CN216627955U - Four-back waist-supporting learning chair - Google Patents

Abstract

The utility model relates to the technical field of learning chairs, in particular to a four-back waist-supporting learning chair, which comprises: the seat cushion comprises a base, a seat cushion and a backrest component, wherein a supporting rod is arranged on the base, a seat cushion and the backrest component are arranged on the supporting rod, the backrest component is positioned above the seat cushion, and a space for a user to lean is formed between the backrest component and the seat cushion; the backrest component comprises a headrest, a waist pillow, two back pillows and a connecting frame connected with the supporting rod, wherein the two back pillows are arranged on one side of the connecting frame, the connecting frame is provided with a hollow connecting rod in a penetrating mode, a first mounting rod capable of moving up and down and a second mounting rod capable of moving back and forth are arranged at the upper end and the lower end of the connecting rod respectively, the headrest is arranged on the first mounting rod in a rotating mode, and the waist pillow is connected with the second mounting rod. Therefore, the utility model can support and lean against the head, the neck and the waist, and realizes the rotation and the movement of the headrest and the movement of the waist pillow, thereby being capable of being adjusted by a user and further being suitable for different users.

Description

Four-back waist-supporting learning chair

Technical Field

The utility model relates to the technical field of learning chairs, in particular to a four-back waist-supporting learning chair.

Background

The study chair is a chair on which a person sits when working on a table top in a sitting posture state, and is suitable for study and work. Moreover, the common learning chair is only capable of sitting and leaning because of the appearance of patent No. 2021304517569, namely the seat cushion and the back rest, and has no additional function, so that the waist and the neck can be tired even if the chair is sitting for a long time.

Moreover, even if a headrest is provided, for example, the appearance of patent No. 2020305015989, the headrest is fixed, so that the head and neck may not lean against the headrest for different users due to different heights, and even if the headrest is provided, the head and neck are not supported and leaned against.

Disclosure of Invention

The utility model aims to provide a four-back waist supporting learning chair, wherein a first mounting rod capable of moving up and down and a second mounting rod capable of moving back and forth are respectively arranged at the upper end and the lower end of a connecting rod, a headrest is rotatably arranged on the first mounting rod, and a waist pillow is connected with the second mounting rod, so that the rotation and the movement of the headrest and the movement of the waist pillow are realized, and the problems that the back is supported and the headrest is fixed in most of the prior art are solved.

The purpose of the utility model is realized as follows:

a four-back waist-supporting learning chair comprising:

the backrest comprises a base, a seat cushion, a backrest component, a backrest and a backrest seat, wherein a support rod is arranged on the base, a seat cushion and the backrest component are arranged on the support rod, the backrest component is positioned above the seat cushion, and a space for a user to lean against is formed between the backrest component and the seat cushion;

the backrest component comprises a headrest, a waist pillow, two back pillows and a connecting frame connected with the supporting rod, wherein the two back pillows are arranged on one side of the connecting frame, the connecting frame is provided with a hollow connecting rod in a penetrating mode, a first mounting rod capable of moving up and down and a second mounting rod capable of moving back and forth are arranged at the upper end and the lower end of the connecting rod respectively, the headrest is arranged on the first mounting rod in a rotating mode, and the waist pillow is connected with the second mounting rod.

Preferably, a third mounting rod is arranged between the headrest and the first mounting rod, the headrest is rotatably arranged on the third mounting rod, and the third mounting rod is rotatably arranged on the first mounting rod.

Preferably, the headrest is provided with two first mounting parts at one side close to the first mounting rod, one first mounting part is provided with a first mounting hole, the other first mounting part is provided with a first mounting groove, the top of the first mounting rod is positioned between the two first mounting parts and is provided with a third toothed hole, a first rotating part penetrates through the first mounting hole and the third toothed hole, and two ends of the first rotating part are respectively positioned in the first mounting hole and the first mounting groove;

the first rotating part is provided with a plurality of first protruding strips at the outer side, the first protruding strips are located in tooth grooves of the third toothed hole, and the first protruding strips are driven to rotate from one tooth groove of the third toothed hole to the other tooth groove by rotating the headrest and driving the first rotating part to rotate so as to rotate the headrest;

or one side of the headrest, which is close to the mounting rod III, is provided with two mounting parts I, one mounting part I is provided with a mounting hole I, the other mounting part I is provided with a gear, the top of the mounting rod III is positioned between the two mounting parts I and is provided with a mounting hole IV, and a pressing piece penetrates through the mounting hole I and the mounting hole IV and is connected with the gear;

mounting bar three has seted up tooth shape hole four in four one sides of mounting hole, thereby and the gear is located tooth shape hole four and is used for restricting the headrest and rotate, thereby promotes the gear through pressing down the pressing piece and leaves tooth shape hole four, and then rotatable headrest.

