JP2011042959A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To generally miniaturize a lock device for fixedly locking a seat structural part at a predetermined position in a vehicle by reducing the number of components to be assembled and simplifying the components to be assembled to reduce the size of the assembled components. <P>SOLUTION: A drive plate 60 includes a pressing dowel 65 which presses a pole 50 to move the pole in the specified direction of a second journal member 35 with a rotating force generated when the drive plate is rotatably biased by a spring member 70. The pressing dowel 65 which is provided to the drive plate 60 and which presses the pole 50 so as to move the pole in the specified radial direction of the second journal member 35 is inserted and disposed in a pole journal hole 55 into which the second journal member 35 is inserted. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lock device that locks a seat component such as a seat back so as to be fixed at a predetermined position in a vehicle.

A vehicle seat on which a passenger is seated is installed in a vehicle such as an automobile. Such a vehicle seat is known in which a locking device is provided that locks a seat component such as a seat back at a fixed position appropriately set in the vehicle.
The lock device includes a hook for receiving the striker, a base member for storing the striker received by the hook, and a pole for holding or releasing the storage of the striker. The lock device configured as described above can be in an engaged state in which the striker is accommodated and held with respect to the base member, and locks the seat component such as the seat back to a fixed position that is appropriately set in the vehicle. be able to. In addition, when a striker is accommodated in a base member, it is accommodated in the recessed part provided in the base member.

  By the way, in this kind of locking device, as described above, when the striker is accommodated and held with respect to the base member, a push-in plate that further acts to rotate the hook is provided. Are known (for example, see Patent Document 1). In the locking device provided with this additional plate, when the striker is in the engaged state, the hook is further rotated to press the striker accommodated and held in the recess toward the inner peripheral end of the recess. The play (backlash) in the recess of the striker to be accommodated can be eliminated.

JP-A-2005-271903

  However, in the above-described locking device, there is a demand for downsizing the entire locking device. Specifically, in the lock device described above, it is necessary to provide an urging spring for appropriately rotating the additional plate in addition to the urging spring for rotating the pole. There is a demand to reduce the number of parts and reduce the number of parts by reducing the number of biasing springs. In addition, there is a demand for reducing the size of the entire locking device assembled by reducing the size of each component such as the hook, pole, and follow-up plate.

  The present invention has been made in view of such circumstances, and a problem to be solved by the present invention is a locking device that locks a seat component such as a seat back so as to be fixed at a predetermined position in a vehicle. The purpose is to reduce the number of members to be assembled, to simplify the constituent members (assembled members) and to reduce the size, and to reduce the size of the entire locking device.

In solving the above-described problems, the locking device according to the present invention employs the following means.
In other words, the locking device according to the first aspect of the present invention is provided on one of the two members disposed in the vehicle, and engages with the striker provided on the other of the two members to connect the two members to each other. A locking device for locking, wherein a base member fixedly installed on one of the two members, a hook pivotally supported by a first shaft supported by the base member, and the base member A biasing spring that is hung on the thrusting plate and the hook, and is pivotally supported by the supported second shaft and biased so that the thrusting plate and the hook approach each other. The hook is configured to rotate in conjunction with the movement of the striker entering the recess provided in the base member, and the striker is held between the recess by the rotation. Been The pole is urged by the rotational force from the additional plate rotated and urged by the urging spring when the hook places the striker in the clamping state, and the clamping It is configured to engage and lock the hook in a state to hold the sandwiched state, and the driving plate engages with the hook to hold the sandwiched state. In order to further rotate the hook in the clamping state in a direction in which the striker is further clamped by the pole, the pole is made to have a specific diameter of the second shaft by the rotational force that is biased by the biasing spring. A pressing part that presses the pole so as to move in the direction, and the pressing part is inserted into a pole shaft support hole through which the second shaft is inserted in order to pivotally support the pole. Characterized in that it is.
The “specific radial direction of the second shaft” here refers to the direction in which the pole should be pressed against the hook in order to further rotate the hook in the direction in which the striker is further clamped. It is set by direction.

