Folding chair frame and folding chair thereof

Abstract

The utility model discloses a folding chair frame and a folding chair thereof, which comprise a supporting seat, a plurality of first connecting seats and a plurality of second connecting seats, the first connecting bases and the second connecting bases can rotate around the first direction or the second direction relative to the supporting base to be in a folded state or an unfolded state, and angle limiting structures are arranged between the first connecting bases and the second connecting bases or between the first connecting bases and the second connecting bases in a matched mode. The angle limiting structure is used for limiting rotation of the second connecting base in the first direction when the first connecting base and the second connecting base are in the unfolded state and releasing limitation on rotation of the second connecting base in the first direction when the first connecting base rotates. According to the utility model, the unfolding stability and the operation convenience can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of outdoor products, in particular to a folding chair frame and a folding chair. Background Art

[0002] Folding chairs are one of the outdoor products, usually used in people's daily outings. Generally, users require that the folding chair be small in size after folding for easy carrying, and that the structure be stable for durability, and that it be folded and unfolded more conveniently when in use. Some folding chairs in the prior art do not take the effect of gravity into consideration when they are designed, and when the folding chair leaves the ground, it will automatically collapse without control, so there are certain safety hazards; some folding chairs have complex parts structure and high production cost. In addition, the more parts there are, the more likely it is to produce fatigue failure, which affects the service life. Utility Model Content

[0003] The utility model aims at solving the technical problems existing in the prior art and provides a folding chair frame and a folding chair.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a folding chair frame, including a support seat and a plurality of first connecting seats and a plurality of second connecting seats hinged on the support seat, the plurality of first connecting seats and the plurality of second connecting seats can be rotated around a first direction or a second direction relative to the support seat to be in a folded state or an unfolded state, and an angle limiting structure is provided between or among the first connecting seat and the second connecting seat, and the angle limiting structure is used to limit the second connecting seat from rotating around a first direction when the first connecting seat and the second connecting seat are in an unfolded state, and to release the restriction on the second connecting seat from rotating around the first direction when the first connecting seat rotates.

[0005] Furthermore, the angle limiting structure includes an assembly groove and a cam, the assembly groove is arranged in one of the first connecting seat and the second connecting seat and its side wall is provided with a limiting groove, the cam is arranged in the other of the first connecting seat and the second connecting seat and is provided with a tooth portion, the cam is rotatably embedded in the assembly groove, and the tooth portion is limited to the limiting groove.

[0006] Furthermore, the rotation axis of the first connecting seat coincides with the rotation axis of the second connecting seat; the limiting groove extends circumferentially along the assembly groove, the tooth portion is slidably connected in the limiting groove, and when the first connecting seat rotates about the second direction to an unfolded state, the tooth portion is clamped at one end of the limiting groove to limit the rotation of the second connecting seat about the first direction.

[0007] Furthermore, the support seat is provided with a plurality of mounting grooves and limiting portions, the plurality of mounting grooves are distributed at intervals along the circumference of the support seat, the first connecting seat and the second connecting seat are hinged between two opposite sides of the corresponding mounting grooves, and the limiting portions are arranged between the tops of the mounting grooves.

[0008] Furthermore, the first connecting seat includes a first limiting tooth, a first mounting portion provided with the assembly groove, and a first connecting portion fixed on the first mounting portion and connected to the seat rod or the back rod, and the second connecting seat includes a second limiting tooth, a second mounting portion provided with the cam, and a second connecting portion fixed on the second mounting portion and connected to the foot rod.

[0009] Furthermore, the first limiting tooth and the second limiting tooth are respectively protruded on the first mounting portion and the second mounting portion; when the first connecting seat and the second connecting seat are in the unfolded state, the first limiting tooth and the second limiting tooth respectively abut against the limiting portion provided on the supporting seat to limit the first connecting seat and the second connecting seat from rotating in the second direction.

[0010] Furthermore, the seat rod or back rod connected to the first connecting seat and the foot rod connected to the second connecting seat are staggered with each other, and the opposite ends of the seat rod or back rod and the foot rod are in contact with each other.

