CN215244051U - Trigonometric function teaching aid - Google Patents

Abstract

The utility model discloses a trigonometric function teaching aid, which belongs to the technical field of teaching aids, and comprises a cross ruler, wherein a protractor is bonded on the side wall of the cross ruler, scale marks are arranged on the cross ruler and the protractor, a first arc-shaped groove and a second arc-shaped groove are arranged on the protractor, the diameter of the first arc-shaped groove is larger than that of the second arc-shaped groove, a rotating shaft is arranged in the middle of the cross ruler, an adjusting ruler is rotatably connected on the rotating shaft, a mounting hole is arranged on the adjusting ruler, a push-pull rod is slidably connected in the mounting hole, a clamping plate is arranged at the bottom end of the push-pull rod, and a supporting column is arranged at the front end of the adjusting ruler, which is positioned in the mounting hole; the utility model discloses be equipped with the regulation chi on the horizontal scale, adjust the horizontal scale and adjust the angle between the chi through the rotation of adjusting the chi to through the throughput angle ware real-time measurement, can draw the angle fast, make things convenient for the teacher to draw the picture and use, simultaneously through a plurality of draw-in grooves cooperations that are equipped with in cardboard and the second arc wall, can fix the regulation chi, prevent that the later stage teacher from taking place to rock when drawing the regulation chi, make the angle of drawing more accurate.

Description

Trigonometric function teaching aid

Technical Field

The utility model relates to a teaching aid technical field, concretely relates to trigonometric function teaching aid.

Background

The trigonometric function is one of the basic elementary functions, and is a function in which an angle (mathematically, the most common radian system, the same applies hereinafter) is used as an independent variable, and coordinates of the intersection point of an arbitrary angle terminal edge and a unit circle or a ratio thereof corresponding to the angle is used as a dependent variable. And may equally be defined by the length of the various line segments associated with the unit circle. Trigonometric functions play an important role in studying the properties of geometric shapes such as triangles and circles, and are also fundamental mathematical tools for studying periodic phenomena. At present when explaining trigonometric function on mathematical class, the teacher can draw the supplementary understanding of angle and verify on the blackboard usually, but the teacher when drawing the angle, the size of its angle is not good to be adjusted, need cooperate the supplementary drawing angle of square and protractor, it is very inconvenient to operate, and square and protractor need the teacher to press and use on the blackboard, because the blackboard is smooth, rock easily when drawing the angle, the angle that leads to slipping out has the deviation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a trigonometric function teaching aid for solve the problem that faces among the above-mentioned background art.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a trigonometric function teaching aid, includes the horizontal ruler, it has the protractor to adhere on the lateral wall of horizontal ruler, all be equipped with the scale mark on horizontal ruler and the protractor, be equipped with first arc wall and second arc wall on the protractor, the diameter of first arc wall is greater than the diameter of second arc wall, the centre of horizontal ruler is equipped with the pivot, it is connected with the regulation chi to rotate in the pivot, be equipped with the mounting hole on the regulation chi, sliding connection has the push-and-pull rod in the mounting hole, the bottom of push-and-pull rod is equipped with the cardboard, the front end that lies in the mounting hole on the regulation chi is equipped with the support column.

Further, sliding connection has the connection connecting plate between the inner wall both sides of first arc wall, the bottom and the connecting plate fixed connection of support column, the inner wall both sides of second arc wall are equipped with the arc mounting panel, a plurality of draw-in groove has been seted up to the equidistance on the arc mounting panel, the draw-in groove mutually supports with the cardboard.

Furthermore, a first magnetic plate is arranged at the bottom end of the second arc-shaped groove, a second magnetic plate is arranged at the bottom end of the clamping plate, and the first magnetic plate and the second magnetic plate are mutually attracted.

First chutes are symmetrically formed in two ends of the transverse ruler, first telescopic rulers are connected in the first chutes in a sliding mode, second chutes are formed in the top ends of the adjusting rulers, and second telescopic rulers are connected in the second chutes in a sliding mode.

The utility model has the advantages that:

the utility model is provided with the adjusting ruler on the cross ruler, the angle between the cross ruler and the adjusting ruler is adjusted by the rotation of the adjusting ruler, and the angle is measured by the protractor in real time, so that the angle can be drawn quickly, the drawn angle is more accurate, the operation is very simple, and the use of drawing by teachers is convenient; simultaneously through a plurality of draw-in grooves cooperation that are equipped with in cardboard and the second arc wall, can fix the regulation chi, prevent that the later stage teacher from adjusting the chi when drawing and taking place to rock, lead to the angle of drawing to have the deviation with anticipating.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts;

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view of the protractor;

FIG. 3 is a schematic view of the structure of the adjusting ruler;

fig. 4 is a schematic view of the internal structure of the lateral ruler.

The reference numbers in the figures illustrate:

1. a transverse ruler; 2. a protractor; 3. scale lines; 4. a rotating shaft; 5. adjusting the ruler; 6. a first arc-shaped slot; 7. a second arc-shaped slot; 8. mounting holes; 9. a push-pull rod; 10. clamping a plate; 11. a support pillar; 12. a connecting plate; 13. an arc-shaped mounting plate; 14. a card slot; 15. a first magnetic plate; 16. a second magnetic plate; 17. a first chute; 18. a first telescopic rule; 19. a second chute; 20. a second telescopic rule.

