JP2008049848A - Automotive seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automotive seat device with a simple and compact structure, capable of effectively adjusting the mounting state of a seat cushion in response to an action for adjusting the forward/backward position of an occupant's seat to suit the occupant's build. <P>SOLUTION: This automotive seat device includes: seat slide rails 1 including a pair of right and left lower rails 10, which are fixed on the floor part in a cabin and extend in the longitudinal direction of a vehicle body, and a pair of right and left upper rails 11 slidably supported forward/backward along the lower rails 10; and cushion frames 2 supported so as to move forward/backward with the upper rails. Forward/backward movement driving parts for driving to elevate or lower the rear portions of the cushion frames 2 in response to the forward/backward movement of the cushion frames 2 are arranged on the inner lateral portion sides of the seat slide rails 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle seat apparatus having a cushion frame supported so as to be movable in the front-rear direction of a vehicle body along a pair of left and right seat slide rails installed on a floor portion of the vehicle body.

  Conventionally, as disclosed in Patent Document 1 below, a lower profile member (lower rail) fixed to a floor panel in a vehicle interior and an upper profile member (upper rail) supported slidably along the lower profile member. ), The occupant seat is supported by a pair of left and right linear feed bases (sliding rails) so as to be movable back and forth. The linear feed base is configured on a liner fixed to a lower profile member. The liner has a vertical airfoil surface, and the seat cushion base is mounted on a rear spindle carried by a lug fixed to the upper profile member, and the front lower portion of the seat cushion is the upper profile member of the feed base. Mounted on a spindle that cooperates with a lever arm pivoted by a spindle fixed at the top of each Each of the free ends of the lever arm carries a pin or roller that moves along an arcuate window formed along the vertical airfoil surface, and the seat cushion of the passenger seat extends in the longitudinal direction of the vehicle body along the linear feed base. When the slide is displaced, the tilt angle of the seat cushion is automatically changed.

That is, in the automobile seat moving device disclosed in Patent Document 1, the lug that is disposed below the front portion of the seat cushion 71 and carried on the front end portion of the linear feed base 72 as shown in FIG. 73 has a lever arm 74 pivotally supported at the center, and the lever arm 74 is pivotally supported by a lug 75 fixed to the lower surface of the front end of the seat cushion 71 and a rear end. However, it is slidably locked along an arcuate window 78 formed in the vertical wing 77 of the lower profile member (lower rail) 76, that is, a guide groove curved so that the central portion is recessed downward. Then, as the seat cushion 71 advances from the rear position S3 indicated by the phantom line to the intermediate position S2 indicated by the solid line along the lower profile member 76 installed on the vehicle body in the upwardly rising inclination state, the arc-shaped window 78 is provided. When the lever arm 74 is guided by the lever arm 74 to be lowered and the lever arm 74 is raised, the front portion of the seat cushion 71 is pushed up by the lever arm 74 and the seat surface is moved forward. As the seat cushion 71 moves forward from the intermediate position to the front position indicated by the thin line S1, the lever arm 74 is in a lying state, and the front portion of the seat cushion 71 is lowered to seat. The inclination angle is reduced so that the same inclination angle as that of the rear position S3 is obtained.
JP 62-116324 A

  As disclosed in the above-mentioned Patent Document 1, a tilt means having an arc-shaped window 78 formed in the vertical wing 77 and a lever arm 74 whose rear end is slidably locked to the arc-shaped window 78 is seated. It is arranged at the front part of the cushion 71, and as the seat cushion 71 moves back and forth, the front end part of the seat cushion 71 is oscillated and displaced with the rear spindle 79 arranged below the rear end part as a fulcrum. When configured, the inclination angle of the seating surface is changed, and so-called hip points H1 to H3 that are seating centers of the occupants with respect to the seating surface are moved up and down along an arcuate line Ma curved upward. Thus, according to the seat height of the passengers J1 to J3 seated on the seat cushion 71, the viewpoints I1 to I3 are brought close to the appropriate line L and the forward view is It is possible to guarantee.

  However, a vertical wing 77 standing so as to cover a side surface portion of the lower profile member (lower rail) 76, and a lever arm 74 having a rear end portion slidably engaged with an arc-shaped window 78 of the vertical wing 77. Thus, when the tilting means for moving up and down the front portion of the seat cushion 71 in accordance with the back-and-forth movement of the seat cushion 71 is configured, the vertical wing 77 is disposed on the side surface portion of the passenger seat. When exposed in the passenger compartment, the appearance deteriorates, and in order to prevent this, it is necessary to provide a cover member that covers the vertical wing 77, and there is a disadvantage that the structure is inevitable.

  In view of the above circumstances, the present invention is for an automobile capable of effectively adjusting the installation state of a seat cushion according to an operation for adjusting the front and rear positions of an occupant seat according to the physique of the occupant with a simple and compact configuration. An object is to provide a sheet apparatus.

  The invention according to claim 1 is a seat comprising a pair of left and right lower rails fixed on a floor portion of a passenger compartment and extending in the front-rear direction of the vehicle body, and a pair of left and right upper rails slidably supported along the lower rail. An automotive seat device having a slide rail and a cushion frame supported so as to move back and forth together with the upper rail, and a lift drive unit that drives the rear part of the cushion frame up and down according to the back and forth movement of the cushion frame, It is arranged on the inner side of the seat slide rail.

