JPH09112099A - Steering lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts by detecting insertion of a key by moving a key cylinder in the axial direction, moving the key cylinder when the key is extracted and moving a locking rod to a locking position. SOLUTION: When a key is inserted into a key cylinder 16, a key detection lever revolves and a key detection switch 70 works and detects insertion of the key, and a housing case 12, the key cylinder 16 and a rotor moves in the axial direction against springing force of a housing spring. When the key is rotated from a locking position to an unlocking position, a pin 56 is engaged with an edge part of the rotor, and a hanger and a locking rod 18 are held at the unlocking position. When the key is extracted at the locking position, the housing case 12, the key cylinder 16 and the rotor moves in the axial direction, engagement of the rotor and the pin 56 is released, the locking rod 18 moves to the locking position, and rotation of a steering shaft is prevented. Consequently, it is possible to improve operability.

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 In a current automobile, a steering lock for controlling a steering shaft and an ignition switch of the automobile at the same time is used as disclosed in, for example, Japanese Patent Application Laid-Open No. 61-295154. The steering lock is housed in a frame and rotated by a key between a locked position and an unlocked position, a cam rotated together with the key cylinder, a locked position engaged with the steering shaft, and this engagement. A locking rod that is moved by the cam and spring to an unlocked position to be released, and an ignition switch operatively connected behind 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. 1-2500757 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. In this steering lock device, the key cylinder can be moved with a large movement stroke by inserting the key using the key detection lever, and the key detection switch built in the ignition switch device can be reliably operated.

Japanese Utility Model Laid-Open No. 6-83517 discloses a vehicle key device having a key push-in detection mechanism which has a simple structure and in which dust or the like is unlikely to enter. In this key device, a radial guide hole provided in the receiving portion of the rotor,
A taper formed on the outer peripheral surface of the rotor so that the slider slidingly fitted in the guide hole and the axial inner end of the slider come into contact with each other in order to convert the axial displacement of the rotor into the radial displacement of the slider. The switch means having a cam and detecting the axial displacement of the rotor is provided at a position where the actuator contacts the axially outer end surface of the slider. In this key device, AC
When the key is pressed in the C position, the switch is turned on by the cam, and the lock mechanism for prohibiting the rotation of the rotor to the lock position is operated.

[0007]

However, in a conventional steering lock device for axially moving a key cylinder when a key is inserted, a locking rod is used as disclosed in Japanese Patent Laid-Open No. 1-250577. The locking rod was held in the unlocked position until the key was pulled out from the key cylinder, but there was a danger that the locking rod would loosen in the sleeve arranged in the casing and would not operate reliably. Further, the number of parts constituting the conventional steering lock device that moves the key cylinder in the axial direction when inserting the key cannot be reduced.

Therefore, according to the present invention, when the key is inserted, the key cylinder moves axially to detect the insertion of the key, and when the key is removed from the key cylinder, the locking rod can surely move to the lock position. An object of the present invention is to provide a steering lock device having a small number of parts.

[0009]

A steering lock device according to the present invention includes a casing (11) and a key cylinder (16) arranged in the casing (11) so as to be rotatable by a key and axially movable. A locking rod (18) that is detachably moved to the steering shaft, a rotor (23) that is integrally rotatably connected to the key cylinder (16) and has a cam (44), and a locking rod (1).
8) and connected to the rotor (2) when the rotor (23) rotates.
The hanger (5) moved to the unlocking position by the cam (44) of 3)
3), a hanger spring (60) for pressing the hanger (53) toward the locking position, a pin (56) elastically protruding from the hanger (53), and a casing (11) at the front of the key cylinder (16). ) Fixed to the cover (13),
The key cylinder (16) is rotatably attached to the front part and is rotated when a key is inserted into the key cylinder (16) to apply a reaction force to the cover (13) to cover the key cylinder (16). And a key detection lever (33) for moving in a direction separating from (13).

