Isochronous circle demonstration instrument
By designing an isochronous circle demonstration instrument, using the circular frame, strings and ball displays the same-circular rules, the problem of the lack of an isochronous circle demonstration instrument in the middle school physics laboratory is solved, helping students to intuitively understand the isochronous circle knowledge.
Patent Information
- Application Number
- CN202420234674.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-31
AI Technical Summary
The lack of isometric circle demonstration instruments in the middle school physics laboratory has led to students being able to understand the theory and lack of intuitive experimental verification.
Design an isochronous circle demonstration instrument, including a circular frame, string and ball. By setting the ball to slide along different string tracks, it shows the isochronous circle rules.
Through obvious and intuitive demonstration experiments, students can help them understand the rules of time, break through key and difficult points, and deepen their understanding of knowledge.
Smart Images
Figure CN222440079U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of demonstrators, in particular to an isochronous circle demonstrator. Background Art
[0002] The "isochrone circle" model is a comprehensive application of middle school physics kinematics and Newton's laws in real life, and is a key and difficult point in middle school physics knowledge.
[0003] The law of isochronous circles is: the time taken for a ball to slide down from the highest point of a vertical circular ring from rest along different smooth chord tracks to the circumference is equal; the time taken for a ball to slide down from different points of a vertical circular ring from rest along smooth chord tracks to the lowest point of the circle is equal. The ball moves isochronously along each chord, and the movement time has nothing to do with the inclination or length of the chord.
[0004] However, the existing middle school physics laboratories lack the "isochrone circle" demonstrator, so it can only be proved through theory, and students' understanding of the knowledge of "isochrone circle" is not deep enough. Utility Model Content
[0005] The purpose of the utility model is to provide an isochrone circle demonstrator to solve the problem raised in the above background technology that the existing middle school physics laboratories lack an "isochrone circle" demonstrator, so they can only be proved through theory and students do not have a deep understanding of the knowledge of "isochrone circles".
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an isochrone circle demonstrator, comprising a cabinet, a base, a bracket fixedly connected to one side of the base, a through hole formed at one end of the top of the bracket, a hanging rope inserted into the through hole, a circular frame hung at the bottom end of the hanging rope, a hole one formed at the top of the circular frame, a hole two formed at the bottom of the circular frame, a hole three formed on one side of the circular frame, a hole four formed on the other side of the circular frame, a hole five formed on one side of the circular frame below the hole three, a hole six formed on the other side of the circular frame below the hole four, a string one inserted between the hole one and the hole two, a string two inserted between the hole one and the hole three, and a string three inserted between the hole one and the hole four.
[0007] When using an isochrone circle demonstrator of the present technical solution, by setting up the isochrone circle demonstrator, the time taken for a small ball to slide down from the highest point of a vertical circular ring from rest along different smooth chord tracks to the circumference is equal, and the time taken for a small ball to slide down from different points of a vertical circular ring from rest along smooth chord tracks to the lowest point of the circumference is equal. In teaching, obvious and intuitive demonstration experiments can be used to help students overcome key and difficult points and deepen their understanding of knowledge.
[0008] As a preferred technical solution of the utility model, the surface of the first string is sleeved with a ball first, the surface of the second string is sleeved with a ball second, the surface of the third string is sleeved with a ball third, the inner wall of the first hole is threadedly connected with a bolt first, both sides of the bottom of the circular frame are fixedly connected with connecting pieces, the surfaces of the two connecting pieces are threadedly connected with bolts two, the inner wall of the fourth hole is threadedly connected with bolts three, and the inner wall of the sixth hole is threadedly connected with bolts four. The isochrone law is proved by setting three small balls to slide on the corresponding strings respectively.
[0009] As a preferred technical solution of the utility model, one end of the string one is fixedly connected to bolt one, and the other end of the string one is fixedly connected to bolt two. Bolt one and bolt two are used to wind and fix the two ends of the string one.
[0010] As a preferred technical solution of the utility model, one end of the string 2 is fixedly connected to bolt 1, and the other end of the string 2 is fixedly connected to bolt 3. Bolt 1 and bolt 3 are used to wind and fix the two ends of the string 2.
[0011] As a preferred technical solution of the utility model, one end of the string three is fixedly connected to bolt two, and the other end of the string three is fixedly connected to bolt four. Bolt two and bolt four are used to wind and fix the two ends of the string three.
[0012] As a preferred technical solution of the utility model, the surfaces of the bolt 1, the bolt 2, the bolt 3 and the bolt 4 are all threadedly sleeved with nuts, which are used to tighten and limit the chords wound around the bolts.
[0013] As a preferred technical solution of the utility model, both sides of the bottom end of the base are fixedly connected with support blocks, which are arranged to support and elevate the base.