Preferably, two mounting parts III are symmetrically arranged at the bottoms of the mounting rods III, a mounting hole III is formed in one mounting part III in three openings, a mounting groove III is formed in the other mounting part III in three openings, the top of the mounting rod I is positioned between the two mounting parts III and provided with a toothed hole I, a rotating part III penetrates through the mounting hole III and the toothed hole I, and one end of the rotating part III is positioned in the mounting groove III;

the three outer sides of the rotating pieces are provided with a plurality of protruding strips III, the protruding strips III are located in tooth grooves of the first toothed holes, and the mounting rods III are rotated to drive the rotating pieces to rotate three times so as to drive the protruding strips to rotate from one tooth groove of the first toothed holes to the other tooth groove.

Preferably, one end of the third rotating part, which is far away from the third mounting groove, is provided with a third limiting block, the third mounting part provided with the third mounting hole is provided with a third square hole on one side of the third mounting hole, and the third limiting block is positioned in the third square hole so as to limit the relative rotation between the third rotating part and the third mounting rod.

Preferably, the supporting rod is obliquely arranged on the base, the connecting rod and the supporting rod are horizontally arranged, the connecting rod comprises a first connecting part and a second connecting part, and the first connecting part is positioned above the second connecting part and is vertically arranged with the second connecting part;

the first mounting rod is movably arranged at the top of the first connecting part, and the second mounting rod is movably arranged at one end of the second connecting part.

Preferably, a plurality of first positioning holes are formed in one side wall of the mounting rod, a first limiting hole is formed in one side wall of the connecting part, a first limiting piece penetrates through the first limiting hole and the first positioning hole in sequence to limit the first mounting rod to move, and the first limiting piece is moved outwards to enable the first limiting piece to leave the first positioning hole so as to move the first mounting rod;

or/and a plurality of second positioning holes are formed in two side walls of the mounting rod, second limiting holes are formed in two side walls of the connecting portion, a second limiting piece penetrates through the second limiting holes and the second positioning holes in sequence to limit the second mounting rod to move, and the second limiting piece is moved outwards to leave the second positioning holes so as to move the second mounting rod.

Preferably, the waist pillow is rotatably arranged on the second mounting rod, one side of the waist pillow, which is close to the second mounting rod, is provided with two second mounting parts, one second mounting part is provided with a second mounting hole, the other second mounting part is provided with a second mounting groove, the top of the second mounting rod is positioned between the two second mounting parts and is provided with a second toothed hole, the second rotating part penetrates through the second mounting hole and the second toothed hole, and one end of the second rotating part is positioned in the second mounting groove;

the two outer sides of the rotating piece are provided with a plurality of protruding strips II, the protruding strips are located in tooth grooves of the tooth-shaped holes II, and the waist pillow is rotated to drive the rotating piece II to rotate so as to drive the protruding strips II to rotate to another tooth groove from one tooth groove of the tooth-shaped holes II.

Preferably, the end, far away from the mounting groove III, of the second rotating part is provided with a second limiting block, the second mounting part provided with the second mounting hole is provided with a second square hole on one side of the second mounting hole, and the second limiting block is located in the second square hole to limit the relative rotation between the second rotating part and the waist pillow.

Preferably, the lower part of the back pillow is convex outwards, an elastic part is arranged between the lower part of the back pillow and the connecting frame, and the elastic part is used for restoring the back pillow moved by the user backwards.

Compared with the prior art, the utility model has the outstanding and beneficial technical effects that:

1. the backrest component is arranged, namely a headrest and a waist pillow are additionally arranged, so that the head, the neck and the waist are supported and abutted, meanwhile, a first mounting rod capable of moving up and down and a second mounting rod capable of moving back and forth are respectively arranged at the upper end and the lower end of the connecting rod, the headrest is rotatably arranged on the first mounting rod, and the waist pillow is connected with the second mounting rod, so that the rotation and the movement of the headrest and the movement of the waist pillow are realized, and a user can adjust the backrest component by himself, so that the backrest component is suitable for different users.

