EP3326768B1 - Electric knife - Google Patents

Electric knife Download PDF

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Publication number
EP3326768B1
EP3326768B1 EP17203336.7A EP17203336A EP3326768B1 EP 3326768 B1 EP3326768 B1 EP 3326768B1 EP 17203336 A EP17203336 A EP 17203336A EP 3326768 B1 EP3326768 B1 EP 3326768B1
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EP
European Patent Office
Prior art keywords
motor
blade
blade holder
electric knife
rod
Prior art date
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Active
Application number
EP17203336.7A
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German (de)
French (fr)
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EP3326768A1 (en
Inventor
Jean-Claude Peyrot
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.)
Mure et Peyrot SAS
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Mure et Peyrot SAS
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Publication of EP3326768A1 publication Critical patent/EP3326768A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B7/00—Hand knives with reciprocating motor-driven blades
    • 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
    • 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
    • B26B29/00—Guards or sheaths or guides for hand cutting tools; Arrangements for guiding hand cutting tools
    • B26B29/02—Guards or sheaths for knives
    • B26B29/025—Knife sheaths or scabbards

Definitions

  • the present invention relates to an electric knife ie a knife for which a blade is operated by an electric motor to assist the operator in its cutting operation.
  • the present invention applies in particular to cutter type knives with replaceable blade.
  • An electric knife type "cutter” is known documents US2006 / 053631 A1 and US2010 / 199501 A1 .
  • US2010 / 199501 A1 describes for its part a straight-wire blade knife which moves back and forth along a longitudinal axis of the knife under the action of an annular ring device angularly offset from a motor axis and forming a cam path for a fork provided with an axial rod for maneuvering the blade.
  • the present invention relates to the realization of an electric knife better suited to cutting operations where the blade is inclined at an acute angle, for example between 20 ° and 70 °, relative to the element to be cut.
  • the present invention provides an electric knife, comprising a knife body, forming a handle housing an electric motor, and a blade holder, received in the handle, carrying a blade and operated by the motor through a rotary motion converting device of the reciprocating motor of the blade holder; the knife body having a fixed axis perpendicular to the blade, on which is mounted the blade holder and which is positioned so that the blade holder is moved in rotation and back around said fixed axis by said motor and prints to the blade a swinging motion.
  • the blade oscillates or vibrates in a transverse direction unlike the prior art where the blade moves parallel to itself in the manner of a saw.
  • the blade holder can be mounted around the fixed axis via a bearing or a bearing.
  • the movement transformation device advantageously comprises a rod connected to an output shaft of the motor, eccentric to and parallel to the output shaft and adapted to swing the blade holder around the fixed axis.
  • the rod set in motion by the output shaft acts alternately on transverse stops of the blade holder to manipulate the rear end of the blade holder back and forth in a direction perpendicular to the wire of the blade and in the plane of the blade. blade.
  • the rod advantageously acts on the transverse stops of the blade holder by means of a bearing centered on the rod and whose outer cage is positioned between said stops to print to the blade holder a continuous sinusoidal oscillating movement during the rotation of the shaft engine.
  • the rod may in particular be constituted by an eccentrically mounted stud on a disk fixed axially on the motor shaft and centered on the motor shaft.
  • the disc is housed in a bearing whose outer cage is received in a frame.
  • the frame can in particular be attached to the engine and extension of the engine.
  • An advantageous point of the invention is that the fixed axis opposes a longitudinal displacement of the blade holder relative to the handle.
  • the knife body can house a rechargeable engine power supply battery.
  • the motor is advantageously controlled by an on-off switch on the knife body, the switch may in particular be a return spring plunger cutting the releasable push motor such as a fugitive pusher.
  • FIG. figure 1 An electric knife made according to the invention is shown in FIG. figure 1 dismounted.
  • a knife body 1 in the form of a handle, provided with a longitudinal axis and a transverse axis.
  • an electric motor 2 for example a DC type motor provided with a rotary output shaft, a battery 14 for supplying the motor, an electronic card 16 for controlling the motor and a switch 15 to start the engine and stop it.
