JP2022155039A - steering lock device - Google Patents

Abstract

To achieve downsizing of a steering lock device.SOLUTION: A steering lock device includes: a lock member 30 which may move between a lock position for limiting the rotation of a steering shaft and an unlock position for allowing the rotation of the steering shaft; a drive mechanism 40 which moves the lock member 30; an auxiliary lock member 50 which can move between an engagement position for engaging with the lock member 30 and a non-engagement position for not engaging with the lock member 30; a first spring 60 which biases the auxiliary lock member 50 from the non-engagement position to the engagement position; a transmission shaft 70 which restricts the auxiliary lock member 50 from being moved by biasing force of the first spring 60 while engaging with the auxiliary lock member 50, and moves the auxiliary lock member 50 between the engagement position and the non-engagement position; and a linkage part which moves the transmission shaft 70 so that its engagement with the auxiliary lock member 50 is released as the cover moves when the cover is removed from the housing.SELECTED DRAWING: Figure 4

Description

The present invention relates to a steering lock device.

Patent Documents 1 and 2 disclose a steering lock device for locking and unlocking a steering shaft of a vehicle. These steering lock devices include a lock member movable between a lock position for locking the steering shaft and an unlock position for unlocking the steering shaft.

The steering lock device of Patent Literature 1 includes a mechanism for holding a lock member in a locked position in the event of fraudulent activity such as theft. The steering lock device of Patent Document 2 includes a mechanism that holds the lock member at the unlocked position while the vehicle is running.

U.S. Pat. No. 7,121,126 JP-A-2002-283962

If the steering lock device has a mechanism that holds the lock member in the locked position when the vehicle is tampered with and a mechanism that holds the lock member in the unlocked position while the vehicle is running, the steering lock device becomes large. .

SUMMARY OF THE INVENTION An object of the present invention is to reduce the size of a steering lock device having a function of holding a lock member in a locked position and a function of holding a lock member in an unlocked position.

One aspect of the present invention is
a housing;
a cover coupled with the housing;
a locking member movable between a locked position that restricts rotation of the steering shaft and an unlocked position that allows rotation of the steering shaft;
a driving mechanism having a motor for moving the locking member;
an operating unit provided in the drive mechanism and operated by the driving force of the motor;
an auxiliary locking member movable between an engaging position where it engages with the locking member and a non-engaging position where it does not engage with the locking member;
a first spring that biases the auxiliary lock member from the non-engaged position toward the engaged position;
In the state of engagement with the auxiliary lock member, movement of the auxiliary lock member due to the biasing force of the first spring is regulated, and the auxiliary lock member is actuated in accordance with the operation of the operating portion to engage the auxiliary lock member. a transmission shaft for movement between an engaged position and the disengaged position;
When the cover is removed from the housing, the transmission shaft is disengaged from the auxiliary lock member as the cover is moved, whereby the biasing force of the first spring causes the transmission shaft to disengage from the auxiliary lock member. an interlocking part that allows movement of the auxiliary locking member from the non-engaging position toward the engaging position,
The lock member is
a first engaging portion aligned with the auxiliary locking member when in the locking position;
a second engaging portion aligned with the auxiliary locking member when in the unlocked position;
The auxiliary lock member holds the lock member at the lock position when engaged with the first engagement portion, and holds the lock member at the unlock position when engaged with the second engagement portion. A locking device is provided.

When the cover is removed from the housing by tampering or the like while the locking member is in the locked position, the transmission shaft moves out of engagement with the auxiliary locking member. Thereby, the auxiliary lock member is moved from the non-engagement position to the engagement position by the biasing force of the first spring, and engages with the first engagement portion of the lock member. As a result, even if the cover is removed from the housing by fraud or the like, the locking member is held in the locked position.

On the other hand, when the lock member moves from the lock position to the unlock position, the auxiliary lock member moves from the non-engagement position to the engagement position in conjunction with the drive mechanism, the operating section, and the transmission shaft. It engages with the second engaging portion. As a result, the lock member is held in the unlocked position.

According to this configuration, the auxiliary lock member has a function of holding the lock member in the locked position and a function of holding the lock member in the unlocked position. The steering lock device can be made smaller than when it is provided.

According to the present invention, it is possible to reduce the size of the steering lock device having the function of holding the lock member at the lock position and the function of holding the lock member at the unlock position.

1 is an exploded perspective view of a steering lock device according to a first embodiment of the present invention; FIG. 1 is a longitudinal sectional view of a steering lock device according to a first embodiment; FIG. 1 is a partial cross-sectional perspective view of a steering lock device according to a first embodiment; FIG. 4 is a perspective view showing the periphery of the drive mechanism according to the first embodiment; FIG. FIG. 4 is a side view showing the periphery of the drive mechanism in the locked state according to the first embodiment; Sectional drawing along the VI-VI line of FIG. The side view which shows the periphery of the drive mechanism in the middle of changing from a locked state to an unlocked state which concerns on 1st Embodiment. Sectional drawing along the VIII-VIII line of FIG. FIG. 4 is a side view showing the periphery of the drive mechanism in an unlocked state according to the first embodiment; FIG. 10 is a cross-sectional view taken along line XX of FIG. 9; FIG. 4 is a side view showing the periphery of the drive mechanism with the cover removed from the housing according to the first embodiment; Sectional drawing along the XII-XII line of FIG. The perspective view which shows the periphery of the drive mechanism in the locked state which concerns on 2nd Embodiment. The perspective view which shows the periphery of the drive mechanism in the unlocked state which concerns on 2nd Embodiment. The perspective view which shows the periphery of the drive mechanism in the middle of changing from a locked state to an unlocked state which concerns on 2nd Embodiment.

