JP2015101295A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular seat which can suppress a slide resistance of a slide mechanism and can suppress engaging noise of a gear, even when a seat body slides relative to a base part by a drive mechanism.SOLUTION: A vehicular seat includes a seat body 1, a floor surface F (base part), and slide rails 11, 11. The vehicular seat includes a shaft 60 (extendable member) which is arranged outside of the slide rails 11, 11, has one end turnably attached to the seat body 1 side and the another end turnably attached to the floor surface F side, and is extended and contracted by displacing full length by drive of the drive mechanism provided with a hollow motor (driving source). The seat body 1 slides relative to the floor surface F through slide rails 11, 11 by extension and contraction of the shaft 60.

Description

  The present invention relates to a vehicle seat.

  Conventionally, a seat body on which a seated person is seated, a base that supports the seat body below the seat body, and a slide rail that is disposed between the seat body and the base and slidably connects the seat body and the base. A vehicle seat having the following is known. Here, as a technique in which the sheet main body slides with respect to the base, a mode in which driving of a driving mechanism is used is known. For example, the screw shaft is fixed inward of the lower rail in the left and right slide rails along the longitudinal direction, the drive gear box including the nut member is fixed to the upper rail in the left and right slide rails, and the screw shaft and the nut member are screwed. Combined state. The left and right drive gear boxes are connected with connecting rods to transmit the motor rotational force. As a result, the nut members of the left and right drive gear boxes rotate and move on the screw shaft, so that the left and right upper rails slide back and forth with respect to the lower rail. Since the screw shaft and the nut member only need to have a relative rotation relationship, a technique for rotating the screw shaft with respect to the fixed nut member is also known (for example, Patent Document 1).

International Publication No. 2011/027716

  However, in the above technique, the screw shaft and the nut member, which are the structure of the drive mechanism, are incorporated inside the slide rail. Therefore, there exists a concern that the rolling element which is a structure of a slide mechanism tends to become small, and the sliding resistance of a slide mechanism becomes large. In addition, since the drive mechanism is provided in each of the left and right slide mechanisms, there is a concern that the number of meshing gears such as a driving gear box increases and noise accompanying the meshing increases.

  The present invention has been devised in view of these points, and the problem to be solved by the present invention is that the sliding mechanism slides even when the seat body is slid with respect to the base by the drive mechanism. An object of the present invention is to provide a vehicle seat that can suppress dynamic resistance and noise associated with gear meshing.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
First, the first invention is a seat body on which a seated person sits, a base portion that supports the seat body below the seat body, and is disposed between the seat body and the base portion. A vehicle seat having a slide rail slidably coupled to the base portion, the vehicle seat being disposed outside the slide rail, and having one end rotatably attached to the seat body side and the other end being a base portion The seat body has a telescopic member that is pivotably attached to the side and expands and contracts by displacing the entire length by driving of a drive mechanism having a drive source, and the seat body is interposed via the slide rail by the expansion and contraction of the telescopic member. And is configured to slide relative to the base.

  According to the first aspect of the invention, the vehicle seat has the expansion / contraction member that expands and contracts by displacing the entire length by the drive of the drive mechanism including the drive source, and the seat body via the slide rail by the expansion and contraction. Is configured to slide relative to the base. The telescopic member is disposed outside the slide rail. Therefore, the slide rail can be configured only to slide, so that the rolling element that is the configuration can be suppressed from becoming smaller, and the sliding resistance of the slide mechanism can be prevented from increasing. Further, the expansion / contraction member is configured to expand and contract by displacing the entire length by driving of a drive mechanism including a drive source, and is configured to slide relative to the base portion via the slide rail by the expansion and contraction. For this reason, the drive gearboxes are not required for the left and right slide rails, respectively, so that the meshing of a plurality of gears can be suppressed, and the noise associated with the meshing of the gears can be suppressed.

