JP5796042B2 - 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 can move 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.
When the seat back frame falls to a predetermined angle, the link relationship constituted by the first, second, and third hinge portions and the lower end of the front leg is broken, and the lower end of the front leg is inserted and removed from the locking device. It is characterized by coming out of the mouth.

  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, 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;
The front end of the seat cushion frame includes a support leg that comes into contact with the vehicle floor ,
When the seat back frame falls to a predetermined angle, the link relationship constituted by the first, second, and third hinge portions and the lower end of the front leg is broken, and the lower end of the front leg is inserted and removed from the locking device. It is characterized by coming out of the mouth.

  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 until the 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.

The sum of the length between the second hinge portion and the third hinge portion and the length of the third hinge portion and the lock device that houses the lower end of the front leg is equal to the first hinge portion and the front leg. characterized in that the locking device for housing the lower end of the length and the first hinge portion and the length sum of between the second hinge portion is unequal.

  ADVANTAGE OF THE INVENTION According to this invention, the setting freedom degree of the front leg with respect to a seat cushion frame can be raised.

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 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 which concerns 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 and a reclining lever 3 that freely tilts the seat back SB are provided. 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.

  The front leg 10 is made of a pipe material bent in a substantially trapezoidal shape, and is locked to be a lower end of the front leg 10 that extends in the horizontal direction between the lower ends of the left and right hanging parts 10a and 10b and the left and right hanging parts 10a and 10b. Part 10c. 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 FIGS. 3 and 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 easily. It has an upper constricted portion 22a and a lower constricted portion 22b for preventing it from coming off, and an upper receiving piece 24a and a lower receiving piece 24b that serve as a guide when the locked portion 10c is inserted. . 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 part 10c is locked to the locking device 20, the pipe-like locked part 10c is rotatably supported in the receiving part 21, and both form 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.

  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. The length of the locking device 20 that houses the first hinge 11 and the locked portion 10c of the front leg 10 and the sum of the lengths between the first hinge 11 and the second hinge 12 are set unequal. Therefore, when the seat back SB is tilted, the link relationship is lost, and the seat cushion SC is moved forward (in the direction of arrow A) as shown in FIG. The part 10c is detached upward (in the direction of arrow B). As a result, the restriction of the forward movement of the seat cushion SC and 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. 6) ).

In this dive down seat, 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 locking device 20 that houses the locked portion 10c of the front leg 10 is the first. This is set to be larger than the sum of the length of the lock device 20 that houses the hinge 11 and the locked portion 10 c of the front leg 10 and the length between the first hinge 11 and the second hinge 12.
Furthermore, the length between the second hinge 12 and the third hinge 13 is set larger than the length of the lock 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 tilted, the lengths of the second hinge 12 and the third hinge 13 do not change. However, when the seat back SB is tilted, the lengths of the second hinge 12 and the locking device 20 are increased. If it becomes smaller than the length of the 2nd hinge 12 and the 3rd hinge 13, link relation will collapse and the to-be-locked part 10c of the front leg 10 will remove | deviate upwards (arrow B direction) from the insertion / extraction opening 23 of the locking 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. Moreover, since the locking device 20 is fixed on the upper rail 2b side, the seat back SB can be moved without providing a mechanism in which the first hinge portion 11 moves in the front-rear direction in conjunction with the dive down of the seat back SB. It can be completely defeated, which makes it possible to adopt a dive-down seat with a slide position adjustment function.

  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. 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.

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

  As another embodiment, as shown in FIG. 7, an under cover 30 can 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.

  As shown in FIG. 7, recesses 32 and 33 are formed at the front end of the under cover 30 to allow the hanging parts 10a and 10b to enter with the seat back SB fully raised. Further, the both sides of the recesses 32 and 33 prevent the hanging parts 10a and 10b from shaking in the left-right direction. When the under cover 30 is provided, the locking device 20 is exposed from a notch formed in the under cover 30.

  In the above description, the case of a dive-down sheet is described, but it goes without saying that it can be a chip-up sheet. 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)

A dive down seat comprising a seat cushion that can move 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.
When the seat back frame falls to a predetermined angle, the link relationship constituted by the first, second, and third hinge portions and the lower end of the front leg is broken, and the lower end of the front leg is inserted and removed from the locking device. A dive-down seat that comes off the mouth. A 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;
The front end of the seat cushion frame includes a support leg that comes into contact with the vehicle floor ,
When the seat back frame falls to a predetermined angle, the link relationship constituted by the first, second, and third hinge portions and the lower end of the front leg is broken, and the lower end of the front leg is inserted and removed from the locking device. A dive-down seat that comes off the mouth. The sum of the length between the second hinge portion and the third hinge portion and the length of the third hinge portion and the lock device that houses the lower end of the front leg is equal to the first hinge portion and the front leg. 3. The dive down according to claim 1, wherein a length of the lock device that houses a lower end of the first hinge portion and a sum of lengths between the first hinge portion and the second hinge portion are unequal. Sheet.