Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
  • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
  • B26B19/3853—Housing or handle
  • B26B19/386—Means for attaching the head thereto
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
  • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
  • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
  • B26B19/3806—Accessories
  • B26B19/3813—Attachments
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
  • B26B21/40—Details or accessories

Definitions

• the first and second inclined surfaces When rotating the coupling elements about the central axis, the first and second inclined surfaces will at least be moved in the tangential direction and, depending on the rotational direction, one of the first and second inclined surfaces will slide over the respective one of the first and second co-operating surfaces in the axial direction.
• the size of the obtuse angle will be one of the parameters defining the relation between the size of the torque and the amount of the corresponding displacement in axial direction.
• the obtuse angles included by the first and second inclined surfaces with the tangential direction may be equal or may be different from each other.
• the first and second inclined surfaces and the first and second co-operating surfaces have corresponding inclinations.
• the first and second inclined surfaces each include a further obtuse angle with a radial direction extending radially to the central axis.
• the first and second inclined surfaces each include an obtuse angle with the tangential direction and a further obtuse angle with the radial direction.
• the obtuse angle and the further obtuse angle may be equal or different.
• the inclined surfaces are straight longitudinal surfaces extending tangentially with respect to a reference plane extending in a reference radial direction to the central axis. Seen in said reference plane the inclined surfaces only include an obtuse angle with the reference radial direction. At a distance from said reference plane and at both sides thereof, however, the inclined surfaces extend obliqueally with respect to a local radial direction.
• the inclined surfaces also include an obtuse angle with respect to a local tangential direction.
• Such inclined surfaces can easily be manufactured.
• the inclined surfaces may extend over a certain distance in a direction perpendicular to the radial direction.
• Such inclined surfaces will also be an external orientation cue for a user supporting the user when coupling the coupling elements to each other.
• the inclined surfaces extend relatively far from the central axis, the forces, friction and wear on the inclined surfaces will be relatively low and it will provide more easily rotational stability.
• the coupled coupling elements can be brought from the coupled state into the uncoupled state by driving the coupled coupling elements away from each other in the axial direction along the central axis. Due to the presence of the inclined surfaces and the co-operating surfaces, this can easily be accomplished by rotating the coupled coupling elements with respect to each other about the central axis in either the first or the second rotational direction.
• one of the first and second coupling elements comprises at least one protrusion cooperating with at least one complementary recess in the other of the first and second coupling elements, wherein the coupling elements can be coupled to each other only if the protrusion is located in the recess.
• the combination of the protrusion and the recess defines a preferred and desired orientation of the coupling elements to each other. For a user this combination provides a tactile feedback, which is helpful when coupling the coupling elements to each other. Preferably the combination of the protrusion and the recess is visible for the user.
• a position and an inclination of the first and second inclined surfaces is selected such that the first coupling element and the second coupling element arrive from the coupled state into the uncoupled state by rotating the coupled coupling elements with respect to each other about the central axis in either the first or the second rotational direction over an angle smaller than 90°.
• one of the first and second coupling elements comprises a spring element extending perpendicularly to the central axis for cooperation with a groove extending perpendicularly to the central axis and provided in the other of the first and second coupling elements for releasably retaining the coupling elements when coupled to each other.
• the spring element retains the coupling elements in a coupled position by cooperation with the groove.
• the user may release the coupling elements against the spring force, in particular by driving the coupling elements away from each other in the axial direction, preferably by mutually rotating the coupling elements about the central axis.
• Figure 1 shows a perspective view of a shaving device according to the invention
• Figure 2 shows a perspective view of a part of the shaving device as shown in figure 1,
• Figure 3 A shows a perspective view of a first embodiment of two cooperating coupling elements according to the invention, in an uncoupled position
• Figure 3B shows a schematic top view of one of the two cooperating coupling elements as shown in figure 3A
• FIGS 4A-4D show perspective views of two coupling elements as shown in figure 3, in several steps during coupling of the two coupling elements,
• Figure 5A and 5B show a perspective view and a cross section of two coupling elements as shown in figure 3, in a coupled position
• Figure 6 shows a perspective view of a second embodiment of two cooperating coupling elements according to the invention, in an uncoupled position
• Figures 7A-7B show perspective views of two coupling elements as shown in figure 6, in two steps during coupling of the two coupling elements
• Figure 8 shows a perspective view of two coupling elements as shown in figure 6, in a coupled position.
