Foldable seat

Abstract

The utility model discloses a foldable seat, which comprises a front support, a rear support, a rear support, a front seat and a rear seat, wherein the front support comprises two front supporting legs which are arranged left and right at an interval; the rear support is arranged behind the front support and comprises two rear supporting legs which are arranged left and right at an interval; the backrest assembly is arranged at the top of the front support and the top of the rear support, the left end and the right end of the backrest assembly are provided with a front connecting arm extending towards the front lower portion and a rear connecting arm extending towards the rear lower portion respectively, and the two front connecting arms are connected with the two front supporting legs respectively; the two rear connecting arms are rotationally connected with the two rear supporting legs respectively; the seat assembly is arranged between the two front supporting legs, and the left end and the right end of the seat assembly are connected with the two front supporting legs respectively; and the rear connecting arm and the rear supporting leg are locked or unlocked through the locking mechanism. The seat is simple in structure and convenient to fold, store and transport.

Description

Technical Field

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

[0002] Some existing seats cannot be folded for storage, taking up a lot of space and making them inconvenient to store and transport. While some seats can be folded for storage, their folding structure is complex and they tend to unfold automatically after being folded.

[0003] In addition, existing car seats have limited functionality, are only suitable for children or adults, and cannot be combined with other children's or infant products, resulting in poor flexibility and affecting the user experience. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a foldable seat with a simple structure that is easy to fold, store, and transport.

[0005] The foldable seat described above is achieved through the following technical solution:

[0006] A foldable seat includes: a front support frame including two front support legs spaced apart from each other; a rear support frame disposed behind the front support frame and including two rear support legs spaced apart from each other; a backrest assembly disposed on top of the front and rear supports, wherein a front connecting arm extending forward and downward and a rear connecting arm extending backward and downward are respectively provided at the left and right ends of the backrest assembly, the two front connecting arms are respectively connected to the two front support legs, and the two rear connecting arms are respectively rotatably connected to the two rear support legs; a seat assembly disposed between the two front support legs and wherein its left and right ends are respectively connected to the two front support legs; and a locking mechanism, wherein the rear connecting arms and the rear support legs are locked or unlocked by the locking mechanism.

[0007] In some embodiments, a groove is provided on the outer side wall of the upper end of the rear support leg, and at least two locking holes are provided at circumferential intervals at the free end of the rear connecting arm; the locking mechanism includes a first locking member and a first elastic member. The first locking member is movably disposed in the upper end of the rear support leg, and an upwardly extending locking tongue is provided on the top of the first locking member. The locking tongue can lock or unlock with any of the locking holes. An outwardly extending unlocking part is provided on the outer side wall of the first locking member. The unlocking part is movably inserted into the groove. The first elastic member is disposed in the rear support leg to keep the first locking member always moving towards the rear connecting arm.

[0008] In some embodiments, the unlocking part is recessed with a receiving groove facing the opening of the slide groove; and / or a positioning groove is provided at the lower end of the first locking member, a stop is provided in the rear support foot, the upper end of the first elastic member is inserted into the positioning groove and abuts or connects with the first locking member, and the lower end of the first elastic member abuts or connects with the stop.

[0009] In some embodiments, a vertically arranged guide groove is provided on the first locking member, and a fixing post extending toward the guide groove is provided at the upper end of the rear support leg, the fixing post being slidably connected to the guide groove.

[0010] In some embodiments, the seat assembly includes a fixed seat and a seat plate, the left and right ends of the fixed seat are respectively connected to two front support legs, the seat plate is movably disposed on top of the fixed seat, and the seat plate and the fixed seat are detachably connected by at least two connectors or snap-fit ​​structures.

[0011] In some embodiments, the fixed seat has a plurality of openings spaced apart and equal in number to the connecting members, and a group of fixing holes is provided at the bottom of the seat plate corresponding to the openings. The group of fixing holes includes a plurality of fixing holes spaced apart along the front-back direction of the seat plate. The connecting member passes through the openings from bottom to top and is fastened to any of the fixing holes in the group of fixing holes.

