EP3698928B1 - Couteau pourvu de dispositif de lame - Google Patents

Couteau pourvu de dispositif de lame Download PDF

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Publication number
EP3698928B1
EP3698928B1 EP20158515.5A EP20158515A EP3698928B1 EP 3698928 B1 EP3698928 B1 EP 3698928B1 EP 20158515 A EP20158515 A EP 20158515A EP 3698928 B1 EP3698928 B1 EP 3698928B1
Authority
EP
European Patent Office
Prior art keywords
blade
knife according
bolt
form fitting
projection
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
EP20158515.5A
Other languages
German (de)
English (en)
Other versions
EP3698928A1 (fr
Inventor
Martin Rohrbach
Kerry Henn
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.)
Martor KG
Original Assignee
Martor KG
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 Martor KG filed Critical Martor KG
Publication of EP3698928A1 publication Critical patent/EP3698928A1/fr
Application granted granted Critical
Publication of EP3698928B1 publication Critical patent/EP3698928B1/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
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/02—Hand knives with adjustable blade; Pocket knives with pivoted blade
    • B26B1/04—Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position
    • B26B1/046—Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position with a locking member acting in axial direction parallel to the pivot axis of the blade
    • 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
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/08—Hand knives with adjustable blade; Pocket knives with sliding blade
    • 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 with a blade device.
  • the blade device includes a blade carrier and a blade.
  • Such a blade device is usually part of knives, especially cutter knives.
  • Such a knife is from the WO 99/00224 known.
  • the WO 99/00224 relates to a knife with a housing which has two housing parts which are pivotally connected to one another at a rear end by means of a hinge.
  • the knife further comprises a blade carrier 44 for receiving a blade 14.
  • the blade carrier 44 can be locked in different positions relative to the housing (see page 10, paragraph 2).
  • the blade carrier 44 is held on the housing by means of a rivet connection 47 and guided in an elongated hole 48.
  • the blade 14 is guided by webs 58 and 60 on an upper side and an underside of the blade seat (see page 10, last paragraph).
  • the blade 44 is positively engaged with a lateral T-shaped projection on an upper side of the blade carrier 44 (see page 11, paragraph 1).
  • Ribs 65 on an inside of the housing part 12b prevent lateral movement of the blade 44.
  • a knife according to the preamble of claim 1 is also from the DE 10 2011 007 234 known.
  • the object of the invention was to create a knife with a holding device that is inconspicuous for contamination.
  • the knife comprises a gear with a first gear part and a second gear part movable relative to the first gear part in order to move a blade device between a rest position in which a blade of the blade device is moved relative to a guard in such a way that the user does not come into contact with a cutting edge of the blade can come into contact and an operating position in which the blade is moved relative to the guard in such a way that a cutting operation is possible.
  • the blade device comprises a blade carrier and a blade that can be releasably fastened in the blade carrier.
  • the blade carrier is provided with a blade seat with a contact surface for a first blade surface.
  • a second blade surface opposite the first blade surface is essentially openly accessible or lies against a contact surface of the blade cover.
  • the blade carrier has a holding device for holding the blade in the blade seat, which comprises first positive locking means assigned to the blade carrier and second positive locking means assigned to the blade, which hold the blade in a positive locking manner at least in a plane parallel to the contact surface.
  • the positive locking means are designed such that the blade has at least one degree of freedom in one direction in order to be released from the blade seat.
  • the blade can be mounted, for example, between a contact surface of the blade carrier and a contact surface of a blade cover held on the blade carrier.
  • a blade cover may not be provided, so that one blade surface of the blade rests on a contact surface of the blade carrier and the opposite blade surface is exposed.
