EP2979828B1 - Knife with blade exit controlled by actuating pusher and pinions - Google Patents

Knife with blade exit controlled by actuating pusher and pinions Download PDF

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Publication number
EP2979828B1
EP2979828B1 EP15177637.4A EP15177637A EP2979828B1 EP 2979828 B1 EP2979828 B1 EP 2979828B1 EP 15177637 A EP15177637 A EP 15177637A EP 2979828 B1 EP2979828 B1 EP 2979828B1
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EP
European Patent Office
Prior art keywords
knife
blade
diameter
pinion
blade holder
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EP15177637.4A
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German (de)
French (fr)
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EP2979828A1 (en
Inventor
Jean-Claude Peyrot
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Mure et Peyrot SAS
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Mure et Peyrot SAS
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Publication of EP2979828A1 publication Critical patent/EP2979828A1/en
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    • 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

Definitions

  • the present invention relates to a blade output knife controlled by actuating pusher and pinion adapted in particular to achieve a high reduction of the displacement stroke of the blade.
  • Knik comprising an actuating pusher on which is pressed to remove the blade of a knife body exist.
  • the Applicant has notably filed several patent applications for push-action knives that are either rotational or transversely moving with respect to a knife body offering sufficient gearing to maintain a reasonable pushing stroke while allowing a blade exit. sufficient for efficient use of the knife without requiring too much effort from the operator.
  • the document EP1 946 897 A1 describes in particular a pusher knife having a blade holder which moves under the action of a rod device driven by a pusher.
  • the document EP 1 985 417 A1 provides a first cam path in a trigger pusher, a second cam path in an operating pusher of a blade holder, and a rotary lever provided with two pins each engaging in one of said cam paths and whose distance by relative to an axis of rotation of the rotary lever achieves the reduction allowing the output of the blade to a greater distance than the stroke of the trigger pusher.
  • the document DE 20 2004 011913 U1 discloses a knife having a knife body provided with a longitudinal direction, enclosing a blade integral with a blade holder, the blade and the blade holder being adapted to move in the longitudinal direction between a retracted position of the blade in the knife body and an output position of the blade, the knife having an actuating pusher movable relative to the knife body in a direction generally transverse to the knife body and a blade holder driving device by means of the pusher for which the driving device is a gear device.
  • the present invention proposes to improve this knife by making its manufacture easier.
  • the present invention proposes a knife comprising a knife body provided with a longitudinal direction, enclosing a blade integral with a blade holder, the blade and the blade holder being adapted to move in the longitudinal direction between a position of retracting the blade into the knife body and an output position of the blade, the knife having an actuating pusher movable relative to the knife body in a direction generally transverse to the knife body and a door driving device blade by means of the pusher, for which the drive device is a gear device, the gears being assembled between arms of a rear closure element of the knife body.
  • the driving device may in particular comprise travel path multiplication means between the pusher and the blade holder.
  • the gear device comprises a gear cascade disposed so as to transfer a force applied to the pusher on the rear of the knife body towards the front of the knife body.
  • the actuating pusher comprises an input rack oriented in the operating direction of the pusher transversely to the longitudinal direction of the knife body.
  • the input rack meshes advantageously with a first pinion of a first diameter and secured through its axis of rotation of a first pinion of transfer of a second diameter greater than the first diameter.
  • the blade holder advantageously comprises an output rack, the latter preferably being oriented in the longitudinal direction of the output of the blade.
  • the output rack meshes with a last pinion of a last diameter.
  • the last pinion is secured through its axis of rotation, a transfer receiving gear diameter less than the last diameter.
  • the diameter of the transfer receiving pinion and the diameter of the first pinion are equal and / or the diameter of the first pinion of transfer and the diameter of the last pinion are equal, the ratio of the second diameter on the first pinion diameter being greater than 2.
  • the cascade of gears is advantageously positioned so as to transform a movement of the input rack in said transverse direction in a movement of the blade holder in said longitudinal direction.
  • the pusher is a rotary pusher having an axis of rotation on the front blade exit side of the knife body, the rack being disposed towards the rear of the knife body on a circular arc centered on said axis of rotation and oriented towards the axis.
  • the blade holder is advantageously guided longitudinally in the knife body, the output rack skirting for example a rim of said blade holder.
  • the blade holder is mounted on the closure member, a return spring being disposed between the blade holder and said closure member.
  • FIG. 1 A particular non-limiting embodiment of a knife according to the invention is described in the accompanying figures and is shown in an external general view.
  • FIG 1 the Figures 2 to 5 representing details of this knife, the figure 6 representing a burst of the knife.
  • the knife comprises a knife body 1 and an actuating pusher 4.
  • the actuating pusher 4 is articulated on the body at an axis 12 at the front of the pusher towards the front of the body.
  • the pusher enters the body by rotation about this axis to remove the blade 2.
  • the blade holder 3 is biased towards the retracted position of the blade by a spring 15 which is fixed on the blade holder 3 and on a rear closure member 16 of the knife body as shown in FIG. figure 4 .
  • the rack 10 of the actuating pusher is fixed on a rear portion of the actuating pusher 4 and its curved toothing has as a center of curvature the axis 12 of rotation of said pusher.
  • the rack is here arranged on an arc to have a movement generally oriented in a direction B transverse to the body of the knife.
