FOLDABLE CHAIR FRAME

Abstract

The present invention is to a type of folding chair, wherein two front and rear support bars, the upper ends of which are hinged onto two diagonal bars; the front and rear support bars connect at the point of a slide housing, which results in the formation of an operational hinged structure. The two front support bars are constructed independently and are reinforced with a horizontal bar assembly on both sides that attaches near the slide housing hinged areas of the front support bars on the upper ends. This structure serves to reinforce the slide housing hinged area and when the two front support bars are fixed firmly to the floor, the chair will not tip over and the user will be able to sit more safely.

Claims

1. A foldable chair frame, including the following: Two symmetrical or corresponding front and rear support bars, the upper ends of which are hinged onto two diagonal bars; The aforementioned front support bar hinge has a slide housing; The aforementioned rear support bar passes through this slide housing, thereby creating an operational hinge utilizing both the front and rear support bars; A slide stop is fastened onto the upper portion of the rear support bar. When the chair is unfolded into the open position, the slide housing compresses against the slide stop; wherein the front support bars on both sides of the frame are independent bars; and Each front support bar is hinged with a slide housing on the upper ends, and the horizontal bar assembly is positioned to strengthen the support bars on both sides.

2. The foldable chair frame of claim 1, wherein: The horizontal bar assembly includes a short U-shaped bar and a curved section that connects to the two ends of the short U-shaped bar and is affixed firmly to the front support bars and is secured firmly to the structure with rivets; and The horizontal bar assembly also consists of the main horizontal bar and a protective sheath, with the vertical convex portion of the sheath being fitted with a bar casing; the protective sheath is positioned on the front support bars, and each end of the horizontal bars are inserted into the bar casings of the sheaths on each side, thus forming a connected structure.

3. The foldable chair frame of claim 2, wherein the two curved sections of the short U-shaped bars affix closely to the front or inner sides of the front support bars on both sides, and are riveted together.

4. The foldable chair frame of claim 1, wherein the rear support bars are constructed in the following manner by one single bar curved into a U-shaped bar.

5. The foldable chair frame of claim 1, wherein Independent bars are formed by soldering two ends of a single bar to the rear support bars, thereby connecting into an integrated structure.

6. The foldable chair frame of claim 1, wherein Independent bars are formed by riveting the two curved sections of the short U-shaped bars to the support bars, thereby connecting into an integrated structure.

7. The foldable chair frame of claim 1, wherein The diagonal bars are positioned at an angle of approximately 30-45 degrees; each of these diagonal bars are riveted onto the seat hoop, on which the seat fabric is attached.

8. The foldable chair frame of claim 7, wherein The chair hoop can either be a closed structure or an open structure that opens near the hinged areas of the diagonal bars

9. The foldable chair frame of claim 8, wherein the chair hoop is selected from one of the following shapes: circle, oval, rectangle, triangle, pentagon, hexagon, octagon, trapezoid, gourd, and oblong shapes.

10. The foldable chair frame of claim 1, wherein The diagonal bars are constructed in a wave form shape that starts low in the front and rises to the rear and The diagonal bars are riveted onto the chair hoop, with the wave-shaped portion serving an armrest.

11. The foldable chair frame of claim 10, wherein the front portion of the aforementioned chair hoop has an opening near the hinged areas of the diagonal bars, forming an open structure.

12. The foldable chair frame of claim 11, wherein The chair hoop can be constructed in a shape selected from one of the following shapes: circle, oval, rectangle, triangle, pentagon, hexagon, octagon, trapezoid, gourd, and oblong shapes.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG. 1 shows an existing folding round chair.

[0028] FIG. 2 provides a diagram of the folding chair frame according to at least one aspect of the present invention.

[0029] FIG. 3 provides a side-view of the folding chair frame.

[0030] FIG. 4 shows the folding chair frame fitted with a chair hoop.

[0031] FIG. 5 shows the folding chair frame with an open chair hoop.

[0032] FIG. 6 shows the folding chair with armrest functionality.

[0033] FIG. 7 shows a broken down folding chair frame with armrest functionality.

