WO2006010819A1 - Blade locking device for a hand cutting tool - Google Patents

Blade locking device for a hand cutting tool Download PDF

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Publication number
WO2006010819A1
WO2006010819A1 PCT/FR2005/001574 FR2005001574W WO2006010819A1 WO 2006010819 A1 WO2006010819 A1 WO 2006010819A1 FR 2005001574 W FR2005001574 W FR 2005001574W WO 2006010819 A1 WO2006010819 A1 WO 2006010819A1
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WO
WIPO (PCT)
Prior art keywords
blade
stirrup
axis
handle
knife
Prior art date
Application number
PCT/FR2005/001574
Other languages
French (fr)
Inventor
Jean-Pierre Beal
Original Assignee
Etablissements Lamarque
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Etablissements Lamarque filed Critical Etablissements Lamarque
Publication of WO2006010819A1 publication Critical patent/WO2006010819A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/02—Hand knives with adjustable blade; Pocket knives with pivoted blade
    • B26B1/04—Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position

Definitions

  • the invention relates to a holding device in position of a blade of a cutting hand tool.
  • cutting tool in hand we mean in particular so-called closing knives, that is to say knives whose blade is rotatable about an axis, so as to be inserted, at least at the level of part of its cutting edge, in a housing in the handle of the knife.
  • Such sharp hand tools may also be pruning or folding blade hand saws.
  • FR-A-2 804 359 discloses a folding knife with triple bolts, entirely removable.
  • the various pieces, of which there are about twenty, are entirely removable to allow cleaning.
  • a locking piece keeps the blade inserted into the handle in the rest position.
  • Two other pieces make it possible to block the blade in the position of use of the knife.
  • Such a knife by the number of its parts, is not easy to achieve.
  • its complexity can cause confusion between the locking systems on opening and closing, especially when reassembling parts after cleaning.
  • US-A-4 167 811 discloses a knife whose handle is equipped with a rotating ring at its end bearing a pivoting blade. This ring has a slot for the movement of the blade and provided with a suitable cut blocking a heel of the blade in the closed position.
  • the ring also comprises inclined zones formed on the edges of the slot and intended to block the blade in the open position. This ring does not allow blocking in open or closed effective position, because a force on the blade may cancel the desired locking effect. Moreover the maneuver of the ring is not easy.
  • the invention intends to remedy more particularly by proposing a holding device in the rest position and in the use position of a blade which is simple to maneuver, reliable, effective and easily achievable with a number restricted parts.
  • the subject of the invention is a device for holding a blade of a cutting hand tool in position, in particular a closing knife, the blade being mobile, by pivoting about an axis supported by a sleeve, between a closed position and an open position of use of the tool, a stirrup-shaped body being adapted to cap the fastening area of the blade on the handle, a single member being rotatable relative to this stirrup between a blocking position of the blade in each of its positions and a release position of the blade, characterized in that the member is adapted to pivot relative to the stirrup, about an axis generally perpendicular to a longitudinal axis of the blade.
  • a knife is made in which a single locking member, easy to maneuver, effectively block the blade in one or the other position.
  • the locking member may also adopt a position permitting the maneuvering of the blade. This produces a cutting tool made with few parts, while being effective and secure.
  • the holding device may incorporate one or more of the following features:
  • the stirrup is generally configured in U, the soul of the stirrup being able to block the blade in its open position of use.
  • the stirrup is provided on at least one wall with an opening adapted to allow the passage of the member during its movement between the locking and release positions.
  • the blade is provided with a first zone adapted to support the member when the blade is in the closed position and a second zone adapted to receive bearing the member when the blade is in the open position.
  • the first bearing zone is formed by a relief formed on an edge of one end of the blade, the second bearing zone being formed by a shoulder formed on an edge opposite the end.
  • the blade is mounted free to rotate about an axis and held in a closed position in a housing of the handle by a holding rod, fixed in the stirrup in a direction substantially parallel to the axis of rotation of the blade and inserted into a notch in the blade.
  • the invention also relates to a knife comprising at least one blade and a holder adapted to lock in position the or each blade, this device being in accordance with any one of the preceding features.
  • FIG. 1 is a side view of a closing knife provided with a blade holding device according to the invention, the blade being in the open position
  • FIG. 2 is a view similar to FIG. 1, with the blade in the closed position
  • FIG. 3 is a top view of the knife represented in FIG. 1, the handle being partially shown
  • FIG. 4 is a bottom view of the blade.
  • Figure 1 is a perspective view of the various elements of the device, prior to their mounting on the knife
  • Figure 6 is a longitudinal section along the plane Vl-Vl in Figure 3
  • Figure 7 is a view similar to Figure 6, the blade being in the closed position.
  • the knife 1 shown in Figure 1 comprises a handle 2 made of a rigid material.
  • This handle is provided with a housing 3 in the form of a longitudinal groove adapted to receive a blade 4.