  • the holding device comprises a locking device with at least one latch that can be moved between a locking position and a release position, which engages over a region of the second blade surface or the blade cover and locks movement of the blade in the direction of the degree of freedom.
  • movement of the blade out of the blade seat is not possible in the locking position of the locking device because the degree or degrees of freedom of the blade are blocked by the lock.
  • the locking device is held on the blade carrier.
  • the latch can directly engage over at least an area of the second blade surface or at least over an area of a blade cover.
  • the latch can be releasably engaged with a receptacle which is held on the blade carrier.
  • the first positive locking means and the second positive locking means are, for example, designed such that the blade only has one degree of freedom in the pivoting direction.
  • the latch can, for example, be in contact with the blade at an end remote from the pivot axis, so that small holding forces are required due to the lever arm in order to hold the blade securely in its blade seat.
  • the first form-fitting means have, for example, at least one projection which interacts in a form-fitting manner with a complementary recess of the second form-fitting means, so that the blade can be threaded onto the projection with the recess.
  • the first form-fitting means have two projections, each projection interacting in a form-fitting manner with a recess in the blade.
  • the blade carrier has, for example, two projections and the blade has two recesses.
  • the first form-fitting means comprise, for example, at least one hook-shaped projection of the blade carrier, which releasably passes through a recess in the blade and the shape of the recess corresponds approximately to the cross section of the hook-shaped projection.
  • the blade is, for example, detachably arranged between a surface of the projection facing the second blade surface and a contact surface of the blade carrier.
  • the blade is detachably arranged between a holding surface of the projection facing the second blade surface and a contact surface of the blade carrier.
  • the locking element is designed as a wire or sheet metal.
  • the latch offers a small area for the deposition of particles that could impair the function of the knife.
  • the terms “wire” or “sheet metal” are to be understood as meaning that These can be made of metal, but other materials such as plastics or composites can also be considered. What is essential are the properties according to which, for example, a small deposit area is formed and / or according to which the material has good spring properties, as is the case with certain metals, for example.
  • the latch is designed, for example, as a spring.
  • the latch is formed by a first leg of a torsion spring.
  • the latch comprises, for example, a latch area and a storage area, the storage area being movably mounted in a bearing receptacle of the blade carrier.
  • the storage area is pivotally mounted in the bearing holder.
  • the storage area is formed, for example, by a second leg of a torsion spring, which is pivotally held in a bearing receptacle of the blade carrier.
  • the receptacle has a seat for the locking element.
  • the latch is held in the seat in such a way that it cannot accidentally come loose from the seat.
  • an area of the latch is locked into the seat.
  • the latch is loaded into the seat due to a spring force.
  • the receptacle is provided with an inclined surface which, when the bolt moves into the seat, deflects a force acting on the bolt element in a first direction into a second direction, which is directed orthogonally to the second blade surface.
  • the force can be formed, for example, by a spring force. In this way, the blade is loaded by the latch against the contact surface of the blade seat.
  • the projection also forms, for example, the receptacle for the locking element when it is arranged in the locking position. In this case, no separate element needs to be created for the seat of the locking element. In this way, space can also be kept free for structural elements on the blade carrier.
  • the locking element surrounds the blade or a recess in the blade and rests on the second blade surface.
  • FIG. 1 A knife in total according to. Fig. 1 is designated by reference number 10 in the figures.
  • the knife 10 comprises a first gear part 11 and a second gear part 12.
