A folding chair frame and a folding chair

Abstract

This invention discloses a folding chair support, including a rear support base, a left front support base and a right front support base symmetrically arranged on one side of the rear support base, and a folding locking assembly. A left connecting rod and a right connecting rod are hinged to the rear support base, and the left and right connecting rods are respectively connected to the left and right front support bases. Support rods and support feet are detachably inserted into the upper and lower ends of the rear support base, the left front support base, and the right front support base. A front connecting rod is hinged to the left front support base. A connecting recess for accommodating the front connecting rod is provided on the side of the right front support base opposite to the left front support base. The folding locking assembly is disposed on the right front support base and has a locked state and an unlocked state. In the locked state, the folding locking assembly can lock and fix the front connecting rod in the connecting recess of the right front support base. In the unlocked state, the front connecting rod can be displaced from the connecting recess. A folding chair is also disclosed.

Description

Technical Field

[0001] This invention relates to the field of outdoor equipment technology, and more specifically to a folding chair bracket and a folding chair. Background Technology

[0002] Folding chairs are popular for outdoor activities such as camping, beach recreation, and sporting events due to their lightweight and portability. Traditional folding chairs often use a quadrilateral structure as the main support structure, connecting the various parts with elastic cords, and controlling the folding and unfolding of the chair under the action of elasticity. However, the quadrilateral structure has poor stability and is unstable during use, posing a safety hazard.

[0003] To address the aforementioned issues, utility model patent CN218127667U discloses a novel automatic folding chair. The chair frame includes an automatic folding assembly, a rear support seat, and two symmetrically arranged front support seats. The telescopic rod in the automatic folding assembly is an elastic rod capable of axial extension under external force or its own internal force, and axial contraction under its own internal force or external force. A self-locking element is provided on the telescopic rod. In the locked state, the self-locking element restricts the telescopic rod from extending or retracting; in the unlocked state, the telescopic rod can actively extend or retract to fold and store the chair.

[0004] The aforementioned new automatic folding chair has a triangular structure formed by the rear support seat and two front support seats, which has good stability. However, in order to make it foldable, a telescopic rod and an adapter are added, making the structure more complicated. Folding and unfolding operations are also more complicated. In addition, the self-locking device is located on the upper side of the telescopic rod. If the weight is too great when people sit down, they may accidentally touch the upper self-locking device to unlock it, which poses a safety hazard. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a folding chair bracket that is simple in structure, easy to use and safe.

[0006] Another technical problem to be solved by the present invention is to provide a folding chair that is simple in structure, easy to use and safe.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, a folding chair bracket is provided, comprising a rear support base, a left front support base and a right front support base symmetrically arranged on one side of the rear support base, and a folding locking assembly. A left connecting rod and a right connecting rod are hinged to the rear support base, and the left and right connecting rods are respectively connected to the left front support base and the right front support base. The upper and lower ends of the rear support base, the left front support base, and the right front support base are respectively detachably connected to support rods and support feet. A front connecting rod is hinged to the left front support base. A connecting recess for accommodating the front connecting rod is provided on the side of the right front support base opposite to the left front support base. The folding locking assembly is disposed on the right front support base and has a locked state and an unlocked state. In the locked state, the folding locking assembly can lock and fix the front connecting rod in the connecting recess of the right front support base. In the unlocked state, the front connecting rod can be displaced out of the connecting recess.

[0008] The further technical solution is as follows: a through hole is provided on the front connecting rod, and the folding locking assembly includes a locking member and a pushing member. The locking member is located in the connecting recess, and the pushing member is located on one side of the right front support seat. One end of the pushing member passes through the right front support seat and is connected to the locking member, and can push the locking member to move up and down so that the locking member is engaged in the through hole / moved out of the through hole.

[0009] The further technical solution is as follows: the folding locking assembly also includes an elastic element, which is connected to the inner wall of the locking element and the connecting recess, so as to be compressed when the pushing element pushes the locking element to move upward, and the locking element can be quickly inserted into the through hole under the action of elastic force.

[0010] A further technical solution is as follows: the locking member has an outwardly protruding protrusion, the pushing member includes a button and a push rod, the push rod includes an abutting rod located below the protrusion, a connecting rod connected to the button, and a transition rod connecting the abutting rod and the connecting rod, the top surface of the transition rod is inclined, so that the locking member moves upward when the button is pushed towards the locking member.

