Vehicle seats

Abstract

To provide a vehicular seat which can make an occupant sitting on a seat part being away from a side of a lateral collision.SOLUTION: A vehicular seat includes a seat part, and an inclination mechanism which is provided between the seat part and a floor of a vehicle and inclines the seat part. The inclination mechanism has a projection part projecting to outside from one end of the seat part in a width direction of the seat part, a contact part which is arranged so as to be brought into contact with a contact position of the lower surface of the seat part, and a conversion mechanism which connects between the projection part and the contact part, converts inward force from outside to inside in the width direction given to the projection part into upward force, and transmits the upward force to the contact position through the contact part. The contact position is positioned between a gravity center position in the width direction of the seat part and the projection part, in the width direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to vehicle seats. [Background technology]

[0002] Patent Document 1 discloses that when an impact is applied to the side wall panel, a lower portion of the inner trim engaged with the vehicle's side wall panel bends inward of the vehicle, and when the bent inner trim comes into contact with the side of the seat, an inclined portion inclined inward of the vehicle is formed above the side of the seat. With this configuration, when the vehicle is hit from the side by another vehicle, the bending of the inner trim can tilt the seat toward the interior of the vehicle, allowing the occupant sitting in the seat to move toward the inside of the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-46179 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology of Patent Document 1 requires designing the outer shape and contents of the inner trim so that it bends when an impact is applied, and designing the seat so that an inclined portion is formed in the seat. Thus, the technology of Patent Document 1 requires designing not only the seat but also the vehicle side wall panels so that the seat can be inclined toward the interior of the vehicle. [Means for solving the problem]

[0005] The present disclosure can be realized in the following forms.

[0006] (1) According to a first aspect of the present disclosure, there is provided a vehicle seat. The vehicle seat includes a seat portion and a tilting mechanism disposed between the seat portion and a vehicle floor and configured to tilt the seat portion. The tilting mechanism includes a protruding portion that protrudes outward beyond one end of the seat portion in a width direction of the seat portion, a contact portion that is positioned so as to be able to contact a contact position on the underside of the seat portion, and a conversion mechanism that connects the protruding portion and the contact portion, converts an inward force acting on the protruding portion from the outside to the inside in the width direction into an upward force, and transmits the upward force to the contact position via the contact portion. The contact position is located in the width direction between the center of gravity of the seat portion in the width direction and the protruding portion. With this configuration, when the vehicle is hit by a side collision from the protruding portion side, the tilting mechanism provided between the seat and the floor converts the inward force of the side collision applied to the protruding portion into an upward force, and the upward force can be transmitted to the contact position of the seat via the contact portion. By transmitting the upward force to the contact position via the contact portion, the seat can be tilted to the side opposite the protruding portion, and the occupant sitting in the seat can be moved away from the hit side. In this way, the tilting mechanism provided between the seat and the floor can move the occupant away from the hit side during a side collision. (2) In the above aspect, the conversion mechanism may include a first arm that is rotatably fixed to a fixed position arranged on the floor and extends upward from the fixed position toward the protruding portion in the width direction, and a second arm that is rotatably connected to the first arm via a connecting portion that includes the protruding portion, connects the connecting portion and the contact portion, and extends upward from the connecting portion toward the opposite side of the protruding portion in the width direction. With this aspect, the conversion mechanism can be easily configured. (3) In the above embodiment, the tip of the protrusion may be formed by a flat surface perpendicular to the width direction. In this embodiment, the protrusion can more effectively absorb an inward force caused by a side collision compared to when the tip of the protrusion is not formed by a flat surface. (4) In the above embodiment, the vehicle seat may further include a connecting portion provided between the seat and the floor and connecting the seat to the floor, the connecting portion including a first connecting member having a second engaging portion that engages with a first engaging portion provided on the seat, and a second connecting member that is disposed between the first connecting member in the width direction and the first connecting member across the center of gravity, connecting the seat to the floor, the first connecting member being disposed between the protruding portion and the center of gravity, and the first engaging portion and the second engaging portion being configured to disengage when the seat is tilted by the tilting mechanism. With this embodiment, it is possible to easily connect the seat to the floor by the connecting portion and tilt the seat to the opposite side of the protruding portion by the tilting mechanism in the event of a side collision. (5) In the above embodiment, the first connecting member and the second connecting member may each be configured as a slide rail extending along the front-rear direction of the seat, and the connecting portion may connect the seat to the floor by the first connecting member and the second connecting member so that the seat can slide along the front-rear direction relative to the floor. In this embodiment, the seat can be slid in the front-rear direction by the connecting portion, thereby improving the convenience of the vehicle seat.

[0007] The present disclosure can be realized in various forms other than the above-described vehicle seat, such as a vehicle equipped with a vehicle seat. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a first front view showing a schematic configuration of a vehicle seat according to a first embodiment. [Figure 2] FIG. 2 is a second front view showing a schematic configuration of the vehicle seat according to the first embodiment. [Figure 3] 1 is a side view showing a vehicle seat according to a first embodiment. [Figure 4] FIG. 10 is a first front view showing a schematic configuration of a vehicle seat according to a second embodiment. [Figure 5] FIG. 10 is a side view of a vehicle seat according to a second embodiment. [Figure 6] FIG. 10 is an explanatory diagram showing a first engagement portion and a second engagement portion in a second embodiment. [Figure 7] FIG. 10 is a second front view showing a schematic configuration of the vehicle seat according to the second embodiment. [Figure 8] 10A and 10B are explanatory views showing examples of a first engaging portion and a second engaging portion in another embodiment. [Figure 9] FIG. 10 is a diagram illustrating a first tilting mechanism in the third embodiment. [Figure 10] FIG. 10 is a diagram illustrating a first tilting mechanism in the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] A. First embodiment: FIG. 1 is a first front view showing a schematic configuration of a vehicle seat 100 according to a first embodiment. FIG. 1 shows arrows along mutually orthogonal X, Y, and Z directions. The X, Y, and Z directions are directions along three mutually orthogonal spatial axes, namely, the X-axis, the Y-axis, and the Z-axis, and each direction includes both a direction toward one side of the X-axis, the Y-axis, and the Z-axis, and an opposite direction. The X-axis is a coordinate axis along the left-right direction of the vehicle seat 100, and the arrow representing the X-axis points to the right. The Y-axis is a coordinate axis along the front-rear direction of the vehicle seat 100, and the arrow representing the Y-axis points to the rear. The Z-axis is a coordinate axis along a vertical line, and the arrow representing the Z-axis points upward. The X, Y, and Z directions in FIG. 1 and the X, Y, and Z directions in other figures represent the same directions. Hereinafter, the left-right direction will also be referred to as the "width direction of the vehicle seat 100" or simply as the "width direction." The +Z direction is also called "up" and the -Z direction is called "down."

