JP6245813B2 - Steering lock device - Google Patents

Description

  The present invention relates to a steering lock device.

  The steering lock device described in Patent Document 1 is known as a steering lock device that moves the locking body forward and backward with respect to the steering shaft by rotating the plug accommodated in the frame and performs the switching operation of the ignition switch fixed to the frame. Yes.

  In this conventional example, the steering lock device has a rotation projecting member (cam) connected to a rotation lock (plug) and a lock bar (locking body) connected to a control bar driven by the cam surface of the cam. As the plug rotates, the locking body is reciprocated between a locking position for locking the steering shaft and an on position for releasing the locking, and at the same time, an electric switch assembly (ignition switch) connected to the rear end of the frame. Operate.

JP 2000-203387 A

  However, in the conventional example described above, the plug has the following problems because it can be freely rotated in both reciprocating directions with a genuine unlocking key inserted. In other words, once the user has rotated the start position beyond the ON position, it is allowed to return to the ON position, which is the operating state, and to rotate again to the start position. It is inevitable to start the starter cell again.

  The present invention has been made to solve the above-described drawbacks, and an object of the present invention is to provide a steering lock device that can regulate the rotation to the start position again after the rotation to the start position.

According to the present invention, the object is
Drive of a cam 4 which is inserted into a frame 2 fixed to the steering column 1 and rotates about the same rotation axis together with the plug 3 with respect to a plug 3 which is rotated between a lock position, an on position and a start position. A cam follower 6 driven by the surface 5;
The cam follower 6 follows the cam follower 6 and moves between a position where it is locked to the steering shaft that is inserted through the steering column 1 and is locked in the frame 2 and is released from the steering shaft. Locking body 7 to be
The cam follower 6 is driven in the axial direction of the cam 4 by the drive surface 5 in accordance with the rotation operation between the lock position and the on position of the plug 3,
The locking body 7 is connected to a connecting body 10 that follows the cam follower 6 and moves forward and backward in the axial direction of the cam 4, and the locking position and the unlocking position of the steering shaft are determined by the forward and backward movement of the connecting body 10. Driven between and
The cam 4 has a start corresponding position (PO1) corresponding to the start position via the first ON corresponding position (PO1) corresponding to the ON position from the first lock corresponding position (PL1) corresponding to the lock position. In addition to the first follower movement path (R1) leading to PS), the start corresponding position (PS) is used as a starting end and the first follower movement path (R1) is deviated toward the center of the cam 4. And a second follower movement path (R2) leading to the second on-corresponding position (PO2) and the first lock-corresponding position (PL1) is formed,
A steering lock device provided with a restricting portion 8 that restricts the movement of the cam follower 6 toward the start corresponding position (PS) and prevents the plug 3 from rotating in the corresponding direction at the second on-corresponding position (PO2). Achieved by providing.

  The steering lock device drives the lock body 7 between the lock position and the unlock position by rotating the plug 3 between the lock position and the on position, and the lock body 7 is in the lock position. The steering shaft is locked to restrict the rotation operation to the steering shaft, and the locked state to the steering shaft is released by the movement to the unlock position to allow the rotation operation to the steering shaft.

  Further, when the rotation terminal of the ignition switch 13 connected to the frame 2 is operated by rotating the plug 3, and the plug 3 is rotated beyond the ON position to the start position, the ignition switch 13 is rotated to the start position, An engine start operation is performed.

  The cam follower 6 that drives the locking body 7 by the rotation of the plug 3 includes a first lock corresponding position (PL1) corresponding to the lock position along the drive surface 5 along with the rotation of the plug 3, and a first ON corresponding to the ON position. It moves between the corresponding position (PO1) and the start corresponding position (PS) corresponding to the start position.

  The cam follower 6 that has passed through the start corresponding position (PS) is led to a second on corresponding position (PO2) different from the first on position (PO1), and the second on corresponding position (PO2) is moved to the start corresponding position (PS) side. By providing the restricting portion 8 that restricts the movement of the cam follower 6, the rotation of the cam 4, that is, the rotation of the plug 3 is inhibited by the cam follower 6 and is prohibited.

  As a result, the rotation operation to the plug 3 that once rotates to the start position and then returns to the start position is prohibited, and the restart operation to the already started engine can be reliably prevented. Further, since the restricting portion 8 is formed on the cam 4 for driving the locking body 7, no special parts are required and the structure is simplified.