[0011] The further technical solution is as follows: the top of the right front support seat is recessed inward to form an accommodating cavity, and the folding locking assembly also includes a guide member. The guide member includes a cover plate and a hollow guide post extending downward from the middle of the cover plate. The cover plate covers the top of the accommodating cavity, and the guide post passes through the accommodating cavity and is located in the connecting recess. A sliding groove is provided on the side wall of the guide post, and the protruding rod is located in the sliding groove and can move in the sliding groove to drive the locking member to move up and down in the guide post.

[0012] The further technical solution is as follows: a first protrusion is formed on the cavity wall of the accommodating cavity, and the guide also includes side plates formed on both sides of the cover plate. Each side plate has a second protrusion that cooperates with the first protrusion to fix the guide to the right front support.

[0013] The further technical solution is as follows: the locking component includes a fixed cylinder and a fixed pin located inside the fixed cylinder. The fixed cylinder is fixed to the top of the right front support seat, and a groove is opened on one side of the fixed cylinder. The pushing component includes a button and a lifting component. The lifting component includes a pushing rod and a lifting rod formed by bending downward from the upper end of one side of the pushing rod. The upper end face of the other side of the pushing rod is inclined. The lifting rod passes through the fixed pin and is located in the groove. The pushing rod is located outside the fixed cylinder. The button is located above the fixed pin. The elastic component is located inside the button, with one end connected to the button and the other end connected to the fixed pin. A push plate is provided inside the button corresponding to the pushing rod. The lower end of the push plate is set as an inclined surface so that when it moves downward under the action of external force, it cooperates with the pushing rod to make the lifting rod move upward in the groove, thereby driving the fixed pin to move upward.

[0014] A further technical solution is as follows: an outwardly protruding ring is formed on the upper part of the fixing pin, and the protruding ring is located above the fixing cylinder to limit the downward movement distance of the fixing pin.

[0015] The further technical solution is as follows: the front ends of the rear support seat are recessed inward to form a first rear chamber and a second rear chamber that are symmetrically arranged. The left connecting rod and the right connecting rod are located in the first rear chamber and the second rear chamber respectively, and are respectively hinged to the rear support seat through an assembly shaft. A left chamber is opened on the left front support seat. A third assembly hole is opened on the upper and lower sides of the left chamber. One end of the front connecting rod is located in the left chamber. A third assembly shaft passes through the third assembly hole located in the upper part of the left chamber, the front connecting rod and the third assembly hole located in the lower part in sequence, so that the front connecting rod is hinged to the left front support seat.

[0016] To solve the above-mentioned technical problems, according to another aspect of the present invention, a folding chair is provided, including a folding chair support as described above and a flexible seat surface connected to the upper part of the folding chair support. The flexible seat surface is provided with a plurality of connecting sleeves, and the connecting sleeves are sleeved on the support rod.

[0017] The beneficial technical effects of this invention are as follows: Compared with the prior art, in this invention, the rear support base and the left and right front support bases located on one side of the rear support base and symmetrically arranged are connected by a left connecting rod, a right connecting rod, and a front connecting rod to form a triangular structure, which provides stable support. One end of the front connecting rod is hinged to the left front support base, and the right front support base is provided with a folding locking assembly for locking the other end of the front connecting rod to or unlocking it from the right front support base. That is, in the locked state, the folding locking assembly can lock the front connecting rod in the connecting recess of the right front support base. One end of the folding chair support is locked in place, so that the folding chair support is in the unfolded state. In the unlocked state, the front connecting rod can be displaced from the connecting recess to achieve folding. It can be seen that when the folding chair support of the present invention is used, the front connecting rod can be locked in place by the folding locking component to realize the unfolding of the folding chair support. The front connecting rod can also be unlocked by the folding locking component to realize the folding and storage of the folding chair support. The structure is simple and easy to operate. Moreover, the folding locking component is located on the right front support base, so it is not easy to accidentally activate it during use, avoiding the safety hazard of the folding chair suddenly folding due to accidental activation. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the first embodiment of the folding chair bracket of the present invention.

[0019] Figure 2 yes Figure 1 The diagram shows the unfolding process of the folding chair support.

[0020] Figure 3 yes Figure 1 The diagram shows the structure of the folding chair frame after removing the support rods and support legs.

[0021] Figure 4 yes Figure 1 A partial structural exploded view of the right front support seat in the folding chair bracket shown.

