JPS6321456Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lifter device, and more particularly, to a lifter device that raises and lowers a seat using a simple mechanism.

Various types of lifter devices have been devised for raising and lowering the seat portion of a seat, and a screw bar type is one that is generally well known. This is done by placing a threaded rod under the seat, interlocking the seat with this threaded rod, and rotating the threaded rod to move the threaded rod up and down. It is designed so that the parts can be raised and lowered.
In this conventional example, the seat is moved up and down by the rotation of the threaded rod, but since rotating the threaded rod manually requires a lot of effort, the threaded rod is rotated using an electric motor or the like. ing. In addition, since the rotational force generated by the electric motor is too fast for raising and lowering the seat, a reduction gear is installed between the threaded rod and the electric motor to give the screw rod the rotational force that allows the seat to rise and lower at an appropriate speed. That's what I do. in this way,
In the conventional example, various devices must be added to raise and lower the seat, which increases the number of manufacturing steps.
This led to higher costs.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a lifter device that has a simple mechanism and does not require troublesome operations.

The present invention will be explained below based on preferred embodiments shown in the drawings.

Figure 1 shows a seat 1 equipped with the lifter device of the present invention.
Indicates 0. This seat 10 includes a seat part 2 that is slidably supported on slide rails 1 and 1' fixed to the body of an automobile, a backrest part 3 that is rotatably attached to this seat part 2, and a backrest part 3 that is rotatably attached to this seat part 2. A lifter device 20 (not shown in FIG. 1) of the present invention is disposed at the bottom of the seat portion 2. Furthermore, a lever 5 is attached to a lifter device 20 below the front end of the seat 2 so as to protrude, and the seat 20 is raised and lowered by operating the lever 5.

Next, the lifter device 20 of the present invention will be explained with reference to the drawings from FIG. 2 onwards. The lifter device 20 includes side plates 21 and 21' slidably supported on slide rails 1 and 1', and side plates 21 and 21' that are slidably supported on slide rails 1 and 1'.
1 and 21', and fixed shafts 22 and 22' fixed to the front and rear ends thereof. The lever 5 located below the front end of the seat 2 shown in FIG. 1 is fixed to the bending lever 23, and when the lever 5 is moved up and down,
It also moves up and down. This bending lever 23 has a substantially L-shape, and an intermediate bending portion 23a is rotatably fixed to a support member 24. This support member 24 is fixed to the fixed shaft 22 by welding or the like. Further, one end of the first link 25 is rotatably attached to the rear end portion 23b of the bending lever 23, and the other end is rotatably attached to the lower end of the second link 26. The upper end of this second link 26 is fixed to a crankshaft 27, which rotates together with the second link 26.
is rotatably attached at both ends to the front end portions of the side plates 21, 21'. Furthermore, side plate 2
A crankshaft 27', which is the same as the crankshaft 27, is rotatably mounted in parallel with the crankshaft 27 near the rear end of the crankshafts 1 and 21', and a connecting link 28 is connected between the crankshafts 27 and 27'. Connected for free rotation. Lifting arms 2 are provided on both end sides of the crankshafts 27, 27'.
The rear ends of 9 to 32 are fixed. The crankshafts 27, 27' are bent from the point where the second link 26 or the connecting link 28 is attached to both ends, and the position where the lifting arms 29 to 32 are attached is the same as that of the second link 26 or the connecting link. 28 is above the installed position. At the tips of the lifting arms 29-32, mounting tables 33-36 on which cushion materials forming the seat portion are placed are mounted so as to be rotatable upward within a range of 45 degrees.

Further, a locking mechanism 60 is arranged around a locking member 61 which is rotatably attached to the support member 24.
This will be explained based on the diagram. The lock mechanism 60 includes a locking member 6 whose lower end is rotatably fixed to the support member 24.
1, a lock rod 62 provided at the intermediate portion of the second link 26 and engaged with the locking member 61, and a bending lever 2.
3 and a wire 63 connecting the locking member 61. This locking mechanism 60 has a structure that locks only against the lowering of the seat. First, lever 5
, so that the tip of the bending lever 23 moves upward. When the tip of the bending lever 23 moves upward, the rear end 23b moves forward about the bending part 23a. Along with this movement, the first link 25 also moves, and the second link 26 attached to the first link 25 rotates clockwise. The lock rod 62 provided on the second link 26 also rotates clockwise and moves so as to push open the teeth of the locking member 61. In this way, the teeth of the locking member 61 are tapered in the direction in which the lock rod 62 moves as the second link 26 rotates clockwise, so that the lock rod 62 can easily move to the adjacent tooth. However, if the locking rod 62 moves in the opposite direction, the locking member 61
Movement of the locking rod 62 is prevented by the teeth.

To release the lock mechanism 60, the lever 5 is pushed downward as shown in FIG. lever 5
rotates downward around the rotation axis 5B, and the lever 5
and a wire locking portion 5C facing the rotation axis 5B.
rotates upward around the rotation axis 5B. Due to this rotation of the wire locking portion 5C, the wire 63 is pulled, and the locking member 6 attached to the wire 63
1 rotates clockwise around the rotation axis 61a,
The engagement with the locking rod 62 is released. Note that the bending lever 23 is fixed until the engagement between the locking member 61 and the locking rod 62 is released. The bending lever 23 is therefore adapted to move after the locking mechanism 60 is released.

