Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
  • B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
  • B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
  • B24D15/084—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors the sharpening elements being fitted to knife sheaths, holders or handles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
  • B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
  • B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
  • B24D15/081—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact

Definitions

• the present invention relates to the field of blade sharpeners and relates in particular to sheaths for blades of scissors and kitchen knives, incorporating a sharpener.
• the first knife sharpeners were simple stones or guns requiring a certain mastery and dexterity on the part of the user, allowing the sharpening of the blade, and requiring knowledge of the sharpening angles.
• More complex knife sharpeners which attempt to simplify and facilitate their use for a novice user by allowing greater sharpening precision.
• these systems have the disadvantage of only sharpening one side of the blade at a time, or of causing premature wear of the blade.
• document FR2576537 discloses a sharpening sheath associated with a knife which makes it possible to simplify the sharpening operation.
• the invention relates to a sharpening sheath, adapted to receive a sharpening or storage knife, comprising a cavity intended to receive a blade, an access opening to one of the ends of the cavity, the sheath comprising, preferably in the vicinity of the access opening, an upper part provided with a device for guiding the back of the blade and a lower part comprising a sharpening device on which the cutting edge of the blade is intended to be applied during the insertion or the extraction of the blade in the sheath, characterized in that the guide device comprises a V-shaped groove and in that the sharpening device comprises two sharpening elements arranged in a V-shaped vis-à-vis the groove of the guide device, the sharpening device being mounted so as to move relative to the guide device and being returned by return means towards the guide device.
• sharpening elements arranged in a V and the V-shaped groove define, in combination, a diamond-shaped opening in which the end of the blade is introduced when the knife is stored in the sheath.
• this facing characteristic allows the sharpening angle to remain symmetrical and constant throughout the sharpening, that is to say during the friction of the blade against the sharpening elements.
• the device may also have one or more of the following characteristics, taken alone or in combination.
• the sharpening device is fixed to an arm mounted movable in rotation inside the sheath.
• Such a construction has the advantage of being simple and economical to produce and of allowing both a good hold and a large clearance of the sharpening device along the cutting edge of the blade.
• the two sharpening elements are arranged in two offset planes parallel to each other and perpendicular to the longitudinal axis of the sheath.
• the arm has a first longitudinal end which is pivotally mounted on a base.
• the return means comprise a return spring, preferably helical, interposed between the arm and a base.
• the sharpening elements are arranged in a sharpening device which is pivotally mounted at a second longitudinal end of the arm.
• Such a feature enables the sharpening of the blade to be optimized when the blade has a pronounced curvature, by allowing the sharpening device to pivot to follow a curved profile of the blade.
• the arm is mounted to pivot on the sleeve around a first pivot axis and the sharpening device is pivotally mounted on the arm around a second pivot axis, the first and second pivot axis being parallel.
• the sharpening device is arranged adjacent to the access opening.
• Such a feature makes it possible to sharpen the blade over substantially the entire length which is introduced into the sheath.
• the sheath comprises a base and a casing removably mounted on the base.
• Such a feature makes it possible to simplify the cleaning of the inside of the sheath.
• the invention also relates to a combination of a sharpening sheath as described above and of a knife intended to be sharpened or stored in this sheath.
• the sheath comprises a locking element cooperating with a safety notch provided on the back of the blade to immobilize the knife longitudinally in the sheath when the knife occupies a storage position in which the blade is introduced into the sheath.
• Figure 1 is a perspective view of a sheath and a knife according to a particular embodiment of the invention; the knife being shown on the outside of the scabbard.
• Figure 2 is an exploded perspective view of the sleeve of Figure 1;
• FIG. 3 is a perspective view of the sheath of FIG. 1 with the knife inserted into the sheath, the sheath being in this figure shown without its outer casing in order to allow visual access to the mechanism of the sheath;
• Figure 4 is a longitudinal sectional view of the sheath and the knife in the position shown in Figure 3;
• Figure 5 is a bottom view of the removable casing of the sheath
• FIG 6 Figure 6 is another perspective view of the sheath of Figure 1 without its knife;
• Figure 7 is a sectional view along the line VII-VII of Figure 4;
• Figure 8 is an exploded perspective view of the sharpening device fitted to the sheath.
