Structure for adjusting height of cushion

Abstract

The utility model relates to the technical field of study chairs, in particular to a structure for adjusting the height of a cushion, which comprises a base and a mounting rack, the mounting rack comprises an inner tube and an outer tube, and the cushion is arranged on the outer tube; a push rod and an air spring are arranged between the inner pipe and the outer pipe, the air spring comprises a piston rod, the top of the piston rod is connected with the push rod and the outer pipe, a first swing rod is arranged in the inner pipe, one end of the first swing rod is rotationally arranged in the inner pipe, and the other end of the first swing rod makes contact with the bottom of the push rod. A pedal is arranged at the bottom of the base, one end of the pedal enters the inner pipe, and the first swing rod is located between the pedal and the push rod. A first switch is arranged at the bottom of the cushion and connected with the other end of the first swing rod through a rope. Therefore, the movement of the outer pipe is realized by treading the pedal or rotating the switch I so as to realize the movement of the seat cushion, the air spring is matched for limiting, and compared with the matching of a plurality of holes and screws, the seat cushion disclosed by the utility model is more convenient to operate and is time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of learning chairs, in particular to a structure for adjusting the height of a seat cushion. Background Art

[0002] The learning chair is a learning aid specially designed for children, aiming to provide a comfortable and healthy learning environment, help children maintain a correct sitting posture, and prevent myopia and spinal problems. In order to adapt to children of different heights and body shapes, an adjustment structure is also provided, including an adjustment structure for adjusting the height of the seat cushion. The commonly used adjustment structure for the height of the seat cushion includes an inner and outer tube, and a plurality of limit holes are opened on the outer side of the outer tube, and a screw is passed through one of the limit holes and connected to the inner tube thread to achieve positioning, and then the height is adjusted by passing the screw through the limit holes at different positions. However, since each adjustment needs to be removed, then moved and installed again, the operation is time-consuming and laborious. Summary of the invention

[0003] The purpose of the utility model is to provide a structure for adjusting the height of a seat cushion. By stepping on a pedal or turning a switch, the movement of an outer tube and thus the movement of the seat cushion is achieved, and a gas spring is used for limiting the position. Compared with the adaptation of multiple holes and screws, the utility model is more convenient to operate and saves time and effort, thus solving the problem that the existing height adjustment is time-consuming and labor-intensive.

[0004] The purpose of the utility model is achieved in this way:

[0005] A structure for adjusting the height of a seat cushion, comprising a base and a mounting frame arranged on the base, wherein the mounting frame comprises an inner tube and a movable outer tube, and a seat cushion is arranged on the outer tube;

[0006] A push rod and a gas spring are arranged between the inner tube and the outer tube, and the gas spring includes a movable piston rod, and the top of the piston rod is connected to the push rod and the outer tube respectively, and a swing rod 1 is arranged inside the inner tube, and one end of the swing rod 1 is rotatably arranged in the inner tube, and the other end of the swing rod 1 is in contact with the bottom of the push rod;

[0007] A pedal is provided at the bottom of the base, and one end of the pedal enters the inner tube, and the rocker rod 1 is located between the pedal and the push rod, and the other end of the pedal is located outside the base, and by stepping down on the outer end of the pedal, the inner end of the pedal is driven to move upward, thereby driving the rocker rod 1 and the push rod to move upward, and driving the piston rod and the outer tube to move upward;

[0008] A switch 1 is provided at the bottom of the seat cushion, and the switch 1 is connected to the other end of the swing rod 1 through a rope. By rotating the switch 1, the rope is driven to pull the swing rod 1 upward, thereby driving the push rod to move upward and driving the piston rod and the outer tube to move upward.

[0009] Preferably, the outer tube is internally provided with a mounting plate 1, and the mounting plate 1 has holes corresponding to the piston rod and the push rod and is sleeved on the outside of the piston rod and the push rod, and the piston rod is connected to the outer tube via a fastener;

[0010] Or / and, the inner tube has a mounting plate 2 built in, and one end of the rocker arm 1 is rotatably set on the mounting plate 2, and the bottom of the push rod passes through the mounting plate 2 and contacts with the other end of the rocker arm 1, and the bottom of the gas spring is set on the mounting plate 2.

