CN112944161B

CN112944161B - Law specialty is with case teaching display device

Info

Publication number: CN112944161B
Application number: CN202110180883.9A
Authority: CN
Inventors: 谈世纪
Original assignee: Sichuan Normal University
Current assignee: Sichuan Normal University
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-10-15
Anticipated expiration: 2041-02-07
Also published as: CN112944161A

Abstract

The invention discloses a law major case teaching display device which comprises a base, wherein four first universal wheels which are arranged in a pairwise symmetry mode are fixedly installed at the bottom of the base, two first bearing seats are fixedly installed at the top of the base, rotating shafts are rotatably installed at the tops of the two first bearing seats, and an installation plate is arranged above the base. The height adjusting device is reasonable in design and good in practicability, the height positions of the mounting plate and the display screen can be adjusted conveniently, the height positions of the mounting plate and the display screen can be reinforced and supported, the phenomenon that the gravity center of the whole device is shifted or changed to topple over after the height of the mounting plate and the display screen is adjusted is avoided, the stability of the whole device is improved, the cover plate can be opened automatically, the two anti-skidding pressing plates can be in close contact with the ground when the height of the display screen is adjusted, the whole device can be stably fixed on the ground, and the whole device cannot shift during teaching.

Description

Law specialty is with case teaching display device

Technical Field

The invention relates to the technical field of teaching display equipment, in particular to a case teaching display device for law major.

Background

The core of the law, also called law and law science, is the research on order and justice, namely the order and justice, and case teaching in the law classroom teaching is one of the important components, and people, things and objects involved in the law case teaching have special professional characteristics, so that teaching display equipment is usually used in the law case teaching process.

Through retrieval, the authorized bulletin number is CN210691657U, which discloses a case teaching and showing device for the legal major, comprising a base, a hydraulic pump, a showing frame, a display screen 5 and a controller, wherein the hydraulic pump is arranged in the middle of the top of the base, the hydraulic pump can drive a hydraulic rod to lift through the hydraulic pump, so as to drive the showing frame and the display screen 5 to lift, the height of the display screen 5 and the showing frame can be adjusted, the controller and the display screen 5 are arranged, a WIFI module is arranged in the controller, a user can transmit teaching information to the controller through an external device through the WIFI module and transmit the teaching information to the display screen 5 through the controller for displaying, the teaching information can be transmitted in real time, the position of the display screen 5 can be adjusted in a sliding manner through arranging the display screen 5 on a sliding rail in the mounting frame through a pulley, and multi-directional showing teaching is facilitated, further improving the practicability, however, in the prior art, although the display frame and the display screen 5 can be adjusted in a lifting manner during the use of the case teaching display equipment for law specialty, after the heights of the display frame and the display screen 5 are adjusted, the center of gravity of the whole equipment can be changed or shifted, so that the equipment can topple over due to unstable center of gravity, which affects the normal use of the equipment, and the higher the adjustment of the display frame and the display screen 5 is, the more the whole equipment can not be stably placed on the ground, the more the equipment can topple over easily, and the case teaching display equipment for law specialty can not be stably fixed on the ground when in use, is easy to move, brings inconvenience to the case teaching work for law, and easily causes resource waste if the operator forgets to close the teaching equipment due to negligence, therefore, a case teaching and showing device for law major is provided for solving the problems.