  • the example shown relates to a rotary plunger knife but that the invention can also be applied to a knife comprising a pusher actuating device moving in a translational movement transverse to the knife body.
  • the rack will be straight and will move on a straight according to the transverse movement.
  • the rack 11 of the blade holder is parallel to the outlet direction of the blade in the longitudinal direction A.
  • the device of the invention is in the first place a driving device of the blade holder by means of the actuating pusher 4 which transforms the transverse movement of the actuating pusher into a longitudinal movement of the blade holder in direction A.
  • the transformation device is a gear or gear device which makes it possible to produce a compact and fine knife and allows either to amplify the stroke of the pusher to obtain a large blade output with a small movement of the actuating means or to reduce the force to exert on the actuating means for a given displacement according to a gear ratio offered by the gears.
  • the input rack 10 meshes with a first pinion 5 of a first diameter d1.
  • the first pinion is secured through its axis of rotation 13 of a first transfer gear 6 of a second diameter d2 greater than the first diameter d1.
  • the output rack 11 meshes for its part with a last pinion 9 of a last diameter d4 secured, through its axis of rotation 14, a transfer receiving pinion 8 of diameter d3 smaller than the last diameter, this transfer pinion being represented on the figure 3 view of the left side of knife without the body of the knife.
  • the diameter d3 of the transfer receiving pinion 8 and the diameter d1 of the first pinion 5 are equal.
  • the diameter d2 of the first transfer gear and the diameter d4 of the last gear are equal.
  • the ratio of the second diameter d2 to the first diameter d1 causes the output stroke to be multiplied relative to the stroke of the pusher.
  • the diameters of the pinions, or the ratio of the number of teeth are chosen so that the displacement ratio is greater than 2, the driving device thus comprising means for multiplying the travel path between the pusher and the blade holder. .
  • the example shown is a knife with a tooth ratio of 2.7 (27/10) and an actuator 4 with a length between axis of rotation and free end of 85 mm.
  • This configuration makes it possible to obtain an exit stroke of the blade of 5 cm for a displacement of the actuating pusher of approximately 11 mm without the force to be applied to the actuating pusher being too important for the operator.
  • Another aspect of the invention is the displacement of the point of action of the forces to allow to accept in the knife an output rack 11 of sufficient length to obtain the stroke of the blade without too lengthen the knife.
  • the gear device comprises a cascade of gears 5, 6, 7, 8, 9 arranged so as to transfer a force applied to the pusher on the rear of the knife body to the before the body of the knife which gives more amplitude to the blade holder in its displacement in the body of the knife.
  • the sprocket cascade is positioned so as to transform a movement of the inlet rack 10 in said transverse direction B in a movement of the blade holder 3 in said longitudinal direction A and to transfer the point of application of force on the door blade towards the front of the knife while the point of application of force of the pusher is on the back of the knife.
  • To do this in the gears cascade 5 to 9 is the intermediate gear 7 driven by the first transfer pinion 6 and driving the transfer receiving gear 8.
  • the pinion 7 is mainly used to transfer the support force on the pusher forward. It is in this context possible to increase the number of intermediate gears to further remove the gears of entry and exit of the cascade.
  • the blade holder is guided longitudinally in the knife body and the output rack 11 runs along a rim 31 of said blade holder 3.
  • the rear closure member 16 of the knife body comprises arms 17 extending towards the front of the knife, the arms forming two branches of a stirrup.
  • the arms are provided with holes 18, 19, 20 for receiving the pins 13, 14, 21 of the pinions which are assembled with the closure element 16.
  • the figure 5 represents a detail of the rack 10 of the pusher 4 which makes it possible to present a pusher locking device in the retracted position of the blade.
  • the locking device comprises a sliding button 27 moving a finger 25 between a locking position of the pusher where the finger rests on a shoulder 26 on the rack 10 and a release position of the pusher for which the finger is moved back to n ' be more in touch with the shoulder.
  • the pinions 5, 6, 7, 8, 9 assembled on their axes are mounted on the rear closure element 16 between the arms 17 of the stirrup 16 with their pins inserted into the holes 18, 19, 20 carried by these arms.
  • the blade holder 3 is disposed on the stirrup 16 with its rack engaged on the pinion 9, the lower part of the blade holder being placed on the axes of the other gears.
  • the return spring 15 of the blade holder 4 is then mounted between the blade holder and the bracket 16 hooked to the latter.
  • the stirrup can then be inserted into the body of the knife 1.
  • the rear of the actuating pusher 4 is then inserted into the body so that its rear rack 10 meshes with its pinion.
  • the pusher is then positioned so that its housing 41 for receiving the axis of rotation 12 is aligned with the corresponding housing 42 of the knife body.
  • the axis 12 is installed in the body of the knife by inserting it in the housings 41, 42.
  • the blade change button 22 and the button 27 of the sliding blocking device are arranged in openings of the knife body opposite their working position and the blade 2, here mounted in a sleeve 3a, is mounted on the blade holder.
  • the pinion device of the invention makes it possible to produce a compact knife with a large reduction in blade stroke but can also replace knuckle rod devices known for the fact that the actuating pusher is rotational or linearly displaceable, as shown in FIG. document EP1 964 652 A1 and be used for an automatic blade retraction knife as for example described in the document EP 1 985 417 A1 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)

Description

Domaine de l'inventionField of the invention

La présente invention concerne un couteau à sortie de lame commandée par poussoir d'actionnement et pignons adapté notamment à réaliser une forte démultiplication de la course de déplacement de la lame.The present invention relates to a blade output knife controlled by actuating pusher and pinion adapted in particular to achieve a high reduction of the displacement stroke of the blade.

