JP2015140027A - steering lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering lock device which enables a switch gear to be easily removed without impairing an anti-theft function that disables an unauthorized lock releasing action from the exterior.SOLUTION: A steering lock device 10 includes: a lock body 11 having an opening part 11c where a first internal space 11a formed in an axial direction and a second internal space 11b formed in a direction intersecting with the axial direction communicate with each other; a key rotor 23 which is housed in the first internal space and may rotate around an axis; a lock stopper 32 which may move in the second internal space; a cam shaft 33 which converts rotary motion of the key rotor into linear motion of the lock stopper; a lock bar 31 where a base end part is held by the lock stopper and a tip part may engage with or disengage from a column shaft of a vehicle; and a switch holder 41 where one side is undetachably fixed to the opening part of the lock body and the other side detachably holds a switch device 43.

Description

  The present invention relates to a steering lock device that locks the rotation of a steering shaft for a vehicle.

  In order to prevent theft of the vehicle while the vehicle is stopped, a steering lock device that locks the rotation of the steering shaft is frequently used. As an example of this type of steering lock device, there has been proposed a two-wheeled vehicle steering lock device in which countermeasures against unauthorized unlocking are taken for a key rotor rotated by a key (see, for example, Patent Document 1).

  The steering lock device for a motorcycle described in Patent Document 1 includes a cylindrical body fixed in the vicinity of the steering shaft. A cylinder lock having a key rotor is disposed at the front of the body. A camshaft that rotates integrally with the key rotor is arranged on the same axis as the cylinder lock, and can be moved in the direction intersecting the axial direction of the camshaft as the camshaft rotates. A lock bar connected to is provided. At the rear part of the body, an ignition switch connected to the rear end of the camshaft is arranged on the same axis as the cylinder lock.

JP 11-99973 A

  By the way, in this type of steering lock device, in order to enhance the anti-theft performance, for example, a switch device such as an ignition switch is fastened and fixed to the body with a neck trim bolt so that the switch device cannot be easily detached from the body. It is common to use.

  However, even if there is a case where the switch device fails, it is difficult to replace the switch device because the switch device alone cannot be easily removed from the body. For this reason, there has been a demand for the appearance of a steering lock device having a structure in which the switch device can be easily replaced without impeding the anti-theft function.

  Accordingly, an object of the present invention is to provide a steering lock device in which a switch device can be easily removed without obstructing an anti-theft function that disables an unauthorized unlocking action from the outside.

[1] The present invention provides a lock body having an opening in which a first internal space formed in an axial direction and a second internal space formed in a direction intersecting the axial direction communicate with each other; A key rotor that is housed in the internal space of 1 and is rotatable about an axis, a lock stopper that is movable in the second internal space, and is coupled to the key rotor so as to be integrally rotatable. A camshaft for converting into a linear motion of the lock stopper, a cam shaft that is offset laterally from the center line of the lock stopper and disposed in the second internal space, and a proximal end is held by the lock stopper, and a distal end A lock bar that is detachable from the column shaft of the vehicle, one side is fixed to the opening of the lock body in a non-removable manner, and the other side holds the switch device detachably In the steering lock apparatus characterized by comprising: a switch holder, a.

[2] The switch holder according to [1] is characterized in that the switch holder is coaxial with the camshaft and is arranged behind a base end portion of the lock bar.

[3] The switch holder according to [1] or [2] is characterized in that a pedestal for receiving a lock spring disposed at a base end portion of the lock stopper is provided.

[4] The camshaft according to any one of [1] to [3] is configured to be movable integrally in an axial direction of the key rotor against a resilient force with a key inserted therein, A hook preventing means for preventing the shaft from being caught when elastically contacting the switch holder is provided.

[5] The camshaft described in [4] above is provided with an integrally movable and rotatable spring member, and the catch preventing means is disposed between the end surface of the spring member and the switch holder. It is characterized by comprising a sliding member.

[6] The camshaft according to the above [5] includes a cylindrical portion that is integrally movable and rotatable connected to the key rotor, and a shaft portion that is connected to the inner surface of the cylindrical portion. The spring member and the sliding member are held between the tube portion and the shaft portion.

