JPH09228706A - Steering lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a locking rod from being moved to an unlock position by illegal unlocking operations. SOLUTION: This steering lock device has a key cylinder 16, disposed in such a way as to be movable in the direction of its axis within a casing 11 and rotatably enclosed inside a housing case 12 energized outward by a housing spring, and a rotor that is engaged with the key cylinder 16. The rotor comprises a hanger, having a flange part 43 and a cam 44 and moved up and down by the cam 44, a locking rod 18 that is engaged with the hanger, and a pin 56 that locks the hanger. When the key is rotated from a lock position to an unlock position, the pin 56 is locked with the edge of the rotor, and the hanger and the locking rod are held in unlock positions. When the key is removed from the key cylinder 16, the pin 56 is disconnected from the edge of the rotor as the key cylinder 16 and the rotor move in the direction of their axes, the hanger and the locking rod 18 move to the lock positions, and locking of the pin to the edge of the rod, even with external impact, etc., is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device, and more particularly to a steering lock device for controlling rotation of a steering shaft of an automobile.

[0002]

2. Description of the Related Art As disclosed in, for example, Japanese Patent Laid-Open No. 61-295154, a steering lock for controlling a steering shaft and an ignition switch of an automobile at the same time is used. This steering lock is
A key cylinder housed in the frame and rotated between a locked position and an unlocked position by a key, a cam rotated together with the key cylinder, a locked position for engaging the steering shaft, and an unlocking for releasing this engagement. It has a locking rod which is moved by a cam and a spring between a position and an ignition switch which is operatively connected to the rear of the cam.

When a key is inserted into a key cylinder and rotated, the key can be sequentially rotated to a lock position, an off position, an ACC position, an on position, and a start position for operating a starter motor. If the key is removed at the lock position, the rotation of the key cylinder becomes impossible and the operation of the ignition switch is prohibited, and the locking rod is engaged with the steering shaft, so that the rotation of the steering shaft is prevented to prevent theft.

For example, as disclosed in Japanese Examined Patent Publication No. 3-730, a switch device is known in which a swing lever is provided in the steering lock device to detect a key to be inserted into the steering lock device. With this switch device,
A cylinder lock and an engagement element are provided at a position orthogonal to the key insertion groove of the cylinder lock, one end of the engagement element is exposed in the key insertion groove, and the other end of the engagement element is axially supported outside the cylinder lock. Of the rocking member provided on the switch, the end of the rocking portion on the long side can be freely moved to and from the mover of the switch, and when the key is inserted into or removed from the cylinder lock, the engaging element The action of is expanded by the swing member and transmitted to the mover to operate the switch. This switch device has an advantage that the operation of the engaging element is expanded by the swing member by inserting or removing the key, and the switch is reliably opened and closed.

Japanese Unexamined Patent Publication No. 1-250577 discloses a steering lock device which can detect the insertion of the key by moving the key cylinder in the length direction when the key is inserted and has a small number of parts. With this steering lock device, the key cylinder can be moved with a large stroke by inserting the key using the key detection lever.
The key detection switch built into the ignition switch device can be reliably operated.

In the present automobile, as disclosed in Japanese Patent Laid-Open No. 2-3561, a structure has been proposed in which a key cylinder provided in the steering lock device moves inward when a key is inserted into the steering lock device. There is. In this known steering lock device, when the key is inserted, the key cylinder moves inward, and the insertion of the key is detected by the switch in the ignition switch. In addition, the locking rod moved to the unlocked position by rotating the key,
The locking rod holds the key in the unlocked position until it is removed from the steering lock.

[0007]

In the conventional steering lock device, when a special tool is inserted into the key cylinder to move the flange portion of the rotor to the pressing position and then an impact is applied to the steering lock device, the locking rod is released. There is a risk that it will move to the locked position and thus the pin will be locked above the flange of the rotor and the locking rod will be erroneously held in the unlocked position.

Therefore, it is necessary to develop a steering lock device in which the locking rod is not held in the unlocked position even if an impact is applied in the locked state. For example, Japanese Patent Publication No. 63-
Japanese Laid-Open Patent Publication No. 16296 discloses a steering lock device in which a blocking member that is biased in a protruding direction and supported so as to be retractable is provided on either a drive cam or a sliding member. In this steering lock device, the blocking member blocks the movement of the lock bolt in the unlocking direction by engaging the other of the drive cam or the sliding member without the rotor rotating. However, in this steering lock device, the key cylinder does not move in the axial direction when the key is inserted into the key cylinder. Therefore, in order to prevent the illegal unlocking for the steering lock device in which the key cylinder moves in the axial direction, Must be changed. Also,
As shown in Japanese Utility Model Laid-Open No. 4-74163, a stopper is rotatably attached to a lock member by a pin,
There is also known a steering lock device that engages the stopper projection with the locking projection of the cam member in the locked position and releases the engagement between the locking projection of the cam member and the stopper when the key is rotated. However, even in this steering lock device, the key cylinder does not move in the axial direction when the key is inserted, and a stopper portion must be specially added.

