Simple harmonic motion demonstration instrument

Abstract

The utility model relates to a simple harmonic motion demonstration instrument. The simple harmonic motion demonstration instrument comprises a support mechanism, a first driver, a second driver, a bearing mechanism, a drawing mechanism and a bottom plate, the first driver is installed on the support mechanism, the second driver and the bearing mechanism are installed on the bottom plate, and the drawing mechanism is in sliding connection with the bearing mechanism and the support mechanism. The bearing seat circumferentially rotates at a constant speed in the horizontal plane, the first sliding assembly can synchronously do reciprocating motion close to or away from the support mechanism in the axial direction of the sliding rod, and the sliding rod can synchronously drive the second sliding block assembly to do reciprocating motion at a constant speed on the transverse rod in the axial direction of the transverse rod by means of reciprocating displacement parallel to the axial direction of the transverse rod. Based on the principle that uniform-speed circular motion can be decomposed into simple harmonic motion in the horizontal direction, the axial reciprocating motion of the drawing pen on the transverse rod in the axial direction of the transverse rod is matched with the uniform-speed motion of the paper in the height direction of the support mechanism, and the drawing pen can complete drawing of a simple harmonic motion displacement-time image on the paper.

Description

Technical Field

[0001] This application relates to the technical field of teaching instruments and equipment, and particularly to a simple harmonic motion demonstrator. Background Art

[0002] A simple harmonic motion demonstrator is a demonstration experimental device for drawing a displacement-time image of simple harmonic motion as shown in Figure 1 a physics course. Known simple harmonic motion demonstrators are basically of the spring oscillator type or the simple pendulum type. When in use, by connecting a paintbrush or a sand leakage device to the oscillator (such as a pendulum cone), while the oscillator (such as a pendulum cone) is moving, the paper below is pulled to move, so as to draw a displacement-time image of simple harmonic motion on the paper.

[0003] However, when the traditional simple harmonic motion demonstrator is in use, the friction force of the sliding rod on the reciprocating movement of the oscillator is difficult to ignore, resulting in the amplitude of the oscillator gradually decreasing until it stops during the movement process, and the drawn graph is not a standard displacement-time image of simple harmonic motion. In addition, the paper needs to be manually operated by pulling down forcefully by hand, which is not only time-consuming and laborious, but also difficult to ensure uniform motion, and it is impossible to use the same distance for each segment to represent the same time for each segment on the paper, resulting in the drawn image not being able to form a standard displacement-time image of simple harmonic motion. Summary of the Invention

[0004] An embodiment of this application provides a simple harmonic motion demonstrator, aiming to solve the problems of being unable to draw a standard displacement-time image of simple harmonic motion and inconvenient operation and use.

[0005] This application provides a simple harmonic motion demonstrator, which includes a bracket mechanism, a first driver, a second driver, a bearing mechanism, a drawing mechanism, and a bottom plate. The first driver is installed on the bracket mechanism, the second driver and the bearing mechanism are respectively installed on the bottom plate, and the drawing mechanism is slidably connected to the bearing mechanism and the bracket mechanism respectively, wherein:

[0006] The bracket mechanism includes a cross bar, and the cross bar is horizontally arranged in a direction parallel to the bottom plate;

[0007] The first driver is arranged on the bracket mechanism, and the first driver is used to drive the paper to move uniformly along the height direction of the bracket mechanism;

[0008] The second driver is arranged on one side of the bracket mechanism, and the second driver is used to output a rotational driving force parallel to the plane of the bottom plate;

[0009] The bearing mechanism includes a bearing seat and a first sliding component. The lower end of the bearing seat is drivingly connected to the second driver, and the upper end of the bearing seat is rotatably connected to the first sliding component; and

[0010] The drawing mechanism includes a sliding rod, a second sliding assembly and a drawing pen. The sliding rod is slidably connected to the first sliding assembly, so that the first sliding assembly reciprocates along the axial direction of the sliding rod toward or away from the bracket mechanism. The second sliding assembly is fixed to one end of the sliding rod close to the bracket mechanism, and the second sliding assembly is slidably connected to the cross bar. The drawing pen is set on the second sliding assembly and is used to cooperate with the paper for drawing.

[0011] When the simple harmonic motion demonstrator of the present invention is used for teaching or demonstrating the drawing of the displacement-time image of simple harmonic motion, the first driver is started, and the first driver can drive the paper to move autonomously at a uniform speed along the height direction of the bracket mechanism; after starting the first driver or at the same time as starting the first driver, the second driver is started, and the second driver can drive the supporting mechanism to autonomously make uniform circular rotation in the horizontal plane. On the one hand, the supporting seat makes uniform circular rotation in the horizontal plane, so that the first sliding component can synchronously make reciprocating motion along the axial direction of the slide rod (that is, the length direction of the slide rod) toward or away from the bracket mechanism. In this process, the slide rod is used to make reciprocating displacement parallel to the axial direction of the cross bar, so that the slide rod can synchronously drive the second slider component on the cross bar along the cross bar. The axial reciprocating uniform motion is based on the principle that uniform circular motion can be decomposed into simple harmonic motion in the horizontal direction (in this application, along the direction of the crossbar). The axial reciprocating motion of the paintbrush along the crossbar on the crossbar cooperates with the uniform motion of the paper along the height direction of the support mechanism, so that the paintbrush can complete the drawing of the simple harmonic motion displacement-time image on the paper. Since both the paper and the paintbrush are in strict uniform motion, and the support base is performing strict circular uniform rotation, the drawn simple harmonic motion displacement-time image is also standard. Moreover, under the conditions of the output power of the first and second drives, the various moving parts in the simple harmonic motion demonstrator can ensure motion accuracy, without the need for human intervention, with a high degree of automation, a good demonstration effect and a good user experience. In addition, the paintbrush and paper in this application are common consumables, easy to obtain, and low in purchase and use costs. Moreover, the simple harmonic motion demonstrator can be used normally in any type of place as long as there is sufficient light, so it is easy to use, has a wide range of applications, and is highly practical. Furthermore, the bracket mechanism, the first drive, the second drive, the bearing mechanism and the drawing mechanism can also be designed in a modular manner, and can be quickly and conveniently assembled on-site at the site of use, making installation and disassembly convenient and labor-saving.

