CN204095362U - Combined compasses - Google Patents

Abstract

The utility model relates to a combined compasses, which is that the lower end of the supporting leg of the existing compasses is hinged to a connecting rod, the lower end of the connecting rod is connected with a center rod or a marking rod, and the center rod and the marking rod are respectively connected with corresponding The inner sides of the rods are aligned, guide grooves are set on the connecting rods, the guide grooves move along the guide rod ruler, and the legs of the compasses are hinged with the connecting rods, which can effectively ensure that the center rod and the marking rod are always perpendicular to the paper surface when drawing , the center rod and the marking rod are respectively aligned with the inner side of the corresponding connecting rod, so as to ensure the accurate size of the circle drawn, and the scale is set on the guide rod ruler, which is convenient for the drawing personnel to determine the radius of the circle drawn, without additional Then prepare a straight edge, which is simple in structure, convenient to use, easy to carry, and accurate in drawing.

Description

Combined compasses

Technical field:

The utility model relates to a drawing tool, in particular to a combined compasses with a straightedge that can measure the radius of a drawn circle.

Background technique:

The traditional compass used to draw a circle is generally composed of outriggers, a center pin, a marking rod and a handle. When people draw a circle, they need to use a ruler to measure the distance between the center pin and the marking rod to determine After drawing the radius of the circle, turn the handle on the paper and draw the desired circle. Drawing a circle requires at least a ruler and a compasses. Two drawing tools are more troublesome to operate.

In addition, in traditional compasses, after the center needle and the marking rod are opened at a certain angle, the angle between the center needle and the marking rod and the paper surface is less than 90°, which is not conducive to the positioning of the center needle, and is also not conducive to when the marking rod marks the line. The control of line width is also very inconvenient to operate.

In order to solve the above technical problems, technicians have developed some new types of compasses, such as the Chinese utility model patent with the patent number "ZL2013 20046698.1" and the patent name "A New Type of Precision Compass". A tape measure is set between the pen feet (marking rods), which can solve the problem of measuring the radius of the circle when drawing a circle. At the same time, its disclosed compass pen foot and compass foot structure can also solve the problem of perpendicularity between the center rod and the marking rod and the paper surface. Problem, however, this novel precision compasses has complicated structure, high cost, many parts and components, compass belongs to drawing tool commonly used, so complicated structure, expensive compasses are difficult to be accepted by people.

For example, the patent number is "ZL201220757302.X", and the Chinese utility model patent named "compass" is to fix the leg of the compass to one end of the ruler, and the pen leg of the compass slides along the ruler, so that the drawn circle can be determined. However, as we all know, when drawing a circle, the radius of the circle is realized by measuring the tip of the compass leg and the tip of the pen tip. However, this In the patent, the circle radius is measured by measuring the side of the foot and the center position of the slider. The circle radius obtained is not accurate and is not the real radius of the drawn circle, resulting in inaccurate drawing.

Utility model content:

In summary, in order to overcome the deficiencies of the prior art problems, the utility model provides a combined compass, which is to hinge the lower end of the legs of the existing compasses to the connecting rod, the lower end of the connecting rod to the center rod or the marking line The rods are connected, and the center rod and the marking rod are respectively aligned with the inner sides of the corresponding connecting rods. A guide groove is set on the connecting rod, the guide groove moves along the guide rod ruler, and the compass legs are hinged with the connecting rod, which can effectively ensure When drawing, the center rod and the marking rod are always perpendicular to the paper surface, and the center rod and the marking rod are respectively aligned with the inner side of the corresponding connecting rod, so as to ensure the accurate size of the circle drawn. There is a scale on the guide rod ruler , it is convenient for the drawing personnel to determine the radius of the drawn circle, no additional preparation of a ruler is required, the structure is simple, easy to use, easy to carry, and the drawing is accurate.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A combined compasses, which includes a handle, supporting legs, a center rod, a marking rod and a guide rod ruler, the upper ends of the two supporting legs are connected to the handle, and the lower ends of the two supporting legs are hinged with connecting rods, the connecting rods The upper end is hinged with the outrigger, and the lower end of the connecting rod is respectively connected with the center rod and the marking rod. The middle part of the connecting rod is provided with a guide groove, and a guide rod ruler is installed in the guide groove, and the connecting rod and the guide rod ruler are arranged on the The top screw on the guide groove is locked, and the guide bar ruler is provided with a scale line.

Further, the lower end of the center rod is aligned with the inner side of the connected connecting rod, and the lower end of the marking rod is aligned with the inner side of the connected connecting rod.

Further, the connecting rod is connected with the upper part of the center rod through a tightening bolt, and the connecting rod is connected with the upper part of the marking rod through a tightening bolt.

Further, the marking rod is a pencil-type marking rod, and the pencil tip of the pencil-type marking rod is aligned with the inner side of the connected connecting rod; the marking rod may be a marking steel needle, and the needle point of the marking steel needle align with the inside edge of the connecting rod.

Further, the center rod is a center steel needle, and the needle point of the center steel needle is aligned with the inner side of the connected connecting rod; the center rod may be a suction cup type center rod, and the center of the suction cup of the suction cup type center rod is connected Align the inside edges of the rods.

The beneficial effects of the utility model are:

1. The utility model is to hinge the lower end of the leg of the existing compass to the connecting rod, the lower end of the connecting rod is connected with the center rod or the marking rod, and the center rod and the marking rod are respectively aligned with the inner side of the corresponding connecting rod , a guide groove is set on the connecting rod, the guide groove moves along the guide rod ruler, and the legs of the compasses are hinged with the connecting rod, so that it can effectively ensure that the center rod and the marking rod are always perpendicular to the paper surface when drawing, The rods are respectively aligned with the inner sides of the corresponding connecting rods, so as to ensure the accurate size of the drawn circle. There is a scale on the guide bar ruler, which is convenient for the drawing personnel to determine the radius of the drawn circle, and no need to prepare a ruler. The structure Simple, easy to use, easy to carry, accurate drawing.

