Science popularization interaction device for demonstrating phenomenon of generating electricity by magnetism

Abstract

The utility model discloses a science popularization interaction device for demonstrating a phenomenon of generating electricity by magnetism, which comprises a display panel, and a hand-cranking mechanism, a rotor, a permanent magnet stator, a first ampere meter, a second ampere meter and an electric brush bracket which are arranged on the display panel, the two ends of a coil of the rotor are electrically connected with the two sliding rings and the two semicircular rings of the commutator respectively, the brush support is provided with a first brush and a second brush which are electrically connected with the two sliding rings respectively, and a third brush and a fourth brush which are electrically connected with the commutator and located on the two sides of the commutator respectively, and the first brush and the second brush are connected with a first ampere meter. The third and fourth brushes are connected with a second ammeter. The device can demonstrate the formation of alternating current and direct current at the same time, so that a user can deeply understand the principles of magnetic electricity, direct current and alternating current.

Description

Technical Field

[0001] The utility model relates to the technical field of physics exhibition teaching tools, in particular to a popular science interactive device for demonstrating magnetoelectricity phenomenon. Background Art

[0002] Magnetoelectric technology belongs to the field of electromagnetism. Demonstrations of magnetoelectric phenomena are mostly presented in the form of scientific teaching aids. Existing teaching aids for demonstrating magnetoelectric phenomena can usually only demonstrate the formation of alternating current or the formation of direct current, and cannot demonstrate the formation of alternating current and direct current at the same time. As a result, users cannot compare the generation phenomena of direct current and alternating current, and cannot have a deeper understanding of the principles of magnetoelectricity.

[0003] Therefore, there is an urgent need for a popular science interactive device that can simultaneously demonstrate the formation of alternating current and direct current so that users can have a deeper understanding of the magnetoelectric phenomenon. Utility Model Content

[0004] The purpose of the utility model is to provide a popular science interactive device for demonstrating magnetoelectricity phenomenon, which can simultaneously demonstrate the formation of alternating current and direct current, so that users can have a deeper understanding of the principles of magnetoelectricity and direct current and alternating current.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a popular science interactive device for demonstrating magnetoelectricity phenomenon, comprising:

[0007] A display panel and a hand-cranked mechanism, a rotor, a permanent magnet stator, a first ammeter, a second ammeter and a brush holder arranged on the display panel, the rotor is connected to the hand-cranked mechanism, the permanent magnet stator is arranged on both sides of the coil of the rotor, a commutator consisting of two semicircular rings and two slip rings are arranged on the rotating shaft of the rotor, two ends of the coil of the rotor are respectively electrically connected to the two slip rings and the two semicircular rings of the commutator, the brush holder is provided with a first and a second brush electrically connected to the two slip rings respectively, and a third and a fourth brush electrically connected to the commutator and respectively located on both sides of the commutator, the first and the second brushes are respectively electrically connected to the two terminals of the first ammeter, and the third and the fourth brushes are respectively electrically connected to the two terminals of the second ammeter.

[0008] Furthermore, the hand-cranked mechanism includes: a fixed bracket arranged on the display panel, a hand-turned wheel, a synchronous wheel and a driven wheel are arranged on the fixed bracket, a rotating handle is arranged on the hand-turned wheel, the hand-turned wheel is connected to the synchronous wheel through a transmission shaft, the synchronous wheel is connected to the driven wheel through a transmission belt, and the driven wheel is connected to the rotating shaft of the rotor.

[0009] Optionally, the popular science interactive device for demonstrating magnetoelectric phenomenon provided by the utility model further includes:

[0010] The first and second light emitting diodes are arranged on the display panel, the first and second light emitting diodes are connected in parallel and connected in series between the first brush and one terminal of the first ammeter, the second brush is connected to the other terminal of the first ammeter, and the first and second light emitting diodes are turned on in opposite directions;

[0011] The third and fourth light emitting diodes are arranged on the display panel. The third and fourth light emitting diodes are connected in parallel and then connected in series between the third brush and one terminal of the second ammeter. The fourth brush is connected to the other terminal of the second ammeter. The conduction directions of the third and fourth light emitting diodes are opposite.

[0012] Optionally, the two slip rings are respectively located on both sides of the commutator along the rotation axis direction of the rotor, and are respectively integrated with the two semicircular rings of the commutator.

[0013] Furthermore, a wire groove is provided on the display panel.

