JP2008087646A - Rotation device for vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotation device for a vehicular seat which enhances a degree of freedom in setting the central position of the rotation of the seat. <P>SOLUTION: First and second left front guide parts 51, 52, first and second right front guides parts 53, 54, and first and second rear guides 55, 56 are formed in a swivel lower 31. Each guide part 51-56 is formed on each concentric circle 61-66 around a virtual center point 43. A curved part 72 is formed at the right edge of the lower opening 71 of the swivel lower 31 and a gear part 75 is formed in the curved part 72. Guiding parts 91-93 to be guided are movably supported by respective guide parts 51-56 and each guiding part 91-93 to be guided is fixed to a swivel upper 32. A drive part 134 is located at the swivel upper 32 and a drive gear 156 rotated by a drive motor 151 is engaged with the gear part 75 of the swivel lower 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle seat rotation device that rotates and moves a seat provided in a vehicle.

  Conventionally, as shown in FIG. 7, a vehicle seat rotation device 801 that assists in getting on and off a vehicle is known (see, for example, Patent Document 1). The seat 802 facing toward the vehicle can be turned toward the door opening side on the side of the vehicle.

Such a rotation mechanism 811 of the vehicle seat rotation device 801 includes a rotation center shaft 813 having a gear shape 812 on the outer peripheral portion, and the gear shape 812 is configured to move following the translation gear shape 814. ing. As a result, the seat 802 is configured to be able to achieve outside-sliding interlocking rotation.
JP 2004-34908 A

  However, in such a vehicle seat rotation device 801, the rotation center shaft 813 needs to be disposed in the rotation device structure because of the structure in which the seat 802 is supported by the rotation center shaft 813.

  For this reason, the rotation center of the seat 802 cannot be disposed outside the rotating device structure, and the seat 802 may interfere with a center console, a trim, or the like during rotation. In this case, in order to avoid this, a dedicated sheet having a narrow width is required.

  On the other hand, when establishing a rotation-linked slide, many parts such as a slide rail are required, which leads to a complicated structure and a problem that costs are increased due to the difficulty of stable quality associated therewith.

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a vehicle seat rotation device that can give a degree of freedom in setting a rotation center position of a seat. is there.

  In order to solve the above-mentioned problem, in the vehicle seat rotating apparatus according to claim 1 of the present invention, in the vehicle seat rotating apparatus provided with a moving mechanism that supports the seat so that the seat is movable, the moving mechanism is the seat. A swivel upper that constitutes the side, and a swivel lower that movably supports the swivel upper, and a guide portion that extends along the movement locus of the seat and a guided portion that is guided by the guide portion A structure is provided in the moving mechanism, and a rotation region extending in a curved shape is set in the guide portion.

  That is, the moving mechanism that supports the sheet includes a guide structure that includes a guide portion that extends along the movement locus of the sheet, and a guided portion that is guided by the guide portion. By being guided by the guide portion, the sheet is moved along a movement locus formed by the guide portion.

  At this time, a rotation area extending in a curved shape is set in the guide portion, and the sheet is rotationally moved along the rotation area of the guide portion.

  In the vehicle seat rotation device according to claim 2, when the center point for rotationally moving the seat is assumed, the rotation region is set on an arc centered on the virtual center point.

  Thereby, the sheet is rotated about the virtual center point without providing a rotation axis in the moving mechanism.

  Further, in the vehicle seat rotation device according to the third aspect, a slide region extending linearly is set in the guide portion.

  Thereby, the sheet moves on a straight line along the slide region set in the guide portion.

  In addition, in the vehicle seat rotation device according to claim 4, a gear portion extending along the movement locus of the seat, a drive gear meshing with the gear portion, and a drive for rotating the drive gear A drive mechanism including a motor is provided.

  That is, the seat can be moved along the guide portion by rotating the drive gear with the drive motor and relatively moving the drive gear side and the gear portion side.

  At this time, when the rotation region and the slide region are set in the guide portion, the sheet is linearly moved in the slide region of the guide portion, while the sheet is rotated in the rotation region of the guide portion. The

  In the vehicle seat rotating device according to the fifth aspect, a low friction coefficient component for reducing friction generated between the swivel upper and the swivel lower during movement is disposed between the swivel upper and the swivel lower.

  That is, a low friction coefficient part is disposed between the swivel upper and the swivel lower, and the friction generated between the swivel upper and the swivel lower is reduced by the low friction coefficient part.

