Folding seat framework and folding seat

Abstract

The invention relates to a folding seat framework and a folding seat, the folding seat framework comprises a cross rod assembly and an umbrella rib assembly, the cross rod assembly comprises a left sleeve, a right sleeve and a connecting piece, the left sleeve and the right sleeve are arranged left and right relative to the connecting piece, and the left sleeve and / or the right sleeve are / is rotationally connected with the connecting piece; the two umbrella rib assemblies are connected with the left sleeve and the right sleeve respectively, and the umbrella rib assemblies are provided with two supporting legs and two chair face supporting rods. The outer end of the supporting leg is located between the centers of the umbrella rib assembly and the cross rod assembly on the other side and / or the outer end of the chair face supporting rod is located between the centers of the umbrella rib assembly and the cross rod assembly on the other side. The folding seat framework and the folding seat have the following advantages that due to the split design of the left sleeve and the right sleeve, the two sides of the left sleeve and the right sleeve can rotate relatively, the supporting legs and the seat supporting rods on the two sides can be partially overlapped in the length direction, the overall size is smaller, and carrying and storage are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of seats, and in particular to a folding seat frame and a folding seat. Background Art

[0002] With the rapid development of my country's national economy and the improvement of people's living standards, more and more people are using their spare time to travel, camp in the wild, or go to the beach to play in the waves. No matter what form, people sit in a chair to rest after entertainment, so it has become necessary to combine entertainment and leisure.

[0003] In the prior art, for example, Chinese utility model patent announcement number CN204862086U discloses an umbrella-type folding chair, including a soft seat, supporting legs, and a main rod, wherein the supporting legs are hinged to the bottom of the main rod; the main rod is a hollow structure, a connecting rod is installed inside the main rod, and a vertical through slot is provided on the main rod relative to the upper end of the connecting rod, the seat support rod is hinged to the connecting rod, one end of the seat support connecting rod is hinged to the seat support rod, and the other end is hinged to the main rod; one end of the supporting leg connecting rod is hinged to the supporting leg, and the other end is hinged to the lower end of the connecting rod; the soft seat is fixedly connected to the seat support rod. However, after the folding chair is folded, a gap needs to be left between the seat support rod and the supporting legs, otherwise they will collide and interfere with each other, which limits the volume after folding, and the space occupied is still large, which is not conducive to storage. Summary of the invention

[0004] An object of the present application is to provide a folding seat frame and a folding seat, which can reduce the space occupied after folding.

[0005] The technical solution adopted in the present application is: a folding seat frame, including a cross bar assembly and two symmetrically arranged rib assemblies, the cross bar assembly including a left sleeve, a right sleeve and a connecting piece, the left sleeve and the right sleeve are arranged left and right relative to the connecting piece, and the left sleeve and / or the right sleeve are rotatably connected to the connecting piece; the two rib assemblies are respectively connected to the left sleeve and the right sleeve, and the rib assembly is provided with at least two support legs and at least two seat support rods. In a folded state, the support legs on both sides are staggered in the circumferential direction of the left sleeve or the circumferential direction of the right sleeve, and the seat support rods on both sides are staggered in the circumferential direction of the left sleeve or the circumferential direction of the right sleeve, and the outer ends of the support legs are located between the centers of the rib assembly and the cross bar assembly on the other side and / or the outer ends of the seat support rods are located between the centers of the rib assembly and the cross bar assembly on the other side.

