JP4050450B2 - Steering lock device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steering lock device that controls rotation of a steering shaft of an automobile.
[0002]
[Prior art]
As a steering lock device used in a conventional automobile or the like, for example, a device that simultaneously controls an ignition switch and a steering shaft as shown in FIGS. 8 to 10 and Japanese Patent Laid-Open No. 9-228706 is known.
[0003]
8 is a cross-sectional view showing a locked state of the steering lock before key rotation, FIG. 9 is a cross-sectional view showing an unlocked state of the steering lock after key rotation, and FIG. 10 shows a conventional rotor and lock member. It is a perspective view.
[0004]
The steering lock device 1 includes a casing 2, a key cylinder 5 disposed in the casing 2 so as to be rotatable by a key 22, a connecting portion 7, a cam portion 8 and a key cylinder 5 which are connected to the key cylinder 5 so as to be rotatable together. A rotor 6 comprising a connection portion 9 connected to an ignition switch 10 and the like provided on the other side, and a cam follower portion 19 that is detachably provided on a steering shaft (not shown) and engages with the cam portion 8. When the rotor 6 is rotated, the lock member 14 is moved from the locked position where the cam portion 8 is engaged with the steering shaft to the unlocked position where the engagement with the steering shaft is released, and the lock member 14 is moved to the locked position. And a spring 15 that biases toward the surface.
[0005]
In particular, as shown in FIG. 10, the lock member 14 is divided into a hanger member 14A having a cam driven portion 19 and a locking rod 14B having an engaging portion 18 that engages with a steering shaft (not shown). ing.
[0006]
Further, the steering lock device 1 has a steering shaft attached to a mounting portion 23 formed in a substantially circular arc shape along the outer periphery of a steering shaft (not shown) on a side portion (lower surface in the drawing) of the casing 2 with a bracket (not shown). It is assembled to the steering shaft in such a way as to be pinched.
[0007]
When the steering lock device 1 is rotated by inserting the key 22 into the key cylinder 5, as shown in FIG. 8, the locking rod 14B protrudes from the casing 2 toward the steering shaft as shown in FIG. The lower end of the locking rod 14 </ b> B rotates into the unlocked state accommodated in the casing 2. Further, when the key 22 is extracted in the locked state of the steering lock, the key cylinder 5 cannot be rotated and the operation of the ignition switch 10 is prohibited, and the engaging portion 18 of the locking rod 14B is engaged with the steering shaft. Is prevented from being stolen.
[0008]
[Problems to be solved by the invention]
According to the conventional structure, the lock member 14 is divided into the hanger member 14A having the cam driven portion 19 that engages with the cam portion 8 of the rotor 6 and the locking rod 14B having the engaging portion 18 that engages with the steering shaft. Since it is formed in a divided manner, there are problems such as a large number of parts, cost of parts, and an increase in the number of assembly steps.
[0009]
In particular, the locking rod 14B that engages with a steering shaft (not shown) is required to have a predetermined strength, so that a metal square or the like is used, and the connecting portion 30 and the like with the hanger member 14A are cut by cutting. It was forming. Therefore, it takes time and labor to process the rocking rod 14B, which is disadvantageous in terms of cost.
[0010]
Therefore, the present invention provides a steering lock device that can achieve both improvement in assembly and cost reduction while ensuring the strength of the engaging portion of the lock member that engages with the steering shaft.
[0011]
[Means for Solving the Problems]
In the first aspect of the invention, the key is related to the casing, the key cylinder disposed in the casing so as to be rotatable by the key, the connecting portion connected to the key cylinder so as to be integrally rotatable, the cam portion, and the key cylinder. A rotor including a connecting portion connected to an ignition switch provided on the opposite side, a cam follower portion that is detachably provided on the steering shaft and engages with the cam portion, and is rotated by the cam portion when the rotor rotates. A steering lock device comprising: a lock member that is moved from a lock position that engages with the steering shaft to an unlock position that releases the engagement with the steering shaft; and a spring that biases the lock member toward the lock position. The lock member is formed by at least double polymerization by punching and bending a plate material. Both the cam portion, is formed almost over the entire length direction of the connection portion of the rotor, the length of the cam portion along the longitudinal direction of the connecting portion is equal to or greater than the thickness of the cam follower, In addition, the cam portion can be engaged with the entire thickness of the cam follower in both the state where the lock member and the rotor are orthogonal to each other and the state where the lock member and the rotor are inclined at a predetermined angle from the orthogonal state. The angle at which the lock member and the rotor intersect can be set within a range between an orthogonal state and a state inclined by a predetermined angle from the orthogonal state.
