Simple harmonic vibration demonstrator

Abstract

The utility model discloses a simple harmonic vibration demonstrator, and belongs to the field of teaching experiment instruments. The demonstrator comprises a vibration generation mechanism and an image drawing mechanism, the vibration generation mechanism comprises a demonstration piece capable of doing uniform circular motion in a plane, the demonstration piece is movably connected with a guide piece, and the demonstration piece drives the guide piece to do linear reciprocating motion while doing uniform circular motion; the image drawing mechanism comprises a paper feeding mechanism and a drawing piece, paper moving at a constant speed is arranged on the paper feeding mechanism, and the drawing piece is located above the paper, connected with the guiding piece and capable of leaving marks on the paper along with movement of the guiding piece. According to the utility model, the circular motion of the demonstration piece is converted into the linear simple harmonic motion of the guide piece, and the circular motion can be stably generated through the driving mechanism, so that the guide piece stably does the simple harmonic motion. The overall structure is compact, and additional installation is not needed during testing.

Description

Technical Field

[0001] The utility model relates to teaching experiment instruments, in particular to a simple harmonic vibration demonstrator. Background Art

[0002] Simple harmonic vibration is an important content of physics courses. In order to understand the variation characteristics of force, acceleration and velocity during the simple harmonic motion process and deeply study the motion law of simple harmonic vibration, experiments are generally combined in teaching to analyze the motion law of the mass point by using images.

[0003] Common experimental demonstrators generally connect a mass point with a spring to make the mass point do simple harmonic vibration. However, this structure has many defects. On the one hand, due to factors such as friction and spring performance, it cannot stably reproduce simple harmonic vibration. On the other hand, the spring structure generally cooperates with gravity to generate simple harmonic vibration. Therefore, the experiment can only be carried out in the vertical plane. At this time, the spring structure needs to be installed additionally and placed perpendicular to other devices on the desktop. The structure is relatively complex, and accessories need to be installed every time an experiment is carried out, which is rather inconvenient. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a simple harmonic vibration demonstrator with a simple structure, simple operation and capable of stably generating simple harmonic vibration.

[0005] The technical solution of the utility model is as follows:

[0006] A simple harmonic vibration demonstrator includes a vibration generating mechanism and an image drawing mechanism.

[0007] The vibration generating mechanism includes a demonstration part capable of doing uniform circular motion in a plane. The demonstration part is movably connected with a guiding part. While the demonstration part is doing uniform circular motion, it drives the guiding part to do linear reciprocating motion.

[0008] The image drawing mechanism includes a paper feeding mechanism and a drawing part. There is a paper moving at a uniform speed on the paper feeding mechanism, and the moving direction of the paper is perpendicular to the moving direction of the guiding part. The drawing part is located above the paper and is connected with the guiding part and can leave a mark on the paper along with the movement of the guiding part.

[0009] Preferably, the vibration generating mechanism includes a first driving mechanism and a rocker. The output end of the first driving mechanism is connected with one end of the rocker and can drive the rocker to rotate in a plane. The demonstration part is arranged at the other end of the rocker.

[0010] Preferably, the demonstration part is spherical.

[0011] Preferably, it further includes a demonstration table, and both the vibration generating mechanism and the image drawing mechanism are arranged on the demonstration table; a linear guide rail is further arranged on the demonstration table, and the guiding member is slidably connected to the linear guide rail.

[0012] Preferably, the guiding member includes a connecting portion perpendicular to the linear guide rail. An activity slot is formed through the connecting portion up and down, and the activity slot extends along the direction of the connecting portion. The demonstration member is clamped in the activity slot and moves within the activity slot.

[0013] Preferably, the drawing member is a drawing pen, and the drawing pen draws a graph on the paper along with the movement of the guiding member.

