CN202986529U

CN202986529U - Portable compass

Info

Publication number: CN202986529U
Application number: CN 201320016835
Authority: CN
Inventors: 章浩燕; 于春令
Original assignee: Ningbo University
Current assignee: Ningbo University
Priority date: 2013-01-11
Filing date: 2013-01-11
Publication date: 2013-06-12
Anticipated expiration: 2023-01-11

Abstract

The utility model relates to a portable compass which comprises a center shaft rod and painting rods. A fixed needle is arranged at the bottom of the center shaft rod. First ends of the painting rods are connection with the center shaft rod, and second ends of the painting rods are provided with painting pens. The portable compass is characterized in that the painting rods are at least two in number, one ends of all the painting rods are connected with a connecting piece, and the connecting piece is fixed on the center shaft rod in a sleeved mode and capable of vertically sliding along the center shaft rod. Graduated scales are respectively arranged between the center shaft rod and the second ends of the painting rods, one end of each graduated scale is fixedly connected with the center shaft rod, and the other end of each graduated scale is contracted in to the painting pens. Compared with the prior art, the portable compass is small in rotating angles, capable of drawing a target circle without the graduated scales, quite convenient and fast.

Description

Portable type compasses

Technical field

The utility model relates to a kind of drawing tool, relates in particular to a kind of Portable type compasses.

Background technology

Compasses are a kind of instruments for draw circles or string, are usually used in construction with ruler and compasses.Common compasses generally comprise the parts such as nib, rotating shaft, compasses supporting leg, lattice chi, handwriting, nib, compasses point.In use, common compasses need by rule, compasses point and the distance of nib to be adjusted to the length that needs, then the compasses point is fixed on drawing, compasses supporting leg with nib moves in a circle around the compasses point, because the compasses supporting leg need be done 360 ° of rotations, be easy to occur skidding, and the compasses point that is used for fixing is needle-like member, often can be because prick because of carelessness hand, cause danger; And existing compasses can not draw drawing bowlder the circle that needs radius size in real time.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of easy to use, quick, Portable type compasses that can draw in real time the circle that needs radius size for prior art.

The utility model solves the problems of the technologies described above the technical scheme that adopts: a kind of Portable type compasses, comprise central shaft and draw bar, wherein the bottom of central shaft is provided with locking pin, the first end of drawing bar is connected with central shaft, the second end of drawing bar is provided with the pen of drawing, it is characterized in that: the number of described picture bar is at least 2, and the first end of respectively drawing bar all is connected on a connection piece, and this connector is sheathed to be fixed on central shaft and can to slide up and down along central shaft; Be respectively arranged with a rule between the second segment of described central shaft and each picture bar, an end of each rule is fixedly connected with central shaft, and the other end shrinks in propelling pencil.

Described connector can be fixedly connected with central shaft in several ways, as preferably, described connector is fixed on described central shaft by nut, can adjust by adjusting nut the height of picture bar like this, thereby propelling pencil is adjusted to the radius that needs.

The one station pin that is connected with central shaft is set outside described locking pin, so not only can improves the steadiness of central point in the picture process, and can prevent that the needle point of locking pin from stabbing hand; As preferably, described station pin is transparent round table-like, can observe the locking pin state by transparent station pin in mapping process like this, prevent that locking pin from tilting mobile.

From the above mentioned, the number of drawing bar is at least 2, as preferably, the number of described picture bar is 4, be distributed on the central shaft surrounding, so not only can further improve the steadiness of central point in the mapping process, and draw and to draw bar in the circle process and only need rotate 90 ° and can draw a complete circle, avoided the excessive problem of bringing of traditional compasses anglec of rotation.

In order to facilitate reading, the zero graduation of each rule and described locking pin are on same vertical line, are provided be used to the hollow out frame that reads the rule reading on a described picture shell.

As improvement, the upper end of described central shaft is provided with Anti-slip cover.

Improve, described picture bar is expansion link again.

