JP2005306322A - Seat device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To lower the height in the cabin of a seat body in a seat device for a vehicle which is equipped with a rotation mechanism rotating the seat body between a vehicle front direction and a door opening part side direction, and a lift up mechanism 4 moving the seat body between the inside and outside of the cabin through a door opening part K. <P>SOLUTION: The height with respect to a vehicle floor of the seat body 10 is set to be lower by the amount corresponding to the height H by storing the moving bodies 23 to 23 engaging with a slide rail 22 in a recessed part provided at the lower surface of the side holder part of a seat cushion 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle seat device having a function for enabling, for example, an elderly person or a disabled person to easily get on and off a vehicle.

Conventionally, various devices have been applied to this type of seat device. For example, as disclosed in Japanese Patent Application Laid-Open No. 2002-178804, the seat device moves in the longitudinal direction of the vehicle. A rotation mechanism that horizontally rotates the seat body by about 90 ° between a position facing the front of the vehicle and a position facing the door opening, and the seat body directed toward the door opening by the rotation mechanism opens the door. There has been provided a lift-up mechanism that moves the vehicle while lowering the vehicle exterior through the section. By installing this vehicle seat device at the passenger seat position, for example, passengers in the passenger seat can easily get on and off the vehicle if they move between the wheelchair and the seat body outside the passenger compartment, for example. Can do.
As the lift-up mechanism, there are provided one using a four-bar linkage mechanism, one using a slide mechanism, and the like. This lift-up mechanism has the main function of moving the seat body out of the passenger compartment while lowering the seat body to a height closer to the road surface. Various attempts have been made to reduce the height of the seat body to the same level as other vehicle interior seats.
For example, the publication discloses a configuration using a slide mechanism as a lift-up mechanism. The slide mechanism in this lift-up mechanism has a pair of left and right slide rails curved in an arcuate shape on the seat body side in a convex direction, and a moving body assembled to the curved slide rail so as to be relatively movable. Installed on the slide support side (rotation base side), and further, a screw shaft that rotates with an electric motor as a drive source is rotatably arranged on the slide support side, and a nut that meshes with the screw shaft is attached to the seat body side By moving the left and right curved rails together with the seat body to the outside of the passenger compartment by starting the electric motor, the seat body is lowered to a height closer to the road surface than when the linear slide rail is used. It was configured to move outside the room.
JP 2002-178804 A

It was necessary to further improve the conventional vehicle seat device. That is, in the above conventional vehicle seat device, the rail that curves in an arc shape is attached to the lower surface side of the seat body in a convex direction upward, so that the height of the seat body in the passenger compartment is set low. Has a limit, and it was difficult to set the height to the same level as other seats in the vehicle interior.
The present invention has been made in view of this problem, and maintains the function of lowering the seat body to a height closer to the road surface by using a curved slide rail in the lift-up mechanism, and the height of the seat body in the vehicle interior. An object of the present invention is to provide a vehicular seat device that can be set lower than in the prior art.

For this reason, the present invention provides a vehicle seat device having a configuration described in each claim.
According to the vehicle seat device of claim 1, the moving body that meshes with the slide rail is a concave portion on the back surface side of the side hold portion provided so as to be raised on the side portion of the seat cushion, and upward from the lower surface of the seat cushion. Since it is arrange | positioned in the recessed part, the height of the seat cushion in a vehicle interior can be set lower compared with the case where it attaches to the lower surface of a seat cushion.
Side hold portions are provided on the left and right side portions of the seat cushion (seat portion) of the seat body so that the side hold portions are raised upward in order to enhance the holdability of the seated person. The seat cushion is manufactured by covering a seat pad (urethane foam pad) having cushioning properties with a skin. The both sides of the seat pad are formed so as to swell upward, and therefore, the side hold portion is formed by forming the back surface of the seat pad into a concave shape. By arranging the moving body in the recess on the back surface side of the seat pad and allowing the slide rail to pass through the recess, that is, the seat cushion is supported on the rotating mechanism side inside the recess, the moving body The seat body can be supported more compactly in the height direction than when the seat cushion is attached to the lower surface of the seat cushion and the seat cushion is supported by the lower surface. The thickness can be lowered.