[0012] The technical solution of this application is further described below:

[0013] In one embodiment, the bracket mechanism includes a bracket body, a mounting seat, a first paper roll and a second paper roll. The mounting seat is arranged in cooperation with the bracket body. The first driver is arranged on the bracket body. The first paper roll is connected to the rotating shaft of the first driver. The second paper roll is rotatably installed on the mounting seat. The first paper roll and the second paper roll are used for respectively winding and installing the two ends of the paper.

[0014] In one embodiment, there are two first drivers, and the two first drivers are horizontally spaced and arranged on the bracket body, and the two first drivers are respectively connected to the two axial ends of the first paper roll in one-to-one correspondence.

[0015] In one embodiment, the first driver includes a driving carrier plate, a motor, a first battery and a speed regulator. The motor, the first battery and the speed regulator are respectively installed on the driving carrier plate, and the motor and the first battery are respectively electrically connected to the speed regulator;

[0016] The speed regulating knob of the speed regulator extends to the outside of the driving carrier plate.

[0017] In one embodiment, the second driver includes a driving main body and a rotating carrier plate. The rotating carrier plate is arranged above the driving main body and is connected to the driving shaft of the driving main body. The driving main body is used for driving the rotating carrier plate to rotate uniformly in a circular motion on a horizontal plane.

[0018] In one embodiment, the bearing seat includes a bearing column and a bearing bracket. The bearing column is arranged on the rotating carrier plate and is offset from the rotation center of the rotating carrier plate. The bearing bracket is arranged at the top of the bearing column, and the bearing bracket includes a rotating column. The first sliding assembly includes a first sliding bracket and a first slider. The first sliding bracket is provided with a rotating hole, and the rotating column is rotatably inserted into the rotating hole. The first slider is arranged on the first sliding bracket. And, the first slider is provided with sliding holes facing the front and rear sides of the bracket mechanism, and the sliding rod passes through the sliding holes and is slidably sleeved on the first slider.

[0019] In one embodiment, rotatable rolling bodies are installed between the hole wall of the sliding hole of the first slider and the outer peripheral wall of the sliding rod.

[0020] In one embodiment, the second sliding assembly includes a second sliding bracket and a second slider. The second slider is arranged on the second sliding bracket through four stud bolts arranged in a rectangular array and is slidably sleeved on the cross bar. The four stud bolts extend to the lower part of the second sliding bracket, and the drawing pen is clamped in the extending parts of the four stud bolts.

[0021] In one embodiment, the second driver further includes a second battery, which is installed in the driving body and electrically connected to the driving body.

[0022] In one embodiment, the second driver further includes a remote controller, which is wirelessly communicatively connected to the driving body;

[0023] Alternatively, the second driver further includes control buttons, which are arranged on the driving body or the base plate, and the control buttons are wired communicatively connected to the driving body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the displacement-time image of simple harmonic motion.

[0027] Figure 2 It is a schematic structural diagram of the simple harmonic motion demonstrator according to an embodiment of this application.

[0028] Figure 3 It is Figure 2 the partial enlarged structural diagram at A in

[0029] Figure 4 It is Figure 2 the partial enlarged structural diagram at B in

[0030] Figure 5 It is a schematic structural diagram of the L2 segment for drawing the displacement-time image of simple harmonic motion when the bearing seat rotates to the S1 position.

[0031] Figure 6 It is Figure 5 the schematic structural diagram from the top view of

[0032] Figure 7 It is a schematic structural diagram of the L1 segment for drawing the displacement-time image of simple harmonic motion when the bearing seat rotates to the S2 position.

[0033] Figure 8 It is Figure 7Structural schematic diagram from a top-down perspective.

[0034] Explanation of reference numerals in the drawings:

[0035] 100, simple harmonic motion demonstrator; 10, support mechanism; 11, crossbar; 12, support body; 13, mounting seat; 14, first paper roll; 15, second paper roll; 20, first driver; 30, second driver; 31, driving body; 32, rotating carrier plate; 40, bearing mechanism; 41, bearing seat; 411, bearing column; 412, bearing bracket; 412a, rotating column; 42, first sliding assembly; 421, first sliding bracket; 421a, rotating hole; 422, first slider; 422a, sliding hole; 50, drawing mechanism; 51, sliding rod; 52, second sliding assembly; 521, second sliding bracket; 522, second slider; 523, stud; 53, pen; 60, paper; 70, bottom plate; 80, remote control. Detailed implementation manners

[0036] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application.

[0038] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0042] Referring to Figure 2 , Figures 5 to 8 , a simple harmonic motion demonstrator 100 shown in an embodiment of this application can be used in scenarios such as physics teaching, physics knowledge popularization, and experimental research, and assist people to automatically complete the drawing of the trigonometric function image, and this trigonometric function image is the displacement-time image of the simple harmonic motion as shown in Figure 1 shown.

