CN211684388U

CN211684388U - Multifunctional trigonometric function value solution assisting device

Info

Publication number: CN211684388U
Application number: CN202020103380.2U
Authority: CN
Inventors: 张华�
Original assignee: Zhengzhou Preschool Education College
Current assignee: Zhengzhou Preschool Education College
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-10-16
Anticipated expiration: 2030-01-17

Abstract

The utility model discloses a multi-functional trigonometric function value helps separates device, including protractor, No. one chi, No. two chi and No. three chi, protractor downside middle part is provided with the through-hole, and the through-hole middle part is fixed with the runing rest, the protractor rear side is through the runing rest with the left end fixed connection of No. one chi, and No. one chi downside aligns with the zero scale mark of protractor, the protractor front side is through the runing rest with the left lower extreme rotation of No. two chi, No. one chi lower part is fixed with first magnetic stripe, No. two chi upper left portion is fixed with the second magnetic stripe, No. three chi front side upper right portion is provided with the iron sheet, first magnetic stripe middle part level is provided with the spout, the spout middle part slides and has the right-hand member, No. one chi upper end is provided with the foot needle, and the outside cover of foot needle is equipped with the foot needle cap, and no; the utility model has the advantages of simple structure, quick adjustment, convenient operation, improved teaching efficiency and circle drawing function.

Description

Multifunctional trigonometric function value solution assisting device

Technical Field

The utility model belongs to mathematics teaching aid field, in particular to multi-functional trigonometric function helps separates device.

Background

A trigonometric function is one of six basic elementary functions, namely a function taking an angle as an independent variable, the angle is important in researching the properties of geometric figures such as triangles, circles and the like, and is also a basic teaching tool for researching periodic phenomena, in the mathematical analysis, the trigonometric function is also defined as the solution of infinite series or specific differential equations, the values of the functions are allowed to be expanded to any real values or even complex values, in the teaching of the trigonometric function, a unit is often required to be drawn as a circle for the students to understand, the existing teaching aid for solving the trigonometric function is not provided with the function of drawing a circle, and meanwhile, the existing teaching aid for solving the trigonometric function is usually fixed through a fixed block or a rotatable nut when the angle or the length is adjusted, this method is troublesome and time consuming, reducing teaching efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multi-functional trigonometric function helps separates device has simple structure, adjusts fast, convenient operation, improves teaching efficiency, has the advantage of the function of drawing the circle.

In order to achieve the above object, the utility model provides a following technical scheme: a multifunctional trigonometric function value help-resolve device comprises a protractor, a first ruler, a second ruler and a third ruler, wherein the diameter of the protractor is 5-15cm, a through hole is formed in the middle of the lower side of the protractor, a rotating support is fixed in the middle of the through hole, the rear side of the protractor is fixedly connected with the left end of the first ruler through the rotating support, the lower side of the first ruler is aligned with a zero graduation line of the protractor, the front side of the protractor is rotatably connected with the left lower end of the second ruler through the rotating support, a first magnetic stripe is fixed on the lower portion of the first ruler, a second magnetic stripe is fixed on the upper left portion of the second ruler, an iron sheet is arranged on the upper right portion of the front side of the third ruler, a sliding groove is horizontally formed in the middle of the first magnetic stripe, a sliding block is arranged in the middle of the sliding groove, the front side of the sliding block is fixedly connected with the right lower end of the third, the front side of the right end of the second ruler is provided with a chalk groove.

Preferably, angle scale marks are marked on the outer side of the protractor, and length scale marks are marked on the first ruler, the second ruler and the third ruler.

Preferably, the diameter of the chalk groove is the same as that of the chalk.

Preferably, the chalk groove is fixedly connected with the first ruler.

Preferably, the foot needle is fixedly connected with the second ruler.

Preferably, the protractor is semicircular, and the diameter of the protractor ruler is 10 cm.

Preferably, the thicknesses of the first ruler, the second ruler, the third ruler, the first magnetic strip, the second magnetic strip and the iron sheet are the same as the thickness of the protractor.

Preferably, the rotating support comprises a cross rod, a baffle is arranged at the front end of the cross rod, and the distance between the protractor and the first ruler is the same as the thickness of the third ruler.

