JP5007605B2 - Unlocking mechanism for vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat unlocking operation mechanism. More specifically, the present invention relates to a vehicle seat unlocking operation mechanism that can release the engagement lock state between the seat body and a floor surface by folding the seat back forward to bring the seat body into a folded state.

2. Description of the Related Art Conventionally, in a vehicle seat, a structure is known in which a seat back that is a backrest is tilted forward or backward to be in a flat state so that the seat body can be raised from a floor surface and stored. Here, Patent Document 1 below discloses a technique in which a seat body is raised sideways from a floor surface and can be stored at a position of a vehicle body wall portion.
In this disclosure, a slide rail mechanism is provided between the seat main body and the floor surface so that the seating position in the front-rear direction with respect to the floor surface of the seat main body can be adjusted and moved. And, through this slide rail mechanism, the seat body is hinged to the floor surface so that it can be turned upside down. The seat body is normally engaged and locked in the posture of lying down on the floor surface. Has been. The seat body is operated by operating a lever provided for the storing operation so that the seat back is brought forward and the engagement lock state with the floor surface (component of the slide rail mechanism) is released. It can be lifted up toward the body wall.
Here, in the configuration in which the seat main body is supported so as to be able to be rotated up and down with respect to the floor surface via the slide rail mechanism as described above, the seating position in the front-rear direction of the seat main body is not at a specific position. And the structure which cannot perform the release operation of the engagement lock by lever operation mentioned above is known. Specifically, when the seating position in the front-rear direction of the seat body is out of a specific position, the lever operation is performed while being swung. Therefore, by adopting this configuration, it is possible to always raise the seat body from the floor surface at a fixed position to be in the retracted state.

JP 2002-370565 A

  However, since the known prior art described above is configured to prohibit the operation of releasing the engagement lock between the seat body and the floor surface by causing the lever to be swung, it seems as if the lever has failed for the user. May give a feeling of operation.

  The present invention has been devised to solve the above-described problems, and the problem to be solved by the present invention is that the seating position of the seat body in the front-rear direction deviates from a specific position where the release operation can be performed Sometimes, it is easy for the user to feel that the user cannot perform a release operation by lever operation.

In order to solve the above problems, the vehicle seat unlocking operation mechanism of the present invention takes the following means.
A first aspect of the present invention is a vehicle seat unlocking operation mechanism capable of releasing an engagement lock state between a seat body serving as a seating portion and a floor surface. Between the seat body and the floor surface, there is a slide rail mechanism that supports the seat body so as to be slidable in the horizontal direction with respect to the floor surface so that the seating position of the seat body can be adjusted. Yes. An engagement / disengagement mechanism is provided between the slide rail mechanism and the seat body so that both can be engaged and locked with each other. The engagement / disengagement mechanism is operated in the release direction by being pushed by a rotating member that rotates in conjunction with the lever operation by performing a lever operation for releasing the engagement lock. ing. The rotating member has an operation part and a pushing part. The operation unit rotates in response to an operation force of lever operation. The pushing portion is connected to the operation portion so as to be able to swing, and the operation portion is always in a state in which the swing motion is restricted by the elastic force of an elastic member provided between the operation portion and the operation portion. And the engagement / disengagement mechanism is pushed in the release operation direction. When the seat body is in a specific seating position by the slide rail mechanism, the rotating member is integrated with the engaging / disengaging mechanism in which the operating portion and the pushing portion are integrated with the lever operation. It is designed to rotate to an operation position where the combined lock state can be released. However, when the seat body is in a state of being out of a specific seating position, the pivoting member is operated to release the pushing portion by the action of a regulating member provided in association with the operating part of the slide rail mechanism. The rotation to the position is restricted. In the rotation restricted state of the pushing portion, the operation portion rotates relative to the pushing portion in a bent manner against the elastic force of the elastic member as the lever operation progresses, and the forced operation from the lever operation is performed. The operation force is elastically released.
According to the first aspect of the invention, when the seat body is in the specific seating position by the slide rail mechanism, the engagement lock state between the seat body and the slide rail mechanism by the engagement / disengagement mechanism is released by the lever operation. Is done. Specifically, the engagement / disengagement mechanism is released by being pushed by a rotating member that rotates in conjunction with a lever operation. At this time, in the rotating member, the swinging motion of the pushing portion relative to the operation portion is restricted by the elastic force of the elastic member, and the operation force when releasing the engagement / disengagement mechanism is secured by the elastic restriction force. . On the other hand, when the seat body is in a state of being deviated from the specific seating position, the engagement lock state of the engagement / disengagement mechanism is not released even if the lever is operated. Specifically, the rotation member at this time is restricted from rotating to the release operation position of the pushing portion by the action of the restriction member provided in the slide rail mechanism, and the release operation of the engagement / disengagement mechanism is prohibited. In this state where the pushing portion is restricted, when the lever operation is further advanced, the operating portion that receives this operating force rotates in a bent manner with respect to the pushing portion against the elastic force of the elastic member. To release the operating force of this lever operation. In this case, since the lever operation is performed against the elastic force of the elastic member, the operation becomes heavy.

Next, the second invention is the above-described first invention, wherein the engagement / disengagement mechanism includes a striker having a frame structure provided on the seat body and a hook provided on the slide rail mechanism and detachable from the striker. And a locking device. The rotation member is provided on the seat body, and the holding member for holding the engagement lock state of the lock device provided in the slide rail mechanism is pushed by the rotation movement to release the engagement lock. It is the composition to do.
According to the second aspect of the present invention, when the turning member is turned by lever operation, the holding member is pushed and the engagement lock state is released. As a result, the striker having a relatively simple configuration in the engagement / disengagement mechanism is disengaged to the seat body side, and the lock device having a large configuration is left on the floor surface side.

Next, according to a third aspect, in the first or second aspect described above, the lever operation for releasing the engagement lock state of the engagement / disengagement mechanism is performed by an operation force by a manual operation. .
According to the third aspect of the present invention, when the lever is manually operated to release the engagement lock state of the engagement / disengagement mechanism when the seat body is in a state of being deviated from the specific seating position, The feeling of operation is heavy.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first aspect of the invention, when the seating position of the seat body in the front-rear direction is out of a specific position where the release operation can be performed, the lever operation is heavier than the operation force during the normal release operation. As a result, it is possible to make it easier for the user to feel that the user cannot perform a release operation by lever operation.
Further, according to the second invention, the striker having a relatively simple structure in the engagement / disengagement mechanism is disposed on the seat body side, and the locking device having a large structure is disposed on the slide rail mechanism side, thereby providing a floor surface. It is possible to simplify the components on the side of the seat body that are used after being disengaged from each other.
Furthermore, according to the third aspect, since the lever operation is performed by manual operation, the operator can directly feel the feeling that the lever operation becomes heavy.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

First, the configuration of the unlocking mechanism for a vehicle seat according to the first embodiment will be described with reference to FIGS.
Here, in FIG. 1, a schematic configuration of the vehicle seat of the present embodiment is shown in a perspective view. The vehicle seat is disposed as a rear seat of the vehicle, and includes a seat back 2 serving as a backrest constituting the seat body 1 and a seat cushion 3 serving as a seating portion. The seat back 2 is connected to the seat cushion 3 by reclining devices 6 and 6 provided at lower portions of both sides in the width direction. Thereby, the seat back 2 can adjust the backrest angle with respect to the seat cushion 3 or can be moved forward to the upper side of the seat cushion 3.

These reclining devices 6 and 6 are normally held in a locked state in which the backrest angle of the seat back 2 is fixed. And each reclining device 6 and 6 is operation (pulling operation) which pulls back the operation lever L arrange | positioned in the lower position of the left side (side shown in the figure front) of the seat cushion 3 back. By performing the above, the above lock states are released all at once.
Here, in each of the reclining devices 6 and 6, the operation parts for unlocking each other are connected by rod parts (not shown), and the switching between the lock and the release is performed synchronously on the left and right. Accordingly, by pulling the operation lever L rearward, the reclining devices 6 and 6 are unlocked all at once, and the fixed state of the backrest angle of the seat back 2 is released. Can be done.

