JP5796045B2 - 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.

A first invention is a dive down seat including a seat cushion that is movable back and forth along a slide rail, and a seat back that is movable 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.
When the seat back frame is tilted, the front end portion of the seat cushion lands on the vehicle floor, and when the seat back frame is further tilted, the link is constituted by the first, second, and third hinge portions and the lower end of the front leg. The relationship is broken, and the lower end of the front leg is disengaged from the insertion / removal opening of the locking device.

  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 front end portion of the seat cushion lands on the vehicle floor and the seat back is further tilted, the link relationship is broken, and the lower end of the front leg is removed from the insertion / extraction 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, after the front end of the seat cushion has landed, the lower end of the front leg is removed from the insertion / extraction port of the locking device by tilting the seat cushion frame. Therefore, the front legs suddenly become free, and it is possible to prevent damage to the front legs caused by collision with the vehicle floor from the position where the lower end of the front legs is high, and the occurrence of collision noise, and after the front end of the seat cushion has landed Thus, since the lower end of the front leg is detached from the insertion / removal port of the locking device, 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

2nd invention is a dive down seat provided with a seat back which can be moved forward with respect to a 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;
When the seat back frame is tilted, the front end portion of the seat cushion lands on the vehicle floor, and when the seat back frame is further tilted, the link is constituted by the first, second, and third hinge portions and the lower end of the front leg. The relationship is broken, and the lower end of the front leg is disengaged from the insertion / removal opening of the locking device.

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 front end portion of the seat cushion lands on the vehicle floor and the seat back is further tilted, the link relationship is broken, and the lower end of the front leg is removed from the insertion / extraction 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, after the front end of the seat cushion has landed, the lower end of the front leg is removed from the insertion / extraction port of the locking device by tilting the seat cushion frame. Therefore, the front legs suddenly become free, and it is possible to prevent damage to the front legs caused by collision with the vehicle floor from the position where the lower end of the front legs is high, and the occurrence of collision noise, and after the front end of the seat cushion has landed Thus, since the lower end of the front leg is detached from the insertion / removal port of the locking device, the seat cushion can be prevented from suddenly falling.

  The front end portion of the seat cushion is a support leg provided on the lower surface side of the seat cushion. With this support leg, the seat cushion does not directly hit the vehicle floor, and the seat cushion can be prevented from being damaged or dirty.

  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 after the front end of the seat cushion has landed, the front leg is removed from the insertion / removal port of the lock device, so that the seat cushion suddenly drops. Can be prevented.

It is a perspective view which shows the frame structure of the dive down seat which concerns on this invention. FIG. 2 is a front view showing a frame structure of the dive down seat shown in FIG. 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 a dive down seat before a front leg comes off in a state where a seat back is in a front-end state. It is a side view of the dive down seat in the state where the seat back is completely collapsed. It is a perspective view which shows other one Embodiment of the dive down sheet | seat shown based on this invention.

  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 formed by the third hinge portion 13 by the seat cushion frame 6. It is connected so that it can rotate freely.

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

  The front leg 10 is made of a pipe material bent in 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. The locked portion 10 forms the lower end of the front leg 10.

  Bases 14a and 14b are attached to the left and right pipe parts 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 attached to the bases 14a and 14b. 3 is pivotally supported by a 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 member 10c is rotatably supported in the receiving portion 21, and both constitute a fourth link. .

  This dive down seat has a link mechanism in which the first to fourth hinge portions 11 to 14 have four links 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 lock device 20. Thus, the seat cushion SC can be moved forward in conjunction with the forward tilt of the seat back SB.

  In a state where the locked portion 10c that forms the lower end of the front leg 10 is accommodated in the receiving portion 21 of the locking device 20, a link mechanism is configured by cooperation with the first to third hinge portions 11 to 13, thereby The seat cushion SC can be moved forward in conjunction with the forward tilt of the seat back SB (see FIGS. 3 and 4). That is, the seat back SB can be tilted while the seat cushion SC is advanced to a position where the link relationship is established.

