JP7618920B2 - Vehicle seat device - Google Patents

Description

The present invention relates to a vehicle seat device that includes a rotation mechanism that rotates the seat body, and a rotation lock mechanism that locks the rotation of the seat body caused by the rotation mechanism at a predetermined position.

A related vehicle seat device is described in Patent Document 1. The rotation mechanism of this vehicle seat device has a rotating base that supports the seat body and a base plate that supports the rotating base, and is configured so that the rotating base can be rotated on the base plate. The rotation of the rotating base relative to the base plate is locked at a predetermined position. That is, when the rotating base reaches a predetermined position, a rotation lock bar provided on the base plate is pushed into the catcher opening of the axis catcher provided on the rotating base. The catcher opening then closes and the rotation lock bar is held by the axis catcher, locking the rotation of the rotating base relative to the base plate. The electric opener provided on the rotating base is operated to open the catcher opening, allowing the rotating base to rotate relative to the base plate.

Japanese Patent Application Publication No. 11-170897

In the above vehicle seat device, the rotation lock mechanism is made up of an axle catcher, a rotation lock rod, and an electric opener, and the axle catcher holds the rotation lock rod to lock the rotational movement of the seat body. However, in the known technology, a dedicated electrical component called an electric opener is used to unlock the rotation lock mechanism, which increases the cost of the vehicle seat device. The present invention was devised in light of the above points, and the problem that the present invention aims to solve is to make it possible to unlock the rotation lock mechanism without the need for a dedicated electrical component.

As a means for solving the above problem, the vehicle seat device of the first invention includes a rotation mechanism that rotates the seat body, and a rotation lock mechanism that locks the rotation of the seat body by the rotation mechanism at a predetermined position. In this type of seat configuration, it is desirable to be able to unlock the rotation lock mechanism without requiring a dedicated electrical component. Therefore, the seat body of the present invention is provided with an angle change mechanism that changes the seat surface angle of the front part of the seat cushion that can support the passenger's legs, and the rotation lock mechanism is configured to be unlocked by the operation of the angle change mechanism. In the present invention, the rotation lock mechanism can be unlocked by utilizing the operation of the angle change mechanism, making it possible to omit electrical components dedicated to unlocking.

The rotation lock mechanism of the vehicle seat device of the first invention has a link that rotates in conjunction with the operation of the angle change mechanism, a locking portion provided on the seat body side, and a locked portion that does not follow the rotational movement of the seat body. The locking portion is separated from the link and stopped by the locked portion, thereby locking the rotation of the seat body by the rotation mechanism, and when the operation of the angle change mechanism is mechanically transmitted to the locking portion via the link, the locking portion is moved to come into contact with the rotating link and disengage from the locked portion, thereby unlocking the rotation lock mechanism. The rotation lock mechanism of the present invention is locked by locking the locking portion provided on the seat body side to the locked portion, and unlocked by moving the locking portion to disengage from the locked portion. Therefore, in the present invention, the operation of the angle change mechanism is mechanically transmitted via the link, thereby allowing the locking portion to disengage from the locked portion, so that the rotation lock mechanism can be unlocked more reliably.

The vehicle seat device of the second invention is the vehicle seat device of the first invention, in which the seat cushion has a first cushion portion forming the front portion thereof and a second cushion portion located behind the first cushion portion and capable of supporting the hip point of a seated occupant, and is disposed on a support member that supports the seat body. A link is provided on the first cushion portion side, and a lock portion is provided on the support member. In this invention, the seat surface angle of the first cushion portion is changed by the angle change mechanism. The link provided on the first cushion portion side can move the lock portion provided on the support member according to the attitude of the first cushion portion.

The vehicle seat device of the third invention is the vehicle seat device of the first or second invention, further comprising a rotation mechanism that rotates the seat body between a normal position facing the front of the vehicle and a boarding/alighting position facing the door opening. In the present invention, the seat body can be rotated between the normal position and the boarding/alighting position by the rotation mechanism, which contributes to ensuring excellent ease of boarding and alighting.