[First embodiment]
FIG. 1 is an exploded perspective view of a steering lock device 1 of this embodiment. A steering lock device 1 is a device for restricting or permitting rotation of a steering shaft 2 (shown in FIG. 2) of a vehicle. FIG. 2 is a longitudinal sectional view of the steering lock device 1 in a state in which the steering shaft 2 is allowed to rotate according to this embodiment. FIG. 3 is a partial cross-sectional perspective view of the steering lock device 1 according to this embodiment. FIG. 3 shows a cross section obtained by cutting the housing 10 and the cover 20 .

In the following description, the state in which the steering lock device 1 restricts the rotation of the steering shaft 2 may be referred to as the locked state. Similarly, the state in which the steering lock device 1 permits the rotation of the steering shaft 2 may be called an unlocked state.

(Structure of steering lock device 1)
Referring to FIG. 1, the steering lock device 1 includes a housing 10, a cover 20, a lock member 30, a drive mechanism 40, an auxiliary lock member 50, an auxiliary lock spring 60, a transmission shaft 70, and a printed circuit board 80. and

The housing 10 has a rectangular box shape. The housing 10 is provided with a support portion 11 in which the steering column 3 (shown in FIG. 2) through which the steering shaft 2 (shown in FIG. 2) is inserted is fitted. Further, as shown in FIG. 3, the housing 10 is provided with a housing portion 12 that is a space for housing the auxiliary lock member 50 and the auxiliary lock spring 60 . The lock member 30 side of the accommodation portion 12 is open. On the other hand, the side opposite to the lock member 30 of the accommodation portion 12 is defined by the locking wall 13 .

The cover 20 has a rectangular box shape and is connected to the housing 10 to define a space for accommodating the lock member 30 , the drive mechanism 40 , the transmission shaft 70 and the printed circuit board 80 . Further, as shown in FIG. 3, the cover 20 is provided with an interlocking portion 21 that rotatably supports the transmission shaft 70 . The interlocking portion 21 is engaged with a flange portion 75 of the transmission shaft 70, which will be described later.

FIG. 4 is a perspective view showing the periphery of the drive mechanism 40 according to this embodiment.

The lock member 30 is movable between a locked position that restricts rotation of the steering shaft and an unlocked position that allows rotation of the steering shaft. Figures 2 and 3 show the locking member 30 in the unlocked position.

In the following description, the moving direction (advancing and retreating direction) of the locking member 30 may be referred to as the X direction. The direction in which the lock member 30 advances toward the locked position may be referred to as the +X direction, and the direction in which the lock member 30 retreats toward the unlocked position may be referred to as the -X direction. Also, the axial direction of the steering shaft 2 may be referred to as the Y direction. In this embodiment, the X direction and the Y direction are orthogonal. Furthermore, in the following description, the direction perpendicular to the X direction and the Y direction may be referred to as the Z direction.

The lock member 30 is plate-shaped. As shown in FIG. 2 , the lock member 30 is inserted into a first guide hole (first guide portion) 14 provided in the housing 10 . The first guide hole 14 extends in the X direction. Thereby, the lock member 30 is guided by the first guide hole 14 so as to be linearly movable in the X direction.

As shown in FIG. 4 , the locking member 30 is provided with a first engaging portion 31 . The first engaging portion 31 of the present embodiment is a notch provided in the lock member 30 . The first engaging portion 31 is closed on the side of the steering shaft 2 (shown in FIG. 2), that is, the +X direction side and one side in the Y direction (back side of the paper surface of FIG. 4). The first engaging portion 31 is open on the side opposite to the steering shaft 2, ie, the −X direction side, the other side in the Y direction (the front side of the paper surface of FIG. 4), and both sides in the Z direction. The lock member 30 also includes a first holding surface 32 that defines the steering shaft 2 side of the first engaging portion 31, that is, the +X direction side. The first holding surface 32 is orthogonal to the X direction.

As shown in FIGS. 5 and 6, when the lock member 30 is in the lock position, the first engaging portion 31 is arranged at the same position as the auxiliary lock member 50 in the X and Y directions, and is opposed to the auxiliary lock member 50 in the Z direction. ing. In other words, the first engaging portion 31 and the auxiliary locking member 50 are aligned when the locking member 30 is in the locked position.

Referring to FIG. 4 , the locking member 30 is provided with a second engaging portion 33 . The second engaging portion 33 of this embodiment is a groove provided in the lock member 30 . The second engaging portion 33 is closed on both sides in the X direction and one side in the Y direction (the back side of the paper surface of FIG. 4). The second engaging portion 33 is open on the other side in the Y direction (the front side of the paper surface of FIG. 4) and both sides in the Z direction. The locking member 30 has a second holding surface 34 that defines the −X direction side of the second engaging portion 33 . The second holding surface 34 is orthogonal to the X direction.