According to this locking device, the push-in plate includes the pressing portion that presses the pole so as to move in the specific radial direction of the second shaft by the rotational force that is rotationally biased by the biasing spring. The pole can be pressed so as to move in a specific radial direction of the second axis by the rotation of the driving plate, and the hook in the clamped state can be further rotated by this pressing in the direction of further clamping the striker.
Here, the pressing portion that is provided on the push-in plate and presses the pole so as to move in the specific radial direction of the second shaft is inserted into the pole shaft support hole through which the second shaft is inserted. Therefore, a pressed portion that presses the pole with the pressing portion is formed in the pole shaft support hole, and the pressed portion is provided without changing the outer shape of the pole. That is, a simple shape can be adopted for the outer shape other than the inside of the pole shaft support hole without providing the pressed portion. Furthermore, since the follow-up plate is also pivotally supported by the second shaft, a simple shape can be adopted for shapes other than the periphery of the shaft support portion of the add-on plate.
Further, according to this locking device, the biasing spring that is hooked on the driving plate and the hook and biases the driving plate and the hook to approach each other biases the rotation of the driving plate and thus Since the pawl is also energized by receiving the rotational force from the rotationally energized push-in plate, both the pole and the push-in plate can be energized by a single energizing spring. As a result, the number of urging springs can be reduced to one, and the overall size of the locking device can be reduced and the cost can be reduced.
In this way, it is possible to reduce the size by simplifying the shapes of the pole and the follow-up plate, and further, it is possible to reduce the number of urging springs to one, which is the minimum quantity, and to reduce the size of the entire locking device. Can do.

  A locking device according to a second aspect of the invention is the locking device according to the first aspect of the invention, wherein the base member has a pole guide hole in which a guide projection provided on the pole is fitted to guide the movement of the pole. A radial guide portion for guiding the movement of the second shaft of the pole in the specific radial direction when the pole guide hole is in the locked state; and the locked state. A rotation direction guide portion for guiding rotation of the pole while restricting movement of the second shaft in the specific radial direction when the pole is in an unlocked state. It is characterized by doing.

According to this locking device, the pole urged by the turning force from the follow-up plate is guided by the pole guide hole so as to move in the specific radial direction of the second shaft when in the locked state. In addition, in the unlocked state, the rotation is guided while the movement of the second shaft in the specific radial direction is restricted.
As a result, the pole that is energized by receiving the rotational force from the rotationally energized follow-up plate can be moved so that the hook acts to retreat the striker when locked. In the locked state, the hook can be moved so as to be engaged so as to hold the clamped state, so that the movement of the pole can be made stable and reliable.

According to the lock device of the first invention, the shape of the pole and the follow-up plate can be simplified, the size can be reduced, and the urging spring can be reduced to a minimum quantity, and the lock device as a whole can be achieved. The size can be reduced.
According to the lock device of the second aspect of the invention, the pole that is energized by receiving the rotational force from the rotationally energized loading plate can be moved so that the hook drives the striker in the locked state. In the unlocked state, the hook in the clamped state can be moved so as to hold the clamped state, so that the movement of the pole can be made stable and reliable.

It is a side view which shows the vehicle seat installed in a motor vehicle. It is a disassembled perspective view which shows the decomposition | disassembly state of a locking device. It is a side view which shows the inside of the locking device of an assembly state, and is a side view of a lock state. FIG. 4 is a top view showing a case where the locking device shown in FIG. 3 is viewed from above. FIG. 4 is a side view showing the inside when the lock device shown in FIG. 3 is in an unlocked state. FIG. 4 is a side view showing the inside when the locking device shown in FIG. 3 is in a state before being driven in.