[0043] Exemplarily, the simple harmonic motion demonstrator 100 includes a bracket mechanism 10, a first driver 20, a second driver 30, a bearing mechanism 40, a drawing mechanism 50, and a bottom plate 70. The first driver 20 is installed on the bracket mechanism 10, the second driver 30 and the bearing mechanism 40 are respectively installed on the bottom plate 70, and the drawing mechanism 50 is slidably connected to the bearing mechanism 40 and the bracket mechanism 10 respectively.

[0044] It should be noted that the bottom plate 70 in the present application can be a wooden board or a plastic board, and no specific limitation is imposed here. The bottom plate 70 is used to carry the bracket mechanism 10, the first driver 20, the second driver 30, the bearing mechanism 40 and the drawing mechanism 50. At this time, the bottom plate 70 is a component of the simple harmonic motion demonstrator 100. Alternatively, the bottom plate 70 can also refer to the ground of the working site where the simple harmonic motion demonstrator 100 is used.

[0045] The paper 60 is installed on the bracket mechanism 10, and the paper 60 is used to draw the displacement-time image of the simple harmonic motion. The bracket mechanism 10 includes a cross bar 11, and the cross bar 11 is horizontally arranged in a direction parallel to the bottom plate 70. It should be noted that referring to Figure 2 , Figure 5 and Figure 7 , the cross bar 11 extends in the X-axis direction, and the bottom plate 70 is placed on a horizontal tabletop or the ground. Therefore, the X-axis direction is the direction in which the cross bar 11 is parallel to the bottom plate 70.

[0046] The first driver 20 is arranged on the bracket mechanism 10, and the first driver 20 is used to drive the paper 60 to move uniformly along the height direction of the bracket mechanism 10. Referring to Figure 2 , Figure 5 and Figure 6 , the Z-axis direction indicated in the figure refers to the height direction of the bracket mechanism 10.

[0047] The second driver 30 is arranged on one side of the bracket mechanism 10. The second driver 30 is used to output a rotational driving force parallel to the plane of the bottom plate 70. As shown in Figure 2 , the plane of the bottom plate 70 is located in the XY plane. In other words, the second driver 30 is used to output a rotational driving force parallel to the XY plane. Moreover, since the plane of the bottom plate 70 can be regarded as a horizontal plane when the simple harmonic motion demonstrator 100 is placed on a tabletop or the ground, it can also be said that the second driver 30 is used to output a rotational driving force parallel to the horizontal plane.

[0048] Please continue to refer to Figure 2 and Figure 7 , the bearing mechanism 40 includes a bearing seat 41 and a first sliding component 42, and the lower end of the bearing seat 41 is drivingly connected to the second driver 30. Specifically, the second driver 30 can drive the bearing seat 41 to rotate uniformly around the center of the second driver 30 on a horizontal plane (i.e., the XY plane shown in Figure 2 ). The upper end of the bearing seat 41 is rotatably connected to the first sliding component 42. The drawing mechanism 50 includes a sliding rod 51, a second sliding component 52 and a pen 53. The sliding rod 51 is slidably connected to the first sliding component 42, so that the first sliding component 42 makes a reciprocating motion of approaching or departing from the bracket mechanism 10 along the axial direction of the sliding rod 51.

[0049] The second sliding component 52 is fixedly connected to one end of the sliding rod 51 close to the support mechanism 10, and the second sliding component 52 is slidably connected to the cross bar 11. That is to say, the second sliding component 52 can reciprocally slide along the axial direction of the cross bar 11. The so-called axial direction of the cross bar 11 is the length direction of the cross bar 11. The drawing pen 53 is arranged on the second sliding component 52 and is used for cooperating with the paper 60 for drawing.

[0050] In the embodiment of the present application, the drawing pen 53 can be regarded as a pendulum. Through the linkage relationship between the first sliding component 42 and the second sliding component 52, the simple harmonic motion demonstrator 100 simulates the drawing pen 53 as a pendulum. As the drawing pen 53 is driven by the second sliding component 52 to reciprocate along the axial direction of the cross bar 11, at the same time, the paper 60 will move uniformly upward or downward along the height direction of the support mechanism 10 due to the drive of the first driver 20. In this way, the drawing pen 53 can draw the waveform diagram of simple harmonic motion on the paper 60 that is continuously moving uniformly upward or downward along the height direction of the support mechanism 10 while reciprocating uniformly along the axial direction of the cross bar 11. Preferably, the first driver 20 drives the paper 60 to move upward along the height direction of the support mechanism 10. It should be noted that in the embodiment of the present application, the so-called upward movement refers to the direction towards the first driver 20, that is, the direction of the top of the first support 10. More specifically, when teaching or demonstrating the drawing of the displacement-time image of simple harmonic motion using the simple harmonic motion demonstrator 100 adopting this solution, the first driver 20 is started, and the first driver 20 can independently drive the paper 60 to move uniformly along the height direction of the support mechanism 10. In other words, the paper 60 can move uniformly along the up and down direction of the support mechanism 10 under the drive of the first driver 20. When the first driver 20 is started, the second driver 30 can be started at the same time, and the second driver 30 can independently drive the carrying mechanism 40 to perform uniform circular motion in the horizontal plane (i.e., in the XY plane).

[0051] It should be noted that in the embodiment of the present application, the second driver 30 can also be started immediately after the first driver 20 is started, and the specific situation is not limited here.