[0014] Optionally, the popular science interactive device for demonstrating magnetoelectric phenomenon provided by the utility model further includes: a suitcase, wherein the display panel is arranged inside one side of the suitcase body, facing the suitcase lid, and its edge is engaged with the edge of the suitcase body.

[0015] Optionally, the popular science interactive device for demonstrating magnetoelectric phenomenon provided by the utility model further includes: a transparent protective cover, which is arranged above the display panel, and a hole is arranged on one side of the transparent protective cover, and a transmission shaft passes through the hole and is connected to a hand-turned wheel located outside the transparent protective cover.

[0016] Optionally, the first, second, third and fourth brushes are all carbon brushes.

[0017] The utility model provides a popular science interactive device for demonstrating magnetoelectric phenomena. By simultaneously arranging a slip ring for outputting alternating current and a commutator for outputting direct current on the rotor, the magnetoelectric phenomena of alternating current and direct current can be demonstrated simultaneously, allowing users to more intuitively experience the difference between direct current and alternating current. The magnetoelectric related components and connection lines of the device are laid out on the display panel. Users can observe the rotor, commutator and slip ring structure, clearly see the line direction through the wire groove, observe the circuit connection, operate the rotating handle and observe the deflection of the ammeter and the on and off of the light-emitting diode, so as to more intuitively experience the difference between direct current and alternating current. At the same time, it can also inspire users to think about why the on and off states of the lights on both sides are different, prompting users to conduct in-depth learning, and then deeply understand the principle of the commutator and the generation principle of direct current and alternating current. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a popular science interactive device for demonstrating magnetoelectricity provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the partial structure of a popular science interactive device for demonstrating magnetoelectricity provided by an embodiment of the utility model;

[0021] Figure 3 A top view of the partial structure of a popular science interactive device for demonstrating magnetoelectricity provided by an embodiment of the utility model;

[0022] Figure 4 Another partial structural schematic diagram of the popular science interactive device for demonstrating magnetoelectric phenomenon provided by an embodiment of the utility model;

[0023] Among them: 1. display panel; 4. permanent magnet stator; 5. first ammeter; 6. second ammeter; 7. brush holder; 8. rotating shaft; 9. commutator; 10. slip ring; 11. coil; 12. first brush; 13. second brush; 14. third brush; 15. fourth brush; 16. fixed bracket; 17. hand wheel; 20. turning handle; 21. transmission shaft; 22. transmission belt; 23. first light-emitting diode; 24. second light-emitting diode; 25. third light-emitting diode; 26. fourth light-emitting diode; 27. wire groove; 28. transparent protective cover; 29. ​​hole; 30. synchronous wheel; 31. driven wheel. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The purpose of the utility model is to provide a popular science interactive device for demonstrating magnetoelectric phenomenon, so as to solve the problems existing in the prior art, and to enable users to have a deeper understanding of magnetoelectric phenomenon by simultaneously demonstrating the formation of alternating current and direct current.

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figures 1 to 4 As shown, the popular science interactive device for demonstrating magnetoelectric phenomenon provided by the embodiment of the utility model comprises: a display panel 1 and a hand-cranked mechanism arranged on the display panel 1, a rotor, a permanent magnet stator 4, a first ammeter 5, a second ammeter 6 and a brush holder 7, wherein the rotor is composed of a rotating shaft 8 and a coil 11 arranged on the rotating shaft 8 through a coil frame, and the first ammeter 5 and the second ammeter 6 are preferably bidirectional pointer ammeters. The permanent magnet stator 4 is arranged on both sides of the coil 11 of the rotor, and the NS opposite polarity of the permanent magnet stator 4 is placed relative to each other. A commutator 9 composed of two semicircular rings and two slip rings 10 are arranged on the rotating shaft 8 of the rotor, and the two ends of the coil 11 of the rotor are electrically connected to the two slip rings 10 and the two semicircular rings of the commutator 9, that is, one end of the coil 11 is connected to a slip ring and a semicircular ring, and the other end is connected to another slip ring and another semicircular ring.

[0028] The brush holder 7 is provided with a first brush 12 and a second brush 13 which are electrically connected to the two slip rings 10, respectively, and a third brush 14 and a fourth brush 15 which are electrically connected to the commutator 9 and are respectively located on both sides of the commutator 9. The first brush 12 and the second brush 13 output alternating current and are respectively connected to the two terminals of the first ammeter 5 through a wire. The third brush 14 and the fourth brush 15 output direct current and are respectively connected to the two terminals of the second ammeter 6 through a wire. The first, second, third and fourth brushes are preferably carbon brushes.

