JP4838183B2 - Steering lock device - Google Patents

Description

  The present invention relates to a steering lock device mounted on an automobile or the like and provided with so-called deadlock means.

  A conventional steering lock device of this type is disclosed in Patent Document 1. As shown in FIG. 9, the electric steering lock device includes a frame 100 and a device main body 101 assembled to the frame 100.

  In the apparatus main body 101, a key cylinder (not shown) that can be operated by inserting an appropriate key, a rotating rod 102 that is integrally connected to the key cylinder, and a cam plate that is integrally fixed to the rotating rod 102 103, a lock rod 104 having a cam pin 104a following the cam plate 103, and the like are accommodated.

  The lock rod 104 is movably accommodated in the rod guide hole 101a of the frame 100, and moves between a lock position (the position in FIG. 9) for locking the steering shaft 110 and an unlock position for allowing the steering shaft 110 to rotate. .

  The deadlock means 120 includes a lock pin 121 housed in the frame 100, a spring 122 that urges the lock pin 121 in the protruding direction, and a trigger member 123 that restricts the movement of the lock pin 121 in the protruding direction. I have. The tip of the trigger member 123 is in contact with the tapered surface 121 a of the lock pin 121. The rear end of the trigger member 123 is in contact with the cam plate 103. In FIG. 9, the rear end of the trigger member 123 is not in contact with the cam plate 103 in order to show the state after the illegal attack.

  In the above configuration, when a person carrying the appropriate key moves a key cylinder (not shown) from the OFF position to the ON position so as to drive the vehicle, the lock rod 104 moves from the steering lock position of FIG. 9 to the steering unlock position. . Thereafter, when the ignition key is rotated to the engine start position, the engine is started.

  When the key cylinder (not shown) is returned from the engine start position to the off position, the engine is stopped and the lock rod 104 is moved from the steering unlock position to the steering lock position in FIG.

In this tearing lock state, a person who attempts to illegally unlock the steering lock device attacks from the outside, destroys the device main body 101 and tries to pull out the rotating rod 102 as shown in FIG. Then, the cam plate 103 is disengaged from the rear end of the trigger member 123, and the lock pin 121 moves to the lock position side while pushing the trigger member 123 away by the spring force of the spring 122, and finally locks in the lock hole 104b. Move to position. As a result, the lock rod 104 cannot be moved from the steering lock position to the steering unlock position after the rotating rod 102 has been removed by a person who intends to unlock the lock, and the anti-theft performance is excellent. .
Japanese Patent Laid-Open No. 7-32773

  However, in the conventional steering lock device, it is possible to remove the spring 122 by inserting a wire or the like from the trigger hole 100 a of the frame 100. When the spring 122 is removed, the lock pin 121 can be easily moved from the lock position, and the possibility of unauthorized unlocking is increased. Therefore, it is necessary to prevent an illegal attack on the deadlock unit 120.

  Therefore, an object of the present invention is to provide a steering lock device that can reliably cope with an illegal attack of a deadlock means.

  The invention according to claim 1 that achieves the above object includes a lock rod that is inserted into a rod guide hole formed in a frame and is movably disposed between a steering lock position and a steering unlock position, and the lock rod includes: A deadlock means for locking at a steering lock position, and the deadlock means is disposed on the lock rod and on a lock position side that is disposed on the frame side and engages with the lock section. The lock pin urged by the urging means, and a trigger member that prevents the lock pin from moving to the lock position and holds the lock pin in the standby position. The steering lock device is configured such that the member releases the restriction of movement of the lock pin and the lock pin moves to the lock position. A is, in the dead locking means, characterized in that the pin locking means for locking the locking pin which is displaced to the locked position to the locked position is provided.

  A second aspect of the present invention is the steering lock device according to the first aspect, wherein the pin lock means is an elastic locking claw provided on the frame side, and the elastic locking claw includes the lock pin. When moving from the standby position to the lock position, the lock pin is bent and deformed outside the movement area of the lock pin to allow the lock pin to move, and when the lock pin moves to the lock position, it is bent and deformed. The lock pin is prevented from moving to the standby position side.

