Vehicular seat

Abstract

To provide a seat cushion with an extending function and an elevating / lowering function without enlarging the seat cushion.SOLUTION: A seat includes a seat cushion, an extension device 7 capable of changing the length of the seat cushion in the front-rear direction, and a raising / lowering device 6 capable of changing the height of the seat cushion. The seat cushion includes a front panel 24 and has a cushion frame 20 forming a skeleton. The extending device 7 includes the extending portion 71 and the base portion 70 that is fixed to the front panel 24 via the pair of left and right brackets 74R and 74L and supports the extending portion 71 so as to be able to extend forward, and the raising / lowering device 6 includes the pair of left and right front link portions 61R and 61L that is provided inside the cushion frame 20 and can raise and lower the front portion of the cushion frame 20. The pair of left and right brackets 74R and 74L is disposed on the inner side in the left-right direction of the pair of left and right front link portions 61R and 61L in top view.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a vehicle seat in which a seat cushion is variably configured.

Background Art

[0002] Conventionally, as this type of device, a vehicle seat configured to be able to change the length of the seat cushion in the front-rear direction or the height of the seat cushion is known (see, for example, Patent Documents 1 and 2). The vehicle seat described in Patent Document 1 is configured such that the length of the seat cushion in the front-rear direction can be changed by extending the front end portion, and the vehicle seat described in Patent Document 2 is configured such that the height of the seat cushion can be changed by raising and lowering the seat cushion using a link.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when providing the seat cushion with the above-described extending function and raising / lowering function, it is necessary to avoid interference between the components constituting each function, and there is a risk that the seat cushion will become larger in size.

Means for Solving the Problems

[0005] A vehicle seat according to one aspect of the present invention includes a seat cushion that supports the buttocks of an occupant, an extension device capable of changing the longitudinal length of the seat cushion, and a lifting device capable of changing the height of the seat cushion. The seat cushion includes a front panel disposed at the front, and has a cushion frame having a substantially rectangular shape in top view that forms the skeleton of the seat cushion. The extension device has an extension portion and a fixed support portion that is fixed to the front panel via a pair of left and right brackets and supports the extension portion so as to be extendable forward. The lifting device is provided inside each of the left and right side portions of the cushion frame in the left-right direction, and has a pair of left and right links capable of lifting the front portion of the cushion frame. Each of the pair of left and right brackets is disposed inside the left and right directions of each of the pair of left and right links in top view.

Advantages of the Invention

[0006] According to the present invention, an extension function and a lifting function can be provided to the seat cushion without increasing the size of the seat cushion.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3A

Figure 3B

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0008] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 6. The vehicle seat according to the embodiment of the present invention is a seat provided with a lifting device for lifting and lowering a seat cushion and an extending device that extends from the seat cushion to increase the cushion length, and can be used for seats installed in various vehicles such as airplanes, railways, and automobiles. Hereinafter, as an example of a vehicle seat, a seat installed in an automobile, particularly a front seat (hereinafter simply referred to as a seat) used for the front seat of an automobile will be used for explanation. Also, hereinafter, the front-rear direction, left-right direction (width direction), and up-down direction (height direction) will be defined based on the occupant sitting on the seat, and the configuration of each part will be described according to this definition.

[0009] First, the main part configuration of the seat 1 according to the present embodiment will be described with reference to FIGS. 1 to 6. FIG. 1 is a perspective view showing the main part configuration of the seat 1 according to the present embodiment.

[0010] As shown in FIG. 1, the seat 1 includes a seat cushion 2 that supports the occupant's buttocks, a seat back 3 that supports the occupant's upper body (waist and back), a headrest 4 that supports the occupant's head, a slide device 5 that supports the seat cushion 2 so as to be movable in the front-rear direction, a lifting device 6 that lifts and lowers the seat cushion 2, and an extending device 7 that extends the cushion length of the seat cushion 2.

