CN2152685Y - Translation compasses - Google Patents

Abstract

The utility model relates to a translation compasses, which is a drawing tool. The utility model comprises a rail ruler, a centering needle, a vernier and a joint. The utility model is characterized in that the rail rule has the functions of guide and indicating value to make the vernier be moved directly to the radius value when a circle is drawn. The centering needle and the pen core are vertical to a paper for drawing a circle. The ruler can directly draw the circle of the fixed value, can also independently measure a distance, and can form various compasses by replacing joints. The utility model is widely suitable for students, sheet-metal workers and engineers to use.

Description

Translation compasses

The utility model relates to drawing instrument.

Traditional compasses have following deficiency: drawing the definite value bowlder and need the very little circle of drawing again of amount object staff earlier, then is earlier than good measurement again, inconvenience during mapping.Draw bowlder because of undue force, radius changes easily, makes the circumference cross wires; When drawing concentric circles, the circle centre position pin hole enlarges easily, makes centering inaccurate.In a word, cumbersome with traditional compasses construction, be unfavorable for that high-quality is figure.Moreover, traditional compasses structure relative complex, set of tools number of packages is on the high side, and cost is higher.

One class scale is arranged, as patent 88209531.5 multi-functional combination scales, based on chi, the ruler combination, but justify owing to being bordering on paster, one use inconvenience, the drawing of easily making dirty again, and picture circle function is not strong.Another kind of drawing instrument comes the picture circle with row's aperture, as the omnipotent line drawing ruler of Bekaa, can only draw the circle of some size, and above-mentioned shortcoming is also arranged.

The purpose of this utility model is to provide a kind of novel surveying and mapping tool, give up the easy cross wires of traditional round programming bowlder circumference, circle center hole easily enlarge, will be elsewhere than shortcoming such as taking measurements, realize the combination of chi class function and compasses function.

The utility model comprises rail chi, centering pin, vernier and joint four parts.The rail chi both has been vernier guiding, plays the indicating value effect again, and graduation mark is arranged on it, and the cross section of guide rail can be circle, rectangle, triangle, arbitrary shape such as trapezoidal, can indicate the distance at centering pin and vernier center.Vernier bottom and blank area link, and change joint, can form various compasses, as drop bow, and pin rule, common dress lead for retractable pencil compasses are retouched line with compasses etc.But rail chi one-level level connects, and realizes the large scale mapping.

Can directly draw definite value circle of parallel-moving type ruler is directly read distance between two points, has saved the step of " ratio ", can make the raising of mapping speed.The all vertical paper mapping of its centering pin and pen core (making an exception when drawing roundlet) has solved cross wires and hole auxocardia problem.Change joint and can form various compasses, prolong the rail chi and can carry out large scale tolerance and mapping.Parallel-moving type ruler one-object-many-purposes is surveyed picture and all can.

Be further described below in conjunction with embodiment.

Fig. 1 is rectangular parallel-moving type ruler structural representation for rail chi cross section, and Fig. 2 is the profile that A-A place vernier cooperates with scale among Fig. 1.1 is scale, and 2 is vernier, and 3 is centering pin, and 4 is the epicone cap that plays the role of positioning, and 5 for clamping the nuts of pen core 6 usefulness, and 7 for to be used for preventing that vernier from skidding off the terminal of rail chi, and terminal can have ornamental.This scheme blank area and vernier partly unite two into one, and satisfy general mapping needs.

Fig. 3 is replaceable joint and the parallel-moving type ruler that prolongs the rail chi, and Fig. 4 is that the rail chi prolongs the structural representation that connects among Fig. 3, and rail chi cross section is a rectangle.1 is the rail chi, and 2 is vernier, and 3 is centering pin, 4 is centering pin epicone cap, and 5,6 is the screw that connecting joint and vernier are used, nut, 7 are joint (one cover parallel-moving type ruler multiple joint is arranged), 8 tighten tapered sleeve for joint, 9 is lead for retractable pencil, and 10 for prolonging the rail chi, and 11 for preventing the terminal that vernier skids off, 12,13 is draw bail, and convex-concave cooperates, can guarantee after the connection that vernier slides to prolongation smoothly, and front and back level rail chi size is continuous.

In addition, can strengthen metric function, the realization slide measure combines with the compasses function.Can add pencil or pen on terminal, the ball pen function is convenient to retouch line and size marking.

In a word, parallel-moving type ruler one-object-many-purposes, it is accurately quick to draw circle, easy to use.And, simple in structure, easily manufactured, with low cost.

Claims (2)

1, the parallel-moving type ruler comprises the rail chi, centering pin, and vernier and joint four parts, centering pin is at rail chi one end, and the two forms main body, and vernier links to each other with blank area and moves on the rail chi, it is characterized in that with the rail chi centering pin part and vernier partly being connected together.

2, parallel-moving type ruler according to claim 1, it is characterized in that: the rail chi can prolong, and blank area can be made separately, also can partly be integrated with vernier.