Vehicle seat

Abstract

To provide a vehicle seat which can preferably support a support base provided at a lower portion of a seat back.SOLUTION: A vehicle seat S1 comprises: a support base 60 that is provided on a rear surface of a lower portion of a seat back 2 and attached to the seat back 2 so as to be rotatable through a rotation shaft 50; and leg members 70 which are provided at the support base 60 and attached so as to be rotatable relative to the support base 60 and support the support base 60. The support base 60 is configured to be switchable between a reference position where the support base 60 is disposed on the rear surface of the seat back 2 and a deployment position where the support base 60 is deployed rearward from the seat back 2. Each leg member 70 is configured so as to be switchable between a storage position where the leg member 70 is stored in the support base 60 and a support position where the leg member 70 protrudes from the support base 60 and supports the support base 60.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat having a seat back. [Background technology]

[0002] Conventionally, a vehicle seat (front seat) is known that is provided with a footrest that is provided in a lower portion of the seat back and is attached to the seat back so as to be rotatable via a rotation shaft. By providing the footrest, it is possible to support the feet of an occupant seated in the rear seat (for example, see Patent Documents 1 and 2).

[0003] Patent Document 1 discloses a vehicle seat (front seat) equipped with a footrest provided in the lower portion of the seat back and rotatably attached to the seat back via a rotation shaft, and an ottoman rotatably attached to the seat back via an arm. The footrest supports the feet of an occupant seated in the rear seat, and the ottoman supports the calves of the occupant. Moreover, Patent Document 2 discloses a footrest structure for an automobile seat. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-243801 A [Patent Document 2] Japanese Utility Model Application Publication No. 5-20655 Summary of the Invention [Problem to be solved by the invention]

[0005] In vehicle seats such as those described in Patent Documents 1 and 2, there was a need for technology that could suitably support a support base provided in the lower part of the seat back when the support base is deployed rearward. Also, there has been a demand for compactly arranging the support base and the components that support the support base in the lower portion of the seat back.

[0006] An object of the present invention is to provide a vehicle seat that is capable of suitably supporting a support base provided in a lower portion of the seat back. Another object of the present invention is to provide a vehicle seat in which the support base and the components that support the support base can be arranged compactly. [Means for solving the problem]

[0007] The above problem is solved by the vehicle seat of the present invention, which provides a vehicle seat having a seat back, comprising: a support base provided on the rear surface of a lower portion of the seat back and attached to the seat back so as to be rotatable via a pivot axis; and a leg member provided on the support base and attached so as to be rotatable relative to the support base, and supporting the support base, wherein the support base is configured to be switchable between a reference position located on the rear surface of the seat back and a deployed position in which it is deployed rearward from the seat back, and the leg member is configured to be switchable between a stored position in which it is stored in the support base and a support position in which it protrudes from the support base and supports the support base. As described above, the vehicle seat of the present invention includes the support base and the leg member that is rotatably attached to the support base and supports the support base, thereby realizing a vehicle seat that can suitably support the support base provided in the lower portion of the seat back. The leg members are configured to be switchable between a storage position in which they are stored in the support base and a support position in which they protrude from the support base and support the support base, allowing the support base and the support legs to be compactly arranged in the lower portion of the seat back.

[0008] In this case, the seat cushion is provided with a reclining device that connects the seat back to the seat cushion so that the seat back can rotate relative to the seat cushion and locks the rotational movement of the seat back, and the rotation axis is preferably positioned above the back rotation axis of the reclining device. With the above-described configuration, the support base can be deployed to a relatively high position on the rear surface of the seat cushion, so that the support base can be used as a storage platform, for example. Furthermore, by providing the leg members as described above, the support base can be appropriately supported when the support base is switched from the standard position to the deployed position.

[0009] In this case, it is preferable that the support base be configured to be switchable between the reference position, a first deployed position in which it is deployed from the reference position and supports the feet of an occupant positioned rearward of the vehicle seat, and a second deployed position in which it is further deployed from the first deployed position and serves as a support base. With the above configuration, the support base can be used as a footrest to support the feet of the occupant when in the first deployed position, and as a support base when in the second deployed position. For example, the support base can be used as a support base for placing objects or a support base for the occupant to sit on.

[0010] In this case, the support base is attached so as to be rotatable via a first rotation axis as the rotation axis, and is attached to the seat back so as to be rotatable via a second rotation axis, and the support base has a first support surface when switched from the reference position to the first deployed position by a rotational movement around the first rotation axis, and has a second support surface located on the opposite side to the first support surface when switched from the reference position to the second deployed position by a rotational movement around the second rotation axis. With the above configuration, the first and second support surfaces can be switched, improving the convenience of the support base. For example, the support base can be used as a footrest and for other purposes.

[0011] In this case, when the leg member is in the stored position, it is stored in a storage hole formed in the support base, the leg member is attached so as to be rotatable relative to the support base around a leg rotation axis provided in the storage hole, and the leg member is configured to be rotatable around the leg rotation axis corresponding to the first deployed position and the second deployed position of the support base. With the above-described configuration, the leg members can be rotated in accordance with the deployed position of the support base, and the support base can be supported by the leg members.

