JP6889526B2 - Electric steering lock device - Google Patents

Description

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

In recent years, some vehicles are equipped with an electric steering lock device for electrically locking the rotation of the steering wheel when parking for the purpose of preventing theft. This electric steering lock device detects, for example, when the driver turns off the engine start switch while the engine is operating, drives the electric motor, and the electric motor moves the lock member to engage with the steering shaft. This locks the rotation of the steering wheel, 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 move the lock member. The engagement with the steering shaft is released, and the steering wheel is unlocked to enable steering operation.

By the way, in order to electrically lock / unlock the steering wheel in such an electric steering lock device, it is necessary to detect whether or not the lock member is in the lock position or the unlock position and drive and control the electric motor. For that purpose, a position detection mechanism for the lock member is provided. As this position detection mechanism, for example, a magnet is attached to a lock member or an interlocking member that moves the lock member, and magnetic sensors such as Hall elements are arranged at locations corresponding to the lock position and the unlock position, and these magnetic sensors are provided. By detecting the magnetic force of the magnet, it is used to detect whether the lock member is in the locked position or the unlocked position.

Here, as a means for fixing the magnet, for example, the one shown in FIG. 9 is disclosed in Patent Document 1.

That is, FIG. 9 is an exploded perspective view of the slider and the lock member of the electric steering lock device proposed in Patent Document 1, and the illustrated slider 18 is not shown and is rotationally driven by an electric motor (not shown) which is a drive source. It is a member that reciprocates the lock member 19 between the lock position and the unlock position by screwing and inserting it into the screw shaft of the above. The slider 18 is composed of a screwing member 50 screwed to a screw shaft and a magnet holding member 51 covering the screwing member 50, and a pair of magnets (magnets) 20 are housed and held in the magnet holding member 51.

Specifically, the magnet holding member 51 is formed with a pair of magnet accommodating recesses 60 that open on the side surface, and each magnet 20 is accommodated in these magnet accommodating recesses 60. It is held and prevented from falling off from each magnet accommodating portion 60. Here, each holder 61 is formed in a substantially U shape by a paramagnetic material such as a copper alloy, and rectangular engaging holes 62 are formed on both side portions thereof.

Therefore, after each magnet 20 is housed in each magnet accommodating portion 60 of the magnet holding member 51, each holder 61 is fitted to the magnet holding member 51 so as to cover each magnet 20, and both sides of each holder 61 are fitted. The engaging holes 62 formed in the portions are engaged with the engaging protrusions 63 projecting from both side portions (the portions corresponding to the engaging holes 62 of each holder 61) of the magnet holding member 51. Then, each holder 61 is attached to the magnet holding member 51, and each magnet 20 is held by each holder 61 to prevent the magnet 20 from falling off from the magnet holding member 51.

Japanese Unexamined Patent Publication No. 2012-126354

However, in the configuration shown in FIG. 9 disclosed in Patent Document 1, since the holder 61 is required to hold each magnet 20, there is a problem that the number of parts and the assembling man-hours increase by that amount, which leads to an increase in cost. is there.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric steering lock device capable of easily and surely attaching a magnet with one touch without increasing the number of parts and assembling man-hours. To provide.

In order to achieve the above object, the invention according to claim 1 is
A locking member that can move between the locking position that engages the steering shaft of the vehicle and the unlocking position that disengages the engagement.
An electric motor that operates the lock member and
A gear member that converts the rotational force of the output shaft of the electric motor into the advancing / retreating force of the lock member, and
The magnet housed in the gear member and
A magnetic sensor that detects the magnetic force of the magnet and
The electric steering lock device provided with,
Characterized in that said gear member includes a magnet holding portion for accommodating the magnet, the magnet holding portion, when accommodating the magnet having, after elastic deformation, the elastic claw for holding the magnet in the shape recovery And.

