Seat device for vehicle

Abstract

The invention provides a vehicle seat device. The vehicle seat device includes a base portion capable of horizontally rotating, a support portion that supports a seat body so as to be capable of advancing and retreating with respect to the base portion, and a drive portion that drives the support portion. The seat main body in the get-on and get-off position moves forward and backward between a first state in which the seat main body is disposed on the base part and a second state in which the seat main body is separated from the base part compared with the first state by being driven by the support part. And an elastically deformed deformation member is provided so as to follow at least one of the seat main body and the support section that move forward and backward between the states, whereby the seat main body is biased in the forward and backward movement direction with a force when the deformation member returns to the original basic state.

Description

Technical Field

[0001] The present invention relates to a vehicle seat device, which includes a base portion capable of horizontal rotation, a support portion for supporting a seat main body so as to be able to move forward and backward relative to the base portion, and a drive portion for driving the support portion. Background Art

[0002] In Japanese Unexamined Patent Application Publication No. 2008-126692, a technique related to such a device is disclosed. The seat moving device of this document has a sliding member (equivalent to the support portion) that supports the seat main body on a base member so as to be able to move forward and backward, and this sliding member can be driven by a drive motor (equivalent to the drive portion). Moreover, in the above seat moving device, first, the seat main body facing the vehicle front is displaced to the boarding and alighting position facing the vehicle side on the side of the door opening by the horizontal rotation of the base member. Next, by driving the drive motor, the seat main body at the boarding and alighting position moves forward and backward in the vehicle interior and exterior direction while being supported by the sliding member. In the above structure, the seat main body at the boarding and alighting position moves forward to the outside of the vehicle together with the sliding member driven by the drive motor. As a result, the seat main body at the boarding and alighting position is in a state of being slid out to the outside of the vehicle, and thus it becomes a structure that helps to ensure the boarding and alighting performance. Moreover, by the sliding member moving backward to the inside of the vehicle, the seat main body on which the occupant is seated returns to the original position on the base member. Summary of the Invention

[0003] However, in the field of vehicle seat devices, there is a requirement to miniaturize such structural components as much as possible, and in particular, miniaturization of the drive motor (drive portion) is highly desired. Here, in the above structure, in order to move the seat main body in the vehicle interior and exterior direction, the sliding member that supports the seat main body is driven by a drive motor. And it becomes the following structure, that is, the forward and backward movement amount (sliding out amount) of the seat main body at the boarding and alighting position is set from the viewpoint of ensuring the boarding and alighting performance, and the larger this sliding out amount is, the more it helps to ensure the boarding and alighting performance. In the above structure, since the size of the drive motor has a tendency to become larger according to the sliding out amount of the seat main body, it is difficult to miniaturize the drive motor while ensuring the boarding and alighting performance. The present invention is an original invention in view of the above problems, and the problem to be solved by the present invention is to be able to miniaturize the drive portion as much as possible while ensuring the boarding and alighting performance of the vehicle seat device.

[0004] A mode of the present invention is a vehicle seat device. The vehicle seat device includes a base portion capable of horizontal rotation, a support portion that supports a seat main body so as to be able to move forward and backward relative to the base portion, and a drive portion that drives the support portion. The seat main body is displaced between a seating position facing the front of the vehicle and an access position facing the side of the vehicle by the horizontal rotation of the base portion. The seat main body at the access position is moved forward and backward between a first state in which it is disposed on the base portion and a second state in which it is separated from the base portion compared to the first state by the drive of the support portion, and by causing a deformed member that has undergone elastic deformation to follow at least one of the seat main body and the support portion that move forward and backward between the states, the seat main body is applied with a force in the forward and backward movement direction by the force when the deformed member returns to its original basic state. In the above structure, at least one of the seat main body and the support portion that move forward and backward between the states is applied with a force in the forward and backward movement direction by the restoring force of the deformed member that returns from the deformed state to the original basic state while following it (moving with it). According to the above structure, by obtaining the force of the deformed member (the restoring force that becomes an auxiliary force) when the seat main body moves between the states, it is possible to reduce the thrust of the drive portion, and thus the drive portion can be miniaturized as much as possible.