[0012]
The invention according to claim 2 is characterized in that only the engaging portion that engages with the steering shaft of the lock member according to claim 1 is superposed at least twice.
[0014]
【The invention's effect】
According to the first aspect of the present invention, the lock member, which has been conventionally formed by cutting a metal square or the like by cutting or the like, is formed by punching and bending a metal plate. Therefore, the manufacturing time of the lock member can be shortened, and the manufacturing cost of the lock member can be reduced.
[0015]
In addition, since the lock member that has been conventionally divided into a hanger member having a cam driven portion and a locking rod having an engaging portion that engages with the steering shaft is integrally formed, the number of parts is reduced. Further, the number of assembling steps can be reduced and the cost can be advantageously obtained.
[0016]
On the other hand, in order to form the lock member by punching a metal plate material, the plate thickness of one plate material is set thinner than the conventional lock member in consideration of workability, but the lock member is made of a plate material. After the punching process, by superposing at least two layers (the number of layers depending on the plate thickness is appropriately selected), sufficient strength can be ensured for the engaging portion with the steering shaft.
[0017]
Furthermore, by superposing the plate material in this manner, the thickness of the lock member (total size of the polymerized plate material) is formed in accordance with the same size as that of the conventional lock member, so that other components constituting the steering lock device It can be easily implemented by exchanging only the lock member without affecting the peripheral components.
Further, since the cam portion is formed over substantially the entire length of the connecting portion of the rotor, the degree of freedom of the setting range of the angle at which the lock member and the rotor intersect can be increased, The degree of layout freedom of the steering lock device can be increased.
Further, the setting range of the angle at which the lock member and the rotor intersect is that the steering lock device is generally attached to the steering shaft at a predetermined angle in consideration of the key insertion direction by the occupant. The angle at which the lock member that engages with the steering shaft and the rotor that engages with the lock member intersect is assembled at a predetermined angle from the orthogonal state, and this indicates the setting range of the intersecting angle. Yes.
The angle at which the lock member and the rotor intersect is set within a range in which the cam portion provided on the rotor and the cam driven portion of the lock member that engages with the cam portion are reliably engaged and operated. However, as described in claim 1, the cam portion is formed over substantially the entire length of the connecting portion of the rotor, so that the setting range of the angle at which the lock member and the rotor intersect is set. Can increase the degree of freedom. As a result, the degree of freedom of the setting range of the angle at which the steering lock device and the steering shaft intersect can be increased, and the degree of freedom in layout of the steering lock device can be increased.
[0018]
According to the second aspect of the present invention, in addition to the effect of the first aspect, the lock member is formed by superimposing only the engaging portion that engages with the steering shaft at least twice. In addition to being able to ensure sufficient strength for the engaging part, the plate thickness can be set thinner than the conventional part in other parts such as the cam follower that engages with the cam part of the rotor. The weight can be reduced.
[0019]
If the lock member is reduced in weight as described above, an effect of reducing the rotation resistance when the key is operated by the operator can be expected.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0024]
1 to 4 show a steering lock device of an automobile to which the present invention is applied. FIG. 1 is a sectional view showing a locked state of a steering lock device before key rotation, and FIG. 2 is a steering lock after key rotation. FIG. 3 is a perspective view showing a rotor and a lock member, which are essential parts of the present invention, and FIG. 4 is a perspective view showing a steering lock device.
