CN211926661U

CN211926661U - Angle gauge

Info

Publication number: CN211926661U
Application number: CN202020976402.6U
Authority: CN
Inventors: 陆琴莲
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-11-13
Anticipated expiration: 2030-06-02

Abstract

The utility model belongs to the technical field of the teaching aid technique and specifically relates to a protractor for measuring angle, length and drawing line segment, angle, this protractor have a straight flange at least, set up the scale interval that length scale and mark correspond at the edge of straight flange, still be provided with the angle scale on the protractor, the central point of angle scale, 0 scale mark and 180 scale marks all are located the outer edge of the straight flange that the protractor was provided with the length scale, and the angle scale is radial by central point semicircular in shape mark the angle that angle scale mark and angle scale mark are corresponding on the protractor. The utility model provides a protractor through the unique layout design that angle scale and sideline combine, in arbitrary plane, can realize through the appropriate amount of movement protractor: the angle formed by the second line and the first line is measured while drawing the second line, and the length of the drawn line segment can be observed through the length scale.

Description

Angle gauge

Technical Field

The utility model belongs to the technical field of the teaching aid technique and specifically relates to a protractor for measuring angle, length and drawing line segment, angle.

Background

The protractor is a common drawing tool, generally in a semicircular shape or other shapes, and in terms of layout, angle scales are arranged at the middle position, so that the protractor is limited to a simple measurement angle, and in the actual drawing operation, three steps are required for making an angle or an intersection line with a certain degree: (1) drawing a line segment 1 and determining the vertex of an angle; (2) coinciding the central point and the top point of the angle scale of the protractor, coinciding the 0 < degree > scale mark with the line segment 1, and determining and marking the other point position according to the angle scale of the protractor; (3) the line segment 2 connects the vertex and the mark point. The angle of a certain degree can be made at a fixed point only by the three steps of operation, the operation steps are multiple, the operation is more complicated, and the combined function of drawing a line and measuring the angle at the same time cannot be realized, namely: the angle of the second line relative to the first line cannot be measured at the same time as the second line.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical deficiencies and providing a protractor, which can measure the angle formed by a relative first line segment while drawing a second line segment when drawing an angle.

In order to achieve the above object, the utility model provides a protractor, this protractor have a straight flange at least, set up the scale interval that length scale and mark correspond at the edge of straight flange, still are provided with the angle scale on the protractor, the central point of angle scale, 0 scale mark and 180 scale marks all are located the outer edge of the straight flange that the protractor was provided with the length scale, and the angle scale is radial by central point semicircular in shape mark the angle that angle scale mark and angle scale mark are corresponding on the protractor. The protractor may be in the shape of a semicircle, a triangle or other shapes.

The protractor is semicircular, the outer edge of the chord edge of the semicircular protractor is the position of an angle scale central point, a 0 degree scale and a 180 degree scale, 0-180 degree scales are marked on the semicircular protractor, the chord edge is provided with length scales and scale values, the length scales take the angle scale central point as a 0 scale starting point, and the scale values are gradually increased towards two sides.

The protractor is triangular, preferably a right-angled triangle, and optimally adopts a 45-degree right-angled triangle; the center point of the angle scale, the 0 degree scale line and the 180 degree scale line are located on the outer edge of one of the straight edges, and the straight edge is provided with length scales and scale values. When a 45-degree right-angled triangle is adopted, the central point of the angle scale, the 0 degree scale mark and the 180 degree scale mark are located on the oblique side of the triangle.

The protractor is provided with a heavy-weight instrument, the heavy-weight instrument comprises a dial and a pointer, one end of the pointer is rotatably connected with the center of the dial, the dial is at least provided with scale marks for dividing the dial into four equal parts, and one of the scale marks is parallel to the straight edge of the protractor on which the length scales are arranged. The weight sag gauge is fixedly connected with the protractor, a hole or a groove can be arranged on the protractor, the weight sag gauge is embedded into the protractor and is fixed through sticky substances such as glue, and the weight sag gauge can also be fixed through screws, buckles and the like. For more convenience of use, the center point of the pointer of the weight scale is connected with the middle point in the length direction of the straight edge with the length scale, and the connecting line is perpendicular to the straight edge.

In order to facilitate use, taking and taking, the protractor is provided with a handle.