  • This blade is mounted at one end of the handle 2 so as to be rotatable about an axis.
  • This axis of rotation is materialized by a rod 5 fixed in the vicinity of one end of the housing 3 of the handle.
  • This rod 5 is oriented in a direction generally perpendicular to a longitudinal axis AA 'of the blade 4, shown in Figures 3 and 4.
  • the rod 5 is fixed, for example removably, by screws to allow the disassembly of the blade 4.
  • the assembly that is to say the blade 4 and the handle 2, is held in position by a holding device, visible in particular in Figure 5.
  • This device comprises firstly a body 6, stirrup-shaped , covering the ends of the handle 2 and the blade 4 in the vicinity of their junction zone.
  • This stirrup 6, which is generally configured in U 1 is made of a rigid material, for example in a steel, a steel alloy or a polymer-based material.
  • a cutout 7,8 is formed respectively on each wing 9, 10, of the U in the vicinity of their junction with the core 11 of the U. These cuts are of different lengths, the cutout 7 being the longest.
  • a generally lug-shaped locking member 12 is made of a rigid material, for example a steel, a steel alloy or a polymer-based material.
  • the tab 12 has dimensions adapted to be inserted under the core 11 of the stirrup 6.
  • the tab 12 pivots about an axis 13 located between the handle 2 and the bar 11.
  • the axis 13 is formed by the screwing of a screw 13a in a threaded cylinder 13b, visible in Figure 5 This axis 13 is oriented in a direction generally perpendicular to the axis AA 'of the blade.
  • the dimensions and the thickness of the tab 12 are complementary to the dimensions of the cutout 7, so that the tab 12 can be displaced, by pivoting about its axis 13, to a position where the tab 12 is extends in the first position, the tab 12 is no longer interposed between the core 11 and one end of the blade 4.
  • this tab 12 is positioned between the two cutouts 7 and 8, under the core 11 of the stirrup 6. Its length greater than that of the small cutout 8 allows the flange 10 of the stirrup 6 to form a stop at movement of the tab 12. In this position, the tab 12 is positioned under the core 11, in the extension of the blade 4.
  • a return spring 14, housed in a counterbore formed in the tab 12, is fixed between the tab 12 and the core 11, so that the rotational movement of the leg 12 towards the outside of the caliper r 6 is done under the action of the user. Stopping this action, that is to say the release of the tab 12 by the user, eliminates the force opposing the return action of the spring 14 so that it returns to the position of rest the tab 12 under the core 11 of the stirrup.
  • the blade 4 comprises, on the edge on the same side as the cutting edge of the blade 4, a relief 16 extending from the blade 4 This relief 16 is located in the vicinity of the axis of rotation 5 of the blade 4.
  • the blade 4 is also provided with a notch 17, formed on the same edge as the relief 16 and in the vicinity of the axis 5.
  • the end of the heel comprises two shoulders 18,19 together defining a step.
  • the shoulder 18, located at the free end of the heel 15, has a greater length than the shoulder 19, the latter being located closer to the tip of the blade 4.
  • the heel 15, the lug 12 and the core 11 are arranged so that they form, mutually, a stop means opposing any movement of the blade.
  • this double support prevents an accidental movement of closing the blade of the knife.
  • the lug 12 When one rotates according to the arrow F, the lug 12 about its axis 13, it exits the inner volume of the caliper 6. It is no longer, in this position, resting on the first shoulder 18 of the blade 4.
  • the dimensions and shapes of these shoulders 18, 19 are sufficient so that, when they abut against the core 11 of the stirrup, a continuation in force of rotation of the blade 4 is enough to bring out the end of the heel 15 out of the defined volume of the stirrup 6 so as to completely fold the blade 4 in the housing 3 formed in the handle 2.
  • This action is also facilitated by the relative flexibility of the constituent material of the core 11 of the stirrup.
  • the rotational movement of the blade 4 can be facilitated by a rounded shape, at least on one side, of the end of the portion 20 of the tab 12 and the end of the heel 15.
  • the notch 17 caps a rod 22 fixed in the handle 2 in a direction generally parallel to the axis of rotation 5 of the blade 4.
  • the rod 22 is generally in the same plane as the axis 5.
  • the rod 22 is, for example and similarly to the axis 5, removably fixed, for example by screws, thus allowing the disassembly of the stirrup 6.
  • the locking of the blade 4 in the closed position in the handle 2 is thus performed, the deployment of the blade 4 being possible only under the voluntary action of the user, when the latter rotates the tab 12.
  • the tab 12 in the rest position under the core 11 of the stirrup blocks the blade 4 in position, that the latter is in the closed position, that is to say partially inserted in the handle 2 or in the open position, that is to say deployed out of the housing 3, the knife being ready to be used.
  • the active position that is to say when the tab 12 is rotated and extends out of the stirrup 6, the blade 4 is released and a rotational movement that is to say opening or closing thereof is possible.
  • the dimensions of the locking member 12 and the fixing member 6 are different.
  • the cutout 8 is larger than the cutout 7, which allows a rotation of the tab 12 in the opposite direction to that described.
  • Such a configuration is, for example, used to make a left-handed knife.
  • the guide means of the blade 4 in position may be other than a notch 17, for example guides may be arranged in the housing 3 of the handle 2.

