JP4970142B2 - 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 technique has been known in which a seat back that is a backrest is brought forward and 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, the seat body is hinged to the floor surface so as to be pivotable up and down, and the seat body is normally engaged and locked in a posture state where the seat body lies on the floor surface. Then, by operating the lever for retracting the seat body, the seat back is brought forward and the engagement lock state with the floor surface is released, and the seat body is raised toward the vehicle body wall. It has become.

JP 2006-298183 A

  However, in the prior art disclosed above, the operation for retracting the seat back and the operation for releasing the engagement lock state with the floor surface are continuously performed by operating the lever for the storing operation. The structure is such that the operation cannot be stopped in the middle. Accordingly, for example, the seat main body cannot be used as a table on the floor surface by keeping the seat back in a forward-facing posture.

  The present invention has been devised as a solution to the above-described problems, and the problem to be solved by the present invention is to release the engagement lock state with the floor surface by folding the seat body. The operation lever structure that can be used is to allow the user to selectively use the seat main body in the folded posture state on the floor surface and further releasing the engagement lock state with the floor surface.

In order to solve the above problems, the vehicle seat unlocking operation mechanism of the present invention takes the following means.
First, the first invention is a vehicle seat unlocking operation mechanism capable of releasing the engagement lock state between the seat body and the floor surface by folding the seat back forward to bring the seat body into a folded posture. It is. The vehicle seat unlocking operation mechanism is integrated with the first operation member by engaging the first operation member with the first operation member that can be rotated on the seat body. A second operating member that is rotated. The first operating member is configured to rotate the seat back to the first rotational position, thereby releasing the fixed state of the backrest angle of the seat back so that the seat back can be tilted forward. The second operating member is engaged with the first operating member by rotating the first operating member to the second rotating position that is further rotated than the first rotating position. Then, it rotates integrally, and the engagement lock state between the seat body and the floor surface is released by this rotation. The seat body is provided with a regulating structure capable of regulating the turning operation of the first operating member. In this restricting structure, the rotation of the first operating member can reach the first rotation position but always reaches the second rotation position before the seat back is brought forward. It is restricted to an impossible state. This restricting structure is configured to release the rotation restricting state of the first operating member by the movement in which the seat back is brought forward.
According to the first aspect of the invention, the fixed state of the backrest angle of the seat back is released by rotating the first operating member to the first rotating position. As a result, the seat back can be brought forward. Then, by further rotating the first operating member to the second rotating position, the second operating member is engaged with the first operating member and integrally rotated. As a result, the engagement lock state between the seat body and the floor surface is released. The first operation member is regulated by the regulation structure so that the rotation operation to the second rotation position cannot be performed at all times before the seat back is brought forward. Therefore, the first operation member can perform an operation until the fixed state of the backrest angle of the seat back is released by the single operation due to this restriction. And the 1st operation member will be in the state which can perform rotation operation to a 2nd rotation position, when a seat back is moved forward and the restriction state of the rotation operation is released. Therefore, if the rotation operation of the first operation member is stopped in this state, the seat body is kept in a state where the seat body is switched to the folding posture on the floor surface. Further, when the first operation member is rotated to the second rotation position, the engagement lock state with the floor surface is released while the seat body is in the folded posture.

Next, according to a second aspect, in the first aspect described above, the restriction structure for restricting the rotation operation of the first operation member is the first of the restriction members pivotally connected to the seat body. When the operating member is abutted by the rotating operation, the rotating operation of the first operating member is restricted. The restricting structure is a structure that releases the rotation restricting state of the first operating member when the restricting member is turned by the forward movement of the seat back and removed from the abutting state with the first operating member. It has become. The abutting surface that is abutted against the first operating member of the restricting member is formed in a curved surface shape, and is easily detached from the abutting state with the first operating member by a turning operation.
According to the second aspect of the invention, the restricting member is formed in a curved surface with the abutting surface being abutted against the first operating member, so that when the seat back is tilted forward, It is smoothly removed from the butted state.

