Combined multifunctional protractor

Abstract

The utility model relates to a combined multifunctional protractor, which comprises a circular main plate and an auxiliary plate, wherein the edge of the top surface and / or the bottom surface of the main plate is provided with angle scale marks; the auxiliary plate can be sleeved outside the main plate and can rotate relative to the main plate; a positioning hole coaxial with the main plate is formed in the circle center of the main plate, a first straight plate extends on the side wall of the main plate, and the first straight plate is provided with a first straight edge extending in the radial direction of the main plate and a second straight edge tangent to the main plate; a plurality of arc-shaped main plate notches are formed in the side wall of the main plate at equal intervals; the auxiliary plate is provided with a semicircular auxiliary plate notch which can be matched with the main plate to be embedded, the side wall, corresponding to one end of the auxiliary plate notch, of the auxiliary plate extends outwards to form a second straight plate, and the second straight plate is provided with a third straight edge flush with the end face of the auxiliary plate notch; and the auxiliary plate is provided with an auxiliary plate bulge which can be matched and clamped with the main plate notch on the side wall of the auxiliary plate notch. The multifunctional ruler not only can be used for measuring angles, but also can be used for drawing angles with different angle values, and is convenient and practical.

Description

TECHNICAL FIELD

[0001] The utility model relates to stationery field especially a combined multifunctional protractor. BACKGROUND

[0002] The protractor is stationery that students use when learning geometry. The existing protractor is usually semicircular and can only be used to measure the angle value within 180 degrees. It cannot measure the angle exceeding 180 degrees. Moreover, the existing protractor only has the function of measuring the angle. In practical application, on one hand, the angle is measured, and on the other hand, the students will encounter the need to draw an angle with a certain angle. At this time, the existing protractor cannot be used in drawing, thereby reducing the learning efficiency of the students. SUMMARY

[0003] In view of the existing deficiencies, the utility model provides a combined multifunctional protractor.

[0004] The utility model discloses a combined multifunctional protractor, which comprises a main plate with an angle scale line arranged on the edge of the circular top surface and / or bottom surface, a sub plate capable of being sleeved on the main plate and capable of rotating relative to the main plate, a positioning hole coaxial with the main plate arranged at the center of the main plate, a first straight plate extended on the side wall of the main plate, a first straight edge extended along the radial direction of the main plate and a second straight edge tangent to the main plate arranged on the first straight plate, a plurality of arc-shaped main plate notches arranged on the side wall of the main plate at equal intervals, a semicircular sub plate notch capable of matching the main plate arranged on the sub plate, a second straight plate extended outward on the side wall of the sub plate corresponding to one end of the sub plate notch, a third straight edge flush with the end surface of the sub plate notch arranged on the second straight plate, and a sub plate protrusion capable of matching and clamping the main plate notch arranged on the side wall of the sub plate notch.

[0005] Preferably, the sub plate protrusion is arranged at the middle part of the side wall of the sub plate notch.

[0006] Preferably, a plurality of first straight edge notches are arranged on the first straight edge at intervals.

[0007] Preferably, a plurality of third straight edge notches are arranged on the third straight edge at intervals.

[0008] Preferably, a first straight plate through hole in the shape of a long strip parallel to the first straight edge is arranged on the first straight plate, and a second straight plate through hole in the shape of a long strip parallel to the third straight edge is arranged on the second straight plate.

[0009] Preferably, the sub plate is a semicircular fan ring structure.

[0010] As preferred, the main plate is provided with a plurality of fan-shaped main plate through holes which are equidistantly arranged along the circumference of the positioning hole, and two adjacent main plate through holes are separated by a spacing strip, one of the spacing strips is arranged in the radial direction of the first straight edge and adjacent to one side of the first straight plate.

[0011] As preferred, the main plate through hole is provided with three.

[0012] As preferred, the included angle between two adjacent main plate notches is 3-10 degrees.

[0013] As preferred, the first straight plate and / or the second straight plate is provided with a length scale line.