According to the vehicle seat device of the second aspect, since the slide rail is curved in a direction that protrudes upward, when the seat body is moved to the outside of the passenger compartment, the slide rail is positioned lower than the linear slide rail. Can be lowered.
In this case, if a curved slide rail is attached to the lower surface (portion other than the concave portion) of the seat cushion so as to protrude upward, the height of the seat body is higher than that of the linear slide rail. However, according to the configuration of the second aspect, since the curved slide rail is disposed in the concave portion on the back surface side of the seat cushion, it is affected by the slide rail being disposed in an upward convex direction. The height of the seat body can be set low without any problem.
According to the vehicle seat device of the third aspect, it is possible to configure a driving mechanism for moving the seat body along the curved slide rail with a simple configuration. If a screw shaft mechanism is used instead of the rack and pinion mechanism, the screw shaft cannot be bent because it needs to be rotated around the shaft. For this reason, it is necessary to provide a mechanism (long groove hole) for absorbing the vertical displacement of the seat body between the drive mechanism using the linear screw shaft and the seat body. In this respect, the rack and pinion mechanism The structure can be simplified by using.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a vehicle M in which a vehicle seat device 1 according to the present embodiment is disposed in a passenger seat. The seat body 10 of the vehicle seat device 1 can be moved in the front-rear direction of the vehicle M (left-right direction in FIG. 1) by the front-rear moving mechanism 2, and the position facing the front of the vehicle and the door opening K by the rotation mechanism 3. It is possible to rotate between positions facing to the side. Further, the seat body 10 can be lowered to a height close to the road surface while moving to the outside of the passenger compartment through the door opening K by the operation of the lift-up mechanism 4 from the position facing the door opening K side by the rotating mechanism 3. Yes. In addition, the code | symbol D has shown the door for passenger seats in FIG. By opening the door D, the door opening K is opened.
The rough structure of each mechanism 2-4 which comprises the vehicle seat apparatus 1 is shown by FIG. The front-rear moving mechanism 2 includes front-rear slide rails 2a, 2a installed on the vehicle floor F parallel to each other in the vehicle front-rear direction, and a front-rear slide base that moves in the vehicle front-rear direction via both slide rails 2a, 2a. 2b, and a drive device 2c interposed between the front / rear slide base 2b and the vehicle floor F. The drive device 2c includes a screw shaft 2d that is rotatably supported on the vehicle floor F, an electric motor 2e that rotates the screw shaft 2d about its axis, and a nut that is attached to the front and rear slide base 2b and meshes with the screw shaft 2d. 2f. When the electric motor 2e is activated, the screw shaft 2d is rotated about the axis thereof, and the nut 2f and consequently the front / rear slide base 2b are moved in the vehicle front-rear direction, whereby the rotation mechanism 3, the lift-up mechanism 4 and the seat body 10 are moved in the vehicle front-rear direction. Move to.

A rotation mechanism 3 is attached on the front / rear slide base 2b. The rotation mechanism 3 includes an outer ring 3a and an inner ring 3b that are combined so as to be rotatable with respect to each other. An outer ring 3a is attached to the front / rear slide base 2b. A rotation base 3c is attached to the upper surface side of the inner ring 3b. A gear portion is formed on the outer peripheral surface of the inner ring 3b. The gear portion meshes with a pinion gear attached to the output shaft of the rotary motor 3d. For this reason, when the rotation motor 3d is activated, the inner ring 3b is rotated through the meshing of the pinion gear and the gear portion, whereby the rotation base 3c and, consequently, the lift-up mechanism 4 and the seat body 10 are rotated.
The seat body 10 includes a seat cushion 11 as a seat portion and a seat back 12 as a backrest. The seat back 12 is supported at the rear portion of the seat cushion 11 so as to be tiltable (can be reclined). Armrests 13 are supported on both sides of the seat back 12. A headrest 14 is provided on the upper portion of the seat back 12.
On the left and right side portions of the seat cushion 11, side holder portions 11 a and 11 a for enhancing the holdability of the seated person are formed so as to rise upward. The both side holder portions 11a and 11a are a well-known technique and will not be described in detail. However, the side holder portions 11a and 11a are integrally formed when a seat pad formed by foaming urethane resin is formed. As shown in FIG. 4, concave portions 11b and 11b are formed on the back surfaces of the side holder portions 11a and 11a. The recesses 11b and 11b are formed over almost the entire range from the front part to the rear part of the seat cushion 11. The slide mechanisms 20 of the lift-up mechanism 4 described below are accommodated in the recesses 11b and 11b, respectively.