  According to a second aspect of the present invention, in the automobile seat device according to the first aspect, the rear link member provided at the rear portion of the cushion frame and the support member provided on the vehicle body side and supporting the rear link member. The rear link member is provided with a pivot portion pivotally supported by the upper rail, a coupling portion coupled to the rear portion of the cushion frame, and an engagement portion engaged with the support member on the vehicle body side. The elevating drive part is provided on the support member, and the elevating drive part slidably supports the engaging part of the rear link member, and the rear link member is swung around the pivotal support part as the cushion frame moves back and forth. By moving and moving, the connecting portion of the rear link member is moved up and down to drive the rear portion of the cushion frame up and down.

  According to a third aspect of the present invention, in the vehicle seat device according to the second aspect, the rear link member is formed in a substantially triangular shape in a side view, and the pivot portion is connected to each vertex of the rear link member. A portion and an engaging portion are provided.

  According to a fourth aspect of the present invention, in the automobile seat device according to the first aspect, a rod-like drive link member having a central portion pivotally supported by the upper rail and pivotally supported at one end portion with a cushion frame. And a support member fixed to the lower rail and supporting the base end portion of the drive link member, and ascending / descending drive comprising an extension portion extending downward from the lower rail from the front-rear central portion of the lower rail in a side view The support link member is provided on the support member, and the other end portion of the drive link member is slidably supported by the lift drive unit, and the drive link member is oscillated and displaced with the shaft support portion as a fulcrum according to the back and forth movement of the cushion frame By doing so, the rear part of the cushion frame is driven to move up and down.

  According to a fifth aspect of the present invention, in the automobile seat device according to the fourth aspect of the present invention, the connecting portion that connects the rear end portion of the drive link member to the rear portion of the cushion frame, and the front end portion of the drive link member is the support member. An engaging portion that engages with the extending portion is provided, a guide groove that is lowered forward is formed in the extending portion of the support member, and the engaging portion of the drive link member is slid along the guide groove. Thus, the connecting portion of the drive link member is moved up and down.

  According to the first aspect of the present invention, the hip point is the seating center of the occupant seated on the seat cushion by moving the upper rail and the cushion frame back and forth along the lower rail to raise and lower the rear portion of the seat cushion. Can be effectively moved up and down, and it is possible to effectively improve the appearance with a simple configuration without providing a special cover for covering the lifting drive unit, and to form a dead formed in the lower part of the seat cushion. There exists an advantage that the said raising / lowering drive part can be arrange | positioned compactly using space.

  In the invention according to the second aspect, when the upper rail and the cushion frame are moved back and forth along the lower rail, the rear link member is rocked and displaced by the lift drive portion of the support member, and the rear portion of the seat cushion is driven to move up and down. As a result, the hip point, which is the seating center of the occupant seated on the seat cushion, can be effectively moved up and down, and the movement locus of the hip point can be determined based on the installation state of the elevating drive unit and the rear link member. There is an advantage that it can be changed variously according to the swing displacement state.

  In the invention according to claim 3, when the rear link member is formed in a substantially triangular shape in a side view, and the pivotal support portion, the coupling portion, and the engagement portion are disposed at each vertex portion of the rear link member, The rear portion of the cushion frame can be effectively lifted and lowered with a compact configuration while preventing each portion of the rear link member from interfering with the peripheral members, and the rear link member is in the rear lower position. Even in this case, there is an advantage that the lower end portion of the rear link member can be prevented from interfering with the floor surface without taking measures such as positioning the floor panel downward.

  According to the fourth aspect of the present invention, the elevator drive unit including the extending portion of the support member, the drive link member driven by the elevator drive unit, and the cushion frame are compactly arranged at a superimposed position in a side view. It can be arranged.

  According to the fifth aspect of the present invention, the guide member is formed by effectively using the space portion formed in the lower portion of the seat slide rail and disposing the support member having a sufficient size in the space portion. The installation range of the groove and the total length of the drive link member can be set large, and the amount of vertical movement of the seat cushion can be secured sufficiently and the occupant's physique can be accommodated without setting the seat cushion forward / backward movement distance that much. There is an advantage that the installed state can be effectively secured.

  1 to 3 show an embodiment of an automobile seat device according to the present invention. The vehicle seat device includes a pair of left and right seat slide rails 1 installed on a floor of a passenger compartment so as to extend in the front-rear direction of the vehicle body, and a pair of left and right cushions supported by the seat slide rail 1 so as to be movable back and forth. It comprises a frame 2, a pair of left and right cushion support members 3 respectively disposed on the top of each cushion frame 2, and a cushion pan 4 supported by the cushion support member 3. The cushion pan 4 covers the lower part. A passenger seat such as a driver's seat by a seat cushion 5 held so as to be seated, a seat back 6 erected upward from the rear portion of the cushion frame 2, and a headrest (not shown) located at the upper end portion thereof. Is configured.

  The seat slide rail 1 is composed of a C-shaped member having a cross-section with an open upper surface, and is fixed on the floor portion of the vehicle body by a pair of front and rear support legs 8 and 9 having different heights in an upwardly inclined state. A lower rail 10 and an upper rail 11 supported so as to be slidable along the lower rail 10, and the front portion of the cushion frame 2 is connected to the upper rail 11 via a connecting link member 12 of a single joint. ing. A seat drive mechanism 13 that drives the upper rail 11 and the cushion frame 2 to slide in the longitudinal direction of the vehicle body along the lower rail 10 is provided at the front end of the lower rail 10, and the rear portion of the lower rail 10 is provided. Is provided with an elevating drive mechanism 14 that elevates and lowers the rear portion of the cushion frame 2 in accordance with the back-and-forth movement of the upper rail 11.

