CN110675662A

CN110675662A - Digital media teaching presentation device

Info

Publication number: CN110675662A
Application number: CN201910978615.4A
Authority: CN
Inventors: 汪凯
Original assignee: Xuchang University
Current assignee: Xuchang University
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-01-10

Abstract

The invention discloses a digital media teaching demonstration device, and mainly relates to the field of digital media teaching. Including hoisting frame, projecting apparatus, the bottom at hoisting frame is installed to the projecting apparatus, the projecting apparatus includes and hoists a articulated casing, be equipped with angle adjusting device between casing and the hoisting frame, the middle part of the front end of casing is equipped with the camera lens, the downside of camera lens is equipped with first motor, be equipped with the baffle that suits with the camera lens in the pivot of first motor, all install ventilation exhaust apparatus on the wall of the left and right sides of casing, ventilation exhaust apparatus is including inlaying the air discharge fan on the casing, one side that the casing was kept away from to the air discharge fan covers there is filter equipment, be equipped with controlling means on the casing, controlling means includes microcontroller, wireless control module, relay. The invention has the beneficial effects that: can guarantee the projecting apparatus heat dissipation, can prevent filths such as dust from getting into inside the projecting apparatus, can protect the camera lens, the projection angle of being convenient for is adjusted.

Description

Digital media teaching presentation device

Technical Field

The invention relates to the field of digital media teaching, in particular to a digital media teaching demonstration device.

Background

The projector is the most common digital media teaching device, usually a hoisting frame is adopted to fix the projector in a classroom, because the projector generates a large amount of heat during operation, in order to ensure the service life, the left side and the right side of the projector are provided with exhaust holes, however, when the projector is exposed to the outside for a long time, dirt such as dust in the air often enters the projector through the exhaust hole, and is accumulated on the components in the projector, which seriously affects the heat dissipation of the projector and reduces the service life of the projector, in addition, the fixed position of the projector is higher, when the tool is not used, it is difficult to cover the cover of the projector lens, and when the lens is full of dust, the projection quality is damaged, and at the same time, when the projection angle of the projector needs to be adjusted, the projector also needs to stand on a ladder or a table for adjustment, and the use is very inconvenient.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a digital media teaching demonstration device which can ensure the heat dissipation of a projector, prevent dirt such as dust and the like from entering the projector, protect a lens and facilitate the adjustment of a projection angle.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a digital media teaching demonstration device comprises a hoisting frame and a projector, wherein the projector is arranged at the bottom of the hoisting frame, the projector comprises a shell hinged with the hoisting frame, an angle adjusting device is arranged between the shell and the hoisting frame, a lens is arranged in the middle of the front end of the shell, a first motor is arranged on the lower side of the lens, a baffle matched with the lens is arranged on a rotating shaft of the first motor, ventilation and exhaust devices are respectively arranged on the left side wall and the right side wall of the shell, each ventilation and exhaust device comprises an exhaust fan embedded on the shell, a filtering device covers one side of the exhaust fan far away from the shell, a control device is arranged on the shell, the control device comprises a microcontroller, a wireless control module and a relay, the wireless control module and the relay are in signal connection with the microcontroller, and the two exhaust fans are connected in parallel, and one of the exhaust fans is connected with the normally open contact of the relay, and the other exhaust fan is connected with the normally closed contact of the relay.

The shell is provided with a mounting rack matched with the first motor, and a gap is reserved between the mounting rack and the lens.

The angle adjusting device comprises an adjusting rod, one end of the adjusting rod is hinged to the rear portion of the top end of the shell, the other end of the adjusting rod is hinged to a sliding block, a sliding groove matched with the sliding block is vertically formed in the hoisting frame, a lead screw is arranged in the sliding groove, a control motor is arranged at the top end of the lead screw, a nut matched with the lead screw is arranged on the sliding block, and the control motor is in signal connection with the microcontroller.

An elastic pad is pasted on one side of the baffle plate close to the lens.

