CN113384079A

CN113384079A - Special student desk for examination

Info

Publication number: CN113384079A
Application number: CN202110691269.9A
Authority: CN
Inventors: 谢飞良; 徐升; 马志红; 饶振杰
Original assignee: Jiangxi Nancheng County Fahua Industry Co ltd
Current assignee: Jiangxi Nancheng County Fahua Industry Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-09-14

Abstract

The invention relates to a student desk, in particular to a student desk special for examination. The invention aims to provide a student desk special for examinations, which can prevent cheating and has a height adjusting function. A student desk special for examination comprises two bases; the top of the base is provided with a groove plate in a sliding manner; the drawer is arranged between the tops of the groove plates; the top of the drawer is provided with a table plate; the wheels are symmetrically and rotatably arranged at the bottom of the base; the placing component is arranged on the upper side of the base on one side; the drawer is provided with an isolation component. According to the invention, the wedge-shaped block is moved forwards through the pull rod, the connecting rod is driven to move forwards, the third spring is compressed, so that the wedge-shaped block does not block the partition plate, the partition plate is driven to move upwards under the action of the reset of the second spring, the cheating probability is effectively reduced, and the effect of stopping cheating is achieved.

Description

Special student desk for examination

Technical Field

The invention relates to a student desk, in particular to a student desk special for examination.

Background

The surfaces of desks of the existing office desks and schools are both planar, students are easy to do skills and answers without starting questions in the process of tense examinations, and therefore the students are required to copy answers of classmates or steal cheating paper slips and the like, when teachers carelessly neglect, the students are easy to cheat, and the students are unfair to other classmates, so that the teachers are required to strictly monitor the students, and the operation is very inconvenient.

In summary, it is necessary to design a student desk for examinations with height adjustment function to prevent cheating, so as to solve the above problems.

Disclosure of Invention

In order to overcome the defects of the traditional examination desk, the invention has the technical problems that: provides a student desk special for examination, which can prevent cheating and has the function of adjusting height.

The technical scheme is as follows: a student desk special for examination comprises: the number of the bases is two; the top of the base is provided with a groove plate in a sliding manner; the drawer is arranged between the tops of the groove plates; the top of the drawer is provided with a table plate; the wheels are symmetrically and rotatably arranged at the bottom of the base; the placing component is arranged on the upper side of the base on one side; the drawer is provided with an isolation component.

In a preferred embodiment of the present invention, the placement module comprises: a placing frame is arranged on the upper side of the base on one side; the buckle is arranged on one side inside the placing frame in a sliding mode; the first spring is arranged between the buckle and the placing frame; a hook is arranged on one side of the groove plate on the other side.

In a preferred embodiment of the present invention, the isolation assembly comprises: the inner side of the drawer is provided with a clapboard in a sliding manner, and the clapboard is connected with the table plate in a sliding manner; the partition plate and two sides of the drawer are uniformly provided with four second springs at intervals; the wedge blocks are symmetrically arranged on two sides of the drawer in a sliding manner and are matched with the partition plate; third springs are arranged between the wedge-shaped blocks and the drawer; the connecting rods are connected between the wedge-shaped blocks; the pull rod is arranged on the wedge block on one side of the pull rod, and the pull rod is connected with the drawer in a sliding mode.

In a preferred embodiment of the present invention, the present invention further comprises an adjusting assembly, the adjusting assembly comprises: the hinges are rotatably connected to the base; the inner sides of the hinges are provided with baffle plates; the sliding rods are arranged on the inner sides of the groove plates in a sliding mode and are connected with the base in a sliding mode; the pedals are arranged on one sides of the lower parts of the sliding rods and are positioned on the inner sides of the baffles; the fourth springs are arranged between the sliding rod and the base; the tops of the sliding rods are symmetrically and rotatably provided with rotating rods; the upper sides in the groove plates are provided with first guide rods; the clamping blocks are arranged on two sides of the first guide rod in a sliding mode and are rotatably connected with the rotating rod, and the clamping blocks are matched with the groove plate; fifth springs are symmetrically arranged between the clamping blocks and the groove plates and are sleeved on the first guide rods; the special-shaped rod is arranged in the base on one side in a sliding mode, the special-shaped rod is connected with the groove plate and the drawer in a sliding mode, the sliding rod is matched with the special-shaped rod, and the special-shaped rod is matched with the pull rod.

