Back-chasing seat

Abstract

The utility model relates to the technical field of seats, in particular to a back-chasing seat which comprises a cushion, seat legs and a backrest, a mounting frame is arranged below the cushion and connected with the seat legs through telescopic pipes, wheels are arranged at the bottoms of the seat legs so that the seat legs can move, and the bottoms of the telescopic pipes penetrate through the seat legs and are provided with brake assemblies capable of limiting movement. A rotatable connecting rod is arranged between one end of the mounting frame and the cushion, the other end of the mounting frame is rotationally connected with a connecting frame, the backrest is arranged on the connecting frame, and the connecting frame is rotationally connected with the other end of the cushion. When the cushion is stressed downwards and moves forwards, the end, connected with the cushion, of the connecting frame is driven to move downwards and forwards synchronously, so that the end, connected with the backrest, of the connecting frame moves forwards to drive the backrest to be attached to the back of a child.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a chair with a backrest. Background Art

[0002] A chair is a kind of seat with a backrest and armrests. It is divided into adult seats and child seats according to different people. Child seats are a kind of equipment that children often use on their growth path, and they have a great impact on children's learning posture during daily learning.

[0003] When using existing child seats, the seat height is generally adjusted manually, but the backrests are mostly fixed and cannot be moved forward and backward, resulting in a fixed seat depth that cannot be adjusted as needed. Therefore, when children use them, the seats cannot fit the children's backs well. These defects can easily lead to fatigue and hunchback problems after children sit for a long time, which is not conducive to the healthy growth and happy learning of children. Summary of the invention

[0004] The utility model aims to provide a chair with a retractable backrest, which can move the backrest forward and fit the back of a child by synchronously moving a seat cushion and a connecting frame and coordinating the rotation of the connecting frame, thereby solving the problem that the existing backrest is fixed.

[0005] The purpose of the utility model is achieved in this way:

[0006] A chair with a retractable backrest comprises a seat cushion, a seat foot and a backrest, wherein a mounting frame is arranged below the seat cushion, and the mounting frame is connected to the seat foot via a telescopic tube, the bottom of the seat foot is provided with wheels so as to be movable, and the bottom of the telescopic tube passes through the seat foot and is provided with a brake assembly capable of limiting movement;

[0007] A rotatable connecting rod is arranged between one end of the mounting frame and the seat cushion, and the other end of the mounting frame is rotatably connected to a connecting frame, and the backrest is arranged on the connecting frame, and the connecting frame is rotatably connected to the other end of the seat cushion. When the seat cushion is forced downward and moves forward, the end of the connecting frame connected to the seat cushion will be driven to move downward and forward synchronously, thereby causing the end of the connecting frame connected to the backrest to move forward and drive the backrest to fit the child's back.

[0008] Preferably, a gas spring is provided between the mounting frame and the connecting frame. When the child leaves the seat cushion, the connecting frame will be reset due to the gas spring, thereby driving the seat cushion to be reset.

[0009] Preferably, an assembly frame is arranged between the backrest and the connecting frame, and the assembly frame comprises a connecting member 1, and an elastic member is arranged between the connecting member 1 and the backrest, and a connecting member 2 is arranged between the connecting member 1 and the connecting frame;

[0010] The second connector is inserted into the connecting frame and is rotatably connected with the connecting frame, and a U-shaped tube is arranged in the connecting frame, and the gas spring is connected to the mounting frame through one end of the U-shaped tube, and the other end of the U-shaped tube passes through the second connector.

[0011] Preferably, the telescopic tube comprises an outer tube and an inner tube movably arranged on the outer tube, the top of the inner tube is connected to the mounting frame, the outer tube is connected to the seat foot, and the bottom of the outer tube passes through the seat foot and is exposed;

[0012] A placement groove is provided at the bottom of the outer tube, and the brake assembly is arranged in the placement groove, and the brake assembly includes a base, a spring and a wire drawing, a spring is arranged between the base and the placement groove, and one end of the wire drawing is connected to the base, and the other end of the wire drawing is connected to the switch at the bottom of the seat cushion;

[0013] The base is driven upward by applying force to the base through the wire drawing, and the force applied to the base by the wire drawing is released by turning the switch, at which time the base moves downward due to the spring to restrict movement.

