CN216220675U - A desk and chair for lunch break - Google Patents

Abstract

The utility model relates to a desk and chair capable of being used for noon break, belonging to the field of desk and chair, comprising a chair, wherein the chair comprises a support, a seat plate and a backrest, the seat plate and the backrest are arranged on the support, the backrest comprises a connecting plate and an adjusting plate which are mutually attached, the adjusting plate is arranged on the front surface of the connecting plate in an up-and-down position-adjustable manner through a sliding adjusting assembly, and the back surface of the connecting plate is arranged on the support in a backward-rotatable manner through a rotating adjusting assembly. The length of the backrest can be increased by arranging the adjusting plate on the opposite connecting plate, so that after the backrest is laid down by rotating the adjusting assembly, the backrest with enough length can well support the head of a student, therefore, the utility model can be used for noon break of primary and secondary school students in classrooms, and meanwhile, the comfort level of noon break of the primary and secondary school students can be improved.

Description

A desk and chair for lunch break

technical field

The utility model relates to the field of desks and chairs, in particular to a desk and chair for lunch break.

Background technique

Napping is essential for teenagers, but due to the limitations of existing conditions, it is impossible for most primary and secondary schools to provide suitable nap facilities for students. Under the current conditions, most primary and secondary school students can only lie in class at noon. Sleeping on the table can get a little low-quality rest, but in the long run, students will suffer from backache and back pain, which will affect their study status in the afternoon.

In order to cope with this situation, there are now many desks and chairs with nap function. By laying the backrest of the seat back, students can lie down on the seat for a morning break. However, due to the limitations of the use scenarios of desks and chairs, firstly, the classroom space is not enough in the use state, and secondly, the backrest of the chair cannot be designed too high, so after the backrest is put down, it is difficult for the backrest to support the student's head, and it is impossible to Completely solve the problem of students' lunch break.

Utility model content

Based on this, it is necessary to provide a desk and chair that can be used for lunch break, including a seat, the seat includes a bracket, a seat plate arranged on the bracket, and a backrest, and the backrest includes connecting plates that are arranged in close contact with each other. and the adjusting plate, and the adjusting plate is arranged on the front of the connecting plate so that the upper and lower positions of the adjusting plate can be adjusted through the sliding adjusting assembly, and the back of the connecting plate is rotatably disposed on the bracket backward through the rotating adjusting assembly.

Preferably, the lower end of the adjusting plate is provided with an insert, the seat plate is provided with a socket corresponding to the insert, and the insert is inserted into the insert.

Preferably, the sliding adjustment assembly includes a set of protruding strips disposed behind the adjusting plate, the set of protruding strips includes a plurality of protruding strips that are arranged from top to bottom and are parallel to each other, and the protruding strips are arranged at equal intervals and are opposite to each other. A limiting groove is formed between two adjacent convex strips, the connecting plate is provided with a receiving groove corresponding to the convex strip group for accommodating the convex strip group, and the upper end of the containing groove is provided with a window passing through the connecting plate , an elastic plate is arranged in the opening, the top of the elastic plate is provided with a limit bar corresponding to the limit slot, the limit bar is embedded in the limit slot, and the back of the connecting plate corresponds to The top end of the elastic plate is rotatably provided with a rotating drum, the circumferential surface of the rotating drum facing one end of the elastic plate is provided with a pressure strip, and the side surface of the pressure strip facing the elastic plate is attached to the elastic plate the back of the plate, and the surface of the rotating drum is also fixedly provided with a gusset plate.

Preferably, the connecting plate is provided with a chute penetrating the connecting plate along the up-down direction, the adjusting plate is provided with a slider corresponding to the chute, and the slider is slidably arranged in the chute , and a side surface of the slider away from the adjusting plate is fixedly provided with a sliding plate, and the sliding plate is slidably attached to the back of the connecting plate.

Preferably, the back of the adjusting plate is provided with first blocking bars corresponding to both sides of the connecting plate, the first blocking bars are arranged in close contact with the edges of the connecting plate, and the first blocking bars are far away from the One end of the adjusting plate is also fixedly provided with a first pressing plate, and the first pressing plate is disposed in contact with the back of the connecting plate.

Preferably, the back of the adjusting plate is provided with a second blocking bar corresponding to the top end of the connecting plate, the second blocking bar is disposed in contact with the edge of the connecting plate, and the second blocking bar is far away from the adjustment One end of the plate is also fixedly provided with a second pressing plate, and the second pressing plate is disposed in contact with the back of the connecting plate.