A vehicle seat device according to a fourth aspect of the present invention is a vehicle seat device according to the third aspect of the present invention, in which the seat cushion has a first cushion portion forming a front portion thereof and a second cushion portion located behind the first cushion portion and capable of supporting the hip point of a seated occupant. With the seat body in the normal position, the rotation lock mechanism is unlocked by the operation of the angle change mechanism when the first cushion portion is tilted upward relative to the second cushion portion and takes an upward posture. In this invention, with the seat body in the normal position, the rotation lock mechanism is unlocked by putting the first cushion portion into an upward posture, and the rotational movement of the seat body is permitted. Then, by supporting the legs of the occupant with the first cushion portion in the upward posture while the seat body is rotating, unintended contact between the legs of the occupant and the floor or the like can be avoided as much as possible.

According to the first aspect of the present invention, the rotation lock mechanism can be unlocked without requiring a dedicated electrical component. According to the first aspect, the rotation lock mechanism can be unlocked more reliably. According to the second aspect, the rotation lock mechanism can be unlocked even more reliably. According to the third aspect, the rotation lock mechanism can be unlocked without requiring a dedicated electrical component while ensuring ease of getting on and off. And according to the fourth aspect, the ease of getting on and off can be more reliably ensured.

1 is a schematic perspective view of a vehicle seat device in a normal position; 1 is a schematic perspective view of a vehicle seat device in a getting-in and getting-out position; 1 is a schematic side view of a vehicle seat device in a normal position; 4 is a schematic perspective top view showing a skeleton portion and a rotation mechanism of the seat cushion. FIG. 4 is a schematic side view showing a skeleton portion of the seat cushion and a rotation lock mechanism. FIG. 2 is a schematic side view of the vehicle seat device during rotational movement; FIG. 1 is a schematic side view of a vehicle seat device in a getting-on/off position; 1 is a schematic side view of a vehicle seat device in which an ottoman mechanism is activated; FIG. 2 is a schematic cross-sectional view of a rotation mechanism. FIG. 13 is a schematic side view showing the rotation lock mechanism when unlocked.

Below, an embodiment of the present invention will be described with reference to Figures 1 to 10. For convenience, arrows indicating the front-rear, left-right, and up-down directions of the vehicle are appropriately shown in each figure. Also, Figures 5 and 10 show the main components of the seat cushion and rotation lock mechanism, and other components are simplified. And Figures 3 and 6 to 8 show the main components of the seat body, and other components are simplified or omitted.

[Outline of vehicle seat device]
The vehicle seat device 10 shown in Fig. 1 is a seat device installed on the left side of the front part of the vehicle interior. A windshield FG is provided in front of the vehicle seat device 10, and a door opening D is provided on the left side of the vehicle seat device 10. The vehicle seat device 10 includes a longitudinal slide mechanism 30 for sliding a seat body 20 in the longitudinal direction of the vehicle, a rotation mechanism 40 for rotating the seat body 20 above the longitudinal slide mechanism 30, and a rotation lock mechanism 50 for locking the rotational movement of the seat body 20. Here, the longitudinal slide mechanism 30 includes a pair of left and right lower rails 32 fixed on a floor F in the vehicle interior and extending in the longitudinal direction of the vehicle, and a pair of left and right upper rails 33 that slide longitudinally along the pair of left and right lower rails 32 (for convenience, in Fig. 1, the lower rails are given a common reference number 32, and the upper rails are given a common reference number 33). Each upper rail 33 is configured to be slide-locked in multiple stages relative to each lower rail 32 by a multi-stage lock mechanism (not shown).

The seat body 20 shown in FIG. 1 is equipped with a seat cushion 20A that serves as a seating portion and a seat back 20B that serves as a backrest, with the seat back 20B standing upright from the rear of the seat cushion 20A. As will be described later, the seat cushion 20A is configured so that the seat angle of the front portion (21) can be changed, and furthermore, an ottoman mechanism 26 is provided at the front end portion. In addition, a recliner R that adjusts the inclination angle (reclining angle) of the seat back 20B is provided at the connection position between the seat cushion 20A and the seat back 20B.