  As described above, in the vehicle seat rotating device according to the first aspect of the present invention, the seat can be rotationally moved along the rotation region set in the guide portion.

  For this reason, compared with the conventional case in which the seat is rotated around the rotation center axis, the setting of the rotation center position of the seat can be given a degree of freedom, and a virtual center point set outside the structure A rotational movement of the sheet around the center can also be realized.

  Thereby, even if it is a general sheet | seat, interference of a sheet | seat with a center console, a trim, etc. can be avoided, and a narrow exclusive sheet | seat becomes unnecessary.

  In addition, it is possible to provide a degree of freedom in setting the seat movement trajectory and in the interior layout of the vehicle, and to provide optimum specifications.

  In the vehicle seat rotation device according to claim 2, the rotation region is set on an arc centered on the virtual center point, so that the moving mechanism is not provided with a rotation axis, and the seat is moved to the virtual seat. It can rotate around the center point.

  Furthermore, in the vehicle seat rotation device according to the third aspect, the seat can be moved on a straight line along the slide region by setting a slide region extending linearly in the guide portion.

  For this reason, compared with the conventional case where a slide rail must be provided in addition to the rotation center shaft, the linear movement and the rotational movement of the seat can be established without incurring the number of parts and the complexity of the structure. it can.

  In addition, in the vehicle seat rotating device according to claim 4, the driving gear is rotated by the driving motor, and the driving gear side and the gear portion side are relatively moved, thereby the seat. Can be moved along the guide portion.

  At this time, when the rotation region and the slide region are set in the guide portion, the sheet can be linearly moved in the slide region of the guide portion, while in the rotation region of the guide portion, The sheet can be rotated.

  Therefore, one drive motor can be used for both linear movement and rotational movement of the seat.

  Further, in the vehicle seat rotating device according to claim 5, by disposing a low friction coefficient component between the swivel upper and the swivel lower, the friction generated between the swivel upper and the swivel lower is reduced. Can be reduced with coefficient parts.

  Thereby, the load on the drive source can be reduced.

  (First embodiment)

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 and 2 are views showing a vehicle seat rotation device 1 according to the present embodiment. FIG. 1 shows an exploded perspective view thereof, and FIG. 2 shows a plan view thereof. Has been.

  The vehicle seat rotation device 1 is installed in a driver's seat of a vehicle, and a front-facing state in which the seat 11 constituting the driver's seat faces the front FR of the vehicle, and the door opening portion OTR provided on the right side. It is configured to be able to rotate between the horizontal orientation.

  Reference vehicle slide rails 22, 22 extending in the vehicle longitudinal direction are fixed to the vehicle body floor 21 of the vehicle, and sliders 23, 23 are movably supported on the slide rails 22, 22. Has been. Connection plates 24 and 24 are fixed to the sliders 23 and 23, and a moving mechanism 25 that supports the sheet 11 is fixed between the connection plates 24 and 24.

  The moving mechanism 25 includes a swivel lower 31 supported by both the connecting plates 24 and 24, and a swivel upper 32 supported movably by the swivel lower 31. The swivel upper 32 is used for a standard vehicle. A seat leg for fixing the seat cushion 33 of the seat 11 is configured.

  As shown also in FIG. 3, the swivel lower 31 is formed in a longitudinally long rectangular shape by a metal plate, and is formed in a container shape opened downward. The top surface 41 of the swivel lower 31 is formed with a rectangular cutout 42 that is retracted in accordance with the shape of the vehicle body at the right rear corner, and on the right side of the rectangular cutout 42 is the seat 11. Is rotated, the virtual center point 43 serving as the center of rotation is virtually set by design.

  The top surface 41 of the swivel lower 31 is formed with a first left front guide portion 51 and a second left front guide portion 52 that form a pair on the left front side, and both guide portions 51, 52 are formed in a groove shape. It is comprised by the made opening part. A pair of first right front guide part 53 and second right front guide part 54 are formed on the right front side of the top surface 41, and both guide parts 53, 54 are also openings formed in a groove shape. It is constituted by. Further, a first rear guide portion 55 and a second rear guide portion 56 that form a pair are formed on the right rear side of the top surface 41, and both guide portions 55, 56 are also formed in a groove shape. It is comprised by the opening part.

  Each of the guide portions 51 to 56 is formed on each of the concentric circles 61 to 66 with the virtual center point 43 as a center, and constitutes a rotation region extending in a curved shape over the entire area. Is extended along the movement trajectory of the sheet 11 that is rotated around the center of the sheet 11. Thereby, each said guide parts 51-56 are provided on the movement locus | trajectory which the corresponding site | part of the said swivel upper 32 which opposes, when rotating the said sheet | seat 11 between the said front-facing state and the said sideways state. It is set to a length that encompasses the movement range of each corresponding part.

