Electric field line distribution state demonstration device
By designing a demonstration device for electric field line distribution states including guide plates, movable blocks and hollow tubes, the problem of difficulty in intuitively displaying charge interactions in the prior art is solved, and the intuitive display of charge interactions is realized, which improves students' interest and understanding.
Patent Information
- Application Number
- CN202420169992.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-01-24
AI Technical Summary
The prior art is difficult to intuitively show students the interaction state of charges, which affects students' interests and understanding.
Design a demonstration device for the distribution of electric field lines, including a guide plate, a movable block, a driving mechanism and a hollow tube. Through the reverse movement of the movable block and the interaction of the plastic wires on the hollow tube, it displays the same charge and the heterogeneous charge. interaction state.
The intuitive display of the charge interaction state is achieved, which stimulates students' interest and improves students' understanding of charge interaction.
Smart Images
Figure CN222507035U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of physics teaching instruments, and in particular relates to a device for demonstrating the distribution state of electric field lines. Background Art
[0002] The interaction between electric charges is one of the first things students need to master when learning electricity. To demonstrate this phenomenon, two suspended charged balls are usually used. By watching the two balls attract or repel each other, it can be demonstrated that like charges repel each other and unlike charges attract each other.
[0003] This method cannot intuitively show students the interaction state of charges, which is not conducive to arousing students' interest and understanding. Utility Model Content
[0004] The utility model aims to provide a device for demonstrating the distribution state of electric field lines to solve the technical problems raised in the background technology.
[0005] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: an electric field line distribution state demonstration device, comprising a guide plate, and support feet arranged on both sides of the bottom of the guide plate, a groove is arranged in the middle part of the upper surface of the guide plate along its length direction, two symmetrically distributed movable blocks are arranged in the groove, and the two movable blocks can move in the opposite direction along the length direction of the guide plate, a driving mechanism for driving the movable blocks to move in the opposite direction is arranged in the guide plate, a hollow tube connected to the movable block for insertion and extraction is arranged at the top of the movable block, a pull rope penetrating the hollow tube is arranged in the hollow tube, and the top of the pull rope extends to the top of the hollow tube and is provided with a plurality of plastic wires;
[0006] The driving mechanism includes a screw rod, which is rotatably connected to the inner wall of the groove through a bearing, a worm wheel is sleeved on the middle part of the screw rod, a rotating shaft vertically distributed to the screw rod is provided in the middle part of the groove, a worm meshing with the worm wheel is provided on the rotating shaft, the rotating shaft is rotatably connected to the inner wall of the groove through a bearing, and a threaded block threadedly connected to the screw rod is provided at the bottom of the movable block. When in use, the worm is rotated by rotating the rotating shaft, so that the worm wheel drives the screw rod to rotate, so that the two movable blocks move in opposite directions at the same time under the action of the threaded block.
[0007] Preferably, the screw rod is divided into a left thread and a right thread at the middle portion, and the two threaded blocks are respectively threadedly connected to the left thread and the right thread. Through the setting of the left thread and the right thread, the two movable blocks can move in opposite directions at the same time.
[0008] Preferably, one end of the rotating shaft extends to the outside of the guide plate and is provided with a rotating wheel, and a crank is provided on the rotating wheel. By shaking the crank, the rotating wheel rotates, thereby rotating the rotating shaft.
[0009] Preferably, the inner walls on both sides of the groove are provided with sliding grooves along the length direction thereof, and sliders slidably connected to the sliding grooves are provided on both sides of the movable block. Through the cooperation between the sliders and the sliding grooves, a limiting effect is exerted on the movable block, making the movable block more stable when moving.
[0010] Preferably, a sleeve is provided in the middle of the upper surface of the movable block, and the inner diameter of the sleeve matches the outer diameter of the hollow tube. The provision of the sleeve facilitates the insertion of the hollow tube into the sleeve and the quick removal of the hollow tube from the sleeve.
[0011] Preferably, a notch is provided on one side of the bottom of the hollow tube, and the notch facilitates the bottom of the pull rope to be moved out of the notch.
[0012] The electric field line distribution state demonstration device of the utility model has the following advantages:
[0013] The utility model has a simple structure, is easy to operate and manufacture, and can intuitively show students the interaction state of like charges and unlike charges, which is beneficial to students' understanding, and can also liven up the classroom atmosphere and improve students' interest. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 It is a structural schematic diagram of a device for demonstrating the distribution state of electric field lines.
