JP2003130602A - Concentric circle drawing tool combined with tape measure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which can draw a circle with a tape measure instead of using compasses, thread, a string, a rod, etc. SOLUTION: A drawing tool combined with a tape measure which is like a conventional tape measure equipped with a sucker which has a main index line for fixing exactly the central point of a body to that of a circle. The body is fixed by a presser foot at the upper part of the body which makes a sucker adsorb so that a tape measure may be pulled out. The tape measure which digital range finder that carries out display of the distance from a center, fixes a tape measure by a stopper in an exact distance obtained by itself, and can draw an exact circle with a drawing tool inserted in a hole at the tip of itself. The hole at the tip of the tape measure is devised so that a drawing tool may be attached to not only from the upper part but also from the lower part in order to draw a bold line. A circular sucker which is broader than the body is usually removed and attached to a horizontal side in order to make carrying the tape measure easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a window for digitally displaying the distance from the center in addition to the scale of a tape measure, stopping the tape measure at a required distance, and inserting a drawing tool into the hole at the tip of the tape. A concentric circle drawing tool designed for the purpose of drawing an accurate circle on the floor, wall surface, etc. When the circle drawing work is not done, remove the suction cup part and put it on the side, use it as a normal tape measure that does not interfere with carrying It is a combined device.

[0002]

2. Description of the Related Art A small circle is a compass, and a large circle is a thread, a string, or a rod-shaped object with a drawing tool attached to the tip, and a needle, a nail,
I drew it with a stake.

[0003]

The conventional tape measure is an instrument for measuring a distance, and the scale is visible.
Even if the drawing tool is attached to the tip with the main body in the center and a circle is drawn, an accurate circle cannot be drawn, so it cannot be expected to be used as a circle drawing tool. In addition, the method using threads, strings, and sticks is troublesome to set, and at the same time, a hole such as a needle hole is formed in the center. In order to solve these problems, the challenge was to create a tape measure and a circular drawing.

[0004]

SOLUTION: To take the center point of a circle without forming a hole such as a needle, a suction cup having a center indicating line is attached to the center of the lower part of the tape measure main body so as to align with the mark X of the paper. If you press the upper retainer connected to the suction cup, the air inside the suction cup will escape from the upper hole of the retainer, and if you rotate 90 degrees, the air hole will close and the body will be fixed. Install a window where the distance is displayed digitally by pulling out the tape measure, press the stopper at the required distance to stop it, and draw a circle with the drawing tool attached to the tip of the tape measure by the mechanism that the main body rotates freely around the neck part of the suction cup I devised a method called.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. The suction cup 7 of FIG. 1 is provided with a center indicator line 6 as shown in FIGS. 2 and 3, and the main body 1 is pushed by the upper presser 5 according to the center line segment x mark attached to the paper or other material. Remove the air from the suction cup to adsorb it and press down the
After turning the body 0 degrees to fix the main body, pull out the tape measure, and when the number on the digital display 4 indicates the required distance, stop with the stopper 3 and insert a drawing tool into the hole at the tip of the tape measure to draw a circle. If the drawing is a rough material that does not work with a suction cup, place a transparent drawing board 9 with a suction cup under the suction cup.

By pressing down the presser 5 on the upper part of the main body, the air in the suction cup is pushed out from the hole in the upper part, when the presser is rotated 90 degrees, the airtightness is fixed, and when it is returned, the air is injected and the suction cup is separated. The adsorption / desorption was simplified.

The suction cup 7 is attached to / detached from the main body through the suction cup receiving hole 11 of FIG. 5, and is adhered to the lateral surface of the main body as shown in FIG.

According to the bold tool holder of claim 2, when it is desired to draw a circle in bold as shown in FIG. 6, a drawing tool holder 13 with an adjuster is used to insert a pin at the top of the holder into the tape measure tip hole from below. To do.

[0009]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, the body can be fixed to the center of the circle by the suction cup with the center indication line and the pressing member, and it is not necessary to support the body by hand.

With the digital display, the correct distance from the center can be read and the correct circle can be drawn easily.

By removing the suction cup and attaching it to the side surface, the carrying is almost the same as the conventional tape measure.

With the drawing tool holder of claim 2, lines of various thicknesses can be selected.

[Brief description of drawings]

FIG. 1 is a view showing a left side surface of a main body, showing a state in which a tape measure is pulled out and stopped, a drawing tool is attached to a tip hole, and a suction cup is sucked.

FIG. 2 is a view of the main body of FIG. 1 seen from above.

FIG. 3 is a view of the main body of FIG. 1 seen from below.

FIG. 4 is a diagram showing a form of the opposite side of the main body of FIG. 1 when being carried.

5 is a view of the main body of FIG. 4 as seen from below.

FIG. 6 is a diagram showing a state where an attempt is made to draw using a drawing tool holder with an adjuster for drawing a circle with a thick line.

[Explanation of symbols]

1 body 2 tape measure 3 stopper 4 digital rangefinder 5 hold down 6 center indicator line 7 sucker 8 Drawing tools 9 Drawing stand 10 sheets 11 Sucker receiving hole 12 handles 13 Drawing tool holder with adjuster 14 Bold drawing tools

Claims (2)

[Claims] 1. A digital range finder for displaying the distance from the center to the tip is installed on the side surface of the tape measure main body, a suction cup with a removable center indication line is provided on the lower surface, and a presser for connecting with the suction cup is attached to the upper part of the tape measure. Concentric drawing tool that also has a tape measure and has a drawing tool insertion hole at the tip. 2. A thick line drawing tool holder with an adjuster for drawing a thick line by inserting a pin from the bottom into a hole at the tip of a tape measure.