[0014] As a preferred technical solution of the utility model, a nameplate is fixedly connected to one side of the top of the base away from the bracket. The nameplate is used to introduce the information of the demonstrator.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. By setting up an isochrone circle demonstrator, three small balls slide down from rest along the smooth string track at the same time, and the time for the small balls to slide to the other end of the circle is equal. In teaching, through obvious and intuitive demonstration experiments, it can help students break through the key points and deepen their understanding of knowledge;
[0017] 2. Take one representative of the isochronism under different situations and display them in the same circle. In this way, an isochrone circle can demonstrate the isochronism under two situations. It is economical and practical. Steel guitar strings are used instead of tracks. Small and dense steel balls are used to reduce the influence of air resistance and sliding friction with the track, thereby improving the accuracy of the experiment. The circular bracket is made of bamboo embroidery frame, which is easy to find, light, easy to punch and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional diagram of the utility model;
[0019] Figure 2 It is a cross-sectional view of the circular frame of the utility model;
[0020] Figure 3 It is a partial cross-sectional view of the utility model.
[0021] In the figure: 1. base; 2. support block; 3. nameplate; 4. bracket; 5. perforation; 6. hanging rope; 7. round frame; 8. hole one; 9. hole two; 10. hole three; 11. hole four; 12. hole five; 13. hole six; 14. string one; 15. ball one; 16. string two; 17. ball two; 18. string three; 19. ball three; 20. connecting piece; 21. bolt one; 22. bolt two; 23. bolt three; 24. bolt four; 25. nut. DETAILED DESCRIPTION
[0022] 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.
[0023] See also Figure 1-3 The utility model provides an isochronous circle demonstrator, including a base 1, a bracket 4 is fixedly connected to one side of the base 1, a through hole 5 is opened at one end of the top of the bracket 4, a hanging rope 6 is inserted into the through hole 5, a circular frame 7 is hung at the bottom end of the hanging rope 6, and it is suspended to form a vertical circular surface, a hole 1 8 is opened at the top of the circular frame 7, a hole 2 9 is opened at the bottom of the circular frame 7, a hole 3 10 is opened on one side of the circular frame 7, a hole 4 11 is opened on the other side of the circular frame 7, a hole 5 12 is opened on one side of the circular frame 7 below the hole 3 10, a hole 6 13 is opened on the other side of the circular frame 7 below the hole 4 11, a string 14 is inserted between the hole 1 8 and the hole 2 9, a string 2 16 is inserted between the hole 1 8 and the hole 3 10, and a string 3 18 is inserted between the hole 1 8 and the hole 4 11, so as to form a track for the ball to run.
[0024] When in use, by setting up an isochrone circle demonstrator, three small balls slide down from rest along the smooth string track at the same time, and the time for the small balls to slide to the other end of the circle is equal. In teaching, the obvious and intuitive demonstration experiment can help students break through the key points and deepen their understanding of knowledge;
[0025] The surface of the string 14 is sleeved with a ball 15, the surface of the string 2 16 is sleeved with a ball 2 17, the surface of the string 3 18 is sleeved with a ball 3 19, the inner wall of the hole 18 is threadedly connected with a bolt 1 21, both sides of the bottom end of the circular frame 7 are fixedly connected with connecting pieces 20, the surfaces of the two connecting pieces 20 are threadedly connected with bolts 22, the inner wall of the hole 4 11 is threadedly connected with bolts 3 23, the inner wall of the hole 6 13 is threadedly connected with bolts 4 24, one end of the string 14 is fixedly connected with bolt 1 21, the other end of the string 14 is fixedly connected with bolt 22, one end of the string 2 16 is fixedly connected with bolt 1 21, the other end of the string 2 16 is fixedly connected with bolt 3 23, one end of the string 3 18 is fixedly connected with bolt 22, and the other end of the string 3 18 is fixedly connected with bolt 4 24, so as to play a role of installation;
[0026] When in use, the two ends of the guitar string are respectively wound and fixed on the bolts at the corresponding holes, so as to fix the position of the string, so that the ball 15 and the ball 2 17 slide down from the highest point of the circle along the smooth string track from rest, and the time for the small balls to slide to different intersections of the circle is equal, so that the ball 15 and the ball 3 19 slide down from different positions on the circle along the smooth string track from rest, and the time for the small balls to slide to the lowest end of the circle is equal;
[0027] The surfaces of bolt 1 21, bolt 2 22, bolt 3 23 and bolt 4 24 are all threadedly sleeved with nuts 25 to play a limiting role. Both sides of the bottom end of the base 1 are fixedly connected with support blocks 2 to play a supporting role. The top end of the base 1 is fixedly connected to one side away from the bracket 4 to play an introduction role.
[0028] When in use, after the end of the string is wound and fixed onto the bolt, the nut 25 is rotated to limit the position of the string to prevent it from shifting. The base 1 can be lifted by the provided support block 2 for easy operation. The surface of the provided nameplate 3 can be engraved with introduction information of the isochrone demonstrator to assist in identification.
