Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/54—Contact arrangements
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H51/00—Electromagnetic relays
  • H01H51/02—Non-polarised relays
  • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
  • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
  • H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
  • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/16—Magnetic circuit arrangements
  • H01H50/18—Movable parts of magnetic circuits, e.g. armature
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/16—Magnetic circuit arrangements
  • H01H50/18—Movable parts of magnetic circuits, e.g. armature
  • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/16—Magnetic circuit arrangements
  • H01H50/18—Movable parts of magnetic circuits, e.g. armature
  • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/16—Magnetic circuit arrangements
  • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
  • H01H50/42—Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2235/00—Springs
  • H01H2235/01—Spiral spring
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H3/00—Mechanisms for operating contacts
  • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
  • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
  • H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current

Definitions

• the present invention relates to an improved micro-solenoid contactor of a motor vehicle starter, as well as to the corresponding starter.
• the invention finds a particularly advantageous application in the field of electromagnetic contactors for power circuits, in particular for an electric motor of a thermal engine starter, in particular of a motor vehicle.
• the invention is in particular used with starter systems so-called "stop and start” for stopping and restarting the engine of the vehicle depending on particular traffic conditions.
• an electromagnetic contactor for a power circuit comprises a movable contact mounted on a control rod.
• the movable contact is intended to come into contact with power terminals arranged in a contact chamber.
• This contactor is for example used to control the actuation of an electric motor of an internal combustion engine starter.
• an electromagnetic contactor 1 shown in FIGS. 1a to 1c is provided with a movable core 3, a stationary core 4 and a metal casing 6, or tank, in which are arranged a coil of call 81 and a holding coil 82 mounted on an insulating annular support 9.
• This support 9 and the front end of the casing 6 are centrally provided with a passage for the mobile core 3.
• An end of the movable core 3 is connected to a pivoting lever (not shown) which acts for example on the starter of the starter as described in document FR2795884.
• the spring teeth against teeth 10 can be compressed in the event of direct non-penetration of the starter gear (not shown) in the starter ring connected to the heat engine and the connecting rod 12 connected to the pivoting lever.
• the other end of the movable core 3 is intended to act on a front end of a control rod 15 by pushing through a central hole 16 of the fixed core 4 in which the front portion of the rod 15 is slidably mounted.
• the control rod 15 carries a contact plate 21.
• the contact plate 21 extends transversely with respect to the rod 15 to cooperate with two electrical terminals 26a, 26b of an electric power circuit and establish an electrical contact therebetween.
• One of the terminals 26a is intended to be connected to a positive terminal of the battery, the other terminal 26b being intended to be connected by means of a cable to the brushes of the electric motor of positive polarity.
• the two terminals 26a, 26b are fixed and carried by a cover 30 of electrically insulating material ensuring the closing of the rear of the tank 6.
• the fixing of the cover 30 is made by folding the material of the free end of the tank 6 on the hood 30.
• the rod 15 carries an axial compression spring 32 arranged between a shoulder 33 of the rod 15 and a face of the movable contact 21.
• the contactor 1 also comprises a return spring 38 arranged between the cover 30 and a stop of the control rod 15.
• a micro-solenoid 41 is integrated in one of the terminals 26a.
• This micro-solenoid 41 comprises a coil 42 fixed relative to the cover 30 and a core 43 movable in translation relative to the cap 30.
• This core 43 is movable between an initial position in which one end of the core 43 protrudes from the terminal 26a so as to prevent electrical contact between the plate 21 and the terminal 26a; and a final position in which the core 43 allows electrical contact between the plate 21 and the terminal 26a.
• a return spring 46 is supported on the one hand against the bottom of the cover 30 and on the other hand against an end head of the core 43 located vis-a-vis the cover 30. This spring 46 ensures the return of the core 43 in initial position following a power failure of the micro-solenoid 41.
• the mobile core 3 is initially in a so-called rest position, in which the core 3 is remote from the fixed core 4.
