JP6168694B2 - Steering lock device - Google Patents

Description

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

  The vehicle is provided with a steering lock device for locking the rotation of the steering wheel during parking for the purpose of preventing theft. In such a steering lock device, in order to prevent the release of the steering lock due to the destructive action, when the steering lock device is broken, the lock bolt that engages the steering shaft is held in the lock position to prevent the lock of the lock bolt. A device having a deadlock mechanism that disables operation has been proposed (see, for example, Patent Document 1).

  Here, an example of the steering lock device provided with the deadlock mechanism is shown in FIG.

  That is, FIG. 8 is a cross-sectional view showing a locked state of a conventional steering lock device having a deadlock mechanism. In the illustrated steering lock device 101, reference numeral 102 denotes a metal made fixed to a steering column (not shown) on the vehicle body side. A second body 103 made of resin is fastened to the lower portion of the first body 102 with screws or the like, and an opening of the second body 103 is covered with a lid 104 made of resin. Yes. A lock bolt 105 is inserted in and accommodated in an operation hole 102a that is vertically penetrated through the first body 102 so as to be movable up and down. The lock bolt 105 moves (moves up and down) between a lock position where the lock bolt 105 is engaged with an engagement groove 130a formed on a part of the outer periphery of the steering shaft 130 and an unlock position where the engagement is released. Can do.

  In addition, a rectangular groove-shaped engaging recess 105 a is formed at an intermediate height position on the outer periphery of the lock bolt 105, and a lateral groove-shaped connection recess 105 b is provided in the lower end portion of the lock bolt 105 so as to penetrate in the lateral direction. Has been.

  On the other hand, in the storage space covered by the lid 104 of the second body 103, the hanger 110 whose upper end is connected to the lower end of the lock bolt 105, and the hanger 110 to the locked position or unlocked position. A camshaft 111 constituting an operating mechanism that moves (moves up and down), and a spring 112 that biases the hanger 110 and the lock bolt 105 upward (in the lock position direction) are housed.

  The hanger 110 is stored vertically in the storage space in the second body 103, and a connecting projection 110 a formed at the upper end of the hanger 110 is engaged with the connecting recess 105 b provided through the lower end of the lock bolt 105. By joining, the upper end part is connected to the lower end part of the lock bolt 105. The hanger 110 and the lock bolt 105 are biased upward (in the lock position direction) by the spring 112 that is compressed between the lower end of the hanger 110 and the inner bottom surface of the second body 103.

  Further, the cam shaft 111 constituting the operating mechanism is long in the direction perpendicular to the paper surface of FIG. 8, and a cam 111a is integrally formed in a part thereof. The cam 111 a is engaged with a cam portion 110 b provided at the lower end portion of the hanger 110. Here, the camshaft 111 rotates together with the key cylinder when the driver inserts a key into a key hole (not shown) of the key cylinder and turns it, and the cam 111a formed integrally therewith is hanger. By acting on the cam portion 110b provided at the lower end portion of 110, the hanger 110 and the lock bolt 105 connected thereto are moved up and down to move the lock bolt 105 to the locked position or the unlocked position.

  By the way, the illustrated steering lock device 101 includes the lock bolt 105 even when the vehicle is parked in the state where the lock bolt 105 is in the locked position shown in FIG. Is provided with a deadlock mechanism for holding at a locked position. This deadlock mechanism is engaged with and disengaged from a lock plate 117 slidably fitted in a lateral groove-like fitting groove 102 b formed in the first body 102 and a circular hole 117 a formed in the lock plate 117. The holding pin 118 that is long in the vertical direction and a spring 119 that biases the holding pin 118 downward are configured.

The lock plate 117 is slidable in the fitting groove 102b of the first body 102 in the direction perpendicular to the plane of FIG. 8, and the planar shape thereof includes a narrow portion having a circular hole 117a, and the narrow portion. 8 is provided with a wide portion (not shown) that is located on the front side of the sheet in FIG. 8 and is wider than the narrow portion. The lock plate 117 is urged toward the front side of FIG. 8 by urging means (not shown) such as a spring.

