JP5796044B2 - Dive down seat - Google Patents

Description

  The present invention relates to a vehicular seat, and more particularly to a dive-down seat that moves a seat cushion forward in conjunction with a forward tilt of a seat back and uses the back of the forward-backed seat back as a loading surface of a luggage compartment.

  Conventionally, as a technology in such a field, there is JP-A-2005-067325. The dive down seat described in this publication includes a first hinge portion that pivotably connects a lower end of a seat back frame of a seat back to an upper rail of a slide rail, and a rear end of the seat cushion frame of the seat cushion. A second hinge part for pivotally connecting the front leg to the seat back frame, a third hinge part for pivotally connecting the upper end of the front leg to the seat cushion frame, and a lower end of the front leg to the vehicle floor And a fourth hinge part for pivotally connecting the two. With such a configuration, the seat cushion can be moved forward in conjunction with the forward tilting of the seat back, and the rear surface of the forward tilted seat back can be used as the loading surface of the luggage compartment.

Japanese Patent Laid-Open No. 2005-067325

  However, in the above-described conventional dive down seat, the fourth hinge portion is fixed to the vehicle floor. Therefore, considering the load received by the front leg, the front leg and the seat back frame are rotatably connected. The degree of freedom in setting the position of the hinge part 3 is small. In addition, when the upper rail is fixed to the under rail of the slide rail, there is a problem that the seat back can be moved forward only to a predetermined position.

  An object of the present invention is to provide a dive down seat that increases the degree of freedom of setting a front leg with respect to a seat cushion frame.

The first aspect of the present invention is a dive down seat comprising a seat cushion that is movable back and forth along a slide rail, and a seat back that can be moved forward and backward with respect to the seat cushion.
A first hinge portion rotatably connecting a lower end of a seat back frame of the seat back to an upper rail of the slide rail;
A second hinge portion that pivotably connects a rear end of the seat cushion frame of the seat cushion to the seat back frame;
A third hinge for pivotally connecting the upper end of the front leg to the seat cushion frame;
A locking device fixed on the upper rail side, wherein the lower end of the front leg is detachable from an upper insertion / removal opening, and the lower leg of the front leg is rotatably accommodated.
A guide portion is provided for guiding the lower end of the front leg until it reaches the vehicle floor when the lower end of the lock device is removed from the insertion / extraction port, and the upper end portion of the guide portion is disposed forward of the insertion / extraction port, and It is characterized by extending from the upper end portion toward the front obliquely downward.

  In this dive down seat, in the state where the lower end of the front leg is housed in the lock device, a link mechanism is configured by cooperation with the first to third hinge portions, and thereby, in conjunction with the forward tilt of the seat back. The seat cushion can be moved forward. That is, the seat back can be tilted to a predetermined angle while the seat cushion is advanced to a position where the link relationship is established. When the seat back is further tilted, the link relationship is broken, and the lower end of the front leg is removed from the insertion / removal port of the locking device as the seat cushion moves forward. As a result, the restriction on the forward movement of the seat cushion and the forward tilting of the seat back is released, the seat back can be completely tilted, and the back surface of the seat back is used as the loading surface of the luggage compartment. In such a configuration, it is possible to increase the degree of freedom in setting the front legs with respect to the seat cushion frame in consideration of the load that the front legs receive according to the shape and size of the dive down seat. That is, it becomes possible to increase the degree of freedom in designing the front legs and the seat cushion frame. In addition, the lower end of the front leg is removed from the insertion / removal port of the locking device and is rotated while being guided by the guide part and sliding on the guide part, but the front leg is in contact with the guide part until the front end part of the seat cushion is landed. Therefore, the rotation posture of the front leg can be controlled. Therefore, the front legs suddenly become free, and it is possible to prevent damage to the front legs and the occurrence of collision noise due to collision with the vehicle floor from a position where the lower end of the front legs is high. The guide portion can also function as a guide for the front leg until the lower end of the front leg is attached to the lock device. Until the front end of the seat cushion has landed, the front leg can be in contact with the guide portion to control the pivoting posture of the front leg, so that the seat cushion can be prevented from suddenly falling. In addition, since the locking device is fixed on the upper rail side, the seat back can be completely tilted down without the third hinge portion moving in the front-rear direction. Enables the use of slide rails with

