EP3090843A1 - Couteau - Google Patents

Couteau Download PDF

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Publication number
EP3090843A1
EP3090843A1 EP16000942.9A EP16000942A EP3090843A1 EP 3090843 A1 EP3090843 A1 EP 3090843A1 EP 16000942 A EP16000942 A EP 16000942A EP 3090843 A1 EP3090843 A1 EP 3090843A1
Authority
EP
European Patent Office
Prior art keywords
handle
region
blade
actuating surface
actuating
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Withdrawn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
EP16000942.9A
Other languages
German (de)
English (en)
Inventor
Martin Herlitz
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 EP3090843A1 publication Critical patent/EP3090843A1/fr
Withdrawn legal-status Critical Current

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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
    • B26B1/08—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
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/10—Handles
    • 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 knife includes a housing, and a blade.
  • the blade is e.g. mounted in a blade carrier, which is movably mounted in the housing between at least one safety position and at least one cutting position.
  • the blade carrier In the safety position, the blade carrier is retracted into the housing so that the blade mounted in the blade carrier is inaccessible to the user.
  • the blade In the cutting position, the blade protrudes out of the housing.
  • the blade carrier can perform a translatory, a rotary or a combined movement with translational and rotational portion between the safety position and the cutting position.
  • the blade is immovably or movably mounted on the housing.
  • a blade guard is movably supported relative to the blade between a safety position and a cutting position. In the safety position, the blade guard is moved over an edge of the blade so that the user can not injure himself. In the cutting position, the blade guard is moved away from the cutting edge and a cutting operation can be performed.
  • the blade guard can perform a translatory, a rotary or a combined movement with translational and rotational portion between the safety position and the cutting position.
  • the actuating device comprises a handle and possibly a transmission device.
  • the transfer device may include one or more parts that transmit movement of the handle to the blade carrier or the blade guard.
  • the handle is associated with a first actuating surface.
  • the first actuating surface is arranged, for example, directly or indirectly on the handle. "Arranged indirectly on the handle” means, for example, that the actuating surface can also be formed on a separate part, which with the handle is in active connection. This could be part of the transmission device, for example.
  • a second actuating surface is associated with the blade carrier or the blade guard.
  • the second actuating surface is e.g. arranged directly or indirectly on the blade carrier or the blade guard.
  • "Arranged indirectly on the blade carrier or blade guard” means, for example, that the actuating surface can also be formed on a separate part which is in operative connection with the blade carrier or the blade guard. This could e.g. be a part of the transmission device.
  • the first actuating surface is in contact with the second actuating surface during movement between the safety position and the cutting position.
  • Such a knife is eg in the US 2003/0154606 described.
  • the handle is provided with a projection which cooperates with an actuating surface of the blade carrier to move the blade carrier from the safety position to the cutting position.
  • the first actuating surface and the second actuating surfaces can either already be in contact or are moved into contact with each other after a movement of the handle. During a movement of the handle, the first actuating surface is then moved relative to the second actuating surface, wherein both actuating surfaces are in contact. During the relative movement of the actuating surfaces of the blade carrier or the blade guard is moved from the safety position to the cutting position.
  • the actuating surfaces in a first region one of the actuating surfaces is formed such that a certain relative movement of the handle with respect to the housing has a first advancing movement of the blade carrier or the blade protection result.
  • the first area is e.g. short, if it is intended to set the system of handle, transfer device and blade carrier or blade guard in motion.
  • the actuating surface is designed such that the specific relative movement of the handle with respect to the housing has a second feed movement of the blade carrier or the blade guard result.
  • the second feed movement differs from the first feed motion.
  • the second feed movement is greater than the first feed movement, if in the second region the force required for the relative movement of the handle is less than in the first region.
