JP5043385B2 - Automotive seat device - Google Patents

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, when the front end of the seat cushion 71 is driven by the lever arm 74 to change the inclination angle of the seat surface according to the back-and-forth movement of the seat cushion 71 as described above, the length of the lever arm 74 is increased. If the lever ratio is not sufficiently secured, for example, by extremely increasing the height, it is difficult to change the hip points H1 to H3 of the occupants J1 to J3 remarkably and the support state of the seat cushion 71 is unstable. There is a problem that it is cheap. This is because, even if the front end portion of the seat cushion 71 is driven by the lever arm 74, the hip points H1 to H3 of the occupant located in the rear portion cannot be changed so much. Accordingly, in order to bring the viewpoints I1 to I3 closer to the appropriate line L, it is necessary to set the lever ratio of the lever arm 74 to an extremely large value, and to the front end portion of the seat cushion 71 supported by the lever arm 74. It is inevitable that rattling is likely to occur. Therefore, when the seat cushion 71 is moved back and forth according to the occupant's physique and the like, it has been desired to change the hip point easily and appropriately.

  In view of the above-described circumstances, the present invention sets the seat cushion installation height so that the occupant's field of view and the like can be appropriately secured according to the operation of adjusting the front / rear position of the occupant seat in accordance with the physique of the occupant. An object of the present invention is to provide an automobile seat device that can be effectively adjusted.

The invention according to claim 1 is a seat slide rail 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 rails. And a cushion frame that is supported so as to move back and forth together with the upper rail, a connecting member that connects a front portion of the cushion frame to the upper rail, and a rear portion provided at the rear portion of the cushion frame A link member, and a support member provided on the vehicle body side for supporting the rear link member, and a pivot support portion pivotally supported by the upper rail, a connection portion coupled to the rear portion of the cushion frame, and the rear link member; And an engagement portion that is engaged with the support member on the vehicle body side. While slidably supporting the engaging portion of the hook member, the connecting portion of the rear link member is moved up and down by swinging and displacing the rear link member with the pivot portion as a fulcrum according to the back and forth movement of the cushion frame. A slide drive unit for raising and lowering the rear part of the cushion frame is provided , a pivotal support part to the upper rail is provided at the front part of the rear link member, a connection part to the cushion frame is provided above the rear part of the rear link member, and the rear link An engaging portion to the support member on the vehicle body side is provided at the lower portion of the member .

The invention according to claim 2, in vehicle seat apparatus according to claim 1, the rear portion of the cushion frame, provided with a coupling member for coupling the pair of left and right cushion frame between, the rear link member to the coupling member The connecting part is connected.

According to a third aspect of the present invention, in the automobile seat device according to the first or second aspect, the rear link member is formed in a substantially triangular shape in a side view, and the pivot is formed at each vertex of the rear link member. A support part, a connection part, and an engagement part are arranged.

According to a fourth aspect of the present invention, in the automobile seat device according to the third aspect , the connection to the cushion frame provided on the rear link member according to the rear link member moving to the ascending drive position of the cushion frame. The positional relationship between the pivotal support portion, the connecting portion, and the engaging portion is set so that the portion is displaced toward the upper vertex side of the rear link member formed in a substantially triangular shape in a side view.

According to a fifth aspect of the present invention, in the automobile seat device according to any one of the first, third , and fourth aspects, the vehicle-side support member includes a rear side to a front side of the seat in a side view of the seat. A gentle S-shaped slide groove portion in which the upward slope gradually decreases after the upward slope gradually increases toward the rear is formed, and the engaging portion of the rear link member is slidably engaged with the slide groove portion. It is a thing.

According to a sixth aspect of the present invention, in the automobile seat device according to any one of the first, third , and fourth aspects, the vehicle-side support member includes a rear side to a front side of the seat in a side view of the seat. A slide groove portion inclined so as to rise linearly toward is formed, and an engagement portion of a rear link member is slidably engaged with the slide groove portion.

