JP2009101980A - Electric steering lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric steering lock device capable of preventing moving of a lock member in an unlocking direction when locking the lock member and preventing a vehicle theft during parking. <P>SOLUTION: This electric steering lock device is provided with a worm wheel 8 rotating in the unlocking direction and locking direction by driving a motor 6, first cam part and second cam part provided in the worm wheel 8, the lock member 11 which follows the first cam part and is displaced between a lock position and an unlock position, and a lever member 12 which follows the second cam part, is located at a waiting position for allowing moving of the lock member 11 when the lock member 11 is located at an unlocked position and is located at a retention position to prevent moving of the lock member 11 to the unlocked position side when the lock member 11 is moved to the locked position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric steering lock device that locks rotation of a steering shaft of an automobile.

  A conventional electric steering lock device of this type is disclosed in Patent Document 1. As shown in FIG. 17, the electric steering lock device 100 is urged by a coil spring 101 in the direction of the steering shaft 102 of the automobile, and is driven by a lock member 103 that can be fitted to the steering shaft 102 and a motor 104. A rotating body 106 that is connected and has a cam groove 105; and a pin 107 that moves the locking member 103 between a locked position and an unlocked position by moving along the cam groove 105 as the rotating body 106 rotates; A lock stopper 109 that is interlocked with the operation of the pin 107 and biased in the direction of the lock member 103 by a coil spring 108 is provided. The lock stopper 109 is interlocked with the operation of the pin 107 and engages with a part of the lock member 103 in a state where the lock member 103 is moved from the unlock position to the lock position, so that the lock member 103 moves in the unlock direction. To regulate.

  In the above configuration, when the motor 104 is rotated in the locking direction during parking, the rotating body 106 is rotated in the locking direction by the driving force of the motor 104 and the pin 107 swings the cam groove 105 as the rotating body 106 rotates. By moving, the lock member 103 moves from the unlock position to the lock position, and the lock stopper 109 restricts movement of the lock member 103 in the unlock direction. As a result, the front end of the lock member 103 is fitted to the steering shaft 102, and the rotation of the steering shaft 102 is prevented, so that the automobile cannot be steered.

Thereafter, when the motor 104 is rotated in the unlocking direction, the rotating body 106 is rotated in the unlocking direction by the driving force of the motor 104, and the pin 107 swings in the cam groove 105 as the rotating body 106 rotates in the reverse direction. By moving, the movement restriction of the lock member 103 by the lock stopper 109 is released, and the lock member 103 moves from the lock position to the lock release position. As a result, since the fitting with the steering shaft 102 is released, the rotation of the steering shaft 102 becomes free and the vehicle can be steered.
JP 2006-44573 A

  However, the conventional electric steering lock device 100 prevents the vehicle from being stolen during parking by preventing the rotation of the steering shaft 102 by the lock member 103 during parking and keeping the vehicle in an unmanageable state. The steering shaft 102 is locked by an act of opening a small through hole in the cover of the steering lock device 100 and moving the lock member 103 to the unlocking position side directly through the through hole (so-called soft attack). There was concern that the car was forcibly released and the parked car was stolen.

  Accordingly, an object of the present invention is to provide an electric steering lock device that can prevent movement of the lock member fitted to the steering shaft during locking in the unlocking direction and prevent vehicle theft during parking. .

  The invention according to claim 1, which achieves the above object, comprises a rotating body that rotates in an unlocking direction and a locking direction by driving a drive source, a first cam portion and a second cam portion provided on the rotating body, and the first cam portion. A lock member that moves between a lock position that follows the cam portion and prevents the rotation of the steering shaft and a lock release position that allows the rotation of the steering shaft is housed in a component housing chamber formed by the housing and the cover. The electric steering lock device includes: a lever member that slidably engages with the lock member while following the second cam portion, and the lever member is located at the unlock position. In a state where the lock member is allowed to move, the lock member is unlocked when the lock member is located at the lock position. Characterized in that located in the holding position to prevent movement of the position.

