Balance lever device for STEM education demonstration

Abstract

The utility model provides a balance lever device used for STEM education demonstration, comprising a cross arm assembly and a support assembly which are perpendicular to each other, the middle position of the cross arm assembly is rotatably connected with the support assembly, the top of the support assembly is provided with a dial, and the dial is rotatably connected with the cross arm assembly. A pointer with the top end close to the dial is arranged in the middle of the cross arm assembly, the supporting assembly is formed by detachably connecting a first branch end plastic plate and a first five-hole plastic plate, and the cross arm assembly is composed of a second five-hole plastic plate and second branch end plastic plates detachably installed at the two ends of the second five-hole plastic plate. And a tray is hung on the second branch end plastic plate. According to the utility model, the structure is simple, the purpose of lossless disassembly is realized, a traditional balance is effectively replaced, the situation that the precision is obviously reduced after disassembly and restoration is avoided, and the mutual structure and the function realization principle of the components of the balance can be clearly displayed to students.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching aid technical field especially is involved in a kind of balance lever device for STEM education demonstration. BACKGROUND

[0002] Currently, STEAM education is widely valued in the global scope, and the innovative thinking and practical ability of students are cultivated through interdisciplinary learning methods. In physics teaching, the principle of balance lever is an important knowledge point, but the traditional teaching method often focuses on theoretical explanation, lacks intuitive and interactive demonstration process, and most of the balances on the market are factory-assembled, which brings great convenience to the users, but from the aspect of teaching, such balance cannot enable learners to understand the problems that need to be paid attention to in the actual design process of balance, so that students cannot deeply understand the essence of the principle of lever in balance, and it is difficult to increase the students' desire to explore and learning depth.

[0003] The current balance is already very mature, especially in terms of high precision in electronic balance. However, in the education industry, most of the balances used are still traditional balances, and most of them are complete balance bodies, which cannot be disassembled without damage. After disassembly and restoration, the precision is obviously reduced, and the structure is complex, which cannot clearly show the students the mutual structure between the component parts and the realization principle of function, and it is difficult to disassemble and introduce the structural characteristics of the balance in detail. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a balance lever device for STEM education demonstration to solve the above technical problems.

[0005] The utility model provides a balance lever device for STEM education demonstration, which comprises a horizontal arm assembly and a supporting assembly arranged perpendicularly to each other, the middle position of the horizontal arm assembly is rotationally connected with the supporting assembly, the top of the supporting assembly is provided with a scale disc, the middle position of the horizontal arm assembly is provided with a pointer with its top end close to the scale disc, the supporting assembly is composed of a first split plastic plate and a first five-hole plastic plate which are detachably connected, the horizontal arm assembly is composed of a second five-hole plastic plate and a second split plastic plate which are detachably installed at both ends of the second five-hole plastic plate, and a tray is hung on the second split plastic plate.

[0006] Further, the first split plastic plate and the second split plastic plate are composed of a two-hole end and a four-hole end, and the plane where the two-hole end is located is perpendicular to the plane where the four-hole end is located.

[0007] Further, the four-hole end of the first split plastic plate is detachably connected with the first five-hole plastic plate, and the scale disc is installed on the top of the first five-hole plastic plate.

[0008] Further, the scale disc comprises a scale base plate installed on the top of the first five-hole plastic plate, and a scale sticker is pasted on the scale base plate.

[0009] Further, the two-hole end of the first split-end plastic plate is installed on the base assembly.

[0010] Further, the base assembly comprises a base and a first turning seat, the first turning seat is detachably installed on the base, and the two-hole end of the first split-end plastic plate is detachably connected with the first turning seat.

[0011] Further, the second split-end plastic plate is symmetrically installed on the second five-hole plastic plate, and the two-hole end of the second split-end plastic plate is detachably connected with the second five-hole plastic plate.

[0012] Further, the tray is hung on the four-hole end of the second split-end plastic plate.

[0013] Further, a second turning seat is installed at the middle position of the second five-hole plastic plate, and the second turning seat is rotationally connected with the first five-hole plastic plate through a rotating bolt.

[0014] Further, a support column sleeve is arranged on the rotating bolt between the first five-hole plastic plate and the second turning seat, the support column sleeve is fixedly connected with the second turning seat, and the pointer is installed on the top of the support column sleeve.

