Toilet – Hair device – Having hair shaping surface or form
Reexamination Certificate
1999-01-27
2001-03-06
Philogene, Pedro (Department: 3732)
Toilet
Hair device
Having hair shaping surface or form
C132S223000, C132S245000, C219S222000
Reexamination Certificate
active
06196236
ABSTRACT:
TECHNICAL FIELD
The present invention is directed to an ultrasonic hair curling device, and more particularly to the ultrasonic hair curling device for curling the hair into coils or spirals by application of ultrasonic vibrations.
BACKGROUND ART
A hair curling device for curling the hair by application of ultrasonic vibrations is disclosed in Japanese Laid-Open Publication No. 8-299046. The device includes a hollow barrel which is formed at one end of a horn transmitting ultrasonic vibrations and around which the hair is wound, so that a hair curling is made by the ultrasonic vibrations transmitted through the barrel. However, in spite of that a hair winding portion is made hollow in order to increase the vibration, a maximum amplitude of vibration occurs at the end of the hollow barrel. Therefore, the middle portion of the barrel actually receiving the hair therearound will not give sufficient ultrasonic vibrations to the hair, resulting in a low energy transmission.
DISCLOSURE OF THE INVENTION
The present invention has been accomplished in order to reduce the above problem and has an object of providing an ultrasonic hair curling device which is capable of efficiently applying the ultrasonic vibration from a limited ultrasonic energy for attaining the effective hair curling in a short time.
The ultrasonic hair curling device in accordance with the present invention includes a housing, an ultrasonic generator incorporated in the housing for generating ultrasonic vibrations, and a horn connected to receive and transmit the ultrasonic vibrations. The horn is formed at its end with a hollow barrel which projects from the housing for receiving therearound a strand of hair to be curled. The main feature of the present invention resides in that the hollow barrel is provided at a portion intermediates at its longitudinal ends with a hair winding zone of which cross-section is smaller than the other portion of the hollow barrel. The hair winding zone of the reduced cross section can vibrate at an amplitude larger than at the front end of the barrel for applying the ultrasonic vibrations efficiently to the hair and making the hair curling effectively.
The hair winding zone may be configured to have a cross-section which is smaller towards a lengthwise center of the hair winding zone than at opposite lengthwise ends of said hair winding zone, or to have a uniform cross-section over its full longitudinal length thereof.
Also, the hair winding zone of reduced cross-section can be realized by a recess formed in an outer surface, an inner surface, or both surfaces of the hollow barrel.
Further, the hair winding zone of reduced cross-section can be realized by provision of a plurality of slits which extend in the axial direction of the hollow barrel and which are spaced circumferentially around the hollow barrel. Defined between the circumferentially spaced adjacent slits are reeds which vibrate in a radial direction as well as in the lengthwise direction of said hollow barrel. Each slit has such a length that causes the reeds to vibrate around at a resonant frequency of said horn when the strand of hair is wound around the hair winding zone. Whereby, the hair winding zone can develop radial vibrations, in addition to having increased the vibration amplitude, for attaining hair curling at an improved efficiency.
The slits have such a length that causes the reeds to vibrate at a frequency higher than the resonant frequency of the horn under a no load condition where the hair winding zone receives no strand of hair.
The hollow barrel may be formed along its length with a plurality of slit groups each composed of the circumferentially spaced slits barrel so that the hair winding portion can extends over a long distance within the length of the barrel without substantially lowering a strength of the barrel. The slits may be arranged in a manner that the slits in one slit group are longitudinally aligned with the slits in the adjacent slit group, or the slits in one slit group are staggered in the circumferential direction with respect to the slits in the adjacent slit group.
In order to avoid the slit from having at the corners thereof an origin of fracture due to stress concentration, each slit is configured to have rounded corners. In addition, each slit may have its periphery surrounded by a reinforcement frame which gives an additional thickness to said periphery of the slit.
Further, the hollow barrel may be additionally formed at its front end with a plurality of open slits. The open slits extend in the lengthwise direction of the hollow barrel and are spaced circumferentially around the hollow barrel to define additional reeds between the circumferentially adjacent open slits, which additional reeds can apply radial vibrations for more improved hair curling.
REFERENCES:
patent: 3001530 (1961-09-01), Julian
patent: 3211159 (1965-10-01), Goble
patent: 3393686 (1968-07-01), Goble
patent: 3526234 (1970-09-01), Chrablow
patent: 3802443 (1974-04-01), Morane
patent: 4023579 (1977-05-01), Suroff
patent: 4695095 (1987-09-01), Barowski et al.
patent: 4742835 (1988-05-01), Boweter
patent: 5875789 (1999-03-01), Shigihara
patent: 8-229046 (1996-11-01), None
patent: WO96/35350 (1996-11-01), None
Abe Hideaki
Adachi Masahiko
Akisada Shosuke
Arikawa Yasushi
Imai Takeshi
Arent Fox Kintner & Plotkin & Kahn, PLLC
Matsushita Electric & Works Ltd.
Philogene Pedro
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