EP3041646A1 - Messer - Google Patents
MesserInfo
- Publication number
- EP3041646A1 EP3041646A1 EP14783763.7A EP14783763A EP3041646A1 EP 3041646 A1 EP3041646 A1 EP 3041646A1 EP 14783763 A EP14783763 A EP 14783763A EP 3041646 A1 EP3041646 A1 EP 3041646A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- housing
- blade guard
- guard
- coupling
- 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.)
- Granted
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 53
- 230000008878 coupling Effects 0.000 claims description 78
- 238000010168 coupling process Methods 0.000 claims description 78
- 238000005859 coupling reaction Methods 0.000 claims description 78
- 230000001133 acceleration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B29/00—Guards or sheaths or guides for hand cutting tools; Arrangements for guiding hand cutting tools
- B26B29/06—Arrangements for guiding hand cutting tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B29/00—Guards or sheaths or guides for hand cutting tools; Arrangements for guiding hand cutting tools
- B26B29/02—Guards or sheaths for knives
-
- 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
Definitions
- the invention relates to a knife.
- the knife comprises a housing on which a blade is mounted.
- the blade is e.g. stored in a blade holder.
- the knife has a blade guard, which is movably mounted on the housing between at least one safety position in which a blade edge is covered by the blade guard and at least one cutting position in which the blade is freely accessible.
- Such a knife is known from US 2009/0271988 A1.
- a blade guard is pivotally mounted on the housing.
- a blade carrier is also pivotally mounted on the housing.
- a safety lever pivotally mounted on the blade guard prevents movement of the blade guard when an end portion of the safety lever is in contact with a stop of the housing. By means of a handle, the safety lever can be moved out of engagement with the stop, whereby a movement of the blade guard is possible.
- the blade guard can be pivoted by placing it on the material to be cut from a safety position projecting out of the housing and a cutting position retracted into the housing.
- the blade carrier is coupled to the blade guard such that upon movement of the blade guard from the safety position to the cutting position, the blade carrier is pivoted from a rearward position in which a blade projects slightly out of the housing into a forward position in which Cutting process is possible.
- a knife has the disadvantage that the blade guard can be placed on the material to be cut
- CONFIRMATION COPY in order to move it to the cutting position, which is often undesirable, especially with sensitive materials.
- the invention is solved by a knife having the features of claim 1.
- an actuating device by means of which the blade guard between the safety position of the cutting position is movable.
- the actuating device comprises a handle, which is movable between an unactuated and an actuated position. By moving the handle of the actuator from the unactuated to an actuated position, e.g. the blade guard from the safety position in the cutting position movable.
- the blade guard is e.g. loaded by a spring in the safety position.
- the actuator comprises the entire drive train of the blade guard.
- the actuating device comprises a handle, by means of which a user of the knife can operate the blade guard.
- the handle is eg movable between an unactuated and an actuated position. In the unactuated position the blade guard is eg in the safety position. In the actuated position the blade guard is eg in a cutting position. As the actuated position is hereinafter referred to the maximum actuated position of the handle.
- one or more actuators are formed, which are motion-connected with each other.
- the blade carrier may be part of the actuator when the blade guard is in motion communication with the blade carrier.
- a blade edge is hidden by the blade guard.
- the blade guard is arranged so relative to the cutting edge that the user can not hurt himself at the cutting edge.
- the blade guard is removed from the cutting edge so that a cutting operation is possible and the user can put the blade on the cutting material.
- the blade is e.g. detachably mountable in a blade holder.
- the blade holder may include frictional and positive locking means to hold the blade in a particular position.
- Common means are e.g. Projections of the blade holder, which engage in recesses of the blade.
- a projection may partially surround the contour of the blade.
- the blade holder may also include a blade seat and a flap with the blade disposed between the tumbler and the flap.
- the blade is immovably held to the housing according to one embodiment. That is, the blade is immovable when mounted relative to the housing. Nevertheless, it can e.g. be solvable for a blade change.
- the blade or a blade holder for holding the blade is movably held on the housing.
- the blade may, for example, be movable between at least one rest position and at least one working position.
- the blade is movable, for example between a first and a second rest position and a first and a second working position.
- In the resting position is the Blade positioned so that a blade edge can be hidden by the blade guard.
- the blade guard is in the safety position, for example, when the blade is in the rest position.
- the blade guard In the working position of the blade, the blade guard is arranged, for example, in the cutting position.
