CN220250873U - Combined protractor - Google Patents

Abstract

The utility model discloses a combined protractor, which belongs to the technical field of measuring tools and comprises a measuring body, a first auxiliary assembly and a second auxiliary assembly, wherein scales are arranged on the measuring body; the first auxiliary assembly is rotationally connected with the measuring body and is arranged on one side of the measuring body, and the plane of the first auxiliary assembly is perpendicular to the plane of the measuring body and is used for measuring an included angle formed by any two different-plane straight lines; the second auxiliary assembly is rotationally connected with the measuring body and is arranged on the other side of the measuring body, the plane where the second auxiliary assembly is positioned is parallel to the plane where the measuring body is positioned, and the second auxiliary assembly is used for measuring an included angle between two straight lines where extension lines intersect. The combined protractor provided by the utility model solves the problems of small application range, large application limitation and incapability of meeting the application requirements of various learning stages in the prior art. The utility model has simple structure and obvious action effect, and is suitable for wide popularization.

Description

Combined protractor

Technical Field

The utility model relates to the technical field of measuring tools, in particular to a combined protractor.

Background

In the primary school stage, students know angles and learn the angle measuring device angle, so that the students further learn the angle concept and angle calculation, and for the condition that the actual measurement can be realized only after extension, auxiliary lines are needed for auxiliary measurement, and the structure cannot be directly obtained; in addition, around the knowledge and calculation of the angle, the transition from planar geometry to solid geometry is carried out, and the calculation of the angle formed by two different-plane straight lines appears, wherein how to find the required angle is a serious difficulty in teaching which needs to be solved.

The common protractor has a narrow application range, can only be suitable for the knowledge of angles in the primary school stage, and has no ability to calculate the angles after entering the primary school, especially the category of solid geometry. How to enable students to calculate the degrees of different angles through an analytic method (algebraic calculation), and intuitively demonstrate the inherent logic of various angle generation and the like.

Disclosure of Invention

Aiming at the defects, the utility model provides a combined protractor to solve the problems of small application range, large application limitation and incapability of meeting the application requirements of each learning stage in the prior art.

The utility model provides a combined protractor, comprising:

the measuring body is provided with scales;

the first auxiliary component is rotationally connected with the measuring body and is arranged on one side of the measuring body, and the plane of the first auxiliary component is perpendicular to the plane of the measuring body and is used for measuring an included angle formed by any two different-plane straight lines;

the second auxiliary assembly is rotationally connected with the measuring body and is arranged on the other side of the measuring body, and the plane where the second auxiliary assembly is arranged is parallel to the plane where the measuring body is arranged and is used for measuring the included angle between two straight lines where extension lines intersect.

Preferably, the first auxiliary assembly includes:

the first indicator is rotationally connected with the measuring body and is parallel to the measuring body;

a first alignment member parallel to the first indicator member;

the first connecting piece, simultaneously with first indicating piece with first alignment piece rotates to be connected, first connecting piece is equipped with two, two first connecting piece first indicating piece with first alignment piece connects the back and constitutes parallelogram structure, two first connecting piece first indicating piece with first alignment piece combination's plane with it is perpendicular to measure the body.

Preferably, the second auxiliary assembly includes:

the second indicator is rotationally connected with the measuring body;

the second alignment piece is rotationally connected with the measuring body and is parallel to the second indicator;

the second connecting piece is arranged between the second indicating piece and the second aligning piece and is simultaneously connected with the second indicating piece and the second aligning piece in a rotating mode, a plane formed by combining the second indicating piece, the second aligning piece and the second connecting piece is parallel to the plane where the measuring body is located, a connecting point between the second indicating piece and the measuring body is a first turning point, a connecting point between the second aligning piece and the measuring body is a second turning point, a connecting line between the first turning point and the second turning point is a first reference line, and the second connecting piece is parallel to the first reference line.

Preferably, the measuring device further comprises a third auxiliary piece connected with the second auxiliary component, the third auxiliary piece is perpendicular to the measuring body, a connecting point between the second connecting piece and the second aligning piece is a third turning point, and the third auxiliary piece is arranged at a position corresponding to the third turning point on the second connecting piece and is used for measuring a plane angle of a dihedral angle formed by two intersecting half planes.

Preferably, the second indicator is in a strip structure, and a mounting column matched with the measuring body is arranged on the second indicator, and the mounting column is detachably connected with the measuring body and penetrates through the measuring body to be connected with the first indicator.

