CN215076416U

CN215076416U - Desk and chair for middle and primary school classroom

Info

Publication number: CN215076416U
Application number: CN202120541085.XU
Authority: CN
Inventors: 陈书鸿; 李勇; 刘浪; 李妍
Original assignee: Central South University of Forestry and Technology
Current assignee: Central South University of Forestry and Technology
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-12-10
Anticipated expiration: 2031-03-16

Abstract

Compared with the prior art, the desk and chair for the classrooms of the middle and primary schools comprises an arm chair and a desk, wherein the arm chair comprises a chair seat plate, a seat plate supporting frame arranged below the chair seat plate and a backrest supporting column connected with the seat plate supporting frame; the desk comprises a desk plate and desk leg supports arranged below the desk plate; the arm-chair also includes: the handrail mechanism is arranged on the seat board supporting frame; one end of the armrest mechanism is in fixed-axis rotation with the seat board support frame, and the other end is movably connected with the backrest pillar; a backrest rotating shaft arranged on the backrest support; a soft backrest which is arranged on the backrest rotating shaft and rotates around the backrest rotating shaft to contract or extend; one end of the soft backrest is connected with the movable connecting end of the armrest mechanism, and the other end of the soft backrest is connected with the backrest rotating shaft; the soft backrest has a first state of rotating and contracting around the backrest rotating shaft and a second state of stretching and stretching around the backrest rotating shaft. The utility model relates to a technical scheme compares in prior art, and it can satisfy student's noon break's needs, improves student's noon break quality, is of value to the student healthy.

Description

Desk and chair for middle and primary school classroom

Technical Field

The application relates to the technical field of teaching equipment, in particular to a desk and chair for a classroom of primary and secondary schools.

Background

The afternoon nap can enable the brain working at noon to have a rest, can supplement the consumption of people in the aspects of brain and physical strength, help the body to eliminate fatigue, stabilize the nervous system and recover physical strength. Therefore, afternoon nap is essential for people, especially students who are in a state of increased physical development. Noon nap is essential for primary and secondary school students, but most primary and secondary schools do not have a place and facilities for providing noon break. Students who are closer to home can go home for nap, while students who are far away from home or in small grades can choose to lie on the desk for nap.

At present, the class seat that middle and primary school's school used is fixed mostly, and the function is single, only can satisfy classroom learning demand, can't satisfy the needs of noon break, and most students lie prone and carry out noon break on this type of desk, leads to cervical vertebra lumbocrural pain easily, both can influence the learning quality of student in the afternoon, more can influence the healthy and skeleton development of student.

Therefore, it is a technical problem to be solved by those skilled in the art how to provide a desk and chair for a classroom of primary and secondary schools, which can meet the requirement of a student on noon break, improve the noon break quality of the student, and is beneficial to the healthy development of the student.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a desk and chair for a classroom of primary and secondary schools, which can meet the requirement of a student on noon break, improve the noon break quality of the student and is beneficial to the healthy development of the student.

The technical scheme provided by the application is as follows:

the application provides a desk and chair for a classroom of middle and primary schools, which comprises a chair and a desk, wherein the chair comprises a chair seat plate, a seat plate supporting frame arranged below the chair seat plate and a backrest supporting column connected with the seat plate supporting frame; the desk comprises a desk plate and desk leg supports arranged below the desk plate; the arm-chair further comprises: the armrest mechanism is arranged on the seat board supporting frame; one end of the armrest mechanism is in fixed-axis rotation with the seat board support frame, and the other end of the armrest mechanism is movably connected with the backrest pillar; the backrest rotating shaft is arranged on the backrest support; the soft backrest is arranged on the backrest rotating shaft and rotates around the backrest rotating shaft to contract or stretch; one end of the soft backrest is connected with the movable connecting end of the armrest mechanism, and the other end of the soft backrest is connected with the backrest rotating shaft; the soft backrest has a first state of rotating and contracting around the backrest rotating shaft and a second state of stretching and extending around the backrest rotating shaft.

Further, in a preferred mode of the present invention, the table leg support includes: the first table leg support is arranged below the table plate; one end of the desk plate is connected with the desk plate, and the other end of the desk plate is connected with the second desk leg support supported by the first desk leg.