[0011] Furthermore, the number of the first connecting seats and the second connecting seats are four respectively and they are arranged opposite to each other in pairs; the first connecting seats connecting the two back rods are located at the rear side of the first connecting seats connecting the two seat rods, and the length of the back rod is greater than the length of the seat rod; the seat rod and the back rod are telescopic rods with self-locking function, so that they can be extended or shortened.

[0012] Furthermore, when the first connecting seat is unfolded, a first angle and a second angle greater than the first angle are formed between the first connecting seat connected to the back rod and the first connecting seat connected to the seat rod and the supporting seat respectively.

[0013] The utility model further provides a folding chair, comprising a flexible seat surface and a folding chair frame, wherein the ends of the seat rods or back rods connected to the first connecting seats and away from the second connecting seats are respectively connected to the flexible seat surfaces, so that in the unfolded state, the flexible seat surfaces restrict the first connecting seats from rotating in the second direction relative to the support seat.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. A folding chair of the utility model, wherein an angle limiting structure is provided between the first connecting seat and the second connecting seat or between the first connecting seat and the second connecting seat, and the angle limiting structure is used to limit the second connecting seat from rotating around a first direction when the first connecting seat and the second connecting seat are in an unfolded state, and to release the restriction on the second connecting seat from rotating around the first direction when the first connecting seat rotates, so that the first connecting seat and the second connecting seat can be relatively fixed and can be linked to each other, thereby improving the stability during unfolding and the convenience of operation.

[0016] 2. The utility model provides a folding chair, which is designed with a structure that the teeth of the cam and the limiting grooves of the assembly groove are locked and abutted against each other during the rotational cooperation process, and utilizes the connection strength of the cam and the teeth of the cam to further strengthen the connection strength of the entire angle limiting structure, making the product more firm and durable.

[0017] 3. In a folding chair of the utility model, a seat rod or a back rod connected to a first connecting seat and a foot rod connected to a second connecting seat are staggered with each other, and the opposite ends of the seat rod or the back rod and the foot rod fit together. This structural design is simpler, and while ensuring the overall connection strength of the angle limiting structure, it avoids cumbersome structural design, facilitates production and manufacturing, and can also reduce certain costs.

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, the folding chair frame and folding chair of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a three-dimensional folding chair frame Figure 1 (expanded state);

[0020] Figure 2 It is a three-dimensional diagram of the folding chair of the utility model (in the unfolded state);

[0021] Figure 3 It is a three-dimensional diagram of the first connecting seat and the second connecting seat of the utility model connected to the supporting seat (in the unfolded state);

[0022] Figure 4 It is a three-dimensional diagram of the support seat of the utility model;

[0023] Figure 5 It is a three-dimensional structure in which the first connecting seat and the second connecting seat of the utility model are connected. Figure 1 ;

[0024] Figure 6 It is a three-dimensional structure in which the first connecting seat and the second connecting seat of the utility model are connected. Figure 2 ;

[0025] Figure 7It is a three-dimensional diagram of the first connecting seat of the utility model;

[0026] Figure 8 It is a three-dimensional diagram of the second connecting seat of the utility model;

[0027] Fig. 9 It is a schematic diagram of the connection between the first connecting seat and the second connecting seat of the utility model (in the unfolded state);

[0028] Fig.10 It is a schematic diagram of the connection between the first connecting seat and the second connecting seat of the utility model (folded state);

[0029] Fig.11 It is a three-dimensional folding chair frame of the utility model. Figure 2 (folded state);

[0030] Fig.12 It is a three-dimensional folding chair frame of the utility model. Figure 3 (folded state);

[0031] Fig.13 It is a three-dimensional folding chair frame of the utility model. Figure 4 (folded state);

[0032] In the figure:

[0033] 1. First connecting seat; 2. Second connecting seat; 3. Support seat; 4. Assembly groove; 5. Cam; 6. Limiting groove;

[0034] 7. Teeth; 8. Flexible seating surface;

[0035] 11. First limiting tooth; 12. First mounting portion; 13. First connecting portion;

[0036] 21. Second limiting tooth; 22. Second mounting portion; 23. Second connecting portion;

[0037] 31. Mounting slot; 32. Limiting portion. DETAILED DESCRIPTION

[0038] In the present invention, the terms "first", "second", "third", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance.