• the plate 21 is then in a deactivated position in which the plate 21 is remote from the contact terminals 26a, 26b.
• the micro-solenoid 41 is then not powered and its core 43 is held in the initial position by the return spring 46.
• the coils 81 and 82 are electrically activated and then create a magnetic field.
• This magnetic field allows the axial displacement of the movable core 3 towards the fixed core 4.
• the rear end of the movable core 3 comes into contact with the front end of the control rod 15 and then axially moves the rod 15 through the hole 16 towards the rear of the contactor 1 until said movable core 3 bears against the fixed core 4 in a so-called magnetized position.
• the displacement of the rod 15 has the effect of moving the plate 21 in a so-called pre-engagement position in which the plate 21 is in contact with the terminal 26b but is kept at a distance from the other terminal 26a.
• the micro-solenoid 41 has been previously supplied, so that its core 43 can withstand the force applied by the plate 21 and thus be maintained in the initial position.
• the crushing spring 32 is then compressed.
• the supply of the micro-solenoid 41 is cut off, so that the core 43 which no longer resists the force applied by the plate 21 can then move to the final position shown. in Figure 1c.
• the contact plate 21 then makes contact with the two terminals 26a, 26b, which provides power to the electric motor of the starter.
• the problem lies in the fact that the crushing spring 32 has stored mechanical energy such that when the current flowing through the coil 42 of the micro-solenoid 41 is cut in order to pass the contact plate 21 from the pre-engagement position at the active position, the core 43 will tend to oscillate between its final position and its initial position, which will generate shocks with the plate 21 and therefore a risk of reopening of the electrical contact between the plate 21 and the terminals of the contactor 26a, 26b.
• the present invention aims to effectively remedy this disadvantage by proposing a contactor for a heat engine starter, comprising:
• micro-solenoid comprising a fixed coil with respect to said cover and a core movable in translation relative to said cover between an initial position and a final position
• a contact plate situated inside said cover able to be moved between a deactivated position in which said contact plate is moved away from the contact terminals or away from at least one contact terminal and an active position in which said plate contact is in contact with the two contact terminals,
• said contact plate is attached to said core of said micro-solenoid such that upon movement of said contact plate from the active position to the deactivated position, said contact plate drives said core of said micro-solenoid to its initial position.
• the invention thus makes it possible to eliminate the use of the return spring of the micro-solenoid core, which reduces the oscillation effect observed during the release of the energy stored by the compression spring when the contact moves from the pre-engagement position to the active position.
• the core when the coil of the microsolenoide is electrically powered, the core is kept in the initial position.
• the core in its initial position prevents the contact plate from being in the active position.
• the core when the coil of the micro solenoid is deactivated and in that when the contact plate moves from the deactivated position to the active position, the core moves from its initial position to its final position.
• the core moves from its initial position to its final position by being attracted by a magnet or by means of the plate that pushes it or a resilient element compressed in the initial position of the core.
• said contactor comprises
• a contact plate adapted to move from an active position to a deactivated position, a first terminal adapted to be connected to a brush of the electric motor and a second terminal adapted to be connected to a positive terminal of a power source, such that a battery, and that in the position deactivates the contact plate is moved away from the first and the second terminal, in the active position the contact plate electrically connects the two terminals, wherein, when the plate passes from the position deactivates to the active position and the micro-solenoid core is in the initial position, the contact plate is between the deactivated position and the active position, in an intermediate position in contact with one of the terminals, for example the second terminal, and is pressing the nucleus of the solenoid split in the initial position.
• the contactor is configured so that there is a clearance between a head of the core of said micro-solenoid and a face of said contact plate when said core is in the final position. This prevents the end of the core comes into contact with the plate when the core is in the final position.
• the contactor is configured so that there is a clearance between an intermediate shoulder of the core of said micro-solenoid and a face of said contact plate facing said intermediate shoulder when said core is in the final position. This prevents any possible rebound of the core when the latter passes from the initial position to the final position causes a shock between the contact plate and the intermediate shoulder.
• the contactor comprises a retaining means of the micro-solenoid core in the final position.
