Folding chair

Abstract

The utility model discloses a folding chair which comprises a chair frame assembly and a cloth cover, the cloth cover is installed at the upper end of the chair frame assembly, the chair frame assembly comprises a cross rod, a rotating joint, a first connecting seat and a second connecting seat, the rotating joint is fixed at the front end of the cross rod, the first connecting seat is installed at the rear end of the cross rod through a sliding mechanism, and the second connecting seat is installed at the rear end of the cross rod. A first supporting rod is inserted into the upper end of the first connecting seat, a rear foot rod is inserted into the lower end of the first connecting seat, connecting rods are fixed to the left end and the right end of the rotating joint respectively, the other ends of the connecting rods are fixed to a second connecting seat, a second supporting rod is inserted into the upper end of the second connecting seat, and a front foot rod is inserted into the lower end of the second connecting seat. The utility model has the advantages of keeping the characteristic of convenient folding and storage, obviously improving the bearing structure, enhancing the use stability, effectively prolonging the service life of the product and ensuring the use safety.

Description

Technical Field

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

[0002] Folding chairs are widely used in outdoor activities such as camping, picnics, fishing, and watching sports events due to their ease of storage and portability. Chairs that fold and fold using a mechanism similar to an umbrella are particularly popular due to their convenient operation and compact size. These chairs typically consist of a central pivot joint, multiple radially distributed supporting rods, a seat fabric, and a leg support structure. Pulling the central rod unfolds or folds the supporting rods. In umbrella-style folding chairs currently on the market, the supporting rods are usually hinged directly or indirectly to the central pivot joint. When the user sits, the body weight is primarily applied to the fabric cover at the top of the supporting rods. The support rod extends outward from the pivot joint, forming a long lever arm. According to the lever principle, the weight of the human body will generate a huge bending moment at the connection between the support rod and the pivot joint. This causes the pivot joint and its connection point to bear a great concentrated stress, becoming a weak link in the structure. Under long-term use or heavy load, the pivot joint is prone to cracking, the connection of the support rod is prone to deformation or even breakage, which seriously affects the structural stability and service life of the chair. As users' requirements for portability and structural durability continue to increase, higher requirements are placed on the structural design of folding chairs, especially the need to achieve convenient and neat folding and storage while ensuring load-bearing stability. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a folding chair that can maintain the convenient folding and storage characteristics, improve the load-bearing structure, enhance the stability of use, effectively extend the product life, and ensure safe use.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a folding chair, including a chair frame assembly and a fabric cover, the fabric cover being installed on the upper end of the chair frame assembly, the chair frame assembly including a crossbar, a rotating joint, a first connecting seat and a second connecting seat, the rotating joint being fixed to the front end of the crossbar, the first connecting seat being installed on the rear end of the crossbar through a sliding mechanism, a first support rod being inserted into the upper end of the first connecting seat, a rear leg rod being inserted into the lower end of the first connecting seat, connecting rods being fixed to the left and right ends of the rotating joint respectively, the other end of the connecting rod being fixed to the second connecting seat, a second support rod being inserted into the upper end of the second connecting seat, and a front leg rod being inserted into the lower end of the second connecting seat.

[0005] Furthermore, the sliding mechanism includes a groove and a through hole. The groove is disposed on the crossbar, and the through hole is disposed on two opposite sides of the first connecting seat. The first connecting seat moves back and forth on the crossbar by means of bolts passing through the through hole and the groove.

[0006] Furthermore, the rotary joint includes a fixed seat, a first rotary seat, and a second rotary seat. One end of the fixed seat is fixed to the crossbar, and the other end is hinged to the first rotary seat and the second rotary seat. The first rotary seat and the second rotary seat are both hinged to the same position on the fixed seat, and the rotation directions of the first rotary seat and the second rotary seat on the fixed seat are opposite. A limiting mechanism is provided on the fixed seat to limit the rotation angle of the first rotary seat and the second rotary seat. Both the first rotary seat and the second rotary seat are provided with mounting grooves, and the connecting rod is fixed in the mounting grooves.

[0007] Furthermore, the limiting mechanism includes a limiting block integrally disposed on the front outer surface of the fixed seat. When the first rotating seat rotates to the limiting block, the side of the first rotating seat abuts against the limiting block, preventing the first rotating seat from continuing to rotate. When the second rotating seat rotates to the limiting block, the side of the second rotating seat abuts against the limiting block, preventing the second rotating seat from continuing to rotate.

[0008] Furthermore, when the first connecting seat is located at the front end of the slide groove, the ratio of the distance from the hinge point on the fixed seat to the upper end of the first support rod to the distance from the hinge point on the fixed seat to the upper end of the second support rod is 3.5:2.

