CN211787767U

CN211787767U - Adjustable math teaching aid

Info

Publication number: CN211787767U
Application number: CN202020805253.7U
Authority: CN
Inventors: 仇梦婷; 高慧文
Original assignee: Huzhou University
Current assignee: Huzhou University
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-10-27
Anticipated expiration: 2030-05-13

Abstract

The utility model relates to the technical field of teaching aids, in particular to an adjustable mathematical teaching aid, which comprises a wheel disc, a hinge assembly and a central cylinder; the hinge assembly is arranged on one side of the wheel disc and comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod which are connected in sequence; a first rotating shaft is arranged between the first connecting rod and the second connecting rod, is fixedly arranged at the edge of the wheel disc and is simultaneously penetrated in the first connecting rod and the second connecting rod; a second rotating shaft is arranged between the third connecting rod and the fourth connecting rod, and the second rotating shaft is inserted into the central cylinder and simultaneously penetrates through the first connecting rod and the second connecting rod; a sliding groove is axially formed in each of the first connecting rod and the second connecting rod, and a sliding block capable of axially sliding in the sliding groove is arranged on each of the third connecting rod and the fourth connecting rod. The utility model discloses can be clear audio-visual demonstrate multiple relations such as circumferential angle, central angle, circle external angle, possess simple structure, the quick characteristics of easy operation.

Description

Adjustable math teaching aid

Technical Field

The utility model relates to a teaching aid technical field, concretely relates to mathematics teaching aid with adjustable.

Background

Mathematics is a subject of researching concepts such as quantity, structure, change, space, information and the like, and in the teaching of mathematics in middle school, some basic theorems are involved, such as the circumferential angle subtended by an arc is equal to half of the central angle subtended by the arc, the circumferential angle subtended by a diameter is a right angle, the relation of inner and outer angles of a circle and the like, in general, teachers use the arc as an axiom, and require students to remember hard backs and not demonstrate the arc; or the formula is used for derivation and explanation, the whole process is abstract and fussy, so that students cannot easily understand and remember the formula, and the formula is not beneficial to exerting the subjectivity of the students to a certain extent.

At present, teachers can demonstrate the relation between the internal circular angles only through hand drawing, or a geometric method is used for proving, the whole teaching process is complicated, and students are difficult to understand. Therefore, there is a great need for an intuitively adjustable mathematical teaching aid to assist students in understanding and remembering.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mathematics teaching aid with adjustable, demonstration that can be clear direct-looking can vividly explain multiple relations such as circumference angle, central angle, circle external angle to help student's understanding and memory.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

an adjustable mathematics teaching aid comprises a wheel disc, a hinge assembly and a central cylinder; the central cylinder is arranged at the circle center of the wheel disc; the hinge assembly is arranged on one side of the wheel disc and comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod which are sequentially connected; a first rotating shaft is arranged between the first connecting rod and the second connecting rod, is fixedly arranged at the edge of the wheel disc and is simultaneously penetrated in the first connecting rod and the second connecting rod; a second rotating shaft is arranged between the third connecting rod and the fourth connecting rod, and the second rotating shaft is inserted into the central cylinder and simultaneously penetrates through the first connecting rod and the second connecting rod; a sliding groove is axially formed in each of the first connecting rod and the second connecting rod, and a sliding block capable of axially sliding in the sliding groove is arranged on each of the third connecting rod and the fourth connecting rod.

Through adopting above-mentioned technical scheme, the mathematics teaching aid of this application is when using, and the rim plate provides a circular shape benchmark as circular base for articulated subassembly. If show circumference angle or central angle, the edge department that articulated subassembly was fixed in the rim plate through first pivot and uses first pivot as the centre of a circle to rotate, the slider axial slides in the spout makes third connecting rod and second connecting rod and fourth connecting rod be swing joint with being connected of first connecting rod, on the other hand the other end of third connecting rod and second connecting rod is fixed in the centre of a circle of disc through the second pivot and uses the second pivot as the centre of a circle to rotate, only need stir any part in this teacher's use articulated subassembly, just can clearly audio-visual demonstrate the relation between circumference angle or the central angle. If show external round angle, only need lift first pivot from the rim plate off, drag first pivot to keeping away from the centre of a circle direction afterwards, keep first pivot to wear to locate in head rod and the second connecting rod simultaneously this moment, and then clear audio-visual demonstrates the relation of external round angle.