[0012] In this case, the first rotating shaft and the second rotating shaft are each attached to the seat back, the first rotating shaft is positioned lower than the second rotating shaft, and the first rotating shaft and the second rotating shaft are each attached so as to be detachable to a first mounting member and a second mounting member provided on the seat back, respectively. By providing different rotation axes in the vertical direction as described above, the support base can be suitably rotated and deployed according to the purpose of use (the support base can be deployed at different height positions).

[0013] In this case, the seat back is provided with a locking device having a first locking member that locks the first pivot shaft when it is attached to the first mounting member, and a second locking member that locks the second pivot shaft when it is attached to the second mounting member, and the locking device switches the locking states of the first locking member and the second locking member. By providing the locking device as described above, the support base can be suitably deployed from the reference position to the first deployed position or the second deployed position. For example, when deploying from the reference position to the first deployed position, it is preferable to set the first rotating shaft in a locked state and the second rotating shaft to be removable from the seat back.

[0014] In this case, it is preferable that the first pivot shaft is attached to the seat back, the second pivot shaft is attached to a connecting member that connects the seat back and the support base, and a movement restricting member is attached to the connecting member that restricts the pivoting movement of the support base and positions the support base at the first deployed position or the second deployed position. By providing the movement restricting member as described above, the support base deployed from the reference position can be suitably positioned and fixed.

[0015] In this case, a first engagement portion and a second engagement portion that engage with the movement-restricting member are respectively provided on the base end and the extended end of the support base, and the first engagement portion engages with the movement-restricting member when the support base is in the first deployed position, and the second engagement portion engages with the movement-restricting member when the support base is in the second deployed position. By providing the movement restricting member and the engaging portion (first engaging portion, second engaging portion) as described above, the support base can be more suitably positioned and fixed.

[0016] In this case, the seat back is provided with a rail device attached to the rear surface of the seat back, supporting the support base so that it can move in the vertical direction and locking the movement of the support base, the rail device having a fixed rail attached to the rear surface of the seat back and extending in the vertical direction, and a slider attached slidably relative to the fixed rail and supporting the support base, the seat back having a fastener attached to the rear surface of the seat back and extending along the fixed rail, and the fastener is configured to be capable of opening and closing a portion of the rear surface of the seat back in response to the vertical movement of the support base. By providing the rail device as described above, the support base can be moved up and down. Furthermore, by providing a fastener (for example, a double fastener) as described above, it is possible to prevent the rail device (a part of the rail device) from being exposed from the rear surface of the seat back. Effect of the Invention

[0017] According to the present invention, it is possible to realize a vehicle seat that can appropriately support a support base provided in a lower portion of a seat back. Also, the support base and the support legs can be arranged compactly in the lower portion of the seat back. According to the present invention, the support base can be used as, for example, a storage base. Also, when the support base is switched from the standard position to the deployed position, the support base can be appropriately supported. Also, according to the present invention, the support base can be used as a footrest for supporting the feet of the occupant when in the first deployed position, and can be used as a support base when in the second deployed position. Furthermore, according to the present invention, the first and second support surfaces can be switched, improving the convenience of the support base. For example, the support base can be used as a footrest and for other purposes. Also, according to the present invention, the leg members can be rotated in accordance with the deployed position of the support base, and the support base can be supported by the leg members. Furthermore, according to the present invention, the support base can be suitably rotated and deployed depending on the purpose of use (the support base can be deployed at different height positions). Furthermore, according to the present invention, the support base can be suitably deployed from the reference position to the first deployed position or the second deployed position. Furthermore, according to the present invention, the support base deployed from the reference position can be suitably positioned and fixed. According to the present invention, the support base can be moved up and down. Also, by providing the fastener, it is possible to prevent the rail device (a part of the rail device) from being exposed from the rear surface of the seat back. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view of a vehicle seat according to a first embodiment; [Diagram 2] FIG. 2 is a diagram showing a state in which the support base of the vehicle seat is in a "reference position." [Diagram 3] FIG. 13 is a diagram showing the state in which the support base is in the "first deployment position." [Figure 4] FIG. 13 is a diagram showing the support base in the "second deployment position." [Figure 5A] FIG. 2 is a side view of the vehicle seat showing the support base, the support legs, and a number of leg pivot shafts. [Figure 5B] 5B is a diagram showing a state in which the support base in FIG. 5A has been switched from the "reference position" to the "first deployed position." [Figure 5C] 5B is a diagram showing a state in which the support base in FIG. 5A has been switched from the "reference position" to the "second deployed position." [Figure 6] FIG. 11 is a perspective view of a vehicle seat according to a second embodiment, showing a state in which the support base is in a "normal position." [Figure 7A] 13 is a diagram showing a state in which the support base has been switched from the "reference position" to the "first deployment position." [Figure 7B] 11 is a vertical cross-sectional view of the support base, showing a state in which the movement restricting member is engaged with the first engagement portion. FIG. [Figure 8A] 13 is a diagram showing the state in which the support base has been switched from the "reference position" to the "second deployment position." [Figure 8B] 13 is a vertical cross-sectional view of the support base, showing a state in which the movement restricting member is engaged with the second engagement portion. FIG. [Figure 9A] FIG. 2 is a side view of the vehicle seat, showing a rail device, a connecting member, and a support base. [Figure 9B] FIG. 2 is a rear view of the vehicle seat, showing the rail device and the fastener (double fastener). [Figure 10] FIG. 11 is a perspective view of a vehicle seat according to a third embodiment, illustrating a state in which the support base is in the "second deployed position" and the support legs are in the "support position." [Figure 11] FIG. 2 shows the support legs in the "storage position." [Figure 12] FIG. 13 is a side view of the vehicle seat of the fourth embodiment, illustrating a state in which the support base is in the "first deployed position" and the support legs are in the "first support position." [Figure 13] FIG. 2 is a side view of the vehicle seat, showing the support base in the "second deployed position" and the support legs in the "second support position." DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. This embodiment relates to a "vehicle seat" that appropriately supports a support base provided on the rear surface of the lower portion of a seat back and enables the support base and components to be arranged compactly. In addition, the side of the vehicle seat where a seat occupant sits relative to the seat back (headrest) is the front side of the seat.

