WO2008050664A1

WO2008050664A1 - Electric steering lock device

Info

Publication number: WO2008050664A1
Application number: PCT/JP2007/070318
Authority: WO
Inventors: Koichiro Sugimoto; Tetsuyuki Tsukano
Original assignee: Alpha Corporation
Priority date: 2006-10-26
Filing date: 2007-10-18
Publication date: 2008-05-02
Also published as: DE112007002415T5; JP4863839B2; JP2008105603A

Abstract

A drive mechanism section is placed on a frame (2) covered by a cover (3). A dead lock mechanism (20) has an engagement hole (21) formed in a lock rod (14), a lock pin (23) placed on the frame (2) side, engaged with the engagement hole (21), and urged to the side of a lock position and also has a trigger member (25) fixed to the cover (3) and preventing movement of the lock pin (23) to the lock position. When the cover (3) moves in the direction of separation from the frame (2), the trigger member (25) is displaced in a pin releasing direction and the lock pin (23) is engaged with the engagement hole (21). The cover (3) is provided with weak sections (7, 8, 9) that are weak strengthwise, and the weak sections (7, 8, 9) are at positions that surround portions to which the trigger member (25) is fixed and at positions that are in the periphery of a portion in which the frame (2) is fitted.

Description

Specification

Electric steering lock device

Technical field

The present invention relates to an electric steering lock device that is mounted on an automobile or the like and includes a so-called deadlock mechanism.

Background art

[0002] A conventional electric steering lock device of this type is disclosed in Patent Document 1. As shown in FIGS. 1 and 2, the electric steering lock device 100 includes a frame 101 and a cover (not shown) that covers the upper surface of the frame 101. The frame 101 includes a frame main body 102 and a rod guide portion 103 protruding from the frame main body 102.

[0003] On the upper surface of the frame main body 102 covered with the cover, there are a drive motor (not shown) controlled by the operation of the ignition key of the person carrying the electronic key, and a cam that rotates by the drive of the drive motor. Members (not shown) and the like are accommodated. In the rod guide portion 103, a lock rod 105 whose upper end protrudes on the frame body 102 is movably accommodated. The lock rod 105 is composed of an upper rod portion 105a and a lower rod portion 105b connected to the upper rod portion 105a, and is configured to lock the steering shaft 110 by the rotation of the cam member (not shown). 1) and the unlocked position (position in Fig. 2) allowing the steering shaft 110 to rotate.

[0004] In a middle portion between the base end portion of the rod guide portion 103 and the upper rod portion 105a of the lock rod 105, weak portions 106 and 107 having a smaller thickness than the other portions are provided.

[0005] The deadlock mechanism 120 includes a lock pin 121 housed in a position below the fragile portion 106 of the rod guide portion 103, a first spring 122 that urges the lock pin 121 in the protruding direction, and a lock pin 121 A lock control member 123 that restricts movement in the protruding direction, a second panel 124 that urges the lock control member 123 upward, and a stopper 125 on the frame body 101 side that restricts upward movement of the lock control member 123. And first and second locking grooves 126 and 127 formed in the upper rod portion 105a. [0006] In the above configuration, when the person carrying the electronic key moves the idling key from the off position to the on position so as to run the vehicle, the driving force of the driving motor (not shown) moves the lock pad 105 force S, The electric steering lock device 100 changes from the steering lock state of FIG. 1 to the steering unlock state of FIG. Then, when the ignition key is rotated to the engine start position, the engine is started. When the vehicle suddenly decelerates while the vehicle is running and the driver's knee hits the electric steering lock device 100 and an impact exceeding the specified value is applied, the rod guide 103 and the lock rod 105 are located at the fragile portions 106 and 107. This will reduce the impact received by the driver.

[0007] Then, when the rod guide portion 103 and the lock rod 105 are divided by the fragile portions 106, 107, the lock control member 123 moves upward by the spring force of the second spring 124, as shown in FIG. The lock pin 121 is locked in the second locking groove 127 of the lock rod 105. Thereby, even after the electric steering lock device 100 is divided, the unlocked state of the steering shaft 110 is maintained, and driving safety is ensured.

[0008] Further, when the person carrying the electronic key returns the ignition key from the engine start position to the off position to park the vehicle, the engine is stopped and the lock rod 105 is driven by the drive motor (not shown). The electric steering lock device 100 moves from the steering unlocked state shown in FIG. 2 to the steering locked state shown in FIG.