[0010] FIG. 1 shows an occupant Cr seated in a vehicle seat 100 arranged in a vehicle Va. In this embodiment, the vehicle Va is configured as a BEV (Battery Electric Vehicle) powered by a drive battery. More specifically, the vehicle Va is configured as a battery-powered, one-seater, low-speed electric vehicle (LSEV). In this embodiment, the front-to-rear direction of the vehicle Va and the front-to-rear direction of the vehicle seat 100 are the same, and the width direction of the vehicle Va and the width direction of the vehicle seat 100 are the same.

[0011] The occupant Cr in this embodiment is a driver who drives the vehicle Va, and drives the vehicle Va using, for example, a steering wheel (not shown) provided on the vehicle Va. That is, the vehicle seat 100 in this embodiment is configured as a driver's seat. In this embodiment, openings are formed on the right and left sides of the vehicle Va as boarding and alighting sections for the occupant Cr to get in and out of the vehicle Va. In this embodiment, these boarding and alighting sections are not provided with opening and closing doors, but opening and closing doors may be provided. Members that constitute the side walls of the vehicle Va, such as opening and closing doors, are also called side wall panels.

[0012] In other embodiments, the number of occupants of the vehicle Va may be any number. Furthermore, the vehicle Va may be, for example, a BEV (Bike Electric Vehicle) different from an LSEV, a gasoline-powered vehicle, a diesel-powered vehicle, a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), or a fuel cell vehicle (FCV). Furthermore, the vehicle seat 100 does not have to be configured as a driver's seat, and may be configured as, for example, a passenger seat or a rear seat.

[0013] The vehicle seat 100 includes a seat portion 20, a first tilting mechanism 30, and a second tilting mechanism 90. The first tilting mechanism 30 and the second tilting mechanism 90 are disposed between a floor Fr of the vehicle Va and the seat portion 20. Hereinafter, the first tilting mechanism 30 will also be simply referred to as the tilting mechanism.

[0014] The seat 20 in this embodiment includes a seating surface 21 that supports the buttocks of the occupant Cr, a seat back 22 that supports the back of the occupant Cr, a headrest 23 that is positioned behind the head of the occupant Cr, and a support portion 26 that supports the seating surface 21 from below. The seating surface 21 and the headrest 23 are connected via the seat back 22. The support portion 26 includes a support plate 27 that has a flat plate shape along the X and Y directions, and a pair of legs Lg that connect the support plate 27 to the seating surface 21. Hereinafter, the ends of the seat 20 in the X direction will be referred to as one end 24 and the other end 25, respectively. In this embodiment, the one end 24 is the right end of the seat 20, and the other end 25 is the left end of the seat 20. In this embodiment, the one end 24 and the other end 25 are each formed by the end of the support plate 27 in the X direction.

[0015] The first tilt mechanism 30 and the second tilt mechanism 90 are disposed with the center of gravity PG between them. More specifically, in this embodiment, the first tilt mechanism 30 and the second tilt mechanism 90 are disposed symmetrically with respect to the center of gravity PG. The configuration of the second tilt mechanism 90 is substantially the same as the configuration of the first tilt mechanism 30 with the left and right reversed.

[0016] 1, the first tilt mechanism 30 has a first protrusion 40, a first contact portion 50, and a first conversion mechanism 60. The second tilt mechanism 90 has a second conversion mechanism 91, a second protrusion 95, and a second contact portion 94.

[0017] The first protrusion 40 protrudes outward in the width direction beyond one end 24 of the seat section 20. The second protrusion 95 protrudes outward in the width direction beyond the other end 25 of the seat section 20. In this embodiment, a first tip 41, which is the outer end of the first protrusion 40, constitutes the right end of the first tilting mechanism 30. A second tip 96, which is the outer end of the second protrusion 95, constitutes the left end of the second tilting mechanism 90. Hereinafter, the first protrusion 40 will also be simply referred to as a protrusion.

[0018] As will be described later, the first tilting mechanism 30 is configured to be able to tilt the seat 20 to the side opposite the first protrusion 40. The state in which the seat 20 is tilted to the side opposite the first protrusion 40 is also referred to as the first tilted state. That is, in the first tilted state in this embodiment, the upper part of the seat 20 tilts in the -X direction. Similarly to the first tilting mechanism 30, the second tilting mechanism 90 is configured to be able to tilt the seat 20 to the side opposite the second protrusion 95. The state in which the seat 20 is tilted to the side opposite the second protrusion 95 is also referred to as the second tilted state. That is, in the second tilted state in this embodiment, the upper part of the seat 20 tilts in the +X direction. The state in which the seat 20 is not tilted by the first tilting mechanism 30 or the second tilting mechanism 90 is also referred to as the normal state. FIG. 1 shows the seat 20 in the normal state. Hereinafter, unless otherwise specified, descriptions of the structure and arrangement of the vehicle seat 100 refer to the structure and arrangement in the normal state.

[0019] FIG. 2 is a second front view showing a schematic configuration of the vehicle seat 100. FIG. 2 shows the vehicle seat 100 in the first inclined state. The first tilting mechanism 30 is configured to be able to place the seat portion 20 in the first inclined state when an inward force FL is applied to the first protrusion 40, more specifically, to the first tip 41. This inward force FL is a force directed from the outside to the inside in the width direction. The force FL is applied to the first protrusion 40, for example, when the vehicle Va is subjected to a side collision with another vehicle Vb. In this embodiment, the direction of the force FL is to the left.

[0020] The first contact portion 50 is arranged so as to be able to come into contact with a first contact position P1 of the seat portion 20. The first contact position P1 is a position on the underside Us of the seat portion 20 in the X direction between the center of gravity PG in the width direction of the seat portion 20 and the one end 24. The center of gravity position PG refers to the position of the center of gravity of the seat portion 20 in the X direction. In this embodiment, the center of gravity position PG is a position that bisects the one end 24 and the other end 25. In this embodiment, the underside Us of the seat portion 20 is formed by the underside of the support plate 27 described above. The second contact portion 94 is arranged so as to be able to come into contact with a second contact position P2 of the seat portion 20. The second contact position P2 is a position on the underside Us between the center of gravity PG of the seat portion 20 and the other end 25 in the X direction. Hereinafter, the first contact portion 50 will also be simply referred to as the contact portion, and the first contact position P1 will also be simply referred to as the contact position.