[0020] First Embodiment First, a vehicle seat S1 of the first embodiment will be described with reference to Figs. 1 to 5C. As shown in FIG. 1, the vehicle seat S1 is a vehicle seat, for example a front seat (also called a front seat or a driver's seat) that is arranged at the front position of the vehicle. The vehicle seat S1 comprises a seat body having a seat cushion 1, a seat back 2 and a headrest 3, a slide rail device 10 that supports the seat body so that it can move back and forth relative to the vehicle floor, a height link device 20 that connects the seat body to the vehicle floor so that it can be raised and lowered, and a reclining device 30 that connects the seat back 2 to the seat cushion 1 so that it can be rotated. The vehicle seat S1 further includes a support base 60 attached to the lower portion of the seat back 2 and deployed rearward from the seat back 2, a leg member 70 attached to the support base 60 and supporting the support base 60, and a locking device 80 that locks the deployment operation of the support base 60.

[0021] As shown in Figures 5A to 5C, the vehicle seat S1 has an attachment member 40 (40A, 40B) provided on the rear surface of the lower portion of the seat back 2, and a rotating shaft 50 (50A, 50B) attached to the seat back 2 via the attachment member 40. The support base 60 is rotatably attached to the seat back 2 via a pivot shaft 50, and is configured to be switchable between a "reference position" shown in FIG. 2, a "first deployed position" shown in FIG. 3, and a "second deployed position" shown in FIG. 4.

[0022] As shown in FIG. 1, the seat cushion 1 is a seating portion that supports a seated person (occupant) from below, and includes a cushion frame 1a that serves as a skeleton, a padding material 1b that is placed on the cushion frame 1a, and a cover material 1c that covers the cushion frame 1a and the padding material 1b. The seat back 2 is a backrest portion that supports a seated occupant from behind, and includes a back frame 2a that serves as a skeleton, a pad material 2b, and a cover material 2c. The headrest 3 supports the head of a seated occupant from behind.

[0023] As shown in Figures 1 and 2, the slide rail device 10 is disposed between the seat body and the vehicle floor in the vertical direction, and is equipped with left and right lower rails 11 fixed to the vehicle floor and extending in the fore-and-aft direction of the seat, left and right upper rails 12 supported slidably along the lower rails 11, a locking member 13 that locks the upper rails 12 against the lower rails 11 so that they cannot slide, and a rail operating lever (not shown) that releases the locked state of the locking member 13. The seat cushion 1 (cushion frame 1 a ) is attached to the top surfaces of the left and right upper rails 12 via height link devices 20 .

[0024] As shown in FIG. 1, the height link device 20 is attached between the slide rail device 10 and the seat cushion 1, and includes left and right first links 21 arranged on the front side of the seat, left and right second links 22 arranged on the rear side of the seat, a locking member (not shown) that locks the seat body so that it cannot be raised or lowered, and a height operating lever (not shown) that releases the locked state of the locking member. The height link device 20 can adjust the height of the seat body by using the second link 22 as a driving link, for example.

[0025] As shown in Figures 1 and 2, the reclining device 30 comprises a reclining body 31 that is driven when rotating the seat back 2 (back frame 2a), a back rotation shaft 32, a spiral spring 33 that urges the seat back 2 to rotate forward around the back rotation shaft 32, and a reclining operation lever (not shown) that is operated to release the locked state of the seat back 2.

[0026] The reclining body 31 has a known locking mechanism, and is capable of switching the state of the seat back 2 between a locked state in which the seat back 2 is fixed to the seat cushion 1 and an unlocked state in which the seat back 2 is rotatable relative to the seat cushion 1. The back rotation shaft 32 is supported in the seat width direction on the seat cushion 1 side and the seat back 2 side. One end of the spiral spring 33 is anchored on the seat cushion 1 side, and the other end is anchored on the seat back 2 side.

[0027] As shown in Figures 5A to 5C, a first mounting member 40A that detachably holds a first rotating shaft 50A and a second mounting member 40B that detachably holds a second rotating shaft 50B are attached to the rear surface of the lower portion of the seat back 2 (back frame 2a). The mounting members 40A and 40B are mounting brackets that protrude rearward from the back frame 2a and hold the rotating shafts 50A and 50B from above and below. The first mounting member 40A is disposed at a lower position than the second mounting member 40B.