In the vehicle seat device 10, as shown in Figs. 1 and 2, the seat body 20 is rotated by the rotation mechanism 40 from a general position facing the front of the vehicle to a boarding/alighting position facing the door opening D. That is, the rotation mechanism 40 is configured to rotate the support member 42 that supports the seat body 20 relative to the base member 41 on the front-rear slide mechanism 30, as described later. The rotational movement of the seat body 20 by the rotation mechanism 40 is locked at a predetermined position, i.e., the general position shown in Fig. 1, by the rotation lock mechanism 50. For this reason, when the seat body 20 is rotated, the lock of the rotation lock mechanism 50 is released, but at this time, the use of dedicated electrical components for unlocking should be avoided as much as possible from the viewpoint of suppressing cost increases. Therefore, in this embodiment, the lock of the rotation lock mechanism 50 is made possible without the need for dedicated electrical components by the configuration described later. Below, each configuration of the vehicle seat device 10 will be described in detail.

[Seat cushion]
The seat cushion 20A shown in Figs. 1 to 3 is formed in a generally rectangular shape when viewed from above, and includes a first cushion portion 21, a second cushion portion 22, an angle change mechanism 23 for changing the seat surface angle of the first cushion portion 21, and an ottoman mechanism 26. The first cushion portion 21 shown in Fig. 3 is a portion forming the front part of the seat cushion 20A based on the general position, and is capable of supporting the leg side (occupant leg side) of the seated occupant CM, particularly the upper side of the knees. The second cushion portion 22 is a portion forming the rear part of the seat cushion 20A, and is capable of supporting the hip point HP of the seated occupant CM. Here, the dimensions of the first cushion portion 21 and the second cushion portion 22 can be set based on, for example, an occupant model conforming to the SAE standard. That is, an occupant model having a size between the AM95 occupant model and the JF05 occupant model can be selected, and the dimensions of both cushion portions 21 and 22 can be set based on the hip point and leg positions of this occupant model.

3 and 4, the first cushion portion 21 has a pair of first frames 21F forming the left and right framework (in FIG. 4, the left and right first frames are given a common reference number 21F for convenience). A first elastic portion 21P (a pad covered with a cover) that elastically supports the occupant is disposed on each first frame 21F via a plate material or wire material (not shown) that is stretched between them. The second cushion portion 22 also has a pair of second frames 22F forming the left and right framework and a second elastic portion 22P (in FIG. 4, the left and right second frames are given a common reference number 22F for convenience). Each first frame 21F of the first cushion portion 21 and each second frame 22F of the second cushion portion 22 are rotatably connected via an angle change mechanism 23 described later.

[Angle change mechanism]
Referring to Fig. 4, the angle change mechanism 23 is a mechanism for connecting the first cushion portion 21 to the second cushion portion 22 so as to change the seat surface angle. The angle change mechanism 23 is composed of a front rotation shaft 24 and a front drive unit 25. That is, the front rotation shaft 24 extending in the seat width direction is fixed to the rear end of the left and right first frames 21F of the first cushion portion 21, and the front rotation shaft 24 is rotatably connected to the front end of the left and right second frames 22F of the second cushion portion 22. The front drive unit 25 is fixed to the second frame 22F, and the front rotation shaft 24 is rotated around its axis by the front drive unit 25, so that the first frame 21F can be rotated up and down relative to the second frame 22F as shown in Fig. 5.

Referring to Figs. 5 to 7, in the seat cushion 20A, only the first cushion portion 21, which forms the front portion, can be rotated up and down with respect to the second cushion portion 22 by the angle change mechanism 23. That is, the first cushion portion 21 can be adjusted between an upward posture (posture indicated by X in the figure) and a downward posture (posture indicated by Y in the figure) by rotating the first frame 21F shown in Fig. 5. In Fig. 5, the first cushion portion 21 is in a normal posture in which it faces slightly downward, and the seat surface angle of the first cushion portion 21 is matched to the seat surface angle of the second cushion portion 22 shown in Fig. 3. In Fig. 6, the first cushion portion 21 is in an upward posture inclined upward with respect to the second cushion portion 22. In Fig. 7, the first cushion portion 21 is in a downward posture inclined downward with respect to the second cushion portion 22.