The protractor on the inner side or the outer side of the angle scale is provided with a hollowed circular arc structure, namely a hollowed arc, and the circle center of the circular arc structure coincides with the central point of the angle scale. The design can complete the function of the original semicircular protractor, and can realize the simultaneous drawing of lines and angles, so that the operation of drawing intersecting lines and angles of any angle is very simple.

The protractor according to the above is made of transparent material, such as plastic, glass, etc.

According to above, traditional set-square, protractor its combination teaching aid all can't accurately make level, perpendicular or be certain inclination's line on the blackboard, can't realize the measurement of angle simultaneously at the setting-out, and tool function singleness, troublesome poeration etc. is not enough, the utility model discloses a special design, change the position of quantity angle scale on 45 set-square, also increased the heavy plumb appearance simultaneously, combine set-square and protractor, heavy plumb appearance as an organic whole, realize that the line segment of arbitrary inclination is made to the accuracy, like water flat line, perpendicular line or slash, realize that the setting-out goes on simultaneously with the gauge angle, simply make intersection line and the angle of arbitrary angle to have the function of measuring angle and gradient, when reducing instrument quantity, expanded the function of original instrument.

The utility model provides a protractor through the unique layout design that angle scale and sideline combine, in arbitrary plane, can realize through the appropriate amount of movement protractor: the angle formed by the second line and the first line is measured while drawing the second line, and the length of the drawn line segment can be observed through the length scale. Namely, only two steps are needed to accurately draw angles of any degree, so that the drawing operation of drawing angles or intersecting lines of a certain degree is simpler.

The utility model discloses a structural design is novel, convenient to use, and easy operation when having original instrument function, has reduced instrument quantity, can accurately make level, perpendicular or be certain inclination's line segment, overcomes the shortcoming that setting-out and angulation can not go on simultaneously, conveniently makes the intersecting line and the angle of arbitrary angle, makes angulation, setting-out mapping operation more accurate, simple, effectively improves mapping efficiency.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of a section along line AB of FIG. 1 and an enlarged view of the front side of the plumbing fixture;

FIG. 3 is a schematic diagram illustrating horizontal line operation;

FIG. 4 is a schematic view of the vertical line operation;

FIG. 5 is a schematic illustration of an operation as a 30 tilt line;

fig. 6 is a schematic structural view of the protractor of the present invention in a semicircular shape;

FIG. 7 is an operational view of a certain degree angle;

fig. 8 is the utility model discloses a 45 right angle set-square sketch map.

Detailed Description

The invention is further described by the following embodiments in conjunction with the accompanying drawings.

Example 1:

as shown in fig. 1 and 2, the protractor described in this embodiment is a 45 ° right triangle with a function of measuring a length of a line segment, and a length scale 3 is provided at an edge of a hypotenuse 2 of the direct triangle; the outer edge of the bevel edge 2 is a 0 degree scale line and a 180 degree scale line, a central point 5 of a 0-180 degree angle scale 4 is located at the middle point position of the length direction of the bevel edge 2, the central point 5 is radial, and other angle scale 4 lines and angles corresponding to the angle scale 4 lines are marked on a triangle where the central point 5 is located; the inner side of the angle scale 4 is provided with a hollowed-out arc 6, and the inner side and the outer side of the hollowed-out arc 6 are provided with an inner ring angle scale 4 and an outer ring angle scale 4 on the set square; the handle 10 is arranged along the direction of a perpendicular bisector of a 45 triangular plate, a draping instrument 7 is arranged above the handle 10, the draping instrument 7 is arranged on the right-angle triangular plate, and the two are fixed into a whole; the triangular plate is provided with a groove for embedding the weight plumb instrument 7; the central point 5 of the pointer 9 of the weight plumb instrument 7 is connected with the midpoint of the length direction of the hypotenuse 2, and the connecting line is vertical to the hypotenuse 2 of the right-angle triangle; the heavy plumb bob instrument 7 is of a disc type pointer 9 type, the heavy plumb bob instrument 7 comprises a pointer 9, a dial 8, a rotating shaft and a damping liquid, a 0 < degree > rod of an angle scale 4 of the heavy plumb bob instrument 7 is positioned on a vertical line position in a triangular plate, and the 0 < degree > rod-180 < degree > rod-scale 4 is increased towards the left and the right. When the triangle is in the vertical direction, the pointer 9 rotates around the rotating shaft under the action of gravity and always points to the vertical downward direction. When the pointer 9 points to 0, the triangular plate inclined edge 2 is at a horizontal position, and a horizontal line can be drawn, as shown in fig. 3; when the pointer 9 points to 90 ℃, the inclined edge 2 of the triangular plate is in a vertical position, and a vertical line can be drawn, as shown in fig. 4; when the pointer 9 points to 30, the triangle oblique side 2 forms a 30 tilt angle with the horizontal line, a 30 tilt line can be drawn, as shown in fig. 5; similarly, the direction of the set square is adjusted on the vertical plane, and a line with any inclination angle can be made on the blackboard according to the angle indicated by the pointer 9.

