CN112386034A

CN112386034A - Student chair with cervical vertebra protection function

Info

Publication number: CN112386034A
Application number: CN202011290965.0A
Authority: CN
Inventors: 姚健
Original assignee: Jiangxi Yuanyuan Educational Equipment Co ltd
Current assignee: Jiangxi Yuanyuan Educational Equipment Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-02-23

Abstract

The invention relates to a student chair, in particular to a student chair with a cervical vertebra protection function. The technical problem is how to design a student chair with the cervical vertebra protection function, which can protect the cervical vertebra of a student, can collect sundries and is more convenient. A student chair with a cervical vertebra protection function comprises: the universal wheels are installed on one side of the chassis at intervals; and the supporting column is fixedly connected to the middle part of one side of the chassis far away from the universal wheel. According to the invention, the supporting plate is adjusted to a proper height, and then the knob is twisted to rotate forwards and backwards alternately, so that the movable sliding block can be adjusted, when a student sits on the supporting plate, the back of the student leans against the backrest soft cushion through the movable sliding block, and the neck of the student is in contact with the neck protection pillow, so that the cervical vertebra can be protected.

Description

Student chair with cervical vertebra protection function

Technical Field

The invention relates to a student chair, in particular to a student chair with a cervical vertebra protection function.

Background

In the student study process, all need long-time study, then in order to make the better study of student, all need let the student sit on student's chair, at present, the long-time seat of student is on student's chair, because student's back can not adjust, leads to student's cervical vertebra to go wrong easily, and the easy debris that appears of student's study in-process, then need stand up and lose, it is more troublesome.

Therefore, a student chair with a cervical vertebra protection function, which can protect the cervical vertebra of a student, collect sundries and is convenient to use, needs to be designed and researched.

Disclosure of Invention

In order to overcome the defects that the backrest of a student chair cannot be adjusted, so that the cervical vertebra of a student is easy to have problems, and the student is easy to get up and throw away sundries in the learning process, the invention has the technical problems that: the utility model provides a can protect student's cervical vertebra, and can collect debris, more convenient student's chair of taking cervical vertebra protect function.

The technical scheme is as follows: a student chair with a cervical vertebra protection function comprises: the universal wheels are installed on one side of the chassis at intervals; the supporting column is fixedly connected to the middle of one side of the chassis far away from the universal wheel; the supporting mechanism is arranged on the supporting column and is used for enabling a student to sit; and the vertebra protection mechanism is arranged on the supporting mechanism and is used for protecting cervical vertebra.

Further, it is particularly preferable that the support mechanism includes: the supporting base is slidably sleeved at the end part of the supporting column far away from the chassis and is fixedly connected with the spine protection mechanism; the positioning screw rod is rotatably connected to one side of the supporting base in a penetrating manner through threads; the rubber top block is fixedly connected to the end part of the positioning screw rod close to the supporting column and is in contact fit with the supporting column; the supporting plate is fixedly connected to one side of the supporting base far away from the chassis; the side plates are fixedly connected to two sides close to the supporting base; and the supporting handrails are fixedly connected to the end parts of the side plates far away from the chassis.

In addition, it is particularly preferred that the spine protection mechanism comprises: the supporting vertical plate is fixedly connected to one side of the supporting base close to the positioning screw rod and the supporting plate; the neck protection pillow is rotatably connected to the end part of the supporting vertical plate far away from the chassis; the support frame is fixedly connected to one side, far away from the chassis, of the support vertical plate facing the support handrail; the movable sliding block is fixedly connected between one side in the supporting vertical plate and two ends of the supporting frame; the backrest cushion is fixedly connected between one sides of all the movable sliding blocks far away from the supporting frame; the positioning steel ropes are symmetrically and fixedly connected among all the movable sliding blocks in a penetrating manner; the knob is rotatably sleeved at one end of the positioning steel rope far away from the base plate through threads and matched with the movable sliding block.