[0011] The seat cushion 2 has a cushion frame 20 having a substantially rectangular shape in plan view that forms a skeleton along the outer shape of the seat cushion 2, a cushion pad 21 made of a cushion material such as urethane foam, and a skin material 22 made of synthetic leather or fabric. The cushion pad 21 is attached to the cushion frame 20 and covered with the skin material 22 to form it.

[0012] The seat back 3 has a seat back frame 30 that forms a skeleton along the outer shape of the seat back 3, a cushion pad 31, and a skin material 32. Similar to the seat cushion 2, the seat back 3 is formed by attaching the cushion pad 31 to the seat back frame 30 and covering it with the skin material 32. Further, the seat back 3 is pivotally supported by the seat cushion 2 at the rear end portion of the seat cushion 2 about a pivot shaft 33 extending in the left-right direction, and has a reclining function.

[0013] The headrest 4 does not have a frame that forms a skeleton like the seat cushion 2 or the seat back 3, and is formed by covering a cushion pad 41 formed in a predetermined shape with a skin material 42. A headrest stay 43 is disposed inside the headrest 4, and the headrest 4 is supported by the seat back frame 30 via the headrest stay 43 so as to be movable in the vertical direction.

[0014] The slide device 5 is provided to extend in the front-rear direction on the floor 10 (vehicle body floor portion) of the vehicle on which the seat 1 is disposed, and supports the cushion frame 20 via the lifting device 6. That is, the lifting device 6 is interposed between the cushion frame 20 and the slide device 5.

[0015] FIG. 2 is a perspective view showing the cushion frame 20, the slide device 5, and the lifting device 6 according to the present embodiment. As shown in FIG. 2, the cushion frame 20 has a pair of left and right side frames 23R and 23L extending in the front-rear direction, a front panel 24 extending in the left-right direction and spanning each of the pair of left and right side frames 23R and 23L, a front pipe 25 extending in the left-right direction and connecting the pair of left and right side frames 23R and 23L to each other in the vicinity of the rear end portion of the front panel 24, a rear pipe 26 extending in the left-right direction and connecting the rear end portions of the pair of left and right side frames 23R and 23L to each other, and a cushion panel 27 spanning the front pipe 25 and the rear pipe 26.

[0016] Each of the pair of left and right side frames 23R and 23L is formed in a substantially plate shape facing in the left-right direction, and is formed to be wider in the vertical direction as it goes rearward. Further, a flange portion 231 extending inward or outward is provided at the outer edge of each of the pair of left and right side frames 23R and 23L, and each of the pair of left and right side frames 23R and 23L is reinforced.

[0017] The front panel 24 is formed in a substantially plate shape facing in the vertical direction, and has a pair of left and right convex portions 24R and 24L formed such that both ends in the left-right direction protrude upward, and a concave portion 24C provided between the pair of left and right convex portions 24R and 24L. Each of the pair of left and right convex portions 24R and 24L is formed in a notch shape with its front being notched, and the remaining both ends are fixed to the flange portions 231 of the pair of left and right side frames 23R and 23L. Further, the right convex portion 24R is formed in a convex shape so as not to contact a gear cover (cover member) 64 that covers a right front link portion 61R described later, and the left convex portion 24L is formed in a convex shape so as not to contact a left front link portion 61L described later. The concave portion 24C is provided such that its tip is located at substantially the same position in the front-rear direction as the front end portions of the pair of left and right side frames 23R and 23L respectively, and an extension device 7 is arranged in the concave portion 24C.

[0018] The front pipe 25 is arranged adjacent to the rear end portion of the front panel 24, and connects the pair of left and right side frames 23R and 23L to each other at the rear end portion of the front panel 24. The rear pipe 26 connects the rear end portions of the pair of left and right side frames 23R and 23L, which are wider in the vertical direction, at a position higher than the front pipe 25. The cushion panel 27 is formed in a substantially plate shape facing in the vertical direction, and is provided in a state of being recessed downward so as to be able to receive a load or the like from above by a seated occupant in a state of being spanned over the front pipe 25 and the rear pipe 26.

