JP4652203B2 - Steering lock device - Google Patents

Description

  The present invention relates to a steering lock device used in a vehicle such as an automobile.

  The steering lock device is provided with a safety mechanism for the steering lock device that prevents the key from being pulled out of the key cylinder during traveling of the vehicle due to an erroneous operation and the steering is locked.

  Such a safety mechanism can start the engine without any trouble when the key cylinder is rotated from the lock position to the ACC position, the on position, and the start position as in Patent Document 1, for example. However, when the key cylinder is rotated back from the ON position to the locked position, the rotation is prevented at the middle ACC position, and the key cannot be pulled out from the key cylinder.

  Therefore, in order to rotate the key cylinder back to the lock position and pull out the key, another operation different from the rotation operation for releasing the blocking to push the key and move the key cylinder backward is performed at the ACC position. Many have a so-called two-motion mechanism that rotates the key cylinder.

Japanese Utility Model Publication No. 63-192166

  However, in the steering lock device as in Patent Document 1, since the stopper member and the spring constituting the two-motion mechanism are arranged on the outer periphery of the key cylinder, a storage space for accommodating the stopper member and the spring is formed in the cylinder outer. Must.

  For this reason, since it is necessary to provide a storage space for accommodating the stopper member and the spring in a portion located on the outer periphery of the key cylinder, the cylinder lock is increased in the radial direction, and the steering lock device is enlarged.

  In addition, depending on the specifications, there are cases where both a type with a 2-motion mechanism and a type without a 2-motion mechanism are set in one vehicle. In a conventional configuration, a steering lock device with a 2-motion mechanism set has a 2-motion mechanism. Compared to a steering lock device that is not set, the number of parts increases, resulting in an increase in cost. If the body of the steering lock device is used in common, the steering lock device is enlarged even if the 2-motion mechanism is not set. There was a problem that.

  The present invention has been made in view of such circumstances, and does not include special parts that are required only for the two-motion mechanism of the steering lock device. An object of the present invention is to provide a steering lock device capable of constituting a motion mechanism.

In order to achieve the above object, the present invention provides a cylinder lock having a key cylinder that can be rotated from a lock position to an unlock position by inserting a key, and rotation of the key cylinder from the lock position toward the unlock position. And a lock shaft that moves from a protruding position that engages with the steering shaft to prevent rotation of the steering shaft to a retracted position that disengages the steering shaft, and an outer periphery of the key cylinder. One end portion is in sliding contact, and the end portion is pushed up at the time of key insertion to swing according to the insertion / removal of the key, and the other end portion is a lock link that holds the lock shaft in an unlocked state. A steering lock device, wherein the key link is engaged with the key cylinder at a predetermined rotational position. A protrusion for preventing return rotation from the unlocked position to the locked position provided in the side surface of the key cylinder is provided with a locking portion which engages with the protrusion of the lock link upon insertion of the key, the protrusion The lock cylinder is formed closer to the lock shaft than the rotation fulcrum of the lock link, and the key cylinder can be pushed by a pressing operation of the key at a predetermined rotation position. The engagement with the projection is released, and the key cylinder can be turned back to the locked position .

The locking portion has an inclined surface formed on one surface side and a vertical surface formed on the other surface side. When the key cylinder is rotated from the lock position to the unlock position, the protrusion portion of the lock link is formed. When the key cylinder is in contact with the inclined surface, the rotation operation of the key cylinder is not prevented. When the key cylinder returns from the unlock position to the lock position, the protrusion of the lock link It is good also as a structure by which rotation operation of the said key cylinder is prevented by contact | abutting with a perpendicular surface.

With this configuration, it is not necessary to separately provide components necessary only for the two-motion mechanism, so that manufacturing and component management costs can be reduced.

In addition , a two-motion mechanism can be configured with a key cylinder and a lock link. Further, by changing the lock link, it is possible to cope with both the type having the two-motion mechanism and the type without the steering lock device without changing the number of parts.

Furthermore , the key can be pulled out by rotating the key cylinder from the unlocked position to the locked position by the same operation method as that of a conventional steering lock device having a two-motion mechanism.