  As shown in FIG. 4, the connecting link member 12 is pivotally supported at the lower end by the support bracket 15 disposed on the front inner surface side of the upper rail 11. A front coupling member 16 made of a rod-like body or the like installed so as to couple the front parts is pivotally supported. Then, as the cushion frame 2 moves back and forth along the lower rail 10, when the rear part of the cushion frame 2 and the rear part of the seat cushion 5 are driven up and down by the up-and-down drive mechanism 14 as described later, The link member 12 swings and displaces with the lower end pivot portion as a fulcrum, and the cushion frame 2 swings and displaces with the front coupling member 16 pivotally supported at the upper end portion as a fulcrum.

  As shown in FIG. 5, the seat drive mechanism 13 connects the screw shaft 18 whose front and rear ends are rotatably supported by bearing members attached to the upper rail 11 and the front ends of the left and right upper rails 11. The connecting frame 19 installed on the connecting frame 19, a drive motor 20 held on the connecting frame 19 via a bracket, and installed so as to extend in the vehicle width direction between the left and right upper rails 11 and driven to rotate by the driving motor 20 Drive shaft 21 to be operated. Bevel gears 22 for transmitting the rotational driving force of the drive shaft 21 to the screw shaft 18 are provided at both left and right end portions of the drive shaft 21 and the front end portion of the screw shaft 18, and are fixed to the upper end portion of the lower rail 10. The screw shaft 18 is screwed into the screw portion of the slide block 17. The drive shaft 21 is rotationally driven in accordance with forward / reverse rotation of the drive motor 20, and the rotational force is transmitted to the screw shaft 18 via the bevel gear 22 to be rotationally driven. The screw shaft 18 screwed into the threaded portion 17 is moved forward or backward, and the upper rail 11 and the cushion frame 2 are moved back and forth along the lower rail 10 correspondingly.

  Further, as shown in FIGS. 3 and 6, the elevating drive mechanism 14 that elevates and lowers the rear portion of the cushion frame 2 includes a rear link member 23 provided at the rear portion of the cushion frame 2, and a rear inner portion of the lower rail 10. And a support member 24 that is disposed on the side and supports the rear link member 23. The rear link member 23 is made of a plate material that is formed in a substantially triangular shape when viewed from the side, and has a pivotal support portion to the upper rail 11, a connection portion to the cushion frame 2, and the support member 24. And an engaging portion. That is, a pivot portion 26 that is pivotally supported on the rear inner surface of the upper rail 11 via a pivot shaft 25 is provided at the front portion of the rear link member 23, and the left and right cushion frames 2 are disposed above the rear portion of the rear link member 23. A connecting portion 28 connected to a rod-like rear connecting member 27 installed so as to connect the rear portions to each other is provided, and an engaging pin is provided at a lower portion of the rear link member 23 with the support member 24 on the vehicle body side. An engaging portion 30 is provided to be engaged via 29.

  The support member 24 includes a rear support leg 9 that supports the rear portion of the lower rail 10 and a fixed plate 31 that is fixed to the floor portion of the passenger compartment, and the seat slide rail 1 from the inner end of the fixed plate 31. An upright plate 32 that rises upward is provided on the inner side portion side, specifically, below the central side portion in the width direction of the cushion frame 2. A guide groove 33 is formed in the elevating drive unit composed of the upright plate 32 so as to incline forward at a steeper angle than the seat slide rail 1, and the engagement pin 29 is slidably engaged with the guide groove 33. As a result, when the cushion frame 2 moves back and forth, the engagement portion 30 of the rear link member 23 is slidably supported by the support member 24, and the rear link member 23 swings around the pivot portion 26 as a fulcrum. The rear portion of the cushion frame 2 is moved up and down by being displaced.

  That is, the pivot portion 26 provided at the front portion of the rear link member 23 is pivotally supported at the rear portion of the upper rail 11, and the engagement portion 30 provided below the rear portion of the rear link member 23 is engaged with the engagement portion. Since the pin 29 is engaged with the guide groove 33 inclined at a steep angle, the upper rail 11 and the cushion frame 2 are positioned on the rearmost side of the seat slide rail 1 as shown in FIGS. Thus, in a state where the engagement pin 29 provided below the rear portion of the rear link member 23 is positioned at the rearmost end portion of the guide groove 33, the engagement portion 30 is maximally downward from the seat slide rail 1. It is supported by the support member 24 in a separated state.

  When the upper rail 11 and the cushion frame 2 are driven by the seat drive mechanism 13 and are slid and displaced from the rearmost side to the front side of the vehicle body, the pivotal support portion 26 of the rear link member 23 moves forward in parallel with the seat slide rail 1. Move to. On the other hand, the engagement pin 29 provided below the rear portion of the rear link member 23 is slid along the guide groove 33 so that the engagement is located at a position far away from the seat slide rail 1. The portion 30 is displaced in the direction approaching the seat slide rail 1, and the rear link member 23 is oscillated and displaced as indicated by an arrow in accordance with the pivot portion 26 accordingly, so that the rear portion is located above the rear portion. The connecting portion 28 of the provided cushion frame 2 is displaced upward as shown in FIG. 7, and the rear portion of the cushion frame 2 is pushed up together with the rear coupling member 27. Thus, in a state where the cushion frame 2 is slid to the front side of the vehicle body and the rear link member 23 is moved to the rising drive position of the cushion frame 2, the connecting portion 28 to the cushion frame 2 is substantially triangular in a side view. The positional relationship of the pivotal support portion 26, the connecting portion 28, and the engaging portion 30 is set so as to be positioned at the apex portion of the rear link member 23 formed in a shape.