[7] The camshaft according to the above [4] has a cylindrical portion that is integrally movable and rotatable connected to the key rotor, and a shaft portion that is connected to a switch holder facing surface of the cylindrical portion. The catch prevention means is constituted by a leaf spring having an elastic piece swelled in a semicircular arc shape, and the leaf spring is fixed to the switch holder facing surface of the cylindrical portion along the peripheral surface of the shaft portion. It is characterized by being made.

  According to the present invention, the switch device can be easily replaced without hindering the anti-theft function for preventing an unauthorized unlocking action from the outside.

It is a longitudinal cross-sectional view for demonstrating the principal part of the steering lock apparatus which concerns on 1st Embodiment suitable for this invention. It is a plane sectional view for explaining the important section of the steering lock device concerning a 1st embodiment. It is a figure for demonstrating the locking mechanism of the steering lock apparatus which concerns on 1st Embodiment. It is figure (a)-(c) for demonstrating operation | movement of the locking mechanism of the steering lock apparatus which concerns on 1st Embodiment. FIG. 5A is a diagram corresponding to FIG. 4B and FIG. 4B is a diagram corresponding to FIG. 4C for explaining the operation of the lock mechanism of the steering lock device according to the first embodiment. It is a fragmentary longitudinal cross-sectional view for demonstrating the locking mechanism of the steering lock apparatus which concerns on 2nd Embodiment. It is a fragmentary top sectional view for demonstrating the locking mechanism of the steering lock apparatus which concerns on 2nd Embodiment. It is a perspective view for demonstrating the catch prevention means of the lock mechanism of the steering lock apparatus which concerns on 2nd Embodiment. It is a figure for demonstrating another example of the catch prevention means of the lock mechanism of the steering lock apparatus which concerns on 2nd Embodiment. It is a figure for demonstrating another example of the catch prevention means of the lock mechanism of the steering lock apparatus which concerns on 2nd Embodiment. It is a figure for demonstrating another example of the catch prevention means of the lock mechanism of the steering lock apparatus which concerns on 2nd Embodiment.

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

[First Embodiment]
(Overall structure of steering lock device)
In FIG. 1, reference numeral 10 generally indicates a typical steering lock device that disables the rotation operation of the column shaft 1 while the vehicle is stopped. The steering lock device 10 includes a lock body 11 that is integrally formed of a metal material such as zinc die casting.

  As shown in FIG. 1, an impact absorbing mechanism 4 such as a tilt telescopic (not shown) is assembled in a column tube 3 that rotatably accommodates and holds the column shaft 1 via a bearing 2. The column tube 3 and the lock body 11 are covered with a column cover 5 disposed below a steering wheel (not shown).

  As shown in FIG. 1, the lock body 11 is composed of a block-like cylinder extending in a direction intersecting the column tube 3, and includes a first internal space 11 a formed in the axial direction of the cylinder, and a cylinder The second internal space 11b formed in a direction substantially perpendicular to the axial direction of the body has an opening 11c communicating with each other.

  As shown in FIG. 1, the lock body 11 is integrally formed with a cylindrical lock body attachment portion 12 for attachment to the column tube 3. A second internal space 11b is formed in the cylindrical portion of the lock body mounting portion 12, and the tip of the cylindrical portion has a semicircular arc-shaped fitting recess 12a. By fitting the fitting recess 12 a to the outer peripheral surface of the column tube 3, the lock body 11 is fastened and fixed by the bolt 14 via the bracket 13.

  As shown in FIG. 1, a through hole 12 b is formed through the fitting recess 12 a of the lock body mounting portion 12. A lock bar 31 that allows and prevents the rotation of the column shaft 1 is accommodated in the through hole 12b so as to be movable forward and backward.

  On the other hand, a cylindrical lock holder 6 is fixed to the outer peripheral surface of the column shaft 1 as shown in FIG. A plurality of lock holes 6 a,..., 6 a are formed through the outer periphery of the lock holder 6 so that the tip of the lock bar 31 can be engaged and disengaged through a through hole formed in the column tube 3. Has been.

  In the first internal space 11a of the lock body 11, as shown in FIGS. 1 and 2, an ignition cylinder portion 20 (hereinafter referred to as an IG cylinder portion) capable of rotating a mechanical key (not shown) that is not illustrated. 20). A steering lock portion 30 that locks the rotation of the column shaft 1 and an engine drive that is an example of a switch device are provided in an opening portion 11c that is open to the outside space under the lock body mounting portion 12 of the lock body 11. Ignition switch section 40 (hereinafter referred to as IG switch section 40).

