JP4136846B2 - Dive down seat - Google Patents

Description

  The present invention relates to an automobile seat, and more specifically, a dive down in which a seat cushion is moved forward in conjunction with a forward tilt of the seat back while being lowered onto the floor in the vehicle and the back of the forward seat back is used as a cargo loading surface. Regarding the sheet.

  In this type of dive down seat, for example, as disclosed in Japanese Patent Application Laid-Open No. 2002-154360, the rear end of the seat cushion is rotatably connected to the lower end of the seat back, and the lower end of the seat back is connected to the floor. The front end of the seat cushion is connected to the floor by a link, and the rear portion of the seat cushion and the seat back are connected by a hinge arm.

JP 2002-154360 A

  Accordingly, in the conventional products described above, the seat cushion is moved forward in conjunction with the forward tilt of the seat back. However, if the seat back is tilted forward, the seat back or the headrest may interfere with the seat back of the front seat. there were.

  Therefore, in order to avoid such interference, there has been a problem that the headrest must be removed from the seatback to be tilted forward or the front seat must be retracted forward.

  Therefore, an object of the present invention is to eliminate the problems of such a conventional dive down sheet.

To achieve the above object, the dive down seat according to the present invention is installed on the floor and supports the lower portion of the seat back in a slidable and lockable manner in the front-rear direction and the seat back can be moved forward. A slide member attached to the seat, an unlocking means for releasing the lock of the slide member in conjunction with a forward tilt of the seat back, and a rear portion of the seat cushion is slid into a vertically long slot provided in the center of the side portion of the seat back. An arm member that freely supports the shaft and a link member that is connected between the seat cushion and the floor and guides the seat cushion forward and downward.

  When the seatback is tilted forward to move forward, the slide member is unlocked in conjunction with it, and the seat cushion is moved forward by the arm member. Since the seat back rotates rearward around the shaft support portion of the arm member, it moves rearward by the slide member. Further, when the seat back is tilted forward, it interferes with the seat back of the front seat, but the reaction force causes the lower portion of the seat back to slide further rearward. Therefore, it is possible to automatically avoid interference with the seat back of the front seat, and the seat back can be tilted forward on the lowered seat cushion without any trouble.

Further, since the arm member is slidably supported in a vertically long slot provided in the center of the side portion of the seat back, when the seat back tilts forward and interferes with the front seat back, the seat back It is possible to move independently of the seat cushion by the long hole of the shaft support part of the arm member, and the lower part of the seat back automatically moves backward due to the reaction force from the front seat back and the gravity of the seat back. .

  According to the first aspect of the present invention, the front and rear of the seat can be adjusted while the seat cushion is a dive-down seat that moves forward and downward. In addition, since it is possible to automatically avoid interference with the front seat back in conjunction with the forward tilting operation of the seat back, there is no need to evacuate the front seat in advance, making it easy to use and easy to use. improves. In addition, it is not necessary to remove the headrest in order to avoid interference with the seat back of the front seat.

In addition, according to the present invention , the seat back can move independently with respect to the seat cushion. Therefore, when the seat back is tilted forward to lean forward and interferes with the seat back of the front seat, the reaction force from the seat back of the front seat and the gravity of the seat back in the forward tilted state lower the lower portion of the seat back. Can move backward and avoid the interference with the seat back of the front seat and can fall forward without any trouble.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show the use state of the dive down seat, in which SC is a seat cushion, SB is a seat back, 1 is a slide member composed of a movable rail 11 and a fixed rail 10, and 2 is unlocking of the slide member 1. Means 3 is an arm member for pivotally supporting the rear portion of the seat cushion to the center of the side portion of the seat back, and 4 is a link member for connecting the bottom front side of the seat cushion SC and the floor F1.

  Therefore, the seat back SB is slidably attached to the seat cushion SC by the slide member, and is disposed between the movable rail 11 constituting the slide member 1 and the lower end portion of the side frame 5 constituting the seat back SB. A recliner (not shown) is attached so that it can be moved forward and backward.

  The slide member 1 is lower than the rear floor F3 of the seat back SB, and a pair of left and right fixed rails 10 fastened to the floor F2 higher than the floor F1 storing the seat cushion SC, and is slidable on the fixed rails 10. The slide rail is composed of the movable rail 11 to be engaged, and is similar to the slide rail conventionally used for adjusting the front-rear position of the automobile seat.

Accordingly, a large number of lock holes 10A are opened on the fixed rail 10 side, and a lock piece 20 inserted and locked into the lock hole 10A is provided on the movable rail 11 side. It is slidably attached to the movable rail 11 side and is urged in the locking direction by the elasticity of a spring (not shown). In the figure, 11A... Indicates a roller of the movable rail 11 that rolls in the fixed rail 10.
The lock piece 20 is configured to move upward in the unlocking direction by an operating force of an operating lever (not shown).

  A frame of the seat back SB, for example, a lower end portion of the side frame 5 is attached to the movable rail 11 by a reclining device (not shown) having a conventionally known structure. Therefore, the seat back SB is attached to the slide member 1 so as to be able to be tilted forward and backward and to be slidable in the front-rear direction.