As shown in FIGS. 9 and 10, when the lock member 30 is in the unlocked position, the second engaging portion 33 is arranged at the same position as the auxiliary lock member 50 in the X and Y directions, and is opposed to the auxiliary lock member 50 in the Z direction. is doing. In other words, the second engaging portion 33 and the auxiliary locking member 50 are aligned when the locking member 30 is in the unlocked position.

Referring to FIG. 4, the second engaging portion 33 is arranged closer to the steering shaft 2 (shown in FIG. 2) than the first engaging portion 31, that is, to the +X direction side. That is, the first engaging portion 31 and the second engaging portion 33 are arranged with an interval in the X direction. In other words, the first holding surface 32 that defines the +X direction side of the first engaging portion 31 and the second holding surface 34 that defines the -X direction side of the second engaging portion 33 are spaced apart in the X direction. placed open.

A connection hole 35 through which a pin 44 (to be described later) is inserted is provided at the end of the lock member 30 opposite to the steering shaft 2 (shown in FIG. 2), that is, at the -X direction side.

The drive mechanism 40 includes an electric motor 41 , a gear member 42 rotated by the driving force of the electric motor 41 , and a cam member 43 operating in conjunction with the gear member 42 .

The electric motor 41 includes an electric motor main body 41a and an output shaft 41b extending from the electric motor main body 41a. A worm 41 c is attached to the output shaft 41 b of the electric motor 41 . Electric power is supplied to the electric motor main body 41a through a terminal 82 (shown in FIG. 1), which will be described later. When the electric motor body 41a is driven, the output shaft 41b and the worm 41c rotate integrally around the axis A1 of the output shaft 41b.

The gear member 42 has a cylindrical shape extending in the X direction. The gear member 42 includes a worm wheel 42 a that meshes with the worm 41 c of the electric motor 41 . As the worm 41c attached to the output shaft 41b of the electric motor 41 rotates, the worm wheel 42a rotates, and the gear member 42 as a whole rotates around the axis A2 of the gear member 42. As shown in FIG.

The gear member 42 includes a drive gear portion 42b that meshes with a first gear 72 of the transmission shaft 70, which will be described later. The drive gear portion 42b has a tooth trace linearly extending in the X direction. The drive gear portion 42b is formed integrally with the gear member 42. As shown in FIG. As the entire gear member 42 rotates about the axis A2, the driving gear portion 42b rotates about the axis A2. The drive gear portion 42b of the present embodiment is an example of an operating portion according to the present invention.

A trapezoidal female screw portion (not shown) is provided on the inner peripheral surface of the gear member 42 . The female threaded portion meshes with a later-described male threaded portion (not shown) of the cam member 43 .

As shown in FIG. 2 , the cam member 43 is accommodated in a second guide hole (second guide portion) 15 provided in the housing 10 . The second guide hole 15 extends in the X direction. As a result, the cam member 43 is guided by the second guide hole 15 so as to be linearly movable in the X direction. A trapezoidal male screw portion (not shown) is provided on the outer peripheral surface of the cam member 43 . The male threaded portion meshes with the female threaded portion of the gear member 42 . As a result, when the gear member 42 as a whole rotates around the axis A2, the cam member 43 linearly moves in the X direction.

The cam member 43 is provided with an insertion hole 43a through which the lock member 30 is inserted. The insertion hole 43a extends in the X direction. The cam member 43 is connected to the lock member 30 by attaching the pin 44 to the cam member 43 so that the pin 44 passes through the connection hole 35 of the lock member 30 while the lock member 30 is inserted through the insertion hole 43a. be done. Accordingly, when the cam member 43 linearly moves in the X direction, the lock member 30 linearly moves in the X direction.

A spring 45 is arranged in a contracted state in the insertion hole 43a. The spring 45 biases the lock member 30 toward the steering shaft 2, that is, toward the +X direction. Thereby, the lock member 30 is pressed against the pin 44 .

Referring to FIG. 4 , the auxiliary locking member 50 is movable from a non-engaging position where it does not engage with the locking member 30 toward an engaging position where it engages with the locking member 30 . The auxiliary locking member 50 of this embodiment can move linearly in the Z direction. The auxiliary lock member 50 is urged by an auxiliary lock spring 60 toward the lock member 30, that is, toward the engagement position.

The auxiliary locking member 50 has a slider 51 , a locking bar 52 and a buffer spring 53 . The auxiliary lock member 50 is housed in the housing portion 12 (shown in FIG. 3) of the housing 10 together with the auxiliary lock spring 60 .

The slider 51 of this embodiment can move linearly in the moving direction of the auxiliary locking member 50, that is, in the Z direction. As clearly shown in FIG. 4, the slider 51 includes a slider body 51a and a rack portion 51b that meshes with a second gear 73 of the transmission shaft 70, which will be described later. The slider body 51a extends in the Y direction. The rack portion 51b extends from one end of the slider body 51a in the Y direction toward the lock member 30 via a bent portion. That is, the slider 51 is L-shaped when viewed from the X direction.

The rack portion 51b has a tooth trace linearly extending in the X direction.

The slider 51 includes a sliding piece 51c provided at the end of the rack portion 51b on the lock member 30 side and extending toward one side in the Y direction.