  As is clear from the above description, according to the steering lock device of the present invention, the two-motion mechanism can be constituted by the lock link and the key cylinder, which are essential components for the steering lock device. It is not necessary to separately provide necessary members, and manufacturing and component management costs can be reduced.

  Furthermore, it is only necessary to form a storage space for accommodating the lock link in the cylinder outer, and even if a two-motion mechanism is provided, it is not necessary to enlarge the cylinder lock in the radial direction. Can do.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 is a side sectional view of the steering lock device of the present invention, FIG. 2 is a side sectional view showing a state in which a key is inserted into a key cylinder of the steering lock device of the present invention, and FIG. 3 is a front view of the steering lock device of the present invention. 4 is a state diagram showing the relationship between the locking portion of the key cylinder and the protrusion of the lock link in the steering lock device shown in FIG. 1, and FIG. 5 is a rear view of the camshaft in the steering lock device of the present invention. FIG. 6B is a partial sectional view, FIG. 6C is a front view, FIG. 6 is a sectional view taken along line 6A-6A in FIG. 2, and FIG. 7 is a sectional view taken along line 7A-7A in FIG.

8A is a side view of the lock link in the steering lock device of the present invention, FIG. 8B is a front view thereof, and FIG. 9 is a diagram illustrating the rotation of the key cylinder of the steering lock device of the present invention from the lock position to the ACC position. FIG. 10 is a side sectional view showing a state when the key cylinder of the steering lock device of the present invention is in the ACC position, and FIG. 11 is a diagram showing the relationship of the key cylinder in the steering lock device shown in FIG. FIG. 12 is a state diagram showing the relationship between the locking portion and the locking link projection, FIG. 12 is a state diagram showing the relationship between the locking portion of the key cylinder and the locking link projection in the steering lock device shown in FIG. It is side surface sectional drawing which shows the state which pushed in the key cylinder when the key cylinder of the steering lock apparatus of this is in the ACC position.
In FIG. 1 (the same applies to FIGS. 2, 9, 10, and 13), the right side is referred to as “front” and the left side is referred to as “rear”.

  The steering lock device 1 includes a body 2 that is integrally formed of a metal material such as zinc or magnesium. A substantially cylindrical cylinder outer 3 is accommodated integrally at the front end of the body 2. A cylindrical key cylinder 4 is housed in the cylinder outer 3 so as to be able to be pushed in and rotatable. The key cylinder 4 and the cylinder outer 3 constitute a cylinder lock 5. A lock seal 5 a for preventing destruction of the key cylinder is disposed between the front surface where the key hole 4 a of the key cylinder 4 is formed and the inner peripheral surface of the cylinder outer 3.

  A plurality (eight in this embodiment) of plate-like tumblers 6 are arranged in the key cylinder 4 in an aligned state. As shown in FIG. 1, in the normal state in which the key 7 is not inserted, these tumblers 6 have the ends of the tumblers 6 protruding from the outer peripheral surface of the key cylinder 4 by the biasing force of a coil spring (not shown). The end portion of the tumbler 6 is engaged with a lock groove 3 a formed on the inner surface of the cylinder outer 3, and the key cylinder 4 is prevented from rotating in the cylinder outer 3.

  On the other hand, when the regular key 7 is inserted from the key hole 4a on the front end surface of the key cylinder 4, each tumbler 6 is against the urging force of the coil spring (not shown) as shown in FIG. And the end of the key cylinder 4 is retracted from the outer peripheral surface of the key cylinder 4 to be disengaged from the lock groove 3a, whereby the key cylinder 4 is allowed to rotate within the cylinder outer 3. In this state, the key cylinder 4 can be rotated from the lock position shown in FIG. 3 to the ACC position, the ON position, and the start position.

  A rotating member 8 is supported in a square hole portion 4b communicating with a key hole 4a formed near the front end of the key cylinder 4 so as to be rotatable about a shaft 8a. In a state where the key 7 is not inserted into the key cylinder 4, as shown in FIGS. Therefore, the rotating member 8 is also held in a rotated state so as to be pushed into the square hole portion 4b.

