JP2010195369A - Locking device of vehicular seat - Google Patents

Abstract

The present invention provides a vehicle seat locking device that can be easily unlocked and can suppress locking rattle.
A lock device 1 according to the present invention has a hook spring locking hole 255 in which a hook 25 rotates in an unlocking direction and a locking end 33a of a hook spring 33 is locked. When it moves over the straight line L passing through 214 and the pin 321 to the unlocking direction biasing region, the pivoting biasing direction is switched, and the hook is pivotally biased in the unlocking direction by the hook spring. For this reason, after the hook is rotated by a predetermined angle, the striker 23 is rotated in the unlocking direction following the detachment of the striker 23 from the base groove portion 213, so that the lock can be easily released. Further, since the hook that is urged to rotate in the locking direction by the hook spring sandwiches the striker with the base groove portion without any gap, the lock can be performed while suppressing rattling.
[Selection] Figure 2

Description

  The present invention relates to a vehicle seat locking device, and more particularly to a vehicle seat locking device for fixing a backrest of a retractable seat, a detachable seat or the like to a side surface or a vehicle floor inside the vehicle.

  Some vehicles such as automobiles can reduce the unevenness in the vehicle and widely use the space when the backrest of the rear seat falls down or the seat can be removed from the vehicle floor. Such a backrest of a retractable seat or a detachable seat is fixed to a side surface inside the vehicle or a vehicle floor via a lock device. For example, Patent Document 1 discloses an invention in which a lock device (latch device) is provided on a side surface inside a vehicle and a side surface of the backrest, and the backrest is fixed to a side surface inside the vehicle. The latch device includes a striker, a base (bracket), a hook (latch), a pole, a tension coil spring, a wedge-shaped latch, and a torsion coil spring.

  The striker is fixed to a side surface inside the vehicle. The base is formed with a base groove (notch) into which a striker can be inserted, and is fixed to the side of the backrest. The hook is formed with a hook groove (notch) that engages with a striker engaged in the base groove of the base, and is rotatably attached to the base. The pole is pivotally attached to the base so as to be engageable with a hook in a locked position. The tension coil spring is mounted between the hook and the pole so as to urge the hook in the unlocking direction and urge the pole in the engagement direction with the hook. The wedge-shaped latch has a wedge portion that can be inserted between a pin protruding from the hook and a striker engaged with the hook, and is attached to the hook so as to be movable in the insertion direction. The torsion coil spring is locked to the hook so as to urge the wedge-shaped latch in the inserting direction between the pin and the striker.

  In the lock device having such a configuration, at the time of locking, the hook is pressed by the striker engaged in the base groove portion of the base and rotated in the lock direction. Accordingly, the striker is sandwiched and locked between the bottom surface of the base groove portion of the base and the side surface of the hook groove portion of the hook. At this time, the pole engages with the hook to prevent the hook from rotating in the unlocking direction, so that the lock is not released when an external force is applied to the striker in a direction away from the base groove of the base. It has become. Further, the wedge portion of the wedge-shaped latch is inserted between the pin and the striker, and the striker is sandwiched between the bottom surface of the base groove portion of the base and the upper side surface of the wedge-shaped latch, so that the striker is not rattled. It has become. When the lock is released, the pole is rotated by applying a load in the direction in which the pole is detached from the hook, and the hook is rotated in the unlocking direction by the tension coil spring. As a result, the side surface of the hook groove portion of the hook and the wedge portion of the wedge-shaped latch are separated from the striker and unlocked.

US69455585B1 (Figs. 4 and 5)

In the conventional locking device described above, in the locked state, the wedge-shaped latch is urged by the torsion coil spring, and the wedge portion is fitted between the pin and the striker. For this reason, the wedge part may be fitted between the pin and the striker due to the wedge effect and may be difficult to come off. In such a case, it is necessary to increase the load applied to the pole at the time of unlocking, so that the unlocking operation becomes difficult, and in some cases, the lock cannot be released.
Even in the unlocked state, since the wedge-shaped latch is biased by the torsion coil spring, a part of the wedge portion protrudes from the side surface of the hook groove portion of the hook. For this reason, the protruding portion of the wedge-shaped latch is retracted by pressing against the spring force of the torsion coil spring by the striker engaged in the base groove portion when locked, and the bottom surface of the base groove portion of the base and the side surface of the hook groove portion of the hook It is necessary to put a striker in between. However, even in the unlocked state, the wedge-shaped latch is biased by the torsion coil spring, so that the wedge portion may be caught between the pin and the striker and may not be sufficiently retracted. In such a case, the protrusion of the wedge-shaped latch cannot be retracted even if the striker is pressed by the striker, so that the hook cannot be rotated in the locking direction and cannot be engaged with the pole. It may become.

  This invention is made | formed in view of the said subject, It is set as the problem which should be solved to provide the locking device of the vehicle seat which can cancel | release lock | rock easily and can suppress the rattling of a lock | rock.

  The structural feature of the invention according to claim 1 is that the base is fixed to one of the fixed body and the movable body, and the base is formed with a base groove portion into which the striker fixed to the other of the fixed body and the movable body can enter and exit. A hook groove portion in which the striker engaged in the base groove portion can be engaged and disengaged is formed, is rotatably supported on the base by a first rotation shaft, and the striker is engaged in the hook groove portion. A hook that can be rotated between a lock release position that is not released and a lock position in which the striker is engaged with the hook groove portion and cannot be removed from the hook groove portion, and is rotatably supported on the base by a second rotation shaft. An abutting portion capable of abutting on the abutted portion of the hook in the locked position is formed, and the corresponding abutting portion abuts on the abutted portion of the hook, whereby the locked position of the hook A pole that restricts the rotation in the unlocking direction, and allows the rotation in the unlocking direction from the lock position of the hook by separating the contact portion from the contacted portion of the hook, and A pole urging member that urges the pole to rotate in a direction in which the abutting portion of the pole abuts against a contacted portion of the hook, and urges the hook to rotate. A hook urging member that is switchable between a direction in which the striker is locked and a direction in which the lock is released, and having two locking ends, and one locking end of the hook urging member formed on the hook And the other locking end of the hook urging member that is positioned outside the first locking portion with respect to the first rotation shaft and locked to the first rotation shaft. A second locking portion, and one engagement of the hook urging member When the first locking portion whose end is locked is located in the locking direction biasing region on one side from the straight line passing through the second locking portion and the first rotation shaft, The hook urging means urges the hook to rotate in the locking direction, and when the first locking portion is located in the unlocking direction urging region on the other side of the straight line, the hook The biasing means is to bias the hook in the unlocking direction.