(Configuration of IG cylinder)
As shown in FIGS. 1 and 2, the IG cylinder portion 20 is provided with a key cylinder 21 capable of mechanical authentication with a mechanical key. The key cylinder 21 includes a cylindrical rotor case 22 and a columnar key rotor 23 that is rotatably accommodated in the rotor case 22.

  As shown in FIGS. 1 and 2, a key insertion hole 23a is formed on the rear side of the key rotor 23 along the rotor rotation axis. On the front side of the vehicle body of the key rotor 23, a fitting shaft portion 23b that fits with the camshaft 33 of the steering lock portion 30 protrudes along the rotor rotation axis direction.

  The key rotor 23 inserts the mechanical key into the key insertion hole 23a and simultaneously moves from the initial position on the rear side of the vehicle body to the position on the front side of the vehicle body, so that the key insertion hole 23a is viewed clockwise from the LOCK position when viewed from the front. , An ACC (accessory) position, an ON position (on), and a START (start) position.

  As shown in FIGS. 1 and 2, a plurality of tumblers 24,..., 24 having a long plate shape in the radial direction are assembled inside the key rotor 23. When the mechanical key is not inserted into the key rotor 23, the end of the tumbler 24 protrudes from the outer peripheral surface of the key rotor 23, and the protruding end engages with the inner peripheral surface of the rotor case 22. The rotation of the key rotor 23 is restricted.

  On the other hand, in a state where the mechanical key is inserted into the key insertion hole 23a of the key rotor 23, all the tumblers 24 are retracted inward from the outer peripheral surface of the key rotor 23 by being engaged with the key groove of the mechanical key. As a result, the key rotor 23 can be rotated without causing all the tumblers 24 to interfere with the inner peripheral surface of the rotor case 22.

(Configuration of steering lock)
As shown in FIGS. 1 and 2, the steering lock unit 30 that is linked to the rotation operation of the key rotor 23 by the mechanical key includes a lock stopper 32 that holds the lock bar 31, and the rotational movement of the key rotor 23 by the operation of the mechanical key. And a camshaft 33 for converting into 32 linear motions.

  As shown in FIG. 1, the lock bar 31 and the lock stopper 32 are formed in a long shape from a highly rigid metal material. A locking groove 31 a that is locked to the lock stopper 32 is formed at the base end of the lock bar 31, and a locking that is locked to the locking groove 31 a of the lock bar 31 is formed at the distal end of the lock stopper 32. The protrusion 32a is bent.

  As shown in FIG. 1, the lock bar 31 and the lock stopper 32 are assembled into the second internal space 11 b through an opening 11 c formed in the lower part of the lock body mounting portion 12 of the lock body 11. ing. A lock spring 34 that urges the lock bar 31 toward the column shaft 1 is disposed at the base end of the lock stopper 32.

As the steering lock unit 30, it is important that the center line CL ₂ of the center line CL ₁ and the lock stopper 32 of the lock bar 31 are offset at intervals D _1. Construction of arranging the center line CL ₁ of the lock bar 31 from the center line CL ₂ of the lock stopper 32 at a position offset to the side surface side, operability and appearance design of the IG cylinder portion 20 the position of the key insertion hole 23a as a reference The lock holder 6 fixed to the outer peripheral surface of the column shaft 1 is attached to the bearing 2 that rotatably holds the column shaft 1 in the column tube 3. it is those made from the design intent of the column tube 3 that arranged at a position away at a distance D _2.

  On the other hand, as shown in FIGS. 1 and 2, the camshaft 33 that rotates integrally with the key rotor 23 includes a bottomed cylindrical portion 33a that is arranged coaxially with the key rotor 23, and an inner bottom surface of the bottomed cylindrical portion 33a. And a shaft portion 33b extending linearly. A fitting recess 33c that fits with the fitting shaft portion 23b of the key rotor 23 is formed on the outer bottom surface of the bottomed cylindrical portion 33a, and the IG switch portion 40 is connected to the tip of the shaft portion 33b. ing.