[0015] The utility model discloses simple structure, through setting up by the first split-end plastic plate and the first five-hole plastic plate detachably connected composition's support assembly and by the second five-hole plastic plate and the second split-end plastic plate detachably connected composition's cross arm assembly rotationally connected, realize the purpose of nondestructive disassembly, effectively replace traditional balance, avoid the obvious condition of the precision of disassembling and restoring, can clearly show the mutual structure between the constituent parts and the realization principle of function to the student. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0017] Figure 1 It is the structural schematic diagram of the utility model;

[0018] Figure 2It is the side view of the utility model;

[0019] Figure 3 It is the five-hole plastic plate structure diagram of the utility model;

[0020] Figure 4 It is the split-end plastic plate structure diagram of the utility model;

[0021] Mark explanation:

[0022] In the drawing: 11-first split-end plastic plate, 12-first five-hole plastic plate, 21-second split-end plastic plate, 22-second five-hole plastic plate, 31-two-hole end, 32-four-hole end, 4-dial, 5-pointer, 6-tray, 71-first steering seat, 72-base, 8-second steering seat, 9-supporting column sleeve; Specific implementation

[0023] The technical scheme of the utility model will be described below in conjunction with embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or position relationship shown in the drawing, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] Embodiment 1

[0027] As Figures 1-4 shown:

[0028] A balance lever device for STEM education demonstration, comprising a horizontal arm assembly and a support assembly arranged perpendicularly to each other, and the middle position of the horizontal arm assembly is rotationally connected with the support assembly.

[0029] The support assembly is composed of a first split-end plastic plate 11 and a first five-hole plastic plate 12, the first split-end plastic plate 11 is composed of a two-hole end 31 and a four-hole end 32, and the plane where the two-hole end 31 is located is perpendicular to the plane where the four-hole end 32 is located.

[0030] The four-hole end 32 of the first split-end plastic plate 11 is located above the two-hole end 31 and is detachably connected with the first five-hole plastic plate 12 through a screw and a nut.

[0031] A scale dial 4 is installed on the top of the first five-hole plastic plate 12, the scale dial 4 comprises a scale base installed on the top of the first five-hole plastic plate 12, and a scale sticker is pasted on the scale base.

[0032] The two-hole end 31 of the first split-end plastic plate 11 is installed on the base assembly.

[0033] The base assembly comprises a base 72 and a first steering seat 71, the first steering seat 71 is detachably installed on the base 72 through a nylon rivet, and the two-hole end 31 of the first split-end plastic plate 11 is detachably connected with the first steering seat 71 through a screw and a nut.

[0034] The horizontal arm assembly is composed of a second five-hole plastic plate 22 and two second split-end plastic plates 21 detachably installed on both ends of the second five-hole plastic plate 22, and the two second split-end plastic plates 21 are located at the same height.

[0035] The second split-end plastic plate 21 is composed of a two-hole end 31 and a four-hole end 32, and the plane where the two-hole end 31 is located is perpendicular to the plane where the four-hole end 32 is located.

[0036] The second split-end plastic plate 21 is symmetrically installed on the second five-hole plastic plate 22, and the two-hole end 31 of each of the two second split-end plastic plates 21 is detachably connected with the second five-hole plastic plate 22.

[0037] A tray 6 is hung on the second split-end plastic plate 21, and the tray 6 is hung on the four-hole end 32 of the second split-end plastic plate 21.

[0038] A second steering seat 8 is installed on the middle position of the second five-hole plastic plate 22, and the second steering seat 8 is rotationally connected with the first five-hole plastic plate 12 through a rotating bolt.

[0039] A support column sleeve 9 is arranged on the rotating bolt between the first five-hole plastic plate 12 and the second steering seat 8, the support column sleeve 9 is fixedly connected with the second steering seat 8, a vertical pointer 5 is installed on the support column sleeve 9, the top end of the pointer 5 is close to the dial 4, and the pointer 5 swings to point to different scales on the dial 4 with the left and right deflection of the horizontal arm assembly.