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

the utility model can measure the angle through the protractor, the diameter of the protractor is 5-10cm, the protractor can be used as a unit circle, the lengths of two right-angle sides of the angle can be measured through the first ruler and the third ruler, thereby assisting the teaching of the trigonometric function definition, when the teaching of the trigonometric function formula is carried out, the first ruler, the second ruler and the third ruler can form an arbitrary triangle, thereby realizing the measurement of the angle and the three sides of the triangle, leading the teaching of the trigonometric function to be more vivid, direct and efficient, simultaneously, a teacher can fix the triangle formed by the first ruler, the second ruler and the third ruler through the attractive force between the first magnetic stripe, the second magnetic stripe and the iron sheet only by aligning the first ruler, the second ruler and the third ruler with three sides of the triangle through magnetic field force, the fixing mode is simple and fast, and the teaching efficiency of the teacher is improved, simultaneously through foot needle and chalk groove, can realize the function of compasses, avoid the teacher to give a lesson in need change the trouble of teaching aid, the utility model discloses collect multiple functions in an organic whole such as angular surveying, length measurement, drawing a circle for operate convenient and fast more.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the right side of the rotary stand of the present invention

In the figure: 1. protractor, 2, through-hole, 3, runing rest, 31, horizontal pole, 32, baffle, 4, a chi, 5, No. two chi, 6, No. three chi, 7, first magnetic stripe, 8, second magnetic stripe, 9, iron sheet, 10, spout, 11, sliding block, 12, chalk groove, 13, pin, 14, pin cap.

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.

Referring to fig. 1-2, the present embodiment provides a multi-functional trigonometric function value solution assisting device, including a protractor 1, a first ruler 4, a second ruler 5 and a third ruler 6, the diameter of the protractor 1 is 5-15cm, a through hole 2 is provided in the middle of the lower side of the protractor 1, a rotating bracket 3 is fixed in the middle of the through hole 2, the rear side of the protractor 1 is fixedly connected to the left end of the first ruler 4 through the rotating bracket 3, the lower side of the first ruler 4 is aligned to a zero scale line of the protractor 1, the front side of the protractor 1 is rotatably connected to the left lower end of the second ruler 5 through the rotating bracket 3, a first magnetic strip 7 is fixed on the lower part of the first ruler 4, a second magnetic strip 8 is fixed on the upper left part of the second ruler 5, an iron sheet 9 is provided on the upper right part of the front side of the third ruler 6, a sliding groove 10 is horizontally provided in the middle of the first magnetic strip, slide 11 front side and No. 6 right lower extremes fixed connection of chi, No. 4 upper ends of chi are provided with the pin 13, and the outside cover of pin 13 is equipped with the pin cap 14, and No. 5 right-hand members front sides of chi are provided with chalk groove 12.

In order to facilitate reading out the measurement data, in this embodiment, preferably, angle scale marks are marked on the outer side of the protractor 1, and length scale marks are marked on the first ruler 4, the second ruler 5, and the third ruler 6.

In order to facilitate the insertion of the chalk into the chalk groove 12 so as to perform a circle drawing function in cooperation with the pin 13, it is preferable that the diameter of the chalk groove 12 is the same as the diameter of the chalk.

In order to fix the chalk groove 12 on the first ruler 4, the chalk groove 12 is preferably fixedly connected with the first ruler 4.

In order to fix the needle 13 to the second ruler 5, the needle 13 is preferably fixedly connected to the second ruler 5.

In order to be able to use the protractor 1 as a unit circle and set to 10cm for easy calculation by students, thereby enabling to improve lecture efficiency, it is preferable that the protractor 1 is semicircular and the diameter of the protractor 1 is 10 cm.

In order to enable the first ruler 4, the second ruler 5, the third ruler 6, the first magnet/7, the second magnet strip 8, the iron sheet 9 and the protractor 1 to be matched with each other, preferably, the thicknesses of the first ruler 4, the second ruler 5, the third ruler 6, the first magnet/7, the second magnet strip 8 and the iron sheet 9 are the same as the thickness of the protractor 1.

In order to limit the second ruler 5 and the third ruler 6, prevent the second ruler from moving back and forth, and simultaneously use the protractor 1 as a unit circle, so that the coordinates of points on the unit circle can be conveniently measured, and the protractor can be folded to save space when not in use, preferably, the rotating support 3 comprises a cross rod, the front end of the cross rod 31 is provided with a baffle 32, and the distance between the protractor 1 and the first ruler 4 is the same as the thickness of the third ruler 6.

