JP6586298B2 - Steering lock device - Google Patents

Description

  The present invention relates to a steering lock device.

  A steering lock device described in Patent Document 1 is known as a steering lock device that restricts an operation to a steering by engaging a lock bar with a steering shaft.

  In this conventional example, a control bar to which a biasing force in a direction of pushing the lock bar toward the lock position is applied to the lock bar via a control peg. As shown in FIG. 16, the control bar 17 is formed with a rear portion 19 as a follower with respect to the cam surface of the rotary projecting component 18 connected to the plug, and the control bar 17, that is, the lock bar is moved along with the rotation of the plug. Operate.

  A locking pin 20 is attached to the control bar 17 while being urged in the protruding direction, and presses against the cylindrical surface 21 of the rotating protruding component 18. A locking recess 22 is recessed in the rotary projecting part 18 so as to cut the cylindrical surface 21 by a flat surface, and a rising wall-like stopper surface 23 is formed at the boundary between the cylindrical surface 21 and the locking recess 22.

  When the lock bar 5 is in the locked position, the locking pin 20 falls into the locking recess 22 and faces the stopper surface 23 so that the movement of the control bar 17 toward the unlock position is restricted. Unauthorized unlocking by operation is prevented.

Japanese Patent No. 4465072

  However, in the above-described conventional example, the stopper surface 23 is formed by cutting out the flat locking recess 22 in the cylindrical surface 21 of the rotary projecting component 18, so that the step of the stopper surface 23 is sufficiently increased. There is a problem that it is difficult to set the locking dimension with the locking pin 20 to a height sufficient to restrict the movement of the locking pin 20.

  That is, first, the locking pin 20 that has fallen into the locking recess 22 gradually shifts to the height of the cylindrical surface 21 with the rotation of the plug to the unlock position, and needs to move to the cylindrical surface 21 before the unlock position. Therefore, the boundary between the locking recess 22 and the cylindrical surface 21 needs to be set before the plug unlock position.

  On the other hand, the angle between the unlock position and the lock position of the plug is determined in advance according to the specifications of the ignition switch and the like, and further, the radial dimension of the rotary protruding part 18 is also limited, so It becomes difficult to sufficiently increase the level difference between the locking recess 22 formed on the orthogonal plane and the stopper surface 23.

  This problem can also be formed by releasing the orthogonal condition with the side wall and forming the locking recess 22 with a flat surface that is absorbed by the cylindrical surface 21 before the unlocking position with the locking position of the plug as the starting end. However, in this case, since the inclination of the locking recess 22 becomes steep, the following problem occurs.

  That is, since the locking pin 20 guided in the advancing / retreating direction and held in the control peg is always loaded with a force in a direction oblique to the guide as it moves on the locking recess 22, The locking pin 20 slides in a point contact state with a guide in the control peg.

  When the flat surface forming the locking recess 22 is formed by a steep slope, the horizontal component force applied to the locking pin 20 becomes extremely large. As a result, the pressure on the contact point increases, so that the operation feeling is only reduced. In addition, there is a possibility of causing an overall malfunction due to the occurrence of rattling due to long-term use.

  That is, in the above-described conventional example, the rocking pin 20 is detached from the locking recess 22 as shown in FIG. 16B, and after the contact with the cylindrical surface 21 is released, as shown in FIG. As described above, until the control bar 17 is locked to the claw 24 of the plug, the control bar 17 is locked to the rear surface 25 of the rotary protruding part 18 and has a function of restricting the movement of the control bar 17. When the rocking pin 20 is tilted and stops moving in the control peg due to the occurrence of rattling in the peg, and the return operation failure to the protruding position by the spring accommodated in the control peg occurs, the control bar 17, that is, the locking pin The holding function to the 20 locked position is lost.

  If the locking pin 20 is not held in the locked position, the control bar 17 can move to the unlocked position following the side lamp 26 in accordance with the rotation operation of the plug toward the locked position, and can be shifted to the locked state. Disappear.

