EP3827938B1 - Couteau - Google Patents

Couteau Download PDF

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Publication number
EP3827938B1
EP3827938B1 EP20206852.4A EP20206852A EP3827938B1 EP 3827938 B1 EP3827938 B1 EP 3827938B1 EP 20206852 A EP20206852 A EP 20206852A EP 3827938 B1 EP3827938 B1 EP 3827938B1
Authority
EP
European Patent Office
Prior art keywords
blade holder
blade
spring
housing
stop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20206852.4A
Other languages
German (de)
English (en)
Other versions
EP3827938A1 (fr
Inventor
Kerry Henn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Martor KG
Original Assignee
Martor KG
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 Martor KG filed Critical Martor KG
Publication of EP3827938A1 publication Critical patent/EP3827938A1/fr
Application granted granted Critical
Publication of EP3827938B1 publication Critical patent/EP3827938B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B5/00—Hand knives with one or more detachable blades
    • B26B5/001—Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • 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
    • B26B5/003—Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use comprising retraction means for the blade or the blade holder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B9/00—Blades for hand knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/08—Hand knives with adjustable blade; Pocket knives with sliding blade

Definitions

  • the invention relates to a knife.
  • a knife is from the DE 10 2016 008 724 A1 known. It includes a housing and a blade holder movable in the housing between a rear position and a cutting position.
  • a return device in the form of a spring loads the blade holder into the rear position. In the rear position, the blade is retracted into the housing so far that the user cannot come into contact with the cutting edge and therefore cannot injure himself. In the cutting position, the blade protrudes from a front opening of the housing, so that a cutting process is possible.
  • the object of the invention to design the resetting device in such a way that it can be produced inexpensively.
  • the resetting device should allow easy assembly of the knife.
  • the restoring device should be designed in such a way that the restoring force can be varied by a simple change in construction.
  • the knife includes a housing and a blade holder movable within the housing between a first position and a second position.
  • the first position is, for example, a rear safety position in which the blade is arranged in the housing so that a user cannot come into contact with the edge of the blade.
  • the second position is, for example, a blade changing position, in which the blade emerges from the housing in such a way that a blade change is possible.
  • the second position can also be a cutting position, for example, in which the blade is moved far enough out of the housing that a cutting process is possible.
  • the movement of the blade carrier can, for example, be translatory, rotatory or of a mixed nature with translatory and rotatory components.
  • the blade carrier may be movable in a straight or curved path.
  • the knife includes a restoring device with a spring, with which the blade holder can be loaded into the first position relative to the housing.
  • the housing can have several parts. In particular, if these are designed to be immovable relative to other housing parts and are firmly connected to them, they should fall under the term “housing” below.
  • the restoring device comprises first restoring means and second restoring means.
  • the first restoring means are mounted on the housing or on the blade holder.
  • the second restoring means are mounted on the other element, ie on the blade holder or the housing.
  • the first restoring means comprise a movable element and a spring.
  • the movable element is connected to the spring and is loaded by the spring in a direction of movement.
  • the movable element can, for example, carry out a rotary movement, a translational movement or a mixed movement with rotational and translational components.
  • the movable element cooperates with the blade holder and with the housing and loads the blade holder in at least a range of movement of the blade carrier towards the rear position.
  • the movable element has, for example, a contact surface which is in contact with a counter surface of the housing or the blade holder and is movable relative to the counter surface.
  • the second restoring means comprise the counter surface. If, for example, the first restoring means on the Blade holder are stored, the contact surface is in contact with the second return means of the housing. If the first restoring means are mounted on the housing, the contact surface is in contact with the second restoring means of the blade holder.
  • the mating surface has, for example, at least two areas, with a second area being oriented differently from a first area.
  • the elastic element is in engagement with one of the at least two areas of the mating surface.
  • the counter surface forms a slideway and the contact surface is a sliding surface.
