EP2679400A1 - Zeichenzirkel mit gesicherter trockener Spitze - Google Patents

Zeichenzirkel mit gesicherter trockener Spitze Download PDF

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Publication number
EP2679400A1
EP2679400A1 EP13170319.1A EP13170319A EP2679400A1 EP 2679400 A1 EP2679400 A1 EP 2679400A1 EP 13170319 A EP13170319 A EP 13170319A EP 2679400 A1 EP2679400 A1 EP 2679400A1
Authority
EP
European Patent Office
Prior art keywords
compass
dry
protective cover
branch
tip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13170319.1A
Other languages
English (en)
French (fr)
Inventor
François Aznar
Maxime Coubronne
François Dufournet
Emmanuel Jacquet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAPED SAS
Original Assignee
MAPED SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAPED SAS filed Critical MAPED SAS
Publication of EP2679400A1 publication Critical patent/EP2679400A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00—Circular curve-drawing or like instruments
    • B43L9/02—Compasses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00—Circular curve-drawing or like instruments
    • B43L9/16—Features common to compasses, dividers, and callipers

Definitions

  • the present invention relates generally to the technical field of drawing and drawing articles. More particularly, this invention relates to drawing compasses and, more specifically, to a drawing compass provided with a secure dry tip.
  • the drawing compasses for school or professional use, usually comprise two branches which are connected to one another in an articulated manner, in the upper part of the compass, by a clevis provided with a gripping part, allowing the user to manually enter the compass and rotate it for tracing a circle.
  • a branch of the compass carries, at its end remote from the yoke, a tracing member such as a pencil lead or an ink line wrench.
  • the other branch of the compass carries, at its far end of the screed, a metal dry point intended to be planted in a sheet of paper on which the circle must be drawn, in order to materialize the center of this circle and to constitute the point rotation of the compass.
  • One of the conditions for success in drawing a circle is to have a dry point well tapered at its end, to ensure a good plant in the leaf, the tip of the dry point must also be sufficiently superior to the branch to allow good visibility during initial pointing operations and tracing.
  • a first solution, applied to drawing learning compasses or geometry, consists in providing dry points widened and reduced in length, so less tapered, which makes them less aggressive.
  • This solution partially answers the security problems, because of the widening of the tip, but it leads to a degradation of the conditions of use of the compasses: the pointing is less effective and consequently the holding of the dry point in the sheet is less good when tracing a circle.
  • the partial improvement of the safety is thus obtained here to the detriment of the convenience in the normal use of the compass, which is a contradictory result in particular during the apprenticeship, during which the child needs the best behavior compass because of the child's lack of ability to draw a circle.
  • a second solution disclosed by the German utility model DE 20 2010 004 956 U1 in the name of the Applicant, consists in fixing the dry point on a support said accessory holder, itself pivotally mounted about an axis located at the end of the corresponding branch of the compass, which is in particular a threaded shaft carrying a knurled nut clamping.
  • This articulated assembly allows, by unscrewing and then tightening the tightening nut, to move the accessory holder and the dry tip between an extended position of use, in the extension of the branch, and a folded storage position along a portion of this branch, preferably within a recess of the branch.
  • the dry tip can be retracted in a folded safety position, which partially solves the problem here, avoiding widening the tip dry.
  • the accessory holder must be held without mechanical play on the branch, in the deployed position, which imposes a significant tightening of the nut on the threaded shaft and does not solve the question of the aggressive use of the compass in the manner of a pungent weapon. Added to this is the fact that nothing obliges the user to fold the accessory holder with its dry point, during the time of non-use and storage of the compass.
  • a third solution consists in making the mobile and retractable dry tip in the end of the corresponding compass branch, by simply sliding the dry point longitudinally, which makes any pivoting accessory holder superfluous.