[0014] The main plate of the utility model can measure the angle within 360 degrees, the angle value of the required angle is adjusted by the rotation of the secondary plate relative to the main plate, then the required angle can be drawn by drawing a line along the first straight edge and the third straight edge, and the main plate and the secondary plate are two separate components, the main plate is embedded into the secondary plate notch of the secondary plate when drawing, and the two are separated when measuring the angle, so that the secondary plate does not affect the measurement of the angle by the main plate, which is convenient and practical. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the structure schematic view of the utility model embodiment secondary plate sleeve in the main plate;

[0016] Figure 2 is the structure schematic view of the utility model embodiment main plate and first straight plate;

[0017] Figure 3 is the structure schematic view of the utility model embodiment secondary plate and second straight plate;

[0018] Component name and serial number in the figure: 1-main plate 10-angle scale line 11-positioning hole 12-main plate notch 13-main plate through hole 14-spacing strip 2-secondary plate 20-secondary plate notch 21-secondary plate protrusion 3-first straight plate 30-first straight edge 31-second straight edge 32-first straight plate through hole 300-first straight edge notch 4-second straight plate 40-third straight edge 41-second straight plate through hole 400-third straight edge notch 5-length scale line. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present application, the present application will be further described below with reference to the drawings and embodiments, and a clear and complete description will be made. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] The present application provides the following embodiments. Figures 1 to 3The utility model provides a multifunctional angle ruler, which comprises a main plate 1 with a circular top surface and / or bottom surface edge provided with angle scale lines 10 from 0 degrees to 360 degrees, a sub-plate 2 capable of being sleeved outside the main plate 1 and capable of rotating relative to the main plate 1, and a positioning hole 11 coaxial with the main plate 1 provided at the center of the main plate 1, wherein the sub-plate 2 is a separate component from the main plate 1, the two are combined and placed on a paper surface when an angle needs to be drawn, and the sub-plate 2 is rotated relative to the main plate 1 on the paper surface to adjust the required angle value, the main plate 1 and the sub-plate 2 are in the same plane, which is more conducive to drawing the angle, and the measurement and drawing do not affect each other, the first straight plate 3 is integrally formed with the main plate 1, the angle scale lines 10 are arranged on the upper surface and / or lower surface of the main plate 1, the first straight plate 3 is provided with a first straight edge 30 extending radially along the main plate 1 and a second straight edge 31 tangent to the main plate 1, the first straight edge 30 is aligned with the 0-degree angle scale line 10 on the main plate 1 and extends away from the main plate 1, the extension line of the first straight edge 30 at one end of the main plate 1 passes through the axis of the positioning hole 11, when the angle is measured, the positioning hole 11 is aligned with the vertex of the angle, and the first straight edge 30 is aligned with one side line of the angle, the second straight edge 31 can be parallel to the first straight edge or inclined to the first straight edge 30 and tangent to the main plate 1, at this time, the tangent point of the second straight edge 31 and the main plate 1 is the position corresponding to the 270-degree angle scale line 10, which improves the structural firmness of the first straight plate 3 on the main plate 1, the main plate 1 is further provided with a plurality of arc-shaped main plate notches 12 at equal intervals on the side wall and arranged circumferentially around the main plate 1, the sub-plate 2 is provided with a semicircular sub-plate notch 20 capable of matching the main plate 1 and being embedded, the diameter of the main plate 1 matches the diameter of the sub-plate notch 20, the main plate 1 is embedded in the sub-plate notch 20, the sub-plate 2 is sleeved on the outer side wall of the main plate 1 and can rotate along the circumference of the main plate 1, when an angle with a certain angle value is needed, the rotation of the sub-plate 2 on the main plate 1 is adjusted to realize it, for example, the sub-plate 2 is provided in the form of a semicircular sector, the inner ring of the sub-plate 2 constitutes the sub-plate notch 20, and the outer ring of the sub-plate 2 can be used to draw an arc line, at this time, the second straight plate 4 extends outward on the side wall corresponding to one end of the sub-plate notch 20, the second straight plate 4 is integrally formed with the sub-plate 2, the second straight plate 4 can also be used to draw a straight line, the second straight plate 4 and the first straight plate 3 are provided in the same length, the second straight plate 4 is provided with a third straight edge 40 flush with the end face of the sub-plate notch 20, that is, the third straight edge 40 and the two end faces of the sub-plate notch 30 are in the same straight line, and the extension line of the third straight edge 40 on the sub-plate 2 to the other end passes through the center point of the sub-plate notch 30.The side wall of the auxiliary plate 2 is provided with an auxiliary plate protrusion 21 which can be matched with the main plate gap 12. The matching of the auxiliary plate protrusion 21 and the main plate gap 12 can position the rotation of the auxiliary plate 2 on the main plate 1. At this time, the straight line drawn along the first straight edge 30 and the third straight edge 40 is the two sides of the angle. When measuring the angle, if the angle is between two intersecting lines, the positioning hole 11 is aligned with the intersection of the two lines, and then the first straight edge 30 of the first straight plate 3 is aligned with one of the two lines. The angle scale 10 aligned with the other line is the angle value of the angle between the two lines. At this time, the auxiliary plate 2 is not needed. If the two lines do not directly intersect but the extension of one line intersects with the other line, the positioning hole 11 of the main plate 1 and the first straight edge 30 are aligned with one of the two lines, and the other line is at the position opposite to the first straight edge 30. Then the auxiliary plate 2 is sleeved on the main plate 1 with the third straight edge 40 opposite to the first straight edge 30. Then the auxiliary plate 2 is rotated so that the third straight edge 40 is aligned with the other line. The angle scale 10 aligned with the third straight edge 40 is the angle between the two lines. When drawing, the auxiliary plate 2 is sleeved on the main plate 1 with the third straight edge 40 opposite to the first straight edge 30. According to the angle value, the auxiliary plate 2 is rotated so that the third straight edge 40 is aligned with the corresponding value on the angle scale 10. Then the line drawn along the third straight edge 40 and the first straight edge 30 forms the two straight lines of the angle. For the angle less than or equal to 90 degrees, the above method can be used. For the angle greater than 90 degrees, when the auxiliary plate 2 is sleeved on the main plate 1, the end face of the auxiliary plate gap 20 opposite to the third straight edge 40 is opposite to the first straight edge 30. That is, the third straight edge 40 is at one end of the auxiliary plate gap 20, and the end face of the other end of the auxiliary plate gap 20 is opposite to the first straight edge 30. Then the auxiliary plate 2 is rotated accordingly.