  The invention according to claim 2 is the electric steering lock device according to claim 1, wherein the lock member is provided with a lock holding engagement groove extending along a direction orthogonal to the moving direction of the lock member, and the lock member The lever member is provided with an engagement piece that engages with the lock holding engagement groove in a state where the lever member is in the lock position and the lever member is in the hold position.

  A third aspect of the invention is the electric steering lock device according to the first or second aspect, wherein the housing is provided with a through hole into which the lock member is removably inserted.

  A fourth aspect of the present invention is the electric steering lock device according to the first or second aspect, wherein the lever member is covered with the cover.

  The invention according to claim 5 is the electric steering lock device according to claim 1 or 2, characterized in that the rotating body is accommodated in a drive unit chamber formed of a drive unit housing and a drive unit cover. .

  According to a sixth aspect of the present invention, a rotating body that rotates in the unlocking direction and the locking direction by driving of a driving source, a first cam portion and a second cam portion provided on the rotating body, and the first cam portion are followed. An electric steering lock that accommodates a lock member that displaces between a lock position that prevents rotation of the steering shaft and a lock release position that allows rotation of the steering shaft in a component housing chamber formed by the housing and the cover. And a lever member that slidably engages and disengages with the lock member while following the second cam portion, the lever member being in a state in which the lock member is located at the unlock position, and the lock member. In a state where the lock member is located, the lock member is located at a holding position that prevents the lock member from moving toward the unlock position, and the lock member is located at the unlock position. When moving between the locked position, characterized in that positioned in the standby position for allowing movement of said locking member.

  A seventh aspect of the present invention is the electric steering lock device according to the sixth aspect, wherein the lock holding engagement groove and the release holding engagement groove extending along a direction orthogonal to the moving direction of the lock member include the lock member. And engaging the lock holding engagement groove or the release holding groove with the lock member positioned at the lock position or the unlock position and the lever member positioned at the hold position. A combination piece is provided on the lever member.

  According to the first aspect of the present invention, when the rotating body rotates in the unlocking direction by driving the drive source when unlocking, the first cam portion and the second cam portion provided on the rotating body are interlocked, and the second cam portion Following this, the lever member moves to the standby position where the movement of the lock member is allowed, and the lock member is displaced from the lock position to the unlock position following the first cam portion. As a result, since the rotation of the steering shaft is allowed, the vehicle can be steered. On the other hand, when the rotating body rotates in the locking direction by driving the drive source at the time of locking, the locking member is displaced from the unlocking position to the locking position following the first cam portion, and the lever member is following the second cam portion. Moves to a holding position that prevents the lock member from moving toward the unlocking position. As a result, the rotation of the steering shaft is prevented by the lock member, so that the automobile cannot be operated. As a result, since the lever member is engaged with the lock member fitted to the steering shaft at the time of locking, even if the lock member is forcibly pulled out in the unlocking direction, the lock member can be prevented from moving in the unlocking direction. The vehicle theft during parking can be prevented.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the lever member moves to the standby position that allows the movement of the lock member following the second cam portion provided on the rotating body when the lock is released. At the same time, since the engaging piece of the lever member is disengaged from the lock holding engaging groove of the lock member, the lock member can move from the lock position to the lock release position following the first cam portion. On the other hand, when the locking member is displaced from the unlocking position to the locking position following the first cam portion during locking, and the lever member is moved to the holding position following the second cam portion, the engaging piece of the lever member is moved. Since the lock member is engaged with the lock holding engagement groove, the lock member is prevented from moving from the lock position to the lock release position.

  According to the third aspect of the invention, in addition to the effects of the first and second aspects of the invention, the lock member is inserted into the through-hole provided in the cover so as to freely enter and exit, so that the lock member is firmly supported. It is possible to protect against a destructive act of forcibly unlocking by operating the lock member from the outside.

  According to the invention of claim 4, in addition to the effects of the inventions of claims 1 and 2, since the lever member is covered with the cover, the lever member is operated from the outside to forcibly unlock. Can be protected from vandalism.

  According to the fifth aspect of the invention, in addition to the effects of the first and second aspects of the invention, the worm wheel is housed in the drive unit chamber and covered with the drive unit housing and the drive unit cover, so the worm wheel is removed from the outside. Can be prevented, and can be protected from vandalism to force unlocking.