- the blade or the blade carrier may e.g. be moved against the blade guard.
- Both the blade and the blade guard have different pivoting directions.
- the security state is faster recoverable in this way.
- less movement of the blade guard is required to establish the safety position.
- the blade are at least partially displaced into the housing of the knife, so that the blade guard in the rest position of the blade only has to cover the part of the cutting edge that protrudes from the housing.
- the blade or the blade carrier are e.g. loaded by a spring in the rest position.
- the blade can e.g. between at least one rest position and at least one working position to be pivotally mounted on the housing.
- the pivotal movement of the blade is e.g. combined with a translatory movement.
- the blade is moved only translationally.
- the blade guard is eg pivotally mounted on the housing.
- the blade guard and the housing form a pivot joint.
- the pivoting movement of the blade guard is eg combined with a translatory movement.
- the blade guard is merely moved translationally.
- the actuator includes, for example, an eccentric drive.
- an actuator of the actuator is eccentric, ie spaced from the pivot axis, attached to the pivotable blade or a pivotally mounted blade carrier, and can rotationally drive the blade or blade carrier.
- an actuating element of the actuating device is mounted eccentrically on a pivotally mounted blade guard, so that the blade guard is rotatably movable in this way.
- the knife has, for example, a volitional return movement of the
- the actuator comprises e.g. between the blade guard and a handle of the actuating device, a clutch with a first coupling element associated with the handle and a second coupling element associated with the blade guard.
- the first coupling element and the second coupling element are detachably movable into engagement.
- the second coupling element is e.g. motion-connected with the blade to cause disengagement of the coupling elements by movement of the blade. The release of the coupling elements then allows e.g. the return movement of the blade guard, even if the handle is in the actuated position.
- the knife In order to provide a voluntary retraction of the blade guard in the safety position, the knife according to an alternative embodiment, a different coupling.
- the coupling comprises a first coupling element assigned to the actuating device or the blade guard and a second coupling element assigned to the housing.
- the first coupling element and the second coupling element are also releasably engageable in this embodiment movable.
- the first coupling element is movably connected to the blade to cause disengagement of the coupling elements by movement of the blade.
- the Releasing the coupling elements also allows in this case, the return movement of the blade guard, even if the handle is in the actuated position.
- the first coupling element and the second coupling element are movable, for example, by a movement of the blade from a first working position to a second working position.
- one of the coupling elements is connected to the blade such that movement of the blade disengages the coupling elements.
- the decoupling according to another embodiment may take place in that a flywheel of the clutch is moved by a strong acceleration, which occurs when slipping off the cutting material. Moving the flywheel disengages the coupling elements.
- the coupling elements could be disengaged by a cutting force acting on the blade causing movement of the blade carrier.
- the actuator is e.g. designed such that the
- FIG. 5 shows a second embodiment of the knife with blade movably mounted on the housing, wherein the blade guard in the safety position and the blade is arranged in a rest position,
- FIG. 7 shows, on the basis of FIG. 6, the knife with the handle in the actuated position, the blade guard in a second cutting position and the blade in a second working position and with the coupling elements of an actuating device separated from each other
- FIG. Fig. 8 shows the knife in accordance with Fig. 7, wherein the handle is in the actuated position and the blade guard is moved to the safety position.
- the knife according to the first embodiment as a whole is designated in FIGS. 1 to 4 by the reference numeral 10. Like reference numerals in the different figures of the first embodiment denote corresponding parts.
- the knife 10 comprises according to FIG. 1, a housing 11 which forms a handle on which the knife 10 can be held by the user. On the housing 11, a blade 12 is mounted.
- the blade 12 is fixedly mounted on the housing 11, wherein a portion of the blade 12 protrudes from the housing 11.
- the blade 12 is provided with a cutting edge 13.
- the blade 12 could also be movably mounted on the housing.
- a blade guard 14 is pivotally mounted on the housing about a pivot axis a1 between a safety position and a cutting position and forms with the housing 11 a pivot joint G1.
- the blade guard 14 is bow-shaped and encloses in the safety position shown in FIG. 1, the blade 12 such that it is inaccessible to a user, so that the user can not hurt it.
- a handle 15 is pivotally mounted about a pivot axis a2 between an unactuated position and an actuated position on the housing 11 and forms with the housing 11 a pivot joint G2.
