CN205487004U - Linear algebra teaching is with combination formula teaching aid - Google Patents

Abstract

A combined teaching aid for linear algebra teaching, which belongs to the field of teaching tools and solves the problems existing in the current linear algebra teaching process. It includes a plurality of straight boards arranged vertically, and the straight boards are sequentially connected by a plurality of elastic bands arranged horizontally , the surface of each straight board is a writing surface such as a blackboard or a whiteboard. The two outermost straight boards are connected by two telescopic rods. A hook plate is respectively arranged above the upper part, and the utility model is used for linear algebra teaching.

Description

A combined teaching aid for linear algebra teaching

technical field

The utility model belongs to the field of teaching tools, in particular to a combined teaching tool for linear algebra teaching.

Background technique

Linear algebra is one of the important courses in college mathematics. At present, in the process of linear algebra teaching, examples such as determinants, matrices, and linear equations are often handwritten on the blackboard. Even serial errors seriously affect teaching and often waste a lot of valuable teaching time.

Contents of the invention

The purpose of this utility model is in order to solve the above-mentioned problem existing in the linear algebra teaching process at present, a kind of linear algebra teaching combined teaching aid is provided, and its technical scheme is as follows:

A combined teaching aid for linear algebra teaching, which includes a plurality of vertically arranged straight boards, which are sequentially connected by a plurality of horizontally arranged elastic bands. The surface of each straight board is a writing surface such as a blackboard or a whiteboard, and is located on the outermost side. The two straight plates are connected by two telescopic rods, and each telescopic rod is provided with a length positioning device. Each telescopic rod contains an outer tube and an inner tube inserted into the outer tube. The set has a round stopper whose outer diameter is the same as that of the outer tube. The end face of the outer tube opposite to the stopper is inclined. The opposite end face of the sheet is inclined, so the outer tube can only touch the edge of the block at a point, so the block can play a good role in limiting the position, thereby controlling the length of the telescopic rod, and the cost of this structure as a length positioning device is extremely low ; A hook plate is respectively arranged above the two outermost straight boards for hooking the upper frame of the blackboard, and longitudinal through holes are arranged in the two outermost straight boards, and at the lower end of each hook board Set a round rod, one end of the round rod is fixedly connected with the hook plate, the outer diameter of the round rod is smaller than the diameter of the through hole, the round rod is inserted into the through hole of the corresponding straight plate, and the lower end of the round rod is connected with the upper end of the extension spring , the lower end of the extension spring is connected with the rope, and a plurality of retaining rods are arranged on the rope, the diameter of each retaining rod is smaller than the diameter of the through hole, so that the retaining rod can be inserted into the through hole, and the length of each retaining rod is greater than the through hole diameter, the middle position of each retaining rod is fixedly connected with the rope, so that the retaining rod can play the role of blocking the straight board when it is perpendicular to the rope.

The beneficial effects of the utility model are: it can ensure that there will be no misalignment of ranks and columns in the handwriting process, so that the teaching can be carried out smoothly without wasting precious teaching time; The length of each space can be controlled at the same time, and the vertical position of the teaching aid on the blackboard can be easily adjusted by selecting different stop bars; this teaching aid also has the advantage of low cost and is suitable for general promotion and use.

Description of drawings:

Fig. 1 is the overall schematic diagram of the utility model;

Figure 2 is an enlarged view of the position of the straight plate in Figure 1;

Fig. 3 is a schematic diagram of the length positioning of the telescopic rod;

Fig. 4 is the connection schematic diagram of hook plate and straight plate;

Fig. 5 is a use state diagram of the utility model.

detailed description:

Referring to Fig. 1 to Fig. 5, a combined teaching aid for linear algebra teaching, it comprises a plurality of straight boards 1 arranged vertically, and a plurality of straight boards 1 are sequentially connected by a plurality of elastic bands 2 arranged horizontally, and the surface of each straight board 1 is It is a writing surface such as a blackboard or a whiteboard, and the two outermost straight boards 1 are connected by two telescopic rods 3, and each telescopic rod 3 is provided with a length positioning device, and each telescopic rod 3 includes an outer tube 3- 1 and an inner tube 3-2 plugged in with the outer tube 3-1, and a circular stopper 3 with the same outer diameter as that of the outer tube 3-1 is set on the inner tube 3-2 -3, the end face of the outer tube 3-1 opposite to the baffle 3-3 is a slope, although the baffle 3-3 can slide on the inner tube 3-2, but because the outer tube 3-1 and the baffle 3 -3 The opposite end face is an inclined plane, so the outer tube 3-1 can only touch the edge of the blocking piece 3-3 at a point, so the blocking piece 3-3 can play a good role in limiting, thereby controlling the length of the telescopic rod 3 , the cost of using this structure as a length positioning device is extremely low; a hook plate 4 is respectively arranged above the two outermost straight boards 1 for hooking the upper frame of the blackboard 5, and in the two outermost straight boards 1 Both are provided with longitudinal through holes 1-1, and a round rod 4-1 is arranged at the lower end of each hook plate 4, and one end of the round rod 4-1 is fixedly connected with the hook plate 4, and the outer diameter of the round rod 4-1 Smaller than the diameter of the through hole 1-1, the round rod 4-1 is inserted in the corresponding through hole 1-1 of the straight plate 1, the lower end of the round rod 4-1 is connected with the upper end of the extension spring 4-2, and the extension spring 4-1 The lower end of 2 is connected with rope 4-3, is provided with a plurality of stop bar 4-3-1 on rope 4-3, and the diameter of each stop bar 4-3-1 is less than the diameter of through hole 1-1, makes stop bar Rod 4-3-1 can be inserted in the through hole 1-1, and the length of each retaining rod 4-3-1 is greater than the diameter of through hole 1-1, and the middle position of each retaining rod 4-3-1 and rope 4-3 is fixedly connected, so that the bar 4-3-1 can block the straight board 1 when it is perpendicular to the rope 4-3.

Preferably, the straight boards 1 except the two outermost straight boards 1 are all made of light-weight materials such as carbon fiber, so as to prevent the middle position of the elastic band 2 from bending downwards.

Claims (2)

1. A combined teaching aid for linear algebra teaching is characterized in that it comprises a plurality of straight boards (1) arranged vertically, and a plurality of straight boards (1) are connected successively by a plurality of elastic bands (2) arranged horizontally, and each straight board The surfaces of (1) are all writing surfaces, and the two straight boards (1) located at the outermost side are connected by two telescopic rods (3), and each telescopic rod (3) is provided with a length positioning device; A hook plate (4) is arranged respectively above the two straight plates (1), and longitudinal through holes (1-1) are arranged in the two straight plates (1) positioned at the outermost sides, and each hook plate (4 ) is provided with a round rod (4-1), one end of the round rod (4-1) is fixedly connected with the hook plate (4), and the outer diameter of the round rod (4-1) is smaller than the through hole (1-1) The diameter of the round rod (4-1) is inserted in the through hole (1-1) of the corresponding straight plate (1), and the lower end of the round rod (4-1) is connected with the upper end of the extension spring (4-2), The lower end of extension spring (4-2) is connected with rope (4-3), is provided with a plurality of retaining rods (4-3-1) on rope (4-3), each retaining rod (4-3-1 ) diameter is less than the diameter of the through hole (1-1), the length of each retaining rod (4-3-1) is greater than the diameter of the through hole (1-1), each retaining rod (4-3-1) The middle position is fixedly connected with rope (4-3). 2. A kind of combined teaching aid for linear algebra teaching as claimed in claim 1, is characterized in that each telescoping rod (3) comprises an outer tube (3-1) and an outer tube (3-1) plug-in The inner tube (3-2) connected to the inner tube (3-2) is also set with a circular stopper (3-3) whose outer diameter is the same as that of the outer tube (3-1), The end face of the outer tube (3-1) opposite to the blocking piece (3-3) is an inclined plane.