The structural feature of the invention according to claim 2 is that, in claim 1, the hook biasing member is a turnover spring.
The structural feature of the invention according to claim 3 is that, in claim 1 or 2, the second locking portion is provided fixed to the base.
According to a fourth aspect of the present invention, in the first or second aspect, the second locking portion is fixed and a straight line passing through the first locking portion and the first rotation shaft is used. A fixing portion that is relatively movable, and in conjunction with an operation in which the contact portion of the pole rotates in a direction to contact the contacted portion of the hook, the fixing portion is connected to the fixing portion and the first portion; A straight line passing through the rotation axis is rotated in the unlocking direction so that the second locking portion is positioned in the lock direction biasing region, and the contact portion of the pole is in contact with the hook. In conjunction with the operation of turning in the direction of detachment from the part, the straight line passing through the fixing part and the first turning shaft is turned in the locking direction so that the second locking part is A locking portion moving mechanism that moves so as to be positioned in the unlocking direction urging region is further provided.

The structural feature of the invention according to claim 5 is the first link member according to claim 4, wherein the locking portion moving mechanism has one end portion rotatably supported on the pole by a third rotation shaft. And one end is rotatably connected to the other end of the first link member, the other end is provided with the fixing portion, and the hook is connected between the one end and the other end. And a second link member rotatably supported on one rotation shaft.
The structural feature of the invention according to claim 6 is that in any one of claims 1 to 5, the base is rotatably supported on the base by a fourth rotating shaft, and the hook in the locked position is provided. An engaging portion that can be engaged with and disengaged from the engaged portion is formed, and the engaging portion follows the operation of rotating in a direction in which the contact portion of the pole contacts the contacted portion of the hook. The hook engages with the engaged portion of the hook at a position, prevents the hook from rotating in the unlocking direction from the locked position, and the contact portion of the pole is detached from the contacted portion of the hook. A cam member that follows the movement of the hook in the direction and disengages the engaging portion from the engaged portion of the hook in the locked position and allows the hook to rotate in the unlocking direction from the locked position. And in the direction in which the engaging portion presses the engaged portion of the hook A cam biasing member for biasing rotating the cam member is further comprising a.

  In the invention according to claim 1, in the unlocked state, the hook is urged to rotate in the unlocking direction by the hook urging member, and the rotation in the locking direction is restricted. The urging in the unlocking direction by the hook urging member is maintained as long as the first locking portion where the locking end of the hook urging member is locked is located in the unlocking direction urging region. The hook can be positioned and fixed at the unlock position. At this time, since the contact portion of the pole is merely in contact with the portion away from the contacted portion of the hook by the pole biasing member, there is no possibility that the pole will bite into the hook, and the hook biasing member When the urging force in the unlocking direction is switched to the locking direction, the hook can be rotated well.

At the time of locking, the hook urged to rotate in the locking direction by the hook urging member pinches the striker with no gap between the base groove portion, so there is no possibility that the hook will rotate poorly due to interference of other members. Regardless of the position of the opening in the opening of the base groove, it can be locked with no play even if the striker diameter varies.
The pole is pivoted by the pole biasing member so that the contact portion of the pole faces the contacted portion of the hook. This also restricts the hook from rotating in the unlocking direction. The

  When releasing the lock to release the moving body from the fixed body, the pole is rotated in the direction in which the contact portion of the pole is released from the contacted portion of the hook, and the striker presses the hook groove to hook the hook. It rotates in the unlocking direction against the urging force in the locking direction due to, but since the urging force in the locking direction by the hook urging member works as a reaction force of the pressing force of the striker, the resistance when unlocking the striker is growing. At this time, the hook is rotated in the unlocking direction, and the first locking portion where the locking end of the hook urging member is locked follows the straight line passing through the first rotation shaft and the second locking portion. When it moves beyond the unlocking direction biasing region, the pivoting biasing direction is switched, and the hook is pivotally biased in the unlocking direction by the hook biasing member. For this reason, after the hook is rotated by a predetermined angle, the hook is rotated in the unlocking direction following the removal of the striker from the base groove portion, so that the lock can be easily released.

In the invention according to claim 2, the switching of the biasing force of the hook in the locking direction or the rotating force of the hook in the lock position releasing direction can be easily and reliably performed with a simple configuration called a turnover spring.
In the invention which concerns on Claim 3, not only the latching end of a hook biasing member but the latching end of a pole biasing member is latched to the 2nd latching | locking part provided fixed to the base. Therefore, the apparatus can be downsized to save space.
In the invention which concerns on Claim 4, the straight line which passes along a fixing | fixed part and a 1st rotation axis | shaft is positively moved by the latching | locking part moving mechanism, and switching of the rotation urging | biasing direction of a hook urging member is carried out in a short time. Can be configured to do. As a result, when the pole is pushed when the lock is released and the abutting portion of the pole is separated from the abutted portion of the hook, the urging force in the locking direction by the hook urging member works as a reaction force of the pushing force of the pole. The urging force in the locking direction can be switched to the urging force in the unlocking direction at an early stage, and the lock can be released very easily. Even if the hook is rotated from the unlocked position to the locked position when the striker is not engaged in the base groove, the hook urging member is rotated by the locking mechanism moving mechanism only by pushing the pole. The hook can be returned from the lock position to the lock release position by switching the dynamic biasing direction from the lock direction to the lock release direction.

In the invention which concerns on Claim 5, interlocking | linkage with a pole and a fixing | fixed part can be performed with high precision by simple structure called a link mechanism.
In the invention which concerns on Claim 6, the engaging part of a cam member engages with the to-be-engaged part of a hook by a cam biasing member at the time of a lock | rock, and the rotation of the hook in the unlocking direction is prevented. Further, since the engaging portion of the cam member presses the engaged portion of the hook in the locking direction by the cam biasing member, it is possible to maintain a locked state in which the striker sandwiched between the hook and the base is suppressed.

It is a perspective view showing a mode that the locking device of the vehicular seat of this embodiment was attached to the rear seat. (A) is a top view of the locking device for a vehicle seat according to the first embodiment of the present invention, and (B) is a plan view thereof. It is a disassembled perspective view of the locking device of the vehicle seat of FIG. 2A is a plan view showing the unlocking state of the vehicle seat locking device of FIG. 2 with the sub-base removed, and FIG. 2B is the initial locking state of the vehicle seat locking device of FIG. 2 with the sub-base removed. FIG. 2A is a plan view showing a locked state of the vehicle seat locking device of FIG. 2 with the sub-base removed, and FIG. 2B is a plan view of another embodiment of the vehicle seat locking device of FIG. 2 with the sub-base removed. FIG. 2A is a plan view showing a state immediately before the pole is removed from the vehicle seat locking device of FIG. 2 with the sub-base removed, and FIG. 2B is a state in which the sub-base is removed of the vehicle seat locking device of FIG. FIG. (A) is the top view of the locking device of the vehicle seat which concerns on the 2nd Embodiment of this invention, (B) is the top view. 7A is a plan view showing the unlocked state of the vehicle seat locking device in FIG. 7 with the sub-base removed, and FIG. 7B is the initial locking state of the vehicle seat locking device in FIG. 7 with the sub-base removed. FIG. 7A is a plan view showing a locked state of the vehicle seat locking device of FIG. 7 with the sub-base removed, and FIG. 7B is a plan view of another embodiment of the vehicle seat locking device of FIG. 7 with the sub-base removed. FIG. 7A is a plan view showing the state immediately before the pole is removed from the locking device for the vehicle seat in FIG. 7 with the sub-base removed, and FIG. 7B is the state just before the striker is removed from the locking device for the vehicle seat in FIG. It is a top view removed and shown.