  In addition, the hold pin 118 is inserted and held in the first body 102 and the second body 103 so as to be movable up and down, and in the normal state shown in FIG. The illustrated state is maintained by abutting against the engaging rib 104e, and the upper end of the engaging rib 104e passes through the hole 117a of the lock plate 117 to prevent the lock plate 117 from moving. In this state, the lock plate 117 is in a free position where it is buried in the fitting groove 102b of the first body 102 and does not protrude into the operation hole 102a, so that the lock plate 117 is engaged with the engagement recess 105a of the lock bolt 105. The lock bolt 105 can move freely between the locked position and the unlocked position without matching.

  By the way, since the vehicle is parked and the lock bolt 105 is in the locked position as shown in FIG. 8 and the rotation of the steering shaft 130 is locked, the second body 103 is removed for the purpose of theft. In this case, since the engagement between the lower end portion of the hold pin 118 and the engagement rib 104e of the lid 104 is released, the hold pin 118 is moved downward by the urging force of the spring 119. Then, since the upper end portion of the hold pin 118 comes out of the hole 117a of the lock plate 117, the lock plate 117 moves in the fitting groove 102b of the first body 102 to the back side in FIG. Slide.

  As described above, when the lock plate 117 slides to the back side in FIG. 8, a part (wide portion) of the lock plate 117 is moved from the fitting groove 102b toward the lock bolt 105 (perpendicular to the moving direction of the lock bolt 105). The lock bolt 105 is engaged with the engaging recess 105a of the lock bolt 105, the movement of the lock bolt 105 in the unlock position direction is prevented, and the lock bolt 105 is held in the lock position. For this reason, the steering state of the steering shaft 130 is maintained, and the steering operation cannot be performed, thereby preventing the vehicle from being stolen.

  The reason that the second body 103 is made of resin is to reduce the weight, and the deterioration of the anti-theft property due to the second body 103 being made of resin is compensated by the deadlock mechanism.

Japanese Patent Laid-Open No. 7-032973

  However, as shown in FIG. 9, when the second body 103 is struck from the side for the purpose of theft and the second body 103 receives a strong impact from the side, the first body 102 has a steering column on the vehicle body side. The second body 103 is separated so as to rotate with respect to the first body 102 with a point C on the opposite side to the side on which the impact is applied as a fulcrum. At this time, since the point C and the point B (the connection point between the lock bolt 105 and the hanger 110) are separated, the hanger 110 is pushed down with the rotation of the second body 103 with the point C as a fulcrum, The lock bolt 105 pulled by the hanger 110 moves in the unlock position direction (downward in FIG. 9). The amount of movement of the lock bolt 105 is proportional to the distance between point B and point C, and after the lock bolt 105 has moved slightly in the unlock position direction, the engagement with the engagement rib 104e of the hold pin 118 is released. Even if the deadlock mechanism is activated, the lock plate 117 does not engage with the engagement recess 105a as shown in FIG. 9 because the positions of the lock plate 117 and the engagement recess 105a of the lock bolt 105 are shifted. There is. In this case, since the lock bolt 105 can be operated from the locked position to the unlocked position, the locked state of the lock bolt 105 is not maintained, and the steering lock can be released, thereby reducing theft prevention performance. May occur.

  The present invention has been made in view of the above problems, and a purpose of the invention is to provide a steering lock device capable of enhancing theft prevention by reliably operating a deadlock mechanism against a destructive action. is there.