[0028] The first rotation shaft 50A extends along the seat width direction, and is a rotation shaft for rotating the support base 60 from a "reference position" shown in FIG. 5A to a "first deployed position" shown in FIG. 5B. The second rotation shaft 50B extends along the seat width direction, and is a rotation shaft for rotating the support base 60 from the "reference position" shown in FIG. 5A to the "second deployed position" shown in FIG. 5C. In other words, the support base 60 is rotatably attached to the seat back 2 by a plurality of rotation shafts 50A, 50B, and rotates about one of the rotation shafts.

[0029] The first rotating shaft 50A is disposed at a lower position than the second rotating shaft 50B. The first rotating shaft 50A is disposed below the back rotating shaft 32 of the reclining device 30, and the second rotating shaft 50B is disposed above the back rotating shaft 32 of the reclining device 30.

[0030] As shown in FIGS. 1 to 5C, the support base 60 is a plate-shaped support member, and is attached to the rear surface of the lower portion of the seat back 2 via an attachment member 40 and a rotating shaft 50. When the support base 60 is switched from the "reference position" shown in Figure 2 to the "first deployed position" shown in Figure 3, the support base 60 is used as a footrest to support the feet of an occupant (a passenger sitting in the rear seat). When the support base 60 is switched from the "reference position" shown in Fig. 2 to the "second deployed position" shown in Fig. 4, the support base 60 is used as a support base. For example, the support base 60 is used as an auxiliary seat (auxiliary seat) on which an occupant sits. Alternatively, the support base 60 is used as a support base on which an object is placed.

[0031] As shown in FIG. 1, the support base 60 comprises a plate-shaped support base main body 61 and left and right side members 62 fixed to both sides of the width direction of the support base main body 61 and extending along the length direction of the support base main body 61. The front surface (rear surface) of the support base main body 61 is formed with left and right storage holes 63 that penetrate the support base main body 61 in the thickness direction and are used to store the left and right leg members 70. A leg rotation shaft 64 extending along the width direction of the support base body 61 is supported at one end in the length direction of the support base body 61 . It is preferable that a holding member (for example, a stopper) (not shown) for detachably holding the leg member 70 is attached to the edge portion (peripheral portion) of the storage hole portion 63.

[0032] The side members 62 are rod-shaped members having a rectangular cross section, and the left and right side members 62 are disposed so as to sandwich the support base main body 61 therebetween. A first rotating shaft 50A is supported at one end of the side member 62 in the longitudinal direction, and a second rotating shaft 50B is supported at the other end of the side member 62. A predetermined gap is formed between the support base main body 61 and the first rotating shaft 50A, and a predetermined gap is also formed between the support base main body 61 and the second rotating shaft 50B.

[0033] 3 and 5B, the support base 60 has a first support surface 61a when switched from the "reference position" to the "first deployed position" by a rotational movement about the first rotation shaft 50A. The first support surface 61a is disposed on the upper surface of the support base 60 as a support surface for supporting the feet of an occupant (a occupant seated in the rear seat) as shown in FIG. 4 and 5C, when the support base 60 is switched from the "reference position" to the "second deployed position" by the rotational movement about the second rotation shaft 50B, the support base 60 has a second support surface 61b. As shown in FIG. 4, the second support surface 61b is disposed on the upper surface of the support base 60 as a seating surface for the occupant. That is, the first support surface 61a and the second support surface 61b are surfaces located on opposite sides to each other in the thickness direction of the support base 60. Therefore, the support surface can be switched between the first function (function as a footrest) and the second function (function as an auxiliary seat), thereby improving the convenience of the support base 60.

[0034] As shown in Figures 1, 4, and 5A to 5C, the leg member 70 is a leg (support leg) that supports the support base 60 from below, and is attached to the support base 60 (support base main body 61) so as to be rotatable via the leg rotation axis 64. The leg member 70 is configured to be switchable between a "storage position" in which it is stored in the support base 60 (storage hole portion 63) and a "support position" in which it protrudes from the support base 60 and supports the support base 60 from below. As shown in Figures 5A and 5B, when the leg member 70 is in the "storage position", the outer surface of the leg member 70 and the outer surface of the support base 60 (strictly speaking, the second support surface 61b) are positioned so as to be approximately flush with each other. As also shown in FIG. 5C, when the leg member 70 is in the “support position”, the leg member 70 extends downward and extends in a direction perpendicular to the support base 60. By increasing the thickness of the leg member 70, both surfaces in the thickness direction of the leg member 70 can be configured to be approximately flush with the first supporting surface 61a and the second supporting surface 61b, respectively.

[0035] The leg member 70 is a rod-shaped member (pipe member) with an extension mechanism, and has a long leg body 71, a leg extension member 72 that is retractably attached to the extended end of the leg body 71, and an extension mechanism 73 that connects the leg extension member 72 to the leg body 71 in an extendable manner. By doing so, the length of the leg member 70 can be appropriately adjusted in accordance with the height position of the support base 60. The leg member 70 may not have the extension mechanism 73.