Here, a spring member (not shown) is hooked between the seat back 2 and the seat cushion 3, and is normally urged in the forward rotation direction. Therefore, when the operation lever L is pulled rearward in a state where no occupant is seated on the seat body 1, the seat back 2 is automatically tilted forward by the above urging and folded on the upper side of the seat cushion 3. It is like that.
Each of the reclining devices 6 and 6 described above is normally biased in the operation direction that is locked, and is automatically returned to the locked state when the operation lever L is stopped. Yes. However, the reclining devices 6 and 6 further include a lock zone that is returned to the locked state by stopping the turning operation of the operating lever L, and a free zone that is not returned to the locked state even if the turning operation of the operating lever L is stopped. , Is set.

The former lock zone is normally set in an angular region that is used as a backrest by the occupant seated on the seat body 1, and the seat back 2 is in the upright position and the seat back 2 is fully rearward. It is set in an area between the turned-down rotation position. The latter free zone is set in an angular region where the occupant is not seated and used, and the rotation position where the seat back 2 is in an upright position and the rotation when the seat back 2 is fully pushed forward. It is set in the area between the moving position.
Therefore, when the seat back 2 is moved forward, the operation lever L is pulled rearward so that the seat back 2 is tilted forward as much as possible. It is automatically pushed down to the position where it is folded to the upper side of 3.

By the way, the operation lever L described above can be operated until the fixed state of the backrest angle of the seat back 2 is released by a single operation pulled backward. However, the operation lever L is switched to a state in which the operation can be performed to the further rear rotation region when the seat back 2 is brought forward. Accordingly, when the operation lever L is further rotated, the engagement lock state of the seat body 1 with the floor surface F is released, and the seat body 1 is raised from the floor surface F in the folded posture state. It is like that.
The seat body 1 is raised toward the vehicle body wall B adjacent to the right side in the drawing. As a result, a space on the floor surface F on which the seat main body 1 has been installed is vacated, and this installation space can be used as another target space such as a cargo space.

On the other hand, when the operation of the operation lever L is stopped when the seat back 2 is moved forward, the seat body 1 is kept on the floor surface F while being in the folded posture. Thereby, it becomes possible to use the back surface (upper surface of the seat body 1) of the seat back 2 that has been brought forward as the table surface.
As described above, the lever structure of the operation lever L of the present embodiment is such that the seat body 1 is kept on the floor surface F in a folded posture by rotating the one operation lever L, and further from the floor surface F The operation for proper use such as releasing the engagement lock state with F can be performed.

Here, between the seat main body 1 and the floor surface F described above, slide rail mechanisms 50 and 50 that allow the seating position in the vehicle front-rear direction to the floor surface F of the seat main body 1 to be adjusted are disposed. The slide rail mechanisms 50 and 50 are provided as a pair on the left and right between the seat cushion 3 and the floor surface F.
Specifically, each of the slide rail mechanisms 50, 50 includes a lower rail 51, 51 fixedly installed on the floor surface F, an upper rail 52, 52 fixedly installed on a component on the seat body 1, and both upper rails 52, 52. And a slide lock device 53 capable of restricting or releasing the slide movement. The slide lock device 53 is provided only in the slide rail mechanism 50 shown on the right side in FIG. Here, the lower rails 51 and 51 are formed in the shape extended in the vehicle front-back direction. The upper rails 52 and 52 are fitted into the lower rails 51 and 51 so as to be slidable in the rail length direction, and the seating position of the seat body 1 is changed in the vehicle front-rear direction along with the sliding movement. It is supposed to be moved to.

These upper rails 52 and 52 are normally held in a locked state in which the slide movement is restricted by the operation of the slide lock device 53. However, the upper rails 52 and 52 are switched to a slidable state by simultaneously releasing the locked state by the slide lock device 53 by operating a release lever (not shown) provided in the seat body 1.
Therefore, the seating position of the seat main body 1 can be moved and adjusted by sliding the upper rails 52, 52 in the vehicle front-rear direction in the state where the release lever is operated. Then, if the lever operation of the release lever is stopped thereafter, the slide lock device 53 can be returned to the locked state and the seat body 1 can be held in the adjusted seating position. A specific configuration of the slide rail mechanisms 50 and 50 will be described in detail later.

As described above, in the configuration of this embodiment, the seat body 1 is supported so as to be able to be turned up and down with respect to the floor surface F via the slide rail mechanisms 50 and 50.
Specifically, in the seat main body 1, the left side portion of the seat cushion 3 is hinge-connected to the upper rail 52 by the hinge mechanism 4 so as to be able to be rotated up and down. The seat body 1 is supported in such a state that the right side portion of the seat cushion 3 can be engaged and locked with the upper rail 52 by the support mechanism 5 having a flat support plate 5t. Has been.
As a result, the seat body 1 is normally engaged and locked in a posture state in which the seat cushion 3 is lying on the floor surface F. Then, as described above, the seat body 1 is switched to the folded posture state by the forward movement of the seat back 2 by performing the operation of pulling the operation lever L backward. The seat body 1 is configured to release the engagement lock state between the support plate 5t and the upper rail 52 by performing an operation of pulling the operation lever L further rearward from the folded posture state. . Therefore, by performing this operation, the seat body 1 can be raised from the floor surface F in the folded posture state.

By the way, the operation of releasing the engagement lock state between the seat body 1 and the floor surface F by the operation lever L described above cannot be performed unless the seat body 1 is in a specific seating position by the slide rail mechanisms 50 and 50. It has become. That is, when the seat body 1 is in the slide position state deviating from the specific seating position described above, the engagement lock state is not released even if the operation lever L is operated.
As a result, the seat body 1 is always raised from a certain position in the vehicle longitudinal direction.
Hereinafter, the structure of the seat body 1 and the lever structure of the operation lever L will be described in detail.

In other words, the left side of the seat body 1 is supported by the hinge mechanism 4 that hinges the seat cushion 3 and the upper rail 52, so that the seat body 1 can be turned upside down. The hinge mechanism 4 is assembled with a winding spring 4s that urges the seat body 1 in the direction of raising the seat body 1 from the floor surface F.
Accordingly, the seat body 1 is lifted from the floor surface F by the urging force of the winding spring 4s by releasing the engagement lock state between the support mechanism 5 and the upper rail 52 on the right side of the figure described above, and the vehicle body wall It is held in an upright posture at the position of part B.
Here, the support mechanism 5 is provided on the bottom surface portion 3b of the seat cushion 3 so as to be housed and deployable. When the seat body 1 falls to the floor surface F, the support mechanism 5 is in an upright state so that the seat body 1 is placed on the floor surface F. It comes to support it.

Specifically, the support mechanism 5 has a configuration in which a flat plate-like support plate 5t is hingedly connected to the bottom surface portion 3b of the seat cushion 3 so as to be able to turn up and down. This support plate 5t is normally urged and deployed in a direction to stand perpendicular to the bottom surface portion 3b.
Therefore, when the seat body 1 is in a state of lying on the floor surface F, the support plate 5t is in an unfolded state in which the seat body 1 is suspended straightly with respect to the bottom surface portion 3b of the seat cushion 3 by the above urging force. Supports F from below. However, when the seat body 1 is raised from the floor surface F, the support plate 5t is pulled by a pulling member (not shown) such as a wire coming from the vehicle body side in conjunction with this movement. The cushion 3 is folded into the bottom surface portion 3b and stored in the storage recess 3d.

Here, strikers 5s and 5s that can be engaged with the hooks 61 and 71 of the locking devices 60 and 70 installed on the upper rail 52 are respectively arranged at the front and rear end portions (lower end portions) of the support plate 5t. It is installed. The strikers 5s and 5s come into contact with the hooks 61 and 71 by the movement of dropping the seat body 1 onto the floor surface F, and are further pushed in the direction in which they are hooked to be locked in that state. ing. Therefore, the seat main body 1 is held in an engaged and locked state so as not to be raised from the floor surface F by the engagement between the strikers 5s and 5s and the hooks 61 and 71.
The hooked state of the hooks 61, 71 with the strikers 5s, 5s (engagement locked state) can be released by pulling the operation lever L to the rear side. As a result, the seat body 1 is raised from the floor surface F by the urging force of the winding spring 4s provided in the hinge mechanism 4 described above and is in a posture state where the seat body 1 stands at the position of the vehicle body wall portion B.