[0025]
Reference numeral 1 denotes a steering lock device. The steering lock device 1 includes a casing 2, a housing case 3 disposed in the casing 2, and a cover 4 fixed to the front portion of the housing case 3. ing. A key cylinder 5 is rotatably disposed in the housing case 3. A plurality of tumbler holes 5a are formed in the key cylinder 5, and a tumbler 5b is provided in each tumbler hole 5a by being urged by a spring or the like (not shown).
[0026]
Reference numeral 6 is connected to an ignition switch 10 disposed on the opposite side of the key 22 with respect to the key cylinder 5 and a cam portion 8 that engages with a connecting portion 7 that is coupled to the key cylinder 5 so as to be rotatable integrally with the key cylinder 5. The rotor which consists of the connection part 9 to show is shown.
[0027]
The connecting portion 7 of the rotor 6 is formed with a hole 12 through which an engaging protrusion 11 extending from the key cylinder 5 is inserted and engaged. The key cylinder 5 is attached to the cover 4 side in the hole 12. A spring member 13 is provided.
[0028]
Reference numeral 14 is detachably provided on a steering shaft (not shown), and is moved from a locked position where the cam portion 8 is engaged with the steering shaft to an unlocked position where the engagement with the steering shaft is released when the rotor 6 is rotated. The lock member 14 is formed by double polymerization by punching and bending a metal plate material. The lock member 14 is urged toward the locking position by a spring 15.
[0029]
Specifically, as shown in FIG. 3, the lock member 14 has a convex portion 16 for providing the above-described spring 15 at the top portion thereof, and an opening 17 through which the connecting portion 9 and the cam portion 8 of the rotor 6 are inserted into the main body portion. And an engaging portion 18 that engages with a steering shaft (not shown) at the lower end. A cam driven portion 19 that engages with the cam portion 8 of the rotor 6 is formed on the inner periphery of the upper portion of the opening 17 so as to protrude into the opening 17.
[0030]
In particular, in the present embodiment, the lock member 14 is formed by bending the flange portion formed so as to protrude on both sides of the engagement portion 18 at the lower end from the left and right, and overlapping only the engagement portion 18 in a double manner. .
[0031]
Further, the cam portion 8 formed on the rotor 6 is formed over almost the entire region in the length direction of the connecting portion 9 connected to the ignition switch 10. However, as shown in Figures 1-3, the end portion side to be connected to the ignition switch 10 of the connection portions 9, because the portion is required for supporting the rotor 6 to the casing 2, cams 8 are formed It has not been.
[0032]
Further, as shown in FIG. 4, the steering lock device 1 includes a bolt on a mounting portion 23 formed in a substantially circular arc shape along the outer periphery of the steering shaft (not shown) on the side portion (lower surface in the drawing) of the casing 2. The steering shaft is assembled to the steering shaft in such a manner that the steering shaft is clamped by the mounting bracket 25 fastened and fixed by 24, 24. At this time, the angle at which the direction (A) of the steering lock device 1 and the direction (B) of the steering shaft intersect is preferably orthogonal, but in consideration of the insertion direction of the key 22 by the operator, a predetermined angle ( It is assembled with α1).
[0033]
Accordingly, the angle at which the lock member 14 that engages with the steering shaft and the rotor 6 that engages with the lock member 14 intersect each other is also assembled with a predetermined angle (α2) from the orthogonal state.
[0034]
In the drawing, reference numeral 26 denotes a cap that hides the assembly hole 27 formed in the side portion (upper surface in the drawing) of the casing 2. The hole 27 is an assembly hole for assembling the lock member 14 to the steering lock device 1. After the lock member 14 and the spring 15 are assembled, the hole 27 is assembled from the hole 27 into the casing 2, and then closed by the cap 26. Is done.
[0035]
Thus, the steering lock device 1 is configured.
[0036]
Next, the operation of the steering lock device 1 will be described.
[0037]
In the state where the key 22 is inserted into the key cylinder 5 in the steering lock device 1, the lock member 14 is mounted on the side portion of the casing 2 (the lower surface in the drawing) as shown in FIG. Since the engaging portion 18 and the steering shaft (not shown) are engaged with each other, the steering shaft is prevented from rotating.