• Figures 1 and 2 show respectively a perspective view of a shaving device 1 and a part thereof as an example of a personal care device according to the invention.
• the shaving device 1 comprises a base structure 2 and a head structure 3.
• the head structure 3 supports and retains three head support structures 4 for rotary shaving heads 4' as an example of a treatment head.
• the head structure 3 comprises a first coupling element 5, whilst the base structure 2 comprises a second coupling element 6.
• the first coupling element 5 is partly inserted into the second coupling element 6 and is retained in the second coupling element 6 by means of a spring element 7.
• Such kind of shaving device 1 is known from EP2086729B1 and will not further be explained.
• the shaving device 1 according to the invention differs from the shaving device 1 as described in EP2086729B1, mainly by the design and function of the coupling elements 5, 6.
• Figures 3A-5B show several views of a first embodiment of two cooperating coupling elements 5, 6 of the shaving device 1 according to the invention.
• the first coupling element 5 comprises a tubular part 8 extending along a central axis 9.
• the tubular part 8 is provided with a ring-shaped collar 10.
• the ring-shaped collar 10 has a circular part 11 extending over 180 degrees along the central axis 9, straight parts 12, 13 connected to both ends of the circular part 11, and a straight part 14 extending between the straight parts 12, 13.
• the straight part 14 extends perpendicular to the straight parts 12, 13.
• the circular part 11 and the straight parts 12, 13, 14 are each provided on its outside with an inclined surface 15. Seen in a plane extending radially with respect to the central axis 9, the inclined surface 15 includes an obtuse angle A (see figure 5B) with a plane extending perpendicular to the central axis 9.
• the obtuse angle A is for example in a range between 95 and 140 degrees.
• the inclined surfaces 15 are directed towards the second coupling element 6.
• Figure 3B shows a schematic top view of the first coupling element 5, with the straight part 14 provided with the inclined surface 15.
• a first inclined surface 15A of the inclined surface 15 is located on a left side whilst a second inclined surface 15B of the inclined surface 15 is located on a right side of a plane V extending radially with respect to the central axis 9 and perpendicularly to the straight part 14.
• a tangential direction T extends perpendicularly to a radial direction between the central axis 9 and the location L.
• the first inclined surface 15A includes an obtuse angle with the tangential direction T. Since the inclined surface 15 includes an obtuse angle A with a plane extending perpendicularly to the central axis 9 as well as with a radial direction R extending radially to the central axis 9, the obtuse angle of the first inclined surface 15A with the tangential direction T will be different at different locations L on the first inclined surface 15 A.
• the second inclined surface 15B includes an obtuse angle with the tangential direction T, which will be different at different locations L on the second inclined surface 15B.
• the obtuse angle between the first inclined surface 15A and the tangential direction T is located on a side of the inclined surface 15 directed towards the central axis 9
• the obtuse angle between the second inclined surface 15B and the tangential direction T is located on a side of the inclined surface 15 directed away from the central axis 9.
• the first and second inclined surfaces 15 A, 15B are inclined in opposite directions relative to said tangential direction T.
• the tubular part 8 is provided on its outside with two grooves 16 extending parallel to each other and perpendicular to the central axis 9.
• One of the grooves 16 extends parallel to the straight part 14.
• Each groove 16 comprises sloped surfaces 17, 18.
• An end 19 of the tubular part 8 near the grooves 16 is bevelled.
• the second coupling element 6 comprises a tubular part 20 extending along the central axis 9.