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

Abstract

The invention relates to a device for locking the blade of a hand cutting tool, in particular a clasp knife (1), wherein said blade (4) is movable by pivoting about an axis (5) supported by a handle (2) between a closed position and open position for using the tool. A bracket-shaped body (6) overlaps the area where the blade (4) is fixed to the handle (2), wherein a single member (12) is rotatably movable with respect to the bracket (6) between the position when blade (4) is locked in each position thereof and a blade releasing position. The member (12) is pivotable about an axis generally perpendicular to the longitudinal axis of the blade (4) with respect to the bracket (6)

Description

DISPOSITIF DE MAINTIEN EN POSITION D'UNE LAME D'UN OUTIL TkANCHANT A MAINDEVICE FOR HOLDING A BLADE OF A HAND TAPPING TOOL
L'invention a trait à un dispositif de maintien en position d'une lame d'un outil tranchant à main. Par outil tranchant à main, on entend notamment des couteaux dits fermants, c'est-à-dire des couteaux dont la lame est mobile en rotation autour d'un axe, de manière à venir s'insérer, au moins au niveau d'une partie de son tranchant, dans un logement ménagé dans le manche du couteau. De tels outils tranchants à main peuvent également être des serpes ou des scies à main à lame repliable.The invention relates to a holding device in position of a blade of a cutting hand tool. By cutting tool in hand, we mean in particular so-called closing knives, that is to say knives whose blade is rotatable about an axis, so as to be inserted, at least at the level of part of its cutting edge, in a housing in the handle of the knife. Such sharp hand tools may also be pruning or folding blade hand saws.
Il est important, pour des raisons de sécurité, de pouvoir maintenir les lames bloquées en position, notamment en position d'utilisation, c'est-à-dire lorsque la lame est déployée et que son tranchant n'est plus protégé par le manche. En bloquant ainsi la lame, on évite une fermeture accidentelle de l'outil pouvant générer des blessures. De même, il est important de pouvoir maintenir la lame en position de repos dans le manche, de manière à éviter un déploiement accidentel de la lame qui pourrait également entraîner des blessures.It is important, for security reasons, to be able to keep the locked blades in position, especially in the position of use, that is to say when the blade is deployed and that its edge is no longer protected by the handle . By thus blocking the blade, it prevents accidental closure of the tool can cause injury. Similarly, it is important to be able to keep the blade in the rest position in the handle, so as to avoid accidental blade deployment which could also lead to injury.
On connaît, par FR-A-2 804 359, un couteau pliant à triple verrou, entièrement démontable. Dans un tel couteau les différentes pièces, au nombre d'une vingtaine, sont entièrement amovibles pour permettre le nettoyage. Une pièce de blocage permet de maintenir la lame, insérée dans le manche en position de repos. Deux autres pièces permettent de bloquer la lame en position d'utilisation du couteau. Un tel couteau, de par le nombre de ses pièces, n'est pas aisé à réaliser. De plus, sa complexité peut entraîner une confusion entre les systèmes de blocage à l'ouverture et à la fermeture, notamment lors du remontage des pièces après leur nettoyage. US-A-4 167 811 divulgue un couteau dont le manche est équipé d'une bague rotative au niveau de son extrémité portant une lame pivotante. Cette bague comporte une fente permettant le mouvement de la lame et pourvue d'une découpe sensée bloquer un talon de la lame en position fermée. La bague comprend également des zones inclinées ménagées sur les bords de la fente et destinées à bloquer la lame en position ouverte. Cette bague ne permet pas un blocage en position ouverte ou fermée efficace, car un effort sur la lame risque d'annuler l'effet de blocage recherché. Par ailleurs la manœuvre de la bague est mal aisée.FR-A-2 804 359 discloses a folding knife with triple bolts, entirely removable. In such a knife, the various pieces, of which there are about twenty, are entirely removable to allow cleaning. A locking piece keeps the blade inserted into the handle in the rest position. Two other pieces make it possible to block the blade in the position of use of the knife. Such a knife, by the number of its parts, is not easy to achieve. In addition, its complexity can cause confusion between the locking systems on opening and closing, especially when reassembling parts after cleaning. US-A-4 167 811 discloses a knife whose handle is equipped with a rotating ring at its end bearing a pivoting blade. This ring has a slot for the movement of the blade and provided with a suitable cut blocking a heel of the blade in the closed position. The ring also comprises inclined zones formed on the edges of the slot and intended to block the blade in the open position. This ring does not allow blocking in open or closed effective position, because a force on the blade may cancel the desired locking effect. Moreover the maneuver of the ring is not easy.
C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un dispositif de maintien en position de repos et en position d'utilisation d'une lame qui est simple à manœuvrer, fiable, efficace et aisément réalisable avec un nombre restreint de pièces.It is these disadvantages that the invention intends to remedy more particularly by proposing a holding device in the rest position and in the use position of a blade which is simple to maneuver, reliable, effective and easily achievable with a number restricted parts.