[0012] In some embodiments, a first reinforcing frame arranged laterally in the left-right direction is provided in the front end of the fixing base, and / or at least two second reinforcing frames arranged in the front-back or left-right direction are provided in the fixing base, with the at least two second reinforcing frames corresponding to at least two of the connecting members.

[0013] In some embodiments, a foot pedal assembly and / or a height adjustment mechanism are also included, the foot pedal assembly being disposed between the two front support legs, and the foot pedal assembly and / or the seat assembly being connected to the front support legs via the height adjustment mechanism.

[0014] In some embodiments, both front support legs are provided with a plurality of positioning holes that open toward the seat assembly and are spaced apart along the height direction; mounting grooves are provided at the left and right ends of the bottom of the foot pedal assembly and / or the seat assembly, and through holes are provided in the side wall of the mounting groove near the positioning holes; the height adjustment mechanism includes a second locking member, a second elastic member, and an adjusting member. The second locking member is movably disposed in the mounting groove, and a locking pin protrudes from one end of the second locking member near the through hole. The locking pin can movably pass laterally through the through hole and engage with any of the positioning holes. The second elastic member is disposed in the mounting groove to keep the second locking member moving toward the positioning hole. The adjusting member is movably disposed outside the mounting groove and connected to the second locking member to drive the second locking member to move toward or away from the positioning hole.

[0015] In some embodiments, a limiting hole is provided at the bottom of the foot pedal assembly and / or the seat assembly near the mounting groove, and a guide hole is provided on the second locking member; a first protrusion and a second protrusion extending upward are respectively provided at the left and right ends of the adjusting member, the first protrusion is inserted into the limiting hole, and the second protrusion is inserted into the guide hole in a way that allows it to move left and right.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] 1. The seat of this utility model has a front support connected to the backrest assembly and the seat assembly respectively, and a rear support set behind the front support and rotatably connected to the backrest assembly. The rear support and the backrest assembly are locked or unlocked by a locking mechanism so that the rear support or the seat can reliably switch between the folded state and the unfolded state. The structure is simple, easy to fold, store and transport, and the rear support is stable and reliable after folding and will not unfold automatically.

[0018] 2. The seat assembly includes a fixed seat and a seat plate. The left and right ends of the fixed seat are respectively connected to two front support legs. The seat plate is movably mounted on top of the fixed seat and is detachably connected to the fixed seat by at least two connectors or buckle structures. This allows the position of the seat plate to be adjusted forward and backward, making the seat more suitable for children or adults and improving the flexibility of use.

[0019] 3. By designing the seat assembly and / or footrest assembly to be able to move up and down relative to the front support, the seat can be better adapted to children of different heights, making it more flexible to use. Attached Figure Description

[0020] Figure 1 This is an exploded view of the seat in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the seat in the unfolded state in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the seat in a folded state in an embodiment of this utility model;

[0023] Figure 4 This is a cross-sectional view of the seat in the unfolded state in an embodiment of this utility model. Figure 1 ;

[0024] Figure 5 This is a cross-sectional view of the seat in the unfolded state in an embodiment of this utility model. Figure 2 ;

[0025] Figure 6 This is an exploded view of the front bracket and locking mechanism in an embodiment of this utility model;

[0026] Figure 7 This is a cross-sectional view of the seat in the unfolded state in an embodiment of this utility model. Figure 3 ;

[0027] Figure 8 The explosion of the seat assembly and height adjustment assembly in this embodiment of the utility model Figure 1 ;

[0028] Figure 9 The explosion of the seat assembly and height adjustment assembly in this embodiment of the utility model Figure 2 ;

[0029] Figure 10 This is a cross-sectional view of the seat assembly and height adjustment assembly in an embodiment of the present invention. Figure 1 ;

[0030] Figure 11 This is a cross-sectional view of the seat assembly and height adjustment assembly in an embodiment of the present invention. Figure 2 ;

[0031] Figure 12 This is a cross-sectional view of the seat in the unfolded state in an embodiment of this utility model. Figure 4 ;

[0032] Figure 13 The explosion of the foot pedal assembly and height adjustment assembly in this embodiment of the utility model Figure 1 ;

[0033] Figure 14 The explosion of the foot pedal assembly and height adjustment assembly in this embodiment of the utility model Figure 2 .

