Vehicle seat

Abstract

To provide a vehicle seat capable of suppressing complication of a structure of a link in the vehicle seat.SOLUTION: A front link 26 constituting a part of a vehicle seat includes a first link member 30 and a second link member 32. The first link member 30 is rotatably connected to a side frame constituting a skeleton of a seat cushion with a seat width direction being configured to be an axial direction. Further, the second link member 32 is disposed so as to: be offset in the seat width direction with respect to the first link member 30 while being undisplaceable relatively with respect to the first link member 30; and be supported on a vehicle floor side rotatably with the seat width direction being configured to be the axial direction.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a vehicle seat.

Background Art

[0002] Patent Document 1 below discloses a vehicle seat capable of changing the height while inclining the entire seat cushion. The vehicle seat described in this document includes a seat cushion that supports the buttocks of the seated person, a front link that supports the seat cushion, and a rear link that is disposed behind the front link and supports the seat cushion. At least one of the front link and the rear link has a first link member connected to the seat cushion, and a second link member having one end connected to the first link member and the other end connected to the floor side of the vehicle. And, since the first link member and the second link member are relatively rotatable about their connection portion, it is possible to change the height while inclining the entire seat cushion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when the offset distance in the seat width direction between the portion connected to the seat cushion side and the portion connected to the floor side in the link becomes large, it is conceivable that the structure of the link becomes complicated, but the configuration described in Patent Document 1 above does not consider this point.

[0005] In consideration of the above facts, an object of the present invention is to obtain a vehicle seat capable of suppressing the complication of the link structure.

Means for Solving the Problems

[0006] The vehicle seat according to the first aspect includes a seat cushion that supports the buttocks of the seated occupant from below the seat, a pair of left and right side frames that are arranged at intervals in the seat width direction and constitute a part of the framework of the seat cushion, a plurality of links that are rotatably connected to the side frames with the seat width direction as the axial direction and are rotatably supported on the floor side of the vehicle with the seat width direction as the axial direction, a first link member that constitutes a part of at least one of the plurality of links and is rotatably connected to the side frames with the seat width direction as the axial direction, and a second link member that constitutes a part of at least one of the plurality of links, is arranged offset in the seat width direction with respect to the first link member and is made non-displaceable relative to the first link member, and is rotatably supported on the floor side of the vehicle with the seat width direction as the axial direction.

[0007] In the vehicle seat according to the first aspect, a plurality of links are rotatably connected to the side frames with the seat width direction as the axial direction, and are supported rotatably with the seat width direction as the axial direction on the floor side of the vehicle. Therefore, when the plurality of links are displaced, the pair of left and right side frames are displaced in the vertical direction. As a result, the height of the seat cushion in the vertical direction is adjusted. Here, at least one of the plurality of links includes a first link member and a second link member. The first link member is rotatably connected to the side frame with the seat width direction as the axial direction. Further, the second link member is disposed offset in the seat width direction with respect to the first link member and is made non-displaceable relative to the first link member. Further, the second link member is rotatably supported on the floor side of the vehicle with the seat width direction as the axial direction. In this way, in the structure in which at least one of the plurality of links is divided into the first link member and the second link member, it is possible to eliminate the need to incline the portion between the portion connected to the side frame and the portion supported on the floor side in the seat vertical direction in the link. Alternatively, the inclination of the portion between the portion connected to the side frame and the portion supported on the floor side in the link with respect to the seat vertical direction can be alleviated. As a result, even if the offset distance in the seat width direction between the portion connected to the side frame and the portion supported on the floor side in the link increases, it is possible to suppress the link structure from becoming complicated.

[0008] The vehicle seat according to the second aspect is the vehicle seat according to the first aspect, in which the first link member and the second link member are connected via a cylindrical member formed in a cylindrical shape with the seat width direction as the axial direction.

