Electrically operated toothbrushes - Methods for measuring the performance

IEC 63174:2021 applies to electrically operated toothbrushes used for electric cleaning of teeth. Rechargeable toothbrushes and primary battery operated toothbrushes, both for adults and children, are within the scope of this document.
This document describes the test methods for measurement of the performance parameters as listed in Clause 4.
The purpose of this document is only to specify the measurement method; it does not define any limit values.

Brosses à dents électriques - Méthodes de mesure de l'aptitude à la fonction

L'IEC 63174:2021 s'applique aux brosses à dents électriques utilisées pour le brossage électrique des dents. Les brosses à dents rechargeables et les brosses à dents à piles, destinées aux adultes et aux enfants, relèvent du domaine d'application de la présente norme.
Le présent document décrit les méthodes d’essai pour le mesurage des paramètres d’aptitude à la fonction dont la liste figure à l’Article 4.
Le présent document a pour unique objet de spécifier la méthode de mesure applicable; il ne définit pas de valeurs limites.

General Information

Status
Published
Publication Date
28-Nov-2021
Current Stage
PPUB - Publication issued
Completion Date
29-Nov-2021
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IEC 63174
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrically operated toothbrushes – Methods for measuring the performance
Brosses à dents électriques – Méthodes de mesure de l'aptitude à la fonction
IEC 63174:2021-11(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 63174
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrically operated toothbrushes – Methods for measuring the performance
Brosses à dents électriques – Méthodes de mesure de l'aptitude à la fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.030 ISBN 978-2-8322-1056-9

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 63174:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 Items to be measured ...................................................................................................... 7

5 Testing method ................................................................................................................ 8

5.1 Conditions for the tests ........................................................................................... 8

5.2 Preparation of the test sample ................................................................................ 8

5.3 Weight of electrically operated toothbrush............................................................... 8

5.4 Measurement of vibration frequency ....................................................................... 8

5.5 Measurement of rotation speed ............................................................................... 8

5.6 Hours taken to fully charge the rechargeable toothbrush ......................................... 8

5.7 Working time after each charging or battery replacement ........................................ 9

5.8 Electrical endurance ............................................................................................... 9

5.9 Mechanical endurance .......................................................................................... 10

5.10 Button operation endurance .................................................................................. 14

5.11 Stand-by power consumption ................................................................................ 14

Figure 1 – Measurement of charging current for rechargeable toothbrush ............................. 11

Figure 2 – Setup for drop tests.............................................................................................. 12

Table 1 – Appearance inspection .......................................................................................... 13

Table 2 – Starting-up inspection ........................................................................................... 13

Table 3 – Rotation speed or vibration frequency of motor ..................................................... 13

Table 4 – Charging function .................................................................................................. 13

---------------------- Page: 4 ----------------------
IEC 63174:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICALLY OPERATED TOOTHBRUSHES –
METHODS FOR MEASURING THE PERFORMANCE
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

IEC 63174 has been prepared by subcommittee 59L: Small household appliances, of IEC

technical committee 59: Performance of household and similar electrical appliances. It is an

International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
59L/208/FDIS 59L/211/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.
---------------------- Page: 5 ----------------------
– 4 – IEC 63174:2021 © IEC 2021
Terms in bold in the text are defined in Clause 3.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates

that it contains colours which are considered to be useful for the correct understanding

of its contents. Users should therefore print this document using a colour printer.

---------------------- Page: 6 ----------------------
IEC 63174:2021 © IEC 2021 – 5 –
ELECTRICALLY OPERATED TOOTHBRUSHES –
METHODS FOR MEASURING THE PERFORMANCE
1 Scope

This document applies to electrically operated toothbrushes used for electric cleaning of

teeth. Rechargeable toothbrushes and primary battery operated toothbrushes, both for

adults and children, are within the scope of this document.

This document describes the test methods for measurement of the performance parameters as

listed in Clause 4.

The purpose of this document is only to specify the measurement method; it does not define

any limit values.
NOTE The electrically operated toothbrushes are classified as follows:
Classification with regard to supply modes:
– primary battery operated toothbrush;
– rechargeable toothbrush:
• wireless rechargeable toothbrush;
• corded rechargeable toothbrush.
Classification with regard to operating modes:
– rotary electrically operated toothbrush;
– reciprocating electrically operated toothbrush:
• linear reciprocating electrically operated toothbrush;
• rotational reciprocating electrically operated toothbrush;
– vibratory electrically operated toothbrush.