Next, the lever structure of the operation lever L will be described. Here, in FIG. 2, the lever structure of the operation lever L is schematically shown by a side view. 3 to 7 show the lever structure of the operation lever L in an enlarged manner. FIG. 8 is an exploded perspective view showing the lever structure of the operation lever L.
As shown in FIG. 8, this lever structure is assembled to a cushion frame 3 f that forms the skeleton of the seat cushion 3. In this lever structure, when the operation lever L is pulled backward, the switching shaft 6r protruding from the illustrated one side reclining device 6 is pivotally operated, and both the reclining devices 6 are operated. , 6 are simultaneously released.

Here, the illustrated reclining device 6 is disposed so as to be sandwiched between plate surfaces between the back frame 2f constituting the skeleton of the seat back 2 and the cushion frame 3f described above. Are connected to each other. In the reclining device 6, a switching shaft 6r for switching the operation state of the lock described above is inserted in the plate thickness direction so as to protrude to the outside of the cushion frame 3f. And the switching arm 6a is integrally fitted and attached to the tip of the switching shaft 6r protruding. The switching arm 6a is inserted into the switching shaft 6r and is secured to the switching shaft 6r by mounting a fixing ring 6t from the rear side thereof.
As a result, the switching shaft 6r is pivoted by the movement of the switching arm 6a so that the operating states of the reclining devices 6 and 6 can be switched. Specifically, the switching arm 6a is in the initial position in which the reclining devices 6 and 6 shown in FIG. 3 are locked by the urging force of a spring member (not shown) that is normally assembled to the reclining devices 6 and 6. Is held in. Then, the switching arm 6a is rotated counterclockwise by rotating the operation lever L as shown in FIG. 4, thereby rotating the switching shaft 6r to rotate each reclining device 6, respectively. 6 lock state is released. Specifically, in the rotation operation position of the switching arm 6a in which the reclining devices 6 and 6 are unlocked, the operation lever L is rotated to the first rotation position indicated by the phantom line in FIG. This is the operating position when
Note that the reclining devices 6 and 6 are in the above-described free zone state when the locked state is released and the seat back 2 is moved forward as described above. Therefore, as shown in FIG. 7, the switching arm 6a is not returned to the original initial position even if the rotation operation is stopped, and is held in the illustrated position of the rotation operation.

Returning to FIG. 3, the upper end of the swing arm 6b is linked to the lower end of the switching arm 6a by a connecting shaft 6p. The connecting shaft 6p is integrally coupled to the swing arm 6b, and is connected to the switching arm 6a so as to be pivotally supported. Thereby, the swing arm 6b is in a state in which it can freely rotate in the clockwise direction or counterclockwise direction as shown in the same direction as the rotation direction of the switching arm 6a.
However, the swing arm 6b is formed with a stopper bs that restricts the rotation of the switching arm 6a in the clockwise direction in the drawing at an intermediate position. As shown in FIG. 8, the stopper bs is formed by partially bending the plate surface portion of the swing arm 6b in the plate thickness direction. Similarly, the stopper as is bent on the switching arm 6a. , The rotation of the swing arm 6b is restricted.

Returning to FIG. 3, between the swing arm 6b and the switching arm 6a, a winding spring 6u that urges the swing arm 6b to rotate in the clockwise direction is hooked. One end of the winding spring 6u is hooked and fitted on the head of the connecting shaft 6p integrated with the swing arm 6b described above, and the other end is hooked and attached to the switching arm 6a. It has been. As a result, the swing arm 6b is held in a posture in which the stoppers bs and as described above are brought into surface contact with each other as a state in which the swing arm 6b is urged to rotate in the clockwise direction in the figure with respect to the switching arm 6a.
An engagement pin 6c is attached to the lower end of the swing arm 6b. As shown in FIG. 8, the engaging pin 6c is attached to the swing arm 6b by being inserted in the thickness direction, and the cylindrical roller 6e is inserted into the fixing ring 6f. It is fixed and secured. Thereby, the roller 6e inserted in the engagement pin 6c is attached to the engagement pin 6c so as to be idled. The roller 6e attached to the engagement pin 6c is provided as a functional component that receives an operation force when a later-described operation lever L is rotated.

As shown in FIG. 8, the cushion frame 3f is assembled with functional parts for performing the turning operation of the switching arm 6a.
Specifically, first, a flat base plate 7 serving as a base for assembly is integrally attached to the cushion frame 3f. The base plate 7 is fastened and fixed to the cushion frame 3f by two bolts 7b and 7b.
The base plate 7 is formed with a forward tilt stopper 7s for restricting the forward tilt movement of the seat back 2 at a portion on the left shoulder side in the figure. As shown in FIG. 5, the forward tilt stopper 7s is configured such that when the seat back 2 is tilted forward, an L-shaped pushing member 2b provided integrally with the back frame 2f is pressed against the seat. The movement of the back 2 is regulated.

Returning to FIG. 8, a long hole 7 h extending in the vertical direction in the figure is formed through the plate thickness at a portion immediately below the forward-falling stopper 7 s. The long hole 7h functions as a guide for fitting a slide pin 43 attached to a release member 40 described later so as to be slidable.
And the hook part 7c of the shape which the plate shape protruded partially in the shape of an arm is formed in the site | part on the right shoulder side of the base plate 7 of illustration. The hook 7c functions to hook and fix the resin cover when a resin cover (not shown) is attached to the seat cushion 3.
And the cable hook part 7w for hooking the edge part of the outer member 9b of the 1st cable 9 mentioned later is formed in the edge part of the lower left side of the base board 7 of illustration. The cable hook portion 7w is formed by partially bending the plate shape of the base plate 7.

A first bracket 10 made of an arm-shaped plate member is pivotally connected to the base plate 7 by a support shaft 8 so as to be rotatable. The support shaft 8 is integrally coupled to the base plate 7, and is connected to the first bracket 10 so as to be pivotally supported. The end of the arm-shaped operation lever L described above is integrally attached and fixed to the first bracket 10. As a result, the first bracket 10 is rotated integrally with the operation lever L.
As shown in FIG. 3, between the first bracket 10 and the base plate 7, a winding spring 8b that urges the first bracket 10 to rotate in the clockwise direction is hooked. One end of the winding spring 8b is fitted and hooked on the head of the support shaft 8 integrated with the base plate 7 described above, and the other end is hooked on the first bracket 10 and attached. It has been. As a result, the first bracket 10 is in a state in which it is urged to rotate clockwise with respect to the base plate 7 as shown in FIG. Is held as a posture state.

The first bracket 10 is formed with an operation portion 11 that can push and operate the roller 6e attached to the engagement pin 6c of the swing arm 6b described above at the tip of the arm shape. As shown in FIG. 4, when the operating lever L is rotated counterclockwise as shown in FIG. 4, the operating portion 11 presses the roller 6e to integrally connect the swing arm 6b and the switching arm 6a. Push and move. As a result, the switching arm 6a can be rotated in the clockwise direction in the figure to release the locked state of the reclining devices 6 and 6.
Returning to FIG. 8, the engagement pin 12 is attached to the arm portion of the first bracket 10. This engagement pin 12 is inserted and attached to the first bracket 10 in the plate thickness direction, and a cylindrical roller 13 is inserted at a point where the engagement pin 12 is inserted, and is fixed to a fixing ring 14 and is prevented from being detached. Yes. Thereby, the roller 13 inserted in the engagement pin 12 is attached to the engagement pin 12 so as to be idled.
As shown by the solid line state in FIG. 4, the roller 13 attached to the engagement pin 12 is abutted against a contact surface 31 of a regulating member 30 described later when the operation lever L is rotated. Thereby, the turning operation of the operation lever L is regulated at a position where the roller 13 is abutted against the regulating member 30. Here, the roller 13 is attached to the engagement pin 12 so as to be idled, and the biting direction acts so that no biting occurs between the two when the roller 13 is in contact with the regulating member 30. It is configured to release power by idling. Thus, the operation of abutting or separating the roller 13 against the regulating member 30 can be performed smoothly.