2. According to the preferred scheme of the utility model, the headrest is rotatably arranged on the mounting rod III, and the mounting rod III is rotatably arranged on the mounting rod I, so that the angle of the headrest at two places can be adjusted, the headrest can be adjusted to a more suitable position, the adjusting range is larger, and the headrest is suitable for more users.

3. According to the preferred scheme of the utility model, the first connecting part and the second connecting part are vertically arranged so as to be convenient for processing, and the support rod is obliquely arranged and the connecting rod and the support rod are horizontally arranged so as to enable the connecting rod to be obliquely arranged, so that the waist pillow can obliquely move back and forth, that is, the height can be adjusted and the front and back distance can be adjusted.

4. According to the preferred scheme of the utility model, the waist pillow is rotatably arranged on the second mounting rod, so that the angle of the side of the waist pillow, which is in contact with a human body, can be adjusted, and the waist pillow can be further suitable for different users.

5. According to the preferred scheme of the utility model, the lower part of the back pillow is protruded outwards, so that the shape of the back pillow is matched with that of the back of a human body, and a better supporting and leaning effect is achieved. Meanwhile, the elastic piece is arranged between the back pillow and the connecting frame, the comfort level of the back pillow can be increased through the pressure of a human body on the back pillow and the matching of the elastic piece, and the back pillow moved by a user after leaning back can be reset through the elastic piece.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a side view of the present invention.

Fig. 3 is a schematic structural view of the seat cushion and the support rod.

Fig. 4 is one of the structural diagrams of the headrest, the lumbar pillow, and the connecting rod.

Fig. 5 is a second schematic structural view of the head rest, the lumbar pillow and the connecting rod.

Fig. 6 is one of the structural views of the headrest and the connecting rod.

Fig. 7 is a second schematic view of the structure of the headrest and the connecting rod.

Fig. 8 is a schematic structural view of the mounting rod iii.

Fig. 9 is a schematic structural view of the lumbar pillow and the connecting rod.

Reference numerals: 1-a base; 2-a support rod; 21-positioning hole III; 22-positioning hole four; 3, cushion; 31-a seat cushion frame; 32-groove; 4-a backrest assembly; 40-an elastic member; 41-a headrest; 411-mounting part one;

412-mounting hole one; 413-mounting groove one; 414-square hole one; 42-waist pillow; 421-a second mounting part; 422-mounting hole II; 423-mounting groove two; 424-square hole two; 43-Back pillow; 44-a connecting frame; 45-connecting rod; 451-connecting part one; 452 — connecting part two; 453-first limiting hole; 454-a second limiting hole;

46-mounting the first rod; 461-toothed hole I; 462-positioning hole one; 47-mounting a second rod;

471-locating hole two; 472-toothed shaped hole two; 48-mounting a third rod; 481-toothed hole three; 482-mounting hole four; 483-toothed hole four; 484-mounting part three; 485-mounting hole three; 486-square hole three; 491-a first rotating part; 4911-convex strip I; 4912-rotation limiting block one; 493 pressing element;

4931-a rod; 494-gear wheel; 4941-an assembly section; 495-rotational member three; 4951-raised strips III; 4952-rotation limiting block II; 496-a spring; 497 a first position limiter; 498-two limit parts; 499-rotating part two;

4991-convex strip two; 4992-rotation limiting block III; 5-a third limiting part; 6-mounting a frame; 61-a connector; 7-a fourth limit part; 8-a kit; 9-a handrail; 10-a fifth limiting part; 20-wheels.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1 to 9, a four-back waist-supporting learning chair comprises: the seat comprises a base 1, wherein a supporting rod 2 is arranged on the base 1, a seat cushion 3 and a backrest component 4 are arranged on the supporting rod 2, the backrest component 4 is positioned above the seat cushion 3, and a space for a user to lean against is arranged between the backrest component 4 and the seat cushion 3. Wherein the bottom of the base 1 is provided with a plurality of wheels 20 so as to facilitate the movement of the whole chair.

Meanwhile, the backrest module 4 includes a headrest 41, a lumbar pillow 42, two back pillows 43 and a connecting frame 44 connected to the support rod 2, and the two back pillows 43 are disposed at one side of the connecting frame 44.

Therefore, in the actual use process, the headrest 41, the waist pillow 42 and the two back pillows 43 are arranged to support and abut four parts of a human body, so that a better comfort level is provided for a user, and compared with a backrest, namely only the back pillows, the waist pillow is additionally provided with the headrest 41 and the waist pillow 42, so that the head, neck and waist are supported and abutted, and the situation that the waist and the neck are tired is avoided.

