Demonstrator for physical free fall

Abstract

The utility model discloses a demonstrator for physical free fall, which belongs to the technical field of free fall demonstration devices, and is characterized in that the surface of a demonstrator shell is provided with scale marks, the side surface of the demonstrator shell is rotatably connected with an adjusting shaft through a sealing bearing, and the surface of the adjusting shaft is connected with two threaded sleeves through threads; the demonstrator comprises a demonstrator shell, two threaded sleeves are arranged in the demonstrator shell, a first baffle and a second baffle are fixedly connected to the surfaces of the two threaded sleeves respectively, an upper cover is inserted into one end of the demonstrator shell, and a first placement groove and a second placement groove are formed in the surface of the upper cover. According to the circulating demonstrator, the demonstrating objects can be rapidly and circularly demonstrated, the use convenience is greatly improved, the adjusting shaft, the guide rod and the knob are arranged, a user can conveniently and synchronously control the moving positions of the two baffles, the two demonstrating objects can synchronously fall off, and the demonstrating effect is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of free fall demonstration devices, and more specifically, to a demonstrator for physical free fall. Background Technology

[0002] Free fall is a compulsory course in high school physics. Free fall refers to the motion of a regular object with an initial velocity of zero under the influence of gravity alone. Common physics free fall demonstration devices require two hands to control the drop of two objects, which may cause the two objects to fall out of sync, reducing the demonstration effect. Furthermore, it is not easy to perform rapid cyclic demonstrations, causing inconvenience to the user.

[0003] For example, the free fall demonstration device for high school physics disclosed in announcement number CN211403804U includes a box body, with a first fastening mechanism and a second fastening mechanism fixed at the left and right ends of the box body, and a first baffle and a second baffle fixed at symmetrical positions on the upper inner wall of the box body.

[0004] As can be seen from the above-disclosed scheme, during the demonstration, the first and second demonstration objects require two hands to control the first and second fastening mechanisms to release their grip and allow them to fall. However, the user's two hands may cause the first and second demonstration objects to fall out of sync, reducing the demonstration effect. Furthermore, the fallen first and second demonstration objects need to be removed from the device and then clamped back to the first and second fastening mechanisms before the next demonstration can be performed, which is not convenient for rapid cyclical demonstrations and causes inconvenience to the user. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a demonstrator for physical free fall. This demonstrator, through its designed discharge port, receiving slot, inclined surface, and placement slot, can quickly perform cyclic demonstrations of the object, greatly improving ease of use. Furthermore, the designed adjustment shaft, guide rod, and knob facilitate the user's simultaneous control of the movement of the two baffles, allowing the two objects to fall synchronously and improving the demonstration effect.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A demonstrator for physical free fall includes a demonstrator housing with graduated lines on its surface. An adjusting shaft is rotatably connected to the side of the housing via a sealed bearing. Two threaded sleeves are threadedly connected to the surface of the adjusting shaft, and a first baffle and a second baffle are fixedly connected to the surfaces of the two threaded sleeves, respectively. A top cover is inserted into one end of the demonstrator housing, and the surface of the top cover has a first placement groove and a second placement groove. Both the first and second placement grooves have through holes at their bottoms, and one end of each through hole contacts the surfaces of the first and second baffles, respectively. A base is inserted into the other end of the demonstrator housing, and the surface of the base has a storage groove and a mounting groove communicating with the storage groove. This demonstrator for physical free fall, through its discharge port, storage groove, inclined surface, and placement groove, allows for rapid cyclical demonstration of the object, greatly improving ease of use. Furthermore, the adjusting shaft, guide rod, and knob facilitate simultaneous control of the two baffles by the user, allowing the two objects to fall synchronously, thus improving the demonstration effect.

[0008] Furthermore, a buffer pad is fixedly connected to the bottom of the mounting groove. The surface of the buffer pad is provided with an inclined surface. The buffer pad is made of elastic buffer rubber. The side of the buffer pad contacts and presses against the inner wall of the demonstrator housing. The buffer pad can buffer the falling demonstrator and automatically push it out of the demonstrator housing through the inclined surface.

[0009] Furthermore, a guide rod is fixedly connected to the inner wall of the demonstrator housing, and the sides of the first baffle and the second baffle are provided with coaxial guide holes. The inner wall of the guide hole is slidably connected to the surface of the guide rod, and the guide rod can ensure the movement stability of the first baffle and the second baffle.