Incidentally, the restricting member 30 that constitutes a restricting structure for restricting the turning operation of the operating lever L is formed of an arm-shaped plate member as shown in FIG. The restricting member 30 is pivotally connected to the base plate 7 by a support shaft 32 so as to be rotatable. The support shaft 32 is integrally coupled to the base plate 7 and is connected to the restricting member 30 so as to be pivotally supported.
The support shaft 32 is inserted with a cylindrical stopper 34 that contacts the operation lever L that is urged to rotate in the clockwise direction shown in the drawing. This stopper 34 is attached to the support shaft 32 in a state in which it can idle, and when it comes into contact with the operating lever L, the stopper 34 is idled so that it does not bite between the two. It is configured to escape through exercise. As a result, the operation of bringing the operating lever L into and out of contact with the stopper 34 can be performed smoothly.
As shown in FIG. 3, a winding spring 33 is provided between the regulating member 30 and the base plate 7 to urge the regulating member 30 in the clockwise direction in the drawing. One end of the winding spring 33 is fitted and hooked on the head of the support shaft 32 integrated with the base plate 7 described above, and the other end is hooked and attached to the regulating member 30. ing. As a result, the restricting member 30 is held in a rotating position where the sliding movement of the release member 40 connected thereto is restricted as a state in which the restricting member 30 is urged to rotate clockwise with respect to the base plate 7. Yes.

The release member 40 is formed of an arm-shaped plate member as shown in FIG. The lower end portion of the release member 40 is pivotally connected to the arm portion on the left side of the regulating member 30 by a connecting pin 42 so as to be rotatable. The upper end of the release member 40 is connected to the base plate 7 by a slide pin 43 so as to be slidable. The slide pin 43 is inserted into a long hole 7h formed in the base plate 7, and is slidable in the illustrated vertical direction in which the long hole 7h extends. As a result, the release member 40 swings up and down while sliding the slide pin 43 within the long hole 7h as the restricting member 30 rotates.
As shown in FIG. 3, the release member 40 is configured to cause the slide pin 43 to reach the upper end of the long hole 7 h by receiving a movement in which the restricting member 30 is normally urged to rotate clockwise in the drawing. The movement is restricted at different positions. As a result, the regulating member 30 is held in a pivot position where the pivoting operation of the illustrated operating lever L can be regulated.

By the way, a pressure receiving portion 41 is formed at the upper end edge of the release member 40 to receive the movement of the seat back 2 being tilted forward. The pressure receiving portion 41 is formed by partially bending the plate shape of the release member 40.
Specifically, in the initial position where the slide pin 43 is located at the upper end of the long hole 7h, the pressure receiving portion 41 is located at a position protruding upward in the figure from the forward tilt stopper 7s formed on the base plate 7 described above. Has been placed. Therefore, as shown in FIG. 5, when the seat back 2 is tilted forward, the pressure receiving portion 41 is pushed down by the pushing member 2 b provided on the back frame 2 f described above and pushed down in the drawing. As a result, the entire release member 40 is pushed and moved in the same direction, and the regulating member 30 is rotated in the counterclockwise direction shown in the drawing. Thus, the restricting member 30 is retracted to a position where the restricting state of the rotation operation of the illustrated operation lever L is released.

Therefore, when the regulating member 30 is retracted as described above, the operation lever L can be further rotated.
Here, the abutting surface 31 of the restricting member 30 described above is formed in a curved surface shape that draws an arc centering on a support shaft 32 that is the center of rotation. Thereby, when the seat back 2 is tilted forward, the regulating member 30 is smoothly removed from the abutting state with the rollers 13 attached to the engaging pins 12 of the first bracket 10. On the other hand, the roller 13 is also attached to the engagement pin 12 so as to be idled, and the biting direction acts so that no biting occurs between the two when the roller 13 is in contact with the regulating member 30. It is configured to release power by idling. Thereby, the operation which removes the regulating member 30 from the abutting state with the roller 13 by rotation can be performed smoothly.

Here, returning to FIG. 8, the second bracket 20 made of an arm-like plate member is also pivotally supported on the support shaft 8 that pivotally supports the first bracket 10 described above. . The upper end of the second bracket 20 is pivotally connected to the support shaft 8. Thereby, the 2nd bracket 20 is made into the state which can be freely rotated in the illustrated clockwise direction or the counterclockwise direction which is the same as the rotation direction of the first bracket 10.
A cable hook portion 21 for hooking the end portion of the inner member 9a of the first cable 9 is formed at the lower end portion of the second bracket 20. The cable hook portion 21 is formed by partially bending the plate shape of the second bracket 20.

The arm portion of the second bracket 20 is formed with an engagement piece 22 that partially extends in the plate thickness direction. As shown in FIG. 4, the engaging piece 22 is formed so as to protrude from the right edge of the second bracket 20 in the figure, and when the operation lever L is rotated counterclockwise in the figure. The first bracket 10 is in contact with the edge of the first bracket 10.
As shown in FIG. 6, the second bracket 20 is integrated with the first bracket 10 in such a manner that the second bracket 20 is pushed by the first bracket 10 by a movement that further advances the turning operation of the operation lever L. Are rotated in the same direction. As a result, the second bracket 20 pulls the end of the inner member 9a hooked to the lower end of the second bracket 20 and pulls the first cable 9 in such a manner as to pull it out from the end of the outer member 9b. ing.

Here, returning to FIG. 8, the first cable 9 has a double structure in which the linear inner member 9a is inserted into the tube of the tubular outer member 9b. One end of each of the inner member 9a and the outer member 9b is integrally hooked to the second bracket 20 and the base plate 7 as described above. The other end of the inner member 9a and the outer member 9b is an unlocking operation mechanism 80 which is an operation mechanism for releasing the hooks 61 and 71 described above with reference to FIG. 2 from the locked engagement state with the strikers 5s and 5s. It is hung on. The specific configuration of the unlocking operation mechanism 80 will be described in detail later.
Accordingly, when the first cable 9 is pulled at one end thereof to pull out the inner member 9a from the outer member 9b, the first cable 9 transmits this operating force to the unlocking operation mechanism 80 and engages the hooks 61 and 71. The lock state can be released.
As shown in FIG. 3, the second bracket 20 hooked to one end of the inner member 9a is hooked to the other end of the inner member 9a in the initial state before the rotation operation. By receiving the action of the holding force held in the initial position state from the unlocking operation mechanism 80, it is held in the initial rotation position state shown in FIG.

Next, the configuration of the unlocking operation mechanism 80 and the lock devices 60 and 70 operated by this mechanism will be described.
Here, first, the outline of the configuration of the unlocking operation mechanism 80 will be briefly described with reference to FIG. That is, the unlocking operation mechanism 80 is assembled to the support plate 5t of the support mechanism 5 described above, and the first rotation member 81 and the second rotation illustrated in FIG. The member 82 is rotated in conjunction with the member 82. As a result, the holding members 62 and 72 of the lock devices 60 and 70 provided in the slide rail mechanism 50 are operated by being kicked, and the engagement lock states of the lock devices 60 and 70 are released all at once. It has become so.
The unlocking operation of the locking devices 60 and 70 by the pulling operation of the first cable 9 is formed in the recesses 52s1 and 52s2 formed in the upper rail 52 of the slide rail mechanism 50 and the lower rail 51 as shown in FIG. This can be performed when the recesses 51s1 and 51s2 are in a positional relationship that matches each other. However, as shown in FIG. 12, when the positional relationship between the recesses 52s1, 52s2 and the recesses 51s1, 51s2 is shifted from each other due to the sliding movement of the upper rail 52, the first cable 9 Even if the towing operation is performed, the unlocking operation of each lock device 60, 70 cannot be performed.