[0036] In the above configuration, as shown in Figs. 5B and 5C, the leg members 70 are disposed at positions corresponding to the "first deployed position" and "second deployed position" of the support base 60. Specifically, when the support base 60 is in the "first deployed position" shown in Fig. 5B, the leg member 70 is stored in the storage hole 63 of the support base 60 and is not disposed in a position to support the support base 60 from below. In other words, when the support base 60 is used as a footrest, the supporting force of the leg member 70 is not necessarily required, and by storing the leg member 70, space around the support base 60 is secured. Furthermore, when the support base 60 is in the "second deployed position" shown in Fig. 5C, the leg members 70 protrude from the support base 60 and are positioned to support the support base 60 from below. In other words, when the support base 60 is used as an auxiliary seat, the supporting force of the leg members 70 is required, and the leg members 70 are positioned in the "support position." When the support base 60 is in the "first deployed position" shown in FIG. 5B, the leg members 70 may protrude slightly and support the support base 60 from below.

[0037] As shown in Figures 5A to 5C, the locking device 80 has a first locking member 81 that locks the first pivot shaft 50A when it is attached to the first mounting member 40A on the rear surface of the seat back 2, a second locking member 82 that locks the second pivot shaft 50B when it is attached to the second mounting member 40B, and an unlocking member 83. In the locking device 80, the locking state of the first locking member 81 and the second locking member 82 can be switched by, for example, an occupant operating the unlocking member 83.

[0038] Specifically, when the support base 60 is moved from the "reference position" shown in Fig. 5A to the "first deployed position" shown in Fig. 5B, the locking device 80 locks the first rotating shaft 50A and unlocks the second rotating shaft 50B. The locked state means that the rotating shaft 50 is in a rotatable state and is held in an unremovable state. This allows the support base 60 to rotate around the first rotating shaft 50A. When the support base 60 is moved from the "reference position" shown in Fig. 5A to the "second deployed position" shown in Fig. 5C, the locking device 80 unlocks the first rotating shaft 50A and locks the second rotating shaft 50B, allowing the support base 60 to rotate around the second rotating shaft 50B.

[0039] The locking device 80 may lock the first rotating shaft 50A in a non-rotatable state (which may be referred to as a second lock state) when the support base 60 is in the "first deployed position". In this way, the locking device 80 can fix the support base 60 in the "first deployed position". Similarly, the locking device 80 may place the second rotating shaft 50B in a state in which it cannot rotate (a second locked state) when the support base 60 is in the "second deployed position".

[0040] As a result, it is possible to realize a vehicle seat S1 that can suitably support the support base 60 provided in the lower portion of the seat back 2. It is also possible to realize a vehicle seat S1 that allows the support base 60 and the leg members 70 to be arranged compactly. Furthermore, it is possible to realize a vehicle seat S1 in which the support base 60 can be used as a footrest and an auxiliary seat.

[0041] <Second embodiment> Next, a vehicle seat S2 according to a second embodiment will be described with reference to Figs. 6 to 9B. It should be noted that a description of the contents that overlap with those of the vehicle seat S1 described above will be omitted.

[0042] As shown in FIG. 6, the vehicle seat S2 comprises a seat cushion 101, a seat back 102, a support base 160 attached to the lower portion of the seat back 102 and deployed rearward from the seat back 102, a leg member 170 supporting the support base 160, and a locking device 180 for locking the deployment operation of the support base 160. The vehicle seat S2 further includes a rail device 190 that is attached to the rear surface of the seat back 102, supports the support base 160 so that the support base 160 is vertically movably, and locks the support base 160 against movement.

[0043] A first rotating shaft 150A and a second rotating shaft 150B are provided on the rear surface of the lower portion of the seat back 102 (back frame 102a). The first rotating shaft 150A is attached to the rear surface of the seat back 102 via a rail device 190. More specifically, the first rotating shaft 150A is attached to a base end of a connecting member 140 that connects the rail device 190 and the support base 160. In other words, the first rotating shaft 150A connects the rail device 190 and the connecting member 140. The second rotating shaft 150B is attached to an extending end portion of the connecting member 140. In other words, the second rotating shaft 150B connects the connecting member 140 and the support base 160.

[0044] The connection member 140 is a rod-shaped member extending along the extension direction of the support base 160, and is disposed so as to sandwich the support base 160 from both sides. As shown in FIGS. 7A to 8B, a movement restricting member 141 that engages with the first engagement recess 165 or the second engagement recess 166 of the support base 160 is attached to the base end portion of the connection member 140. The movement restricting member 141 is a member that restricts the rotational movement of the support base 160 and positions the support base 160 at the "first deployed position" or the second deployed position. The movement restricting members 141 are generally cylindrical members that protrude from the inner surface of the connecting member 140, and are disposed in a pair on the left and right. The movement restricting member 141 may be a member that is elongated in the width direction of the support base 160 .

[0045] The support base 160 is switchable among a "reference position" shown in FIG. 6, a "first deployed position" shown in FIGS. 7A and 7B, and a "second deployed position" shown in FIGS. 8A and 8B. When the support base 160 is in the "first deployed position", it is used as a footrest. When the support base 160 is in the "second deployed position", it is used as an auxiliary seat. When the support base 160 is in the "first deployed position" shown in Fig. 7A, the support base 160 is positioned at the lowest position, but this is not particularly limited. The support base 160 may be positioned slightly higher than the position shown in Fig. 7A. The same is true when the support base 160 is in the "second deployed position" shown in Fig. 8A, and the height position of the support base 160 may be slightly changed.