  • a pivoting guard 101 At the front of the knife body is mounted a pivoting guard 101 to mask the blade when the knife is not in use.
  • the knife comprises a blade holder 3, received in the handle and carrying a blade 4.
  • the blade holder has a rear end handle and a front end which extends beyond the blade.
  • a motion transformation device 5 to be described later connects the motor and the blade holder.
  • the blade holder is mounted in the body 1 by means of a bearing 7.
  • the blade holder 3 comprises an axis 61 approximately centered on the blade holder on which is mounted the inner race of the bearing 7.
  • a screw 6 comes to tighten said inner cage and materializes an axis of rotation of the blade holder.
  • the outer race of the bearing 7 is received in the body 1 and, according to this construction, the blade pivots with respect to the body of the knife around the axis represented by the screw 6 at the center of the bearing 7.
  • a housing 132 for receiving the bearing 7 in the body 1 is schematized in figure 3 .
  • the axis 6 around which pivots the blade holder is perpendicular to the blade.
  • a device 5 for continuously rotating the rotating motor of the rotary reciprocating motor of the blade holder is produced.
  • the device 5 of motion transformation comprises a rod 8 connected to the output shaft 9 of the motor by a sleeve 8 'and eccentric with respect to this shaft.
  • the rod extends along an axis parallel to the axis of the output shaft and makes a circular movement around the axis of the output shaft 9.
  • the rod 8, set in motion by the output shaft acts alternately on transverse stops 31a, 31b at the rear end of the blade holder 3 by means of a bearing 10.
  • the transverse stops form a fork around the outer cage 10a of the bearing 10.
  • the inner race of the bearing 10 is centered on the rod, the outer cage 10a is positioned between the stops 31a, 31b to impart to the blade carrier an oscillating movement during the rotation of the motor output shaft 9.
  • the rod could act directly on the stops or the blade holder could include an off-center cam path in which the rod moves.
  • the rotational movement of the rod parallel to itself allows to manipulate the rear end of the blade holder back and forth in a direction perpendicular to the wire of the blade and in the plane of the blade.
  • the rod 8 is secured to a disc 11 extended away from the rod by the sleeve 8 'fixed on the motor shaft 9 and centered on the motor shaft.
  • the embodiment of the stem in the form of a crank is also conceivable within the scope of the invention
  • the sleeve 8 ' is received in the inner race of bearings 12, 12' whose outer cage is embedded in a housing of an annular frame 13, from and other of the frame.
  • the annular frame is itself received in a groove 131 in the body of the knife 1.
  • the frame is fixed to the engine 2 and in extension of the engine which has the advantage of being compact and robust but the frame 13 could also be attached to the body of the knife in the throat.
  • the motor is controlled by an on-off switch 15 on the knife body.
  • This switch can in particular be a return spring pusher cutting the engine released pusher which is a safety measure according to which the engine only starts if the operator presses the button and stops as soon as the operator release the button.
  • a battery charging connector or a removable battery in a hatch housing may be provided.
  • the mounting of the blade on the blade holder is done according to the known techniques but, because the blade is subjected to vibration and oscillating movement, the blade is here held on the blade holder by a screw 17 screwing into a tapping 18 of the blade holder as shown in figure 3 .
  • This figure also shows the blade blade assembly, drive device and motor which are shown from above which allows to view the position of the bearing 10 relative to the stop 31a.
  • the positioning of the bearing 7 which is fixed on the column 61 by means of the fixing screw 6.
  • the engine can have a power of the order of 170 watts a speed of rotation between 18000 and 20000 revolutions per minute which creates oscillations of the blade with a frequency of 300 with 333 Hz.
  • the device is dimensioned to have a movement of the blade from 2 to 3 mm at its end, this gives a maximum speed at the end of the blade of 1.5 to 2m / s.
  • the figure 4 represents from another angle the knife of the figure 1 dismounted.
  • This figure represents the two half-shells 1a, 1b in which are positioned the battery 14 which is inserted through the rear of the knife body, the motor 2, the movement mechanism of the blade and the blade holder.
  • This figure more precisely represents the guard device 101 with its return spring 102 and its locking device 103.
  • the knife body may for example be straight or curved.

