Guard element for use in a hair cutting unit

Patent metadata

Field	Value
Publication number	US-10456937-B2
Application number	US-201515531482-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Dec 9, 2014
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A guard element ( 4 ) for use in a hair cutting unit as a guard of a movable hair cutting element of the hair cutting unit has a disc-shaped base ( 10 ) and an annular wall ( 20 ) comprising a main part ( 21 ) extending from the periphery of the base ( 10 ), and a flange-shaped part ( 22 ) comprising an outwardly bent section ( 24 ). The annular wall ( 20 ) is reinforced on the basis of at least one of a design where a smallest inner periphery of the flange-shaped part ( 22 ) has a diameter which is smaller than a diameter of a largest inner periphery of a straight section ( 23 ) of the main part ( 21 ) connected to the periphery of the base ( 10 ), and a design where a free end section ( 25 ) of the flange-shaped part ( 22 ) is at least partially bent. In an embodiment, at least a portion of the main wall part ( 21 ) of the guard element ( 4 ) tapers inwardly in a direction along a central axis ( 11 ) of the disc-shaped base ( 10 ), from the disc-shaped base ( 10 ) to the flange-shaped wall part ( 22 ), such that the flange-shaped wall part ( 22 ) is enlarged with respect to a flange-shaped wall part ( 22 ) of a guard element ( 5 ) not having the tapered shape of the main wall part ( 21 ), resulting in increased stiffness and an increased resonant frequency of the guard element ( 4 ).

First claim

The invention claimed is:

1. A guard element for use in a hair cutting unit as a guard for a movable hair cutting element of the hair cutting unit, which guard element is generally cup-shaped and comprises a disc-shaped base and an annular wall, wherein
the disc-shaped base comprises a central axis and a peripheral section which is curved when seen in a central cross-section of the guard element comprising the central axis; and
the annular wall comprises a main part and a flange-shaped part; and wherein
the main part of the annular wall has a substantially upright orientation with respect to the disc-shaped base and comprises a straight section, which is uncurved when seen in the central cross-section and which is connected to the peripheral section of the disc-shaped base, and the main part of the annular wall is partially bent when seen in the central cross-section; and
the flange-shaped part of the annular wall comprises an outwardly bent section, which is bent outwardly relative to the central axis when seen in the central cross-section, and a free end section;
wherein the outwardly bent section of the flange-shaped part of the annular wall interconnects the main part of the annular wall and the free end section of the flange-shaped part of the annular wall; and
wherein the annular wall is reinforced based on a design where a smallest inner periphery of the flange-shaped part of the annular wall has a diameter which is smaller than a diameter of a largest inner periphery of the straight section of the main part of the annular wall.

2. The guard element according to claim 1 , wherein the main part of the annular wall has an inward annular bulge at a transition to the outwardly bent section of the flange-shaped part of the annular wall.

3. A hair cutting unit, comprising a guard element according to claim 1 and a movable hair cutting element rotatably arranged in an inner space of the guard element which is surrounded by the main part of the annular wall.

4. A hair cutting appliance, comprising a main body for a user of the hair cutting appliance to take hold of and a head including at least one hair cutting unit according to claim 3 .

5. A guard element for use in a hair cutting unit as a guard for a movable hair cutting element of the hair cutting unit, which guard element is generally cup-shaped and comprises a disc-shaped base and an annular wall, wherein
the disc-shaped base comprises a central axis and a peripheral section which is curved when seen in a central cross-section of the guard element comprising the central axis; and
the annular wall comprises a main part and a flange-shaped part; and wherein
the main part of the annular wall has a substantially upright orientation with respect to the disc-shaped base and comprises a straight section, which is uncurved when seen in the central cross-section and which is connected to the peripheral section of the disc-shaped base; and
the flange-shaped part of the annular wall comprises an outwardly bent section, which is bent outwardly relative to the central axis when seen in the central cross-section, and a free end section;
wherein the outwardly bent section of the flange-shaped part of the annular wall interconnects the main part of the annular wall and the free end section of the flange-shaped part of the annular wall; and
wherein the annular wall is reinforced based on at least one of a design where a smallest inner periphery of the flange-shaped part of the annular wall has a diameter which is smaller than a diameter of a largest inner periphery of the straight section of the main part of the annular wall, and a design where the free end section of the flange-shaped part of the annular wall is bent inwardly towards the central axis.

6. The guard element according to claim 5 , wherein at least a portion of the main part of the annular wall tapers inwardly in a direction along the central axis from the disc-shaped base to the flange-shaped part of the annular wall.

7. The guard element according to claim 5 , wherein the main part of the annular wall is partially bent when seen in the central cross-section.

8. The guard element according to claim 7 , wherein the main part of the annular wall has an inward annular bulge at a transition to the outwardly bent section of the flange-shaped part of the annular wall.

9. A hair cutting unit, comprising a guard element according to claim 5 ; and a movable hair cutting element rotatably arranged in an inner space of the guard element, which is surrounded by the main part of the annular wall.

10. A hair cutting appliance, comprising: a main body for a user of the hair cutting appliance to take hold of; and a head including at least one hair cutting unit according to claim 9 .

11. A guard element for use in a hair cutting unit as a guard for a movable hair cutting element of the hair cutting unit, which guard element is generally cup-shaped and comprises a disc-shaped base and an annular wall, wherein
the disc-shaped base comprises a central axis and a peripheral section which is curved when seen in a central cross-section of the guard element comprising the central axis; and
the annular wall comprises a main part and a flange-shaped part; and wherein
the main part of the annular wall has a substantially upright orientation with respect to the disc-shaped base and comprises a straight section, which is uncurved when seen in the central cross-section and which is connected to the peripheral section of the disc-shaped base, and at least a portion of the main part of the annular wall tapers inwardly in a direction along the central axis from the disc-shaped base to the flange-shaped part of the annular wall; and
the flange-shaped part of the annular wall comprises an outwardly bent section, which is bent outwardly relative to the central axis when seen in the central cross-section, and a free end section;
wherein the outwardly bent section of the flange-shaped part of the annular wall interconnects the main part of the annular wall and the free end section of the flange-shaped part of the annular wall; and
wherein the annular wall is reinforced on based on a design where a smallest inner periphery of the flange-shaped part of the annular wall has a diameter which is smaller than a diameter of a largest inner periphery of the straight section of the main part of the annular wall.

12. A hair cutting unit, comprising a guard element according to claim 11 , and a movable hair cutting element rotatably arranged in an inner space of the guard element which is surrounded by the main part of the annular wall.

13. A hair cutting appliance, comprising a main body for a user of the hair cutting appliance to take hold of and a head including at least one hair cutting unit according to claim 12 .

Assignees

• Koninklijke Philips Nv

Inventors

• Veldhuis Mark Klaas Albert
• Silvius Johannes
• Van Tijum Redmer
• Klaseboer Gerrit
• Grobbink Steven Johan
• Grasmeijer Ingmar
• Guillebot Remi Alex

Classifications

• B26B19/14

  of the rotary-cutter type; Cutting heads therefor; Cutters therefor (B26B19/04 takes precedence) · CPC title

• B26B19/143 Primary

  Details of outer cutters · CPC title

• B26B19/00

  Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers · CPC title

• B26B19/20

  with provision for shearing hair of preselected or variable length · CPC title

• B26B19/3826

  Separate accessories · CPC title