CN208484446U - A kind of curve drawing tools - Google Patents

Abstract

A kind of curve drawing tools, including lower cover plate and equipped with the upper cover plate of upper hopper chute, between form hollow cavity and side chute, the connecting rod that length can change is equipped on the inside of lower cover plate, slide bar and coiling shaft are respectively symmetrically equipped in connecting rod two sides, connecting rod one end is fixed on lower cover plate, the other end is equipped with the aperture for installing paintbrush, the bolt for being pierced by upper hopper chute upwards is fixed on slide bar, the card slot of fixed filament is respectively equipped at the both ends of slide bar, the height of card slot is greater than side chute, to guarantee that slide bar is in cavity always, the upper end of coiling shaft upwardly extends and is pierced by upper cover plate, part is pierced by be nested in the thumb wheel being arranged on upper cover plate, the nut being connected with bolt to fixed slip bar position is additionally provided on upper cover plate.The utility model compact can not only do teaching and use, also use on homework book for student, can know from experience the forming process of figure, and to understanding, oval, hyp definition is very helpful.

Description

A kind of curve drawing tools

Technical field

The utility model belongs to teaching equipment field, and in particular to a kind of curve drawing tools.

Background technique

In middle school's study or in some engineerings, it is often necessary to draw some curves, such as circle, oval, hyperbola, drawing circle has Compasses, but oval, hyperbola does not have proper tool, has partial monopoly to disclose for the teaching demonstration on blackboard yet Oval drawing instrument, but be not suitable for student and draw on homework book, in addition to this, for other curves such as hyperbola, there are no special Drawing tools.

Summary of the invention

For overcome the deficiencies in the prior art, it the purpose of the utility model is to provide a kind of curve drawing tools, not only fits It closes student to draw on homework book, moreover it is possible to draw the particular curves figure such as hyperbola.

In order to achieve the above object, the technical scheme adopted by the utility model is that:

A kind of curve drawing tools, including lower cover plate and equipped with the upper cover plate of upper hopper chute, the upper cover plate and lower cover plate shape A side chute is respectively formed at hollow cavity, and in front and rear sides, the center on the inside of lower cover plate is equipped with length can The connecting rod of variation in connecting rod two sides, is respectively symmetrically equipped with slide bar and coiling shaft from the near to the distant, and described connecting rod one end is fixed on down On cover board, the other end is equipped with the aperture that can install paintbrush, the bolt for being pierced by upper hopper chute upwards is fixed on slide bar, in slide bar Both ends be respectively provided with the card slot of fixed filament, the height of the card slot is greater than the height of side chute, to guarantee that slide bar begins Eventually in cavity, the upper end of the coiling shaft upwardly extends and is pierced by upper cover plate, is pierced by part and is nested in setting in upper cover In thumb wheel on plate, by the rotation of thumb wheel, it is able to drive the rotation of coiling shaft, the filament for that will pull out is withdrawn, in upper cover The nut being connected with bolt to fixed slip bar position is additionally provided on plate.

Further, the upper cover plate is connected in a snap-fit manner with lower cover plate.

Further, the both ends of the hollow cavity are arc-shaped, hollow cavity long 10cm, wide 0.5cm, high 0.4cm.

Further, two sides are equipped with the graduation mark for identifying distance between two card slots above and below side chute.

Further, the card slot includes cored slab, and it is round that the A connected there are two diameter difference, intersection are set on cored slab Hole and B circular hole, are equipped with cylindrical body in A circular hole, and the diameter of the cylindrical body is less than A circular hole and is greater than B circular hole.

Further, the connecting rod is made of several pipe nipples, and the adjacent pipe nipple of every two is using suit mode and uses shaft It is connected.

Further, the paintbrush includes pen container, and wire spool and pen core are equipped in pen container.

The utility model has the beneficial effects that

The utility model compact can not only do teaching and use, also use on homework book for student, be slided by adjusting The position of bar draws different size of oval, hyperbola or circle, additionally it is possible to the forming process for knowing from experience figure, oval to understanding, Hyp definition is very helpful.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the utility model cavity body internal structure chart；

Fig. 3 is notch figure；

Fig. 4 is paintbrush sectional view；

In figure, 1, connecting rod, 2, filament, 3, card slot, 31, cored slab, 32, A circular hole, 33, cylindrical body, 34, B circular hole, 4, side Sliding slot, 5, lower cover plate, 6, upper cover plate, 7, thumb wheel, 8, nut, 9, upper hopper chute, 11, bolt, 12, slide bar, 13, pen container, 14, coiling Disk, 15, pen core.

Specific embodiment

The utility model is described in further detail combined with specific embodiments below.

Embodiment

As depicted in figs. 1 and 2, a kind of curve drawing tools, including lower cover plate 5 and equipped with the upper cover plate 6 of upper hopper chute 9, institute It states upper cover plate 6 to be connected in a snap-fit manner with lower cover plate 5, forms hollow cavity, and form two side chutes in front and rear sides 4, the graduation mark of distance between two card slots 3 of mark is equipped in about 4 two sides of side chute；

The both ends of the hollow cavity are arc-shaped, and center on lower cover plate 5 is equipped with to be made of three pipe nipples Connecting rod 1, the adjacent pipe nipple of every two are connected using suit mode and using shaft, and the length of connecting rod 1 is drawn as needed The size of figure is changed, and in 1 two sides of connecting rod, is respectively symmetrically equipped with slide bar 12 and coiling shaft 10, the connecting rod 1 from the near to the distant One end is fixed on lower cover plate 5, and the other end is equipped with the aperture that can install paintbrush, is fixed on slide bar 12 and is pierced by upper cunning upwards The bolt 11 of slot 9 is respectively provided with the card slot 3 of fixed filament 2 at the both ends of slide bar 12, and the height of the card slot 3 is greater than side Sliding slot 4, to guarantee that slide bar 12 is in cavity always, the upper end of the coiling shaft 10 upwardly extends and is pierced by upper cover plate 6, wears It is partially nested in the thumb wheel 7 being arranged on upper cover plate 6 out, by the rotation of thumb wheel 7, is able to drive the rotation of coiling shaft 10, For withdrawing the filament 2 of pull-out, the nut 8 being connected with bolt 11 to 12 position of fixed slip bar is additionally provided on upper cover plate 6.

