CN114468559B

CN114468559B - Tablet chair convenient to height-adjusting

Info

Publication number: CN114468559B
Application number: CN202210060029.3A
Authority: CN
Inventors: 刘自良
Original assignee: Jiangmen Gestu Furniture Manufacturing Co ltd
Current assignee: Jiangmen Gestu Furniture Manufacturing Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2023-04-14
Anticipated expiration: 2042-01-19
Also published as: CN114468559A

Abstract

The invention relates to a tablet chair, in particular to a tablet chair with height convenient to adjust. The invention provides a tablet chair which can support the back of a student and is convenient for adjusting the height. A tablet chair facilitating height adjustment comprising: the left side and the right side of the bottom of the supporting plate are symmetrically provided with four first supporting blocks in the front-back direction; the lower parts of the four first supporting blocks are provided with second supporting blocks in a sliding manner; the bottom of the supporting plate is provided with a first guide block; the guide rods are symmetrically arranged on the front and back of the left side and the right side of the first guide block. Rotate the backup plate through the student and drive the pivot and slightly rotate to adjust the backup plate to suitable student's angle, be convenient for student's back leans on the backup plate, make more comfortable that the student sat.

Description

Tablet chair convenient to height-adjusting

Technical Field

The invention relates to a tablet chair, in particular to a tablet chair with height convenient to adjust.

Background

The tablet chair is an indispensable learning appliance for primary and secondary school students, at present, most tablet chairs are single in style and cannot be adjusted according to the heights of students, and if the height of the tablet chair and the heights of the students have incongruous factors, the sitting posture of the students is not correct, and the eyesight or the body posture of the students can be adversely affected over time.

Patent application CN207949405U, published as 20181012, discloses an adjusting base and a desk and chair, wherein the adjusting base comprises supporting legs arranged at two sides and an upper frame body horizontally connected with the supporting legs at the two sides; the supporting leg comprises a lower leg body, an upper leg body and a plug connector, wherein the upper leg body slides in the lower leg body, the upper leg body is horizontally provided with a plurality of upper fixing holes along the vertical direction, the lower leg body is provided with a lower fixing hole, the plug connector is sequentially and horizontally inserted into the upper fixing holes and the lower fixing holes, and the plug connector comprises a blocking edge and a fixing end, wherein one end of the blocking edge is abutted to the outer side of the lower leg body, and the fixing end penetrates out of the upper fixing holes and the lower fixing holes; the upper frame body comprises an upper stay bar arranged in the middle and upper foot sleeves which are respectively and integrally connected to the two ends of the upper stay bar and are sleeved and slid on the upper foot body; vertical fore shaft has been seted up along vertical direction to the stiff end, go up podotheca and be provided with the locked groove of joint on vertical fore shaft to one side of vaulting pole. Although the height of the chair can be adjusted, the chair is suitable for students with different heights to sit, the chair is not provided with the back plate, so that the students sit on the chair for a long time, the backs of the students are not supported, and humpback is easy to occur.

In view of the above problems, a height-adjustable tablet chair is provided, which can support the back of a student.

Disclosure of Invention

In order to overcome the defects that the student sits on a tablet chair for a long time without supporting the back of the student and humpback easily occurs because a backup plate is not arranged in the patent, the invention has the technical problems that: the height-adjustable tablet chair has the advantages that the tablet chair which can support the back of a student and is convenient to adjust is provided.

The invention is technically characterized in that: a tablet chair facilitating height adjustment, comprising:

the left side and the right side of the bottom of the supporting plate are symmetrically provided with four first supporting blocks in the front-back direction;

the lower parts of the four first supporting blocks are provided with second supporting blocks in a sliding manner;

the bottom of the supporting plate is provided with a first guide block;

the left side and the right side of the first guide block are symmetrically provided with guide rods in the front-back direction;

the first clamping rod is arranged between the four guide rods in a sliding manner, the first clamping rod is connected with the first guide block in a sliding manner, and the first clamping rod is connected with the four second support blocks in a sliding manner;

four first return springs are arranged between the first clamping rod and the first guide block and are respectively wound on the guide rods on the same side;

the back rest mechanism is arranged at the rear side of the supporting plate and is used for enabling students sitting on the supporting plate to back up;

the back mechanism is provided with a clamping mechanism for containing the tablet chair with the height convenient to adjust, and the back mechanism is clamped.