Here, the structure of the slide rail mechanism 50 provided with each locking device 60 and 70 mentioned above is demonstrated concretely. As shown in FIG. 9, the slide rail mechanism 50 is configured such that the upper rail 52 is guided so as to be slidable in the front-rear direction with respect to the lower rail 51 having a U-shaped enclosed cross section.
Specifically, the lower rail 51 is formed in a certain cross-sectional shape as shown in the figure by bending a single flat plate member made of steel material in some places. Specifically, the cross-sectional shape of the lower rail 51 is well shown in FIG. As shown in the figure, the lower rail 51 includes a flat plate-shaped lower surface portion 51u, flat plate-shaped right side surface portions 51x1 and left side surface portions 51y1 rising from both sides thereof, and a flat plate shape that folds down and hangs down from the upper ends thereof. Are formed in a cross-sectional shape including a right turn surface portion 51x2 and a left turn surface portion 51y2. Here, the right turn surface portion 51x2 corresponds to the regulating member of the present invention.
Returning to FIG. 9, a plurality of through holes 51 h... Penetrating in the plate thickness direction over the longitudinal direction are arranged at equal intervals on the left return surface portion 51 y 2.
Then, in two portions in the front-rear direction of the lower rail 51, concave portions 51s1 and 51s2 are formed by partially cutting out the bottom portion of the right turn surface portion 51x2. The concave portions 51s1 and 51s2 are formed in shapes that can receive the leg portions 62d and 72d when the holding members 62 and 72 of the locking devices 60 and 70 described later are kicked.

On the other hand, the upper rail 52 is formed in a cross-sectional shape as shown in the figure by bending a single flat plate member made of a steel material in some places. Specifically, the cross-sectional shape of the upper rail 52 is well shown in FIG. As shown in the figure, the upper rail 52 includes a flat plate-shaped right side surface portion 52a1 and a left side surface portion 52b1 that hang straight down in a manner that the plate surfaces face each other, and a right fin surface portion 52a2 that is flipped outward from the lower ends thereof. And a left fin surface portion 52b2.
Returning to FIG. 9, in two portions of the upper rail 52 in the front-rear direction, recesses 52 s 1 and 52 s 2 are formed by partially cutting out the bottom of the right side surface portion 52 a 1. The recesses 52s1 and 52s2 are formed corresponding to the shapes of the recesses 51s1 and 51s2 formed in the lower rail 51, respectively, and the holding members 62 and 72 of the lock devices 60 and 70 are kicked. In this case, these leg portions 62d and 72d are formed in a shape that can be received.
And in the surface part near the center of the above-mentioned left side surface part 52b1 in the front-back direction, three through holes 52h... Penetrating in the plate thickness direction are arranged at equal intervals along the longitudinal direction. The spacing between the through holes 52h is the same as the spacing between the through holes 51h formed in the lower rail 51 described above. The shape of the upper rail 52 in the vicinity of the center of the upper rail 52 in which the through holes 52h are formed is formed without the right fin surface portion 52a2 or the left fin surface portion 52b2.

A slide lock device 53 having a lock claw 53c that can be inserted into each through hole 52h... Is disposed at the center of the upper rail 52 where the through holes 52h.
Here, the lock claw 53c has three claw shapes that can be inserted into the respective through holes 52h... And is pivotally connected to the upper rail 52 by a support shaft 53d as shown in FIG. Has been. The lock claw 53c is normally biased in a direction in which the claw shape at the tip thereof is inserted into each through hole 52h... By a biasing force of a spring member (not shown).
Therefore, as shown in FIG. 13, when the sliding position of the upper rail 52 becomes a position state in which the through holes 52h formed in the upper rail 52 and the through holes 51h formed in the lower rail 51 coincide with each other, The lock claw 53c of the slide lock device 53 is inserted into the through holes 52h, 51h,. Thus, the slide rail mechanism 50 is held in a slide lock state in which the slide movement of the upper rail 52 is restricted.

The slide lock state of the slide rail mechanism 50 is released by swinging the operating arm 53a provided adjacent to the lock claw 53c as shown in FIG. As shown in FIG. 10, the operating arm 53a is pivotally connected to the upper rail 52 by a support shaft 53b, and a pressing portion for pressing and operating the lock claw 53c at the tip of one arm. ay is formed. And the receiving part ax which receives pushing operation from the L-shaped link 92 of the slide lock release operation mechanism 90 mentioned later is formed in the front-end | tip of the other arm of the operation arm 53a. The operating arm 53a is normally urged in a direction opposite to the direction in which the lock claw 53c is pushed and operated by a biasing force of a spring member (not shown) and is held in a position apart from the lock claw 53c. .
On the other hand, the lock claw 53c is integrally provided with a plate-like protruding plate ct that is pushed by a pushing portion ay formed on the operation arm 53a. Accordingly, as shown in FIG. 13, the lock claw 53c is released from the locked state in such a manner that the protruding plate ct is pushed up by the pressing portion ay in accordance with the movement of the operating arm 53a. It has become.

In the slide rail mechanism 50 configured as described above, as shown in FIG. 11, the slide position of the upper rail 52 is a position where the recesses 52s1 and 52s2 formed in the upper rail 52 and the recesses 51s1 and 51s2 formed in the lower rail 51 coincide with each other. In the case of the relationship, the rotational movement of the holding members 62 and 72 of the lock devices 60 and 70 in the releasing operation direction is permitted. In other words, in a state where the recesses 52s1, 52s2 and the recesses 51s1, 51s2 are matched, when the holding members 62, 72 are pushed and moved in the clockwise direction in the drawing, their leg portions 62d, 72d are recessed 52s1, 52s2, This is because the recesses 51s1 and 51s2 respectively accept the recesses.
However, as shown in FIG. 12, when the slide position of the upper rail 52 is in a positional relationship in which the recesses 52s1 and 52s2 of the upper rail 52 and the recesses 51s1 and 51s2 of the lower rail 51 are shifted from each other, The rotational movement of the holding members 62 and 72 in the releasing operation direction is restricted. That is, when the recesses 52s1 and 52s2 and the recesses 51s1 and 51s2 are displaced, the holding members 62 and 72 are pushed and moved in the clockwise direction or the counterclockwise direction in the drawing, so that the leg portions thereof are moved. This is because 62d and 72d are not received in the recesses 51s1 and 51s2 of the lower rail 51, but abut against the bottom surface of the right turn surface portion 51x2 and the rotation thereof is restricted. Therefore, in this case, even if the first cable 9 is pulled, the locking devices 60 and 70 cannot be released.

Here, a specific configuration of each of the locking devices 60 and 70 will be described. In addition, although each locking device 60 and 70 is arrange | positioned in the direction which mutually differs before and behind, those basic structures are the same. Therefore, in the following description, a specific configuration will be described only for the locking device 60 disposed on the front side of the vehicle shown on the right side in FIG. 9, and the configuration for the locking device 70 on the rear side. The detailed description is omitted here. The locking device 60 disposed on the front side of the vehicle is disposed on the left side as viewed in FIG.
The lock device 60 includes a hook 61 formed of a steel plate, a holding member 62, and a tension spring 63 hooked between them. The hook 61 and the holding member 62 are disposed at positions sandwiched between the right side surface portion 52a1 and the left side surface portion 52b1 of the upper rail 52. The hook 61 is pivotally connected to the upper rail 52 by a support shaft 61a, and the holding member 62 is also pivotally connected to the upper rail 52 by a support shaft 62a. The hook 61 and the holding member 62 are normally urged to rotate in the direction in which they are attracted by the urging force of the tension spring 63 hooked between them. Here, one end of the tension spring 63 is hooked on the head 61 c of the hook 61, and the other end is hooked on the head 62 c of the holding member 62.

The hook 61 described above is formed with a locking projection 61b whose shape partially protrudes at the peripheral edge thereof. The holding member 62 is formed with a locking recess 62b whose shape is partially recessed at its peripheral edge. The locking convex portion 61b and the locking concave portion 62b are in a state where the hook 61 and the holding member 62 are attracted to each other by the above-described urging force, and the concave and convex shapes are engaged with each other to engage each other. It becomes. As a result, the hook 61 and the holding member 62 are held in an engagement lock state in which mutual rotational movements are regulated.
As shown in FIG. 11, the engagement lock state between the hook 61 and the holding member 62 is rotated in a direction in which the holding member 62 is pulled away from the hook 61, so that the locking protrusion 61 b is locked. It is released by releasing the fitting with the recess 62b.
Here, as shown in the figure, the hook 61 is formed with a receiving portion 61d on the lower surface of the opening for receiving the striker 5s. The receiving portion 61d comes into contact with the striker 5s by the movement of the seat body 1 dropped onto the floor surface F, and is pushed downward in the figure by the striker 5s. As a result of this pushing, the striker 5s enters the opening shape of the hook 61, and the hook 61 is pushed in the clockwise direction in the figure so that the locking projection 61b enters the locking recess 62b of the holding member 62. It becomes a locked state. At this time, with the rotation of the hook 61, the pressing portion 61e formed on the upper surface portion of the opening portion is in a state of wrapping around the back portion of the striker 5s. As a result, the striker 5s is held in a state where it is retained by the hook 61 as a state where the striker 5s is hooked on the hook 61.