Example 2:

the utility model discloses a light printing opacity material preparation can see through the material and observe various mark lines. As shown in fig. 6, the utility model discloses a semicircular protractor 1, a 5 central point of the protractor 1, a 0-180 degree scale 4, an inner circle angle scale 4, and an angle scale 4 line of common special angles such as 10 ℃, 20 ℃, 30 ℃, 45 ℃, 60, 70 ℃, 80, 90 ℃ are marked on the edge position semicircle at the end of a chord by setting the protractor 1, the angle scale 4 is marked on the end of the chord. One end of the chord edge is provided with a bulge, the inner side of the chord edge is provided with a length scale 3 and a scale value, the length scale 3 takes a central point 5 as a scale starting point 0, and the scale value increases progressively towards the two sides. To clarify the unique function achieved by this unique layout of the position of the angle scale 4, the following example of the operation of the drawing is given:

as shown in fig. 7, an angle of 30 is made, a chord edge is used as a line segment OB, then a central point 5 is overlapped with a peak O of the angle, a protractor 1 is rotated until the OB is overlapped with an angle scale of 30, and then a line segment OA is made along the chord edge, so that the AOB is 30, and the length of the line segment OA can be measured. Similarly, any degree of angle or intersection line can be made, and any degree of angle or intersection line can be accurately made by the two-step method.

Example 3:

as shown in fig. 8, preferably, the angle gauge 1 may be a 45 ° right triangle having a function of measuring angles, where an angle scale 4 central point 5 and a 180 ° degree scale are located at the outer edge of the hypotenuse 2, the angle scale 4 central point 5 is located at the middle point of the length direction of the hypotenuse 2, angles corresponding to

other angle scales

4 and 4 are marked on the triangle in a radial manner from the central point 5, and meanwhile, angle scales 4 of common angles of the front, the rear, the 60, the 70, the 80, the 90 ° and the like are marked with emphasis. At least the hypotenuse 2 of the right triangle has a length scale 3 for measuring the length of the line segment.

Claims

1. A protractor is characterized in that: the protractor at least has a straight edge, length scales are arranged on the edge of the straight edge, corresponding scale values are marked, angle scales are further arranged on the protractor, the central point, the 0-degree scale line and the 180-degree scale line of the angle scales are all located on the outer edge of the straight edge, provided with the length scales, of the protractor, and the angle scales are radially marked with angles corresponding to the angle scale lines on the protractor from the central point in a semicircular shape.

2. A protractor as claimed in claim 1, wherein: the protractor is semicircular, the outer edge of the chord edge of the semicircular protractor is the position of an angle scale central point, a 0 degree scale and a 180 degree scale, 0-180 degree scales are marked on the semicircular protractor, the chord edge is provided with length scales and scale values, the length scales take the angle scale central point as a 0 scale starting point, and the scale values are gradually increased towards two sides.

3. A protractor as claimed in claim 1, wherein: the protractor is triangular, and the central point of the angle scale, the 0 degree scale mark and the 180 degree scale mark are located on the outer edge of one of the straight sides, and the straight side is provided with length scales and scale values.

4. A protractor as claimed in claim 1, 2 or 3, wherein: the protractor is provided with a heavy-weight instrument, the heavy-weight instrument comprises a dial and a pointer, one end of the pointer is rotatably connected with the center of the dial, the dial is at least provided with scale marks for dividing the dial into four equal parts, and one of the scale marks is parallel to the straight edge of the protractor on which the length scales are arranged.

5. A protractor as claimed in claim 4, wherein: the protractor is provided with a handle.

6. A protractor as claimed in claim 1, 2 or 3, wherein: the protractor at the inner side or the outer side of the angle scale is provided with a hollowed-out arc-shaped structure, and the circle center of the arc-shaped structure is coincided with the central point of the angle scale.