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

Description

Domaine de l'inventionField of the invention

La présente invention concerne un couteau électrique c'est à dire un couteau pour lequel une lame est manoeuvrée par un moteur électrique afin d'assister l'opérateur dans son opération de coupe.The present invention relates to an electric knife ie a knife for which a blade is operated by an electric motor to assist the operator in its cutting operation.

La présente invention s'applique en particulier aux couteaux de type "cutter" à lame remplaçable.The present invention applies in particular to cutter type knives with replaceable blade.

Arrière plan technologiqueTechnological background

Un couteau électrique de type "cutter" est connu des documents US2006/053631 A1 et US2010/199501 A1 .An electric knife type "cutter" is known documents US2006 / 053631 A1 and US2010 / 199501 A1 .

Le document US2006/053631 A1 décrit un couteau à lame à dents de scie qui se déplace en va et vient selon un axe longitudinal du couteau sous l'action d'un dispositif à pignon et vis sans fin.The document US2006 / 053631 A1 discloses a sawtooth blade that moves back and forth along a longitudinal axis of the knife under the action of a pinion and worm gear.

US2010/199501 A1 décrit pour sa part un couteau à lame à fil droit qui se déplace en va et vient selon un axe longitudinal du couteau sous l'action d'un dispositif à bague annulaire angulairement désaxée par rapport à un axe moteur et formant un chemin de came pour une fourchette pourvue d'une tige axiale de manoeuvre de la lame. US2010 / 199501 A1 describes for its part a straight-wire blade knife which moves back and forth along a longitudinal axis of the knife under the action of an annular ring device angularly offset from a motor axis and forming a cam path for a fork provided with an axial rod for maneuvering the blade.

Ces réalisations sont basées sur un principe de fonctionnement de va et vient axial qui n'est pas satisfaisant lorsque l'on veut réaliser des opérations de coupe où le fil de la lame est incliné d'un angle inférieur à 90° par rapport à la surface à couper comme par exemple pour couper du carton.These embodiments are based on an operating principle of back and forth axial which is not satisfactory when one wants to perform cutting operations where the wire of the blade is inclined at an angle less than 90 ° relative to the cutting surface such as for cutting cardboard.

Brève description de l'inventionBrief description of the invention

La présente invention a pour objet la réalisation d'un couteau électrique mieux adapté à des opérations de coupe où la lame est inclinée selon un angle aigu, par exemple entre 20° et 70°, par rapport à l'élément à couper.The present invention relates to the realization of an electric knife better suited to cutting operations where the blade is inclined at an acute angle, for example between 20 ° and 70 °, relative to the element to be cut.

Pour ce faire la présente invention propose un couteau électrique, comportant un corps de couteau, formant un manche logeant un moteur électrique, et un porte lame, reçu dans le manche, porteur d'une lame et manoeuvré par le moteur au travers d'un dispositif de transformation de mouvement rotatif du moteur en mouvement alternatif du porte lame ; le corps de couteau comportant un axe fixe perpendiculaire à la lame, sur lequel est monté le porte lame et qui est positionné de manière à ce que le porte lame soit déplacé en rotation et en aller retour autour dudit axe fixe par ledit moteur et imprime à la lame un mouvement d'oscillation.To do this, the present invention provides an electric knife, comprising a knife body, forming a handle housing an electric motor, and a blade holder, received in the handle, carrying a blade and operated by the motor through a rotary motion converting device of the reciprocating motor of the blade holder; the knife body having a fixed axis perpendicular to the blade, on which is mounted the blade holder and which is positioned so that the blade holder is moved in rotation and back around said fixed axis by said motor and prints to the blade a swinging motion.

Dans la présente invention la lame oscille ou vibre dans une direction transversale contrairement à l'art antérieur où la lame se déplace parallèlement à elle même à la manière d'une scie.In the present invention the blade oscillates or vibrates in a transverse direction unlike the prior art where the blade moves parallel to itself in the manner of a saw.

Avantageusement, le porte lame peut être monté autour de l'axe fixe par l'intermédiaire d'un palier ou un roulement.Advantageously, the blade holder can be mounted around the fixed axis via a bearing or a bearing.