[0021] The first conversion mechanism 60 connects between the first protrusion 40 and the first contact portion 50. As shown in FIG. 2 , when a force FL is applied to the first tip 41 of the first protrusion 40, the first conversion mechanism 60 converts the force FL into an upward force FU and transmits the force FU to the first contact position P1 via the first contact portion 50. In this embodiment, as will be described later, the first protrusion 40 and the first contact portion 50 are each configured as part of the first conversion mechanism 60. Hereinafter, the first conversion mechanism 60 will also be simply referred to as a conversion mechanism. Note that in this embodiment, the configuration of the second conversion mechanism 91 is substantially the same as the configuration of the first conversion mechanism 60 with the left and right sides reversed.

[0022] 1, in this embodiment, the first conversion mechanism 60 is configured as a link mechanism that is extendable and contractible along the Z direction, and includes a first arm 61, a second arm 62, and a first connecting portion 63. More specifically, the first conversion mechanism 60 in this embodiment is configured as a pantograph-type link mechanism, and further includes a first link portion 70, a third arm 71, a fourth arm 72, and a second link portion 74. Hereinafter, the first connecting portion 63 will also be simply referred to as the connecting portion.

[0023] The first arm 61 is rotatably fixed to a fixed position 101 disposed on the floor Fr. More specifically, in this embodiment, the fixed position 101 is configured as the right end of a first link portion 70 fixed to the floor Fr along the X direction. The first arm 61 extends upward from the fixed position 101 toward the first tip 41 in the X direction. That is, in this embodiment, the first arm 61 extends from the fixed position 101 toward the upper right.

[0024] The first connecting portion 63 includes the above-described first protrusion 40 and connects the first arm 61 and the second arm 62. In the present embodiment, the first connecting portion 63 has a joint 64 and a plate-shaped member 65. The joint 64 is configured as a revolute pair that connects the first arm 61 and the second arm 62. The plate-shaped member 65 is disposed on the right side of the joint 64 and is fixed to the joint 64. In the present embodiment, the joint 64 and the plate-shaped member 65 function as the first protrusion 40. Note that in other embodiments, for example, the joint 64 may not function as the first protrusion 40. In other words, of the first connecting portion 63, only the plate-shaped member 65 may be disposed outside the one end 24, and the joint 64 may be disposed inside the one end 24.

[0025] FIG. 3 is a side view showing the vehicle seat 100. FIG. 3 simply shows the vehicle seat 100 as viewed from the right side along the +X direction. As shown in FIGS. 1 to 3, in this embodiment, the right plate surface of the plate-shaped member 65 forms the first tip 41. As a result, the first tip 41 is formed by a plane perpendicular to the width direction. In other words, the first protruding portion 40 has a plane perpendicular to the width direction on its outer side. More specifically, as shown in FIG. 3, the first tip 41 has a planar shape that is elongated in the Y direction and extends along the X and Y directions. In this embodiment, the length of the first tip 41 in the Y direction is equal to or greater than the length of the seat portion 20 in the Y direction. In other embodiments, the length of the first tip 41 in the Y direction may be shorter than the length of the seat portion 20 in the Y direction. Note that in this embodiment, the configuration of the second protruding portion 95 is substantially the same as the configuration of the first protruding portion 40 when the left and right sides are reversed. Therefore, like the first tip 41, the second tip 96 is formed by a plane perpendicular to the width direction.

[0026] 1, the second arm 62 is connected to the first arm 61 via a first connecting portion 63. The second arm 62 connects the first connecting portion 63 and the first contact portion 50, and extends upward from the first connecting portion 63 toward the opposite side of the first tip 41 in the X direction. That is, in this embodiment, the second arm 62 extends from the first connecting portion 63 toward the upper left.

[0027] The third arm 71 is disposed on the opposite side of the first arm 61 with the first link unit 70 interposed therebetween. The configuration of the third arm 71 is generally similar to the configuration of the first arm 61 with the left and right reversed. More specifically, the third arm 71 is rotatably fixed to the left end of the first link unit 70 and extends toward the upper left. The fourth arm 72 is disposed on the opposite side of the first link unit 70 from the second arm 62. The configuration of the fourth arm 72 is generally similar to the configuration of the second arm 62 with the left and right reversed. More specifically, the fourth arm 72 is rotatably connected to the third arm 71 and extends toward the upper right.

[0028] In this embodiment, the upper end of the second arm 62 and the upper end of the fourth arm 72 are linearly connected by a second link portion 74. More specifically, the second arm 62 and the fourth arm 72 are each rotatably connected to the second link portion 74. A spacer 78 is fixed to the underside of the second arm 62 to prevent direct contact between the first link portion 70 and the second link portion 74. In this embodiment, when the first conversion mechanism 60 is in the most retracted state, the lower side of the spacer 78 contacts the upper side of the first link portion 70, and the upper side of the spacer 78 contacts the lower side of the second link portion 74.

[0029] In this embodiment, the first contact portion 50 is included in the second link portion 74. More specifically, the first contact portion 50 is configured by the upper end portion of the second link portion 74. In this embodiment, the second link portion 74 is fixed to the lower surface of the support plate 27 with the first contact portion 50 in contact with the first contact position P1. The second contact portion 94, like the first contact portion 50, is configured by the upper end portion of the third link portion 92 of the second conversion mechanism 91. The configuration of the third link portion 92 is substantially the same as the configuration of the second link portion 74 with the left and right reversed. The third link portion 92 is fixed to the lower surface of the support plate 27 with the second contact portion 94 in contact with the second contact position P2. Therefore, in this embodiment, it can be said that the seat portion 20 is supported from below by the first tilting mechanism 30 and the second tilting mechanism 90.

[0030] As described above, the first protrusion 40 protrudes outward beyond the one end 24 of the seat 20. Therefore, when the vehicle Va is side-collided from the right by another vehicle Vb, the first protrusion 40 can receive the inward force FL due to the side collision before the seat 20. As shown in FIG. 2 , when the force FL is applied to the first protrusion 40, the first connecting portion 63 is pushed in the −X direction, and the first arm 61 and the second arm 62, which are rotatably connected to each other via the first connecting portion 63, open in the vertical direction. At this time, because the first arm 61 is fixed at the fixed position 101, the first conversion mechanism 60 extends upward as a whole, and the first contact position P1 is pushed upward by the first contact portion 50 connected to the second arm 62. In other words, when a force FL is applied to the first protrusion 40, the first conversion mechanism 60 converts the force FL into a force FU by pushing the first contact position P1 upward with the first tip 41 as the force point, the fixed position 101 as the fulcrum, and the first contact portion 50 as the point of action, and applies the force FU to the first contact position P1 via the first contact portion 50. Then, as shown in FIG. 2 , the force FU applied to the first contact position P1 lifts the portion of the seat 20 to the right of the center of gravity position PG higher than the portion to the left, causing the seat 20 to tilt away from the first protrusion 40. In this way, the occupant Cr seated in the seat 20 can be moved away from the first protrusion 40.

