A teaching projection device

Abstract

The utility model discloses a teaching projection device, including a base, an electric push rod is fixedly installed in the middle of the base, a mounting block is fixedly connected to the upper end of the electric push rod, a rotating shaft is rotatably connected to the middle of the mounting block, one end of the rotating shaft is fixedly connected to a writing base plate, and a plug-in component for fixing its rotation angle is provided at the other end of the rotating shaft. The writing base plate is rotated to a horizontal state by the rotating shaft, and then the writing side plate is rotated to an unfolded state, and the gap between the two plates is fixed and narrowed and hidden by a bolt connector. When projection is required, the curtain is pulled down so that the curtain is stretched flat on the surfaces of the two plates for projection. At the same time, when writing is required in the projected picture, the curtain is rolled up so that the picture is projected on the stretched surface of the plate body for writing. The whole operation process is quick and convenient, and a large number of gaps are avoided, thereby improving the viewing and writing effects.

Description

Technical Field

[0001] The utility model relates to the technical field of projection equipment, in particular to a teaching projection equipment. Background Art

[0002] Multimedia teaching refers to the process of teaching, in which, according to the teaching objectives and the characteristics of the teaching objects, modern teaching media are rationally selected and used through teaching design, and organically combined with traditional teaching methods, so as to jointly participate in the whole teaching process, act on students with a variety of media information, form a reasonable teaching process structure, and achieve the optimal teaching effect.

[0003] The patent with announcement number CN214847165U discloses a multimedia teaching projection device, including a cylinder, a rolling assembly, a reciprocating assembly and a reinforcement assembly. The rolling assembly is arranged in the cylinder, the reciprocating assembly is arranged on the top of the cylinder, and the reinforcement assembly is arranged on the rolling assembly. The projection board replaces the projection screen to facilitate teachers to circle and mark the projection content, and it is convenient to write and erase. The projection board can also be rolled up like a projection screen through the rolling assembly, without taking up extra space.

[0004] The above-mentioned device integrates the projection screen and the writing board on a board body. In actual use, since the board body is composed of multiple slats, there will be multiple gaps whether projecting or writing on its surface, which affects the viewing and writing effects and is not practical. Utility Model Content

[0005] The purpose of the present invention is to provide a teaching projection device in order to solve the above problems, as described below.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a teaching projection device, including a base, an electric push rod is fixedly installed in the middle of the base, the upper end of the electric push rod is fixedly connected to a mounting block, the middle of the mounting block is rotatably connected to a rotating shaft, one end of the rotating shaft is fixedly connected to a writing base plate, and the other end of the rotating shaft is provided with a plug-in component for fixing its rotation angle, one side of the writing base plate is rotatably connected to a writing side plate, both sides of the writing side plate are set as writing surfaces, both sides of the surface of the writing base plate are provided with a clamping structure for fixing the writing side plate to a folded state, and both sides of the end of the writing base plate are provided with bolt connectors for fixing the writing side plate to an extended state, both sides of the writing base plate are fixedly connected to ear plates, a roller is rotatably connected between the two ear plates, and a curtain is fixed and rolled up on the roller.

[0008] When using the above-mentioned teaching projection equipment, the base is placed in a suitable position, and then the mounting block is driven to rise to the viewing position by the electric push rod. Writing is performed on the surface of the folded writing side panel as needed. When writing on a large area is required, the writing base plate is first rotated to a horizontal state by the rotating shaft, and then the writing side panel is rotated to an unfolded state, and fixed and the gap between the two panels is narrowed and hidden by bolt connectors. When projection is required, the screen is pulled down so that the screen is stretched flat on the surfaces of the two panels for projection. At the same time, when writing is required in the projected picture, the screen is rolled up so that the picture is projected on the stretched panel surface and writing can be performed.

[0009] Preferably, the plug-in assembly comprises a latch sleeve fixedly connected to the end of the rotating shaft, a latch is inserted in the latch sleeve, and two positioning holes for plugging with the latch are provided on the mounting block, and the two positioning holes are respectively located in the vertical and horizontal directions.

[0010] Preferably, a magnetic plate is fixedly connected to the end of the latch, and the magnetic plate is magnetically connected to the iron latch sleeve.

[0011] Preferably, a plurality of grooves are provided on the end surface of the writing base plate, each of the grooves is connected to an elastic band, a plurality of protrusions corresponding to the grooves are fixedly connected to the end surface of the writing side plate, and the other end of the elastic band is fixedly connected to the protrusion.

[0012] Preferably, the clamping structure comprises clamping plates fixedly connected to both sides of the surface of the writing base plate, and both sides of the writing side plates are provided with fixing grooves clamped to the clamping plates.

[0013] Preferably, the bolt connector includes a fixing block fixedly connected to the end of the writing base plate, a bolt is rotatably connected to the fixing block, and a nut threadedly connected to the bolt is fixedly connected to the end of the writing side plate.

[0014] Preferably, the two ear plates are fixedly connected with pipe clamps, the ends of the curtain are fixedly connected with fixing rods clamped with the pipe clamps, and both ends of the fixing rods are fixedly connected with end plates, and the fixing rods are designed as counterweights.

