Folding chair frame and folding chair thereof

Abstract

A folding chair frame and a folding chair thereof are disclosed. The folding chair frame includes a support base and multiple connection components, an outer side surface of the support base is provided with multiple installation grooves distributed along a circumferential direction thereof in a one-to-one correspondence with the connection components. The installation groove is provided with a limiting part, the first connection base is provided with a first fitting part, the second connection base is provided with a second fitting part. When the connection component is unfolded, the first fitting part abuts against the limiting part to limit upward rotation of the first connection base relative to the support base, and the second fitting part abuts against the limiting part to limit upward rotation of the second connection base relative to the support base. The present invention has advantages of a simple and ingenious structure and easy operations.

Description

RELATED APPLICATIONS

[0001] The present patent document claims the benefit of priority to patent application Ser. No. 20 / 242,0788174.8, filed Apr. 16, 2024, and entitled “FOLDING CHAIR FRAME AND FOLDING CHAIR THEREOF,” the entire contents of each of which are incorporated herein by reference.BACKGROUND1. Technical Field

[0002] The present invention relates to the technical field of outdoor articles, and in particular to a folding chair frame and a folding chair thereof.2. Background Information

[0003] A folding chair frame in the prior art includes a base fixed with several racks, and several support legs hinged around the base. Each rack is provided with first teeth on both sides, and second teeth are provided on both sides of an upper end of the support leg. The upper end of the support leg is placed between two racks, and the second teeth of the support leg are meshed with the first teeth of the rack respectively, to implement unfolding and folding of a chair through a meshing motion of the second teeth and the first teeth. A folding chair frame in the prior art also includes a main body, a stopper, a first rotating part, and a second rotating part. The stopper is placed in an inner cavity of the main body and can slide up and down along the inner cavity. The first rotating part and the second rotating part are limited in rotation angles by the stopper, and a position of the stopper is controlled by a button, thereby implementing unfolding and folding of a chair. The two types of folding chair frames have the following shortcomings: complicated structures and high costs.BRIEF SUMMARY

[0004] The present invention provides a folding chair frame and a folding chair thereof with a simple and ingenious structure and simple operations, to resolve the technical problems existing in the prior art.

[0005] Technical solutions used to resolve the technical problem in the present invention are as follows: a folding chair frame, including a support base and a plurality of connection components, an outer side surface of the support base is provided with a plurality of installation grooves distributed along a circumferential direction thereof in a one-to-one correspondence with the connection components; each connection component includes a first connection base connected to a support rod and a second connection base connected to a foot rod, the first connection base and the second connection base are respectively rotatably connected to corresponding installation grooves, so that the connection component can be folded or unfolded, and when each connection component is unfolded, each support rod tilts upward and each foot rod tilts downward, where the installation groove is provided with a limiting part, the first connection base is provided with a first fitting part, the second connection base is provided with a second fitting part, and when the connection component is unfolded, the first fitting part abuts against the limiting part to limit upward rotation of the first connection base relative to the support base, and the second fitting part abuts against the limiting part to limit upward rotation of the second connection base relative to the support base.

[0006] Further, the installation groove includes two installation boards arranged opposite each other on a left side and a right side, the first connection base and the second connection base are hinged between the two installation boards, and the limiting part is disposed between tops of the two installation boards.

[0007] Further, the first connection base includes a first installation part and a first connection part fixed on the first installation part and connected to the support rod, the second connection base includes a second installation part and a second connection part fixed on the second installation part and connected to the foot rod, and the first installation part and the second installation part are respectively rotatably connected to the installation groove; and the first fitting part is a limiting surface located on a side surface of the first connection part and close to the first installation part, and the second fitting part is a limiting tooth protruding from the second installation part.

[0008] Further, a rotation axis of the first connection base coincides with a rotation axis of the second connection base, and an angle limiting structure is matched between the first connection base and the second connection base, to enable the first connection base and the second connection base to be relatively fixed.

[0009] Further, the angle limiting structure includes a limiting groove and a limiting column, the limiting groove is disposed in one of the first installation part and the second installation part, and the limiting column is disposed in the other of the first installation part and the second installation part; and the limiting groove is in the shape of a long strip arc and is disposed around the rotation axis, the limiting column is adapted to slide in the limiting groove, and when the second connection base is unfolded, the limiting column is clamped at one end of the limiting groove, so that the second connection base moves in an unfolding direction following the first connection base.

[0010] Further, a rotation axis of the first installation part coincides with a rotation axis of the second installation part; and the first connection part is provided with an allowance groove, and when the connection component is unfolded, the limiting tooth is clamped in the allowance groove; or when the connection component is folded, the support rods connected to the first connection part and the foot rods connected to the second connection part are stacked together.

[0011] Further, in a plurality of connection components, support rods of some connection components are base rods, support rods of remaining connection components are back rods, the back rods are located behind the base rods, and a length of the back rod is greater than a length of the base rod.

[0012] Further, the support rods and / or foot rods are tubular, and free ends of the foot rods are provided with foot sleeves; and there are four connection components, and the four connection components are arranged in pairs.

[0013] Further, the support rods are telescopic rods, which can be extended or shortened.

[0014] The present invention further provides a folding chair, including a flexible base surface, where the folding chair further includes the above folding chair frame, and one end, of the support rod, away from the first connection base of each connection component, is connected to the flexible base surface, so that the first connection base for restrictively connecting the flexible base surface to the support rod is rotated downward relative to the support base when the folding chair frame is in the unfolded state.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The limiting structure of the folding chair frame in the present invention is simple and ingenious. The installation groove in the support groove is provided with the limiting part, the first connection base of each connection component is provided with the first fitting part, and each second connection base is provided with the second fitting part. When each connection component is unfolded, each first fitting part and each second fitting part separately abut against the limiting part, to separately limit upward rotation of the first connection base and the second connection base relative to the support base. It can be learned that each connection component can be separately limited in the installation groove to ensure that all connection components do not affect each other, thereby smoothly implementing the unfolding and folding of the folding chair frame. The folding chair frame in the present invention has a simpler structure and requires lower manufacturing costs.

