KR20020032238A - Hinge for use in a double folding seat having a self locking set - Google Patents

Abstract

PURPOSE: Structure of a self-lock type hinge of a double-folding seat is provided to make operation convenient and to improve appearance by automatically locking a hinge when a seat is folded and unlocking the hinge via a wire. CONSTITUTION: A fixing unit(32) has a through hole(32a) and a stopper(46). A rotating unit(30) has a fixing hole(30a) aligned straight to the through hole. A lock pin(34) is connected with a wire(40) and selectively inserted to the through hole and the fixing hole. A housing(44) is attached to one end of the fixing unit while covering the lock pin. A spring(38) pressurizes the lock pin between a flange(34a) of the lock pin and the inner wall of the housing. If a seat cushion is lifted up, the rotating unit becomes rotatable. If the wire is pulled to lift down the seat cushion, the lock pin is released from the fixing hole and the rotating unit returns to its original position.

Description

Self-locking type hinge structure of double folding seat {HINGE FOR USE IN A DOUBLE FOLDING SEAT HAVING A SELF LOCKING SET}

The present invention relates to a self-locking hinge structure of a double folding sheet, and more particularly, to lock automatically when the sheet is folded to prevent the folded sheet from falling and to pull the wire to use the sheet. By having a self-lock structure in which the state is released, it relates to a self-locking type hinge structure of a double folding sheet which can increase the locking force, simplify the operation, and improve the appearance compared to the hook band.

In general, a vehicle is provided with a front seat and a rear seat, and a multi-row vehicle such as an RV vehicle is provided with more rows of seats. These seats consist of a seat cushion, which is a part where the occupant sits, and a seat back, which is a part of which the back is leaned. In some cases, a headrest that can rest against the head and rest above the seat back is provided to be pulled upward. In particular, in the case of RV vehicles, in order to increase the utilization of the leisure space and to secure a loading space, a large number of double folding seats that can be temporarily moved in a folded state are employed.

1 and 2 illustrate a process of folding a conventional double folding sheet in turn. The front end of the double folding seat is foldable by a lower bracket 4 and an upper bracket 8 attached to the floor 2 and a pivot pin 6 rotatably connecting these brackets 4 and 8. It is supported, and the other end is provided with a right latch 10 to prevent the flow of the sheet during use.

In the double folding sheet having such a structure, when the sheet is folded to secure space, first, the seat back 14 is folded and placed on the seat cushion as shown in FIG. Next, the lever 18 is operated to release the latch 10 held in the striker, and then the seat cushion 12 together with the seat back 14 is lifted up as shown in FIG. 2. Accordingly, the seat cushion 12 is rotated by the pivot pin 6 while being disposed side by side perpendicular to the rear of the front seat back. Next, by fixing with a hook band provided on the front sheet, the folded sheet is prevented from coming off.

In the conventional double folding sheet having such a configuration, the use of the hook band for fixing the sheet is inconvenient and the appearance is poor because it is exposed to the outside. In addition, because of the band type, the locked state is released by vibration or shock transmitted from the road surface while driving, and the folded seat is lowered, which may damage the loaded cargo.

The present invention to solve this problem is automatically locked when folding the sheet to prevent the folded sheet to come down and at the same time double folding with a self-lock structure that the locking state is released by pulling the wire to use the sheet The purpose is to provide a self-locking type hinge structure for the seat.

1 and 2 are side views showing a folding process of a conventional double folding sheet,

3 is a side view showing a seat cushion to which a self-locking hinge structure according to the present invention is applied;

4 is an enlarged view of a portion A of FIG. 3;

Fig. 5 is a cross sectional view showing the self-locking hinge portion shown in Fig. 3.

<Description of the symbols for the main parts of the drawings>

2: floor 4: bottom bracket

6: Rotating Pin 8: Top Bracket

20: Bolt 30: Rotating part

30a: fixed hall 32: government

32a: Through hole 34: Lock pin

34a: Flange 36: Guide

38: Spring 40: Wire

42: connecting pin 44: housing

46: stopper

Self-locking hinge structure of the double folding sheet of the present invention for achieving the above object is a double folding sheet having a lower bracket attached to the floor, and an upper bracket rotatably coupled to the upper portion of the lower bracket via the pivot pin. In the present invention, there is provided a fixing part having a through hole and a stopper connected to the lower bracket, a rotating part having a fixing hole connected to the upper bracket and aligned with the through hole, and one end of which is connected to the wire and the other end of the through hole and the fixing part. A lock pin selectively inserted into and fixed to the hole, a housing attached to one end of the fixing portion with the lock pin wrapped therein, and a spring disposed in a state in which the lock pin is pressed between the flange of the lock pin and the inner wall surface of the housing; It is characterized by.

Hereinafter, a self-locking hinge structure of a double folding sheet according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5.