[0046] As shown in Figures 7A to 8B, the support base 160 has a support base main body 161, left and right storage hole portions 163 formed by penetrating the support base main body 61 in the thickness direction, and a leg rotation axis 164 provided in the storage hole portions 163 and serving as a rotation axis for the leg member 170. Further, a first engagement recess 165 and a second engagement recess 166 that engage with the movement restricting member 141 are formed on the base end and the extending end of the support base 160. 7B, a holding member 167 is attached to the base end of the support base 160, which detachably holds the movement restricting member 141 engaged with the first engagement recess 165. Similarly, a holding member 167 is attached to the extending end of the support base 160 (see FIG. 8B).

[0047] The leg member 170 is configured to be switchable between a "storage position" shown in FIGS. 7A and 7B and a "support position" shown in FIGS. 8A and 8B. The leg member 170 is a rod-shaped member having an extension mechanism, but may not have an extension mechanism.

[0048] The case where the support base 160 is in the "first deployed position" shown in Figures 7A and 7B will be described. When the support base 160 is in the "first deployed position", the leg members 170 are stored in the storage holes 163. The support base 160 is disposed so that the first support surface 161a faces upward. 7B, the movement restricting member 141 provided on the inner surface of the connection member 140 engages with the first engagement recess 165 formed in the support base 160 (base end portion) from above. The movement restricting member 141 is held by the holding member 167. By doing so, when the support base 160 is used as a footrest, the movement restricting member 141 can support the support base 160 (the base end portion of the support base 160). That is, the support base 160 used as a footrest can be suitably supported.

[0049] The case where the support base 160 is in the "second deployed position" shown in Figures 8A and 8B will be described. When the support base 160 is in the "second deployed position", the leg members 170 move to the "support position" and support the support base 160 from below. The second support surface 161b of the support base 160 is disposed so as to face up. More specifically, the support base 160 rotates 180 degrees about the second rotation shaft 150B, and the support surface (upper surface) of the support base 160 switches from the first support surface 161a to the second support surface 161b. 8B, the movement restricting member 141 engages from below with a second engaging recess 166 formed in the support base 160 (extending end portion). The movement restricting member 141 is held by a holding member 167. By doing so, when the support base 160 is used as an auxiliary seat, the movement restricting member 141 can support the support base 160. That is, the support base 160 used as an auxiliary seat can be appropriately supported.

[0050] The locking device 180 may lock the first rotating shaft 150A and the second rotating shaft 150B in an unrotatable state when the support base 160 is in the "first deployed position". Similarly, when the support base 160 is in the "second deployment position", the locking device 180 may lock the first rotating shaft 150A and the second rotating shaft 150B in an unrotatable state.

[0051] As shown in FIGS. 6, 9A, and 9B, the rail device 190 is a device for moving the support base 160 in the vertical direction. The rail device 190 has fixed rails 191 that are attached to the inside of the rear surface of the seat back 102 and extend in the vertical direction, a slider 192 that is slidably attached to the fixed rail 191 and supports the support base 160, and a locking member 193 that fixes the slider 192. A connecting member 140 is connected to the slider 192 via a first rotating shaft 150A.

[0052] In the above configuration, the seat back 102 has a fastener 104 attached to its covering material 102c and extending along a fixing rail 191, as shown in FIGS. 9A and 9B. The fastener 104 is a double fastener, and is configured to be able to open and close a part of the rear surface of the seat back 102 in response to the vertical movement of the connecting member 140 and the support base 160 . More specifically, the fasteners 104a and 104b are connected so as to sandwich the connecting member 140 from above and below. Therefore, the fasteners 104a and 104b can perform opening and closing operations in response to the up and down movement of the connecting member 140. As a result, the rail device 190 can be prevented from being exposed from the opening portion on the rear surface of the seat back 102.

[0053] Even in the above embodiment, it is possible to realize a vehicle seat S2 that can suitably support the support base 160 provided in the lower portion of the seat back 102. Furthermore, the support base 160 and the leg member 170 can be arranged compactly.

[0054] <Third embodiment> Next, a vehicle seat S3 according to a third embodiment will be described with reference to FIGS. It should be noted that the description overlapping with the above-mentioned vehicle seats S1 and S2 will be omitted.

[0055] As shown in FIG. 10, the vehicle seat S3 includes a seat cushion 201, a seat back 202, a support base 260 attached to a lower portion of the seat back 202 and deployed rearward from the seat back 202, a plurality of leg members 270 supporting the support base 260, and a locking device 280 that locks the deployment operation of the support base 260.

[0056] The support base 260 is switched from a "reference position" (not shown) to a "first deployed position" (not shown) by a rotational movement about the first rotation shaft 250A, and is used as a footrest (for example, similar to FIG. 2). The support base 260 is switched from the "reference position" to the "second deployed position" shown in Fig. 10 by a rotational movement centered on the second rotation shaft 50B, and is used as an auxiliary seat.

