Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
  • H01H15/02—Details
  • H01H15/06—Movable parts; Contacts mounted thereon
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
  • H01H39/006—Opening by severing a conductor
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
  • H01H39/004—Closing switches

Definitions

• the present invention relates to an electrical switch. More particularly, the invention relates to an electrical switch said "sliding drawer”, including an electrical switch of the type comprising a hollow body defining a cavity, an actuator formed in this cavity, a sliding drawer mounted in the cavity downstream of the actuator and having at least one conductive portion, and at least two primary electrical conductive pads installed in the thickness of the hollow body and opening laterally into the cavity, the conductive portion of the sliding drawer and the two primary electrical conductive pads being electrically connected between they when the sliding drawer is in a first position, thus closing a first electrical circuit, and the sliding drawer being adapted, under the effect of the operation of the actuator, to move from its first position to a second position in which at least one of said primary electrical conductive pads is no longer connected electrically to said conductive portion of the sliding drawer.
• an electrical switch of the type comprising a hollow body defining a cavity, an actuator formed in this cavity, a sliding drawer mounted in the cavity downstream of the actuator and having at least one conductive portion, and at least two primary electrical conductive
• the electrical switch object of this disclosure can be used as a circuit breaker or as a switch, according to the embodiments. It is particularly suitable for electrical circuits with very high current.
• the document FR 2,788,165 describes an example of an electrical switch of the aforementioned type, in which electrical conductive pads passing through the thickness of the hollow body are clamped against the conductive part of a slide mounted movably inside the hollow body, by screwing.
• This connection by screwing does not ensure sufficient reliability of the electrical contacts between the movable drawer and the conductive pads.
• the Screw connection can loosen, causing false contacts, arcing and other parasitic phenomena.
• An object of the present invention is to provide an electrical switch without the disadvantages mentioned above.
• an object of the present invention is to provide an electrical switch switch, can be assembled very simply, acting in a very short time, and providing reliable electrical connections.
• a switch of the aforementioned type comprising a hollow body delimiting a cavity, an actuator formed in said cavity, a sliding drawer mounted in said cavity downstream of said actuator and having at least one conductive portion, a first and a second electrical conductive pad forming a first pair, and a downstream electrical conductive pad disposed downstream of said first pair, wherein said electrical conductive pads are installed in the thickness of the hollow body and open laterally in the cavity, in which the conductive portion of the sliding drawer and the two electrical conductive pads of the first pair are electrically connected to each other when the sliding drawer is in a first position, thus closing a first electrical circuit, in which the sliding drawer is able to move from his first position to a second position under the effect of the operation of the actuator, wherein the conductive portion of the sliding spool comprises a first protuberance located upstream of the first electrical conductive pad of the first pair, and a second protuberance located upstream of the electrical conductive pad downstream, and wherein,
• this objective is achieved by means of an electrical switch of the aforementioned type, in which the connection between the conductive portion of the sliding drawer and the two primary electrical conductive pads is a permanent electrical breakable joint constituted by a weld.
• this objective is also achieved by means of an electrical switch of the aforementioned type, in which the connection between the conductive portion of the sliding drawer and the two electrical conductive pads is a permanent electric breakable joint constituted by a solder.
• the electrical conductive pads are electrically connected to each other, thereby closing a first electrical circuit. In this position, the closure of this first electrical circuit is provided by reliable electrical contacts.
• the connection between the primary electrical conductive pads and the conductive portion of the sliding drawer is a permanent electrical connection, the electrical contact between these elements is ensured even in the case where the electrical switch is subjected to vibration or shock. The undesirable phenomena of the type fau contacts, losses by joule effect, electric arcs, etc. are avoided.
• the switch has a circuit breaker function; When, under the effect of the actuator, the sliding drawer passes from its first to its second position, at least one of the pads is no longer electrically connected to the conductive portion of the sliding drawer. The electrical connection between the two primary electrical conductive pads is broken, and the first electrical circuit is open.
• solder like the solder, are inexpensive to achieve.