  • the principle of the invention is based on the fact that the actuating surface, which is designed as a control surface, at least a first region and a second region, whereby the force-displacement ratio or the translation between the handle and the blade carrier or blade guard in the course of movement between the safety position and the cutting position is changed.
  • the advancing movement of the blade carrier is dependent on the inclination of the actuating surface, which is designed as a control surface, relative to the other actuating surface.
  • the invention can be used to reduce the initial resistance in the operation of the knife.
  • the blade carrier or the blade guard have sliding surfaces, which are in contact with counter surfaces of the housing during the movement between the safety position and the first cutting position.
  • To the blade carrier or the blade guard by means of the handle from the safety position To move out, for example, friction forces must be overcome. Frictional forces occur, for example between the blade carrier and the blade guard and the housing, between the transfer device and the housing and between the first actuating surface and the second actuating surface. This leads to a relatively high resistance at the beginning of the movement of the handle.
  • the control surface may be formed in the first region such that the actuation force is low despite the increased initial resistance.
  • the control surface may be configured such that, after the initial resistance has been overcome and the sliding friction has been used, the force-displacement relationship or the translation differs from the first region.
  • the operating force of the handle may e.g. remain the same in the second area with respect to the first area, wherein in the second area increases the advancing movement of the blade carrier or the blade guard with respect to the first area.
  • At least a portion of the control surface is formed as a curve.
  • the curve has different slopes, i. the force acting on the second actuating surface and effective for the movement of the blade carrier or the blade guard force varies over the course of the first region.
  • control area is e.g. formed linear.
  • force component that is effective for moving the blade carrier or the blade guard is constant.
  • the control surface has e.g. at least two linear regions of different pitch. The linear regions form e.g. an angle ⁇ ⁇ 180 °.
  • the control surface may also have combinations, wherein at least one region is formed as a curve and at least one region as a straight line is. For example, in the region of the point of intersection of two linear regions which form an angle of ⁇ ⁇ 180 ° with one another, the control surface may be in the form of a curve which approaches tangentially to both linear regions. In this way, it is possible to ensure a smooth, transition-free transition from the first area to the second area when the user is actuated.
  • the handle is e.g. pivoted.
  • the handle can e.g. be pivotally mounted on the housing.
  • the handle is then rotationally moved between the unactuated and the actuated position.
  • the handle is mounted translationally movable on the housing.
  • the handle is translationally moved between the unactuated and the actuated position.
  • the handle can e.g. also perform a combined movement relative to the housing comprising translational and rotational portions.
  • a part of the handle or a part connected to the handle forms e.g. an actuating surface.
  • the blade carrier or the blade guard is e.g. loaded by a spring in the safety position.
  • the blade carrier is moved by the spring into the safety position when the user no longer exerts any force on the handle or when the movement connection between the handle and the blade carrier or the blade guard is released.
  • the second actuating surface is e.g. held by the spring or by a separate spring in contact with the first actuating surface.
  • the handle may e.g. be loaded by the spring in the unactuated position.
  • a sliding contact is formed between the first actuating surface and the second actuating surface.
  • the blade carrier or blade guard is moved from the safety position to the cutting position.
  • the first actuating surface slides relative to the second actuating surface.
  • the first could be Actuating surface and / or the second actuating surface but also have a rolling bearing, which rolls on the other surface.
  • the actuating surface which cooperates with the control surface can e.g. be convex, in particular dome-shaped, so that between the first actuating surface and the second actuating surface a line or point contact is present.
  • a knife as a whole is denoted by the reference numeral 10 in the figures.
  • Like reference numerals in the various figures indicate corresponding parts, even if small letters are added or omitted.
  • the knife 10 comprises according to Fig. 1 a housing 11 and a handle 12.