Next, according to a third aspect, in the second aspect described above, when the seat back is tilted forward in the restriction structure, the operation of rotating the restriction member in a direction to remove from the abutting state with the first operation member is performed. The release member connected to the restricting member is pushed by the forward movement of the seat back to rotate the restricting member.
According to the third aspect, when the seat back is tilted forward, the release member is pushed by this movement. As a result, the regulating member is rotated by the release member and removed from the abutting state with the first operating member.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first aspect of the present invention, the restriction structure can restrict the operation so that the first operation member can only perform the operation until the fixed state of the backrest angle of the seat back is released by the single operation. By providing the seat back, it is possible to prevent the engagement lock state between the seat main body and the floor surface from being released unless the seat back is moved forward and the first operation member is further rotated from there. Therefore, the operation lever structure which can release the engagement lock state with the floor surface by setting the seat body to the folded position can be kept in the folded position state on the floor surface, and further from there to the floor surface. It is possible to perform an appropriate operation for releasing the engagement lock state.
Furthermore, according to the second invention, the contact surface of the restricting member with the first operating member is formed into a curved surface so that it can be easily removed from the abutting state. The rotation restriction state of the operating member can be smoothly released.
Further, according to the third invention, the release member is pushed by the forward movement of the seat back to remove the restricting member from the abutting state with the first operation member. A configuration for releasing the rotation restriction state can be realized by a simple configuration.

  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 vehicle seat unlocking operation mechanism 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.
By the way, the reclining devices 6 and 6 described above are normally energized in the operation direction in which they are locked, and are automatically returned to the locked state when the operation lever L is stopped. It has become. 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. Specifically, the seat body 1 is lifted up so as to avoid the tire house Bt so as not to interfere with the tire house Bt provided so as to protrude from the vehicle body wall portion B. 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.
Hereinafter, the structure of the seat body 1 and the lever structure of the operation lever L will be described in detail.

That is, the seat body 1 is supported so as to be able to turn up and down with respect to the floor surface F by the hinge mechanism 4 that hinges the side portion on the right side of the seat cushion 3 and the vehicle body wall B. The hinge mechanism 4 is assembled with a spring member (not shown) that urges the seat body 1 in the direction to raise the seat body 1 from the floor surface F.
Therefore, the seat body 1 is lifted from the floor surface F by the biasing force of the spring member described above when the engagement lock state with the floor surface F by the support mechanism 5 described later is released, and the vehicle body wall portion B Is held in a standing posture at the position.
The seat body 1 is supported with respect to the floor surface F by a support mechanism 5 provided so as to be housed and deployable on the bottom surface portion 3b of the seat cushion 3 when lying down on the floor surface F.

  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, hooks 5f and 5f that can engage with strikers Fs and Fs installed on the floor surface F are disposed at front and rear ends of the support plate 5t, respectively. The hooks 5f and 5f are brought into contact with the strikers Fs and Fs by the movement of dropping the seat body 1 onto the floor surface F, and are pushed further in the direction of engaging with the strikers Fs and Fs to be locked in that state. It has become. Therefore, the seat body 1 is held in a locked state so as not to be raised from the floor surface F by the hooks 5f and 5f.
The hooked state of the hooks 5f, 5f with the strikers Fs, Fs is released by pulling the operation lever L provided on the seat body 1 to the rear side. As a result, the seat body 1 is raised from the floor surface F by the urging force of the spring member 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 operating lever L is shown by a view as seen from the section taken along the line II-II in FIG. FIG. 7 shows the lever structure described above in an exploded perspective view.
As shown in FIG. 7, 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. 2 are locked by the biasing force of a spring member (not shown) that is normally assembled to the reclining devices 6 and 6. Is held in. As shown in FIG. 3, the switching arm 6a is rotated counterclockwise by rotating the operation lever L as shown in FIG. 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. 5, 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. 2, 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 figure at a certain point. As shown in FIG. 7, the stopper bs is formed by partially bending the plate surface portion of the swing arm 6b in the 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. 2, 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. 7, the engaging pin 6c is inserted and attached to the swing arm 6b in the plate thickness direction, and the cylindrical roller 6e is inserted at the inserted end and the fixing ring 6f is inserted. 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. 7, 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. 4, 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. 7, 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.
A cable hook portion 7w for hooking an end portion of an outer member 9b of an operation cable 9 described later is formed at the lower left end portion of the base plate 7 in the figure. 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. 2, a winding spring 8 b that urges the first bracket 10 to rotate in the clockwise direction is hooked between the first bracket 10 and the base plate 7. 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.
Here, the first bracket 10 corresponds to the first operating member of the present invention.