Disclosure of Invention

Technical problem to be solved

The invention provides a case teaching display device for the law major, aiming at overcoming the defects of the prior art, and solving the problems that the existing case teaching display device for the law major can change or shift the gravity center of the whole device after adjusting the heights of a display frame and a display screen although the display frame and the display screen can be adjusted in the using process, so that the device can topple over due to unstable gravity center, the normal use of the device is influenced, the higher the adjustment of the display frame and the display screen is, the more the whole device can not be stably placed on the ground, the more the device is prone to topple over, and the case teaching display device for the law major can not stably fix the whole device on the ground and is prone to movement when in use, so that inconvenience is brought to case teaching work.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a law teaching professional case teaching display device comprises a base, wherein four first universal wheels are fixedly arranged at the bottom of the base in a pairwise symmetrical mode, two first bearing seats are fixedly arranged at the top of the base, rotating shafts are rotatably arranged at the tops of the two first bearing seats, a mounting plate is arranged above the base, a mounting groove is formed in the front side of the mounting plate, a display screen is fixedly arranged in the mounting groove, two stand columns are fixedly arranged at the bottom of the mounting plate, first thread grooves are formed in the bottoms of the two stand columns, thread columns are arranged in the two first thread grooves in a threaded mode, the bottoms of the two thread columns extend out of the corresponding first thread grooves respectively, the bottoms of the two thread columns are fixedly connected with the top ends of the corresponding rotating shafts respectively, first belt pulleys are fixedly sleeved on the two rotating shafts, and the same first belt is wound on the two first belt pulleys, the top of base is provided with the vertical axis, the fixed cover in top of vertical axis is equipped with the second belt pulley, fixed cover is equipped with the third belt pulley in one of them pivot in two pivots, around being equipped with same second belt pulley on third belt pulley and the second belt pulley, fixed cover is equipped with first straight gear and first bevel gear on the vertical axis, first bevel gear is located the below of first straight gear, the top fixed mounting of base has two positioning seats, two positioning seat symmetries set up the both sides at the vertical axis, equal rotation installs the cross axle on two positioning seats, the equal fixed mounting of one end that two cross axles are close to each other has the second bevel gear, two second bevel gears all mesh with first bevel gear mutually.

Preferably, worms are fixedly installed at the ends, far away from each other, of the two transverse shafts, two installation holes are formed in the top of the base, threaded sleeves are rotatably installed in the two installation holes, the two ends of each threaded sleeve extend out of the installation hole, first lead screws are installed in the two threaded sleeves in a threaded manner, the top ends of the two first lead screws extend out of the corresponding threaded sleeves, worm wheels located above the base are fixedly sleeved on the two threaded sleeves, the two worms are respectively meshed with the corresponding worm wheels, first sliding grooves are formed in the bottom ends of the two first lead screws, sliding rods are installed in the two first sliding grooves in a sliding manner, the bottom ends of the two sliding rods respectively extend out of the corresponding threaded sleeves, anti-skidding pressing plates are fixedly installed at the bottom ends of the two sliding rods, springs are fixedly installed at the top ends of the two sliding rods, and the top ends of the two springs are respectively fixedly connected with the inner walls of the tops of the corresponding first sliding grooves, the top fixed mounting of base has the motor, and the output shaft end fixed mounting of motor has the second straight-toothed gear, and the second straight-toothed gear meshes with first straight-toothed gear mutually.

Preferably, the inner walls of the two sides of the first sliding groove are provided with limiting grooves, the two sides of the sliding rod are fixedly provided with limiting rods, and the limiting rods are slidably arranged in the corresponding limiting grooves.

Preferably, a second chute is formed in the rear side of the base, a sliding plate is slidably mounted in the second chute, one side of the sliding plate extends out of the second chute, a second thread groove is formed in one side of the sliding plate, which is located in the second chute, a second lead screw is mounted in the second thread groove in a threaded manner, one end of the second lead screw extends out of the second thread groove, a round hole is formed in the inner wall of the top of the second chute, the bottom end of the vertical shaft penetrates through the round hole and is fixedly provided with a third bevel gear, a fourth bevel gear located out of the second thread groove is fixedly sleeved on the second lead screw and is meshed with the third bevel gear, a first hinge seat located out of the second chute is fixedly mounted at the top of the sliding plate, a support rod is hinged to the top of the first hinge seat, the support rod is arranged in an inclined manner, a third chute is formed in the top end of the support rod, a connecting rod is slidably mounted in the third chute, and the top end of the connecting rod extends out of the third chute, the rear side fixed mounting of mounting panel has the articulated seat of second, and the top of connecting rod is articulated mutually with one side of the articulated seat of second.

Preferably, the top of the base is fixedly provided with an outer cover, and the two first bearing blocks, the two rotating shafts, the vertical shaft, the first straight gear, the two positioning seats, the two transverse shafts, the motor and the second straight gear are all positioned in the outer cover.

Preferably, the bottom fixed mounting of slide has two second universal wheels, and the equal fixed mounting in top of two non-slip pressure plates has the guide bar, and two guiding holes have been seted up at the top of base, and the top of two guide bars runs through corresponding guiding hole respectively.