[0029] The rotating shaft 8 of the rotor is connected to the hand-crank mechanism, which includes: a fixed bracket 16 arranged on the display panel 1, a hand-turned wheel 17, a synchronous wheel 30 and a driven wheel 31 are arranged on the fixed bracket 16, a rotating handle 20 is arranged on the hand-turned wheel 17, the hand-turned wheel 17 is connected to the synchronous wheel 30 through a transmission shaft 21, the synchronous wheel 30 is connected to the driven wheel 31 through a transmission belt 22, and the driven wheel 31 is connected to the rotating shaft 8 of the rotor, that is, the user can drive the rotor to rotate by operating the rotating handle 20. A wire groove 27 is provided on the display panel 1, and the wire is located in the wire groove 27.

[0030] The above-mentioned popular science interactive device for demonstrating the magnetoelectric phenomenon realizes the simultaneous demonstration of the magnetoelectric phenomenon of AC and DC by simultaneously arranging a slip ring for outputting AC power and a commutator for outputting DC power on the rotor, allowing users to more intuitively experience the difference between DC and AC power.

[0031] The device's magnetoelectric components and connection lines are laid out on the display panel. Users can observe the rotor, commutator and slip ring structure, clearly see the line direction through the wire groove, observe the circuit connection, operate the turning handle and observe the deflection status of the two bidirectional pointer ammeters. The ammeter connected to direct current will only deflect in one direction, and the ammeter connected to alternating current will deflect alternately left and right. This way, users can feel the difference in current direction between direct current and alternating current, and further understand the principle of the commutator and the generation principle of direct current and alternating current.

[0032] In a preferred embodiment, the two slip rings 10 are respectively located on both sides of the commutator 9 along the direction of the rotor shaft 8, and are respectively integrated with the two semicircular rings of the commutator 9, that is, one slip ring 10 is integrated with one semicircular ring, and the other slip ring 10 is integrated with the other semicircular ring, so that the slip ring and the semicircular ring can be connected to one end of the rotor coil as a whole, and the overall structure is simple and easy to observe.

[0033] In an embodiment of the present invention, the popular science interactive device for demonstrating magnetoelectricity phenomenon further includes: a first light emitting diode 23 , a second light emitting diode 24 , a third light emitting diode 25 and a fourth light emitting diode 26 arranged on the display panel 1 .

[0034] The first light emitting diode 23 and the second light emitting diode 24 are connected in parallel and then connected in series between the first brush 12 and one terminal of the first ammeter 5, and the second brush 13 is connected to the other terminal of the first ammeter 5. The first light emitting diode 23 and the second light emitting diode 24 are turned on in opposite directions. The third light emitting diode 25 and the fourth light emitting diode 26 are connected in parallel and then connected in series between the third brush 14 and one terminal of the second ammeter 6, and the fourth brush 15 is connected to the other terminal of the second ammeter 6. The third light emitting diode 25 and the fourth light emitting diode 26 are turned on in opposite directions.

[0035] That is, two LEDs with opposite conduction directions are added to both the DC circuit and the AC circuit. Users can observe the on and off of the LEDs while observing the deflection of the ammeter. At the DC end, only one LED is lit, and at the AC end, both LEDs flash, which more intuitively demonstrates the difference between DC and AC. It can also inspire users to think about why the lights on and off on both sides are different, prompting users to learn more.

[0036] In this embodiment, two light emitting diodes are connected in parallel and then in series with an ammeter. In other embodiments, the light emitting diode and the ammeter may also be connected in parallel.

[0037] Furthermore, the popular science interactive device for demonstrating magnetoelectric phenomenon provided by the utility model further includes: a transparent protective cover 28, which is arranged above the display panel 1, and a hole 29 is arranged on one side of the transparent protective cover 28, and the transmission shaft 21 passes through the hole 29 and is connected to the hand wheel 17 located outside the transparent protective cover 28. The user can use the device by turning the handle outside the protective cover, and the protective cover prevents the user from accidentally touching the internal structure, so as to increase the service life of the device and ensure the user's safety.

