CN207074339U - A kind of computer teaching projection screen - Google Patents

Abstract

The utility model discloses a kind of computer teaching projection screen,Including case,The upper end of the case is welded with T-shaped fixed mount,The T-shaped fixed mount is fixed by particle size screw with metope,The inside of the case is fixed with motor,The side of the motor is welded with rotating shaft,The other end of the rotating shaft is socketed in bearing holder (housing, cover),Steel ball is installed at the center of the bearing holder (housing, cover),The steel ball is provided with eight altogether,And eight steel balls are rounded is evenly distributed in inside circular hole retainer,The appearance wall of the rotating shaft is installed with wind-up roll,The both ends of the wind-up roll are welded with winding and keep disk,This computer teaching projection screen,The counter weight strip set in equipment can carry out sizeable plug together with mouth groove,When the equipment is not used,Effective dust reduction capability can be carried out,And it is additionally provided with winding in device interior and keeps disk,In projection screen carries out lifting behavior,It can effectively prevent screen from occurring rolling so as to influence the situation of screen flatness.

Description

A kind of computer teaching projection screen

Technical field

The technical field of teaching projection screen equipment is the utility model is related to, specially a kind of computer teaching projection screen Curtain.

Background technology

With the continuous development of society, scientific and technical continuous renewal, requirement of the people to social public institution is increasingly Height, school are the important components of social public institution, are the cradle for cultivating the social talent, its ranks of teachers and teaching facilities Paid close attention to by parent and students, with the development of the society, teaching equipment updates, electronic equipment is daily teaching activity The condition provided convenience, is favored by school.

The important electronic equipment that projection screen is given lectures as classroom, its feature is most important, current market sales of Projection screen species is complete, not of uniform size, but some producers sale projection screen during use there is some not Foot part, projection screen manufacture material is poor, and the writing pattern when extraneous light is brighter on projection screen does not see Chu, and in length Equipment can be caused to damage because dust is excessive during the use of time, it is impossible to provide reliable teaching bar for education activities Part.

Utility model content

The purpose of this utility model is to provide a kind of computer teaching projection screen, to solve in above-mentioned background technology The problem of proposition.

To achieve the above object, the utility model provides following technical scheme：A kind of computer teaching projection screen, bag Case is included, the upper end of the case is welded with T-shaped fixed mount, and the T-shaped fixed mount is fixed by particle size screw with metope, The inside of the case is fixed with motor, and the side of the motor is welded with rotating shaft, and the other end of the rotating shaft is socketed in bearing In set, steel ball is installed, the steel ball is provided with eight altogether, and eight steel balls are rounded uniform at the center of the bearing holder (housing, cover) It is distributed in inside circular hole retainer, the appearance wall of the rotating shaft is installed with wind-up roll, and the both ends of the wind-up roll are welded with Winding keeps disk, and the appearance wall of wind-up roll is wrapped with projection screen, and the appearance wall of the projection screen is provided with diffusing reflection layer, described The side of diffusing reflection layer is coated with PVC top layers, and the side on the PVC top layers is provided with glass fibers layer, and the side of the glass fibers layer is consolidated Surely there are PVC bottoms, the bottom of the projection screen is installed with rod, and the rod is welded on inside counter weight strip, the receipts The diameter of volume holding disk is wider than the diameter of wind-up roll four centimetres, and the lower end of the case is provided with a mouthful groove.

Preferably, the side of the case is threadedly coupled by thin footpath screw with L-type fixed mount, and the L-type is fixed Frame is fixed by particle size screw with metope.

Preferably, the T-shaped shape of the counter weight strip, and the width of counter weight strip upper end is equal with the width of mouth groove.

Preferably, the motor is fixedly connected by motor rack and case, and motor is carried out electrically with external power source Connection.

Preferably, the thickness of the projection screen is 0.32 millimeter.

Compared with prior art, the beneficial effects of the utility model are：This computer teaching projection screen, in equipment The counter weight strip of setting can with mouth groove carry out it is sizeable plug together, be not used the equipment when, effective dust reduction capability can be carried out, And be additionally provided with winding in device interior and keep disk, in projection screen carries out lifting behavior, effectively it can prevent screen from occurring Roll so as to influence the situation of screen flatness, while the screen uses soft PVC material, colour reproduction is good, the angle of visual field Greatly, light is soft, does not hinder eye, and service life is grown, and is adapted to education activities.

Brief description of the drawings

Fig. 1 is the utility model overall structure front view；

Fig. 2 is the utility model overall structure side view；

Fig. 3 is the structural front view of the utility model bearing holder (housing, cover)；

Fig. 4 is the internal structure schematic diagram of the utility model projection screen.