[0009] In the vehicle seat according to the second aspect, the first link member and the second link member are connected via a cylindrical member formed in a cylindrical shape with the seat width direction as the axial direction. In this configuration, by adjusting the dimension of the cylindrical member in the seat width direction, it is possible to adjust the offset distance in the seat width direction between the portion connected to the side frame in the link and the portion supported on the floor side. Further, by using a cylindrical member as the member connecting the first link member and the second link member, it is possible to secure the rigidity of the link while suppressing an increase in the weight of the link.

[0010] The vehicle seat according to the third aspect is the vehicle seat according to the first aspect, in which the link disposed on one side in the seat width direction and including the first link member and the second link member and the link disposed on the other side in the seat width direction and including the first link member and the second link member are coupled via a connecting member extending in the seat width direction.

[0011] The vehicle seat according to the third aspect is such that a pair of left and right links having the first link member and the second link member are coupled via a connecting member. Thereby, it is possible to synchronize the pair of left and right links.

[0012] The vehicle seat according to the fourth aspect is the vehicle seat according to the first aspect, in which the link disposed on one side in the seat width direction and including the first link member and the second link member and the link disposed on the other side in the seat width direction and including the first link member and the second link member are coupled via a cylindrical member formed in a cylindrical shape with the seat width direction as the axial direction.

[0013] The vehicle seat according to the fourth aspect is such that a pair of left and right links having the first link member and the second link member are coupled via a cylindrical member. Thereby, it is possible to synchronize the pair of left and right links. Further, since the cylindrical member connecting the pair of left and right links is formed in a cylindrical shape, it is possible to suppress an increase in weight while ensuring the torsional rigidity of the cylindrical member.

[0014] In the vehicle seat according to the fifth aspect, in the vehicle seat according to the first aspect, the first link member and the second link member that constitute the link disposed on one side in the seat width direction are connected via a cylindrical member formed in a cylindrical shape with the seat width direction as the axial direction, and the first link member and the second link member that constitute the link disposed on the other side in the seat width direction are connected via a cylindrical member formed in a cylindrical shape with the seat width direction as the axial direction, and the link disposed on one side in the seat width direction and the link disposed on the other side in the seat width direction are coupled via a connecting member that extends in the seat width direction and is inserted into a pair of left and right cylindrical members.

[0015] According to the vehicle seat of the fifth aspect, the cylindrical member and the connecting member form a double structure, and the strength and rigidity of the portion can be improved.

Advantages of the Invention

[0016] The vehicle seat according to the present invention has an excellent effect that it can suppress the complexity of the link structure.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0018] The vehicle seat 10 of the present embodiment will be described with reference to FIGS. 1 to 3. In the figures, the arrow UP indicates the upper side of the seat, the arrow RH indicates the right side in the seat width direction, and the arrow LH indicates the left side in the seat width direction. Also, in the following description, when the directions of front and rear, up and down, and left and right are used without special mention, they indicate the front and rear in the seat front-rear direction, the up and down in the seat up-down direction, and the left and right in the seat width direction.

[0019] As shown in FIG. 1, the vehicle seat 10 of the present embodiment includes a seat cushion 12 that supports the buttocks of the seated occupant from below, a seat back 14 that supports the back of the seated occupant from the rear, and a headrest 16 that supports the head of the seated occupant from the rear.

[0020] The seat cushion 12 includes a cushion frame 18 that constitutes the skeleton of the seat cushion 12, and a cushion pad 20 attached to the cushion frame 18.

[0021] The cushion frame 18 includes a pair of left and right side frames 22 that are arranged at intervals in the seat width direction and extend in the front-rear direction. Here, a pair of left and right seat rails 24 are provided on the lower side of the pair of left and right side frames 22. The pair of left and right seat rails 24 (lower rails) are fixed to the floor of the vehicle body (not shown). The pair of left and right side frames 22 and the pair of left and right seat rails 24 are connected via front links 26 and rear links 28, which will be described later.