Meanwhile, the connecting frame 44 is provided with a hollow connecting rod 45 in a penetrating manner, the upper end and the lower end of the connecting rod 45 are respectively provided with a first mounting rod 46 capable of moving up and down and a second mounting rod 47 capable of moving back and forth, the headrest 41 is rotatably arranged on the first mounting rod 46, and the waist pillow 42 is connected with the second mounting rod 47.

Therefore, in the actual use process, the headrest 41 is rotatably arranged on the first mounting rod 46, and the lumbar pillow 42 is connected with the second mounting rod 47, so that the rotation and the movement of the headrest 41 and the movement of the lumbar pillow 42 are realized, and the user can adjust the waist pillow by himself or herself, so that the waist pillow is suitable for different users.

As shown in fig. 4 and 5, in order to adjust the angle of the headrest 41 more preferably, a mounting rod three 48 is provided between the headrest 41 and the mounting rod one 46, the headrest 41 is rotatably provided on the mounting rod three 48, and the mounting rod three 48 is rotatably provided on the mounting rod one 46.

Therefore, in the actual use process, the headrest 41 is rotatably arranged on the mounting rod three 48, and the mounting rod three 48 is rotatably arranged on the mounting rod one 46, so that the position of the headrest 41 can be adjusted in two places, the headrest 41 can be adjusted to a more suitable position, the adjusting range is wider, and the headrest is suitable for more users.

Wherein, the rotating structure between the headrest 41 and the third mounting rod 48 is as follows: as shown in fig. 6, first, the headrest 41 is provided with two mounting portions one 411 at a side close to the mounting rod three 48, wherein one mounting portion one 411 is provided with a mounting hole one 412, and the other mounting portion one 411 is provided with a mounting groove one 413. And the top of the mounting rod three 48 is positioned between the two mounting parts one 411 and is provided with a toothed hole three 481, a rotating part one 491 penetrates through the mounting hole one 412 and the toothed hole three 481, and two ends of the rotating part one 491 are respectively positioned in the mounting hole one 412 and the mounting groove one 413.

Meanwhile, a plurality of convex strips I4911 are arranged on the outer side of the first rotating member 491, and the convex strips I4911 are positioned in tooth grooves of the tooth-shaped hole III 481. Therefore, in actual use, the headrest 41 is rotated by rotating the headrest 41 and driving the rotating member 491 to rotate, so as to drive the protruding strip 4911 to rotate from one tooth slot of the tooth-shaped hole three 481 to the other tooth slot, and further rotate the headrest 41.

In order to avoid the relative rotation between the headrest 41 and the rotating member 491, the rotating member 491 is provided with a first rotation limiting block 4912 at one end away from the first mounting slot, the first mounting portion 411 provided with the first mounting hole 412 is provided with a third square hole 414 at one side of the first mounting hole 412, and the first rotation limiting block 4912 is positioned in the third square hole 414 so as to limit the relative rotation between the headrest 41 and the rotating member 491.

And simultaneously, the rotating structure between the first mounting rod 46 and the third mounting rod 48 is as follows: as shown in fig. 6, first, two mounting portions 484 are symmetrically disposed at the bottom of the mounting rod three 48, wherein one mounting portion 484 is provided with a mounting hole three 485, and the other mounting portion three 484 is provided with a mounting groove three. And the top of the first mounting rod 46 is located between the two mounting portions 484 and is provided with a first toothed hole 461, a third rotating member 495 penetrates through the third mounting hole 485 and the first toothed hole 461, and one end of the third rotating member 495 is located in the third mounting groove.

Meanwhile, a plurality of protruding strips three 4951 are arranged on the outer side of the rotating member three 495, and the protruding strips three 4951 are located in the tooth grooves of the tooth holes one 461. Therefore, in actual use, the mounting rod three 48 is rotated and the rotating member three 495 is driven to rotate, so as to drive the protruding strip three 4951 to rotate from one tooth slot to the other tooth slot of the first tooth-shaped hole 461.

And in order to avoid the relative rotation between the rotating member 495 and the mounting rod three 48, one end of the rotating member 495, which is far away from the mounting groove three, is provided with a rotation limiting block three 4952, the mounting portion three 484 provided with a mounting hole three 485 is provided with a square hole three 486 at one side of the mounting hole three 485, and the rotation limiting block three 4952 is positioned in the square hole three 486 so as to limit the relative rotation between the rotating member 495 and the mounting rod three 48.

