Electrical switch comprising a toggleable control button

Abstract

The invention relates to a switch comprising a control button (300) capable of toggling by a first angle (A1) about a first axis of rotation (X1), a toggleable part (200) located under the control key, capable of toggling about a second axis of rotation (X2), by a second angle (A3) greater than the first angle, an arm (310) extending from the control key in the direction of the toggleable part and comprising a free end (311) provided with a sliding surface (312), and a cam surface (211) borne by the toggleable part. According to the invention, the cam surface has two faces (211A, 211B) forming an angle of between 0 and 60 degrees, over which faces the sliding surface of the arm slides when the control button is toggled by the first angle to bring about the toggling of the toggleable part by the second angle.

Description

Description Title of the invention: Electric switch with rocker control key

[0001] The present invention relates, in general, to electrical switches.

[0002] The invention relates more particularly to a switch which comprises a control key, accessible to the user, adapted to tilt through a first angle around a first axis of rotation, and a tilting part located under the control key, adapted to tilt around a second axis of rotation, distinct from the first axis of rotation, through a second angle greater than said first angle.

[0003] The invention finds a particularly advantageous application in the production of a switch or a two-way switch. The tilting part is then a driver which drives a movable contact brush between two switching positions.

[0004] Currently, there are various systems in which the control key has a small tilting angle and is capable of tilting an internal part by an angle sufficient to move a movable contact element between two determined switching positions.

[0005] The low tilt angle of the control key is a feature sought by manufacturers to facilitate the actuation of the switch and improve its aesthetics.

[0006] A system already known consists of providing under the control key, two rocking elements each having a pivot axis positioned off-center relative to the axis of rotation of the control key. The two rocking elements are placed on either side of the axis of rotation of the control key so that they are able to alternately engage with said internal rocking part. When actuated, the control key rocks one or other of the rocking elements which, itself, acts on said internal part to rock it by the determined angle.

[0007] Such a system is notably described in document CN214068620 U.

[0008] Another already known system, described in document CN103681074, consists of providing between the control key and said tilting internal part, a transition part which is articulated around the axis of rotation of the control key and comprises a yoke forming an axis of rotation for said internal part which cooperates with this yoke. Furthermore, in this system, two arms are provided which extend from the rear face of the control key and which bear on two opposite parts of the internal part to tilt it in the yoke when said control key is tilted.

[0009] The main disadvantage of the aforementioned known systems is that they involve one or more additional articulated elements between the control button and the said internal part to be actuated. Each additional articulated element complicates the construction of the system and consequently increases its manufacturing cost.

[0010] Finally, document CN113345750 discloses a switch comprising a control key whose rear face carries an arm which extends towards the rear, perpendicular to said rear face. The free end of the arm comprises a concave half-cylinder surface which cooperates with a cylindrical surface of a tilting part adapted to actuate a movable contact brush between two fixed contacts.

[0011] In order to overcome the main drawback of the aforementioned state of the art, the present invention proposes an alternative solution to that disclosed in document CN113345750, according to which a new switch comprises a control key which has a small tilting angle and which cooperates directly with said internal part to tilt it by the determined angle. The expression "cooperates directly" means that in the switch proposed according to the invention, no additional moving part is provided in relation to the control key which cooperates with said internal part.

[0012] More particularly, according to the invention, a switch is proposed which comprises: - a control key, accessible to the user, adapted to tilt from a first angle around a first axis of rotation, - a tilting part located under the control key, adapted to tilt around a second axis of rotation, distinct from the first axis of rotation, by a second angle greater than said first angle, - an arm fixedly attached to the control key, which extends from the control key, directly above said first axis of rotation, perpendicular to it, in the direction of said tilting part and which has a free end provided with a sliding surface, and - a cam surface carried by the tilting part, wherein said cam surface has two sides forming an angle of between 0 and 60 degrees, on which the sliding surface of the free end of the arm slides when the control key is tilted by said first angle to cause said tilting part to tilt by said second angle.

