WO2007039879A1 - Magnetic actuated wear indicator for personal care appliances - Google Patents
Magnetic actuated wear indicator for personal care appliances Download PDFInfo
- Publication number
- WO2007039879A1 WO2007039879A1 PCT/IB2006/053636 IB2006053636W WO2007039879A1 WO 2007039879 A1 WO2007039879 A1 WO 2007039879A1 IB 2006053636 W IB2006053636 W IB 2006053636W WO 2007039879 A1 WO2007039879 A1 WO 2007039879A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wear indicator
- workpiece
- water
- replaced
- appliance
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B15/00—Other brushes; Brushes with additional arrangements
- A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B15/00—Other brushes; Brushes with additional arrangements
- A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
- A46B15/0004—Arrangements for enhancing monitoring or controlling the brushing process with a controlling means
- A46B15/001—Arrangements for enhancing monitoring or controlling the brushing process with a controlling means with means indicating the remaining useful life of brush
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B2200/00—Brushes characterized by their functions, uses or applications
- A46B2200/10—For human or animal care
- A46B2200/1066—Toothbrush for cleaning the teeth or dentures
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
- A61C17/16—Power-driven cleaning or polishing devices
Definitions
- This invention relates generally to personal care appliances, and more specifically concerns a wear indicator for such an appliance, such as for a brushhead portion of a power toothbrush.
- a reliable wear indicator within the appliance which indicates clearly to the user that it is time to replace the workpiece. It is important that the indication be reliable relative to the actual physical condition of the workpiece and further that the indication be clear and readily interpretable by a user. Still further, it is usually important that a wear indicator be convenient to implement in a particular appliance of interest and not add significant additional expense to the appliance.
- Wear indicators are well known for various appliances. These include devices which count the number of uses of the appliance, as well as devices which detect actual physical wear on the workpiece which occurs because of use. For example, in the case of a toothbrush, as the bristles wear away during use, various indicator arrangements within the bristles are revealed, including a different color, as the wear on the bristles reaches a selected depth.
- a workpiece wear indicator which is both reliable, i.e. the indication provided correlates with the actual physical condition of the workpiece, and which is clearly interpretable by a user that it is time to replace the workpiece.
- a personal care appliance and a workpiece associated therewith which uses a wear indicator is a brushhead portion of an electric toothbrush.
- Another example is a blade or cutting head on an electric shaver.
- Other examples will readily occur to one skilled in the art.
- the invention is a wear indicator for a workpiece portion of a personal care appliance, comprising a first member having magnetic particles therein, wherein the member is characterized by a reaction to repeated contact with water over time such that as the appliance is used, the layer member gradually changes state, permitting the magnetic particles therein to become oriented, under the influence of an adjacent magnet member, into a recognizable image, which indicates that the workpiece should be replaced; and a magnet member positioned close to the first member, such that it can influence the position of the magnetic particles in the first member into said recognizable image upon a sufficient change of state from the original condition of the first member, wherein the appearance of said recognizable image indicates that the workpiece should be replaced.
- Figure 1 shows a personal care appliance, in particular an electric toothbrush, showing in general the position of the wear indicator of the present invention.
- Figures 2 A and 2B show a first embodiment of the present wear indicator.
- Figure 3 shows a representative image which is presented to the user when the wear indicator determines that it is time to replace the workpiece.
- Figure 4A and 4B show a second embodiment of the wear indicator.
- FIG. 1 shows a wear indicator of the present invention incorporated in an electric toothbrush.
- the wear indicator shown generally at 10, is embedded into a base portion 12 of brushhead 14, which comprises a part of a conventional electric toothbrush 16.
- the wear indicator 10 can be used for a wide variety of electric toothbrush arrangements. Also, it should be understood that the wear indicator 10 described herein can be used on other personal care appliances which include a workpiece which requires periodic replacement for continuing effective action.
- a first embodiment of the wear indicator 10 is shown in Figures 2 A and 2B.
- the wear indicator includes a water-soluble material member/layer 20.
- the size of layer 20 can vary, but in one embodiment, it could be 10 100 microns thick.
- the primary requirement is that the magnetic particles have space to move (reorient) when a magnetic field forces the particles into a different orientation and such that the effect is visible.
- water-soluble member 20 examples include water-soluble polymers, such as polyvinyl alcohol (PVA), polyvinyl pyrrolidon (PVP) and other similar materials.
- Layer 20 has magnetic particles 22 embedded therein.
- the magnetic particles 22 can comprise basically any material which is responsive to magnetic action, such as various iron oxides and other materials, including specialized pigments which respond to magnetic action, such as iron oxide coated flake-like pigments.