[0019] The slide device 5 is fixed to the vehicle floor 10 via a pair of left and right feet 50R and 50L. The slide device 5 extends in the front-rear direction and includes a pair of left and right lower rails 51R and 51L that are fixed to the floor 10 by the pair of left and right feet 50R and 50L, a pair of left and right upper rails 52R and 52L that extend in the front-rear direction and are slidably supported by the pair of left and right lower rails 51R and 51L, and a drive device 53 that slides the pair of left and right upper rails 52R and 52L on the pair of left and right lower rails 51R and 51L.

[0020] The drive device 53 includes a connecting portion 54 that extends in the left-right direction and connects the front end portions of the pair of left and right lower rails 51R and 51L, a slide actuator 55 attached to the connecting portion 54, and a pair of left and right power transmission mechanisms 56R and 56L that transmit the driving force of the slide actuator 55 to each of the pair of left and right upper rails 52R and 52L to slide (relatively move) the pair of left and right upper rails 52R and 52L on the pair of left and right lower rails 51R and 51L.

[0021] The pair of left and right power transmission mechanisms 56R and 56L includes, for example, a pair of left and right screw shafts that extend in the front-rear direction along each of the pair of left and right lower rails 51R and 51L, and a pair of left and right ball screws that are inserted through each of the pair of left and right screw shafts and connected to each of the pair of left and right upper rails 52R and 52L. When the pair of left and right screw shafts rotate by the driving force of the slide actuator 55, the pair of left and right ball screws move on the pair of left and right screw shafts, whereby the pair of left and right upper rails 52R and 52L move on the pair of left and right lower rails 51R and 51L.

[0022] FIG. 3A is a side view of the lifting device 6 attached to the right side frame 23R as viewed from the inner side in the left-right direction, and FIG. 3B is a side view of the lifting device 6 attached to the left side frame 23L as viewed from the inner side in the left-right direction. In FIG. 3A, the gear cover 64 is shown by a dashed line to make it easier to view the right front link portion 61R.

[0023] As shown in FIGS. 3A and 3B, the lifting device 6 is interposed between the cushion frame 20 and the slide device 5. Specifically, the lifting device 6 is rotatably supported by a pair of left and right upper brackets 57R and 57L connected to a pair of left and right upper rails 52R and 52L. The pair of left and right upper brackets 57R and 57L extend along the extending direction of the pair of left and right upper rails 52R and 52L and are connected to the upper surfaces of the pair of left and right upper rails 52R and 52L.

[0024] The lifting device 6 includes a pair of left and right front link portions 61R and 61L, a front actuator 62 (see FIG. 2) for driving the right front link portion 61R, a front pinion gear (rotating shaft member) 63 for connecting the right front link portion 61R and the front actuator 62, a gear cover 64 for covering at least a part of the right front link portion 61R, a pair of left and right rear link portions 65R and 65L, a rear actuator 66 (see FIG. 2) for driving the left rear link portion 65L, and a rear pinion gear 67 for connecting the left rear link portion 65L and the rear actuator 66 (see FIG. 2).

[0025] The right front link portion 61R and the front pinion gear 63 are arranged inside the right side frame 23R in the left - right direction, and the gear cover 64 is arranged further inside the right front link portion 61R and the front pinion gear 63 in the left - right direction. That is, the right front link portion 61R and the front pinion gear 63 are arranged between the right side frame 23R and the gear cover 64. The front actuator 62 is arranged outside the right side frame 23R in the left - right direction. That is, the front actuator 62 is arranged on the surface of the right side frame 23R opposite to the right front link portion 61R.

