CN106626907A

CN106626907A - Practical protractor

Info

Publication number: CN106626907A
Application number: CN201610905640.6A
Authority: CN
Inventors: 唐迪
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-10-17
Filing date: 2016-10-17
Publication date: 2017-05-10

Abstract

The invention discloses a practical protractor. The practical protractor comprises a rotating ruler, a main bracket and a rotating shaft cap. The rotating ruler includes a movable ruler, an upper rotating shaft, a lower rotating shaft and a semicircular projection; the movable ruler is a thin cuboid; the upper rotating shaft is fixed on the upper surface of the lower end, and is a 1/4 cylinder; the lower rotating shaft is fixed at the top of the lower end of the movable ruler, and is a semicylinder; the semicircular projection is on the outer edge of the semicylinder of the lower rotating shaft; the main bracket includes a static ruler and an angle ruler; the angle ruler is a thin semiring; the static ruler is totally a cuboid; the rotating ruler is mounted on the static ruler of the main bracket, and the two are in clearance fit; and the rotating shaft cap is fixedly mounted on the upper rotating shaft of the rotating ruler. The practical protractor can once draw two edges of an angle, can directly mark the lengths of the two edges, has an angle measuring function, and is convenient to use, simple in structure, low in production cost and excellent in market popularization prospect.

Description

A kind of practical angle drawing device

Technical field

The invention mainly relates to drawing instrument field, more particularly to a kind of practical angle drawing device.

Technical background

At any angle angle needs to be carried out with protractor substep current one, the picture on paper, the long period is taken, using not It is convenient.

The content of the invention

The object of the invention is exactly that at any angle angle needs to be carried out with protractor substep in order to solve one, picture, is taken longer A kind of problem of time, there is provided practical angle drawing device.

The present invention is achieved by the following technical solutions：

A kind of practical angle drawing device, it is characterised in that：Rotary scale, main body rack, rotating shaft cap are included, rotary scale includes dynamic mark Chi, upper rotating shaft, lower rotary shaft, semicircular ring are raised, and dynamic scale is thin cuboid, and lower end upper surface fixes upper rotating shaft, and upper rotating shaft is A quarter cylinder, moves the fixed lower rotary shaft in scale lower end top, and lower rotary shaft is semicylinder, in lower rotary shaft semicylinder outer It is that semicircular ring is raised.

The main body rack includes quiet scale, angle scale, and angle scale is thin semi-circular ring, and quiet scale is generally grown Cube, is empty a quarter cylinder in the upper half storey of cuboid, is empty semicylinder in the lower half storey of quiet scale cuboid, And have semi-circular shape groove in the upper half storey lower surface of quiet scale cuboid upwards along the outer of the empty semicylinder, cut out quiet Scale left half lower half slice width degree and empty semicylinder radius identical part, rotary scale is arranged on the quiet scale of main body rack On, both form gap cooperation, and the upper surface of quiet scale cuboid has semi-circular shape groove.

The rotating shaft cap is 3/4ths thin cylinders, and outer edge is downwardly convex to form 3/4ths protruding rings, and it half Footpath is identical with the radius of quiet scale cuboid upper surface semi-circular shape groove, and rotating shaft cap is fixedly mounted on the upper rotating shaft of rotary scale On, a quarter breach longitudinal edge of rotating shaft cap and rotary scale the right along concordant, the downward annular protrusion of rotating shaft cap with it is quiet Scale cuboid surface annular groove is inlayed, and both form gap cooperation.

Described a kind of practical angle drawing device, it is characterised in that：The thickness of the lower rotary shaft semicylinder and dynamic scale thickness Identical, shaft radius are slightly larger in lower rotary shaft semicylinder radius ratio, and their axial line overlaps, as the rotary shaft of rotary scale Heart line.

Described a kind of practical angle drawing device, it is characterised in that：The axial line of the empty semicylinder, empty a quarter The axial line of cylinder, the axial line three of rotary scale overlap.

Described a kind of practical angle drawing device, it is characterised in that：The dynamic scale and quiet scale indicate length scale, angle mark Chi indicates angle index.

The present invention principle be：

When picture is less than or equal to an angle of 90 degrees more than 0 degree, the right of dynamic scale to be drawn the angle index at angle, the dynamic scale in edge along alignment With two sides that quiet scale directly draws angle, and the length scale on dynamic scale and quiet scale can be compareed, put on two sides Length.When needing picture to be less than the angle of 180 degree more than 90 degree, first dynamic scale on the position less than an angle of 90 degrees, first The a line at angle is drawn along quiet scale, then dynamic scale is drawn angle in addition in needing on the scale at angle of picture along dynamic scale A line.

It is an advantage of the invention that：

Disposably two sides at angle can be drawn using the present invention, and can directly mark the length on two sides, and with angulation Function, easy to use, simple structure of the invention, low cost of manufacture has extraordinary market promotion prospect.

Description of the drawings

Accompanying drawing 1 is floor map of the invention.

