CN204390554U - A kind of geometry teaching aid - Google Patents

Abstract

The utility model provides a geometric teaching aid, which comprises a blackboard, two support rods, two pistons, two bearings, two L-shaped rods, a cross bar, several magnetic puzzle boards and magnetic boards. The two support rods are placed horizontally, and an open guide rail groove and a plurality of positioning rods are arranged on the two support rods, and the two pistons are respectively arranged in the two open guide rail grooves. One end of the cross bar is fixed on a piston, and the other end of the cross bar is fixed on another piston. One end of each L-shaped bar parallel to the cross bar passes through an open guide rail groove and is connected with one side of a bearing, and the other side of the bearing is connected with a piston. One end of each L-shaped bar perpendicular to the cross bar is provided with a buckle engaged with the positioning bar. The upper edge of the blackboard is suspended on the crossbar, the two ends of the magnetic board are respectively fixed on two supporting rods, and several magnetic puzzle boards are adsorbed on the surface of the magnetic board. The utility model has the advantages of simple structure and convenient use, and unifies the explanation of knowledge points and the demonstration of geometric figures.

Description

a geometry teaching aid

technical field

The utility model relates to a teaching aid, in particular to a geometric teaching aid.

Background technique

When teaching geometry, teachers usually need to carry geometric boards of various shapes for demonstration in order to explain the knowledge points to be imparted to students more intuitively. The teacher completes the geometry demonstration process by fixing the geometry board on the blackboard by hand. However, this geometry board has some limitations. Teachers usually can only use this geometry board to demonstrate simple geometric figures. For some complex geometric figures, it is not easy to demonstrate with this geometry board. At present, the solution to this problem is to provide a magnetic device to demonstrate geometric figures, such as the magnetic activity jigsaw puzzle CN2367355Y disclosed in the patent literature. However, this type of magnetic device can only demonstrate geometric figures alone, but cannot achieve the effect of explaining geometric figures in comparison with knowledge points.

Utility model content

According to this defect of the current technology, the utility model aims to provide a geometric teaching aid which is simple in structure, easy to use, saves space, can demonstrate complex geometric figures, and unifies the explanation of knowledge points and the demonstration of geometric figures.

The utility model adopts the following technical solutions to solve the above-mentioned technical problems: a geometric teaching aid, including a bracket, a blackboard, and a magnetic jigsaw puzzle device. The support includes two support rods, two pistons, two bearings, two L-shaped rods and a cross bar. The two support rods are placed horizontally, and the two support rods are provided with an open rail groove and a plurality of positioning rods. One ends of the plurality of positioning rods are all fixed on the corresponding support rods. The other end of the positioning rod can be engaged with the L-shaped rod. The two pistons are respectively arranged in the two opening guide rail grooves. The two ends of the cross bar are respectively fixed on one side of the two pistons, and the other sides of the two pistons are respectively provided with two bearings. When the blackboard needs to be fixed, one end of each L-shaped bar parallel to the cross bar is installed in the two bearings respectively, and one end of each L-shaped bar perpendicular to the cross bar faces the The direction of the positioning rod is rotated and engaged with the positioning rod closest to the L-shaped rod. When the blackboard needs to be moved up and down, each L-shaped bar is taken out from the cross bar, and the movement of the blackboard is realized by moving the cross bar. The upper edge of the blackboard is suspended from the cross bar. The magnetic puzzle device includes several magnetic puzzle boards and magnetic boards, the two ends of the magnetic boards are respectively fixed on the two support rods, and the several magnetic puzzle boards are adsorbed on the surface of the magnetic boards.

Preferably: the number of positioning rods on the two supporting rods is equal.

Preferably: the positions of the two support rods are in a one-to-one horizontal correspondence.

Preferably: the thicknesses of the several magnetic puzzle boards are equal.

Preferably: the several magnetic puzzle boards have different shapes.

The utility model first describes the concept of geometric knowledge points to be taught on the blackboard, then moves the blackboard, staggers the positions of the blackboard and the magnetic board, and then selects a magnetic jigsaw board according to the content of the knowledge point, and then uses the selected magnetic jigsaw board in the Graphical demonstration on the surface of the magnetic board achieves the purpose of graphic demonstration while explaining geometric knowledge points. Simultaneously, the utility model can select the degree of staggering between the blackboard and the magnetic board according to the size of the graphics to be demonstrated.

The utility model has the advantages of simple structure, convenient use, space saving, demonstration of complex geometric figures, unification of explanation of knowledge points and demonstration of geometric figures, and is mainly used in the application field of geometric teaching aids.