As a preferable aspect of the present invention, the backrest mechanism includes:

the rear side of the supporting plate is provided with a connecting plate;

the rotating shaft is rotatably arranged on the connecting plate;

the backup plate is arranged on the rotating shaft.

As a preferable technical solution of the present invention, the locking mechanism includes:

the middle parts of the left side and the right side of the backup plate are respectively provided with a first clamping block;

the left side and the right side of the supporting plate, which are deviated to the rear side, are both provided with a second clamping rod in a sliding manner;

the second return springs are arranged between the two second clamping rods and the supporting plate;

push rods are arranged on the outer sides of the two second clamping rods and are connected with the supporting plate in a sliding mode;

two torsion springs are arranged between the backup plate and the connecting plate and are wound on the rotating shaft.

As a preferable technical solution of the present invention, the present invention further includes a guide mechanism, the guide mechanism including:

ratchet gears are arranged on the left side and the right side of the rotating shaft;

the bottom of the supporting plate is provided with a second guide block which is positioned at the upper part of the first guide block;

a third clamping rod is arranged in the second guide block in a sliding manner and clamps the two ratchet gears;

two return springs are arranged between the third clamping rod and the second guide block.

As a preferred technical solution of the present invention, the present invention further includes a pushing mechanism, the pushing mechanism includes:

the bottoms of the two second clamping rods are respectively provided with a first connecting rod;

the second connecting rod, the third kelly left and right sides all are equipped with the second connecting rod, and two first connecting rods contact with the second connecting rod of homonymy, and two second connecting rods and second guide block sliding connection.

As a preferable technical solution of the present invention, the present invention further includes a detection mechanism, and the detection mechanism includes:

the connecting frames are arranged on the outer sides of the four second supporting blocks;

and the four connecting frames of the liquid level gauge are all provided with the liquid level gauge for measuring the inclination of the second supporting block relative to the horizontal position.

As a preferable technical solution of the present invention, the present invention further includes an adjusting mechanism, the adjusting mechanism including:

the rubber sleeves are arranged at the bottoms of the four second supporting blocks in a sliding manner;

the left side and the right side of the inner walls of the four rubber sleeves are provided with eight third guide blocks;

the left and right sides of the lower parts of the four second supporting blocks are respectively provided with eight second clamping blocks, and the eight second clamping blocks are connected with the third guide block at the same side in a sliding manner;

the bottom all is threaded in the screw rod, four second supporting shoes is equipped with the screw rod, and four screw rods are connected with the rubber sleeve rotary type of homonymy.

As a preferred technical scheme of the invention, the upper part of the backup plate is provided with a groove.

The beneficial effect after adopting above-mentioned technical scheme is: 1. the backrest plate is rotated by the student to drive the rotating shaft to slightly rotate, so that the angle of the backrest plate suitable for the student is adjusted, the back of the student can conveniently lean against the backrest plate, and the student can sit more comfortably;

2. people rotate the backup plate to drive the first clamping block to rotate, the first clamping block rotates to be in contact with the second clamping rod, and the second clamping rod clamps the first clamping block tightly, so that the first clamping block cannot rotate, and meanwhile, the backup plate cannot rotate, so that the backup plate can be folded, and space is saved;

3. in a normal state, the third clamping rod clamps the ratchet gear, so that the ratchet gear and the rotating shaft cannot rotate, the backup plate can be more stable, and the back of a student leans against the backup plate more stably;

4. whether the second supporting block is flat or not can be detected through the liquid level meter, and students can conduct fine adjustment on the second supporting block conveniently.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a partial perspective view of the present invention.

Fig. 4 is a partial cross-sectional view of the present invention.

Fig. 5 is a schematic perspective view of the backrest mechanism of the present invention.

Fig. 6 is a schematic perspective view of the locking mechanism of the present invention.

Fig. 7 is a partial cross-sectional view of the detent mechanism of the present invention.

Fig. 8 is an enlarged view of a portion a of the present invention.

Fig. 9 is a schematic perspective view of the guiding mechanism of the present invention.

Fig. 10 is a partial cross-sectional view of the guide mechanism of the present invention.

Fig. 11 is a schematic perspective view of a first pushing mechanism of the present invention.

