BS 7930-1-1998 Specification for eye-protectors for racket sports - Squash《板球运动的护目镜规范 挤压》.pdf

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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7930-1:1998 ICS 13.340

2、.20; 97.220.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Eye-protectors for racket sports Part 1: SquashThis British Standard, having been prepared under the direction of the Health and Environment Sector Board, was published under the authority of the

3、Standards Board and comes into effect on 15 September 1998 BSI 1998 The following BSI references relate to the work on this standard: Committee reference PH/2/9 Draft for comment 98/540099 DC ISBN 0 580 29590 7 BS 7930-1:1998 Amendments issued since publication Amd. No. Date Text affected Committees

4、 responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee PH/2, Eye protection, to Subcommittee PH/2/9, Eye-protectors for leisure activities, upon which the following bodies were represented: Association of Consulting Scientists British Saf

5、ety Industry Federation BSIF Test and Certification Association College of Optometrists Consumer Policy Committee of BSI Electricity Association Federation of Manufacturing Opticians Health and Safety Executive Institution of Mechanical Engineers International Squash Rackets Federation National Phys

6、ical Laboratory Royal College of Ophthalmologists Safety Equipment Association Sports Vision Association Squash Rackets Association Tennis and Rackets AssociationBS 7930-1:1998 BSI 1998 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Terms a

7、nd definitions 1 4 Design and manufacture 1 5 Optical properties of oculars 2 6 Resistance to impact 2 7 Marking 2 8 Information to be supplied by the manufacturer 3 Annex A (normative) Test for resistance to impact 4ii BSI 1998 BS 7930-1:1998 Foreword This part of BS 7930 has been prepared by Subco

8、mmittee PH/2/9, Eye-protectors for leisure activities. This is anticipated to be the first of several parts of BS 7930, each specifying requirements for eye-protectors for one or more racket sports. Research is ongoing into requirements for other sports. Part 1 of BS 7930 is limited to eye protectio

9、n for the sport of squash. The eye-protectors are intended to confer protection when playing squash and are designed to reduce significantly, or to minimize, injury to the eye and the adnexa due to impact. Comfort is a prime consideration if players at every level of play are to be persuaded to wear

10、 eye-protectors. It is important that the eye-protector does not mist or cause problems due to perspiration. It is also important that the eye-protector is held firmly to the face, and does not move during play nor intrude unduly into the field of view. The eye-protector is intended to cause minimum

11、 interference with the players game and is also intended to cause no injury to other players. This standard excludes eye-protectors designed to be worn over other spectacles. It is not possible to judge the safety of such eye-protectors, because during an impact, injury to the eye may be caused by t

12、he underlying spectacles, the quality and style of which may vary, and which may not meet any safety standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a Britis

13、h Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. BSI 1998 1 BS 7930-1:1998 1 Scope This part of BS 7930 specifies design, manufactu

14、re and performance requirements for eye-protectors, for use by players of the game of squash. Requirements for the marking of eye-protectors and for information to be supplied by the manufacturer are also specified. This standard applies only to eye-protectors with polycarbonate oculars. It applies

15、to eye-protectors which incorporate prescription lenses, but not to eye-protectors designed for use over spectacles. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of this British Standard. For dat

16、ed references, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the publication referred to applies. BS 2738-1, Spectacle lenses Part 1: Specification for tolerances on optical properties of mounted spectacle lenses. BS

17、EN 166:1996, Personal eye protection Specifications. BS EN 167:1995, Personal eye protection Optical test methods. BS EN 168:1995, Personal eye protection Non-optical test methods. BS EN 1836:1997, Personal eye protection Sunglasses and sunglare filters for general use. 3 Terms and definitions For t

18、he purposes of this part of BS 7930, the following definitions apply. 3.1 eye-protector any form of protective equipment covering the orbital cavities and margins whilst permitting a defined level of vision 3.2 ocular aperture that part of the eye-protector through which the wearer sees 3.3 lens tra

19、nsparent component filling the ocular aperture for a single eye 3.4 screen transparent component filling the ocular aperture of both eyes together 3.5 ocular lens or screen 3.6 orbital cavities aperture in the skull in which the eyes and their appendages sit 3.7 frame part of the eye-protector to wh