Preferably, one side of mounting panel is rotated and is installed the apron, and the apron is with the notch looks adaptation of mounting groove, and fixed mounting has two curved springs on the bottom inner wall of mounting groove, and the one end that the mounting panel was kept away from to two curved springs all with one side fixed connection of apron, and one side fixed mounting that the mounting panel was kept away from to the apron has the diaphragm, two haulage ropes of bottom fixedly connected with of diaphragm, and one side fixed mounting of first articulated seat has two semicircle rings, and the one end that the diaphragm was kept away from to two haulage ropes respectively with corresponding semicircle ring fixed connection.

Preferably, the vertical shaft is fixedly sleeved with a first bearing, and an outer ring of the first bearing is fixedly connected with the inner wall of the circular hole.

Preferably, a second bearing seat is fixedly mounted on the inner wall of one side, away from the notch of the second sliding chute, and one end, located outside the second threaded groove, of the second screw rod is rotatably mounted on the second bearing seat.

Preferably, the bottom of slide nested has a plurality of balls, and a plurality of balls are equidistant array and arrange, and a plurality of balls all with the bottom inner wall rolling contact of second spout.

Preferably, the inner walls of the two sides of the second sliding groove are provided with guide grooves, the two sides of the sliding plate are fixedly provided with guide blocks, and the two guide blocks are slidably mounted in the corresponding guide grooves respectively.

Furthermore, the motor can rotate forward and backward, and the control switch can control the starting and stopping and the forward and backward rotation of the motor.

Furthermore, the device further comprises a controller, a first decibel detector and a second decibel detector, wherein the controller can control the operation of the motor and the opening and closing of the display screen, the first decibel detector is arranged at a platform of a classroom and can detect the decibel value of a teacher in class at present, and the second decibel detector is arranged near a student seat of the classroom.

(III) advantageous effects

The invention provides a law specialty case teaching display device. The method has the following beneficial effects:

(1) this legal science specialty is with case teaching display device, through setting up first universal wheel and second universal wheel, the teaching equipment of being convenient for removes, through starter motor corotation, the motor drives the rotation of second straight-teeth gear, the second straight-teeth gear drives first straight-teeth gear, the vertical axis, the second belt pulley, first bevel gear and third bevel gear rotate, at the second belt pulley, under the drive effect of third belt pulley and second belt, and under the drive effect of two first belt pulleys and first belt, make two stands drive mounting panel and display screen and rise.

(2) This law specialty is with case teaching display device, through in the high position to mounting panel and display screen carries out the accommodation process, two non-slip clamp plate can with the inseparable contact in ground, can play the effect of wholly carrying out the fixing to this equipment, and the high position of display screen adjusts more highly moreover, the compression deformation that two springs received is bigger, the vertical decurrent reaction force that two non-slip clamp plate received is big more, make this equipment wholly can be more firm fix subaerial, the holistic stability of this equipment has further been improved.

(3) This a law specialty is with case teaching display device, through when mounting panel and display screen descend to the lowest position, the slide slides and resumes the normal position in the second spout, under the spring action that two bent springs produced, make apron and diaphragm use its articulated department to upwards rotate as the center gradually, make the apron rotate to laminating mutually with the mounting panel, utilize the apron to go out to shelter from the notch of mounting groove, can seal the display screen in the mounting groove, thereby can carry out effectual protection to the display screen, avoid the display screen to expose for a long time and fall the ash or receive the collision and damage in the air.

Drawings

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

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is a schematic cross-sectional side view of the present invention;

fig. 6 is an enlarged schematic view of a portion C in fig. 5.

In the figure: 1. a base; 2. a first universal wheel; 3. a first bearing housing; 4. mounting a plate; 5. a display screen; 6. a column; 7. a first thread groove; 8. a threaded post; 9. a rotating shaft; 10. a first pulley; 11. a first belt; 12. a vertical axis; 13. a second pulley; 14. a third belt pulley; 15. a second belt; 16. a first straight gear; 17. a first bevel gear; 18. positioning seats; 19. a horizontal axis; 20. a second bevel gear; 21. a worm; 22. a threaded sleeve; 23. a first lead screw; 24. a worm gear; 25. a first chute; 26. a slide bar; 27. an anti-skid pressure plate; 28. a spring; 29. a motor; 30. a second spur gear; 31. a second chute; 32. a slide plate; 33. a second thread groove; 34. a second lead screw; 35. a third bevel gear; 36. a fourth bevel gear; 37. a first hinge mount; 38. a support bar; 39. a third chute; 40. a connecting rod; 41. a second hinge mount; 42. a housing; 43. a second universal wheel; 44. a guide bar; 45. a cover plate; 46. bending a spring; 47. a transverse plate; 48. a hauling rope; 49. a semicircular ring.

