CN201009592Y

CN201009592Y - Convenient compasses

Info

Publication number: CN201009592Y
Application number: CNU2006200496436U
Authority: CN
Inventors: 赵泰钧
Original assignee: Shanghai Jiading Nanxiang Primary School
Current assignee: Shanghai Jiading Nanxiang Primary School
Priority date: 2006-12-27
Filing date: 2006-12-27
Publication date: 2008-01-23
Anticipated expiration: 2016-12-27

Abstract

The aim of the utility model is to disclose a convenient compass, which has a function of scale and is capable of drawing accurately a circle with a defined value, and is very convenient and simple to operate; an iron core is arranged in a locating rod of the compass, the bottom of the iron core is fixed at the bottom of the middle of the locating rod, the top of the iron core protrudes out of the upper end of the locating rod, and the top end of the iron core is provided with a screw thread, and is covered with a stop nut; a slotted hole is arranged at the side of the lower part of the locating rod, the lower end of the iron core is covered with a sheetmetal flexible ruler through a reset torsional spring, and the front end of the sheetmetal flexible ruler is blocked at the outside of the slotted hole by a block; the position of the locating rod is defined by the stop nut of the top of the iron core in the locating rod, so that the compass is not easy to slip; by using the sheetmetal flexible ruler covered on the locating rod, the length of the radius of the circle to be drawn is got directly when drawing a circle.

Description

Convenient compasses

Technical field

The utility model relates to a kind of compasses, particularly a kind of Convenient compasses with scale.

Background technology

Compasses are a kind of drawing tools that are used for the picture circle commonly used, though it is very convenient in use, it does not have scale, can't determine radius of a circle before drawing circle; When needing picture to determine the bowlder of radius, just must on rule, measure earlier the radius length that needs, draw circle again; Such process is the complexity of ten minutes obviously, and the user is caused a lot of inconvenience; And draw the easy slippage of bowlder backstay.

The utility model content

The purpose of this utility model provides a kind of Convenient compasses, has the function of scale, can draw exactly and determine the circle of numerical value, and is very convenient, simple to operate.

The purpose of this utility model can be achieved through the following technical solutions:

A kind of Convenient compasses is characterized in that: be provided with iron core in the backstay of compasses, described iron core bottom is fixed on the bottom in the middle of the backstay, and the backstay upper end is stretched out on the top of iron core, and described iron core top is provided with screw thread, is set with stop nut; Be provided with slotted eye on the backstay lower side, the lower end of iron core is set with the sheetmetal tape by reduction torsion spring, and the front end of sheetmetal tape is stuck in outside the slotted eye by fixture block.

Convenient compasses of the present utility model limits the position of backstay by the stop nut on iron core top in the middle of the backstay, makes compasses be difficult for slippage; Be sleeved on the sheetmetal tape on the backstay, when drawing circle, just can directly know and speak radius of a circle length, simple to operate, convenient.

Description of drawings

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structure principle chart of the multiple function rubber of the utility model.

The specific embodiment

As shown in Figure 1, a kind of Convenient compasses, in the backstay 1 of compasses, be provided with iron core 2, described iron core 2 bottoms are fixed on the bottom in the middle of the backstay 1, backstay 1 upper end is stretched out on the top of iron core 2, and described iron core 2 tops are provided with screw thread, are set with stop nut 3, can limit the position of backstay by stop nut 3, draw bowlder can slippage; On backstay 1 lower side, be provided with slotted eye 11, the lower end of iron core 2 is set with sheetmetal tape 4 by the reduction torsion spring (not shown), the front end of sheetmetal tape 4 is stuck in outside the slotted eye 11 by fixture block, sheetmetal tape 4 can stretch from slotted eye 11, be suspended on the picture bar 5 by fixture block, just can just move your required radius length to by tape 4 high scales.Finish using, decontrol sheetmetal tape 4, sheetmetal tape 4 just can be realized having resetted by reduction torsion spring.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. Convenient compasses is characterized in that: be provided with iron core in the backstay of compasses, described iron core bottom is fixed on the bottom in the middle of the backstay, and the backstay upper end is stretched out on the top of iron core, and described iron core top is provided with screw thread, is set with stop nut; Be provided with slotted eye on the backstay lower side, the lower end of iron core is set with the sheetmetal tape by reduction torsion spring, and the front end of sheetmetal tape is stuck in outside the slotted eye by fixture block.