Comb-shaped outer blade, blade unit, and electric razor

Patent metadata

Field	Value
Publication number	US-11745366-B2
Application number	US-202217576314-A
Country	US
Kind code	B2
Filing date	Jan 14, 2022
Priority date	Mar 30, 2021
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A comb-shaped outer blade that scoops up body hair while suppressing the damage to the skin. The comb-shaped outer blade includes a base part that has a rod shape and extends in a first direction, a comb-blade attachment part that has a plate shape and extends in the first direction and a second direction, open blade parts each of which has a cantilever shape and protrudes from base part in a third direction, and bent blade parts arranged alternately with the open blade parts in the first direction, the bent blade parts connecting the base part to the attachment part. Each of the bent blade parts includes a protruding part that protrudes from the base part along the third direction, bent part that is connected to a distal end of the protruding part, and connecting part that connects bent part and comb-blade attachment part in an inclined state.

First claim

What is claimed is:

1. A comb-shaped outer blade configured to be attached to an electric razor, the comb-shaped outer blade comprising:
a base part that has a rod shape and extends in a first direction;
an attachment part that has a plate shape and extends in the first direction and a second direction intersecting the first direction;
open blade parts each of which has a cantilever shape and protrudes from the base part in a third direction which intersects the first direction and the second direction; and
bent blade parts arranged alternately with the open blade parts in the first direction, the bent blade parts connecting the base part to the attachment part, wherein:
each of the bent blade parts comprises:
a protruding part that protrudes from the base part along the third direction;
a connecting part attached to the attachment part; and
a bent part connecting the protruding part and the connecting part, and bent at an acute angle,

the connecting part extends from the bent part to the attachment part so as to approach the base part in the third direction as leaving away from the bent part,
each of the open blade parts comprises:
a first upper surface part that extends in the first direction and the third direction; and
a first inclined surface part that has a flat upper surface and extends from a distal end of the upper surface part in the third direction and the flat upper surface inclines so as to approaches the attachment part in the second direction as leaving away from the base part, and

a thickness of the first inclined surface part decreases as leaving away from the first upper surface part.

2. The comb-shaped outer blade according to claim 1 , wherein an end surface of the bent part is disposed at a position farther from the base part than a distal end surface of each of the open blade parts in the third direction.

3. The comb-shaped outer blade according to claim 1 , wherein each of the bent blade parts comprises a second inclined surface that is disposed substantially in a same plane as the first inclined surface part.

4. The comb-shaped outer blade according to claim 1 , wherein
each of the open blade parts comprises:
a first side surface part that extends in the second direction and the third direction, and
a first corner portion of the first upper surface part and the first side surface part are rounded.

5. The comb-shaped outer blade according to claim 1 , wherein
each of the bent blade parts comprises:
a second upper surface part that extends in the first direction and the third direction, and
a second side surface part that extends in the second direction and the third direction, and
a second corner portion of the second upper surface part and the second side surface part are rounded.

6. The comb-shaped outer blade according to claim 1 , wherein each of the open blade parts and each of the bent blade parts are arranged alternately.

7. The comb-shaped outer blade according to claim 1 , wherein
the base part includes a central portion that is curved so as to protrude from both end portions of the base part in a plane extending in the first direction and the second direction, and
the open blade parts and the bent blade parts are arranged along a curve of the base part.

8. A blade unit for an electric razor, the blade unit is configured to be detachably attached to the electric razor, the blade unit comprising:
the comb-shaped outer blade according to claim 1 ;
a slit inner blade that is disposed inside the comb-shaped outer blade; and
a comb-blade holding member that holds the slit inner blade so as to be able to reciprocate with respect to the comb-shaped outer blade.

9. An electric razor comprising the comb-shaped outer blade according to claim 1 .

10. The comb-shaped outer blade according to claim 1 , wherein
a width of the connecting part in the first direction increases as leaving away from the bent part.

11. The comb-shaped outer blade according to claim 1 , wherein
a portion of the base part between one of the open blade parts and adjacent one of the bent blade part is rounded.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Okura Shoki
• Omori Masato
• Shimizu Hiroaki
• Komori Shunsuke
• Ikemoto Atsutaka
• Sone Daisuke

Classifications

• B26B19/04 Primary

  Cutting heads therefor; Cutters therefor; Securing equipment thereof · CPC title

• B26B19/28 Primary

  Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive (electric motors per se H02) · CPC title

• B26B19/10 Primary

  involving two or more different types of reciprocating cutting elements, e.g. a pair of toothed shearing elements combined with a pair of perforated cutting elements or a combined toothed and perforated cutting assembly · CPC title

• B26B19/3806

  Accessories · CPC title

• B26B19/3846

  Blades; Cutters (B26B19/044, B26B19/141 take precedence) · CPC title