A vehicle seat locking device according to a first embodiment of the present invention will be described below with reference to FIGS. In the following description, up, down, left, and right are directions of arrows shown in FIG.
The vehicle seat locking device 1 (hereinafter referred to as the locking device 1) is a device mounted on the rear seat 10 of the automobile shown in FIG. 1, and is indicated by a solid line when the locking device 1 is in a locked state. The backrest (moving body) 11 can be fixed to a side surface (fixed body) inside the vehicle, and when the locking device 1 is in the unlocked state, the backrest 11 can be tilted toward the seat cushion 12 as shown by a two-dot chain line. is there. In this locking device 1, a base 21 is fixed to a side surface of a backrest 11 of a rear seat 10, and a striker 23 is fixed to a side surface inside the vehicle at a position facing the base 21 in a state where the backrest 11 is raised. Then, the locked state is released by pushing the lever 24 attached to the base 21 and the sub base 22 side, and the backrest 11 of the rear seat 10 can be tilted to the seat cushion 12 side.

  As shown in FIGS. 2 and 3, the locking device 1 includes a hook 25, a pole 26, and a plate (cam member) 27 that are accommodated between the base 21 and the sub base 22. It is supported freely. In addition, between the base 21 and the sub-base 22, a first link (first link member, locking portion moving mechanism) 31, a second link (second link member, locking portion moving mechanism) 32, a torsion coil A hook spring (hook urging member) 33 of a spring, a pole spring (pole urging member) 34 of a tension coil spring, and a plate spring (cam urging member) 35 of a torsion coil spring are accommodated.

  The base 21 and the sub base 22 are plate-like members having substantially the same outer shape, but the base 21 is formed by bending a substantially central portion into a U-shape when viewed from above, and the sub base 22 is substantially flat as a whole. Is formed. When the base 21 and the sub base 22 having such a shape are overlapped, a space is formed between the bent portion 212 of the base 21 and the substantially central portion of the sub base 22, and both the left and right side portions of the base 21 and the sub base 22 are formed. The left and right side parts of the screen will be in close contact. In the space, the hook 25, the pole 26, the plate 27, the first link 31, and the second link 32 are accommodated. In addition, the contact portion is formed with four mounting holes 21a and 22a through which bolts for fixing to the side surface of the backrest 11 are inserted.

  Further, an L-shaped flange portion 211 is formed on the upper side of the bent portion 212 of the base 21 so as to rise upward and then bend toward the sub-base 22 side. The flange portion 211 is formed so as to rise from a position entering a predetermined distance from the upper side corner of the bent portion 212. Further, an upper side of the sub-base 22 is formed with a flange portion 221 having an L-shape in side view, which is bent upward from the side opposite to the base 21. The width of the upward bent portion of the flange portion 221 is formed substantially the same as the width of the flange portion 211, and the tip of the flange portion 221 and the tip of the flange portion 211 are formed to face each other. Thus, the base 21 is formed with the flange portion 211 rising from the upper side of the bent portion 212, and the sub-base 22 is formed with the flange portion 211 and the flange portion 221 that forms a predetermined space. The flange portions 211 and 221 cover the hook spring 33 and the pole spring 34 so as to protect them from interfering with a pad (not shown) placed around the hook spring 33 and the pole spring 34.

A base groove 213 into which the striker 23 is engaged is formed from the lower side center of the base 21 upward. The back end face of the base groove 213 is a bottom face 213a with which the striker 23 abuts. In addition, a sub-base groove 223 into which the striker 23 is engaged is formed from the center of the lower side of the sub-base 22 at a position overlapping with the base groove 213 upward. The back side end face of the sub-base groove 223 is a bottom face 223a with which the striker 23 abuts.
A hook rotation shaft (first rotation shaft) 214 that rotatably supports the hook 25 and the second link 32 is provided on the upper right side with respect to the base groove portion 213 of the base 21. On the left side of the base groove portion 213 of the base 21, a pole rotation shaft (second rotation shaft) 215 for rotatably supporting the pole 26 is provided. On the upper side of the pole rotation shaft 215 of the base 21, a plate rotation shaft (fourth rotation shaft) 216 for rotatably supporting the plate 27 is provided. Further, a pole spring locking portion 217 is formed at the left corner of the flange portion 211 so as to be cut downward and bent downward so that one end of the pole spring 34 is locked.

  The hook 25 is a plate-like member. A hook groove portion 251 into which the striker 23 is engaged is formed in the lower left portion, and a hook contact portion 261 of a pole 26 described later enters and contacts the upper left portion. A recess (contacted portion) 253 that restricts the rotation of the hook 25 in the unlocking direction B (see FIG. 4A) is formed. The hook side surface 252 that continues from the bottom surface 253a of the recess 253 and the upper side surface 253b of the recess 253 allows the tip of the hook contact portion 261 of the pole 26 to slide along the bottom surface 253a and the hook side surface 252 as the hook 25 rotates. Further, it is formed in an arcuate surface concentric with the hook rotation shaft 214. A shaft hole 254 through which the hook rotation shaft 214 is inserted is formed in the upper right portion (substantially central portion of the hook 25) with respect to the hook groove portion 251 of the hook 25. A hook spring locking hole (first locking portion) 255 in which one locking end 33a of the hook spring 33 is locked is formed. On the left side of the hook spring locking hole 255 on the back side of the hook 25, a hook engaging portion 271 of the plate 27 described later is engaged to prevent the hook 25 from rotating in the unlocking direction B, and A cylindrical plate engagement portion (engaged portion) 256 that holds the striker 23 between the base groove portion 213 without a gap and maintains a locked state in which rattling is suppressed is provided in the thickness direction.