Hereinafter, a locking device 20 according to an embodiment for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a vehicle seat 10 installed in an automobile.
A vehicle seat 10 shown in FIG. 1 is installed inside an automobile as a vehicle, and is seated by a passenger of the automobile. The vehicle seat 10 shown in FIG. 1 is shown as being tilted forward, and a seat cushion 11 on which an occupant sits, and a seat back that is connected to the seat cushion 11 via a coupling device 12 and serves as a backrest for the occupant seated. 13 and a headrest 14 that serves as a headrest for a seated occupant. The seat cushion 11 includes a cushion frame 11a that forms a framework.
By the way, the vehicle seat 10 is fixedly installed on the vehicle body floor F by connecting the front and rear (front and rear with respect to the seating posture) portions of the seat cushion 11 to the vehicle body floor F. Specifically, the lower front portion of the cushion frame 11a is coupled so as to be pivotally supported with respect to a bracket member 16 fixedly installed on the vehicle body floor F. In addition, a locking device 20 that engages with a striker S that is fixedly installed on the vehicle body floor F is provided at the lower rear portion of the cushion frame 11a. That is, the locking device 20 is provided at the lower rear portion of the cushion frame 11a corresponding to one of the two members according to the present invention. On the other hand, the striker S is provided on the vehicle body floor F corresponding to the other of the two members according to the present invention.
Thus, the locking device 20 is engaged with the striker S provided on the vehicle body floor F, whereby the cushion frame 11a is fixedly coupled to the vehicle body floor F, and the vehicle seat 10 is connected to the vehicle body floor F. Locked to F. The striker S is provided so as to protrude upward from the vehicle body floor F so as to be engaged with the lock device 20 descending from above from the vehicle body floor F, and a columnar member is appropriately folded. It is formed by bending. For this reason, the cross section of the striker S has a circular shape as shown in the figure.

Next, the locking device 20 provided as described above will be described.
FIG. 2 is an exploded perspective view showing an exploded state of the locking device 20. 3 is a side view (in the direction of arrows III-III in FIG. 2) showing the inside of the lock device 20 in the assembled state, and is a side view in the locked state. FIG. 4 is a top view showing the locking device 20 shown in FIG. 3 as viewed from above. 5 and 6 are diagrams when the operation of the locking device 20 shown in FIG. 3 is changed. That is, FIG. 5 is a side view showing the inside when the locking device 20 shown in FIG. 3 is in the unlocked state. FIG. 6 is a side view showing the inside when the locking device 20 shown in FIG. 3 is in a pre-loading state.
As shown in FIGS. 2 and 3, the locking device 20 includes base plates 21 and 21 as base members, and a first support member 31 and a second shaft as first shafts supported by the base plates 21 and 21. A second pivotal support member 35, a hook 40 pivotally supported by the first pivotal support member 31, a pole 50 pivotally supported by the second pivotal support member 35, and an additional plate 60. And a spring member 70 as an urging spring hung on the hook 40 and the follow-up plate 60. Although not shown in FIG. 2, one end side of an operation cable 80 (see FIG. 3 and the like) that is pulled by an occupant's unlocking operation is connected to the push-in plate 60. Hereinafter, each of these components will be described.

The base plate 21 will be described.
As shown in FIG. 2, the base plates 21 and 21 are members that are screwed to the cushion frame 11a while supporting the hook 40, the pole 50, and the follow-up plate 60 when the lock device 20 is attached to the cushion frame 11a. It is. Although not particularly shown, the base plate 21 is provided with screw holes for screwing to the cushion frame 11a.
As shown in FIGS. 2 and 3, the base plates 21 and 21 have first support holes 23a and 23b and second support holes 24a and 24b through which the first shaft support member 31 and the second shaft support member 35 are inserted and supported. Is provided.
The first shaft support member 31 inserted and supported through the first support holes 23a and 23b supports the hook 40 so as to be rotatable. Specifically, the first shaft support member 31 includes support portions 32 a and 32 b supported by the base plates 21 and 21, and a hook rotation shaft support portion 33 that supports the hook 40 for rotation. The support portions 32a and 32b are formed to be inserted and supported by the first support holes 23a and 23b, and the hook rotation shaft support portion 33 is formed to be inserted and supported by the shaft support hole 41 of the hook 40. .
Similarly, the second shaft support member 35 inserted and supported in the second support holes 24a and 24b supports the pole 50 and the push-in plate 60 so as to be rotatable. Specifically, the second shaft support member 35 rotates the support portions 36 a and 36 b supported by the base plates 21 and 21, the pole rotation shaft support portion 37 that rotates the pole 50, and the push-in plate 60. And a follow-up plate rotating shaft support portion 38 that supports the moving shaft. The support portions 36 a and 36 b are formed so as to be inserted and supported by the second support holes 24 a and 24 b, and the pole rotation shaft support portion 37 is formed to be inserted and supported by the pole shaft support hole 55 of the pole 50. The push-in plate rotation shaft support portion 38 is formed so as to support the insertion shaft in the shaft support hole 61 of the pole follow-up plate 60. As described later, the second shaft support member 35 supported by the base plates 21 and 21 includes a pole rotation shaft support portion 37 and a follow-up plate rotation shaft support portion 38 that are adjacently disposed as shown in FIG. Thus, the pole 50 and the follow-up plate 60 which are arranged so as to be adjacent to each other are pivotally supported.