The edge of the lens is provided with at least two rubber scrapers which are matched with the baffle.

A rapping device is arranged between the exhaust fan and the filtering device and comprises a driving motor and an eccentric column, the eccentric column is installed on a rotating shaft of the driving motor, and a plurality of elastic rapping columns used for striking the filtering device are arranged on the outer wall of the eccentric column.

Compared with the prior art, the invention has the beneficial effects that:

the angle adjusting device is used for adjusting the included angle between the shell and the hoisting frame, can adjust the projection angle of the projector, the baffle is used for shielding the lens, the first motor rotates to drive the baffle to rotate around the axial lead of the rotating shaft of the first motor, can open and close the lens, reduces dust and other dirt deposited on the lens, and can protect the lens, the ventilation and exhaust devices are arranged on the left side wall and the right side wall of the shell, only one of the two ventilation and exhaust devices is in a working state all the time, when the ventilation and exhaust device on the left side works, the filtering device on the ventilation and exhaust device on the right side can filter air entering the shell, dust and other dirt are accumulated on the filtering device on the right side, dust and other dirt can be prevented from entering the shell, and the microcontroller is used for controlling the two ventilation and exhaust devices to alternately run, when the right ventilation and exhaust device works, dirt such as dust and the like accumulated on the right filtering device is blown out by the right exhaust fan, so that the dirt such as the dust and the like can be prevented from entering the shell, the dirt such as the dust and the like on the filtering device can be automatically cleaned, the heat dissipation efficiency of components in the shell can be ensured, the projector can be quickly and effectively cooled, and the service life of the invention is ensured.

Drawings

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

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a top view of the housing;

fig. 4 is a control schematic of the present invention.

The reference numbers in the drawings: 1. a hoisting frame; 2. a housing; 3. a lens; 4. a first motor; 5. a baffle plate; 6. a ventilation exhaust device; 61. an exhaust fan; 62. a filtration device; 63. a drive motor; 64. an eccentric column; 65. an elastic rapping column; 7. a control device; 8. a mounting frame; 9. adjusting a rod; 10. a slider; 11. a chute; 12. a lead screw; 13. controlling the motor; 14. an elastic pad; 15. a rubber scraper.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

As shown in fig. 3, the end where the lens 3 is located is defined as the front end of the housing 2.

