JP2012218481A - Seat back support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat back support device which provides good seating feeling, regarding the seat back support device which supports the back of a seat occupant by regulating a warp of a seat back of a seat.SOLUTION: The seat back support device includes: a support plate 3, which is provided rotatably in the vertical direction on the upper part of a seat back frame 1 and extended up to pelvis of the seat occupant; a warping member 7, which is provided at an opposite surface side to a surface side of the support plate 3 facing the seat occupant and deformable in the direction of pressing the lumber vertebrae, a part of the back of the seat occupant; and a drive means that can deform the warping member 7 in the direction of pressing the lumber vertebrae of the seat occupant.

Description

  The present invention relates to a seat back support device that supports the back of a seated person by adjusting the curvature of the seat back of the seat.

  An example of a seat back support device is a device called a lumbar support. The lumbar support device supports the correct posture of the seated person by pressing the lumbar spine that is a part of the back surface of the seated person (see, for example, Patent Document 1).

Japanese Patent No. 3556217

  However, since the conventional lumbar support device locally presses the seated person's lumbar spine, a gap is generated between the seat back surface and the back of the portion above the seated person's lumbar spine. Therefore, there is a problem that the seating feeling is bad.

  An object of the present invention is to provide a seat back support device having a good seating feeling.

  The invention according to claim 1 is provided on the upper part of the seat back frame member so as to be rotatable in the vertical direction, and extends to the pelvis of the seated person, and the surface side of the support plate facing the seated person A warping member that is disposed on the opposite surface side and is deformable in a direction in which a part of the back surface of the seated person is pressed, and a driving unit that deforms the warping member in a direction in which a part of the back surface of the seated person is pressed. And a seat back support device.

  According to a second aspect of the present invention, the driving means includes a nut member provided on one of the seat back frame side member and the warp member, the seat back frame side member, and the warp member. A guide that is provided on the other side and guides the nut member so as to be linearly movable; a screw rod that is provided on the other of the seat back frame side member and the warping member and into which the nut member is screwed; and the screw The seat back support device according to claim 1, comprising: a drive unit that rotationally drives the rod.

  According to a third aspect of the present invention, the warping member is provided such that an upper portion thereof is rotatably provided in the seat back frame side member in the vertical direction, and the nut member is provided in the lower portion of the warping member so as to be rotatable in the vertical direction. The seat back support device according to claim 2, wherein the seat back support device is provided.

  In the present specification, the “seat back frame member” includes the seat back frame itself and a member that supports the back of the seated person as well as the seat back frame.

  According to the first to third aspects of the present invention, the support plate is provided on the upper portion of the seat back frame member so as to be rotatable in the vertical direction and extends to the pelvis of the seated person, and the seating of the support plate A warping member disposed on a surface opposite to the surface facing the person and deformable in a direction of pressing a part of the back surface of the seated person, and pressing the warping member a part of the back surface of the seated person Driving means for deforming in the direction, and when the warping member driven by the driving means is deformed in a direction to press a part of the back surface of the seated person, the support extends from the upper part of the frame to the seated person's pelvis. Since the plate rotates about the upper part of the frame in the upward direction, that is, toward the back of the seated person, there is no gap between the seat back surface and the back of the part above the part pressed by the warping member. . Therefore, a feeling of sitting is good.

  According to the second and third aspects of the invention, the driving means includes a nut member provided on one of the seat back frame side member and the warp member, the seat back frame side member, and the warp. A guide that is provided on the other of the members and guides the nut member so as to be linearly movable, a screw rod that is provided on the other of the member on the seat back frame side and the warping member, and the nut member is screwed with And a drive unit that rotationally drives the screw rod, the installation space of the drive means may be narrow, and the degree of freedom of the attachment location is high.

  According to the invention which concerns on Claim 3, when the curvature member deform | transforms, the said curvature member is provided in the upper part of the curvature member because the upper part was provided in the member by the side of a seat back frame so that rotation was possible up and down. No large bending stress is generated.

