Projection device for computer science teaching

Abstract

The utility model discloses a projection device for computer science teaching. The projection device comprises a fixing seat, a fixing hole is formed in the upper surface of the fixing seat, a hydraulic cylinder is installed below the fixing seat, a hydraulic rod is installed below the hydraulic cylinder, and a connecting block is fixed below the hydraulic rod; according to the projection device for computer science teaching, through cooperative use of the fixing plate, the positioning groove, the air cylinder, the telescopic rod, the baffle and the positioning block, when a projector does not need to be used for teaching, a switch of the air cylinder can be turned on to drive the telescopic rod to stretch out and draw back, and the baffle is moved to the outer side of the projection lens to protect the projection lens; therefore, the projection lens can be prevented from being directly exposed outside, a large amount of dust is prevented from being attached to the surface, the definition of images projected by the projection lens is ensured, the baffle cannot shake in the moving process due to the arrangement of the positioning block, and the projection lens is prevented from being touched by mistake due to position deviation of the baffle.

Description

Technical Field

[0001] The utility model relates to the technical field related to projection devices, in particular to a projection device for computer science teaching. Background Art

[0002] Computer science is the science that studies computers and various phenomena and laws around them, that is, the discipline that studies computer system structure, program system, artificial intelligence, and the nature and problems of computing itself. Computer science is a systematic discipline that includes a variety of topics related to computing and information processing, from abstract algorithm analysis, formal grammar, etc., to more specific topics such as programming languages, program design, software and hardware, etc. In the teaching process of computer science, projection devices are usually used for teaching. Projection devices can project images or videos onto a screen, and can play corresponding video signals with the computer through different interfaces.

[0003] However, the projection lens of the existing projection device is exposed to the outside for a long time, and dust will adhere to the surface of the projection lens. The long-term accumulation of dust affects the clarity of the projected image, making it inconvenient to carry out computer science teaching. Therefore, the present application provides a projection device for computer science teaching to meet the needs. Utility Model Content

[0004] The purpose of the utility model is to provide a projection device for computer science teaching to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a projection device for computer science teaching, comprising a fixed seat, an upper surface of the fixed seat is provided with a fixing hole, a hydraulic cylinder is installed below the fixed seat, a hydraulic rod is installed below the hydraulic cylinder, a connecting block is fixed below the hydraulic rod, a mounting frame is fixed to the outer side of the connecting block, a telescopic frame is movably connected inside the mounting frame, a fastening knob is installed above the telescopic frame, a fixing bolt is passed through one side of the upper side of the telescopic frame, a connecting plate is installed below the telescopic frame, a projector is installed below the connecting plate, a projection lens is installed on one side of the projector, a fixing plate is fixed to one side of the projector, positioning grooves are provided on the upper and lower sides of the fixing plate, a cylinder is installed on one side of the fixing plate, a telescopic rod is installed at one end of the cylinder, a baffle is fixed at one end of the telescopic rod, and positioning blocks are fixed on both sides of the baffle.

[0006] Preferably, the connection block forms a lifting structure through a hydraulic cylinder and a fixed seat, and the hydraulic cylinder and the hydraulic rod are vertically distributed.

[0007] Preferably, the telescopic frame forms a telescopic structure through a mounting frame and a connecting block, and the mounting frame is arranged in a cross-shaped structure.

[0008] Preferably, the telescopic frame is threadedly connected to the connecting plate via fixing bolts, and the fixing bolts are symmetrically arranged with respect to the central axis of the connecting plate.

[0009] Preferably, the baffle plate forms a telescopic structure through a cylinder and a fixed plate, and the baffle plate is arranged corresponding to the projection lens.

