JPH057960Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a seating surface adjustment mechanism for a seat back in a vehicle seat, particularly a bench seat such as a rear seat.

[Prior art] In conventional vehicle seats, the rear seat is mainly a bench seat for two or three people, and the tilt of the seat back is adjusted using a power reclining device or manual lever, and the seat cushion is moved back and forth using a power sliding device. The seat bag and seat cushion were then stopped and fixed at a position that suited the passenger's preference.

[Problems to be solved by the invention] Conventional vehicle seats are configured as described above, and the inclination of the seat cushion can be adjusted, but it is not possible to adjust the unevenness of the seat back or seating surface to suit the passenger's preference. There were some problems, such as not being able to make adjustments.

This invention was made in order to solve the above-mentioned problems, and the object is to obtain a vehicle seat in which the seating surface of the seat bag can be adjusted to suit the passenger.

[Means for Solving the Problems] A vehicle seat according to this invention includes a movable cushion body consisting of an upper cushion body, a middle cushion body, and a lower cushion body connected by a hinge, and upper and lower end portions of the movable cushion body. One of them is pivotally attached to the seat frame via a support shaft so as to be freely rotatable in the front and back direction, and the other is locked to a guide part provided on the frame to be movable in the front and rear direction, and the guide part is A drive that extends in the front-rear direction and is inclined so that the rear end side is close to the support shaft direction, and that an arm is attached to the cushion body on the side that is locked by the guide part and drives this arm in the vertical direction. It is held through a mechanism.

[Function] The vehicle seat according to this invention includes a movable cushion body consisting of an upper, middle, and lower cushion body connected by a hinge, and a movable cushion body that extends in the front-rear direction and is inclined so that the rear end side approaches the spindle direction. A guide portion and a drive mechanism that drives an arm attached to the cushion body in the vertical direction move the movable cushion body along the guide portion toward the support shaft, causing the movable cushion body to protrude from the seat surface;
Change the unevenness of the seatback surface.

[Example] An example of this invention will be described below with reference to FIGS. 1 and 2. In the figure, 1 is a seat back, which has rectangular holes 2, 2 on the left and right sides of the seat surface 1a, respectively. 3 is a movable cushion body;
It consists of an upper cushion body 3a having an inverted concave shape, a middle cushion body 3b having an inverted Y shape, and a lower cushion body 3c having a convex shape. The movable cushion body 3
The cushion bodies 3a to 3c are rotatably connected to each other by a hinge 4, and are rotatably connected to the hole 2 by a support shaft 3d provided on the lower end side of the lower cushion body 3c. 3
It is slidably engaged with a guide portion 5 provided on the upper side of the side surface 2a of the hole 2 by a pin 3e provided on the upper side surface of the hole 2, and is provided so as to be movable in the front-rear direction. The guide portion 5 extends in the front-rear direction and has a rear end approaching the support shaft 3d.
In other words, it is inclined downward. 6 is a drive mechanism, which includes a motor 6a that is a drive source, a gear mechanism 6b that transmits the force of the motor 6a, and this gear mechanism 6b.
It consists of a screw 6d that is rotated by the screw 6d, and a nut 6e that is unrotatably locked by an arm 7 attached to the upper cushion body 3a and moves along the screw 6d. This drive mechanism 6 is provided so as to extend in the vertical direction of the seat bag 1.

Next, the operation will be explained. The movable cushion body 3 is housed along the seat surface 1a of the seat bag 1, as shown on the right side of the seat bag 1 in FIG. 1 and as shown in FIG. 2b. When a switch (not shown) installed near the seat is turned on, motor 6
a rotates the screw 6d via the gear mechanism 6b, and the nut 6e moves downward. The nut 6e moves the upper cushion body 3a downwardly through the arm 7, that is, the upper cushion body 3a
The seat bag 1 moves toward the support shaft 3d of the lower cushion body 3c and toward the back side of the seat bag 1 along the direction. The movable cushion body 3 rotates so as to protrude from the seat surface 1a of the seat bag 1, as shown on the left side of the seat bag 1 in FIG. 1 and as shown in FIG. 2a,
It rises from the seat surface 1a of the seat back 1. The amount of movement of the movable cushion body 3 is regulated by the guide portion 5.

In this embodiment, the movable cushion bodies 3 are provided on each of the left and right seating surfaces of the seat bag 1, but the movable cushion bodies 3 may be provided integrally on the left and right sides. Further, it may be provided not only in the seat bag 1 but also in the seat cushion 9.

[Effects of the invention] As described above, according to this invention, a vehicle seat has a movable cushion body consisting of an upper, middle, and lower cushion body connected by a hinge, and a movable cushion body that extends in the front-rear direction and has a support shaft on the rear end side. The guide section is provided with a guide section that is inclined so as to be close to each other in the direction, and a drive mechanism that drives the arm attached to the cushion body in the vertical direction, so that the unevenness of the seat surface can be adjusted to suit the passenger's preference. The seat is warm and you won't get tired.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a vehicle seat which is an embodiment of this invention, and FIGS. 2a and 2b are cross-sectional views when the seat is in operation and when it is stored. DESCRIPTION OF SYMBOLS 1... Seat back, 2... Hole, 3... Movable cushion body, 5... Guide part, 6... Drive mechanism.

Claims (1)

[Scope of utility model registration request] A movable cushion body consisting of an upper cushion body, a middle cushion body, and a lower cushion body connected by a hinge, and one of the upper and lower ends of this movable cushion body is rotatable in the front and rear directions relative to the seat frame via a support shaft. and the other end is locked to a guide part provided on the frame so as to be movable in the front and back direction, and the guide part extends in the front and rear direction and is inclined so that the rear end side approaches the direction of the support shaft. 1. A vehicle seat, characterized in that an arm is attached to the cushion body on the side that is locked by the guide portion, and the arm is held via a drive mechanism that drives the arm in the vertical direction.