  When the key 7 is inserted into the key cylinder 4, as shown in FIG. 2, the side surface of the key 7 comes into contact with the upper surface (upper side in FIG. 2) of the rotating member 8, It is rotated downward about the shaft 8a (downward in FIG. 2), and the tip of the lock link 10 is pushed out to the surface position of the outer peripheral surface of the key cylinder 4 against the biasing force of the biasing spring 9. It is configured as follows. A key groove 8b slightly wider than the width of the key 7 is formed at the center of the upper surface (upper side in FIG. 2) of the rotating member 8, and the key 7 can be smoothly inserted into the key insertion hole 6a of the tumbler 6. It has come to be guided.

  The rear end portion of the key cylinder 4 is provided with a flange portion 4c formed in a hook shape that abuts the rear end surface of the cylinder outer 3 and prevents the key cylinder 4 from moving forward. A cylindrical projecting portion 4d is provided on the rear end surface so as to protrude rearward.

Similarly, a substantially cylindrical guide portion 4e is provided on the outer periphery of the protruding portion 4d so as to protrude rearward from the rear end surface of the flange portion 4c. A locking portion 11 that protrudes so as to be engageable with the protruding portion 10 a of the lock link 10 is provided. As shown in FIG. 4, the locking portion 11 is formed on the inclined surface 11a on one side of the key cylinder 4 in the rotation direction from the lock position to the ACC position, and the other surface in the return rotation direction from the ACC position to the lock position. The side is formed on the vertical surface 11b. Note that a gap is formed between the protruding portion 4d and the guide portion 4e so that a cylindrical body portion 12b of the camshaft 12 described later can be fitted therein.

  A substantially cylindrical cam shaft 12 is connected to the projecting portion 4 d of the key cylinder 4 so as to rotate integrally with the key cylinder 4. Specifically, as shown in FIGS. 1 and 5, a concave portion 12 a to which the protruding portion 4 d of the key cylinder 4 can be connected is formed in the cylindrical portion 12 b provided at one end portion of the camshaft 12. ing. The concave portion 12a and the projecting portion 4d of the key cylinder 4 are connected in the rotational direction and can be engaged with each other as shown in FIG. 4 and FIG. It is formed in a shape. An operating spring 13 is accommodated between the concave portion 12a of the camshaft 12 and the protruding portion 4d of the key cylinder 4, and the key cylinder 4 is pushed in at a predetermined rotational position by the operating spring 13. It is accommodated in the cylinder outer 3 while being urged forward.

  Further, the camshaft 12 is provided with a semicircular cam 15 that engages in a radial direction with a lock shaft 14 that engages with a recess of a steering shaft (not shown) to prevent the steering shaft from rotating. Specifically, as shown in FIG. 5A, a flat portion 15a that contacts the lock shaft 14 when the key cylinder 4 is in the locked position, and an arc that contacts the lock shaft 14 when the key cylinder 4 is not in the locked position. The cam 15 is comprised by the part 15b.

  As shown in FIG. 1, the rear end portion of the camshaft 12 is connected to a rotary switch 16 that starts or stops the engine according to the rotation of the key cylinder 4 housed in the case portion 2 a of the body 2. ing.

  As shown in FIGS. 6 and 7, the lock shaft 14 described above has an operating portion 14 b and is slidable in the vertical direction (left and right in FIGS. 6 and 7) in conjunction with the cam 10. Is housed inside. The lock shaft 14 is urged by the drive spring 18 in the protruding direction (left direction in FIGS. 6 and 7).

  That is, when the key cylinder 4 is in the locked position, as shown in FIG. 6, the lock shaft 14 is brought into contact with the flat portion 15 a of the cam 15 by the biasing force of the drive spring 18. The tip protrudes from the body 2.

  Therefore, the tip of the lock shaft 14 is engaged with a recess of the steering shaft (not shown), and the steering is locked.

