EP0020441A1 - Seche-cheveux. - Google Patents

Seche-cheveux.

Info

Publication number
EP0020441A1
EP0020441A1 EP19790901223 EP79901223A EP0020441A1 EP 0020441 A1 EP0020441 A1 EP 0020441A1 EP 19790901223 EP19790901223 EP 19790901223 EP 79901223 A EP79901223 A EP 79901223A EP 0020441 A1 EP0020441 A1 EP 0020441A1
Authority
EP
European Patent Office
Prior art keywords
motor
casing
hairdryer
housing
heater element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19790901223
Other languages
German (de)
English (en)
Other versions
EP0020441B1 (fr
Inventor
Edric Trenchard Dyer-Hugh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Firth Cleveland Ltd
Original Assignee
Firth Cleveland Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Firth Cleveland Ltd filed Critical Firth Cleveland Ltd
Publication of EP0020441A1 publication Critical patent/EP0020441A1/fr
Application granted granted Critical
Publication of EP0020441B1 publication Critical patent/EP0020441B1/fr
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation

Definitions

  • the invention relates to hairdryers.
  • a conventional hairdryer incorporates an electrical heater element, a fan to provide an air current over the heater element and an electric motor to drive the fan. These essential components are normally mounted in a common housing which incorporates a handle and appropriate controls.
  • Smaller and lighter hairdryers are becoming popular as they are easier to handle than larger hairdryers and also there is a tendency to use a heater element of higher power to increase the effectiveness of the hairdryer.
  • One feature which helps in the provision of a small and lightweight hairdryer is the use of a simple permanent magnet DC electric motor.. Small and compact lightweight DC motors are readily available at low cost. A low voltage DC motor can be used in conjunction with a normal mains supply voltage by making use of the invention disclosed in U.K. Patent 1,100,823 or the equivalent U.S. Patent 3 ? 3 ⁇ 8,020.
  • a simple lightweight motor installed in a small housing close to a high output heater element tends to have a service life which is sufficient for a domestic hairdryer.
  • hairdryers used by pro ⁇ professional hairdressers - which are known as professional hairdryers - require a much longer service life than a domestic hairdryer and the expected life of a simple DC motor is normally inadequate for a professional hairdryer.
  • Replacement of a faulty motor is normally a time consuming operation requiring a high degree of skill and special tools such as soldering irons so it is not normally practical to replace the motor as a matter of routine service by the user of the hairdryer.
  • An object of the present invention is to provide a hairdryer which can be satisfactory for use as a professional hairdryer despite the fact that it uses a simple low cost electric motor with a limited life.
  • hairdryer incorporating a housing, an electric heat element, an electric motor and a fan arranged to be driven the motor to blow air over the heater element to an outle characterised in that the electric motor is removeable fr the housing and incorporates electrical connections which a automatically made as the motor is inserted into position a are automatically broken as the motor is removed. Th enables a user of the hairdryer to replace a burnt out otherwise unserviceable motor.
  • the fan is mounted directly on the mot shaft and is removeable with the motor.
  • the fan itself be a simple low cost item so it can be preferable to repla the fan than to provide for disconnection of the fan from t motor.
  • the motor is mounted in a casing and t casing is removeable from the housing with the electr motor.
  • t casing is removeable from the housing with the electr motor.
  • the casing comprises an inner casing close surrounding the motor, an outer casing and vanes between t inner and outer casing supporting the inner casing and mot within the outer casing. Th s arrangement provides convenient air flow path round the motor.
  • the inner casing and vanes are removeab from the outer casing with the motor so that the motor, inn casing and vanes are replaced when the motor is replaced a the original outer casing can be re-used.
  • the alignment guides may be portions of the vanes projecting from the outer casing and corresponding guides in the interior of the housing.
  • the housing may incorporate a main body including the heater element and also incorporates a handle portion projecting laterally from the heater element having controls for the hairdryer and wherein the motor is mounted in a casing which includes a rear handle portion arranged to co ⁇ operate with the first mentioned handle portion to form a complete handle.
  • the mains connecting lead to the hairdryer may lead into the handle so that it is accessible for connection and disconnection when the casing with its rear handle portion is removed.
  • Figure 1 is a cross sectional view of the complete hairdryer in its assembled condition
  • Figure 2 is a front elevation of the hairdryer
  • Firure 3 is a view corresponding to Figure 1 but showing the ha.-dryer more diagram atically and in its disassembled conditi-n;
  • Figure 4 is a perspective view of internal parts of the hairdryer in the disassembled condition.
  • the hairdryer shown- in the drawings incorporates a housing 11 which may be moulded from tough plastics material.
  • the housing incorporates a generally axial portion 12 which is of circular cross section and is tapered from a lar diameter at its rear end to a smaller diameter at the fr end.
  • the forward part of the housing carries a conventio electric heater element 13.