Furthermore, in a preferred mode of the present invention, the desk further comprises a pedal mechanism disposed on the leg support; the pedal mechanism includes: the pedal rotating shaft is arranged on the first table leg support; the pedal is movably connected with the pedal rotating shaft; and the supporting component is arranged on the second table leg support and used for supporting the pedal.

Further, in a preferred mode of the present invention, the support member includes: a first foot support and a second foot support mounted on the second leg support; first pedal support with second pedal support horizontal installation position is higher than pedal pivot horizontal installation position, first pedal support is located the pedal support top of second.

Further, in a preferred embodiment of the present invention, the desk further includes: and the magnetic rear gear is arranged on the first table leg support and used for limiting the relative position of the pedal.

Further, in a preferred embodiment of the present invention, the desk further includes: one end of the movable layer plate is supported by the first table leg to rotate in a fixed shaft mode, and the other end of the movable layer plate is supported by the second table leg to be movably connected; and the laminated plate support is arranged on the second table leg support and used for limiting the position of the movable laminated plate.

Further, in the preferred mode of the present invention, the edge of the table plate is provided with a storage groove.

Further, in a preferred mode of the present invention, the backrest pillar is provided with a handrail support; the armrest mechanism includes: the handrail rotating shaft is arranged on the seat board supporting frame; the movable handrail is connected with the handrail rotating shaft; one end of the movable handrail rotates around the handrail rotating shaft fixed shaft, and the other end of the movable handrail is movably connected with the handrail support.

Further, in a preferred mode of the present invention, the armchair further comprises: the storage net is arranged below the tablet chair seat plate and connected with the backrest support post and the seat plate support frame.

Further, in a preferred mode of the present invention, the armchair further comprises: and a backrest guardrail arranged between the backrest pillars.

Compared with the prior art, the desk and chair for the classroom of middle and primary schools provided by the utility model comprises an arm-chair and a desk, wherein the arm-chair comprises a chair seat, a seat support frame arranged below the chair seat and a backrest support post connected with the seat support frame; the desk comprises a desk plate and desk leg supports arranged below the desk plate; the arm-chair further comprises: the armrest mechanism is arranged on the seat board supporting frame; one end of the armrest mechanism is in fixed-axis rotation with the seat board support frame, and the other end of the armrest mechanism is movably connected with the backrest pillar; the backrest rotating shaft is arranged on the backrest support; the soft backrest is arranged on the backrest rotating shaft and rotates around the backrest rotating shaft to contract or stretch; one end of the soft backrest is connected with the movable connecting end of the armrest mechanism, and the other end of the soft backrest is connected with the backrest rotating shaft; the soft backrest has a first state of rotating and contracting around the backrest rotating shaft and a second state of stretching and extending around the backrest rotating shaft. Wherein, the requirements of students on class are met by utilizing the arm-chairs and the desks; in the chair, the tablet chair seat plate provides a sitting space for students, and the tablet chair seat plate is supported by the seat plate support frame and the backrest support column; utilize handrail mechanism the back pivot and soft back, soft back can wind back pivot rotatory extension or shrink, when needs satisfy normal class demand, soft back is in first state: one end of the armrest mechanism is connected with the seat board supporting frame, the other end of the armrest mechanism is connected with the backrest support, and the soft backrest part is contracted on the backrest rotating shaft to meet the backrest requirement of students in class normally; when the requirement of noon break needs to be met, the soft backrest is in the second state: utilize soft back one end is connected handrail mechanism swing joint end combines handrail mechanism is dead axle rotary motion around its dead axle rotation end, stretches soft back makes it wind the rotatory extension of back pivot forms the back deck chair to satisfy student's noon break demand. The utility model relates to a technical scheme compares in prior art, and it can satisfy the needs of student's noon break, improves student's noon break quality, is of value to the healthy development of student.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a desk and chair for a classroom of primary and secondary schools provided in an embodiment of the present invention;

fig. 2 is a schematic perspective view of a chair according to an embodiment of the present invention in a first state;

fig. 3 is a schematic perspective view of a chair according to an embodiment of the present invention in a second state;

FIG. 4 is a schematic view of a three-dimensional structure of a desk according to an embodiment of the present invention;

fig. 5 is a schematic view of a three-dimensional structure of a desk according to an embodiment of the present invention when meeting the requirement of a lunch break.