In this steering lock device, the key cylinder (16) is arranged so as to be movable in the axial direction between an outer position and an inner position in the casing (11) and is rotatable and axially movable. A housing case (12) including a cavity (12a) for accommodating and a tumbler groove (14a) through which the tumbler (16b) of the key cylinder (16) protrudes;
A housing spring (20) for pressing the housing case (12) toward the cover (13) is provided. When the key is inserted into the key cylinder (16), the key detection lever (33) rotates, resisting the elasticity of the housing spring (20) and the housing case (12) and the key cylinder (16).
And the rotor (23) moves axially inward and the pin (56)
Is pressed by the rotor (23). When the key is rotated from the locked position to the unlocked position and the hanger (53) and locking rod (18) are moved from the locked position to the unlocked position,
The pin (56) can be engaged with the edge portion of the rotor (23). When the key is moved from the unlocked position to the locked position, the pin (56) engages the edge of the rotor (23) and the hanger (53).
And the locking rod (18) is held in the unlocked position. When the key is removed from the key cylinder (16), the elasticity of the housing spring (20) causes the key detection lever (33) to rotate, and the housing case (12), key cylinder (16), and rotor (23) move axially. The rotor (23) is disengaged from the pin (56), and the hanger (53) and the locking rod (18) are moved from the unlocked position to the locked position by the elastic force of the hanger spring (60). It

In the embodiment of the present invention, the rotor (23) is integrally rotatably connected to the key cylinder (16).
Are arranged in the casing (11) with a gap (25) in the axial direction and movable in the axial direction with respect to the key cylinder (16). Cylinder spring (27) that presses the key cylinder (16) toward the cover (13) is attached to the key cylinder (1
6) and the rotor (23), the key cylinder (1
When the 6) is rotated from the unlocked position to the locked position, it is locked in the housing case (12) and the key cylinder (1
The key cylinder (16) is provided with a stopper member (29) for preventing the rotation of 6). When the key cylinder (16) is pushed inward in the axial direction, the stopper member (29) and the housing case (12) are disengaged from each other, and the key cylinder (16)
Can be rotated to the locked position.

A protrusion (15b) is formed on one of the key cylinder (16) and the housing case (12), and a recess (12d) is formed on the other, so that the key cylinder (16) is moved from the unlocked position to the locked position. The convex portion (15b) and the concave portion (12d) are aligned with each other during rotation to press the key cylinder (16) inward in the axial direction, and the convex portion (15b) can be fitted into the concave portion (12d). A key detection switch (70) operated by a housing case (12) that moves axially inward when the key is inserted into the key cylinder (16) is attached to the casing (11).

A guard plate (40) is rotatably arranged between the cover (13) and the housing case (12).
Stopper member (29) provided on the key cylinder (16)
Is pressed radially outward by a stopper spring (47), and a locking projection (50) is formed on the housing case (12). The housing case (20) is non-rotatably supported in the casing (11). The guard plate (40) has a notch (40b) into which the projection (38) of the housing case (12) is fitted.

When the key is inserted into the key cylinder (16), the key rotates the key detection lever (33) to move the housing case (12) and the rotor (23) axially toward the inner position. , This allows the housing case (1
The engagement between 2) and the guard plate (40) is released. The guard plate (40) is rotatable relative to the housing case (12) and the housing case (1
Hold 2) in the inner position against the elasticity of the housing spring (20). After moving the housing case (12) to the inner position, the key cylinder (16) can be rotated from the locked position to the unlocked position.
When the key is rotated together with the key from the unlocked position to the locked position, the key cylinder (16) is pressed inward in the axial direction together with the key in the unlocked position to fit the protrusion (15b) into the recess (12d). Thus, the key cylinder (16) can be rotated to the lock position after the engagement between the locking projection (50) and the stopper member (29) is released.