[0052] In this embodiment, specifically, the reason why the waveform of simple harmonic motion can be drawn on the paper 60 is that while the pen 53 makes a uniform reciprocating motion along the axial direction of the cross bar 11, the paper can move upward at a uniform speed along the height direction of the support mechanism 10. Imagine that if only the pen 53 makes a uniform reciprocating motion along the axial direction of the cross bar 11 and the paper remains stationary, then in this case, the pen 53 can only repeatedly draw a straight line at the same place on the paper. Only when the pen 53 makes a uniform reciprocating motion along the axial direction of the cross bar 11 and the paper can move upward at a uniform speed along the height direction of the support mechanism 10 corresponding to the speed of the uniform reciprocating motion of the pen 53 can a regular waveform of simple harmonic motion be drawn on the paper.

[0053] The pen 53 can make a uniform reciprocating motion along the axial direction of the cross bar 11 because the bearing mechanism 40 makes a uniform circular motion around the center of the second driver 30 on the horizontal plane, thereby driving the drawing mechanism 50 connected to the bearing mechanism 40 to make a uniform reciprocating motion along the horizontal direction of the paper. Specifically, the bearing seat 41 of the bearing mechanism 40 makes a uniform circular motion around the center of the second driver 30 on the horizontal plane, causing the first sliding assembly 42 of the bearing mechanism 40 to synchronously make a reciprocating motion of approaching or moving away from the support mechanism 10 along the axial direction of the slide bar 51. During this process, the bearing seat 41 drives the slide bar 51 to make a reciprocating displacement parallel to the axial direction of the cross bar 11 along the X-axis direction (that is, to make a uniform reciprocating motion along the horizontal direction of the paper), so that the slide bar 51 can synchronously drive the second slider assembly 52 to make a reciprocating uniform movement along the axial direction of the cross bar 11 (i.e., Figure 2 the X-axis in

[0054] Based on the principle that uniform circular motion can be decomposed into simple harmonic motion in the horizontal direction (in this application, along the crossbar 11), the reciprocating movement of the paintbrush 53 along the crossbar 11 along the X-axis (i.e., the axial direction of the crossbar 11) cooperates with the uniform motion of the paper 60 along the height direction of the support mechanism 10, enabling the paintbrush 53 to draw a simple harmonic motion displacement-time image on the paper 60. Because both the paper 60 and the paintbrush 53 perform strict uniform linear motion, while the support base 41 performs strict uniform circular rotation, the resulting simple harmonic motion displacement-time image is also standard. Furthermore, under the power output conditions of the first and second drivers 20 and 30, the moving components in the simple harmonic motion demonstrator 100 can maintain motion accuracy, eliminating the need for human intervention, resulting in a high degree of automation and a good demonstration effect and user experience. Furthermore, the paintbrush 53 and paper 60 in this application are both common consumables, making them easy to obtain and low in purchase and use costs. The simple harmonic motion demonstrator 100 can be used in any location with sufficient light, thus being easy to use, having a wide range of applications, and being highly practical. Furthermore, the bracket mechanism 10, first actuator 20, second actuator 30, supporting mechanism 40, and plotting mechanism 50 can be modularly designed, allowing for quick and convenient on-site assembly at the location of use, making installation and disassembly easy and labor-saving.

[0055] It should be noted that by controlling the rotational speed of the second driver 30, the rotational period of the support mechanism 40 can be changed, thereby achieving the purpose of changing the simple harmonic motion period. The change in the simple harmonic motion period can be reflected by the density of the waveform in the displacement-time graph drawn on the paper 60.

[0056] Furthermore, since the paper 60 is driven by the first driver 20 to move at a strictly uniform speed in the height direction of the support mechanism 10, the graphics drawn on the paper 60 change periodically within equal distances, which can be regarded as the image changing periodically within equal time lengths, thereby ensuring that the drawn image is a standard trigonometric function image, that is, a simple harmonic motion displacement-time image.

[0057] Optionally, the paper 60 can be white paper, or other types of paper, cloth, film, etc. The drawing pen 53 can be any one of a marker, a pencil, etc. These can be flexibly selected according to actual needs.

[0058] Please continue reading Figure 2 as well as Figure 5 and Figure 7, in an alternative embodiment, the bracket mechanism 10 includes a bracket body 12, a mounting base 13, a first paper roll 14 and a second paper roll 15. The mounting base 13 is cooperatively arranged with the bracket body 12. The first driver 20 is disposed on the bracket body 12. The first paper roll 14 is connected to the rotating shaft of the first driver 20. The second paper roll 15 is rotatably mounted on the mounting base 13. The first paper roll 14 and the second paper roll 15 are respectively used for winding and installing the two ends of the paper 60.

[0059] For example, the mounting base 13 is installed at the lower end of the bracket body 12, and the first driver 20 is installed at the upper end of the bracket body 12. Of course, the mounting base 13 and the first driver 20 can also be arranged at other positions of the bracket body 12, and specific details are not limited herein.

[0060] The bracket body 12 and the mounting base 13 are respectively used for installing and fixing the first paper roll 14 and the second paper roll 15, so that the paper 60 located between the first paper roll 14 and the second paper roll 15 is laid flat and kept in a taut state, so as to ensure that there is always a close contact between the paper 60 and the drawing pen 53 and guarantee the quality of the drawn image. It should be noted that the first paper roll 14 and the second paper roll 15 are respectively installed and fixed on the bracket body 12 and the mounting base 13, specifically referring to that the first paper roll 14 and the second paper roll 15 can be installed and positioned at the specified positions, and at the same time, the first paper roll 14 and the second paper roll 15 still have the freedom of rotation.