Description of reference numerals:

a chair 1; a desk 2; a tablet seat 3; a seat support frame 4; a back support 5; a table plate 6; a table leg support 7; a first leg support 701; a second leg support 702; an armrest mechanism 8; an armrest shaft 801; a movable armrest 802; a backrest rotation shaft 9; a soft backrest 10; a pedal mechanism 11; a pedal spindle 1101; a foot board 1102; a support member 1103; magnetically attracting the rear rail 12; a movable laminate 13; a pallet 14; a housing groove 15; an armrest support 16; a storage net 17; a back rest fence 18; a first footrest support 19; a second footrest support 20; and a baffle side plate 21.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.

As shown in fig. 1 to 5, a desk and chair for a classroom of primary and secondary schools provided in an embodiment of the present application includes a chair 1 and a desk 2, where the chair 1 includes a chair seat 3, a seat support frame 4 disposed below the chair seat 3, and a backrest support column 5 connected to the seat support frame 4; the desk 2 comprises a desk plate 6 and a desk leg support 7 arranged below the desk plate 6; the chair 1 further comprises: the armrest mechanism 8 is arranged on the seat board support frame 4; one end of the armrest mechanism 8 is in fixed-axis rotation with the seat board support frame 4, and the other end is movably connected with the backrest pillar 5; a backrest rotating shaft 9 provided on the backrest support 5; a soft backrest 10 which is arranged on the backrest rotating shaft 9 and rotates around the backrest rotating shaft 9 to contract or stretch; one end of the soft backrest 10 is connected with the movable connecting end of the armrest mechanism 8, and the other end of the soft backrest is connected with the backrest rotating shaft 9; the soft backrest 10 has a first state of rotating and contracting around the backrest rotation axis 9 and a second state of stretching and expanding around the backrest rotation axis 9.

The utility model provides a desk and chair for classrooms of middle and primary schools, which comprises an arm chair 1 and a desk 2, wherein the arm chair 1 comprises a chair seat plate 3, a seat plate support frame 4 arranged below the chair seat plate 3 and a backrest support post 5 connected with the seat plate support frame 4; the desk 2 comprises a desk plate 6 and a desk leg support 7 arranged below the desk plate 6; the chair 1 further comprises: the armrest mechanism 8 is arranged on the seat board support frame 4; one end of the armrest mechanism 8 is in fixed-axis rotation with the seat board support frame 4, and the other end is movably connected with the backrest pillar 5; a backrest rotating shaft 9 provided on the backrest support 5; a soft backrest 10 which is arranged on the backrest rotating shaft 9 and rotates around the backrest rotating shaft 9 to contract or stretch; one end of the soft backrest 10 is connected with the movable connecting end of the armrest mechanism 8, and the other end of the soft backrest is connected with the backrest rotating shaft 9; the soft backrest 10 has a first state of rotating and contracting around the backrest rotation axis 9 and a second state of stretching and expanding around the backrest rotation axis 9. Wherein, the requirements of students on class are met by utilizing the arm-chair 1 and the desk 2; in the arm-chair 1, the tablet chair seat 3 provides a sitting space for students, and the tablet chair seat 3 is supported by the seat support frame 4 and the backrest support column 5; with the armrest mechanism 8, the backrest rotating shaft 9 and the soft backrest 10, the soft backrest 10 can extend or contract around the backrest rotating shaft 9, and when the needs of meeting the needs of a normal class are met, the soft backrest 10 is in the first state: one end of the armrest mechanism 8 is connected with the seat board supporting frame 4, the other end of the armrest mechanism is connected with the backrest pillar 5, and the soft backrest 10 is partially contracted on the backrest rotating shaft 9 so as to meet the backrest requirement of students in normal class; when the noon break demand needs to be met, the soft backrest 10 is in the second state: utilize soft back 10 one end is connected 8 swing joint ends of handrail mechanism combines handrail mechanism 8 is dead axle rotary motion around its dead axle rotatory end, and is tensile soft back 10 makes it wind back pivot 9 is rotatory to be extended and is formed the back deck chair to satisfy student's noon break demand. The utility model relates to a technical scheme compares in prior art, and it can satisfy the needs of student's noon break, improves student's noon break quality, is of value to the healthy development of student.