[0038]
Next, when the key 22 is rotated, the key 22 moves from the lock position (0) shown in FIG. 4 to the off position (1), the ACC position (2), the on position (3), and the start position (4 ) Rotate sequentially to each position. At this time, when the key 22 is rotated, the rotor 6 connected to the key cylinder 5 so as to rotate integrally is rotated. As the rotor 6 rotates, the cam portion 8 of the rotor 6 and the cam follower portion 19 of the lock member 14 are engaged, and the lock member 14 is moved to the unlocked position by the cam action, as shown in FIG. Further, the engaging portion 18 of the lock member 14 is accommodated in the casing 2 to release the engagement with the steering shaft and allow the steering shaft to rotate.
[0039]
After the key 22 is once rotated to the position shown in FIG. 2, the key 22 is returned to the locked position (0) shown in FIG. 1 again by a known holding structure until the key 22 is removed from the key cylinder 5. The lock member 14 is held in the unlocked position. As the type of the holding structure, for example, a pin type as shown in Japanese Patent Laid-Open No. 9-228706, a check lever system separately provided with a detecting means for detecting the insertion state of the key 22, or the like is used.
[0040]
When the key 22 is returned to the lock position (0) and the key 22 is removed, the engaging portion 18 of the lock member 14 is engaged with the steering shaft, and the rotation of the steering shaft is blocked to prevent theft.
[0041]
According to the structure of the above embodiment, the lock member 14 that has been conventionally formed by cutting a metal square or the like by cutting or the like is formed by punching and bending a metal plate. Therefore, the manufacturing time of the lock member 14 can be shortened, and the manufacturing cost of the lock member 14 can be reduced.
[0042]
In addition, the lock member 14 that is conventionally divided into a member having the cam driven portion 19 and a member having the engaging portion 18 that engages with the steering shaft (not shown) is integrally formed. Therefore, the number of parts and the number of assembling steps can be reduced, and the cost can be obtained more advantageously.
[0043]
On the other hand, in order to form the lock member 14 by punching a metal plate material, the plate thickness t of one plate material is set thinner than the conventional lock member 14 in consideration of workability. 14 after punching the plate material, and by superposing it into a double layer (in this embodiment, it is doubled, but how many layers can be appropriately selected depending on the plate thickness of the plate material) The required strength of the engaging portion can be sufficiently secured.
[0044]
Further, by superposing the plate material in this way, the thickness L of the lock member 14 (total size of the polymerized plate material) is formed in accordance with the size equivalent to the size L ′ of the conventional lock member 14, thereby steering. This can be easily performed by replacing only the lock member 14 without affecting other components and peripheral components constituting the lock device 1.
[0045]
In particular, in the present embodiment, in addition to the above-described effects, the lock member 14 is formed by overlapping only the engaging portion 18 that engages with the steering shaft (not shown), and thus the engaging portion with the steering shaft. In addition to being able to sufficiently secure the strength required for 18, in other portions such as the cam driven portion 19 that engages with the cam portion 8 of the rotor 6, the plate thickness can be set thinner than before, and the lock member 14 can be reduced in weight.
[0046]
Thus, if the lock member 14 is reduced in weight, the effect of reducing the rotational resistance when the operator operates the key can be expected.
[0047]
Further, since the cam portion 8 is formed over substantially the entire area of the connecting portion 9 of the rotor 6, the degree of freedom of the setting range of the angle at which the lock member 14 and the rotor 6 intersect can be increased, and thus Thus, the degree of freedom in layout of the steering lock device 1 can be increased.
[0048]
The setting range of the angle at which the lock member 14 and the rotor 6 intersect each other is that the steering lock device 1 generally has a predetermined angle (α1) with respect to the steering shaft in consideration of the direction in which the key 22 is inserted by the occupant. Since it is attached, the angle at which the lock member 14 that engages with the steering shaft and the rotor 6 that engages with the lock member 14 intersect is also assembled with a predetermined angle (α2) from the orthogonal state. It refers to the setting range of the intersecting angle.
