EP3766648B1 - Couteau de sécurité - Google Patents

Couteau de sécurité Download PDF

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Publication number
EP3766648B1
EP3766648B1 EP20184964.3A EP20184964A EP3766648B1 EP 3766648 B1 EP3766648 B1 EP 3766648B1 EP 20184964 A EP20184964 A EP 20184964A EP 3766648 B1 EP3766648 B1 EP 3766648B1
Authority
EP
European Patent Office
Prior art keywords
blade
slide
coupling element
housing
knife according
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.)
Active
Application number
EP20184964.3A
Other languages
German (de)
English (en)
Other versions
EP3766648A1 (fr
Inventor
Jürgen ZIMMER
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.)
Wolfcraft GmbH
Original Assignee
Wolfcraft GmbH
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 Wolfcraft GmbH filed Critical Wolfcraft GmbH
Publication of EP3766648A1 publication Critical patent/EP3766648A1/fr
Application granted granted Critical
Publication of EP3766648B1 publication Critical patent/EP3766648B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B5/00—Hand knives with one or more detachable blades
    • B26B5/001—Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B5/00—Hand knives with one or more detachable blades
    • B26B5/001—Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use
    • B26B5/003—Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use comprising retraction means for the blade or the blade holder

Definitions

  • the invention relates to a knife for accommodating a replaceable blade, with a housing that has a blade channel for inserting a blade that has a driver recess, with a slide that can be moved along a movement path along the housing from the outside of the housing in order to move the blade from a blade that is inserted in the blade channel To shift storage position in a working position protruding from an opening of the blade channel, which carries a coupling element for coupling the slide to the blade with a driver projection which engages in the driver recess, and with a blade changing button.
  • the DE 20 2008 007 019 U1 describes a knife with a blade carried by a slide, the slide being displaceable by means of a handle in the housing of the knife.
  • a blade change button which has a blocking section projecting into a movement path of the slide, must be actuated in order to bring the slide beyond a working position into a blade change position.
  • the DE 20 2005 016 202 U1 also describes a knife having a slider which carries a blade and which can be moved from a storage position to a working position.
  • a pivoting lever has a blocking section, against which the slider hits in the working position. By pivoting the pivoting lever, the blocking section gets out of the path of movement, so that the slide can be brought into a blade-changing position.
  • a similarly designed knife with a blocking section formed by a pivoting lever describes the DE 20 2011 050 068 U1 .
  • a knife with a side snap is out of the DE 20 2013 101 416 U1 previously known.
  • a knife with a swivel lever is from the DE 202 02 165 U1 previously known.
  • knives with a blade that can be brought from a storage position to a working position by actuating a slider and in which a used blade can be replaced with a new blade are known from US Pat GB 2 213 416 B , CN 105171781A , US 5,581,890A , WO 2016/201532 , DE 21 2011 100 211 U1 , DE 27 36 395 B1 , DE 72 07 013 , EP 3 165 337 A1 , GB 2 428 618 B , CN 206105907 , CN204976674 , DE 19717 830 A1 and GB2 265 104 .
  • a first aspect of the invention relates to the blade change button.
  • This is designed in particular as a push button. It has a blocking section that protrudes into the movement path of the slide.
  • the slide is designed such that it in a final phase in its shift from the Storage position strikes in the working position on the blocking section.
  • the blocking section can be brought out of the movement path of the slide by actuating the blade change button in such a way that the slide can be displaced beyond the previously described working position after the blade change button has been pressed. In this position, the knife assumes a blade changing position.
  • a driver projection is provided, which lies in a driver recess of the blade both in the storage position and in the working position.
  • the blade is tied to a blade carrier by means of this driver projection.
  • the coupling element can be designed as a flexible body. When the slide is moved from the working position to the blade-changing position, the flexible body can bend transversely to the direction of movement of the slide.
  • the flexurally elastic body can be formed by a spring-elastic sheet metal, for example a leaf spring.
  • the coupling element it is also possible for the coupling element to be a rigid body.
  • the rigid body may be pivotally mounted, for example, on a blade carrier or on a coupling element carrier.