  According to the invention of claim 6, since the lever member is engaged with the lock member fitted to the steering shaft at the time of locking, the unlocking direction of the lock member is forced even if the lock member is forcibly pulled out in the unlocking direction. Can be prevented, and theft of the vehicle during parking can be prevented.

  Further, since the lever member is engaged with the lock member positioned at the unlocking position at the time of unlocking, the lock member can be moved in the locking direction in a state where the unlocked state must be maintained such as during traveling of the vehicle. A fail-safe function can be provided.

  According to the invention of claim 7, in addition to the effect of the invention of claim 6, the second cam portion provided on the rotating body is provided when the locked state is changed to the unlocked state and when the unlocked state is changed to the locked state. The lever member moves to a standby position where the movement of the lock member is allowed to follow, and the engagement piece of the lever member is released from the lock holding engagement groove or the release holding position of the lock member. Following this, the lock member can move from the lock position to the lock release position, or from the lock release position to the lock position. On the other hand, when locking and releasing the lock, the locking member follows the first cam portion and moves to the unlocking position or the locking position, and when the lever member moves to the holding position following the second cam portion, the lever Since the engagement piece of the member engages with the lock holding engagement groove or the release holding groove of the lock member, the movement of the lock member from the lock position to the lock release position is prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 9 show a first embodiment of the present invention, FIG. 1 is a plan view of an electric steering lock device 1, FIG. 2 is a front view of the electric steering lock device 1, and FIG. 3 is along the line A in FIG. 4 is a cross-sectional view taken along line BB in FIG. 1, FIG. 5 is a cross-sectional view taken along line CC in FIG. 1, FIG. 6 is a cross-sectional view taken along line DD in FIG. Fig. 8 is a front view of a lock member 11 provided in the steering lock device 1, Fig. 8 is a perspective view of the main part showing the state of the worm wheel 8, the lock member 11 and the lever member 12 during locking, and Fig. 9 is a worm wheel during unlocking. FIG. Each of FIGS. 3 to 6 is a sectional view showing a state at the time of locking, each of FIG. 3 to FIG. 6 is a sectional view showing a state at the start of operation of the lever member, and FIG. (C) of FIG. 6 is sectional drawing which shows the state at the time of the operation start of a locking member, and each (d) of FIGS. 3-6 is sectional drawing which shows the state at the time of unlocking.

  As shown in FIGS. 1 to 9, the electric steering lock device 1 is assembled with each other, and a cover 2 and a housing 3 that form a component accommodating chamber therein, and are accommodated in the component accommodating chamber, and further inside the drive unit chamber. The drive unit housing 4 and the drive unit cover 5 forming the motor, the motor 6 as a drive source disposed in the drive unit chamber, the worm gear 7 fixed to the rotating shaft 6a of the motor 6, and the worm gear 7 mesh with the drive unit chamber. A worm wheel 8 rotatably supported by the worm wheel 8, a first cam portion 9 provided integrally on one surface of the worm wheel 8, and a second cam portion 10 provided integrally on the other surface of the worm wheel 8. A locking member 11 that slides in the direction of arrow a in FIG. The lever member 12 that follows the second cam portion 10 and slides in the direction of arrow b in FIG. 3A and a circuit board (not shown) disposed in the component storage chamber are provided as main components. ing.

  As shown in FIG. 5, the cam surface of the first cam portion 9 includes a lock position area 9a (bottom dead center area) where the lock member 11 is in the lock position, and a lock release position area where the lock member 11 is in the lock release position. 9b (top dead center area) and a lift area 9c between them. Similarly, as shown in FIG. 3, the cam surface of the second cam portion 10 includes a holding position area 10a having the lever member 12 as a holding position, a standby position area 10b having the lever member 12 as a standby position, and these It is divided into a lifting area 10c.

