JP2004330986A - Seat for vehicle with tip-up mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To lighten a seat for a vehicle with a tip-up mechanism. <P>SOLUTION: A sector gear 4 constituting the tip-up mechanism is integrated with a cushion frame 2, and a reinforcing member 42 is integrally welded to the sector gear 4. The cushion frame 2 is connected with a base frame 1 by a connection link 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle seat such as an automobile seat to which a seat cushion is attached so as to be able to tip up (bounce up).
[0002]
[Prior art]
In some automotive rear seats provided with a tip-up mechanism, the front-up portion is flipped up around a rear portion of a seat cushion and rotated along a seat back by the tip-up mechanism to be folded along a seatback.
[0003]
Also, when the seat cushion is flipped up, the rear side of the seat cushion is pivotally connected to the seat back with a one-point hinge at a position away from the lower front part of the seat back so that the rear side of the seat cushion does not interfere with the seat back. (See Patent Document 1) that connects the seat cushion and a base frame that pivotally connects the seat cushion with the arm.
[0004]
[Patent Document 1] JP-A-2003-4009
[Problems to be solved by the invention]
The tip-up mechanism provided on the seat is configured to lock the seat cushion to the base frame by engaging the lock gear with a sector gear provided on the seat cushion side.
[0006]
The above-mentioned sector gear is separately mounted on the cushion frame of the seat cushion so as to be rotatable with respect 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 sector gear, the arm on which the sector gear is mounted, the cushion frame, and the like.
[0008]
Then, an object of the present invention is to eliminate such a defect in the lock structure of the tip-up mechanism.
[0009]
[Means for Solving the Problems]
A vehicle seat with a tip-up mechanism according to the present invention for achieving the above object is provided with a pair of left and right base frames fixed directly to the vehicle floor or via a slide rail, and rotatable inside the left and right base frames. A cushion frame to be pivotally connected, a connection link connected between the cushion frame and the base frame, a sector gear integrally provided on the inner surface of the one cushion frame, and a sector gear provided on the inner surface of the cushion frame for the sector gear. And a lock gear for releasing the engagement with the sector gear by the operating force of the operating lever.
[0010]
Therefore, since the sector gear is integrally fixed to the cushion frame, the sector gear and the cushion frame are each reinforced. Therefore, it is not necessary to reinforce each member separately.
[0011]
Further, a reinforcing member is provided between the left and right cushion frames, the reinforcing member is inserted into one of the cushion frames and the sector gear and welded, and a fixing piece is welded to a portion of the reinforcing member protruding outside from the cushion frame. By pivotally connecting the upper end of the connection link to the fixing piece, the sector gear on which the load is concentrated is reinforced, and the rigidity of the cushion frame is improved, and the sector gear provided on one side of the cushion frame is improved. Therefore, the cushion frame is not deformed.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 show a frame structure of an automobile seat according to the present invention. In the drawings, reference numerals 1 and 1 are provided on a vehicle floor directly or as shown in FIG. 5 shows a pair of left and right base frames fixed to each other. In the drawing, reference numeral 91 denotes a lower rail in which the upper rail 92 is slidably fitted.
[0013]
A back frame 12 of the seat back is tiltably connected to the base frame 1 via a reclining device. In the figure, reference numeral 11 denotes a movable arm that integrally connects the back frame 12, and the movable arm 11 is pivotally attached to the base frame 1 by a rotation shaft 12.
[0014]
Also, a cushion frame 2 of a seat cushion is disposed inside the pair of left and right base frames 1, 1, and the rear left and right sides of the cushion frame 2 are pivotally attached to the base frame 1 by hinges 20. A connection link 3 is rotatably connected between the cushion frame 2 located in front of the hinge 20 and the base frame 1 by pins 30 and 31.
[0015]
Accordingly, the cushion frame 2 is attached to the base frame 1 such that the front side can be flipped up about the hinges 20 and 20 as the rotation center, as shown by the chain line in FIG. It is configured to be movable.
[0016]