• the internal diameter of the tubular part 20 of the second coupling element 6 is slightly larger than the external diameter of the tubular part of the first coupling element 5.
• the tubular part 20 is provided with a ring-shaped flange 21.
• the ring-shaped flange 21 has a circular part 22 extending over 180 degrees along the central axis 9, straight parts 23, 24 connected to both ends of the circular part 22, and a straight part 25 extending between the straight parts 23, 24.
• the straight part 25 extends perpendicular to the straight parts 23, 24.
• the circular part 22 and the straight parts 23, 24, 25 are each provided on its inside with an inclined surface 26.
• the inclined surface 26 Seen in a plane extending radially with respect to the central axis 9, the inclined surface 26 includes an obtuse angle A (see figure 5B) with a plane extending perpendicularly to the central axis 9. The inclined surfaces 26 are directed towards the first coupling element 5.
• the tubular part 20 is provided with two slits 27 extending parallel to each other and perpendicular to the central axis 9.
• One of the slits 27 extends parallel to the straight part 25.
• the tubular part 20 is provided with a notch 28 and a recess 29 located between the notch 28 and the straight part 24.
• a spring element 7 is connected to the second coupling element 6.
• the spring element 7 is U-shaped and comprises two leg portions 30 extending parallel to each other and a bridge portion 31 extending between the two leg portions 30.
• the leg portions 30 and bridge portion 31 extend perpendicular to the central axis 9.
• the leg portions 30 are located in the slits 27 of the tubular part 20 and extend partially through the slits 27 into a cylindrical- shaped space 32 bounded by the tubular part 20.
• the bridge portion 31 of the spring element 7 is located in the recess 29 between the notch 28 and the straight part 24.
• the first coupling element 5 and the second coupling element 6 are configured to arrive from an uncoupled state into a coupled state relative to each other by driving the first and second coupling elements 5, 6 towards each other in the axial direction along the central axis 9, and to arrive from the coupled state into the uncoupled state by driving the first and second coupling elements 5, 6 away from each other in the axial direction along the central axis 9.
• a user wants to couple the first coupling element 5 of the head structure 3 to the second coupling element 6 of the base structure 2, he will place the first coupling element 5 above the second coupling element 6 and roughly align the central axis 9 of the first coupling element 5 with the central axis 9 of the second coupling element 6 (see figure 4A). He will than move the first coupling element 5 in a direction indicated by arrow PI towards the second coupling element 6, whereby the tubular part 8 is inserted into the cylindrical space 32 bounded by the tubular part 20. The bevelled end 19 facilitates placing by seeking the location of the cylindrical shaped space 32. He will continue until the collar 10 abuts against the flange 21 (see figure 4B).
• the user will rotate the first coupling element 5 in a direction indicated by double arrow P2 along the central axis 9 with respect to the second coupling element 6 (see figure 4C). He will continue to rotate the first coupling element 5 until he sees and feels that the circular parts 11, 22, the straight parts 12, 23; 13, 24; 14, 25 are aligned (see figure 4D) and the inclined surfaces 15, 26 thereof can be moved further towards each other in the direction indicated by arrow PI until the inclined surfaces 15, 26 are in abutment. During the movement in the direction indicated by arrow PI, the bevelled end 19 of the first coupling element 5 will force the leg portions 30 of the spring element 7 apart.
• the leg portions 30 of the spring element 7 will snap into the grooves 16 of the tubular part 8 as soon as the tubular part 8 as moved far enough into the tubular part 20.
• the spring element 7 retains the first and second coupling elements 5, 6 in the coupled position. This coupled position is shown in figures 5A and 5B.
• leg portions 30 of the spring element 7 will slide along the sloped surface 18 of the groove 16 and will be moved out of the groove 16 and the first coupling element 5 can easily be moved out of engagement with the second coupling element 6.
