CN215220015U

CN215220015U - Parallelogram nature is explored and exercise explanation teaching aid

Info

Publication number: CN215220015U
Application number: CN202121270522.5U
Authority: CN
Inventors: 柳贺; 刘冬
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2021-12-17
Anticipated expiration: 2031-06-08

Abstract

The utility model belongs to the technical field of teaching aid technique and specifically relates to a parallelogram nature is explored and problem explanation teaching aid is disclosed, including the compoboard, the compoboard is total four, four the compoboard is together fixed through four fixed pins, compoboard front surface edge engraves there is first scale mark, there is a fixed pinhole along length direction evenly distributed on the compoboard line, compoboard rear surface inlays and has the magnetic adsorption body, the fixed pin includes spacing separation blade. Has the advantages that: 1. when in use, the blackboard eraser can be adsorbed on a blackboard (a white board) without being held by hands all the time, and is simple and convenient; 2. the device can be randomly combined and changed into parallelograms with different sizes, can also be used for explaining geometrical structures such as triangles and trapezoids, and has wide application range; 3. the auxiliary tools such as the protractor and the like are simple and convenient to install and use, and have good use effect; 4. teaching is more directly perceived, can improve the student and know the speed of knowledge, improves the teaching effect.

Description

Parallelogram nature is explored and exercise explanation teaching aid

Technical Field

The utility model belongs to the technical field of teaching aid technique and specifically relates to a parallelogram nature is explored and exercise explanation teaching aid is related to.

Background

The teaching aid is a model, a real object, a specimen, an instrument, a chart, a slide show and the like for explaining something, and comprises teaching equipment, a teaching instrument, practical training equipment, education equipment, experimental equipment, a teaching specimen, a teaching model and the like.

The research results of educational psychology show that students must convert the observation and contact of specific things into the perceptual knowledge irrelevant to the specific things and then convert the perceptual knowledge into abstract and generalized rational knowledge by means of sense in the initial stage of knowledge formation. The teaching aid is used as a teaching aid for teachers, has the irreplaceable effect of other means, enables students to understand teaching contents more visually and vividly, can mobilize the learning enthusiasm of the students, improves the learning interest of the students, enriches the perceptual cognition of the students, helps the students form clear concepts, and simultaneously cultivates the observation ability and the abstract thinking ability of the students.

In the mathematical education, the reasonable use of the teaching aid is an important way for improving the quality of primary school mathematical education. The students are placed in the main positions, the processes and inducements of the thinking elicitations of the students are grasped, wide thinking space and intelligence background are created, demonstration, operation and test opportunities are provided for the students as much as possible, the multidirectional thinking ability and the reverse thinking ability of the students are cultured, and the thinking ability and the creating ability of the students are developed greatly.

The existing parallelogram teaching aid is simple in structure, only has a quadrilateral structure formed by fixing four plates together, is poor in using effect during teaching, and is not intuitive.

SUMMERY OF THE UTILITY MODEL

The utility model provides a teaching aid for parallelogram nature exploration and exercise explanation to solve the above problems.

The technical scheme of the utility model is realized like this:

the parallelogram nature exploration and problem explanation teaching aid comprises four combined plates, wherein the four combined plates are fixed together through four fixing pins, a first scale mark is engraved on the edge of the front surface of each combined plate, a row of fixing pin holes are uniformly distributed on the middle line of each combined plate along the length direction, a magnetic adsorption body is embedded on the rear surface of each combined plate, each fixing pin comprises a limiting blocking piece, two short pin shafts are symmetrically formed on two sides of each limiting blocking piece, the diameter of each short pin shaft is the same as that of each fixing pin hole, and the length of each short pin shaft is 1.5-2 times of the depth of each fixing pin hole.

Furthermore, the graduation unit of the first scale mark is 1mm, the distance between the fixing pin holes is 10mm, and each fixing pin hole corresponds to the centimeter graduation line of the first scale mark.

Further, the device also comprises a protractor which is fixed on one of the fixing pins.

Further, the protractor includes first support arm, second support arm and connecting axle sleeve, connecting axle sleeve central authorities shaping have with the through-hole that the stub axle diameter matches, first support arm the one end nestification of second support arm is in the outside both ends of connecting axle sleeve, the shaping of first support arm other end tip has the arc piece, the shaping has the arc spacing groove on the arc piece, first support arm lower surface is close to the position shaping of arc piece has first baffle, the shaping of second support arm other end tip below have with arc spacing groove sliding fit's sliding pin, second support arm tip is close to the position shaping of sliding pin has the second baffle.