The lock bar 52 includes a lock bar main body 52a and a projecting portion 52b provided at the end of the lock bar main body 52a on the lock member 30 side. The protruding portion 52b extends from the lock member 30 side end face of the lock bar main body 52a toward the lock member 30 side.

A sliding groove 52c that engages with the sliding piece 51c of the slider 51 is provided in the lock bar main body 52a. The sliding groove 52c extends in the Z direction. The sliding groove 52c is closed on one side and the other side in the Z direction, one side and the other side in the X direction, and one side in the Y direction (back side of the paper surface of FIG. 4). The sliding groove 52c is open on the other side in the Y direction (the front side of the paper surface of FIG. 4). As a result, the lock bar 52 can move linearly with respect to the slider 51 in the movement direction of the auxiliary lock member 50, that is, in the Z direction.

The buffer spring 53 is arranged in a contracted state between the slider body 51a and the lock bar body 52a. Thereby, the buffer spring 53 biases the lock bar 52 toward the lock member 30 .

Auxiliary locking spring 60 is located within housing 12 (shown in FIG. 3). The auxiliary lock spring 60 is arranged in a contracted state between the slider 51 of the auxiliary lock member 50 and the locking wall 13 (shown in FIG. 3) of the housing 10 . Thereby, the auxiliary lock spring 60 biases the auxiliary lock member 50 (more specifically, the slider 51 ) toward the lock member 30 .

The transmission shaft 70 includes a transmission shaft main body 71 , a first gear 72 , a second gear 73 , an enlarged diameter portion 74 and a collar portion 75 . The transmission shaft 70 is arranged in the third guide hole 16 of the housing 10, as shown in FIG.

The transmission shaft main body 71 has a columnar shape extending in the X direction. The transmission shaft body 71 is rotatably supported by the housing 10 (shown in FIG. 3) and the cover 20 (shown in FIG. 3). The transmission shaft main body 71 is provided with a second gear 73, an enlarged diameter portion 74, a first gear 72, and a flange portion 75 in this order from the +X direction to the -X direction.

The first gear 72 is a spur gear having tooth traces linearly extending in the direction in which the transmission shaft body 71 extends, that is, in the X direction. The first gear 72 is provided on the outer circumference of the transmission shaft body 71 . The first gear 72 is arranged coaxially with the transmission shaft body 71 . The first gear 72 meshes with the driving gear portion 42b of the gear member 42. As shown in FIG. Accordingly, when the gear member 42 rotates about the axis A2, the transmission shaft 70 rotates about the axis A3 of the transmission shaft main body 71. As shown in FIG. The first gear 72 of this embodiment is an example of an input section according to the present invention.

The second gear 73 is a spur gear having tooth traces linearly extending in the direction in which the transmission shaft body 71 extends, that is, in the X direction. The second gear 73 is provided at the end of the transmission shaft main body 71 on the +X direction side. Also. The second gear 73 is arranged within the housing portion 12 (shown in FIG. 3) of the housing 10 . The second gear 73 is arranged coaxially with the transmission shaft main body 71 and the first gear 72 . The second gear 73 of this embodiment is an example of an output section according to the present invention.

The second gear 73 meshes with the rack portion 51b of the auxiliary lock member 50. As shown in FIG. When the transmission shaft 70 rotates about the axis A3, the second gear 73 rotates about the axis A3, and the auxiliary lock member 50 linearly moves in the Z direction. As a result, the auxiliary locking member 50 moves between the engaging position where it engages with the locking member 30 and the non-engaging position where it does not engage with the locking member 30 .

On the other hand, when the second gear 73 is engaged with the rack portion 51b of the auxiliary lock member 50, movement of the auxiliary lock member 50 due to the biasing force of the auxiliary lock spring 60 is restricted.

The enlarged diameter portion 74 is a cylindrical portion provided on the outer circumference of the transmission shaft main body 71 . The outer shape of the enlarged diameter portion 74 is larger than the outer shape of the transmission shaft main body 71 . The outer shape of the enlarged diameter portion 74 is slightly smaller than the inner shape of the third guide hole 16 of the housing 10 .

The collar portion 75 is an annular portion provided at the end portion of the transmission shaft main body 71 on the -X direction side. The outer shape of the collar portion 75 is larger than the outer shape of the transmission shaft main body 71 . The collar portion 75 is attached to the interlocking portion 21 (shown in FIG. 3) of the cover 20 . Thereby, the transmission shaft 70 is rotatably supported by the cover 20 . On the other hand, the engagement between the collar portion 75 and the interlocking portion 21 of the cover 20 restricts the movement of the transmission shaft 70 in the X direction.

As clearly shown in FIG. 3 , the interlocking portion 21 includes a first portion 21 a that rotatably supports a portion of the transmission shaft body 71 on the −X direction side of the flange portion 75 , and a flange portion of the transmission shaft body 71 . and a second portion 21b that rotatably supports a portion on the +X direction side of the portion 75 . The first portion 21a is arranged on the −X direction side of the flange portion 75, and engages with the flange portion 75 to restrict movement of the transmission shaft 70 in the −X direction side. On the other hand, the second portion 21b is arranged on the +X direction side of the flange portion 75 and engages with the flange portion 75 to restrict movement of the transmission shaft 70 in the +X direction side. The first portion 21a and the second portion 21b are arranged so as to sandwich the flange portion 75 from both sides in the X direction.

