JP3993528B2 - Vehicle seat with tip-up mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat such as an automobile seat in which a seat cushion is attached so as to be able to be chipped up.
[0002]
[Prior art]
Some rear seats for automobiles equipped with a tip-up mechanism fold up along the seat back by flipping up the front part with the rear part of the seat cushion as the center of rotation by the tip-up mechanism.
[0003]
Also, when the seat cushion is flipped up, the rear side of the seat cushion is pivotally attached to the position away from the lower part of the front surface of the seat back so that the rear side of the seat cushion does not interfere with the seat back. An arm that connects the seat cushion and a base frame pivotally attached to the seat cushion is disclosed (see Patent Document 1).
[0004]
[Patent Document 1]
[Patent Document 1] Japanese Patent Laid-Open No. 20034009
[Problems to be solved by the invention]
The tip-up mechanism provided in the seat is configured such that the seat cushion is locked to the base frame by engaging the lock gear with the sector gear provided on the seat cushion side.
[0006]
The above sector gear is separately attached to the cushion frame of the seat cushion and is rotatably attached to the cushion frame, and one of the arms is integrally fixed to the rotation center of the sector gear.
[0007]
Therefore, this conventional product requires a plurality of arms, and in order to prevent the deformation of the sector gear, it is necessary to reinforce the arm for attaching the sector gear and the sector gear, a cushion frame, and the like.
[0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to eliminate a problem in the lock structure of such a tip-up mechanism.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a pair of left and right base frames fixed to the vehicle floor side directly or via a ride rail, a cushion frame pivotally mounted inside the left and right base frames, and the left and right cushions. Reinforcing member installed between the frames in a freely rotatable manner, a fixing piece fixed to the protruding portion of the reinforcing member, a connecting link connected between the fixing piece and the base frame, and an inner side from the cushion frame of the reinforcing member A sector gear provided integrally, and a lock gear provided on the inner surface of the cushion frame to engage with the sector gear and release the engaged state with the sector gear by the operating force of the operating lever.
[0010]
Therefore, the reinforcement member built by the sector gear on the cushion frame
Sector gear and cushion frame are each fixed
Reinforced. Therefore, it is not necessary to reinforce each member separately.
[0011]
In addition, a reinforcing member is rotatably installed between the left and right cushion frames.
The reinforcement member is attached to the sector gear arranged on one cushion frame side.
Insert and weld, and protrude outward from the cushion frame of this reinforcement member
A fixed piece is welded to the fixed portion, and the upper end of the connecting link is pivoted to the fixed piece.
By wearing it, the sector gear where the load concentrates is reinforced, and at the same time
The rigidity of the frame is improved and the sector is provided on one side of the cushion frame.
-The cushion frame will not be deformed by the gear.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2 show a frame structure of an automobile seat according to the present invention, in which 1 and 1 are directly on the vehicle floor or through an upper rail 92 of a slide rail 9 for adjusting the longitudinal position of the seat, as shown. 2 shows a pair of left and right base frames fixed together. In the figure, reference numeral 91 denotes a lower rail that slidably fits the upper rail 92.
[0013]
A back frame 12 of a seat back is connected to the base frame 1 through a reclining device so as to be tiltable. Figure 11 is a movable arm for connecting the back frame 12 together, the movable arm 11 is pivotally mounted to the base frame 1 by rotation shaft 1 0.
[0014]
Further, a cushion frame 2 of a seat cushion is disposed inside the pair of left and right base frames 1, 1, and the left and right sides of the rear side of the cushion frame 2 are pivotally attached to the base frame 1 by hinges 20. A connecting link 3 is rotatably connected by pins 30 and 31 between a fixed piece 32 (described later) of the cushion frame 2 positioned in front of the hinge 20 and the base frame 1.
[0015]
Therefore, the cushion frame 2 is attached to the base frame 1 so that the front side can be flipped up around the hinges 20 and 20 as shown in the chain line in FIG. It is configured to move.
[0016]
Further, as shown in FIG. 3, a sector gear 4 is provided on one side surface of the cushion frame 2, and a lock gear 6 that engages with the sector gear 4 is attached to the cushion frame 2 by a pin 60 so as to be swingable. It has been.