[0017] 2. The angle limiting structure is matched between the first connection base and the second connection base, so that the first connection base and the second connection base can be relatively fixed, and the folding chair frame is more stable in an unfolded state.

[0018] 3. During the unfolding of the second connection base, the limiting column is clamped at one end of the limiting groove, so that the second connection base moves in an unfolding direction following the first connection base, making the operation simpler and eliminating the need for additional operation of the foot rod, thus providing a simpler product for people to use outdoors.

[0019] The present invention is further described in detail with reference to the accompanying drawings and embodiments. However, the folding chair frame and folding chair thereof in the present invention are not limited to the embodiments.BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 is a three-dimensional diagram of a folding chair frame in an unfolded state according to the present invention;

[0021] FIG. 2 is a state diagram of the folding chair frame after a support rod rotates downward according to the present invention;

[0022] FIG. 3 is a three-dimensional diagram of the folding chair frame in a folded state according to the present invention;

[0023] FIG. 4 is a schematic enlarged diagram of a point A in FIG. 3 according to the present invention;

[0024] FIG. 5 is a three-dimensional diagram of a connection between a connection component (with the connection component unfolded) and a support base according to the present invention;

[0025] FIG. 6 is a three-dimensional diagram of the support base according to the present invention;

[0026] FIG. 7 is a first partial sectional view of FIG. 5;

[0027] FIG. 8 is a second partial sectional view of FIG. 5;

[0028] FIG. 9 is a three-dimensional diagram of a connection between a first connection base and a second connection base according to the present invention;

[0029] FIG. 10 is a partial sectional view of FIG. 9;

[0030] FIG. 11 is a three-dimensional diagram of the second connection base according to the present invention;

[0031] FIG. 12 is a three-dimensional diagram of the first second connection base according to the present invention; and

[0032] FIG. 13 is a three-dimensional diagram of the folding chair according to the present invention.

[0033] In the drawings: 1. connection component; 10. first connection base; 101. first installation part; 102. first connection part; 1011. limiting groove; 1021. limiting surface; 1022. allowance groove; 11. second connection base; 111. second installation part; 1111, limiting tooth; 1112, limiting column; 112. second connection part; 2. support base; 20. installation groove; 21. limiting part; 22. installation board; 3. support rod; 31. base rod; 32. back rod; 4. foot rod; 5. foot sleeve.DETAILED DESCRIPTION OF THE DRAWINGS AND THE PRESENTLY PREFERRED EMBODIMENTS

[0034] In the present invention, the terms “first”, “second”, and the like are only used to distinguish between similar objects, and are neither used to describe a specific order or sequence, nor used to indicate or imply relative importance. The use of “up”, “down”, “inside”, “outside”, “top / bottom” and other directional or positional relationships in the description are based on directional or positional relationships shown in the accompanying drawings, only for the convenience of describing the present invention, and does not indicate or imply that an apparatus referred to needs to have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art may understand specific meanings of the foregoing terms in this application according to specific cases.

[0035] In addition, in the description of the present invention, unless otherwise stated, “a plurality of” means two or more than two. The term “and / or” describes an association relationship between associated objects and indicates that three relationships may exist. For example, A and / or B may indicate the following three cases: Only A exists, both A and B exist, and only B exists. A character “ / ” usually indicates an “or” relationship between the associated objects.

[0036] Refer to FIG. 1 to FIG. 12. A folding chair frame in the present invention includes a support base 2 and a plurality of connection components 1. An outer side surface of the support base 2 is provided with a plurality of installation grooves 20 distributed along a circumferential direction thereof in a one-to-one correspondence with the connection components 1. Each connection component 1 includes a first connection base 10 connected to a support rod 3 and a second connection base 11 connected to a foot rod 4. The first connection base 10 and the second connection base 11 are rotatably connected to corresponding installation grooves 20, so that the connection component 1 can be folded or unfolded. When the connection component 1 is unfolded, each support rod 3 tilts upward and each foot rod 4 tilts downward.

[0037] As shown in FIG. 5 and FIG. 6, the installation groove 20 is provided with a limiting part 21, the first connection base 10 is provided with a first fitting part, and the second connection base 11 is provided with a second fitting part. When the connection component 1 is unfolded, as shown in FIG. 7, the first fitting part abuts against the limiting part 21 to limit upward rotation of the first connection base 10 relative to the support base 2. As shown in FIG. 8, the second fitting part abuts against the limiting part 21 to limit upward rotation of the second connection base 11 relative to the support base 2.

[0038] In this embodiment, all connection components 1 can be individually limited in the installation groove 20 to ensure that all connection components 1 do not affect each other, thereby smoothly implementing the unfolding and folding of the folding chair frame. The first connection base 10 and the second connection base 11 can be limited simultaneously. A limiting structure for the first connection base 10 and the second connection base 11 to respectively abut against to be matched with the limiting part 21 of the support base 2 is simple and ingenious with low manufacturing costs.

[0039] As shown in FIG. 6, the installation groove 20 includes two installation boards 22 arranged opposite each other on a left side and a right side. As shown in FIG. 5, the first connection base 10 and the second connection base 11 are hinged between the two installation boards 22, and the limiting part 21 is disposed between tops of the two installation boards 22.