Preferably, the rotation adjustment assembly includes mounting seats disposed on both sides of the back of the connecting plate, the bracket is provided with a connecting seat corresponding to the mounting seat, and the connecting seat is located on the outer side of the corresponding mounting seat. ; The mounting seat is provided with a slot corresponding to its corresponding connecting seat, the slot is provided with an arc-shaped limiting piece that is concentric with the slot, and the connecting seat is provided with a cylindrical shape corresponding to the slot. A shaped plug, the plug is rotatably inserted into the slot, and the connecting seat and the mounting seat are slidably abutted, and the plug corresponds to the arc-shaped limit piece. An arc-shaped limit slot with the same centerline as the insertion column, the arc-shaped limit piece is inserted in the arc-shaped limit slot, and the central angle of the arc-shaped limit piece is smaller than the arc-shaped limit The central angle of the slot.

Preferably, the top end of the adjusting plate extends beyond the top end of the connecting plate, and the top portion of the adjusting plate extending beyond the connecting plate is provided with a handle hole extending through the adjusting plate.

Preferably, the bracket includes a mounting frame for mounting the seat plate and the backrest and a support frame for supporting the mounting frame, and the mounting frame is movably arranged on the support frame.

Preferably, it also includes a desk used with the seat, the desk includes a support foot and a storage box arranged on the top of the support foot, and a support pad is arranged on the support foot.

Below in conjunction with above-mentioned technical scheme and accompanying drawing, the principle and effect of the present utility model are further described:

1. The length of the backrest of the present utility model can be increased by lifting the adjusting plate relative to the connecting plate, so that after the backrest is brought down by rotating the adjusting assembly, the backrest with sufficient length can play a good supporting role on the student's head. .

2. The utility model can adjust the height of the seat plate, so that it can be used by students of different heights.

Description of drawings

FIG. 1 is a schematic structural diagram 1 of the seat according to the embodiment of the present invention;

FIG. 2 is a second structural schematic diagram of the seat according to the embodiment of the present invention;

FIG. 3 is a schematic view of the right side structure of the seat according to the embodiment of the present invention;

4 is a partial cross-sectional structural schematic diagram of the seat according to the embodiment of the present invention;

5 is a schematic diagram of the matching structure of the connecting seat and the mounting seat according to the embodiment of the present invention;

6 is a schematic structural diagram of the seat back according to the embodiment of the present invention when the backs are rotated backward;

FIG. 7 is a structural schematic diagram of the matching use of the chair and the desk according to the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a desk according to an embodiment of the present invention.

Description of reference numbers:

11-adjustment plate, 110 headrest, 1101-groove, 111-insert, 112-handle hole, 113-first stop, 114-first pressure plate, 115-second stop, 116-second Pressure plate, 117-slide plate, 118-protruding strip, 119-limiting groove, 12-connecting plate, 121-chute, 122-window, 123-elastic plate, 124-limiting strip, 2-seat plate, 31- Rotary drum, 32-pressing strip, 33-plate, 41-mounting seat, 411-slot, 412-arc limiter, 42-connector, 421-post, 422-arc limiter slot, 5- Bracket, 51-mounting frame, 511-insertion rod, 52-support frame, 521-insertion cylinder, 522-fastening screw, 61-storage box, 62-foot, 63-support pad, 64-storage box, 651-installation Rod, 652-Connecting rod, 66-Mounting part, 661-Adjusting bolt.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present utility model will be described in further detail below in conjunction with the accompanying drawings and embodiments:

Wherein, the orientation nouns such as front, back, left, right, up, down, etc. mentioned in the description are all subject to attached drawing 1 .

As shown in Figures 1-7, a desk and chair for lunch break, including a seat, the seat includes a bracket 5, a seat plate 2 arranged on the bracket 5, and a backrest, and the backrest includes a mutual fit The connecting plate 12 and the adjusting plate 11 are set on the front of the connecting plate 12 in an adjustable up and down position by sliding the adjusting assembly, and the back of the connecting plate 12 can be rotated backward by rotating the adjusting assembly. set on the bracket 5 .

In the present invention, the backrest includes a connecting plate 12 and an adjusting plate 11 that are attached to each other. When students need to take a lunch break, they can increase the length of the backrest by lifting the adjusting plate 11 relative to the connecting plate 12. The plate 12 is rotated backward by a certain angle, so that the backrest with increased length can be inclined backward by a certain angle. At this time, the seat can be used for students to take a half-recumbent lunch break, and because the length of the backrest of the present invention can be increased, Therefore, the utility model can support the students' heads well, and can effectively improve the students' lunch break environment and improve the students' lunch break quality.