  As shown in FIGS. 1 to 3, a cam surface 33 d facing the lock stopper 32 is formed on the outer peripheral surface of the bottomed cylindrical portion 33 a of the cam shaft 33. The lock stopper 32 is formed with a fitting hole 32b that is movably fitted to the bottomed cylindrical portion 33a of the camshaft 33, and the fitting hole 32b that faces the cam surface 33d of the camshaft 33 is formed. The opening end surface is formed as a cam follower surface 32c. Accordingly, the lock stopper 32 can move in a direction substantially orthogonal to the camshaft 33 as the camshaft 33 rotates.

  As shown in FIGS. 1 and 3, the lock stopper 32 is formed with an accommodation hole for accommodating the lock restricting means. In the accommodation hole, a cap-like lock pin 35 that can be protruded and retracted toward the inner bottom surface of the bottomed cylindrical portion 33a of the camshaft 33 is accommodated. A coil spring 36 is accommodated in the lock pin 35. Due to the elasticity of the coil spring 36, the lock pin 35 rides from the inner bottom surface of the bottomed cylindrical portion 33 a of the cam shaft 33 to the outer peripheral surface as the cam shaft 33 rotates, so that the linear movement of the lock stopper 32 is caused by the cam shaft 33. Being regulated.

  As shown in FIGS. 1 and 2, when the mechanical key is pulled out from the key insertion hole 23a, the key rotor 23 and the camshaft 33 are connected between the bottomed cylindrical portion 33a and the shaft portion 33b of the camshaft 33. A coil spring 37 is disposed as an automatic return means for returning and moving from the front position to the initial position on the rear side of the vehicle body. Due to the elasticity of the coil spring 37, the key rotor 23 and the camshaft 33 are directed from the IG switch portion 40 toward the IG cylinder portion 20 between the inner bottom surface of the bottomed cylindrical portion 33 a of the camshaft 33 and the IG switch portion 40. It is a configuration to be energized.

(Configuration of IG switch)
Above in the steering lock portion 30, as described above, the center line CL ₁ of the lock bar 31 is disposed at a position offset from the center line CL ₂ of the lock stopper 32 on the side surface side. The construction of arranging the center line CL ₁ of the lock bar 31 from the center line CL ₂ of the lock stopper 32 at a position offset to the side surface side, to secure the arrangement space of the IG switch 40 on the base end portion rear side of the lock bar 31 Thus, the IG switch portion 40 can be arranged on the rear side of the base end portion of the lock bar 31 on the same axis as the key rotor 23.

  The IG switch unit 40 is arranged coaxially with the key rotor 23 and arranged on the rear side of the proximal end of the lock bar 31, as shown in FIG. 1, the IG cylinder unit 20, the steering lock unit 30, and the IG It is made up of the design intent of the impact absorbing mechanism 4 to set the entire length L of the steering lock device 10 including the switch part 40 short and the design intent of the column cover 5 to set the width W of the steering lock device 10 small. is there.

  The illustrated IG switch unit 40 includes an IG switch 43 that performs a switch operation in conjunction with a rotation operation of the key rotor 23 by a mechanical key. As the key rotor 23 rotates, the IG switch 43 switches the connection state of the contacts that become LOCK, ACC, ON, and START corresponding to the LOCK position, ACC position, ON position, and START position of the key rotor 23. Based on the connection state of the IG switch 43 by this switching operation, the state of various in-vehicle devices and engines is switched.

(Configuration of anti-theft means)
By the way, as described above, in order to satisfy the design intention of the IG cylinder portion 20, the design intention of the column tube 3, the design intention of the shock absorbing mechanism 4, and the design intention of the column cover 5, The steering lock portion 30 configured as described above is assembled in a state where the steering lock portion 30 is exposed to the opening portion 11c formed in the lower portion of the lock body attachment portion 12 of the lock body 11. Therefore, it is important to close the opening 11c of the lock body 11 to prevent the steering lock portion 30 from being exposed to the external space and to enhance the exchangeability of the IG switch portion 40.

  In the first embodiment, as shown in FIGS. 1 and 2, the IG switch unit 40 includes a switch holder 41 made of a metal material such as zinc die casting as a separate member from the lock body 11. Is provided. The switch holder 41 is assembled toward the second internal space 11b through an opening 11c formed in the lower portion of the lock body attachment portion 12.