  • the sliding-mounted dry tip may be biased by a spring towards its retracted position of non-use, and be immobilized in translation by various stop means in its deployed use position, a pusher or slider being in this position. necessary to move the dry point from its retracted position to its deployed position, against the action of the spring - see eg patent documents CN 2654370 U and CN 201665091 U .
  • the fact that the dry tip is thus retractable does not mean that the tip is necessarily retracted by the user, as soon as the compass is no longer used and in particular when the compass is stored.
  • a fourth known solution is to maintain the dry point in a fixed position on the end of the corresponding compass leg, and to provide on this branch a protective cover movable in rotation or translation, between a position of release of the dry tip for the use of the compass, and a position of recovery and protection of this point when the compass is not used.
  • a protective cover movable in rotation or translation between a position of release of the dry tip for the use of the compass, and a position of recovery and protection of this point when the compass is not used.
  • the present invention aims to eliminate the disadvantages of the state of the art, previously exposed, retaining the principle and advantages of a retractable mobile dry tip or a movable protective cover associated with a fixed dry tip. It is therefore intended to provide a compass equipped with a secure dry tip which, while being simple in structure, provides permanent and certain safety in the position of non-use, and good visibility of the dry tip in the position of use.
  • the subject of the invention is a drawing compass with secure dry tip, the compass comprising two branches which are connected to one another in an articulated manner by a first end and which are respectively provided with another end, a tracing member and a dry tip, the dry tip being designed as a movable member, slidably mounted at the end of the corresponding branch so as to be retracted into said end, or the dry tip being fixed and secured by a movable member shaped as a protective cover, movable on the corresponding compass leg between a position of clearance of the dry point for the use of the compass and a covering position and protection of this tip when the compass is not used, this compass being essentially characterized by the fact that it comprises complementary means, provided on the one hand on the mobile element constituting é by the retractable dry tip or the protective cover, and secondly on the branch provided with the tracing member, these means cooperating during the bringing together of the two branches to move and maintain said movable member in a
  • the movable element which may be the dry point itself or a protective cover of this point is "automatically" displaced, along the compass branch that supports it, to a so-called safety position, in which the dry point will no longer be accessible.
  • the user will not risk getting stung by taking the compass.
  • the user will not prick at the time of retraction of the dry tip or the establishment of the protective cover, since this action will be done automatically, without direct manipulation of the dry tip or protective cover with the fingers.
  • the dry tip is mounted to move in translation at the end of the corresponding compass leg and is biased towards its retracted position in said end by a compression or traction spring, while that locking means are provided for temporarily holding the dry tip in the extended position on the corresponding compass leg, the spring then being maintained in the compressed or tensioned state;
  • the branch provided with the tracing member comprises a locking finger which, when bringing the two branches together, cooperates with the dry point or with a support of this point to deactivate the locking means and release the dry point , so as to allow the spring to return this tip in its retracted position.
  • said locking means comprise a lug formed on the support of the dry point and engageable in a hole in the corresponding branch, or cooperating with a retaining catch formed on this branch, while the finger release, carried by the other branch, comprises a chamfer or a ramp which, when the two branches come together, cooperates with the support of the dry point so as to move it transversely, then releasing the pin of the hole or the notch hold.
  • the spring relaxes and moves in translation the support of the dry tip, so the dry tip itself, until its stop on a stop disposed in the corrsspondant branch, this stopping position being a position in which the dry point is completely retracted into the branch, thus perfectly protected.
  • a button or the like fixed on the dry point or on its support makes it possible to extract the dry point by a voluntary manual action, while retaining the spring, at the moment when the compass must be reused, the position wholly out of the dry point being determined by the previously defined locking means.