  The present invention has been made to solve the above drawbacks, and it is an object of the present invention to provide a steering lock device that can ensure an unauthorized unlocking operation and that operates stably even during long-term use. And

According to the present invention, the object is
A cam member 2 connected to a plug 1 capable of rotating between the locking and unlocking rotation positions;
A cam follower body 4 driven between the lock and unlock positions driven by the cam surface 3 of the cam member 2 and biased toward the lock position;
A lock bar 5 connected to the cam follower body 4 to be engaged with and disengaged from the steering shaft, and moved between unlock positions;
The plug 1 is locked to the cam follower body 4 that has moved to the unlocked position as the plug 1 rotates from the locking rotation position toward the unlocking rotation position , and the cam follower body 4 is held in the unlocking position. A locking body 7 for releasing the locking with the cam follower body 4 with the removal of the key 6;
The cam follower body 4 is provided with a follower portion 13 that comes into contact with the cam surface 3 of the cam member 2 and causes the cam follower body 4 to follow the cam surface 3.
The cam follower body 4 is provided with a stopper pin 8 that is biased in the protruding direction,
The cam member 2 is formed with a pin-corresponding surface 9 which is formed of a concentric cylindrical surface at the rotation center of the cam member 2 and the tip of the stopper pin 8 faces or abuts.
Further, the pin-corresponding surface 9 is positioned on the movement path of the stopper pin 8 when the plug 1 is in the locking rotation position, and a vertical wall 10 that restricts the movement of the stopper pin 8 to the unlock position side; This is achieved by providing a steering lock device in which a stopper projection 12 provided with an inclined wall 11 allowing movement from the unlock position to the lock position side is provided.

  The steering lock device drives the lock bar 5 biased toward the lock position to the unlock position by rotating the plug 1 from the lock rotation position to the unlock rotation position using the unlock key 6. Configured.

  The drive of the lock bar 5 is performed by driving a follower portion 13 formed on the cam follower body 4 connected to the lock bar 5 by the cam surface 3 of the cam member 2 connected to the plug 1. A pin-corresponding surface 9 formed by a cylindrical surface centering on the rotation center of the cam member 2, that is, the rotation center (C1) of the plug 1 is formed.

  When the stopper pin 8 mounted on the cam follower body 4 is in contact with the pin-corresponding surface 9 or at an appropriate interval as the plug 1 is rotated, the lock bar 5 is in the locked position. The movement of the stopper pin 8 toward the unlock side is restricted by the stopper protrusion 12 protruding on the pin corresponding surface 9.

  Therefore, in the present invention, even if the lock bar 5 is directly operated and moved to the unlock position in the locked state, the movement of the cam follower body 4 connected to the lock bar 5 is caused by the interference of the stopper pin 8 with the stopper protrusion 12. It becomes impossible because it is regulated, and it is possible to reliably prevent unauthorized unlocking operations.

  Since the stopper protrusion 12 is formed on the pin corresponding surface 9 formed by the cylindrical surface, the interference dimension with the stopper protrusion 12 can be freely set. For this reason, the locking dimension with the stopper protrusion 12 when the lock bar 5 is illegally operated to the unlock position side can be made sufficiently large, and the resistance to the illegal operation is improved.

  Further, the stopper pin 8 advances and retreats toward the cam member 2, and the pin-corresponding surface 9 that the stopper pin 8 abuts or faces in a non-contact state is formed by a cylindrical surface centering on the rotation center of the cam member 2. Therefore, a large lateral load is not applied to the stopper pin 8. As a result, malfunction due to wear or the like does not occur, and stable performance can be exhibited over a long period of time.

In the present invention, the locking body 7 is configured to be locked to the cam follower body 4 as the cam follower body 4 moves to the unlock position.

  In the present invention, when the plug 1 is rotated to the unlocking rotation position and the cam follower body 4 moves to the unlocking position, the plug 1 is locked to the locking body 7 and thereafter unlocked without following the cam surface 3 of the cam member 2. Held in the locked position.

  As a result, the stopper pin 8 does not function as a follower portion for the cam member 2 at all, and is given a function only for restricting movement to the unlock position. As a result, in the conventional example described above, if the stopper pin 8 malfunctions, the basic function as the steering lock device is impaired, but in the present invention, the stopper pin 8 does not adversely affect the basic function. Therefore, stable operation over a long period of time becomes possible.

The steering lock device
The plug 1 is formed so as to be rotatable to a start rotation position exceeding the unlocking rotation position,
The cam follower body 4 is driven by the cam surface 3 with the side wall of the stopper pin 8 as a follower portion 13.
Further, the cam member 2 corresponds to the start rotation position from the first lock corresponding position (PL1) corresponding to the locking rotation position of the plug 1 through the first unlock corresponding position (PU1) corresponding to the unlocking rotation position. A first follower movement path (R1) to a start corresponding position (PS)
The second follower portion 13 formed by being deviated from the first follower movement path (R1) toward the center of the cam member 2 and leading the follower portion 13 that has passed through the start corresponding position (PS) corresponds to the unlocking rotation position of the plug 1. The second follower movement path (R2) leading to the unlock corresponding position (PU2) and the second lock corresponding position (PL2) held at the unlock position by the locking body 7 corresponding to the locking rotation position of the plug 1 )When,
A connection path (RC) for connecting the first lock corresponding position (PL1) and the second lock corresponding position (PL2) is formed,
The second follower movement path (R2) is provided with a stepped protrusion 14 for restricting the movement of the follower section 13 toward the start corresponding position (PS), and the connection path (RC) includes the stopper. The projection 12 can be provided.

