CN113433780A - Teaching demonstration ware suitable for electronic technology uses - Google Patents
Teaching demonstration ware suitable for electronic technology uses Download PDFInfo
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- CN113433780A CN113433780A CN202110531321.4A CN202110531321A CN113433780A CN 113433780 A CN113433780 A CN 113433780A CN 202110531321 A CN202110531321 A CN 202110531321A CN 113433780 A CN113433780 A CN 113433780A
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- exhaust
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cleaning In General (AREA)
- Induction Heating Cooking Devices (AREA)
Abstract
The invention provides a teaching demonstration device suitable for electronic technology application, which structurally comprises: the invention is characterized in that the control end, the machine body, the protective cover and the bottom foot are embedded in the inner side of the machine body, the machine body and the protective cover are of an integrated structure, the upper end surface of the bottom foot is welded with the lower end surface of the machine body, the air in the fixed cavity can flow into the exhaust device under the action of the fan, the air pushes the movable plate to move upwards, the gas can be discharged to the exhaust cavity through the through hole, when the gas enters the exhaust cavity, the gas flows into the auxiliary cavity through the inner side of the movable cavity and acts on the lower end of the supporting plate, so that the supporting plate is pushed to move upwards, because the supporting plate is movably clamped with the auxiliary plate, and the auxiliary plate is movably clamped with the mounting block, the supporting plate drives the auxiliary plate to be splayed, then gaseous can carry out the diffusion in different positions through the gas vent in the accessory plate, avoids the unable phenomenon that drops of dust at demonstration appearance outer wall border.
Description
Technical Field
The invention relates to the field of teaching equipment, in particular to a teaching demonstration device suitable for electronic technology application.
Background
Along with the development of society, the education level improves constantly, in the electronic technology application experiment, when to acoustic control and light-operated circuit teaching, give first place to classroom teaching, can't demonstrate directly perceived, comprehensively, therefore most carry out supplementary teaching through the demonstrator, can directly perceivedly, accurately reflect the automatic control effect of acoustic control circuit and light-operated circuit in the electronic circuit, then can be convenient for understand, but the teaching demonstrator who is applicable to electronic technology among the prior art uses, because the demonstrator exhaust hole is established at the inner wall of demonstrator, and be located the side position of demonstrator, then the air current acts on the surface outer wall of demonstrator perpendicularly, and the effort that receives the air current at demonstrator outer wall border is less, cause the dust that leans on the border can not drop in time, lead to the fact the picture that the demonstrator shows to show definition to reduce.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a teaching demonstrator suitable for electronic technology application, wherein the demonstrator exhaust holes are arranged on the inner wall of the demonstrator and are positioned on the side surface of the demonstrator, so that airflow vertically acts on the outer wall of the surface of the demonstrator, and the edge of the outer wall of the demonstrator is subjected to smaller acting force of the airflow, so that dust close to the edge cannot fall off in time, and the problem of reduction of the definition of the image projected by the demonstrator is caused.
In order to achieve the purpose, the invention is realized by the following technical scheme: a teaching demonstration device suitable for electronic technology application, the structure includes: the rear end of the control end is embedded into the inner side of the machine body, the machine body and the protective cover are of an integrated structure, and the upper end surface of the footing is welded with the lower end surface of the machine body;
the fuselage includes demonstration appearance, connecting device, bolt, back lid, the demonstration appearance is installed in the inboard of fuselage, connecting device's one end is embedded in the inboard of fuselage, the back lid passes through bolted mounting in connecting device's right-hand member.
Preferably, the connecting device comprises an exhaust device, a fixed cavity, a mounting hole and a fan, the right end of the exhaust device is embedded into the inner side of the fixed cavity, the right end of the exhaust device is connected with the fan in a nested mode, the inner side of the fixed cavity is detachably mounted with the demonstration instrument, the mounting hole and the fixed cavity are of an integrated structure, the fan is fixedly mounted on the inner side of the fixed cavity, and the exhaust device is symmetrically distributed on two sides of the fixed cavity.