  On the left side of the swivel lower 31 near the rear, a vertically long lower opening 71 is formed in the front-rear direction, and a curved portion 72 protruding inward is formed on the right edge of the lower opening 71. Yes. The curved portion 72 has a rotation drive region 73 extending concentrically around the virtual center point 43 and a linear extending lead-in region 74 continuous to the rear end of the rotation drive region 73. As shown in FIG. 1, a continuous tooth-shaped gear portion 75 is formed in the curved portion 72.

  A motor guide 81 is fixed to the back side of the top surface 41 as shown in FIGS. The motor guide 81 is configured by a substantially L-shaped plate extending along the curved portion 72, and is opposed to the rotational drive region 73 of the curved portion 72 on the side edge of the motor guide 81. A rotational drive region facing portion 83 extending in an arc shape, a retracting region facing portion 84 extending linearly facing the pulling region 74 of the bending portion 72, and a base of the pulling region facing portion 84. A stopper portion 85 that is bent from the end toward the bending portion 72 is formed. A passage 86 whose width dimension is kept constant over the entire area between the rotation drive region 73 and the rotation drive region facing portion 83 and between the pulling region 74 and the pulling region facing portion 84. The stopper portion 85 is extended in the transverse direction of the passage 86.

  A first guided portion 91 guided by both guide portions 51, 52 is movably supported by the left front guide portions 51, 52, and both guide portions are also provided by the right front guide portions 53, 54. A second guided portion 92 guided by 53 and 54 is movably supported. In addition, a third guided portion 93 guided by the both guide portions 55 and 56 is also movably supported by the both rear guide portions 55 and 56.

  As shown in FIG. 4, each of the guided portions 91 to 93 is disposed on the lower locus holding plate 101 disposed on the back side of the top surface 41 of the swivel lower 31 and on the front side of the top surface 41. The upper trajectory holding plate 102 is provided.

  Both the trajectory holding plates 101, 102 are formed in a rectangular plate shape, and the two trajectory holding plates 101, 102 are provided with two spaced bolt insertion holes 103,. Accordingly, the neck portion 105 of the bolt 104 inserted into the bolt insertion hole 103, 103 of the lower locus holding plate 101 is loosely fitted to the corresponding guide portion 63, 64, and the upper locus disposed on the upper side. After being inserted into the bolt insertion hole 103 of the holding plate 102, it can be inserted into the tight hole 106 provided in the swivel upper 32, and a nut 107 is screwed into a portion extending from the tight hole 106. Then, by fixing the position with the lock nut 108, the guided portions 91 to 93 guided by the corresponding guide portions 51 to 56 can be fixed at predetermined positions of the swivel upper 32.

  .. Are formed in the side portions of the respective bolt insertion holes 103,... In the both trajectory holding plates 101, 102, and each of the mounting holes 111,. The neck portions 113,... Of 112,. The smoothers 112 are attached so that their heads 114 are arranged on the top surface 41 side of the swivel lower 31, and the flat surface of the head 114 is attached to the swivel lower 31. It is configured to be in sliding contact.

  These smoothers 112,... Are made of, for example, a synthetic resin, and are configured so as to reduce the frictional resistance at the time of sliding contact with the swivel lower 31 formed of a metal plate. As a result, each of the smoothers 112,. Is configured.

  As shown in FIG. 1, the swivel upper 32 is formed in a longitudinally long rectangular shape by a metal plate, is formed in a container shape that opens downward, and at its front end portion A footrest mounting part 121 is provided.

  An upper opening 132 is formed in the left rear portion of the bottom surface 131 of the swivel upper 32, and stud bolts 133,... Protrude from three locations on the outer periphery of the upper opening 132. . Thereby, the drive part 134 which drives the said vehicle seat rotation apparatus 1 by this stud bolt 133, ... is comprised so that it may attach.

  As shown in FIGS. 1 and 3, the driving unit 134 includes a bracket 141, and elongated holes 142,... Extend in parallel with the bracket 141. In each of the long holes 142,..., Nuts 143,... Into which the stud bolts 133 are screwed are movably supported. 142,... So that they can move along.