Le porte lame comportant une extrémité arrière côté manche et une extrémité avant dont dépasse la lame, le dispositif de transformation de mouvement comporte avantageusement une tige reliée à un arbre de sortie du moteur, excentrée par rapport et parallèle à l'arbre de sortie et adaptée à faire osciller le porte lame autour de l'axe fixe.With the blade holder having a rear end on the handle side and a front end from which the blade protrudes, the movement transformation device advantageously comprises a rod connected to an output shaft of the motor, eccentric to and parallel to the output shaft and adapted to swing the blade holder around the fixed axis.

Préférablement, la tige mise en mouvement par l'arbre de sortie agit alternativement sur des butées transverses du porte lame pour manoeuvrer l'extrémité arrière du porte lame en va et vient dans une direction perpendiculaire au fil de la lame et dans le plan de la lame.Preferably, the rod set in motion by the output shaft acts alternately on transverse stops of the blade holder to manipulate the rear end of the blade holder back and forth in a direction perpendicular to the wire of the blade and in the plane of the blade. blade.

La tige agit avantageusement sur les butées transverses du porte lame par l'intermédiaire d'un roulement centré sur la tige et dont la cage externe est positionnée entre lesdites butées pour imprimer au porte lame un mouvement oscillant sinusoïdal continu pendant la rotation de l'arbre moteur.The rod advantageously acts on the transverse stops of the blade holder by means of a bearing centered on the rod and whose outer cage is positioned between said stops to print to the blade holder a continuous sinusoidal oscillating movement during the rotation of the shaft engine.

La tige peut notamment être constituée par un tenon monté excentré sur un disque fixé axialement sur l'arbre moteur et centré sur l'arbre moteur.The rod may in particular be constituted by an eccentrically mounted stud on a disk fixed axially on the motor shaft and centered on the motor shaft.

Selon un mode de réalisation particulier, le disque est logé dans un roulement dont la cage externe est reçue dans un bâti.According to a particular embodiment, the disc is housed in a bearing whose outer cage is received in a frame.

Le bâti peut notamment être fixé au moteur et en prolongement du moteur.The frame can in particular be attached to the engine and extension of the engine.

Un point avantageux de l'invention est que l'axe fixe s'oppose à un déplacement longitudinal du porte lame par rapport au manche.An advantageous point of the invention is that the fixed axis opposes a longitudinal displacement of the blade holder relative to the handle.

Le corps de couteau peut notamment loger une batterie rechargeable d'alimentation du moteur.In particular, the knife body can house a rechargeable engine power supply battery.

Le moteur est avantageusement commandé par un interrupteur marche arrêt sur le corps de couteau, l'interrupteur pouvant notamment être un poussoir à ressort de rappel coupant le moteur poussoir relâché tel qu'un poussoir fugitif.The motor is advantageously controlled by an on-off switch on the knife body, the switch may in particular be a return spring plunger cutting the releasable push motor such as a fugitive pusher.

Brève description des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de l'invention seront apparents à la lecture de la description qui suit d'un exemple non limitatif de réalisation de l'invention en référence aux dessins qui représentent:

en figure 1
: une vue en perspective d'un couteau électrique selon l'invention et de son mécanisme;
en figure 2
: une vue en éclaté du couteau de la figure 1 ;
en figure 3
: une vue en perspective de l'ensemble moteur porte lame de la figure 1;
en figure 4
: une vue en éclaté du couteau de la figure 1.
Other characteristics and advantages of the invention will become apparent on reading the following description of a nonlimiting exemplary embodiment of the invention with reference to the drawings which represent:
in figure 1
: a perspective view of an electric knife according to the invention and its mechanism;
in figure 2
: an exploded view of the knife of the figure 1 ;
in figure 3
: a perspective view of the motor assembly door blade of the figure 1 ;
in figure 4
: an exploded view of the knife of the figure 1 .

Description détaillée de modes de réalisation de l'inventionDETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

Un couteau électrique réalisé selon l'invention est représenté à la figure 1 démonté.An electric knife made according to the invention is shown in FIG. figure 1 dismounted.