Arrière plan technologiqueTechnological background

De nombreuses réalisations de couteaux comportant un poussoir d'actionnement sur lequel on appuie pour faire sortir la lame d'un corps de couteau existent.Many embodiments of knives comprising an actuating pusher on which is pressed to remove the blade of a knife body exist.

La demanderesse a notamment déposé plusieurs demandes de brevet pour des couteaux à poussoir d'actionnement soit à mouvement rotatif soit à mouvement transversal par rapport à un corps du couteau offrant une démultiplication suffisante pour conserver une course du poussoir raisonnable tout en permettant une sortie de lame suffisante pour une utilisation efficace du couteau sans nécessiter un effort trop important de l'opérateur.The Applicant has notably filed several patent applications for push-action knives that are either rotational or transversely moving with respect to a knife body offering sufficient gearing to maintain a reasonable pushing stroke while allowing a blade exit. sufficient for efficient use of the knife without requiring too much effort from the operator.

Le document EP1 946 897 A1 décrit notamment un couteau à poussoir comportant un porte lame qui se déplace sous l'action d'un dispositif à biellettes entraîné par un poussoir.The document EP1 946 897 A1 describes in particular a pusher knife having a blade holder which moves under the action of a rod device driven by a pusher.

Le document EP 1 985 417 A1 prévoit un premier chemin de came dans un poussoir gâchette, un second chemin de came dans un poussoir de manoeuvre d'un porte lame, et un levier rotatif pourvu de deux pions s'engageant chacun dans un desdits chemins de came et dont la distance par rapport à un axe de rotation du levier rotatif réalise la démultiplication permettant la sortie de la lame sur une distance plus importante que la course du poussoir gâchette.The document EP 1 985 417 A1 provides a first cam path in a trigger pusher, a second cam path in an operating pusher of a blade holder, and a rotary lever provided with two pins each engaging in one of said cam paths and whose distance by relative to an axis of rotation of the rotary lever achieves the reduction allowing the output of the blade to a greater distance than the stroke of the trigger pusher.

Ces réalisations sont satisfaisantes lorsque la course de sortie de la lame reste de l'ordre de 1 à 2 cm. Elles ne sont toutefois plus adaptées si la course de sortie de la lame doit être beaucoup plus grande. Notamment, au delà de 4 cm de course de sortie, soit la course du poussoir d'actionnement reste très importante et celui-ci est difficile à manoeuvrer soit la force à appliquer pour sortir la lame est trop grande ce qui occasionne une fatigue rapide de l'opérateur.These achievements are satisfactory when the output stroke of the blade remains of the order of 1 to 2 cm. However, they are no longer suitable if the exit stroke of the blade must be much greater. In particular, beyond 4 cm of output stroke, the stroke of the actuating pusher remains very important and it is difficult to maneuver or the force to be applied to remove the blade is too large which causes a rapid fatigue of the operator.

Le document DE 20 2004 011913 U1 décrit un couteau comportant un corps de couteau pourvu d'une direction longitudinale, renfermant une lame solidaire d'un porte lame, la lame et le porte lame étant adaptés à se déplacer selon la direction longitudinale entre une position de rentrée de la lame dans le corps du couteau et une position de sortie de la lame, le couteau comportant un poussoir d'actionnement mobile par rapport au corps du couteau dans une direction globalement transversale au corps du couteau et un dispositif d'entraînement du porte lame au moyen du poussoir pour lequel le dispositif d'entraînement est un dispositif à pignons.The document DE 20 2004 011913 U1 discloses a knife having a knife body provided with a longitudinal direction, enclosing a blade integral with a blade holder, the blade and the blade holder being adapted to move in the longitudinal direction between a retracted position of the blade in the knife body and an output position of the blade, the knife having an actuating pusher movable relative to the knife body in a direction generally transverse to the knife body and a blade holder driving device by means of the pusher for which the driving device is a gear device.

Brève description de l'inventionBrief description of the invention

La présente invention propose de perfectionner ce couteau en rendant sa fabrication plus aisé. Pour ce faire la présente invention propose un couteau comportant un corps de couteau pourvu d'une direction longitudinale, renfermant une lame solidaire d'un porte lame , la lame et le porte lame étant adaptés à se déplacer selon la direction longitudinale entre une position de rentrée de la lame dans le corps du couteau et une position de sortie de la lame, le couteau comportant un poussoir d'actionnement mobile par rapport au corps du couteau dans une direction globalement transversale au corps du couteau et un dispositif d'entraînement du porte lame au moyen du poussoir, pour lequel le dispositif d'entraînement est un dispositif à pignons, les pignons étant assemblés entre des bras d'un élément de fermeture arrière du corps du couteau.The present invention proposes to improve this knife by making its manufacture easier. To this end, the present invention proposes a knife comprising a knife body provided with a longitudinal direction, enclosing a blade integral with a blade holder, the blade and the blade holder being adapted to move in the longitudinal direction between a position of retracting the blade into the knife body and an output position of the blade, the knife having an actuating pusher movable relative to the knife body in a direction generally transverse to the knife body and a door driving device blade by means of the pusher, for which the drive device is a gear device, the gears being assembled between arms of a rear closure element of the knife body.