  In the present invention, the plug 1 is formed so that it can be rotated to the start rotation position beyond the unlocking rotation position where the movement of the lock bar 5 to the unlock position is completed. After the plug 1 is shifted from the locking rotation position to the unlocking rotation position and the start rotation position, the cam 1 is returned to the locking rotation position again via the unlocking rotation position, and the unlocking key 6 is removed at the locking rotation position. The stopper pin 8 that also serves as the follower portion 13 for the start position is passed through the first and second follower movement paths (R1, R2) and the connection path (RC) while the free end travels on the follower travel surface. Return to.

  The first follower movement path (R1) starts from the first lock corresponding position (PL1) in which the plug 1 is in the locking rotation position and the lock bar 5, that is, the cam follower body 4 is in the lock position. 1 is a path whose end point is the start corresponding position (PS) at the start rotation position, and the cam follower body 4 is a first unlock corresponding position (PU1) set in the middle of the first follower movement path (R1). In FIG. 1, the motor is driven from the locked position to the unlocked position.

  The second follower movement path (R2) through which the follower portion 13 that has moved to the start corresponding position (PS) is guided is formed in a biased direction toward the center of the cam member 2 with respect to the first follower movement path (R1). The When the stopper pin that constitutes the follower portion 13 and is biased in the protruding direction reaches the end of the first follower movement path (R1), that is, the start corresponding position (PS), the second follower movement path is caused by the biasing force. (R2) moves to the pin-corresponding surface 9, and thereafter the return to the first follower movement path (R1) is restricted.

  The second follower movement path (R2) is a path starting from the start corresponding position (PS) and ending at the second lock corresponding position (PL2) where the plug 1 returns to the locking rotation position. The cam follower body 4 locked to the locking body 7 in the follower movement path (R1) is held at the unlock position over the entire area of the second follower movement path (R2).

  In the second follower movement path (R2), a second unlock corresponding position (PU2) where the plug 1 has reached the unlocking rotation position is disposed in the middle of the path, and the stopper pin 8 is positioned in the second unlock corresponding position ( When moving to the PU2), the stepped protrusion 14 formed on the pin movement path is overcome, and thereafter the return to the start corresponding position (PS) is restricted.

  As a result, since the rotation operation to the start rotation position is once performed, the engine is started up and the plug 1 is returned to the unlocking rotation position, the rotation operation to the plug 1 returning to the start rotation position again is prohibited. It is possible to reliably prevent a restart operation or the like on an engine that has already been started.

  Further, the stopper projection 12 protruding from the pin corresponding surface 9 of the connection path (RC) directly operates the lock bar 5 in the locked state in order to restrict the movement of the cam follower body 4 from the locked state to the unlocked state. Thus, it is possible to reliably prevent an unauthorized operation to unlock.

Furthermore, as another aspect of the present invention for achieving the above object,
The cam follower body 4 is connected to the lock bar 5 at one end and a steering lock device formed by providing a follower main body portion 15 holding the stopper pin 8 at the opposite end and an engaging / disengaging portion 16 to the locking body 7. Can be configured.

  In the present invention, the cam follower body 4 has a follower body portion 15 in which a connecting portion to the lock bar 5 and a holding portion for the stopper pin 8 are arranged at both ends, and the connecting portion to the stopper pin 8 and the lock bar 5 is Separated.

  In the above-described conventional example, since the lock bar 5 and the cam follower body 4 are connected to each other via the stopper pin 8, the lock bar 5 and the cam follower body 4 need to be arranged in a straight line, and the layout is free. However, in the present invention in which the lock bar 5 is directly connected to the cam follower body 4, the relative position between the cam follower body 4 and the lock bar 5 can be appropriately determined. Get higher.

  In this case, if the steering lock device is configured in which the advancing / retreating direction of the lock bar 5 is arranged to intersect the axis of the plug 1, the stroke of the cam follower body 4 can be made shorter than the advancing / retreating stroke of the lock bar 5. Therefore, the apparatus can be miniaturized.