According to a second aspect of the invention, in the invention according to the first aspect, wherein the gear member is a rotating member, has a concentric mounting arrangement hole around the rotation axis to the magnetic sensor side, before Symbol magnet holding portion, the formed adjacent the radially outer side of the mounting arrangement hole, presents a groove that pass spatial communication with said mounting arrangement hole, the elastic claw is located in the magnetic sensor side of the magnet and characterized that you from opposite the mounting arrangement hole in the magnet holding portion protrudes toward the mounting arrangement hole.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the magnet includes a main body portion and a pair of overhanging portions integrally projecting from the main body portion.
Wherein the elastic claw of the magnet holding portion is provided a pair so as to respectively engage the magnetic sensor side of the pair of overhang portions positioned in the projecting portion,
Said portion from between the pair of elastic pawls of the main portion of the magnet is characterized by being exposed to the magnetic sensor side.

Invention of claim 4, in the invention of claim 3, wherein the elastic claw is provided with elastically deformable arms that protrude parallel to the bottom surface of the magnet holding portion, is formed at the tip of the arm characterized in that it consists of a pawl portion engaged with the protruding portion of the magnet housed in the magnet holder.

According to the invention of claim 1, wherein, when receiving the magnet to the magnet holding portion formed in the gear member, a magnet elastic claw formed integrally with the gear member is engaged with the end edge of the magnet fixing However, in order to prevent the gear member from falling off, a separate part for preventing the magnet from falling off becomes unnecessary, and the number of parts is reduced. Further, since the magnet can be easily and surely assembled to the gear member by simply pushing the magnet into the magnet holding portion of the gear member, the assembly man-hours are reduced and the number of parts is reduced. The cost of the electric steering lock device can be reduced.

According to the second aspect of the present invention, a centrifugal force acting radially outward (from the center of rotation of the gear member to the outside) due to the rotation of the gear member acts on the magnet assembled in the magnet holding portion of the rotating gear member. To do. Here, the magnet holding portion of the gear member has a groove shape communicating with the mounting placement hole, and the elastic claw protrudes from the opposite side of the mounting placement hole in the magnet holding portion toward the mounting placement hole, so that the centrifugal force acts on the magnet. The magnet is prevented from falling off from the magnet holding portion due to force, and the magnet is surely prevented from falling off from the gear member in combination with the locking of the elastic claw.

According to the inventions of claims 3 and 4, the magnet can be assembled in a state where a part of the main body thereof is exposed from the magnetic sensor side opening of the gear member to the magnetic sensor side. Therefore, the magnetic sensor of the magnet. Because the magnetic force of the magnet is reliably detected by the magnetic sensor and the position of the lock member (lock / unlock position) is accurately detected without blocking the magnetic flux to the magnet, and a small magnet can be used. It is possible to realize cost reduction and weight reduction. The magnet can be easily and surely assembled to the gear member with one touch by engaging the pair of elastic claws with the pair of overhanging portions.

It is an exploded perspective view of the electric steering lock device which concerns on this invention. It is a vertical sectional view of the electric steering lock device which concerns on this invention. It is a perspective view of the drive mechanism of the electric steering lock device which concerns on this invention. It is a perspective view which shows the state before assembling the magnet to the gear member of the electric steering lock device which concerns on this invention. It is a perspective view which shows the state after assembling a magnet to the gear member of the electric steering lock device which concerns on this invention. (A) to (c) are partial cross-sectional views showing a procedure for assembling a magnet to a gear member of the electric steering lock device according to the present invention in the order of the steps. It is a top view which shows the locked state of the drive mechanism of the electric steering lock device which concerns on this invention. It is a top view which shows the unlocked state of the drive mechanism of the electric steering lock device which concerns on this invention. It is an exploded perspective view of the slider and the lock member of the electric steering lock device proposed in Patent Document 1.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of the electric steering lock device according to the present invention, FIG. 2 is a vertical sectional view showing a locked state of the electric steering lock device, and FIG. 3 is a perspective view of a drive mechanism of the electric steering lock device. Is a perspective view showing a state before assembling the magnet to the gear member of the electric steering lock device, and FIG. 5 is a perspective view showing a state after assembling the magnet to the gear member of the electric steering lock device, FIG. 6A. ~ (C) is a partial cross-sectional view showing the procedure for assembling the magnet to the gear member of the electric steering lock device in the order of the steps, FIG. 7 is a plan view showing the locked state of the drive mechanism of the electric steering lock device, and FIG. 8 is the same. It is a top view which shows the unlocked state of the drive mechanism of an electric steering lock device.

