CN104669884A

CN104669884A - Ruler for drawing symmetric figure

Info

Publication number: CN104669884A
Application number: CN201510087320.XA
Authority: CN
Inventors: 江涛; 程鹏飞
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2015-02-26
Filing date: 2015-02-26
Publication date: 2015-06-03
Anticipated expiration: 2035-02-26
Also published as: CN104669884B

Abstract

The invention relates to a ruler for drawing a symmetric figure. A left slide rail and a right slide rail are arranged on a main ruler; a slide block penetrates through the left slide rail and the right slide rail and slides on the main ruler; a gearbox base and a gearbox cover are arranged above the slide block; the lower end of the gearbox box penetrates through the slide block and is connected with a rotary sheet; a gear, a gear rack A and a gear rack B are arranged in a gearbox; rotary shafts penetrate through the gear, the gear rack A and the gear rack B; two grooves are formed in the upper surface of the main ruler; brush inserting holes are respectively formed in one side of each of the gear rack A and the gear rack B; strip holes are respectively formed in the centers of the gear rack A and the gear rack B; the rotary shafts at the two sides penetrate through the strip holes; a gap groove is formed in the main ruler, is aligned with a symmetric shaft, and is pressed and fixed by a hand; brushes are inserted into the brush inserting holes in the tail ends of the gear rack A and the gear rack B; the gear rack at one side horizontally moves to drive the gear rack at the other side to move, and the brushes horizontally move to drive the gear rack A and the gear rack B to horizontally move, and move up and down to drive the slide block to move up and down. The ruler has the advantages that the structure is simple and reasonable, and the drawing efficiency is high, and the practicality is high.

Description

A kind of ruler drawing symmetric figure

Technical field

The present invention relates to a kind of ruler, particularly a kind of ruler drawing symmetric figure.

Background technology

In the process of our drawing, can often need to draw out some axisymmetric figures, usually ruler is relied on, the simple drafting instrument such as compasses, next rough draws out zhou duicheng tuxing, have very large error, be difficult to draw zhou duicheng tuxing exactly, its precision is largely decided by hand drawing.Needs draw accurately symmetric figure time, also the zhou duicheng tuxing masterplate of half can first be made to carry out inscription rubbing, or first draw the zhou duicheng tuxing of half, then by paper along symmetry axis doubling, with half lithography first finished to another side, be combined into symmetrical figure, but adopt these two kinds of modes virtually to have impact on drawing efficiency, its process is loaded down with trivial details, has certain destruction to paper.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of ruler drawing symmetric figure, zhou duicheng tuxing can be drawn out well, there is simple and reasonable for structure, that drawing efficiency is high and practical advantage.

To achieve these goals, the technical solution used in the present invention is: a kind of ruler drawing symmetric figure, comprise main scale, left slide rail and right slide rail is provided with above main scale, slide block slides on main scale through left slide rail and right slide rail, has gear-box base and gear box cover above slide block, and gear-box base lower end is connected with rotor through slide block, gear-box inside is provided with gear, tooth bar A and tooth bar B, and rotating shaft is through gear, tooth bar A and tooth bar B;

Described main scale upper surface has two grooves, and when slide block slides on left slide rail and right slide rail, its bottom sides, along shuttling back and forth in groove, does not contact with groove;

There is pen plughole described tooth bar A and the side of tooth bar B;

Described tooth bar A and the central authorities of tooth bar B are equipped with elongated hole, and the rotating shaft of both sides through elongated hole, and is rotated in elongated hole;

There are the centrally slot that arranges of axle in the central authorities of described main scale.

Described rotor is connected with below described slide block, and gear-box base can be fixed in the both direction with main scale horizontal and vertical when rotating.

Described tooth bar A and tooth bar B horizontal symmetrical are placed, and divide two sides being in gear, tooth bar A and tooth bar B is all meshed with gear; One of them motion of tooth bar A or tooth bar B, another will produce the displacement of onesize opposed gear, ensure that the end pen plughole of tooth bar A and tooth bar B is equal apart from the distance of gear.