[0031] Although not shown, the second tilting mechanism 90, in contrast to the first tilting mechanism 30, can tilt the seat 20 to the side opposite the second protrusion 95 in the event of a side collision from the left. More specifically, when the vehicle Va is side-collided from the left, the second protrusion 95, which protrudes outward from the other end 25 of the seat 20, can receive the rightward force of the side collision before the seat 20. When the second protrusion 95 receives the rightward force, the second conversion mechanism 91 extends upward as a whole, substantially similar to the first conversion mechanism 60, and the second contact portion 94 pushes the second contact position P2 of the seat 20 upward. When the second contact position P2 is pushed upward, an upward force is applied to the second contact position P2, and the portion of the seat 20 to the left of the center of gravity position PG is lifted higher than the portion to the right. In this way, the second tilting mechanism 90 can tilt the seat portion 20 to the side opposite the second protrusion 95, and can move the occupant Cr seated in the seat portion 20 away from the second protrusion 95 side.

[0032] The vehicle seat 100 according to the present embodiment described above includes the first tilting mechanism 30 provided between the seat 20 and the floor Fr. The first tilting mechanism 30 converts an inward force FL applied to the first protrusion 40 into an upward force FU by the first conversion mechanism 60, and applies the force FU to the first contact position P1 via the first contact portion 50. With this configuration, when the vehicle Va is side-collided by another vehicle Vb from the side of the first protrusion 40, the first protrusion 40 receives the inward force FL due to the side collision, and the seat 20 can be tilted to the side opposite the first protrusion 40. Therefore, the first tilting mechanism 30 provided between the seat 20 and the floor Fr can move the occupant Cr seated in the seat 20 away from the impacted side during a side collision. Therefore, since it is not necessary to provide a structure for tilting the seat portion 20 to the side wall panel, it is possible to improve the protection performance of the occupant Cr while adopting a structure in which opening and closing doors are not provided at the ingress / egress sections formed on the left and right sides of the vehicle seat 100, as in the present embodiment. Note that by adopting a structure in which opening and closing doors are not provided as in the present embodiment, it is possible to reduce the weight and manufacturing costs of the vehicle Va, for example. Furthermore, even when opening and closing doors are provided on the left and right sides of the vehicle seat 100, it is possible to increase the degree of freedom in design. Furthermore, in the present embodiment, since a sensor for detecting contact between the vehicle Va and another vehicle is not required to operate the first tilting mechanism 30, it is more likely that the vehicle Va and the vehicle seat 100 can be simply configured. Therefore, it is more likely that the manufacturing costs of the vehicle Va and the vehicle seat 100 can be reduced.

[0033] Moreover, in this embodiment, the first conversion mechanism 60 has a first arm 61 that is rotatably fixed to a fixed position 101 arranged on the floor Fr and extends upward from the fixed position 101 toward the first tip 41, and a second arm 62 that is rotatably connected to the first arm 61 via a first connecting portion 63 that includes the first tip 41, connects the first connecting portion 63 to the first contact portion 50, and extends upward from the first connecting portion 63 toward the opposite side of the first tip 41. With this configuration, the first conversion mechanism 60 can be easily configured.

[0034] In this embodiment, the first tip 41 is configured as a plane perpendicular to the width direction. In this configuration, the first protrusion 40 can more effectively receive the inward force FL due to a side collision, compared to when the first tip 41 is not configured as a plane.

[0035] B. Second embodiment: FIG. 4 is a first front view showing a schematic configuration of a vehicle seat 100b in the second embodiment. FIG. 5 is a side view of the vehicle seat 100b. Like FIG. 1, FIGS. 4 and 5 show the vehicle seat 100b in a normal state. Like FIG. 3, FIG. 5 simply shows the vehicle seat 100b as seen from the right side. Unlike the first embodiment, the vehicle seat 100b in this embodiment includes a connection portion 80. Portions of the configuration of the vehicle seat 100b in the second embodiment that are not particularly described are the same as those in the first embodiment.

[0036] In this embodiment, the seat portion 20b does not have a support portion 26. Therefore, the lower surface Us of the seat portion 20b is formed by the lower surface of the seat cushion portion 21. Furthermore, in this embodiment, the first contact portion 50b is disposed away from the first contact position P1 in the normal state. Similarly, in this embodiment, the second contact portion 94b is disposed away from the second contact position P2 in the normal state. Therefore, in this embodiment, the seat portion 20b is not supported by the first tilting mechanism 30 and the second tilting mechanism 90.

[0037] 4 and 5, the connection part 80 is provided between the seat part 20b and the floor Fr. The connection part 80 connects the seat part 20b to the floor Fr.

[0038] As shown in FIG. 4 , the connection unit 80 has a first connection member 81 and a second connection member 86. The second connection member 86 is disposed between the first connection member 81 and the first connection member 81 in the X direction, with the center of gravity PG sandwiched therebetween. That is, in the X direction, the center of gravity PG of the seat portion 20b is located between the first connection member 81 and the second connection member 86. Furthermore, the first connection member 81 is disposed between the first protrusion 40 and the center of gravity PG in the X direction. More specifically, the first connection member 81 is disposed more inwardly than the first tilting mechanism 30 in the width direction. Similarly, the second connection member 86 is disposed between the second protrusion 95 and the center of gravity PG in the X direction, and more inwardly than the second tilting mechanism 90 in the width direction. That is, the connection unit 80 is disposed between the first tilting mechanism 30 and the second tilting mechanism 90 in the X direction.

[0039] In this embodiment, the first connecting member 81 and the second connecting member 86 are each configured as a slide rail extending along the front-rear direction. The connecting portion 80 connects the seat portion 20b to the floor Fr via the first connecting member 81 and the second connecting member 86 so that the seat portion 20b can slide along the front-rear direction relative to the floor Fr. In this embodiment, the seat portion 20b slides in the front-rear direction relative to the floor Fr, and thereby also slides in the front-rear direction relative to the first tilting mechanism 30 and the second tilting mechanism 90 fixed to the floor Fr. Note that the connecting portion 80 may have, for example, a locking mechanism that locks the sliding movement of the seat portion 20b. In this case, the locking mechanism may be connected to, for example, a lever or the like that can be operated by the occupant Cr, and configured so that the seat portion 20b can be locked and unlocked by operating the lever.

