JPS6025962B2 - seat hinge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hinge for a seat, and more particularly to a hinge used for a seat of a passenger vehicle.

This type of dual-purpose vehicle is used, for example, by folding the back seat of the rear seat to the front and using the rear part of the vehicle as a luggage compartment, or by converting it into a sofa classroom. Since the hinge has a single hinge point, either the front or rear hinge cannot be completely tilted and has the disadvantage that it cannot be leveled. The present invention has been made in view of the above-mentioned drawbacks with the purpose of eliminating this problem.When the back seat of the seat is folded forward, it becomes completely parallel to the floor surface, and when the back seat is folded back, the cushion surface and the back surface are completely parallel to each other. The purpose of the present invention is to provide a hinge for a seat that forms a single plane without any difference in level.

That is, in the present invention, special hinges with different heights are selectively used in conjunction with lever operation for the anterior and posterior spinal cords of the backsheet, and the mechanism prevents the nuclear backsheet from being raised. Thus, the seat hinge is configured to engage in the upright position.

An embodiment of the present invention will be described below with reference to the drawings.

1 is a lower arm attached to the rear end of the cushion seat frame of the seat; 2 is an upper arm attached to the lower end of the back seat frame; the lower arm 1 and the upper arm 2 are connected to both ends of the center arm 3, and each has a lower hinge 4; and are attached to each other through an upper hinge 5 so as to be swingable.

Further, 6 is a lower stopper, and 7 is an upper stopper, and the middle part of the lower stopper 6 and one end of the upper stopper 7 are pivotally connected to the middle part of the center arm 3 via a pin 8, respectively. At the same time, a return spring 9 made of a tension coil spring is attached between the upper end 6a of the earth stopper 6 and the active end 7a of the upper stopper 7, and elastically urges the lower stopper 6 and upper stopper 7 in the directions of arrows P and Q, respectively. It consists of Between one side of the upper end 6a of the lower stopper 6 and a contact portion 7b fixed to the swinging end 7a of the upper stopper 7, one end is attached to a pivot 10 which is attached to the center of the upper arm 2 so as to be freely spreadable. The operating end 11a of the installed spring member 11 is inserted, and the upper arm 2
A base portion 12a of an operating lever 12 is pivotally attached to the end of the pivot shaft 10 projecting outward, and the pivot member 11 swings about the pivot shaft 10 by the swinging motion of the operating bar 12. The angle of the lower hinge 4 is regulated by a circumferential part la formed at the base of the lower arm 1 and having the lower hinge 4 as its center, a twill part lb formed at the front and rear ends of the circumferential part la, and a contact step part lc formed at the front and rear ends of the circumferential part la. The side green 13a of the abutting member 13 interposed on the arm 3 comes into contact at the limit angle position when closing or opening.

Further, a locking end 6b formed at the operating end of the lower stopper 6 engages with the rear step portion lc at the closing angle limit position, so that the angle A of the center arm 3 with respect to the lower arm is locked at a constant level. becomes. Next, the angle of the upper hinge 5 is such that an engaging protrusion 7c formed inside the swinging end 7a of the upper stopper 7 is adjacent to one end of the sliding part 2a formed around the upper hinge 5 at the base of the upper arm 2. An engaging recess 2b is formed in which the mating protrusion 7c is inserted into the engaging recess 2b, and the angle B of the upper hinge 5 is held at 2 right angles, and the upper arm 2 in a straight line.

Further, the engagement recess 2c protrudes outward, and the engagement protrusion 7c
When the upper arm 2 is disengaged from the engagement recess 2b, the upper arm 2 will not fall backward. In addition, 14 in the figure is a left and right connecting rod, and a general saddle part 1 is molded at the inner end of the pivot shaft 10 which is integrated with the operating lever 12 in the iron joint hole 14a molded at both ends.
0a is prevented from rotating, and the two pivot shafts 10 of the left and right hinge mechanisms are connected. In this case, the operating lever 12 of one of the hinge mechanisms can be omitted.

In the seat hinge constructed as described above, the lower arm 1 is attached to the frame of the cushion seat a, and the upper arm 2 is attached to the frame of the back seat b to form a hinge mechanism.The functions and effects will be described below with reference to Figs. 3 to 5. .

In the normal position of a hawk (Figure 3), the center arm 3 is locked with respect to the lower arm 1 at the forward track (angle A) position, and the upper arm 2 extends linearly with respect to the center arm 3 (angle B). This allows the back seat b to be locked at an appropriate sitting angle with respect to the cushion seat a.

To shift from the normal position (FIG. 3) to the forward folded position (FIG. 4), the back seat b is pushed down forward while tilting the operating lever 12 in the forward direction.