[0029] When used specifically, the utility model is an isochronous circle demonstrator, the circular frame 7 is composed of a bamboo embroidery stretcher, has a certain thickness, an inner diameter of 39.0 cm, an outer diameter of 41.0 cm, the string is a stainless steel guitar string, with a diameter of 0.3 mm and a length of 50 cm, a stainless steel ball with a diameter of 12 mm and a central hole diameter of 2 mm, a stainless steel inverted L-shaped bracket 4 with a diameter of 6.6 mm, a length of 10.5 cm, and a height of 41.5 cm, a long wooden board base 1 with a length of 37.3 cm, a width of 15.2 cm, and a thickness of 1.5 cm, a hexagonal nut 25 with a specification of M8, find a diameter of the circular frame 7, use an electric drill to drill a hole 8 and a hole 9, continue to drill a hole 10 and a hole 11 at different heights on the left and right sides of this diameter, continue to drill a hole 12 and a hole 13 near the hole 10 and the hole 11, fix the bolts to the hole 8, the hole 9, the hole 12, and the hole 13, and fix one end of the two guitar strings on the circular On the top hole 8 corresponding to the diameter of the frame 7, the first string passes through the ball 15 and then passes through the bottom hole 2 9 corresponding to the diameter, and is wound around the bolt on the top to tighten the string and then tighten the nut 25. Another string passes through the ball 2 17 and then passes through the hole 3 10 on the left side of the circular frame 7, and is wound around the bolt to tighten the string and then tighten the nut 25. One end of the third string is fixed to the hole 2 9 corresponding to the diameter, and the other end passes through the ball 3 19 and then passes through the hole 4 11, and is wound around the bolt to tighten the string and then tighten the nut 25. A hole with a diameter of 7 mm is punched on the base 1, and the long end of the inverted L-shaped bracket 4 is inserted into the small hole and fixed. The other end is horizontally punched and threaded to suspend the circular frame 7, so that the ball 15 and the ball 2 17 slide down from the highest point of the circle along the smooth string track from rest, and the time for the small ball to slide to different intersections of the circle is equal, so that the ball 1 15 and the ball 3 19 slide down from rest along the smooth string track from different positions on the circle, and the time for the small ball to slide to the lowest end of the circle is equal.
[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. An isochrone circle demonstrator, comprising a base (1), characterized in that: A bracket (4) is fixedly connected to one side of the base (1); a through hole (5) is provided at one end of the top of the bracket (4); a hanging rope (6) is inserted through the through hole (5); a circular frame (7) is hung at the bottom end of the hanging rope (6); a hole 1 (8) is provided at the top of the circular frame (7); a hole 2 (9) is provided at the bottom end of the circular frame (7); a hole 3 (10) is provided on one side of the circular frame (7); and a hole 4 (11) is provided on the other side of the circular frame (7). A fourth hole (11) is provided, a fifth hole (12) is provided on one side of the circular frame (7) and is located below the third hole (10), a sixth hole (13) is provided on the other side of the circular frame (7) and is located below the fourth hole (11), a first string (14) is inserted between the first hole (8) and the second hole (9), a second string (16) is inserted between the first hole (8) and the third hole (10), and a third string (18) is inserted between the first hole (8) and the fourth hole (11).
2. The isochronous circle demonstrator according to claim 1, characterized in that: The surface of the string one (14) is sleeved with a ball one (15), the surface of the string two (16) is sleeved with a ball two (17), the surface of the string three (18) is sleeved with a ball three (19), the inner wall of the hole one (8) is threadedly connected with a bolt one (21), both sides of the bottom end of the circular frame (7) are fixedly connected with connecting pieces (20), the surfaces of the two connecting pieces (20) are threadedly connected with bolt two (22), the inner wall of the hole four (11) is threadedly connected with a bolt three (23), and the inner wall of the hole six (13) is threadedly connected with a bolt four (24).
3. The isochronous circle demonstrator according to claim 2, characterized in that: One end of the string one (14) is fixedly connected to bolt one (21), and the other end of the string one (14) is fixedly connected to bolt two (22).
4. The isochronous circle demonstrator according to claim 2, characterized in that: One end of the second string (16) is fixedly connected to the first bolt (21), and the other end of the second string (16) is fixedly connected to the third bolt (23).
5. The isochronous circle demonstrator according to claim 2, characterized in that: One end of the string three (18) is fixedly connected to the bolt two (22), and the other end of the string three (18) is fixedly connected to the bolt four (24).
6. The isochronous circle demonstrator according to claim 2, characterized in that: The surface of the first bolt (21), the surface of the second bolt (22), the surface of the third bolt (23) and the surface of the fourth bolt (24) are all threadedly sleeved with nuts (25).
7. The isochronous circle demonstrator according to claim 1, characterized in that: Support blocks (2) are fixedly connected to both sides of the bottom end of the base (1).
8. The isochronous circle demonstrator according to claim 1, characterized in that: A nameplate (3) is fixedly connected to a side of the top of the base (1) away from the bracket (4).