  According to the present invention, since the protrusion height of the stopper protrusion can be increased as necessary, resistance to unauthorized operation can be increased.

It is sectional drawing which shows this invention. It is a figure which shows a cam member, (a) is a figure which shows the rotation angle of a plug, (b) is a front view of a cam member, (c) is a side view of a cam, (d) is a rear view of a cam. It is a figure which shows operation | movement of a steering lock apparatus, (a) is a figure which shows the state which rotated the plug to the unlocking rotation position, (b) is a figure which shows the state which rotated the plug to the locking rotation position. It is a figure which shows a cam follower body, (a) is a front view, (b) is a 4B-4B line sectional view of (a), (c) is a rear view, (d) is a 4D direction arrow view of (c). is there. It is a figure which shows operation | movement of a cam member and a cam follower body, (a) is a side view which shows the movement of a follower part with respect to a cam member, (b) is a front view of (a). FIG. 4 is a cross-sectional view of the main part showing the operation of the stopper protrusion, where (a) shows the positional relationship with the stopper pin in the locked state, and (b) shows the positional relationship with the stopper pin when the lock bar is operated improperly. is there. It is sectional drawing which shows other embodiment of this invention. It is a figure which shows a cam member, (a) is a perspective view of a cam member, (b) is a front view of a cam member. It is a figure which shows operation | movement of a cam member, (a) is a 9A direction arrow directional view of FIG.8 (b), (b) is a 9B direction arrow directional view of FIG.9 (a). It is a figure which shows the relationship between the stopper pin and cam member in a locking rotation position. It is sectional drawing corresponding to FIG. 7 in an unlocking rotation position. It is a figure which shows the state which rotated the plug to the unlocking rotation position. It is a figure which shows the state which rotated the plug, (a) is sectional drawing which shows a start rotation position, (b) is sectional drawing which shows the state rotated from the start position to the unlocking house position. It is a figure which shows the state which rotated the plug, (a) is sectional drawing which shows the state rotated from the start rotation position to the locking rotation position, (d) is a cross section which shows the state which extracted the unlocking key in the locking rotation position FIG. It is a figure which shows the steering lock apparatus in a locking rotation 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. FIG. 5A is a perspective view of a rotating projecting part, FIG. 5B is a diagram showing a relative position before completion of locking with a control bar claw, and FIG. It is a figure which shows a stop completion state.

  As shown in FIG. 1, the steering lock device includes a cylinder lock 28 housed in a frame 27, a cam member 2, a cam follower body 4, and a lock bar 5, and the frame 27 is fixed to a steering column 29. Used. An ignition switch 30 is connected to the frame 27, and a rotational operation force is transmitted to the cylinder lock 28 via a gear 30 a that meshes with a bevel gear-shaped gear portion 2 a formed on the cam member 2.

  The cylinder lock 28 is formed by inserting the plug 1 into the cylinder case 28a, and the plug 1 can be rotated with respect to the cylinder case 28a, that is, the frame 27 with the genuine unlocking key 6 inserted. . A key detection block 31 that is movable in the radial direction of the plug 1 and protrudes from the outer periphery of the plug 1 with the unlock key 6 inserted is attached to the tip of the plug 1.

  As shown in FIG. 2A, the plug 1 can be rotated between a lock position corresponding to the lock rotation position, an on position corresponding to the unlock rotation position, and a start rotation position. When the plug 1 is in the locked position, as shown in FIG. 1, the plug 1 protrudes from the frame 27 and engages with a steering shaft (not shown) inserted through the steering column 29 to rotate the steering shaft. It is held at the lock position to be regulated. When the plug 1 is rotated from this state to the on position, the lock bar 5 is moved to an unlock position where the lock bar 5 is accommodated in the frame 27 and unlocked from the steering shaft, as shown in FIG. When the plug 1 is rotated from this state to the start position, the ignition switch 30 is moved from the on position to the start position while the lock bar 5 is held in the unlock position, and the starter switch is operated to perform the engine start operation. Is called.

  The cam follower body 4 is a member that is long in the axial length direction of the rotation shaft (C1) of the plug 1 and moves along the axial length direction to the plug 1 to transmit the rotation operation of the plug 1 to the lock bar 5. As shown in FIG. 4, the cam follower body 4 is formed by projecting an engaging / disengaging portion 16 from the front end of the follower main body portion 15. The follower body 15 has a bar connection opening 15a at the rear end, and the lock bar 5 is connected to the bar connection opening 15a by locking the connection locking portion 5a.