Such a hook 25 is located on the right side with respect to the base groove 213 in the space between the bent portion 212 of the base 21 and the substantially central portion of the sub base 22, and the base 21 and the sub base 22 are connected by the hook rotation shaft 214. It is supported so that it can rotate freely. The hook 25 is unlocked before the striker 23 is engaged with the hook groove 251 (see FIG. 4A), and is locked so that the striker 23 is engaged and cannot be removed. It pivots around the hook pivot shaft 214 between the positions (see FIG. 5A).
Further, when the hook 25 is positioned at the lock position, the hook contact portion 261 of the pole 26 is inserted into the recess 253, so that the rotation of the hook 25 in the unlocking direction B is performed on the upper side surface 253b of the recess 253. Is regulated by contacting the upper side surface 261a of the hook contact portion 261. Further, since the hook engaging portion 271 of the plate 27 is engaged and pressed against the plate engaging portion 256, the hook 25 is prevented from rotating in the unlocking direction B, and the striker 23 is connected to the hook groove portion 251. A locked state in which rattling is suppressed by being sandwiched between the base groove portion 213 without any gap is maintained.
The hook 25 is urged to rotate by a hook spring 33. As will be described in detail later, the hook spring 33 functions as a turnover spring. Depending on the position of the hook spring locking hole 255 in which one locking end 33a of the hook spring 33 is locked, the hook 25 Can be switched to the unlocking direction B or the locking direction A.

  The pole 26 is a plate-like member, and a convex hook contact portion 261 that restricts the rotation of the hook 25 in the unlocking direction B by entering and contacting the concave portion 253 of the hook 25 is formed in the upper right portion. A shaft hole 262 through which the pole rotation shaft 215 is inserted is formed in the lower portion. A link rotation shaft (third rotation shaft) 263 that rotatably supports a first link 31 described later is provided in the thickness direction above the shaft hole 262 on the back side of the pole 26. . A pin 264 on which the other end of the pole spring 34 is locked and the lever 24 is pivotally supported protrudes in the thickness direction at an upper portion on the front side of the pole 26. On the back side of the pole 26, a pin 265 that is engaged with a pin slot 273 of the plate 27, which will be described later, protrudes in the thickness direction below the pin 264.

  Such a pole 26 is located on the left side with respect to the base groove 212 in the space between the bent portion 212 of the base 21 and the substantially central portion of the sub base 22, and the base 21 and the sub base 22 are connected by the pole rotation shaft 215. It is supported so that it can rotate freely. The pole 26 is rotationally biased by a pole spring 34 in a direction in which the hook contact portion 261 enters and contacts the recess 253 of the hook 25. The hook contact portion 261 of the pole 26 enters the recess 253 of the hook 25 when the hook 25 is positioned at the locked position. Therefore, the rotation of the hook 25 in the unlocking direction B is performed on the recess 253. It is regulated by the contact between the side surface 253b and the upper side surface 261a of the hook contact portion 261.

The plate 27 is a plate-like member, and a hook engagement surface (engagement portion) 271 that engages with the plate engagement portion 256 of the hook 25 is formed on the right side surface. The hook engagement surface 271 has a length from the plate rotation shaft 216 in order to continuously maintain the engagement with the plate engagement portion 256 as the plate 27 rotates, as shown in FIG. Are formed in a circular arc shape that becomes longer in the counterclockwise direction. A shaft hole 272 through which the plate rotation shaft 216 is inserted is formed in the left part of the plate 27, and a pin groove hole 273 in which the pin 265 of the pole 26 is engaged is formed in the upper right part of the shaft hole 272. It has been drilled. A plate spring engagement groove 274 is formed in the lower portion of the plate 27 so that one end of the plate spring 35 is movably engaged. The other end of the plate spring 35 is in contact with the left side surface 212 b of the bent portion 212 of the base 21.
The pin groove 273 is in contact with the pin 265 so as to rotate the plate 27 in the direction opposite to the engaging direction. The wall 273c is open to the wall 273c, and the hook engaging surface 271 is the plate engaging portion 256. When the pin 265 is disengaged from the pin engagement groove 273a due to rotation of the engagement direction of the pole 26, and the pin engagement groove 273a into which the pin 265 is engaged in order to maintain the disengaged state from the pin 27, the plate 27 rotates clockwise. A pin release portion 273b that allows rotation in the direction is formed. The plate spring engaging groove 274 is configured such that one end of the plate spring 35 is moved to the right as the plate 27 rotates in the engaging direction in order to rotate the plate 27 in the engaging direction by the spring force of the plate spring 35. It is formed to be movable.

  Such a plate 27 is positioned behind the hook 25 and the pole 26 in the space between the bent portion 212 of the base 21 and the substantially central portion of the sub-base 22, and rotates to the base 21 by the plate rotation shaft 216. It is supported freely. The plate 27 is biased by a plate spring 35 in a direction in which the hook engaging surface 271 engages with the plate engaging portion 256 of the hook 25. The hook engaging surface 271 of the plate 27 engages with the plate engaging portion 256 when the hook 25 is located at the lock position. At this time, the contact point between the hook engaging surface 271 and the plate engaging portion 256 is above the line segment connecting the plate rotating shaft 216 and the hook rotating shaft 214. Movement is blocked. Further, the hook engaging surface 271 presses the plate engaging portion 256 as the length from the plate rotating shaft 216 increases as the plate 27 rotates in the engaging direction. Is held between the hook groove portion 251 and the base groove portion 213 without a gap, and a locked state in which rattling is suppressed is maintained.

  One end of the first link 31 is rotatably supported on a link rotation shaft 263 provided on the pole 26, and the other end is rotatably supported on one end of the second link 32 via the link rotation shaft 311. Has been. The second link 32 is rotatably supported on the hook rotation shaft 214 between one end and the other end, and the other end is positioned outside the hook spring locking hole 255 with respect to the hook rotation shaft 214. Is formed. A pin hole (fixed portion) 32a is formed at the other end of the second link 32, and a pin (second second) on which the other locking end 33b of the hook spring 33 is locked in the pin hole 32a. (Locking portion) 321 is fitted so as to protrude in the thickness direction.

  Here, the hook spring 33 that functions as a turnover spring will be described. In order for the hook spring 33 to function as a turnover spring, the position of the hook spring locking hole 255 where one locking end 33a of the hook spring 33 is locked is changed to the position of the other locking end 33b of the hook spring 33. It is necessary to move the pin 321 (pin hole 32 a) and the straight line L passing through the hook rotation shaft 214. By moving the position of the hook spring locking hole 255 to the area on the right side of the straight line L (locking direction biasing area) by the rotation of the hook 25 in the locking direction A, one locking end 33a of the hook spring 33 is moved. The force (component force) that pushes the hook spring locking hole 255 is a direction that urges the hook 25 to rotate in the locking direction A. Further, the hook spring engaging hole 255 is moved to the left side (the unlocking direction urging region) from the straight line L by the rotation of the hook 25 in the unlocking direction B. The force (component force) by which 33a pushes the hook spring locking hole 255 is a direction in which the hook 25 is urged to rotate in the unlocking direction B.