[0009] Furthermore, the first support rod is a telescopic rod, and the four corners of the cloth cover are respectively fixedly installed on the upper ends of the first support rod and the second support rod. The second connecting seat is connected to the second support rod and the front leg rod through an elastic connector, and the first connecting seat is connected to the first support rod and the rear leg rod through an elastic connector.

[0010] Furthermore, the rear end of the first connector is provided with an expansion slot, which is used to install a sunshade.

[0011] Compared with existing technologies, the advantages of this utility model are: using a rigid crossbar as the core load-bearing beam, shortening the distance from the upper end of the first and second support rods to the fulcrum, weakening the lever effect, solving the problems of joint cracking, support rod deformation or breakage caused by stress concentration in umbrella-shaped structures, optimizing the load-bearing structure, increasing the product's strength, and extending its service life; the crossbar is slidably connected to the first connecting seat, realizing dynamic adjustment of the support point position. When the chair is unfolded for use, the first connecting seat slides forward along the crossbar to retract, shortening the distance from the front and rear ends of the crossbar to the midpoint, improving the stability of the product structure. At the same time, when folding for storage, the first connecting seat slides backward and pulls out, making the length of each rod and the crossbar more consistent, avoiding the rods crossing and messy, and improving the neatness and compactness of storage; in addition, the first support rod is a telescopic rod, which allows the fabric cover to be directly fixed to the chair frame assembly, reducing the operation of installing and removing the fabric cover, making the use and storage of the product more convenient; an expansion slot is provided on the first connecting seat, enhancing the product's functional expandability, making the product more functional and easy to use. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention (excluding the fabric cover);

[0013] Figure 2 This is a schematic diagram of the connection structure between the crossbar and the first connecting seat of this utility model;

[0014] Figure 3 This is an exploded view of the rotary joint of this utility model;

[0015] Figure 4 This is a schematic diagram of the usage state of this utility model (excluding the cloth cover);

[0016] Figure 5 This is a schematic diagram of the storage state of this utility model (excluding the cloth cover). Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-5As shown, a folding chair includes a chair frame assembly and a fabric cover (not shown in the figure). The fabric cover is installed on the upper end of the chair frame assembly. The chair frame assembly includes a crossbar 1, a rotating joint 2, a first connecting seat 3, and a second connecting seat 4. The rotating joint 2 is fixed to the front end of the crossbar 1. The rotating joint 2 includes a fixed seat 21, a first rotating seat 22, and a second rotating seat 23. One end of the fixed seat 21 is fixed to the crossbar 1, and the other end is hinged to the first rotating seat 22 and the second rotating seat 23. The first rotating seat 22 and the second rotating seat 23 are both hinged to the same position on the fixed seat 21, and the first rotating seat 22 and the second rotating seat 23 are on the fixed seat 21. The rotation directions on the first rotating seat 22 and the second rotating seat 23 are opposite. A limiting mechanism is provided on the fixed seat 21 to limit the rotation angle of the first rotating seat 22 and the second rotating seat 23. The limiting mechanism includes a limiting block 211, which is integrally disposed on the outer surface of the front end of the fixed seat 21. When the first rotating seat 22 rotates to the limiting block 211, the side of the first rotating seat 22 abuts against the limiting block 211, preventing the first rotating seat 22 from continuing to rotate. When the second rotating seat 23 rotates to the limiting block 211, the side of the second rotating seat 23 abuts against the limiting block 211, preventing the second rotating seat 23 from continuing to rotate. In this embodiment, when... During use, because the limiting block 211 blocks between the first rotating seat 22 and the second rotating seat 23, when the user sits on the cloth cover, the first rotating seat 22 and the second rotating seat 23, which would normally continue to rotate relative to each other under the pressure of gravity, will not rotate, making the use process safer. Both the first rotating seat 22 and the second rotating seat 23 are provided with mounting grooves 24, and a connecting rod 5 is fixed in the mounting groove 24. The other end of the connecting rod 5 is fixed to the second connecting seat 4. A second support rod 6 is inserted into the upper end of the second connecting seat 4, and a front foot rod 7 is inserted into the lower end of the second connecting seat 4. The first connecting seat 3 is installed via a sliding mechanism. At the rear end of the crossbar 1, a first support rod 8 is inserted into the upper end of the first connecting seat 3, and a rear foot rod 9 is inserted into the lower end of the first connecting seat 3. The sliding mechanism includes a sliding groove 11 and a through hole 31. The sliding groove 11 is set on the crossbar 1, and the through hole 31 is set on two opposite sides of the first connecting seat 3. The first connecting seat 3 moves back and forth on the crossbar 1 by bolts passing through the through hole 31 and the sliding groove 11. When this embodiment is in use, the first connecting seat 3 is located at the front end of the sliding groove 11. The ratio of the distance from the hinge point on the fixed seat 21 to the upper end of the first support rod 8 to the distance from the hinge point on the fixed seat 21 to the upper end of the second support rod 6 is 3.The 5:2 ratio shortens the distance from the first connecting seat 3 and the rotating joint 2 to the midpoint, improving the stability of the product structure. When this embodiment is in the storage state, the first connecting seat 3 is slid backward, so that the folded lengths of the front leg 7, rear leg 9, first support rod 8, and second support rod 6 are all roughly flush with the length of the crossbar 1, avoiding the cross-shaped and messy rods in the storage state and improving the neatness and compactness of the storage. The first support rod 8 is a telescopic rod, and the four corners of the fabric cover are fixed to the upper ends of the first support rod 8 and the second support rod 6 respectively. The fabric cover is fixed to the chair frame assembly, reducing the installation and removal of the fabric cover during use and storage, making it more convenient to use. The first connecting seat 3 The first support rod 8 and the rear leg 9 are connected via elastic connectors. The lower end of the first support rod 8 is connected to the upper end of the first connecting seat 3 via an elastic rope, and the upper end of the rear leg 9 is connected to the lower end of the first connecting seat 3 via an elastic rope. The second connecting seat 4 is connected to the second support rod 6 and the front leg 7 via elastic connectors. The lower end of the second support rod 6 is connected to the upper end of the second connecting seat 4 via an elastic rope, and the upper end of the front leg 7 is connected to the lower end of the second connecting seat 4 via an elastic rope. An expansion slot 32 is provided at the rear end of the first connecting seat 3. The expansion slot 32 is used to install the sunshade 10, thus expanding the product's functionality and making it more suitable for the needs of modern outdoor activities.