[0016] Figure 2 This is a right view of a guide plate in a device for demonstrating the distribution of electric field lines.
[0017] Figure 3 This is a schematic diagram of the structure of a guide plate in a device for demonstrating the distribution of electric field lines.
[0018] Figure 4 for Figure 3 A is an enlarged view of the middle image.
[0019] Figure 5 This is a schematic diagram of the structure of a hollow tube in a device for demonstrating the distribution of electric field lines.
[0020] Explanation of the markings in the figure: 1. Guide plate; 2. Support foot; 3. Groove; 4. Movable block; 5. Hollow tube; 6. Plastic wire; 7. Rotating shaft; 8. Rotating wheel; 9. Worm; 10. Worm wheel; 11. Lead screw; 12. Sleeve; 13. Slider; 14. Slide groove; 15. Pull rope. DETAILED DESCRIPTION
[0021] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.
[0022] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.
[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0024] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.
[0025] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.
[0026] In order to better understand the purpose, structure and function of the utility model, the electric field line distribution state demonstration device of the utility model is further described in detail below in conjunction with the accompanying drawings.
[0027] like Figure 1-5As shown, an electric field line distribution state demonstration device of the utility model comprises a guide plate 1 and support feet 2 arranged on both sides of the bottom of the guide plate 1. A groove 3 is arranged in the middle part of the upper surface of the guide plate 1 along its length direction. Two symmetrically distributed movable blocks 4 are arranged in the groove 3, and the two movable blocks 4 can move in opposite directions along the length direction of the guide plate 1. Slide grooves 14 are arranged on the inner walls of both sides of the groove 3 along its length direction. Slide blocks 13 slidably connected to the slide grooves 14 are arranged on both sides of the movable block 4. Through the cooperation between the slide block 13 and the slide groove 14, the movable block 4 is limited. The movable block 4 is used to make the movement of the movable block 4 more stable. A driving mechanism for driving the movable block 4 to move in the reverse direction is arranged in the guide plate 1. The driving mechanism includes a screw rod 11. The screw rod 11 is rotatably connected to the inner wall of the groove 3 through a bearing. A worm wheel 10 is sleeved on the middle part of the screw rod 11. A rotating shaft 7 vertically distributed with the screw rod 11 is arranged in the middle part of the groove 3. A worm 9 meshing with the worm wheel 10 is arranged on the rotating shaft 7. The rotating shaft 7 is rotatably connected to the inner wall of the groove 3 through a bearing. A threaded block threadedly connected with the screw rod 11 is arranged at the bottom of the movable block 4. When in use, by rotating the rotating shaft 7 , so that the worm 9 rotates, so that the worm wheel 10 drives the screw rod 11 to rotate, so that the two movable blocks 4 move in opposite directions at the same time under the action of the threaded block, the screw rod 11 is divided into a left thread and a right thread at the middle part, and the two threaded blocks are respectively threadedly connected with the left thread and the right thread. Through the setting of the left thread and the right thread, the two movable blocks 4 can move in opposite directions at the same time. One end of the rotating shaft 7 extends to the outside of the guide plate 1 and is provided with a rotating wheel 8. The rotating wheel 8 is provided with a crank. By shaking the crank, the rotating wheel 8 rotates, thereby rotating the rotating shaft 7, and the movable A hollow tube 5 connected to the block 4 for insertion and extraction is provided at the top, and a sleeve 12 is provided in the middle part of the upper surface of the movable block 4. The inner diameter of the sleeve 12 matches the outer diameter of the hollow tube 5. The setting of the sleeve 12 facilitates the insertion of the hollow tube 5 on the sleeve 12, and at the same time, facilitates the quick removal of the hollow tube 5 from the sleeve 12. A pull rope 15 passing through the hollow tube 5 is provided in the hollow tube 5, and the top of the pull rope 15 extends to the top of the hollow tube 5 and is provided with a plurality of plastic wires 6. A notch is provided on one side of the bottom of the hollow tube 5. The setting of the notch facilitates the removal of the bottom of the pull rope 15 from the notch.