According to the first aspect of the present invention, when the upper rail and the cushion frame are moved back and forth along the lower rail, the engagement portion of the rear link member is slid along the slide drive portion of the support member. The hip link, which is the seating center of the occupant seated on the seat cushion, is effectively moved up and down by swinging and displacing the rear link member with the pivot portion as a fulcrum and driving the rear portion of the seat cushion up and down. In addition, there is an advantage that the movement trajectory of the hip point can be variously changed according to the installation state of the slide drive unit and the swing displacement state of the rear link member. In addition, a pivotal support portion for the upper rail is provided at the front portion of the rear link member, a connection portion to the cushion frame is provided above the rear portion of the rear link member, and the engagement with the support member on the vehicle body side is provided at the lower portion of the rear link member. Since the joint portion is provided, the rear link member can be swung and displaced in accordance with the forward / backward movement of the seat cushion, so that the rear portion of the seat cushion can be driven up and down significantly, so that the lever ratio of the rear link member is extremely large. The hip point, which is the seating center of the occupant, can be effectively moved up and down in accordance with the swinging displacement of the rear link member without taking any measures such as, and without causing rattling of the seat cushion. it can.

In the invention according to claim 2 , since the coupling member for coupling the pair of left and right cushion frames is provided at the rear portion of the cushion frame, and the coupling portion of the rear link member is coupled to the coupling member, the coupling portion of the rear link member Can be connected with a simple structure without providing a separate connecting pin for connecting the cushion frame to the cushion frame, and the rear portion of the cushion frame with sufficient rigidity secured by the rear coupling member. There is an advantage that it can be smoothly driven up and down by the rear link member.

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 such a 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.

In the invention according to the fourth aspect , as the rear link member moves to the rising drive position of the cushion frame, the connecting portion for the cushion frame provided on the rear link member is formed in a substantially triangular shape in a side view. Since the positional relationship among the pivotal support portion, the connecting portion, and the engaging portion is set so as to be displaced toward the upper vertex side of the rear link member, the connecting portion provided on the rear link member is moved when the cushion frame moves forward. There is an advantage that interference with the cushion pan or the cushion frame can be effectively prevented.

In the invention according to claim 5 , in accordance with the back-and-forth movement of the seat cushion, the engagement portion of the rear link member is slid and displaced along the slide groove portion having a gentle S-shape and a forwardly rising path. By significantly raising and lowering the rear part, the hip point of the occupant seated on the seat cushion can be displaced so as to draw a gentle S-shaped trajectory, without increasing the longitudinal movement distance of the seat, There is an advantage that the seating posture, the viewpoint position, and the like can be appropriately changed in accordance with the change in the occupant's body shape.

In the invention according to claim 6 , the rear link member is slid and displaced along the slide groove portion that is linearly inclined upward as the seat cushion is moved forward and backward. Thus, there is an advantage that the rear portion of the seat cushion can be easily lifted and lowered without requiring a large driving force.

  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. As the cushion frame 2 moves back and forth along the lower rail 10, 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. Correspondingly, when the connecting link member 12 swings and displaces with the lower pivot portion as a fulcrum, the cushion frame 2 swings and displaces with the front coupling member 16 pivotally supported at the upper end portion as a fulcrum. It has become.

  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, in the side view of the seat, a pivot portion 26 pivotally supported on the inner surface of the rear portion of the upper rail 11 via the pivot shaft 25 is provided at the front portion of the rear link member 23, and 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 of the left and right cushion frames 2 is provided, and a lower portion of the rear link member 23 has a support on the vehicle body side. An engagement portion 30 that is engaged with the member 24 via an engagement pin 29 is provided.