In order to achieve the above object, the invention according to claim 1
A first body that contains a lock bolt that is fixed to the vehicle body and is movable between a lock position that engages with the steering shaft and an unlock position that releases the engagement;
A second body comprising a hanger fixed to the first body and connected to the lock bolt; and an operating mechanism for moving the hanger to a locked position or an unlocked position;
The first body is slidably held in a hold pin inserted and held movably along the movement direction of the lock bolt and a fitting groove formed in a direction perpendicular to the movement direction of the hold pin. A deadlock mechanism that includes a lock plate that engages and disengages the hold pin, and that locks the lock bolt in a lock position by sliding the lock plate and engaging the lock bolt in conjunction with the movement of the hold pin. When,
In the steering lock device with
A first fixing portion for fixing the second body to the first body;
A second fixing portion that rotatably supports the second body with respect to the first body when the first fixing portion is broken;
And the center of rotation of the second body in the second fixing portion and the connection point between the lock bolt and the hanger at the lock position are substantially coincident with each other.

According to a second aspect of the present invention, in the first aspect of the invention, the second fixing portion is a spherical ball having a storage portion that is provided in the first body and stores the lock bolt therein so that the lock bolt can be moved forward and backward. A joint and a concave spherical mounting recess provided on the second body for rotatably holding the ball joint;
A connection point between the lock bolt and the hanger at the lock position is arranged at a substantially central position of the ball joint.

According to a third aspect of the present invention, in the second aspect of the present invention, the first fixing portion includes a locking portion provided in one of the ball joint and the mounting recess, and a second portion provided in the engagement portion. A locking hole into which the stopper is fitted,
The locking portion is configured to be deformable or movable by an impact on the second body.

  According to the first aspect of the present invention, when the first fixing portion is broken because the second body receives a strong impact from the side portion, the second body is rotated with respect to the first body by the second fixing portion. Held possible. At this time, since the rotation center of the second body is substantially coincident with the connection point between the lock bolt and the hanger at the lock position, only the hanger is rotated even if the second body rotates with respect to the first body. However, the movement of the lock bolt toward the unlock position is suppressed by being pulled by the hanger of the lock bolt. For this reason, even when the deadlock mechanism is activated by the rotational movement of the second body, the deadlock mechanism can reliably hold the lock bolt in the locked position, and the steering shaft (steering wheel) can be rotated. This prevents the vehicle from being stolen.

  According to the second aspect of the present invention, since the first body and the second body are connected by the ball joint, no matter which direction the impact is applied to the second body, the rotation center of the second body And the shift | offset | difference of the position of the connection point of a lock volt | bolt and a hanger is suppressed, and the movement to the unlock position direction of the lock volt | bolt by being pulled with a hanger is suppressed. As a result, the deadlock mechanism can be operated more reliably and the lock bolt can be held in the locked position.

  According to the invention of claim 3, the second body is fixed to the first body by fitting the locking portion into the locking hole. However, when a large impact is applied to the second body from the outside, Since the stop portion is deformed or moved and the engagement between the lock portion and the lock hole is released, the fixation of the second body to the first body is released, and the deadlock mechanism operates reliably. Thus, the 1st fixed part can be constituted by simple composition by the latching part and latching hole which mutually fit.

It is a side view of the steering lock device concerning the present invention. It is sectional drawing of the steering lock apparatus which concerns on this invention. 1 is an exploded perspective view of a steering lock device according to the present invention. FIG. 2 is a cross-sectional view (locked state) taken along line AA in FIG. It is the sectional view on the AA line of FIG. 1 (unlocked state). It is sectional drawing which shows the effect | action of a deadlock mechanism when the steering lock apparatus which concerns on this invention receives destruction. It is a fragmentary sectional view showing the modification of the steering lock device concerning the present invention. It is sectional drawing which shows the locked state of the conventional steering lock apparatus. It is sectional drawing explaining the problem when the 2nd body of the conventional steering lock apparatus receives the impact from the outside.