The second aspect of the present invention is a dive down seat provided with a seat back that can be moved forward with respect to the seat cushion.
A first hinge portion that rotatably connects a lower end of a seat back frame of the seat back to a vehicle floor;
A second hinge portion that pivotably connects a rear end of the seat cushion frame of the seat cushion to the seat back frame;
A third hinge for pivotally connecting the upper end of the front leg to the seat cushion frame;
A locking device fixed on the vehicle floor side, wherein the lower end of the front leg is detachable from an upper insertion / removal port, and the lower end of the front leg is rotatably accommodated;
A guide portion is provided for guiding the lower end of the front leg until it reaches the vehicle floor when the lower end of the lock device is removed from the insertion / extraction port, and the upper end portion of the guide portion is disposed forward of the insertion / extraction port, and It is characterized by extending from the upper end portion toward the front obliquely downward.

  In this dive down seat, in the state where the lower end of the front leg is housed in the lock device, a link mechanism is configured by cooperation with the first to third hinge portions, and thereby, in conjunction with the forward tilt of the seat back. The seat cushion can be moved forward. That is, the seat back can be tilted to a predetermined angle while the seat cushion is advanced to a position where the link relationship is established. When the seat back is further tilted, the link relationship is broken, and the lower end of the front leg is removed from the insertion / removal port of the locking device as the seat cushion moves forward. As a result, the restriction on the forward movement of the seat cushion and the forward tilting of the seat back is released, the seat back can be completely tilted, and the back surface of the seat back is used as the loading surface of the luggage compartment. In such a configuration, it is possible to increase the degree of freedom in setting the front legs with respect to the seat cushion frame in consideration of the load that the front legs receive according to the shape and size of the dive down seat. That is, it becomes possible to increase the degree of freedom in designing the front legs and the seat cushion frame. In addition, the lower end of the front leg is removed from the insertion / removal port of the locking device and is rotated while being guided by the guide part and sliding on the guide part, but the front leg is in contact with the guide part until the front end part of the seat cushion is landed. Therefore, the rotation posture of the front leg can be controlled. Therefore, the front legs suddenly become free, and it is possible to prevent damage to the front legs and the occurrence of collision noise due to collision with the vehicle floor from a position where the lower end of the front legs is high. The guide portion can also function as a guide for the front leg until the lower end of the front leg is attached to the lock device. Until the front end of the seat cushion has landed, the front leg can be in contact with the guide portion to control the pivoting posture of the front leg, so that the seat cushion can be prevented from suddenly falling.

The guide portion is provided on an under cover disposed between the seat cushion and the slide rail.
The under cover provided with the guide portion can also be used as a blindfold for closing the gap between the seat cushion and the slide rail.

  According to the present invention, the degree of freedom of setting the front leg with respect to the seat cushion frame can be increased, and the front leg can be in contact with the guide portion until the front end of the seat cushion is landed to control the rotation posture of the front leg. Can be prevented from falling suddenly.

It is a perspective view showing one embodiment of a dive down sheet concerning the present invention. It is a perspective view which shows the frame structure of a dive down seat. It is a front view which shows the frame structure of a dive down seat. It is a principal part expanded sectional view of a dive down sheet. It is sectional drawing which shows a motion of a front leg. It is a side view of the dive down seat in which the seat back is in an inverted state. It is a side view of the dive down seat in which the seat back is in a forward-turned state. It is a side view of the dive down seat in the state where the seat back is completely collapsed.

  Hereinafter, a preferred embodiment of a dive down sheet according to the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 3, the dive down seat 1 includes a slide rail 2 fixed to the vehicle floor, a seat cushion SC movable in the front-rear direction along the slide rail 2, and the seat cushion SC. A seat back SB that can be moved forward is provided, and a reclining unit 3 that freely tilts the seat back SB. The slide rail 2 includes an under rail 2a fixed to the vehicle floor and an upper rail 2b that is movable in the front-rear direction with respect to the under rail 2a. Needless to say, the slide rail 2 is provided with a locking mechanism that locks the movement of the upper rail 2b in the front-rear direction that is movable in the front-rear direction with respect to the under rail 2a.