  Next, the vehicle seat according to a second aspect of the present invention is the vehicle seat according to the first aspect, wherein the drive mechanism of the telescopic member is adjacent to the motor as the drive source and at least one side in the longitudinal direction with respect to the motor. Any one of the shaft members is screwed so as to overlap with the other in the longitudinal direction, and the telescopic member expands and contracts when the motor and the shaft member are configured to be relatively rotatable.

  According to the second aspect of the invention, since the drive mechanism in the telescopic member has a screwed configuration of the motor and the shaft member, the seat body can be slid without adopting a complicated gear meshing configuration. . In addition, since the motor and the shaft member are screwed, the shaft member can be moved by driving the motor due to the frictional force generated by the engagement between the motor and the shaft member. The side does not rotate. Therefore, the elastic member can hold the sliding position of the sheet main body without separately providing a configuration capable of holding the length other than driving of the driving mechanism.

  Next, a vehicle seat according to a third aspect of the present invention is the vehicle seat according to the second aspect, wherein the motor is configured as a hollow motor, the shaft member is configured as a screw shaft, and the hollow motor is configured as the telescopic member. The screw shaft is provided adjacent to both sides in the longitudinal direction with respect to the hollow motor, and the drive mechanism in the expansion and contraction member includes the hollow motor and the two motors. A screw shaft is screwed in the longitudinal direction, and the expansion / contraction member expands / contracts when the hollow motor and the two screw shafts are configured to be relatively rotatable.

  According to the third aspect of the invention, the hollow motor is provided at an intermediate position in the longitudinal direction of the telescopic member, and the screw shaft is provided adjacent to both sides of the hollow motor in the longitudinal direction. Thereby, when the hollow motor rotates once, the two screw shafts expand and contract in the longitudinal direction. Therefore, the expansion and contraction of the expansion / contraction member becomes efficient, and the power consumption of the hollow motor can be suppressed.

  Next, in a vehicle seat according to a fourth aspect of the present invention, in any one of the first aspect to the second aspect, the elastic member is configured at an intermediate position in the width direction of the seat body.

  According to the fourth aspect, the elastic member is configured at the intermediate position in the width direction of the seat body. As a result, since the driving force of one elastic member is distributed to the left and right slide rails and the seat body is slid, there is no need to configure a plurality of driving mechanisms, and the left and right driving mechanisms are synchronized. Is also unnecessary.

  By taking the measures of the above inventions, the present invention suppresses the sliding resistance of the slide mechanism and the noise associated with the meshing of the gear even when the seat body is slid with respect to the base by the drive mechanism. The vehicle seat can be provided.

It is a perspective view of a vehicular seat concerning this embodiment. It is the II-II sectional view taken on the line of FIG. It is a front view of the vehicular seat concerning this embodiment. It is sectional drawing of the direction along the longitudinal direction about the IV section of FIG. It is sectional drawing which showed the position of the VV line | wire of FIG. 1 as a slide movement of the vehicle seat which concerns on this embodiment. It is an enlarged view of the VI section of FIG. It is an enlarged view of the VII part of FIG.

  Below, embodiment of the vehicle seat of this invention is described using FIGS. In the present embodiment, a seat on the front side of the vehicle seat among the vehicle seats will be described as an example. The directions indicated by appropriate arrows in the drawings are directions that coincide with the front, rear, upper, lower, right, and left sides of the vehicle to which the vehicle seat is applied. In addition, each figure demonstrates centering on the structure of the sliding mechanism of a vehicle seat, in order to demonstrate the structure of embodiment easily, and description may be abbreviate | omitted about another site | part. For example, the seat back and the seat cushion are schematically illustrated, and detailed illustration and description of equipment such as a skeleton, a pad member, and a skin are omitted.