[0034] In the diagram: 1-Seat module, 11-Front bracket, 111-Front connecting rod, 112-Front support foot, 1121-Guide rail groove, 1122-Positioning hole, 12-Rear bracket, 121-Rear connecting rod, 122-Rear support foot, 1221-Slide groove, 1222-Stop, 1223-Fixing column, 13-Backrest assembly, 131-Lower slot, 132-Front connecting arm, 133-Rear connecting arm, 1331-Lock hole, 14-Seat assembly, 141-Fixing seat, 1411-Crossbeam, 1412-Mounting hole, 1413-Snap-fit ​​hole, 1414-Opening, 1415-Mounting groove, 1416-Limiting hole. 142-Seat plate, 1421-Fixing hole, 143-First reinforcing frame, 144-Second reinforcing frame, 145-Slider, 15-Locking mechanism, 151-First locking element, 1511-Lock tongue, 1512-Unlocking part, 1513-Receiving groove, 1514-Positioning groove, 1515-Guide groove, 152-First elastic element, 16-Foot pedal assembly, 161-Connecting seat, 162-Foot pedal, 17-Height adjustment mechanism, 171-Second locking element, 1711-Locking pin, 1712-Guide hole, 172-Second elastic element, 173-Adjusting element, 1731-First protrusion, 1732-Second protrusion. Detailed Implementation

[0035] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0036] Example 1

[0037] refer to Figure 1-6 This embodiment provides a foldable seat, including a seat module 1. The seat module 1 includes a front support 11, a rear support 12, a backrest assembly 13, a seat assembly 14, and a locking mechanism 15. The front support 11 includes a front connecting rod 111 and two front support legs 112 arranged at intervals on the left and right sides. The lower ends of the two front support legs 112 are connected and fixed together by the front connecting rod 111 to improve the overall strength of the front support. The rear support 12 is located behind the front support 11 and includes a rear connecting rod 121 and two rear support legs 122 arranged at intervals on the left and right sides. The lower ends of the two rear support legs 122 are connected and fixed together by the rear connecting rod 121 to improve the overall strength of the rear support 12. The seat assembly 14 is located between the two front support legs 112, and its left and right ends are respectively connected to the two front support legs 112.

[0038] The backrest assembly 13 is disposed on the top of the front support 11 and the rear support 12. A lower retaining groove 131 is recessed at the bottom of the backrest assembly 13. A front connecting arm 132 extending forward and downward and a rear connecting arm 133 extending backward and downward are respectively provided at the left and right ends of the backrest assembly 13. The two front connecting arms 132 are respectively connected and fixed to the two front support legs 112, and the two rear connecting arms 133 are respectively rotatably connected to the two rear support legs 122. In this embodiment, the front support 11 cannot rotate relative to the backrest assembly 13, while the rear support legs 122 can rotate around the backrest assembly 13 to fold towards the front support 11 or unfold away from the front support 11. The rear connecting arms 133 and the rear support legs 122 are locked or unlocked by a locking mechanism 15. When the locking mechanism 15 is unlocked, the rear support leg 122 can rotate around the backrest assembly 13 to fold towards the front support 11 or unfold away from the front support 11, so that the rear support 12 can fold towards the front support 11 or unfold away from the front support 11. Conversely, when the locking mechanism 15 is locked, the rear support leg 122 cannot rotate around the backrest assembly 13, so that the rear support 12 can be stably and reliably maintained in the folded or unfolded state. The structure is simple, easy to fold, store and transport, and the rear support is stable and reliable after folding and will not unfold automatically.