[0057] The support base 260 has a support base main body 261, left and right side members 262, a plurality of storage recesses 263, and leg rotation shafts 264 attached to the storage recesses 263, respectively. The storage recesses 263 are recesses formed in the bottom surface of the support base main body 261, and a plurality of the storage recesses 263 are formed at intervals in the width direction of the support base 260.

[0058] The leg members 270 are respectively stored in the storage recesses 263 when the support base 260 is in the "reference position" and the "first deployed position". When the support base 260 is in the "second deployed position" shown in FIG. 10, the leg members 270 protrude from the storage recess 263 and support the support base 260 from below.

[0059] In the above configuration, a plurality of leg members 270 (for example, four leg members 270) support the support base 260 from below. This allows the leg members 270 to more firmly support the support base 260 when the support base 260 is used as an auxiliary seat.

[0060] Even in the above embodiment, it is possible to realize a vehicle seat S3 that can suitably support the support base 260 provided in the lower portion of the seat back 202. Furthermore, the support base 260 and the leg member 270 can be arranged compactly.

[0061] <Fourth embodiment> Next, a vehicle seat S4 according to a fourth embodiment will be described with reference to FIGS. Incidentally, description of the contents overlapping with those of the above-mentioned vehicle seats S1 to S3 will be omitted.

[0062] The vehicle seat S4 includes a seat cushion 301, a seat back 302, a support base 360, a leg member 370 that supports the support base 360, and a locking device 380 that locks the support base 360 ​​against unfolding. The support base 360 ​​is switchable among a "reference position," a "first deployed position" shown in FIG. 12, and a "second deployed position" shown in FIG. The leg member 370 is a rod-shaped member having a link mechanism 371 . The leg member 370 is switchable among a "storage position", a "first support position" shown in FIG. 12, and a "second support position" shown in FIG.

[0063] As shown in FIG. 12, the leg members 370 support the support base 360 ​​from below when the link mechanism 371 is in a folded state. As shown in FIG. 13, the leg members 370 support the support base 360 ​​in the "second deployment position" from below by putting the link mechanism 371 in a stretched state. The leg member 370 can be extended or retracted by an occupant manually operating the link mechanism 371, but is not limited to this. The link mechanism 371 may be automatically operated by using a hydraulic cylinder or a drive motor.

[0064] Even in the above embodiment, it is possible to realize a vehicle seat S4 that can suitably support the support base 360 ​​provided in the lower portion of the seat back 302. Furthermore, the support base 360 ​​and the leg member 370 can be arranged compactly.

[0065] <Manufacturing method for vehicle seats> Next, a manufacturing method for the vehicle seat S1 will be described with reference to Figs. 1 to 5C. In addition, with regard to the manufacturing method of the vehicle seat S1, a description of manufacturing steps other than those described below will be omitted.

[0066] First, the seat back 2 is prepared, and the support base 60 is attached to the rear surface of the lower portion of the seat back 2. Specifically, the support base 60 is attached to the seat back 2 so as to be rotatable via the rotation shafts 50A and 50B. At this time, the support base 60 is configured to be switchable between a "reference position" in which it is disposed on the rear surface of the seat back 2 and a "deployed position" in which it is deployed rearward from the seat back 2. A leg member 70 is attached to the support base 60 so as to be rotatable relative to the support base 60. At this time, the leg members 70 are configured to be switchable between a “storage position” in which they are stored in the support base 60 and a “support position” in which they protrude from the support base 60 and support the support base 60 .

[0067] By the above manufacturing method, it is possible to manufacture the vehicle seat S1 capable of favorably supporting the support base 60 provided in the lower portion of the seat back 2.

[0068] <Other embodiments> In the above embodiment, as shown in Fig. 2 to Fig. 4, the support base 60 is switchable from the "reference position" to the "first deployed position" and the "second deployed position", but this is not particularly limited and the support base 60 may be switchable to only one of the deployed positions. In that case, the number of the rotation shafts 50 may be one. In the case where the support base 60 is configured to be switchable only from the "reference position" to the "first deployed position", it is preferable that the leg members 70 protrude so as to support the support base 60 when the support base 60 is in the "first deployed position" (it is preferable that the leg members 70 are in the "support position"). That is, even when the support base 60 is used as a footrest, the leg member 70 may protrude from the support base 60 and support the support base 60 .

[0069] In the above embodiment, a vehicle seat (automobile seat) was described as a specific example, but without being limited thereto, the seat can be used as a seat in vehicles such as trains, buses, etc., as well as in airplanes, ships, etc.