(Configuration of electric steering device)
The electric steering lock device 1 according to the present invention locks / unlocks the rotation of a steering shaft (steering wheel) (not shown) of the vehicle by electric power, and as shown in FIGS. 1 and 2, the case 2 and the electric steering lock device 1 In the space defined by the cover 3 assembled on the upper part, the printed substrate 4, the gear cover 5, the gear member 6 which is an interlocking member, the lock bolt 7 which is a lock member, the electric motor 8 which is a drive source, and the like are placed. It is housed and configured. As shown in FIG. 1, engagement protrusions 2a are formed at a plurality of locations on the outer periphery of the case 2, and the cover 3 has a plurality of locations around the engagement projections 2a (locations corresponding to the engagement projections 2a of the case 2). ) Is engaged with the engaging protrusion 2a projecting from the case 2 so as to be assembled to the upper part of the case 2 as shown in FIG.

The case 2 and the cover 3 are made of a non-magnetic metal such as a magnesium alloy, and an arc-shaped recess 2b is formed in the lower portion of the case 2. A column tube (not shown) is fitted into the recess 2b, and the column tube is fixed to the case 2 by an arc-shaped bracket (not shown) attached to the case 2. Although not shown, a steering shaft is inserted into the column tube, a steering wheel is attached to the upper end of the steering shaft, and the lower end of the steering shaft is connected to the steering gear box. Then, 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, and the front wheels of the vehicle are steered to perform the required steering.

Further, as shown in FIG. 1, a cylindrical shaft portion 2A (see FIG. 2) and a cylindrical gear storage cylinder 2B arranged on the outer circumference thereof are coaxially erected on the inner surface (upper surface) of the case 2. A guide cylinder 2E is provided between the shaft 2A and the gear storage cylinder 2B to prevent the gear member 6 from tilting. Further, a part of the side surface of the gear storage cylinder 2B is open so that the worm 13 of the electric motor 8 described later can advance. A rectangular frame-shaped motor storage portion 2C having an open upper surface is integrally formed adjacent to the gear storage cylinder 2B. Further, a through hole 2D having a rectangular cross section communicating with the recess 2b is provided on the side of the motor storage portion 2C of the case 2 and adjacent to the outer circumference of the gear storage cylinder 2B. A guide groove 2F is formed between the 2D and the gear storage cylinder 2B so that the engaging portion 7a projecting from the engaging member 7A of the lock bolt 7, which will be described later, is guided in the sliding direction. As described above, the lock bolt 7 is fitted so as to be movable up and down.

By the way, the gear member 6 and the electric motor 8 form a drive mechanism for linearly moving (vertically moving) the lock bolt 7 between the locked position and the unlocked position.

The gear member 6 is a rotating member made of resin, and as shown in FIG. 2, by storing the gear member 6 in the gear storage cylinder 2B of the case 2, the drive guide groove 6F formed on the bottom surface guides the gear member 6. It is fitted to the tubular portion 2E. Then, after passing the shaft portion 2A of the case 2 through the shaft support hole 6a formed through the center thereof, the screw 10 to be inserted into the washer 9 is screwed into the shaft portion 2A of the case 2, so that the gear member 6 becomes the case. It is guided without tilting with respect to 2, is supported rotatably, and is prevented from coming off from the case 2.

Then, as shown in detail in FIG. 3, an inclined spiral cam 6C is formed in the upper half portion of the gear member 6, and the upper end portion of the spiral cam 6C is continuously connected to the bottom surface portion of the gear member 6. An unlock holding portion 6A which is a horizontal plane (a plane orthogonal to the rotation axis of the gear member 6) provided at a high position and a lower end portion of the spiral cam 6C are continuously provided at a position lower than the bottom surface portion of the gear member 6. Lock holding portions 6B, which are horizontal surfaces, are provided in the circumferential direction, and these unlock holding portions 6A and lock holding portions 6B are connected by a spiral cam 6C that is spirally inclined in the rotation axis direction and are continuous. It constitutes a spiral cam that changes dynamically.