  • the contact surface could be formed on a rolling element and the counter-surface forms a rolling track.
  • the contact surface may be formed on a projection of the movable member.
  • the spring is designed, for example, as a compression spring or as a tension spring. Such springs are available inexpensively in different sizes on the market. In particular, a tension spring is easy to store and easy to attach to the components to be loaded.
  • a spring is any device made of an elastically deformable material that exerts a restoring force after deformation. As far as this property is fulfilled, the term is independent of the shape and the material of the device.
  • the spring can be made of spring steel, a plastic or a natural material, for example.
  • the moveable element cooperates, for example, with different aligned surfaces of the housing or the blade holder, which form the mating surface.
  • the orientation of the face is given below with the direction of the surface orthogonal.
  • the orientation of the different surface areas can be such that different proportions of the spring force act on the blade carrier in the retraction direction (direction of the first position).
  • a first force acts in the retraction direction on the blade carrier and between the intermediate position and the second position a second force or no force acts in the retraction direction on the blade carrier.
  • the first force differs from the second force.
  • the blade carrier may be movable between a first safety position, a cutting position, and a second blade-changing position.
  • the position of the blade carrier controls the contact of the movable element with the respective area of the mating surface.
  • the movable element when moving the blade carrier between the rear position and the cutting position, can be in contact with a counter surface which biases the blade carrier into the rear position. In the blade-changing position, the movable element can be in contact with a counter-surface in such a way that the blade carrier is not loaded, or loaded only with a small force, in the retraction direction, so that no movement takes place. This can be the case, for example, when the blade carrier is loaded in a direction in which it has no degree of freedom.
  • the blade acting on the blade carrier in the retraction direction can be smaller than in a first area.
  • the first area includes, for example, the security position.
  • the second area includes, for example, the cutting position.
  • a first surface e.g., a surface of the blade carrier or the housing, which is in contact with the movable element, is directed towards the direction of movement of the blade holder, for example such that the blade holder is biased into the rear position.
  • the surface orthogonal is directed parallel to the direction of movement of the blade holder or has portions so directed.
  • a second surface e.g.
  • the surface orthogonal is directed perpendicularly to the direction of movement of the blade holder, or has portions so directed. If the surface orthogonal is directed perpendicularly to the direction of movement of the blade holder, the movable element cannot transmit any force towards the rear position on the blade holder. Therefore, the blade holder remains in the adjusted position. In this case, part of the spring force is directed in a direction other than the return direction and is absorbed by the housing, for example.
  • the counter-surface is designed, for example, as a control surface, which is traversed by the movable element during the movement of the blade carrier between the rear position and the blade-changing position. At least two differently aligned surfaces are formed, for example, on a counter surface.
  • the first restoring means are mounted on the housing or the blade holder and the mating surface of the second restoring means is mounted on the other part, ie the blade holder or the housing.
  • a guide element of the movable element can be guided on the counter surface.
  • the Blade holder loaded with full spring force in the rear position when the spring force is fully on the blade holder in the retracting direction, loaded with less force in the rear position when only part of the spring force is on the blade holder in the retracting direction, or not in the rear position at all loaded when the spring force is not acting on the blade holder in the retraction direction.
  • spring force is the spring force transmitted from the movable element to the blade carrier.
  • the movable element is formed, for example, by a lever, for example by a two-armed lever.
  • the lever is pivotable about a fixed pivot axis or pivotable about a movable pivot axis.
  • a lever arm includes the contact surface.
  • a second lever arm is loaded by the spring.
  • the spring and the moveable member are attached to the blade holder, with one spring end of the spring connected to the blade holder and another spring end connected to the moveable member.
  • the spring and the movable element are fixed to the housing and one spring end of the spring is connected to the housing and another spring end is connected to the movable element.
