JP2001205984A - Compass with measure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compass with a measure capable of drawing or cutting a circular shape, an arc shape or an arbitrary design of a large size which cannot be drawn by a conventional stationery or drafting compass. SOLUTION: A conventional compass using two legs fixed at one point to each other by arbitrarily opening the legs is improved to two posts independent from the connected two legs. The posts are connected by a measuring tape such as made of a steel. Thus, an interval of the two supporting legs is largely enlarged, and the large circular shape or the arc shape of several times as large as the conventional one can be drawn or cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compass capable of drawing or cutting large circles, arcs, or any other shapes.

[0002]

2. Description of the Related Art Conventionally, a compass has two legs that can be opened and closed at an arbitrary angle, and the legs are opened to draw a circle or an arc. In that case, the length of the leg and the maximum degree of leg opening were the limits of the size of the circle or arc drawn by the compass. Conventionally, when cutting paper, cloth, or the like into a circle, an arc, or another shape, the lower diagram is drawn on the material in advance, and cut out with scissors or a cutter knife or the like along the lower diagram. .

[0003]

The conventional compass has a limitation in the length of its legs, both for stationery and drafting tools, due to the storage and carrying of the compass. There was a limit. In the present invention, in order to eliminate those drawbacks, a measure connected to a movable support (2) having a writing instrument (5) is drawn out from a fixed support (1) having a built-in automatic winding winding measure (3). It provides a compass with a measure that can draw a circle or arc whose length is the radius. In the present invention, by replacing the writing implement (5) attached to the movable support (2) with the cutter blade (6), a circular or arc-shaped part that has been drawn beforehand with a scissors or a cutter knife or the like is drawn in advance. Can be cut directly. If the measure (3) that connects the fixed support (1) and the movable support (2) is not locked, the force of the measure (3) that is going to return is effective, and it is easy to use a measure other than a circle or an arc. An arbitrary shape can be drawn or cut.

[0004]

The conventional compass is composed of two legs connected at a single point.
Depending on the length of the legs and the angle at which they opened, there was a limit to the size of the circle or arc that could be drawn. In the present invention, instead of the two legs connected at one point, it is composed of two columns that are independent from each other, and there is a feature in that the two columns are connected by a retractable spring-loaded wound measure. . That is, the length of the measure generated by separating the two columns is equivalent to the length of the radius of the circle or arc drawn as it is. In that way, depending on how long you pull out the measure,
Compared to the radius obtained with the conventional compass legs,
Alternatively, a larger radius can be set.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A. The body of a fixed support (1) having a needle (4) at the bottom serving as a starting point of a compass is made of steel,
Self-winding spring-loaded measure (3) made of polypropylene resin or other material that can be rolled and has a certain degree of hardness and that has the accuracy that can be measured.
Is incorporated as shown in FIG. (B) Connect the movable column (2) to the tip of the measure (3) built in the fixed column (1) to connect both columns in a bridge shape. C. A rolled measure (3) built into a fixed support (1)
Is provided with a function that can be automatically rewound by a spring like a steel tape measure, and can be locked by a stopper (7) like an existing tape measure. D. The length of the measure (3) pulled out from the fixed support (1) by the movable support (2) is provided with a measure starting point (8) at the exit of the fixed support (1) so that the scale can be read. . In that case, the scale attached to the measure is
Needle (4) of course at the bottom of the fixed column (1)
And the distance from the tip of the writing implement (5) at the bottom of the movable column (2). E. Attach the handle (9) when using a compass to the top of the movable column (2), and attach a writing instrument (5) such as a pencil to the bottom so that it can be attached and detached as shown in FIG. So that it can be converted to a cutter blade (6) if necessary. In this case, the cutter blade (6) may have a ball bearing interlocked with the blade as shown in FIG. 6 so that the angle of the blade easily moves in a free direction. Note that the handle (9) may be provided on the top of the fixed support (1). F. When the measure (3) which the movable support (2) pulls out from the fixed support (1) becomes longer, the middle part of the measure is not sagged so that no error occurs in the dimensions, as shown in FIG. A detachable measure support (10) is used. The connection between the support / fixed support (1) and the movable support (2) is not necessarily a measure, but may be a simple thread or band if it has a stopper function.
The present invention consists of the above configuration. When using the present invention, proceed as follows. B. For example, when drawing a circle with a radius of 30 cm,
A needle (4) at the bottom of the fixed support (1) is pierced at the position of the circular core to fix the support. B. Next, with the fixed support (1) fixed, hold the movable support (2) and pull out the measure (3) exactly 30 cm displayed on the starting point (8), and stop the stopper at that position. In step (7), the measure (3) is locked so as to be fixed. C. With the fixed support (1) fixed to the core, hold the handle (9) at the top of the movable support (3) and move it in the direction of the arrow as shown in FIG. Can be drawn. When cutting paper or cloth into a circle or an arc, replace the writing implement (5) with a cutter blade (6) as shown in FIG.
The operation may be performed in the same manner according to the above-mentioned items a, b, and c. D. To draw or cut into a waveform, star, or other arbitrary shape, release the stopper (7) of the measure (3) from the above state, and the rewind spring of the measure works effectively to move the movable support. (2) To facilitate the movement.

[0006]

According to the present invention, it is possible to easily draw or cut a large-sized circle or arc which cannot be obtained by a two-legged compass, such as a conventional stationery and a drawing tool.

[Brief description of the drawings]

FIG. 1 is a side view of the present invention when stored.

FIG. 2 is a bird's-eye view of the present invention when stored.

FIG. 3 is a side sectional view of the use state of the present invention.

FIG. 4 is a perspective view of a measure support for preventing slack of the measure of the present invention.

FIG. 5 is a perspective view of the present invention in use.

FIG. 6 is a cross-sectional view of a mounting portion of a writing instrument and a cutter at a bottom portion of a movable support according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed support 2 Movable support 3 Measure 4 Needle 5 Writing implement 6 Cutter blade 7 Stopper 8 Measure starting point 9 Handle 10 Measure support

Claims (2)

[Claims] A fixed support (1) having a wound measure (3) built therein and a writing implement (5) provided at the tip of the measure (3).
A compass with a measure, having a movable strut (2) with a. 2. A compass with a measure that can be used for both drawing and cutting by exchanging a writing implement (5) of a movable support (2) and a cutter blade (6).