[0010] Furthermore, the bottom of the top cover is provided with an insert block, and the surface of the insert block is provided with a hole coaxial with the through hole. The axis of the hole is located at the center position between the guide rod and the adjustment shaft, so that the guide rod and the adjustment shaft will not affect the falling of the demonstration object.

[0011] Furthermore, the cross-sectional shape of the demonstrator housing is frame-shaped, and one end of the demonstrator housing is provided with a discharge port, which is connected to the storage slot, so that the demonstrator can enter the storage slot through the discharge port.

[0012] Furthermore, two knobs are provided at both ends of the adjustment shaft, and the surface of the knobs is provided with anti-slip grooves to facilitate manual rotation of the adjustment shaft.

[0013] Furthermore, each of the two threaded sleeves has a threaded hole at one end, and the internal threads of the two threaded holes are in opposite directions, so that when the adjusting shaft is rotated, the two threaded sleeves can move synchronously in opposite directions.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution can quickly circulate the demonstration of the demonstration object by setting the discharge port, storage slot, inclined surface and placement slot, which greatly improves the convenience of use.

[0016] (2) The adjustment shaft, guide rod and knob set in this solution make it easy for users to control the movement of the two baffles at the same time, so that the two demonstration objects can fall at the same time, which improves the demonstration effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the overall structure of this utility model;

[0018] Figure 2 This is a perspective view of the demonstrator housing structure of this utility model;

[0019] Figure 3 This is a perspective view of the upper cover structure of this utility model;

[0020] Figure 4 This is a perspective view of the base structure of this utility model;

[0021] Figure 5 for Figure 4 A cross-sectional view of the base structure.

[0022] Explanation of the labels in the diagram:

[0023] 1. Demonstrator housing, 11. Scale line, 12. Discharge port, 13. Adjustment shaft, 14. Knob, 2. First baffle, 3. Second baffle, 31. Threaded sleeve, 32. Guide rod, 4. Top cover, 41. First placement slot, 42. Second placement slot, 43. Through hole, 5. Base, 51. Storage slot, 52. Mounting slot, 53. Buffer pad, 54. Inclined surface. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figure 1-5A demonstrator for physical free fall includes a demonstrator housing 1 made of highly transparent engineering plastic to facilitate viewing the fall demonstration of two internal objects. The surface of the demonstrator housing 1 is provided with scale lines 11. An adjusting shaft 13 is rotatably connected to the side of the demonstrator housing 1 via a sealed bearing. Two knobs 14 are provided at both ends of the adjusting shaft 13, allowing the user to control the rotation of the adjusting shaft 13 using either their left or right hand. The surfaces of the knobs 14 are provided with anti-slip grooves for easy manual rotation of the adjusting shaft 13. Two threaded sleeves 31 are threadedly connected to the surface of the adjusting shaft 13. One end of each threaded sleeve 31 has a threaded hole, and the internal threads of the two threaded holes are in opposite directions, facilitating rotation of the adjusting shaft 13 so that the two threaded sleeves 31... 1. The two threaded sleeves 31 are synchronously reversed and fixedly connected to the surfaces of the first baffle 2 and the second baffle 3 respectively. The first baffle 2 and the second baffle 3 are used to block the lower outlet of the two through holes 43. One end of the demonstrator housing 1 is inserted with the top cover 4. The surface of the top cover 4 is provided with the first placement groove 41 and the second placement groove 42. The bottom of the first placement groove 41 and the second placement groove 42 are provided with through holes 43. One end of the two through holes 43 is respectively in contact with the surface of the first baffle 2 and the second baffle 3. The other end of the demonstrator housing 1 is inserted with the base 5. The surface of the base 5 is provided with the storage groove 51 and the mounting groove 52 connected to the storage groove 51. The mounting groove 52 is convenient to be inserted into the demonstrator housing 1. The insertion position is fixed by the compression elastic force generated by squeezing the buffer pad 53.

[0027] A buffer pad 53 is fixedly connected to the bottom of the mounting slot 52. The surface of the buffer pad 53 is provided with an inclined surface 54. The buffer pad 53 is made of elastic buffer rubber. The side of the buffer pad 53 contacts and presses against the inner wall of the demonstrator housing 1. The buffer pad 53 can buffer the falling demonstrator and automatically guide it out of the demonstrator housing 1 through the inclined surface 54. A guide rod 32 is fixedly connected to the inner wall of the demonstrator housing 1. The sides of the first baffle 2 and the second baffle 3 are provided with coaxial guide holes. The inner wall of the guide hole is slidably connected to the surface of the guide rod 32. The guide rod 32 can ensure the movement stability of the first baffle 2 and the second baffle 3.