[0040] As shown in FIG. 12, the first connection base 10 includes a first installation part 101 with a rotating surface and a first connection part 102 fixed on the rotating surface of the first installation part 101 and connected to the support rod 3. As shown in FIG. 11, the second connection base 11 includes a second installation part 111 with a rotating surface and a second connection part 112 fixed on the rotating surface of the second installation part111 and connected to the foot rod 4. As shown in FIG. 7 and FIG. 8, the first installation part 101 and the second installation part 111 are respectively rotatably connected to the installation groove 20. As shown in FIG. 12, the first fitting part is a limiting surface 1021 located on a side surface of the first connection part 102 and close to the first installation part 101. As shown in FIG. 11, the second fitting part is a limiting tooth 1111 protruding from the rotating surface of the second installation part 111.

[0041] Refer to FIG. 9 and FIG. 10. A rotation axis of the first connection base 10 coincides with a rotation axis of the second connection base 11. Therefore, the first connection base 10 and the second connection base 11 can be rotatably connected to the installation groove 20 using a same rotating shaft, or can be rotatably connected to the installation groove 20 through two rotating shaft respectively, and the two rotating shafts are on a same axis. Specifically, in this embodiment, screws are threaded onto the two installation boards 22 of the installation groove 20, and the two screws are on a same axis. The two screws form the two rotating shafts and are respectively threaded through a shaft hole provided in the middle of the first connection part 102 and a shaft hole provided in the middle of the second connection part 112.

[0042] Refer to FIG. 9 to FIG. 12. An angle limiting structure is matched between the first connection base 10 and the second connection base 11, so that the first connection base 10 and the second connection base 11 can be relatively fixed, and the folding chair frame is more stable in an unfolded state.

[0043] Refer to FIG. 11 and FIG. 12. The angle limiting structure includes a limiting groove 1011 and a limiting column 1112. The limiting groove 1011 is disposed in one of the first installation part 101 and the second installation part 111, and the limiting column 1112 is disposed in the other of the first installation part 101 and the second installation part 111. The limiting groove 1011 is in the shape of a long strip arc and is disposed around the rotation axis. The limiting column 1112 is adapted to slide in the limiting groove 1011. When the second connection base 11 is unfolded, the limiting column 1112 is clamped at one end of the limiting groove 1011, so that the second connection base 11 moves in an unfolding direction following the first connection base 10.

[0044] The limiting groove 1011 is specifically disposed on the first installation part 101, and the limiting column 1112 is specifically disposed on the second installation part 111, which are not limited thereto. A quantity of the limiting grooves 1011 can be set corresponding to a quantity of the limiting columns 1112, which can be one or more. In this embodiment, there may be two limiting grooves 1011 and two limiting columns 1112, the two limiting grooves 1011 are arranged relative to each other, and the two limiting columns 1112 are also arranged relative to each other.

[0045] As shown in FIG. 12, the first connection part 102 is provided with an allowance groove 1022. When the connection component 1 is unfolded, the limiting tooth 1111 is clamped in the allowance groove 1022, as shown in FIG. 9. When the connection component 1 is folded, the support rods 3 connected by the first connection part 102 and the foot rods 4 connected by the second connection part 112 are stacked and attached to each other, so that the support rods 3 and the foot rods 4 can be simultaneously stressed and rotated downward, providing a more compact structure.

[0046] As shown in FIG. 1, in a plurality of connection components 1, some support rods 3 of the connection component 1 are base rods 31, remaining support rods 3 of the connection component 1 are back rods 32, the back rods 32 are located behind the base rods 31, and a length of the back rod 32 is greater than a length of the base rod 31.

[0047] In this embodiment, there are four connection components 1, the four connection components 1 are arranged in pairs. Further, the four connection components 1 include two base rods 31 and two back rods 32.

[0048] The support rods 3 and / or the foot rods 4 are tubular-shaped, and a free end of the foot rod 4 is provided with a foot sleeve 5 to stabilize the support structure.

[0049] The support rods 3 are telescopic rods with a self-locking function, which can be extended or shortened.

[0050] Refer to FIG. 1. Each base rod 31 is a sleeved structure, including a first base tube and a second base tube that are sleeved sequentially, and the two base tubes can slide relatively and be connected at a limit through a limiting ball and a limiting hole. Each back rod 32 is also a sleeved structure, including a first back tube, a second back tube, and a third back tube that are sleeved sequentially, and adjacent back tubes can also slide relatively and be connected at a limit through a limiting ball and a limiting hole.

[0051] Specifically, a lower end of a base tube or a back tube is welded and fixed with a plunger installed with a limiting ball, an upper end of an upper end of another adjacent base tube or back tube is provided with a limiting hole, a spring is also installed in the plunger, the spring is fixedly connected to the limiting ball, the limiting ball abuts against an inner wall of the base tube or the back tube, and the spring is compressed and deformed by an extrusion force of the inner wall of the base tube or the back tube, so that the limiting ball can be embedded or separated from the limiting hole, and the length of each base rod 31 and back rod 32 can be extended or shortened.

[0052] As shown in FIG. 13, the folding chair of the present invention includes a flexible base surface 6 and a folding chair frame. One end, of the support rod 3, away from the first connection base 10 of each connection component 1, is connected to the flexible base surface 6, so that the first connection base 10 for restrictively connecting the flexible base surface 6 to the support rod 3 is rotated downward relative to the support base 2 when the folding chair frame is in the unfolded state. The first connection base 10 restricts downward rotation of the second connection base 11 through the above angular limiting structure, and the limiting surface 1021, on the first connection base 10, connected to the support rod 3 abuts against and is matched with the limiting part 21 in the installation groove 20, and the limiting tooth 1111 on the second connection base 11 abuts against and is matched with the limiting part 21 in the installation groove 20, so that upward rotation of the first connection base 10 and the second connection base 11 is limited, and the support structure of the folding chair after unfolded is more stable with a stronger support force and better use safety.

