EP1726454B1 - Drafting instrument - Google Patents

Description

The invention relates to a drawing device with a body on which at least one drawing system for a pen or the like for drawing a pattern is formed, and which comprises a movable from a standby position in a contact position adjusting element for fixing the drawing device to a pad.

Drawing device in the above sense is in particular a ruler or a template. The term drawing installation here refers to a contour which is intended to bear a pencil, knife or the like and which predetermines a pattern to be drawn by guiding the pencil, knife or the like, in particular a point, a straight or curved line or a more complex geometric figure. Pad means in particular a sheet of paper or other surface on which the drawing device is applied for attaching the pattern.

In the case of what is known as a circular ruler, an adjusting element in the form of a rotating tip is frequently provided which, when the ruler rests on the base, drills into the base and thereby fixes the ruler to the base around which the ruler is rotatable in this state. Such a circular ruler usually has a number of through holes as a punctiform character attachment for a pen. A pen inserted into one of these through holes is guided on a circular arc path as the circular ruler rotates about the pivot point. From the US 2,438,337 A or the US 5 050 309 A Circular inlets are known in which the rotation tip is movable from a standby position to a contact position.

From the DE 36 07 919 C1 For example, another such drawing device with a rotary-tip device is known. The rotary-tip device comprises a plate with the turning tip, which is held on the flanks of a arranged on the drawing device saddle bow by means of a tongue and groove device and can perform a rocking motion. As a result, the rotation tip can be moved upwards and downwards, ie between a ready position and a puncture or contact position. The rotation tip can be positioned in the contact position directly in front of a drawing edge of the drawing device.

In contrast, in the case of a common ruler or an ordinary stencil, the above-described rotatability with respect to the base is generally undesirable. From the WO 03/066348 A1 such a ruler is known. The ruler or an integrally connected with this rocker are in this case provided with anti-slip means which are deflected by bending the ruler or the rocker from a ready position into a contact position and fix the ruler in the contact position against rotation of the pad.

Out US 1,343,968 A a ruler is known in the body of a rubber strip is admitted so that it does not obstruct a displacement of the ruler on a base in a standby position. The ruler is further provided with a number of slidably guided in the body push buttons, wherein the rubber strip can be deflected by pressing the push buttons in a contact position with the base, in which it rotatably fixes the ruler to the pad.

Out GB 292,378 A a ruler is known, on whose body a plurality of elastically deflectable against the body rockers are integrally formed. Each rocker carries here a spacer, which touches the latter substantially at one point when the ruler is resting on a base. The rockers are now deflectable such that in a rest position of the rocker only the spacers touch the pad, and thus the body is spaced from the pad, while in the deflected position of the rocker both the spacers and the body rest on the pad.

From the documents DE 33 14 344 A1 and DE 34 05 714 A1 Furthermore, drawing rails are known, which are guided linearly displaceable in a groove of a drawing board. The drawing rails are provided with an adjusting element by means of which the drawing rails can be clamped to their fixation on the drawing board in the guide groove.

The invention has for its object to provide a simple-to-produce drawing device of the type mentioned, which is rotatable or rotationally fixed to the pad selectively in the manner of a circular rule.

This object is achieved independently by the features of claim 1.

The drawing device is provided with at least two adjusting elements, of which at least one adjusting element is designed as a turning point. A significantly simplified production is achieved according to the invention by the or each adjusting element is provided on a rocker which is integrally connected to a body of the drawing device and against this body elastically movable, in particular bendable to move the adjusting element from the ready position to the contact position ,

In accordance with claim 1, in addition to the rotation tip, the drawing device rotationally fixed fixing adjustment on the same rocker is provided. The rotating tip in this case has in comparison to the former adjustment to a greater grandeur, ie occurs more strongly against the surface facing the pad rocker. This ensures that at low deformation of the rocker initially only the rotation tip with the pad engages, so that the drawing device is rotatable in this position. In the case of greater deformation, the second adjusting element (and possibly further adjusting elements) also comes into contact with the base, so that the base now contacts at several points and the drawing device is thus held against rotation therewith.

