JP4863839B2 - Electric steering lock device - Google Patents

Description

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

  A conventional electric steering lock device of this type is disclosed in Patent Document 1. As shown in FIGS. 8 and 9, 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.

  On the upper surface of the frame main body 102 covered with the cover, a drive motor (not shown) controlled by the operation of the ignition key of the person carrying the electronic key, and a cam member (not shown) rotated by the drive of the drive motor. Etc.) are housed. 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 includes an upper rod portion 105a and a lower rod portion 105b connected to the upper rod portion 105a. The lock rod 105 locks the steering shaft 110 by the rotation of the cam member (not shown) (the position shown in FIG. 8). ) And the unlock position (position of FIG. 9) allowing the steering shaft 110 to rotate.

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

  The deadlock means 120 includes a lock pin 121 housed at 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 protruding direction of the lock pin 121. A lock control member 123 that restricts the movement of the lock, a second spring 124 that biases the lock control member 123 upward, a stopper 125 on the frame body 101 side that restricts the upward movement of the lock control member 123, and an upper rod First and second locking grooves 126 and 127 formed in the portion 105a are provided.

  In the above configuration, when the person carrying the electronic key moves the ignition key from the OFF position to the ON position in order to travel the vehicle, the lock rod 105 is moved by driving of a drive motor (not shown), and the electric steering lock device 100 is The steering lock state shown in FIG. 8 is changed to the steering unlock state shown in FIG. Thereafter, 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 of a predetermined value or more is applied, the rod guide portion 103 and the lock rod 105 are located at the weak portions 106 and 107. This will reduce the impact on the driver.

  When the rod guide portion 103 and the lock rod 105 are divided by the fragile portions 106 and 107, the lock control member 123 is moved upward by the spring force of the second spring 124 as shown in FIG. Is locked in the second locking groove 127 of the lock rod 105. Thus, 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.

  In addition, 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 moved by driving a drive motor (not shown). The electric steering lock device 100 changes from the steering unlock state of FIG. 9 to the steering lock state of FIG.

In this steering lock state, when a person who attempts to unlock the electric steering lock device 100 from the outside attacks and an impact of a predetermined value or more is applied to the electric steering lock device 100, the rod guide portion 103 and the lock rod 105 Is divided at the locations of the fragile portions 106 and 107. Then, as shown in FIG. 11, the lock control member 123 moves upward by the spring force of the second spring 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.
JP 2004-231122 A

  However, the deadlock means 120 of the conventional electric steering lock device 100 operates only when an unauthorized person performs an unauthorized attack that causes the rod guide portion 103 and the lock rod 105 to exert an external force exceeding a predetermined value. . 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 a cover (not shown) is removed from the frame body 102 in a state where the deadlock means 120 is not activated, the possibility of unauthorized unlocking increases, and this needs to be prevented.

  Here, in order to cope with an unauthorized attack on the cover, it is conceivable to construct the cover with a very strong member, but this leads to an increase in weight and cost, There is a limit to the fracture prevention structure. Therefore, it is not satisfactory as a countermeasure against an unauthorized attack of the cover.

  SUMMARY OF THE INVENTION 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.

  According to the first aspect of the invention for achieving the above object, a drive mechanism is disposed on a frame covered with a cover, a lock rod is movably disposed in a rod guide hole of the frame, and the lock rod is driven. An electric steering lock device that includes a deadlock means that moves between a steering lock position and a steering unlock position by a mechanism and locks the lock rod at a steering lock position, wherein the deadlock means A locking portion provided on the lock rod, a lock pin disposed on the frame side and biased toward the lock position to be locked to the locking portion, and fixed to the cover, to the lock position of the lock pin A trigger member for preventing the movement of the cover, and when the cover moves in the direction of detachment from the frame The trigger member shifts in the pin releasing direction, and the lock pin is configured to be locked to the locking portion, and the cover includes a portion surrounding the fixing portion of the trigger member and the frame. A weak portion that is weak in strength is provided in a peripheral portion of the fitting portion.

