JPH0415542Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a seat lift device that can raise and lower a seat for a vehicle such as an automobile in the vertical direction and tilt it backward.

[Conventional technology]

Various seat lift devices that can raise and lower seats for vehicles such as automobiles have been developed.
That is, as this seat lift device, for example, as shown in FIG.
A slide shaft 103 having a front threaded part 101 and a rear threaded part 102 that are threaded in opposite directions to each other, and an inner circumferential surface to be screwed into the front threaded part 101 and rear threaded part 102 of this slide shaft 103, respectively. It consists of a pair of slide bodies 104 having threaded holes (not shown), and an arm 105 rotatably attached to these slide bodies 104 and a cushion frame 105 on the seat side. What has been done is known. In this seat lift device, the seat side can be raised and lowered in the vertical direction with respect to the floor surface side by rotating an operation knob 106 attached to the tip side of the slide shaft 103. There is.

[Problem to be solved]

However, the seat lift device with the above configuration only has the function of raising and lowering the seat almost parallel to the floor, and therefore cannot be adjusted according to changes in the sitting height of each driver. Although it is possible to do this, simply raising and lowering the seat is not sufficient to demonstrate the length of the driver's legs and stable footwork, for example.

Therefore, in view of the above-mentioned shortcomings of the conventional technology, this invention was developed to create a seat lift device that has a backward tilting function in addition to the lifting and lowering operation in order to make fine adjustments according to the preferences of the driver and other seat occupants. The purpose is to provide

[Means for solving problems]

That is, the seat lift device of this invention has a front threaded portion with threads in opposite directions on the distal end side and a rear threaded portion with threads cut on the proximal end side, and is rotatably mounted on the floor side. The main slide shaft has a main slide shaft and an upper threaded portion with threads in opposite directions, and is rotatably attached to the front end of the seat cushion frame so that the seat cushion frame can be rotated by rotational movement. an auxiliary slide shaft, a pair of front slide bodies that slide while being screwed onto the front threaded portion of the main slide shaft, and a pair of first arms whose proximal ends are rotatably supported by the front slide bodies, respectively. and a pair of upper slide bodies that slide while being screwed onto the upper threaded portion of the sub-slide shaft, and a pair of second arms whose base ends are rotatably supported by the upper slide bodies, respectively. A front lift mechanism in which the tips of the first and second arms are rotatably connected to each other; a rear slide body that slides while being screwed onto the rear threaded portion of the main slide shaft; a rear lift mechanism having a rear arm having a base end rotatably attached and a distal end rotatably attached to the seat cushion frame base side;
It is provided with rotation/operation means for independently and separately rotating the main slide shaft and the sub slide shaft.

[Effect]

In the seat lift device of this invention, the front slide body of the front threaded portion and the rear slide body of the rear threaded portion move back and forth by rotational operation on the main slide shaft side, thereby moving the first arm and the rear arm. The seat can be raised or lowered by standing up or leaning down.

In addition, the upper slide body moves back and forth by the rotation operation on the sub slide shaft side, which causes the second
The arm can be raised and tilted to tilt the seat backwards.

In this way, the seat position relative to the floor side can be finely adjusted according to the preferences of the seat occupant.

〔Example〕

An embodiment of this invention will be described below with reference to the accompanying drawings.

Figures 1 and 2 show a seat lift device according to this invention, and this seat lift device consists of a main slide shaft 1 rotatably attached to the floor (not shown) and a seat 2 at the tip. It is composed of a sub-slide shaft 3 rotatably attached to the side, a front lift mechanism 4, a rear lift mechanism 5, and a rotation operation means 6. Incidentally, reference numerals 7 and 8 in the figure denote crank mechanisms that respectively support the leading end and the base end of the seat 2 so as to be able to rise and fall from the lower side of both side walls;
Numeral 9 is a connecting mechanism composed of three connecting rods in order to operate both crank mechanisms 7 on the front end side of the seat in conjunction with the front lift mechanism 4, and 10 is a connecting mechanism composed of three connecting rods that operates both crank mechanisms 7 on the front end side of the seat in conjunction with the front lift mechanism 4. This is a connecting rod for operating the mechanism 8.

The main slide shaft 1 has a front threaded portion 1 on the tip side.
1 and a rear threaded portion 12 on the rear end side, and is rotatably attached to a support portion 15 of an upper rail 14b that is slidable with respect to a lower rail 14a fixed to the floor surface 13 side. The front threaded portion 11 of this embodiment has right-handed threads 11a and left-handed threads 11b cut on both sides of the central portion so as to be opposite to each other, and the rear threaded portion 12 has left-handed threads cut on both sides. There is. It should be noted that it is of course possible to cut the threads of the front threaded part and the rear threaded part in the opposite directions from those of this example, but
The threading direction of the rear threaded portion is determined by the mounting direction of the arm on the rear lift mechanism 5 side, which will be described later. In addition, in this example,
As explained above, the main slide shaft 1 is attached to the upper rail 14b side, which allows the seat lift device itself to slide horizontally along the floor surface 13. It is also possible to rotatably mount it directly on the

The sub-slide shaft 3 is for raising and lowering the front end of the seat, and has upper threaded portions 16 that are threaded in opposite directions. and,
The upper threaded portion 16 of this embodiment is similar to the front threaded portion 11
Similarly, there are 1 right-hand screws on both sides of the center.
6a and left-hand thread 16b are cut.