  As shown in FIGS. 7 to 9, the lock member 11 has a flat plate shape and a flat rod portion 13 having a spring receiving surface 13 a formed by a notch, and a horizontal direction from above the flat rod portion 13. The protruding cam engaging portion 14 and a shaft locking protrusion 15 provided at the lower end of the flat rod portion 13 are configured. A lock holding engagement groove 16 extending in a direction orthogonal to the moving direction of the lock member 11 is provided on one side surface of the flat rod portion 13. The flat rod portion 13 is inserted into the through hole 3a of the housing 3 so as to freely enter and exit and is supported so as to be movable up and down. The lock member 11 has a lock position in which the shaft locking projection 15 protrudes outside through a through hole 3a provided in the housing 3 to prevent rotation of a steering shaft (not shown) ((a in FIGS. 3 to 5). ) And a lock release position (position (d) in FIGS. 3 to 5) that allows rotation of the steering shaft (not shown). A coil spring 17 is interposed between the spring receiving surface 13 a and the cover 2, and the lock member 11 is urged in the direction in which the first cam portion 9 is pressed (locking direction) by this spring force.

  One end of the lever member 12 engages with the second cam portion 10 and is bent at a right angle from one side of the flat plate portion 18 that is provided so as to be movable in the horizontal direction, and the lock member 11 is locked. It is composed of an engagement piece 19 that engages with the lock holding engagement groove 16 when moved to the position. The lever member 12 has a standby position (positions (d) in FIGS. 3 to 6) that allows the movement of the lock member 11, and the engagement piece 19 engages with the lock holding engagement groove 16 of the lock member 11. The lock member 11 moves between the holding positions (positions (a) in FIGS. 3 to 6) that prevent the lock member 11 from moving toward the lock position. The lock member 11 is movably inserted into an insertion hole 3 b formed in the housing 3, and is urged toward the second cam portion 10 by a coil spring 20.

  Next, the operation of the electric steering lock device 1 will be described. When the lock member 11 shown in FIGS. 3 to 6 and FIG. 8 is locked, the cam engaging portion 14 of the lock member 11 is engaged with the lock position area 9a of the first cam portion 9. Since the shaft locking projection 15 of the lock member 11 protrudes from the housing 3 and fits into the steering shaft of the automobile (not shown), the rotation of the steering shaft is prevented, so that the automobile is kept in an unmanageable state. At this time, when one end of the lever member 12 is engaged with the holding position area 10 a of the second cam portion 10, the lever member 12 moves to the holding position, and the engagement piece 19 of the lever member 12 locks the lock member 11. Since it is inserted into the holding engagement groove 16, the movement of the lock member 11 toward the lock release position is prevented.

  Next, when the rotation of the motor 6 in the unlocking direction is started, the worm wheel 8 is rotationally driven through the rotating shaft 6a and the worm gear 7, so that as shown in each of FIGS. When one end of the lever member 12 is engaged with the elevation area 10c of the two cam portions 10, the lever member 12 starts to move from the holding position to the standby position. At this time, since the engagement piece 19 of the lever member 12 is still inserted into the lock holding engagement groove 16 of the lock member 11, the movement of the lock member 11 to the lock release position side is prevented.

  Further, when the motor 6 rotates in the unlocking direction, the cam engaging portion 14 of the lock member 11 engages with the lift area 9c of the first cam portion 9 as shown in each of FIGS. As a result, the lock member 11 starts moving from the lock position to the lock release position. At this time, the shaft locking protrusion 15 of the lock member 11 still protrudes from the housing 3 and is fitted to the steering shaft. At the same time, when one end of the lever member 12 is engaged with the standby position area 10 b of the second cam portion 10, the lever member 12 moves to the standby position, and the engagement piece 19 of the lever member 12 holds the lock member 11 locked. Since the engagement groove 16 is disengaged, the lock member 11 is allowed to move toward the unlock position.

  Next, when the motor 6 further rotates in the unlocking direction, the unlocked state shown in each of FIGS. 3 to 6 (d) and FIG. 9 is obtained, the movement of the lock member 11 is allowed, and the first cam portion 9 When the cam engaging portion 14 of the lock member 11 is engaged with the lock release position area 9b, the lock member 11 is moved to the lock release position, and the shaft locking projection 15 is retracted into the housing 3, so that the steering shaft Since the rotation is allowed, the automobile is in a state where it can be steered.