From this, this application can be played some simple mathematics theorems, has got rid of the teaching mode of traditional memorandum hardback to deepen student's impression, increase the interest in learning, this kind of mathematical knowledge that changes the abstract is the mode of playing for the board of concrete visual model, convenient operation. From the perspective of students, the teaching device can take the field of vision of all students in class into consideration, and improves the teaching effect. On the teaching content, the mathematics knowledge point that mathematics teaching aid can cover extensive detailed, can vividly explain multiple relations such as circumference angle, central angle, outer angle of circle to help student's understanding and memory.

The utility model discloses further set up to: the magnetic blackboard is characterized in that a plurality of first magnetic sheets attracted with the magnetic blackboard are respectively arranged at the edges of the disc surfaces at the two sides of the wheel disc, and second magnetic sheets attracted with the first magnetic sheets are arranged on one sides, facing the wheel disc, of the third connecting rod and the fourth connecting rod.

Through adopting above-mentioned technical scheme, when needs fix the angle of fillet, first magnetic sheet and second magnetic sheet actuation, and then with firm the adsorbing on the rim plate of third connecting rod and fourth connecting rod, realize the location of third connecting rod and fourth connecting rod. With this simultaneously, first magnetic sheet can also the actuation on the magnetism blackboard, need not the teacher and holds in the palm the mathematics teaching aid always with the hand or instrument, still makes things convenient for the teacher to the regulation of interior angle when being convenient for the student to watch. The magnetic sheet attracting mode is convenient to operate, time consumption of teachers in the process of adjusting the inner circular angles is saved, and teaching efficiency is improved.

The utility model discloses further set up to: and the wheel disc is provided with a mounting groove for embedding the first magnetic sheet.

The utility model discloses further set up to: the first magnetic sheet is arc-shaped, and a circular ring is formed on the wheel disc after splicing.

Through adopting above-mentioned technical scheme, first magnetic sheet embedding is in the mounting groove to this reduces the possibility that third connecting rod and fourth connecting rod take place wearing and tearing when the rotation is stirred. The first magnetic sheet with the circular arc shape enables the suction position of the second magnetic sheet to be changed at will, and further the angle change of the inner circular angle is increased.

The utility model discloses further set up to: the wheel disc is a disc formed by splicing four frames, the frames are quarter-circle fan-shaped frames, and a plurality of clamping blocks and clamping holes are arranged on the frames at intervals along the radius; when the wheel disc is spliced, the clamping block of one frame is correspondingly clamped in the clamping hole of the frame adjacent to the clamping block.

The utility model discloses further set up to: the frame is provided with an avoiding groove at the radius parts of the two sides of the frame respectively, and the frame forms a flanging at the avoiding groove; when the frames are spliced, the frames are reversely placed between the two adjacent frames, and the turnup is clamped in the avoiding groove.

The utility model discloses further set up to: a plurality of bumps are arranged on the surface of one side of the frame, and a plurality of grooves are formed in the other side of the frame; when the wheel disc is folded, the frames are overlapped in sequence, and the convex blocks are clamped in the grooves.

Through adopting above-mentioned technical scheme, the rim plate is formed by four frame concatenations to this is convenient for dismantle the mathematics teaching aid, makes things convenient for teacher's hand-carry. Wherein, it can make the rim plate roughness that the frame concatenation formed better to dodge groove and turn-ups, and then improves the demonstration effect of mathematics teaching aid.

To sum up, the utility model discloses a beneficial technological effect does:

1. the mathematical education tool can clearly and visually demonstrate various relations such as a circumferential angle, a central angle, an external angle and the like, and has the characteristics of simple structure and simple and quick operation, thereby helping students to understand and memorize;

2. in the mathematics teaching aid of this application, the rim plate can splice the dismantlement, is convenient for dismantle the mathematics teaching aid from this, makes things convenient for teacher's hand-carrying.

3. The utility model provides a mathematics teaching aid makes the rim plate can inhale on the magnetism blackboard through the setting of third magnetic sheet, still makes things convenient for the teacher to the regulation of interior angle of circle when being convenient for the student to watch.

Drawings

FIG. 1 is a schematic diagram of a mathematical teaching aid;

FIG. 2 is a schematic diagram of an explosive structure of a mathematical teaching aid;

FIG. 3 is a schematic diagram of an exploded view of the mathematical teaching aid, shown in an opposite orientation to FIG. 2;

fig. 4 is a cross-sectional view of the mathematical teaching aid at the projection and groove.