[0013] Other characteristics of the switch according to the invention are as follows:

[0014] - said sliding surface is a portion of a cylindrical or spherical surface;

[0015] - the first tilting angle of the control key is between 3 and 5 degrees while the second tilting angle of said tilting part is between 8 and 10 degrees, preferably of the order of 9 degrees;

[0016] - the arm has a length measured from the first axis of rotation to its free end equal to 8 millimeters for a first tilting angle of the control key equal to 5 degrees;

[0017] - the first tilt angle of the control key is around 3.5 degrees.

[0018] - the arm has a length measured from the first axis of rotation to its free end equal to 9.5 millimeters;

[0019] - the two sides of the cam surface are inclined relative to each other and the cam surface has a V-shaped profile;

[0020] - the angle formed between the two sides of the cam surface is of the order of 55 degrees;

[0021] - two parallel arms of the same length are provided, fixedly attached to the control key, each arm having a free end provided with a sliding surface cooperating with a cam surface carried by said tilting part;

[0022] - the two sides of the cam surface are parallel to each other and the cam surface has a U-shaped profile;

[0023] - the control key comprises two assembled parts, fixed relative to each other, an external part for the support of a user's finger and an internal part, arranged under the external part, from which said arm extends;

[0024] - the external part is in the form of a plate and the internal part is in the form of a sub-plate which forms an angle of between 1 and 2 degrees with said plate;

[0025] - the external part is snapped onto the internal part; and

[0026] - said tilting part is a driver which drives a movable contact brush between two switching positions.

[0027] The description which follows with reference to the appended drawings, given as non-limiting examples, will make it clear what the invention consists of and how it can be implemented.

[0028] On the attached drawings:

[0029] Figure 1 is an exploded schematic perspective view of two variants of a first embodiment of the switch according to the invention,

[0030] Figure 2 is a schematic side assembled view of the first variant of the switch of Figure 1,

[0031] Figure 3 is a sectional view along plane III of Figure 2,

[0032] Figure 4 is a schematic view of the principle of the first variant shown in Figure 2,

[0033] Figure 5 is a schematic side assembled view of the second variant of the switch of Figure 1,

[0034] Figure 6 is a sectional view along plane VI of Figure 5,

[0035] Figure 7 is a schematic view of the principle of the second variant shown in Figure 5,

[0036] Figure 8 is a side view of a second embodiment of the switch according to the invention,

[0037] Figure 9 is a partial side view of the switch of Figure 8,

[0038] Figure 10 is a sectional view along plane AA of the switch of Figure 8 in a first switching position, and

[0039] Figure 11 is a sectional view along plane AA of the switch of Figure 8 in a second switching position.

[0040] Figures 1 to 7 show two variants of a first embodiment of a switch 10 according to the invention.

[0041] The two variants are distinguished from each other by their control key.

[0042] The control key 300 of the first variant is longer than the control key 400 of the second variant.

[0043] The length L1 of the control key 300 is between 70 and 75 millimeters.

[0044] The length L2 of the control key 400 is equal to 45 millimeters.

[0045] In both variants, the switch 10 comprises a base 100 made of insulating material which houses a tilting part 200 and electrical terminals (not shown in FIGS. 1 to 7) comprising fixed contacts and a movable contact brush (also not shown in FIGS. 1 to 7) electrically connected to an electrical terminal. The tilting part 200 is a driver capable of driving the movable contact brush between two switching positions.

[0046] The base 100 and the tilting part 200 are conventionally plastic elements each made from a single piece by a molding operation.

[0047] When the switch 10 is a simple switch, one of the switching positions corresponds to the contact grain of the movable contact brush being brought into contact with the contact grain of a fixed contact while the other switching position corresponds to placing the movable contact brush out of contact with a fixed contact. When the switch 10 is a two-way switch, the two switching positions correspond to the contact grain of the movable contact brush being brought into contact with the contact grain of two different fixed contacts.