• Another object of the present invention is to provide an electrical switch that can be assembled very simply, and allowing a very fast breaking of the electrical connections and therefore actuation in a very short time. According to an embodiment of the present invention, this objective is achieved by means of an electrical switch of the aforementioned type, in which the junction facet of at least one electrical conductive pad and the corresponding junction facet of the diverging conductive portion. downstream.
• each junction facet of each primary electrical conductive pad and the corresponding junction facet of the conductive portion diverges downstream.
• Such a configuration allows the sliding drawer to immediately disengage the primary electrical conductive pads, without parasitic friction, when it passes from its first to its second position. It ensures a reliable break of the first electrical circuit connecting the electrical conductive pads, and thus avoids arcing.
• primary electrical conductor pads means the electrical conductive pads which are connected to the conductive portion of the sliding drawer when it is in its first position, that is to say when the electric switch is in its initial state.
• FIGS. 1 and 2 are side sectional views of an electrical switch illustrating a first embodiment of the invention, respectively in its first and in its second position;
• FIG. 3 is a cross-sectional view along III-III of the electrical switch of Figure 1;
• - Figure 4 is an alternative embodiment of the sliding drawer
• - Figures 5 and 6 are side sectional views of an electrical switch according to a third embodiment, respectively in its first and in its second position;
• FIGS. 7 and 8 are side sectional views of an electrical switch according to a fourth embodiment of the invention, respectively in its first and in its second position;
• FIGS. 9 to 11 are side sectional views of an electrical switch according to a variant of the fourth embodiment of the invention, respectively in its first position, in an intermediate position and in its second position;
• FIGS. 12 to 14 are sectional views of an electrical switch according to another variant of the fourth embodiment of the invention, respectively in its first position, in an intermediate position and in its second position;
• FIGS. 15 and 16 illustrate an alternative embodiment of the third embodiment of the invention illustrated in FIGS. 5 and 6.
• the electrical switch according to the invention comprises a hollow body 12 delimiting an internal cavity 14 of circular section, closed at its lower end 14b by a bottom wall 15 and partially filled, in its upper part, with
• the cavity 14 may obviously have a rectangular cross section or any other suitable form.
• an axial direction is a direction parallel to the main axis X of the cavity 14 of the hollow body 12.
• a radial direction is a direction perpendicular to the main axis X of the cavity 14 and intersecting this axis.
• the adjectives and adverbs axial, radial, axially and radially are used with reference to the aforementioned axial and radial directions.
• an axial plane is a plane containing the main axis X of the cavity 14 and a radial plane is a plane perpendicular to this axis.
• an axial section is a section defined in an axial plane, and a radial section is a section defined in a radial plane.
• upstream and downstream terms are defined with respect to the direction of the X axis, which corresponds to the direction of movement, inside the cavity 14, of the sliding drawer 18 which will be defined in the following.
• the electrical switch comprises a pyrotechnic gas generator 16 (for example a micro gas generator and its pyrotechnic initiator or a pyrotechnic initiator according to the amount of gas to be supplied to operate the switch) which closes the cavity 14 at its level. upper end 14a.
• a pyrotechnic gas generator 16 for example a micro gas generator and its pyrotechnic initiator or a pyrotechnic initiator according to the amount of gas to be supplied to operate the switch
• the electric switch 10 is therefore single operation.
• electrical conductive pads are installed in the thickness of the hollow body and open laterally into the cavity 14. Each of these conductive pads comprises a junction facet directed towards the inside of the cavity 14.
• a sliding slide 18, comprising a conductive portion 19, is mounted in the cavity 14 downstream of the pyrotechnic gas generator 16.
• the conductive portion 19 of this slide 18 is initially connected to at least two primary electrical conductive pads closing a first electrical circuit .
• the slide 18 Upstream of its conductive portion 19, the slide 18 includes a non-conductive portion 24, at least one portion 24b has a section complementary to that of the cavity 14 and forms a piston adapted to slide inside the sleeve 13 according to the axial direction X.
• the conductive portion 19 is bonded to the non-conductive portion 24.
• the conductive portion 19 and the piston 24 are independent of one another.
• a gas expansion chamber 27 is formed between the pyrotechnic gas generator 16 and the piston 24.