  • the housing is provided, for example, with at least one first stop and the blade holder with a counter stop.
  • the contact between the stop and the counterstop determines the cutting position, for example. This means that the blade holder can only be moved from the rear position in the direction of the cutting position until the stop and the counter-stop are in contact and thus define the cutting position.
  • the housing is provided with a second stop which contacts the counter stop in a blade changing position and prevents further movement in the direction of movement opposite to the rear position.
  • the blade carrier In the blade-changing position, the blade carrier is moved beyond the cutting position with respect to the rear position, for example.
  • a stop of the housing which defines the cutting position
  • a stop which defines the blade changing position
  • a second movement path for example, an area of the blade carrier is mounted so that it can be flexibly moved in such a way that the counter-stop can be moved between the first path of movement and the second path of movement.
  • the counter-stop can be shifted between the movement paths by means of an actuation, for example. Then, when the counter-stop moves on the first path of movement, the movement is limited by the first stop, when the counter-stop moves on the second path of movement, the movement is limited by the second stop.
  • the first trajectory and the second trajectory can be separated from one another by a wall in such a way that the counter-stop cannot move between the first trajectory and the second trajectory, at least in one range of movement.
  • the counter-stop in the rear position, can be moved between the first path of movement and the second path of movement.
  • the knife as a whole is denoted by the reference numeral 10 in the figures.
  • a first embodiment of the knife 10 comprises according to 1 a housing 11 with a first housing part 12 and a second housing part 23.
  • the knife 10 also includes a blade holder 13 with a blade 14 which is provided with a cutting edge 25.
  • the housing part 23 is designed as a sleeve and comprises a front opening 15 and a rear opening 16.
  • a central longitudinal axis of the blade 10 is denoted by m.
  • recesses 17a and 17b are also formed on both sides in the housing part 23 on a front end region 18 of the knife 10 .
  • Two recesses are provided in the housing part 23 at a rear end region 19 of the knife 10, one recess 20 for the actuation of an actuating element 21 and another recess 22 forming a through-opening which is used for hanging the knife 10.
  • the housing part 23 is formed by a sheet metal part, but it can also be made from other materials and have a different shape.
  • the invention does not depend on the material and the external shape of the housing, as will become clear below.
  • the blade holder 13 is in the rear position.
  • the blade holder 13 can be displaced relative to the housing 11 from the rear position in direction x1 to a cutting position shown in 2 is shown.
  • the blade holder 13 Upon release of the force on the blade holder 13, the blade holder 13 is automatically moved to the rear position by a return device 34 when it is in a position between the rear position and the cutting position, including the cutting position.
  • the blade holder 13 has a structure 24 on both sides of its front end area, which gives the fingers a good hold.
  • the blade holder 13 has an inclined recess 26 through which a portion of the cutting edge 25 of the blade 14 is exposed.
  • the knife 10 has a rectangular blade 14, but in principle any shape of blade, such as a trapezoidal blade, hooked blade, etc., can be used.
  • the housing part 23 forms bulges 54, which form recesses in the interior of the housing part 23, in which the housing part 12 can be latched.
  • the blade holder 13 is moved beyond the cutting position in direction x1 to a blade changing position.
  • the blade carrier 13 can only be moved beyond the cutting position if the actuating element 21 has been actuated beforehand.
  • the blade holder 13 comprises, in a known manner, a base part 27 in which a blade seat 29 is formed, and a cover part 28 which, together with the base part 27, forms a swivel joint G1.
  • the blade 14 is held between the base part 27 and the cover part 28 .
  • the blade 14 is provided with a slot-shaped opening 30 and the blade seat 29 comprises a complementary projection 31 which can reach through the blade 14 and dip into a recess 32 of the cover part 28 when the cover part 28 is in the closed position .
  • the blade 14 can be held in the blade holder 13 in a form-fitting manner. If the cover part 28 is in the open position, it is a removal the blade 14 from the blade seat 29 and the exchange for a new blade 14 is possible.
  • FIG 4 shows the knife 10 without the housing 11, the blade holder 13 according to FIG 1 is in the rear position.
  • a return device 34 biases the blade holder 13 to the rearward position when the blade holder 13 is in the rearward position, the cutting position, or between the foregoing positions.
  • First return means of the return device 34 include a spring 35 in the 4 , 5 and 6 is only indicated by a chain line.