[0053] During unfolding, as shown in FIG. 3, the folding chair frame is in a folded state. First, the support rod 3 is pulled up to rotate, and the support rod 3 is extended to the limiting column 1112 to be clamped at one end of the limiting groove 1011. In this case, the second connection base 11 follows the first connection base 10 to move in an unfolding direction, that is, the support rod 3 drives the foot rod 4 to rotate upward, until the limiting surface 1021 and the limiting tooth 1111 simultaneously abut against the limiting part 21; and then the support rod 3 is extended to a maximum length, implementing rapid unfolding.

[0054] During folding, as shown in FIG. 1, the folding chair frame is in an unfolded state. First, the length of the support rod 3 is shortened to the shortest, then the support rod 3 is rotated downward to fit the foot rod 4, as shown in FIG. 3, and then is continuously rotated downward, so that each foot rod 4 is attached in a bundle to a center position of the support base 2 and, implementing rapid folding.

[0055] During unfolding or folding, all connection components 1 can be individually limited in the installation groove 20 to ensure that all connection components 1 do not affect each other, thereby smoothly implementing the unfolding and folding of the folding chair frame. A rotating connection in each connection component 1 can be simultaneously limited by the first connection base 10 and the second connection base 11 in the support base 2. A structure for the limiting surface 1021 of the first connection base 10 and the limiting tooth 1111 of the second connection base 11 to respectively abut against and be matched with the limiting part 21 of the support base 2 is simple and ingenious, with lower manufacturing costs; In addition, an angle limiting structure is matched between the first connection base 10 and the second connection base 11, so that the first connection base 10 and the second connection base 11 can be relatively fixed, and the folding chair frame is more stable in the unfolded state. During the unfolding of the second connection base 11, the limiting column 1112 is clamped at one end of the limiting groove 1011, so that the second connection base 11 moves in an unfolding direction following the first connection base 10, making the operation simpler and eliminating the need for additionally operating the foot rod 4, thus providing a simpler product for people to use outdoors.

[0056] In combination with the folding chair shown in FIG. 13, when the folding chair frame is unfolded, the length of the support rod 3 is first extended to the longest, and then the flexible base surface 6 is connected to one end, of the support rod 3 of each connection component 1, away from the first connection base 10, so that the flexible connection surface 6 that is restrictively connected to the first connection base 10 of the support rod 3 is rotated downward relative to the support base 2, thereby fixing the first connection base 10. The first connection base 10 restricts downward rotation of the second connection base 11 through the above angular limiting structure, and the limiting surface 1021, on the first connection base 10, connected to the support rod 3 abuts against and is matched with the limiting part 21 in the installation groove 20, and the limiting tooth 1111 on the second connection base 11 abuts against and is matched with the limiting part 21 in the installation groove 20, so that upward rotation of the first connection base 10 and the second connection base 11 is limited, and the support structure of the folding chair after unfolded is more stable with a stronger support force and better use safety. During folding, the length of the support rod 3 is shortened to the shortest, so that the support rod 3 cannot support the flexible base surface 6, and the flexible base surface 6 also loses a tension force for the support rod 3. The support rods 3 can be rotated downward until the support rods are in contact with the foot rods 4. Finally, the foot rods 4 can be attached in a bundle toward the center position of the support base 2 to implement rapid folding.

[0057] For the folding chair frame and the folding chair thereof in the present invention, unrelated parts are the same as related parts in the prior art or can be implemented by using the prior art.

[0058] The above embodiments are only used to further illustrate the folding chair frame and folding chair thereof in the present invention, but the present invention is not limited to the embodiments, and any simple modifications, equivalent changes, and modifications made to the above embodiments according to the technical essence of the present invention fall within the protection scope of the technical solutions of the present invention.

Examples

Embodiment Construction

[0034]In the present invention, the terms “first”, “second”, and the like are only used to distinguish between similar objects, and are neither used to describe a specific order or sequence, nor used to indicate or imply relative importance. The use of “up”, “down”, “inside”, “outside”, “top / bottom” and other directional or positional relationships in the description are based on directional or positional relationships shown in the accompanying drawings, only for the convenience of describing the present invention, and does not indicate or imply that an apparatus referred to needs to have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art may understand specific meanings of the foregoing terms in this application according to specific cases.

[0035]In addition, in the description of the present invention, unless otherwise stated, “a plur...

RELATED APPLICATIONS

[0001] The present patent document claims the benefit of priority to patent application Ser. No. 20 / 242,0788174.8, filed Apr. 16, 2024, and entitled “FOLDING CHAIR FRAME AND FOLDING CHAIR THEREOF,” the entire contents of each of which are incorporated herein by reference.BACKGROUND1. Technical Field

[0002] The present invention relates to the technical field of outdoor articles, and in particular to a folding chair frame and a folding chair thereof.2. Background Information

[0003] A folding chair frame in the prior art includes a base fixed with several racks, and several support legs hinged around the base. Each rack is provided with first teeth on both sides, and second teeth are provided on both sides of an upper end of the support leg. The upper end of the support leg is placed between two racks, and the second teeth of the support leg are meshed with the first teeth of the rack respectively, to implement unfolding and folding of a chair through a meshing motion of the second teeth and the first teeth. A folding chair frame in the prior art also includes a main body, a stopper, a first rotating part, and a second rotating part. The stopper is placed in an inner cavity of the main body and can slide up and down along the inner cavity. The first rotating part and the second rotating part are limited in rotation angles by the stopper, and a position of the stopper is controlled by a button, thereby implementing unfolding and folding of a chair. The two types of folding chair frames have the following shortcomings: complicated structures and high costs.BRIEF SUMMARY

[0004] The present invention provides a folding chair frame and a folding chair thereof with a simple and ingenious structure and simple operations, to resolve the technical problems existing in the prior art.