  The lock device 70 on the other side has the same configuration as the lock device 60 described above. That is, the lock device 70 includes a hook 71, a holding member 72, and a tension spring 73. The hook 71 is pivotally supported by a support shaft 71a, and has a locking projection 71b, a head 71c, a receiving portion 71d, and a pressing portion 71e. The holding member 72 is pivotally supported by a support shaft 72a, and is formed in a shape having a locking recess 72b, a head portion 72c, and a leg portion 72d.

Next, the configuration of the lock release operation mechanism 80 that performs the release operation of the engagement lock state of the lock devices 60 and 70 will be described.
As shown in FIG. 10, the unlocking operation mechanism 80 includes a first rotating member 81, a second rotating member 82, and a connecting link 83. Here, the 1st rotation member 81 and the 2nd rotation member 82 are equivalent to the rotation member of this invention, respectively.
The first rotating member 81 is configured by being divided into a first operating portion 81a and a first pushing portion 81b, and these can be rotated to the support plate 5t of the support mechanism 5 by a support shaft 81c. It is pivotally connected. Here, the 1st operation part 81a is equivalent to the operation part of this invention, and the 1st pushing part 81b is equivalent to the pushing part of this invention.
The support shaft 81c is integrally coupled to the first operation portion 81a, and is connected to the first pushing portion 81b so as to be pivotally supported. As a result, the first pushing portion 81b can freely rotate in the illustrated clockwise direction or counterclockwise direction, which is the same as the rotation direction of the first operating portion 81a.
However, the first operating portion 81a is formed with a stopper au for restricting the first pushing portion 81b from rotating in the clockwise direction in the drawing at an intermediate position. The stopper au is formed by partially bending the plate surface portion of the first operation portion 81a in the plate thickness direction, and the rotation of the first operation portion 81a is brought into contact with the edge portion of the first pushing portion 81b. The movement is regulated. The first operation portion 81a is formed with a long hole ah penetrating in the thickness direction, and the end of the inner member 9a of the first cable 9 is hooked in the long hole ah. Here, the end portion of the outer member 9b of the first cable 9 is hooked to a cable hook portion tb formed integrally with the support plate 5t. As a result, the first operation portion 81a is rotated in the counterclockwise direction in the drawing as the inner member 9a is pulled upward in the drawing.

And between this 1st operation part 81a and the 1st pushing part 81b, the winding spring 81d which urges | biases the 1st operation part 81a with respect to the 1st pushing part 81b in the clockwise direction of illustration is shown. It is hung. One end of the winding spring 81d is fitted and hooked on the head of the support shaft 81c integrated with the first operating portion 81a described above, and the other end is formed on the first pushing portion 81b. It is attached to the hanging portion bm. As a result, the first operating portion 81a is held in the rotational position in which the above-described stopper au comes into contact with the first pushing portion 81b as being urged to rotate clockwise in the figure. In this state, the first operating portion 81a is integrated with the first pushing portion 81b in the rotating direction by the urging force of the winding spring 81d.
An engagement pin bp is attached to the lower end portion of the first pushing portion 81b. As shown in FIG. 11, the engaging pin bp is rotated counterclockwise by the first pusher 81b integrally with the first operating portion 81a by the pulling operation of the first cable 9. When this is done, it is provided as a functional component that kicks and moves the head 62c of the holding member 62 of the locking device 60 described above. Here, the spring force of the winding spring 81d provided between the first operating portion 81a and the first pushing portion 81b is the tension spring 63 provided between the hook 61 and the holding member 62 of the locking device 60. It is set stronger than the spring force. Therefore, as described above, the operation of rotating the holding member 62 in the clockwise direction in the figure can be performed while maintaining the integrated state of the first operating portion 81a and the first pushing portion 81b. .

However, as shown in FIG. 12, when the rotation of the holding member 62 to the release position is restricted by the sliding movement of the upper rail 52, the first pushing portion 81 b is illustrated by this turning restriction. The counterclockwise rotation is regulated at a midway position. However, when the pulling operation of the first cable 9 is further advanced in the state where the rotation of the first pushing portion 81b is restricted, the first operating portion 81a is caused by the pulling operation force of the first cable 9 to It is turned counterclockwise in the figure against the spring force of the winding spring 81d.
Therefore, even when the rotation of the first pushing portion 81b is restricted at the midway position as described above, the first operating portion 81a is swung to prevent the first cable 9 from being subjected to an abnormal load. be able to. Note that the operation of the first cable 9 at this time becomes heavy because the spring force of the winding spring 81d acts as a resistance force.

Next, returning to FIG. 10, the second rotating member 82 is divided into a second operating portion 82 a and a second pushing portion 82 b in the same manner as the first rotating member 81 described above. These are pivotally connected to the support plate 5t by a support shaft 82c so as to be rotatable. Here, the 2nd operation part 82a is equivalent to the operation part of this invention, and the 2nd pushing part 82b is equivalent to the pushing part of this invention.
The support shaft 82c is integrally coupled to the second operation portion 82a, and is connected to the second pushing portion 82b so as to be pivotally supported. As a result, the second pushing portion 82b can be freely rotated in the illustrated clockwise or counterclockwise direction, which is the same as the rotation direction of the second operation portion 82a.
However, the second operation portion 82a is formed with a stopper at that restricts the rotation of the second pushing portion 82b in the counterclockwise direction in the figure at an intermediate position. The stopper at is formed by partially bending the second operation portion 82a, and restricts the rotation of the second operation portion 82a by contact with the hooking portion bn of the second pushing portion 82b. It has become.

Here, a connecting link 83 is linked to the second operating portion 82a with the first operating portion 81a. The connecting link 83 is pivotally connected to the first operation portion 81a by a support shaft 83a at the left end portion in the figure, and the right end portion in the drawing is rotated to the second operation portion 82a by a support shaft 83b. It is pivotally connected so that it can move.
As shown in FIG. 11, when the first cable 9 is pulled, the connection link 83 moves the support shaft 83a, which is a connection portion with the first operation portion 81a, to be lifted obliquely upward in the drawing. The support shaft 83b, which is a connection portion with the second operation portion 82a, is also connected to both so as to be transmitted as a movement that is lifted obliquely upward in the drawing. Thereby, the operating force of the 1st cable 9 is efficiently transmitted from the 1st operation part 81a to the 2nd operation part 82a.

And between this 2nd operation part 82a and the 2nd pushing part 82b, the winding spring 82d which urges | biass the 2nd pushing part 82b with respect to the 2nd operation part 82a in the clockwise direction of illustration is shown. It is hung. One end of the winding spring 82d is engaged with and hooked onto the head of the support shaft 82c integrated with the second operation portion 82a described above, and the other end is formed on the second pushing portion 82b. It is attached to the hanging portion bn. As a result, the second pushing portion 82b is rotated and biased in the clockwise direction in the figure with respect to the second operation portion 82a, and is in the rotation position state where the hook portion bn and the stopper at contact with each other. Is retained. In this state, the second pushing portion 82b is integrated with the second operating portion 82a in the rotating direction by the urging force of the winding spring 82d.
Here, a winding spring 84 is hooked between the hooking portion bn of the second pushing portion 82b and the hooking portion te formed on the support plate 5t. The winding spring 84 urges the second pushing portion 82b to rotate in the counterclockwise direction shown in the figure with respect to the support plate 5t. As a result, the entire second rotating member 82 is urged to rotate counterclockwise in the figure, and the entire first rotating member 81 is urged to rotate clockwise in the figure via the connecting link 83. Yes. Then, the rotation of the first rotation member 81 by the urging force is restricted by the first pushing portion 81b coming into contact with a stopper ta formed on the support plate 5t. Thereby, the 1st rotation member 81 and the 2nd rotation member 82 are hold | maintained in the initial rotation position state shown by FIG.
The spring force of the winding spring 84 is set to be weaker than the spring force of the winding spring 81d provided on the first rotating member 81 and the spring force of the winding spring 82d provided on the second rotating member 82. Yes.