  The vehicle seat is disposed as a front seat of the vehicle as shown in FIGS. The vehicle seat includes a seat body 1, a floor surface F (base), and a slide mechanism 10. The seat body 1 is a seat for a seated person. The floor surface F supports the seat body 1 below the seat body 1. The slide mechanism 10 is a mechanism that makes it possible to adjust the seating position in the vehicle front-rear direction with respect to the floor surface F of the seat body 1 between the seat body 1 and the floor surface F. The slide mechanism 10 includes slide rails 11 and 11 and a shaft 60 (expandable member).

  The seat body 1 is a seat on which a seated person sits in a vehicle as shown in FIGS. The seat body 1 mainly includes a seat back 2 serving as a backrest portion and a seat cushion 3 serving as a seating portion. The seat back 2 has a back frame that forms a skeleton. Although not shown, the back frame is formed in a substantially rectangular frame shape by appropriately bending and drawing pipe members and plate members made of steel. The seat cushion 3 has a cushion frame that forms a skeleton. Although not shown, the cushion frame is formed in a substantially rectangular frame shape by appropriately bending and drawing pipe members and plate members made of steel. The seat body 1 is connected to the cushion frame by a reclining device provided at a lower portion in the width direction of the back frame. Accordingly, the seat back 2 is configured to be able to adjust the backrest angle with respect to the seat cushion 3 or to tilt forward with respect to the seat cushion 3.

  As shown in FIG. 1, the slide rails 11, 11 are arranged in a pair of left and right in the seat width direction of the seat cushion 3 and parallel to the vehicle front-rear direction. Here, since the slide rails 11 and 11 have substantially the same configuration on the left and right, the slide rail 11 on the right side in FIG. 1 will be described as a representative. In the following description of other configurations, substantially the same configuration on the left and right sides may be described with one side as a representative. The slide rail 11 is disposed between the seat body 1 and the floor surface F as shown in FIGS. 1 to 3, and moves the seating position of the seat body 1 relative to the floor surface F in the vehicle front-rear direction. The slide rail 11 mainly includes a lower rail 14, an upper rail 12, and a rolling element 13. The lower rail 14 is formed in a shape extending in the vehicle front-rear direction, and is disposed on the floor surface F. The upper rails 12 are disposed on the seat body 1 side, and are fitted into the lower rails 14 so as to be slidable in the rail longitudinal direction. Specifically, the lower rail 14 and the upper rail 12 are configured to overlap with each other via the rolling elements 13. As a result, the upper rail 12 is adapted to move the seating position of the seat body 1 in the vehicle front-rear direction as it is guided to be slidable in the vehicle front-rear direction relative to the lower rail 14.

As shown in FIGS. 1 and 2, the lower rail 14 is formed in a shape extending in the vehicle front-rear direction and is fixed integrally with the floor surface F. As shown in FIG. 6, the lower rail 14 is formed integrally with the following cross-sectional shape by bending a single flat plate member made of a steel material in some places. Specifically, it has a flat plate-like lower surface portion 141 facing the floor surface F. The lower surface portion 141 is configured with a groove portion 143 capable of rolling a rolling element 13, which will be described later, by bending the lower surface portion 141 into a wave shape, and a plate-shaped side surface portion that rises obliquely upward from one end of the groove portion 143. 142. The side surface portion 142 has a bent portion 146 that bends outward at an intermediate position. The side surface portion 142 has a front end portion 144 that is folded inward from the upper end thereof and engages with a return surface portion 123 of the upper rail 12 described later.
The lower rail 14 is configured to support the seat body 1 and corresponds to the “base” of the present invention together with the floor surface F. In the present embodiment, the lower rail 14 is separately provided on the floor surface F of the vehicle and is shown as a “base”. However, various forms can be implemented as long as the seat body 1 is supported. That is, the lower rail 14 may not be separately configured on the slide rail 11 described above, and the groove portion 143 of the lower rail 14 may be integrally provided on the floor surface F and configured as a “base”. At this time, it is desirable that the upper rail 12 is not separated from the floor surface F.

