Tiêu chuẩn iso 11334 4 1999

A Reference number ISO 11334 4 1999(E) INTERNATIONAL STANDARD ISO 11334 4 First edition 1999 02 01 Walking aids manipulated by one arm — Requirements and test methods — Part 4 Walking sticks with thre[.]

A Reference number

INTERNATIONAL

STANDARD

ISO 11334-4

First edition1999-02-01

Walking aids manipulated by one arm — Requirements and test methods —

Part 4:

Walking sticks with three or more legs

Aides à la marche manipulées avec un bras — Exigences et méthodesd'essai —

Partie 4: Cannes de marche avec au moins trois jambes ou plus

© ISO 1999

All rights reserved Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic

or mechanical, including photocopying and microfilm, without permission in writing from the publisher.

International Organization for Standardization

Case postale 56 • CH-1211 Genève 20 • Switzerland

Internet iso@iso.ch

Printed in Switzerland

1 Scope 1

2 Normative references 1

3 Terms and definitions 1

4 Requirements 9

5 Test methods 10

6 Marking and labelling 14

7 Test report 15

Annex A (informative) Recommendations 16

© ISO ISO 11334-4:1999(E)

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISOmember bodies) The work of preparing International Standards is normally carried out through ISO technicalcommittees Each member body interested in a subject for which a technical committee has been established hasthe right to be represented on that committee International organizations, governmental and non-governmental, inliaison with ISO, also take part in the work ISO collaborates closely with the International ElectrotechnicalCommission (IEC) on all matters of electrotechnical standardization

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3

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.International Standard ISO 11334-4 was prepared by Technical Committee ISO/TC 173, Technical systems andaids for disabled or handicapped persons

ISO 11334 consists of the following parts, under the general title Walking aids manipulated by one arm —Requirements and test methods:

 Part 1: Elbow crutches

 Part 4: Walking sticks with three or more legs

Annex A of this part of ISO 11334 is for information only

INTERNATIONAL STANDARD © ISO ISO 11334-4:1999(E)

Walking aids manipulated by one arm — Requirements and test methods —

Part 4:

Walking sticks with three or more legs

1 Scope

This part of ISO 11334 specifies requirements and methods of testing the stability, static load capacity and fatigue

of walking sticks with three or more legs and fully equipped with handle and tips It also gives the requirementsrelating to safety, ergonomics, performance, marking and labelling

The requirements and tests are based on everyday usage of walking sticks with three or more legs, manufacturedfor a user weight (mass) of not less than 35 kg

This part of ISO 11334 is not applicable to walking sticks with three or more legs with underarm or forearm support

NOTE Recommendations further to the requirements are given in annex A

ISO 9999:1998, Technical aids for disabled persons — Classification

ISO 10993-1, Biological evaluation of medical devices — Part 1: Evaluation and testing

3 Terms and definitions

For the purposes of this part of ISO 11334, the following terms and definitions apply (see also Figures 1 to 7)

3.1

walking stick with three or more legs

walking stick with three or more legs and a handle, but without an underarm or forearm support

NOTE 1 Classification No 12 03 16 in accordance with ISO 9999:1998

NOTE 2 Throughout this document the term walking stick refers to a walking stick with three or more legs

See Figures 5, 6 and 7.

NOTE Walking sticks are grouped in six sizes, as given in Table A.1

3.8

walking-stick depth

maximum outside dimension of a walking stick measured horizontally in the direction of movement

See Figures 5, 6 and 7

body mass of the person using the product as a technical aid

NOTE Standard user weight is 100 kg for adults and 35 kg for children

© ISO ISO 11334-4:1999(E)

9 Height-adjusting and locking device

Figure 1 — Example of a walking stick with three legs

8 Height-adjusting and locking device

Figure 2 — Example of a walking stick with four legs

© ISO ISO 11334-4:1999(E)

9 Height-adjusting and locking device

Figure 3 — Example of a walking stick with five legs

© ISO ISO 11334-4:1999(E)

© ISO ISO 11334-4:1999(E)

The handgrip width shall be not less than 25 mm and not more than 50 mm

NOTE This requirement does not apply to anatomic handgrips

The handgrip shall be replaceable or easy to clean

4.2 Leg section and tips

The leg section shall end in tips of a design which will prevent the legs from piercing through it when testedaccording to 5.6 and 5.7

That part of the tip in contact with the walking surface shall have a minimum diameter of 35 mm.