As shown in fig. 1 to 5, the support rod 2 and the connecting rod 45 have the following structure: firstly, the supporting rod 2 is obliquely arranged on the base 1, the connecting rod 45 is horizontally arranged with the supporting rod 2, the connecting rod 45 comprises a first connecting part 451 and a second connecting part 452, and the first connecting part 451 is positioned above the second connecting part 452 and is vertically arranged with the second connecting part 452.

Meanwhile, the first mounting rod 46 is movably disposed on the top of the first connecting portion 451, and the second mounting rod 47 is movably disposed at one end of the second connecting portion 452.

Therefore, in the actual use process, since the headrest 41 can rotate, the angle of the first connecting portion 451 is not so important, and therefore, the first connecting portion 451 and the second connecting portion 452 are vertically arranged to facilitate the processing.

And the support rod 2 is obliquely arranged, and the connecting rod 45 and the support rod 2 are horizontally arranged, so that the connecting rod 45 is obliquely arranged, and the waist pillow 42 can obliquely move back and forth, namely, the height can be adjusted and the front and back distance can be adjusted.

As shown in fig. 6, firstly, a plurality of positioning holes 462 are formed in the side wall of the first mounting rod 46, a limiting hole 453 is formed in the side wall of the first connecting portion 451, and a limiting piece 497 sequentially penetrates through the limiting holes 453 and the positioning holes 462 so as to limit the movement of the first mounting rod 46.

Therefore, in actual use, the first limiting member 497 is moved outwards to enable the first limiting member 497 to leave the first positioning hole 462 so as to move the first mounting rod 46, and then the first limiting member 497 sequentially penetrates through the first limiting hole 453 and the first positioning hole 462 so as to limit the first mounting rod 46 to move. Wherein the first retaining member 497 is moved outward directly or by screwing.

Meanwhile, as shown in fig. 9, the side wall of the second installation rod 47 is first provided with a plurality of second positioning holes 471, the side wall of the second connection portion 452 is provided with a second limit hole 454, and a second limit member 498 sequentially penetrates through the second limit hole 454 and the second positioning hole 471 to limit the movement of the second installation rod 47.

Therefore, in the actual use process, the second limiting member 498 is moved outward, so that the second limiting member 498 leaves the second positioning hole 471 and the second mounting rod 47 is moved. When the second mounting rod 47 moves to the desired position, the second limiting member 498 passes through the second limiting hole 454 and the second positioning hole 471 in sequence, so as to limit the movement of the second mounting rod 47. The second limiting member 498 may be pulled out directly or screwed out by rotation.

As shown in fig. 4, 5 and 9: the waist pillow 42 can rotate, and the rotating structure is as follows: firstly, the waist pillow 42 is rotatably arranged on the second mounting rod 47, the second mounting portion 421 is arranged on one side of the waist pillow 42 close to the second mounting rod 47, one of the second mounting portions 421 is provided with a second mounting hole 422, the other of the second mounting portions 421 is provided with a second mounting groove 423, the top of the second mounting rod 47 is positioned between the two mounting portions 421 and is provided with a second toothed hole 472, a second rotating member 499 penetrates through the second mounting hole 422 and the second toothed hole 472, and one end of the second rotating member 499 is positioned in the second mounting groove 423.

Meanwhile, a plurality of protruding strips two 4991 are arranged on the outer side of the second rotating member 499, and the protruding strips two 4991 are located in the tooth grooves of the second toothed hole 472. Therefore, in the actual use process, the waist pillow 42 is rotated and the second rotating member 499 is driven to rotate, so that the second protruding strip 4991 is driven to rotate from one tooth slot to the other tooth slot of the second toothed hole 472.

And in order to avoid the relative rotation between the waist pillow 42 and the second rotating part 499, one end of the second rotating part 499, which is far away from the third mounting groove, is provided with a second rotation limiting block 4992, the second mounting part 421 provided with a second mounting hole 422 is provided with a second square hole 424 on one side of the second mounting hole 422, and the second rotation limiting block 4992 is positioned in the second square hole 424 so as to limit the relative rotation between the second rotating part 499 and the waist pillow 42.