[0022] Figure 5 yes Figure 1 An exploded view of the folding locking assembly in the folding chair support shown.

[0023] Figure 6 yes Figure 1 The exploded structural diagram of the rear support seat in the folding chair frame shown.

[0024] Figure 7 yes Figure 1 An exploded view of the left front support seat in the folding chair frame shown.

[0025] Figure 8 yes Figure 1 The diagram shows the folding chair support in a fully folded state.

[0026] Figure 9 This is a structural schematic diagram of the second embodiment of the folding chair bracket of the present invention.

[0027] Figure 10 yes Figure 9 The diagram shows the unfolding process of the folding chair support.

[0028] Figure 11 yes Figure 9 A partial structural exploded view of the right front support seat in the folding chair bracket shown.

[0029] Figure 12 yes Figure 9 The diagram shows a cross-sectional view of the folding locking assembly and the front linkage in the folding chair frame.

[0030] Figure 13 yes Figure 9 An exploded view of the folding locking assembly in the folding chair support shown.

[0031] Figure 14 This is a structural schematic diagram of a specific embodiment of the folding chair of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to more clearly understand the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Reference Figures 1 to 8 , Figures 1 to 8A first embodiment of the folding chair support 1 of the present invention is shown. In the embodiment shown in the figures, the folding chair support 1 includes a rear support base 12, a left front support base 13 and a right front support base 14 located on one side of the rear support base 12 and symmetrically arranged, and a folding locking assembly 18. A left connecting rod 15 and a right connecting rod 16 are hinged to the rear support base 12. The left connecting rod 15 and the right connecting rod 16 are rotatable in the horizontal direction. The left connecting rod 15 and the right connecting rod 16 are also connected to the left front support base 13 and the right front support base 14, respectively. The upper and lower ends of the rear support base 12, the left front support base 13, and the right front support base 14 are detachable. A support rod 10 and a support foot 11 are inserted into the left front support seat 13, and a front connecting rod 17 is hinged to the left front support seat 13. The right front support seat 14 is provided with a connecting recess 140 for accommodating the front connecting rod 17 on the side opposite to the left front support seat 13. The folding locking assembly 18 is disposed on the right front support seat 14 and has a locked state and an unlocked state. In the locked state, the folding locking assembly 18 can lock and fix the front connecting rod 17 in the connecting recess 140 of the right front support seat 14. In the unlocked state, the front connecting rod 17 can be moved out of the connecting recess 140. Based on the above design, the rear support 12 and the left front support 13 and right front support 14, which are located on one side of the rear support 12 and are symmetrically arranged, are connected by the left connecting rod 15, the right connecting rod 16 and the front connecting rod 17 to form a triangular structure, which provides stable support. One end of the front connecting rod 17 is hinged to the left front support 13, and the other end can be locked in the connecting recess 140 of the right front support 14 through the folding locking assembly 18 to form a triangular structure for stable support. It can also be unlocked from the right front support 14, moved out of the connecting recess 140 and moved towards the rear support 12. At the same time, the left connecting rod 15 and the right connecting rod 16 move towards each other to realize the folding and storage of the folding chair bracket 1.

[0034] In some embodiments, the front connecting rod 17 has a through hole 170a. The folding locking assembly 18 includes a locking member 180a and a pushing member 181a. The locking member 180a is located within the connecting recess 140, and the pushing member 181a is located on one side of the right front support 14. One end of the pushing member 181a passes through the right front support 14 and is connected to the locking member 180a, and can push the locking member 180a to move up and down. When the folding chair bracket 1 needs to be unfolded, the pushing member... 181a pushes the locking member 180a downward, causing the locking member 180a to engage with the through hole 170a, thus entering a locked state. This locks the front link 17 into the connecting recess 140 of the right front support seat 14. When folding and storing is required, the pusher 181a pushes the locking member 180a upward, causing the locking member 180a to move out of the through hole 170a, thus entering an unlocked state. This allows the front link 17 to be removed from the connecting recess 140.