Preferably, the measuring body is of a semicircular structure made of transparent materials, and the scales are arranged on the measuring body in a semicircular shape; one end of the second indicating piece far away from the second connecting piece is matched with the scale and used for reading an angle indication obtained through measurement of the second auxiliary component; the mounting column is arranged at the position of the circle center of the scale.

Preferably, the first indicator is in a strip structure, the length of the first indicator is greater than the radius of the measuring body, and the first indicator is used for reading the angle indication obtained by measuring the first auxiliary component.

Preferably, the first indicator, the two first connectors and the first alignment member are provided with protrusions for facilitating alignment.

Preferably, the first indicator is provided with a first mounting hole detachably connected with the mounting column, the first mounting hole is a cylindrical hole, the first indicator is perpendicular to the corresponding bump, and a rotating shaft of the first mounting hole is located on the surface, connected with the corresponding bump, of the first indicator.

Preferably, the third auxiliary piece is in a strip-shaped structure; or the third auxiliary element is a wire.

According to the scheme, the combined angle measuring device is used for measuring angles formed by two non-intersecting straight lines in life, for example, the angle of the non-intersecting edge clamps of two sides of a building, particularly in teaching of related angles in classroom teaching, students can intuitively find the required angles, and the degrees of the angles can be measured quickly, and the combined angle measuring device is modified based on the original common angle measuring device. The device helps students directly acquire the angle between two straight lines intersecting with each other through the cooperation between the second auxiliary assembly and the measuring body, so that the students are assisted to learn and know the related knowledge of the extension lines, and the angle readings can be directly acquired, so that the teaching process is more visual and simple; through the cooperation between the first auxiliary component and the measuring body, the student is helped to find the position of an angle (different-face angle) formed by the different-face straight line, and the degree of the angle can be measured; meanwhile, the device can also be used as a demonstration tool for different-plane straight lines for assisting in teaching, and training students to further establish spatial third dimension. The utility model solves the problems of small application range, large application limitation and incapability of meeting the application requirements of each learning stage in the prior art, has simple structure and remarkable action effect, and is suitable for wide popularization.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a combined protractor according to the present utility model;

FIG. 2 is a schematic view of the bottom view of a combination protractor according to the present utility model;

FIG. 3 is a schematic view of a second auxiliary assembly of a combination protractor according to the present utility model;

FIG. 4 is a schematic view of a first auxiliary assembly of a combination protractor according to the present utility model;

FIG. 5 is an enlarged schematic view of the structure shown at A in FIG. 3;

FIG. 6 is a schematic view of the combined protractor for measuring the straight line of different planes;

FIG. 7 is a schematic view of a combined protractor according to the present utility model when two surfaces are intersected;

fig. 8 is a schematic structural diagram of the combined protractor provided by the utility model when the extension lines are measured to intersect straight lines.

In fig. 1-8:

1. a measuring body; 2. a first auxiliary component; 3. a second auxiliary component; 4. a third auxiliary member; 21. a first indicator; 22. a first alignment member; 23. a first connector; 24. a bump; 31. a second indicator; 32. a second alignment member; 33. a second connector; 34. a mounting column; 35. a limiting piece; 211. a first mounting hole; 311. a reading tank; 341. a limit groove; 342. and a first mounting buckle.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 8, a specific embodiment of a combined protractor according to the present utility model will now be described. The combined protractor comprises a measuring body 1, a first auxiliary component 2 and a second auxiliary component 3, wherein the measuring body 1 is provided with scales; the first auxiliary assembly 2 is rotationally connected with the measuring body 1 and is arranged on one side of the measuring body 1, and the plane of the first auxiliary assembly 2 is perpendicular to the plane of the measuring body 1 and is used for measuring an included angle formed by any two different-plane straight lines and demonstrating the position relationship of any two different-plane straight lines; the second auxiliary assembly 3 is rotatably connected with the measuring body 1 and is arranged on the other side of the measuring body 1, and a plane where the second auxiliary assembly 3 is arranged is parallel to the plane where the measuring body 1 is arranged and is used for measuring an included angle between two straight lines where extension lines intersect.

