Portable chair stand and portable chair

Abstract

A portable chair support comprises at least three chair legs, each of which is detachably fixedly connected with each other; at least three chair surface support rods, the lower end of each of which is connected with the upper end of one chair leg; and a positioning member comprising a positioning part fixed on the upper end of the chair surface support rod and a limiting part arranged on the positioning part; a limiting cavity is formed between the limiting part and the positioning part. Compared with the prior art, the portable chair support can be used to support a more flexible and thinner chair surface, the edges and corners of the chair surface pass through the limiting cavity and are knotted to complete the installation and fixation, without the need of sewing or pasting a fixed connecting member on the chair surface, so that the chair surface can be more light and thin, the portability is improved, and the tension of the chair surface can be controlled by freely adjusting the position of the limiting knot.

Description

Technical Field

[0001] This utility model relates to the field of furniture, and in particular to a portable chair bracket and a portable chair. Background Technology

[0002] Portable chairs are foldable or detachable chairs. Due to their advantages such as small storage size and easy carrying, they are widely used in outdoor camping, beach leisure, sports events and other scenarios.

[0003] In existing technology, portable chairs typically include a detachable and easily assembled portable chair frame, and a seat detachably fixed to the portable chair frame. The seat is made of a flexible material, usually fabric, for easy folding and storage. The seat is usually connected to the portable chair frame by sewing or gluing a fixing connector at the corner of the seat, which is then snapped into place at the top of the portable chair frame to secure the seat. However, current portable chairs still have significant drawbacks: the seat requires thicker fabric, which results in a heavier overall weight for the folding chair and a larger folded storage volume, making them less lightweight and portable. Utility Model Content

[0004] Therefore, the purpose of this utility model is to overcome the defects or deficiencies of the prior art and provide a portable chair stand.

[0005] A portable chair support includes: at least three chair legs, which are detachably and fixedly connected to each other; at least three seat support rods, the lower end of each seat support rod being connected to the upper end of one chair leg; and a positioning member, which includes a positioning part fixed to the upper end of the seat support rod and a limiting part disposed on the positioning part; a limiting cavity can be formed between the limiting part and the positioning part.

[0006] Compared to existing technologies, the portable chair bracket described in this utility model can be used to support thinner, more flexible chair surfaces. The chair surface can be installed and fixed by passing the corners of the limiting cavity through the corners and tying a knot. There is no need to sew or paste fixing connectors on the chair surface, which makes the chair surface thinner and lighter, improving its portability. At the same time, the tension of the chair surface can be controlled by freely adjusting the position of the limiting knot.

[0007] In one embodiment, the limiting portion of the positioning member is fixed to the top surface of the positioning portion.

[0008] In one embodiment, the limiting portion of the positioning member is fixed to the side wall of the positioning portion.

[0009] In one embodiment, the top surface of the positioning portion is recessed downwards at the center.

[0010] In one embodiment, the limiting portion of the positioning member is adjustablely fixed to the positioning portion so that the size of the limiting cavity is adjustable.

[0011] In one embodiment, the limiting portion of the positioning member has a clamping protrusion on one side surface near the positioning portion, which can be used to reduce the space inside the limiting cavity.

[0012] In one embodiment, the positioning portion of the positioning member is detachably fixed to the upper end of the seat support rod; the limiting portion of the positioning member is detachably fixed to the positioning portion. The detachable positioning member facilitates the storage and carrying of the portable chair frame.

[0013] In one embodiment, the positioning portion of the positioning member is adjustablely fixed to the upper end of the seat support rod. The position of the positioning member is adjustable, facilitating adjustment of the seat tension, relaxation, and height.

[0014] In addition, the present invention also provides a portable chair, comprising:

[0015] As described above, a portable chair bracket and a seat detachably fixed to the portable chair bracket; the corner of the seat passes through the top surface of the positioning part of the positioning member and through the limiting cavity, and a limiting knot is formed at the free end of the seat that exits the limiting cavity, the limiting knot being unable to pass through the limiting cavity.