[0009] In this steering lock state, when a person who attempts to unlock the electric steering lock device 100 from the outside attacks and the impact exceeding the predetermined value is transferred to the electric steering lock device 100, the rod guide portion 103 and the lock rod 105 are divided at the weak parts 106 and 107. Then, as shown in FIG. 4, the lock control member 123 is moved upward by the panel force of the second panel 124, and the lock pin 121 is locked in the first locking groove 126 of the lock rod 105. Thereby, even after the electric steering lock device 100 is divided, the locked state of the steering shaft 110 is maintained, so that the anti-theft property is excellent.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-231122

Disclosure of the invention

[0010] However, the deadlock mechanism 120 of the conventional electric steering lock device 100 allows the person who performs unauthorized unlocking to apply an external force exceeding a predetermined value to the rod guide portion 103 and the lock rod 105. It works only for illegal attacks that act. Therefore, if a cover (not shown) is illegally attacked without applying an external force exceeding a predetermined value to the rod guide portion 103 and the lock rod 105, the rod guide portion 103 and the lock rod 105 do not operate. If the cover (not shown) is removed from the frame body 102 in a state where the deadlock mechanism 120 is not activated, the possibility of unauthorized unlocking increases, and this must be prevented.

[0011] Here, in order to deal with an illegal attack on the cover, it is considered that the cover can be configured with a very strong member in terms of force S, weight, and cost. At the same time, there is a limit to the structure for preventing the cover from breaking. Therefore, it is not satisfactory as a means of dealing with illegal cover attacks.

[0012] Accordingly, an object of the present invention is to provide an electric steering lock device that can reliably cope with an unauthorized attack that illegally opens a cover.

[0013] In order to achieve the above object, a first aspect of the present invention includes a drive mechanism provided in a frame covered with a cover, and a lock rod movably disposed in the rod guide hole of the frame. And a mechanism that is moved between a steering lock position and a steering unlock position by the drive mechanism, and a deadlock mechanism that locks the lock rod to a steering lock position. A locking portion provided on the lock rod; a lock pin disposed on the frame side and biased to a lock position side to be locked to the locking portion; and a lock position of the lock pin fixed to the cover A trigger member that prevents movement of the trigger member when the cover moves in a direction away from the frame. The lock pin is configured to shift in a pin releasing direction so that the lock pin is locked to the locking portion, and the cover is surrounded by a portion that surrounds the fixed portion of the trigger member and the frame. Provided is an electric steering lock device in which a weak portion is provided at a peripheral portion of the door.

[0014] According to the above configuration, when an unauthorized person unlocks the cover, the cover is easily deformed / damaged at the weak part, so that the entire cover is detached from the frame or a part of the cover is It is broken together with the trigger member. When the entire cover is removed from the frame, or when the broken portion of the cover that has been broken together with the trigger member is removed from the cover, the trigger member moves in the pin releasing direction at that time, and the lock pin is moved to the lock rod. Lock The Therefore, it is possible to reliably deal with unauthorized attacks that open the cover illegally, and it has excellent anti-theft performance.

[0015] Further, since it is not necessary to form the cover with a strong material, it contributes to weight reduction and cost reduction.

[0016] Further, according to the above configuration, it is possible to effectively cope with an illegal attack from the upper surface portion of the cover and an attack from the side surface portion of the cover.

[0017] A second aspect of the present invention is a drive mechanism portion on a frame covered with a cover, and a lock rod that is automatically disposed in a rod guide hole of the frame, and is provided by the drive mechanism portion. A mechanism that is moved between a steering lock position and a steering unlock position, and a deadlock mechanism that locks the lock rod in a steering lock position, and the deadlock mechanism is provided in the lock rod. A locking member that is disposed on the frame side and is urged toward the locking position to be locked to the locking portion; and a trigger member that is fixed to the cover and prevents movement of the locking pin to the locking position And when the cover moves in the direction of detachment from the frame, the trigger member force S changes in the pin release direction, Kkupin with is configured to lock with the locking portion, said cover to provide an electric stearyl § ring-locking device is also configured strength weaker than the frame.

[0018] According to the above configuration, when a person who performs unauthorized unlocking attacks the cover, the cover is easily deformed or damaged and detached from the frame. When the cover is removed from the frame, the trigger member moves in the pin releasing direction and the lock pin locks the lock rod. Therefore, it is possible to reliably deal with unauthorized attacks such as unauthorized opening of the cover, and it has excellent anti-theft performance.

[0019] Further, since the cover may be formed of a material that is weak in strength, it contributes to weight reduction and cost reduction.

[0020] Further, in the above configuration, at least one of the surfaces of the trigger member and the lock pin that contact each other may be provided on a tapered surface.