Il comporte un corps de couteau 1 en forme de manche, pourvu d'un axe longitudinal et d'un axe transversal. Dans le corps du couteau est disposé un moteur électrique 2, par exemple un moteur de type courant continu pourvu d'un arbre de sortie rotatif, une batterie 14 d'alimentation du moteur, une carte électronique 16 de commande du moteur et un interrupteur 15 pour mettre le moteur en marche et l'arrêter. A l'avant du corps du couteau est monté un dispositif de garde 101 pivotante pour masquer la lame lorsque le couteau n'est pas utilisé.It comprises a knife body 1 in the form of a handle, provided with a longitudinal axis and a transverse axis. In the body of the knife is disposed an electric motor 2, for example a DC type motor provided with a rotary output shaft, a battery 14 for supplying the motor, an electronic card 16 for controlling the motor and a switch 15 to start the engine and stop it. At the front of the knife body is mounted a pivoting guard 101 to mask the blade when the knife is not in use.

Le couteau comporte un porte lame 3, reçu dans le manche et porteur d'une lame 4. Le porte lame comporte une extrémité arrière côté manche et une extrémité avant dont dépasse la lame.The knife comprises a blade holder 3, received in the handle and carrying a blade 4. The blade holder has a rear end handle and a front end which extends beyond the blade.

Un dispositif de transformation de mouvement 5 qui sera décrit plus loin relie le moteur et le porte lame.A motion transformation device 5 to be described later connects the motor and the blade holder.

Selon la vue éclatée de la figure 2, le porte lame est monté dans le corps 1 par l'intermédiaire d'un roulement 7. Le porte lame 3 comporte un axe 61 approximativement centré sur le porte lame sur lequel se monte la cage intérieure du roulement 7. Une vis 6 vient serrer ladite cage intérieure et matérialise un axe de rotation du porte lame.According to the exploded view of the figure 2 , the blade holder is mounted in the body 1 by means of a bearing 7. The blade holder 3 comprises an axis 61 approximately centered on the blade holder on which is mounted the inner race of the bearing 7. A screw 6 comes to tighten said inner cage and materializes an axis of rotation of the blade holder.

La cage extérieure du roulement 7 est reçue dans le corps 1 et, selon cette construction, la lame pivote par rapport au corps du couteau autour de l'axe matérialisé par la vis 6 au centre du roulement 7. Un logement 132 de réception du roulement 7 dans le corps 1 est schématisé en figure 3. L'axe 6 autour duquel pivote le porte lame est perpendiculaire à la lame.The outer race of the bearing 7 is received in the body 1 and, according to this construction, the blade pivots with respect to the body of the knife around the axis represented by the screw 6 at the center of the bearing 7. A housing 132 for receiving the bearing 7 in the body 1 is schematized in figure 3 . The axis 6 around which pivots the blade holder is perpendicular to the blade.

De retour à la figure 2 et pour permettre la rotation du porte lame en aller retour autour dudit axe fixe et imprimer à la lame un mouvement d'oscillation, un dispositif 5 de transformation de mouvement rotatif continu du moteur en mouvement alternatif rotatif du porte lame est réalisé.Back to the figure 2 and to permit rotation of the blade holder back and forth around said fixed axis and to impart to the blade an oscillating motion, a device 5 for continuously rotating the rotating motor of the rotary reciprocating motor of the blade holder is produced.

Le dispositif 5 de transformation de mouvement comporte une tige 8 reliée à l'arbre 9 de sortie du moteur par un manchon 8' et excentrée par rapport à cet arbre. La tige s'étend selon un axe parallèle à l'axe de l'arbre de sortie et effectue un mouvement circulaire autour de l'axe de l'arbre 9 de sortie.The device 5 of motion transformation comprises a rod 8 connected to the output shaft 9 of the motor by a sleeve 8 'and eccentric with respect to this shaft. The rod extends along an axis parallel to the axis of the output shaft and makes a circular movement around the axis of the output shaft 9.

