WO2016199701A1

WO2016199701A1 - Vehicle seat

Info

Publication number: WO2016199701A1
Application number: PCT/JP2016/066680
Authority: WO
Inventors: 勤藤掛; 拓巳山川; 貴之野坂; 孝夫筒井
Original assignee: 株式会社タチエス
Priority date: 2015-06-08
Filing date: 2016-06-03
Publication date: 2016-12-15
Also published as: JP2017001470A; JP6557061B2

Abstract

Provided is a vehicle seat with which it is possible to provide a seat occupant with a feeling of support to not only the upper lumbar region but also the lower lumbar region when supporting the upper lumbar region through a lumbar support, and with which it is possible to have a reduction in cost. The vehicle seat comprises: a lumbar plate (14); a first link (15) having an upper rod (20) extending along an upper back surface of the lumbar plate (14), the first link (15) being rotated about a first axis (AX1) and moving the upper rod (20) in a seat-forward-backward direction; a second link (17) having a lower rod (22) extending along a lower back surface of the lumbar plate, the second link (17) being rotated about a second axis (AX2) and moving the lower rod (22) in the seat-forward-backward direction; and a drive unit (16) for rotating the first link (15) about the first axis (AX1); the second link (17) being driven with the rotation of the first link (15) which moves the upper rod (20) forward with respect to the seat, and the second link (17) moving the lower rod (22) forward with respect to the seat.

Description

Vehicle seat

The present invention relates to a vehicle seat.

A vehicle seat provided with a lumbar support that supports the waist of a seated person is known (see, for example, Patent Documents 1 and 2).

The vehicle seat described in Patent Document 1 includes a bendable mat that is provided inside a seat back and supports a waist of a seated person, a slider that can move vertically along the back of the mat, and a slider. And a drive unit to be moved. Along with the vertical movement of the slider, the bulging part of the mat pushed forward by the slider is also moved in the vertical direction, so that the waist support position by the lumbar support can be adjusted in the vertical direction.

The vehicle seat described in Patent Document 2 is provided inside the seat back, and a bendable plate that supports the waist of the seated person, and a first bar member that extends in the seat width direction along the upper back surface of the plate, And a second bar member extending in the sheet width direction along the lower back surface of the plate, a first actuator for swinging the first bar member, and a second actuator for swinging the second bar member. As the first bar member swings, the upper part of the plate is pushed forward and swells, and as the second bar member swings, the lower part of the plate is pushed forward and swells. The first bar member and the second bar member are independently swung by an actuator provided for each bar member, and the waist support position by the lumbar support can be changed to one or both of the upper part and the lower part. Yes.

Japan Special Table 2007-503892 Japanese Unexamined Patent Publication No. 2001-149178

In the vehicle seat described in Patent Document 1, when the slider is moved to the upper end in the movable range of the slider, the lower portion of the mat is retracted relative to the upper portion of the mat pushed forward of the seat. . In this case, there is a gap between the occupant's lower back and the seat back, and even if the occupant sits deeply on the seat, the slider does not exist at the lower part of the mat, so the lower lumbar support feeling is insufficient. There is a fear.

In the vehicle seat described in Patent Document 2, the first bar member and the second bar member are independently swung by an actuator provided for each bar member, and both the upper and lower portions of the plate are pushed forward of the seat. Therefore, not only the upper waist but also the lower waist can be supported. However, since a plurality of actuators are required, there is a concern about an increase in the cost of the vehicle seat.

The present invention has been made in view of the above-described circumstances, and can support not only the upper waist but also the lower waist when supporting the upper waist by the lumbar support to the seated person, and the cost can be reduced. An object of the present invention is to provide a simple vehicle seat.

A vehicle seat according to an aspect of the present invention is provided in a seat back and extends in a seat width direction along a flexible lumbar plate that supports a waist of a seated person and an upper back surface of the lumbar plate. A first link having an upper rod and rotated about a first axis extending in the seat width direction to move the upper rod in the seat front-rear direction, and extending in the seat width direction along the lower back surface of the lumbar plate A second link that rotates about a second axis extending in the seat width direction and moves the lower rod in the seat front-rear direction, and a drive unit that rotates the first link about the first axis The second link follows the rotation of the first link that moves the upper rod forward of the seat, and moves the lower rod forward of the seat.

