JPS6220045B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat cushion inclination adjustment device for an automobile.

In an automobile seat cushion, in order to provide a comfortable driving or sitting posture to the occupants, the so-called cushion height, which is the height from the floor surface to the front edge of the seat cushion, must be appropriate. By the way, car seat cushions are suitable for children, adults,
Elderly people and people of various physiques sit on seats, and the appropriate cushion height is different for each person, and even for the same person, the appropriate cushion height differs depending on the sitting posture. Therefore, in order to compensate for variations in occupant physique and seating posture and provide a comfortable seating posture for as many occupants as possible, the cushion height can be freely selected by adjusting the inclination angle of the seat cushion. A seat cushion inclination adjustment device is attached to the seat cushion, which can be displaced to provide a comfortable seating posture that corresponds to each person's physique and sitting posture. However, the conventional seat cushion inclination adjustment device of this type is large and has the disadvantage of deteriorating the cushioning properties of the seat cushion. In other words, in order to assemble the seat cushion inclination adjustment device to the seat cushion, it is necessary to cut out the pad of the seat cushion and assemble it, so if the seat cushion inclination adjustment device takes up space, the pad notch becomes It becomes larger and the cushioning properties of the seat cushion deteriorate. In addition, in order to adjust the inclination angle of the seat cushion using a conventional seat cushion inclination adjustment device, operate the operating lever located on the side of the seat, and then release the seat cushion with the lock mechanism released. After holding the seat cushion so that the inclination angle becomes the desired inclination angle, the locking mechanism is locked again using the operation lever while maintaining this state, so that the inclination angle of the seat cushion becomes the desired inclination angle. Another drawback was that the adjustment work was complicated.

In view of the above-mentioned drawbacks of the conventional art, the present invention improves and eliminates them.In order to improve the cushioning performance of the seat cushion, it provides a compact seat cushion inclination adjustment device that eliminates waste, and at the same time,
This facilitates the work of adjusting the inclination angle of the seat cushion using the seat cushion inclination adjustment device.

EMBODIMENT OF THE INVENTION The structure of this invention will be described below using an example in which the structure of the present invention is assembled to a rear seat cushion shown in the drawings.

In the drawing, 1 is the rear seat cushion,
Although not shown in the drawing, a seat spring is stretched over a seat frame 2 formed by bending a metal pipe or the like into a predetermined shape, a seat pad is placed above it, and these are covered with a seat cover. It is configured as follows. 3, 3 are frame lines that are integrally attached to the middle part of the seat frame 2 of the rear seat cushion 1 by welding and arranged in parallel;
The rear end folded edges 3a, 3a are attached to the hinges 5, 5 which are fixed on the floor panel 4 at the rear of the vehicle body, and the seat frame 2 of the rear seat cushion 1 connects the hinges 5, 5 through the frame lines 3, 3. It is installed to swing on a fulcrum. Reference numerals 6 and 6 denote a pair of left and right tilt adjusters disposed on both sides of a seat cushion inclination adjustment device mounting portion provided at the front portion of the seat frame 2, and are continuous with each other via a left and right interlocking rod 7.

As shown in FIG. 4, the tilt adjuster 6 includes a support bracket 8, a swing base plate 9, and a ratchet 1.
0, a locking piece 11, a coil spring 12, and a link 13.

The support bracket 8 is integrally attached by welding to a metal fitting 15 fixed on the floor panel 4, and the locking piece 1 is attached to a locking piece mounting hole 16 provided in a side wall 8a facing a housing 9 corresponding to a swing board.
1 is pivotally attached with a caulking pin 17 so as to be able to freely swing, and a locking piece stopper 18 that comes into contact with the locking piece 11 is cut and raised at a predetermined position on the side wall 8a. The swing board will be hereinafter referred to as a housing, but this is called a housing because it has a shape that accommodates the ratchet 10 and other members.

The housing 9 has a ratchet 10 integrally attached to the inner surface of a side wall 9a facing the support bracket 8 by welding, and a locking release piece 19 and a locking set piece that come into contact with the locking piece 11 at predetermined positions on the side wall 9a. 20 is cut and formed. The housing 9 has a left and right interlocking rod 7 at one end of the side wall 9a.
The tip 7a of the left-right movement rod 7 is inserted into the insertion hole 21 provided at one end of the side wall 8a of the rapport bracket 8, and the tip 7a of the left-right movement rod 7 is inserted into the insertion hole 21. It is secured by a snap ring 22 and a washer 23 and is attached to the support bracket 8 so as to be rotatable about the insertion hole 21 as a fulcrum.