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. 3, when the operating lever L is rotated counterclockwise as shown in FIG. 3, the operating portion 11 presses the roller 6e to integrally move 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. 7, 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. 3, 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.

By the way, the regulating member 30 constituting the regulating structure that regulates the turning operation of the operating lever L is formed by 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. 2, a winding spring 33 is hooked 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 in the long hole 7h as the restricting member 30 rotates.
As shown in FIG. 2, the release member 40 is configured to cause the slide pin 43 to reach the upper end of the long hole 7h by receiving a movement in which the restricting member 30 is normally urged to rotate clockwise in the figure. 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. 4, 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 downward in the figure. 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, referring back to FIG. 7, the second bracket 20 made of an arm-shaped 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 hooking portion 21 for hooking the end portion of the inner member 9a of the operation 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.
Here, the second bracket 20 corresponds to a second operation member of the present invention.

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. 3, 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. 5, 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. Thereby, the 2nd bracket 20 pulls the edge part of the inner member 9a hung on the lower end part, and operates the operation cable 9 with the appearance which pulls this out from the edge part of the outer member 9b. .

Here, returning to FIG. 7, the operation 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 ends of the inner member 9a and the outer member 9b are hooked to operating parts for releasing the engagement lock state of the hooks 5f and 5f of the support mechanism 5 described above with reference to FIG.
Thereby, the operation cable 9 performs an operation of releasing the engagement lock state of the hooks 5f and 5f of the support mechanism 5 by performing a pulling operation in which the inner member 9a is pulled out from the outer member 9b on one end side thereof. It is like that. Specifically, the operation cable 9 is pulled by the second bracket 20 when the operation lever L is rotated to the second rotation position indicated by the solid line in FIG. Thus, the engagement lock state of each hook 5f, 5f is released.
As shown in FIG. 2, the second bracket 20 hooked to one end of the inner member 9a is in a predetermined initial position state on the other end side in the initial state before the second bracket 20 is operated. Under the action of the holding force being held, it is held in the rotational position shown in FIG.

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, the operation lever L is pulled backward to move the operation lever L from the rotation position shown in FIG. 2 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. Specifically, the reclining devices 6 and 6 are unlocked when the operation lever L is turned to the first turning position indicated by the phantom line in FIG. 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 configured such that the rotation of the operation lever L is restricted at a position where the roller 13 attached to the first bracket 10 contacts the abutment surface 31 of the restriction member 30. 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. 4, 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 (virtual line state in FIG. 1) folded on the floor surface F.
However, if the turning operation of the operating lever L is further advanced from this state to the second turning position shown by the solid line in FIG. 5, the second bracket 20 is turned in the same direction and operated. The cable 9 is pulled. As a result, as shown in FIG. 1, the engagement lock state of the hooks 5 f and 5 f with the strikers Fs and Fs is released, and the seat body 1 is raised from the floor surface F in the folded posture, and the vehicle body wall The standing posture state is stored at the position of part B.

At this time, as shown in FIG. 5, 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 returns the above-described reversed arrangement relationship of the both to the original state as the operation lever L is returned to the original initial position. ing. That is, as shown in FIG. 6, 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.

As described above, in the vehicle seat unlocking operation mechanism of the present embodiment, the operation lever L that is rotated together with the first bracket 10 changes the fixed state of the backrest angle of the seat back 2 by the single rotation operation. A restricting structure capable of restricting the operation of the operation lever L is provided so that only the operation until the release is performed. Thus, the engagement lock state between the seat body 1 and the floor surface F is not released unless the seat back 2 is moved forward and the operation lever L (first bracket 10) is further rotated from there. Can be. Accordingly, by operating the single control lever L, the seat body 1 can be used in a folded manner on the floor surface F, and further, the engagement lock state with the floor surface F can be released from there. Can be.
Further, the contact surface 31 of the regulating member 30 with the first bracket 10 (roller 13) is formed in a curved surface so that it can be easily removed from the abutting state, so that when the seat back 2 is tilted forward, The rotation restricted state can be released smoothly.

