CN220582084U - Put in screen - Google Patents

Abstract

The utility model relates to the technical field of projection screens, and discloses a projection screen, which includes a base. A support frame is fixedly connected to the top of the base, and a motor frame is fixedly connected to one side of the support frame. The inside of the motor frame An A servo motor is fixedly installed, and the output end of the A servo motor is splined with an A transmission rod. In this projection screen, through the settings of B servo motor, B gear and L-shaped plate, the display body is protected by the right baffle and the left baffle. The power of B servo motor is started, and the B servo motor drives the B transmission rod and B The rotating rod rotates, driving the B gear to rotate counterclockwise. At this time, the B rack moves to the left and the C rack moves to the right, driving the A horizontal plate, L-shaped plate and right baffle to move to the left, and at the same time driving the B horizontal plate and left The baffle moves to the right, that is, the right baffle and the left baffle move toward each other until they fit together and block the display screen body, thereby preventing garbage from contaminating the display screen body when not in use, thereby making the device better protect the display screen body.

Description

a projection screen

Technical field

The utility model relates to the technical field of projection screens, and in particular to a projection screen.

Background technique

The use of projection screens in multimedia teaching has been widely used in all walks of life, such as mathematics professors. The projection screen is a digital display device used to display mathematical content such as mathematical formulas, graphics, and problems. It can be used as a teaching tool to help students better understand mathematical concepts and problem-solving methods, and can be used in classroom teaching, online education platforms, and mathematics competitions. In general, the mathematics projection screen is an innovative teaching tool that can promote students' learning and understanding of mathematics.

A projection screen is disclosed in Publication No. CN217178006U. Although this utility model provides a multimedia teaching projection screen, when the display screen is not in use, the gear is driven to rotate by the operation of the motor, and the display is driven by the meshing of the rack and the gear. The screen slides into the storage frame to protect the display. During this process, the limit block slides inside the limit groove to support the display, improve the stability of the display, and store the display. protection.

However, this projection screen has the following shortcomings:

(1) The storage basket of this device is penetrating, and dust and other contaminants may enter the storage basket and be difficult to clean, and the protection of the display body is poor;

(2) The height of the delivery screen needs to be adjusted according to different situations. This device is equipped with a storage basket under the display screen body. When the display screen body needs to be lowered, the content will be blocked, making it less practical.

Utility model content

(1) Technical problems solved

The technical problem solved by the utility model is to provide a delivery screen that is highly practical, can be operated through simple operations, and has a relatively simple structure. It solves the problem in the above-mentioned background technology that pollutants may enter the storage basket and is difficult to clean and is relatively protective. The problem is that when the display body is lowered, the content is blocked by the storage basket and the practicality is poor.

(2) Technical solutions

In order to achieve the above objectives, the present utility model is realized through the following technical solutions: a projection screen, including a base, a support frame is fixedly connected to the top of the base, and a motor frame is fixedly connected to one side of the support frame, and the motor A servo motor is fixedly installed inside the frame. The output end of the A servo motor is splined to an A transmission rod. One end of the A transmission rod is fixedly connected to an A rotating rod. The surface of the A rotating rod is rotationally connected to A gear, the surface of the A gear is meshed with the A rack, the surface of the A rack is fixedly connected with a fixed plate, the surface of the fixed plate is provided with a groove, and the inner bottom wall of the groove is fixedly connected with The display body has a motor box fixedly connected to the edge of the surface of the fixed plate. A B servo motor is fixedly installed inside the motor box. The output end of the B servo motor is splined to a B transmission rod. The B transmission One end of the rod is fixedly connected with the B rotating rod.

Optionally, a B gear is rotatably connected to the surface of the B rotating rod, a B rack is meshed with the surface of the B gear, and an A horizontal plate is fixedly connected to the surface of the B rack. Counterclockwise rotation of the B gear will drive the Rack B moves to the left, and horizontal plate A moves to the left.