[0014] Preferably, the paper feeding mechanism includes a writing roller, a paper feeding roller, and a second driving mechanism. The writing roller and the paper feeding roller are parallel to each other. The output end of the second driving mechanism is connected to the paper feeding roller and drives the paper feeding roller to rotate at a constant speed, so that the paper passes through between the writing roller and the paper feeding roller at a constant speed.

[0015] Preferably, the paper feeding mechanism further includes a tearing portion located above the paper feeding roller, and the tearing portion is serrated.

[0016] Preferably, a supporting member is arranged at the bottom of the demonstration table.

[0017] Preferably, it further includes a central control system. The central control system includes operation buttons arranged on the demonstration table. The operation buttons are electrically connected to the first and second driving mechanisms respectively and can control the output of the first and second driving mechanisms.

[0018] The beneficial technical effects of the present utility model are as follows:

[0019] 1. Convert the circular motion of the demonstration member into the linear simple harmonic motion of the guiding member. Since the circular motion can be stably generated by the driving mechanism, the guiding member can stably perform simple harmonic motion.

[0020] 2. Since it is not affected by gravity, the present utility model can be placed horizontally or vertically, which is convenient for operation and observation.

[0021] 3. The vibration generating mechanism and the image drawing mechanism are integrally arranged on the tabletop of the demonstration table, with a compact structure and no need for additional installation during the test. Description of the Drawings

[0022] Figure 1 is the overall structural schematic diagram of the present utility model;

[0023] Figure 2 is the structural schematic diagram of the vibration generating mechanism;

[0024] Figure 3It is a schematic diagram of the structure of the image drawing mechanism;

[0025] Figure 4 yes Figure 3 Enlarged view of part I;

[0026] in:

[0027] 100. vibration generating mechanism; 200. image drawing mechanism; 300. demonstration platform;

[0028] 101. Demonstration piece; 102. First driving mechanism; 103. Rocker; 104. Linear guide rail; 105. Guide piece;

[0029] 1051, connecting portion; 1052, movable groove;

[0030] 201, paper feeding mechanism; 202, drawing piece;

[0031] 2011, writing roller; 2012, paper feeding roller; 2013, second driving mechanism; 2014, groove; 2015, pen holder; 2016, tearing part;

[0032] 301. Operation button; 302. Switch button; 303. Support member. DETAILED DESCRIPTION

[0033] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0034] Figures 1 to 4 This embodiment provides a simple harmonic vibration demonstrator, including a demonstration platform 300, on which a vibration generating mechanism 100 and an image drawing mechanism 200 are arranged. The vibration generating mechanism 100 is used to generate stable simple harmonic vibration, including a demonstration piece 101 that can make uniform circular motion on the surface of the demonstration platform 300, and a first driving mechanism 102 is arranged inside the demonstration platform 300. The first driving mechanism 102 provides power for the movement of the demonstration piece 101, and its form is various, for example, it can be a motor. The output end of the first driving mechanism 102 is connected to one end of a rocker 103 and can drive the rocker 103 to rotate in a plane, and the demonstration piece 101 is arranged at the other end of the rocker 103. When the rocker 103 makes a rotational motion on the table, the demonstration piece 101 makes a circular motion accordingly.

[0035] The demonstration platform 300 is also provided with a linear guide rail 104 and a guide member 105 capable of making reciprocating linear motion along the linear guide rail 104. For the convenience of experiments and observations, in a preferred embodiment, the direction of the linear guide rail 104 is perpendicular to one side of the demonstration platform 300. The guide member 105 includes a connecting portion 1051 which is perpendicular to the linear guide rail 104. The connecting portion 1051 is provided with an activity slot 1052 penetrating up and down, and the activity slot 1052 extends along the direction of the connecting portion 1051. The demonstration member 101 is clamped in the activity slot 1052 and moves within the activity slot 1052. The shape of the demonstration member 101 is not limited. In order to enable it to move better within the activity slot 1052, in a preferred embodiment, the demonstration member 101 can be made spherical. The bottom of the sphere is connected to the rocker 103 through a connecting member. The size of the connecting member is smaller than the width of the activity slot 1052, while the size of the spherical demonstration member 101 is larger than the width of the activity slot 1052, so that the demonstration member 101 is clamped in the activity slot 1052 and moves within the activity slot 1052.

