Shaving razor including a biasing member producing a progressively increasing cartridge return torque and handle geometry enhancing control during shaving

摘要

A shaving razor that improves stability, corresponding user control and offers a closer shave is provided. The shaving razor can include a razor handle configuration that reduces the propensity for the shaving razor to roll in a users hand and improves the maneuverability of the razor cartridge during shaving. In addition, the shaving razor can include a biasing pivoting member producing a progressively increasing return torque on the razor cartridge that forces the cartridge into flat contact with the skin thus improving glide and shaving closeness.

主权项

1. A shaving razor including a biasing member producing a progressively increasing cartridge return torque and a handle geometry providing enhanced control during shaving, the shaving razor comprising:
a. a cartridge comprising:
1) a cartridge housing having a front edge portion, a rear edge portion and two opposing side edge portions extending from the front edge portion to the rear edge portion;2) at least one shaving blade disposed between the front edge portion and the rear edge portion;3) a cutting plane tangent to the rear edge portion and the front edge portion of the cartridge housing with a forward cutting direction toward the front edge portion of the cartridge;4) a point of equilibrium intersecting the cutting plane and balancing the forward portion and the rear portion of the cartridge;5) a cartridge pivot axis providing an axis of rotation for the cartridge; and6) a connecting member;and b. a handle comprising:
1) a forward portion comprising a cartridge connecting structure that connects to the connecting member of the cartridge; the handle connecting structure, includes a biasing member that contacts and exerts a progressively increasing return torque on the cartridge as the cartridge rotates about the pivot axis during use, wherein the progressively increasing return torque increases from zero when the cartridge is in a neutral position to a peak torque of about 14 Nmm when the cartridge is in a fully rotated position, wherein the progressively increasing torque increases at a gradient that is less than 0.3 Nmm/degree;2) a rear portion opposite the forward portion comprising a free end; and3) an elongate central portion disposed between the forward portion and the rear portion, the elongate central portion having an upper surface and a lower surface and a longitudinal axis disposed therebetween, wherein a projection of the longitudinal axis intersects the cutting plane at a point of intersection, wherein the point of intersection leads the point of equilibrium in the cutting direction by a distance of less than 10 mm.