CN2104136U - Straight axle ruler angle compass - Google Patents

Abstract

The utility model provides the straight shaft type angle square compass, comprising a compass shaft, a shaft tine, a drawing arm, a support rod, a slide block protractor, a rotating shaft screw bolt and a loose nut, wherein, the compass shaft is a runner; the two ends of the support rod are connected with the drawing arm and the compass shaft by male pins; the slide block protractor and the upper end of the drawing arm are fixed in the runner to slide by the rotating shaft screw bolt and the loose nut; the upper end of the drawing arm is provided with angle pointers, the lower end is provided with a pen holder or a sleeve, and length scale marks with finite regulation are carved at the lower end; when the slide block protractor slides upward and downward, the drawing arm can contract and expand; the loose nut is tightly twist after choosing the required radius, and then the compass shaft is vertically put at the position of the center of a circle to draw the circle by rotation. Because the compass shaft always is perpendicular to the picture, the utility model can has good effect.

Description

Straight axle ruler angle compass

The utility model is a kind of diacytic type compasses that take measurement of an angle with the length function that have concurrently.

Bowlder drawn in the plane by traditional " people " font compasses because rule axle and drawn plane out of plumb, plane such as cement to hard, Glass blackboard etc., the pivot of rule axle can not protrude into, careless slightly, will slide in the center of circle, and the circle difficulty is drawn as, and bigger this problem of radius of circle is just more outstanding, on wooden plane, as drawing board, drawing board, though the tip of wooden blackboard isotactic axle can protrude into, but because the rule axle tilts and the conical surface rotates, can enlarge centre point, radius is bigger, centre point enlarges more severely, often causes the circumference can not be closed.The scheme of " replacing traditional nail head with universal transparent sucker " that Patent Gazette for Utility Models on April 12nd, 1989 disclosed " new type blackboard compasses " (application number 88213356.x) proposes can be avoided the sliding partially problem in the center of circle to a certain extent, but its rule axle is still the same with traditional compasses to favour drawn plane, and the problem that problem that the center of circle is slided partially when radius of circle is enough big and circumference can not closures still might occur.Therefore certain problem is all arranged, existing compasses mostly are the compasses of simple function, and along with the raising that mapping requires, people wish to have the instrument that integrates angulation, survey length and draw the circular arc function to occur.

The purpose of this utility model is to propose a kind of not sliding partially on rigid planar, and centre point is difficult for enlarging on soft plane, has to take measurement of an angle diacytic type chi, the angle compasses of length and picture straight line simultaneously.

This chi that the utility model proposes, angle compasses partly are made up of rule axle, picture arm, slide block protractor, strut, rotating shaft, degree of tightness nut, pivot, pen clip or the pen cap etc.The rule axle is made of two rectangular pivots and spindle nose, two rectangular have rectangular square chute, spindle nose is a cubic cylinder, so that there is the operating grip of square opening to be inserted in, on the pivot screw thread is arranged so that universal sucker centralizer can be turned round, there is a square square groove rule axle lower end near the pivot place, the base of groove and fixing with the rule axle on one side, the opposing party opens a hole so that pin connects strut, can draw in drawing arm simultaneously.Drawing arm is a flat rectangular slab, and the length graduation mark of last mint-mark certain rule is made for the usefulness of ruler, and to draw the arm upper end be cup head and have axis hole, is carved with angle indicator, and there is the pen clip or the pen cap of a changeable angle lower end, can clamp paintbrush or chalk etc.The slide block protractor is a cuboid slide block that matches with chute and the assembly of semicircular protractor, and steady for guaranteeing the slide block protractor, semicircular protractor has been done suitable expansion, and its base is concordant with rule axostylus axostyle long limit outwardly.Have axis hole on the slide block protractor, the center of circle of Kong Xinyu protractor overlaps and guarantees to slide on the center line of rule axle, the slide block protractor is with drawing the arm upper end on the axle bolt degree of tightness nut sleeve, be fixed in the chute of rule axles and can slide up and down, the position also can be fixed or changed by the degree of tightness nut in the groove.There is pin-and-hole at the strut two ends, and pin such as the available screw rod pin that nut is arranged is being drawn arm and advised on the axle, make the rule axle, draw adjustable triangular structure of formation between arm and strut three.