  Next, when returning to the locked state again, when the worm wheel 8 is rotated in the locking direction by driving the motor 6, the lock member 11 is displaced from the unlocked position to the locked position following the first cam portion 9, and the second Following the cam portion 10, the lever member 12 moves to a holding position that prevents the lock member 11 from moving to the unlocking position side. As a result, since the rotation of the steering shaft is prevented, the vehicle cannot be operated.

  As described above, in the present invention, the lock member 11 is fitted to the steering shaft during locking, and the engagement piece 19 of the lever member 12 is engaged with the lock holding engagement groove 16 of the lock member 11. Since it can be prevented from moving in the unlocking direction, it is locked from the act of opening a small through hole in the cover 2 or the housing 3 and moving the lock member 11 directly from the outside to the unlock position (so-called soft attack). The member 11 can be protected, and the locked state of the steering shaft can be forcibly released during parking and the vehicle can be prevented from being stolen. Further, the lock member 11 is inserted into the through hole 3a provided in the housing 3 so as to freely enter and exit, and the lock member 11 is firmly supported so that the lock member 11 is operated from the outside to forcibly unlock. In this respect, it is possible to improve the anti-theft property (performance for preventing vehicle theft) during parking. Furthermore, even if the coil spring 17 that urges the lock member 11 in the locking direction at the time of locking is removed, the lock member 11 is held in the locked position by the weight of the lock member 11. But it can improve the anti-theft property while parking.

  In this embodiment, since the lever member 12 is covered with the housing 3, it can be protected from the destructive action of operating the lever member 12 from the outside to forcibly unlock it.

  In this embodiment, the worm wheel 8 is accommodated in the drive unit chamber, covered with the drive unit housing 4 and the drive unit cover 5, and sandwiched between the lock member 11 and the drive unit housing 4, so that the worm wheel 8 is removed from the outside. And can be protected from a destructive act of forcibly unlocking by operating the worm wheel 8 from the outside. Since the worm wheel 8 meshes with the worm gear 7 fixed to the rotation shaft 6a of the motor 6, the worm wheel 8 is self-locking when the motor 6 is stopped, so that the worm wheel 8 is moved in the unlocking direction. Rotation is prevented. Therefore, since the locking state of the steering shaft by the lock member 11 is maintained, the anti-theft property during parking can be improved.

  10 to 16 show a second embodiment of the present invention, FIG. 10 is a plan view of the electric steering lock device 1A, FIG. 11 is a front view of the electric steering lock device 1A, and FIG. 12 is a line EE in FIG. 13 is a cross-sectional view taken along line FF in FIG. 10, FIG. 14 is a cross-sectional view taken along line GG in FIG. 11, and FIG. 15 is a cross-sectional view taken along line H-H in FIG. FIG. 16 is a front view of a lock member 11A provided in the steering lock device 1A. In addition, each (a) of FIGS. 12-15 is sectional drawing which shows the state at the time of locking, Each (b) of FIGS. 12-15 is sectional drawing which shows the state at the time of the action | operation start of 11 A of locking members, FIG. Each (c) of FIG. 15 is a sectional view showing a state at the time of unlocking. Also. 10 to 16, the same components as those shown in FIGS. 1 to 9 described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 10 to 16, the electric steering lock device 1 </ b> A is assembled with each other, and the housing 3 and the cover 2 that form a component accommodating chamber therein, are accommodated in the component accommodating chamber, and further inside the drive unit chamber. The drive unit housing 4 and the drive unit cover 5 forming the motor, the motor 6 as a drive source disposed in the drive unit chamber, the worm gear 7 fixed to the rotating shaft 6a of the motor 6, and the worm gear 7 mesh with the drive unit chamber. The worm wheel 8 is rotatably supported by the first worm wheel 8, the first cam portion 9 provided integrally on one surface of the worm wheel 8, and the second cam portion 10 A provided integrally on the other surface of the worm wheel 8. The lock moves up and down following the first cam portion 9 (in the direction of arrow a in FIG. 12A). A member 11A, a lever member 12 that slides in the horizontal direction (in the direction of arrow b in FIG. 12A) following the second cam portion 10A, and a circuit board (not shown) disposed in the component storage chamber. It is provided as a main component.

