CN219872641U

CN219872641U - Science popularization science education apparatus and hand power generation structure thereof

Info

Publication number: CN219872641U
Application number: CN202321269453.5U
Authority: CN
Inventors: 聂青龙
Original assignee: Shenzhen Ideas Education Technology Co ltd
Current assignee: Shenzhen Ideas Education Technology Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-10-20
Anticipated expiration: 2033-05-24

Abstract

The utility model provides a hand-operated power generation structure of a science and education appliance and the science and education appliance adopting the hand-operated power generation structure, and particularly relates to the technical field of science and education, the hand-operated power generation structure comprises a rocking handle, an acceleration transmission assembly and a generator, the acceleration transmission assembly comprises a rotating shaft and an acceleration gear assembly connected with the rotating shaft, a fastening assembly is arranged between the rotating shaft and the rocking handle, the fastening assembly comprises a connecting hole arranged on the rotating shaft, a through hole arranged on the rocking handle and a connecting column penetrating between the connecting hole and the through hole, and the science and education appliance comprises a shell, a scientific principle display assembly arranged on the shell and the hand-operated power generation structure. The hand-operated power generation structure provided by the utility model can effectively prevent the rocking handle from falling off from the rotating shaft, and the provided science popularization and science education application has the advantage of effectively enhancing interactivity with students.

Description

Science popularization science education apparatus and hand power generation structure thereof

Technical Field

The utility model relates to the technical field of science popularization and science education, in particular to a science popularization and science education tool and a hand-operated power generation structure thereof.

Background

Many teaching aids for demonstrating scientific principles require the use of electricity. In order to enhance learning fun, students are attracted to learn, and a hand-operated power generation device is integrated in some teaching aids, so that only when the students operate the hand-operated power generation device, power can be provided for the teaching aids. The hand-operated power generation structure is a structure for generating electric energy by manually driving a rocking handle, and the rocking handle is connected to a motor through a transmission mechanism with a speed increasing function, so that the motor rotates to generate electric energy, the rocking handle is particularly connected with a rotating shaft of the transmission mechanism, a user rotates the rocking handle to drive the rotating shaft to rotate along with the rocking handle, and the rotating shaft is accelerated by the transmission mechanism to drive the motor to rotate, so that power generation is realized.

When the rocking handle drives the rotating shaft to rotate, relative rotation can be generated between the rocking handle and the rotating shaft, on one hand, the rotating force of the rocking handle can not be completely transmitted to the rotating shaft, and manpower is wasted; on the other hand, students may shake the crank frequently with great force due to fun, and the crank may be moved outward along the axis of the rotating shaft to be detached from the rotating shaft after a period of use.

Disclosure of Invention

Therefore, the utility model mainly aims to provide a hand-operated power generation structure for the science and education appliance and the science and education appliance adopting the hand-operated power generation structure, which are fixedly connected with the rocking handle and the rotating shaft, so that the rocking handle is effectively prevented from falling off.

In order to achieve the above object, the technical solution of the embodiment of the present utility model is as follows:

the hand-operated power generation structure of the science and education appliance comprises a rocking handle, an acceleration transmission assembly and a generator, wherein the generator is provided with a motor shaft, the rocking handle is connected with the motor shaft of the generator through the acceleration transmission assembly, the rocking handle can drive the motor shaft to rotate under the driving of external force, the acceleration transmission assembly comprises a rotating shaft and an acceleration gear assembly in transmission connection with one end of the rotating shaft, the other end of the rotating shaft is fixedly connected with the rocking handle, and a fastening assembly is arranged between the other end of the rotating shaft and the rocking handle;

the fastening assembly comprises a connecting hole arranged on the rotating shaft, a through hole arranged on the rocking handle and corresponding to the connecting hole, and a connecting column penetrating between the connecting hole and the through hole, wherein the rotating shaft defines an axial direction, and the connecting hole, the through hole and the connecting column extend along the axial direction.

Further, the rotating shaft is accommodated in the through hole; the connecting column radially extends to form a limit flange, and the diameter of the limit flange is larger than that of the through hole, so that the limit flange is abutted to the edge of the end part of the through hole.

