JP2011088456A - Electric steering lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric steering lock device for improving safety by holding a locking member at an unlock position with a simple structure. <P>SOLUTION: The electric steering lock device 1 includes a locking member 6 movable between a lock position where the locking member 6 is engaged with the steering shaft of a vehicle and an unlock position where the engagement is released, an electric motor for actuating the locking member 6, a worm 15 and a worm gear 12a (driving mechanism) for converting a rotational force of an output shaft of the electric motor into an advancing and retracting force of the locking member 6. The movement of the locking member 6 from the unlock position to the lock position is prevented by engaging with an arm (engaging part) 7A provided on a driver 7 of the locking member 6. A spring member 22 is provided elastically deformable to a position where the engagement with the arm 7A is released when an actuating force of a predetermined value or more from the unlock position toward the lock position is applied to the locking member 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electric steering lock device for electrically locking the rotation of a steering wheel when a vehicle is parked.

In recent years, some vehicles are equipped with an electric steering lock device for electrically locking the rotation of a steering wheel during parking for the purpose of preventing theft. The electric steering lock device includes a lock member that can move between a lock position that engages with a steering shaft of a vehicle and an unlock position that releases the engagement, an electric motor that operates the lock member, A drive mechanism for converting the rotational force of the output shaft of the electric motor into the advance / retreat force of the lock member;
It has.

  In such an electric steering lock device, when the driver operates the engine start switch OFF while the engine is operating, this is detected and the electric motor is driven, and the lock member is moved by the electric motor and engaged with the steering shaft. The rotation of the steering wheel is locked by the driver, and when the driver turns on the engine start switch while the engine is stopped, this is detected and the electric motor is driven, and the lock member is moved by the electric motor to steer the lock member. The steering is released by releasing the engagement with the shaft and unlocking the steering wheel.

  By the way, as a drive mechanism of the electric steering lock device, Patent Document 1 has a threaded spindle that is rotated by an electric motor, and an inner thread that moves linearly in the guide and fits into the thread of the threaded spindle. A structure with a driver is disclosed.

  According to the drive mechanism, when the spindle is rotated in one direction by the electric motor, the driver moves toward the steering shaft along the thread of the spindle, and the blocking element (lock member) connected to the driver is the steering shaft. Move to the lock position to engage. Then, when the spindle is reversed by the electric motor, the driver moves along the spindle thread in the direction of detachment from the steering shaft, and the blocking element connected to the driver is released from the engagement with the steering shaft. Move to the locked position.

  In the electric steering lock device provided with such a drive mechanism, if the spindle is unexpectedly rotated due to vibration or the like during traveling of the vehicle, the driver moves and the blocking element moves from the unlocked position to the locked position. And the steering may be locked.

  In order to solve the above problem, Patent Document 1 discloses a mechanism in which when the blocking element is in the unlocked position, the locking lever is engaged with the blocking element to block the movement of the blocking element to the locked position. It has been proposed (see FIG. 2). Patent Document 1 proposes a mechanism including a shaft that operates a fixed lever according to the rotation of a spindle (see FIG. 3).

JP 2000-233717 A

  However, in the mechanism disclosed in FIG. 2 of Patent Document 1, there is a problem that the manufacturing cost increases because a configuration in which the fixed lever is operated by a dedicated electric motor is employed.

  Further, in the mechanism disclosed in FIG. 3 of Patent Document 1, since it is necessary to provide a long shaft from the spindle to the blocking element, there is a problem that the electric steering lock device is enlarged.

  The present invention has been made in view of the above problems, and an object thereof is to provide an electric steering lock device capable of enhancing safety by holding a lock member in an unlock position with a simple configuration. is there.

In order to achieve the above object, the invention according to claim 1
A lock member movable between a lock position that engages with a steering shaft of a vehicle and an unlock position that releases the engagement;
An electric motor for operating the locking member;
A drive mechanism for converting the rotational force of the output shaft of the electric motor into the advance / retreat force of the lock member;
In the electric steering lock device with
Engaging with an engaging portion provided on the locking member to prevent the locking member from moving from the unlocked position to the locked position, and to act on the locking member at a predetermined value or more from the unlocked position toward the locked position. When is added, a spring member that is elastically deformable to a position where the engagement with the engaging portion formed on the lock member is released is provided.