ADVANTAGE OF THE INVENTION According to this invention, when supporting a waist upper part by a lumbar support, not only the waist upper part but a support feeling of a waist part can be given to a seated person, and the vehicle seat which can reduce cost can be provided. it can.

It is a perspective view of an example of a vehicular seat for explaining an embodiment of the present invention. It is a side view of the vehicle seat of FIG. It is a perspective view of the lumbar support of the vehicle seat of FIG. It is a perspective view which expands and shows the principal part of the lumbar support of FIG. It is a side view which shows operation | movement of the lumbar support of FIG. It is a perspective view which shows operation | movement of the lumbar support of FIG. It is a side view which shows operation | movement of the lumbar support of FIG. It is a perspective view which shows operation | movement of the lumbar support of FIG. It is a perspective view of other examples of a vehicular seat for explaining an embodiment of the present invention. It is a perspective view which expands and shows the principal part of the lumbar support of the vehicle seat of FIG. It is a side view of the 1st link and 2nd link of the lumbar support of FIG. It is a side view which shows operation | movement of the lumbar support of FIG. It is a side view which shows operation | movement of the lumbar support of FIG.

FIGS. 1 and 2 show an example of a vehicle seat for explaining an embodiment of the present invention, and FIGS. 3 and 4 show a lumbar support of the vehicle seat of FIGS.

The seat back of the vehicle seat 1 includes a pair of left and right side frames 10, an upper frame 11 that connects the pair of side frames 10, and a wire spring 18 that is spanned between the pair of side frames 10. The upper frame 11 is provided with a headrest mounting portion 12 (not shown). A cushion pad (not shown) is provided on the front side of the seat of the wire spring 18. The headrest attachment part 12 side is referred to as the upper side of the seat back.

The seat back of the vehicle seat 1 further includes a lumbar support 13. The lumbar support 13 supports the lumbar plate 14, the first link 15 having the upper rod 20 and the first lower rod 21 that support the lumbar plate 14, the drive unit 16 that drives the first link 15, and the lumbar plate 14. A second link 17 having a second lower rod 22 for rotating, and a coil spring 26 for biasing the second link 17.

The lumbar plate 14 is made of a thin resin plate having flexibility, and is swingably suspended from the wire spring 18 via a hook 19. The lumbar plate 14 is covered with a cushion pad disposed on the front side of the seat of the wire spring 18. Is called.

The upper rod 20 extends in the seat width direction along the upper back surface of the lumbar plate 14, and the first lower rod 21 and the second lower rod 22 extend in the seat width direction along the lower back surface of the lumbar plate 14. It is extended. The lumbar plate 14 supported from the back side of the seat by the upper rod 20, the first lower rod 21, and the second lower rod 22 supports the waist of the seated person via the cushion pad.

The first link 15 includes an upper rod 20 and a first lower rod 21 and a pair of left and right arm members 23. One arm member 23 holds one end of each of the upper rod 20 and the first lower rod 21, and the other arm member 23 holds the other end of each of the upper rod 20 and the first lower rod 21. is doing.

The arm members 23 are respectively supported by the side frames (base members) 10 so as to be rotatable around a first axis AX1 extending in the seat width direction between the upper rod 20, the first lower rod 21, and the second lower rod 22. ing.

The drive unit 16 includes an electric motor, and appropriately reduces the rotation of the electric motor and transmits it to one arm member 23 of the first link 15 to rotate the first link 15 around the first axis AX1 in both forward and reverse directions. .

The first link 15 forwardly rotated around the first axis AX1 by the drive unit 16 moves the upper rod 20 toward the front of the seat, and is disposed on the opposite side of the upper rod 20 across the first axis AX1. The first lower rod 21 is moved toward the back of the seat. The first link 15 reversely rotated around the first axis AX1 by the drive unit 16 moves the upper rod 20 toward the rear of the seat and moves the first lower rod 21 toward the front of the seat.