The front lift mechanism 4 includes a right-hand thread 11a and a left-hand thread 1 that constitute the front threaded portion 11 of the main slide shaft 1.
1b and slides along the axial direction of the main slide shaft 1, a first arm 18 rotatably attached to these front slide bodies 17, and a first arm 18 of the sub slide shaft 3. A right-hand screw 16a and a left-hand screw 16 that constitute the upper screw portion 16
upper slide bodies 19a and 19b that are screwed into b and slide along the axial direction of the sub slide shaft 3;
The first arm 1 is rotatably attached to these upper slide bodies 19a and 19b.
8 and a rotatable second arm 20. In addition, for the rotational movement of the seat cushion frame 2 side, it is of course possible to configure, for example, the distal end side 20a of the second arm 20 to be longer than the proximal end side 20b. It is.

The rear lift mechanism 5 raises and lowers the leading end of the seat 2 in accordance with the lifting and lowering of the leading end of the sheet 2 due to the rotation of the main slide shaft 1, and also lifts and lowers the leading end of the seat 2 in response to the rotation of the leading end of the auxiliary slide shaft 1. It serves as a pivot point for the rotation. The rear lift mechanism 5 includes a rear slide body 21 that is screwed into the screw of the rear threaded portion 12 and slides along the axial direction of the main slide shaft 1, and a rear slide body 21 formed on the rear slide body 21 and the seat cushion frame side. A rotatable rear arm 2 is attached to these rear slide body 21 and support body 22 in order to connect the support body 22 which has been
It is composed of 4.

The rotation operation mechanism 6 is for rotating the main slide shaft 1 and the sub slide shaft 3 independently and separately. It consists of fixed operation knobs 6a and 6b. Note that this rotation operation means 6
However, there is no particular limitation on this, and it is of course possible to automate it using, for example, a motor.

Next, Fig. 3 a and b and Fig. 4 a and This will be explained with reference to b.

When raising and lowering: When the main slide shaft 1 is rotated in a predetermined direction using the operation knob 6a, the front slide bodies 17 slide toward each other from the state a in FIG. 3, and the rear slide body 21 moves forward toward the tip side. Due to the sliding, the seat 2 rises as shown in FIG. 3b. Moreover, when the seat 2 is to be lowered, the operation knob 6 may be rotated in the opposite direction.

When tilting: When the sub slide shaft 3 is rotated in a predetermined direction using the operation knob 6b, it changes from the state shown in FIG.
As shown in Figure b, the upper slide bodies 19a and 19
b come closer to the center side of each other, and the rear lift mechanism 5
The seat 2 rotates using the side as a rotation fulcrum. That is,
Thereafter, the arm 24 and the support body 22 rotate clockwise around the joint between the rear slide body 21 and the rear arm 24, and as a result, the arm 20a attached to the upper slide body 19a of the second arm 20 rises. The angle θ ₁ becomes larger than the rising angle θ ₂ of the arm 20b. In this way sheet 2
can be tilted backwards.

〔effect〕

As explained above, according to the seat lift device according to this invention, by rotating the main slide shaft with the rotation operation means, the seat can be raised and lowered in the vertical direction with respect to the floor surface side, and The seat can be tilted toward the rear by rotating the auxiliary slide shaft using a rotary operation means, and this allows the seat to be adjusted to suit the various physiques and preferences of the seat occupants. The position can be adjusted, making it extremely practical.

Further, according to the seat lift device according to this invention, it has two types of functions, namely, a parallel lifter and a front lifter, with a relatively simple structure, so it can be manufactured at a low cost, and the structure is simple. Because it is simple, there are fewer failures.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing the seat lift device according to this invention, Fig. 2 is a side view of the seat lift device shown in Fig. 1, and Figs. Explanatory diagram, Figure 4a
and b are explanatory views for explaining the backward tilting operation of the seat, respectively, and FIG. 5 is a side view showing a conventional seat lift device. DESCRIPTION OF SYMBOLS 1...Main slide shaft, 3...Sub-slide shaft, 4...Front lift mechanism, 5...Rear lift mechanism, 6...Rotation operation means, 11...Front screw portion,
12...Rear threaded part, 16...Top threaded part, 17...
Front slide body, 18...first arm, 19a, 1
9b...Upper slide body, 20...Second arm, 2
1... Rear slide body, 24... Rear arm.

Claims (1)

[Claims for Utility Model Registration] It has a front threaded part with opposite threads on the distal side and a rear threaded part with threads on the proximal side,
The seat cushion frame has a main slide shaft rotatably attached to the floor side and an upper threaded portion with threads in opposite directions, and the seat cushion frame is rotated by rotational movement. A sub-slide shaft rotatably attached to the distal end side, a pair of front slide bodies that slide while being screwed into the front threaded portion of the main slide shaft, and a proximal end of each of these front slide bodies is rotatably attached. A pair of pivotally supported first arms, a pair of upper slide bodies that slide while being screwed onto the upper threaded portion of the sub-slide shaft, and base ends of each of these upper slide bodies are rotatably supported. a front lift mechanism, which has a pair of second arms, in which the tips of the first and second arms are rotatably connected to each other, and a rear lift mechanism that slides while being screwed into the rear threaded portion of the main slide shaft a rear lift mechanism having a slide body, a rear arm having a base end rotatably attached to the rear slide body and a rear arm having a distal end rotatably attached to the seat cushion frame base side; the main slide shaft; A seat lift device comprising a rotation operation means for independently and separately rotating a sub slide shaft.