  Further, since the nut member is provided at the lower portion of the warping member so as to be rotatable in the vertical direction, when the warping member is deformed, a large bending stress is not generated at the lower portion of the warping member.

It is the perspective view which looked at the seat back support device of this embodiment from the back side of a sheet. It is the perspective view which removed the support plate and the air blower from FIG. FIG. 3 is a view in the direction of arrow III in FIG. 2. It is a perspective view which shows the state which the drive means act | operated from the state of FIG.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of the seat back support device of the present embodiment as seen from the back side of the seat, FIG. 2 is a perspective view of the support plate and the air blower removed from FIG. 1, and FIG. 3 is a view in the direction of arrow III in FIG. FIG. 4 is a perspective view showing a state where the driving means is operated from the state of FIG.

  First, the configuration of the present embodiment will be described with reference to FIGS. In these figures, the seat back frame 1 is formed with an upper horizontal portion 1a extending in the horizontal direction at a portion facing the shoulder portion of the seated person.

  A hinge portion 3a that engages with the upper horizontal portion 1a of the seat back frame 1 and rotatably supports the support plate 3 in the vertical direction is formed on the upper portion of the support plate 3 that extends from the shoulder portion of the seated person to the pelvis. Has been.

  A warping member support bar 5 extending in the horizontal direction is disposed at a portion of the seat back frame 1 facing the portion between the shoulder portion of the seated person and the lumbar spine, and is attached to the seat back frame 1 by a technique such as welding. It has been. On the side of the support plate 3 opposite to the side facing the seated person, there is a warping member 7 that faces the seated person's lumbar portion and can be deformed in a direction to press the lumbar spine that is part of the back surface of the seated person. Be placed. A hinge 9 that engages with the warp member support bar 5 and supports the warp member 7 so as to be rotatable in the vertical direction is provided on the upper portion of the warp member 7.

  A lower horizontal portion 1 b is formed at the lower portion of the seat back frame 1. A guide holding bar 11 extending in the horizontal direction is disposed above the lower horizontal portion 1b, and is attached to the seat back frame 1 by a technique such as welding.

  Between the guide holding bar 11 and the lower horizontal portion 1b of the seat back frame 1, a guide base 13 extending in the vertical direction is disposed. The upper portion of the guide base 13 is fixed to the guide holding bar 11 by a method such as caulking. The lower part of the guide base 13 is fixed to the lower horizontal part 1b of the seat back frame 1 by a technique such as welding.

  The nut member 15 is engaged with both sides of the guide base 13 so as to be movable in the vertical direction in a state where rotation is prohibited.

  A screw rod 17 extending in the vertical direction is arranged on the guide base 13. A large-diameter portion 17a and a large-diameter portion 17b are formed on the upper and lower portions of the screw rod 17. A screw having a screw engraved on the peripheral surface between the large-diameter portion 17a and the large-diameter portion 17b. A rod body 17c is formed. The nut member 15 is screwed into the threaded rod main body portion 17c. Further, the screw rod 17 is rotationally driven by a motor (drive unit) 19 provided on the seat back frame 1.

  As shown in FIG. 3, the nut member 15 is attached to the lower part of the warping member 7 via a hinge 21 whose rotation axis is in the horizontal direction. A method for attaching the nut member 15 and the hinge 21 and a method for attaching the hinge 21 and the warping member 17 include, for example, fastening with bolts.

  Further, in the present embodiment, there is provided a seat blower 35 comprising a compressor 31 provided at the lower part of the seat back frame 1 and a duct 33 for allowing the wind generated by the compressor 31 to pass from the back side to the front side of the seat back. Is provided.

  Next, the operation of the above configuration will be described with reference to FIGS.

  In the state shown in FIG. 2, the nut member 15 is positioned below the guide base 13, and the warping member 7 is not deformed in the direction of pressing the seated person's lumbar spine.

  Here, when the motor 19 is rotationally driven in one direction, the screw rod 17 rotates in one direction, and the nut member 15 whose rotation is prohibited rises along the guide base 13. As the nut member 15 rises, the warping member 7 is elastically deformed and presses the lumbar spine of the seated person as shown in FIG.