[0028] The working principle of the utility model is:
[0029] When in the state, the plastic wire 6 is not charged;
[0030] The same charge: first take out one of the hollow tubes 5, unfold the plastic wire 6 on the hollow tube 5 and lay it flat on the table, then use wool to rub the plastic wire 6. The purpose of unfolding is to make the plastic wire 6 fully rubbed and charged, and the charge is negative. After rubbing, the plastic wire 6 will be tightly adsorbed on the table, indicating that the charging effect is good. Then pick up the hollow tube 5. At this time, the plastic wire on the hollow tube 5 is unfolded in a circular shape, like an electric field line. Then insert the hollow tube 5 into the sleeve 12 of the movable block 4. In the same way, the plastic wire 6 on the other hollow tube 5 is rubbed and charged, and it is also negatively charged. Insert it into the sleeve 12 on the other movable block 4, and then crank the handle by hand to make the rotating wheel 8 rotate. At this time, the two movable blocks 4 will slowly approach each other at the same time. When the two movable blocks 4 are getting closer and closer, the plastic wires 6 on the two hollow tubes 5 will repel each other.
[0031] Heterogeneous charges: In the same way as above, make the plastic filament 6 on one of the hollow tubes 5 negatively charged and insert it into the sleeve 12 on one of the movable blocks 4. Spread a plastic film flat on the table, then unfold the plastic filament 6 on the other hollow tube 5 and spread it on the plastic film, and rub the plastic filament 6 and the hollow tube 5 with the plastic film to make the plastic filament 6 positively charged. Then insert the hollow tube 5 into the sleeve 12 on the other movable block 4, and then crank the handle by hand to make the wheel 8 rotate. At this time, the two movable blocks 4 will slowly approach each other at the same time. When the two movable blocks 4 get closer and closer, the plastic filaments 6 on the two hollow tubes 5 will be adsorbed to each other.
[0032] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.
Claims
1. A device for demonstrating the distribution state of electric field lines, comprising a guide plate (1) and support legs (2) arranged on both sides of the bottom of the guide plate (1), characterized in that: A groove (3) is provided in the middle of the upper surface of the guide plate (1) along its length direction, and two symmetrically distributed movable blocks (4) are provided in the groove (3), and the two movable blocks (4) can move in opposite directions along the length direction of the guide plate (1), and a driving mechanism for driving the movable blocks (4) to move in opposite directions is provided in the guide plate (1), and a hollow tube (5) connected to the movable block (4) for insertion and withdrawal is provided at the top end of the movable block (4), and a pull rope (15) penetrating the hollow tube (5) is provided in the hollow tube (5), and the top end of the pull rope (15) extends to the top of the hollow tube (5) and is provided with a plurality of plastic wires (6); The driving mechanism comprises a screw (11), wherein the screw (11) is rotatably connected to the inner wall of the groove (3) via a bearing, a worm wheel (10) is sleeved on the middle part of the screw (11), a rotating shaft (7) vertically distributed with the screw (11) is arranged in the middle part of the groove (3), a worm (9) meshing with the worm wheel (10) is arranged on the rotating shaft (7), the rotating shaft (7) is rotatably connected to the inner wall of the groove (3) via a bearing, and a threaded block threadedly connected with the screw (11) is arranged at the bottom of the movable block (4).
2. The electric field line distribution state demonstration device according to claim 1, characterized in that: The screw rod (11) is divided into a left thread and a right thread at the middle portion, and the two thread blocks are threadedly connected to the left thread and the right thread respectively.
3. The electric field line distribution state demonstration device according to claim 2, characterized in that: One end of the rotating shaft (7) extends to the outside of the guide plate (1) and is provided with a rotating wheel (8), and a crank is provided on the rotating wheel (8).
4. The electric field line distribution state demonstration device according to claim 1, characterized in that: The inner walls on both sides of the groove (3) are provided with sliding grooves (14) along the length direction thereof, and the two sides of the movable block (4) are provided with sliding blocks (13) slidably connected to the sliding grooves (14).
5. The electric field line distribution state demonstration device according to claim 1, characterized in that: A sleeve (12) is provided in the middle of the upper surface of the movable block (4), and the inner diameter of the sleeve (12) matches the outer diameter of the hollow tube (5).
6. The electric field line distribution state demonstration device according to claim 1, characterized in that: A notch is provided on one side of the bottom of the hollow tube (5).