[0014] Preferably, the base has a built-in rocker arm and a mounting piece, and one end of the rocker arm is rotatably connected to the bottom surface of the placement groove, and the other end of the rocker arm is connected to the wire drawing. The mounting piece is connected to the rocker arm and moves up and down as the rocker arm swings, and the bottom of the mounting piece is connected to the base. The wire drawing applies force to the rocker arm so that the mounting piece drives the base to move upward, and the switch is turned to drive the wire drawing to relax the force applied to the rocker arm. At this time, the base moves downward due to the spring to limit the movement.

[0015] Preferably, the telescopic tube comprises an outer tube and an inner tube movably arranged on the outer tube, the top of the inner tube is connected to the mounting frame, the outer tube is connected to the seat foot, and the bottom of the outer tube passes through the seat foot and is provided with a brake assembly that can limit movement;

[0016] The outer tube has a hollow rod built in, and a nut is provided on the top of the rod, and a connecting sleeve is built in the inner tube, and a screw is provided at the bottom of the connecting sleeve, one end of the screw is provided with a bevel gear 1, and the other end of the screw passes through the nut and is located in the rod, and a rotating rod passes through the connecting sleeve, and the rotating rod sleeve is provided with a bevel gear 2 meshing with the bevel gear 1, and the bevel gear 2 is driven to rotate by the transmission rotating rod, thereby driving the bevel gear 1 to rotate and driving the screw to rotate, and the screw is driven to rise through the threaded connection between the screw and the nut, thereby driving the inner tube to rise.

[0017] Preferably, one end of the connecting rod is connected to the seat cushion through a rotating shaft 1, and the other end of the connecting rod is connected to the mounting frame through a rotating shaft 2. A limiting portion is provided at the end of the connecting rod connected to the mounting frame, and the mounting frame is provided with an opening for the limiting portion to enter, and a protrusion is provided on the inner wall of the mounting frame, and the limiting portion abuts against the protrusion to limit the limiting portion from moving downward.

[0018] Preferably, the seat cushion is provided with a connecting portion 1 at one end connected to the connecting frame, and the connecting frame is grooved for the connecting portion 1 to be placed therein, and the connecting frame and the connecting portion 1 are connected via a rotating shaft 3;

[0019] Or / and, the mounting frame has a groove for the bottom of the connecting frame to be placed, and the connecting frame and the mounting frame are connected through a rotating shaft four.

[0020] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0021] The seat cushion of the utility model is connected to the connecting frame, so when the seat cushion is forced to move downward and forward, one end of the connecting frame connected to the seat cushion will move downward and forward synchronously with the seat cushion. At this time, since the connecting frame is rotatably arranged on the mounting frame, the end of the connecting frame connected to the backrest will move forward accordingly, thereby driving the backrest to fit the child's back. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 It is a schematic structural diagram of the cross-section of the utility model.

[0024] Figure 3 for Figure 2 Schematic diagram of the structure with the A part in the middle enlarged.

[0025] Figure 4 Schematic diagram of the split structure between the seat cushion and the backrest.

[0026] Figure 5 Schematic diagram of gas spring related structure.

[0027] Figure 6 It is a schematic diagram of the structure of the bottom of the seat cushion.

[0028] Figure 7 It is a schematic diagram of the structure of the front shell.

[0029] Figure 8 A schematic diagram of the mounting frame related structure.

[0030] Fig. 9 A schematic diagram of the structure of the brake assembly.

[0031] Reference numerals: 1-seat cushion; 11-switch; 12-connecting portion 1; 13-rotating shaft 3; 2-seat foot;

[0032] 21-wheel; 22-cover; 3-backrest; 4-mounting frame; 41-connecting rod; 411-rotating shaft 1;

[0033] 412 - shaft 2; 413 - limiting part; 42 - upper shell; 421 - mounting part; 422 - mounting groove; 43 - lower shell;

[0034] 44-opening; 45-protrusion; 5-telescopic tube; 51-outer tube; 511-slot; 52-inner tube; 53-rod;

[0035] 54-connecting sleeve; 55-screw; 531-nut; 56-bottom cover; 6-connecting frame; 61-U-shaped tube;

[0036] 62-front shell; 63-rear shell; 64-groove one; 65-groove two; 66-rotating shaft four; 7-gas spring;

[0037] 71-spindle six; 8-assembly frame; 81-connecting piece one; 82-elastic piece; 83-connecting piece two;