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

  1 is a side view of a steering lock device according to the present invention, FIG. 2 is a sectional view of the steering lock device, FIG. 3 is an exploded perspective view of the steering lock device, and FIG. 4 is a sectional view taken along line AA in FIG. 5 is a cross-sectional view taken along the line AA in FIG. 1 (unlocked state), and FIG. 6 is a cross-sectional view illustrating the operation of the deadlock mechanism when the steering lock device according to the present invention is subjected to destruction. is there.

  A steering lock device 1 according to the present invention locks / unlocks the rotation of a steering wheel (not shown) in conjunction with a turning operation of a key for starting an engine. The first body 2 made of metal fixed to a steering column (not shown) on the vehicle body side, and the second body 3 made of resin fastened to the lower portion of the first body 2 are provided. The opening is also covered with a resin lid 4.

  As shown in FIGS. 2 and 4 to 6, the first body 2 is provided with an operation hole 2 a extending vertically, and a lock bolt 5 is inserted into the operation hole 2 a so as to be movable up and down. Is contained. 2 to 6, a spherical ball joint 6 is integrally formed at the lower end portion of the first body 2, and small protrusion-like engagements are formed at three locations on the outer periphery of the ball joint 6. The stop part 6a is integrally projected.

  The lock bolt 5 is engaged with the engagement groove 30a formed in a part of the outer periphery of the steering shaft 30 as shown in FIG. 4 and the engagement groove 30a as shown in FIG. It is possible to move (up and down) between the unlock position where is released. In addition, a rectangular groove-shaped engagement recess 5 a is formed at an intermediate height position on the outer periphery of the lock bolt 5, and a groove-shaped connection recess 5 b is provided in a lateral direction at the lower end of the lock bolt 5. ing.

  On the other hand, as shown in FIGS. 2 and 3, the second body 3 includes a rectangular container-shaped main body 3A and a cylindrical key cylinder mounting portion 3B extending horizontally and integrally from the main body 3A. As shown in FIG. 2, the key cylinder 7 is mounted on the key cylinder mounting portion 3B. As shown in FIG. 2, the output shaft 8 extends horizontally from the center of one end of the key cylinder 7.

  The lid 4 is attached to the opening of the main body 3A of the second body 3, and as shown in FIG. 3, bosses 4A are integrally projected at two locations on the inner surface of the lid 4. Each boss 4A is formed with a circular screw insertion hole 4a. Also, screw holes 3a are formed at two locations corresponding to the screw insertion holes 4a of the lid 4 inside the main body portion 3A of the second body 3, and the lid 4 is inserted into each screw insertion hole 4a. The two screws 9 (see FIG. 1) are respectively screwed into the screw holes 3a of the second body 3 to be attached to the second body 3 and form a storage space together with the main body 3A of the second body 3 (see FIG. 2). ).

  As shown in FIG. 2, the storage space formed inside the main body 3 </ b> A of the second body 3 includes a hanger 10 whose upper end is connected to the lower end of the lock bolt 5, and the hanger 10. A camshaft 11 constituting an operating mechanism that moves (up and down) to a locked position or an unlocked position, a spring 12 that urges the hanger 10 and the lock bolt 5 upward (toward the locked position), and the key cylinder 7 2 is housed, and a first bevel gear 14 and a second bevel gear 15 meshing with each other are accommodated.

The hanger 10 is vertically accommodated in the second body 3, and a connecting convex portion 10 a bent at a right angle is formed at an upper end portion thereof, and the connecting convex portion 10 a is a lower end portion of the lock bolt 5. The upper end portion of the hanger 10 is connected to the lower end portion of the lock bolt 5 by engaging with the connecting recess 5 b penetrating through the connecting bolt 5. Since the connection convex part 10a of the hanger 10 is formed in a substantially spherical shape, the lock bolt 5 is centered on the connection point between the lock bolt 5 and the hanger 10 (the central point of the connection convex part 10a) with respect to the hanger 10. It is connected so that it can rotate. Then, the hanger 10 and the lock bolt 5 are always urged upward (in the lock position direction) by the spring 12 that is fitted between the lower end of the hanger 10 and the inner bottom surface of the second body 3.

