CN114120757A - Three-dimensional fine arts teaching display device of shadow transform - Google Patents
Three-dimensional fine arts teaching display device of shadow transform Download PDFInfo
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- CN114120757A CN114120757A CN202111577191.4A CN202111577191A CN114120757A CN 114120757 A CN114120757 A CN 114120757A CN 202111577191 A CN202111577191 A CN 202111577191A CN 114120757 A CN114120757 A CN 114120757A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B11/00—Teaching hand-writing, shorthand, drawing, or painting
- G09B11/10—Teaching painting
Abstract
The invention relates to the field of art teaching, in particular to a three-dimensional art teaching display device with light and shadow transformation. The technical problems that the conventional illuminating light cannot change the light atmosphere according to scenes, the presentation form of an object is single, and a direct light source influences the observation of a learner are solved. The invention provides a three-dimensional art teaching and showing device with light and shadow conversion, which comprises a light transmission unit, a light and shadow conversion unit and the like; the light transmission unit is provided with a light and shadow conversion unit. In the invention, the light source is wrapped in the filter cloth, the light shadow area of the object is changed by adjusting the position and the angle of the light source positioned behind the filter cloth, the three-dimensional shape of the object is shown, the invention is suitable for various scene changes, and the corresponding light atmosphere is provided.
Description
Technical Field
The invention relates to the field of art teaching, in particular to a three-dimensional art teaching display device with light and shadow transformation.
Background
The copying of three-dimensional images is an important link of art teaching, the size and the dispersion range of an aperture are adjusted by irradiating light on the surface of an object, so that the object presents a dark and bright interface area, a learner draws the shape and the color distribution of the object through the light and shadow distribution on the object, the three-dimensional form of the object is shown by changing the light and shadow area of the object, and if the position and the dispersion range of the aperture on the object are ideal, the understanding and the mastering degree of the light and shadow of the learner are greatly facilitated.
However, the conventional display platform for three-dimensional object copying only provides a base cloth laying platform and more basic illumination light, the conventional illumination light can only simply adjust the size of an aperture and remotely adjust the aperture, and the conventional display platform lacks the function of providing corresponding atmosphere light when dealing with different scenes, so that the display form of the object is single, strong light is directly irradiated on the surface of the object, a large number of reflective layers appear at the positions of the object surface facing the light, the judgment of learners on the boundary lines of all surfaces of the object is influenced, learners surround the display platform to perform copying description, learners facing the light source are easily influenced by the light source, the dazzling light source and a dim background form an obvious bright fall, the learners are inconvenient and clear to observe the light shadow on the object, and the deep learning of learners on understanding of the light shadow is not facilitated.
Disclosure of Invention
The invention provides a light and shadow transformation three-dimensional art teaching display device, aiming at overcoming the defects that the conventional illumination light can not change the light atmosphere according to the scene, the display form of an object is single, and the observation of a learner is influenced by a direct light source.
The technical implementation scheme of the invention is as follows: a three-dimensional art teaching display device of light and shadow transform comprises a light transmission unit, a light and shadow transform unit, a diaphragm accumulation unit, a display stand, an electric turntable, a support rod, an electric rotating shaft and a back plate, wherein the lower side of the display stand is connected with the electric turntable; the light transmission unit comprises a fixed frame, an electric roller body, a first straight gear, a first rotating shaft, a second straight gear, first spring telescopic rods, a transmission roller body and filter cloth, wherein the fixed frame is fixedly connected between the front end and the rear end of the electric rotating shaft, the electric roller body is connected to the upper part of the left side of the fixed frame, the first straight gear is fixedly connected to the front end of the electric roller body, the first rotating shaft is fixedly connected to the lower part of the left side of the fixed frame, the second rotating shaft is rotatably connected to the upper part of the right side of the fixed frame, the second rotating shaft is also rotatably connected to the lower part of the right side of the fixed frame, the second straight gear is respectively fixedly connected to the front ends of the two second rotating shafts, the second straight gear positioned on the upper side is meshed with the first straight gear, the two adjacent second straight gears in front and back are meshed, the front ends and the rear ends of the two second rotating shafts are respectively fixedly connected with the first spring telescopic rods, and the transmission roller body is rotatably connected between the two adjacent first spring telescopic rods in front and back, the fixed connection has the filter cloth between first axis of rotation and the electronic roll body, and the right side of filter cloth is around establishing the surface at two transmission roll bodies about last respectively, and light and shadow transform unit is all connected to mount and two second axes of rotation, and the mount all is connected the light ring and is gathered the unit with the second axis of rotation.