[0038] In a preferred embodiment, the popular science interactive device for demonstrating magnetoelectric phenomenon provided by the utility model further includes: a suitcase, the display panel is arranged inside one side of the suitcase body, facing the suitcase lid, and its edge is engaged with the edge of the case body. When in use, the suitcase is laid flat, and the lid is opened to present the display panel for use. The demonstration structure of the device is placed in a movable and portable case, and the overall appearance is beautiful and easy to carry. It can be used for both mobile popular science interactive demonstrations and popular science interactive demonstrations in a fixed place, which greatly enhances the applicability of multiple scenarios.

[0039] The utility model provides a popular science interactive device for demonstrating magnetoelectric phenomena. By simultaneously arranging a slip ring for outputting alternating current and a commutator for outputting direct current on the rotor, the magnetoelectric phenomena of alternating current and direct current can be demonstrated simultaneously, allowing users to more intuitively experience the difference between direct current and alternating current. The magnetoelectric related components and connection lines of the device are laid out on the display panel. Users can observe the rotor, commutator and slip ring structure, clearly see the line direction through the wire groove, observe the circuit connection, operate the rotating handle and observe the deflection of the ammeter and the on and off of the light-emitting diode, so as to more intuitively experience the difference between direct current and alternating current. At the same time, it can also inspire users to think about why the on and off states of the lights on both sides are different, prompting users to conduct in-depth learning, and then deeply understand the principle of the commutator and the generation principle of direct current and alternating current.

[0040] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A popular science interactive device for demonstrating magnetoelectricity, characterized in that: include: A display panel and a hand-cranked mechanism, a rotor, a permanent magnet stator, a first ammeter, a second ammeter and a brush holder arranged on the display panel, wherein the rotor is connected to the hand-cranked mechanism, the permanent magnet stator is arranged on both sides of the coil of the rotor, a commutator consisting of two semicircular rings and two slip rings are arranged on the rotating shaft of the rotor, two ends of the coil of the rotor are respectively electrically connected to the two slip rings and the two semicircular rings of the commutator, the brush holder is provided with a first and a second brush electrically connected to the two slip rings respectively, and a third and a fourth brush electrically connected to the commutator and respectively located on both sides of the commutator, the first and the second brushes are respectively electrically connected to the two terminals of the first ammeter, and the third and the fourth brushes are respectively electrically connected to the two terminals of the second ammeter.

2. The popular science interactive device for demonstrating magnetoelectric phenomenon according to claim 1, characterized in that: The hand-crank mechanism includes: a fixed bracket arranged on the display panel, a hand-turned wheel, a synchronous wheel and a driven wheel are arranged on the fixed bracket, a rotating handle is arranged on the hand-turned wheel, the hand-turned wheel is connected to the synchronous wheel through a transmission shaft, the synchronous wheel is connected to the driven wheel through a transmission belt, and the driven wheel is connected to the rotating shaft of the rotor.

3. The popular science interactive device for demonstrating magnetoelectric phenomenon according to claim 1, characterized in that: Also includes: A first and a second light emitting diode are arranged on the display panel, the first and the second light emitting diodes are connected in parallel and then connected in series between the first brush and one terminal of the first ammeter, the second brush is connected to the other terminal of the first ammeter, and the first and the second light emitting diodes are turned on in opposite directions; The third and fourth light emitting diodes are arranged on the display panel, and the third and fourth light emitting diodes are connected in parallel and in series between the third brush and one terminal of the second ammeter, and the fourth brush is connected to the other terminal of the second ammeter, and the conduction directions of the third and fourth light emitting diodes are opposite.

4. The popular science interactive device for demonstrating magnetoelectric phenomenon according to claim 1, characterized in that: The two slip rings are respectively located on both sides of the commutator along the rotation axis direction of the rotor, and are respectively integrated with the two semicircular rings of the commutator.

5. The popular science interactive device for demonstrating magnetoelectric phenomenon according to claim 1, characterized in that: A wire groove is provided on the display panel.

6. The popular science interactive device for demonstrating magnetoelectric phenomenon according to claim 1, characterized in that: Also includes: The display panel is arranged in one side of the suitcase body, facing the cover of the suitcase, and its edge is engaged with the edge of the suitcase body.

7. The popular science interactive device for demonstrating magnetoelectric phenomenon according to claim 2, characterized in that: Also includes: A transparent protective cover is arranged above the display panel, a hole is arranged on one side of the transparent protective cover, and the transmission shaft passes through the hole and is connected with the hand-turned wheel located outside the transparent protective cover.

8. The popular science interactive device for demonstrating magnetoelectric phenomenon according to claim 1, characterized in that: The first, second, third and fourth brushes are all carbon brushes.

Images