  On the other hand, as shown in FIG. 7, when the regular key 7 is inserted into the key cylinder 4 and the key cylinder 4 is rotated from the lock position to the ACC position, the arc portion 15 b of the cam 15 becomes the operating portion of the lock shaft 14. In order to contact 14b, the lock shaft 14 moves in the immersion direction (rightward in FIGS. 6 and 7) against the urging force of the drive spring 18 and is drawn into the body 2.

Accordingly, since the tip of the lock shaft 14 is disengaged from a recess of the steering shaft (not shown), the locked state of the steering is released.
Note that the ACC position, the on position, and the start position other than the lock position are unlock positions where the tip of the lock shaft 14 is disengaged from a recess of the steering shaft (not shown).

  A lock link storage portion 17 is formed in the cylinder outer 3 along the axial direction. On the inner surface of the lock link storage portion 17, a support shaft groove 17a extending in the radial direction and a front side of the support shaft groove 17a are provided. Similarly, a spring accommodating groove 17b extending in the radial direction is formed on the side. A communication hole 3c that communicates with the cylinder housing portion 3b in which the key cylinder 4 is housed is formed in the bottom surface portion on the distal end side (right side in FIG. 1) of the lock link housing portion 17.

  The lock link storage portion 17 stores the lock link 10 that detects the insertion of the key 7 into the key cylinder 4 and prevents the lock shaft 14 from protruding.

  As shown in FIG. 8, on the side surface of the lock link 10 located on the key cylinder side, a key sensing end projecting so as to come into contact with the rotating member 8 of the key cylinder 4 at the tip (right side in FIG. 8) 10b is provided, and a locking end 10c protruding so as to be engageable with the lock groove 14a of the lock shaft 14 is provided at the rear end (left side in FIG. 8). A projection 10 a is provided at the center so as to protrude to engage with a locking portion 11 formed on the guide portion 4 e of the key cylinder 4.

  On the side surface of the lock link 10 opposite to the side surface on which the key sensing end 10b is provided, a spring receiving portion 10d that is urged by the urging spring 9 that is accommodated in the spring accommodating groove 17b is provided. . Further, on the surface of the lock link 10, there is provided a support shaft portion 10e that engages with a support shaft groove 17a of the lock link storage portion 17 so as to be movable in a radial direction and swingable. In this embodiment, the support shaft portion 10e is provided only on one side, but may be provided on both sides.

  The protrusion 10a described above is provided on the rear side of the support shaft 10e. The key 7 is inserted into the key cylinder 4, and the key sensing end 10b is moved downward (downward in FIG. 1) by the rotating member 8. When pushed, the lock link 10 is rotated clockwise in FIG. 1 against the urging force of the urging spring 9 around the support shaft portion 10e, and the protrusion 10a moves to the key cylinder 4 side. It is configured.

  After the lock link 10 is housed in the lock link housing portion 17, the key sensing end 10 b is attached in the direction in which the key sensing end 10 b comes into contact with the rotating member 8 of the key cylinder 4 by the biasing spring 9 housed in the spring housing groove 17 b. It is held in the lock link storage part 17 in a biased state. Reference numeral 19 denotes a fixing plate 19 that closes the spring accommodating groove 17b and applies a biasing force to the biasing spring.

Next, the operation of the steering lock device 1 having the above configuration will be described.
As shown in FIG. 2, when the user inserts the regular key 7 into the key cylinder 4, the rotating member 8 is rotated about the shaft portion 8 a by the side surface of the key 7, and the key sensing end 10 b of the lock link 10 is pushed down. . Therefore, the lock link 10 rotates clockwise around the support shaft portion 10 e against the biasing force of the biasing spring 9, and the locking end 10 c of the lock link 10 is in contact with the side surface of the lock shaft 14. Retained.

  At this time, as shown in FIG. 6, the lock shaft 14 is in the locked position where the tip protrudes from the body 2, so that the locking end 10 c of the lock link 10 can be engaged with the lock groove 14 a of the lock shaft 14. Without being in contact with the side surface of the lock shaft 14, the support shaft portion 10e is held in a state of moving slightly downward (downward in FIG. 2) in the support shaft groove 17a.

