| Spectacles for a helmet and helmet fitted with said spectacles -> Monitor Keywords |
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Spectacles for a helmet and helmet fitted with said spectaclesRelated Patent Categories: Apparel, Guard Or Protector, For Wearer's Head, Aviator`s Helmet, Having Eye Shield (e.g., Goggles, Visor, Etc.)Spectacles for a helmet and helmet fitted with said spectacles description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060185051, Spectacles for a helmet and helmet fitted with said spectacles. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The present invention relates to spectacles to be attached to a helmet and to a helmet fitted with such spectacles. [0002] The technical field of the invention is that of the manufacturing of spectacles. [0003] The invention in particular is applied to helmets of drivers or passengers of fast transportation vehicles, such as motorcyclists' helmets. Such helmets generally include an external stiff cap, an internal cap (or small cap) covering a substantial portion or the totality of the internal face of the external cap, as well as a lining covering the internal face of the internal cap; the latter is thicker and stiffer than the external cap, and is generally moulded in a plastic such as expanded polystyrene. [0004] In this type of helmets, protection of the eyes of the wearer of the helmet against wind, dust or insects notably, is generally provided by a transparent plastic screen which is attached to the external cap so as to be able to switch from a retracted configuration to an active configuration; this switching is generally obtained by rotating the screen, by means of the presence of two substantially diametrically opposite pivots which provide the link between the cap and the screen. [0005] This type of stiff screen, which retracts against the internal face or against the external face of the cap, in the active position (eye protection), extends over several centimetres, in front of the eyes of the wearer of the helmet; in this position, wind and dust may notably rush into the free space separating the screen from the face of the wearer; the screen therefore only imperfectly fulfils its eye protection function, especially when the helmet lacks any chin strap joining the cheeks of the cap. [0006] In Patent EP15796, a ski helmet with a retractable screen, was described, wherein the screen has a lower cut intended to rest on the nose of the wearer; the screen is joined to a jointed hoop at the cap, by an elastic tab which urges the screen towards the inside of the helmet; the hoop forms a half circle with a radius less than that of the external cap; it slides inside a space delimited by the respective front (frontal) portions of the external and internal caps; the hoop is extended by two levers jutting out from the lower edge of the cap; the helmet further includes two ramps for guiding the side edges of the screen which are formed in the front portion of the internal cap. [0007] In such a helmet, the presence of a front hollow space separating the external cap from the internal cap reduces the shock absorption capacity by the front portion of the helmet; moreover, the presence of protruding side levers under the cheeks of the helmet, which are required for causing the pivoting of the hoop bearing the screen, may cause discomfort for the user. [0008] The elastic joining tab of the screen to the hoop has a limited capacity of adaptation to different configurations of faces of users, likely to be encountered; consequently, in any case, with this pad, the edges of the screen cannot be pressed around the eyes of the wearer of the helmet. [0009] Given the fact that adapting this screen support system to "small heads" requires lengthening the elastic tab, the length of the recess for retracting the screen is increased all the more, to the detriment of the performances of the helmet, in terms of shock resistance. [0010] The presence of guiding ramps requires the manufacture of a specially dimensioned helmet for a screen with given dimensions, or conversely, the manufacture of a screen specially designed for a determined helmet model and size. [0011] Moreover a miner helmet was described in the same patent, wherein the screen similarly is retractable, but at the outside of the helmet; the screen may slide on the external face of the cap, guided by external pins fixed on the cap; the levers are replaced with a maneuvering button located at the top of the hoop; this system is not adapted to sports helmets--in particular motorcyclist helmets--which are subject to substantial aerodynamically constraints. [0012] Document FR-A-2717046 describes another device for retracting a visor inside a helmet. [0013] An object of the invention is to propose retractable spectacles for helmets and helmets with spectacles, which are improved. [0014] An object of the invention is to find a remedy, at least in part, to the drawbacks of the known systems for attaching and/or adapting spectacles or retractable screen(s) to a helmet. [0015] According to a first aspect of the invention, a device for attaching spectacles