The operation of the lifter device 20 configured as above will be explained based on FIGS. 4 and 5.
First, when the lever 5 is pulled up, the tip 23c of the bending lever 24 rotates upward, and as the tip 23c rotates, the rear end 23b of the bending lever 23 moves forward and rotates to the rear end 23b. The movably fixed first link 25 also moves forward. And the first link 2
5, the second link 26 also rotates clockwise about the crankshaft 27. At this time, as described above, the locking rod 62 provided on the second link 26 also moves, moving from tooth to tooth of the locking member 61. The second link 26 and the crankshaft 27 are fixed, and the crankshaft 27
will rotate in the same way as the second link 26. Furthermore, at both ends of the crankshaft 27,
Lifting arms 29, 30 that rotate together with the crankshaft 27 are fixed, so that when they rotate together with the crankshaft 27, the tips of the lifting arms 29, 30 rise. This lifting arm 2
At the tips of 9 and 30, mounting tables 33 and 34 are placed upward.
It is fixed so that it can rotate within a range of 45 degrees, and as the tips of the lifting arms 29 and 30 rise, it moves upward while remaining horizontal. Further, the crankshaft 27' attached to the rear end portions of the side plates 21, 21' and the crankshaft 27 are rotatably connected by a connecting link 28, and the rotation of the second link 26 is connected to the crankshaft 27'. is also transmitted and rotates in the same manner as the crankshaft 27. Furthermore, the crankshaft 27' has an elevating arm 29 provided on the crankshaft 27,
30, with the same structure and operation as the mounting tables 33 and 34,
Lifting arms 31, 32 and mounting tables 35, 36 are provided. Therefore, the rotation transmitted from the second link 26 to the crankshaft 27' causes the lifting arms 31, 32 to rotate.
2, the mounting tables 35 and 36 rise. In addition, cushion material (not shown) serving as a seat is placed on the mounting tables 33, 34, 35, and 36 provided at four locations on both ends of the crankshafts 27 and 27'. 36, the seat will also rise. After the height of the seat is set to a desired position, when the lever 5 is stopped from being pulled up, the locking mechanism 60 is activated and the seat is fixed at that position. When you want to lower the seat, push the lever 5 downward and the lock mechanism 60 will be activated.
is released, the seat can be lowered, the seat is lowered by the weight of the occupant, and when the lever 5 is pulled up again, the locking mechanism is activated and the seat is fixed.

Further, the lever 5 is foldable at its base, and when the lifter device 20 is not operated, it is folded and stored below the seat portion 2, so that it does not get in the way of the seated person.

Note that the present invention is not limited to the above embodiments, as the crankshaft may be rotated through a link mechanism by operating a lever.

As explained above, the present invention involves attaching a lifting arm to the seat, fixing this lifting arm to the crankshaft, fixing a link plate to the crankshaft, attaching a lever to interlock with the link plate, and fixing the lifting arm to the crankshaft. The link plate is rotated around the crankshaft by operating the lever, the crankshaft is rotated by the rotation of the link plate, and the lifting arm fixed to the crankshaft is raised as the crankshaft rotates; Furthermore, a lock mechanism is provided which works in conjunction with the lever to restrict the rotation of the link plate, and this lock mechanism fixes the seat portion at a desired height. Therefore, since the seat is raised by the lever principle and the link mechanism, the seat can be raised and lowered manually without the need for a complicated mechanism. Furthermore, the structure is simple, the manufacturing process can be shortened, and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a seat equipped with a lifter device of the present invention, FIG. 2 is a perspective view of a lifter device showing an embodiment of the present invention, and FIG. 3 is a side view of a locking mechanism.
4 is a side view of the lifter device, and FIG. 5 is a side view of the lifter device with the lifting arm raised from the state shown in FIG. 4. 20...Lifter device, 23...Bending lever, 2
6...Second link (link board), 27, 27'...
Crankshaft, 28... Connection link, 29,
30, 31, 32... Lifting arm, 60... Lock mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A lifting arm to which a seat is attached, a crankshaft to which this lifting arm is fixed at both ends, a link plate fixed to this crankshaft, and a link plate that interlocks with this link plate. When the lever is operated, the link plate rotates around the crankshaft, and the crankshaft rotates with the rotation of the link plate, causing rotation of the crankshaft. The lifting arm is moved upward by the movement, and the seat attached to the lifting arm is raised, and the raised seat is interlocked with the lever to restrict the rotation of the link plate. A lifter device that is fixed at a desired height by. 2. The above-mentioned crankshaft and elevating arm are provided on the front end side of the seat, and a similar crankshaft and elevating arm are also provided on the rear end side of the seat, and these two crankshafts are connected by a connecting link. The rotation of the crankshaft on the front end side of the seat is transmitted to the crankshaft on the rear end side of the seat via the connection link, and the rotation of the two crankshafts causes
The lifter device according to claim 1, wherein the lifting arm is moved upward to raise the seat portion.