Specifically, in the embodiment of the present invention, the table leg support 7 includes: a first leg support 701 disposed below the table 6; one end of the second leg support 702 is connected to the table 6, and the other end of the second leg support is connected to the first leg support 701.

Specifically, in the embodiment of the present invention, the first leg support 701 is L-shaped, and the second leg support 702 is a strip-shaped leg support; the number of the first leg support 701 and the second leg support 702 is two.

Two sets of the first leg support 701 and the second leg support 702 are parallel to each other to support the table top 6.

Specifically, in the embodiment of the present invention, the desk 2 further comprises a pedal mechanism 11 disposed on the leg support 7; the pedal mechanism 11 includes: a pedal rotation shaft 1101 provided on the first leg support 701; a pedal plate 1102 movably connected with the pedal spindle 1101; is disposed on the second leg support 702 to support the supporting member 1103 of the footrest 1102.

Specifically, in the embodiment of the present invention, the supporting member 1103 includes: a first footrest support 19 and a second footrest support 20 mounted on the second leg support 702; the horizontal installation position of the first pedal support 19 and the second pedal support 20 is higher than the horizontal installation position of the pedal rotating shaft 1101, and the first pedal support 19 is arranged above the second pedal support 20.

When the desk 2 needs to meet the requirement of noon break, the pedal 1102 rotates around the pedal shaft 1101 in a fixed axis manner by using the pedal 1102, the pedal shaft 1101 and the supporting member 1103, the supporting member 1103 is used for supporting the pedal 1102 and limiting the position of the pedal 1102, so that the pedal 1102 forms an inclined surface with a certain angle, the thighs lean on the pedal 1102 conveniently, and the noon break quality of the student is improved.

Specifically, in the embodiment of the present invention, the desk 2 further includes: and a magnetic back stop 12 disposed on the first leg support 701 for limiting the relative position of the foot plate 1102.

When the desk 2 needs to meet the requirement of class, the magnetic-attraction back stop 12 is utilized, the magnetic-attraction back stop 12 is magnetically connected with the pedal 1102 to limit the relative position of the pedal 1102, so that the pedal 1102 is vertically arranged relative to the horizontal plane.

Specifically, in the embodiment of the present invention, the desk 2 further includes: the movable layer plate 13 is arranged below the table plate 6, one end of the movable layer plate 13 is in fixed-axis rotation with the first table leg support 701, and the other end of the movable layer plate 13 is movably connected with the second table leg support 702; a layer plate support 14 arranged on the second leg support 702 for limiting the position of the movable layer plate 13.

Specifically, in the embodiment of the present invention, the desk 2 further includes: and the blocking side plates 21 are arranged between the two groups of first desk leg supports 701 and connected with the movable layer plate 13.

When the requirement of class needs to be met, the movable layer plate 13 and the blocking side plate 21 form a containing compartment for placing learning articles; when needing to satisfy the noon break demand, utilize activity plywood 13 and the plywood holds in the palm 14, activity plywood 13 one end with first table leg supports 701 dead axle rotation, the other end with the second table leg supports 702 swing joint, activity plywood 13 rotates around its dead axle rotation end, makes activity plywood 13 forms the inclined plane of certain angle, the plywood holds in the palm 14 and is used for restricting behind the slope activity plywood 13's position provides bigger appearance knee space when having a rest for the student.

Specifically, in the embodiment of the present invention, the edge of the table 6 is provided with a receiving groove 15.

Specifically, in the embodiment of the present invention, the backrest support 5 is provided with an armrest support 16; the armrest mechanism 8 includes: a handrail rotating shaft 801 arranged on the seat board supporting frame 4; a movable armrest 802 connected to the armrest shaft 801; one end of the movable armrest 802 rotates around the armrest rotating shaft 801 in a fixed axis mode, and the other end of the movable armrest 802 is movably connected with the armrest support 16.