[0048] The base 100 is a housing, here rectangular in shape, with two parallel longitudinal walls 110, 120 and two parallel side walls 130, 140. It comprises, at the front, a peripheral edge 102 which delimits a front opening through which the driver 200 is mounted in the base 100. Just below the peripheral edge 102, the longitudinal walls 110, 120 carry on their external face two aligned trunnions 106 which define a first axis of rotation XI for the control key, perpendicular to the external faces of said longitudinal walls 110, 120 (see figures 2, 3, 5 and 6). Below the trunnions 106, the base 100 comprises a peripheral pavement 103 which projects from the external face 101 of the housing. Furthermore, there is provided on the external face of each side wall 130, 140, a tooth 104 facing the sidewalk 103 and an inclined face 105 which extends from the tooth 104 to the external face of the side wall.The space between the sidewalk 103 and each tooth 104 has a height which corresponds, within clearance, to the height of a hooking rib of an apparatus support (not shown here) so that the sidewalk 103, the tooth 104 and the inclined face 105 form on the external face of each wall. lateral 130, 140, conventional mounting means of the base 100 on the equipment support. For its mounting, the base 100 is engaged in an opening of the equipment support so that the inclined sides 105 slide on a part of said support until the teeth 104 hook onto the hooking rib of the support and the sidewalk 103 rests on said support. Thus, the equipment support is sandwiched between the sidewalk 103 and the teeth 104 of the base 100 which is secured to it. Finally, as shown in Figures 1, 2, 3, 5 and 6, each longitudinal wall 110, 120 of the base 100 comprises, here, a wide opening 111, 121 whose edge forms, locally, near the bottom of the base, a seat 112, 122 with a concave bottom centered on a second axis X2 (see Figures 2 and 5). The second axis X2 and the first axis of rotation XI are distinct, coplanar and parallel.The first and second axes XI and X2 belong to the planes III-III and VI-VI identified respectively in figures 2 and 5.

[0049] The tilting part 200, forming the driver of the switch 10, comprises two parallel flanks 210. Each flank 210 carries projecting on its external face 210A (i.e. the face facing the walls of the base when the driver is fitted into the base) a stud 212 of which at least part of the edge is rounded. As shown in Figures 2, 3, 5 and 6, the tilting part 200 is attached to the base 100 in such a way that its sides 210 close off part of the openings 111, 121 of the base 100 and that the studs 212 carried by the sides 210 are engaged in the seats 112, 222, the rounded edge of each stud 212 coming into perfect contact with the concave bottom of the seat 112, 122 to articulate the tilting part 200 around the second axis X2 which thus forms the axis of rotation of said tilting part 200.

[0050] Each side 210 of the tilting part 200 has a V-shaped notch 211 which opens towards the front of the switch 10 and the tip 211C of which is located behind the pad 212 (see figures 3 and 6). Each notch 211 is delimited by a V-shaped edge having two sides 211A, 211B inclined relative to each other. According to the example shown, the two sides 211A, 211B of the edge of the notch 211 form between them an angle of the order of 55 degrees but, according to other variants not shown, the value of the angle formed between the sides 211A, 211B can vary in a range between 0 and 60 degrees. The edge of each notch 211 forms a cam surface 211 with a V-shaped profile for a sliding portion belonging to the control key 300; 400 as will be described below.

[0051] In both variants of the switch 10 shown in Figures 1 to 1, the control key 300; 400 is a rigid single-piece part made of molded plastic.

