Physical experiment teaching demonstration device

Abstract

The invention discloses a physical experiment teaching demonstration device, and belongs to the technical field of experiment teaching aids, and the device comprises a bottom plate, the left side of the upper surface of the bottom plate is fixedly connected with a side plate, the upper surface of the bottom plate is provided with a plurality of sliding transverse grooves, and the right side of the side plate is provided with a plurality of through sliding vertical grooves. The interiors of the multiple sliding transverse grooves are in sliding connection with sliding blocks. By arranging a plurality of sliding transverse grooves and sliding vertical grooves, and sliding blocks, moving blocks and test boxes matched with the sliding transverse grooves and the sliding vertical grooves, the heights of a plurality of test boxes can be adjusted, so that a plurality of small balls fall from different heights, the problem that an existing device cannot simulate the motion law is effectively solved, the efficiency and intuition of teaching are improved, and the teaching efficiency is improved. And meanwhile, the height of the test box can be easily adjusted by rotating the operating handle through threaded connection of the adjusting screw rod and the moving block.

Description

Technical Field

[0001] The invention relates to the technical field of experimental teaching aids, in particular to a physical experiment teaching demonstration device. Background Art

[0002] Physics is an experimental science. Without physical experiments, physics cannot be developed, and the quality of physics teaching cannot be improved. The traditional teaching concept is to emphasize theory over practice. Teachers only focus on instilling theoretical knowledge in class, but ignore the cultivation of students' practical ability, which leads to students only memorizing some scientific knowledge and using book theories to solve problems. They have a weak sense of experiment and poor hands-on ability. Therefore, it is necessary to improve the existing teaching methods, attach importance to the experiment in middle school physics teaching, let students complete the experiment by themselves, and strengthen students' practical ability.

[0003] When learning about speed and acceleration, we need to use experiments to demonstrate the laws of object movement. In the experiment, we measure time and distance and then calculate the speed and acceleration to reveal the physics theory. The existing physics teaching demonstration equipment cannot simulate the motion laws displayed by multiple small balls falling from different heights, thereby reducing the efficiency and intuitiveness of teaching. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a solution to the problem that the existing physics teaching demonstration device cannot simulate the motion laws displayed by multiple small balls falling from different heights, thereby reducing the efficiency and intuitiveness of teaching.

[0005] Technical solution: A physical experiment teaching demonstration device, comprising a bottom plate, a side plate fixedly connected to the left side of the upper surface of the bottom plate, a plurality of sliding transverse grooves are provided on the upper surface of the bottom plate, a plurality of through-type sliding vertical grooves are provided on the right side of the side plate, a plurality of sliding transverse grooves are slidably connected to the inside of each of the plurality of sliding transverse grooves, a plurality of sliding vertical grooves are slidably connected to the inside of each of the plurality of sliding blocks, a plurality of test boxes are rotatably connected to the right side of each of the plurality of moving blocks and the upper surfaces of the plurality of sliding blocks through a rotating shaft;

[0006] The inner lower surfaces of the plurality of sliding vertical grooves are rotatably connected to adjusting screws via rotating shafts, the top ends of the plurality of adjusting screws extend to the top of the side plates and are fixedly connected to operating handles, and the outer side walls of the plurality of adjusting screws are respectively threadedly connected to the plurality of moving blocks.

[0007] Furthermore, rolling grooves are formed on the upper surfaces of the plurality of test boxes, baffles are provided on the left sides of the interiors of the plurality of rolling grooves, and test balls are provided inside the plurality of rolling grooves and on the left sides of the plurality of baffles.

[0008] Furthermore, a plurality of universal wheels are provided on the lower surface of the base plate.

[0009] Furthermore, photoelectric sensing devices are symmetrically arranged on the front and rear surfaces of the plurality of test boxes.

[0010] Furthermore, the upper surface of the bottom plate is symmetrically fixedly connected to a support rod located on the left side of the side plate, the top ends of the two support rods are commonly fixedly connected to a fixing plate, the upper surface of the fixing plate is fixedly connected to a control box, the interior of the control box is slidably connected to a piston plate 1, the left center of the piston plate 1 is fixedly connected to a connecting rod, the left end of the connecting rod extends to the left side of the control box and is fixedly connected to a pulling circular plate, a plurality of springs are fixedly connected to the left side of the piston plate 1 and the inner left side of the control box, and a plurality of gas hoses are fixedly connected to the right side of the control box.

[0011] Furthermore, the lower surfaces of the multiple test boxes and below the multiple baffles are fixedly connected with sliding boxes, the interiors of the multiple sliding boxes are slidably connected with piston plates 2, the upper surfaces of the multiple piston plates 2 are respectively fixedly connected with the lower surfaces of the multiple baffles, the right ends of the multiple gas hoses respectively pass through the multiple sliding vertical grooves, which are respectively fixedly connected with the left sides of the multiple sliding boxes.

