EP0801409A1 - Remote control interrupter - Google Patents

Abstract

The relay has a magnetic circuit (11) including a coil (16) and a movable armature (22) which is rotatable against a spring (33) between a rest position and a working position. The contact element (12) is movable between closed and open positions by a cam (52). The coupling between the armature and the cam consists of a ratchet wheel (53) rotating with the armature, and two pawls (54) formed in diametrically opposed positions on a ring (59) integral with the cam. The ratchet wheel is part of a bearing element (25) with an axial shaft (29) engaging in a hub (30) on the relay casing (10).

Description

The present invention relates generally to remote control switches of the type comprising, in a housing, a magnetic circuit, which comprises a coil and a movable frame and whose movable frame is rotatably mounted between two positions, one at rest, the other working, in response to an electrical impulse applied to the terminals of the coil, elastic return means which permanently urge the movable armature of the magnetic circuit towards its rest position, a cam, which, coaxial with this movable frame, is rotatably mounted step by step, drive means which, acting between this movable frame and this cam, comprise, for driving a pitch of the cam at each passage of the movable frame from its rest position in its working position, a ratchet wheel with which is associated at least one elastically erasable drive pawl, retaining means, which themselves elastically erasable, so nt capable of opposing a retrograde movement of the cam after each advance of one step thereof, and at least one contact member, which, mounted movable between two positions, one closing, the other opening, is under the control of the cam, and which, in practice, controls itself any electrical circuit of use.

A remote control switch of this type is notably described in the French patent which, filed on January 28, 1975 under No 75 02495, was published under No 2 299 717.

In this French patent, the ratchet wheel is integral in rotation with the cam, while the drive pawl which is associated therewith, is integral in rotation with the movable armature of the magnetic circuit.

This arrangement has given and can still give satisfaction.

But it leads in practice to the implementation of a relatively large number of parts, at the expense of costs.

The present invention generally relates to a provision advantageously allowing minimization of the number of parts required.

More specifically, it relates to a remote control of the type concerned characterized in that, unlike the previous arrangement, the ratchet wheel is integral in rotation with the movable armature of the magnetic circuit while the pawl associated drive is integral in rotation with the cam.

This advantageously results in greater ease of production for the parts to be used between the movable armature of the magnetic circuit and the active member.

Indeed, the drive pawl can very simply be carried by a coaxial ring of the ratchet wheel, preferably being in one piece with this ring, and, if desired, this ring can itself advantageously be of in one piece with the cam.

In a preferred embodiment, the retaining means associated with the cam further comprise notches which, very simply, themselves belong to the cam.

In such a case, and independently of the elastic return means associated with the movable armature of the magnetic circuit, the number of parts required between this movable armature and the active member is advantageously reduced to two, namely, on the one hand, a part, here called for simple convenience bearing part, which is locked in rotation on the movable frame and to which the ratchet wheel belongs, and, on the other hand, a part which jointly form the cam and the ring carrying the pawl drive.

• la figure 1 est, avec un arrachement local, une vue en perspective éclatée d'un télérupteur suivant l'invention ;
• la figure 2 reprend, à échelle supérieure, le détail de la figure 1 repéré par un encart II sur cette figure 1 ;
• la figure 3 est, à échelle encore supérieure, une vue partielle en perspective, qui, déduite de celle de la figure 2, se rapporte pour l'essentiel à la pièce à laquelle appartient la bague portant les cliquets d'entraînement mis en oeuvre suivant l'invention ;
• la figure 4 est une vue partielle en coupe axiale de cette pièce, suivant la ligne IV-IV de la figure 2 ;
• la figure 5 est, avec des arrachements locaux, et suivant la flèche V de la figure 1, une vue partielle en plan de l'ensemble du télérupteur suivant l'invention, dont a été cependant retirée l'armature mobile du circuit magnétique, pour la position de repos de cette armature mobile et la position de fermeture de l'organe de contact commandé ;
• la figure 6 est une vue en plan analogue à celle de la figure 5, pour la position de travail de l'armature mobile du circuit magnétique et la position d'ouverture de l'organe de contact ;
• la figure 7 est une vue analogue à celle de la figure 5, pour la position de repos de l'armature mobile du circuit magnétique et la position d'ouverture de l'organe de contact ;
• la figure 8 reprend, à échelle supérieure, le détail de la figure 5 repéré par un encart VIII sur cette figure 5 ;
• la figure 9 reprend, de manière semblable, à échelle supérieure, le détail de la figure 7 repéré par un encart IX sur cette figure 7 ;
• la figure 10 est, à échelle supérieure, une vue partielle en coupe axiale du bout d'arbre dont est solidaire en rotation l'armature mobile du circuit magnétique et de la portion du boîtier avec laquelle ce bout d'arbre est en prise à rotation.

