CN103317909A

CN103317909A - Rope compasses

Info

Publication number: CN103317909A
Application number: CN2013101856950A
Authority: CN
Inventors: 陈宏彬; 郭南初; 张永康
Original assignee: Suzhou Vocational University
Current assignee: Suzhou Vocational University
Priority date: 2013-05-20
Filing date: 2013-05-20
Publication date: 2013-09-25

Abstract

The invention discloses rope compasses which comprise a base with a sucker, a tape box having a clamping function and a chalk sleeve capable of being lengthened through adjustment. The tape box is arranged on the base. A roller is arranged on the chalk sleeve and connected with a tape placed in the tape box and can rotate around the center of the base under the effect of the tape, and further the function of drawing circles is achieved. According to the rope compasses, the tape replaces a rigid wood plate so that the size and the weight of the compasses are reduced; the sucker replaces a compasses steel needle so that compasses controllability is increased and damage of blackboards caused by the compasses is reduced; the chalk sleeve used for placing chalks capable of being lengthened through adjustment replaces the compasses chalk sleeve with fixed diameter and fixed length, and therefore the use ratio of chalks is improved.

Description

A kind of rope compasses

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Technical field

The present invention relates to a kind of drawing tools, relate in particular to the rope compasses of a kind of suitable morning of blackboard upper drawing circle.

Background technology

In existing educational compasses, its modal shape is chevron shaped, it is fixed on the blackboard as fulcrum with a pin, another above pin fastening good chalk justify, yet, development along with realia, its blackboard has adopted Glass blackboard or metal blackboard basically, with a pin be fulcrum its in the process of drawing, slide easily, be not steady on one's legs, need carefully to draw, both hard, bother again, present a kind of compasses of announcing also are 86205223 Chinese invention patent " a kind of Compasses for blackboard " just like application number, connect the rubber sucker of a band centring means at that time with spherical everything knuckle at the centering armed lever front end of compasses, when in use, hand makes it deaeration by rubber sucker, just can be adsorbed on it on blackboard, and then realize the effect that fixed pivot is drawn; It can't determine drawn radius of a circle the Compasses for blackboard of this structure, has certain limitation.Application number is 200720070855.7 Chinese invention patent " a kind of magnet board compasses " in addition, the parts of its fulcrum that is used for fixing are set to magnet, also comprise pen and holding screw, the slide bar of activity chain tape splicing slide block above magnet, the periphery tightens connection suitable dial with it, be equipped with slide block on slide bar, the centre has the upper and lower elongated slot that communicates, and the elongated slot top is equipped with the graduation mark that the band numeral is put.Though the compasses of this structure have solved the effect of originally finding out the size of drawn circle from compasses on one's body, fixedly the only limiting to of its fulcrum used at the blackboard of magnetic, and what it adopted simultaneously is rigid track, and weight is bigger, can't fold, and is easy to carry.

Summary of the invention

Technical problem at above-mentioned existence the objective of the invention is: having proposed with the sucker is the center of circle, is the rope compasses that can survey drawn radius of circle with flexible tape measure.

Technical solution of the present invention is achieved in that a kind of rope compasses, comprises base, the flexible rule box with stuck function that sucker is housed, the chalk sleeve that can regulate prolongation; Described flexible rule box is installed on the base; Described chalk sleeve is provided with roller, and the tape measure in described roller and the flexible rule box is connected, and can be around the rotation of base center under the effect of tape measure, and then the function that has realized drawing circle.

Preferably, described flexible rule box comprises housing, scroll spring, chi dish and stuck device; One side of described scroll spring is fixed on the centered cylinder of housing, and opposite side is arranged in the groove of chi dish; Described tape measure is arranged on the chi dish, and can rotate to tighten scroll spring by driving the chi dish; Described stuck device is arranged in the rail groove of housing, and is connected with housing with first spring.

Preferably, described base comprises chassis, cylinder, sucker; Described sucker is arranged on the lower surface on chassis; Described cylinder is arranged on the top on chassis; Have groove on the described cylinder, and cooperate with Spring Card, flexible rule box is fixed on the base.

Preferably, described chalk sleeve contains the first stroke shell, second shell, cover core, second spring, and described the first stroke shell and second shell are by being threaded; Described roller is arranged between the first stroke shell and second shell rotationally; Described cover core is arranged on the inside of the first stroke shell and second shell, and its rear portion back-up ring is butted on the rear portion back-up ring of second shell; Described second spring is fixed on the front portion of cover core, and an end of described second spring is against the anterior back-up ring of the first stroke shell, and the other end is butted on the middle part back-up ring of cover core.

Because the utilization of technique scheme, the present invention compared with prior art has following advantage:

The described rope compasses of the present invention program replace the rigidity plank with tape measure, thereby reduce the volume and weight of compasses; Replace the compasses draw point with sucker, thereby increase the controllability of compasses and reduce compasses to the damage of blackboard; And be arranged to regulate the compasses chalk sleeve that the chalk sleeve that prolongs chalk replaces the fixed diameter regular length in order to the chalk sleeve that chalk is installed, thereby improve the utilization rate of chalk.

Description of drawings

Below in conjunction with accompanying drawing technical solution of the present invention is described further:

Accompanying drawing 1 is the structural representation of rope compasses of the present invention;

Accompanying drawing 2 is the exploded view of flexible rule box in the rope compasses of the present invention;

Accompanying drawing 3 is the exploded view on chassis in the flexible compasses of the present invention;

Accompanying drawing 4 is the exploded view of chalk sleeve in the flexible compasses of the present invention;

Wherein: 1, base; 2, flexible rule box; 3, chalk sleeve; 4, sucker; 5, roller; 6, tape measure; 7, housing; 8, scroll spring; 9, chi dish; 10, stuck device; 11, centered cylinder; 12, rail groove; 13, first spring; 14, chassis; 15, cylinder; 16, groove; 17, Spring Card; 18, the first stroke shell; 19, second shell; 20, cover core; 21, second spring; 22, rear portion back-up ring; 23, middle part back-up ring.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is described.

