SWITCH DEVICE AND SWITCH CONTROL FOR VEHICLES FITTED WITH SUCH A DEVICE

Abstract: The switch device (7) according to the present invention consists of a frame (15) closed by a pair of facing printed circuits (20, 25), the said frame housing a rotary rocker arm (18), a slide (16) having a control rod (8) projecting from the said frame, and transmission means (37, 61) for alternatively turning the said rocker arm (18), the latter having sliding contacts (19) cooperating with the tracks on at least one of the said printed circuits (20), between different angular po­ sitions whenever the said slide (16) is moved towards the said rocker arm (18); the switch control (1) according to the present invention presents a box (2) for housing the said switch (7), a control lever (5) connected to the said rod (8) through a hole (10), and a shoulder ring (12) fitted on to the said rod (8) through a hole (13) on the said box (2).

Description: SWITCH DEVICE AND SWITCH CONTROL FOR VEHICLES FITTED WITH SUCH A DEVICE The present invention relates to a switch device, in par ticular, for a vehicle switch control, designed in such a manner as to be operated by one of the control levers on the said switch control, for switching from town to road lights or vice versa, and possibly also for control ling emergency flashing of the road lights. The present invention also relates to a switch control for vehicles fitted uith the aforementioned switch device, the said control being designed in such a manner as to enable it to be fitted with the said switch device in essentially automatic manner. switching from town to road lights on a vehicle is known to be performed usually by changing the angular position of a control lever forming part of the switch control on the vehicle and usually projecting radially from the steering column. Emergency flashing of the road lights is also known to be performed by the driver pulling the aforementioned lever up into an unstable control position from which it returns automatically when released. As the Highway Code demands road lights over a given speed, and that the same be ds-pped on encountering on caning vehicles, drivers are obviously forced to switch continually from one to the other, particularly vhen driving along main roads at night. In addition to being awkward and/or annoying, such continual operation of the control lever entails a fairly vide movement on the part of the driver which also distracts his/her attention from the road. For this reason, contrary to the Highvay Code, many drivers often dispense with road lights, making almost permanent use of town lights, and only occasionally operating the emergency flashing control along dark stretches of road and/or round bends, the lever on the said flashing control being uch easier to operate in that it nay be pulled up without abandoning the steer ing wheel and without distracting the driver's attention from the road. Furthermore, once released, the said lever returns automatically to its original position where it nay easily be located by touch whenever required. The aim of the present invention is to provide a switch device, particularly for a switch control on a vehicle, which, in addition to being cheap, highly reliable and easy to assemble, may be connected to a normal switch control lever for enabling operation of the said lever for switching from, toun to road lights or vice versa in the same manner as currently employed for emergency flashing of the road lights. A further aim of the present invention is to provide a switch device of the aforementioned type designed also to enable emergency flashing of the road lights, i.e. designed to enable the said lever on the switch control to perform both the aforementioned functions. Finally, a further aim of the present invention is to provide a switch control designed to be assembled automatically with the said switch device. With these aims in view, the present invention relates to a switch device, particularly for a vehicle switch control, characterised by the fact that it comprises a loadcbearing frame at least partially closed by a respec tive printed circuit having respective conducting tracks; a rocker arm housed in idle manner inside the said frame and fitted, facing the said printed circuit, with a respective sliding blade contact designed to cooperate with the said conducting tracks; a slide housed in axially-sliding manner inside the said frame and having activating means projecting from the same; retaining means for selectively setting the said rocker arm in two different angular positions in which different conducting tracks on the said printed circuit are engaged by the said sliding contact; and transmission means for selectively and alternatively displacing the said rocker arm from one to the other of the said two angular positions following displacement of the said slide towards the said rocker arm The present invention also relates to a switch control comprising a switch device of the aforementioned type for switching from town to road lights and vice versa and for emergency flashing of the road lights, the