CN206558066U - On round mathematical teaching apparatus - Google Patents

Abstract

The utility model discloses a kind of on round mathematical teaching apparatus, including base and the left socle and right support that are set in parallel on base, left connecting rod and right connecting rod have been respectively articulated with the left socle and right support, the left connecting rod and right connecting rod include cross tube, montant and the sheer pole of ending connection, the cross tube and sheer pole be arranged in parallel and positioned at the both sides of montant, dismountable circle chi is provided with the sheer pole, the other end of the cross tube through left socle or right support, which is provided with, tightens nut；The utility model is on round mathematical teaching apparatus by the way that 2 round chis are detachably arranged on support, utilize the rotation of connecting rod, to demonstrate the outer from, circumscribed, intersecting, inscribe and the five kinds of relations included of two circles, student is improved to round correct understanding, the removable circle chi unloaded down facilitates teacher to draw simultaneously, the picture time is saved, efficiency of teaching is improved.

Description

Mathematical teaching device about circles

technical field

The utility model belongs to the technical field of models used in science, medicine or mathematics, such as devices with real dimensions used for demonstration, in particular to a mathematics teaching device about circles.

Background technique

Circles are often seen in daily life, such as basketball, football, etc., but it is not easy to draw a circle, especially when teaching, if the effect of the circle drawn is not neat, it is easy to cause problems. The misunderstanding of beginners makes it difficult to lay a good foundation, and it takes a long time to correct the graphics. Especially when the math teacher is in class, when he gestures or explains the relationship between circles, it takes a long time to draw pictures, which is inefficient and takes a long time.

Contents of the invention

In view of this, the purpose of this utility model is to provide a mathematics teaching device about a circle, which demonstrates the relationship between two circles by detachably installing two round rulers on the bracket and utilizing the rotation of the connecting rod. The five relationships of extrinsic, exotangent, intersecting, inscribed and inscribed improve students' correct understanding of the circle. At the same time, the detachable round ruler is convenient for teachers to draw, saving drawing time and improving teaching efficiency.

In order to achieve the above object, the utility model is a mathematics teaching device about a circle, including a base, and a left bracket and a right bracket arranged in parallel on the base, and the left bracket and the right bracket are respectively hinged with a left connecting rod and a right connecting rod Rods, the left and right connecting rods all include an upper cross bar, a vertical bar and a lower cross bar connected at the end, the upper cross bar and the lower cross bar are arranged in parallel and are located on both sides of the vertical bar, and the lower cross bar A detachable circular plate is arranged on the bar, and the other end of the upper cross bar passing through the left bracket or the right bracket is connected with a tightening nut.

Further, the circular plate is a transparent round ruler made of plastic.

Further, a round hole is set in the middle of the transparent round ruler and fitted on the lower cross bar, and a convex portion for holding is set on the outer side of the round hole.

The beneficial effects of the utility model are:

The utility model about the mathematics teaching device of the circle, through the detachable installation of two round rulers on the bracket, uses the rotation of the connecting rod to demonstrate the five kinds of outer separation, outer cutting, intersection, inner cutting and inner cutting of two circles. relationship, improve students' correct understanding of the circle, and at the same time, the detachable round ruler is convenient for the teacher to draw, saves time for drawing, and improves teaching efficiency.

Description of drawings

In order to make the purpose, technical solutions and beneficial effects of the utility model clearer, the utility model provides the following drawings for illustration:

Fig. 1 is the structural representation of the utility model about the mathematics teaching device of circle;

Fig. 2 is the use state figure of the utility model about the mathematics teaching device of circle;

Fig. 3 is a side view of the teaching device for circle mathematics of the present invention.

Reference signs: 1-base; 2-left bracket; 3-right bracket; 4-left connecting rod; 5-round ruler I; 6-right connecting rod; 7-round ruler II; 8-upper cross bar; 9- Vertical bar; 10-lower cross bar; 11-convex part; 12-tightening nut.

detailed description

The preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, it is the structural representation of the mathematics teaching device of the utility model about the circle; as shown in Figure 2, it is the use state diagram of the mathematics teaching device of the utility model about the circle; as shown in Figure 3, it is the utility model about the circle of the utility model The side view figure of the mathematics teaching device of the utility model; a kind of mathematics teaching device about circle of the utility model, comprises base 1, and the left bracket 2 and the right bracket 3 that are arranged in parallel on the base 1, described left bracket 2 and right bracket 3 A left link 4 and a right link 6 are respectively hinged on the top, and the left link 4 and the right link 6 all include an upper cross bar 8, a vertical bar 9 and a lower cross bar 10 connected at the end, and the upper cross bar 8 Parallel to the lower cross bar 10 and located on both sides of the vertical bar 9, the lower cross bar 10 is provided with a detachable circular plate, and the upper cross bar 8 is connected through the other end of the left bracket 3 or the right bracket 4 There are 12 tightening nuts.

In this embodiment, the round ruler I5 and the round ruler II7 are respectively detachably installed on the lower cross bar 10 of the left connecting rod 4 and on the lower cross bar 10 of the right connecting rod 6, and the left connecting rod 4 and the right connecting rod 6 are respectively used. Rotate around the left bracket 2 and the right bracket 3 to demonstrate the five relationships of the two circles' separation, circumcision, intersection, incision and inclusion. During the demonstration, tighten the nut 12 to make the left connecting rod 4 and The right connecting rod 6 can be fixed at any position. At this time, the teaching device is placed on the desk, which is convenient for students to position the two circles at any time, and improves students' correct understanding of the circle. At the same time, the teacher can write or explain on the blackboard with free hands. In addition, the disassembled round ruler is convenient for teachers to draw pictures, saves drawing time and improves teaching efficiency.

Further, preferably, the circular plate is a transparent round ruler made of plastic.

Further, preferably, the middle of the transparent round ruler is provided with a round hole set on the lower crossbar, and the outer side of the round hole is provided with a convex part 11 for holding. Draw pictures to improve the quality of teaching.

Finally, it is noted that the above preferred embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in the form Various changes can be made in the above and in the details without departing from the scope defined by the claims of the present invention.

Claims (3)

1. A kind of mathematics teaching device about circle, it is characterized in that: comprise base, and the left support and the right support that are arranged on the base in parallel, on described left support and right support, be respectively hinged with left connecting rod and right connecting rod, The left connecting rod and the right connecting rod all include an upper cross bar, a vertical bar and a lower cross bar connected at the end, the upper cross bar and the lower cross bar are arranged in parallel and are located on both sides of the vertical bar, A detachable circular plate is provided, and the other end of the upper cross bar passing through the left bracket or the right bracket is connected with a tightening nut. 2. The mathematics teaching device about circles as claimed in claim 1, characterized in that: said circular plate is a transparent round ruler made of plastic. 3. The mathematics teaching device about circles as claimed in claim 2, characterized in that: a circular hole set in the middle of the transparent circular ruler is set on the lower crossbar, and a convex part for holding is provided on the outside of the circular hole .