The lift-up mechanism 4 is disposed between the rotation base 3 c and the seat body 10. The lift-up mechanism 4 includes a lift-up base 21 fixed to the upper surface of the rotation base 3c. Support wall portions 21a and 21a are provided on the left and right sides of the lift-up base 21 as viewed from the seated person so as to rise upward. Both supporting wall portions 21a, 21a are arranged in parallel to each other. Further, as shown in FIGS. 3 and 5, both the support wall portions 21 a and 21 a are provided over almost the entire range from the front portion to the rear portion of the seat body 10.
Slide rails 22 are respectively attached to the upper portions of the support wall portions 21a and 21a. Both slide rails 22 are curved in an arcuate shape. Both the slide rails 22 and 22 are fixed along the upper part of the support wall part 21a, respectively, so as to protrude upward. Two moving bodies 23 are engaged with the slide rails 22 so as to be movable.
Each of the moving bodies 23 to 23 is attached to a seat holder 15 attached along the lower surface of the rear side of the seat cushion 11. Both end portions of the seat holder 15 enter the both concave portions 11 b of the seat cushion 11. The moving bodies 23 to 23 are attached to both ends of the sheet holder 15 that has entered the recess 11b. The slide rail 22 and the moving bodies 23 and 23 meshing with the slide rail 22 constitute the slide mechanism 20. The seat main body 10 is supported by the lift-up mechanism 4 via both slide mechanisms 20 and 20 housed in the recess 11b of the seat cushion 11, respectively.

Next, both slide mechanisms 20, 20 are provided with a common drive mechanism 30. The drive mechanism 30 is disposed between the seat body 10 and the lift-up base 21. The drive mechanism 30 is a rack and pinion mechanism that operates using an electric motor 31 as a drive source. The drive mechanism 30 includes a pinion gear 32 that is rotated by the electric motor 31 and a rack 33 that meshes with the pinion gear 32. As shown in FIGS. 3 to 5, the electric motor 31 is attached to the upper surface of the lift-up base 21 at the center in the width direction and the front side in the front-rear direction. On the other hand, the rack 33 is attached to the center of the lower surface of the sheet holder 15 in the width direction. The rack 33 is curved with the same curvature as that of the slide rail 22 and is mounted in a direction that protrudes upward. Engagement teeth are formed on the lower surface side (curved inner side) of the rack 33, and the pinion gear 32 is engaged. The rear portion of the rack 33 is attached to the lower surface of the sheet holder 15. Therefore, as shown in FIGS. 3 and 5, the rack 33 is attached in a state where the front side gradually separates downward from the lower surface of the seat cushion 11.
When the electric motor 31 is started in the forward direction, the seat body 10 moves toward the outside of the passenger compartment while descending through the meshing of the pinion gear 32 and the rack 33. When the electric motor 31 is started in the reverse rotation direction with the seat body 10 moved to the outside of the vehicle compartment, the seat body 10 moves upward while moving upward.

According to the vehicle seat device 1 of the present embodiment configured as described above, the drive mechanism 30 operates in a state in which the seat body 10 is directed toward the door opening K, so that the seat body 10 is slid on both sides. The mechanisms 20 and 20 move downward while moving to the outdoor side, and conversely move upward while moving toward the passenger compartment. Since both the slide mechanisms 20 and 20 are accommodated in the recesses 11b and 11b formed on the lower surface side of the side holder portions 11a and 11a of the seat cushion 11, the height of the seat body 10 with respect to the vehicle floor F is lowered. be able to. This point is shown in FIG. 7 is the seat device 1 according to the present embodiment, and the moving bodies 23 to 23 of both the slide mechanisms 20 and 20 are accommodated in the recesses 11b of the seat cushion 11, respectively. On the other hand, when the moving bodies 23 'to 23' of the both slide mechanisms are attached to the lower surface of the seat cushion 11 (the lower surface of the seat holder 15) instead of the recess 11b as shown in the right side of FIG. The height of the sheet body 10 'is increased by the dimension H as compared with the present embodiment.
As described above, the slide mechanisms 20 and 20 for moving the seat body 10 between the vehicle interior and the exterior are attached using the recesses 11b and 11b formed on the lower surface side of the side holder portions 11a and 11a of the seat cushion 10. Therefore, the height of the seat body 10 with respect to the vehicle floor F can be lowered, and thus the seat body 10 can be set to the same height as other seats in the vehicle interior. Discriminating that you are seated on a different seat).