  Then, when the key cylinder 4 is rotated from the lock position to the ACC position, as shown in FIGS. 9 and 11, the inclined surface 11 a of the locking portion 11 formed on the guide portion 4 e of the key cylinder 4 becomes the lock link 10. Therefore, the lock link 10 is moved further downward (downward in FIG. 9) against the urging force of the urging spring 9.

  That is, when the key cylinder 4 is rotated from the lock position to the ACC position, the inclined surface 11a of the locking portion 11 of the key cylinder 4 pushes down the protrusion 10a of the lock link 10 as shown in FIG. Since the key cylinder 4 is moved in the downward direction in FIG. 11, the key cylinder 4 can be rotated without being blocked by the protrusion 10 a of the lock link 10.

  At this time, since the camshaft 12 also rotates integrally with the key cylinder 4, the arc portion 15b of the cam 15 comes into contact with the operating portion 14b of the lock shaft 14, and the tip of the lock shaft 14 begins to be drawn into the body 2. .

  When the protruding portion 10a of the lock link 10 gets over the locking portion 11, the lock link 10 rotates about the support shaft portion 10e by the urging force of the urging spring 9 and returns to the position shown in FIG. 10 and 12 show a state in which the key cylinder 4 is in the ACC position, and the locking portion 11 of the key cylinder 4 is in a position beyond the protruding portion 10 a of the lock link 10. At this time, the lock shaft 14 is completely drawn into the body 2 in conjunction with the rotation of the cam 15 of the cam shaft 12 as shown in FIG. 7, so that the locked state of the steering is released.

  Therefore, as long as the key 7 is not pulled out from the key cylinder 4 by moving the lock groove 14 a formed on the side surface of the lock shaft 2 to a position where the lock groove 14 a can be engaged with the locking end 10 c of the lock link 10, the lock link 10. The locking end 10c is held in a state of being engaged with the lock groove 14a.

  Thereafter, the key cylinder 4 is not restricted from the ACC position to the on position and the start position, and can be rotated, and the rotary switch 16 is turned on to start the engine and drive the vehicle. Can do.

  Next, when the key cylinder 4 is rotated back from the ON position to the lock position, the vertical surface 11b of the locking portion 11 is brought into contact with the protrusion 10a of the lock link 10 at the middle ACC position as shown in FIG. Because of the contact, the key cylinder 4 is prevented from rotating from the ACC position to the lock position.

  When the key cylinder 4 is rotated from the ACC position to the lock position, as shown in FIG. 13, the key 7 is pushed at the ACC position, and the key cylinder 4 is moved backward (left side in FIG. 13). The locking portion 11 may be moved to a position where it does not come into contact with the protruding portion 10a, and the key cylinder 4 may be rotated in the lock position direction while the key 7 is pushed.

  Therefore, in order to return and rotate the key cylinder 4 from the on position to the locked position, in addition to the rotation operation of the key 7 in the return direction, another operation of pressing the key 7 is required as in the conventional case. When the key cylinder 4 is turned back from the on position to the lock position and rotated by an erroneous operation during traveling, the key 7 is removed, thereby preventing the lock shaft 14 from protruding and the steering from being locked. it can.

  In this embodiment, the key cylinder 4 is prevented from rotating at the ACC position, and the key cylinder 4 can be pushed. However, the key cylinder 4 can be rotated at a predetermined rotation position (for example, the ON position) of other key cylinders. The movement may be prevented and the key cylinder 4 may be pushed in.

  As described above, in the present invention, the two-motion mechanism can be configured by the configuration essential to the steering lock device 1 including the key cylinder 4, the lock link 10, and the biasing spring 9. Therefore, since there is no need to provide special parts required only for the 2-motion mechanism, a 2-motion mechanism that reduces the number of parts without changing the basic configuration of the steering lock device 1 compared to the conventional product is configured. Can do.

  Moreover, the cylinder outer 3 can be reduced in size in the radial direction by eliminating the lock plate constituting the two-motion mechanism provided in the conventional steering lock device. Therefore, the steering lock device 1 can be downsized.