[0035] Specifically, in this embodiment, the locking member 180a has two outwardly protruding protrusions 1800a on both sides, and the pushing member 181a includes a button 1811a and two push rods 1812a respectively connected to both sides of the button 1811a. The push rod 1812a includes an abutting rod 8121a located below the protrusions 1800a, a connecting rod 8123a connected to the button 1811a, and a transition rod 8124a connecting the abutting rod 8121a and the connecting rod 8123a. The top surface of the transition rod 8124a is inclined so that when the button 1811a is pushed toward the locking member 180a, the locking member 180a moves upward. Based on the above design, the locking member 180a is located between the two push rods 1812a. When the folding chair bracket 1 needs to be folded and stored, the button 1811a can be pushed, causing the button 1811a to move closer to the locking member 180a. The two push rods 1812a move closer to the locking member 180a, and the protrusion 1800a moves upward along the transition rod 8124a, thereby causing the locking member 180a to move upward and move out of the through hole 170a.

[0036] In some embodiments, the top of the right front support 14 is recessed inward to form a receiving cavity 141a. The folding locking assembly 18 further includes a guide member 183a. The guide member 183a includes a cover plate 1831a and a hollow guide post 1832a extending downward from the middle of the cover plate 1831a. The cover plate 1831a covers the top of the receiving cavity 141a. The guide post 1832a passes through the receiving cavity 141a and is located within the connecting recess 140. A sliding groove 8321a is formed on the side wall of the guide post 1832a. The protruding rod 1800a is located within the sliding groove 8321a and can move within the sliding groove 8321a to drive the locking member 180a to move up and down within the guide post 1832a. Based on the above design, the guide post 1832a can restrict the movement path of the locking member 180a.

[0037] Continue to refer to Figure 4 and Figure 5 In some embodiments, a first protrusion 8331a is formed on the cavity wall of the accommodating cavity 141a, and the guide member 183a further includes side plates 1833a formed on both sides of the cover plate 1831a. Each side plate 1833a has a second protrusion that cooperates with the first protrusion 8331a to fix the guide member 183a to the right front support seat 14.

[0038] Furthermore, in this embodiment, the folding locking assembly 18 further includes an elastic element 182a. The elastic element 182a is located inside the hollow guide post 1832a, and its two ends are connected to the locking element 180a and the cover plate 1831a, respectively. It is compressed when the pushing member 181a pushes the locking element 180a upward, and under the action of elastic force, the locking element 180a can quickly engage in the through hole 170a. Based on this design, when the pushing member 181a pushes the locking element 180a away from the through hole 170a to unlock, the elastic element 182a is compressed. When the front connecting rod 17 needs to be locked, it can quickly engage in the through hole 170a under the elastic force of the elastic element 182a.

[0039] Continue to refer to Figure 1 , Figure 3 and Figure 6 The rear support 12 has two recessed sections on its front end, forming a first rear chamber 120 and a second rear chamber 121 that are symmetrically arranged. The left connecting rod 15 and the right connecting rod 16 are located in the first rear chamber 120 and the second rear chamber 121, respectively, and are hinged to the rear support 12 via a first assembly shaft 1201 and a second assembly shaft 1211, respectively. That is, the first assembly shaft 1201 passes through the top of the rear support 12 and enters the first rear chamber 120, and passes through the left connecting rod 15 and the second rear chamber 1211. The bottom of the support base 12 is designed so that the left connecting rod 15 can rotate about the first assembly shaft 1201 within the range defined by the first rear chamber 120. The second assembly shaft 1211 passes through the top of the rear support base 12 and enters the second rear chamber 121, and passes through the right connecting rod 16 and the bottom of the rear support base 12, so that the right connecting rod 16 can rotate about the second assembly shaft 1211 within the range defined by the second rear chamber 121, thereby realizing the hinge connection between the left connecting rod 15 and the right connecting rod 16 and the rear support base 12.

[0040] Continue to refer to Figure 1 and Figure 7 In this embodiment, a left chamber 130 is provided on the left front support seat 13. A corresponding through third mounting hole 1300 is provided on the upper and lower sides of the left chamber 130. One end of the front connecting rod 17 is located in the left chamber 130. A third mounting shaft 1301 passes through the third mounting hole 1300 located in the upper part of the left chamber 130, the front connecting rod 17, and the third mounting hole 1300 located in the lower part in sequence, so that the front connecting rod 17 is hinged to the left front support seat 13.

