Connection system for safety razors

Patent metadata

Field	Value
Publication number	US-2021339417-A1
Application number	US-201817274482-A
Country	US
Kind code	A1
Filing date	Sep 10, 2018
Priority date	Sep 10, 2018
Publication date	Nov 4, 2021
Grant date	—

Abstract

A connection system for connecting a safety razor handle (50) to a replaceable blade cartridge (10), comprising: a cartridge connecting structure (120) attached to the replaceable blade cartridge (10); and a handle connecting structure (102) attached to the safety razor handle (50) and configured to be brought into engagement with the cartridge connecting structure (120) along a connection axis, wherein the handle connecting structure (102) comprises a lever (112) mounted to a body (103), the lever (112) having a user end (113) to be actuated by a user, a working end (114), and a rotation axis (115) about which the lever (112) is rotatable with respect to the body (103), the rotation axis (115) being situated between the user end (113) and the working end (114), and the working end (114) of the lever (112) is configured to exert a pushing force on the cartridge connecting structure (120) when the lever (112) is rotated by actuation of the user end (113), to eject the cartridge connecting structure (120) from the handle connecting structure (102).

First claim

1 .- 20 . (canceled)

21 . A connection system for connecting a safety razor handle to a replaceable blade cartridge, wherein the system comprises:
a cartridge connecting structure attached to the replaceable blade cartridge; and a handle connecting structure attached to the safety razor handle and configured to be brought into engagement with the cartridge connecting structure along a connection axis, and wherein the handle connecting structure comprises a lever mounted to a body, the lever having a user end to be actuated by a user, a working end, and a rotation axis about which the lever is rotatable with respect to the body, the rotation axis being situated between the user end and the working end, and the working end of the lever is configured to exert a pushing force on the cartridge connecting structure when the lever is rotated by actuation of the user end, to eject the cartridge connecting structure from the handle connecting structure.

22 . The connection system of claim 21 , wherein the pushing force on the cartridge connecting structure releases complementary securing elements of the handle and cartridge connecting structures.

23 . The connection system of claim 21 , wherein an inner surface of the cartridge connecting structure comprises a protrusion against which the working end of the lever urges when the lever is rotated by actuation of the user end.

24 . The connection system of claim 21 , wherein the pushing force deforms a wall of the cartridge connecting structure.

25 . The connection system of claim 21 , wherein the lever is mounted to the body so that the user end is to be actuated in a direction toward the handle.

26 . The connection system of claim 21 , wherein the working end of the lever has a chamfered surface.

27 . The connection system of claim 21 , wherein the working end of the lever comprises a pair of arms, each arm having a contact portion with a contact surface, and each arm being joined to the user end of the lever at the rotation axis.

28 . The connection system of claim 27 , wherein each arm further has a bearing portion with a bearing surface, and the user end has bearing portions which are respectively joined to the bearing portions of the working end at the rotation axis, the bearing portions of the user end having bearing surfaces which face in a direction opposite to the bearing surfaces of the working end.

29 . The connection system of claim 21 , wherein bearing portions of the user end and bearing portions of the working end are sandwiched between a housing and a cover of the body, the bearing surfaces of the user end being configured to bear against an inner surface of the housing, and the bearing surfaces of the working end being configured to bear against an inner surface of the cover.

30 . The connection system of claim 21 , wherein the working end of the lever is configured to contact the cartridge connecting structure when the cartridge connecting structure is brought into engagement with the handle connecting structure, to rotate the lever into a position ready for actuation by a user.

31 . The connection system of claim 21 , wherein the lever comprises one or more protrusions configured to generate friction against the body of the handle connecting structure.

32 . The connection system of claim 21 , wherein the cartridge connecting structure comprises a pair of legs extending outwardly from a body and forming a pivoting connection to a blade unit of the replaceable blade cartridge, the body of the cartridge connecting structure comprising a pair of holes adjacent to the pair of legs and configured to receive a pair of protrusions extending from the body of the handle connecting structure.

33 . The connection system of claim 21 , wherein the user end has a chamfered surface.

34 . A handle connecting structure for a safety razor handle, wherein the structure comprises:
a body configured to be attached to the safety razor handle; and a lever mounted to the body, the lever having a user end to be actuated by a user, a working end, and a rotation axis about which the lever is rotatable with respect to the body, the rotation axis being situated between the user end and the working end, and wherein when the handle connecting structure is engaged with a cartridge connecting structure of a replaceable blade cartridge and the lever is rotated by actuation of the user end, the working end of the lever is configured to exert a pushing force on the cartridge connecting structure to eject the cartridge connecting structure from the handle connecting structure.

35 . A safety razor handle, wherein the handle comprises:
a handle body; and the handle connecting structure of claim 34 .

36 . The safety razor handle of claim 35 , wherein the handle body comprises:
an underneath surface portion facing a skin of a user in use and comprising an attachment element for attachment to a blade unit; a front surface portion facing in a direction opposite from a shaving direction in use; a rear surface portion facing in the shaving direction in use; a top surface portion and side surface portions, one directed to either side of a blade length in use; the top surface portion, underneath the surface portion and side surface portions together forming a continuous smooth surface which is a substantially cylindrical or substantially ellipsoid or substantially partially spherical surface; and a distance between the front surface portion and a rear surface portion being between one third and three times the largest dimension of a largest cross section through a continuous smooth surface.

37 . The safety razor handle of claim 35 , wherein the handle body is bulbous in two orthogonal directions, widening away from an end surface towards a center of the body.

38 . A replaceable blade cartridge, wherein the cartridge comprises:
a blade unit housing a plurality of shaving blades; a frame secured to the blade unit, the frame having a guard in front of the blades and a cap to the rear of the blades; and a cartridge connecting structure comprising a pair of legs extending outwardly from a body and forming a pivoting connection to the blade unit.

39 . A safety razor system, wherein the system comprises:
a safety razor handle; a replaceable razor cartridge; and the connection system for connecting the safety razor handle to the replaceable blade cartridge of claim 21 .

40 . The safety razor system of claim 39 , wherein the handle body comprises a substantially flat end surface and a side surface, the handle connecting structure is attached to the side surface, and when the flat end surface is in contact with a horizontal plane, the safety razor is in a stable position of rest, the flat end surface forming the safety razor's only region of contact with the horizontal plane and elevating the cartridge above the horizontal plane.

Assignees

• Beiersdorf Ag

Inventors

• Maurer Peter
• Kruemke Alexander
• Kohut Michaela
• Schultchen Arne
• Feldmann Andre
• Jung Christine
• Warnecke Armin
• Steur Jelte
• Veendijk Arif
• Patje Sander
• De Vrind Johannes Rogier

Classifications

• B26B21/521 Primary

  Connection details, e.g. connection to razor heads · CPC title

• B26B21/227

  with blades being resiliently mounted in the changeable unit · CPC title

• B26B21/522

  Ergonomic details, e.g. shape, ribs or rubber parts · CPC title

• B26B21/225

  the changeable unit being resiliently mounted on the handle · CPC title

• B26B21/4025

  Cap elements · CPC title