The posture of each first frame 21F of the first cushion portion 21 shown in FIG. 5 can be controlled by a control portion (not shown) and can also be adjusted by operating an operating portion (not shown). For example, in the case of control by the control portion, the operation status of the rotation mechanism 40 described later, the opening and closing information of the door opening D, and information from a sensor (not shown) that detects an occupant are input to the control portion. The control portion can then determine whether the occupant CM is getting off or on, and can operate the front drive portion 25 of the angle change mechanism 23 based on the result of this determination. When the first cushion portion 21 is rotated up and down, the posture of the seat back 20B and the second cushion portion 22 can be maintained, that is, the seat surface angle and torso angle θ of the second cushion portion 22 can be maintained constant, as shown in FIG. 6 and FIG. 7.

[Ottoman mechanism]
The ottoman mechanism 26 shown in Figures 3 and 8 is a mechanism capable of pushing up the legs (part below the knees) of the occupant, and is connected to the front end of the first cushion portion 21 so as to be vertically rotatable. With reference to Figures 3 and 4, the ottoman mechanism 26 includes an ottoman body 27 and a drive mechanism (ottoman rotation shaft 28, ottoman drive portion 29). The ottoman body 27 includes a pair of left and right link arms 271 that form the framework of the ottoman body 27, and a support plate 272 that is stretched between the link arms 271 (for convenience, the left and right link arms are given the same reference numeral 271 in Figure 4). An elastic portion 27P for the ottoman is provided on each of the link arms 271 and the support plate 272. Further, ottoman rotation shafts 28 extending in the seat width direction are fixed to rear ends of the left and right link arms 271 of the ottoman main body 27, and each ottoman rotation shaft 28 is rotatably connected to a front end of the left and right first frames 21F of the first cushion portion 21. The ottoman rotation shafts 28 are rotated about their axis by an ottoman drive unit 29 fixed to the first frames 21F. In this manner, each link arm 271 of the ottoman main body 27 can be rotated up and down relative to each first frame 21F of the first cushion portion 21, as shown in Figures 3 and 8.

The ottoman body 27 can be moved between the deployed position shown in FIG. 3 and the stored position shown in FIG. 8 by the ottoman drive mechanism. The position adjustment of the ottoman body 27 can be controlled by a control unit (not shown) and can also be adjusted by operating an operating unit (not shown). The ottoman body 27 in the deployed position shown in FIG. 8 is extended forward with respect to the first frame 21F of the first cushion portion 21 based on the normal position, and can push up the occupant's legs. The ottoman body 27 in the stored position shown in FIG. 3 is extended below the seat cushion 20A and is positioned so as not to come into contact with the occupant's legs as much as possible. That is, in the ottoman body 27 in the stored position, each link arm 271 forming the skeleton is positioned rearward of the imaginary line VL extending vertically downward from the front end of the first cushion portion 21 (first elastic portion 21P).

[Rotation mechanism]
The rotation mechanism 40 shown in Figs. 1 and 2 is a mechanism for rotating the seat body 20 between the normal position and the boarding/disembarking position, and is disposed between a base member 41 and a support member 42. Here, the base member 41 is a part that does not follow the rotational movement of the seat body 20, and is composed of a plate material that is rectangular when viewed from above and is stretched between the left and right upper rails 33. The support member 42 is a member that supports the seat body 20 and is rectangular when viewed from above, and can follow the rotational movement of the seat body 20. As shown in Fig. 9, the rotation mechanism 40 includes an inner ring 43 fixed on the base member 41 and an outer ring 44 supported rotatably relative to the inner ring 43 (outer periphery side), and the support member 42 is fixed on the outer ring 44. The base member 41 or the support member 42 is provided with a drive unit (not shown) that rotates the outer ring 44 relative to the inner ring 43. As a result, the seat body 20 supported by the support member 42 can be rotated (rotated approximately 90° when viewed from above) around the axis of the inner ring 43 and the outer ring 44 relative to the base member 41. The rotational movement of the seat body 20 by the rotation mechanism 40 can be locked by a rotation lock mechanism 50, which will be described later.