Wherein, the rotatable angle a of the rotation adjustment assembly is preferably 30°-60°, that is, after the connecting plate 12 is rotated backward by the angle a, it cannot continue to rotate backward, and the position of the backrest can be fixed at this time, without the need to operate another The fixed structure fixes the rotated backrest, which can effectively simplify the operation process of the utility model, and at the same time, limit the rotation range of the rotating assembly within 30°-60°, and can also avoid the utility model from rotating backwards when in use. The backrest collides with the desk behind it, so that the utility model can better adapt to the use environment in the classroom.

In one embodiment, the lower end of the adjusting plate 11 is provided with an insert 111 , the seat plate 2 is provided with a socket corresponding to the insert 111 , and the insert 111 is inserted into the insert.

In this embodiment, when the backrest is not rotated backward, that is, when the seat is in the writing state, the inserts 111 on the adjusting plate 11 are inserted into the sockets. Fix the position of the backrest to prevent the backrest from turning backwards. In addition, when the backrest needs to be rotated backward during the lunch break, that is, when the state of the seat needs to be switched from the writing state to the lunch break state, the seat plate 2 can be released while the length of the backrest can be lengthened by lifting the adjustment plate 11 of the backrest. For the fixing of the backrest, the connecting plate 12 is brought into a rotatable state, that is, the backrest can be tilted backward directly after lifting the adjusting plate 11. Therefore, the utility model has a simple use method and convenient operation process, which can be conveniently used by primary and middle school students.

Wherein, a protrusion can also be provided on the lower end of the insert 111. After the insert 111 is inserted into the socket, the protrusion is located below the socket, which can effectively prevent the insert 111 from coming out of the socket.

In one embodiment, the sliding adjustment assembly includes a set of ridges disposed on the back of the regulating plate 11 . 118 are arranged at equal intervals, and a limiting slot 119 is formed between two adjacent protruding strips 118. The connecting plate 12 is provided with an accommodating slot corresponding to the protruding strip group for accommodating the protruding strip group, and the upper end of the accommodating slot is opened There is a window 122 extending through the connecting plate 12 , an elastic plate 123 is arranged in the window 122 , and a limit bar 124 is provided at the top of the elastic plate 123 corresponding to the limit slot 119 , and the limit bar 124 Embedded in the limiting groove 119 , a rotating drum 31 is rotatably provided on the back of the connecting plate 12 corresponding to the top end of the elastic plate 123 , and the circumferential surface of the rotating drum 31 faces the edge of the elastic plate 123 . One end is provided with a pressure strip 32 , the side surface of the pressure strip 32 facing the elastic plate 123 is attached to the back of the elastic plate 123 , and the surface of the drum 31 is also fixedly provided with a gusset 33 .

In this embodiment, the adjustment plate 11 is attached to the connecting plate 12 , the protruding strips 118 on the back of the adjustment plate 11 are located in the accommodating grooves, the pressure strips 32 on the drum 31 are attached to the elastic plate 123 , and the limiter on the elastic plate 123 The position bar 124 is embedded in the position limit slot 119, therefore, the position bar 124 can fix the position of the adjusting plate 11 relative to the connecting plate 12, so that the adjusting plate 11 and the adjusting plate 11 are fixed to each other, thereby fixing the length of the backrest. In addition, when the length of the backrest needs to be adjusted, it is only necessary to pull the gusset plate 33 and rotate the drum 31, so that the pressure bar 32 on the drum 31 is rotated away from the elastic plate 123, so that the limit bar 124 can be in contact with the adjustment plate 11. At this time, the position of the adjustment plate 11 relative to the connecting plate 12 can be adjusted, and then the length of the backrest can be adjusted, that is, the matching structure of the limit strip 124 and the limit groove 119 in this embodiment makes the length of the back plate longer. The level is adjustable so that it can be used by people of different heights.