The ratchet 10 is welded to the inner surface of the side wall 9a of the housing 9, and has a large number of teeth 24 formed on the surface facing the locking piece 11.

The locking piece 11 is formed into a bifurcated shape, and the latch 1
Teeth 2 of ratchet 10 on one upper side facing 0
Forming a claw 25 that engages with 4 and at the lower part,
A protrusion 26 is formed to come into contact with the locking release piece 19 formed on the support bracket 8, and a locking hole 27 into which one end 12a of the coil spring 12 is locked is formed on the other side.

The coil spring 12 has one end 12a connected to the locking piece 1.
1, and the other end 12b is hung in a latching hole 28 formed in a part of the side wall 8a of the support bracket 8. By applying a biasing force to elastically engage the pawls 25 of the locking piece 11 with the teeth 24 of the ratchet 10, downward rotation of the housing 9 is prevented. The biasing force applied to the locking piece 11 by the coil spring 12 is reduced when the locking piece 11 is rotated clockwise by the locking release piece 19 until it contacts the locking piece stopper 18. The positional relationship of each member is set so that the direction of the force is reversed and the locking piece 11 is pressed clockwise.

The link 13 has one end pivotally attached to a mounting hole 29 provided at the other end of the side wall 9a of the housing 9 with a caulking pin 30, and the other end pivotably attached with a caulking pin 31. The attached mounting bracket 32 is integrally attached and fixed to the front part of the seat frame 2 of the rear seat cushion 1.

Reference numeral 14 denotes a tilt handle that is integrally attached and fixed to the front middle of the seat frame 2 of the rear seat cushion 1. By moving the tilt handle 14 up and down, the seat frame 2 of the rear seat cushion 1 is moved around the hinges 5, 5 as fulcrums. oscillate.

The above is the configuration of the seat cushion inclination adjustment device according to the present invention, and next, the operation procedure in the above configuration will be explained.

Fig. 2 shows a state in which the seat cushion 1 is at the lowest position. First, when raising the cushion height of the seat cushion 1 from this state,
When the tilt handle 14 is pulled upward, the seat frame 2 of the seat cushion 1 moves to the hinge 5,
5 as a fulcrum, and the front portion of the seat frame 2 is pulled upward. seat frame 2
When the front part of the housing 9 is pulled upward, the housing 9 swings upward relative to the support bracket 8 via the link 13 about the left and right interlocking rod 7, and the ratchet 10 attached to the inner surface of the side wall 9a of the housing 9 moves together. be pulled upwards. When the tilt handle 14 is released at an arbitrary cushion height of the seat cushion 1, an arbitrary tooth 24 of the ratchet 10 engages the locking piece 11 as shown in FIG.
As a result, the seat cushion 1 is held at an arbitrary cushion height position, and the adjustment of the cushion height is completed.

Next, if you want to return the cushion height of the seat cushion 1 from the state shown in FIG. 5 to the lowest position shown in FIG. 3, pull the tilt handle 14 further upwards.
When the seat frame 2 of the seat cushion 1 is swung to the uppermost position using the hinges 5, 5 as fulcrums, the ratchet 10 separates from the pawl 25 of the locking piece 11 and rotates at the same time, as shown in FIG. A lock release piece 19 is cut and formed on the side wall 9a of the housing 9.
comes into contact with the protrusion 26 of the locking piece 11, and the housing 9
As the locking piece 11 rotates, the coil spring 1
2, and the locking piece 11 is pressed against a locking piece stopper 18 formed by cutting and raising the side wall 8a of the support bracket 8. At this time, the direction of the pressing force applied to the locking piece 11 by the coil spring 12 is reversed, and the locking piece 11 is pressed clockwise and maintains its posture, thereby releasing the ratchet mechanism. . When the ratchet mechanism is released, the tilt handle 14 is pushed down to swing the seat frame 2 of the seat cushion 1 downward about the hinges 5, 5, thereby pushing down the front part of the seat frame 2. Then link 13
The housing 9 swings downward with respect to the support bracket 8 using the left-right movement rod 7 as a pivot, and at the same time, the ratchet 10 attached to the inner surface of the side wall 9a of the housing 9 is returned to its original position, and at the same time, the side wall 9a is moved to a predetermined position. The locking set piece 20 cut and formed at a certain position comes into contact with the pawl 25 of the locking piece 11 and rotates the locking piece 11 in the counterclockwise direction.As shown in FIG. The pawl 25 is engaged with the top row of the teeth 24.

