GB/T 44083.3-2024 English PDF (GBT44083.3-2024)

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GB/T 44083.3-2024: Road vehicles - Methods and rules for the evaluation of the usability of child restraint systems and their compatibility with vehicle anchorages - Part 3: Securing and daily maintenance of child occupants in child restraint systems
GB/T 44083.3-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
CCS T 26
Road vehicles - Method and rules for the evaluation of the
usability of child restraint systems and their compatibility
with vehicle anchorages - Part 3: Securing and daily
maintenance of child occupants in child restraint systems
(ISO 29061-4:2017, Road vehicles - Methods and criteria for usability evaluation of
child restraint systems and their interface with vehicle anchorage systems - Part 4:
Securing of child in child restraint system and daily handling aspects, MOD)
ISSUED ON: MAY 28, 2024
IMPLEMENTED ON: DECEMBER 01, 2024
Issued by: State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 7
4 Evaluation procedures and scoring rules ... 9
5 Usability evaluation form ... 10
Appendix A (Informative) Recommended use of the evaluation system ... 17
Appendix B (Informative) Examples of usability evaluation ... 18
References ... 19
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
This document is Part 3 of GB/T 44083 "Road vehicles - Method and rules for the
evaluation of the usability of child restraint systems and their compatibility with vehicle
anchorages". GB/T 44083 has published the following parts:
- Part 2: Child restraint systems using vehicle belts;
- Part 3: Securing and daily maintenance of child occupants in child restraint systems;
- Part 4: Booster seat and booster cushion.
This document modifies and adopts ISO 29061-4:2017 "Road vehicles - Methods and
criteria for usability evaluation of child restraint systems and their interface with vehicle
anchorage systems - Part 4: Securing of child in child restraint system and daily
handling aspects".
Compared with ISO 29061-4:2017, this document has made the following structural
adjustments:
- RE-ARRANGE the order of terms in Chapter 3, according to the logical
relationship and order of appearance;
- RE-NUMBER the serial numbers of the tables, merging the Tables 1.1 ~ Table 1.2
and Tables 2.1 in ISO 29061-4:2017 into Table 1 and Table 2, respectively.
The technical differences and reasons between this document and ISO 29061-4:2017
are as follows:
- ADD the normative reference GB 27887 (see Chapter 3), as the source of some
child restraint system related terms;
- USE the normative reference GB/T 44083.2 to replace ISO 29061-3 (see 4.1.1), to
adapt to China’s technical conditions and improve operability;
- Some terms and definitions adopt the relevant descriptions in GB 27887 (see 3.1,
3.2, 3.4, 3.5.2), which are consistent with relevant national standards and easy to
understand;
- ADD the terms and definitions of 3.2 about children's harness belts, to facilitate the
understanding and use of other terms.
The following editorial changes have been made to this document:
Road vehicles - Method and rules for the evaluation of the
usability of child restraint systems and their compatibility
with vehicle anchorages - Part 3: Securing and daily
maintenance of child occupants in child restraint systems
1 Scope
This document specifies the usability evaluation requirements for child occupants in
child restraint systems, as well as the daily maintenance of child restraint systems.
This document applies to the usability evaluation of integrated child restraint systems
installed with ISOFIX or vehicle seat belts.
2 Normative references
The contents of the following documents constitute essential clauses of this document
through normative references in the text. Among them, for dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB 27887 Child restraint systems for power-driven vehicles
GB/T 44083.2 Road vehicles - Methods and rules for the evaluation of the usability
of child restraint systems and their compatibility with vehicle anchorages - Part 2:
Child restraint systems using vehicle belts (ISO 29061-3:2017, MOD)
ISO 29061-1 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
3 Terms and definitions
The terms and definitions defined in GB 27887, as well as the following terms and
definitions, apply to this document.
3.1
- Child restraint system instruction manual, including instructional videos;
- Instrument for measuring seat belt tension;
- Child dummies specified in GB 27887, which may also be replaced by suitable
children.
4.1.6 The initial state of the child restraint system being evaluated shall be consistent
with the state when the consumer obtains it. The evaluation process includes all steps
from assembling the child restraint system to installing it in the vehicle. It is best to be
conducted by persons who are not familiar with this child restraint system and vehicle.
The evaluation process does not include the process of unpacking the child restraint
system, taking it out of the packaging box and plastic protective cover, taking out the
instruction manual; however, other preparation processes of the child restraint system
before use need to be considered and evaluated in the evaluation form.
4.1.7 The use mode of the child restraint system and the installation location in the
vehicle shall be determined in advance and recorded in the evaluation form.
4.1.8 First evaluate the labeling and instruction manual; finally evaluate the
convenience of child occupant in the child restraint system on the vehicle seat.
4.2 Scoring rules
4.2.1 The scoring rules consist of the evaluation results and weighting coefficients of
each evaluation item. All evaluators give a unified evaluation result for each evaluation
item, the evaluation results are divided into good, medium, poor, with corresponding
scores of 3, 1, 0, respectively. The weighting coefficients are divided into A, B, C, with
corresponding scores of 3, 2, 1, respectively. The score obtained by multiplying the
above two scores is the score of the evaluation item. For example: if the evaluation
result is "good" and the weighting coefficient is "A", the score of this item is the highest
score, that is, 9 points.
4.2.2 The final evaluation result is expressed as a score rate, which is determined by the
ratio of the actual score value to the highest score value that can be obtained. For details,
see Appendix A. The final evaluation results can be graded with reference to Appendix
B.
Note: The highest score values that can be obtained for different products may be different.
5 Usability evaluation form
The usability evaluation form for the riding and daily maintenance of child occupants
in child restraint systems includes three parts: the evaluation of the child restraint
system itself, the evaluation of the riding of child occupants in the child restraint system,
the comprehensive evaluation. Among them, the evaluation form for the child restraint