According to a second aspect of the present invention, in the first aspect of the present invention, the operating position detection mechanism detects the operating position of the lock member by the magnet provided on the lock member and a magnetic detection element capable of detecting the magnetic force of the magnet. Configure
The magnet is housed in an end portion, and an arm protruding from the lock member toward the magnetic detection element is used as the engagement portion of the lock member.

  A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the spring member is made of a nonmagnetic material.

  According to the first aspect of the present invention, since the movement of the lock member at the unlock position to the lock position is prevented by the spring member, the lock member can be held at the unlock position with a simple configuration, It is possible to reliably prevent the occurrence of a problem that the locking member in the unlocked position unexpectedly moves to the locked position due to vibration or the like when the vehicle travels and the steering locks, thereby ensuring high safety for the vehicle. . When it is necessary to lock the steering when the vehicle is parked or the like, the electric motor is driven and the lock member is moved from the unlock position to the lock position by a predetermined value or more (more than the restraining force of the lock member by the spring member). Therefore, the spring member is elastically deformed to the position where the engagement with the engaging portion formed on the lock member is released, so that the lock member moves to the lock position and rotates the steering shaft. Lock securely and prevent the vehicle from being stolen.

  According to the second aspect of the present invention, since the arm of the lock member provided with the magnet of the operating position detection mechanism is the engagement portion that engages with the spring member, the engagement portion and the space in which the engagement portion moves. The electric steering lock device can be reduced in cost and size by reducing the number of parts and saving space.

  According to the third aspect of the present invention, since the spring member is made of a non-magnetic material, the spring member is magnetized even when the arm (engaging portion) for holding the magnet is engaged with the spring member. The position of the lock member (arm) by the operating position detection mechanism can always be accurately detected without affecting the operation, and by this detection, the electric motor is driven to control the lock member to the locked position / unlock position. The steering can be locked / unlocked by reliably moving.

It is a longitudinal section showing the locked state of the electric steering lock device concerning the present invention. It is a longitudinal section showing the unlocking state of the electric steering lock device concerning the present invention. 1 is an exploded perspective view of an electric steering lock device according to the present invention. It is a perspective view of the spring member of the electric steering lock device concerning the present invention. It is a figure explaining the effect | action of the spring member of the electric steering lock apparatus which concerns on this invention. It is a bottom view of the case of the electric steering lock device concerning the present invention. It is the perspective view which looked at the case of the electric steering lock device concerning the present invention from the bottom side. It is a bottom view which removes a lid and shows the state before the cover assembly of the electric steering lock device concerning the present invention. It is a bottom view which shows the state after the cover assembly | attachment of the electric steering lock apparatus which concerns on this invention, removing a lid.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a longitudinal sectional view showing a locked state of the electric steering lock device according to the present invention, FIG. 2 is a longitudinal sectional view showing an unlocked state of the electric steering lock device, and FIG. 3 is an exploded perspective view of the electric steering lock device. 4 is a perspective view of the spring member, FIG. 5 is a diagram for explaining the action of the spring member, FIG. 6 is a bottom view of the case, FIG. 7 is a perspective view of the case viewed from the bottom side, and FIG. FIG. 9 is a bottom view showing the state after the cover is assembled with the lid removed, and FIG. 9 is a bottom view showing the state after the cover is assembled with the electric steering lock device.

  The electric steering lock device 1 according to the present invention locks / unlocks the rotation of a steering shaft (steering wheel) (not shown) by electric drive, and the housing 2 is made of metal (for example, magnesium alloy). The case 3 and the resin lid 4 that covers the lower surface opening of the case 3 are configured.

  The case 3 is formed in a rectangular box shape, and an arcuate recess 3a is formed in the upper portion thereof. A column tube (not shown) is fitted into the recess 3a, and the column tube is connected to the case 3. It is fixed to the case 3 by an arcuate bracket (not shown) to be worn. Although not shown, the steering shaft is inserted into the column tube, a steering wheel is connected to the upper end of the steering shaft, and the lower end of the steering shaft is connected to a steering gear box. When the driver rotates the steering wheel, the rotation is transmitted to the steering gear box via the steering shaft, the steering mechanism is driven, the front wheels are steered, and the required steering is performed.

  Further, as shown in FIG. 3, a rectangular connector disposition portion 3b is opened in the side portion of the case 3, and pins other than the side surface on which the connector disposition portion 3b is formed are pinned. A circular hole pin hole 3c (only two are shown in FIG. 3) into which 5 is press-fitted is formed.

  On the other hand, the lid 4 is formed in a rectangular flat plate shape, and on its inner surface (upper surface), there are three block-shaped pinning portions 4A, three columnar cover pressing portions 4B, and a bottomed cylindrical gear holding tube. The part 4C is erected integrally. Here, the three pin fastening portions 4A are formed at locations corresponding to the positions of the pin holes 3c of the case 3, and the circular pin insertion holes 4a (FIG. 3) into which the pins 5 are press-fitted. Is formed with only one).

  Thus, as shown in FIGS. 1 and 2, the lid 4 is fitted into the inner periphery of the lower end of the case 3 so as to cover the lower surface opening of the case 3 from below, and is formed on the side portion of the case 3. The pin 5 inserted through the two pin holes 3c (see FIG. 3) is fixed to the case 3 by press-fitting into the pin insertion holes 4a formed in the three pin fastening portions 4A provided upright on the lid 4.

  Incidentally, as shown in FIGS. 6 and 7, the housing 2 is formed with a lock member storage portion 2A and a substrate storage portion 2B. The lock member storage portion 2A and the substrate storage portion 2B are arranged in the vertical direction. The long and narrow communication portions 2C communicate with each other.

  As shown in FIGS. 1 and 2, a lock member 6 is accommodated in the lock member accommodating portion 2A. The lock member 6 has a substantially cylindrical shape in which a male screw portion 7a is engraved on the outer periphery of the lower end portion. The driver 7 and a plate-like lock bolt 8 accommodated in the driver 7 so as to be movable up and down are constituted. Here, a long hole 8a which is long in the vertical direction is formed in the lock bolt 8. The lock bolt 8 is connected to the driver 7 by a pin 9 which is inserted in the long hole 8a in the horizontal direction. The pin 9 is inserted and held by being press-fitted into a pin insertion hole 7b that is formed in the driver 7 in a lateral direction.

  The lock bolt 8 is fitted in a rectangular insertion hole 3d formed in the case 3 so as to be movable up and down, and is always attached upward by a spring 10 which is compressed between the partition wall 7c of the driver 7 and this. Normally, the lower portion of the long hole 8 a of the lock bolt 8 is engaged with the pin 9 so that the lock bolt 8 moves up and down together with the driver 7.

  Further, an arm 7A as an engaging portion that extends horizontally and an anti-rotation portion 7B that is long in the vertical direction are integrally formed at opposite locations on the upper outer periphery of the driver 7, and the arm 7A is formed in the housing 2 (case 3). ) Is formed so as to be movable up and down, and the rotation preventing portion 7B engages with an engagement groove 3e formed in the case 3 to prevent the driver 7 from rotating. A magnet housing portion 7d having a rectangular cross section is formed at the tip of the arm 7A, and a quadrangular columnar magnet 11 is housed in the magnet housing portion 7d by press-fitting.

  Further, as shown in FIGS. 1 and 2, a cylindrical gear member 12 is rotatably accommodated in the lock member accommodating portion 2A formed in the housing 2, and a lower outer periphery of the gear member 12 is The lid 4 is rotatably held by the gear holding cylinder portion 4 </ b> C erected on the inner surface (upper surface) of the lid 4. And the worm gear 12a is formed in the lower outer periphery of this gear member 12, and the internal thread part 12b is formed in the inner periphery.

  The lower part of the driver 7 is inserted into the gear member 12, and the male screw part 7 a formed on the outer periphery of the lower part of the driver 7 is the female screw part formed on the inner periphery of the gear member 12. 12b is engaged. A spring 13 is compressed between a cylindrical spring receiver 4b formed at the center of the gear holding cylinder 4C of the lid 4 and a partition wall 7c of the driver 7, and the lock member 6 (the driver 7 and the lock 7 are locked). The bolt 8) is always urged upward by the spring 13.

  As shown in FIG. 8, an electric motor 14 is housed in the housing 2 in a horizontally placed state, and a small-diameter worm 15 is formed on the output shaft 14 a of the electric motor 14. The worm 15 is housed in the lock member housing portion 2 </ b> A formed in the housing 2, and meshes with the worm gear 12 a formed on the outer periphery of the gear member 12. Here, the worm 15 and the worm gear 12 a constitute a drive mechanism that converts the rotational force of the output shaft 14 a of the electric motor 14 into the advancing and retracting force of the lock member 6. As shown in FIG. 8, the free end of the output shaft 14 a of the electric motor 14 is rotatably supported by a bearing recess 3 f formed in the case 3.

  On the other hand, as shown in FIGS. 1, 2, 8 and 9, a substrate 16 is accommodated in the substrate accommodating portion 2 </ b> B formed in the housing 2, and this substrate 16 is relative to the inner surface of the case 3. The both ends of the substrate holding groove 3g (see FIGS. 6 and 7) formed in the opposite position are inserted and fixed to the case 3.

  Here, as shown in FIG. 3, first and second Hall elements 17 and 18 as magnetic detection elements are provided at positions corresponding to the lock and unlock positions on the upper and lower surfaces of the inner surface of the substrate 16. The Hall elements 17 and 18 and the magnet 11 constitute an operating position detection mechanism, and the position (lock / unlock position) of the lock member 6 (arm 7A) is detected by the operation position detection mechanism as described later.

  Further, a connector 19 is attached to the board 16, and a connector (not shown) extending from an ECU (not shown) built in the vehicle body is connected to the connector 19, and the first and second hall elements 17, 18 are connected. Is electrically connected to the ECU. The connector 19 is provided with two upper and lower motor power supply terminals 20 which are connected to the electric motor 14, and the motor connection terminal 20 is connected to the electric motor 14 from a battery (not shown). After that, power is supplied. As shown in FIGS. 8 and 9, the connector 19 is incorporated in the connector disposition portion 3 b formed on the side portion of the case 3.

  By the way, in the present embodiment, the communication portion 2C that connects the lock member storage portion 2A and the substrate storage portion 2B formed in the housing 2 is provided with the magnet 11 attached to the arm 7A of the driver 7 and the substrate storage. A space facing the substrate 16 accommodated in the portion 2B is formed. As shown in FIGS. 1 and 2, the position between the lock member 6 and the substrate 16 (the opening of the magnet housing portion 7d of the arm 7A is opposed to the magnet housing portion 7d to prevent the magnet 11 from falling off from the magnet housing portion 7d). The resin cover 21 is disposed at the position where the communication portion 2C is closed, and the fall of the magnet 11 from the magnet storage portion 7d is prevented.

  Here, as shown in FIG. 3, the cover 21 is composed of a horizontal base portion 21A and a shielding portion 21B that stands vertically from the base portion 21A. An arc-shaped notch 21a for avoiding interference is formed, and a convex portion 21b for pressing the end of the output shaft 14a of the electric motor 14 is integrally formed.

  Further, a bag-like recess 21c that allows the horizontal arm 7A of the driver 7 to move up and down is formed in the shielding part 21B of the cover 21, and the tip of the arm 7A and the arm 7A are formed in the recess 21c. The magnet 11 housed in the magnet housing portion 7d is inserted.

  Thus, the cover 21 is fitted with a pair of cover insertion grooves 3h formed on opposite sides of the shielding part 21B so as to face the case 3 shown in FIG. 6, and the base part 21A is formed on the lid 4. By being placed on the cover pressing portion 4B, it is disposed between the lock member 6 and the substrate 16 as shown in FIGS.