La tige 8, mise en mouvement par l'arbre de sortie agit alternativement sur des butées transverses 31a, 31b au niveau de l'extrémité arrière du porte lame 3 par l'intermédiaire d'un roulement 10.The rod 8, set in motion by the output shaft acts alternately on transverse stops 31a, 31b at the rear end of the blade holder 3 by means of a bearing 10.

Les butées transverses forment une fourchette autour de la cage externe 10a du roulement 10. La cage interne du roulement 10 est centré sur la tige, la cage externe 10a est positionnée entre les butées 31a, 31b pour imprimer au porte lame un mouvement oscillant pendant la rotation de l'arbre 9 de sortie du moteur. De manière alternative, la tige pourrait agir directement sur les butées ou le porte lame pourrait comporter un chemin de came décentré dans lequel se déplace la tige.The transverse stops form a fork around the outer cage 10a of the bearing 10. The inner race of the bearing 10 is centered on the rod, the outer cage 10a is positioned between the stops 31a, 31b to impart to the blade carrier an oscillating movement during the rotation of the motor output shaft 9. Alternatively, the rod could act directly on the stops or the blade holder could include an off-center cam path in which the rod moves.

Le déplacement rotatif de la tige parallèlement à elle même permet de manoeuvrer l'extrémité arrière du porte lame en va et vient dans une direction perpendiculaire au fil de la lame et dans le plan de la lame.The rotational movement of the rod parallel to itself allows to manipulate the rear end of the blade holder back and forth in a direction perpendicular to the wire of the blade and in the plane of the blade.

Côté moteur, la tige 8 est solidaire d'un disque 11 prolongé à l'opposé de la tige par le manchon 8' fixé sur l'arbre 9 moteur et centré sur l'arbre moteur. La réalisation de la tige sous forme d'une manivelle est aussi envisageable dans le cadre de l'inventionMotor side, the rod 8 is secured to a disc 11 extended away from the rod by the sleeve 8 'fixed on the motor shaft 9 and centered on the motor shaft. The embodiment of the stem in the form of a crank is also conceivable within the scope of the invention

De manière non obligatoire mais avantageuse pour éviter des vibrations et guider correctement la tige, le manchon 8' est reçu dans la cage interne de roulements 12, 12' dont la cage externe est encastrée dans un logement d'un bâti annulaire 13, de part et d'autre du bâti.In a non-obligatory but advantageous way to avoid vibrations and correctly guide the rod, the sleeve 8 'is received in the inner race of bearings 12, 12' whose outer cage is embedded in a housing of an annular frame 13, from and other of the frame.

Le bâti annulaire est lui même reçu dans une gorge 131 dans le corps du couteau 1. Dans l'exemple, le bâti est fixé au moteur 2 et en prolongement du moteur ce qui a l'avantage d'être compact et robuste mais le bâti 13 pourrait aussi être fixé au corps du couteau dans la gorge.The annular frame is itself received in a groove 131 in the body of the knife 1. In the example, the frame is fixed to the engine 2 and in extension of the engine which has the advantage of being compact and robust but the frame 13 could also be attached to the body of the knife in the throat.

Un point important du dispositif est que l'axe fixe 6 s'oppose à un déplacement longitudinal du porte lame 3 par rapport au manche lors du fonctionnement du couteau.An important point of the device is that the fixed axis 6 opposes a longitudinal displacement of the blade holder 3 relative to the handle during operation of the knife.

Le moteur est commandé par un interrupteur marche arrêt 15 sur le corps de couteau. Cet interrupteur peut notamment être un poussoir à ressort de rappel coupant le moteur poussoir relâché ce qui est une mesure de sécurité selon laquelle le moteur ne se met en marche que si l'opérateur appuie sur le bouton et s'arrête dès que l'opérateur relâche le bouton.The motor is controlled by an on-off switch 15 on the knife body. This switch can in particular be a return spring pusher cutting the engine released pusher which is a safety measure according to which the engine only starts if the operator presses the button and stops as soon as the operator release the button.

Un connecteur de charge de la batterie ou une batterie amovible dans un logement à trappe peuvent être prévus.A battery charging connector or a removable battery in a hatch housing may be provided.

