CN216166285U - Desk and chair for students - Google Patents

Abstract

The utility model discloses a desk and chair for students, which comprises a desk and a chair, wherein the desk and the chair can be adjusted to proper positions through a height adjusting mechanism to adapt to students with different heights, and meanwhile, when the desk and the chair are at the same horizontal height or the desk is lowered to the proper height and a desktop is lifted to the proper angle and is as high as the chair, the desk and the chair are connected through a lock head and a lock catch, and meanwhile, a backrest of the chair is inclined backwards to the proper angle, so that the lying and the rest can be realized, the desktop of the desk can be tilted through a hydraulic support rod, and the backrest of the chair is provided with a headrest, so that the whole device is more in line with ergonomics and is more comfortable when lying.

Description

Desk and chair for students

Technical Field

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

Background

Desk chair is the desk chair that the student used in class, is a kind of desk chair, also called student desk chair, school desk chair, and desk chair can be divided according to age, material, function, divides according to the age section: school desk and chair for children, school student desk and chair for middle school students, and school student desk and chair for college students; according to the function, the method comprises the following steps: fixed desk and chair and lifting desk and chair; the materials are divided into: it is divided into wooden desk and chair, plastic desk and chair and steel-wood desk and chair.

Because the heights of all students are different, the existing study desk and chair are of a fixed structure, when a student uses a desk which is too high for a long time, the student can cause myopia and cause fatigue and discomfort of neck and shoulders for a long time, when the student uses a desk which is too low for a long time, the student can cause scoliosis and can also influence chest development and cardio-pulmonary function, in addition, the phenomenon that the high student is forced to limit the height of the desk and has to stretch by legs is rare, and the health and development of children are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a desk and chair for students, which has the advantage of convenient adjustment and solves the problems that the existing desk and chair for learning are of fixed structures, the students can cause myopia after using an overhigh desk for a long time, the neck and shoulder can be tired and uncomfortable after using the desk for a long time, the spine can be bent laterally and the thoracic cavity development and the cardio-pulmonary function can be influenced after using a short desk for a long time, and in addition, the phenomenon that the tall students are forced to extend aside the legs due to the 'height limitation' of the desk is rare and the health and development of the children are influenced.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a student uses table chair, includes desk, chair, the desk includes the table body and first height adjustment mechanism, the table body and first height adjustment mechanism fixed connection, the chair includes backup pad and second height adjustment mechanism, backup pad and second height adjustment mechanism fixed connection, desk and chair swing joint, first height adjustment mechanism includes two first bases, and the distribution of two first base symmetries is in the below of the table body, the first lift block of top fixedly connected with of first base, the inner chamber swing joint of first lift block has first lifter, the outside to first lift block is run through at the top of first lifter to fixed connection is in the bottom of the table body, a plurality of first thread grooves have been seted up to one side of first lifter, one side swing joint of first lift block has first bolt, the one end of first bolt near first lift block extend to the inner chamber of first thread groove and with the inner chamber screw of first thread groove The lines are connected, a first supporting column is fixedly connected between two first lifting blocks fixed on the two first bases, a first hand-operated screw rod is fixedly connected to the top of the first supporting column, and the top of the first hand-operated screw rod is fixedly connected with the bottom of the table body.

Preferably, the two second height adjusting mechanisms comprise two second bases which are symmetrically distributed below the supporting plate, a second lifting block is fixedly connected to the top of the second bases, a second lifting rod is movably connected to the inner cavity of the second lifting block, the top of the second lifting rod penetrates through the outer part of the second lifting block and is fixedly connected to the bottom of the supporting plate, a cushion is fixedly connected to the top of the supporting plate, a plurality of second threaded grooves are formed in one side of the second lifting rod, a second bolt is movably connected to one side of the second lifting block, one end, close to the second lifting block, of the second bolt penetrates through the inner cavity of the second lifting block and is in threaded connection with the inner cavity of the second threaded grooves, a second supporting column is fixedly connected to one opposite side of the two second bases, and a second hand screw rod is fixedly connected to the top of the second supporting column, the top of the second hand-operated screw rod is fixedly connected with the bottom of the supporting plate.