  And the engaging pin bq is attached to the lower end part of the 2nd pushing part 82b mentioned above. As shown in FIG. 11, the engaging pin bq is rotated in the clockwise direction in the drawing by the second pushing portion 82b being integrated with the second operating portion 82a by the pulling operation of the first cable 9. In this case, the head 72c of the holding member 72 of the locking device 70 described above is kicked and operated as a functional component for rotating the head 72c. Here, the spring force of the winding spring 82d provided between the second operating portion 82a and the second pushing portion 82b is a tension spring 73 provided between the hook 71 and the holding member 72 of the locking device 70. It is set stronger than the spring force. Therefore, as described above, the operation of rotating the holding member 72 in the clockwise direction in the figure can be performed while maintaining the integral state of the second operation portion 82a and the second pushing portion 82b. .

However, as shown in FIG. 12, when the rotation of the holding member 72 to the release position is restricted by the sliding movement of the upper rail 52, the second pushing portion 82 b is shown by this turning restriction. The clockwise rotation is restricted at a midway position. However, when the pulling operation of the first cable 9 is further performed in the state where the rotation of the second pushing portion 82b is restricted, the second operating portion 82a is caused by the pulling operation force of the first cable 9 to It is rotated in the clockwise direction in the figure against the spring force of the winding spring 82d.
Accordingly, even when the rotation of the second pushing portion 82b is restricted at the midway position as described above, the second operation portion 82a is swung to prevent the first cable 9 from being subjected to an abnormal load. be able to. In addition, in the operation of the first cable 9 at this time, in addition to the spring force of the winding spring 81d described above, the spring force of the winding spring 82d acts as a resistance force, so that the operation becomes heavy.

Next, returning to FIG. 10, the configuration of the slide lock release operation mechanism 90 that performs the lock release operation of the slide lock device 53 described above will be described.
The slide lock release operation mechanism 90 includes a second cable 91, an L-shaped link 92, and a tension spring 93.
Specifically, the second cable 91 has a double structure in which a linear inner member 91a is inserted into a tube of a tubular outer member 91b. The end of the illustrated inner member 91 a is hooked to a cable hook 92 a of an L-shaped link 92 described later, and the end of the outer member 91 b is attached to the support plate 5 t of the support mechanism 5. It is hooked to the integrally formed cable hooking portion tc. The second cable 91 is connected to an operation member (not shown) on the other end side, and the inner member 91a is pulled from the other end side in accordance with the operation of the operation member.
Next, the L-shaped link 92 is pivotally connected to the support plate 5t by a support shaft 92d. In this L-shaped link 92, a cable hooking portion 92a on which the end portion of the inner member 91a described above is hooked is formed at the tip portion on the arm side extending upward in the drawing. A push portion 92c that pushes and operates the receiving portion ax of the operation arm 53a of the slide lock device 53 is formed at the distal end portion of the L-shaped link 92 that extends to the right in the figure. In the L-shaped link 92, a tension spring 93 is hooked between a hook portion 92b formed on the arm portion extending rightward and a hook portion td formed on the support plate 5t. As a result, the L-shaped link 92 is normally urged to rotate counterclockwise in the figure, and the second cable 91 is held in the initial position before the pulling operation.
The L-shaped link 92 is rotated in the clockwise direction in the drawing by the second cable 91 being pulled in accordance with the operation of the operation member (not shown). Thereby, the L-shaped link 92 pushes and moves the receiving portion ax of the operating arm 53a by the pressing portion 92c, and rotates the operating arm 53a in the clockwise direction in the drawing. As a result, as described above with reference to FIG. 13, the lock claw 53c is pushed to the turning position where the locked state is released.

Then, the usage method of a present Example is demonstrated.
That is, referring to FIG. 1, when the seat body 1 is in a normal seating and use state, the seat cushion 3 is engaged and locked at a position where the seat cushion 3 lies down on the floor surface F, and the seat back 2 stands up. It is held at the position in the posture state.
Therefore, in order to switch the seat body 1 in this state to the folded posture state and to raise and store the seat body 1 from the floor surface F, the operation lever L provided on the bottom surface portion 3b of the seat cushion 3 is pulled rearward. Perform the operation.

Specifically, an operation of pulling the operation lever L backward is performed to move the operation lever L from the rotation position shown in FIG. 3 to the rotation position shown in FIG. Thereby, the switching arm 6a is rotated in the clockwise direction in the figure, and the locked state of the reclining devices 6 and 6 is released. Thereby, the fixed state of the backrest angle of the seat back 2 is released, and the seat back 2 is moved forward.
At this time, the operation lever L is regulated at a position where the roller 13 attached to the first bracket 10 abuts against the abutting surface 31 of the regulating member 30, and the rotation operation is regulated. As a result, the operation lever L can be operated only until the fixed state of the backrest angle of the seat back 2 is released by one operation to be pulled backward.

Then, as shown in FIG. 5, when the seat back 2 is tilted forward, the rotation restriction state of the operation lever L by the restriction member 30 is released in conjunction with this movement. Therefore, if the operation of the operation lever L is stopped in this state, the seat body 1 can be kept in a posture state (solid line state in FIG. 1) folded on the floor surface F.
However, when the turning operation of the operating lever L is further advanced from this state and turned to the second turning position shown by the solid line in FIG. 7, the second bracket 20 is turned in the same direction, and the second lever 20 is turned. One cable 9 is pulled.

At this time, when the slide position of the upper rail 52 of the slide rail mechanism 50 is a position where the recesses 52s1, 52s2 and the recesses 51s1, 51s2 coincide with each other as shown in FIG. 11, it is shown in FIG. Thus, with the pulling operation of the first cable 9, the engagement lock state of each lock device 60, 70 is released, and the seat body 1 is raised from the floor surface F in the folded posture state and the vehicle body wall portion B Is stored in a standing posture state at the position.
However, as shown in FIG. 12, when the recesses 52s1, 52s2 and the recesses 51s1, 51s2 are in a position shifted from each other, each locking device 60, The engagement lock state 70 is not released, and the seat body 1 remains in the folded state in the posture of lying down on the floor surface F. Since the operation of the first cable 9 at this time is performed against the urging force of each of the winding springs 81d and 82d provided in the unlocking operation mechanism 80, the operation becomes heavy.

Here, as shown in FIG. 7, in a state where the operation lever L is rotated to the illustrated second rotation position, the operation portion 11 of the first bracket 10 is attached to the swing arm 6b. The engagement pin 6c is overcome in the rotation direction, and the arrangement relationship between the two is reversed. Therefore, if the swing arm 6b (switching arm 6a) or the first bracket 10 is returned to the initial position with this reversed arrangement relationship, a subsequent rotation operation by the operation lever L cannot be performed.
However, in the configuration of the present embodiment, the swinging arm 6b is configured so that the reversed arrangement relationship of the two is returned to the original state as the operation lever L is returned to the original initial position. Yes. That is, as shown in the figure, when the operation lever L stops its operation and rotates in the clockwise direction, the engagement pin 6c attached to the swing arm 6b is connected to the operation portion 11 of the first bracket 10. It is pushed. At this time, the switching arm 6a is held in its rotational position by the holding force of each of the reclining devices 6 and 6 in the free zone state. Therefore, only the swing arm 6b rotates in the counterclockwise direction around the connecting shaft 6p with the switching arm 6a to swing, and the operating lever L gets over the engagement pin 6c and returns to the initial position. As a result, the original state before the arrangement relationship between the two is reversed is restored.