  A third aspect of the present invention is the steering lock device according to the first aspect, wherein the pin lock means is an elastic locking claw provided on the lock pin, and the elastic locking claw is a standby of the lock pin. When moving from the position to the lock position, the lock pin is allowed to move by being deformed in the diameter reducing direction, and when the lock pin is moved to the lock position, it is bent in the diameter increasing direction to be deformed to return to the standby position side of the lock pin. It is characterized by preventing movement to.

  The invention of claim 4 is the steering lock device according to claim 2 or claim 3, wherein the elastic locking pawl is visible through the trigger hole of the frame when the lock pin is in the lock position. It is characterized by being arranged at a position not present.

  According to the first aspect of the present invention, the lock pin cannot be moved from the lock position by the pin lock means even if the biasing means is removed using the trigger hole in the state where the deadlock means is activated. Therefore, it is possible to reliably cope with an illegal attack of the deadlock means, and to further improve the anti-theft property.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the pin lock means can be produced by a design change on the frame side.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1, the pin lock means can be produced by a design change on the lock pin side.

  According to the invention of claim 4, in addition to the effect of the invention of claim 2 or claim 3, it is also possible to make an unauthorized attack to the elastic locking claw difficult and to further improve the anti-theft property.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 7 show an embodiment of the present invention, FIG. 1 is a plan view of an electric steering lock device, FIG. 2 is a plan view of a frame, and FIG. 3 is a view of FIG. 4 is a cross-sectional view taken along the line AA, FIG. 4 is a view of the pin case and the lock pin viewed from the direction of arrow B in FIG. 3, and FIG. 5 is a cross-sectional view taken along the line A-A in FIG. 6 is a view of the pin case and the lock pin as viewed from the direction of the arrow C in FIG. 5. FIG. 7 is a view of FIG. 1A with the lock pin positioned at the locking position and the urging spring removed. It is A sectional view.

  As shown in FIGS. 1 to 3, the electric steering lock device 1 that is a steering lock device includes a frame 2 and a cover 3 that covers the upper surface of the frame 2. The frame 2 and the cover 3 are assembled by, for example, a fitting claw and a fitting hole.

  A trigger member 25 described below is integrally provided on the inner surface of the cover 3.

  A drive mechanism (not shown) is disposed on the upper surface of the frame 2 covered with the cover 3. The drive mechanism unit includes, for example, an ignition key cylinder (not shown) that can be rotated by a person carrying the electronic key, and a motor unit (not shown) that is driven and controlled by the rotation operation of the ignition key cylinder. A worm gear (not shown) fixed to the output shaft of the motor unit, a worm wheel (not shown) meshing with the worm gear, and a cam portion (not shown) integrally attached to the side surface of the worm wheel Etc.

  A rod guide hole 6 is formed in the frame 2. One end side of the rod guide hole 6 opens to the upper surface of the frame 2 covered with the cover 3, and the other end side opens to the bottom surface side of the frame 2. The frame 2 has a trigger hole 7 into which the trigger member 25 enters. One end side of the trigger hole 7 is opened on the upper surface of the frame 2 covered with the cover 3, and the other end side is opened on the bottom surface side of the frame 2.

  The lock rod 10 is movably disposed in the rod guide hole 6. A hanger portion 11 that protrudes in the horizontal direction is integrally provided at the upper end of the lock rod 10. The hanger portion 11 is configured to follow and move to a cam portion (not shown) of the drive mechanism portion, and a steering lock position (position in FIG. 3) that locks a steering shaft (not shown) by the following movement and the steering. It moves between steering unlock positions that allow rotation of a shaft (not shown).

  The deadlock means 20 includes a locking hole 21 which is a locking portion provided in the lock rod 10, a pin case 22 fixed to the lower surface of the frame 2, and a lock movably accommodated in the pin case 22. A pin 23; a biasing spring 24 that biases the lock pin 23 toward the lock position; and a trigger member 25 that prevents the lock pin 23 from moving to the lock position and holds the lock pin 23 in the standby position. ing.