[0006] Compared with the prior art, the advantages of the present application are that the left and right sleeves are arranged horizontally, so that the lateral distance between the support legs on both sides is longer and the support is better. The seat support rods are arranged on both sides, so that the middle part of the seat is supported by pure cloth, the user feels more comfortable sitting and fits the user's buttocks more closely. When the seat support rods are accidentally folded, the user sits on the left and right sleeves, which is not easy to get injured and has high safety. The design of the rib assembly enables the support legs and the seat support rods to be unfolded and folded like an umbrella, which is convenient for carrying and using. The split design of the left and right sleeves enables the two sides to rotate relative to each other, so that the support legs and the seat support rod on the left side can be staggered with the support legs and the seat support rod on the right side. When folding, the support legs and the seat support rod on both sides will not collide and interfere with each other, and the support legs and the seat support rod on both sides can partially overlap in the length direction. Compared with the folding chair that cannot be dislocated, the required distance between the support legs and the seat support rods on both sides is reduced after dislocation, and the overall volume is smaller, which is more convenient to carry and store.

[0007] In some embodiments of the present application, the left sleeve is provided with a first rotation groove, the first rotation groove is arranged along the circumference of the left sleeve, and the connecting member is provided with a first limit member that cooperates with the first rotation groove, one end of the first limit member is located on the first rotation groove, and the other end is connected to the connecting member.

[0008] In some embodiments of the present application, the right sleeve is provided with a second rotation groove, the second rotation groove is arranged along the circumference of the right sleeve, and the connecting member is provided with a second limit member that cooperates with the second rotation groove, one end of the second limit member is located on the second rotation groove, and the other end is connected to the connecting member.

[0009] In some embodiments of the present application, the connecting member, the left sleeve and the right sleeve are all round tubes, the left sleeve is sleeved on the connecting member, and the right sleeve is sleeved on the connecting member; the diameter of the left sleeve is the same as the diameter of the right sleeve, and the right end face of the left sleeve is in contact with the left end face of the right sleeve.

[0010] Furthermore, the left sleeve and the right sleeve are on the same straight line; plugs are provided at both ends of the connecting piece; and the left sleeve and the right sleeve are symmetrically arranged relative to the connecting piece.

[0011] In some embodiments of the present application, the umbrella rib assembly includes a sliding seat and a fixed seat, the fixed seats on both sides are fixedly connected to the left sleeve and the right sleeve respectively, the sliding seats on both sides are slidably connected to the left sleeve and the right sleeve respectively, the support legs are connected to the sliding seat and the fixed seat respectively, the seat support rods are connected to the sliding seat and the fixed seat respectively, and the sliding seat is used to drive the support legs and the seat support rods to unfold or fold.

[0012] Furthermore, the umbrella rib assembly includes a first umbrella rib and a second umbrella rib, the first umbrella rib is used to support the support leg, and the second umbrella rib is used to support the seat support rod.

[0013] Furthermore, the two ends of the first rib are respectively hinged to the sliding seat and the supporting leg, and the two ends of the second rib are respectively hinged to the sliding seat and the seat support rod; the supporting leg is hinged to the fixed seat, and the seat support rod is hinged to the fixed seat.

[0014] Furthermore, a locking assembly is provided on the sliding seat, which is used to lock the supporting legs and the seat support rod with the left sleeve or the right sleeve after they are fully deployed; an elastic member is provided between the sliding seat and the fixed seat, which is used to drive the sliding seat away from the fixed seat.

[0015] A folding seat comprises the above-mentioned folding seat frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0017] Figure 2 is a cross-sectional view of embodiment 1 of the present invention;

[0018] Figure 3 is a bottom view of embodiment 1 of the present invention;

[0019] Figure 4 is a schematic structural diagram of a folded state of embodiment 1 of the present invention;

[0020] Figure 5 yes Figure 2 Enlarged view of part A in .

