CN2260310Y

CN2260310Y - Multi-function ruler for drawing

Info

Publication number: CN2260310Y
Application number: CN 96235832
Authority: CN
Inventors: 王建刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-24
Filing date: 1996-04-24
Publication date: 1997-08-20
Anticipated expiration: 2006-04-24

Abstract

The utility model relates to a multi-function ruler for drawing which is composed of a transparent double layer, a main scale, and a vernier which are connected together. The utility model which can be used for teaching has the functions of measuring angles, painting angles, measuring arcs, painting arcs, equally dividing circles and angles, and drawing straight lines of engineering drawing, and the multi-function ruler for drawing can also paint out a polar diagram, and can find out the sine value, cosine value, arcsine value, and inverse cosine value of arbitrary angle. The utility model has the advantages of firm structure, accurate drawing precision, convenient use and portability.

Description

Multi-functional graphometric square

The utility model relates to and a kind ofly is used to impart knowledge to students and the technical field of the multi-functional surveying and mapping tool of Graphing of Engineering.

It is at present, disclosed that Granted publication day is arranged is that 1995.7.5 day China patent No. is ZL.9329466.3 " multiple use angle protractor ".It is formed by connecting by a ruler and Angle protractor.Its weak point has: the 1. center of circle of throughput hornwork not, two of ruler setting-out limits; 2. ruler and Angle protractor are formed not contour; 3. the degree of accuracy of protractor is not high, draws, the measured angular arc is not accurate enough; 4. the part of structure is thin, and is easily impaired; 5. function is limited.

The purpose of the utility model patent is for fear of above-mentioned weak point, and having related to a kind of main scale is double-deck rectangle; The collinear multi-functional graphometric square in the vernier edge and the center of circle, junction.

The realization of the utility model patent purpose is by following measure: main scale is double-deck, by upper plate and lower shoe is bonding forms.The lower shoe face is provided with the horn craving scale, and plate edge is a slope, with the internal circle slope formation vernier groove of upper plate.The center is provided with the circular shaft of convex, and the upper left corner is furnished with the circular hole group of different-diameter, and millimeter lattice are carved with in the upper right corner.Coboundary and right hand edge are carved with a millimeter scale.Upper plate is provided with the center of circle half groove, and trough rim is established slope, and the upper left corner is furnished with and the identical circular hole group of lower shoe.

Also will be by following measure: for vernier one end of fan-like pattern is provided with the circular shaft hole, outward flange be and the slope of the upper plate center of circle half groove slope same tilt degree that the other end is provided with the 20 calibration verniers that subtended angle is 19 degree.And its section is taper.The vernier left hand edge is the scale limit, with center, circular shaft hole in line.Be furnished with the pen plughole eye on the vernier face, be divided into three rows, respectively at 5 ° of lines, 10 ° of lines on 20 ° of lines, also are carved with a millimeter scale on 15 ° of lines.The vernier hole circle heart and edge are used to ask trigonometric function at a distance of 10cm.

The utility model patent compared with the prior art advantage is as follows:

1. reasonable in design, sound construction uses, and it is all convenient to carry.

2. vernier and main scale are contour, and slide in the vernier groove, are difficult for impaired.

3. be carved with 20 calibration verniers on the vernier, make the mapping angle more accurate.

4. utilize the millimeter lattice in the vernier and the upper right corner, can know the hypotenuse and the right-angle side length at arbitrary angle, and hypotenuse just in time is designed to 10cm, can obtain the sine and cosine value at any angle easily, and can be used for negating sine and arc cosine.

5. the vernier left hand edge is crossed the center of circle, utilizes the millimeter scale on angle scale and the vernier edge, can utilize trace-point method to paint polar plot easily.

6. the pen plughole eye on the vernier is reasonable in design, can accomplish every millimeter all porose, as to use different radii that can draw, the circular arc of different angles.

7. utilize the double-decker of main scale, be provided with interlayer, can take out the dress curriculum schedule, instructions, calendar card etc. in the main scale lower left corner.