Optionally, an L-shaped plate is fixedly connected to one side of the A horizontal plate, a right baffle is fixedly connected to the surface of the L-shaped plate, an A movable block is fixedly connected to the bottom of the right baffle, and the A horizontal plate When moving to the left, the L-shaped plate and the right baffle are driven to move to the left, and the A movable block makes the right baffle move more smoothly.

Optionally, the opposite surface of the B gear and the B rack is meshed with a C rack, and the surface of the C rack is fixedly connected with a B horizontal plate. When the B gear rotates counterclockwise, the C rack moves to the right, and at the same time Can drive horizontal plate B to move to the right.

Optionally, a left baffle is fixedly connected to the surface of the B horizontal plate, and a B movable block is fixedly connected to the bottom of the left baffle. The B horizontal plate moves to the right to drive the left baffle to move, so that the right baffle and The left baffle can move toward each other to block the display body.

Optionally, a chute is provided on the surface of the support frame, and a slider is slidingly connected to the inside of the chute. The surface of the slider is fixedly connected to the back of the fixed plate. When the A rack drives the fixed plate to move up and down, , the slide block is limited to slide in the chute, making the lifting and lowering of the fixed plate more stable.

(3) Beneficial effects

The utility model provides a projection screen, which has the following beneficial effects:

1. For this projection screen, through the settings of B servo motor, B gear and L-shaped plate, the display body is protected by the right baffle and the left baffle. Start the power supply of B servo motor, and the B servo motor drives the B transmission rod. The rotation of the rotating rod B drives the B gear to rotate counterclockwise. At this time, the B rack moves to the left and the C rack moves to the right, driving the A horizontal plate, L-shaped plate and right baffle to move to the left, and at the same time driving the B horizontal plate and the left baffle moves to the right, that is, the right baffle and the left baffle move toward each other until they fit together and block the display screen body, thereby preventing garbage from contaminating the display screen body when not in use, thereby making the device more effective in protecting the display screen body. good.

2. This projection screen, through the settings of A servo motor, A gear and fixed plate, allows this device to adjust the height of the display screen body, start the power supply of A servo motor, and the A servo motor drives the A transmission rod, A rotating rod and A The gear rotates, driving the A rack to move upward. At this time, the fixed plate and the display screen body move upward. The reverse rotation of the A servo motor drives the fixed plate and the display screen body to move downward, thereby allowing the display screen body of the device to move downward. Adaptable to different situations, thereby making the device more practical.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the utility model;

Figure 2 is a schematic structural diagram of the support frame of the present utility model;

Figure 3 is a schematic diagram of the structure of gear A of the present utility model;

Figure 4 is a schematic structural diagram of the L-shaped plate of the present utility model.

In the picture: 1. Base; 2. Support frame; 3. Motor frame; 4. A servo motor; 5. A transmission rod; 6. A rotating rod; 7. A gear; 8. A rack; 9. Fixed plate ; 10. Display body; 11. Motor box; 12. B servo motor; 13. B transmission rod; 14. B rotating rod; 15. B gear; 16. B rack; 17. A horizontal plate; 18. L Profile plate; 19. Right baffle; 20. A movable block; 21. C rack; 22. B horizontal plate; 23. Left baffle; 24. B movable block; 25. Slider.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