In addition, when the pressure strip 32 on the drum 31 is pressed against the elastic plate 123, the buckle plate 33 on the drum 31 is preferably attached to the back of the connection plate 12, that is, the buckle plate 33 is attached to the connection plate 12. When it is on the back of the rotating drum 31, the pressure strip 32 on the rotating drum 31 presses the limit strip 124 on the elastic plate 123 into the limit groove 119. At this time, the limit strip 119 will limit the sliding of the adjusting plate 11 relative to the connecting plate 12. Therefore, When the seat is in the writing state, the gusset plate 33 can be prevented from protruding from the back of the seat, so as to effectively save the space behind the seat, and at the same time, it can also prevent the gusset plate 33 from driving the drum 31 due to accidental touch when the seat is in use. turn.

In one embodiment, the connecting plate 12 is provided with a sliding groove 121 extending through the connecting plate 12 along the up-down direction, and the adjusting plate 11 is provided with a sliding block corresponding to the sliding groove 121 , and the sliding block is slidable The slider 117 is fixedly disposed in the chute 121 , and a side surface of the slider away from the adjusting plate 11 is fixedly provided with a sliding plate 117 .

In this embodiment, the existence of the sliding block and the sliding plate 117 enables the adjusting plate 11 to move only in contact with the connecting plate 12 , which can ensure the stability of the adhering structure of the adjusting plate 11 and the connecting plate 12 .

In one embodiment, first blocking bars 113 are disposed on the back of the adjusting plate 11 corresponding to both sides of the connecting plate 12 , and the first blocking bars 113 are disposed in contact with the edges of the connecting plate 12 , and the One end of the first blocking bar 113 away from the adjusting plate 11 is also fixedly provided with a first pressing plate 114 .

In this embodiment, the first pressing plate 114 is used to make the connecting plate 12 and the adjusting plate 11 adhere to each other, so as to further ensure the stability of the adhering structure of the connecting plate 12 and the adjusting plate 11 .

In one embodiment, the back of the adjusting plate 11 is provided with a second blocking bar 115 corresponding to the top end of the connecting plate 12 , the second blocking bar 115 is disposed to fit the edge of the connecting plate 12 , and the One end of the second blocking bar 115 away from the adjusting plate 11 is also fixedly provided with a second pressing plate 116 , and the second pressing plate 116 is disposed in contact with the back of the connecting plate 12 .

In this embodiment, the second pressing plate 116 is used to make the connecting plate 12 and the adjusting plate 11 adhere to each other, so as to further ensure the stability of the adhering structure of the connecting plate 12 and the adjusting plate 11. In addition, the second blocking bar 115 can It is used to limit the upper and lower positions of the adjusting plate 11 on the connecting plate 12. After the third blocking bar abuts the upper end of the adjusting plate 11, the second blocking bar 115 can prevent the adjusting plate 11 from continuing to move downward relative to the connecting plate 12. , so the third stop bar can assist the sliding adjustment component to locate the upper and lower positions of the adjustment plate 11, and at the same time, the second stop bar 115 can also protect the sliding adjustment component when the student presses the adjustment plate 11, to avoid the sliding adjustment component due to excessive force. and damaged.

In one embodiment, the rotation adjustment assembly includes mounting seats 41 disposed on both sides of the back of the connecting plate 12 , the bracket 5 is provided with a connecting seat 42 corresponding to the mounting seat 41 , and the connecting seat 42 is located on the outer side of its corresponding mounting seat 41; the mounting seat 41 is provided with a slot 411 corresponding to its corresponding connecting seat 42, and an arc-shaped limiter concentric with the slot 411 is arranged in the slot 411. 412, the connecting seat 42 is provided with a cylindrical plug 421 corresponding to the slot 411, the plug 421 is rotatably inserted in the slot 411, and the connecting seat 42 is connected to the The mounting bases 41 are slidably abutted against each other, and corresponding to the arc-shaped limiting piece 412, the inserting post 421 is provided with an arc-shaped limiting slot 422 which is concentric with the inserting post 421, and the arc-shaped limiting piece 412 is inserted Inside the arc shape 422 , and the central angle of the arc-shaped limiting piece is smaller than the central angle of the arc-shaped limiting groove 422 .

In this embodiment, the slots 411 on the two mounting bases 41 on the back of the connecting board 12 are simultaneously inserted into the sockets 421 on the connecting bases 42 on the outer side thereof. Therefore, the connection structure between the mounting bases 41 and the connecting bases 42 can The connecting plate 12 is mounted on the supporting frame 52 so that the connecting plate 12 can rotate relative to the supporting frame 52 . At the same time, due to the existence of the arc-shaped limiting piece 412, the slot 411 can only be rotated relative to the post 421 by a limited angle. When the edges are in contact with each other, the slot 411 cannot continue to rotate relative to the post 421. At this time, the connecting plate 12 cannot continue to rotate, and the position of the backrest is fixed. Therefore, the connection structure of the mounting seat 41 and the connecting seat 42 can realize the connecting plate 12. There is no need to operate another fixing structure to fix the rotated backrest, which can effectively simplify the operation process of the present invention.

