Electric shaver
An electric shaver includes: a main body; an outer blade provided to an end of the main body and having a blade hole defined by a bar; and an inner blade provided inward of the outer blade and configured to reciprocate in a longitudinal direction of the outer blade to cut hair in the blade hole with the outer blade. The bar has a hair raising portion coming in contact with hair upon movement of the outer blade on a skin surface to raise hair up from the skin surface. A contact pressure on the skin surface to be exerted by the outer blade in a first portion of the outer blade is greater than that in a second portion of the outer blade. Hair raising performance in raising hair up from the skin surface in the first portion is smaller than hair raising performance in the second portion.
1. An electric shaver comprising:
a main body to be gripped by a user;
an outer blade provided to an end portion of the main body, the outer blade comprising longitudinal bars extending in a longitudinal direction of the outer blade and lateral bars extending in a lateral direction intersecting with the longitudinal direction, wherein the longitudinal bars and the lateral bars intersect to define blade holes; and
an inner blade provided inward of the outer blade and configured to reciprocate in a longitudinal direction of the outer blade to cut hair let in the blade holes in cooperation with the outer blade, wherein
the longitudinal bars are located in first and second portions of the outer blade and have hair raising portions configured to come in contact with hair upon movement of the outer blade on a skin surface to raise hair up from the skin surface,
the outer blade has a curved shape in a side view,
the first portion is a top portion of the curved shape,
the second portion is an outer portion situated at either outer side, in the lateral direction, of the top portion of the curved shape,
a contact pressure on the skin surface to be exerted by the outer blade in the first portion is greater than a contact pressure in the second portion,
a cross-section of the longitudinal bars in the first portion have a different shape than a cross-section of at least one of the longitudinal bars in the second portion,
hair raising performance in raising hair up from the skin surface by the longitudinal bars in the first portion is smaller than hair raising performance by the longitudinal bars in the second portion,
the hair raising portions are formed into a tapered shape at an end, in the lateral direction, of the longitudinal bars, and
a curvature radius of the end, in the lateral direction, of the longitudinal bars in the first portion is larger than a curvature radius of the end, in the lateral direction, of the longitudinal bars in the second portion.
2. The electric shaver according to claim 1 , wherein
the curved shape is a reverse U-shape in the side view, and
the hair raising portions include first and second hair raising portions formed at both ends, in the lateral direction, of the longitudinal bars.
3. The electric shaver according to claim 1 , wherein
each of the longitudinal bars have a top surface offset from a corresponding top surface of the lateral bars toward the main body,
a distance between the corresponding top surface of the lateral bars and a corresponding top surface of an end, in the lateral direction, of the longitudinal bars in the first portion is larger than a distance between the corresponding top surface of the lateral bars and a corresponding top surface of an end, in the lateral direction, of the longitudinal bars in the second portion.
4. The electric shaver according to claim 1 , wherein
the hair raising portions have a bent portion formed by causing an end, in the lateral direction, of the longitudinal bars in the second portion to be spaced away from the main body farther than is a center portion, in the lateral direction, of the longitudinal bars in the second portion,
the longitudinal bars in the second portion as a whole has a U-shape cross section,
a top surface of the bent portion forms a clearance angle with respect to the lateral direction, and
a first clearance angle in the first portion is smaller than a second clearance angle in the second portion.
5. The electric shaver according to claim 4 , wherein the longitudinal bars in the second portion have:
a longitudinal end portion having a linear shape in cross section;
a longitudinal center portion where the bent portion is formed; and
a boundary portion gently curved to connect the longitudinal end portion to the longitudinal center portion.
6. The electric shaver according to claim 4 , wherein the first clearance angle is 0°.
7. The electric shaver according to claim 1 , wherein an opening angle of the tapered end, in the lateral direction, of the longitudinal bars in the first portion is larger than an opening angle of the tapered end, in the lateral direction, of the longitudinal bars in the second portion.
8. The electric shaver according to claim 1 , wherein the longitudinal bars are provided in adjacent rows that extend in the lateral direction, and wherein the longitudinal bars in one of the adjacent rows are offset in a lateral direction from the longitudinal bars in another of the adjacent rows.
9. The electric shaver according to claim 1 , wherein the lateral bars have undulations extending in the lateral direction.