Further, it is particularly preferable that the buffer mechanism further includes: the rotating disc is rotatably connected to the middle part of the supporting plate in a penetrating manner; the soft rubber ball is fixedly connected to the middle part of one side of the rotating disc far away from the chassis; the anti-abrasion sliding sleeves are fixedly connected to the supporting plate in a penetrating mode at intervals, and the number of the anti-abrasion sliding sleeves is four; the fixed seats are fixedly connected to one side of the supporting plate facing the chassis at intervals, the number of the fixed seats is four, and the fixed seats correspond to the anti-abrasion sliding sleeves; the elastic rope is fixedly connected to the fixed seat, and the tail end of the elastic rope penetrates through the anti-abrasion sliding sleeve; the cushion is fixedly connected among the four tail ends of the elastic ropes and is in contact fit with the soft rubber ball.

Further, it is particularly preferable that the height adjusting mechanism further includes: the square-shaped plate is fixedly connected to the circumferential direction of one side of the supporting plate facing the chassis; the X-shaped hinge rod is symmetrically and slidably arranged on one side of the chassis, and two ends of the tail of the X-shaped hinge rod are in sliding fit with one side of the clip plate; the movable pulley is rotatably connected to one end of the X-shaped hinge rod close to the chassis and is in contact fit with the chassis; the hook spring is connected between one side of the side plate and one end of the X-shaped hinge rod far away from the chassis; the positioning gear is fixedly sleeved at the end part of the X-shaped hinged rod far away from the chassis and the hook spring; the guide rods are symmetrically and fixedly connected to one side of the supporting plate close to the positioning gear in an embedded manner, and the number of the guide rods on each side is two; the fixed gear disc is sleeved between the two guide rods on each side in a sliding mode, the outer end of the fixed gear disc penetrates through the supporting plate, and the fixed gear disc is meshed with the positioning gear; the reset spring is connected between one side in the fixed gear disc and the inside of the supporting plate and sleeved on the guide rod; the fixed rod is connected to two sides in a rotating mode and is arranged between the middle portions of the X-shaped hinged rods.

In addition, it is particularly preferable that the vehicle further includes a load bearing mechanism, and the load bearing mechanism includes: the storage box is fixedly connected to one side of one of the supporting armrests facing the chassis and communicated with the supporting armrests; the bearing plate is slidably arranged between the two sides in the storage box and matched with the supporting handrail; the dustproof cover is rotatably connected to one of the support armrests far away from the chassis, and the dustproof cover is matched with the support armrests.

Further, it is particularly preferable that the apparatus further comprises a placing mechanism including: the fixed shaft is rotatably connected to one side of the support handrail which is not provided with the dustproof cover; a load ring fixedly connected to an end of the fixed shaft facing the chassis; and the containing cup is placed in the load ring in a sliding manner.

In addition, it is particularly preferable that the load ring is made of iron.

Has the advantages that:

1. through adjusting the backup pad to suitable height, twist the positive and negative rotation in turn of knob again, can adjust movable slider, when the student sat in the backup pad, back accessible movable slider leaned on the soft pad of back, and neck and rib pillow contact, so, can protect the cervical vertebra.

2. Through the effect of buffer gear, can make the student sit more comfortable.

3. Through the effect of placing the mechanism, can place debris, so, conveniently handle the collection of debris.

Drawings

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

FIG. 2 is a schematic view of a first partial body structure according to the present invention.

Fig. 3 is an enlarged schematic view of part a of the present invention.

FIG. 4 is a schematic view of a second partial body structure according to the present invention.

Fig. 5 is an enlarged view of part B of the present invention.

Fig. 6 is a perspective view of a third embodiment of the present invention.

Wherein the figures include the following reference numerals: 1. chassis, 2, universal wheels, 3, support columns, 4, support mechanisms, 41, support bases, 42, support plates, 43, side plates, 44, support handrails, 45, positioning screws, 46, rubber top blocks, 5, spine protection mechanisms, 51, support vertical plates, 52, support frames, 53, movable sliding blocks, 54, positioning steel ropes, 55, backrest cushions, 56, neck protection pillows, 57, knobs, 6, buffer mechanisms, 61, rotating discs, 62, soft rubber balls, 63, fixing seats, 64, anti-abrasion sliding sleeves, 65, elastic ropes, 66, cushions, 7, height adjusting mechanisms, 71, X-shaped hinged rods, 72, fixing rods, 73, movable pulleys, 74, hook springs, 75, positioning gears, 76, fixed discs, 77, guide rods, 78, reset springs, 79, clip plates, 8, bearing mechanisms, 81, storage boxes, 82, bearing plates, 83, dust covers, 9 and placement mechanisms, 91. a load ring 92, a fixed shaft 93 and a containing cup.