Le dispositif d'entraînement peut notamment comprendre des moyens de multiplication de course de déplacement entre le poussoir et le porte lame.The driving device may in particular comprise travel path multiplication means between the pusher and the blade holder.

Selon un mode de réalisation préférentiel, le dispositif à pignons comporte une cascade de pignons disposée en sorte de transférer un effort appliqué au poussoir sur l'arrière du corps du couteau vers l'avant du corps du couteau.According to a preferred embodiment, the gear device comprises a gear cascade disposed so as to transfer a force applied to the pusher on the rear of the knife body towards the front of the knife body.

Selon un mode de réalisation particulier, le poussoir d'actionnement comporte une crémaillère d'entrée orientée dans la direction de manoeuvre du poussoir transversalement à la direction longitudinale du corps du couteau.According to a particular embodiment, the actuating pusher comprises an input rack oriented in the operating direction of the pusher transversely to the longitudinal direction of the knife body.

La crémaillère d'entrée s'engrène avantageusement sur un premier pignon d'un premier diamètre et solidaire au travers de son axe de rotation d'un premier pignon de transfert d'un deuxième diamètre supérieur au premier diamètre.The input rack meshes advantageously with a first pinion of a first diameter and secured through its axis of rotation of a first pinion of transfer of a second diameter greater than the first diameter.

Le porte lame comporte avantageusement une crémaillère de sortie, cette dernière étant préférablement orientée dans la direction longitudinale de sortie de la lame.The blade holder advantageously comprises an output rack, the latter preferably being oriented in the longitudinal direction of the output of the blade.

Selon un mode de réalisation particulier, la crémaillère de sortie s'engrène avec un dernier pignon d'un dernier diamètre.According to a particular embodiment, the output rack meshes with a last pinion of a last diameter.

Avantageusement, le dernier pignon est solidaire au travers de son axe de rotation, d'un pignon de réception de transfert de diamètre inférieur au dernier diamètre.Advantageously, the last pinion is secured through its axis of rotation, a transfer receiving gear diameter less than the last diameter.

Selon un mode de réalisation particulier, le diamètre du pignon de réception de transfert et le diamètre du premier pignon sont égaux et/ou le diamètre du premier pignon de transfert et le diamètre du dernier pignon sont égaux, le rapport du deuxième diamètre sur le premier diamètre étant supérieur à 2.According to a particular embodiment, the diameter of the transfer receiving pinion and the diameter of the first pinion are equal and / or the diameter of the first pinion of transfer and the diameter of the last pinion are equal, the ratio of the second diameter on the first pinion diameter being greater than 2.

La cascade de pignons est avantageusement positionnée en sorte de transformer un mouvement de la crémaillère d'entrée selon ladite direction transversale en un mouvement du porte lame selon ladite direction longitudinale.The cascade of gears is advantageously positioned so as to transform a movement of the input rack in said transverse direction in a movement of the blade holder in said longitudinal direction.

Selon un mode de réalisation particulier, le poussoir est un poussoir rotatif comportant un axe de rotation sur le côté avant de sortie de lame du corps du couteau, la crémaillère étant disposée vers l'arrière du corps du couteau sur un arc de cercle centré sur ledit axe de rotation et orientée vers l'axe.According to a particular embodiment, the pusher is a rotary pusher having an axis of rotation on the front blade exit side of the knife body, the rack being disposed towards the rear of the knife body on a circular arc centered on said axis of rotation and oriented towards the axis.

Le porte lame est avantageusement guidé longitudinalement dans le corps du couteau, la crémaillère de sortie longeant par exemple un rebord dudit porte lame.The blade holder is advantageously guided longitudinally in the knife body, the output rack skirting for example a rim of said blade holder.

Avantageusement, le porte lame se monte sur l'élément de fermeture, un ressort de rappel étant disposé entre le porte lame et ledit élément de fermeture.Advantageously, the blade holder is mounted on the closure member, a return spring being disposed between the blade holder and said closure member.

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 : un couteau selon l'invention en vue extérieure perspective;
  • En figure 2: une vue du côté droit du couteau corps de couteau retiré;
  • En figure 3: une vue du côté gauche du couteau corps de couteau retiré;
  • En figure 4: une vue du côté gauche du couteau corps de couteau retiré avec support d'engrenages;
  • En figure 5: une vue en perspective d'un détail d'un entraînement entre une crémaillère de poussoir d'actionnement et une partie de cascade d'engrenages;
  • En figure 6: 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 knife according to the invention in perspective external view;
  • In figure 2 : a view of the right side of the knife body removed;
  • In figure 3 : a left side view of the knife body removed;
  • In figure 4 : a left side view of the knife body removed with gear holder;
  • In figure 5 : A perspective view of a detail of a drive between an actuator push rack and a gear cascade portion;
  • In figure 6 : 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 mode de réalisation particulier non limitatif d'un couteau selon l'invention est décrit dans les figures annexées et est représenté en vue générale externe en figure 1, les figures 2 à 5 représentant des détails de ce couteau, la figure 6 représentant un éclaté du couteau.A particular non-limiting embodiment of a knife according to the invention is described in the accompanying figures and is shown in an external general view. figure 1 , the Figures 2 to 5 representing details of this knife, the figure 6 representing a burst of the knife.