[0061] During use, the first driver 20 is started, and the first driver 20 drives the first paper roll 14 to rotate actively, so as to wind the paper 60. Correspondingly, the second paper roll 15 rotates passively driven by the paper 60 to unwind and expand the wound and stored paper 60, so as to ensure that there is always a new part of the paper 60 moving uniformly between the first paper roll 14 and the second paper roll 15, so that the drawing pen 53 can continuously draw a standard simple harmonic motion displacement-time image on the part of the paper 60 located between the first paper roll 14 and the second paper roll 15.

[0062] Please continue to refer to Figure 2 , based on the above embodiment, preferably, two first drivers 20 can be provided, and the two first drivers 20 are horizontally spaced and arranged at the upper end of the bracket body 12, or the two first drivers 20 can also be arranged at other height positions of the bracket body 12.

[0063] Preferably, the two first drivers 20 are arranged at the same height, and the two first drivers 20 are respectively connected to the axial ends of the first paper roll 14 in a one-to-one correspondence. After such an arrangement, the two ends of the first paper roll 14 are respectively connected and positioned by the two first drivers 20, so that the installation firmness and rotation smoothness of the first paper roll 14 are better, thereby better driving the paper 60 to move uniformly in the height direction.

[0064] It should be noted that, according to actual needs, the paper 60 can move uniformly in the direction from bottom to top or in the direction from top to bottom. Preferably, in this application, the paper 60 moves uniformly in the direction from bottom to top.

[0065] Specifically, in an optional embodiment, the first driver 20 includes a driving carrier board, a motor, a first battery and a speed regulator. The motor, the first battery and the speed regulator are respectively installed on the driving carrier board, and the motor and the first battery are respectively electrically connected to the speed regulator. Among them, the first battery can be used to supply power to the motor and the speed regulator, and the first battery is preferably a rechargeable battery. On the one hand, there is no need for the motor and the like to obtain power by connecting a power cord to a socket, which is convenient to use, not affected by the use environment, and convenient for the whole machine to move; on the other hand, the first battery can be conveniently charged to maintain the battery life and improve the usability of the simple harmonic motion demonstrator 100. The motor shaft of the motor is connected to the first paper roll 14, so as to drive the first paper roll 14 to rotate uniformly, so that the first paper roll 14 winds up the paper 60, achieving the effect of driving the paper 60 to move uniformly in the height direction of the bracket mechanism 10.

[0066] Or in other optional embodiments, the first battery can also be an alkaline battery (such as No. 5 battery, No. 7 battery, etc.) that can be replaced after the power is exhausted.

[0067] The speed regulating knob of the speed regulator extends to the outside of the driving carrier board. Thus, it is convenient for the user to operate the speed regulating knob to adjust the speed of the motor, thereby changing the moving speed of the paper 60 in the height direction (i.e., Figure 2 , Figure 5 and Figure 7 the Z-axis direction in

[0068] Please continue to refer to Figure 2, in yet another alternative embodiment, the second driver 30 includes a driving body 31 and a rotating carrier plate 32. The rotating carrier plate 32 is arranged above the driving body 31 and connected to the driving shaft of the driving body 31. The driving body 31 is used to drive the rotating carrier plate 32 to rotate uniformly in a plane parallel to the bottom plate 70, that is, to rotate uniformly in the horizontal plane (i.e., Figure 2 the XY plane shown). And the driving body 31 is fixedly connected to the bottom plate 70. Therefore, the rotating carrier plate 32 can rotate uniformly relative to the driving body 31 in the horizontal plane. Moreover, the carrier seat 41 of the carrying mechanism 40 is rotatably connected to the rotating carrier plate 32 (which will be elaborated later). Therefore, the uniform rotation of the rotating carrier plate 32 can drive the carrier seat 41 to rotate synchronously around the center of the rotating carrier plate 32 at a uniform speed.

[0069] It can be understood that the driving body 31 is a motor arranged in the height direction (i.e., Figure 2 , Figure 5 and Figure 7 the Z-axis direction in the figure). The electric shaft of the motor is arranged vertically upward. The rotating carrier plate 32 is coaxially installed on the electric shaft, and the installation method can be any one of screwing, shaft-hole insertion, clamping, etc. When the motor drives the electric shaft to rotate, the rotating carrier plate 32 can be synchronously driven to rotate uniformly in the horizontal plane, and then the carrying mechanism 40 installed on the rotating carrier plate 32 can be driven to rotate uniformly in a circular motion around the center of the rotating carrier plate 32.

[0070] Furthermore, the second driver 30 further includes a second battery. The second battery is installed in the driving body 31 and electrically connected to the driving body 31. The second battery is used to supply power to the motor, so that the motor does not need to be wired to a power socket, which is convenient for the movement and installation of the second driver 30.

[0071] Preferably, the second battery can be a rechargeable battery, which is convenient for charging to maintain the battery life and improve the performance of the second driver 30. Or in other alternative embodiments, the second battery can also be an alkaline battery (such as No. 5 battery, No. 7 battery, etc.) that can be replaced after the power is exhausted.

[0072] Even further, the second driver 30 can further include a remote controller 80. The remote controller 80 is wirelessly communicatively connected to the driving body 31. The user can hold the remote controller 80 to conveniently remotely control the rotation speed, start-stop state, etc. of the second driver 30 at different positions, improving the convenience and experience.

[0073] It should be noted that the remote controller 80 can be a separate remote control device, or it can refer to mobile terminal devices such as mobile phones and tablets carried by the user. An APP program is built into the mobile terminal device to achieve the purpose of remote control.