Preferably, the lower part of the left side of the filter cloth is provided with a first opening, and the first opening is of a transverse rectangular structure.
Preferably, the lower part of the left side of the filter cloth is provided with a second opening, the second opening is positioned above the first opening, and the first opening is of a circular structure.
Preferably, the light and shadow transformation unit comprises side plates, two spring telescopic rods, fixed rods, electric two-way screw rods, transverse sliding blocks, light barriers and bulbs, wherein the right side of the fixed frame is fixedly connected with the two side plates, the upper sides and the lower sides of the two side plates are respectively and slidably connected with one lifting sliding block, the outer sides of the four lifting sliding blocks are respectively and rotatably connected with one second spring telescopic rod through a rotating shaft between adjacent second rotating shafts, the inner sides of the two groups of front and rear adjacent lifting sliding blocks are respectively and fixedly connected with one fixed rod, the inner sides of the two fixed rods are respectively and fixedly connected with one electric two-way screw rod, the inner front sides and the inner rear sides of the two fixed rods are respectively and slidably connected with one transverse sliding block, the four transverse sliding blocks are respectively connected with one adjacent electric two-way screw rods, and one side of the four transverse sliding blocks, which is close to the second rotating shafts, is respectively and fixedly connected with one light barrier, one side of each light barrier close to the second rotating shaft is fixedly connected with a bulb.
Preferably, the diaphragm accumulating unit comprises a first fixed block, a first electric telescopic part, a light-gathering shell and a light-adjusting component, the middle side of the fixed frame is fixedly connected with the first fixed block, the upper side and the lower side of the first fixed block are respectively connected with two second rotating shafts in a rotating mode, the right side of the first fixed block is fixedly connected with the first electric telescopic part, the right side of the first electric telescopic part is fixedly connected with the light-gathering shell, and the right side of the light-gathering shell is connected with the light-adjusting component.
Preferably, the light modulation component comprises a second electric telescopic part, a second fixed block, a push ring, a convex lens, wedge-shaped sliding blocks, wedge-shaped fixed blocks, a first light blocking sheet and a second light blocking sheet, the front part of the right side of the light gathering shell and the rear part of the right side of the light gathering shell are respectively fixedly connected with a second electric telescopic part, the telescopic ends of the two second electric telescopic parts are respectively fixedly connected with a second fixed block, the push ring is fixedly connected between the left sides of the two second fixed blocks, the convex lens is fixedly connected between the right sides of the two second fixed blocks, eight wedge-shaped sliding blocks are slidably connected around the right side surface of the light gathering shell, the right sides of the eight wedge-shaped sliding blocks are respectively fixedly connected with a wedge-shaped fixed block, the left sides of the eight wedge-shaped sliding blocks are respectively tightly attached to the push ring, the right sides of the eight wedge-shaped fixed blocks are respectively tightly attached to the convex lens, the right sides of the four wedge-shaped sliding blocks are respectively fixedly connected with a first light blocking sheet, and the right sides of the four wedge-shaped sliding blocks are respectively fixedly connected with a second light blocking sheet, the first light blocking sheets and the second light blocking sheets are alternately arranged, and the four second light blocking sheets are respectively positioned on the right sides of the four first light blocking sheets.
Preferably, four slots corresponding to the light barrier are formed around the left annular surface of the light gathering shell.
Preferably, the cloth adjusting device further comprises a bottom cloth adjusting unit, the bottom cloth adjusting unit is arranged on the back plate and comprises an adjusting bidirectional screw rod, a knob, a sliding fixing plate and push plates, the upper side of the back plate is rotatably connected with the adjusting bidirectional screw rod, the front end and the rear end of the adjusting bidirectional screw rod are fixedly connected with the knob respectively, the front portion of the upper side of the back plate and the rear portion of the upper side of the back plate are respectively and slidably connected with the sliding fixing plate, the two sliding fixing plates are connected with the front end and the rear end of the adjusting bidirectional screw rod respectively, and the left sides of the four sliding fixing plates are fixedly connected with the push plates.