[0041] Preferably, in this embodiment, the rear support base 12 has two upward-sloping first upper plug cylinders 100 and two downward-sloping first lower plug cylinders 110 on both sides. The left front support base 13 and the right front support base 14 each have an upward-sloping second upper plug cylinder 101 and a downward-sloping second lower plug cylinder 111 on their outer sides. Each of the first upper plug cylinders 100 and 101 is detachably fitted with a support rod 10, causing the support rod 10 to tilt upwards and outwards. Each of the first lower plug cylinders 110 and 111 is detachably fitted with a downward-sloping support leg 11, causing the support leg 11 to tilt downwards and outwards. The support leg 11 is fitted with an anti-slip sleeve 19 to enhance friction with the ground when the folding chair support 1 is in the unfolded state, ensuring safety and preventing slippage. Understandably, the support leg 11 and support rod 10 can be made into extendable rods according to the required length, or they can be set as rods of fixed length.

[0042] Combination Figure 1 , Figure 2 and Figure 8 This section describes the usage process of the folding chair support 1 in this embodiment. When the folding chair is unfolded, first rotate the left connecting rod 15 to the left to its extreme position, and rotate the right connecting rod 16 to the right to its extreme position. At this time, the folding chair support 1 is as follows: Figure 2 As shown, pull the front connecting rod 17 to rotate it around the third assembly shaft 1301. Simultaneously, push the button 1811a to move the locking member 180a upwards. Once the end not connected to the third assembly shaft 1301 moves into the connecting recess 140 of the right front support seat 14, release the button 1811a. Under the elastic force of the elastic member 182a, the locking member 180a moves downwards, quickly engaging into the through hole 170a of the front connecting rod 17, locking the front connecting rod 17 into the connecting recess 140. The folding chair bracket 1 is as follows. Figure 1 As shown, the unfolding and fixing are completed; when the folding chair bracket 1 is folded and stored, first push the button 1811a on the right front support 14, so that the push rod 1812a connected to the button 1811a moves towards the locking member 180a. The protrusion 1800a of the locking member 180a moves from the abutting rod 8121a to the transition rod 8124a. Since the top surface of the transition rod 8124a is an upwardly inclined slope, the protrusion 180a moves along the top surface of the transition rod 8124a, so that the locking member 180a moves upward and moves out of the through hole 170a. Then, operate the front connecting rod 17 to rotate towards the rear support 12, so that it disengages from the right front support 14 and moves to below the rear support 12. Then, rotate the left connecting rod 15 to the right to the limit position and rotate the right connecting rod 16 to the left to the limit position, as shown. Figure 8As shown, the folding chair support 1 is folded and stored. Furthermore, the support rod 10 and support foot 11 can be removed, making the folding chair support 1 more compact when folded and stored, and easier to carry.

[0043] Reference Figures 9 to 13 , Figures 9 to 13 This paper presents a second embodiment of the folding chair bracket 1 of the present invention. The difference between this embodiment and the first embodiment lies in the specific structure of the locking member and the pushing member in the folding locking assembly 18, and their connection relationship with the right front support seat 14. The remaining structures are the same or similar. In this embodiment, the locking member 180d includes a fixed cylinder 1800d and a fixing pin 1801d located within the fixed cylinder 1800d. The fixed cylinder 1800d is fixed to the top of the right front support seat 14, and a groove 8001d is formed on one side of the fixed cylinder 1800d. The pushing member 181d includes a button 1811d and a lifting member 1812d. The lifting member 1812d includes a pushing rod 8121d and a lifting rod 8122d formed by bending downwards from the upper end of one side of the pushing rod 8121d. The upper end face of the other side of the pushing rod 8121d is inclined. The lifting rod 8122d passes through the fixing pin 1801d and is located in the groove 8001d. Within 001d, the push rod 8121d is located outside the fixed cylinder 1800d, the button 1811d is located above the fixed pin 1801d, and the elastic element 182d is located inside the button 1811d, with one end connected to the button 1811d and the other end connected to the fixed pin 1801d. Inside the button 1811d, corresponding to the push rod 8121d, a push plate 8111d is provided. The lower end of the push plate 8111d is set as an inclined surface so that when it moves downward under the action of external force, it cooperates with the push rod 8121d to make the lifting rod 8122d move upward within the groove 8001d, thereby driving the fixed pin 1801d to move upward. Based on the above design, through the cooperation of the inclined surface of the inner push plate 8111d of the button 1811d and the inclined surface of the push rod 8121d, the push rod 8121d can move towards the fixed pin 1801d during the downward movement of the button 1811d. Since the fixed pin 1801d is located inside the fixed cylinder 1800d, and the cantilever rod 8122d is fixed to the fixed pin 1801d, the cantilever rod 8122d drives the fixed pin 1801d to move upward, so that the fixed pin 1801d moves out of the through hole.