Preferably, the exhaust device comprises an exhaust pipe, an exhaust cavity, an elastic spring, a through hole and a movable plate, the upper end of the exhaust pipe is connected with the inner side of the exhaust cavity in a nested manner, the lower end face of the exhaust cavity is connected with the upper end of the elastic spring through a bolt, the lower end face of the elastic spring is fixedly connected with the upper end face of the movable plate, the through hole and the movable plate are of an integrated structure, a groove is formed in the exhaust pipe, and when the movable plate moves to the topmost end, the groove is communicated with the through hole.
Preferably, the exhaust chamber includes mobile device, activity chamber, exhaust hole, connecting plate, mobile device's lower extreme and the upper end in activity chamber are connected with inlaying, the lower extreme in activity chamber runs through with the connecting plate mutually, exhaust hole and exhaust chamber structure as an organic whole, sliding connection is carried out with the inboard in exhaust chamber to the both sides of connecting plate, mobile device evenly distributed is in exhaust chamber, and is equipped with 5 altogether.
Preferably, the moving device comprises a swinging device, an auxiliary cavity and a connecting rod, the lower end of the swinging device is fixedly connected with the upper end of the connecting rod, the auxiliary cavity and the exhaust cavity are of an integrated structure, the lower end of the connecting rod is in threaded connection with the inner side of the movable cavity, and the swinging device and the connecting rod are located on the same axis.
Preferably, the swing device includes a center shaft, an exhaust port, a mounting block, a support plate, and an auxiliary plate, wherein an outer ring of the center shaft is fitted into an inner side of the mounting block, the exhaust port and the auxiliary plate are integrally formed, a lower end of the mounting block is slidably coupled to an inner side of the exhaust chamber, the support plate is movably mounted between the auxiliary plates through the center shaft, an inner side of an upper end of the auxiliary plate is movably engaged with the outer ring of the center shaft, the auxiliary plate is in a straight shape when the mounting block moves to an inner top end, and the auxiliary plate is in a splayed shape when the mounting block moves to an outer top end.
As preferred, the activity chamber includes limiting plate, well pole, movable block, U type groove, arc pole, the inner ring of limiting plate is nested mutually with the outer loop of movable block, the upper end of well pole is embedded in the inboard in U type groove, U type groove and activity chamber structure as an organic whole, the arc pole symmetry is installed in the both sides of limiting plate, and the lower extreme embedding of arc pole is in the inboard of connecting plate, well pole is the spring steel material of wearing.
As preferred, the movable block includes screw hole, shell, mounting panel, bracing piece, location axle, screw hole and location axle structure as an organic whole, the outer loop of shell carries out nested connection with the inner ring of mounting panel, the location axle is installed in the inboard of shell through the bracing piece, location axle and activity chamber are located the same axis, and the lower extreme of location axle carries out interference fit with the inboard in activity chamber.
Compared with the prior art, the invention has the following advantagesAdvantageous effects：
1. In the process of demonstrating the demonstration instrument, the gas in the fixed cavity can flow into the exhaust device under the action of the fan, the gas pushes the movable plate to move upwards, the gas can be discharged to the exhaust cavity through the through hole, when the gas enters the exhaust cavity, the gas flows into the auxiliary cavity through the inner side of the movable cavity and acts on the lower end of the supporting plate, so that the supporting plate is pushed to move upwards, the auxiliary plate is movably clamped with the auxiliary plate, the auxiliary plate is movably clamped with the mounting block, the supporting plate drives the auxiliary plate to be splayed, the gas can diffuse in different directions through the exhaust hole in the auxiliary plate, and the phenomenon that dust at the edge of the outer wall of the demonstration instrument cannot fall is avoided.
2. The lower end of the connecting plate is continuously pushed by gas, so that the connecting plate moves upwards in the exhaust cavity, the limiting plate is driven to move when the connecting plate moves, the limiting plate is connected with the movable block in a matched mode, the movable block continuously moves upwards, gas can be discharged through the inner side of the shell, the arc-shaped rod extrudes the centering penetrating rod in the upward moving process of the movable block, and the centering penetrating rod is made of spring steel, so that the connecting plate is pushed to be restored to the original state under the action of the centering penetrating rod and the gravity of the connecting plate under the action of the center penetrating rod when the device stops operating, the lower end of the positioning shaft is in interference fit with the inner side of the movable cavity, the gas tightness of the bottom end of the movable block is improved, and the gas is prevented from being blown through the bottom of the movable block.