The characteristics and advantages of the invention will become apparent from the description which follows, by way of example, with reference to the appended schematic drawings in which:

• Figure 1 is, with a local cutaway, an exploded perspective view of a remote control switch according to the invention;
• Figure 2 shows, on a larger scale, the detail of Figure 1 identified by an insert II in this Figure 1;
• Figure 3 is, on a still larger scale, a partial perspective view, which, deduced from that of Figure 2, essentially relates to the part to which the ring carrying the drive pawls used according to the invention belongs;
• Figure 4 is a partial view in axial section of this part, along the line IV-IV of Figure 2;
• FIG. 5 is, with local cutouts, and along arrow V of FIG. 1, a partial plan view of the assembly of the remote control switch according to the invention, from which the movable armature of the magnetic circuit has been removed, for the rest position of this movable frame and the closed position of the controlled contact member;
• Figure 6 is a plan view similar to that of Figure 5, for the working position of the movable armature of the magnetic circuit and the open position of the contact member;
• Figure 7 is a view similar to that of Figure 5, for the rest position of the movable armature of the magnetic circuit and the open position of the contact member;
• Figure 8 shows, on a larger scale, the detail of Figure 5 identified by an insert VIII in this Figure 5;
• Figure 9 shows, similarly, on a larger scale, the detail of Figure 7 identified by an insert IX in this Figure 7;
• Figure 10 is, on a larger scale, a partial view in axial section of the end of the shaft which is integral in rotation with the movable armature of the magnetic circuit and of the portion of the housing with which this end of the shaft is in rotation .

As illustrated in these figures, and according to provisions of the same type as those described in French patent No 75 02 495 mentioned above, the remote control switch according to the invention comprises, in the embodiment shown, a housing 10 consisting of two parts suitably secured to each other, namely, a lower part 10A, forming the housing body, and an upper part 10B, forming a cover.

In a manner also known per se, the remote control switch according to the invention comprises, overall, in this housing 10, a magnetic circuit 11, and, controlled by this magnetic circuit 11, according to methods described in more detail later, at least one member of contact 12.

The magnetic circuit 11 comprises, first of all, a fixed yoke 13, in the general shape of U.

By its middle part 14, this fixed yoke 13 is engaged axially in a carcass 15 on which a coil 16 is wound.

By its legs 17, it is wedged in the housing 10, these legs 17 each being respectively engaged with clearances 18 provided for this purpose in the lower part 10A thereof.

By the ends, not shown, of the wire which constitutes it, the coil 16 is connected to two connection terminals 20, housed in the lower part 10A of the housing 10, along two opposite edges thereof.

The magnetic circuit 11 further comprises a movable frame 22 which, like the fixed yoke 13, is also in the general shape of a U.

Its middle part 23 extends in a plane parallel to that in which the middle part 14 of the fixed cylinder head 13 extends, and its legs 24 extend on the same side as the legs 17 of the latter.

In practice, this movable armature 22 is rotatably mounted around an axis perpendicular to its middle part 23, between two positions, one at rest, the other at work, in response to an electrical pulse applied to the terminals of the coil. 16, and therefore at the connection terminals 20.

For the rotary mounting of the movable armature 22, there is provided, in the embodiment shown, a part 25, called here for simple convenience bearing part, which, distinct from this movable armature 22, is locked in rotation thereon this and it is used in practice as a support.

While the movable frame 22 is, of course, made of metal, like the fixed yoke 13, the bearing part 25 is itself made of synthetic material.

In the embodiment shown, it comprises an elongated bar 26, by which it is attached, and secured, to the middle part 23 of the movable frame 22.

In the vicinity of the ends of this elongated bar 26, and for reasons which will appear later, the bearing part 25 carries, projecting, two lateral bosses 28, which extend in the same direction as the legs 24 of the movable frame 22 .

In the middle zone of the elongated bar 26, the bearing part 25 further carries, axially, a shaft end 29 by which it is in rotation with a hub 30 integral with the housing 10.

