CN2053576U

CN2053576U - Agile compasses

Info

Publication number: CN2053576U
Application number: CN 89202133
Authority: CN
Inventors: 刘国安
Original assignee: LIU GUO AN
Current assignee: LIU GUO AN
Priority date: 1989-02-23
Filing date: 1989-02-23
Publication date: 1990-02-28

Abstract

The utility model discloses an agile compasses which belongs to a drawing instrument. The utility model is an improved agile compasses, combining the merits and demerits of the original between the old type long leg agile compasses and the old type short leg agile compasses, aiming at the inconvenient drawing by holding any pen of the old type agile compasses. The technical characteristic is that the needle leg of the agile compasses is shaped in a tube, and the needle leg sheathed in the tube can extend, shrink, and fix. The pen leg end of the agile compasses fixes to a pen holder cylinder by screw bolt mode. The pen holder cylinder can freely adjust the intersecting angle between a pen holder and the pen leg. The utility model can reliably and simply hold any pen and can draw by ascertaining the collapsing length of the pen.

Description

Agile compasses

The utility model belongs to drawing instrument.

Now the old-fashioned compasses of Shi Yonging have four shortcomings: one, two leg lengths of compasses are fixed, and with the compasses of the short-leg long leg compasses circle of (long radius) that can draw that just can not draw, when not using, the long leg compasses are long, and volume is big, does not have the short-leg compasses to collect well.Two, two legs of the old compasses fixing part of stitch and pencil-lead respectively, structure is complicated, and is fixing also not really firm.Three, old-fashioned compasses need use the lead bullion pen core, if during no pencil stub, good pencil be cut open and be got core, and this is kind of a waste, and particularly later the product of rod lead bullion core will day by day reduce because of the promoting the use of of propelling pencil, and old friend's formula compasses will face " running out of grain ".Four, old-fashioned compasses are except that directly clamping lead bullion pen core is used, and some can help other pen use by the clamping action of " compasses folder ", and some then can not use by the help of compasses folder.

The utility model is the shortcoming that overcomes old-fashioned compasses, and the spy provides a kind of novel bow compass nimble, reliable, that make well.

The purpose of this utility model realizes like this: one, the pin leg with old-fashioned compasses changes pipe into, is inserted with always the stitch of footpath 2.5-3 millimeter, long 6-8 centimetre in the pipe, and stitch is fixed by the nut of the mouth of pipe.Stitch end tip portion is an eccentric cone, 6 °-9 ° of cone angles.Two, a leg end of old compasses is left a screw rod eye, with plate shape elasticity folder tube diameter 2-2.5 millimeter screw rod, nut is fixed on the screw rod eye and gets final product again.

When using this new compasses, (plate shape elastic pen clips tube is that the shape that changes of " plate shape Flexible clamp " is sold in market in use can directly to insert propelling pencil (or other any pen) in the pen clip tube, an available plate shape elastomeric material is made, its front end has kept the shape of common spring filate clip basically, but it is simpler than the clip of common spring wire, shape easily and clamping force big).Can be in the use according to the size of making circle, freely select between a penholder and the leg angle, reach the extension elongation of penholder, pin leg, just can justify.

But the extension elongation of the utility model free adjustment stitch and penholder, so overcome the long changeless shortcoming of old-fashioned compasses two legs.The circle of the long radius of both can having drawn can separate pen and rule again when not using, and pen is made a usefulness, and rule are done the rule Tibetan, but and because of stitch retraction stitch pipe inner volume diminishes, this is particularly advantageous in collection.The utility model uses (pen, drawing pen also can be backed out penholder, the metal bile duct is inserted in the folder tube use) because of the different penholders of any diameter being inserted in the folder tube.Can freely select the angle of cut between a penholder and the leg, again can the free adjustment penholder, the collapsing length of stitch, so this seems nimble especially.So overcome old-fashioned compasses such as using the lead bullion pen core, can not use propelling pencil; Lead bullion pen core usefulness can only be directly pressed from both sides, other any mapping can not be directly pressed from both sides; And when using the lead bullion core, also will cut open bar and get core, with the levigate shortcoming of using and so on of lead bullion core.In addition, new compasses lack than the part of old compasses and part thicker, so its mechanical strength raising is not fragile; Processing and manufacturing is easy; Clamping to pen is also solid and reliable.

Concrete structure of the present utility model is provided by accompanying drawing.

The accompanying drawing device comprise a compasses main body frame (1), a separable compasses pin leg (2) and a leg (3) are housed on the frame (1), pin leg (2) is a tubulose, and stitch (4) is arranged in the pipe, stitch (4) is fixing by degree of tightness nut (5).Leg lower end has a screw rod eye (6), pen clip tube (7) to be fixed on the screw rod eye (6) by screw rod (8) and nut (9), has gripped propelling pencil (10) in the pen clip tube (7).

Embodiment of the present utility model is because of too simple, and narration is omitted.

Claims

1, be used to draw and make the device of circle, this device is made up of a pin leg (2) and a leg (3), it is characterized in that being equipped with in the pin leg (2) scalable fixing stitch (4), a leg (3) but end the pen clip tube (7) of any diameter penholder of clamping is housed.

2, according to the described device of claim 1, it is characterized in that pin leg (2) is a tubulose, it is scalable that stitch (4) is housed in the pipe, and the mouth of pipe is equipped with regulates hold-down nut (5).

3, according to the described device of claim 1, it is characterized in that the end of a leg (3) is equipped with pen clip tube (7) through a bolt mechanism, be adjustable movable the connection between pen clip tube and the bolt mechanism.