Referring to FIG. 1, a plurality of electronic components are mounted on printed circuit board 80 . Specifically, the printed circuit board 80 is mounted with a connector 81 for electrically connecting to an external power source (not shown) and a terminal 82 for supplying electric power from the external power source to the electric motor 41 .

(Operation of steering lock device 1)
The operation of the steering lock device 1 will be described with reference to FIGS. 5 to 12. FIG.

5, 7, and 9 are side views showing the periphery of the drive mechanism 40. FIG. FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. FIG. 8 is a cross-sectional view along line VIII-VIII of FIG. 10 is a cross-sectional view taken along line XX of FIG. 9. FIG. 5 and 6 show the locking member 30 in the locked position. 7 and 8 show a state in which the lock member 30 is moving from the lock position to the unlock position. 9 and 10 show the lock member 30 in the unlocked position.

5 and 6, when the lock member 30 is in the locked position, the auxiliary lock member 50 is restricted from moving by the biasing force of the auxiliary lock spring 60 due to engagement with the transmission shaft 70. As shown in FIG. 6, the sliding piece 51c of the slider 51 engages with a wall portion 52d defining the sliding groove 52c of the lock bar 52 on the side opposite to the lock member 30. As shown in FIG. Also, the projecting portion 52b of the lock bar 52 is separated from the lock member 30 in the Z direction. As shown in FIG. 5, the first engaging portion 31 of the locking member 30 and the auxiliary locking member 50 are aligned.

When the electric motor 41 rotates forward (or reverse) from the locked state shown in FIGS. 5 and 6, the gear member 42 rotates about the axis A2. As a result, the cam member 43 moves in the direction opposite to the steering shaft 2 (shown in FIG. 2), that is, in the -X direction. Accordingly, the lock member 30 moves in the direction opposite to the steering shaft 2, that is, in the -X direction. On the other hand, as the gear member 42 rotates, the transmission shaft 70 rotates about the axis A3. As a result, the slider 51 moves toward the lock member 30 .

As shown in FIGS. 7 and 8, the tip of the projecting portion 52b of the lock bar 52 is in contact with the lock member 30 while the lock member 30 is moving from the lock position to the unlock position. In this state, even if the second gear 73 of the transmission shaft 70 rotates further and the slider 51 moves further toward the lock member 30, the buffer spring 53 shrinks so that the lock bar 52 does not move.

7 and 8, the lock member 30 moves further in the direction opposite to the steering shaft 2 (shown in FIG. 2), that is, in the -X direction, as shown in FIGS. reaches the unlocked position. At this time, when the second engaging portion 33 of the locking member 30 and the auxiliary locking member 50 face each other and the engagement between the locking member 30 and the projecting portion 52b is released, the locking bar 52 is released by the biasing force of the buffer spring 53. , the second engaging portion 33 and the protruding portion 52b are engaged with each other.

As shown in FIG. 9, when the lock member 30 is in the unlocked position, the engagement between the second engaging portion 33 (more specifically, the second holding surface 34) and the projecting portion 52b causes the lock member 30 to be unlocked. Since movement toward the steering shaft 2 (shown in FIG. 2), that is, toward the +X direction, is restricted, the lock member 30 is held at the unlocked position.

On the other hand, when the electric motor 41 reverses (or forwards) from the unlocked state shown in FIGS. 9 and 10, the gear member 42 rotates about the axis A2. At this time, the cam member 43 moves toward the steering shaft 2 (shown in FIG. 2), that is, toward the +X direction. Accordingly, the lock member 30 moves toward the steering shaft 2, that is, toward the +X direction. On the other hand, as the gear member 42 rotates, the transmission shaft 70 rotates about the axis A3. Thereby, the auxiliary locking member 50 moves away from the locking member 30 . In the unlocked state, the wall portion 52d of the lock bar 52 and the sliding piece 51c of the slider 51 are engaged with each other. move away from member 30; Therefore, the projecting portion 52b of the lock bar 52 does not hinder the movement of the lock member 30 toward the steering shaft 2, that is, toward the +X direction.

When the lock member 30 moves further toward the steering shaft 2, that is, in the +X direction, the lock member 30 reaches the lock position as shown in FIGS. At this time, the auxiliary locking member 50 also moves further away from the locking member 30 and reaches the disengaged position.

FIG. 11 is a side view showing the periphery of the drive mechanism 40. FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 11. FIG. 11 and 12 show the state in which the connection between the housing 10 and the cover 20 is released. More specifically, FIGS. 11 and 12 show the steering lock device 1 when the connection between the housing 10 and the cover 20 is released from the locked state shown in FIGS. 5 and 6. FIG. The operation of the steering lock device 1 when the connection between the housing 10 and the cover 20 is released from the locked state will be described below.