In the figure, 1, a wheel disc; 11. a frame; 111. a clamping block; 112. a clamping hole; 113. an avoidance groove; 114. flanging; 115. a bump; 116. a groove; 12. a shaft hole; 2. a hinge assembly; 21. a first connecting rod; 22. a second connecting rod; 23. a third connecting rod; 24. a fourth connecting rod; 25. a chute; 26. a slider; 3. a central barrel; 4. a first rotating shaft; 5. a second rotating shaft; 6. an end cap; 7. a first magnetic sheet; 8. a second magnetic sheet; 9. and (4) mounting the groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses an adjustable mathematics teaching aid, including rim plate 1, hinge assembly 2 and a center section of thick bamboo 3. Wherein, the central cylinder 3 is arranged at the center of the wheel disc 1; the hinge assembly 2 is installed at one side of the wheel disc 1 and comprises a first connecting rod 21, a second connecting rod 22, a third connecting rod 23 and a fourth connecting rod 24 which are connected in sequence.

A first rotating shaft 4 is installed between the first connecting rod 21 and the second connecting rod 22, and the first rotating shaft 4 is fixedly installed on the edge of the wheel disc 1 and penetrates through the first connecting rod 21 and the second connecting rod 22. A second rotating shaft 5 is installed between the third connecting rod 23 and the fourth connecting rod 24, and the second rotating shaft 5 is inserted into the central cylinder 3 and simultaneously passes through the first connecting rod 21 and the second connecting rod 22. The first rotating shaft 4 and the second rotating shaft 5 are threaded screws with threaded ends, and the first rotating shaft 4 is in threaded connection with an end cover 6, so that the first connecting rod 21 and the second connecting rod 22 are axially limited. The second rotating shaft 5 is threaded through the central cylinder 3, and further axially limits the third connecting rod 23 and the fourth connecting rod 24.

The first connecting rod 21 and the second connecting rod 22 are axially provided with a sliding groove 25, and the opening and the groove bottom of the sliding groove 25 respectively penetrate through two opposite sides of the first connecting rod 21 or the second connecting rod 22. The third connecting rod 23 and the fourth connecting rod 24 are respectively provided with a cylindrical sliding block 26 at one end far away from the second rotating shaft 5, and the sliding blocks 26 are embedded in the sliding grooves 25 and can axially slide in the sliding grooves 25.

Referring to fig. 3, four first magnetic sheets 7 attracted to the magnetic blackboard are respectively bonded to the disc surfaces on the two sides of the wheel disc 1 at the edges, the first magnetic sheets 7 are arc-shaped, and a circular ring is formed on the wheel disc 1 after the first magnetic sheets 7 are spliced. One side of the third connecting rod 23 and one side of the fourth connecting rod 24 facing the wheel disc 1 are bonded with a second magnetic sheet 8 which is attracted with the first magnetic sheet 7. Therefore, when the first magnetic sheet 7 and the second magnetic sheet 8 are attracted, the attraction position of the second magnetic sheet 8 can be changed at will, and the change of the angle of the inner circular angle is increased. In addition, the wheel disc 1 is correspondingly provided with four mounting grooves 9 for embedding the first magnetic sheets 7, and the four mounting grooves 9 are also in a circular ring shape after being spliced.

When the angle of the round inner angle needs to be fixed, the first magnetic sheet 7 and the second magnetic sheet 8 are attracted, so that the third connecting rod 23 and the fourth connecting rod 24 are firmly adsorbed on the wheel disc 1, and the third connecting rod 23 and the fourth connecting rod 24 are positioned. With this while, first magnetic sheet 7 can also the actuation on the magnetism blackboard, need not the teacher and holds in the palm the mathematics teaching aid always with the hand or instrument, still makes things convenient for the teacher to the regulation of interior angle when being convenient for the student to watch.

Referring to fig. 1 and 4, the wheel disc 1 is in a circular plate shape and is a circular disc formed by splicing four frames 11 made of plastic materials, and the four circular arc magnetic sheets of the first magnetic sheet 7 correspond to the circular disc 11 one by one. Each frame 11 is a quarter-circle fan-shaped frame, a plurality of spherical clamping blocks 111 and clamping holes 112 are arranged on the frames 11 at intervals along the radius, and a shaft hole 12 for the central cylinder 3 to penetrate is formed in the center of a circle after the four frames 11 are spliced. When the wheel disc 1 is spliced, the central cylinder 3 penetrates through the shaft hole 12 from bottom to top, and the clamping block 111 on each frame 11 is correspondingly clamped in the clamping hole 112 of the adjacent frame 11, so that the frames 11 are clamped and fixed.

The frame 11 is provided with an avoiding groove 113 at the radius of the two sides, the frame 11 forms a flange 114 at the avoiding groove 113, and the clamping block 111 and the clamping hole 112 are arranged on the flange 114. When the frames 11 are spliced, the two adjacent frames 11 are reversely placed, and the turned-over edge 114 is clamped in the avoiding groove 113, so that an annular disc 11 is formed.