  In order to allow sliding of the lock bar 5 that intersects the sliding direction of the cam follower body 4, that is, the axial length direction of the rotation center (C 1) of the plug 1 at a predetermined angle, 5a is formed in a hook shape with one end open. Further, a biasing force in the lock position direction is applied to the lock bar 5 by the compression spring 32, and a back biasing force is also applied to the cam follower body 4 connected to the lock bar 5.

  Further, a follower portion 13 is provided at the front end portion of the follower body portion 15, and the stopper pin 8 is held by the follower portion 13. The follower portion 13 is formed in a triangular shape with the top portion directed rearward, and the stopper pin 8 is urged in a protruding direction by a pin compression spring 8a (see FIG. 4B).

  On the other hand, the cam member 2 is formed in a cylindrical shape and is connected to the rear end of the plug 1 and rotates around the same rotation axis together with the plug 1. As described above, the gear portion 2a that meshes with the gear 30a of the ignition switch 30 is formed in the substantially half circumferential area of the cam member 2, and the cam surface 3 is formed by using the remaining half circumferential portion. .

  As shown in FIG. 2, the cam surface 3 is formed along a cylindrical pin-corresponding surface 9 with the rotation axis (C1) as the center, and is formed in a step shape that opens forward.

  As shown in FIG. 5, the cam member 2 and the cam follower body 4 are arranged such that the stopper pin 8 of the cam follower body 4 moves along the rotation center of the cam member 2, that is, the rotation center (C 1) of the plug 1. The follower portion 13 of the cam follower body 4 is disposed on the movement locus of the cam surface 3.

  As shown in FIG. 5, when the plug 1 is in the locking rotation position, the follower portion 13 of the cam follower body 4 is in the lock corresponding position (PL), and from this state the plug 1 is moved to the unlocking rotation position (hereinafter referred to as the “on position”). When the rotation operation is performed in the direction ")", the follower portion 13 is pulled up to the flat portion (3b) of the cam surface 3 along the inclined portion 3a of the cam surface 3 and moves to the unlock position (PU) until reaching the ON position. To do. The cam follower body 4 urged to the lock position side in accordance with the movement to the unlock corresponding position (PU) and the lock bar 5 coupled thereto are driven to the unlock position against the urging force. Thereafter, when the plug 1 is rotated to the start rotation position, the follower portion 13 moves on the flat portion 3b of the cam surface 3 and moves to the start corresponding position (PS).

  The follower portion 13 is indicated by a black dot in FIG. 5A and a bold straight line in FIG. 5B.

  Further, the protruding height of the stopper pin 8 is set such that the tip is slightly in contact with the pin-corresponding surface 9 of the cam member 2, and as shown in FIG. , And moves relative to the pin corresponding surface 9 while keeping the relative position constant.

  In the above description, the stopper pin 8 is set to have a protruding height that contacts the pin-corresponding surface 9. However, the stopper pin 8 can be pressed against the pin-corresponding surface 9 or set to a non-contact state. .

  Further, a stopper projection 12 is projected from the pin corresponding surface 9 of the cam member 2. As shown in FIG. 5, the stopper protrusion 12 is disposed on the movement path of the stopper pin 8 of the cam follower body 4 when the cam member 2 is in the locking rotation position. As shown in FIG. 6, the stopper projection 12 includes a vertical wall 10 that stands upright from the pin-corresponding surface 9, and an inclined wall 11 that gradually decreases in height from the top of the vertical wall 10 toward the front. Formed.

  When the plug 1 is in the locking rotation position and the cam follower body 4 is in the locking position, the stopper pin 8 is positioned behind the vertical wall 10 of the stopper projection 12 as shown in FIG. As shown in b), the forward movement is restricted. As a result, since it becomes impossible to directly operate the lock bar 5 and move it to the unlock position side, resistance to unauthorized unlocking is improved.

  Further, the locking body 7 is attached to the frame 27. As shown in FIG. 1, the locking body 7 includes a detection hook portion 7 a at the front end and a locking hook portion 7 b that engages with and disengages from the engagement and disengagement portion 16 of the cam follower body 4 at the rear end. It is arranged along the axial length direction of (C1).

  The locking body 7 is urged clockwise in FIG. 1 by an urging means (not shown) and can swing freely with an intermediate portion as a fulcrum. As shown in FIG. As shown in FIG. 3, the detection hook portion 7 a moves between the locking release posture immersed in the plug 1 and the locking posture pushed out of the plug 1.