[0052] It comprises a plate 301; 401 whose front face 301A; 401A forms the support surface for a user's finger. This plate 301; 401 has a rectangular shape. In the first version, shown in Figures 1 to 4, the plate 301 has a length L1 of between 70 and 75 millimeters. In the second version, shown in Figures 1 and 5 to 7, the plate 401 has a length L2 of the order of 45 millimeters. The plate 301; 401 of the control key 300; 400 is bordered by a rim having two longitudinal panels 302; 402 and two lateral end panels 303; 403. For aesthetic reasons, here the front face 301A;401A of the plate 301;401 is continuously connected by roundings to the external face of the end side panels 303;403.In each longitudinal panel 302;402 of the edge of the control key 300;400, there is provided a keyhole-shaped opening which opens onto a free edge 302A;402A of said longitudinal panel 302;402. This opening comprises, from said free edge 302A;402A, a flared mouth. 304;404 which communicates with a circular part 306;406 via a bottleneck 305;405. The diameter of the circular portion 306;406 of said openings corresponds, within clearance, to the diameter of the journals 106 of the base 100. As shown in Figures 2, 3, 5 and 6, the control key 300;400 is attached to the front of the base 100 so as to close the front opening of the latter. The keyhole-shaped openings of the control key 300;400 are snapped onto the journals 106 of the base 100 so that the circular portion 306;406 of each opening accommodates a journal 106 to allow the control key 300;400 to tilt around the first axis of rotation XI.The snap-fastening of each opening is carried out by engaging the flared mouth 304;404 on each trunnion 106 and by pressing the control key 300;400 towards the base 100 so that each trunnion 106 passes by force (by elastic deformation of the longitudinal panel 302;402) the bottleneck 305;405 and is housed in the circular part 306;406. Once mounted on the trunnions 106, the control key 300;400 is firmly attached in rotation to the base 100. It cannot be detached from the base 100 without pulling strongly on it. By tilting around the first axis of rotation XI, the control key 300; 400 can take two tilting positions relative to the base 100 (one of which is shown in Figures 2 and 5). In each of its tilting positions, a part of the free edge 302A; 402A of the longitudinal panels 302; 402 of the rim of the control key 300; 400 is placed. against the external sidewalk 103 of the base 100 which, advantageously, limits the angular travel of the control key 300;400.

[0053] According to a remarkable characteristic of the switch 10, as shown in the principle diagrams represented in figures 4 and 7, there is provided, on the one hand, an arm 310; 410 fixedly attached to the control key 300; 400, which extends from the control key 300;400, directly above said first axis of rotation XI, perpendicular to it, in the direction of said tilting part 200 and which comprises a free end 311;411 provided with a sliding surface 312;412, and, on the other hand, the cam surface 211 carried by the tilting part 200, the two sides 211A, 211B of which here form an angle of the order of 55 degrees and on which the sliding surface 312;412 of the free end 311;411 of the arm 310;410 slides when the control key 300;400;400 is tilted around the first axis of rotation XI by a first determined angle to cause the tilting of said tilting part 200 around the second axis of rotation X2 by a second determined angle significantly greater than said first angle.;

[0054] This particularly advantageous arrangement makes it possible to obtain a switch 10 whose control key 300; 400 has a reduced tilting angle of between 3 and 5 degrees and actuates said tilting part 200 so that it tilts through an angle of between 8 and 10 degrees, preferably of the order of 9 degrees to move the movable contact brush between its two switching positions.

[0055] Reducing the tilt angle of the control key 300;400 makes the switch 10 easily operable and more aesthetically pleasing.

[0056] According to the two variants shown in Figures 1 to 7, two parallel arms 310; 410 of the same length are provided, fixedly attached to the control key 300; 400, each arm 310 having a free end 311 provided with a sliding surface 312 cooperating with one of the cam surfaces 211 carried by said tilting part 200.

[0057] As shown in Figures 3 and 6, the arms 310; 410 form a single piece with the control key 300; 400. They extend from the rear face 301B; 401B of the plate 301; 401, perpendicular to the latter. The arms 310; 410 are spaced apart from each other so that they engage in the notches in the sides 210 of the tilting part 200, the sliding surface of the free end 311; 411 of said arms 310; 410 coming into contact with the V-shaped edge of these notches 211. When the control key 300; 400 pivots about said first axis of rotation XI, the sliding surface of the free end 311; 411 of said arms 310; 410 slides on the inclined sides 211A, 211B of the V-shaped edge of the notches and causes the pivoting of said tilting part 200 around said second axis of rotation X2.

