Reference system and inertia demonstration instrument

Abstract

The utility model relates to a reference system and inertia demonstration instrument, which comprises a conveyor belt device, an ejection device and a water dripping device, the conveyor belt device is mutually independent from the ejection device and the water dripping device, the ejection device and the water dripping device are detachably arranged on the conveyor belt device, and when the conveyor belt device is static, the ejection device and the water dripping device are arranged on the conveyor belt device. The ejection device and the water dripping device are kept static relative to the conveying belt device, and when the conveying belt device does uniform linear motion, the ejection device and the water dripping device keep uniform linear motion relative to the conveying belt device. The inertia demonstration instrument is simple in structure, and can not only demonstrate static inertia characteristics of an object, but also demonstrate dynamic inertia characteristics of the object, so that students can feel pleasant, intuitively and deeply understand the inertia law in all directions.

Description

Technical Field

[0001] The utility model relates to the field of physical teaching aid experiments, in particular to a reference system and inertia demonstrator. Background Art

[0002] Inertia is a property of an object, which is manifested in that the object always maintains its original state of motion, that is, stationary or uniform linear motion. Inertia is a relatively abstract concept. The understanding of inertia and the explanation of the inertial phenomenon can only be achieved through experimental exploration, guiding students to observe and analyze, and then draw conclusions, so that students can truly integrate the knowledge. Therefore, the design and demonstration of experiments are particularly important. In physics teaching, inertia experiments need to demonstrate the inertia of objects in motion and objects in stationary states respectively. The existing teaching instruments for demonstrating inertia are not only boring in demonstration methods, monotonous in demonstration content, and incomplete in knowledge coverage, but most of them only demonstrate the basic properties of inertia when the object is stationary, and lack teaching aids to demonstrate the inertia of objects in motion. When explaining, teachers can only draw pictures on the blackboard, which is time-consuming and laborious, and it is not easy for students to understand and grasp. Utility Model Content

[0003] The purpose of the utility model is to provide a reference system and inertia demonstrator, which can not only display the inertial characteristics of static objects, but also display the inertial characteristics of moving objects through a conveyor belt device, a catapult device, and a water dripping device, so that students can have a pleasant intuitive feeling and a comprehensive and in-depth understanding of the law of inertia.

[0004] A reference system and inertial demonstrator, characterized in that it includes a conveyor belt device, an ejection device, and a water dripping device, wherein the conveyor belt device is independent of the ejection device and the water dripping device, and the ejection device and the water dripping device can be detachably arranged on the conveyor belt device. When the conveyor belt device is stationary, the ejection device and the water dripping device remain stationary relative to the conveyor belt device, and when the conveyor belt device performs uniform linear motion, the ejection device and the water dripping device maintain uniform linear motion relative to the conveyor belt device.

[0005] In the above technical solution, the ejection device and the water dripping device can demonstrate the inertia of an object in a stationary state or a moving state. When the ejection device and the water dripping device are placed on a conveyor belt device and the conveyor belt device remains stationary, the ejection device and the water dripping device remain stationary relative to the conveyor belt device; when the conveyor belt device performs uniform linear motion, the ejection device and the water dripping device maintain uniform linear motion relative to the conveyor belt device.

[0006] Furthermore, the conveyor belt device includes a base body, a conveyor belt, and a driving member. The conveyor belt and the driving member are respectively arranged on the base body, and the driving member drives the conveyor belt to move along one side of the length direction of the base body.

[0007] In the above technical solution, the driving member drives the conveyor belt to move along one side of the length direction of the seat body, so as to observe the inertia of the objects in the ejection device and the dripping device in the moving state.

[0008] Furthermore, the seat body has a supporting surface, and the seat body is supported by the supporting surface so that the surface of the conveyor belt is horizontal.

[0009] In the above technical solution, the seat body is supported by the supporting surface, so that the surface of the conveyor belt is horizontal, ensuring that the ejection device and the dripping device are horizontal when placed on the conveyor belt, so as to better observe the inertia of the object.