An adjusting element is then designed for rotationally fixed fixation of the drawing device on the base when it contacts in contact position fixing the pad at at least two spaced contact points or a contact surface. An adjusting element is also designed for the rotationally fixed fixing of the drawing device on the base, if it contacted the base fixing only in one point, if it is ensured by the arrangement of the adjusting element that in contact position at least one further adjusting element is engaged with the base, so that in combination of both adjusting the pad is contacted at least two points.

Such an adjusting element is realized in particular by a plurality of projecting from the rocker tips. According to an advantageous alternative, a slip-resistant contour formed on the rocker, in particular a raised corrugation or the like, is used for the same purpose. According to a further alternative, such an adjusting element in the form of a contact surface applied on the rocker is formed from an elastic slip-resistant material, in particular rubber, sponge rubber, etc. This material is optionally glued to the body, press-fitted or otherwise connected to the body of the drawing instrument.

The or at least one rotating tip of the drawing device according to one of the above-described variants of the invention is expediently arranged in the region of a drawing edge serving as drawing device. This is achieved that the pulling edge is always aligned approximately radially with respect to the axis of rotation defined by the rotation tip. This makes it particularly easy and precise radial straight line and angle draw in the pivoting process. The alignment of the rotary tip with the pulling edge is preferably achieved in that the rotary tip is integrally formed on a free end of the rocker aligned with the pulling edge. This free end of the rocker is aligned in particular with a serving as a drawing edge outer edge of the drawing device. However, it is also possible to position the rotation tip within the body surface of the drawing device and to implement a drawing edge aligned with respect to this rotation tip through an elongate slot within the drawing device.

In order to enable a simple drawing of circular arc lines, the drawing device is expediently provided with at least one arranged at a predetermined distance from the rotary tip through hole as a punctiform character attachment for a pencil.

The or each rocker is expediently formed by a region of the body which is cut free of the remaining body material on at least two edges of the rocker. The rocker thus forms a one-sided or two-sided connected to the body strap. In addition to a particularly simple manufacturability this design of the rocker also allows easy handling of the drawing device, especially since the rocker thus formed by simple pressure of a control finger on the drawing device, as he has to be applied anyway to operate the drawing device, so that the adjusting element moved into the contact position and the drawing device is fixed to the pad. To further simplify the handling, a handle, knob or an actuating recess for the operating finger is formed on the upper side of the rocker remote from the adjusting element.

The or at least one rocker is cut free in an expedient variant by two spaced-apart, in particular parallel slots. To the adjustment as close as possible to serving as a pull edge outer edge approach the drawing device, these slots extend suitably to this outer edge, ie, open at the outer edge. The adjusting element associated with this rocker is in this case arranged in particular at the free end of the rocker and thus aligned with the outer edge. Nevertheless, in order to be able to draw a continuous line along this outer edge, which is interrupted by the slits, by means of a crayon, the slit width in the region of the outer edge is reduced to a minimum width just enabling the free movement of the rocker.

In order to allow easy deformability of the rocker relative to the body material, the rocker preferably has a reduced material thickness compared to the rest of the body.

A special manufacturing simplification is achieved in a preferred embodiment in that the adjusting element is integrally formed on the rocker. In particular, it is provided to produce the drawing device with rocker and adjusting element as a simple plastic injection molded part. Alternatively, the adjusting element is designed as a separate, attached to the rocker part.