[0010] Preferably, the baffle plate forms a sliding structure through a positioning block and a fixing plate, and the positioning block matches the size of the positioning groove.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. A projection device for computer science teaching, through the coordinated use of a fixing plate, a positioning groove, a cylinder, a telescopic rod, a baffle and a positioning block, when the projector is not needed for teaching, the switch of the cylinder can be turned on to drive the telescopic rod to extend and retract, and the baffle is moved to the outside of the projection lens to protect the projection lens, thereby preventing the projection lens from being directly exposed to the outside and having a large amount of dust attached to the surface, ensuring the clarity of the image projected by the projection lens, so as to facilitate computer science teaching, and the positioning block is set so that the baffle will not shake during the movement;

[0013] 2. The projection device for computer science teaching can adjust the extension length of the telescopic frame by setting the mounting frame, telescopic frame, fastening knob and fixing bolt. When in use, it can be adjusted to different positions according to the sizes of different projectors, which facilitates the installation and connection between the mounting frame and the projector, thereby improving the application range of the mounting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the hydraulic cylinder of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the mounting frame of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the baffle of the utility model.

[0018] In the figure: 1. fixing seat; 2. fixing hole; 3. hydraulic cylinder; 4. hydraulic rod; 5. connecting block; 6. mounting frame; 7. telescopic frame; 8. fastening knob; 9. fixing bolt; 10. connecting plate; 11. projector; 12. projection lens; 13. fixing plate; 14. positioning groove; 15. cylinder; 16. telescopic rod; 17. baffle; 18. positioning block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides a technical solution: a projection device for computer science teaching, comprising a fixed seat 1, a fixing hole 2 is opened on the upper surface of the fixed seat 1, a hydraulic cylinder 3 is installed below the fixed seat 1, a hydraulic rod 4 is installed below the hydraulic cylinder 3, a connecting block 5 is fixed below the hydraulic rod 4, the connecting block 5 forms a lifting structure with the fixed seat 1 through the hydraulic cylinder 3, the hydraulic cylinder 3 and the hydraulic rod 4 are vertically distributed, and the height of the projector 11 can be adjusted through the hydraulic cylinder 3 during computer science teaching, so that the image projected by the projector 11 corresponds to the screen, a mounting frame 6 is fixed on the outside of the connecting block 5, and a telescopic frame 7 is movably connected to the inside of the mounting frame 6, and the telescopic frame 7 is connected through The mounting frame 6 and the connecting block 5 form a telescopic structure. The mounting frame 6 is a cross-shaped structure. The extended length of the telescopic frame 7 can be adjusted. When in use, it can be adjusted to different positions according to the size of different projectors 11. A fastening knob 8 is installed on the top of the telescopic frame 7. A fixing bolt 9 penetrates through one side of the top of the telescopic frame 7. The telescopic frame 7 is threadedly connected to the connecting plate 10 through the fixing bolt 9. The fixing bolt 9 is symmetrically arranged with the central axis of the connecting plate 10. The connecting plate 10 is installed below the telescopic frame 7, and the fixing bolt 9 is screwed in to fix the connecting plate 10. The projector 11 can be installed. A connecting plate 10 is installed below the telescopic frame 7, and the projector 11 is installed below the connecting plate 10;

[0021] See also Figure 1 and Figure 4A projection lens 12 is installed on one side of the projector 11, a fixing plate 13 is fixed on one side of the projector 11, and positioning grooves 14 are provided on both upper and lower sides of the fixing plate 13, a cylinder 15 is installed on one side of the fixing plate 13, a telescopic rod 16 is installed on one end of the cylinder 15, and a baffle 17 is fixed on one end of the telescopic rod 16, and the baffle 17 forms a telescopic structure with the fixing plate 13 through the cylinder 15, and the baffle 17 is arranged corresponding to the projection lens 12. When the projector 11 is not needed for teaching, the switch of the cylinder 15 can be turned on to drive the telescopic rod 16 to extend and retract, and the baffle 17 can be moved to the fixed plate 13. The plate 17 moves to the outside of the projection lens 12 to protect the projection lens 12, thereby preventing the projection lens 12 from being directly exposed to the outside and having a large amount of dust attached to the surface, thereby ensuring the clarity of the image projected by the projection lens 12. Positioning blocks 18 are fixed on both sides of the baffle 17. The baffle 17 forms a sliding structure with the fixed plate 13 through the positioning blocks 18. The size of the positioning blocks 18 matches that of the positioning groove 14. The setting of the positioning blocks 18 prevents the baffle 17 from shaking during the movement, thereby preventing the baffle 17 from accidentally hitting the projection lens 12 due to the deviation of the position.