Still further, the spliced pole is along its axial including the first connecting portion, second connecting portion and that link to each other in proper order limit flange, first connecting portion with the connecting hole fastening connection.

Further, the rocking handle comprises a connecting rod, a handle and rocking handle output ends, wherein the handle and the rocking handle output ends are arranged at two ends of the connecting rod, a mounting part is arranged on the connecting rod at a position corresponding to the rocking handle output ends, a mounting hole for mounting the rocking handle output ends is formed in the mounting part along the axial direction of the mounting part, one end of the rocking handle output ends protrudes out of the mounting part, and the other end of the rocking handle output ends is recessed in the mounting part to form a containing cavity;

the accommodating cavity is provided with a cover, and the cover is used for covering the limit flange.

Still further, the surface of first connecting portion is provided with the external screw thread, the internal surface of connecting hole is provided with the internal screw thread, first connecting portion with connect between the hole through external screw thread with internal screw thread fastening connection.

Still further, the diameter of the first connecting portion is smaller than the diameter of the second connecting portion, which is smaller than the diameter of the limit flange.

Further, the rotating shaft is a D-shaped shaft, a radial hole is formed in the output end of the rocking handle, and the radial hole is inserted into the radial hole through a radial connecting column to be abutted to the plane of the D-shaped shaft.

Further, the hand-operated power generation structure further comprises a gear box and a mounting seat, one end of the rotating shaft and the accelerating gear assembly are arranged in the gear box, and the other end of the rotating shaft protrudes out of the gear box and is used for mounting the rocking handle;

the motor shell of the generator is arranged outside the gear box, and the motor shaft extends to the inside of the gear box and is in transmission connection with the acceleration gear assembly;

the mounting seat comprises a first mounting surface and a second mounting surface which are oppositely arranged;

one end of the rotating shaft, which is used for installing the rocking handle, sequentially passes through the second installation surface and the first installation surface and then is fixedly connected with the rocking handle, and the handle of the rocking handle is exposed out of the first installation surface;

the second mounting surface is recessed towards the direction of the first mounting surface to form a mounting groove, and the gear box is embedded in the mounting groove.

In addition, still provide a technical scheme of science popularization science teaching apparatus, including the casing, set up in scientific principle show subassembly and any of the aforesaid on the casing hand power generation structure, scientific principle show subassembly includes the voltage stabilizing circuit who is connected with the motor output, hand power generation structure is operable to pass through motor output voltage extremely voltage stabilizing circuit, through voltage stabilizing circuit is for the operation of scientific principle show subassembly provides the electric energy.

Further, the science popularization and science education appliance further comprises a display screen and a control switch for controlling the display screen to be lightened, the control switch is connected with the output end of the motor, and a high-level signal is obtained according to the output voltage of the output end of the motor to control the display screen to be lightened.

Compared with the prior art, the utility model has the following technical effects:

according to the hand-operated power generation structure provided by the utility model, the fastening component is arranged between the rocking handle and the rotating shaft, so that when the rocking handle drives the rotating shaft to rotate, the relative rotation between the rocking handle and the rotating shaft is limited, on one hand, the rocking handle is effectively prevented from falling off from the rotating shaft, and on the other hand, the rotating force borne by the rocking handle is transmitted to the rotating shaft as much as possible, so that the manpower is saved.

Drawings

FIG. 1 is a schematic plan view of the present utility model;

FIG. 2 is a schematic diagram of the connection of the scientific teaching tool of the present utility model;

FIG. 3 is a schematic diagram of the overall structure of the hand-operated power generation structure of the present utility model;

FIG. 4 is a schematic diagram of an exploded structure of the hand crank power generation structure of the present utility model;

FIG. 5 is a schematic view of the structure of the crank of the present utility model;

FIG. 6 is a schematic view of the overall structure of the connecting column of the present utility model;

FIG. 7 is a schematic diagram of a rear view of the hand crank power generation structure of the present utility model;

FIG. 8 is a schematic view of a mounting base according to the present utility model;

FIG. 9 is a schematic view of the internal structure of the gearbox of the present utility model;

fig. 10 is a schematic view of another view structure of the portion a in fig. 9 according to the present utility model.