[0011] Preferably, the base is provided with a channel, and the bottom of the inner tube is located in the channel, the pedal comprises a treading member and a rotatable connecting rod, one end of the connecting rod is connected to the treading member, and the other end of the connecting rod is located in the inner tube and contacts with a bottom of the swing rod;

[0012] A baffle is arranged at the bottom of the base below the channel, and a connecting rod is located between the baffle and the base and is rotatably arranged on the baffle, and a spring 1 is arranged between one end of the connecting rod connected to the pedal and the baffle, and the spring 1 is used to restore the downwardly moved pedal.

[0013] Preferably, switch 1 is provided on both sides of the bottom of the seat cushion.

[0014] Preferably, the bottom of the base is provided with wheels so as to be movable, and the base is provided with a through hole, and a brake assembly for limiting the movement of the base is provided in the through hole, and a cover plate is provided on the top of the base above the through hole;

[0015] The brake assembly includes a mounting seat, a second spring and a brake line, wherein the second spring is arranged between the mounting seat and the cover plate, one end of the brake line is connected to the mounting seat, and the other end of the brake line is connected to the second switch at the bottom of the seat cushion;

[0016] The mounting seat is driven upward by applying force to the mounting seat through the brake line, and the force applied to the mounting seat by the brake line is released by rotating the second switch. At this time, the mounting seat moves downward due to the second spring to limit movement.

[0017] Preferably, the mounting seat has a second rocker arm and a mounting piece built therein, and one end of the second rocker arm is rotatably connected to the bottom surface of the cover plate, and the other end of the second rocker arm is connected to the brake line. The mounting piece is connected to the second rocker arm and moves up and down as the second rocker arm swings, and the bottom of the mounting piece is connected to the mounting seat. The brake line applies force to the second rocker arm so that the mounting piece drives the mounting seat to move upward, and the brake line is driven to relax the force applied to the second rocker arm by rotating the second switch. At this time, the mounting seat moves downward due to the second spring to limit the movement.

[0018] Preferably, the outer tube is provided with a connecting seat that can move up and down, and the connecting seat is provided with a connecting piece that can move forward and backward, and a backrest is provided at one end of the connecting piece, and the other end of the connecting piece is located in the connecting seat and a spring is provided between the connecting seat and the connecting seat;

[0019] The connection seat is provided with side openings and rotatable limit pieces on both sides, and the limit pieces are provided with a plurality of protrusions. In addition, a plurality of slots are provided on both sides of the connection piece, and the movement of the connection piece is limited by the protrusions being located in the slots, and the protrusions and the slots are separated by rotating the limit pieces.

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

[0021] The utility model realizes the movement of the outer tube and the seat cushion by stepping on the pedal or turning the switch 1, and cooperates with the gas spring for position limiting. Compared with the adaptation of multiple holes and screws, the utility model is more convenient to operate and saves time and effort. Moreover, there are two adjustment methods, so consumers can choose according to the current situation. For example, when sitting, you can use the switch 1, and when standing, you can use the pedal, which is more convenient. 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 Schematic diagram of the inner tube, outer tube and related structures.

[0025] Figure 4 for Figure 3 Schematic diagram of the partially disassembled structure.

[0026] Figure 5 It is a schematic diagram of the structure of the base and pedal.

[0027] Figure 6 It is a schematic diagram of the structure related to the seat cushion and the rocker arm.

[0028] Figure 7 A schematic diagram of the structure of the brake assembly.

[0029] Figure 8 It is a schematic diagram of the structure related to the backrest.

[0030] Fig. 9 for Figure 8 Schematic diagram of the split structure.