[0016] In one embodiment, the chair surface includes a polygonal body and corner extensions extending outward from the corners of the body; the retaining knot is formed at the corner extensions. The extension of the corner extensions makes it easier to form the retaining knot on the chair surface.

[0017] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the portable chair of this utility model;

[0019] Figure 2 This is a schematic diagram of the chair surface structure in one embodiment;

[0020] Figure 3 This is a schematic diagram of the limiting relationship between the positioning element and the chair surface in one embodiment;

[0021] Figure 4 This is a schematic diagram illustrating the fixing method between the positioning member and the seat support rod in one embodiment.

[0022] Figure 5 This is a schematic diagram of the chair surface structure in a modified embodiment;

[0023] Figure 6This is a schematic diagram illustrating the connection method between the positioning part and the limiting part in one embodiment;

[0024] Figure 7 This is a schematic diagram illustrating the connection method between the positioning part and the limiting part in one embodiment;

[0025] Figure 8 This is a schematic diagram of the positioning element in one embodiment;

[0026] Figure 9 for Figure 8 Top view of the structure shown. Detailed Implementation

[0027] This utility model analyzes why the seat surface of current portable chairs needs to be made of relatively thick fabric. It finds that in existing technologies, a fixing connector is fixed at the corner of the seat surface. Whether fixed by sewing (forming needle holes) or gluing, the connection point between the fixing connector and the seat surface must independently bear the localized stress generated by the weight of the human body transmitted to the portable chair frame. The bonding area between the fixing connector and the sheet material is limited, and the stress is only transmitted through the local connection points of the sewn stitches or glued areas. The stress per unit area is large, easily causing the fabric seat surface to tear at the connection point. Therefore, to prevent the seat surface from tearing or detaching due to excessive stress at the connection point and to ensure structural reliability, it is necessary to increase the thickness of the seat surface fabric to enhance local strength. However, this ultimately restricts further improvements in the lightweight and portability of portable chairs.

[0028] To reduce the thickness of the chair surface, this invention attempts to eliminate the fixed connectors on the surface. Instead, the corners of the surface are knotted to form a limiting knot, which is then fixed to the portable chair frame by a positioning component. The fabric of the seat surface is gathered into a cluster at and near the limiting knot, forming multiple overlapping contact surfaces. When the weight of the human body is transferred to the limiting knot and the surrounding overlapping contact surfaces, the stress is evenly distributed across multiple fiber directions of the fabric surface, rather than concentrated at a single local connection point. Simultaneously, the self-locking structure formed by the intertwining and compression of the fabric fibers during the knotting process extends the stress transmission path along the direction of the seat corners (i.e., from the limiting knot towards the main body of the seat surface), further reducing the stress per unit area. This eliminates the need to increase thickness to compensate for insufficient local strength while still meeting load-bearing requirements. Therefore, with this design, portable chairs can use thinner fabric for the seat surface, reducing weight and folding volume, and improving portability.

[0029] The present invention will now be described in detail with reference to the accompanying drawings.

[0030] Example 1

[0031] Please see Figure 1 The portable chair of Embodiment 1 of this utility model includes a portable chair support 10 and a seat 20 detachably fixed to the portable chair support 10. The portable chair support 10 includes chair legs 11, seat support rods 12, and positioning members 30 for fixing the seat 20 to the seat support rods 12. The lower end of each seat support rod 12 is connected to the upper end of a chair leg 11. In this embodiment, each chair leg 11 and each seat support rod 12 are detachably fixedly connected by a set of connecting components 13.

