Composite ball grip for car gearbox lever

Abstract: The ballgrip includes: a cap (1) having a shaped coupling surface (2); a body (3) of a ballgrip (4) which can be mounted onto the gearbox lever (5), having a coupling surface (6) which is shaped complementary to the surface (2) of the cap (1) which is designed to support said coupling surface, thus allowing the body (3) and cap (1) to define together the ballgrip (4); removable joining means (7) of the cap (1) to the body (3) which permit the mounting onto the same body (3) of a plurality of caps (1) including: a guide (9) undirectionally placed between the body (3) and cap (1) so as to allow the relevant tangential sliding of the coupling surfaces (2,6) when assembling the ballgrip (4); a reaction element (10) which can be coupled to the guide (9) so as to prevent the backward sliding of the cap (1) on the body (3) and keep the positioning during use of the gearbox lever (5).

Description: The present invention relates to a composite ballgrip for car gearbox levers. The ballgrip is particularly used in the field of components and accessories for cars; the above mentioned ballgrip has to meet not only functional and ergonomical needs but it has to be up to a reasonable aesthetic standard in such a way as to allow particular personalization and/or enhance prestige of the vehicles. Many prior art ballgrips have the drawback that they are manufactured as a single piece so their substitution implies intervention on the mechanical joint which is normally present between the ballgrip and the gearbox lever. Such operation needs a certain level of professional experience by the person who carries out the substitution (at least regarding safety), a certain amount of time and the suitable equipment and therefore this operation cannot be performed independently and above all quickly by the car driver. For this reason, said substitution turns out to be not only difficult, awkward and expensive to carry out but also penalizing to those who wish to renew the look of the inside of the motor car. A composite ballgrip is known from the patent GB 1527672: there is claimed a knob including a removable upper position, which comprises a peripheral projection complementary to a perpheral recess of the lower portion. However, the junction between the upper and the lower portion may be removed during the march, unless they are sticked. The aim of the present invention, as characterised in the claims, is therefore that to eliminate all the above mentioned drawbacks. The aim of the present invention is attained by means of a composite ballgrip in which there is a cap and a body of the ballgrip, both of which are separate and detachable and are interconnected by removable joining means thus allowing a variation of the overall look of the ballgrip, by substituting manually only the cap, leaving the body of the ballgrip in a stable position on the gearbox lever. The main advantage attained by the present invention is that the join between the ballgrip and the gearbox lever does not have to be touched, thus allowing the car driver to carry out several different variations of the ballgrip manually and rapidly. A further advantage of the present invention is also represented by the endless number of aesthetic variations that are cheap and easy to carry out, since said variations are obtainable by means of a combination, on the same body of the ballgrip, of a plurality of caps in different forms, decorations, colours and/or constructive materials. Further advantages and characteristics of the present invention will better emerge from the detailed description that follows made with reference to the accompanying drawings which represent a preferred embodiment in the form of a non-limiting example wherein: Figure 1 shows a perspective view of the whole ballgrip according to the embodiment of the present invention; Figure 2 shows a view from above of the ballgrip of figure 1 in which several parts have been removed so as to better emphasize others; Figure 3 shows an exploded perspective view of the ballgrip of figure 1; Figure 4 shows a section of the ballgrip taken along the section line IV-IV of figure 3; Figure 5 shows a partially sectioned and exploded perspective view of a variation of the embodiment of the ballgrip of figure 1; Figure 6 shows on a larger scale a part of the joining of the cap to the body of the ballgrip according to the present invention; With reference to figure 1, enclosed herewith, it can be seen that the present invention consists substantially of a composite ballgrip (4) for the gearbox lever of a motor car, substantially composed of a cap (1) which is preferably made of polyurethan, said ballgrip being covered with a coat of decorating material, and of an underlying body (3) of the ballgrip (4), which body is made of plastics or different material, said components being manufactured as separate, detachable parts which are reciprocally connected by removable interposed joining means (7). The body (3) of the ballgrip (4) is supported by the gearbox lever (5), to which the ballgrip (4) is mechanically interconnected, and is fitted with (figures 2, 3) a shaped coupling surface (6), with a preferably curvilinear generatrix (which could also be rectilinear), which is able to support the cap (1), at a complementary coupling surface (2) geometrically similar and located on the latter (figure 3). The overall dimensions of the cap (1) are less than those of the body (3) of the ballgrip (4). The cap (1) and the body (3) of the ballgrip (4) are shaped in such a