The base plates 21 and 21 are provided with a recess 25 for receiving the striker S. As shown in FIG. 1 and the like, the recess 25 is provided so as to cut out part of the base plates 21 and 21 in order to receive the striker S. Specifically, the recess 25 is formed so as to have an arc shape inside, and the notch is enlarged toward the opening side. Here, the inner peripheral end 26 arranged in the concave portion 25 and located in the innermost arc shape (the uppermost position in the figure) is positioned in a direction that coincides with the direction in which the striker S is sandwiched. ing. For this reason, when the striker S is accommodated so as to be pressed against the inner peripheral end 26 of the recess 25, the movement of the striker S is restricted in the recess 25.
Further, of the two base plates 21 and 21, in the base plate 21 adjacent to the pivotally supported pole 50, the movement of the pole 50 urged by the rotational force from the follow-up plate 60 is guided. A pole guide hole 27 is provided. That is, the pole guide hole 27 includes a radial guide portion 27a and a rotational direction guide portion 27b formed in a groove shape. The pole guide hole 27 (the radial guide portion 27a, A function of guiding the movement of the pole 50 is exhibited by fitting the guide protrusion 57 provided on the pole 50 in the rotation direction guide portion 27b) so as to be movable.
More specifically, the radial guide portion 27a is for guiding the movement of the second pivotal support member 35 of the pole 50 in a specific radial direction when in the locked state. Here, the “specific radial direction of the second shaft support member 35” means that the pole 50 should be pressed against the hook 40 in order to further rotate the hook 40 in the clamping state in the direction in which the striker S is further clamped. It is set in a direction that matches the direction. In other words, the radial guide portion 27a extends from a portion where the pole 50 is pivotally supported to a portion where the hook 50 is in contact with the hook 40 in a state where the pole 50 is engaged with the hook 40 shown in FIG. Is formed. In this way, as will be described later, in a state where the pole 50 is engaged with the hook 40 shown in FIG. 3, the hook 40 in the clamping state is further rotated in the direction in which the striker S is further clamped. The pole 50 can be pushed and guided to the hook 40.
Moreover, the rotation direction guide part 27b is for guiding the rotation of the pole 50 when it is out of the locked state and in the unlocked state. At this time, the rotation of the pole 50 is guided while restricting the movement of the second shaft support member 35 in a specific radial direction. That is, the rotation direction guide portion 27b is formed so as to extend in the circumferential direction centering on a portion where the pole 50 is pivotally supported. In this way, the pawl 50 can be guided to rotate so that the pawl 50 changes from the state shown in FIG. 5 to the state shown in FIG.

Next, the hook 40 will be described.
The hook 40 is turned between a holding state in which the striker S is held together with the recess 25 of the base plate 21 and a holding state in which the striker S is released by turning to release the striker S. It can be switched. As will be described later, when the hook 40 holds the striker S together with the recess 25 by the pole 50, the lock device 20 is in a locked state in which the striker S is engaged. be able to.
As shown in FIGS. 2 and 3, the hook 40 is provided with a shaft support hole 41 at substantially the center so that the hook rotation shaft support portion 33 of the first shaft support member 31 is inserted. The shaft support hole 41 is formed to have an inner diameter that substantially matches the outer diameter of the hook rotation shaft support portion 33 so that the hook 40 can be rotated.
In addition, the hook 40 is provided with a holding recess 42 for holding the striker S together with the recess 25 of the base plate 21. The sandwiching recess 42 is formed by an inner jaw portion 42a located in the upper part of the figure and an outer jaw part 42b located in the lower part of the figure so as to have a concave shape for receiving the striker S. In this way, when the striker S tries to enter the recess 25 provided in the base plate 21, the striker S pushes the inner jaw portion 42a of the hook 40 inward (upward in the drawing). Thus, the hook 40 is rotated in conjunction with the entering movement, and the striker S can be held between the recess 25 by this rotation. Conversely, when the striker S is released, the striker S pushes the outer jaw portion 42b of the hook 40 outward (downward in the drawing). That is, as shown in FIG. 3 and FIG. 6, when the opening direction of the holding recess 42 of the hook 40 is oriented in a direction intersecting the opening direction of the recess 25 of the base plate 21, Thus, the striker S is closed. On the other hand, as shown in FIG. 5, when the opening direction of the holding recess 42 of the hook 40 is in the same direction as the opening direction of the recess 25 of the base plate 21, the holding recess 42 and the recess 25 The holding state of releasing the striker S to release it becomes free. When the hook 40 moves from the pinching release state (FIG. 5) to the pinching state (FIGS. 3 and 6), the hook 40 rotates clockwise in the figure, and the pinching state (FIGS. 3 and 6) is released from the pinching release state. When moving to (FIG. 5), it rotates counterclockwise.

