CN2140839Y - Backing board specially adapted for drawing off and on line - Google Patents

Abstract

The utility model discloses a backing board specially adapted for drawing off and on line. In order to solve the problem that the worker needs lift and fall the pen repeatedly in manually drawing off and on line, such as broken line and dash-dot line and the off and on line is not even, the backing board specially adapted for drawing off and on line is provided with a row of holes on a thin board. A part of the thin board is put under the straightedge in drawing. When the pen point passes each hole, the pen can draw up one draw of the off and on line on the paper. When the pen point slips the thin board between two holes, the gap between two adjacent draws of the off and on line is arranged on the paper. So the pen can draw an off and on line which is matched with the backing board in one draw.

Description

Backing board specially adapted for drawing off and on line

The utility model relates to a kind of drafting instrument, and being described more specifically is the special-purpose backing plate of a kind of picture dashed line.

During drawing, drafting dashed line such as dotted line, chain-dotted line need be lifted pen repeatedly and start to write, and every stroke of length drawing out is inhomogeneous accurately, not exclusively satisfies the criteria.Unspecial design solves this not only the trouble but also inaccurate problem in the existing drafting instrument.

The purpose of this utility model provides the special-purpose backing plate of a kind of picture dashed line.Cooperate ruler or set square with it, can go out a complete standardized dashed line by unicursal.

For addressing the above problem, the scheme that the utility model adopts is: on a thin plate, open at least one round.During drawing with its a part of pad under ruler, when a drawing nib along ruler during by each hole, the stroke of the dashed line that just on paper, draws; When nib slips over backing plate between adjacent two holes, just vacating the gap of resolving between adjacent two strokes of continuous line on the paper, thereby unicursal goes out a dashed line.Suitably determine the portion size of a round mesopore and the distance of adjacent two spans, make they respectively and a kind of gaps long and between adjacent two strokes of drawing of dashed line be complementary, an evenly dashed line accurately easily just can draw.

Because the utility model does very thinly, the drawing pen can slip over the backing plate part between adjacent two holes in the round smoothly, so cooperate ruler or set square with it, does not need to lift repeatedly the pen complete standardized dashed line that just can draw of starting to write.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is a schematic diagram of the present utility model

Fig. 2 is first specific embodiment schematic diagram of the present utility model

Fig. 3 is second specific embodiment schematic diagram of the present utility model

Fig. 4 is a most preferred embodiment schematic diagram of the present utility model

The hole that Fig. 1 shows on the utility model is arranged in a row.Gap in this round between adjacent two strokes of the distance of adjacent two spans and dashed line is complementary.The shape in hole is polygonal hole such as square opening, bar hole or the like.Mate along the size of round row direction and the appearance of drawing of dashed line in the hole, as the bar hole that vertically is arranged in a row sidewards, and stroke appearance coupling of the width in hole and dashed line.The foregoing of one round is determined according to a kind of dashed line, they is mated mutually.

Fig. 2 shows first specific embodiment of the present utility model.Hole on the thin plate is arranged in a row.Gap between adjacent two strokes of the distance of adjacent two spans and dotted line is complementary.The shape in hole is the parallel bar hole of dual-side, every stroke of appearance coupling of its width and dotted line.

Fig. 3 shows second specific embodiment of the present utility model.Hole on the thin plate is arranged in a row.The distance of adjacent two spans and chain-dotted line consecutive points, the gap between drawing are complementary.The shape in hole is the parallel bar hole of dual-side and polygonal hole such as square opening.The width of bar hole and dashdotted point are complementary, and polygonal hole is along size of round row direction (as the length of square opening or wide) and dashdotted stroke appearance coupling.

Fig. 4 is one of most preferred embodiment of the present utility model.It is to open two rounds on a thin plate, is complementary with dotted line and chain-dotted line respectively, reaches the purpose that can draw two kinds of dashed lines with a backing plate.

Adopt scheme of the present utility model, can make and be used for the various dashed line backing plates of picture.By on a plate, doing the shape of multiple round combination or suitable selecting hole, can also reach the function that a plate is used more or a round is used more.

Claims (1)

1, a kind of special-purpose backing plate of drawing dashed line is characterized in that the hole that is arranged at least one row is arranged on backing plate.

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