  • a sliding in the housing 11 blade carrier 14 is in the housing 11 between at least one safety position (see the Fig. 1 and 2 ) and at least one cutting position (see Fig. 3 and 4 ) movably mounted.
  • the blade carrier 14 is slidably mounted in the housing 11. During the movement of the blade carrier 14, outer surfaces of the blade carrier 14 cooperate with inner surfaces of the housing 11.
  • a blade 15 held on the blade carrier 14 is arranged in the housing 11, and in the cutting position the blade 15 projects out of an opening 17 of the housing 11.
  • the handle 12 is part of an actuator 13 for displacing the blade carrier 14 between the safety position and the cutting position.
  • the handle 12 is about a pivot axis a between an unactuated position (see the Fig. 1 and 2 ) and a maximum actuated position (see Fig. 3 and 4 ) pivotally mounted on the housing 11.
  • the handle 12 forms with the housing 11 a pivot joint G1. From the unactuated position according to the Fig. 1 and 2 is the handle 12 in the direction w1 in the actuated position according to the Fig. 3 and 4 pivotable.
  • the handle is pivotable in the direction w2 in the unactuated position.
  • An actuating projection 22 with a first actuating surface 23 is formed on the handle 12.
  • the first actuating surface 23 is convex, but it may also have a different shape.
  • the blade carrier 14 has a rear extension 18 on which a second actuating surface 19 in the form of a control surface is formed (see, for example, FIGS Fig. 5 and 10 ).
  • the second actuating surface 19 comprises a first region 20 and a second region 21.
  • the first region 20 and the second region 21 are formed substantially linearly and form an angle of ⁇ ⁇ 180 °.
  • the actuating area 19 is formed in the area of an imaginary intersection P1 of the first area 20 and the second area 21 as a curve 24 (see, eg Fig. 10 ).
  • the curve 24 tangentially approaches the first region 20 and the second region 21.
  • a spring 16 is fixed to the blade carrier 14 and to the housing 11 and loads the blade carrier 14 in the direction x2 in the safety position.
  • the first actuating surface 23 of the handle 12 and the second actuating surface 19 of the blade carrier 14 are held by the spring 16 in contact with each other. Between the first actuating surface 23 and the second actuating surface 19 is e.g. a line or point contact.
  • the handle 12 is loaded via the contact between the actuating surfaces 19 and 23 of the spring 16 in the pivoting direction w2 in the unactuated position.
  • the blade carrier 14 moves in the direction x1 in the cutting position according to the Fig. 3 and 4 , Since the trajectory of the blade carrier 14 is curved, the directions x1 and x2 are understood as moving on the curved trajectory.
  • the pivoting of the handle 12 by a pivoting angle ⁇ in the direction w1 results in the first actuating surface 23 moving relative to the second actuating surface 19 in the first region 20 in the direction z1 up to the point P2 (see, for example, FIGS Fig. 6 . 7 and 10 ), wherein the actuating surfaces 23 and 19 are in sliding contact.
  • the blade carrier 14 is thereby moved counter to the spring force of the spring 16 by a first amount of travel in the direction x1.
  • the directions z1 and z2 are to be understood as directions of movement of the actuating surface 23 relative to the actuating surface 19.
  • the handle 12 is pivoted further in the direction w1 by the pivoting angle ⁇ , the first actuating surface 23 moves relative to the second actuating surface 19 in the second region 21 (see FIG Fig. 8 ).
  • the blade carrier 14 is displaced by a second amount in the direction x1. The second amount is greater than the first amount.
  • the course of the second actuating surface 19 is discontinuous, i. the relationship between the movement of the handle 12 and the movement of the blade carrier 14 is not constant.
  • the profile is continuous, i. the relationship between the movement of the handle 12 and the movement of the blade carrier 14 is constant.
  • the blade carrier 14 is displaced by the spring 16 in the direction x2 in the safety position and moves over the actuating surfaces 19 and 23 and the handle 12 in the direction w2 in the unactuated position.
  • the first actuating surface 23 slides in the direction z2 relative to the second actuating surface 19th
  • the force F necessary to move the handle 12 from the unactuated position to the actuated position is approximately constant, although at the beginning of actuation the increased initial resistance caused by the stiction must be overcome.
  • a second embodiment is in the Fig. 9 and 10 shown.
  • a knife according to the second embodiment is designated overall by the reference numeral 110.
  • Like reference numerals in the different figures indicate corresponding parts.
  • the blade 110 includes a housing 111 and a blade 112.
  • the blade 112 is immovably fixed to the housing 111 relative to the housing 111 in unspecified fashion.