[0039] See also Figure 1-Figure 13As shown, a folding chair frame of the utility model includes a support seat 3 and a plurality of first connecting seats 1 and a plurality of second connecting seats 2 hinged on the support seat 3, the plurality of first connecting seats 1 and the plurality of second connecting seats 2 can be rotated around the first direction or the second direction relative to the support seat 3 to be in a folded state or an unfolded state; an angle limiting structure is provided between the first connecting seat 1, the second connecting seat 2, or the first connecting seat 1 and the second connecting seat 2, the angle limiting structure is used to limit the second connecting seat 2 from rotating around the first direction when the first connecting seat 1 and the second connecting seat 2 are in the unfolded state, and to release the restriction on the second connecting seat 2 from rotating around the first direction when the first connecting seat 1 rotates.

[0040] Specifically, the angle limiting structure includes an assembly groove 4 and a cam 5. The assembly groove 4 is provided in one of the first connection seat 1 and the second connection seat 2 and a limiting groove 6 is provided on its side wall. The cam 5 is provided in the other of the first connection seat 1 and the second connection seat 2 and is provided with a tooth portion 7. The cam 5 is rotatably embedded in the assembly groove 4, and the tooth portion 7 is limited in the limiting groove 6. The limiting groove 6 extends circumferentially along the assembly groove 4, and the tooth portion 7 is slidably connected in the limiting groove 6. When the first connection seat 1 rotates around the second direction to the unfolded state, the tooth portion 7 is clamped at one end (defined as end a) of the limiting groove 6 to limit the second connection seat 2 from rotating around the first direction, and when the first connection seat 1 rotates around the first direction to the folded state, the tooth portion 7 is clamped at the other end (defined as end b) of the limiting groove 6.

[0041] The limiting groove 6 is specifically provided on the first connecting seat 1, and the tooth portion 7 is specifically provided on the second connecting seat 2, but it is not limited thereto. The number of the limiting groove 6 and the tooth portion 7 is correspondingly set, and can be one or more. In this embodiment, the number of the limiting groove 6 and the tooth portion 7 is one respectively. Accordingly, the first direction is specifically a counterclockwise folding direction, and the second direction is specifically a clockwise unfolding direction.

[0042] Specifically, when the first connection seat 1 and the second connection seat 2 are in the folded state, if the first connection seat 1 is unfolded clockwise around the second direction, the b end of the limiting groove 6 of the first connection seat 1 and the tooth portion 7 of the second connection seat 2 are separated and moved away, and at the same time, the a end of the limiting groove 6 of the first connection seat 1 and the tooth portion 7 of the second connection seat 2 gradually approach each other. When the two are in conflict, the second connection seat 2 is unfolded clockwise around the second direction with the first connection seat 1 to achieve linkage in the unfolding direction. At the same time, it can be avoided that the second connection seat 2 automatically rotates counterclockwise around the first direction under the action of its own weight when unfolding, thereby maintaining the unfolded state and improving the stability when unfolding.

[0043] In addition, when the first connection seat 1 and the second connection seat 2 are in the unfolded state, the first connection seat 1 is controlled to fold counterclockwise around the first direction, thereby improving the convenience of folding while ensuring safety. Specifically, when the first connection seat 1 is rotated and folded counterclockwise around the first direction, the restriction on the second connection seat 2 rotating and folding counterclockwise around the first direction is released, that is, the a end of the limiting groove 6 of the first connection seat 1 is disengaged and moved away from the tooth portion 7 of the second connection seat 2, and at the same time, the b end of the limiting groove 6 of the first connection seat 1 is gradually approached to the tooth portion 7 of the second connection seat 2. When the two are in conflict, the second connection seat 2 is folded counterclockwise around the second direction with the first connection seat 1 to achieve linkage in the folding direction (regardless of the restriction of the ground on the first connection seat 1 and the second connection seat 2, or the folding chair frame needs to be off the ground when the second connection seat 2 is folded).