The second link 17 has a second lower rod 22 and a pair of left and right arm members 24. One arm member 24 holds one end of the second lower rod 22, and the other arm member 24 holds the other end of the second lower rod 22.

The arm members 24 are respectively supported by the side frames 10 so as to be rotatable around the second axis AX2 extending in the seat width direction between the first axis AX1 and the second lower rod 22.

The arm member 24 is provided with an engaging portion 25 that is pressed by the arm member 23 of the first link 15. The engaging portion 25 is provided on the opposite side of the second lower rod 22 with the second axis AX2 interposed therebetween, and is a portion of the arm member 23 below the first axis AX1 (on the first lower rod 21 side). It is arranged on the back side of the seat.

As the first link 15 moves the first lower rod 21 toward the back of the seat, the engaging portion 25 is pressed toward the back of the seat by the arm member 23 of the first link 15. As a result, the second link 17 rotates forward around the second axis AX2, and the second lower rod 22 disposed on the opposite side of the engaging portion 25 across the second axis AX2 is moved toward the front of the seat. The

The coil spring 26 has one end fixed to the engaging portion 25 and the other end fixed to the side frame 10. The coil spring 26 is extended by moving the engaging portion 25 to the rear of the seat, and the engaging portion 25 is moved to the front of the seat. Generates a pulling force that pulls back toward The second link 17 is biased by the coil spring 26 in the reverse rotation direction that moves the second lower rod 22 toward the rear of the seat.

5 to 8 show the operation of the lumbar support 13.

The positions of the first link 15 and the second link 17 in the state in which the lumbar plate 14 shown in FIGS. 5A and 7A is substantially flat are the initial positions of the first link 15 and the second link 17, respectively. And

When the first link 15 is rotated forward about the first axis AX1 by the drive unit 16, as shown in FIG. 5B, the upper rod 20 is moved toward the front of the seat and sandwiches the first axis AX1. The first lower rod 21 disposed on the side opposite to the upper rod 20 is moved toward the rear of the seat.

As the first link 15 rotates forward, the engaging portion 25 of the second link 17 is pressed toward the rear of the seat by the arm member 23 of the first link 15, and the second link 17 moves around the second axis AX <b> 2. It rotates forward. As the second link 17 rotates forward, the second lower rod 22 disposed on the opposite side of the engaging portion 25 with the second axis AX2 interposed therebetween is moved toward the front of the seat.

The upper rod 20 moved to the front of the seat presses the upper portion of the lumbar plate 14 and bulges the upper portion of the lumbar plate 14 toward the front of the seat. In addition, the second lower rod 22 moved to the front of the seat is in contact with the lower portion of the lumbar plate 14 and supports the lower portion of the lumbar plate 14.

Accordingly, in the seated person, the upper waist is supported by the upper portion of the lumbar plate 14 bulging forward of the seat, and the lower lumbar plate 14 supported by the second lower rod 22 also supports the lower waist. Is given.

Preferably, the amount of displacement of the second lower rod 22 forward of the seat with respect to the normal rotation of the first link 15 is equal to or less than the amount of displacement of the upper rod 20 forward of the seat. Thereby, the feeling of support for the lower back can be moderated. The amount of displacement of the second lower rod 22 forward of the seat relative to the amount of displacement of the upper rod 20 forward of the seat is, for example, the distance between the first axis AX1 and the engaging portion 25 and the distance between the second axis AX2 and the engaging portion 25. The distance can be set as appropriate according to the ratio of the distance and the ratio of the distance between the first axis AX1 and the upper rod 20 and the distance between the second axis AX2 and the second lower rod 22.

It should be noted that the positive rotation of the first link 15 rotated by the drive unit 16 over a predetermined angle is prevented by the stopper 27 provided in the second link 17 and the guide hole 28 provided in the side frame 10. The guide hole 28 extends along the locus of the stopper 27 in the forward rotation of the second link 17, and the stopper 27 moves through the guide hole 28 by the forward rotation of the second link 17, and the guide hole 28 extends. It abuts on one end in the current direction. The contact between the stopper 27 and one end of the guide hole 28 prevents the second link 17 from rotating forward over a predetermined angle, and also prevents the first link 15 from rotating forward over a predetermined angle.

