JP4899204B2 - Automotive seat height adjustment device - Google Patents

Description

  The present invention relates to an automobile seat height adjusting device equipped with an entire seat so that the height can be adjusted.

There has been known one in which a seat is assembled on a slide rail via an automobile seat height adjusting device (see, for example, Patent Document 1). As shown in FIG. 8 , the vehicle seat height adjusting device includes left and right standing brackets 1a and 1b installed on the rail of the upper rail A of the slide rail S, and a seat side frame 2 of the seat cushion. It is installed between. Further, a pair of left and right links 3 and 4 are provided at the front and rear of the seat, and each link 3 and 4 is provided between the seat mounting brackets 1a and 1b and the seat side frame 2 via support shafts 3a, 3b, 4a and 4b. The link base frame 15 is assembled on the basis of the link and the links 3 and 4 held together by the connecting shafts 5 and 6.

  In order to operate the link base frame 15, an operation knob 7 disposed on one side of the seat side frame 2, a pinion gear 8 that is coaxially connected to the rotation shaft 7 a of the operation knob 7 and is attached to the inside of the seat side frame 2, A sector gear 9 that meshes with the pinion gear 8 and is rotatably attached to the seat side frame 2 by a support shaft 9a, and a link rod 10 that is connected between the sector gear 9 and the rear link 4 are provided.

  In this automobile seat height adjusting device, the front and rear links 3 and 4 are maintained in the rearward position in the lowermost state of the seat height. When the operation knob 7 is operated to rotate from this state, the pinion gear 8 is rotated, and the sector gear 9 is swung in a direction having a small radius around the support shaft 9a, so that the link rod 10 has the support shaft 9b as a fulcrum. Move by pulling forward. Along with this, the rear link 4 is pulled in the direction of rising with the pivot pin 11 as a fulcrum, and the front link 3 rises and swings, so that the seat height can be adjusted high. The seat height can be adjusted to a lower position again by operating the operation knob 7 in the reverse direction.

  In such an automobile seat height adjusting device, when the rigidity of the link base frame 15 is insufficient, the front and rear links 3 and 4 and surrounding members are bent when a large load is applied. Is difficult to hold stably, or it becomes difficult to adjust the seat height. Therefore, it is desired to ensure the rigidity of the link base frame 15. However, in the front side link 3 in which the operation knob 7 is arranged, it is necessary to ensure the operation of other members such as the sector gear 9 and the link rod 10, so that there are many restrictions on the arrangement and shape of the front side link 3 and the link. It is not easy to ensure sufficient rigidity of the base frame 15.

WO 2004 / 094180A1 publication

  SUMMARY OF THE INVENTION An object of the present invention is to provide an automobile seat height adjusting device that easily secures the rigidity of a link base frame with a simple configuration and easily holds the seat stably by the link base frame.

The present invention provides a connecting shaft that integrally holds the left and right front and rear links (3), (4) and the left and right links of the front and rear links (3), (4) disposed in front and rear of the seat. Based on the link base frame (15) assembled from (5), (6) and the link rod (10) that connects the front and rear links (3), (4) to the front and rear ,
The front and rear links (3), (4) can be pivoted by pivots (3a, 3b, 4a, 4b) between the seat installation bracket (1a, 1b) and the seat side frame (2). passing over the, a rotatable pinion gear by the knob operation (8), by the in rotatable substantially fan-shaped sector gear (9) pinion gear (8) meshed the pinion (8) in an arc shaped portion, the front side, In a vehicle seat height adjusting device capable of adjusting the seat height by swinging the rear links (3), (4) ,
The sector gear (9) is provided with a connecting pin (9b) protruding toward the front link (3) ,
The front link (3) is provided with an extension (3d) extending from the position of the support shaft (3b) with respect to the seat side frame (2) of the front link (3) ,
The extension (3d) of the front link (3) has an arcuate shape centering on a support shaft (3b) with respect to the seat side frame (2) of the front link (3) , and the front link (3) the length of the long holes to allow the error between rotation amount of the swing amount and the sector gear (9) and (24b) provided,
The connecting pin (9b) is inserted into the long hole (24b) of the front link , and the inner end is pivotally supported on the end of the link rod (10) facing the front link (3). And connected to the link rod (10) .