[0044] See also Figures 1 to 4 As shown, the support seat 3 is provided with a plurality of mounting grooves 31 and a limiting portion 32. The plurality of mounting grooves 31 are distributed at intervals along the circumference of the support seat 3. The first connecting seat 1 and the second connecting seat 2 are hinged between two opposite sides of the corresponding mounting grooves 31. The limiting portion 32 is arranged between the tops of the mounting grooves 31.

[0045] See also Figures 5 to 10 As shown, the rotation axis of the first connecting seat 1 coincides with the rotation axis of the second connecting seat 2;

[0046] The first connecting seat 1 includes a first limiting tooth 11, a first mounting portion 12 provided with an assembly groove 4, and a first connecting portion 13 fixed on the first mounting portion 12 and connected to the seat rod or the back rod; the second connecting seat 2 includes a second limiting tooth 21, a second mounting portion 22 provided with a cam 5, and a second connecting portion 23 fixed on the second mounting portion 22 and connected to the foot rod.

[0047] Specifically, the first limiting tooth 11 and the second limiting tooth 21 are respectively protruded on the first mounting portion 12 and the second mounting portion 22; when the first connecting seat 1 and the second connecting seat 2 are in the unfolded state, the first limiting tooth 11 and the second limiting tooth 21 respectively abut against the limiting portion 32 provided on the supporting seat 3 to limit the first connecting seat 1 and the second connecting seat 2 from rotating around the second direction.

[0048] See also Figures 11 to 13 As shown, the seat rod or back rod connected to the first connecting seat 1 and the foot rod connected to the second connecting seat 2 are staggered with each other, and the opposite ends of the seat rod or back rod and the foot rod fit together. Compared with the overlapping arrangement of the seat rod or back rod and the foot rod, this structure is easier to manufacture and helps to reduce costs.

[0049] In this embodiment, the number of the first connecting sockets 1 and the number of the second connecting sockets 2 are four respectively, and they are arranged opposite to each other in pairs.

[0050] In order to prevent the folding chair frame from tipping backwards during use and improve the safety and comfort of use, when the first connecting seat 1 is unfolded, the first angle between the first connecting seat 1 connecting the back rod and the support seat 3 should be smaller than the second angle between the first connecting seat 1 connecting the seat rod and the support seat 3, so that the angle between the first limiting tooth 11 of the first connecting seat 1 connecting the back rod and the first connecting portion 13 should be smaller than the other angle between the first limiting tooth 11 of the first connecting seat 1 connecting the seat rod and the first connecting portion 13. The first connecting seat 1 connecting the two back rods is located at the rear side of the first connecting seat 1 connecting the two seat rods, and the length of the back rod is greater than the length of the seat rod; the seat rod and the back rod are telescopic rods with self-locking function, so that they can be extended or shortened.

[0051] The utility model further provides a folding chair, including a flexible seat surface 8 and the folding chair frame, wherein the ends of the seat rods or back rods connected to the first connecting seats 1 away from the second connecting seats 2 are respectively connected to the flexible seat surface 8, so that in the unfolded state, the flexible seat surface 8 restricts the first connecting seats 1 from rotating in the second direction relative to the support seat 3.

[0052] Combination Figures 1 to 13 The use of the folding chair frame is as follows: When folding, Fig.11 As shown in FIG. 1 , first shorten the length of the seat rod or back rod of each first connecting seat 1, and then lift the folding chair frame off the ground. Fig.12 As shown in the following figure, the first connecting seat 1 is rotated around the first direction, and the second connecting seat 2 is unlocked at this time. The second connecting seat 2 rotates around the first direction under the action of its own weight and the linkage of the first connecting seat 1. Fig.13 When unfolding, first pull the foot rod of each second connection seat 2 to rotate in the second direction and stably support it on the ground, then pull the seat rod or back rod of each first connection seat 1 to rotate in the second direction and extend its length to complete the unfolding (such as Figure 1 ).

[0053] Combination Figure 2 The method of using the folding chair is as follows: compared with the folding chair frame, the flexible seat surface 8 of the folding chair provides tensioning force to limit the rotation of each first connecting seat 1 around the second direction. When folding or unfolding, the flexible seat surface 8 should be removed first or installed last, and the rest can be used according to the unfolding or folding method of the folding chair frame.

