CN2925917Y - Compass ruler - Google Patents

Abstract

The utility model relates to a drawing tool, namely a simple, convenient, secure and practical compass ruler, including a straight ruler. a fixing hole is set on the straight ruler, and a screw with a needle shape tail end is screwed on the fixing hole; a plurality of small holes are set on the straight ruler. The utility model is easy to operate, the structure is simple, greatly increasing the operation security.

Description

A kind of compasses chi

Technical field

The utility model relates to a kind of stationery, a kind of specifically drawing tool.

Background technology

Compasses and ruler are accounting for consequence in daily study, use these two kinds of instruments can help us better to draw circle, draw lines and measure, but be with two instruments that inconvenience is also arranged at any time, outside the tip of compasses is exposed to simultaneously, as being easy to by pricking wound because of carelessness or causing other unexpected generation.

Picture circle setting-out that how can safe ready, is what need not bother again with two instruments at any time? a kind of chi is arranged on the market, it is the circular or leg-of-mutton hollow out of making different sizes on its chi face, is equivalent to a mould, and the picture bowlder only need directly draw according to the circular hollow out on the chi and get final product.But, because hollow out makes in advance, have only fixing radius, can't draw according to the individual will and require the circle of size, so in use still there are many restrictions.

Summary of the invention

The purpose of this utility model provides a kind of with compasses and ruler is fine combines, and is simple in structure, convenient and practical, simultaneously can be according to making individual's require to draw compasses chi of the circle of specifying radius.

For reaching described purpose, compasses chi of the present utility model, comprise ruler, described ruler is provided with a fixing hole, is bolted with the screw that tail end is a tip-like on the described fixing hole, and screw is screwed onto on the ruler, do not need to take off in addition preservation, very convenient, screw can be threaded to the side plane that its tip-like tail end passes the ruler fixing hole along the hand of spiral of fixing hole, is used for the picture circle; Also can be screwed onto the side plane that its tip-like tail end is lower than the ruler fixing hole in the other direction, be used for the ruler setting-out or measure scale;

Also be provided with several apertures on the described ruler; Described aperture and fixing hole distribute in ruler scale ratio, and the control of little hole number needs the radius requirement meticulousr with reference to needing the precision of picture radius of circle to be as the criterion, and then can establish a little apertures more.The distribution mode of fixing hole and aperture also can be set on demand, and fixing hole can be located in the middle of the ruler, also can be located at both sides.For example fixing hole is located at the ruler scale 0 on, described aperture distributes to the opposite side rule along scale 0, every 0.5cm an aperture is set, the diameter of aperture can be passed ruler aperture picture with nibs such as common pencil, ball pens and is as the criterion, and is the aperture of 0.8mm as diameter.

Description of drawings

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

Fig. 2 is the sectional view of A portion among Fig. 1.

The specific embodiment

1 pair of the utility model of book is further explained explanation with reference to the accompanying drawings:

The correspondence position of 0 scale of ruler 4 is provided with fixing hole 2, is bolted with screw 1 in the fixing hole 2, and the tail end of described screw 1 is a tip-like, is initial with the fixing hole 2 of 0 scale, is provided with aperture 3 every the relevant position of 0.5cm.

When needing picture circle or drawing camber line, the afterbody that screw 1 is screwed onto screw 1 downwards exceeds the plane, bottom side of ruler, is the center of circle with the screw 1 that passes fixing hole 2, and its tip-like afterbody can better be determined centre point; Selecting the radius of needs then according to the scale on the ruler 4, with the aperture 3 of pencil or ball pen insertion ruler 4 respective radius length, is that circle is drawn in the center of circle with the screw on the fixing hole 21.

When needs use ruler 4 to draw straight line or measure scale, need not to take off screw 1, only need towards oppositely unscrewing the plane, bottom side that is lower than ruler 4 to its afterbody screw 1, can utilize ruler 4 to draw straight line or measurement scale freely, can not hinder the function of ruler 4 self because the outstanding plane, bottom side of screw 1 afterbody uses, do not need to take off in addition screw yet, increase unnecessary trouble; Simultaneously, when not using screw 1 is screwed onto below the plane, ruler 4 bottom side, prevents that its tail end tip from hurting sb.'s feelings.

The utility model is easy to use, and is simple in structure, because change not quite, can produce in batches.

The screw tip that can hide also better avoids accidents, and has increased its safe application performance greatly.

Claims (3)

1, a kind of compasses chi comprises ruler (4), it is characterized in that: described ruler (4) is provided with a fixing hole (2), is bolted with the screw that tail end is a tip-like (1) on the described fixing hole (2); Also be provided with several apertures (3) on the described ruler.

2, compasses chi as claimed in claim 1 is characterized in that: described fixing hole (2) and aperture (3) distribute in the scale ratio.

3, compasses chi as claimed in claim 2 is characterized in that: described fixing hole (2) is located on the 0 scale position of ruler (4); With fixing hole (2) is initial, and the relevant position of the every increase of distance 0.5cm scale is equipped with aperture (3).

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