[0021] According to the above configuration, if the trigger member is divided due to an unauthorized attack even if the cover does not come off the frame, the urging force that urges the lock pin toward the lock position causes the taper surface to be urged. The trigger member moves in the pin release direction because it acts on the trigger member via the lock pin force S locks the lock rod. Therefore, it is possible to cope with an illegal attack before the cover is removed from the frame or when the cover is not removed from the frame.

[0022] Further, in the above configuration, the weak portion of the force bar provided in the vicinity of the fixed portion of the trigger member is provided in a portion surrounding the spring receiving portion that urges the lock rod toward the steering lock position. You may do it.

[0023] According to the above configuration, when trying to make a hole in a part of the cover in the vicinity of the lock rod, the force S that part of the cover easily breaks along the fragile part, One trigger and a spring receiving part are attached. Therefore, the trigger member moves in the pin releasing direction by the biasing force of the panel, and the lock pin locks the lock rod. Therefore, it is possible to cope with illegal attacks such as making a hole in a part of the cover.

In the above configuration, the cover may be made of synthetic resin and the trigger member may be formed in a body.

[0025] According to the above configuration, the trigger member can be easily manufactured by integrally molding the trigger member at the time of injection molding of the cover.

Brief Description of Drawings

FIG. 1 is a cross-sectional view showing a steering lock state of a conventional electric steering lock device.

FIG. 2 is a cross-sectional view showing a steering unlock state of a conventional electric steering lock device.

FIG. 3 is a cross-sectional view when the deadlock mechanism is operated in a steering unlocked state.

FIG. 4 is a cross-sectional view when the deadlock mechanism is operated in a steering lock state.

FIG. 5 is a plan view of the electric steering lock device according to the embodiment of the present invention.

FIG. 6 is a front view of the electric steering lock device according to the embodiment of the present invention.

FIG. 7 is a bottom view of the cover, showing an embodiment of the present invention.

FIG. 8 shows an embodiment of the present invention and is a cross-sectional view taken along line 8-8 in FIG.

FIG. 9 shows an embodiment of the present invention and is a cross-sectional view taken along line 99 of FIG.

FIG. 10 shows an embodiment of the present invention and is a cross-sectional view taken along line 10-10 of FIG. FIG. 11 shows an embodiment of the present invention and is an enlarged view of a portion E in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION

As shown in FIGS. 5 to 10, an electric steering lock device 1 that is an electric 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 fitting a plurality of fitting claws 4 provided on the outer peripheral edge of the frame 2 and a plurality of fitting holes 5 provided on the outer peripheral edge of the cover 3. Yes.

[0028] The cover 3 is formed of a synthetic resin having a mechanical strength weaker than that of the frame 2, and also has a force with the upper surface portion 3a and the four side surface portions 3b. On the upper surface portion 3a of the cover 3, the following trigger member 25 is integrally provided. A spring receiving portion 6 is provided in the vicinity of the fixed portion of the trigger member 25. On the upper surface portion 3a of the cover 3, an inner fragile portion 7 that is weak in strength is formed so as to surround both the fixing portion of the trigger member 25 and the outer periphery of the spring receiving portion 6. On the upper surface portion 3a of the cover 3, an outer fragile portion 8 that surrounds the outer periphery of the inner fragile portion 7 and a part of which is also used as the inner fragile portion 7 is formed. Further, on the side surface portion 3b of the cover 3, two linear weakened portions 9 are formed between the respective fitting holes 5 and the lower end edge.

[0029] On the upper surface of the frame 2 covered with the cover 3, an ignition key (not shown) that can be rotated by a person carrying the electronic key, and the drive control is performed by the rotation operation of the ignition key. Motor unit 10, a worm gear (not shown) fixed to the output shaft of the motor unit 10, a worm wheel 11 that fits the worm gear, and a cam portion 12 that is integrally attached to the side surface of the worm wheel 11. Etc. are housed. The motor unit 10 includes a drive motor (not shown) and a speed reduction mechanism (not shown) that decelerates and outputs the motor rotation. The motor unit 10, the worm gear (not shown), and the worm wheel 11 The cam mechanism 12 constitutes a drive mechanism.

A rod guide hole 13 is formed in the frame 2. One end side of the rod guide hole 13 opens to the upper surface of the frame 2 covered with the cover 3, and the other end side opens to the outside.