  • the first gear part 11 and the second gear part 12 are part of a gear 13, with which a blade device 40 comprising a blade carrier 14 and a blade 17 can be moved between a rest position and an operating position .
  • the rest position is in Fig. 1 shown. Due to a movement of the second gear part 12 in the direction u1 about a pivot axis a1 relative to the first gear part 11, the blade carrier 14 can be pivoted from the rest position into an operating position.
  • the operating position is in Fig. 2 shown. From the resting position according to Fig. 1 the second gear part 12 can be moved relative to the first gear part 11 in the direction u2, with the knife 10 in a blade changing position according to Fig. 3 is moved. In the blade changing position, the blade carrier 14 is accessible and a blade change can be carried out.
  • the blade carrier 14 comprises according to Fig. 4 a rear extension 15 for articulated mounting on the transmission 13. To form the pivot joints, the extension 15 has openings 19a and 19b.
  • the blade carrier 14 includes a blade seat 16 for fastening a blade 17, which is provided with a cutting edge 18 and includes a first blade surface 43 and a second blade surface 44 opposite the first blade surface 43.
  • the blade 17 is detachably attached to the blade carrier 14 by means of a locking device 30.
  • projections 21 and 22 are held, which in the present exemplary embodiment are cut out of the blade carrier 14 and are exposed from a plane E, which is an x / z direction, of the blade seat, so that they have a region projecting in the direction y1 and have an area that is parallel to the plane E.
  • the projections 21 and 22 pass through recesses 23 and 24 in the blade 17.
  • the projection 22 forms a seat 45.
  • a region 31 of the projection 21 that extends parallel to the plane E has a width K1 that is greater than the width K2 of the opening 23.
  • the cross section of the projection 21 corresponds approximately to the dimensions of the recess 23 in the x direction and z direction or is slightly smaller. For this reason, the blade 17 cannot be easily detached from the projection 21 in the direction y1. Rather, this requires a pivoting movement of the blade in the direction v1 Fig. 5 necessary.
  • the recess 24 in the blade is designed such that the blade 17 can be moved over the area 32 of the projection 22 when pivoting in the direction v1.
  • the pivoting guide is dictated by the shape of the projection 21.
  • a bar is arranged between a holding surface 33 of the projection 22 and the outer surface 44 of the blade 17, which prevents the blade 17 from moving in the direction v1 (see Fig. 4 ).
  • the latch is formed by a leg 27 of a spring 25, the other leg 26 of which is pivotally held in a bearing device 35 of the blade carrier 14.
  • the storage device 35 comprises an extension 36 of the blade carrier 14 (see e.g Fig. 8 ) from which two arms 29a and 29b protrude in the direction y1.
  • An opening 37a is formed in the arm 29a and an opening 37b is formed in the arm 29b.
  • the openings 37a and 37b are aligned with each other.
  • the leg 26 passes through the openings 37a and 37b, so that a pivot axis a2 is formed, about which the spring 25 can be pivoted.
  • An end region 38 of the leg 26 is bent approximately at right angles to the longitudinal extent of the leg 26 in such a way that the spring 25 cannot be released from the bearing device 35.
  • a coiled central region 39 of the spring 25 prevents the spring from moving in the direction x2 through contact with the arm 29a.
  • An end region 41 of the spring leg 27 is bent over in such a way that it is easy to grasp, so that operation by the user can be carried out easily.
  • the spring leg 27 is subject to a preload about a pivot axis a3 of the spring 25 in the direction w1 in engagement with the projection 22. Due to a movement of the leg 27 against the spring force in the direction w2 and a subsequent pivoting about the pivot axis a2 in the direction p1 in the Figures 10 to 13 position shown, the lock can be released so that the blade 17 can be removed from the blade seat 16.
  • the blade 17 In the unlocked position according to the Figures 10 to 13 The blade 17 only has one degree of freedom in the pivoting direction v1. The blade can then be removed from the blade seat 16 by pivoting in the direction v1 and, if necessary, replaced by another blade 17.