[0058] Here, the free end 311;411 of the arms 310;410 of the control key 300;400 is a portion of disk and the sliding surface 312;412 of this free end 311;411 is formed by the edge of this portion of disc. Said sliding surface 312;412 is therefore a portion of cylindrical surface.

[0059] According to the first variant of the switch 10 shown more particularly in FIG. 4, the control key 300 (of length L1 between 70 and 70 millimeters) is capable of tilting through an angle A1 of the order of 3.5 degrees. It comprises arms 310 whose length D1, measured from the first axis of rotation XI (that is to say here from the root of the arms provided on the rear face of the plate) to the free end 311 (more precisely to the center of the disc constituting the free end 311), is approximately 9.5 millimeters. The tilting angle A3 of the driver 200 actuated by the control key 300 is of the order of 9 degrees.

[0060] According to the second variant of the switch 10 shown more particularly in FIG. 7, the control key 400 (of length L2 equal to 45 millimeters) is capable of tilting through an angle A2 of the order of 5 degrees. It comprises arms 410 whose length D2, measured from the first axis of rotation XI (that is to say here from the root of the arms provided on the rear face of the plate) to the free end 411 (more precisely to the center of the disc constituting the free end 411), is approximately 8 millimeters. The tilting angle A4 of the driver 200 actuated by the control key 400 is of the order of 9 degrees.

[0061] In the two variants described above, the free ends 311; 411 of the arms 310; 410 are located in an internal space of the base 100 between the first axis of rotation XI and the second axis of rotation X2.

[0062] Figures 8 to 11 show a second embodiment of a switch 20 according to the invention.

[0063] As shown more particularly in Figure 8, the switch 20 comprises a base 500 made of insulating material, formed of a rear part 510 and a front part 520 assembled together. The rear part 510 is a housing with a bottom and a front opening. This housing houses the electrical elements of the switch 20 as well as a part of the driver 700. The front part 520 is a sort of housing open at the rear and at the front. It is reported in the front opening of said rear part 510. The front opening of said front part 520 is closed by the control key 600 adapted to tilt around a first axis of rotation XI. The front part 520 carries at the rear tabs 521 snapped onto teeth 511 provided projecting on the external face of the rear part 510. The front part 520 has on the outside a peripheral pavement 503 against which the control key 600 bears in its two tilting positions (see figures 10 and 11).

[0064] The switch 20 is here a two-way switch. It comprises two electrical screw terminals B1, B2 from which fixed conductive tabs 1, 2 each carrying a contact grain IA, 2A and a movable brush 4 carrying a contact grain 4A come. The movable brush 4 is pivotally mounted on a yoke 3 belonging to a conductive tab coming from a third electrical screw terminal B3.

[0065] The 700 trainer is a single piece made of molded plastic.

[0066] It comprises a barrel 720 which hooks a part of the movable brush 4. This barrel 720 conventionally houses a spring 5 compressed between the movable brush 4 and the barrel 720 (see figures 9 to 11).

[0067] The driver 700 is mounted in a tilting manner in the base 500. It is adapted to be tilted by the control key 600 between two stable positions to tilt the movable brush 4 between two switching positions shown in FIGS. 10 and 11 where the contact grain 4A of the movable brush 4 is in alternating contact with the contact grains 1A, 2A of the fixed conductive tabs 1, 2.

[0068] The driver 700 comprises, at the front of the barrel 720, a head 710 having an interior housing open towards the control key 600. The bottom of this interior housing is concave (see figures 10 and 11). The head 710 comprises two parallel legs 713 which rise towards the control key 600 from the edge 710A of the front opening of the head 710 of the driver 700. These two legs 713 carry, on two opposite external faces, two pins 712 aligned along a second axis of rotation X2 forming the axis of rotation of the driver 700. The pins 712 are engaged in bearings of the front part 520 of the base 500 and they form the pivoting means of the driver 700.