[0034] Similar reference characters denote corresponding features consistently throughout the attached drawings. Namely, in the drawings the following reference numbers refer to the following part: [0035] 1-chair hoop [0036] 2-fabric seat [0037] 3-front support bar [0038] 4-rear support bar [0039] 41-bar [0040] 5-slide housing [0041] 6-slide stop [0042] 7-diagonal bar [0043] 8-horizontal bar assembly [0044] 81-short U-shaped bar [0045] 811-curved section [0046] 82-horizontal bar [0047] 83-protective sheath [0048] 831-bar casing

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)

[0049] As shown in FIG. 2 and FIG. 4, the folding chair frame includes a pair of symmetrical or corresponding front support bars (3), rear support bars (4) and diagonal bars (7). The diagonal bars (7) are hinged onto the upper ends of the front and rear support bars (3 & 4). The hinged portion of the front support bar (3) has a slide housing (5), and the rear support bar (4) passes through this housing (5) forming an operational hinge structure composed of the front and rear support bars (3 & 4). A slide stop (6) is positioned atop the rear support bars (4). When the chair is unfolded in the open position, the slide housing (5) presses against the slide stop (6), forming a triangular support. Each of the two front support bars (3) are independent bars, with the bottom ends affixed to the ground, providing stability. On the slide housing hinged area of the bars, there is a diagonal bar assembly (8) positioned to provide extra reinforcement.

[0050] The horizontal bar assembly (8) is constructed in the following manner: [0051] 1. As shown in FIG. 2, the horizontal bar assembly includes a short U-shaped bar (81). Leveraging the curved section (811) of the two ends of the short U-shaped bar (81) allows it to stay close to the front support bars (3), and it is formed into a fixed structure by means of rivets. This allows the structure to have the best position and provides protection and strength to the slide housing hinged area. The horizontal bar assembly could also be riveted onto the inner sides of the front support bars (3) with similar results and it would also not take up as much space. [0052] 2. As shown in FIG. 5 and FIG. 7, the horizontal bar assembly (8) includes the horizontal bar (82) and the protective sheath (83). The vertical convex portion of the protective sheath (83) has a bar casing (831). The protective sheath (83) is positioned on the front support bars (3), and the two ends of the horizontal bar (82) are inserted into the bar casings (831) of the sheath on the both sides. The horizontal bar assembly thereby provides both a protective and reinforcing function in the hinged area where the protective sheath (83) and front support bars (3) are co-located.

[0053] The two rear support bars (4) are preferably constructed in the following manner: [0054] 1. As shown in FIG. 2, by one single bar curved into a U-shaped bar; [0055] 2. Independent bars that are formed by soldering two ends of a single bar (41) to the rear support bars (4), thereby connecting into an integrated structure; or [0056] 3. Independent bars that are formed by riveting the two curved sections of the short U-shaped bars to the support bars, thereby connecting into an integrated structure, similar to how the front support bar (3) is connected to the short U-shaped bar (81).

[0057] Additionally, the diagonal bars (7) may be constructed in a different manner, and the uses are different. One use is to support the chair hoop (1); the other use is to be riveted together with the chair hoop (1), which provides armrest functionality. Specifics are as follows:

Firstly, as per FIG. 3, the diagonal bars (7) are positioned at an angle of approximately 30-45 degrees; each of these diagonal bars (7) are riveted onto the seat hoop (1), onto which the seat fabric is attached, thereby creating the frame shown in FIG. 4.

[0058] Furthermore, the aforementioned chair hoop (1) can be a closed structure, as shown in FIG. 4, but can also be an open structure with the front portion having a break/opening near the hinged points of the diagonal bars, as shown in FIG. 5. With regard to the open option of the chair hoop (1), while there is the negative factor of requiring more fabric on the front portion, there is also the benefit having less pressure placed on the legs of the seated user.

[0059] The aforementioned chair hoop (1) can be constructed from a shape selected from the following shapes: circle, oval, rectangle, triangle, pentagon, hexagon, octagon, trapezoid, gourd, and oblong shapes.

[0060] Secondly, as shown in FIG. 6, the diagonal bars (7) are constructed in a wave form shape that starts low in the front and rises to the rear. The diagonal bars are then riveted onto the chair hoop (1) with the wave-shaped portion serving as an armrest, as shown in FIG. 7, thereby creating a chair frame with armrest functionality.

[0061] The chair hoop (1) breaks/opens near the hinged areas of the diagonal bars. The chair hoop can be constructed from a shape selected from the following shapes: circle, oval, rectangle, triangle, pentagon, hexagon, octagon, trapezoid, and gourd, and oblong shapes.

[0062] A summary of the aspects of this invention is as follows: A type of folding chair composed of two front support bars formed independently, which are connected to a horizontal bar assembly to support the hinged areas of the front and rear support bars and provide protection to the front support bars, and also provide support to the chair as both front support bars are fixed to the ground. This chair can also accommodate a variety of rear support bar structures, as well as seat shapes, to provide different options for the overall folding chair structure.