Pendulum teaching device

Abstract

The utility model discloses a pendulum teaching device, which comprises a support (1) and a weight (4) used as a pendulum bob, the support (1) comprises a supporting seat (11) and a vertical rod (12), the vertical rod (12) is provided with a first mounting seat (2), the first mounting seat (2) is provided with a tape measure (3), the tape measure (3) comprises a box body (31) and a flexible ruler (32) wound and installed in the box body (31), and the flexible ruler (32) is provided with a second mounting seat (32). One end of the flexible ruler (32) vertically extends downwards to serve as a swing rope, and the extending end of the flexible ruler (32) is connected with the heavy object (4); an anti-winding plate (5) is mounted at the bottom of the first mounting seat (2), is positioned between the flexible ruler (32) and the vertical rod (12), and has a certain width. According to the utility model, the condition that the swing rope winds the bracket or collides with the bracket when the heavy object deflects in the experiment process is avoided.

Description

Technical Field

[0001] The utility model relates to a teaching instrument, in particular to a pendulum teaching device. Background Art

[0002] In the third unit of the fifth-grade elementary science textbook, Volume 1 (2017 edition), titled "Making a Pendulum," students will create a pendulum that swings exactly 60 times per minute. Using materials such as an iron stand (as a support), a thin string (as the pendulum rope), and an iron ball (as the pendulum), they will adjust the number of swings per minute by repeatedly adjusting the length of the string.

[0003] During the swing of existing pendulums made of string, such as the simple pendulum and Foucault pendulum demonstration teaching aids with timed counting functions disclosed in Chinese utility model CN208589181U, the string sometimes changes direction, slowly approaching the iron stand, entangled with the stand, or colliding with it. Furthermore, if the pendulum ball deviates from its starting position during swing, the string's deviation increases with the number of swings, potentially entangled with the magnifying protractor. Furthermore, the fixed-length string cannot be adjusted at will, making it inconvenient to use in actual teaching experiments.

[0004] Chinese utility model CN202404802U discloses a single-pendulum device for measuring gravitational acceleration, which includes a bracket, a cycloid, a weight, and a counter. By setting a sensor on the cycloid, the number of swings can be counted. However, it still cannot overcome the problem that the cycloid is prone to entanglement with the bracket or collision with the bracket when swinging, and the length of the cycloid cannot be adjusted at any time. Utility Model Content

[0005] The utility model aims to provide a pendulum teaching device to solve the problem that the cycloid is easily entangled and deflected during teaching experiments.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A pendulum teaching device comprises a bracket and a weight serving as a pendulum, wherein the bracket comprises a support base and a vertical rod, wherein:

[0008] A first mounting seat is provided on the vertical rod, and a measuring tape is mounted on the first mounting seat. The measuring tape includes a box body and a flexible ruler wound and mounted in the box body. One end of the flexible ruler extends vertically downward as a swing rope, and the ruler surface of the flexible ruler is perpendicular to the plane of the swing direction of the flexible ruler. The protruding end of the flexible ruler is connected to the weight;

[0009] An anti-winding plate is installed at the bottom of the first mounting seat. The anti-winding plate is located between the flexible ruler and the vertical rod. The anti-winding plate has a certain width, and the swing center line of the flexible ruler is perpendicular to the anti-winding plate.

[0010] This pendulum teaching device uses a flexible ruler to replace the string used in traditional pendulum teaching devices to achieve the swing of a weight. Because the flexible ruler has a certain width, its surface is perpendicular to the plane of its swing direction, and a certain width anti-winding plate is installed between the flexible ruler and the vertical rod, this device effectively prevents the flexible ruler from wrapping around or colliding with the vertical rod of the bracket when the weight deflects during the swing process. Furthermore, the flexible ruler allows for the adjustment of the distance between the weight and the center of the swing at any time, and the length of the pendulum string can be visualized, facilitating the experiment.