Preferably, the upper part of the supporting plate close to one side of the table body is provided with a groove, a lock catch is fixedly mounted in the groove, and the lock catch is of a hinge structure.

Preferably, the table body comprises a table top and a cabinet body, the table top and the cabinet body are connected through hinges at one side close to the chair, a groove is formed in the edge of the lower side of the table top at one side close to the chair, the groove is provided with a lock head, an inner ratchet wheel, an outer ratchet wheel, a sliding block and an elastic device, the lock head comprises a fixed page, a rotating shaft and a movable page, the fixed page is fixed in the groove, the movable page corresponds to the lock catch, the movable page and the fixed page are rotatably connected with the fixed page through the rotating shaft, the rotating shaft is fixedly connected with one side of an outer wheel of the inner ratchet wheel and the outer wheel of the inner ratchet wheel, the shaft center of the rotating shaft is aligned with the center of the inner ratchet wheel and the outer ratchet wheel, an inner wheel of the inner ratchet wheel and the outer ratchet wheel is fixed in the groove through a T-shaped support, a pawl is movably connected with the inner wheel of the inner ratchet wheel and the outer ratchet wheel, the other side of the inner ratchet wheel and the inner ratchet wheel are provided with the sliding block, one side close to the inner ratchet wheel and the groove are provided with a bulge, the other side of the elastic device which is fixed in the groove, one side of the cabinet body far away from the chair is fixedly connected with a hydraulic support rod, and the output end of the hydraulic support rod is in contact with the bottom of the desktop.

Preferably, the fixed horizontal adjustment mechanism that is provided with in rear side of backup pad, horizontal adjustment mechanism includes the fixed column, the quantity of fixed column is two, and swing joint has the rotary rod between two fixed columns, the surface cover of rotary rod is equipped with rotatory piece, the top fixedly connected with back board of rotatory piece.

Preferably, the one end that rotatory piece was kept away from to the rotary rod runs through to the outside of fixed column, fixed column one side symmetry be equipped with a plurality of spacing holes, the surface that the rotary rod is located the outside one end of fixed column has seted up the spacing groove, the inner chamber of spacing groove is provided with the connecting rod, the both ends of connecting rod all extend to the inner chamber in the spacing hole of symmetry, the front side fixedly connected with handle of connecting rod.

Preferably, the equal fixedly connected with handrail frame in both sides of cushion, the top of handrail frame is provided with the rotation axis, the surface cover of rotation axis is equipped with the bar, one side fixedly connected with stopper of bar, and the stopper is located the bottom of bar.

Preferably, the equal fixedly connected with spliced pole in both sides of back board, the inner chamber sliding connection of spliced pole has the displacement pole, the top fixedly connected with headrest of displacement pole, the fixed orifices has all been seted up with one side of displacement pole to the spliced pole, the inner chamber swing joint of fixed orifices has the fixed strip.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model completes the support of the desk body by arranging the first base, the first lifting block and the first lifting rod, is convenient for a user to adjust the heights of the first lifting block and the first lifting rod by matching with the first hand rocking screw rod by arranging the first threaded groove and the first bolt, and completes the adjustment and the fixation of the height of the desk body by arranging the first support column to support the first hand rocking screw rod, the same principle is adopted, the chair is also a lifting mechanism, is convenient for students with different heights, solves the problems that the existing study desk and chair are all of a fixed structure because the heights of each student are different, the students can possibly cause myopia and fatigue and discomfort of neck and shoulder after using the desk for a long time, the side bending of the spine can be possibly caused by using the desk with a short length for a long time, the chest development and the cardiopulmonary function can be influenced, and in addition, the phenomenon that tall students compel to limit the height of the desk and have to extend the legs is not rare, and the health and the development of children are influenced.

2. The desk and the chair are of a combined structure, the backrest of the chair is adjustable, the student can lie flat and have a rest conveniently in noon break, the desktop can be inclined, the desk is more in line with human engineering, and the comfort is improved.