[0054] The utility model provides a folding chair frame and a folding chair thereof, and the unrelated parts are the same as the prior art or can be implemented by adopting the prior art.

[0055] The above embodiments are only used to further illustrate a folding chair frame and a folding chair thereof of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A folding chair frame, comprising a support base and a plurality of first connecting bases and a plurality of second connecting bases hinged on the support base, wherein the plurality of first connecting bases and the plurality of second connecting bases can rotate relative to the support base in a first direction or a second direction to be in a folded state or an unfolded state, characterized in that: An angle limiting structure is provided between the first connecting seat and the second connecting seat, and the angle limiting structure is used to limit the second connecting seat from rotating around a first direction when the first connecting seat and the second connecting seat are in an unfolded state, and to release the restriction on the second connecting seat from rotating around the first direction when the first connecting seat rotates.

2. A folding chair frame according to claim 1, characterized in that: The angle limiting structure includes an assembly groove and a cam. The assembly groove is arranged in one of the first connecting seat and the second connecting seat and a limiting groove is arranged on its side wall. The cam is arranged in the other of the first connecting seat and the second connecting seat and is provided with a tooth portion. The cam can be rotatably embedded in the assembly groove, and the tooth portion is limited in the limiting groove.

3. A folding chair frame according to claim 2, characterized in that: The rotation axis of the first connecting seat coincides with the rotation axis of the second connecting seat; the limiting groove extends circumferentially along the assembly groove, the tooth portion is slidably connected in the limiting groove, and when the first connecting seat rotates around the second direction to an unfolded state, the tooth portion is clamped at one end of the limiting groove to limit the second connecting seat from rotating around the first direction.

4. The folding chair frame according to claim 2, characterized in that: The support seat is provided with a plurality of mounting grooves and limiting portions, wherein the plurality of mounting grooves are spaced apart along the circumference of the support seat, the first connecting seat and the second connecting seat are hinged between two opposite sides of the corresponding mounting grooves, and the limiting portions are arranged between the tops of the mounting grooves.

5. The folding chair frame according to claim 4, characterized in that: The first connecting seat includes a first limiting tooth, a first mounting portion provided with the assembly groove, and a first connecting portion fixed on the first mounting portion and connected to the seat rod or the back rod, and the second connecting seat includes a second limiting tooth, a second mounting portion provided with the cam, and a second connecting portion fixed on the second mounting portion and connected to the foot rod.

6. The folding chair frame according to claim 5, characterized in that: The first limiting tooth and the second limiting tooth are respectively protruded on the first mounting portion and the second mounting portion; when the first connecting seat and the second connecting seat are in the unfolded state, the first limiting tooth and the second limiting tooth respectively abut against the limiting portion provided on the supporting seat to limit the first connecting seat and the second connecting seat from rotating around the second direction.

7. The folding chair frame according to claim 1, characterized in that: The seat rod or back rod connected to the first connecting seat and the foot rod connected to the second connecting seat are staggered with each other, and the opposite ends of the seat rod or back rod and the foot rod are in contact with each other.

8. The folding chair frame according to claim 1, characterized in that: The number of the first connecting seats and the second connecting seats are four respectively and they are arranged opposite to each other in pairs; the first connecting seats connecting the two back rods are located at the rear side of the first connecting seats connecting the two seat rods, and the length of the back rod is greater than the length of the seat rod; the seat rod and the back rod are telescopic rods with self-locking function, so that they can be extended or shortened.

9. The folding chair frame according to claim 1, characterized in that: When the first connecting seat is unfolded, a first angle and a second angle greater than the first angle are formed between the first connecting seat connected to the back rod and the first connecting seat connected to the seat rod and the supporting seat respectively.

10. A folding chair, comprising a flexible seat, characterized in that: It also includes a folding chair frame as described in any one of claims 1 to 9, wherein the end of the seat rod or back rod connected to each first connecting seat away from the second connecting seat is respectively connected to a flexible seat surface, so that in the unfolded state, the flexible seat surface limits the rotation of each first connecting seat in the second direction relative to the support seat.

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