  The camshaft 11 constituting the operating mechanism is long in the left-right direction in FIG. 2, and one end (the right end in FIG. 2) is connected to the output shaft 8 extending from the key cylinder 7. A cam 11a is integrally formed on a part of the camshaft 11. The cam 11a is a block-shaped cam portion provided at the lower end of the hanger 10, as shown in FIGS. 10b is engaged. Here, the camshaft 11 rotates when the driver inserts a key (not shown) into the key hole of the key cylinder 7 and turns the camshaft 11, and the cam 11 a formed integrally therewith is the lower end of the hanger 10. By acting on the cam portion 10b provided on the hanger 10, the hanger 10 and the lock bolt 5 connected thereto are moved up and down to move the lock bolt 5 to the lock position or the unlock position.

  As shown in FIG. 2, the first bevel gear 14 is connected to the camshaft 11, and the second bevel gear 15 that meshes with the first bevel gear 14 is the bottom of the main body 3 </ b> A of the second body 3. The rotary shaft 16 is connected to an upper end of the rotary shaft 16 that is inserted and supported perpendicularly to the rotary shaft 16, and the rotary shaft 16 is connected to an ignition switch (rotary switch) (not shown). As shown in FIG. 3, a plurality of first gear pressing portions 4b, a second gear pressing portion 4c, and a cam pressing portion 4d are integrally projected on the inner surface of the lid 4, respectively.

  By the way, the second body 3 and the lid 4 are respectively formed with semi-concave spherical mounting recesses 3C and 4B, and the mounting recesses 3C and 4B are formed integrally with the lower end portion of the first body 2. The ball joint 6 is fitted and held. Here, as shown in FIGS. 2 and 4 to 6, a storage portion 6 </ b> A for storing the lock bolt 5 so as to be able to advance and retract (movable up and down) is formed inside the ball joint 6.

  As described above, the protrusion-shaped small locking portions 6a are integrally projected at three locations on the outer peripheral surface of the ball joint 6, and the three locations on the inner peripheral surface of the mounting recess 3C of the second body 3 (ball A locking hole 3b is formed in a portion of the joint 6 corresponding to the locking portion 6a. In the normal state shown in FIG. 2 (a state where a strong impact is not applied to the second body 3 as will be described later), each locking portion 6a of the ball joint 6 is formed in the mounting recess 3C of the second body 3. The respective fitting holes 3b are respectively fitted, whereby the rotation of the second body 3 relative to the first body 2 is prevented, and the second body 3 is fixed to the first body 2. Here, the engaging portion 6a and the engaging hole 3b that fit together constitute a first fixing portion that fixes the second body 3 to the first body 2, and holds the ball joint 6 and this. The mounting recesses 3C and 4B of the second body 3 and the lid 4 that support the second body 3 so as to be rotatable with respect to the first body 2 when the first fixing portion is broken as will be described later. It constitutes the fixed part.

  Thus, in the present embodiment, the center of rotation of the second body 3 in the second fixing portion is the center point of the ball joint 6, and the center point of the ball joint 6 is shown in FIGS. 2 and 4. In this way, the connecting point between the lock bolt 5 and the hanger 10 in the locked position is configured to coincide.

  By the way, in the steering lock device 1 according to the present invention, when the vehicle is parked, a destructive action for theft of the vehicle is performed in a state where the lock bolt 5 is in the locked position shown in FIGS. 1, 2, and 4. Even in this case, a deadlock mechanism for holding the lock bolt 5 in the lock position is provided.

  As shown in FIG. 4, the deadlock mechanism includes a lock plate 17 fitted and held in a transverse groove-like fitting groove 2 b formed in the first body 2, and a hole 17 a formed in the lock plate 17. It is configured to include a vertically long hold pin 18 that engages and disengages, and a spring 19 that constantly biases the hold pin 18 downward.