Therefore, according to the present invention, when the key cylinder is moved in the axial direction when the key is inserted and the key cylinder is rotated to the unlocked position, the locking rod is held at the unlocked position and an impact is applied in the locked state. An object of the present invention is to provide a steering lock device that can prevent the locking rod from moving to the unlocked position when the steering rod is opened.

Further, according to the present invention, when the key cylinder is moved in the axial direction when the key is inserted, and the key cylinder is required to be moved in the axial direction when the key cylinder is rotated to the unlock position, an impact is applied in the locked state. An object of the present invention is to provide a steering lock device that can prevent the locking rod from moving to the unlocked position when the steering rod is opened.

[0011]

A steering lock device according to the present invention includes a casing, a cover fixed to a front portion of the casing, and a key disposed in the casing so as to be rotatable and axially movable by a key. A cylinder,
A locking rod that is detachably moved to the steering shaft, a rotor that is rotatably connected to the key cylinder and has a cam, and a rotor that is connected to the locking rod and that is rotated by the cam of the rotor when the rotor rotates. A hanger, a hanger spring that presses the hanger toward the locking position, a pin that is supported in the hanger and projects toward the rotor, and a pin spring that biases the pin toward the rotor. The steering lock device includes a key detection lever arranged inside a key cylinder. A stopper portion having a radially inner surface is formed on the contact surface of the rotor facing the pin. When a key is inserted into the key cylinder, the key detection lever rotates, the key cylinder and rotor move axially inward against the elasticity of the housing spring, and the pin tip is located radially inward of the stopper. To be done. The pins engage the edges of the rotor when the key is rotated from the locked position to the unlocked position and the hanger and locking rod are moved from the locked position to the unlocked position. When the key is moved from the unlocked position to the locked position, the pin engages the edge of the rotor and the hanger and locking rod are held in the unlocked position. When the key is pulled out from the key cylinder, the elastic force of the housing spring moves the key cylinder and the rotor outward in the axial direction, and the elastic force of the hanger spring moves the hanger and the locking rod from the unlocked position to the locked position. Is disengaged. When a shock is applied to the steering lock device in the locked state and the state where the rotor is moved inward in the axial direction, the tip end of the pin comes into contact with the radially inner side surface of the stopper part and the engagement of the edge part of the pin with respect to the rotor. Prevent the combination.

According to the embodiment of the present invention, a housing case that is axially movable between an outer position and an inner position in the casing and rotatably accommodates the key cylinder, and the housing case faces the outer position. Housing spring that urges the housing, a guard plate that is rotatably arranged between the cover and the housing case, a protrusion formed on one of the key cylinder and the housing case, and the other of the key cylinder and the housing case. A cam having a concave portion into which the convex portion fits, a stopper member provided on the key cylinder, a stopper spring for pressing the stopper member radially outward, and a locking projection formed on the housing case. . The guard plate has a cutout portion into which the protrusion of the housing case is fitted. When the key is inserted into the key cylinder, the key rotates the key detection lever and moves the housing case and rotor axially toward the inner position, which releases the engagement between the housing case and the guard plate. Is
The guard plate is rotatable relative to the housing case and holds the housing case in an inward position against the resilience of the housing spring. After moving the housing case to the inner position, the key cylinder can be rotated from the locked position to the unlocked position. When the key cylinder is rotated together with the key from the unlock position to the lock position, the key cylinder and the key cylinder are axially pressed inward at the pressing position to fit the convex portion into the concave portion. After disengagement with the key cylinder, the key cylinder can be rotated to the locked position.

When the key is inserted into the key cylinder, the tip of the pin is pressed against the elastic force of the spring, and the stopper is formed by a protrusion formed on the contact surface of the rotor. For example, the radially inner surface is formed on the radially inner side of the protrusion. In another embodiment, the stopper portion is formed by a recess formed on the contact surface of the rotor, and a radially inner side surface is formed on a radially outer edge of the recess.

