CA2591798C - Replaceable accessory for a small electrical appliance and method of determining the period of use of the accessory - Google Patents
Replaceable accessory for a small electrical appliance and method of determining the period of use of the accessory Download PDFInfo
- Publication number
- CA2591798C CA2591798C CA2591798A CA2591798A CA2591798C CA 2591798 C CA2591798 C CA 2591798C CA 2591798 A CA2591798 A CA 2591798A CA 2591798 A CA2591798 A CA 2591798A CA 2591798 C CA2591798 C CA 2591798C
- Authority
- CA
- Canada
- Prior art keywords
- accessory
- value
- stored
- data memory
- appliance
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
- A61C17/221—Control arrangements therefor
-
- 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
Abstract
The invention relates to an accessory for a small-scale electrical unit, for example an attachable brush for an electrical toothbrush or a shaving element for an electrical shaving appliance, said accessory comprising a data memory and a transponder. The inventive accessory also comprises an electronic circuit which modifies a value stored in the data memory whenever it receives a corresponding signal. The invention also relates to a method for determining the end of the period of use of the accessory.
Description
Replaceable Accessory for a Small Electrical Appliance and Method of Determining the Period of Use of the Accessory Field of the Invention This invention relates to accessories, in need of replacement from time to time, for small electrical appliances, such as brush attachments for electric toothbrushes or shaving components for electric shaving apparatus, as well as to a method of determining the period of use or the end of the period of use (wear limit) of the accessory.
Background of the Invention WO 03/054771 Al discloses an electric toothbrush comprising a handpiece and a replaceable brush attachment. The brush attachment accommodates a memory in which information identifying the brush attachment is stored. Furthermore, the brush attachment houses a transponder that delivers the information stored in the memory upon receiving an interrogation signal from an interrogation station. The handpiece houses a microcontroller which is capable of computing the cumulated period of use of the brush attachment identified and writing it into the memory of the brush attachment. The handpiece is also equipped with an indicating device enabling the need for replacement of a brush attachment to be signaled.
DE 102 47 698 Al discloses an electric toothbrush comprised of a grip element and a replaceable bristle head. The grip element is provided with a display on which the end of use of the bristle head can be shown.
Summary of the Invention It is an object of the present invention to provide an accessory for a small electrical appliance which enables the period of use of the accessory to be determined readily, and to provide a simple method of determining the period of use of the accessory.
This object is accomplished with an accessory having a data memory, a transponder and an electronic circuitry which modifies a value stored in the data memory each time it receives a corresponding signal from the small electrical appliance. The value stored in the data memory is, for example, a counter reading which corresponds, for example, to the cumulated period of use of the accessory. Given a predetermined maximum period of use of
Background of the Invention WO 03/054771 Al discloses an electric toothbrush comprising a handpiece and a replaceable brush attachment. The brush attachment accommodates a memory in which information identifying the brush attachment is stored. Furthermore, the brush attachment houses a transponder that delivers the information stored in the memory upon receiving an interrogation signal from an interrogation station. The handpiece houses a microcontroller which is capable of computing the cumulated period of use of the brush attachment identified and writing it into the memory of the brush attachment. The handpiece is also equipped with an indicating device enabling the need for replacement of a brush attachment to be signaled.
DE 102 47 698 Al discloses an electric toothbrush comprised of a grip element and a replaceable bristle head. The grip element is provided with a display on which the end of use of the bristle head can be shown.
Summary of the Invention It is an object of the present invention to provide an accessory for a small electrical appliance which enables the period of use of the accessory to be determined readily, and to provide a simple method of determining the period of use of the accessory.
This object is accomplished with an accessory having a data memory, a transponder and an electronic circuitry which modifies a value stored in the data memory each time it receives a corresponding signal from the small electrical appliance. The value stored in the data memory is, for example, a counter reading which corresponds, for example, to the cumulated period of use of the accessory. Given a predetermined maximum period of use of
2 the accessory, it is also possible to store the remaining period of use, the end of the period of use, or a relative period of use which is related to the maximum period of use.