[0044] Continue to refer to Figures 11 to 13 Furthermore, in this embodiment, a protruding ring 8011d is formed on the upper part of the fixing pin 1801d. The protruding ring 8011d is located above the fixing cylinder 1800d to limit the downward movement distance of the fixing pin 1801d.

[0045] Combination Figure 9and Figure 10 This section will specifically illustrate the usage process of the folding chair support 1 in this embodiment. When unfolding, first rotate the left connecting rod 15 to its leftmost position and the right connecting rod 16 to its rightmost position. At this time, the folding chair support 1 is as follows: Figure 10 As shown, pull the front connecting rod 17 to rotate it around the third assembly shaft 1301. Simultaneously, push the button 1811d to move the fixing pin 1801d in the locking member 180d upwards. Once the end not connected to the third assembly shaft 1301 moves into the connecting recess 140 of the right front support seat 14, release the button 1811d. Under the elastic force of the elastic member 182d, the fixing pin 1801d in the locking member 180d moves downwards, quickly engaging into the through hole 170a of the front connecting rod 17, thus locking the front connecting rod 17 into the connecting recess 140. The folding chair bracket 1 is as follows. Figure 9 As shown, the unfolding and fixing are completed; when the folding chair bracket 1 is folded and stored, first push the button 1811d located on the upper part of the right front support 14. Through the cooperation of the inclined surface of the push plate 8111d inside the button 1811d and the inclined surface of the push rod 8121d, as the button 1811d moves downward, the push rod 8121d moves towards the fixing pin 1801d. Since the fixing pin 1801d is located inside the fixing cylinder 1800d, the lifting rod 8122d, which passes through and is fixed to the fixing pin 1801d, can move upward within the groove 8001d. The movement causes the fixing pin 1801d to move upward, allowing it to exit through the through hole 170d. Then, the front connecting rod 17 is rotated towards the rear support 12, disengaging it from the right front support 14 and moving it below the rear support 12. The left connecting rod 15 is then rotated to the right to its limit position, and the right connecting rod 16 is rotated to the left to its limit position, completing the folding and storage of the folding chair bracket 1. Furthermore, the support rod 10 and support foot 11 can be removed, making the folding chair bracket 1 more compact and easier to carry when folded and stored.

[0046] Reference Figure 14 , Figure 14 This is a structural schematic diagram of a specific embodiment of the folding chair of the present invention. (In conjunction with...) Figure 1In the embodiment shown in the attached drawings, the folding chair includes a folding chair support 1 as described in the first embodiment above and a flexible seat surface 2 connected to the upper part of the folding chair support 1. A connecting sleeve 3 is connected to the outer side of each of the four corners of the flexible seat surface 2, and the connecting sleeve 3 is sleeved on the support rod 10. Understandably, the flexible seat 2 is made of a flexible and foldable material. The front side of the flexible seat 2 forms a concave space for the user to sit and lean against. When the folding chair support 1 is unfolded, the flexible seat 2 is also fully unfolded under the action of the support rod 10. Since the rear support 12, the left front support 13 and the right front support 14 are connected by the left connecting rod 15, the right connecting rod 16 and the front connecting rod 17 to form a triangular structure, it is relatively stable when unfolded and supported by the support feet 11. When the folding chair support 1 is folded, the flexible seat 2 can also be folded. The folding chair of the present invention has a simple structure and is convenient to unfold and fold. The folding locking component 18 used to lock or unlock the front connecting rod 17 is located on the right front support 14. It is not easy to accidentally touch the button when using it, avoiding the safety hazard of the folding chair suddenly folding due to the excessive weight of people when sitting down.

[0047] Understandably, in some other embodiments, the folding chair may include a folding chair support 1 as described in the second embodiment above and a flexible seat surface 2 connected to the upper part of the folding chair support 1. The connection relationship between the flexible seat surface 2 and the folding chair support 1 in this embodiment is the same as in the above embodiment, and will not be repeated here.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments, and all equivalent variations or modifications made within the scope of the claims should fall within the protection scope of the present invention.