Further, the nested torsional spring that has on the connecting axle sleeve outer wall, the torsional spring is located first support arm with between the second support arm, the shaping is buckled at the both ends of torsional spring has and can hang respectively first support arm first couple on the second support arm lateral wall.

Further, the included angle between the first support arm and the second support arm is 0-180 degrees.

Furthermore, the combined plate further comprises an X-shaped connecting rod, and the X-shaped connecting rod is fixed on a diagonal line of a parallelogram formed by the combined plates.

Furthermore, the X-shaped connecting rod comprises two connecting rods which are connected together in a pin joint mode, the width and the thickness of each connecting rod are the same as those of the combined plate, a central hole is formed in the center of each connecting rod, two straight sliding grooves are symmetrically formed in the two ends of each connecting rod, and the width of each straight sliding groove is matched with the diameter of the corresponding short pin shaft.

Furthermore, two second scale marks are engraved on the edge of the front surface of the connecting rod, and starting points of the two second scale marks are symmetrically distributed on two sides of the central hole and are arranged close to the central hole.

By adopting the technical scheme, the beneficial effects of the utility model are that:

1. when in use, the blackboard eraser can be adsorbed on a blackboard (a white board) without being held by hands all the time, and is simple and convenient;

2. the device can be randomly combined and changed into parallelograms with different sizes, can also be used for explaining geometrical structures such as triangles and trapezoids, and has wide application range;

3. the auxiliary tools such as the protractor and the like are simple and convenient to install and use, and have good use effect;

4. teaching is more directly perceived, can improve the student and know the speed of knowledge, improves the teaching effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a first usage effect reference diagram of the present invention;

fig. 2 is a second usage effect reference diagram of the present invention;

fig. 3 is a third usage effect reference diagram of the present invention;

FIG. 4 is a front view of the composite board of the present invention;

FIG. 5 is a rear view of the composite board of the present invention;

FIG. 6 is a schematic view of the fixing pin structure of the present invention;

fig. 7 is a front view of the protractor of the present invention;

fig. 8 is a plan view of the protractor of the present invention;

FIG. 9 is a schematic view of an X-shaped connecting rod structure of the present invention;

fig. 10 is a front view of the connecting rod of the present invention.

The reference numerals are explained below:

1. a composition board; 11. a fixing pin hole; 12. a first scale mark; 13. a magnetic adsorbent; 2. a fixing pin; 21. a limiting baffle plate; 22. a short pin shaft; 3. a protractor; 31. a first support arm; 32. a torsion spring; 33. connecting the shaft sleeve; 34. a second support arm; 35. an arc-shaped limiting groove; 36. arc sheets; 37. a first baffle plate; 38. a second baffle; 39. a slide pin; 4. an X-shaped connecting rod; 41. a connecting rod; 42. a central bore; 43. a straight chute; 44. a second tick mark.

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 efforts belong to the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1, 4, 5 and 6, the teaching aid for researching the properties of the parallelogram and explaining the problems comprises a composition board 1, wherein the composition board 1 comprises four composition boards 1, the four composition boards 1 are fixed together through four fixing pins 2 and can be spliced to form a quadrangle or a triangle, a first scale mark 12 is engraved on the edge of the front surface of the composition board 1 and can be used as a ruler, a row of fixing pin holes 11 are uniformly distributed on the middle line of the composition board 1 along the length direction, a magnetic adsorption body 13 is embedded on the rear surface of the composition board 1, so that the composition board 1 can be conveniently adsorbed on a blackboard or a whiteboard to be used without being held by a teacher in the teaching process, the fixing pins 2 comprise limiting blocking pieces 21, two short pin shafts 22 are symmetrically formed on two sides of the limiting blocking pieces 21, the teaching aid can be installed on the two short pin shafts 22, the diameters of the short pin shafts 22 are the same as the diameters of the fixing pin holes 11, the lengths of the short pin shafts 22 are 1.5-2 times of the depths of the fixing pin holes 11, two combined plates 1 can be fixed on one short pin shaft 22.