  As shown in FIGS. 6 and 8, the cushion support member 3 includes a horizontal plate 34 fixed to the lower surfaces of the left and right side portions of the cushion pan 4 by means such as bolts, and an inner side portion of the horizontal plate 34. A hanging plate 35 extending downward along the inner surface of the cushion frame 2 is provided. The rear end portion of the hanging plate 35 is pivotally supported by a pivot shaft 36 protruding from the inner wall surface of the cushion frame 2, so that the cushion support member 3 is supported with the pivot portion (the pivot shaft 36) as a fulcrum. Is supported in a swingable manner. Further, one (right side) of the cushion support members 3 disposed on the left and right sides of the seat cushion 5 is driven by an angle adjusting mechanism 37 provided on the cushion frame 2 to swing and displace with the pivot shaft 36 as a fulcrum. The swing displacement is transmitted to the other cushion support member 3 through the power transmission mechanism 38.

  The angle adjusting mechanism 37 includes a rotary shaft 39 that is rotatably supported by the cushion frame 2, an operation handle 40 that rotates the rotary shaft 39, and a drive gear 42 that is fixed to the tip of the rotary shaft 39. The drive gear 42 is installed so as to mesh with a sector gear portion 41 formed at an intermediate portion in the front-rear direction of the cushion support member 3. The rotary shaft 39 allows the rotational force of the operation handle 40 to be transmitted to the drive gear 42 via the rotary shaft 39 and the weight of the seat cushion 5 input from the sector gear portion 41 to the drive gear 42. For example, a conventionally known drum brake that restricts the rocking displacement of the cushion support member 3 by preventing the rotational force according to the transmission from being transmitted to the base end side (operation handle 40 side) of the rotation shaft 39. A reverse rotation prevention mechanism 43 is provided. Further, the cushion support member 3 is formed with a support groove 45 on the rear side portion of the sector gear portion 41 to be engaged with a guide pin 44 protruding from the cushion frame 2. When the guide pin 44 is slid and displaced, rattling of the cushion support member 3 when the cushion support member 3 is displaced is prevented.

  The power transmission mechanism 38 includes a pair of left and right front link members 49 whose base ends are pivotally supported by the cushion frame 2 via support bars 46 installed between the front portions of the left and right cushion frames 2. A connecting pin 47 protruding from the cushion support member 3 is engaged with a long hole 48 formed in the distal end portion of the link member 49, so that the distal end portion of the front link member 49 is attached to the cushion support member 3. It is connected. Then, the driving force transmitted from the angle adjusting mechanism 37 to the one cushion support member 3 and the front link member 49 is connected to the other front link member 49 and the cushion support member 3 via the connecting member formed of the support bar 46. The left and right cushion support members 3 are configured to swing and displace at the same time.

  That is, when the occupant rotates the operation handle 40 of the angle adjusting mechanism 37, the turning power is transmitted to the drive gear 42 via the rotation shaft 39, and the drive gear 42 is driven to rotate. When the sector gear portion 41 is driven, one of the cushion support members 3 swings and displaces with the pivot shaft 36 at the rear end as a fulcrum. When one cushion support member 3 swings and displaces in this way, the front link member 49 connected to the front end of the cushion support member 3 swings and displaces with the support bar 46 at the lower end as a fulcrum. It is transmitted to the other front link member 49 side through the bar 46, and the front link member 49 is oscillated and displaced, and the front end portion of the other cushion support member 3 is driven through the front link member 49. Thus, the cushion support member 3 is configured to swing and displace from the lowered position shown in FIGS. 6 and 7 to the raised position shown in FIG. 9 with the pivot shaft 36 at the rear end as a fulcrum.

  When a short occupant is seated on the occupant seat configured as described above, when the operation motor (not shown) is operated to rotate the drive motor 20 of the seat drive mechanism 13 in the normal direction, the seat slide rail 1 When the upper rail 11 is driven to the front side of the vehicle body, the cushion frame 2 moves upward along the lower rail 10 of the seat slide rail 1 installed in the forwardly rising inclination state, and as shown in FIG. In addition, the rear portion of the cushion frame 2 is pushed up by the elevating drive mechanism 14 including the rear link member 23 pivotally supported on the rear portion of the cushion frame 2 and the support member 24 on the vehicle body side. When the rear part is pushed up in accordance with the forward movement of the cushion frame 2 and the seat cushion 5, the seat cushion 5 swings and displaces with the front coupling member 16 provided at the upper end of the connecting link member 12 as a fulcrum. By doing so, the installation angle changes to a state close to horizontal.

  On the other hand, when the drive motor 20 of the seat drive mechanism 13 is reversed when a tall occupant sits on the seat cushion 5, the upper rail 11 of the seat slide rail 1 is driven to the rear side of the vehicle body. As a result, the cushion frame 2 descends while retracting along the lower rail 10, and the rear part of the cushion frame 2 is pulled down by the elevating drive mechanism 14 including the rear link member 23 and the support member 24 as shown in FIG. It will be. When the rear portion of the cushion frame 2 and the seat cushion 5 is pulled down in accordance with the rearward movement, the cushion frame 2 is oscillated and displaced so that the seat cushion 5 is inclined forward.

