Blade support for multi-blade razor cartridges
View Patent ↗The invention provides a razor cartridge with multiple blades and peg(s) or pegged support members that aid in the control of the blades by restricting fore and aft blade movement, which in turn, reduces the amplitude of blade deflection and/or vibration during shaving. This reduction provided by the pegs improves shaving performance. Blades rest between pegs which are rounded or shaped such that the blade bottom portion contacts the peg at one point, forming a single line of contact. The pegs may be in a slalom-like, linear (with one or more peg columns), or offset arrangement. Pegs or pegged support members may be at any location of the razor blade assembly; for instance, at the center and/or at blade slot ends. Pegs may each be of different shapes and may or may not be equidistant or at the same heights as each other, depending on blade spans and exposures.
1. A razor blade unit comprising:
a housing;
a guard arranged at a front portion of the housing;
a cap arranged at a rear portion of the housing;
at least one blade comprising a sharp top edge and a bottom portion having front and back sides and being arranged essentially in parallel between the guard and the cap, wherein the at least one blade optionally comprises a blade carrier; and
a plurality of pegs wherein one of said plurality of pegs contacts and supports the front side of said bottom portion of the at least one blade or the blade comprising said blade carrier, and an adjacent peg contacts and supports the back side of said bottom portion of the at least one blade or of the blade comprising said blade carrier, wherein an intersection between each peg and the blade or the blade comprising said blade carrier forms a single line of contact.
2. The razor blade unit of claim 1 wherein each of said plurality of pegs can be of any shape wherein said shape provides a single line of contact with at least one respective blade of said plurality of blades.
3. The razor blade unit of claim 1 wherein each of said plurality of pegs is round or cylindrically shaped.
4. The razor blade unit of claim 1 , wherein each peg has a width that is greater than a thickness of the blade.
5. The razor blade unit of claim 1 , wherein each peg has a width of from about 0.1 to about 0.3 mm, a breadth of from about 2.0 to about 5.0 mm, and a depth of from about 1.5 to about 3.0 mm.
6. The razor blade unit of claim 1 , wherein said plurality of pegs comprises an elastomeric material, a plastic or a metal.
7. The razor blade unit of claim 1 , wherein the at least one of the pair of support members is located centrally in the housing.
8. The razor blade unit of claim 1 wherein said at least one of the pair of support members is located at a blade slot end.