In the locked state shown in FIGS. 5 and 6, the transmission shaft 70 is restricted from moving in the -X direction by the cover 20 (shown in FIG. 3). When the connection between the housing 10 and the cover 20 is released from this state, the restriction on the movement of the transmission shaft 70 by the cover 20 is released, and the transmission shaft 70 is located on the opposite side of the steering shaft 2 (shown in FIG. 2), that is, −Movement in the X direction is allowed. When the cover 20 moves in the -X direction in this state, the transmission shaft 70 is interlocked with the movement of the cover 20 because the collar portion 75 of the transmission shaft 70 and the interlocking portion 21 of the cover 20 are engaged. It moves in the direction opposite to the steering shaft 2, that is, in the -X direction. Since the transmission shaft 70 is guided by the third guide hole 16 (shown in FIG. 3) of the housing 10 so as to be able to move linearly, the smooth movement of the transmission shaft 70 in conjunction with the cover 20 is achieved.

When the transmission shaft 70 moves in the -X direction, the engagement between the second gear 73 and the rack portion 51b of the auxiliary lock member 50 is released, and movement of the auxiliary lock member 50 by the biasing force of the auxiliary lock spring 60 is permitted. . At this time, the auxiliary lock member 50 is biased toward the lock member 30 by the auxiliary lock spring 60 .

When the auxiliary locking member 50 moves toward the locking member 30, the auxiliary locking member 50 and the first engaging portion 31 of the locking member 30 are engaged as shown in FIGS. That is, the auxiliary locking member 50 moves from the non-engaging position to the engaging position. In this state, the engagement between the first holding surface 32 of the lock member 30 and the projecting portion 52b restricts the movement of the lock member 30 in the -X direction (downward in FIG. 11). In this way, even if the cover 20 is removed from the housing 10 due to fraud such as theft, the lock member 30 is maintained at the locked position.

Although not shown, the first gear 72 and the second gear of the transmission shaft 70 when viewed from the direction of movement of the transmission shaft 70 when the connection between the housing 10 and the cover 20 is released (the X direction in this embodiment). 73 and enlarged diameter portion 74 do not overlap with other components (eg, worm wheel 42a, drive gear portion 42b). As a result, smooth movement of the transmission shaft 70 in conjunction with the cover 20 is achieved.

The first gear 72 is configured so that the addendum circle of the first gear 72 does not overlap the addendum circle of the worm wheel 42a and the output shaft 41b of the electric motor 41 when viewed in the X direction.

When the second gear 73 is viewed in the X direction, the addendum circle of the second gear 73 is aligned with the addendum circle of the worm wheel 42a, the addendum circle of the drive gear portion 42b, and the output shaft 41b of the electric motor 41. Duplication is avoided.

When viewed from the X direction, the enlarged diameter portion 74 does not overlap the addendum circle of the worm wheel 42a, the addendum circle of the drive gear portion 42b, and the output shaft 41b of the electric motor 41. It's like

The steering lock device 1 of this embodiment has the following functions.

When the cover 20 is removed from the housing 10 by fraud or the like while the lock member 30 is in the lock position, the transmission shaft 70 moves so as to disengage from the auxiliary lock member 50 . As a result, the auxiliary locking member 50 moves from the non-engaging position to the engaging position by the biasing force of the auxiliary locking spring 60 and engages with the first engaging portion 31 of the locking member 30 . As a result, even if the cover 20 is removed from the housing 10 by fraudulent act or the like, the lock member 30 is held in the locked position.

On the other hand, when the lock member 30 moves from the locked position to the unlocked position, the auxiliary lock member 50 moves from the disengaged position to the engaged position in conjunction with the gear member 42 and the transmission shaft 70 to lock. It engages with the second engaging portion 33 of the member 30 . As a result, the lock member 30 is held at the unlocked position.

According to this configuration, the auxiliary lock member 50 has the function of holding the lock member 30 at the lock position and the function of holding the lock member 30 at the unlock position, so the steering lock device 1 has these functions. The size of the steering lock device 1 can be reduced compared to the case where the mechanism is provided separately.

In the case where the auxiliary locking member is composed of one part, the second position of the transmission shaft 70 is in a state where the auxiliary locking member and the locking member 30 are in contact (for example, the state shown in FIGS. 7 and 8). Even if the gear 73 is further rotated, the auxiliary locking member cannot move any further. If an attempt is made to further rotate the second gear 73 of the transmission shaft 70 from this state, an excessive load is applied to the second gear 73 and the second gear 73 may be damaged. On the other hand, in the present embodiment, when the second gear 73 of the transmission shaft 70 rotates further from the state where the protrusion 52b of the lock bar 52 and the lock member 30 are in contact with each other, the buffer spring 53 contracts. , movement of the slider 51 (rotation of the second gear 73) is permitted. Therefore, even if the second gear 73 is further rotated from the state in which the projecting portion 52b of the lock bar 52 and the lock member 30 are in contact with each other, the second gear 73 is not subjected to an excessive load. , the second gear 73 can be prevented from being damaged.

[Second embodiment]
FIG. 13 is a perspective view of essential parts in a locked state of the steering lock device according to the second embodiment. FIG. 14 is a perspective view of essential parts of the steering lock device according to the second embodiment in an unlocked state.

The steering lock device of the second embodiment has the same configuration as the steering lock device 1 of the first embodiment except for configurations of an auxiliary lock member 150, an auxiliary lock spring 160, and a transmission shaft 170. FIG. In the second embodiment, the same reference numerals are assigned to the same configurations as in the first embodiment, and detailed description thereof will be omitted.