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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", and the like, indicate positional or positional relationships, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

A trigonometric function teaching aid is shown in figures 1-4 and comprises a cross ruler 1, wherein a protractor 2 is bonded on the side wall of the cross ruler 1, scale marks 3 are respectively arranged on the cross ruler 1 and the protractor 2, a first arc-shaped groove 6 and a second arc-shaped groove 7 are arranged on the protractor 2, the diameter of the first arc-shaped groove 6 is larger than that of the second arc-shaped groove 7, a rotating shaft 4 is arranged in the middle of the cross ruler 1, an adjusting ruler 5 is rotatably connected on the rotating shaft 4, a mounting hole 8 is arranged on the adjusting ruler 5, a push-pull rod 9 is slidably connected in the mounting hole 8, a clamping plate 10 is arranged at the bottom end of the push-pull rod 9, a supporting column 11 is arranged at the front end of the mounting hole 8 on the adjusting ruler 5, the rotating shaft 4 can drive the adjusting ruler 5 to rotate along the protractor 2, the drawn angle is more accurate through the matching of the adjusting ruler 5 and the cross ruler 1, a connecting plate 12 is slidably connected between the two sides of the inner wall of the first arc-shaped groove 6, the bottom end of the supporting column 11 is fixedly connected with the connecting plate 12, arc-shaped mounting plates 13 are arranged on two sides of the inner wall of the second arc-shaped groove 7, a plurality of clamping grooves 14 are equidistantly formed in the arc-shaped mounting plates 13, the clamping grooves 14 are matched with the clamping plates 10, the adjusting ruler 5 can rotate along the first arc-shaped groove 6 through the matching of the supporting column 11 and the connecting plate 12, the height of the supporting column 11 is the same as the thickness of the transverse ruler 1, two ends of the adjusting ruler 5 can be parallel, a teacher can conveniently operate the drawing, the adjusting ruler 5 can be fixed through the matching of the clamping grooves 14 and the clamping plates 10, the adjusting ruler 5 is prevented from shaking when the teacher draws the drawing, the drawing is prevented from generating errors, the first magnetic plate 15 is arranged at the bottom end of the second arc-shaped groove 7, the second magnetic plate 16 is arranged at the bottom end of the clamping plate 10, the first magnetic plate 15 and the second magnetic plate 16 attract each other, the clamping plates 10 and the clamping grooves 14 can be more stably matched through the first magnetic plate 15 and the second magnetic plate 16, further fix regulation chi 5, first spout 17 has been seted up to the symmetry on the both ends of horizontal ruler 1, sliding connection has first telescopic ruler 18 in first spout 17, second spout 19 has been seted up on the top of regulation chi 5, sliding connection has second telescopic ruler 20 in the second spout 19, the adjustable horizontal ruler 1 of first telescopic ruler 18 and second telescopic ruler 20 that is equipped with and the length of adjusting chi 5, make things convenient for the teacher to draw the triangle of different length, do not need the extension line operation in the later stage, make things convenient for the teacher to use.

Theory of operation, paste this teaching aid on the blackboard, according to the required condition, adjust the length of first telescopic rule 18 and second telescopic rule 20, then rotate and adjust chi 5, make it remove along first arc wall 6, adjust the angle between horizontal ruler 1 and the regulation chi 5, conveniently draw the angle of equidimension not, after the angle is confirmed, push-and-pull rod 9 is moved to the downdraft, cardboard 10 card that is equipped with the bottom is in draw-in groove 14, thereby it is fixed to adjust chi 5, prevent that it from taking place to rock when the teacher draws, cause the drawing inaccuracy, also make more convenience of teacher when drawing.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims (4)

1. The utility model provides a trigonometric function teaching aid, includes horizontal ruler (1), its characterized in that, it has protractor (2) to bond on the lateral wall of horizontal ruler (1), all be equipped with scale mark (3) on horizontal ruler (1) and protractor (2), be equipped with first arc wall (6) and second arc wall (7) on protractor (2), the diameter of first arc wall (6) is greater than the diameter of second arc wall (7), the centre of horizontal ruler (1) is equipped with pivot (4), it is connected with regulation chi (5) to rotate on pivot (4), be equipped with mounting hole (8) on regulation chi (5), sliding connection has push-and-pull rod (9) in mounting hole (8), the bottom of push-and-pull rod (9) is equipped with cardboard (10), the front end that lies in mounting hole (8) on regulation chi (5) is equipped with support column (11).

2. The trigonometric function teaching aid as claimed in claim 1, wherein a connecting plate (12) is slidably connected between two sides of the inner wall of the first arc-shaped groove (6), the bottom end of the supporting column (11) is fixedly connected with the connecting plate (12), two sides of the inner wall of the second arc-shaped groove (7) are provided with arc-shaped mounting plates (13), the arc-shaped mounting plates (13) are equidistantly provided with a plurality of clamping grooves (14), and the clamping grooves (14) are matched with the clamping plates (10).

3. A trigonometric function teaching aid according to claim 2, wherein a first magnetic plate (15) is arranged at the bottom end of the second arc-shaped groove (7), a second magnetic plate (16) is arranged at the bottom end of the clamping plate (10), and the first magnetic plate (15) and the second magnetic plate (16) attract each other.

4. The trigonometric function teaching aid as claimed in claim 1, wherein the two ends of the cross bar (1) are symmetrically provided with first sliding grooves (17), the first sliding grooves (17) are connected with a first telescopic ruler (18) in a sliding manner, the top end of the adjusting ruler (5) is provided with a second sliding groove (19), and the second sliding grooves (19) are connected with a second telescopic ruler (20) in a sliding manner.

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