SUN VISOR FOR MOTOR VEHICLES

Abstract: Said sun visor is comprised of a single piece enveloping body (E) of plastic material, preferably polyethylene, shaped by a fixing process which configures the enveloping body (E), and an outer covering (RE) preferably made of vinyl polychloride, which acts as a sheath, thus providing the sun visor with its external finish. The fixing spring (R) is provided inside the enveloping body (E) and its position is set by depressions provided on the front and rear sides of the enveloping body (E). The internal volume of the enveloping body (E) is filled (RR) with plastic materials, preferably polyolefins such as polyethylene, polypropylene or a mixture of both, which are constitutive of the structural reinforcement of the enveloping body (E). Application to the car industry.

Description: Field of the Invention The object of the present invention is a sunvisor for automobiles and, particularly, a sunvisor structured on an integral plastics material casing. Background of the Invention Embodiments of automobile sunvisors comprising a structure based on a plastics material casing formed by blow moulding of these materials are known. These sunvisors have a contour adapted to the configuration of the vehicle passenger compartment in each case and may comprise the so-called vanity mirror, normally arranged in the passenger side sunvisor, and which is generally simply superimposed on the surface of said sunvisor or mounted in the body thereof according to the appropriate techniques for each case. Generally speaking, sunvisors comprise a retaining spring which is generally formed from high spring steel and may be attached to the corresponding pivot pin of the bent support attached to the automobile structure. With this coupling, the sunvisor may rotate about itself and about the bent support and occupy, among the positions of regular use, any position defined by the user. The retaining spring grips the pivot pin so as to ensure, under normal conditions of use, that the sunvisor position selected by the user position is not modified by the vibrations caused by the vehicle running. In the majority of known embodiments, the said retaining spring and bent support pivot pin are provided, also, with means for holding the sunvisor in at least one position, generally the rest position, with greater force. Sunvisors are also normally known to comprise a hanging bridge which is arranged at the opposite end to the one occupied by the retaining spring. This hanging bridge may be coupled to a support provided for the purpose on the automobile structure for providing the sunvisor with an auxiliary point of support, once the hanging bridge is hooked onto the support, to prevent mechanical overloads which the coupling of the sunvisor to the bent support would otherwise have to withstand. In general, the known embodiments of sunvisors comprising a casing formed by blow moulding of plastics materials have the drawback, derived from the very nature of the said casing, of a limited mechanical strength, whereby, under normal conditions of use, they are easily deformable. A further drawback is that the retaining spring and/or the hanging bridge require to be incorporated in the sunvisor after the casing thereof has been formed, involving the need of using additional assembly members and operations. The above drawbacks have a notable effect with regard, on the one hand, to the operative reliability of these sunvisors, particularly since the large number of components thereof imply a greater number of faults and/or breakages and, on the other hand, to the incorporation of the retaining spring and/or hanging bridge, during the corresponding assembly stages, to the sunvisor casing, which makes the production process and, therefore, the finished product, notably more expensive. It is already known from DE-A-3 704 751 to provide a sunvisor for automobiles which comprises an essentially prismatic one-piece casing of variable contour depending on the needs arising from the internal configuration of the vehicle passenger compartment, which casing is made from plastics materials, with a retaining spring, made preferably from high spring steel and defining a housing firmly retaining a pivot pin of a bent support attached to the automobile structure so that said retaining spring may snugly rotate about said pin, said retaining spring being one-piece is arranged in the interior of the casing, totally covered thereby and said pivot pin having corresponding mechanical means and being accessible from the outside of the casing through a single orifice formed therein through which it may snugly slide for coupling with the retaining spring of the bent portion allowing the rest position of the sunvisor to be set, wherein the inner volume of the casing with the exception of the space occupied by the retaining spring is completely full of plastics materials, preferably polyolefins, such