In this embodiment, when the connecting plate 12 is not rotated backwards, the arc-shaped limiting piece 412 is in contact with one end edge of the arc-shaped limiting groove 422 . The edges of the other end of the limiting groove 422 abut against each other.

Wherein, the angle difference b between the central angle of the arc-shaped limiting piece 412 and the arc-shaped limiting groove 422 is preferably 30°-60°, that is, the angle at which the connecting plate 12 can be rotated backward is 30°-60°, which can avoid When the utility model is in use, the backrest rotated backward collides with the desk behind it, so that the utility model can better adapt to the use environment in the classroom.

In one embodiment, the top end of the adjusting plate 11 extends out of the top end of the connecting plate 12 , and the top end portion of the adjusting plate 11 extending out of the connecting plate 12 is provided with a lift extending through the adjusting plate 11 . Hand hole 112.

In this embodiment, the handle hole 112 is used to facilitate holding and pulling of the adjusting plate 11 , thereby facilitating adjustment of the position of the adjusting plate 11 relative to the connecting plate 12 , and facilitating the backward tilt of the backrest.

In one embodiment, the top end of the adjustment plate 11 is provided with a plate-shaped headrest portion 110 , and two sides of the headrest portion close to one end of the adjustment plate are recessed inward to form grooves 1101 .

In this embodiment, the grooves 1101 located on both sides of the headrest portion 110 can be used for the encircling fixation of the straps of the headrest, so that a headrest can be conveniently set at the headrest portion 110 of the seat to improve the The comfort of a lunch break. Among them, the headrest portion 110 and the adjusting plate 11 are preferably integrally formed.

Wherein, the handle hole 112 may be opened on the headrest portion 110 .

In one embodiment, the bracket 5 includes a mounting frame 51 for mounting the seat plate 2 and the backrest, and a supporting frame 52 supporting the mounting Support frame 52 .

In this embodiment, the height of the seat plate 2 can be adjusted by adjusting the height of the mounting frame 51 relative to the support frame 52 , so that the seat of the present invention can be better suited for primary and middle school students of different heights.

In one of the embodiments, the support frame 52 is vertically provided with an insertion cylinder 521, the installation frame 51 is provided with an insertion rod 511 inserted into the insertion cylinder 521 corresponding to the insertion cylinder 521, and the insertion cylinder 521 is also provided with a threaded hole. A tightening screw 522 is provided inside.

In this embodiment, the tightening screw 522 is used to fix the upper and lower positions of the insertion rod 511 in the insertion cylinder 521 , and the height of the seat plate 2 can be adjusted by adjusting the upper and lower positions of the insertion rod 511 in the insertion cylinder 521 .

One of the embodiments further includes a desk used with the seat, the desk includes a support leg 62 and a storage box 61 disposed at the top of the support leg 62 , and a support pad 63 is disposed on the support leg 62 .

In this embodiment, the support pads 63 on the legs 62 are used to support the students' legs when the students are half-lying on the seat, thereby effectively improving the comfort of primary and secondary school students when using the utility model for lunch break. Wherein, a storage box 64 may also be provided below the support pad 63 to increase the functionality of the support pad 63 .

In addition, the legs 62 of the desk can adopt the same lifting structure as the bracket 5 of the seat, so that the height of the storage box 61 on the desk can be adjusted, so that the desk can be better used with the seat in the writing state. .

In one embodiment, the rear end of the support pad 63 is rotatably provided with a mounting rod 651, two ends of the mounting rod 651 are vertically provided with a connecting rod 652, and a connecting portion 66 is provided on the leg 62 of the desk corresponding to the connecting rod 652. The connecting rod 651 is inserted into the jack of the connecting portion 66 movably up and down relative to the connecting portion 66, and the connecting portion 66 is provided with a fixed threaded hole communicating with the jack corresponding to the jack, and an adjusting bolt is arranged in the fixed threaded hole 661. Therefore, by adjusting the upper and lower positions of the connecting rod in the socket of the connecting portion, the upper and lower positions of the support pad can be adjusted, so that the support pad can better fit the seat in the lunch break state. In addition, when the support pad 63 is not in use, the support pad 63 can be rotated relative to the connecting rod 652 to stand up, thereby increasing the movable space under the desk.