  Furthermore, the type without the two-motion mechanism can be set by simply changing the lock link 10 to one without the protrusion 10a and without changing the other configuration.

  In addition, the user can feel uncomfortable because the key cylinder 4 can be rotated back from the ACC position to the lock position and the key 7 can be pulled out by the same operation method as the steering lock device having the conventional two-motion mechanism. The conventional steering lock device can be switched to the configuration of the steering lock device of the present invention without holding the steering wheel.

  By configuring as described above, in the present invention, it is not necessary to separately provide a special part required only for the two-motion mechanism. Therefore, the steering lock device having the two-motion mechanism is a type of steering without the two-motion mechanism. It can be configured with the same number of parts as the locking device. Therefore, the steering lock device can be reduced in size, and the manufacturing and component management costs can be reduced.

It is side surface sectional drawing of the steering lock apparatus of this invention. It is side surface sectional drawing which shows the state which inserted the key in the key cylinder of the steering lock apparatus of this invention. It is a front view of the steering lock device of the present invention. It is a state figure which shows the relationship between the latching | locking part of the key cylinder in the steering lock apparatus shown in FIG. 1, and the projection part of a lock link. (A) of a cam shaft in the steering lock device of the present invention is a rear view, (b) is a partial sectional view, and (c) is a front view. FIG. 6 is a sectional view taken along line 6A-6A in FIG. It is the 7A-7A sectional view taken on the line of FIG. (A) of a lock link in the steering lock device of the present invention is a side view, and (b) is a front view. It is side surface sectional drawing which shows the state in the middle of rotating the key cylinder of the steering lock apparatus of this invention from a lock position to an ACC position. It is side surface sectional drawing which shows a state when the key cylinder of the steering lock apparatus of this invention exists in an ACC position. FIG. 10 is a state diagram showing the relationship between the locking portion of the key cylinder and the protrusion portion of the lock link in the steering lock device shown in FIG. 9. It is a state figure which shows the relationship between the latching | locking part of a key cylinder and the projection part of a lock link in the steering lock apparatus shown in FIG. It is side surface sectional drawing which shows the state which pushed the key cylinder when the key cylinder of the steering lock apparatus of this invention exists in the ACC position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steering lock apparatus 3 Cylinder outer 4 Key cylinder 5 Cylinder lock 7 Key 8 Rotating member 9 Energizing spring 10 Lock link 10a Protrusion part 10b Key detection end 10c Locking end 11 Locking part 14 Lock shaft 14a Locking groove

Claims (2)

A cylinder lock having a key cylinder rotatable from a locked position to an unlocked position by inserting a key;
In accordance with the rotation of the key cylinder from the lock position to the unlock position, the engagement with the steering shaft is released from the protruding position that engages with the steering shaft and prevents the rotation of the steering shaft. One end is in sliding contact with the outer periphery of the lock shaft that moves to the retracted position and the key cylinder, and the other end is swung in response to the insertion and removal of the key by being pushed up when the key is inserted. In a steering lock device comprising a lock link that holds the lock shaft in an unlocked state at a portion,
The lock link is engaged with the key cylinder at a predetermined rotation position, and a protrusion for preventing the key cylinder from returning from the unlock position to the lock position is provided.
Provided on the side surface of the key cylinder is a locking portion that engages with the protrusion of the lock link when the key is inserted, and the protrusion is formed closer to the lock shaft than the rotation fulcrum of the lock link;
The key cylinder can be pushed by a pressing operation of the key at a predetermined rotation position, and by engaging the key cylinder, the engagement between the locking portion and the protrusion is released, and the key cylinder is locked. Steering lock device characterized in that it can be turned back and forth. The locking portion has an inclined surface formed on one surface side and a vertical surface formed on the other surface side. When the key cylinder is rotated from the lock position to the unlock position, the protrusion portion of the lock link is The rotation operation of the key cylinder is not prevented by getting in contact with the inclined surface, and when the key cylinder is rotated back from the unlock position to the lock position, the protrusion of the lock link is moved to the vertical surface. The steering lock device according to claim 1, wherein the key cylinder is prevented from rotating by abutting with the steering lock device.

Images