  The lock plate 17 is fitted and held in the fitting groove 2b of the first body 2 so as to be slidable in the direction perpendicular to the plane of FIG. 4, and the planar shape thereof includes a narrow portion having a circular hole 17a, and A wide portion (not shown) that is positioned closer to the front side of the page in FIG. 4 than the narrow portion and wider than the narrow portion is configured. The lock plate 17 is urged toward the front side of FIG. 4 by urging means (not shown) such as a spring.

  In addition, the hold pin 18 is inserted and held in the first body 2 and the second body 3 so as to be movable up and down, and in the normal state shown in FIG. The illustrated state is maintained by abutting against the engaging rib 4e, and the upper end of the engaging rib 4e passes through the hole 17a of the lock plate 17 to prevent the lock plate 17 from sliding. In this state, the lock plate 17 is in a free position where it is buried in the fitting groove 2b of the first body 2 and does not protrude into the operating hole 2a, so that the lock plate 17 is engaged with the engagement recess 5a of the lock bolt 5. The lock bolt 5 can move freely between the locked position and the unlocked position without matching.

  Next, an unlocking operation and a locking operation of the steering lock device 1 configured as described above will be described.

1) Unlock operation:
When the vehicle is stopped and the lock bolt 5 is in the locked position as shown in FIGS. 2 and 4 and the rotation of the steering shaft 30 is locked, the driver puts a key (not shown) on the key cylinder 7. When inserted into the key hole, a plurality of tumblers (not shown) provided in the key cylinder 7 are actuated (retracted), and the key can be rotated. From this state, when the driver rotates the key in the clockwise direction, the rotation is transmitted from the output shaft 8 of the key cylinder 7 to the camshaft 11, and the cam 11 a formed integrally with the camshaft 11. Rotates. Then, the hanger 10 provided with the cam portion 10b that engages with the cam 11a is pushed down, and the lock bolt 5 connected to the hanger 10 is also pushed down, so that the lock bolt 5 is unlocked as shown in FIG. Move to. As described above, when the lock bolt 5 moves to the unlock position, the lock bolt 5 is disengaged from the engagement groove 30a of the steering shaft 30. Therefore, the rotation operation of the steering shaft 30 (steering wheel) ( Steering operation).

  Further, the first bevel gear 14 rotates together with the camshaft 11, and the rotation is transmitted to the rotating shaft 16 via the second bevel gear 15, so that an ignition switch (not shown) connected to the rotating shaft 16 is switched. Then, the power state of the vehicle is switched and the starter motor is operated.

2) Locking operation:
When the key is rotated counterclockwise from the state where the lock bolt 5 is in the unlocked position as shown in FIG. 5, the rotation is transmitted from the output shaft 8 of the key cylinder 7 to the camshaft 11, A cam 11a formed integrally with the camshaft 11 rotates. Then, the hanger 10 is moved upward along the cam 11a of the camshaft 11 by the upward biasing force of the spring 12, and the lock bolt 5 connected to the hanger 10 is also moved upward as shown in FIG. Therefore, the upper end portion of the lock bolt 5 is engaged with the engagement groove 30a of the steering shaft 30, the rotation of the steering shaft 30 is locked, and the steering operation becomes impossible. Theft is prevented.

  Further, the first bevel gear 14 rotates in reverse with the camshaft 11, and the rotation is transmitted to the rotating shaft 16 via the second bevel gear 15, so that an ignition switch (not shown) connected to the rotating shaft 16 reverses. Can be switched to.

  By the way, when the second body 3 of the steering lock device 1 is strongly hit from the side for the purpose of theft of the vehicle, the second body 3 receives a strong impact from the side as shown in FIG. Since the three locking portions 6a projecting from the ball joint 6 of the first fixed portion are deformed, the engagement between the locking portion 6a and the locking hole 3b on the second body 3 side is released, and the second The fixation of the body 3 to the first body 2 is released, and the second body 3 rotates around the center point of the ball joint 6 as shown in FIG.