[0040] As shown in FIGS. 4 and 5 , the first connecting member 81 has a second engaging portion 82 that engages with the first engaging portion 28. The first engaging portion 28 is provided on the seat 20b. More specifically, the first engaging portion 28 is fixed to a portion of the underside Us between the first contact position P1 and the center of gravity position PG. The first connecting member 81 connects the seat 20b to the floor Fr by engaging the second engaging portion 82 with the first engaging portion 28. In this embodiment, the second engaging portion 82 is configured as an upper end portion of the first connecting member 81 as a slide rail, and is configured to allow the first engaging portion 28 to slide in the front-rear direction while remaining engaged with the second engaging portion 82. For example, a roller or a bearing may be disposed between the first engaging portion 28 and the second engaging portion 82 to smoothly slide the first engaging portion 28 relative to the second engaging portion 82. In this embodiment, the length in the Y direction of the first tip 41 configured as a plane along the X direction and the Y direction is equal to or greater than the length in the Y direction of the first connecting member 81 and the second connecting member 86.

[0041] FIG. 6 is an explanatory diagram showing the first engagement portion 28 and the second engagement portion 82 in the second embodiment. As shown in FIG. 6, the first connection member 81 in this embodiment has a concave shape that opens upward when viewed along the Y direction. Upper end portions 83 of walls arranged on both sides of the opening Op of the first connection member 81 in the X direction are folded inward to extend along the X direction, forming overhang portions 84 that overhang the opening Op. These overhang portions 84 function as the second engagement portion 82. As shown in FIGS. 4 and 5, the first engagement portion 28 is fixed to the seat portion 20b via legs 102 fixed to the underside Us of the seat portion 20b. The legs 102 have a width w1 that is smaller than the distance d between the overhang portions 84 in the X direction and are disposed between the two overhang portions 84. The first engagement portion 28 has a width w2 that is larger than the distance d in the X direction and is disposed within the opening Op.

[0042] As shown in FIG. 4 , the second connecting member 86 in this embodiment has a fourth engaging portion 87 that engages with the third engaging portion 29. The third engaging portion 29 is fixed to a portion of the lower surface Us between the second contact position P2 and the center of gravity position PG. The second connecting member 86 in this embodiment connects the seat portion 20b and the floor Fr by engaging the fourth engaging portion 87 with the third engaging portion 29. The fourth engaging portion 87 is configured as the upper end of the second connecting member 86 as a slide rail, and is configured so that the third engaging portion 29 can slide in the front-rear direction while remaining engaged with the fourth engaging portion 87. In this embodiment, the configuration of the third engaging portion 29 is substantially the same as that of the first engaging portion 28. Furthermore, the configuration of the fourth engaging portion 87 is substantially the same as that of the second engaging portion 82.

[0043] FIG. 7 is a second front view showing a schematic configuration of the vehicle seat 100b. Like FIG. 2, FIG. 7 shows the vehicle seat 100b in the first inclined state. The first engagement portion 28 and the second engagement portion 82 are configured to disengage when the seat portion 20b is tilted toward the side opposite the first protrusion 40 by the first tilting mechanism 30. Therefore, in FIG. 7, the engagement between the first engagement portion 28 and the second engagement portion 82 is disengaged. More specifically, the engagement between the first engagement portion 28 and the second engagement portion 82 is disengaged when the first tilting mechanism 30 applies an upward force FU to the first contact position P1, pushing up the portion of the seat portion 20b to the right of the center of gravity position PG higher than the portion to the left. The first engagement portion 28 and the second engagement portion 82 are configured to disengage when an inward force FL equal to or greater than a predetermined reference value is applied to the first tip 41, and not to disengage when the force FL is less than the reference value. In this case, the reference value is determined based on the results of simulations or experiments as the magnitude of the force applied to the first tip 41 when the vehicle Va is hit from the side by another vehicle Vb. In this embodiment, the third engagement portion 29 and the fourth engagement portion 87 are also configured, similarly to the first engagement portion 28 and the second engagement portion 82, to disengage when the seat portion 20b is tilted to the side opposite the second protrusion 95 by the second tilting mechanism 90.

[0044] In the present embodiment, the magnitude of the force FL with which the first engagement portion 28 and the second engagement portion 82 are disengaged, i.e., the ease with which the first engagement portion 28 and the second engagement portion 82 are disengaged, can be adjusted by adjusting the distance d, width w2, thickness t1 of the first engagement portion 28 in the Z direction, and thickness t2 of the overhang portion 84 in the Z direction, as shown in FIG. 6 . For example, by reducing the difference between the distance d and the width w2, the engagement between the first engagement portion 28 and the second engagement portion 82 is more easily disengaged. Furthermore, by reducing the thickness t1, when the portion of the seat portion 20b to the right of the center of gravity position PG is pushed up, both ends of the first engagement portion 28 in the X direction are more easily deformed to bend downward, making it more easy to disengage the first engagement portion 28 and the second engagement portion 82. Furthermore, by reducing the thickness t2, when the portion of the seat portion 20b to the right of the center of gravity PG is pushed up, the overhang portion 84 is more likely to deform so as to open upward, making it easier to disengage the first engagement portion 28 from the second engagement portion 82. The ease with which the engagement between the first engagement portion 28 and the second engagement portion 82 disengages may be adjusted by appropriately adjusting the material from which the first engagement portion 28 and the second engagement portion 82 are formed. For example, by forming the first engagement portion 28 and the second engagement portion 82 from a material that is more easily elastically deformable, the engagement between the first engagement portion 28 and the second engagement portion 82 is more easily disengaged. The ease with which the engagement between the third engagement portion 29 and the fourth engagement portion 87 disengages may be adjusted in the same manner as described above.

[0045] The vehicle seat 100b according to the second embodiment described above includes a connection portion 80 that connects the seat portion 20 to the floor Fr. The connection portion 80 includes a first connection member 81 having a second engagement portion 82 that engages with the first engagement portion 28 provided on the seat portion 20b, and a second connection member 86 that is disposed between the first connection member 81 and the first connection member 81 in the width direction, with the center of gravity position PG sandwiched therebetween. The first connection member 81 is disposed between the first protrusion 40 and the center of gravity position PG. The first engagement portion 28 and the second engagement portion 82 are configured to be disengaged when the seat portion 20b is tilted by the first tilting mechanism 30 toward the side opposite the first protrusion 40. This configuration makes it easy to connect the seat portion 20b to the floor Fr using the connection portion 80 and to tilt the seat portion 20b toward the side opposite the first protrusion 40 using the first tilting mechanism 30 during a side collision.