[0021] In the figure: 1, cross bar assembly; 2, rib assembly; 3, left sleeve; 4, right sleeve; 5, connecting piece; 6, supporting leg; 7, seat support rod; 8, first rotating groove; 9, first limiting piece; 10, second rotating groove; 11, second limiting piece; 12, plug; 13, sliding seat; 14, fixed seat; 15, first rib; 16, second rib; 18, elastic piece; 19, locking piece; 20, unlocking piece; 21, mounting groove; 22, sleeve groove. DETAILED DESCRIPTION

[0022] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0023] Embodiment 1:

[0024] This embodiment provides a folding seat frame, such as Figure 1 , Figure 2 , Figure 4As shown, it includes a crossbar assembly 1 and two symmetrically arranged umbrella rib assemblies 2, the crossbar assembly 1 includes a left sleeve 3, a right sleeve 4 and a connecting piece 5, the left sleeve 3 and the right sleeve 4 are arranged left and right relative to the connecting piece 5, and the left sleeve 3 and / or the right sleeve 4 are rotatably connected to the connecting piece 5; the two umbrella rib assemblies 2 are respectively connected to the left sleeve 3 and the right sleeve 4, and the umbrella rib assembly 2 is provided with at least two supporting legs 6 and at least two seat support rods 7, and the supporting legs 6 and the seat support rods 7 can be folded or unfolded. In the folded state, The support legs 6 on both sides are arranged in a staggered manner on the circumference of the left sleeve 3 or the circumference of the right sleeve 4, and the seat support rods 7 on both sides are arranged in a staggered manner on the circumference of the left sleeve 3 or the circumference of the right sleeve 4. The outer ends of the support legs 6 are located between the centers of the rib assembly 2 and the crossbar assembly 1 on the other side and / or the outer ends of the seat support rods 7 are located between the centers of the rib assembly 2 and the crossbar assembly 1 on the other side. The outer ends of the support legs 6 face the rib assembly 2 on the other side, and the outer ends of the seat support rods 7 face the rib assembly 2 on the other side. In this embodiment, the left sleeve 3 and the right sleeve 4 are both rotatably connected to the connecting member 5; the rib assembly 2 is provided with two support legs 6 and two seat support rods 7; the support legs 6 on both sides are arranged in a staggered manner on the circumference of the left sleeve 3, and the seat support rods 7 on both sides are arranged in a staggered manner on the circumference of the left sleeve 3; the outer ends of the support legs 6 are located between the centers of the rib assembly 2 and the crossbar assembly 1 on the other side, and the outer ends of the seat support rods 7 are located between the centers of the rib assembly 2 and the crossbar assembly 1 on the other side. Of course, the left sleeve 3 can be rotatably connected to the connecting member 5, and the right sleeve 4 can be fixedly connected to the connecting member 5, or the right sleeve 4 can be rotatably connected to the connecting member 5, and the left sleeve 3 can be fixedly connected to the connecting member 5. These can achieve the function of mutual dislocation of the support legs 6 and the seat support rod 7 on both sides; the outer end of the support leg 6 is located between the center of the umbrella rib assembly 2 and the cross bar assembly 1 on the other side, or the outer end of the seat support rod 7 is located between the center of the umbrella rib assembly 2 and the cross bar assembly 1 on the other side. Any one of them can also achieve the purpose of reducing the overall volume after folding.

[0025] The left sleeve 3 and the right sleeve 4 are arranged horizontally, so that the horizontal distance between the support legs 6 on both sides is longer and the support is better. The seat support rods 7 are arranged on both sides, so that the middle part of the seat is supported by pure cloth, the user feels more comfortable sitting, and it fits the user's buttocks more closely. When the seat support rod 7 is accidentally folded, the user sits on the left sleeve 3 and the right sleeve 4, which is not easy to get injured and has high safety. The design of the rib assembly 2 enables the support legs 6 and the seat support rod 7 to be unfolded and folded like an umbrella, which is convenient for carrying and using. The split design of the left sleeve 3 and the right sleeve 4 enables the two sides to rotate relative to each other, so that the support legs 6 and the seat support rod 7 on the left side can be staggered with the support legs 6 and the seat support rod 7 on the right side. When folding, the support legs 6 and the seat support rod 7 on both sides will not collide and interfere with each other, and the support legs 6 and the seat support rod 7 on both sides can partially overlap in the length direction. Compared with the folding chair that cannot be dislocated, the required distance between the support legs 6 on both sides and the seat support rod 7 on both sides is reduced after dislocation, and the overall volume is smaller, which is more convenient to carry and store.