The explanation of accompanying drawing drawing:

Fig. 1: multi-functional graphometric square synoptic diagram

Fig. 2: vernier synoptic diagram

Fig. 3: the lower shoe synoptic diagram of main scale

Fig. 4: the upper plate synoptic diagram of main scale

The utility model patent is described in further detail implementing below in conjunction with accompanying drawing:

Fig. 3: on lower shoe (1-2) face of main scale (1), be furnished with angle scale (12), upwards carve the millimeter scale, again since 90 ° of degree, along lower shoe (1-2) coboundary delineation millimeter scale since 0 ° along lower shoe (1-2) right hand edge.And for the upper right corner, the millimeter groove of coboundary and right hand edge will arrive till angle scale (12) outward flange, thereby forms millimeter lattice (11) in lower shoe (1-2) upper right corner.Lower shoe (1-2) upper left corner is furnished with the circular hole group (2-2) of different-diameter, is used for the roundlet that the picture vernier is not drawn.Lower shoe (1-2) is provided with convex circular shaft (6) at the angle scale circle centre position, is injection molded into half sandwich chamber (4-2) in the lower left corner.Whole lower shoe is that transparent organic glass is injection molded, stamps pinprick at the circle centre position upper and lower surface of lower shoe circular shaft (6), and is coated with the bottom surface pinprick with black, is used for determining the center of circle.

Fig. 4: on upper plate (1-1) face of main scale (1), be provided with the center of circle half groove (13), inward flange is that slope matches with the slope in vernier circular shaft hole (7), makes the vernier difficult drop-off so that push down vernier.Be provided with lower shoe (1-2) in the upper left corner and finish identical circular hole group (2-1), be provided with injection molded half sandwich chamber (4-1) in addition in the lower left corner, the same size of half sandwich chamber (4-2) with lower shoe (1-2), form interlayer (4) together, in the middle of the lower limb of half sandwich chamber (4-1) of upper face a breach (4-3) is arranged, be used for extracting out the thing of interlayer (4).Upper face (1-1) also is injection molded with transparent organic glass.

Fig. 2: on the vernier (3), one end is carved with the vernier (10) of 20 calibration, left hand edge is carved with a millimeter scale (9), and left hand edge is by the center of circle in the circular shaft hole (7) of vernier (3) other end, also be provided with pen plughole eye (8) on the vernier face, the aperture is 1.5mm, and heart distance in hole is 3mm, for dividing three rows, the line of centres of each round all passes through the center of circle of circular shaft hole (7); Three round eyes are respectively at 5 ° of lines, on 10 ° of lines and the 20 ° of lines, are carved with a millimeter scale in addition on 15 ° of lines.The outer circumferential edge in circular shaft hole (7) is a slope, is complementary with the slope of the center of circle half groove (13) of upper plate (1-1).The section of the other end of vernier (3) is that the vernier groove (5) of taper and main scale (1) is complementary.Vernier (3) also is injection molded with transparent organic material.

Fig. 1: the circular shaft hole (7) of vernier (3) is enclosed within on the circular shaft (6) of lower shoe (1-2), the other end of vernier just is placed on the slope of angle scale (12), again transparent upper face (1-1) being aimed at lower shoe (1-2) edge puts, constitute main scale (1) with the bonding upper and lower plate of adhesive, vernier (3) just can be enclosed within circular shaft (6) and go up slip in vernier groove (5).

Claims

1. the utility model relates to a kind of multi-functional graphometric square, and it is made of main scale and vernier, and its technical characterictic is: main scale (1) is upper plate (1-1) and the bonding double-decker that forms of lower shoe (1-2); Main scale (1) locates to be provided with the vernier groove at angle scale (12); Be carved with millimeter lattice (11) at angle scale (12) outward flange, and angle scale (12) outward flange arc radius is 10 centimetres.

2. multi-functional graphometric square according to claim 1, its technical characterictic is: vernier (3) one ends are provided with circular shaft hole (7), match with lower shoe circular shaft (6), and the outward flange of circular shaft hole (7) is slope, matches with the slope of the center of circle half groove (13) of upper plate (1-1).

3. according to claim 1,2 described multi-functional graphometric squares, its technical characterictic is: be carved with 20 calibration verniers (10) on the vernier (3).

4. according to claim 1,2 described multi-functional graphometric squares, its technical characterictic is: the left hand edge of vernier (3) is crossed the center of circle of circular shaft hole (7).