• the piston 24 is provided, on its periphery, with at least one groove capable of receiving an O-ring seal 25, ensuring the seal between the gas expansion chamber 27 and the remainder of the cavity 14.
• a sealing means of the gas expansion chamber may for example be obtained by injecting, in an annular groove of the piston 24, a plastic material. more malleable than the one used to make the piston.
• a sealing means may also consist of a succession of baffles made on the piston 24, and serving to reduce the flow velocity of the leakage gases passing in the gap between the piston 24 and the inner wall of the cavity 14.
• a leakage orifice for the gases can be provided in the downstream part of the cavity 14, for example in its bottom wall 15.
• a hollow body 12 made of polymer reinforced by an injection process has sufficient mechanical strength.
• the hollow body 12 may be reinforced by a metal frame.
• the metal frame may surround the hollow body 12 to form a rigid protective shell.
• the metal armature can be directly inserted into the material at the time of injection.
• the pyrotechnic gas generator 16 and the electrical conductive pads must generally be mounted in insulated inserts.
• the electrical switch comprises, in the various embodiments presented, a pyrotechnic gas generator 16. It should be noted that this example is not limiting and any other device or actuator capable of exerting sufficient effort on the upper part of the sliding drawer 18 for breaking the connection between the electrical conductive pads and the drawer 18, may be used. As an example, it will be possible to use actuators with mechanical or electrical energy.
• FIGS 1 and 2 there is shown an electrical switch 10 according to a first embodiment of the present invention.
• the electrical switch 10 has a circuit breaker function for a first electrical circuit connecting two electrical conductive pads 20a, 20b opening into the cavity 14.
• the two electrical conductive pads 20a, 20b are arranged on the same radial axis AA, and each comprise a junction facet 26a, 26b, defined in a plane perpendicular to the axis AA and facing inwards of the cavity 14.
• the sliding drawer 18 comprises, in the example, a non-conductive portion (made of insulating material) provided with a first section 24b having a section complementary to that of the cavity 14 and forming a piston, and, downstream of this first section 24b, of a second section 24a of axial length L2.
• the sliding drawer Downstream of this non-conductive portion 24, the sliding drawer further comprises a conductive portion 19 which, in the example, has a length (taken in the axial direction X) substantially equal to the length L1 of the connecting facets 26a, 26b of the conductive pads 20a, 20b.
• junction facet 26a of the first electrical conductive pad 20a is connected to a corresponding junction facet 28a of the conductive portion 19 by a weld 22a, for example a tin-copper solder.
• junction facet 26b of the second primary electrical conductive pad 20b is connected to a corresponding junction facet 28b of the conductive portion 19 by a weld 22b, for example a tin-copper solder.
• the welds 22a, 22b can withstand external stresses such as vibration, shock, etc. and thus ensure reliable electrical contacts.
• the welds 22a, 22b are subjected to increasingly large shear forces.
• the forces due to the gas pressure exceed the shear strength forces of the welded connections 22a, 22b, the welds 22a, 22b break, releasing the sliding drawer 18 which then moves downstream, until abut against the bottom wall of the cavity 14.
• the path traveled by the sliding drawer 18 between its first and second positions is greater than the axial length L1 of the conductive portion 19.
• the joining facets 28a, 28b and the whole of the conductive portion 19 are located downstream of the connecting facets 26a, 26b of the primary electrical conductor pads 20a, 20b.
• the joining facets 26a, 26b are then located facing the insulating portion 24 of the sliding drawer, so that the electrical connection between the pads 20a, 20b is broken and the first electrical circuit is open.
• the conductive portion 19 may extend upstream of the electrical conductive pads 20a, 20b.
• the conductive portion further has a recess upstream of each of the electrical conductive pads, whereby, after actuation of the pyrotechnic gas generator 16 and displacement of the slide 18, each primary electrical conductive pad 20a, 20b is found positioned opposite a recess, and the primary electrical circuit is open.
• the conductive portion 19 has a substantially parallelepiped shape. Its axial section, rectangular, is shown in Figure 3.
• the connecting facets 28a, 28b of the conductive portion 19 of the sliding drawer 18 are planar, as are the corresponding facets 26a, 26b of the primary electrical conductor pads 20a, 20b .