  • a blade guard 113 forms with the housing 111 a pivot joint G1 and is located between a in Fig. 8 illustrated safety position and a in Fig. 9 pivoting shown cutting position. From the safety position of the blade guard 113 is pivotable about a pivot axis a1 in the direction u1 in the cutting position. From the cutting position of the blade guard 113 is pivotable about the pivot axis a1 in the direction u2 in the safety position.
  • a spring 115 loads the blade guard 113 in the safety position.
  • the blade guard 113 In the safety position, the blade guard 113 is moved over a blade 114 of the blade 112 such that a user of the blade 110 can not be injured by the blade 114. In the cutting position of the blade guard 113 is pivoted away from the cutting edge 114, so that a cut is feasible.
  • the movement between the safety position and the cutting position is effected by means of an actuator 116.
  • the actuator 116 comprises a handle 117, a slider 118, a slide 119 and a handlebar 120.
  • a transmission device is formed by the slide 118, the slide 119 and the handlebar 120 ,
  • the handle 117 forms with the housing 111 a pivot joint G4 with a pivot axis a4.
  • the handle 117 is about the pivot axis a4 between the unactuated position according to Fig. 8 and the actuated position according to Fig. 9 movable.
  • the slider 118 is movable in directions x1 and x2. From the in Fig. 8 shown rear position, the slider 118 in the direction x1 in the in Fig. 9 shown front position movable. From the front position, the slider 118 is movable in the direction x2 in the rear position.
  • the slider 118 includes a projection 128 having a Stop 129 of the carriage 119 cooperates, so that the slide 118 entrains the carriage 119 in a movement in the direction x1 and also moves the carriage 119 in the direction x1.
  • the carriage 119 is only in the directions x1 and x2 between the in the Fig. 8 and 9 movable positions shown.
  • the carriage 19 forms with the handlebar 120 a pivot joint G2 with a pivot axis a2.
  • the handlebar 120 also forms with a fixed to the blade guard 113 connected lever arm 121 a pivot joint G3 with a pivot axis a3.
  • the handle 117 is provided with an extension 122, which has a first actuating surface 123.
  • the slider 118 is provided at a rear end portion 124 with a second operation surface 125 which is in contact with the first operation surface 123.
  • the second actuating surface 125 comprises a first region 126 and a second region 127.
  • the first region 126 is curved, while the second region 127 is linear.
  • the slider 118 moves in the direction x1.
  • the projection 128 of the slider 118 then takes over the stop 129 with the carriage 119 in the direction x1.
  • the handlebar 120 is displaced in the direction x1, which pivots the lever arm 121 fixedly connected to the blade guard 113 in the direction u1 in the cutting position.
  • the pivoting of the handle 117 by a pivoting angle ⁇ in the direction w1 has the result that the first actuating surface 123 moves relative to the actuating surface 125 in the first region 126 in the direction z1 up to the point P4, wherein the blade guard 113 against the spring force of Spring 115 is moved, for example, by a first amount of travel in the direction x1.
  • the directions z1 and z2 are to be understood as directions of movement of the first actuating surface 123 relative to the second actuating surface 125.
  • the blade guard 113 shifts by a second displacement in the direction of x1.
  • the second amount is greater than the first amount.
  • the profile of the second actuating surface 125 is discontinuous, i. the ratio between the movement of the handle 117 and the movement of the slider 118 is not constant.
  • the course is continuous, i. the ratio between the movement of the handle 117 and the movement of the slider 118 is constant.
  • the spring 115 is fixed to the carriage 119 at one end portion and to the housing 111 at another end portion.
  • the carriage 119 is therefore loaded by the spring 115 in the direction x2.
  • the slide 119 is moved by the spring 115 in the direction x2, wherein the handlebar 120 connected to the slide 119 pivots the blade guard 113 in the direction u2.
  • the slider 118 is also moved in the direction x2 via the stop 129 and the projection 128.
  • the first actuating surface 123 slides relative to the second actuating surface 125 in the direction z2. By the contact of the surfaces 125 and 123, the handle 117 is pivoted in the direction w2 in the unactuated position during the return movement of the slider 118.
  • the force-displacement ratio to the mechanical and physical conditions is adaptable so that the force required to actuate the handle are kept constant or -. in adaptation to ergonomic requirements - can be varied.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Details Of Cutting Devices (AREA)
EP16000942.9A 2015-05-08 2016-04-27 Couteau Withdrawn EP3090843A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015005768.5A DE102015005768A1 (de) 2015-05-08 2015-05-08 Messer