According to the present invention, the connecting pin protruding toward the front link is provided on the sector gear, the extension extending from the position of the support shaft with respect to the seat side frame of the front link is provided , and the support shaft with respect to the seat side frame of the front link is the center. In order to provide a long hole in the extension of the front link that allows an error between the amount of swing of the front link and the amount of rotation of the sector gear , the sector gear and the extension of the front link are connected with a connecting pin. Even if they are connected, it is possible to make the rotation amount of the rear link connected to the sector gear via the link rod different from the rotation amount of the link rod by making the respective rotation amounts different. It can be made to swing more appropriately.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the accompanying drawings, a vehicle seat height adjusting device according to an embodiment shown in FIG. 1 supports the entire seat (not shown) so that it can be moved back and forth. A pair of slide rails S (hereinafter, only one side is shown) is provided, and the entire seat is provided on a slide type seat which is installed on the floor surface of the vehicle body floor by the lower rail R. Moreover, it is equipped as what adjusts the height of the whole sheet | seat including a seat back from the seat cushion of a reclining type seat.

  In the vehicle seat, the height adjusting device includes a link base provided between the standing brackets 1a and 1b as left and right seat installation brackets installed on the rail of the upper rail A and the seat side frame 2. The frame 15 is assembled on the base. The link base frame 15 is disposed inside the seat side frame 2 and includes a pair of left and right links 3 and 4 on the front and rear of the seat. The links 3 and 4 are provided with the standing brackets 1a and 1b and the seat side frame 2 respectively. And the left and right of the links 3, 4 are assembled together by connecting shafts 5, 6.

  The front link 3 is disposed on the inner surface side of the left and right seat side frames 2. Each of the front links 3 is formed symmetrically, and a main body portion 3c that is spanned between the seat side frame 2 and the standing bracket 1a, and an extension that is extended from the main body portion 3c so as to have a substantially square shape. It consists of a plate member having a portion 3d. The main body 3c is pivotally supported on the seat side frame 2 by the support shaft 3b at the upper end of the main body 3c, which is the middle part of the front link 3, and the lower end is supported by the support bracket 1a by the support shaft 3a. By being pivotally supported by the shaft, it is mounted on the standing bracket 1 a and the seat side frame 2.

The rear link 4 is disposed on the inner surface side of the left and right seat side frames 2 in the same manner as the front link 3 . The rear link 4 on one side has a main body portion 4c spanned between the seat side frame 2 and the standing bracket 1b, and a substantially square plate having an extension portion 4d extending upward from the main body portion 4c. It consists of members. The rear link 4 on the other side is a plate member (not shown) formed in a substantially linear shape corresponding to the main body 4c without the extension 4d.

In the rear link 4, the left and right sides are integrally held by the connecting shaft 6 near the upper end of one main body portion 4 c and the upper end of the other body portion 4 c. Although the detailed illustration is omitted, the rear link 4 is pivotally supported on the plate surface of the seat side frame 2 by a support shaft 4b that protrudes outward in the vehicle width direction from both ends of the connecting shaft 6, and the lower end is close to the lower end. By being pivotally supported on the standing bracket 1 b by the support shaft 4 a, it is mounted on the standing bracket 1 b and the seat side frame 2.
In this embodiment, the distance between the support shafts 4 a and 4 b of the rear link 4 is longer than the distance between the support shafts 3 a and 3 b of the front link 3.

  Protruding stoppers 3e and 4e are provided on the lower edge of the main body 3c of the left and right front links 3 and the lower edge between the support shafts 4a and 4b of the left and right rear links 4, respectively. ing. The stopper portions 3e and 4e are provided so as to come into contact with the upper rail A when the seat height reaches the lowermost position.

  In this height adjusting device, as shown in FIGS. 2 to 4, an operation knob 7 for swinging the link base frame 15 up and down is provided on one side of the sheet, and the operation knob 7 and the link base frame 15 are provided. Are connected by an operation transmission unit 20 and assembled.