As shown in fig. 2, the lower portion of the back rest 43 protrudes outward, and the elastic member 40 is provided between the connecting frame 44, and the elastic member 40 is used to restore the back rest 43 moved by the user in the backward direction.

Therefore, in the actual use process, the lower part of the back pillow 43 is protruded outwards, so that the back pillow is matched with the shape of the back of a human body, and a better supporting and leaning effect is achieved.

Meanwhile, the elastic member is arranged between the back pillow 43 and the connecting frame 44, compared with rigid connection, the utility model adopts elastic connection, namely the comfort of the back pillow 43 can be increased by the pressure of the human body on the back pillow 43 and the cooperation of the elastic member 40, and the back pillow 43 moved by the user leaning back can be reset by the elastic member 40.

As shown in fig. 1 to 3, the present invention has the following adjustment structure in addition to the above-described adjustment structure.

Firstly, the connecting frame 44 is movable, and the moving structure is as follows: the connecting frame 44 is movably arranged on the supporting rod 2, a third limiting hole is formed in the side wall of the connecting frame 44, a plurality of third positioning holes 21 are formed in the side wall of the supporting rod 2, and a third limiting piece 5 sequentially penetrates through the third limiting hole and the third positioning hole 21 to limit the connecting frame 44 to move.

Therefore, in the actual use process, the limiting member three 5 is moved outwards to make the limiting member three 5 leave the positioning hole three 21 and further move the connecting frame 44, and when the connecting frame is moved to a desired position, the limiting member three 5 sequentially passes through the limiting hole three and the positioning hole three 21 to limit the connecting frame 44 to move. Wherein the limiting member three 5 can be directly pulled out or screwed out by rotating.

Secondly, the seat cushion 3 can move, and the moving structure is as follows: the support rod 2 is provided with a mounting frame 6, the bottom of the seat cushion 3 is provided with a seat cushion frame 31 connected with the mounting frame 6, and the seat cushion frame 31 is movably arranged on the mounting frame 6.

The concrete structure is as follows: firstly, the seat cushion frame 31 is provided with a groove 32, the sleeve member 8 is arranged in the groove 32, the mounting frame 6 is provided with a connecting member 61, the connecting member 61 is positioned in the sleeve member 8 and moves in the sleeve member 8, meanwhile, the limiting member five 10 penetrates through the sleeve member 8 and the connecting member 61 to limit, and the limiting member five 10 can move by moving outwards. The principle is basically similar to the structure in which the link frame 44 moves.

Meanwhile, the mounting frame 6 is movably arranged on the supporting rod 2, the side wall of the mounting frame 6 is provided with a fourth limiting hole, the side wall of the supporting rod 2 is provided with a fourth positioning hole 22, and the fourth limiting part 7 sequentially penetrates through the fourth limiting hole and the fourth positioning hole 22 to limit the mounting frame 6 to move.

Therefore, in the actual use process, the limiting member four 7 is moved outwards to make the limiting member four 7 leave the positioning hole four 22 and further move the mounting block 6, and when the mounting block is moved to a desired position, the limiting member four 7 sequentially penetrates through the limiting hole four and the positioning hole four 22 to limit the movement of the mounting block 6. Wherein the stop member four 7 can be directly pulled out or screwed out by rotation.

Example two: the present embodiment is substantially the same as the first embodiment, and the differences thereof are: in the rotating structure between the headrest 41 and the mounting rod three 48, as shown in fig. 7 and 8, first, two mounting portions one 411 are disposed on one side of the headrest 41 close to the mounting rod three 48, wherein one mounting portion one 411 is provided with a mounting hole one 412, and the other mounting portion one 411 is provided with a gear 494. And the top of the mounting rod three 48 is located between the two mounting parts one 411 and is opened with a mounting hole four 482, and a pressing piece 493 passes through the mounting hole one 412 and the mounting hole four 482 and is connected with the gear 494.

Meanwhile, the third mounting rod 48 is provided with a toothed hole four 483 at one side of the fourth mounting hole 482, and the gear 494 is located in the toothed hole four 483 so as to limit the rotation of the headrest 41. Thus, in actual use, the headrest 41 can be rotated by pressing the pressing piece 493 to push the gear 494 away from the toothed hole 483.

The structure in which the pressing piece 493 passes through the first mounting hole 412 and the fourth mounting hole 482 and is connected to the gear 494 is: first, a rod 4931 is provided at one side of the pressing member 493, and the rod 4931 passes through the first mounting hole 412 and the fourth mounting hole 482 and is located in a hole in the middle of the gear 494, thereby achieving the synchronous movement of the gear 494 and the pressing member 493.