Fig. 12 is a schematic perspective view of a second pushing mechanism of the present invention.

Fig. 13 is a schematic perspective view of the detecting mechanism of the present invention.

Fig. 14 is a schematic perspective view of an adjusting mechanism of the present invention.

Fig. 15 is a partial cross-sectional view of an adjustment mechanism of the present invention.

Labeled in the figure as: 1-support plate, 2-first support block, 3-second support block, 4-first guide block, 5-first clamping rod, 6-guide rod, 7-first return spring, 8-backrest mechanism, 80-connecting plate, 81-rotating shaft, 82-backrest plate, 9-clamping mechanism, 90-first clamping block, 91-second clamping rod, 92-second return spring, 93-push rod, 94-torsion spring, 10-guide mechanism, 100-ratchet gear, 101-second guide block, 102-third clamping rod, 103-return spring, 11-pushing mechanism, 110-first connecting rod, 111-second connecting rod, 12-detection mechanism, 120-connecting frame, 121-liquid level meter, 13-adjusting mechanism, 130-rubber sleeve, 131-second clamping block, 132-third guide block, 133-screw rod.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description, but the invention is not limited to the scope of protection and application.

Example 1

The utility model provides a tablet chair convenient to height-adjusting, as shown in fig. 1-8, including backup pad 1, first supporting block 2, the second supporting block 3, first guide block 4, first kelly 5, guide bar 6, first reset spring 7, back mechanism 8 and clamping mechanism 9, backup pad 1 bottom left and right sides is equal the front and back symmetry and is equipped with first supporting block 2, first supporting block 2 quantity is four, 2 lower parts of four first supporting blocks are all slidingly equipped with second supporting block 3, backup pad 1 bottom is equipped with first guide block 4, the equal front and back symmetry in the left and right sides of first guide block 4 is equipped with guide bar 6, slidingly between four guide bar 6 is equipped with first kelly 5, first kelly 5 is connected with first guide block 4 slidingly, be equipped with four first reset spring 7 between first kelly 5 and the first guide block 4, four first reset spring 7 are respectively around connecting on the guide bar 6 of homonymy, first kelly 5 is connected with four second supporting block 3 slidingly, backup pad 1 rear side is equipped with clamping mechanism 8, be used for just can sit on the backup pad 1, be used for student's back mechanism 8, be convenient for the mechanism is taken in the adjustment of chair, be equipped with the screens mechanism 8, it can save the student's to be convenient for the back to adjust the student.

As shown in fig. 1, fig. 2 and fig. 5, the backrest mechanism 8 includes a connecting plate 80, a rotating shaft 81 and a backup plate 82, the rear side of the supporting plate 1 is connected with the connecting plate 80 through a bolt, the rotating shaft 81 is arranged on the connecting plate 80 in a rotating manner, the backup plate 82 is arranged on the rotating shaft 81 and used for the back of a student to lean against and place, and a groove is formed in the upper part of the backup plate 82 and used for the student to lift the backup plate 82 through the groove to drive the chair with the height being adjusted to be convenient to move.

As shown in fig. 1, 2, 6, 7 and 8, the locking mechanism 9 includes a first locking block 90, a second locking rod 91, a second return spring 92, a push rod 93 and a torsion spring 94, the middle of the left and right sides of the backup plate 82 is connected with the first locking block 90 through a bolt, the left and right sides of the backup plate 1, which are inclined to the rear side, are slidably provided with the second locking rod 91, the first locking block 90 rotates to contact with the second locking rod 91, the second return spring 92 is provided between the two second locking rods 91 and the backup plate 1, the push rods 93 are provided on the outer sides of the two second locking rods 91, the two push rods 93 are slidably connected with the backup plate 1, the two torsion springs 94 are provided between the backup plate 82 and the connecting plate 80, and the two torsion springs 94 are wound around the rotating shaft 81.