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.

Example 1

A student chair with a cervical vertebra protection function is shown in figures 1-3 and comprises a chassis 1, universal wheels 2, support columns 3, a support mechanism 4 and a spine protection mechanism 5, wherein the support columns 3 are fixedly connected to the middle of the left side of the top of the chassis 1, the support columns 3 are provided with the support mechanism 4, the support mechanism 4 is provided with the spine protection mechanism 5, and the universal wheels 2 are uniformly arranged at intervals at the bottom of the chassis 1.

Supporting mechanism 4 is including supporting base 41, the backup pad 42, curb plate 43, support handrail 44, positioning screw 45 and

rubber kicking block

46, 3 top slidingtype covers on support column have supporting base 41, support base 41 left surface upper portion and vertebra protection mechanism 5 fixed connection, support base 41 left surface lower part middle screw thread formula be equipped with positioning screw 45, positioning screw 45 right-hand member rigid coupling has rubber kicking block 46,

rubber kicking block

46 and 3 contact cooperations of support column, support base 41 top rigid coupling has backup pad 42, support all the rigid coupling has curb plate 43 in the middle of 41 front and back both sides face upper portion of base, curb plate 43 top rigid coupling has support handrail 44.

The vertebra protection mechanism 5 comprises a supporting vertical plate 51, a supporting frame 52, movable sliding blocks 53, positioning steel ropes 54, a backrest cushion 55, a neck protection pillow 56 and a knob 57, the supporting vertical plate 51 is fixedly connected to the middle of the upper portion of the left side of the supporting base 41, the supporting frame 52 is fixedly connected to the upper portion of the left side in the supporting vertical plate 51, a row of movable sliding blocks 53 are connected between the two ends of the right side of the supporting frame 52 and the lower portion of the left side in the supporting vertical plate 51, the backrest cushion 55 is fixedly connected between the right sides of all the movable sliding blocks 53, the positioning steel ropes 54 are arranged between the front portions and between the rear portions of all the movable sliding blocks 53, threads are arranged on the upper portion of each positioning steel rope 54, the knob 57.

At first the student removes this device through universal wheel 2 before the desk, twists supporting mechanism 4 function according to self demand again, and when supporting mechanism 4 function was adjusted to the height that suitable student sat, stopped to twist supporting mechanism 4, the student can sit on supporting mechanism 4, and leans on to study on vertebra protection mechanism 5, and vertebra protection mechanism 5 then protects student's vertebra and neck. After the student finishes learning, the student can get up from the supporting mechanism 4.

When the device moves to the front of a desk, the positioning screw 45 is twisted to move leftwards, the positioning screw 45 moves leftwards to drive the rubber top block 46 to move leftwards, the rubber top block 46 moves leftwards to be separated from the supporting column 3, the supporting base 41 can be pulled to move upwards and downwards, the supporting base 41 moves upwards and downwards to drive the supporting plate 42 to move upwards and downwards, the supporting plate 42 moves upwards and downwards to the height suitable for a student to sit, the supporting base 41 stops being pulled to move upwards and downwards, the twisting positioning screw 45 moves rightwards to drive the rubber top block 46 to move rightwards, the rubber top block 46 moves rightwards to be in contact with the supporting column 3, the twisting positioning screw 45 stops, the rubber top block 46 is matched with the supporting column 3 to fix the supporting base 41, the student can sit on the.

After the height has been adjusted to backup pad 42, the student can twist knob 57 positive and negative rotation in turn according to self demand, knob 57 positive and negative rotation in turn compresses and relaxes activity slider 53 through location steel cable 54 is continuous, the tighter of activity slider 53 compression then leans on harder, otherwise then softer, after activity slider 53 has been adjusted, stop twisting knob 57, and then the student sits on backup pad 42, the student is reliable on back cushion 55, back cushion 55 supports the student back through activity slider 53, and the neck and the contact of rib pillow 56 of student are supported. After the student finishes learning, the student can get up from the supporting plate 42, the back of the student is separated from the backrest cushion 55, and the neck of the student is separated from the neck protection pillow 56. Thus, the cervical vertebra can be protected.