Fig. 1

in schematischer Draufsicht ein als Dreiecklineal ausgebildetes Zeichengerät mit einer an einer Wippe ausgebildeten Drehspitze als Justierelement und einer zweiten Wippe mit einem zweiten wiederum als Drehspitze ausgebildeten Justierelement,

Fig. 2

in schematischer perspektivischer Darstellung einen Ausschnitt II des Zeichengeräts gemäß Fig. 1,

Fig. 3

in Darstellung gemäß Fig. 1 eine alternative Ausführung des Zeichengeräts als gerades Lineal mit zwei voneinander unabhängig zu betätigenden, jeweils als Drehspitze ausgebildeten Justierelementen,

Fig. 4

in Darstellung gemäß Fig. 1 eine Variante des Zeichengeräts gemäß Fig. 3 mit einer Wippe und einem daran angebrachten Kontaktstreifen aus elastischem rutschhemmenden Material als erstem Justierelement sowie einer Drehspitze als weiterem Justierelement,

Fig. 5

in einem ausschnitthaften Längsschnitt V-V das Zeichengerät gemäß Fig. 4,

Fig. 6

in Darstellung gemäß Fig. 1 eine weitere Variante des Zeichengeräts gemäß Fig. 4,

Fig. 7

in Darstellung gemäß Fig. 5 das Zeichengerät gemäß Fig. 6,

Fig. 8

in Darstellung gemäß Fig. 1 eine Variante des dortigen Zeichengeräts und

Fig. 9

in einem schematischen Längsschnitt IX-IX ausschnitthaft das Zeichengerät gemäß Fig. 8.

Hereinafter, embodiments of the invention will be described with reference to a drawing. Show:

Fig. 1

in a schematic plan view designed as a triangular ruler drawing device with a rotary tip formed on a rocker as an adjusting element and a second rocker with a second in turn formed as a rotary tip adjustment,

Fig. 2

in a schematic perspective view of a section II of the drawing device according to Fig. 1 .

Fig. 3

in illustration according to Fig. 1 an alternative embodiment of the drawing device as a straight ruler with two independently operable, each designed as a turning tip adjustment,

Fig. 4

in illustration according to Fig. 1 a variant of the drawing device according to Fig. 3 with a rocker and a contact strip of elastic slip-resistant material attached thereto as the first adjusting element and a rotary tip as a further adjusting element,

Fig. 5

in a fragmentary longitudinal section VV according to the drawing device Fig. 4 .

Fig. 6

in illustration according to Fig. 1 a further variant of the drawing device according to Fig. 4 .

Fig. 7

in illustration according to Fig. 5 the drawing device according to Fig. 6 .

Fig. 8

in illustration according to Fig. 1 a variant of the local drawing device and

Fig. 9

in a schematic longitudinal section IX-IX detail the drawing device according to Fig. 8 ,

Corresponding parts are always provided in all figures with the same reference numerals.

The Fig. 1 and 2 2. In relation to the hypotenuse of the triangle serving as drawing facility or drawing edge 3 for a pencil, a rocker 4 is arranged which, at its free end 5 aligned with the drawing edge 3, has an adjusting element in FIG Shape of a rotating tip 6 is provided.

The rocker 4 is formed from a region of the body 2, which is cut free by two parallel slots 7 of the body material. The slots 7 extend from the drawing edge 3 and extend with respect to this pulling edge 3 perpendicular to the interior of the body 2 inside. The rocker 4 is in this way at one of the drawing edge 3 remote from the inner edge 8 integral with the body 2, at the three other side edges but free, so that the rocker relative to the body 2 is substantially elastically bendable about the inner edge 8.

The slots 7 extend, as in particular in Fig. 2 can be seen, inside the body surface with substantially the same width b. In a region adjoining the drawing edge 3, the slots 7 deviate therefrom to a reduced clear width b 'narrowed. The width b 'is dimensioned such that a jamming or tilting of the rocker 4 when bending the same and a rubbing together the slits 7 bounding free-cutting edges is just reliably avoided, but on the other hand along the drawing edge 3 on the rocker 4 away a straight, trouble-free Line can be drawn.

The rocker 4 has, as out Fig. 2 it can be seen, a reduced material thickness compared to the body 2. On the other hand, a shoulder 10 is formed in this way between an underside 9 of the drawing implement 1 intended to rest on a base, in the region of the rocker 4, in which the rotary tip 6 protrudes. The grandeur or projecting height of the rotating tip 6 is in this case dimensioned such that the rotation tip is withdrawn with unloaded rocker 4 relative to the bottom 9 and thus not touched when the drawing device 1 on a pad (or only without pressure applied to the pad). In this so-called ready position, the drawing device 1 can thus be easily moved on the pad.

