JPH09378A - Seat device - Google Patents

Abstract

PURPOSE: To obtain a seat device capable of being revolved by a predetermined angle by a compact link mechanism when a footrest is revolved in connection with reclining operation. CONSTITUTION: The second link related to a first link is rotated by the movement of the roller moving on the guide bracket attached to a leg frame 5 upwardly corresponding to the oblique upward moving operation of a cushion frame 2 at a time of reclining operation to revolve the footrest 3 attached to the first link in a freely revolvable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat device suitable for use in chairs such as vehicles and furniture, and more particularly to a seat device in which a seat back, a seat cushion and a footrest are interlocked by a compact mechanism.

[0002]

2. Description of the Related Art Conventionally, the reclining mechanism of a seat device and the folding mechanism of a footrest are interlocked with each other, and when the back frame is tilted obliquely by the reclining mechanism, the footrest is closed to the open state (the folded state is moved upward). Various link mechanisms have been proposed that are configured to perform an interlocking operation depending on the state.

As a seat device in which the reclining mechanism and the footrest mechanism as described above are interlocked, for example, one disclosed in Japanese Utility Model Laid-Open No. 4-3049 is proposed. In this conventional seat device, as shown in FIG. 11, a seat 120 tiltably arranged on a seat frame 110 and a lower end of a support plate 121 constituting the seat 120 are rotatably connected to a rear end thereof. 1 is a reclining seat 100 including a seat back 130 and a support plate 1 that constitutes the seat 120 on a support frame 112 fixedly arranged on both sides of the seat 120 on the seat frame 110.
21 and a supporting plate 1 integrally provided on a seat back frame 131 of a seat back 130 and a hanging plate 122.
32 is rotatably connected, and the long hole 125 formed in the front end side of the support plate 121 on the seat 120 side and the lower end of the seat back frame 131 of the seat back 130 are connected by a link arm 134, so that the seat back. The front end of the seat 120 is moved up and down via a link arm 134 according to the tilting of the seat 130. The front end of the seat 120 is provided with a regression (footrest) 140 that is expanded or folded by a drive device 136. There is. This regress (footrest) 140
Is operated by a drive device 136 different from the drive device 35 for driving the reclining seat, but conventionally, there is also proposed one in which this footrest is linked with a reclining mechanism. Further, the inclination angle of the seat back that is normally reclined is 0 to 40 degrees, and the footrest angle from the folded closed state of the footrest to the open state of moving upward to the horizontal state is 0 to 90 degrees to 120 degrees. Is the range.

[0004]

When considering the interlocking of the reclining mechanism and the footrest mechanism as the seat device as described above, the footrest angle is 0 to 90 to 12 with respect to the reclining angle range of 0 to 40 degrees.
Since the link mechanism needs to have an extremely complicated mechanism because it requires an amplification that is approximately three times as high as 0 degree, the conventional seat apparatus has a complicated mechanism.

On the other hand, there is a problem in that the operability deteriorates when the mechanisms are compactly arranged, and the compact mechanism cannot be achieved when the operability is improved. Particularly, in the conventional footrest mechanism, when the user sits down and operates the foot, the foot is separated from the floor and the weight of the foot is added, so that the foot may not come up to the end. Further, conventionally, the ON-OFF type cannot be locked in the middle, or the gas spring is used for locking, but there is a disadvantage in that it is not easy to use due to a different extension speed.

The present invention is intended to provide a seat device which solves the above problems, and its object is to provide a reclining and a footrest to each other with a very compact mechanism using only two link mechanisms. It is intended to obtain a seat device that can be rotated within a predetermined angle range.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a back frame which is pivotally attached to an arm frame behind a cushion frame and is capable of reclining, and is rotatable forward of the cushion frame. It is pivotally attached to the footrest that can be opened and closed in a predetermined angle range in conjunction with the reclining operation, the leg frame that holds the arm frame to the left and right, and the bracket that is installed at the left and right symmetrical positions of the bottom of the cushion frame. The pivotally mounted roller, a guide bracket for guiding the roller fixed to the leg frame, a foot bracket having a long hole attached to the lower end of the footrest, and a first link interposed between the leg frame and the first link. A second link pivotally mounted between the link and the cushion frame, a leg frame and a cushion Characterized by comprising; and a biasing means which is stretched between frames.

[0008]

In the seat apparatus of the present invention, when the back frame is reclined and tilted backward, the roller rotatably attached to the lower side of the cushion frame moves on the guide bracket fixed to the leg frame, and the seat frame is fixed to the cushion frame. The second link attached to the pivotally mounted cushion bracket moves, the first link also rotates, and the footrest pivotally attached to one end of the first link also moves upward, so that the footrest is horizontal. It is brought to the open position and locked. Therefore, the reclining and the footrest can be operated in conjunction with each other by a predetermined angle with an extremely simple link mechanism.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the structure of a seat device according to the present invention will be described in detail below with reference to FIGS. FIG. 1 is a front view of the seat apparatus of this example, FIG. 2 is a side view, and FIG. 3 is a side view of the seat apparatus in an operating state.

