CN2905477Y - multifunctional compasses - Google Patents

Abstract

A multifunctional compasses, the utility model relates to the structural technology of compasses. It includes a center leg and a marking leg that are hinged to each other at one end, the other end of the center leg is connected to the center needle, and the other end of the marking leg is connected to a scriber, on the two legs that are equidistant from the hinge point A straight connecting rod is respectively hinged, and the other ends of the two connecting rods are hinged to each other. There is a continuous length unit scale on one side of the two connecting rods, and a connected angle unit scale on the other side of the two connecting rods. . When the two legs of the compass are at right angles to each other, the connecting rod is the hypotenuse of an isosceles right triangle, and one side is engraved with a scale of length units, and the other side is engraved with scales of angle units, so that the compass has a triangular ruler at the same time and protractor functions. The utility model integrates the compasses, the triangular ruler and the protractor into one, which is convenient to carry, does not affect normal use, saves production materials, saves less waste.

Description

multifunctional compasses

technical field

The utility model relates to a teaching equipment, in particular to the structure technology of a compasses.

Background technique

Compasses, triangular rulers and protractors are commonly used teaching tools for teachers in large, middle and primary schools. Due to the large size of the triangle ruler and the protractor, it is extremely inconvenient to carry. Therefore, if these three kinds of commonly used teaching aids can be combined into one, to reduce volume and facilitate use, it has great practical value.

Utility model content

The purpose of the utility model is to design a multifunctional compass which is convenient to carry.

The utility model comprises a circle center leg and a marking leg which are hinged to each other at one end, the other end of the circle center leg is connected with a circle center needle, the other end of the marking leg is connected with a marking device, two A straight connecting rod is respectively hinged on the outriggers, and the other ends of the two connecting rods are hinged to each other. A continuous length unit scale is provided on one side of the two connecting rods, and a connecting rod is provided on the other side of the two connecting rods. Angle unit scale.

The utility model adds two connecting rods on the basis of ordinary compasses. When the two legs of the compasses are at right angles to each other, the connecting rods are the hypotenuses of an isosceles right-angled triangle, and the length unit scale is engraved on one side; Angle unit scales are engraved, so that the compass has the functions of a triangle ruler and a protractor at the same time. The two connecting rods are hinged to each other so that they can freely expand and contract with the change of the angle between the two legs of the compass (ie the radius of the circle), thus not affecting the normal use of the compass. The utility model integrates the compasses, the triangular ruler and the protractor into one, which is convenient to carry, does not affect the normal use, saves production materials, saves less waste.

In addition, the utility model also hinges a short ruler on the center leg, and the hinge joint point of the short ruler is located at a quarter of the end of the center needle end from the hinge joint point of the circle center leg and the marking leg. A reading point is set on the leg, and the reading point is set at a quarter from the hinge connection point of the center leg and the scribed leg to the end of the scriber, and a 1:4 scale is provided on the short ruler. The radius of any circle or arc can be read on a short ruler.

Angle units can also be provided on the short ruler, which can be used as a fixed protractor.

Above-mentioned two connecting rods are equal in length. Easy to fold.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

FIG. 2 is a schematic view of the reverse side of FIG. 1 .

Detailed ways

As shown in Figures 1 and 2, one end of the center leg 1 and the marking leg 2 are hinged to each other, the other end of the center leg 1 is connected with the center needle 3, and the other end of the marking leg 2 is connected with a marker 4, such as drawing a pen.

Straight connecting rods 5 and 6 of equal length are hinged respectively on two supporting legs 1 and 2 equidistant from the hinge connection point, and the other ends of the two connecting rods 5 and 6 are hinged to each other. A continuous length unit scale 7 is provided on one side of the two connecting rods 5,6, and a connected angle unit scale 8 is provided on the other side of the two connecting rods 5,6.

A short chi 9 is hinged on the center leg 1, and the hinge point of the short chi 9 is positioned at a quarter of the center pin 3 ends from the hinge point of the center leg 1 and the marking leg 2. Set the reading point 12 on the marking leg 2, such as the mark, or the groove, and the reading point 12 is located at a quarter of the center of the leg 1 and the hinge joint of the marking leg 2 to the end of the marking device 4 At the place, a 1:4 scale 10 is provided on the short ruler 9, and an angle unit 11 is provided on the other side.

Claims (4)

1. Multifunctional compasses, including a center leg and a marking leg that are hinged to each other at one end, the other end of the center leg is connected to a center needle, and the other end of the marking leg is connected to a scriber. A straight connecting rod is respectively hinged on the two outriggers at equidistant points, and the other ends of the two connecting rods are hinged to each other. There is a continuous length unit scale on one side of the two connecting rods. On the other side there is an attached angular unit scale. 2. The multifunctional compasses according to claim 1, characterized in that a short ruler is hinged on the center leg, and the hinge joint point of the short ruler is located between the hinge joint point of the circle center leg and the marking leg to the end of the center needle. At a quarter, the reading point is set on the marking leg, and the reading point is set at the quarter of the end of the scriber from the hinge connection point of the center leg and the marking leg, and the short ruler is set There is a scale of 1:4. 3. The multifunctional compasses according to claim 2, characterized in that angle units are set on the short ruler. 4. The multifunctional compass according to claim 1, 2 or 3, characterized in that the two connecting rods are of equal length.

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