• the conductive portion 19 may have a circular axial section, as illustrated in FIG. 4.
• its joining facets 28a, 28b have a convex shape and the corresponding connecting facets 26a, 26b of the electrical conductive pads 20a, 20b have a corresponding concave shape.
• the junction facets of the conductive portion 19 and the primary electrical conductive pads 20a, 20b are connected by a solder. All the characteristics, remarks, variants indicated above in connection with the first embodiment of the invention remain valid for this second embodiment and are therefore not repeated here.
• the electrical switch 100 has a circuit breaker function for a first electrical circuit connecting two electrical conductive pads 20a, 20b opening into the cavity 14.
• two electrical conductive pads 20a, 20b protrude laterally inside the cavity 14. These pads are arranged along the same radial axis AA, and each comprise a junction facet 26a, 26b facing inwards of the cavity 14.
• a sliding drawer 18 is mounted directly downstream of the pyrotechnic gas generator 16.
• This drawer comprises, in the example, a non-conductive portion (made of insulating material) of complementary section to that of the cavity 14 and forming a piston, extended, downstream, by a conductive portion 19 of axial length L8 greater than the length L1 of the connecting facets of the electrical conductive pads 20a, 20b.
• junction facets 26a, 26b of the electrical conductive pads 20a, 20b and corresponding ones 28a, 28b of the sliding drawer 18 diverge downstream.
• the conductive portion 19 further comprises a recess, 23a, 23b extending over an axial length 13.
• the length L3 is chosen greater than the length L1 of the conductive pads , and more generally so that, after actuation of the pyrotechnic gas generator 16 and displacement of the slide 18, each electrical conductive pad 20a, 20b is found positioned opposite a recess 23a, 23b.
• the sliding drawer 18 disengages immediately from the two primary electrical conductor pads 20a, 20b , without parasitic friction, during its movement inside the cavity 14.
• the electrical connection between the two conductive pads is broken very reliably and a cut free of the electrical circuit is obtained.
• the breaking of the electrical connection between the primary electrical conductive pads 20a, 20b and the conductive portion 19, is obtained for a minimum path of the drawer 18 in the direction of sliding X.
• the entire portion of the sliding drawer 18 located upstream of the connecting facets 28a, 28b may be made of an insulating material.
• the sliding drawer 18 does not necessarily include recesses 23a, 23b upstream of the connecting facets 28a, 28b.
• an insulating strip is simply provided on each face of the sliding drawer 18 situated upstream of a junction facet 28a, 28b (for example, an insulating material fills the space formed by a recess 23a, 23b, see Figures 15 and 16).
• junction facets 26a, 26b, 28a, 28b of the primary electrical conductive pads 20a, 20b and the sliding drawer 18 have, in radial section, a rectilinear section.
• these facets may however have non-rectilinear sections, if, in general, they diverge downstream.
• the junctions between the electrical conductive pads 20a, 20b and the conductive portion 19 may be constituted by any type of breakable permanent electrical connection.
• these junctions may be formed by solders, or welds.
• the primary electrical conductive pads 20a, 20b and the conductive portion 19 of the sliding drawer 18 can be made in one piece, but are delimited by breaking primers.
• the primary electrical conductive pads can be biased in contact with the conductive portion by resilient biasing means, for example a spring.
• the sliding drawer 18 advantageously comprises, upstream of each junction facet 28a, 28b of the conductive portion 19, an insulating portion 50a, 50b.
• the primary electrical conductor pads 20a, 20b biased towards the drawer slidable 18 by the springs 52a, 52b, come into contact with these insulating portions 50a, 50b.
• the electrical connection between the primary electrical conductor pads 20a, 20b is thus broken reliably despite the fact that these pads are biased towards the sliding drawer 18 by the springs 52a, 52b.
• a strip of insulating material 50a, 50b is simply attached to the sliding drawer 18 upstream of each junction facet 28a, 28b of the conductive portion 19.
• the drawer slider 18 comprises a recess 23a, 23b upstream of each junction facet 28a, 28b and each recess 23a, 23b receives a strip of insulating material intended to come opposite an electrical conductive pad when the sliding drawer is in its second position.
