Free falling body demonstration device for physics teaching

Abstract

The utility model discloses a free fall demonstration device for physics teaching, and relates to the technical field of teaching tools. The device comprises a transparent sleeve, wherein a release mechanism and a buffer mechanism are arranged on the transparent sleeve; a pull rod is slidably connected to the inner wall of the top of the transparent sleeve, the top of the pull rod slidably extends out of the transparent sleeve, a demonstration block is arranged in the transparent sleeve, the release mechanism comprises a first release assembly and a second release assembly, and the first release assembly comprises two trapezoidal sliding grooves formed in the inner wall of the transparent sleeve. According to the utility model, through the arrangement of the release mechanism, the problems that in the use process of the existing free falling body demonstration device for physics teaching, the angle of the device is always directly rotated by a teacher, the release time of an object in each experiment is difficult to ensure to be completely consistent, the measurement of the falling time is inaccurate, and the measurement accuracy is high are solved. And accurate exploration of the motion law of the free falling body is influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the teaching tool technical field, especially, a kind of free fall demonstration device for physics teaching. BACKGROUND

[0002] In physics teaching, free fall motion is a very important knowledge point, it is the key to understand gravity, acceleration and other basic physical concepts and uniform variable speed straight line motion law, however, traditional teaching method faces many challenges when explaining this concept, simply rely on theoretical derivation and board writing explanation, for the students whose abstract thinking has not matured completely, it is difficult to understand, therefore, it is urgent to need a kind of intuitive, vivid and accurate demonstration device to assist teaching, help students break through cognitive barrier, and deeply understand the essential characteristics of free fall motion.

[0003] But the existing free fall demonstration device for physics teaching in use, often rely on the angle of device is rotated directly by teacher, it is difficult to guarantee the release time of object in each experiment completely consistent, leading to the measurement of falling time is inaccurate, in turn influence the accurate exploration to free fall motion law. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of free fall demonstration device for physics teaching, by setting release mechanism, the existing free fall demonstration device for physics teaching in use, often rely on the angle of device is rotated directly by teacher, it is difficult to guarantee the release time of object in each experiment completely consistent, leading to the measurement of falling time is inaccurate, in turn influence the accurate exploration to free fall motion law problem.

[0005] To solve the above technical problems, the utility model is realized by the following technical schemes:

[0006] The utility model is a kind of free fall demonstration device for physics teaching, including transparent sleeve, release mechanism and buffer mechanism are provided on the transparent sleeve;

[0007] The top inner wall of the transparent sleeve is slidably connected with pull rod, the top of the pull rod is slidably extended to the outside of the transparent sleeve, the inside of the transparent sleeve is provided with demonstration block, the release mechanism includes release assembly one and release assembly two, the release assembly one includes two trapezoidal sliding grooves opened on the inner wall of the transparent sleeve, the inner wall of two trapezoidal sliding grooves is slidably connected with slide bar one.

[0008] Further, the side of two slide bars one close to each other is fixedly connected with rectangular support plate, the top of two rectangular support plates is fixedly connected with rectangular connecting plate, and the top of the rectangular connecting plate is fixedly connected with pull rod.

[0009] Further, the release assembly two comprises two special-shaped connecting rods hingedly arranged between two rectangular supporting plates, and two spring one are fixedly connected between the two special-shaped connecting rods.

[0010] Further, the buffer mechanism comprises a buffer assembly one and a buffer assembly two, the buffer assembly one comprises a partition plate slidingly connected to the inner wall of the transparent sleeve, and a plurality of telescopic rods are fixedly connected to the bottom inner wall of the transparent sleeve, and the top of the telescopic rods are fixedly connected to the partition plate.

[0011] Further, a plurality of spring two are sleeved on the outer wall of the telescopic rods, the top of the spring two are fixedly connected to the partition plate, the bottom of the spring two are fixedly connected to the transparent sleeve, and two rectangular supporting blocks are fixedly connected to the bottom inner wall of the transparent sleeve.

[0012] Further, the buffer assembly two comprises a sliding rod two fixedly connected between the two rectangular supporting blocks, and a moving block is slidingly connected to the outer wall of the sliding rod two.

[0013] Further, a spring three is sleeved on the outer wall of the sliding rod two, and the left side and the right side of the spring three are fixedly connected to the two moving blocks, respectively, the top of the two moving blocks are hingedly provided with connecting rods, and the top of the two connecting rods are hingedly connected to the partition plate.