said control also comprising a box for housing the said switch device and a lever fitted on to the said box; character¯ ised by the fact that the said lever is provided with a through hole inside which is secured, by means of a shoulder ring, the said switch device control rod, and by the fact that the supporting box is provided with a further hole coaxial with the said control rod and great er in diameter than the said shoulder ring, for enabling assembly of the latter on to the said control rod. A non-limiting arrangement of the present invention will now be described with reference to the attached drawings in which c Fight shows a partial view of a switch control according to the present invention; - Fig.2 shows an enlarged longitudinal section of a switch device according to the present invention; - Figs 3 and 4 shoB sections along lines III-III and IV-IV respectively in Fig.2; - Fig.s 5, 6, 7, 8 and 9 shou respective details on the Fig.2 switch device. Number 1 in Fig.1 indicates a switch control for any known type of vehicle (not shown), the said control com prising a box or supporting member 2 inside which is hinged a control lever 5, e.g. by means of pin 3 fitted in idle manner with bushing 4. As control 1 may be of any known type, it is shown only schematically and in part, and the following description limited to what is already known. According to the present state of the art, lever 5 is hinged on to bushing 4 so as to turn in relation to the latter round an axis perpendicular to that of pin 3, the axis of the latter being essentially paral lel to that of the steering column to/in which control 1 is fitted and/or housed. When control 1 is assembled, lever 5 therefore projects radially in relation to the said steering column on the vehicle, thus enabling it to be turned, in known manner, by the user into differ rent angular positions, and also, in known manner, to be pulled by the user, in the direction of the arrow in Fig.1, from the rest position shown by the continuous black line in Fig.1 into the operating position shown by the dotted line in Fig.1, the said operating position being unstable in that, in such a position, lever 5 is opposed by appropriate knorn contrasting means (not shown). Control 1 according to the present invention differs from similar known types of controls in that box or supporting member 2 is provided with a housing 6 for a switch 7 shaped essentially like a parallelepiped box and having an axially-sliding control rod 8 and electrical connectors 9 designed to fit into further electrical connectors (not shown) of known type inside box 2, so as to connect switch 7 to the electrical system on the vehicle of which control 1 forms part. Rod 8 is of such a length as to engage a through hole 10 formed through lever 5 which is reached by rod 8 passing through box 2 and bushing 4 through respective coaxial holes 11 formed coaxially with pin 3 and rod 8 itself. The latter is secured to lever 5 by means of a shoulder ring 12 fitted on to rod 8 itself and larger in diameter than hole 10. According to the present invention, the said ring 12 may be fitted on to rod 8, with switch 7 already housed inside box 2 and lever 5 already assembled and engaged by rod 8, by means of an assembly hole 13 Eormed through box 2 next to pin 3, co- axial with the latter and larger in diameter than ring 12. Hole 13, which after assembly may be closed by any known type of plug (not shown), is of such a size as to enable insertion, as far as rod 8, of a known type of tool designed to hold ring 12 and press it on to rod 8. In the case of a switch control 1 of the type described in Italian Patent Application no 67441-A/84, filed on 2 May, 1984 by the present Applicant and entitled "Multiple-setting control for vehicle indicating and/or operating devices", the content of which is incorporated herein purely for reference purposes, hole 13 clearly provides for automatic assembly of switch 7. To do so, box 2 is first set up on. an appropriately-equipped refe rence table, after which, switch 7, already pre-assembled in a separate assembly station, is inserted, by known handling means, inside housing 6, after first pre-assembling bushing 4 and lever 5 and positioning the connect ors to be mated with connectors 9 in such a manner that the latter are engaged simultaneously when switch 7 is inserted inside housing 6. Having done so, lock ring 12 is then inserted through hole 13 on to rod 8. Clearly, when lever 5 is moved in the direction of the arrow into the position shown by the dotted line, rod 8 will also be displaced with it, thus activating switch 7. According to the present invention, the latter is connected by connectors 9 to the town and road light control circuits on the vehicle in such a manner that partial displacement of lever 5, and consequently relatively limited displace ment of rod 8, causes the road lights to come on for emergency flashing, and in such a manner that setting lever 5 as shown by the dotted line in Fig.1 results in a switch from town to road lights or vice versa. In other words, partial pull-up of lever 5 