Reference numerals illustrate:

10. a hand-operated power generation structure;

100. a rocking handle; 110. a connecting rod; 120. a handle; 130. the output end of the rocking handle; 140. a mounting part; 150. a receiving chamber;

210. a rotating shaft; 211. a plane; 221. a front gear; 222. a first stage accelerating gear unit; 223. a final stage accelerating gear unit; 224. a rear gear;

300. a motor;

410. a connection hole; 420. a through hole; 430. a connecting column; 431. a limit flange; 432. a first connection portion; 433. a second connecting portion;

500. a gear box;

600. a mounting base; 610. a first mounting surface; 620. a second mounting surface; 621. a mounting groove; 622. a mounting hole;

20. a housing;

30. a scientific principle display component;

40. and a display screen.

Detailed Description

The technical scheme of the utility model is further elaborated below by referring to the drawings in the specification and the specific embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. In the following description, reference is made to the expression "some embodiments" which describe a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or a different subset of all possible embodiments and may be combined with each other without conflict.

It will be further understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1-2, an embodiment of the present utility model provides a science and education appliance, which includes a housing 20, a science principle display assembly 30 disposed on the housing 20, and a hand-operated power generation structure 10, wherein the hand-operated power generation structure 10 includes a generator, the science principle display assembly 30 includes a voltage stabilizing circuit connected with an output end of the generator in the hand-operated power generation structure 10, and the output end of the generator in the hand-operated power generation structure 10 outputs a voltage to the voltage stabilizing circuit, and provides electric energy to the operation of the science principle display assembly 30 through the voltage stabilizing circuit, so that the science principle display assembly 30 displays the science principle.

Optionally, the science popularization and education appliance further includes a display screen 40 and a control switch for controlling the display screen 40 to be turned on or turned off, the control switch is turned on when receiving the high-level signal, the corresponding control display screen 40 is turned on, the control switch is turned off when receiving the low-level signal, and the corresponding control display screen 40 is turned off. After the display screen 40 is lightened, a picture for explaining science popularization knowledge can be automatically played, in one example, a student shakes the rocking handle 100 by hand to drive the output end output voltage of the generator 300 to supply power to the scientific principle display assembly 30, at the moment, the scientific principle display assembly 30 works to facilitate the student to intuitively understand the working principle of the student, meanwhile, the control end of the control switch receives a high-level signal according to the output voltage of the output end of the generator 300 to control the display screen 40 to lighten, in the process of continuously shaking the rocking handle 100 by the student, the control end of the control switch can receive a continuous high-level signal, and then the picture for explaining the science popularization knowledge is automatically played, so that the student can directly display the scientific principle display assembly 30 and the explanation picture in the display screen 40 to understand the working principle of the student more deeply. When the student stops shaking the rocking handle 100, no output voltage is outputted from the output end of the generator 300, and accordingly, the scientific principle display assembly 30 no longer obtains power to stop working, the control end of the control switch no longer receives a high-level signal formed by the output voltage of the output end of the generator 300, and accordingly, the display screen 40 stops playing the explanation picture. Optionally, a power button for manual operation of the student is further provided on the housing 20 of the science and general science and education tool, and the student can also control the display screen 40 to be turned on or off by pressing the power button to enable the control switch to receive the high-level signal/low-level signal. When the student does not shake the rocking handle 100 any more, other operations can be performed in the display interface of the display screen 40 to watch more contents related to the scientific principle, and the student can control the display screen 40 to be turned off by pressing the power key, or the display screen 40 can be automatically turned off when no student operation is detected in a certain period of time.

In order to attract the attention of students and improve the interactivity between science popularization and science education tools and the students, the power generation mode of the power generation structure of the science popularization and science education tools provided by the embodiment of the utility model is manual power generation, namely, the hand power generation structure 10 provides electric energy for the scientific principle display assembly 30, so that the scientific principle display assembly 30 operates to display the scientific principle, and a better teaching effect is achieved.

The scientific principle display assembly 30 can be a model assembly designed according to various scientific principles, so that students can observe the structure of the model assembly and principle knowledge used in the operation of the model assembly better, for example, the scientific principle display assembly can be a wind power generation principle model designed according to the wind power generation principle, and comprises a fan and an indicator lamp which are connected with each other, the indicator lamp can be controlled to be lightened after electric energy is generated through rotation of the fan, and the students can understand the principle knowledge that the mechanical energy generated by rotation of the fan is generated according to the operation process of the wind power generation principle model.