In this embodiment, the graduation unit of first scale mark 12 is 1mm, and the interval of fixed pinhole 11 is 10mm, and every fixed pinhole 11 corresponds the centimetre scale mark of first scale mark 12, conveniently carries out the definite size, and polylith compoboard 1 can splice into rectangular shape moreover, increases measurable length.

Example two:

as shown in fig. 2, 7 and 8, the content of the present embodiment is substantially the same as that of the first embodiment, except that:

in the embodiment, the protractor further comprises a protractor 3, the protractor 3 is fixed on one of the fixing pins 2, the protractor 3 comprises a first support arm 31, a second support arm 34 and a connecting shaft sleeve 33, a through hole matched with the short pin shaft 22 in diameter is formed in the center of the connecting shaft sleeve 33, one end of each of the first support arm 31 and the second support arm 34 is nested at two ends of the outside of the connecting shaft sleeve 33, the first support arm 31 and the second support arm 34 can rotate freely by taking the connecting shaft sleeve 33 as a central shaft, an arc piece 36 is formed at the end part of the other end of the first support arm 31, an arc limiting groove 35 is formed on the arc piece 36, angle measurement scales are formed on the surface of the arc piece 36 along the arc limiting groove 35, a first baffle 37 is formed at a position, close to the arc piece 36, on the lower surface of the first support arm 31, a sliding pin 39 in sliding fit with the arc limiting groove 35 is formed below the other end of the second support arm 34, a second stop plate 38 is formed at the end of the second arm 34 near the sliding pin 39 for limiting the position of the second arm 34, and the sliding pin 39 slides in the arc-shaped limiting groove 35 to drive the second arm 34 to rotate along the arc-shaped limiting groove 35 for angle measurement.

In this embodiment, the torsion spring 32 is nested on the outer wall of the connecting shaft sleeve 33, the torsion spring 32 is located between the first support arm 31 and the second support arm 34, hooks which can be respectively hooked on the side walls of the first support arm 31 and the second support arm 34 are formed by bending two ends of the torsion spring 32, and after the connecting shaft sleeve 33 is nested on the short pin shaft 22, the first support arm 31 and the second support arm 34 can be automatically separated to abut against the inner side walls of the two combination plates 1 under the action of the elastic force of the torsion spring 32 to measure the angle.

In this embodiment, the included angle between the first arm 31 and the second arm 34 is 0-180 °, and obtuse angle and acute angle measurements can be performed.

Example three:

as shown in fig. 3, 9 and 10, the present embodiment is substantially the same as the first and second embodiments, except that:

in this embodiment, still include X type connecting rod 4, X type connecting rod 4 is fixed on the parallelogram diagonal that compoboard 1 formed, X type connecting rod 4 includes two pin joint connecting rods 41 together, connecting rod 41 adopts fixed pin 2 to articulate together equally, the width of connecting rod 41, thickness and compoboard 1's width, thickness are the same, connecting rod 41 central shaping has centre bore 42, connecting rod 41 both ends symmetry shaping has two straight chutes 43, the width of straight chute 43 matches with the diameter of short pin axle 22, short pin axle 22 slidable mounting on the fixed pin 2 of parallelogram four corners is in straight chute 43 when using, accomplish the fixed of X type connecting rod 4.

In the embodiment, the edge of the front surface of the connecting rod 41 is engraved with two second scale lines 44, and the starting points of the two second scale lines 44 are symmetrically distributed on two sides of the central hole 42 and are arranged close to the central hole 42, so that the distance from the central hole 42 to the corner of the quadrangle can be conveniently measured, and whether the diagonal line is halved or not can be judged.