Preferably, the outer end of each push plate is provided with a barb structure.
Has the advantages that: in the invention, the light source is wrapped in the filter cloth, the strong light emitted by the light source is filtered, the medium strong light emitted by the light source is laid on the display platform in a large area, the multi-angle irradiation rendering is carried out on the object by simulating the morning sunlight, the inconvenience of observing the object caused by the strong light directly irradiating the eyes of learners is avoided, the light shadow area of the object is changed by adjusting the position and the angle of the light source positioned behind the filter cloth, the three-dimensional shape of the object is displayed, the filter cloth is also provided with a plurality of light through holes, the strong light of partial light source directly passes through the light through holes on the filter cloth to be arranged on the object, and simultaneously the medium strong light from the surrounding filter cloth is matched to provide light and shade, so as to adapt to the change of a plurality of scenes and provide corresponding light atmosphere, in addition, when the small object needs to be displayed, the light sources are gathered together to form a small aperture, and the strong light of the light source is changed into weak light, the size and the dispersion range of the small aperture are adjusted by adjusting the distance between the center of the shading ring and the distance between the convex lens and the light source, so that the small object is displayed, an obvious light and shade boundary area is kept on the small object, the shape of the small object is perfectly displayed, the technical problems that the conventional irradiation light cannot change the light atmosphere according to a scene, the display form of the object is single, and the direct light source influences the observation of a learner are solved.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a partial perspective view of the present invention;
FIG. 3 is a schematic diagram of a first three-dimensional structure of the light-transmitting unit according to the present invention;
FIG. 4 is an enlarged view of region V1 of the present invention;
FIG. 5 is a schematic diagram of a second three-dimensional structure of the light-transmitting unit according to the present invention;
FIG. 6 is a schematic perspective view of a light and shadow conversion unit according to the present invention;
FIG. 7 is an enlarged view of region V2 of the present invention;
FIG. 8 is a schematic perspective view of an aperture accumulating unit according to the present invention;
FIG. 9 is a schematic partial perspective view of a diaphragm accumulating unit according to the present invention;
FIG. 10 is a perspective view of the light-focusing housing of the present invention;
FIG. 11 is a first partial operational view of the present invention;
FIG. 12 is a second partial operational view of the present invention;
FIG. 13 is a schematic perspective view of a base fabric conditioning unit of the present invention.
The parts are labeled as follows: 1-display stand, 2-electric turntable, 3-support bar, 4-electric rotating shaft, 5-back plate, 101-fixing frame, 102-electric roller body, 103-first straight gear, 104-first rotating shaft, 105-second rotating shaft, 106-second straight gear, 107-first spring telescopic rod, 108-transmission roller body, 109-filter cloth, 109 a-first opening, 109 b-second opening, 201-side plate, 202-lifting slide block, 203-second spring telescopic rod, 204-fixing rod, 205-electric bidirectional screw rod, 206-transverse slide block, 207-light barrier, 208-bulb, 301-first fixing block, 302-first electric telescopic part, 303-light-gathering shell, 304-second electric telescopic part, 305-a second fixed block, 306-a push ring, 307-a convex lens, 308-a wedge-shaped sliding block, 309-a wedge-shaped fixed block, 310-a first light blocking sheet, 311-a second light blocking sheet, 401-an adjusting bidirectional screw rod, 402-a knob, 403-a sliding fixed plate and 404-a push plate.
Detailed Description
The invention is further described below with reference to the figures and examples.
Example 1
A three-dimensional art teaching display device with light and shadow transformation is disclosed, as shown in figures 1-10, and comprises a light transmission unit, a light and shadow transformation unit, an aperture accumulation unit, a display platform 1, an electric turntable 2, a support rod 3, an electric rotating shaft 4 and a back plate 5; the lower side of the display platform 1 is connected with an electric turntable 2; a support rod 3 is fixedly connected to the left side of the electric turntable 2; the upper part of the left side of the support rod 3 is connected with an electric rotating shaft 4; a back plate 5 is fixedly connected to the right side of the display stand 1; the electric rotating shaft 4 is connected with a light transmission unit; the middle side of the light transmission unit is connected with a light and shadow conversion unit; the right side of the light transmitting unit is connected with a diaphragm accumulating unit; the light and shadow conversion unit is connected with the aperture accumulation unit.