Such an accessory has the advantage that the period of use is stored in the accessory itself, that is, there is no need for the small electrical appliance to allocate various accessories to their respective periods of use. This advantage is of particular importance in connection with an electric toothbrush whose handpiece is used by several family members attaching their personal brush attachments or in cases where a handpiece is operated with different types of brush attachment, for example, a cleaning brush and a massaging brush.
A small electrical appliance cooperating with the accessory preferably has a transmitting and receiving device known per se, which enables an interrogation signal to be sent and a signal returned by the transponder of the accessory to be received.
In this way the data stored, for example, in the data memory of the accessory can be modified, read out and/or indicated on an indicating device. Data transmission between the small electrical appliance and the accessory can take place by high-frequency signals, for example, which preferably are transmitted inductively. In cases where an accessory has no power supply of its own, the transponder and the electronic circuitry are operated with a supply voltage obtained from the high-frequency field generated by the small electrical appliance.
A particularly simple construction of an accessory of the invention utilizes as signal for modifying the stored value simply the supply voltage developing in the transponder each time the accessory reaches the transmission range of the small electrical appliance, meaning that it is coupled thereto, or when the small electrical appliance with coupled accessory is switched on. In this way a simple use counter is obtained which records the number of uses.
Another construction of an accessory of the invention utilizes for modification of the stored value signals which the small electrical appliance emits during operation at one-second intervals, for example. In this manner, a simple use counter is obtained which records the running time of the accessory accurate to the second.
Brief Description of the Drawing Fig. 1 illustrates a flow chart for an exemplary method according to one embodiment of the invention.
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Such an accessory has the advantage that the period of use is stored in the accessory itself, that is, there is no need for the small electrical appliance to allocate various accessories to their respective periods of use. This advantage is of particular importance in connection with an electric toothbrush whose handpiece is used by several family members attaching their personal brush attachments or in cases where a handpiece is operated with different types of brush attachment, for example, a cleaning brush and a massaging brush.
A small electrical appliance cooperating with the accessory preferably has a transmitting and receiving device known per se, which enables an interrogation signal to be sent and a signal returned by the transponder of the accessory to be received.
In this way the data stored, for example, in the data memory of the accessory can be modified, read out and/or indicated on an indicating device. Data transmission between the small electrical appliance and the accessory can take place by high-frequency signals, for example, which preferably are transmitted inductively. In cases where an accessory has no power supply of its own, the transponder and the electronic circuitry are operated with a supply voltage obtained from the high-frequency field generated by the small electrical appliance.
A particularly simple construction of an accessory of the invention utilizes as signal for modifying the stored value simply the supply voltage developing in the transponder each time the accessory reaches the transmission range of the small electrical appliance, meaning that it is coupled thereto, or when the small electrical appliance with coupled accessory is switched on. In this way a simple use counter is obtained which records the number of uses.
Another construction of an accessory of the invention utilizes for modification of the stored value signals which the small electrical appliance emits during operation at one-second intervals, for example. In this manner, a simple use counter is obtained which records the running time of the accessory accurate to the second.
Brief Description of the Drawing Fig. 1 illustrates a flow chart for an exemplary method according to one embodiment of the invention.
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3 Description of the Preferred Embodiment In a preferred embodiment of an accessory of the invention, the electronic circuitry in the accessory increments the counter reading stored in the data memory by one step each time the small electrical appliance is switched on or on each receipt of a corresponding signal until a maximum value is reached. It is however also possible for the counter reading to be decremented from a predetermined value. The end of the useful life of the accessory can then be detected when the counter reading reaches ZERO. The respective counter reading is transmitted from the transponder to the small electrical appliance. The counter reading is stored in the accessory at least twice, that is, in two memory cells.
On each modification of the value stored in the data memory, the electronic circuitry has to read out the current value of the data memory, modify the value and write it back into the data memory. Preferably, a non-volatile memory, for example, an EEPROM, is used as data memory. Writing into a memory cell of an EEPROM takes several milliseconds and is conventionally preceded by setting all the bits in the memory cell to ZERO. If the power supply, that is, for example, the high-frequency field from which the electronic circuitry draws its energy, breaks down precisely during this time, the write operation is necessarily aborted.
In consequence, the memory holds a meaningless value or the memory contents are lost.