  • the first restoring means of the restoring device 34 include a movable element, here in the form of a lever 36.
  • the restoring device 34 includes a tension spring in the form of a helical spring. This is connected to a spring attachment 37 of the base 12 with one spring end and to a spring attachment 38 of the lever 36 with another spring end.
  • the lever 36 is pivoted about a pivot axis a2 in the directions u1 and u2 on the base 12 and forms a pivot joint G 2 with the base 12 .
  • the spring 35 loads the lever 36 in direction u2. In the rear position according to 4 subject to the spring 35 is biased.
  • the lever 36 includes a projection 40, which is designed as a cylindrical pin in the present embodiment, but can also be of a different shape.
  • An outer surface 41 of the projection 40 is in contact with a mating surface 42 of the blade holder 13 .
  • the counter-surface is surrounded by second restoring means.
  • the mating surface 42 forms a control surface with which, depending on the position of the projection 40 relative to the mating surface, the proportion of the spring force of the spring 35 can be influenced, which loads the blade holder 13 in direction x2.
  • the mating surface 42 of the blade holder 13 comprises a surface area 43 whose surface orthogonal is directed approximately parallel to the directions of movement x1 and x2 of the blade holder 13 .
  • the mating surface 42 includes a surface area 45, the surface orthogonal of which is directed approximately at right angles to the directions of movement x1 and x2.
  • a transition area 44 has an angle of approximately 45° to area 43 and to area 45 .
  • the transition area 44 is arranged between the surface areas 43 and 45 with respect to the directions of movement of the projection 40 along the control surface 42 .
  • the cutting position is reached when an extension 49 of the blade holder 13 on a first trajectory in contact with a Counter surface of a first stop 48 of the base 12 has moved into contact.
  • the projection 48 can be moved elastically by means of the actuating element 21 in direction y1 onto a second path of movement, which is separated from the first path of movement by a wall 55 .
  • the blade holder 13 is then on the second path of movement according to the blade changing position 6 movable.
  • the movement of the blade holder 13 in direction x1 is limited by the contact of the surface of the extension 49 with a holding surface of a second stop 50. If the blade holder 13 is moved back to the rear position in direction x2, the extension 49 automatically moves again due to its elastic restoring force on the first trajectory.
  • the projection 40 slides from the first area 43 via the transition area 44 to the second area 45.
  • the surface orthogonal of the second area 45 is directed at right angles to the movement directions x1, x2 of the blade holder 13. so that no forces can be transferred from the lever 36 to the blade holder 13 which would load the blade holder in the direction x2.
  • the blade change can therefore be carried out without the blade holder 13 having to be held in the blade change position against the spring force of the spring 35 .
  • the spring force which is transmitted from the lever 36 to the blade carrier, is absorbed by the housing part 23 in this position of the projection 40 .
  • the blade holder 13 When the blade change is complete, the blade holder 13 is manually moved from the blade change position relative to the base 12 in direction x2. The projection 40 then slides in the reverse direction from the area 45 of the mating surface 42 via the transition area 44 to the Area 43.
  • the transition area 44 When the transition area 44 is reached, the lever 36 again exerts a force in the direction x2 on the blade holder 13, so that the further movement of the blade holder 13 in the direction x2 until the rear position is reached can no longer be actively carried out by the user must, but takes place automatically by the restoring force of the spring 35, which loads the lever 36 in direction u2.
  • the rear position is reached when the stop shoulders 46 hit the surfaces 47 of the second housing part 23 .
  • the assembly of the knife is carried out, for example, as follows.
  • the lever 36 is slipped onto a pin 51 of the base 12 forming the pivot axis a2.
  • Spring 35 is attached to lever 36 and base 12 .
  • the cover part 28 is mounted on the base part 27 of the blade holder 13, the cover part 28 is mounted.
  • the blade holder 13 is pushed into the base 12 and the projection 40 of the lever 36 is brought into abutment with the area 45 . By pushing it in further in direction x2, it comes into contact with the transition area 44, whereupon the blade holder 13 automatically moves into the rear position.
  • the assembly of base 12 and blade holder 13 can be inserted into the rear opening 16 of the housing 11 until a stop surface 52 of the base 12 abuts a rear face 53 of the housing 11 and the housing part 12 is locked to the housing part 23.
  • the blade 14 can then be installed by moving the blade holder 13 to the blade changing position as described above.

