft 3
When 0 is restricted from rotating to the lock position by the lock lever 40, the rotation of the ignition key 23 from the ACC position to the LOCK position is restricted.

Therefore, in a specific state (for example, in a vehicle equipped with an automatic transmission, the shift position is set to the P range, or in all vehicles, the parking brake device is operated), the solenoid device 50 operates. If the solenoid device 50 is maintained in the non-energized state and maintained in the energized state in a state other than the specific state, the ignition key 23 can be rotated from the ACC position to the LOCK position only in the specific state. Ignition key 23 is LO from the ACC position
Ignition key 2 when rotated to CK position
With the rotation of the cylinder lock rotor 22 to the LOCK position by 3, the camshaft 40 rotates to the lock position.

By the way, in the ignition key interlock mechanism of this embodiment, the lock lever 40 is assembled to the housing 10 through the lever support shaft 60 for adjusting the displacement range of the plunger 54.
Due to manufacturing errors and assembly errors of the camshaft 30, the lock lever 40, etc., the above-mentioned lever support shaft 60 is used for the housing 1.
It can be absorbed by adjusting the rotational position with respect to zero. Therefore, it is not necessary to incorporate a manufacturing error and an assembly error of the cam shaft 30 and the lock lever 40 into the stroke of the plunger 54 to increase the stroke, and the solenoid device 50 having a small stroke of the plunger 54 is used. Can be configured, and the size and power saving of the interlock mechanism can be reduced.

Further, in the present embodiment, as the adjusting mechanism for adjusting the displacement range of the lock lever 40 by the plunger 54, the assembly shaft portions 61 and 62 which are assembled to the housing 10 so that the rotational position can be adjusted are provided, and The lock lever 4 is provided eccentrically with respect to the shaft portions 61 and 62.
Since the lever support shaft 60 having the support shaft portion 63 that swingably supports 0 is adopted, the adjustment mechanism can be configured simply and inexpensively, and the lever support shaft 60 can be mounted on the housing 10. The displacement range of the lock lever 40 by the plunger 54 can be easily and steplessly adjusted by a simple operation such as rotation.

In the above embodiment, the housing 10 has the assembling shaft portions 61 and 62 which are assembled so that the rotational position can be adjusted, and the lock lever 40 is provided eccentrically with respect to the assembling shaft portions 61 and 62. Although the lever support shaft 60 having the support shaft portion 63 that swingably supports is adopted as the adjusting mechanism, this adjusting mechanism may have a function of adjusting the displacement range of the lock lever 40 by the plunger 54. It may be a rod length adjusting device (not shown) provided on the rod portion 54a of the plunger 54, and is not limited to the above embodiment.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an interlock mechanism for an ignition key according to the present invention.

FIG. 2 is a side view of the cylinder lock shown in FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a perspective view of the lever support shaft alone shown in FIGS. 1 and 3.

5 is an enlarged view of an essential part showing a state in which a support shaft portion of the lever support shaft shown in FIGS. 1 and 3 is most lowered.

6 is an enlarged view of an essential part showing a state in which a support shaft portion of the lever support shaft shown in FIGS. 1 and 3 is most raised.

[Explanation of symbols]

10 ... Housing, 20 ... Cylinder lock, 21 ... Cylinder lock housing, 22 ... Cylinder lock rotor, 23 ... Ignition key, 30 ... Cam shaft, 40 ... Lock lever, 50 ... Solenoid device, 54 ... Plunger, 60 ...
Lever support shaft (adjustment mechanism), 61, 62 ... Assembly shaft part, 6
3 ... Support shaft, S ... Return spring.

Claims (2)

[Claims] 1. A camshaft rotatably assembled in a housing and rotated by an ignition key, and the camshaft oscillatably assembled to the housing and swung to a locking position. The lock lever has a lock lever that restricts the rotation of the cam shaft to the lock position and allows the cam shaft to rotate to the lock position while being swung to the release position, and the plunger that engages with the lock lever. In an ignition key interlock mechanism including a solenoid device for swinging the lock lever from a release position to a locking position and from a locking position to a release position, an adjustment mechanism for adjusting a displacement range of the lock lever by the plunger is provided. An interlock mechanism for the ignition key. 2. A support shaft portion that has an assembly shaft portion that is assembled to the housing so that its rotational position can be adjusted, and that is eccentrically provided with respect to the assembly shaft portion and that swingably supports the lock lever. The ignition key interlock mechanism according to claim 1, wherein the adjustment mechanism is configured by a lever support shaft having a.