The restricting portion 8 can be realized, for example, by mounting a gate member that can rotate only in one direction at the second ON corresponding position (PO2).
The cam follower 6 is pressed against the wall surface of the follower moving path by appropriate biasing means,
When the restricting portion 8 constitutes a steering lock device formed by providing a stepped protrusion for restricting the movement of the cam follower 6 to the start corresponding position (PS) side on the pressure contact wall surface by the cam follower 6. The control part 8 can be easily realized without using a special gate member or the like.

  In this case, the stepped protrusion can be provided on the drive surface 5 in addition to being provided on the side wall of the cam that rises along the drive surface 5 as shown in the embodiments described later.

In addition, the cam follower 6 is introduced from the first follower movement path (R1) to the second follower movement path (R2) at the start corresponding position (PS) in a state where the cam follower 6 is in pressure contact with the wall surface of the follower movement path. The first and second follower movement paths (R2) are arranged in parallel in the pressure contact direction, and can be easily realized by a known technique of cutting out the pressure contact wall surface of the first follower movement path (R1). In this case,
The cam follower 6 is biased toward the rotation center of the cam 4 ,
In addition, the pressure-contacted wall surface of the first follower movement path (R1) by the cam follower 6 is notched at the start corresponding position (PS) to form an introduction opening 9 for the cam follower 6 to the second follower movement path (R2). When configured as described above, the size of the cam 4 in the center direction can be effectively used, and thus the cam 4 can be reduced in size.

Furthermore, in order to move the cam follower 6 along the follower moving path, it can be realized by configuring the positive cam 4 with the cam follower 6 and the drive surface 5.
When the connecting body 10 is urged in the locking direction of the locking body 7 and is connected to the cam follower 6 so that the cam follower 6 is pressed against the drive surface 5 by the urging force in the locking direction, the structure of the cam 4 is It will be easy.

The steering lock device
The plug 3 is fitted with a stopper 12 that protrudes from the plug 3 with the unlocking key 11 inserted and engages with the coupling body 10 in the locked position to restrict the locking body 7 from moving to the locked position.
The cam 4 is provided with a second lock corresponding position (PL2) corresponding to a restriction position by the stopper 12 of the cam follower 6,
The second lock corresponding position (PL2) and the first lock corresponding position (PL1) are configured to be connected via a connection path (RC) formed in the axial length direction of the rotation center of the cam 4. Can do.
in this case,
A third follower movement path (R3) connected to the first follower movement path (R1) from the second lock corresponding position (PL2) through the first on corresponding position (PL1 ) is provided. When the steering lock device is configured, after moving to the start position, it is possible to operate to the start position again by once rotating to the lock position without inserting / removing the unlocking key 11, and the operability is improved. .

  According to the present invention, the rotation to the start position can be restricted again after the rotation to the start position with a simple structure.

It is sectional drawing which shows this invention. (A) is a view showing the rotation angle of the plug, (b) is a front view of the cam, (c) is a right side view of the cam, (d) is a bottom view of the cam, and (e) is a view showing the cam. It is a perspective view of a cam. It is a figure which shows the state which rotated the plug, (a) is sectional drawing which shows a locked position, (b) is sectional drawing rotated to the ON position, (c) is sectional drawing corresponding to FIG. 1 in an ON position. is there. FIG. 4 is a diagram illustrating a state in which the plug is rotated, in which (a) is a cross-sectional view illustrating a start position, (b) is a cross-sectional view illustrating a state in which the plug is rotated from a start position to an on position, FIG. 6D is a cross-sectional view showing a state where the unlocking key is removed at the lock position. It is a figure which shows the steering lock apparatus in a locked position, (a) is sectional drawing which shows the state which inserted the unlocking key, (b) is sectional drawing which shows the state which extracted the unlocking key.

  As shown in FIG. 1, the steering lock device includes a cylinder lock 14 accommodated in the frame 2, a cam 4, a connecting body 10, and a locking body 7, and the frame 2 is fixed to the steering column 1. Used. Further, an ignition switch 13 is connected to the frame 2, and a rotational operation force to the cylinder lock is transmitted through a gear 15 that meshes with a gear portion 4 a formed on the outer peripheral wall of the cam 4.