[0046] In this embodiment, the first connecting member 81 and the second connecting member 86 are each configured as a slide rail extending along the front-rear direction, and the connecting portion 80 connects the seat portion 20b to the floor Fr by the first connecting member 81 and the second connecting member 86 so that the seat portion 20b is slidable along the front-rear direction relative to the floor Fr. With this configuration, the seat portion 20b can be slid in the front-rear direction by the connecting portion 80, thereby improving the convenience of the vehicle seat 100b.

[0047] In addition, when the seat section 20b is configured to be slidable in the front-rear direction relative to the first tilting mechanism 30 as in this embodiment, for example, the shape and number of the first tilting mechanisms 30 are set so that the first tilting mechanisms 30 can place the seat section 20 in the first tilted state when an inward force FL is applied, regardless of the position of the seat section 20 in the front-rear direction. For example, when the movable range of the seat section 20b in the front-rear direction is set relatively wide, two or more first tilting mechanisms 30 may be arranged side by side along the Y direction, or the dimension of the first tip 41 in the Y direction and the dimension of the first contact portion 50 in the Y direction may be made longer. Furthermore, for example, when two or more first tilting mechanisms 30 are arranged side by side along the Y direction, a plate-shaped member connecting the first tilting mechanisms 30 to each other may be arranged on the right side of each first tilting mechanism 30, and this plate-shaped member may function as the first protrusion 40 of each first tilting mechanism 30. Even in a configuration in which the seat portion 20b is not configured to be slidable, for example, two or more first tilting mechanisms 30 may be arranged side by side along the Y direction as described above. The second tilting mechanism 90 may also be configured in the same manner as described above. In other embodiments, for example, the first tilting mechanism 30 and the second tilting mechanism 90 may be configured to be slidable together with the seat portion 20b.

[0048] FIG. 8 is an explanatory diagram showing an example of the first engagement portion 28b and the second engagement portion 82b in another embodiment. Unlike the second embodiment, the underside of each overhang portion 84b of the second engagement portion 82b shown in FIG. 8 is configured as an inclined surface 85. The inclined surface 85 is inclined so that its height in the Z direction increases as it moves toward the inside of the opening Op in the X direction. This causes the overhang portion 84b to be configured so that its thickness in the Z direction decreases as it moves toward the inside of the opening Op in the X direction. This configuration of the second engagement portion 82b also makes it easier for the overhang portion 84 to deform and open upward when the portion of the seat 20b to the right of the center of gravity PG is pushed up. This makes it easier for the first engagement portion 28b and the second engagement portion 82b to be disengaged. In this case, by configuring the overhang portion 84b so that the overall thickness of the overhang portion 84b is reduced and the thickness gradually decreases toward the inside of the opening Op, the engagement between the first engagement portion 28b and the second engagement portion 82b becomes more likely to be released. Also, in the example of FIG. 8, the upper surfaces of both ends of the first engagement portion 28b in the X direction are configured as surfaces inclined along the inclined surfaces 85, unlike the second embodiment. By configuring the first engagement portion 28b in this manner, the gap between the first engagement portion 28b and the second engagement portion 82b can be made smaller, for example, compared to when the upper surface of the first engagement portion 28b is configured flat. Note that in other embodiments, for example, the lower surface of the second engagement portion 82b may be configured as the inclined surface 85, and the upper surface of the first engagement portion 28b may be configured flat, as in the second embodiment.

[0049] C. Third embodiment: FIG. 9 is a diagram illustrating the first tilting mechanism 30b in the third embodiment. In addition to the first tilting mechanism 30b, a second tilting mechanism 90b is also shown in FIG. 9. More specifically, FIG. 9 shows the first tilting mechanism 30b and the second tilting mechanism 90b in the normal state. Furthermore, FIG. 9 shows only the seat cushion 21 of the seat 20b, which is configured similarly to the second embodiment. In this embodiment, unlike the first and second embodiments, the first conversion mechanism 60b of the first tilting mechanism 30b is not configured as a link mechanism, but is configured as a gear mechanism that converts an inward force into an upward force using a gear. Portions of the configuration of the vehicle seat 100c in the third embodiment that are not specifically described are similar to those in the second embodiment.

[0050] The first conversion mechanism 60b has a first shaft 111, a second shaft 112, a first gear 113, a second gear 114, and a first fixed member 115. The configuration of the second conversion mechanism 91b is substantially the same as the configuration of the first conversion mechanism 60b with the left and right reversed.

[0051] The first fixing member 115 has a first portion 116 and a second portion 117. The first portion 116 has a flat plate shape extending along the X and Y directions and is fixed to the floor Fr. The second portion 117 has a flat plate shape extending along the Y and Z directions and stands upward from the end of the first portion 116 on the +X direction side.

[0052] The first shaft 111 has an axial shape along the X direction. The first shaft 111 is disposed so as to penetrate the second portion 117 of the first fixing member 115 in the X direction, and is supported by the second portion 117 so as to be slidable along the X direction. A plate-like member 65 similar to that in the first embodiment is fixed to the end of the first shaft 111 on the +X direction side. The plate-like member 65 functions as the first protrusion 40b, similar to that in the first embodiment.

[0053] The first shaft 111 is configured as a ball screw and has a portion in at least a portion of its axial direction where a screw groove is formed on the outer circumferential surface. A ball screw nut is connected to the portion of the first shaft 111 where the screw groove is formed, and a first gear 113 is attached to the outer periphery of the ball screw nut. The first gear 113 is configured as a bevel gear and is arranged so that the surface on which gear teeth are formed faces the −X direction and the surface on the +X direction side where no gear teeth are formed contacts the surface on the −X direction side of the second portion 117. Grease, for example, may be applied between the first gear 113 and the second portion 117.

[0054] The second shaft 112 has an axial shape along the Z direction. The second shaft 112 is disposed in the −X direction of the second portion 117 of the first fixing member 115. The second shaft 112 is disposed to penetrate the first portion 116 in the Z direction, and is supported by the first portion 116 so as to be slidable along the Z direction. The upper end of the second shaft 112 forms a first contact portion 50c.

[0055] Like the first shaft 111, the second shaft 112 is configured as a ball screw and has a portion in at least a portion of its axial direction where a screw groove is formed on the outer circumferential surface. A ball screw nut is connected to the portion of the second shaft 112 where the screw groove is formed, and a second gear 114 is attached to the outer periphery of the ball screw nut. The second gear 114 is configured as a bevel gear and is arranged so that the surface on which gear teeth are formed faces the +Z direction and so that the surface on the -Z direction side where no gear teeth are formed contacts the surface on the +Z direction side of the first portion 116. Grease, for example, may be applied between the second gear 114 and the first portion 116.