A cet effet, l'invention a pour objet un dispositif de maintien en position d'une lame d'un outil tranchant à main, notamment d'un couteau fermant, la lame étant mobile, par pivotement autour d'un axe supporté par un manche, entre une position fermée et une position ouverte d'utilisation de l'outil, un corps en forme d'étrier étant propre à coiffer la zone de fixation de la lame sur le manche, un organe unique étant mobile en rotation par rapport à cet étrier entre une position de blocage de la lame dans chacune de ses positions et une position de libération de la lame, caractérisé en ce que l'organe est propre à pivoter par rapport à l'étrier, autour d'un axe globalement perpendiculaire à un axe longitudinal de la lame.For this purpose, the subject of the invention is a device for holding a blade of a cutting hand tool in position, in particular a closing knife, the blade being mobile, by pivoting about an axis supported by a sleeve, between a closed position and an open position of use of the tool, a stirrup-shaped body being adapted to cap the fastening area of the blade on the handle, a single member being rotatable relative to this stirrup between a blocking position of the blade in each of its positions and a release position of the blade, characterized in that the member is adapted to pivot relative to the stirrup, about an axis generally perpendicular to a longitudinal axis of the blade.
Grâce à l'invention, on réalise un couteau dans lequel un seul organe de blocage, aisé à manoeuvrer, permet de bloquer efficacement la lame dans l'une ou l'autre position. L'organe de blocage peut également adopter une position permettant la manoeuvre de la lame. On obtient ainsi un outil tranchant réalisé avec peu de pièces, tout en étant efficace et sécurisé.Thanks to the invention, a knife is made in which a single locking member, easy to maneuver, effectively block the blade in one or the other position. The locking member may also adopt a position permitting the maneuvering of the blade. This produces a cutting tool made with few parts, while being effective and secure.
Selon des aspects avantageux mais non obligatoires de l'invention, le dispositif de maintien peut incorporer une ou plusieurs des caractéristiques suivantes :According to advantageous but not obligatory aspects of the invention, the holding device may incorporate one or more of the following features:
II comprend en outre un moyen de rappel de l'organe unique dans sa position de blocage, notamment un ressort monté sur l'organe.It further comprises a return means of the single member in its locking position, in particular a spring mounted on the member.
L'étrier est globalement configuré en U, l'âme de l'étrier étant propre à bloquer la lame dans sa position ouverte d'utilisation.The stirrup is generally configured in U, the soul of the stirrup being able to block the blade in its open position of use.
L'étrier est muni, sur au moins une paroi, d'une ouverture adaptée pour permettre le passage de l'organe lors de son mouvement entre les positions de blocage et de libération.The stirrup is provided on at least one wall with an opening adapted to allow the passage of the member during its movement between the locking and release positions.
La lame est pourvue d'une première zone adaptée pour recevoir en appui l'organe lorsque la lame est en position fermée et d'une seconde zone adaptée pour recevoir en appui l'organe lorsque la lame est en position ouverte.The blade is provided with a first zone adapted to support the member when the blade is in the closed position and a second zone adapted to receive bearing the member when the blade is in the open position.
La première zone d'appui est formée par un relief ménagé sur un bord d'une extrémité de la lame, la seconde zone d'appui étant formée par un épaulement ménagé sur un bord opposé de l'extrémité. La lame est montée libre en rotation autour d'un axe et maintenue en position fermée dans un logement du manche par une tige de maintien, fixée dans l'étrier selon une direction sensiblement parallèle à l'axe de rotation de la lame et insérée dans une encoche ménagée dans la lame. L'invention concerne également un couteau comprenant au moins une lame et un dispositif de maintien propre à verrouiller en position la ou chaque lame, ce dispositif étant conforme à l'une quelconque des caractéristiques précédentes.The first bearing zone is formed by a relief formed on an edge of one end of the blade, the second bearing zone being formed by a shoulder formed on an edge opposite the end. The blade is mounted free to rotate about an axis and held in a closed position in a housing of the handle by a holding rod, fixed in the stirrup in a direction substantially parallel to the axis of rotation of the blade and inserted into a notch in the blade. The invention also relates to a knife comprising at least one blade and a holder adapted to lock in position the or each blade, this device being in accordance with any one of the preceding features.
L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lecture de la description qui va suivre d'un mode de réalisation d'un dispositif de maintien conforme à l'invention, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés dans lesquels : la figure 1 est une vue de côté d'un couteau fermant muni d'un dispositif de maintien de la lame conforme à l'invention, la lame étant en position ouverte, la figure 2 est une vue similaire à la figure 1 , la lame étant en position fermée, la figure 3 est une vue de dessus du couteau représenté à la figure 1 , le manche étant partiellement représenté, - la figure 4 est une vue de dessous du couteau représenté à la figure 1 , le manche étant partiellement représenté, la figure 5 est une vue en perspective des différents éléments du dispositif, préalablement à leur montage sur le couteau, la figure 6 est une coupe longitudinale selon le plan Vl-Vl à la figure 3, et la figure 7 est une vue similaire à la figure 6, la lame étant en position fermée.The invention will be better understood and other advantages thereof will appear more clearly on reading the following description of an embodiment of a holding device according to the invention, given solely as a 1 and is a side view of a closing knife provided with a blade holding device according to the invention, the blade being in the open position, the FIG. 2 is a view similar to FIG. 1, with the blade in the closed position, FIG. 3 is a top view of the knife represented in FIG. 1, the handle being partially shown, FIG. 4 is a bottom view of the blade. knife shown in Figure 1, the handle being partially shown, Figure 5 is a perspective view of the various elements of the device, prior to their mounting on the knife, Figure 6 is a longitudinal section along the plane Vl-Vl in Figure 3, and Figure 7 is a view similar to Figure 6, the blade being in the closed position.