That is, when the operating lever 12 is moved forward, the working end 11a of the lever member 11 moves rearward via the pivot 10, presses the abutting member 7b/ of the upper stopper 7 in the direction opposite to the arrow Q, and engages. The protrusion 7c is in the engagement recess 2b of the upper arm 2.
At this time, when the back seat b is pushed forward, the upper arm 2 is released around the upper hinge 5.
is locked in the front, and the front surface of cushion seat a is in contact with the top surface of cushion seat a.
The rear surface of the backsheet b is completely parallel to the floor surface. Next, the back seat b can be pulled up to the locking position and returned to its normal position (Fig. 3).
The engaging protrusion 7c slides on the sliding portion 2a, returns to the engaging recess 2b, and is refilled by the elasticity of the spring 9, transferring the rearward load of the back seat b to the upper stopper 7.
and supported by the lower stopper 6. Further, when changing from the normal position (FIG. 3) to the rear position (FIG. 5), the back seat b is pushed rearward while swinging the operating lever 12 in the rear direction.

When the bar 12 is operated to swing in the backward direction, the working end 11a of the screw member 11 moves forward via the pivot 10, and presses the upper end 6a of the lower stopper 6 in the direction opposite to the arrow P. 6 rotates around the pin 8 and the locking end 6
b is detached from the abutting stepped portion lc of the lower arm 1, and the rear end is allowed to move, and the end green 13b of the abutting member 13 is pushed back to the position where it abuts the corresponding reinforcing portion lc, and the front surface of the back seat b and the cushion seat are The upper surface of a becomes flat. Next, to return it to its normal position (Fig. 3), the back seat b is pulled up to the stop position, and the locking end 6b of the lower stopper 6 is constantly pressed against the base of the lower arm 1 by the elasticity of the return spring 9. When the center arm 3 is pulled up to the closing limit position and the side green 13a of the saddle member 13 abuts against the abutting twill portion lb, the locking end 6b falls into the abutting stepped portion lc. Center arm 13 to lower arm 1
It will once again be held at a fixed angular position.
As explained above, the seat hinge of the present invention has a height relative to the front neck or rear sardine when the back seat of the seat is used as a luggage compartment or a sofa bed room. Since special hinges with different angles can be rotated selectively, the back or front of the back seat can be made completely flat with the floor when sitting, and the front of the back seat and the top surface of the cushion seat can be made completely flat when sitting on the floor. It has the feature that it can be completely coplanar.

Furthermore, since the seat hinge of the present invention has a simple structure,
The practical effects of the present invention are extremely large, as there is no need for such operations, and the device is robust and highly safe.

[Brief explanation of the drawing]

The drawing shows one embodiment of the seat hinge of the present invention.
The figure is a rear perspective view of the seat hinge, Figures 2a, 2b and 2c are schematic side views of the seat showing the normal, front and rear positions of the backseat, respectively. 4 and 5 are explanatory diagrams of the operation of the hinge corresponding to FIGS. 2a, 2b, and 2c, respectively. 1...Lower arm, 2...Upper arm, 3...Center arm, 4...Lower hinge, 5"""hot/hinge, 6"""lower stock/guchi, 7...upper stock/guchi, 8 ...Pin, 9...Return spring,
10... Pivot, 11... Hammer member, 12
......operation lever, 13...this twill member,
a"""cushion sheet, b"""/suction sheet. Ta 2 4 pu 4 ko 3 4 4 sardine crab

Claims (1)

[Claims] 1. At the hinge that pivotally connects the back seat to the cushion seat of the seat so that it can be folded back and forth, the lower arm fixed to the rear end of the cushion seat side frame and the upper arm fixed to the lower end of the back seat side frame are connected to an appropriate length. a lower hinge connected via a center arm, pivotally connected to a lower arm at both ends of the center arm, and capable of freely rotating the center arm in a range from an upright position to a substantially horizontally reclined position;
An upper hinge is pivotally connected to the upper arm and allows the upper arm to rotate freely in a range from the upright position to a substantially horizontally forward position when the center arm is in an upright position, and a locking end of the center arm is engaged with the lower arm. a lower stopper that holds the center arm in an upright position and releases the engagement so that the center arm can be tilted back around the lower hinge; Upper stoppers that lock the center arm in the extending direction and disengage the upper arm so that the upper arm can be folded forward about the upper hinge are pivotally connected to each other, and each of the stoppers is respectively engaged. The lower stopper and the upper stopper are elastically biased in the direction in which the toe engages, and the lower stopper and the upper stopper are respectively moved in both swinging directions of the swinging end of the lever member, which has one end pivoted to the pivot of the operating lever pivoted to the upper arm. When the operating lever is tilted forward or backward, the lower stopper or upper stopper is selectively swung in the release direction via the lever member, and the lower hinge or upper hinge is made rotatable to horizontally level the back seat. A seat hinge that can be folded back or forward.