[0031] Reference numerals: 1-base; 11-channel; 12-baffle; 121-side plate; 13-wheel; 14-through hole;

[0032] 15-cover plate; 2-inner tube; 21-swing rod 1; 22-mounting plate 2; 23-assembly plate; 3-outer tube;

[0033] 31-mounting plate 1; 4-seat cushion; 5-connecting seat; 51-spring 3; 52-limiting member; 521-protrusion;

[0034] 53-side port; 6-gas spring; 61-piston rod; 7-pedal; 71-treadle member; 72-connecting rod;

[0035] 73-spring 1; 8-connecting piece; 81-slot; 91-mounting seat; 92-spring 2; 93-rocker 2;

[0036] 931-long hole; 932-mounting shaft; 94-mounting piece; 95-anti-slip pad; 96-connecting plate; 10-push rod;

[0037] 20- switch one; 30- backrest; 40- knob; 50- switch two; 60- elastic member. DETAILED DESCRIPTION

[0038] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0039] like Figure 1-Figure 9 As shown, the structure for adjusting the height of the seat cushion comprises a base 1 and a mounting frame arranged on the base 1, and the mounting frame comprises an inner tube 2 and a movable outer tube 3, and a seat cushion 4 is arranged on the outer tube 3.

[0040] At the same time, a push rod 10 and a gas spring 6 are arranged between the inner tube 2 and the outer tube 3, and the gas spring 6 includes a movable piston rod 61, and the top of the piston rod 61 is respectively connected to the push rod 10 and the outer tube 3, the inner tube 2 has a built-in rocker arm 21, and one end of the rocker arm 21 is rotatably arranged in the inner tube 2, and the other end of the rocker arm 21 contacts the bottom of the push rod 10.

[0041] The end of the rocker arm 21 that contacts the push rod 10 is provided with a drive, and the drive may be a rope or a pedal 7.

[0042] When the pedal 7 is used, the structure is as follows: first, the pedal 7 is arranged at the bottom of the base 1, and one end of the pedal 7 enters the inner tube 2, and the swing rod 1 21 is located between the pedal 7 and the push rod 10, and the other end of the pedal 7 is located outside the base 1. Therefore, in actual use, by stepping down on the outer end of the pedal 7, the inner end of the pedal 7 is driven to move upward, thereby driving the swing rod 1 21 and the push rod 10 to move upward, and driving the piston rod 61 and the outer tube 3 to move upward.

[0043] When the rope is used, the structure is as follows: first, a switch 20 is provided at the bottom of the seat cushion 4, and the switch 20 is connected to the other end of the swing rod 21 through the rope. Therefore, in actual use, by rotating the switch 20, the rope is driven to pull the swing rod 21 upward, thereby driving the push rod 10 to move upward and driving the piston rod 61 and the outer tube 3 to move upward.

[0044] Therefore, the utility model realizes the movement of the outer tube 3 and the seat cushion 4 by stepping on the pedal 7 or turning the switch 20, and cooperates with the gas spring 6 for position limiting. Compared with the adaptation of multiple holes and screws, the utility model is more convenient to operate and saves time and effort. Moreover, there are two adjustment methods, so consumers can choose according to the current situation. For example, when sitting, they can use the switch 20, and when standing, they can use the pedal 7, which is more convenient.

[0045] Moreover, the seat cushion 4 can move forward and backward, that is, a fixed tube is provided at the bottom of the seat cushion 4, and a movable tube is provided on the outer tube 3, and one end of the movable tube is located in the fixed tube and can move, and then the limiting structure can be diverse, such as a multi-hole with screws, or a screw structure.

[0046] In addition, switches 20 are provided on both sides of the bottom of the seat cushion 4, so that it is more convenient to use, that is, both sides can be adjusted.

[0047] like Figure 2-Figure 6 As shown, the structure of the upper and lower ends of the push rod 10 and the gas spring 6 is that first, a mounting plate 31 is built into the outer tube 3, and the mounting plate 31 has holes corresponding to the piston rod 61 and the push rod 10 and is sleeved on the outside of the piston rod 61 and the push rod 10, and the piston rod 61 is connected to the outer tube 3 by fasteners.

[0048] Therefore, in actual use, the synchronous movement of the piston rod 61 and the push rod 10 is achieved through the mounting plate 31, and the fastener is a screw, and a cover is also provided on the top of the outer tube 3. The fastener passes through the cover and penetrates into the outer tube 3 to be connected with the piston rod 61.