A second aspect of the present invention is the electric steering lock device according to the twelfth aspect of the invention, wherein the fragile portion is provided in a portion surrounding a fixed portion of the trigger member and a peripheral portion of a fitting portion with the frame. The invention according to claim 3 is characterized in that a drive mechanism is disposed on a frame covered with a cover, a lock rod is movably disposed in a rod guide hole of the frame, and the lock rod is driven. An electric steering lock device that includes a deadlock means that moves between a steering lock position and a steering unlock position by a mechanism and locks the lock rod at a steering lock position, wherein the deadlock means A locking portion provided on the lock rod and a lock disposed on the frame side and locked to the locking portion A lock pin that is biased to a position side, and a trigger member that is fixed to the cover and prevents the lock pin from moving to the lock position, and when the cover moves in the direction of detachment from the frame, The trigger member shifts in the pin releasing direction so that the lock pin is locked to the locking portion, and the cover is configured to be weaker than the frame.

  According to a fourth aspect of the present invention, in the electric steering lock device according to any one of the first to third aspects, at least one of the surfaces of the trigger member and the lock pin that contact each other is provided on a tapered surface. It is characterized by that.

  A fifth aspect of the present invention is the electric steering lock device according to the second or fourth aspect, wherein the weak portion of the cover provided around the fixed portion of the trigger member is configured so that the lock rod is positioned on the steering lock position side. It is provided in the site | part which encloses the spring receiving part urged | biased together.

  A sixth aspect of the present invention is the electric steering lock device according to any one of the first to fifth aspects, wherein the cover is made of a synthetic resin and the trigger member is integrally formed. It is characterized by that.

  According to the first aspect of the present invention, when an unauthorized person unlocks the cover, the cover is easily deformed / damaged at the fragile portion, so that the entire cover is detached from the frame or a part of the cover is removed. It is broken together with the trigger member. And when the whole cover is removed from the frame, or when the broken part 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 becomes the lock rod Lock. Therefore, it is possible to surely cope with an unauthorized attack such as unauthorized opening of the cover, and the anti-theft property is excellent.

  In addition, since it is not necessary to form the cover with a strong material, it contributes to weight reduction and cost reduction.

  According to the second aspect of the present invention, 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.

  According to the invention of claim 3, 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 surely cope with an unauthorized attack such as unauthorized opening of the cover, and the anti-theft property is excellent.

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

  According to the invention of claim 4, in addition to the effects of the inventions of claims 1 to 3, the lock pin is attached to the lock position side if the trigger member is divided by an unauthorized attack even if the cover is not detached from the frame. Since the urging force to be applied acts on the trigger member via the tapered surface, the trigger member moves in the pin releasing direction, and the lock pin 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.

  According to the invention of claim 5, in addition to the effect of the invention of claim 2 or claim 4, when trying to make a hole in a part of the cover in the vicinity of the lock rod, a part of the cover extends along the fragile part. Although it breaks easily, a trigger member and a spring receiving part are attached to the broken piece of the cover. Therefore, the trigger member moves in the pin releasing direction by the biasing force of the spring, and the lock pin locks the lock rod. Therefore, it is possible to cope with an illegal attack such as making a hole in a part of the cover.

  According to the sixth aspect of the present invention, in addition to the effects of the first to fifth aspects of the invention, the trigger member can be easily manufactured by integrally forming the trigger member at the time of injection molding of the cover.

  Hereinafter, an embodiment 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 front view of the electric steering lock device, FIG. 3 is a bottom view of a cover, and FIG. 5 is a cross-sectional view taken along line BB in FIG. 1, FIG. 6 is a cross-sectional view taken along line CC in FIG. 2, and FIG. 7 is an enlarged view of a portion E in FIG.

  As shown in FIGS. 1 to 6, the 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.

  The cover 3 is formed of a synthetic resin having a mechanical strength lower than that of the frame 2 and includes an upper surface portion 3a and four side surface portions 3b. A trigger member 25 described below is integrally provided on the upper surface portion 3 a of the cover 3. A spring receiving portion 6 is provided in the vicinity of the fixed portion of the trigger member 25. On the upper surface portion 3 a 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 3 a of the cover 3, an outer fragile portion 8 that surrounds the outer periphery of the inner fragile portion 7 and is partially used as the inner fragile portion 7 is formed. Further, on the side surface portion 3b of the cover 3, two linear fragile portions 9 are formed between the respective fitting holes 5 and the lower end edge.

  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 a motor unit 10 that is driven and controlled by the rotation operation of the ignition key, A worm gear (not shown) fixed to the output shaft of the motor unit 10, a worm wheel 11 meshing with the worm gear, a cam portion 12 attached integrally to the side surface of the worm wheel 11, and the like are accommodated. Yes. The motor unit 10 includes a drive motor (not shown) and a speed reduction mechanism (not shown) that decelerates and outputs the motor rotation, and includes the motor unit 10, a worm gear (not shown), a worm wheel 11, and a cam. The drive mechanism part is comprised by the part 12. FIG.