The concave portion is formed with an inclined portion which projects radially outward and is continuous with the edge portion. When the key is inserted into the key cylinder, the tip of the pin is pressed against the rotor against the elasticity of the spring. The stopper portion has an inclined surface formed on the outer side in the radial direction, and when the housing case is on the outer side, the pin is arranged on the inner side in the radial direction of the stopper portion.

When the key is inserted into the key cylinder, rotated to the unlocked position, then returned to the locked position and pulled out from the key cylinder, the pin is completely separated from the flange portion of the rotor. Therefore, the hanger and the locking rod smoothly move to the locked position. Further, even if an impact is applied to the steering lock device when the locking rod is in the locked position, the pin abuts on the stopper portion to prevent the locking rod from moving to the unlocked position.

Further, since the housing case and the rotor are surely moved in the axial direction toward the outer position after the key is removed, the engagement between the pin and the rotor is surely released, and the locking rod is moved to the locked position. be able to. In addition, since the key cylinder that is moved inward when the key is inserted can be further pressed to rotate to the lock position, the driver can operate the steering lock device accurately without erroneous operation.

Since the inclined surface is formed on the outside of the stopper portion in the radial direction, the pin slides on the inclined surface due to the elastic force of the hanger spring, and the hanger and the locking rod can be smoothly moved to the locked position.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a steering lock device according to the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a steering lock device 10 according to the present invention includes a casing 11 and a housing case 1 arranged in a cavity 11a of the casing 11.
2 and a cover 13 fixed to the front of the housing case 12. The housing case 12 is provided in the casing 11 so as to be movable in the axial direction between the outer position shown in FIG. 1 and the inner position shown in FIGS. 13 and 14. A key cylinder 16 having a flange portion 15 is rotatably arranged in the hole 14 of the housing case 12, a plurality of tumbler holes 16a are formed in the key cylinder 16, and a tumbler 16b mounted in each tumbler hole 16a. Is urged outward by a tumbler spring (not shown). FIG.
As shown in FIG. 6, the flange portion 15 of the key cylinder 16 is formed with a convex portion 15b. The convex portion 15b abuts the cam 12c of the housing case 12 shown in FIG. 11, and the cam 12c locks the key cylinder 16. It has a recess 12d formed at the pressing position rotated up to about 60 ° in front of the position. When the key cylinder 16 is rotated to the pressing position,
The convex portion 15b can be fitted into the concave portion 12d by pressing the key cylinder 16 against the housing case 12.

As shown in FIG. 2, a guide protrusion 12a and a spring receiving portion 12b are formed on the housing case 12 which is formed in a substantially cylindrical shape. The guide protrusion 12a is slidably arranged in the groove 11b of the casing 11 shown in FIG.
The spring receiving portion 12b is pressed to the outer position toward the cover 13 by the elastic force of the housing spring 20 arranged in the recess 11c (FIG. 1) of the casing 11. The hole 13a formed in the cover 13 is fixed to the casing 11 by a pair of pins 74.

As shown in FIG. 2, the flange portion 15 of the key cylinder 16 is formed with a slot 30 which communicates with a key groove 26 into which a key is inserted and which is perpendicular to the key groove 26. Slot 3
0 is a horizontal slot 31 extending in the radial direction of the key cylinder 16.
And a vertical slot 32 formed at a right angle to the horizontal slot 31 and parallel to the key groove 26.

The key detection lever 33 mounted in the slot 30 has a lever body 34 having a substantially L-shaped rectangular cross section.
It has a pair of pins 35 projecting at a right angle from the lever body 34. The lever body 34 of the key detection lever 33 has one end 3
4a and the other end 34b. Pin 35 to the other end 34b
Is longer than the length from the pin 35 to the one end 34a. Therefore, when the key detection lever 33 rotates about the pin 35, a large movement stroke of the key cylinder 16 can be obtained.
The length up to a and the other end 34b can be arbitrarily set in design.

When the key detection lever 33 is mounted on the slot 30, the lever body 34 is disposed in the horizontal slot 31 and the pin 35 is disposed in the vertical slot 32. Although not shown in detail, the vertical slot 32 has a pin 35 having a circular cross section.
And has a semi-cylindrical shape. Therefore, when the key detection lever 33 is mounted in the slot 30, the lever body 34 is arranged to be swingable in the horizontal slot 32 around the pin 35 arranged in the vertical slot 32.