[0049] At the same time, the inner tube 2 has a mounting plate 22 built in, and one end of the rocker arm 21 is rotatably set on the mounting plate 22, and the bottom of the push rod 10 passes through the mounting plate 22 and contacts with the other end of the rocker arm 21, and the bottom of the gas spring 6 is set on the mounting plate 22.

[0050] Therefore, in actual use, different components are respectively provided on the upper and lower sides of the second mounting plate 22, thereby reducing the number of components and making the components more compact.

[0051] Of course, there can also be multiple components, that is, an assembly plate 23 is set at the bottom of the mounting plate 22, and one end of the rocker arm 21 is rotatably set on the assembly plate 23, and two plates are set on the assembly plate 23, and an axis passes through the rocker arm 21 and the two plates so that the rocker arm 21 is rotatably set on the assembly plate 23.

[0052] like Figure 2-Figure 6As shown, the structure of the pedal 7 is as follows: first, the base 1 is provided with a channel 11, and the bottom of the inner tube 2 is located in the channel 11, and the pedal 7 includes a pedal 71 and a rotatable connecting rod 72, and one end of the connecting rod 72 is connected to the pedal 71, and the other end of the connecting rod 72 is located in the inner tube 2 and contacts with the bottom of the rocker arm 21.

[0053] At the same time, a baffle 12 is arranged at the bottom of the base 1 below the channel 11, and a connecting rod 72 is located between the baffle 12 and the base 1 and is rotatably arranged on the baffle 12, and a spring 73 is arranged between one end of the connecting rod 72 connected to the pedal 71 and the baffle 12, and the spring 73 is used to restore the downwardly moved pedal 71.

[0054] Therefore, in actual use, the structure of the inner tube 2 can be exposed through the channel 11, and the baffle 12 is provided to cover and protect the exposed structure. Moreover, the rotation structure of the connecting rod 72 is as follows: first, two side plates 121 are provided on the baffle 12, and a rod is provided between the two side plates 121, and the rod passes through the connecting rod 72 so that the connecting rod 72 is rotated and set at the bottom of the base 1. At the same time, in order to facilitate the rotation of the connecting rod 72, the baffle 12 has corresponding grooves.

[0055] like Figure 1 , Figure 2 and Figure 7 As shown, the base 1 is provided with wheels 13 at the bottom so as to be movable, and the base 1 is provided with a through hole 14 , and a brake assembly for limiting the movement of the base 1 is provided in the through hole 14 , and a cover plate 15 is provided at the top of the base 1 above the through hole 14 .

[0056] At the same time, the brake assembly includes a mounting seat 91, a spring 92 and a brake line, wherein a spring 92 is arranged between the mounting seat 91 and the cover plate 15, and one end of the brake line is connected to the mounting seat 91, and the other end of the brake line is connected to the switch 50 at the bottom of the seat cushion 4.

[0057] Therefore, in actual use, the mounting seat 91 is forced to move upward by the brake line, and the force applied to the mounting seat 91 by the rotating switch 50 is released by the brake line. At this time, the mounting seat 91 moves downward due to the spring 92 to limit the movement.

[0058] Secondly, the specific details of the structure are as follows: first, the mounting seat 91 has a built-in rocker arm 93 and a mounting member 94, and one end of the rocker arm 93 is rotatably connected to the bottom surface of the cover plate 15, and the other end of the rocker arm 93 is connected to the brake line, and the mounting member 94 is connected to the rocker arm 93, and moves up and down with the swing of the rocker arm 93, and the bottom of the mounting member 94 is connected to the mounting seat 91.

[0059] Therefore, in actual use, the brake line applies force to the rocker arm 2 93 so that the mounting member 94 drives the mounting seat 91 to move upward, and the brake line is driven to relax the force applied to the rocker arm 2 93 by rotating the switch 2 50. At this time, the mounting seat 91 moves downward due to the spring 2 92 to limit the movement.