[0015] Preferably, universal wheels are fixedly mounted at the four corners of the bottom surface of the base, and a locking structure is provided on the universal wheels.

[0016] The beneficial effects are:

[0017] The writing bottom plate is rotated to a horizontal state through the rotating shaft, and then the writing side plate is rotated to an unfolded state, and fixed and the gap between the two plates is narrowed and hidden through bolt connectors. When projection is required, the screen is pulled down to stretch the screen flat on the surfaces of the two plates for projection. At the same time, when writing is required in the projected picture, the screen is rolled up to project the picture on the stretched surface of the plate and writing can be carried out. The whole operation process is quick and convenient, and a large number of gaps are avoided, thereby improving the viewing and writing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is the first stereogram of the utility model;

[0020] Figure 2 It is a three-dimensional diagram of the extended state of the writing side board of the utility model;

[0021] Figure 3 It is a second stereogram of the present utility model.

[0022] The following are the descriptions of the reference numerals:

[0023] 1. Base; 2. Electric push rod; 3. Plug-in assembly; 3a. Pin sleeve; 3b. Pin; 3c. Positioning hole; 3d. Magnetic plate; 4. Bolt connector; 4a. Fixing block; 4b. Bolt; 4c. Nut; 5. Mounting block; 6. Rotating shaft; 7. Writing base plate; 8. Writing side plate; 9. Ear plate; 10. Roller; 11. Curtain; 12. Groove; 13. Elastic band; 14. Bump; 15. Cardan; 16. Fixing groove; 17. Fixing rod; 18. Pipe clamp; 19. End plate; 20. Universal wheel. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0025] See also Figure 1-Figure 3As shown, the utility model provides a teaching projection device, including a base 1, an electric push rod 2 is fixedly installed in the middle of the base 1, the upper end of the electric push rod 2 is fixedly connected to a mounting block 5, the middle of the mounting block 5 is rotatably connected to a rotating shaft 6, one end of the rotating shaft 6 is fixedly connected to a writing base plate 7, and the other end of the rotating shaft 6 is provided with a plug-in component 3 for fixing its rotation angle, one side of the writing base plate 7 is rotatably connected to a writing side plate 8, both sides of the writing side plate 8 are set as writing surfaces, both sides of the surface of the writing base plate 7 are provided with a clamping structure for fixing the writing side plate 8 to a folded state, and both sides of the end of the writing base plate 7 are provided with bolt connectors 4 for fixing the writing side plate 8 to an extended state, both sides of the writing base plate 7 are fixedly connected to ear plates 9, a roller shaft 10 is rotatably connected between the two ear plates 9, and a curtain 11 is fixed and wound on the roller shaft 10.

[0026] Reference Figure 3 As shown, the plug-in assembly 3 includes a latch sleeve 3a fixedly connected to the end of the rotating shaft 6, a latch 3b is inserted in the latch sleeve 3a, and two positioning holes 3c plugged with the latch 3b are provided on the mounting block 5, and the two positioning holes 3c are respectively located in the vertical and horizontal directions, and a magnetic plate 3d is fixedly connected to the end of the latch 3b, and the magnetic plate 3d is magnetically connected to the iron latch sleeve 3a. When the rotating shaft 6 drives the latch sleeve 3a to rotate 90 degrees, the latch sleeve 3a is aligned with the other positioning hole 3c, and then the latch 3b is inserted into the latch sleeve 3a and the positioning hole 3c at the same time, completing the angle fixation of the rotating shaft 6 and the writing base plate 7, and at the same time, the magnetic plate 3d can prevent the latch 3b from falling off through magnetic force.

[0027] As an optional embodiment, a plurality of grooves 12 are provided on the end surface of the writing base plate 7, and an elastic band 13 is connected to each groove 12. A plurality of protrusions 14 corresponding to the grooves 12 are fixedly connected to the end surface of the writing side plate 8, and the other end of the elastic band 13 is fixedly connected to the protrusion 14. Under the elastic force of the elastic band 13, the writing side plate 8 can be driven to approach the end surface of the writing base plate 7, and the writing side plate 8 can be folded and rotated at the same time. When the protrusion 14 is inserted into the groove 12, the stability of the connection between the writing side plate 8 and the writing base plate 7 can be improved.

[0028] Reference Figure 2 As shown, the clamping structure includes a clamping plate 15 fixedly connected to both sides of the surface of the writing base plate 7, and fixing grooves 16 clamped with the clamping plate 15 are provided on both sides of the writing side plate 8. After the writing side plate 8 is folded, the clamping plate 15 can be clamped with the fixing groove 16 to fix the writing side plate 8 on the surface of the writing base plate 7.

[0029] As an optional embodiment, the bolt connector 4 includes a fixing block 4a fixedly connected to the end of the writing base plate 7, a bolt 4b is rotatably connected to the fixing block 4a, and a nut 4c threadedly connected to the bolt 4b is fixedly connected to the end of the writing side plate 8. When the writing side plate 8 is unfolded, the bolt 4b is docked with the nut 4c, and then the bolt 4b is moved in the nut 4c by rotating it, and the two plates are tightly fitted to reduce the gap between the two plates as much as possible, thereby improving the fixing, viewing and writing effects.