Selon la figure 1 , le couteau comporte un corps de couteau 1 et un poussoir d'actionnement 4.According to figure 1 the knife comprises a knife body 1 and an actuating pusher 4.

Le poussoir d'actionnement 4 s'articule sur le corps au niveau d'un axe 12 à l'avant du poussoir vers l'avant du corps. Le poussoir rentre dans le corps par rotation autour de cet axe pour sortir la lame 2. La lame 2 représentée en pointillés sort de l'avant du corps du couteau dans une direction longitudinale A.The actuating pusher 4 is articulated on the body at an axis 12 at the front of the pusher towards the front of the body. The pusher enters the body by rotation about this axis to remove the blade 2. The blade 2 shown in dashed out of the front of the knife body in a longitudinal direction A.

Sur la figure 2 vue côté droit du couteau sans le corps de couteau sont représentés plus particulièrement le poussoir d'actionnement 4, la lame 2, qui est selon l'exemple une lame dentée sans que ce soit limitatif, et un porte lame 3 sur lequel est fixée la lame 2.On the figure 2 right side view of the knife without the knife body are represented more particularly the actuating pusher 4, the blade 2, which is according to the example a toothed blade without this being limiting, and a blade holder 3 on which is fixed the blade 2.

Le porte lame 3 est rappelé vers la position de rentrée de la lame par un ressort 15 qui se fixe sur le porte lame 3 et sur un élément 16 de fermeture arrière du corps du couteau comme représenté en figure 4 .The blade holder 3 is biased towards the retracted position of the blade by a spring 15 which is fixed on the blade holder 3 and on a rear closure member 16 of the knife body as shown in FIG. figure 4 .

Toujours sur la figure 2 sont représentées une crémaillère 10 solidaire du poussoir d'actionnement et une crémaillère 11 du porte lame.Always on the figure 2 are shown a rack 10 integral with the actuating pusher and a rack 11 of the blade holder.

La crémaillère 10 du poussoir d'actionnement est fixée sur une partie arrière du poussoir d'actionnement 4 et sa denture courbe a comme centre de courbure l'axe 12 de rotation dudit poussoir. La crémaillère est ici disposée sur un arc de cercle pour avoir un mouvement globalement orienté dans une direction B transversale au corps du couteau.The rack 10 of the actuating pusher is fixed on a rear portion of the actuating pusher 4 and its curved toothing has as a center of curvature the axis 12 of rotation of said pusher. The rack is here arranged on an arc to have a movement generally oriented in a direction B transverse to the body of the knife.

Il est à noter que l'exemple représenté concerne un couteau à poussoir rotatif mais que l'invention peut aussi s'appliquer à un couteau comportant un dispositif d'actionnement à poussoir se déplaçant selon un mouvement de translation transversale au corps du couteau. Dans un tel cas la crémaillère sera droite et se déplacera sur une droite selon le mouvement transversal.It should be noted that the example shown relates to a rotary plunger knife but that the invention can also be applied to a knife comprising a pusher actuating device moving in a translational movement transverse to the knife body. In such a case the rack will be straight and will move on a straight according to the transverse movement.

Dans ce cadre, la terminologie globalement transversal ou généralement transversal est utiliser pour englober les deux types de poussoirs.In this context, globally transversal or generally transversal terminology is used to encompass both types of pushers.

La crémaillère 11 du porte lame est parallèle à la direction de sortie de la lame selon la direction longitudinale A.The rack 11 of the blade holder is parallel to the outlet direction of the blade in the longitudinal direction A.

Le dispositif de l'invention est en premier lieu un dispositif d'entraînement du porte lame au moyen du poussoir d'actionnement 4 qui transforme le mouvement transversal du poussoir d'actionnement en un mouvement longitudinal du porte lame selon la direction A.The device of the invention is in the first place a driving device of the blade holder by means of the actuating pusher 4 which transforms the transverse movement of the actuating pusher into a longitudinal movement of the blade holder in direction A.

Le dispositif de transformation est un dispositif à pignons ou engrenages qui permet de réaliser un couteau compact et fin et permet soit d'amplifier la course du poussoir pour obtenir une sortie de lame importante avec un faible mouvement du moyen d'actionnement soit de réduire la force à exercer sur le moyen d'actionnement pour un déplacement donné en fonction d'un rapport de démultiplication offert par les pignons.The transformation device is a gear or gear device which makes it possible to produce a compact and fine knife and allows either to amplify the stroke of the pusher to obtain a large blade output with a small movement of the actuating means or to reduce the force to exert on the actuating means for a given displacement according to a gear ratio offered by the gears.

