CN2725035Y

CN2725035Y - Pencil compass

Info

Publication number: CN2725035Y
Application number: CN 200420064539
Authority: CN
Inventors: 赵普宇; 葛增华
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-05-31
Filing date: 2004-05-31
Publication date: 2005-09-14
Anticipated expiration: 2014-05-31

Abstract

The utility model relates to a compass, belonging to the technical field of compasses groups according to the International Patent Classification (IPC). The aim is to solve the technical problems that the needle feet of the former educational beam compasses are not easy to be fixed; the sizes are inaccurate and the use is inconvenient. The compass mainly comprises a chalk cover, a movable ring, a chalk, an arm beam, a rotary ring, a fixed axis, a sucker, a pilot pin and a ruler. The utility mode is characterized in that: the inner wall of the movable ring is sheathed at the outer wall of the chalk cover; the upper root of the pilot pin is welded behind the upper part of the movable ring; the whole pilot pin is hung on the upper prism of the arm beam; the whole ruler is directly engraved at the opposite side of the arm beam. So the compass has the advantages of wide application and easy popularization.

Description

A kind of compasses

(1) technical field:

The utility model relates to a kind of compasses, divides the technical field that belongs to compasses group by International Patent Classification (IPC) (IPC).

(2) background technology:

At present, the technology about compasses group existing and that once had was all done very fruitful effort to a kind of demand of compasses, also once designed many outstanding technical schemes.As declaring of the Decree of Patent Office of China in 1996 by Liang Wei, Granted publication number is CN2227030Y, China Patent No. (ZL) is: No. 95210401.6 utility model patent title is the utility model patent of " Convenient compasses ", the technical scheme that is adopted, technical elements in compasses group is a routine of great value invention, it has solved simple and reasonable, easy to use technical problem effectively.But still have some deficits, the educational compasses stitch was difficult for fixing before it also was difficult to solve, and the size inaccuracy is used inconvenient technical problem.

(3) summary of the invention

The purpose of this utility model is to provide a kind of compasses.Be difficult for fixing with educational compasses stitch before solving, the size inaccuracy is used inconvenient technical problem.

The new technical scheme that above-mentioned technical problem to be solved in the utility model adopted is: a kind of compasses of the present utility model mainly are made of chalk sleeve, shift(ing) ring, snap ring, chalk, arm beam, swivel becket, fixed axis, sucker, pilot pin, lattice chi.

In shape, structure and combination thereof, the total essential features of a kind of compasses of the present utility model and immediate prior art is: the middle upper end of chalk sleeve is fixedly mounted on the beam body of arm beam, the inner wall sleeve of snap ring is connected on the lower end of chalk sleeve, the integral body edge of chalk is enclosed within the inside, lower end of chalk sleeve, be combined into the combining structure of cylindrical shape, function has been that fixedly chalk is regulated the effect of size.The inner wall sleeve of swivel becket is connected on the outer wall of fixed axis, and the lower end of fixed axis is bonded in the upper end of sucker, is combined into the bascule of cylindrical shape, and function has been the fixedly center of circle and the round effect of picture.In shape, structure and combination thereof, a kind of compasses of the present utility model technical characterictic different with immediate prior art is: the inner wall sleeve of shift(ing) ring is connected on the outer wall of chalk sleeve, the upper end root weld of pilot pin is in the behind, upper end of shift(ing) ring, be combined into the integrative-structure of cap for brush shape, function has been to drive the moving pin of compasses to regulate the effect of size.The integral body of pilot pin hangs over the upper end rib body of arm beam, and the whole directly stamp of lattice chi is combined into the bascule of lattice chi shape at the back side of arm beam, and function has been convenient and the accurately effect of sizing.The educational compasses stitch is difficult for fixing before so just having reached a kind of compasses solution of the present utility model, size inaccuracy, the purpose of the technical problem of use inconvenience.

The beneficial effect of a kind of compasses of utility model is: the utility model is difficult for fixing for educational compasses stitch before solving, the size inaccuracy, use the inconvenient technical scheme that technical problem adopted to compare two place's advantage and improvement with the technology that once had about compasses group with existing:

First, because the inner wall sleeve that has designed shift(ing) ring in the technical scheme of a kind of compasses of the present utility model is connected on the outer wall of chalk sleeve, the upper end root weld of pilot pin is in the behind, upper end of shift(ing) ring, be combined into the integrative-structure of cap for brush shape, so easier solution drives the technical problem that the moving pin of compasses is regulated size.

Second, because the integral body that has designed pilot pin in the technical scheme of a kind of compasses of the present utility model hangs over the upper end rib body of arm beam, the whole directly stamp of lattice chi is combined into the bascule of lattice chi shape at the back side of arm beam, so the technical problem of the convenient and accurate sizing of easier solution.