3. The desk and the chair adopt a tapered end and a lock catch structure, so that the hands of students are prevented from being clamped when the desk and the chair are combined.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic perspective view of a support plate according to the present invention;

FIG. 3 is a schematic perspective view of a rotary block according to the present invention;

FIG. 4 is a schematic perspective view of a second hand screw of the present invention;

FIG. 5 is a bottom view of the table top of the present invention;

FIG. 6 is a view showing the structure of the inner and outer ratchets of the present invention.

In the figure: 101. a first base; 102. a first lifting block; 103. a first lifting rod; 104. a table body; 105. a first thread groove; 106. a first bolt; 107. a first support column; 108. a first hand lead screw; 109. a second base; 110. a second lifting block; 111. a second lifting rod; 112. a support plate; 113. a cushion; 114. a second thread groove; 115. a second bolt; 116. a second support column; 117. a second hand lead screw; 118. locking; 119. a desktop; 120. a cabinet body; 121. a fixed page; 122. a rotating shaft; 123. a live page; 124. an inner ratchet wheel and an outer ratchet wheel; 125. a slider; 126. an elastic device; 201. fixing a column; 202. rotating the rod; 203. rotating the block; 204. a back board; 205. a limiting hole; 207. a limiting groove; 208. a connecting rod; 209. a handle; 210. connecting columns; 211. a displacement rod; 212. a headrest; 213. a fixing hole; 214. a fixing strip; 215. a handrail frame; 216. a rotating shaft; 217. a grab rail; 218. and a limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.

Referring to fig. 1-6, a student desk comprises a desk and a chair, the desk comprises a desk body 104 and a first height adjusting mechanism, the desk body 104 is fixedly connected with the first height adjusting mechanism, the chair comprises a support plate 112 and a second height adjusting mechanism, the support plate 112 is fixedly connected with the second height adjusting mechanism, the desk is movably connected with the chair, the first height adjusting mechanism comprises two first bases 101, the two first bases 101 are symmetrically distributed below the desk body 104, the top of the first base 101 is fixedly connected with a first lifting block 102, the inner cavity of the first lifting block 102 is movably connected with a first lifting rod 103, the top of the first lifting rod 103 penetrates through the outside of the first lifting block 102 and is fixedly connected to the bottom of the desk body 104, one side of the first lifting rod 103 is provided with a plurality of first thread grooves 105, one side of the first lifting block 102 is movably connected with a first bolt 106, one end of the first bolt 106 close to the first lifting block 102 extends to an inner cavity of the first threaded groove 105 and is in threaded connection with the inner cavity of the first threaded groove 105, a first support column 107 is fixedly connected between the two first lifting blocks 102 fixed on the two first bases 101, a first hand screw 108 is fixedly connected to the top of the first support column 107, the top of the first hand screw 108 is fixedly connected to the bottom of the desk body 104, and the first hand screw 108 is supported by the first support column 107, so that the height of the desk body 104 is adjusted and fixed, and the desk is convenient for students with different heights, and solves the problems that the existing desk and chair are of a fixed structure, the students use too high desk for a long time, the short desk can cause myopia, fatigue and discomfort of neck and shoulder for a long time, and the short desk can cause lateral bending of the spine for a long time due to different heights of the students, in addition, the phenomenon that tall students are forced to extend the legs by limiting the height of the desk is rare, and the health and the development of children are affected.

Specifically, the two second height adjusting mechanisms include two second bases 109, the two second bases 109 are symmetrically distributed below a support plate 112, a second lifting block 110 is fixedly connected to the top of the second base 109, a second lifting rod 111 is movably connected to an inner cavity of the second lifting block 110, the top of the second lifting rod 111 penetrates through the outside of the second lifting block 110 and is fixedly connected to the bottom of the support plate 112, a cushion 113 is fixedly connected to the top of the support plate 112, a plurality of second thread grooves 114 are formed in one side of the second lifting rod 111, a second bolt 115 is movably connected to one side of the second lifting block 110, one end of the second bolt 115, which is close to the second lifting block 110, penetrates through the inner cavity of the second lifting block 110 and is in threaded connection with the inner cavity of the second thread grooves 114, a second support column 116 is fixedly connected to one opposite side of the two second bases 109, a second hand rocking screw 117 is fixedly connected to the top of the second support column 116, the top of the second hand rocking wire rod 117 and the bottom fixed connection of the support plate 112 are through setting up the second base 109, the second support column 116, the second lifting block 110 and the second lifting rod 111, thereby the support to the support plate 112 is accomplished, simultaneously through setting up the second bolt 115 and the second thread groove 114, thereby convenient to use person cooperates the second hand rocking wire rod 117 to adjust the height of the support plate 112, then adjusts the height of the cushion 113.