[0056] The first gear 113 and the second gear 114 are arranged so that the gear teeth of the second gear 114 mesh with the gear teeth of the first gear 113. As a result, movement of the first shaft 111 along the X direction causes the first gear 113 to rotate, the rotation of the first gear 113 causes the second gear 114 to rotate, and the rotation of the second gear 114 causes the second shaft 112 to move along the Z direction. In this embodiment, the directions of the screw grooves of the first shaft 111 and the second shaft 112, the meshing positions of the first gear 113 and the second gear 114, and the like are set so that when the first shaft 111 moves in the -X direction, the second shaft 112 moves in the +Z direction.

[0057] In this embodiment, when the first protrusion 40b receives a leftward force, the first shaft 111 is pushed in the -X direction, causing the first gear 113 to rotate. The rotation of the first gear 113 rotates the second gear 114, and the second shaft 112, to which the second gear 114 is attached, moves in the +Z direction. As the second shaft 112 moves in the +Z direction, the first contact portion 50c pushes the first contact position P1 upward, and an upward force is applied to the first contact position P1. In this way, the first conversion mechanism 60b converts the leftward force applied to the first protrusion 40b into an upward force by the first shaft 111, the second shaft 112, the first gear 113, and the second gear 114, and transmits the upward force to the first contact position P1 via the first contact portion 50c. In addition, the second tilting mechanism 90b, similar to the first tilting mechanism 30b, converts the rightward force applied to the second protrusion 95b into an upward force by the second conversion mechanism 91b, and applies this upward force to the second contact position P2 via the second contact portion 94c.

[0058] In the third embodiment described above, the first conversion mechanism 60b can also convert the inward force applied to the first protrusion 40b into an upward force and transmit it to the first contact portion 50c. The first tilting mechanism 30b can then apply this upward force to the first contact position P1, thereby tilting the seat 20b to the side opposite the first protrusion 40b. Therefore, in the present embodiment, too, the first tilting mechanism 30b provided between the seat 20b and the floor Fr can move the occupant Cr seated in the seat 20b away from the impacted side in the event of a side collision.

[0059] In other embodiments, when the first conversion mechanism 60b and the second conversion mechanism 91b are configured as gear mechanisms, the first tilting mechanism 30b and the second tilting mechanism 90b may be configured to support the seat 20b in the normal state, as in the first embodiment. Furthermore, when the first conversion mechanism 60b and the second conversion mechanism 91b are configured as gear mechanisms, the seat 20b does not have to be configured to be slidable.

[0060] D. Fourth embodiment: FIG. 10 is a diagram illustrating the first tilting mechanism 30c in the fourth embodiment. More specifically, like FIG. 9, FIG. 10 shows the first tilting mechanism 30c and the second tilting mechanism 90c in the normal state. Also, like FIG. 9, FIG. 10 omits a portion of the seat section 20b. In this embodiment, unlike the first and second embodiments, the first conversion mechanism 60c of the first tilting mechanism 30c is not configured as a link mechanism, but is configured as a lever mechanism that converts an inward force into an upward force using a lever 122. Portions of the configuration of the vehicle seat 100d in the fourth embodiment that are not specifically described are similar to those in the second embodiment.

[0061] The first conversion mechanism 60c has a rod 121, the above-mentioned lever 122, and a second fixed member 130. The configuration of the second conversion mechanism 91c is substantially the same as the configuration of the first conversion mechanism 60c with the left and right reversed.

[0062] The second fixing member 130 is fixed to the floor Fr. The second fixing member 130 is disposed so as to stand upward from the floor Fr.

[0063] The rod 121 has an axial shape along the X direction. A plate-like member 65 similar to that in the first embodiment is fixed to the end of the rod 121 on the +X direction side. The plate-like member 65 functions as the first protrusion 40c, similar to that in the first embodiment.

[0064] The lever 122 has a substantially L-shaped configuration when viewed along the Y direction, and includes one end 123, another end 124, and a bent portion 125. The bent portion 125 connects the one end 123 and the other end 124. The lever 122 is fixed by a fixed pin 126 that penetrates the bent portion 125 in the Y direction so as to be rotatable within a plane along the X and Z directions around the fixed pin 126 as an axis. More specifically, the lever 122 is fixed, for example, via the fixed pin 126 to a fixed column (not shown) that is fixed to the floor Fr so as to extend upward from the floor Fr. In this embodiment, the lever 122 is disposed such that, in a normal state, the one end 123 extends from the bent portion 125 to the lower right and the other end 124 extends from the bent portion 125 to the lower left. The one end 123 is connected to the end of the rod 121 on the −X direction side.

[0065] In this embodiment, a portion of the upper end surface of the other end 124 of the lever 122 forms the first contact portion 50d. More specifically, in this embodiment, when the first protrusion 40c receives a leftward force, the rod 121 is pushed in the −X direction, and the rod 121 pushes the first portion 116 in the −X direction. As the first portion 116 is pushed in the −X direction, the lever 122 rotates counterclockwise around the axis of the fixed pin 126 when viewed along the +Y direction. FIG. 8 schematically shows the lever 122 rotated in this manner by a dashed line. The rotation of the lever 122 moves the other end 124 upward. As the other end 124 moves upward in this manner, the first contact portion 50d pushes the first contact position P1 upward, and an upward force is applied to the first contact position P1. In this way, the first conversion mechanism 60c converts the leftward force applied to the first protrusion 40c into an upward force using the rod 121 and the lever 122, and transmits the upward force to the first contact position P1 via the first contact portion 50d. Similarly to the first tilt mechanism 30c, the second tilt mechanism 90c converts the rightward force applied to the second protrusion 95c into an upward force using the second conversion mechanism 91c, and transmits this upward force to the second contact position P2 via the second contact portion 94d.

[0066] In the fourth embodiment described above, the first conversion mechanism 60c can also convert the inward force applied to the first protrusion 40c into an upward force and transmit it to the first contact portion 50d. The first tilting mechanism 30c can then apply this upward force to the first contact position P1, thereby tilting the seat 20b to the side opposite the first protrusion 40c. Therefore, in this embodiment as well, the first tilting mechanism 30c provided between the seat 20b and the floor Fr can move the occupant Cr seated in the seat 20b away from the impacted side in the event of a side collision.

[0067] In other embodiments, for example, another member may be connected to the other end 124 of the lever 122. For example, a shaft-shaped member may be connected to the other end 124, and this shaft-shaped member may be configured to apply an upward force to the first contact position P1 by moving in the +Z direction as the lever 122 rotates. In this case, for example, a portion of this shaft-shaped member that comes into contact with the first contact position P1 as the lever 122 rotates forms the first contact portion 50d.