[0026] In order to ensure the reliable rotation of the left sleeve 3, Figure 3 As shown, the left sleeve 3 is provided with a first rotation groove 8, and the first rotation groove 8 is arranged along the circumference of the left sleeve 3. The connecting member 5 is provided with a first limiter 9 that cooperates with the first rotation groove 8. One end of the first limiter 9 is located on the first rotation groove 8, and the other end is connected to the connecting member 5. In this embodiment, the first limiter 9 is a cylinder. The first rotation groove 8 cooperates with the first limiter 9 to limit the rotation angle of the left sleeve 3, which is convenient for the user's rotation operation, and prevents the rotation from exceeding the range, ensuring that the support legs 6 and the seat support rod 7 on both sides can be staggered after the rotation; the first rotation groove 8 is arranged circumferentially, which can ensure the reliable circumferential rotation of the left sleeve 3. The part of the first limiter 9 is in the first rotation groove 8, which can prevent the left sleeve 3 from falling out.

[0027] In order to ensure the reliable rotation of the right sleeve 4, a second rotation groove 10 is provided on the right sleeve 4. The second rotation groove 10 is arranged along the circumference of the right sleeve 4. A second limiter 11 cooperating with the second rotation groove 10 is provided on the connecting member 5. One end of the second limiter 11 is located on the second rotation groove 10, and the other end is connected to the connecting member 5. In this embodiment, the second limiter 11 is a cylinder. The second rotation groove 10 cooperates with the second limiter 11 to limit the rotation angle of the right sleeve 4, which is convenient for the user's rotation operation, and prevents the rotation from exceeding the range, ensuring that the support legs 6 and the seat support rod 7 on both sides can be staggered after the rotation; the second rotation groove 10 is arranged circumferentially, which can ensure the reliable circumferential rotation of the right sleeve 4. The part of the second limiter 11 is in the second rotation groove 10, which can prevent the right sleeve 4 from falling out.

[0028] When the left sleeve 3 alone rotates, the first rotation groove 8 is provided on the left sleeve 3, and the second rotation groove 10 is not provided on the right sleeve 4; when the right sleeve 4 alone rotates, the second rotation groove 10 is provided on the right sleeve 4, and the first rotation groove 8 is not provided on the left sleeve 3; in this embodiment, the first rotation groove 8 of the left sleeve 3 and the second rotation groove 10 of the right sleeve 4 are arranged at the same time, so that the left sleeve 3 and the right sleeve 4 can rotate at the same time, so that the structures of the left sleeve 3 and the right sleeve 4 are the same, which is convenient for processing and assembly.

[0029] In order to ensure reliable connection, the connector 5, the left sleeve 3 and the right sleeve 4 are all made of round tubes, which are easy to purchase and low in cost. The left sleeve 3 is sleeved on the connector 5, and the right sleeve 4 is sleeved on the connector 5. The sleeve design is convenient for assembly. The diameter of the left sleeve 3 is the same as that of the right sleeve 4. The right end face of the left sleeve 3 fits with the left end face of the right sleeve 4, so that the left sleeve 3 and the right sleeve 4 are a whole piece in overall appearance, with a simple appearance. The end faces of the left sleeve 3 and the right sleeve 4 fit together to prevent the user's fingers from getting stuck between the left sleeve 3 and the right sleeve 4, thereby improving safety. Of course, the connector 5 can also be made of a solid cylinder to improve structural strength.

[0030] For the sake of simplicity in appearance, the left sleeve 3 and the right sleeve 4 are in the same straight line, with beautiful appearance and good structural strength; plugs 12 are provided at both ends of the connecting piece 5, which improve the structural strength of both ends of the connecting piece 5, provide high supporting strength for the left sleeve 3 and the right sleeve 4, and prevent the middle part from bending due to force; the left sleeve 3 and the right sleeve 4 are symmetrically arranged relative to the connecting piece 5, and the force on both sides is balanced, thereby extending the service life.