The different types are explained for information only, since the tests to be carried out are identical, except for

primary battery operated toothbrushes and rechargeable toothbrushes.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

amendments) applies.
IEC 62301, Household electrical appliances – Measurement of standby power
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
---------------------- Page: 7 ----------------------
– 6 – IEC 63174:2021 © IEC 2021
3.1
electrically operated toothbrush

hand-held electrically operated appliance, the brush head of which carries filaments, used

primarily for cleaning surfaces within the oral cavity by means of a reciprocating, rotating, or

vibrating brush
3.2
rechargeable toothbrush
electrically operated toothbrush powered by incorporated rechargeable batteries
3.3
wireless rechargeable toothbrush

rechargeable toothbrush that is charged with a wireless charging device (electro-magnetic

induction)
3.4
corded rechargeable toothbrush

rechargeable toothbrush that is charged by connecting a charging device to a connector

3.5
primary battery operated toothbrush

electrically operated toothbrush deriving its energy solely from non-rechargeable batteries

3.6
head

end part of electrically operated toothbrush with a non-detachable or detachable brush

3.7
rotary electrically operated toothbrush

electrically operated toothbrush fitted with a round brush head acting in a rotating motion

Note 1 to entry: The direction of rotation can oscillate during the cycle.
3.8
reciprocating electrically operated toothbrush

electrically operated toothbrush fitted with a brush head acting in a reciprocating motion

Note 1 to entry: An example of reciprocating motion is a back-and-forth motion along the long axis of the toothbrush,

or reciprocating rotational motion around the long axis of the toothbrush.
3.8.1
linear reciprocating electrically operated toothbrush

reciprocating electrically operated toothbrush whose reciprocating motion is back and forth

along the longitudinal axis of the toothbrush
---------------------- Page: 8 ----------------------
IEC 63174:2021 © IEC 2021 – 7 –
3.8.2
rotational reciprocating electrically operated toothbrush

reciprocating electrically operated toothbrush whose reciprocating motion is rotational

about the longitudinal axis of the toothbrush
3.9
vibratory electrically operated toothbrush

electrically operated toothbrush fitted with a brush head acting in a vibrating motion

Note 1 to entry: Vibrations are continuous slight shaking motions of the brush head without moving in any particular

direction.
4 Items to be measured
– Weight of the toothbrush
– Vibration frequency
– Rotational speed
– Hours taken to fully charge the rechargeable toothbrush
– Working minutes after each charging or battery replacement
– Electrical endurance
– Mechanical endurance
– Button operation endurance
– Stand-by power
---------------------- Page: 9 ----------------------
– 8 – IEC 63174:2021 © IEC 2021
5 Testing method
5.1 Conditions for the tests

5.1.1 Unless otherwise specified, tests are carried out under the following environmental

conditions:
– Temperature: 20 °C ± 5 °C
– Relative humidity: 50 %

5.1.2 Samples shall be tested under the operational conditions specified in the instructions

for use.

5.1.3 The power supply used for the tests shall be the same as that specified for the

electrically operated toothbrush. If the electrically operated toothbrush is provided with

more than one power supply, it shall be tested with the one that gives the most unfavorable

results.
5.2 Preparation of the test sample

For rechargeable toothbrushes, the sample is fully charged and discharged two times before

subjecting it to the tests from 5.3 to 5.11.
5.3 Weight of electrically operated toothbrush

The hand-held part of the sample is weighed with scales and the weight is recorded in g.

5.4 Measurement of vibration frequency
The rechargeable toothbrush is fully charged.

The primary battery operated toothbrush is supplied from an external DC supply with the

voltage equal to the battery’s rated voltage, as specified in the instructions for use.

The toothbrush shall run under no-load condition for 1 min.

The vibration frequency is measured by a stroboscope. The recorded value for vibration

frequency shall be the average value of three consecutive measurements.
5.5 Measurement of rotation speed
The rechargeable toothbrush is fully charged.