[0039] Specifically, a vertically arranged groove 1221 is provided on the upper end of the outer side wall of the rear support leg 122 facing the rear connecting rod 111, and at least two circumferentially spaced locking holes 1331 are provided on the free end of the rear connecting arm 133, so that the rear support leg 122 can be reliably positioned at different rotation angles. The locking mechanism 15 includes a first locking member 151 and a first elastic member 152. The first locking member 151 is movably disposed in the upper end of the rear support leg 122, and an upwardly extending locking tongue 1511 is provided on the top of the first locking member 151. The locking tongue 1511 can be locked or unlocked with any locking hole 1331 on the rear connecting arm 133. An outwardly extending unlocking part 1512 is provided on the outer side wall of the first locking member 151 facing the groove 1221, and the unlocking part 1512 is movably inserted into the groove 1221. The first elastic member 152 is disposed inside the rear support foot 122, and its upper and lower ends abut or connect with the first locking member 151 and the rear support foot 122 respectively, so as to keep the first locking member 151 always moving towards the rear connecting arm 133.

[0040] When the unlocking part 1512 is pushed downward along the slide groove 1221 by an external force, the first locking member 151 of the unlocking part 1512 can move downward, so that the locking tongue 1511 moves away from the lock hole 1331 and is unlocked. At this time, the rear support foot can rotate relative to the backrest assembly. Conversely, when the external force is removed, the first locking member 151 automatically moves upward under the push of the first elastic member 152, so that the locking tongue 1511 is inserted into the corresponding lock hole 1331 and locked. At this time, the rear support foot cannot rotate relative to the backrest assembly, so that the rear bracket 12 is reliably positioned in the unfolded or folded state.

[0041] refer to Figure 3-5 In this embodiment, the unlocking part 1512 is recessed with a receiving groove 1513 that opens toward the slide groove 1221. The receiving groove 1513 is suitable for accommodating the user's finger; and / or a positioning groove 1514 is provided at the lower end of the first locking member 151, and a stop part 1222 is provided in the rear support foot 122. The upper end of the first elastic member 152 is inserted into the positioning groove 1514 and abuts or connects with the first locking member 151, and the lower end of the first elastic member 152 abuts or connects with the stop part 1222.

[0042] More specifically, a guide groove 1515 is provided on the first locking member 151, which is arranged vertically and located above or below the unlocking part 1512. A fixing post 1223 extending toward the guide groove 1515 is provided on the upper end of the rear support foot 122. The fixing post 1223 is slidably connected to the guide groove 1515, thereby guiding the up and down movement of the first locking member and preventing displacement.

[0043] refer to Figure 1-11 Specifically, the seat assembly 14 includes a fixed base 141 and a seat plate 142. The left and right ends of the fixed base 141 are respectively connected to two front support legs 112. The seat plate 142 is movably disposed on top of the fixed base 141, and the seat plate 142 and the fixed base 141 are detachably connected by at least two connectors (not shown in the figure) or a snap-fit ​​structure, thereby making the position of the seat plate 142 adjustable, thus making the seat more suitable for children or adults and improving the flexibility of use. In particular, in other embodiments, the seat plate can be designed to be unable to move back and forth relative to the fixed base 141. In this case, the seat plate and the fixed base 141 can be integrally injection molded, or they can be detachably connected by connecting screws or a snap-fit ​​structure.

[0044] refer to Figure 9-11The mounting base 141 has a plurality of openings 1414 spaced apart and equal in number to the connecting members (e.g., screws). In this embodiment, there are three openings, and the center points of the three openings 1414 are adjacent to each other to form a triangle. A group of fixing holes is provided at the bottom of the seat plate 142 at the positions corresponding to the openings 1414. The group of fixing holes includes a plurality of fixing holes 1421 spaced apart along the front-back direction of the seat plate 142. The connecting member passes through the openings 1414 from bottom to top and is then securely connected to any one of the fixing holes 1421 in the group of fixing holes. Thus, by adjusting one of the fixing holes 1421 in the group of fixing holes to align with the corresponding opening, and then connecting and fixing it with the connecting member, the front-back position of the seat plate 142 can be adjusted.