  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. It has an upright plate 32 that rises upward on the inner side, more specifically, on the lower side of the inner side of the cushion frame 2. The upright plate 32 is formed with a slide drive portion including a slide groove portion 33 that is inclined forward and upward at a steep angle with respect to the seat slide rail 1, and the engagement pin 29 is slidably engaged with the slide groove portion 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 at the lower portion of the rear link member 23 is engaged with the engagement portion. Since the pin 29 is engaged with the slide groove 33 inclined at a steep angle, the upper rail 11 and the cushion frame 2 are located on the rearmost side of the seat slide rail 1 as shown in FIGS. Thus, in a state where the engagement pin 29 provided at the lower portion of the rear link member 23 is positioned at the rearmost end portion of the slide groove portion 33, the engagement portion 30 is moved downward from the seat slide rail 1 to the maximum. 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 at the lower portion of the rear link member 23 slides and displaces along the slide groove portion 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 among the pivotal support portion 26, the connecting portion 28, and the engaging portion 30 is set so as to be positioned on the upper apex side 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. Further, the rear portion of the cushion frame 2 is pushed up by the elevating drive mechanism 14 having 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, a connecting member comprising a connecting link member 12 for connecting a front portion of the cushion frame 2 to the upper rail 11, and a cushion A rear link member 23 provided at the rear portion of the frame 2 and a support member 24 provided on the vehicle body side and supporting the rear link member 23, are pivotally supported by the upper link 11 on the rear link member 23. 26, a connecting portion 28 connected to the rear portion of the cushion frame 2, and a support on the vehicle body side. An engagement portion 30 that is engaged with the member 24 is provided, and the engagement portion 30 of the rear link member 23 is slidably supported by the support member 24 on the vehicle body side, and the cushion frame 2 is moved back and forth. Then, the rear link member 23 is oscillated and displaced with the pivot 26 as a fulcrum, thereby moving the connecting portion 28 of the rear link member 23 up and down to slide up and down the rear part of the cushion frame 2. The height of the seat cushion 5 is set so that the sight of the occupant can be properly secured in accordance with the operation of adjusting the front and rear positions of the seat cushion 5 constituting the occupant seat in accordance with the physique of the occupant. There is an advantage that can be adjusted effectively.

  That is, when a short occupant is seated on the seat cushion 5, the upper rail 11 and the cushion frame 2 are slid to the front side of the vehicle body by the seat drive mechanism 13, and as shown in FIG. The seat cushion 5 is lifted and moved forward along the lower rail 10 of the seat slide rail 1, and the engagement pin 29 provided in the engagement portion 30 of the rear link member 23 is moved from the slide groove portion 33 of the support member 24. By sliding and displacing along the slide drive portion, the rear portion of the rear link member 23 rises at a steep angle, and the rear portion of the seat cushion 5 connected thereto is greatly pushed up. Hip point H, the seating center of the occupant located at the rear, It can be effectively moved to the front upwards by response.

Further, as the engaging portion 30 of the rear link member 23 slides and displaces along the slide groove portion 33, the rear link member 23 swings and displaces with the pivot portion 26 as a fulcrum, whereby the seat cushion rear portion. Therefore, the movement trajectory can be variously changed without being limited only to the inclination angle of the slide groove portion 33. That is, as described above , 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 link member 23 When the engaging portion 30 to the support member 24 on the vehicle body side is provided in the lower portion, the rear link member 23 swings and displaces in the 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 according to 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. The sight line of the occupant can be effectively moved upward without causing rattling in the seat cushion 5 and the sight line of the occupant is likely to be positioned below the appropriate line because of the low height. Can match. In addition, when the cushion frame 2 and the seat cushion 5 are moved forward, the rear portion thereof is pushed up via the lifting drive mechanism 14, so that the front coupling member 16 provided at the upper end portion of the connecting link member 12 is moved. Since the cushion frame 2 swings and displaces at the fulcrum and the seat cushion 5 is installed at a horizontal angle, the foot of a short occupant who tends to shorten the foot length according to the height is placed on the floor. 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 surface.

  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 the seat cushion 5 is lowered along the lower rail 10 and the engaging pin 29 is slid along the slide groove portion 33 of the support member 24, 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. Then, as the engagement portion 30 of the rear link member 23 slides and displaces along the slide groove portion 33, the rear link member 23 is oscillated and displaced with its pivotal support portion 26 as a fulcrum, to the rear of the seat cushion 5. By pulling down the part, the hip point H of the occupant located at the rear part of the seat cushion 5 can be effectively moved downward in the rear part corresponding 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 embodiment, the rear link member 23 is formed in a substantially triangular shape in a side view of the seat, and the pivot portion 26, the connecting portion 28, and the engaging portion are formed at each apex portion of the rear link member 23. When 30 is disposed, the rear portion of the cushion frame 2 can be effectively lifted and lowered with a compact configuration while preventing each portion of the rear link member 23 from interfering with the peripheral members. Even when the rear link member 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, by appropriately changing the installation intervals of the pivotal support portion 26, the connecting portion 28, and the engaging portion 30, the rear portion of the seat cushion 5 and the movement locus of the hip point H can be variously changed. There is.