- the particles 22 are embedded in member 20 in a random fashion with no particular arrangement or oriented state.
- the wear indicator 10 also includes a magnet member 24 positioned adjacent to or in contact with the lower surface 25 of member 20.
- the member/layer 20 will come into contact with water.
- Member 20 becomes wet and either begins to slowly dissolve or to swell.
- the particles 22 will gradually move/reorient themselves under the influence of magnetic element 24, until they form a three-dimensional image, along the magnetic field lines produced by the magnetic member.
- the size of the magnet and the orientation of the magnetic poles will determine the visual effect.
- the three-dimensional image indicates clearly to the user that replacement of the workpiece, e.g. the toothbrush brushhead, is appropriate.
- FIG. 3 Such an image is shown at 26 in Figure 3.
- the round 3 D image 26 is produced by the use of a round magnet.
- Other image configurations can be produced using different shaped magnet elements.
- Figure 2B shows the reorientation of particles 22 into the 3 D image of Figure 3, from the planar arrangement shown in Figure 2A.
- the sensitivity of the wear indicator 10 can be changed in several ways.
- the sensitivity of member 20 can be varied by adjusting the chemical composition of the material and, in the case of polymers, adjusting the crosslink density. This will change the rate/manner of dissolution/swelling of the water-soluble member, so as to provide an accurate, reliable indication of wear of the workpiece.
- the strength of the magnet member 24 can also be varied. Further, different magnet configurations can be used which have the capability of producing particular image forms.
- Figures 4 A and 4B show another embodiment of the invention, which includes a structure similar to Figures 2A and 2B, with a water-soluble, magnetic particle-containing member 40 and a magnet member 42.
- This embodiment includes an upper layer 44 of water-soluble material on top of member 40.
- Member 44 has no magnetic particles, but is characterized by gradually dissolving upon contact with water, and hence delaying the exposure of the active member 40 (with the magnetic particles) to water. The thickness of the delay layer 44 can be adjusted so that the unit as a whole can provide an accurate indication of wear, based on use.
- Figure 4B shows the delay layer 44 completely dissolved, and the realignment of magnetic particles 48 within member 40 into a recognizable configuration, such as shown in Figure 3.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/089,244 US20080295760A1 (en) | 2005-10-04 | 2006-10-04 | Magnetic Actuated Wear Indicator for Personal Care Appliances |
EP06809502A EP1933665B1 (en) | 2005-10-04 | 2006-10-04 | Magnetic actuated wear indicator for personal care appliances |
JP2008534138A JP2009509710A (en) | 2005-10-04 | 2006-10-04 | Magnetically actuated wear indicator for personal care devices |
DE602006005947T DE602006005947D1 (en) | 2005-10-04 | 2006-10-04 | MAGNETICALLY ACTUATED WEAR INDICATOR FOR BODY CARE INSTRUMENTS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72338505P | 2005-10-04 | 2005-10-04 | |
US60/723,385 | 2005-10-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007039879A1 true WO2007039879A1 (en) | 2007-04-12 |
Family
ID=37709676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2006/053636 WO2007039879A1 (en) | 2005-10-04 | 2006-10-04 | Magnetic actuated wear indicator for personal care appliances |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080295760A1 (en) |
EP (1) | EP1933665B1 (en) |
JP (1) | JP2009509710A (en) |
CN (1) | CN101277629A (en) |
AT (1) | ATE426346T1 (en) |
DE (1) | DE602006005947D1 (en) |
WO (1) | WO2007039879A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2573463C (en) * | 2006-01-06 | 2013-07-23 | Craig Edward Harder | Magnetic wear device |
US8202230B2 (en) * | 2009-08-20 | 2012-06-19 | Colgate-Palmolive Company | Oral care implement having a liquid collection system |
HUE026118T2 (en) * | 2013-04-18 | 2016-05-30 | Refractory Intellectual Property Gmbh & Co Kg | Wear indicator in a composite system of refractory ceramic bricks |
US9307827B2 (en) * | 2014-06-13 | 2016-04-12 | L'oreal | Replacement indicating workpiece |
US10021964B2 (en) | 2014-06-13 | 2018-07-17 | L'oreal | Replacement indicating brush |