[0005] Technical solutions used to resolve the technical problem in the present invention are as follows: a folding chair frame, including a support base and a plurality of connection components, an outer side surface of the support base is provided with a plurality of installation grooves distributed along a circumferential direction thereof in a one-to-one correspondence with the connection components; each connection component includes a first connection base connected to a support rod and a second connection base connected to a foot rod, the first connection base and the second connection base are respectively rotatably connected to corresponding installation grooves, so that the connection component can be folded or unfolded, and when each connection component is unfolded, each support rod tilts upward and each foot rod tilts downward, where the installation groove is provided with a limiting part, the first connection base is provided with a first fitting part, the second connection base is provided with a second fitting part, and when the connection component is unfolded, the first fitting part abuts against the limiting part to limit upward rotation of the first connection base relative to the support base, and the second fitting part abuts against the limiting part to limit upward rotation of the second connection base relative to the support base.

[0006] Further, the installation groove includes two installation boards arranged opposite each other on a left side and a right side, the first connection base and the second connection base are hinged between the two installation boards, and the limiting part is disposed between tops of the two installation boards.

[0007] Further, the first connection base includes a first installation part and a first connection part fixed on the first installation part and connected to the support rod, the second connection base includes a second installation part and a second connection part fixed on the second installation part and connected to the foot rod, and the first installation part and the second installation part are respectively rotatably connected to the installation groove; and the first fitting part is a limiting surface located on a side surface of the first connection part and close to the first installation part, and the second fitting part is a limiting tooth protruding from the second installation part.

[0008] Further, a rotation axis of the first connection base coincides with a rotation axis of the second connection base, and an angle limiting structure is matched between the first connection base and the second connection base, to enable the first connection base and the second connection base to be relatively fixed.

[0009] Further, the angle limiting structure includes a limiting groove and a limiting column, the limiting groove is disposed in one of the first installation part and the second installation part, and the limiting column is disposed in the other of the first installation part and the second installation part; and the limiting groove is in the shape of a long strip arc and is disposed around the rotation axis, the limiting column is adapted to slide in the limiting groove, and when the second connection base is unfolded, the limiting column is clamped at one end of the limiting groove, so that the second connection base moves in an unfolding direction following the first connection base.

[0010] Further, a rotation axis of the first installation part coincides with a rotation axis of the second installation part; and the first connection part is provided with an allowance groove, and when the connection component is unfolded, the limiting tooth is clamped in the allowance groove; or when the connection component is folded, the support rods connected to the first connection part and the foot rods connected to the second connection part are stacked together.

[0011] Further, in a plurality of connection components, support rods of some connection components are base rods, support rods of remaining connection components are back rods, the back rods are located behind the base rods, and a length of the back rod is greater than a length of the base rod.

[0012] Further, the support rods and / or foot rods are tubular, and free ends of the foot rods are provided with foot sleeves; and there are four connection components, and the four connection components are arranged in pairs.

[0013] Further, the support rods are telescopic rods, which can be extended or shortened.

[0014] The present invention further provides a folding chair, including a flexible base surface, where the folding chair further includes the above folding chair frame, and one end, of the support rod, away from the first connection base of each connection component, is connected to the flexible base surface, so that the first connection base for restrictively connecting the flexible base surface to the support rod is rotated downward relative to the support base when the folding chair frame is in the unfolded state.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The limiting structure of the folding chair frame in the present invention is simple and ingenious. The installation groove in the support groove is provided with the limiting part, the first connection base of each connection component is provided with the first fitting part, and each second connection base is provided with the second fitting part. When each connection component is unfolded, each first fitting part and each second fitting part separately abut against the limiting part, to separately limit upward rotation of the first connection base and the second connection base relative to the support base. It can be learned that each connection component can be separately limited in the installation groove to ensure that all connection components do not affect each other, thereby smoothly implementing the unfolding and folding of the folding chair frame. The folding chair frame in the present invention has a simpler structure and requires lower manufacturing costs.

[0017] 2. The angle limiting structure is matched between the first connection base and the second connection base, so that the first connection base and the second connection base can be relatively fixed, and the folding chair frame is more stable in an unfolded state.

[0018] 3. During the unfolding of the second connection base, the limiting column is clamped at one end of the limiting groove, so that the second connection base moves in an unfolding direction following the first connection base, making the operation simpler and eliminating the need for additional operation of the foot rod, thus providing a simpler product for people to use outdoors.

[0019] The present invention is further described in detail with reference to the accompanying drawings and embodiments. However, the folding chair frame and folding chair thereof in the present invention are not limited to the embodiments.BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 is a three-dimensional diagram of a folding chair frame in an unfolded state according to the present invention;

[0021] FIG. 2 is a state diagram of the folding chair frame after a support rod rotates downward according to the present invention;

[0022] FIG. 3 is a three-dimensional diagram of the folding chair frame in a folded state according to the present invention;

[0023] FIG. 4 is a schematic enlarged diagram of a point A in FIG. 3 according to the present invention;

[0024] FIG. 5 is a three-dimensional diagram of a connection between a connection component (with the connection component unfolded) and a support base according to the present invention;

[0025] FIG. 6 is a three-dimensional diagram of the support base according to the present invention;

[0026] FIG. 7 is a first partial sectional view of FIG. 5;

[0027] FIG. 8 is a second partial sectional view of FIG. 5;

[0028] FIG. 9 is a three-dimensional diagram of a connection between a first connection base and a second connection base according to the present invention;

[0029] FIG. 10 is a partial sectional view of FIG. 9;

[0030] FIG. 11 is a three-dimensional diagram of the second connection base according to the present invention;

[0031] FIG. 12 is a three-dimensional diagram of the first second connection base according to the present invention; and

[0032] FIG. 13 is a three-dimensional diagram of the folding chair according to the present invention.