[0022] The front portions of the pair of left and right side frames 22 and the pair of left and right seat rails 24 (upper rails) are connected via a pair of left and right front links 26 as links. The upper end of the left front link 26 is rotatably connected to the left side frame 22 about the seat width direction as an axial direction. The lower end of the left front link 26 is rotatably supported by the left seat rail 24 about the seat width direction as an axial direction. The upper end of the right front link 26 is rotatably connected to the right side frame 22 about the seat width direction as an axial direction. The lower end of the right front link 26 is rotatably supported by the right seat rail 24 about the seat width direction as an axial direction.

[0023] The rear portions of the pair of left and right side frames 22 and the pair of left and right seat rails 24 (apparel) are connected via a pair of rear links 28 as links. The upper end of the left rear link 28 is rotatably connected to the left side frame 22 about the seat width direction as the axial direction. Further, the lower end of the left rear link 28 is rotatably supported by the left seat rail 24 about the seat width direction as the axial direction. Further, the upper end of the right rear link 28 is rotatably connected to the right side frame 22 about the seat width direction as the axial direction. Further, the lower end of the right rear link 28 is rotatably supported by the right seat rail 24 about the seat width direction as the axial direction.

[0024] Then, when the pair of left and right front links 26 and the pair of left and right rear links 28 tilt (displace), the height of the cushion frame 18 in the vertical direction changes, and the height of the seat cushion 12 in the vertical direction is adjusted.

[0025] Next, the detailed configuration of the pair of left and right front links 26 will be described. The right front link 26 and the left front link 26 are symmetrically configured in the seat width direction. Therefore, in the following description, the configuration of the right front link 26 will be described.

[0026] As shown in FIGS. 2 and 3, the front link 26 includes a first link member 30 and a second link member 32 formed in a plate shape with the seat width direction as the thickness direction, and a cylindrical member 34 that connects the first link member 30 and the second link member 32.

[0027] The first link member 30 is formed in an oval shape with both longitudinal ends curved in a side view of the seat. A circular shaft member insertion hole 30B that penetrates the longitudinal end 30A on one side of the first link member 30 in the seat width direction is formed at the longitudinal end 30A on one side of the first link member 30. And the longitudinal end 30A on one side of the first link member 30 is connected to the side frame 22 via a shaft member (not shown) inserted into the shaft member insertion hole 30B. Also, a circular cushion pipe insertion hole 30D that penetrates the longitudinal end 30C on the other side of the first link member 30 in the seat width direction is formed at the longitudinal end 30C on the other side of the first link member 30.

[0028] The second link member 32 is formed in an oval shape with both longitudinal ends curved in a side view of the seat, similar to the first link member 30. A circular shaft member insertion hole 32B that penetrates the longitudinal end 32A on one side of the second link member 32 in the seat width direction is formed at the longitudinal end 32A on one side of the second link member 32. And the longitudinal end 32A on one side of the second link member 32 is connected to the seat rail 24 via a shaft member (not shown) inserted into the shaft member insertion hole 32B. Also, a circular cushion pipe insertion hole 32D that penetrates the longitudinal end 32C on the other side of the second link member 32 in the seat width direction is formed at the longitudinal end 32C on the other side of the second link member 32. The inner diameter of this cushion pipe insertion hole 32D is set to the same inner diameter as the cushion pipe insertion hole 30D formed in the first link member 30.

[0029] The cylindrical member 34 is formed in a cylindrical shape with the sheet width direction as the axial direction. The inner diameter of this cylindrical member 34 is set to the same inner diameter as the inner diameter of the cushion pipe insertion hole 30D formed in the first link member 30 and the inner diameter of the cushion pipe insertion hole 32D formed in the second link member 32. Then, with the cylindrical member 34 and the cushion pipe insertion hole 30D formed in the first link member 30 arranged coaxially, the end portion on the outer side (right side) in the sheet width direction of the cylindrical member 34 and the end portion 30C on the other side in the longitudinal direction of the first link member 30 are joined by welding or the like. Also, with the cylindrical member 34 and the cushion pipe insertion hole 32D formed in the second link member 32 arranged coaxially, the end portion on the inner side (left side) in the sheet width direction of the cylindrical member 34 and the end portion 32C on the other side in the longitudinal direction of the second link member 32 are joined by welding or the like. As a result, the second link member 32 is arranged offset inward in the sheet width direction with respect to the first link member 30 and in a state where the second link member 32 is relatively immovable with respect to the first link member 30, and the first link member 30 and the second link member 32 are connected via the cylindrical member 34.