On the other hand, when the first link 15 is reversely rotated around the first axis AX1 by the drive unit 16, as shown in FIG. 7B, the upper rod 20 is moved toward the rear of the seat, and the first axis AX1 is moved. The first lower rod 21 disposed on the opposite side of the upper rod 20 with the pinch in between is moved toward the front of the seat.

The first lower rod 21 moved to the front of the seat presses the lower portion of the lumbar plate 14 and bulges the lower portion of the lumbar plate 14 toward the front of the seat. Thereby, the lower back of the seated person is supported.

With the reverse rotation of the first link 15, the engaging portion 25 of the second link 17 is released from the pressing toward the rear of the seat by the arm member 23 of the first link 15, and the second link 17 is biased by the coil spring 26. Is rotated in reverse. Along with the reverse rotation of the second link 17, the stopper 27 of the second link 17 moves along the guide hole 28 of the side frame 10 and comes into contact with one end in the extending direction of the guide hole 28, so that the second link 17 is in the initial position. Retained. Thereby, rattling of the second link 17 is prevented.

Note that the reverse rotation of the first link 15 rotated by the drive unit 16 by a predetermined angle or more is prevented by the arm member 23 of the first link 15 coming into contact with the stopper 29 provided on the side frame 10.

In this way, the first link 15 is rotated by the drive unit 16 to move the upper rod 20 forward of the seat, and the second link 17 is driven by the rotation of the first link 15 to move the second lower rod 22 to the seat. By moving forward, when supporting the occupant's upper waist, not only the upper lumbar but also the lower lumbar support can be given to the occupant, and this can be performed by the single drive unit 16. The cost of the vehicle seat 1 can be reduced.

FIG. 9 shows another example of the vehicle seat for explaining the embodiment of the present invention, and FIGS. 10 and 11 show the lumbar support of the vehicle seat of FIG. In addition, the same code | symbol is attached | subjected to the element which is common in the vehicle seat 1 mentioned above, and description is abbreviate | omitted or simplified.

The lumbar support 113 includes a lumbar plate 114, a first link 115 having an upper rod 120 that supports the lumbar plate 114, a drive unit 116 that drives the first link 115, and a lower rod 121 that supports the lumbar plate 114. A second link 117 and a guide pole 118 are included.

The upper rod 120 extends in the seat width direction along the upper back surface of the lumbar plate 114, and the lower rod 121 extends in the seat width direction along the lower back surface of the lumbar plate 114.

The first link 115 has an upper rod 120 and a pair of left and right arm members 123. One arm member 123 holds one end of the upper rod 120, and the other arm member 123 holds the other end of the upper rod 120.

The arm members 123 are respectively supported by the side frames (base members) 10 so as to be rotatable around the first axis AX101 extending in the seat width direction above the upper rod 120.

The drive unit 116 includes an electric motor, and appropriately reduces the rotation of the electric motor and transmits it to one arm member 123 of the first link 115 to rotate the first link 115 in both forward and reverse directions around the first axis AX101. .

The first link 115 rotated forward about the first axis AX101 by the drive unit 116 moves the upper rod 120 toward the front of the seat. Further, the first link 115 reversely rotated around the first axis AX101 by the drive unit 116 moves the upper rod 120 toward the rear of the seat.

The second link 117 has a lower rod 121 and a pair of left and right arm members 124. One arm member 124 holds one end of the lower rod 121, and the other arm member 124 holds the other end of the lower rod 121.

The arm member 124 is coupled to the arm member 123 of the first link 115 between the first axis AX101 and the upper rod 120, and can rotate around the second axis AX102 extending in the seat width direction through the coupling portion. Are supported by arm members 123 respectively.

Along with the forward rotation of the first link 115 that moves the upper rod 120 toward the front of the seat, the second axis AX102, which is a connection point between the arm member 123 and the arm member 124 of the first link 115, moves toward the front of the seat. Is done. The arm member 124 hangs down on the arm member 123 while rotating forward about the second axis AX102 so as to move the lower rod 121 toward the rear of the seat relative to the second axis AX102 moved toward the front of the seat. .

