JPH063729U - Seat with vertical mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a seat with a vertical mechanism capable of vertically adjusting the position of the front side of a seat cushion. [Structure] A rear portion of a seat cushion 10 constituting a seat is vertically rotatably assembled to a floor side, and a front portion is positionally adjusted by operating a vertical mechanism. This vertical mechanism includes a bell crank 32 rotatably assembled on the floor side, a screw 20 having one end rotatably assembled on the floor side in the vertical direction, and one swing of the bell crank 32. The nut 25 that is rotatably connected to the movable end 32b and is screwed to the screw 20, the other swing end 32a of the bell crank 32, and the seat cushion 1
0 is composed of a link 33 whose both ends are rotatably connected, and a motor 22 for rotating the screw 20.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seat with a vertical mechanism, that is, a seat in which a seat cushion constituting the seat is adjustable in vertical position on the front side.

[0002]

[Prior art]

 In this type of seat, the rear part of the seat cushion that makes up the seat is installed on the floor side so that it can rotate in the vertical direction, and the front part of this seat cushion can rotate in the vertical direction with the rear part as the fulcrum. It is assembled on the floor side, and the vertical position of the front side of the seat cushion can be adjusted by operating the vertical mechanism. As an example, in the seat with vertical mechanism shown in FIG. 7, the rear portion of the seat cushion 50 is assembled to the movable side rail 51 of the seat track arranged on the floor so as to be rotatable in the vertical direction. The rear part is configured to rotate in the vertical direction with its rear part as a rotation fulcrum 53, and its vertical mechanism is attached to a link a61 connected to the front of the seat cushion 50 and a movable rail 51 on the floor side. A link b62 having one end attached to a nut 67 that is screwed to a vertical screw 66 that is rotated by a vertical motor 65 and that moves in the front-rear direction, and the link a61 and the other end of the link b62 are connected to form a center. And a bell-shaped bell crank 63, which is assembled to the movable side rail 51 so as to be rotatable in the vertical direction. Cage, bell crank 63 when the nut 67 is moved toward the vertical for motors 65 is rotated so that the link b62 side is lowered, the front side of the Shitoku cushion 50 is pushed upward through the thus link a61 link a61 side up. On the contrary, when the nut 67 moves in a direction away from the vertical motor 65, the link b62 side of the bell crank 63 goes up, the link a61 side goes down, and the seat cushion goes down.

In FIG. 7, the front and rear positions of the seat are adjusted by sliding a movable side rail 51 having a fixed seat cushion 50 on a fixed side rail 52 fixed to the floor. The motor 65 is attached to the movable side rail 51 using a motor attachment bracket 54.

[0004]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional one, two links a61 and links b62 and one bell crank 63 are used for the vertical mechanism that pushes up the front portion of the seat cushion. The slight strain at the point becomes a large strain as a whole, and the seat cushion 50 easily wobbles. In addition, since the vertical mechanism is complicated due to the large number of parts, and a certain size of the link b62 must be used in order to secure a sufficient vertical stroke for lifting the seat cushion 50, the mechanical arrangement is not required. A wide space is needed.

Therefore, an object of the present invention is to provide a seat with a vertical mechanism that has a simple structure and is capable of adjusting the vertical position of the front side of the seat cushion.

[0006]

[Means for Solving the Problems]

 In the seat with vertical mechanism of the present invention, the rear part of the seat cushion that constitutes the seat is vertically rotatably assembled on the floor side, and the front part of the seat cushion can be moved vertically with the rear part as the fulcrum. In a seat with a vertical mechanism that is installed on the floor side and adjusts the vertical position of the front part of the seat cushion by operating the vertical mechanism, the vertical mechanism can be turned up and down on the floor side. To the floor, a screw whose one end is vertically rotatably assembled to the floor, and one swing end of the bell crank is rotatably connected and screwed to the screw. The nut and the other swing end of the bell crank and the seat cushion are rotatably connected at both ends. Wherein the link, that it has a configuration and a driving means for rotating said screw.

The screw is rotatably attached to a joint having a circular cross section in a direction in which the screw extends, and a vertical direction of the screw is fixed by a clamp structure in which this joint is fixed to the floor side. It is characterized in that it is slidably fixed during rotation. Further, the driving means is fixed to the joint.