as polythene, polypropylene or a mixture of both and also polyurethanes, forming the structural reinforcement of the casing and wherein the retaining spring is held firmly in position by retaining means formed in the casing itself. Another sunvisor for automobiles is also known from DE-A-2 811 429. This preknown sunvisor does not have a retaining spring defining a housing firmly retaining a pivot pin of a bent support attached to the automobile structure so that said retaining spring may snugly rotate about said pin, wherein said pivot pin has corresponding mechanical means allowing the rest position of the sunvisor to be set. This preknown sunvisor has no retaining means formed on the casing and consisting of a plurality of recesses which on the front and rear faces thereof set the position occupied by the retaining spring. Yet another sunvisor for automobiles is known from the DE-OS-1 958 831. The sunvisor described in this document comprises a casing made by a blow process, and a retaining spring holding a pivot pin attached to the automobile structure. The retaining spring is held in position by either circular through holes or elongated ribs, through which corresponding protrusions in the sunvisor casing extend. In view of the above discussed prior art, it is the object of the present invention to provide a sunvisor having a high operative reliability and low production costs. This object is solved by a sunvisor in accordance with claim 1. The features of the automobile sunvisor of the invention described above solve the drawbacks of the known sunvisor embodiments structured on a casing blow-moulded from plastics materials. The fact that the casing is shaped around the retaining spring in such a way that the casing itself sets the position occupied by the retaining spring therein consequently eliminates any subsequent operation and/or additional element for fixing the spring to the casing as happens with the known embodiments, all of which notably reduces the production costs. The fact that the casing of the sunvisor of the invention is also formed with the hanging bridge which may engage the support attached to the vehicle structure also represents a notable reduction of the production costs since, in a similar way to as described in the foregoing paragraph, it does away with the need to incorporate said hanging bridge or any other additional assembly member in the sunvisor. The fact that the casing of the sunvisor for automobiles of the invention is filled with plastics materials - as it is also the case for the sunvisor disclosed in DE-A-3 704 751 - confers a very high mechanical strength on the sunvisor and, under normal conditions of use, prevents deformation and/or breakage thereof for mechanical overloads. The recyclable nature of the polythene, the polypropylene or mixture of both used for making the casing, and the filling of the latter, of the sunvisor of the invention, prevents the sunvisor from contributing, as industrial refuse, to the degradation of the environment, at the end of the useful life thereof. Furthermore, the said materials forming the casing, and the filling thereof, may optionally be subjected to a recycling process allowing the recovery of said materials and subsequent industrial application with the consequent reduction of costs as far as raw materials are concerned. Brief Description of the Drawing The sunvisor for automobiles of the invention is illustrated in the sheets of drawings accompanying this specification. In said drawings: Figure 1 is a part front view of the sunvisor of the invention and the coupling thereof to a bent support. Figure 2 is a cross-section view on the line II-II of Figure 1. Figure 3 is a cross-section view on the line III-III of Figure 1. Figure 4 is a part front view of the hanging bridge of the sunvisor of the invention. Figure 5 is a part front view of another embodiment of the sunvisor of the invention and the coupling thereof to a bent support. Figure 6 is a cross-section view on the line VI-VI of Figure 5. Figure 7 is a perspective view of the retaining spring of the sunvisor of the invention. Figure 8 is a perspective view of another embodiment of the retaining spring of the sunvisor of the invention. Detailed Description of the Embodiment The sunvisor for automobiles of the invention described as an embodiment comprises, as shown in Figures 1 to 4, the casing E , the hanging bridge P , the filling RR , the retaining spring R and the outer covering RE . Figures 1, 2, 3 and 4 show one embodiment of the casing E , said embodiment corresponding to those cases in which the sunvisor of the invention does not incorporate a vanity mirror. Figures 4, 5 and 6 show another embodiment of the casing E wherein said embodiment corresponds to those cases in which the sunvisor of the invention may incorporate a trough containing a vanity mirror and other items for increasing the functionality of the said