[0036] When the demonstration member 101 makes a uniform circular motion under the drive of the first drive mechanism 102, it simultaneously makes a reciprocating motion within the activity slot 1052, thereby driving the entire guide member 105 to make a reciprocating linear motion along the linear guide rail 104. According to relevant mathematical theories, the reciprocating linear motion of the guide member 105 along the linear guide rail 104 is actually a simple harmonic motion. Since the uniform circular motion of the demonstration member 101 under the drive of the first drive mechanism 102 is stable, the simple harmonic motion of the guide member 105 along the linear guide rail 104 is also stable and can be realized in any plane including the vertical plane.

[0037] The image drawing mechanism 200 includes a paper feeding mechanism 201 and a drawing member 202. The paper feeding mechanism 201 includes a writing roller 2011, a paper feeding roller 2012, and a second drive mechanism 2013. The writing roller 2011 and the paper feeding roller 2012 are parallel to each other and parallel to the linear guide rail 104. The output end of the second drive mechanism 2013 is connected to the paper feeding roller 2012 and drives the paper feeding roller 2012 to rotate uniformly, so that the paper passes through between the writing roller 2011 and the paper feeding roller 2012 at a uniform speed, and the paper movement direction is perpendicular to the linear guide rail 104. The paper feeding roller 2012 includes an upper rotating roller and a lower rotating roller arranged closely up and down. The paper passes through between the upper and lower rotating rollers. When the upper and lower rotating rollers rotate, the paper can be driven to move under the action of friction.

[0038] A groove 2014 is provided below the paper feeding mechanism 201 on the tabletop. Paper materials, such as a cylindrical roll paper tube, are placed in the groove 2014, and the paper of the roll paper tube passes through the writing roller 2011 and the paper feeding roller 2012 in sequence.

[0039] The drawing member 202 is located above the paper and is connected to the guiding member 105 and can leave an imprint on the paper as the guiding member 105 moves. There are various forms of the drawing member 202. For example, in one embodiment, an electromagnetic dotting timer can be selected. The electromagnetic dotting timer is electrically connected to a discharge needle and controls the discharge needle to punch a series of ink dots on the paper at a uniform time interval.

[0040] In another embodiment, the drawing member 202 is a drawing pen, and the drawing pen draws a graph on the paper as the guiding member 105 moves. In this embodiment, the drawing pen is movably connected to the guiding member 105 to facilitate adjusting the position of the drawing pen so that it can just contact the paper. A pen holder 2015 is also provided on the demonstration table 300 for placing the drawing pen.

[0041] Above the upper rotating roller, there is a tearing portion 2016, which is arranged downward and is serrated. In the experiment, when the paper is pulled along the tearing portion 2016, the paper can be torn off, which is relatively convenient.

[0042] In another embodiment, the present utility model further includes a central control system. The central control system includes a control button 301 provided on the demonstration table 300. The control button 301 is electrically connected to the first and second driving mechanisms respectively and can control the output force of the first and second driving mechanisms, thereby regulating the rotation speed of the demonstration member 101 and the moving speed of the paper.

[0043] In one embodiment, the present utility model further includes a plug, which is connected to an external power supply to provide a power source for the first and second driving mechanisms. A switch button 302 is also provided on the demonstration table 300 for turning on and off the power supply.

[0044] Since the present utility model is not affected by gravity, when the students are doing experiments, the demonstration table 300 can be placed parallel to the ground. When it is necessary to display and give lectures, the demonstration table 300 can be placed vertically on the ground. At this time, the bottom of the demonstration table 300 contacts the ground, and two supporting members 303 are provided on the bottom. Preferably, the supporting members 303 can be made of plastic materials to facilitate anti-collision and wear resistance.