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.

As shown in fig. 1 to 6, the present invention provides a technical solution: a law major case teaching display device comprises a base 1, four first universal wheels 2 which are arranged symmetrically in pairs are fixedly installed at the bottom of the base 1, two first bearing seats 3 are fixedly installed at the top of the base 1, rotating shafts 9 are respectively installed at the tops of the two first bearing seats 3 in a rotating mode, an installation plate 4 is arranged above the base 1, an installation groove is formed in the front side of the installation plate 4, a display screen 55 is fixedly installed in the installation groove, two upright posts 6 are fixedly installed at the bottom of the installation plate 4, first thread grooves 7 are respectively formed in the bottom ends of the two upright posts 6, thread posts 8 are respectively installed in the two first thread grooves 7 in a threaded mode, the bottom ends of the two thread posts 8 respectively extend out of the corresponding first thread grooves 7, the bottom ends of the two thread posts 8 are respectively fixedly connected with the top ends of the corresponding rotating shafts 9, and first belt pulleys 10 are respectively fixedly sleeved on the two rotating shafts 9, the two first belt pulleys 10 are wound with the same first belt 11, the top of the base 1 is provided with a vertical shaft 12, the top end of the vertical shaft 12 is fixedly sleeved with a second belt pulley 13, one of the two rotating shafts 9 is fixedly sleeved with a third belt pulley 14, the third belt pulley 14 and the second belt pulley 13 are wound with the same second belt 15, the vertical shaft 12 is fixedly sleeved with a first straight gear 16 and a first bevel gear 17, the first bevel gear 17 is positioned below the first straight gear 16, the top of the base 1 is fixedly provided with two positioning seats 18, the two positioning seats 18 are symmetrically arranged on two sides of the vertical shaft 12, the two positioning seats 18 are rotatably provided with cross shafts 19, one ends of the two cross shafts 19, which are close to each other, are fixedly provided with second bevel gears 20, and the two second bevel gears 20 are engaged with the first bevel gears 17.

In the embodiment, two ends of the two transverse shafts 19, which are far away from each other, are fixedly provided with worms 21, the top of the base 1 is provided with two mounting holes, threaded sleeves 22 are rotatably mounted in the two mounting holes, two ends of each threaded sleeve 22 extend out of the mounting hole, first lead screws 23 are threadedly mounted in the two threaded sleeves 22, top ends of the two first lead screws 23 extend out of the corresponding threaded sleeves 22, worm wheels 24 positioned above the base 1 are fixedly sleeved on the two threaded sleeves 22, the two worms 21 are respectively meshed with the corresponding worm wheels 24, first chutes 25 are respectively formed in bottom ends of the two first lead screws 23, slide bars 26 are slidably mounted in the two first chutes 25, bottom ends of the two slide bars 26 respectively extend out of the corresponding threaded sleeves 22, anti-skid pressing plates 27 are fixedly mounted at bottom ends of the two slide bars 26, springs 28 are fixedly mounted at top ends of the two slide bars 26, the top ends of the two springs 28 are respectively fixedly connected with the inner wall of the top of the corresponding first sliding chute 25, the top of the base 1 is fixedly provided with a motor 29, the output shaft end of the motor 29 is fixedly provided with a second straight gear 30, and the second straight gear 30 is meshed with the first straight gear 16.

In this embodiment, the inner walls of the two sides of the first sliding groove 25 are both provided with a limiting groove, the two sides of the sliding rod 26 are both fixedly provided with a limiting rod, and the limiting rods are slidably mounted in the corresponding limiting grooves.