• the sliding drawer 18 may comprise a section of insulating material upstream of its conducting portion 19.
• the switch 200 here comprises a first and a second primary electrical conductive pad 20a, 20b forming a first pair, and a third electrical conductive pad 30 located downstream of the first pad pair (ie in a first pair).
• radial plane located downstream of the plane in which are disposed the electrical conductive pads 20a, 20b of the first pair) and which will therefore be called "downstream conductive pad" in the following description.
• the electric switch 200 has a switch function. It is for example intended to isolate a faulty component connected to the second primary electrical conductive pad 20b by opening the first electrical circuit connecting the primary electrical conductor pads 20a, 20b and closing a second electrical circuit (bypass circuit) between the first primary electrical conductive pad 20a and the downstream electrical conductive pad 30.
• the switch comprises a sliding drawer 18 mounted in the cavity 14 downstream of the pyrotechnic gas generator 16.
• This sliding drawer 18 comprises a conductive portion 19 bonded, at its upper end, to a portion insulating section 24 complementary to that of the cavity 14, and forming a piston.
• the switch 200 When the switch 200 is in its initial position (ie its first position), the two primary electrical conductor pads 20a, 20b are electrically connected via the conductive portion 19 of the sliding drawer 18, so as to close a first electrical circuit.
• junction facet 26a of the first electrical conductive pad is connected to the corresponding junction facet 28a of the conductive portion 19 by a weld 22a.
• junction facet 26b of the first electrical conductive pad is connected to the corresponding junction facet 28b of the conductive portion 19 by a weld 22b.
• first and the second primary electrical conductive pad 20a, 20b can be connected to the conductive portion 19 by any permanent electrical breakable junction.
• this junction can be a solder.
• the primary electrical conductive pads 20a, 20b and the conductive portion 19 of the sliding drawer can be made in one piece being delimited by breaking primers.
• the primary electrical conductive pads may be biased in contact with the conductive portion by resilient biasing means, for example a spring.
• the conductive portion 19 comprises a first protuberance in the form of a ramp 34 upstream of its junction facet 28a located opposite the first primary electrical conductive pad 20a.
• the lateral face portion of the conductive portion 19 which is located directly upstream of the facet of junction 28a, diverges upstream on a length L4, taken in the axial direction X.
• the length L4 is chosen substantially equal to the length L1 of the junction facets of the primary electrical conductive pads, also taken in the axial direction X.
• the conductive portion 19 also has a second protuberance in the form of a ramp 38 formed downstream of the connecting facets 28a, 28b. As shown in FIG. 7, when the sliding drawer 18 is in its first position, this second protrusion 38 is placed directly upstream of the downstream electrical conductive pad 30.
• the length L5 of this ramp 38 (taken in the axial direction X) is substantially equal to that L6 of the junction facet 31 of the downstream electrical conductive pad 30 (taken in the axial direction X).
• the conductive portion 19 further comprises a recess 36 provided upstream of its junction facet 28b located opposite the second primary electrical conductive pad 20b.
• the first protrusion 34 is located upstream of the first primary electrical conductive pad 20a
• the recess 36 is located upstream of the second primary electrical conductive pad 20b
• the second protuberance 38 is located upstream of the downstream electrical conductive pad 30.
• the sliding drawer 18 is not in contact with the downstream electrical conductive pad 30, which remains inactive.
• the sliding drawer 18 moves downstream in the direction X, the first and the second protuberance 34, 38 are gradually tightened on the first primary electrical conductive pad 20a and on the downstream electrical conductor pad 30.
• the recess 36 is placed opposite the junction facet 26b of the second electrical conductive pad 20b.
• the cavity 14 is terminated in its downstream part by a guiding portion 32, the shape of which is complementary to that of the lower part of the sliding drawer 18.
• the guiding portion 32 allows to guide the sliding drawer 18 as it moves from its first position to its second position. In particular, it prevents the sliding drawer 18 from moving away from the first primary electrical conductive pad 20a and the downstream electrical conductive pad 30, and thus increases the reliability of the electrical contacts in the second electrical circuit (bypass circuit), when the drawer sliding is in its second position.