  A seat cushion frame 6 is disposed in the seat cushion SC, and a seat back frame 7 is disposed in the seat back SB. The lower end of the seat back frame 7 is rotatably connected to the upper rail 2b of the slide rail 2 by the first hinge part 11, and the rear end of the seat cushion frame 6 is seat backed by the second hinge part 12. The frame 7 is rotatably connected. A front leg 10 for receiving a downward load applied to the seat cushion SC when seated is provided on the lower surface side of the seat cushion SC, and the upper end of the front leg 10 is connected to the seat cushion frame 6 by the third hinge portion 13. And are pivotally connected.

  The front leg 10 is made of a pipe material bent into a substantially trapezoidal shape, and is formed by left and right hanging parts 10a and 10b and a locked part 10c extending horizontally between the lower ends of the left and right hanging parts 10a and 10b. Has been. This locked portion 10c forms the lower end of the front leg.

  The bases 14a and 14b are attached to the left and right pipe portions 6a and 6b of the seat cushion frame 6 by welding, and the upper ends of the left and right hanging parts 10a and 10b of the front leg 10 are thirdly attached to the bases 14a and 14b. The hinge portion 13 is pivotally supported by the hinge portion 13. Therefore, the front leg 10 hangs down from the seat cushion frame 6 and can freely rotate about the third hinge portion 13.

  On the upper rail 2b, a load support member 16 capable of supporting the locked portion 10c of the front leg 10 extends forward. The load support member 16 is made of a substantially U-shaped pipe material, and both left and right ends thereof are fixed to the left and right upper rails 2b by welding. The load supporting member 16 has a locking device 20 fixed to the center 16a of the extending pipe member via a bracket 20a that can rotatably accommodate the locked portion 10c of the front leg 10.

As shown in FIG. 4, the locking device 20 has a substantially U-shaped receiving portion 21 that holds the locked portion 10 c that forms the lower end of the front leg 10 in a rotatable manner, and the locked portion 10 c can be easily detached. The upper constriction part 22a and the lower constriction part 22b for preventing it from falling, and the upper receiving piece 24a and the lower receiving piece 24b, which serve as a guide when the locked part 10c is inserted, are provided. The locking device 20 is formed by bending a plate-like metal, and when the operator performs a dive down or tip up operation, the locked portion 10c is inserted through the insertion port 23 to be inserted or pulled out. Has as much elasticity as possible.
In a state where the locked portion 10c is locked to the locking device 20, the pipe-like locked portion 10c is rotatably supported in the receiving portion 21, and both constitute a fourth link. .

  As shown in FIGS. 1 and 7, an under cover 30 is provided between the seat cushion SC and the slide rail 2. The under cover 30 is provided with a guide portion 31 that guides when the locked portion 10 c of the front leg 10 is removed from the insertion / extraction port 23 of the locking device 20. The front sagging guide portion 31 has an upper end portion disposed in front of the insertion / removal port 23 and extends obliquely downward and forward from the upper end portion. The under cover 30 can also be used as a blindfold for closing a gap between the seat cushion SC and the slide rail 2.

  This dive down seat has a link mechanism in cooperation with the first to third hinge portions 11 to 13 in a state where the locked portion 10c forming the lower end of the front leg 10 is accommodated in the receiving portion 21 of the locking device 20. Thus, the seat cushion SC can be moved forward in conjunction with the forward tilt of the seat back SB (see FIGS. 5 and 6). That is, the seat back SB can be tilted to a predetermined angle while the seat cushion SC is advanced to a position where the link relationship is established.