[0005] In the vehicle seat device, it may also be configured such that the deformed member is gradually deformed as the seat main body moves forward from the first state to the second state, and becomes the basic state when the seat main body moves backward from the second state to the first state. In the present invention, the auxiliary force of the deformed member can be accumulated or released by the forward and backward movement of the seat main body between the states.

[0006] In the vehicle seat device, it may also be configured such that the seat main body at the access position moves backward toward the inside and upper side of the vehicle from the second state to become the first state, and the deformed member is configured to apply a force to the seat main body in the second state in at least one of the directions toward the inside or upper side of the vehicle. In the above structure, the function of the deformed member can be used to apply a force to the seat main body that moves backward toward the first state in the direction toward the inside or upper side of the vehicle, thereby becoming a structure that is more conducive to the miniaturization of the drive portion.

[0007] According to the present invention, it is possible to miniaturize the drive unit as much as possible while ensuring the getting-on and -off performance of the vehicle seat device. In addition, according to the present invention, by appropriately accumulating and releasing the auxiliary force by utilizing the movement between the states of the seat body, it is possible to more reliably miniaturize the drive unit. Further, according to the present invention, by applying the auxiliary force during the backward movement of the seat body, it is possible to more reliably miniaturize the drive unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Hereinafter, the features, advantages, and technical and industrial significance of the exemplary embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals denote like elements, and wherein:

[0009] Figure 1 It is a schematic perspective top view of a vehicle showing a vehicle seat.

[0010] Figure 2 It is a schematic perspective rear view showing the basic structure of a vehicle seat.

[0011] Figure 3 It is a schematic perspective side view of a vehicle seat device in the getting-on and -off position.

[0012] Figure 4 It is a schematic perspective side view of a vehicle seat device in the first state.

[0013] Figure 5 It is a schematic perspective side view of a vehicle seat device in the second state.

[0014] Figure 6 It is a schematic perspective view of a vehicle seat device in the second state.

[0015] Figure 7 It is a schematic perspective side view of a vehicle seat device showing a deformed part during the movement between states.

[0016] Figure 8 It is a schematic perspective side view of a vehicle seat device showing a deformed part in the basic state.

[0017] Figure 9 It is a schematic perspective view of a vehicle seat device showing a modified deformed part.

[0018] Figure 10 It is a schematic enlarged side view of a vehicle seat device showing a deformed part of Embodiment 2. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, with reference to Figures 1 to 10A description will be given of the ways to implement the present invention. In each of the drawings, arrow marks indicating the front-rear direction, left-right direction (vehicle width direction), and up-down direction (height direction) of the vehicle are appropriately illustrated. In addition, in each of the drawings, the main structure of the vehicle seat device may be illustrated by a solid line, and the illustration of other structures may be omitted.

[0020] [Overview of Vehicle Seat Device]

[0021] First, the basic structure of the vehicle seat device 2 provided on the vehicle 1 will be described. Figure 1 The illustrated vehicle seat device 2 is provided on the vehicle floor 3 and includes a seat main body 60 on which an occupant can sit. A door opening 4 is provided on the outer side in the vehicle width direction (left side which is the vehicle outer side) of the vehicle seat device 2. And, as Figure 2 shown, the vehicle seat device 2 has a fixing portion 10 fixed to the vehicle floor 3, a sliding portion 20 provided on the fixing portion 10 so as to be slidable back and forth, and a base portion 30 provided on the sliding portion 20 so as to be horizontally rotatable. In addition, a support portion 40 is provided on the base portion 30. The support portion has a lifting base 50 and a drive portion 52. On the lifting base 50 of the support portion 40, the seat main body 60 is provided via an outer sliding mechanism 55.