The arm member 124 is provided with an engaging portion 125 that prevents the arm member 124 from rotating forward beyond a predetermined angle θ1. The engaging portion 125 is provided to extend to the seat back side of the arm member 123 of the first link 115, contacts the arm member 123 with the forward rotation of the arm member 124, and the arm member 124 exceeds the angle θ1. Prevent forward rotation.

When the first link 115 is rotated forward in a state where the forward rotation of the arm member 124 is prevented by the engaging portion 125, the arm member 124 rotates integrally with the arm member 123 of the first link 115, and The whole is moved toward the front of the seat. Thereby, the lower rod 121 is moved toward the front of the seat.

The guide pole 118 is disposed between the second axis AX102 and the lower rod 121 on the seat back side of the arm member 124 of the second link 117, and is fixed to the side frame 10.

Along with the reverse rotation of the first link 115 that moves the upper rod 120 toward the rear of the seat, the second axis AX102 is moved toward the rear of the seat, and the arm member 124 that hangs down on the arm member 123 is disposed on the back side of the seat It abuts on the guide pole 118 and rotates around the second axis AX102 around the guide pole 118 as a fulcrum. Accordingly, the lower rod 121 disposed on the opposite side of the second axis AX102 with the guide pole 118 interposed therebetween is moved toward the front of the seat.

12 and 13 show the operation of the lumbar support 113. FIG.

The positions of the first link 115 and the second link 117 when the lumbar plate 114 shown in FIGS. 12A and 13A is substantially flat are the initial positions of the first link 115 and the second link 117, respectively. And

When the first link 115 is rotated forward about the first axis AX101 by the drive unit 116, the upper rod 120 is moved toward the front of the seat as shown in FIG.

Also, with the forward rotation of the first link 115, the second axis AX102, which is a connection point between the arm member 123 of the first link 115 and the arm member 124 of the second link 117, is moved toward the front of the seat. When the engaging portion 125 comes into contact with the arm member 123, the forward rotation of the arm member 124 around the second axis AX102 is prevented, the arm member 124 rotates integrally with the arm member 123, and the entire arm member 124 is It is moved toward the front of the seat. Thereby, the lower rod 121 is also moved toward the front of the seat.

The upper rod 120 moved to the front of the seat presses the upper portion of the lumbar plate 114 and bulges the upper portion of the lumbar plate 114 toward the front of the seat. In addition, the lower rod 121 moved to the front of the seat is in contact with the lower portion of the lumbar plate 114 and supports the lower portion of the lumbar plate 114.

As a result, for the seated person, the upper waist is supported by the upper part of the lumbar plate 114 bulging forward of the seat, and the lower waist of the lumbar plate 114 supported by the lower rod 121 gives a sense of support to the lower waist. It is done.

Preferably, the amount of displacement of the lower rod 121 forward of the seat with respect to the normal rotation of the first link 115 is equal to or less than the amount of displacement of the upper rod 120 forward of the seat. Thereby, the feeling of support for the lower back can be moderated. The amount of displacement of the lower rod 121 relative to the front of the seat relative to the amount of displacement of the upper rod 120 toward the front of the seat can be set as appropriate depending on, for example, the angle θ1 permitted for normal rotation of the arm member 124 of the second link 117.

In addition, when the first link 115 rotated by the driving unit 116 is rotated forward by a predetermined angle or more, the arm member 124 of the second link 117 rotated integrally with the arm member 123 of the first link 115 is provided on the side frame 10. This is prevented by contacting the stopper 127.

On the other hand, when the first link 115 is reversely rotated around the first axis AX101 by the drive unit 116, the upper rod 120 is moved toward the rear of the seat as shown in FIG.

Further, with the reverse rotation of the first link 115, the second axis AX102 is moved toward the rear of the seat, and the arm member 124 that hangs down on the arm member 123 comes into contact with the guide pole 118 disposed on the back side of the seat, The guide pole 118 rotates around the second axis AX102 around the fulcrum. Accordingly, the lower rod 121 disposed on the opposite side of the second axis AX102 with the guide pole 118 interposed therebetween is moved toward the front of the seat.