As shown in fig. 3-5, the light-transmitting unit includes a fixing frame 101, an electric roller 102, a first spur gear 103, a first rotating shaft 104, a second rotating shaft 105, a second spur gear 106, a first spring telescopic rod 107, a transmission roller 108, and a filter cloth 109; a fixing frame 101 is fixedly connected between the front end and the rear end of the electric rotating shaft 4; the upper part of the left side of the fixed frame 101 is connected with an electric roller body 102; the front end of the electric roller body 102 is fixedly connected with a first straight gear 103; a first rotating shaft 104 is fixedly connected to the lower part of the left side of the fixed frame 101; the upper part of the right side of the fixing frame 101 is rotatably connected with a second rotating shaft 105; the lower part of the right side of the fixed frame 101 is also rotatably connected with a second rotating shaft 105; the front ends of the two second rotating shafts 105 are respectively fixedly connected with a second straight gear 106; the second spur gear 106 positioned on the upper side is meshed with the first spur gear 103; two second straight gears 106 adjacent in front and back are meshed; the front ends and the rear ends of the two second rotating shafts 105 are respectively fixedly connected with a first spring telescopic rod 107; a transmission roller body 108 is rotatably connected between two front and back adjacent first spring telescopic rods 107; the first rotating shaft 104 is fixedly connected with a filter cloth 109; the filter cloth 109 bypasses the outer surfaces of the upper and lower transmission roller bodies 108 and is fixedly connected with the electric roller body 102; the fixed frame 101 and the two second rotating shafts 105 are both connected with a light and shadow conversion unit; the mount 101 and the second rotating shaft 105 are connected to a diaphragm accumulating unit.
As shown in fig. 3, a first opening 109a is formed in the lower portion of the left side of the filter cloth 109, and the first opening 109a has a transverse rectangular structure; the lower portion of the left side of the filter cloth 109 is provided with a second opening 109b, the second opening 109b is located above the first opening 109a, and the first opening 109a is in a circular structure.
As shown in fig. 6-7, the light and shadow conversion unit includes a side plate 201, a lifting slide block 202, a second spring expansion link 203, a fixing rod 204, an electric two-way screw 205, a transverse slide block 206, a light barrier 207 and a bulb 208; two side plates 201 are connected to the right side of the fixing frame 101 through bolts; the upper side and the lower side of the two side plates 201 are respectively connected with a lifting slide block 202 in a sliding way; a second spring telescopic rod 203 is respectively and rotatably connected between the outer sides of the four lifting slide blocks 202 and the adjacent second rotating shafts 105 through rotating shafts; a fixing rod 204 is connected between the inner sides of the front and rear adjacent lifting slide blocks 202 through bolts; the inner sides of the two fixing rods 204 are respectively connected with an electric bidirectional screw rod 205; the two fixing rods 204 are respectively connected with a transverse sliding block 206 in a sliding manner at the inner front side and the inner rear side; four transverse sliding blocks 206 are respectively in threaded connection with an adjacent electric bidirectional screw rod 205; one side of each of the four transverse sliding blocks 206 close to the second rotating shaft 105 is connected with a light barrier 207 through bolts; one light bulb 208 is fixedly connected to one side of each of the four light blocking plates 207 close to the second rotating shaft 105.
As shown in fig. 8-10, the aperture accumulating unit includes a first fixed block 301, a first electric telescopic member 302, a light-focusing housing 303 and a light-adjusting assembly; a first fixing block 301 is connected to the middle bolt of the fixing frame 101; the upper side and the lower side of the first fixing block 301 are respectively connected with two second rotating shafts 105 in a rotating manner; a first electric telescopic part 302 is fixedly connected to the right side of the first fixed block 301; a light-gathering shell 303 is connected to the right bolt of the first electric telescopic part 302; four slots corresponding to the light barrier 207 are arranged around the left ring surface of the light gathering shell 303; the right side of the light-gathering shell 303 is connected with a dimming component.