[0026] As shown in FIG. 3A, the right front link portion 61R has a front link 611 and a sector link 612 connected to the front link 611. The sector link 612 is connected to the front actuator 62 via a front pinion gear 63. Specifically, the front link 611 has a base end portion rotatably supported by the front end portion of the right upper bracket 57R about a rotation axis 613 having the left-right direction as an axis, and a tip end portion rotatably connected to the sector link 612 about a rotation axis 614 having the left-right direction as an axis. The sector link 612 is rotatably supported by the right side frame 23R about the front pipe 25, and a gear portion 612g thereof meshes with the front pinion gear 63. The front pinion gear 63 is rotatably supported by the right side frame 23R with the left-right direction as an axis, and is connected to the front actuator 62 via a gear train (not shown). The right front link portion 61R is driven by the driving force of the front actuator 62 being transmitted to the front pinion gear 63 via the gear train, and the sector link 612 rotating via the gear portion 612g meshing with the front pinion gear 63.

[0027] The gear cover 64 is provided so as to cover the rotation axis 614, the sector link 612, the front pinion gear 63, etc., and prevents foreign matters such as the cushion pad 21 from being mixed into these.

[0028] As shown in FIG. 3B, the left front link portion 61L has a front link 615 and a support link 616 connected to the front link 615, and is driven following the right front link portion 61R. Specifically, the front link 615 has a base end portion rotatably supported by the front end portion of the left upper bracket 57L about a rotation axis 617 having the left-right direction as an axis, and a tip end portion rotatably connected to one end portion of the support link 616 about a rotation axis 618 having the left-right direction as an axis. The other end portion of the support link 616 is rotatably supported by the left side frame 23L about the front pipe 25. The left front link portion 61L is driven by the operation being transmitted to the support link 616 via the front pipe 25.

[0029] As shown in FIG. 3A, the right rear link portion 65R has a rear link 651 and is driven following the operation of the left rear link portion 65L. Specifically, the rear link 651 has a rotation axis 652 with the left - right direction as the axis. The base end portion is rotatably supported at the rear end portion of the right upper bracket 57R, and the tip end portion is rotatably supported at the rear end portion of the left side frame 23L around the rear pipe 26. The operation of the left rear link portion 65L is transmitted through the rear pipe 26 to drive the right rear link portion 65R.

[0030] As shown in FIG. 3B, the left rear link portion 65L has a sector link 653, and the sector link 653 is connected to the rear actuator 66 via a rear pinion gear 67. Specifically, the sector link 653 has a rotation axis 654 with the left - right direction as the axis. The base end portion is rotatably supported at the rear end portion of the left upper bracket 57L, and the tip end portion is rotatably supported at the rear end portion of the left side frame 23L around the rear pipe 26. The gear portion 653g of the sector link 653 meshes with the front - located rear pinion gear 67. The rear pinion gear 67 is rotatably supported on the left side frame 23L with the left - right direction as the axis and is connected to the rear actuator 66 via a gear train (not shown). The left rear link portion 65L is driven when the driving force of the rear actuator 66 is transmitted to the rear pinion gear 67 via the gear train, and the sector link 653 is rotated via the gear portion 653g that meshes with the rear pinion gear 67.

[0031] FIG. 4 is a perspective view showing a schematic configuration of the extension device 7 attached to the front panel 24, and FIG. 5 is an exploded perspective view of the extension device 7 shown in FIG. 4. As shown in FIG. 4, the extension device 7 is attached to the recess 24C of the front panel 24. The cushion frame 20 is provided with the recess 24C in the front panel 24, and by attaching the extension device 7 to the recess 24C, even when the extension device 7 is provided, an increase in the thickness in the vertical direction is suppressed from becoming unnecessarily large. For example, the recess 24C is formed so that the upper end of the mounted extension device 7 is not positioned above the upper ends of the pair of left and right side frames 23R and 23L. Note that the front panel 24 according to the present embodiment is made of metal and can support a load from above.