  The operation knob 7 has a lever shape and is attached to a gear case 22 fixed along the outer side of the front side link 3 of the seat side frame 2. Although not shown in detail, the operation knob 7 includes a rotating shaft 7a and a ratchet mechanism 7c that can be releasably locked at every predetermined rotation angle. By inserting and fixing the bearing frame 7b (see FIG. 3) outside the plate surface of the gear case 22 while the tip end portion of the rotating shaft 7a is inserted inside the plate surface of the gear case 22 and supported by the seat side frame 2. It is installed.

The operation knob 7 can be rotated by a predetermined amount in both the upward r1 and downward r2 directions from the neutral position P on the side surface side of the seat side frame 2 shown in FIG. 1, and the neutral position P is released by releasing the rotation operation. Is equipped with an automatic return. By repeating this rotation and return of the operation knob 7, the rotation amount of the rotary shaft 7a can be increased or decreased by a predetermined amount by the ratchet mechanism 7c.

  The operation transmission unit 20 is rotatably disposed in an accommodation space 22 a formed between the outer surface of the seat side frame 2 and the inner surface of the gear case 22, and the pinion gear 8 fixed to the rotation shaft 7 a of the operation knob 7. Similarly, a sector gear 9 as a rotation transmitting member that is rotatably arranged in the accommodation space 22a and meshed with the pinion gear 8, and an extension of the sector gear 9 and the rear link 4 that is arranged on the inner surface side of the seat side frame 2. It is assembled with a link rod 10 connecting the portion 4d.

  The sector gear 9 is supported by the support shaft 3b of the front side link 3 disposed through the seat side frame 2. The support shaft 3b has a pair of parallel surfaces 3g on the side peripheral surface, and is fitted to the through-hole 2g of the seat side frame 2 having a shape corresponding to the side peripheral surface. It is fixed so that it cannot rotate.

The sector gear 9 is pivotally supported at the end of the support shaft 3b so as to be rotatable with respect to the seat side frame 2 about the support shaft 3b. Since the front side link 3 is pivotally supported at the other end of the support shaft 3b, the sector gear 9 is attached to the front side link 3 so as to be relatively rotatable. The sector gear 9 has a substantially sector shape that spreads from the support side by the support shaft 3b, and is engaged with the pinion gear 8 at the arc-shaped portion thereof. It is provided so as to be rotatable within a range.

  The pinion gear 8 and the sector gear 9 are disposed so as to be rotatable inside the accommodation space 22 a, so that displacement between the outer surface of the seat side frame 2 and the inner surface of the gear case 22 is restricted. In this embodiment, the pinion gear 8 and the sector gear 9 are slidably sandwiched between the deformed portion 22b deformed on the inner surface side of the gear case 22 and the seat side frame 2, so that the pinion gear 8 and the sector gear 9 are engaged. The displacement in the vicinity of the mating site is more reliably regulated.

  As shown in FIGS. 2 and 4, a connecting pin 9b that protrudes inward is fixed at a position that is eccentric to the support shaft 3b of the sector gear 9 and on the rear side of the pinion gear 8 so as not to rotate. Is provided. On the other hand, at a position corresponding to the connecting pin 9b of the seat side frame 2, a long hole 24a as an arc-shaped through-hole centering on the support shaft 3b is provided. The connecting pin 9b is disposed so as to pass through the long hole 24a and protrude to the inside of the seat side frame 2. The length of the long hole 24 a is formed to allow the maximum amount of rotation of the sector gear 9.

  Furthermore, an arc-shaped long hole 24b centered on the support shaft 3b is provided at a position corresponding to the connecting pin 9b of the extension 3d of the front link 3. The connecting pin 9b is disposed to project inside the front link 3 through the long hole 24b. The length of the elongated hole 24b of the extension 3d is determined by the amount of rotation of the front link 3 caused by the difference in length between the main body 3c of the front link 3 and the main body 4c of the rear link 4, and the sector gear 9 It is formed in a length that allows a difference from the amount of rotation. The width of the long hole 24b can be formed so as to prevent displacement of the connecting pin 9b in the width direction by making the connecting pin 9b slidable.

The link rod 10 is connected to the position eccentric from the support shaft 3b of the sector gear 9 by pivotally supporting the inner end portion of the connecting pin 9b protruding inside the front side link 3 to the link rod 10. . The link rod 10 connects the inner end of the connecting pin 9b and the connecting pin 9c fixed to the extension 4d of the rear link 4, thereby rotating the sector gear 9 in the front-rear direction. Is provided to communicate to.