Claims

1. A folding chair frame, characterized in that: The device includes a rear support base, a left front support base and a right front support base symmetrically arranged on one side of the rear support base, and a folding locking assembly. A left connecting rod and a right connecting rod are hinged to the rear support base, and the left and right connecting rods are also connected to the left and right front support bases, respectively. The upper and lower ends of the rear support base, the left front support base, and the right front support base are detachably connected to support rods and support feet, respectively. A front connecting rod is hinged to the left front support base. The right front support base has a connecting recess on the side opposite to the left front support base to accommodate the front connecting rod. The folding locking assembly is disposed on the right front support base and has a locked state and an unlocked state. In the locked state, the folding locking assembly can lock and fix the front connecting rod in the connecting recess of the right front support base. In the unlocked state, the front connecting rod can be displaced out of the connecting recess.

2. The folding chair bracket as described in claim 1, characterized in that: The front connecting rod has a through hole. The folding locking assembly includes a locking member and a pushing member. The locking member is located in the connecting recess. The pushing member is located on one side of the right front support seat. One end of the pushing member passes through the right front support seat and is connected to the locking member. It can push the locking member to move up and down so that the locking member is engaged in the through hole / removed from the through hole.

3. The folding chair support as described in claim 2, characterized in that: The folding locking assembly also includes an elastic element connected to the inner wall of the locking member and the connecting recess, so as to be compressed when the pushing member pushes the locking member to move upward, and to allow the locking member to quickly engage in the through hole under the action of elastic force.

4. The folding chair support as described in claim 2 or 3, characterized in that: The locking member has an outwardly protruding protrusion. The pushing member includes a button and a push rod. The push rod includes an abutting rod located below the protrusion, a connecting rod connected to the button, and a transition rod connecting the abutting rod and the connecting rod. The top surface of the transition rod is inclined so that the locking member moves upward when the button is pushed toward the locking member.

5. The folding chair bracket as described in claim 4, characterized in that: The top of the right front support is recessed inward to form a receiving cavity. The folding locking assembly also includes a guide member. The guide member includes a cover plate and a hollow guide post extending downward from the middle of the cover plate. The cover plate covers the top of the receiving cavity. The guide post passes through the receiving cavity and is located in the connecting recess. A sliding groove is provided on the side wall of the guide post. The protruding rod is located in the sliding groove and can move in the sliding groove to drive the locking member to move up and down in the guide post.

6. The folding chair bracket as described in claim 5, characterized in that: A first protrusion is formed on the cavity wall of the accommodating cavity, and the guide also includes side plates formed on both sides of the cover plate. Each side plate has a second protrusion that mates with the first protrusion to fix the guide to the right front support.

7. The folding chair bracket as described in claim 3, characterized in that: The locking component includes a fixed cylinder and a fixing pin located inside the fixed cylinder. The fixed cylinder is fixed to the top of the right front support seat, and a groove is formed on one side of the fixed cylinder. The pushing component includes a button and a lifting component. The lifting component includes a pushing rod and a lifting rod formed by bending downward from the upper end of one side of the pushing rod. The upper end face of the other side of the pushing rod is inclined. The lifting rod passes through the fixing pin and is located in the groove. The pushing rod is located outside the fixed cylinder. The button is located above the fixing pin. The elastic component is located inside the button, with one end connected to the button and the other end connected to the fixing pin. A push plate is provided inside the button corresponding to the pushing rod. The lower end of the push plate is set as an inclined surface so that when it moves downward under the action of external force, it cooperates with the pushing rod to make the lifting rod move upward in the groove, thereby driving the fixing pin to move upward.

8. The folding chair bracket as described in claim 7, characterized in that: The upper part of the fixing pin has an outwardly protruding ring, which is located above the fixing cylinder to limit the downward movement distance of the fixing pin.

9. The folding chair bracket as described in claim 1, characterized in that: The rear support base has two recessed sections on its front end, forming a first rear chamber and a second rear chamber that are symmetrically arranged. The left connecting rod and the right connecting rod are located in the first rear chamber and the second rear chamber, respectively, and are hinged to the rear support base via an assembly shaft. The left front support base has a left chamber, and the upper and lower sides of the left chamber have opposing through-holes. One end of the front connecting rod is located in the left chamber. A third assembly shaft passes through the third assembly hole located in the upper part of the left chamber, the front connecting rod, and the third assembly hole located in the lower part in sequence, so that the front connecting rod is hinged to the left front support base.

10. A folding chair, characterized in that, The folding chair includes a folding chair frame as described in any one of claims 1-9 and a flexible seat surface connected to the upper part of the folding chair frame. The flexible seat surface is provided with a plurality of connecting sleeves, which are sleeved on the support rod.

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