[0038] 84-rotating shaft five; 85-connecting shaft; 9-brake assembly; 91-base; 92-spring; 93-drawing;

[0039] 94-swing rod; 95-mounting piece; 96-connecting plate; 97-mounting shaft; 98-anti-slip pad; 10-rotating rod;

[0040] 20-handrail; 30-pedal. DETAILED DESCRIPTION

[0041] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0042] like Figure 1-Figure 9 As shown, a chair with a retractable backrest includes a seat cushion 1, a seat leg 2 and a backrest 3, and a mounting frame 4 is arranged under the seat cushion 1, and the mounting frame 4 is connected to the seat leg 2 through a telescopic tube 5, and a wheel 21 is arranged at the bottom of the seat leg 2 so that it can be movable, and the bottom of the telescopic tube 5 passes through the seat leg 2 and is provided with a brake assembly 9 that can limit movement.

[0043] At the same time, a rotatable connecting rod 41 is arranged between one end of the mounting frame 4 and the seat cushion 1, and the other end of the mounting frame 4 is rotatably connected to the connecting frame 6, and the backrest 3 is arranged on the connecting frame 6, and the connecting frame 6 is rotatably connected to the other end of the seat cushion 1.

[0044] Therefore, in actual use, when the seat cushion 1 is forced downward and moves forward, it will drive the end of the connecting frame 6 connected to the seat cushion 1 to move downward and forward synchronously, so that the end of the connecting frame 6 connected to the backrest 3 moves forward and drives the backrest 3 to fit the child's back. Therefore, by the synchronous movement of the seat cushion 1 and the connecting frame 6 and the rotation of the connecting frame 6, the backrest 3 moves forward and fits the child's back.

[0045] The seat cushion 1 is provided with armrests 20 on both sides to facilitate children to hold, and the seat foot 2 is provided with a pedal 30 to facilitate children to step on, and the pedal 30 is adjustable, and the specific structure is the cooperation of multiple holes and shafts.

[0046] Secondly, the structure between the seat cushion 1 and the connecting frame 6 is as follows: first, the seat cushion 1 is provided with a connecting portion 12 at one end connected to the connecting frame 6, and the connecting frame 6 is grooved for the connecting portion 12 to be placed, and the connecting frame 6 and the connecting portion 12 are connected through a rotating shaft 3 13.

[0047] At the same time, the mounting frame 4 is grooved for the bottom of the connecting frame 6 to be placed, and the connecting frame 6 and the mounting frame 4 are connected through the rotating shaft 4 66.

[0048] Moreover, the related structure of the connecting rod 41 is as follows: first, one end of the connecting rod 41 is connected to the seat cushion 1 through the rotating shaft 1 411, and the other end of the connecting rod 41 is connected to the mounting frame 4 through the rotating shaft 2 412, and at the same time, a limiting portion 413 is provided at the end of the connecting rod 41 connected to the mounting frame 4, and the mounting frame 4 is provided with an opening 44 for the limiting portion 413 to enter, and a protrusion 45 is provided on the inner wall of the mounting frame 4, and the limiting portion 413 abuts against the protrusion 45 to limit the limiting portion 413 from moving downward.

[0049] Therefore, in actual use, the connecting rod 41 is connected at both ends through the shaft, and the limiting portion 413 abuts against the protrusion 45 to limit the limiting portion 413 from moving downward.

[0050] like Figure 2 As shown, a gas spring 7 is provided between the mounting frame 4 and the connecting frame 6. When the child leaves the seat cushion 1, the connecting frame 6 will be reset due to the gas spring 7, thereby driving the seat cushion 1 to reset.

[0051] At the same time, the structure between the gas spring 7 and the backrest 3 is: first, an assembly frame 8 is set between the backrest 3 and the connecting frame 6, and the assembly frame 8 includes a connecting member 81, and an elastic member 82 is set between the connecting member 81 and the backrest 3, and a connecting member 83 is set between the connecting member 81 and the connecting frame 6.

[0052] The connecting member 81 and the backrest 3 are both grooved for the elastic member 82 to be placed, and the setting of the elastic member 82 can fine-tune the backrest 3 to make it fit better.

[0053] At the same time, the second connecting piece 83 penetrates into the connecting frame 6 and is rotatably connected to the connecting frame 6, and a U-shaped tube 61 is provided in the connecting frame 6, and the gas spring 7 is connected to the mounting frame 4 through one end of the U-shaped tube 61, and the other end of the U-shaped tube 61 passes through the second connecting piece 83.

