Multifunctional demonstration device for middle school physical mechanics experiment

Abstract

The utility model discloses a multifunctional demonstration device for middle school physical mechanics experiments, which relates to the technical field of teaching demonstration devices and comprises a frame, a clothesline demonstration unit and a mutually angled force demonstration unit are respectively arranged in the frame, and the clothesline demonstration unit comprises two cross bars fixedly connected to the inner walls of the two sides of the frame. The surfaces of the two transverse rods are each sleeved with two symmetrical connecting sleeves, and a vertical rod is installed between the upper connecting sleeve and the lower connecting sleeve. The multifunctional demonstration device for the middle school physical mechanics experiment has the effects of simple operation and small error, the movable pulley is sleeved on the first test rope, the two ends of the first test rope are respectively fixed with the rope hanging nails on the two sides, and then the hanging weight body with the gram required by the experiment is hung on the hook of the movable pulley, so that the experiment is completed. And the movable ring is pulled to move on the surface of the vertical rod, so that the experimental phenomenon of the clothesline can be demonstrated through the movement of the movable pulley, and the teaching demonstration effect is improved while the operation is simple.

Description

Technical Field

[0001] This utility model relates to the field of teaching demonstration devices, and in particular to a multifunctional demonstration device for physics mechanics experiments in middle schools. Background Technology

[0002] Physics experiments are related experiments included in the physics curriculum at the junior and senior high school levels. They include electrical experiments, mechanical experiments, thermal experiments, optical experiments, etc., and are often used to verify theorems and laws in physics.

[0003] Mechanics experiments are one of the fundamental experiments in physics. Currently, when teaching mechanics experiments, most instructors use equipment such as rubber bands, two spring balances, and wooden boards for demonstration. This is cumbersome, increases the workload of instructors, makes it difficult for students to practice, and results obtained using spring balances and other similar equipment have significant errors.

[0004] Therefore, this application proposes a multifunctional demonstration device for physics mechanics experiments in middle schools. Utility Model Content

[0005] This utility model discloses a multifunctional demonstration device for physics mechanics experiments in middle schools, aiming to solve the technical problems of existing teaching demonstration devices being difficult to operate, having high hands-on difficulty, and having errors in experimental results.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-functional demonstration device for physics and mechanics experiments in middle school includes a frame, inside which are a clothesline demonstration unit and an angular force demonstration unit.

[0008] The clothesline demonstration unit includes two horizontal bars fixedly connected to the inner walls of both sides of the frame. Each horizontal bar has two symmetrical connecting sleeves fitted on its surface. A vertical bar is installed between the upper and lower connecting sleeves. A movable ring is slidably connected to the surface of the vertical bar. A fixing mechanism is provided on the surface of the movable ring. A hanging nail is fixedly connected to the opposite face of each of the two movable rings. A first test rope is connected between the two hanging nails. A movable pulley is mounted on the surface of the first test rope. A hook is fixedly connected to the lower surface of the movable pulley. A hanging weight body is hung below the movable pulley via the hook.

[0009] The angular force demonstration unit includes two fixed pulleys set inside the frame. The surfaces of the two fixed pulleys are provided with a second test rope. Both ends of the second test rope are fixedly connected with hanging rings. The back of the fixed pulleys is provided with suction cups.

[0010] The suction cups facilitate the loading and unloading of the fixed pulleys.

[0011] In a preferred embodiment, the inner ring surface of the moving ring is provided with a guide slider, and the surface of the vertical rod is provided with a guide groove for the guide slider to slide.

[0012] By setting a guide slider, the moving ring can smoothly slide in a directional manner on the surface of the vertical rod under the guidance of the guide slider.

[0013] In a preferred embodiment, the fixing mechanism includes a mounting block embedded in the front of the movable ring, an mounting groove extending through the inner ring surface of the movable ring into the mounting block, a backing plate being provided inside the mounting groove, a limiting tooth being provided on the back of the backing plate, and a tooth groove adapted to the limiting tooth being provided on the surface of the vertical rod.

