CN203472352U

CN203472352U - Rope compasses

Info

Publication number: CN203472352U
Application number: CN201320273984.1U
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: 2014-03-12
Anticipated expiration: 2023-05-20

Abstract

The utility model relates to 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

Technical field

The utility model relates to a kind of drawing tools, relates in particular to a kind of rope compasses that are useful in blackboard upper drawing circle.

Background technology

In existing educational compasses, its modal shape is chevron shaped, it is fixed on 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 metallic blackboard substantially, with a pin, it is its easily slip in the process of drawing of fulcrum, be not steady on one's legs, need to carefully draw, both hard, bother again, Chinese utility model patent < < Compasses for blackboard > > that a kind of compasses of announcing are at present also 86205223 just like application number, centering armed lever front end at compasses connects a rubber sucker with centring means with spherical everything knuckle at that time, when in use, hand makes it deaeration by rubber sucker, just it can be adsorbed on blackboard, and then realize the effect that fixed pivot is drawn, it cannot determine drawn radius of a circle the Compasses for blackboard of this structure, has certain limitation.Also has Chinese utility model patent < < magnetic blackboard compasses > > that application number is 200720070855.7, 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, periphery tightens connection suitable dial with it, on slide bar, be equipped with slide block, centre has the upper and lower elongated slot communicating, and elongated slot top is equipped with the graduation mark that band numeral is put.Although the compasses of this structure have solved from compasses, originally find out the effect of the size of drawn circle with it, fixedly the only limiting to of its fulcrum used on the blackboard of magnetic, and what it adopted simultaneously is rigid track, and weight is larger, cannot fold, and is easy to carry.

Utility model content

The utility model object is in order to overcome the deficiencies in the prior art, to provide a kind of to take sucker as the center of circle, take flexible tape measure as surveying the rope compasses of drawn radius of circle.

For achieving the above object, the technical solution adopted in the utility model is: a kind of rope compasses, comprise filling suctorial base, thering is the flexible rule box of stuck function and the chalk sleeve of adjustable prolongation, and described flexible rule box is installed on base; On described chalk sleeve, be provided with roller, and described roller is connected with the tape measure in flexible rule box, and can be around base central rotation under the effect of tape measure, and then realized the function of drawing circle.

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

Preferably, described chalk sleeve contains the first stroke shell, second shell, cover core, the second spring, and described the first stroke shell and second shell are threaded connection; 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 the second spring is fixed on the front portion of cover core, and one end of described the 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.

Due to the utilization of technique scheme, the utility model compared with prior art has following advantages:

Rope compasses described in the utility model replace rigidity plank with tape measure, thereby reduce the volume and weight of compasses; With sucker, replace compasses draw point, thereby increase the controllability of compasses and reduce the damage of compasses to blackboard; And the compasses chalk sleeve of being arranged to the chalk sleeve replacement fixed diameter regular length of adjustable prolongation chalk in order to the chalk sleeve of chalk to be installed, thereby the utilization rate of raising chalk.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, technical solutions of the utility model are described further:

Accompanying drawing 1 is the structural representation of rope compasses described in the utility model;

Accompanying drawing 2 is the exploded view of flexible rule box in rope compasses described in the utility model;

Accompanying drawing 3 is the exploded view on chassis in rope compasses described in the utility model;

Accompanying drawing 4 is the exploded view of chalk sleeve in rope compasses described in the utility model;

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, the first spring; 14, chassis; 15, cylinder; 16, groove; 17, Spring Card; 18, the first stroke shell; 19, second shell; 20, cover core; 21, the second spring; 22, rear portion back-up ring; 23, middle part back-up ring.

the specific embodiment

Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.

Accompanying drawing 1-4 is a kind of rope compasses described in the utility model, comprise be equipped with sucker 4 base 1, have stuck function flexible rule box 2 and and the chalk sleeve 3 of adjustable prolongation, described flexible rule box 2 is installed on base 1; On described chalk sleeve 3, be provided with roller 5, and described roller 5 is connected with the tape measure 6 in flexible rule box 2, and can be around base 1 central rotation under the effect of tape measure 6, and then realized the function of 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 in 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 chi dish 9, and can tighten scroll spring 8 by driving chi dish 9 to rotate; Described stuck device 10 is arranged in the rail groove 12 of housing 7, and is connected with housing 7 with the first spring 13.

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

Described chalk sleeve 3 contains the first stroke shell 18, second shell 19, cover core 20, the second spring 21, and described the first stroke shell 18 and second shell 19 are threaded connection; 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 the second spring 21 is fixed on the front portion of cover core 20, and one end of described the 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 described in the utility model are in the process of using, the first step is stirred stuck device 10, make it unclamp tape measure 6, extract tape measure 6 out to Len req, unclamp again stuck device 10, stuck device 10 is under the effect of the first spring 13, what one side entered flexible rule box 2 goes out chi mouth, tape measure 6 is just stuck, second step is fixed on blackboard by compasses by sucker 4, the chalk being embedded in chalk sleeve 3 by the other end is drawn circle around flexible rule box 2 centers, now tape measure 6 one end are around base 1 central rotation, the other end is around chalk sleeve 3 central rotations, so just can guarantee the accuracy of drawn circle.Wherein the chalk sleeve of adjustable prolongation be by the second spring 21 with cover core, 18 mating reactions of the first stroke shell realize, and then can extend as required the length that chalk stretches out chalk sleeve 3.

Rope compasses described in the utility model replace rigidity plank with tape measure 6, thereby reduce the volume and weight of compasses; With sucker 4, replace compasses draw point, thereby increase the controllability of compasses and reduce the damage of compasses to blackboard; And the compasses chalk sleeve of being arranged to the chalk sleeve 3 replacement fixed diameter regular lengths of adjustable prolongation chalk in order to the chalk sleeve 3 of chalk to be installed, thereby the utilization rate of raising chalk.

Below be only concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, within all dropping on the utility model rights protection scope.

Claims

1. rope compasses, is characterized in that: comprise filling suctorial base, having the flexible rule box of stuck function and the chalk sleeve of adjustable prolongation, described flexible rule box is installed on base; On described chalk sleeve, be provided with roller, and described roller is connected with the tape measure in flexible rule box, and can be around base central rotation under the effect of tape measure, and then realized the function of drawing circle; Described flexible rule box comprises housing, scroll spring, chi dish and stuck device; One side of described scroll spring is fixed in the centered cylinder of housing, and opposite side is arranged in the groove of chi dish; Described tape measure is arranged on chi dish, and can be by driving chi dish to rotate to tighten scroll spring; Described stuck device is arranged in the rail groove of housing, and is connected with housing with the first spring.

2. rope compasses according to claim 1, 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; On described cylinder, have groove, and coordinate with Spring Card, flexible rule box is fixed on base.

3. rope compasses according to claim 1, is characterized in that: described chalk sleeve contains the first stroke shell, second shell, cover core, the second spring, and described the first stroke shell and second shell are threaded connection; 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 the second spring is fixed on the front portion of cover core, and one end of described the 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.