When the key is inserted into the steering lock device, the key engages with one end of the key detection lever (33),
Rotate the key detection lever (33). Therefore, the other end of the key detection lever (33) moves the key cylinder (16), the housing case (12), and the rotor (23) inward while applying a reaction force to the cover (13) to move the housing case (12). The key detection switch (70) attached to the casing (11) is activated by the movement of the.

When the key is rotated together with the key cylinder (16) from the locked position to the unlocked position, the cam (44) of the rotor (23) causes the locking rod (18) to be engaged with the hanger (53) and the steering shaft. It is moved away from the steering shaft to the unlocked position.
When the key cylinder (16) is sufficiently moved to the unlocked position, the pin (56) provided on the hanger (53) will move to the rotor (2
It will be locked in 3).

When the key together with the key cylinder (16) is rotated from the unlock position to the lock position, the stopper member (29) engages with the housing case (12) before reaching the lock position, and the rotation to the lock position is prevented. Be blocked. Therefore,
When the key is pressed in the axial direction together with the key cylinder (16),
The engagement between the stopper member (29) and the housing case (12) is released, and the key can be rotated together with the key cylinder (16) to the locked position. After rotating the key cylinder (16) to the lock position, remove the key from the key cylinder (16), and due to the elasticity of the housing spring (20),
The housing case (12), the key cylinder (16) and the rotor (23) are moved in the axial direction toward the cover (13). Therefore, the pin (56) of the hanger (53) and the rotor (2
The engagement with 3) is released, the hanger (53) and the locking rod (18) move to the locked position by the elastic force of the hanger spring (60), and the locking rod (18) can be engaged with the steering shaft. Key to key cylinder (1
Since the housing case (12) is returned to the initial position by removing it from 6), the key detection switch (70) is turned off. The housing case (12) and the rotor (23) are surely moved in the axial direction when the key is removed. Therefore, after the key is removed, the engagement between the pin (56) and the rotor (23) is surely released. The locking rod (18) can be moved to the locked position. Further, the key cylinder (16), which is moved inward when the key is inserted, can be further pressed to rotate to the lock position, so that the driver can operate the steering lock device accurately without erroneous operation.

When the key cylinder (16) is rotated after inserting the key into the key cylinder (16), the guard plate (40) causes the housing case (12) to resist the elasticity of the housing spring (20). The key cylinder (16) is pushed toward the housing case (12) at the unlocked position, and the stopper member (2
The engagement between the 9) and the locking projection (50) is surely released, and the key cylinder (12) can be rotated to the lock position.

[0019]

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, the steering lock device 10 of the present invention includes a casing 11 and a casing 11.
The housing case 12 is disposed in the hollow portion 11a so as to be movable in the axial direction, and the cover 13 fixed to the front portion of the housing case 12. Housing case 12
A key cylinder 16 having a flange portion 15 is rotatably disposed in the hole 14 of the tumbler 16b.
A tumbler groove 14a is formed to project. The housing case 12 has the outer position shown in FIG.
It is provided in the casing 11 so as to be movable in the axial direction between the inner position shown in FIG. As shown in FIG. 10, a plurality of tumbler holes 16a is formed in the key cylinder 16, and a tumbler 16b is mounted in each tumbler hole 16a in a known manner.

As shown in FIG. 4, 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, and the spring receiving portion 12b is pressed toward the cover 13 by the elasticity of the housing spring 20 arranged in the recess 11c of the casing 11. The hole 13a formed in the cover 13 is fixed to the casing 11 by a pair of pins 74 shown in FIG.

As shown in FIG. 4, a slot 30 is formed in the flange portion 15 of the key cylinder 16 so as to communicate with a key groove 26 for inserting a key and at a right angle thereto. 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.

A key detection lever 33 is attached to the slot 30. The key detection lever 33 includes a lever body 34 having a substantially L-shape with a rectangular cross section, and a pair of pins 35 projecting from the lever body 34 at right angles. The lever main body 34 of the key detection lever 33 has one end 34a and the other end 34b.
The length from the 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. However, the length from the pin 35 to the one end 34a and the other end 34b is arbitrary in design. Can be set to Inside the lateral slot 31, substantially V-shaped radial walls 36 and 37 are formed, and the lever main body 34 of the key detection lever 33 abuts either of the walls 36 or 37 before and after the rotation. Also, the key detection lever 33
An inclined surface 12e is formed on the front portion of the housing case 12 in order to avoid contact with.