2. The center rod of the present invention can be a steel needle or a sucker-type center rod. The sucker-type center rod can facilitate the drawing operation of the utility model on hard materials.

3. The marking rod of the present utility model can be a marking steel needle, a pencil-type marking rod, or some other marking devices, so that the utility model can be used as a pencil-type compasses, or as a The use of dividers can also be used as other forms of compasses, such as pen compasses, which have powerful functions.

4. The lower end of the center rod and the lower end of the marking rod of the utility model are respectively aligned with the inner side of the corresponding connecting rod 6, which can effectively ensure that the reading of the guide rod ruler is the reading between the lower end of the center rod and the lower end of the marking rod , so as to ensure the accuracy of the radius of the drawn circle center.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the left view schematic diagram of Fig. 1 of the utility model;

Fig. 3 is the structural representation of the sucker type center rod of the utility model;

Fig. 4 is the structural representation of the pencil type marking bar of the present utility model;

Fig. 5 is a structural schematic diagram of the utility model in the maximum state where the outriggers are opened.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, Figure 2, Figure 3, and Figure 4, a combined compass includes a handle 1, legs 2, a center rod 3, a marking rod 4 and a guide rod ruler 5, and the upper ends of the two legs 2 are connected to the The handle 1 is connected, the lower ends of the two supporting legs 2 are hinged with a connecting rod 6, the upper end of the connecting rod 6 is hinged with the supporting legs 2, the lower end of the connecting rod 6 is connected with the center rod 3 and the marking rod 4 respectively, and the connecting rod 6 is connected with the marking rod 4. The upper part of the center rod 3 is connected by a tightening bolt, and the connecting rod 6 is connected with the upper part of the marking rod 4 by a tightening bolt. The marking rod 4 is a marking steel needle, and the tip of the marking steel needle is connected to the connected connecting rod. 6 inner sides are aligned, the center rod 3 is a center steel needle, the needle point of the center steel needle is aligned with the inner side of the connected connecting rod 6, the middle part of the connecting rod 6 is provided with a guide groove 7, and the guide groove 7 is equipped with guide rod ruler 5, and connecting rod 6 and guide rod ruler 5 are locked by jackscrew 8 that is arranged on the guide groove 7, and guide rod ruler 5 is provided with scale mark 9.

As shown in Figure 5, when in use, align the inner side of a connecting rod 6 with the "0" scale position of the guide rod ruler 5, and lock it by locking the top screw 8, and then connect the center rod 3 to the connecting rod 6 connection; after that, move another connecting rod 6 so that its inner side is aligned with the corresponding circular radius size, and connect the marking rod 4 with the connecting rod 6; finally, with the center rod 3 as the center of the circle, turn the handle 1, Line bar 4 draws a circle on paper.

The center bar 3 of the utility model is a center steel needle, and when the marking bar 4 is a marking steel needle, the utility model can be used as a divider and can also draw circles.

The center rod 3 of the utility model is a steel needle at the center of the circle, and when the marking rod 4 is a pencil-type marking rod 4, the utility model can draw a circle on drawing paper, and of course, it can also be drawn where other pencils can draw graphics. round.

When the center rod 3 of the utility model is a sucker type center rod 3, the utility model can be used to draw a circle on the hard material.

It should be noted that the above-mentioned embodiments are illustrations and not limitations to the technical solution of the utility model, equivalent replacements by those of ordinary skill in the art or other modifications made according to the prior art, as long as they do not exceed the technical solution of the utility model The idea and scope of the invention should be included in the scope of rights required by the utility model.

Claims (5)

1. A combined compass, characterized in that it includes a handle (1), legs (2), center rod (3), marking rod (4) and guide rod ruler (5), two legs (2 ) is connected to the handle (1), the lower ends of the two legs (2) are hinged with connecting rods (6), the upper ends of the connecting rods (6) are hinged with the legs (2), and the lower ends of the connecting rods (6) are respectively It is connected with the center rod (3) and the marking rod (4), the middle part of the connecting rod (6) is provided with a guide groove (7), and the guide groove (7) is equipped with a guide rod ruler (5), and connected The rod (6) and the guide rod ruler (5) are locked by the top screw (8) arranged on the guide groove (7), and the guide rod ruler (5) is provided with a scale line (9). 2. The combined compasses according to claim 1, characterized in that: the lower end of the center rod (3) is aligned with the inner side of the connected connecting rod (6), and the lower end of the marking rod (4) is aligned with the connected connecting rod (6). Align the inside edges of the connecting rods (6). 3. The combined compasses according to claim 1, characterized in that: the connecting rod (6) and the upper part of the center rod (3) are connected by fastening bolts, and the connecting rod (6) and the marking rod (4) The upper part is connected by set bolts. 4. The combined compasses according to claim 1, characterized in that: the marking rod (4) is a pencil marking rod, and the pencil tip of the pencil marking rod (4) is connected to the connecting rod (6) Align the inner side; the marking rod (4) may be a marking steel needle, and the needle tip of the marking steel needle is aligned with the inner side of the connected connecting rod (6). 5. The combined compasses according to claim 1, characterized in that: the center rod (3) is a center steel needle, and the tip of the center steel needle is aligned with the inner side of the connected connecting rod (6); The center rod (3) may be a suction cup type center rod (3), and the center of the sucker of the suction cup type center rod (3) is aligned with the inner edge of the connecting rod (6).