  As shown in FIG. 12, the cam surface of the second cam portion 10A has a holding position area (top dead center) 10a having the lever member 12 as a holding position and a standby position area (bottom dead center) having the lever member 12 as a standby position. Point) 10b and lift areas 10c and 10d arranged between them.

  As shown in FIG. 16, the lock member 11A has a flat plate shape and a flat rod portion 13A in which a spring receiving surface 13a is formed by a notch, and is protruded in the horizontal direction from above the flat rod portion 13A. The cam engaging portion 14 and a shaft locking protrusion 15 provided at the lower end of the flat rod portion 13A are configured. On one side surface of the flat rod portion 13A, two lock holding engagement grooves 16 and 16A extending in a direction orthogonal to the moving direction of the lock member 11 are provided at a predetermined distance. The lock member 11 </ b> A has a lock position in which the shaft locking protrusion 15 protrudes outside from the through hole 3 a provided in the cover 2 and prevents rotation of the steering shaft (not shown) ( ) And a lock release position (positions (c) in FIGS. 12 to 15) that allow rotation of a steering shaft (not shown). A coil spring 17 is interposed between the spring receiving surface 13a and the housing 3, and the lock member 11A is urged in the direction in which the first cam portion 9 is pressed (locking direction) by this spring force.

  One end of the lever member 12 is engaged with the second cam portion 10A and is bent at a right angle from one side of the flat plate portion 18 provided so as to be movable in the horizontal direction, and the lock member 11A is locked. When it is moved to the position, it engages with the lock holding engagement groove 16, and when the lock member 11A is moved to the lock release position, the engagement piece 19 engages with the other release holding engagement groove 16A. It is configured.

  Next, the operation of the electric steering lock device 1A will be described. 12 to 15, when the lock member 11 </ b> A is locked, the cam engagement portion 14 of the lock member 11 </ b> A engages with the lock position area 9 a of the first cam portion 9. Since the shaft locking projection 15 protrudes from the cover 2 and fits into a steering shaft of a vehicle (not shown), the rotation of the steering shaft is prevented, so that the vehicle is kept in an unmanageable state. At this time, when one end of the lever member 12 is engaged with the holding position area 10a of the second cam portion 10A, the lever member 12 is moved to the holding position, and the engagement piece 19 is one lock holding member of the lock member 11A. Since it is inserted in the joint groove 16, the movement of the lock member 11A toward the lock release position is prevented.

  Next, when the rotation of the motor 6 in the unlocking direction is started, the worm wheel 8 is rotationally driven via the rotating shaft 6a and the worm gear 7, so that the lever member 12 is moved to one lifting area 10c of the second cam portion 10A. When the one end is engaged, the lever member 12 moves from the holding position toward the standby position. Next, as shown in each of FIGS. 12 to 15 (b), when one end of the lever member 12 is engaged with the standby position area 10b of the second cam portion 10A, the lever member 12 is moved to the standby position. Since the engagement piece 19 is disengaged from the lock holding engagement groove 16 of the lock member 11A, the lock member 11A is allowed to move to the lock release position side. Further, when the cam engaging portion 14 of the lock member 11A is engaged with the lift area 9c of the first cam portion 9, the lock member 11A starts to move from the lock position to the lock release position.

  Further, the motor 6 rotates in the unlocking direction, and one end of the lever member 12 engages with the other lifting / lowering area 10d of the second cam portion 10A, whereby the lever member 12 moves from the standby position toward the holding position. . Next, when the unlocked state shown in each of FIG. 12 to FIG. 15C is reached, the lock engagement member 14 of the lock member 11 </ b> A is engaged with the lock release position area 9 b of the first cam portion 9. 11A moves to the unlocking position, the shaft locking projection 15 moves back into the cover 2, and the steering shaft is allowed to rotate, so that the automobile can be steered. At this time, when one end of the lever member 12 is engaged with the holding position area 10a of the second cam portion 10A, the lever member 12 is moved to the holding position, and the engagement piece 19 is the other release holding member of the lock member 11A. Since it is inserted into the joint groove 16A, the movement of the lock member 11A toward the lock release position is prevented.