The invention relates to a digital media teaching demonstration device which comprises a hoisting frame 1 and a projector, wherein the projector is installed at the bottom of the hoisting frame 1, the hoisting frame 1 comprises an installation plate for fixing and a connecting column vertically welded on the installation plate, the installation plate is provided with an installation hole for installing a foundation bolt, and the hoisting frame 1 can be fixed on a ceiling in a classroom through the foundation bolt. The projecting apparatus includes casing 2, and the top of casing 2 is equipped with the hinge ear that suits with hoist and mount frame 1, adopts the integral type structure between hinge ear and the casing 2, and is articulated with hoist and mount frame 1 through the articulated shaft, be equipped with angle adjusting device between casing 2 and the hoist and mount frame 1, can adjust the contained angle between casing 2 and the hoist and mount frame 1 through angle adjusting device, can adjust the projection angle of projecting apparatus. The middle part of the front end of casing 2 is equipped with the camera lens 3 that outwards stretches out, the downside of camera lens 3 is equipped with first motor 4, and first motor 4 is fixed on casing 2, install baffle 5 that suits with camera lens 3 in the pivot of first motor 4, be equipped with the mounting hole that suits with first motor 4's pivot on the baffle 5, baffle 5 is used for sheltering from camera lens 3, and first motor 4 starts, can drive baffle 5 and rotate round the axial lead of first motor 4's pivot, can shelter from or open camera lens 3, when not using, shelters from camera lens 3 through baffle 5 and can avoid filths such as dust to pile up on camera lens 3, guarantees camera lens 3's projection effect, can reduce the maintenance frequency to the camera lens. All install ventilation exhaust apparatus 6 on the left and right sides wall of casing 2, the both sides of casing 2 all are equipped with the both ends open-ended shell of outside extension, adopt the integral type structure between shell and the casing 2, and ventilation exhaust apparatus 6 installs in the shell, utilizes ventilation exhaust apparatus 6 to discharge the heat in casing 2, carries out the heat exchange with the external world, and then reduces the inside temperature of casing 2, prevents the components and parts in the casing 2, because of high temperature is impaired, guarantees life. Ventilation exhaust apparatus 6 is including inlaying exhaust fan 61 on casing 2, and exhaust fan 61 is used for discharging the hot-air in casing 2, one side that casing 2 was kept away from to exhaust fan 61 covers has filter equipment 62, and filter equipment 62 inlays in the shell, and filter equipment 62 can adopt filter screen or other filter equipment, and external air gets into casing 2 after filter equipment 62 filters, can filter filths such as dust in the air, prevents that external dust from getting into casing 2 after, piles up on the components and parts in casing 2, guarantees the radiating efficiency of components and parts in casing 2, and then guarantees the life of the components and parts in casing 2, be equipped with controlling means 7 on casing 2, controlling means 7 is located the front end at casing 2 top to make casing 2 front and back both ends gravity balanced as far as, controlling means 7 includes microcontroller, wireless control module, The wireless control module and the relay are connected with the microcontroller through signals, two exhaust fans 61 are connected in parallel, one exhaust fan 61 is connected with a normally open contact of the relay, the other exhaust fan 61 is connected with a normally closed contact of the relay, only one of the two ventilation and exhaust devices 6 can be controlled to be in a working state by the relay, when the ventilation and exhaust device 6 on the left side works, the filtering device 62 on the right side ventilation and exhaust device 6 can filter air entering the shell 2, dirt such as dust is accumulated on the filtering device 62 on the right side, the dirt such as dust can be prevented from entering the shell 2, the relay is controlled by the microcontroller, the two ventilation and exhaust devices 6 are controlled to alternately run by the relay, and when the ventilation and exhaust device 6 on the right side works, the dirt such as dust previously accumulated on the filtering device 62 on the right side is blown out by the exhaust fan 61 on the right side, the automatic cleaning device can prevent dirt such as dust from entering the shell, can automatically clean the dirt such as dust on the filtering device, can ensure the heat dissipation efficiency of components inside the shell, can ensure the projector to quickly and effectively dissipate heat, and can ensure the service life of the automatic cleaning device.

Further, in order to reduce the influence of motor operation to the camera lens, be equipped with the mounting bracket 8 that suits with first motor 4 on the casing 2, mounting bracket 8 can adopt the barrel type structure, adopts integral type mechanism between mounting bracket 8 and the casing 2, and first motor 4 inlays in mounting bracket 8, leave the clearance between mounting bracket 8 and the camera lens 3.

Further, for the convenience of adjustment of projection angle, angle adjusting device is including adjusting pole 9, the one end of adjusting pole 9 is articulated with the rear portion on the top of casing 2, and the other end articulates there is slider 10, hoist and mount frame 1 is gone up the vertical spout 11 that suits with slider 10 that is equipped with, and spout 11 passes through the vertical fixing of hexagon socket head cap screw on hoist and mount frame 1, the vertical lead screw 12 that is equipped with in spout 11, lead screw 12 and hoist and mount frame 1 rotate and be connected, control motor 13 is installed on the top of lead screw 12, and control motor 13 fixes on hoist and mount frame 1 and control motor 13's pivot is connected through the adapter sleeve transmission with lead screw 12, it has the screw that suits with lead screw 12 to inlay on the slider 10, control motor 13 and microcontroller signal connection can be convenient for adjust the projection angle through remote control motor 13.

Further, in order to ensure the sealing performance between the lens and the baffle, an elastic pad 14 is adhered to one side of the baffle 5 close to the lens 3, the elastic pad 14 may be a circular rubber pad, and the diameter of the elastic pad 14 is greater than the outer diameter of the lens 3.