- the "actuated position” the maximum actuated position of the handle according to FIGS. 2, 3 and 4 is designated below Handle 15, the blade guard 14 between the safety position and the cutting position shown in Fig. 2 is movable.
- the handle 15 is part of an actuator 16.
- the handle 15 is formed by a pivotally mounted on the housing 11 lever, but it does not matter in the invention. Rather, the handle 15 could also be formed by a slider according to an alternative embodiment.
- the handle 15 comprises a projection 17 with a cam 18.
- the cam 18 is in contact with an inclined surface 19 of a carriage 20 inclined to the movement direction x1, x2.
- the carriage 20 is in the directions x1 and x2 between a rear position and a front position Position movably mounted in the housing 11.
- a clutch lever 22 is pivotably mounted on the carriage 20 about a pivot axis a3 between an engagement position and a release position and forms with the carriage 20 a pivot joint G3.
- a spring 27 which is fixed at one end to the housing 11 and at another end to the clutch lever 22, the clutch lever 22 is loaded in the engaged position shown in FIG.
- a weight 24 is attached on the clutch lever 22, a weight 24 is attached.
- the weight 24 is fastened in particular to a free end 23 of the coupling lever 22.
- the clutch lever 22 is provided with a first coupling projection 25.
- the first coupling protrusion 25 is engaged with a second coupling protrusion 28 of a coupling slide 29.
- the coupling protrusions 25 and 28 form a coupling 38.
- the coupling lever 22 In the engaged position, the coupling lever 22 is arranged such that the first coupling protrusion 25 is displaceable in engagement with the second coupling protrusion.
- the coupling projections 25 and 28 are disengaged.
- the coupling carriage 29 is movably supported in the housing 1 1 in directions x1 and x2 between a rearward position and an advanced position.
- a spring 30, which is secured with one end portion on the housing and with another end portion on the coupling carriage 29, loads the coupling carriage 29 in the rearward position.
- a first end region 31 of a link 32 forms with the coupling carriage 29 a pivot joint G4 with the pivot axis a4.
- a second end region 33 of the link 32 forms with a lever arm 34 attached to the blade guard 14 a pivot joint G5 with the pivot axis a5.
- the handle 15 is pivoted from the unactuated position shown in FIG. 1 in the direction u1 in the actuated position shown in FIG.
- a force F is exerted by the cam 18 on the inclined surface 19.
- the force F has a portion which acts in the direction x1, so that the carriage 20 against the force of the spring 21 from the rear position of FIG. 1 in the direction x1 in the front position (see Fig. 2) is moved, wherein the Cam 18 slides on the inclined surface 19 from a first point 35 to a second point 36.
- the coupling lever 22 pivotally mounted on the carriage 20 is also moved in the direction x1.
- the first coupling projection 25 of the clutch lever 22 is engaged with the second Clutch projection 28 of the coupling carriage 29 so that it is also moved against the force of the spring 30 from the rearward position in the direction x1 in the advanced position.
- the coupling carriage 29 is displaced to the advanced position, it moves the blade guard 14 in the direction w1 to the cutting position via the link 32 and the lever arm 34 (see FIG. 2).
- the knife 10 has a volitional blade protection return movement. If the user slipping off the cutting material when cutting, so is the jerky movement down in the direction z of the clutch lever 22 pivoted in the direction vi due to the inertia against the spring force of the spring 27, wherein the first coupling projection 25 and the second coupling projection 28 disengaged move (see Fig. 3). So that the clutch lever 22 can pivot in the direction vi, a recess 26 is provided on the carriage 20. Then the coupling carriage 29 is pulled by the spring 30 in the rearward position, via the handlebar 32 and the lever arm 34 of the blade guard 14 is moved in the direction w2 in the safety position (see Fig. 4), although the handle 15 is still in is the actuated position.
- the blade guard 14 is moved toward the front on a provided with the cutting edge 13 side 37 of the blade 12 in the movement in the safety position. With decreasing force on the handle 15, the carriage 20 is moved back by the spring 21 in the rear position and indirectly while the handle 15 is moved in the direction u2 in the unactuated position.
- a second embodiment of the knife is shown in FIGS. 5 to 8.
- the knife according to the second embodiment is designated overall by the reference numeral 110. Like reference numerals in the different figures of the second embodiment denote corresponding parts.
- the blade 110 includes a housing 111.