[Rotation lock mechanism]
The rotation lock mechanism 50 shown in Fig. 1 and Fig. 5 is a mechanism that locks the rotational movement of the seat body 20 by the rotation mechanism 40 at a predetermined position, i.e., a normal position. The rotation lock mechanism 50 has a locking part 51 provided on the seat body 20 side, a locked part 52 that does not follow the rotational movement of the seat body 20, and a link 53 described later. Here, the locked part 52 is provided on the left side of the vehicle of the base member 41 of the rotation mechanism 40, and is composed of a horizontal pin 521 extending in the vehicle width direction, and a vertical pin 522 extending downward from the left and right ends of the horizontal pin 521 and fixed to the base member 41. The locking part 51 is a member that is long in the front-rear direction based on the seat body 20 in the normal position, and is provided on the left side of the support member 42 so as to be vertically rotatable. A locking part 511 that is bent downward is provided at the rear end of the locking part 51, and a plate-shaped load receiving part 512 is provided in the vicinity of the front end of the locking part 51. The lock portion 51 is connected to the support member 42 via a rotation center pin 513 inserted in the center between the rear end and the front end so as to be vertically rotatable.

1 and 5, when the seat body 20 is in the normal position, the rear end of the locking portion 51 of the rotation lock mechanism 50 is biased downward by a biasing portion (not shown). This causes the rear end of the locking portion 51 to rotate downward, and the engaging portion 511 provided at this rear end is engaged with the horizontal pin 521 of the locked portion 52 (see the state shown by the solid line in FIG. 5). In this way, the locking portion 51 is stopped by the locked portion 52, and the support member 42 equipped with this locking portion 51 cannot rotate relative to the base member 41, thereby locking the rotational movement of the seat body 20 by the rotation mechanism 40. In addition, in the engaged state, the front end of the locking portion 51 faces upward, and the load receiving portion 512 provided at this front end is positioned in an upper position. When the load receiving portion 512 is pressed downward by an external force, the rear end of the locking portion 51 rotates upward against the biasing force, causing the engaging portion 511 to disengage from the horizontal pin 521 of the locked portion 52 (see the state shown by the dashed line in FIG. 5). In this way, the locking portion 51 moves to disengage from the locked portion 52, and the rotation lock mechanism 50 is unlocked, allowing the support member 42 that supports the seat body 20 to rotate relative to the base member 41.

[Unlocking the rotation lock mechanism]
1 and 2, when an occupant gets off the vehicle, the seat body 20 in the normal position is rotated to the boarding/alighting position by the rotation mechanism 40, and the occupant on the seat body 20 faces the door opening D. At this time, the rotation lock mechanism 50 is released to allow the seat body 20 in the normal position to be rotated. In this type of configuration, from the viewpoint of suppressing an increase in costs, the use of a dedicated electrical component for unlocking the rotation lock mechanism 50 should be avoided as much as possible.

[Unlock with link]
Therefore, the vehicle seat device 10 is provided with an angle change mechanism 23 that changes the seat cushion angle at the front of the seat cushion 20A, as shown in Figs. 4 and 5. The rotation lock mechanism 50 is configured to be unlocked by the operation of the angle change mechanism 23. That is, the rotation lock mechanism 50 is provided with a link 53 that operates in conjunction with the operation of the angle change mechanism 23, and the link 53 is provided on the front rotation shaft 24 of the angle change mechanism 23, i.e., on the rear end side (first cushion part side) of the first frame 21F. The link 53 is rotatable up and down in conjunction with the rotation of the front rotation shaft 24, and extends from the front rotation shaft 24 to the rear side of the vehicle so as to be rotatable in the opposite direction to each of the first frames 21F. When each of the first frames 21F shown in Fig. 5 is in a normal state, the link 53 is gradually inclined downward as it moves rearward from the front rotation shaft 24. In this embodiment, the link 53 is configured to reach the load receiving part 512 of the lock part 51 when the link 53 rotates downward. That is, as shown in FIG. 10, when the lower end of the link 53 rotates downward, the load receiving portion 512 is arranged to overlap with the rotation locus T of the lower end.