As shown in FIGS. 1 and 2, the inner wall of the cover 13 is provided with a circular recess 41 into which the guard plate 40 made of hard metal is mounted.
Is rotatably arranged in the circular recess 41 between the housing case 12 and the cover 13, but does not move in the axial direction. The guard plate 40 has a function of preventing the tool from entering when the tool is illegally inserted into the key groove 26 of the key cylinder 16. As shown in FIG. 9 and FIG. 10, the circular guard plate 40 includes a key hole 42 formed in a substantially central portion for inserting a key, a pair of arc-shaped rims 40a formed in a peripheral portion, and a pair of rims. And a notch portion 40b formed between 40a. When the key is not inserted into the steering lock device 10, the guide protrusion 12a of the housing case 12 and each protrusion 38 of the spring receiving portion 12b are fitted into the cutout portion 40b. Also, the guard plate 40
A projection 15a protruding forward from the flange portion 15 of the key cylinder 16 is fitted into the hole 40c formed in the.

As shown in FIGS. 2 and 3, a stopper member 29 is arranged in a tumbler hole 16c formed on the inner end side of the key cylinder 16 so as to be slidable in the radial direction. Is urged toward the outside in the radial direction. As shown in FIG. 3, the stopper member 29 includes a protrusion 45 having an inclined surface 46 and a vertical surface 48, and the protrusion 45 moves in a guide passage 49 formed at the end of the housing case 12. The guide passage 49 is provided with a locking projection 50 having an inclined surface 51 and a vertical surface 52. When the key cylinder 16 is rotated from the locked position to the unlocked position, the inclined surface 46 of the protrusion 45 contacts the inclined surface 51 of the locking protrusion 50 as shown in FIG. 4, and when the key cylinder 16 is further rotated, the stopper spring The stopper member 29 moves inward in the radial direction against the elastic force of 47, and can automatically get over the locking projection 50. When the key cylinder 16 is rotated from the unlock position to the lock position, the vertical surface 48 of the protrusion 45 abuts the vertical surface 52 of the locking protrusion 50 to rotate the key cylinder 16 to the locked position, as shown in FIG. Be blocked. This is the key cylinder 1
It is at a position of about 60 ° from the lock position of No. 6, and when the key cylinder 16 is pushed inward together with the key, the stopper member 2
9, the engagement between the locking projection 50 and the key cylinder 1 is released.
6 can be rotated to the locked position. This allows
The driver can be made aware of the danger of turning to the locked position. The stopper member 29 also prevents the key cylinder 16 from moving outward from the housing case 12.

The movable piece 71 of the key detection switch 70 attached to the casing 11 is engaged with the housing case 12 and is moved integrally with the housing case 12 when the key is inserted, so that the key detection switch 70 is turned on and off. It can be performed.

The inner end portion 17 of the key cylinder 16 has a connecting portion 17a protruding in the axial direction and a bent portion 17b protruding laterally from the connecting portion 17a. The key cylinder 16 is pressed toward the cover 13 by the cylinder spring 27 arranged in the hole 24 of the rotor 23. As shown in FIG. 7, the bent portion 17b of the key cylinder 16 having a non-circular cross section engages with the inner protrusion 24a formed in the hole 24 of the rotor 23, and the rotor 23 rotates integrally with the key cylinder 16. When the key cylinder 16 moves in the axial direction when the key is removed from the key cylinder 16, the bent portion 17
b engages the inner protrusion 24a to move the rotor 23 integrally in the axial direction.

The rotor 23 has a flange portion 43, a cam 44 connected to the flange portion 43, and a rear end portion 44a extending from the cam 44 and connected to the ignition switch 80. The hook portion 1 is attached to the locking rod 18 that is attached so as to be able to move forward and backward from the hole 19 of the casing 11.
8a (FIG. 2) is formed and the hook portion 18a is formed by a known method.
The hanger 53 is connected to. The hanger 53 has a driven portion 54 that abuts the cam 44 of the rotor 23, and a through hole 55 into which the pin 56, the pin spring 57 and the plug 58 are mounted. As shown in FIGS. 1 and 2, the pin 56 projects toward the flange portion 43 of the rotor 23 by the pin spring 57. Hanger 53 and locking rod 1
8 is pressed toward the locked position by a hanger spring 60 arranged between the hanger 53 and the cap 59.

As shown in FIGS. 1 and 8, a stopper portion 73 is formed at the outer edge in the radial direction above the contact surface 43a of the flange portion 43 of the rotor 23. The stopper portion 73 has a slightly arcuate rectangular shape as shown in FIG. 8, and an inclined surface 73a is formed on the upper side of the stopper portion 73 as shown in FIG.
A radially inner surface 73b is formed on the lower side.