In particular, in the above-described embodiment, as the rear link member 23 moves to the raising drive position of the cushion frame 2, the connecting portion 28 with respect to the cushion frame 2 provided on the rear link member 23 is substantially in a side view of the seat. 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 toward the upper apex side of the rear link member 23 formed in a triangular shape, the rear link is at the forward position of the cushion frame 2. The member 23 is installed in a triangular shape that is narrowed when viewed from the side. Therefore, when the cushion frame 2 moves forward, it is possible to effectively prevent the connecting portion 28 provided on the rear link member 23 from interfering with the cushion pan 4 or the seat cushion 5. 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.

  Instead of the above-described embodiment in which the engaging pin 29 provided in the engaging portion 30 of the rear link member 23 is slidably engaged with the slide groove portion 33 formed in the support member 24, the rear link is provided. A slide driving portion comprising a concave fitting portion into which a tip portion such as an engaging pin protruding from the engaging portion of the member 23 is inserted is formed in the support member 24, and this concave fitting portion is formed when the cushion frame is moved back and forth. The rear link member may be oscillated and displaced about the pivot 26 as a fulcrum by slidingly displacing the engagement pin and the like.

Further, as shown in the above embodiment, when the support member 24 formed with the slide drive portion including the slide groove portion 33 is disposed on the inner side of the seat slide rail 1, the support member 2 is used. It is possible to prevent the appearance from being deteriorated due to the exposure of the vehicle 4 in the passenger compartment and to effectively use the space by arranging the seat slide rail 1 and the support member 24 in the dead space formed below the seat cushion 5. There is an advantage that can be achieved.

  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 elevating driving mechanism 1 4 trailing end of the seat cushion 5 is pushed, so as not for the legs short occupant and a state where the toe is separated from the floor, the knee portion the occupant is bent greatly knee While it is possible to obtain a sitting posture that hangs down at a predetermined angle, the sitting posture tends to be unstable for a person 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. .

  In addition, it replaces with the said embodiment formed in the vehicle side support member 24, and the slide groove part 33 inclined so that it may linearly raise toward the front side from the back side of a sheet | seat is shown in FIG. As described above, the vehicle-side support member 24 has a rear inclined portion 55 in which the upward gradient gradually increases from the rear side to the front side of the seat in a side view of the seat, and the upward gradient gradually decreases on the front side. A loose S-shaped slide groove portion 57 having a front inclined portion 56 may be formed, and the engagement portion 30 of the rear link member 23 may be slidably engaged with the slide groove portion 57 by an engagement pin 29. .

  According to the above-described configuration, the rear portion of the seat cushion 5 is driven to move up and down by sliding the engagement portion 30 of the rear link member 23 along the loose S-shaped slide groove portion 57 in accordance with the longitudinal movement of the seat cushion 5. By doing so, the hip point H of the occupant seated on the seat cushion 5 can be displaced so as to draw a gentle S-shaped locus as shown in FIG. There is an advantage that the seating posture, the viewpoint position, and the like can be appropriately changed in response to a change in the occupant's body shape without increasing the size. That is, when the height of the occupant is medium, there is a tendency that a significant difference occurs in the seat height according to the change in the height, so that the hip point H is set according to the back-and-forth movement of the seat cushion 5 as described above. By displacing so as to draw a gentle S-shaped trajectory M2, the occupant's viewpoint I can be matched with the appropriate line L, the leg bending angle can be set appropriately, and the sitting posture can be maintained in a good state, etc. There are advantages. In addition, when the slide groove part 57 is formed in a gentle S-shape as described above, the inclination angle is maximized at the boundary portion T between the rear inclined part 55 and the front inclined part 56, so that the seat cushion 5 responds to the forward movement. Therefore, the driving load when the engaging pin 29 passes through the boundary portion T increases, and accordingly, the driving force of the seat driving mechanism 13 needs to be set sufficiently.