[0014] By setting the limiting teeth and grooves, the moving ring can be fixed at a certain point on the surface of the vertical rod, achieving the effect of limiting and fixing.

[0015] In a preferred embodiment, the front of the mounting block has a sliding opening that extends into the mounting groove. The inner wall of the sliding opening is slidably connected to a pull rod that is fixedly connected to the front of the abutment. A spring is sleeved on the surface of the pull rod inside the mounting groove, and the two ends of the spring are fixedly connected to the inner front wall of the mounting groove and the front of the abutment, respectively.

[0016] The pull rod allows the abutment to be pulled back into the mounting slot, and the spring can be used to reset the abutment.

[0017] In a preferred embodiment, a magnetic plate is embedded inside the shell on the back of the frame, and a magnetic block is provided on the inner rear wall of the frame that is magnetically attracted to the magnetic plate.

[0018] By using magnetic blocks and magnetic plates, the paper can be fixed to the inner rear wall of the frame.

[0019] As can be seen from the above, the multifunctional demonstration device for middle school physics mechanics experiments provided by this utility model has the following technical effects.

[0020] Firstly, the movable pulley is fitted onto the first test rope, and both ends of the first test rope are fixed to the hanging nails on both sides. Then, the weight body required for the experiment is hung on the hook of the movable pulley, and the movable ring is pulled to move on the surface of the vertical rod. As the movable ring moves up and down, it drives one end of the first test rope to move synchronously. At this time, the experimental phenomenon of the clothesline can be demonstrated by the movement of the movable pulley. The operation is simple and the teaching demonstration effect is improved.

[0021] Secondly, the second test rope is placed on the surface of two fixed pulleys. The weights of the required weight are hung at both ends of the second test rope through the hanging rings, and another batch of weights of the required weight are hung in the middle of the second test rope. At the same time, during the clothesline experiment and the angular force experiment, the paper is fixed to the inner rear wall of the frame by magnetic blocks and magnetic plates. The rope nodes at different positions can be drawn with a pencil to obtain experimental results that are consistent with the theory, thus reducing the error of the experimental results.

[0022] Thirdly: The pull rod drives the abutment plate to retract into the mounting groove, causing the limiting teeth on it to separate from the groove. Without the restriction of the limiting teeth, the moving ring can be pulled up and down on the surface of the vertical rod. When the pull rod is released, the spring pushes the abutment plate back to its original position, causing the limiting teeth to engage with the groove, which can fix the moving ring and avoid stripping of threads when using bolts for fastening. Attached Figure Description

[0023] Figure 1 This is a front view structural diagram of the clothesline demonstration unit of the multifunctional demonstration device for middle school physics mechanics experiments proposed in this utility model.

[0024] Figure 2 This is a front view schematic diagram of the angular force demonstration unit of the multifunctional demonstration device for middle school physics mechanics experiments proposed in this utility model.

[0025] Figure 3 This utility model proposes a multifunctional demonstration device for middle school physics mechanics experiments. Figure 1 Schematic diagram of the side section structure.

[0026] Figure 4 This utility model proposes a multifunctional demonstration device for middle school physics mechanics experiments. Figure 2 Side view structural diagram.

[0027] Figure 5 This is a side-sectional schematic diagram of the moving ring structure of the multifunctional demonstration device for middle school physics mechanics experiments proposed in this utility model.

[0028] Figure 6 This utility model proposes a multifunctional demonstration device for middle school physics mechanics experiments. Figure 5 Enlarged structural diagram at point A in the middle.

[0029] In the attached image:

[0030] 1. Framework;

[0031] 2. Clothesline Demonstration Unit; 201. Horizontal Bar; 202. Connecting Sleeve; 203. Vertical Bar; 204. Moving Ring; 205. Hanging Peg; 206. First Test Rope; 207. Movable Pulley; 208. Hook; 209. Guide Slider;

[0032] 3. Angular force demonstration unit; 301. Fixed pulley; 302. Second test rope; 303. Hanging ring; 304. Suction cup;

[0033] 4. Hanging bracket body; 5. Mounting block; 6. Support plate; 7. Limiting tooth; 8. Pull rod; 9. Spring; 10. Magnetic suction plate; 11. Magnetic suction block. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Reference Figures 1-6 The multifunctional demonstration device for physics mechanics experiments in middle school includes a frame 1, inside which are a clothesline demonstration unit 2 and an angular force demonstration unit 3.