[0045] The working principle of this utility model is as follows: Connect the power supply, control the first driving mechanism 102 to drive the rocker 103 to make a rotational motion, and then drive the demonstration member 101 to make a uniform circular motion. The demonstration member 101 moves in the movable groove 1052 at the same time, and then drives the guiding member 105 to make a reciprocating simple harmonic motion along the linear guide rail 104. The drawing member 202 leaves an imprint on the uniformly moving paper at the same time.

[0046] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A simple harmonic vibration demonstrator, characterized in that: It includes a vibration generating mechanism (100) and an image drawing mechanism (200). The vibration generating mechanism (100) includes a demonstration part (101) that can perform uniform circular motion in a plane. The demonstration part (101) is movably connected to a guiding part (105). While the demonstration part (101) performs uniform circular motion, it drives the guiding part (105) to perform linear reciprocating motion. The image drawing mechanism (200) includes a paper feeding mechanism (201) and a drawing part (202). The paper feeding mechanism (201) is provided with a paper that moves uniformly, and the moving direction of the paper is perpendicular to the moving direction of the guiding part (105). The drawing part (202) is located above the paper and is connected to the guiding part (105) and can leave marks on the paper along with the movement of the guiding part (105).

2. The simple harmonic vibration demonstrator according to claim 1, characterized in that: The vibration generating mechanism (100) includes a first driving mechanism (102) and a rocker (103). The output end of the first driving mechanism (102) is connected to one end of the rocker (103) and can drive the rocker (103) to rotate in a plane. The demonstration part (101) is arranged at the other end of the rocker (103).

3. The simple harmonic vibration demonstrator according to claim 1, characterized in that: The demonstration part (101) is spherical.

4. The simple harmonic vibration demonstrator according to claim 1, characterized in that: It further includes a demonstration table (300). The vibration generating mechanism (100) and the image drawing mechanism (200) are both arranged on the demonstration table (300). A linear guide rail (104) is also arranged on the demonstration table (300). The guiding part (105) is slidably connected to the linear guide rail (104).

5. The simple harmonic vibration demonstrator according to claim 4, characterized in that: The guiding part (105) includes a connecting part (1051). The connecting part (1051) is perpendicular to the linear guide rail (104). The connecting part (1051) is provided with an activity groove (1052) that penetrates up and down. The activity groove (1052) extends along the direction of the connecting part (1051). The demonstration part (101) is clamped in the activity groove (1052) and moves in the activity groove (1052).

6. The simple harmonic vibration demonstrator according to claim 1, characterized in that: The drawing part (202) is a drawing pen. The drawing pen draws a graph on the paper along with the movement of the guiding part (105).

7. The simple harmonic vibration demonstrator according to claim 2, characterized in that: The paper feeding mechanism (201) includes a writing roller (2011), a paper feeding roller (2012), and a second driving mechanism (2013). The writing roller (2011) and the paper feeding roller (2012) are parallel to each other. The output end of the second driving mechanism (2013) is connected to the paper feeding roller (2012) and drives the paper feeding roller (2012) to rotate uniformly, so that the paper passes through between the writing roller (2011) and the paper feeding roller (2012) uniformly.

8. The simple harmonic vibration demonstrator according to claim 7, wherein: The paper feeding mechanism (201) further includes a tearing part (2015). The tearing part (2015) is located above the paper feeding roller (2012). The tearing part (2015) is serrated.

9. The simple harmonic vibration demonstrator according to claim 4, characterized in that: Supporting parts (303) are arranged at the bottom of the demonstration table (300).

10. The simple harmonic vibration demonstrator according to claim 7, characterized in that: It further includes a central control system, and the central control system includes a control button (301) arranged on a demonstration table (300). The control button (301) is electrically connected to the first and second driving mechanisms respectively and can control the output forces of the first and second driving mechanisms.

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