[0030] As shown in FIG. 2, between the front ends of a pair of left and right side frames 22, a front cushion pipe 36 is provided as a connecting member formed in a cylindrical shape with the seat width direction as the axial direction. As shown in FIGS. 2 and 3, the right end 36A of this front cushion pipe 36 is inserted into a cushion pipe insertion hole 30D of a first link member 30 constituting the right front link 26, a cushion pipe insertion hole 32D of a second link member 32, and a cylindrical member 34. Although not shown, the left end of the front cushion pipe 36 is inserted into a cushion pipe insertion hole 30D of a first link member 30 constituting the left front link 26, a cushion pipe insertion hole 32D of a second link member 32, and a cylindrical member 34. Further, the front cushion pipe 36 is joined to the first link member 30 and the second link member 32 constituting the right front link 26 by welding. Although not shown, the front cushion pipe 36 is joined to the first link member 30 and the second link member 32 constituting the left front link 26 by welding. As a result, the movements of the right front link 26 and the left front link 26 are synchronized via the front cushion pipe 36.

[0031] (Operations and Effects of this Embodiment) Next, the operations and effects of this embodiment will be described.

[0032] As shown in FIGS. 1, 2, and 3, in the vehicle seat 10 of this embodiment, a pair of left and right front links 26 and a pair of left and right rear links 28 are rotatably connected to a pair of left and right side frames 22 with the seat width direction as the axial direction, and are rotatably supported by a pair of left and right seat rails 24 with the seat width direction as the axial direction. Therefore, when the pair of left and right front links 26 and the pair of left and right rear links 28 tilt, the pair of left and right side frames 22 (cushion frames 18) are displaced in the vertical direction. As a result, the height of the seat cushion 12 in the vertical direction is adjusted.

[0033] Here, the pair of left and right front links 26 is configured to include a first link member 30 and a second link member 32. The first link member 30 is rotatably connected to the side frame 22 with the sheet width direction as the axial direction. Further, the second link member 32 is arranged offset in the sheet width direction with respect to the first link member 30 and is made non-displaceable relative to the first link member 30. Also, the second link member 32 is rotatably supported by the seat rail 24 with the sheet width direction as the axial direction. In this way, in the structure where the pair of left and right front links 26 is divided into the first link member 30 and the second link member 32, it is possible to eliminate the need to incline the portion between the portion connected to the side frame 22 and the portion supported by the seat rail 24 in the front link 26 with respect to the sheet vertical direction. Or, it is possible to gently incline the portion between the portion connected to the side frame 22 and the portion supported by the seat rail 24 in the front link 26 with respect to the sheet vertical direction. As a result, even if the offset distance in the sheet width direction between the portion connected to the side frame 22 and the portion supported by the seat rail 24 in the front link 26 increases, it is possible to suppress the complication of the structure of the front link 26.

[0034] Further, in the present embodiment, the first link member 30 and the second link member 32 are connected via a cylindrical member 34 formed in a cylindrical shape with the sheet width direction as the axial direction. In this configuration, by adjusting the dimension of the cylindrical member 34 in the sheet width direction, it is possible to adjust the offset distance in the sheet width direction between the portion connected to the side frame 22 and the portion supported by the seat rail 24 in the front link 26. Also, by using the cylindrical member 34 as the member connecting the first link member 30 and the second link member 32, it is possible to ensure the rigidity of the front link 26 while suppressing an increase in the weight of the front link 26.

[0035] In addition, in the present embodiment, both ends of the front cushion pipe 36 are inserted into a pair of left and right front links 26 (the cushion pipe insertion hole 30D of the first link member 30, the cushion pipe insertion hole 32D of the second link member 32, and the cylindrical member 34). As a result, the cylindrical member 34 and the front cushion pipe 36 form a double structure, and the strength and rigidity of this portion can be improved.