• Figures 1, 3 and 4 show a sharpener scabbard 1 and a kitchen knife 2 comprising a blade 20 intended to be stored in the scabbard 1, the knife 2 conventionally comprising a handle 21 which protrudes outside the scabbard 1 when the blade 20 is stored in the sheath 1.
• the sheath 1 comprises a base 3 and a casing 4 fixed one on the other, and advantageously made of plastic material.
• the base 3 and the casing 4 have an elongated shape defining a cavity 40 intended to receive the blade 20 of the knife 2 for its storage, the sheath 1 having a rear end provided with an access opening 10 through which the blade 20 of the knife 2 can be introduced into the cavity 40.
• the casing 4 has, upstream of the access opening 10, a guide skirt 41 which has walls which converge in the direction of the access opening 10 and make it possible to guide the tip of the blade 20 of the knife 1 towards the access opening 10.
• the base 3 comprises a base 30 comprising a lower face intended to rest flat on a support and comprises a front end formed by a grid 31 which s 'extends upwards from the base 30, forming an angle of the order of 65 ° relative to the underside of the base 30, the grid 31 closing the front end of the sleeve 1 and being advantageously obtained by molding with base 30.
• the casing 4 is advantageously fixed in a removable manner on the base 3 and has a cross section in the shape of an inverted U, visible in FIG. 5, comprising, at each of its ends, a rib 42 which engages in a groove of guide 32 provided longitudinally on each of the sides of the base 30 of the base 3.
• the sheath 1 comprises a device for guiding the upper part of the blade 20 of the knife 2, also called the back of the blade 20, comprising a guide piece 5 fixed inside the casing 4, at its curved part defining the top of the casing 4, the guide piece 5 extending in the longitudinal axis of the sleeve 1 from the open end of the sleeve 1 to the grid 31 defining the front end of sleeve 1.
• the guide piece 5 comprises an opening 51 in the vicinity of its front end, in which engages a hook 45 carried by the casing 4, visible in Figures 2 and 4, the front end of the guide piece 5 comprising a head 52 which projects upwards and which engages in a suitable notch 44 made at the front end of the casing 4.
• the guide piece 5 is advantageously fixed to the rear end of the casing 4 by clipping, the rear end of the guide piece 5 comprising a centering ring 50 which is elastically engaged between two locking clips 43 protruding. on the edges of the access opening 10 of the sleeve 1.
• the head 52 of the guide part 5 engages longitudinally in a notch 33 provided at the upper end of the grid 31 when the casing 4 is placed on the base. 3, the head 52 having an underside comprising a groove 53 in which elastically engages a locking tab 34 arranged at the base of the notch 33, making it possible to keep the casing 4 in position on the base 3.
• the centering ring 50 has a groove 54 in the form of an inverted V ensuring the centering of the back in the blade 20 relative to the casing 4 when the blade 20 is inserted into the sheath 1.
• the sheath 1 comprises, facing the centering ring 50, a sharpening device 6 advantageously carried by an arm 7 pivotally mounted on the base 3, the sharpening device 6 being returned in the direction of the ring centering 50 by a return spring 8 acting on the arm 7.
• the arm 7 is movable in the plane of the blade 20 between a high position where the return spring 8 is deployed to its maximum and a low position where the return spring 8 is compressed to its maximum.
• the arm 7 has a first end, called the front end, pivotally mounted in the vicinity of the front end of the base 3, by means of a first axis 71 extending perpendicularly to the longitudinal direction of the base 3.
• the first axis 71 is supported by two side partitions 35 extending vertically on either side of the front end of the arm 7, these side partitions 35 contributing to the rigidity of the connection between the base 30 and the grid 31.
• the arm 7 has a second end, called the rear end, on which the sharpening device 6 is preferably mounted so as to pivot about a second axis 72 extending parallel to the first axis 71, the device being able to pivot relative to the arm. 7 over an angular range of at least 15 ° and preferably of the order of 30 °.
• the arm 7 comprises two lateral tabs 73 which protrude towards the rear of the arm 7 and between which the sharpening device 6 is disposed, the second axis 72 being advantageously formed by cylindrical pins. of circular section which protrude laterally from the device sharpening 6 and which are engaged in circular openings made in the side tabs 73.
• the sharpening device 6 comprises a U-shaped body supporting two sharpening elements 60 arranged so as to form a V in a projection plane perpendicular to the longitudinal axis of the sleeve 1 , that is to say when the sharpening device 6 is seen in the direction of introduction of the blade 20 into the access opening 10 of the sheath 1, the two sharpening elements 60 being offset on the axis longitudinal of the sleeve 1 and each extending in a plane perpendicular to the longitudinal axis.
• the two sharpening elements 60 are arranged in two housings 61 arranged to hold two sharpening elements 60 in the V-shaped arrangement, the sharpening device 6 comprising a slot 63, formed between the two branches U-shaped, freeing access to the space between the two sharpening elements 60.
• the two sharpening elements 60 are immobilized by friction inside their housing 61 thanks to the support of a part of the body of the device. 'sharpening 6, not visible in the figures, against the end of the sharpening element 60.
