CN214541246U

CN214541246U - Teaching demonstration device

Info

Publication number: CN214541246U
Application number: CN202023322243.7U
Authority: CN
Inventors: 曾艳红; 傅桂平; 习羽; 傅小华; 刘勇刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-10-29
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to the technical field of mathematical education, in particular to a teaching demonstration device, which comprises fixed blocks and fixed grooves, wherein the fixed grooves are arranged at the top parts of the fixed blocks, the front sides of the inner bottoms of the fixed grooves are movably connected with a first ruler, the rear sides of the inner bottoms of the fixed grooves are movably connected with a second ruler, the teaching demonstration device is provided with four fixed blocks, the inner parts of each fixed block are respectively provided with the first ruler and the second ruler, two adjacent fixed blocks are movably connected through a bearing between the first ruler and the second ruler, and the included angle between the two adjacent fixed blocks can be flexibly adjusted, so that the graph enclosed by the four fixed blocks can be changed into a graph such as a square, a rectangle, a parallelogram, a rhombus and the like, through material object demonstration, the mode that a student can only observe the graph on a blackboard is changed, and the student can observe more deeply, and a better teaching effect is achieved.

Description

Teaching demonstration device

Technical Field

The utility model relates to a teaching field specifically is a teaching presentation device.

Background

Geometry is a discipline for studying spatial structure and properties, and common geometric figures are: the teaching aid is characterized in that the teaching aid comprises a square, a quadrangle, a parallelogram, a rhombus and the like, in geometric teaching, the space imagination and the logic imagination of most students are lack of exercise, thinking often still stays in simple graphs, in the teaching process, a teacher often draws a picture on a blackboard by means of a ruler and chalk to explain the students, but the students still cannot understand the picture due to the insufficient space imagination, and therefore, in order to more intuitively help the students to understand geometric bodies, a demonstration device is needed to help the students to quickly understand and master the knowledge of geometric graphs, and the learning efficiency is improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a teaching presentation device to be difficult to the problem of demonstrating the correlation between the geometric figure in the mathematical geometry teaching who proposes in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a teaching presentation device, including fixed block and fixed slot, the fixed slot has been seted up at the top of fixed block, the sliding connection has ruler one before the inside bottom of fixed slot, the sliding connection has ruler two behind the inside bottom of fixed slot, the inside left side embedding of fixed slot is provided with pivot one, the nested gear that is provided with of outside front end of pivot one, the inside right side embedding of fixed slot is provided with pivot two, the nested gear that is provided with of outside rear end of pivot two, the inside top of fixed slot is provided with two gear three that use the perpendicular bisector of fixed slot to set up as the axial symmetry, the positive intermediate position of fixed block is provided with spacing post, the nested rubber band that is provided with in the outside of spacing post.

Preferably, the fixed block is provided with four altogether, four the fixed block includes four ruler one and four ruler two, the inside ruler one of them fixed block passes through bearing fixedly connected with another the inside ruler two of fixed block.

Preferably, racks are arranged on one sides, close to the opening of the fixed groove, of the first ruler and the second ruler, the racks on the first ruler are meshed with the first gear, and the racks on the second ruler are meshed with the second gear.

Preferably, the first gear is meshed with a gear on the left side of the fixed groove perpendicular bisector in three phases, the second gear is meshed with a gear on the right side of the fixed groove perpendicular bisector in three phases, and the two third gears are meshed with each other.

Preferably, rubber bands are arranged between every two adjacent fixing blocks.

Compared with the prior art, the beneficial effects of the utility model are that:

this kind of teaching presentation device, through being provided with the fixed block, the fixed block is provided with four, the inside of every fixed block all is provided with ruler one and ruler two, bearing swing joint between two adjacent fixed blocks through ruler one and ruler two, contained angle between two adjacent fixed blocks can be adjusted in a flexible way, consequently, figures such as the figure that four fixed blocks enclose can be changed into the square, the rectangle, the parallelogram, rhombus, through the demonstration in kind, the mode that the student can only observe the figure on the blackboard in the past has been changed, the student can be more deep observation, reach better teaching effect. The device can be used for demonstrating 'four-side-row' in the middle point, namely, a figure formed by four rubber bands is a parallelogram, and a special shape can be a square, a rectangle or a rhombus.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a right side view of the overall structure of the present invention;

FIG. 3 is a schematic view of a partial structure of the fixing block of the present invention;

fig. 4 is an enlarged schematic structural diagram of a in fig. 3 according to the present invention.

In the figure: the fixing block comprises a fixing block 1, a fixing groove 101, a first rotating shaft 102, a first gear 103, a second rotating shaft 104, a second gear 105, a third gear 106, a limiting column 107, a first ruler 2, a second ruler 3 and a rubber band 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a teaching presentation device, including fixed block 1 and fixed slot 101, fixed slot 101 has been seted up at the top of fixed block 1, the inside bottom front side sliding connection of fixed slot 101 has ruler one 2, sliding connection has ruler two 3 behind the inside bottom of fixed slot 101, the inside left side embedding of fixed slot 101 is provided with pivot one 102, the nested gear that is provided with of the outside front end of pivot one 102 103, the inside right side embedding of fixed slot 101 is provided with pivot two 104, the nested gear two 105 that is provided with of the outside rear end of pivot two 104, the inside top of fixed slot 101 is provided with two gear three 106 that use the plumb line of fixed slot 101 as the axial symmetry setting, the positive intermediate position of fixed block 1 is provided with spacing post 107, the nested rubber band 4 that is provided with in the outside of spacing post 107.