In an embodiment of the present utility model, referring to fig. 3, a hand crank structure 10 includes a crank 100, an acceleration transmission assembly, and a generator 300. The generator 300 has a motor shaft, and the crank 100 is connected to the motor shaft of the generator 300 through an acceleration transmission assembly. The rocking handle 100 can drive the motor shaft to rotate under the drive of external force for generator 300 output voltage is to voltage stabilizing circuit, provides the electric energy to the operation of scientific principle show subassembly 30 through voltage stabilizing circuit.

Referring to fig. 4, a rotating shaft 210 is fixedly connected with a rocking handle 100, and a fastening assembly is disposed between the rotating shaft 210 and the rocking handle 100. The fastening assembly includes a coupling hole 410 provided on the rotation shaft 210, a through hole 420 provided on the crank 100 corresponding to the coupling hole 410, and a coupling post 430 passing between the coupling hole 410 and the through hole 420.

Further, referring to fig. 5, the crank 100 includes a connecting rod 110, and a handle 120 and a crank output 130 disposed at both ends of the connecting rod 110. The connection hole 410 is provided along the axial direction of the rotation shaft 210, the through hole 420 is provided along the axial direction of the crank output end 130, and the rotation shaft 210 can be inserted into the through hole 420 of the crank output end 130.

The connecting rod 110 is provided with a mounting portion 140 for mounting the crank output end 130 at a position corresponding to the crank output end 130, the mounting portion 140 is provided with a mounting hole for mounting the crank output end 130 along an axial direction thereof, one end of the crank output end 130 protrudes from the mounting portion 140 for mounting the rotating shaft 210, and the other end is recessed from the mounting portion 140 to form a receiving cavity 150.

Referring to fig. 6, in the illustrated embodiment, the connection post 430 includes a first connection portion 432, a second connection portion 433, and a stop flange 431 connected in sequence in an axial direction. The first connection portion 433 is fixedly connected to the connection hole 410. In the illustrated embodiment, the outer surface of the first connection part 432 is provided with external threads, and the inner surface of the connection hole 410 is provided with internal threads, and the first connection part 432 and the connection hole 410 are fastened together by the external threads and the internal threads.

The diameter of the second connection portion 433 is larger than that of the first connection portion 432, and the second connection portion 433 can be abutted in the through hole 420.

Further, the end of the second connecting portion 433, which is far away from the first connecting portion 432, extends radially outwards to form a limiting flange 431, and after the rocking handle 100 is connected to the rotating shaft 210, the limiting flange 431 abuts against the rocking handle output end 130 and is accommodated in the accommodating cavity 150.

The surface of the limit flange 431 is provided with a cross-shaped groove, which facilitates the application of external force to the connection post 430, so that the crank 100 is fastened to the rotation shaft 210.

Optionally, a cover is provided in the opening direction of the accommodating chamber 150 to cover the connection post 430 from human beings, thereby reducing the possibility of human damage to the connection of the crank 100 with the rotation shaft 210 and increasing the aesthetic appearance.

Alternatively, the shaft 210 is a D-shaped shaft, and the outer cylindrical surface has a plane 211 formed thereon, and the through hole 410 may be a matching D-shape.

Further, the crank output 130 is provided with radial holes, and radial connecting posts are inserted into the radial holes to be abutted against the plane 211 of the rotating shaft 210, so that circumferential relative rotation between the rotating shaft 210 and the through hole 410 is better prevented, wherein the radial connecting posts can be optionally connected with pins or screws.

In the process of installing the rocking handle 100 and the rotating shaft 210, the rocking handle output end 130 of the rocking handle 100 is firstly installed on the periphery of the rotating shaft 210 through the through hole 420, then the end part of the first connecting part 432 of the connecting column 430 is aligned with the through hole 420, when an external force is applied to enable the first connecting part 432 to be abutted against the end part of the connecting hole 410, a screwdriver is used for aligning the cross groove to apply a rotating external force, so that the first connecting part 432 and the connecting hole 410 are tightly connected, the limiting flange 431 is accommodated in the accommodating cavity 150 and abutted against the edge of the outer wall of the through hole 410, and the rocking handle output end 130 is further prevented from being pulled out along the axial direction of the rotating shaft 210.