[0031] In order to ensure the reliability of the umbrella rib assembly 2, the umbrella rib assembly 2 includes a sliding seat 13 and a fixed seat 14. The fixed seats 14 on both sides are fixedly connected to the left sleeve 3 and the right sleeve 4 respectively. The sliding seats 13 on both sides are slidably connected to the left sleeve 3 and the right sleeve 4 respectively. The support legs 6 are connected to the sliding seats 13 and the fixed seats 14 respectively. The seat support rod 7 is connected to the sliding seats 13 and the fixed seats 14 respectively. The sliding seat 13 is used to drive the support legs 6 and the seat support rod 7 to unfold or fold. In this embodiment, the sliding seats 13 on both sides are respectively sleeved on the left sleeve 3 and the right sleeve 4, and the fixed seats 14 on both sides are respectively sleeved on the left sleeve 3 and the right sleeve 4; the sliding seat 13 is located between the two fixed seats 14; the left sleeve 3 is fixedly connected to the left fixed seat 14, and the right sleeve 4 is fixedly connected to the right fixed seat 14, so that the rotation of the sleeve can drive the fixed seat 14 to rotate, thereby driving the support legs 6 and the seat support rod 7 to rotate.

[0032] In order to ensure the reliability of the umbrella rib assembly 2, the umbrella rib assembly 2 includes a first rib 15 and a second rib 16. The first rib 15 is used to support the support leg 6, and the first rib 15 can drive the support leg 6 to move. The second rib 16 is used to support the seat support rod 7, and the second rib 16 can drive the seat support rod 7 to move.

[0033] For reliable connection, the two ends of the first rib 15 are respectively hinged to the sliding seat 13 and the support leg 6, and the two ends of the second rib 16 are respectively hinged to the sliding seat 13 and the seat support rod 7; in the unfolded state, the end of the support leg 6 facing the left sleeve 3 or the right sleeve 4 is hinged to the fixed seat 14, and the end of the seat support rod 7 facing the left sleeve 3 or the right sleeve 4 is hinged to the fixed seat 14. When the support leg 6 and the seat support rod 7 are fully unfolded, the support leg 6 and the seat support rod 7 will fit with the fixed seat 14 to form a limit, so that the support leg 6 and the seat support rod 7 cannot be further unfolded, ensuring reliable unfolding. In this embodiment, a mounting groove 21 and a sleeve groove 22 are provided on the fixing seat 14, and one end of the support leg 6 and the seat support rod 7 are arranged in the mounting groove 21. When unfolded, the support leg 6 and the seat support rod 7 will fit with the bottom of the mounting groove 21 to form a limit. The end of the left sleeve 3 away from the connecting member 5 or the end of the right sleeve 4 away from the connecting member 5 is inserted into the sleeve groove 22, which is connected to the left sleeve 3 or the right sleeve 4, and the outside of the left sleeve 3 or the right sleeve 4 is blocked, which can reduce the entry of debris into the sleeve and extend the service life of the sleeve.

[0034] In order to ensure reliable deployment, the sliding seat 13 is provided with a locking assembly, which is used to lock the support leg 6 and the seat support rod 7 with the left sleeve 3 or the right sleeve 4 after the support leg 6 and the seat support rod 7 are deployed in place. Figure 5 As shown, the locking assembly includes a locking piece 19, which is arranged on the left sleeve 3 and the right sleeve 4. The locking piece 19 adopts a limiting bead, the top of the limiting bead is hemispherical, and a reset spring is arranged at the bottom of the limiting bead. When the sliding seat 13 with the support leg 6 and the seat support rod 7 is unfolded into place, the sliding seat 13 just passes through the top of the limiting bead. The limiting bead automatically pops up under the action of the reset spring, so that when the sliding seat 13 moves toward the center, it will abut against the side of the limiting bead, and the limiting bead plays a role in preventing the sliding seat 13 from moving.