In this embodiment, a second sliding groove 31 is formed in the rear side of the base 1, a sliding plate 32 is slidably mounted in the second sliding groove 31, one side of the sliding plate 32 extends out of the second sliding groove 31, a second threaded groove 33 is formed in one side of the sliding plate 32 located in the second sliding groove 31, a second lead screw 34 is mounted in the second threaded groove 33 through threads, one end of the second lead screw 34 extends out of the second threaded groove 33, a circular hole is formed in the inner wall of the top of the second sliding groove 31, a third bevel gear 35 is fixedly mounted at the bottom end of the vertical shaft 12 through the circular hole, a fourth bevel gear 36 located outside the second threaded groove 33 is fixedly sleeved on the second lead screw 34, the fourth bevel gear 36 is engaged with the third bevel gear 35, a first hinge seat 37 located outside the second sliding groove 31 is fixedly mounted at the top of the sliding plate 32, a support rod 38 is hinged to the top of the first hinge seat 37, the support rod 38 is disposed in an inclined manner, a third sliding groove 39 is formed at the top end of the support rod 38, a connecting rod 40 is slidably mounted in the third sliding chute 39, the top end of the connecting rod 40 extends out of the third sliding chute 39, a second hinge seat 41 is fixedly mounted at the rear side of the mounting plate 4, and the top end of the connecting rod 40 is hinged to one side of the second hinge seat 41.

In this embodiment, the top of the base 1 is fixedly provided with an outer cover 42, and the two first bearing blocks 3, the two rotating shafts 9, the vertical shaft 12, the first spur gear 16, the two positioning seats 18, the two horizontal shafts 19, the motor 29, and the second spur gear 30 are all located in the outer cover 42.

In this embodiment, two second universal wheels 43 are fixedly mounted at the bottom of the sliding plate 32, guide rods 44 are fixedly mounted at the tops of the two anti-skidding pressing plates 27, two guide holes are formed in the top of the base 1, and the top ends of the two guide rods 44 penetrate through the corresponding guide holes respectively.

In this embodiment, one side of mounting panel 4 is rotated and is installed apron 45, the notch looks adaptation of apron 45 and mounting groove, fixed mounting has two curved springs 46 on the bottom inner wall of mounting groove, the one end that mounting panel 4 was kept away from to two curved springs 46 all with one side fixed connection of apron 45, one side fixed mounting that mounting panel 4 was kept away from to apron 45 has diaphragm 47, two haulage ropes 48 of bottom fixedly connected with of diaphragm 47, one side fixed mounting of first articulated seat 37 has two semicircle rings 49, the one end that diaphragm 47 was kept away from to two haulage ropes 48 respectively with corresponding semicircle ring 49 fixed connection.

In this embodiment, the vertical shaft 12 is fixedly sleeved with a first bearing, and an outer ring of the first bearing is fixedly connected with an inner wall of the circular hole.

In this embodiment, a second bearing seat is fixedly installed on an inner wall of one side of the second sliding chute 31 away from the notch of the second sliding chute 31, and one end of the second lead screw 34 located outside the second thread groove 33 is rotatably installed on the second bearing seat.

In this embodiment, the bottom of slide 32 is nested and is had a plurality of balls, and a plurality of balls are equidistant array and arrange, and a plurality of balls all with the bottom inner wall rolling contact of second spout 31.

In this embodiment, the inner walls of the two sides of the second chute 31 are provided with guide grooves, the two sides of the sliding plate 32 are fixedly provided with guide blocks, and the two guide blocks are slidably mounted in the corresponding guide grooves respectively.

Further, the motor 29 is a motor capable of rotating forward and backward, and the control switch can control the start and stop and the forward and backward rotation of the motor 29.

Further, the device comprises a controller, a first decibel detector and a second decibel detector, wherein the controller can control the operation of the motor 29 and the opening and closing of the display screen 55, the first decibel detector is arranged at a platform of a classroom and can detect the decibel value of a teacher in class at present, and the second decibel detector is arranged near a student seat of the classroom.