Possible reasons for a failure of the high-frequency field are above all that the user turns the small electrical appliance off again or replaces the accessory, hence removing it from the small electrical appliance or the primary or secondary cell of the small electrical appliance is depleted or supplies a voltage insufficient for building up the high-frequency field.
The likelihood of the high-frequency field failing precisely during the short interval of time when data is written into the data memory may be low. However when the accessory is used frequently as intended, the likelihood of losing the contents of the data memory increases, developing into an annoyance.
The method of the invention for determining the period of use or the end of the period of use of the accessory is based on the following idea:
The counter reading of the use counter must be present in a non-volatile data memory at any time. Only in this way is it ensured that it cannot be lost. Therefore, the data memory
On each modification of the value stored in the data memory, the electronic circuitry has to read out the current value of the data memory, modify the value and write it back into the data memory. Preferably, a non-volatile memory, for example, an EEPROM, is used as data memory. Writing into a memory cell of an EEPROM takes several milliseconds and is conventionally preceded by setting all the bits in the memory cell to ZERO. If the power supply, that is, for example, the high-frequency field from which the electronic circuitry draws its energy, breaks down precisely during this time, the write operation is necessarily aborted.
In consequence, the memory holds a meaningless value or the memory contents are lost.
Possible reasons for a failure of the high-frequency field are above all that the user turns the small electrical appliance off again or replaces the accessory, hence removing it from the small electrical appliance or the primary or secondary cell of the small electrical appliance is depleted or supplies a voltage insufficient for building up the high-frequency field.
The likelihood of the high-frequency field failing precisely during the short interval of time when data is written into the data memory may be low. However when the accessory is used frequently as intended, the likelihood of losing the contents of the data memory increases, developing into an annoyance.
The method of the invention for determining the period of use or the end of the period of use of the accessory is based on the following idea:
The counter reading of the use counter must be present in a non-volatile data memory at any time. Only in this way is it ensured that it cannot be lost. Therefore, the data memory
4 includes at least two memory cells, each holding a counter reading. A suitable data memory is an EEPROM, for example. In a still unused accessory, each of the two memory cells contains a maxim value or ZERO, for example. In addition, each memory cell holds an identifier which enables the electronic circuitry to detect whether or not the value stored in the memory cell is correct or meaningful. This identifier may be in the form of an additional bit, for example, which is stored in the memory cell together with the respective counter reading in a manner known in the art. When a meaningful value is to be modified in the one memory cell, it will not be overwritten by the modified value until it is sure that the other memory cell also holds a meaningful value.
The method of the invention will be explained in the following with reference to an embodiment illustrated in the accompanying Figure 1 showing a flowchart.
After the transponder has emitted a corresponding signal, that is, at least a supply voltage, to the electronic circuitry, the electronic circuitry reads the counter reading out from the first and second memory cell and establishes, by means of the identifier, whether the first memory cell holds a meaningful value. If this is the case, the counter reading of the first memory cell is loaded into a buffer memory and decremented by 1, for example.
Then the decremented counter reading is stored first in the second memory cell and then in the first memory cell. If the first memory cell contains no meaningful value, the counter reading of the second memory cell is loaded into the buffer memory and decremented by 1. Then the decremented counter reading is stored first in the first memory cell and then in the second memory cell. Subsequently, the new counter reading is transmitted from the transponder to the small electrical appliance. This process sequence ensures that at the end both memory cells contain a meaningful value provided that one of the two memory cells contained a meaningful value at the beginning of the process. In the event of failure of the supply voltage of the accessory during the process, it is ensured that at least one of the two memory cells holds a meaningful value.
The small electrical appliance can indicate the received new counter reading on an indicating device which indicates, for example, the remaining number of uses of the accessory until it is in need of replacement, or the indicating device is not activated until the counter reading ZERO is transmitted, which signals that the accessory is worn down and should be replaced.
The method of the invention will be explained in the following with reference to an embodiment illustrated in the accompanying Figure 1 showing a flowchart.