By applying pressure to the rocker 4 from one of the bottom 9 opposite top 11 of the drawing device 1, the rocker 4 is bent from the rest position and thus spent the rotary tip 6 from the standby position in a contact position in which the rotary tip 6 drills into the pad and the Drawing device 1 so punctiform fixed to the pad. By this point fixation, the rotary tip 6 defines a pivot point or a rotation axis about which the drawing device 1 can now be rotated relative to the base, in particular circular arcs, circles and radial lines with respect to the To draw the axis of rotation. For drawing circles and circular arcs, the drawing device 1 has a number of arranged at different distances from the rotary tip 6 through holes 12, in each of which a pen can be inserted and thus serve as a punctiform character investment for the pen. By the rotation tip 6 is aligned approximately in alignment with the pulling edge 3, it is further ensured that the pulling edge 3 is always aligned radially with respect to the axis of rotation, so that over the drawing edge 3 radial straight line or angle straight lines can be drawn.

By arranging the through-holes 12 along the drawing edge 3, in particular circles with a practically arbitrary radius could be drawn with one and the same drawing implement 1 around the piercing point of the rotating tip 6 forming the center of the circle. It can unilaterally or both sides of a provided on the drawing edge 3 zero or reference point at which the rotary tip 6 pierces in the lower position, insertion holes 12 may be provided for odd or even radii.

As an attachment for a control finger, the upper surface 11 facing surface of the rocker 4 is provided with an approximately circular actuating recess 13, which may also be provided with ribs, which improve the skid resistance between the operating finger and the operating trough 13.

When releasing the finger pressure, the rocker 4 pivots automatically and resiliently back into the illustrated ready position.

By suitable choice of the device material, preferably plastic, by dimensioning the material thickness of the running as an integral part of the drawing device 1 rocker 4, by suitable arrangement of the slots 7 and / or by dimensioning the clear widths b, b 'of these slots 7 can in a simple way and Way to be applied or determined by depressing the force required to depress the rocker 4 and thus for insertion of the rotary tip 6 in the pad required force. The required force is lower, the thinner the rocker 4 is. In addition, by the particular thickness of the rocker 4 and the projecting height of the rotary tip 6 given or set.

The rocker 4, which is embodied as an integral part of the drawing device 1 and has a rotary tip 6 integrally formed thereon, can be produced in an injection-molding process in a particularly simple manner in the production of the drawing device 1. Through this one-piece design of the drawing device 1 with elastically movable rocker 3 and integrally formed rotary tip 6 a subsequent, time-consuming assembly of a consisting of several parts drawing device 1 is avoided with rotary tip device.

In addition to the rocker 4 described above, the drawing device 1 comprises a second rocker 4 'arranged approximately centrally with respect to the body 2. The rocker 4 'is cut free by a three-sided surrounded slot 7 in the manner of a tab from the material of the body 2 and connected via the fourth side of the rocker 4' delimiting inner edge 8 in one piece with the body 2. The rocker 4 'is like the rocker 4 substantially elastically deflected by the inner edge 8 by finger pressure on the actuating recess 13. The rocker 4 'is in turn provided on the bottom 9 with a rotating tip 6'.

A handling advantage of the double rocker 4 and 4 'is that the drawing device 1 about each of the rotary tips 6 and 6' is rotatable, provided that the associated rocker 4,4 'is operated individually, but that the drawing device 1 on the other hand also rotatably can be fixed on the pad by both rockers 4,4 'are operated simultaneously and thus both rotary tips 6,6' come into engagement with the pad.

In an in Fig. 3 shown alternative embodiment, the drawing device 1 is formed as a straight ruler. In this embodiment, the drawing device 1 again comprises two independently operable rockers 4, 4 ', which are arranged approximately centrally with respect to the body 2. Each rocker 4 or 4 'is (as in the above example, the rocker 4') surrounded by a three-sided Slot 7 cut free. The inner edges 8, via which the respective rocker 4 or 4 'is integrally connected to the body 2, are facing each other.