  The cylinder lock 14 is formed by inserting the plug 3 into the cylinder case 14a. The plug 3 can be rotated with respect to the cylinder case 14a, that is, the frame 2 with the genuine unlocking key 11 inserted. . A stopper mounting opening 3 a is formed at the tip of the plug 3, and a stopper 12 that protrudes from the outer periphery of the plug 3 with the unlocking key 11 inserted into the stopper mounting opening 3 a is movable in the radial direction of the plug 3. Installed.

  As shown in FIG. 2 (a), the plug 3 can be rotated between the locked position, the on position, and the start position, and the locking body 7 is shown in FIG. 1 when the plug 3 is in the locked position. As shown in the figure, it is held at a lock position that protrudes from the frame 2 and engages with a steering shaft (not shown) that passes through the steering column 1 and restricts the rotational operation to the steering shaft. When the plug 3 is rotated from this state to the on position, the locking body 7 moves to the unlocked position where it is accommodated in the frame 2 and unlocked from the steering shaft, as shown in FIG. When the plug 3 is further rotated from this state to the start position, the ignition switch 13 is moved from the on position to the start position while the locking body 7 is held in the unlock position, and the starter switch is operated to start the engine. The operation is performed.

  The connecting body 10 is a plate-like member that is long in the longitudinal direction of the rotation axis of the plug 3, and is mounted in the frame 2 so as to be movable in the longitudinal direction while being urged rearward by the first compression spring 16. The locking body 7 is coupled to the rear end of the coupling body 10 so that the hook portion 7a is locked to the coupling opening 10a. The locking body 7 is pushed out and moved to the lock position as it moves rearward. Let

  A cam follower 6 is connected to the front end portion of the connecting body 10. As shown in FIGS. 1 and 3, the cam follower 6 is formed by extending two leg pieces 6 b at the lower end of a cap portion 6 a whose tip is closed, and the spring of the first compression spring 16 of the coupling body 10. The follower support piece 10b also serving as a receiver is mounted so as to be sandwiched between the two leg pieces 6b. In the mounted state, the cam follower 6 is connected in the moving direction of the connecting body 10 by penetrating the connecting body 10 with the cap portion 6a protruding to the plug 3 side, and is movable in the radial direction of the plug 3. Yes, and biased toward the center of the plug 3 by the second compression spring 17.

  On the other hand, the cam 4 is formed in a cylindrical shape, is connected to the rear end of the plug 3, and rotates around the same rotation axis together with the plug 3. As described above, the gear 4a that meshes with the gear 15 for transmitting the rotational force to the ignition switch 13 is formed in the almost half circumference of the outer periphery of the cam 4, and the remaining half circumference is used for driving. Surface 5 is formed.

  As shown in FIG. 2, the drive surface 5 is formed along a circumferential surface of the cam 4 and is formed in a step shape that opens forward.

  The cam follower 6 is pressed against the cam 4 by a rearward biasing force of the first compression spring 16, and a side wall portion of the cap portion 6 a is in pressure contact with the drive surface 5, and a biasing force of the second compression spring 17 The tip is in pressure contact with the side wall surface (pressure contact wall surface) of the cam 4 rising along the drive surface 5.

  FIG. 2B and subsequent figures show the relative movement path of the cam follower 6 accompanying the rotation of the plug 3, that is, the rotation of the cam 4. First, when the plug 3 is in the initial rotation position, that is, in the locked position, The cam follower 6 is located at the first lock corresponding position (PL1). As shown in FIG. 2 (d), since the first lock corresponding position (PL 1) is located at the rearmost position in the axial length direction of the cam 4, the coupling body 10 is pushed by the first compression spring 16. As shown in FIG. 1, the lock body 7 is held in the locked position.

  When the plug 3 is rotated to the ON position from this state, the cam follower 6 moves to the first ON corresponding position (PO1) while being pulled forward against the reaction force of the first compression spring 16, and the cam follower 6 is moved in the longitudinal direction. As shown in FIG. 3C, the locking body 7 moves to the unlock position and is held at that position.

  When the plug 3 is further rotated from the unlock position to the start position, the cam follower 6 moves to the start corresponding position (PS) via the adjustment slope 5a. Since the start corresponding position (PS) is positioned in the front direction of the cam 4 in the axial direction of the cam 4 by the height of the adjustment slope 5a as compared with the first ON corresponding position (PO1), the connecting body 10 and the locking body 7 slightly moves further forward from the unlock position to maintain the unlocked state.