The hand-operated power generation structure 10 of the utility model further comprises a gear box 500, wherein one end of a rotating shaft 210 and an accelerating gear assembly are arranged in the gear box 500, and the other end of the rotating shaft 210 protrudes out of the gear box 500 for installing a rocking handle 100; the motor housing of the motor 300 is mounted to the outside of the gear case 500, and the motor shaft extends to the inside of the gear case 500 to be in driving connection with the acceleration gear assembly. The gearbox 500 comprises a box body and a cover body matched with the box body, wherein the box body is detachably connected with the cover body, and the later maintenance is convenient.

Further, mounting columns are arranged around the inside of the box body, stud holes are formed in the mounting columns along the axial direction of the mounting columns, and the stud holes penetrate through the bottom of the box body; screw holes corresponding to the stud holes are formed in the periphery of the cover body, and the gear box 500 sequentially penetrates through the screw holes and the stud holes through bolts to be connected in the mounting groove 621 in a threaded mode.

Referring to fig. 7-8 in combination, the hand crank power generation structure 10 of the present utility model further includes a mounting base 600, where the mounting base 600 includes a first mounting surface 610 and a second mounting surface 620 that are disposed opposite to each other; the rotating shaft 210 is used for fastening one end of the rocking handle 100 through the second installation surface 620 and the first installation surface 610 in sequence and then is connected with the rocking handle 100, and at this time, the handle of the rocking handle 100 is exposed out of the first installation surface 610; the second mounting surface 620 is recessed toward the first mounting surface 610 to form a mounting groove 621, and the gear case 500 is fitted in the mounting groove 621.

The second mounting surface 620 is provided with a stud hole along the thickness direction of the mounting seat 600, the stud hole does not penetrate through the first mounting surface 610, the aesthetic degree of the mounting seat 600 is enhanced, the mounting seat 600 is connected in a containing cavity on a body to be mounted through a bolt penetrating through the stud hole in a threaded manner, and the body to be mounted in the utility model is the shell 20 of the optional science popularization teaching tool. When the mounting base 600 is mounted on the housing 20 of the science and education tool, the first mounting surface 610 is exposed to the front surface of the housing 20 of the science and education tool, and the second mounting surface 620 is hidden to the back surface of the housing 20 of the science and education tool.

Referring to fig. 9 to 10, the acceleration transmission assembly includes a rotation shaft 210, and an acceleration gear assembly drivingly connected to one end of the rotation shaft 210, the acceleration gear assembly including a front gear 221, a plurality of stages of acceleration gear units and a rear gear 224 drivingly connected in sequence in a transmission direction; the front gear 221 is sleeved on the rotating shaft 210, the rear gear 224 is sleeved on the motor shaft, and the front gear 221 and the rear gear 224 are respectively connected with a plurality of stages of accelerating gear units in a transmission manner; the radius of the front gear 221 is greater than the radius of the rear gear 224.

Further, each stage of accelerating gear unit comprises a large gear and a small gear which are coaxially arranged, the accelerating gear unit which is in meshed connection with the front gear 221 is defined as a first stage accelerating gear unit 222, and the accelerating gear unit which is in meshed connection with the rear gear 224 is defined as a last stage accelerating gear unit 223; the large gear radius of each stage of the accelerating gear unit is sequentially reduced in the transmission connection direction of the first stage of the accelerating gear unit 222 to the last stage of the accelerating gear unit 223.

Wherein, the front gear 221 is meshed with the pinion gear of the first stage accelerating gear unit 222, and drives the first stage accelerating gear unit 222 to rotate when the rocking handle 100 is driven by external force; in the transmission connection direction of the first-stage accelerating gear unit 222 to the last-stage accelerating gear unit 223, the large gears of the former-stage accelerating gear units are sequentially meshed with the small gears of the latter-stage accelerating gear units; the rear gear 224 is meshed with the large gear of the last stage accelerating gear unit 223; the radius of the rear gear 224 is smaller than the large gear radius of the last stage accelerating gear unit 223.