Various modifications can be made to the embodiment described above. For example, the front-rear moving mechanism 20 for moving the seat body 10 in the vehicle front-rear direction can be omitted.
Further, the lift-up mechanism 4 that is operated by the drive device 30 that uses the electric motor 31 as a drive source is illustrated. However, the lift-up mechanism 4 that omits the drive device 30 and moves the seat body 10 between the vehicle interior and the exterior by manual operation may be used. Good.
Furthermore, although the form which the slide rail 22 of the slide mechanism 20 curved was illustrated, the slide rail of linear shape (it is not curved) can also be used. In this case, the seat body 10 can be lowered while being moved to the outside of the passenger compartment by providing the slide rail so as to be inclined downward in the passenger compartment or by being provided to be tiltable in the same direction. When a linear slide rail is used, a screw shaft / nut mechanism can be used instead of the rack / pinion mechanism exemplified as the drive mechanism.
Furthermore, although the vehicle seat device 1 installed at the front passenger seat is illustrated, it can be set as a driver seat, a second row seat, or a seat at another position.

1 is a plan view of a vehicle in which a vehicle seat device according to an embodiment of the present invention is set at a passenger seat position. It is the rear view which looked at the vehicle seat device concerning this embodiment from the arrow (2) direction in FIG. This figure shows a state in which the seat body 10 is located in the front direction of the vehicle. It is the rear view which looked at the vehicle seat device concerning this embodiment from the arrow (2) direction in FIG. This figure has shown the state by which the sheet | seat main body 10 was orient | assigned to the door opening part side. It is the side view which looked at the vehicle seat device concerning this embodiment from the direction of arrow (4) in Drawing 3, and is a front view of a lift-up mechanism. In this figure, the seat cushion is shown in a longitudinal sectional view. It is a figure which shows the vehicle seat apparatus which concerns on this embodiment. This figure has shown the state which the seat main body moved to the vehicle compartment outer side. It is a figure which shows a mode that a seat main body moves between vehicle interior and exterior, and a mode that the rack accompanying this moves. It is a figure which compares and shows the case where a slide mechanism is attached to the lower surface of a seat cushion, and the vehicle seat apparatus which concerns on this embodiment. This figure shows that the seat body of the vehicle seat device according to the present embodiment is lowered by a height H.

Explanation of symbols

M ... Vehicle, F ... Vehicle floor, D ... Passenger seat door, K ... Door opening 1 ... Vehicle seat device 2 ... Front / rear movement mechanism 2a ... Front / rear slide rail, 2b ... Front / rear slide base, 2c ... Drive device, 2d ... Screw shaft 2e ... Electric motor, 2f ... Nut 3 ... Rotating mechanism 3a ... Outer ring, 3b ... Inner ring, 3c ... Rotating base 4 ... Lift-up mechanism 10 ... Seat body 11 ... Seat cushion, 11a ... Side holder part, 11b ... Concave part 12 ... seat back 13 ... armrest 14 ... headrest 15 ... seat holder 20 ... slide mechanism 21 ... lift-up base, 21a ... support wall 22 ... slide rail 23 ... moving body 30 ... drive mechanism 31 ... electric motor 32 ... pinion gear 33 ... rack

Claims (3)

A seat body, a rotation mechanism for horizontally rotating the seat body between a position facing the front of the vehicle and a position facing the door opening, and the seat body integrated with the seat body between the rotation mechanism and the seat body A vehicle seat device including a lift-up mechanism that is interposed so as to rotate and moves down toward the outside of the passenger compartment while moving the seat body directed toward the door opening by the rotation mechanism. ,
The lift-up mechanism includes a slide rail and a movable body that is movably engaged with the slide rail, the slide rail is fixed to the rotating mechanism side, and the movable body is a seat cushion of the seat body. The vehicle seat apparatus arrange | positioned in the recessed part by the side of the back surface of the side holder part provided by raising in the side part.   The vehicle seat device according to claim 1, wherein the slide rail is curved in a bow shape, and the slide rail is fixed in a direction in which the upper side is convex.   2. The vehicle seat device according to claim 1, wherein the lift-up mechanism includes an electric motor provided on one side of the rotation mechanism or the seat body, a pinion gear rotated by the electric motor, and the other side. And a drive mechanism having a rack with which the pinion gear meshes with the rack, the rack being curved with the same curvature as the slide rail, and mounted on the seat body side in a direction protruding upward. Sheet device.

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