Further, in order to prevent the dust on the baffle from falling on the lens, the edge of the lens 3 is provided with a rubber scraper 15 adapted to the baffle 5, the number of the rubber scrapers 15 is at least two, the rubber scraper 15 is annular, is bonded at the end part of the outer wall of the lens 3, can remove the dust on the baffle 5 in the rotating process of the baffle 5, and prevents the dust on the baffle from falling on the lens.

Further, for the quick filth such as dust with on the filter equipment clear away, guarantee the fluency of ventilating, be equipped with rapping device between exhaust fan 61 and the filter equipment 62, rapping device includes driving motor 63, and driving motor 62 is fixed in the outside of shell, and in driving motor 63's pivot was inserted the shell, install eccentric post 64 in driving motor 63's the pivot, be equipped with a plurality of on eccentric post 64's the outer wall and be used for hitting the elasticity of beating filter equipment 62 and rap post 65, driving motor 63 starts, can drive eccentric post 64 and rotate, and along with eccentric post 64's rotation, elasticity is rapped post 65 and is constantly beaten filter equipment 62 and hit, can shake the filth such as the dust that glues on filter equipment and get off, is convenient for the last clear of filth such as dust of filter equipment.

Claims

1. The utility model provides a digital media teaching presentation device, includes hoist and mount frame (1), projecting apparatus, the bottom at hoist and mount frame (1) is installed to the projecting apparatus, its characterized in that: the projecting apparatus include with hoist and mount frame (1) articulated casing (2), be equipped with angle adjusting device between casing (2) and hoist and mount frame (1), the middle part of the front end of casing (2) is equipped with camera lens (3), the downside of camera lens (3) is equipped with first motor (4), be equipped with baffle (5) that suit with camera lens (3) in the pivot of first motor (4), all install ventilation exhaust apparatus (6) on the left and right sides wall of casing (2), ventilation exhaust apparatus (6) are including inlaying exhaust fan (61) on casing (2), one side that casing (2) were kept away from in exhaust fan (61) covers filter equipment (62), be equipped with controlling means (7) on casing (2), controlling means (7) include microcontroller, wireless control module, relay, wireless control module, The relay all with microcontroller signal connection, two exhaust fan (61) are parallelly connected, and one of them exhaust fan (61) are connected with the normally open contact of relay, and the normally closed contact of another one exhaust fan (61) and relay is connected.

2. A digital media teaching presentation device according to claim 1, wherein: be equipped with on casing (2) mounting bracket (8) that suit with first motor (4), leave the clearance between mounting bracket (8) and camera lens (3).

3. A digital media teaching presentation device according to claim 1, wherein: the angle adjusting device comprises an adjusting rod (9), one end of the adjusting rod (9) is hinged to the rear portion of the top end of the shell (2), the other end of the adjusting rod is hinged to a sliding block (10), a sliding groove (11) matched with the sliding block (10) is vertically formed in the hoisting frame (1), a lead screw (12) is arranged in the sliding groove (11), a control motor (13) is arranged on the top end of the lead screw (12), a screw nut matched with the lead screw (12) is arranged on the sliding block (10), and the control motor (13) is in signal connection with a microcontroller.

4. A digital media teaching presentation device according to claim 1, wherein: an elastic pad (14) is pasted on one side of the baffle (5) close to the lens (3).

5. A digital media teaching presentation device according to claim 1, wherein: the edge of the lens (3) is provided with rubber scrapers (15) which are matched with the baffle (5), and the number of the rubber scrapers (15) is at least two.

6. A digital media teaching presentation device according to claim 1, wherein: be equipped with rapping device between exhaust fan (61) and filter equipment (62), rapping device includes driving motor (63), install eccentric post (64) in driving motor's (63) the pivot, be equipped with a plurality of on the outer wall of eccentric post (64) and be used for hitting elasticity rapping post (65) of beating filter equipment (62).