  • the spring which recalls the dry point in the retracted position is advantageously a helical coil spring, housed and stretched within the corresponding branch between the dry point or its support and the area of the articulation of the two branches.
  • the available length of the branch concerned is thus judiciously used to house this spring.
  • the protective cover is mounted movably in translation on the corresponding compass leg, and is biased by a spring pushing the protective cover towards its covering position and protection of the dry tip, while that means are provided for the temporary retention of the protective cover on the corresponding compass leg in its position of disengagement of the dry point, maintaining the spring in the compressed or tensioned state;
  • the compass leg provided with the tracing member comprises at least one stop cooperating with a portion of the protective cover to release the protective cover from its position of release of the dry point, when bringing the two branches together.
  • the abutment of the compass arm provided with the tracing member is also provided to cooperate with a portion of the protective cover in order to maintain this protective cover in covering position and protection of the dry tip.
  • the same stop thus fulfills a dual function.
  • the means for the temporary retention of the protective cover on the corresponding compass branch, in its position of release of the dry point are constituted by a hole provided on the protective cover and cooperating with a pin of the corresponding compass branch.
  • the protective cover advantageously has a transverse mobility relative to the corresponding compass branch, this additional mobility allowing the attachment of said cover on the aforementioned pin in the position of release of the dry point, but also its release relative to said lug, under the action of the abutment of the compass arm provided with the tracing member, when the two branches are brought together.
  • the stop may be a lateral boss of the branch provided with the tracing member, while the part cooperating with this stop is a side tab of the protective cover, directed towards the compass arm provided with the tracing member.
  • the protective cover has a section "U”, with two parallel wings taking place on either side of the corresponding compass leg, each wing being provided, towards its end farthest from the dry point, a lateral tab cooperating with the abutment of the branch provided with the tracing member.
  • the compass designated as a whole by the reference numeral 1 has two branches 2 and 3 interconnected, in an articulated manner, by a hinge 4 resulting here from a single axis, passing through the joined ends of two branches 2 and 3.
  • a branch 2 of the compass 1 is provided at its end remote from the hinge 4, a tracing member such as a pencil lead 5 graphite.
  • the other leg 3 of the compass 1 is provided at its end remote from the articulation 4, a dry point 6 metal.
  • the dry tip 6 is secured to a support block 7, mounted to slide longitudinally in a longitudinal recess 8 of the corresponding branch 3.
  • the dry tip 6 is thus movable between a use-out position, protruding beyond the end of the branch 3 (see Figures 1 to 3 ), and a so-called safety position, retracted inside the branch 3 (see Figures 9 and 10 ).
  • the support block 7 laterally carries an actuating button 11, which passes through a longitudinal lumen of the branch 3 so as to be accessible from the outside for its handling.
  • the support block 7 also has, laterally, a lug 12 with a ramp designed to cooperate with a retaining catch 13, also with ramp, formed on the branch 3 and advancing in the longitudinal recess 8 of this branch 3.
  • the other branch 2 of the compass that is to say the branch provided with the pencil lead 5, comprises at an intermediate point of its length an unlocking finger 14, which protrudes towards the branch 3 provided with the tip 6.
  • the unlocking finger 14 comprises a chamfer or a ramp 15, clearly visible on the figure 8 located opposite the support block 7 of the dry point 6.
  • the tension spring 9 tends to return the support block 7, with the dry point 6, in the retracted position, even when the two branches 2 and 3 are spaced from one another.
  • the user opens the compass 1 by moving its two branches 2 and 3 apart, and it acts on the actuating button 11 so as to move the block support 7 of the articulation 4, by tending more the tension spring 9.
  • the lug 12 of the support block 7 passes the notch 13 to finally be retained under this notch 13 (see figure 4 ), which determines the output position of the dry point 6.
  • the compass 1 can then be used, in a usual manner, for the tracing of circles.
  • the user closes the compass 1 by bringing its two branches 2 and 3 closer to each other, until the two branches 2 and 3 come into contact with each other practically. other.