Here, a block-shaped engaging member 7A, which is a separate member, is connected to the upper end of the lock bolt 7, and the engaging member 7A is provided with an engaging portion 7a projecting in a right-angled direction. It is provided. That is, as shown in FIG. 2, since the lock bolt 7 is constantly urged in the locking direction (lower part of FIG. 2) by the spring 11 compressed between the lock bolt 7 and the cover 3, the engaging portion 7a will be described later. As the gear member 6 rotates as described above, it engages with any of the unlock holding portion 6A, the lock holding portion 6B, and the spiral cam 6C of the gear member 6 and operates at the locked position or the unlocked position. It is composed. The engaging portion 7a is formed so as not to overlap the magnet holding portion 6D described later.

A worm wheel 12 is integrally formed in the lower half of the gear member 6, and the worm wheel 12 has an output shaft (motor shaft) extending from the electric motor 8 in a state of being assembled to the case 2. The small-diameter worm 13 bound to 8a is engaged. Here, the electric motor 8 is housed in the motor storage portion 2C formed in the case 2, and the output shaft 8a is held in a shaft holding groove (not shown) whose base end portion is formed in the motor storage portion 2c. , The tip portion is rotatably held by a shaft holding portion (not shown) formed in the case 2. The worm 13 of the output shaft 8a meshes with the worm wheel 12 of the gear member 6 in the gear storage cylinder 2B. As a result, when the electric motor 8 is activated and the output shaft 8a rotates, the rotation is transmitted to the gear member 6 via the worm 13 and the worm wheel 12, so that the gear member 6 is transferred to the shaft portion 2A of the case 2 (FIG. 2) It rotates around the center.

Therefore, in the present embodiment, as shown in FIG. 3, the magnet 14 is housed and held in the unlock holding portion 6A of the gear member 6. That is, as shown in FIGS. 2 and 4, a rectangular magnet holding portion 6D for accommodating the magnet 14 is formed in a part of the unlock holding portion 6A of the gear member 6, and the magnet holding portion 6D is formed. On both sides of the 6D, a pair of elastic claws 6E for engaging with the magnet 14 housed in the magnet holding portion 6D and preventing the magnet 14 from falling off from the magnet holding portion 6D are integrally formed. Here, as shown in FIG. 6, a wedge-shaped claw portion 6e is integrally formed at the tip end portion of each elastic claw 6E.

By the way, as shown in FIGS. 2 and 4, in the center of the upper half of the gear member 6, a mounting arrangement hole 6b having a diameter larger than that of the shaft support hole 6a is provided around the center of the rotation axis of the gear member 6. It is formed coaxially with the hole 6a. The magnet holding portion 6D has a depth similar to the height of the magnet 14 described later on the bottom surface side of the mounting arrangement hole 6b, and opens toward the center of the rotation axis of the gear member 6. A mounting flat surface portion 6G is formed on the magnet holding portion 6D, and the pair of elastic claws 6E are parallel to the mounting flat surface portion 6G from the upper end edge of the magnet holding portion 6D toward the mounting arrangement hole 6b , respectively. It has been extended. As a result, a mounting opening 6c into which the magnet 14 can be inserted is formed between the elastic claw 6E and the mounting flat surface portion 6G. The mounting arrangement hole 6b is for arranging the magnet 14 so as to be inserted into the magnet holding portion 6D.

Here, as shown in FIG. 4, the magnet 14 includes a main body portion 14a and a pair of overhanging portions 14b that integrally project from the main body portion 14a to the left and right, and a pair of elastic claws of the gear member 6. A magnetic sensor side opening 6d is formed between the 6Es to expose a part of the main body portion 14a of the magnet 14 toward the upper side (the back surface side of the printed circuit board 4).

Here, the procedure for assembling the magnet 14 to the gear member 6 will be described.

In order to assemble the magnet 14 to the gear member 6, first, as shown in FIG. 6A, the magnet 14 is arranged in the mounting arrangement hole 6b of the gear member 6 and slid from the mounting flat surface portion 6G. The magnet 14 is pushed into the magnet holding portion 6D from the mounting arrangement hole 6b side in the direction of the arrow shown in the drawing.