  The upper rail 12 is disposed on the seat body 1 side as shown in FIGS. The upper rail 12 is fitted to the lower rail 14 so as to be slidable in the longitudinal direction. As shown in FIG. 6, the upper rail 12 is integrally formed in a substantially U-shaped cross section by bending a single flat plate member made of a steel material in some places. Specifically, the upper surface portion 121 has a flat plate shape substantially parallel to the floor surface F. The upper surface portion 121 includes a flat plate-shaped outer side surface portion 122A and an inner side surface portion 122B extending from both ends of the upper surface portion 121. The outer side surface portion 122 </ b> A corresponding to the side surface portion 142 of the lower rail 14 has a return surface portion 123 that is bent outward from the lower end in a curved shape and engages with the front end portion 144 of the lower rail 14. The upper rail 12 is integrally formed with the seat body 1 and corresponds to the “seat body side” of the present invention.

  The rolling element 13 is formed in a substantially disc shape, and is rotatable by pivotally supporting the center and the upper rail 12. The rolling element 13 can be variously applied, such as a synthetic resin, an elastic body such as rubber, or a metal. Two rolling elements 13 are formed on the upper rail 12 at least front and rear. The upper rails 12 and 12 are configured such that the upper surface portions 121 and 121 are inclined so that they are closer to each other than the return surface portions 123 and 123 at the lower end. This can suppress rattling of the upper rails 12 and 12 from top to bottom and from side to side.

  A first connecting rod 15 and a second connecting rod 16 are bridged between the slide rails 11 and 11 as shown in FIGS. The first connecting rod 15 is bridged between the upper rails 12 and 12 near the front ends. As for the 1st connection rod 15, the pipe member which consists of steel materials is formed in linear form, and the brackets 20 and 20 are being fixed to the both ends. The bracket 20 is formed in a substantially U-shaped cross section, and one end 20A is fixed to an end portion of the first connecting rod 15 by appropriate fixing means such as welding. The other end 20B of the bracket 20 is provided with a through hole 22 in the center. Further, holes 124 are provided in the outer side surface portion 122A and the inner side surface portion 122B in the vicinity of the front end of the upper rail 12. Then, the other end 20B of the bracket 20 and the inner side surface 122B of the upper rail 12 are in surface contact, and the rolling element 13 is pivotally supported by the through hole 22 and the hole 124 via the fastening member 30 such as a bolt or a nut. Yes. Holes 125 are also provided in the outer side surface portion 122A and the inner side surface portion 122B in the vicinity of the rear end of the upper rail 12, and the rolling elements 13 are pivotally supported via fastening members 30 such as bolts and nuts. The second connecting rod 16 is bridged between the lower rails 14 and 14 near the rear ends. As for the 2nd connecting rod 16, the pipe member which consists of steel materials is formed in linear form, and the L-shaped brackets 24 and 24 of L-shaped cross section are being fixed to the both ends. The first surface 24A of the L-shaped bracket 24 is fixed to the end of the first connecting rod 15 by appropriate fixing means such as welding. The second surface 24B of the L-shaped bracket 24 is provided with a through hole 26 in the center. In addition, a hole 145 is provided in the lower surface 141 near the rear end of the lower rail 14. Then, the second surface 24B of the L-shaped bracket 24 and the lower surface portion 141 of the lower rail 14 are in surface contact, and are fastened together and fixed to the through hole 26 and the hole portion 145 via a fastening member 30 such as a bolt or a nut. ing.