  • the coupling element, the control edge or the Forms control of a strip of material, such as a spring tongue such as a spring tongue.
  • the spring tongue is a material-uniform section of the spring-elastic sheet metal.
  • the housing-side control flank can be formed by the projection or the like of the housing, with the housing preferably being formed by two housing halves.
  • the slide sits like a rider on a narrow side of the housing. It can have legs extending over the two broad sides. In its blocking position, the blocking section can lie in the path of movement of one of these legs. If the blade change button, which is preferably also assigned to the broad side of the housing, is actuated against the restoring force of a spring element, the blocking section steps out of the path of movement of the leg of the slide. In particular, it is provided that the blocking section is displaced in the direction into the housing.
  • the spring element can be a reversing gear compression spring. It can be supported on a U-shaped spring holder, which sits inside the housing and is attached with its U-legs to the inside of one of the housing halves.
  • the spring element can be supported on the U-web.
  • the coupling element can be a stamped and bent part.
  • the driver projection can be an angled section of the coupling element.
  • the control element can also be a section that is connected to the coupling element in the same material.
  • the slide forms an actuating section arranged between its legs.
  • a blade carrier can be connected to this operating section. The blade carrier protrudes through a slot in the housing into the blade channel.
  • the housing slot can be provided at the interface between the two housing halves.
  • the blade carrier can form a contact flank on which a broad side of the blade can be supported.
  • the blade bearer can also form a support shoulder on which a rear edge of the blade can be supported.
  • a retaining tongue can also be formed by the blade carrier, on which the cutting edge of the blade can be supported.
  • a spring element can be provided which has a first end which is fastened to the slide or to the blade carrier. A second end of the spring element can be attached to the housing.
  • the spring element is preferably a tension spring which automatically pulls the slide back into the storage position.
  • Latch elements can be provided with which the slide latches in a working position.
  • control flank of the coupling element is U-shaped bent-back metal strip is formed.
  • a restraining section of the coupling element is in an insertion shaft which is formed by a number of ribs which protrude at a small distance over a base surface of a holding flank of the coupling element carrier.
  • the blade change button is to be actuated against the restoring force of a reversing gear pressure spring which is supported on a U-shaped spring holder which is fastened with its U-legs on the inside of the housing.
  • the operation of the device is as follows. In the unactuated state, the spool is held in its retracted position. In this position the blade is in its storage position. If the slider is pushed against the restoring force of the spring element, the blade emerges from the mouth of the blade channel into its working position. The slide can be displaced until it hits the blocking section. In this position, the control is in front of a control bevel or a control rounding of the housing.
  • the blade is tied to the blade carrier by means of the entrainment projection, which enters the entrainment recess of the blade.
  • the coupling element which is designed in particular as a flat body, extends in one plane and lies flat against a holding flank of a coupling element carrier.
  • the knife shown in the drawings has a handle forming a housing.
  • the housing is formed by 2 similarly designed housing halves 1,2.
  • the housing halves 1, 2 can be made of plastic, aluminum, die-cast zinc or another suitable material. With ribs pointing towards one another, they form a blade channel 3 in which a blade 12 can be pushed back and forth.
  • a slide 7 rides on a narrow side of the housing 1, 2.
  • the slide 7 has two parallel legs 9, 9' of different thicknesses, which are connected to one another by an actuating section 9".
  • the actuating section has a depression that is undercut on both sides. This depression forms an insertion shaft 28 for holding sections 29 of a blade carrier 10 and a coupling element carrier 26.
  • the blade carrier 10 has a broad side surface which forms a contact flank 15 on which a broad side surface of a trapezoidal blade 12 can be supported
  • a rear marginal edge 12" of the blade 12 can rest on a support shoulder 22 of the blade carrier 10.
  • the back of a coupling element carrier 26 bears against a back of the blade carrier 10 .