Please refer to Figures 1 to 4. The present utility model provides a technical solution: a projection screen, including a base 1. The top of the base 1 is fixedly connected with a support frame 2, and one side of the support frame 2 is fixedly connected with a motor frame 3. Through the settings of the motor frame 3, A servo motor 4, A transmission rod 5, A rotating rod 6, A gear 7, A rack 8 and fixed plate 9, the device can adjust the height of the display screen body 10 and start the A servo The power supply of motor 4, A servo motor 4 drives the A transmission rod 5, A rotating rod 6 and A gear 7 to rotate, driving the A rack 8 to move upward. At this time, the fixed plate 9 and the display screen body 10 move upward, causing the A servo motor to move upward. 4. Reverse rotation can drive the fixing plate 9 and the display screen body 10 to move downward, so that the display screen body 10 of the device can be adapted to different situations, thereby making the device more practical and the internal fixation of the motor frame 3 A servo motor 4 is installed. The model of A servo motor 4 is AKM23C-ANCNC-00, the rated torque is 2.3Nm, and the rated power is 3.4kW. The output end of A servo motor 4 is splined with A transmission rod 5, A One end of the transmission rod 5 is fixedly connected with the A rotating rod 6, the surface of the A rotating rod 6 is rotationally connected with the A gear 7, the surface of the A gear 7 is meshed with the A rack 8, and the surface of the A rack 8 is fixedly connected with the fixing plate 9 , the surface of the fixed plate 9 is provided with a groove, the inner bottom wall of the groove is fixedly connected to the display screen body 10, the edge of the surface of the fixed plate 9 is fixedly connected to the motor box 11, and the B servo motor 12 is fixedly installed inside the motor box 11 , through the settings of B servo motor 12, B transmission rod 13, B rotating rod 14, B gear 15 and L-shaped plate 18, the display screen body 10 is closely protected by the right baffle 19 and the left baffle 23, and the B servo is started. The power supply of the motor 12, the B servo motor 12 drives the B transmission rod 13 and the B rotating rod 14 to rotate, driving the B gear 15 to rotate counterclockwise. At this time, the B rack 16 moves to the left and the C rack 21 moves to the right, driving the A horizontal The plate 17, the L-shaped plate 18 and the right baffle 19 move to the left, and at the same time drive the B horizontal plate 22 and the left baffle 23 to move to the right, that is, the right baffle 19 and the left baffle 23 move towards each other until they fit together and block the display screen body. 10, thereby preventing garbage from contaminating the display screen body 10 when not in use, so that the device can better protect the display screen body 10. The model of the B servo motor 12 is MHMD082G1U, the rated torque is 8Nm, and the rated power is 2.0kW. The output end of the B servo motor 12 is splined with the B transmission rod 13, and one end of the B transmission rod 13 is fixedly connected with the B rotating rod 14;

B gear 15 is rotatably connected to the surface of B rotating rod 14, B rack 16 is meshed with the surface of B gear 15, and A horizontal plate 17 is fixedly connected to the surface of B rack 16. Counterclockwise rotation of B gear 15 will drive the B rack. 16 moves to the left, and at the same time, the A horizontal plate 17 moves to the left;

An L-shaped plate 18 is fixedly connected to one side of the A horizontal plate 17. A right baffle 19 is fixedly connected to the surface of the L-shaped plate 18. A movable block 20 is fixedly connected to the bottom of the right baffle 19. The A horizontal plate 17 moves to the left. When the L-shaped plate 18 and the right baffle 19 are moved to the left, the A movable block 20 makes the right baffle 19 move more smoothly;

The opposite surfaces of B gear 15 and B rack 16 are meshed with C rack 21, and the surface of C rack 21 is fixedly connected with B horizontal plate 22. When B gear 15 rotates counterclockwise, C rack 21 moves to the right, and at the same time, Drive B horizontal plate 22 to move to the right;

The left baffle 23 is fixedly connected to the surface of the B horizontal plate 22, and the B movable block 24 is fixedly connected to the bottom of the left baffle 23. When the B horizontal plate 22 moves to the right, the left baffle 23 is moved, so that the right baffle 19 and the left baffle 23 are moved. The baffle 23 can move toward each other to block the display screen body 10;

A chute is provided on the surface of the support frame 2, and a slider 25 is slidably connected inside the chute. The surface of the slider 25 is fixedly connected to the back of the fixed plate 9. When the A rack 8 drives the fixed plate 9 to move up and down, the slider 25 It is limited to slide in the chute, making the lifting and lowering of the fixed plate 9 more stable.