1 to 3, in the seat device, a cushion seat portion is constituted by a trim cover and the like on a cushion frame 2 having a substantially rectangular shape via a pad support wire and a seat pad, and is further formed in a substantially rectangular shape. A backseat portion is constituted by a trim cover or the like on a back frame 1 in which several seat springs are bridged to the above frame body through a seat pad.

Similarly, the footrest frame 3 pivotally mounted at a point C in front of the cushion frame 2 is formed in a substantially rectangular shape and is covered with a seat pad, a trim cover and the like.

An arm frame 4 which is bent in a substantially inverted U shape on the left and right side surfaces of the cushion frame 2 as shown in FIG.
Are arranged. The open end of the arm frame 4 is fixed to a substantially rectangular leg frame 5 which is inclined upward and downward by a predetermined angle in the left-right and front-rear directions. The pole of the round frame 6 in which the pole is planted is rotatably fitted.

The side (lower end) of the back frame 1 opposite to the headrest side is rotatably and pivotally attached to the cushion frame 2 at a fulcrum B (see FIG. 3), and the back frame 1 is rotated when tilted during reclining. The fulcrum is a fulcrum A (see FIG. 3) of the left and right arm frames 4.

Further, as shown in FIG. 1, a mechanical lock mechanism 7 is arranged on the right side as viewed from the front, and a link mechanism for operating a footrest in conjunction with a back frame 1 at the time of reclining which will be described later is arranged on the left side. . These arrangement positions may be symmetrically arranged, but the arrangement relationship between the lock mechanism and the link mechanism may be left-right opposite to the above.

The mechanical lock mechanism 7 described above has a fulcrum D shown in FIG. 3 via the bracket of the cushion frame 2.
It is pivotally pivoted at a point and the other end is pivotally pivoted between leg brackets fixed to the leg frame 5.

The operation of the mechanical lock mechanism 7 is performed by a lever 9 attached to the arm frame 4 using a cable 10.

Next, the structure of the link mechanism arranged on the left side of FIG. 1 is shown in FIG.
It will be described in detail with reference to FIG.

FIG. 4 is an explanatory view of the main part of the footrest frame 3 in a closed state, FIGS. 5 to 8 are explanatory views of the pivot structure of the link of FIG. 4, and FIG. 9 is an explanatory view of the main part when the footrest frame 3 is opened. FIG. 10 is an explanatory view of the roller portion.

First, the link mechanism of this embodiment will be described with reference to the drawings. One end of the first U-shaped link 14 is fixed to the leg frame 5 by welding or the like as shown in FIGS. 7 and 9. The leg bracket 19 made of the rectangular plate material is pivotally attached to the tip of the leg bracket 19 around the pin 20.
In FIG. 7, 21 indicates a hat nut.

The other end of the first link 14 is slidably attached to an elongated hole formed in a foot bracket 15 fixed to the lower end of the footrest frame 3. That is, as shown in the pivot portion in FIG.
The other end of the link 14 is disposed, the roller 17 is disposed between the elongated holes formed in the foot bracket 15, and the rivet 23 is inserted into the roller 17 and the first link 14 via the washer 22 to insert the foot bracket. A roller 17 pivotally attached to the other end of the first link 14 along an elongated hole 15 is fixed by a hat nut 21.

The second link 13 is a curved J-shaped plate material, one end of which is shown in a bearing portion of FIG. 5 on a cushion bracket 12 made of a substantially J-shaped plate material and attached to the cushion frame 2. So that it can pivot freely. That is, the pin 20 erected at one end of the second link 13
Is rotatably attached to the cushion bracket 12 with a hat nut 21 via a washer 22.

Further, the other end of the second link 13 is rotatably attached to the pivot F (see FIG. 9) side of the first link 14. That is, as shown in the side sectional view of the pivot portion shown in FIG.
To the pin 20 that is erected near the pivot F of the link 14 of
The washer 2 by inserting it through the through hole formed at the other end of the link 13
It is rotatably and pivotally attached by a hat nut 21 through 2.

Further, a coil spring 18 is stretched between the cushion frame 2 and the first link 14, and when the unreclined footrest frame 3 shown in FIG. 4 is also folded, the first link 14 is centered on the pivot axis F. When the footrest frame 3 is moved upward and horizontally opened, a biasing force is applied to rotate the arm in a counterclockwise direction, and reclining is performed as shown in FIG. A biasing force that rotates is applied.

A roller bracket 8 is provided on the front portion of the cushion frame 2 so as to project downward, and a roller 16 is rotatably attached to the roller bracket 8. A guide bracket 11 is attached to the leg frame 5 along the inclination of the leg frame 5, and the roller 16 is guided and moved on the guide bracket 11.