way that the coupling surfaces (2, 6) are inclined with respect to directions (Y) along which operate the driving forces which are applied onto the gearbox lever (5) during the use of said gearbox lever (5). In particular the range of such inclination and orientation of the coupling surfaces (2, 6) are correlated to a direction of movement (Z) of the vehicle in such a way that the driving forces onto the gearbox lever (5), in both pulling and pushing directions, can only be applied to the body (3) of the ballgrip (4); whereas when the driving forces are applied directly onto the cap (1), they can only be applied in pulling or pushing directions. Removable joining means (7) preferably include (figures 2, 4) a guide (9) with a unidirectional swallowtail formed by a groove (15), obtained in the body (3) of the ballgrip (4), and a sliding block (16) which is supported by the cap (1); said parts are reciprocally coupled for reciprocal tangential sliding of the coupling surfaces (2, 6), of the cap (1) and the body (3) for the assembling of the ballgrip (4). A reaction element (10) can be fixed to the guide (9); said element is preferably made up of an elastic ring surrounding the guide (9) for preventing the spontaneous reverse movement of the cap (1) with respect to the body (3) after the fitting of the ballgrip (4). As the guide (9), in correspondence with the groove (15), has a stop element (17) (with a rounded end) for the sliding of the cap (1) with respect to the body (3), the elastic ring-shaped reaction element (10) constantly keeps the cap (1) pressed down against the body (3) contrasting said stop element (17). The orientation of the guide (9) and in particular the orientation of its stop element (17) are correlated with the direction of movement (Z) so that the stop element (17) contrasts the unidirectional action possibly carried out by the driver onto the cap (1), thus enabling said cap to transfer the actions previously received to the body (3) of the ballgrip (4). As clearly shown in figures 1, 2, 4, 5 the ballgrip (4) shows on its periphery a seat (18) for the housing of the elastic ring obtained between the body (3) and the cap (1). The seat (18) has a curvilinear shape, which is similar to the generatrix development (8) of the coupling surfaces (2, 6) between the cap (1) and the body (3). Apart from offering a good aesthetic characterisation to the ballgrip (4) with (figure 1) or without (figure 5) the elastic ring, said curvilinear shape allows the ballgrip to apply advantageously a reciprocal forcing of the sliding block (16) and of the groove (15) which, by causing an increase in the friction during the sliding of the guide (9), further contributes to keeping the cap (1) fixed on the body (3) of the ballgrip (4) during the use of the ballgrip itself. As mentioned above, the ballgrip (4) engages mechanically to the gearbox lever (5). This is possible because the joining means (7) include (figure 5) a tubular end (13) externally threaded, supported by the body (3) of the ballgrip (4), which tubular end (13), after being coupled to one end (20) of the gearbox lever (5) by means of an axial coupling movement, is then secured to said end (20) by means of a dowel (19); the assembling is then completed by a threaded metal ring (14) coaxially mobile to the gearbox lever which in turn engages onto the tubular end (13). In a different embodiment of the present invention, (figure 5) the removable joining means (7) also include a cavity (11), which is obtained by the crossing over of the body (3) of the ballgrip (4), and a coupling element (12), whose shape is geometrically complementary to the shape of the cavity (11), supported by the cap (1). The coupling element (12) can be inserted into the cavity (11) starting from an initial disengaged position of the cap (1) from the body (3) of the ballgrip (4) to a final position of complete insertion in which the coupling surfaces (2, 6) reciprocally match. In said final position the tubular end (13), which in this case is supported directly by the coupling element (12), comes out of the cavity (11) of the body (3) from an opposite part with respect to the cap (1) and can be engaged to the gearbox lever (5) in the same way as mentioned above. In order to prevent the cap (1) from rotating about the axis (5a) of the gearbox lever (5) and taking an undesired position with respect to the body (3), the coupling element (12) and the cavity (11), in which said element is housed, can take, in general, a plurality of shapes, which are different from their cross sections: elliptical, polygonal but not circular or, however, said element and cavity can be fitted with other equivalent anti-rotation means. A further variation (figure 6) of the preferred embodiment, which can substitute the elastic ring embodiment of the reaction element (10), is offered by the possibility of creating projections (21) and recesses (22), complementary and elastically yielding upon manual forcing when mounting the cap (1) on the body (3), on the sliding block (16) and on the groove (15) of the guide (9), on condition that the material constituting the cap (1) or the body (3) of the ballgrip (4) makes it possible. The effect obtained by said projections (21) and recesses (22) can be achieved in more or less the same way by carrying out the groove (15) and the sliding block (16) in such a way that they can reciprocally, dimensionally interfere, forcing each other in a direction (X), which is transversal to the guide (9), when the sliding block (16) comes close to the stop element (17).