The lower rod 121 moved to the front of the seat presses the lower portion of the lumbar plate 114 and bulges the lower portion of the lumbar plate 114 toward the front of the seat. Thereby, the lower back of the seated person is supported.

The reverse rotation of the first link 115 rotated by the driving unit 116 by a predetermined angle or more is prevented by the guide pole 118 and the stopper 129 provided on the arm member 124 of the second link 117. The stopper 129 is provided to extend to the front side of the seat of the arm member 123 of the first link 115, abuts on the arm member 123 as the arm member 124 rotates backward, and exceeds a predetermined angle θ 2 (see FIG. 11). The reverse rotation of the arm member 124 is prevented. In the state where the reverse rotation of the arm member 124 is prevented by the contact between the stopper 129 and the arm member 123, the reverse rotation of the first link 115 that reversely rotates the arm member 124 with the guide pole 118 as a fulcrum is also prevented. The

In this way, the first link 115 is rotated by the drive unit 116 to move the upper rod 120 forward of the seat, and the second link 117 is driven by the rotation of the first link 115 to move the lower rod 121 forward of the seat. By moving, when supporting the upper waist of the seated occupant, not only the upper waist but also the lower waist can be supported by the seat occupant, and this can be performed by the single drive unit 116. Sheet costs can be reduced.

The present invention can be applied to a vehicle seat provided with a lumbar support that supports the waist of a seated person.

This application is based on a Japanese patent application (Japanese Patent Application No. 2015-115920) filed on June 8, 2015, the contents of which are incorporated herein by reference.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 10 Side frame 13 Lumber support 14 Lumber plate 15 1st link 16 Drive part 17 2nd link 20 Upper rod 21 First lower rod 22 Second lower rod 23 Arm member 24 Arm member 25 Engagement part 26 Coil spring AX1 first axis AX2 second axis 113 lumbar support 114 lumbar plate 115 first link 116 drive part 117 second link 118 guide pole 120 upper rod 121 lower rod 123 arm member 124 arm member 125 engaging part AX101 first axis AX102 first 2 axis

Claims

A flexible lumbar plate that is provided inside the seat back and supports the waist of the seated person;
A first link having an upper rod extending in the seat width direction along the upper back surface of the lumbar plate, and rotated about a first axis extending in the seat width direction to move the upper rod in the seat front-rear direction; ,
A second link having a lower rod extending in the seat width direction along the lower back surface of the lumbar plate, and rotating about a second axis extending in the seat width direction to move the lower rod in the seat front-rear direction; ,
A drive unit for rotating the first link around the first axis;
With
The second link is a vehicle seat that follows the rotation of the first link that moves the upper rod forward of the seat and moves the lower rod forward of the seat.
The vehicle seat according to claim 1,
The amount of displacement of the lower rod forward of the seat due to rotation of the second link following the rotation of the first link is less than or equal to the amount of displacement of the upper rod forward of the seat due to rotation of the first link. Sheet.
The vehicle seat according to claim 1 or 2,
The first link and the second link are rotatably supported by a base member,
The first shaft is provided between the upper rod and the lower rod, and the second shaft is provided between the first shaft and the lower rod,
The second link is a vehicle seat further including an engaging portion that is pressed toward the rear of the seat by the first link between the first shaft and the second shaft.
The vehicle seat according to claim 3,
A vehicle seat further comprising an urging member that urges the second link in a rotational direction in which the lower rod is moved rearward of the seat.
The vehicle seat according to claim 3 or 4,
The first link further includes a lower rod that extends in the seat width direction along the lower back surface of the lumbar plate on the opposite side of the upper rod across the first shaft.
The vehicle seat according to claim 1 or 2,
The first link is rotatably supported by a base member, and the second link is connected to the first link on the second shaft,
The first shaft is provided above the upper rod, and the second shaft is provided between the first shaft and the upper rod.
The second link is a vehicle seat further including an engaging portion that abuts the first link and prevents rotation of the second link exceeding a predetermined angle that moves the lower rod rearward of the seat.
The vehicle seat according to claim 6,
A vehicle further comprising a guide pole fixed to the base member and abutting on the second link between the second shaft and the lower rod as the first link rotates to move the upper rod rearward of the seat. Sheet.