[0014] The utility model has the following beneficial effects:

[0015] 1. By setting release mechanism, when need to demonstrate, can pull the pull rod, make it through the rectangular connecting plate drive rectangular supporting plate under the action of sliding rod one in trapezoidal sliding groove, thereby drive two special-shaped connecting rod on the demonstration block upwardly moves, because the top inner wall of transparent sleeve is inclined design, when special-shaped connecting rod upwardly moves and meets the inclination, will under the action of the inclination, the bottom swings, because the swing of bottom, two special-shaped connecting rods will release the demonstration block that has been clamped, and observe its free fall process, so that the teacher can accurately start experiment after preparing observation and recording device, can better control experiment starting time, make the starting condition of each experiment more consistent, be favorable to accurate measurement demonstration block falling time, speed and other physical quantity, make the position and posture of demonstration block before release more stable and consistent, guarantee the scientific nature of experiment;

[0016] 2. By setting the buffer mechanism, when the demonstration block falls on the partition plate, the partition plate will move downward under the gravity of the demonstration block, at this time the telescopic rod and spring two will buffer this gravity, and due to the descent of the partition plate, the two moving blocks will approach each other under the connection of the two connecting rods, and compress spring three, thereby further increasing the buffering effect of the device, reducing the fatigue degree of the telescopic rod and spring two, effectively reducing the impact force of the demonstration block on the bottom of the device, avoiding damage to the demonstration block due to collision, preventing it from breaking or damaging the internal structure, reducing damage to the device, and prolonging the service life of the device.

[0017] Of course, it is not necessary for any product implementing the present application to achieve all the advantages mentioned above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a schematic diagram of the front side cross-sectional structure of the present application;

[0021] Figure 3 It is a schematic diagram of the local cross-sectional structure of the release mechanism of the present application;

[0022] Figure 4 It is a schematic diagram of the local cross-sectional structure of the buffer mechanism of the present application;

[0023] Figure 5 It is a schematic diagram of the local cross-sectional structure of the present application Figure 2 A is an enlarged structure diagram;

[0024] Figure 6 It is a schematic diagram of the local cross-sectional structure of the present application Figure 2 B is an enlarged structure diagram.

[0025] In the drawings, the components represented by each reference numeral are listed as follows:

[0026] 1, transparent sleeve; 101, pull rod; 102, demonstration block; 2, release mechanism; 21, release assembly one; 211, trapezoidal sliding groove; 212, sliding rod one; 213, rectangular support plate; 214, rectangular connecting plate; 22, release assembly two; 221, special-shaped connecting rod; 222, spring one; 3, buffer mechanism; 31, buffer assembly one; 311, partition; 312, telescopic rod; 313, spring two; 314, rectangular support block; 32, buffer assembly two; 321, sliding rod two; 322, moving block; 323, spring three; 324, connecting rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Please refer to Figures 1-5 As shown in the figure, the present application is a free-fall demonstration device for physics teaching, which comprises a transparent sleeve 1, a release mechanism 2 and a buffer mechanism 3 are arranged on the transparent sleeve 1, a pull rod 101 is slidably connected to the inner wall of the top of the transparent sleeve 1, the top of the pull rod 101 extends out of the transparent sleeve 1, a demonstration block 102 is arranged in the transparent sleeve 1, the release mechanism 2 comprises a release assembly one 21 and a release assembly two 22, the release assembly one 21 comprises two trapezoidal sliding grooves 211 arranged on the inner wall of the transparent sleeve 1, a sliding rod one 212 is slidably connected to the inner wall of each of the two trapezoidal sliding grooves 211, a rectangular support plate 213 is fixedly connected to one side of each of the two sliding rod ones 212 which are close to each other, a rectangular connecting plate 214 is fixedly connected to the top of each of the two rectangular support plates 213, the top of the rectangular connecting plate 214 is fixedly connected with the pull rod 101, the release assembly two 22 comprises two special-shaped connecting rods 221 which are hingedly arranged between the two rectangular support plates 213, a spring one 222 is fixedly connected between the two special-shaped connecting rods 221, by arranging the release mechanism 2, the teacher can accurately start the experiment after preparing the observation and recording device, the starting time of the experiment can be better controlled, the starting conditions of each experiment are more consistent, which is beneficial to accurately measuring the physical quantities such as the falling time and speed of the demonstration block 102, the position and posture of the demonstration block 102 before release are more stable and consistent, and the scientificity of the experiment is ensured.

[0029] The buffering mechanism 3 comprises a buffering assembly one 31 and a buffering assembly two 32. The buffering assembly one 31 comprises a partition plate 311 slidably connected to the inner wall of the transparent sleeve 1. A plurality of telescopic rods 312 are fixedly connected to the bottom inner wall of the transparent sleeve 1. The top portions of the telescopic rods 312 are fixedly connected to the partition plate 311. A plurality of spring two 313 are sleeved on the outer wall of the telescopic rods 312. The top portions of the spring two 313 are fixedly connected to the partition plate 311. The bottom portions of the spring two 313 are fixedly connected to the transparent sleeve 1. Two rectangular support blocks 314 are fixedly connected to the bottom inner wall of the transparent sleeve 1. The buffering assembly two 32 comprises a sliding rod two 321 fixedly connected between the two rectangular support blocks 314. The sliding rod two 321 is slidably connected with two moving blocks 322 on the outer wall. The sliding rod two 321 is sleeved with a spring three 323. The left side and the right side of the spring three 323 are fixedly connected with the two moving blocks 322 respectively. The top portions of the two moving blocks 322 are hingedly provided with a connecting rod 324. The top portions of the two connecting rods 324 are hingedly connected with the partition plate 311. Through the buffering mechanism 3, the impact force of the demonstration block 102 on the bottom of the device can be effectively reduced, the demonstration block 102 can be prevented from being damaged due to collision, the internal structure can be prevented from being broken or damaged, the damage to the device can be reduced, and the service life of the device can be prolonged.