  The slide member 1 and the side frame 5 described above are provided with the unlocking means 2 for the slide member 1 including the release piece 21 and the protruding piece 22.

  That is, the lock release means 2 is the same as the walk-in mechanism that releases the lock of the slide member in conjunction with the forward tilt of the seat back. For example, the movable rail 11 of the slide member 1 has an L-shaped release piece. 21 is pivotally mounted at a substantially central portion by a pin 21A, and the lock piece 20 is pivotally supported by one end side of the release piece 21 by a pin 21B and fixed to the side frame 5 side at the other end side. An abutting portion 21C against which a lower portion 22B of 22 abuts is provided.

  Therefore, when the seat back SB is tilted forward with the pivoting portion 5A as the center of rotation, the lower portion 22B of the projecting piece 22 rotates rearward, so that the abutting portion 21C of the release piece 21 rotates in the same direction. Therefore, one end side of the release piece 21 rotates upward. As a result, the lock piece 20 slides upward against the elasticity of the spring, and the lock of the slide member 1 is released.

  In the side frame 5 of the seat back SB, a vertically long slot 51 is opened, and the rear end of the arm member 3 is pivotally supported by the support shaft 3A in the slot 51 so as to be slidable.

Therefore, the seat back SB can move independently with respect to the seat cushion SC by pivotally supporting the rear end of the arm member in the elongated long hole 51 provided in the side frame 5 .

The front end of the arm member 3 is formed by welding or extending a part of the cushion frame integrally with a cushion frame (not shown) disposed in the rear portion of the seat cushion SC.
Accordingly, the rear portion of the seat cushion SC is supported by the arm member 3 at the center of the side portion of the seat back SB.

The front part of the seat cushion SC is supported by the link member 4, and the link member 4 rotatably connects the floor F2 and the cushion frame front part of the seat cushion SC.
Accordingly, the seat cushion SC is configured to move forward and downward around the lower end of the link member 4 and be folded and stored on the frame F2.

Since it is configured as described above, when the slide member 1 is unlocked by operating the operating member in the usage state of the dive down seat shown in FIGS. 1 and 2, the front and rear positions of the dive down seat can be adjusted back and forth. It becomes.
Further, the tilt angle of the seat back SB can be adjusted by the reclining device. In FIG. 1, FSB in the drawing indicates a seat back of the front seat.

  Then, when the dive down seat is folded and stored when the dive down seat is not used, and the back of the seat back is used as a load stacking surface, first, as shown in FIG. 3, the seat back SB is slid by the reclining device. The lock on the member 1 is released, and the seat back SB is moved forward.

  As a result, as shown in FIG. 4, the side frame 5 of the seat back SB rotates forward, so that the lower portion 22 </ b> B of the projecting piece 22 rotates backward to rotate the release piece 21. Therefore, the lock piece 20 moves upward and the lock of the slide member 1 is released.

  When the seat back SB is tilted forward, the lower portion of the seat back SB slides forward on the slide member 1, and the seat cushion SC moves forward and downward accordingly.

  When the headrest H provided on the seat back SB interferes with the seat back FSB of the front seat due to the forward tilt of the seat back SB, the arm member 3 is slidably supported in the long hole 51 of the seat back SB as shown in the figure. The seat back SB automatically moves independently of the seat cushion SC.

This movement is made by the reaction force from the seat back FSB of the front seat and the gravity of the seat back SB itself.
Therefore, the seat back SB can tilt the seat back SB forward without any interference without interfering with the seat back FSB of the front seat, and the seat back SB is stored as shown in FIG. It becomes a surface.

Since the seat cushion SC is connected to the seat back SB by the arm member 3, the seat cushion SC is folded and stored on the floor F2 in conjunction with the forward tilt of the seat back SB.
In this state, the seat back SB slides rearward of the slide member 1 as shown in FIG.
When the seat back SB slides backward, the lock piece 20 is inserted into the locking hole 10A of the fixed rail 10 and locked (not shown).

It is explanatory drawing which shows the use condition of the sheet | seat which concerns on this invention. It is a partial expanded sectional view of FIG. It is explanatory drawing which shows the state which made the seat back lean forward from the state of FIG. FIG. 4 is a partially enlarged sectional view of FIG. 3. It is explanatory drawing which shows the state which accommodated the seat back and the seat cushion from the state of FIG. It is a partial expanded sectional view of FIG.

Explanation of symbols

  SB ... Seat back SC ... Seat cushion 1 ... Slide member 2 ... Lock release means 3 ... Arm member 4 ... Link member

Claims (2)

A slide member that is installed on the floor and supports the lower part of the seat back in a slidable and lockable manner in the front-rear direction with respect to the floor, and attaches the seat back so that it can be moved forward;
Unlocking means for unlocking the slide member in conjunction with the forward tilt of the seat back;
An arm member that slidably supports the rear portion of the seat cushion in a vertically long slot provided in the center of the side portion of the seat back;
A dive down seat having a link member connected between the seat cushion and the floor to guide the seat cushion forward and to a lowered position.
  The dive down seat according to claim 1, wherein the arm member is pivotally supported in a vertically long slot provided in a center of a side portion of the seat back.

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