[0033] In the drawings: 1. connection component; 10. first connection base; 101. first installation part; 102. first connection part; 1011. limiting groove; 1021. limiting surface; 1022. allowance groove; 11. second connection base; 111. second installation part; 1111, limiting tooth; 1112, limiting column; 112. second connection part; 2. support base; 20. installation groove; 21. limiting part; 22. installation board; 3. support rod; 31. base rod; 32. back rod; 4. foot rod; 5. foot sleeve.DETAILED DESCRIPTION OF THE DRAWINGS AND THE PRESENTLY PREFERRED EMBODIMENTS

[0034] In the present invention, the terms “first”, “second”, and the like are only used to distinguish between similar objects, and are neither used to describe a specific order or sequence, nor used to indicate or imply relative importance. The use of “up”, “down”, “inside”, “outside”, “top / bottom” and other directional or positional relationships in the description are based on directional or positional relationships shown in the accompanying drawings, only for the convenience of describing the present invention, and does not indicate or imply that an apparatus referred to needs to have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art may understand specific meanings of the foregoing terms in this application according to specific cases.

[0035] In addition, in the description of the present invention, unless otherwise stated, “a plurality of” means two or more than two. The term “and / or” describes an association relationship between associated objects and indicates that three relationships may exist. For example, A and / or B may indicate the following three cases: Only A exists, both A and B exist, and only B exists. A character “ / ” usually indicates an “or” relationship between the associated objects.

[0036] Refer to FIG. 1 to FIG. 12. A folding chair frame in the present invention includes a support base 2 and a plurality of connection components 1. An outer side surface of the support base 2 is provided with a plurality of installation grooves 20 distributed along a circumferential direction thereof in a one-to-one correspondence with the connection components 1. Each connection component 1 includes a first connection base 10 connected to a support rod 3 and a second connection base 11 connected to a foot rod 4. The first connection base 10 and the second connection base 11 are rotatably connected to corresponding installation grooves 20, so that the connection component 1 can be folded or unfolded. When the connection component 1 is unfolded, each support rod 3 tilts upward and each foot rod 4 tilts downward.

[0037] As shown in FIG. 5 and FIG. 6, the installation groove 20 is provided with a limiting part 21, the first connection base 10 is provided with a first fitting part, and the second connection base 11 is provided with a second fitting part. When the connection component 1 is unfolded, as shown in FIG. 7, the first fitting part abuts against the limiting part 21 to limit upward rotation of the first connection base 10 relative to the support base 2. As shown in FIG. 8, the second fitting part abuts against the limiting part 21 to limit upward rotation of the second connection base 11 relative to the support base 2.

[0038] In this embodiment, all connection components 1 can be individually limited in the installation groove 20 to ensure that all connection components 1 do not affect each other, thereby smoothly implementing the unfolding and folding of the folding chair frame. The first connection base 10 and the second connection base 11 can be limited simultaneously. A limiting structure for the first connection base 10 and the second connection base 11 to respectively abut against to be matched with the limiting part 21 of the support base 2 is simple and ingenious with low manufacturing costs.

[0039] As shown in FIG. 6, the installation groove 20 includes two installation boards 22 arranged opposite each other on a left side and a right side. As shown in FIG. 5, the first connection base 10 and the second connection base 11 are hinged between the two installation boards 22, and the limiting part 21 is disposed between tops of the two installation boards 22.

[0040] As shown in FIG. 12, the first connection base 10 includes a first installation part 101 with a rotating surface and a first connection part 102 fixed on the rotating surface of the first installation part 101 and connected to the support rod 3. As shown in FIG. 11, the second connection base 11 includes a second installation part 111 with a rotating surface and a second connection part 112 fixed on the rotating surface of the second installation part111 and connected to the foot rod 4. As shown in FIG. 7 and FIG. 8, the first installation part 101 and the second installation part 111 are respectively rotatably connected to the installation groove 20. As shown in FIG. 12, the first fitting part is a limiting surface 1021 located on a side surface of the first connection part 102 and close to the first installation part 101. As shown in FIG. 11, the second fitting part is a limiting tooth 1111 protruding from the rotating surface of the second installation part 111.

[0041] Refer to FIG. 9 and FIG. 10. A rotation axis of the first connection base 10 coincides with a rotation axis of the second connection base 11. Therefore, the first connection base 10 and the second connection base 11 can be rotatably connected to the installation groove 20 using a same rotating shaft, or can be rotatably connected to the installation groove 20 through two rotating shaft respectively, and the two rotating shafts are on a same axis. Specifically, in this embodiment, screws are threaded onto the two installation boards 22 of the installation groove 20, and the two screws are on a same axis. The two screws form the two rotating shafts and are respectively threaded through a shaft hole provided in the middle of the first connection part 102 and a shaft hole provided in the middle of the second connection part 112.

[0042] Refer to FIG. 9 to FIG. 12. An angle limiting structure is matched between the first connection base 10 and the second connection base 11, so that the first connection base 10 and the second connection base 11 can be relatively fixed, and the folding chair frame is more stable in an unfolded state.

[0043] Refer to FIG. 11 and FIG. 12. The angle limiting structure includes a limiting groove 1011 and a limiting column 1112. The limiting groove 1011 is disposed in one of the first installation part 101 and the second installation part 111, and the limiting column 1112 is disposed in the other of the first installation part 101 and the second installation part 111. The limiting groove 1011 is in the shape of a long strip arc and is disposed around the rotation axis. The limiting column 1112 is adapted to slide in the limiting groove 1011. When the second connection base 11 is unfolded, the limiting column 1112 is clamped at one end of the limiting groove 1011, so that the second connection base 11 moves in an unfolding direction following the first connection base 10.