  Next, when returning from the unlocked state shown in each of FIGS. 12 to 15 to the locked state again, when the worm wheel 8 rotates in the locking direction by driving the motor 6, the lever follows the second cam portion 10A. After the member 12 moves from the holding position to the standby position and the lock member 11A changes from the unlocking position to the locking position following the first cam portion 9, each of FIGS. The lock member 11A shown is locked. At this time, since the lever member 12 moves to the holding position and the engagement piece 19 is inserted into the lock holding engagement groove 16 of the lock member 11A, the movement of the lock member 11A toward the lock release position is prevented.

  As described above, according to the present invention, in addition to the effects of the first embodiment described above, it is possible to prevent the steering shaft from being locked due to a malfunction of the lock member 11A for some reason during traveling of the vehicle. It is possible to prevent the vehicle from entering a state and to improve the so-called fail-safe performance of the automobile.

  In the second embodiment, since the movement of the lock member 11A is prevented by the lever member 12 that moves linearly by driving the second cam portion 10A, the movement of the lock member is prevented by the rotating lever member. Compared to the above, space can be saved and the operation of the lock member 11A is relatively simple, so that the operation timing of the lock member 11A can be easily taken and the design is easy.

  In this embodiment, the lock member 11A is provided with a release holding groove 16A in addition to the lock holding engagement groove 16, and the engagement piece 19 is engaged with the lock holding engagement groove 16 and the release holding groove 16A, respectively. Thus, the lock member 11A is held in the locked position or the unlocked position. However, the lock holding engagement piece and the release holding engagement piece are formed in the lever member while forming one engagement groove in the lock member. Similar effects can be obtained by forming the engagement groove and each engagement piece to be engaged at the lock position or the unlock position.

1 is a plan view of an electric steering lock device according to a first embodiment of the present invention. 1 is a front view of an electric steering lock device according to a first embodiment of the present invention. 1A and 1B are cross-sectional views taken along line AA in FIG. 1, showing a first embodiment of the present invention, wherein FIG. 1A is a cross-sectional view showing a state at the time of locking, and FIG. Sectional drawing, (c) is a sectional view showing a state at the start of operation of the locking member, (d) is a sectional view showing a state at the time of unlocking. 1A and 1B are cross-sectional views taken along line B-B in FIG. 1, showing a first embodiment of the present invention, wherein FIG. 1A is a cross-sectional view showing a state at the time of locking, and FIG. Sectional drawing, (c) is a sectional view showing a state at the start of operation of the locking member, (d) is a sectional view showing a state at the time of unlocking. 1A and 1B are cross-sectional views taken along line C-C in FIG. 1, showing a first embodiment of the present invention, wherein FIG. 1A is a cross-sectional view showing a state when locking, and FIG. Sectional drawing, (c) is a sectional view showing a state at the start of operation of the locking member, (d) is a sectional view showing a state at the time of unlocking. 2A and 2B are cross-sectional views taken along the line D-D in FIG. 2, in which FIG. 2A is a cross-sectional view illustrating a state at the time of locking, and FIG. Sectional drawing, (c) is a sectional view showing a state at the start of operation of the locking member, (d) is a sectional view showing a state at the time of unlocking. It is a front view of a lock member which shows a 1st embodiment of the present invention and is provided in a steering lock device. It is a principal part perspective view which shows 1st Embodiment of this invention and shows the mode of the worm wheel, the locking member, and the lever member at the time of locking. It is a principal part perspective view which shows 1st Embodiment of this invention and shows the mode of the worm wheel, the locking member, and the lever member at the time of unlocking. It is a top view of an electric steering lock device which shows a 2nd embodiment of the present invention. It is a front view of an electric steering lock device, showing a second embodiment of the present invention. 10 shows a second embodiment of the present invention, and is a cross-sectional view taken along the line E-E of FIG. 10, (a) is a cross-sectional view showing a state at the time of locking, and (b) shows a state at the start of operation of the lock member. Sectional drawing and (c) are sectional drawings which show the state at the time of unlocking. 10 is a cross-sectional view taken along line FF in FIG. 10, showing a second embodiment of the present invention, (a) a cross-sectional view showing a state at the time of locking, and (b) showing a state at the start of operation of the lock member. Sectional drawing and (c) are sectional drawings which show the state at the time of unlocking. 11A and 11B are cross-sectional views taken along the line GG in FIG. 11, in which FIG. 11A is a cross-sectional view illustrating a state at the time of locking, and FIG. 11B illustrates a state at the start of operation of the lock member. Sectional drawing and (c) are sectional drawings which show the state at the time of unlocking. 11A and 11B are cross-sectional views taken along the line H-H in FIG. 11, wherein FIG. 11A is a cross-sectional view illustrating a state at the time of locking, and FIG. 11B illustrates a state at the start of operation of the lock member. Sectional drawing and (c) are sectional drawings which show the state at the time of unlocking. It is a front view of the lock member which shows a 2nd embodiment of the present invention and is provided in a steering lock device. It is explanatory drawing of the electric steering lock apparatus of a prior art example.