The dimming component comprises a second electric telescopic part 304, a second fixed block 305, a push ring 306, a convex lens 307, a wedge-shaped sliding block 308, a wedge-shaped fixed block 309, a first light barrier 310 and a second light barrier 311; the front part of the right side of the light-gathering shell 303 and the rear part of the right side are respectively fixedly connected with a second electric telescopic part 304; the telescopic ends of the two second electric telescopic parts 304 are respectively fixedly connected with a second fixed block 305; a push ring 306 is welded between the left sides of the two second fixed blocks 305; a convex lens 307 is fixedly connected between the right sides of the two second fixed blocks 305; eight wedge-shaped sliding blocks 308 are connected around the right side surface of the light gathering shell 303 in a sliding manner; the right sides of the eight wedge-shaped sliding blocks 308 are fixedly connected with a wedge-shaped fixed block 309 respectively; the left sides of the eight wedge-shaped sliding blocks 308 are tightly attached to the push ring 306; the right sides of the eight wedge-shaped fixing blocks 309 are tightly attached to the convex lens 307; the right sides of the four wedge-shaped sliding blocks 308 are respectively and fixedly connected with a first light blocking sheet 310, the right sides of the four wedge-shaped sliding blocks 308 are respectively and fixedly connected with a second light blocking sheet 311, the first light blocking sheets 310 and the second light blocking sheets 311 are alternately arranged, and the four second light blocking sheets 311 are respectively positioned on the right sides of the four first light blocking sheets 310.
In the embodiment of the present invention, the first electric telescopic component 302 is an electric push rod, and the second electric telescopic component 304 is a micro telescopic rod.
Firstly, base cloth is laid on the display stand 1 and the back plate 5, an object to be displayed is placed on the display stand 1, then the four bulbs 208 are electrified, the strong light of the four bulbs 208 is intercepted by the filter cloth 109, the medium strong light of the four bulbs 208 penetrates through the filter cloth 109, the morning sunlight is simulated and laid on the object, the object is irradiated and rendered in multiple angles, the supporting rod 3 is driven by regulating the electric turntable 2 to rotate around the rotating center of the electric turntable 2, the fixing frame 101 is driven by regulating the electric rotating shaft 4 to turn up and down around the axis of the electric rotating shaft 4, so that the light shadow area of the object is changed by regulating the position and the angle of the bulb 208, the three-dimensional shape of the object is shown, in addition, the strong light source of the bulb 208 is intercepted by the filter cloth 109, which is beneficial to the learner facing the light source to observe the object, and avoids the inconvenience of the strong light irradiating the eyes of the learner to observe the object.
When the distance between the four bulbs 208 needs to be adjusted, the transverse sliding block 206 is driven by the electric bidirectional screw 205 to move along the fixing rod 204, so that the four transverse sliding blocks 206 respectively drive the four bulbs 208 to move in the opposite direction along the horizontal direction, and the electric roller 102 starts to rotate, the electric roller 102 winds the filter cloth 109, so that the filter cloth 109 moves along the two transmission rollers 108 towards the electric roller 102, meanwhile, the electric roller 102 drives the first straight gear 103 to rotate, the first straight gear 103 is meshed with the second straight gear 106 positioned at the upper side to drive the second rotating shaft 105 positioned at the upper side to rotate, the second straight gear 106 positioned at the upper side is meshed with the second straight gear 106 positioned at the lower side to drive the second rotating shaft 105 positioned at the lower side to rotate, so that the two second rotating shafts 105 respectively drive the upper and lower four first spring telescopic rods 107 to be closed in the opposite direction, and the upper and lower two second rotating shafts 105 are closed in the opposite direction, meanwhile, the filter cloth 109 tightened by the electric roller 102 passes through the second rotating shaft 105, the first spring telescopic rod 107 is driven to compress inwards, the compressed first spring telescopic rod 107 applies a reverse stretching force to the filter cloth 109 through the second rotating shaft 105, the filter cloth 109 is kept in a stretched state, the phenomenon that wrinkles of the filter cloth 109 affect light rays of the bulbs 208 irradiating the object is avoided, the four second spring telescopic rods 203 rotating along the second rotating shaft 105 are driven to push the four lifting sliding blocks 202 along the side plates 201, the two fixing rods 204 are driven to draw together in opposite directions, the four bulbs 208 move in opposite directions along the vertical direction to draw together in opposite directions, the size of the object is adjusted, the area of a light source irradiating the object is reduced, the boundary drop at the light and dark junction on the object is enhanced, and the observability of learners is improved.