[0032] To ensure the stability of the portable chair support, at least three chair legs 11 should be provided. In this embodiment, there are four chair legs 11. The connecting assembly 13 includes four connecting rods 131 and four T-joints 132. The two ends of the four connecting rods 131 are sequentially spliced ​​together by the T-joints 132 to form a quadrilateral, which is horizontal in use. The upper ends of the four chair legs 11 are each connected to one of the T-joints 132, and the lower ends are supported on the ground. There are also four seat support rods 12, and the lower end of each seat support rod 12 is also connected to one of the T-joints 132, with the upper end facing upwards. In this way, the upper ends of the chair legs 11 and the lower ends of the seat support rods 12 are detachably fixedly connected by the T-joints 132. The quadrilateral formed by the connecting rods 131 is fixed between the chair legs 11 and the seat support rods 12 to enhance structural stability.

[0033] The chair surface 20 is a flexible surface, specifically a thin piece of fabric, whose corners can be knotted to form limiting knots 22. The overall shape of the chair surface 20 is polygonal, and the number of its sides and corners is the same as the number of chair surface support rods 12. Preferably, as shown... Figure 2 As shown, in this embodiment, the chair surface 20 includes a quadrilateral main body 21 and a corner extension 23 extending outward from the corners of the quadrilateral main body 21 in the four corner directions. The limiting knot 22 is formed at the corner extension 23, making it easier to tie the knot.

[0034] The positioning element 30 is fixed to the upper end of the seat support rod 12, and includes a positioning part 31 and a limiting part 32. Specifically, in this embodiment, as... Figure 3As shown, the positioning part 31 is fixed to the upper end of the seat support rod 12, and the limiting part 32 is fixed to the top of the positioning part 31, and the two are an integral structure. The bottom surface of the limiting part 32 and the top surface 31a of the positioning part 31 enclose a limiting cavity 33. The size of the limiting cavity 33 is smaller than the maximum size of the limiting knot 22 that can be formed by the seat 20, so that the limiting knot 22 cannot pass through the limiting cavity 33. When installing the seat 20, the corner extensions 23 at the four corners of the seat 20 pass through the limiting cavity 33 of the positioning part 30, and then a knot is tied at the free end of the corner extensions 23 that pass out of the limiting cavity 33 to form a limiting knot 22. The limiting knot 22 cannot return to pass through the limiting cavity 33, thereby fixing the four corners of the seat 20 to the seat support rod 12. When bearing weight, the top surface 31a of the positioning part 31 of the positioning part 30 provides the main upward support force for the seat 20. Meanwhile, the tension of the seat surface 20 can be flexibly adjusted by adjusting the formation position of the limiting knot 22.

[0035] Furthermore, in a preferred embodiment, the top surface 31a of the positioning part 31 of the positioning member 30 is an arc surface that is concave downward in the middle. While assisting in the positioning of the seat surface 20, it also causes the corners of the seat surface 20 to fold towards the middle at the top surface 31a of the positioning part 31 to form a multi-faceted overlapping contact surface, further strengthening the strength of this position and ensuring the load-bearing capacity of the seat surface 20.

[0036] In some embodiments, the positioning element 30 and the seat support rod 12 are an integral structure.

[0037] In some preferred embodiments, such as Figure 4 As shown, the positioning member 30 is detachably and positionably fixed to the seat support rod 12. Specifically, the lower end of the positioning part 31 of the positioning member 30 is a sleeve structure that matches the seat support rod 12, so that the positioning member 30 is sleeved on the seat support rod 12. A plurality of positioning through holes 34 are spaced apart on the side wall of the lower end of the positioning part 31 along the axial direction of its sleeve structure. An elastic locking protrusion 35 is provided on the side wall of the upper end of the seat support rod 12, which can engage with the positioning through holes 34 of the positioning part 31. By engaging the elastic locking protrusion 35 into different positioning through holes 34, the fixed height of the positioning member 30 on the seat support rod 12 can be adjusted, thereby adjusting the height of each corner of the seat 20, and thus adjusting the tension of the seat 20, or making two adjacent positioning members 30 higher to form a backrest. During disassembly, lowering the higher positioning member 30 first makes the seat 20 looser and easier to disassemble. The fully detachable positioning piece 30 also facilitates storage and makes it easy to carry.