  The bracket 141 is provided with a drive motor 151, and the output from the drive motor 151 is transmitted to the drive gear 156 via the speed reducer 152. The drive gear 156 is configured to mesh with the gear portion 75 of the lower opening 71 provided in the swivel lower 31 with the swivel upper 32 attached to the swivel lower 31. A drive mechanism is configured.

  Accordingly, when the drive gear 156 is rotated by the drive motor 151, the drive gear 156 is guided along the passage 86 between the gear portion 75 and the motor guide 81 and moves along the gear portion 75. The swivel upper 32 is configured such that the drive gear 156 moves along the rotational drive region 73 when the drive gear 156 is positioned in the rotational drive region 73 of the gear portion 75. Is rotated with respect to the swivel lower 31 so that the seat 11 supported by the swivel upper 32 can be rotated around the virtual center point 43. Further, when the drive gear 156 reaches the retraction area 74 of the gear portion 75, the bracket 141 of the drive section 134 is moved to the length so that the drive gear 156 moves along the retraction area 74. Is configured to slide in the extending direction of the holes 142,..., And is configured to stop while the drive gear 156 is in contact with the stopper portion 85 of the motor guide 81.

  In the present embodiment according to the above configuration, the moving mechanism 25 that supports the seat 11 of the driver's seat includes the guide portions 51 to 56 of the swivel lower 31 that extend along the movement locus of the seat 11 and the guide portions. A guide structure including guided portions 91 to 93 guided by 51 to 56 is provided, and the swivel upper 32 is guided by the guided portions 91 to 93 being guided by the guide portions 51 to 56. The sheet 11 supported by the guide 11 is moved along a movement locus formed by the guide portions 51 to 56.

  At this time, each of the guide portions 51 to 56 forms a rotation area whose entire region is formed in an arc shape and extends in a curved shape, and each of the guides that the rotation drive area constitutes the sheet 11. It can rotate along the parts 51-56.

  Therefore, it is possible to give a degree of freedom to the setting of the rotation center position of the seat 11 as compared with the conventional case in which the seat is rotated about the rotation center axis, and the swivel lower 31 or the like as in the present embodiment. The rotational movement of the seat 11 about the virtual center point 43 set outside the structure such as the swivel upper 32 can be realized.

  Thereby, even if it is the general seat 11, the interference of the seat 11 to the center console, the trim, etc. provided in the vehicle interior can be avoided, the narrow dedicated seat is not necessary, and the reference vehicle By using the sheet, the appearance is improved.

  In addition, it is possible to set the movement trajectory of the seat 11 and the degree of freedom in the vehicle interior layout, provide an optimum specification, and realize a slide trajectory having an inclination in the vehicle longitudinal direction. be able to.

  The guide portions 51 to 56 constituting the rotation region are set on concentric circles 61 to 66 with a virtual center point 43 set outside the swivel lower 31 as a center. As a result, the sheet 11 can be rotated around the virtual center point 43 without providing a rotation axis in the moving mechanism 25.

  Further, the swivel lower 31 is formed with a gear portion 75 extending along the movement trajectory of the seat 11, while the swivel upper 32 has a drive gear 156 meshing with the gear portion 75, and the drive A drive unit 134 including a drive motor 151 that rotates the gear 156 is provided to constitute a drive mechanism.

  Thus, the drive gear 151 is rotated by the drive motor 151, and the swivel upper 32 on the drive gear 156 side and the swivel lower 31 on the gear portion 75 side are relatively moved, whereby the seat 11 is moved. It can move along each guide part 51-56.

  The swivel upper 32 is rotatably supported by the swivel lower 31 via the guided portions 91,..., And the guided portions 91 fixed to the swivel upper 32,. · Is configured such that the smoothers 112,..., Which are low friction coefficient components, are in sliding contact with the swivel lower 31.

  That is, each of the smoothers 112,... Is disposed between the swivel upper 32 and the swivel lower 31, and the friction generated between the swivel upper 32 and the swivel lower 31 is reduced by the smoothers 112,. Can be reduced by.

Thereby, the load on the drive motor 151 can be reduced.

  (Second Embodiment)

  FIG. 5 is a view showing a second embodiment of the present invention, in which the respective guide portions 52, 54, 56 provided on the swivel lower 31 of the first embodiment are abolished and a circle is formed at the site. Arc-shaped low coefficient of friction parts 201 are provided.