In practice, this end of the shaft 29 projects axially at the center of a cylindrical boss 31 which itself projects from the elongated bar 26.

As a corollary, the hub 30 projects from the bottom 32 of the lower part 10A of the housing 10, in the central zone of this bottom 32.

By means of the bearing part 25, the movable armature 22 is subjected to elastic return means 33 which urge it permanently in the direction of its rest position.

In the embodiment shown, these elastic return means 33 consist of a bending spring comprising, on the one hand, a middle bending part 34, which is engaged on the cylindrical boss 31 of the bearing part 25, and, on the other hand, two branches 36, one of which is hooked on one of its lateral bosses 28 while the other is engaged with a fork 37 provided for this purpose projecting from the bottom 32 of the lower part 10A of the housing 10.

In practice, for undifferentiated mounting in one direction or the other, two forks 37 are provided on this bottom 32, on either side of the hub 30.

In its rest position, which is that shown in FIGS. 5 and 7, the movable armature 22 in practice bears on a stop 38 provided for this purpose in the lower part 10A of the housing 10.

It can be, if desired, a damping stopper of elastic material.

For this rest position, the movable frame 22 extends largely obliquely relative to the legs 17 of the fixed cylinder head 13.

In the embodiment shown, a single contact member 12 is provided, and the latter is mounted movable between two positions, one for closing, the other for opening, in the lower part 10A of the housing 10.

According to provisions of the type described in French patent No 75 02495 mentioned above, this contact member 12 comprises a contact strip 40, which is carried by a lever 41 pivotally mounted on an axis 42 provided for this purpose. projection on the bottom 32 of the lower part 10A of the housing 10, and by which it intervenes between two fixed contacts 44 each connected respectively to two connection terminals 45 housed next to the connection terminals 20 in this lower part 10A of the housing 10.

While the connection terminals 20 form the input or control terminals of the remote control switch according to the invention, the connection terminals 45 form the output or power terminals.

These connection terminals 45 are in fact intended to be interposed in any use circuit, and, for example, in any power circuit.

In the embodiment shown, the contact member 12 is subjected to elastic return means 46 which urge it permanently in the direction of its closed position, that is to say in the direction of the position for which, as shown in Figure 5, the contact strip 40 which it comprises is applied against one and the other of the fixed contacts 44 and thus establishes an electrical connection between them.

In the embodiment shown, these elastic return means 46 consist of a compression spring which intervenes between, on the one hand, a flange 48 projecting from the bottom 32 of the lower part 10A of the housing 10, and, on the other hand, an arm 49 of the lever 41.

To allow undifferentiated mounting of the contact member 12 on one side or the other of the hub 30, as well as to allow if desired the simultaneous control of two contact members 12, the lower part 10A of the housing 10 comprises, in duplicate, symmetrically, all the necessary constituents, and in particular two axes 42 and two flanges 48.

In other words, the axis of the hub 30 constitutes an axis of symmetry for this lower part 10A of the housing 10.

The foregoing arrangements are, for the most part, well known in themselves, or in the art, and will therefore not be described in more detail here.

It will suffice to indicate that, in the embodiment shown, the upper part 10B of the housing 10 has wells 50 giving access to the tightening screws of the connection terminals 20 and 45, however that, for the engagement of electrical conductors in these, the lower part 10A of this housing 10 has laterally openings 51.

In a manner also known per se, the contact member 12 is under the control of a cam 52, which, coaxial with the movable armature 22 of the magnetic circuit 11, is rotatably mounted step by step, with, on the one hand , drive means, which, acting between this movable frame 22 and this cam 52, comprise, for driving a pitch of the cam 52 at each passage of the movable frame 22 from its rest position to its working position, a ratchet wheel 53 with which is associated an elastically erasable drive pawl 54, and, on the other hand, retaining means, detailed below, which, themselves elastically erasable, are capable of to oppose a retrograde movement of the cam 52 after each advance of one step thereof.

According to the invention, the ratchet wheel 53 is integral in rotation with the movable frame 22 of the magnetic circuit 11 while the drive pawl 54 which is associated with it is integral in rotation with the cam 52.

In practice, in the embodiment shown, the ratchet wheel 53 is in one piece with the bearing part 25.

In other words, it forms a single piece with it, having come from molding with it.

In practice, also, the ratchet wheel 53 protrudes from the cylindrical boss 31 of this bearing part 25, surrounding the end of the shaft 29 at the root thereof.