  As described above, when the plug 3 is rotated from the lock position to the start position, the cam follower 6 starts from the first lock corresponding position (PL1) to the start corresponding position (PO1) via the first on corresponding position (PO1). PS) is moved on the first follower movement path (R1) leading to PS), and accordingly, the locking body 7 shifts from the locked state to the unlocked state, and further, the engine start operation by the ignition switch 13 is performed.

  Further, as shown in FIG. 2B and subsequent figures, a second follower movement path (R2) is provided along the first follower movement path (R1). The second follower movement path (R2) is arranged to be biased toward the rotation center of the cam 4 as compared with the first follower movement path (R1), and the first follower movement path via the introduction opening 9 is arranged. It is connected to the end of the route (R1), that is, the start corresponding position (PS).

  The introduction opening 9 is located in front of the start-corresponding position (PS) on the pressure-contacting wall surface of the cam 4 where the tip of the cap portion 6a of the cam follower 6 is pressed when the cam follower 6 moves on the first follower moving path (R1). The cam follower 6 that has been formed by cutting at the position 1 and has moved on the first follower moving path (R1) is introduced at the start corresponding position (PS) where the support by the pressure-contacting wall surface against the pressing force by the second compression spring 17 is lost. It moves to the 2nd follower movement path | route (R2) through the opening 9 (refer Fig.4 (a)).

  When the plug 3 is returned to the ON position from this state, the cam follower 6 moves on the second follower movement path (R2), and the second ON corresponding position set on the second follower movement path (R2). Move to (PO2). The second on-corresponding position (PO2) is provided with a step-like restricting portion 8 by further retracting the pressure-contacted wall surface in the direction of the rotation center, and the start corresponding position on the second follower movement path (R2). When moving from (PS) to the ON position, as shown in FIG. 4 (b), the cam follower 6 is blocked by the restricting portion 8 and restricted from moving toward the start corresponding position (PS). As a result, the plug 3 is started. The rotation operation to the position side is restricted.

  Subsequently, when the plug 3 is rotated to the lock position side, as shown in FIG. 5A, the locking portion 10 c formed by folding the front end of the coupling body 10 is engaged with the stopper 12 protruding from the plug 3. Since it stops, the movement to the back of the coupling body 10, ie, the lock position side, is restricted.

  On the other hand, the second follower movement path (R2) passes through the first lock-corresponding position (PL1) and reaches the second lock-corresponding position (PL2) located on the axial length direction line of the rotation center of the cam 4. The drive surface 5 of the second follower movement path (R2) is notched in front of the second lock corresponding position (PL2), and the connecting path (RC) continuing to the first lock corresponding position (PL1) is the cam 4 Is formed in the axial length direction of the rotation center.

  Accordingly, when the plug 3 is rotated to the lock position, the cam follower 6 reaches the front end of the connection path (RC), that is, the second lock position through the second follower movement path (R2), as described above. Since the movement of the coupling body 10 is restricted by the stopper 12 at this position, the cam follower 6 is held at the second lock position regardless of whether it is not supported by the drive surface 5 (see FIG. 4C). .

  Thereafter, when the unlocking key 11 is removed from the plug 3 in the locked position, the stopper 12 that has lost its support by the unlocking key 11 is immersed in the plug 3 by the urging force of the first compression spring 16, and as a result, the connector 10 , And the locking body 7 returns to the locked position. As the connecting body 10 moves backward to the lock position, the cam follower 6 moves rearward together with the connecting body 10 and moves to the first lock corresponding position (PL1). As shown in FIG. Return to.

  Further, the cam 4 is provided with a third follower movement path (R3) that starts from the second lock corresponding position (PL2) and is connected to the first follower movement path (R1). The movement from the first follower movement path (R1) to the third follower movement path (R3) is an introduction opening 9 that connects the first follower movement path (R1) and the second follower movement path (R2) described above. In the same manner as described above, the wall surface to be pressed by the cap portion 6a of the first follower movement path (R1) is cut before the first on-corresponding position (PO1), and the cam follower 6 is moved to the first lock corresponding position (PL1). ) Through the first follower movement path (R1) to the first on-corresponding position (PO1), the urging force of the second compression spring 17 causes the cam follower 6 to be covered by the third follower movement path (R3). It moves inward until it comes into contact with the pressure contact wall surface and moves to the third follower movement path (R3).