[0008]

[Operation and effect of the device]

 In the seat with a vertical mechanism of the present invention, the screw can be rotated in the vertical direction, so that the hinge point that is involved in the wobbling of the seat cushion is at the pivotal joint between the two members, the bell crank and the link, and the screw. Yes, the number of parts is smaller than that of a conventional seat with a vertical mechanism that uses two links, a bell crank, and a vertical screw, and therefore the mechanism is simple because the number of parts is small. Also, the vertical mechanism of the present invention may have a smaller space for arranging the mechanism than the conventional one.

Further, since the bell crank is rotatably assembled on the floor side, the strains are distributed on the link side and the screw side. Since the strain on the screw side is transmitted to the floor, the wobbling of the seat cushion is absorbed, while the hinge point at which the strain on the link side, which causes most of the wobbling of the seat cushion, is the hinge points at both ends of the link, Since there are few hinge points, the occurrence of wobble can be kept low.

[0010]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially exploded perspective view of a seat with a vertical mechanism according to the present invention, in which a seat cushion frame 10 constituting the seat constitutes a pair of left and right seat tracks arranged on the floor with its rear part as a pivot. It is assembled to a pair of left and right movable side rails 11, and the movable side rail 11 slides on a pair of left and right fixed side rails 12 fixed to the floor so that the seat can be positionally adjusted in the front-rear direction. Has been done. On the movable rail 11 on the right side, there are four hold pieces 27 having fitting recesses for holding the spherical joint balls 21 to which the screw 20 is attached so that the screw 20 can rotate up and down. A clamp structure including a holding plate 28 is fixed. That is, the rotating mechanism of the screw 20 is composed of this clamp structure and the joint ball 21.

FIG. 2 is a vertical cross-sectional view of the joint ball 21 portion in FIG. 1. The inside of the joint ball 21 slidably held by the clamp structure is hollow, and the screw 20 is inserted inside. The shaft 24 is inserted. Further, a motor 22 as a driving means capable of rotating in the forward and reverse directions is attached to a portion outside the joint ball 24 and substantially orthogonal to the screw 20. The output shaft 23 of the motor 22 is inserted into the joint ball 21 to form a worm and worm gear connection with the input shaft 24 of the screw 20.

A nut 25 is screwed onto the screw 20 so as to be able to move forward and backward, and the nut 25 moves on the screw 20 by the rotation of the screw 20 and is stopped by a stopper 26 so as not to come off from the screw 20. A drive shaft 30 extending in the lateral direction is rotatably provided in the front portion of the seat of the movable side rails 11 on both the left and right sides in a shaft receiving hole 11 a, and is fixed by an E ring 31. A "V" shaped bell crank 32 is fixed to the drive shaft 30 at its bent portion to be integrally formed. The first swing end 32a of the bell crank 32 is rotatably connected to the other end of the link 33 pivotally attached to the bracket 13 fixed to the cushion frame 10 of the seat, and the second swing end 32b is connected to the second swing end 32b. It is rotatably connected to a nut 25 screwed onto the screw 20.

A bracket 13 is fixed to the left movable rail 11, and an arm 34 corresponding to the first swing end 32a of the bell crank 32 is fixed to the left end portion of the drive shaft 30. Each end of the link 35 is rotatably connected to each end of the bracket 13 and the arm 34. As a result, the seat cushion frame 10 is supported on the left and right seat tracks by the drive shaft 30, the bell crank 32, the arm 34 and the links 33, 35.

FIGS. 4, 5, and 6 are side views for explaining the operation of the seat with a vertical mechanism configured as described above. The seat cushion in the position of FIG. When adjusting to the position, the screw 20 is rotated by the rotation of the motor 22, the nut 25 is moved toward the tip of the screw 20, and the bell crank 32 is rotated to lift the link 33 and raise the seat cushion. Push up.

On the other hand, when lowering the seat cushion to the position shown in FIG. 6, the rotation of the motor 22 is reversed and the screw 20 is rotated in the reverse direction, and the nut 25 is moved in the direction of the joint ball 21 to move the bell crank 32. Is rotated to lower the link 33 downward, and the seat cushion is rotated downward. When the seat cushion is rotated upward or downward in this manner, the screw 20 is rotated vertically with the joint ball 21 as a fulcrum as the bell crank 32 is rotated.