  A spiral spring 25 is arranged at a position inside the seat side frame 2 between the front link 3 and the sector gear 9 as shown in FIGS. As shown in FIG. 5, the spiral spring 25 has an inner end fixed to a pair of parallel surfaces 3 g of the support shaft 3 b that supports the sector gear 9 and the front link 3 in a non-rotatable manner.

  The spiral spring 25 has an inner end wound around the support shaft 3b, and an outer end locked to a connecting pin 9b that connects the sector gear 9 and the link rod 10, whereby the sector gear 9 is The front link 3 and the rear link 4 of the link base frame 15 are biased in the turning direction that is the rising direction.

  On the other hand, in the seat side frame 2 on the side where the operation knob 7 is not disposed, the operation transmitting portion 20 is not provided, and as shown in FIG. 6, an extension portion of the front link 3 is provided outside the seat side frame 2. A reinforcing plate 26 having a shape corresponding to 3d is arranged. The reinforcing plate 26 is fixed to the extension portion 3d of the front link 3 so as not to move by a connecting pin 3f provided at a position eccentric from the support shaft 3b disposed through the seat side frame 2. Further, an arc-shaped long hole 24a is provided around the support shaft 3b at a position corresponding to the connecting pin 3f of the seat side frame 2, and the connecting pin 3f is disposed in a state of passing through the long hole 24a. . The reinforcing plate 26 is attached to the front link 3 so as to be rotatable about the support shaft 3b.

  A spiral spring 25 similar to that described above is disposed at a position inside the seat side frame 2 between the reinforcing plate 26 and the front link 3. The spiral spring 25 has an inner end that is non-rotatably locked to the support shaft 3b and an outer end that is locked to the connecting pin 3f. The front link 3 of the link base frame 15 is directly connected to the rising direction. Is energized.

  In the vehicle seat height adjusting apparatus configured as described above, as shown in FIG. 1, when the overall seat height is arranged at the lowest position, the sector gear 9 rotates in a state of being engaged with the pinion gear 8. It is arranged on one end side of the range. As a result, the front and rear links 3 and 4 are kept in a rearward state in a state where the link rod 10 is pushed later by the sector gear 9. At this time, the stopper portions 3e and 4e of the links 3 and 4 are in contact with the upper rail A on which the standing brackets 1a and 1b are installed.

  From this state, when the operation knob 7 is rotated in the direction of the arrow r1 in FIG. 1, the pinion gear 8 is rotated via the ratchet mechanism 7, and the pinion gear 8 is supported between the seat side frame 2 and the gear case 22. This rotation is transmitted to the sector gear 9 and is urged by the spiral spring 25, while the sector gear 9 rotates around the support shaft 3b toward the other end of the rotation range. As a result, the link rod 10 connected to the sector gear 9 by the connecting pin 9b is pulled forward and moved, and the rear link 4 is pulled in the direction of rising with the support shaft 4a as a fulcrum. At this time, the front link 3 on the side where the operation knob 7 b is not provided is also urged by the spiral spring 25 in the rising direction.

As the operation knob 7 is turned, the link base frame 15 swings upward, and the overall height of the seat increases as shown in FIG. After the turning operation of the operation knob 7 is completed, the rotary shaft 7a is locked by the ratchet mechanism 7c, and the height of the entire sheet after being lifted is maintained.
In order to lower the overall height of the seat, the operation knob 7 is turned in the direction of the arrow r2 opposite to the above, and the link base frame 15 is swung downward while the seat weight is loaded. It is done by moving.

  According to the vehicle seat height adjusting apparatus as described above, the front link 3 integrally has the extension 3d extending outward from the support shaft 3b on the seat side frame 2 side, and the extension 3d of the front link 3 is provided. Further, since the connecting pin 9b for connecting the sector gear 9 and the link rod 10 is connected, the front link 3 is connected to the support shaft 3a on the upright bracket 1a side, the support shaft 3b on the seat side frame 2 side, and the sector gear 9 It is supported at three locations of the connecting pin 9b and is not easily bent. And since the front side link 3, the sector gear 9, and the link rod 10 which are easy to load a big load are mutually connected by one point, it can prevent that each bends separately. Therefore, the rigidity of the link base frame 15 can be ensured, and the seat can be stably held even when a large load such as a seat load or an occupant's weight is applied with the seat raised.