Referring to FIG. 10, the front rotation shaft 24 of the angle change mechanism 23 is rotated around the axis so that the first cushion part 21 is in an upward position. At this time, each first frame 21F of the first cushion part 21 rotates upward around the front rotation shaft 24, and in conjunction with this movement, the link 53 rotates downward around the front rotation shaft 24. The lower end of the link 53 then abuts against the load receiving part 512 of the lock part 51, and the load receiving part 512 is further pressed downward by the downward rotation of the link 53. When the load receiving part 512 of the lock part 51 is pressed downward in this way, the rear end of the lock part 51 rotates upward against the biasing force, and the engaging part 511 is thereby disengaged from the horizontal pin of the locked part 52. In this way, the operation of the angle change mechanism 23 is mechanically transmitted to the lock part 51 via the link 53, and the lock part 51 is moved so as to disengage from the locked part 52, thereby unlocking the rotation lock mechanism 50. The link 53 on the first cushion portion 21 side and the lock portion 51 of the support member 42 rotate together with the seat body 20. Therefore, as described below, by keeping the first cushion portion 21 in an upward position while the seat body 20 rotates, the release state of the lock portion 51 by the link 53 is maintained.

[Behavior of the vehicle seat device when a passenger gets off the vehicle]
When the occupant gets off the vehicle, the rotation lock mechanism 50 is unlocked as described above, and the rotational movement of the seat body 20 by the rotation mechanism 40 shown in FIG. 1 is permitted. Next, while the seat body 20 rotates from the normal position to the boarding/alighting position, the first cushion portion 21 is maintained in an upward orientation relative to the second cushion portion 22 as shown in FIG. 6. In this way, while the seat body 20 rotates when the occupant gets off the vehicle, the legs of the occupant are supported by the first cushion portion 21 in the upward orientation, so that unintended contact between the legs of the occupant and the floor F or the like can be avoided as much as possible. Then, in the seat body 20 at the boarding/alighting position shown in FIG. 7, the first cushion portion 21 is controlled to change from an upward orientation to a downward orientation while maintaining the orientations of the seat back 20B and the second cushion portion 22. In this way, by maintaining the orientations of the second cushion portion 22 and the seat back 20B, i.e., the seat surface angle and the torso angle θ of the second cushion portion 22 as much as possible, it is possible to achieve a configuration that minimizes the forward slippage sensation of the occupant CM when getting on and off the vehicle. In addition, by displacing the first cushion portion 21 from an upward position to a downward position to bring the occupant's legs (parts below the knees) closer to the road surface RS, etc., the configuration contributes to ensuring that the occupant CM can reach the ground with his/her feet when getting off the vehicle. In addition, with the seat body 20 in the getting-on/off position, the foot reach can be ensured in the position of the first cushion portion 21, so there is no need to excessively protrude the seat cushion 20A outward from the door opening D, resulting in a configuration that is easy to use in parking lots, etc.

When the occupant dismounts, the ottoman mechanism 26 is moved to the stored position as shown in FIG. 7. In this stored position, each link arm 271 of the ottoman mechanism 26 is positioned behind the imaginary line VL that extends vertically downward from the front end of the first cushion portion 21. As a result, when the occupant CM tries to stand up from the seat main body 20, the ottoman mechanism 26 (particularly the frame portion) is less likely to interfere excessively with the legs of the occupant, making it possible to minimize the possibility of the ottoman mechanism 26 interfering with the ingress/egress motion.

[Behavior of the vehicle seat device when a passenger is seated]
7, when an occupant gets on, the occupant CM is seated in the seat body 20 in the boarding/alighting position with the first cushion portion 21 in a downward position. Then, as the seat body 20 starts to rotate, the first cushion portion 21 is controlled to change from the downward position to an upward position. Then, while the seat body 20 rotates from the boarding/alighting position to the normal position, the first cushion portion 21 is maintained in an upward position relative to the second cushion portion 22, as shown in FIG. 6. In this way, while the seat body 20 rotates when the occupant gets on, the legs of the occupant are supported by the first cushion portion 21 in the upward position, thereby making it possible to prevent unintended contact between the legs of the occupant and the floor F, etc., as much as possible.