Example 2

On the basis of embodiment 1, as shown in fig. 1, fig. 4 and fig. 5, the device further comprises a buffer mechanism 6, the buffer mechanism 6 comprises a rotating disc 61, a soft rubber ball 62, a fixed seat 63, an anti-abrasion sliding sleeve 64, elastic ropes 65 and a cushion 66, the middle part of the supporting plate 42 is embedded and rotatably connected with the rotating disc 61, the middle part of the top of the rotating disc 61 is fixedly connected with the soft rubber ball 62, the circumferential uniformly-spaced embedded fixed connection of the supporting plate 42 is provided with the anti-abrasion sliding sleeve 64, the circumferential uniformly-spaced fixed connection of the bottom of the supporting plate 42 is provided with the fixed seat 63, the fixed seat 63 is fixedly connected with the elastic ropes 65, the tail ends of the elastic ropes 65 penetrate through the anti-abrasion sliding sleeve 64, the cushion 66 is fixedly connected between the tail ends.

The height adjusting mechanism 7 comprises an X-shaped hinged rod 71, a fixed rod 72, a movable pulley 73, a hook spring 74, a positioning gear 75, a fixed gear disc 76, a guide rod 77, a return spring 78 and a return plate 79, wherein the bottom of the supporting plate 42 is circumferentially fixedly connected with the return plate 79, the X-shaped hinged rod 71 is arranged between the front side and the rear side of the bottom of the return plate 79 and the front side and the rear side of the top of the chassis 1 in a sliding manner respectively, the movable pulley 73 is rotatably connected at the bottom end of the right side of the X-shaped hinged rod 71 and is in sliding fit with the interior of the chassis 1, the fixed rod 72 is rotatably connected between the middle parts of the X-shaped hinged rods 71 at the front side and the rear side of the chassis 1, the hook spring 74 is connected between the rear part of the top end of the right side of the X-shaped hinged rod 71 and the lower part of the front side of the side, a fixed gear disc 76 is slidably arranged between the guide rods 77 on the left side and the right side, the outer end of the fixed gear disc 76 penetrates through the support plate 42 to be in sliding fit with the support plate, the positioning gear 75 is positioned in the fixed gear disc 76 and is meshed with the fixed gear disc, a return spring 78 is connected between the left side and the right side of the upper portion of one side in the fixed gear disc 76 and the inside of the support plate 42, and the return spring 78 is.

After the backup pad 42 altitude mixture control is good, the student can sit on cushion 66, and cushion 66 makes the compression of soft glue ball 62, because the effect of soft glue ball 62, the student sits more comfortablely on cushion 66, and stretch cord 65 and the cooperation of fixing base 63 are spacing to cushion 66, avoid it to break away from soft glue ball 62. After the student finishes learning, the student can get up from the seat cushion 66. Therefore, students can sit more comfortably during learning.

Firstly, students twist the positioning screw rod 45 to move leftwards to drive the rubber top block 46 to be separated from the supporting column 3, then pull the fixed gear disc 76 to move outwards, the reset spring 78 compresses, the fixed gear disc 76 moves outwards to be separated from the positioning gear 75, the fixed gear disc 76 can be pulled to move up and down, the fixed gear disc 76 moves up and down to drive the support plate 42 to move up and down through the guide rod 77, the support plate 42 moves up and down to drive the X-shaped hinge rod 71 to be unfolded and folded continuously, the hook spring 74 also stretches continuously, when the supporting plate 42 moves up and down to a proper height, the fixed gear disc 76 stops being pulled to move up and down, the supporting plate 42 also stops moving up and down, the fixed gear disc 76 is released, the fixed gear disc 76 moves inwards to reset and is meshed with the positioning gear 75 under the action of the reset spring 78, the fixed gear disc 76 is matched with the positioning gear 75 to fix the X-shaped hinge rod 71, and the supporting plate 42 is also fixed. Thus, the height of the supporting plate 42 can be adjusted by students conveniently.

