CN2056127U - Drawing instrument - Google Patents

Abstract

The utility model discloses a drawing apparatus which is a multifunction drawing apparatus and is composed of a gravitation pin device or a compass device, which is arranged against an object drawing lines. Enhancing the drawing efficiency, the utility model has the functions of a straightedge, a set-square, a protractor, compasses and elliptical compasses, and is very convenient for drawing.

Description

Drawing instrument

The utility model belongs to drawing appliance.

Drawing appliances such as the ruler that uses, set square, protractor, compasses all have the single shortcoming of drawing function now.

The purpose of this utility model is that a kind of drawing appliance with multiple drawing function will be provided.

The purpose of this utility model is achieved like this: on the object (hereinafter to be referred as object) of drawing straight line, load onto the gravity needle device or the compass device of indication angle at an energy, perhaps load onto gravity needle device and compass device simultaneously.Such structure just has multiple drawing function.The gravity pin of gravity needle device is subjected to the effect of gravity, and it is constant always to point to clinoplain sloping floor direction in clinoplain.The compass of compass device is subjected to the effect of telluric magnetic force, and it is constant always to point to North and South direction in horizontal plane.But the angle index of gravity needle device or compass device rotates with object.The angle of object setting-out limit and gravity pin or compass direction indication just can be indicated on angle index by gravity pin or compass.The straight line that becomes various different angles with gravity pin or compass direction indication that just can draw against object setting-out limit like this comes, thereby can draw fundamental figures such as known number of degrees angle, known number of degrees cross linear, parallel lines according to the setting-out differential seat angle, the number of degrees that also can measure angle of departure come, and then other complex figures that can draw come.The utility model has just possessed the repertoire of ruler, set square, protractor like this.The leg of compasses is can be against the object of drawing straight line.On the leg of compasses, load onto gravity needle device or compass device, perhaps load onto two kinds of devices simultaneously.The utility model has just increased the function of drawing arc, drawing circle again.If load onto above-mentioned one or both devices on the ellipsograph leg, the utility model has just increased again draws oval function.

When drawing known number of degrees angle or cross linear with the utility model, because indicated angle number of degrees difference was determined when the angle between drawn two straight lines can be from gravity pin or twice setting-out of compass, get line ready and be drawn as so needn't measure like that earlier, but two can be drawn as drawing appliance.As long as guarantee that the angle of gravity pin or compass indication is constant, the angle that constitutes between the straight line that leans on setting-out limit of object to draw all is that zero degree is that straight line is parallel to each other.The remote parallel lines that general drawing appliance is difficult to draw so the utility model just can draw.Draw with the utility model like this and just can make things convenient for, save time, raise the efficiency.

Below in conjunction with accompanying drawing the utility model is further described in detail:

The utility model is as a kind of structure of drawing in the horizontal plane such as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4.Wherein Fig. 1 is this structural front view.Fig. 2 is that this structure is along A-A line cutaway view.Fig. 3 is a guide needle shaft front view.Fig. 4 is a compass magnet cross-sectional view.This structure is loaded on ruler (2) and is gone up formation by compass device (1).Ruler (2) is that an energy is against the object of drawing straight line.Compass device is by compass (3), guide dials (4), compass disk cover (5), compass bearing compositions such as (6,7).Compass is made up of compass magnet and guide needle shaft again.The compass magnet is a cross section strip as shown in Figure 4.The south poles of compass magnet is coated with different colouring discriminations.The guide needle shaft as shown in Figure 3, its upper and lower side all is a cone, its middle part jagged (8).Guide needle shaft breach (8) is put at the rectangular middle part of compass magnet, with strong binding agent glue compass (3).Guide dials (4) is made with non-ferrous metal, and its bottom center has screw, and compass bearing (7) is housed in the hole.Compass disk cover (5) is made with lucite, and its central authorities are embedded with compass bearing (6), and its lower plane also is carved with all angle scales (9), and the assembly relation of compass device as shown in Figure 2.Compass disk cover (5) sticks on the guide dials (4) with binding agent.With the moving compass bearing (7) of the swivel of going to the lavatory.The adjustable bearings gap.The hole (10) of guide dials (4) bottom is that to be convenient to clamping during for dress compass (3) set.The compass tray bottom sticks on the ruler (2).Compass device (1) is loaded on when ruler (2) is gone up will make the bottom surface of guide needle shaft perpendicular to ruler (2), and the zero line of angle index (9) and 180 degree lines are paralleled with the setting-out limit (11) of ruler (2).