  As shown in FIGS. 1 and 2, the shaft 60 (extensible member) is rotatably connected to a first connecting rod 15 having one end on the seat body 1 side, and the other end is a second connecting rod on the floor surface F side. It is connected to the pivotable. The first connecting rod 15 is configured integrally with the seat body 1 and corresponds to the “seat body side” of the present invention. The second connecting rod is configured to be integrally fixed with the floor surface F, which is the base, and corresponds to the “base” of the present invention together with the floor surface F and the lower rail 14. In addition, although the shaft 60 was shown about the aspect currently spanned between the 1st connecting rod 15 and the 2nd connecting rod 16, it is not restricted to this. That is, the first connecting rod 15 and the second connecting rod are not necessarily indispensable components, and one end of the shaft 60 is rotatably attached to the seat body 1 side, and the other end of the shaft 60 is rotatably attached to the base side. Any configuration can be used. In detail, one end of the shaft 60 may be attached to the one integrally formed with the seat body 1 so as to be rotatable, and the first connecting rod 15 is bridged over the skeleton of the seat body 1. The thing which may be attached to the sheet | seat main body 1 directly instead of the 1st connecting rod 15 may be sufficient. Further, the other end of the shaft 60 only needs to be rotatably attached to a base that is integrally fixed with the floor surface F that is a base, and the floor surface F as a base instead of the second connecting rod. It may be configured to be directly attached to be rotatable.

  As for the shaft 60, the hollow motor 64 is selected among the motors by electric drive as a drive source, as FIGS. 1-3 shows. The shaft 60 constitutes a drive mechanism 62 in which a first screw shaft 91 (shaft member) and a second screw shaft 92 (shaft member) are directly screwed to both ends of the hollow motor 64 in the longitudinal direction. The shaft 60 expands and contracts by displacing the entire length by driving the drive mechanism 62. In the slide mechanism 10, the upper rails 12, 12 on the lower rails 14, 14 slide and move in the vehicle front-rear direction via the rolling elements 13 as the shaft 60 extends and contracts.

  As shown in FIGS. 1 to 4, the hollow motor 64 is roughly composed of an outer cylinder 70 having a hollow cylindrical shape as a stator (stator), and an inner cylinder 80 having a hollow cylindrical shape as a rotor (rotor). And have. The hollow motor can be applied to either a brush motor or a brushless motor. The hollow motor 64 has an outer cylinder 70 having a hollow cylindrical shape. A plate-like permanent magnet 73 formed in an arc shape along the inner peripheral surface of the outer cylinder is adjacent to the S and N poles alternately on the outer peripheral surface 72 which is the inner peripheral surface of the outer cylinder 70. It is arranged over the entire circumference. Both ends of the outer cylinder 70 are covered with a lid-like member, and a slit 74 through which the first screw shaft 91 and the second screw shaft 92 can slide in the longitudinal direction is formed in a substantially central portion. . An inner cylinder 80 having a hollow cylindrical shape is disposed concentrically with the outer cylinder 70 inside the outer cylinder 70 in the radial direction. An electromagnet 90 made of an armature coil is formed on the outer peripheral surface 87 of the inner cylinder, which is the outer peripheral surface of the inner cylinder 80. A bearing device 98 is disposed between both ends of the inner cylinder outer peripheral surface 87 of the inner cylinder 80 and both ends of the outer cylinder inner peripheral surface 72 of the outer cylinder 70. Thereby, the outer cylinder 70 and the inner cylinder 80 are concentrically disposed so as to be relatively rotatable. The inner cylinder inner peripheral surface 82 that is the inner peripheral surface of the inner cylinder 80 is threaded with a screw that allows the first screw shaft 91 and the second screw shaft 92 to be screwed together. Here, the inner cylinder inner peripheral surface 82 is formed with a right-hand threaded portion 84 whose screw notch direction is rightward toward one end side with the center in the longitudinal direction as a boundary. Further, the inner cylinder inner peripheral surface 82 is formed with a left screw portion 86 in which the notch direction of the screw is opposite to the right screw portion 84 toward the other end side with the center in the longitudinal direction as a boundary. The first screw shaft 91 and the second screw shaft 92 are formed as metal columnar members. A right screw portion 94 is cut out on the outer peripheral surface of one end of the first screw shaft 91 corresponding to the right screw portion 84 of the inner peripheral surface 82 of the inner cylinder 80. The other end of the 1st screw shaft 91 comprises the 1st connection part 91a connected with the 1st connection rod 15 as the sheet | seat main body 1 side so that rotation is possible. On the outer peripheral surface of one end of the second screw shaft 92, a left screw portion 96 is cut out corresponding to the left screw portion 86 of the inner cylinder inner peripheral surface 82 of the inner cylinder 80. The other end of the second screw shaft 92 is configured as a second connecting portion 92a that is rotatably connected to a second connecting rod 16 as a base portion. Thus, the shaft 60 is provided with the hollow motor 64 as an intermediate portion located in the middle in the longitudinal direction, and the first screw shaft 91 and the second screw are provided as two side portions adjacent to the hollow motor 64 on both sides in the longitudinal direction. The shaft 92 is directly screwed to constitute the drive mechanism 62. As shown in FIG. 7, C-type retaining rings 40 that suppress the movement of the first connecting rod 15 in the axial direction are provided at both ends of the first connecting portion 91a. The C-type retaining ring 40 has grooves formed in the outer peripheral surface of the first connecting rod 15 corresponding to both ends of the first connecting portion 91a, and is engaged with the grooves. C-type retaining rings 40 that suppress the movement of the second connecting rod 16 in the axial direction are also provided at both ends of the second connecting portion 92a. The C-type retaining ring 40 has grooves formed in the outer peripheral surface of the second connecting rod 16 corresponding to both ends of the second connecting portion 92a, and is engaged with the grooves (not shown). In addition, the structure which suppresses the movement of the axial direction of the 1st connection part 91a and the 2nd connection part 92a is the structure which provides a processus | protrusion radially outward by crimping a part of the 1st connection rod 15 and the 2nd connection rod 16. Etc. may also apply. Further, the shaft 60 is configured at an intermediate position in the width direction of the seat body 1.