Le montage de la lame sur le porte lame se fait selon les techniques connues mais, du fait que la lame subit des vibrations et un mouvement oscillant, la lame est ici maintenue sur le porte lame par une vis 17 se vissant dans un taraudage 18 du porte lame comme représenté en figure 3.The mounting of the blade on the blade holder is done according to the known techniques but, because the blade is subjected to vibration and oscillating movement, the blade is here held on the blade holder by a screw 17 screwing into a tapping 18 of the blade holder as shown in figure 3 .

Cette figure permet aussi de représenter l'ensemble lame porte lame, dispositif d'entraînement et moteur qui sont montrés de dessus ce qui permet de visualiser la position du roulement 10 par rapport à la butée 31a. Le positionnement du roulement 7 qui vient se fixer sur la colonnette 61 au moyen de la vis de fixation 6.This figure also shows the blade blade assembly, drive device and motor which are shown from above which allows to view the position of the bearing 10 relative to the stop 31a. The positioning of the bearing 7 which is fixed on the column 61 by means of the fixing screw 6.

Pour fixer les idées, le moteur peut avoir une puissance de l'ordre de 170 watts une vitesse de rotation entre 18000 et 20000 tours par minute ce qui crée des oscillations de la lame avec une fréquence de 300 à 333 Hz. Comme le dispositif est dimensionné pour avoir un débattement de la lame de 2 à 3 mm à son extrémité, cela donne une vitesse maximale en bout de lame de 1,5 à 2m/s.To fix the ideas, the engine can have a power of the order of 170 watts a speed of rotation between 18000 and 20000 revolutions per minute which creates oscillations of the blade with a frequency of 300 with 333 Hz. As the device is dimensioned to have a movement of the blade from 2 to 3 mm at its end, this gives a maximum speed at the end of the blade of 1.5 to 2m / s.

La figure 4 représente sous un autre angle le couteau de la figure 1 démonté.The figure 4 represents from another angle the knife of the figure 1 dismounted.

Cette figure représente les deux demi coques 1a, 1b dans lesquelles se positionnent la batterie 14 qui s'insère par l'arrière du corps de couteau, le moteur 2, le mécanisme de mise en mouvement de la lame et le porte lame. Cette figure représente plus précisément le dispositif de garde 101 avec son ressort de rappel 102 et son dispositif de blocage 103.This figure represents the two half-shells 1a, 1b in which are positioned the battery 14 which is inserted through the rear of the knife body, the motor 2, the movement mechanism of the blade and the blade holder. This figure more precisely represents the guard device 101 with its return spring 102 and its locking device 103.

L'invention définie par les revendications n'est pas limitée à l'exemple représenté et notamment le corps du couteau peut par exemple être droit ou courbe.The invention defined by the claims is not limited to the example shown and in particular the knife body may for example be straight or curved.

Claims (10)

  1. Electric knife including a knife body (1) forming a handle housing an electric motor (2) and a blade holder (3) received in the handle, carrying a blade (4) and maneuvered by the motor via a device (5) for transforming rotary movement of the motor into alternating movement of the blade holder; characterized in that the knife body includes a fixed shaft (6) perpendicular to the blade, on which the blade holder is mounted and which is positioned so that the blade holder is moved in rotation and to-and-fro relative to said fixed shaft by said motor to impart an oscillatory movement to the blade.
  2. Electric knife according to Claim 1 in which the blade holder (3) is mounted around the fixed shaft (6) by means of a plain bearing or a rolling bearing (7) .
  3. Electric knife according to Claim 1 or 2 in which the blade holder (3) has a rear end (3a) at the handle end and a front end (3b) from which the blade projects, the movement transformation device (5) includes a rod (8) connected to an output shaft (9) of the motor, eccentric relative to and parallel to the output shaft, and the rod (8) moved by the output shaft acts alternately on transverse abutments (31a, 31b) of the blade holder to maneuver the rear end of the blade holder to-and-fro in a direction perpendicular to the edge of the blade and in the plane of the blade.
  4. Electric knife according to Claim 3 in which the rod (8) acts on the transverse abutments (31a, 31b) of the blade holder via a rolling bearing (10) centered on the rod and the outer cage (10a) of which is positioned between said abutments (31a, 31b) to impart to the blade holder a continuous sinusoidal oscillatory movement during rotation of the motor shaft (9).
  5. Electric knife according to Claim 3 or 4 in which the rod (8) consists of a tenon mounted eccentrically on a disk (11) fixed axially to the motor shaft (9) and centered on the motor shaft.
  6. Electric knife according to Claim 5 in which the disk (11) is housed in a rolling bearing (12) the outer cage of which is received in a frame (13) fixed to the motor (2) and in line with the motor.
  7. Electric knife according to any one of the preceding claims in which the fixed shaft (6) opposes a longitudinal movement of the blade holder (3) relative to the handle.
  8. Electric knife according to any one of the preceding claims in which the knife body houses a rechargeable battery (14) for supplying power to the motor.
  9. Electric knife according to any one of the preceding claims in which the motor is controlled by an on-off switch (15) on the knife body.
  10. Electric knife according to Claim 9 in which the switch is a spring-loaded pushbutton de-energizing the motor when the pushbutton is released.
EP17203336.7A 2016-11-29 2017-11-23 Electric knife Active EP3326768B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1661645A FR3059264B1 (en) 2016-11-29 2016-11-29 ELECTRIC KNIFE