[0022] Next, a simple description will be given of the actions when an occupant gets in and out of the vehicle seat device 2. In this vehicle seat device 2, referring to Figure 1 and Figure 2 , when an occupant gets in and out of the vehicle, the sliding portion 20 is slid back and forth relative to the fixing portion 10, so that the seat main body 60 can be arranged at a position where it can be horizontally rotated. Next, referring to Figure 1 and Figure 3 , by horizontally rotating the base portion 30 relative to the sliding portion 20, the seat main body 60 is displaced from the seating position facing the vehicle front to the getting-in-and-out position facing the vehicle side on the side of the door opening 4. Then, referring to Figure 4 , by the function of the outer sliding mechanism 55, the seat main body 60 at the getting-in-and-out position moves forward on the lifting base 50 to the vehicle outer side (left side) on the side of the door opening 4. Thus, the seat main body 60 becomes a first state in which it protrudes to the vehicle outer side on the base portion 30. In the seat main body 60 in this first state, its rear end portion is arranged at the vehicle outer end of the base portion 30, that is, at the forward limit position on the base portion 30.

[0023] And, as Figure 5As shown, the support portion 40 is driven by the drive portion 52. As a result, the seat body 60 supported by the support portion 40 moves forward further toward the outside of the vehicle from the base portion 30 while gradually descending (rotating) toward the lower side of the vehicle. In the above structure, the seat body 60 at the getting-on and -off position becomes a second state in which it is largely slid out toward the outside and lower side of the vehicle with respect to the base portion 30, thus becoming a structure that helps to ensure excellent getting-on and -off performance. Then, after the occupant sits on the seat body 60, the seat body 60 is moved backward toward the inside and upper side of the vehicle by the function of the support portion 40 and then arranged on the base portion 30 (see Figure 3 , Figure 4 ).

[0024] In the above vehicle seat device 2, referring to Figure 4 and Figure 5 , by the function of the support portion 40 driven by the drive portion 52, the seat body 60 moves forward and backward between a first state on the base portion 30 and a second state in which it is separated from the base portion 30 toward the outside of the vehicle. Moreover, in this structure, it is desired to miniaturize the drive portion 52 as much as possible while ensuring the getting-on and -off performance. Here, in the above structure, from the viewpoint of ensuring the getting-on and -off performance, Figure 5 the seat body 60 in the second state shown becomes a state in which it is largely slid out from the base portion 30, and thus a gap 100 is generated in the vehicle interior - exterior direction between the seat body 60 and the base portion 30. And the size of the drive portion 52 in the above structure is selected based on the thrust when the seat body 60 moves backward between states (within the range of the gap 100) when the occupant sits down. Therefore, in the present embodiment, by Figure 6 the deformation member 70 shown, it is possible to miniaturize the drive portion 52 as much as possible while ensuring the getting-on and -off performance of the vehicle seat device 2. Hereinafter, after explaining the basic structure (fixed portion 10, sliding portion 20, base portion 30, support portion 40, outer sliding mechanism 55, seat body 60) of the vehicle seat device 2 shown in Figure 2 etc., the structure of the deformation member 70 shown in Figure 6 etc. will be described in detail.

[0025] [Fixed Portion and Sliding Portion]

[0026] First, Figure 2The fixed part 10 shown supports the sliding part 20 in a state of being fixed to the vehicle floor 3 so as to be able to slide back and forth. Here, the sliding part 20 is a workbench-shaped (plate-shaped) part configured to be able to slide in the vehicle front-rear direction. Moreover, on the left and right sliding rails 14 fixed to the fixed part 10, a pair of front and rear sliding members 14s fixed to the sliding part 20 are respectively fitted in a slidable state (in Figure 2 , for the sake of convenience of explanation, only the corresponding symbols are marked for each component on the left side). In addition, between the fixed part 10 and the sliding part 20, a sliding drive mechanism 16 for sliding the sliding part 20 back and forth is provided. This sliding drive mechanism 16 can slide the sliding part 20 back and forth by the screwing action of the trapezoidal thread 16w and the nut 16n. Further, between the sliding part 20 and the seat main body 60 (the frame side wall part 62w described later), a sliding locking mechanism 22 for locking the back-and-forth sliding of the sliding part 20 is provided.