[0017]
A sector gears 4, pipes made of reinforcing members 42 rotatably bridged right of the sector gears 4 a cushion frame 2 to one side of the cushion frame over arm 2 is provided is inserted, the sector gears to the reinforcing member 42 4 is integrally welded.
[0018]
The reinforcing member 42 is disposed below the sector gear 4, and a tip-up lock portion 40 for tip-up and a tilt-up gear 41 for tilting up the seat cushion are provided above the sector gear 4. The seat cushion is attached to the base frame 1 so as to be able to tilt up in addition to tip-up.
[0019]
In FIG. 2, reference numeral 32 denotes a fixing piece 43, 44 that is integrally welded to the reinforcing member 42 of the portion protruding from the outer surface of the cushion frame and pivotally attaches the connecting link 3 to the upper portion by a pin 30. Indicates connecting pipes constituting the cushion frame 2.
[0020]
As shown in FIG. 4, the lock gear 6 that engages with the sector gear 4 engages with the tilt up gear 41, and one end portion 6A abuts against the tip up lock portion 40, and the side surface of the other end portion 6B. The locking portion 61 is urged in the sector gear 4 direction by a spring 72 stretched between the other end surface 6B and the cushion frame 2.
[0021]
The guide pins 62 and 63 provided on the lock gear 6 are inserted into the long hole 52 provided in the operation lever 5 and are arranged along the end edge 54 as shown in FIGS.
[0022]
As shown in FIG. 2, the operation portion 5A of the operation lever 5 is disposed so that one end is positioned below the front side of the cushion frame 2, the operation portion 5A is urged downward by the spring 71, and the stopper portion 53 is An operating portion 5A is pivotally attached to the inner side surface of the cushion frame 2 by a pivot pin 50 so as to be able to rotate in the vertical direction so as to abut against the support plate of the cushion frame 2.
[0023]
As shown in FIG. 4, the above connecting link 3 is attached to the pin 30 at the upper end portion of the fixed piece 32 as shown in FIG. 2 outside the sector gear 4 in the cushion frame 2.
[0024]
3 and 4, reference numeral 20 </ b> A denotes a through hole for inserting the hinge 20, and 31 </ b> A denotes an insertion hole for the pin 31.
[0025]
As described above, since the tip-up mechanism is configured, when the operation portion 5A of the operation lever 5 is pulled upward against the elasticity of the spring 71, the guide pins 62 and 63 joined to the operation lever 5 are pushed down. Therefore, the lock gear 6 having the pins 62 and 63 integrally is rotated around the pin 60 and the one end portion 6A is rotated upward, that is, in the disengagement direction from the sector gear 4. The engaging portion 61 to be engaged is detached from the tilt up gear 41.
[0026]
Therefore, the seat cushion 2 is flipped up as shown by a chain line in FIG. In this state, the engaging portion 61 is abutted and locked to the tip-up lock portion 40.
[0027]
【The invention's effect】
According to the first aspect of the present invention, since the cushion frame and the sector gear are integrated, the cushion frame and the sector gear are reinforced, so that it is not necessary to reinforce each member independently. Therefore, weight reduction can be achieved.
[0028]
Further, the cushion frame by the reinforcing member, the sector gears is reinforced Rutotomoni, improved rigidity, such as the cushion frame can be prevented from deformation or the like of the cushion frame.
[Brief description of the drawings]
FIG. 1 is a side view showing a frame structure of a seat according to the present invention.
FIG. 2 is a perspective view of FIG.
FIG. 3 is a cutaway perspective view of a main part of the present invention.
FIG. 4 is an exploded perspective view of a main part.
[Explanation of symbols]
1 Base frame 2 Cushion frame 3 Link 4 Sector gear 5 Operation lever 6 Lock gear

Claims (1)

A pair of left and right base frames that are fixed directly to the vehicle floor or via slide rails,
Cushion frame that pivots inside the left and right base frames,
Reinforcing members that are rotatably installed between the left and right cushion frames,
A fixed piece fixed to the protruding part of this reinforcing member,
A connecting link connected between the fixed piece and the base frame;
Sector gear integrally provided on the inner side from the cushion frame of the reinforcing member,
A lock gear which is provided on the inner surface of the cushion frame and engages with the sector gear and releases the engaged state with respect to the sector gear by the operating force of the operating lever;
A vehicle seat with a tip-up mechanism.

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