  On the other hand, as shown in FIG. 12, the support member 24 on the vehicle side is formed with a slide groove portion 33 inclined so as to rise linearly from the rear side of the seat toward the front side in a side view of the seat. When the engagement portion 30 of the rear link member 23 is slidably engaged with the slide groove portion 33 by the engagement pin 29, the engagement portion of the rear link member 23 is moved in accordance with the forward movement of the seat cushion 5. When the slide 30 is slid along the slide groove 33, a large load fluctuation does not occur. Therefore, the rear link member 23 is smoothly oscillated and displaced without requiring a large driving force so that the rear portion of the seat cushion 5 can be moved. Can be driven up and down easily. Further, by displacing the hip point H so as to draw a trajectory M1 of an upward projecting state in accordance with the back-and-forth movement of the seat cushion 5, the occupant's viewpoint I can be matched with the appropriate line L.

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 top sectional view showing the concrete composition of a sheet drive 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 a side view which shows another embodiment of the vehicle seat apparatus which concerns on this invention. It is explanatory drawing which shows the effect | action in another embodiment of this invention. It is explanatory drawing which shows the effect | action in basic embodiment of this invention. It is explanatory drawing which shows the prior art example of this invention.

DESCRIPTION OF SYMBOLS 1 Seat slide rail 2 Cushion frame 3 Cushion support member 4 Cushion pan 5 Seat cushion 6 Seat back 10 Lower rail 11 Upper rail 12 Connection link (connection member)
DESCRIPTION OF SYMBOLS 13 Seat drive mechanism 14 Elevation drive mechanism 23 Back link member 24 Support member 26 Pivot part 27 Rear part coupling member 28 Connection part 30 Engagement part 33 Slide groove part (slide drive part)
57 Slide groove (slide drive)

Claims (6)

A seat slide rail comprising 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 rails, and moves back and forth together with the upper rails. A cushion frame that is supported in the manner described above, a connecting member that connects the front portion of the cushion frame to the upper rail, a rear link member provided at the rear portion of the cushion frame, and a vehicle body side And a support member that supports the rear link member, and engages with the rear link member, a pivot part pivotally supported by the upper rail, a connecting part connected to the rear part of the cushion frame, and a support member on the vehicle body side. And an engaging portion of the rear link member on the support member on the vehicle body side. The rear link member is pivoted and displaced with the pivotal support as a fulcrum according to the back and forth movement of the cushion frame while supporting the cushion frame freely, and the rear link member is moved up and down to raise and lower the rear part of the cushion frame. A slide drive unit is provided , a pivotal support to the upper rail is provided at the front part of the rear link member, a connection part to the cushion frame is provided above the rear part of the rear link member, and the vehicle body side is provided below the rear link member. An automobile seat device comprising an engaging portion for supporting the support member . The automobile seat device according to claim 1, wherein a coupling member that couples the pair of left and right cushion frames is provided at a rear portion of the cushion frame, and a coupling portion of a rear link member is coupled to the coupling member . 3. 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 apex portion of the rear link member. Car seat device. As the rear link member moves to the rising drive position of the cushion frame, the connecting portion for the cushion frame provided on the rear link member is on the upper vertex side of the rear link member formed in a substantially triangular shape in a side view. 4. The vehicle seat device according to claim 3 , wherein a positional relationship between the pivotal support portion, the connecting portion, and the engaging portion is set so as to be displaced . The vehicle-side support member is formed with a loose S-shaped slide groove portion in which the upward gradient gradually decreases after the upward gradient gradually increases from the rear side to the front side of the seat in a side view of the seat. 5. The vehicle seat device according to claim 1, wherein an engaging portion of the rear link member is slidably engaged with the slide groove portion . The support member on the vehicle side is formed with a slide groove portion inclined so as to rise linearly from the rear side to the front side of the seat in a side view of the seat, and the rear link member is engaged with the slide groove portion. The vehicle seat device according to claim 1 , wherein the portion is slidably engaged.

Images