[0060] The second swing rod 93 is connected to the connecting plate 96 at the bottom of the cover plate 15 through an axis so that the second swing rod 93 is rotatably arranged at the bottom of the cover plate 15. In addition, the cover plate 15 is provided with bolts, and the second spring 92 is sleeved on the outside of the bolts, so as to realize the installation of the second spring 92.

[0061] Meanwhile, the structure between the second swing rod 93 and the mounting member 94 is as follows: first, the second swing rod 93 is provided with an elongated hole 931, and a movable mounting shaft 932 is provided on the elongated hole 931, and the mounting member 94 is slotted for placing the second swing rod 93. Therefore, in actual use, the mounting member 94 and the second swing rod 93 are connected by the mounting shaft 932 passing through the mounting member 94 and the second swing rod 93, and the mounting shaft 932 can move in the elongated hole 931 to drive the mounting member 94 to move up and down.

[0062] Secondly, in order to better limit the position, an anti-skid pad 95 is provided at the bottom of the mounting seat 91 .

[0063] like Figure 8 and Fig. 9 As shown, the study chair also includes a backrest 30, and the backrest 30 will move with the movement of the outer tube 3, and the backrest 30 will also move forward and backward. Its structure is: first, a connecting seat 5 that can move up and down is provided on the outer tube 3, and a connecting member 8 that can move forward and backward is provided on the connecting seat 5, and the backrest 30 is provided at one end of the connecting member 8, and the other end of the connecting member 8 is located in the connecting seat 5 and a spring 51 is provided between the connecting seat 5.

[0064] At the same time, a structure for limiting movement is arranged between the connecting seat 5 and the connecting member 8. The limiting structure is various. One example is given here. First, side openings 53 and rotatable limiting members 52 are arranged on both sides of the connecting seat 5, and the limiting members 52 are arranged with a plurality of protrusions 521. In addition, a plurality of slots 81 are opened on both sides of the connecting member 8.

[0065] Therefore, in actual use, the projection 521 is located in the slot 81 to limit the movement of the connector 8, and the stopper 52 is rotated to separate the projection 521 and the slot 81. The projection 521 is adapted to the slots 81 at different positions to adjust the position. The backrest 30 also moves relative to the outer tube 3. The specific structure is as follows: first, the outer tube 3 is provided with a plurality of holes, and a knob 40 passes through the connection seat 5 to connect with the holes on the outer tube 3, and is connected with the holes at different positions to adjust the position.

[0066] At the same time, an elastic member 60 is provided between the backrest 30 and the connecting member 8, so that fine adjustments can be made to provide a more comfortable fit.

[0067] 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 structure for adjusting the height of a seat cushion, characterized in that: It comprises a base (1) and a mounting frame arranged on the base (1), wherein the mounting frame comprises an inner tube (2) and a movable outer tube (3), and a seat cushion (4) is arranged on the outer tube (3); A push rod (10) and a gas spring (6) are arranged between the inner tube (2) and the outer tube (3), and the gas spring (6) comprises a movable piston rod (61), and the top of the piston rod (61) is respectively connected to the push rod (10) and the outer tube (3), and a swing rod (21) is built into the inner tube (2), and one end of the swing rod (21) is rotatably arranged in the inner tube (2), and the other end of the swing rod (21) is in contact with the bottom of the push rod (10); A pedal (7) is provided at the bottom of the base (1), and one end of the pedal (7) enters into the inner tube (2), and a rocker rod (21) is located between the pedal (7) and the push rod (10), and the other end of the pedal (7) is located outside the base (1), and by pressing down on the outer end of the pedal (7), the inner end of the pedal (7) is driven to move upward, thereby driving the rocker rod (21) and the push rod (10) to move upward, and driving the piston rod (61) and the outer tube (3) to move upward; A switch (20) is provided at the bottom of the seat cushion (4), and the switch (20) is connected to the other end of the swing rod (21) via a rope. By rotating the switch (20), the rope is driven to pull the swing rod (21) upward, thereby driving the push rod (10) to move upward and driving the piston rod (61) and the outer tube (3) to move upward.