[0036] Note that, in the present embodiment described above, an example in which both ends of the front cushion pipe 36 are inserted into a pair of left and right front links 26 (the cushion pipe insertion hole 30D of the first link member 30, the cushion pipe insertion hole 32D of the second link member 32, and the cylindrical member 34) has been described. However, the present invention is not limited to this. For example, a configuration in which both ends of the front cushion pipe 36 are not inserted into a pair of left and right front links 26 may be adopted.

[0037] In addition, in the present embodiment, an example in which the first link member 30 and the second link member 32 are connected via the cylindrical member 34 has been described. However, the present invention is not limited to this. For example, the first link member 30 and the second link member 32 may be configured to be connected via another member such as the front cushion pipe 36. Further, a front link 26 disposed on one side in the seat width direction and including the first link member 30 and the second link member 32 and a front link 26 disposed on the other side in the seat width direction and including the first link member 30 and the second link member 32 may be connected via the front cushion pipe 36 as a cylindrical member having the seat width direction as the axial direction. In this configuration, it is possible to suppress an increase in weight while ensuring the torsional rigidity of the front cushion pipe 36.

[0038] In addition, in the present embodiment, an example in which a pair of left and right front links 26 are divided into a first link member 30 and a second link member 32 has been described, but the present invention is not limited to this. For example, one of the pair of left and right front links 26 may be divided into a first link member 30 and a second link member 32. Further, the rear link 28 may be divided into a first link member 30 and a second link member 32.

[0039] As described above, an embodiment of the present invention has been described. However, the present invention is not limited to the above, and it goes without saying that various modifications can be made and implemented within the scope without departing from the gist of the present invention.

Explanation of Reference Numerals

[0040] 10 Vehicle seat 12 Seat cushion 22 Side frame 26 Front link (link) 28 Rear link (link) 30 First link member 32 Second link member 34 Cylindrical member 36 Front cushion pipe (connecting member)

Claims

1. a seat cushion that supports the buttocks of a seated occupant from below the seat; A pair of left and right side frames that are arranged at an interval in the seat width direction and form a part of the framework of the seat cushion; a plurality of links that are rotatably connected to the side frames with the seat width direction as an axial direction and that are supported on a vehicle floor side so as to be rotatable with the seat width direction as an axial direction; a first link member that constitutes a part of at least one of the links and is rotatably connected to the side frame with the seat width direction as an axial direction; a second link member that constitutes a part of at least one of the plurality of links, that is disposed offset in the seat width direction with respect to the first link member, that is not displaceable relatively to the first link member, and that is supported on a floor side of the vehicle so as to be rotatable about an axial direction that is the seat width direction; A vehicle seat comprising:

2. The vehicle seat according to claim 1 , wherein the first link member and the second link member are connected via a tubular member that is formed into a cylindrical shape with its axial direction aligned in the seat width direction.

3. 2. The vehicle seat according to claim 1, wherein the link arranged on one side in the seat width direction and including the first link member and the second link member, and the link arranged on the other side in the seat width direction and including the first link member and the second link member are connected via a connecting member extending in the seat width direction.

4. 2. The vehicle seat according to claim 1, wherein the link arranged on one side in the seat width direction and configured to include the first link member and the second link member, and the link arranged on the other side in the seat width direction and configured to include the first link member and the second link member are connected via a tubular member formed in a cylindrical shape with the seat width direction as its axial direction.

5. The first link member and the second link member constituting the link arranged on one side in the seat width direction are connected via a cylindrical member formed in a cylindrical shape with the seat width direction as an axial direction, the first link member and the second link member constituting the link arranged on the other side in the seat width direction are connected via a cylindrical member formed in a cylindrical shape with the seat width direction as an axial direction, 2. The vehicle seat according to claim 1, wherein the link arranged on one side in the seat width direction and the link arranged on the other side in the seat width direction are connected via a connecting member extending in the seat width direction and inserted into a pair of left and right tubular members.

Images