  The first and second links 31 and 32 are located between the hook 25 and the pole 26 and the plate 27 in the space between the bent portion 212 of the base 21 and the substantially central portion of the sub-base 22, and are linked to the link rotation shaft. 263 and a hook rotation shaft 214 are rotatably supported. The first and second links 31 and 32 rotate in conjunction with the rotation of the pole 26, and a straight line L passing through the pin 321 (pin hole 32a) and the hook rotation shaft 214 is connected to the hook spring locking hole. It moves relative to a straight line LL passing through 255 and the hook rotation shaft 214. That is, when the pole 26 rotates in the direction in which the hook contact portion 261 contacts the second pole contact surface 253, the first link 31 pushes the second link 32 and rotates in the unlocking direction B. Therefore, the straight line L (pin 321 (pin hole 32a)) moves in the unlocking direction B with respect to the straight line LL. On the other hand, when the pole 26 rotates in the direction in which the hook contact portion 261 is detached from the second pole contact surface 253, the first link 31 rotates in the lock direction A by pulling the second link 32. The straight line L (pin 321 (pin hole 32a)) moves in the lock direction A with respect to the straight line LL. Thereby, the hook spring 33 can be made to function positively as a turnover spring. Even if the hook 25 is rotated from the unlocked position to the locked position when the striker 23 is not engaged in the base groove 213, the first and second links 31, 32, the rotation biasing direction of the hook spring 33 can be switched from the lock direction A to the lock release direction B to return the hook 25 from the lock position to the lock release position.

The operation of the locking device 1 configured as described above will be described with reference to FIGS. 4 to 6, the sub-base 22 is removed.
First, the lock device 1 in the unlocked state shown in FIG. The hook 25 is in a lock release position where the lower right side surface is in contact with the right side surface 212a of the bent portion 212 of the base 21 and the rotation in the unlock direction B is restricted, and the opening of the hook groove portion 251 is the opening of the base groove portion 213. The standby part 257 is located substantially in the center in the width direction of the base groove part 213. At this time, since the hook spring locking hole 255 is located in the unlocking direction biasing region on the left side of the straight line L passing through the pin 321 and the hook rotation shaft 214, the hook spring 33 causes the hook 25 to move in the unlocking direction. B is urged to rotate in B, and the rotation in the lock direction A is restricted. Thereby, the hook 25 is positioned and fixed at the lock release position.

  The pole 26 is in a state where the hook contact portion 261 is in contact with the hook side surface 252 by the spring force of the pole spring 34, and the plate 27 has a pin 265 at the left end of the pin engaging groove 273 a of the pin groove hole 273. It is positioned and rotated in the direction opposite to the engaging direction against the spring force of the plate spring 35, and the hook engaging surface 271 is in a state of being detached from the plate engaging portion 256. Therefore, the pole 26 and the plate 27 do not act on the hook 25 at all.

  Next, how the lock device 1 in the unlocked state is locked will be described with reference to FIGS. 4 and 5. FIG. First, in the unlocked state shown in FIG. 4A, the striker 23 engaged from the opening of the base groove portion 213 contacts the standby portion 257 of the hook 25 so that the upper side surface 251a of the hook groove portion 251 is moved to the hook spring 33. Press against the spring force. Then, the striker 23 is engaged with the back side of the base groove portion 213, and the hook 25 is pressed by the striker 23 to rotate in the locking direction (clockwise direction) A. At this time, the straight line LL passing through the hook spring locking hole 255 and the hook rotation shaft 214 approaches the straight line L.

  Then, as shown in FIG. 4B, when the hook 25 rotates by a predetermined angle in the lock direction A, the hook contact portion 261 of the pole 26 is detached from the hook side surface 252. As a result, the pole 26 rotates in the direction (clockwise direction) in which the hook contact portion 261 enters the recess 253 by the spring force of the pole spring 34, and the tip of the hook contact portion 261 contacts the bottom surface 253 a of the recess 253. Since the first link 31 presses the second link 32 by the clockwise rotation of the pole 26, the second link 32 rotates in the unlocking direction (counterclockwise direction) B. That is, the straight line L rotates around the hook rotation shaft 214 toward the straight line LL that passes through the hook spring locking hole 255 and the hook rotation shaft 214. Therefore, since the straight line L and the straight line LL rotate in a direction away from each other after being overlapped with each other, the switching of the rotation biasing direction of the hook spring 33 can be performed in a short time.

  Since the hook spring locking hole 255 is positioned in the lock direction biasing region on the right side of the straight line L, the hook spring 33 pivotally biases the hook 25 in the lock direction A. Further, the pin 265 is disengaged from the pin engagement groove 273a of the pin groove hole 273 and positioned in the right pin release portion 273b by the clockwise rotation of the pole 26, so that the plate 27 has the spring force of the plate spring 35. As a result, the hook engaging surface 271 rotates in a direction (clockwise direction) to engage with the plate engaging portion 256, and the hook engaging surface 271 engages with the plate engaging portion 256.

  The striker 23 engaged with the base groove portion 213 further presses the upper side surface 251a of the hook groove portion 251 and rotates the hook 25 in the lock direction A until it contacts the bottom surface 213a of the base groove portion 213. At this time, since the plate 27 is further rotated in the clockwise direction by the spring force of the plate spring 35, the hook engaging surface 271 is moved from the plate rotation shaft 216 as the plate 27 is rotated in the clockwise direction. As the length increases, the plate engagement portion 256 is always engaged and the hook 25 is restricted from rotating in the unlocking direction B. As a result, as shown in FIG. 5A, the striker 23 is sandwiched between the bottom surface 213a of the base groove portion 213 and the lower side surface 251b of the hook groove portion 251 without any gap, and the locked state in which rattling is suppressed is maintained. .

  5A shows a state in which the striker 23 is locked when driven into the left corner of the bottom surface 213a of the base groove 213, but the same applies even when the striker 23 is driven into the right corner of the bottom 213a of the base groove 213. Can be locked to. At this time, as shown in FIG. 5 (B), the bottom surface 213a of the base groove 213 is formed so as to descend to the right, so that the hook 25 is in the locking direction (clockwise direction) more than the state of FIG. 5 (A). A slightly rotated to A. However, the plate 27 is also rotated clockwise by the spring force of the plate spring 35 so that the upper portion of the hook engaging surface 271 is engaged with the plate engaging portion 256. Therefore, even if the striker 23 is driven into the right corner of the bottom surface 213a of the base groove 213, the striker 23 can be locked in the same manner as when driven into the left corner. In this way, the hook 25 that is urged to rotate in the lock direction A by the hook spring 33 sandwiches the striker 23 with the base groove portion 213 without any gap, so that the rotation failure of the hook 25 due to interference of other members occurs. In addition, no matter where the striker 23 has entered in the opening width of the base groove portion 213 or even if the diameter of the striker 23 varies, it is possible to perform locking that suppresses rattling.