[0010] Furthermore, the ejection device includes a first box body, an ejection tube, a compression spring, a metal rod, a metal sheet, and an electromagnet arranged in the first box body, the first box body has a first through hole, the metal rod is inserted into the first box body through the first through hole, one end of the compression spring is connected to the first box body and is sleeved on the outer circumference of the metal rod, the other end of the compression spring is connected to the ejection tube, and the metal sheet is connected to the end of the metal rod away from the first through hole.

[0011] In the above technical solution, the compression spring is connected to the ejection tube and is sleeved on the outer circumference of the metal rod. The metal rod is connected to the metal sheet. When the electromagnet is energized, the metal rod compresses the compression spring under the action of magnetic force, and the ejection tube is also pressed down due to the compression of the compression spring. At this time, the power supply is cut off. After the power is cut off, the magnetic force of the metal rod disappears, and the ejection tube bounces high under the action of the compression spring.

[0012] Furthermore, the metal sheet is opposite to the electromagnet.

[0013] In the above technical solution, the metal sheet is opposite to the electromagnet, and the metal sheet increases the force-bearing area of ​​the metal rod and the electromagnet. When the metal sheet is opposite to the electromagnet, the magnetic force of the electromagnet on the metal rod is further increased, so that the compression spring is pressed down under the action of the magnetic force.

[0014] Furthermore, a spherical body is provided in the ejection tube.

[0015] In the above technical solution, when the conveyor belt remains stationary and the compression spring is pressed down by the magnetic force, the ball arranged in the ejection tube is also pressed down accordingly. At this time, the electromagnet is powered off, the magnetic force on the metal rod disappears, and the compression spring that has lost its magnetic force returns to its original state under its own elasticity. The ball arranged in the ejection tube is vertically ejected upward under the action of the compression spring. At this time, the ejected ball still falls into the ejection tube by inertia; when the conveyor belt performs uniform linear motion, the ball is vertically ejected upward from the ejection tube, and the light ball still falls into the ejection tube; when the conveyor belt performs accelerated linear motion, the light ball is vertically ejected upward from the ejection tube, and the light ball will fall behind the ejection tube; when the conveyor belt performs decelerated linear motion, the light ball is vertically ejected upward from the ejection tube, and the light ball will fall in front of the ejection tube.

[0016] Furthermore, the dripping device includes a second box body, a bottom tube, and a water storage member, the water storage member has openings at both ends, the second box body has a second through hole, the water storage member is inserted into the second box body through the second through hole, and the bottom tube is disposed in the second box body and vertically opposite to the water storage member.

[0017] In the above technical scheme, the water storage component is inserted into the second box body, and the bottom cylinder arranged at the bottom of the second box body is vertically opposite to the water storage component. When the conveyor belt remains stationary and the water storage component contains water, the water falls into the bottom cylinder; when the conveyor belt makes uniform linear motion and the water storage component contains water, the water still falls into the bottom cylinder; when the conveyor belt makes accelerated linear motion and the water storage component contains water, the water will fall behind the bottom cylinder; when the conveyor belt makes decelerated linear motion and the water storage component contains water, the water will fall in front of the bottom cylinder.

[0018] Furthermore, the water storage component is a funnel structure, and the funnel structure is opposite to the bottom tube.

[0019] In the above technical solution, the water storage member is a funnel structure, and the funnel structure is opposite to the bottom tube, so as to facilitate the control of the flow rate of water.

[0020] Compared with the prior art, the utility model has the following beneficial effects: taking the conveyor belt device as the reference system, setting the ejection device and the water dripping device, realizing the same device, vividly demonstrating the characteristics of the inertial motion of objects under different states, which is conducive to breaking through the understanding of the concept of inertia among middle school students in physics learning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a motion schematic diagram of the reference system and the ejection device of the inertial demonstrator according to an embodiment of the utility model.

[0022] Figure 2 It is a schematic diagram of the movement of the reference system and the water dripping device of the inertial demonstrator according to an embodiment of the utility model.