When assembling the steering lock device 10, after disposing necessary parts in the casing 11 in an assembled state, the cover 13 is fixed by the pins 74 and the periphery of the cap 59 is caulked to fix the cap 59. In addition, an ignition switch 80 including a key detection switch is mounted in the recess 65 of the casing 11.

When the key 28 is inserted into the key groove 26 of the key cylinder 16 of the steering lock device 10 in the locked position shown in FIG. 1, the tip of the key 28 is located at the key detection lever 33 as shown in FIGS. 13 and 14. The one end 34a of the lever body 34, which projects into the key groove 26, abuts. Therefore, the key detection lever 33 shown in FIG. 1 is rotated counterclockwise as shown in FIG. 13, and the other end 34b of the lever main body 34 is rotated.
Presses the inner surface of the guard plate 40. Therefore, the key cylinder 16 is moved to the inner position while the key detection lever 33 rotates. As the key cylinder 16 moves in the axial direction, the housing case 12 and the rotor 23 in contact with the housing case 12 also move in the axial direction against the elasticity of the housing spring 20. Therefore, the guide protrusion 12a of the housing case 12 and each protrusion 38 of the spring receiving portion 12b are moved in the axial direction from the state of being fitted into the notch 40b of the guard plate 40, and the fitting is released. Further, when the housing case 12 moves in the axial direction, the movable piece 71 of the key detection switch 70 moves to the housing case 12.
The key detection switch 70 is turned on by being moved together with the guide protrusion 12a. In addition, as shown in FIG.
The flange portion 43 of 3 presses the pin 56 against the elasticity of the pin spring 57. Even if the key 28 is inserted into the key cylinder 16, the guard plate 40 remains in the key detection lever 33.
It does not move in the axial direction because it abuts on the other end. Protrusion 15
In the state in which a is mounted in the hole 40c, the card plate 4
Although 0 is integrated with the key cylinder 16, when the key 28 is inserted into the guard plate 40 and the key cylinder 16,
The key cylinder 16 is moved in the axial direction by the key detection lever 33, and the projection 15a is separated from the hole 40c. However, since the key 28 is inserted into the key hole 42 of the guard plate 40 and the key cylinder 16, the guard plate 40 rotates integrally with the key cylinder 16.

Next, when the key cylinder 16 is rotated together with the key 28 from the locked position to the unlocked position, the rotor 2
3 rotates, the driven portion 54 of the hanger 53 is rotated.
Is moved from the locked position to the unlocked position by the cam 44, and the locking rod 18 is disengaged from the steering shaft. When the key cylinder 16 is completely rotated to the unlocked position, the hanger 53 moves sufficiently upward and the pin 5
6 moves from the lower position shown in FIG. 8 to the upper position shown in FIG. When the pin 56 moves above the flange portion 43 of the rotor 23, it is projected above the flange portion 43 by the elastic force of the pin spring 57. Here, the ignition switch 80 can be turned on.

After that, when the key cylinder 16 is rotated together with the key 28 from the unlocked position to the locked position, when the key cylinder 16 is rotated from the unlocked position by a certain angle, the vertical surface 48 of the protrusion 45 of the housing case 12 as shown in FIG. It abuts the vertical surface 52 of the locking projection 50 to prevent the key cylinder 16 from rotating to the locked position. At this time, as shown in FIG. 12, the convex portion 15b of the key cylinder 16 can be fitted into the concave portion 12d of the housing case 12. Then, when the key cylinder 16 is pressed inward together with the key 28, the bent portion 17b of the key cylinder 16 moves within the gap 25 of the rotor 23 against the elasticity of the cylinder spring 27. Therefore, the engagement between the stopper member 29 and the locking projection 50 is released, and the key cylinder 16 can be rotated to the lock position. Since the protrusion 38 of the housing case 12 is in contact with the rim 40a of the guard plate 40, it does not protrude outward regardless of the movement of the key cylinder 16.