[0045] More specifically, the seat assembly 14 further includes a first reinforcing frame 143 and / or a second reinforcing frame 144. The first reinforcing frame 143 is provided in the front end of the fixed seat 141 and is arranged laterally in the left-right direction to enhance the overall strength of the front end of the seat assembly 14. And / or at least two second reinforcing frames 144 are provided in the fixed seat 141 and are arranged in the front-back or left-right direction. The at least two second reinforcing frames 144 are arranged in a one-to-one correspondence with at least two connectors (or multiple openings) to enhance the strength of the rear end of the seat assembly and facilitate the improvement of the connection stability and reliability between the seat plate and the fixed seat.

[0046] refer to Figure 8-11 A downwardly extending crossbeam 1411 protrudes from the bottom front end of the fixing seat 141 of the seat assembly 14. The left and right ends of the crossbeam 1411 are respectively connected to the two front support legs of the front bracket 11. Multiple openings 1414 are provided behind the crossbeam. A mounting hole 1412 penetrating through the front and rear side walls is provided in the middle of the crossbeam 1411 in the left-right direction. In addition, a snap-fit ​​hole 1413 is provided at the bottom of the crossbeam 1411 at the position corresponding to the mounting hole, and the snap-fit ​​hole 1413 is connected to the mounting hole 1412.

[0047] refer to Figure 1-3 and Figure 12-14 Furthermore, the seat module 1 also includes a footrest assembly 16, which is disposed between the two front support legs 112 to reliably support the child's feet and improve the child's comfort while sitting in the seat. Specifically, the footrest assembly 16 includes a connecting seat 161 and a foot pedal 162. The left and right ends of the connecting seat 161 are respectively connected to the two front support legs 112 of the front bracket 11. In this embodiment, a downwardly extending crossbeam 1411 is provided at the bottom front end of the connecting seat 161, and the left and right ends of the crossbeam 1411 are respectively connected to the two front support legs of the front bracket 11. The foot pedal 162 is disposed on the top of the connecting seat 161. The foot pedal 162 can be integrally injection molded with the connecting seat 161, or it can be detachably connected by using connecting screws or a snap-fit ​​structure.

[0048] Example 2

[0049] refer to Figure 1-14 The difference between this embodiment and embodiment 1 is that the seat module 1 further includes a height adjustment mechanism 17. The foot pedal assembly 16 and / or the seat assembly 14 are connected to the front support leg 112 through the height adjustment mechanism 17, so that the height of the foot pedal assembly 16 and / or the seat assembly 14 is adjustable to accommodate children of different heights.

[0050] Specifically, each of the two front support legs 112 is provided with a plurality of positioning holes 1122 that open toward the seat assembly 14 and are spaced apart along the height direction, see [reference]. Figure 1 Mounting grooves 1415 are provided at both ends of the bottom of the foot pedal assembly 16 and / or the seat assembly 14. Through holes (not shown in the figure) are formed in the side walls of the mounting grooves 1415 near the positioning holes 1122. In this embodiment, downward-opening mounting grooves 1415 are recessed at both ends of the bottom of the crossbeam 1411 of the foot pedal assembly 16 and / or the seat assembly 14. (See reference) Figure 7-14 The height adjustment mechanism 17 includes a second locking member 171, a second elastic member 172, and an adjusting member 173. The second locking member 171 is movably disposed within the mounting groove 1415. A locking pin 1711 protrudes from one end of the second locking member 171 near the through hole. The locking pin 1711 can movably pass laterally through the through hole and engage with any positioning hole 1122. The second elastic member 172 is disposed within the mounting groove 1415, and its left and right ends respectively abut or connect with the second locking member 171 and the crossbeam, used to ensure that the second locking member 171 always maintains a tendency to move towards the positioning hole 1122. The adjusting member 173 is movably disposed outside the mounting groove 1415 and connected to the second locking member 171, used to drive the second locking member 171 to move towards or away from the positioning hole 1122.