  • the coupling element 4 is a resilient body that can be lifted off the holding flank 21 by a transverse force. In the process, a section of the coupling element 4 that forms a driver projection 5 bends relative to the restrained section 24 in a position. (please refer figure 17 The incisions 27 are level with an upper rib 31 so that the rib can enter the incisions 27 when the coupling element 4 bends, in order to prevent the coupling element 4 from slipping out of the insertion shaft 25 .
  • the blade support assembly has hook portions on its rear side.
  • both the blade carrier 10 and the coupling element carrier 26 each have a hook section.
  • the end of a spring element 18 is attached to this hook section.
  • the spring element 18 is a tension spring.
  • the other end of the spring member 18 is attached to the housing such that a spring force is applied to the blade support assembly. In the embodiment, it is a tensile force that pushes the slide from the figure 7 shown working position in the, in the figure 5 shown custody acted upon.
  • a U-shaped spring retainer 19 is fastened to the housing half 1 on the inside facing the blade channel 3 .
  • the spring holder 19 carries a spring element 20 designed as a compression spring, which acts on a blade change button 16 in the outward direction of the housing.
  • An actuation section of the blade change button 16 protrudes through an opening 32 in the housing shell 1.
  • the blade change button 16 forms a blocking section 17, which emerges from the interior of the housing through an associated opening 33 when the blade change button 16 is in a non-actuated position. It lies in the path of movement of the leg 9 of the slide 7, so that the slide 7 only up to the in the figure 14 shown working position can be shifted.
  • the blocking section 17 steps out of the movement path of the leg 9, so that the leg 9 moves beyond the working position into the in figure 16 blade changing position shown can be brought.
  • the blocking section enters a niche 34 of the leg 9 .
  • the Figures 11 and 12 show a coupling element 4 according to the invention, which forms a control element 6 .
  • the control element 6 forms a control edge 6'.
  • the control element 6 is formed by an elongate strip connected to the coupling element 4 in the same material, which is bent back to form a U in such a way that it is in the figure 14 shown working position in front of a control shoulder 14 is located.
  • the control shoulder 14, which can also be designed as a control curve or as a control slope, forms a leading edge against which the Control edge 6 'of the control 6 can occur. in the in figure 14 In the position shown, touching the control edge 6' of the control shoulder 14 has no functional consequence.
  • a knife which is characterized in that the blade change button 16 has a blocking section 17 which projects into the movement path of the slide 7 and against which the slide 7 strikes in the final phase of its displacement into the working position, and which can be removed from the movement path by actuating the blade change button 16 of the slide 7 can be brought, so that the slide 7 can bring the blade 12 beyond the working position into a blade-changing position, with the driver projection 5 being controlled out of the driver recess.
  • a knife characterized in that the coupling element 4 has a control element 6 which cooperates with a control shoulder 14 of the blade channel when the slide 7 is moved from the working position to the blade-changing position.
  • a knife which is characterized in that the coupling element 4 is a flexible body which bends transversely to the direction of displacement when the slide 7 is moved from the working position to the blade-changing position and is in particular a spring-elastic sheet metal.
  • a knife which is characterized in that the control flank 6' is formed by a spring tongue of the coupling element 4, which in particular is bent back and which strikes the control shoulder 14, in particular the control bevel.
  • a knife which is characterized in that the driver projection 5 and the control element 6 are integrally connected to the coupling element 4 designed as an elastic flat body, it being provided in particular that the control element 6 is a section angled from the flat body.
  • a knife which is characterized in that a blade carrier 10 connected to an actuating section 9′′′ of the slide 7 protrudes through a housing slot into the blade channel 3 and forms a contact flank 15 on which a broad side of the blade 12 can be supported, and/or that a first end of a spring element 18 acts on the blade carrier 10, the second end of which acts on the housing 1, 2, which spring element 18 is in particular a tension spring or a compression spring.
  • a knife that is characterized in that a restraining section 24 of the coupling element 4 that is remote from the driving projection 5 is inserted in an insertion shaft 25 , in particular of a coupling element carrier 26 .
  • List of References 1 case halves 24 bondage section 2 case halves 25 slot 3 blade channel 26