[0035] In order to ensure reliable folding, an elastic member 18 is provided between the sliding seat 13 and the fixed seat 14. The elastic member 18 is used to drive the sliding seat 13 away from the fixed seat 14, that is, to drive the sliding seat 13 to move toward the center so as to restore the support leg 6 and the seat support rod 7 to the folded state. In this embodiment, the elastic member 18 is a spring, one end of the spring is in contact with the sliding seat 13, and the other end is in contact with the fixed seat 14. In the unfolded state, the spring is in a compressed state, and the spring drives the sliding seat 13 to move toward the folded state.

[0036] In order to release the limit of the sliding seat 13 with less effort, the locking assembly includes an unlocking member 20 for contacting the limit of the sliding seat 13. The unlocking member 20 is arranged on the sliding seat 13, and the unlocking member 20 cooperates with the locking member 19. In the unfolded state, the unlocking member 20 is located directly above the locking member 19. Pressing the unlocking member 20 downward can press the locking member 19 to release the movement limit of the sliding seat 13. In this embodiment, the unlocking member 20 is a button, and a reset spring is arranged in the button, and the reset spring is used to reset the button after it is pressed down.

[0037] In this embodiment, the locking assembly is arranged opposite to the first limit member 9, and the locking assembly is arranged opposite to the second limit member 11, so that the openings on the left sleeve 3 or the right sleeve 4 are located on two opposite sides, preventing the openings from being concentrated on one side, thereby preventing the structural strength of one side of the left sleeve 3 or the right sleeve 4 from being reduced.

[0038] In order to be more compact after folding, the support legs 6 and the seat support rods 7 can be telescopic, such as conventional telescopic sleeves, and can be locked with pins when fully extended, similar to the folding handle of a folding umbrella.

[0039] When folding, first rotate the left sleeve 3 and the right sleeve 4 to stagger the supporting legs 6 and the seat support rod 7 on both sides, and then press the unlocking piece 20 to release the lock of the sliding seat 13. The sliding seat 13 automatically moves toward the center of the connecting member 5 under the drive of the elastic member 18, and the sliding seat 13 drives the first umbrella rib 15 and the second umbrella rib 16 to move. The first umbrella rib 15 drives the supporting legs 6 to move, and the second umbrella rib 16 drives the seat support rod 7 to move. The first umbrella rib 15 limits the movement range of the supporting legs 6, and the second umbrella rib 16 limits the movement range of the seat support rod 7, so that under the drive of the sliding seat 13, the supporting legs 6 and the seat support rod 7 will fit toward the left sleeve 3 and the right sleeve 4, reducing the space occupation and completing the folding; when unfolding, it is only necessary to move the sliding seat 13 in the direction away from the center of the connecting member 5. Under the drive of the sliding seat 13, the first umbrella rib 15 will open the supporting legs 6 outward, and the second umbrella rib 16 will open the seat support rod 7 outward until the sliding seat 13 passes the locking piece 19 and completes the unfolding.

[0040] Embodiment 2:

[0041] A folding seat provided in this embodiment includes a folding seat frame as described in Embodiment 1.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A folding seat frame, characterized in that: The invention comprises a crossbar assembly (1) and two umbrella rib assemblies (2); the crossbar assembly (1) comprises a left sleeve (3), a right sleeve (4) and a connecting piece (5); the left sleeve (3) and the right sleeve (4) are arranged on the left and right sides of the connecting piece (5); the left sleeve (3) and / or the right sleeve (4) are rotatably connected to the connecting piece (5); the two umbrella rib assemblies (2) are respectively connected to the left sleeve (3) and the right sleeve (4); the umbrella rib assembly (2) is provided with at least two supporting legs (6) and at least two seat support legs (6). The rod (7) is arranged in a staggered manner on both sides of the support legs (6) in the circumferential direction of the left sleeve (3) or the circumferential direction of the right sleeve (4), and the seat support rods (7) on both sides are arranged in a staggered manner on the circumferential direction of the left sleeve (3) or the circumferential direction of the right sleeve (4), and the outer ends of the support legs (6) are located between the centers of the umbrella rib assembly (2) and the crossbar assembly (1) on the other side and / or the outer ends of the seat support rods (7) are located between the centers of the umbrella rib assembly (2) and the crossbar assembly (1) on the other side.