In a preferred embodiment of the present invention, the present invention further comprises a prompt component, wherein the prompt component comprises: a second guide rod is arranged in the base on one side; the rack is arranged on the second guide rod in a sliding mode and matched with the groove plate; a sixth spring is arranged between the rack and the right base and sleeved on the second guide rod; the first rotating shaft is rotatably arranged on one side inside the placing frame; a first gear is arranged on one side of the first rotating shaft and meshed with the rack; the second rotating shaft is rotatably arranged on one side of the top of the placing frame; the bevel gear set is connected between the second rotating shaft and the first rotating shaft and consists of two bevel gears which are respectively connected to the first rotating shaft and the second rotating shaft and are meshed with each other; the dial plate is rotatably arranged on the upper side of the second rotating shaft; the bearing is rotatably arranged at the top of the second rotating shaft; the upper side of the second rotating shaft is connected with a pointer, and the pointer is matched with the dial plate.

In a preferred embodiment of the present invention, the brake assembly further comprises: the inner sides of the bases are symmetrically provided with supporting rods; the special-shaped frames are arranged between the supporting rods in a sliding manner, and the sliding rods are matched with the special-shaped frames; seventh springs are symmetrically arranged between the special-shaped frame and the base and are sleeved on the supporting rod; the two sides of the special-shaped frame are rotatably provided with the gear-lacking wheels; and the second gear is matched with the missing gear.

In a preferred embodiment of the invention, the device further comprises a clamping component, and the clamping component is arranged on the inner side of the base.

In a preferred embodiment of the present invention, the present invention further comprises a clamping assembly, wherein the clamping assembly comprises: the third guide rods are symmetrically arranged on the two sides in the base in a sliding manner; the wedge-shaped rods are arranged between the outer sides of the third guide rods on the same side and matched with the special-shaped frame; the eighth springs are arranged between the wedge-shaped rod and the base and sleeved on the third guide rod; the pull ring, wedge pole inboard all are connected with the pull ring, and the pull ring all is connected with base sliding type.

The invention has the following advantages: 1. according to the invention, the wedge-shaped block is moved forwards through the pull rod, the connecting rod is driven to move forwards, the third spring is compressed, so that the wedge-shaped block does not block the partition plate, the partition plate is driven to move upwards under the action of the reset of the second spring, the cheating probability is effectively reduced, and the effect of stopping cheating is achieved.

2. When moving to the table needle through the minimum digital display piece in the second pivot, the suggestion student, student's table height this moment is in minimum height, when the biggest digital display piece rotates to table needle department in the second pivot, the suggestion student, student's table this moment is in maximum height, has the function of suggestion height-adjusting.

3. Through the dysmorphism frame with lack the gear and remove downwards, the seventh spring is compressed, lacks the gear at this moment and downwards with the second gear chucking for second gear and wheel are no longer rotatory, increase the steadiness of student when the examination, have played the effect of brake, and the brake effect is better, increases the stability of student's table.

Drawings

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

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

Fig. 3 is a schematic perspective view of another embodiment of the present invention.

FIG. 4 is a second partial structure diagram of the present invention.

Fig. 5 is a partially enlarged view of the portion a of the present invention.

FIG. 6 is a third partial structural view of the present invention.

Fig. 7 is a partially enlarged view of the portion B of the present invention.

Fig. 8 is a schematic diagram of a fourth partial structure of the present invention.

Fig. 9 is a partially enlarged view of the portion C of the present invention.