Specifically, a groove is formed in the upper portion of the support plate 112, which is close to one side of the table body 104, a lock catch 118 is fixedly installed in the groove, and the lock catch 118 is of a hinge structure.

Specifically, the table body 104 includes a table top 119 and a cabinet body 120, the table top 119 and the cabinet body 120 are connected with each other through a hinge at a side close to the chair, a groove is formed in a lower side edge of the table top 119 close to the chair side, the groove is provided with a lock head, an inner and outer ratchet wheel 124, a slider 125 and an elastic device 126, the lock head includes a fixed leaf 121, a rotating shaft 122 and a movable leaf 123, the fixed leaf 121 is fixed inside the groove, the movable leaf 123 corresponds to the latch 118, the movable leaf 123 and the fixed leaf 121 are rotatably connected with the fixed leaf 121 through the rotating shaft 122, the rotating shaft 122 is fixedly connected with one side of an outer wheel of the inner and outer ratchet wheel 124, an axis of the rotating shaft 122 is aligned with a center of the inner and outer ratchet wheel 124, an inner wheel of the inner and outer ratchet wheel 124 is fixed inside the groove through a T-shaped bracket, the inner wheel of the inner and outer ratchet wheel 124 is movably connected with a buckle, the slider 125 is arranged at the other side of the inner and outer ratchet wheel 124, a protrusion is arranged at one side of the slider 125 close to the inner and outer ratchet wheel 124, and the protrusion is contacted with the pawl, the other side of the sliding block 125 is fixedly connected with an elastic device 126, the elastic device 126 is fixed inside the groove, one side of the cabinet 120 away from the chair is fixedly connected with a hydraulic support rod, and the movable end of the hydraulic support rod is in contact with the bottom of the tabletop 119.

In some examples, the table top is lifted to a proper position by a hydraulic support rod, then the sliding block 125 is pressed and the outer wheel of the inner and outer ratchet wheels 124 is rotated, the outer wheel drives the movable leaf 123 to rotate through the rotating shaft 122, when the movable leaf 123 is in a horizontal position, the sliding block 125 is loosened, the sliding block 125 rebounds under the action of the elastic device 126, the protruding part of the sliding block 125 abuts against the pawl of the inner and outer ratchet wheels 124, the pawl clamps the outer wheel of the inner and outer ratchet wheels 124, and then the movable leaf 123 is fixed in the horizontal position, and at this time, only the chair needs to be pushed, and the movable leaf 123 is inserted into the lock catch 118, so that the combination of the table and the chair is completed while the hand clamping is avoided. Conversely, the chair can be pulled out by opening the lock catch 118, and the outer wheel of the inner ratchet wheel 124 and the outer ratchet wheel 124 are rotated while pressing the sliding block 125, so that the movable page 123 is rotated to the bottom of the desktop 119 and is fixed under the action of the sliding block 125, and the situation that the movable page 123 is accidentally injured is avoided.

Specifically, the fixed horizontal adjustment mechanism that is provided with in rear side of backup pad 112, horizontal adjustment mechanism includes fixed column 201, the quantity of fixed column 201 is two, and swing joint has rotary rod 202 between two fixed columns 201, the surface cover of rotary rod 202 is equipped with rotatory piece 203, the top fixedly connected with back board 204 of rotatory piece 203, through setting up fixed column 201, rotary rod 202, rotatory piece 203 and back board 204, thereby make back board 204 can follow rotatory piece 203 and rotary rod 202 and rotate.