Further, when the seat back SB is further tilted, the sum of the length between the second hinge 12 and the third hinge 13 and the length of the third hinge 13 and the lock device 20 that houses the locked portion 10c of the front leg 10 is obtained. Is set larger than the sum of the length of the locking device 20 that houses the locked portion 10c of the first hinge 11 and the front leg 10 and the length between the first hinge 11 and the second hinge 12. By tilting the seat back SB, the link relationship is broken, and the locked portion 10c of the front leg 10 is disengaged upward (in the direction of arrow B) from the insertion / removal port 23 of the locking device 20, and thereafter the support that is the front end portion of the seat cushion SC. Since the locked portion 10c of the front leg 10 is in contact with the end portion 31a of the guide portion 31 until the leg 25 is landed on the vehicle floor, the rotational posture of the front leg 10 can be controlled. Therefore, the front leg 10 suddenly becomes free, and it is possible to prevent the front leg 10 from being damaged and causing a collision sound due to the front leg 10 colliding with the vehicle floor from a high position. Since the front leg 10 is in contact with the guide portion 31 and can control the rotational posture of the front leg 10 until the support leg 25 which is the front end portion of the seat cushion SC is landed, a sudden drop of the seat cushion SC can be prevented. As shown in FIGS. 5 and 7, the second hinge portion 12 is configured such that the locked portion 10 c of the front leg 10 is detached from the insertion / extraction opening 23 of the locking device 20 when the seat back frame 7 is tilted to a predetermined angle, and the When the front end 25 of the seat cushion SC is guided and landed on the vehicle floor, the locked portion 10c of the front leg 10 is provided at a position to be guided to the end position 31a on the lower front side of the guide portion 31.
When the seat back SB is further tilted, the seat back SB can be completely tilted, and the back surface of the seat back SB is used as a loading surface of the luggage compartment (see FIG. 8).

That is, when the seat back frame 7 falls to a predetermined angle, the locked portion 10c, which is the lower end of the front leg 10, is removed from the insertion / extraction port 23 of the locking device 20 and guided by the guide portion 31, and the front end portion 25 of the seat cushion SC is When landing on the vehicle floor, the locked portion 10c of the front leg 10 is guided to the lower and front end position 31a of the guide portion 31.

  By adopting such a configuration, it is possible to prevent the seat cushion SC from hitting the vehicle floor in a state where the seat back SB is completely collapsed, and to prevent the seat cushion SC from being damaged or dirty. In such a configuration, the degree of freedom of setting the front legs 10 with respect to the seat cushion frame 6 can be increased in consideration of the load received by the front legs 10 according to the shape and size of the dive down seat 1. That is, the design freedom of the front leg 10 and the seat cushion frame 6 can be increased. In addition, since the locking device 20 is fixed on the upper rail 2b side, the seat back SB can be completely tilted down without the first hinge portion 11 moving in the front-rear direction, whereby the upper rail 2b It is possible to adopt a slide rail 2 having a slide position adjusting function.

  Further, since the front leg 10 rotates while sliding on the surface of the guide part 31 when the locked part 10c is removed from the insertion / extraction port 23 of the locking device 20, the rotation posture of the front leg 10 can be controlled. . Accordingly, it is possible to prevent the front leg 10 from becoming suddenly free, and the front leg 10 can be prevented from being damaged or causing a collision sound when the locked portion 10c of the front leg 10 collides with the vehicle floor from a high position. Further, the guide portion 31 can also function as a guide for the front leg 10 until the locked portion 10c of the front leg 10 is mounted on the locking device 20.

  In the above-described embodiment, the case of a dive down seat having a slide position adjusting function has been described, but it goes without saying that the present invention can also be applied to a dive down seat not having a slide position adjusting function. Such a dive down seat has substantially the same basic configuration as a dive down seat having a slide position adjusting function, but the first hinge 11 is rotatably connected to the vehicle floor, and the lock device 20 is fixed to the vehicle floor. Has been. In such a configuration, the degree of freedom of setting the front legs 10 with respect to the seat cushion frame 6 can be increased in consideration of the load received by the front legs 10 according to the shape and size of the dive down seat 1. That is, the design freedom of the front leg 10 and the seat cushion frame 6 can be increased.

  A support leg 25 that abuts the vehicle floor is provided at the front end of the seat cushion frame 6. The support leg 25 is exposed from the body portion 25 a welded to the front end of the seat cushion frame 6 and the seat cushion SC. The contact portion 25b.

  As another embodiment, by adopting a locking device 20 using a leaf spring, the locked portion 10c of the front leg 10 can be rotated in the receiving portion 21, and the front leg 10 can be rotated by the elastic force of the leaf spring. Can be attached to the receiving portion 21 of the locking device 20 with one touch, and the locked portion 10c of the front leg 10 can be attached from the receiving portion 21 of the locking device 20 to the upper constricted portion and the lower constricted portion 22 with one touch. Can be removed while spreading.