  In the locked state of the locking device 1 shown in FIG. 5A, when an external force is applied from the striker 23 to the opening side of the base groove 213 (in the direction of arrow D), a force in the unlocking direction B is applied to the hook 25. Will be added. However, since the plate 25 is engaged with the hook engaging surface 271 of the plate 27, the hook 25 is not easily released from the locked state by a weak external force. When a strong external force is applied to cause deformation of the plate 27 and the hook 25 attempts to rotate in the unlocking direction B, the pole 26 restricts the rotation of the hook 25 in the unlocking direction B. That is, since the hook contact portion 261 of the pole 26 enters the recess 253 of the hook 25 when the hook 25 is positioned at the lock position, when the hook 25 attempts to rotate in the unlocking direction B, the recess 253 The upper side surface 253b abuts on the upper side surface 261a of the hook abutting portion 261 and restricts the rotation.

  Next, how the lock device 1 in the locked state is brought into the unlocked state will be described with reference to FIGS. 4, 5, and 6. First, the lever 24 (see FIG. 2) is pushed in the direction of arrow E in the locked state shown in FIG. Since one end of the lever 24 is pivotally supported by the pin 264 of the pole 26, the hook 26 detaches from the recess 253 around the pole rotation shaft 215 as shown in FIG. 6A. Rotate in the direction (counterclockwise direction). Since the pin 265 comes into contact with the wall portion 273c of the pin groove hole 273 by the rotation of the pole 26 in the counterclockwise direction, the pin 27 engages with the pin engagement groove 273a. The hook engaging surface 271 is detached from the plate engaging portion 256 by rotating in a direction of separating from the portion 256 (counterclockwise direction). At this time, the hook engaging surface 271 is easily removed from the plate engaging portion 256 because the length from the plate rotating shaft 216 becomes shorter as the plate 27 rotates counterclockwise. . Further, since the first link 31 pulls the second link 32 by the counterclockwise rotation of the pole 26, the second link 32 rotates in the lock direction (clockwise direction) A. That is, the straight line L rotates toward the straight line LL around the hook rotation shaft 214.

  When the lever 24 is further pushed in the direction of arrow E to rotate the pole 26 counterclockwise, the hook contact portion 261 of the pole 26 is detached from the recess 253 as shown in FIG. 6B. At this time, since the straight line L exceeds the straight line LL, the hook spring locking hole 255 is located in the unlocking direction urging region on the left side of the straight line L, and the hook spring 33 causes the hook 25 to move in the unlocking direction B. Rotating force is applied. Thus, after the pole 26 rotates by a predetermined angle, the hook 25 rotates in the unlocking direction B following the detachment of the striker 23 from the base groove 213, so that the lock can be easily released. And finally, as shown to FIG. 4 (A), the hook 25 is positioned in a lock release position.

  Next, a vehicle seat locking device according to a second embodiment of the present invention will be described with reference to FIG. 7, which corresponds to FIG. In FIG. 7, the same components as those of the locking device 1 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The locking device 2 according to the second embodiment is different from the locking device 1 according to the first embodiment in that the first link 31 and the second link 32 are not provided. Then, instead of the pin 321 (pin hole 32a) provided on the second link 32 to which the other locking end 33b of the hook spring 33 is locked, a locking pin 218 is provided at the upper right portion of the base 21. Has been.

  The pin 321 is provided on the second link 32 and is movable, but the locking pin 218 is fixed to the base 21. The fixing position of the locking pin 218 is set to a position where the rotational position of the hook 25 cannot be intentionally changed to lock / unlock, thereby maintaining the lock performance function described above and the first link 31 and the first link. The two links 32 can be dispensed with. Further, since the locking pin 218 is fixed to the base 21, the pole spring locking portion 217 to which one end of the pole spring 33 is locked is not formed on the base 21, and one end of the pole spring 33 is also engaged. Locked to the stop pin 218. Thereby, size reduction of the locking device 1 can be achieved by making the base 21 space-saving.

The operation of the locking device 2 configured as described above will be described with reference to FIGS. 8 to 10, the sub base 22 is removed.
First, the lock device 2 in the unlocked state shown in FIG. The hook 25 is in a lock release position where the lower right side surface is in contact with the right side surface 212a of the bent portion 212 of the base 21 and the rotation in the unlock direction B is restricted, and the opening of the hook groove portion 251 is the opening of the base groove portion 213. The standby part 257 is located substantially in the center in the width direction of the base groove part 213. At this time, since the hook spring locking hole 255 is located in the unlocking direction biasing region on the left side of the straight line Ll passing through the locking pin 218 and the hook rotation shaft 214, the hook spring 33 locks the hook 25. The rotation in the release direction B is biased to restrict the rotation in the lock direction A. Thereby, the hook 25 is positioned and fixed at the unlocking position.

  The pole 26 is in a state where the hook contact portion 261 is in contact with the hook side surface 252 by the spring force of the pole spring 34, and the plate 27 has a pin 265 at the left end of the pin engaging groove 273 a of the pin groove hole 273. It is positioned and rotated in the direction opposite to the engaging direction against the spring force of the plate spring 35, and the hook engaging surface 271 is in a state of being detached from the plate engaging portion 256. Therefore, the pole 26 and the plate 27 do not act on the hook 25 at all.

  Next, how the lock device 2 in the unlocked state is locked will be described with reference to FIGS. First, in the unlocked state shown in FIG. 8A, the striker 23 engaged from the opening of the base groove portion 213 abuts on the standby portion 257 of the hook 25 so that the upper side surface 251a of the hook groove portion 251 is moved to the hook spring 33. Press against the spring force. Then, the striker 23 is engaged with the back side of the base groove portion 213, and the hook 25 is pressed by the striker 23 to rotate in the locking direction (clockwise direction) A. At this time, the hook spring locking hole 255 approaches the straight line Ll.

  Then, as shown in FIG. 8B, when the hook 25 rotates by a predetermined angle in the lock direction A, the hook contact portion 261 of the pole 26 is detached from the hook side surface 252. As a result, the pole 26 rotates in the direction (clockwise direction) in which the hook contact portion 261 enters the recess 253 by the spring force of the pole spring 34, and the tip of the hook contact portion 261 contacts the bottom surface 253 a of the recess 253. Since the hook spring locking hole 255 is positioned in the lock direction biasing region on the right side of the straight line Ll, the hook spring 33 biases the hook 25 in the lock direction A. Further, the pin 265 is disengaged from the pin engagement groove 273a of the pin groove hole 273 and positioned in the right pin release portion 273b by the clockwise rotation of the pole 26, so that the plate 27 has the spring force of the plate spring 35. As a result, the hook engaging surface 271 rotates in a direction (clockwise direction) to engage with the plate engaging portion 256, and the hook engaging surface 271 engages with the plate engaging portion 256.