Description of drawings

Fig. 1 is a structural diagram of a geometric teaching aid of the present invention.

Fig. 2 is a partial structural diagram of the geometry teaching aid in Fig. 1 .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in FIGS. 1-2 , the embodiment of the present invention provides a geometry teaching aid, which includes a bracket 1 , a blackboard 2 and a magnetic puzzle device 3 . The bracket 1 includes two support rods 11 , two pistons 12 , two bearings 13 , two L-shaped rods 14 and a cross bar 15 . The two support rods 11 are placed horizontally, and the two support rods 11 are provided with an open guide rail groove 111 and several positioning rods 112, and the two pistons 12 are respectively arranged in the two open guide rail grooves. 111 in. One end of the cross bar 15 is fixed on one piston 12 , and the other end is fixed on the other piston 12 . One end of each L-shaped bar 14 parallel to the cross bar 11 passes through an open rail groove 111 and is connected to one side of the bearing 13 , and the other side of the bearing 13 is connected to the piston 12 . One end of each L-shaped bar 14 perpendicular to the cross bar 15 is provided with a buckle 16 , and the end perpendicular to the cross bar 15 is engaged with the positioning rod 112 through the buckle 16 . The upper edge of the blackboard 2 is suspended on the cross bar 15 . The magnetic puzzle device 3 includes several magnetic puzzle boards 31 and magnetic boards 32 . The two ends of the magnetic board 32 are decibelly fixed on the two support rods 11 , and the several pieces of magnetic puzzle boards 31 are adsorbed on the surface of the magnetic board 32 .

The embodiment of the utility model describes the content of the geometric knowledge point to be explained on the blackboard 2, then determines the geometric figure required by the geometric knowledge point, then analyzes and demonstrates the required space of the geometric figure, and the L-shaped bar 14 One end parallel to the cross bar 15 is taken out from the bearing 13, and the blackboard 2 and the magnetic board 32 are staggered by moving the cross bar 15 upwards or downwards. When the degree of staggering between the blackboard 2 and the magnetic board 32 satisfies the required space for the demonstration, one end of the L-shaped bar 14 parallel to the cross bar 15 is installed in the bearing 13, and one end of the L-shaped bar 14 perpendicular to the cross bar 15 is positioned. The direction of the rod 14 is rotated, and it is engaged on the positioning rod 112 closest to the L-shaped rod 14, and then the magnetic puzzle board 31 is selected according to the demonstration needs, and the geometric figure demonstration is performed on the surface of the magnetic board 32 with the magnetic puzzle board 31 selected to realize The explanation of geometric knowledge points and the demonstration of geometric figures are unified.

The above descriptions are only preferred embodiments of the utility model creation, and are not intended to limit the utility model creation. Any modifications, equivalent replacements and improvements made within the spirit and principles of the utility model creation should be Included within the scope of protection created by the utility model.

Claims (5)

1. A geometric teaching aid is characterized in that: it comprises a support, a blackboard, and a magnetic jigsaw puzzle; the support comprises two support rods, two pistons, two bearings, two L-shaped bars and a cross bar; the two The support rods are placed horizontally, and the two support rods are provided with an open guide rail groove and a plurality of positioning rods. One end can be engaged with the L-shaped rod; the two pistons are respectively arranged in the two open rail grooves; the two ends of the cross bar are respectively fixed on one side of the two pistons, and the two pistons The other side of the block described piston is provided with two described bearings respectively; One end of each L-shaped bar is perpendicular to the horizontal bar and rotates in the direction facing the positioning bar respectively, and is engaged on the positioning bar closest to the L-shaped bar; when it is necessary to move the blackboard up and down , each L-shaped bar is taken out from the cross bar, and by moving the cross bar, the movement of the blackboard is realized; the upper edge of the blackboard is suspended on the cross bar; the magnetic puzzle device It includes several magnetic puzzle boards and magnetic boards, the two ends of the magnetic boards are respectively fixed on the two support rods, and the several magnetic puzzle boards are adsorbed on the surface of the magnetic boards. 2. A geometry teaching aid according to claim 1, characterized in that: the number of positioning rods on the two supporting rods is equal. 3. A geometry teaching aid according to claim 1, characterized in that: the positions of the two support rods are in a one-to-one horizontal correspondence. 4. A geometry teaching aid according to claim 1, characterized in that: said several magnetic puzzle boards have the same thickness. 5. A geometry teaching aid according to claim 1, characterized in that: said several magnetic jigsaw puzzles have different shapes.