  • the unlocking finger 14 carried by the arm 2 then cooperates, by its chamfer or its ramp 15, with the support block 7 so as to move the latter laterally, inside the recess 8. This lateral movement clears the lug 12 of the retaining catch 13, so that the support block 7 will be released - see Figures 5 to 8 .
  • the traction spring 9 intervenes to pull the support block 7 released in the direction of the articulation 4, until a stop position that can be given by stopping the actuating button 11 at the end of the light.
  • the dry point 6 is then retracted into the end of the corresponding branch 3 - see figure 10 .
  • the dry tip 6 remains thus retracted into the branch 3 and fully protected, until a next voluntary manual action to take it out, for reuse of the compass.
  • the compass still designated as a whole by the reference numeral 1 has two branches 2 and 3 connected in an articulated manner, here by a yoke 4, the branch 2 being provided with a tracing member such that pencil lead 5, while the other branch 3 is provided with a dry point 6.
  • the dry point 6 is fixedly mounted here, for example by depression, at the end of the corresponding branch 3 which is remote from the yoke 4.
  • This branch 3 of the compass 1 still receives a cache protector 16, mounted movably relative to the branch 3 between a retracted position of clearance of the dry point 6 ( Figures 11 to 13 ), allowing the use of the compass 1, and an advanced position of covering and protection of the dry point 6 ( Figures 17 to 19 ), which position is occupied when compass 1 is not used.
  • the protective cover 16 has a section "U”, with two parallel wings 17 and 18 which take place on either side of the corresponding branch 3, and with an intermediate face 19 which connects the two wings 17 and 18.
  • each wing 17 or 18 of the protective cover 16 is provided an oblong opening 20, in which is engaged a pin 21 projecting laterally from the branch 3.
  • the two opposite pins 21 are engaged with a certain clearance in the corresponding oblong openings 20, such that the protective cover 16 has, in relation to the branch 3, not only a longitudinal mobility but also a certain transverse mobility.
  • Each wing 17 or 18 of the protective cover 16 is provided towards its upper end, in other words the end furthest from the tip 6 and the closest to the yoke 4, a side lug 23 directed towards the branch 2.
  • the branch 2 provided with the pencil lead 5 comprises two stops 24, made in the form of oblong bosses, which are located on this branch 2 at the height of the two lateral lugs 23 of the protective cover 16 located in the retracted position of release of the dry point 6, so as to cooperate respectively with these two lateral lugs 23.
  • a hole 25 is formed in the intermediate face 19 of the protective cover 16.
  • the hole 25 cooperates with a lug 26 formed on the outer face of the branch 3, the lug 26 having an inclined ramp.
  • the protective cover 16 is placed in the retracted position of release of the dry point 6, on the corresponding branch 3.
  • the protective cover 16 is held in this retracted position by the engagement of the lug 26 in the hole 25 of the intermediate face 19 of the protective cover 16.
  • the compression spring 22 is thus compressed to the maximum.
  • the compass 1, whose dry point 6 is thus well released, can then be used in a usual way, for the tracing of circles - see Figures 11, 12 and 13 .
  • the user closes the compass 1 by bringing its two branches 2 and 3 closer to each other, until the two branches 2 and 3 come into contact with each other practically. other.
  • the stops 24 of the branch 2 bear on the ends of the lateral lugs 23 of the protective cover 16, exerting on these lateral lugs 23 a thrust transverse to the direction of the branch 3 - see Figures 14, 15 and 16 .
  • This thrust moves the entire protective cover 16 transversely to the branch 3, thanks to the clearance allowing transverse mobility, which releases the protective cover 16 of the lug 26 of the branch 3.
  • the protective cover 16 is immediately rejected by the relaxation of the compression spring 22, previously compressed, so that the protective cover 16 is automatically positioned in the advanced position of covering and protection of the dry tip 6 - see Figures 17, 18 and 19 .
  • the user To use the compass 1 again, the user must first open it by removing the two branches 2 and 3 from each other. The stops 24 are thus moved away from the lateral lugs 23 so that these stops 24 no longer cause the protective cover 16 to recoil. The latter can then be moved manually to its most retracted position, defined by the engagement of its hole. 25 on the spur 26 (see figure 13 ), this displacement being accompanied by a stronger compression of the spring 22.