  By the way, the hook 40 is provided with a pole abutment receiving portion 43 with which a pole 50 described below abuts in the above-described clamped state. Specifically, the pole abutment receiving portion 43 is located at a holding position where the pole 50 holds the hook 40 (the position of the pole 50 shown in FIGS. 3 and 6). This is the part where the contact end 54 contacts. By this contact, a force (a force that rotates counterclockwise in FIG. 3) in the rotation direction for releasing the clamping state can be supported by the pole 50. That is, when the contact end portion 54 of the pole 50 is in contact with the pole contact receiving portion 43, the contact portion is located on the radial extension in which the pole 50 rotates, and the pole 50 is rotated. The pole contact receiving portion 43 and the contact end portion 54 are designed so as to make contact in a substantially planar shape extending in a substantially tangential direction of movement. In addition, when the pole 50 is rotated and positioned at a release position (a position of the pole 50 shown in FIG. 5) in which the hook 40 is released from being held, the pole contact receiving portion 43 includes a pole. The 50 abutting end portions 54 do not come into contact with each other, and the nipping release state shown in the figure is achieved. The hook 40 is provided with a hanging portion 44 where one end of the spring member 70 is hung at a location close to the pole contact receiving portion 43 described above.

Next, the pole 50 will be described.
When the hook 40 is holding the striker S with the recess 25, the pawl 50 is engaged with the hook 40 in the holding state so as to hold the holding state and is locked. As will be described in detail later, the pole 50 is urged by the turning force from the follow-up plate 60 that is urged to rotate by the spring member 70, and is rotated to a position that holds the clamping state by this urging force. It has become a thing.
That is, as shown in FIGS. 2 and 3, the pole 50 has a disk-shaped part 51a formed in a disk shape and an arm-shaped part 51b formed so as to extend from the disk-shaped part 51a in an arm shape. It has a shape that has become. A pole shaft support hole 55 that is pivotally supported by the above-described second shaft support member 35 is formed in the disk-shaped portion 51a. Further, the tip of the arm portion 51b is set to a contact end portion 54 with which the pole contact receiving portion 43 of the hook 40 contacts.
As shown in the figure, the pole shaft support hole 55 is drilled in a substantially mushroom shape when viewed from the front. The pole rotation shaft support portion 37 of the second shaft support member 35 is inserted therethrough, A pressing dowel (pressing portion) 65 of the push-in plate 60 to be described is a place where it is inserted and arranged. Specifically, the pole shaft support hole 55 includes a shaft support member receiving hole portion 55a (a mushroom-shaped handle portion) through which the second shaft support member 35 for supporting the shaft enters and exits, and an additional plate 60. The pressing dowel 65 is formed so as to be integrated with the pressing dowel moving hole 55b (mushroom-shaped umbrella portion) through which the pressing dowel 65 slides. As will be described later, when the pressing dowel 65 of the push-in plate 60 slides in the pressing dowel moving hole 55b, the pressing dowel 65 is connected to the pressing dowel moving hole 55b and the second shaft support member 35. The pole 50 can be moved in a specific radial direction of the second shaft support member 35 or returned. In other words, the second pivotal support member 35 pivotally supported is inserted into the pole pivotal support hole 55 with play (gap) so that the pole 50 can move in the rotational direction. In addition, the second shaft support member 35 is arranged to be movable in a specific radial direction.
The pawl 50 is for interlocking to forcibly interlock the pawl 50 according to the rotation of the push-in plate 60 when the push-in plate 60 is rotated by pulling the operation cable 80 by the unlocking operation. A locking projection 56 is provided. That is, when the operation cable 80 is pulled based on the unlocking operation to further rotate the driving plate 60 from the rotation position as appropriate, a part of the driving plate 60 is attached to the interlocking locking projection 56 of the pole 50. The interlocking locking projection 56 is pressed in accordance with the further rotation of the follow-in plate 60, and the pawl 50 is forcibly rotated.