Explanation of symbols

1, 1A Electric steering lock device 2 Cover 3 Housing 3a Through hole 3b Insertion hole 4 Drive unit housing 5 Drive unit cover 6 Motor (drive source)
8 Worm wheel (rotating body)
9 First cam portion 10, 10A Second cam portion 11, 11A Lock member 12 Lever member 16 Lock holding engagement groove 16A Release holding engagement groove 19 Engagement piece

Claims (7)

A rotating body that rotates in an unlocking direction and a locking direction by driving a driving source, a first cam portion and a second cam portion provided on the rotating body, and a steering shaft that follows the first cam portion to rotate. In the electric steering lock device for housing the lock member displaced between the blocking lock position and the unlocking position allowing the rotation of the steering shaft in the component housing chamber formed by the housing and the cover,
A lever member that slides detachably with the lock member while following the second cam portion;
The lever member is positioned at a standby position where the lock member is allowed to move in a state where the lock member is positioned at the lock release position, and in a state where the lock member is positioned at the lock position. An electric steering lock device, wherein the electric steering lock device is located at a holding position that prevents movement toward a lock release position. The electric steering lock device according to claim 1,
A lock holding engagement groove extending along a direction orthogonal to the moving direction of the lock member is provided in the lock member;
The electric steering characterized in that the lever member is provided with an engagement piece that engages with the lock holding engagement groove in a state where the lock member is located at the lock position and the lever member is located at the hold position. Locking device. The electric steering lock device according to claim 1 or 2,
An electric steering lock device, wherein the housing is provided with a through hole into which the lock member is removably inserted. The electric steering lock device according to claim 1 or 2,
The electric steering lock device, wherein the lever member is covered with the housing. The electric steering lock device according to claim 1 or 2,
The electric steering lock device, wherein the rotating body is accommodated in a drive unit chamber formed of a drive unit housing and a drive unit cover. A rotating body that rotates in an unlocking direction and a locking direction by driving a driving source, a first cam portion and a second cam portion provided on the rotating body, and a steering shaft that follows the first cam portion to rotate. In the electric steering lock device for housing the lock member displaced between the blocking lock position and the unlocking position allowing the rotation of the steering shaft in the component housing chamber formed by the housing and the cover,
A lever member that slides detachably with the lock member while following the second cam portion;
The lever member is located at a holding position that prevents the lock member from moving toward the lock release position in a state where the lock member is located at the lock release position and a state where the lock member is located at the lock position. The electric steering lock device according to claim 1, wherein when the member moves between the unlocking position and the locking position, the member is located at a standby position that allows the locking member to move. The electric steering lock device according to claim 6,
The lock member is provided with a lock holding engagement groove and a release holding engagement groove extending along a direction orthogonal to the moving direction of the lock member,
In the state where the lock member is located at the lock position or the unlock position, and the lever member is located at the hold position, the engagement piece that engages with the lock hold engagement groove or the release hold groove is An electric steering lock device provided on a lever member.

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