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)

Claims (14)

  1. Couteau, destiné à recevoir une lame (12) interchangeable, pourvu d'un boîtier (1, 2), qui comporte une gorge à lame (3), pour y insérer une lame (12) comportant un évidement d'entraînement (23), pourvu d'un curseur (7) repoussable le long du boîtier (1, 2) à partir de la face extérieure du boîter, le long d'une trajectoire de déplacement, pour déplacer la lame (12) d'une position de rangement insérée dans la gorge à lame (3) dans une position de travail saillant hors d'un orifice de la gorge à lame (3), qui pour accoupler le curseur (7) avec la lame (12) porte un élément de couplage (4) pourvu d'une saillie d'entraînement (5) qui s'engage dans l'évidement d'entraînement (23) et pourvu d'un bouton (16) de changement de lame, placé sur le côté largeur du boîtier (1, 2), qui comporte un segment de blocage (17) saillant dans la trajectoire de déplacement du curseur (7), sur lequel le curseur (7) bute dans la phase finale de son déplacement dans la position de travail, et qui par un actionnement du bouton (16) de changement de lame, est susceptible d'être amené hors de la trajectoire de déplacement du curseur (7), de telle sorte que le curseur (7) puisse amener la lame (12) au-delà de la position de travail jusque dans une position de changement de lame, la saillie d'entraînement (5) étant guidée hors de l'évidement d'entraînement (23), caractérisé en ce que le bouton (16) de changement de lame doit être actionné à l'encontre d'une force de rappel d'un élément à ressort (20), pour permettre le déplacement du curseur (7) dans la position de changement de lame.
  2. Couteau selon la revendication 1, caractérisé en ce que l'élément de couplage (4) est un corps élastique en flexion, qui lors du déplacement du curseur (7) de la position de travail dans la position de changement de lame se courbe à la transversale de la direction de déplacement et qui est notamment une tôle à résilience élastique.
  3. Couteau selon la revendication 1 ou 2, caractérisé en ce que l'élément de couplage (4) constitue un élément de commande (6) pourvu d'un flanc de commande (6'), qui lors du déplacement du curseur (7) de la position de travail dans la position de changement de lame, interagit avec un épaulement de commande (14) de la gorge à lame.
  4. Couteau selon la revendication 3, caractérisé en ce que le flanc de commande (6') est formé d'un ruban métallique en forme de U, recourbé vers l'arrière.
  5. Couteau selon la revendication 3 ou 4, caractérisé en ce qu'un segment d'entrave (24) de l'élément de couplage (4) est inséré dans un compartiment d'insertion (25) qui est constitué de plusieurs nervures (31), qui avec un faible écart saillissent au-dessus d'une surface de base d'un flanc de retenue (21) d'un support (26) d'élément de couplage.
  6. Couteau selon la revendication 1 à 5, caractérisé en ce que l'élément à ressort (20) est un ressort de pression d'inversion (20), qui s'appuie sur un support de ressort (19) en forme de U, qui par les branches de son U est fixé sur la face interne du boîtier (1, 2).
  7. Couteau selon l'une quelconque des revendications 3 à 6 précédentes, caractérisé en ce que lors du déplacement du curseur (7) de la position de travail dans la position de changement de lame, le flanc de commande (6') interagit avec l'épaulement de commande (14) de la gorge à lame.
  8. Couteau selon l'une quelconque des revendications 3 à 7, caractérisé en ce que le flanc de commande (6') est constitué d'une lame à ressort de l'élément de couplage (4), qui est notamment recourbée vers l'arrière et qui touche l'épaulement de commande (14).
  9. Couteau selon l'une quelconque des revendications précédentes, caractérisé en ce que le curseur (7) est emboîté à la manière d'un cavalier sur un côté étroit du boîtier (1, 2) et comporte des branches qui s'étendent sur les deux côtés largeur, dans sa position de blocage, le segment de blocage (17) se situant dans la trajectoire de déplacement de l'une des branches (9, 9').
  10. Couteau selon l'une quelconque des revendications 3 à 9, caractérisé en ce que la saillie d'entraînement (5) et le flanc de commande (6') sont assemblés en une seule matière avec l'élément de couplage (4) conçu sous la forme d'un corps plat élastique, étant notamment prévu que le flanc de commande (6') soit un segment coudé du corps plat.
  11. Couteau selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un porte-lame (10) assemblé avec un segment d'actionnement (9") du curseur (7) saillit à travers une fente du boîtier dans la gorge à lame (3) et constitue un flanc de contact (15), sur lequel peut s'appuyer un côté largeur de la lame (12).
  12. Couteau selon la revendication 11, caractérisé en ce que sur le porte-lame (10) s'accroche une première extrémité d'un élément à ressort (18) dont la deuxième extrémité s'accroche sur le boîtier (1, 2), lequel élément à ressort (18) est notamment un ressort de traction ou un ressort de pression.
  13. Couteau selon l'une quelconque des revendications 11 ou 12, caractérisé en ce qu'au porte-lame-(10) est associé dans l'espace un flanc de retenue (21) placé au vis-à-vis du flanc d'appui (15), sur lequel est fixé l'élément de couplage (4).
  14. Couteau selon l'une quelconque des revendications 3 ou 4, caractérisé en ce qu'un segment d'entrave (24) de l'élément de couplage (4) éloigné de la saillie d'entraînement (5) est inséré dans un compartiment d'insertion (25) notamment d'un support (26) d'élément de couplage.
EP20184964.3A 2019-07-19 2020-07-09 Couteau de sécurité Active EP3766648B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019119612.4A DE102019119612A1 (de) 2019-07-19 2019-07-19 Sicherheitsmesser