[0044] The limiting groove 1011 is specifically disposed on the first installation part 101, and the limiting column 1112 is specifically disposed on the second installation part 111, which are not limited thereto. A quantity of the limiting grooves 1011 can be set corresponding to a quantity of the limiting columns 1112, which can be one or more. In this embodiment, there may be two limiting grooves 1011 and two limiting columns 1112, the two limiting grooves 1011 are arranged relative to each other, and the two limiting columns 1112 are also arranged relative to each other.

[0045] As shown in FIG. 12, the first connection part 102 is provided with an allowance groove 1022. When the connection component 1 is unfolded, the limiting tooth 1111 is clamped in the allowance groove 1022, as shown in FIG. 9. When the connection component 1 is folded, the support rods 3 connected by the first connection part 102 and the foot rods 4 connected by the second connection part 112 are stacked and attached to each other, so that the support rods 3 and the foot rods 4 can be simultaneously stressed and rotated downward, providing a more compact structure.

[0046] As shown in FIG. 1, in a plurality of connection components 1, some support rods 3 of the connection component 1 are base rods 31, remaining support rods 3 of the connection component 1 are back rods 32, the back rods 32 are located behind the base rods 31, and a length of the back rod 32 is greater than a length of the base rod 31.

[0047] In this embodiment, there are four connection components 1, the four connection components 1 are arranged in pairs. Further, the four connection components 1 include two base rods 31 and two back rods 32.

[0048] The support rods 3 and / or the foot rods 4 are tubular-shaped, and a free end of the foot rod 4 is provided with a foot sleeve 5 to stabilize the support structure.

[0049] The support rods 3 are telescopic rods with a self-locking function, which can be extended or shortened.

[0050] Refer to FIG. 1. Each base rod 31 is a sleeved structure, including a first base tube and a second base tube that are sleeved sequentially, and the two base tubes can slide relatively and be connected at a limit through a limiting ball and a limiting hole. Each back rod 32 is also a sleeved structure, including a first back tube, a second back tube, and a third back tube that are sleeved sequentially, and adjacent back tubes can also slide relatively and be connected at a limit through a limiting ball and a limiting hole.

[0051] Specifically, a lower end of a base tube or a back tube is welded and fixed with a plunger installed with a limiting ball, an upper end of an upper end of another adjacent base tube or back tube is provided with a limiting hole, a spring is also installed in the plunger, the spring is fixedly connected to the limiting ball, the limiting ball abuts against an inner wall of the base tube or the back tube, and the spring is compressed and deformed by an extrusion force of the inner wall of the base tube or the back tube, so that the limiting ball can be embedded or separated from the limiting hole, and the length of each base rod 31 and back rod 32 can be extended or shortened.

[0052] As shown in FIG. 13, the folding chair of the present invention includes a flexible base surface 6 and a folding chair frame. One end, of the support rod 3, away from the first connection base 10 of each connection component 1, is connected to the flexible base surface 6, so that the first connection base 10 for restrictively connecting the flexible base surface 6 to the support rod 3 is rotated downward relative to the support base 2 when the folding chair frame is in the unfolded state. The first connection base 10 restricts downward rotation of the second connection base 11 through the above angular limiting structure, and the limiting surface 1021, on the first connection base 10, connected to the support rod 3 abuts against and is matched with the limiting part 21 in the installation groove 20, and the limiting tooth 1111 on the second connection base 11 abuts against and is matched with the limiting part 21 in the installation groove 20, so that upward rotation of the first connection base 10 and the second connection base 11 is limited, and the support structure of the folding chair after unfolded is more stable with a stronger support force and better use safety.

[0053] During unfolding, as shown in FIG. 3, the folding chair frame is in a folded state. First, the support rod 3 is pulled up to rotate, and the support rod 3 is extended to the limiting column 1112 to be clamped at one end of the limiting groove 1011. In this case, the second connection base 11 follows the first connection base 10 to move in an unfolding direction, that is, the support rod 3 drives the foot rod 4 to rotate upward, until the limiting surface 1021 and the limiting tooth 1111 simultaneously abut against the limiting part 21; and then the support rod 3 is extended to a maximum length, implementing rapid unfolding.

[0054] During folding, as shown in FIG. 1, the folding chair frame is in an unfolded state. First, the length of the support rod 3 is shortened to the shortest, then the support rod 3 is rotated downward to fit the foot rod 4, as shown in FIG. 3, and then is continuously rotated downward, so that each foot rod 4 is attached in a bundle to a center position of the support base 2 and, implementing rapid folding.

[0055] During unfolding or folding, all connection components 1 can be individually limited in the installation groove 20 to ensure that all connection components 1 do not affect each other, thereby smoothly implementing the unfolding and folding of the folding chair frame. A rotating connection in each connection component 1 can be simultaneously limited by the first connection base 10 and the second connection base 11 in the support base 2. A structure for the limiting surface 1021 of the first connection base 10 and the limiting tooth 1111 of the second connection base 11 to respectively abut against and be matched with the limiting part 21 of the support base 2 is simple and ingenious, with lower manufacturing costs; In addition, an angle limiting structure is matched between the first connection base 10 and the second connection base 11, so that the first connection base 10 and the second connection base 11 can be relatively fixed, and the folding chair frame is more stable in the unfolded state. During the unfolding of the second connection base 11, the limiting column 1112 is clamped at one end of the limiting groove 1011, so that the second connection base 11 moves in an unfolding direction following the first connection base 10, making the operation simpler and eliminating the need for additionally operating the foot rod 4, thus providing a simpler product for people to use outdoors.

