Patent Application
20050168855
This invention refers to an assembly for carrying out the hinged connection of an outer rear mirror of a vehicle and namely an elastic member acting on said assembly.
The invention is useful in the field of the car industry.
Cars have usually at least a rear view mirror located outside on one side of the vehicle to allow the driver to see backwards, a lane of the road adjacent to the lane along which the vehicle is been travelling. This kind of mirror comprises a reflecting element or mirror proper, mounted on a frame which is in turn connected to a base fixed on the side of the vehicle. In operation, the mirror frame takes a stationery position with respect to the base and hand or power-driven means allow the user to chose the orientation of the reflecting element with respect to the mirror frame to adjust the visual angle thereof. The mirror frame, in operation, is placed on the side of the vehicle crosswise this later and this situation has the drawback, namely, when manoeuvring in narrow passageways or when the vehicle is parked, that the mirror frame can easily knock down an object, a person or a vehicle or be knocked down by them, which can carry the rear view mirror breakage and/or damage to other vehicles and/or injuries to a pedestrian.
To overcome this drawback, a hinged connection is known of the rear view mirror frame having the base fixed outside the vehicle, offering at least two stable positions for the frame: a position in operating condition in which the frame is placed crosswise on the side of the vehicle; and a parking position in which the frame is bent backwards against the side of the vehicle so that the frame is slightly or even not at all protruding and the reflecting element remains in the front on the side of the vehicle and protected. Passing from a position to the other is carried out by hand overcoming the force of an elastic member. Usually, the frame can also turn once for safety purpose folding in the opposite direction overcoming said elastic force which has the effect of giving away when turning when any contact occurs before breaking or causing damages to persons or objects. The rotation in that parking position has also said safety function when the contact occurs in the opposite direction.
EP-A-0807551 discloses an outer rear mirror of a car equipped with a hinged connection assembly comprising a swivel pin coaxially inserted though a holed element, such as a ring, connected to a frame of said rear view mirror, said swivel pin having at a first end a flange and at a second end at least a retaining configuration adapted for fixing to a corresponding retaining configuration of a base connected to the vehicle. Between said flange and a support of said ring there is an elastic member which acts by compression in a direction parallel to said swivel pin axis to secure a contact under pressure between a lower part of the ring and a seat of said base, with the possibility of turning within an angle limited by respective stops. At said lower part of the ring and at the seat of said base complementary slots and tongues are located, having tilted edges which can be nested to provide the stable positions disclosed below. When, with the hand, the frame is forced to turn said tilted edges slide axially moving the ring against the force of the elastic spring until the tongues of one of them lift and slide on the tongues of the other allowing it to turn while being folded.
The elastic member used in that patent is a conventional compression helical spring made of a spring steel generally including an anti-rust surface treatment. The production of said spring is relatively expensive and due to its helical shape, its handling is discomforting which makes the assembly mounting operations difficult.
An object of this invention is to offer an assembly for the hinged connection of the rear view mirror provided with an elastic member which can be produced at a very low cost.
Another object of this invention is to provide an assembly for the hinged connection of a rear view mirror provided with an elastic member which can be easily and effectively used to facilitate mooting the assembly.
Said aims are achieved according to this invention, providing an assembly for the hinged connection of an outer rear view mirror on the side of a vehicle of the kind disclosed in above-mentioned patent.
The assembly according to this invention is characterized in that the elastic member comprises a hollow cylinder of moulded plastic material provided with at least one opening having the suitable configuration to give to the hollow cylinder said compression elastic property significantly in a direction parallel to the swivel pin axis. Said elastic hollow cylinder is arranged coaxially to the swivel pin as a skirt, from a peripheral edge of the flange existing on a first end of the swivel pin towards the second end thereof where it meets said ring support. As used in this description the term “ring” intends to comprise any strip of material arranged around a hole and it can appear for example under the configuration of a plate connected to the frame and in which a hole has been pierced or an internal flange has being arranged at the lower end of a sleeve connected to the frame.