13 and 14, the auxiliary locking member 150 includes a shaft portion 151 and an L-shaped locking bar 152. As shown in FIG.

The shaft portion 151 is rotatably supported by the housing 10 (shown in FIG. 1). The auxiliary lock member 150 can move between the disengaged position shown in FIG. 13 and the engaged position shown in FIG. 14 by rotating about the axis A4 of the shaft portion 151 .

The auxiliary lock member 150 is biased toward the engagement position by an auxiliary lock spring 160 attached to the shaft portion 151 of the auxiliary lock member 150 .

The transmission shaft 170 of this embodiment includes a transmission shaft main body 171 , a rack portion 172 and a collar portion 173 .

The transmission shaft main body 171 has a columnar shape extending in the X direction. The end of the transmission shaft main body 171 on the +X direction side is engaged with the lock bar 152 . When the +X direction end of the transmission shaft body 171 is engaged with the lock bar 152 , the position of the auxiliary lock member 150 is determined by the position of the transmission shaft body 171 , and the biasing force of the auxiliary lock spring 160 is applied. Movement of the auxiliary lock member 150 is restricted. The +X direction side end of the transmission shaft main body 171 of the present embodiment is an example of an output section according to the present invention.

The rack portion 172 has a tooth trace extending linearly in the direction in which the transmission shaft body 171 extends, that is, in the X direction. The rack portion 172 meshes with the driving gear portion 42b of the gear member 42. As shown in FIG. As a result, when the gear member 42 rotates about the axis A2, the transmission shaft 170 linearly moves in a direction perpendicular to the X direction (indicated by an arrow in the drawing). The rack section 172 of this embodiment is an example of an input section according to the present invention.

The flange portion 173 is provided at the end portion of the transmission shaft main body 171 on the −X direction side. The collar portion 173 is supported by an interlocking portion (not shown) provided on the cover 20 (shown in FIG. 1) so as to be linearly movable in a direction perpendicular to the X direction (indicated by an arrow in the figure).

(Operation of steering lock device)
The operation of the steering lock device will be described with reference to FIGS. 13 to 15. FIG.

Referring to FIG. 13, when the lock member 30 is in the locked position, the auxiliary lock member 150 is held in the non-engaged position by being restricted from moving by the biasing force of the auxiliary lock spring 60 due to engagement with the transmission shaft 170. ing. Also, the first engaging portion 31 of the locking member 30 and the auxiliary locking member 150 are aligned.

When the electric motor 41 rotates forward (or reverse) from the locked state shown in FIG. 13, the gear member 42 rotates about the axis A2. As a result, the cam member 43 moves in the direction opposite to the steering shaft 2 (shown in FIG. 2), that is, in the -X direction. Accordingly, the lock member 30 moves in the direction opposite to the steering shaft 2, that is, in the -X direction. On the other hand, the transmission shaft 170 linearly moves as the gear member 42 rotates. Along with this, the auxiliary lock member 150 rotates about the axis A4 due to the biasing force of the auxiliary lock spring 160 .

As shown in FIG. 14, when the lock member 30 reaches the unlock position, the lock bar 152 rotated to the engagement position engages with the second engagement portion 33 . When the lock member 30 is in the unlocked position, the lock bar 152 is engaged with the second engaging portion 33 (more specifically, the second holding surface 34) to move the lock member 30 toward the steering shaft 2, that is, +X. Since movement in the direction is restricted, the lock member 30 is held at the unlocked position.

On the other hand, when the electric motor 41 reverses (or forwards) from the unlocked state shown in FIG. 14, the gear member 42 rotates about the axis A2. At this time, the cam member 43 moves toward the steering shaft 2 (shown in FIG. 2), that is, toward the +X direction. Accordingly, the lock member 30 moves toward the steering shaft 2, that is, toward the +X direction. On the other hand, the transmission shaft 170 linearly moves as the gear member 42 rotates. When the transmission shaft 170 moves linearly, the end of the transmission shaft main body 171 on the +X direction side pushes the lock bar 152 , so that the auxiliary lock member 150 is released from the engagement position against the biasing force of the auxiliary lock spring 160 . Move to engagement position.

FIG. 15 is a perspective view of the essential parts of the steering lock device in a state in which the housing 10 (shown in FIG. 1) and the cover 20 (shown in FIG. 1) are disconnected. More specifically, FIG. 15 shows the steering lock device when the connection between the housing 10 and the cover 20 is released from the locked state shown in FIG. The operation of the steering lock device when the connection between the housing 10 and the cover 20 is released from the locked state will be described below.

In the locked state shown in FIG. 13, the transmission shaft 170 is restricted from moving in the -X direction by the cover 20 (shown in FIG. 3). When the connection between the housing 10 and the cover 20 is released from this state, the restriction on the movement of the transmission shaft 170 by the cover 20 is released, and the transmission shaft 170 is located on the opposite side of the steering shaft 2 (shown in FIG. 2), that is, −Movement in the X direction is allowed. When the cover 20 moves in the -X direction in this state, the transmission shaft 170 moves in conjunction with the movement of the cover 20 because the flange portion 173 of the transmission shaft 170 and the interlocking portion 21 of the cover 20 are engaged. , in the direction opposite to the steering shaft 2, that is, in the -X direction.