  The striker 23 engaged with the base groove portion 213 further presses the upper side surface 251a of the hook groove portion 251 and rotates the hook 25 in the lock direction A until it contacts the bottom surface 213a of the base groove portion 213. At this time, since the plate 27 is further rotated in the clockwise direction by the spring force of the plate spring 35, the hook engaging surface 271 is moved from the plate rotation shaft 216 as the plate 27 is rotated in the clockwise direction. As the length increases, the plate engagement portion 256 is always engaged and the hook 25 is restricted from rotating in the unlocking direction B. As a result, as shown in FIG. 9A, the striker 23 is sandwiched between the bottom surface 213a of the base groove portion 213 and the lower side surface 251b of the hook groove portion 251 without any gap, and the locked state in which rattling is suppressed is maintained. .

  FIG. 9A shows a state in which the striker 23 is locked when driven into the left corner of the bottom surface 213a of the base groove 213, but the same applies even when the striker 23 is driven into the right corner of the bottom 213a of the base groove 213. Can be locked to. At this time, as shown in FIG. 9B, the bottom surface 213a of the base groove portion 213 is formed so as to be lowered to the right, so that the hook 25 is in the locking direction (clockwise direction) more than the state of FIG. A slightly rotated to A. However, the plate 27 is also rotated clockwise by the spring force of the plate spring 35 so that the upper portion of the hook engaging surface 271 is engaged with the plate engaging portion 256. Therefore, even if the striker 23 is driven into the right corner of the bottom surface 213a of the base groove 213, the striker 23 can be locked in the same manner as when driven into the left corner. In this way, the hook 25 that is urged to rotate in the lock direction A by the hook spring 33 sandwiches the striker 23 with the base groove portion 213 without any gap, so that the rotation failure of the hook 25 due to interference of other members occurs. In addition, no matter where the striker 23 has entered in the opening width of the base groove portion 213 or even if the diameter of the striker 23 varies, it is possible to perform locking that suppresses rattling.

  In the locked state of the locking device 2 shown in FIG. 9A, when an external force is applied from the striker 23 to the opening side of the base groove 213 (in the direction of arrow D), a force in the unlocking direction B is applied to the hook 25. Will be added. However, since the plate 25 is engaged with the hook engaging surface 271 of the plate 27, the hook 25 is not easily released from the locked state by a weak external force. When a strong external force is applied to cause deformation of the plate 27 and the hook 25 attempts to rotate in the unlocking direction B, the pole 26 restricts the rotation of the hook 25 in the unlocking direction B. That is, since the hook contact portion 261 of the pole 26 enters the recess 253 of the hook 25 when the hook 25 is positioned at the lock position, when the hook 25 attempts to rotate in the unlocking direction B, the recess 253 The upper side surface 253b abuts on the upper side surface 261a of the hook abutting portion 261 and restricts the rotation.

  Next, how the locking device 2 in the locked state is brought into the unlocked state will be described with reference to FIGS. First, in the locked state shown in FIG. 9A, the lever 24 (see FIG. 2) is pushed in the direction of arrow E. Since one end of the lever 24 is pivotally supported by the pin 264 of the pole 26, the hook 26 detaches from the recess 253 around the pole rotation shaft 215 as shown in FIG. 10A. Rotate in the direction (counterclockwise direction). Since the pin 265 comes into contact with the wall portion 273c of the pin groove hole 273 by the rotation of the pole 26 in the counterclockwise direction, the pin 27 engages with the pin engagement groove 273a. The hook engaging surface 271 is detached from the plate engaging portion 256 by rotating in a direction of separating from the portion 256 (counterclockwise direction). At this time, the hook engaging surface 271 is easily removed from the plate engaging portion 256 because the length from the plate rotating shaft 216 becomes shorter as the plate 27 rotates counterclockwise. .

  When the lever 24 is further pushed in the direction of arrow E and the pole 26 is rotated counterclockwise, the hook contact portion 261 of the pole 26 is detached from the recess 253 as shown in FIG. At this time, the hook spring locking hole 255 is located in the unlocking direction biasing region on the left side of the straight line Ll, so that the hook spring 33 biases the hook 25 in the unlocking direction B. Thus, after the pole 26 rotates by a predetermined angle, the hook 25 rotates in the unlocking direction B following the detachment of the striker 23 from the base groove 213, so that the lock can be easily released. Finally, as shown in FIG. 8A, the hook 25 is positioned at the unlocked position.

  As described above, according to the locking devices 1 and 2 of the first and second embodiments, in the unlocked state, the hook 25 is urged to rotate in the unlocking direction B by the hook spring 33 and is locked in the locking direction A. The rotation is restricted. The bias in the unlocking direction B by the hook spring 33 is maintained as long as the hook spring locking hole 255 in which the locking end 33a of the hook spring 33 is locked is positioned in the unlocking direction biasing region. Therefore, the hook 25 can be positioned and fixed at the unlock position. At this time, since the hook contact portion 261 of the pole 26 is merely in contact with the hook side surface 252 by the pole spring 34, there is no possibility that the pole 26 will bite into the hook 25, and the unlocking direction B by the hook spring 33 will be described. When the urging force is switched in the lock direction A, the hook 25 can be rotated well.

At the time of locking, the hook 25 that is urged to rotate in the locking direction A by the hook spring 33 sandwiches the striker 23 with the base groove portion 213 without any gap, so that there is a possibility that the rotation failure of the hook 25 due to interference of other members may occur. Further, no matter where the striker 23 enters in the opening width of the base groove portion 213, even if the diameter of the striker 23 varies, it is possible to lock the backlash.
The pole 26 is pivotally biased by the pole spring 34 so that the hook contact portion 261 of the pole 26 faces the recess 253 of the hook 25, so that the hook 25 also rotates in the unlocking direction B. Restricted.

  When the lock is released, the pole 26 is rotated in a direction in which the hook contact portion 261 of the pole 26 is detached from the recess 253 of the hook 25, and the striker 23 presses the hook groove portion 251 to lock the hook 25 with the hook spring 33. Although it rotates in the unlocking direction B against the urging force of A, the urging force in the locking direction A by the hook spring 33 acts as a reaction force against the pressing force of the striker 23, and therefore the resistance when unlocking the striker 23 Will grow. At this time, the hook 25 rotates in the unlocking direction B, and the hook spring locking hole 255 in which the locking end 33a of the hook spring 33 is locked has the hook rotating shaft 214, the pin 321, and the locking pin. When the arm moves beyond the straight lines L and Ll passing through 218 to the unlocking direction biasing region, the pivoting biasing direction is switched, and the hook 25 is pivotally biased in the unlocking direction B by the hook spring 33. For this reason, after the hook 25 is rotated by a predetermined angle, the striker 23 is rotated in the unlocking direction B following the detachment of the striker 23 from the base groove portion 213, so that the lock can be easily released.