Drawings
Fig. 1 is a schematic structural diagram of a teaching demonstration device suitable for electronic technology application.
Fig. 2 is a schematic cross-sectional structure of the fuselage side view of the present invention.
Fig. 3 is a schematic cross-sectional structure of the connecting device of the present invention.
Fig. 4 is a schematic structural view of an exhaust apparatus portion of the present invention.
FIG. 5 is a schematic view of the exhaust chamber according to the present invention.
Fig. 6 is a partially enlarged schematic structural diagram of the mobile device of the present invention.
Fig. 7 is a schematic cross-sectional structure of the oscillating device of the present invention.
Fig. 8 is a schematic structural view of the movable chamber of the present invention.
Fig. 9 is a schematic structural diagram of the movable block of the present invention.
In the figure: control end-1, machine body-2, protective cover-3, foot-4, demonstration instrument-21, connecting device-22, bolt-23, rear cover-24, exhaust device-221, fixed cavity-222, mounting hole-223, fan-224, exhaust pipe-211, exhaust cavity-212, elastic spring-213, through hole-214, moving plate-215, moving device-121, movable cavity-122, exhaust hole-123, connecting plate-124, swinging device-a 1, auxiliary cavity-a 2, connecting rod-a 3, central shaft-b 1, exhaust port-b 2, mounting block-b 3, supporting plate-b 4, auxiliary plate-b 5, limiting plate-21 a, middle through rod-22 a, movable block-23 a, connecting rod-b 5, auxiliary plate-b 5, limiting plate-21 a, middle through rod-22 a, movable block-23 a, A U-shaped groove-24 a, an arc-shaped rod-25 a, a threaded hole-231, a shell-232, a mounting plate-233, a support rod-234 and a positioning shaft-235.
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.
Example 1
As shown in figures 1 to 7:
the invention provides a teaching demonstration device suitable for electronic technology application, which structurally comprises: control end 1, fuselage 2, protection casing 3, footing 4, the rear end of control end 1 imbeds in the inboard of fuselage 2, fuselage 2 and protection casing 3 structure as an organic whole, the up end of footing 4 welds with the lower terminal surface of fuselage 2 mutually.
The demonstration instrument 21 is installed on the inner side of the machine body 2, one end of the connecting device 22 is embedded into the inner side of the machine body 2, and the rear cover 24 is installed at the right end of the connecting device 22 through the bolt 23.
The connecting device 22 comprises an exhaust device 221, a fixed cavity 222, a mounting hole 223 and a fan 224, the right end of the exhaust device 221 is embedded into the inner side of the fixed cavity 222 and is connected with the fan 224 in a nested manner, the inner side of the fixed cavity 222 is detachably mounted with the demonstration instrument 21, the mounting hole 223 and the fixed cavity 222 are of an integrated structure, the fan 224 is fixedly mounted on the inner side of the fixed cavity 222, and the exhaust device 221 is symmetrically distributed on two sides of the fixed cavity 222, so that dust on the surface of the demonstration instrument 21 can be effectively blown.
The exhaust device 221 includes an exhaust pipe 211, an exhaust cavity 212, an elastic spring 213, a through hole 214, and a moving plate 215, an upper end of the exhaust pipe 211 is nested and connected with an inner side of the exhaust cavity 212, a lower end surface of the exhaust cavity 212 is connected with an upper end of the elastic spring 213 by a bolt, a lower end surface of the elastic spring 213 is fixedly connected with an upper end surface of the moving plate 215, the through hole 214 and the moving plate 215 are integrated, a groove is formed in the exhaust pipe 211, and when the moving plate 215 moves to the topmost end, the groove is communicated with the through hole 214, so that gas in the exhaust pipe 211 can flow into the exhaust cavity 212.
Wherein, exhaust chamber 212 includes mobile device 121, activity chamber 122, exhaust hole 123, connecting plate 124, mobile device 121's lower extreme and activity chamber 122's upper end are embedded and are connected, activity chamber 122's lower extreme and connecting plate 124 pass through mutually, exhaust hole 123 and exhaust chamber 212 structure as an organic whole, sliding connection is carried out with the inboard in exhaust chamber 212 to the both sides of connecting plate 124, mobile device 121 evenly distributed is in exhaust chamber 212, and is equipped with 5 altogether, then can diffuse gaseous emission, is favorable to blowing the dust on demonstration appearance 21 surface.