In this utility model, the working steps of the device are as follows:

The first step: first start the power supply of B servo motor 12. B servo motor 12 drives B transmission rod 13 and B rotating rod 14 to rotate, driving B gear 15 to rotate counterclockwise. At this time, B rack 16 moves to the left and C rack 21 moves to the right, driving the A horizontal plate 17, L-shaped plate 18 and right baffle 19 to move to the left, and at the same time driving the B horizontal plate 22 and the left baffle 23 to move to the right, that is, the right baffle 19 and the left baffle 23 are opposite to each other. Move until it fits and blocks the display screen body 10;

Second step: Then start the power supply of B servo motor 12 to rotate B servo motor 12 in the reverse direction, driving the right baffle 19 to move to the right and the left baffle 23 to move to the left. At this time, the display screen body 10 is not blocked;

The third step: Finally start the power supply of A servo motor 4. A servo motor 4 drives the A transmission rod 5, A rotating rod 6 and A gear 7 to rotate, driving the A rack 8 to move upward. At this time, the fixed plate 9 and the display screen body 10 moves upward, causing the A servo motor 4 to rotate in the opposite direction to drive the fixing plate 9 and the display screen body 10 to move downward.

It should be noted that the equipment structure and drawings of the present utility model mainly describe the principle of the present utility model. In terms of the technical design principle, the settings of the device's power mechanism, power supply system and control system are not fully described. On the premise that those skilled in the art understand the principles of the above utility model, they can clearly know the details of its power mechanism, power supply system and control system. The control method of the application document is automatically controlled by a controller, and the control circuit of the controller is through Those skilled in the field can implement this through simple programming;

The standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as bolts, rivets, and welding that are mature in the existing technology. , the machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components are known to those skilled in the art through technical manuals or through conventional experimental methods.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. , substitutions and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A drop screen comprising a base (1), characterized in that: the motor is characterized in that the top of the base (1) is fixedly connected with the supporting frame (2), one side of the supporting frame (2) is fixedly connected with the motor frame (3), an A servo motor (4) is fixedly installed in the motor frame (3), an A transmission rod (5) is connected with an output end spline of the A servo motor (4), one end of the A transmission rod (5) is fixedly connected with an A rotating rod (6), the surface of the A rotating rod (6) is rotationally connected with an A gear (7), the surface of the A gear (7) is meshed with an A rack (8), the surface of the A rack (8) is fixedly connected with a fixing plate (9), a groove is formed in the surface of the fixing plate (9), the inner bottom wall of the groove is fixedly connected with a display screen body (10), a motor box (11) is fixedly connected with the edge of the surface of the fixing plate (9), a B servo motor (12) is fixedly installed in the inner side of the motor box (11), and one end spline of the B servo motor (12) is connected with a B transmission rod (13), and one end of the B transmission rod (13) is fixedly connected with a rotating rod (14).

2. A drop screen as claimed in claim 1, wherein: the surface rotation of B bull stick (14) is connected with B gear (15), the surface engagement of B gear (15) has B rack (16), the surface fixedly connected with A diaphragm (17) of B rack (16).

3. A drop screen as claimed in claim 2, wherein: one side of the A transverse plate (17) is fixedly connected with an L-shaped plate (18), the surface of the L-shaped plate (18) is fixedly connected with a right baffle (19), and the bottom of the right baffle (19) is fixedly connected with an A movable block (20).

4. A drop screen as claimed in claim 2, wherein: the surface of the B gear (15) opposite to the B rack (16) is meshed with a C rack (21), and the surface of the C rack (21) is fixedly connected with a B transverse plate (22).

5. A drop screen as claimed in claim 4, wherein: the surface of the B transverse plate (22) is fixedly connected with a left baffle plate (23), and the bottom of the left baffle plate (23) is fixedly connected with a B movable block (24).

6. A drop screen as claimed in claim 1, wherein: the sliding chute is formed in the surface of the supporting frame (2), a sliding block (25) is connected inside the sliding chute in a sliding mode, and the surface of the sliding block (25) is fixedly connected to the back face of the fixing plate (9).