20、ich the oculars are mounted 3.8 field of view binocular field visible to the wearer of an eye-protector (allowing for eye movement) 4 Design and manufacture 4.1 General Eye-protectors shall have no projection or sharp edge which could cause discomfort in wear, or which could cause injury to the wear

21、er or other person should the eye-protector be struck by a squash ball or racket, or if the wearer collides with another player. 4.2 Materials No parts of the eye-protector which are in contact with the wearer shall be made from materials known to be physiologically incompatible or known to create a

22、 significant number of allergic reactions when used as intended by the manufacturer. 4.3 Fit and retention The eye-protector shall fit so as to be firmly retained during play. NOTE 1 Manufacturers may wish to consider providing a range of sizes of eye-protector, in addition to provision for adjustme

23、nt. NOTE 2 Fogging of lenses is a safety problem which may be reduced, for example, by the use of hydrophobic coatings. 4.4 Field of view When tested subjectively with a perimeter, eye-protectors shall allow a minimum overall field of view having the following values: a) 808 temporally; b) 608 infer

24、iorly; c) 408 nasally; and d) 458 superiorly NOTE 1 The peripheral field is not necessarily bounded by the protector frame. NOTE 2 Examples of suitable perimeters include a Goldmann or a Lister perimeter.2 BSI 1998 BS 7930-1:1998 1) D = dioptre. 2) D = prism doptre. 4.5 Resistance to corrosion cause

25、d by perspiration When tested by the method given in BS EN 168:1995, clause 8, the eye-protector shall exhibit no corrosion or change of colour visible to the unaided eye. After testing in accordance with BS EN 168:1995, clause 8, eye-protectors which include hinged components (for example sides) sh

26、all be operated over their full range of normal movement. Following this operation, no damage or degradation shall be visible to the unaided eye. 5 Optical properties of oculars 5.1 Transmittance 5.1.1 Indoor use, and use under artificial light or in low light conditions Irrespective of the number o

27、f its optical elements, the ocular shall transmit not less than 80 % of a beam of light emitted by a gas-filled tungsten filament lamp operating at a colour temperature of 2856 K, measured at the visual centre of the ocular corresponding to a nominal pupillary distance of 64 mm. 5.1.2 Outdoor use in

28、 sunlight The transmittance of oculars shall conform to that specified for filter category 0, 1 or 2 of BS EN 1836:1997, Table 1. 5.2 Inherent defects The ocular shall be free, to within 3 mm of the edge, from inherent defects, such as bubbles, grains, clouding, holes, cracks, waves and dull spots,

29、that are visible to the unaided eye, and visible to the wearer when the eye-protector is worn. 5.3 Tolerances When tested in accordance with BS EN 167:1995, clause 3, oculars of nominal plano power shall have the following tolerances: a) spherical power: 0.12 D 1) , at the visual centre of the ocula

30、r, corresponding to a nominal pupillary distance of 64 mm; b) astigmatic power: 0.12 D, at the visual centre of the ocular, corresponding to a nominal pupillary distance of 64 mm; c) prismatic effect: difference in prismatic power between the visual centres of the oculars, corresponding to a nominal

31、 pupillary distance of 64 mm: base out: 1.00D 2) base in: 0.25D vertical: 0.25D 5.4 Prescription oculars Eye-protectors with prescription oculars shall conform to BS 2738-1. 6 Resistance to impact When tested in accordance with annex A, none of the specimens shall fail in any of the following ways.