  By the way, in the present embodiment, the spring member 22 is fitted and held in the recess 21 c of the cover 21. The spring member 22 is made of a non-magnetic material such as stainless steel, and is formed into a bifurcated shape (substantially U-shaped) with an upper opening as shown in FIG. A pair of chevron-shaped engaging projections 22a facing each other is formed. Here, the distance between the pair of engaging projections 22a is set to be smaller than the width dimension of the arm 7A formed on the driver 7.

  Next, the operation (lock / unlock operation) of the electric steering lock device 1 configured as described above will be described with reference to FIGS.

  In a state where the engine (not shown) is stopped, as shown in FIG. 1, the lock bolt 8 of the lock member 6 is at the upper limit lock position, and the upper end portion thereof is recessed from the lock bolt insertion hole 3d of the case 3 to the recess 3a. The steering shaft is locked by being engaged with a steering shaft (not shown), and the steering wheel (not shown) cannot be rotated in this locked state. Is prevented. At this time, the magnet 11 accommodated in the arm 7 </ b> A is positioned in the vicinity of the upper first hall element 17 provided on the substrate 16.

  When the driver turns on an unillustrated engine start switch from the above state, the ECU detects this and transmits an unlock signal to the electric steering lock device 1. Then, the control part provided in the board | substrate 16 of the electric steering lock apparatus 1 supplies electric power to the electric motor 14, and starts this.

  When the electric motor 14 is started as described above, the rotation of the output shaft 14a is decelerated by the worm 15 and the worm gear 12a, the direction is changed to a right angle and transmitted to the gear member 12, and the gear member 12 is rotated. Therefore, the driver 7 in which the male screw portion 7 a that is screwed into the female screw portion 12 b formed on the inner periphery of the gear member 12 is moved downward against the biasing force of the spring 13. When the driver 7 moves down in this way, the lock bolt 8 connected to the driver 7 by the arm 7A and the pin 9 formed integrally with the driver 7 moves down.

  As described above, when the arm 7A of the driver 7 moves downward, the arm 7A engages with the engagement protrusion 22a of the spring member 22, and thus a force that restricts the downward movement acts on the arm 7A. Since the restricting force (restraint force) is smaller than the operating force applied to the arm 7A by the electric motor 14, the arm 7A elastically deforms the spring member 22 so as to push open the engaging convex portion 22a, and the engaging convex It can move over the part 22a from the position shown by the solid line in FIG. 5 to the chain line position.

  Thus, when the arm 7A of the driver 7 moves down as described above and the lock bolt 8 reaches the lower limit unlock position as shown in FIG. 2, the upper end of the lock bolt 8 becomes the lock bolt of the case 3. Since the lock bolt 8 is retracted into the insertion hole 3d, the engagement of the lock bolt 8 with the steering shaft is released, the steering shaft is unlocked and unlocked, and the steering wheel can be rotated by the driver.

  When the arm 7A of the driver 7 moves down, the magnet 11 accommodated at the tip thereof approaches the second hall element 18 below the substrate 16 as shown in FIG. The magnetic force of the magnet 11 is detected. As a result, it is detected that the lock bolt 8 has moved to the unlock position, and the control unit of the substrate 16 stops driving the electric motor 14 and transmits an unlock completion signal to the ECU on the vehicle body side. The unlocked state shown is maintained, and the vehicle can travel.

  Thus, as shown in FIG. 2, when the lock member 6 is in the unlocked position, the arm 7A of the driver 7 is engaged with the engagement convex portion 22a of the spring member 22, so that the lock member 6 is locked. The lock member 6 can be held in the unlocked position with a simple configuration in which the movement to the position is prevented and only the spring member 22 is provided, and the lock bolt 8 of the lock member 6 in the unlocked position is moved when the vehicle is running. The occurrence of a problem that the steering wheel is unexpectedly moved to the lock position due to vibration of the vehicle and the steering wheel is locked is reliably prevented, and high safety of the vehicle is ensured.

  When the vehicle stops and the driver turns off the engine start switch to turn off the engine, the ECU detects this and transmits a lock signal to the electric steering lock device 1. Then, the control part provided in the board | substrate 16 of the electric steering lock apparatus 1 energizes the electric motor 14, and reversely rotates the output shaft 14a of the electric motor 14.