The moving device 121 includes a swinging device a1, an auxiliary chamber a2, and a connecting rod a3, the lower end of the swinging device a1 is fixedly connected to the upper end of the connecting rod a3, the auxiliary chamber a2 and the exhaust chamber 212 are integrated, the lower end of the connecting rod a3 is in threaded connection with the inner side of the movable chamber 122, the swinging device a1 and the connecting rod a3 are located on the same axis, and the swinging device a1 can swing under the driving of the connecting rod a 3.
The swinging device a1 comprises a central shaft b1, an air outlet b2, a mounting block b3, a supporting plate b4 and an auxiliary plate b5, wherein the outer ring of the central shaft b1 is embedded inside the mounting block b3, the air outlet b2 and the auxiliary plate b5 are of an integrated structure, the lower end of the mounting block b3 is in sliding connection with the inside of the air outlet cavity 212, the supporting plate b4 is movably mounted between the auxiliary plates b5 through the central shaft b1, the inner side of the upper end of the auxiliary plate b5 is movably engaged with the outer ring of the central shaft b1, the auxiliary plate b5 is in a straight shape when the mounting block b3 moves to the inner top end, so that impurities are prevented from entering the auxiliary cavity a2, and the auxiliary plate b5 is in an eight shape when the mounting block b3 moves to the outer top end, so that the air outlet b2 of the auxiliary plate b5 can be blown away in different directions.
The specific use mode and function of the embodiment are as follows:
the invention starts the demonstration instrument 21 in the machine body 2 by operating the control end 1, thereby demonstrating the motion state of the object, in the process of demonstrating the demonstration instrument 21, the demonstration instrument 21 self continuously emits hot air, so that the gas in the fixed cavity 222 gradually increases, then the control end 1 is operated, so that the fan 224 starts, because the fan 224 is arranged at the inner side of the fixed cavity 222, and the left side of the fan 224 is provided with the exhaust device 221, the gas in the fixed cavity 222 can flow to the inner part of the exhaust device 221 under the action of the fan 224, and along with the increase of the gas, the gas pushes the movable plate 215 to move upwards, when the movable plate 215 moves to the top end, the groove in the exhaust pipe 211 is communicated with the through hole 214 in the movable plate 215, so that the gas can be discharged to the exhaust cavity 212 through the through hole 214, and when the movable plate 215 moves to the top end, the elastic spring 213 is squeezed, so that when the device stops operating, the movable plate 215 can be driven by the elastic spring 213 to restore, and the phenomenon that air is mixed with water vapor and enters the device in a humid day is avoided, when air enters the exhaust cavity 213, the air flows into the auxiliary cavity a2 through the inner side of the movable cavity 122, so that the air acts on the lower end of the supporting plate b4, so as to push the supporting plate b4 to move upwards, because the supporting plate b4 is movably clamped with the auxiliary plate b5, and the auxiliary plate b5 is movably clamped with the mounting block b3, so that the supporting plate b4 drives the auxiliary plate b5 to be splayed, the air can diffuse in different directions through the exhaust port b2 in the auxiliary plate b5, so that the phenomenon that dust on the edge of the outer wall of the demonstration instrument 21 can not fall off can be avoided, and when the device stops operating, the supporting plate b4 can restore, the auxiliary plate b5 is driven to rotate around the central shaft b1, and the auxiliary board b5 pulls the mounting block b3 to move, when the mounting block b3 moves to the top of the inner side, the auxiliary board b5 is in a straight line shape, and impurities and the like are prevented from entering the inner side of the auxiliary cavity a 2.
Example 2
As shown in fig. 5: exhaust chamber 212 includes mobile device 121, activity chamber 122, exhaust hole 123, connecting plate 124, mobile device 121's lower extreme and activity chamber 122's upper end are embedded and are connected, activity chamber 122's lower extreme and connecting plate 124 pass through mutually, exhaust hole 123 and exhaust chamber 212 structure as an organic whole, sliding connection is carried out with the inboard of exhaust chamber 212 in the both sides of connecting plate 124, mobile device 121 evenly distributed is in exhaust chamber 212, and is equipped with 5 altogether, then can diffuse gaseous emission, is favorable to blowing the dust on demonstration appearance 21 surface.