  Further, the cushion frame 2 and the seat cushion 5 are slid and displaced, and the front and rear positions thereof are adjusted. Then, the occupant rotates the operation handle 40 of the angle adjusting mechanism 37 as necessary, thereby supporting the cushion support. While driving one of the members 3, the driving force is transmitted to the other cushion support member 3 via the power transmission mechanism 38, and the left and right cushion support members 3 are supported by the pivot shaft 36 at the rear end. At the same time, the installation angle (inclination angle) of the seat cushion 5 supported via the cushion support member 3 and the cushion pan 4 can be arbitrarily adjusted.

  As described above, the seat slide rail 1 includes the pair of left and right lower rails 10 fixed on the floor portion of the passenger compartment and extending in the longitudinal direction of the vehicle body, and the pair of left and right upper rails 11 slidably supported along the lower rails 10. And a cushion frame 2 supported so as to move back and forth together with the upper rail 11, and in a vehicle seat device in which the lower part of the seat back 6 is supported at the rear of the cushion frame 2, The raising / lowering drive part of the raising / lowering drive mechanism 14 which raises / lowers the rear part of the cushion frame 2 according to the movement, that is, the upright plate 32 of the support member 24 in which the guide groove 33 is formed is connected to the inner side of the seat slide rail 1. Therefore, the front and rear positions of the seat cushion 5 constituting the passenger seat The seat frame 5 can be effectively adjusted in height so that the occupant's field of view and the like can be appropriately secured by swinging and displacing the cushion frame 2 in accordance with the adjustment operation corresponding to There is an advantage that the elevating drive unit composed of the upright plate 32 can be effectively concealed by the seat slide rail 1. Therefore, without providing a special cover that covers the installation portion of the upright plate 32, the appearance is effectively improved with a simple configuration, and the dead space formed in the lower portion of the seat cushion 5 is used to improve the appearance. The raising / lowering drive mechanism 14 can be arrange | positioned compactly.

  Moreover, in the said embodiment, the raising / lowering drive mechanism 14 which has the back link member 23 provided in the rear part of the cushion frame 2, and the support member 24 provided in the vehicle body side and supporting the back link member 23 is provided, and the said back The link member 23 is provided with a pivot portion 26 pivotally supported by the upper rail 11, a connecting portion 28 coupled to the rear portion of the cushion frame 2, and an engaging portion 30 engaged with the support member 24 on the vehicle body side. The rear link member 23 is swung about the pivot 26 as a fulcrum according to the back and forth movement of the cushion frame 2 while the engagement portion 30 of the rear link member 23 is slidably supported on the upright plate 32 of the support member 24. By dynamically displacing, a guide groove 33 is formed to move the connecting portion 28 of the rear link member 23 up and down to drive the rear portion of the cushion frame 2 up and down. Since the raising / lowering drive part which consists of the said standing board 32 was provided, a passenger | crew's visual field etc. can be ensured appropriately according to the operation | movement which adjusts the front-back position of the seat cushion 5 which comprises a passenger | crew's seat according to a passenger | crew's physique etc. Thus, there is an advantage that the installation height of the seat cushion 5 can be adjusted effectively.

  That is, when a short occupant A sits on the seat cushion 5, the seat drive mechanism 13 slides the upper rail 11 and the cushion frame 2 toward the front side of the vehicle body as shown in FIG. The seat cushion 5 moves upward while moving along the lower rail 10 of the seat slide rail 1, and the engaging pin 29 provided in the engaging portion 30 of the rear link member 23 is formed of the upright plate 32. By sliding and displacing along the guide groove 33 formed in the elevating drive unit, the rear part of the rear link member 23 rises at a steep angle, and the rear part of the seat cushion 5 connected thereto is greatly pushed up. Therefore, the hip point H which is the seating center of the occupant located at the rear part of the seat cushion 5 is In correspondence to the length it can be effectively moved to the front upward.

  Then, as the engaging portion 30 of the rear link member 23 slides and displaces along the guide groove 33, the rear link member 23 is oscillated and displaced with the pivot portion 26 as a fulcrum, whereby the rear portion of the seat cushion. Therefore, the movement locus of the hip point H can be variously changed without being limited only to the inclination angle of the guide groove 33. For example, as shown in the above embodiment, the pivotal support portion 26 to the upper rail 11 is provided at the front portion of the rear link member 23, the connection portion 28 to the cushion frame 2 is provided above the rear portion of the rear link member 23, and the rear portion When the engaging portion 30 to the upright plate 32 is provided below the rear portion of the link member 23, the rear link member 23 swings in a direction in which the rear portion is pushed upward in accordance with the forward movement of the seat cushion 5. Therefore, the hip point H, which is the seating center of the occupant, can be moved more effectively upward in accordance with the swinging displacement of the rear link member 23.

  Accordingly, the hip point of the occupant seated on the seat cushion 5 can be significantly changed according to the back-and-forth movement of the seat cushion 5 without taking measures such as extremely increasing the lever ratio of the rear link member 23. It is possible to effectively move the line of sight of the occupant above the line of sight so that the line of sight is likely to be located below the appropriate line because of the low height without causing rattling in the seat cushion 5. Can match the line. In addition, as the cushion frame 2 and the seat cushion 5 move forward, the rear part is pushed up via the lifting drive mechanism 14, thereby supporting the front coupling member 16 provided at the upper end of the connecting link member 12. The cushion frame 2 swings and displaces so that the seat cushion 5 is installed at a substantially horizontal angle. Therefore, the foot of a short occupant who tends to shorten the length of the foot according to the height of the seat There is an advantage that a seating posture can be obtained in which the occupant bends the knee largely and hangs the lower part of the knee down at a predetermined angle so as not to be separated from the vehicle.