[0037] The clothesline demonstration unit 2 includes two horizontal bars 201 fixedly connected to the inner walls of both sides of the frame 1. Two symmetrical connecting sleeves 202 are fitted on the surface of each horizontal bar 201. A vertical bar 203 is installed between the upper and lower connecting sleeves 202. A movable ring 204 is slidably connected to the surface of the vertical bar 203. A fixing mechanism is provided on the surface of the movable ring 204. A hanging nail 205 is fixedly connected to the opposite face of each of the two movable rings 204. A first test rope 206 is connected between the two hanging nails 205. A movable pulley 207 is mounted on the surface of the first test rope 206. A hook 208 is fixedly connected to the lower surface of the movable pulley 207. A hanging weight body 4 is hung below the movable pulley 207 through the hook 208.

[0038] Reference Figure 2 and Figure 4 In a preferred embodiment, the angular force demonstration unit 3 includes two fixed pulleys 301 disposed inside the frame 1. The surfaces of the two fixed pulleys 301 are provided with a second test rope 302, and both ends of the second test rope 302 are fixedly connected with hanging rings 303.

[0039] The fixed pulley 301 is provided with a suction cup 304 on its back, which facilitates the loading and unloading of the fixed pulley 301.

[0040] Reference Figure 5 and Figure 6 In a preferred embodiment, the inner ring surface of the moving ring 204 is provided with a guide slider 209, and the surface of the vertical rod 203 is provided with a guide groove for the guide slider 209 to slide.

[0041] Guided by the guide slider 209, the moving ring 204 can smoothly slide in a directional manner on the surface of the vertical rod 203.

[0042] Reference Figure 5 and Figure 6 In a preferred embodiment, the fixing mechanism includes a mounting block 5 embedded on the front of the movable ring 204. The inner ring surface of the movable ring 204 has a mounting groove that extends through the mounting block 5. A backing plate 6 is provided inside the mounting groove. A limiting tooth 7 is provided on the back of the backing plate 6. A tooth groove that matches the limiting tooth 7 is provided on the surface of the vertical rod 203.

[0043] By setting the limiting teeth 7 and the tooth groove, the moving ring 204 can be fixed at a certain point on the surface of the vertical rod 203, so as to achieve the effect of limiting and fixing.

[0044] Reference Figure 5 and Figure 6 In a preferred embodiment, the front of the mounting block 5 has a sliding opening that extends into the mounting groove. The inner wall of the sliding opening is slidably connected to a pull rod 8 that is fixedly connected to the front of the abutment plate 6. A spring 9 is sleeved on the surface of the pull rod 8 inside the mounting groove. The two ends of the spring 9 are fixedly connected to the inner front wall of the mounting groove and the front of the abutment plate 6, respectively.

[0045] With the pull rod 8, the abutment 6 can be pulled back into the mounting groove, and the abutment 6 can be reset under the action of the spring 9.

[0046] Reference Figure 3 In a preferred embodiment, a magnetic plate 10 is embedded inside the shell on the back of the frame 1, and a magnetic block 11 that is magnetically attracted to the magnetic plate 10 is provided on the inner rear wall of the frame 1.

[0047] By using the magnetic block 11 and the magnetic plate 10, the paper can be fixed to the inner rear wall of the frame 1.