Publications (1)

Publication Number Publication Date
EP3090843A1 true EP3090843A1 (fr) 2016-11-09

Family

ID=55860672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16000942.9A Withdrawn EP3090843A1 (fr) 2015-05-08 2016-04-27 Couteau

Country Status (5)

Country Link
US (1) US20160325442A1 (fr)
EP (1) EP3090843A1 (fr)
JP (1) JP2016209584A (fr)
CN (1) CN106113095A (fr)
DE (1) DE102015005768A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160325442A1 (en) * 2015-05-08 2016-11-10 Martor Kg Knife

Families Citing this family (7)

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DE202013007112U1 (de) * 2013-08-09 2014-11-13 Martor Kg Messer
DE102013014684A1 (de) * 2013-09-05 2015-03-05 Martor Kg Messer
DE102018117203B4 (de) * 2018-07-17 2024-02-01 Martor Kg Messer
KR102357369B1 (ko) * 2018-09-19 2022-02-03 삼성중공업 주식회사 전선용 칼
US11084178B2 (en) * 2019-10-03 2021-08-10 Industro International Co., Ltd. Box cutter
US11254020B2 (en) * 2019-12-11 2022-02-22 Tsang Wing WONG Safety cutter
US11498231B1 (en) * 2021-08-29 2022-11-15 Raymond E Davis Utility cutter

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US5303474A (en) * 1992-11-30 1994-04-19 Psi, Inc. Safety utility knife
DE4315495A1 (de) * 1993-05-10 1994-11-17 Dennis Lohrengel Sicherheitsmesser
EP1273399A1 (fr) * 2001-07-06 2003-01-08 Mure & Peyrot Dispositif de coupe à lame rétractable.
US20030154606A1 (en) 2002-01-16 2003-08-21 Nottingham-Spirk Design Associates, Inc., An Ohio Corporation Utility knife
US20090106983A1 (en) * 2007-10-30 2009-04-30 Martor Kg Knife

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Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552008A1 (fr) * 1983-09-16 1985-03-22 Preposreve Sarl Perfectionnements aux couteaux a lame retractable automatiquement
US5303474A (en) * 1992-11-30 1994-04-19 Psi, Inc. Safety utility knife
DE4315495A1 (de) * 1993-05-10 1994-11-17 Dennis Lohrengel Sicherheitsmesser
EP1273399A1 (fr) * 2001-07-06 2003-01-08 Mure & Peyrot Dispositif de coupe à lame rétractable.
US20030154606A1 (en) 2002-01-16 2003-08-21 Nottingham-Spirk Design Associates, Inc., An Ohio Corporation Utility knife
US20090106983A1 (en) * 2007-10-30 2009-04-30 Martor Kg Knife

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160325442A1 (en) * 2015-05-08 2016-11-10 Martor Kg Knife

Also Published As

Publication number Publication date
JP2016209584A (ja) 2016-12-15
DE102015005768A1 (de) 2016-11-10
US20160325442A1 (en) 2016-11-10
CN106113095A (zh) 2016-11-16

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