causes the road lights to flash, whereas total pull-up, as far as the limit stop position of lever 5, causes the torn lights to switch to road lights or vice versa, depending on which is already on when the lever is operated. When released, lever 5 returns to the position shown by the con tinuous black line in Fig.1 r until operated again. As showy in Fig.s 2, 3 and 4, switch 7 according to the present invention comprises a frame 15, preferably made of plastic and essentially rectangular in shape; a slide 16 housed in axially-sliding manner inside frame 15 and having activating means projecting from frame 15 and con sistine of control rod 8; a rocker arm 18 mounted in idle manner inside frame 15 and fitted angularly integral with a respective sliding blade contact 19; and at least one essentially-rectangular printed circuit 20 fitted with at least one of connectors 9 and arranged against face 21 on frame ? 5 so as to close the latter and face sliding blade contact 19, the latter being designed to cooperate with respective circular conducting tracks 22 (Fig.9) on the said printed circuit 20. Frame 15 is preferably provided with a supporting and shoulder base 23 designed to enable locking of frame 15 inside housing 6 and support of printed circuit 20. On the opposite side to that closed by printed circuit 20, frame 15 is also closed by a further printed circuit 25 arranged against face 26 on frame 15, opposite face 21, and also supported by base 23. printed circuits 20 and 25 are secured integral with frame 15 by respective rivets 27 and are preferably provided with respective holes 28, the latter being arranged facing and coaxial with each other and engaged in idle manner by respective connecting pins 29 on rocker arm 18 which is thus supported in idle manner by printed circuits 20 and 25 inside the casing defined by the said printed circuits 20 and 25 and by frame 15. On the opposite side to base 23 frame 75 is provided with an opening 30 en abling exit of rod 8 which is preferably formed integral with slide 16, the latter being located inside frame 15, next to opening 30, and having, according to the present invention, an inner through opening 31 housing, at least partly, rocker arm 18 so as to reduce the size of switch 7. As shown in more detail in Fig.s 5 and 6, slide 16 ist shaped like a small, essenvially-rectangular frame secured in sliding manner inside guides 32 (Fig.3) farmed inside frame 15 and housing flexible contrasting means consisting of helical springs 33 designed to impede travel of slide 16 towards rocker arm 18. Rod 8 is arranged with its axis parallel to that of guides 32 on frame 151 the said guides 32 being engaged by respective projecting side tabs 34 on the frame forming slide 16. A crosspiece 35 on the latter, located on the opposite side to rod b and projecting in relation to the plane in which the rest of slide 16 lies, is provided, according to the present Invention, with an essentially-fork-shaped flexi ble centre projection 35a for receiving, in idle manner, an end fork 36 on transmission lever 37 carried on latter to turn freely on projection 35a. The said retain ing means comprise a ball 48, housed radially inside rock er arm 18, and a contrast spring 49 for ball 48, the said spring 49 being designed to push the said ball 48 out of housing 44 and so cause it to engage, in reversible manner, a pair of cutouts 50 (Fig.4) angularly offset in relation to the rotation axis of rocker arm 18 and formed inside frame 15, the latter being shaped internally round drum 42 in such a manner as to form cylindrical cavity 51. Drum 42 and housing 44, both integral with crank arm 43, are arranged facing slide 16 and housed between the latter an printed circuit 20 in such a manner as to be coplanar with crosspiece 35 and lever 37, the ends 36 and 38 of the said lever 37 engaging both slide 16 and rocker arm 180 on fork end 36, lever 37 is provided with a projection 60 facing printed circuit 25 and, therefore, essentially coplanar with crank arm 43 and slide 16 inside opening 31 on the latter and essentially on a level with cross < -iecç 35. According to the present invention, projection 60 is engaged by a torsion spring 61 also es essentially ork-shaped and secured to pin 62 on crank arm 43. Next to pin 62, the said crank arm 43 is provided with a shoulder block 63 for spring 61, the said block 63 being designed to limit rotation of spring 61 on pin 62 and so displace spring 61 in angularly integral manner with crank arm 43 subsequent to rotation of drum 42; end 38 or, lever 37 being designed to cooperate with the said drum 42 subse#uent to displacement of slide 16 towards drum 42 in such a manner as to turn the entire rocker arm 16. slide 16 and designed to turn rocker arm 18, as described later, following displacement of slide 16 towards the said w ker arm 18. According to the present invention, slide 16 is also provided with supporting pins 38 for a sliding-blade contact 39 located on the opposite side to contact 19 and designed to cooperate in sliding tanner with conducting tracks 40 (Fig.8), on printed circuit 