[0031] Is the lock rod 14 a rod guide? It is placed in L13 so that it can move freely. At the upper end of the lock rod 14, a hanger portion 15 that protrudes in the horizontal direction is provided on the body. The lower surface of the hanger portion 15 is in contact with the cam portion 12. In addition, a rod spring 16 (shown in FIG. 9) is interposed between the spring receiving portion (not shown) of the lock rod 14 and the spring receiving portion 6 of the cover 3. The lower surface of the hanger portion 15 is pressed against the cam portion 12 by the spring force of the rod spring 16. As a result, the lock rod 14 moves following the cam surface of the cam portion 12 to lock the steering shaft (not shown) and the steering lock position (the positions shown in FIGS. 6, 8, and 9) and the steering. It moves between steering unlock positions that allow rotation of a shaft (not shown).

[0032] The deadlock mechanism 20 includes a locking hole 21 which is a locking portion provided in the lock rod 14, a pin housing 22 fixed to the lower surface of the frame 2, and a movable inside the pin housing 22. Lock pin 23 accommodated in the housing, an urging panel 24 that urges the lock pin 23 toward the lock position, and a trigger whose upper end is fixed to the cover 3 and prevents the lock pin 23 from moving to the lock position. And a member 25.

As shown in detail in FIG. 8, when the locking hole 21 and the lock pin 23 are positioned at the lock rod 14 force S steering hook position, they are set at positions facing each other. Further, as shown in detail in FIG. 11, the teno surfaces 23a and 25a are formed on the outer peripheral surface of the lock pin 23 and the lower end surface of the trigger member 25, respectively, and the tapered surfaces 23a and 25a are in surface contact with each other. It is locked in this way. When the cover 3 moves in the direction away from the frame 2, the trigger member 25 changes in the pin release direction a (shown in FIG. 8) and the lock pin 23 moves in the lock direction b (shown in FIG. 8). The lock pin 23 is locked in the locking hole 21.

[0034] When the person carrying the electronic key turns on the switch (not shown) to drive the vehicle, the lock rod 14 is driven by the motor unit 10 driven by the generation of the unlock signal. Moves and shifts from the steering lock position shown in FIGS. 8 and 9 to the steering unlock position. Then, when the ignition key is moved to the engine start position, the engine is started.

[0035] When the person carrying the electronic key returns the ignition key from the engine start position to the off position to park the vehicle, the engine is stopped and the lock rod 14 is moved by driving the motor unit 10. Then, the steering unlock position is changed to the steering lock position shown in FIGS.

[0036] In this steering lock state, a person who attempts to unlock the electric steering lock device 1 may attack the cover 3 from the outside. If the side surface 3b of the cover 3 is improperly attacked, it will be easily deformed or damaged at the location of the linear fragile portion 9, The whole of 3 is out of frame 2. When the entire cover 3 is removed from the frame 2, the trigger member 25 moves in the pin releasing direction a at that time, and the lock pin 23 is inserted into the locking hole 21 of the lock rod 14, and the lock rod 14 force S is locked. The In addition, if the upper surface 3a of the cover 3 is illegally attacked, it easily deforms or breaks at the inner weak part 7 or the outer weak part 8, so a part of the cover 3 is provided with a trigger member 25. It breaks in the state. When the broken piece of the cover 3 is removed from the cover 3, the trigger member 25 moves in the pin release direction a at that time, and the lock pin 23 locks the lock rod 14;? Callocked. As a result, in the electric steering lock device 1, the locked state of the steering shaft (not shown) is maintained, and a person who has attempted to unlock the wheel cannot rotate the steering shaft freely.

[0037] As described above, according to the above embodiment, when the cover 3 receives an unauthorized attack, it breaks at each of the weak portions 7, 8, and 9, thereby controlling the breakage of the cover 3. It can reliably deal with unauthorized attacks such as unauthorized opening of the cover 3 and has excellent anti-theft performance. In addition, since it is not necessary to form the cover 3 with a material that is particularly strong in terms of strength, molding processing and the like are facilitated, contributing to weight reduction and cost reduction.

[0038] In this embodiment, since the inner fragile portion 7, the outer fragile portion 8 and the plurality of lower fragile portions 9 are provided as the fragile portions, the unauthorized attack from the upper surface portion 3a of the cover 3 and the cover 3 Can effectively cope with the attack from the side portion 3b. In particular, the inner fragile portion 7 can appropriately deal with an illegal attack targeting the lock rod 14. However, the position and the number of the fragile portions are appropriately determined in consideration of the installation conditions of the electric steering lock device 1 on the vehicle, various illegal attack patterns, and the like, which are not limited to the above-described embodiment.