Publications (2)

Publication Number Publication Date
EP3766648A1 EP3766648A1 (fr) 2021-01-20
EP3766648B1 true EP3766648B1 (fr) 2023-08-30

Family

ID=71575015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20184964.3A Active EP3766648B1 (fr) 2019-07-19 2020-07-09 Couteau de sécurité

Country Status (3)

Country Link
EP (1) EP3766648B1 (fr)
CN (1) CN214446558U (fr)
DE (1) DE102019119612A1 (fr)

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7207013U (de) 1971-08-30 1972-06-22 Allfix Sas Messer mit regulierbarer vorspringender klinge
DE2736395C2 (de) 1977-08-12 1979-07-12 Martor-Argentax E.H. Beermann Kg, 5650 Solingen Messer mit einer längsverschieblich geführten zugfederbelasteten Messerklingenhalterung
GB2213416B (en) 1987-12-11 1991-12-18 Stanley Works Ltd Blade-carriers for retractable-blade knives
US5301428A (en) 1992-03-10 1994-04-12 The Stanley Works Utility knife
US5581890A (en) 1995-11-06 1996-12-10 Great Neck Saw Manufacturers, Inc. Utility knife
DE19717830A1 (de) 1997-04-26 1998-10-29 Wolfcraft Gmbh Mehrzweckmesser
DE20202165U1 (de) * 2002-02-13 2002-08-01 Chao Chien Chuan Handwerkermesser mit austauschbaren Klingen
US7797836B2 (en) 2005-08-02 2010-09-21 The Stanley Works Compact utility knife
DE202005016202U1 (de) * 2005-10-13 2007-02-22 Martor Kg Messer
US20090277016A1 (en) * 2008-05-07 2009-11-12 Yuewei Wu Utility knife with an auto-retractable blade
DE202008007019U1 (de) * 2008-05-23 2008-10-09 Ningbo Xingwei Plastic Product Co., Ltd. Gebrauchsmesser mit einer sich selbst zurückziehenden Klinge
CN201728662U (zh) * 2010-05-17 2011-02-02 邬岳伟 一种具有伸出长度分级可调刀片的美工刀
GB2505383A (en) 2011-06-22 2014-02-26 Yuewei Wu A retractable telescoping utility knife
CN202825860U (zh) * 2012-07-11 2013-03-27 邬岳伟 一种美工刀
BR112017026981A2 (pt) 2015-06-17 2018-09-04 Starrett Ind E Comercio Ltda aperfeiçoamentos introduzidos em estilete compacto de segurança
CN105171781A (zh) 2015-09-23 2015-12-23 浙江兴达文具有限公司 一种美工刀
CN204976674U (zh) 2015-09-23 2016-01-20 浙江兴达文具有限公司 一种美工刀
US10252428B2 (en) 2015-11-05 2019-04-09 Stanley Black & Decker, Inc. Utility knife with skewed pivotal blade lock
CN206105907U (zh) 2016-08-30 2017-04-19 浙江兴达文具有限公司 一种美工刀

Also Published As

Publication number Publication date
CN214446558U (zh) 2021-10-22
EP3766648A1 (fr) 2021-01-20
DE102019119612A1 (de) 2021-01-21

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