Wherein the armrest support 16 comprises a circular recess; when the requirement of class needs to be met, one end of the movable armrest 802 is clamped with the circular groove.

Specifically, in the embodiment of the present invention, the movable armrest 802 includes a first support rod and a second support rod disposed perpendicular to the first support rod; one end of the first supporting rod is movably connected with the armrest support 16, and the other end of the first supporting rod is connected with the second supporting rod; one end of the second supporting rod is connected with the first supporting rod, and the other end of the second supporting rod is rotatably connected with the handrail rotating shaft 801.

Specifically, in the embodiment of the present invention, the seat support frame 4 is provided with an inclined surface in contact with the second support rod.

Specifically, in the embodiment of the present invention, the chair 1 further comprises: and the storage net 17 is arranged below the tablet chair seat plate 3 and connected with the backrest support post 5 and the seat plate support frame 4.

The storage net 17 is used for placing school supplies such as a bag, so as to increase the storage space and strengthen the function of the arm-chair 1 in class learning.

Specifically, in the embodiment of the present invention, the chair 1 further comprises: a backrest fence 18 disposed between the backrest posts 5.

More specifically, at present, the class seats used by schools in middle and primary schools are mostly fixed, the functions are single, the class learning requirements can be met only, the requirement of noon break cannot be met, most students lie prone on the desks 2 for noon break, cervical vertebra, waist and leg pain is caused easily, the learning quality of the students in the afternoon can be influenced, and the body health and the skeleton development of the students can be influenced.

The utility model relates to a desk and chair for classrooms of middle and primary schools, wherein, the requirements of students on class are satisfied by utilizing the arm-chair 1 and the desk 2; in the arm-chair 1, the tablet chair seat 3 provides a sitting space for students, and the tablet chair seat 3 is supported by the seat support frame 4 and the backrest support column 5; with the armrest mechanism 8, the backrest rotating shaft 9 and the soft backrest 10, the soft backrest 10 can extend or contract around the backrest rotating shaft 9, and when the needs of meeting the needs of a normal class are met, the soft backrest 10 is in the first state: one end of the armrest mechanism 8 is connected with the seat board supporting frame 4, the other end of the armrest mechanism is connected with the backrest pillar 5, and the soft backrest 10 is partially contracted on the backrest rotating shaft 9 so as to meet the backrest requirement of students in normal class; when the noon break demand needs to be met, the soft backrest 10 is in the second state: one end of the soft backrest 10 is connected with the movable connecting end of the armrest mechanism 8, and the soft backrest 10 is stretched by combining the armrest mechanism 8 to do fixed-axis rotation motion around the fixed-axis rotation end of the armrest mechanism, so that the soft backrest rotates around the backrest rotation shaft 9 to form the backrest reclining chair.

To sum up, in the desk and chair for the classroom of middle and primary schools according to the embodiment of the present invention, in the arm-chair 1, the seat plate 3 provides a sitting space for students, and the seat plate support frame 4 and the backrest pillar 5 are used to support the seat plate 3; with the armrest mechanism 8, the backrest rotating shaft 9 and the soft backrest 10, the soft backrest 10 can extend or contract around the backrest rotating shaft 9, and when the needs of meeting the needs of a normal class are met, the soft backrest 10 is in the first state: one end of the armrest mechanism 8 is connected with the seat board supporting frame 4, the other end of the armrest mechanism is connected with the backrest pillar 5, and the soft backrest 10 is partially contracted on the backrest rotating shaft 9 so as to meet the backrest requirement of students in normal class; when the noon break demand needs to be met, the soft backrest 10 is in the second state: one end of the soft backrest 10 is connected with the movable connecting end of the armrest mechanism 8, and the soft backrest 10 is stretched by combining the armrest mechanism 8 to do fixed-axis rotation motion around the fixed-axis rotation end thereof so as to rotate around the backrest rotation shaft 9 and extend to form a backrest reclining chair; in the desk 2, when the requirement of noon break needs to be met, the pedal plate 1102 rotates around the pedal shaft 1101 in a fixed axis manner by using the pedal plate 1102, the pedal shaft 1101 and the pedal support, the pedal support is used for supporting the pedal plate 1102 and limiting the position of the pedal plate 1102, so that the pedal plate 1102 forms an inclined plane with a certain angle, the thigh can be conveniently leaned on the pedal plate 1102, the movable layer plate 13 and the layer plate support 14 are used, one end of the movable layer plate 13 rotates with the fixed axis of the first leg support 701, the other end is movably connected with the second leg support 702, the movable layer plate 13 rotates around the fixed axis rotation end, so that the movable layer plate 13 forms an inclined plane with a certain angle, the layer plate support 14 limits the position of the inclined movable layer plate 13, and provides a larger knee holding space for the student in noon break, thereby improving the noon break quality of students. The utility model relates to a technical scheme compares in prior art, and it can satisfy the needs of student's noon break, improves student's noon break quality, is of value to the healthy development of student.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A desk and chair for a classroom of middle and primary schools comprises an arm chair and a desk, wherein the arm chair comprises a chair seat plate, a seat plate supporting frame arranged below the chair seat plate and a backrest supporting column connected with the seat plate supporting frame; the desk comprises a desk plate and desk leg supports arranged below the desk plate; it is characterized in that the arm-chair further comprises:

the armrest mechanism is arranged on the seat board supporting frame;

one end of the armrest mechanism is in fixed-axis rotation with the seat board support frame, and the other end of the armrest mechanism is movably connected with the backrest pillar; the backrest rotating shaft is arranged on the backrest support;

the soft backrest is arranged on the backrest rotating shaft and rotates around the backrest rotating shaft to contract or stretch; one end of the soft backrest is connected with the movable connecting end of the armrest mechanism, and the other end of the soft backrest is connected with the backrest rotating shaft; the soft backrest has a first state of rotating and contracting around the backrest rotating shaft and a second state of stretching and extending around the backrest rotating shaft.

2. The desk and chair for classrooms of primary and secondary schools as claimed in claim 1, wherein said leg support comprises: the first table leg support is arranged below the table plate; one end of the desk plate is connected with the desk plate, and the other end of the desk plate is connected with the second desk leg support supported by the first desk leg.

3. The desk and chair for classrooms of primary and secondary schools as claimed in claim 2, wherein said desk further comprises a pedal mechanism disposed on said leg support; the pedal mechanism includes: the pedal rotating shaft is arranged on the first table leg support; the pedal is movably connected with the pedal rotating shaft; and the supporting component is arranged on the second table leg support and used for supporting the pedal.

4. The desk and chair for a classroom of middle and primary schools according to claim 3, wherein the support member includes: a first foot support and a second foot support mounted on the second leg support; first pedal support with second pedal support horizontal installation position is higher than pedal pivot horizontal installation position, first pedal support is located the pedal support top of second.

5. The desk and chair for a classroom of middle and primary schools according to claim 3, wherein said desk further comprises: and the magnetic rear gear is arranged on the first table leg support and used for limiting the relative position of the pedal.

6. The desk and chair for a classroom of middle and primary schools according to claim 5, wherein said desk further comprises: one end of the movable layer plate is supported by the first table leg to rotate in a fixed shaft mode, and the other end of the movable layer plate is supported by the second table leg to be movably connected; and the laminated plate support is arranged on the second table leg support and used for limiting the position of the movable laminated plate.

7. The desk and chair for classrooms of primary and secondary schools as claimed in claim 1, wherein the edge of the desk board is provided with a receiving groove.

8. The desk and chair for classrooms of primary and secondary schools as claimed in claim 1, wherein an armrest support is provided on the backrest pillar; the armrest mechanism includes: the handrail rotating shaft is arranged on the seat board supporting frame; the movable handrail is connected with the handrail rotating shaft; one end of the movable handrail rotates around the handrail rotating shaft fixed shaft, and the other end of the movable handrail is movably connected with the handrail support.

9. The desk and chair for a classroom of middle and primary schools according to claim 8, wherein said chair further comprises: the storage net is arranged below the tablet chair seat plate and connected with the backrest support post and the seat plate support frame.

10. The desk chair for a classroom of primary and secondary schools as claimed in any one of claims 1 to 9, wherein said chair further comprises: and a backrest guardrail arranged between the backrest pillars.