As shown in fig. 8 to 9:
the invention provides a teaching demonstration device suitable for electronic technology application, wherein a movable cavity 122 comprises a limiting plate 21a, a middle penetrating rod 22a, a movable block 23a, a U-shaped groove 24a and an arc-shaped rod 25a, an inner ring of the limiting plate 21a is nested with an outer ring of the movable block 23a, the upper end of the middle penetrating rod 22a is embedded into the inner side of the U-shaped groove 24a, the U-shaped groove 24a and the movable cavity 122 are of an integrated structure, the arc-shaped rods 25a are symmetrically arranged on two sides of the limiting plate 21a, the lower ends of the arc-shaped rods 25a are embedded into the inner side of a connecting plate 124, and the middle penetrating rod 22a is made of spring steel and can push the middle penetrating rod 22a to move.
Wherein, the movable block 23a includes screw hole 231, shell 232, mounting panel 233, bracing piece 234, location axle 235, screw hole 231 and location axle 235 structure as an organic whole, the outer loop of shell 232 carries out nested connection with the inner ring of mounting panel 233, location axle 235 is installed in the inboard of shell 232 through bracing piece 234, location axle 235 is located same axis with activity chamber 122, and the lower extreme of location axle 235 carries out interference fit with the inboard of activity chamber 122 to increase the gas tightness of movable block 23a bottom, avoid gas to blow through movable block 23a bottom.
The specific use mode and function of the embodiment are as follows:
in the process of operating the equipment, the air continuously acts with the fan 224, the air enters the inner side of the exhaust cavity 212, and the air continuously increases, so that the air continuously pushes the lower end of the connecting plate 124, the connecting plate 124 moves upwards in the exhaust cavity 212, the connecting plate 124 is fixedly connected with the arc-shaped rods 25a, and the arc-shaped rods 25a are symmetrically distributed on two sides of the limiting plate 21a, so that the limiting plate 21a is driven to move when the connecting plate 124 moves, the movable block 23a continuously moves upwards as the limiting plate 21a is matched and connected with the movable block 23a, so that the air can be discharged through the inner side of the shell 232, and in the process of moving the movable block 23a upwards, the arc-shaped rods 25a press the centering rods 22a, and the centering rods 22a are made of spring steel, so that when the equipment stops operating, under the effect of well penetrating rod 22a and the gravity of connecting plate 124 self, will promote connecting plate 124 reconversion, then the lower extreme of location axle 235 carries out interference fit with the inboard of activity chamber 122 to increase the gas tightness of activity piece 23a bottom, avoid gaseous through the activity piece 23a bottom to blow.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. A teaching demonstration device suitable for electronic technology application, the structure includes: control end (1), fuselage (2), protection casing (3), footing (4), the rear end of control end (1) is embedded in the inboard of fuselage (2), fuselage (2) and protection casing (3) structure as an organic whole, the up end of footing (4) welds its characterized in that with the lower terminal surface of fuselage (2):
fuselage (2) are including demonstration appearance (21), connecting device (22), bolt (23), back lid (24), demonstration appearance (21) are installed in the inboard of fuselage (2), the inboard in fuselage (2) is embedded into to the one end of connecting device (22), back lid (24) are installed in the right-hand member of connecting device (22) through bolt (23).
2. An instructional demonstrator adapted for use in electronic technology applications according to claim 1, wherein: the connecting device (22) comprises an exhaust device (221), a fixed cavity (222), a mounting hole (223) and a fan (224), the right end of the exhaust device (221) is embedded into the inner side of the fixed cavity (222), the right end of the exhaust device is connected with the fan (224) in a nested mode, the inner side of the fixed cavity (222) is detachably mounted with the demonstration instrument (21), the mounting hole (223) and the fixed cavity (222) are of an integrated structure, and the fan (224) is fixedly mounted on the inner side of the fixed cavity (222).
3. An instructional demonstrator adapted for use in electronic technology applications according to claim 2, wherein: exhaust apparatus (221) includes exhaust pipe (211), exhaust chamber (212), elastic spring (213), through-hole (214), movable plate (215), nested connection is carried out with the inboard in exhaust chamber (212) to the upper end of exhaust pipe (211), bolted connection is carried out with the upper end of elastic spring (213) to the lower terminal surface in exhaust chamber (212), fixed connection is carried out with the up end of movable plate (215) to the lower terminal surface of elastic spring (213), through-hole (214) and movable plate (215) structure as an organic whole.