[0023] Figure 3 It is a schematic structural diagram of a reference system and an inertial demonstrator ejection device according to an embodiment of the utility model.

[0024] Figure 4 It is a structural schematic diagram of the reference system and the water dripping device of the inertial demonstrator according to an embodiment of the utility model.

[0025] Description of Figure Numbers

[0026] Conveyor belt device 1, base body 101, support surface 1011, conveyor belt 102, driving member 103, ejection device 2, first box body 201, first through hole 2011, ejection tube 202, compression spring 203, metal rod 204, metal sheet 205, electromagnet 206, sphere 207, water dripping device 3, second box body 301, second through hole 3011, bottom tube 302, water storage member 303, funnel structure 3031. DETAILED DESCRIPTION

[0027] The reference system and inertial demonstrator of the present invention will be further described in detail below in conjunction with specific embodiments and drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0028] Please also refer to Figure 1 and Figure 2 In a preferred embodiment, the reference system and inertial demonstrator of the utility model includes a conveyor belt device 1, an ejection device 2, and a water dripping device 3. The conveyor belt device 1 is independent of the ejection device 2 and the water dripping device 3. The ejection device 2 and the water dripping device 3 can be detachably arranged on the conveyor belt device 1. When the conveyor belt device is stationary, the ejection device 2 and the water dripping device 3 remain stationary relative to the conveyor belt device 1. When the conveyor belt device 1 performs uniform linear motion, the ejection device 2 and the water dripping device 3 maintain uniform linear motion relative to the conveyor belt device 1.

[0029] It can be seen from the above technical scheme that the ejection device 2 and the water dripping device 3 can demonstrate the inertia of an object in a stationary state or a moving state. When the ejection device 2 and the water dripping device 3 are placed on the conveyor belt device 1 and the conveyor belt device 1 remains stationary, the ejection device 2 and the water dripping device 3 remain stationary relative to the conveyor belt device 1; when the conveyor belt device 1 performs uniform linear motion, the ejection device 2 and the water dripping device 3 maintain uniform linear motion relative to the conveyor belt device 1.

[0030] Specifically, in this embodiment, the conveyor belt device 1 includes a base 101, a conveyor belt 102, and a driving member 103. The conveyor belt 102 and the driving member 103 are respectively arranged on the base 101, and the driving member 103 drives the conveyor belt 102 to move along one side of the length direction of the base 101. The driving member 103 drives the conveyor belt 102 to move along one side of the length direction of the base 101, so as to observe the inertia of the ejection device 2 and the dripping device 3 in motion. When the conveyor belt 102 remains stationary, the ejection device 2 and the dripping device 3 remain stationary relative to the conveyor belt 102; when the conveyor belt 102 performs uniform linear motion, the ejection device 2 and the dripping device 3 perform uniform linear motion relative to the conveyor belt 102.

[0031] Please refer to Figure 1 In this embodiment, the seat body 101 has a support surface 1011, and the seat body 101 is supported by the support surface 1011 to make the surface of the conveyor belt 102 horizontal. The seat body 101 is supported by the support surface 1011, so that the surface of the conveyor belt 102 is horizontal, ensuring that the ejection device 2 and the dripping device 3 are placed on the conveyor belt 102 horizontally, and the inertia of the object can be better observed.

[0032] Please refer to Figure 1 In this embodiment, the ejection device 2 includes a first box body 201, an ejection tube 202, a compression spring 203, a metal rod 204, a metal sheet 205, and an electromagnetic device 206 arranged in the first box body, wherein the first box body 201 has a first through hole 2011, the metal rod 204 is inserted into the first box body 201 through the first through hole 2011, one end of the compression spring 203 is connected to the first box body 201 and is sleeved on the outer periphery of the metal rod 204, the other end of the compression spring 203 is connected to the ejection tube 202, and the end of the metal rod 204 away from the first through hole 2011 is connected to the metal sheet 205. The compression spring 203 is connected to the ejection tube 202 and is sleeved on the outer circumference of the metal rod 204. The metal rod 204 is connected to the metal sheet 205. When the electromagnet 206 is energized, the metal rod 204 compresses the compression spring 203 under the action of the magnetic force, and the ejection tube 202 is also pressed down under the compression of the compression spring 203. At this time, the power is cut off. After the power is cut off, the magnetic force of the metal rod 204 disappears, and the ejection tube 202 bounces high under the action of the compression spring 203.