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, as a configuration for restricting the rotation operation of the operation lever, a configuration in which the operation lever is abutted against a restriction member that is pivotally supported is provided. It is not limited, and various other operation structures such as a type that moves in and out and a type that slides can be applied.
In addition, the release member that rotates the restriction member by being pushed by the forward movement of the seat back is shown as a configuration that detects the movement of the seat back forward and removes the restriction member from the restriction state. It is also possible to employ other detection structures such as a wire structure that removes the regulating member from the regulated state by pulling operation in conjunction with the movement.

1 is a perspective view illustrating a schematic configuration of a vehicle seat according to Embodiment 1. FIG. It is the II-II sectional view taken on the line of FIG. 1 showing the lever structure of the 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. 6 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. 5. It is a disassembled perspective view showing the lever structure of an operation lever.

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 5 Support mechanism 5t Support plate 5f Hook 6 Reclining device 6r Switching shaft 6a Switching arm as stopper 6t Fixing ring 6p connecting shaft 6u winding spring 6b swing arm bs stopper 6c engagement pin 6e roller 6f fixing ring 7 base plate 7s forward tilt stopper 7h long hole 7w cable hook 7c hook 7b bolt 8 spindle 8b winding spring 9 operation cable 9a Inner member 9b Outer member 10 First bracket (first operation member)
DESCRIPTION OF SYMBOLS 11 Operation part 12 Engagement pin 13 Roller 14 Fixing ring 20 2nd bracket (2nd operation member)
DESCRIPTION OF SYMBOLS 21 Cable hook part 22 Engagement piece 30 Restriction member 31 Abutting surface 32 Support shaft 33 Winding spring 34 Stopper 40 Release member 41 Pressure receiving part 42 Connection pin 43 Slide pin L Operation lever B Car body wall part Bt Tire house F Floor surface Fs Strikeer

Claims (3)

A seat unlocking operation mechanism for a vehicle seat capable of releasing the engagement lock state between the seat body and the floor surface, with the seat back folded forward and the seat body folded.
A first operating member provided on the seat body so as to be rotatable;
A second operating member that is rotated integrally with the first operating member by engagement with the first operating member;
The first operation member is configured to be able to move the seat back forward by releasing the fixed state of the backrest angle of the seat back by rotating the first operation member to the first rotation position.
The second operation member rotates the first operation member to a second rotation position where the rotation is further advanced than the first rotation position. Is engaged and rotated integrally, and by this rotation, the engagement lock state between the seat body and the floor surface is released,
The seat body is provided with a restriction structure capable of restricting the rotation operation of the first operation member, and the restriction structure is always set to the first operation before the seat back is brought forward. The movement of the member is restricted to a state in which the rotation of the member can reach the first rotation position but cannot reach the second rotation position, and the seat back is moved forward. An unlocking mechanism for a vehicle seat, wherein the rotation restricting state of the first operating member by the restricting structure is released. The vehicle seat unlocking operation mechanism according to claim 1,
The restriction structure for restricting the rotation operation of the first operation member is configured such that the first operation member is abutted by a rotation operation against a restriction member pivotally connected to the seat body. The first operation member is restricted from rotating, and the restriction member is turned by moving the seat back forward so that the first operation member is removed from the abutting state with the first operation member. It is structured to release the rotation restriction state of the member,
The abutment surface of the restriction member that is abutted against the first operation member is formed in a curved surface shape, and is easily removed from the abutment state with the first operation member by a turning operation. Seat unlocking mechanism. The vehicle seat unlocking operation mechanism according to claim 2,
In the regulation structure, when the seat back is tilted forward, an operation of rotating the regulation member in a direction to remove it from the abutting state with the first operation member is performed by a release member connected to the regulation member. An unlocking mechanism for a vehicle seat, which is performed by an operation of rotating the regulating member by being pushed by a forward-backward movement of the back.

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