[0021] Further improvements, as shown in Figure 3 , the auxiliary plate protrusion 21 is arranged at the middle of the side wall of the auxiliary plate gap 20, which can better position the rotation of the auxiliary plate 2 on the main plate 1.

[0022] Further improvements, as shown in Figure 2 , the first straight edge 30 is provided with a plurality of first straight edge gaps 300 arranged at intervals, which can be used to draw points at the first straight edge gaps 300. The plurality of points drawn are on the same straight line. The first straight edge gap 300 can be a semicircular gap. Similarly, as shown in Figure 3 , the third straight edge 40 is provided with a plurality of third straight edge gaps 400 arranged at intervals. When the first straight edge 30 is provided with the first straight edge gap 300 and the third straight edge 40 is also provided with the third straight edge gap 400, the first straight edge gap 300 and the third straight edge gap 400 are arranged at corresponding positions. After the auxiliary plate 2 is sleeved on the main plate 1,Figure 1 As shown in the figure, when the first straight edge 30 and the third straight edge 40 abut, the first straight edge notch 300 and the third straight edge notch 400 form a hole, which is more conducive to use.

[0023] Further improvements, such as Figures 1 to 3 As shown in the figure, the first straight plate 3 is provided with a long strip-shaped first straight plate through hole 32 parallel to the first straight edge 30, and the second straight plate 4 is provided with a long strip-shaped second straight plate through hole 41 parallel to the third straight edge 40. In this way, after the sub-plate 2 is sleeved on the main plate 1, when the first straight edge 30 and the third straight edge 40 abut, the first straight plate through hole 32 and the second straight plate through hole 41 are in a parallel state, and the first straight plate through hole 32 and the second straight plate through hole 41 can be used to draw parallel lines; At this time, a plurality of first straight plate through holes 32 can be provided on the first straight plate 3, and a plurality of first straight plate through holes 32 are arranged in a row-column structure, and similarly, a plurality of second straight plate through holes 41 arranged in a row-column structure are also provided on the second straight plate 4. In this way, two or more parallel lines with different spacings can be drawn.