  In the present embodiment, a configuration is adopted in which the first screw shaft 91 and the second screw shaft 92 as the two side portions overlap with each other in the longitudinal direction with respect to the hollow motor 64 as the intermediate portion. Although it is not restricted to this, What is necessary is just the structure which expands-contracts when either one of two side parts or an intermediate | middle part overlaps with the other in a longitudinal direction. Therefore, the structure which expands-contracts may be sufficient as an intermediate part overlaps with a longitudinal direction with respect to a side part. In this case, the electric drive source in the intermediate part may not be the hollow motor 64. The hollow motor 64 may have a configuration in which the stator and the rotor are reversed. That is, the outer cylinder 70 may be a rotor and the stator may be an inner cylinder 80. Further, the drive mechanism 62 may have a configuration in which the notch directions of the right screw and the left screw are reversed as long as the shaft member is separated and close in the longitudinal direction with respect to the central drive source. For example, in the above configuration, the inner cylinder 80, the first screw shaft 91, and the second screw shaft 92 have a left-handed configuration on the first screw shaft 91 side and a right-handed configuration on the second screw shaft 92 side. May be. Moreover, the structure which a screw shaft as an axial member adjoins at least one side of the longitudinal direction with respect to the motor as a drive source may be screwed together (structure which expands and contracts only one side of the longitudinal direction of a drive source). In other words, in the present embodiment, the shaft 60 is configured such that the first screw shaft 91 (shaft member) and the second screw shaft 92 (shaft member) are screwed to both ends in the longitudinal direction of the hollow motor 64 to form the drive mechanism 62. In addition, the configuration is shown in which the first screw shaft 91 and the second screw shaft 92 expand and contract when the hollow motor 64 is driven to approach or separate from each other in the longitudinal direction of the hollow motor 64. However, the present invention is not limited to this, and the shaft may be configured such that one of the first screw shaft 91 and the second screw shaft 92 is screwed from the longitudinal direction of the hollow motor 64 so that the drive mechanism 62 is configured to expand and contract. . At this time, the other side to which the screw shaft is not screwed is attached to the seat body side or the base side so as to be rotatable in a configuration that does not expand and contract. Moreover, the outer cylinder 70 suppresses rotation by making the shape of the slit 74 non-circular and making the cross-sectional shapes of the first screw shaft 91 and the second screw shaft 92 corresponding to this non-circular shape. In addition, the structure which suppresses rotation of the outer cylinder 70 is not restricted to this. For example, when the slit 74, the first screw shaft 91, and the second screw shaft 92 are circular, the outer cylinder 70 is rotated by fixing a connecting member across the seat body 1 side, the floor surface F side, and the like. Can also be suppressed.