[0012] Furthermore, a protective pad is fixedly connected to the inner right side of each of the plurality of rolling grooves.

[0013] Furthermore, a display screen is provided on the front surface of the base plate.

[0014] Furthermore, the inner left sides and the inner right sides of the plurality of sliding transverse grooves are commonly fixedly connected with guide rods, and the outer side walls of the plurality of guide rods are respectively slidably connected with the plurality of sliding blocks.

[0015] Beneficial effects: By setting multiple sliding horizontal grooves and sliding vertical grooves, as well as the matching sliders, moving blocks and test boxes, the heights of multiple test boxes can be adjusted, so that multiple small balls can fall from different heights, which effectively solves the problem that the existing device cannot simulate the law of motion, improves the efficiency and intuitiveness of teaching, and helps students better understand the laws of physical motion. At the same time, by adjusting the screw and the moving block threaded connection, the height of the test box can be easily adjusted by turning the operating handle. The operation is simple and convenient, and teachers can quickly adjust the experimental device according to teaching needs;

[0016] Through the combination of the control box, the piston plate 1, the spring, the connecting rod, the pulling circular plate, the gas hose, the sliding box and the piston plate 2, the automatic control of multiple baffles is realized. By pulling the pulling circular plate outward, the piston plate 1 compresses the spring, and the gas in the sliding box enters the control box through the gas hose, so that the piston plate 2 and the baffle move downward, and multiple test balls fall at the same time, so that the operation is more automated and the influence of manual intervention on the experiment is reduced;

[0017] By symmetrically arranging photoelectric sensing devices on the front and rear surfaces of multiple test boxes, relevant data in the falling process of the ball, such as time, speed, etc., can be accurately measured, providing accurate data support for students to analyze experimental results. At the same time, the data measured by the photoelectric sensing device can be intuitively displayed through the set display screen, which is convenient for students to observe and record, thereby improving teaching effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a front view structural schematic diagram of the cross section of the bottom plate and the side plate of the present invention;

[0020] Figure 3 It is a schematic diagram of the front cross-section structure of the control box of the present invention;

[0021] Figure 4 It is a partial front view structural schematic diagram of the cross section of the test box and the sliding box of the present invention.

[0022] In the figure: 1. bottom plate; 2. side plate; 3. sliding horizontal groove; 4. sliding vertical groove; 5. slider; 6. moving block; 7. test box; 8. adjusting screw; 9. operating handle; 10. rolling groove; 11. baffle; 12. test ball; 13. universal wheel; 14. photoelectric sensing device; 15. support rod; 16. fixing plate; 17. control box; 18. piston plate one; 19. connecting rod; 20. pulling circular plate; 21. spring; 22. gas hose; 23. sliding box; 24. piston plate two; 25. protection pad; 26. display screen; 27. guide rod. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example

[0025] like Figure 1 As shown, a plurality of universal wheels 13 are provided on the lower surface of the base plate 1;

[0026] Multiple universal wheels 13 are evenly distributed on the lower surface of the base plate 1, which can provide flexible mobility for the entire physical experiment teaching demonstration device. When the device is moved to a specified position, the braking device on the outside of the universal wheel 13 can be used to keep the device firmly in place, avoiding unnecessary displacement during the demonstration and providing guarantee for the smooth progress of the experiment.

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, a physical experiment teaching demonstration device is provided, comprising a bottom plate 1, a side plate 2 is fixedly connected to the left side of the upper surface of the bottom plate 1, a plurality of sliding transverse grooves 3 are provided on the upper surface of the bottom plate 1, a plurality of through-type sliding vertical grooves 4 are provided on the right side of the side plate 2, a plurality of sliding transverse grooves 3 are slidably connected to sliders 5 inside, a plurality of sliding vertical grooves 4 are slidably connected to moving blocks 6 inside, a plurality of testing boxes 7 are rotatably connected to the upper surfaces of the plurality of sliders 5 on the right sides of the plurality of moving blocks 6 through rotating shafts, a plurality of adjusting screws 8 are rotatably connected to the lower surfaces of the plurality of sliding vertical grooves 4 through rotating shafts, the top ends of the plurality of adjusting screws 8 extend to the top of the side plate 2, and are fixedly connected to operating handles 9, and the outer side walls of the plurality of adjusting screws 8 are respectively threadedly connected to the plurality of moving blocks 6;

[0028] When conducting a ball flow experiment in which multiple small balls fall from different heights to demonstrate the laws of motion, the operator can drive the adjusting screw 8 to rotate by turning the operating handle 9. Since the adjusting screw 8 is threadedly connected to the moving block 6, the moving block 6 will move up and down in the sliding vertical groove 4. The movement of the moving block 6 will drive the slider 5 to move in the sliding horizontal groove 3 through the rotating shaft, thereby changing the inclination angle of the test box 7. By adjusting the inclinations of different test boxes 7, the situation of multiple small balls falling from different heights can be simulated. During the experiment, the small balls are placed in test boxes 7 with different inclinations, and the small balls are released to observe their rolling trajectories, speed changes and other laws of motion, thereby intuitively demonstrating physical knowledge to students.