[0033] At the same time, the metal sheet 205 is opposite to the electromagnetic device 206. The metal sheet 205 is opposite to the electromagnetic device 206, and the metal sheet 205 increases the force-bearing area of ​​the metal rod 204 and the electromagnetic device 206. When the metal sheet 205 is opposite to the electromagnetic device 206, the magnetic force of the electromagnetic device 206 on the metal rod 204 is further increased, so that the compression spring 203 is pressed down under the action of the magnetic force.

[0034] When demonstrating that a moving object has inertia, first place a ball 207 in the ejection tube 202. When the conveyor belt 102 remains stationary and the compression spring 203 is pressed down by the magnetic force, the ball 207 placed in the ejection tube 202 is also pressed down. At this time, the electromagnetic device 206 is powered off, the magnetic force on the metal rod 204 disappears, and the compression spring 203 without magnetic force recovers to its original state under its own elasticity. The ball 207 in the ejection tube 202 is ejected vertically upward under the action of the compression spring 203. At this time, the ball 207 that is vertically ejected is not subjected to force in the horizontal direction, so the light ball 207 still falls into the ejection tube 202 with the help of inertia. When the conveyor belt 103 performs uniform linear motion and the ball 207 is ejected vertically upward from the ejection tube 202, the ball 207 that is vertically ejected will maintain its original uniform linear motion state because it is not subjected to force in the horizontal direction, that is, it will continue to perform uniform linear motion in the horizontal direction. After a certain period of time, the ball 207 will fall into the ejection tube 202 again; when the conveyor belt 103 performs accelerated linear motion and the light ball 207 is ejected vertically upward from the ejection tube 202, the light ball 207 will be subjected to force in the horizontal direction. When the conveyor belt 103 performs a decelerating linear motion and the light ball 207 is ejected vertically upward from the ejection tube 202, similarly, the light ball 207 will be acted upon by a force in the horizontal direction and will no longer satisfy the conditions of the law of inertia, so the light ball 207 will not be able to fall back into the original ejection tube 202, but will fall in front of the ejection tube.

[0035] When demonstrating that a stationary object has inertia, a plate without surrounding walls is connected to the ejection tube 202, and a lightweight ball 207 is placed on the plate. At the same time, the electromagnet 206 is always energized to prevent the lightweight ball 207 from being ejected. The metal rod 204 is pressed down by the compression spring 203 under the action of the magnetic force, and the conveyor belt 102 is started. At this time, it can be observed that the ejection device 2 leaves the original position with the movement of the conveyor belt 102, but the lightweight ball 207 will fall into the first box body 201 instead of falling into the plate body, that is, when the ejection device 2 moves, the lightweight ball 207 still remains stationary in the horizontal direction and falls just below its initial position, thereby demonstrating that a stationary object has inertia.

[0036] Please refer to Figure 2In this embodiment, the dripping device 3 includes a second box body 301, a bottom cylinder 302, and a water storage member 303. The water storage member 303 has openings 3031 at both ends. The second box body 301 has a second through hole 3011. The water storage member 303 is inserted into the second box body 301 through the second through hole 3011. The bottom cylinder 302 is arranged in the second box body 301 and vertically opposite to the water storage member 303. The water storage member 303 is inserted into the second box body 301, and the bottom cylinder 302 arranged at the bottom of the second box body 301 is vertically opposite to the water storage member 303.