FIG. 10 is a schematic diagram of a fifth partial structure according to the present invention.

Fig. 11 is a partial enlarged view of portion D of the present invention.

FIG. 12 is a schematic view of a sixth partial structure according to the present invention.

Fig. 13 is a partial enlarged view of the portion E of the present invention.

Fig. 14 is a partially enlarged view of portion F of the present invention.

Fig. 15 is a schematic perspective view of another angle of the present invention.

Labeled as: 1_ base, 2_ slot plate, 3_ drawer, 4_ table, 5_ wheel, 6_ placing component, 601_ placing frame, 602_ clip, 603_ first spring, 604_ hook, 7_ isolation component, 701_ partition plate, 702_ second spring, 703_ wedge, 704_ third spring, 705_ link, 706_ pull rod, 8_ adjustment component, 801_ hinge, 802_ baffle, 803_ slide rod, 804_ pedal, 805_ fourth spring, 806_ turn rod, 807_ block, 808_ first guide rod, 809_ fifth spring, 810_ shaped rod, 9_ prompt component, 901_ second guide rod, 902_ rack, 903_ sixth spring, 904_ first turn shaft, 905_ first gear, 906_ bevel gear set, 907_ second turn shaft, 908_ 909_ bearing, 910_ pointer, 10_ brake component, 1001_ support rod, 1002_ shaped rack, 1003_ seventh spring, 1004_ missing gear, 1005_ second gear, 11_ jamming assembly, 1101_ third guiding bar, 1102_ wedge bar, 1103_ eighth spring, 1104_ pull ring.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Example 1

The utility model provides a special type student's table takes an examination, as shown in fig. 1-7, including base 1, frid 2, drawer 3, table 4, wheel 5, place subassembly 6 and isolation component 7, base 1 has two, 1 top of base all slidingtype is equipped with frid 2, be equipped with drawer 3 between 2 tops of frid, 3 tops of drawer are equipped with table 4, the equal front and back symmetry rotary type in base 1 bottom is equipped with

wheel

5, 1 upside of base on right side is equipped with places subassembly 6, be equipped with isolation component 7 on the drawer 3.

Place subassembly 6 including placing frame 601, buckle 602, first spring 603 and couple 604, the base 1 upside on right side is equipped with places frame 601, places the inside back sliding type of frame 601 and is equipped with buckle 602, buckle 602 and place and be equipped with first spring 603 between the frame 601, and left frid 2 left side is equipped with couple 604.

The isolation assembly 7 comprises a partition plate 701, a second spring 702, a wedge block 703, a third spring 704, a connecting rod 705 and a pull rod 706, the partition plate 701 is arranged on the inner side of the drawer 3 in a sliding mode, the partition plate 701 is connected with the table plate 4 in a sliding mode, the four second springs 702 are evenly arranged on the partition plate 701 and the left side and the right side of the drawer 3 at intervals, the wedge blocks 703 are symmetrically arranged on the left side and the right side of the drawer 3 in a sliding mode, the wedge blocks 703 are matched with the partition plate 701, the third spring 704 is arranged between the wedge blocks 703 and the drawer 3, the connecting rod 705 is connected between the wedge blocks 703, the pull rod 706 is arranged on the wedge block 703 on the right.