[0024] Further improvements, such as Figure 1 and Figure 2 As shown in the figure, the main plate 1 is provided with a plurality of fan-shaped main plate through holes 13 around the circumference of the positioning hole 11, and each two adjacent main plate through holes 13 are spaced apart by a spacing strip 14. One of the plurality of spacing strips 14 is located in the radial direction of the first straight edge 30 and is arranged adjacent to one side of the first straight plate 3, that is, a plurality of main plate through holes 13 are provided on the main plate 1, and the main plate 1 is hollowed out by using the main plate through hole 13. At this time, the main plate 1 can be made of stainless steel material, and the angle scale line 10 is arranged on the upper surface and / or the lower surface of the main plate 1, and the face provided with the angle scale line 10 can be directed towards the user during use. The positioning hole 11 is also provided in a through hole structure to facilitate alignment with the vertex of the angle to be measured, and the main plate through hole 13 facilitates viewing of the two straight lines of the angle to be measured under the main plate 1. Each two adjacent main plate through holes 13 are spaced apart by a spacing strip 14, which means that there are several spacing strips 14 corresponding to the number of main plate through holes 13. One of the plurality of spacing strips 14 is located in the radial direction of the first straight edge 30 and is arranged adjacent to one side of the first straight plate 3 on the main plate 1. As shown in the figure, Figure 1 and Figure 2As shown in the figure, the first straight plate 3 is on the right side of the main plate 1 corresponding to the 0-degree angle scale line 10, at this time, among the plurality of interval strips 14, one interval strip 14 is on the right side of the main plate 1 corresponding to the position of the 0-degree angle scale line 10, and a plurality of interval strip through holes along the 0-degree angle scale line 10 are arranged on the interval strip 14 to facilitate the alignment of the first straight edge 30 and the positioning hole 11. As the main plate through hole 13 is arranged as three, each main plate through hole 13 has a large enough area, and there is no excessive interval strip 14, which facilitates use while maintaining the stability of the structure.

[0025] Further improvements, as shown in Figure 1 and Figure 2 The angle between the two adjacent main plate notches 12 is 3-10 degrees, which can accurately obtain the angle of the sub-plate 2 rotating around the main plate 1, thereby obtaining the value of the drawn angle, such as being set to 5 degrees.

[0026] Further improvements, as shown in Figures 1 to 3 The first straight plate 3 and / or the second straight plate 4 is provided with a length scale line 5, that is, the length scale line 5 is arranged on the first straight plate 3, or the second straight plate 4, or both the first straight plate 3 and the second straight plate 4, so that the first straight plate 3 or the second straight plate 4 can be used as a ruler, and the length scale line 5 can be arranged according to international units and / or English units.

[0027] Although the utility model has been described in detail above with general description and specific implementation, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model, all belong to the scope of protection required by the utility model.

Claims

1. A combination multifunctional protractor, characterized in that, The main plate with a circular top surface and / or bottom surface edge is provided with angular scale lines, a sub-plate can be sleeved outside the main plate and can rotate relative to the main plate; the main plate is provided with a positioning hole coaxial with the main plate at the center, the first straight plate extends on the side wall of the main plate, the first straight plate is provided with a first straight edge extending radially of the main plate and a second straight edge tangent to the main plate; the main plate is also provided with a plurality of arc-shaped main plate notches on the side wall at equal intervals; the sub-plate is provided with a semicircular sub-plate notch that can match the main plate, the second straight plate extends outward on the side wall corresponding to one end of the sub-plate notch, and the second straight plate is provided with a third straight edge flush with the end face of the sub-plate notch; the sub-plate is provided with a sub-plate protrusion on the side wall of the sub-plate notch that can match and engage the main plate notch.

2. The combination multifunction protractor according to claim 1, wherein The sub-plate protrusion is arranged in the middle of the side wall of the sub-plate notch.

3. The combination multifunction protractor according to claim 1, wherein A plurality of first straight edge notches are arranged on the first straight edge at intervals.

4. The combination multifunction protractor according to claim 1 or 3, wherein A plurality of third straight edge notches are arranged on the third straight edge at intervals.

5. The combination multifunction protractor according to claim 1, wherein The first straight plate is provided with a long strip-shaped first straight plate through hole parallel to the first straight edge, and the second straight plate is provided with a long strip-shaped second straight plate through hole parallel to the third straight edge.

6. The combination multifunction protractor according to claim 1, wherein The sub-plate is a semicircular fan ring structure.

7. The combination multifunction protractor according to claim 1, wherein A plurality of fan-shaped main plate through holes are arranged on the main plate at equal intervals around the circumference of the positioning hole, and adjacent two main plate through holes are separated by a spacing strip, one of the plurality of spacing strips is arranged on the radial direction of the first straight edge and adjacent to one side of the first straight plate.

8. The combination multifunction protractor according to claim 1, wherein The main plate through hole is provided with three.

9. The combination multifunction protractor according to claim 1, wherein The included angle between adjacent two main plate notches is 3-10 degrees.

10. The combination multifunction protractor according to claim 1, wherein The first straight plate and / or the second straight plate is provided with a length scale line.

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