25, located opposite and facing printed circuit 20. Connectors 9 are preferably forced integral with printed circuits to and 25 and, according to the present invention, provide for connecting tracks Q, the latter being shorter than printed circuit 25, to the circuit controlling emergency flashing of the road lights, and for connecting tracks 22, located round hole 28, to the parking light supply circuit on the vehicle and to the two circuits powering the road and townç hts respectively. As shown in Fig.7, rocker arm 18 comprises, according to the present invention, a rotary drum 42 fitted uith sliding contact 19 and pins 29; a crank arm 43 forme integral with drum 42 and located inside opening 31 in the same plane as slide 16 and projecting in relation to drum 42; and a radial housing 44 for retaining means designed to set rocker arm 18 selectively in two different angular positions in which contact 19 engages different conducting tracks 22 on printed circuit 20. According to the pre sent invention, drum 42 is provided with an inner cavity 45t designed to house loosely end 38 opposite end 36 on lever 37, and vith a circumferential opening 46 enabling access to cavity 45, the size of the said opening 46 being such as to be engaged by lever 37 and to enable the switch 7 according to the present invention operates as follows. In the idle position shoun on the attached draw ings, as slide 16 is held by springs 33 against base 23, no contact exists between end 38 and drum 42, the said end 38 moving freely inside cavity 45 in drum 42 and being in no way affected by rotation of the latter, The said drum 42, on the other hand, is locked by ball 48 in one or other of the two angular positions provided for by cutouts 50. For example, in the arrangement shown in Fig. 4, the cutout 50 engaged by ball 48 is the one on the left, in which position, contact 19 engages only two of tracks 22, i.e. supply track 22 connected to the parking light circuit on the vehicle and, for example, track 22 connected to the town light supply circuit. Consequently, if the parking lights on the vehicle are turned on, current is also supplied to track 22 supplying printed circuit 20, so as to turn on the town lights via contact 19. ODviously, for disconnecting the town lights with the parking lights on, provision need simply be made for e further known type of switch forming part of the main electric circuit on control 1 and designed to cut off sup ply to supply track 22. When pull is exerted on lever 5 for flashing the road lights, slide 16 is moved away from base 23, by means of rod 8, and towards rocker arm 18. Consequently, springs 33 are compressed, end 38 moves freely inside cavity 45, still not contacting drum 42, and contact 39 slides over printed circuit 25 as far as the starting point of tracks 40, thus causing the road lights to come on. As, on account of the contrasting action exerted by springs 33, the aforementioned position is obviously unstable, when lever 5 is released, springs 33 reset slide 16 against base 23, thus causing contact 39 to abandon tracks 40 and so disconnect the road lights for producing the required flashing effect. Vice versa, for switching from town to road lights, lever 5 need same ply be pulled in such a manner as to shift slide 16 as far as the limit stop position. This results, firstly, in the road lights being turned on as a result of contact 39 engaging tracks 40 and, secondly, in end 38 cooperating with druxt 42 and producing such a torgue on the same as to overcome the resistance of spring 49, push ball 48 out of cutout 50 and turn drum 42 in the direction of the arrow (Fig,4) so as to insert ball 48 inside the other cutout 50. This obviously causes contact 79 to shift in relation to tracks 22 in such a manner as to abandon track 22 connected to the town lights and to engage track 22 connected to the road light supply circuit on the vehicle. In such it position, therefore, the road light remain on when lever 5 is released and tracks 40 abandoned by contact 39. Rotation of drum 42 also produces simultaneous rotation of the whole of rocker arm 18 and, consequently, also of crank arm 43 and spring 67, the lat- ter being displaced by shoulder block 63. Spring 61 thus exerts pressure on projection 60 so as to exert sufficient torque on end 36 to turn the latter inside projection 352 and shift end 36 from the position shown by the continuous black line (Fig.4) into the position shown by the dotted line (Fig.4). When lever 5 is next operated, lever 37, now in a position symmetrically opposite to that described previously, turns rocker arm 18 the oppo site way back to the starting position, thus disconnect ing the road lights by causing contact 19 to abandon road light supply track 22. The advantages afforded by the switch device according to the present invention and by the switch control produced employing the same will be clear from the foregoing description. To those skilled in the art it will also be clear that changes may be made to the arrangement described herein without, however, departing from the scope of the present invention.