In the original state, the second spring 702 is in a compressed state, when a student takes an examination, the student desk is moved to an examination place through the rotation effect of the wheels 5, the student manually moves the groove plate 2 up and down to adjust the height according to different heights, the student drives the drawer 3 and the desk plate 4 to move up and down, after the height adjustment is completed, the student places a water bottle in the placement frame 601, the water bottle is in contact with the buckle 602, the water bottle extrudes the buckle 602 backwards, the first spring 603 is compressed, the buckle 602 fixes the water bottle, then the examination tool is hung on the hook 604, the pull rod 706 is held to move the wedge-shaped block 703 forwards, the connecting rod 705 is driven to move forwards, the third spring 704 is compressed, the wedge-shaped block does not block the partition 701 any more, the partition 701 is driven to move upwards under the reset effect of the second spring 702, the cheating probability is effectively reduced, at this time, the pull rod 706 is released, under the effect of the third spring 704, the wedge block 703, the connecting rod 705 and the pull rod 706 are driven to move backwards to reset, after the examination of the student is finished, the student moves the partition plate 701 downwards to be in contact with the wedge block 703, the second spring 702 is compressed to push the wedge block 703 and the connecting rod 705 to move forwards, after the partition plate 701 moves back to the original position, the wedge block 703 and the connecting rod 705 reset backwards under the action of the third spring 704, the partition plate 701 is clamped by the wedge block 703, then the water bottle is taken out to be separated from the buckle 602, under the action of the first spring 603, the buckle 602 is driven to move forwards to reset, and finally, the student desk is moved to a proper position through the rotation of the wheel 5.

Example 2

On the basis of embodiment 1, as shown in fig. 8 to 15, the adjusting device further includes an adjusting assembly 8, the adjusting assembly 8 includes a hinge 801, a baffle 802, a slide bar 803, a pedal 804, a fourth spring 805, a rotating rod 806, a block 807, a first guide bar 808, a fifth spring 809 and a special-shaped bar 810, the hinge 801 is rotatably connected to the base 1, the baffle 802 is disposed inside the hinge 801, the slide bars 803 are slidably disposed inside the channel plate 2, the slide bars 803 are slidably connected to the base 1, the pedal 804 is disposed on the front side of the lower portion of the slide bars 803, the pedal 804 is disposed inside the baffle 802, the fourth spring 805 is disposed between the slide bars 803 and the base 1, the rotating rod 806 is symmetrically disposed on the top of the slide bars 803, the first guide bar 808 is disposed on the upper side inside the channel plate 2, the block 807 is disposed on the left and right sides of the first guide bar 808, the block 807 is engaged with the channel plate 2, the block 807 is rotatably connected to the rotating rod 806, fifth springs 809 are symmetrically arranged between the clamping block 807 and the groove plate 2 in a front-back manner, the fifth springs 809 are all sleeved on the first guide rod 808, a special-shaped rod 810 is arranged inside the right base 1 in a sliding manner, the special-shaped rod 810 is connected with the groove plate 2 and the drawer 3 in a sliding manner, the sliding rod 803 is matched with the special-shaped rod 810, and the special-shaped rod 810 is matched with the pull rod 706.

When the height of the student desk needs to be adjusted, the student rotates the baffle 802 outwards, the baffle 802 does not cover the pedal 804 any more, then the student steps on the pedal 804, so as to drive the sliding rod 803 to move downwards, the fourth spring 805 is compressed, further the rotating rod 806 is driven to rotate inwards, the rotating rod 806 drives the clamping block 807 to move inwards, the fifth spring 809 is compressed, the clamping block 807 does not clamp the trough plate 2 any more, then the student moves the trough plate 2 upwards, the height of the student desk is adjusted, the sliding rod 803 moves downwards to be in contact with the special-shaped rod 810, the special-shaped rod 810 is driven to move downwards, the pull rod 706 and the wedge 703 on the right front side are pushed to move forwards, the wedge 703 is separated from the partition plate 701, the partition plate 701 is driven to move upwards by the resetting effect of the second spring 702, the partition plate 701 is adjusted to be at the same time, the cheating prevention function is started by the partition plate 701, at this time, the pedal 804 is released, the slide bar 803 moves upwards to separate from the special-shaped bar 810, the wedge block 703 at the right front side resets to drive the special-shaped bar 810 to reset, and simultaneously, under the action of the fifth spring 809, the fixture block 807 is driven to move outwards to be clamped on the groove plate 2, the fixture block 807 moves outwards to enable the rotating rod 806 to rotate outwards to reset, and finally the baffle 802 is pushed to rotate inwards to block the pedal 804, so that the effects of conveniently adjusting the height of the student desk and automatically lifting the partition plate are achieved.