Le couteau 1 représenté à la figure 1 comprend un manche 2 réalisé en un matériau rigide. Ce manche est pourvu d'un logement 3, en forme de rainure longitudinale apte à recevoir une lame 4. Cette lame est montée à une extrémité du manche 2 de manière à être mobile en rotation autour d'un axe.The knife 1 shown in Figure 1 comprises a handle 2 made of a rigid material. This handle is provided with a housing 3 in the form of a longitudinal groove adapted to receive a blade 4. This blade is mounted at one end of the handle 2 so as to be rotatable about an axis.
Cet axe de rotation est matérialisé par une tige 5 fixée au voisinage d'une extrémité du logement 3 du manche. Cette tige 5 est orientée selon une direction globalement perpendiculaire à un axe longitudinal A-A' de la lame 4, représenté aux figures 3 et 4. La tige 5 est fixée, par exemple de façon amovible, par des vis de manière à permettre le démontage de la lame 4.This axis of rotation is materialized by a rod 5 fixed in the vicinity of one end of the housing 3 of the handle. This rod 5 is oriented in a direction generally perpendicular to a longitudinal axis AA 'of the blade 4, shown in Figures 3 and 4. The rod 5 is fixed, for example removably, by screws to allow the disassembly of the blade 4.
L'ensemble, c'est à dire la lame 4 et le manche 2, est maintenu en position par un dispositif de maintien, visible notamment sur la figure 5. Ce dispositif comprend tout d'abord un corps 6, en forme d'étrier, coiffant les extrémités du manche 2 et de la lame 4 au voisinage de leur zone de jonction. Cet étrier 6, qui est globalement configuré en U1 est réalisé dans un matériau rigide, par exemple dans un acier, dans un alliage d'aciers ou dans un matériau à base de polymère.The assembly, that is to say the blade 4 and the handle 2, is held in position by a holding device, visible in particular in Figure 5. This device comprises firstly a body 6, stirrup-shaped , covering the ends of the handle 2 and the blade 4 in the vicinity of their junction zone. This stirrup 6, which is generally configured in U 1 is made of a rigid material, for example in a steel, a steel alloy or a polymer-based material.
Une découpe 7,8 est ménagée respectivement sur chaque aile 9, 10, du U au voisinage de leur jonction avec l'âme 11 du U. Ces découpes sont de longueurs différentes, la découpe 7 étant la plus longue. Un organe de blocage, globalement en forme de patte 12, est réalisé dans un matériau rigide, par exemple dans un acier, un alliage d'aciers ou un matériau à base de polymère. La patte 12 a des dimensions adaptées pour être insérée sous l'âme 11 de l'étrier 6. La patte 12 pivote autour d'un axe 13 situé entre le manche 2 et la barre 11. L'axe 13 est formé par le vissage d'une vis 13a dans un cylindre taraudé 13b, visibles à la figure 5. Cet axe 13 est orienté selon une direction globalement perpendiculaire à l'axe A-A' de la lame. Les dimensions et l'épaisseur de la patte 12 sont complémentaires des dimensions de la découpe 7, de manière à ce que la patte 12 puisse être déplacée, par pivotement autour de son axe 13, jusqu'à une position où la patte 12 s'étend vers l'extérieur de l'étrier 6 à partir de la découpe 7. Ainsi, dans cette première position, la patte 12 n'est plus interposée entre l'âme 11 et une extrémité de la lame 4. Dans une seconde position, cette patte 12 est positionnée entre les deux découpes 7 et 8, sous l'âme 11 de l'étrier 6. Sa longueur supérieure à celle de la petite découpe 8 permet à l'aile 10 de l'étrier 6 de former une butée au mouvement de la patte 12. Dans cette position, la patte12 est positionnée sous l'âme 11 , dans le prolongement de la lame 4. Un ressort de rappel 14, logé dans un lamage ménagé dans la patte 12, est fixé entre la patte 12 et l'âme 11 , de manière à ce que le mouvement de rotation de la patte 12 vers l'extérieur de l'étrier 6 se fasse sous l'action de l'utilisateur. L'arrêt de cette action, c'est-à-dire le relâchement de la patte 12 par l'utilisateur, supprime la force s'opposant à l'action de rappel du ressort 14 de sorte que celui-ci ramène en position de repos la patte 12 sous l'âme 11 de l'étrier.A cutout 7,8 is formed respectively on each wing 9, 10, of the U in the vicinity of their junction with the core 11 of the U. These cuts are of different lengths, the cutout 7 being the longest. A generally lug-shaped locking member 12 is made of a rigid material, for example a steel, a steel alloy or a polymer-based material. The tab 12 has dimensions adapted to be inserted under the core 11 of the stirrup 6. The tab 12 pivots about an axis 13 located between the handle 2 and the bar 11. The axis 13 is formed by the screwing of a screw 13a in a threaded cylinder 13b, visible in Figure 5 This axis 13 is oriented in a direction generally perpendicular to the axis AA 'of the blade. The dimensions and the thickness of the tab 12 are complementary to the dimensions of the cutout 7, so that the tab 12 can be displaced, by pivoting about its axis 13, to a position where the tab 12 is extends in the first position, the tab 12 is no longer interposed between the core 11 and one end of the blade 4. In a second position, this tab 12 is positioned between the two cutouts 7 and 8, under the core 11 of the stirrup 6. Its length greater than that of the small cutout 8 allows the flange 10 of the stirrup 6 to form a stop at movement of the tab 12. In this position, the tab 12 is positioned under the core 11, in the extension of the blade 4. A return spring 14, housed in a counterbore formed in the tab 12, is fixed between the tab 12 and the core 11, so that the rotational movement of the leg 12 towards the outside of the caliper r 6 is done under the action of the user. Stopping this action, that is to say the release of the tab 12 by the user, eliminates the force opposing the return action of the spring 14 so that it returns to the position of rest the tab 12 under the core 11 of the stirrup.