  Further, the switching of the biasing force of the hook 25 in the locking direction A or the rotating force in the unlocking direction B can be easily and reliably performed with a simple configuration of the hook spring 33 having a function of a turnover spring. it can. Further, at the time of locking, the hook engaging surface 271 of the plate 26 is engaged with the plate engaging portion 256 of the hook 25 by the plate spring 35 to prevent the hook 25 from rotating in the unlocking direction B. Further, since the hook engaging surface 271 of the plate 26 presses the plate engaging portion 256 of the hook 25 in the locking direction A by the plate spring 35, the locked state in which rattling of the striker 23 sandwiched between the hook 25 and the base 21 is suppressed. Can be maintained.

Further, according to the locking device 1 of the first embodiment, the first and second links 31 and 32 positively move the straight line LL passing through the pin 321 (pin hole 32a) and the hook rotation shaft 214. The hook spring 33 can be configured to switch the rotation biasing direction in a short time. Thus, when the pole 26 is pushed to release the hook contact portion 261 of the pole 26 from the second pole contact surface 253 of the hook 25, the urging force in the locking direction A by the hook spring 33 is applied to the pole 26. However, the urging force in the locking direction A can be switched to the urging force in the unlocking direction B at an early stage, and the lock can be released very easily. Even if the hook 25 is rotated from the unlocked position to the locked position when the striker 23 is not engaged with the base groove 213, the first and second links 31, 32, the rotation biasing direction of the hook spring 33 can be switched from the lock direction A to the lock release direction B to return the hook 25 from the lock position to the lock release position. In addition, the linkage between the pole 26 and the pin 321 (pin hole 32a) can be performed with high accuracy by a simple configuration called a link mechanism.
Further, according to the locking device 2 of the second embodiment, the locking pin 218 fixed to the base 21 is locked to not only the locking end 33 b of the hook spring 33 but also the pole spring 34. Since the end can also be locked, the apparatus can be miniaturized to save space.

  In the above-described embodiment, the torsion coil spring is used as the turnover spring, but it can also be constituted by a tension coil spring or a compression coil spring. Moreover, although the locking device that fixes the backrest of the retractable seat to the side surface inside the vehicle has been described, the invention can also be applied to a locking device that fixes the removable seat or the like to the vehicle floor.

1, 2: Vehicle seat locking device, 10: Rear seat, 11: Backrest, 21: Base, 213: Base groove, 214: Hook rotation shaft, 23: Striker, 24: Lever, 25: Hook, 251: Hook groove portion, 253: concave portion, 255: hook spring locking portion, 256: plate engaging portion, 26: pole, 261: hook abutting portion, 27: plate, 271: hook engaging surface, 31: first link, 32: Second link, 321: Pin, 32a: Pin hole, 33: Hook spring, 33b: Locking end, 34: Pole spring, 35: Plate spring.

Claims (6)

A base that is fixed to one of the fixed body and the movable body, and has a base groove portion into which a striker fixed to the other of the fixed body and the movable body can be inserted and removed;
A hook groove portion is formed in which the striker engaged in the base groove portion can be engaged and disengaged. The hook groove portion is rotatably supported by the first rotation shaft, and the striker is not engaged in the hook groove portion. A hook that can rotate between an unlock position and a lock position where the striker is engaged in the hook groove and cannot be removed from the hook groove;
A contact portion that is rotatably supported on the base by a second rotation shaft and that can contact the contact portion of the hook at the lock position is formed. By contacting the contact portion, the rotation of the hook in the unlocking direction is regulated from the locked position, and when the contact portion is separated from the contacted portion of the hook, the lock position of the hook A pole allowing rotation in the unlocking direction from
A pole urging member that urges the pole to rotate in a direction in which the abutting portion of the pole abuts against the abutted portion of the hook;
A hook urging member that urges the hook to rotate, and is capable of switching the rotation urging direction between a direction in which the striker is locked and a direction in which the lock is released, and having two locking ends; ,
A first locking portion formed on the hook and locked with one locking end of the hook biasing member;
A second locking portion that is located outside the first locking portion with respect to the first rotation shaft and that is locked with the other locking end of the hook urging member;
The first locking portion on which one locking end of the hook biasing member is locked is biased in the locking direction on one side of a straight line passing through the second locking portion and the first rotation shaft. When located in the region, the hook urging means urges the hook to rotate in the locking direction, and the first locking portion is in the unlocking direction urging region on the other side of the straight line. When the vehicle seat is located, the hook urging means urges the hook to rotate in the unlocking direction.   2. The vehicle seat locking device according to claim 1, wherein the hook urging member is a turnover spring.   3. The vehicle seat locking device according to claim 1, wherein the second locking portion is fixed to the base.   3. The fixing portion according to claim 1, further comprising a fixing portion to which the second locking portion is fixed and is relatively movable with respect to a straight line passing through the first locking portion and the first rotation shaft. In conjunction with the movement of the contact portion rotating in the direction in which the contact portion contacts the contacted portion of the hook, the straight line passing through the fixing portion and the first rotation shaft rotates in the unlocking direction. The second locking portion is moved to move so as to be positioned in the lock direction biasing region, and is interlocked with an operation in which the contact portion of the pole is rotated in a direction of separating from the contacted portion of the hook. The fixed portion is moved so that a straight line passing through the fixed portion and the first rotation shaft is rotated in the locking direction so that the second locking portion is positioned in the unlocking direction urging region. A vehicular seat locking device, further comprising a locking portion moving mechanism.   5. The locking portion moving mechanism according to claim 4, wherein one end portion of the locking portion moving mechanism is rotatably supported on the pole by a third rotation shaft, and one end portion is the other end of the first link member. The fixed portion is provided at the other end, and is rotatably supported by the first rotation shaft of the hook between the one end and the other end. A vehicle seat locking device comprising a second link member. 6. The engaging portion according to claim 1, wherein the engaging portion is rotatably supported on the base by a fourth rotating shaft and is detachable from an engaged portion of the hook at the lock position. The engaging portion engages with the engaged portion of the hook in the locked position following the movement of the contact portion of the pole that is formed and rotates in a direction to contact the abutted portion of the hook. The hook is prevented from rotating in the unlocking direction from the locked position, and the engagement follows the operation in which the contact portion of the pole rotates in a direction to detach from the contacted portion of the hook. A cam member that is disengaged from the engaged portion of the hook at the lock position, and that allows the hook to rotate in the unlocking direction from the lock position;
A vehicular seat locking device, further comprising: a cam urging member that urges the cam member to rotate in a direction in which the engaging portion presses the engaged portion of the hook.

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