When the key detection lever 33 is mounted in the slot 30, the lever body 34 is arranged in the horizontal slot 31 and the pin 35 is arranged 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 FIG. 6, the inner wall of the cover 13 is provided with a circular recess 41 into which a half-moon shaped guard plate 40 made of hard metal is mounted.
It is rotatably arranged in the circular recess 41 between 1 and the cover 13, but does not move axially. Guard plate 4
0 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. The guard plate 40 is formed with a hole 42 into which the protrusion 15a protruding forward from the flange portion 15 of the key cylinder 16 is fitted. The card plate 40 is integrated with the key cylinder 16 in a state where the protrusion 15a is mounted in the hole 42. When a key is inserted into the key cylinder 16, the key cylinder 16 moves axially by the key detection lever 33,
Although the projection 15a is separated from the hole 42, the guard plate 40 rotates integrally with the key cylinder 16 because the key is inserted into the guard plate 40 and the key cylinder 16.

A stopper member 29 is arranged in the tumbler hole 16c formed on the inner end side of the key cylinder 16 so as to be slidable in the radial direction. As shown in FIG. 22, the stopper member 29 is biased radially outward by the stopper spring 47. The stopper member 29 includes a projection 45 having an inclined surface 46 and a vertical surface 48, and the projection 45 moves in a guide passage 49 formed at an end of the housing case 12. The guide passage 49 has an inclined surface 51 and a vertical surface 52.
Is provided. Key cylinder 16
When the is rotated from the locked position to the unlocked position, FIG.
As shown in FIG. 7, when the inclined surface 46 of the projection 45 contacts the inclined surface 51 of the locking projection 50 and the key cylinder 16 is further rotated, the stopper member 29 moves radially inward against the elasticity of the stopper spring 47. Then, it is possible to automatically get over the locking projection 50. When the key cylinder 16 is rotated from the unlocked position to the locked position, the vertical surface 48 of the projection 45 is changed to the vertical surface 52 of the locking projection 50 as shown in FIG.
And rotation of the key cylinder 16 to the lock position is prevented. This is a position about 60 degrees from the locked position of the key cylinder 16. When the key cylinder 16 is pressed inward together with the key, the engagement between the stopper member 29 and the locking projection 50 is released, and the key cylinder 16 is locked. Can be rotated into position. The stopper member 29 also prevents the key cylinder 16 from moving outward from the housing case 12.

The key detection switch 70 attached to the casing 11 has a movable piece 71 protruding into the casing 11 and having a rounded tip portion 72. The round tip 72 of the movable piece 71 is a guide projection 12a of the housing case 12.
Abut the round contact end 73. Housing case 12
When is moved inward in the axial direction, the movable piece 71 is pressed by the contact end portion 73 of the housing case 12, and the key detection switch 70 is turned on.

As shown in FIG. 4, the inner end portion 17 of the key cylinder 16 has an axially projecting connecting portion 17a and a connecting portion 1.
And a bent portion 17b protruding laterally from 7a. The inner end portion 17 is rotatably mounted in the casing 11 and is axially provided with a gap 25 (FIG. 2) in a hole 24 of a rotor 23 arranged coaxially with the key cylinder 16. Rotor 2
The key cylinder 16 is pressed toward the cover 13 by a cylinder spring 27 arranged in the third hole 24. The bent portion 17b of the non-circular cross section of the key cylinder 16 engages with an inner projection 24a formed in the hole 24 of the rotor 23, and the rotor 23 rotates integrally with the key cylinder 16 and removes the key from the key cylinder 16. When the key cylinder 16 moves in the axial direction, the bent portion 17b engages with the inner protrusion 24a to move the rotor 23 integrally in the axial direction.