[0027] [Base part]

[0028] Next, Figure 2 The base part 30 shown is a workbench-shaped part that supports the support part 40 described later, and is disposed on the above-mentioned sliding part 20 via a rotation mechanism 23. Here, the rotation mechanism 23 includes an inner wheel 23e and an outer wheel 23r configured to be able to rotate relative to each other, and the inner wheel 23e is fixed to the sliding part 20, and the outer wheel 23r is fixed to the base part 30. In addition, on the sliding part 20, a motor and a gear mechanism (not shown) serving as a drive source of the rotation mechanism 23 are provided, and the gear of this gear mechanism meshes with the outer wheel 23r. And by rotating the outer wheel 23r relative to the inner wheel 23e fixed to the sliding part 20, the base part 30 to which this outer wheel 23r is fixed can horizontally rotate by about 90° between the seating position and the getting-on-and-off position (refer to Figure 1 and Figure 3 ).

[0029] [Support part]

[0030] Next, Figure 2The support portion 40 shown is a portion that supports the seat body 60 in a state supported by the base portion 30 so as to be able to move forward and backward between the first state and the second state. The support portion 40 includes a sliding member 41, a lifting and sliding mechanism 43, a pair of left and right four-link mechanisms (hereinafter referred to as the four-link mechanism 45), a lifting base 50, and a drive portion 52. Here, the sliding member 41 is provided on the base portion 30 in a state capable of sliding in the front-rear direction of the seat, and can withstand the operation of the lifting and sliding mechanism 43 and slide in the front-rear direction of the seat. The lifting and sliding mechanism 43 is a drive mechanism that utilizes the screwing action of the trapezoidal thread portion 43w and the nut portion 43n. The trapezoidal thread portion 43w is supported on the base portion 30 side, and the nut portion 43n is fixed on the sliding member 41 side. In addition, on the base portion 30, a drive portion 52 that serves as a drive source for the lifting and sliding mechanism 43 is provided. By using the driving force of the drive portion 52 to move the nut portion 43n relative to the trapezoidal thread portion 43w in the front-rear direction of the seat, the sliding member 41 provided with the nut portion 43n moves forward and backward relative to the base portion 30 (refer to Figure 4 and Figure 5 ). And, referring to Figure 2 and Figure 5 , at the base end portion (the end portion on the vehicle inner side in the getting-on and off position) of the four-link mechanism 45, the four-link mechanism 45 is pivotally connected to the sliding member 41 in a manner capable of rotating up and down (in each drawing, for the sake of convenience of explanation, the symbol 45 corresponding to the left four-link mechanism is marked, and the symbol corresponding to the right four-link mechanism is marked in parentheses).

[0031] In addition, referring to Figure 2 and Figure 5 , at the top end portion (the end portion on the vehicle outer side in the getting-on and off position) of the four-link mechanism 45, a workbench-shaped lifting base 50 is pivotally connected in a manner capable of rotating up and down. Here, the lifting base 50 is arranged on the base portion 30 on the vehicle outer side compared with the sliding member 41 in the first state. And, on the lifting base 50, a seat body 60 is provided via an outer sliding mechanism 55 (the detailed content will be described later). In the above structure, as Figure 5 shows, when the sliding member 41 in the first state moves forward to the front side of the seat by the operation of the lifting and sliding mechanism 43 (the drive performed by the drive portion 52), the four-link mechanism 45 rotates downward due to the weight of the seat body 60 and the like. As a result, the lifting base 50 and the seat body 60 move forward to the vehicle outer side relative to the base portion 30 and descend to the vehicle lower side at the same time, thus becoming the second state in which they are separated from the base portion 30. In addition, when from Figure 5When the sliding member 41 starts to move backward toward the rear side of the seat from the state shown, the four-link mechanism 45 rotates upward toward the upper side of the vehicle while moving backward. As a result, the lifting base 50 and the seat body 60 move backward toward the inner side of the vehicle and rise toward the upper side of the vehicle, and thus are configured in the first state on the base portion 30 (see Figure 4 ).