[0032] As shown in FIGS. 4 and 5, the extension device 7 includes a base portion (fixed support portion) 70 fixed to the recess 24C of the front panel 24, an extension portion 71 supported by the base portion 70 so as to be extendable from the base portion 70, a pressing portion 72 fixed to the tip of the extension portion 71, an operation portion 73 that can be operated so that the pressing portion 72 extends forward together with the extension portion 71, a pair of left and right brackets 74R and 74L supported by the base portion 70, and a rear bracket 75 disposed behind the pair of left and right brackets 74R and 74L. In the present embodiment, the base portion 70, the extension portion 71, and the operation portion 73 are made of synthetic resin, and the pressing portion 72, the pair of left and right brackets 74R and 74L, and the rear bracket 75 are made of metal capable of supporting a load from above.

[0033] The base portion 70 is formed in a rectangular plate shape that is long in the left - right direction and is fixed to the recess 24C by bolts and nuts 76. The base portion 70 also has a pair of left - and - right first support portions 701R and 701L that support the extension portion 71 so as to be movable in the front - rear direction, and a pair of left - and - right second support portions 702R and 702L that support a pair of left - and - right brackets 74R and 74L. The pair of left - and - right first support portions 701R and 701L are provided to extend in the front - rear direction at a substantially central portion in the left - right direction and are formed to protrude upward from the upper surface of the base portion 70. The pair of left - and - right second support portions 702R and 702L are provided outside the pair of left - and - right first support portions 701R and 701L in the left - right direction, that is, at both ends of the base portion 70 in the left - right direction. The pair of left - and - right second support portions 702R and 702L are constituted by openings that open in the vertical direction (thickness direction) and communicate with a pair of left - and - right support portions 241R and 241L formed in the recess 24C of the front panel 24.

[0034] The extension portion 71 is formed so as to be placeable on the base portion 70 and is formed in a rectangular plate shape that is shorter than the base portion 70 in the left - right direction. The extension portion 71 has a pair of left - and - right engaging portions (not shown) on its lower surface that can engage with the pair of left - and - right first support portions 701R and 701L of the base portion 70. By engaging the pair of left - and - right engaging portions with the pair of left - and - right first support portions 701R and 701L, the extension portion 71 can move along the pair of left - and - right first support portions 701R and 701L. The extension portion 71 also has a fixing portion 711 on the upper surface of the front for fixing the pressing portion 72, and the pressing portion 72 is fixed to the extension portion 71 via the fixing portion 711. For example, the fixing portion 711 is constituted by a pair of left - and - right locking claws 711R and 711L, and the pressing portion 72 is fixed to the extension portion 71 by locking the pair of left - and - right locking claws 711R and 711L into a pair of left - and - right locked holes 721R and 721L formed in the pressing portion 72.

[0035] The pressing portion 72 extends in the left - right direction and has a panel portion 721 located at the front end of the cushion frame 20 and a pair of left - and - right bumper portions 722R and 722L located at both left - and - right ends in the left - right direction of the panel portion 721. The panel portion 721 is formed in a plate - like shape extending in the left - right direction and is arranged facing in the up - down direction. In the panel portion 721, the above - mentioned pair of left - and - right engaged holes 721R and 721L are formed and are fixed to the extending portion 71 via the pair of left - and - right locking claws 711R and 711L of the extending portion 71. The pair of left - and - right bumper portions 722R and 722L are provided facing in the front - rear direction and are formed so as to be able to press the skin material 22 of the seat cushion 2 forward.

[0036] The operating portion 73 is attached to the tip of the extending portion 71 and is used by the seated person on the seat 1 to grip and extend the extending portion 71 from the base portion 70 or to accommodate the extending portion 71 in the base portion 70. The operating portion 73 has a locking mechanism (not shown) and is provided so as to be able to lock the extending portion 71 at a predetermined extended position.