US10582764B2 (en) | 2016-11-14 | 2020-03-10 | Colgate-Palmolive Company | Oral care system and method |
US10835028B2 (en) | 2016-11-14 | 2020-11-17 | Colgate-Palmolive Company | Oral care system and method |
US11213120B2 (en) | 2016-11-14 | 2022-01-04 | Colgate-Palmolive Company | Oral care system and method |
US11043141B2 (en) | 2016-11-14 | 2021-06-22 | Colgate-Palmolive Company | Oral care system and method |
US11361672B2 (en) | 2016-11-14 | 2022-06-14 | Colgate-Palmolive Company | Oral care system and method |
USD887719S1 (en) * | 2020-01-06 | 2020-06-23 | Juanyun Kuang | Toothbrush head |
USD954443S1 (en) * | 2021-04-09 | 2022-06-14 | Jiang Huang | Power toothbrush head |
USD959149S1 (en) * | 2021-08-05 | 2022-08-02 | Ting Cao | Toothbrush head |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996001172A1 (en) * | 1994-07-01 | 1996-01-18 | The Gillette Company | Shaving system |
US5603161A (en) * | 1995-06-07 | 1997-02-18 | Welsh; Christopher A. | Wear indicating shaving strip and blade assembly for a shaver |
US5906834A (en) * | 1992-06-15 | 1999-05-25 | The Gillette Company | Color changing matrix as wear indicator |
WO2004002267A1 (en) * | 2002-06-27 | 2004-01-08 | Koninklijke Philips Electronics N.V. | Wear-indicating filament |
WO2004018161A2 (en) * | 2002-08-21 | 2004-03-04 | Eveready Battery Company, Inc. | Razor system having razor sensors |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5124217A (en) * | 1990-06-27 | 1992-06-23 | Xerox Corporation | Magnetic image character recognition processes |
CA2116115C (en) * | 1991-08-23 | 2000-05-16 | Mingchih M. Tseng | Sustained-release matrices for dental application |
US5667924A (en) * | 1996-02-14 | 1997-09-16 | Xerox Corporation | Superparamagnetic image character recognition compositions and processes of making and using |
US6786153B2 (en) * | 2002-09-19 | 2004-09-07 | Interflex Laser Engravers, Llc | Printing rolls having wear indicators and methods for determining wear of printing and anilox rolls and sleeves |
US5947053A (en) * | 1998-01-09 | 1999-09-07 | International Business Machines Corporation | Wear-through detector for multilayered parts and methods of using same |
US6735802B1 (en) * | 2000-05-09 | 2004-05-18 | Koninklijke Philips Electronics N.V. | Brushhead replacement indicator system for power toothbrushes |
JP2002054669A (en) * | 2000-08-10 | 2002-02-20 | Sumitomo Denko Brake Systems Kk | Pad for disc brake |
US6904243B2 (en) * | 2002-06-07 | 2005-06-07 | Hewlett-Packard Development Company, L.P. | Image forming system and method and photoconductor having wear indicator |
US20090084638A1 (en) * | 2004-12-30 | 2009-04-02 | Masterson Steven J | Disc brake pad with visual wear indicator |
CA2592667C (en) * | 2006-07-12 | 2014-05-13 | Jds Uniphase Corporation | Stamping a coating of cured field aligned special effect flakes and image formed thereby |
-
2006
- 2006-10-04 US US12/089,244 patent/US20080295760A1/en not_active Abandoned
- 2006-10-04 WO PCT/IB2006/053636 patent/WO2007039879A1/en active Application Filing
- 2006-10-04 DE DE602006005947T patent/DE602006005947D1/en not_active Expired - Fee Related
- 2006-10-04 AT AT06809502T patent/ATE426346T1/en not_active IP Right Cessation
- 2006-10-04 JP JP2008534138A patent/JP2009509710A/en active Pending
- 2006-10-04 EP EP06809502A patent/EP1933665B1/en not_active Not-in-force
- 2006-10-04 CN CNA200680036806XA patent/CN101277629A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5906834A (en) * | 1992-06-15 | 1999-05-25 | The Gillette Company | Color changing matrix as wear indicator |
WO1996001172A1 (en) * | 1994-07-01 | 1996-01-18 | The Gillette Company | Shaving system |
US5603161A (en) * | 1995-06-07 | 1997-02-18 | Welsh; Christopher A. | Wear indicating shaving strip and blade assembly for a shaver |
WO2004002267A1 (en) * | 2002-06-27 | 2004-01-08 | Koninklijke Philips Electronics N.V. | Wear-indicating filament |
WO2004018161A2 (en) * | 2002-08-21 | 2004-03-04 | Eveready Battery Company, Inc. | Razor system having razor sensors |
Also Published As
Publication number | Publication date |
---|---|
EP1933665B1 (en) | 2009-03-25 |
JP2009509710A (en) | 2009-03-12 |
US20080295760A1 (en) | 2008-12-04 |
DE602006005947D1 (en) | 2009-05-07 |
CN101277629A (en) | 2008-10-01 |
ATE426346T1 (en) | 2009-04-15 |
EP1933665A1 (en) | 2008-06-25 |
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