FR2737039A1 - Motor vehicle steering column lever switch with axial pushbutton - utilises pushbutton to displace switches between rest and operating position and ring rotating on casing to reverse displacement - Google Patents

Abstract

The electric switch includes switches which are temporarily locked by a mechanism connected directly or indirectly to the pushbutton and arranged to come into action with an element connected to the casing (100) or alternatively to the ring (300). The ring is indexed and acts on the pushbutton by means of a ramp (330) to displace it longitudinally when the ring is rotated, or it acts on the locking mechanism or the element. The locking mechanism comprises a plate (170) with a heart-shaped cam and a finger (270) acted on towards the cam by a spring. The plate is supported by the element while the finger is carried by the pushbutton or a rigid rod (250) and lies radially relative to the longitudinal axis of the lever.

Description

 The present invention relates to the field of electrical switches for motor vehicles.

 Numerous electrical switches, in particular for the control of lights and headlamps, direction change indicators, wipers and window / window washers have already been proposed.

 The present invention now aims to improve the known electrical switches, in particular as regards their actuation comfort.

 This object is achieved according to the present invention by means of an electric switch comprising a lever provided with a push button mounted in translation and adapted to alternately move electrical switching means between a rest position and a working position, during its actuations. successive, and a ring mounted for rotation and adapted to unlock the switching means, from the working position to the rest position, when it is actuated.

 According to another advantageous characteristic of the invention, provision is made for temporary locking means of the switching means, linked directly or indirectly to the push button and adapted to engage with an element linked to the ring or to the handle housing.

 According to another advantageous characteristic of the invention, the ring is adapted to act on the push button or the temporary locking means or else the aforementioned element linked to the ring or to the handle housing.

 According to another advantageous characteristic of the invention, the ring acts on the push button by means of at least one ramp adapted to urge the push button in translation.

Other characteristics, objects and advantages of the present invention will appear on reading the detailed description which follows, and with reference to the appended drawings given by way of nonlimiting examples and in which - FIG. 1 represents a schematic view in longitudinal axial section of a switch lever according to a first embodiment of the invention, in the rest position, - Figures 2, 3, 4, 5 and 6 show five cross-sectional views of the lever according to this first embodiment according to cutting planes referenced II-II, III-III, IV-IV, VV and VI-VI in Figure 1, - Figure 7 shows a plan view of a heart cam used in the context of the handle according to this first embodiment, - Figure 8 shows a view in longitudinal axial section of a handle according to a second embodiment of the invention, according to the sectional plane referenced VIII-VIII in the figures 10 and 11, - Figure 9 shows a second view in longitudinal section of the lever according to the second embodiment according to the cutting plane referenced IX-IX in Figure 11, - Figure 9A shows a detailed view of the locking means according to this second embodiment, to illustrate their operation, - Figures 10, 11, 12 and 13 show four cross-sectional views of the lever according to the second embodiment according to the sectional planes referenced XX, XI-XI, XII-XII and XIII-XIII in FIGS. 8 and 9, - FIG. 14 represents a view in longitudinal axial section of a lever according to a third embodiment of the present invention, - FIGS. 15, 16 and 17 represent three views in cross section of this controller according to the cutting plans referenced XV-XV, XVI-XVI and XVII
XVII in Figure 14, and - Figures 18 to 22 show three schematic views in longitudinal axial section of the front end of the lever according to the third embodiment, Figures 18 to 22 illustrating the successive stages of operation of the means of locking.

 We will first describe the general structure of the lever according to the various embodiments of the present invention, before describing in more detail the locking means specific to each of these embodiments.

 The lever preferably extends in a generally radial direction relative to the axis of the steering column. Thereafter the term a rear "will be used to qualify the part of the lever close to the column, preferably integrated in a switch box, while the term" front "will be used to designate the part of this lever corresponding to its end free opposite.

 The various electrical switch handles represented in the appended figures mainly comprise: a support body or housing 100, a push button 200 and a ring 300.

 These elements are generally centered on a longitudinal axis of a lever referenced O-O.

 The joystick shown in the appended figures is designed to provide different electrical switching functions, preferably: 1) when the whole of the joystick comprising the elements 100, 200, 300 mentioned above is pivoted, 2) during the translation of the button pusher 200 and 3) during the rotation of the ring 300.