3 is a side view showing a seat cushion to which the self-locking hinge structure according to the present invention is applied, FIG. 4 is an enlarged view of a portion A of FIG. 3, and FIG. 5 is a cross-sectional view showing the self-locking hinge structure shown in FIG. 3. Parts identical to those of the conventional structure described with reference to FIGS. 1 and 2 are denoted by the same reference numerals.

First, FIG. 3 shows a seat cushion 12 of a double folding seat to which a self-locking hinge structure according to the present invention is applied. As shown, the front end of the seat cushion 12 is positioned on the upper portion of the lower bracket 4 via the lower bracket 4 and the pivot pin 6 attached to the floor 2 by bolts 20. It is rotatably supported by the arranged upper bracket 8. In the front end support structure, in the present invention, the upper bracket 8 is automatically fixed to the lower bracket 4 when the seat is folded, thereby restraining the seat cushion 12 from descending. And a self-locking hinge structure as shown in FIG.

In the hinge structure of the self-lock type according to the present invention, a fixing portion 32 connected to the lower bracket 4 attached to the floor 2 and having a through hole 32a and a stopper 46, and a seat cushion ( 12 is connected to the upper bracket (8) attached to the lower portion of the rotary part 30 having a fixing hole (30a) is aligned with the through hole (32a) of the lower bracket (4), and one end connecting pin 42 Lock pin 34 is fixed to the wire 40 is inserted into the fixing hole (30a) formed in the rotating part 30 in the state in which the wire 40 is fixed and the other end penetrates the through hole (32a) and The lock pin 34 is disposed between the housing 44 which is attached to one end of the fixing part 32 and surrounds the lock pin 34, and is arranged between the flange 34a of the lock pin 34 and the inner wall surface of the housing 44. It consists of a spring (38) for pressing.

Here, the rotation part 30 is maintained at the point indicated by the point P1 in FIG. 4 before the seat cushion 12 is folded, and moves to the point indicated by the point P2 when the seat cushion 12 is folded. Then, it is caught and stopped by the stopper 46, so that it is no longer rotated. The rotation pin 6 is fitted in the center part of the rotation part 30 and the fixing part 32. As shown in FIG.

Inside the fixing part 32, a guide part 34a for guiding the longitudinal movement of the lock pin 34 is formed. In addition to guiding the longitudinal direction of the lock pin 34, the guide portion 34a also serves to restrain the flange 34a of the lock pin 34 from being moved further inward.

The housing 44 is fixed to one side of the fixing part 32 by an appropriate method such as welding or screwing, thereby protecting the lock pin 34 and the spring 38.

In the hinge structure of this configuration, when the occupant lifts the seat cushion 12 to secure space, the rotating part 30 starts to rotate counterclockwise in FIG. At this time, since the lock pin 34 is not inserted into the fixing hole 30a of the rotating part 30 in the initial state, the rotating part 30 can be rotated.

At the moment when the rotating part 30 is moved from the position of the point P1 to the position of the point P2, the stopper 46 attached to the fixing part 32 is no longer rotated, and at the same time, The fixing hole 30a and the through hole 32a of the fixing part 32 are arranged in a straight line horizontally. As a result, the lock pin 34 pressed by the spring 38 is advanced, and the front end is inserted into the fixing hole 30a to restrain the rotation of the rotation part 30.

Next, when the wire 40 is pulled down to lower the seat cushion, the lock pin 34 inserted into the fixing hole 30a is pulled out, and the fixing state of the rotating part 30 is released, and the rotating part 30 is a rotating pin ( It is possible to return to the original position while rotating on the fixing portion 32 with respect to 6).

According to the present invention described above, the locking state of the lock pin is released when the wire is pulled to use the seat while being locked at the same time as it is automatically locked when the seat is folded, thus locking compared to the hook band. The force is increased, the operation is simple and the appearance can be improved.

Claims (2)

In a double folding seat having a lower bracket (4) attached to the floor (2) and an upper bracket (8) rotatably coupled to an upper portion of the lower bracket (4) via a pivot pin (6), A fixing part 32 connected to the lower bracket 4 and having a through hole 32a and a stopper 46; A rotating part 30 connected to the upper bracket 8 and having a fixing hole 30a aligned in line with the through hole 32a; One end of the wire 40 is connected and the other end of the lock pin 34 is selectively inserted and fixed to the through hole 32a and the fixing hole (30a), A housing 44 attached to one end of the fixing part 32 in a state in which the lock pin 34 is wrapped; And a spring (38) disposed between the flange (34a) of the lock pin (34) and the inner wall surface of the housing (44) in a state in which the lock pin (34) is pressed. Lock type hinge structure. The method of claim 1, Self locking type hinge structure of a double folding sheet, characterized in that the guide portion (34a) for guiding the longitudinal movement of the lock pin (34) is formed on one side of the fixing portion (32).