  On the other hand, when a tall occupant sits on the seat cushion 5, the seat drive mechanism 13 slides the upper rail 11 and the cushion frame 2 to the rear side of the vehicle body, as shown in FIG. While lowering the seat cushion 5 along the lower rail 10 and sliding the engagement pin 29 along the guide groove 33 of the upright plate 32, the rear portion of the rear link member 23 is lowered at a steep angle. The rear portion of the seat cushion 5 can be greatly lowered. As described above, as the engaging portion 30 of the rear link member 23 slides and displaces along the guide groove 33, the rear link member 23 is oscillated and displaced with its pivotal portion 26 as a fulcrum. By pulling down the rear portion of the seat cushion 5, the occupant's hip point H located at the rear portion of the seat cushion 5 can be effectively moved downward in the rear portion according to its height.

  Accordingly, since the height of the occupant is high, the sight line of the occupant who is likely to be positioned above the appropriate line can be effectively moved downward to match the sight line, and the cushion frame 2 In addition, the seat cushion 5 is in a tilted state where the rear part of the seat cushion 5 is lowered in accordance with the rearward movement of the seat cushion 5, so that a tall person whose leg length increases according to his / her height is cramped. In order to avoid this, there is an advantage that this tall person can obtain a sitting posture in which the knee bending angle is reduced and the lower part of the knee is extended forward.

  Further, in the above embodiment, the rear coupling member 27 that couples the pair of left and right cushion frames 2 is provided at the rear portion of the cushion frame 2, and the coupling portion 28 of the rear link member 23 is coupled to the rear coupling member 27. Without providing a separate connection pin or the like for connecting the connecting portion 28 of the rear link member 23 to the cushion frame 2, both can be connected with a simple configuration. In addition, the rear portion of the cushion frame 2 sufficiently secured by the rear coupling member 27 can be smoothly raised and lowered by the rear link member 23.

  Further, as shown in the above-described embodiment, the rear link member 23 is formed in a substantially triangular shape in a side view, and the pivotal support portion 26, the connecting portion 28, and the engaging portion 30 are provided at each vertex portion of the rear link member 23. When disposed, the rear link member 23 can be effectively moved up and down with a compact configuration while preventing the rear link member 23 from interfering with peripheral members, and the rear link member Even when 23 is in the rear lower position, it is possible to prevent the lower end portion of the rear link member 23 from interfering with the floor surface without taking measures such as positioning the floor panel downward. In addition, the movement locus of the rear part of the seat cushion 5 and the hip point of the occupant can be variously changed by appropriately changing the installation interval of the pivotal support part 26, the connecting part 28, and the engaging part 30. There is.

  In particular, in the above embodiment, as the rear link member 23 moves to the raising drive position of the cushion frame 2, the connecting portion 28 for the cushion frame 2 provided on the rear link member 23 has a substantially triangular shape in side view. Since the positional relationship of the pivotal support portion 26, the connecting portion 28, and the engaging portion 30 is set so as to be displaced to the apex portion of the rear link member 23 formed on the rear link member 23, the rear link member 23 is moved at the advanced position of the cushion frame 2. It will be installed in the shape of a narrowed triangle as seen from the side. Therefore, it is possible to effectively prevent the connecting portion 28 provided in the rear link member 23 from interfering with the seat cushion 5 and the like when the cushion frame 2 moves back and forth. In addition, when the rear link member 23 is in the raising drive position of the cushion frame 2, the pivotal support portion 26 is positioned on the lower front side, and the engagement portion 30 is positioned on the lower rear side. Thus, there is an advantage that the rear link member 23 can be stably held in the ascending drive position.

  Further, in the above-described embodiment, the pivot support member 3 is disposed on the cushion frame 2 and supports the seat cushion 5. The pivot support shaft 36 pivotally supports the cushion support member 3 on the cushion frame 2. Since the support portion and the angle adjustment mechanism 37 for adjusting the installation angle of the seat cushion 5 by swinging and displacing the cushion support member 3 with the pivot portion as a fulcrum are provided, regardless of the front and rear positions of the seat cushion 5, There is an advantage that the seating posture can be appropriately adjusted according to the preference or the like.

  For example, when the seat cushion 5 is moved to the front side of the vehicle body as shown in FIG. 7 for the purpose of aligning the line of sight of the occupant with a low seat height with the appropriate line, the rear link member 23 is provided. Since the rear end portion of the seat cushion 5 is pushed up by the elevating drive mechanism 14, the occupant bends the knee largely to prevent the occupant having a short foot from separating the foot from the floor surface. While it is possible to obtain a sitting posture that hangs down at an angle, the sitting posture tends to be unstable for people with long legs. Therefore, a person with a low seat height and a long leg, as shown in FIG. 9, using the angle adjustment mechanism 37 with the seat cushion 5 moved to the front side of the vehicle body as described above, as shown in FIG. 3 is driven so as to raise the front end of the seat cushion 5 so that the seat cushion 5 is in an upwardly inclined state, so that there is an advantage that a leg can be extended and a stable seating state can be obtained.

  As described above, the angle adjustment mechanism 37 that adjusts the installation angle of the seat cushion 5 is provided, for example, a vehicle for export to Europe and the United States where a passenger with a relatively long limb is likely to be seated, and a relatively short limb. When a vehicle for domestic sale in which a passenger is likely to be seated is configured such that the front end portion of the seat cushion 5 can be moved up and down in advance by the angle adjusting mechanism 37 to change the inclination angle thereof, the seat cushion In this case, it is highly possible that an extremely tall occupant is seated on the seat cushion 5 while an extremely short occupant is seated on the seat cushion 5 while preventing the front and rear movement range of the seat 5 from increasing. There is an advantage that the sitting posture can be adjusted easily and appropriately according to its height.