Claims: Composite ballgrip for gearbox lever, comprising: at least one cap (1) having coupling surfaces (2), a body (3) of the ballgrip (4) which can be mounted onto said gearbox lever (5) and bearing its own coupling surface (6) corresponding to the coupling surface (2) of the cap (1) to which it can be matched in such a way as to be able to support the cap (1) allowing said body (3) together with said cap (1) to constitute said composite ballgrip (4); stable joining means (7) of said cap (1) which are removable from said body (3) of the ballgrip (4) for the mounting, onto said body (3), of a plurality of different caps (1) placed one as an alternative to the other, characterised in that said coupling surfaces (2,6) are inclined with respect to one direction (Y) along which operates the driving force of the gearbox lever (5). Ballgrip as in claim 1, characterised in that said coupling surfaces (2,6) of the cap (1) and the body (3) of the ballgrip (4) have curvilinear generatrixes (8). Ballgrip as in claim 1, characterised in that said coupling surfaces (2,6) of the cap (1) and the body (3) of the ballgrip (4) have rectilinear generatrixes (8). Ballgrip as in claim 1, characterised in that said cap (1) has overall dimensions which are not higher than the overall dimensions of the body (3) of said ballgrip (4). Ballgrip as in claim 1, characterised in that said cap (1) has overall dimensions which are not higher than the overall dimensions of the body (3) of the ballgrip (4), and coupling surfaces (2) which can be matched to the corresponding coupling surface (6) of the body (3) which are inclined with respect to one direction (Y) along which operates the driving force of the gearbox lever (5) in such a way that said driving force can be applied directly onto the body (3) of the ballgrip (4) in both directions. Ballgrip as in claim 1 characterised in that the said cap (1) has a coupling surface (2) which is inclined with respect to one direction (Y) along which operates the driving force of the gearbox lever (5) in such a way that said force is applied onto said cap (1) in only one direction. Ballgrip according to claim 1, characterized in that the said removable joining means (7) include: a guide (9) interposed between said body (3) and said cap (1) so as to permit their relevant running tangentially to said coupling surfaces (2,6) in the assembling phase of said ballgrip (4); a reaction element (10) coupled with said guide (9) in such a way as to oppose to the backward running of the cap (1) onto the body (3) ensuring its reciprocal stable positioning during the use of the said gearbox lever (5). Ballgrip as in claim 1, characterised in that said joining means (7) include a cavity (11) obtained in the crossing of the said body (3) of the ballgrip (4) and a coupling element (12) supported by the said cap (1) which can be inserted into said cavity (11) starting from an initial disengaged position of the cap (1) from the body (3) of the ballgrip (4) to a position of contact of said coupling surfaces (2, 6), said coupling element (12) being provided with a tubular end (13) coming out of the cavity (11) of the body (3) in said second final position which end can be coupled with said gearbox lever (5), said removable joining means (7) include also a metal ring (14) which engages onto the tubular end (13) in such a way as to reciprocally lock the cap (1) and the coupling element (12) contrasting said coupling surfaces (2, 6). Ballgrip as in claim 8, characterised in that said guide (9) includes a groove (15) and a sliding block (16) supported by said body (3) and said cap (1). Ballgrip as in claim 8, characterised in that the said reaction element (10) is constituted by an elastic ring which encircles the said guide (9). Ballgrip as in claim 8, characterised in that the said reaction element (10) includes complementary projections (21) and recesses (22) obtained on the said guide (9). Ballgrip as in claim 9, characterised in that the said cavity (11) and said coupling element (12) are complementary shaped so as to avoid the relevant rotation movement about the axis (5a) of the gearbox lever (5) of the cap (1) with respect to the body (3). Ballgrip as in claim 9, characterised in that said tubular end (13) and said metal ring (14) are reciprocally threaded. Ballgrip as in claim 10, characterised in that the said groove (15) is unidirectional and equipped with a stop element (17) of the relevant running of said cap (1) with respect to the body (3) of the ballgrip (4). Ballgrip as in claim 10, characterised in that the said groove (15) and said sliding block (16) are shaped as a swallowtail. Ballgrip as in claim 11, characterised in that said body (3) and said cap (1) define, in a reciprocal combination, a seat (18) for housing said reaction element (10) being shaped as an elastic ring. Ballgrip as in claim 12, characterised in that said complementary projections (21) and recesses (22) obtained on said guide (9) are elastically yielding in a direction (X) which is transversal to the running direction of said guide (9).

Inventors: CUMALI VINCENZO, CUMALI, VINCENZO
Applicants: STUDIO FUTURO SRL, STUDIO FUTURO S.R.L.
Application year: 1995
Main classification: G05G1
IPC codes: G05G1