[0048] Working principle: During the clothesline experiment demonstration, the movable pulley 207 is fitted onto the first test rope 206, and both ends of the first test rope 206 are fixed to the hanging nails 205 on both sides. Then, the weight body 4 required for the experiment is hung on the hook 208 of the movable pulley 207. At this time, pulling the lever 8 on one side of the movable ring 204 causes the abutment plate 6 to retract into the mounting groove, separating the limiting tooth 7 from the tooth groove. Without the restriction of the limiting tooth 7, the movable ring 204 can be pulled up and down on the surface of the vertical rod 203. When the lever 8 is released, the spring 9 pushes the abutment plate 6 back to its original position, causing the limiting tooth 7 to engage in the tooth groove, thus fixing the movable ring 204. During the up and down movement of the movable ring 204, it drives... One end of the first test rope 206 moves synchronously, and the movement of the movable pulley 207 can be used to demonstrate the experimental phenomenon of the clothesline. When conducting the demonstration of the angular force experiment, the second test rope 302 is placed on the surface of the two fixed pulleys 301. The weights 4 of the required weight are hung at both ends of the second test rope 302 through the hanging ring 303, and another set of weights 4 of the required weight are hung in the middle of the second test rope 302. This achieves the demonstration of the angular force. At the same time, during the clothesline experiment and the angular force experiment, the paper is fixed to the inner rear wall of the frame 1 by the magnetic block 11 and the magnetic plate 10. The rope nodes at different positions can be drawn with a pencil to obtain experimental results that are consistent with the theory.

[0049] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A multifunctional demonstration device for physics mechanics experiments in middle school, characterized in that: Includes a frame (1), inside which are respectively a clothesline demonstration unit (2) and an angle force demonstration unit (3); The clothesline demonstration unit (2) includes two horizontal bars (201) fixedly connected to the inner walls of both sides of the frame (1). Two symmetrical connecting sleeves (202) are fitted on the surface of each horizontal bar (201). A vertical bar (203) is installed between the upper and lower connecting sleeves (202). A movable ring (204) is slidably connected to the surface of the vertical bar (203). A fixing mechanism is provided on the surface of the movable ring (204). A hanging nail (205) is fixedly connected to the opposite face of each of the two movable rings (204). A first test rope (206) is connected between the two hanging nails (205). A movable pulley (207) is mounted on the surface of the first test rope (206). A hook (208) is fixedly connected to the lower surface of the movable pulley (207). A hanging weight body (4) is hung below the movable pulley (207) through the hook (208). The mutual angle force demonstration unit (3) includes two fixed pulleys (301) set inside the frame (1). The surfaces of the two fixed pulleys (301) are provided with a second test rope (302). Both ends of the second test rope (302) are fixedly connected with hanging rings (303). The back of the fixed pulleys (301) is provided with suction cups (304).

2. The multifunctional demonstration device for middle school physics mechanics experiments according to claim 1, characterized in that, The inner ring surface of the moving ring (204) is provided with a guide slider (209), and the surface of the vertical rod (203) is provided with a guide groove for the guide slider (209) to slide.

3. The multifunctional demonstration device for middle school physics mechanics experiments according to claim 1, characterized in that, The fixing mechanism includes a mounting block (5) embedded in the front of the moving ring (204). The inner ring surface of the moving ring (204) has a mounting groove that extends through the mounting block (5). A backing plate (6) is provided inside the mounting groove. A limiting tooth (7) is provided on the back of the backing plate (6). A tooth groove that matches the limiting tooth (7) is provided on the surface of the vertical rod (203).

4. The multifunctional demonstration device for middle school physics mechanics experiments according to claim 3, characterized in that, The mounting block (5) has a sliding opening on its front side that extends into the mounting groove. The inner wall of the sliding opening is slidably connected to a pull rod (8) that is fixedly connected to the front side of the abutment plate (6). A spring (9) is sleeved on the surface of the pull rod (8) inside the mounting groove. The two ends of the spring (9) are fixedly connected to the inner front wall of the mounting groove and the front side of the abutment plate (6), respectively.

5. The multifunctional demonstration device for middle school physics mechanics experiments according to claim 1, characterized in that, A magnetic plate (10) is embedded inside the shell on the back of the frame (1), and a magnetic block (11) is provided on the inner rear wall of the frame (1) that is magnetically attracted to the magnetic plate (10).

Images