In figure：1- particle size screws；2-T type fixed mounts；3- cases；4- bearing holder (housing, cover)s；5- windings keep disk；6- mouth grooves；7- is thrown Shadow screen；8- wind-up rolls；9- rotating shafts；10- motors；11- motor racks；12- counter weight strips；13-L type fixed mounts；14- thin footpath screws； 15- rods；16- steel balls；17- circular hole retainers；18-PVC bottoms；19- glass fibers layers；20-PVC top layers；21- diffusing reflection layers.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Fig. 1-4 are referred to, the utility model provides a kind of technical scheme：A kind of computer teaching projection screen, including Case 3, the upper end of the case 3 are welded with T-shaped fixed mount 2, and the T-shaped fixed mount 2 is consolidated by particle size screw 1 and metope Fixed, the inside of the case 3 is fixed with motor 10, and the side of the motor 10 is welded with rotating shaft 9, the other end of the rotating shaft 9 It is socketed in bearing holder (housing, cover) 4, steel ball 16 is installed at the center of the bearing holder (housing, cover) 4, the steel ball 16 is provided with eight, and eight altogether Steel ball 16 is rounded to be evenly distributed in inside circular hole retainer 17, and the appearance wall of the rotating shaft 9 is installed with wind-up roll 8, The both ends of the wind-up roll 8 are welded with winding and keep disk 5, and the appearance wall of wind-up roll 8 is wrapped with projection screen 7, the projection screen The appearance wall of curtain 7 is provided with diffusing reflection layer 21, and the side of the diffusing reflection layer 21 is coated with PVC top layers 20, and the one of the PVC top layers 20 Side is provided with glass fibers layer 19, and the side of the glass fibers layer 19 is fixed with PVC bottoms 18, and the bottom of the projection screen 7 is fixed Rod 15 is installed, the rod 15 is welded on inside counter weight strip 12, and the winding keeps the diameter of disk 5 more straight than wind-up roll 8 Footpath is wide four centimetres, and the lower end of the case 3 is provided with mouthful groove 6.

The side of case 3 is threadedly coupled by thin footpath screw 14 with L-type fixed mount 13, and the L-type fixed mount 13 is logical Particle size screw 1 is crossed to be fixed with metope, can be tight by equipment by the dual fixation of L-type fixed mount 13 and T-shaped fixed mount 2 Tight is fixed on metope, will not loosen, and ensure that stability when equipment uses, the 12 T-shaped shape of counter weight strip, and The width of the upper end of counter weight strip 12 is equal with the width of mouth groove 6, and both can be plugged together, so as to carry out effective dust reduction capability, The motor 10 is fixedly connected by motor rack 11 and case 3, and motor 10 is electrically connected with external power source, described The thickness of projection screen 7 is 0.32 millimeter.

Operation principle：In use, L-type fixed mount 13 is fixed on to the side of case 3 first with thin footpath screw 14, then profit Case 3 is fixed on suitable metope by L-type fixed mount 13 and T-shaped fixed mount 2 with particle size screw 1, then by motor 10 with External power source is electrically connected with, and rotating shaft 9 starts to rotate, and projection screen 7 moves downward under the Action of Gravity Field of counter weight strip 12, is thrown After the 7 smooth expansion of shadow screen, under the irradiation of projecting apparatus, pass through the reflection of 21 pairs of light of diffusing reflection layer on surface so that in classroom Student can clearly see word and picture on projection screen 7 clearly, then after education activities terminate, process of the curtain in rising In, upper end and the mouth groove 6 of counter weight strip 12 plug together, and avoid dust and equipment is caused to damage.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of computer teaching projection screen, including case（3）, it is characterised in that：The case（3）Upper end be welded with T-shaped fixed mount（2）, the T-shaped fixed mount（2）Pass through particle size screw（1）It is fixed with metope, the case（3）Inside It is fixed with motor（10）, the motor（10）Side be welded with rotating shaft（9）, the rotating shaft（9）The other end be socketed in bearing Set（4）It is interior, the bearing holder (housing, cover)（4）Center at steel ball is installed（16）, the steel ball（16）Eight, and eight steel are provided with altogether Pearl（16）It is rounded to be evenly distributed in circular hole retainer（17）Inside, the rotating shaft（9）Appearance wall be installed with winding Roller（8）, the wind-up roll（8）Both ends be welded with winding keep disk（5）, and wind-up roll（8）Appearance wall be wrapped with projection screen （7）, the projection screen（7）Appearance wall be provided with diffusing reflection layer（21）, the diffusing reflection layer（21）Side be coated with PVC top layers （20）, the PVC top layers（20）Side be provided with glass fibers layer（19）, the glass fibers layer（19）Side be fixed with PVC bottoms Layer（18）, the projection screen（7）Bottom be installed with rod（15）, the rod（15）It is welded on counter weight strip（12）It is interior Portion, the winding keep disk（5）Diameter compare wind-up roll（8）Diameter it is wide four centimetres, the case（3）Lower end be provided with a mouthful groove （6）.

A kind of 2. computer teaching projection screen according to claim 1, it is characterised in that：The case（3）One Side passes through thin footpath screw（14）With L-type fixed mount（13）It is threadedly coupled, the L-type fixed mount（13）Pass through particle size screw （1）It is fixed with metope.

A kind of 3. computer teaching projection screen according to claim 1, it is characterised in that：The counter weight strip（12）It is in T-shaped shape, and counter weight strip（12）The width of upper end and mouth groove（6）Width it is equal.

A kind of 4. computer teaching projection screen according to claim 1, it is characterised in that：The motor（10）Pass through Motor rack（11）With case（3）It is fixedly connected, and motor（10）It is electrically connected with external power source.

A kind of 5. computer teaching projection screen according to claim 1, it is characterised in that：The projection screen（7） Thickness be 0.32 millimeter.