Thus, in the vehicle seat unlocking operation mechanism of the present embodiment, as shown in FIG. 12, when the seating position in the front-rear direction of the seat body 1 deviates from the specific position where the unlocking operation can be performed (recess 52s1). , 52s2 and the recesses 51s1, 51s2), the lever operation of the operation lever L is heavier than the operation force during the normal release operation, so that the lever It can be made easy to feel that the operation cannot be canceled by the operation.
Further, as a configuration for locking the seat body 1 to the floor surface F, strikers 5s and 5s having a relatively simple configuration are arranged on the seat body 1 side, and the lock devices 60 and 70 having a large configuration are arranged. By disposing on the slide rail mechanism 50 side, it is possible to simplify the components on the seat body 1 side that are used after being disengaged from the floor surface F.
Furthermore, since the lever operation of the operation lever L is configured to be performed manually, the operator can directly feel the feeling that the lever operation becomes heavy.

Although the embodiment of the present invention has been described with respect to one example, the present invention can be implemented in various forms in addition to the above-described example.
For example, an engagement lock structure comprising a striker as an engagement / disengagement mechanism and a lock device is shown at two positions in the front and rear between the seat body and the slide rail mechanism. You may arrange | position in the above position.
Moreover, although the connection link was shown as a power transmission member which interlock | cooperates the rotational movement of a 1st rotation member and a 2nd rotation member, it is also possible to use other transmission members, such as a cable.
In addition, as a configuration for making the lock device unreleasable when the seat body is out of a specific seating position, the position of the recess that can accept the release operation of the lock device formed on the lower rail is set to the slide of the upper rail. The structure which moved apart to the position where acceptance becomes impossible with a movement was shown. However, for example, when the locking device is provided on the seat body side and the striker is provided on the upper rail side, the unlocking operation of the locking device is allowed in accordance with the change in the slide position of the upper rail. It is necessary to provide some mechanism for switching between the state and the restricted state.

1 is a perspective view illustrating a schematic configuration of a vehicle seat according to Embodiment 1. FIG. It is a side view showing the whole structure of the unlocking operation mechanism of the vehicle seat. It is a block diagram showing the initial position state before rotation operation of an operation lever. It is an operation | movement figure showing the state in which rotation operation of the operation lever was controlled. It is an operation | movement figure showing the state by which the seat back was moved forward and the rotation control state of the operation lever was cancelled | released. It is an operation | movement figure showing the state which operated the operation lever to the 2nd rotation position. FIG. 7 is an operation diagram illustrating the movement of the swing arm when the operation of the operation lever is stopped from the state of FIG. 6. It is a disassembled perspective view showing the lever structure of an operation lever. It is a disassembled perspective view of a slide rail mechanism. It is a block diagram showing the engagement lock state of the locking device. FIG. 10 is an operation diagram illustrating a state in which the engagement lock of the lock device is released by pulling the first cable from the state of FIG. 9. It is an operation | movement figure showing the state by which the engagement lock | rock of a locking device is not cancelled | released even if a 1st cable is pulled. FIG. 10 is a cross-sectional view taken along the line XIII-XIII of FIG. 9 showing the cross-sectional shape of the slide rail mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat main body 2 Seat back 2f Back frame 2b Pushing member 3 Seat cushion 3f Cushion frame 3b Bottom surface part 3d Storage recessed part 4 Hinge mechanism 4s Winding spring 5 Support mechanism 5t Support plate ta Stopper tb Cable hook part tc Cable hook part td Hook part te hanging part 5s striker 6 reclining device 6r switching shaft 6a switching arm as stopper 6t fixing ring 6p connecting shaft 6u winding spring 6b swinging arm bs stopper 6c engaging pin 6e roller 6f fixing ring 7 base plate 7s elongation stopper 7h long hole 7w Cable hook portion 7c Hook portion 7b Bolt 8 Support shaft 8b Winding spring 9 First cable 9a Inner member 9b Outer member 10 First bracket 11 Operation portion 12 Engaging pin 13 Roller 14 Fixing ring 20 Second bracket 2 DESCRIPTION OF SYMBOLS 1 Cable hook part 22 Engagement piece 30 Restriction member 31 Abutting surface 32 Spindle 33 Winding spring 34 Stopper 40 Release member 41 Pressure receiving part 42 Connection pin 43 Slide pin 50 Slide rail mechanism 51 Lower rail 51u Lower surface part 51x1 Right side part 51x2 Right return surface part (Regulatory member)
51y1 Left side surface portion 51y2 Left return surface portion 51h Through hole 51s1, 51s2 Recessed portion 52 Upper rail 52a1 Right side surface portion 52a2 Right fin surface portion 52b1 Left side surface portion 52b2 Left fin surface portion 52h Through hole 52s1, 52s2 Recessed portion 53 a Operation arm ax 53b Support shaft 53c Lock claw ct Projection plate 53d Support shaft 60, 70 Lock device 61, 71 Hook 61a, 71a Support shaft 61b, 71b Locking convex portion 61c, 71c Head portion 61d, 71d Receiving portion 61e, 71e Holding portion 62, 72 Holding member 62a, 72a Support shaft 62b, 72b Locking recess 62c, 72c Head 62d, 72d Leg 63, 73 Tension spring 80 Unlocking operation mechanism 81 First rotating member (rotating member)
81a 1st operation part (operation part)
ah long hole au stopper 81b first pushing portion (pushing portion)
bp engaging pin bm hanging portion 81c support shaft 81d winding spring 82 second rotating member (rotating member)
82a Second operation unit (operation unit)
at Stopper 82b Second push part (push part)
bq engagement pin bn hanging portion 82c spindle 82d winding spring 83 connecting link 83a supporting shaft 83b spindle 84 winding spring 90 slide lock release operation mechanism 91 second cable 91a inner member 91b outer member 92 L-shaped link 92a cable hanging portion 92b Hanging part 92c Pushing part 92d Support shaft 93 Tension spring L Operation lever B Vehicle body wall part F Floor surface

Claims (3)

An unlocking mechanism for a vehicle seat capable of releasing an engagement lock state between a seat body and a floor surface serving as a seating portion,
A slide rail mechanism is provided between the seat body and the floor surface so that the seat body can be slidably moved in the horizontal direction with respect to the floor surface and the seating position of the seat body can be adjusted. Has been
Between the slide rail mechanism and the seat body, an engagement / disengagement mechanism capable of engaging and disengaging both is disposed.
The engagement / disengagement mechanism is operated in the release direction by being pushed by a rotating member that rotates in conjunction with the lever operation by performing a lever operation for releasing the engagement lock. And
The rotating member is connected to an operating portion that rotates in response to the operating force of the lever operation and an oscillating motion of an elastic member that is provided between the operating portion and the operating portion so as to be swingable. The swinging motion is restricted by force, and has a pushing portion that integrally pushes the engagement / disengagement mechanism in the releasing operation direction, and the rotating member is formed by the seat body. When the slide rail mechanism is in a specific seating position, the operation portion and the push portion can be integrated with each other to release the engagement lock state of the engagement / disengagement mechanism in conjunction with the lever operation. However, when the seat body is in a state of being deviated from a specific seating position, the rotating member is a restriction member provided in relation to the components of the slide rail mechanism. To the release operation position of the pusher Rotation is restricted, and in a state where the pushing portion is turned, the operation portion is against the pushing portion against the elastic force of the elastic member as the lever operation proceeds. A vehicular seat unlocking operation mechanism, wherein the forcible operation force from the lever operation is elastically relieved by bending relative rotation. The vehicle seat unlocking operation mechanism according to claim 1,
The engagement / disengagement mechanism is
A striker having a frame structure provided in the seat body;
A locking device provided with a hook provided on the slide rail mechanism and detachable from the striker;
The rotating member is provided in the seat body, and is engaged by pushing a holding member for holding an engagement lock state of a lock device provided in the slide rail mechanism in accordance with the rotating motion. A vehicle seat unlocking operation mechanism characterized by being configured to unlock. The vehicle seat unlocking operation mechanism according to claim 1 or 2,
The vehicle seat unlocking operation mechanism is characterized in that the lever operation for releasing the engagement lock state of the engagement / disengagement mechanism is performed by an operation force by manual operation.

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