 By way of nonlimiting example, the pivoting of the whole of the lever can be used for controlling the direction change indicators of a motor vehicle; the translation of the push button 200 can be used to control the rear fog lights; and the rotation of the ring 300 around the axis OO can be used to control the vehicle lights respectively in three stable rest positions, that is to say lights off, city lights and main beam, with reset of the push button in rest position, that is to say rear fog lights off, when the ring 300 leaves the high beam position.

 The support body 100 is preferably formed from two parts: a sheath 110 and a rear end piece 150.

 The rear end piece 150 preferably comprises a spherical ball joint 152 extended forwards by a cylindrical tubular barrel 154 and rearwards by a finger 156.

 The ball joint 152 centered on the axis O-O allows the body 100 to pivot in at least one plane, preferably two planes perpendicular to each other, according to the constraints imposed by the housing which receives the rear end of the lever 100.

 The barrel 154 is centered on the longitudinal axis GO.

The finger 156 is preferably eccentric relative to this axis S
O. Thus, the movements of the body 100 by pivoting of the ball joint 152 around its center lead to a switching effect, either by direct actuation of an electrically conductive switching blade by means of the aforementioned finger 156, or indirectly by displacement of a switching drawer provided with a fork engaged with the finger 156, which drawer itself provides an electrical switching effect.

 The sheath 110 is engaged on the barrel 154. I1 is flared forward and preferably has internal radial ribs 112.

 The ring 300 is guided in rotation on the front of the sheath 110.

The ring 300 is linked in rotation with a tube 350 centered on the axis
OO, engaged in the tubular barrel 154 and passing through a channel 153 formed in the ball joint 152. The tube 350 is provided at its rear end 352, emerging from the housing 100, with an eccentric driving finger 354.

 The ring 300 preferably comprises a generally external cylindrical skirt 310 provided with several internal radial fins 312 which carry an internal cylindrical skirt 314. The latter is engaged on the front end 356 of the tube 350 and linked in rotation with the latter. As a variant, the external skirt 310 and the internal skirt 314 can be formed from separate parts connected to each other in rotation by complementary radial fins.

 The rotation of the ring 300 around the axis O-O leads to a rotation of the driver 354 which causes an electrical switching effect by acting directly on an electrically conductive blade, or even indirectly by moving a drawer comprising switching means.

 Preferably, the ring 300 is indexed in its rotation around the axis O-O to occupy stable positions and / or precise unstable positions.

 The indexing means of the ring 300 preferably comprise an indexing washer 360. The washer 360 is placed in the internal chamber of the lever, inside the front end of the sheath 110 and the rear end of the ring 300.

 The washer 360 is linked in rotation with the ring 300, for example by means of ribs 362 engaged with the ring 300, such as for example with the internal radial ribs 312 integral with the latter.

 The indexing washer 360 is biased towards the rear by a spring 370.

Thus, the indexing washer 360 is biased towards the front end of the ribs 112 linked to the sheath 110. The indexing of the washer 360 is defined by cooperation of the front end of the ribs 112 and complementary notches defined on the surface rear of the washer 360, which notches according to their geometry define stable or unstable positions of the ring 300 in rotation about the axis O- Q
The spring 370 is interposed between a recess 313 formed on the ribs 312 of the ring 300 and a bearing surface 366 formed on the washer 360.

 As can be understood on examining the appended figures, preferably the spring 370 is a spiral spring engaged in the internal chamber of the washer 360 and maintained at the origin, that is to say before assembly in the handle, by a toothing 364 linked to the washer. The teeth 364 supplement the mounting 313 before mounting.

 Of course, the distance separating the toothing 364 and the bearing surface 366 for the spring, on the washer 360, must be greater than the distance separating after mounting the recess 313 and the bearing surface 366.

 The push button 200 is mounted in translation along the axis O-O on the front end of the lever.

 The push button 200 is linked to a rod 250 itself guided in sliding along the axis O-O inside the tube 350.

 The rod 250 emerges at the rear end of the lever in order to ensure an electrical switching effect during its translation.

 The push button 200 is biased towards the outside of the lever by a spring 210.

 According to the embodiments shown in FIGS. 1 to 7 and 14 to 22, the spring 210 is interposed between the push button 200 and the ring 300.

 On the other hand, according to the second embodiment shown in FIGS. 8 to 13, the spring 210 is interposed between the push button 200 and an element 160 linked to rotation and to translation with the body 100.