The working principle is as follows: when the height position of the display screen 55 needs to be adjusted, the motor 29 is started to rotate positively, the motor 29 drives the second spur gear 30 to rotate, the second spur gear 30 drives the first spur gear 16, the vertical shaft 12, the second belt pulley 13, the first bevel gear 17 and the third bevel gear 35 to rotate, under the transmission action of the second belt pulley 13, the third belt pulley 14 and the second belt 15, and under the transmission action of the two first belt pulleys 10 and the first belt 11, the two threaded columns 8 synchronously rotate in the same direction, so that the two upright columns 6 drive the mounting plate 4 and the display screen 55 to be lifted, in the lifting process of the display screen 55, the fourth bevel gear 36 is driven to rotate by the third bevel gear 35, so that the fourth bevel gear 36 drives the second lead screw 34 to rotate, under the guiding action of the two guide blocks and the two guide grooves, the slide plate 32 slides towards the outside of the second chute 31, the slide plate 32 drives the first hinge seat 37 and the support rod 38 to move, the slide plate 32 drives a plurality of balls to roll on the inner wall of the bottom of the second chute 31, the slide plate 32 drives two second universal wheels 43 to roll on the ground, meanwhile, the mounting plate 4 drives the second hinge seat 41 and the connecting rod 40 to move upwards, the support rod 38 and the connecting rod 40 rotate at the hinge positions respectively, the connecting rod 40 slides towards the outside of the third chute 39, after the height positions of the mounting plate 4 and the display screen 55 are properly adjusted, the motor 29 is stopped to work, so that the height positions of the mounting plate 4 and the display screen 55 are conveniently adjusted, after the height positions of the mounting plate 4 and the display screen 55 are adjusted, the stand column 6 cannot synchronously rotate along with the threaded column 8 by using the support rod 38 and the connecting rod 40, and meanwhile, the phenomenon that the gravity center of the whole equipment deviates or changes and topples over caused by the height adjustment of the mounting plate 4 and the display screen 55 is avoided, the stability of the whole device is improved, in the process of adjusting the height positions of the mounting plate 4 and the display screen 55, as the mounting plate 4 is lifted upwards, the sliding plate 32 slowly slides towards the outside of the second sliding groove 31, the first hinge seat 37 drives the two pulling ropes 48 to move, and the two pulling ropes 48 pull the transverse plate 47 and the cover plate 45 to rotate around the hinge joint, the cover plate 45 is opened, so that the display screen 55 is exposed, in the process of adjusting the height positions of the mounting plate 4 and the display screen 55, the two second bevel gears 20 are driven to rotate by the first bevel gear 17, the two second bevel gears 20 drive the corresponding transverse shaft 19 and the corresponding worm 21 to rotate, the two worm 21 drive the corresponding worm wheel 24 and the corresponding threaded sleeve 22 to rotate, so that the two first screw rods 23 drive the corresponding sliding rods 26, the anti-skid pressing plate 27 and the guide rod 44 to slowly move downwards, when the two anti-skid press plates 27 are in contact with the ground, the positions of the two anti-skid press plates 27 are not changed any more, and the two anti-skid press plates 27 move downwards along with the two first screw rods 23, so that the two slide rods 26 slide into the corresponding first slide grooves 25 respectively, the two springs 28 are compressed and deformed to generate elastic force, the two slide rods 26 drive the corresponding limit rods to slide in the corresponding limit grooves, the two anti-skid press plates 27 are subjected to vertical downward reaction force, so that the two anti-skid press plates 27 can be in close contact with the ground, the whole device can be fixed on the ground stably, the whole device cannot deviate when the display screen 55 is used for teaching, and the higher the height position of the display screen 55 is, the greater the compression deformation of the two springs 28 is, and the greater the vertical downward reaction force of the two anti-skid press plates 27 is, make this equipment whole can be more firm fix subaerial, further improved the holistic stability of this equipment. Similarly, through starter motor 29 reversal operation, mounting panel 4 and display screen 55 can descend, bracing piece 38 and connecting rod 40 rotate with its articulated department respectively, connecting rod 40 slides to the direction in the third spout 39, the slow rebound of antiskid clamp plate 27, just removed the holistic fixed of this equipment, can promote this equipment integral movement to other positions, and when mounting panel 4 and display screen 55 descend to the lower position, under the elastic force effect that bent spring 46 produced, make apron 45 laminate with mounting panel 4 mutually, apron 45 can shelter from the notch play of mounting groove, avoid display screen 55 to expose for a long time and fall the ash in the air or receive the collision and damage.

In addition, a first decibel detector is arranged at a platform of a classroom and can detect the decibel value of a teacher in class currently, a second decibel detector is arranged near a student seat of the classroom, the decibel number detected by the first decibel detector is decibel one, the decibel number detected by the second decibel detector is decibel two, the decibel number of the teacher at the platform during class is counted as a class teaching decibel, the decibel number of the student at the seat before class is counted as a class teaching decibel, the class teaching decibel and the class teaching decibel are both counted decibel value ranges, a controller can compare the decibel one with the class teaching decibel at any moment and compare the decibel two with the class teaching decibel at any moment, if the decibel one is continuously in the class teaching decibel range within 3 minutes and the decibel two is continuously smaller than the previous decibel within the same 3 minutes, and the classroom controller recognizes that a display screen 5 is in an open state, the class teaching stage is determined, the controller does not make any actual operation command;