[0037] When demonstrating that liquid has inertia, water is filled into the water storage part 303, the bottom tube 302 is not filled with water, the conveyor belt 102 remains stationary, and the water falls into the bottom tube 302; when the conveyor belt 102 performs uniform linear motion, the water still falls into the bottom tube 302; when the conveyor belt 102 performs accelerated linear motion, the water will fall behind the bottom tube 302; when the conveyor belt performs decelerated linear motion, the water will fall in front of the bottom tube 302.

[0038] Specifically, the water storage member 303 of this embodiment is a funnel structure 3031, and the funnel structure 3031 is opposite to the bottom tube 302. The water storage member 303 is a funnel structure 3031, and the funnel structure 3031 is opposite to the bottom tube 302, which is convenient for controlling the flow rate of water.

[0039] During specific implementation, the ejection device 2 and the dripping device 3 are detachably arranged on the conveyor belt device. On the one hand, the conveyor belt device, the ejection device 2 and the dripping device 3 are modularized to facilitate installation and maintenance. On the other hand, it ensures that when the conveyor belt 102 switches from a moving state to a stationary state, the ejection device 2 and the dripping device 3 can be quickly stationary. The conveyor belt 102 moves through the power provided by the driving member 103. The driving member 103 can control the conveyor belt to perform uniform linear motion, accelerated motion or decelerated motion to meet the inertial characteristics of objects at different speeds.

[0040] It should be noted that, in the present embodiment, the first box body 201 and the second box body 301 are made of acrylic plates, and the ejection tube 202 and the water storage member 303 both use bottle caps, which is not only convenient for assembly but also saves costs. The funnel structure 3031 of the water storage member 303 is formed by connecting a pointed mouth with a bottle cap, and the bottom tube 302 is made of a water pipe. The overall structure is simple and the production cost is low.

[0041] In the description of the present invention, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the instrument or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A reference system and inertial demonstrator, characterized in that: The utility model comprises a conveyor belt device, an ejection device, and a water dripping device. The conveyor belt device is independent of the ejection device and the water dripping device. The ejection device and the water dripping device can be detachably arranged on the conveyor belt device. When the conveyor belt device is stationary, the ejection device and the water dripping device remain stationary relative to the conveyor belt device. When the conveyor belt device performs uniform linear motion, the ejection device and the water dripping device maintain uniform linear motion relative to the conveyor belt device.

2. The reference system and inertial demonstrator according to claim 1, characterized in that: The conveyor belt device comprises a seat body, a conveyor belt, and a driving member. The conveyor belt and the driving member are respectively arranged on the seat body, and the driving member drives the conveyor belt to move along one side of the length direction of the seat body.

3. The reference system and inertial demonstrator according to claim 2, characterized in that: The seat body has a supporting surface, and the seat body is supported by the supporting surface so that the surface of the conveyor belt is horizontal.

4. The reference system and inertial demonstrator according to claim 2, characterized in that: The ejection device includes a first box body, an ejection tube, a compression spring, a metal rod, a metal sheet, and an electromagnetic device arranged in the first box body, the first box body has a first through hole, the metal rod is inserted into the first box body through the first through hole, one end of the compression spring is connected to the first box body and sleeved on the outer circumference of the metal rod, the other end of the compression spring is connected to the ejection tube, and the metal sheet is connected to the end of the metal rod away from the first through hole.

5. The reference system and inertial demonstrator according to claim 4, characterized in that: The metal sheet is opposite to the electromagnet.

6. The reference system and inertial demonstrator according to claim 4, characterized in that: A sphere is arranged in the ejection tube.

7. The reference system and inertial demonstrator according to claim 2, characterized in that: The dripping device includes a second box body, a bottom tube, and a water storage member. The water storage member has openings at both ends. The second box body has a second through hole. The water storage member is inserted into the second box body through the second through hole. The bottom tube is arranged in the second box body and vertically opposite to the water storage member.

8. The reference system and inertial demonstrator according to claim 7, characterized in that: The water storage member is a funnel structure, and the funnel structure is opposite to the bottom tube.

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