Next, when the cushion height of seat cushion 1 changes from an arbitrary state to another arbitrary state,
To increase the cushion height, simply pull up the tilt handle 14 further and change it to another arbitrary height, but to decrease the cushion height,
Once seat cushion 1 is returned to the lowest position,
Then, the seat cushion 1 is pulled up and changed to another desired height.

The seat cushion inclination adjustment device of this invention includes:
The angle adjustment mechanisms such as the ratchet 10, the locking piece 11, and the coil spring 12 are centrally housed in the housing 9, and the housing 9 itself functions as a part of the link mechanism, making it extremely compact. By simply attaching the support bracket 8 and housing 9 to the seat frame 2 and the metal fittings 15 fixed to the floor panel 4, the seat frame 2 and the like can be easily assembled without making any major modifications.

In the above description, the rear seat cushion was described as an example, but the present invention is not limited to this, and can be applied to a front seat cushion, and the pivot point of the seat frame is at the rear end. It is not limited.

As explained above, the present invention provides a swinging mechanism that has one end rotatably pivoted to a support bracket fixed to a stationary member of the vehicle body, and the other end pivoted to a link that is connected to a seat cushion frame. The pawl of a locking piece rotatably pivoted to the support bracket is elastically engaged with the teeth of a ratchet fixed to the base plate by a coil spring interposed between the locking pieces of the support bracket. The locking mechanism is housed to form a tilt adjuster, and the tilt adjuster is disposed on both sides of the front of the seat cushion frame, which has a rotation fulcrum at the rear, by connecting the housings to each other with interlocking rods. It is compact and can be easily assembled to a frame or the like without major modification, and has a practical effect of significantly improving the cushioning properties of the seat cushion. Furthermore, the vehicle seat cushion inclination adjustment device according to the present invention allows the inclination angle of the seat cushion to be adjusted by a simple operation such as lifting the seat to a desired position by holding a tilt handle fixed to the seat frame. In addition, unlike the conventional seat cushion inclination adjustment device, there is no need to release the lock mechanism using the operating lever, so the operability of the seat cushion inclination adjustment device can be improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a seat frame of a rear seat cushion to which the seat cushion inclination adjustment device of the present invention is assembled, Fig. 2 is a side view thereof, Fig. 3 is an enlarged side view of the main parts thereof, and Fig. 4 5 is an exploded perspective view of the tilt adjuster, and FIGS. 5 and 6 are enlarged side views of main parts showing the operation procedure. 1... Rear seat cushion, 2... Seat frame, 4... Floor panel, 5, 5... Hinge, 6, 6... Tilt adjuster, 7... Left and right interlocking rod, 8... Support bracket, 9... ...Swinging board, 10... Ratchet, 11... Locking piece,
12...Coil spring, 13...Link, 1
4...Tilt handle.

Claims (1)

[Claims] 1. A support bracket fixed to a stationary member of the vehicle body, a swinging board rotatably connected to the support bracket, and a link having one end rotatably connected to the swinging board and the other end connected to the seat frame. a ratchet having a large number of teeth fixed to a side wall of the support bracket facing the support bracket; A locking piece having an engaging pawl is interposed between the support bracket and the locking piece, and by elastically engaging the pawl of the locking piece with the teeth of the ratchet, the swinging base plate can be rotated downward. A coil spring is provided to protrude from the side wall facing the support bracket of the swing board, and when the swing board is rotated upward by more than a predetermined amount, it engages with the locking piece, and due to the elastic force of the coil spring. A tilt adjuster is constituted by a locking release piece for rotating the locking piece in the locking release direction against the rotational force, and the tilt adjuster is connected to both sides of the front part of the seat frame having a rotation fulcrum at the rear. 1. A seat cushion inclination adjustment device for an automobile, characterized in that two rocking boards are connected to each other by an interlocking rod.