About 0.2 mm wide of leptoprosopy on the compass magnet (12) is so that aim at scale, accuracy of reading.The guide dials adopts non-ferrous metal to make, and be in order to produce eddy current on guide dials (4) flange when compass (3) swing, thereby the effect of generation magnetomechanical damping is stopped compass rapidly.For making compass (3) indication accurately, this structure is except that compass.Should not adopt ferromagnetic material to make.

If on compass, load onto dial, and on the compass disk cover, engrave index line, also can make compass indication orientation and indicate angle.No matter how the part of compass device changes, be exactly the said compass device of this specification so long as under the effect of telluric magnetic force, can indicate orientation, indication angle.

When drawing, the bottom of ruler (2) is affixed in the horizontal drawing surface, can draws arbitrary line by the setting-out limit (11) of ruler (2) with this structure.When drawing the angle of the known number of degrees and cross linear, as long as compass indication number of degrees difference is for will draw the number of degrees of angle or cross linear the time when guaranteeing against (11) twice setting-out of ruler (2) setting-out limit.Angle of drawing or cross linear are angle or the cross linear that will draw.During angulation with the setting-out limit (11) of ruler (2) during successively against two sidelines at angle, twice index of compass poor, the i.e. number of degrees at angle for this reason.When drawing parallel lines, as long as guarantee that the compass indication number of degrees are constant, all be parallel, so just can draw remote parallel lines by the drawn straight line in ruler (2) setting-out limit (11).Can draw and state fundamental figure, just can draw other complex figures.If refill the gravity needle device on ruler (2), this structure also can be drawn in the inclined plane.

The utility model is as a kind of structure such as Fig. 5, shown in Figure 6 of drawing in clinoplain.Wherein Fig. 5 is this structural front view, and Fig. 6 is that this structure is along B-B line profile.This structure is loaded on compasses (14) by gravity needle device (13) and goes up formation.The leg of compasses is can be against the object of drawing straight line, and the gravity needle device just is contained on the one leg (15) of compasses.The gravity needle device is by gravity pin (16), and gravity needle shaft (17), semicircle gravity dials (18) and gravity dials cover (19) to be formed.The cross section of gravity pin (16) is also as Fig. 4 shape.The dead eye of gravity pin one end is enclosed within on the gravity needle shaft (17).Gravity dials lid lower plane is carved with 180 degree angle indexs (20).Gravity dials lid (19) is bonded on the gravity dials (18).Gravity needle shaft (17) center line is by gravity pin lid (19) semicircle center.Gravity dials bottom surface is bonded on the leg (15) of compasses (14), and the zero line of angle index should be parallel with the setting-out limit (21) of compass leg (15) with 180 degree lines.Gravity needle shaft (17) should be perpendicular to the plane (22) of compass leg (15).

During gravity pin (16) swing, the damping action that is subjected to the air in the gravity dials (18) can be stopped very soon.If need make the gravity pin sensitiveer, the axle of gravity pin and bearing can adopt the axle and the bearing arrangement of above-mentioned compass.If refilling compass device on the leg of compasses, this structure also can be drawn in horizontal plane.No matter how the gravity needle device changes, as long as can indicate orientation under the gravity effect, the indication angle is exactly said here gravity needle device.

Using method of this structure and said structure are roughly the same.

Claims (3)

1, a kind of drawing appliance is characterized in that: can load onto gravity needle device (13) on the object ruler (2) of drawing straight line, or compass device (1) constitutes.

2, a kind of drawing appliance is characterized in that: can load onto gravity needle device (13), or compass device (1) constitute on the object garden rule legs (15) of drawing straight line.

3, a kind of drawing appliance is characterized in that: can against the object of drawing straight line on the rule leg of ellipse garden, load onto gravity needle device (13), or compass device (1) constitute.

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