When the key is removed from the key cylinder 16,
The housing case 12, the key cylinder 16 and the rotor 23 are axially returned to the initial position shown in FIG. 1 by the elastic force of the housing spring 20, and the key detection lever 33 is also returned to the position shown in FIG. One end projects into the key groove 26. Further, the movable piece 71 of the key detection switch 70 moves to the initial position again as shown in FIG. 1 and is switched from the ON state to the OFF state. When the key 28 is removed from the key cylinder 16, the housing case 12 moves in the axial direction, and the pin 56 locked to the flange portion 43 moves downward along the inclined surface 73a of the stopper portion 73 due to the elasticity of the hanger spring 60. It is pushed by, gets over the stopper portion 73, and is moved to the locking position shown in FIG. Since the inclined surface 73a is formed on the outer side of the stopper portion 73 in the radial direction, the pin 56 slides on the inclined surface 73a by the elastic force of the hanger spring 60, and the hanger 53 and the locking rod 18 can be smoothly moved to the locked position. You can Since the engagement between the pin 56 and the flange portion 43 is released in this way, the hanger 53 and the locking rod 18 are released.
Is moved from the unlocked position to the locked position against the elasticity of the hanger spring 60. Therefore, the hanger 53 and the locking rod 18 are securely held at the unlocked position until the key is removed from the key cylinder 16.

As shown in FIG. 1, when the key 28 is not inserted into the steering lock device 10 and the locking rod 18 is in the locking position, the tip of the pin 56 has a stopper portion 73.
Is within the projecting range of the radially inner surface 73b. As shown in FIGS. 13 and 14, when the key 28 is inserted into the steering lock device 10, the flange portion 43 moves and the pin 5
The tip of 6 contacts the contact surface 43a of the flange portion 43.
As shown in FIG. 1 or FIG. 13, when the locking rod 18 is in the locked position, the pin 56 stays in the radial direction of the stopper portion 73 even if a shock is applied to the steering lock device 10 regardless of whether the key 29 is inserted or not. Since it abuts against the side surface 73b, the pin 56 cannot pass over the stopper portion 73, and the locking of the pin 56 with the edge portion 43b of the flange portion 43 and the movement of the locking rod 18 to the unlocked position are prevented.

18 to 23 show another embodiment of the present invention. In this embodiment, the stopper portion 73 is formed by a substantially U-shaped cutout portion 75 as shown in FIG.
Along the contour of the cutout portion 75, the stopper portion 73 is formed on the outer edge in the radial direction.
A radial inner surface 73b is formed. In the embodiment of FIGS. 18 to 23, the stopper portion 73 is separated from the tip of the pin 56 in the axial direction when the key 28 is not inserted into the steering lock device 10. When the key is inserted into the steering lock device 10, the tip of the pin 56 is fixed to the radially inner surface 73b.
It is arranged below. Therefore, the pin 56 contacts the contact surface 43a of the flange portion 43 and the locking rod 18
Even when an impact is applied to the steering lock device 10 when the is in the locked position, the pin 56 contacts the radially inner surface 73b of the stopper portion 73. Therefore, the pin 56 is prevented from being locked to the edge portion 43b of the flange portion 43, and the movement of the locking rod 18 to the unlocked position is prevented.

When the key 28 is inserted into the key cylinder 16 and rotated to the unlocked position, the cam 44 rotates, so that the pin 5
6 does not come into contact with the stopper portion 73, but rises, and projects and locks at the edge portion 43b. After that, when the key 28 is returned to the locked position and the key 28 is pulled out from the key cylinder 16, the pin 5
6 is completely separated from the stopper portion 73 of the flange portion 43 in the axial direction. Therefore, the hanger 53 and the locking rod 18 are smoothly moved to the locked position by the elasticity of the hanger spring 60. When the contact surface 43a (recess) is formed with a slanted portion that communicates with the edge, the tip of the pin 56 is locked to the edge at the unlocked position without contacting the contact surface 43a when the key is inserted. it can.

In this embodiment, since the housing case 12 and the rotor 23 are reliably moved in the axial direction when the key is removed, the locking rod 18 can be reliably moved to the locked position after the key is removed. Also, key 2
Since the key cylinder 16 shown in FIG. 22 which is moved inward when 8 is inserted can be further pressed to rotate to the lock position as shown in FIG.
Can be operated accurately without erroneous operation. Further, since the key detection switch 70 can be operated by moving the housing case 12, the key detection switch 70 is attached to the outside of the middle portion of the casing 11 which is separated from the entrance of the key cylinder 16 and does not interfere with the dashboard of the automobile. It is not necessary to use a swinging member, a check lever, a dog, or the like as in the related art, and there are advantages that the number of parts is reduced and the degree of freedom of layout around the steering lock device 10 is increased.