Then, as shown in FIG. 6B, the pair of left and right overhanging portions 14b of the magnet 14 abut on the claw portions 6e of the pair of elastic claws 6E to bend each elastic claw 6E upward, so that the magnet 14 Is allowed to be pushed into the magnet holding portion 6D. Then, as shown in FIG. 6C, when the magnet 14 is pushed to the back side of the magnet holding portion 6D of the gear member 6 and the magnet 14 passes through the claw portions 6e of the left and right elastic claws 6E, each elastic claw 6E returns to its original state by its own elastic restoring force, and its claw portion 6e engages with the edge portion of each overhanging portion 14b of the magnet 14, so that the magnet 14 has a mounting plane as shown in FIG. It is securely fixed and held in the magnet holding portion 6D of the gear member 6 in a state of being sandwiched between the portion 6G and the elastic claw 6E, and is prevented from falling off from the magnet holding portion 6D.

By the way, as shown in FIG. 2, the gear member 6 is covered from above by the gear cover 5, and the gear cover 5 is for preventing the grease applied to the gear member 6 from being scattered on the printed circuit board 4. It is configured to cover a part of the gear member 6, the electric motor 8, the output shaft 8a, and the worm 13. Further, the gear cover 5 is formed with a notched circular through hole 5a (see FIG. 1) so as not to block the magnetic force of the magnet 14. That is, the magnet 14 is configured to rotate on the inner peripheral side of the through hole 5a.

Then, as shown in FIG. 2, the printed circuit board 4 is horizontally mounted above the gear cover 5 of the case 2. A power supply connector 15 exposed from the case 2 and connected to an external control device is attached to one end of the printed circuit board 4. Further, as shown in FIGS. 7 and 8, one locking magnetic sensor 16 and two unlocking magnetic sensors 17 are mounted at predetermined positions (locked position and unlocked position) on the back surface of the printed circuit board 4, respectively. Has been done. A substantially rectangular through hole 4a for allowing the lock bolt 7 to pass through is formed in the printed circuit board 4 (see FIG. 1), and the lock bolt 7 is connected to the cover 3 through the through hole 4a. By engaging with the spring 11 arranged between the two, the case 2 is urged to protrude from the through hole 2D. In the present embodiment, Hall ICs are used for the locking magnetic sensor 16 and the unlocking magnetic sensor 17, and the locking magnetic sensor 16, the unlocking magnetic sensor 17, and the gear member 6 are used. The housed and held magnet 14 constitutes a position detection mechanism for detecting the position (lock / unlock position) of the lock bolt 7. Further, the locking magnetic sensor 16 and the unlocking magnetic sensor 17 are also arranged so as to be located on the inner peripheral side of the through hole 5a of the gear cover 5.

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

As shown in FIG. 2, when the lock bolt 7 is located at the lower limit (lock position) and protrudes into the recess 2b of the case 2, the lock bolt 7 engages with the engagement groove of the steering shaft (not shown). Therefore, the rotation of the steering shaft (steering wheel) is locked, and the steering operation by the driver becomes impossible, so that the theft of the vehicle is prevented.

In the steering lock state, as shown in FIG. 7, the engaging portion 7a of the lock bolt 7 is engaged with the lock holding portion 6B of the gear member 6, and the magnet 14 assembled to the gear member 6 is , Facing the locking magnetic sensor 16 of the printed substrate 4. Therefore, the magnetic field of the magnet 14 is detected by the locking magnetic sensor 16, thereby detecting that the lock bolt 7 is in the locked position.

Next, when the driver turns on the engine start switch (not shown) in order to drive the vehicle, the controller (microcomputer) (not shown) in the vehicle starts supplying power to the electric motor 8 and starts the electric motor 8. To do. Then, the rotation of the output shaft 8a of the electric motor 8 is transmitted to the gear member 6 via the worm 13 and the worm wheel 12, so that the gear member 6 rotates around the shaft portion 2A of the case 2.

Here, since the lock bolt 7 is constantly urged in the locking direction (lower part of FIG. 2) by the spring 11, when the gear member 6 rotates as described above, the engaging portion 7a of the lock bolt 7 engages. The matching position shifts from the lock holding portion 6B of the gear member 6 to the unlock holding portion 6A provided at a high position from the bottom surface portion via the spiral cam 6C. Then, the lock bolt 7 moves upward from the lock position shown in FIG. 2 and moves to the unlock position, disengages from the engagement groove of the steering shaft (not shown), and the engagement between the two is released. As a result, the steering shaft (steering wheel) is unlocked and unlocked, and the driver can operate the steering wheel.