[0074] Alternatively, in another alternative embodiment, the second driver 30 further includes a control button, which is arranged on the driving body 31 or the bottom plate 70, and the control button is in wired communication connection with the driving body 31. The user can conveniently perform remote control on the rotation speed, start / stop state, etc. of the second driver 30 by operating the control button.

[0075] To facilitate understanding of the technical solution of the present application, please combine Figures 5 to 8 , it is set that the rotating carrier plate 32 is circular, and the bearing seat 41 is arranged at an eccentric position on the rotating carrier plate 32 near the edge of the rotating carrier plate 32. As an example, it is set that the rotating carrier plate 32 is driven by the driving force of the driving body 31 to rotate uniformly in the XY plane (i.e., the plane parallel to the plane of the bottom plate 70) in the counterclockwise direction, so that the rotating carrier plate 32 can drive the bearing seat 41 to perform uniform circular motion in the XY plane. It should be noted that the rotating carrier plate 32 can also rotate uniformly in the clockwise direction, and specific details are not limited here.

[0076] Combined with Figure 5 and Figure 6 As shown, the bearing seat 41 follows the rotating carrier plate 32 and is driven by the driving body 31 of the second driver 30 to perform uniform circular motion in the counterclockwise direction at a position near the edge of the rotating carrier plate 32. The bearing seat 41 follows the rotating carrier plate 32 and is rotated to Figure 6 The position shown is set as S1. At this time, the bearing seat 41 is on the diameter D of the rotating carrier plate 32 and is close to one end of the diameter D. It should be noted that the diameter D is specifically a diameter parallel to the X axis.

[0077] At the same time, the bearing column 411 itself also performs uniform self-rotation to cooperate with the movement of the first sliding assembly 42 approaching or departing from the bracket mechanism 10, which will be described in detail later.

[0078] As the rotating carrier plate 32 continues to rotate, the bearing seat 41 will also rotate synchronously. Combined with Figure 7 and Figure 8 As shown, the bearing seat 41 is rotated to Figure 8 The position shown is set as S2. At this time, the bearing seat 41 is on the diameter D of the rotating carrier plate 32 and is close to the other end of the diameter D.

[0079] Combined with Figure 1 and Figure 7 As shown, along with the paper 60 moving upward uniformly in the height direction of the bracket mechanism 10 (i.e., the Z-axis direction), during the process of the rotating carrier plate 32 driving the bearing seat 41 to rotate from the S1 position to the S2 position, the pen 53 draws the L1 segment of the displacement-time image of the simple harmonic motion. Combined with Figure 1 and Figure 5As shown, when the rotating carrier plate 32 drives the bearing seat 41 to rotate back from the S2 position to the S1 position, the pen 53 draws the L2 segment of the displacement-time image of the simple harmonic motion. Therefore, as the rotating carrier plate 32 drives the bearing seat 41 to rotate uniformly in a circular motion around the center of the rotating carrier plate 32 in a horizontal plane (i.e., the Figure 2 XY plane shown) in a cycle, and at the same time the paper 60 continuously moves uniformly along the Z axis, the pen 53 can draw the entire displacement-time image of the simple harmonic motion on the paper 60.

[0080] As described above, the bearing seat 41 is rotatably connected to the first sliding assembly 42, and the first sliding assembly 42 is slidably connected to the drawing mechanism 50. Specifically, as Figure 4 shown, the bearing seat 41 includes a bearing column 411 and a bearing bracket 412. The bearing column 411 is disposed on the rotating carrier plate 32 and is offset from the rotation center of the rotating carrier plate 32. The bearing bracket 412 is disposed at the top of the bearing column 411, and the bearing bracket 412 includes a rotating column 412a. The first sliding assembly 42 includes a first sliding bracket 421 and a first slider 422. The first sliding bracket 421 is provided with a rotating hole 421a, and the rotating column 412a is rotatably inserted into the rotating hole 421a. The first slider 422 is disposed on the first sliding bracket 421. Moreover, sliding holes 422a are formed through the front and rear sides of the first slider 422 facing the bracket mechanism 10, and the slide rod 51 passes through the sliding holes 422a and is slidably sleeved on the first slider 422, so that the first slider 422 can slide relative to the slide rod 51.

[0081] The bearing column 411 can be made of a columnar log, which is convenient to obtain and has a low usage cost. The bearing column 411 can be directly placed on the surface of the rotating carrier plate 32 and fixed by means of gravity, or can be fixed on the rotating carrier plate 32 by means of bonding, clamping, screwing, etc., to prevent tipping due to unstable center of gravity during rotation.

[0082] Referring to Figures 5 to 8, the load-bearing column 411 is arranged at an eccentric position on the rotating carrier plate 32 near the edge of the rotating carrier plate 32. When the rotating carrier plate 32 rotates, it can drive the load-bearing column 411 to rotate uniformly in the circumferential direction around the center of the rotating carrier plate 32. Since the load-bearing bracket 412 is rotatably connected to the first sliding assembly 42 by inserting the rotating column 412a into the rotating hole 421a, as the load-bearing column 411 rotates circumferentially around the center of the rotating carrier plate 32, at the same time, the rotating column 412a will also rotate synchronously in the rotating hole 421a. Then the rotating column 412 drives the load-bearing bracket 412, and the load-bearing bracket 412 drives the load-bearing column 411 to rotate self. Moreover, since the load-bearing seat 41 moves uniformly in a circular motion around the center of the rotating carrier plate 32 along the edge of the rotating carrier plate 32, at the same time, the rotating column 412a drives the first slider 422 to move back and forth along the sliding rod 51 close to or away from the bracket mechanism 10 by means of the abutting action between the rotating column 412a and the hole wall of the rotating hole 421a.