[0051] When the adjusting member 173 is pushed by an external force to move away from the positioning hole 1122, the adjusting member 173 can simultaneously drive the second locking member to move, so that the locking pin 1711 moves away from the positioning hole 1122 and is unlocked. At this time, the foot pedal assembly 16 and / or the seat assembly 14 can be adjusted to the required height. Conversely, when the external force is removed, the second locking member moves automatically upward under the push of the second elastic member, so that the locking pin 1711 is inserted into the corresponding positioning hole 1122 and locked, thereby reliably limiting and fixing the foot pedal assembly 16 and / or the seat assembly 14 on the front bracket 11.

[0052] More specifically, a limiting hole 1416 is provided at the bottom of the crossbeam 1411 of the foot pedal assembly 16 and / or the seat assembly 14, near the mounting groove 1415, and a guide hole 1712 is provided on the second locking member 171. A first protrusion 1731 and a second protrusion 1732 extending upwards are respectively provided at the left and right ends of the adjusting member 173. The first protrusion 1731 is inserted into the limiting hole 1416 of the crossbeam 1411, and the second protrusion 1732 is movably inserted into the guide hole 1712. This guides the movement of the adjusting member 173 and the second locking member 171, preventing displacement, while ensuring that the adjusting member 173 reliably drives the second locking member to move.

[0053] Furthermore, a guide rail assembly (not shown in the figure) is provided between the front support leg 112 and the foot pedal assembly 16 and / or the seat assembly 14 to guide the foot pedal assembly 16 and / or the seat assembly 14 to move up and down along the guide rail assembly and prevent displacement. The guide rail assembly includes a guide rail groove 1121 and a slider 145. A vertically arranged guide rail groove 1121 is recessed on the outer side wall of the front support leg 112 facing the front connecting rod 111. A plurality of positioning holes 1122 are spaced apart along the height direction on the side wall of the guide rail groove 1121 facing the front connecting rod 111. The slider 145 is disposed on the foot pedal assembly 16 or the seat assembly 14 and is slidably connected to the guide rail groove 1121.

[0054] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A foldable seat, characterized in that, include: The front bracket (11) includes two front support legs (112) arranged at intervals on the left and right sides; The rear bracket (12) is located behind the front bracket (11) and includes two rear support legs (122) arranged at left and right intervals. A backrest assembly (13) is disposed on the top of the front support (11) and the rear support (12). At the left and right ends of the backrest assembly (13), there are front connecting arms (132) extending forward and downward and rear connecting arms (133) extending backward and downward respectively. The two front connecting arms (132) are respectively connected to the two front support legs (112), and the two rear connecting arms (133) are respectively rotatably connected to the two rear support legs (122). A seat assembly (14) is disposed between the two front support legs (112), and its left and right ends are respectively connected to the two front support legs (112); and The locking mechanism (15) is used to lock or unlock the rear connecting arm (133) and the rear support foot (122).

2. A foldable seat according to claim 1, characterized in that, A sliding groove (1221) is provided on the outer side wall at the upper end of the rear support leg (122), and at least two locking holes (1331) are provided at the free end of the rear connecting arm (133) with circumferential spacing. The locking mechanism (15) includes a first locking member (151) and a first elastic member (152). The first locking member (151) is movably disposed in the upper end of the rear support leg (122). A latch (1511) extending upward is provided on the top of the first locking member (151). The latch (1511) can lock or unlock with any of the lock holes (1331). An unlocking part (1512) extending outward is provided on the outer side wall of the first locking member (151). The unlocking part (1512) is movably inserted into the slide groove (1221). The first elastic member (152) is disposed in the rear support leg (122) to keep the first locking member (151) always moving towards the rear connecting arm (133).