[0070] In the above embodiment, the vehicle seat according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention can be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof. [Explanation of symbols]

[0071] First Embodiment S1 Vehicle seats (vehicle seats) 1 seat cushion 1a Cushion frame 1b, 2b padding material 1c, 2c skin material 2 Seat back 2a Back Frame 3 Headrest 10 Slide rail device 11 Lower rail 12 Upper Rail 13 Locking member 20 Height Link Device 21 First link 22 Second Link 30 Reclining device 31 Reclining unit 32 Rotating shaft 33 Spiral Spring 40, 40A First mounting member 40B Second mounting member 50, 50A 1st rotating shaft 50B Second rotating shaft 60 Support stand 61 Support body 61a 1st support surface 61b Second support surface 62 Side member 63 Storage hole 64 Leg rotation axis 70 Leg members 71 Script body part 72 Leg extension 73 Telescopic mechanism 80 Locking device 81 First locking member 82 Second locking member 83 Unlocking member <Second embodiment> S2 Vehicle seats (vehicle seats) 101 Seat Cushion 102 Seat back 102a Back Frame 102b Pad material 102c skin material 104 Zipper (double zipper) 104a First zipper 104b Second zipper 140 Connection parts 141 Movement restriction member 150A 1st rotating shaft 150B Second rotating shaft 160 Support stand 161 Support body 161a 1st support surface 161b Second support surface 163 Storage hole 164 Leg pivot axis 165 First engagement recess (first engagement portion) 166 Second engagement recess (second engagement portion) 167 Retaining member 170 Leg members 180 Locking device 190 Rail device 191 Fixed Rail 192 Slider 193 Locking member <Third embodiment> S3 Vehicle Seat 201 Seat Cushion 202 Seat back 250A 1st rotating shaft 250B 2nd rotating shaft 260 Support stand 261 Support stand body 262 Side member 263 Storage hole 264 Leg pivot axis 270 Leg members 280 Locking device <Fourth embodiment> S4 Vehicle seats (vehicle seats) 301 Seat Cushion 302 Seat back 350 Rotating Axis 360 support stand 370 Leg members 371 Link Mechanism 380 Locking device

Claims

1. A vehicle seat having a seat back, A support base is provided on a rear surface of a lower portion of the seat back and is attached to the seat back so as to be rotatable via a rotation shaft; a leg member provided on the support base, attached to the support base so as to be rotatable relative to the support base, and supporting the support base; The support base is configured to be switchable between a reference position disposed on a rear surface of the seat back and a deployed position in which the support base is deployed rearward from the seat back, A vehicle seat, characterized in that the leg member is configured to be switchable between a storage position in which it is stored in the support base and a support position in which it protrudes from the support base and supports the support base.

2. a seat cushion; and a reclining device that connects the seat back to the seat cushion so as to be rotatable relative to the seat cushion and locks the rotational movement of the seat back, 2. The vehicle seat according to claim 1, wherein the rotation shaft is disposed above a back rotation shaft of the reclining device.

3. The vehicle seat according to claim 2, characterized in that the support base is configured to be switchable between the reference position, a first deployed position in which it is deployed from the reference position and supports the feet of an occupant located rearward of the vehicle seat, and a second deployed position in which it is further deployed from the first deployed position and serves as a support base.

4. The support base is attached so as to be rotatable about a first rotation shaft as the rotation shaft, and is attached to the seat back so as to be rotatable about a second rotation shaft, The support base is a first support surface when the base position is switched to a first deployed position by a rotational movement about the first rotation axis; 3. The vehicle seat according to claim 1, further comprising a second support surface that is positioned on the opposite side to the first support surface when the vehicle seat is switched from the reference position to the second deployed position by a rotational movement about the second rotation axis.

5. When the leg member is in the stored position, the leg member is stored in a storage hole portion formed in the support base, The leg member is attached to the support base so as to be rotatable about a leg rotation axis provided in the storage hole portion, 5. The vehicle seat according to claim 4, wherein the leg member is configured to be rotatable about the leg pivot shaft in correspondence with the first deployed position and the second deployed position of the support base.

6. The first rotation shaft and the second rotation shaft are each attached to the seat back, The first rotation shaft is disposed below the second rotation shaft, 5. The vehicle seat according to claim 4, wherein the first pivot shaft and the second pivot shaft are removably attached to a first attachment member and a second attachment member, respectively, provided on the seat back.

7. the seat back is provided with a locking device having a first locking member that locks the first pivot shaft in a state where it is attached to the first mounting member, and a second locking member that locks the second pivot shaft in a state where it is attached to the second mounting member, The vehicle seat according to claim 6, wherein the locking device switches between the locked states of the first locking member and the second locking member.

8. The first rotation shaft is attached to the seat back, The second rotation shaft is attached to a connection member that connects the seat back and the support base, 5. The vehicle seat according to claim 4, wherein a movement restricting member is attached to the connecting member for restricting a rotational movement of the support base and for positioning the support base at the first deployed position or the second deployed position.

9. A first engaging portion and a second engaging portion that engage with the movement restricting member are provided on the base end portion and the extension end portion of the support base, respectively. the first engagement portion engages with the movement restricting member when the support base is in the first deployed position, The vehicle seat according to claim 8, wherein the second engagement portion engages with the movement restricting member when the support base is in the second deployed position.

10. a rail device attached to a rear surface of the seat back, supporting the support base so as to be movable in the up and down direction, and locking the movement of the support base; The rail device includes a fixed rail attached to a rear surface of the seat back and extending in a vertical direction, and a slider slidably attached to the fixed rail and supporting the support base, The seat back has a fastener attached to a rear surface of the seat back and extending along the fixing rail, 9. The vehicle seat according to claim 8, wherein the fastener is configured to be capable of opening and closing a portion of the rear surface of the seat back in response to the vertical movement of the support base.

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