The pole 50 is provided with a guide protrusion 57 that is movably fitted into the pole guide hole 27 described above. As shown in FIGS. 2 and 4, the guide projection 57 is provided so as to protrude from the arm-like portion 51 b to the side opposite to the side where the follow-in plate 60 is disposed. The guide projection 57 is movably fitted into the pole guide hole 27 (radial direction guide portion 27a, rotational direction guide portion 27b), so that the pole 50 has a specific diameter of the second shaft support member 35 described above. Movement guidance and rotation guidance are provided in the direction.
In this manner, the pawl 50 can be switched between a holding position for holding the hook 40 in a holding state and a release position for holding the hook 40 in a pinching release state by rotating. Specifically, as shown in FIG. 3 and FIG. 6, when the pole 50 is engaged with the hook 40 in the holding state so as to hold the holding state, the contact end portion 54 of the pole 50. Comes into contact with the pole contact receiving portion 43 of the hook 40, and the position of the pole 50 at this time becomes a holding position for holding the clamped state of the hook 40. Further, as shown in FIG. 5, when the pole 50 is rotated, the contact of the contact end 54 of the pole 50 with the pole contact receiving portion 43 of the hook 40 is released. The position becomes a release position where the hook 40 is in the nipping release state.

Next, the follow-up plate 60 will be described.
The follow-in plate 60 is for rotating the hook 40 in the sandwiched state further in the direction of sandwiching the striker S so that the pre-follow-up state shown in FIG. More specifically, when the push-in plate 60 is rotated by the rotation urging force of the spring member 70, the hook 40 is engaged with the hook 40 so that the hook 40 is further rotated in the direction in which the striker S is further clamped. The joined pole 50 is moved in a specific radial direction of the second shaft support member 35.
Specifically, the follow-up plate 60 is formed in a substantially long plate shape, and a shaft support hole into which the push-in plate rotation shaft support portion 38 of the second shaft support member 35 is inserted and supported on one end side (the lower end side in the drawing). 61 is provided, and the other end side (the upper end side in the drawing) is provided with a hanging portion 62 on which the other end of the spring member 70 is hung, and the rotation biasing force of the spring member 70 with the second shaft support member 35 as a rotation axis. In response to the rotation. Further, in the vicinity of the above-described shaft support hole 61, a substantially rectangular wedge-shaped pressing dowel 65 protruding toward the side where the pole 50 is disposed is provided. The pressing dowel 65 corresponds to a pressing portion according to the present invention provided in the follow-up plate 60, and is inserted into the pole shaft support hole 55 through which the second shaft support member 35 is inserted. Is done. More specifically, the pressing dowel 65 is inserted into the pressing dowel moving hole 55 b in the formed pole shaft support hole 55, and the pressing dowel 65 is pressed according to the rotation of the follow-up plate 60. The inside of the movement hole 55b is slid, and the pressure dowel 65 is slid in the pressure dowel movement hole 55b. The pressing dowel 65 enters between the outer peripheral surface of the second member and the pole 50 holding the clamped state is moved in a specific radial direction of the second shaft support member 35 (the state shown in FIG. 3) or returned. (The state shown in FIG. 6). At this time, the inner peripheral surface of the pressing dowel moving hole 55b to be pressed by the pressing dowel 65 becomes a portion that functions as a pressed portion that presses the pole with the pressing portion according to the present invention.
Further, the follow-up plate 60 is provided with a cable connecting portion 67 for connecting the operation cable 80 at a location close to the hanging portion 62 provided on the other end side (the upper end side in the drawing). One end side of the operation cable 80 is connected to the cable connecting portion 67, and a lock release operation device (not shown) is connected to the other end side of the operation cable 80.