Selon la figure 2, la crémaillère d'entrée 10 s'engrène sur un premier pignon 5 d'un premier diamètre d1. Le premier pignon est solidaire au travers de son axe de rotation 13 d'un premier pignon de transfert 6 d'un deuxième diamètre d2 supérieur au premier diamètre d1.According to figure 2 , the input rack 10 meshes with a first pinion 5 of a first diameter d1. The first pinion is secured through its axis of rotation 13 of a first transfer gear 6 of a second diameter d2 greater than the first diameter d1.

On notera qu'au lieu de la notion de diamètre utilisée, il serait possible de considérer les rapports de nombres de dents des pignons.It will be noted that instead of the notion of diameter used, it would be possible to consider the ratios of tooth numbers of the gears.

La crémaillère de sortie 11 s'engrène pour sa part avec un dernier pignon 9 d'un dernier diamètre d4 solidaire, au travers de son axe de rotation 14, d'un pignon de réception de transfert 8 de diamètre d3 inférieur au dernier diamètre, ce pignon de transfert étant représenté sur la figure 3 vue du côté gauche de couteau sans le corps du couteau.The output rack 11 meshes for its part with a last pinion 9 of a last diameter d4 secured, through its axis of rotation 14, a transfer receiving pinion 8 of diameter d3 smaller than the last diameter, this transfer pinion being represented on the figure 3 view of the left side of knife without the body of the knife.

Dans l'exemple représenté, le diamètre d3 du pignon de réception de transfert 8 et le diamètre d1 du premier pignon 5 sont égaux.In the example shown, the diameter d3 of the transfer receiving pinion 8 and the diameter d1 of the first pinion 5 are equal.

Par ailleurs, le diamètre d2 du premier pignon de transfert et le diamètre d4 du dernier pignon sont égaux.Moreover, the diameter d2 of the first transfer gear and the diameter d4 of the last gear are equal.

Dans cette configuration, le rapport du deuxième diamètre d2 sur le premier diamètre d1 fait que la course de sortie est multipliée par rapport à la course du poussoir. Par exemple les diamètres des pignons, ou le rapport des nombres de dents, sont choisis pour que le rapport de déplacement soit supérieur à 2, le dispositif d'entraînement comprenant ainsi des moyens de multiplication de course de déplacement entre le poussoir et le porte lame.In this configuration, the ratio of the second diameter d2 to the first diameter d1 causes the output stroke to be multiplied relative to the stroke of the pusher. For example, the diameters of the pinions, or the ratio of the number of teeth, are chosen so that the displacement ratio is greater than 2, the driving device thus comprising means for multiplying the travel path between the pusher and the blade holder. .

L'exemple représenté est un couteau avec un rapport de dents de 2,7 (27/10) et un poussoir d'actionnement 4 d'une longueur entre axe de rotation et extrémité libre de 85 mm. Cette configuration permet d'obtenir une course de sortie de la lame de 5 cm pour un déplacement du poussoir d'actionnement d'environ 11 mm sans que l'effort à appliquer au poussoir d'actionnement ne soit trop important pour l'opérateur.The example shown is a knife with a tooth ratio of 2.7 (27/10) and an actuator 4 with a length between axis of rotation and free end of 85 mm. This configuration makes it possible to obtain an exit stroke of the blade of 5 cm for a displacement of the actuating pusher of approximately 11 mm without the force to be applied to the actuating pusher being too important for the operator.

Un autre aspect de l'invention est le déplacement du point d'action des efforts pour permettre d'accepter dans le couteau une crémaillère de sortie 11 de longueur suffisante pour obtenir la course de la lame sans trop allonger le couteau.Another aspect of the invention is the displacement of the point of action of the forces to allow to accept in the knife an output rack 11 of sufficient length to obtain the stroke of the blade without too lengthen the knife.

Pour permettre une grande course de sortie de la lame, le dispositif à engrenages comprend une cascade de pignons 5, 6, 7, 8, 9 disposée en sorte de transférer un effort appliqué au poussoir sur l'arrière du corps du couteau vers l'avant du corps du couteau ce qui donne plus d'amplitude au porte lame dans son déplacement dans le corps du couteau.To allow a large output stroke of the blade, the gear device comprises a cascade of gears 5, 6, 7, 8, 9 arranged so as to transfer a force applied to the pusher on the rear of the knife body to the before the body of the knife which gives more amplitude to the blade holder in its displacement in the body of the knife.

La cascade de pignons est positionnée en sorte de transformer un mouvement de la crémaillère d'entrée 10 selon ladite direction transversale B en un mouvement du porte lame 3 selon ladite direction longitudinale A et de transférer le point d'application d'effort sur le porte lame vers l'avant du couteau alors que le point d'application d'effort du poussoir est sur l'arrière du couteau. Pour ce faire dans la cascade de pignons 5 à 9 se trouve le pignon intermédiaire 7 entraîné par le premier pignon de transfert 6 et entraînant le pignon de réception de transfert 8. Le pignon 7 sert principalement à transférer l'effort d'appui sur le poussoir vers l'avant. Il est dans ce cadre envisageable d'accroître le nombre de pignons intermédiaires pour écarter encore plus les pignons d'entrée et de sortie de la cascade.The sprocket cascade is positioned so as to transform a movement of the inlet rack 10 in said transverse direction B in a movement of the blade holder 3 in said longitudinal direction A and to transfer the point of application of force on the door blade towards the front of the knife while the point of application of force of the pusher is on the back of the knife. To do this in the gears cascade 5 to 9 is the intermediate gear 7 driven by the first transfer pinion 6 and driving the transfer receiving gear 8. The pinion 7 is mainly used to transfer the support force on the pusher forward. It is in this context possible to increase the number of intermediate gears to further remove the gears of entry and exit of the cascade.