[0054] Therefore, in actual use, the U-shaped tube 61 can be used for multiple purposes, that is, it connects the gas spring 7 and the mounting frame 4 , and also connects the gas spring 7 and the second connecting piece 83 .

[0055] Next, the gas spring 7 has the following structure: first, the mounting frame 4 includes an upper shell 42 and a lower shell 43, and the upper shell 42 is provided with a mounting portion 421, and the mounting portion 421 is provided with a mounting groove 422. Therefore, in actual use, the end of the gas spring 7 is located in the mounting groove 422, and one end of the U-shaped tube 61 passes through the mounting portion 421 and the gas spring 7.

[0056] Meanwhile, the structure of the other end of the gas spring 7 is as follows: first, the connecting frame 6 includes a front shell 62 and a rear shell 63, and both the front shell 62 and the rear shell 63 are provided with a groove 2 65, and a rotating shaft 6 71 is provided at the other end of the gas spring 7. Therefore, in actual use, the rotating shaft 6 71 is located between the front shell 62 and the rear shell 63, and is located in the groove 2 65.

[0057] Then the related structure of the second connector 83 is as follows: first, the front shell 62 and the rear shell 63 are both provided with a groove 1 64, and the end of the second connector 83 located in the connecting frame 6 is provided with a rotating shaft 5 84. Therefore, in actual use, the rotating shaft 5 84 is located between the front shell 62 and the rear shell 63, and is located in the groove 1 64.

[0058] Meanwhile, the structure between the second connecting member 83 and the first connecting member 81 is as follows: first, the first connecting member 81 is slotted for one end of the second connecting member 83 to be inserted, and the connection is achieved through the connecting shaft 85 .

[0059] like Figure 3 and Fig. 9 As shown, the relevant structure of the brake assembly 9 is: first, the telescopic tube 5 includes an outer tube 51 and an inner tube 52 movably set on the outer tube 51, and the top of the inner tube 52 is connected to the mounting frame 4, and the outer tube 51 is connected to the seat foot 2, and the bottom of the outer tube 51 passes through the seat foot 2 and is exposed.

[0060] At the same time, a placement groove 511 is opened at the bottom of the outer tube 51, and a brake assembly 9 is arranged in the placement groove 511, and the brake assembly 9 includes a base 91, a spring 92 and a wire drawing 93, and a spring 92 is arranged between the base 91 and the placement groove 511, and one end of the wire drawing is connected to the base 91, and the other end of the wire drawing 93 is connected to the switch 11 at the bottom of the seat cushion 1.

[0061] Therefore, in actual use, the base 91 is forced upward by the wire drawing 93, and the force applied to the base 91 by the wire drawing 93 is released by rotating the switch 11. At this time, the base 91 moves downward due to the spring 92 to limit movement.

[0062] The wire drawing 93 is a long wire, and only a part of it is shown in the figure, and the switch 11 can be two and symmetrical to each other, so as to facilitate operation.

[0063] Then the structure between the wire drawing 93 and the base 91 is: first, the base 91 has a built-in rocker arm 94 and a mounting member 95, and one end of the rocker arm 94 is rotatably connected to the bottom surface of the placement groove 511, and the other end of the rocker arm 94 is connected to the wire drawing 93, and the mounting member 95 is connected to the rocker arm 94, and moves up and down with the swing of the rocker arm 94, and the bottom of the mounting member 95 is connected to the base 91.

[0064] Therefore, in actual use, the wire drawing 93 applies force to the rocker arm 94 so that the mounting member 95 drives the base 91 to move upward, and the wire drawing 93 is driven to relax the force applied to the rocker arm 94 by rotating the switch 11. At this time, the base 91 moves downward due to the spring 92 to limit the movement.

[0065] One end of the rocker arm 94 is rotatably connected to the connecting plate 96, and the mounting member 95 is connected to the rocker arm 94 via an axis, and the mounting member 95 is provided with an axis passing through the bottom surface of the placement groove 511, thereby playing a limiting role when moving and avoiding displacement during up and down movement.