  In the above embodiment, the cushion support member 3 supports the seat cushion 5 on the cushion frame 2, and the rear portion of the cushion frame 2 supports the lower portion of the seat back 6. When a vehicle collision accident or the like occurs while the seat is seated, a large impact load or the like acting on the cushion frame 2 from the seat back 6 can be prevented from being input to the support portion of the seat cushion 5. . Therefore, it is possible to effectively prevent a situation in which the support state of the seat cushion 5 by the cushion support member 3 becomes unstable due to an impact load or the like acting on the cushion frame 2 from the seat back 6. .

  The lifting drive mechanism 14 includes a rear link member 23 formed in a substantially triangular shape in a side view and a support member 24 on the vehicle body side that slidably supports an engagement portion 30 provided below the rear portion. Instead, as shown in FIGS. 10 to 12, the drive link member 51 is swingably supported by the support bracket 50 provided on the upper rail 11, and is fixed to the lower rail 10 via the mounting bracket 52. It is good also as a structure provided with the raising / lowering support mechanism which has the supporting member 53 which supports the front-end part of the drive link member 51. The drive link member 51 is made of a plate material formed in a rod shape when viewed from the side, and a central portion thereof is pivotally supported by the support bracket 50 and a rear end portion thereof is coupled to the cushion frame 2. ing.

  That is, the drive link member 51 is pivotally supported by the support bracket 50 attached to the upper surface of the rear portion of the upper rail 11 via the support shaft 54, so that the drive link is supported on the support shaft 54. The member 51 is supported so as to be swingable. Further, the front end portion of the drive link member 51 is slidably engaged with a guide groove 55 formed in the support member 53 via an engagement pin 56, and the support member 53 in which the guide groove 55 is formed. An elevating drive unit comprising a side wall plate 60 is disposed on the inner side of the seat slide rail 1. Further, the rear end portion of the drive link member 51 is locked to a rod-like rear coupling member 27 installed so as to couple the rear portions of the left and right cushion frames 2 to each other via the rear coupling member 27. And is connected to the rear portion of the cushion frame 2.

  The support member 53 is provided at the front wall portion 57 and the rear wall portion 58, the bottom wall portion 59 installed at the lower end portion thereof, and the front and rear wall portions 57 and 58 and the inner end portions of the bottom wall portion 59. The side wall plate 60 constitutes an extending portion installed so as to extend downward from the central portion in the front-rear direction of the lower rail 10 in a side view. The side wall plate 60 constituting the extending portion is formed with a guide groove 55 having an inclined portion inclined forward and a horizontal portion of a predetermined length provided at both front and rear ends thereof.

  The mounting bracket 52 includes a holding portion 61 that holds the front and rear wall portions 57 and 58 and the bottom wall portion 59 of the support member 53 from below, and a pair of mounting portions 62 and 63 that project from the front and rear. The front and rear wall portions 57 and 58 and the bottom wall portion 59 of the support member 53 are fixed to the holding portion 61 by means such as bolting, riveting or spot welding, and the mounting portions 62 and 63 are connected to the lower rail. As shown in FIG. 11, the side wall plate 60 of the support member 53 is welded or bolted to the lower surface of the seat 10, so that the inner side of the seat slide rail 1 in the front view, that is, the center in the width direction. It is comprised so that it may attach to the lower rail 10 in the state arrange | positioned by the part side. Further, a gap for disposing the drive link member 51 is formed between the side wall plate 60 of the support member 53 and the inner side surface portion of the lower rail 10, and the side wall plate of the support member 53 is formed in the gap. A drive link member 51 is arranged between 60 and the cushion frame 2.

  Then, the engagement pin 56 of the drive link member 51 is slidably engaged with the elevating drive unit composed of the side wall plate 60 of the support member 53 in which the guide groove 55 is formed. During movement, the engagement pin 56 provided at one end of the drive link member 51 is slidably supported by the support member 53, while the drive link member 51 swings around the support shaft 54 provided on the upper rail 11. The rear portion of the cushion frame 2 is configured to be moved up and down by being dynamically displaced.

  That is, as shown in FIG. 10, when the upper rail 11 and the cushion frame 2 are positioned on the rearmost side of the seat slide rail 1, the engagement pin 56 provided at the front end portion of the drive link member 51 is guided into the guide groove. When the upper rail 11 and the cushion frame 2 are driven and slid to the front side of the vehicle body by the seat drive mechanism 13 from the state of being located at the rearmost end portion of the body 55, the engagement pin 56 extends along the guide groove 55. Thus, the front end portion of the drive link member 51 is guided by the guide groove 55 and gradually descends, and accordingly, the drive link member 51 is swung in the direction in which the drive link member 51 stands up with the support shaft 54 as a fulcrum. As a result, the rear coupling member 27 to which the rear end portion is connected is displaced upward as shown in FIG. So that the rear portion of the cushion frame 2 is pushed accordingly.

  Also in the above configuration, the drive link member 51 and the front end portion thereof are supported by a simple and compact configuration in accordance with an operation for adjusting the front / rear position of the seat cushion 5 constituting the occupant seat according to the physique of the occupant. Advantages such as that the installation height of the seat cushion 5 can be adjusted effectively so that the cushion frame 2 can be oscillated and displaced to properly ensure the sight of the occupant and the like by the lifting support mechanism having the supporting member 53 to support. There is.