  Further, at the upper end of the guide portion 31, when the locked portion 10c of the front leg 10 is detached from the locking device 20, a fulcrum that regulates the hanging portions 10a and 10b from below during rotation about the locked portion 10c. When such a configuration is adopted, the hanging portions 10a and 10b of the front leg 10 come into contact with the fulcrum part 32, so that the locked portion 10c of the front leg 10 is locked by the locking device 20 according to the lever principle. It can be easily removed from the receiving portion 21 of the.

  Further, a concave portion 33 for entering the hanging portions 10a and 10b with the seat back SB fully raised can be formed at the front end of the under cover 30. In this state, the hanging portions 10a and 10b are recessed. It contacts the inclined back surface 33a. Further, the side surfaces 33b of the recess 33 prevent the hanging portions 10a and 10b from shaking in the left-right direction. The locking device 20 is exposed from the cutout portion 35 of the under cover 30.

  In the above description, the case of a dive down sheet is described, but it is needless to say that a chip up sheet can be used. When the seat cushion SC is rotated in the direction of the seat back SB and the front leg 10 is rotated toward the seat cushion SC, the seat cushion SC and the front leg 10 are locked to the seat back SB side by a conventionally known lock mechanism, and the The upper surface of the cover 30 becomes a space area, and this space area can be used as a luggage room or the like.

  SB ... Seat back SC ... Seat cushion 1 ... Dive down seat 2 ... Slide rail 2a ... Under rail 2b ... Upper rail 6 ... Seat cushion frame 7 ... Seat back frame 10 ... Front legs 10a, 10b ... Hanging part 10c ... Locked part 11 ... 1st hinge part 12 ... 2nd hinge part 13 ... 3rd hinge part 20 ... Locking device 21 ... Receiving part 22a ... Upper constriction part, 22b ... Lower constriction part 23 ... Outlet 24a ... Upper receiving piece, 24b ... Lower receiving piece 25 ... Support leg 30 ... Under cover 31 ... Guide part 32 ... Support part

Claims (4)

In a dive down seat equipped with a seat cushion that can move back and forth along the slide rail, and a seat back that can be moved forward and backward with respect to the seat cushion,
A first hinge portion rotatably connecting a lower end of a seat back frame of the seat back to an upper rail of the slide rail;
A second hinge portion that pivotably connects a rear end of the seat cushion frame of the seat cushion to the seat back frame;
A third hinge for pivotally connecting the upper end of the front leg to the seat cushion frame;
A locking device fixed on the upper rail side, wherein the lower end of the front leg is detachable from an upper insertion / removal opening, and the lower leg of the front leg is rotatably accommodated.
A guide portion is provided for guiding the lower end of the front leg until it reaches the vehicle floor when the lower end of the lock device is removed from the insertion / extraction port, and the upper end portion of the guide portion is disposed forward of the insertion / extraction port, and A dive-down seat characterized by extending obliquely downward and forward from the upper end. In the dive down seat with a seat back that can be moved forward against the seat cushion,
A first hinge portion that rotatably connects a lower end of a seat back frame of the seat back to a vehicle floor;
A second hinge portion that pivotably connects a rear end of the seat cushion frame of the seat cushion to the seat back frame;
A third hinge for pivotally connecting the upper end of the front leg to the seat cushion frame;
A locking device fixed on the vehicle floor side, wherein the lower end of the front leg is detachable from an upper insertion / removal port, and the lower end of the front leg is rotatably accommodated;
A guide portion is provided for guiding the lower end of the front leg until it reaches the vehicle floor when the lower end of the lock device is removed from the insertion / extraction port, and the upper end portion of the guide portion is disposed forward of the insertion / extraction port, and A dive-down seat characterized by extending obliquely downward and forward from the upper end. The dive down seat according to claim 1 , wherein the guide portion is provided on an under cover disposed between the seat cushion and the slide rail.   The dive down seat according to claim 2, wherein the guide portion is provided on an under cover disposed between the seat cushion and the vehicle floor.