The primary battery operated toothbrush is supplied from an external DC supply with the

voltage equal to the battery’s rated voltage as specified in the instructions for use.

The toothbrush shall run under no-load condition for 1 min.

The rotational speed is measured by a stroboscope or digital speedometer. The recorded value

for rotational speed shall be the average value of three consecutive measurements.

5.6 Hours taken to fully charge the rechargeable toothbrush

The sample is fully charged and then discharged until the rotation speed or vibrating speed falls

to zero. The sample is connected to the charger in accordance with the instructions for use and

the measurement of time is started. Measurement of time is stopped as soon as the fully-

charged signal is on. The time from starting to stopping is recorded in hours.
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IEC 63174:2021 © IEC 2021 – 9 –
5.7 Working time after each charging or battery replacement

5.7.1 Determination of working time of rechargeable toothbrush after fully charging

The sample is fully charged and discharged. Then it is fully recharged in accordance with the

instructions for use. When it is fully charged, the toothbrush is disconnected from the power

supply and is left to rest for 1 h.

The toothbrush is then operated under no-load condition, at the maximum working mode for

2 min and switched off for 2 min. This on-off cycle is repeated until the toothbrush is out of

power and stops running. All on times during the test are accumulated and recorded in minutes.

NOTE Any low-energy prompting is ignored.
5.7.2 Determination of working time of primary battery operated toothbrush after
battery replacement

The toothbrush is supplied from an external DC supply with a voltage equivalent to the nominal

voltage of the primary battery, as marked on the toothbrush or specified in the instructions for

use. The toothbrush is adjusted to the maximum working mode, then it is operated under no-

load conditions for 2 min and switched off for 2 min. The test is repeated in such cycles.

A voltammeter is used to measure the energy consumption ε (Wh) of the toothbrush during the

cycles. The test is terminated when the energy consumption ε (Wh) is equal to the reference

energy (ε ) of the battery.

When the instructions for use state that one LR03 cell is used, the reference energy (ε ) of the

battery is 1,0 Wh. When the instructions for use state that one LR6 cell is used, the reference

energy (ε ) of the battery is 2,8 Wh. When the instructions for use state that two LR6 cells are

used, the reference energy (ε ) of the battery is 3,5 Wh.

The accumulated working time during the test is calculated and recorded in minutes.

5.8 Electrical endurance

5.8.1 The rechargeable toothbrush is fully charged in accordance with the instructions for

use at rated frequency and rated voltage. The toothbrush is operated according to the no-load

test condition specified in 5.1 for 2 min, then stopped and rested for 2 min. This cycle is

repeated until the toothbrush (including the charger) stops working or until the established

number of cycles is reached, whichever is shorter. The accumulated working time is recorded.

During this period, the toothbrush shall be recharged in accordance with the instructions for

use when it is out of power.

NOTE The established number of cycles can be agreed between the manufacturer or the client and the laboratory

before the test.

5.8.2 For primary battery operated toothbrushes, an equivalent DC supply with the

voltage equal to the battery’s rated voltage, as specified in the instructions, is used to power

the toothbrush. The toothbrush is operated in accordance with the no-load test condition

specified in 5.1 for 2 min, then stopped and rested for 2 min. This cycle is repeated until the

toothbrush stops to work or until the established number of cycles is reached, whichever is

shorter. The accumulated working time is recorded.

NOTE The established number of cycles can be agreed between the manufacturer or the client and the laboratory

before the endurance test.
---------------------- Page: 11 ----------------------
– 10 – IEC 63174:2021 © IEC 2021
5.9 Mechanical endurance
5.9.1 Preparation of the drop test

5.9.1.1 Prior to the drop test, the appearance and the normal operation of the sample is

checked. The sample shall be complete, in good order, and in normal starting-up, charging and

motor rotation. Inspection is carried out in accordance with 5.9.1.2 to 5.9.1.4.
The inspection result shall be recorded in Table 1 to Table 4.
NOTE Pictures can be used to show the state of the sample.
5.9.1.2 Appearance and start-up operation are inspected visually.

5.9.1.3 For inspection of the running motor, the vibration rate and speed are measured in

accordance with the method specified in 5.4 and 5.5, respectively.