[0032] [Seat body and outer sliding mechanism]

[0033] Next, Figure 2 The seat body 60 shown is provided on the lifting base 50 of the support portion 40 via the outer sliding mechanism 55. Here, the seat body 60 includes a seat cushion 64 and a seat backrest 66, and a pair of left and right frame side wall portions 62w are provided on the seat frame 62 of the seat cushion 64 (in Figure 2 , for ease of explanation, the symbol 62w corresponding to the left frame side wall portion is marked, and the symbol corresponding to the right frame side wall portion is marked in parentheses). Further, an outer sliding mechanism 55 is provided on the lower surface side of the seat frame 62. The outer sliding mechanism 55 is a mechanism for sliding the seat body 60 in the front-rear direction of the seat with respect to the lifting base 50 of the support portion 40. And the outer sliding mechanism 55 has a rack 55r on the seat frame 62 side and a pinion 55p rotated by a motor (not shown) provided on the lifting base 50. In the above structure, the pinion 55p of the lifting base 50 rotates, so that the rack 55r on the seat frame 62 side moves forward (moves backward when reversed). As a result, the seat body 60 provided with the seat frame 62 can move forward and backward in the front-rear direction of the seat, that is, move forward and backward in the vehicle inner-outer direction at the getting-on / off position (see Figure 3 , Figure 4 ).

[0034] [Deformable member]

[0035] And, Figure 6The deformable member 70 shown is a rod-shaped (linear) member extending in the vehicle interior-exterior direction in the raised and lowered positions, and is capable of deforming from a shortened basic state to an elastically elongated deformed state. The deformable member 70 can elastically return from the deformed state to the basic state in the free state without being loaded. As such a deformable member 70, for example, spring-like members (coil springs, leaf springs, torsion bars, etc.) that elastically elongate and deform, damper-like members, and telescopic members such as rubber or elastomers can be exemplified. Further, in the vehicle seat device 2, the proximal end side of the deformable member 70 is pivotally supported on the first bracket 700 of the base portion 30 in a state capable of pivoting up and down. In addition, the distal end side of the deformable member 70 is pivotally supported on the second bracket 701 on the support portion 40 side (e.g., the elevating base 50) in a state capable of pivoting up and down. In the above structure, the seat body 60 moves from the first state to the second state, and as the gap 100 in the vehicle width direction between the seat body 60 and the base portion 30 increases, the deformable member 70 will gradually elongate and deform. At this time, as the seat body 60 descends toward the lower side of the vehicle, the deformable member 70 elongates and deforms between the seat body 60 and the base portion 30 while gradually tilting outward and downward of the vehicle.

[0036] [Operation state of vehicle seat device when occupants get on and off the vehicle]

[0037] And, in Figure 3 and Figure 4 In the vehicle seat device 2 shown, the seat body 60 at the getting-on and -off position moves forward relative to the elevating base 50 as described above. As a result, the seat body 60 becomes the first state at the end on the outer side of the vehicle (the forward limit position on the base portion 30) disposed on the base portion 30. Next, referring to Figure 5 , by driving the support portion 40 using the drive portion 52, the seat body 60 supported by the support portion 40 becomes the second state separated from the base portion 30 as compared with the first state. At this time, from the viewpoint of ensuring getting-on and -off performance, as the seat body 60 in the second state is slid out outward and downward of the vehicle relative to the base portion 30, a gap 100 in the vehicle interior-exterior direction is generated between the seat body 60 and the base portion 30. In such a structure, it is desirable to slide out the seat body 60 significantly so as to generate the gap 100, etc., so that the drive portion 52 can be miniaturized as much as possible while ensuring getting-on and -off performance. Therefore, in Figure 6In the above-described structure, the deformable member 70 that has been elastically deformed is provided to follow at least one of the seat body 60 and the support portion 40 that moves forward and backward between states. Thus, when the deformable member 70 returns to its original basic state, the seat body 60 is urged in the forward and backward movement direction. According to the above structure, through the operation of the support portion 40 realized by the drive portion 52 and the force of the deformable member 70 that desires to return to its original state (the restoring force that becomes the auxiliary force), the seat body 60 moves forward and backward between states. Therefore, the operation state and function of the deformable member 70 will be specifically described together with the operation state of the seat body 60 during movement between states.