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

Claims (12)

  1. Couteau avec un boîtier (11) et un porte-lame (13) pouvant se déplacer entre une première position et une deuxième position dans le boîtier (11), avec un dispositif de rappel (34) avec lequel le porte-lame (13) est maintenu dans la position arrière par rapport au boîtier sur au moins une plage du déplacement du porte-lame (13), caractérisé en ce que le dispositif de rappel (34) présente des premiers moyens de rappel qui comprennent un ressort (35) ainsi qu'un élément mobile (36) qui est relié au ressort et est sollicité le ressort dans une direction de déplacement, les premiers moyens de rappel étant montés sur le boîtier (11) ou sur le porte-lame (13), l'élément mobile interagissant avec au moins une surface opposée (42) du porte-lame (13) ou du boîtier (11), laquelle surface opposée (42) est composée de deuxièmes moyens de rappel, et l'élément mobile étant mobile par rapport à la surface opposée (42).
  2. Couteau caractérisé en ce que le ressort (35) est configuré comme un ressort de compression ou comme un ressort de traction.
  3. Couteau selon la revendication 1, caractérisé en ce que l'élément mobile interagit avec au moins une surface opposée, une première surface (43) étant orientée par rapport à la direction de déplacement (x1, x2) du porte-lame (13) de telle sorte que le porte-lame (13) est maintenu dans la position arrière par une première force qui est située sur une première échelle de force.
  4. Couteau selon la revendication 3, caractérisé en ce qu'une deuxième surface (45) est orientée par rapport à la direction de déplacement (x1, x2) du porte-lame (13) de telle sorte que le porte-lame (13) est maintenu dans la position arrière par une deuxième force située sur une deuxième échelle de force qui est en particulier nulle ou inférieure à la première force, la deuxième échelle de force se distinguant de la première échelle de force.
  5. Couteau selon une des revendications précédentes, caractérisé en ce qu'à la surface opposée (42) est associée une piste de commande qui doit être parcourue pendant le déplacement du porte-lame (13) entre la position arrière et la position de changement de lame.
  6. Couteau selon une des revendications précédentes, caractérisé en ce que l'élément mobile est constitué par un levier (36), en particulier un levier à deux bras.
  7. Couteau selon une des revendications précédentes, caractérisé en ce que le ressort (35) et l'élément mobile sont fixés sur le porte-lame (13) et qu'une extrémité de ressort du ressort (35) est reliée au porte-lame (13) et une autre extrémité de ressort à l'élément mobile.
  8. Couteau selon une des revendications 1 à 6, caractérisé en ce que le ressort (35) et l'élément mobile sont fixés sur le boîtier (11) et qu'une extrémité de ressort du ressort (35) est reliée au boîtier (11) et une autre extrémité de ressort à l'élément mobile.
  9. Couteau selon une des revendications précédentes, caractérisé en ce que le boîtier est doté d'une première butée (48) et d'une deuxième butée (50) et le porte-lame (13) d'une contrebutée (49), le contact de la première butée (48) et de la contrebutée (49) définissant la position de coupe et le contact de la deuxième butée (50) et de la contrebutée (49) définissant la position de changement de lame.
  10. Couteau selon la revendication 9, caractérisé en ce que la contrebutée peut se déplacer sur une première piste de déplacement jusqu'à la première butée et sur une deuxième piste de déplacement jusqu'à la deuxième butée.
  11. Couteau selon la revendication 10, caractérisé en ce que la première piste de déplacement et la deuxième piste de déplacement sont séparées sur une section du déplacement de la contrebutée (49) par une paroi (55).
  12. Couteau selon une des revendications 10 ou 11, caractérisé en ce que la contrebutée (49) et/ou la paroi (55) sont montées de façon flexible de sorte que la contrebutée (49) peut se déplacer entre la première piste de déplacement et la deuxième piste de déplacement.
EP20206852.4A 2019-11-21 2020-11-11 Couteau Active EP3827938B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019131546.8A DE102019131546A1 (de) 2019-11-21 2019-11-21 Messer