The above examples only represent several embodiments of the present invention, and the descriptions thereof are more specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (10)

1. The utility model provides a can supply desk chair of noon break, includes the seat, the seat include the support with set up in sit board and back on the support, its characterized in that, the back is including the connecting plate and the regulating plate that laminate the setting each other, just the regulating plate through slide adjusting assembly from top to bottom the position set up adjustably in the front of connecting plate, the back of connecting plate through rotate regulating assembly can set up towards the back rotation in the support.

2. The desk and chair for noon break of claim 1, wherein the lower end of the adjusting plate is provided with an insert, the seat plate is provided with a socket corresponding to the insert, and the insert is inserted into the socket.

3. The desk and chair for noon break according to claim 1 or 2, wherein the sliding adjusting assembly comprises a protrusion set disposed at the back of the adjusting plate, the protrusion set comprises a plurality of protrusions disposed up and down and parallel to each other, the protrusions are disposed at equal intervals, a limiting groove is formed between two adjacent protrusions, the connecting plate is disposed with a receiving groove corresponding to the protrusion set for receiving the protrusion set, the upper end of the receiving groove is disposed with a window penetrating the connecting plate, an elastic plate is disposed in the window, the top end of the elastic plate is disposed with a limiting bar corresponding to the limiting groove, the limiting bar is embedded in the limiting groove, the back of the connecting plate is rotatably disposed with a rotary drum corresponding to the top end of the elastic plate, and a pressing bar is disposed at one end of the circumferential surface of the rotary drum facing the elastic plate, the side face of one side of the pressing strip, which faces the elastic plate, is attached to the back face of the elastic plate, and a buckle plate is fixedly arranged on the surface of the rotary drum.

4. The desk and chair for noon break according to claim 2, wherein the connecting plate has a sliding slot extending through the connecting plate in the vertical direction, the adjusting plate has a sliding block corresponding to the sliding slot, the sliding block is slidably disposed in the sliding slot, and a side surface of the sliding block away from the adjusting plate is fixedly provided with a sliding plate, and the sliding plate is slidably attached to the back surface of the connecting plate.

5. The desk and chair for noon break according to claim 4, wherein the back of the adjusting plate is provided with first blocking strips corresponding to two sides of the connecting plate, the first blocking strips are attached to the edge of the connecting plate, a first pressing plate is fixedly arranged at one end of each first blocking strip, which is far away from the adjusting plate, and the first pressing plate is attached to the back of the connecting plate.

6. The desk and chair for noon break according to claim 5, wherein the back of the adjusting plate is provided with a second blocking strip corresponding to the top end of the connecting plate, the second blocking strip is attached to the edge of the connecting plate, a second pressing plate is fixedly arranged at one end of the second blocking strip away from the adjusting plate, and the second pressing plate is attached to the back of the connecting plate.

7. The desk and chair for noon break according to claim 1, wherein the rotation adjusting assembly comprises mounting seats arranged on both sides of the back surface of the connecting plate, the support is provided with connecting seats corresponding to the mounting seats, and the connecting seats are positioned on the outer sides of the corresponding mounting seats; the mounting seat is provided with a slot corresponding to the connecting seat corresponding to the mounting seat, an arc-shaped limiting piece which is the same as the slot in center line is arranged in the slot, the connecting seat is provided with a cylindrical inserting column corresponding to the slot, the inserting column is rotatably inserted in the slot, the connecting seat is slidably abutted against the mounting seat, the inserting column corresponds to the arc-shaped limiting piece and is provided with an arc-shaped limiting groove which is the same as the inserting column in center line, the arc-shaped limiting piece is inserted in the arc-shaped limiting groove, and the central angle of the arc-shaped limiting piece is smaller than that of the arc-shaped limiting groove.

8. The desk and chair for noon break of claim 1, wherein the top end of the adjusting plate extends out of the top end of the connecting plate, and the top end part of the adjusting plate extending out of the connecting plate is provided with a handle hole penetrating through the adjusting plate.

9. The desk and chair for noon break of claim 1, wherein the stand comprises a mounting frame for mounting the seat and the backrest and a support frame for supporting the mounting frame, and the mounting frame is liftable and lowerable on the support frame.

10. The desk and chair for noon break of claim 1, further comprising a desk used with the chair, wherein the desk comprises legs and a storage box disposed on top of the legs, and the legs are provided with support pads.

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