[0056] In combination with the folding chair shown in FIG. 13, when the folding chair frame is unfolded, the length of the support rod 3 is first extended to the longest, and then the flexible base surface 6 is connected to one end, of the support rod 3 of each connection component 1, away from the first connection base 10, so that the flexible connection surface 6 that is restrictively connected to the first connection base 10 of the support rod 3 is rotated downward relative to the support base 2, thereby fixing the first connection base 10. The first connection base 10 restricts downward rotation of the second connection base 11 through the above angular limiting structure, and the limiting surface 1021, on the first connection base 10, connected to the support rod 3 abuts against and is matched with the limiting part 21 in the installation groove 20, and the limiting tooth 1111 on the second connection base 11 abuts against and is matched with the limiting part 21 in the installation groove 20, so that upward rotation of the first connection base 10 and the second connection base 11 is limited, and the support structure of the folding chair after unfolded is more stable with a stronger support force and better use safety. During folding, the length of the support rod 3 is shortened to the shortest, so that the support rod 3 cannot support the flexible base surface 6, and the flexible base surface 6 also loses a tension force for the support rod 3. The support rods 3 can be rotated downward until the support rods are in contact with the foot rods 4. Finally, the foot rods 4 can be attached in a bundle toward the center position of the support base 2 to implement rapid folding.

[0057] For the folding chair frame and the folding chair thereof in the present invention, unrelated parts are the same as related parts in the prior art or can be implemented by using the prior art.

[0058] The above embodiments are only used to further illustrate the folding chair frame and folding chair thereof in the present invention, but the present invention is not limited to the embodiments, and any simple modifications, equivalent changes, and modifications made to the above embodiments according to the technical essence of the present invention fall within the protection scope of the technical solutions of the present invention.

Examples

Embodiment Construction

[0034]In the present invention, the terms “first”, “second”, and the like are only used to distinguish between similar objects, and are neither used to describe a specific order or sequence, nor used to indicate or imply relative importance. The use of “up”, “down”, “inside”, “outside”, “top / bottom” and other directional or positional relationships in the description are based on directional or positional relationships shown in the accompanying drawings, only for the convenience of describing the present invention, and does not indicate or imply that an apparatus referred to needs to have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art may understand specific meanings of the foregoing terms in this application according to specific cases.

[0035]In addition, in the description of the present invention, unless otherwise stated, “a plur...

Claims

1. A folding chair frame, comprising a support base and a plurality of connection components, wherein an outer side surface of the support base is provided with a plurality of installation grooves distributed along a circumferential direction thereof in a one-to-one correspondence with the connection components; each connection component comprises a first connection base connected to a support rod and a second connection base connected to a foot rod, the first connection base and the second connection base are respectively rotatably connected to corresponding installation grooves, so that the connection component can be folded or unfolded, and when each connection component is unfolded, each support rod tilts upward and each foot rod tilts downward, whereinthe installation groove is provided with a limiting part, the first connection base is provided with a first fitting part, the second connection base is provided with a second fitting part, and when the connection component is unfolded, the first fitting part abuts against the limiting part to limit upward rotation of the first connection base relative to the support base, and the second fitting part abuts against the limiting part to limit upward rotation of the second connection base relative to the support base.

2. The folding chair according to claim 1, wherein the installation groove comprises two installation boards arranged opposite each other on a left side and a right side, the first connection base and the second connection base are hinged between the two installation boards, and the limiting part is disposed between tops of the two installation boards.

3. The folding chair according to claim 1, wherein the first connection base comprises a first installation part and a first connection part fixed on the first installation part and connected to the support rod, the second connection base comprises a second installation part and a second connection part fixed on the second installation part and connected to the foot rod, and the first installation part and the second installation part are respectively rotatably connected to the installation groove; and the first fitting part is a limiting surface located on a side surface of the first connection part and close to the first installation part, and the second fitting part is a limiting tooth protruding from the second installation part.

4. The folding chair according to claim 3, wherein a rotation axis of the first connection base coincides with a rotation axis of the second connection base, and an angle limiting structure is matched between the first connection base and the second connection base, to enable the first connection base and the second connection base to be relatively fixed.

5. The folding chair according to claim 4, wherein the angle limiting structure comprises a limiting groove and a limiting column, the limiting groove is disposed in one of the first installation part and the second installation part, and the limiting column is disposed in the other of the first installation part and the second installation part; and the limiting groove is in the shape of a long strip arc and is disposed around the rotation axis, the limiting column is adapted to slide in the limiting groove, and when the second connection base is unfolded, the limiting column is clamped at one end of the limiting groove, so that the second connection base moves in an unfolding direction following the first connection base.

6. The folding chair according to claim 3, wherein a rotation axis of the first installation part coincides with a rotation axis of the second installation part; and the first connection part is provided with an allowance groove, and when the connection component is unfolded, the limiting tooth is clamped in the allowance groove; or when the connection component is folded, the support rods connected to the first connection part and the foot rods connected to the second connection part are stacked together.

7. The folding chair according to claim 1, wherein in a plurality of connection components, support rods of some connection components are base rods, support rods of remaining connection components are back rods, the back rods are located behind the base rods, and a length of the back rod is greater than a length of the base rod.

8. The folding chair according to claim 1, wherein the support rods and / or foot rods are tubular, and free ends of the foot rods are provided with foot sleeves;and there are four connection components, and the four connection components are arranged in pairs.

9. The folding chair according to claim 1, wherein the support rods are telescopic rods with a self-locking function, which can be extended or shortened.

10. A folding chair, comprising a flexible base surface, wherein the folding chair further comprises the folding chair frame according to claim 1, and one end, of the support rod, away from the first connection base of each connection component 1, is connected to the flexible base surface, so that the first connection base for restrictively connecting the flexible base surface to the support rod is rotated downward relative to the support base when the folding chair frame is in the unfolded state.

Images