As shown in FIG. 7, 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 locking rod 1 attached to the casing 11 so as to be able to advance and retreat from the hole 19.
The hanger 53, which is connected to the hook portion 18a (FIG. 4) formed in FIG. 8 by a known method, has a driven portion 54 that abuts the cam 44 of the rotor 23, and a penetrating through which the pin 56, the pin spring 57 and the plug 58 are mounted. A hole 55 is formed. FIG.
As shown in, the pin 56 abuts the flange portion 43 of the rotor 23 by the pin spring 57. The hanger 53 and the locking rod 18 are pressed toward the locking position by a hanger spring 60 disposed between the hanger 53 and the cap 59.

As shown in FIG. 11, a convex portion 15b is formed on the flange portion 15 of the key cylinder 16, and the convex portion 15b is formed.
Is in contact with a cam 12c of the housing case 12 shown in FIG. 9, and the cam 12c is a recess 1 formed at an unlocked position where the key cylinder 16 is rotated up to about 60 ° before the locked position.
2d. When the key cylinder 16 is rotated to the unlocked position, the key cylinder 16 is attached to the housing case 1
The convex portion 15b can be fitted into the concave portion 12d by pressing against 2.

The steering lock device 1 according to the present invention
When assembling 0, the necessary parts are arranged in the casing 11 in the assembled state, and then 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 70 is mounted in the recess 65 of the casing 11.

The keyway 2 of the key cylinder 16 of the steering lock device 10 at the lock position shown in FIGS. 1 and 2
When the key 28 is inserted into the key 6, the tip of the key 28 comes into contact with one end 34a of the key detecting lever 33 which projects into the key groove 26 of the lever body 34. Therefore, the key detection lever 33 shown in FIG. 1 is rotated clockwise as shown in FIG. 12, and the other end 34b of the lever body 34 presses the inner surface of the cover 13. 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. 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 because it is moved radially outward by the contact end portion 73 of the guide protrusion 12a.
Further, the flange portion 43 of the rotor 23 has the pin spring 5
The pin 56 is pressed against the elasticity of 7. Key cylinder 1
Even if the key is inserted into 6, the guard plate 40 is covered by the cover 1.
3 and the casing 11 do not move in the axial direction.

Next, when the key cylinder 16 is rotated together with the key from the locked position to the unlocked position, the cam 44 of the rotor 23 is rotated, so that the driven portion 54 of the hanger 53 is moved from the locked position to the unlocked position by the cam 44. Then, the locking rod 18 is disengaged from the steering shaft. When the key cylinder 16 is completely rotated to the unlock position, the hanger 53 moves sufficiently upward, the pin 56 moves above the flange portion 43 of the rotor 23, and the elastic force of the pin spring 57 increases, as shown in FIG. Is projected above the flange portion 43. Here, the ignition switch 80 can be turned on. When the key cylinder 16 is rotated from the lock position to the unlock position,
The stopper member 29 automatically rides over the locking projection 50 and is moved from the locked position shown in FIG. 23 to the unlocked position.

After that, when the key cylinder 16 is rotated together with the key from the unlock position to the lock position, when the key cylinder 16 is returned to the position of about 60 ° from the lock position, the vertical surface 48 of the protrusion 45 is engaged as shown in FIG. Vertical surface 5 of stop projection 50
The rotation of the key cylinder 16 to the locked position is prevented by abutting on the position 2. At this time, since the convex portion 15b formed on the flange portion 15 of the key cylinder 16 is aligned with the concave portion 12d of the cam 12c as shown in FIG. 18, when the key cylinder 16 is pressed inward together with the key, the convex portion 15b is concave. 12
d. Bent portion 17b of key cylinder 16
Moves in 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. 17 and 19
~ As shown in FIG. 21, the convex portion 15b of the key cylinder 16
Since it comes into contact with the cam 12c, the key cylinder 16 can be pressed only at the unlocked position of the stopper member 29 shown in FIG. After releasing the pressing of the key cylinder 16, the key cylinder 16 is returned to the initial position of FIGS. 1 and 2 by the elasticity of the cylinder spring 27.