Then, in the unlocked state, as shown in FIG. 8, the magnet 14 assembled to the gear member 6 faces the unlocking magnetic sensor 17 of the printed substrate 4, and the magnetic force of the magnet 14 is applied by the unlocking magnetic sensor 17. Since it is detected, it is detected that the lock bolt 7 is in the unlocked position. Then, the detection signal from the unlocking magnetic sensor 17 is transmitted to a controller (not shown), and the lock bolt 7 is held at the unlocked position because the controller cuts off the power supply to the electric motor 8.

Then, when the vehicle stops and the driver turns off the engine start switch to turn off the engine, the controller detects this and sends a lock signal to the electric steering lock device 1 to supply power to the electric motor 8. To start. Then, the electric motor 8 is activated, the rotation of the output shaft 8a is transmitted to the gear member 6 via the worm 13 and the worm wheel 12, and the gear member 6 rotates around the shaft portion 2A of the case 2. Then, the engaging position of the engaging portion 7a of the lock bolt 7 shifts from the unlocking holding portion 6A of the gear member 6 to the lock holding portion 6B provided at a lower position from the bottom surface portion via the spiral cam 6C. The lock bolt 7 moves downward from the unlocked position to the locked position. As a result, as shown in FIG. 2, the lock bolt 7 protrudes from the recess 2b of the case 2 and engages with the engagement groove of the steering shaft (not shown), so that the steering shaft (steering wheel) is locked and the driver steers. The operation becomes impossible.

Then, in the locked state, as shown in FIG. 7, the magnet 14 assembled to the gear member 6 faces the locking magnetic sensor 16 of the printed substrate 4, and the magnetic force of the magnet 14 is detected by the locking magnetic sensor 16. Therefore, it is detected that the lock bolt 6 is in the locked position. Then, the detection signal from the locking magnetic sensor 16 is transmitted to a controller (not shown), and the lock bolt 7 is held at the locked position because the controller cuts off the power supply to the electric motor 8.

Thus, in the electric steering lock device 1 according to the present invention, if the magnet 14 is housed in the magnet holding portion 6D formed in the gear member 6, a pair of elastic claws integrally formed in the gear member 6 are formed. 6E engages with the edge of the pair of left and right overhanging portions 14b of the magnet 14 to prevent the magnet 14 from moving in the radial direction, and is fixed between the elastic claw 6E and the magnet holding portion 6D (FIG. 6 (c)), the magnet 14 is prevented from falling off from the gear member 6. As a result, a separate component for preventing the magnet 14 from falling off becomes unnecessary, and the effect of reducing the number of components can be obtained. Further, since the magnet 14 can be easily and surely assembled to the gear member 6 with one touch simply by pushing the magnet 14 into the magnet holding portion 6D of the gear member 6, the assembling man-hours are reduced and the number of parts is reduced. Together with this, the cost of the electric steering lock device 1 can be reduced.

By the way, in the electric steering lock device 1 according to the present invention, the magnet 14 assembled in the magnet holding portion 6D of the rotating gear member 6 is radially outward (rotation of the gear member 6) due to the rotation of the gear member 6. Centrifugal force acts from the center to the outside). Here, in the present embodiment, the mounting opening 6c formed in the magnet holding portion 6D of the gear member 6 opens toward the rotation center of the gear member 6 on the side opposite to the direction in which the centrifugal force acts. Therefore, the centrifugal force acting on the magnet 14 prevents the magnet 14 from falling off from the mounting opening 6c, and together with the locking of the elastic claw 6E, the magnet 14 falls off from the gear member 6. Is surely prevented.

Further, even if a configuration in which the mounting opening 6c is opened in the magnet holding portion 6D of the gear member 6 toward the rotation center of the gear member 6 as in the present embodiment, the rotation shaft of the gear member 6 is adopted. Since the mounting arrangement hole 6b is coaxially formed around the center, the magnet 14 can be easily inserted into the magnet holding portion 6D from the mounting arrangement hole 6b and assembled to the magnet holding portion 6D.