[0038] [Operation State and Function of Deformable Member]

[0039] First, as Figure 4 shown, the seat body 60 in the above-described first state is disposed at the forward limit position on the base portion 30. Thus, when the seat body 60 is on the base portion 30, since substantially no gap is generated between these members, the deformable member 70 is maintained in its shortened basic state (refer to Figure 8 . In addition, in the Figure 4 shown first state, since only the seat body 60 moves forward, the position of the lifting base 50 does not move from the Figure 8 position). Next, referring to Figure 5 , through the operation of the lifting slide mechanism 43 (driving implemented by the drive portion 52), the lifting base 50 and the seat body 60 move forward toward the outside of the vehicle and downward toward the lower side of the vehicle relative to the base portion 30, and then become the second state in which they are detached from the base portion 30. Moreover, through the forward movement of the seat body 60 and the like between states, the gap 100 between the seat body 60 and the base portion 30 gradually becomes larger. As a result, the deformable member 70 provided between the seat body 60 side (lifting base 50) and the base portion 30 gradually undergoes elongation deformation following the seat body 60 and the like, and thus its restoring force (auxiliary force) can be accumulated. At this time, as the four-link mechanism 45 that supports the seat body 60 rotates downward toward the lower side of the vehicle, the deformable member 70 undergoes elongation deformation while gradually tilting toward the outside and lower side of the vehicle.

[0040] Next, referring to Figure 6 and Figure 7, by the operation of the support portion 40 driven by the drive portion 52, the seat body 60 in the second state after the occupant (not shown) is seated moves backward toward the base portion 30 side. Further, in the vehicle seat device 2, by connecting the deformed member 70 in the deformed state to the seat body 60 and the support portion 40 (lifting base 50), the deformed member 70 returns to its original basic state while following the backward movement between these members. Therefore, by applying the force (elastic restoring force) of the deformed member 70 that desires to return to its original state to the seat body 60 and the support portion 40 during the backward movement, the seat body 60 can be urged in the backward movement direction. In particular, the deformed member 70 of the present embodiment is rotated upward toward the upper side of the vehicle by the four-link mechanism 45 that supports the seat body 60, and thus gradually shortens while tilting inward and upward of the vehicle. Accordingly, by the elastic restoring force of the deformed member 70, the seat body 60 moving backward can be urged inward and upward of the vehicle to be pulled toward the base portion 30 side. According to the above structure, by adding the urging force (auxiliary force) of the deformed member 70 to balance the thrust of the drive portion 52 when the seat body 60 moves backward, a structure that contributes to reducing the thrust (maximum output) achieved by the drive portion 52 is obtained. Further, by returning the seat body 60 to the first state on the base portion 30, the deformed member 70 returns to its original basic state in which it is shortened (refer to Figure 8 ).

[0041] As described above, in the present embodiment, at least one of the seat body 60 and the support portion 40 that move forward and backward between states is urged in the forward and backward movement direction by the restoring force of the deformed member 70 that returns from the deformed state to its original basic state while following it. According to the above structure, when the seat body 60 moves between states, by obtaining the force of the deformed member 70 (restoring force that becomes an auxiliary force), the thrust of the drive portion 52 can be reduced. Therefore, according to the present embodiment, the drive portion 52 can be miniaturized as much as possible while ensuring the boarding and alighting performance of the vehicle seat device 2. Further, in the present embodiment, the force (auxiliary force) of the deformed member 70 can be stored or released by the forward and backward movement of the seat body 60 between states. Moreover, in the present embodiment, the function of the deformed member 70 can be used to urge the seat body 60 moving backward toward the first state inward or upward of the vehicle, thereby becoming a structure that further contributes to the miniaturization of the drive portion 52.

[0042] [Modified Example]

[0043] Here, the structure of the deformable member can adopt various structures in addition to the above-mentioned structure, and can be disposed at an appropriate position of the vehicle seat device 2. For example, referring to Figure 9 , the first deformable member 71 that can be elastically deformed can be disposed between the sliding member 41 (support portion 40) and the inner vertical wall portion 703 provided on the base portion 30 at a position closer to the vehicle interior than the sliding member 41. According to the above structure, the gap between the sliding member 41 and the inner vertical wall portion 703 is increased by the forward movement of the seat body 60, so that the first deformable member 71 can be elastically deformed and its force (auxiliary force) can be accumulated. Moreover, when the seat body 60 and the support portion 40 move backward, the first deformable member 71 returns to its original basic state while following the backward movement of the sliding member 41 of the support portion 40. Thus, by the restoring force of the first deformable member 71 that desires to return to its original state, the sliding member 41 (support portion 40) can be applied with a force in the backward movement direction. According to the above structure, by applying a force to the sliding member 41 by utilizing the function of the first deformable member 71, the seat body 60 that moves backward together with the sliding member 41 can be applied with a force.