5, the seat body 20 is held in a position facing forward of the vehicle by locking the rotation lock mechanism 50 after the seat body 20 reaches the normal position. When locking the rotation lock mechanism 50, the front rotation shaft 24 is rotated in the reverse direction around its axis to move the first cushion portion 21 from its upward orientation to its downward orientation (see the state shown by the two-dot dashed line in FIG. 10). At this time, the link 53 of the rotation lock mechanism 50 rotates upward around the front rotation shaft 24 in conjunction with the operation of the angle change mechanism 23, and moves away from the load receiving portion 512 of the lock portion 51. The lock portion 51 is biased in a direction in which the rear end portion is downward by a biasing portion (not shown), so that the engaging portion 511 provided at the rear end portion is engaged with the horizontal pin 521 of the locked portion 52 (see the state shown by the two-dot dashed line in FIG. 10).

After the seat body 20 is locked in the normal position shown in FIG. 3, the posture of the first cushion portion 21 can be adjusted within a range in which the locked state can be maintained, making it possible to adjust the seating surface angle of the front part of the seat cushion 20A according to the occupant CM. For example, the first cushion portion 21 can be placed in the normal posture so that the seating surface angles of both cushion portions 21, 22 can be matched. In addition, as shown in FIG. 8, the ottoman mechanism 26 can be operated to lift the occupant's legs, thereby providing an excellent seating comfort for the occupant CM.

As described above, in this embodiment, the rotation lock mechanism 50 can be unlocked by utilizing the operation of the angle change mechanism 23, so that it is possible to omit electrical components dedicated to unlocking. That is, the rotation lock mechanism 50 is locked by locking the locking portion 51 provided on the seat body 20 side to the locked portion 52, and unlocking is performed by moving the locking portion 51 so as to be disengaged from the locked portion 52. Therefore, in this embodiment, the operation of the angle change mechanism 23 is mechanically transmitted via the link 53, so that the locking portion 51 is disengaged from the locked portion 52, and therefore the rotation lock mechanism 50 can be unlocked more reliably. Therefore, according to this embodiment, the rotation lock mechanism 50 can be unlocked without requiring a dedicated electrical component. In this way, the vehicle seat device 10 does not require electrical components dedicated to unlocking, so that it is possible to reduce the cost and the number and mass of parts. Furthermore, by linking the operation of the link 53 to the operation of the angle change mechanism 23, the rotation lock mechanism 50 can be unlocked quickly, which contributes to shortening the operation time.

Furthermore, in this embodiment, the seat surface angle of the first cushion portion 21 is changed by the angle change mechanism 23. The link 53 provided on the first cushion portion 21 side can move the lock portion 51 provided on the support member 42 according to the posture of the first cushion portion. In this embodiment, the seat body 20 can be rotated between the normal position and the boarding and disembarking position by the rotation mechanism 40, which contributes to ensuring excellent boarding and disembarking. In this embodiment, when the seat body 20 is in the normal position, the first cushion portion 21 is placed in an upward posture, and the lock of the rotation lock mechanism 50 is released, allowing the seat body 20 to rotate. During the rotation of the seat body 20, the occupant's legs are supported by the first cushion portion 21 in the upward posture, so that unintended contact between the occupant's legs and the floor F can be avoided as much as possible.

The vehicle seat device of this embodiment is not limited to the above-mentioned embodiment, and may take various other embodiments. In this embodiment, the configuration of the seat cushion is exemplified, but the configuration of the seat cushion is not intended to be limited. For example, the angle change mechanism may be configured to connect the first cushion part and the second cushion part via various link mechanisms such as a four-joint link, in addition to the case where the first cushion part and the second cushion part are connected (hinged) by the front rotation shaft. In addition, the first cushion part and the second cushion part are provided with separate frames as skeletons, but the elastic parts (pad and cover) do not necessarily need to be separated. In addition, the ottoman mechanism may be configured to operate separately from the first cushion part, or to operate in conjunction with the first cushion part. The ottoman mechanism is configured to be attached to the seat cushion as necessary, and may be omitted. In addition, in this embodiment, the control method of the seat cushion when the occupant gets on and off is exemplified, but the control method is not intended to be limited.

In this embodiment, the configuration in which the rotation lock mechanism is unlocked by the operation of the angle change mechanism is exemplified, but the unlocking configuration is not limited. For example, the rotation lock mechanism can be unlocked by mechanically transmitting the operation of the angle change mechanism. That is, another link, gear, cable, or other member may be interposed between the link and the lock part, or other member may be used instead of the link. The link can be provided on the first frame in addition to the front rotation shaft. The arrangement positions of the link and the lock part can also be changed as appropriate, and do not necessarily have to be arranged on the front part of the seat cushion or the support member. In this embodiment, the rotation lock mechanism is unlocked by the operation of the angle change mechanism when the first cushion part is in the upward position. Alternatively, it is possible to unlock the rotation lock mechanism by the operation of the angle change mechanism when the first cushion part is in the downward position by changing the configuration of the link or using other members.