The operation of the seat device configured as described above will be described below. First, when reclining, the lever 9 is operated to set the mechanical lock mechanism 7 in a free state, and when the back frame 1 is tilted backward, the cushion frame 2 is lifted from the state shown in FIG. 4 to the rear as shown in FIG. The roller 16 pivotally attached to the tip of the roller bracket 8 fixed to the cushion frame 2 moves diagonally forward along the guide bracket 11 in order to move forward. At this time, since the guide bracket 11 is attached along the leg frame 5 inclined upward, the operating range (opening / closing angle) of the footrest frame 3 can be increased.

Next, since the cushion bracket 12 moves forward as the cushion frame 2 moves forward, the second link 13 rotatably attached to the cushion bracket 12 also moves. When the second link 13 moves, the first link 14 is moved as shown in FIG.
Rotates clockwise about the axis F.

By rotating the first link 14 in the clockwise direction, the roller 17 pivotally attached to the other end of the first link 14 described in FIG. The rollers 17 are moved and brought to the opposite position, and as a result, the footrest frame rotates about the pivot axis C and rotates from the 90-degree position to the approximately 120-degree position so that the footrest frame is horizontal as shown in FIG. It becomes open to the public.

In this state, the mechanical lock mechanism 7 is brought into the locked state to hold the locked position. The mechanical lock mechanism 7 of this example can be locked at any position by releasing the lever 9, so that the mechanical lock mechanism 7 can be locked at a position according to the reclining tilt angle.

Since the present invention is constructed and operated as described above, the reclining inclination angle range of 0 ° to 40 ° is provided by the two extremely simple link mechanisms, and the angle range of the footrest frame is changed from 0 °. A simple and inexpensive interlocking mechanism that can be opened and closed within the range of 90 to 120 degrees can be configured.

Further, by using the rollers 16 and 17 for each slide portion, the operation can be smoothly performed, and the rollers are attached at two positions on the right and left when viewed from the front of the cushion frame, so that rattling can be prevented.

Further, by attaching a coil spring, the biasing force of the spring acts in the feeding direction in both the folded (closed) state and the extended (opened) state of the footrest frame to suppress rattling and maintain the shape. When activated, the coil spring can also serve as an extension of the footrest frame.

[0032]

According to the seat device of the present invention, a compact structure can be achieved by two link mechanisms, and the footrest frame can be rotated by a predetermined angle in conjunction with reclining. Also, since the guide bracket is attached to the leg frame and is attached so as to be inclined, the cushion frame moves diagonally upward during reclining, which enables movement of the footrest frame in all steps.

Particularly, in the past, a complicated link mechanism was required, but according to the present invention, a combination of two links is sufficient, so that it can be installed in a small space, the appearance is good, and the degree of freedom in design is high. And the cost can be further reduced.

In addition, in the conventional footrest mechanism, when the user sits down and operates, the foot is separated from the floor and the weight of the foot is added, so that the foot may not be lifted to the end. By moving it upward, the footrest can be surely raised, and by using the roller, smooth operation can be obtained and operability is excellent. Moreover, since the present invention uses the mechanical lock, there is an effect that it can be completely and freely locked steplessly.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a seat device of the present invention.

FIG. 2 is a side view showing an embodiment of the seat device of the present invention.

FIG. 3 is a side view showing a reclining state showing an embodiment of the seat device of the present invention.

FIG. 4 is an enlarged view of a main part of the link mechanism of the present invention when not reclining.

5 is a side sectional view of a pivot bracket of the cushion bracket and the second link of FIG. 4. FIG.

FIG. 6 is a side sectional view of a pivot portion of the second link and the first link of FIG.

FIG. 7 is a side sectional view of a pivot portion of the first link and leg bracket of FIG.

8 is a side cross-sectional view of a pivotal portion of the first link and foot bracket of FIG.

FIG. 9 is an enlarged view of a main part of the link mechanism of the present invention when reclining.

10 is a side sectional view showing a relationship between a roller pivotally attached to the roller bracket of FIG. 4 and a guide bracket.

FIG. 11 is a side view of a conventional seat device.

[Explanation of symbols]

 1 Back Frame 2 Cushion Frame 3 Footrest Frame 4 Arm Frame 5 Leg Frame 7 Mechanical Lock Mechanism 13 Second Link 14 First Link

Claims (2)

[Claims] 1. A back frame pivotably attached to an arm frame rearward of the cushion frame so as to be reclining, and a back frame pivotably pivoted forward of the cushion frame to interlock with the reclining operation. A footrest that can be opened and closed by a predetermined angle range, a leg frame that holds the arm frame to the left and right, and a roller that is pivotally attached to a bracket provided at a symmetrical position on the bottom of the cushion frame. A guide bracket for guiding the roller fixed to the leg frame, a foot bracket having a long hole attached to the lower end of the foot left, and a first link interposed between the leg frame, the first link and the above A second link pivotally mounted between the cushion frames, the first link and the clip. Seat device comprising a biasing means stretched between traction frames 2. The guide bracket fixed to the leg frame is tilted at a predetermined angle to be attached, and the roller is slid along the guide bracket in a diagonally upward movement when the cushion frame is reclined. 1. The seat device according to 1.