  • the blade 17 can be reassembled according to Fig. 14a the recess 23 is brought into engagement with the projection 21 and the blade 17 is then pivoted onto the projection 21 in the direction v2 (see the Fig. 14b and 14c ) until the projection 22 passes through the recess 24 and the first blade surface 43 comes into contact with the contact surface 42.
  • the leg 27 of the spring 25 is then pivoted about the axis a2 in the direction p2 and locked in the seat 45 of the projection 22 by pivoting the leg 27 slightly against the force of the spring 25 in the direction w2 and then in the direction w1 into the seat 45 is introduced.
  • the holding device 20 according to the invention with the locking device 30 is not susceptible to contamination since there are hardly any structural designs, such as undercuts, angles, etc., which promote the accumulation of particles.
  • FIGS Fig. 16 to 22 A second embodiment of a blade device 140 is shown in FIGS Fig. 16 to 22 shown. Since the knife can be designed essentially as in the first exemplary embodiment except for the blade device 140, the remaining parts are not described.
  • the blade device 140 includes a blade carrier 114 and a blade cover 129.
  • a longitudinal central axis of the blade device 140 is designated m.
  • the blade carrier 114 and the blade cover 129 are parts of a holding device 120 for a blade 117.
  • the blade carrier 114 includes a rear extension 115 on which bearing pins 119a and 119b are formed.
  • the blade carrier 114 is provided with a blade seat 116, which includes a contact surface 142 of the blade carrier 114.
  • Pins 121 and 122 protrude from the blade carrier 114.
  • the pin 121 has a notch 136.
  • a storage area 137 of the blade carrier 114 is provided for pivotally mounting the blade cover 129.
  • the blade 117 includes a cutting edge 118 and two recesses 123 and 124.
  • the blade 117 is designed, for example, as a strip steel blade or as a ceramic blade.
  • a blade surface 143 of the blade 117 interacts with the contact surface 142 and a blade surface 144 of the blade 117 interacts with a contact surface 141 of the blade cover 129 when the blade 117 is in the locking position in the blade seat 116.
  • a spring 125 which in the present example is designed as a torsion spring, is part of a locking device 130. It has two End areas 126 and 127.
  • the spring 125 is mounted on the blade device 140 by means of a bearing device 135.
  • a bearing area 128 is provided on the blade cover 129, which is designed as a bearing pin 131 and is arranged coaxially to the wound area of the torsion spring.
  • the end region 127 is supported with pretension on a stop 132 of the blade cover 129.
  • the blade cover 129 also includes a projection 133 with a link 134, which is here designed in the form of an opening in the projection 133 and which is intended to limit the movement of the end region 127 of the spring 125.
  • the backdrop could also be omitted.
  • the blade cover 129 forms a contact surface 141 which is in Fig. 22 can be recognized.
  • the blade cover 129 can be moved in the direction o2 from the open position according to 18 and 19 about a pivot axis a4 into the closed position Fig. 17 and 20 can be pivoted to 22, in which the projection 121 passes through a recess 138 in the blade cover 129. Due to the bias of the spring 125, the end region 127 lies against an upper end region 139 of the link 134. The end region of the link 134 opposite the end region 139 is designated 145.
  • the end region 127 By deflecting the end region 127 slightly in the direction n1, it can be inserted into the notch 136.
  • the locking device 130 is then in the locking position, ie the blade cover 129 is prevented from moving in the direction o1 into the open position by means of the end region 127 acting as a lock.
  • the end area 127 extends over a region of an outer surface 146 of the blade cover 129 and lies against the outer surface 146.
  • the notch 136 is arranged on the projection 121 in such a way that the end region 127 must be moved against spring force in the direction n1 in order to move it out of the notch 136. In this way, the end region 127 does not accidentally come out of engagement with the notch 136.
  • the notch 136 is designed in such a way that it forms a motion transducer, so that the spring force exerted by the end region 127 in direction n2 is partially deflected into a force which moves the end region 127 in direction y1 (see Fig. 22 ) so that it exerts a force on the blade cover 129 in the direction o2.
  • the blade 117 is held firmly between the contact surfaces 142 and 141 and blades 117 with different thicknesses D can be securely fastened in the blade seat 116.