  • the heater element comprises cruciform support formed from heat resisting sheet materi
  • the support comprises an upright sheet mem 15 and two transverse interlocking sheet members 16.
  • series of notches 17 are spaced out along an elongated rec 18 at all four extremities of the cruciform.
  • the recess serve to receive a coiled wire heater coil 14 which is wo in a helix around the cruciform and the notches serve locate and space apart the individual convolutions of element.
  • a shroud 19 of heat resistant material surrou the heater coil and also serves to strengthen the crucifor
  • the heater element also incorporates a conventional ther cut-out 21 which is arranged to break the electrical circ through the heater coil if the local temperature rises abo an acceptable level.
  • the heater element 13 is secured in t housing 11 between a front end closure 22 and a print circuit board 23 both of which will be described in furt detail.
  • the closure 22 incorporates a series of radial circumferential ribs 24 as best seen in Figure 2 and is su that air can flow freely through it but fingers of a us cannot penetrate into the heater element.
  • the closure 23 secured in position by a wedge action and possibly also means of an adhesive or by positive engagement of inte locking lugs.
  • the printed circuit board 23 carries several electric components and connections for the hairdryer including t power supply to the heater element.
  • the circuit board also carry a bridge rectifier to produce DC from AC. Detai of the electrical compoments and connections are a matter choice dependent on the type of circuitry and contro required for the hairdryer and so are not shown in detai
  • the printed circuit board is secured to the upright 15 of the cruciform by means such as rivets at 25 and 26 and this mechanical connection may also serve as the electrical connection between the circuit board and the heater element.
  • the printed circuit board also carries two socket members 28 and 29 best seen in Figure 4 which are intended for connection to the electric motor as will be described in further detail subsequently.
  • the housing also has a handle portion 31 incorporating an electrical switch assembly 32.
  • the switch assembly may be a simple on-off switch or may be a more complex switch assembly such as a slow-off-fast switch and a separate hot- warm switch.
  • the switch assembly constitutes a control for the hairdryer.
  • the handle portion of the housing also carries a terminal block 33 by means of which a mains lead 34 which extends from the base of the handle is connected to the hairdryer.
  • a small compact electric motor 35 is provided and is preferably in the form of a permanent magnet DC motor.
  • the motor is supported in an inner casing 36 best seen in Figure 4 which is formed integrally with four radial vanes 37.
  • the vanes 37 are provided to support the motor in an outer casing 38.
  • the outer casing 38 is generally cylindrical and in the assembled hairdryer forms a rearward extension of the housing 11. Lugs 39 projecting outwardly from the outer edge of the vanes 37 and locate in corresponding notches in the inner surface of the outer casing 38 and thus serve to locate the motor 35 accurately within the outer casing.
  • the motor drives an axial flow fan 41 which is secu directly to the motor output shaft 42. Air propelled by fan enters the outer casing through an end grille 43 flows over the motor between the inner and outer casings.
  • the outer casing 38 also incorporates a handle port 44 which co-operates with the handle portion 31 of housing to form a completely closed handle.
  • the han portion 44 closes off the access to the switch assembly and also closes off access to the terminal block 33 for mains connection.
  • access to these components is availabl
  • the casing 38 is secured to the housing 11 by means three screws.
  • One of these screws 45 is shown clearly in handle in Figure 1.
  • the other screws 46 and 47 associated with lugs 48 and 49 respectively which are for partly on the housing and partly on the outer casing.
  • these l act as support brackets which enable the hairdryer to supported in a stand.
  • the forward end of the motor 35 carries an insulat board 51 which carries two electrical connection pins 52 53 which are electrically connected through to the mo itself.
  • alignment gui constituted by forwardly extending parts of the vanes which engage in grooves such as continuations of the groo 27 for the printed circuit board 23. It is a simple mat for an operator to ensure that these guides are prope engaged with each other as the housing and casing are mo together and this ensures that the accurately positioned pins and sockets automatically come into correct engagement.
  • the controls are set to give a suitable motor and fan speed and a suitable heat output from the - heater element and the fan blows air through the heater element so that the heated air flows out of the front end .of the hairdryer. If the motor 35 burns out or otherwise ceases to function, the thermal cut-out 21 prevents the heater element from overheating. It is then a simple matter to disconnect the hairdryer from the mains supply, unfasten the three screws 45, . 46 and 47 and thereby separate the casing from the housing. The motor 35 comes away from the housing with the outer casing 38. The motor 35, fan 41, inner casing 36 and vanes 37 can then be removed as a unit from the outer casing and discarded. A similar new unit is then inserted in the outer casing and the outer casing is again joined to the housing by the three screws. The hairdryer is then fully serviceable again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning And Drying Hair (AREA)