  One side of the switch holder 41 that is the opening facing surface is fixed to the lock body 11 so as not to be detachable with the opening 11c of the lock body 11 closed, thereby preventing an unauthorized unlocking action from the outside. It is configured as an anti-theft means. On the other hand, the other side of the switch holder 41 that is the switch facing surface side has a function as a case-like switch mounting portion that detachably holds the IG switch portion 40 without hindering the anti-theft function.

  As shown in FIGS. 1 and 2, the switch holder 41 is further integrated with a pedestal 42 for receiving a lock spring 34 disposed at the base end of the lock stopper 32. By adopting a configuration in which the switch holder 41 and the pedestal 42 are integrated, a structure in which components such as the lock bar 31 constituting the steering lock portion 30 are not exposed to the outside can be obtained effectively without increasing the number of components. It is done.

  According to the illustrated example, the IG switch 43 is snap-fit engaged with the switch mounting portion of the switch holder 41. If the switch mounting portion has a concave-convex structure to be coupled to the concave and convex portions, a locking projection or a locking hole is formed in the switch mounting portion of the switch holder 41, and the locking hole or the locking projection is formed in the IG switch 43. It may be configured to form a portion.

  As the switch mounting portion, various mounting structures for detachably holding the IG switch 43 can be adopted. Of course, even if the IG switch 43 is detached from the switch holder 41, the components such as the lock bar 31 are used. It becomes possible to make it the structure which does not expose to the exterior.

  The switch holder 41 can be applied even to a steering lock device having a configuration in which the coil spring 37 is not interposed between the inner bottom surface of the bottomed cylindrical portion 33a of the camshaft 33 and the switch holder 41. Of course, it is possible.

(Operation of steering lock)
In FIG. 4A, the key rotor 23 is in the LOCK position before the mechanical key is inserted. Now, when a mechanical key is inserted into the key rotor 23 through the key insertion hole 23a, the key rotor 23 and the camshaft 33 resist the elasticity of the coil springs 36 and 37 as shown in FIG. Move straight to the side.

  When the key rotor 23 and the camshaft 33 are linearly moved toward the switch holder 41, the lock regulating coil spring 36 has an inner bottom surface of the bottomed cylindrical portion 33a of the camshaft 33 as shown in FIG. And the lock stopper 32 change from a natural state to a compressed state. The coil spring 37 for automatic return changes from the natural state to the compressed state between the inner bottom surface of the bottomed cylindrical portion 33 a of the camshaft 33 and the switch holder 41. The lock spring 34 that biases the lock stopper 32 toward the column shaft 1 remains stationary, and the lock stopper 32 does not operate.

  When the mechanical key inserted into the key insertion hole 23a is rotated, in the process in which the key rotor 23 rotates from the LOCK position to the ON position or the START position via the ACC position, as shown in FIGS. 4 (b) to 5 (b), The camshaft 33 rotates in conjunction with the rotation of the key rotor 23.

  As the camshaft 33 rotates, the cam surface 33d of the camshaft 33 rotates along the cam follower surface 32c of the lock stopper 32. The lock stopper 32 moves linearly in a direction substantially orthogonal to the camshaft 33 against the elasticity of the lock spring 34. The linear movement of the lock stopper 32 is transmitted to the lock bar 31, and the lock spring 34 is gradually bent to be in a compressed state.

  As the cam surface 33d of the camshaft 33 rotates, the cam follower surface 32c of the lock stopper 32 moves from within the rotation locus of the cam surface 33d of the camshaft 33, as shown in FIGS. 4 (c) and 5 (b). break away. The lock pin 35 is detached from the rotation locus of the bottomed cylindrical portion 33a of the camshaft 33, and protrudes and moves to the outer peripheral surface side of the bottomed cylindrical portion 33a of the camshaft 33 due to the elasticity of the lock regulating coil spring 36.

  As shown in FIGS. 4C and 5B, the lock pin 35 elastically contacts the outer peripheral surface of the bottomed cylindrical portion 33a of the camshaft 33 against the elasticity of the lock spring 34. The linear movement of the lock stopper 32 is restricted. The coil spring 37 for automatic return remains in a compressed state.