In a manner known per se, the ratchet wheel 53 comprises, at its periphery, a plurality of teeth 56, which, all in the same direction, comprise, in turning back relative to each other, a progressive flank 57 and a steep flank 58.

As a corollary, the drive pawl 54 associated with this ratchet wheel 53 is carried by a ring 59, which, coaxial with the cam 52, and integral in rotation with the latter, surrounds the ratchet wheel 53.

In the embodiment shown, the ring 59 is integral with the cam 52.

In other words, it forms therewith a single piece 60, having come from molding with it.

In addition, in this embodiment, the ring 59 carries, in diametrically opposite positions relative to one another, two drive pawls 54.

In practice, these drive pawls 54 are themselves in one piece with the ring 59.

They extend obliquely, and cantilevered, from the internal periphery of this ring 59, their root 61, that is to say the part by which they are connected to the ring 59, acting at the bottom a lobe 62, as a thimble, that the ring 59 forms locally for each of them.

In practice, the drive pawls 54 are identical to each other.

In a manner known per se, each of them comprises, obliquely, a flank 63 by which it is capable of engaging with a tooth 56 of the ratchet wheel 53, and, more precisely, with the steep flank 58 of such a tooth 56.

According to the invention, this flank 63 intervenes at the end of the free end 64 of such a drive pawl 54, and, relative to this flank 63, this drive pawl 54 extends entirely from a same side of the tooth 56 of the ratchet wheel 53 with which it cooperates.

In the embodiment shown, the drive pawls 54 extend in a substantially rectilinear manner from their root 61 to their free end 64.

For its action on the contact member 12, the cam 52 comprises at least one boss 68, which extends generally radially relative to the axis of the hub 30, and, as a corollary, the contact member 12 comprises, for the action of the cam 52, a finger 69, which, in practice, projects from its lever 41, substantially perpendicular to the contact strip 40 which the latter carries.

For progressive action of the cam 52, the finger 69 of the contact member 12 is brought down by a chamfer 70.

In practice, the cam 52 has, regularly distributed peripherally, and therefore, generally in a cross, four bosses 68, two of which, arranged in diametrically opposite positions relative to each other, are each respectively in continuity with the lobes 62 of ring 59.

In practice, also, the ring 59 has, overall, a height greater than that of the other two bosses 68 of the cam 52, and the drive pawls 54 which it carries intervene on the side opposite to these.

In the embodiment shown, the retaining means associated with the cam 52 comprise, on the one hand, a projection 71 secured to the contact member 12, and, on the other hand, at least one notch 72, 72 ' , which is integral in rotation with the cam 52, and with which the projection 71 of the contact member 12 is able to cooperate in engagement.

In practice, the projection 71 is formed by the free end, duly pointed for this purpose, of the finger 69 of the contact member 12, and the corresponding notch 72, 72 ′ belongs to the boss 68 of the cam 52.

More specifically, each of the bosses 68 of the cam 52 comprises, for cooperation with the projection 71 of the contact member 12, two notches 72, 72 ′, one of which acts on its crest part, that is to say say on its part farthest from the axis of this cam 52, the other which intervenes at its base, that is to say on its part closest to this axis.

Each of the notches 72, 72 ′ extends along generatrices of the cam 52.

For the bosses 68 thereof which are in continuity with the lobes 62 of the ring 59, the notch 72 also extends over the entire height of this ring 59, for simple reasons of ease of production.

As can be seen in FIG. 4, the part 60 formed jointly by the cam 52 and the ring 59 has, internally, over part of its height from its base, that is to say from the base of the cam 52, a cylindrical seat 73, which is in practice fragmented into two half-bearing diametrically opposite one with respect to the other, alternating with the lobes 62 of the ring 59, and which is generally complementary of the hub 30.

In practice, this cylindrical bearing surface 73 extends in height up to angled returns 74 which this part 60 presents, jointly, projecting inwards, level with the drive pawls 54, and alternating with those -this.

During assembly, the part 60 is engaged by its cylindrical bearing 73 on the hub 30, and, after positioning of the bending spring constituting the elastic return means 33 of the movable frame 22 on the cylindrical boss 31 of the bearing part 25, the assembly constituted by this bearing part 25 and this movable frame 22 is engaged, by the end of the shaft 29, in the hub 30.