• the first coupling element 5 will be driven by the cooperating inclined surfaces 15, 26 in the direction indicated by arrow P4, until the coupling elements 5, 6 are in the position as shown in figure 4C, in which the coupling elements 5, 6 are freely rotatable with respect to each other. Due to the uncoupling of the coupling elements 5, 6 under influence of the torque, no damage will occur on the head structure 3 and the base structure 2. To prevent damage of the coupling elements 5, 6 as a result of said torque, an inclination of the inclined surface 15, i.e.
• the obtuse angle A is selected such that the first coupling element 5 and the second coupling element 6 arrive from the coupled state into the uncoupled state by rotating the coupled coupling elements 5, 6 with respect to each other about the central axis over an angle smaller than 90°, preferably smaller than 45°, and more preferably smaller than 3 0°.
• first and second coupling elements 5, 6 comprising the spring element 7 and the slits 27 as described here before
• other types of coupling elements may be used which are configured to arrive from an uncoupled state into a coupled state relative to each other by driving the coupling elements towards each other in the axial direction along the central axis, and to arrive from the coupled state into the uncoupled state by driving the coupling elements away from each other in the axial direction along the central axis.
• Examples of such alternative coupling elements are snap connections and snap couplings which are well known to the skilled person.
• Figures 6-8 show several views of a second embodiment of two cooperating coupling elements 35, 36 of the shaving device 1 according to the invention.
• the first coupling element 35 comprises a tubular part 38 extending along a central axis 9.
• the tubular part 38 is provided with a collar 40.
• the collar 40 comprises a first circular part 41 extending over about 180 degrees along the central axis 9 and a second circular part 42 extending over about 60 degrees along the central axis 9.
• the first and second circular parts 41, 42 are separated by open spaces 43 extending over about 60 degrees along the central axis 9.
• the first and second circular parts 41, 42 are provided with an inclined surface 45, 46.
• the inclined surface 45, 46 includes an obtuse angle B (see figure 6) with a top side 47 of the collar 40.
• the top side 47 extends perpendicular to the central axis 9. Furthermore, the inclined surface 45, 46 includes the obtuse angle B with a tangential direction T extending tangential to the central axis 9 and from the respective inclined surface 45, 46.
• the obtuse angle B is for example in a range between 95 and d 140 degrees.
• the inclined surface 45, 46 are inclined in opposite directions. The inclined surfaces 45, 46 are directed towards the second coupling element 36.
• the tubular part 38 is provided on its outside with two grooves 16 extending parallel to each other and perpendicular to the central axis 9.
• Each groove 16 comprises sloped surfaces 17, 18.
• An end 19 of the tubular part 38 near the grooves 16 is bevelled.
• the second coupling element 36 comprises a tubular part 50 extending along the central axis 9.
• the internal diameter of the tubular part 50 of the second coupling element 36 is slightly larger than the external diameter of the tubular part 38 of the first coupling element 35.
• the tubular part 50 is provided with a first flange 51 and a second flange 52, each extending over about 60 degrees along the central axis 9.
• the first and second flanges 51, 52 are separated by open spaces 53, 54.
• the open space 53 extends over about 60 degrees along the central axis 9, whilst the open space 54 extends over about 180 degrees along the central axis 9.
• the inclined surface 55, 56 includes an obtuse angle B (see figure 6) with a plane perpendicular to the central axis 9. Furthermore, the inclined surface 55, 56 includes the obtuse angle B with a tangential direction T extending tangential to the central axis 9 and from the respective inclined surface 55, 56. The inclined surface 55, 56 are inclined in opposite directions. The inclined surfaces 45, 46 are directed towards the first coupling element 35.
• first and second circular parts 41, 42 and the spaces 43 of the first coupling element 35 and the first and second flanges 51, 52 of the second coupling element 36 are such that they match with each other as can be seen in the figures 7B and 8.
• the coupling and uncoupling of the coupling elements 35, 36 will now be explained with reference to the figures 7 A and 7B.