if the decibel one is continuously smaller than the class-giving decibel within 10 minutes, the decibel two is continuously within the range of the class-front decibel, and the display screen 5 is in the closed state, the current classroom is judged to be in the class-front state, the controller automatically turns on a switch of the display screen 5, and controls the motor to lift the display screen 5, so that the teaching equipment can be automatically turned on in advance, manual operation of teachers or operators is not needed, and the time for operating the teaching equipment in class is saved;

if the first decibel is continuously smaller than the lecture decibel, the second decibel is continuously smaller than the pre-class decibel within 10 minutes, and the display screen 5 is in the open state, the classroom is determined to be in the non-lesson state, and the operator forgets to close the display screen 5, then the controller controls the display screen 5 to be closed, and simultaneously controls the motor to drop the display screen 5. Decibel detector one, two and controller, can prevent that operating personnel from forgetting when closing the device, display screen 5 is in the on-state all the time, cause the waste of the energy, and need not operating personnel initiative operation, also can be in the automatic shutdown teaching equipment when unmanned state in the classroom after class, simultaneously, can also make statistics of many teachers' decibel of giving lessons and input controller, and also can real-time update in the controller and teaching activity table on the same day, can adjust the decibel of giving lessons, the decibel before class for the standard by the activity table.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a law specialty is with case teaching display device, includes base (1), its characterized in that: the bottom of the base (1) is fixedly provided with four first universal wheels (2) which are arranged in pairwise symmetry, the top of the base (1) is fixedly provided with two first bearing seats (3), the tops of the two first bearing seats (3) are respectively rotatably provided with a rotating shaft (9), a mounting plate (4) is arranged above the base (1), a mounting groove is arranged at the front side of the mounting plate (4), a display screen (5) is fixedly arranged in the mounting groove, the bottom of the mounting plate (4) is fixedly provided with two upright posts (6), the bottom ends of the two upright posts (6) are respectively provided with a first thread groove (7), thread posts (8) are respectively arranged in the two first thread grooves (7) in a threaded manner, the bottom ends of the two thread posts (8) respectively extend out of the corresponding first thread grooves (7), and the bottom ends of the two thread posts (8) are respectively fixedly connected with the top ends of the corresponding rotating shafts (9), the two rotating shafts (9) are fixedly sleeved with first belt pulleys (10), the same first belt (11) is wound on the two first belt pulleys (10), the top of the base (1) is provided with a vertical shaft (12), the top end of the vertical shaft (12) is fixedly sleeved with a second belt pulley (13), one rotating shaft (9) of the two rotating shafts (9) is fixedly sleeved with a third belt pulley (14), the third belt pulley (14) and the second belt pulley (13) are wound with the same second belt (15), the vertical shaft (12) is fixedly sleeved with a first straight gear (16) and a first bevel gear (17), the first bevel gear (17) is positioned below the first straight gear (16), the top of the base (1) is fixedly provided with two positioning seats (18), the two positioning seats (18) are symmetrically arranged on two sides of the vertical shaft (12), the two positioning seats (18) are both rotatably provided with a transverse shaft (19), one ends of the two transverse shafts (19) which are close to each other are fixedly provided with second bevel gears (20), and the two second bevel gears (20) are meshed with the first bevel gear (17);

the two transverse shafts (19) are fixedly provided with worms (21) at the ends far away from each other, the top of the base (1) is provided with two mounting holes, threaded sleeves (22) are rotatably arranged in the two mounting holes, the two ends of each threaded sleeve (22) extend out of the mounting holes, first screw rods (23) are arranged in the two threaded sleeves (22) in a threaded manner, the top ends of the two first screw rods (23) extend out of the corresponding threaded sleeves (22), worm wheels (24) positioned above the base (1) are fixedly sleeved on the two threaded sleeves (22), the two worms (21) are respectively meshed with the corresponding worm wheels (24), first chutes (25) are arranged in the bottom ends of the two first screw rods (23), slide bars (26) are arranged in the two first chutes (25) in a sliding manner, the bottom ends of the two slide bars (26) extend out of the corresponding threaded sleeves (22) respectively, the bottom ends of the two sliding rods (26) are fixedly provided with anti-skidding pressing plates (27), the top ends of the two sliding rods (26) are fixedly provided with springs (28), the top ends of the two springs (28) are fixedly connected with the inner wall of the top of the corresponding first sliding groove (25), the top of the base (1) is fixedly provided with a motor (29), the output shaft end of the motor (29) is fixedly provided with a second straight gear (30), and the second straight gear (30) is meshed with the first straight gear (16);