[0038] In some modified embodiments, such as Figure 5As shown, the main body 21' of the seat 20 is a quadrilateral piece of fabric with notches at all four corners. A cord-threading channel 23a is provided at the edges of the four notches on the main body 21' of the seat 20, and a retractable cord 23b is threaded through the cord-threading channel 23a. The retractable cord 23b and the cord-threading channel 23a together form a corner extension 23' extending outward from the corner of the main body 21'. After flattening the seat 20 and passing the corner extension 23' through the limiting cavity 33, the two ends of the retractable cord 23b are pulled out, causing the fabric at the cord-threading channel 23a to contract and gather into a ball. Then, the two ends of the retractable cord 23b are wrapped and knotted to secure it, preventing the fabric at the cord-threading channel 23a from stretching out. The contracted cord-threading channel 23a and the retractable cord 23b together form a large, ball-shaped limiting knot 22', which cannot pass through the limiting cavity 33.

[0039] In some other modified embodiments, as one specific way of connecting the chair leg 11 and the seat support rod 12, the chair leg 11 and the seat support rod 12 are an integral structure, that is, the two are a single leg. The legs are detachably fixedly connected to each other by connecting components to form a stable support structure.

[0040] Example 2

[0041] The difference between Embodiment 2 and Embodiment 1 is that the limiting part 32' of the positioning member 30 is adjustablely fixed on the top surface 31a of the positioning part 31', so that the size of the limiting cavity 33 formed by the limiting part 32' and the positioning part 31' is adjustable.

[0042] Specifically, such as Figure 6 As shown, in this embodiment, the top surface 31a of the positioning part 31' of the positioning member 30 is still an arc surface with a downward concave center, while the limiting part 32' is a straight plate. The two ends of the straight plate are fixed to the top edge of the arc-shaped top surface 31a of the positioning part 31' by screws 32a. The straight plate of the limiting part 32' and the arc-shaped top surface 31a of the positioning part 31' form a limiting cavity 33. At this time, the limiting part 32' is detachably and adjustablely fixedly connected to the positioning part 31'. Loosening the screws 32a allows the straight plate of the limiting part 32' to move away from the positioning part 31', increasing the space of the limiting cavity 33 and facilitating the passage of the corner extension 23 of the chair surface 20. After forming the limiting knot 22, tightening the screws 32a reduces the space of the limiting cavity 33, enhancing the limiting effect of the limiting cavity 33 on the limiting knot 22, making the installation of the chair surface 20 more stable. With this portable chair support structure, the corresponding seat 20 can be replaced according to the user's preference. When replacing the seat 20 with different sizes and thicknesses, the user can freely adjust the size of the limiting cavity 33 by adjusting the screw 32a for adaptive fixation.

[0043] Additionally, in a modified embodiment of Example 2, such as Figure 7 As shown, one end of the limiting part 32' is hinged to the edge of the arc-shaped top surface 31a of the positioning part 31' via a hinge 32b, and the other end is detachably and adjustably fixed to the edge of the arc-shaped top surface 31a of the positioning part 31' via a screw 32a. By fully loosening the screw 32a, the limiting part 32' can be fully opened to facilitate passage through the corner extension 23 of the seat surface 20; while by covering the straight plate and tightening the screw 32a, the straight plate and the top surface 31a of the positioning part 31' can be enclosed and fixed to form a limiting cavity 33, which is used to limit the limiting knot 22 of the seat surface 20.

[0044] Furthermore, the limiting part 32' has a clamping protrusion 36 with a central protrusion fixed on its surface facing the positioning part 31', specifically a spring sheet with a central protrusion. When the screw 32a is tightened, the clamping protrusion 36 is located in the limiting cavity 33, which can further reduce the space in the limiting cavity 33, enhance the limiting effect on the limiting joint 22, and even clamp the corner extension 23 of the seat surface 20, further enhancing the fixing effect.