[0019] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A folding chair comprising a chair frame assembly and a cloth cover mounted at an upper end of the chair frame assembly, characterized in that, The chair frame assembly includes a crossbar, a rotating joint, a first connecting seat, and a second connecting seat. The rotating joint is fixed to the front end of the crossbar. The first connecting seat is mounted on the rear end of the crossbar via a sliding mechanism. A first support rod is inserted into the upper end of the first connecting seat, and a rear leg rod is inserted into the lower end of the first connecting seat. Connecting rods are fixed to the left and right ends of the rotating joint, and the other end of each connecting rod is fixed to the second connecting seat. A second support rod is inserted into the upper end of the second connecting seat, and a front leg rod is inserted into the lower end of the second connecting seat.

2. A folding chair as claimed in claim 1, characterized in that The sliding mechanism includes a groove and a through hole. The groove is disposed on the crossbar, and the through hole is disposed on two opposite sides of the first connecting seat. The first connecting seat moves back and forth on the crossbar by means of bolts passing through the through hole and the groove.

3. A folding chair as claimed in claim 2, characterized in that The rotating joint includes a fixed base, a first rotating base, and a second rotating base. One end of the fixed base is fixed to the crossbar, and the other end is hinged to the first and second rotating bases. The first and second rotating bases are both hinged to the same position on the fixed base, and the rotation directions of the first and second rotating bases on the fixed base are opposite. A limiting mechanism is provided on the fixed base to limit the rotation angle of the first and second rotating bases. Both the first and second rotating bases are provided with mounting grooves, and the connecting rod is fixed in the mounting grooves.

4. A folding chair as claimed in claim 3, characterized in that The limiting mechanism includes a limiting block integrally disposed on the front outer surface of the fixed seat. When the first rotating seat rotates to the limiting block, the side of the first rotating seat abuts against the limiting block, preventing the first rotating seat from continuing to rotate. When the second rotating seat rotates to the limiting block, the side of the second rotating seat abuts against the limiting block, preventing the second rotating seat from continuing to rotate.

5. A folding chair as defined in claim 3, wherein, When the first connecting seat is located at the front end of the slide groove, the ratio of the distance from the hinge point on the fixed seat to the upper end of the first support rod to the distance from the hinge point on the fixed seat to the upper end of the second support rod is 3.5:

2.

6. A folding chair as defined in claim 1, wherein, The first support rod is a telescopic rod, and the four corners of the cloth cover are respectively fixedly installed on the upper ends of the first support rod and the second support rod. The second connecting seat is connected to the second support rod and the front leg rod through an elastic connector, and the first connecting seat is connected to the first support rod and the rear leg rod through an elastic connector.

7. A folding chair as defined in claim 1, wherein, The rear end of the first connector is provided with an expansion slot, which is used to install a sunshade.

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