[0069] As shown in Figures 10 and 11, in the interior housing of the head 710 of the driver 700, two parallel partitions are provided which form, with the concave bottom, a cam surface 711 with a U-shaped profile open towards the front opening of the head 710 of the driver 700. This U-shaped cam surface 711 is intended to cooperate with a part sliding belonging to the control key 600 as will be described below.

[0070] The control key 600 comprises two assembled parts, fixed relative to each other, an external part 610 for the support of a user's finger and an internal part 620, arranged under the external part 610.

[0071] The outer portion 610 is in the form of a large square or rectangular shaped plate and the inner portion 620 is in the form of a small sub-plate also in the form of a square or rectangular shaped centered relative to the outer portion 610.

[0072] The large plate 610 is bordered by a peripheral rim 611. It carries on its rear face tabs 612 snapped into corresponding openings of the sub-plate 620. The sub-plate 620 forms an angle E of between 1 and 2 degrees (preferably equal to 1.75 degrees) with the large plate 610.

[0073] In each of the tilting positions of the control key 600, a part of the free edge of the peripheral rim 611 of the large plate 610 is placed against the external sidewalk 503 of the base 500 which, advantageously, limits the angular travel of the control key 600 (see figures 10 and 11).

[0074] The sub-plate 620 carries on two opposite edges two pins centered on a first axis of rotation XI forming the axis of rotation of the control key 600. The pins are engaged in bearings of the front part 520 of the base 500 and they form the pivoting means of the control key 600.

[0075] The second axis of rotation X2 and the first axis of rotation XI are distinct, coplanar and parallel. The first and second axes XI and X2 belong to the plane BB identified in Figure 8.

[0076] According to a remarkable characteristic of the switch 20, as shown in Figures 10 and 11, there is provided, on the one hand, an arm 630 fixedly attached to the sub-plate 620 of the control key 600, which extends from the sub-plate 620, directly above said first axis of rotation XI, perpendicular to it, in the direction of the driver 700 and which has a free end 631 provided with a sliding surface 632, and, on the other hand, the cam surface 711 carried by the front part 710 of the driver 700, the two sides 711A, 711B of which are parallel (forming a zero angle between them) and on which the sliding surface 632 of the free end 631 of the arm 630 slides when the control key 600 is tilted by a first determined angle to cause the tilting of the driver 700 by a second determined angle significantly greater than said first angle.

[0077] Here too, this particularly advantageous arrangement makes it possible to obtain a switch 20 whose control key 600 has a reduced tilting angle Fl of the order of 3.5 degrees and actuates the driver 700 so that it tilts by an angle of between 8 and 10 degrees, preferably of the order of 9 degrees (more precisely here equal to 8.6 degrees) to move the movable contact brush 4 by an angle of 20 degrees between its two switching positions. The angle Cl identified in FIGS. 10 and 11 is the orientation angle of the driver 700 in each of its two switching positions. This angle Cl has a value of approximately 4.3 degrees so that the driver 700 must travel an angular sector of approximately 8.6 degrees to move from one switching position to the other.

[0078] Reducing the tilt angle of the control key 600 makes the switch 20 easily operable and more aesthetically pleasing.

[0079] According to the example shown in Figures 10 and 11, a single arm 630 is provided which extends from the center of the rear face of the sub-plate 620, perpendicular to it. The arm 630 and the sub-plate 620 are molded and form a single piece. The free end 631 of the arm 630 is shaped into a cylinder which extends on either side of the arm 630 along an axis perpendicular to the longitudinal direction of the arm 630. The sliding surface 632 is thus a cylindrical surface capable of sliding on the faces 711A, 711B of the U-shaped cam surface 711. These faces 711A, 711B are formed by the facing surfaces of the partitions provided in the head 710 of the driver 700.Finally, the length H1 of the arm 630 measured between the first axis of rotation XI (that is to say here from the root of the arm on the rear face of the sub-plate) to the axis of the cylinder forming the free end 631 of the arm 630 is between 8 and 10 millimeters, preferably of the order of 9 millimeters.