Le porte lame est guidé longitudinalement dans le corps du couteau et la crémaillère de sortie 11 longe un rebord 31 dudit porte lame 3.The blade holder is guided longitudinally in the knife body and the output rack 11 runs along a rim 31 of said blade holder 3.

Selon la figure 4, l'élément 16 de fermeture arrière du corps du couteau comporte des bras 17 s'étendant vers l'avant du couteau, les bras formant deux branches d'un étrier.According to figure 4 , the rear closure member 16 of the knife body comprises arms 17 extending towards the front of the knife, the arms forming two branches of a stirrup.

Les bras sont pourvus de trous 18, 19, 20 de réception des axes 13, 14, 21 des pignons qui sont assemblé avec l'élément de fermeture 16.The arms are provided with holes 18, 19, 20 for receiving the pins 13, 14, 21 of the pinions which are assembled with the closure element 16.

La figure 5 représente un détail de la crémaillère 10 du poussoir 4 qui permet de présenter un dispositif de blocage du poussoir en position de rentrée de la lame. Le dispositif de blocage comporte un bouton coulissant 27 déplaçant un doigt 25 entre une position de blocage du poussoir où le doigt s'appuie sur un épaulement 26 sur la crémaillère 10 et une position de libération du poussoir pour laquelle le doigt est reculé pour n'être plus en prise avec l'épaulement.The figure 5 represents a detail of the rack 10 of the pusher 4 which makes it possible to present a pusher locking device in the retracted position of the blade. The locking device comprises a sliding button 27 moving a finger 25 between a locking position of the pusher where the finger rests on a shoulder 26 on the rack 10 and a release position of the pusher for which the finger is moved back to n ' be more in touch with the shoulder.

L'assemblage du couteau est décrit en référence à la figure 6.The assembly of the knife is described with reference to the figure 6 .

En premier lieu, les pignons 5, 6, 7, 8, 9 assemblés sur leurs axes sont montés sur l'élément de fermeture arrière 16 entre les bras 17 de l'étrier 16 avec leurs axes insérés dans les trous 18, 19, 20 portés par ces bras.Firstly, the pinions 5, 6, 7, 8, 9 assembled on their axes are mounted on the rear closure element 16 between the arms 17 of the stirrup 16 with their pins inserted into the holes 18, 19, 20 carried by these arms.

Ensuite, le porte lame 3 est disposé sur l'étrier 16 avec sa crémaillère engagée sur le pignon 9, la partie basse du porte lame étant posée sur les axes des autres pignons. Le ressort 15 de rappel du porte lame 4 est alors monté entre le porte lame et l'étrier 16 accroché à ces derniers. L'étrier peut alors être inséré dans le corps du couteau 1.Then, the blade holder 3 is disposed on the stirrup 16 with its rack engaged on the pinion 9, the lower part of the blade holder being placed on the axes of the other gears. The return spring 15 of the blade holder 4 is then mounted between the blade holder and the bracket 16 hooked to the latter. The stirrup can then be inserted into the body of the knife 1.

L'arrière du poussoir d'actionnement 4 alors est inséré dans le corps de sorte que sa crémaillère arrière 10 s'engrène sur son pignon. Le poussoir est ensuite positionné pour que son logement 41 de réception de l'axe de rotation 12 soit aligné avec les logements correspondants 42 du le corps du couteau. L'axe 12 est installé dans le corps du couteau en l'insérant dans les logements 41, 42.The rear of the actuating pusher 4 is then inserted into the body so that its rear rack 10 meshes with its pinion. The pusher is then positioned so that its housing 41 for receiving the axis of rotation 12 is aligned with the corresponding housing 42 of the knife body. The axis 12 is installed in the body of the knife by inserting it in the housings 41, 42.

Pour terminer le couteau, le bouton de changement de lame 22 et le bouton 27 du dispositif de blocage coulissant sont disposé dans des ouvertures du corps du couteau en regard de leur position de travail et la lame 2, ici montée dans un fourreau 3a, est montée sur le porte lame.To end the knife, the blade change button 22 and the button 27 of the sliding blocking device are arranged in openings of the knife body opposite their working position and the blade 2, here mounted in a sleeve 3a, is mounted on the blade holder.

Le dispositif à pignons de l'invention permet de réaliser un couteau compact à grande démultiplication de course de lame mais peut aussi remplacer des dispositifs à bielles de couteaux connus, que le poussoir d'actionnement soit à déplacement rotatif ou linéaire, comme représenté dans le document EP1 964 652 A1 et être utilisé pour un couteau à rétraction de lame automatique comme par exemple décrit dans le document EP 1 985 417 A1 .The pinion device of the invention makes it possible to produce a compact knife with a large reduction in blade stroke but can also replace knuckle rod devices known for the fact that the actuating pusher is rotational or linearly displaceable, as shown in FIG. document EP1 964 652 A1 and be used for an automatic blade retraction knife as for example described in the document EP 1 985 417 A1 .