3. A foldable seat according to claim 2, characterized in that, The unlocking part (1512) is recessed with a receiving groove (1513) opening toward the slide groove (1221); and / or a positioning groove (1514) is provided at the lower end of the first locking member (151), a stop part (1222) is provided in the rear support foot (122), the upper end of the first elastic member (152) is inserted into the positioning groove (1514) and abuts or connects with the first locking member (151), and the lower end of the first elastic member (152) abuts or connects with the stop part (1222).

4. A foldable seat according to claim 2, characterized in that, A vertically arranged guide groove (1515) is provided on the first locking member (151), and a fixing post (1223) extending toward the guide groove (1515) is provided at the upper end of the rear support foot (122), and the fixing post (1223) is slidably connected to the guide groove (1515).

5. A foldable seat according to claim 1, characterized in that, The seat assembly (14) includes a fixed seat (141) and a seat plate (142). The left and right ends of the fixed seat (141) are respectively connected to the two front support legs (112). The seat plate (142) is movably disposed on the top of the fixed seat (141), and the seat plate (142) and the fixed seat (141) are detachably connected by at least two connectors or snap-fit ​​structures.

6. A foldable seat according to claim 5, characterized in that, The fixing base (141) has a plurality of openings (1414) spaced apart and equal in number to the connecting members. A fixing hole group is provided at the bottom of the seat plate (142) at the position corresponding to the openings (1414). The fixing hole group includes a plurality of fixing holes (1421) spaced apart along the front-back direction of the seat plate (142). The connecting member passes through the openings (1414) from bottom to top and is fastened to any of the fixing holes (1421) in the fixing hole group.

7. A foldable seat according to claim 5 or 6, characterized in that, A first reinforcing frame (143) is provided in the front end of the fixed base (141) and arranged laterally in the left-right direction, and / or at least two second reinforcing frames (144) are provided in the fixed base (141) and arranged in the front-back or left-right direction, with the at least two second reinforcing frames (144) corresponding to at least two of the connecting members.

8. A foldable seat according to claim 1, 5, or 6, characterized in that, It also includes a foot pedal assembly (16) and / or a height adjustment mechanism (17), the foot pedal assembly (16) being disposed between the two front support legs (112), the foot pedal assembly (16) and / or the seat assembly (14) being connected to the front support legs (112) via the height adjustment mechanism (17).

9. A foldable seat according to claim 8, characterized in that, Both of the front support legs (112) are provided with a plurality of positioning holes (1122) that open toward the seat assembly (14) and are spaced apart along the height direction; mounting grooves (1415) are provided at the left and right ends of the bottom of the foot pedal assembly (16) and / or the seat assembly (14), and through holes are provided in the side groove wall of the mounting groove (1415) near the positioning holes (1122); The height adjustment mechanism (17) includes a second locking member (171), a second elastic member (172), and an adjusting member (173). The second locking member (171) is movably disposed in the mounting groove (1415). A locking pin (1711) is protruding at one end of the second locking member (171) near the through hole. The locking pin (1711) can movably pass laterally through the through hole and engage with any of the positioning holes (1122). The second elastic member (172) is disposed in the mounting groove (1415) to keep the second locking member (171) always moving toward the positioning hole (1122). The adjusting member (173) is movably disposed outside the mounting groove (1415) and connected to the second locking member (171) to drive the second locking member (171) to move toward or away from the positioning hole (1122).

10. A foldable seat according to claim 9, characterized in that, A limiting hole (1416) is provided at the bottom of the foot pedal assembly (16) and / or the seat assembly (14) near the mounting groove (1415), and a guide hole (1712) is provided on the second locking member (171); a first protrusion (1731) and a second protrusion (1732) extending upward are respectively provided at the left and right ends of the adjusting member (173), the first protrusion (1731) is inserted into the limiting hole (1416), and the second protrusion (1732) is inserted into the guide hole (1712) so as to move left and right.

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