[0037] The pair of left - and - right brackets 74R and 74L are supported by the base portion 70 via bolts and nuts 76. Specifically, the pair of left - and - right brackets 74R and 74L are supported by the base portion 70 fixed to the front panel 24 via bolts and nuts 76 that penetrate the pair of left - and - right second support portions 702R and 702L and the pair of left - and - right support portions 241R and 241L communicating therewith.

[0038] Each of the pair of left and right brackets 74R and 74L includes a rectangular plate-shaped bottom portion 741, a pair of left and right wall portions 742R and 742L erected upward from the bottom portion 741, and a pair of left and right extending portions 743R and 743L extending outward in the left-right direction from the upper ends of the pair of left and right wall portions 742R and 742L. The bottom portion 741 is supported by bolts and nuts 76, and the pair of left and right wall portions 742R and 742L are erected upward from both sides in the left-right direction of the bottom portion 741. The pair of left and right extending portions 743R and 743L are formed in a planar shape so as to be able to support a load from above. The load from above received by the pair of left and right extending portions 743R and 743L is further supported by a metal front panel 24 via the bolts and nuts 76.

[0039] FIG. 6 is a plan view of a cushion frame 20 on which a lifting device 6 and an extending device 7 are mounted. In FIG. 6, a pressing portion 72 and a rear bracket 75 fixed to the extending portion 71 are omitted. As shown in FIG. 6, each of the pair of left and right brackets 74R and 74L is disposed inside the left and right directions of each of the pair of left and right front link portions 61R and 61L when viewed from above. Further, the right extending portion 743R of the right bracket 74R is formed so as to cover the right front link portion 61R and is formed so as to at least partially overlap when viewed from above. For example, the right extending portion 743R extends outward in the left-right direction (right side) so as to at least partially overlap with the gear cover 64, and the length of the right extending portion 743R in the left-right direction is longer than the length of the left extending portion 743L in the left-right direction.

[0040] The rear bracket 75 is formed in a plate shape extending in the left - right direction and is arranged facing in the up - down direction. The rear bracket 75 is provided behind a pair of left - right brackets 74R, 74L and above the base portion 70, and is formed to be able to support a load from above. The load from above received by the rear bracket 75 is further supported by the metal front panel 24 through the connected portion. Incidentally, the rear bracket 75 may be arranged so as to be located above the front pinion gear 63. By arranging it in this way, the front pinion gear 63 can be protected, and for example, it is possible to suppress foreign matters such as the cushion pad 21 from entering the gaps between the gears or the meshing portions of the gears.

[0041] The seat 1 configured as described above can increase the length (cushion length) of the seat cushion 2 or change the posture of the seat cushion 2 so that the seated person can take an appropriate driving posture.

[0042] For example, in the case of a seated person with a tall stature, the thigh portion of the seated person may protrude from the seat cushion 2. However, by lengthening the length of the seat cushion 2 in the front - rear direction with the extension device 7, the thigh portion of the seated person can be supported by the seat cushion 2 without protruding from the seat cushion 2. Thereby, the fatigue of the seated person during driving can be reduced.

[0043] Also, for example, in the case of a seated person with a short stature, the feet of the seated person may have difficulty reaching the operation pedals (accelerator pedal and brake pedal). In such a case, by lowering the seat surface of the seat 1, the feet of the seated person can be brought closer to the operation pedals. However, if only the seat surface is lowered, it may be difficult to see the front due to the relationship of the seat height. Therefore, like the seat 1 according to the present embodiment, by using the lifting device 6 having a pair of left - right front link portions 61R, 61L and a pair of left - right rear link portions 65R, 65L, for example, when lowering the seat surface, by setting the rear portion of the seat cushion 2 to a forward - inclined posture with the rear portion raised, the feet of the seated person can easily reach the operation pedals and the front can also be easily seen.