5.9.1.4 For inspection of the charging function, the charging current is measured by the

following method.
a) For the corded rechargeable toothbrush

The toothbrush is discharged completely. The toothbrush is connected to the charging

connector of the charging device. The charging device is plugged to the supply mains and

charging begins. After 5 min, a reading of the current is taken. The measuring diagram is as

shown in Figure 1a.
b) For the wireless rechargeable toothbrush

The toothbrush is discharged completely. The toothbrush is placed on the charging base of the

charging device. The charging device is plugged to the supply mains and charging begins. After

5 min, a reading of the current is taken. The measuring diagram is as shown in Figure 1b.

---------------------- Page: 12 ----------------------
IEC 63174:2021 © IEC 2021 – 11 –
a) Measurement of charging current for corded rechargeable toothbrush
b) Measurement of charging current for wireless rechargeable toothbrush
Figure 1 – Measurement of charging current for rechargeable toothbrush
5.9.2 Procedures of drop tests

A first drop test (referred to as Drop A) is carried out. The toothbrush is positioned with the

head pointing upward, with the lowest point of the sample 900 mm above a flat and hard rigid

surface made of concrete (see item A of Figure 2). The toothbrush is operated in the no-load

condition on the maximum setting for 30 s, then it is released and allowed to drop to the floor

freely.

Then inspection is carried out in accordance with 5.9.3.1 and 5.9.3.2, and the result is recorded

in the column A1 in the relevant tables in 5.9.3.3 (Table 1 to Table 4).

If the sample is obviously incomplete or cannot operate further following the previous drop, then

the drop test is terminated. If the user-replaceable head is broken, the drop test shall be

continued by replacing the broken head with a new head.

If the sample can still function, a second drop test (referred as Drop B) is carried out. The

sample is positioned with the head pointing downwards, with the lowest point of the sample

900 mm above a flat and hard rigid surface made of concrete (see item B of Figure 2). The

sample is operated in the no-load condition on the maximum setting for 30 s, then it is released

and allowed to drop to the floor freely.

Then inspection is carried out in accordance with 5.9.3.1 and 5.9.3.2, and the result is recorded

in the column B1 in the relevant tables in 5.9.3.3 (Table 1 to Table 4).
---------------------- Page: 13 ----------------------
– 12 – IEC 63174:2021 © IEC 2021

If the sample is obviously incomplete or cannot operate further following the previous drop, then

the drop test is terminated. If the user-replaceable head is broken, the drop test shall be

continued by replacing the broken head with a new head.

If the sample can still function, a third drop (referred as Drop C) is carried out. The sample is

positioned in such a way that the longitudinal axis of the hand-held part, is located horizontally

and the side containing the switches or controls points downwards, with the longitudinal axis

being 900 mm above a flat and hard rigid surface made of concrete (see item C of Figure 2).

The sample is operated in the no-load condition on the maximum setting for 30 s, then it is

released and allowed to drop to the floor freely.

Then inspection is carried out in accordance with 5.9.3.1 and 5.9.3.2, and the result is recorded

in the column C1 in the relevant tables in 5.9.3.3 (Table 1 to Table 4).

If the sample is obviously incomplete or cannot operate further following the previous drop, then

the drop test is terminated. If the user-replaceable head is broken, the drop test shall be

continued by replacing the broken head with a new head.
Dimensions in metres
Figure 2 – Setup for drop tests
The tests are carried out in an environment with no significant air circulation.

The drop test is continued in the order of the above drop A1, drop B1, drop C1, drop A2, drop B2,

drop C2, drop A3 and so on; it is terminated when the sample cannot operate anymore, or when

the established number of cycles is reached. The test is terminated and the cumulative number

of drops is recorded.

NOTE The established number of cycles can be agreed between the manufacturer or the client and the laboratory

before the test.
5.9.3 Inspection and recording after each drop
5.9.3.1 Inspection of appearance

The sample is inspected to check if the enclosure is worn out or if parts are broken off. The

result is recorded.
NOTE Pictures can be used to show the results of the test.
5.9.3.2 Inspection of electrical performance

1) Inspection of start-up: inspection is carried out in accordance with 5.9.1.2. The inspection

results are recorded in Table 2.
-------------------
...

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