JP2009227011A - Seat with manually height adjusting mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat with a manual lifter lever which is at a neutral lock position when releasing operating force and lifts a seat frame up and down relative to a seat supporting rail when rocked up and down from the neutral lock position, enabling to restrict the operating angle of the manual lifter lever depending on the height position of the seat frame without sacrificing the operability. <P>SOLUTION: The seat comprises a stroke variable stopper mechanism provided on the seat frame for changing the maximum rocking operation angle of the manual lifter lever down from the neutral lock position to be smaller as a distance between the seat frame and the seat supporting rail is shorter. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a seat having a manual height adjusting mechanism used for a driver's seat of a passenger car, for example.

In general, a seat of a vehicle driver's seat equipped with a manual height adjustment mechanism supports a seat frame fixed to the lower surface of the cushion seat so that the seat frame can be moved up and down with respect to a seat support rail fixed to the vehicle floor. In addition, a manual height adjustment mechanism for changing the height position of the seat frame with respect to the seat support rail is provided. The manual height adjustment mechanism is provided on the seat frame and has a neutral lock position when the operation force is released, and the seat supports the seat support rail when swinging up and down from the neutral lock position. It has a manual lifter lever that moves the frame up and down. Such a manual height adjustment mechanism is well known (Patent Documents 1 and 2).
JP 2000-190762 A JP 2002-120610 A

  A seat with such a manual height adjustment mechanism cannot be operated depending on the height position of the seat frame (seat) (when the seat frame is lowered), the manual lifter lever approaches the floor and hits the floor. There is a problem of becoming. If the rotation angle of the manual lifter lever is set small, the collision between the manual lifter lever and the floor surface can be avoided, but the operability is sacrificed.

  The present invention is based on such a problem consciousness, and a seat having a manual height adjustment mechanism capable of regulating the operation angle of the manual lifter lever according to the height position of the seat frame without sacrificing operability. The purpose is to obtain.

  A seat seat according to the present invention includes a seat support rail fixed to a vehicle floor; a seat frame fixed to the lower surface of the cushion seat and supported so as to be movable up and down on the seat support rail; and a neutral lock position when the operating force is released. A manual height adjusting mechanism provided on the seat frame; and a manual height adjusting mechanism provided on the seat frame; and a manual lifter lever for moving the seat frame up and down with respect to the seat support rail And a variable stroke stopper mechanism provided in the seat frame that changes the maximum swinging operation angle downward from the neutral lock position of the manual lifter lever as the distance to the support rail decreases. .

  The seat support rail and the seat frame can be coupled by, for example, a four-bar linkage mechanism.

  Specifically, for example, the manual height adjusting mechanism employs a mechanism having a pinion that rotates forward and backward by a forward and reverse swinging operation of a manual lifter lever, and a sector gear that interlocks with a four-bar linkage mechanism that meshes with the pinion. be able to. The variable stroke stopper mechanism can use a stopper lever that uses the pinion of the manual height adjustment mechanism to change the distance from the manual lifter lever in conjunction with the rotation of the pinion.

  The stopper lever has a sector gear that meshes with the pinion of the manual height adjustment mechanism, and is the simplest configuration if it is a lever pivotally attached to the seat frame.

  The present invention has a manual height adjustment having a neutral lock position when the operating force is released, and a manual lifter lever that moves the seat frame up and down with respect to the seat support rail when swinging up and down from the neutral lock position. In a seat with a mechanism, as the distance between the seat frame and the seat support rail decreases, the seat frame is provided with a variable stroke stopper mechanism that changes the maximum swing operation angle of the manual lifter lever downward. Since the maximum swinging angle of the lifter lever is changed between the high position and the low position, the seat frame can be operated without sacrificing the operability when the seat frame is at a high position. The inconvenience that the lifter lever collides with the vehicle floor when in the low position can be avoided. Further, since the variable stroke stopper mechanism is provided on the seat frame, the stopper mechanism can be configured regardless of the configuration of the seat support rail.

  The figure shows only one of the seat support rail 10 and the seat frame 20 that are disposed as a pair below the vehicle seat. The seat support rail 10 includes a lower rail 11 that is fixed to the vehicle floor, and an upper rail 12 that is slidably engaged with the lower rail 11.

  The seat frame 20 fixed to the lower part of the seat cushion (seat) and the upper rail 12 of the seat support rail 10 are pivotally connected by front and rear links 21 and 22. That is, the upper end portion and the lower end portion of the front link 21 are pivotally attached to the seat frame 20 and the upper rail 12 by the axes A and B in the seat width direction, and the upper end portion and the lower end portion of the rear link 22 are similarly arranged in the seat width direction. Are pivotally attached to the seat frame 20 and the upper rail 12. The upper rail 12, the seat frame 20, the front link 21, and the rear link 22 constitute a four-bar linkage mechanism. The rear link 22 has a sector gear 22G centered on the axis C. When rotation about the axis C is given to the rear link 22 via the sector gear 22G, the front link 21 and the rear link 22 swing. The seat frame 20 moves up and down with respect to the upper rail 12 (seat support rail 10).

  A manual height adjusting mechanism (brake mechanism) 30 having a pinion 31 that meshes with the sector gear 22G of the rear link 22 is supported on the seat frame 20. The axis of the pinion 31 is directed in the width direction of the seat, and at the same time, the sector gear 25G of the stopper lever 25 pivotally attached to the seat frame 20 by the shaft 24 parallel to the pinion 31 is engaged with the pinion 31. The stopper lever 25 is supported between the sub bracket 26 and the seat frame 20, and the sub bracket 26 simultaneously has a support hole 26H that rotatably supports the tip of the pinion 31 of the manual height adjusting mechanism 30. ing. The end of the sub bracket 26 opposite to the shaft 24 is fixed to the seat frame 20 via a spacer 27, and the rear link 22 has a through-arc hole centered on the axis C through which the spacer 27 passes. 22C is formed.