  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.

  The lock rod 14 is movably disposed in the rod guide hole 13. A hanger portion 15 that protrudes in the horizontal direction is integrally provided at the upper end of the lock rod 14. The lower surface of the hanger portion 15 is in contact with the cam portion 12. Also, a rod spring 16 (shown in FIG. 5) 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. 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 (position shown in FIGS. 2, 4 and 5) and the steering shaft (not shown). Move between the steering unlock positions that allow rotation.

  The deadlock means 20 includes a locking hole 21 as a locking portion provided in the lock rod 14, a pin housing 22 fixed to the lower surface of the frame 2, and a lock movably accommodated in the pin housing 22. A pin 23, an urging spring 24 that urges the lock pin 23 toward the lock position, and a trigger member 25 whose upper end is fixed to the cover 3 and prevents the lock pin 23 from moving to the lock position are provided. .

  As shown in detail in FIG. 4, the locking hole 21 and the lock pin 23 are set at positions facing each other when the lock rod 14 is located at the steering lock position. As shown in detail in FIG. 7, tapered 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, so that the tapered surfaces 23a and 25a are in surface contact with each other. Are locked. When the cover 3 moves in the direction of detachment from the frame 2, the trigger member 25 changes in the pin release direction a (shown in FIG. 4), and the lock pin 23 moves in the lock direction b (shown in FIG. 4). The lock pin 23 is locked in the locking hole 21.

  In the above configuration, when a person carrying the electronic key turns on a switch (not shown) to run the vehicle, the lock rod 14 is moved by the drive of the motor unit 10 by the generation of the unlock signal, and FIGS. Transition from the steering lock position to the steering unlock position. Thereafter, when the ignition key is moved to the engine start position, the engine is started.

  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 and the steering unlock is performed. The position shifts to the steering lock position shown in FIGS. 4 and 5.

  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 portion 3b of the cover 3 is illegally attacked, the cover 3 is easily deformed / damaged at the location of the linear weak portion 9, so that the entire cover 3 is detached from the 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 is locked. . Further, when the upper surface portion 3a of the cover 3 is illegally attacked, it easily deforms or breaks at the location of the inner fragile portion 7 or the outer fragile portion 8, so that the cover 3 is partially attached with the trigger member 25. Torn. When the broken piece of the cover 3 is removed from the cover 3, the trigger member 25 moves in the pin releasing direction “a” at that time, and the lock pin 23 fits into the locking hole 21 of the lock rod 14. Locked. As a result, the electric steering lock device 1 maintains the locked state of the steering shaft (not shown), and a person who attempts to unlock the wheel cannot rotate the steering shaft freely.

  As described above, according to the present invention, when the cover 3 is subjected to an unauthorized attack, the cover 3 is broken at each of the weakened portions 7, 8, and 9 so that the breakage of the cover 3 can be controlled. It is possible to deal with illegal attacks like this, and it has excellent anti-theft performance. Further, 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.

  In this embodiment, since the inner fragile portion 7, the outer fragile portion 8, and the plurality of linear fragile portions 9 are provided as the fragile portions, the unauthorized attack from the upper surface portion 3 a of the cover 3 and the side surface portion 3 b of the cover 3 are provided. Each attack can be effectively dealt with. 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 not limited to the above-described embodiment, and are determined as appropriate assuming the installation conditions of the electric steering lock device 1 on the vehicle, various illegal attack patterns, and the like.

  In this embodiment, since both surfaces of the trigger member 25 and the lock pin 23 that are in contact with each other are provided on the tapered surfaces 25a and 23a, the trigger member 25 is divided by an unauthorized attack even if the cover 3 is not detached from the frame 2. Then, the urging force F by the urging spring 24 acts on the trigger member 25 via the taper surfaces 25a and 23a, and the trigger member 25 is moved in the pin releasing direction a by the component force F1 of the urging force F. The lock pin 23 is locked to the lock rod 14 by the spring force of the force spring 24. Accordingly, it is possible to cope with an illegal attack before the cover 3 is removed from the frame 2 or even when the cover 3 is not removed from the frame 2. It should be noted that at least one of the surfaces of the trigger member 25 and the lock pin 23 that are in contact with each other may be provided on the tapered surface.