2. A folding seat frame according to claim 1, characterized in that: The left sleeve (3) is provided with a first rotation groove (8), which is arranged along the circumference of the left sleeve (3); the connecting member (5) is provided with a first stopper (9) which cooperates with the first rotation groove (8); one end of the first stopper (9) is located on the first rotation groove (8), and the other end is connected to the connecting member (5).

3. A folding seat frame according to claim 1, characterized in that: The right sleeve (4) is provided with a second rotation groove (10), and the second rotation groove (10) is arranged along the circumference of the right sleeve (4). The connecting member (5) is provided with a second stopper (11) matched with the second rotation groove (10), and one end of the second stopper (11) is located on the second rotation groove (10), and the other end is connected to the connecting member (5).

4. A folding seat frame according to claim 1, characterized in that: The connecting piece (5), the left sleeve (3) and the right sleeve (4) are all made of round tubes. The left sleeve (3) is sleeved on the connecting piece (5), and the right sleeve (4) is sleeved on the connecting piece (5). The diameter of the left sleeve (3) is the same as that of the right sleeve (4), and the right end surface of the left sleeve (3) is in contact with the left end surface of the right sleeve (4).

5. A folding seat frame according to claim 4, characterized in that: The left sleeve (3) and the right sleeve (4) are located on the same straight line; plugs (12) are provided at both ends of the connecting piece (5); and the left sleeve (3) and the right sleeve (4) are symmetrically arranged relative to the connecting piece (5).

6. A folding seat frame according to claim 1, characterized in that: The umbrella rib assembly (2) comprises a sliding seat (13) and a fixed seat (14); the fixed seats (14) on both sides are fixedly connected to the left sleeve (3) and the right sleeve (4) respectively; the sliding seats (13) on both sides are slidably connected to the left sleeve (3) and the right sleeve (4) respectively; the support legs (6) are connected to the sliding seat (13) and the fixed seat (14) respectively; the seat support rod (7) is connected to the sliding seat (13) and the fixed seat (14) respectively; the sliding seat (13) is used to drive the support legs (6) and the seat support rod (7) to unfold or fold.

7. A folding seat frame according to claim 6, characterized in that: The umbrella rib assembly (2) comprises a first umbrella rib (15) and a second umbrella rib (16); the first umbrella rib (15) is used to support the supporting leg (6), and the second umbrella rib (16) is used to support the seat support rod (7).

8. A folding seat frame according to claim 7, characterized in that: The two ends of the first rib (15) are respectively hinged to the sliding seat (13) and the supporting leg (6); the two ends of the second rib (16) are respectively hinged to the sliding seat (13) and the seat support rod (7); the supporting leg (6) is hinged to the fixed seat (14); and the seat support rod (7) is hinged to the fixed seat (14).

9. A folding seat frame according to claim 8, characterized in that: The sliding seat (13) is provided with a locking assembly, which is used to lock the supporting legs (6) and the seat support rod (7) with the left sleeve (3) or the right sleeve (4) after they are unfolded into place; an elastic member (18) is provided between the sliding seat (13) and the fixed seat (14), and the elastic member (18) is used to drive the sliding seat (13) away from the fixed seat (14).

10. A folding seat, characterized by: It comprises a folding seat frame as claimed in any one of claims 1 to 9.

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