[0029] like Figure 2 As shown, the inner left side and the inner right side of the plurality of sliding transverse grooves 3 are both fixedly connected with guide rods 27, and the outer side walls of the plurality of guide rods 27 are respectively slidably connected with the plurality of sliders 5;

[0030] When the operator adjusts the tilt angle of the test box 7 by turning the operating handle 9, the moving block 6 moves up and down in the sliding vertical groove 4, and drives the slider 5 to move in the sliding horizontal groove 3 through the rotating shaft. At this time, the guide rod 27 provided can effectively constrain the movement direction of the slider 5 to prevent it from deflecting or shaking during the movement.

[0031] like Figure 1 and Figure 4As shown, the upper surfaces of the multiple test boxes 7 are each provided with a rolling groove 10, the inner left sides of the multiple rolling grooves 10 are each provided with a baffle 11, and the inner sides of the multiple rolling grooves 10 and the left sides of the multiple baffles 11 are each provided with a test ball 12;

[0032] The rolling groove 10 provides a specific track for the rolling of the test ball 12. The baffle 11 arranged inside the rolling groove 10 is used to block the test ball 12 at a specific position during the experiment preparation stage, so as to facilitate the operator to carry out various preparations.

[0033] like Figure 1 and Figure 4 As shown, the front and rear surfaces of the plurality of test boxes 7 are symmetrically provided with photoelectric sensing devices 14, and the front surface of the bottom plate 1 is provided with a display screen 26;

[0034] When the test ball 12 starts to roll, the photoelectric sensing device 14 starts to work. When the test ball 12 passes by, a signal change is generated. This signal is transmitted to the timing system inside the device and timing starts. When the test ball 12 passes by the photoelectric sensing device 14 again, a signal change is generated again. The timing system stops timing after receiving the signal, thereby accurately recording the time for the test ball 12 to pass through the test box 7. These recorded time data will be transmitted to the display screen 26. The display screen 26 displays the passing time of the test ball 12 corresponding to different test boxes 7 in an intuitive digital form. Students can not only intuitively observe the rolling trajectory and speed changes of the test ball 12 in the rolling groove 10 with different inclinations, but also use the time data displayed on the display screen 26 to more accurately compare the movement differences of the test ball 12 falling from different heights, and deeply understand the movement laws of objects when falling at different heights, such as the relationship between speed and height, changes in acceleration and other physical knowledge.

[0035] like Figure 1 , Figure 3 and Figure 4As shown, the upper surface of the bottom plate 1 and the left side of the side plate 2 are symmetrically fixedly connected with support rods 15, the top ends of the two support rods 15 are commonly fixedly connected with a fixing plate 16, the upper surface of the fixing plate 16 is fixedly connected with a control box 17, the interior of the control box 17 is slidably connected with a piston plate 18, the left center of the piston plate 18 is fixedly connected with a connecting rod 19, the left end of the connecting rod 19 extends to the left side of the control box 17, and is fixedly connected with a pulling circular plate 20, the left side of the piston plate 18 and the inner left side of the control box 17 are fixedly connected with a plurality of springs 21, the right side of the control box 17 is fixedly connected with a plurality of gas hoses 22, the lower surfaces of the plurality of test boxes 7 and located below the plurality of baffles 11 are fixedly connected with sliding boxes 23, the interiors of the plurality of sliding boxes 23 are slidably connected with piston plates 24, the upper surfaces of the plurality of piston plates 24 are respectively fixedly connected with the lower surfaces of the plurality of baffles 11, the right ends of the plurality of gas hoses 22 respectively pass through a plurality of sliding vertical slots 4, which are respectively fixedly connected with the left sides of the plurality of sliding boxes 23;

[0036] After adjusting the inclination angle of multiple test boxes 7, the operator places multiple test balls 12 on the left side of the baffles 11 in the multiple rolling grooves 10 respectively. At this time, the operator pulls the pulling circular plate 20 set outward, and the pulling circular plate 20 drives the piston plate 18 to slide to the left in the control box 17 through the connecting rod 19, so that it can be quickly transported to the multiple sliding boxes 23 through the multiple air supply hoses 22, so that the multiple piston plates 24 slide downward. Since the upper surface of the piston plate 24 is fixedly connected to the lower surface of the baffle 11, the downward movement of the piston plate 24 causes the baffle 11 to move downward synchronously. Since each sliding box 23 receives compressed air from the control box 17 through the air supply hose 22 at the same time, the multiple baffles 11 can be slid downward at the same time. In this way, the test balls 12 in the multiple rolling grooves 10 lose the obstruction of the baffle 11 at the same time, and start to roll along their respective rolling grooves 10 under the action of gravity, thereby facilitating the realization of accuracy.