The part 60 is then taken up by its returns at right angles 74 between the hub 30 and the cylindrical boss 31 of the bearing part 25, with sufficient play to be able to pivot both relative to this hub 30 and relative to this bearing part 25 .

At the same time, the ratchet wheel 53 carried by the bearing part 25 is level with the drive pawls 54 carried by the ring 59 belonging to this part 60.

These drive pawls 54 are therefore engaged with two teeth 56 of the ratchet wheel 53 diametrically opposite one with respect to the other.

The axial retention of the assembly is also ensured by stacking with the fixed yoke 13, or, more precisely, with the part that, together with this fixed yoke 13, the carcass 15 and the coil 16.

It will first be assumed that, for the rest position of the movable armature 22 of the magnetic circuit 11, the contact member 12 is in the closed position, as shown in FIG. 5.

For this rest position, the projection 71 formed by the finger 69 of the contact member 12 is engaged with a notch 72 ′ of the cam 52, as is better visible in FIG. 8.

If, through the connection terminals 20, an electrical pulse is applied to the terminals of the coil 16 of the magnetic circuit 11, the movable armature 22 passes from its rest position to a working position, for which, despite the tendency that it then has to align with the legs 17 of the fixed cylinder head 13 at equilibrium, it slightly exceeds this alignment position by inertia, as shown in FIG. 6.

This is all the more so since, in order to increase the corresponding angular travel, the legs 17 of the fixed cylinder head 13 each have laterally, but in opposite positions with respect to each other, in the embodiment shown, a clearance 39, figure 1, of which there it follows that they are generally offset from each other.

In its rotation, which takes place in the direction of arrow F1 in FIG. 5, the movable armature 22 drives the cam 52, through, successively, the ratchet wheel 53 and the drive pawls 54, the ratchet wheel 53 acting indeed then in thrust on the drive pawls 54, and these in turn ensuring the rotational drive of the ring 59 of which the cam 52 is integral.

This cam 52 therefore advances angularly by one step, equal in this case to an eighth of a turn.

In doing so, it causes, by its boss 68 immediately upstream of the notch 72 ′ by which it was hitherto engaged with the projection 71 of the finger 69 of the contact member 12, the passage of this contact member 12 from its closed position to its open position, for which, as shown in FIG. 6, the contact strip 40 which it carries is spaced from the fixed contacts 44.

At the same time, the retaining means temporarily constituted by the notch 72 ′ and the projection 71 are elastically erased, until, at the end of the advance of one step of the cam 52, the projection 71 comes into taken with the next notch 72 thereof, thereby reconstituting new retaining means for it.

Any retrograde movement of the cam 52 is thus prevented.

When the electrical pulse previously applied to the connection terminals 20 comes to an end, the movable armature 22 of the magnetic circuit 11 returns by itself to its initial rest position, under the sole stress of the bending spring constituting its elastic means 33, following a retrograde movement shown diagrammatically by the arrow F2 in FIG. 7.

The cam 52 finding itself jointly retained in the angular position which is its own, each of the drive pawls 54 fades elastically as the tooth 56 of the ratchet wheel 53 passes, which then scrolls to its right, all staying in contact with this ratchet wheel 53.

Jointly, under the control of the cam 52, the contact member 12 itself remains in the closed position.

On the next electrical impulse, the cam 52 angularly advances a new pitch, which allows the contact member 12 to return by itself to the closed position, under the sole stress of the compression spring constituting its means return bands 46.

As will be noted, this compression spring ensures, at the same time, by itself, on the one hand, the contact pressure to which the contact member 12 is subjected when it is in the closed position, and, on the other hand, the retaining pressure allowing the projection 71 formed by the finger 69 of this contact member 12 to cooperate in engagement with one or other of the notches 72, 72 ′ of the cam 52.

In the alternative embodiment shown in FIG. 10, the end of the shaft 29 carried by the bearing part 25 is, at its free end, fragmented by a slot 75 into at least two elastically deformable fingers 76, which, for its snapping onto the housing 10, and, precisely, on the lower part 10A of this housing 10, at the base of the hub 30, are each shaped as a hook.

Thus, the movable armature 22 of the magnetic circuit 11 constitutes, with the bearing part 25, the bending spring forming the elastic return means 33, the part 60 formed jointly by the cam 52 and the ring 59, and the lower part 10A of the housing 10, a unitary sub-assembly, which is likely to advantageously facilitate the remaining mounting.