The prompting device comprises a prompting component 9, the prompting component 9 comprises a second guide rod 901, a rack 902, a sixth spring 903, a first rotating shaft 904, a first gear 905, a bevel gear group 906, a second rotating shaft 907, a dial 908, a bearing 909 and a pointer 910, the second guide rod 901 is arranged in a right base 1, the rack 902 is arranged on the second guide rod 901 in a sliding mode, the rack 902 is matched with a slotted plate 2, the sixth spring 903 is arranged between the rack 902 and the right base 1, the sixth spring 903 is sleeved on the second guide rod 901, the first rotating shaft 904 is arranged on the front side in a placing frame 601 in a rotating mode, the first gear 905 is arranged on the rear side of the first rotating shaft 904, the first gear 905 is meshed with the rack 902, the second rotating shaft 907 is arranged on the front side of the top of the placing frame 601 in a rotating mode, the bevel gear group 906 is connected between the second rotating shaft 907 and the first rotating shaft 904, the bevel gear group 906 is composed of two bevel gears, the two bevel gears are respectively connected to the first rotating shaft 904 and the second rotating shaft 907, the bevel gears are meshed with each other, a dial 908 is rotatably arranged on the upper side of the second rotating shaft 907, a bearing 909 is rotatably arranged on the top of the second rotating shaft 907, a pointer 910 is connected to the upper portion of the second rotating shaft 907, and the pointer 910 is matched with the dial 908.

When the pedal 804 is stepped on, a student manually rotates the second rotating shaft 907 to drive the bevel gear group 906, the first rotating shaft 904 and the first gear 905 to rotate, further drive the rack 902 to move upwards to be in contact with the slot plate 2, the sixth spring 903 is stretched, the rack 902 drives the slot plate 2 to move upwards, the second rotating shaft 907 rotates to drive the pointer 910 to rotate, when the pointer 910 rotates to point, the student is prompted, the height of the student desk at the moment is at the lowest height, when the pointer 910 rotates to point, the maximum number in the slot plate 908 is prompted, the student desk at the moment is at the highest height, when the height of the slot plate 2 does not need to be adjusted, the second rotating shaft 907 stops rotating, and under the action of the sixth spring 903, the rack 902 is driven to be separated from the slot plate 2 downwards to reset.

Still including brake subassembly 10, brake subassembly 10 is including the bracing piece 1001, dysmorphism frame 1002, seventh spring 1003, scarce gear 1004 and second gear 1005, the equal fore-and-aft symmetry of base 1 inboard is equipped with bracing piece 1001, all slidingtype is equipped with dysmorphism frame 1002 between the bracing piece 1001, slide bar 803 and the cooperation of dysmorphism frame 1002, the equal fore-and-aft symmetry of dysmorphism frame 1002 and base 1 is equipped with seventh spring 1003, seventh spring 1003 all overlaps on bracing piece 1001, the equal rotary type in both sides is equipped with scarce gear 1004 around the dysmorphism frame 1002, all be equipped with second gear 1005 on the wheel 5 transmission shaft, second gear 1005 and the cooperation of scarce gear 1004.

Still including chucking subassembly 11, chucking subassembly 11 is including third guide bar 1101, wedge pole 1102, eighth spring 1103 and pull ring 1104, the equal front and back symmetry of both sides is equipped with third guide bar 1101 around in base 1, all be equipped with wedge pole 1102 between the homonymy third guide bar 1101 outside, wedge pole 1102 all cooperates with dysmorphism frame 1002, all be equipped with four eighth springs 1103 between wedge pole 1102 and the base 1, eighth spring 1103 all overlaps on third guide bar 1101, wedge pole 1102 inboard all is connected with pull ring 1104, pull ring 1104 all with base 1 sliding type connection.