Said opening of the cylindrical body can be a single one, having an helical shape, so that it defines within the hollow cylinder a top ring and a lower ring connected to each other by at least an helical strip although it is preferred that the hollow cylinder comprises two or more helical openings and defining there a top ring and a lower ring connected to each other by as many helical strips. In another even more preferred embodiment, the helical strips left within the hollow cylinder have opposite helix directions and are crossing each other integrating each other in crossing areas, It is achieved defining a plurality of openings having a substantially rhombic shape distributed in a staggered arrangement throughout the hollow cylinder wall. Said configuration in helical strips having opposite helix direction and integral crossing areas provide more force and are evenly distributed.
According to a first example of embodiment, said elastic skirt-shaped hollow cylinder is independent from the swivel pin, therefore this later can be of any suitable material. According to a second example of embodiment, the swivel pin is hollow, of same moulded plastic material as the hollow cylinder and said skirt-shaped hollow cylinder is integral with the swivel pin, said top ring of the skirt being preferably built in said peripheral edge of the flange.
The plastic material out of which the elastic hollow cylinder is made, and eventually the swivel pin is a High Tech plastic material having the characteristics of elasticity and strength required and it can be injection moulded. In the second example of embodiment, in which the elastic hollow cylinder is integral with the swivel pin, a compound will be chosen for said plastic material which possesses a low coefficient of friction with the material of the ring because there will exist a relative sliding motion with the material of the ring because there will exist a sliding relative motion between a end of the hollow elastic cylinder and the support of the ring.
The fact that the elastic member of the assembly of the invention is obtained by plastic material injection moulding allows that it is produced at low cost. Said elastic configuration of the hollow cylinder based on rhombic openings evenly arranged allows that it is more easily handled because they do not tend to entwist their spires with that of other elastic elements stored together that conventional helical springs have. In addition, the fact that the elastic member is integral with the swivel pin reduces the number of components to be produced, checked, stored and assembled which in turn cut downs the final cost of the assembly.
Said advantages and characteristics will be more apparent in the detailed description below of preferred examples of embodiment with reference to the drawings attached in which:
In the figures same numerals have been used for analogous elements.
Referring first to
At said lower part 23 of the ring 20 and in said seat 32 of the base 31, respective complementary slots 24 and tongues 33 are located which can be nested to provide stable positions above disclosed. Said slots 24 and tongues 33 have respective tilted side edges 25 and 34 which when the rotation of the frame 21 with respect to the base 31 is forced by hand, slide ones on the others moving the ring 20 axially against the force of the spring 50 until the lower part 23 of the ring 20 lifts and slides on the tongues 33 and the base 31 allowing folding rotations disclosed with respect to the state of the art.
The device of this invention is of the kind disclosed above and it is characterized in that the helical spring 50 in steel is replaced by an elastic member 5 the characteristics of which are disclosed below.
Referring now to
In the example shown, two helical strips 7 exist having an helix direction and two other helical strips 7 having the opposite helix direction.
Said configuration of rhombic openings 6, helical strips 7 having opposite helix direction and integral crossing areas 10 provide a sufficient elastic force having a reduced hollow cylinder wall thickness, the force is evenly distributed and the spires have no longer the trend to become entwisted and tangled with those of the adjacent elastic elements during their storage and handling. However, other configurations are possible (not shown). For example, a single opening, having an helical development which leaves within the hollow cylinder a top ring and a lower ring connected to each other by a single helical strip; or two or more openings having an helical development which leaves within the hollow cylinder as many other parallel helical strips connecting the top ring to the lower ring. Although the top and lower rings are useful, in some cases they are not essential, for example in the case where several helical strips integrally crossed exist. Although there would exist several parallel helical strips, they could be connected to each other by some sporadic intermediate connection suppressing one or the two rings.
The fact of offering the elastic element of injection moulded plastic material has the advantage of cutting down its production cost and to allow a configuration is drawn which makes its handling easier.
The fact of providing the elastic element and the swivel pin integrated in a single piece of injection moulded plastic material has the additional advantage to reduce the number of parts making the assembly production, checking, storage and assembly easier which cuts down the final cost.
The swivel pin 1 as well in the first example of embodiment shown in
While the swivel pin 1 of the first example of embodiment shown in
In the two examples of embodiment of this invention, the group formed by the elastic element 5 and the swivel pin 1 is built in the assembly for the hinged connection of a rear view mirror in a way very well-known within the sector and shown in
Above examples of embodiment and shown in the figures must be understood as illustrative and not limitative of the field of the invention, which is defined in claims appended.