  Therefore, when the plug 3 is rotated from the lock position to the on position, the cam follower 6 moves on the first follower movement path (R1) to the connection site with the third follower movement path (R3). When the rotation operation is performed up to the start position, the second follower movement path (R2) is entered as described above. On the other hand, when the plug 3 is rotated to the lock position after reaching the connecting portion with the first follower movement path (R1), the cam follower 6 passes through the third follower movement path (R3) to be locked in the second position. After reaching the corresponding position (PL2), the cam follower 6 can move to the first corresponding follower movement path (R1) via the third follower movement path (R3) and move to the start corresponding position (PS). In addition, the engine can be started again by rotating the plug 3 to the start position.

  Further, even after the rotational operation once to the start position, when returning to the on position, the cam follower 6 moves to the second lock corresponding position (PL2) via the second follower movement path (R2), After that, the unlock key 11 can be moved to the start corresponding position (PS) by moving to the first follower movement path (R1) via the third follower movement path (R3) as described above. The plug 3 can be rotated to the start position without removing the plug.

DESCRIPTION OF SYMBOLS 1 Steering column 2 Frame 3 Plug 4 Cam 5 Drive surface 6 Cam follower 7 Locking body 8 Restriction part 9 Introduction opening 10 Connection body 11 Unlocking key 12 Stopper R1 1st follower movement path R2 2nd follower movement path R3 3rd Follower movement path RC connection path PL1 first lock corresponding position PL2 second lock corresponding position PO1 first on corresponding position PO2 second on corresponding position PS start corresponding position

Claims (6)

A plug inserted into a frame fixed to the steering column and rotated between a lock position, an on position, and a start position is driven by a drive surface of a cam that rotates around the same rotation axis together with the plug. With cam followers,
A locking body that follows a cam follower and protrudes from the frame and moves between a position that is locked to a steering shaft that is inserted through the steering column and a position that is received in the frame and is unlocked from the steering shaft ; Have
The cam follower is driven in the axial direction of the cam by the drive surface in accordance with the rotation operation between the lock position and the on position of the plug, and
The locking body is connected to a connecting body that moves forward and backward in the axial direction of the cam following the cam follower, and is driven between a locking position and an unlocking position with respect to the steering shaft by the forward and backward movement of the connecting body. ,
The cam follower has a first follower movement path from a first lock corresponding position corresponding to the lock position to a start corresponding position corresponding to the start position through a first on corresponding position corresponding to the on position. In addition, the second follower movement is formed so as to be deviated toward the center of the cam with respect to the first follower movement path with the start corresponding position as a starting end , and led to the second on corresponding position and the first lock corresponding position. A pathway is formed,
A steering lock device provided with a restricting portion for restricting movement of the cam follower to the start corresponding position side and preventing rotation of the plug in the corresponding direction at the second on-corresponding position.   2. The steering lock device according to claim 1, wherein the coupling body is urged in a locking direction of the locking body, is coupled to a cam follower, and presses the cam follower against the drive surface by an urging force in the locking direction. The cam follower is pressed against the wall surface of the follower moving path by appropriate biasing means,
3. The steering lock device according to claim 1, wherein the restricting portion is formed by providing a stepped protrusion that restricts movement of the cam follower toward the start corresponding position on a wall surface to be pressed by the cam follower. The cam follower is biased toward the rotation center of the cam,
4. The steering lock device according to claim 3, wherein the pressure contact wall surface by the cam follower of the first follower moving path is cut out at a start corresponding position to form an introduction opening of the cam follower to the second follower moving path. The plug is fitted with a stopper that protrudes from the plug in an unlocking key insertion state and is locked to the coupling body at the lock position to restrict movement of the lock body to the lock position.
The cam is provided with a second lock corresponding position corresponding to a restriction position by the stopper of the cam follower,
The steering lock device according to any one of claims 1 to 4, wherein the second lock-corresponding position and the first lock-corresponding position are coupled via a coupling path formed in the axial length direction of the rotation center of the cam . 6. The steering lock device according to claim 5, wherein a third follower movement path is provided that starts from the second lock corresponding position and is connected to the first follower movement path via the first on corresponding position .

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