• the retaining means comprises a magnet positioned at the bottom of said cover. This embodiment is particularly simple to achieve.
• a force of a return spring positioned between a bottom of said cover and a control rod is strong enough to detach the core of said micro-solenoid relative to the magnet following a deactivation of said contactor.
• the retaining means comprises a U-shaped magnetic support positioned at the bottom of said cover.
• the contactor is configured to establish a magnetic flux loop passing through the magnetic medium when said micro-solenoid core is in the end position. This creates a magnetic force holding the solenoid core in the final position when the plate is in the active position.
• the contactor comprises a resistor mounted between one end of the coil of the micro-solenoid and one end of a call coil. This allows a current to flow through the solenoid coil while its control switch is open to generate sufficient magnetic force to hold the solenoid core in the end position.
• the contact plate when the contact plate is pressed against the core in the initial position, the contact plate is in contact with one of the terminals and in that when the core moves from its initial position to its final position due to the deactivation of the micro solenoid (the solenoid coil is no longer energized) the contact plate pivots and comes into contact with the other terminal causing the electric motor of the starter to be energized.
• the invention also relates to a thermal engine starter comprising a contactor as previously described.
• Figures 1a to 1c are longitudinal sectional views of a contactor according to the state of the art respectively in a state of rest, a state of pre-commitment, and in an active state;
• Figures 2a to 2c are longitudinal sectional views of a first embodiment of a contactor according to the invention respectively in a state of rest, a state of pre-commitment, and in an active state for starting the engine electric;
• FIG. 3 is a schematic representation of an electrical control circuit of the starter according to the present invention.
• FIGS. 4a and 4b are diagrammatic representations of the flow generated by the micro-solenoid respectively when the switch lnt_comm_2 of the circuit of FIG. 3 is in the activated state and in the deactivated state;
• FIGS. 5a to 5c are views in longitudinal section of a second embodiment of a contactor according to the invention provided with an intermediate piece respectively in a state of rest, a state of pre-engagement, and in a state active;
• FIGS. 6a and 6b show partial sectional views of a third embodiment of a contactor according to the invention provided with a pneumatic damping device respectively when the micro-solenoid core is in an initial position and in a a final position;
• Figure 7 is a detail view of the openings of the membrane of the damping device of Figures 6a and 6b.
• FIGs 2a to 2c illustrate a switch 1 rising in place of the contactor of Figures 1a to 1c.
• This contactor 1 is for example used to control the actuation of an electric motor of an internal combustion engine starter.
• This electromagnetic contactor 1 is provided with a mobile core 3, a fixed core 4 and a metal casing 6, or tank, in which is arranged a call coil and a holding coil mounted on an insulating annular support. .
• This support and the front end of the casing are centrally provided with a passage for the mobile core 3.
• an end of the movable core 3 is connected to a pivoting lever (not shown) which acts for example on the starter of the starter as described in document FR2795884.
• the starter further comprises a teeth against teeth spring capable of being compressed in the event of non-penetration of the starter gear (not shown) into the starter ring connected to the heat engine, as well as a connecting rod linked to the pivoting lever as in the embodiment of Figures 1a to 1c.
• the other end of the movable core 3 is intended to act on a front end of a control rod 15 by pushing through a central hole 16 of the fixed core 4 in which the front portion of the rod 15 is slidably mounted.
• the control rod 15 carries a contact plate 21.
• the contact plate 21 extends transversely with respect to the rod 15 to cooperate with two electrical terminals 26a, 26b of an electrical power circuit and establish an electrical contact therebetween.
• One of the terminals 26a is intended to be connected to a positive terminal of the battery, the other terminal 26b being intended to be connected by means of a cable to the brushes of the electric motor of positive polarity.
• the two terminals 26a, 26b are fixed and carried by a cover 30 of electrically insulating material ensuring the closure of the rear of the tank 6.
• the fixing of the cover 30 is made by folding the material of the free end of the tank on the hood 30.