[0083] It should be noted that the sliding rod 51 of the drawing mechanism 50 is inserted into the sliding hole 422a of the first sliding assembly 42. The sliding hole 422a facing the bracket mechanism 10 limits the movement direction of the sliding rod 51, so that the sliding rod 51 can only move back and forth relative to the bracket mechanism 10 close to or away from the bracket mechanism 10. And because the load-bearing column 411 is arranged at an eccentric position on the rotating carrier plate 32, the first slider 422 also drives the sliding rod 51 to move uniformly back and forth in the X-axis direction (i.e., along the axial direction of the cross bar 11), so as to pull and push the second sliding assembly 52 to slide back and forth linearly on the cross bar 11 through the sliding rod 51, so that the pen 53 can draw a simple harmonic motion displacement-time image on the paper 60. The structure of the first sliding assembly 42 in this embodiment is simple, the components are easy to obtain, the purchase and use costs are low, and the structure strength of the first sliding assembly 42 is high, the durability is good, and it is not easy to be damaged.

[0084] It should be noted that the function of the first sliding bracket 421 is reflected in: on the one hand, it can ensure that the first slider 422 will not tilt excessively when receiving the reaction force of the sliding rod 51, and ensure that the first slider 422 moves on the horizontal plane; on the other hand, since the load-bearing column 411 is installed and fixed on the rotating carrier plate 32 by means of bonding, clamping, screwing, etc., while making a uniform circular motion around the center of the rotating carrier plate 32, the load-bearing bracket 412 itself is also rotating. The rotating column 412a is rotatably inserted into the rotating hole 421a, which can prevent the first slider 422 from rotating with the load-bearing bracket 412.

[0085] Preferably, rotatable rolling elements are installed between the inner wall of the sliding hole 422a of the first slider 422 and the outer peripheral wall of the sliding rod 51. The provided rolling elements can convert the sliding friction between the first slider 422 and the sliding rod 51 into rolling friction, thereby reducing the frictional resistance of the relative movement between the two, making the relative movement between the first slider 422 and the sliding rod 51 smoother, and reducing the resistance suffered by the second driver 30 during rotation.

[0086] For example, the rolling elements can be selected as ball bearings. A plurality of ball bearings are provided. Raceways are provided on the inner wall of the sliding hole 422a of the first slider 422 and the outer peripheral wall of the sliding rod 51, and the ball bearings are arranged in the raceways. It is also possible to provide a raceway only on the inner wall of the sliding hole 422a of the first slider 422, or to provide a raceway only on the outer peripheral wall of the sliding rod 51. Specifically, it is not limited here.

[0087] As Figure 3 shown, in an optional embodiment, the second sliding assembly 52 includes a second sliding bracket 521 and a second slider 522. The second slider 522 is arranged on the second sliding bracket 521 through four stud bolts 523 arranged in a rectangular pattern and is slidably sleeved on the cross bar 11. The four stud bolts 523 extend below the second sliding bracket 521, and the drawing pen 53 is clamped in the extended parts of the four stud bolts 523.

[0088] Specifically, the second sliding bracket 521 includes two saddle clamps, a plastic plate, four stud bolts 523, etc. The two saddle clamps are fixed to the upper surface of the plastic plate by screws and are clamped and fixed to the sliding rod 51 through the saddle clamps. The second slider 522 is locked to the lower surface of the plastic plate through four stud bolts 523, and the ends of the four stud bolts 523 all pass through the lower surface of the second slider 522. The screw rod part of each stud bolt 523 extending out of the lower surface of the second slider 522 is set as a clamping part. The four clamping parts are distributed in a rectangular pattern, and a clamping groove is formed in the middle of the four clamping parts. The width of the clamping groove is basically equal to the diameter of the drawing pen 53, so that the drawing pen 53 can be directly and firmly clamped in the clamping groove. The installation method is simple, and it can prevent the drawing pen 53 from shifting and loosening when the tip of the drawing pen 53 touches the paper 60, affecting the quality of the drawn simple harmonic motion-time image. The second sliding assembly 52 in this embodiment has a simple structural composition, the components are easy to obtain, the purchase and use costs are low, and the second sliding assembly 52 has high structural strength, good durability and is not easily damaged.

[0089] In the embodiment of the present application, the above structural design of the first slider assembly 42 enables the bearing column 411 to rotate synchronously around its own axis while following the rotating carrier plate 32 to perform uniform circular motion around the center of the rotating carrier plate 32. As a result, the first slider assembly 42 can only perform reciprocating motion back and forth on the sliding rod 51 close to or away from the bracket mechanism 10. Moreover, since the pen 53 of the drawing mechanism 50 is fixedly connected to the second sliding assembly 52, and the second sliding assembly 52 is slidably connected to the cross bar 11 of the bracket mechanism 10 along the length direction of the cross bar 11, as the bearing column 411 performs uniform circular motion around the center of the rotating carrier plate 32, the sliding rod 51 can drive the pen 53 to reciprocate along the length direction of the cross bar 11. Additionally, due to the uniform upward or downward movement of the paper, a regular waveform diagram of simple harmonic motion is drawn. The structural design of the simple harmonic motion demonstrator 100 in the embodiment of the present application is ingenious. Through the connection structure of the bracket mechanism 10, the first sliding assembly 42, the second sliding assembly 52, and the bearing mechanism 40, the interlocking relationship between the mechanisms is perfectly and smoothly achieved, and a regular waveform diagram is drawn.