In the process of rolling the filter cloth 109, when the first opening 109a of the filter cloth 109 is moved to between the four bulbs 208, the bright light of the four bulbs 208 passes through the first opening 109a of the filter cloth 109 and is spread on an object, and simultaneously the bright light from the surrounding filter cloth 109 is matched to provide two kinds of light with a large light-dark difference for the object, the bright light of the bulbs 208 simulates the sunlight from the gap to be spread on the local area of the object, so that the brightness of the local area of the object is improved, the bright light on the filter cloth 109 is spread on the rest parts of the object, so that the visibility of the gray-dark part around the object is improved, and simultaneously the distance between the four bulbs 208 is adjusted, so that the electric roller 102 is adaptive to various scene changes, provides a corresponding light atmosphere, and is greatly helpful for learners to understand and master the degree of the light and shadow.
When small objects need to be displayed, because the height and the volume of the objects are greatly reduced, light with large area is laid on the objects downwards, the darkness of the dark parts of the objects is affected, and the display of the shapes of the small objects is not facilitated, so that the four bulbs 208 need to be converted into a small aperture mode, firstly, the electric bidirectional screw 205 drives the transverse slider 206 and the four bulbs 208 to move oppositely along the fixed rod 204, meanwhile, the four lifting sliders 202 drive the two fixed rods 204 and the four bulbs 208 to approach oppositely along the side plate 201, meanwhile, the first electric telescopic part 302 drives the light-gathering shell 303 to push out towards the object direction, as shown in fig. 11-12, the four bulbs 208 enter the light-gathering shell 303, the four light-blocking plates 207 and the light-gathering shell 303 form a complete light-gathering tube, light emitted by the four bulbs 208 is gathered in the light-gathering tube, and simultaneously, the four bulbs 208 are converted from a strong light mode to a weak light mode, after the weak light rays of the four bulbs 208 are converged into a small aperture in the light-gathering tube, the small aperture is irradiated on a small object through the convex lens 307, and then the size and the scattering range of the small aperture are adjusted according to the light and shade boundary degree displayed on the small object, so that the small object is displayed, an obvious light and shade boundary area is kept on the small object, and the form of the small object is perfectly displayed.
During the adjustment of the size and the dispersion range of the small aperture, the telescopic end of the second electric telescopic part 304 drives the push ring 306 to approach to the small object through the second fixed block 305, so that the push ring 306 pushes the eight wedge-shaped sliding blocks 308 along the light-gathering shell 303 to drive the four first light-blocking sheets 310 and the four second light-blocking sheets 311 to approach to the center of the light-gathering shell 303, thereby realizing the condensation of the light-blocking ring composed of the four first light-blocking sheets 310 and the four second light-blocking sheets 311 to the center of the light-gathering shell 303, and reducing the size of the small aperture due to the blocking of the light-blocking ring, meanwhile, the moving second fixing block 305 drives the convex lens 307 to approach to the small object, so that the convex lens 307 is far away from the bulb 208, and after the small aperture is refracted by the convex lens 307, the dispersion range is changed, and the work of adjusting the size and the dispersion range of the small aperture is realized by adjusting the distance between the shading rings and the distance between the convex lens 307 and the light source.
Example 2
As shown in fig. 1-13, this embodiment is further optimized based on embodiment 1, and further includes a base cloth adjusting unit, the back plate 5 is provided with a base cloth adjusting unit, and the base cloth adjusting unit includes an adjusting bidirectional screw rod 401, a knob 402, a sliding fixing plate 403 and a push plate 404; the upper side of the back plate 5 is rotatably connected with an adjusting bidirectional screw rod 401; the front end and the rear end of the adjusting bidirectional screw rod 401 are respectively fixedly connected with a knob 402; the front part of the upper side and the rear part of the upper side of the back plate 5 are respectively connected with a sliding fixing plate 403 in a sliding way; the two sliding fixing plates 403 are respectively in threaded connection with the front end and the rear end of the adjusting bidirectional screw rod 401; a plurality of push plates 404 are welded on the left sides of the four sliding fixing plates 403; the outer end of each pusher plate 404 is provided with a barb structure.