In addition to the drawing machines for drawing arcuate through-holes 12, the drawing apparatus 1 is shown in FIG Fig. 3 provided with an elongated slot or slot 14. The elongated hole 14 is aligned with respect to its longitudinal extent on the rotary tips 6 of the two rockers 4 and serves as a drawing edge for drawing a radial straight line.

A variant of the above-described drawing device 1 is in the 4 and 5 shown. In this embodiment of the drawing device 1, only one with respect to the body 2 centrally arranged rocker 4 is provided, which is cut free by two parallel slots 7 such that the rocker 4 is integrally connected at two opposite longitudinal edges 15 with the body 2. As an adjusting element is on the underside 9 facing surface of the rocker 4, a contact strip 16 made of a slip-resistant elastic material, in particular rubber or sponge rubber, glued. The contact strip 16 is again dimensioned in terms of its material thickness such that it in the ready position according to Fig. 5 is completely withdrawn in paragraph 10 and thus does not touch the latter when the drawing device 1 on the pad.

By applying pressure to the actuating recess 13, the rocker 4 is bent in the direction of the bottom 9, so that the contact strip 60 surface contact with the substrate and the drawing device 1 hereby non-slip and rotationally fixed to the pad.

In addition to the contact strip 16, the rocker 4 in this embodiment carries a centrally arranged rotary tip 6 as a further adjusting element. The rotary tip 6 is in this case raised designed as the contact strip 16, so protrudes in the direction of the bottom 9 on the latter. This has the consequence that with slight pressure on the actuating trough 13 and accordingly only slight deformation of the rocker 4, only the turning tip 6 contacted the pad and the drawing device 1 is accordingly rotatable on the base. If the pressure on the actuating recess 13, however, increases, so comes with increasing deflection of the rocker 4 and the contact strip 16 into engagement with the pad and fixes the drawing device 1 now rotatably on the pad. This process is reversible with decreasing pressure on the Betätigungsmulde13, so that the drawing device 1, depending on the finger pressure on the substrate shifted and rotated, only rotated or fixed against rotation can be.

Another variant of the drawing device 1 with the same functionality is in the 6 and 7 shown. In this embodiment, the rotating tip 6 is part of an approximately mushroom-shaped actuating member 17 made of non-slip elastic material, in particular rubber or sponge rubber. The actuating member 17 rests with a flat actuating knob 18 on the surface 11 of the rocker 4 facing the upper side 11. The actuating member 17 is pressed with a handle-shaped projection 19 in a centrally inserted into the rocker 4 implementation 20 and held captive by undercut in this. The free end of the extension 19 protrudes beyond the passage 20 into the shoulder 10 and thereby forms the turning tip 6.

Instead of the contact strip 16 are in the embodiment according to Fig. 6 provided as a further, less elevated adjusting element four tips 21 which are symmetrically formed around the central passage 20 around to the underside 9 facing surface of the rocker 4. An advantage of the rotary tip 6 formed by the actuating part 17 is that it gives way with increasing deformation of the rocker 4 due to the deformability of the actuating member 17 and thereby in particular does not damage the pad. If a damage to the same by the tips 21 are avoided in a sensitive pad, so instead of the tips 21 and the contact strip 16 may be provided.

The actuating member 17 may be rotatably fixed in the rocker 4, so that upon rotation of the drawing device 1 to the rotary tip 6, the actuating member 17 opposite the pad rests and thus forms a material axis of rotation for the body 2. In this embodiment, the "turning tip" 6 formed by the free end of the extension 19 is preferably widened to a broad contact surface in order to reliably prevent a lateral slippage of the body 2 during its rotation.