[0022] Working principle: When using the projection device for computer science teaching, first turn on the external power supply, then install the connecting plate 10 under the telescopic frame 7, screw in the fixing bolt 9 to fix the connecting plate 10, the extended length of the telescopic frame 7 can be adjusted, and it can be adjusted to different positions according to the size of different projectors 11 when in use, and then fix the fixing seat 1 on the ceiling. When teaching computer science, the height of the projector 11 can be adjusted by the hydraulic cylinder 3, so that the image projected by the projector 11 corresponds to the screen. Finally, when the projector 11 is not needed for teaching, the switch of the cylinder 15 can be turned on to drive the telescopic rod 16 to extend and retract, and the baffle 17 can be moved to the outside of the projection lens 12 to protect the projection lens 12, thereby preventing the projection lens 12 from being directly exposed to the outside and having a large amount of dust attached to the surface. When the device is not used, the external power supply of the device is cut off. The model of the hydraulic cylinder 3 is MOB50, and the model of the cylinder 15 is SCJ80. In this way, the use process of the projection device for computer science teaching is completed.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A projection device for computer science teaching, comprising a fixing base (1), characterized in that: A fixing hole (2) is provided on the upper surface of the fixing seat (1), a hydraulic cylinder (3) is installed below the fixing seat (1), a hydraulic rod (4) is installed below the hydraulic cylinder (3), a connecting block (5) is fixed below the hydraulic rod (4), a mounting frame (6) is fixed to the outside of the connecting block (5), a telescopic frame (7) is movably connected inside the mounting frame (6), a tightening knob (8) is installed above the telescopic frame (7), a fixing bolt (9) penetrates through one side of the upper side of the telescopic frame (7), and a connecting rod (5) is installed below the telescopic frame (7). A plate (10) is provided below the connecting plate (10), a projector (11) is provided at one side of the projector (11), a projection lens (12) is provided at one side of the projector (11), a fixing plate (13) is fixed at one side of the projector (11), positioning grooves (14) are provided at both upper and lower sides of the fixing plate (13), a cylinder (15) is provided at one side of the fixing plate (13), a telescopic rod (16) is provided at one end of the cylinder (15), a baffle (17) is fixed at one end of the telescopic rod (16), and positioning blocks (18) are fixed at both sides of the baffle (17).

2. A projection device for computer science teaching according to claim 1, characterized in that: The connection block (5) forms a lifting structure through a hydraulic cylinder (3) and a fixed seat (1), and the hydraulic cylinder (3) and the hydraulic rod (4) are vertically distributed.

3. A projection device for computer science teaching according to claim 1, characterized in that: The telescopic frame (7) forms a telescopic structure through the mounting frame (6) and the connecting block (5), and the mounting frame (6) is arranged in a cross-shaped structure.

4. A projection device for computer science teaching according to claim 1, characterized in that: The telescopic frame (7) is threadedly connected to the connecting plate (10) via a fixing bolt (9), and the fixing bolt (9) is symmetrically arranged with respect to the central axis of the connecting plate (10).

5. A projection device for computer science teaching according to claim 1, characterized in that: The baffle (17) forms a telescopic structure through the cylinder (15) and the fixed plate (13), and the baffle (17) is arranged corresponding to the projection lens (12).

6. A projection device for computer science teaching according to claim 1, characterized in that: The baffle plate (17) forms a sliding structure with the fixing plate (13) via a positioning block (18), and the size of the positioning block (18) matches that of the positioning groove (14).

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