  On the other hand, as the lock stopper 32 moves linearly, the tip of the lock bar 31 passes through the through hole of the column tube 3 through the through hole 6 a of the lock holder 6 fixed to the column shaft 1. And the lock bar 31 are retracted to the unlock position where the engagement is released. In this unlock position, the rotation of the column shaft 1 is allowed.

  When the operation opposite to the above operation is performed by the mechanical key, the lock pin 35 is moved to the outer peripheral surface of the bottomed cylindrical portion 33a of the camshaft 33 as shown in FIG. Slide along. The lock spring 34 and the coil spring 37 are maintained in a compressed state.

  Now, when the key rotor 23 is in the LOCK position and the mechanical key is pulled out from the key insertion hole 23a of the key rotor 23, the key rotor 23 and the camshaft 33 are connected to the coil spring 37 for automatic return as shown in FIG. The key rotor 23 and the camshaft 33 are automatically returned to the initial positions on the front side of the vehicle body by the elasticity. Since the engagement between the outer peripheral surface of the camshaft 33 and the lock pin 35 is released, the restraint of the lock stopper 32 is released, and the lock spring 34 returns to the natural state.

  By releasing the restraint of the lock stopper 32, the tip of the lock bar 31 is engaged with the through hole 6a of the lock holder 6 fixed to the column shaft 1 through the through hole of the column tube 3, and the column It will be stationary in a steering lock state that prevents the rotation of the shaft 1.

(Effects of the first embodiment)
According to the steering lock device 10 configured as described above, the following effects can be obtained in addition to the above effects.

(1) Since the center line CL ₂ of the center line CL ₁ and the lock stopper 32 of the lock bar 31 of the steering lock portion 30 are offset at intervals _{D 1,} IG switch portion the position of the key insertion hole 23a as a reference The lock holder 6 of the column shaft 1 can be set at a position away from the bearing 2 that rotatably holds the column shaft 1 in the column tube 3 without impairing the functions such as the operability of 40 and the appearance design. it can.

(2) Since the center line CL ₁ of the lock bar 31 is arranged at a position offset to the side surface side from the center line CL ₂ of the lock stopper 32, the IG switch unit 40 is coaxial with the key rotor 23. By arranging it on the rear side of the base end of the lock bar 31, the overall length L of the steering lock device 10 can be set short, and the width W of the steering lock device 10 can be set small. The column cover 5 and the steering lock device 10 can be reduced in size.

(3) Since a fraud prevention means including a switch holder 41 having a function of detachably fixing the opening 11c of the lock body 11 and a function of detachably holding the IG switch 43 is used, the column Combined with the miniaturization of the cover 5 and the steering lock device 10, it is possible to enhance the convenience of switching the switch device and prevent theft.

[Second Embodiment]
Referring to FIGS. 6 to 8, these drawings illustrate one configuration example of the lock mechanism of the steering lock unit 30 in the steering lock device 10 according to the second embodiment. In these drawings, substantially the same members as those in the first embodiment are given the same member names and symbols. Therefore, the detailed description regarding these members is omitted.

  In the first embodiment, the automatic return means has a configuration in which both end faces of the coil spring 37 for automatic return are arranged between the inner bottom surface of the bottomed cylindrical portion 33a of the camshaft 33 and the IG switch portion 40. In the second embodiment, the automatic return means is configured such that one end surface of the coil spring 37 for automatic return on the IG switch portion 40 side is arranged via the catch preventing means. This is different from the first embodiment.

  By the way, when the key rotor 23 and the camshaft 33 are rotated by the rotation operation of the mechanical key inserted into the key insertion hole 23a, the coil spring 37 for automatic return is set as shown in FIGS. 4 (b) and 5 (b). Since the cam shaft 33 rotates around the shaft portion 33 b in a compressed state, a frictional force is easily generated between the cam shaft 33 and the coil spring 37.

  When the peripheral edge of one end surface of the coil spring 37 is caught by the contact surface of the switch holder 41 due to the generation of this frictional force, the rotation of the camshaft 33 in the process of rotating the key rotor 23 from the LOCK position to the ON position or START position via the ACC position. Operation becomes impossible. In particular, when the START position is overrun, the camshaft 33 may not be automatically returned from the START position to the ON position via the coil spring 37, which is not preferable.