When the key 28 rotates together with the key cylinder 16, the key cylinder 16 rotates together with the key detecting lever 33 and the guard plate 40, and the other end of the key detecting lever 33 always contacts the guard plate 40. Therefore, damage such as wear does not occur in the key detection lever 33, and the key 28 can be rotated smoothly. Thus, when the key 28 is pulled out from the key cylinder 16, the housing spring 20 moves the key cylinder 16, the housing case 12, and the rotor 23 toward the cover 13, and rotates the key detection lever 33 and detects the key. There are three effects of turning switch 70 off.

The embodiment of the present invention is not limited to the above-mentioned embodiment and can be modified. For example, as shown in FIG. 24, the rim 40a may be removed from the guard plate 40 and the notch 40b may be formed as a recess. By forming the convex portion 15b on the key cylinder 26, the housing case 12
Instead of forming the cam 12c on the housing case 1,
It is also possible to form a convex portion on 2 and form a cam on 16 on the key cylinder. When locked, the notch 4 of the guard plate 40
0b and the protrusion 38 engage with each other, the hole 40c formed in the guard plate 40 and the protrusion 15a protruding forward from the key cylinder 16 may be omitted. The tip end of the pin 56 in FIG. 1 may be outside the projection range of the radially inner side surface 73b of the stopper portion 73, and the inclined surface 73a may be omitted. vice versa,
In FIG. 18, the stopper portion 73 may be within the protruding range to form an inclined surface.

[0041]

As described above, according to the present invention, when the key is inserted, the key cylinder moves in the axial direction, and when the key cylinder rotates to the unlocked position, the steering lock device holds the locking rod at the unlocked position. In addition, it is possible to prevent the locking rod from moving to the unlocked position when an impact is applied in the locked state, and to prevent unauthorized unlocking. Also, when the key is inserted, the key cylinder that is moved inward can be pressed further to rotate to the locked position,
The driver can operate the steering lock device accurately without erroneous operation. Furthermore, since the key detection switch can be operated by moving the housing case, the key detection switch can be attached to the outside of the middle part of the casing that is separated from the entrance of the key cylinder and does not interfere with the dashboard of the automobile. Since there is no need to use a rocking member, a check lever, a dog, or the like, there are advantages that the number of parts is reduced and the degree of freedom of layout around the steering lock device is increased. When the key rotates together with the key cylinder, the key cylinder rotates together with the key detecting lever and the guard plate, and the other end of the key detecting lever always contacts the guard plate. Therefore, damage such as wear does not occur on the key detection lever, and the key can be smoothly rotated. Further, there is an advantage that the present invention can be easily implemented by changing only the shape of the flange portion of the rotor of the conventional steering lock device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a steering lock device according to the present invention.

FIG. 2 is an exploded perspective view of the steering lock device according to the present invention.

FIG. 3 is a sectional view showing a stopper member.

FIG. 4 is a cross-sectional view showing a state where the stopper member rides over the protrusion of the housing case.

FIG. 5 is a cross-sectional view showing a state where the stopper member abuts on the protrusion of the housing case.

FIG. 6 is a partial sectional view of a front portion of a steering lock device according to the present invention.

FIG. 7: Side view of rotor

FIG. 8 is a side view showing the relationship between the hanger pin and the rotor flange in the locked position.

FIG. 9 is a perspective view of a guard plate.

FIG. 10: Rear view of guard plate

FIG. 11 is a development view showing the relationship between the protrusion of the key cylinder and the recess of the housing case.

FIG. 12 is a development view showing the relationship between the protrusion of the key cylinder at the pressing position of the key cylinder and the recess of the housing case.

13 is a sectional view showing a state in which a key is inserted in the steering lock device of FIG.

FIG. 14 is a sectional view showing a state in which the key cylinder is rotated to a pressing position.

FIG. 15 is a cross-sectional view showing a fitted state of the guard plate and the housing case.

FIG. 16 is a sectional view showing a state in which the fitting between the guard plate and the housing case is released.

FIG. 17 is a side view showing a state in which a hanger pin is locked to a rotor flange portion.

FIG. 18 is a sectional view showing another embodiment of the steering lock device according to the present invention.

FIG. 19 is a side view showing the relationship between the hanger pin and the rotor flange in the locked position.

FIG. 20 is a partial cross-sectional view of the rotor

FIG. 21 is a sectional view showing a state where a key is inserted.

FIG. 22 is a cross-sectional view showing a state in which a hanger pin is locked to a rotor flange portion.

FIG. 23 is a cross-sectional view showing a state where the key cylinder is pressed together with the key.

FIG. 24 is a perspective view showing another embodiment of the guard plate.