In addition, in this embodiment, the configurations of the rotation mechanism and the rotation lock mechanism are exemplified, but the configuration of each mechanism is not limited. For example, a rotation mechanism that rotates the base member and the support member via a link can be adopted. The rotation lock mechanism can be configured to lock the locking part and the locked part from the vehicle front-rear direction or the vehicle width direction in addition to the up-down direction, and the configuration of the locking part and the locked part can be changed as appropriate. The lock position of the rotation movement of the seat body by the rotation lock mechanism does not necessarily have to be limited to the general position, and can be set to various positions such as the boarding and disembarking position. The seat body in the general position does not necessarily have to face the front of the vehicle, and can be oriented in an appropriate direction of the vehicle. The position of the seat body after the rotation movement does not necessarily have to be set to the boarding and disembarking position facing the door opening side, as long as the position is different from the general position. The vehicle seat device may have a seat body for one person or multiple people.

10 Vehicle seat device 20A Seat cushion 20B Seat back 20 Seat body 21 First cushion portion 21F First frame 21P First elastic portion 22 Second cushion portion 22F Second frame 22P Second elastic portion 23 Angle change mechanism 24 Front rotation shaft 25 Front drive portion 26 Ottoman mechanism 27 Ottoman body 27P Elastic portion for ottoman 271 Link arm 272 Support plate 28 Ottoman rotation shaft 29 Ottoman drive portion 30 Front-rear slide mechanism 32 Lower rail 33 Upper rail 40 Rotation mechanism 41 Base member 42 Support member 43 Inner wheel 44 Outer wheel 50 Rotation lock mechanism 51 Lock portion 511 Engagement portion 512 Load receiving portion 513 Rotation center pin 52 Locked portion 521 Horizontal pin 522 Vertical pin 53 Link D Door opening F Floor FG Front glass HP Hip point R Recliner RS Road surface T Rotation trajectory VL Virtual line θ Torso angle

Claims (4)

A vehicle seat device including a rotation mechanism for rotating a seat body, and a rotation lock mechanism for locking the rotation of the seat body by the rotation mechanism at a predetermined position,
the seat body is provided with an angle change mechanism for changing a seat surface angle of a front part of a seat cushion capable of supporting a leg side of an occupant, and the rotation lock mechanism is configured to be unlocked by the operation of the angle change mechanism,
the rotation lock mechanism includes a link that rotates in conjunction with the operation of the angle change mechanism, a locking portion provided on the seat body side, and a locked portion that does not follow the rotational movement of the seat body,
When the locking portion is separated from the link and stopped by the locked portion, the rotation of the seat body by the rotation mechanism is locked,
When the operation of the angle change mechanism is mechanically transmitted to the locking portion via the link, the locking portion abuts against the rotating link and is moved so as to disengage from the locked portion, thereby unlocking the rotation lock mechanism . the seat cushion has a first cushion portion forming a front portion thereof and a second cushion portion located rearward of the first cushion portion and capable of supporting a hip point of a seated occupant, and is disposed on a support member supporting the seat main body;
The vehicle seat apparatus according to claim 1 , wherein the link is provided on the first cushion portion, and the lock portion is provided on the support member . 3. The vehicle seat apparatus according to claim 1, further comprising the rotation mechanism that rotates the seat body between a normal position facing forward of the vehicle and a boarding/exiting position facing a door opening. the seat cushion has a first cushion portion forming a front portion thereof, and a second cushion portion located rearward of the first cushion portion and capable of supporting a hip point of a seated occupant,
4. The vehicle seat device according to claim 3, wherein when the seat body is in a normal position, the angle change mechanism causes the first cushion portion to assume an upward orientation in which the first cushion portion is inclined upward relative to the second cushion portion, thereby releasing the lock of the rotation lock mechanism .

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