All on the same line, this central vertical, in the surface of main scale, is positioned at the slot through main scale central authorities at the center of described rotor, slide block, gear-box base, gear, gear box cover.

The upper surface of described gear-box base and the inner top surface of gear box cover all have the rotary axis groove placing rotating shaft.

Described rotating shaft is made up of each one group 3, both sides and a middle axle; Wherein, middle axle passes centre bore and the gears meshing of gear, and upper and lower two ends are fixed in the rotary axis groove of gear-box base and gear box cover; 3 rotating shafts of every side are all through tooth bar A, tooth bar B elongated hole, and upper and lower two ends are fixed in the rotary axis groove of gear-box base and gear box cover.

The surface of described main scale is provided with scale, numeral and unit.

Compared with prior art, the present invention is provided with can the tooth bar A of left and right push-and-pull and tooth bar B, tooth bar A and tooth bar B is by the engagement action with gear, the gear-box base installing tooth bar A and tooth bar B can left slide rail on main scale and right slide rail slide, zhou duicheng tuxing can be drawn well, drawing efficiency and accuracy can be improved simultaneously, solve this problem of picture symmetric figure difficulty, there is boundless application prospect and huge market.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Schematic diagram when Fig. 2 is use of the present invention.

Schematic diagram when Fig. 3 is of the present invention carrying.

Fig. 4 is the structural representation of tooth bar A of the present invention.

Fig. 5 is the partial enlarged drawing of Fig. 1.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further details.

See Fig. 1,2,3,4,5, a kind of ruler drawing symmetric figure, comprise main scale 1, left slide rail 2 and right slide rail 3 is provided with above main scale, slide block 10 slides on main scale 1 through left slide rail 2 and right slide rail 3, has gear-box base 9 and gear box cover 4 above slide block, and gear-box base 9 lower end is connected with rotor 11 through slide block 10, gear-box inside is provided with gear 8, tooth bar A5 and tooth bar B6, and rotating shaft 7 is through gear 8, tooth bar A5 and tooth bar B6;

Described main scale 1 upper surface has two grooves, and when slide block 10 slides on left slide rail 2 and right slide rail 3, its bottom sides, along shuttling back and forth in groove 15, does not contact with groove;

There are the centrally slot 14 that arranges of axle in the central authorities of described main scale 1.

Described rotor 11 is connected with below described slide block 10, and gear-box base 9 can be fixed in the both direction with main scale 1 horizontal and vertical when rotating.

Described tooth bar A5 and tooth bar B6 horizontal symmetrical are placed, and divide two sides being in gear 8, tooth bar A5 and tooth bar B6 is all meshed with gear 8.As long as one of them motion of tooth bar A5 or tooth bar B6, another will produce the displacement of onesize opposed gear 8, ensure that the end pen plughole of tooth bar A5 and tooth bar B6 is equal apart from the distance of gear 8.

Described tooth bar A5 and the central authorities of tooth bar B6 are equipped with elongated hole, make the rotating shaft 7 of both sides through elongated hole 12, and rotate in elongated hole 12.

There is pen plughole 13 described tooth bar A5 and the side of tooth bar B6, vertically insert for paintbrush.

All on the same line, this central vertical, in the surface of main scale 1, is positioned at the slot 14 through main scale 1 central authorities at the center of described rotor 11, slide block 10, gear-box base 9, gear 8, gear box cover 4.

The upper surface of described gear-box base 9 and the inner top surface of gear box cover 4 all have the rotary axis groove 16 placing rotating shaft 7.

The upper-lower position of slide block 10 is the same with regard to the different ordinates of formation point each in image pattern, gear-box can rotate relative to slide block 10, ensure carry hour rack A5 can be parallel with main scale 1 with tooth bar B6, too many space can not be accounted for, rotating shaft 7 is through gear 8, tooth bar A5 and tooth bar B6, and the two ends up and down of rotating shaft 7 are fixed in the rotary axis groove of gear-box base 9 and gear box cover 4.