[0044] In addition, in Figure 9 the vehicle seat device 2 shown, the second deformable member 72 that can be elastically shortened can be used. In the free state, the second deformable member 72 can return from the elastically shortened deformed state to the extended basic state. As such a second deformable member 72, spring-like members (such as compression coil springs or leaf springs) and damper-like members that can be elastically shortened and deformed can be exemplified. Moreover, the above-mentioned second deformable member 72 can be disposed, for example, between the sliding member 41 (support portion 40) and the outer vertical wall portion 704 provided on the base portion 30 at a position closer to the vehicle exterior than the sliding member 41. In the above structure, the gap between the sliding member 41 and the outer vertical wall portion 704 is decreased by the forward movement of the seat body 60, so that the second deformable member 72 can be shortened and deformed to accumulate its force (auxiliary force). Moreover, according to the above structure, when the seat body 60 and the support portion 40 move backward, the second deformable member 72 returns to its original basic state while following the backward movement of the sliding member 41 of the support portion 40. Thus, by the restoring force of the second deformable member 72 that desires to return to its original state, the seat body 60 that moves backward together with the sliding member 41 can be applied with a force.

[0045] [Embodiment 2]

[0046] Next, the vehicle seat device 2A of Embodiment 2 will be described. Although Figure 10The shown vehicle seat device 2A has the same basic structure as the vehicle seat device 2A of Embodiment 1, but is different from Embodiment 1 in that a flexible deformation member 74 capable of flexural deformation is provided. First, in the vehicle seat device 2A of the present embodiment, the base end portion of the four-link mechanism 45 is pivotally supported by the shaft portion 41A of the sliding member 41 so as to be able to rotate up and down. Therefore, a torsion spring-like flexible deformation member 74 is clamped on the shaft portion 41A that supports the four-link mechanism 45, and its free end abuts against the inner wall side of the sliding member 41. The flexible deformation member 74 in this state is flexurally deformed by the downward rotation of the four-link mechanism 45 and returns to the basic state by the upward rotation of the four-link mechanism 45. According to the above structure, when the sliding member 41 (support portion 40) moves forward, as the four-link mechanism 45 rotates downward about the shaft portion 41A, the flexible deformation member 74 will be flexurally deformed to accumulate its force (auxiliary force). And by driving the support portion 40 using the drive portion 52, the sliding member 41 (support portion 40) will move backward in a state of following (moving together with) the flexible deformation member 74. Next, as the four-link mechanism 45 that supports the seat main body 60 rotates upward on the vehicle, the flexible deformation member 74 will gradually return from the flexurally deformed state to the basic state. Thus, by making the elastic restoring force of the flexible deformation member 74 that desires to return to the original state be the auxiliary force for the upward rotation of the four-link mechanism 45, the seat main body 60 can be urged upward on the vehicle.

[0047] [Modification Example]

[0048] In addition, as the deformation member that undergoes flexural deformation, it is also possible to use Figure 10Another leaf spring-like deformable member 75 as shown. In this case, another leaf spring-like deformable member 75 that is formed into a substantially horizontal V shape in a side view is provided at the top end side of the base portion 30. Further, an abutment shaft portion 45A that extends in the vehicle width direction is provided with respect to the four-bar link mechanism 45, and the abutment shaft portion 45A is arranged to abut against the other deformable member 75. In the above structure, when the seat body 60 moves forward, it rotates downward through the four-bar link mechanism 45, so that the other deformable member 75 abuts against the abutment shaft portion 45A of the four-bar link mechanism 45. Moreover, the other deformable member 75 flexurally deforms (closes) in a manner following the downward rotation of the four-bar link mechanism 45, so that its force (auxiliary force) can be accumulated. Next, by driving the support portion 40 using the drive portion 52, the four-bar link mechanism 45 that supports the seat body 60 rotates upward toward the upper side of the vehicle. At this time, the deformed other deformable member 75 returns to its original basic state (a state of being opened into a horizontal V shape) while following the abutment shaft portion 45A. According to the above structure, by making the elastic restoring force of the other deformable member 75 that desires to return to its original state be the auxiliary force for the upward rotation of the four-bar link mechanism 45, the seat body 60 can be forced upward toward the upper side of the vehicle.