 However, the push button 200 is limited in its movement towards the outside in order to prohibit an ejection of the push button 200 under the effect of the bias of the spring 210.

 To this end, preferably, the push button 200 is provided with a plurality of teeth 202 equi-distributed on its periphery, which teeth 202 are adapted to engage with an internal recess 302 formed at a converging edge on the front end of the ring 300.

 More precisely still, according to the embodiment shown in FIGS. 1 to 7, the push button 200 is formed from a separate part from the rod 250. Nevertheless, the push button 200 is linked in translation with the rod 250 by means of elastic structures with form complement 204; 252 provided respectively on the push button 200 and the rod 250. Furthermore, the spring 210 acts on a flared head 254 formed on the rod 250.

 According to the second embodiment shown in FIGS. 8 to 13, the push button 200 is formed in a single piece with the rod 250.

 Finally according to the third embodiment shown in Figures 14 and following, the button 200 and the rod 250 are formed of separate parts. Furthermore, the push button 200 is biased outwards by a spring 210 interposed between the push button 200 and a structure linked to the ring 300 while the rod 250 is also biased towards the front of the lever by a specific spring 260 interposed between a flared head 254 provided at the front end of the rod 250 and a structure integral with the part 160 linked to the sheath 110.

 In addition, the handle according to the present invention comprises means for temporarily locking the push button 200 and / or the rod 250 in a working position, after the push button 200 is moved in translation towards the inside of the handle. These locking means are adapted to be brought back to the rest position either by manual actuation of the push button 200, or by rotation of the ring 300.

 Generally, these locking means comprise a fastening structure 270 linked directly or indirectly to the push button 200 and the rod 250, and adapted to come into engagement with an element, such as the element 160, linked to the body 100, see if necessary with the ring 300.

 We will now specify the structure of the locking means in accordance with the first embodiment shown in FIGS. 1 to 7.

 According to the first embodiment shown in FIGS. 1 to 7, the locking elements comprise a plate 170 and a finger 272 biased by a spring 274 towards the plate 170.

 The plate 170 is formed in the part 160 linked in rotation and in translation with the sheath 110. The plate 170 carries a heart-shaped cam 172 as shown in FIG. 7. The heart cam 172 generally extends in a parallel plane to the axis OO, opposite the finger 272. This finger 272 is guided in radial translation relative to the axis OO in a complementary chamber 256 formed on the front end of the rod 250. The spring 274 biases the finger 272 radially outwards against the cam 172. The tip 173 of the heart cam is directed towards the front of the lever while the dihedral 174 defined by the heart cam is directed towards the rear of the lever.

 The axis 175 of the cam 172 passing through this point 173 and the center of the dihedral 174 extends parallel to the axis O-O.

 Those skilled in the art will readily understand that the cooperation between the indexing finger 272 and the heart cam 172 defines two stable positions for the push button 200 and the rod 250 which is linked to it: a first stable position, or position of rest, when the finger 172 is placed at the point 173 of the core cam, and a second stable position, called the working position, when the indexing finger 272 is placed in the dihedron 174 of the cam.

 Preferably, in the context of the invention, the passage from the rest position to the working position of the push button 200 and of the rod 250 is only possible in the "road" position of the ring 300. Indeed , in the other angular positions of the ring 300, two ribs 320, 322 integral with the ring 300 serve as a stop for the push button 200 and prevent its translation.

 The reset in the rest position of the push button 200 and of the rod 250 can be obtained manually. Indeed, from a working position, a pressing of the push button 200 towards the inside of the lever creates an overtravel of the finger 272 allowing the latter to escape the dihedral 174 and to return towards the tip 173 of the heart cam 172. The return to the rest position of the system is ensured by the spring 210.

 In addition, the ring 300 is provided on its internal periphery with at least one cam 330 (preferably several cams 330 equi-distributed around the axis OO) capable of urging the push button 200. More precisely, the cam or cams 330 are suitable for urging the push button 200 towards the inside of the lever when the ring 300 is rotated about the GO axis, from its road position to another position, city or rest.

 Again, it is thus created an overtravel of the finger 272 towards the inside of the ring making it possible to release the finger 272 from the dihedral 174.