[0040] In use, first, the two-hole end 31 of the first split plastic plate 11 is installed on the first steering seat 71 through a screw and a nut, the first five-hole plastic plate 12 and the four-hole end 32 of the first split plastic plate 11 are connected through a screw and a nut to increase the length, the scale base is fixed on the top end of the first five-hole plastic plate 12 through a screw, the scale sticker is attached to the scale base, the first steering seat 71 is fixed to the base 72 through a nylon rivet, and the support assembly of the balance is assembled.

[0041] Secondly, the two-hole ends 31 of the two second split plastic plates 21 are respectively installed at the two ends of the second five-hole plastic plate 22, the second steering seat 8 is installed at the middle position of the top surface of the second five-hole plastic plate 22, and the horizontal arm assembly of the balance is assembled.

[0042] Then, the second steering seat 8 is connected with the first five-hole plastic plate 12 through a rotating bolt and is locked and fixed through a nut, the support column sleeve 9 is sleeved on the rotating bolt, the pointer 5 is sleeved on the support column sleeve 9, the support column sleeve 9 is fixedly connected with the second steering seat 8, the pointer 5 can swing through the support column sleeve 9 with the deflection of the horizontal arm assembly, and finally the tray 6 is hung at the four-hole end 32 of the second split plastic plate 21.

[0043] The utility model discloses simple structure has good stability and self -balancing, through setting up by the first split plastic plate and the first five-hole plastic plate detachable connection and by the second five-hole plastic plate and the second split plastic plate detachable connection and the horizontal arm assembly rotatory connection of connection, realize the purpose of nondestructive disassembly, effectively replace traditional balance, avoid the condition that precision drops obviously after disassembling and restoring, can clearly show the mutual structure between its component parts and the realization principle of function to student, satisfy the requirement of teaching to the flatness precision.

[0044] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A balance lever device for STEM education demonstrations, characterized in that... The device includes a crossarm assembly and a support assembly arranged perpendicularly to each other. The middle position of the crossarm assembly is rotatably connected to the support assembly. The top of the support assembly is provided with a dial. The middle position of the crossarm assembly is provided with a pointer whose top is close to the dial. The support assembly is composed of a first split-end plastic plate and a first five-hole plastic plate detachably connected together. The crossarm assembly is composed of a second five-hole plastic plate and a second split-end plastic plate detachably installed at both ends of the second five-hole plastic plate. A tray is suspended on the second split-end plastic plate.

2. The balance lever device for STEM education demonstrations according to claim 1, characterized in that, The first and second split-end plastic plates are composed of two-hole ends and four-hole ends connected together, and the plane where the two-hole ends are located is perpendicular to the plane where the four-hole ends are located.

3. The balance lever device for STEM education demonstrations according to claim 2, characterized in that, The four-hole end of the first split plastic plate is detachably connected to the first five-hole plastic plate, and the dial is installed on the top of the first five-hole plastic plate.

4. The balance lever device for STEM education demonstrations according to claim 3, characterized in that, The dial includes a scale base mounted on top of the first five-hole plastic plate, and scale stickers are affixed to the scale base.

5. The balance lever device for STEM education demonstration according to claim 3, characterized in that, The two holes of the first split plastic plate are mounted on the base assembly.

6. The balance lever device for STEM education demonstration according to claim 5, characterized in that, The base assembly includes a base and a first steering seat, the first steering seat being detachably mounted on the base, and the two holes of the first split-end plastic plate being detachably connected to the first steering seat.

7. The balance lever device for STEM education demonstration according to claim 2, characterized in that, The second split-end plastic plate is symmetrically mounted on the second five-hole plastic plate, and the two holes of the second split-end plastic plate are detachably connected to the second five-hole plastic plate.

8. The balance lever device for STEM education demonstration according to claim 7, characterized in that, The tray is suspended on the four-hole end of the second split plastic plate.

9. The balance lever device for STEM education demonstration according to claim 7, characterized in that, A second steering seat is installed at the middle position of the second five-hole plastic plate, and the second steering seat is rotatably connected to the first five-hole plastic plate by a rotating bolt.

10. The balance lever device for STEM education demonstration according to claim 9, characterized in that, A support sleeve is provided between the first five-hole plastic plate and the second steering seat, and the support sleeve is fixedly connected to the second steering seat. The pointer is installed on the top of the support sleeve.

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