CN206841013U

CN206841013U - Drawing ruler

Info

Publication number: CN206841013U
Application number: CN201621360829.3U
Authority: CN
Inventors: 孙谦怀
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-13
Filing date: 2016-12-13
Publication date: 2018-01-05
Anticipated expiration: 2026-12-13

Abstract

The utility model discloses a kind of drawing ruler, and the angle dial of measurable angle is provided with any side of ruler and freely sagging pointer, the angle dial graduation mark are 0 by central point⁰And rotate 90 from central point to both sides⁰Circular arc composition, be connected with the sagging pointer of rotatable freedom in the circle centre position of angle dial, and freely sagging pointer orientation angle dial 0⁰Graduation mark, the both sides that same horizontal line is in the center of circle are 90⁰Graduation mark, and the center of circle and both sides 90⁰Graduation mark, which is located at ruler, a scale side, and 0⁰Graduation mark is located at ruler without scale side.The utility model solves the problems, such as that existing instrument mapping is constant and not accurate.

Description

Drawing ruler

Technical field

The utility model belongs to teaching aid, is a kind of drawing ruler specifically.

Background technology

At present, in teaching process, teacher is drawing various triangles and special parallelogram etc., due to only simple Teaching aid, most of teacher is to complete teaching by some sketches of Freehandhand-drawing.This method has the following disadvantages：Teacher It is extremely inconvenient when being mapped when at school, and the figure made and lack of standardization, it is unfavorable for the understanding of student, while can also waste in large quantities Time.

The content of the invention

The utility model solves the deficiencies in the prior art, there is provided one kind mapping is quick and accurately drawing ruler.

Used technical scheme is the utility model to achieve the above object：

A kind of drawing ruler, including ruler with a scale, the angle index of measurable angle is provided with any side of ruler Disk and freely sagging pointer, the angle dial graduation mark are 0 by central point⁰And rotate 90 from central point to both sides⁰Circular arc Composition, the sagging pointer of rotatable freedom is connected with the circle centre position of angle dial, and freely sagging pointer points to angle Spend dial 0⁰Graduation mark, the both sides that same horizontal line is in the center of circle are 90⁰Graduation mark, and the center of circle and both sides 90⁰Graduation mark position There is a scale side in ruler, 0⁰Graduation mark is located at ruler without scale side.

Further, the opposite side of the ruler is provided with the cross bar being connected with angle dial, and handle is arranged with cross bar Hand, it is easy to take drawing ruler during mapping.

Further, for the sagging pointer of the freedom when ruler is in horizontality, freely sagging pointer points to 0 degree, Ruler with it is horizontal at an angle when, then the angle that freely sagging pointer points to is exactly ruler and horizontal institute's angle degree.

Preferably, the flexible connection is that screw rod is sequentially passed through to suspension ring, the ruler of freely sagging pointer, then nut is consolidated It is scheduled on rear side of ruler.

The utility model sets angle dial on ruler, can be fast and accurate under the cooperation of ruler and angle Various triangles and parallelogram are made, on the one hand reduces the time for mapping of attending class, is on the other hand more beneficial in teaching The understanding of appearance.The utility model can also work as horizon rule use, also can test object the elevation angle and the angle of depression.

Brief description of the drawings

Fig. 1 the utility model structure diagrams.

Fig. 2 parallelogram schematic diagrames.

Fig. 3 rhombus schematic diagrames.

Fig. 4 ∠ AOB schematic diagrames.

In figure：1st, ruler, 2, angle dial, 3, free sagging pointer, 4, cross bar, 5, handle.

Embodiment

The utility model is further described below in conjunction with the accompanying drawings：

As shown in figure 1, a kind of drawing ruler, including ruler 1 with a scale, it is provided with measurable angle in any side of ruler 1 The angle dial 2 of degree and freely sagging pointer 3, the graduation mark of angle dial 1 are 0 by central point⁰And from central point to Both sides rotation 90⁰Circular arc composition, be connected with the sagging pointer 3 of rotatable freedom in the circle centre position of angle dial 2, and Freely sagging pointer refers to 3 to angle dial 0⁰Graduation mark, the both sides that same horizontal line is in the center of circle are 90⁰Graduation mark, and circle The heart and both sides 90⁰Graduation mark, which is located at ruler 1, a scale side, and 0⁰Graduation mark is located at ruler without scale side.

Further, the opposite side of the ruler is provided with the cross bar 4 being connected with angle dial, and handle is arranged with cross bar Hand 5, it is easy to take drawing ruler during mapping.

Further, for the sagging pointer 3 of the freedom when ruler is in horizontality, freely sagging pointer 3 points to 0 degree, Ruler with it is horizontal at an angle when, then the angle that freely sagging pointer 3 points to is exactly ruler and horizontal institute's angle degree.

Preferably, the flexible connection is that screw rod is sequentially passed through to suspension ring, the ruler 1 of freely sagging pointer 3, then by nut It is fixed on the rear side of ruler 1.

Operation principle of the present utility model is as follows：

As shown in Fig. 2 when freely sagging pointer 3 points to the same number of degrees such as " 0 ", the line segment for being not at same horizontal line is drawn AB, CD, then AB//CD, as AB=CD, then quadrangle ABCD is parallelogram.

As shown in figure 3, when free sagging pointer 3 points to α₁When, setting-out section AB, by line segment AB central point O, in freedom Sagging pointer 3 points to α₂When and | α₁-α₂|=90⁰When, setting-out section CD, and OC=OD, tetra- points of AC, CB, DB, AD are connected, then four sides Shape ADBC is rhombus.

When the horizon rule used time, ruler 1 is contacted without scale side with ground, when freely sagging pointer 3 points to 0 degree, said Bright ground level；The base of ruler 1 is contacted with metope, when freely sagging pointer 3 points to 90 degree, illustrates that metope is vertical.

As shown in figure 4, drawing an angle is equal to known angle, a ray OA is drawn, when ruler is around O point rotation alpha degree, picture ray OB, then ∠ AOB=α⁰。

The elevation angle and the angle of depression of test object, ruler 1 is overlapped without scale side with the side of object, see freely sagging pointer institute The elevation angle and the angle of depression of the angle of finger, as test object.

Claims

1. a kind of drawing ruler, including ruler with a scale, it is characterised in that be provided with measurable angle in any side of ruler Angle dial and freely sagging pointer, the angle dial graduation mark are 0 by central point⁰And rotated from central point to both sides 90⁰Circular arc composition, be connected with the sagging pointer of rotatable freedom, and free dropped finger in the circle centre position of angle dial Pin orientation angle dial 0⁰Graduation mark, the both sides that same horizontal line is in the center of circle are 90⁰Graduation mark, and the center of circle and both sides 90⁰ Graduation mark, which is located at ruler, a scale side, and 0⁰Graduation mark is located at ruler without scale side.

2. drawing ruler according to claim 1, it is characterised in that the sagging pointer of freedom is in horizontality in ruler When, freely sagging pointer points to 0 degree, ruler with it is horizontal at an angle when, then freely the angle of sagging pointer sensing is exactly Ruler and horizontal institute's angle degree.

3. drawing ruler according to claim 1, it is characterised in that the opposite side of the ruler is provided with to be connected with angle dial The cross bar connect, is arranged with handle on cross bar.

4. drawing ruler according to claim 1, it is characterised in that the flexible connection is to sequentially pass through screw rod under freedom Suspension ring, the ruler of vertical pointer, then nut is fixed on rear side of ruler.