In this embodiment, both surfaces of the trigger member 25 and the lock pin 23 that are in contact with each other are provided on the taper surfaces 25a and 23a. Therefore, even if the cover 3 does not come off from the frame 2, if the trigger member 25 is divided due to an unauthorized attack, the urging force F by the urging spring 24 acts on the trigger member 25 via the tapered surfaces 25a, 23a, and The trigger member 25 is moved in the pin releasing direction a by the component force F1 of the urging force F, and locked to the lock pin 23 force S lock rod 14 by the panel force of the urging panel 24. Therefore, the cover 3 is removed from the frame 2. It is possible to deal with illegal attacks before the cover 3 or the cover 3 is not removed from the frame 2. It should be noted that at least one of the abutting surfaces of the trigger member 25 and the lock pin 23 is provided on a tapered surface!

[0040] In this embodiment, the inner fragile portion 7 provided around the fixed portion of the trigger member 25 is provided at a position surrounding the spring receiving portion 6 that urges the lock rod 14 toward the steering lock position. For this reason, when trying to make a hole in a part of the cover 3 in the vicinity of the lock rod 14, the force S at which a part of the cover 3 easily breaks along the inner fragile part 7, a fragment of this force bar 3 The trigger member 25 and the spring receiving portion 6 are attached to the door. Accordingly, when a part of the cover 3 is broken, the trigger member 25 is immediately moved in the pin releasing direction a by the urging force of the rod panel 16, and the lock pin 23 locks the lock rod 14. Therefore, it is possible to cope with an illegal attack that makes a hole in a part of the cover 3.

[0041] In this embodiment, the cover 3 is made of synthetic resin, and the trigger member 25 is formed into a body. For this reason, the trigger member 25 can be easily manufactured by integrally forming the trigger member 25 during the injection molding of the cover 3.

[0042] Next, another embodiment of the present invention will be described. The other embodiment is different from the cover 3 of the above embodiment in that the cover 3 itself is configured to be weak in strength. The configuration other than the cover is the same as that of the above embodiment.

[0043] According to this other embodiment, when a person who performs unauthorized unlocking attacks the cover, the cover is easily deformed / damaged and removed from the frame. When the cover is removed from the frame, the trigger member moves in the pin releasing direction at that time, and the lock pin locks the lock rod. Therefore, it is possible to reliably deal with unauthorized attacks that open the cover illegally, and it has excellent anti-theft performance. In addition, it is only necessary to form the cover with a weak material, which contributes to weight reduction and cost reduction.

In each embodiment, a mechanical electric steering lock that moves the lock rod 14 by using the operation force of the mechanical key force as the power when the present invention is applied to the electric steering lock device 1 Of course, it can also be applied to the apparatus.

Claims

The scope of the claims

[1] A drive mechanism provided on a frame covered with a cover;

A lock rod movably disposed in the rod guide hole of the frame, which is moved between a steering lock position and a steering unlock position by the drive mechanism;

A deadlock mechanism that locks the lock rod in a steering lock position, and the deadlock mechanism,

A locking portion provided on the lock rod;

A lock pin disposed on the frame side and biased to a lock position side to be locked to the locking portion;

A trigger member fixed to the cover and preventing movement of the lock pin to a lock position;

When the cover moves in the direction away from the frame, the trigger member changes in the pin release direction, and the lock pin is engaged with the engagement portion. Is an electric steering lock device in which weak portions weak in strength are provided in a portion surrounding a fixed portion of the trigger member and a peripheral portion of a fitting portion with the frame.

[2] A drive mechanism on a frame covered with a cover;

A lock rod that is automatically disposed in a rod guide hole of the frame, and is moved between a steering lock position and a steering unlock position by the drive mechanism;

A locking portion provided on the lock rod;

A trigger member fixed to the cover and preventing movement of the lock pin to a lock position; When the cover moves in the direction away from the frame, the trigger member changes in the pin release direction, and the lock pin is engaged with the engagement portion. An electric steering lock device configured to be weaker than the frame.

[3] The electric steering lock device according to claim 1,

An electric steering lock device in which a taper surface is provided on at least one of the surfaces of the trigger member and the lock pin that contact each other.

[4] The electric steering lock device according to claim 2,

[5] The electric steering lock device according to claim 1,

The electric steering lock device, wherein the weak portion of the cover provided around the trigger member fixing portion is provided at a portion that encloses a spring receiving portion that biases the hook rod toward the steering lock position.

[6] The electric steering lock device according to claim 1,

The electric steering lock device, wherein the cover is made of a synthetic resin and the trigger member is formed on the body.

[7] The electric steering lock device according to claim 2,