  The pin case 22 has a pair of locking claws 22a (shown in FIG. 4), and the pair of locking claws 22a are locked in the locking holes 2a (shown in FIG. 2) of the frame 2. As a result, the pin case 22 is fixed to the frame 2. The pin case 22 has a cylindrical pin accommodating chamber 22b for accommodating the lock pin 23 and the urging spring 24 at the standby position. Further, the pin case 22 has a pair of elastic locking claws 22c which are pin locking means which protrude into the moving area from the standby position of the lock pin 23 to the lock position on the lower end position side of the pin accommodating chamber 2b. . The pair of elastic locking claws 22c are arranged at positions that cannot be seen from above through the trigger hole 7 (see FIG. 2).

  As shown in detail in FIG. 3, the locking hole 21 and the lock pin 23 are set to face each other in a state where the lock rod 10 is located at the steering lock position.

  In the above configuration, when a person carrying the electronic key rotates an ignition key cylinder (not shown) from the OFF position to the ON position to run the vehicle, the lock rod 10 is moved by driving a motor unit (not shown). Thus, the steering lock position in FIG. 3 is changed to the steering unlock position. Thereafter, when the ignition key cylinder is moved to the engine start position, the engine is started.

  When the person carrying the electronic key returns the ignition key cylinder from the engine starting position to the off position to park the vehicle, the engine is stopped and the lock rod 10 is moved by driving a motor unit (not shown). Then, the steering unlock position shifts to the steering lock position of FIG.

  In this tearing lock state, a person who attempts to unlock the electric steering lock device 1 illegally may attack the cover 3 from the outside. When the cover 3 is illegally attacked and the cover 3 is removed from the frame 2, the trigger member 25 moves in the pin releasing direction “a” at that time, and the movement restriction of the lock pin 23 is released as shown in FIG. 3. . Then, the lock pin 23 moves from the standby position to the lock position direction b by the spring force of the urging spring 24, and the lock pin 23 is inserted into the locking hole 21 of the lock rod 10 and locked as shown in FIG. The rod 10 is locked.

  Here, when the lock pin 23 is moved from the standby position to the lock position, the pair of elastic locking claws 22 c bend and deform in the direction c outside the movement area of the lock pin 23 to allow the movement of the lock pin 23. When the lock pin 23 moves to the lock position, as shown in FIGS. 5 and 6, the pair of elastic locking claws 22 c bend and return to a position that prevents the lock pin 23 from moving to the standby position side. To position.

  As shown in FIG. 7, even if a person who intends to release illegally inserts a wire or the like from the trigger hole 7 to remove the biasing spring 24 and tries to move the lock pin 23 from the lock position, The elastic locking claw 22c is not moved by the movement restriction, and the lock position is maintained. Therefore, it is possible to reliably cope with the illegal attack of the deadlock means 20 as described above, and the anti-theft performance is extremely excellent.

  In this embodiment, since the pin lock means is composed of a pair of elastic locking claws 22c provided on the frame 2 side, the pin lock means can be produced by changing the setting on the frame 2 side.

  In this embodiment, since the pair of elastic locking claws 22c is located at a position that cannot be seen through the trigger hole 7 of the frame 2 in a state where the lock pin 23 is located at the locked position, Attacks can be made difficult, and the anti-theft performance can be further improved.

  8 (a) is a front view of a lock pin according to another embodiment, FIG. 8 (b) is a side view of the lock pin, and FIG. 8 (c) is a sectional view taken along the line DD of FIG. 8 (a). is there.

  In the embodiment described above, the pair of elastic locking claws 22c, which are pin locking means, are provided on the pin case 22, but in this other embodiment, the pair of elastic locking claws 30a are provided on the lock pin 30. Yes. Specifically, as shown in FIGS. 8A to 8C, a notch 30b is provided at an appropriate position of the lock pin 30, and a pair of elastic locking claws 30b are integrally formed using the notch 30b. Is provided. When the lock pin 30 moves from the standby position to the lock position, the pair of elastic locking claws 30a bend and deform in the diameter reducing direction d to allow the lock pin 30 itself to move, and when the lock pin 30 moves to the lock position. It bends in the diameter expansion direction e and returns and deforms to prevent the lock pin 30 itself from moving toward the standby position.