The spring member 70 is configured by a coil spring. One end of the spring member 70 is hung on the hanging portion 44 of the hook 40, and the other end is hung on the hanging portion 62 of the additional plate 60. The spring member 70 hooked in this way urges the hooking portion 44 of the hook 40 and the hooking portion 62 of the additional plate 60 so as to approach each other. That is, the push-in plate 60 is biased so as to rotate in the clockwise direction in the figure, which is the push-in direction.
The operation cable 80 is pulled in the left direction in the figure by a lock release operation. For this reason, the follow-up plate 60 to which one end of the operation cable 80 is connected rotates in the counterclockwise direction in the figure against the rotation biasing force of the spring member 70. In the normal state where the unlocking operation is not performed, the operation cable 80 is maintained in a natural length state that does not affect the urging force of the spring member 70. That is, the push-in plate 60 is biased so as to rotate in the clockwise direction in the drawing in response to the rotational biasing force of the spring member 70.
In this way, due to the rotational biasing force of the spring member 70, the follow-up plate 60 is rotated in the clockwise direction in the drawing, which is the follow-up direction. Then, the pressing dowel 65 also slides in the clockwise direction in the drawing dowel moving hole 55b by the rotation of the follow-up plate 60. For this reason, the pressing dowel 65 enters between the pressing dowel moving hole 55 b and the outer peripheral surface of the second shaft support member 35, and the pole 50 holding the clamped state is inserted into the second shaft support member 35. Move in a specific radial direction. That is, the pole 50 further rotates the hook 40 in the clamped state in the direction in which the striker S is clamped (clockwise in the drawing). Therefore, the striker S is pressed toward the inner peripheral end 26 that is disposed in the concave portion 25 and becomes the innermost part of the arc shape by the hook 40 that rotates in the clamping direction, and the striker to be accommodated is accommodated. Play (backlash) in the recess 25 of S can be eliminated.

According to the locking device 20 of the embodiment configured as described above, the following operational effects can be achieved.
In other words, according to the lock device 20, the push-in plate 60 presses the pole 50 so as to move in the specific radial direction of the second pivotal support member 35 by the rotational force urged by the spring member 70. Since the dowel 65 is provided, the pawl 50 can be pressed to move in the specific radial direction of the second shaft support member 35 by the rotation of the follow-up plate 60, and the direction in which the striker S is further clamped by this pressing. The hook 40 in the clamped state can be further rotated. Here, the pressing dowel 65 provided on the push-in plate 60 and presses the pole 50 so as to move in the specific radial direction of the second shaft support member 35 is a pole shaft support hole 55 through which the second shaft support member 35 is inserted. As a result, the pressed portion that presses the pole 50 with the pressing dowel 65 is formed in the pole shaft support hole 55 without changing the outer shape of the pole 50. A pressing part will be provided. That is, a simple shape can be adopted for the outer shape other than the inside of the pole shaft support hole without providing the pressed portion. Furthermore, since the follow-up plate 60 is also pivotally supported by the second shaft support member 35, a simple shape can be adopted for shapes other than the periphery of the shaft support portion of the add-on plate 60.
Further, according to the locking device 20, the spring member 70 that is hooked on the push-in plate 60 and the hook 40 and biases the push-in plate 60 and the hook 40 closer to each other biases the rotation of the push-in plate 60. At the same time, the pawl 50 is also energized by receiving the rotational force from the energizing plate 60 that is energized in this manner, so that both the pawl 50 and the energizing plate 60 are connected to one spring member 70. Can be energized. As a result, the number of spring members 70 can be reduced to a minimum quantity, and the locking device 20 as a whole can be reduced in size and cost.
In this way, it is possible to simplify the shape of the pole 50 and the follow-up plate 60 and to reduce the size of the pole 50 and further reduce the size of the locking device 20 as a whole. Can be achieved.
Further, according to the locking device 20, the pole 50 that is energized by receiving the rotational force from the follow-up plate 60 is specified by the pole guide hole 27 when the second pivotal support member 35 is in a locked state. It will be guided to move in the radial direction, and in the unlocked state, the rotation of the second shaft support member 35 will be guided while being restricted in the specific radial direction. .
As a result, the pawl 50 energized by the rotational force from the rotationally energized follow-up plate 60 is moved so that the hook 40 acts so as to push the striker S in the locked state. In the unlocked state, it can be moved so as to engage the hook 40 in the clamped state so as to hold the clamped state, so that the movement of the pole 50 can be made stable and reliable. .