[0066] Moreover, the base 91 and the mounting member 95 are connected by screws, and the base 91 is provided with a hollow mounting shaft 97, and the spring 92 is sleeved on the outside of the mounting shaft 97. At the same time, the mounting shaft 97 passes through the bottom surface of the placement groove 511 and is provided with a screw, and the nut diameter of the screw is larger than the hole opened in the outer tube 51, thereby preventing the base 91 from detaching, and the hole opened in the outer tube 51 is adapted to the mounting shaft 97 to play a limiting role, thereby preventing displacement during up and down movement.

[0067] Secondly, an anti-skid pad 98 is arranged at the bottom of the base 91, and the base 91 and the anti-skid pad 98 are connected by screws.

[0068] like Figure 3 and Figure 8 As shown, the related structure of the telescopic tube 5 is: the telescopic tube 5 includes an outer tube 51 and an inner tube 52 movably arranged on the outer tube 51, and the top of the inner tube 52 is connected to the mounting frame 4, and the outer tube 51 is connected to the seat foot 2, and the bottom of the outer tube 51 passes through the seat foot 2 and is provided with a brake assembly 9 that can limit movement.

[0069] At the same time, the structure between the outer tube 51 and the inner tube 52 is as follows: first, a hollow rod 53 is built into the outer tube 51, and a nut 531 is provided on the top of the rod 53, and a connecting sleeve 54 is built into the inner tube 52, and a screw 55 is provided at the bottom of the connecting sleeve 54, and a bevel gear 1 is provided at one end of the screw 55, and the other end of the screw 55 passes through the nut 531 and is located in the rod 53, and a rotating rod 10 passes through the connecting sleeve 54, and the rotating rod 10 is provided with a bevel gear 2 meshing with the bevel gear 1.

[0070] Therefore, in actual use, the transmission rotating rod 10 drives the bevel gear 2 to rotate, which in turn drives the bevel gear 1 to rotate and drives the screw 55 to rotate, and the screw 55 is driven to rise through the threaded connection between the screw 55 and the nut 531, thereby driving the inner tube 52 to rise.

[0071] The bottom of the rod 53 is connected to the outer tube 51 by screws, and when the bottom of the screw rod 55 is matched with the screw, it means that it has moved to the bottom, and a bottom cover 56 is provided at the bottom of the inner tube 52 to protect the internal structure. The structure between the seat foot 2 and the outer tube 51 is as follows: first, a cover 22 is provided on the top of the seat foot 2, and a limit plate is provided on the outer side of the outer tube 51, and the limit plate is located between the cover 22 and the seat foot 2.

[0072] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. At the same time, the utility model is not limited by the above embodiments, so without departing from the principle and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model claimed for protection.

Claims

1. A chair with a reclining back, characterized in that: The seat cushion (1) comprises a seat foot (2) and a backrest (3), wherein a mounting frame (4) is arranged below the seat cushion (1), and the mounting frame (4) is connected to the seat foot (2) via a telescopic tube (5), the bottom of the seat foot (2) is provided with a wheel (21) so as to be movable, and the bottom of the telescopic tube (5) passes through the seat foot (2) and is provided with a brake assembly (9) capable of limiting movement; A rotatable connecting rod (41) is provided between one end of the mounting frame (4) and the seat cushion (1), and the other end of the mounting frame (4) is rotatably connected to a connecting frame (6), and the connecting frame (6) is provided with the backrest (3), and the connecting frame (6) is rotatably connected to the other end of the seat cushion (1), and when the seat cushion (1) is subjected to force to move downward and forward, the end of the connecting frame (6) connected to the seat cushion (1) is driven to move downward and forward synchronously, so that the end of the connecting frame (6) connected to the backrest (3) moves forward, thereby driving the backrest (3) to fit the child's back; The bottom of the telescopic tube (5) is provided with a placement groove (511), and the brake assembly (9) is arranged in the placement groove (511), and the brake assembly (9) comprises a base (91), a spring (92) and a wire drawing (93), a spring (92) is arranged between the base (91) and the placement groove (511), and one end of the wire drawing is connected to the base (91), and the other end of the wire drawing (93) is connected to the switch (11) at the bottom of the seat cushion (1); The base (91) is driven upward by applying force to the base (91) through the wire drawing (93), and the force applied to the base (91) is released by rotating the switch (11). At this time, the base (91) is driven downward by the spring (92) to limit movement.