Landscapes

  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
EP13170319.1A 2012-06-28 2013-06-03 Zeichenzirkel mit gesicherter trockener Spitze Withdrawn EP2679400A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1256158A FR2992582B1 (fr) 2012-06-28 2012-06-28 Compas de dessin avec pointe seche securisee

Publications (1)

Publication Number Publication Date
EP2679400A1 true EP2679400A1 (de) 2014-01-01

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Family Applications (1)

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EP13170319.1A Withdrawn EP2679400A1 (de) 2012-06-28 2013-06-03 Zeichenzirkel mit gesicherter trockener Spitze

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EP (1) EP2679400A1 (de)
FR (1) FR2992582B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107867108A (zh) * 2016-09-28 2018-04-03 重庆市谷穗电器厂 一种圆规
CN110949041A (zh) * 2019-12-19 2020-04-03 得力集团有限公司 一种带护套的圆规

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE335280C (de) * 1921-03-30 Erich Brauner Verstellbares, als Zirkel verwendbares Schreibgeraet
DE1111983B (de) * 1956-10-05 1961-07-27 Otto Timmermann Als Zirkel verwendbarer Fallminenfuellbleistift
DE9404177U1 (de) * 1994-03-14 1994-05-11 Quadra Produktdesign Gmbh, 67059 Ludwigshafen Schreib- und Zeichengerät
US6276031B1 (en) 1999-12-11 2001-08-21 Tommy Strap, Llc Bungee cord with hookless ends
US6311404B1 (en) 1998-10-30 2001-11-06 Paul A. Smith Retractable safety mechanism and compass and method of using the same
CN2654370Y (zh) 2002-09-27 2004-11-10 李富饶 圆规安全针脚
DE202008016339U1 (de) * 2008-12-10 2010-04-29 Kum Ltd. Zirkelschreibgerät
DE202010004956U1 (de) 2009-04-15 2010-07-08 Maped S.A.S. Zeichenzirkel mit gelenkig montierbaren Zubehör-Trägergliedern
CN201665091U (zh) 2010-01-29 2010-12-08 王通 一种安全圆规

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE335280C (de) * 1921-03-30 Erich Brauner Verstellbares, als Zirkel verwendbares Schreibgeraet
DE1111983B (de) * 1956-10-05 1961-07-27 Otto Timmermann Als Zirkel verwendbarer Fallminenfuellbleistift
DE9404177U1 (de) * 1994-03-14 1994-05-11 Quadra Produktdesign Gmbh, 67059 Ludwigshafen Schreib- und Zeichengerät
US6311404B1 (en) 1998-10-30 2001-11-06 Paul A. Smith Retractable safety mechanism and compass and method of using the same
US6276031B1 (en) 1999-12-11 2001-08-21 Tommy Strap, Llc Bungee cord with hookless ends
CN2654370Y (zh) 2002-09-27 2004-11-10 李富饶 圆规安全针脚
DE202008016339U1 (de) * 2008-12-10 2010-04-29 Kum Ltd. Zirkelschreibgerät
DE202010004956U1 (de) 2009-04-15 2010-07-08 Maped S.A.S. Zeichenzirkel mit gelenkig montierbaren Zubehör-Trägergliedern
CN201665091U (zh) 2010-01-29 2010-12-08 王通 一种安全圆规

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107867108A (zh) * 2016-09-28 2018-04-03 重庆市谷穗电器厂 一种圆规
CN110949041A (zh) * 2019-12-19 2020-04-03 得力集团有限公司 一种带护套的圆规

Also Published As

Publication number Publication date
FR2992582A1 (fr) 2014-01-03
FR2992582B1 (fr) 2014-06-13

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