  Further, the swinging fulcrum 7c of the locking body 7 is configured as a movable fulcrum that can move a minute distance in the direction of the arrow (D7) in FIG. 1, and is held at the position of FIG.

  Therefore, in this example, when the plug 1 is in the locking rotation position and the unlocking key 6 is not inserted, the lock bar 5 is held in the locking position by the urging force of the compression spring 32 as shown in FIG. As described above, it is prohibited to directly operate the lock bar 5 in this state and move it in the unlock position direction (see FIG. 6B).

  From this state, when the unlocking key 6 is inserted into the plug 1, the locking body 7 shifts to the locking posture as the detection hook portion 7 a is pushed out of the plug 1. Thereafter, when the plug 1 is rotated to the on position side, as described above, the cam follower body 4 is driven forward by the cam member 2, and the engagement / disengagement portion 16 contacts the engagement hook portion 7 b of the engagement body 7. Touch. When the rotation operation of the plug 1 is further continued from this state, the locking hook portion 7b is pushed by the guide inclined surface 16a formed at the front end of the engagement / disengagement portion 16, and a lateral force is applied to the locking body 7. Generates a moment with the contact point between the detection hook 7a and the plug 1 side wall as the center of rotation.

  Due to this moment, the swing fulcrum 7c of the cam follower body 4 moves once against the urging force to receive the engaging / disengaging portion 16 in the locking hook portion 7b, and then the swing fulcrum 7c returns to the original position. Thus, the locking body 7 and the cam follower body 4 are kept in a connected state thereafter (see FIG. 3A).

  The above-described engagement between the locking body 7 and the cam follower body 4 is performed immediately before the plug 1 reaches the on position, and then the cam follower body 4 at the on position shown in FIG. The lock bar 5 is held in the unlock position.

  Next, when the plug 1 is returned from the ON position to the locking rotation position, as shown in FIG. 5B, the cam follower body 4 loses the return drag to the lock position by the cam surface 3, but the locking body 7 and Is maintained in the unlocked position (see FIG. 3B).

  Thereafter, when the unlocking key 6 is removed, the key detection block 31 is immersed in the plug 1 by the urging force of the locking body 7 in the rotational direction, and the locking body 7 is rotated around the swing center 7c in FIG. It rotates clockwise and the locking with the cam follower body 4 is released.

  On the other hand, as shown in FIG. 3B, the stopper pin 8 is inclined to the cam member 2 with the inclined wall 11 in a state where the plug 1 is rotated to the lock rotation position by the unlocking key 6. Therefore, the unlocking key 6 is removed and the locking with the locking body 7 is released, and the locking force side is released by the restoring force of the compression spring 32. The cam follower body 4 urged by is moved to the lock position and returns to the state shown in FIG.

  FIG. 7 and below show another embodiment of the present invention. In the following description of the embodiment, components that are substantially the same as those of the above-described embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted.

  In this example, the cam follower body 4 is formed in a plate shape and is arranged to be movable in the front-rear direction along the rotation center of the plug 1, and is provided by a compression spring 32 interposed between the cam follower body 4 and the frame 27. It is biased toward the lock position.

  The front end portion of the cam follower body 4 is bent toward the plug 1 to form an engaging / disengaging portion 16, and a locking body 7 that engages / disengages the engaging / disengaging portion 16 is disposed in the plug 1, and an unlocking key 6 to the plug 1 is provided. It protrudes out of the plug 1 by insertion.

  Further, the stopper pin 8 in this example is guided by a guide groove 27 a provided in the frame 27 and connected to the cam follower body 4, and the side wall portion is used as the follower portion 13.

  As shown in FIGS. 8 and 9, the cam member 2 has first and second follower movement paths (R1, R2) recessed in the front surface of the cylindrical body and a connection path (RC). Thus, a pin corresponding surface 9 made of a cylindrical surface is formed perpendicular to each movement path. A stopper protrusion 12 having an inclined wall 11 at the front and a vertical wall 10 at the rear is projected from the connection path (RC).

  The first follower movement path (R1) is a movement path from the first lock corresponding position (PL1) to the start corresponding position (PS) via the first unlock corresponding position (PU1), as shown in FIG. Thus, when the plug 1 is in the lock rotation position and the cam follower body 4 is in the lock position, the follower portion 13 of the cam follower body 4, that is, the stopper pin 8, is held at the first lock corresponding position (PL1) in FIGS. Is done.