  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. 14, a portion of the cover 3 is easily broken along the inner fragile portion 7, and the broken piece of the cover 3 includes a trigger member 25 and a spring. The receiving part 6 will be attached. Accordingly, when a part of the cover 3 is broken, the trigger member 25 immediately moves in the pin releasing direction a by the urging force of the rod spring 16 and the lock pin 23 locks the lock rod 14. Therefore, it is possible to cope with an illegal attack that opens a hole in a part of the cover 3.

  In this embodiment, the cover 3 is made of synthetic resin and the trigger member 25 is integrally formed. Therefore, the trigger member 25 can be easily formed by integrally forming the trigger member 25 when the cover 3 is injection molded. Can be made.

  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.

  According to another 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 surely cope with an unauthorized attack such as unauthorized opening of the cover, and the anti-theft property is excellent. Further, since the cover may be formed of a material that is weak in strength, it contributes to weight reduction and cost reduction.

  In each embodiment, the case where the present invention is applied to the electric steering lock device 1 is shown. However, the present invention is also applied to a mechanical electric steering lock device that moves the lock rod 14 by using an operation force from a mechanical key as power. Of course you can.

1 is a plan view of an electric steering lock device according to an embodiment of the present invention. 1 is a front view of an electric steering lock device according to an embodiment of the present invention. FIG. 3 is a bottom view of the cover according to the embodiment of the present invention. FIG. 2 shows an embodiment of the present invention and is a cross-sectional view taken along line AA in FIG. 1. FIG. 2 is a cross-sectional view taken along line BB in FIG. 1, showing an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line CC of FIG. 2, showing an embodiment of the present invention. FIG. 5 shows an embodiment of the present invention and is an enlarged view of a portion E in FIG. 4. It is sectional drawing which shows the steering lock state of the conventional electric steering lock apparatus. It is sectional drawing which shows the steering unlocked state of the conventional electric steering lock apparatus. It is sectional drawing when a deadlock means act | operates in a steering unlocked state. It is sectional drawing when a deadlock means act | operates in a steering lock state.

Explanation of symbols

1 Electric steering lock device 2 Frame 3 Cover 7 Inner fragile part (fragile part)
8 Outer fragile part (fragile part)
9 Linear vulnerable part (fragile part)
10 Motor unit (drive mechanism)
11 Worm wheel (drive mechanism)
12 Cam part (drive mechanism part)
13 Lock guide hole 14 Lock rod 20 Deadlock means 21 Locking hole (locking part)
23 Lock pin 23a Tapered surface 25 Trigger member 25a Tapered surface

Claims (6)

A drive mechanism portion is disposed on a frame covered with a cover, and a lock rod is movably disposed in a rod guide hole of the frame, and the lock rod is moved to a steering lock position and a steering unlock position by the drive mechanism portion. And move between
An electric steering lock device provided with deadlock means for locking the lock rod in a 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 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 of detachment from the frame, the trigger member changes in the pin release direction, and the lock pin is engaged with the engagement portion, and the cover includes The electric steering lock device is characterized in that weak portions weak in strength are provided in a portion surrounding the fixing portion of the trigger member and a peripheral portion of the fitting portion with the frame. The electric steering lock device according to claim 1,
The electric steering lock device according to claim 1, wherein the weakened portion is provided at a portion of the cover surrounding the fixing portion of the trigger member and a peripheral portion of a fitting portion with the frame. A drive mechanism portion is disposed on a frame covered with a cover, and a lock rod is movably disposed in a rod guide hole of the frame, and the lock rod is moved to a steering lock position and a steering unlock position by the drive mechanism portion. And move between
An electric steering lock device provided with deadlock means for locking the lock rod in a 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 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 of detachment from the frame, the trigger member changes in the pin release direction, and the lock pin is configured to be locked to the locking portion,
The electric steering lock device, wherein the cover is configured to be weaker in strength than the frame. The electric steering lock device according to any one of claims 1 to 3,
An electric steering lock device, wherein at least one of the abutting surfaces of the trigger member and the lock pin is provided on a tapered surface. The electric steering lock device according to claim 2 or 4,
The electric steering lock device characterized in that the weak portion of the cover provided around the fixed position of the trigger member is provided at a portion surrounding the spring receiving portion that urges the lock rod toward the steering lock position. . The electric steering lock device according to any one of claims 1 to 5,
The electric steering lock device, wherein the cover is made of synthetic resin and the trigger member is integrally formed.

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