• the sliding drawer ends, at its lower end, by a conical portion, intended to come into a conical conical recess provided in the bottom wall 15 of the hollow body 12.
• the protuberances 34 and 38 of the conductive portion 19 are located directly upstream of the connecting facets 28a, 28b.
• these protuberances it will obviously be possible for these protuberances to be situated upstream of these joining facets but at a distance from them. In this case, the path traveled by the sliding drawer between its first and second position will simply be larger. However, it must be ensured that the distances between the protuberances and the connecting facets with which they must respectively cooperate remain substantially indicated.
• the conductive portion 19 comprises, in the example considered, a recess 36 located upstream of the second primary electrical conductive pad 20b when the sliding drawer 18 is in its first position.
• This recess makes it possible to break the electrical contact between the sliding drawer and the second conductive pad 20b when the drawer makes its way inside the cavity.
• the sliding drawer may comprise an insulating portion, upstream of the joining facet 28b. This insulating portion is then configured to come opposite the second primary electrical conductive pad 20b once the sliding drawer 18 in its second position.
• the face of the sliding drawer located opposite the second primary electrical conductive pad 20b can diverger downstream, as well as the corresponding junction facet of the conductive pad 20b, whereby the sliding drawer 18 is able to disengage immediately from the electrical conductive pad 20b without parasitic friction.
• the downstream electrical conductive pad may be biased towards the inside of the cavity 14 by resilient biasing means, for example a spring.
• resilient biasing means for example a spring.
• the ramp 38 gradually constrains the downstream electrical conductive pad in a direction opposite to the force of said resilient biasing means.
• the downstream electrical conductive pad is biased in contact with the conductive portion 19 by said resilient biasing means.
• FIGS. 9 to 11 illustrate an electrical switch 201 according to a variant of the fourth embodiment of the invention. All the characteristics described above in connection with FIGS. 7 and 8 remain valid and are therefore not described again.
• the conductive portion 19 of the sliding drawer 18 has a third protuberance 40 situated in the vicinity of the recess 36.
• this protuberance 40 is positioned downstream of the recess 36 and upstream of the junction facet 28b of the conductive portion 19 connected to the second primary electrical conductive pad 20b.
• This protrusion 40 has an axial length L7 smaller than those L4, L5 of the first and the second protuberance 34, 38.
• Figure 10 shows the sliding drawer 18 in an intermediate position between its first and second position.
• the first and second protuberances 34, 38 began to tighten respectively on the first electrical conductive pad 20a and the downstream electrical conductive pad 30.
• the third protuberance 40 is clamped on the second electrical conductive pad 20b. Furthermore, the sliding drawer 18 is engaged in the guide portion 32.
• the three electrical conductive pads 20a, 20b and 30 are therefore short-circuited and the flow of current in the second circuit electrical (branch circuit) connecting the electrical conductor pads 20a and 30 begins before the first electrical circuit (which connects the electrical conductive pads 20a and 20b) is cut.
• the third protuberance 40 is located downstream of the second primary electrical conductive pad 20b, and the recess 36 is positioned opposite this second electrical conductive pad 20b.
• Figures 12 to 14 illustrate an electrical switch 202 according to another variant of the fourth embodiment of the present invention, comprising a plurality of circuits initially mounted in parallel.
• the switch 202 comprises a first pair of primary electrical conductive pads 20a, 20b, and a second pair of primary electrical conductive pads 20c, 20d located downstream of said first pair 20a, 20b.
• the electrical conductive pads of the first pair are defined along an axis AA perpendicular to the axial direction X
• the electrical conductive pads of the second pair 20c, 20d are located along an axis BB parallel to axis AA, downstream of it.
• the sliding drawer 18 comprises a first conducting portion 42, substantially identical to that described in connection with the fifth embodiment described above, and a second conducting portion 44 located downstream of the first conducting portion. 42.
• the two conductive portions 42 and 44 are separated from each other by an insulator 46 extending, in the example, in an axial plane.
• a connecting face 28a of the first conductive portion 42 is connected to a first primary electrical conductive pad 20a of the first pair 20a, 20b, and a second connecting facet 28b is connected. to the second primary electrical conductor pad 20b of the first pair 20a, 20b.