After the pedal 804 is stepped on, the sliding rod 803 moves downwards to contact with the special-shaped frame 1002, so that the special-shaped frame 1002 and the gear lacking rack 1004 are driven to move downwards, the seventh spring 1003 is compressed, the gear lacking rack 1004 clamps the second gear 1005 downwards, the second gear 1005 and the wheel 5 do not rotate any more, the stability of the student desk is increased, and the braking effect is achieved, after the special-shaped frame 1002 moves downwards to contact with the wedge rod 1102, the third guide rod 1101 and the pull ring 1104 move inwards, the eighth spring 1103 is compressed, after the special-shaped frame 1002 successfully passes through the wedge rod 1102 downwards, the third guide rod 1101, the wedge rod 1102 and the pull ring 1104 are driven to move outwards under the effect of the eighth spring 1103, so that the wedge rod 1102 blocks the special-shaped frame 1002, after the student finishes the examination, the pull ring 1104 moves inwards manually, the wedge rod 1102 is driven to disengage from the special-shaped frame 1002 inwards, and the seventh spring 1003 acts, the special-shaped frame 1002 and the missing gear 1004 are driven to move upwards to reset, the missing gear 1004 no longer clamps the second gear 1005, finally the pull ring 1104 is loosened, the wedge-shaped rod 1102, the third guide rod 1101 and the pull ring 1104 reset outwards, and a worker can move the student desk to other places.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a special type student desk of examination which characterized by: comprises the following steps:

the number of the bases (1) is two;

the top of the base (1) is provided with the groove plates (2) in a sliding manner;

the drawer (3) is arranged between the tops of the groove plates (2);

the top of the drawer (3) is provided with a table plate (4);

the wheels (5) are symmetrically and rotatably arranged at the bottom of the base (1);

a placing component (6), wherein the placing component (6) is arranged on the upper side of the base (1) on one side;

the isolation component (7) is arranged on the drawer (3).

2. The examination-dedicated student desk of claim 1, wherein: the placing component (6) comprises:

a placing frame (601), wherein the placing frame (601) is arranged on the upper side of the base (1) on one side;

the buckle (602) is arranged on one side inside the placing frame (601) in a sliding mode;

the first spring (603), the first spring (603) is arranged between the buckle (602) and the placing frame (601); a hook (604), and one side of the trough plate (2) at the other side is provided with the hook (604).

3. An examination-dedicated student desk according to claim 2 wherein: the isolation assembly (7) comprises:

the partition plate (701) is arranged on the inner side of the drawer (3) in a sliding mode, and the partition plate (701) is connected with the table plate (4) in a sliding mode;

the partition plate (701) and two sides of the drawer (3) are uniformly provided with four second springs (702) at intervals;

the two sides of the drawer (3) are symmetrically and slidably provided with wedge blocks (703), and the wedge blocks (703) are matched with the partition plate (701);

a third spring (704), wherein the third spring (704) is arranged between the wedge block (703) and the drawer (3);

the connecting rods (705) are connected between the wedge-shaped blocks (703);

the pull rod (706) is arranged on the wedge block (703) on one side of the pull rod (706), and the pull rod (706) is connected with the drawer (3) in a sliding manner.

4. A student desk dedicated for examination according to claim 3, wherein: still including adjusting part (8), adjusting part (8) including:

the hinge (801) is rotatably connected to the base (1);

the inner sides of the baffles (802) and the hinges (801) are provided with the baffles (802);

the sliding rods (803) are arranged on the inner sides of the groove plates (2) in a sliding manner, and the sliding rods (803) are connected with the base (1) in a sliding manner;

the pedals (804) are arranged on one side of the lower parts of the sliding rods (803), and the pedals (804) are positioned on the inner sides of the baffles (802);

a fourth spring (805), and the fourth spring (805) is arranged between the sliding rod (803) and the base (1);

