CN2159312Y - multifunctional drawing instrument - Google Patents

Abstract

The utility model relates to stationer goods, particularly a scale for drawing. One end of the drawing instrument is a half-angle apparatus, and a main scale provided with a groove on the middle part is connected with a vernier scale with the middle part as a groove through an arc-shaped half-angle end axle; a sliding projected end of a projected head sliding in the groove on the middle part of the main scale is in axial connection with a linked straight scale, and a sliding vernier is arranged in the groove on the middle part of the vernier scale; the scale surfaces of the main scale, the vernier scale and the linked straight scale are marked with scales accurate to millimeter, and the arc-shaped half-angle apparatus at one end of the main scale is provided with scales of 90 DEG. The utility model integrates the functions of a plurality of scales in one and is a multifunctional drawing instrument, having the advantages of convenient carrying, etc.

Description

multifunctional drawing instrument

The utility model relates to cultural goods, specifically a kind of the drawing with the improvement of chi.

Drawing commonly used is with having ruler, set square, protractor, compasses, T-square etc., their function singleness.When drawing a chart, often need several drawing appliances to use simultaneously, make troubles to the user.

The purpose of this utility model is the shortcoming at above-mentioned existence, provides a kind of collection one chi can finish the higher plotter of precision of multiple function.

Technical essential of the present utility model is: an end is the half-angle device, and the middle part has the main scale (5) of groove, is the vernier scale of groove (3) in the middle part of being coupling by arc half-angle end; Plush copper slide block (4) nose that slides in main scale (5) central groove interlock ruler (2) that is coupling is provided with slip vernier (1) in vernier scale (3) central groove; Being carved with the scale (6) that is accurate to millimeter on main scale (5), vernier scale (3), interlock ruler (2) chi face, is 90 ° scale (7) on the arc half-angle device of main scale (5) one ends.

The function of the multiple chi of the utility model collection is an one, is a kind of multi-functional drawing instrument.Advantages such as it is wide to have purposes, easy to carry are applicable to that school, factory, office and some Mapping departments use.The scale of chi face can be accurately with 1mm, and angular surveying is accurate to 1 °.The functions such as evolution that have the conversion between positive and negative trigonometric function simultaneously and count can conveniently be drawn various functional digraphs.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a main scale structural representation of the present utility model.

Fig. 3 is a main scale epirelief head slider structural representation of the present utility model.

Fig. 4 is a vernier scale structural representation of the present utility model.

Fig. 5 is a vernier structural representation on the vernier scale of the present utility model.

Fig. 6 is an interlock ruler structural representation of the present utility model.

Vernier scale of the present utility model (3) is gone up vernier (1) and can be taken away, and each parts adopts plastics or lucite to make.During use, main scale, vernier scale, interlock ruler all can be used as ruler and use.Main scale, vernier scale, interlock ruler are combined into set square at any angle.Main scale one end half-angle device has the scale in 0～90 °, during angulation, with main scale and vernier scale shaft contact is angular vertex, rotate vernier scale and can on the half-angle device, indicate angle by vernier scale one end, when angle during at 90 °～180 °, by little sharp platform indication angle on the vernier scale, desired value adds 90 ° and is institute's angle measurement value.Connecting point with vernier scale and main scale axle is the center of circle, with its to the vernier set aperture pitch from being radius, get final product picture circle or arc with rotating vernier scale behind these holes of insertion such as pencil, the interlock ruler of sliding convex head slide block and interlock thereof can be finished and paint one group of parallel lines T-square function.

Slide to cooperate as material object by vernier on the vernier scale and be measured as the slide calliper rule function with little sharp platform.The trigonometric function translation function is matched by main scale, vernier scale, interlock ruler and forms this function.For example: ask tg40 °=? the plush copper of then moving about slide block is to indicating the 10cm place, when rotating vernier scale to 40 ° of one end indications, rotates the interlock ruler perpendicular to the main scale limit, and then the ratio of reading is tg40 ° value on vernier scale and link ruler joining reading and the main scale.Ask sin for another example ^-10.61=? then be convenience of calculation, sliding convex head slide block to main scale indication 10cm place rotates vernier scale and interlock ruler, make it on the interlock chi, to show intersection point be 6.1cm place vertically, then angle shown in vernier scale one end is and asks.Its cofunction is asked method, and the rest may be inferred.The evolution function be by main scale, vernier scale, the interlock ruler is combined finishes, for example: ask $\sqrt{\mathrm{90}}$ =? then $\sqrt{\mathrm{90}}$ ＝ $\sqrt{\mathrm{81\; +\; 9}}$ =

Rotate the interlock ruler and make it indicate 9cm on main scale, rotate vernier scale, make the interlock ruler intersect at the 3cm place, then the intersection point scale is 90 value on the vernier scale.Amplifying reduction capability is: a geometric figure is amplified (exceeding with this chi length), and this is that the similar principle of plane geometric figure of utilizing each limit to be parallel to each other is finished.Drawing one group of parallel lines is: cooperated with the interlock ruler by main scale, the interlock ruler that the plush copper slide block drives on main scale perpendicular to main scale slides, and can draw one group of parallel lines.Function still can be developed at any time.

Claims (2)

1, a kind of multi-function drawing instrument has ruler and half-angle device, it is characterized in that an end is the half-angle device, and the middle part has the main scale (5) of groove, is the vernier scale of groove (3) in the middle part of being coupling by arc half-angle end; Plush copper slide block (4) nose that slides in main scale (5) central groove interlock ruler (2) that is coupling is provided with slip vernier (1) in vernier scale (3) central groove; Being carved with the scale (6) that is accurate to millimeter on main scale (5), vernier scale (3), interlock ruler (2) chi face, is 90 ° scale (7) on the arc half-angle device of main scale (5) one ends.

2,, it is characterized in that vernier (1) can be taken away on the vernier scale (3) according to the described multi-function drawing instrument of claim 1.

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