  Here, the sector gear 9 and the main body portion 3c of the front link 3 are pivotally connected to the support shaft 3b so as to be pivotable to the seat side frame 2, and are connected to each other. Since the sector gear 9 rotates coaxially, the connecting pin 3f of the sector gear 9 can be easily connected to the extension 3d of the front link 3, and the configuration can be simplified. At the same time, it is possible to prevent the sheet height adjustment operation from becoming difficult due to bending or the like.

  The sector gear 9 and the front link 3 are provided so as to be relatively rotatable, and a connecting pin 9b for connecting the sector gear 9 and the link rod 10 is a long hole formed in the extending portion 3d of the front link 3 in the rotation direction. Since it is supported by 24b, even if the sector gear 9 and the extension part 3d of the front link 3 are connected by the connecting pin 9b, the respective rotation amounts can be made different. Therefore, the amount of rotation of the rear side link 4 connected to the sector gear 9 via the link rod 10 can be made different from the amount of rotation of the front side link 3, and the link base frame 15 can be swung more appropriately. Is possible.

It is a side view which shows the height adjustment apparatus of the vehicle seat which concerns on this invention in a low setting state. It is a disassembled perspective view around the front side link of the height adjustment device for a car seat according to the present invention. It is a BB end view of FIG. It is CC end view of FIG. It is a side view which shows the state which mounted | wore with the spiral spring in the height adjustment apparatus of the vehicle seat which concerns on this invention from the inner side of a seat side frame. FIG. 3 is a cross-sectional view corresponding to the BB end surface of FIG. 1 showing the periphery of the side frame on the side where the operation knob of the automobile seat height adjusting device according to the invention is not provided. It is a side view which shows the height adjustment apparatus of the vehicle seat which concerns on this invention in a high setting state. It is a side view which shows the height adjustment apparatus of the conventional vehicle seat in the low setting state.

DESCRIPTION OF SYMBOLS 1a, 1b Seat installation bracket 2 Seat side frame 3 Front side link 3a, 3b Support shaft 3c Main body part 3d Extension part 3e Stopper part 4 Rear side link 4a, 4b Support shaft 4c Main part 4d Extension part 5, 6 Connection shaft 7 Operation knob 8 Pinion gear 9 Sector gear 10 Link rod 15 Link base frame 20 Operation transmission part 22 Gear case 25 Spiral spring 26 Reinforcement plate

Claims (1)

The front and rear links (3) and (4) of the left and right pairs arranged before and after the seat, and the connecting shaft (5) for integrally holding the left and right of the front and rear links (3) and (4), Based on the link base frame (15) assembled from (6) and the link rod (10) for connecting the front and rear links (3), (4) to the front and rear ,
The front and rear links (3), (4) can be pivoted by pivots (3a, 3b, 4a, 4b) between the seat installation bracket (1a, 1b) and the seat side frame (2). passing over the, a rotatable pinion gear by the knob operation (8), by the in rotatable substantially fan-shaped sector gear (9) pinion gear (8) meshed the pinion (8) in an arc shaped portion, the front side, In a vehicle seat height adjusting device capable of adjusting the seat height by swinging the rear links (3), (4) ,
The sector gear (9) is provided with a connecting pin (9b) protruding toward the front link (3) ,
The front link (3) is provided with an extension (3d) extending from the position of the support shaft (3b) with respect to the seat side frame (2) of the front link (3) ,
The extension (3d) of the front link (3) has an arcuate shape centering on a support shaft (3b) with respect to the seat side frame (2) of the front link (3) , and the front link (3) the length of the long holes to allow the error between rotation amount of the swing amount and the sector gear (9) and (24b) provided,
The connecting pin (9b) is inserted into the long hole (24b) of the front link , and the inner end is pivotally supported on the end of the link rod (10) facing the front link (3). An apparatus for adjusting the height of an automobile seat, wherein the apparatus is connected to the link rod (10) .

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