Of course, the present invention is not limited to the embodiments described and shown, but encompasses any variant and / or combination of their various elements.

In particular, the ring carrying the drive pawls could constitute a part which, distinct from the cam, would simply be joined in rotation to the latter.

Likewise, the notches that comprise the retaining means associated with the cam could belong to a part which, distinct from this cam, would also simply be joined in rotation to the latter.

Claims (14)

Type of remote control comprising, in a housing (10), a magnetic circuit (11), which comprises a coil (16) and a movable armature (22) and whose movable armature (22) is rotatably mounted between two positions, l 'one of rest, the other of work, in response to an electrical impulse applied to the terminals of the coil (16), elastic return means (33), which permanently stress the movable armature (22) of the magnetic circuit (11) in the direction of its rest position, a cam (52), which, coaxial with said movable frame (22), is rotatably mounted step by step, drive means, which, acting between said movable frame (22 ) and said cam (52) comprise, for driving a step of the cam (52) at each passage of the movable armature (22) from its rest position to its working position, a ratchet wheel (53) with which is associated at least one elastically erasable drive pawl (54), retaining means, which themselves astatically erasable, are capable of opposing a retrograde movement of the cam (52) after each advance of one step of the latter, and at least one contact member (12), which, mounted movable between two positions, one closing, the other opening, is under the control of said cam (52), characterized in that the ratchet wheel (53) is rotatably integral with the movable armature (22) of the magnetic circuit (11) while the drive pawl (54) associated therewith is integral in rotation with the cam (52). Remote control switch according to claim 1, characterized in that the ratchet wheel (53) is in one piece with a part (25), called here simply for the convenience of a bearing part, which, distinct from the movable armature (22) of the magnetic circuit (11), is locked in rotation thereon. Remote control switch according to claim 2, characterized in that the bearing part (25) carries axially a shaft end (29) by which it is in rotation with a hub (30) integral with the housing (10). Remote control switch according to claim 3, characterized in that, at its free end, the shaft end (29) which carries the bearing part (25) is fragmented into at least two elastically deformable fingers (76), which, for its snap-fastening on the housing (10), are each shaped as a hook. Remote control switch according to any one of Claims 1 to 4, characterized in that the drive pawl (54) is carried by a ring (59) which, coaxial with the cam (52), and integral in rotation with this- ci, surrounds the ratchet wheel (53). Remote control switch according to claim 5, characterized in that, the drive pawl (54) comprising a flank (63) by which it is capable of engaging with a tooth (56) of the ratchet wheel (53), said flank (63) intervenes at the end of its free end (64), and it extends entirely on the same side of said tooth (56) of the ratchet wheel (53) relative to said flank (63). Remote control switch according to any one of Claims 5 to 6, characterized in that, from its root (61) to its free end (64), the drive pawl (54) extends in a substantially rectilinear manner. Remote control switch according to claim 7, characterized in that, the drive pawl (54) extending obliquely from the internal periphery of the ring (59) which carries it, its root (61) intervenes at the bottom of a lobe (62), as a thermowell, that locally forms this ring (59). Remote control switch according to any one of Claims 5 to 8, characterized in that the drive pawl (54) is integral with the ring (59) which carries it. Remote control switch according to any one of Claims 5 to 9, characterized in that the ring (59) carrying the drive pawl (54) is integral with the cam (52). Remote control switch according to any one of Claims 5 to 10, characterized in that the ring (59) carries, in diametrically opposite positions with respect to each other, two drive pawls (54). Remote control switch according to any one of Claims 1 to 11, characterized in that the retaining means associated with the cam (52) comprise, on the one hand, a projection (71) integral with the contact member (12), and, on the other hand, at least one notch (72, 72 '), which is integral in rotation with said cam (52), and with which said projection (71) is able to cooperate in engagement. Remote control switch according to claim 12, characterized in that, the cam (52) comprising, for its action on the contact member (12), at least one boss (68), and said contact member (12) comprising, as a corollary , for the action of the cam (52), a finger (69), the projection (71) of the retaining means is formed by the free end of said finger (69), and the corresponding notch (72, 72 ') belongs to the boss (68) of the cam (52). Remote control switch according to claim 13, characterized in that the boss (68) of the cam (52) comprises two notches (72, 72 '), one which acts on its part farthest from the axis of this cam ( 52), the other which intervenes on its part closest to this axis.

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