After the transponder has emitted a corresponding signal, that is, at least a supply voltage, to the electronic circuitry, the electronic circuitry reads the counter reading out from the first and second memory cell and establishes, by means of the identifier, whether the first memory cell holds a meaningful value. If this is the case, the counter reading of the first memory cell is loaded into a buffer memory and decremented by 1, for example.
Then the decremented counter reading is stored first in the second memory cell and then in the first memory cell. If the first memory cell contains no meaningful value, the counter reading of the second memory cell is loaded into the buffer memory and decremented by 1. Then the decremented counter reading is stored first in the first memory cell and then in the second memory cell. Subsequently, the new counter reading is transmitted from the transponder to the small electrical appliance. This process sequence ensures that at the end both memory cells contain a meaningful value provided that one of the two memory cells contained a meaningful value at the beginning of the process. In the event of failure of the supply voltage of the accessory during the process, it is ensured that at least one of the two memory cells holds a meaningful value.
The small electrical appliance can indicate the received new counter reading on an indicating device which indicates, for example, the remaining number of uses of the accessory until it is in need of replacement, or the indicating device is not activated until the counter reading ZERO is transmitted, which signals that the accessory is worn down and should be replaced.
Claims (13)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of monitoring usage of an accessory for a small electrical appliance, the method comprising:
providing an accessory including a data memory and a transponder, wherein the accessory is without its own power supply;
coupling the accessory to a small appliance;
modifying a value stored in the data memory each time the accessory receives a corresponding signal from the small electrical appliance wherein the data memory stores at least two values, each provided with an identifier, which correspond to the usage of the accessory, and wherein the signal for the modification of the stored value is a supply voltage building up in the transponder;
determining, by means of the identifier, whether one of the two stored values is correct;
and in response to determining that one of the two stored values is correct, overwriting the correct stored value with a modified value when the accessory is used.
providing an accessory including a data memory and a transponder, wherein the accessory is without its own power supply;
coupling the accessory to a small appliance;
modifying a value stored in the data memory each time the accessory receives a corresponding signal from the small electrical appliance wherein the data memory stores at least two values, each provided with an identifier, which correspond to the usage of the accessory, and wherein the signal for the modification of the stored value is a supply voltage building up in the transponder;
determining, by means of the identifier, whether one of the two stored values is correct;
and in response to determining that one of the two stored values is correct, overwriting the correct stored value with a modified value when the accessory is used.
2. The method according to claim 1, further comprising transmitting the stored value from the transponder to the small electrical appliance.
3. The method according to claim 1 or claim 2, wherein providing an accessory comprises one of providing a toothbrush accessory and providing a shaving apparatus accessory, and wherein modifying the stored value is performed in response to usage of the accessory with the small appliance.
4. The method according to any one of claims 1 to 3, wherein the stored value is modified to indicate at least one of a number of uses, a cumulative time of usage, and a projected end of usable life.
5. The method according to any one of claims 1 to 4, wherein the signal received from the small appliance comprises a high frequency induction signal.
6. The method according to any one of claims 1 to 5, further comprising displaying an indicator that the accessory should be replaced, in response to the stored value reaching a predetermined value.
7. An accessory for a small electrical appliance comprising:
an electronic circuit disposed within the accessory;
a data memory coupled to the electronic circuit within the accessory;
a transponder coupled to the electronic circuit and positioned within the accessory to receive signals from a small appliance with the accessory coupled to the small appliance;
wherein the electronic circuit modifies a value stored in the data memory each time the transponder receives a particular signal from the small electrical appliance to which the accessory is coupled; and wherein the accessory does not have its own power supply and the signal for the modification of the stored value is a supply voltage building up in the transponder.
an electronic circuit disposed within the accessory;
a data memory coupled to the electronic circuit within the accessory;
a transponder coupled to the electronic circuit and positioned within the accessory to receive signals from a small appliance with the accessory coupled to the small appliance;
wherein the electronic circuit modifies a value stored in the data memory each time the transponder receives a particular signal from the small electrical appliance to which the accessory is coupled; and wherein the accessory does not have its own power supply and the signal for the modification of the stored value is a supply voltage building up in the transponder.
8. The accessory according to claim 7, wherein the electronic circuit modifies the value stored in the data memory each time the appliance is switched on with the accessory coupled to the appliance.