4. A teaching demonstration device adapted for use in electronic technology applications according to claim 3 wherein: exhaust chamber (212) include mobile device (121), activity chamber (122), exhaust hole (123), connecting plate (124), the lower extreme of mobile device (121) is connected with the upper end of activity chamber (122) is embedded firmly, the lower extreme and the connecting plate (124) of activity chamber (122) run through mutually, exhaust hole (123) and exhaust chamber (212) structure as an organic whole, sliding connection is carried out with the inboard in exhaust chamber (212) to the both sides of connecting plate (124).
5. An instructional demonstrator adapted for use in electronic technology applications according to claim 4, wherein: the moving device (121) comprises a swinging device (a 1), an auxiliary cavity (a 2) and a connecting rod (a 3), the lower end of the swinging device (a 1) is fixedly connected with the upper end of the connecting rod (a 3), the auxiliary cavity (a 2) and the exhaust cavity (212) are of an integrated structure, and the lower end of the connecting rod (a 3) is in threaded connection with the inner side of the movable cavity (122).
6. An instructional demonstrator adapted for use in electronic technology applications according to claim 5, wherein: the swing device (a 1) comprises a central shaft (b 1), an air outlet (b 2), a mounting block (b 3), a support plate (b 4) and an auxiliary plate (b 5), wherein the outer ring of the central shaft (b 1) is embedded in the mounting block (b 3), the air outlet (b 2) and the auxiliary plate (b 5) are in an integrated structure, the lower end of the mounting block (b 3) is in sliding connection with the inner side of an air exhaust cavity (212), the support plate (b 4) is movably mounted between the auxiliary plates (b 5) through the central shaft (b 1), and the inner side of the upper end of the auxiliary plate (b 5) is movably engaged with the outer ring of the central shaft (b 1).
7. An instructional demonstrator adapted for use in electronic technology applications according to claim 4, wherein: activity chamber (122) include limiting plate (21 a), well wear pole (22 a), movable block (23 a), U type groove (24 a), arc pole (25 a), the inner ring of limiting plate (21 a) is nested mutually with the outer loop of movable block (23 a), the upper end of well wearing pole (22 a) is embedded in the inboard in U type groove (24 a), U type groove (24 a) and activity chamber (122) structure as an organic whole, arc pole (25 a) symmetry is installed in the both sides of limiting plate (21 a), and the lower extreme embedding of arc pole (25 a) is in the inboard of connecting plate (124).
8. An instructional presenter adapted for use in electronic technology applications according to claim 7 wherein: the movable block (23 a) comprises a threaded hole (231), a shell (232), a mounting plate (233), a supporting rod (234) and a positioning shaft (235), the threaded hole (231) and the positioning shaft (235) are of an integrated structure, the outer ring of the shell (232) is connected with the inner ring of the mounting plate (233) in a nesting mode, and the positioning shaft (235) is mounted on the inner side of the shell (232) through the supporting rod (234).
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| CN202110531321.4A CN113433780B (en) | 2021-05-17 | 2021-05-17 | Teaching demonstration ware suitable for electronic technology uses |
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| CN202110531321.4A CN113433780B (en) | 2021-05-17 | 2021-05-17 | Teaching demonstration ware suitable for electronic technology uses |
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| CN110675662A (en) * | 2019-10-15 | 2020-01-10 | 许昌学院 | Digital media teaching presentation device |
| CN210465969U (en) * | 2019-10-15 | 2020-05-05 | 深圳市伟泰鑫实业有限公司 | Projector with built-in dustproof mechanism |
| CN211143060U (en) * | 2019-11-26 | 2020-07-31 | 中建二局第二建筑工程有限公司 | Embedded structure of pile foundation for construction engineering construction |
| CN211529402U (en) * | 2020-01-16 | 2020-09-18 | 济南职业学院 | Dust protected teaching demonstration appearance |
| CN212966574U (en) * | 2020-09-15 | 2021-04-13 | 王冠 | School is with internet education with teaching display device |
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