Au voisinage de l'extrémité de la lame 4 formant le talon 15 de cette dernière, la lame 4 comprend, sur le bord situé du même côté que le tranchant de la lame 4, un relief 16 s'étendant à partir de la lame 4. Ce relief 16 est situé au voisinage de l'axe de rotation 5 de la lame 4. La lame 4 est également pourvue d'une encoche 17, ménagée sur le même bord que le relief 16 et au voisinage de l'axe 5.In the vicinity of the end of the blade 4 forming the heel 15 of the latter, the blade 4 comprises, on the edge on the same side as the cutting edge of the blade 4, a relief 16 extending from the blade 4 This relief 16 is located in the vicinity of the axis of rotation 5 of the blade 4. The blade 4 is also provided with a notch 17, formed on the same edge as the relief 16 and in the vicinity of the axis 5.
Sur le bord du talon 15 opposé à celui équipé d'un relief 16, l'extrémité du talon comprend deux épaulements 18,19 définissant ensemble une marche. L'épaulement 18, situé à l'extrémité libre du talon 15, a une plus grande longueur que l'épaulement 19, ce dernier étant situé plus près de la pointe de la lame 4.On the edge of the heel 15 opposite that equipped with a relief 16, the end of the heel comprises two shoulders 18,19 together defining a step. The shoulder 18, located at the free end of the heel 15, has a greater length than the shoulder 19, the latter being located closer to the tip of the blade 4.
Comme illustré à la figure 6, lorsque la lame 4 est en position déployée, c'est-à-dire prête à l'utilisation, et qu'aucune action de rotation n'est effectuée sur la patte 12, une partie 20 de cette dernière est en appui sur le premier épaulement 18 de la lame. L'épaulement 19 est, quant à lui, en appui sur une partie terminale 21 de l'âme 11 de l'étrier 6. Le talon 15 de la lame est maintenu en position par l'appui de deux parties 20, 21 de deux pièces différentes 12, respectivement 11 , sur deux épaulements adjacents 18, respectivement 19.As illustrated in Figure 6, when the blade 4 is in the deployed position, that is to say ready for use, and no rotational action is performed on the leg 12, a portion 20 of this last is supported on the first shoulder 18 of the blade. The shoulder 19 is, in turn, supported on an end portion 21 of the core 11 of the stirrup 6. The heel 15 of the blade is held in position by the support of two parts 20, 21 of two different parts 12, respectively 11, on two adjacent shoulders 18, respectively 19.
Le talon 15, la patte 12 et l'âme 11 sont disposés de manière à ce qu'ils forment, mutuellement, un moyen de butée s'opposant à tout mouvement de la lame. Ainsi, ce double appui empêche un mouvement accidentel de fermeture de la lame du couteau. Lorsque l'on met en rotation selon la flèche F, la patte 12 autour de son axe 13, celle-ci sort du volume intérieur de l'étrier 6. Elle n'est plus, dans cette position, en appui sur le premier épaulement 18 de la lame 4. Les dimensions et les formes de ces épaulements 18,19 sont suffisantes pour que, lorsqu'ils se trouvent en butée contre l'âme 11 de l'étrier, une poursuite en force du mouvement de rotation de la lame 4 suffit à faire sortir l'extrémité du talon 15 hors du volume défini de l'étrier 6 de manière à replier complètement la lame 4 dans le logement 3 ménagé dans le manche 2. Cette action est par ailleurs facilitée par la souplesse relative du matériau constitutif de l'âme 11 de l'étrier. Le mouvement de rotation de la lame 4 peut être facilité par une forme arrondie, au moins sur une face, de l'extrémité de la partie 20 de la patte 12 et de l'extrémité du talon 15.The heel 15, the lug 12 and the core 11 are arranged so that they form, mutually, a stop means opposing any movement of the blade. Thus, this double support prevents an accidental movement of closing the blade of the knife. When one rotates according to the arrow F, the lug 12 about its axis 13, it exits the inner volume of the caliper 6. It is no longer, in this position, resting on the first shoulder 18 of the blade 4. The dimensions and shapes of these shoulders 18, 19 are sufficient so that, when they abut against the core 11 of the stirrup, a continuation in force of rotation of the blade 4 is enough to bring out the end of the heel 15 out of the defined volume of the stirrup 6 so as to completely fold the blade 4 in the housing 3 formed in the handle 2. This action is also facilitated by the relative flexibility of the constituent material of the core 11 of the stirrup. The rotational movement of the blade 4 can be facilitated by a rounded shape, at least on one side, of the end of the portion 20 of the tab 12 and the end of the heel 15.