As shown in FIG. 3, a sector gear 4 is integrally fixed to one side surface of the cushion frame 2, and a lock gear 6 engaged with the sector gear 4 is attached to the cushion frame 2 by a pin 60 so as to be swingable. Have been.
[0017]
The sector gear 4 and one side surface of the cushion frame 2 to which the sector gear 4 is fixed are inserted with reinforcing members 42 made of pipes provided on the left and right sides of the cushion frame 2. The reinforcing members 42 are connected to the sector gear 4 and the cushion frame 2. Are welded together.
[0018]
The reinforcing member 42 is disposed below the sector gear 4, and a chip-up lock portion 40 for tip-up and a tilt-up gear 41 for tilting up the seat cushion are provided at the upper portion of 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 chip up.
[0019]
In FIG. 2, reference numeral 32 denotes a fixing piece that is integrally welded to the reinforcing member 42 at a portion protruding from the outer surface of the cushion frame and pivotally connects the connecting link 3 to the upper part by the pin 30 so as to be rotatable. Indicates connection pipes constituting the cushion frame 2.
[0020]
As shown in FIG. 4, the lock gear 6 engaging with the sector gear 4 engages with the tilt-up gear 41, and a locking portion 61 whose one end 6 </ b> A abuts the chip-up lock portion 40, and a side surface of the other end 6 </ b> B. The locking portion 61 is urged in the direction of the sector gear 4 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 described above are inserted into the elongated holes 52 provided on the operation lever 5 as shown in FIGS.
[0022]
As shown in FIG. 2, the operation portion 5A of the operation lever 5 is disposed such that one end is located 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 moved. An operating portion 5A is pivotally attached to the inner surface of the cushion frame 2 by a pivot pin 50 so as to be rotatable in a vertical direction so as to abut against a support plate of the cushion frame 2.
[0023]
As shown in FIG. 4, the connection link 3 described above is attached to the pin 30 at the upper end of the fixing piece 32 outside the sector gear 4 in the cushion frame 2 as shown in FIG.
[0024]
In FIGS. 3 and 4, reference numeral 20A denotes a through hole for inserting the hinge 20, and 31A denotes an insertion hole of the pin 31.
[0025]
As described above, since the tip-up mechanism is configured, when the operating portion 5A of the operating lever 5 is pulled upward against the elasticity of the spring 71, the guide pins 62 and 63 joined to the operating lever 5 are pushed down. As a result, the lock gear 6 having the pins 62 and 63 integrally rotates about the pin 60 and the one end portion 6A rotates upward, that is, in a direction in which the lock gear 6 separates from the sector gear 4, so that the tilt-up gear 41 The engaging portion 61 to be engaged comes off the tilt-up gear 41.
[0026]
Accordingly, the seat cushion 2 is flipped up around the hinge pin 20 as shown by the chain line in FIG. Then, in this state, the locking portion 61 hits the tip-up lock portion 40 and is locked.
[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, and there is no need to reinforce each member. Therefore, the weight can be reduced.
[0028]
According to the second aspect of the present invention, since the reinforcing member, the cushion frame, and the sector gear are integrally formed, the rigidity of the cushion frame and the like is further improved, and deformation of the cushion frame and the like can be prevented.
[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]
DESCRIPTION OF SYMBOLS 1 Base frame 2 Cushion frame 3 Connecting link 4 Sector gear 5 Operation lever 6 Lock gear

Claims (2)

A pair of left and right base frames fixed directly to the vehicle floor side or via slide rails,
A cushion frame that pivots freely inside the left and right base frames,
A connection link connected between the cushion frame and the base frame,
A sector gear integrally provided on the inner surface of the one cushion frame,
A lock gear that is provided on the inner surface of the cushion frame, engages with the sector gear, and releases the engaged state with the sector gear by an operation force of an operation lever;
A vehicle seat with a tip-up mechanism having: A reinforcing member is installed between the left and right cushion frames, the reinforcing member is inserted into one of the cushion frames and the sector gear and welded, and a fixing piece is welded to a portion of the reinforcing member protruding outside from the cushion frame, 2. The vehicle seat with a tip-up mechanism according to claim 1, wherein an upper end of the connecting link is pivotally attached to a fixing piece so as to be rotatable.

Images