When the transmission shaft 170 moves in the direction opposite to the steering shaft 2 (shown in FIG. 2), that is, in the -X direction, the +X direction end of the transmission shaft main body 171 engages with the lock bar 152 of the auxiliary lock member 150. is released, and movement of the auxiliary lock member 150 by the biasing force of the auxiliary lock spring 160 is permitted.

When the auxiliary lock member 150 is moved to the engagement position by the biasing force of the auxiliary lock spring 160, the auxiliary lock member 150 and the first engaging portion 31 of the lock member 30 are engaged as shown in FIG. In this state, the engagement between the first holding surface 32 of the lock member 30 and the lock bar 152 restricts the movement of the lock member 30 in the -X direction (downward in FIG. 15). In this way, even if the cover 20 is removed from the housing 10 due to fraud such as theft, the lock member 30 is maintained at the locked position.

The steering lock device of the second embodiment has the same effects as the steering lock device 1 of the first embodiment.

As described above, specific embodiments of the present invention have been described, but the present invention is not limited to the first and second embodiments, and various modifications can be made within the scope of the present invention. can be done.

In the first embodiment, the flange portion 75 of the transmission shaft 70 and the interlocking portion 21 of the cover 20 are engaged on both sides in the X direction, and when the cover 20 is removed from the housing 10 , the transmission shaft 70 is moved to the cover 20 . Although it is configured to be moved in the -X direction together with , it is not limited to this. For example, the collar portion 75 and the interlocking portion 21 are engaged only on the -X direction side, that is, the cover 20 restricts only the movement of the transmission shaft 70 in the -X direction side, and moves the transmission shaft 70 in the -X direction side. An urging spring is provided, and when the cover 20 is removed from the housing 10, the urging force of the spring moves the transmission shaft 70 in the -X direction, thereby engaging the second gear 73 and the auxiliary lock member 50. may be configured to release the

Reference Signs List 1 steering lock device 2 steering shaft 3 steering column 10 housing 11 support portion 12 accommodating portion 13 locking wall 14 first guide hole 15 second guide hole 16 third guide hole 20 cover 21 interlocking portion 30 lock member 31 first engagement Part 32 First Holding Surface 33 Second Engagement Part 34 Second Holding Surface 35 Connection Hole 40 Drive Mechanism 41 Electric Motor 41a Electric Motor Body 41b Output Shaft 41c Worm 42 Gear Member 42a Worm Wheel 42b Drive Gear Part (Operating Part)
43 Cam member 43a Insertion hole 44 Pin 45 Spring 50 Auxiliary lock member 51 Slider 51a Slider main body 51b Rack portion (operation receiving portion)
51c Sliding piece 52 Lock bar 52a Lock bar body 52b Protrusion 52c Slide groove 52d Wall 53 Buffer spring 60 Auxiliary lock spring 70 Transmission shaft 71 Transmission shaft body 72 First gear (input part)
73 2nd gear (output part)
74 expanded diameter portion 75 collar portion 80 printed circuit board 81 connector 82 terminal

Claims (4)

a housing;
a cover coupled with the housing;
a locking member movable between a locked position that restricts rotation of the steering shaft and an unlocked position that allows rotation of the steering shaft;
a driving mechanism having a motor for moving the locking member;
an operating unit provided in the drive mechanism and operated by the driving force of the motor;
an auxiliary locking member movable between an engaging position where it engages with the locking member and a non-engaging position where it does not engage with the locking member;
a first spring that biases the auxiliary lock member from the non-engaged position toward the engaged position;
In the state of engagement with the auxiliary lock member, movement of the auxiliary lock member due to the biasing force of the first spring is regulated, and the auxiliary lock member is actuated in accordance with the operation of the operating portion to engage the auxiliary lock member. a transmission shaft for movement between an engaged position and the disengaged position;
When the cover is removed from the housing, the transmission shaft is disengaged from the auxiliary lock member as the cover is moved, whereby the biasing force of the first spring causes the transmission shaft to disengage from the auxiliary lock member. an interlocking part that allows movement of the auxiliary locking member from the non-engaging position toward the engaging position,
The lock member is
a first engaging portion aligned with the auxiliary locking member when in the locking position;
a second engaging portion aligned with the auxiliary locking member when in the unlocked position;
The auxiliary lock member holds the lock member at the lock position when engaged with the first engagement portion, and holds the lock member at the unlock position when engaged with the second engagement portion. locking device. The auxiliary lock member has an operation receiving portion that receives an operation from the transmission shaft,
The transmission shaft is
an input unit to which the driving force of the motor is input;
The steering lock device according to claim 1, further comprising: an output section that operates integrally with the input section and engages with the operation receiving section. the auxiliary locking member is linearly movable between the non-engaging position and the engaging position;
The auxiliary locking member is
a slider provided with the operation receiving portion and capable of moving linearly in the movement direction of the auxiliary lock member;
a lock bar that can move directly with respect to the slider in the movement direction of the auxiliary lock member;
The steering lock device according to claim 2, further comprising a second spring arranged between the slider and the lock bar. The operation receiving portion is a rack,
4. The steering lock device according to claim 2, wherein said output portion is a pinion meshing with said operation receiving portion.

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