  That is, on the swivel lower 31, as shown in FIG. 5B, a frame-shaped roller trajectory control plate 211 extending in an arc shape extends along the guide portions 51, 53, 55. The roller trajectory control plate 211 is formed in an arc shape with the virtual center point 43 as the center. Inside the roller trajectory control plate 211, a plurality of needle rollers 213,... Held by ladder-type roller guides 212,. The needle rollers 213,... Are restricted so that they can move on a concentric circle with the virtual center point 43 as the center. Thereby, each said low-friction coefficient component 201, ... is comprised.

  On the other hand, the bolt 104 is directly inserted into the guide portions 51, 53, and 55 of the swivel lower 31 via the washer 221, and the neck portion 105 of the bolt 104 inserted through the tight hole 106 of the swivel upper 32. The nut 107 and the lock nut 108 are screwed to each other.

  As a result, each of the needle rollers 213 receives a load of the swivel upper 32, and the needle rollers 213 roll between the swivel upper 32 and the swivel lower 31, The load on the drive motor 151 can be further reduced.

Therefore, it is possible to realize a reduction in size, weight, and cost of the mechanism.

  (Third embodiment)

  FIG. 6 is a diagram showing a third embodiment of the present invention.

  In the present embodiment, linear portions extending toward the rear of the swivel lower 31 are continuously formed at the end portions of the respective guide portions 51 to 56 of the first embodiment.

  As a result, each of the guide portions 51 to 56 has a rotation region 301 set on the concentric circles 61 to 66 centered on the virtual center point 43 and a linear shape extending in the front-rear direction. Slide areas 302,... Are formed.

  In this way, by setting the slide regions 302,... Extending linearly in the guide portions 51 to 56, the sheet 11 is placed on a straight line along the slide regions 302,. You can move back and forth.

  For this reason, the linear movement and the rotational movement of the seat 11 can be realized without complicating the number of parts and the structure as compared with the conventional case where a slide rail must be provided in addition to the rotation center axis. Therefore, it is possible to provide an inexpensive apparatus having a simple structure.

  Then, the drive gear 151 is rotated by the drive motor 151, and the swivel upper 32 on the drive gear 156 side and the swivel lower 31 on the gear portion 75 side are relatively moved, so that the seat 11 is moved to the respective positions. It can move along the guide parts 51-56.

  At this time, the sheet 11 can be linearly moved in the slide regions 302 of the guide portions 51 to 56, and in the rotation regions 301 of the guide portions 51 to 56, The sheet 11 can be rotated.

  Therefore, one drive motor 151 can be used for both linear movement and rotational movement of the seat 11.

It is a disassembled perspective view which shows one embodiment of this invention. It is a plane transparent view of the embodiment. It is a plane transparent view which shows the moving mechanism of the embodiment. It is sectional drawing along the AA line of FIG. It is the 2nd Embodiment of this invention, (a) is a perspective view of a swivel lower, (b) is sectional drawing along the BB line of (a). It is a figure which shows the 3rd Embodiment of this invention. It is a figure which shows the conventional vehicle seat rotation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat rotation apparatus 11 Seat 25 Movement mechanism 31 Swivel lower 32 Swivel upper 43 Virtual center point 51 1st left front guide part 52 2nd left front guide part 53 1st right front guide part 54 2nd right front guide part 55 1st rear guide part 56 Second rear guide portion 61 Concentric circle 75 Gear portion 91 First guided portion 92 Second guided portion 93 Third guided portion 112 Smoother 134 Drive portion 151 Drive motor 156 Drive gear 201 Low friction coefficient component 213 Needle roller 301 Rotation Area 302 Slide area

Claims (5)

In a vehicle seat rotating device including a moving mechanism that supports a seat so as to be movable,
The moving mechanism includes a swivel upper that constitutes the seat side and a swivel lower that movably supports the swivel upper, and is guided by the guide portion that extends along the movement locus of the seat and the guide portion. A vehicle seat rotation device characterized in that a guide structure including a guided portion is provided in the moving mechanism, and a rotation region extending in a curved shape is set in the guide portion.   2. The vehicle seat rotation device according to claim 1, wherein when the center point for rotationally moving the seat is assumed, the rotation region is set on an arc centered on the virtual center point.   The vehicular seat rotating device according to claim 1, wherein a linearly extending slide area is set in the guide portion.   2. A drive mechanism comprising a gear portion extending along a movement locus of the seat, a drive gear meshing with the gear portion, and a drive motor for rotating the drive gear. 4. The vehicle seat rotation device according to any one of items 1 to 3. 5. The low-friction coefficient component for reducing the friction generated between the swivel upper and the swivel lower during movement is disposed between the swivel upper and the swivel lower. Vehicle seat rotation device.

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