[0090] The structure and principle of the simple harmonic motion demonstrator provided by the present application have been described in detail above. The following is a description of a method for using the simple harmonic motion demonstrator 100 as described above, which includes the following steps:

[0091] S10: Connect the paper 60 to the first driver 20 and the bracket mechanism 10 respectively, and connect the bearing mechanism 40 to the second driver 30 and the drawing mechanism 50 respectively.

[0092] S20: Start the first driver 20 to drive the paper 60 to move uniformly in a straight line along the height direction of the bracket mechanism 10. Then or simultaneously, start the second driver 30. The second driver 30 drives the bearing mechanism 40 to perform uniform circular motion in the horizontal plane. By means of the reciprocating displacement of the sliding rod 51 parallel to the axial direction of the cross bar 11 along the X-axis direction, the second sliding assembly 52 is driven to move back and forth uniformly along the X-axis on the cross bar 11, and further drives the pen 53 to complete the drawing of the displacement-time image of simple harmonic motion on the paper 60.

[0093] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0094] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A simple harmonic motion demonstrator, characterized in that, It includes a bracket mechanism, a first driver, a second driver, a bearing mechanism, a drawing mechanism and a bottom plate. The first driver is installed on the bracket mechanism. The second driver and the bearing mechanism are respectively installed on the bottom plate. The drawing mechanism is slidably connected to the bearing mechanism and the bracket mechanism respectively. Wherein: The bracket mechanism includes a cross bar which is horizontally arranged along a direction parallel to the bottom plate; The first driver is arranged on the bracket mechanism and is used for driving the paper to move uniformly along the height direction of the bracket mechanism; The second driver is arranged on one side of the bracket mechanism and is used for outputting a rotational driving force parallel to the plane of the bottom plate; The bearing mechanism includes a bearing seat and a first sliding component. The lower end of the bearing seat is drivingly connected to the second driver, and the upper end of the bearing seat is rotatably connected to the first sliding component; and The drawing mechanism includes a sliding rod, a second sliding component and a pen. The sliding rod is slidably connected to the first sliding component, so that the first sliding component moves reciprocally close to or away from the bracket mechanism along the axial direction of the sliding rod. The second sliding component is fixedly connected to one end of the sliding rod close to the bracket mechanism, and the second sliding component is slidably connected to the cross bar. The pen is arranged on the second sliding component and is used for cooperating with the paper for drawing.

2. The simple harmonic motion demonstrator according to claim 1, characterized in that, The bracket mechanism includes a bracket body, a mounting seat, a first paper roll and a second paper roll. The mounting seat is arranged in cooperation with the bracket body. The first driver is arranged on the bracket body. The first paper roll is connected to the rotating shaft of the first driver. The second paper roll is rotatably installed on the mounting seat. The first paper roll and the second paper roll are used for respectively winding and installing the two ends of the paper.

3. The simple harmonic motion demonstrator according to claim 2, characterized in that, There are two first drivers which are horizontally arranged at intervals on the bracket body, and the two first drivers are respectively connected to the two axial ends of the first paper roll in one-to-one correspondence.

4. The simple harmonic motion demonstrator according to any one of claims 1 to 3, characterized in that, The first driver includes a driving carrier plate, a motor, a first battery and a speed regulator. The motor, the first battery and the speed regulator are respectively installed on the driving carrier plate, and the motor and the first battery are respectively electrically connected to the speed regulator; The speed regulating knob of the speed regulator extends to the outside of the driving carrier plate.

5. The simple harmonic motion demonstrator according to any one of claims 1 to 3, characterized in that, The second driver includes a driving main body and a rotating carrier plate. The rotating carrier plate is arranged above the driving main body and is connected to the driving shaft of the driving main body. The driving main body is used for driving the rotating carrier plate to rotate uniformly in a horizontal plane.

6. The simple harmonic motion demonstrator according to claim 5, characterized in that, The bearing seat includes a bearing column and a bearing bracket. The bearing column is disposed on the rotating carrier plate and is offset from the rotation center of the rotating carrier plate. The bearing bracket is disposed at the top of the bearing column, and the bearing bracket includes a rotating column. The first sliding assembly includes a first sliding bracket and a first slider. The first sliding bracket is provided with a rotating hole, and the rotating column is rotatably inserted into the rotating hole. The first slider is disposed on the first sliding bracket. Moreover, sliding holes are formed in the front and rear sides of the first slider facing the bracket mechanism, and the sliding rod passes through the sliding holes and is slidably sleeved on the first slider.

7. The simple harmonic motion demonstrator according to claim 6, characterized in that, A rotatable rolling body is installed between the hole wall of the sliding hole of the first slider and the outer peripheral wall of the sliding rod.

8. The simple harmonic motion demonstrator according to any one of claims 1 to 3, characterized in that, The second sliding assembly includes a second sliding bracket and a second slider. The second slider is disposed on the second sliding bracket through four stud bolts arranged in a rectangular pattern and is slidably sleeved on the cross bar. The four stud bolts extend below the second sliding bracket, and the drawing pen is clamped in the extending portions of the four stud bolts.

9. The simple harmonic motion demonstrator according to claim 5, characterized in that, The second driver further includes a second battery. The second battery is installed in the driving body and is electrically connected to the driving body.

10. The simple harmonic motion demonstrator according to claim 5, characterized in that, The second driver further includes a remote controller. The remote controller is wirelessly communicatively connected to the driving body; Alternatively, the second driver further includes control buttons. The control buttons are disposed on the driving body or the bottom plate, and the control buttons are wired communicatively connected to the driving body.

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