Specifically, the one end that rotatory piece 203 was kept away from to rotary rod 202 runs through to the outside of fixed column 201, fixed column 201 symmetry be equipped with a plurality of spacing holes 205, rotary rod 202 is located the surface of the outside one end of fixed column 201 and has seted up spacing groove 207, the inner chamber of spacing groove 207 is provided with connecting rod 208, the both ends of connecting rod 208 all extend to the inner chamber of the spacing hole 205 of symmetry, the front side fixedly connected with handle 209 of connecting rod 208, through setting up spacing hole 205, spacing groove 207, connecting rod 208 and handle 209, thereby fix the rotation angle of back board 204.

Specifically, the equal fixedly connected with handrail frame 215 in both sides of cushion 113, the top of handrail frame 215 is provided with rotation axis 216, and the surface cover of rotation axis 216 is equipped with handrail pole 217, and one side fixedly connected with stopper 218 of handrail frame 215, and stopper 218 are located the bottom of handrail pole 217, through setting up handrail frame 215, rotation axis 216, handrail pole 217 and stopper 218, the person of being convenient for places the arm on the surface of handrail pole 217, increases user's comfort level.

Specifically, the equal fixedly connected with spliced pole 210 in both sides of back board 204, the inner chamber sliding connection of spliced pole 210 has displacement pole 211, the top fixedly connected with headrest 212 of displacement pole 211, fixed orifices 213 has all been seted up with one side of displacement pole 211 to spliced pole 210, the inner chamber swing joint of fixed orifices 213 has fixed strip 214, through setting up spliced pole 210, displacement pole 211, headrest 212, fixed orifices 213 and fixed strip 214, the user uses headrest 212, with this comfort level that improves the user, the while is highly adjusting and fixed headrest 212 under the cooperation of fixed orifices 213 and fixed strip 214.

The standard parts used in the present application document can be purchased from the market, and can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts the conventional means of mature bolt, rivet, welding and the like in the prior art, the machines, parts and equipment adopt the conventional models in the prior art, the control mode is automatically controlled by a controller, the control circuit of the controller can be realized by simple programming of technicians in the field, the control circuit belongs to the common knowledge in the field, and the present application document is mainly used for protecting mechanical devices, so the control mode and the circuit connection are not explained in detail in the present application.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a student uses table chair, includes table, chair, its characterized in that: the table comprises a table body (104) and a first height adjusting mechanism, the table body (104) is fixedly connected with the first height adjusting mechanism, the chair comprises a supporting plate (112) and a second height adjusting mechanism, the supporting plate (112) is fixedly connected with the second height adjusting mechanism, the table is movably connected with the chair, the first height adjusting mechanism comprises two first bases (101), the two first bases (101) are symmetrically distributed below the table body (104), the top of each first base (101) is fixedly connected with a first lifting block (102), the inner cavity of each first lifting block (102) is movably connected with a first lifting rod (103), the top of each first lifting rod (103) penetrates through the outer part of each first lifting block (102) and is fixedly connected to the bottom of the table body (104), one side of each first lifting rod (103) is provided with a plurality of first thread grooves (105), one side swing joint of first lifter block (102) has first bolt (106), first bolt (106) be close to the one end of first lifter block (102) extend to the inner chamber of first thread groove (105) and with the inner chamber threaded connection of first thread groove (105), fix the first support column (107) of fixedly connected with between two first lifter blocks (102) on two first bases (101), the first hand lead screw (108) of top fixedly connected with of first support column (107), the top of first hand lead screw (108) and the bottom fixed connection of the table body (104).

2. The desk and chair for students according to claim 1, wherein: the two second height adjusting mechanisms comprise two second bases (109), the two second bases (109) are symmetrically distributed below a supporting plate (112), a second lifting block (110) is fixedly connected to the top of the second base (109), a second lifting rod (111) is movably connected to an inner cavity of the second lifting block (110), the top of the second lifting rod (111) penetrates through the outer portion of the second lifting block (110) and is fixedly connected to the bottom of the supporting plate (112), a cushion (113) is fixedly connected to the top of the supporting plate (112), a plurality of second threaded grooves (114) are formed in one side of the second lifting rod (111), a second bolt (115) is movably connected to one side of the second lifting block (110), one end, close to the second lifting block (110), of the second bolt (115) penetrates through the inner cavity of the second lifting block (110) and is in threaded connection with the inner cavity of the second threaded grooves (114), the opposite sides of the two second bases (109) are fixedly connected with a second supporting column (116), the top of the second supporting column (116) is fixedly connected with a second hand-operated screw rod (117), and the top of the second hand-operated screw rod (117) is fixedly connected with the bottom of the supporting plate (112).