When the key is removed from the key cylinder 16,
Due to the elasticity of the housing spring 20, the housing case 12, the key cylinder 16 and the rotor 23 are axially returned to the initial positions shown in FIGS. 1 and 2, and the key detection lever 33 is also returned to the position shown in FIG. One end of the lever 33 projects into the key groove 26. Further, since the movable piece 71 of the key detection switch 70 is disengaged from the housing case 12, the movable piece 71 projects again to switch from the on state to the off state as shown in FIG. When the key is pulled out from the key cylinder 16, the housing case 12 moves in the axial direction, and the engagement between the pin 56 and the flange portion 43 is released, so that the hanger 53 and the locking rod 1 are released.
8 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.

When the key 28 rotates together with the key cylinder 16, the key cylinder 16 rotates together with the key detection lever 33 and the guard plate 40, and the other end of the key detection 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.

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. Further, since the key cylinder 16 which 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. 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 inlet of the key cylinder 16 and does not interfere with the dashboard 75 (FIG. 1), so that it is necessary to use a swing member or a check lever, a dog, etc. as in the conventional case. Therefore, there is an advantage that the number of parts is reduced and the degree of freedom of layout around the steering lock device is increased.

The embodiment of the present invention is not limited to the above-mentioned embodiment and can be modified. 25 and 26 show a second embodiment of the present invention, and FIGS. 27 to 36 show a third embodiment of the present invention. 25 to 36, the same parts as those shown in FIGS. 1 to 24 are designated by the same reference numerals, and the description thereof will be omitted.

For example, as shown in FIGS. 25 and 26,
The key detection lever 33 is provided on the center plane of the key cylinder 16.
Is disposed on the same side as the housing spring 20, and the housing spring 20 and the key detection lever 33 can prevent the generation of an abnormal rotational force. Also,
The movable piece 71 of the key detection switch 70 may be engaged with the housing case 12 so as to move integrally with the housing case 12.

The steering lock device 10 shown in FIG.
Is a circular guard plate 40 shown in FIGS. 29 and 30.
It has. The 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 40a.
And a notch 40b formed between the two. When the key is not inserted into the steering lock device 10, the guide protrusion 12 a of the housing case 12 and the spring receiving portion 12
Each protrusion 38 (FIG. 28) of b is fitted in the notch 40b.

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. 27, the tip of the key 28 is located at the lever main body 34 of the key detection lever 33 as shown in FIG. Keyway 26
It abuts on one end 34a protruding inward. Therefore, the key detection lever 33 is rotated counterclockwise as shown in FIG. 34, and the other end 34b of the lever body 34 is attached to the guard plate 40.
Press the inner surface of. 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 (FIG. 28) of the spring receiving portion 12b move axially from the state of being fitted into the notch 40b of the guard plate 40, and the fitting is released. It in this way,
When the key is inserted into the key cylinder 16, the key rotates the key detection lever 33 to move the housing case 12 and the rotor 23 in the axial direction toward the inner position, whereby the housing case 12 and the guard plate 40.
Is disengaged. After that, the key is the key cylinder 1
When rotated together with 6, the rim 40a of the guard plate 40
Rotates circumferentially opposite to the protrusion 38 of the housing case 12. The guard plate 40 is the housing case 1
Since the projection 38 of the housing case 12 abuts the rim 40a when rotating relative to 2 (FIG. 34),
The housing case 12 is held in the inner position against the elasticity of the housing spring 20.

When the key 28 is inserted, it is moved inward as shown in FIG.
Since the key cylinder 16 shown in FIG. 5 can be further pressed to rotate to the lock position as shown in FIG. 36, the driver can operate the steering lock device 10 accurately without erroneous operation.