[0011] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization:

[0012] In a specific embodiment, a mounting frame is fixedly provided at the front end of the first mounting seat, and a groove for the tape measure to be inserted into is provided on the inner side of the mounting frame.

[0013] In order to better fix the tape measure, a groove is opened on the inner side of the installation frame, and the box body of the tape measure is snapped into the groove to complete the position fixation.

[0014] In a specific embodiment, a plurality of positioning holes are provided on the flexible ruler along its length direction, and a positioning post is provided on the mounting frame to cooperate with the positioning holes. When the positioning post is inserted into one of the positioning holes, the extended length of the flexible ruler is fixed, that is, the length of the swing rope is fixed.

[0015] In a specific embodiment, the first mounting base is slidably mounted on the vertical rod, and a first adjustment bolt is provided on the first mounting base for positioning the first mounting base on the vertical rod. In this way, the height of the first mounting base can be easily adjusted, thereby adjusting the installation height of the tape measure.

[0016] In a specific embodiment, a second mounting seat is provided on the vertical rod and is located below the first mounting seat. A sensor for sensing the number of times the weight swings and a counter electrically connected to the sensor are installed on the second mounting seat to facilitate recording the number of times the weight swings during the experiment.

[0017] In a specific embodiment, the second mounting seat is slidably mounted on the vertical rod, and a second adjusting bolt for positioning the second mounting seat on the vertical rod is provided on the second mounting seat.

[0018] In a specific embodiment, slide rails are fixedly provided on both sides of the vertical rod, and the first mounting seat and the second mounting seat are slidably mounted on the vertical rod via the slide rails.

[0019] In a specific embodiment, the sensor is an infrared sensor. When the weight drives the flexible ruler to swing, the infrared sensor senses the swing of the flexible ruler or the weight, and the counter is connected to the sensor to count the swing of the weight.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1) The present invention uses a flexible ruler instead of a thin rope, and installs an anti-winding plate of a certain width between the flexible ruler and the vertical rod, thereby preventing the swing rope from winding around or colliding with the bracket due to the deflection of the heavy object during the experiment, thereby reducing the error of the experiment and improving the accuracy of the experiment.

[0022] 2) The utility model can adjust the distance between the weight and the swing center at any time by using a flexible ruler, and can accurately check the length of the swing rope at any time. An infrared sensor and a counter are set on the bracket to realize automatic counting of the number of swings, reducing the error and tediousness of manual counting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a structural diagram of a pendulum teaching device of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the first mounting seat of the utility model.

[0026] Figure 3 It is a partial enlarged structural schematic diagram of the first mounting seat of the utility model when viewed from above.

[0027] In the figure: 1-bracket; 11-support base; 12-vertical rod; 121-slide rail; 2-first mounting base; 21-mounting frame; 211-groove; 22-first adjustment bolt; 23-positioning column; 3-tape measure; 31-box body; 32-flexible ruler; 4-weight; 5-anti-winding plate; 6-second mounting base; 61-second adjustment bolt; 7-sensor; 8-counter. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] like Figure 1-Figure 3 As shown, one embodiment of the pendulum teaching device of the present invention comprises a bracket 1, comprising a support base 11 and a vertical rod 12 vertically mounted on the support base 11. A first mounting base 2 is slidably mounted on the vertical rod 12, and a measuring tape 3 is removably mounted on the first mounting base 2. The measuring tape 3 comprises a housing 31 and a flexible ruler 32 wound within the housing 31. One end of the flexible ruler 32 extends vertically downward as a pendulum string, with the ruler surface of the flexible ruler 32 perpendicular to the plane of the ruler's swing direction. A weight 4, serving as a pendulum, is fixedly connected to the distal end of the extended end of the flexible ruler 32.