[0080] As clearly shown in Figures 10 and 11, the axis of the free end 631 of the arm 630 is parallel to the axes XI and X2. The axis of rotation X2 of the driver 700 (also called the second axis of rotation X2) is located in a space extending between the first axis of rotation XI of the control key 700 and the axis of the free end 631 of the arm 630.

[0081] Of course, various other modifications may also be made to the invention within the scope of the appended claims. In particular, it may be provided that said sliding surface is a spherical surface.

Claims

Claims Switch (10; 20) which comprises a control key (300; 400; 600), accessible to the user, adapted to tilt by a first angle (A1; A2; E) around a first axis of rotation (XI), a tilting part (200; 700) located under the control key, adapted to tilt around a second axis of rotation (X2), distinct from the first axis of rotation, by a second angle (A3; A4) greater than said first angle (A1; A2), an arm (310; 410; 630) fixedly secured to the control key (300; 400; 600), which extends from the control key, directly above said first axis of rotation (XI), perpendicular to it, in the direction of said tilting part (200; 700) and which comprises a free end (311; 411 ;631) provided with a sliding surface (312;412;632), and a cam surface (211;711) carried by the tilting part (200;700), characterized in that the cam surface (211;711) has two sides (211A,211B;711A, 711B) forming an angle between 0 and 60 degrees, on which the sliding surface (312; 412; 632) of the free end (311; 411; 631) of the arm (310; 410; 630) slides when the control key (300; 400; 600) is tilted by said first angle to cause said tilting part (200; 700) to tilt by said second angle. Switch (10; 20) according to claim 1, wherein said sliding surface (312; 412; 632) is a portion of cylindrical or spherical surface. Switch (10; 20) according to one of claims 1 and 2, in which the first tilting angle of the control key (300; 400; 600) is between 3 and 5 degrees while the second tilting angle of said tilting part (200;700) is between 8 and 10 degrees, preferably of the order of 9 degrees. Switch (10) according to claim 3, in which the arm (410) has a length measured from the first axis of rotation (XI) to the free end (411) equal to 8 millimeters for a first tilting angle of the control key (400) equal to 5 degrees. Switch (10; 20) according to claim 3, in which the first tilting angle of the control key (300; 600) is of the order of 3.5 degrees. Switch according to claim 5, in which the arm (310; 630) has a length measured from the first axis of rotation (XI) to the free end (311; 631) equal to 9.5 millimeters. Switch (10) according to one of claims 1 to 6, in which the two sides (211A, 211B) of the cam surface (211) are inclined relative to each other and the cam surface (211) has a V-shaped profile.; 8. Switch (10) according to claim 7, in which the angle formed between the two faces (211A, 211B) of the cam surface (211) is of the order of 55 degrees.

9. Switch (10) according to one of claims 1 to 8, in which two parallel arms (310; 410) of the same length are provided, fixedly attached to the control key (300; 400), each arm (310; 410) comprising a free end (311; 411) provided with a sliding surface (312; 412) cooperating with a cam surface (211) carried by said tilting part (200).

10. Switch (20) according to one of claims 5 and 6, in which the two sides (711A, 711B) of the cam surface (711) are parallel to each other and the cam surface (711) has a U-shaped profile.

11. Switch (20) according to claim 10, in which the control key (600) comprises two assembled parts, fixed relative to each other, an external part (610) for the support of a user's finger and an internal part (620), arranged under the external part, from which said arm (630) extends.

12. Switch (20) according to claim 11, wherein the external part is in the form of a plate (610) and the internal part is in the form of a sub-plate (620) which forms an angle of between 1 and 2 degrees with said plate (610).

13. Switch (20) according to one of claims 11 and 12, in which the external part (610) is snapped onto the internal part (620).

14. Switch (10; 20) according to one of the preceding claims, wherein said tilting part (200; 700) is a driver which drives a movable contact brush between two switching positions.

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