Further, in the present embodiment , the magnet 14 can be assembled in a state where a part of the main body portion 14a is exposed from the magnetic sensor side opening 6d of the gear member 6 to the magnetic sensor 16 and 17 sides, so that the magnet 14 can be assembled. The magnetic flux to the locking magnetic sensor 16 and the unlocking magnetic sensor 17 is not blocked, and the magnetic force of the magnet 14 is reliably detected by these locking magnetic sensor 16 and the unlocking magnetic sensor 17, and the lock bolt The locked position and the unlocked position of No. 7 are accurately detected, and a small magnet 14 can be used, so that the effect of cost reduction and weight reduction can be obtained.

In the present embodiment, the gear member 6 having the worm wheel 12 and the spiral cam 6C is adopted as the interlocking member, but the present invention is not limited to this, and for example, instead of the spiral cam, a male A screw portion, a female screw portion, a spiral cam, or the like may be provided, and various changes can be made. Further, a gear may be provided instead of the worm wheel 12. Further, the interlocking member may be a spur tooth gear, a slide cam that moves forward and backward, a resin member integrally attached to the lock member, or the like.

Further, in the present embodiment, the Hall IC is adopted as the magnetic sensor, but the present invention is not limited to this, and for example, a Hall element, a magnetoresistive effect element, a magnetic impedance element, or the like may be used.

1 Electric steering lock device 2 Case 2A Case shaft 2B Case gear storage cylinder 2C Case motor storage 2D Case through hole 2a Case engagement protrusion 2b Case recess 3 Cover 3a Cover engagement hole 4 Printed circuit board 5 Gear cover 5a Through hole of gear cover 6 Gear member (interlocking member)
6A Unlock holding part of gear member 6B Lock holding part of gear member 6C Spiral cam of gear member 6D Magnet holding part of gear member 6E Elastic claw of gear member 6a Shaft support hole of gear member 6b Mounting arrangement hole of gear member 6c Gear Opening for mounting member 6d Opening on magnetic sensor side of gear member 6e Claw of elastic claw 7 Lock bolt (lock member)
7A Engaging member 7a Engaging member engaging part 8 Electric motor 8a Electric motor output shaft 9 Washer 10 Screw 11 Spring 12 Worm wheel 13 Warm 14 Magnet 14a Magnet body 14b Magnet overhang 15 Connector 16 For locking Magnetic sensor 17 Magnetic sensor for unlocking

Claims (4)

A locking member that can move between the locking position that engages the steering shaft of the vehicle and the unlocking position that disengages the engagement.
An electric motor that operates the lock member and
A gear member that converts the rotational force of the output shaft of the electric motor into the advancing / retreating force of the lock member, and
The magnet housed in the gear member and
A magnetic sensor for detecting a magnetic force of the magnet,
It is an electric steering lock device equipped with
The gear member includes a magnet holding portion for accommodating the magnet, and the magnet holding portion has an elastic claw that elastically deforms when accommodating the magnet and then returns to its shape to hold the magnet. Electric steering lock device. The gear member is a rotating member, and has concentric mounting arrangement holes centered on the rotation axis on the magnetic sensor side .
Before Symbol magnet holding portion, the formed adjacent the radially outer side of the mounting arrangement hole, presents a groove that pass spatial communication with said mounting arrangement hole,
The elastic claw is located in the magnetic sensor side of the magnet, an electric according to claim 1, wherein that you are projecting toward the mounting arrangement hole from opposite the mounting arrangement hole in the magnet holder Steering lock device. The magnet includes a main body portion and a pair of overhanging portions integrally projecting from the main body portion.
A pair of elastic claws of the magnet holding portion are provided so as to be located on the magnetic sensor side of the overhanging portion and to engage with the pair of overhanging portions.
The electric steering lock device according to claim 1 or 2, wherein a part of the main body of the magnet is exposed from between the pair of elastic claws to the magnetic sensor side. The elastic claws are on an elastically deformable arm that projects parallel to the bottom surface of the magnet holding portion and on the overhanging portion of the magnet that is formed at the tip of the arm and is housed in the magnet holding portion. The electric steering lock device according to claim 3, further comprising an engaging claw portion.

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