CN2131713Y - Angle drawing ruler - Google Patents

Abstract

The utility model relates to a draw angle special ruler. The ruler is formed by combining a hollow graphometer with a special ruler through an arc-shaped chute. Because the ruler is connected with the chute, the chute can rotate around the center of the semicircle instrument, so that the ruler is driven to rotate around the semicircle instrument, the middle point on the main ruler edge of the ruler is always coincided with the center point of the semicircle instrument, thus, the angle drawing edge on the main ruler edge can form any included angle with the diameter edge of the semicircle instrument, and the angle of the included angle is just the angle indicated by the angle drawing edge on the semicircle instrument on the main ruler edge. The ruler has compact structure and convenient use, can be used for drawing angles and measuring angles, has high drawing cutin amount and can directly draw the sideline length of the angles, and in addition, the ruler also has the function of a short ruler.

Description

Angle drawing rule

The utility model relates to a kind of Angle drawing rule, and this chi is a kind of specific purpose tool of painting the angle, be suitable for engineers and technicians, teacher, use when the student draws, and the skilled worker uses during the setting-out setting-out on less object.

The existing angle specific purpose tool of painting mainly contains graphometer, various protractor, set square and other angle templates.But above-mentioned instrument or can not draw any angle, as: set square and various angle template can only be used for drawing special angle or specific angle; Perhaps can not be used for directly drawing any angle, as: when using graphometer or protractor to paint the angle, must point out angle mark earlier, use the summit at ruler linkage flag and angle then, just can draw the sideline at angle, and come with the required angle of another rectilinear(-al); The angle of perhaps drawing of low quality, for example: paint the angle with set square, often the summit is painted very baldly, usually needs allonge to repair the angle, and for example: paint the angle with graphometer or protractor, connect straight line behind the some mark earlier, start writing by twice and to finish, just how once starting writing may more error, simultaneously, it is clean and tidy that the mark trace tends to influence drawing again, thereby just may paint the cutin amount from drawing two aspect influences of precision and drawing tidiness.

Task of the present utility model provides a kind of Angle drawing rule, uses it only once to start writing and just can draw required any angle in higher quality determining need not to put angle mark on the basis on a sideline and summit.

Task of the present utility model is finished as follows: special ruler, the two is combined with an arc chute forms with transparent plastic system one hollow graphometer and.So-called hollow graphometer (being designated hereinafter simply as graphometer), be the one semicircle vacancy concentric with the graphometer semi arch to be arranged because of its center of circle portion, edge along this vacancy, one slide rail that raises up is arranged on graphometer, because the edge of vacancy is the semicircle arcuation, so this slide rail also is the semicircle arcuation, and also concentric with graphometer.So-called arc chute, leave a breach on the annulus of the sealing that in fact to can be considered in a cross section be Baltimore groove, the radian of this breach is 20 °-90 ° angle arc (being angle arc with hereinafter related radian), so, the radian of this arc chute (hereinafter to be referred as chute) is 340 °-270 °, match with slide rail with this chute, it is fastened on the slide rail, just can make it do circumferential slippage along slide rail, because the radian of slide rail is 180 °, the radian of chute is 270 °-340 °, so slide come what may, all has at least the chute of 90 ° of-160 ° of arc length always to remain on the slide rail.Because inside and outside two walls of chute are not contour, after chute was fastened on the slide rail, the external groove sidevall that slightly is shorter than the slide rail height still bumped the last plane less than graphometer, and the internal groove side wall of slightly being longer than slide rail and graphometer gross thickness exceeds the bottom surface of graphometer a little.With special ruler (hereinafter to be referred as ruler), be bonded on the chute inwall baseplane that slightly exceeds the graphometer bottom surface from the graphometer bottom, slide rail is clipped between ruler and the chute, the mid point on a chi limit of ruler and the arc core of chute are matched, and alignd with an end of chute arc length in this chi limit or slightly exceed this end, and form one from the breach of arc core outside arc with the other end, because this chi limit is the chi limit that is used for drawing this major function of sideline at angle, so be referred to as the main scale limit, wherein the end from mid point to chute arc breach is called and paints the arm of angle, with to paint the arm of angle relative, be called at the other end of mid point and show the arm of angle.As previously mentioned, because slide rail is concentric with graphometer, so match with slide rail, and the chute that is fastened on the slide rail is also concentric with graphometer, when chute when slide rail is done circumferential slippage, the ruler that is fixed on the chute also rotates thereupon, and the mid point on its main scale limit coincide all the time on the arc core of chute, promptly on the heart point of graphometer.Because graphometer is transparent, when the main scale limit show that the arm of angle refers on a certain scale on graphometer the time, its paint the arm of angle just with graphometer diameter limit shape in an angle, the angle of this angle just in time is to show the angle of arm of angle indication scale.Because the vacancy of graphometer heart portion, and ruler limit and the formed breach of chute arc end, can make the accurate without hindrance place of drawing pen milli on the heart point of graphometer, and along painting the arm of angle from the indentation, there straight line that draws, therefore, as long as the graphometer diameter limit of this Angle drawing rule is coincide on given straight line, the mid point on main scale limit is coincide on the summit at fixed angle, the arm of angle that shows with ruler is threaded on the scale at needed angle on the graphometer then, just can come in a sideline of drawing required angle, the angle that the line that this sideline and graphometer diameter limit are coincide is formed is exactly required angle.