Described rotating shaft 7 is made up of each one group 3, both sides, a middle axle.Wherein, middle axle engages with gear 8 through the centre bore of gear 8, and upper and lower two ends are fixed in the rotary axis groove of gear-box base 9 and gear box cover 4; 3 rotating shafts of every side are all through tooth bar A5, tooth bar B6 elongated hole, and upper and lower two ends are fixed in the rotary axis groove of gear-box base 9 and gear box cover 4.

The surface of described main scale 1 is provided with scale, numeral and unit.

Operation principle of the present invention is:

See Fig. 2, the axis of symmetry of this symmetric figure is determined when drawing symmetric figure, then the central slot of main scale 1 is aimed at this symmetry axis, fixing with hand pressing, two paintbrushes are inserted the pen plughole of the end of tooth bar A5 and tooth bar B6, because tooth bar A5 and tooth bar B6 is meshed with gear 8, so the tooth bar of opposite side can be driven after the tooth bar horizontal movement of side to move, the horizontal movement band carry-over bar A5 of paintbrush and the horizontal movement of tooth bar B6, move up and down and be with moving up and down of movable slider 10, the paintbrush of side changes position and opposite side paintbrush will be driven in the position of symmetry, so when the paintbrush of side draws a paths, opposite side will produce symmetrical path, two paths, left and right will be combined into an axisymmetric figure, reach the object drawing accurate zhou duicheng tuxing.

Claims

1. can draw the ruler of symmetric figure for one kind, comprise main scale (1), left slide rail (2) and right slide rail (3) is provided with above main scale, slide block (10) slides on main scale 1 through left slide rail (2) and right slide rail (3), gear-box base (9) and gear box cover (4) is had above slide block, gear-box base (9) lower end is connected with rotor (11) through slide block (10), gear-box inside is provided with gear (8), tooth bar A (5) and tooth bar B (6), rotating shaft (7) is through gear (8), tooth bar A (5) and tooth bar B (6),

Described main scale (1) upper surface has two grooves, and when slide block (10) slides on left slide rail (2) and right slide rail (3), its bottom sides, along shuttling back and forth in groove (15), does not contact with groove;

There is pen plughole (13) described tooth bar A (5) and the side of tooth bar B (6);

Described tooth bar A (5) and the central authorities of tooth bar B (6) are equipped with elongated hole, and the rotating shaft (7) of both sides through elongated hole (12), and is rotated in elongated hole (12);

There are the centrally slot (14) that arranges of axle in the central authorities of described main scale (1).

2. a kind of ruler drawing symmetric figure according to claim 1, it is characterized in that, described rotor (11) is connected with described slide block (10) below, and gear-box base (9) can be fixed in the both direction with main scale (1) horizontal and vertical when rotating.

3. a kind of ruler drawing symmetric figure according to claim 1, it is characterized in that, described tooth bar A(5) and tooth bar B(6) horizontal symmetrical placement, divide two sides being in gear (8), tooth bar A(5) and tooth bar B(6) be all meshed with gear (8); Tooth bar A(5) or tooth bar B(6) one of them motion, another will produce the displacement of onesize opposed gear (8), ensure that tooth bar A(5) and tooth bar B(6) end pen plughole distance gear (8) distance equal.

4. a kind of ruler drawing symmetric figure according to claim 1, it is characterized in that, the center of described rotor (11), slide block (10), gear-box base (9), gear (8), gear box cover (4) all on the same line, this central vertical, in the surface of main scale (1), is positioned at the slot (14) through main scale (1) central authorities.

5. a kind of ruler drawing symmetric figure according to claim 1, is characterized in that, the upper surface of described gear-box base (9) and the inner top surface of gear box cover (4) all have the rotary axis groove (16) of placement rotating shaft (7).

6. a kind of ruler drawing symmetric figure according to claim 1, is characterized in that, described rotating shaft (7) is made up of each one group 3, both sides and a middle axle; Wherein, middle axle engages with gear (8) through the centre bore of gear (8), and upper and lower two ends are fixed in the rotary axis groove of gear-box base (9) and gear box cover (4); 3 rotating shafts of every side are all through tooth bar A(5), tooth bar B(6) elongated hole, upper and lower two ends are fixed in the rotary axis groove of gear-box base (9) and gear box cover (4).