4.3 Adjusting devices

The means of height adjustment shall not work loose when the walking stick is in use

The height adjustment mechanism shall be clearly marked with its maximum extension as specified by themanufacturer

The telescoping members shall exhibit an easy running fit

Minimum vertical clearance at the centre of the base, with the height adjustment at its minimum, shall be 120 mm

4.4 Materials

Structural load-carrying members moulded from plastic materials should be produced from virgin materials Ifrecycled materials are included, the components shall retain equivalent strength throughout the life of the walkingstick

Taking into account the intended use and contact by those involved in user care or transportation and storage of theproduct, materials which come into contact with the human body shall be assessed for biocompatibility using theguidance given in ISO 10993-1

When tested according to the inwards stability test (5.3), the angle of the plane when the walking stick is at the point

of tilting shall be not less than 2°

When tested according to the outwards stability test (5.4), the angle of the plane when a walking stick with threelegs is at the point of tilting shall be not less than 5°; when testing a walking stick with four or more legs, this angleshall be not less than 7,5°

4.7 Mechanical strength and durability

When tested according to the separation test (5.5), the upper and lower parts of the walking stick shall not comeapart

When tested according to the static loading test (5.6), the walking stick shall not be damaged to a degree which willrender it unsafe in use No part of the walking stick shall crack or break

When tested according to the fatigue test (5.7), the walking stick shall not be damaged to a degree which will render

it unsafe in use No part of the walking stick shall crack or break

5 Test methods

5.1 Testing environment

All tests, unless otherwise stated, shall be performed at an ambient temperature of 21 °C ± 5 °C

© ISO ISO 11334-4:1999(E)

All tests, unless otherwise specified, shall be performed with the walking stick adjusted to its maximum height asspecified by the manufacturer

Position the height adjustment as specified in 5.1 Apply a static force of 250 N ± 2 % Tilt the plane in the directionshown in Figure 8 and record the maximum angle of the plane reached when the walking stick is at the point oftilting, rounded downwards to the nearest 0,1°

5.4 Outwards stability tests

Repeat this procedure for all outwards directions as indicated in Figure 9

5.5 Separation test

5.5.1 General

This test is applicable to walking sticks which are joined together by two or more parts only when the joint is not part

of the height-adjustment mechanism

© ISO ISO 11334-4:1999(E)

Key

1 Tripod

3 Five-point walker

4 Centreline of the hinges

Figure 9 — Outwards stability tests

5.6 Static loading test

5.6.1 Loading geometry

Apply the loading force vertically to the midpoint of the handgrip Position the height adjustment as specified in 5.1

5.6.4 Procedure

Apply the loading force gradually over a minimum period of 5 s up to maximum force Maintain this maximum forcefor a minimum of 10 s Inspect the walking stick for cracks or breaks Note visual cracks, breaks and any unsafecondition of the walking stick

5.7.4 Loading frequency

The frequency of the cyclic loading shall not exceed 1 Hz

5.7.5 Loading cycles

The number of cycles shall be 200 000

6 Marking and labelling

Each walking stick shall be clearly and indelibly marked with the following:

a) maximum user weight;

b) manufacturer's name or other means of identification;

c) manufacturer's model identification name and/or number;

d) month and year of manufacture;

e) maximum extension of the height adjustment, marked on one of the adjusting members

© ISO ISO 11334-4:1999(E)

7 Test report

The test report shall contain the following information:

a) name and address of the manufacturer;

b) name and address of the supplier submitting the product for test;

c) name and address of the testing institution;

d) ISO classification number and type (see ISO 9999);

e) maximum user weight;

f) manufacturer's product type and model identification name and/or number;

g) supplier's product type and model identification name and/or number;

h) a photograph of the walking stick;

i) month and year when the test was performed;

j) whether or not the product complies with the requirements of this part of ISO 11334

A.2.1 Mechanical durability

When tested in accordance with 5.5 or 5.6, a walking stick should not show any deformation resulting in apermanent set which could impair the use of the walking stick or adjusting mechanism(s)

A.2.2 Handle and handgrip

The handle may be adjustable but should be securely fixed when in use

The shape and/or the material of the handgrip should prevent the hand from sliding when gripping

The handgrip length should be not less than the minimum handgrip length given in Table A.1

NOTE This recommendation does not apply to curved or anatomic handgrips

The material of the handgrip should be nonabsorbent

A.2.3 Leg section and tip

The tip should be pliable, hard-wearing and have a high coefficient of friction against the walking surface

The tips shall be replaceable but should be secure when fitted

The tip tread against the walking surface should be such that any “suction cup” effect is avoided

A.2.4 Adjusting and locking devices

It should be possible to operate the adjustment and folding devices without the use of tools

A.2.5 Materials and finish

The walking stick should not rattle when in use

A.3 Marking and labelling

Each walking stick should, in addition to the requirements given in this part of ISO 11334, be marked with thefollowing:

a) the size of the walking stick, in accordance with Table A.1

© ISO ISO 11334-4:1999(E)

Table A.1 Walking stick size

(related to max walking stick

NOTE This table refers to Figures 5, 6 and 7 A walking stick may encompass more than one size

b) the supplier's name;

c) the supplier's model identification name and/or number

A.4 Test report

The test report should, in addition to the requirements given in this part of ISO 11334, contain an annex with thefollowing information:

a) inspection report as specified in 5.2;

b) results of test described in 5.3;

c) results of test described in 5.4;

d) results of test described in 5.5;

e) results of test described in 5.6;

f) results of test described in 5.7;

g) maximum walking stick height;

h) minimum walking stick height;

i) maximum walking stick depth;

j) maximum walking stick width;

k) handgrip width;

l) handgrip length;

m) mass of the walking stick;

n) whether or not tools are necessary to operate the means of adjustment;

o) any other relevant information

ICS 11.180

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