[0045] Example 3

[0046] like Figure 8 and Figure 9 As shown, the difference between Embodiment 3 and Embodiment 1 is that the limiting part 32” of the positioning member 30 is fixed on the side wall of the positioning part 31' and located on the side of the positioning part 31' away from the main body 21 of the seat surface 20. Specifically, the top surface 31a of the positioning part 31' of the positioning member 30 is an arc-shaped top surface 31a, and the limiting part 32” of the positioning member 30 is a “U”-shaped component, with both ends fixed on the side wall of the positioning part 31' and forming a limiting cavity 33'.

[0047] When installing the seat 20, the corner extension 23 of the seat 20 first passes through the arc-shaped top surface 31a of the positioning part 31', through the limiting cavity 33 formed by the limiting part 32” and the positioning part 31', and then is knotted at the free end that exits the limiting cavity 33' to form a limiting knot 22. In this way, the limiting cavity 33' formed by the limiting part 32” of the positioning member 30 is still used to limit the limiting knot 22, the top surface 31a of the positioning part 31' still provides upward support for the corner of the seat 20, and the limiting part 32” fixes the knot to the side wall of the positioning part 31'.

[0048] In some embodiments, the limiting portion 32” and the positioning portion 31’ of the positioning member 30 are integrally formed, as in Embodiment 1. In other embodiments, the limiting portion 32” of the positioning member 30 is adjustablely fixed to the positioning portion 31’, as in Embodiment 2, forming an adjustable limiting cavity 33’.

[0049] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments and claims of this application are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that, unless otherwise stated, “a plurality” means two or more; the terms “first,” “second,” “third,” etc., are used only to distinguish and not to describe a particular order or sequence, nor should they be construed as indicating or implying relative importance. The term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items. When the above description relates to drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A portable chair stand, comprising: It has at least three chair legs, which are detachably and securely connected to each other; There are at least three seat support rods, and the lower end of each seat support rod is connected to the upper end of a chair leg; The feature is that it further includes a positioning component, which includes a positioning part fixed to the upper end of the seat support rod and a limiting part disposed on the positioning part; a limiting cavity can be formed between the limiting part and the positioning part.

2. The portable chair stand according to claim 1, characterized in that: The limiting part of the positioning member is fixed to the top surface of the positioning part.

3. The portable chair stand according to claim 1, characterized in that: The limiting part of the positioning member is fixed to the side wall of the positioning part.

4. The portable chair stand according to claim 1, characterized in that: The top surface of the positioning part is recessed downwards in the middle.

5. The portable chair stand according to any one of claims 1-4, characterized in that: The limiting portion of the positioning member is adjustablely fixed on the positioning portion so that the size of the limiting cavity is adjustable.

6. The portable chair stand according to claim 5, characterized in that: The positioning member has a clamping protrusion on the side surface near the positioning member that can be used to reduce the space inside the positioning cavity.

7. The portable chair stand according to any one of claims 1-4, characterized in that: The positioning part of the positioning element is detachably fixed to the upper end of the seat support rod.

8. The portable chair stand according to any one of claims 1-4, characterized in that: The positioning part of the positioning element is adjustablely fixed to the upper end of the seat support rod.

9. A portable chair, comprising: A portable chair frame and a seat surface detachably fixed to the portable chair frame; the seat surface is a flexible seat surface. Its features are: The portable chair stand is the portable chair stand as described in any one of claims 1-8; The corner of the chair surface passes through the top surface of the positioning part of the positioning member and through the limiting cavity, and a limiting knot is formed at the free end of the chair surface that passes through the limiting cavity. The limiting knot cannot pass through the limiting cavity.

10. The portable chair according to claim 9, characterized in that: The chair surface includes a polygonal main body and corner extensions extending outward from the corners of the main body; the limiting knot is formed at the corner extensions.

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