The locking device according to the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the scope of the present invention.
That is, in the lock device 20 in the above-described embodiment, the one in which the lock device 20 is provided to the cushion frame 11a will be described. However, the locking device according to the present invention is not limited to this, and any locking device may be used as long as the locking device is provided on an appropriate member disposed in the vehicle. The above-described locking device may be provided.
Further, in the locking device 20 in the above-described embodiment, the pressing dowel 65 is formed to have a substantially rectangular wedge shape, and the pole shaft support hole 55 through which the second shaft support member 35 is inserted in accordance with this is formed. It was something to design. However, the shape of the pressing portion provided in the follow-up plate according to the present invention is not limited to the above example, and may be, for example, a circular shape when viewed from the side. What is necessary is just to design according to the shape.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 11 Seat cushion 11a Cushion frame 12 Connecting device 13 Seat back 14 Headrest 16 Bracket member 20 Locking device 21 Base plate (base member)
23a, 23b 1st support hole 24a, 24b 2nd support hole 25 Recessed part 26 Inner peripheral edge 27 Pole guide hole 27a Radial direction guide part 27b Rotation direction guide part 31 1st axis support member (1st axis)
32a, 32b Support portion 33 Hook rotation shaft support portion 35 Second shaft support member (second shaft)
36a, 36b Support portion 37 Pole rotation shaft support portion 38 Push-in plate rotation shaft support portion 40 Hook 41 Shaft support hole 42 Holding recess portion 42a Inner jaw portion 42b Outer jaw portion 43 Pole contact receiving portion 44 Suspension portion 50 Pole 51a Disc shape Part 51b Arm-like part 54 Abutting end part 55 Pole shaft support hole 55a Shaft support member receiving hole part 55b Pressing dowel moving hole part 56 Interlocking locking convex part 57 Guide protrusion 60 Push-in plate 61 Shaft support hole 62 Suspension part 65 Pressing dowel (pressing part)
67 Cable connecting part 70 Spring member 80 Operation cable F Body floor S Striker

Claims (2)

A locking device that is provided on one of the two members disposed in the vehicle and engages with a striker provided on the other of the two members to lock the two members,
A base member fixedly installed on one of the two members, a hook rotatably supported by a first shaft supported by the base member, and a second shaft supported by the base member. A driving plate and a pole that are pivotally supported, and a biasing spring that is hooked on the driving plate and the hook and biases the driving plate and the hook to approach each other,
The hook is configured to rotate in conjunction with the movement of the striker entering a recess provided in the base member, and is configured to hold the striker with the recess by the rotation.
The pole is urged by the turning force from the additional plate rotated and urged by the urging spring when the hook is in the clamping state with the striker, and is in the clamping state. It is configured to engage and lock the hook so as to hold the sandwiched state,
The push-in plate is moved by the biasing spring to further rotate the hook in the clamping state in the direction of further clamping the striker by the pole engaged with the hook so as to hold the clamping state. A pressing portion that presses the pawl to move in a specific radial direction of the second shaft by a rotationally biased rotational force;
The locking device is characterized in that the pressing portion is inserted and arranged in a pole shaft support hole through which the second shaft is inserted in order to pivotally support the pole. The locking device according to claim 1,
The base member is provided with a pole guide hole in which a guide protrusion provided on the pole is fitted to guide the movement of the pole,
The pole guide hole includes a radial direction guide portion for guiding the movement of the second shaft of the pole in the locked state in the locked state, and unlocking from the locked state. A rotation direction guide portion for guiding the rotation of the pole while restricting the movement of the second shaft in the specific radial direction when in the state. Locking device to do.

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