[0044] Furthermore, for example, in the case of a tall seated person, the seat surface of the seat 1 may be lowered due to the relationship of the seat height. However, when the seat surface of the seat 1 is horizontal, the thigh of the seated person may float from the seat surface in front of the seat. Therefore, like the seat 1 according to the present embodiment, for example, when lowering the seat surface, by changing the front part of the seat cushion 2 to an ascending posture or the rear part of the seat cushion 2 to a descending posture, the thigh of the seated person can easily come into contact with the seat surface, and the fatigue of the seated person during driving can be reduced.

[0045] Furthermore, according to the present embodiment, the following operational effects can be achieved. (1) The seat 1 includes a seat cushion 2 that supports the buttocks of the occupant, an extension device 7 capable of changing the length of the seat cushion 2 in the front-rear direction, and a lifting device 6 capable of changing the height of the seat cushion 2. The seat cushion 2 includes a front panel 24 disposed at the front, and has a cushion frame 20 having a substantially rectangular shape in top view that forms the skeleton of the seat cushion 2. The extension device 7 has an extension portion 71 and a base portion 70 that is fixed to the front panel 24 via a pair of left and right metal brackets 74R and 74L and supports the extension portion 71 so as to be extendable forward. The lifting device 6 is provided inside each of the left and right side portions of the cushion frame 20 in the left-right direction, and has a pair of left and right front link portions 61R and 61L capable of lifting and lowering the front portion of the cushion frame 20. Each of the pair of left and right brackets 74R and 74L is disposed inside the left and right directions of each of the pair of left and right front link portions 61R and 61L in top view.

[0046] With this configuration, a pair of left and right brackets 74R and 74L that can support the upward load acting on the extension device 7 and a pair of left and right front link portions 61R and 61L that can move the front portion of the seat cushion 2 up and down can be arranged without interfering with each other. Therefore, the extension function and the lifting function can be provided without increasing the size of the seat cushion 2. As a result, the seated person on the seat 1 can assume an optimal driving posture, and the seated person can drive the vehicle comfortably. Also, for example, since the pair of left and right brackets 74R and 74L are formed of metal, the risk of damage or the like is reduced, and the upward load can be suitably transmitted to the metal front panel 24.

[0047] (2) In the seat 1 described in (1), the lifting device 6 is provided on one side in the left-right direction of the cushion frame 20, and further includes a front actuator 62 that drives the right front link portion 61R and a front pinion gear 63 that is rotatably supported by the right cushion frame 20. The right front link portion 61R is connected to the front actuator 62 via the front pinion gear 63. The right bracket 74R is preferably formed so that at least a part thereof overlaps with the front pinion gear 63 when viewed from above. For example, it is preferable that at least a part of the right extension portion 743R of the right bracket 74R overlaps with the front pinion gear 63. With this configuration, for example, since the right extension portion 743R protects the front pinion gear 63 from above, it is possible to suppress foreign matters such as the cushion pad 21 from entering the gaps between the gears or the meshing portions between the gears.

[0048] (3) In the sheet 1 described in (2), the lifting device 6 further has a gear cover 64 that covers at least a part of the right front link portion 61R. The right bracket 74R is formed so that at least a part of it overlaps with the gear cover 64 when viewed from above. With this configuration, for example, since the extension portion 743R protects the gear cover 64 from above, it is possible to prevent unnecessary loads from acting on the gear cover 64. As a result, damage to the gear cover 64 and the like can be suppressed, and it is possible to suppress foreign objects such as the cushion pad 21 from entering the gaps between the gears or the meshing portions of the gears.

[0049] (4) In the sheet 1 described in (3), the front panel 24 has a convex portion 24R that protrudes upward so as not to contact the gear cover 64 on the right side in the left - right direction where it overlaps with the gear cover 64 when viewed from above. With this configuration, for example, since the gear cover 64 is protected by the convex portion 24R, it is possible to prevent unnecessary loads from acting on the gear cover 64. As a result, damage to the gear cover 64 and the like can be suppressed, and it is possible to suppress foreign objects such as the cushion pad 21 from entering the gaps between the gears or the meshing portions of the gears.