the top of the rotating rod (806) and the top of the sliding rod (803) are symmetrically and rotatably provided with the rotating rod (806);

the upper side inside the slotted plate (2) is provided with a first guide rod (808);

the clamping blocks (807) are arranged on two sides of the first guide rod (808) in a sliding mode, the clamping blocks (807) are rotatably connected with the rotating rod (806), and the clamping blocks (807) are matched with the groove plate (2);

fifth springs (809) are symmetrically arranged between the clamping blocks (807) and the groove plate (2), and the fifth springs (809) are sleeved on the first guide rod (808);

a special-shaped rod (810) is arranged in the base (1) on one side in a sliding mode, the special-shaped rod (810) is connected with the groove plate (2) and the drawer (3) in a sliding mode, the sliding rod (803) is matched with the special-shaped rod (810), and the special-shaped rod (810) is matched with the pull rod (706).

5. An examination-dedicated student desk according to claim 4 wherein: still including suggestion subassembly (9), suggestion subassembly (9) including:

a second guide rod (901), wherein the second guide rod (901) is arranged in the base (1) on one side;

the rack (902) is arranged on the second guide rod (901) in a sliding mode, and the rack (902) is matched with the groove plate (2);

a sixth spring (903), wherein the sixth spring (903) is arranged between the rack (902) and the right base (1), and the sixth spring (903) is sleeved on the second guide rod (901);

a first rotating shaft (904), wherein the first rotating shaft (904) is rotatably arranged on one side inside the placing frame (601);

a first gear (905) is arranged on one side of the first rotating shaft (904), and the first gear (905) is meshed with the rack (902);

a second rotating shaft (907), wherein the second rotating shaft (907) is rotatably arranged on one side of the top of the placing frame (601);

the bevel gear group (906) is connected between the second rotating shaft (907) and the first rotating shaft (904), the bevel gear group (906) is composed of two bevel gears which are respectively connected to the first rotating shaft (904) and the second rotating shaft (907), and the bevel gears are meshed with each other;

the dial (908), the dial (908) is rotatably arranged on the upper side of the second rotating shaft (907);

the bearing (909), the top of the second rotating shaft (907) is rotatably provided with the bearing (909);

the upper part of the second rotating shaft (907) is connected with a pointer (910), and the pointer (910) is matched with the dial (908).

6. An examination-dedicated student desk according to claim 5 wherein: still including brake subassembly (10), brake subassembly (10) including:

the inner sides of the supporting rods (1001) and the base (1) are symmetrically provided with the supporting rods (1001);

the special-shaped frames (1002) are arranged between the supporting rods (1001) in a sliding mode, and the sliding rods (803) are matched with the special-shaped frames (1002);

seventh springs (1003) are symmetrically arranged between the special-shaped frame (1002) and the base (1), and the seventh springs (1003) are sleeved on the supporting rod (1001);

the two sides of the special-shaped frame (1002) are both rotatably provided with the gear lack (1004);

and the wheels (5) are provided with second gears (1005), and the second gears (1005) are matched with the missing gears (1004).

7. An examination-dedicated student desk according to claim 6 wherein: the device also comprises a clamping component (11), wherein the clamping component (11) is arranged on the inner side of the base (1).

8. An examination-dedicated student desk according to claim 6 wherein: the clamping assembly (11) comprises:

the third guide rods (1101) are symmetrically arranged on two sides in the base (1) in a sliding manner; the wedge-shaped rods (1102) are arranged between the outer sides of the third guide rods (1101) on the same side, and the wedge-shaped rods (1102) are matched with the special-shaped frame (1002);

the four eighth springs (1103) are arranged between the wedge-shaped rod (1102) and the base (1), and the eighth springs (1103) are sleeved on the third guide rod (1101);

the inner sides of the wedge-shaped rods (1102) are connected with pull rings (1104), and the pull rings (1104) are connected with the base (1) in a sliding mode.