Lorsque la lame 4 est repliée, son tranchant étant inséré dans le logement 3 du manche 2, l'encoche 17 coiffe une tige 22 fixée dans le manche 2 selon une direction globalement parallèle à l'axe de rotation 5 de la lame 4. La tige 22 est globalement dans le même plan que l'axe 5. La tige 22 est, par exemple et de manière similaire à l'axe 5, fixée de manière amovible, par exemple par des vis, permettant ainsi le démontage de l'étrier 6.When the blade 4 is folded, its cutting edge being inserted into the housing 3 of the handle 2, the notch 17 caps a rod 22 fixed in the handle 2 in a direction generally parallel to the axis of rotation 5 of the blade 4. The rod 22 is generally in the same plane as the axis 5. The rod 22 is, for example and similarly to the axis 5, removably fixed, for example by screws, thus allowing the disassembly of the stirrup 6.
Dans cette position fermée de la lame, lorsque l'on relâche la patte 12, celle-ci revient dans une position, représentée notamment à la figure 7, où elle est dans la même configuration que celle décrite précédemment, c'est-à-dire celle qu'elle occupe en position de blocage de la lame, en position ouverte. Dans ce cas, la partie 20 de la patte 12 n'est pas en appui sur l'épaulement 18 mais se trouve positionnée, en butée, contre le relief 16. Ainsi, dans cette configuration cette partie 20 de la patte 12 s'oppose à tout mouvement de rotation de la lame tendant à déployer la lame 4 hors du manche 2.In this closed position of the blade, when the lug 12 is released, it returns to a position, represented in particular in FIG. 7, where it is in the same configuration as that described above, that is, say the one it occupies in the blocking position of the blade, in the open position. In this case, the portion 20 of the tab 12 is not resting on the shoulder 18 but is positioned, in abutment, against the relief 16. Thus, in this configuration, this portion 20 of the tab 12 opposes any movement of rotation of the blade tending to deploy the blade 4 out of the handle 2.
Le verrouillage de la lame 4 en position fermée dans le manche 2 est ainsi effectué, le déploiement de la lame 4 n'étant possible que sous l'action volontaire de l'utilisateur, lorsque ce dernier met en rotation la patte 12. La patte 12 en position de repos sous l'âme 11 de l'étrier, bloque la lame 4 en position, que cette dernière soit en position fermée, c'est-à-dire partiellement insérée dans le manche 2 ou en position ouverte, c'est-à-dire déployée hors du logement 3, le couteau étant prêt à être utilisé. En position active, c'est-à-dire lorsque la patte 12 est mise en rotation et qu'elle s'étend hors de l'étrier 6, la lame 4 est libérée et un mouvement de rotation c'est-à-dire d'ouverture ou de fermeture de celle-ci est possible.The locking of the blade 4 in the closed position in the handle 2 is thus performed, the deployment of the blade 4 being possible only under the voluntary action of the user, when the latter rotates the tab 12. The tab 12 in the rest position under the core 11 of the stirrup, blocks the blade 4 in position, that the latter is in the closed position, that is to say partially inserted in the handle 2 or in the open position, that is to say deployed out of the housing 3, the knife being ready to be used. In the active position, that is to say when the tab 12 is rotated and extends out of the stirrup 6, the blade 4 is released and a rotational movement that is to say opening or closing thereof is possible.
Dans d'autres configurations, les dimensions de l'organe de blocage 12 et de l'organe de fixation 6 sont différentes. De même on peut réaliser en variante un étrier 6 équipé de deux organes de blocage en forme de patte 12, côte à côte, chacune agissant pour le blocage d'une lame 4. Dans ce cas les lames sont parallèles et les mouvements de rotation des pattes sont opposés.In other configurations, the dimensions of the locking member 12 and the fixing member 6 are different. In the same way, it is possible to alternatively produce a stirrup 6 equipped with two tab-shaped blocking members 12, side by side, each acting to block a blade 4. In this case the blades are parallel and the rotational movements of the blades legs are opposed.
En variante, la découpe 8 est plus grande que la découpe 7, ce qui permet une rotation de la patte 12 dans le sens inverse de celle décrite. Une telle configuration est, par exemple, utilisée pour réaliser un couteau pour gaucher.Alternatively, the cutout 8 is larger than the cutout 7, which allows a rotation of the tab 12 in the opposite direction to that described. Such a configuration is, for example, used to make a left-handed knife.
Dans ce cas les faces arrondies de l'extrémité du talon 15 et de la partie 20 de la patte 12 sont adaptées.In this case the rounded faces of the end of the heel 15 and the portion 20 of the tab 12 are adapted.
Dans une autre configuration que celle décrite, c'est à dire celle où la tige 22 et l'axe 5 étant amovibles les pièces constitutives du couteau sont aisément démontables, on peut fixer de façon définitive, par exemple par rivetage ou soudage la tige 22 et l'axe 5. Dans ce cas, le couteau n'est plus démontable. Dans un autre mode de réalisation, le moyen de guidage de la lame 4 en position peut être autre qu'une encoche 17, par exemple des guides peuvent être aménagés dans le logement 3 du manche 2.In another configuration than that described, that is to say one where the rod 22 and the axis 5 being removable the component parts of the knife are easily removable, can be fixed permanently, for example by riveting or welding the rod 22 and the axis 5. In this case, the knife is no longer removable. In another embodiment, the guide means of the blade 4 in position may be other than a notch 17, for example guides may be arranged in the housing 3 of the handle 2.
Dans une autre configuration, on peut envisager un dispositif dépourvu de moyens de rappel en position de la patte 12. Dans ce cas le retour en position et le blocage de la lame se fait sur l'action de l'usager. In another configuration, it is possible to envisage a device devoid of return means in position of the tab 12. In this case the return to position and the locking of the blade is done on the action of the user.