Example 3

On the basis of the embodiments 1 and 2, as shown in fig. 1 and 6, the utility model further includes a bearing mechanism 8, the bearing mechanism 8 includes a storage box 81, a bearing plate 82 and a dust cover 83, the storage box 81 is fixedly connected to the rear side of the bottom of the rear side supporting armrest 44, the bearing plate 82 is slidably arranged between the left side and the right side of the storage box 81, the bearing plate 82 is further matched with the supporting armrest 44, the dust cover 83 is rotatably connected to the rear side of the top of the rear side supporting armrest 44, and the dust cover 83 is matched with the rear side supporting armrest 44.

The device is characterized by further comprising a placing mechanism 9, wherein the placing mechanism 9 comprises a load ring 91, a fixed shaft 92 and a containing cup 93, the fixed shaft 92 is rotatably connected to the right part of the front side supporting handrail 44, the load ring 91 is fixedly connected to the bottom end of the fixed shaft 92, and the containing cup 93 is placed in an inner sliding mode of the load ring 91.

When a student sits on the supporting plate 42, the dust cover 83 can be pulled to be opened, then articles to be stored are placed in the storage box 81, the bearing plate 82 is pulled to move upwards to the maximum stroke, then the bearing plate 82 is pulled to swing downwards to be in contact with the front side supporting handrail 44 to be limited, and the student can learn or place the articles on the bearing plate 82. After the student finishes learning, the bearing plate 82 is pulled to swing upwards to be in a vertical state, the bearing plate 82 is loosened, the bearing plate 82 moves downwards to reset under the action of gravity, and then the dust cover 83 is pulled to swing downwards to close. Thus, the student can place articles.

When the students learn, a large amount of sundries can appear, and the students can throw the sundries into the containing cup 93. When a proper amount of sundries are contained in the containing cup 93, the containing cup 93 can be taken down from the load ring 91, then all the sundries are poured out, and after all the sundries are poured out, the containing cup 93 is put back into the load ring 91. Therefore, the sundries can be conveniently collected and treated.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. The utility model provides a take student's chair of cervical vertebra protect function, characterized by, including:

the device comprises a chassis (1), wherein universal wheels (2) are mounted on one side of the chassis (1) at intervals;

the supporting column (3) is fixedly connected to the middle of one side of the chassis (1) far away from the universal wheel (2);

the supporting mechanism (4) is arranged on the supporting column (3) and is used for enabling a student to sit;

and the vertebra protection mechanism (5) is arranged on the supporting mechanism (4) and is used for protecting cervical vertebra.

2. The student chair with the cervical vertebra protection function as claimed in claim 1, wherein the support mechanism (4) comprises:

the supporting base (41) is slidably sleeved at the end part of the supporting column (3) far away from the chassis (1), and the supporting base (41) is fixedly connected with the spine protection mechanism (5);

the positioning screw rod (45) is rotatably connected to one side of the supporting base (41) in a penetrating mode through threads;

the rubber top block (46), the rubber top block (46) is fixedly connected to the end part of the positioning screw rod (45) close to the supporting column (3), and the rubber top block is in contact fit with the supporting column (3);

the supporting plate (42), the supporting plate (42) is fixedly connected to one side of the supporting base (41) far away from the chassis (1);

the side plates (43), the side plates (43) are fixedly connected to two sides close to the supporting base (41);

the supporting handrail (44) is fixedly connected to the end part of the side plate (43) far away from the chassis (1).

3. The student chair with the cervical vertebra protection function as claimed in claim 2, wherein the spine protection mechanism (5) comprises:

the supporting vertical plate (51), the supporting vertical plate (51) is fixedly connected to one side of the supporting base (41) close to the positioning screw rod (45) and the supporting plate (42);

the neck protection pillow (56), the neck protection pillow (56) is rotatably connected to the end part of the supporting vertical plate (51) far away from the chassis (1);

the supporting frame (52) is fixedly connected to one side, far away from the chassis (1), of the inner side of the supporting vertical plate (51) facing the supporting handrail (44);

the movable sliding block (53) is fixedly connected between one side in the supporting vertical plate (51) and two ends of the supporting frame (52);

the backrest cushion (55), the backrest cushion (55) is fixedly connected between one sides of all the movable sliding blocks (53) far away from the supporting frame (52);

the positioning steel ropes (54), the positioning steel ropes (54) are symmetrically and fixedly connected among all the movable sliding blocks (53) in a penetrating manner;

the knob (57) is rotatably sleeved at one end, far away from the chassis (1), of the positioning steel rope (54) through threads, and the knob (57) is matched with the movable sliding block (53).