(4) description of drawings:

Accompanying drawing provides the structural representation of a kind of compasses of the present utility model:

Fig. 1: the overall structure schematic diagram that is a kind of compasses of the present utility model;

Fig. 2: the partial structurtes schematic diagram that is a kind of compasses of the present utility model;

The label declaration at each position in the schematic diagram:

1 chalk sleeve, 2 shift(ing) rings, 3 snap rings, 4 chalks, 5 arm beams

6 swivel beckets, 7 fixed axis, 8 suckers, 9 pilot pins, 10 lattice chis

(5) specific embodiment:

Below in conjunction with accompanying drawing, the educational compasses stitch was difficult fixing in the past for realization solves to a kind of compasses of the present utility model, the size inaccuracy, and the optimal way of the technical scheme that the inconvenient technical problem of use is taked is described further:

Its static structure: see also accompanying drawing: as shown in the figure, a kind of compasses of the present utility model mainly are made of chalk sleeve 1, shift(ing) ring 2, snap ring 3, chalk 4, arm beam 5, swivel becket 6, fixed axis 7, sucker 8, pilot pin 9, lattice chi 10.Its major part chalk sleeve 1, chalk 4, arm beam 5, fixed axis 7, sucker 8, lattice chi 10 are selected for use by market.Its shift(ing) ring 2 is ring-like shapes, is material with the light metal, through the casting processing and manufacturing.Its snap ring 3 is thin ring-like shapes, is material with rubber, through the chemistry forming processing and manufacturing.Its swivel becket 6 is toroidals, is material with the light metal, through the casting processing and manufacturing.Its pilot pin 9 is fine needle shapes, is material with the light metal, through the casting processing and manufacturing.

In shape, structure and combination thereof, the total essential features of a kind of compasses of the present utility model and immediate prior art is: the middle upper end of chalk sleeve 1 is fixedly mounted on the beam body of arm beam 5, the inner wall sleeve of snap ring 3 is connected on the lower end of chalk sleeve 1, the integral body edge of chalk 4 is enclosed within the inside, lower end of chalk sleeve 1, be combined into the combining structure of cylindrical shape, function has been that fixedly chalk is regulated the effect of size.The inner wall sleeve of swivel becket 6 is connected on the outer wall of fixed axis 7, and the lower end of fixed axis 7 is bonded in the upper end of sucker 8, is combined into the bascule of cylindrical shape, and function has been the fixedly center of circle and the round effect of picture.In shape, structure and combination thereof, a kind of compasses of the present utility model technical characterictic different with immediate prior art is: the inner wall sleeve of shift(ing) ring 2 is connected on the outer wall of chalk sleeve 1, the upper end root weld of pilot pin 9 is in the behind, upper end of shift(ing) ring 2, be combined into the integrative-structure of cap for brush shape, function has been to drive the moving pin of compasses to regulate the effect of size.The integral body of pilot pin 9 hangs over the upper end rib body of arm beam 5, and the whole directly stamp of lattice chi 10 is combined into the bascule of lattice chi shape at the back side of arm beam 5, and function has been convenient and the accurately effect of sizing.

Below by using method, further set forth the dynamic structure relation of a kind of compasses of the present utility model: in use, when the needs fixedly center of circle time, according to theory of mechanics, at first sucker 8 is put in assigned address, compresses sucker 8 then, discharge inner air, sucker 8 is adsorbed on the blackboard then again, thereby finishes the fixedly task in the center of circle.

In use, when needs limited radius, according to theory of mechanics, at first mobile shift(ing) ring 2 allowed pilot pin 9 refer to accurate required size then, draws circle more then, thereby finishes the radius of a circle task accurately that makes.The educational compasses stitch is difficult for fixing so just to have realized solving in the past by a kind of compasses of the present utility model, size inaccuracy, the technical scheme of the technical problem that use is inconvenient.

Realize that preferred plan of the present utility model is is material with metal, rubber, utilize the basic equipment of stationery factory, take to produce by batch in a large number,, so just can realize the practical value and the economic worth of a kind of compasses of the present utility model better with the demand of supply educational circles.

Claims

1. compasses, it is by chalk sleeve (1), shift(ing) ring (2), snap ring (3), chalk (4), arm beam (5), swivel becket (6), fixed axis (7), sucker (8), pilot pin (9), lattice chi (10) constitutes, the middle upper end of its chalk sleeve (1) is fixedly mounted on the beam body of arm beam (5), the inner wall sleeve of snap ring (3) is connected on the lower end of chalk sleeve (1), the integral body edge of chalk (4) is enclosed within the inside, lower end of chalk sleeve (1), the inner wall sleeve of swivel becket (6) is connected on the outer wall of fixed axis (7), the lower end of fixed axis (7) is bonded in the upper end of sucker (8), it is characterized in that: the inner wall sleeve of shift(ing) ring (2) is connected on the outer wall of chalk sleeve (1), the upper end root weld of pilot pin (9) is in the behind, upper end of shift(ing) ring (2), the integral body of pilot pin (9) hangs over the upper end rib body of arm beam (5), and the whole directly stamp of lattice chi (10) is at the back side of arm beam (5).