As shown in FIG. 27, 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. When the key 28 is not inserted into the steering lock device 10 and the locking rod 18 is in the locked position, the tip of the pin 56 is within the protruding range of the radially inner side surface 73 b of the stopper 73. As shown in FIG. 34,
When the key 28 is inserted into the steering lock device 10,
The flange portion 43 moves, and the tip of the pin 56 contacts the contact surface 43a of the flange portion 43. Locking rod 18
When the vehicle is in the locked position, the steering lock device 10
Even if a shock is applied to the pin 56, the pin 56 contacts the radially inner surface 73b of the stopper portion 73, so that the pin 56 does not contact the stopper portion 7.
3 cannot be exceeded, and the edge portion 43b of the flange portion 43
The locking of the pin 56 and the locking rod 18 to the unlocked position is prevented.

The embodiment of the present invention is not limited to the above-mentioned embodiment and can be modified. For example, as shown in FIG. 33, 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.

[0044]

As described above, according to the present invention, since the locking rod can be reliably moved to the locking position after the key is pulled out from the key cylinder, the operability can be improved. 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, it is possible to improve driving safety. Further, 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, so that the surroundings of the steering lock device can be prevented. There is an advantage that the degree of freedom of layout is increased.
It is not necessary to use a swinging member, a check lever, a dog or the like as in the conventional case, and the number of parts can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a sectional view along the axial direction, which is different from FIG.

FIG. 3 is a front view of the steering lock device according to the present invention.

FIG. 4 is an exploded perspective view of a steering lock device according to the present invention.

FIG. 5 is a front view of the steering lock device with a cover removed.

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

FIG. 7: Side view of rotor

FIG. 8 is a front view of the rotor

FIG. 9 is a sectional view including a key detection switch.

FIG. 10 is a side view of the key cylinder.

FIG. 11 is a side view of the head of the key cylinder.

FIG. 12 is a sectional view including a locking rod.

FIG. 13 is a cross-sectional view showing a state where the key is inserted into the key cylinder at the lock position.

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

FIG. 15 is a cross-sectional view showing a state where the key cylinder is pressed during rotation to the lock position.

FIG. 16 is a cross-sectional view showing a state in which the hanger engages with the edge portion of the rotor.

FIG. 17 is a development view showing a state where the convex portion of the key cylinder abuts the cam surface of the housing case in the locked position.

FIG. 18 is a development view of the cam of the housing case with the key cylinder rotated by 60 °.

FIG. 19 is a development view of the cam of the housing case with the key cylinder rotated by 90 °.

FIG. 20 is a development view of the cam of the housing case with the key cylinder rotated by 120 °.

FIG. 21 is a development view of the cam of the housing case with the key cylinder rotated by 152 °.

FIG. 22 is a sectional view showing a stopper member.

FIG. 23 is a cross-sectional view showing a state where the stopper member gets over the protrusion of the housing case.

FIG. 24 is a cross-sectional view showing a state where the stopper member comes into contact with the protrusion of the housing case.

FIG. 25 is a sectional view showing a second embodiment of the steering lock device according to the present invention.

FIG. 26 is a sectional view showing a state in which a key is inserted in the steering lock device of FIG. 24.

FIG. 27 is a sectional view of a steering lock device showing a third embodiment of the present invention.

28 is an exploded perspective view of the steering lock device shown in FIG. 27. FIG.

FIG. 29 is a perspective view of a guard plate.

FIG. 30: Rear view of guard plate

FIG. 31 is a cross-sectional view showing a fitted state of the guard plate and the housing case.

FIG. 32 is a sectional view showing a state where the guard plate and the housing case are disengaged from each other.

FIG. 33 is a perspective view showing still another embodiment of the guard plate.

FIG. 34 is a sectional view showing a state where a key is inserted.

FIG. 35 is a cross-sectional view showing a state in which a hanger pin is locked to a rotor flange portion.

FIG. 36 is a sectional view showing a state where the key cylinder is pressed together with the key.