[0049]
Further, the angle at which the lock member 14 and the rotor 6 intersect each other is such that the cam portion 8 provided on the rotor 6 and the cam follower portion 19 of the lock member 14 that engages with the cam portion 8 are reliably engaged. In this way, the cam portion 8 is formed over almost the entire connection portion 9 of the rotor 6 to set the angle at which the lock member 14 and the rotor 6 intersect. The degree of freedom of the range can be increased. As a result, the degree of freedom of the setting range of the angle at which the steering lock device 1 and the steering shaft intersect with each other can be increased, and the degree of freedom in layout of the steering lock device 1 can be increased.
[0050]
5 and 6 show the second and third embodiments in which the method of overlapping the engaging portion 18 of the lock member 14 is different. In FIG. 5, only the engaging portion 18 is double-polymerized by bending a flange portion formed to protrude below the engaging portion 18 of the lock member 14, and FIG. Only the engaging portion 18 is double-polymerized by bending a flange portion formed to protrude from one side portion of the engaging portion 18 of the lock member 14. Thereby, the same effect as the above-mentioned embodiment can be acquired.
[0051]
Further, when the thickness of the plate member is set to be thin, or when the strength of the engaging portion 18 is further increased, the engaging portion 18 of the locking member 14 is shown in FIG. Only the engaging portion 18 may be superposed in a triple manner by bending the flange portion formed so as to project on both sides.
[0052]
In addition, the lock member 14 may be entirely overlapped as in the fourth embodiment shown in FIG. 7, and in this case, the same effect as that of the above embodiment is obtained except that the lock member 14 is reduced in weight. Obtainable.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a locking position in an embodiment of the present invention.
FIG. 2 is a sectional view showing an unlocking position in the embodiment.
FIG. 3 is a perspective view of a rotor and a lock member, which are main parts of the embodiment.
FIG. 4 is a perspective view of a steering lock device.
FIG. 5 is a perspective view of a lock member according to a second embodiment of the present invention.
FIG. 6 is a perspective view of a lock member according to a third embodiment of the present invention.
FIG. 7 is a perspective view of a lock member according to a fourth embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a locking position in a conventional structure.
FIG. 9 is a cross-sectional view showing an unlocking position in a conventional structure.
FIG. 10 is a perspective view of a conventional rotor and a lock member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steering lock apparatus 2 Casing 5 Key cylinder 6 Rotor 7 Connection part 8 Cam part 9 Connection part 10 Ignition switch 14 Lock member 15 Spring 18 Engagement part 19 Cam follower part 22 Key

Claims (2)

A casing, a key cylinder disposed in the casing so as to be rotatable by a key, a coupling portion coupled to the key cylinder so as to be integrally rotatable, a cam portion, and an ignition switch provided on the opposite side of the key cylinder. A rotor including a connecting portion, a cam follower portion that is detachably provided on the steering shaft and engages with the cam portion, and is steered from a locked position where the cam portion engages with the steering shaft when the rotor rotates. A steering lock device comprising: a lock member that is moved to an unlocked position for releasing engagement with a shaft; and a spring that biases the lock member toward the locked position,
The lock member is formed by overlapping at least two layers by punching and bending a plate material, and the cam portion is formed over substantially the entire length direction of the connection portion of the rotor . The length of the cam portion along the length direction is equal to or greater than the thickness of the cam follower, and the lock member and the rotor are orthogonal to each other, and the lock member and the rotor are inclined at a predetermined angle from the orthogonal state. By allowing the cam portion to engage the entire thickness of the cam follower in both states ,
A steering lock device characterized in that an angle at which the lock member and the rotor intersect can be set within a range between an orthogonal state and a state inclined by a predetermined angle from the orthogonal state.   2. The steering lock device according to claim 1, wherein the lock member is formed by superimposing at least two engaging portions that engage with a steering shaft. 3.

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