Compared with prior art, the utility model has the advantage of: 2 picture bars are set at least, can avoid common compasses because the anglec of rotation excessive (360 °) is brought the problem such as skid, list action is excessive, 4 picture bars wherein are set, only need gently half-twist just can intactly draw circle; Draw between the bar second segment at central shaft and each rule be set, need not so in addition directly just to adjust by the rule that carries on compasses the radius that needs by rule in the mapping process, make map more convenient.

Description of drawings

Fig. 1 is the perspective view of Portable type compasses in the utility model embodiment;

Fig. 2 is the perspective view under Portable type compasses use state in the utility model embodiment.

The specific embodiment

Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.

as Fig. 1, shown in 2, Portable type compasses in the utility model, comprise central shaft 1 and four flexible picture bars 2, wherein an end of central shaft 1 is provided with Anti-slip cover 11, the other end is provided with locking pin 12, four flexible picture bars 2 are distributed on central shaft 1 surrounding, and the first end of four flexible picture bars 2 all is rotationally connected with on connector 13, this connector 13 is fixed on central shaft 1 by nut 15 is sheathed, and can slide up and down along central shaft 1 by adjusting nut 15, the second end of four flexible picture bars 2 is equipped with the pen 21 of drawing, be respectively arranged with flex-steel tape rule 3 between central shaft 1 and four flexible picture bars 2, be to be provided with 4 flex-steel tape rules 3 in the present embodiment, and the first end of each flex-steel tape rule 3 is fixedly connected with central shaft 1, the other end shrinks in the pen 21 of drawing, the zero graduation of each flex-steel tape rule 3 and described locking pin 12 are on same vertical line, and be provided be used to the hollow out frame 212 that reads the rule reading on each pen 21 shell of drawing, conveniently to read the reading of flex-steel tape rule 3, the outer transparent round table-like station pin 14 that is connected with central shaft 1 that arranges of locking pin 12, so not only can observe by this transparent station pin 14 state of locking pin 12, prevent that central point from moving, improve the steadiness of central point, and can prevent that the needle point of locking pin 12 from stabbing hand.

In use procedure, at first adjust the nut 15 on connector 13, after the scale of needs having occurred in the hollow out frame 212 of the pen 21 of drawing, screw nut 15, locking pin 12 vertically is fixed in target circle in the heart, then on the Anti-slip cover 11 with hand centering axostylus axostyle 1, rotation gently, the nib 211 on figure paintbrush 21 be circular arc under drawing paper is drawn immediately, when rotating to 90 °, each is drawn nib 211 on bar 2 and draws that lower circular arc connects, closure, forms and justifies.

Claims

1. Portable type compasses, comprise central shaft and draw bar, wherein the bottom of central shaft is provided with locking pin, the first end of drawing bar is connected with central shaft, the second end of drawing bar is provided with the pen of drawing, it is characterized in that: the number of described picture bar is at least 2, and the first end of respectively drawing bar all is connected on a connection piece, and this connector is sheathed to be fixed on central shaft and can to slide up and down along central shaft; Be respectively arranged with a rule between the second end of described central shaft and each picture bar, an end of each rule is fixedly connected with central shaft, and the other end shrinks in the pen of drawing.

2. Portable type compasses according to claim 1, it is characterized in that: described connector is fixed on described central shaft by nut.

3. Portable type compasses according to claim 1, is characterized in that: a station pin that is connected with central shaft is set outside described locking pin.

4. Portable type compasses according to claim 3, it is characterized in that: described station pin is transparent round table-like.

5. according to claim 1～4 described Portable type compasses, it is characterized in that: the number of described picture bar is 4, is distributed on the central shaft surrounding.

6. according to claim 1～4 described Portable type compasses, it is characterized in that: the zero graduation of each rule and described locking pin are on same vertical line, are provided be used to the hollow out frame that reads the rule reading on a described picture shell.

7. according to claim 1～4 described Portable type compasses, it is characterized in that: the upper end of described central shaft is provided with Anti-slip cover.

8. according to claim 1～4 described Portable type compasses, it is characterized in that: described picture bar is expansion link.