 Those skilled in the art will understand that the movement of finger 272 in the heart cam 172, from the rest position to the working position, and vice versa from the working position to the rest position, requires a relative peripheral displacement between the finger 272 and the cam 172. This relative displacement can be obtained by rotation of the push button 200 and of the rod 250 which is linked to it around the axis GO, or also by peripheral displacement of the core cam 172 in its housing item 160.

 According to an alternative embodiment, it is conceivable to reverse the position of the heart cam 172 and the associated finger 272, by placing the heart cam 172 on the rod 250, and conversely the finger 272 on the element 160, while ensuring to urge the finger 272 radially inward, ie in the direction of the heart cam 172.

 In FIG. 1, the positions occupied by the finger 272 are shown diagrammatically under the references 1, 2 and 3, in the rest position in the tip 173 of the core cam, in the working position in the dihedral 174, and in the unstable position of overtravel, when unlocking. Furthermore, in the appended figures, the angular positions of the ring 300 respectively in the rest position, city and road, are shown diagrammatically under the references O, V and R.

 On examining the appended figures, it will be noted that the element 160 linked to the body 100 is engaged in at least one longitudinal chamber of the ring 300 formed between two ribs 312 as visible in particular in FIGS. 2 and 3.

 We will now describe the structure of the locking means in accordance with the second embodiment shown in FIGS. 8 to 13.

 According to this second embodiment, the locking means essentially comprise a plate 280 linked to the push button 200 and having a heart cam 282, associated with a rod 180 linked to the element 160.

 The heart cam 282 is defined in a plane parallel to the axis GO.

Its point 283 is directed towards the rear of the lever. The dihedron 284 of the heart cam is directed towards the front end of the lever. The axis 285 of the heart cam 300 passing through the tip 283 and its dihedral 284, extends substantially parallel to the axis GO.

 The rod 180 is elastic. It extends substantially parallel to the axis O-O at rest. However, the front end of the rod 180 is curved radially with respect to the axis GO as illustrated at 182 in FIG. 8, to come into engagement with the cam 282.

 Again the cooperation defined between the rod 180 and the heart cam 282 defines two stable positions for the push button 200 and the rod 250: a rest position when the end 182 of the rod 180 is placed opposite and at a distance from the tip 283 as illustrated in FIG. 9, and a working position when the end 182 of the rod 180 is engaged in the dihedral 284 after translation of the push button 200.

 Manual unlocking of the push button 200 from the working position to the rest position can be obtained as indicated above for the first embodiment by further pressing of the push button 200.

 However, moreover, the rod 180 can be deformed in the peripheral direction, as shown diagrammatically in FIG. 9 at 182 ′, by virtue of an internal radial rib 335 (see FIG. 12) integral with the ring 300.

 A stop 320 integral with the ring 300 again prohibits a translational movement of the push button 200 from the rest position to the working position when the ring 300 is in the city or rest position.

 When the ring 300 is in the road position, a translational movement of the push button 200 towards the inside of the lever engages the end 182 of the rod 180 and the dihedron 284 of the core cam. During this movement, the end 182 of the rod 180 follows the path referenced 1 in FIG. 9A.

 During a subsequent actuation of the push button 200, to unlock the system from the working position to the rest position, the end 182 of the rod 180 follows the path referenced 2 in FIG. 9A to return opposite the point 283 of the heart cam.

 Finally, when the button 200 is in the working position and the ring 300 is moved from the road position to the city or rest position, the end 182 of the rod 180 follows the path referenced 3 in FIG. 9A to reach the positions referenced C and D in FIG. 9A.

 In this same FIG. 9A, the positions occupied by the end 182 of the rod 180 in the road position of the ring 300 and respectively in the rest position of the button 200 and work of this button 200, are referenced A and B.

 We will now describe the structure of the locking means according to the third embodiment shown in Figures 14 and following.

 According to this third embodiment, the locking means essentially comprise a blade with two stable positions, called blistering, 290 associated with a movable stud 240.

 The blistering blade 290 extends along the GO axis. It is driven by its rear end 292 in the front end of the rod 250. In addition, the front end 294 of the blistering blade 290 is provided with a protuberance 296, preferably cylindrical of revolution around the axis 00 .

 The movable stud 240 is interposed between the front end of the blistering blade 290 and the rear surface of a barrel 201 secured to the button 200.

 The stud 240 has a generally tapered shape towards the front. I1 has an internal recess 241 which opens onto its rear surface and receives the abovementioned protuberance 296. At its base or rear end, the stud 240 has an outer surface 242 of cylindrical revolution. On the other hand, as can be seen in particular on the section plane of FIG. 15, the front section 244 of the stud 240 has a non-symmetrical cross section of revolution, preferably rectangular.

