ISO 29061-1:2010

INTERNATIONAL ISO
STANDARD 29061-1
First edition
2010-12-15
Road vehicles — Methods and criteria
for usability evaluation of child restraint
systems and their interface with vehicle
anchorage systems —
Part 1:
Vehicles and child restraint systems
equipped with ISOFIX anchorages
and attachments
Véhicules routiers — Méthodes et critères pour l'évaluation de la facilité
d'utilisation des systèmes de retenue pour enfants, et leurs interfaces
avec les systèmes d'ancrage dans le véhicule —
Partie 1: Véhicules et systèmes de retenue pour enfants équipés
d'ancrages et d'attaches ISOFIX

Reference number
©
ISO 2010
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ii © ISO 2010 – All rights reserved

Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 ISOFIX usability evaluation procedure and scoring principles.4
4.1 Evaluation procedure.4
4.2 Scoring system.5
5 Usability evaluation forms.6
Annex A (informative) Recommendations regarding scoring and assessment.19
Annex B (informative) Example usability rating classes .20
Bibliography.21

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
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International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 29061-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 12,
Passive safety crash protection systems.
ISO 29061 consists of the following parts, under the general title Road vehicles — Methods and criteria for
usability evaluation of child restraint systems and their interface with vehicle anchorage systems:
⎯ Part 1: Vehicles and child restraint systems equipped with ISOFIX anchorages and attachments
⎯ Part 2: Manual to assist the usability assessments of ISO 29061-1 (Technical Report)
iv © ISO 2010 – All rights reserved

Introduction
The usability of a child restraint system (CRS) in terms of ease of
⎯ installation of child restraint systems in various vehicles, and
⎯ day-to-day use with a child (securing, harnessing, adaption for a growing child, etc.),
is of utmost importance to ensure that a CRS is used properly in accordance with the manufacturer's
intentions, and to ensure that it will provide maximum protection in a crash situation. An international
agreement on usability criteria and measurements is beneficial for both consumers and manufacturers.
The aim of this part of ISO 29061 is to develop and validate a usability rating system for ISOFIX systems to
promote improved ISOFIX design for easy and correct use. It provides child restraint and vehicle
manufacturers with a tool for the assessment of the usability of new and current ISOFIX systems. At the same
time, it provides consumers (parents and caregivers) with information on the key features related to the proper
use of the ISOFIX system, and assists them in selecting CRS and vehicles with ISOFIX systems that are easy
to use properly.
The rating system consists of an assessment form and a manual (see ISO/TR 29061-2). In the manual, the
content of the assessment form is clarified and guidelines and interpretations are provided. The rating form is
also available in Excel (xls) format for download from the ISO standards maintenance site.
The usability of ISOFIX is addressed both in terms of the CRS (attachment system) and in terms of the vehicle
(anchorage system) as well as the interaction of the two, emerging when child restraint systems are mounted
in cars.
The usability evaluation system in ISO 29061 has been developed with participation from, and based on the
experiences from, usability rating systems from Canada (Transport Canada and ICBC), the USA (NHTSA),
and the EU (NPACS and consumer rating programmes, such as ICRT, ADAC).
It is envisaged that this methodology could be useful for current vehicle rating systems such as US NCAP and
Euro NCAP.
INTERNATIONAL STANDARD ISO 29061-1:2010(E)