Meanwhile, the resetting structure of the pressing piece 493 is as follows: first, a spring 496 is disposed between the pressing member 493 and the mounting rod three 48, when the pressing member 493 is pressed, the spring 496 is in a compressed state, and when the pressing member 493 is no longer pressed, the pressing member 493 is moved by the spring 496, so that the gear 494 returns to the tooth-shaped hole four 483, thereby restricting the rotation of the headrest 41.

And the related structure of the gear 494, at first there is an assembly part 4841 on one side of the gear 494, and the assembly part 4841 has a slot, and there is a mounting hole 412 in the mounting part 411 that is provided with the gear 494, and there is a boss that matches with the slot in the mounting hole 412, through the adaptation of boss and slot, thus realize the movement and installation of the gear 494.

And the rotating structure between the first mounting rod 46 and the third mounting rod 48 and the rotating structure of the waist pillow 42 can also adopt the structure of the second embodiment.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. While the present invention is not limited to the above-described embodiments, various changes and modifications may be made without departing from the spirit and scope of the utility model, and these changes and modifications are intended to be included within the scope of the utility model as claimed.

Claims (10)

1. The utility model provides a four backs of bodies support waist study chair which characterized in that includes:

the seat cushion comprises a base (1), wherein a supporting rod (2) is arranged on the base (1), a seat cushion (3) and a backrest component (4) are arranged on the supporting rod (2), the backrest component (4) is positioned above the seat cushion (3), and a space for a user to lean against is formed between the backrest component (4) and the seat cushion (3);

back subassembly (4), its link (44) that includes headrest (41), waist pillow (42) and two back of the body pillows (43) and be connected with bracing piece (2), and two back of the body pillows (43) set up in link (44) one side, hollow connecting rod (45) are worn to be equipped with in link (44), and both ends are provided with respectively about connecting rod (45) and can reciprocate installation pole one (46) and installation pole two (47) of back-and-forth movement to headrest (41) rotate to set up on installation pole one (46), and waist pillow (42) are connected with installation pole two (47).

2. The four-back waist-supporting learning chair according to claim 1, wherein: a third mounting rod (48) is arranged between the headrest (41) and the first mounting rod (46), the headrest (41) is rotatably arranged on the third mounting rod (48), and the third mounting rod (48) is rotatably arranged on the first mounting rod (46).

3. The four-back waist-supporting learning chair according to claim 2, wherein: the headrest (41) is provided with two mounting parts I (411) on one side close to a mounting rod I (48), one mounting part I (411) is provided with a mounting hole I (412), the other mounting part I (411) is provided with a mounting groove I (413), the top of the mounting rod I (48) is positioned between the two mounting parts I (411) and is provided with a toothed hole III (481), a rotating part I (491) penetrates through the mounting hole I (412) and the toothed hole III (481), and two ends of the rotating part I (491) are respectively positioned in the mounting hole I (412) and the mounting groove I (413);

a plurality of first protruding strips (4911) are arranged on the outer side of the first rotating part (491), the first protruding strips (4911) are located in tooth grooves of the tooth-shaped hole three (481), and the first protruding strips (4911) are driven to rotate from one tooth groove of the tooth-shaped hole three (481) to the other tooth groove of the tooth-shaped hole three (481) by rotating the headrest (41) and driving the first rotating part (491) to rotate so as to rotate the headrest (41);

or one side, close to the mounting rod III (48), of the headrest (41) is provided with two mounting parts I (411), one mounting part I (411) is provided with a mounting hole I (412), the other mounting part I (411) is provided with a gear (494), the top of the mounting rod III (48) is positioned between the two mounting parts I (411) and is provided with a mounting hole IV (482), and a pressing piece (493) penetrates through the mounting hole I (412) and the mounting hole IV (482) and is connected with the gear (494);

the mounting rod III (48) is provided with a tooth-shaped hole IV (483) on one side of the mounting hole IV (482), the gear (494) is positioned in the tooth-shaped hole IV (483) and used for limiting the rotation of the headrest (41), and the gear (494) is pushed to leave the tooth-shaped hole IV (483) by pressing the pressing piece (493), so that the headrest (41) can be rotated.