Abstract

Un seche-cheveux comprend une enceinte (11) qui contient un element de chauffage electrique (13) et un commutateur de commande ou des commutateurs de commande pour le seche-cheveux. Un moteur electrique (35) entraine un ventilateur (41) qui souffle de l'air a travers l'element de chauffage pour produire un courant d'air chauffe. Le moteur est monte dans un boitier (38) qui est amovible par rapport a l'enceinte (11) et, est electriquement connecte au reste du seche-cheveux par des prises (52, 53) et des douilles (28, 29) qui s'engagent et se degagent automatiquement lors du montage du boitier dans l'enceinte. Cette disposition permet de changer de maniere tres simple un moteur grille.
EP19790901223 1978-10-20 1979-10-18 Seche-cheveux Expired EP0020441B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7841341 1978-10-20
GB4134178 1978-10-20

Publications (2)

Publication Number Publication Date
EP0020441A1 true EP0020441A1 (fr) 1981-01-07
EP0020441B1 EP0020441B1 (fr) 1982-09-22

Family

ID=10500469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790901223 Expired EP0020441B1 (fr) 1978-10-20 1979-10-18 Seche-cheveux

Country Status (4)

Country Link
EP (1) EP0020441B1 (fr)
JP (1) JPS55501128A (fr)
DE (1) DE2963745D1 (fr)
WO (1) WO1980000783A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520844A1 (fr) * 1982-02-03 1983-08-05 Chausson Usines Sa Support pour mecanismes divers du genre moto-ventilateurs, compresseurs, pompes et analogues
US4658511A (en) * 1984-09-19 1987-04-21 Robert Krups Stiftung & Co. Kg Electric hair dryer with air dispersing hood
DE3807287C2 (de) * 1988-03-05 1997-07-10 Krups Fa Robert Elektrisch betriebener Handhaartrockner
EP0306765B1 (fr) 1987-09-05 1992-04-22 Robert Krups GmbH & Co. KG Sèche-cheveux à main
DE3802638C2 (de) * 1988-01-29 1995-11-02 Krups Fa Robert Elektrisch betriebener Handhaartrockner
US4794225A (en) * 1987-10-09 1988-12-27 Maese Hector L Tube axial handheld blow dryer for hair
KR900700035A (ko) * 1988-03-07 1990-08-11 원본 미기재 복합 헤어드라이어
DE4234147A1 (de) * 1992-10-09 1994-04-14 Bosch Siemens Hausgeraete Gehäuse zur Aufnahme eines elektrischen Gerätes
TR27590A (tr) * 1993-11-15 1995-06-13 Bosch Siemens Hausgeraete Bir elektrikli cihazi icine almaya mahsus mahfaza.
CN201341552Y (zh) 2008-12-29 2009-11-11 刘亚福 电吹风
TWI507149B (zh) * 2009-09-14 2015-11-11 Tai Wah Distributors Pte Ltd 吹風機
GB201211253D0 (en) * 2012-06-25 2012-08-08 Jemella Ltd Hair dryer
GB2500733B (en) 2012-06-25 2014-05-21 Jemella Ltd Hair styling appliance
GB2505171A (en) 2012-08-20 2014-02-26 Jemella Ltd A hair styling apparatus with a resiliently flexible portion
GB2555310B (en) 2012-12-03 2018-07-18 Jemella Ltd Hair styling apparatus
GB2518656B (en) * 2013-09-27 2016-04-13 Dyson Technology Ltd Hand held appliance
CN108548320A (zh) * 2018-05-10 2018-09-18 嘉兴众衡电气科技有限公司 一种控制器外置的家用暖风机

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH179598A (de) * 1935-01-18 1935-09-15 Kummler & Matter Ag Elektrische Heissluftdusche.
GB639113A (en) * 1944-09-26 1950-06-21 Albert Reynolds Improvements relating to hair drying appliances
US2678376A (en) * 1952-07-29 1954-05-11 Harry A Lockwood Hair drier
GB845236A (en) * 1957-10-28 1960-08-17 Salo David Rand Improvements in or relating to electric fans
US2962576A (en) * 1958-07-21 1960-11-29 Handy Hannah Products Corp Hair dryer
FR1310403A (fr) * 1962-01-16 1962-11-23 Elettroplastica Sèche-cheveux réalisé sous la forme d'un corps de volatile
FR1496573A (fr) * 1965-10-22 1967-09-29 Sèche-cheveux électrique
CH541305A (de) * 1972-06-26 1973-09-15 Gimelli & Co Ag Heissluftgerät für Haarbehandlung
CH588835A5 (en) * 1975-10-27 1977-06-15 Gimelli & Co Ag Hot air hair dryer - has two stage control by grip switch and rod acting on pressure switches in lengthways movements from handle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8000783A1 *

Also Published As

Publication number Publication date
WO1980000783A1 (fr) 1980-05-01
JPS55501128A (fr) 1980-12-18
DE2963745D1 (en) 1982-11-04
EP0020441B1 (fr) 1982-09-22

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