  When the second body 3 rotates with respect to the first body 2 as described above, the hold pin 18 of the deadlock mechanism and the engagement rib 4e of the lid 4 are disengaged. The spring 19 is moved downward by the urging force of the spring 19, and its upper end portion comes out of the hole 17 a of the lock plate 17. Then, the free state of the lock plate 17 is released, and the lock plate 17 slides in the fitting groove 2b of the first body 2 to the back side in FIG. Part) protrudes from the fitting groove 2b toward the lock bolt 5 and engages with an engagement recess 5a formed in the lock bolt 5. As a result, the movement of the lock bolt 5 toward the unlock position is prevented and the lock bolt 5 is held at the lock position, so that the steering lock state is maintained and the vehicle is prevented from being stolen.

  Thus, in the present embodiment, since the center point of the ball joint 6 that is the rotation center of the second body 3 and the connection point of the lock bolt 5 and the hanger 10 at the lock position coincide with each other, 2 Even if the body 3 is rotated with respect to the first body 2 as shown in FIG. 6, only the hanger 10 changes its direction, and the unlock position direction is caused by being pulled by the hanger 10 of the lock bolt 5. Movement to is prevented. For this reason, even when the deadlock mechanism is activated by the rotational movement of the second body 3, the positions of the lock plate 17 of the deadlock mechanism and the engagement recess 5a of the lock bolt 5 are not displaced, and the lock plate 17 is securely engaged with the engagement recess 5 a of the lock bolt 5. As a result, the lock bolt 5 can be reliably held at the locked position, and the rotation operation of the steering shaft 30 (steering wheel) is prevented, thereby improving the antitheft property of the vehicle.

  In the present embodiment, since the first body 2 and the second body 3 are connected by the ball joint 6, no matter which direction the impact is applied to the second body 3, The positional deviation between the rotation center and the connection point between the lock bolt 5 and the hanger 10 is eliminated, and the movement of the lock bolt 5 in the unlock position direction by being pulled by the hanger 10 is prevented. For this reason, the deadlock mechanism can be operated more reliably and the lock bolt 5 can be held in the locked position.

  Furthermore, in the present embodiment, the second body 3 is brought into contact with the first body 2 by fitting the locking portion 6 a of the ball joint 6 constituting the first fixing portion into the locking hole 3 b of the second body 3. Although it is fixed, when a large impact is applied to the second body 3 from the outside, the locking portion 6a is deformed and the engagement between the locking portion 6a and the locking hole 3b is released. 3 to the first body 2 is released, and the deadlock mechanism operates reliably. Thus, a 1st fixing | fixed part can be comprised by the simple structure by the latching | locking part 6a and the latching hole 3b which mutually fit.

  By the way, in the present embodiment, the center point of the ball joint 6 that is the rotation center of the second body 3 and the connecting point of the lock bolt 5 and the hanger 10 at the lock position are matched. May not coincide with each other, and a slight deviation is allowed between the two.

  That is, as shown in FIG. 4, when the engagement allowance of the lock bolt 5 to the engagement groove 30a of the steering shaft 30 is X and the clearance between the lock plate 17 and the engagement recess 5a of the lock bolt 5 is Y, dead In order to hold the lock bolt 5 in the locked position by the lock mechanism, it is necessary to make the gap Y smaller than the engagement allowance X (Y <X). Here, when the second body 3 rotates around the center point of the ball joint 6, the hanger 10 and the lock bolt 5 are connected to the extent that the lock bolt 5 is not operated more than the gap Y in the unlock position direction. Even if the point is deviated from the center point of the ball joint 6, the lock plate 17 can be reliably engaged with the engagement recess 5 a of the lock bolt 5.

  In the present embodiment, the locking portion 6a constituting the first fixing portion is provided in the ball joint 6, and the locking hole 3b into which the locking portion 6a is fitted is provided on the second body 3 side. On the contrary, the locking portion may be provided on the second body 3 side, and the locking hole may be provided on the ball joint 6 side.