  The steering lock portion 30 includes a sliding member that is a hook preventing means for preventing the peripheral edge of one end surface of the coil spring 37 from being caught on the contact surface of the switch holder 41 in the automatic return means of the key rotor 23 and the camshaft 33. In particular, it has a major configuration.

(Configuration of catch prevention means)
As shown in FIG. 6, the hook preventing means includes a flanged sliding cylinder member 50 in which a ring-shaped flange 51 is integrated with one end surface of a half-shaped cylinder portion 52. For the sliding cylinder member 50, it is preferable to select and use a material having good slidability. Although not particularly limited, for example, a synthetic material such as polyacetal (POM) or polybutylene terephthalate (PBT) is used. Resin or the like is used.

  As shown in FIGS. 7 and 8, the sliding cylinder member 50 is held in a holding part formed between the bottomed cylinder part 33 a and the shaft part 33 b of the camshaft 33. The shaft portion 33b of the camshaft 33 is inserted and fixed to the half cylinder portion 52 of the sliding cylinder member 50 via the coil spring 37 so as to be integrally rotatable, and the end surface of the coil spring 37 and the half cylinder portion are fixed. The end face of 52 is joined. One flange 51 is elastically biased toward the contact surface of the switch holder 41 by the coil spring 37 to reduce the friction coefficient on the contact surface of the switch holder 41.

(Other structures for preventing catching)
In the second embodiment, the sliding cylinder member 50 with a flange is illustrated as a typical configuration example of the catch preventing means, but is not limited to the illustrated example. As this catch prevention means, as shown in FIGS. 9 to 11, various configurations formed in a contact surface shape that does not cause catch can be employed. The configuration other than the catch prevention means is the same as that of the second embodiment.

  The catch preventing means in FIG. 9 includes a cylindrical member 53. A shaft portion 33b of the camshaft 33 is inserted and fixed to the cylindrical member 53 via a coil spring 37 so as to be integrally rotatable. One end surface of the cylindrical member 53 is joined to the end surface of the coil spring 37, and the other end surface of the cylindrical member 53 is elastically biased toward the contact surface of the switch holder 41 by the coil spring 37. The friction coefficient at the contact surface is reduced.

  10 includes a plurality of balls 54,..., 54 that are elastically biased by the coil spring 37. The balls 54 are held in the holding portion of the camshaft 33 with a predetermined interval. As the material of the ball 54, it is preferable to select and use a resin material or a metal material having good slidability. For example, a metal such as stainless steel or a member coated with a resin using a metal as a core is used. be able to.

  11 prevents the coil spring 37 and slides a plurality of plate-like leaf springs 55,..., 55 having elastic pieces 55a swelled in a semicircular shape along the circumferential direction. It is provided as a member. Even in the leaf spring 55, similarly to the material of the ball 54, a resin material or a metal material having good slidability can be selected and used.

  As shown in FIG. 11, the leaf springs 55 are arranged on the end surface of the bottomed cylindrical portion 33a on the switch holder 41 side with a predetermined interval. The camshaft 33 excludes a holding space formed between the bottomed cylindrical portion 33a and the shaft portion 33b, and instead of the holding space, the bottomed cylindrical portion 33a faces the switch holder 41 side. The leaf spring 55 is fixed to the end face. As a matter of course, the catch preventing means shown in FIG. 11 may have a configuration in which a plurality of elastic pieces 55a are provided on a single ring plate-like leaf spring 55.

(Effect of the second embodiment)
The steering lock device 10 provided with the catch preventing means in the second embodiment configured as described above has the following effects in addition to the same effects as those of the first embodiment. .

(1) Since the hook prevention means is provided between the inner bottom surface of the bottomed cylindrical portion 33a of the camshaft 33 and the IG switch portion 40, the camshaft 33 can be smoothly moved and rotated in the axial direction. It can be carried out.

(2) The automatic return means can be set without setting the overall length L of the steering lock device 10 to be long.

(3) Since it is not necessary to machine the end face of the coil spring 37 for automatic return, the automatic return means can be manufactured at low cost.

  Note that the hook preventing means is not applied only to the configuration of the steering lock device 10 according to the first embodiment. Needless to say, the steering lock device 10 according to the second embodiment may be configured such that the IG switch 43 is detachably held on the opening end surface of the opening 11c of the lock body 11.