Below in conjunction with accompanying drawing details of the present utility model is described further:

Fig. 1 is that the Angle drawing rule that the utility model proposes is in 0 ° of vertical view under the horn shape attitude, from this figure, beyond graphometer a fritter arcuation thing is only arranged, and it is the part of arc chute, thereby Angle drawing rule is seemed, and profile is simple, compact conformation.Because it is transparent that this figure does not show, can not see the overall picture of special ruler, but still the part ruler that places below the graphometer can be seen from the semicircle vacancy of graphometer heart portion that the intersection point on 0 graduation mark on this part ruler and ruler main scale limit is the heart point of graphometer.

Fig. 2 is an Angle drawing rule shown in Figure 1 cutaway view along graphometer diameter limit one line, this figure has disclosed the structure that hollow graphometer ［ 1 ］ combines by arc chute ［ 2 ］ and special ruler ［ 3 ］, can see the concave cross section of arc chute ［ 2 ］ among the figure, the height of its inside and outside two cell walls differs, internal groove side wall slightly exceeds the bottom of hollow graphometer ［ 1 ］ and is bonded in adhesive surface ［ 4 ］ with special ruler ［ 3 ］, and the position of the slide rail that raises up ［ 5 ］ on hollow graphometer ［ 1 ］ heart portion vacancy edge.This figure can also see a downward grand edge ［ 6 ］ on the semi-circle edge of hollow graphometer ［ 1 ］, (this figure is for correlating Fig. 1, the upper and lower position is inverted) when this grand edge ［ 6 ］ can make this Angle drawing rule be pressed on the drawing paper, keep a very little gap between its special ruler ［ 3 ］ and the paper, this gap can make special ruler ［ 3 ］ transfer angle with arc chute ［ 2 ］ rotation, during setting-out, only need to fix special ruler ［ 3 ］ by annotating arc chute ［ 2 ］.

Fig. 3 is the state diagram of this Angle drawing rule of Fig. 1 when being flared to 45, Yin Bentu does not show transparent, thereby can not directly see ruler show the indicating status of the arm of angle on graphometer, but can see the state of painting the arm of angle and graphometer diameter limit formation angle of ruler, can also see that painting the arm of angle one end chi face is marked with the length scale, like this, when drafting is shorter than the sideline at the angle of painting length that the arm of angle is marked, need put length mark and directly just can paint to Len req.