[0030] One specific application of the embodiment is: in use, first place the device in the corresponding position, pull the pull rod 101, make it pass through the rectangular connecting plate 214 to drive the rectangular supporting plate 213 to slide in the trapezoidal sliding groove 211 under the action of the sliding rod 212, thereby driving the demonstration block 102 on the two special connecting rods 221 to move upwards, since the inner wall of the top of the transparent sleeve 1 is designed to be inclined, when the special connecting rod 221 moves upwards and hits the inclination, the bottom will swing under the action of the inclination, due to the swing of the bottom, the two special connecting rods 221 will release the demonstration block 102 which has been clamped, and the process of free fall of the demonstration block 102 can be observed, so that the teacher can accurately start the experiment after preparing to observe and record the device, the starting time of the experiment can be better controlled, the starting conditions of each experiment are more consistent, which is beneficial to accurately measuring the physical quantities such as the falling time and speed of the demonstration block 102, the position and attitude of the demonstration block 102 before release are more stable and consistent, the scientificity of the experiment is ensured, when the demonstration block 102 falls on the partition plate 311, the partition plate 311 will move downwards under the action of the gravity of the demonstration block 102, at this time, the telescopic rod 312 and the spring two 313 will buffer this gravity, and due to the descent of the partition plate 311, the two moving blocks 322 will approach each other under the connection of the two connecting rods 324, and compress the spring three 323, thereby further increasing the buffering effect of the device, reducing the fatigue degree of the telescopic rod 312 and the spring two 313, effectively reducing the impact force of the demonstration block 102 on the bottom of the device, avoiding damage to the demonstration block 102 due to collision, preventing the demonstration block 102 from being broken or damaged internally, reducing damage to the device, and prolonging the service life of the device.

[0031] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, nor limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited by the claims and their entire scope and equivalents.

Claims

1. A free-fall demonstration device for physics teaching, comprising a transparent sleeve (1), characterized in that: The transparent sleeve (1) is provided with a release mechanism (2) and a buffer mechanism (3); A pull rod (101) is slidably connected to the top inner wall of the transparent sleeve (1), and the top of the pull rod (101) extends slidably to the outside of the transparent sleeve (1). A demonstration block (102) is provided inside the transparent sleeve (1). The release mechanism (2) includes a release component one (21) and a release component two (22). The release component one (21) includes two trapezoidal grooves (211) opened on the inner wall of the transparent sleeve (1), and a slide rod one (212) is slidably connected to the inner wall of each of the two trapezoidal grooves (211).

2. The free fall demonstration device for physics teaching according to claim 1, characterized in that, A rectangular support plate (213) is fixedly connected to one side of each of the two sliding rods (212) that are close to each other. A rectangular connecting plate (214) is fixedly connected to the top of the two rectangular support plates (213). The top of the rectangular connecting plate (214) is fixedly connected to the pull rod (101).

3. The free fall demonstration device for physics teaching according to claim 2, characterized in that, The second release component (22) includes two irregularly shaped connecting rods (221) hinged between two rectangular support plates (213), and a spring (222) is fixedly connected between the two irregularly shaped connecting rods (221).

4. The free fall demonstration device for physics teaching according to claim 3, characterized in that, The buffer mechanism (3) includes a first buffer assembly (31) and a second buffer assembly (32). The first buffer assembly (31) includes a partition (311) slidably connected to the inner wall of the transparent sleeve (1). Several telescopic rods (312) are fixedly connected to the bottom inner wall of the transparent sleeve (1), and the tops of the several telescopic rods (312) are fixedly connected to the partition (311).

5. The free fall demonstration device for physics teaching according to claim 4, characterized in that, A spring 2 (313) is fitted on the outer wall of each of the telescopic rods (312). The top of each of the spring 2 (313) is fixedly connected to the partition plate (311). The bottom of each of the spring 2 (313) is fixedly connected to the transparent sleeve (1). Two rectangular support blocks (314) are fixedly connected to the bottom inner wall of the transparent sleeve (1).

6. The free fall demonstration device for physics teaching according to claim 5, characterized in that, The second buffer assembly (32) includes a second slide bar (321) fixedly connected between two rectangular support blocks (314), and a movable block (322) is slidably connected to the outer wall of the second slide bar (321).

7. A free-fall demonstration device for physics teaching according to claim 6, characterized in that, A spring three (323) is sleeved on the outer wall of the slide bar two (321). The left and right sides of the spring three (323) are fixedly connected to two moving blocks (322) respectively. The top of each of the two moving blocks (322) is hinged with a connecting rod (324), and the top of each of the two connecting rods (324) is hinged to the partition plate (311).

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