Accompanying drawing 1-4 is a kind of rope compasses of the present invention, comprises the base 1 that sucker 4 is housed, the flexible rule box 2 with stuck function and the chalk sleeve 3 that can regulate prolongation, and described flexible rule box 2 is installed on the base 1; Described chalk sleeve 3 is provided with roller 5, and the tape measure 6 in described roller 5 and the flexible rule box 2 is connected, and can be around the rotation of base 1 center under the effect of tape measure 6, and then the function that has realized drawing circle.

Wherein said flexible rule box 2 comprises housing 7, scroll spring 8, chi dish 9 and stuck device 10; One side of described scroll spring 8 is fixed on the centered cylinder 11 of housing 7, and opposite side is arranged in the groove of chi dish 9; Described tape measure 6 is arranged on the chi dish 9, and can tighten scroll spring 8 by driving 9 rotations of chi dish; Described stuck device 10 is arranged in the rail groove 12 of housing 7, and is connected with housing 7 with first spring 13.

Described base 1 comprises chassis 14, cylinder 15, sucker 45; Described suction 4 is arranged on the lower surface on chassis 14; Described cylinder 15 is arranged on the top on chassis 14; Have groove 16 on the described cylinder 15, and cooperate with Spring Card 17, flexible rule box 2 is fixed on the base 1.

Described chalk sleeve 3 contains the first stroke shell 18, second shell 19, cover core 20, second spring 21, and described the first stroke shell 18 and second shell 19 are by being threaded; Described roller 5 is arranged between the first stroke shell 18 and second shell 19 rotationally; Described cover core 20 is arranged on the inside of the first stroke shell 18 and second shell 19, and its rear portion back-up ring 22 is butted on the rear portion back-up ring (not shown) of second shell 19; Described second spring 21 is fixed on the front portion of cover core 20, and an end of described second spring 21 is against the anterior back-up ring (not shown) of the first stroke shell 18, and the other end is butted on the middle part back-up ring 23 of cover core 20.

Rope compasses of the present invention are in the process of using, and the first step is fixed on base 1 on the blackboard by sucker; Stir stuck device 10 then, make it unclamp tape measure 6, extract tape measure 6 out to Len req, unclamp stuck device 10 again, stuck device 10 is under the effect of first spring 13, what the one side entered flexible rule box 2 goes out the chi mouth, tape measure 6 just is stuck, second step was fixed in blackboard with compasses by sucker 4, draw circle around flexible rule box 2 centers by the chalk that the other end is embedded in the chalk sleeve 3, this moment, tape measure 6 one ends rotated around base 1 center, and the other end so just can guarantee the accuracy of drawn circle around the rotation of chalk sleeve 3 centers.The chalk sleeve that wherein can regulate prolongation be by second spring 21 with the cover core, 18 mating reactions of the first stroke shell realize, and then can prolong the length that chalk stretches out chalk sleeve 3 as required.

Rope compasses of the present invention replace the rigidity plank with tape measure 6, thereby reduce the volume and weight of compasses; Replace the compasses draw point with sucker 4, thereby increase the controllability of compasses and reduce compasses to the damage of blackboard; And be arranged to regulate the chalk sleeve 3 that prolongs chalk in order to the chalk sleeve 3 that chalk is installed and replace the compasses chalk sleeve of fixed diameter regular lengths, thereby improve the utilization rate of chalk.

Above-described embodiment only is explanation technical conceive of the present invention and characteristics; its purpose is to allow the personage that is familiar with this technology can understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; all equivalences that spirit essence is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.

Claims

1. rope compasses is characterized in that: comprise base, the flexible rule box with stuck function that sucker is housed, the chalk sleeve that can regulate prolongation; Described flexible rule box is installed on the base; Described chalk sleeve is provided with roller, and the tape measure in described roller and the flexible rule box is connected, and can be around the rotation of base center under the effect of tape measure, and then the function that has realized drawing circle.

2. rope compasses according to claim 1, it is characterized in that: described flexible rule box comprises housing, scroll spring, chi dish and stuck device; One side of described scroll spring is fixed on the centered cylinder of housing, and opposite side is arranged in the groove of chi dish; Described tape measure is arranged on the chi dish, and can rotate to tighten scroll spring by driving the chi dish; Described stuck device is arranged in the rail groove of housing, and is connected with housing with first spring.

3. rope compasses according to claim 1, it is characterized in that: described base comprises chassis, cylinder, sucker; Described sucker is arranged on the lower surface on chassis; Described cylinder is arranged on the top on chassis; Have groove on the described cylinder, and cooperate with Spring Card, flexible rule box is fixed on the base.

4. rope compasses according to claim 1 is characterized in that: described chalk sleeve contains the first stroke shell, second shell, cover core, second spring, and described the first stroke shell and second shell are by being threaded; Described roller is arranged between the first stroke shell and second shell rotationally; Described cover core is arranged on the inside of the first stroke shell and second shell, and its rear portion back-up ring is butted on the rear portion back-up ring of second shell; Described second spring is fixed on the front portion of cover core, and an end of described second spring is against the anterior back-up ring of the first stroke shell, and the other end is butted on the middle part back-up ring of cover core.