The base fabric is laid on the display stand 1 and the back plate 5, and the concave parts of the fold areas of the base fabric are manually aligned with the barb parts of the push plates 404, the light transmission unit, the light and shadow transformation unit and the aperture accumulation unit adjust the light, the knob 402 is rotated manually to drive the bidirectional adjusting screw 401 to rotate, so that the bidirectional adjusting screw 401 drives the two sliding fixing plates 403 to move towards each other along the back plate 5, meanwhile, the base fabric laid above the back plate 5 is clamped between the upper sides of the two sliding fixing plates 403, so that the folds on the base fabric are clamped by the barb parts on the push plate 404, the tightness degree is controlled, and then when the displayed object is replaced, the knob 402 is only needed to be manually rotated, the clamping tightness of the two sliding fixing plates 403 to the base fabric on the back plate 5 is adjusted by adjusting the distance between the two sliding fixing plates 403, so that the purpose of tightness adjustment of the wrinkles on the bottom is achieved.
Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (9)
1. A three-dimensional art teaching display device with changeable light and shadow comprises a display stand (1), an electric turntable (2), a support rod (3), an electric rotating shaft (4) and a back plate (5); the lower side of the display platform (1) is connected with an electric turntable (2); a supporting rod (3) is fixedly connected to the left side of the electric turntable (2); the upper part of the left side of the supporting rod (3) is connected with an electric rotating shaft (4); a back plate (5) is fixedly connected to the right side of the display platform (1); the method is characterized in that: the device also comprises a light transmission unit, a light and shadow conversion unit and a diaphragm accumulation unit; the electric rotating shaft (4) is connected with a light transmission unit for simulating sunlight; the middle side of the light transmission unit is connected with a light and shadow conversion unit for adjusting light and shadow; the right side of the light transmitting unit is connected with a diaphragm accumulating unit for intensively reducing the diaphragm; the light and shadow conversion unit is connected with the aperture accumulation unit;
the light transmission unit comprises a fixed frame (101), an electric roller body (102), a first straight gear (103), a first rotating shaft (104), a second rotating shaft (105), a second straight gear (106), a first spring telescopic rod (107), a transmission roller body (108) and a filter cloth (109); a fixed mount (101) is fixedly connected between the front end and the rear end of the electric rotating shaft (4); the upper part of the left side of the fixed frame (101) is connected with an electric roller body (102); the front end of the electric roller body (102) is fixedly connected with a first straight gear (103); a first rotating shaft (104) is fixedly connected to the lower part of the left side of the fixed frame (101); the upper part of the right side of the fixed frame (101) is rotatably connected with a second rotating shaft (105); the lower part of the right side of the fixed frame (101) is also rotatably connected with a second rotating shaft (105); the front ends of the two second rotating shafts (105) are respectively fixedly connected with a second straight gear (106); the second straight gear (106) positioned at the upper side is meshed with the first straight gear (103); two second straight gears (106) which are adjacent in the front and the back are meshed; the front ends and the rear ends of the two second rotating shafts (105) are respectively fixedly connected with a first spring telescopic rod (107); a transmission roller body (108) is rotatably connected between two front and back adjacent first spring telescopic rods (107); a filter cloth (109) is fixedly connected to the first rotating shaft (104); the filter cloth (109) bypasses the outer surfaces of the upper and lower transmission roller bodies (108) and is fixedly connected with the electric roller body (102); the fixed frame (101) and the two second rotating shafts (105) are connected with a light and shadow conversion unit; the fixed frame (101) and the second rotating shaft (105) are both connected with the aperture accumulating unit.
2. The three-dimensional art teaching display device of light and shadow transformation as claimed in claim 1, wherein: the lower part of the left side of the filter cloth (109) is provided with a first opening (109 a), and the first opening (109 a) is of a transverse rectangular structure.
3. The three-dimensional art teaching display device of light and shadow transformation as claimed in claim 1, wherein: the lower part of the left side of the filter cloth (109) is provided with a second opening (109 b), the second opening (109 b) is positioned above the first opening (109 a), and the first opening (109 a) is of a circular structure.