The utility model discloses a theory of operation does: when the combined angle gauge is used, a teacher adsorbs two combined plates 1 on a blackboard (white board), then the position is adjusted, the other two combined plates 1 are fixed with the two combined plates 1 fixed on the blackboard (white board) by using a fixing pin 2, the four combined plates 1 can be combined into a rectangle, a parallelogram, a square or a rhombus by controlling the position of the fixing pin 2, after a protractor 3 is clamped on one fixing pin 2, a first baffle 37 and a second baffle 38 are respectively abutted against the inner sides of the edges of the two combined plates 1, angle measurement scales are engraved on an arc sheet 36 along an arc limiting groove 35, the included angle of the two combined plates 1 at the position of the protractor 3 is confirmed by observing the position of a second support arm 34, then the angles of other included angles can be known according to the properties of the parallelogram, and the protractor 3 can be installed at the corresponding included angle position for measurement and verification, meanwhile, the X-shaped connecting rod 4 can be installed on a parallelogram or a rhombus to ensure that the four fixing pins 2 are respectively clamped in the four straight sliding grooves 43, and then the characteristics of mutual bisection of diagonals, mutual perpendicularity of rhombus diagonals and the like are verified by recording the distance between the fixing pins 2 and the central hole 42 or measuring the included angle of the two connecting rods 41 by using the protractor 3.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a parallelogram nature is explored and problem explanation teaching aid which characterized in that: the combined plate comprises combined plates (1), the combined plates (1) are four in number, the four combined plates (1) are fixed together through four fixing pins (2), first scale marks (12) are engraved on the edge of the front surface of the combined plate (1), a row of fixing pin holes (11) are uniformly distributed on the middle line of the combined plate (1) along the length direction, a magnetic adsorption body (13) is embedded on the rear surface of the combined plate (1), the fixing pins (2) comprise limiting blocking pieces (21), two short pin shafts (22) are symmetrically formed on two sides of each limiting blocking piece (21), the diameters of the short pin shafts (22) are the same as those of the fixing pin holes (11), and the lengths of the short pin shafts (22) are 1.5-2 times of the depth of the fixing pin holes (11).

2. The parallelogram nature exploration and exercise interpretation teaching aid of claim 1, wherein: the graduation unit of the first scale mark (12) is 1mm, the distance between the fixing pin holes (11) is 10mm, and each fixing pin hole (11) corresponds to the centimeter graduation line of the first scale mark (12).

3. The parallelogram nature exploration and exercise interpretation teaching aid of claim 1, wherein: the angle gauge further comprises an angle gauge (3), and the angle gauge (3) is fixed on one of the fixing pins (2).

4. The parallelogram nature exploration and exercise interpretation teaching aid of claim 3, wherein: the protractor (3) comprises a first support arm (31), a second support arm (34) and a connecting shaft sleeve (33), a through hole matched with the diameter of the short pin shaft (22) is formed in the center of the connecting shaft sleeve (33), one end of the first support arm (31) and one end of the second support arm (34) are nested at the two outer ends of the connecting shaft sleeve (33), an arc sheet (36) is formed at the end part of the other end of the first support arm (31), an arc limiting groove (35) is formed on the arc sheet (36), a first baffle (37) is formed on the lower surface of the first supporting arm (31) at a position close to the circular arc piece (36), a sliding pin (39) which is in sliding fit with the arc-shaped limiting groove (35) is formed below the end part of the other end of the second support arm (34), and a second baffle plate (38) is formed at the end part of the second support arm (34) close to the sliding pin (39).

5. The parallelogram nature exploration and exercise interpretation teaching aid of claim 4, wherein: connect axle sleeve (33) outer wall on the nested torsional spring (32), torsional spring (32) are located first support arm (31) with between second support arm (34), the shaping is bent at the both ends of torsional spring (32) has the hook that can hook respectively and hang first support arm (31) on the second support arm (34) lateral wall.

6. The parallelogram nature exploration and exercise interpretation teaching aid of claim 5, wherein: the included angle between the first support arm (31) and the second support arm (34) is 0-180 degrees.

7. The parallelogram nature exploration and exercise interpretation teaching aid of claim 1, wherein: the combined plate is characterized by further comprising an X-shaped connecting rod (4), wherein the X-shaped connecting rod (4) is fixed on a diagonal line of a parallelogram formed by the combined plate (1).

8. The parallelogram nature exploration and exercise interpretation teaching aid of claim 7, wherein: the X-shaped connecting rod (4) comprises two connecting rods (41) which are connected together in a pin joint mode, the width and the thickness of each connecting rod (41) are the same as those of the combined plate (1), a central hole (42) is formed in the center of each connecting rod (41), two straight sliding grooves (43) are symmetrically formed in two ends of each connecting rod (41), and the width of each straight sliding groove (43) is matched with the diameter of each short pin shaft (22).

9. The parallelogram nature exploration and exercise interpretation teaching aid of claim 8, wherein: two second scale marks (44) are engraved on the edge of the front surface of the connecting rod (41), and the starting points of the two second scale marks (44) are symmetrically distributed on two sides of the central hole (42) and are arranged close to the central hole (42).