When a student needs to use the tablet chair convenient for height adjustment, firstly, the student pulls the first clamping rod 5 to move to the left side along the guide rod 6, the first return spring 7 on the left side is stretched, the first return spring 7 on the right side is compressed, the first clamping rod 5 moves to the left side along the second supporting block 3, so that the first clamping rod 5 does not clamp the second supporting block 3, the student pulls the supporting plate 1 to drive the first supporting block 2 to move to the upper side along the second supporting block 3, so that after the supporting plate 1 is adjusted to a proper height, the student does not apply force to the first clamping rod 5 any more, under the reset action of the first return spring 7, the first clamping rod 5 moves to the right side along the guide rod 6 to reset, the first clamping rod 5 moves to the right side to clamp with the second supporting block 3, meanwhile, the supporting plate 1 drives the connecting plate 80 to move to the upper side, the connecting plate 80 drives the rotating shaft 81 to move to the upper side, the rotating shaft 81 drives the backup plate 82 to move upwards, so that a student can sit on the support plate 1, the back of the student leans against the backup plate 82, when the student does not need to use the tablet chair, the student stands up to be out of contact with the support plate 1, then the student repeats the operation of pulling the first clamping rod 5, the first clamping rod 5 does not clamp the second support block 3, the support plate 1 moves downwards to adjust to the original position, then the student repeats the operation of pushing the first clamping rod 5, the first clamping rod 5 clamps the second support block 3, the student pushes the backup plate 82 to drive the rotating shaft 81 to rotate, the torsion spring 94 deforms, the backup plate 82 drives the first clamping block 90 to rotate, the first clamping block 90 rotates to be in contact with the second clamping rod 91, the second clamping rod 91 drives the push rod 93 to move inwards, the second return spring 92 is compressed, and the student continuously pushes the backup plate 82 to drive the first clamping block 90 to rotate, first fixture block 90 rotates to no longer extrude second fixture block 91, under the reset action of second reset spring 92, second fixture block 91 drives push rod 93 and moves to the outside and resets, second fixture block 91 just carries out the chucking to first fixture block 90, make first fixture block 90 can not rotate at will, backup plate 82 also can not rotate at will simultaneously, at this moment backup plate 82 packs up, thereby can save space, when the student need use the chair, student pulling push rod 93 drives second fixture block 91 and moves to the inside, second reset spring 92 is compressed, second fixture block 91 no longer carries out the chucking to first fixture block 90, under torque spring 94's reset action, backup plate 82 drives pivot 81 derotation and resets, backup plate 82 drives first fixture block 90 derotation and resets, then the student just no longer exerts force to push rod 93, under the reset action of second reset spring 92, second fixture block 91 drives push rod 93 and moves and resets, finally realize adjusting the height to the chucking, just go on to the student's height, convenient to use, backup plate 1 is provided with can adjust the backup plate 82 simultaneously, and the back of the angle of student can be convenient to the chair, thereby can save back to the chair back 82.

Example 2

On the basis of embodiment 1, as shown in fig. 2, 9 and 10, the device further includes a guide mechanism 10, the guide mechanism 10 includes a ratchet gear 100, a second guide block 101, a third lock lever 102 and a return spring 103, the ratchet gear 100 is connected to both left and right sides of the rotating shaft 81 through a key, the second guide block 101 is disposed at the bottom of the support plate 1, the second guide block 101 is disposed at the upper portion of the first guide block 4, the third lock lever 102 is slidably disposed in the second guide block 101, the third lock lever 102 locks the two ratchet gears 100, and the two return springs 103 are disposed between the third lock lever 102 and the second guide block 101.

Initially, the third rod 102 clamps the ratchet gear 100, so that the ratchet gear 100 cannot rotate freely, and the rotating shaft 81 cannot rotate freely, at this time, when a student leans against the backup plate 82, the backup plate 82 cannot rotate freely, when the backup plate 82 needs to be adjusted in angle, people push the third rod 102 to move to the rear side along the second guide block 101, the return spring 103 is compressed, the third rod 102 no longer clamps the ratchet gear 100, the student can slightly rotate the backup plate 82, the backup plate 82 drives the rotating shaft 81 to rotate, the rotating shaft 81 drives the ratchet gear 100 to rotate, so that the backup plate 82 is slightly adjusted in angle, after the backup plate 82 is adjusted in angle, the student can no longer apply force to the third rod 102, under the reset action of the return spring 103, the third rod 102 moves forward along the second guide block 101 to reset at will, the third rod 102 stabilizes the ratchet gear 100, so that the ratchet gear 100 cannot rotate freely, the backup plate 82 is stabilized, and finally, the backup plate 82 can rotate to the student can lean against the backup plate 82 more.