[0068] Furthermore, when the first conversion mechanism 60c and the second conversion mechanism 91c are configured as lever mechanisms, similarly to the first embodiment, the first tilting mechanism 30c and the second tilting mechanism 90c may be configured to support the seat 20b in the normal state. Furthermore, when the first conversion mechanism 60c and the second conversion mechanism 91c are configured as lever mechanisms, the seat 20b does not have to be configured to be slidable.

[0069] E. Other Embodiments: (E1) In the above embodiment, the first tip 41 of the first protrusion 40 is configured as a plane perpendicular to the X direction, but it does not have to be configured as a plane. In this case, the plate-like member 65 does not need to be provided, and for example, the right end of the first arm 61 or the right end of the second arm 62 may be configured as the first tip 41.

[0070] (E2) In the above embodiment, the first connecting member 81 and the second connecting member 86 are configured as slide rails, but they do not have to be configured as slide rails.

[0071] (E3) In the above embodiment, the first conversion mechanism 60 and the second conversion mechanism 91 may be configured to convert the inward force FL into the upward force FU by, for example, a rack and pinion mechanism.

[0072] (E4) In the first embodiment, the first conversion mechanism 60 configured as a link mechanism includes the first link portion 70, the third arm 71, the fourth arm 72, and the second link portion 74. In contrast, the first conversion mechanism 60 may not include the first link portion 70, the third arm 71, the fourth arm 72, or the second link portion 74, as long as the first conversion mechanism 60 is configured so that, when a force FL is applied to the first protrusion 40, an upward force FU can be applied to the first contact position P1 with the first tip 41 as the force point, the fixed position 101 as the fulcrum, and the first contact portion 50 as the point of action. Furthermore, for example, a different arm may be connected to the second arm 62. The same applies when the second conversion mechanism 91 is configured as a link mechanism.

[0073] (E5) In the above embodiments, the first conversion mechanism 60 and the second conversion mechanism 91 are configured as substantially the same mechanisms, but they do not have to be configured in this manner. For example, the first conversion mechanism 60 may be configured similarly to the first embodiment, and the second conversion mechanism 91 may be configured similarly to the second or third embodiment. Furthermore, in the above embodiments, the second tilt mechanism 90 is provided, but the second tilt mechanism 90 does not have to be provided. In this case, for example, instead of the second tilt mechanism 90 in the first embodiment, a support member for supporting the seat 20 from below may be disposed to the left of the center of gravity position PG, or the second tilt mechanism 90b in the second to fourth embodiments may simply not be provided.

[0074] The present disclosure is not limited to the above-described embodiments and can be realized in various configurations without departing from the spirit thereof. For example, the technical features in the embodiments corresponding to the technical features in each aspect described in the Summary of the Invention section can be appropriately replaced or combined to solve some or all of the above-described problems or achieve some or all of the above-described effects. Furthermore, if a technical feature is not described as essential in this specification, it can be appropriately deleted. [Explanation of symbols]

[0075] 20, 20b...seat portion, 21...seating surface portion, 22...seat back, 23...headrest, 24...one end, 25...other end, 26...support portion, 27...support plate, 28, 28b...first engaging portion, 29...third engaging portion, 30, 30b, 30c...first tilting mechanism, 40, 40b, 40c...protruding portion, 41...first tip, 50, 50b, 50c, 50d...first contact portion, 6 0, 60b, 60c...first conversion mechanism, 61...first arm, 62...second arm, 63...first connecting portion, 64...joint, 65...plate-shaped member, 70...first link portion, 71...third arm, 72...fourth arm, 74...second link portion, 78...spacer, 80...connecting portion, 81...first connecting member, 82, 82b...second engaging portion, 83...upper end portion, 84, 84 b...overhang portion, 85...inclined surface, 86...second connecting member, 87...fourth engaging portion, 90, 90b, 90c...second inclination mechanism, 91, 91b, 91c...second conversion mechanism, 92...third link portion, 94, 94b, 94c, 94d...second contact portion, 95, 95b, 95c...second protrusion, 96...second tip, 100, 100b, 100c, 100d...wheel Dual-use seat, 101...fixed position, 102...leg, 111...first shaft, 112...second shaft, 113...first gear, 114...second gear, 115...first fixing member, 116...first part, 117...second part, 121...rod, 122...lever, 123...one end, 124...other end, 125...bent part, 126...fixed pin, 130...second fixing member

Claims

1. The seating area and a tilting mechanism provided between the seat and a vehicle floor for tilting the seat, The tilting mechanism includes: a protruding portion that protrudes outward from one end of the seat portion in the width direction of the seat portion; a contact portion arranged to be able to come into contact with a contact position on the underside of the seat portion; a conversion mechanism that connects the protrusion and the contact portion, converts an inward force from the outside to the inside in the width direction applied to the protrusion into an upward force, and transmits the upward force to the contact position via the contact portion, the contact position is located between the center of gravity of the seat in the width direction and the protrusion, The conversion mechanism is a first arm that is rotatably fixed to a fixed position disposed on the floor and extends upward from the fixed position toward the protrusion in the width direction; a second arm that is rotatably connected to the first arm via a connecting portion including the protruding portion, connects the connecting portion and the contact portion, and extends upward from the connecting portion toward the opposite side of the protruding portion in the width direction; Vehicle seat.

2. A seat portion, a tilting mechanism provided between the seat and a vehicle floor for tilting the seat; a connection portion provided between the seat portion and the floor, the connection portion connecting the seat portion to the floor, The tilting mechanism includes: a protruding portion that protrudes outward from one end of the seat portion in the width direction of the seat portion; a contact portion arranged to be able to come into contact with a contact position on the underside of the seat portion; a conversion mechanism that connects the protrusion and the contact portion, converts an inward force from the outside to the inside in the width direction applied to the protrusion into an upward force, and transmits the upward force to the contact position via the contact portion, the contact position is located between the center of gravity of the seat in the width direction and the protrusion, the connection portion includes a first connection member having a second engagement portion that engages with a first engagement portion provided on the seat portion, and a second connection member that is disposed between the first connection member and the seat portion in the width direction with the center of gravity position interposed therebetween and connects the seat portion and the floor, the first connecting member is disposed between the protrusion and the center of gravity; The vehicle seat is configured such that the first engagement portion and the second engagement portion are disengaged when the seat portion is tilted by the tilting mechanism.

3. 3. The vehicle seat according to claim 2, The first connecting member and the second connecting member are each configured as a slide rail extending along the front-rear direction of the seat portion, The connection portion connects the seat portion to the floor by the first connection member and the second connection member so that the seat portion can slide along the front-to-rear direction relative to the floor.

Images