• the rod 15 carries an axial compression spring 32 arranged between a shoulder 33 of the control rod 15 and a face of the movable contact 21.
• the contactor 1 also comprises a return spring 38 arranged between the cover 30 and a stop of the control rod 15.
• a micro-solenoid 41 integrated in the terminal 26a comprises a coil 42 fixed relative to the cover 30 and a core 43 movable in translation relative to the cover 30.
• the core 43 is positioned in the opening defined by the coil 42 The core 43 is movable between an initial position in which one end of the core 43 protrudes from the terminal 26a, so as to prevent electrical contact between the plate 21 and the terminal 26a; and a final position in which the core 43 allows electrical contact between the plate 21 and the terminal 26a.
• the contact plate 21 is attached to the core 43 such that when moving the contact plate 21 from the active position to the deactivated position, the contact plate 21 drives the core 43 to its initial position.
• the plate 21 is mounted via an opening on a portion 431 of reduced section of the core 43.
• This portion is delimited axially by a head 432 of the core 43 situated on the side of the core. fixed 4 and an intermediate shoulder 433 located between the two end heads 432, 434 of the core 43.
• the plate 21 has an opening having a diameter substantially equal to the diameter of the reduced section portion, but smaller than the diameter of the end head 432 and the intermediate shoulder 433.
• This shoulder 433 is defined by a diameter difference of the core 43.
• the manufacture may for example be made by inserting the portion 433 still devoid of the head 432 in the opening of the contact plate 21, then the end of the portion 433 is deformed by crushing forming the head 432.
• the head 432 and the opening of the plate are formed so as to be mounted by bayonet.
• the head 432 is for example rectangular and the opening is also rectangular so as to be able to insert the head and then the portion 433 of the core 43 into the plate through the opening and then turn the core 43 by 90 °. 90 ° to the plate so that the rectangle-shaped head can not pass through the rectangle-shaped opening.
• the head 432 is a washer fixed on the portion 433, for example by tight fitting, welding bonding.
• the contactor 1 further comprises a magnet 51 positioned at the bottom of the cover 30 to ensure retention of the core 43 of the micro-solenoid 41 when the latter is in the final position, in order to minimize the risk of rebounds of the core 43.
• the force of the return spring 38 is strong enough to detach the core 43 relative to the magnet 51 during a power off of the call coils and holding.
• the mobile core 3 is initially in a so-called rest position, in which the core 3 is away from the core 4 fixed.
• the plate 21 is then in a deactivated position in which the plate 21 is remote from the contact terminals 26a, 26b.
• the micro-solenoid 41 is not powered.
• the core 43 is held in the initial position by the contact plate 21 which pulls on the head 432 of the core 43 while the opposite head 434 bears against one end of the coil 42.
• the call coil and the holding coil are electrically activated and then create a magnetic field.
• This magnetic field allows the axial displacement of the mobile core 3 towards the fixed core 4, as shown in Figure 2b.
• the rear end of the movable core 3 comes into contact with the front end of the control rod 15 and then axially moves the rod 15 through the hole 16 towards the rear of the contactor 1 until said movable core 3 comes to bear against the fixed core 4 in a so-called magnetized position.
• the displacement of the rod 15 has the effect of moving the plate 21 in a position, called pre-engagement, in which the plate 21 is in contact with the terminal 26b but is kept at a distance from the other terminal 26a.
• the micro-solenoid 41 has been previously supplied, so that the core 43 can withstand the force applied by the plate 21 bearing against the intermediate shoulder 433.
• the core 43 is thus maintained in the initial position.
• the return spring 38 and the crushing spring 32 are otherwise compressed.
• the mobile core 3 When the coils 81 and 82 are de-energized, the mobile core 3 is no longer attracted towards the fixed core 4, which causes the mobile core 3 to return to the rest position via the action of a positioned spring between the tank 6 and an end of the movable core 3.
• the axial compression spring 32 and the return spring 38 are decompressed by pushing on the control rod 15, which has the effect of moving the contact plate 21 away from the terminals 26a, 26b.