Accompanying drawing 2 is a kind of structural representation of the rotary scale of practical angle drawing device.

Accompanying drawing 3 is a kind of structural representation of the rotating shaft cap of practical angle drawing device.

Accompanying drawing 4 is a kind of structural representation of the main body rack of practical angle drawing device.

Specific embodiment

As shown in figure 1, a kind of practical angle drawing device, includes rotary scale, main body rack, rotating shaft cap 1, rotary scale includes Dynamic scale 2, upper rotating shaft 3, lower rotary shaft 4, semicircular ring projection 5, it is thin cuboid to move scale 2, and lower end upper surface fixes upper rotating shaft 3, upper rotating shaft 3 is a quarter cylinder, moves the fixed lower rotary shaft 4 in the lower end of scale 2 top, and lower rotary shaft 4 is semicylinder, at lower turn The semicylinder outer of axle 4 is semicircular ring projection 5.

Main body rack includes quiet scale 6, angle scale 7, and angle scale 7 is thin semi-circular ring, and quiet scale 6 is generally grown Cube, is empty a quarter cylinder in the upper half storey of cuboid, is empty semicolumn in the lower half storey of the cuboid of quiet scale 6 Body, and have semi-circular shape groove in the upper half storey lower surface of the cuboid of quiet scale 6 upwards along the outer of the empty semicylinder, dig The semicylinder radius identical part of the cuboid left half lower half slice width degree of quiet scale 6 and sky, rotary scale is gone to be arranged on master On the quiet scale 6 of body support frame, both form gap cooperation, and the upper surface of the cuboid of quiet scale 6 has semi-circular shape groove.

Rotating shaft cap 1 be 3/4ths thin cylinders, outer edge it is downwardly convex formed 3/4ths protruding rings, its radius with The radius of the cuboid upper surface semi-circular shape groove of quiet scale 6 is identical, and rotating shaft cap 1 is fixedly mounted on the upper rotating shaft 3 of rotary scale On, a quarter breach longitudinal edge of rotating shaft cap 1 and rotary scale the right along concordant, the downward annular protrusion of rotating shaft cap 1 and Quiet scale cuboid surface annular groove is inlayed, and both form gap cooperation.

The thickness of the semicylinder of the lower rotary shaft 4 is identical with the thickness of dynamic scale 2, turns in the semicylinder radius ratio of lower rotary shaft 4 The radius of axle 3 is slightly larger, and their axial line overlaps, as the shaft center line of rotary scale.

The axial line of the empty semicylinder, axial line, the axial line of rotary scale of empty a quarter cylinder Three overlaps.

The dynamic scale 2 and quiet scale 6 indicate length scale, and angle scale 7 indicates angle index.

Claims

1. a kind of practical angle drawing device, it is characterised in that：Rotary scale, main body rack, rotating shaft cap are included, rotary scale includes dynamic Scale, upper rotating shaft, lower rotary shaft, semicircular ring are raised, and dynamic scale is thin cuboid, and lower end upper surface fixes upper rotating shaft, upper rotating shaft For a quarter cylinder, the fixed lower rotary shaft in scale lower end top is moved, lower rotary shaft is semicylinder, outside lower rotary shaft semicylinder Edge is that semicircular ring is raised；

The main body rack includes quiet scale, angle scale, and angle scale is thin semi-circular ring, and quiet scale is generally rectangular Body, is empty a quarter cylinder in the upper half storey of cuboid, is empty semicylinder in the lower half storey of quiet scale cuboid, and There is semi-circular shape groove in the upper half storey lower surface of quiet scale cuboid upwards along the outer of the empty semicylinder, cut out quiet mark Chi left half lower half slice width degree and empty semicylinder radius identical part, rotary scale is arranged on the quiet scale of main body rack On, both form gap cooperation, and the upper surface of quiet scale cuboid has semi-circular shape groove；

The rotating shaft cap is 3/4ths thin cylinders, and outer edge is downwardly convex to form 3/4ths protruding rings, its radius with The radius of quiet scale cuboid upper surface semi-circular shape groove is identical, and rotating shaft cap is fixedly mounted in the upper rotating shaft of rotary scale, The a quarter breach longitudinal edge of rotating shaft cap and rotary scale the right along concordant, the downward annular protrusion of rotating shaft cap and quiet scale Cuboid surface annular groove is inlayed, and both form gap cooperation.

2. a kind of practical angle drawing device according to claim 1, it is characterised in that：The thickness of the lower rotary shaft semicylinder with Dynamic scale thickness is identical, and shaft radius are slightly larger in lower rotary shaft semicylinder radius ratio, and their axial line overlaps, as rotation mark The shaft center line of chi.

3. a kind of practical angle drawing device according to claim 1, it is characterised in that：The axial line of the empty semicylinder, The axial line of empty a quarter cylinder, the axial line three of rotary scale overlap.

4. a kind of practical angle drawing device according to claim 1, it is characterised in that：The dynamic scale and quiet scale indicate length Scale, angle scale indicates angle index.