- a blade carrier 112 Between the housing 111 is a blade carrier 112 between a first rest position shown in FIG. 5, a first working position shown in FIG. 6, a second working position shown in FIG. 7 and one shown in FIG second rest position movable.
- the blade carrier 112 forms with the housing 111 a pivot joint G2 with a pivot axis a2.
- a blade 113 with a cutting edge 114 is detachably fastened.
- a blade guard 115 forms with the housing 111 a pivot joint G1 with a pivot axis a1.
- the blade guard 115 is pivotable between the first safety position shown in Fig. 5, a first cutting position shown in Fig. 6, a second cutting position shown in Fig. 7, and a second safety position shown in Fig. 8.
- the blade guard 115 is moved over the blade 114 such that the blade is inaccessible to a user.
- the blade guard In the first cutting position, the blade guard is moved away from the cutting edge, so that the cutting edge can be placed on the cutting material and a cut can be carried out.
- the blade carrier 112 and the blade guard 115 are motion coupled.
- the blade guard 115 is in the first safety position when the blade carrier 112 is disposed in the first rest position (see FIG. 5).
- the blade guard 1 15 is moved to the first cutting position (see Fig. 6) and when the blade carrier 1 12 moves to the second working position, the blade guard 1 15 is moved to the second cutting position (see FIG 7).
- the blade guard 1 15 is in the second safety position when the blade carrier 1 12 is arranged in the second rest position (see Fig. 8).
- the motion coupling occurs e.g. via a toothing 16 of the blade carrier 1 12, which engages with a toothing 17 of the blade guard 1 15. In this way, move the blade carrier 1 12 and the blade guard 1 15 in opposite directions. That is, when the blade carrier 1 12 pivots in the direction u1, the blade guard 1 15 pivots in the direction w1 and when the blade carrier 1 12 pivots in direction u2, the blade guard 1 15 pivots in the direction w2.
- a handle 1 18 is part of an actuator 122 and for actuating the blade carrier 1 12 and the blade guard 1 15 is provided.
- the handle 1 18 is translationally movable in the directions x1 and x2 between an unactuated position shown in FIG. 5 and an actuated position shown in FIG. From the unactuated position, the handle 1 8 in the direction x1 in the actuated position is movable. From the actuated position, the handle 1 18 in the direction x2 in the unactuated position is movable.
- the handle is e.g. loaded by a restoring force of only schematically indicated by a dashed line spring 125 in the unactuated position.
- the spring 125 is attached to the housing 1 11 and to the handle 1 18.
- the handle could, as in the first embodiment, also be formed by a pivotally mounted on the housing 1 1 1 lever.
- the handle 118 comprises a first coupling element 119 in the form of an elastically deformable arm.
- the first coupling element 119 is formed, for example, on the handle 118 or connected to the handle 118.
- a free end of the first coupling element 119 can be moved into engagement with a second coupling element 120 and also released therefrom.
- the second coupling element 120 is formed by a region of an actuating element 121 of the actuating device 122.
- the actuating element 121 is formed by a lever which forms a pivot joint G3 with a pivot axis a3 with a guide part 123.
- the guide member 123 is movably guided in the housing 111 in the directions x1 and x2.
- the pivot axis a3 is not movable relative to the guide member 123, but formed movable relative to the housing 111.
- no guide member 123 is provided and a pivot axis a3 forming pin of the pivot joint G3 is received in a slotted guide of the housing 111, wherein the slotted guide movement of the pin in the direction x1 and x2 and pivoting of the actuating member 121st allowed around the pin.
- the actuator 121 is formed in the present embodiment of a two-armed lever.
- the actuating element 121 comprises a first lever arm 124.
- a second lever arm forms the second coupling element 120.
- a fourth pivot joint G4 with a pivot axis a4 is formed by the actuating element 121, in particular the first lever arm 124 of the actuating element 121, and by the blade carrier 112.
- the pivot joint G4 is arranged eccentrically from the pivot axis a4 on the blade carrier 112, so that upon movement of the actuating part 121 in the direction x1 of the blade carrier 124 is pivoted in the direction u1.
- the first coupling element 119 and the second coupling element 120 are in engagement.
- the first coupling element 119 and the second coupling element 120 engage after a short movement of the handle 118 from the unactuated position in the direction x1, while they are still disengaged in the unactuated position of the handle 118.
- the actuator 121 and the joint G3 and the guide member 123 are also moved in the direction x1.