As shown in fig. 11 and 12, the device further includes a pushing mechanism 11, the pushing mechanism 11 includes a first connecting rod 110 and a second connecting rod 111, the first connecting rod 110 is disposed at the bottom of each of the two second clamping rods 91, the second connecting rods 111 are disposed at the left and right sides of the third clamping rod 102, the two first connecting rods 110 contact with the second connecting rods 111 at the same side, and the two second connecting rods 111 are slidably connected with the second guide block 101.

When a student pushes the third clamping rod 102 to move towards the rear side, the return spring 103 is compressed, the third clamping rod 102 drives the second connecting rod 111 to move towards the rear side, the second connecting rod 111 extrudes the first connecting rod 110, the first connecting rod 110 moves towards the inner side, the first connecting rod 110 drives the second clamping rod 91 to move towards the inner side, the second return spring 92 is compressed, the second clamping rod 91 is separated from contact with the first clamping block 90, under the reset action of the torsion spring 94, the backup plate 82 drives the rotating shaft 81 to rotate reversely, at this time, the backup plate 82 is opened, the student slightly adjusts the angle of the backup plate 82, after the angle of the backup plate 82 is adjusted, the student does not apply force to the third clamping rod 102 any more, under the reset action of the return spring 103, the third clamping rod 102 moves forwards along the second guide block 101 to reset, the third clamping rod 102 randomly adjusts the ratchet gear 100, so that the ratchet gear 100 cannot rotate, the backup plate 82 is more stable, meanwhile, the third clamping rod 102 drives the second connecting rod 111 moves towards the front side, the second connecting rod 111 contacts with the second connecting rod 110, the backup plate 92, the backup plate 82 is unfolded under the reset action of the reset spring, and the reset spring 82, so that the backup plate 82 can be unfolded, and the backup plate 82 can be quickly adjusted.

As shown in fig. 1, 2 and 13, the detecting device 12 is further included, the detecting device 12 includes a connecting frame 120 and a liquid level meter 121, the connecting frames 120 are respectively disposed on the outer sides of the four second supporting blocks 3, and the liquid level meters 121 are respectively mounted on the four connecting frames 120 and are used for measuring the inclination of the second supporting blocks 3 relative to the horizontal position.

As shown in fig. 1, fig. 2, fig. 14 and fig. 15, the adjusting mechanism 13 further includes an adjusting mechanism 13, the adjusting mechanism 13 includes rubber sleeves 130, second blocks 131, third guide blocks 132 and screws 133, the rubber sleeves 130 are slidably disposed at the bottoms of the four second support blocks 3, the third guide blocks 132 are disposed at the left and right sides of the inner walls of the four rubber sleeves 130, the number of the third guide blocks 132 is eight, the second blocks 131 are disposed at the left and right sides of the lower portions of the four second support blocks 3, the number of the second blocks 131 is eight, the eight second blocks 131 are slidably connected with the third guide blocks 132 on the same side, the screws 133 are threadedly disposed at the bottoms of the four second support blocks 3, and the four screws 133 are rotatably connected with the rubber sleeves 130 on the same side.

Through the numerical value on the liquid level meter 121, observe the numerical position of the liquid plane alignment in the liquid level meter 121, thereby judge the inclination degree of the second supporting block 3, if the inclination degree of the second supporting block 3 is higher, people rotate the screw 133, the screw 133 rotates to move to the lower side to extrude the rubber sleeve 130, the rubber sleeve 130 drives the third guide block 132 to move to the lower side, the third guide block 132 plays a guiding role, finely adjust the rubber sleeve 130, so that the liquid level in the liquid level meter 121 is vertical, at this time, the second supporting block 3 is perpendicular to the plane, the student stops rotating the screw 133, when the student does not need to use the chair, the student reversely rotates the screw 133, the screw 133 reversely rotates to the upper side, the screw 133 pushes the rubber sleeve 130 to move to the upper side, the rubber sleeve 130 drives the third guide block 132 to move to the upper side to reset, so as to detect whether the bottoms of the four second supporting blocks 3 are flat or not, thereby the second supporting blocks 3 can be adjusted, so that the heights of the second supporting blocks 3 are consistent, the students can conveniently sit on the desk more stably.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A tablet chair convenient to height-adjusting, characterized by includes:

the left side and the right side of the bottom of the supporting plate (1) are symmetrically provided with the first supporting blocks (2) in a front-back manner, and the number of the first supporting blocks (2) is four;

the lower parts of the four first supporting blocks (2) are provided with second supporting blocks (3) in a sliding manner;

the bottom of the supporting plate (1) is provided with a first guide block (4);

the left side and the right side of the first guide block (4) are symmetrically provided with guide rods (6) in the front-back direction;

the first clamping rod (5) is arranged between the four guide rods (6) in a sliding manner, the first clamping rod (5) is connected with the first guide block (4) in a sliding manner, and the first clamping rod (5) is connected with the four second support blocks (3) in a sliding manner;

four first return springs (7) are arranged between the first clamping rod (5) and the first guide block (4), and the four first return springs (7) are respectively wound on the guide rods (6) on the same side;

the back rest mechanism (8) is arranged on the rear side of the supporting plate (1) and is used for enabling a student sitting on the supporting plate (1) to rest back;

the clamping mechanism (9) is arranged on the backrest mechanism (8) and used for accommodating the tablet chair with the height convenient to adjust, and the backrest mechanism (8) is clamped;

the backrest mechanism (8) includes:

the rear side of the support plate (1) is provided with a connecting plate (80);

the rotating shaft (81) is rotatably arranged on the connecting plate (80);

the rotating shaft (81) is provided with a backup plate (82);

the detent mechanism (9) comprises:

the middle parts of the left side and the right side of the backup plate (82) are respectively provided with a first clamping block (90);

the left side and the right side of the supporting plate (1) which are deviated to the rear side are both provided with a second clamping rod (91) in a sliding manner;

the second return springs (92) are arranged between the two second clamping rods (91) and the support plate (1);

the push rods (93) are arranged on the outer sides of the two second clamping rods (91), and the two push rods (93) are connected with the supporting plate (1) in a sliding mode;

two torsion springs (94) are arranged between the backup plate (82) and the connecting plate (80), and the two torsion springs (94) are wound on the rotating shaft (81);

still including guiding mechanism (10), guiding mechanism (10) include:

ratchet gears (100) are arranged on the left side and the right side of the rotating shaft (81);

the bottom of the supporting plate (1) is provided with a second guide block (101), and the second guide block (101) is positioned at the upper part of the first guide block (4);

the second guide block (101) is internally provided with a third clamping rod (102) in a sliding manner, and the third clamping rod (102) clamps the two ratchet gears (100);

two return springs (103) are arranged between the third clamping rod (102) and the second guide block (101);

still include pushing mechanism (11), pushing mechanism (11) includes:

the bottoms of the two second clamping rods (91) are respectively provided with a first connecting rod (110);

second connecting rod (111), third kelly (102) left and right sides all is equipped with second connecting rod (111), and two first connecting rod (110) contact with second connecting rod (111) of homonymy, and two second connecting rod (111) and second guide block (101) sliding connection.

2. A tablet chair with easy height adjustment according to claim 1, further comprising a detection mechanism (12), the detection mechanism (12) comprising:

the connecting frames (120) are arranged on the outer sides of the four second supporting blocks (3);

and the four connecting frames (120) are respectively provided with the liquid gradienters (121) which are used for measuring the inclination of the second supporting block (3) relative to the horizontal position.

3. A tablet chair of conveniently adjustable height according to claim 2, further comprising an adjustment mechanism (13), the adjustment mechanism (13) comprising:

the rubber sleeves (130) are arranged at the bottoms of the four second supporting blocks (3) in a sliding manner;

the left side and the right side of the inner walls of the four rubber sleeves (130) are provided with the third guide blocks (132), and the number of the third guide blocks (132) is eight;

the left and right sides of the lower parts of the four second supporting blocks (3) are respectively provided with eight second fixture blocks (131), and the eight second fixture blocks (131) are connected with the third guide block (132) on the same side in a sliding manner;

the screw rods (133) are arranged at the bottoms of the four second supporting blocks (3) in a threaded mode, and the four screw rods (133) are connected with the rubber sleeve (130) on the same side in a rotating mode.

4. A tablet chair with easy height adjustment according to claim 1, wherein the upper part of the back plate (82) is provided with a groove.