[0050] (5) In the sheet 1 described in (4), the front panel 24 has a recess 24C in which the extension device 7 can be arranged, and the recess 24C is provided at approximately the center in the left - right direction. With this configuration, for example, even when the extension device 7 is provided, an increase in the thickness in the vertical direction can be suppressed from becoming unnecessarily large.

[0051] The above - described embodiment can be deformed into various forms. Hereinafter, modification examples will be described.

[0052] In the above - described embodiment, the extension portion 743R of the right bracket 74R is formed so that at least a part of it overlaps with the gear cover 64 when viewed from above. However, the present invention is not limited to this. For example, the extension portion 743R may be formed so as to cover at least a part of the front pinion gear 63 (rotating shaft member) when viewed from above.

[0053] Also, in this embodiment, the right front link portion 61R is configured to include the front link 611 and the sector link 612, but it may be configured with only the front link 611. In this case, the front link 611 may be connected to the front actuator 62 via a gear train, for example. Similarly, the left front link portion 61L is configured to include the front link 615 and the support link 616, but it may be configured with only the front link 615.

[0054] Also, in this embodiment, the extension device 7 for manually pulling out the extension portion 71 to increase the length (cushion length) of the seat cushion 2 has been described. However, the extension device 7 may be configured to pull out the extension portion 71 electrically, for example, or may be configured to control the movement operation of the extension portion 71 by a control unit.

[0055] The above description is merely an example, and the present invention is not limited to the above-described embodiments and modifications as long as the features of the present invention are not impaired. It is also possible to arbitrarily combine one or more of the above embodiments and modifications, and it is also possible to combine the modifications with each other.

Explanation of Reference Numerals

[0056] 1 Seat (vehicle seat), 2 Seat cushion, 3 Seat back, 6 Lifting device, 7 Extension device, 20 Cushion frame, 24 Front panel, 61R, 61L Pair of left and right front link portions, 70 Base portion, 71 Extension portion, 74R, 74L Pair of left and right brackets

Claims

1. The seat cushion includes a seat cushion that supports the buttocks of an occupant, an extension device that can change the length of the seat cushion in the front-rear direction, and a lifting device that can change the height of the seat cushion. the seat cushion includes a front panel disposed at a front portion, and a cushion frame having a generally rectangular shape in a top view that forms a skeleton of the seat cushion; The extension device includes an extension portion and a fixed support portion that is fixed to the front panel via a pair of left and right brackets and supports the extension portion so that the extension portion can extend forward. The lifting device includes a pair of left and right links provided on the inside of each of the left and right side portions of the cushion frame and capable of lifting and lowering a front portion of the cushion frame, The vehicle seat according to claim 1, wherein the pair of left and right brackets are disposed on the inner side in the left-right direction of the pair of left and right links, respectively, when viewed from above.

2. The vehicle seat according to claim 1, The lifting device further includes an actuator provided on one side of the cushion frame in the left-right direction and configured to drive one of the pair of left and right links, and a rotating shaft member rotatably supported on one side of the cushion frame in the left-right direction, the one link is connected to the actuator via the rotating shaft member, A vehicle seat, wherein one bracket corresponding to the one link is formed so as to at least partially overlap the rotating shaft member when viewed from above.

3. The vehicle seat according to claim 2, The lifting device further includes a cover member that covers at least a portion of the one link, The vehicle seat, wherein the one bracket is formed so as to overlap at least a portion of the cover member when viewed from above.

4. The vehicle seat according to claim 3, The vehicle seat according to claim 1, wherein the front panel has a protrusion that protrudes upward on one of the left and right sides that overlaps with the cover member when viewed from above so as not to come into contact with the cover member.

5. The vehicle seat according to any one of claims 1 to 4, the front panel has a recess in which the extension device can be disposed, The vehicle seat is characterized in that the recess is provided in approximately the center in the left-right direction.

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