Claims: CLAIMS 1) - Switch device (7), particularly for a vehicle switch control , characterised by the fact that it comprises a load-bearing frame (15) at least partially closed by a respective printed circuit (20) having respective conducting tracks (22); a rocker arm (18) housed in idle manner inside the said frame (is) and fitted, facing the said printed circuit (20), with a respective sliding blade contact (19) designed to coope rate with the said conducting tracks (22); a slide (16) housed in axially-sliding manner inside the said frame (is) and having activating means (8) projecting from the same; retaining means (4 & for selectively setting the said rocker arm (18) in two different angular positions in which different conducting tracks (22) on the said printed circuit (20) are engaged by the said sliding con tact (19); and transmission means (37, 61) for selective ly and alternatively displacing the said rocker arm (18) from one to the other of the said two angular positions following displacement of the said slide (16) towards the said rocker arm (18), 2) - Switch device (7) according to Claim 1, character- ised by the fact that the said slide (16) is provided internally with a through opening (31) housing at least part of the said rocker arm (18), and is secured in slid ing manner inside guides (32) formed inside the said frame (15); the latter housing flexible contrasting means (33) designed to impede displacement of the said slide (16), inside the said guides (32), towards the said rock er arm (18), and the said activating means consisting of a rod (8) integral with the said slide (16) and designed to be secured to a lever (5) controlling the said switch control; the said rod (8) being arranged with its axis parallel to that of the said guides (32) on the frame. 3) - Switch device (7) according to Claim 1 or 2, charac terised by the fact that the said rocker. arm (18) comprises a rotary drum (42) having the said sliding contact (19), opposite coaxial connecting pins (29) and an inner cavity (45) to which access is afforded through a curcumferential opening (46) formed on the drum (42) itself; a crank arm (43) angularly integral with and projecting in relation to the said drum (42); and a radial housing (44) for the said retaining means (48). 4) - Switch device (7) according to Claims 2 and 3, characterised by the fact that the said crank arm (43) is housed inside the said opening (31) on the said slide (16), whereat the said drum (42J with the said housing, both formed integral with the said crank arm (43), = e arranged facing the said slide (16) and housed between: the latter and the said printed circuit (20) closing the said frame (15); the said rocker arm (78) being secured to the said printed circuit (20). 5) - Switch device (7) according to Claim 3 or 4, charac terised by the fact that it comprises a pair of facing printed circuits (20, 25) closing opposite faces (21, 26) of the said frame (15) in such a manner as to define, with the said frame (its), a casing for housing the said slide (16) and the said rocker arm (18); the said printed circuits (20, 25) being secured integral with the said frame (15) and being provided with respective facing con ducting tracks (22, 40) and with supporting holes (28) in which are secured in idle tanner the said pins (29) secUring the said rocker arm (18); the said slide (16) having a second sliding contact (39) cooperating with the printed circuit (25) opposite the one cooperating with the contact (19) on the said drum (42). 6) - Switch device (7) according to one of the foregoing Claims, characterised by the fact that the said retain- ing means comprise a ball (48), housed radially inside the said rocker arm (18), and a contrast spring (49) for the said ball (48) ; the latter being designed to engage in reversible anner, via the said spring (49), a pair of cutouts (50) angularly offset in relation to the rotation axis of the said rocker arm (18) and formed inside the said frame (is). 7) - Switch device (75 according to one of the foregoing Claims from 3 to 6, characterised by the fact that the said transmission means comprise a lever (37), a first end (38) of which is houses in mobile manner inside the said cavity (45) on the said drum (42) through the said circumferential opening (46), and a second essentially fork-shaped end (36) of which is hinged inside a flexible fork-shaped projection (35a) on the said slide (16); and a torsion spring (61) also essentially fork-shaped, secured to a pin (62) on the said crank arm (43) on the said rocker arm (18) and engaging a projection (60) on the said second end (36) of the said lever (37), 8) - Switch dearice (7) according to Claim 7, characterised by the fact that the said crank arm (43) is provided with a shoulder block (63) for the said fork spring (61), the said block (63) being designed to turn the said spring (61) integral with the said drum, in such a manner as to turn the said lever (37) inside the said fork projection (35a) and so displace the said first end (38) of the said lever (37) inside the said cavity (43); ; the said first end (38) being designed to cooperate with the said drum (42), subsequent to displacement of the said slide (16) in the direction of the said drum (42), in such a manner as to turn the said rocker arm (1 8). 9) - Vehicle switch control (1) characterised by the fact that it comprises d switch device (7) according to one of Claims 1 to 8 for switching from road to town lights or vice versa and for flashing the road lights, the said switch device (7) being controlled by means of a control lever (5). 10) - Switch control (i) according to Claim 9, character¯ ised by the fact that the said control lever (5) is provided with a through hole (iso) inside which a rod (8' for controlling the said switch device (7) is secured by means of a spring shoulder ring (72); and by the fact that a supporting box (2), to which the said lever (5) is secured and inside which the said switch device (7) is housed, is provided with a hole (13) coaxial with the said control rod (8), larger in diameter than the said spring shoulder ring (12) and enabling assembly of the latter on the said control rod (8).

Inventors: CONTATO, UGO, RECLUTA, FRANCO
Applicants: FIAT AUTO S.P.A.
Application year: 1985
Main classification: B60Q1
IPC codes: H01H13, B60Q1