CN206411949U - A kind of Mathematical Limited Teaching apparatus - Google Patents

Abstract

The invention discloses a novel mathematics extreme teaching appliance, which relates to a teaching appliance. There are two slide slots on the front facade of the magnetic display board. Coordinate grid lines are drawn on the lower left corner of the front facade of the magnetic display board. There are extreme value marking magnetic blocks attached to the coordinate grid lines. Three grid panels Set on the upper right quarter of the front facade of the magnetic display panel, the three grid panels slide through a pair of magnetic sliders 1, a pair of magnetic sliders 2, a pair of magnetic sliders 3 and two chutes respectively Connection, the upper left quarter of the front facade of the magnetic display board and the lower right quarter of the board are respectively adsorbed with a magnetic writing board. Connected in the circular groove, the other end of the telescopic rod is vertically fixed on the base plate. It can assist teachers to effectively explain limit problems, simulate the form of gradually approaching extreme values, and enable students to understand the knowledge of mathematical limits more clearly.

Description

A new type of teaching tool for extreme mathematics

technical field

The utility model relates to a teaching appliance, in particular to a novel mathematics limit teaching appliance.

Background technique

Limit is a basic concept in advanced mathematics calculus. It refers to such a change trend and the approaching value (extreme value) of a variable that is gradually stable in general during a certain change process. The concept of limit is highly abstract, and it is difficult for students to accept the teacher's single explanation through words.

Contents of the invention

The purpose of this utility model is to provide a new type of mathematics limit teaching tool, which can assist teachers to effectively explain the limit problem, simulate the form gradually approaching the limit value, and make students understand the knowledge of the limit of mathematics more clearly.

To achieve the above object, the utility model adopts the following technical solutions: a novel mathematics limit teaching tool, including a magnetic display board, an extreme value marking magnetic block, a telescopic rod, a base plate, two magnetic writing boards and three grid boards. The magnetic display board is a square vertical board. There are two chutes on the front facade of the magnetic display board. Coordinate grid lines are drawn on one-third of the board surface, and extreme value marking magnetic blocks are adsorbed on the coordinate grid lines. Each grid board is composed of a grid board body and is fixed in front of the grid board body. The L-shaped frame in the lower left corner of the facade is composed of three grid panels. The grid panel bodies are arranged in sequence from front to back at the upper right quarter of the front facade of the magnetic display panel. The grid on the rear side The plate is slidingly connected to the two chute through a pair of magnetic sliders 1, the grid plate in the middle is slidably connected to the two chute through a pair of magnetic slider 2, and the grid plate on the front side is connected through a pair of magnetic sliders Three and two chute sliding connections, the upper left quarter of the front facade of the magnetic display board and the lower right quarter of the board are respectively adsorbed with a magnetic writing board, and the middle of the lower end of the magnetic display board is provided with a round concave slot, one end of the telescopic rod is mated and plugged into the circular groove, and the other end of the telescopic rod is vertically fixed on the bottom plate.

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

1. The utility model facilitates students to understand the knowledge of mathematical limits more clearly by simulating the form of gradually approaching the extreme value;

2. The utility model can be placed and used, and the magnetic display board can also be removed and hung in a suitable position for use, and it is easy to move.

Description of drawings

Fig. 1 is the axonometric view of the overall structure of the novel mathematics limit teaching apparatus of the present utility model;

Fig. 2 is the split structural axonometric view of the novel mathematics limit teaching appliance of the present utility model;

Fig. 3 is an enlarged view of part A of Fig. 2;

Fig. 4 is a schematic diagram of the assembly structure of the three grid panels and the magnetic display panels of the present invention.

detailed description

The technical solution in the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the utility model embodiment. Obviously, the described embodiment is only a part of the utility model embodiment, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1 to 4, the utility model discloses a novel mathematics limit teaching tool, including a magnetic display board 1, an extreme value marking magnetic block 4, a telescopic rod 5, a bottom plate 6, two magnetic writing boards 3, three Grid plate 2 and four rollers 7, the magnetic display board 1 is a square vertical board, a hanging ring is installed on the rear facade of the magnetic display board 1, and a frame 1-3 is fixed around the magnetic display board 1, and the frame 1- 3 The front facade of the magnetic display board 1 protrudes, and the front facade of the magnetic display board 1 is provided with two chute 1-1. The two chute 1-1 are opened from the lower left corner to the upper right corner of the magnetic display board 1 and mutually Arranged in parallel, coordinate grid lines 1-2 are drawn on the lower left corner of the front facade of the magnetic display board 1, and the magnetic blocks 4 with extreme value marks are attached to the coordinate grid lines 1-2. The grid panels 2 described above are all composed of a grid panel body 2-1 and an L-shaped frame 2-2 fixed to the lower left corner of the front facade of the grid panel body 2-1. The grid panel bodies of the three grid panels 2 2-1 is arranged in sequence from front to back on the upper right quarter of the front facade of the magnetic display panel 1, and the grid panel 2 on the rear side passes through a pair of magnetic sliders 2-3 and two sliders. Slot 1-1 is slidingly connected, grid plate 2 in the middle is slidingly connected with two slide grooves 1-1 through a pair of magnetic sliders 2-4, and grid plate 2 on the front side is connected through a pair of magnetic sliders 3 2-5 is slidingly connected with two chute 1-1, the grid plate 2 on the front side, the grid plate 2 in the middle, the grid plate 2 on the rear side and the coordinate grid line 1-2 The grid size of the magnetic display board 1 is gradually reduced, and a magnetic writing board 3 is adsorbed on the upper left quarter of the front facade of the magnetic display board 1 and the lower right quarter of the board respectively. The two magnetic writing boards 3 and The corresponding positions of the frame 1-3 are hinged, a circular groove is provided at the middle position of the lower end surface of the magnetic display board 1, one end of the telescopic rod 5 is matched and inserted in the circular groove, and the other end of the telescopic rod 5 is vertical Fixed on the bottom plate 6, four rollers 7 are installed on the lower surface of the bottom plate 6, and the four rollers 7 are arranged in a rectangular shape.