• the core 43 then separates from the magnet 51 and is driven by the contact plate 21 to its initial position. The displacement of the core 43 is limited by the head 434 which abuts against the coil 42.
• the contact plate 21 then moves from the active position to the deactivated position.
• the magnet 51 is replaced by a U-shaped magnetic support 52 positioned at the bottom of the cover 30.
• the support 52 is configured to establish a loop B2 of magnetic flux passing through the core 43, and the magnetic support 52 when the core 43 is in the final position.
• FIG. 3 represents an electrical control diagram of the starter for generating the magnetic attraction force of the core 43 when the latter is in the final position.
• the terminal 26a is connected to the positive terminal of the battery Batt while the other terminal 26b is connected to the brushes of positive polarity via a cable.
• the contact plate 21 is capable of establishing a contact between these two terminals 26a, 26b as explained above.
• Brushes 54 of negative polarity are connected to the mass of the starter.
• the references 56 and 57 respectively correspond to the control lever and the starter drive.
• the call coil and the holding coil are interconnected in parallel and connected to the positive terminal of the battery Batt via a first control switch lnt_comm_1.
• the coil 42 of the micro-solenoid is connected firstly to ground and secondly to the positive terminal of the battery Batt via a second control switch lnt_comm_2.
• a resistor 59 is mounted between one end of the micro-solenoid coil 42 (that located on the side of the switch lnt_comm_2) and one end of the call coil.
• the micro-solenoid 41 When the two control switches lnt_comm_1 and lnt_comm_2 are activated, the micro-solenoid 41 is energized and blocks the plate 21 in the pre-engagement position. The coil 42 then generates a flow loop B1 passing through the core 43, but not by the support 52 from which the core 43 is located.
• the micro-solenoid 41 is powered by the call coil, via the resistor 59.
• the micro-solenoid 41 then does not generate enough force to block the plate 21, so that the plate 21 goes into the active position and the core 43 in the final position.
• the coil 42 of the micro-solenoid remains energized via the coil 81 and the resistor 59.
• the coil 42 then generates a magnetic flux loop B2 passing through the magnetic medium 52 and the core. 43 which maintains the core 43 of the micro-solenoid 41 at the bottom of the cap 30.
• the attraction force is low due to the reduced power supply of the coil 42 and the configuration of the magnetic circuit.
• the magnetization force generated by the flow loop B2 must be greater than the force exerted by the return spring 46 which is then compressed. This avoids rebounds of the core 43 during its passage from the initial position to the final position.
• the contactor 1 comprises an intermediate piece 61 mounted between a return spring 46 and the control rod 15. Moreover, the return spring 38 is positioned between the stop of the rod of control 15 and the cover 30. The intermediate piece 61 is configured to raise the core 43 of the micro-solenoid 41 from the final position to the initial position.
• the intermediate piece 61 has a first portion 61 1 extending axially forwardly positioned between the return spring 46 of the core 43 and the rear end of the control rod 15.
• a second median portion 612 s extends radially from the rear end of the first portion 61 1 towards the core 43 of the micro-solenoid 41.
• a third portion 613 extends axially rearwardly from a rear face of the medial portion 612.
• a fourth portion 614 extends radially toward the core 43.
• the movable core 3 is initially in a so-called rest position, in which the core 3 is remote from the fixed core 4.
• the plate 21 is then in a deactivated position in which the plate 21 is remote from the contact terminals 26a, 26b.
• the micro-solenoid 41 is not powered.
• the core 43 is held in the initial position by the intermediate piece 61 biased by the return spring 46. Indeed, the intermediate piece 61 is then supported, via a front face of the fourth portion 614, against the head 434 of the core 43 which comes to a stop against one end of the coil 42.
• the intermediate part 61 is then in a so-called initial position.
• the call coil and the holding coil are electrically activated and then create a magnetic field.
• This magnetic field allows the axial displacement of the movable core 3 towards the fixed core 4.