The utility model discloses a theory of operation: firstly, the through hole 2 is aligned to the angle measurement, the first ruler 4 is aligned with the zero graduation line of the angle gauge 1, the first ruler 4 and the angle gauge 1 are fixedly connected with the cross bar 31, the relative positions of the first ruler 4 and the angle gauge 1 are always consistent, thus, only the first ruler 4 is aligned with one adjacent side of the measured angle, then the second ruler 5 is rotated to be aligned with the other adjacent side of the measured angle, the position read by the angle gauge 1 is the angle of the measured angle, the first ruler 4 and the angle gauge 1 are fixedly connected with the cross bar 31, the zero adjustment of the angle is not needed, much time is saved, the lecture efficiency is improved, the third ruler 6 can be adjusted at will, the sliding block 11 at the lower end of the third ruler 6 can move at will along the sliding groove 10, meanwhile, the sliding block 11 can rotate in the sliding groove 10, thereby facilitating the rotation and the movement of the third ruler 6, when the position is adjusted, the iron sheet 9 on the third ruler 6 can be fixed with the second magnetic strip 8 and the first magnetic strip 7 by themselves respectively, the first magnetic strip 7 and the second magnetic strip 8 both have good magnetism, so that the operation is convenient and fast, meanwhile, the protractor 1 can be used as a unit circle, the third ruler 6 is adjusted to be in a state of being perpendicular to the first ruler 4, and then the second ruler 5, the third ruler 6 and the protractor 1 are intersected at the same point, so that the coordinates of a measuring point can be measured, the understanding of a student on trigonometric function definition is facilitated, the teaching is more convenient and fast, when explaining the trigonometric function needs to be drawn, chalk is inserted into the chalk groove 12, then the pin cap 14 is pulled out, the function of compasses can be realized to draw a circle, the pin cap 14 has a protection function, when the circle does not need to be drawn, the pin 12 is covered by the pin cap 14, the pin 12 is prevented from hurting people, and the safety of the utility model is improved, simultaneously the utility model discloses combine together angle measurement, length measurement and drawing circle function, improved practicality and mr's teaching efficiency, it is fixed by oneself to press and the appeal between the iron sheet 9 through first magnetic stripe 7, second magnetic stripe 8 simultaneously for operate convenient and fast more.

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 multi-functional trigonometric function value helps separates device, includes protractor, a chi, No. two chi and No. three chi, its characterized in that: the diameter of protractor is 5-15cm, protractor downside middle part is provided with the through-hole, and the through-hole middle part is fixed with the runing rest, the protractor rear side passes through the runing rest and the left end fixed connection of a chi, and just a chi downside aligns with the zero scale mark of protractor, the protractor front side passes through the runing rest and is connected with the rotation of the left lower extreme of No. two chi, a chi lower part is fixed with first magnetic stripe, the upper left portion of No. two chi is fixed with the second magnetic stripe, the upper right portion of No. three chi front side is provided with the iron sheet, first magnetic stripe middle part level is provided with the spout, the spout middle part slides there is the sliding block, sliding block front side and the right lower extreme fixed connection of No. three chi, a chi upper end is provided with the foot needle, and the outside cover of foot needle is equipped with the foot needle cap, and No..

2. The multi-function trigonometric function solution assisting device of claim 1, wherein: the outside of protractor is carved with the angle scale mark, all be carved with length scale mark on No. one chi, No. two chi, No. three chi.

3. The multi-function trigonometric function solution assisting device of claim 1, wherein: the diameter of the chalk groove is the same as that of the chalk.

4. The multi-function trigonometric function solution assisting device of claim 1, wherein: the chalk groove is fixedly connected with the first ruler.

5. The multi-function trigonometric function solution assisting device of claim 1, wherein: the pin is fixedly connected with the second ruler.

6. The multi-function trigonometric function solution assisting device of claim 1, wherein: the protractor is semicircular, and the diameter of the protractor ruler is 10 cm.

7. The multi-function trigonometric function solution assisting device of claim 1, wherein: the thickness of the first ruler, the second ruler, the third ruler, the first magnetic strip, the second magnetic strip and the iron sheet is the same as that of the protractor.

8. The multi-function trigonometric function solution assisting device of claim 1, wherein: the rotary support comprises a cross rod, a baffle is arranged at the front end of the cross rod, and the distance between the protractor and the first ruler is the same as the thickness of the third ruler.