[Explanation of symbols]

10. . 10. steering lock device, . Casing, 12. . Housing case, 12a. . Cavity, 12d. . Recess, 13. . Cover, 14
a. . Tumbler groove, 15b. . Convex part, 16. . Key cylinder, 16b. . Tumbler, 18. . Locking rod, 23. . Rotor, 25. . Gap, 2
9. . Stopper member, 33. . Key detection lever, 4
0. . Guard plate, 44. . Cam, 53. . Hanger, 56. . Pin, 60. . Hanger spring,
73. . Stopper portion, 73a. . Inclined surface, 73
b. . Radial inner surface,

Claims (7)

[Claims] 1. A casing, a cover fixed to a front portion of the casing, a key cylinder rotatably and axially movable in the casing, and a steering shaft detachably movable. Locking rod, a rotor that is rotatably connected to the key cylinder and has a cam, a hanger that is connected to the locking rod and that is moved to the unlock position by the cam of the rotor when the rotor rotates, and the hanger is in the locked position. In a steering lock device including a hanger spring that presses toward a rotor, a pin that is supported in the hanger and protrudes toward a rotor, and a pin spring that urges the pin toward the rotor, a key arranged in a key cylinder. A stopper having a detection lever and having a radially inner surface on the contact surface of the rotor facing the pin. When the key is inserted into the key cylinder, the key detection lever rotates, the key cylinder and rotor move axially inward against the elasticity of the housing spring, and the tip of the pin is the diameter of the stopper. Located inside in the direction, when the key is rotated from the locked position to the unlocked position and the hanger and locking rod are moved from the locked position to the unlocked position, the pin engages with the edge of the rotor and unlocks the key. When moved from the position to the locked position, the pin engages with the edge of the rotor, the hanger and locking rod are held in the unlocked position, and when the key is pulled out of the key cylinder, the elasticity of the housing spring causes the key cylinder and rotor to pivot. When the hanger and the locking rod move from the unlocked position to the locked position due to the elasticity of the hanger spring, When the shock is applied to the steering lock device while the rotor and pin are disengaged and the rotor is moved inward in the locked state, the tip of the pin hits the radial inner surface of the stopper. A steering lock device, wherein the steering lock device is in contact with the rotor to prevent engagement of the edge portion of the pin with the rotor. 2. A housing case which is axially movable between an outer position and an inner position in a casing and rotatably accommodates a key cylinder, and a housing which urges the housing case toward the outer position. The spring, the guard plate rotatably arranged between the cover and the housing case, the protrusion formed on one of the key cylinder and the housing case, and the protrusion formed on the other of the key cylinder and the housing case. The guard plate is provided with a cam having a concave portion to be fitted, a stopper member provided on the key cylinder, a stopper spring for pressing the stopper member radially outward, and a locking projection formed on the housing case. Has a notch to which the projection of is fitted, and the key is inserted when the key is inserted into the key cylinder. -Rotates the key detection lever to move the housing case and rotor axially toward the inner position, which releases the engagement between the housing case and the guard plate, and the guard plate with respect to the housing case. It is possible to rotate relative to each other, hold the housing case in the inner position against the elasticity of the housing spring, and after moving the housing case to the inner position, rotate the key cylinder from the locked position to the unlocked position. When the key cylinder is rotated together with the key from the unlock position to the lock position, the key cylinder and the key cylinder are pushed axially inward at the pressing position to fit the convex portion into the concave portion, and thereby the locking protrusion. After releasing the engagement with the stopper member, the key cylinder can be rotated to the locked position. Steering lock device according to claim 1. 3. When the key is inserted into the key cylinder, the tip of the pin is pressed by the rotor against the elastic force of the spring, and the stopper is formed by a protrusion formed on the contact surface of the rotor. The steering lock device according to claim 1, wherein a radially inner surface is formed radially inward. 4. The steering lock device according to claim 1, wherein the stopper portion is formed by a recess formed in the contact surface of the rotor, and a radial inner surface is formed at a radially outer edge of the recess. 5. The steering lock device according to claim 4, wherein the concave portion is formed with an inclined portion that projects radially outward and is continuous with the edge portion. 6. The steering lock device according to claim 4, wherein when the key is inserted into the key cylinder, the tip of the pin is pressed against the rotor against the elastic force of the spring. 7. The steering lock device according to claim 1, wherein the stopper portion has an inclined surface formed radially outward, and the pin is arranged radially inside the stopper portion when the housing case is outside. .