Claims

REVENDICATIONS
1. Dispositif de maintien en position d'une lame (4) d'un outil tranchant à main, notamment d'un couteau fermant (1), ladite lame étant mobile, par pivotement autour d'un axe (5) supporté par un manche (2), entre une position fermée et une position ouverte d'utilisation de l'outil, un corps (6) en forme d'étrier étant propre à coiffer la zone de fixation de ladite lame (4) sur ledit manche (2), un organe unique (12) étant mobile en rotation (F) par rapport à cet étrier (6) entre une position de blocage de la lame (4) dans chacune de ses positions et une position de libération de ladite lame, caractérisé en ce que ledit organe (12) est propre à pivoter par rapport audit étrier (6), autour d'un axe (13) globalement perpendiculaire à un axe longitudinal (A-A') de ladite lame (4).1. Device for holding a blade (4) in position of a cutting hand tool, in particular a closing knife (1), said blade being movable, by pivoting about an axis (5) supported by a handle (2), between a closed position and an open position of use of the tool, a stirrup-shaped body (6) being adapted to cap the fastening area of said blade (4) on said handle (2). ), a single member (12) being movable in rotation (F) relative to this stirrup (6) between a locking position of the blade (4) in each of its positions and a release position of said blade, characterized in said member (12) is adapted to pivot relative to said stirrup (6) about an axis (13) generally perpendicular to a longitudinal axis (A-A ') of said blade (4).
2. Dispositif selon la revendication 1 , caractérisé en ce qu'il comprend en outre un moyen de rappel de l'organe unique (12) dans sa position de blocage, notamment un ressort (14) monté sur ledit organe (12).2. Device according to claim 1, characterized in that it further comprises a return means of the single member (12) in its locking position, in particular a spring (14) mounted on said member (12).
3. Dispositif selon l'une des revendications précédentes, caractérisé en ce que ledit étrier (6) est globalement configuré en U, l'âme (11) dudit étrier (6) étant propre à bloquer la lame (4) dans sa position ouverte d'utilisation. 3. Device according to one of the preceding claims, characterized in that said yoke (6) is generally U-shaped, the core (11) of said yoke (6) being adapted to lock the blade (4) in its open position use.
4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que ledit étrier (6) est muni, sur au moins une paroi, d'une ouverture (7) adaptée pour permettre le passage de l'organe (12) lors de son mouvement entre les positions de blocage et de libération. 4. Device according to one of the preceding claims, characterized in that said stirrup (6) is provided on at least one wall, with an opening (7) adapted to allow the passage of the member (12) during its movement between the blocking and releasing positions.
5. Dispositif selon une des revendications précédentes, caractérisé en ce que ladite lame (4) est pourvue d'une première zone (16) adaptée pour recevoir en appui ledit organe (12) lorsque ladite lame (4) est en position fermée et d'une seconde zone (18) adaptée pour recevoir en appui ledit organe (12) lorsque ladite lame (4) est en position ouverte.5. Device according to one of the preceding claims, characterized in that said blade (4) is provided with a first zone (16) adapted to receive bearing said member (12) when said blade (4) is in the closed position and d a second zone (18) adapted to receive in support said member (12) when said blade (4) is in the open position.
6. Dispositif selon la revendication 5, caractérisé en ce que ladite première zone d'appui est formée par un relief (16) ménagé sur un bord d'une extrémité (15) de la lame (4), ladite seconde zone d'appui étant formée par un épaulement (18) ménagé sur un bord opposé de ladite extrémité. 6. Device according to claim 5, characterized in that said first bearing zone is formed by a relief (16) formed on an edge of one end (15) of the blade (4), said second bearing zone being formed by a shoulder (18) formed on an opposite edge of said end.
7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que ladite lame (4) est montée libre en rotation autour d'un axe (5) et maintenue en position fermée dans un logement (3) du manche (2) par une tige de maintien (22), fixée dans l'étrier (6) selon une direction sensiblement parallèle à l'axe de rotation (5) de la lame (4) et insérée dans une encoche (17) ménagée dans ladite lame (4).7. Device according to one of the preceding claims, characterized in that said blade (4) is rotatably mounted around an axis (5) and held in a closed position in a housing (3) of the handle (2) by a holding rod (22) fixed in the stirrup (6) in a direction substantially parallel to the axis of rotation (5) of the blade (4) and inserted into a notch (17) in said blade (4); ).
8. Couteau (1) comprenant au moins une lame et un dispositif de maintien propre à verrouiller en position la ou chaque lame, ce dispositif étant conforme à l'une quelconque des revendications précédentes. 8. A knife (1) comprising at least one blade and a holder adapted to lock in position the or each blade, this device being in accordance with any one of the preceding claims.
PCT/FR2005/001574 2004-06-28 2005-06-22 Blade locking device for a hand cutting tool WO2006010819A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0407066 2004-06-28
FR0407066A FR2872079B1 (en) 2004-06-28 2004-06-28 DEVICE FOR HOLDING A BLADE OF A HAND-MADE TOOL

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WO2006010819A1 true WO2006010819A1 (en) 2006-02-02

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FR (1) FR2872079B1 (en)
WO (1) WO2006010819A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191302872A (en) * 1913-02-04 1913-06-12 Ernst Kolfhaus Improvements in and relating to Pocket-knives.
US2617187A (en) * 1949-10-01 1952-11-11 Hopta Joseph Foldable pocket tool
US4167811A (en) * 1978-03-13 1979-09-18 Imperial Knife Associated Companies, Inc. Folding knife
JPH07255957A (en) * 1994-03-24 1995-10-09 Koojitsuku:Kk Blade locking mechanism for knife of which blade can be put in
US6088861A (en) * 1999-01-29 2000-07-18 Buck Knives, Inc. Tool with locking fold-out implements
FR2804359A1 (en) * 2000-01-31 2001-08-03 Andre Louis Giorgifani Hunting knife with folding blade and triple safety locks in the general shape of a shotgun, which can be completely dismantled
FR2812230A3 (en) * 2000-07-27 2002-02-01 Christophe Caron Penknife blade locking system comprises rectangular metal part, housed under blade heel, having metal spindle passing through part and blade heel, part pivoting between two plates to lock blade

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191302872A (en) * 1913-02-04 1913-06-12 Ernst Kolfhaus Improvements in and relating to Pocket-knives.
US2617187A (en) * 1949-10-01 1952-11-11 Hopta Joseph Foldable pocket tool
US4167811A (en) * 1978-03-13 1979-09-18 Imperial Knife Associated Companies, Inc. Folding knife
JPH07255957A (en) * 1994-03-24 1995-10-09 Koojitsuku:Kk Blade locking mechanism for knife of which blade can be put in
US6088861A (en) * 1999-01-29 2000-07-18 Buck Knives, Inc. Tool with locking fold-out implements
FR2804359A1 (en) * 2000-01-31 2001-08-03 Andre Louis Giorgifani Hunting knife with folding blade and triple safety locks in the general shape of a shotgun, which can be completely dismantled
FR2812230A3 (en) * 2000-07-27 2002-02-01 Christophe Caron Penknife blade locking system comprises rectangular metal part, housed under blade heel, having metal spindle passing through part and blade heel, part pivoting between two plates to lock blade

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 02 29 February 1996 (1996-02-29) *

Also Published As

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FR2872079B1 (en) 2007-12-14
FR2872079A1 (en) 2005-12-30

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