3. The desk and chair for students as claimed in claim 2, wherein: the upper portion of the supporting plate (112) close to one side of the table body (104) is provided with a groove, a lock catch (118) is fixedly mounted inside the groove, and the lock catch (118) is of a hinge structure.

4. A student's table and chair according to claim 3, wherein: the table body (104) comprises a table top (119) and a cabinet body (120), the table top (119) and the cabinet body (120) are connected through hinges on one side close to a chair, a groove is formed in the edge of the lower side of the table top (119) on one side close to the chair, a lock head, an inner ratchet wheel and an outer ratchet wheel (124), a sliding block (125) and an elastic device (126) are arranged in the groove, the lock head comprises a fixed leaf (121), a rotating shaft (122) and a movable leaf (123), the fixed leaf (121) is fixed in the groove, the movable leaf (123) corresponds to a lock catch (118), the movable leaf (123) and the fixed leaf (121) are rotatably connected with the fixed leaf (121) through the rotating shaft (122), the rotating shaft (122) is fixedly connected with one side of an outer wheel of the inner ratchet wheel and the shaft (124) is aligned with the center of the inner ratchet wheel and the outer ratchet wheel (124), an inner wheel and an inner ratchet wheel of the inner ratchet wheel and an outer ratchet wheel (124) are movably connected with a pawl, the opposite side of inside and outside ratchet (124) is equipped with slider (125), and there is the arch slider (125) one side near inside and outside ratchet (124), and the bulge is with the pawl contact, and the opposite side fixed connection resilient means (126) of slider (125), resilient means (126) are fixing inside the recess, one side fixed connection hydraulic pressure vaulting pole of chair is kept away from to cabinet body (120), and the expansion end and desktop (119) bottom contact of hydraulic pressure vaulting pole.

5. The desk and chair for students as claimed in claim 2, wherein: the fixed horizontal adjustment mechanism that is provided with of rear side of backup pad (112), horizontal adjustment mechanism includes fixed column (201), the quantity of fixed column (201) is two, and swing joint has rotary rod (202) between two fixed columns (201), the surface cover of rotary rod (202) is equipped with rotatory piece (203), the top fixedly connected with back board (204) of rotatory piece (203).

6. The desk and chair for students according to claim 5, wherein: the one end that rotatory piece (203) was kept away from in rotary rod (202) runs through to the outside of fixed column (201), the symmetry of fixed column (201) one side is equipped with a plurality of spacing holes (205), limiting groove (207) have been seted up on the surface that rotary rod (202) are located fixed column (201) outside one end, the inner chamber of spacing groove (207) is provided with connecting rod (208), the both ends of connecting rod (208) all extend to the inner chamber in the spacing hole (205) of symmetry, the front side fixedly connected with handle (209) of connecting rod (208).

7. The desk and chair for students as claimed in claim 2, wherein: the equal fixedly connected with handrail frame (215) in both sides of cushion (113), the top of handrail frame (215) is provided with rotation axis (216), the surface cover of rotation axis (216) is equipped with handrail pole (217), one side fixedly connected with stopper (218) of handrail frame (215), and stopper (218) are located the bottom of handrail pole (217).

8. The desk and chair for students according to claim 5, wherein: the equal fixedly connected with spliced pole (210) in both sides of back board (204), the inner chamber sliding connection of spliced pole (210) has displacement pole (211), the top fixedly connected with headrest (212) of displacement pole (211), fixed orifices (213) have all been seted up with one side of displacement pole (211) to spliced pole (210), the inner chamber swing joint of fixed orifices (213) has fixed strip (214).

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