  Therefore, the screw rod 17, the motor 19 that rotationally drives the screw rod 17, the nut member 15 that is attached to the lower portion of the warping member 7 and screwed to the screw rod 17, and the guide base that guides the nut member 15 in the vertical direction. 13, drive means for deforming the warping member 7 in the direction of pressing the lumbar spine of the seated person is configured.

  When the motor 19 is driven to rotate in the other direction from the state in which the warping member 7 shown in FIG. 4 is deformed and presses the lumbar spine of the seated person, the screw rod 17 rotates in the other direction and rotation is prohibited. The nut member 15 is lowered along the guide base 13. When the nut member 15 is lowered, the warping member 7 is elastically restored as shown in FIG. 2, and the state of pressing the seated person's lumbar vertebra is released.

  The nut member 15 is movable until it contacts the large diameter portion 17a and the large diameter portion 17b of the screw rod 17.

  According to the above configuration, the following effects can be obtained.

 (1) When the warping member 7 driven by the driving means is deformed in the direction of pressing the seated person's lumbar spine, the support plate 3 extending from the seated person's shoulder to the pelvis is centered on the seated person's shoulder side. Since the entire seat back surface rotates in the upward direction, that is, in the back direction of the seated person, no gap is generated between the seat back surface and the back of the portion above the seated person's lumbar spine. Therefore, a feeling of sitting is good.

 (2) Since the upper part of the warping member 7 is provided on the seat back frame 1 so as to be rotatable in the vertical direction, no large bending stress is generated on the upper part of the warping member 7 when the warping member 7 is deformed.

 (3) The driving means includes a screw rod 17, a motor 19 that rotationally drives the screw rod 17, a nut member 15 that is attached to the lower portion of the warp member 7, and is screwed to the screw rod 17, and the nut member 15 in the vertical direction. With the guide base 13 that guides to the mounting space, the mounting space for the driving means may be narrow, and the degree of freedom of the mounting location is also increased. Therefore, installation of the sheet blowing device 35 is facilitated.

 (4) Since the screw rod 17 is provided on the seat back frame 1 and the nut member 15 is provided below the warp member 7 so as to be rotatable in the vertical direction, the warp member 7 is deformed when the warp member 7 is deformed. A large bending stress does not occur in the lower part.

  The present invention is not limited to the above embodiment. In the above embodiment, the screw rod 17, the motor 19, and the guide base 13 are provided on the seat back frame 1 side, and the nut member 15 is provided on the warp member 7 side. Conversely, the screw rod 17, the motor 19, and the guide base are provided. 13 may be provided on the warp member 17 side, and the nut member 15 may be provided on the seat back frame 1 side.

  Further, the warping member of the above embodiment presses the lumbar vertebra as a part of the back surface of the seated person, but may press other parts such as the thoracic vertebra and the pelvis.

1 Seat back frame 3 Support plate 7 Warpage member

Claims (3)

A support plate provided on the upper portion of the seat back frame member so as to be rotatable in the vertical direction and extending to the pelvis of the seated person;
A warping member disposed on a surface opposite to the surface facing the seated person of the support plate, and deformable in a direction of pressing a part of the back surface of the seated person;
Driving means for deforming the warping member in a direction of pressing a part of the back surface of the seated person;
A seat back support device comprising: The driving means includes
A member on the seat back frame side, a nut member provided on one of the warping members,
A guide that is provided on the other of the seatback frame side member and the warping member and guides the nut member so as to be linearly movable;
A screw rod provided on the other of the seat back frame side and the warping member, and screwed with the nut member;
A drive unit for rotationally driving the screw rod;
The seat back support device according to claim 1, comprising: The warping member is provided such that the upper part thereof is rotatable in the vertical direction on the seat back frame side member,
The seat back support device according to claim 2, wherein the nut member is provided below the warp member so as to be rotatable in the vertical direction.

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