State diagram when Fig. 4 is threaded to 180 ° of angles for this Angle drawing rule of Fig. 1, this figure only is presented under this state, the opposite side on ruler main scale limit has the merit of short ruler, because this is an auxiliary function, therefore claim that this chi limit is secondary chi limit, the two ends that can also see ruler from this figure all are arcuation, and this is for the ease of ruler is rotated in the grand edge on graphometer arc limit.If make the arm of angle one end of painting of ruler more longerly, also be fine.Like this, just can draw longer line segment along painting the arm of angle and secondary chi limit.But just can not make ruler grand along interior any rotation, and can only be threaded to the state of this figure at most at graphometer.Simultaneously, also need correspondingly the grand edge of graphometer to be removed one section by the ruler width.

Fig. 5 is the part drawing of one of the parts of this Angle drawing rule of Fig. 1 hollow graphometer, the position of the semicircle vacancy of visible graphometer heart portion among the figure, and the position of the slide rail that raises up on graphometer along the edge of its vacancy.

Fig. 6 is the part drawing of one of the parts of this Angle drawing rule of Fig. 1 arc chute, and in order to see the particular location of chute, this figure will be originally that the chute that buckles has turned over and come.

Fig. 7 is the part drawing of one of the parts of this Angle drawing rule of Fig. 1 special ruler, the part that the arcuation projection is the capping of arc chute seen in the figure on the main scale limit, when ruler is bonded on the arc chute, there has been this piece arcuation projection just can 270 °-340 ° arc chute all to be covered, no matter where chute rotates to, can not separate like this from slide rail yet.

More than one group of accompanying drawing, all be that its graphometer diameter limit only is 10CM, is suitable for middle school student and uses, and for satisfying many-sided needs, this Angle drawing rule can be made the product of plurality of specifications according to the scale of 1:1.

Compare with the existing angle instrument of painting, the Angle drawing rule that the utility model provides has following advantage:

1. both can be used for painting the angle, can be used for again angulation;

2. on the basis on an existing sideline and summit, angle mark that it goes without doing is only once started writing and just can be drawn required any angle;

3. in the length that the ruler of this Angle drawing rule can reach, need not do length mark, just can directly the sideline at angle be painted to required length;

4. it is better to paint the cutin amount, and is coated with trace because of nothing mark trace has reduced;

5. compact conformation, intuitive is good, helps the understanding at student diagonal angle;

6. use and carry all easily, the student only need be with this chi, just can save at one stroke and carry a graphometer and two set squares, even also can save and carry ruler.

Claims (6)

1, one by hollow graphometer [1] by the Angle drawing rule that arc chute [2] and special ruler [3] combine, it is characterized in that:

There is a semicircle vacancy concentric with its semi-circle edge in the center of circle portion of a, described hollow graphometer [1],

B, along the edge of this vacancy, a slide rail that raises up [5] is arranged on hollow graphometer [1],

C, described arc chute [2] is fastened on the slide rail [5],

D, be bonded in adhesive surface [4] from the bottom of hollow graphometer [1] with described special ruler [3] and the internal groove side wall that slightly exceeds the arc chute [2] of hollow graphometer [1] bottom surface, the mid point on the main scale limit of special ruler [3] and the arc core of arc chute [2] are matched, and make the arm of angle of painting on main scale limit align with an end of the arc length of arc chute [2] or slightly exceed this end, and form one from the breach of arc core outside arc with the other end.

2, Angle drawing rule according to claim 1 is characterized in that the semi-circle edge of graphometer ［ 1 ］ has a downward protuberance ［ 6 ］.

3, Angle drawing rule according to claim 1, the cross section that it is characterized in that arc chute ［ 2 ］ is a spill, radian is 270 °～340 ° (angle arc).

4, Angle drawing rule according to claim 1 is characterized in that on the main scale limit of special ruler ［ 3 ］ an arcuation projection being arranged, and is used for arc chute ［ 2 ］ is all covered.

5, Angle drawing rule according to claim 1 is characterized in that the main scale limit of special ruler ［ 3 ］ is marked with centre point and length scale.

6, Angle drawing rule according to claim 1 is characterized in that the secondary chi limit of special ruler ［ 3 ］ is marked with the length scale.

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