to a helmet with two branches each fitted with a means--such as a pivot--for attachment to the helmet, is provided wherein each branch is deformable and/or jointed, and includes means for bringing the spectacles back towards the means for attachment to the helmet, so that the amplitude of the back movement of the spectacles towards the inside of the helmet may be large and may thus be adapted to very varied face configurations of the wearer. [0016] By means of the invention, the support of spectacles essentially formed by both (left and right) pivoting branches is compact and may easily be designed so as to exhibit with the spectacles which it supports a low aerodynamic drag coefficient; thus, this support is preferably designed in order to slide (during its pivoting) on the external face of the external cap of the helmet. [0017] Further, the forces for bringing the spectacles back towards the face of the wearer, which are distributed and/or applied on either side of the spectacles, promote intimate contact of the spectacles with the portions of the face surrounding the eyes of the helmet's wearer. [0018] In order to provide a large elastic (reversible) deformation amplitude of the branches of the device, each of the return means has an elastic deformation capacity over a large amplitude (or travel) (in particular over an amplitude at least equal to 10 mm); in particular, each return means preferably includes a spiral metal spring. [0019] Still preferably, each of the branches is telescopic, i.e., it includes two branch portions which may slide by remaining nested in each other, for example one around the other, which portions are jointed and brought back toward each other by said spring or return means. [0020] According to another aspect of the invention, a device for attaching spectacles to a helmet by two branches pivotally: mounted relatively to the helmet and joined to the eye screen(s) by a deformable link, in which each branch includes pressing means for pressing (and/or applying) a portion of the branch adjacent to the eye screen(s), against a portion of the section of a cheek of the cap (and/or the helmet); these means facilitate application of the spectacles against the face of the wearer. [0021] In addition, for this purpose, each of the branch portions is preferably joined to the screen side edge by a deformable link, in particular by a joint including a pivot, a hinge or a ball joint. [0022] According to a preferred embodiment, these pressing means cooperate with return means; for this purpose, each of the branches preferably includes a first joint joining said telescopic portion of the branch (which is fitted with a pivot for attachment to the cap) to said branch portion adjacent to the screen; still preferably, each branch includes: [0023] a first branch elongated portion, a first end of which is firmly attached to a screen side edge via a first hinge, and a second end of which has a first bevelled sliding supporting face, [0024] a second branch elongated portion, a first end of which is firmly attached to the second end of the first branch elongated portion via a second hinge, [0025] a third branch elongated portion, a first end of which slidably receives a second end at least of the second branch elongated portion, which has a second bevelled sliding supporting face provided for cooperating with the first bevelled sliding supporting face, which is pivotally mounted relatively to the helmet and which includes said return means. [0026] According to another aspect of the invention, spectacles to be attached on a helmet by two branches are proposed, including two screens or screen portions or monocular ophthalmic lenses which are joined by a hasp including a lower cut, in which the hasp is provided with a means (such as a pivot or a hinge with a substantially vertical axis) for mutual pivoting of both screens or both screen portions; this allows the face including both screens or screen portions to assume a first configuration in which the relative inclination of the screens or lenses is adapted to the morphology of the face of the wearer, as well as a second configuration in which the relative inclination of the screens or lenses is adapted to the curvature of the external face of the external cap; with this, the spectacles may be intimately pressed against the face in the active position, and they may be pressed against the cap in the retracted position. [0027] According to another aspect of the invention, spectacles to be attached onto a helmet, are provided, including a binocular screen or two binocular screens and a mounting for joining the screen(s) to the helmet; the spectacles include two branches which are each fitted with a pivot for attaching to the helmet; each branch includes a deformable structure preferably including two mobile portions relatively to each other and a return spring which tends to fold, bend and/or shorten each branch, in order to press the screen(s) against the face of the helmet's wearer. Continue reading about Spectacles for a helmet and helmet fitted with said spectacles... 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