mirror. Figures 7 and 8 show two embodiments of the retaining spring R . Both embodiments have the same functionality and are given as an example among other possible forms that said retaining spring R may adopt depending on the needs of each particular application. Both embodiments of the casing E and of the retaining spring R of the sunvisor of the invention comprise equivalent members which, with a view to achieving greater clarity of disclosure, will use as identification, both in this description and in the drawing sheets, the same reference symbol, with the members corresponding to the embodiment of the casing E shown in Figures 5 and 6 and to the retaining spring R shown in Figure 8 being differentiated with the prime (') notation. Figures 1 and 2 show how the casing E is essentially prismatic and is provided with a contour, given as an example, appropriate to the internal configuration of the vehicle passenger compartment. The casing E is made preferably from polythene and is formed by a blow-moulding process. The casing E , on both the front and the back side and all along the length thereof is formed with an internal thickening 1 which, with reference to the position of said casing E given in Figure 1, progressively expands from the lower edge to reach a maximum thickness at the top edge thereof, as shown in Figures 2 and 3. The thickening 1 acts as a structural reinforcement and helps to increase the mechanical strength of the casing E by avoiding, to the corresponding extent, the resilient deformation thereof under normal conditions of use. Figures 1 and 2 show how the retaining spring R is located inside the casing E and is suitably arranged relative to the bent support 2 which, as said above, is attached to the structure of the automobile. In order to obtain greater clarity of disclosure, the sunvisor of the invention is not coupled, by the pivot pin 3 to the bent support 2. As said above, the casing E is formed by blow moulding of polythene. This forming is effected about the retaining spring R , i.e., said retaining spring R is inserted in the blow mould prior to forming the casing E . Figure 7 shows how the retaining spring R is symmetrical about the longitudinal centre plane thereof and is formed by a sheet of highly resilient material, preferably steel which, essentially, is formed by a lower prismatic portion 4 and by an upper semicylindrical portion 5. The prismatic portion 4 of the retaining spring R is provided with a pressure slot 6 extending co-extensive with said spring R . By resilient deformation, said pressure slot 6 allows the surfaces of the retaining spring R in contact with the inner surface of the casing E to grip said surface so that they help to fix the position of the retaining spring R in the casing E , as shown in Figure 2. The semicylindrical portion 5 of the retaining spring R , which receives the pivot pin 3 of the bent support 2, is formed internally and longitudinally with two mutually opposite positioning flats 7, dimensioned in functional correspondence with the positioning flats 8 formed on said pivot pin 3, as shown in Figures 1 and 7. The retaining spring R shown in Figure 8 is formed, in a similar way to the embodiment of said spring R illustrated in Figure 7, with a lower prismatic portion 4' , provided with a pressure slot 6' and an upper semicylindrical portion 5' which is provided internally and longitudinally with facing positioning flats 7' . To aid in setting the position of the retaining spring R inside the casing E , the embodiment of retaining spring R shown in Figure 8 is provided with through holes 9, the number and arrangement of which, illustrated in said Figure 8 as a guidance, will depend on the specific needs of each particular application. The purpose of the said through holes 9 is to receive, during the moulding stage of the casing E , part of the material forming the casing E so that, in this way once the casing E is formed, the said material may aid to fix the position of the retaining spring R . As shown in Figure 1, the casing E is formed on both the front and rear sides with the retaining recesses 10 which hold the retaining spring R of the embodiment illustrated in Figure 7. In this way, the recesses 10 prevent the retaining spring R from changing position within the casing E . With a view to increasing the resistance of the casing E to deformation, it is provided with the filling RR formed, as said above, preferably by polyolefins such as polythene, polypropylene or a mixture of both or by polyurethanes, with the filling RR fully occupying the inner volume of the casing E except for the volume determined by the retaining spring R , as shown in Figure 2. Figure 4 shows how, suitably arranged at the end occupied by the retaining spring R , the casing E is formed with the hanging bridge P which is defined by the cut-away portion 11 and by the through hole 12 formed in said casing E . The corresponding