  As shown in FIG. 8, the moving path from the first lock corresponding position (PL1) to the first unlock corresponding position (PU1) is provided with an inclined portion 3a that gradually moves forward as the cam member 2 rotates. When the plug 1 is rotated from the locking rotation position to the on position, the stopper pin 8 moves on the movement path while pressing the tip against the corresponding pin corresponding surface 9, and the first unlock corresponding position (PU1 shown in FIG. 12). ). On the other hand, as the stopper pin 8 moves in the longitudinal direction, the lock bar 5 moves to the unlock position and is held at the position as shown in FIG.

  When the plug 1 is further rotated from the ON position to the start rotation position, the stopper pin 8 moves to the start corresponding position (PS) via the adjustment slope 3c. Since the start corresponding position (PS) is located in the front direction in the axial direction of the cam member 2 by the height of the adjustment slope 3c compared to the first unlock corresponding position (PU1), the cam follower body 4, The lock bar 5 moves slightly further forward from the unlock position to maintain the unlocked state.

  As described above, when the plug 1 is rotated from the locked rotation position to the start rotation position, the stopper pin 8 passes from the first lock corresponding position (PL1) to the first unlock corresponding position (PU1). The lock bar 5 moves from the locked state to the unlocked state along with the movement of the first follower moving path (R1) to the start corresponding position (PS). Further, the engine start operation by the ignition switch 30 is performed. Is called.

  On the other hand, the second follower movement path (R2) is arranged so as to be biased toward the rotation center direction of the cam member 2 as compared with the first follower movement path (R1), and the first follower movement path (R2) is arranged via the introduction opening 3d. To the end of the follower movement path (R1), that is, the start corresponding position (PS).

  The introduction opening 3d allows the pin corresponding surface 9 of the cam member 2 to which the tip of the stopper pin 8 is pressed when the stopper pin 8 moves on the first follower movement path (R1) before the start corresponding position (PS). The stopper pin 8 that has been formed by cutting at the first step and moved on the first follower moving path (R1) loses the support by the pin corresponding surface 9 against the pressing force of the pin compression spring 8a. In FIG. 13 (a) through the introduction opening 3d to the second follower movement path (R2).

  The second follower movement path (R2) is a path from the start corresponding position (PS) introduced from the introduction opening 3d to the second lock corresponding position (PL2) through the second unlock corresponding position (PU2). In the second unlock corresponding position (PU2), the stepped protrusion 14 is protruded by further retracting the pin corresponding surface 9 toward the center of rotation.

  Therefore, when the plug 1 is returned from the start rotation position to the on rotation position, the stopper pin 8 moves on the second follower movement path (R2) and is set on the second follower movement path (R2). Move to the second unlock position (PU2). Once the stopper pin 8 reaches the second unlock corresponding position (PU2), as shown in FIG. 13B, the movement toward the start corresponding position (PS) side is restricted by the protrusion 14 as a result. The rotation operation to the start position side of the plug 1 is restricted, and the restart operation to the already started engine can be prevented.

  Thereafter, when the plug 1 is rotated to the locking rotation position side, as shown in FIG. 15A, the connecting body 7 held at the position protruding from the plug 1 by the insertion of the unlocking key 6 is formed by the cam surface 3. Before the restraint is released, the cam follower body 4 is engaged with the engagement / disengagement portion 16 to restrict the movement of the cam follower body 4 to the rear side, that is, the lock position side.

  Further, the second lock corresponding position (PL2) of the second follower movement path (R2) is set in front of the first lock corresponding position (PL1), and the cam of the second follower movement path (R2). The surface 3 is notched in front of the second lock corresponding position (PL2), and a connection path (RC) continuing to the first lock corresponding position (PL1) is formed in the axial length direction of the rotation center of the cam member 2. .

  Accordingly, when the plug 1 is rotated to the locking rotation position, the stopper pin 8 reaches the front end of the connection path (RC), that is, the second lock corresponding position (PL2) through the second follower movement path (R2). However, as described above, since the movement of the cam follower body 4 is restricted by the locking body 7 at this position, the stopper pin 8 is not supported by the cam surface 3, but the second lock corresponding position (PL2 (See FIG. 14A).

  Thereafter, when the unlocking key 6 is removed from the plug 1 in the unlocking rotation position, the locking body 7 that has lost its support by the unlocking key 6 is inserted into the plug 1 by the component force in the immersion direction generated on the front inclined surface 7d. As a result, the cam follower body 4 and the lock bar 5 return to the lock position. As the cam follower body 4 moves backward to the lock position, the stopper pin 8 moves rearward together with the cam follower body 4 and moves to the first lock corresponding position (PL1), as shown in FIG. 15 (b). Return to the state.