[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, 70. . Key detection switch,

Claims (5)

[Claims] 1. A casing, a key cylinder rotatably and axially movable in the casing by a key, a locking rod removably movable to a steering shaft, and integrally rotatable with the key cylinder. To the locking rod, a hanger connected to the locking rod and moved to the unlocked position by the cam of the rotor when the rotor rotates, a hanger spring for pressing the hanger toward the locked position, and an elastic from the hanger. Pin protruding with a key, a cover fixed to the casing at the front of the key cylinder, and a pivotally mounted front part of the key cylinder that is pivoted when the key is inserted into the key cylinder to apply a reaction force to the cover. In addition, a stearin equipped with a key detection lever that moves the key cylinder in the direction of separating from the cover. In the glock device, a hollow portion, which is movably arranged in an axial direction between an outer position and an inner position in a casing, and accommodates the key cylinder rotatably and axially movably, and a tumbler of the key cylinder are projected. The housing has a housing case with a tumbler groove and a housing spring that presses the housing case toward the cover.When the key is inserted into the key cylinder, the key detection lever rotates and resists the elasticity of the housing spring. The housing case, key cylinder and rotor moved axially inward and the pin was pressed by the rotor to rotate the key from the locked position to the unlocked position and move the hanger and locking rod from the locked position to the unlocked position. Then the pin can be engaged with the edge of the rotor and the key is locked from the unlocked position to the locked position. When the key is moved to, the pin engages with the edge of the rotor, the hanger and the locking rod are held in the unlocked position, and when the key is pulled out from the key cylinder, the elasticity of the housing spring rotates the key detection lever and The housing case, the key cylinder, and the rotor move axially outwardly, the engagement between the rotor and the pin is released, and the hanger and the locking rod are moved from the unlocked position to the locked position by the elastic force of the hanger spring. Steering lock device. 2. A rotor integrally rotatably connected to the key cylinder is arranged in the casing so as to be axially movable with a gap in the key cylinder and presses the key cylinder toward the cover. A cylinder spring is installed between the key cylinder and the rotor, and when the key cylinder is rotated from the unlocked position to the locked position, it is locked in the housing case and a stopper member that prevents the key cylinder from rotating is attached to the key cylinder. Is provided,
The steering lock device according to claim 1, wherein when the key cylinder is pressed inward in the axial direction, the engagement between the stopper member and the housing case is released to rotate the key cylinder to the lock position. 3. A convex portion is formed on one of the key cylinder and the housing case, and a concave portion is formed on the other, so that the convex portion and the concave portion are aligned during the rotation of the key cylinder from the unlock position to the lock position. The steering lock device according to claim 2, wherein the key cylinder can be pressed inward in the axial direction and the convex portion can be fitted into the concave portion. 4. The steering lock device according to claim 1, wherein a key detection switch operated by a housing case that moves axially inward when the key is inserted into the key cylinder is attached to the casing. 5. A guard plate rotatably arranged between the cover and the housing case, a convex portion formed on one of the key cylinder and the housing case, and a convex portion formed on the other of the key cylinder and the housing case. The housing case is provided with a cam having a recess into which the 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. It is non-rotatably supported in the casing, the guard plate has a notch with which the protrusion of the housing case fits, and when the key is inserted into the key cylinder, the key rotates the key detection lever, and the housing case and Move the rotor axially towards the inner position, which causes the housing case and guard plate Is disengaged, the guard plate can rotate relative to the housing case and holds the housing case in the inner position against the elastic force of the housing spring, and after moving the housing case to the inner position. , The key cylinder can be rotated from the locked position to the unlocked position, and when the key cylinder is rotated together with the key from the unlocked position to the locked position, the key cylinder is pressed axially with the key in the unlocked position. The steering lock device according to claim 1, wherein the key cylinder can be rotated to the lock position after the engagement between the locking protrusion and the stopper member is released by fitting the convex portion into the concave portion.