According to the hand-operated power generation structure 10 provided by the utility model, the fastening component is arranged between the rocking handle 100 and the rotating shaft 210, so that when the rocking handle 100 drives the rotating shaft 210 to rotate, the relative rotation between the rocking handle 100 and the rotating shaft 210 in the circumferential direction is limited, on one hand, the rocking handle 100 is effectively prevented from falling off from the rotating shaft 210, and on the other hand, the rotating force received by the rocking handle 100 is transmitted to the rotating shaft 210 as much as possible, so that the labor is saved.

The science popularization science education tool provided by the utility model adopts the hand-operated power generation structure 10, namely, the hand-operated power generation structure 10 provides electric energy for the science principle display assembly 30, so that the science principle display assembly 30 operates to display the science principle, the interactivity between the science popularization science education tool and students is improved, and a better teaching effect is achieved.

The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. The scope of the utility model is to be determined by the appended claims.

Claims

1. The hand-operated power generation structure of the science and education appliance comprises a rocking handle, an acceleration transmission assembly and a generator, wherein the generator is provided with a motor shaft, the rocking handle is connected with the motor shaft of the generator through the acceleration transmission assembly, and the rocking handle can drive the motor shaft to rotate under the driving of external force;

2. The hand-operated power generation structure of the science and education appliance according to claim 1, wherein the rotating shaft is accommodated in the through hole;

the connecting column radially extends to form a limit flange, and the diameter of the limit flange is larger than that of the through hole, so that the limit flange is abutted to the edge of the end part of the through hole.

3. The hand-operated power generation structure of the science and education appliance according to claim 2, wherein the connection post comprises a first connection part, a second connection part and the limit flange which are sequentially connected along an axial direction of the connection post, and the first connection part is fastened and connected with the connection hole.

4. The hand-operated power generation structure of the science and education appliance according to claim 2, wherein the rocking handle comprises a connecting rod, a handle and rocking handle output ends, wherein the handle and the rocking handle output ends are arranged at two ends of the connecting rod, a mounting part is arranged on the connecting rod at a position corresponding to the rocking handle output ends, a mounting hole for mounting the rocking handle output ends is formed in the mounting part along the axial direction of the mounting part, one end of the rocking handle output end protrudes out of the mounting part, and the other end of the rocking handle output end is recessed in the mounting part to form a containing cavity;

5. The hand-operated power generation structure of the science and education tool according to claim 3, wherein the outer surface of the first connection part is provided with an external thread, the inner surface of the connection hole is provided with an internal thread, and the first connection part is fastened and connected with the connection hole through the external thread and the internal thread.

6. The hand-operated power generation structure of the science and education appliance according to claim 3, wherein the diameter of the first connection part is smaller than the diameter of the second connection part, and the diameter of the second connection part is smaller than the diameter of the limit flange.

7. The hand-operated power generation structure of the science and education appliance according to claim 1, wherein the rotating shaft is a D-shaped shaft, a radial hole is arranged at the output end of the rocking handle, and a radial connecting column is inserted into the radial hole to be abutted with the plane of the D-shaped shaft.

8. The hand-operated power generation structure of the science and education appliance according to claim 1, further comprising a gear box and a mounting seat, wherein one end of the rotating shaft and the accelerating gear assembly are arranged in the gear box, and the other end of the rotating shaft protrudes out of the gear box for mounting the rocking handle;

9. The utility model provides a science popularization science education apparatus, its characterized in that, include the casing, set up in scientific principle show subassembly and any of claims 1-8 on the casing the hand electricity generation structure of science popularization science education apparatus, scientific principle show subassembly includes the voltage stabilizing circuit who is connected with the motor output, the hand electricity generation structure of science popularization science education apparatus is operable in order to pass through motor output voltage extremely voltage stabilizing circuit, through voltage stabilizing circuit is for the operation of science principle show subassembly provides the electric energy.

10. The scientific and teaching appliance according to claim 9, further comprising a display screen and a control switch for controlling the display screen to be turned on, wherein the control switch is connected with the output end of the motor, and obtains a high-level signal according to the output voltage of the output end of the motor to control the display screen to be turned on.