[0032] To secure the first mounting base 2 to the vertical rod 12, a first adjustment bolt 22 is installed on the first mounting base 2, and the first adjustment bolt 22 is installed perpendicular to the vertical rod 12. The end of the first adjustment bolt 5 can extend from the first mounting base 2 and abut the vertical rod 12. When the first adjustment bolt 22 abuts the vertical rod 12, the relative position of the first mounting base 2 and the vertical rod 12 is fixed. When the first adjustment bolt 22 is released from the vertical rod 12, the first mounting base 2 can slide up and down along the vertical rod 12 to adjust the installation height of the tape measure 3.

[0033] To prevent the flexible ruler 32 from becoming entangled with the vertical rod 12 during its swing, an anti-wrap plate 5 is installed at the bottom of the first mounting base 2, and the anti-wrap plate 5 is located between the flexible ruler 32 and the vertical rod 12. The swing centerline of the flexible ruler 32 is perpendicular to the anti-wrap plate 5. The anti-wrap plate 5 also has a certain width. Therefore, the anti-wrap plate 5 can prevent the flexible ruler 32 from swinging toward the vertical rod 12, thereby preventing the flexible ruler 3 from becoming entangled with the vertical rod 12 or colliding with the vertical rod 12. In addition, the tape measure 3 of the present invention is a commercially available tape measure, and its flexible ruler 32 has a certain width. During the swinging of the weight 4 and the flexible ruler 32, it is not easy for the flexible ruler 32 to swing or become entangled with the vertical rod 12 due to deviation from the initial position.

[0034] When the installation height of the measuring tape 3 is fixed, the length of the swing rope can be adjusted directly by adjusting the length of the protruding end of the flexible ruler 32, and the length of the swing rope can be read directly through the scale on the flexible ruler 32, so the utility model is easy to use.

[0035] In order to better fix the tape measure 3, a mounting frame 21 is fixedly provided at the front end of the first mounting seat 2. A groove 211 is provided on the inner side of the mounting frame 21 for the tape measure 3 to be inserted into. The box body 31 of the tape measure 3 is inserted into the groove 211 to complete the position fixation.

[0036] To maintain a constant extended length of the flexible ruler 32, positioning holes 321 are provided along the length of the flexible ruler 32. Positioning posts 23 are provided on the mounting frame 21 to engage with the positioning holes 321. When the positioning posts 23 engage the positioning holes 321, the extended length of the flexible ruler 32 is fixed. In this embodiment, the positioning holes 321 are located directly on the centimeter line of the flexible ruler 32.

[0037] In order to facilitate the recording of the number of swings of the weight 4 during the experiment, a second mounting seat 6 is slidingly set on the vertical rod 12, and the second mounting seat 6 is installed below the first mounting seat 2; the second mounting seat 6 is provided with a sensor 7 and a counter 8, and the sensor 7 cooperates with the weight 4 to sense the number of swings of the weight 4, and the counter 8 is connected to the sensor 7 to calculate the number of swings of the weight 4.

[0038] To secure the second mounting base 6 to the vertical rod 12, a second adjustment bolt 61 is mounted on the second mounting base 6. The second adjustment bolt 61 is mounted perpendicular to the vertical rod 12, and the end of the second adjustment bolt 61 can extend from the second mounting base 6 and abut the vertical rod 12. When the second adjustment bolt 61 abuts the vertical rod 12, the relative position of the second mounting base 6 and the vertical rod 12 is fixed. When the second adjustment bolt 61 is released from the vertical rod 12, the second mounting base 6 can slide up and down along the vertical rod 12 to adjust the height of the sensor 7 and the counter 8.

[0039] The sensor 7 is an infrared sensor. When the weight 4 drives the flexible ruler 32 to swing, the infrared sensor 7 senses the number of swings of the flexible ruler 32 or the weight 4. The counter 8 is connected to the sensor 7 to calculate the number of swings of the weight 4.

[0040] In order to ensure that the first mounting seat 2 and the second mounting seat 6 do not rotate when adjusting the height, slide rails 121 are fixedly provided on both sides of the vertical rod 12, and the first mounting seat 2 and the second mounting seat 6 are both slidably engaged with the vertical rod 12 through the slide rails 121.