[0049] The vehicle seat device of the present embodiment is not limited to the above embodiment, and various other embodiments can also be adopted. Although the structures of the respective deformable members are illustrated in the present embodiment, it is not intended to limit the structures of the respective deformable members. For example, in a vehicle seat device, one of the deformable members of the respective embodiments and respective modification examples can be used, or a combination of multiple can be used. Moreover, a deformable member that undergoes elongation deformation can be applied to various vehicle seat devices in which the seat body moves forward and backward through the support portion, and when the outer sliding mechanism and the like are omitted, the deformable member can be provided between the base portion and the seat body. In addition, a deformable member that undergoes flexural deformation can also be applied to various vehicle seat devices. For example, a flexible deformable member can be provided on the top end side of the four-bar link mechanism. Further, by providing the other deformable member below the top end of the base member, the seat body that rotates downward toward the vehicle can be borne. In addition, the following method can also be adopted, that is, the other deformable member is provided on the lower surface side of the seat body, and the bearing portion provided at the top end of the base member is used for bearing. As long as the other deformable member has a portion that substantially elastically deforms, other portions can also be formed of a rigid material that is difficult to deform.

[0050] In addition, although an example of applying a force to the seat body moving backward has been described in the present embodiment, a structure for applying a force to the seat body moving forward may also be provided. That is, depending on the structure of the vehicle seat device, there may be a case where the size of its drive unit is selected based on the thrust when the seat body moves forward between states (in the range of the gap) when the occupant sits down. In this case, the deformable member gradually deforms as the seat body moves backward from the second state to the first state, and becomes the basic state as the seat body moves forward from the first state to the second state. In addition, the seat body may only move forward and backward, and does not necessarily have to rotate in the vehicle up-and-down direction. In addition, when the seat body at the getting-on and getting-off position moves forward and backward between states, it can move not only in the vehicle interior and exterior direction, but also in other directions (such as the front-back direction when looking down on the vehicle, etc.). Moreover, the basic structure of the vehicle seat device can also be appropriately changed, and does not necessarily have to be limited to the above structure. For example, the outer sliding mechanism may also be a structure in which the seat body moves forward and backward by using the rotational force of a lateral roller-shaped, tire-shaped, or spherical member.

Claims

1. A seat device for a vehicle, characterized in that, Comprising: A base portion capable of horizontal rotation; A support portion that supports the seat body in a manner that allows it to move forward and backward relative to the base portion; A drive portion that drives the support portion, wherein the seat body is displaced between a seating position facing the front of the vehicle and an entry / exit position facing the side of the vehicle by the horizontal rotation of the base portion, and the seat body at the entry / exit position moves forward and backward between a first state where it is disposed on the base portion and a second state where it is detached from the base portion compared to the first state by the drive of the support portion. Further, by causing a deformed member that has undergone elastic deformation to follow at least one of the seat body and the support portion that move forward and backward between the states, the seat body is urged in the forward and backward movement direction by the force when the deformed member returns to its original basic state.

2. The vehicle seat device according to claim 1, wherein the deformed member gradually deforms as the seat body moves forward from the first state to the second state, and returns to the basic state when the seat body moves backward from the second state to the first state.

3. The vehicle seat device according to claim 1 or 2, wherein the seat body at the entry / exit position moves backward toward the inside of the vehicle and above the vehicle to become the first state, and the deformed member is configured to urge the seat body in the second state in at least one of the directions toward the inside of the vehicle or above the vehicle.

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