A plurality of bumps 115 are arranged on one side of the frame 11, and a plurality of grooves 116 are arranged on the other side of the frame 11; when the wheel disc 1 is folded, the frames 11 are sequentially overlapped, and the convex block 115 is clamped in the groove 116, so that the mathematical teaching aid is convenient to store and carry.

The implementation principle of the embodiment is as follows:

the utility model provides a mathematics teaching aid is when using, and rim plate 1 provides a circular shape benchmark for hinge assembly 2 as circular base. If the circumference angle or the center angle is displayed, one end of the first connecting rod 21 and one end of the second connecting rod 22 in the hinge assembly 2 are fixed at the edge of the wheel disc 1 through the first rotating shaft 4 and rotate by taking the first rotating shaft 4 as the center of a circle, the sliding block 26 slides in the sliding groove 25 in the axial direction to enable the third connecting rod 23 and the second connecting rod 22 and the fourth connecting rod 24 to be movably connected with the first connecting rod 21, and on the other hand, the other end of the third connecting rod 23 and the other end of the second connecting rod 22 are fixed at the center of a circle of the disc 11 through the second rotating shaft 5 and rotate by taking the second rotating shaft 5 as the center of a circle, so that a teacher only needs to stir any one part in the hinge assembly 2 when using the teaching aid to clearly and visually demonstrate the relationship between the circumference angle or. If show external angle, only need lift first pivot 4 off from rim plate 1, drag first pivot 4 to keeping away from the centre of a circle direction afterwards, keep first pivot 4 to wear to locate in head rod 21 and second connecting rod 22 simultaneously this moment, and then clear audio-visual demonstrate the relation of external angle.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. An adjustable mathematics teaching aid is characterized by comprising a wheel disc (1), a hinge assembly (2) and a central cylinder (3); the central cylinder (3) is arranged at the circle center of the wheel disc (1); the hinge assembly (2) is arranged on one side of the wheel disc (1) and comprises a first connecting rod (21), a second connecting rod (22), a third connecting rod (23) and a fourth connecting rod (24) which are sequentially connected; a first rotating shaft (4) is arranged between the first connecting rod (21) and the second connecting rod (22), and the first rotating shaft (4) is fixedly arranged at the edge of the wheel disc (1) and penetrates through the first connecting rod (21) and the second connecting rod (22) at the same time; a second rotating shaft (5) is arranged between the third connecting rod (23) and the fourth connecting rod (24), and the second rotating shaft (5) is inserted into the central cylinder (3) and simultaneously penetrates through the first connecting rod (21) and the second connecting rod (22); a sliding groove (25) is axially formed in each of the first connecting rod (21) and the second connecting rod (22), and a sliding block (26) capable of axially sliding in the sliding groove (25) is arranged on each of the third connecting rod (23) and the fourth connecting rod (24).

2. The adjustable mathematics teaching aid of claim 1, characterized in that, the both sides quotation of rim plate (1) is provided with a plurality of first magnetic sheets (7) with the attraction of magnetism blackboard respectively in border department, third connecting rod (23) and fourth connecting rod (24) are provided with second magnetic sheet (8) with first magnetic sheet (7) actuation towards one side of rim plate (1).

3. An adjustable teaching aid for mathematics as claimed in claim 2, wherein the wheel disc (1) is provided with an installation slot (9) for the first magnetic sheet (7) to be inserted into.

4. An adjustable teaching aid according to claim 2, wherein the first magnetic sheet (7) is arc-shaped and forms a ring on the wheel disc (1) after being spliced.

5. The adjustable math teaching aid of claim 1, wherein the wheel disc (1) is a disc formed by splicing four frames (11), the frames (11) are fan-shaped frames of a quarter circle, and a plurality of clamping blocks (111) and clamping holes (112) are arranged on the frames (11) at intervals along the radius; when the wheel disc (1) is spliced, the clamping block (111) of one frame (11) is correspondingly clamped in the clamping hole (112) of the frame (11) adjacent to the clamping block.

6. The adjustable math teaching aid of claim 5, wherein the frame (11) is provided with an avoiding groove (113) at the radius of each side, and the frame (11) forms a flanging (114) at the avoiding groove (113); when the frames (11) are spliced, the two adjacent frames (11) are placed in the reverse direction, and the flanging (114) is clamped in the avoiding groove (113).

7. The adjustable math teaching aid of claim 5, wherein a plurality of convex blocks (115) are arranged on one side plate surface of the frame (11), and a plurality of grooves (116) are arranged on the other side of the frame (11); when the wheel disc (1) is folded, the frames (11) are overlapped in sequence, and the convex blocks (115) are clamped in the grooves (116).