[0030] As an optional implementation, the two ear plates 9 are fixedly connected with pipe clamps 18, the ends of the curtain 11 are fixedly connected with fixing rods 17 clamped with the pipe clamps 18, and both ends of the fixing rods 17 are fixedly connected with end plates 19. The fixing rods 17 are designed as counterweights, and after the curtain 11 is rolled up, the fixing rods 17 can be clamped into the pipe clamps 18 to fix the rolled curtain 11. At the same time, the fixing rods 17 have their own weight, and after the curtain 11 is unfolded, the curtain 11 can be driven to be flattened by gravity, thereby improving the projection effect.

[0031] Specifically, universal wheels 20 are fixedly mounted at the four corners of the bottom surface of the base 1, and a locking structure is provided on the universal wheels 20, so that the device can be flexibly moved and braked and fixed through the locking structure.

[0032] With the above structure, when in use, the base 1 is placed in a suitable position, and then the mounting block 5 is driven to rise to the viewing position by the electric push rod 2, and writing is performed on the surface of the writing side plate 8 in the folded state as needed. When writing on a large area is required, the writing base plate 7 is first rotated to a horizontal state by the rotating shaft 6, and then the writing side plate 8 is rotated to an unfolded state, and the bolt connector 4 is used to fix and narrow the gap between the two plates to hide them. When projection is required, the curtain 11 is pulled down so that the curtain 11 is stretched flat on the surfaces of the two plates for projection. At the same time, when writing is required in the projected picture, the curtain 11 is rolled up so that the picture is projected on the stretched surface of the plate and writing can be performed.

[0033] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A teaching projection device, characterized in that: The invention comprises a base (1), wherein an electric push rod (2) is fixedly installed in the middle of the base (1), an upper end of the electric push rod (2) is fixedly connected to a mounting block (5), a rotating shaft (6) is rotatably connected to the middle of the mounting block (5), one end of the rotating shaft (6) is fixedly connected to a writing base plate (7), and the other end of the rotating shaft (6) is provided with a plug-in assembly (3) for fixing its rotation angle, one side of the writing base plate (7) is rotatably connected to a writing side plate (8), and the writing side plate (8) is rotatably connected to the writing base plate (7). ) are both set as writing surfaces, both sides of the surface of the writing base plate (7) are provided with a clamping structure for fixing the writing side plate (8) to a folded state, and both sides of the end of the writing base plate (7) are provided with bolt connectors (4) for fixing the writing side plate (8) to an extended state, and both sides of the writing base plate (7) are fixedly connected with ear plates (9), and a roller shaft (10) is rotatably connected between the two ear plates (9), and a curtain (11) is fixed and rolled up on the roller shaft (10).

2. A teaching projection device according to claim 1, characterized in that: The plug-in assembly (3) comprises a latch sleeve (3a) fixedly connected to the end of a rotating shaft (6), a latch (3b) being inserted into the latch sleeve (3a), and two positioning holes (3c) for inserting into the latch (3b) are provided on the mounting block (5), and the two positioning holes (3c) are respectively located in the vertical and horizontal directions.

3. A teaching projection device according to claim 2, characterized in that: The end of the latch pin (3b) is fixedly connected to a magnetic plate (3d), and the magnetic plate (3d) is magnetically connected to the iron latch pin sleeve (3a).

4. A teaching projection device according to claim 1, characterized in that: A plurality of grooves (12) are provided on the end surface of the writing base plate (7), each of the grooves (12) is connected to an elastic band (13), a plurality of protrusions (14) corresponding to the grooves (12) are fixedly connected to the end surface of the writing side plate (8), and the other end of the elastic band (13) is fixedly connected to the protrusion (14).

5. A teaching projection device according to claim 1, characterized in that: The clamping structure comprises clamping plates (15) fixedly connected to both sides of the surface of the writing base plate (7), and both sides of the writing side plate (8) are provided with fixing grooves (16) clamped to the clamping plates (15).

6. A teaching projection device according to claim 1, characterized in that: The bolt connector (4) comprises a fixing block (4a) fixedly connected to the end of the writing base plate (7), a bolt (4b) being rotatably connected to the fixing block (4a), and a nut (4c) threadedly connected to the bolt (4b) being fixedly connected to the end of the writing side plate (8).

7. A teaching projection device according to claim 1, characterized in that: The two ear plates (9) are fixedly connected with a pipe clamp (18), the end of the curtain (11) is fixedly connected with a fixing rod (17) clamped with the pipe clamp (18), and both ends of the fixing rod (17) are fixedly connected with an end plate (19), and the fixing rod (17) is designed as a counterweight.

8. A teaching projection device according to claim 1, characterized in that: Universal wheels (20) are fixedly mounted at the four corners of the bottom surface of the base (1), and a locking structure is provided on the universal wheels (20).

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