9. The accessory according to claim 7 or claim 8, wherein the value stored in the data memory is a counter that corresponds to accessory usage.
10. The accessory according to claim 9, wherein the electronic circuit increments or decrements the counter by one unit upon each receipt of the particular signal until the counter reaches one of a maximum or minimum value indicative of the need to replace the accessory.
11. The accessory according to claim 7, wherein the electronic circuit stores the modified value in the data memory.
12. The accessory according to claim 7, wherein the data memory is an EEPROM
having at least two memory cells in which the counter can be separately stored.
having at least two memory cells in which the counter can be separately stored.
13.
The accessory of claim 7, wherein the small accessory is one of a brush attachment for use with an electric toothbrush and a shaving component for use with an electric shaving apparatus.
The accessory of claim 7, wherein the small accessory is one of a brush attachment for use with an electric toothbrush and a shaving component for use with an electric shaving apparatus.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004062150A DE102004062150A1 (en) | 2004-12-23 | 2004-12-23 | Interchangeable accessory for a small electrical appliance and method for determining the service life of the accessory |
| DE102004062150.0 | 2004-12-23 | ||
| PCT/EP2005/013559 WO2006069644A1 (en) | 2004-12-23 | 2005-12-16 | Replaceable accessory for a small-scale electrical unit, and method for determining the period of use thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2591798A1 CA2591798A1 (en) | 2006-07-06 |
| CA2591798C true CA2591798C (en) | 2015-09-08 |
Family
ID=35945113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2591798A Expired - Fee Related CA2591798C (en) | 2004-12-23 | 2005-12-16 | Replaceable accessory for a small electrical appliance and method of determining the period of use of the accessory |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US8218711B2 (en) |
| EP (1) | EP1827167B1 (en) |
| JP (1) | JP4976312B2 (en) |
| CN (1) | CN101087544B (en) |
| AT (1) | ATE507740T1 (en) |
| CA (1) | CA2591798C (en) |
| DE (2) | DE102004062150A1 (en) |
| DK (1) | DK1827167T3 (en) |
| ES (1) | ES2365720T3 (en) |
| WO (1) | WO2006069644A1 (en) |
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-
2004
- 2004-12-23 DE DE102004062150A patent/DE102004062150A1/en not_active Withdrawn
-
2005
- 2005-12-16 WO PCT/EP2005/013559 patent/WO2006069644A1/en active Application Filing
- 2005-12-16 CA CA2591798A patent/CA2591798C/en not_active Expired - Fee Related
- 2005-12-16 AT AT05819404T patent/ATE507740T1/en active
- 2005-12-16 DK DK05819404.4T patent/DK1827167T3/en active
- 2005-12-16 US US11/722,675 patent/US8218711B2/en active Active
- 2005-12-16 ES ES05819404T patent/ES2365720T3/en active Active
- 2005-12-16 DE DE502005011348T patent/DE502005011348D1/en active Active
- 2005-12-16 JP JP2007547296A patent/JP4976312B2/en not_active Expired - Fee Related
- 2005-12-16 CN CN2005800445767A patent/CN101087544B/en active Active
- 2005-12-16 EP EP05819404A patent/EP1827167B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE502005011348D1 (en) | 2011-06-16 |
| WO2006069644A1 (en) | 2006-07-06 |
| ATE507740T1 (en) | 2011-05-15 |
| US20110122987A1 (en) | 2011-05-26 |
| EP1827167B1 (en) | 2011-05-04 |
| CN101087544A (en) | 2007-12-12 |
| JP2008525067A (en) | 2008-07-17 |
| JP4976312B2 (en) | 2012-07-18 |
| US8218711B2 (en) | 2012-07-10 |
| DE102004062150A1 (en) | 2006-07-13 |
| CA2591798A1 (en) | 2006-07-06 |
| CN101087544B (en) | 2013-06-12 |
| DK1827167T3 (en) | 2011-08-01 |
| ES2365720T3 (en) | 2011-10-10 |
| EP1827167A1 (en) | 2007-09-05 |
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| EEER | Examination request | ||
| MKLA | Lapsed |
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