JPH065554U - Seat back side support device - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent a side support device incorporated in a seat back of an automobile seat from feeling a foreign object when seated. [Structure] A lead screw (2) for rotating the left and right side frames (10A) (10B) is engaged with an output shaft of a motor (M) toward the front, and the lead screw (2) is attached to the lead screw (2). It is moved back and forth by the rotation of 2) and the side frame (10
A) A nut (4) with a pin for rotating (10B) is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a side support device for a seat back of a vehicle seat.

[0002]

[Prior art]

 A conventional side support device has an electric motor, which constitutes the side support device, and a screw shaft, a cam, and the like for transmitting the driving force of the electric motor, which are built in the seat back. The screw shaft, the cam, and the like rotate to the left and right of the frame. It is arranged inside the freely mounted side frame. That is, for example, the screw shaft is arranged inward with respect to the frame, and is screwed to the screw shaft to connect the movable piece that moves in the left-right direction to one side frame. On the other hand, the cushion cushion made of a seat back, which covers the side support device, has a thinner wall thickness than the cushion body of the seat cushion.

[0003]

[Problems to be solved by the device]

 Therefore, since the cushion body of the seat back is thin and the component parts of the side support device are arranged so as to project inward of the frame, the screw shaft that is a component part of the side support device when seated. There was a problem that the transmission member such as felt like a foreign object. Therefore, the present invention aims to eliminate such defects of the conventional products.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention engages a lead screw, which is arranged forward on the output shaft of a motor, with a nut with a pin that moves back and forth by the rotation of the lead screw. It is characterized in that a transmission member such as an arm A which is screwed, and which changes the forward and backward movement by the lead screw into a rotational movement and rotates the side frame is connected to the pin of the nut.

[0005]

[Action]

 Since the lead screw projects toward the side frame, which is the front side of the frame, the lead screw does not feel foreign matter.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In the drawing, (F) shows a frame of a seat back in which a pipe is bent into a substantially U shape, and a base plate (11) is welded to one side portion of the frame (F). An electric motor (M), which is rotated forward and backward by a changeover switch, is arranged so that its output shaft is parallel to one side of the frame (F) and is located inside the frame (F). There is. The above electric motor (M) is connected to the speed reducer (A) and the gearbox (B), and the lead screw (2) is meshed with the gearbox (B) toward the front of the seat back. .

A nut (4) with a pin (3) is meshed with the lead screw (2) as shown in FIG. 2, and the nut (4) is axially moved by the rotation of the lead screw (2). Move in a certain direction. Then, a pin (3) of the nut (4) is fixed to a rotating shaft (6) pivotally attached to a base plate (11) so that one end is welded and fixed to the arm A ( 5) (5) is engaged. Therefore, when the nut (5) is moved back and forth by the lead screw (2), the rotation shaft (6) is rotated via the arms A (5) (5).

The rotary shaft (6) is rotatably mounted along the front of one side of the frame (F), and the lower end of the rotary shaft (6) is shown in FIG. As described above, the base end of the arm B (7) is welded, and the tip of the arm B (7) is provided with a pin (71) to be inserted into the long hole (81) provided in the swing piece (8). is there. The swinging piece (8) is pivotally attached to a bracket (12) welded to the frame (F) so that the center in the longitudinal direction can be rocked by a pin (81), and one end of the bracket (12) is connected to one side. The lower end of the frame (10A) is fixed by welding. Also, one end of a connecting rod (9) is pivotally attached to the other end of the swinging piece (8) by a pin (92).

The upper ends of the one side frame (10A) and the other side frame (10B) are pivotally attached to brackets (13) and (13) as shown in FIG. The lower end of the other side frame (10B) is pivotally attached to the bracket (14) welded to the frame (F), and the base end of the movable piece (93) is welded. The other end of the connecting rod (9) is connected to the tip of the movable piece (93) by a pin (91).

Thus, when the lead screw (2) is rotated by the driving force of the motor (M) to move the nut (4) from the state shown in FIG. Arm (5) is rotated forward by a pin (3) integrated with (4), and a rotary shaft (6) integrated with this arm A (5) is rotated in the b direction. Therefore, the arm B (7) integral with the rotating shaft (6) rotates in the c direction as shown in FIG. 3, and the rotation of the arm B (7) causes one of the side frames (10A) to e. At the same time, the swing piece (8) is rotated by the pin (71) of the arm B (7) to pull the connecting rod (9) in the d direction, so that the other side frame (10B) is also moved. Rotate in the f direction. The inward (e, f direction) rotation of both side frames (10A) (10B) narrows the space between both side frames (10A) (10B) and holds the upper half of the seated person. In this state, as shown in FIG. 2, the nut (4) is located on the front end side of the lead screw (2) and the side frame (10A) is located inside.

Next, when the lead screw (2) is rotated by operating the changeover switch or the like from the state of FIG. 2, the side frames (10A) (10B) rotate in the opposite direction to the above, The state shown in FIG. 4 is reached, and the distance between the side frames (10A) and (10B) becomes wider. In addition, in FIG. 3, (b) and (b) show a side support portion of the seat back, and (a) shows a seating portion, respectively.

[0012]

[Effect of device]

 As described above, the present invention has a structure in which the lead screw is arranged forward on the output shaft of the motor, and the left and right side frames are rotated by the forward and backward movement of the nut with a pin screwed onto the lead screw. , The structural parts of the side support device are not built into the seat back seat. Therefore, the side support device does not feel a foreign substance, and the seat back seating property is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a side support device according to the present invention.

FIG. 2 is a partial cross-sectional view of an essential part of the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

[Explanation of symbols]

 F frame 2 lead screw 4 nut with pin 5 arm A 6 rotating shaft 7 arm B 8 swinging piece 9 connecting rod

Claims (1)

[Scope of utility model registration request] 1. A side frame is attached to each of the left and right sides of the frame so as to be rotatable in the left-right direction, the one side frame is rotated by a driving force of a motor via a transmission member, and the other side frame is connected to a connecting rod. In the side support device of the seat back that is rotated in the opposite direction through the, the output shaft of the motor fixed to the frame, the lead screw arranged toward the front meshes, the lead screw of the lead screw A nut with a pin that moves in the front-rear direction by rotation is screwed, one end of the arm A is engaged with the pin of the nut, and the other end of the arm A is rotatably attached to a bracket fixed to the frame. Fixed to the rotating shaft, and the end of the rotating shaft is welded to the base end of the arm B.
A swing piece pivotally attached to a bracket fixed to the frame is swingably connected to the tip of the arm B. One end of the swing piece is welded to one of the side frames and the other end is joined to the other end. A seat back side support device formed by connecting a connecting rod that connects to the other side frame.