Further, fixed block 1 is provided with four altogether, four fixed blocks 1 include four ruler one 2 and four ruler two 3, one of them ruler two 3 inside 1 of fixed block of 1 is connected with another ruler two of 1 inside of fixed block through bearing fixedly, through the pivot between ruler one 2 and the ruler two 3, contained angle between two adjacent fixed blocks 1 can be adjusted in a flexible way, consequently make the figure that four fixed blocks 1 enclose to change into the square, the rectangle, parallelogram, rhombus etc. figure, through the demonstration in kind, the mode that the student can only observe the figure on the blackboard in the past has been changed, the observation that the student can be more deep, reach better teaching effect.

Furthermore, racks are arranged on one sides, close to the opening of the fixing groove 101, of the first ruler 2 and the second ruler 3, the racks on the first ruler 2 are meshed with the first gear 103, and the racks on the second ruler 3 are meshed with the second gear 105.

Further, gear 103 meshes with the left gear three 106 of fixed slot 101 perpendicular bisector mutually, and gear 105 meshes with the gear three 106 on fixed slot 101 perpendicular bisector right side mutually, and two gears three 106 intermeshing, when the teacher to keeping away from fixed block 1 orientation pulling ruler 2, closely laminate with it and keep away from fixed block 1 in fixed slot 102 inside ruler two 3 simultaneously, otherwise then be close to fixed block 1 simultaneously, teacher's operation is simpler and convenient.

Furthermore, rubber bands are arranged between two adjacent fixed blocks 1, when the first ruler 2 and the second ruler 3 are used as a straight line, the limiting column 107 on the perpendicular bisector of the fixed blocks 1 is a middle point on the straight line, the rubber bands are connecting lines between points, the patterns formed by the points and the connecting lines can change along with the change of the included angle between the adjacent fixed blocks 1, the patterns such as squares, rectangles, parallelograms, rhombuses, quadrangles and the like can be presented, and students can better understand knowledge in geometry.

The working principle is as follows: firstly, the teacher is according to the teaching needs, take out the device is whole, according to required figure, adjust the contained angle size between the fixed block 1, then, contained angle between two adjacent fixed blocks 1 is when 90 degrees, show the figure of square, simultaneously, along with the change of contained angle, the figure that exhibits changes thereupon, then, the teacher stimulates ruler one 2 to the direction of keeping away from fixed block 1, gear one 103 drives gear three 106 and rotates, make it closely laminate and keep away from fixed block 1 in two 3 rulers of fixed slot 102 inside simultaneously, make the figure enlarge, be convenient for the student observes, finally, the teacher cup joints rubber band 4 on two adjacent spacing posts 107, further deepen the understanding of student to the relation between the plane geometry figure.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a teaching presentation device, includes fixed block (1) and fixed slot (101), its characterized in that: fixed slot (101) have been seted up at the top of fixed block (1), the inside bottom front side sliding connection of fixed slot (101) has ruler one (2), the inside bottom rear side sliding connection of fixed slot (101) has ruler two (3), the inside left side embedding of fixed slot (101) is provided with pivot one (102), the outside front end nestification of pivot one (102) is provided with gear one (103), the inside right side embedding of fixed slot (101) is provided with pivot two (104), the outside rear end nestification of pivot two (104) is provided with gear two (105), the inside top of fixed slot (101) is provided with two gear three (106) that use the plumb line of fixed slot (101) as the axisymmetric setting, the positive intermediate position of fixed block (1) is provided with spacing post (107), the outside nestification of spacing post (107) is provided with rubber band (4).

2. An instructional presentation device according to claim 1, wherein: the fixing block (1) is provided with four, four altogether the fixing block (1) includes four ruler one (2) and four ruler two (3), one of them ruler one (2) of fixed block (1) inside is through bearing fixedly connected with another ruler two (3) of fixed block (1) inside.

3. An educational presentation apparatus as claimed in any one of claims 1 or 2, wherein: scale marks distributed at equal intervals are marked on the outer sides of the first ruler (2) and the second ruler (3).

4. An instructional presentation device according to claim 1, wherein: one side of the first ruler (2) and one side of the second ruler (3) close to the opening of the fixing groove (101) are provided with racks, the racks on the first ruler (2) are meshed with the first gear (103), and the racks on the second ruler (3) are meshed with the second gear (105).

5. An educational presentation apparatus as claimed in any one of claims 1 or 4, wherein: the first gear (103) is meshed with a third gear (106) on the left side of a perpendicular bisector of the fixing groove (101), the second gear (105) is meshed with a third gear (106) on the right side of the perpendicular bisector of the fixing groove (101), and the two third gears (106) are meshed with each other.

6. An instructional presentation device according to claim 1, wherein: rubber bands are arranged between every two adjacent fixing blocks (1).