In the seat with vertical mechanism configured as described above, since the screw 20 is held rotatably in the vertical direction by the clamp structure, the hinge point involved in the wobble of the seat cushion is the bell crank 32. The number of links is smaller than that of a conventional seat with a vertical mechanism that uses two members of a link 33 and a screw 33 and a screw 20 and has two links, a bell crank and a vertical screw. Since the number of parts is small, the mechanism is simple. Further, since the bell crank 32 is fixedly integrated with the drive shaft 30 that is rotatably pivoted on the floor side, the strain can be dispersed to the link side and the screw side, and the strain on the screw side is transmitted to the floor. Wobble of the seat cushion is absorbed. On the other hand, the hinge points that cause the distortion on the link side due to most of the wobbling of the seat cushion are only the pivot joints at both ends of the link, and since there are few hinge points, the occurrence of wobbling can be suppressed to a low level.

FIG. 3 is a diagram showing another embodiment of the clamp structure of the joint ball 21 shown in FIGS. 1 and 2. This clamp structure is attached to the movable side rail 11, and the joint ball 21 of the screw is attached. The joint ball 21 is sandwiched between four hold plates 40 having the shape described above, and the flange portion 40 a of the hold plate 40 can be joined and fixed by the caulking pins 41.

Further, although the joint is formed as a spherical joint ball in the above-mentioned embodiment, the screw is formed in the vertical direction when the screw is formed in a cylindrical shape having a circular cross section in the extending direction of the screw and the joint is held by the clamp. It may be configured to be rotatable. At this time, the inside of the cylinder may be hollow so that the worm and worm gear mechanism for the input shaft of the screw and the output shaft of the motor of the driving means and the worm gear mechanism may be incorporated as in the above embodiment. Further, although the bell crank 32 is fixed to the drive shaft 30 in the above embodiment, the bell crank 32 may be directly assembled to the movable side rail 11.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view of a seat with a vertical mechanism according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a joint ball portion of FIG.

FIG. 3 is a longitudinal sectional view corresponding to FIG. 2 of another embodiment of the present invention.

FIG. 4 is a side view for explaining the operation of the seat with a vertical mechanism shown in FIG.

5 is a side view of the seat with vertical mechanism when the front portion of the seat cushion in the position shown in FIG. 4 is raised.

FIG. 6 is a side view of the seat with a vertical mechanism when the front portion of the seat cushion at the position shown in FIG. 4 is lowered.

FIG. 7 is a side view of a conventional seat with a vertical mechanism.

[Explanation of symbols]

10 ... Cushion frame, 11 ... Movable side rail, 13
... bracket, 20 ... screw, 21 ... joint ball, 22 ... motor, 23 ... motor output shaft, 24
... Screw input shaft, 25 ... Nut, 26 ... Stopper, 27 ... Hold piece, 28 ... Holding plate, 30
... drive shaft, 32 ... bell crank, 33 ... link,
40 ... Hold plate, 50 ... Seat cushion, 5
1 ... Movable side rail, 61 ... Link a, 62 ... Link b,
63 ... Bell crank, 65 ... Vertical motor, 6
6 ... screw, 67 ... nut.

Claims (3)

[Scope of utility model registration request] 1. A rear portion of a seat cushion constituting a seat is vertically rotatably mounted on a floor side, and a front portion of the seat cushion is vertically movably mounted on a floor side with a rear portion thereof as a fulcrum. In a seat with a vertical mechanism that adjusts the vertical position of the front portion of the seat cushion by operating the vertical mechanism,
The vertical mechanism is a bell crank assembled on the floor side so as to be vertically rotatable, a screw whose one end is vertically rotatable on the floor side, and one swing of the bell crank. A nut whose moving end is rotatably connected and screwed to the screw, and a link whose both ends are rotatably connected to the other swing end of the bell crank and the seat cushion, respectively. A seat with a vertical mechanism, comprising a drive means for rotating the screw. 2. The screw is rotatably attached to a joint having a circular cross section in a direction in which the screw extends, and the joint is fixed to the floor side by a clamp structure to rotate the screw in a vertical direction. The seat with a vertical mechanism according to claim 1, wherein the seat is slidably fixed during movement. 3. The seat with vertical mechanism according to claim 1, wherein the drive means is fixed to the joint.