Road vehicles — Methods and criteria for usability evaluation
of child restraint systems and their interface with vehicle
anchorage systems —
Part 1:
Vehicles and child restraint systems equipped with ISOFIX
anchorages and attachments
1 Scope
This part of ISO 29061 provides criteria for the judgement of usability of child restraint systems (CRS) with
ISOFIX attachments and their corresponding anchorages in the vehicle.
This part of ISO 29061 provides criteria for a separate evaluation of the child restraint ISOFIX attachments, of
the ISOFIX anchorage installation in the vehicle, and an evaluation of the interface issues when installing a
child restraint system in a certain vehicle.
This part of ISO 29061 covers both rigid and flexible attachment systems of the CRS.
NOTE Although ISOFIX is defined in the original “ISOFIX” standard (ISO 13216-1) to be a rigid system, the term
“ISOFIX” in this part of ISO 29061 is extended to include flexible CRS attachments (LATCH, UAS).
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 13216-1:1999, Road vehicles — Anchorages in vehicles and attachments to anchorages for child
restraint systems -— Part 1: Seat bight anchorages and attachments
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
anchorage
part of the universal interface provided in a vehicle
NOTE See also ISOFIX anchorages and top tether anchorage.
3.2
anti-rotational device
device intended to restrict forward or rearward rotation of a child restraint system (3.6)
3.2.1
primary anti-rotational device
device intended to restrict forward rotation of a child restraint system
EXAMPLE Top tether or support leg.
3.2.2
secondary anti-rotational device
device intended to restrict rearward rotation of a rearward-facing child restraint system
EXAMPLE Rebound bar or rebound tether.
3.3
attachment
part of the universal interface provided with the child restraint system
NOTE See also ISOFIX attachments (3.9.3) and non-rigid (flexible) attachment (3.11).
3.4
audible
capable of being heard in normal environmental conditions
3.5
base
part of the CRS (3.6) equipped with ISOFIX attachments (3.9.3) which can be attached to the ISOFIX
anchorages (3.9.2) separately from the CRS shell
NOTE The CRS shell is attached on the CRS base in the normal use.
3.6
child restraint system
CRS
free-standing device intended to provide child vehicle occupants with an approved restraint
NOTE CRSs comprise various categories such as car beds, infant restraints, toddler seats (forward and rearward-
facing), booster cushions, and booster seats. Combination products may cover two or more of these product categories.
[ISO 13216-1:1999, definition 3.3]
3.7
connector
connecting and locking device to the universal interface, provided with the child restraint system, and part of
the attachment
3.8
hidden slack
unintended looseness of a strap that is likely to adversely affect the performance of the CRS, and that cannot
be easily detected or can only be detected by handling the CRS attachments in a non-standard way
3.9
ISOFIX
system for the connection of CRS to vehicles, which has two rigid anchorages in a vehicle seating position
located near the seat bight, corresponding rigid attachments on the CRS, and a means to limit the pitch
rotation of the CRS
NOTE 1 In this part of ISO 29061, the term ISOFIX is extended to include flexible CRS attachments (LATCH, UAS).
NOTE 2 Adapted from ISO 13216-1:1999.
3.9.1
ISOFIX accessibility tester
device used to check the accessibility of an ISOFIX anchorage
NOTE The dimensions are defined in Figure 3, ISO 13216-1:1999.
2 © ISO 2010 – All rights reserved

3.9.2
ISOFIX anchorages
two horizontal rigid bars, 6 mm in diameter and at least 25 mm long, as specified in ISO 13216-1, installed in
vehicles in or near the seat bight, and to which two ISOFIX attachments are connected to secure the lower
part of the CRS
NOTE Anchorages may be rigid or semi-rigid according to Annex A of ISO 13216-1:1999.
3.9.3
ISOFIX attachments
two hardware assemblies, built into the CRS base at 280 mm apart, that meet the requirements of ISO 13216-1
and are used to connect a CRS to ISOFIX anchorages
NOTE Attachments may be rigid or non-rigid according to Annex B of ISO 13216-1:1999.
3.10
misuse
any deviation from the intended application and use of a CRS that might reduce its protective performance
3.11
non-rigid attachment
flexible attachment
one of two (2) prescribed connections, in accordance with ISO 13216-1:1999, Annex B, flexibly supported
from the child restraint system structure, between a CRS and an anchorage
NOTE 1 A non-rigid (flexible) attachment may consist of a CRS connector or hook supported by webbing or the
equivalent. A CRS connector is an attachment with certain specified dimensions designed to be rigidly supported,
described in ISO 13216-1:1999, Figure 8. When designed according to ISO 13216-1:1999, Annex B, a CRS connector
may be flexibly supported.
NOTE 2 Adapted from ISO 13216-1:1999.
3.12
pictogram
illustration or photo used to represent a concept or an operation
NOTE It may be supplemented by text.
3.13
rebound bar
type of anti-rotational device intended to restrict the rearward rotation of a rearward-facing CRS
NOTE It usually comprises a rigid device that, when in its operational position, rests against the car seatback.
3.14
rebound tether
lower tether
type of anti-rotational device intended to restrict the rearward rotation of a rearward-facing CRS
NOTE It usually comprises a tether strap or other hardware attached near the back or base of the CRS that connects
to a rebound tether (lower tether) anchorage. It incorporates a device to enable it to be connected to such an anchorage.
3.15
rebound tether anchorage
lower tether anchorage
anchorage on the vehicle seat track or on or close to the vehicle floor to which a rebound tether (lower tether)
can be attached
3.16
seat bight
area close to the intersection of the surfaces of the vehicle seat cushion an
...