  As described above, when the output shaft 14a of the electric motor 14 is reversed, the rotation is transmitted to the gear member 12 via the worm 15 and the worm gear 12a, and the driver 7 is moved up because the gear member 12 is reversed. The lock bolt 8 connected to the driver 7 by the arm 7A and the pin 9 formed integrally with the driver 7 moves up.

  As described above, when the arm 7A of the driver 7 moves upward, the arm 7A engages with the engagement protrusion 22a of the spring member 22, and thus a force that restricts the upward movement acts on the arm 7A. Since the restricting force (restraint force) is smaller than the operating force applied to the arm 7A by the electric motor 14 (the operating force is larger than the restricting force), the arm 7A causes the spring member 22 to engage with the engaging convex portion 22a. Can be elastically deformed to a position where the engagement with the arm 7A is released, can move over the engagement convex portion 22a, and move from the position indicated by the chain line in FIG. 5 to the solid line position.

  Thus, when the arm 7A of the driver 7 moves up as described above and the lock bolt 8 reaches the upper limit lock position as shown in FIG. 1, the upper end of the lock bolt 8 engages with the steering shaft. Therefore, the steering shaft is locked and the vehicle is stolen during parking. If the engagement of the lock bolt 8 with the engagement groove of the steering shaft is not performed satisfactorily, the pin 9 can move within the long hole 8a formed in the lock bolt 8. Since the lock bolt 8 moves downward against the urging force of the spring 10, an excessive load does not act on the lock bolt 8.

  When the arm 7A of the driver 7 moves up, the magnet 11 accommodated at the tip of the arm 7A approaches the first hall element 17 above the substrate 16 as shown in FIG. A magnetic force 11 of the magnet is detected. As a result, it is detected that the lock bolt 8 has moved to the lock position, and the control unit of the substrate 16 stops driving the electric motor 14 and transmits a lock completion signal to the ECU on the vehicle body side. State is maintained. In the present embodiment, the first and second Hall elements 17 and 18 are not provided at the positions facing the magnet 11 at the locked position and the unlocked position, and are slightly deviated from the locked position and the unlocked position. The two Hall elements 17 and 18 simultaneously detect the magnetic force of the magnet 11 when the magnet 11 reaches the locked position or the unlocked position by separating the Hall elements 17 and 18 by a predetermined distance or more. This is to prevent the occurrence of a malfunction.

  Thus, according to the electric steering lock device 1 according to the present invention, the movement of the lock member 6 in the unlocked position to the lock position is prevented by the spring member 22, so that the lock member 6 can be configured with a simple configuration. The lock bolt 8 of the lock member 6 in the unlock position can be held in the unlock position, and the trouble that the steering is locked due to the sudden movement of the lock bolt 8 of the lock member 6 to the lock position due to vibration during traveling of the vehicle is ensured. Therefore, high safety is ensured for the vehicle. When it is necessary to lock the steering wheel when the vehicle is parked or the like, the electric motor 14 is driven and the lock member 6 is driven to the lock member 6 from the unlock position to the lock position by a predetermined value or more (the lock member 6 by the spring member 22). Since the operating force greater than the restraining force is applied and the spring member 22 is elastically deformed to the position where the engagement with the arm 7A formed on the driver 7 is released, the lock bolt 8 moves to the lock position and the steering is performed. Securely lock the rotation of the shaft to prevent the vehicle from being stolen.

  In this embodiment, since the arm 7A of the driver 7 provided with the magnet 11 of the operating position detection mechanism is an engaging portion that engages with the spring member 22, the engaging portion and the engaging portion move. There is no need to provide a separate space, and the cost and size of the electric steering lock device 1 can be reduced by reducing the number of parts and saving space.

  Furthermore, in the present embodiment, since the spring member 22 is made of a nonmagnetic material such as stainless steel, even if a configuration in which the arm (engagement portion) 7A that holds the magnet 11 is engaged with the spring member 22 is adopted, the spring The member 22 does not affect the magnetism of the magnet 11, and the position of the lock member 6 (arm 7A) by the operating position detection mechanism can always be accurately detected. By this detection, the electric motor 14 is driven and controlled. The steering member can be locked / unlocked by reliably moving the lock member 6 (lock bolt 8) to the lock position / unlock position.