In this embodiment, the device further includes a third auxiliary member 4 connected to the second auxiliary member 3, where the third auxiliary member 4 is perpendicular to the measuring body 1, a connection point between the second connecting member 33 of the second auxiliary member 3 and the second aligning member 32 of the second auxiliary member 3 is a third turning point, and the third auxiliary member 4 is disposed at a position corresponding to the third turning point on the second connecting member 33. The third auxiliary piece 4 is matched with the second auxiliary component 3 and the measuring body 1 to measure the plane angle of the dihedral angle formed by the two intersected half planes, when in use, the intersection line of the third auxiliary piece 4 and the two planes is overlapped, the second auxiliary component 3 is adjusted to be abutted with the two planes, and then the reading and the indication are needed.

In this embodiment, the measuring body 1 is a semicircular structure made of transparent material, and the scale is arranged on the measuring body 1 in a semicircular shape, that is, the measuring body 1 may be a structure of a common semicircular protractor; the third auxiliary element 4 is a strip-like structure, and the third auxiliary element 4 is, illustratively, a wire. It is within the scope of the present document to achieve the above-described performance effects of the measuring body 1 and the third auxiliary element 4.

For convenience of explanation, referring to fig. 1, with any point in space as an origin, the setting direction of the third auxiliary member 4 as a Z axis, the setting direction of the second indicator 31 of the second auxiliary member 3 relative to the second alignment member 32 as an X axis, and the straight line direction perpendicular to the X axis and the Z axis at the same time as a Y axis, a rectangular coordinate system is established, wherein the XY plane is a horizontal plane, the direction indicated on the horizontal plane is a horizontal direction, and the direction indicated on the Z axis is a vertical direction.

Compared with the prior art, the combined protractor can complete the full-line measurement of the angle formed by the straight line and the straight line vertical-different plane straight line at the middle and high stage. Moreover, the measurement method is consistent with the problem solving internal logic of the example problems in the textbook, and the tight combination of abstract logic thinking and concrete image thinking can be satisfactorily realized. Through the cooperation between the second auxiliary assembly 3 and the measuring body 1, the student is helped to directly acquire the angle between two straight lines intersecting with each other by the extension line, on one hand, the student is helped to learn and know the related knowledge of the extension line, on the other hand, the angle indication can be directly acquired, and the teaching process is more visual and simple; through the cooperation between the first auxiliary component 2 and the measuring body 1, students are helped to find the position of an angle (different-face angle) formed by different-face straight lines, and the degree of the angle can be measured; meanwhile, the position relation of any two different straight lines can be demonstrated, and students are trained to further build spatial third dimension.

As another embodiment of the utility model, the structure of such a combination protractor is substantially the same as that of the above-described example, except that the first auxiliary assembly 2 comprises a first indicator 21, a first alignment member 22, a first connecting member 23, wherein the first indicator 21 is rotatably connected to the measuring body 1 and is parallel to the measuring body 1; the first alignment member 22 is parallel to the first indicator member 21; the first connecting piece 23 is simultaneously connected with the first indicating piece 21 and the first aligning piece 22 in a rotating way, two first connecting pieces 23 are arranged, the two first connecting pieces 23, the first indicating piece 21 and the first aligning piece 22 are connected to form a parallelogram structure, and the plane formed by combining the two first connecting pieces 23, the first indicating piece 21 and the first aligning piece 22 is perpendicular to the measuring body 1.

In this embodiment, the first indicator 21, the first connector 23 and the first alignment member 22 are all in a strip structure, the length of the first indicator 21 is greater than the radius of the measuring body 1, and the first indicator 21 is used for reading the angle indication obtained by measuring the first auxiliary component 2. The first indicator 21, the two first connectors 23 and the first alignment member 22 are provided with protrusions 24 for facilitating alignment.

As another embodiment of the utility model, the structure of such a combination protractor is substantially the same as that of the above-described example, with the difference that the second auxiliary assembly 3 comprises a second indicator 31, a second alignment member 32, a second connecting member 33, wherein the second indicator 31 is in rotational connection with the measuring body 1; the second alignment member 32 is rotatably connected with the measuring body 1 and is parallel to the second indicator member 31; the second connecting piece 33 is disposed between the second indicator 31 and the second alignment piece 32, and is connected with the second indicator 31 and the second alignment piece 32 in a rotating manner, a plane formed by combining the second indicator 31, the second alignment piece 32 and the second connecting piece 33 is parallel to the plane where the measuring body 1 is located, a connection point between the second indicator 31 and the measuring body 1 is a first turning point, a connection point between the second alignment piece 32 and the measuring body 1 is a second turning point, a connection line between the first turning point and the second turning point is a first reference line, and the second connecting piece 33 is parallel to the first reference line.