 The section 244 is placed in a chamber 304 of the ring 300.

The cross section of the chamber 304 is adapted so that the section 244 of the stud 240 can pivot relative to the ring 300 transversely to the axis O-O. However, the section 244 of the stud 240 is linked to rotation with the ring 300.

 To this end, preferably, as can be seen in FIG. 15, the chamber 304 has a generally square cross section whose sides are substantially equal to the great width of the section 244.

 The stud 240 also has, at its transition zone between the rear ring 242 and the front section 244, and on two lateral surfaces diametrically opposite with respect to the GO axis, external recesses 246, 248 projecting towards the 'before.

 The recess 246 is formed by a sector of revolution around the GO axis. It can be the same for the second step 248.

However, it can also be formed of a rectilinear rib.

 The recess 246 of the stud 240 is adapted to cooperate with a complementary recess 166, directed towards the rear, integral with the part 160. This recess 166 is also formed by a sector of revolution around the axis GO.

 The second step 248 provided on the stud 240 is adapted to cooperate with a complementary step 306 formed on the ring 300. The first step 166 provided on the element 160 is placed behind the second step 306 provided on the ring 300.

 We will now describe the operation of these locking means with reference to FIGS. 18 to 22.

 The locking stud 240 is shown in the rest position in FIG. 18. In this position, the push button 200 is in the external projection position and the ring 300 is in the road position.

 When, as shown diagrammatically in FIG. 19, the push button 200 is biased towards the inside of the lever, thanks to the blistering blade 290 the base 242 of the pad 240 rests on the plane 305 of the chamber 304 then exceeds the step 166 if the amplitude of the translation of the push button 200 allows it.

 When the push button 200 is released as shown diagrammatically in FIG. 20, the driving rod 250 under the bias of the spring 260 pushes the stud 240 forward so that the latter rocks in abutment against the surface 305.

 The recess 246 of the stud 240 then engages against the recess 166 of the element 160 to lock the rod 250 in the working position (see FIG. 21). The electrical function, for example rear fog supply is then ensured.

 To unlock the rod 250 and eliminate this electrical function, it is possible, as shown diagrammatically in FIG. 22, to press the push button 200 again in order to remove the step 246 from the pad 240 from the additional step 166. The combined action of the rod 250, driving under the stress of the spring 260, and the blistering blade 290 rocks the base 242 of the pad 240 away from the recess 166 as seen in FIG. 22. The pad then rests on the plane 307 diametrically opposite to the plan 305 above so that the pad 240 and the button 200 are brought forward. The rod 250 is thus unlocked.

 At the end of the return stroke, the recess 248 of the stud again engages with the recess 306 of the ring as illustrated in FIG. 18.

 Unlocking the above-mentioned means from the working position illustrated in FIG. 21 (recess 246 engaged with the recess 166) can also be obtained by rotation of the ring 300 in the city or rest position. In fact, when the ring 300 is driven in rotation about the GO axis, the stud 240 is also driven in rotation thanks to the engagement of its section 244 in the chamber 304. As soon as the recess 246 of the stud 240 escapes when the element 160 recesses 166, the stud 240 is released and moved forward by the rod 250, driven by the effect of the spring 260. It should also be noted that when the ring 300 is in the city position or at rest, the step 246 of the stud 240 is angularly offset with respect to the step 166 of the element 160 so that the locking of the rod 250 in the working position cannot be obtained.

 Of course the present invention is not limited to the particular embodiments which have just been described but extends to any variant in accordance with its spirit.

Claims (26)