  Further, as shown in FIG. 7, the first fixing portion is a steel ball 21 that is urged radially outward by a spring 20 that is mounted in a plurality of circular holes 6 b formed in the ball joint 6. A plurality of locking holes 3b formed in the mounting recess 3C of the second body 3, and by engaging each steel ball 21 with each locking hole 3b, the second body 3 is attached to the first body 2. Alternatively, a configuration that is fixed may be employed. By adopting such a configuration, it is possible to prevent the occurrence of a problem that parts must be replaced when the locking portion 6a shown in FIGS. 2 and 3 is accidentally crushed during assembly. Further, even when the positions of the first body 2 and the second body 3 are shifted because the steel ball 21 is retracted into the circular hole 6b, there is no need to replace the parts again, and the first body 2 and the second body 3 can be positioned.

  Furthermore, in the present embodiment, the second body 3 and the lid 4 are made of a resin material, but these may be made of a metal material such as magnesium.

DESCRIPTION OF SYMBOLS 1 Steering lock device 2 1st body 2a Operation hole of 1st body 2b Fitting groove of 1st body 3 2nd body 3A Main body part of 2nd body 3B Key cylinder mounting part of 2nd body 3C Mounting recess of 2nd body 3a Second body screw hole 3b Second body locking hole 4 Lid 4A Lid boss 4B Lid mounting recess 4a Lid screw insertion hole 4b Lid first gear pressing part 4c Lid second gear pressing part 4d Lid 4e Lid engagement rib 5 Lock bolt 5a Lock bolt engagement recess 5b Lock bolt connection recess 6 Ball joint 6A Ball joint storage 6a Ball joint lock 6b Ball joint circular hole 7 Key Cylinder 8 Key cylinder output shaft 9 Screw 10 Hanger 10a Hanger connecting projection 0b Hanger cam portion 11 Cam shaft 11a Cam shaft cam 12, 13 Spring 14 First bevel gear 15 Second bevel gear 16 Rotating shaft 17 Lock plate 17a Lock plate hole 18 Hold pin 19, 20 Spring 21 Steel ball 30 Steering Shaft 30a Steering shaft engagement groove

Claims (3)

A first body that contains a lock bolt that is fixed to the vehicle body and is movable between a lock position that engages with the steering shaft and an unlock position that releases the engagement;
A second body comprising a hanger fixed to the first body and connected to the lock bolt; and an operating mechanism for moving the hanger to a locked position or an unlocked position;
The first body is slidably held in a hold pin inserted and held movably along the movement direction of the lock bolt and a fitting groove formed in a direction perpendicular to the movement direction of the hold pin. A deadlock mechanism that includes a lock plate that engages and disengages the hold pin, and that locks the lock bolt in a lock position by sliding the lock plate and engaging the lock bolt in conjunction with the movement of the hold pin. When,
In the steering lock device with
A first fixing portion for fixing the second body to the first body;
A second fixing portion that rotatably supports the second body with respect to the first body when the first fixing portion is broken;
The steering lock device is characterized in that the center of rotation of the second body in the second fixing portion and the connecting point of the lock bolt and the hanger at the lock position substantially coincide with each other . Prior Symbol second fixing portion, and a spherical ball joint having a housing part for movably accommodating the locking bolt therein is provided in the first body, the ball joint provided on said second body It has a concave spherical mounting recess that holds it rotatably,
The steering lock device according to claim 1, wherein a connection point between the lock bolt and the hanger in a locked position is arranged at a substantially central position of the ball joint. The first fixing portion includes a locking portion provided in one of the ball joint or the mounting recess, and a locking hole provided in the other and into which the locking portion is fitted,
The steering lock device according to claim 2, wherein the locking portion is configured to be deformable or movable by an impact on the second body.

Images