  As is clear from the above description, the steering lock device 10 of the present invention has been described based on the above-described embodiments, modifications, and illustrated examples. However, the present invention is not limited to the above-described embodiments, modifications, and The present invention is not limited to the illustrated example, and can be implemented in various modes without departing from the gist thereof.

  It should be noted that not all the combinations of features described in the above embodiments, modifications, and illustrated examples are necessarily essential to the means for solving the problems of the present invention. .

DESCRIPTION OF SYMBOLS 1 ... Column shaft, 2 ... Bearing, 3 ... Column tube, 4 ... Shock absorption mechanism, 5 ... Column cover, 6 ... Lock holder, 6a ... Lock hole, 10 ... Steering lock apparatus, 11 ... Lock body, 11a ... 1st 11b ... second internal space, 11c ... opening, 12 ... lock body mounting part, 12a ... fitting recess, 12b ... through hole, 13 ... bracket, 14 ... bolt, 20 ... ignition cylinder part, 21 ... Key cylinder, 22 ... Rotor case, 23 ... Key rotor, 23a ... Key insertion hole, 23b ... Fitting shaft part, 24 ... Tumbler, 30 ... Steering lock part, 31 ... Lock bar, 31a ... Locking groove part, 32 ... Lock Stopper, 32a ... locking projection, 32b ... fitting hole, 32c ... cam follower surface, 33 ... camshaft, 33a ... bottomed cylinder, 33b ... Cuff part, 33c ... fitting recess, 33d ... cam surface, 34 ... lock spring, 35 ... lock pin, 36, 37 ... coil spring, 40 ... ignition switch part, 41 ... switch holder, 42 ... pedestal, 43 ... ignition switch , 50 ... sliding cylinder member, 51 ... flange, 52 ... half cylinder part, 53 ... cylindrical member, 54 ... ball, 55 ... leaf spring, 55a ... elastic piece, CL ₁ , CL ₂ ... center line, interval ... D ₁ , D ₂ , L ... full length, W ... width

Claims (7)

A lock body having an opening in which a first internal space formed in the axial direction and a second internal space formed in a direction intersecting the axial direction communicate with each other;
A key rotor housed in the first internal space and rotatable about an axis;
A lock stopper movable into the second internal space;
A camshaft connected to the key rotor so as to be integrally rotatable, and converting the rotational motion of the key rotor into linear motion of the lock stopper;
A lock that is offset in the lateral direction from the center line of the lock stopper and is disposed in the second internal space, the base end portion is held by the lock stopper, and the tip end portion is engageable with and disengageable from the column shaft of the vehicle. Bar,
A switch holder in which one side is fixed to the opening of the lock body in a non-removable manner and the other side holds the switch device in a detachable manner;
A steering lock device comprising:   2. The steering lock device according to claim 1, wherein the switch holder is coaxial with the camshaft and is disposed behind a base end portion of the lock bar. 3.   The steering lock device according to claim 1 or 2, wherein the switch holder is provided with a pedestal for receiving a lock spring disposed at a base end portion of the lock stopper. The camshaft is integrally movable in the axial direction of the key rotor against elasticity with the key inserted.
The steering lock device according to any one of claims 1 to 3, further comprising a catch prevention means for preventing the cam shaft from being caught when elastically contacting the switch holder. The camshaft is mounted with a spring member that is integrally movable and rotatable,
5. The steering lock device according to claim 4, wherein the catch prevention means is constituted by a sliding member disposed between an end face of the spring member and the switch holder. The camshaft includes a cylindrical portion connected to the key rotor so as to be integrally movable and rotatable, and a shaft portion connected to the inner surface of the cylindrical portion,
The steering lock device according to claim 5, wherein the spring member and the sliding member are held between the tube portion and the shaft portion. The camshaft includes a cylindrical portion connected to the key rotor so as to be integrally movable and rotatable, and a shaft portion connected to a switch holder facing surface of the cylindrical portion,
The hook preventing means is constituted by a leaf spring having an elastic piece swelled in a semicircular arc shape, and the leaf spring is fixed to the switch holder facing surface of the cylindrical portion along the peripheral surface of the shaft portion. The steering lock device according to claim 4.

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