• the sharpening elements 60 do not rotate in their housing 61, where then weakly, when subjected to the friction of the blade 20 during the introduction or extraction of the latter in the sheath 1.
• the return spring 8 is a helical spring arranged between the base 3 and the underside of the arm 7, in the vicinity of the rear end of the arm 7.
• the base 3 comprises a cup 36 for maintaining the lower end of the return spring 8
• the underside of the arm 7 comprises a cup 74 for maintaining the upper end of the return spring 8, the cup 74 coming opposite the cup 36 when the arm 7 is brought in the direction of the base 3.
• the back of the blade 20 of the knife 2 comprises a safety notch 22, preferably arranged in the vicinity of the handle 21 of the knife 2, in which a locking element 55 engages, constituted by the bottom of the groove 54 when the entire blade 20 is inserted by the sheath 1, as illustrated in Figures 3 and 4.
• a safety notch 22 preferably arranged in the vicinity of the handle 21 of the knife 2, in which a locking element 55 engages, constituted by the bottom of the groove 54 when the entire blade 20 is inserted by the sheath 1, as illustrated in Figures 3 and 4.
• This double positioning of the cutting part of the blade 20 and of the blade back 20 makes it possible to obtain a sharpening angle which remains symmetrical and constant throughout the path of the blade 20 in the sheath 1, without the user does not need to manually orient the blade 20.
• the symmetry of the sharpening is guaranteed and the sharpening angles are equal on each side of the edge of the blade, which allows a uniform and centered wear of the blade. blade 20.
• the pivoting movement of the arm 7 allows the sharpening device 6 to follow the profile of the cutting part of the blade 20 , the sharpening device 6 exerting, under the effect of the return spring 8, moderate pressure on the cutting part of the blade 20 when the tip of the blade is introduced into the access opening 10 of the sheath 1 then more and more pressure as the height of the blade increases 20 te when the knife 2 is introduced into the sheath 1.
• the significant friction between the cutting part of the blade 20 and the sharpening elements 60 causes the sharpening of the blade 20.
• the sharpening elements being placed one behind the other, in the sense introduction of the blade 20, the possible oscillation of the sharpening device 6 with respect to the second end of the arm 7 allows the sharpening elements 60 to remain in permanent contact with the blade 20 and to remain correctly oriented with respect to that here, which makes it possible to optimize the sharpening of the blade 20.
• the locking element 55 of the centering ring 50 is introduced into the notch 22 safety provided on the back of the blade 20, under the effect of the return spring 8. The knife 2 is then held securely in the sheath 1.
• the user To extract the knife 2 from the sheath 1, the user must in a firstly exert downward pressure on the handle 21 of the knife 2 to release the locking element 55 from the safety notch 22, then exert a traction on the handle 21 of the knife 2 to extract the blade 20.
• a such handling avoids any accidental drop in cost to 2 which could occur for example when the sheath 1 is handled for its transport.
• the sleeve 1 thus produced also has the advantage of allowing easy cleaning of the inside of the sleeve 1.
• the user can easily disconnect the casing 4 from the base 3 while maintaining the base 3 with a hand, after having withdrawn the knife 2, then by exerting a traction on the casing 4 so that the groove 53 disengages, by elastic deformation of the head 52, the locking tab 34 arranged at the top of the grid 31 He can then slide the casing 4 on the base 3, each guide groove 32 of the base 3 having, on the side of the access opening 10, an open longitudinal end allowing the extraction of the rib 42 of the. envelope 4. After having cleaned the inside of the sheath 1, he can reassemble the envelope 4 on the base 3 by carrying out the operations described above in reverse order.
• the invention is in no way limited to the embodiment described and illustrated which has been given only by way of example. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.
• the casing may not be removable from the base, the base and the casing of the sheath may for example be produced in one piece.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Knives (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Food-Manufacturing Devices (AREA)
• Removal Of Insulation Or Armoring From Wires Or Cables (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=71094547

Family Applications (1)

Country Status (10)

Families Citing this family (5)

Family Cites Families (29)

• 2020
  • 2020-04-14 FR FR2003708A patent/FR3109110B1/fr active Active
• 2021
  • 2021-03-05 CN CN202180028125.3A patent/CN115397618B/zh active Active
  • 2021-03-05 US US17/918,383 patent/US12496687B2/en active Active
  • 2021-03-05 JP JP2022562414A patent/JP7550876B2/ja active Active
  • 2021-03-05 EP EP21709041.4A patent/EP4135930A1/de active Pending
  • 2021-03-05 KR KR1020227035261A patent/KR20220164510A/ko active Pending
  • 2021-03-05 AU AU2021257539A patent/AU2021257539A1/en active Pending
  • 2021-03-05 WO PCT/EP2021/055681 patent/WO2021209194A1/fr not_active Ceased
  • 2021-03-05 CA CA3173816A patent/CA3173816A1/fr active Pending
• 2022
  • 2022-09-28 CO CONC2022/0013853A patent/CO2022013853A2/es unknown

Also Published As

Similar Documents

Legal Events