  Then, when the seat back frame 7 is tilted and the support leg 25 which is the front end portion of the seat cushion SC is landed on the vehicle floor, and when the seat back frame 7 is further tilted, the locked portion 10c of the front leg 10 is inserted into and removed from the locking device 20. 23. As shown in FIGS. 6 and 7, after the support leg 25 of the seat cushion frame 6 has landed on the vehicle floor, if the seat back SB is further tilted, the link relationship is lost, and the support leg 25 at the front end of the seat cushion SC is placed on the vehicle floor. Accordingly, the third hinge 13 of the seat cushion SC is also advanced. When the third hinge 13 moves forward, the front leg 10 of the seat cushion SC rotates about the third hinge as shown in FIG. 6 in the upward direction (C direction in the drawing). The regulation of the forward tilting of the seat back SB is released, the seat back SB can be completely tilted, and the back surface of the seat back SB is used as the loading surface of the luggage compartment (see FIG. 7).

  As shown in FIG. 6, when the support leg 25 of the seat cushion frame 6 lands on the vehicle floor, the length between the second hinge 12 and the third hinge 13 and the distance between the first hinge 11 and the second hinge 12. The sum of the lengths is the length of the third hinge 13 and the locking device 20 that houses the locked portion 10c of the front leg 10, and the length of the locking device 20 that houses the first hinge 11 and the locked portion 10c of the front leg 10. Therefore, when the seat back SB is further tilted after the support leg 25 of the seat cushion frame 6 has landed on the vehicle floor, the link relationship is broken and the locked portion 10c of the front leg 10 is locked. It moves in the release direction against the elastic force of the device 20, and the front leg 10 is detached from the insertion / extraction port 23 of the lock device 20.

  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.

  Since the to-be-locked portion 10c of the front leg 10 is detached from the insertion / extraction port 23 of the locking device 20 by tilting the seat cushion frame 7 after the support leg 25 of the seat cushion SC has landed, the front leg 10 suddenly becomes free. Thus, it is possible to prevent the front leg 10 from being damaged and the occurrence of a collision sound due to the locked portion 10c of the front leg 10 colliding with the vehicle floor from a high position, and after the support leg 25 of the seat cushion SC has landed, Since the locked portion 10c of the front leg 10 is disengaged from the insertion / extraction port 23 of the locking device 20, the seat cushion SC can be prevented from suddenly dropping.

  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.

  As another embodiment, by adopting the 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, as shown in FIG. 8, an under cover 30 may be provided between the seat cushion SC and the slide rail 2. The under cover 30 can be used as a blindfold for closing a gap between the seat cushion SC and the slide rail 2.

  The under cover 30 has a guide portion 31 that is guided when the locked portion 10c of the front leg 10 is removed from the insertion / removal opening 23 of the locking device 20 and extends forward from the insertion / removal opening 23 and obliquely downward and forward from the upper end portion. Then, 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 / removal port 23 of the locking device 20, so that the rotation posture of the front leg 10 can be controlled. it can. 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 addition, as shown in FIG. 8, concave portions 32 and 33 are formed at the front end of the undercover 30 to allow the hanging portions 10a and 10b to enter with the sea back SB fully raised. In this state, the drooping portions 10a and 10b abut against the inclined rear surface of the recess. Further, the both sides of the recess 33 prevent rattling of the hanging parts 10a, 10b in the left-right direction. The locking device 20 is exposed from the cutout portion 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 ... Undercover

Claims (3)

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.
When the seat back frame is tilted, the front end portion of the seat cushion lands on the vehicle floor, and when the seat back frame is further tilted, the link is constituted by the first, second, and third hinge portions and the lower end of the front leg. A dive down seat characterized in that a relationship is broken and the lower end of the front leg is disengaged from the insertion / removal opening of the locking device. 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;
When the seat back frame is tilted, the front end portion of the seat cushion lands on the vehicle floor, and when the seat back frame is further tilted, the link is constituted by the first, second, and third hinge portions and the lower end of the front leg. A dive down seat characterized in that a relationship is broken and the lower end of the front leg is disengaged from the insertion / removal opening of the locking device.   The dive down seat according to claim 1 or 2, wherein the front end portion of the seat cushion is a support leg provided on the lower surface side of the seat cushion.