In this embodiment, the second indicator 31, the second alignment member 32 and the second connector 33 are all in a strip structure, the second indicator 31 is provided with a mounting post 34 adapted to the measuring body 1, and the mounting post 34 is detachably connected to the measuring body 1 and penetrates through the measuring body 1 to be connected to the first indicator 21. The second indicator 31, the second alignment element 32, the second connector 33 and the measuring body 1 form a parallelogram structure. The mounting post 34 may be disposed at an intermediate position of the second indicator 31 and integrally formed with the second indicator 31.

In the present embodiment, the end of the second indicator 31 remote from the second connector 33 is adapted to the scale for reading the angular reading obtained by the measurement of the second auxiliary assembly 3; the mounting column 34 is arranged at the circle center of the scale, the second indicator 31 is provided with a reading groove 311, and the reading groove 311 is positioned on the symmetry axis of the second indicator 31 along the length direction and is arranged at one side of the mounting column 34 far away from the second connector 33, so as to ensure the accuracy of the indication number after measurement.

In this embodiment, the first indicator 21 is provided with a first mounting hole 211 detachably connected to the mounting post 34, the first mounting hole 211 is a cylindrical hole, the first indicator 21 is perpendicular to the corresponding bump 24, the rotation axis of the first mounting hole 211 is located on the surface of the first indicator 21 connected to the corresponding bump 24, the surface of the first indicator 21 connected to the corresponding bump 24 is a reading reference surface, when in use, the first indicator 21 is synchronously rotated according to the position of the first alignment member 22, finally the corresponding indication of the reading reference surface is a corresponding angle, and the coplanar arrangement of the rotation axis of the first mounting hole 211 and the reading reference surface is used for conveniently and directly reading the indication, and the thickness of the surface structure leads to a reading error.

Compared with the prior art, the device is provided with two parallelogram structures based on a conventional protractor, and the constitution and the actual measurement degree of angles are intuitively demonstrated by virtue of the equivalent substitution operation by utilizing the property of the parallelogram; visually demonstrating the actual measurement process of the plane angle of the dihedral angle; through visual demonstration of definition of angles formed by interpretation of different-plane straight lines, a great visual demonstration function can be exerted, the position relation of any two different-plane straight lines can be visually demonstrated, the accuracy of calculation data can be verified, the relation of translation and analysis can also be visually demonstrated, the specific visual thinking ability of students is further enhanced, meanwhile, the abstract thinking ability of the students is trained, and the effect of helping the students to establish spatial thinking is very obvious.

As another embodiment of the present utility model, the structure of the combined protractor is basically the same as that of the above embodiment, and the difference is that the mounting post 34 is provided with a limit groove 341, the limit groove 341 is provided with a limit piece 35 engaged with the measuring body 1, and the limit piece 35 is arranged at one side of the measuring body 1 away from the second indicator 31 for limiting the second indicator 31; the end of the mounting post 34 away from the second indicator 31 is provided with a first mounting buckle 342, and the first mounting hole 211 is engaged with the first mounting buckle 342. The structures of the first mounting buckle 342 and the first mounting hole 211 are not described in the prior art, as long as the structures capable of realizing the function of the detachable connection of the first mounting buckle 342 and the first mounting hole 211 are all within the scope of protection of the present application.

In this embodiment, the third auxiliary member 4 is rotatably connected to the second connecting member 33, the second connecting member 33 is provided with a receiving groove for receiving the third auxiliary member 4, and a limit button engaged with the third auxiliary member 4 is disposed in the receiving groove; the third auxiliary piece 4 comprises an outer cylinder, a middle cylinder and an inner cylinder, the outer cylinder, the middle cylinder and the inner cylinder are all in a round table-shaped cylindrical structure, and one end of the outer cylinder, which is far away from the middle cylinder, is in a hemispherical structure and is rotationally connected with the second connecting piece 33; the middle cylinder is arranged in the outer cylinder and is in sliding connection with the outer cylinder; the inner cylinder is arranged in the middle cylinder and is in sliding connection with the middle cylinder; the height of the middle cylinder is larger than that of the outer cylinder and smaller than that of the inner cylinder. The structure of the third auxiliary piece 4 and the second connecting piece 33 is convenient for the storage of the third auxiliary piece 4, and the interference between the third auxiliary piece 4 and the rest structure in the using process is avoided, so that the using process is smoother and more convenient. It is to be understood that the terms "length," "width," "upper," "lower," "left," "right," "vertical," "horizontal," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other. What is not described in detail in the embodiments of the present utility model belongs to the prior art known to those skilled in the art.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A combination protractor, comprising:

the measuring body (1) is provided with scales;

the first auxiliary assembly (2) is rotationally connected with the measuring body (1) and is arranged on one side of the measuring body (1), and the plane of the first auxiliary assembly (2) is perpendicular to the plane of the measuring body (1) and is used for measuring an included angle formed by any two different-plane straight lines;

the second auxiliary assembly (3) is rotationally connected with the measuring body (1) and is arranged on the other side of the measuring body (1), and the plane of the second auxiliary assembly (3) is parallel to the plane of the measuring body (1) and is used for measuring an included angle between two straight lines intersecting with the extension line.

2. A combination protractor according to claim 1, wherein the first auxiliary assembly (2) comprises:

a first indicator (21) rotatably connected to the measuring body (1) and parallel to the measuring body (1);

a first alignment member (22) parallel to the first indicator member (21);

the first connecting piece (23), simultaneously with first indicator piece (21) with first alignment piece (22) rotates to be connected, first connector piece (23) are equipped with two, two first connector piece (23) first indicator piece (21) with first alignment piece (22) are connected the back and are constituteed parallelogram structure, two first connector piece (23) first indicator piece (21) with first alignment piece (22) combination's plane with measurement body (1) are perpendicular.

3. A combination protractor according to claim 2, wherein the second auxiliary assembly (3) comprises:

a second indicator (31) rotatably connected to the measuring body (1);

a second alignment element (32) which is rotationally connected to the measuring body (1) and is parallel to the second indicator element (31);

the second connecting piece (33) is arranged between the second indicating piece (31) and the second aligning piece (32) and is simultaneously connected with the second indicating piece (31) and the second aligning piece (32) in a rotating mode, a plane formed by combining the second indicating piece (31), the second aligning piece (32) and the second connecting piece (33) is parallel to the plane where the measuring body (1) is located, a connecting point between the second indicating piece (31) and the measuring body (1) is a first turning point, a connecting point between the second aligning piece (32) and the measuring body (1) is a second turning point, a connecting line between the first turning point and the second turning point is a first reference line, and the second connecting piece (33) is parallel to the first reference line.

4. A combination protractor according to claim 3, further comprising a third auxiliary member (4) connected to the second auxiliary member (3), the third auxiliary member (4) being perpendicular to the measuring body (1), the connection point between the second connecting member (33) and the second aligning member (32) being a third point, the third auxiliary member (4) being arranged on the second connecting member (33) in a position corresponding to the third point for measuring the dihedral angle formed by the two intersecting half planes.

5. The combined protractor according to claim 4, wherein the second indicator (31) has a strip-shaped structure, a mounting post (34) adapted to the measuring body (1) is provided on the second indicator (31), and the mounting post (34) is detachably connected to the measuring body (1) and penetrates through the measuring body (1) to be connected to the first indicator (21).

6. The combined protractor according to claim 5, wherein the measuring body (1) is a semicircular structure made of transparent material, and the graduations are arranged on the measuring body (1) in a semicircular shape; the end of the second indicator (31) far away from the second connecting piece (33) is matched with the scale and is used for reading an angle indication obtained by measurement of the second auxiliary assembly (3); the mounting column (34) is arranged at the position of the circle center of the scale.

7. A combined protractor according to claim 6, characterized in that the first indicator (21) is of a strip-like configuration, the length of the first indicator (21) being greater than the radius of the measuring body (1), the first indicator (21) being adapted to read an indication of the angle obtained by the measurement of the first auxiliary assembly (2).

8. A combination protractor according to claim 6, wherein the first indicator (21), the two first connectors (23) and the first alignment member (22) are each provided with a projection (24) for facilitating alignment.

9. The combined protractor according to claim 8, wherein the first indicator (21) is provided with a first mounting hole (211) detachably connected with the mounting post (34), the first mounting hole (211) is a cylindrical hole, the first indicator (21) is perpendicular to the corresponding bump (24), and the rotation axis of the first mounting hole (211) is located on the surface of the first indicator (21) connected with the corresponding bump (24).

10. -a combination protractor according to claim 4, characterized in that said third auxiliary element (4) is of strip-like configuration; or the third auxiliary element (4) is a wire.