  As shown in FIG. 15A, when the plug 1 is rotated to the locking rotation position and the stopper pin 8 is in the second lock corresponding position (PL2), the stopper protrusion 12 of the cam member 2 is behind the stopper pin 8. The stopper wall 8 is allowed to move backward.

  On the other hand, as shown in FIG. 15B, when the stopper pin 8 moves to the first lock corresponding position (PL1), the stopper projection 12 causes the vertical wall 10 to face the front of the stopper pin 8 to stop the stopper pin 8. Since the forward movement of the lock bar 5 is restricted, unauthorized unlocking operation by direct operation of the lock bar 5 can be prevented.

  Further, the cam member 2 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 the introduction opening 3d that connects the first follower movement path (R1) and the second follower movement path (R2) described above. In the same manner as above, the pin corresponding surface 9 of the first follower movement path (R1) is cut before the first unlock corresponding position (PU1), and the stopper pin 8 is formed in the first lock corresponding position (PL1). When passing through the first follower movement path (R1) to the first unlock corresponding position (PU1), the stopper pin 8 is moved along the third follower movement path (R3) by the urging force of the pin compression spring 8a. It moves inward until it comes into contact with the pin corresponding surface 9 and moves to the third follower movement path (R3).

  Accordingly, when the plug 1 is rotated from the locking rotation position to the on position, the stopper pin 8 moves on the first follower movement path (R1) to the connection portion with the third follower movement path (R3). Thereafter, when the rotation operation is performed to the start rotation position, the second follower movement route (R2) is entered as described above. On the other hand, when the plug 1 is rotated to the locking rotation position after reaching the connecting portion with the first follower movement path (R1), the stopper pin 8 passes through the third follower movement path (R3). After reaching the 2 lock corresponding position (PL2), the stopper pin 8 moves to the first follower moving path (R1) via the third follower moving path (R3) and reaches the start corresponding position (PS). Since it can move, the engine 1 can be started again by rotating the plug 1 to the start rotational position.

  Further, even after the rotational operation once to the start rotational position, when returning to the ON position, the stopper pin 8 moves to the second lock corresponding position (PL2) via the second follower movement path (R2). After that, as described above, it is possible to move to the first follower movement path (R1) via the third follower movement path (R3) and move to the start corresponding position (PS). The plug 1 can be rotated to the start rotation position without removing the key 6.

DESCRIPTION OF SYMBOLS 1 Plug 2 Cam member 3 Cam surface 4 Cam follower body 5 Lock bar 6 Unlocking key 7 Locking body 8 Stopper pin 9 Pin corresponding surface 10 Vertical wall 11 Inclined wall 12 Stopper protrusion 13 Follower part 14 Projection part 15 Follower body part 16 Engagement Departing part PL1 First lock corresponding position PL2 Second lock corresponding position PU1 First unlock corresponding position PU2 Second unlock corresponding position PS Start corresponding position R1 First follower moving path R2 Second follower moving path RC Connection path

Claims (3)

A cam member connected to a plug capable of rotating between the locking and unlocking rotation positions;
A cam follower body driven between the lock and unlock positions driven by the cam surface of the cam member and biased toward the lock position;
A lock bar that is connected to the cam follower body and is engaged with and disengaged from the steering shaft; a lock bar that moves between unlock positions;
To lock the cam follower body that has moved to the unlocked position as the plug rotates from the locking rotation position toward the unlocking rotation position, hold the cam follower body in the unlocked position, and remove the unlocking key from the plug. With a locking body that releases the locking with the cam follower body,
The cam follower body is provided with a follower portion that contacts the cam surface of the cam member and moves the cam follower body according to the cam surface.
The cam follower body is provided with a stopper pin that is biased in the protruding direction,
The cam member is formed of a cylindrical surface concentric with the rotation center of the cam member, and a pin-corresponding surface is formed on which the tip of the stopper pin faces or abuts.
In addition, the pin-corresponding surface is positioned on the stopper pin movement path when the plug is in the locking rotation position, and the vertical wall that restricts the movement of the stopper pin to the unlock position side is locked from the unlock position. A steering lock device in which a stopper projection having an inclined wall that allows movement to a position side is provided. 2. The steering lock device according to claim 1 , wherein the cam follower body is connected to a lock bar at one end, and a follower main body portion holding the stopper pin at the opposite end is provided with an engaging / disengaging portion to the locking body. The steering lock device according to claim 2, wherein the advancing / retreating direction of the lock bar is arranged to intersect with the axis of the plug.

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