• the rear end of the movable core 3 comes into contact with the front end of the control rod 15 and then axially moves the rod 15 through the hole 16 towards the rear of the contactor 1 until said movable core 3 bears against the fixed core 4 in a so-called magnetized position as shown in FIG. 5b.
• the rearward displacement of the rod 15 has the effect of rearwardly moving the intermediate piece 61 into a final position in which the intermediate piece 61 is located at a distance from the head 434 of the core 43, which frees the core 43.
• the fourth portion 614 of the intermediate piece 61 is then in a recess 63 formed in the cover 30.
• the return spring 38 of the control rod 15, and the return spring 46 of the core 43 of the micro-solenoid 41 are then compressed.
• the displacement of the rod 15 also causes the plate 21 to move from the deactivated position to the pre-engagement position, in which the plate 21 is in contact with the terminal 26b but is kept at a distance from the other terminal 26a.
• the micro-solenoid 41 has been previously supplied, so that the core 43 maintained in the initial position can withstand the force applied by the plate 21 bearing against one end of the core 43 opposite the head 434.
• the compression spring 32 is also compressed due to the pressurization of the plate 21 against the terminal 26b.
• the intermediate piece 61 is in the final position, the coil 42 thus maintains only the core 43 in the initial position.
• the axial compression spring 32 and the return spring 38 are decompressed, which has the effect of moving the contact plate 21 from the terminals 26a, 26b. Furthermore, the decompression of the return spring 46 makes the intermediate piece 61 from the end position to the initial position. During this movement, the intermediate piece 61 bears on the core 43 to also move it from the final position to the initial position, as well as to maintain it then in this initial position by the action of the spring 46. The displacement the core 43 is limited by the head 434 which abuts against the coil 42. The contact plate 21 then moves from the active position to the deactivated position.
• a retaining means of the core 43 in the form of a magnet 51 or a magnetic support 52 in the shape of a U, in order to limit the inadvertent movements of the core 43 when the latter is in the final position.
• Figures 6a and 6b show an alternative embodiment in which the contactor 1 comprises a pneumatic damping device 71 of the displacement of the core 43 of the micro-solenoid.
• the contactor 1 comprises a return spring 46 positioned between the bottom of the cover 30 and the head 434 of radial extension forming a stop of the core 43.
• the damping device 71 comprises a membrane 72 provided with through openings 73.
• the membrane 72 extends between an outer periphery of the core 43 and an inner wall of the cover 30.
• the membrane 72 is held wedged between two parts 301, 302 forming the cover 30.
• the membrane 72 is thus kept stuck at the location of the detent zone between the two parts 301, 302.
• the membrane 72 is glued or preferably overmolded on an outer periphery of the core 43.
• the membrane 72 has openings 73 of variable dimensions as a function of a direction of the flow of air F1, F2 generated by a displacement of the core 43 of the micro-solenoid 41.
• the openings 73 have a larger diameter when the flow of air F1 is directed through the openings 73 from the inside to the outside of a space E delimited by the membrane 72 and the bottom of the cover 30, that when the airflow F2 is directed through openings 73 from the outside to the inside of said space E.
• the openings 73 of the membrane 72 are delimited by lips 76 curved out of the space when the device 71 is in the rest state.
• the lips 76 are then at the position P0.

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Electromagnets (AREA)
• Reciprocating, Oscillating Or Vibrating Motors (AREA)

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• 2014
  • 2014-02-27 FR FR1451567A patent/FR3017989B1/fr not_active Expired - Fee Related
• 2015
  • 2015-02-19 EP EP15709283.4A patent/EP3111461A1/de not_active Withdrawn
  • 2015-02-19 WO PCT/FR2015/050408 patent/WO2015128564A1/fr active Application Filing
  • 2015-02-19 JP JP2016543225A patent/JP2017513174A/ja active Pending
  • 2015-02-19 US US15/119,958 patent/US10068734B2/en not_active Expired - Fee Related
  • 2015-02-19 CN CN201580003398.7A patent/CN105849848A/zh active Pending

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