Folding type chair

Abstract

To provide a folding type chair that eliminates the need for a conventional perpendicular armrest support frame, is light-weight and compact, and excellent in portability, and facilitates installation and storage with a simple configuration.SOLUTION: A folding type chair eliminates the need for a perpendicularly extending armrest support frame by connecting a seating face support frame via a rotary joint to forward drawing parts of a pair of left and right rear leg frames, and rotatably connecting an armrest frame to a forward upper end part of the rear leg frame so as to enable expanding / folding of the seating face support frame and the armrest frame.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This invention relates to a folding chair comprising a pair of left and right front leg frames, a pair of left and right rear leg frames, a pair of left and right seat support frames supporting both sides of the seat, a pair of left and right armrest frames, and a single cloth seat. [Background technology]

[0002] Conventionally, chairs used for camping and the like have been proposed as foldable chairs with a seat made of a single cloth sheet for ease of transportation and storage, and chairs equipped with armrests for comfort during use have also been proposed (Patent Documents 1 and 2).

[0003] However, providing armrests to a folding chair increases the number of parts, complicates the folding structure, and makes it difficult to set up and store, as well as increasing the weight and making it inconvenient to carry and store. For example, even in the folding chairs shown in Patent Documents 1 and 2, an armrest support frame is required to support the armrest. Such an armrest support frame has a structure that extends almost vertically, with its upper end connected to the tip of the armrest, its lower end connected to the front leg frame, and its middle connected to the seat support frame, and further has a structure that expands and contracts when folded or has a rotating joint, so the connection structure between the armrest, the front leg frame, and the seat support frame becomes complicated, making the folding operation complicated. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3788455 [Patent Document 2] Patent No. 6163332 Summary of the Invention [Problem to be solved by the invention]

[0005] To provide a folding chair which does not require a conventional vertical armrest support frame, is lightweight, compact, and easy to carry, has a simple structure, and is easy to set up and store. [Means for solving the problem]

[0006] The measures taken by the inventors to solve the above problems were to connect the seat support frame to the forward extensions of a pair of left and right rear leg frames via a rotating joint, and to rotatably connect the armrest frame to the front upper end of the rear leg frames, thereby enabling the seat support frame and armrest frame to be unfolded and folded, eliminating the need for a vertically extending armrest support frame, simplifying the structure, facilitating the folding operation, and making it easy to store or set up.

[0007] In other words, the present invention comprises a pair of left and right front leg frames extending at an angle from the lower front to the upper rear and supporting the left and right sides of the backrest at their upper parts, a pair of left and right rear leg frames rotatably connected to approximately the center of the front leg frames and extending at an angle from the lower rear to the upper front, a seat support frame whose rear end is rotatably connected to approximately the center of the front leg frames and whose approximately center portion is rotatably connected to the tip extension of the rear leg frame by a rotary joint, and an armrest frame located above the seat support frame, whose rear end is rotatably connected to approximately the center of the front leg frame via a rotary link member and whose tip portion is rotatably connected to the tip portion of the rear leg frame, and the seat support frame and the armrest frame can be unfolded or folded by rotating the front leg frames and the rear leg frames. Effect of the Invention

[0008] According to the present invention, it is possible to provide a folding chair that has armrests, has a simple structure, can be easily folded, and is easy to store and set up.

[0009] In addition, by eliminating the need for an armrest support frame, it is possible to reduce costs by reducing the number of parts, make the chair lighter and more compact, reduce the number of connecting movable parts, and increase rigidity. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing the frame structure of a folding chair, in which (a) is shown in a set-up state, (b) is shown in the middle of being set up or folded, and (c) is shown in a folded and stored state. [Diagram 2] 1A, 1B, and 1C are external views of a folding chair, where (a) is a front view, (b) is a side view, and (c) is a rear view. [Diagram 3] 5A and 5B are diagrams showing a rotating link member connecting the front leg frame and the armrest frame, in which (a) shows the set-up state and (b) shows the folded-up state. [Figure 4] An external perspective view showing the framework of the folding chair DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The folding chair of the present invention will now be described with reference to the drawings.

[0012] As shown in Figures 1 and 4, the folding chair of the present invention comprises a pair of left and right front leg frames (1) extending at an angle from the lower front to the upper rear, with their upper parts (1a) supporting both sides of the backrest (7) of the seat (6), rear leg frames (2) each rotatably connected at approximately the center of the left and right front leg frames (1) in an X-shape, and a seat support frame (3) whose rear end is rotatably connected to approximately the center of the front leg frames and whose approximately center is rotatably connected to the tip extension of the rear leg frame (2).

[0013] The armrest frame (4) is rotatably connected at its rear end to the approximate center of the front leg frame (1) to which the seat support frame (3) is connected via a rotating link member (5) at a position above the seat support frame (3), and its tip is rotatably connected to the tip of the rear leg frame (2). An armrest of a desired shape and material can be attached to the upper surface of the armrest frame (4) as needed.

[0014] The front leg frame (1) and the seat support frame (3) are foldably connected by the front leg side X-shaped cross frame (8). The lower part of the rear leg frame (2) and the upper part of the front leg frame (1) are foldably connected by the rear leg side X-shaped cross frame (9), so that the chair can be folded as shown in Fig. 1(c). As the chair is folded, the upper end of the rear leg frame (2) rises and pushes the tip of the armrest frame (4) upward (Fig. 3a), and at the same time, the rear end of the armrest frame (4) rotates downward due to the rotation of the rotating link member (5), and the armrest frame (4) is folded (Fig. 3b).

[0015] The seat support frame (3) is connected at its approximate center to the upper part of the rear leg frame (2) by a rotary joint (10), and when the front leg frame (1) and the rear leg frame (2) are folded, the seat support frame (3) and the armrest frame (4) rotate upward and are folded. This folding action causes the rear end of the armrest frame (4) to rotate upward as shown in Figure 3(b) due to the downward rotation of the rotary link member (5) as described above, and is folded. [Explanation of symbols]

[0016] 1 Front landing gear frame 2 Rear leg frame 3 Seat support frame 4 Armrest frame 5 Rotating link member 6 Seat 7 Backrest 8. X-shaped cross frame on front leg side 9 Rear leg X-shaped cross frame 10 Rotational joint

Claims

1. A folding chair comprising: a pair of left and right front leg frames extending at an angle from the lower front to the upper rear and supporting the left and right sides of the backrest at their upper parts; a pair of left and right rear leg frames rotatably connected to approximately the center of the front leg frames and extending at an angle from the lower rear to the upper front; a seat support frame rotatably connected at approximately the center to the extension of the tip of the rear leg frames via a rotary joint; and an armrest frame rotatably connected at its tip to the tip of the rear leg frame above the seat support frame, wherein the seat support frame and the armrest frame can be unfolded or folded by rotating the front leg frames and the rear leg frames.

2. 2. A folding chair as described in claim 1, characterized in that the rear end of the seat support frame is rotatably connected to approximately the center of the front leg frame, and the approximately center portion is rotatably connected to the tip extension of the rear leg frame via a rotary joint.

3. 3. A folding chair according to claim 1 or 2, wherein a rear end of the armrest frame is rotatably connected to approximately the center of the front leg frame via a rotary link member.

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