[0041] In practical applications, the pendulum teaching device of the present invention uses a flexible ruler 32 instead of the thin rope in the traditional solution as the pendulum rope. Since the flexible ruler 32 has a certain width, and the present invention sets an anti-winding plate 5 between the flexible ruler 32 and the vertical rod 12, it prevents the flexible ruler 32 from winding or colliding with the vertical rod 12 when the weight 4 deflects during the experiment. In addition, the present invention uses the flexible ruler 32 as the pendulum rope, and the distance between the weight 4 and the swing center can be adjusted at any time, and the length of the pendulum rope can be accurately checked at any time, which is convenient to use. In addition, the present invention uses the sensor 7 to sense and calculate the number of swings of the weight 4, avoiding the error and tediousness of manual counting, thereby reducing experimental errors and improving the accuracy of the experiment.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can, without departing from the scope of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification of the above embodiment made in accordance with the essence of the present invention without departing from the content of the present invention should fall within the scope of protection of the present invention.

Claims

1. A pendulum teaching device, comprising a bracket (1) and a weight (4) serving as a pendulum, wherein the bracket (1) comprises a support base (11) and a vertical rod (12), and is characterized in that: A first mounting seat (2) is provided on the vertical rod (12), a measuring tape (3) is mounted on the first mounting seat (2), the measuring tape (3) comprising a box body (31) and a flexible ruler (32) wound and mounted in the box body (31), one end of the flexible ruler (32) extending vertically downward as a swing rope, and a ruler surface of the flexible ruler (32) is perpendicular to a plane where the swing direction of the flexible ruler (32) is located, and the extending end of the flexible ruler (32) is connected to the weight (4); An anti-winding plate (5) is installed at the bottom of the first mounting seat (2), the anti-winding plate (5) is located between the flexible ruler (32) and the vertical rod (12), and the anti-winding plate (5) has a certain width, and the swing center line of the flexible ruler (32) is perpendicular to the anti-winding plate (5).

2. The pendulum teaching device according to claim 1, characterized in that: A mounting frame (21) is fixedly provided at the front end of the first mounting seat (2), and a groove (211) for the measuring tape (3) to be inserted is provided on the inner side of the mounting frame (21).

3. The pendulum teaching device according to claim 2, characterized in that: The flexible ruler (32) is provided with a plurality of positioning holes (321) along its length direction, and the mounting frame (21) is provided with positioning posts (23) that cooperate with the positioning holes (321). When the positioning posts (23) are engaged with one of the positioning holes (321), the extended length of the flexible ruler (32) is fixed.

4. The pendulum teaching device according to claim 1, characterized in that: The first mounting seat (2) is slidably mounted on the vertical rod (12), and a first adjustment bolt (22) for positioning the first mounting seat (2) on the vertical rod (12) is provided on the first mounting seat (2).

5. The pendulum teaching device according to claim 1, characterized in that: A second mounting seat (6) located below the first mounting seat (2) is provided on the vertical rod (12), and a sensor (7) for sensing the number of swings of the weight (4) and a counter (8) electrically connected to the sensor (7) are installed on the second mounting seat (6).

6. The pendulum teaching device according to claim 5, characterized in that: The second mounting seat (6) is slidably mounted on the vertical rod (12), and a second adjusting bolt (61) for positioning the second mounting seat (6) on the vertical rod (12) is provided on the second mounting seat (6).

7. The pendulum teaching device according to claim 5 or 6, characterized in that: Slide rails (121) are fixedly provided on both sides of the vertical rod (12), and the first mounting seat (2) and the second mounting seat (6) are slidably mounted on the vertical rod (12) via the slide rails (121).

8. The pendulum teaching device according to claim 5 or 6, characterized in that: The sensor (7) is an infrared sensor.

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