2. The seat with a retractable backrest according to claim 1, characterized in that: A gas spring (7) is provided between the mounting frame (4) and the connecting frame (6); when the child leaves the seat cushion (1), the connecting frame (6) will be reset due to the gas spring (7), thereby driving the seat cushion (1) to reset.

3. A retractable seat according to claim 2, characterized in that: An assembly frame (8) is arranged between the backrest (3) and the connecting frame (6), and the assembly frame (8) comprises a first connecting member (81), an elastic member (82) is arranged between the first connecting member (81) and the backrest (3), and a second connecting member (83) is arranged between the first connecting member (81) and the connecting frame (6); The second connecting member (83) penetrates into the connecting frame (6) and is rotatably connected to the connecting frame (6), and a U-shaped tube (61) is provided in the connecting frame (6), and the gas spring (7) is connected to the mounting frame (4) through one end of the U-shaped tube (61), and the other end of the U-shaped tube (61) passes through the second connecting member (83).

4. The seat with a retractable backrest according to claim 1, characterized in that: The base (91) has a built-in swing rod (94) and a mounting member (95), and one end of the swing rod (94) is rotatably connected to the bottom surface of the placement groove (511), and the other end of the swing rod (94) is connected to the wire drawing (93). The mounting member (95) is connected to the swing rod (94) and moves up and down as the swing rod (94) swings, and the bottom of the mounting member (95) is connected to the base (91). The wire drawing (93) applies force to the swing rod (94) so ​​that the mounting member (95) drives the base (91) to move upward, and the switch (11) is turned to drive the wire drawing (93) to relax the force applied to the swing rod (94). At this time, the base (91) moves downward due to the spring (92) to limit movement; Or / and, the telescopic tube (5) comprises an outer tube (51) and an inner tube (52) movably arranged on the outer tube (51), and the top of the inner tube (52) is connected to the mounting frame (4), the outer tube (51) is connected to the seat foot (2), and the bottom of the outer tube (51) passes through the seat foot (2) and is exposed, and a placement groove (511) is provided at the bottom of the outer tube (51).

5. A retractable seat according to any one of claims 1 to 3, characterized in that: The telescopic tube (5) comprises an outer tube (51) and an inner tube (52) movably arranged on the outer tube (51), wherein the top of the inner tube (52) is connected to the mounting frame (4), and the outer tube (51) is connected to the seat foot (2), and the bottom of the outer tube (51) passes through the seat foot (2) and is provided with a brake assembly (9) capable of limiting movement; The outer tube (51) has a hollow rod (53) built in, and a nut (531) is provided at the top of the rod (53); the inner tube (52) has a connecting sleeve (54) built in, and a screw (55) is provided at the bottom of the connecting sleeve (54); one end of the screw (55) is provided with a bevel gear 1, and the other end of the screw (55) passes through the nut (531) and is located in the rod (53); a rotating rod (10) passes through the connecting sleeve (54), and the rotating rod (10) is provided with a bevel gear 2 meshing with the bevel gear 1, and the rotating rod (10) is driven to rotate the bevel gear 2, thereby driving the bevel gear 1 to rotate and driving the screw (55) to rotate, and the screw (55) is driven to rise through the threaded connection between the screw (55) and the nut (531), thereby driving the inner tube (52) to rise.

6. A retractable seat according to any one of claims 1 to 3, characterized in that: One end of the connecting rod (41) is connected to the seat cushion (1) via a first rotating shaft (411), and the other end of the connecting rod (41) is connected to the mounting frame (4) via a second rotating shaft (412); a limiting portion (413) is provided at the end of the connecting rod (41) connected to the mounting frame (4); the mounting frame (4) is provided with an opening (44) for the limiting portion (413) to enter; a protrusion (45) is provided on the inner wall of the mounting frame (4), and the limiting portion (413) abuts against the protrusion (45) to limit the limiting portion (413) from moving downward.

7. A retractable seat according to any one of claims 1 to 3, characterized in that: The seat cushion (1) is provided with a connecting portion 1 (12) at one end connected to the connecting frame (6), and the connecting frame (6) is provided with a groove for the connecting portion 1 (12) to be placed thereon, and the connecting frame (6) and the connecting portion 1 (12) are connected via a rotating shaft 3 (13); Or / and, the mounting frame (4) is grooved for the bottom of the connecting frame (6) to be placed, and the connecting frame (6) and the mounting frame (4) are connected via a fourth rotating shaft (66).

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