Claims (11)

  1. Knife comprising a knife body (1) provided with a longitudinal direction (A), enclosing a blade (2) secured to a blade holder (3), the blade and blade holder being able to move in the longitudinal direction between a position in which the blade is retracted inside the knife body and a position in which the blade is deployed, the knife comprising an actuating push-button (4) mobile with respect to the body of the knife in a direction (B) generally transverse to the knife body and a device for driving the blade holder by means of the push-button, characterized in that the driving device is a device involving pinions (5, 6, 7, 8, 9) for which the pinions are assembled between arms (17) of an element (16) that closes the rear of the body of the knife.
  2. Knife according to Claim 1, for which the driving device comprises means (5, 6; 8, 9) of multiplying the movement travel between the push-button and the blade holder.
  3. Knife according to Claim 1 or 2, comprising a cascade of pinions (5, 6, 7, 8, 9) which cascade is arranged in such a way as to transfer a force applied to the push-button on the rear of the body of the knife towards the front of the body of the knife.
  4. Knife according to Claim 1, 2 or 3, for which the actuating push-button comprises an input rack (10) oriented in the direction of operation of the push-button transversely to the longitudinal direction (A) of the body of the knife (1).
  5. Knife according to Claim 4, for which the input rack (10) meshes with a first pinion (5) of a first diameter (d1) and secured via its rotation axle (13) to a first transfer pinion (6) of a second diameter (d2) greater than the first diameter (d1).
  6. Knife according to any one of Claims 1 to 5, for which the blade holder (3) comprises an output rack (11) oriented in the longitudinal direction (A) of deployment of the blade, the output rack (11) meshing with a final pinion (9) of a final diameter (d4).
  7. Knife according to Claim 6, for which the final pinion (9) is secured, through its rotational axle (14), to a transfer receiving pinion (8) of diameter (d3) smaller than the final diameter.
  8. Knife according to Claims 5 and 7 for which the diameter (d3) of the transfer receiving pinion (8) and the diameter (d1) of the first pinion (5) are equal and/or the diameter (d2) of the first transfer pinion and the diameter (d4) of the final pinion are equal, the ratio of the second diameter (d2) to the first diameter (d1) being greater than 2.
  9. Knife according to Claim 4, for which the push-button (4) is a rotary push-button comprising a rotation axle (12) on the front side of deployment of the blade from the body of the knife (1), the rack (11) being arranged towards the rear of the body of the knife on an arc of a circle centred on the said rotation axle and oriented towards the axle.
  10. Knife according to Claim 6, for which the blade holder is guided longitudinally in the body of the knife, the output rack (11) running alongside an edge (31) of the said blade holder (3).
  11. Knife according to any one of the preceding claims, for which the blade holder is mounted on the closure element, a return spring being arranged between the blade holder and the said closure element.
EP15177637.4A 2014-07-31 2015-07-21 Knife with blade exit controlled by actuating pusher and pinions Active EP2979828B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1457434A FR3024385B1 (en) 2014-07-31 2014-07-31 KNIFE WITH BLADE OUTPUT CONTROLLED BY PUSH BUTTON AND SPROCKETS

Publications (2)

Publication Number Publication Date
EP2979828A1 EP2979828A1 (en) 2016-02-03
EP2979828B1 true EP2979828B1 (en) 2017-03-15

Family

ID=51570725

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Application Number Title Priority Date Filing Date
EP15177637.4A Active EP2979828B1 (en) 2014-07-31 2015-07-21 Knife with blade exit controlled by actuating pusher and pinions

Country Status (2)

Country Link
EP (1) EP2979828B1 (en)
FR (1) FR3024385B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10179415B2 (en) 2017-03-30 2019-01-15 Ritesafety Products International, Llc Hand cutter with a retractable blade
WO2019014878A1 (en) * 2017-07-19 2019-01-24 杭州巨星科技股份有限公司 Retractable cutter
US12083696B2 (en) 2022-07-01 2024-09-10 Darex, Llc Knife with sliding gear
US11571826B1 (en) 2022-07-01 2023-02-07 Darex, Llc Knife with sliding gear

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083775A (en) * 1980-09-17 1982-03-31 Precision Mfg Serv Trimming knife
US6796033B2 (en) * 2002-02-11 2004-09-28 Greg J. Owoc Utility knife
DE202004011913U1 (en) * 2004-07-30 2004-10-14 Huang, Yin-Hai, Taiping Knife, comprising mechanism of toothed wheels for automatic motion of blade integrated in handle
FR2911532B1 (en) 2007-01-19 2009-12-11 Mure & Peyrot AUTOMATICALLY RETRACTABLE BLADE KNIFE
FR2912945B1 (en) 2007-02-27 2009-11-27 Mure & Peyrot SAFETY KNIFE
FR2915416B1 (en) 2007-04-27 2010-01-22 Mure & Peyrot SAFETY KNIFE WITH AUTOMATIC BLADE RETRACTION DEVICE AT THE END OF THE CUT

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
EP2979828A1 (en) 2016-02-03
FR3024385B1 (en) 2017-02-24
FR3024385A1 (en) 2016-02-05

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