  The operation of the slide mechanism 10 in the vehicle seat will be described. As shown in FIGS. 1 and 5, the hollow motor 64 in the drive mechanism 62 of the shaft 60 is driven by receiving power supply. The hollow motor 64 is driven by rotating the inner cylinder 80 around the axis with respect to the outer cylinder 70. Then, the first screw shaft 91 and the second screw shaft 92 at both ends are brought close to or separated from each other in the longitudinal direction along with the screwing with the inner cylinder 80. Thereby, the shaft 60 expands and contracts by displacing the entire length. When the shaft 60 expands and contracts, the rolling element 13 of the upper rail 12 rolls on the lower rail 14 (in other words, the floor surface F of the vehicle) and slides.

  Thus, according to the vehicle seat of the embodiment, it has the shaft 60 (expandable member) that expands and contracts by displacing the entire length by driving the drive mechanism 62 including the hollow motor 64 (drive source). By this expansion and contraction, the seat body 1 is configured to slide with respect to the floor surface F (base) via the slide rails 11 and 11. The shaft 60 is disposed outside the slide rails 11 and 11. Therefore, since the slide rails 11 and 11 can only be configured to slide, it is possible to suppress the rolling element 13 that is the configuration from being reduced and to prevent the sliding resistance of the slide mechanism 10 from increasing. . Further, the shaft 60 is configured to expand and contract by moving the entire length by driving a drive mechanism 62 including a hollow motor 64, and is configured to slide with respect to the floor surface F via the slide rails 11 and 11 by this expansion and contraction. is there. Therefore, since the left and right slide rails 11 and 11 do not require a driving gear box, the meshing of a plurality of gears and the like can be suppressed, and the noise accompanying the meshing of the gears can be suppressed.

  Further, since the drive mechanism 62 in the shaft 60 is a screwed configuration of the hollow motor 64 and the first screw shaft 91 and the second screw shaft 92 as shaft members, without adopting a complicated gear meshing configuration, The sheet body 1 can be slid. Further, since the hollow motor 64 and the first screw shaft 91 and the second screw shaft 92 are screwed, the first screw shaft 91 and the second screw are driven by the driving of the hollow motor 64 due to the frictional force caused by the meshing between them. Although the shaft 92 can move, the hollow motor 64 does not rotate even if the first screw shaft 91 and the second screw shaft 92 are moved in the longitudinal direction. Therefore, the shaft 60 can hold the sliding position of the sheet body 1 without separately providing a configuration capable of holding the length other than driving the drive mechanism 62.

  Further, the hollow motor 64 is provided at an intermediate position in the longitudinal direction of the shaft 60, and the first screw shaft 91 and the second screw shaft 92 are provided adjacent to both sides of the hollow motor 64 in the longitudinal direction. is there. Thereby, when the hollow motor 64 makes one rotation, the two first screw shafts 91 and the second screw shaft 92 expand and contract in the longitudinal direction. Therefore, the expansion and contraction of the shaft 60 is efficient, and the power consumption of the hollow motor 64 can be suppressed.

  The shaft 60 is configured at an intermediate position in the width direction of the seat body 1. As a result, the driving force of one shaft 60 is distributed to the left and right slide rails 11 and 11 so that the seat body 1 slides. A configuration for synchronizing the mechanism 62 is also unnecessary.