At one in the 8 and 9 shown variant of the drawing device 1 according to Fig. 1 is the turning tip 6 in turn formed as part of the actuating part 17. This is pushed by a central slot 22 on the rocker 4 and clamped in the slot 22. The rocker 4 'contains, as an adjusting element, another rotary tip 6', again formed as part of an actuating element 17. The associated actuator 17 is (analogous to Fig. 7 ) in a corresponding receptacle of the rocker 4 'inserted.

In the Fig. 1 to 9 shown variants of the rocker 4 or 4 ', the adjusting elements 6,6', 16,21 and drawing systems 3,12,14 and the number of rockers 4,4 'and provided for each rocker 4 adjusting elements 6,6', 16, 21 are arbitrarily combinable on a drawing device 1 of any shape.

LIST OF REFERENCE NUMBERS

1

A plotter

2

body

3

drawing edge

4,4 '

seesaw

5

free end

6.6 '

rotating tip

7

slots

8th

inner edge

9

bottom

10

paragraph

11

top

12

Through holes

13

actuating depression

14

Long hole

15

longitudinal edge

16

Contact strips

17

actuating member

18

actuating button

19

extension

20

execution

21

top

22

slot

b, b '

width

Claims (12)

1. Drafting instrument (1) having an element (2), on which at least one drafting assembly (3, 12, 14) is formed for drafting a pattern, having a first adjusting element (16, 21) which can be moved out of a standby position into a contact position for fixing the drafting instrument (1) in a rotationally secured manner on an underlying surface, the adjusting element (16, 21) being attached to a rocker (4) which is integrally formed with the element (2) and can be deflected elastically with respect to the element (2), characterized in that the first adjusting element (16, 21) is of less elevated configuration than a rotary spike (6) which is provided as a further adjusting element on the same rocker (4), with the result that optionally only the rotary spike (6) or both adjusting elements (6, 16, 21) can be moved into the contact position by a deflection of the rocker (4) to a different extent.
2. Drafting instrument according to Claim 1, characterized in that the first adjusting element comprises a plurality of spikes (21) which are arranged on the same rocker (4).
3. Drafting instrument according to Claim 1 or 2, characterized in that the first adjusting element comprises an anti-slip contour which is formed integrally on the rocker (4).
4. Drafting instrument (1) according to one of Claims 1 to 3, characterized in that the first adjusting element (16) comprises an elastic and anti-slip material which forms a contact face.
5. Drafting instrument (1) according to one of Claims 1 to 4, characterized in that at least one of the adjusting elements (6, 6', 16, 21) is formed integrally on the rocker (4, 4').
6. Drafting instrument (1) according to one of Claims 1 to 5, characterized in that the rotary spike (6, 6') or at least one of the rotary spikes (6, 6') is arranged in the region of a pulling edge (3) which serves as drafting assembly.
7. Drafting instrument (1) according to Claim 6, characterized in that the rotary spike (6) or at least one of the rotary spikes (6) is formed integrally on a free end (5) of the rocker (4), which free end (5) is aligned with the pulling edge (3).
8. Drafting instrument (1) according to one of Claims 1 to 7, characterized by at least one through hole (12) which is arranged at a spacing from the rotary spike (6, 6') or at least one of the rotary spikes (6, 6'), as punctiform drafting assembly for drafting an arcuate line during the rotation of the drafting instrument (1) about the rotary spike (6, 6').
9. Drafting instrument (1) according to one of Claims 1 to 8, characterized in that the or at least one rocker (4, 4') is formed by a region of the element (2), which region is cut free at at least two edges by slots (7).
10. Drafting instrument (1) according to Claim 9, characterized in that the or at least one rocker (4, 4') is formed by two slots (7) which are spaced apart from one another.
11. Drafting instrument (1) according to Claim 10, characterized in that the slots (7) extend as far as a pulling edge (3) which serves as drafting assembly, the free inside width (b, b') of the slots (7) being reduced, in the region of the pulling edge (3), to a minimum width which permits the free mobility of the rocker (4).
12. Drafting instrument (1) according to one of Claims 1 to 11, characterized in that the rocker (4, 4') has a reduced material thickness in comparison with the element (2).

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