  That is, in the above-described embodiment, the central portion is pivotally supported by the upper rail 11 so as to be swingable, and one end portion is connected to the cushion frame 2 and the lower rail 10 is fixed to the lower rail 10 and the drive. And a support member 53 that supports the base end portion of the link member 51, and the support member 53 includes an elevating drive unit that includes an extending portion that extends downward from the center portion of the lower rail 10 in the front-rear direction in the side view. The drive link member 51 is oscillated and displaced with the shaft support portion as a fulcrum according to the back and forth movement of the cushion frame 2 while the other end portion of the drive link member 51 is slidably supported by the lift drive portion. Since the rear part of the cushion frame 2 is driven to move up and down, the lifting and lowering drive comprising the extending part of the support member 53 is performed. Parts and a drive link member 51 driven by the elevation driving unit, there is an advantage that the above cushion frame 2 can be disposed compactly in polymerized located in a side view.

  In particular, in the above embodiment, a connecting portion that connects the rear end portion of the drive link member 51 to the rear portion of the cushion frame 2, and an engaging portion that engages the front end portion of the drive link member 51 with the extending portion of the support member 53. And a guide groove 55 that is lowered forward is formed in the extending portion of the support member 53, and the engaging portion of the drive link member 23 is slid along the guide groove 55, whereby the drive link member Since the connecting portion 51 is configured to be displaced up and down, the space 53 formed in the lower portion of the seat slide rail 1 is effectively used to dispose the support member 53 having a sufficient size in the space. Thus, the installation range of the guide groove 55 and the entire length of the drive link member 51 can be set large, and the longitudinal movement distance of the seat cushion 5 should not be set so large. The vertical movement of the seat cushion 5 to sufficiently ensure there is an advantage that an installation state according to the physical structure of the occupant can be effectively ensured.

1 is a perspective view showing an embodiment of an automobile seat device according to the present invention. It is a side view of the said vehicle seat apparatus. It is the figure which looked at the said vehicle seat apparatus from back. It is the IV-IV sectional view taken on the line of FIG. It is a plane sectional view showing a sheet driving mechanism. It is side surface sectional drawing which shows the principal part structure of the vehicle seat apparatus which concerns on this invention. It is side surface sectional drawing which shows the state which advanced the seat cushion. It is a perspective view which shows the specific structure of an angle adjustment mechanism. It is side surface sectional drawing which shows the state which raised the front part of the seat cushion. It is side surface sectional drawing which shows another embodiment of the vehicle seat apparatus which concerns on this invention. It is a perspective view which shows the specific structure of a raising / lowering drive mechanism. It is the XII-XII sectional view taken on the line of FIG. It is side surface sectional drawing which shows the state which advanced the seat cushion. It is explanatory drawing which shows the prior art example of the vehicle seat apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat slide rail 2 Cushion frame 10 Lower rail 11 Upper rail 13 Seat drive mechanism 14 Elevation drive mechanism 23 Rear link member 24 Support member 26 Pivot part 27 Rear joint member 28 Connection part 30 Engagement part 32 Standing plate (elevation drive part)
51 Drive link member 53 Support member 60 Side wall plate (lifting drive unit)

Claims (5)

  A seat slide rail composed of a pair of left and right lower rails fixed on the floor of the passenger compartment and extending in the front-rear direction of the vehicle body, and a pair of left and right upper rails slidably supported along the lower rail, and front and rear together with the upper rails An automotive seat device having a cushion frame supported so as to move, wherein an elevating drive unit that elevates and lowers a rear portion of the cushion frame in accordance with a back-and-forth movement of the cushion frame is provided on an inner side portion of the seat slide rail. An automotive seat device, characterized in that it is disposed on the side.   A rear link member provided at the rear portion of the cushion frame; and a support member provided on the vehicle body side to support the rear link member. The pivot member supported by the upper rail on the rear link member; A connecting portion connected to the rear portion and an engaging portion to be engaged with the support member on the vehicle body side are provided, and the lifting drive portion is provided on the support member on the vehicle body side. While slidably supporting the joint portion, the rear link member is oscillated and displaced with the pivotal support portion as a fulcrum according to the forward and backward movement of the cushion frame, thereby moving the connecting portion of the rear link member up and down to move the cushion frame. The automobile seat device according to claim 1, wherein the rear portion is driven to move up and down.   The automobile according to claim 2, wherein the rear link member is formed in a substantially triangular shape in a side view, and the pivotal support portion, the coupling portion, and the engagement portion are arranged at each vertex portion of the rear link member. Sheet equipment.   A rod-like drive link member whose center portion is pivotally supported by the upper rail and whose one end is connected to the cushion frame, and a support member that is fixed to the lower rail and supports the base end of the drive link member And provided in the support member an elevating drive part comprising an extending part extending downward from the lower rail central part in the front-rear direction of the lower rail in a side view, and the other end of the drive link member by the elevating drive part The rear portion of the cushion frame is driven up and down by swinging and displacing the drive link member with the shaft support portion as a fulcrum according to the back and forth movement of the cushion frame. The automobile seat device according to claim 1.   A connecting portion for connecting the rear end portion of the drive link member to the rear portion of the cushion frame, and an engaging portion for engaging the front end portion of the drive link member with the extension portion of the support member, and extending the support member It is characterized in that a front guide groove is formed in the part, and the engaging part of the drive link member is slid along the guide groove to displace the connecting part of the drive link member up and down. The automobile seat device according to claim 4.

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