  As mentioned above, although embodiment of this invention was described, the vehicle seat of this invention is not limited to embodiment, It can implement with other various forms. In the present embodiment, the vehicle seat has been described as an example, but the present invention can be applied to seats in various vehicles. Further, the drive source configured in the drive mechanism of the telescopic member is not limited to a hollow motor, and may be a configuration in which a solid shaft rotates around a shaft and a screw shaft as a shaft member is screwed together. Good. Moreover, it is not restricted to the structure which has a screw shaft in the both ends of a motor. The screw shaft as the shaft member may be configured to expand and contract adjacent to at least one side in the longitudinal direction with respect to the motor. Of the slide rails, the upper rail is included on the seat body side, and the lower rail is included on the floor surface F side as the base. A structure in which the lower rail is not formed and the groove shape of the lower rail is directly formed in the surface shape of the floor surface F may be included. At this time, it is desirable that the upper rail is not separated from the floor surface.

DESCRIPTION OF SYMBOLS 1 Seat main body 2 Seat back 3 Seat cushion 10 Slide mechanism 11, 11 Slide rail 12 Upper rail 121 Upper surface part 122A Outer side surface part 122B Inner side surface part 123 Return surface part 124 Hole part 125 Hole part 14 Lower rail (base part)
141 Lower surface portion 142 Side surface portion 143 Groove portion 144 Tip portion 145 Hole portion 146 Bending portion 13 Rolling element 15 First connecting rod (sheet body)
20 Bracket 20A Bracket one end 20B Bracket other end 22 Through hole 16 Second connecting rod (base)
24 L-shaped bracket 24A First surface 24B of L-shaped bracket Second surface 26 of L-shaped bracket 26 Through hole 30 Fastening member 40 C-type retaining ring 60 Shaft (expandable member)
62 Drive mechanism 64 Hollow motor (drive source)
70 outer cylinder 72 outer cylinder inner peripheral surface 73 permanent magnet 74 slit 80 inner cylinder 82 inner cylinder inner peripheral surface 84 right screw portion 86 left screw portion 87 inner cylinder outer peripheral surface 90 electromagnet 91 first screw shaft (shaft member)
91a 1st connection part 94 Right screw part 92 2nd screw shaft (shaft member)
92a Second connection part 96 Left-hand thread part 98 Bearing device F Floor surface (base part)

Claims (4)

A seat body on which a seated person sits;
A base for supporting the seat body below the seat body;
A vehicle seat having a slide rail disposed between the seat body and the base and slidably connecting the seat body to the base,
Disposed outside the slide rail, one end is pivotally attached to the seat body side and the other end is pivotally attached to the base side, and the entire length is displaced by driving of a drive mechanism having a drive source. And has an elastic member that expands and contracts,
The vehicle seat according to claim 1, wherein the seat body is configured to slide relative to the base portion via the slide rail by extension and contraction of the extension member. The vehicle seat according to claim 1,
The drive mechanism in the telescopic member is screwed so that one of the motor as the drive source and the shaft member adjacent to the motor on at least one side in the longitudinal direction overlaps the other in the longitudinal direction. Are combined,
The telescopic member is a vehicle seat that expands and contracts when the motor and the shaft member are configured to be relatively rotatable. The vehicle seat according to claim 2,
The motor is configured as a hollow motor,
The shaft member is configured as a screw shaft,
The hollow motor is provided at an intermediate position in the longitudinal direction of the telescopic member,
The screw shaft is provided adjacent to both sides in the longitudinal direction with respect to the hollow motor,
The drive mechanism of the telescopic member is such that the hollow motor and the two screw shafts are screwed in the longitudinal direction,
The telescopic member is a vehicle seat that expands and contracts when the hollow motor and the two screw shafts are configured to be relatively rotatable. The vehicle seat according to any one of claims 1 to 3,
The telescopic member is a vehicle seat configured at an intermediate position in the width direction of the seat body.

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