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

Claims (12)

  1. Couteau pourvu d'un organe de transmission comprenant une première partie d'organe de transmission et une seconde partie d'organe de transmission qui peut être déplacée par rapport à la première partie d'organe de transmission, et un dispositif de lame (40) comprenant un support de lame (14) ainsi qu'une lame (17) qui peut être fixée de façon détachable à l'intérieur du support de lame (14), dans lequel le dispositif de lame est déplacé par l'organe de transmission entre une position de repos, dans laquelle la lame (17) du dispositif de lame (40) est déplacée par rapport à un élément de protection de telle sorte que l'utilisateur ne puisse pas entrer en contact avec le bord tranchant (18) de la lame (17), et une position de fonctionnement, dans laquelle la lame (17) est déplacée par rapport à l'élément de protection de telle sorte qu'une opération de coupe soit possible, dans lequel le support de lame (14) comprend un siège de lame (16) qui présente une surface de support (42) pour une première surface de lame (43), dans lequel une seconde surface de lame (44) opposée à la première surface de lame (43) est sensiblement librement accessible, dans lequel le support de lame (14) comprend un dispositif de support (20) pour maintenir la lame (17) à l'intérieur du siège de lame (16), dans lequel ledit dispositif de support (20) comprend des premiers moyens de verrouillage par complémentarité de forme associés au support de lame (14) et des seconds moyens de verrouillage par complémentarité de forme associés à la lame (17), dans lequel lesdits moyens de verrouillage par complémentarité de forme maintiennent la lame (17) en réalisant un accrochage par complémentarité de forme au moins dans un plan parallèle à la surface de support (42), et dans lequel les moyens de verrouillage par complémentarité de forme sont conçus de telle sorte que la lame (17) présente un certain degré de liberté dans au moins une direction (v1) de manière à permettre sa libération du siège de lame (16), caractérisé en ce que le dispositif de support (20) comprend un dispositif de verrouillage (30) qui comprend au moins un verrou déplaçable entre une position de verrouillage et une position de déverrouillage et qui, dans la position de verrouillage, chevauche une région de la seconde surface de lame (44) ou d'un couvre de lame (129) et bloque un déplacement de la lame (17, 117) dans la direction (v1, y2) du degré de liberté, le verrou pouvant être engagé de façon libérable à l'intérieur d'un logement qui est maintenu sur le support de lame.
  2. Couteau selon la revendication 1, caractérisé en ce que les premiers moyens de verrouillage par complémentarité de forme et les seconds moyens de verrouillage par complémentarité de forme sont conçus de telle sorte que la lame (17) ne présente qu'un seul degré de liberté dans une première direction de pivotement (v1).
  3. Couteau selon l'une quelconque des revendications précédentes, caractérisé en ce que les premiers moyens de verrouillage par complémentarité de forme comportent au moins une saillie (21, 22) qui coopère avec un évidement complémentaire (23, 24) des seconds moyens de verrouillage par complémentarité de forme, de telle sorte que la lame (17) puisse être enfilée avec l'évidement (23, 24) sur la saillie (21, 22).
  4. Couteau selon la revendication 3, caractérisé en ce que les premiers moyens de verrouillage par complémentarité de forme comportent au moins une saillie (21) en forme de crochet qui traverse de façon amovible un évidement (23) de la lame (17), et dans lequel la forme de l'évidement (23) correspond sensiblement à la section transversale de la saillie en forme de crochet (21).
  5. Couteau selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que la lame (17) est agencée de façon amovible entre une surface de support (33) de la saillie (21, 22) orientée en direction de la seconde surface de lame (44) et une surface de support (42) du support de lame (14).
  6. Couteau selon l'une quelconque des revendications précédentes, caractérisé en ce que le verrou est conçu sous la forme d'un fil métallique ou d'une tôle.
  7. Couteau selon l'une quelconque des revendications précédentes, caractérisé en ce que le verrou mobile est conçu sous la forme d'un ressort.
  8. Couteau selon l'une quelconque des revendications précédentes, caractérisé en ce que le verrou forme une région de verrouillage et une région de stockage (26).
  9. Couteau selon l'une quelconque des revendications précédentes, caractérisé en ce que le logement présente une surface inclinée qui dévie une force exercée sur le verrou dans une première direction dans une seconde direction qui est orthogonale à la seconde surface de lame.
  10. Couteau selon l'une quelconque des revendications précédentes, caractérisé en ce que, dans la position de verrouillage, ledit au moins un verrou entoure la lame (17) et prend appui sur la seconde surface de lame (44).
  11. Couteau selon la revendication 1, caractérisé en ce que le dispositif de lame comprend un support de lame (114) ainsi qu'un couvre-lame (129).
  12. Couteau selon la revendication 11, caractérisé en ce que le couvre-lame (129) est monté de façon pivotante sur le support de lame (114).
EP20158515.5A 2019-02-23 2020-02-20 Couteau pourvu de dispositif de lame Active EP3698928B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019001282 2019-02-23

Publications (2)

Publication Number Publication Date
EP3698928A1 EP3698928A1 (fr) 2020-08-26
EP3698928B1 true EP3698928B1 (fr) 2024-03-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20158515.5A Active EP3698928B1 (fr) 2019-02-23 2020-02-20 Couteau pourvu de dispositif de lame

Country Status (4)

Country Link
US (1) US11376751B2 (fr)
EP (1) EP3698928B1 (fr)
CN (1) CN111604944B (fr)
ES (1) ES2975434T3 (fr)

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Publication number Priority date Publication date Assignee Title
DE102013014684A1 (de) * 2013-09-05 2015-03-05 Martor Kg Messer
DE102018117203B4 (de) * 2018-07-17 2024-02-01 Martor Kg Messer

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DE102011007234B3 (de) * 2011-04-12 2012-09-20 Martor Kg Sicherheits-Messer

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Also Published As

Publication number Publication date
US11376751B2 (en) 2022-07-05
ES2975434T3 (es) 2024-07-05
CN111604944B (zh) 2022-06-17
US20200276721A1 (en) 2020-09-03
CN111604944A (zh) 2020-09-01
EP3698928A1 (fr) 2020-08-26

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