Publications (2)

Publication Number Publication Date
EP3827938A1 EP3827938A1 (fr) 2021-06-02
EP3827938B1 true EP3827938B1 (fr) 2022-07-20

Family

ID=73343861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20206852.4A Active EP3827938B1 (fr) 2019-11-21 2020-11-11 Couteau

Country Status (5)

Country Link
US (1) US11453135B2 (fr)
EP (1) EP3827938B1 (fr)
CN (1) CN112824066B (fr)
DE (1) DE102019131546A1 (fr)
ES (1) ES2927399T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019131546A1 (de) * 2019-11-21 2021-05-27 Martor Kg Messer

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19723279C1 (de) * 1997-06-04 1998-04-23 Beermann Kg Martor Argentax Messer
FR2810574B1 (fr) * 2000-06-27 2002-10-31 Mure & Peyrot Cutter a lame retractable automatiquement
FR2826898B1 (fr) * 2001-07-06 2003-09-19 Gerard Tremblay Dispositif de coupe a lame retractable
DE102004063045B3 (de) * 2004-12-22 2006-06-08 Martor Kg Messer
DE202004020044U1 (de) * 2004-12-22 2006-04-27 Martor Kg Messer
JP4851242B2 (ja) * 2006-06-06 2012-01-11 オルファ株式会社 セーフティカッターナイフ
DE102007052060A1 (de) * 2007-10-30 2009-05-07 Martor Kg Messer
DE102008019441A1 (de) * 2008-04-17 2009-10-22 Martor Kg Messer
US8732957B2 (en) * 2008-04-17 2014-05-27 Martor Kg Retractile-blade utility knife
DE102010019119B8 (de) 2010-04-30 2013-01-31 Wilfried Gorski Cuttermesser
DE102010023680A1 (de) * 2010-06-14 2011-12-15 Martor Kg Messer
DE102010023906A1 (de) 2010-06-16 2011-12-22 Martor Kg Messer
DE102011007234B3 (de) * 2011-04-12 2012-09-20 Martor Kg Sicherheits-Messer
TWI466763B (zh) * 2012-08-21 2015-01-01 Hacksaw & Knife Manufactory Co Ltd The blade automatically retracts the utility knife
DE102016000724A1 (de) 2016-01-23 2017-07-27 Audi Ag Vorrichtung zur Gasdruckregelung für den Innenraum eines auf einer Felge befestigten Reifens
DE102016008724A1 (de) 2016-07-21 2018-01-25 Martor Kg Messer
DE102017009630B4 (de) * 2017-10-16 2019-08-08 Martor Kg Messer
DE102019131546A1 (de) * 2019-11-21 2021-05-27 Martor Kg Messer

Also Published As

Publication number Publication date
ES2927399T3 (es) 2022-11-04
CN112824066B (zh) 2022-11-08
EP3827938A1 (fr) 2021-06-02
DE102019131546A1 (de) 2021-05-27
US11453135B2 (en) 2022-09-27
CN112824066A (zh) 2021-05-21
US20210170611A1 (en) 2021-06-10

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