a second sliding groove (31) is formed in the rear side of the base (1), a sliding plate (32) is arranged in the second sliding groove (31) in a sliding mode, one side of the sliding plate (32) extends out of the second sliding groove (31), a second thread groove (33) is formed in one side, located in the second sliding groove (31), of the sliding plate (32), a second lead screw (34) is installed in the second thread groove (33) in an internal thread mode, one end of the second lead screw (34) extends out of the second thread groove (33), a round hole is formed in the inner wall of the top of the second sliding groove (31), a third bevel gear (35) penetrates through the round hole in the bottom end of the vertical shaft (12) and is fixedly installed on the bottom end of the vertical shaft, a fourth bevel gear (36) located out of the second thread groove (33) is fixedly installed on the second lead screw (34), the fourth bevel gear (36) is meshed with the third bevel gear (35), a first hinged seat (37) located out of the second sliding groove (31) is fixedly installed on the top of the sliding plate (32), the top of first articulated seat (37) articulates there is bracing piece (38), bracing piece (38) set up for the slope, third spout (39) have been seted up on the top of bracing piece (38), slidable mounting has connecting rod (40) in third spout (39), outside the top of connecting rod (40) extended to third spout (39), the rear side fixed mounting of mounting panel (4) had articulated seat of second (41), and the top of connecting rod (40) was articulated mutually with one side of the articulated seat of second (41).

2. The legal professional case teaching display device of claim 1, wherein: limiting grooves are formed in the inner walls of the two sides of the first sliding groove (25), limiting rods are fixedly mounted on the two sides of the sliding rod (26), and the limiting rods are slidably mounted in the corresponding limiting grooves.

3. The legal professional case teaching display device of claim 1, wherein: the top of the base (1) is fixedly provided with an outer cover (42), and the two first bearing seats (3), the two rotating shafts (9), the vertical shaft (12), the first straight gear (16), the two positioning seats (18), the two transverse shafts (19), the motor (29) and the second straight gear (30) are all positioned in the outer cover (42).

4. The legal professional case teaching display device of claim 1, wherein: the bottom fixed mounting of slide (32) has two second universal wheels (43), and the equal fixed mounting in top of two non-slip clamp plate (27) has guide bar (44), and two guiding holes have been seted up at the top of base (1), and corresponding guiding hole is run through respectively on the top of two guide bar (44).

5. The legal professional case teaching display device of claim 1, wherein: one side of mounting panel (4) is rotated and is installed apron (45), the notch looks adaptation of apron (45) and mounting groove, fixed mounting has two curved spring (46) on the bottom inner wall of mounting groove, the one end that mounting panel (4) were kept away from in two curved spring (46) all with one side fixed connection of apron (45), one side fixed mounting that mounting panel (4) were kept away from in apron (45) has diaphragm (47), two haulage rope (48) of bottom fixedly connected with of diaphragm (47), one side fixed mounting of first articulated seat (37) has two semicircle ring (49), the one end that diaphragm (47) were kept away from in two haulage rope (48) respectively with corresponding semicircle ring (49) fixed connection.

6. The legal professional case teaching display device of claim 1, wherein: a first bearing is fixedly sleeved on the vertical shaft (12), and the outer ring of the first bearing is fixedly connected with the inner wall of the round hole.

7. The legal professional case teaching display device of claim 1, wherein: fixed mounting has the second bearing seat on second spout (31) keeps away from one side inner wall of second spout (31) notch, and second lead screw (34) are located the outer one end rotation of second thread groove (33) and install on the second bearing seat, the guide way has all been seted up on the both sides inner wall of second spout (31), and the equal fixed mounting in both sides of slide (32) has the guide block, and two guide blocks are slidable mounting respectively in corresponding guide way, the bottom nestification of slide (32) has a plurality of balls, and a plurality of balls are equidistant array and arrange, and a plurality of balls all with the bottom inner wall rolling contact of second spout (31).