4. A student chair with cervical vertebra protection function as claimed in claim 3, further comprising a buffer mechanism (6), wherein the buffer mechanism (6) comprises:

the rotating disc (61), the rotating disc (61) is rotatably connected to the middle part of the supporting plate (42) in a penetrating way;

the soft rubber ball (62) is fixedly connected to the middle of one side of the rotating disc (61) far away from the chassis (1);

the anti-abrasion sliding sleeves (64) are fixedly connected to the supporting plate (42) in a penetrating mode at intervals, and the number of the anti-abrasion sliding sleeves (64) is four;

the fixed seats (63) are fixedly connected to one side, facing the base plate (1), of the supporting plate (42) at intervals, the number of the fixed seats (63) is four, and the fixed seats (63) correspond to the anti-abrasion sliding sleeves (64);

the elastic rope (65) is fixedly connected to the fixed seat (63), and the tail end of the elastic rope (65) penetrates through the anti-abrasion sliding sleeve (64);

the cushion (66), cushion (66) rigid coupling in four between elasticity rope (65) tail end, it with flexible glue ball (62) contact cooperation.

5. The student chair with the cervical vertebra protection function as claimed in claim 4, further comprising a height adjustment mechanism (7), wherein the height adjustment mechanism (7) comprises:

the circular plate (79) is fixedly connected to the circumferential direction of one side, facing the supporting plate (42), of the chassis (1);

the X-shaped hinge rod (71) is symmetrically and slidably placed on one side of the chassis (1), and two ends of the tail of the X-shaped hinge rod (71) are in sliding fit with one side of the circular plate (79);

the movable pulley (73) is rotatably connected to one end of the X-shaped hinge rod (71) close to the chassis (1), and is in contact fit with the chassis (1);

a hook spring (74), wherein the hook spring (74) is connected between one side of the side plate (43) and one end of the X-shaped hinge rod (71) far away from the chassis (1);

the positioning gear (75) is fixedly sleeved at the end part of the X-shaped hinged rod (71) far away from the chassis (1) and the hook spring (74);

the guide rods (77) are symmetrically and fixedly connected to one side of the support plate (42) close to the positioning gear (75) in an embedded mode, and the number of the guide rods (77) on each side is two;

the fixed gear disc (76), the fixed gear disc (76) is slidably sleeved between the two guide rods (77) on each side, the outer end of the fixed gear disc penetrates through the supporting plate (42), and the fixed gear disc (76) is meshed with the positioning gear (75);

the return spring (78), the said return spring (78) links to the said fixed gear (76) inside one side and the said inside of shoe plate (42), it is fitted on the said guide arm (77);

the fixing rod (72) is rotatably connected between the middle parts of the X-shaped hinged rods (71) at two sides.

6. The student chair with the cervical vertebra protection function as claimed in claim 5, further comprising a load bearing mechanism (8), wherein the load bearing mechanism (8) comprises:

the storage box (81), the storage box (81) is fixedly connected to one side of one of the supporting armrests (44) facing the chassis (1) and communicated with the supporting armrests;

the bearing plate (82) is placed between two sides in the storage box (81) in a sliding mode, and the bearing plate (82) is matched with the supporting handrail (44);

the dustproof cover (83) is rotatably connected to one side of the support handrail (44) far away from the chassis (1) and matched with the support handrail (44).

7. The student chair with the cervical vertebra protection function as claimed in claim 6, further comprising a placing mechanism (9), wherein the placing mechanism (9) comprises:

the fixed shaft (92) is rotatably connected to one side of the support handrail (44) which is not provided with the dust cover (83);

a load ring (91), wherein the load ring (91) is fixedly connected to the end part of the fixed shaft (92) facing the chassis (1);

and the storage cup (93) is placed in the loading circular ring (91) in a sliding manner.

8. The student chair with the cervical vertebra protection function as claimed in claim 7, wherein the load-carrying ring (91) is made of iron.