- the actuating member 121 pivots about the joint G4 the blade carrier 112 in the direction u1 in the first working position shown in FIG. 6. Due to the meshing teeth 116 and 117 of the blade guard 115 in a relative to the blade carrier 112 opposite direction of rotation in direction w1 in the first Swung cutting position, which is shown in Fig. 6.
- the actuating element 121 is pivoted in the direction of p2 by the pivoting movement of the blade carrier 112, wherein the first coupling element 119 is deflected against its elastic restoring force in the direction y1.
- the actuating element 121 is further pivoted in the direction p2 in the position shown in FIG. 7, wherein the first coupling element 119 and the second coupling element 120 are released from each other.
- the first coupling element 119 is moved back by its elastic restoring force after release of the coupling elements 119 and 120 in the direction y2 in its initial position (see Fig. 7).
- the blade carrier 112 which is loaded by a spring, not shown, in the rest position, after the coupling elements 119 and
- Handle 118 is in the actuated position. Due to the movement of the blade carrier 112 in the direction of u2, the blade guard 115 in the direction w2 in the second safety position and the actuator
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Knives (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013014684.4A DE102013014684A1 (de) | 2013-09-05 | 2013-09-05 | Messer |
PCT/DE2014/000451 WO2015032380A1 (de) | 2013-09-05 | 2014-09-05 | Messer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3041646A1 true EP3041646A1 (de) | 2016-07-13 |
EP3041646B1 EP3041646B1 (de) | 2020-03-04 |
Family
ID=51690778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14783763.7A Active EP3041646B1 (de) | 2013-09-05 | 2014-09-05 | Messer |
Country Status (6)
Country | Link |
---|---|
US (1) | US10994434B2 (de) |
EP (1) | EP3041646B1 (de) |
CN (1) | CN105682869B (de) |
DE (1) | DE102013014684A1 (de) |
ES (1) | ES2787210T3 (de) |
WO (1) | WO2015032380A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202013007112U1 (de) * | 2013-08-09 | 2014-11-13 | Martor Kg | Messer |
DE102016008724A1 (de) * | 2016-07-21 | 2018-01-25 | Martor Kg | Messer |
US10207414B2 (en) * | 2016-11-17 | 2019-02-19 | Goodrich Corporation | Safety knife with retractable sheath |
DE102018117203B4 (de) * | 2018-07-17 | 2024-02-01 | Martor Kg | Messer |
DE102019001280A1 (de) * | 2019-02-23 | 2020-08-27 | Martor Kg | Messer |
US11254020B2 (en) * | 2019-12-11 | 2022-02-22 | Tsang Wing WONG | Safety cutter |
US11919179B2 (en) | 2020-03-31 | 2024-03-05 | Aob Products Company | Out-the-front knife |
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US10300615B2 (en) * | 2016-04-06 | 2019-05-28 | Earl Votolato | Utility knife with improved safety features |
USD864692S1 (en) * | 2017-10-18 | 2019-10-29 | Martor Kg | Utility knife |
DE102018117203B4 (de) * | 2018-07-17 | 2024-02-01 | Martor Kg | Messer |
ES2975434T3 (es) * | 2019-02-23 | 2024-07-05 | Martor Kg | Cuchillo con dispositivo de cuchilla |
DE102019001280A1 (de) * | 2019-02-23 | 2020-08-27 | Martor Kg | Messer |
-
2013
- 2013-09-05 DE DE102013014684.4A patent/DE102013014684A1/de not_active Ceased
-
2014
- 2014-09-05 CN CN201480057567.0A patent/CN105682869B/zh active Active
- 2014-09-05 WO PCT/DE2014/000451 patent/WO2015032380A1/de active Application Filing
- 2014-09-05 EP EP14783763.7A patent/EP3041646B1/de active Active
- 2014-09-05 US US14/915,541 patent/US10994434B2/en active Active
- 2014-09-05 ES ES14783763T patent/ES2787210T3/es active Active
Also Published As
Publication number | Publication date |
---|---|
DE102013014684A1 (de) | 2015-03-05 |
EP3041646B1 (de) | 2020-03-04 |
US10994434B2 (en) | 2021-05-04 |
CN105682869A (zh) | 2016-06-15 |
WO2015032380A1 (de) | 2015-03-12 |
ES2787210T3 (es) | 2020-10-15 |
US20160229074A1 (en) | 2016-08-11 |
CN105682869B (zh) | 2018-07-31 |
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