• the first coupling element 35 and the second coupling element 36 are configured to arrive from an uncoupled state into a coupled state relative to each other by driving the first and second coupling elements 35, 36 towards each other in the axial direction along the central axis 9, and to arrive from the coupled state into the uncoupled state by driving the first and second coupling elements 5, 6 away from each other in the axial direction along the central axis 9.
• a user wants to couple the first coupling element 35 of the head structure 3 to the second coupling element 36 of the base structure 2, he will place the first coupling element 35 above the second coupling element 36 and will roughly align the central axis 9 of the first coupling element 35 with the central axis 9 of the second coupling element 36 (see figure 7A). He will than move the first coupling element 35 in a direction indicated by arrow PI towards the second coupling element 36 whereby the tubular part 38 is inserted into the tubular part 50. He will continue until the collar 40 abuts against the flanges 51, 52. The user will then rotate the first coupling element 35 in a direction indicated by double arrow P2 along the central axis 9 with respect to the second coupling element 36.
• leg portions 30 of the spring element 7 will slide along the sloped surface 18 of the groove 16 and will be moved out of the groove 16 and the first coupling element 35 can easily be moved out of engagement with the second coupling element 36.
• the inclined surfaces 45 of the part 41, 42 will be forced in a direction indicated by arrow P3 against the co-operating inclined surface 55 of the flanges 51, 52. Due to this force, the inclined surfaces 45 will be moved in a direction indicated by arrow P4, extending parallel to the central axis 9 and away from the second coupling element 36. During this movement, the spring element 7 will be disengaged from the grooves 16 in the same manner as described above.
• the first coupling element 35 will be driven by the cooperating inclined surfaces 45; 55 in the direction indicated by arrow P4, until the coupling elements 35, 36 are in the position in which the coupling elements 35, 36 are freely rotatable with respect to each other.
• an inclination of the inclined surfaces 45, 46 i.e. the obtuse angle B, is selected such that the first coupling element 35 and the second coupling element 36 arrive from the coupled state into the uncoupled state by rotating the coupled coupling elements 35, 36 with respect to each other about the central axis 9 over an angle smaller than 15°, and more preferably smaller than 10°.
• the obtuse angle between the first inclined surface with the tangential direction T might be the same or different from the obtuse angle between the second inclined surface with the tangential direction T.
• a user wants to uncouple the coupling elements, he may apply a pulling force in axial direction at one coupling element to disengage the spring 7 from the groove 27 or he may apply a relatively large torque about the central axis 9. He can also apply such a pulling force as well as such a torque.
• the first and second coupling elements 5, 6; 35, 36 can be connected to each other in only one specific orientation with respect to each other. For a user this specific orientation is clearly visible and the user will get tactile feedback when connecting the coupling elements to each other.
• the flanges and circular parts form protrusions, which fit in recesses formed by the spaces between the flanges and the circular parts, wherein the coupling elements can only be coupled to each other if each protrusion is located in the correct recess.
• the coupling elements can be coupled to each other in two or more different orientations with respect to each other, wherein in each orientation the coupling elements are correctly coupled to each other.
• the coupling elements for coupling parts of a personal care device of another type than the shaving device described here before, for example a trimmer, brush or shaving head, or for coupling parts in such kind of personal care devices like grooming devices.

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• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Dry Shavers And Clippers (AREA)

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• 2014
  • 2014-05-21 US US14/892,633 patent/US10946538B2/en active Active
  • 2014-05-21 CN CN201480030752.0A patent/CN105263680B/zh active Active
  • 2014-05-21 BR BR112015029465-0A patent/BR112015029465B1/pt not_active IP Right Cessation
  • 2014-05-21 EP EP14727756.0A patent/EP3003653B1/en active Active
  • 2014-05-21 RU RU2015155843A patent/RU2674051C2/ru active
  • 2014-05-21 WO PCT/EP2014/060388 patent/WO2014191265A1/en not_active Ceased
  • 2014-05-21 JP JP2016515727A patent/JP6400684B2/ja active Active

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