4. The four-back waist-supporting learning chair according to claim 2, wherein: the bottom of the mounting rod III (48) is symmetrically provided with two mounting parts III (484), one mounting part III (484) is provided with a mounting hole III (485), the other mounting part III (484) is provided with a mounting groove III, the top of the mounting rod I (46) is positioned between the two mounting parts III (484) and is provided with a toothed hole I (461), a rotating part III (495) penetrates through the mounting hole III (485) and the toothed hole I (461), and one end of the rotating part III (495) is positioned in the mounting groove III;

the outer side of the rotating member III (495) is provided with a plurality of protruding strips III (4951), the protruding strips III (4951) are located in the tooth grooves of the tooth holes I (461), and the rotating member III (495) is driven to rotate by rotating the mounting rod III (48), so that the protruding strips III (4951) are driven to rotate from one tooth groove of the tooth holes I (461) to the other tooth groove.

5. The four-back waist-supporting learning chair according to claim 4, wherein: one end, far away from the mounting groove III, of the rotating part III (495) is provided with a rotation limiting block III (4952), a square hole III (486) is formed in one side of the mounting hole III (485) of the mounting part III (484) provided with the mounting hole III (485), and the rotation limiting block III (4952) is located in the square hole III (486) so as to limit the relative rotation between the rotating part III (495) and the mounting rod III (48).

6. The four-back waist-supporting learning chair according to any one of claims 1-5, wherein: the supporting rod (2) is obliquely arranged on the base (1), the connecting rod (45) and the supporting rod (2) are horizontally arranged, the connecting rod (45) comprises a first connecting part (451) and a second connecting part (452), and the first connecting part (451) is positioned above the second connecting part (452) and is vertically arranged with the second connecting part (452);

the first mounting rod (46) is movably arranged at the top of the first connecting part (451), and the second mounting rod (47) is movably arranged at one end of the second connecting part (452).

7. The four-back waist-supporting learning chair according to claim 6, wherein: the side wall of the first mounting rod (46) is provided with a plurality of first positioning holes (462), the side wall of the first connecting part (451) is provided with a first limiting hole (453), a first limiting piece (497) sequentially penetrates through the first limiting hole (453) and the first positioning hole (462) to limit the first mounting rod (46) to move, and the first limiting piece (497) is moved outwards to leave the first positioning holes (462) to move the first mounting rod (46);

or/and the side wall of the second mounting rod (47) is provided with a plurality of second positioning holes (471), the side wall of the second connecting part (452) is provided with a second limiting hole (454), a second limiting part (498) sequentially penetrates through the second limiting hole (454) and the second positioning hole (471) to limit the movement of the second mounting rod (47), and the second limiting part (498) is moved outwards to enable the second limiting part (498) to leave the second positioning hole (471) to move the second mounting rod (47).

8. The four-back waist-supporting learning chair according to any one of claims 1-6, wherein: the waist pillow (42) is rotatably arranged on the second mounting rod (47), two mounting parts II (421) are arranged on one side, close to the second mounting rod (47), of the waist pillow (42), one mounting part II (421) is provided with a mounting hole II (422), the other mounting part II (421) is provided with a mounting groove II (423), the top of the second mounting rod (47) is positioned between the two mounting parts II (421) and is provided with a toothed hole II (472), a rotating part II (499) penetrates through the mounting hole II (422) and the toothed hole II (472), and one end of the rotating part II (499) is positioned in the mounting groove II (423);

a plurality of protruding strips II (4991) are arranged on the outer side of the rotating piece II (499), the protruding strips II (4991) are located in the tooth grooves of the toothed holes II (472), and the waist pillow (42) is rotated to drive the rotating piece II (499) to rotate so as to drive the protruding strips II (4991) to rotate to another tooth groove from one tooth groove of the toothed holes II (472).

9. The four-back waist-supporting learning chair according to claim 8, wherein: one end of the second rotating part (499) far away from the third mounting groove is provided with a second rotating limiting block (4992), a second mounting part (421) provided with a second mounting hole (422) is provided with a second square hole (424) on one side of the second mounting hole (422), and the second rotating limiting block (4992) is positioned in the second square hole (424) so as to limit the relative rotation between the second rotating part (499) and the waist pillow (42).

10. The four-back waist-supporting learning chair according to any one of claims 1-6, wherein: the lower part of the back pillow (43) protrudes outwards, an elastic piece (40) is arranged between the back pillow and the connecting frame (44), and the elastic piece (40) is used for restoring the back pillow (43) moved by a user backwards.

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