32、a) Ocular fracture. An ocular shall be considered to have fractured if it cracks through its entire thickness into two or more pieces or if any material should become detached from the surface away from the one in contact with the squash ball. b) Eye contact. Eye contact shall be considered to have

33、occurred if a mark appears on the white paper inserted between the eye-protector and the head-form. c) Backward displacement of the ocular from the frame. d) Ocular housing or frame failure. An ocular housing or frame shall be considered to have failed if it separates into two or more pieces, or if

34、the squash ball passes through the housing or frame. e) Lateral protection failure. The lateral protection shall be considered to have failed if one or more of the following occurs. It fractures through its entire thickness into two or more separate pieces. One or more particles becomes detached fro

35、m the surface remote from the impact point. It allows the squash ball to penetrate completely. It becomes partially or totally detached from the eye-protector. Its component parts become separated. BSI 1998 3 BS 7930-1:1998 3) Marking BS 7930-1:1998 on or in relation to a product represents a manufa

36、cturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solely the claimants responsibility. Such a declaration is not to be confused with third-party certification of conformity. 7 Mark

37、ing 7.1 Oculars 7.1.1 Oculars, unless moulded integrally with the frame, shall be legibly and permanently marked with the following information: a) the identification mark of the manufacturer; b) the number and date of this standard, i.e. BS 7930-1:1998 3) . 7.1.2 The markings shall be located withi

38、n 5 mm of the edge of the ocular, excluding the chamfer. 7.2 Frames Frames shall be legibly and permanently marked with the following information: a) the identification mark of the manufacturer; b) the number and date of this standard, i.e. BS 7930-1:1998 3) ; c) the model size, if applicable. 8 Inf

39、ormation to be supplied by the manufacturer 8.1 Name and address In addition to the information specified in clause 7, the name and address of the manufacturer and/or his agent shall be provided on the packaging and accompanying documentation. 8.2 Instructions for use 8.2.1 Instructions for use shal

40、l be provided by the manufacturer, giving the following information: a) that the eye-protector is intended to help prevent eye injury during the game of squash and is not designed to protect against head and facial injuries; b) that no eye-protector can protect against all possible impacts; c) an ex

41、planation of the markings specified in clause 7; d) advice on correct fitting and adjustment to ensure firm retention during play; e) advice on care, cleaning and storage; f) a warning that the eye-protector is not to be worn over spectacles. NOTE Items d) and f) should be displayed prominently on t

42、he packaging. 8.2.2 The following warnings shall be displayed prominently on the packaging. a) Any severe blow to the eye-protector, even one which does not cause visible damage, may weaken the eye-protector, which should be replaced. b) If an ocular becomes detached from an eye-protector, the eye-p

43、rotector should be replaced. 8.2.3 A statement indicating the sport for which the eye-protector is intended shall be displayed prominently on the packaging.BS 7930-1:1998 4 BSI 1998 Annex A (normative) Test for resistance to impact A.1 Principle This test is similar to that of BS EN 168:1995, clause

44、 9, except that a squash ball is used as the projectile instead of a steel ball, and that the impact speed used differs from those given in BS EN 166:1996, Table 7. A.2 Apparatus The apparatus shall be in accordance with BS EN 168:1995, 9.1, but the steel ball shall be replaced by a standard yellow-

45、dot squash ball. A.3 Specimens Four new specimens of the eye-protector are required. A.4 Conditioning A.4.1 Eye-protector Place the specimens in a conditioning atmosphere at a temperature of 238C 58C and a relative humidity of 50 % r.h. 7.5 % r.h. for a minimum of 4 h prior to the test. A.4.2 Squash

46、 ball Place a standard yellow-dot squash ball in a conditioning atmosphere at a temperature of 458C 38C and a relative humidity of 10 % r.h. 7.5 % r.h. for a period of 1 h. Remove the ball from the conditioning atmosphere no more than 3 min before commencing the test described in A.5. A.5 Procedure

47、A.5.1 Perform the test in accordance with BS EN 168:1995, 9.2, but use the squash ball as the projectile at a speed of 40 m/s instead of the speeds specified in EN 166:1995, Table 7. Subject the specimens to impacts in accordance with A.5.2 to A.5.5, using a different specimen for each impact. The f

48、our impact points are defined in BS EN 168:1995, 3.2.3 and Figure 11. A.5.2 Impact the first specimen once at the left frontal impact point from the side horizontal direction. A.5.3 Impact the second specimen once at the right frontal impact point from the side horizontal direction. A.5.4 Impact the

49、 third specimen once at the left side impact point from the front horizontal direction. A.5.5 Impact the fourth specimen once at the right side impact point from the front horizontal direction.blankBSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent