CN208593211U - A kind of mathematical angle MEASUREMENT TEACHING instrument - Google Patents

Abstract

The utility model discloses a kind of mathematical angle MEASUREMENT TEACHING instrument, including the first ruler, one end of first ruler is flexibly connected by the first pin shaft respectively at the positive bottom of semi-circle ruler and one end of third ruler, the other end of first ruler is flexibly connected by the second pin shaft with one end of the second ruler, the other end of second ruler is flexibly connected by third pin shaft with the other end of third ruler, a kind of mathematical angle MEASUREMENT TEACHING instrument of the utility model, first ruler, semi-circle ruler and third ruler are flexibly connected by the first pin shaft, it can be realized and paint and measure at any angle, improve the measurement of angle and the simplicity of drawing in teaching, understand convenient for students and remembers；Be put into chalk in fixed device, the first ruler and third ruler are used cooperatively, can by teaching appliance as compasses using angle drawing and measurement is carried out, improve the use function of teaching.

Description

A kind of mathematical angle MEASUREMENT TEACHING instrument

Technical field

The utility model relates to teaching appliance, in particular to a kind of mathematical angle MEASUREMENT TEACHING instrument belongs to teaching aid technology Field.

Background technique

In the mathematical education in middle school, there are many angle measurement problem, instructors generally use ruler, semi-circle ruler and compasses With the use of the technique of painting and measurement method for showing various angles to students, grasps and how to draw angle and measurement angle to student Calculate angle problem tool be very helpful.

At present in mathematics classroom, classrooms are using ruler, semi-circle ruler and circle for the measurement of each angle and drawing Rule, the combined use process too complex of this variety of rulers are unfavorable for students and understand and remember, meanwhile, semi-circle ruler can only Angle within 180 ° of measurement, angle more than 180 ° just can not one-shot measurement come out.

Summary of the invention

The purpose of this utility model is to provide a kind of mathematical angle MEASUREMENT TEACHING instrument, to solve to mention in above-mentioned background technique Too complex is used in combination in a variety of rulers out, is asked simultaneously for 180 ° with what the drawing of upper angle and measurement easy can not measure Topic.

To achieve the above object, the utility model provides the following technical solutions: a kind of mathematical angle MEASUREMENT TEACHING instrument, including One end of first ruler and semi-circle ruler, first ruler is straight respectively at the positive bottom of semi-circle ruler and third by the first pin shaft One end of ruler is flexibly connected, and the other end of first ruler is flexibly connected by the second pin shaft with one end of the second ruler, institute The other end for stating the second ruler is flexibly connected by third pin shaft with the other end of third ruler, the other end of the third ruler It is fixedly connected with fixed device, first ruler and the positive of third ruler are carved with scale strip.And the semi-circle ruler is just It is carved with angle item in face.

As a kind of optimal technical scheme of the utility model, the fixed device includes cylindrical drum, the cylindrical drum One end is fixedly connected with the other end of third ruler, is threaded with the bar that is screwed in the middle part of the cylindrical drum top, described The other end of cylindrical drum is symmetrically opened up there are two rectangular channel.

As a kind of optimal technical scheme of the utility model, the top of first ruler offers placing groove, and institute It states placing groove and is slightly longer than the second ruler.

As a kind of optimal technical scheme of the utility model, the bottom of first ruler, the second ruler and third ruler End tool is equipped with slip-resistant texture.

As a kind of optimal technical scheme of the utility model, the bottom end of the semi-circle ruler is equipped with link.

Compared with prior art, the utility model has the beneficial effects that a kind of mathematical angle MEASUREMENT TEACHING of the utility model Instrument, the first ruler, semi-circle ruler and third ruler are flexibly connected by the first pin shaft, be can be realized and are painted and survey at any angle Amount, improves the simplicity of the measurement of angle and drawing in mathematical education, understands convenient for students and remembers；In fixed device Be put into chalk, the first ruler and third ruler are used cooperatively, can by teaching appliance as compasses using carry out angle drawing and Measurement, improves the use function of teaching；First ruler, the second ruler and third ruler pass through the first pin shaft, the second pin shaft and the The flexible connection of three pin shafts can be changing into the set square of different angle, be convenient for the different angle that shows and paint to students, into One step improves the drawing efficiency of various angles.

Detailed description of the invention

Fig. 1 is the utility model positive structure schematic；

Fig. 2 is the unfolded state structural schematic diagram of the utility model；

Fig. 3 is the fixture structure schematic diagram of the utility model；

Fig. 4 is the structural schematic diagram of first ruler of the utility model.

In figure: 1, the first ruler；2, the first pin shaft；3, the second pin shaft；4, semi-circle ruler；5, the second ruler；6, third ruler； 7, third pin shaft；8, fixed device；9, cylindrical drum；10, rectangular channel；11, be screwed bar；12, placing groove.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-4 is please referred to, the utility model provides a kind of mathematical angle MEASUREMENT TEACHING instrument, including the first ruler 1 and half One end of circle ruler 4, the first ruler 1 is living respectively at the positive bottom of semi-circle ruler 4 and one end of third ruler 6 by the first pin shaft 2 The other end of dynamic connection, the first ruler 1 is flexibly connected by the second pin shaft 3 with one end of the second ruler 5, the second ruler 5 it is another One end is flexibly connected by third pin shaft 7 with the other end of third ruler 6, and the other end of third ruler 6 is fixedly connected with fixation It is carved with scale strip in the front of device 8, the first ruler 1 and third ruler 6.And angle item is carved in the front of semi-circle ruler 4.

Preferably, fixed device 8 includes cylindrical drum 9, and one end of cylindrical drum 9 is fixedly connected with the other end of third ruler 6, It is threaded with the bar 11 that is screwed in the middle part of 9 top of cylindrical drum, the other end of cylindrical drum 9 symmetrically opens up that there are two rectangular channels 10, it is capable of fixing chalk or marking pen, angle drawing is convenient for and marks.

Preferably, the top of the first ruler 1 offers placing groove 12, and placing groove is slightly longer than the second ruler 5, realizes second Ruler 5 is accommodated in the first ruler 1, convenient for being changed when teaching appliance difference purposes.

Preferably, the bottom end tool of the first ruler 1, the second ruler 5 and third ruler 6 is equipped with slip-resistant texture, improves hand and religion The friction between instrument is learned, convenient for measurement and the drawing for carrying out angle of holding steadily.

Preferably, the bottom end of semi-circle ruler 4 is equipped with link, and the not applicable moment hangs on wall, saves occupied space, together When break teaching appliance when preventing student from playing.

When specifically used, a kind of mathematical angle MEASUREMENT TEACHING instrument of the utility model, when measurement is with regard to angle on blackboard, by the Two rulers 5 are taken in the placing groove 12 on 1 top of the first ruler, and the top of the first ruler 1 and angle one end is aligned, by the Three rulers 6 rotate on the other end straight line of angle, and the angle that the first ruler of observation 1 is formed with third ruler 6 is on semi-circle ruler 4 Angle, it is the angle that the first ruler 1, which is formed by angle with third ruler 6, when needing to measure 180 ° or more of angle, Semi-circle ruler 4 need to only be rotated to 180 ° and arrive bottom end, then third ruler 6 is aligned with the measurement angle other end, the angle on semi-circle ruler adds Upper 180 ° be the measurement angle angle value, when needing to carry out angle drawing, can use the first ruler 1, semi-circle ruler 4 and third Ruler 6 is used cooperatively the angle for drawing needs, chalk or marking pen can also be put into fixed device 8, with 1 one end of the first ruler For circle, the vertical range of 1 one end of the other end of third ruler 6 and the first ruler is that radius draws circle, is utilizing 1 He of the first ruler Semi-circle ruler 4 carries out the drawing of various angles in circle, can also take out one end of the second ruler 5, pass through third pin shaft 7 and third Ruler 6 is flexibly connected, and assembles the set square that can arbitrarily change at an angle, and the angle of the set square one end can pass through half Intuitively projection comes out circle ruler 4.

In the description of the present invention, it should be understood that term " coaxial ", " bottom ", " one end ", " top ", " in The orientation of the instructions such as portion ", " other end ", "upper", " side ", " top ", "inner", " front ", " center ", " both ends " or position are closed System is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, rather than The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot It is construed as a limitation of the present invention.

In addition, term " first ", " second ", " third ", " the 4th " are used for description purposes only, and should not be understood as instruction or It implies relative importance or implicitly indicates the quantity of indicated technical characteristic, define " first ", " second ", " the as a result, Three ", the feature of " the 4th " can explicitly or implicitly include at least one of the features.

In the present invention unless specifically defined or limited otherwise, term " installation ", " setting ", " connection ", " Gu Calmly ", the terms such as " being screwed on " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral； It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly, for this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of mathematical angle MEASUREMENT TEACHING instrument, including the first ruler (1) and semi-circle ruler (4), which is characterized in that described first is straight One end activity of the one end of ruler (1) by the first pin shaft (2) respectively at the positive bottom of semi-circle ruler (4) and third ruler (6) connects It connecing, the other end of first ruler (1) is flexibly connected by the second pin shaft (3) with one end of the second ruler (5), and described second The other end of ruler (5) is flexibly connected by third pin shaft (7) with the other end of third ruler (6), the third ruler (6) The other end is fixedly connected with fixed device (8), and scale strip is carved in the front of first ruler (1) and third ruler (6), and It is carved with angle item in the front of the semi-circle ruler (4).

2. a kind of mathematical angle MEASUREMENT TEACHING instrument according to claim 1, it is characterised in that: fixed device (8) packet It includes cylindrical drum (9), one end of the cylindrical drum (9) is fixedly connected with the other end of third ruler (6), cylindrical drum (9) top It is threaded in the middle part of end the bar that is screwed (11), the other end of the cylindrical drum (9) is symmetrically opened up there are two rectangular channel (10).

3. a kind of mathematical angle MEASUREMENT TEACHING instrument according to claim 1, it is characterised in that: first ruler (1) Top offers placing groove (12), and the placing groove is slightly longer than the second ruler (5).

4. a kind of mathematical angle MEASUREMENT TEACHING instrument according to claim 1, it is characterised in that: first ruler (1), The bottom end of two rulers (5) and third ruler (6) tool is equipped with slip-resistant texture.

5. a kind of mathematical angle MEASUREMENT TEACHING instrument according to claim 1, it is characterised in that: the bottom of the semi-circle ruler (4) End is equipped with link.