[0037] like Figure 1 As shown, a protection pad 25 is fixedly connected to the right side of the inner part of each of the plurality of rolling grooves 10;

[0038] The protective pad 25 can effectively absorb part of the kinetic energy of the test ball 12 and reduce the impact force, thereby not only ensuring the integrity of the test ball 12 and extending its service life, but also ensuring the stability and repeatability of each test result.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A physical experiment teaching demonstration device, comprising a bottom plate (1), characterized in that: The left side of the upper surface of the bottom plate (1) is fixedly connected to a side plate (2); the upper surface of the bottom plate (1) is provided with a plurality of sliding transverse grooves (3); the right side of the side plate (2) is provided with a plurality of through-type sliding vertical grooves (4); the interiors of the plurality of sliding transverse grooves (3) are all slidably connected to sliders (5); the interiors of the plurality of sliding vertical grooves (4) are all slidably connected to moving blocks (6); the right sides of the plurality of moving blocks (6) are respectively rotatably connected to a plurality of test boxes (7) together with the upper surfaces of the plurality of sliders (5) via a rotating shaft; The inner lower surfaces of the plurality of sliding vertical grooves (4) are rotatably connected to adjusting screws (8) via rotating shafts, the top ends of the plurality of adjusting screws (8) extend above the side plates (2) and are fixedly connected to operating handles (9), and the outer side walls of the plurality of adjusting screws (8) are respectively threadedly connected to the plurality of moving blocks (6).

2. A physical experiment teaching demonstration device according to claim 1, characterized in that: The upper surfaces of the plurality of test boxes (7) are each provided with a rolling groove (10), a baffle (11) is each provided on the left side inside the plurality of rolling grooves (10), and a test ball (12) is each provided inside the plurality of rolling grooves (10) and on the left side of the plurality of baffles (11).

3. A physical experiment teaching demonstration device according to claim 1, characterized in that: A plurality of universal wheels (13) are provided on the lower surface of the base plate (1).

4. A physical experiment teaching demonstration device according to claim 1, characterized in that: Photoelectric sensing devices (14) are symmetrically arranged on the front and rear surfaces of the plurality of test boxes (7).

5. A physical experiment teaching demonstration device according to claim 2, characterized in that: A support rod (15) is symmetrically fixedly connected to the upper surface of the bottom plate (1) and located on the left side of the side plate (2); the top ends of the two support rods (15) are commonly fixedly connected to a fixing plate (16); the upper surface of the fixing plate (16) is fixedly connected to a control box (17); a piston plate (18) is slidably connected inside the control box (17); a connecting rod (19) is fixedly connected at the left center of the piston plate (18); the left end of the connecting rod (19) extends to the left side of the control box (17) and is fixedly connected to a pulling circular plate (20); a plurality of springs (21) are fixedly connected to the left side of the piston plate (18) and the left side of the inside of the control box (17); and a plurality of gas hoses (22) are fixedly connected to the right side of the control box (17).

6. A physical experiment teaching demonstration device according to claim 5, characterized in that: The lower surfaces of the plurality of test boxes (7) and located below the plurality of baffles (11) are fixedly connected with sliding boxes (23), the interiors of the plurality of sliding boxes (23) are slidably connected with piston plates 2 (24), the upper surfaces of the plurality of piston plates 2 (24) are respectively fixedly connected with the lower surfaces of the plurality of baffles (11), and the right ends of the plurality of gas supply hoses (22) respectively pass through the plurality of sliding vertical grooves (4), which are respectively fixedly connected with the left sides of the plurality of sliding boxes (23).

7. A physical experiment teaching demonstration device according to claim 2, characterized in that: A protection pad (25) is fixedly connected to the right side of the inside of each of the plurality of rolling grooves (10).

8. A physical experiment teaching demonstration device according to claim 1, characterized in that: A display screen (26) is provided on the front surface of the base plate (1).

9. A physical experiment teaching demonstration device according to claim 1, characterized in that: The inner left sides and the inner right sides of the plurality of sliding transverse grooves (3) are fixedly connected to a guide rod (27), and the outer side walls of the plurality of guide rods (27) are respectively slidably connected to the plurality of sliding blocks (5).

Images