As shown in figure 3, the card slot 3 includes cored slab 31, is set on cored slab there are two diameter difference, intersects connection A circular hole 32 and B circular hole 34 are equipped with cylindrical body 33 in A circular hole 32, and the cylindrical body has elasticity, and diameter is less than A circular hole 32 And it is greater than B circular hole 34, when cylindrical body is pushed into B circular hole 34 from A circular hole 32, filament can be fixed.

As shown in figure 4, the paintbrush includes pen container 13, wire spool 14 and pen core 15, pen core and two are equipped in pen container 13 Strand is stretched out out of pen container simultaneously, when drawing hyperbola, coiling disk rotating speed is controlled with hand, so that pen tip and filament synchronizing moving.

When drawing oval, according to the needs of picture size, the position of slide bar is adjusted, and then determine that two bolts (are equivalent to Elliptical two focuses) distance, accordingly obtain the relative position of two card slots, tighten nut, card slot is fixed；Then Suitable filament is pulled out by two card slots, the cylindrical body downward push in card slot is pushed in B circular hole, it is thin by what is be exposed Line is fixed；Paintbrush is inserted into again in the aperture of connecting rod end, and filament is covered on paintbrush, half of ellipse can be drawn, changed another One direction can draw the other half.

When drawing hyperbola, according to the needs of picture size, the position of slide bar is adjusted, and then determines two bolts (quite In two focuses) distance, accordingly obtain the relative position of two card slots, tighten nut, card slot is fixed；It is drawn from card slot Filament out lacks while mostly as needed, then the endpoint of filament is fixed, later, from the midpoint of two focuses Start, it is by two strands of filament and together, then since the end of two strands, two strands are simultaneously wound on wire spool, then, It is drawn lines since side chute with paintbrush, with the revolving speed of hand control wire spool, keeps filament to tighten, hyperbola can be drawn, by two The simultaneously wound purpose on wire spool of strand, be guarantee pen core track every bit to two bolts (i.e. focus) distance it Difference remains unchanged.

Bowlder is drawn, does not need to pull out on each section connecting rod, need to be only inserted into paintbrush solid in shaft hole according to round size It is fixed, put on filament picture.

Oval, hyperbola can be accurately drawn using the drawing tools of the utility model, and theirs can be known from experience Forming process, to understanding, oval, hyp definition is very helpful.

Claims (7)

1. a kind of curve drawing tools, it is characterised in that: including lower cover plate (5) and equipped with the upper cover plate (6) of upper hopper chute (9), institute It states upper cover plate (6) and lower cover plate (5) and forms hollow cavity, and respectively form a side chute (4) in front and rear sides, in lower cover plate (5) center on the inside of is equipped with the connecting rod (1) that length can change, and in connecting rod (1) two sides, is from the near to the distant respectively symmetrically equipped with Slide bar (12) and coiling shaft (10), described connecting rod (1) one end are fixed on lower cover plate (5), and the other end, which is equipped with, can install picture The aperture of pen is fixed with the bolt (11) for being pierced by upper hopper chute (9) upwards on slide bar (12), sets respectively at the both ends of slide bar (12) There is the card slot (3) for fixing filament (2), the height of the card slot (3) is greater than the height of side chute (4), to guarantee slide bar (12) always in cavity, the upper end of the coiling shaft (10) upwardly extends and is pierced by upper cover plate (6), is pierced by part nesting In being arranged in the thumb wheel (7) on upper cover plate (6), by the rotation of thumb wheel (7), it is able to drive coiling shaft (10) rotation, is used The filament (2) that will be pulled out is withdrawn, and is additionally provided on upper cover plate (6) and is connected with bolt (11) to fixed slip bar (12) position Nut (8).

2. a kind of curve drawing tools as described in claim 1, it is characterised in that: the upper cover plate (6) and lower cover plate (5) with Snap is connected.

3. a kind of curve drawing tools as described in claim 1, it is characterised in that: the both ends of the hollow cavity are circular arc Shape, hollow cavity long 10cm, wide 0.5cm, high 0.4cm.

4. a kind of curve drawing tools as described in claim 1, it is characterised in that: in side chute (4), two sides are equipped with mark up and down Know the graduation mark of distance between two card slots (3).

5. a kind of curve drawing tools as described in claim 1, it is characterised in that: the card slot (3) includes cored slab (31), It is set on cored slab there are two the A circular hole (32) and B circular hole (34) of diameter difference, intersection connection, is equipped with and justifies in A circular hole (32) The diameter of cylinder (33), the cylindrical body is less than A circular hole (32) and is greater than B circular hole (34).

6. a kind of curve drawing tools as described in claim 1, it is characterised in that: the connecting rod (1) is made of several pipe nipples, The adjacent pipe nipple of every two is connected using suit mode and using shaft.

7. a kind of curve drawing tools as described in claim 1, it is characterised in that: the paintbrush includes pen container (13), in pen Wire spool (14) and pen core (15) are equipped in cylinder (13).