  Also in this other embodiment, as in the above-described embodiment, it is possible to reliably deal with an unauthorized attack of the deadlock means 20, and it is extremely excellent in the anti-theft property.

  In this other embodiment, since the pin lock means is composed of a pair of elastic locking claws 30a provided on the lock pin 30 side, the pin lock means can be produced by a design change on the lock pin 30 side.

  In each of the above embodiments, the trigger member 25 is provided integrally with the cover 3 and is positioned by the cover 3. However, as in the conventional example, the trigger member 25 is positioned by a drive mechanism (not shown), and the drive mechanism However, the trigger member 25 may be shifted in the direction of releasing the movement of the lock pin 23 when it is shifted from the normal assembly position.

  In each of the above embodiments, the pin locking means is constituted by a pair of elastic locking claws 22c, 30a. However, any means can be used as long as it can lock the lock pins 23, 30 shifted to the lock position to the lock position. .

  In the above embodiment, the case where the present invention is applied to the electric steering lock device 1 has been described. However, the present invention can also be applied to a mechanical steering lock device in which the lock rod 14 is moved by using an operation force from a mechanical key as power. Of course.

1 is a plan view of an electric steering lock device according to an embodiment of the present invention. 1 is a plan view of a frame, showing an embodiment of the present invention. FIG. 2 shows the embodiment of the present invention, and is a cross-sectional view taken along the line AA of FIG. It is a figure of the pin case and lock pin which showed one Embodiment of this invention and was seen from the B arrow direction of FIG. FIG. 2 shows the embodiment of the present invention, and is a cross-sectional view taken along the line AA of FIG. FIG. 6 shows an embodiment of the present invention and is a view of a pin case and a lock pin as viewed from the direction of arrow C in FIG. 5. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 in a state where the lock pin is located at the locking position and the urging spring is removed, showing an embodiment of the present invention. (A) is a front view of the lock pin which concerns on other embodiment, (b) is a side view of the lock pin, (c) is the DD sectional view taken on the line of Fig.8 (a). It is principal part sectional drawing of the steering lock apparatus of a prior art example.

Explanation of symbols

1 Electric steering lock device (steering lock device)
2 Frame 3 Cover 6 Rod guide hole 7 Trigger hole 10 Lock rod 20 Deadlock means 21 Locking hole (locking part)
22 pin case 22c elastic locking claw (pin lock means)
23 Lock pin 24 Biasing spring (Biasing means)
30 lock pin 30a elastic locking claw (pin lock means)

Claims (4)

A lock rod that is inserted into a rod guide hole formed in the frame and is movable between a steering lock position and a steering unlock position; and a deadlock means that locks the lock rod in the steering lock position. ,
The deadlock means includes a locking portion provided on the lock rod, a lock pin disposed on the frame side and biased by a biasing means on a lock position side to be locked to the locking portion, and the lock A trigger member that prevents the pin from moving to the lock position and holds the lock pin in the standby position;
The steering lock device is configured such that when an improper external force is applied, the trigger member releases the restriction of movement of the lock pin, and the lock pin moves to a lock position,
A steering lock device, wherein the deadlock means is provided with pin lock means for locking the lock pin shifted to the lock position to the lock position. The steering lock device according to claim 1,
The pin lock means is an elastic locking claw provided on the frame side,
When the lock pin moves from the standby position to the lock position, the elastic locking claw bends and deforms outside the movement area of the lock pin to allow the lock pin to move, and the lock pin moves to the lock position. A steering lock device characterized in that when it moves to the position, it bends and deforms to prevent the lock pin from moving to the standby position side. The steering lock device according to claim 1,
The pin lock means is an elastic locking claw provided on the lock pin, and the elastic locking claw is bent and deformed in a reduced diameter direction when the lock pin is moved from the standby position to the lock position. The steering lock device is characterized in that, when the lock pin moves to the lock position, the lock pin is bent and deformed in the diameter increasing direction to prevent the lock pin from moving to the standby position side. A steering lock device according to claim 2 or claim 3,
The steering lock device according to claim 1, wherein the elastic locking claw is disposed at a position where the elastic locking claw cannot be seen through the trigger hole of the frame in a state where the lock pin is positioned at the lock position.

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