To advise axle during use vertically is put on the drawn plane, by the degree of tightness nut on the slide block protractor, the slide block protractor is slided up and down just can make the picture arm to contract and open, tighten the degree of tightness nut after getting accurate required radius size, firmly rotate rule one week of axle, just can draw down required circle.Radius size no matter, this compasses all can guarantee the rule axle perpendicular to picture, thereby as long as guarantee the rule axle vertically during operation, even the hard picture can not produce the problem of center of circle slip yet, when the upper drawing circle of soft plane such as chart board, also can centre point not enlarged, thereby cause the circumference can not closed phenomenon.Because operation the time can not guarantee to advise the problem that axle brings when vertical, to have certain screw thread on the pivot of advising spool in order preventing, can to load onto and resemble this class thing of the universal centralizer of sucked type and help at the smooth plane upper drawing circle of hard such as glass plate.Strut is detachable, and when dismantling, rule axle and picture arm can be used to angulation, setting-out and tolerance length.

In sum, the utility model design meets the mechanics requirement, can solve problems such as the center of circle of traditional compasses is sliding partially effectively, and mounting or dismounting is convenient, except that drawing circle, the function of protractor and ruler arranged still, the many usefulness of rule.Structure is simple again, and is easy to manufacture, all can with materials such as timber, plastics, lucite and stainless steels.

Below in conjunction with accompanying drawing the utility model is further specified.

Accompanying drawing 1 is the front view of diacytic type chi angle compasses.

Accompanying drawing 2 is left views of diacytic type chi angle compasses.

Accompanying drawing 3 is vertical views of diacytic type chi angle compasses.

Accompanying drawing 4 is rule axle front views (part is omitted).

Accompanying drawing 5 is A--A cutaway views.

Accompanying drawing 6 is rearviews (part) of rule axle.

Accompanying drawing 7 is front views of slide block protractor.

Accompanying drawing 8 is cutaway views of slide block protractor.

Accompanying drawing 9 is rearviews of slide block protractor.

Accompanying drawing 10 is front views of degree of tightness nut.

Accompanying drawing 11 is left views of degree of tightness nut.

Accompanying drawing 12 is rotating shaft bolt front views.

Accompanying drawing 13 is the universal centralizer three-dimensional cutaway views of colloid.

Rule axles (1) are made of high-quality timber, and the pivot of its lower end (8) has screw thread, can be fixed on the irony blockage, and blockage is screwed again at two rectangular that advise axle, makes rectangular channel (7) with sheet iron at last, and is fixed in rectangular lower end.Slide block protractor (2) is made of sheet iron and high-quality timber, slide block timber, protractor is used iron plate, drawing arm (3) and strut (6) also makes of timber, rotating shaft bolt (3) is consistent with the hole dimension of picture arm that is passed and slide block protractor with the size of degree of tightness nut (4), pen clip or cover (9) are made of tagger, also are fixed on the picture arm with pin and the rotatable angle of assurance and certain contact strength.After this compasses were made, height overall 60cm drew brachium 48cm, and the rectangular and width its gap of wide and rule axle two is 4cm.The most suitable teacher of universities, middle and primary schools of this compasses goes up several how courses of mathematics and uses.

Claims (5)

1, a kind of diacytic type chi angle compasses have rule axle, pivot, picture arm, it is characterized in that on the rule axle chute being arranged, and the slide block protractor that can move along chute and draw arm and all be enclosed within on the rotating shaft bolt has a strut between rule axle and picture arm.

2, by the described chi of claim 1 angle compasses, it is characterized in that 0 degree of slide block protractor and the center line of 180 degree scale correspondences and the central lines of chute.

By the described chi of claim 1 angle compasses, it is characterized in that 3, drawing on the arm has the length scale, there are the pen clip or the pen cap in the lower end, is carved with angle indicator on the center line of upper end.

4,, it is characterized in that the axle nail that connects strut, rule axle and draw arm can demolition by claim 1 or 2 described chi angle compasses.

5, by the described chi of claim 1 angle compasses, the pivot that it is characterized in that advising axle is a threaded ailhead.

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