[0028] The bottom of the top cover 4 is provided with an insert block. The surface of the insert block is provided with a hole coaxial with the through hole 43. The axis of the hole is located at the center between the guide rod 32 and the adjustment shaft 13, so that the guide rod 32 and the adjustment shaft 13 will not affect the falling of the demonstration object. The cross-sectional shape of the demonstrator housing 1 is frame-shaped. One end of the demonstrator housing 1 is provided with a discharge port 12, which is connected to the storage slot 51, so that the demonstration object can enter the storage slot 51 through the discharge port 12.

[0029] When using this physical free-fall demonstrator, first place two demonstrators in the two placement slots so that the demonstrators automatically enter the through-hole 43 and the bottoms of the two demonstrators contact the surfaces of the first baffle 2 and the second baffle 3, respectively. Then, use the right hand to adjust the shaft 13 counterclockwise. The adjustment shaft 13 rotates counterclockwise so that the two threaded sleeves 31 move away from the center of the demonstrator housing 1, thereby causing the first baffle 2 and the second baffle 3 to move away from the through-hole 43. This causes the two through-holes 43 to open simultaneously, allowing the two demonstrators to fall synchronously. The falling demonstrators are cushioned by the buffer pad 53 and then guided into the collection slot 51. When the user needs to demonstrate free fall again, the two demonstrators can be removed, and the right hand can be rotated clockwise to block the bottom of the through-hole 43. Then, the two demonstrators can be placed in the two placement slots respectively and the demonstration can be performed as described above.

[0030] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A demonstrator for physical free fall, comprising a demonstrator housing (1), wherein the surface of the demonstrator housing (1) is provided with scale lines (11), characterized in that: The side of the demonstrator housing (1) is rotatably connected to an adjusting shaft (13) via a sealed bearing. The surface of the adjusting shaft (13) is connected to two threaded sleeves (31) via threads. The surfaces of the two threaded sleeves (31) are respectively fixedly connected to a first baffle (2) and a second baffle (3). One end of the demonstrator housing (1) is inserted with a top cover (4). The surface of the top cover (4) is provided with a first placement groove (41) and a second placement groove (42). The bottom of the first placement groove (41) and the second placement groove (42) are both provided with through holes (43). One end of the two through holes (43) is respectively in contact with the surface of the first baffle (2) and the second baffle (3). The other end of the demonstrator housing (1) is inserted with a base (5). The surface of the base (5) is provided with a storage groove (51) and an installation groove (52) connected to the storage groove (51).

2. The demonstrator for physical free fall according to claim 1, characterized in that: A buffer pad (53) is fixedly connected to the bottom of the mounting groove (52). The surface of the buffer pad (53) is provided with an inclined surface (54). The buffer pad (53) is made of elastic buffer rubber. The side of the buffer pad (53) contacts and is pressed against the inner wall of the demonstrator housing (1).

3. A demonstrator for physical free fall according to claim 1, characterized in that: The inner wall of the demonstrator housing (1) is fixedly connected to a guide rod (32), and the sides of the first baffle (2) and the second baffle (3) are provided with coaxial guide holes, and the inner wall of the guide hole is slidably connected to the surface of the guide rod (32).

4. A demonstrator for physical free fall according to claim 3, characterized in that: The bottom of the upper cover (4) is provided with an insert block, and the surface of the insert block is provided with a hole coaxial with the through hole (43). The axis of the hole is located at the center position between the guide rod (32) and the adjusting shaft (13).

5. A demonstrator for physical free fall according to claim 1, characterized in that: The cross-sectional shape of the demonstrator housing (1) is frame-shaped, and one end of the demonstrator housing (1) is provided with a discharge port (12), which is connected to the storage groove (51).

6. A demonstrator for physical free fall according to claim 1, characterized in that: The adjusting shaft (13) has two knobs (14) at both ends, and the surface of the knobs (14) is provided with anti-slip grooves.

7. A demonstrator for physical free fall according to claim 1, characterized in that: Both of the threaded sleeves (31) have a threaded hole at one end, and the internal threads of the two threaded holes are in opposite directions.

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