4. The three-dimensional art teaching display device of light and shadow transformation as claimed in any one of claims 1 to 3, wherein: the light and shadow transformation unit comprises a side plate (201), a lifting slide block (202), a second spring telescopic rod (203), a fixing rod (204), an electric two-way screw rod (205), a transverse slide block (206), a light barrier (207) and a bulb (208); two side plates (201) are fixedly connected to the right side of the fixed frame (101); the upper side and the lower side of the two side plates (201) are respectively connected with a lifting slide block (202) in a sliding way; a second spring telescopic rod (203) is respectively and rotatably connected between the outer sides of the four lifting slide blocks (202) and the adjacent second rotating shafts (105) through rotating shafts; a fixed rod (204) is fixedly connected between the inner sides of two groups of front and back adjacent lifting slide blocks (202); the inner sides of the two fixing rods (204) are respectively connected with an electric bidirectional screw rod (205); the inner front side and the inner rear side of the two fixing rods (204) are respectively connected with a transverse sliding block (206) in a sliding way; the four transverse sliding blocks (206) are respectively connected with an adjacent electric bidirectional screw rod (205); one sides of the four transverse sliding blocks (206) close to the second rotating shaft (105) are fixedly connected with a light barrier (207) respectively; one side of each of the four light barriers (207) close to the second rotating shaft (105) is fixedly connected with a bulb (208).
5. The three-dimensional art teaching display device of light and shadow transformation as claimed in claim 1, wherein: the aperture accumulating unit comprises a first fixed block (301), a first electric telescopic part (302), a light-gathering shell (303) and a dimming assembly; a first fixed block (301) is fixedly connected to the middle side of the fixed frame (101); the upper side and the lower side of the first fixed block (301) are respectively connected with two second rotating shafts (105) in a rotating way; a first electric telescopic part (302) is fixedly connected to the right side of the first fixed block (301); a light-gathering shell (303) is fixedly connected to the right side of the first electric telescopic part (302); the right side of the light-gathering shell (303) is connected with a dimming component.
6. The three-dimensional art teaching display device of light and shadow transformation as claimed in claim 5, wherein: the dimming component comprises a second electric telescopic part (304), a second fixed block (305), a push ring (306), a convex lens (307), a wedge-shaped sliding block (308), a wedge-shaped fixed block (309), a first light blocking sheet (310) and a second light blocking sheet (311); a second electric telescopic part (304) is fixedly connected to the front part of the right side of the light-gathering shell (303) and the rear part of the right side of the light-gathering shell; the telescopic ends of the two second electric telescopic parts (304) are respectively fixedly connected with a second fixed block (305); a push ring (306) is fixedly connected between the left sides of the two second fixed blocks (305); a convex lens (307) is fixedly connected between the right sides of the two second fixed blocks (305); eight wedge-shaped sliding blocks (308) are connected around the right side surface of the light gathering shell (303) in a sliding manner; the right sides of the eight wedge-shaped sliding blocks (308) are fixedly connected with a wedge-shaped fixed block (309); the left sides of the eight wedge-shaped sliding blocks (308) are tightly attached to the push ring (306); the right sides of the eight wedge-shaped fixing blocks (309) are tightly attached to the convex lens (307); the right sides of the four wedge-shaped sliding blocks (308) are fixedly connected with a first light blocking sheet (310), the right sides of the four wedge-shaped sliding blocks (308) are fixedly connected with a second light blocking sheet (311), the first light blocking sheet (310) and the second light blocking sheet (311) are alternately arranged, and the four second light blocking sheets (311) are respectively positioned on the right sides of the four first light blocking sheets (310).
7. The three-dimensional art teaching display device of light and shadow transformation as claimed in claim 6, wherein: four slots corresponding to the light barrier (207) are arranged around the left ring surface of the light gathering shell (303).
8. The three-dimensional art teaching display device of light and shadow transformation as claimed in claim 6, wherein: the base cloth adjusting unit is arranged on the back plate (5) and comprises an adjusting bidirectional screw rod (401), a knob (402), a sliding fixing plate (403) and a push plate (404); the upper side of the back plate (5) is rotatably connected with an adjusting bidirectional screw rod (401); the front end and the rear end of the adjusting bidirectional screw rod (401) are respectively fixedly connected with a knob (402); the front part of the upper side and the rear part of the upper side of the back plate (5) are respectively connected with a sliding fixing plate (403) in a sliding way; the two sliding fixing plates (403) are respectively connected with the front end and the rear end of the adjusting bidirectional screw rod (401); a plurality of push plates (404) are fixedly connected to the left sides of the four sliding fixing plates (403).
9. The three-dimensional art teaching display device of light and shadow transformation as claimed in claim 8, wherein: the outer end of each push plate (404) is provided with a barb structure.
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