 1. Electric switch, in particular for motor vehicles, characterized in that it comprises a lever provided with a push button (200) mounted in translation on a housing and adapted to alternately move electrical switching means (250) between a rest position and a working position, during its successive actuations, and a ring (300) rotatably mounted on the housing and adapted to unlock the switching means (250) from the working position to the rest position , when activated.  2. Switch according to claim 1, characterized in that it comprises means (240, 270, 280) for temporary locking of the switching means (250), connected directly or indirectly to the push button (200) and adapted to come engaged with an element (160, 170, 180, 166, 306) linked to the ring (300) or to the housing (100).  3. Switch according to one of claims 1 or 2, characterized in that the ring (300) is adapted to act on the push button (200) or locking means (240, 270, 180) or an element ( 160) linked to the housing (100).  4. Switch according to one of claims 1 to 3, characterized in that the ring (300) is adapted to act on the push button (200) via at least one ramp (330) in order to move the translational push button when the ring (300) is itself rotated.  5. Switch according to one of claims 1 to 4, characterized in that the locking means comprise a plate (170) provided with a heart cam (172) and a finger (270) biased by spring towards the heart cam .  6. Switch according to claim 5, characterized in that the plate (170) is carried by an element (160) linked to the housing (100) while the finger (270) is carried by the push button (200) or a rigid rod (250) linked thereto.  7. Switch according to one of claims 5 or 6, characterized in that the finger (270) is oriented radially relative to the longitudinal axis of the lever.  8. Switch according to one of claims 1 to 4, characterized in that the locking means comprise a plate (270) provided with a heart cam (282) and an elastic rod (180) adapted to engage with the heart cam (282).  9. Switch according to claim 8, characterized in that the plate (270) is carried by the push button (200) or a rigid rod (250) linked thereto while the elastic rod (180) is carried by an element (160) linked to the housing.  10. Switch according to one of claims 8 or 9, characterized in that the elastic rod (180) extends in a longitudinal direction and has a radially curved end (182) capable of engaging with the heart cam ( 282).  11. Switch according to one of claims 8 to 10, characterized in that the elastic rod (180) is adapted to be moved in the peripheral direction by a finger (335) linked to the ring (300).  12. Switch according to one of claims 1 to 4, characterized in that the locking means comprise a stud (240) associated with a blistering blade (290).  13. Switch according to claim 12, characterized in that the blistering blade (290) is engaged with a rod (250) associated with the push button (200), and the stud (240) is interposed between the push button (200 ) and the blistering blade (290).  14. Switch according to one of claims 12 or 13, characterized in that the stud (240) comprises two attachment structures (248, 246) capable of respectively engaging with complementary attachment structures (306 and 166) provided respectively on the ring (300) and on an element (160) linked to the housing.  15. Switch according to one of claims 12 to 14, characterized in that the stud (240) has a shape (244) complementary to the ring (300) so that the stud (240) is linked in rotation with the ring (300) when the stud is engaged on an attachment structure (166) secured to an element (160) linked to the housing.  16. Switch according to one of claims 12 to 15, characterized in that the two attachment structures (166, 306) provided respectively on an element (160) connected to the housing and on the ring (300) are axially stepped .  17. Switch according to one of claims 1 to 16, characterized in that there are stops (320, 322) on the ring (300) to prevent translation of the push button (200) in certain angular positions of the ring (300).  18. Switch according to one of claims 1 to 17, characterized in that the lever is adapted to ensure different electrical functions according to 1) the pivoting of the housing, 2) the translation of the push button (200), and 3) the rotation of the ring (300).  19. Switch according to one of claims 1 to 18, characterized in that it is adapted to ensure control of rear fog lights when the push button (200) is actuated.  20. Switch according to one of claims 1 to 19, characterized in that it is adapted to ensure control of the direction change indicators when the lever is pivoted and a selection of lights for rest, city, road, during the rotation of the ring (300).  21. Switch according to one of claims 1 to 20, characterized in that the ring (300) is linked in rotation with a tube (350) guided in rotation in the body of the lever and provided at its rear end with an eccentric coach (354).  22. Switch according to one of claims 1 to 21, characterized in that the push button (200) is associated with a rod rod (250) mounted in axial translation in the handle (200) and adapted to be translated during successive actuations of the push button (200).  23. Switch according to one of claims 1 to 22, characterized in that the push button (200) is biased projecting towards the front of the lever by a spring (210).  24. Switch according to one of claims 1 to 23, characterized in that the push button (200) is formed in one piece with a rigid rod (250) extending axially in the body of the lever and emerging at the rear end thereof to provide an electrical switching effect.  25. Switch according to one of claims 1 to 23, characterized in that there is provided a rigid rod (250) mounted in axial translation in the body of the lever and connected in translation with the push button (200).  26. Switch according to one of claims 1 to 23, characterized in that there is provided a rod (250) mounted in translation in the body of the lever and operatively connected in translation with the push button (200), rod (250) and the push button (200) being urged forward by respective springs (260, 210).