  In addition, according to the present embodiment, the following effects can be obtained.

  That is, in the present embodiment, the cover 21 closes the communication portion 2 </ b> C that forms the facing space between the magnet 11 and the substrate 16 by communicating the lock member storage portion 2 </ b> A and the substrate storage portion 2 </ b> B formed in the housing 2. The grease applied to the worm 15 and the worm gear 12a constituting the drive mechanism does not scatter to the substrate 16 through the communication portion 2C, and the cover 21 is made of a non-magnetic resin. Even if it is interposed between the magnet 11 and the Hall elements 17 and 18, the magnetic detection of the magnet 11 by the Hall elements 17 and 18 will not be hindered. And since the cover 21 is arrange | positioned in the position which prevents the fall of the magnet 11 from the locking member 6 (arm 7A), the magnet 11 falls off from the locking member 6 (arm 7A) also by the vibration at the time of vehicle travel. There is no.

  As described above, since the grease is prevented from being scattered on the substrate 16, the electrical malfunction of the substrate 16 is solved, and the magnet 11 is prevented from falling off from the lock member 6 (arm 7 </ b> A). Therefore, the position (lock / unlock position) of the lock member 6 (magnet 11) can always be accurately detected.

  Further, since the cover 21 for preventing the grease from being scattered on the substrate 16 is also used for preventing the magnet 11 from falling off, a simple fixing means (for example, a means for fixing the magnet 11 to the magnet storage portion 7d of the arm 7A) It is possible to employ only press-fitting or insertion by applying an adhesive or a pressure-sensitive adhesive, and the effect that the number of parts and the manufacturing cost can be reduced by omitting a dedicated fixing member.

DESCRIPTION OF SYMBOLS 1 Electric steering lock device 2 Housing 2A Housing lock member storage portion 2B Housing substrate storage portion 2C Housing communication portion 3 Case 3a Case recess 3b Case connector placement portion 3c Case pin hole 3d Case lock bolt insertion hole 3e Case engagement groove 3f Case bearing recess 3g Case substrate holding groove 3h Case cover insertion groove 4 Lid 4A Lid pinning part 4B Lid cover pressing part 4C Lid gear holding cylinder 4a Lid pin insertion hole 4b Lid spring receiver 5 Pin 6 Lock member 7 Driver 7A Driver arm 7B Driver rotation stop 7a Driver male thread 7b Driver pin insertion hole 7c Driver partition 7d Arm magnet housing 8 Lock bolt 8a Lock bolt Long hole Pin 10 spring 11 magnet 12 gear member 12a worm 12b gear member of the female screw portion 13 spring 14 electric motor 14a motor output shaft 15 worm 16 substrate 17 first Hall element (magnetic detection element)
18 Second Hall element (magnetic detection element)
DESCRIPTION OF SYMBOLS 19 Connector 20 Motor power supply terminal 21 Cover 21A Cover base part 21B Cover shielding part 21a Cover cutout 21b Cover convex part 21c Cover concave part 22 Spring member 22a Engaging convex part of spring member

Claims (3)

A lock member movable between a lock position that engages with a steering shaft of a vehicle and an unlock position that releases the engagement;
An electric motor for operating the locking member;
A drive mechanism for converting the rotational force of the output shaft of the electric motor into the advance / retreat force of the lock member;
In the electric steering lock device with
Engaging with an engaging portion provided on the locking member to prevent the locking member from moving from the unlocked position to the locked position, and to act on the locking member at a predetermined value or more from the unlocked position toward the locked position. An electric steering lock device comprising a spring member that can be elastically deformed to a position where engagement with an engagement portion formed on the lock member is released when is added. An operation position detection mechanism configured to detect an operation position of the lock member by using a magnet provided on the lock member and a magnetic detection element capable of detecting the magnetic force of the magnet,
The electric steering lock device according to claim 1, wherein the magnet is housed in an end portion, and an arm projecting from the lock member toward the magnetic detection element is used as the engagement portion of the lock member. 3. The electric steering lock device according to claim 1, wherein the spring member is made of a nonmagnetic material.

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