  The manual height adjustment mechanism 30 includes a manual lifter lever 32 that is coaxial with the pinion 31 and extends forward. The manual lifter lever 32 is located at the neutral lock position 32C in FIG. 1 when the external force is released, and brakes the rotation of the pinion 31 (the rotation of the pinion 31 is not allowed). On the other hand, when the swing operation is performed upward from the neutral lock position 32C, the pinion 31 is rotated in the direction of raising the seat frame 20, and conversely, when the swing operation is performed downward from the neutral lock position 32C, the pinion 31 is moved to the seat frame. It rotates in the direction to lower 20. Such a manual height adjusting mechanism 30 is well known. The maximum swinging operation position upward and downward of the manual lifter lever 32 is indicated by 32U and 32D, and the operation angle from the neutral lock position 32C is α.

  The stopper lever 25 of the manual height adjusting mechanism 30 has a stopper end 25S bent in a direction perpendicular to the plane of the seat frame 20 at the end opposite to the sector gear 25G across the shaft 24. The end portion 25 </ b> S passes through the through-arc shaped hole 20 </ b> C formed in the seat frame 20 and protrudes to the side that interferes with the manual lifter lever 32. The height position of the stopper end portion 25S is changed by forward / reverse rotation about the shaft 24 of the stopper lever 25 accompanying forward / reverse rotation of the pinion 31. That is, when the seat frame 20 is positioned at the maximum ascending position (uppermost position) shown in FIG. 1, the swing operation between the neutral lock position 32C and the maximum downward swing position 32D of the manual lifter lever 32 is not restricted. . On the other hand, when the pinion 31 is rotated in the direction in which the seat frame 20 is lowered, the stopper end 25S reduces the distance from the manual lifter lever 32 and moves from the neutral lock position 32C of the manual lifter lever 32 to the maximum downward swing position 32D. Regulates the maximum operating angle. FIG. 2 shows the maximum lowering position (lowermost position) of the seat frame 20. In this lowermost position, the operable angle downward from the neutral lock position 32C of the manual lifter lever 32 is the restricted operation position from the neutral lock position 32C. 32D ′ (operation angle α ′, α> α ′).

  That is, when the seat frame (seat) 20 is at the highest position, the seat seat having the manual height adjusting mechanism of the present embodiment has no limitation on the swing operation angle of the manual lifter lever 32, and the neutral lock position 32C. The seat frame 20 can be lowered by swinging the manual lifter lever 32 toward the maximum downward swing position 32D. On the other hand, when the seat frame 20 is lowered, the stopper lever 25 is rotated by the rotation of the pinion 31, and the stopper end 25S is brought closer to the manual lifter lever 32. Therefore, as the seat frame 20 is lowered, the maximum swinging operation angle downward from the neutral lock position 32C of the manual lifter lever 32 is narrowed, and the manual lifter lever 32 collides with the floor surface or the operation becomes impossible. Does not occur. The operation from the neutral lock position 32C of the manual lifter lever 32 to the maximum upward swing position 32U is not limited by the height position of the seat frame 20.

  In the above embodiment, the sector gear 22G that meshes with the pinion 31 of the manual height adjustment mechanism 30 is provided on the rear link 22 that constitutes the four-bar linkage mechanism together with the upper rail 12, the seat frame 20, and the front link 21, but the front link 21, A sector gear that meshes with the pinion 31 may be provided separately from the rear link 22, and the rotation of the sector gear may be transmitted to the front link 21 or the rear link 22.

It is a side view of the uppermost position of a seat frame showing one embodiment of a seat having a manual height adjusting mechanism according to the present invention. It is a side view of the same lowermost position. It is sectional drawing which follows the III-III line of FIG. It is the same exploded perspective view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seat support rail 11 Lower rail 12 Upper rail 20 Seat frame 21 Front link 22 Back link A B C D Four-link mechanism shaft 22G Sector gear 24 Shaft 25 Stopper lever 25G Sector gear 25S Stopper end 30 Manual height adjustment mechanism 31 Pinion 32 Manual Lifter lever 32C Neutral lock position 32U Maximum upward swing position 32D Maximum downward swing position

Claims (4)

Seat support rail fixed to the vehicle floor;
A seat frame fixed to the lower surface of the cushion seat and supported by the seat support rail so as to be movable up and down;
A manual lifter lever that has a neutral lock position when operating force is released and moves the seat frame up and down relative to the seat support rail when swinging up and down from the neutral lock position is provided on the seat frame. A manual height adjustment mechanism; and provided in the seat frame that changes the maximum swing operation angle downward from the neutral lock position of the manual lifter lever as the distance between the seat frame and the seat support rail decreases. Stroke variable stopper mechanism;
A seat having a manual height adjusting mechanism. 2. A seat with a manual height adjusting mechanism according to claim 1, wherein the seat support rail and the seat frame are coupled by a four-bar linkage mechanism. 3. A seat including the manual height adjusting mechanism according to claim 2, wherein the manual height adjusting mechanism includes a pinion that rotates forward and backward by a forward and reverse swinging operation of a manual lifter lever, and the four-bar link that meshes with the pinion. The variable stroke stopper mechanism includes a manual height adjustment mechanism having a stopper lever that changes the distance from the manual lifter lever in conjunction with the rotation of the pinion. Seat seat. 4. The seat having the manual height adjusting mechanism according to claim 3, wherein the stopper lever has a sector gear that meshes with the pinion of the manual height adjusting mechanism.

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