2. The structure for adjusting the height of a seat cushion according to claim 1, characterized in that: The outer tube (3) has a mounting plate (31) built therein, and the mounting plate (31) has holes corresponding to the piston rod (61) and the push rod (10) and is sleeved on the outside of the piston rod (61) and the push rod (10), and the piston rod (61) is connected to the outer tube (3) via a fastener; Or / and, the inner tube (2) has a second mounting plate (22) built in, and one end of the first rocker arm (21) is rotatably mounted on the second mounting plate (22), and the bottom of the push rod (10) passes through the second mounting plate (22) and contacts the other end of the first rocker arm (21), and the bottom of the gas spring (6) is mounted on the second mounting plate (22).

3. The structure for adjusting the height of a seat cushion according to claim 1, characterized in that: The base (1) is provided with a channel (11), and the bottom of the inner tube (2) is located in the channel (11); the pedal (7) comprises a treading member (71) and a rotatable connecting rod (72), and one end of the connecting rod (72) is connected to the treading member (71), and the other end of the connecting rod (72) is located in the inner tube (2) and contacts the bottom of the first swing rod (21); A baffle (12) is arranged at the bottom of the base (1) below the channel (11), and a connecting rod (72) is located between the baffle (12) and the base (1) and is rotatably arranged on the baffle (12), and a spring (73) is arranged between one end of the connecting rod (72) connected to the pedal member (71) and the baffle (12), and the spring (73) is used to restore the pedal member (71) that has moved downward.

4. The structure for adjusting the height of a seat cushion according to any one of claims 1 to 3, characterized in that: Switch 1 (20) is provided on both sides of the bottom of the seat cushion (4).

5. The structure for adjusting the height of a seat cushion according to any one of claims 1 to 3, characterized in that: The base (1) is provided with wheels (13) at the bottom so as to be movable, and the base (1) is provided with a through hole (14), and a brake assembly for limiting the movement of the base (1) is provided in the through hole (14), and a cover plate (15) is provided at the top of the base (1) above the through hole (14); The brake assembly comprises a mounting seat (91), a second spring (92) and a brake line, wherein the second spring (92) is arranged between the mounting seat (91) and the cover plate (15), one end of the brake line is connected to the mounting seat (91), and the other end of the brake line is connected to a second switch (50) at the bottom of the seat cushion (4); The mounting seat (91) is driven upward by applying force to the mounting seat (91) through the brake line, and the force applied to the mounting seat (91) is released by rotating the second switch (50). At this time, the mounting seat (91) is driven downward by the second spring (92) to limit movement.

6. The structure for adjusting the height of a seat cushion according to claim 5, characterized in that: The mounting seat (91) has a second swing rod (93) and a mounting member (94) built therein, and one end of the second swing rod (93) is rotatably connected to the bottom surface of the cover plate (15), and the other end of the second swing rod (93) is connected to the brake line. The mounting member (94) is connected to the second swing rod (93) and moves up and down as the second swing rod (93) swings, and the bottom of the mounting member (94) is connected to the mounting seat (91). The brake line applies force to the second swing rod (93) so that the mounting member (94) drives the mounting seat (91) to move upward, and the second switch (50) is turned to drive the brake line to relax the force applied to the second swing rod (93). At this time, the mounting seat (91) moves downward due to the second spring (92) to limit movement.

7. The structure for adjusting the height of a seat cushion according to any one of claims 1 to 3, characterized in that: The outer tube (3) is provided with a connecting seat (5) that can move up and down, and the connecting seat (5) is provided with a connecting piece (8) that can move forward and backward, and a backrest (30) is provided at one end of the connecting piece (8), and the other end of the connecting piece (8) is located in the connecting seat (5) and a spring (51) is provided between the connecting seat (5); The connecting seat (5) is provided with side openings (53) and rotatable limiting members (52) on both sides, and the limiting members (52) are provided with a plurality of protrusions (521). In addition, a plurality of clamping grooves (81) are provided on both sides of the connecting member (8), and the movement of the connecting member (8) is restricted by the protrusions (521) being located in the clamping grooves (81), and the protrusions (521) and the clamping grooves (81) are separated by rotating the limiting members (52).

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