• the electrical conductive pads of the first pair 20a, 20b are connected to the first conductive portion 42 by welds 22a, 22b.
• the first conductive portion 42 of the sliding drawer 18 comprises a first protrusion 34 upstream of its junction facet 28a, and a second protrusion 38 located upstream of the first primary electrical conductive pad 20c of the second pair 20c, 20d.
• the second conductive portion 44 is located opposite the electrical conductive pads 20c, 20d of the second pair.
• it comprises a first junction facet 28c connected by a weld 22c to the corresponding junction facet of the stud 20c, and a second junction facet connected by a weld 22d to the corresponding junction facet of the stud 20d.
• the connections between the electrical conductive pads and the conductive portions of the sliding drawer may be any other type of permanent electric breakable joint.
• these bonds may be solders.
• the electrical conductive pads and the conductive portions of the sliding drawer can be made in one piece, and be delimited by breaking primers.
• the primary electrical conductive pads may be biased in contact with the conductive portion by resilient biasing means, for example a spring.
• the sliding drawer 18 has a first recess 36 upstream of its junction facet 28b connected to the second conductive pad 20b of the first pair, and a second recess 48 upstream of its facet of junction 28d connected to the second electrical conductive pad 20d of the second pair.
• the primary electrical conductor pads 20a, 20b of the first pair are electrically connected via the first conductive portion 42 of the sliding drawer 18 and the primary electrical conductive pads 20c, 20d of the second pair are electrically connected via the second conductive portion 44 of the sliding drawer 18.
• the insulator 46 is placed upstream of the connecting facets 28c, 28d of the sliding drawer 18 connected to the second pair of primary electrical conductive pads 20c, 20d, and downstream of the second protrusion 38 and the second recess 48.
• first recess 36 is positioned opposite the junction facet 26b of the second primary electrical conductive pad of the first pair 20a, 20b.
• second recess 48 is positioned opposite the junction facet 26d of the second primary electrical conductive pad 20d of the second pair 20c, 20d.
• the insulator 46 is found downstream of the first primary electrical conductive pad 20c of the second pair.
• a bypass circuit is closed between the first electrical conductive pad 20a of the first pair and the first electrical conductive pad 20c of the second pair, via the first conductive portion 42 of the sliding drawer.
• the sliding drawer further comprises a third protuberance 40, shorter than the first and second protuberances 34, 38, located upstream of its junction facet 28b, and downstream of the recess 36.
• the first and second protuberances 34, 38 began to tighten respectively on the first primary electrical conductive pad 20a and the secondary electrical conductive pad 30.
• the second electrical pad of the second pair is, him, no longer in contact with the second conductive portion 44.
• the third protrusion 40 has clamped on the second primary electrical conductive pad 20b.
• the three electrical conductive pads 20a, 20b and 30 are short-circuited thanks to the third protrusion 40 and the passage of the current in the second electrical circuit (branch circuit) connecting the electrical conductive pads 20a and 30 begins before the first electrical circuit (which connects the primary electrical conductor pads 20a and 20b) is cut.

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• Push-Button Switches (AREA)
• Slide Switches (AREA)
• Switch Cases, Indication, And Locking (AREA)
• Air Bags (AREA)
• Switches Operated By Changes In Physical Conditions (AREA)
• Fuses (AREA)

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• 2009
  • 2009-11-27 FR FR0958446A patent/FR2953324B1/fr active Active
• 2010
  • 2010-11-26 EP EP10799115.0A patent/EP2504852B1/de not_active Not-in-force
  • 2010-11-26 WO PCT/FR2010/052545 patent/WO2011064510A1/fr active Application Filing
  • 2010-11-26 CN CN201080062125.7A patent/CN102870183B/zh not_active Expired - Fee Related
  • 2010-11-26 US US13/512,226 patent/US9058940B2/en not_active Expired - Fee Related
  • 2010-11-26 HU HUE10799115A patent/HUE025754T2/en unknown
  • 2010-11-26 JP JP2012540485A patent/JP5743341B2/ja not_active Expired - Fee Related
  • 2010-11-26 PL PL10799115T patent/PL2504852T3/pl unknown

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