When using the utility model, the teacher can draw the limit curve on the coordinate grid lines 1-2 of the magnetic display board 1 in advance, and attach the extreme value marking magnetic block 4 to the extreme point of the limit curve, and open the two magnetic writing Plate 3, and then draw enlarged pictures of the area gradually approaching the extreme point of the limit curve on the three grid plates 2 on the rear side, the middle, and the front side, and then slide the three grid plates 2 to the magnetic display board 1 in turn. upper right corner, and close the two magnetic writing pads3. When teaching, the teacher can first write on the blackboard and explain the coordinate grid lines 1-2 on the two magnetic writing boards 3, and then open the two magnetic writing boards 3 after explaining for a certain period of time, and slide and cover the grid board 2 on the rear side In the lower left corner of the magnetic display board 1, close the two magnetic writing boards 3, continue to explain the enlarged picture drawn on the grid board 2 on the rear side, open the two magnetic writing boards 3 after explaining for a certain period of time, and put the grid board in the middle 2 Slide and cover the grid board 2 on the rear side, and close the two magnetic writing boards 3, continue to explain the enlarged picture drawn on the middle grid board 2, and open the two magnetic writing boards 3 after explaining for a certain period of time, Slide the grid plate 2 on the front side to cover the grid plate 2 in the middle, and close the two magnetic writing pads 3, and continue to explain the enlarged picture drawn on the grid plate 2 on the front side, through the three grids The successive coverage of board 2 makes the limit curve gradually approach the extreme point in the eyes of students, and enhance students' comprehension ability through intuitive viewing and supplemented by teacher's explanation. A hanging ring is installed on the rear facade of the magnetic display board 1, and the lower end of the magnetic display board 1 is inserted on the telescopic rod 5, so that the magnetic display board 1 can be placed and used or hung.

For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other forms without departing from the spirit or basic features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to be included in the claims All changes within the meaning and range of equivalents to the claims are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A new type of mathematics limit teaching tool, including a magnetic display board (1), a telescopic rod (5) and a bottom plate (6), characterized in that: the new type of mathematics limit teaching tool also includes an extreme value marking magnetic block (4) , two magnetic writing boards (3) and three grid boards (2), the magnetic display board (1) is a square vertical board, and the front facade of the magnetic display board (1) is provided with two chutes (1-1 ), the two chutes (1-1) are opened from the lower left corner to the upper right corner of the magnetic display board (1) and are arranged parallel to each other. The front facade of the magnetic display board (1) is painted with Coordinate grid lines (1-2), the extreme value marking magnetic blocks (4) are adsorbed on the coordinate grid lines (1-2), and each grid plate (2) is composed of a grid plate The main body (2-1) and the L-shaped frame (2-2) fixed on the lower left corner of the front facade of the grid plate body (2-1), the grid plate body (2-2) of the three grid plates (2) 1) From front to back, it is arranged on the upper right quarter of the front facade of the magnetic display panel (1), and the grid panel (2) on the rear side passes through a pair of magnetic sliders (2-3 ) is slidingly connected with the two chute (1-1), and the grid plate (2) in the middle is slidably connected with the two chute (1-1) through a pair of magnetic sliders 2 (2-4). The grid panel (2) on the side is slidingly connected to the two chute (1-1) through a pair of magnetic sliders 3 (2-5). A magnetic writing board (3) is adsorbed on the lower right quarter of the board surface, and a circular groove is provided in the middle of the lower end surface of the magnetic display board (1). In the circular groove, the other end of the telescopic rod (5) is vertically fixed on the base plate (6). 2. A new type of mathematics limit teaching tool according to claim 1, characterized in that: the grid plate (2) located on the front side, the grid plate (2) located in the middle, and the mesh plate located on the rear side The grid size of grid plate (2) and coordinate grid line (1-2) decreases successively. 3. A new type of mathematics limit teaching tool according to claim 1 or 2, characterized in that: the magnetic display board (1) is fixed with a frame (1-3) around it, and the frame (1-3 ) Protruding magnetic display panels (1) Set on the front facade. 4. A novel mathematics limit teaching tool according to claim 3, characterized in that the two magnetic writing boards (3) are hinged to the corresponding positions of the frame (1-3). 5. A new type of mathematics limit teaching tool according to claim 1, characterized in that four rollers (7) are installed on the lower surface of the bottom plate (6), and the four rollers (7) are rectangular layout. 6. A novel mathematics limit teaching tool according to claim 1, characterized in that: said magnetic display panel (1) is equipped with a hanging ring on the rear facade.