Publications (2)

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EP3326768A1 EP3326768A1 (en) 2018-05-30
EP3326768B1 true EP3326768B1 (en) 2019-10-16

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EP17203336.7A Active EP3326768B1 (en) 2016-11-29 2017-11-23 Electric knife

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US (1) US10478978B2 (en)
EP (1) EP3326768B1 (en)
CA (1) CA2986864A1 (en)
FR (1) FR3059264B1 (en)

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Publication number Priority date Publication date Assignee Title
FR3059264B1 (en) * 2016-11-29 2019-05-10 Mure Et Peyrot ELECTRIC KNIFE
US10179415B2 (en) * 2017-03-30 2019-01-15 Ritesafety Products International, Llc Hand cutter with a retractable blade
US11260547B1 (en) * 2018-06-05 2022-03-01 D'Andra Shekem Williams Electric utility knife
CA3188136A1 (en) 2020-06-29 2022-01-06 Seattle Food Geek Applied Sciences, LLC Electronic knife and related systems and methods
US20220040871A1 (en) * 2020-08-05 2022-02-10 214 Central Industries, Inc Handheld powered box cutter
US12076024B2 (en) 2021-07-08 2024-09-03 Mako Surgical Corp. Rotatable blade guard for surgical saw

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US4711030A (en) * 1986-05-05 1987-12-08 Ruston Sr Robert B Variable speed fillet knife
DE3840974A1 (en) * 1988-12-06 1990-06-07 Fein C & E OSCILLATION DRIVE
US5607265A (en) * 1993-11-29 1997-03-04 Lane; Michael S. Reciprocating attachment for hand drills
CN102275171B (en) * 2004-09-14 2014-01-08 阿韦洛公司 Powered utility knife
US20070101580A1 (en) * 2005-09-12 2007-05-10 Avello, Llc, A Massachusetts Limited Liability Corporation Powered Utility Knife
US20100095534A1 (en) * 2006-06-07 2010-04-22 Albert Saiz Cutting Tool Adapter for Rotary Power Tools
US20100199501A1 (en) * 2009-02-11 2010-08-12 Alltrade Tools Llc Power assisted utility knife
US9561569B2 (en) * 2012-12-31 2017-02-07 Robert Bosch Tool Corporation Wobble drive for an oscillating tool
EP3083172A1 (en) * 2013-12-20 2016-10-26 Robert Bosch GmbH Oscillating mechanism for a power tool
FR3059264B1 (en) * 2016-11-29 2019-05-10 Mure Et Peyrot ELECTRIC KNIFE

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Also Published As

Publication number Publication date
CA2986864A1 (en) 2018-05-29
US20180186018A1 (en) 2018-07-05
EP3326768A1 (en) 2018-05-30
FR3059264A1 (en) 2018-06-01
FR3059264B1 (en) 2019-05-10
US10478978B2 (en) 2019-11-19

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