bearing support, which is attached to the vehicle structure and which, for greater clarity of disclosure, has not been shown in the drawing sheets, may slide through said opening 12. In this way the hanging bridge P may engage said bearing support at will and rotate therearound. Figures 4, 5 and 6 illustrate the embodiment of the sunvisor of the invention when, as said before, it may comprise a trough for containing a vanity mirror and the complementary elements thereto. Figure 6 shows how the casing E is formed internally thereof with the structural reinforcement thickening 1' and externally, as shown in Figure 5, with the retaining recesses 10' setting the position of the retaining spring R . Suitably disposed on the front face thereof, the casing E is provided with the recess 13 defining a prismatic housing where the said trough containing a mirror surface may be located and affixed. The same as for the embodiment of the sunvisor of the invention illustrated in Figures 1, 2, 3 and 4, the casing E is provided with the filling RR formed by the aforesaid members, i.e. polyolefins such as polythene, polypropylene or a mixture of both or polyurethanes. In the embodiments of the sunvisor of the invention shown in Figures 1, 2, 3 and 4 and in Figures 4, 5 and 6, the casing E is provided all over with the external covering RE formed preferably from polyvinyl chloride or textile materials. This covering RE , which in essence forms a sheath, provides the sunvisor with a surface finish in keeping with the interior finish of the vehicle passenger compartment. In both embodiments described of the sunvisor of the invention, the pivot pin 3 of the bent support 2 may be snugly inserted in the semicylindrical portion 5 or 5' of the retaining spring R through the opening formed for that purpose in the casing E , so that said retaining spring R and, consequently, the casing E to which it is firmly attached, may rotate about the pivot pin 3. Under normal conditions of use, the retaining spring R uniformly and constantly grips the pivot pin 3 so that, to obtain rotation of the sunvisor about the said pivot pin to situate it in the position of use selected by the user, it is necessary to apply a moment in excess of the grip of the retaining spring R , which action is adequate to set the said position of use and prevent untimely movement of the sunvisor as a result of vibration caused by the normal running of the vehicle. Furthermore, the joint action of the positioning flats 7 or 7' and 8 which, respectively, are formed on the retaining spring R and on the pivot pin 3 of the bent support 2 fixes and more firmly ensures the contemplated rest position of the sunvisor of the invention.

Claims: A sun visor for automobiles, comprising a. an essentially prismatic one-piece casing (E) of variable contour depending on the needs arising from the internal configuration of the vehicle passenger compartment, the casing (E) being made from a plastics material, preferably polythene, by a blow process; b. a one-piece retaining spring (R) made preferably from a high spring steel, being arranged in the interior of the casing (E), totally covered thereby, and defining a housing (5-5') firmly retaining a pivot pin (3) of a bent support (2) attached to the automobile structure, so that said retaining spring (R) may snugly rotate about said pin (3), said pivot pin (3) having corresponding mechanical means (8) and being accessible from the outside of the casing (E) through a single orifice formed therein through which it may snugly slide, for coupling with the retaining spring (R), the bent portion allowing the rest position of the sun visor to be set; wherein c. the retaining spring (R) is firmly held in position by the casing (E) being shaped around said retaining spring (R), and by retaining means formed in the casing (E) itself, said retaining means consisting of a plurality of recesses (10-10') being provided on the front and rear faces of said casing (E) at positions below and at the sides of said retaining spring (R), thereby setting the position occupied by the retaining spring (R); d. the casing (E) is formed, close to the end opposite the position occupied by the retaining spring (R), with a through aperture (12) defining a hanging bridge (P) which may be engaged and snugly rotatably coupled to a support attached to the vehicle structure; and e. the inner volume of the casing (E) with the exception of the space occupied by the retaining spring (R) is completely full of plastics materials (RR), preferably polyolefins such as polythene, polypropylene, or a mixture of both and also polyurethanes, forming the structural reinforcement of the casing (E).

Inventors: AYMERICH MUNOZ JOSE, PRAT CASTAN JESUS, AYMERICH MUNOZ, JOSE, PRAT CASTAN, JESUS, AYMERICH MUNOZ, José, PRAT CASTAN, Jesús
Applicants: FICO ITM SA, FICO I.T.M., S.A.
Application year: 1992
Main classification: B60J3
IPC codes: B60J3