EP3958283B1 - Relais électromagnétique capable de résister à un courant de court-circuit - Google Patents

Relais électromagnétique capable de résister à un courant de court-circuit Download PDF

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Publication number
EP3958283B1
EP3958283B1 EP21275109.3A EP21275109A EP3958283B1 EP 3958283 B1 EP3958283 B1 EP 3958283B1 EP 21275109 A EP21275109 A EP 21275109A EP 3958283 B1 EP3958283 B1 EP 3958283B1
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EP
European Patent Office
Prior art keywords
piece
static
moving
contact
spring piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP21275109.3A
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German (de)
English (en)
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EP3958283A2 (fr
EP3958283A3 (fr
EP3958283C0 (fr
Inventor
Feifei Fu
Yiqing Zhu
Zhonghua Tan
Jinqiang Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Hongfa Electroacoustic Co Ltd
Original Assignee
Xiamen Hongfa Electroacoustic Co Ltd
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Publication date
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Publication of EP3958283A2 publication Critical patent/EP3958283A2/fr
Publication of EP3958283A3 publication Critical patent/EP3958283A3/fr
Application granted granted Critical
Publication of EP3958283B1 publication Critical patent/EP3958283B1/fr
Publication of EP3958283C0 publication Critical patent/EP3958283C0/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
    • H01H50/041—Details concerning assembly of relays
    • 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
    • H01H50/24—Parts rotatable or rockable outside coil
    • H01H50/26—Parts movable about a knife edge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/14—Terminal arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/60—Contact arrangements moving contact being rigidly combined with movable part of magnetic circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/648—Driving arrangements between movable part of magnetic circuit and contact intermediate part being rigidly combined with armature
    • 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

Definitions

  • the present disclosure relates to the technical field of relays, in particular to an electromagnetic relay capable of resisting short-circuit current.
  • Short-circuit refers to the situation when two points with different potentials in a normal circuit are directly connected incorrectly or connected by a conductor with very small impedance (or resistance).
  • the current intensity is very high during short circuit, which will often damage electrical equipment or cause fire.
  • the current connected in this case is the short circuit current.
  • the relay When the relay is working normally in the circuit, when the short circuit current passes through, the electrodynamic repulsion formed by the short circuit current will affect the contact parts of the relay, and in severe cases, it may cause contact bonding or abnormal disconnection failure.
  • the ability of a relay to resist a certain short circuit current without damage is called the ability of the relay to withstand short circuit current.
  • WO 2010/129829 A1 discloses an electromagnetic relay that enables current to pass through switch termini and comprises a coil assembly, a rotor or bridge assembly, and a switch assembly.
  • the coil assembly comprises a coil and a C-shaped core.
  • the coil is wound round a coil axis extending through the coil.
  • the core comprises core termini parallel to the coil axis.
  • the bridge assembly comprises a bridge and an actuator.
  • the bridge comprises medial, lateral and transverse field pathways.
  • the actuator extends laterally from the lateral field pathway.
  • the core termini are coplanar with the axis of rotation and received intermediate the medial and lateral field pathways.
  • the actuator is cooperable with the switch assembly.
  • the coil creates a magnetic field directable through the bridge assembly via the core termini for imparting bridge rotation about the axis of rotation.
  • the bridge rotation displaces the actuator for opening and closing the switch assembly.
  • the present disclosure provides an electromagnetic relay capable of resisting short-circuit current.
  • an electromagnetic relay capable of resisting a short-circuit current
  • the electromagnetic relay including a base, a magnetic circuit part, a static spring part and a moving spring part
  • the static spring part includes a static spring lead-out piece and an elastic static spring piece, the static spring lead-out piece being arranged on the base, and the static spring piece being provided with a static contact
  • the static spring piece being connected to the static spring lead-out piece such that an electrical force is generated driving the static spring piece in a direction towards the moving spring part when the static spring piece and the moving spring part are in an energized state, the electrical force resisting an electrical repulsive force received by the static contact in the energized state.
  • the electrical force is greater than the electrical repulsive force, and/or, in a state where the static contact is in contact with a moving contact of the moving spring part, the static spring piece generates an elastic pre-pressure oriented toward the moving spring part.
  • one end of the static spring piece is connected with the static spring lead-out piece, and the base is provided with a limiting structure, the limiting structure restricts the other end of the static spring piece from moving toward the moving spring part and/or the static spring lead-out piece, or, the limiting structure restricts a movement stroke of the other end of the static spring piece moving toward the moving spring part and/or the static spring lead-out piece.
  • the static spring piece is in an elastic pre-pressure state through the limiting structure before the static contact contacts the moving contact of the moving spring part.
  • the limiting structure is a limiting slot, and the other end of the static spring piece is inserted into the limiting slot; when the static contact is in contact with the moving contact, there is a preset gap between the other end of the static spring piece and a slot wall of the limiting slot close to the moving spring part.
  • the static spring lead-out piece and the static spring piece form a U-shape or V shape; the static spring piece and the static spring lead-out piece are riveted or welded.
  • the magnetic circuit part includes a yoke, an armature, and a coil former equipped with an iron core and an enameled wire, the coil former is arranged on the base, and the armature is arranged at a knife edge of the yoke and matched with the moving spring part and the iron core.
  • auxiliary moving spring piece provided with an auxiliary moving contact and an auxiliary static spring piece provided with an auxiliary static contact
  • the auxiliary moving spring piece and the auxiliary static spring piece are correspondingly matched, and they are respectively mounted on the coil former and/or the base, the auxiliary moving spring piece is linked with the armature, and an action state of the auxiliary moving spring piece is opposite to an action state of the moving spring part.
  • the auxiliary moving spring piece includes a vertical first piece body and a horizontal second piece body, the first piece body is integrally connected with the second piece body, and a bottom of the first piece body passes through the base, the second piece body is Z-shaped and/or is provided with a hollow structure, and the second piece body is provided with an auxiliary moving contact and is linked with the armature; the auxiliary moving spring piece and the auxiliary static spring piece are respectively inserted into the coil former from a side of the coil former; the armature is provided with a driving part for driving the second piece body to move.
  • the moving spring part includes a rigid moving spring piece provided with a moving contact, and the rigid moving spring piece is relatively fixed to the armature; a restoring spring piece is inserted between the yoke and the base, and the restoring spring piece limits the armature and provides the armature to reset.
  • the rigid moving spring piece and the armature are connected together by a plastic part through insert injection molding or glue dispensing.
  • the present disclosure has the following beneficial effects:
  • the electromagnetic relay capable of resisting short-circuit current of the present disclosure is not limited to the embodiment.
  • an electromagnetic relay capable of resisting short-circuit current of the present disclosure includes a base 1, a magnetic circuit part, a static spring part 2 and a moving spring part.
  • the static spring part 2 includes a static spring lead-out piece 21 and an elastic static spring piece 22.
  • the static spring lead-out piece 21 is arranged on the base 1, and the static spring piece 22 is provided with a static contact 221.
  • the static spring piece 22 is electrically connected to the static spring lead-out piece 21, and the static spring piece 22 generates an electric power in the direction of the moving spring part in the energized state, and the electric power can resist the electric repulsive force received by the static contact 221.
  • the electric power is greater than the electric repulsive force, and/or, when the static contact 221 is in contact with the moving contact 91 of the moving spring part, the static spring piece 22 generates an elastic pre-pressure in the direction toward the moving spring part.
  • the "and/or” means that the present disclosure only has the situation that "the electric power is greater than the electric repulsive force", or, in the present disclosure, there is only a situation in which "when the static contact 221 is in contact with the moving contact 91 of the moving spring part, the static spring piece 22 generates an elastic pre-pressure in the direction of the moving spring part", or, the present disclosure both has “the electric power is greater than the electric repulsive force" and "when the static contact 221 is in contact with the moving contact 91 of the moving spring part, the static spring piece 22 generates an elastic pre-pressure in the direction of the moving spring part".
  • the electric power is greater than the electric repulsive force, and when the static contact 221 is in contact with the moving contact 91 of the moving spring part
  • the base 1 is provided with a limiting structure, the limiting structure restricts the other end of the static spring piece 22 from moving toward the moving spring part and/or the static spring lead-out piece 21, or, the limiting structure restricts the movement stroke of the other end of the static spring piece 22 moving toward the moving spring part and/or the static spring lead-out piece 21, and the static spring piece 22 is in an elastic pre-pressure state before its static contact 221 contacts the moving contact 91.
  • the limiting structure is specifically a limiting slot 11, and the other end of the static spring piece 22 is inserted into the limiting slot 11. As shown in FIG. 3 , the static spring piece 22 has a certain opening angle in advance (as shown by the dashed line in FIG.
  • the limiting structure is a limiting protrusion.
  • the static spring lead-out piece 21 and the static spring piece 22 roughly form an inverted U-shape (or a V-shape).
  • One end of the static spring piece 22 is riveted and fixed to the static spring lead-out piece 21, but not limited thereto. In other embodiments, one end of the static spring piece is welded and fixed with the static spring lead-out piece.
  • the magnetic circuit part includes a yoke 5, an armature 4, and a coil former 3 equipped with an iron core and enameled wire.
  • the coil former 3 is erected on the base 1, the armature 4 is arranged at the knife edge of the yoke 5 and is matched with the moving spring part and the iron core.
  • the static spring lead-out piece 21 is vertical, and its bottom end is inserted into the base 1, and its top end is connected to one end of the static spring piece 22 in the above-mentioned fixed manner. The other end of the static spring lead-out piece 21 faces downward.
  • the coil former is lying on the base.
  • the number of the static spring part 2 is specifically two groups, but not limited to this, the two static spring parts 2 are arranged side by side on the same side of the base 1.
  • the present disclosure also includes an auxiliary moving spring piece 7 provided with an auxiliary moving contact 721, and an auxiliary static spring piece 8 provided with an auxiliary static contact 821, the auxiliary moving spring piece 7 and the auxiliary static spring piece 8 are correspondingly matched, and they are respectively mounted on the coil former 3 and/or the base 1.
  • the auxiliary moving spring piece7 is driven by the armature 4, and the operating state of the auxiliary moving spring piece 7 is opposite to that of the moving spring part. That is, when the moving spring part moves in the direction of attracting and closing, the auxiliary moving spring piece 7 moves in the direction of disconnection, when the moving spring part moves in the disconnecting direction, the auxiliary moving spring piece 7 moves in the sucking and closing direction.
  • the auxiliary moving spring piece 7 includes a vertical first piece body 71 and a horizontal second piece body 72.
  • the bottom of the first piece body 71 passes through the base 1, and the second piece body 72 is in a zigzag shape, the upper end of the second piece body 72 is integrally connected with the top of the first piece body 71, and the upper end of the second piece body 72 and/or the top of the first piece body 71 are limited to the coil former 3.
  • the auxiliary moving contact 721 is provided at the lower end of the second piece body 72, and the second piece body 72 cooperates with the armature 4 to act.
  • the auxiliary static spring piece 8 is roughly L-shaped, and includes a vertical third piece body 81 and a horizontal fourth piece body 82.
  • the bottom of the third piece body 81 passes through the base 1, and the top of the third piece body 81 is integrally connected with one end of the fourth piece body 82, and the top of the third piece body 81 and/or one end of the fourth piece body 82 is limited to the coil former 3, and the other end of the fourth piece body 82 is provided with the auxiliary static contact 821.
  • the auxiliary moving spring piece 7 and the auxiliary static spring piece 8 are inserted into the coil former 3 from the side of the coil former 3, respectively.
  • the top of the coil former 3 is provided with an L-shaped first slot 31 and an L-shaped second slot 32, the upper end of the second piece body 72 and the top of the first piece body 71 are inserted into the first slot 31 from the side of the coil former 3;
  • the top of the third piece body 81 and one end of the fourth piece body 82 are inserted into the second slot 32 from the side of the coil former 3.
  • the bottoms of the first piece body 71 and the third piece body 81 are also inserted into the bottom of the coil former 3 from the side of the coil former 3 respectively.
  • the armature 4 is provided with a driving part 41 for driving the auxiliary moving spring piece 7 to move. Specifically, when the armature 4 moves in a direction that closes the moving contact 91 and the static contact 221, the driving part 41 drives the second piece body 72 to disconnect the auxiliary moving contact 721 from the auxiliary static contact 821; When the driving part 41 releases the second piece body 72, the auxiliary moving spring piece 7 relies on its own reaction force to reset.
  • the driving part 41 and the armature 4 are integrally formed, and the driving part 41 can be sleeved with an insulating sleeve, through which the creepage distance between the auxiliary contact unit and the enameled wire of the magnetic circuit part is increased.
  • the moving spring part includes a rigid moving spring piece 9 provided with a moving contact 91, the moving spring piece 9 is relatively fixed to the armature 4.
  • the moving spring piece 9 is connected by a plastic part 10 by insert injection molding or glue dispensing.
  • the armature 4 is roughly L-shaped, and one side is set at the knife edge of the yoke 5 and matched with the pole face of the iron core, and the other side faces downward and is connected to the moving spring piece 9 through the injection molded part 10.
  • a restoring spring piece 6 is inserted between the yoke 5 and the base 1, and the restoring spring piece 6 limits the armature 4 and provides the armature 4 to reset.
  • the armature 4 when the coil (ie, enameled wire) is excited, under the action of electromagnetic attraction, the armature 4 is attracted to the iron core, the rotation of the armature 4 drives the moving spring piece 9 to rotate, so that the moving contact 91 is in contact with the static contact 221, and the main contact is conducted. At the same time, the driving part 41 on the armature 4 pushes the auxiliary moving spring piece 7 to disconnect the originally closed auxiliary contact (that is, the auxiliary moving contact 721 is separated from the auxiliary static contact 821).
  • the moving contact 91 and the static contact 221 When the moving contact 91 and the static contact 221 are just in contact, the moving contact 91 and the static contact 221 have an elastic pre-pressure, and the static spring piece 22 is pushed by the moving spring piece 9 to be further deformed and pre-compressed until the other end of the static spring piece 22 touches the side groove wall of the limiting slot 11 far away from the moving spring piece 9, as shown in FIG. 4 .
  • the moving contact 91 and the static contact 221 are in reliable contact, which reduces the bounce of the contact and improves the contact stability of the contact.
  • the moving contact 91 When the coil is de-energized, if the moving contact 91 and the static contact 221 are bonded, the moving contact 91 will drive the static contact 221 to move in the direction of disconnection under the action of the reaction force of the restoring spring piece 6. Make the other end of the static spring piece 22 touch a side wall of the base limiting slot 11 close to the moving spring piece 9 at a certain speed. Thereby, a certain "knocking force" is generated, which helps the originally bonded moving and static contacts to be disconnected and plays a role in resisting contact bonding. At the same time, the moving contact 91 continues to move in the direction of disconnection under the action of the reaction force of the restoring spring piece 6 to further disconnect the bonded contact.
  • the static spring piece 22 receives the electric power F1 to the right (the direction that makes the static contact 221 and the moving contact 91 fit tighter), due to the current contraction at the contact point on the contacts, an electrodynamic repulsion force F2 is generated on the static contact 221, and an electrodynamic repulsion force F3 is generated on the moving contact 91.
  • the electrodynamic repulsion force F2 repels the electrodynamic repulsive force F3.
  • the electric power F3 acting on the moving contact 91 can be offset due to the electromagnetic attraction on the armature 4.
  • the moving contact 91 and the static contact 221 when the moving contact 91 and the static contact 221 are just in contact, the moving contact 91 and the static contact 221 have an elastic pre-pressure, and the static spring piece 22 is pushed by the moving spring piece 9 to be further deformed and pre-compressed until the other end of the static spring piece 22 touches the side groove wall of the limiting slot 11 far away from the moving spring piece 9, as shown in FIG. 4 . Therefore, when the present disclosure passes short-circuit current, under the action of the electric power and elastic pre-pressure of the static spring piece 22 that are not offset by the electrodynamic repulsion force, the moving contact 91 and the static contact 221 will not be repelled, but can also be firmly contacted together.
  • the present disclosure uses rigid moving spring piece, when the present disclosure passes short-circuit current, the rigid moving spring piece will not be deformed under the action of electrodynamic repulsion force, thereby further improving the ability of the present disclosure to withstand short-circuit currents.
  • the disclosure also adopts elastic static spring piece to provide pre-pressure for the contact state of the moving and static contacts to ensure the contact stability of the contacts.
  • An electromagnetic relay capable of resisting short-circuit current has an anti-short-circuit structure arranged in the static spring part 2, and the static spring part 2 is divided into a static spring lead-out piece 21 and a static spring piece 22, and no need to add additional transmission parts (such as push card), simple structure, convenient assembly, low cost, especially suitable for electromagnetic relays with compact structure and small volume.
  • the special structure design of the static spring part 2 of the present disclosure greatly improves the short-circuit current resistance of the present disclosure, and on the other hand, it can improve the anti-adhesion performance of the relay in the process of breaking the load.
  • the static spring piece of the electromagnetic relay in the prior art is in a fixed form and has no deformability. Based on the characteristics of the static spring piece and the static contact on it, those skilled in the art generally believe that the static spring piece is in a static state and is not easily deformed. After being fixed, it cannot provide additional force for the static contact to make the moving and static contacts contact more reliable.
  • the existing anti-short-circuit current structure is generally applied to the moving spring part, except for a part of the electric power generated thereof to overcome the electric repulsive force on the contacts, since the static spring part of the prior art is fixed, the rest all act on the moving spring piece to make the moving and static contacts come into close contact.
  • this structure also needs to add a drive mechanism such as a push card to push the moving spring piece to realize the connection and disconnection of the moving and static contacts, which increases the complexity of the structure and increases the parts.
  • a drive mechanism such as a push card
  • the present disclosure designs the anti-short circuit structure in the static spring part, through the traditional magnetic circuit structure to realize the connection and disconnection of the moving and static contacts, no additional transmission structure is required, parts are reduced, the structure complexity is reduced, and the product volume is reduced to a certain extent.
  • a limiting slot is provided on the base, so that the static spring piece has a certain pre-pressure, and the limiting slot plays a limiting role at the same time.
  • the limiting slot restricts the static spring piece to continue to move to ensure that the moving contact will not shake open under the action of electric power (This is because the moving spring part is not completely fixed, but is maintained at a certain position by the armature holding force. When the electric power on the static spring piece is large enough, it may cause the armature to fail to hold and the moving contact to shake off). At the same time, the anti-adhesive ability of the product is improved.
  • the electromagnetic relay capable of resisting short-circuit current of the present disclosure is the same as the prior art for the parts not involved or can be realized by the prior art.
  • an electromagnetic relay capable of resisting short-circuit current of the present disclosure which is different from the above-mentioned embodiment one in: the coil former 3 and/or the base 1 of the present disclosure do not have the auxiliary moving spring piece and the auxiliary static spring piece, and the armature 4 is also not provided with the driving part.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (11)

  1. Relais électromagnétique capable de résister à un courant de court-circuit, le relais électromagnétique comprenant :
    une base (1),
    une partie de circuit magnétique,
    une partie de ressort statique (2) et
    une partie de ressort mobile,
    dans lequel la partie de ressort statique (2) comprend une pièce de sortie de ressort statique (21) et une pièce de ressort statique élastique (22), la pièce de sortie de ressort statique (21) étant agencée sur la base (1),
    caractérisé en ce que la pièce de ressort statique (22) est dotée d'un contact statique (221), la pièce de ressort statique (22) étant connectée à la pièce de sortie de ressort statique (21) de sorte qu'une force électrique est générée entraînant la pièce de ressort statique (22) dans une direction vers la partie de ressort mobile lorsque la pièce de ressort statique et la partie de ressort mobile sont dans un état excité, la force électrique résistant à une force électrique répulsive reçue par le contact statique (221) dans l'état excité.
  2. Relais électromagnétique capable de résister à un courant de court-circuit selon la revendication 1, dans lequel la force électrique est supérieure à la force électrique répulsive, et/ou, dans un état où le contact statique (221) est en contact avec un contact mobile (91) de la partie de ressort mobile, la pièce de ressort statique (22) génère une pré-pression élastique orientée vers la partie de ressort mobile.
  3. Relais électromagnétique capable de résister à un courant de court-circuit selon la revendication 1 ou 2, dans lequel une extrémité de la pièce de ressort statique (22) est connectée à la pièce de sortie de ressort statique (21), et la base (1) est dotée d'une structure de limitation, la structure de limitation empêche une autre extrémité de la pièce de ressort statique (22) de se déplacer vers la partie de ressort mobile et/ou la pièce de sortie de ressort statique (21), ou la structure de limitation restreint une course de mouvement de l'autre extrémité de la pièce de ressort statique (22) se déplaçant vers la partie de ressort mobile et/ou la pièce de sortie de ressort statique (21).
  4. Relais électromagnétique capable de résister à un courant de court-circuit selon la revendication 3, dans lequel la pièce de ressort statique (22) est dans un état de pré-pression élastique à travers la structure de limitation avant que le contact statique n'entre en contact avec le contact mobile (91) de la partie de ressort mobile.
  5. Relais électromagnétique capable de résister à un courant de court-circuit selon la revendication 3, dans lequel la structure de limitation est une fente de limitation (11), et l'autre extrémité de la pièce de ressort statique (22) est insérée dans la fente de limitation (11) ; lorsque le contact statique (221) est en contact avec le contact mobile (91), il existe un espace prédéfini entre l'autre extrémité de la pièce de ressort statique (22) et une paroi de fente de la fente de limitation (11) proche de la partie de ressort mobile.
  6. Relais électromagnétique capable de résister à un courant de court-circuit selon la revendication 1, dans lequel la pièce de sortie de ressort statique (21) et la pièce de ressort statique (22) forment une forme de U ou une forme de V ; la pièce de ressort statique (22) et la pièce de sortie de ressort statique (21) sont rivetées ou soudées.
  7. Relais électromagnétique capable de résister au courant de court-circuit selon la revendication 1, dans lequel la partie de circuit magnétique comporte une culasse (5), une armature (4) et un formeur de bobine (3) équipé d'un noyau de fer et d'un fil émaillé, le formeur de bobine (3) est agencé sur la base (1), et l'armature (4) est agencée au niveau d'un bord de couteau de la culasse (5) et est mise en correspondance avec la partie de ressort mobile et le noyau de fer.
  8. Relais électromagnétique capable de résister à un courant de court-circuit selon la revendication 7, dans lequel comprend en outre une pièce de ressort mobile auxiliaire (7) dotée d'un contact mobile auxiliaire (721) et une pièce de ressort statique auxiliaire (8) dotée d'un contact statique auxiliaire (821), la pièce de ressort mobile auxiliaire (7) et la pièce de ressort statique auxiliaire (8) sont adaptée de manière correspondante, et elles sont respectivement montées sur le formeur de bobine (3) et/ou la base (1), la pièce de ressort mobile auxiliaire (7) est reliée à l'armature (4), et un état d'action de la pièce de ressort mobile auxiliaire (7) est opposé à un état d'action de la partie de ressort mobile.
  9. Relais électromagnétique capable de résister à un courant de court-circuit selon la revendication 8, dans lequel la pièce de ressort mobile auxiliaire (7) comprend un premier corps de pièce vertical (71) et un second corps de pièce horizontal (72), le premier corps de pièce (71) est connecté d'un seul tenant au second corps de pièce (72), et un fond du premier corps de pièce (71) traverse la base (1), le second corps de pièce (72) est en forme de Z et/ou est pourvu d'une structure creuse, et le second corps de pièce (72) est pourvu d'un contact mobile auxiliaire (721) et est relié à l'armature (4); la pièce de ressort mobile auxiliaire (7) et la pièce de ressort statique auxiliaire (8) sont respectivement insérées dans le formeur de bobine (3) depuis un côté du formeur de bobine (3) ; l'armature (4) est dotée d'une partie d'entraînement (41) pour entraîner le déplacement du second corps de pièce (72).
  10. Relais électromagnétique capable de résister à un courant de court-circuit selon la revendication 7, dans lequel la partie de ressort mobile comprend une pièce de ressort mobile rigide (9) dotée d'un contact mobile (91), et la pièce de ressort mobile rigide (9) est relativement fixée à l'armature (4) ; une pièce de ressort de rappel (6) est insérée entre la culasse (5) et la base (1), et la pièce de ressort de rappel (6) limite l'armature (4) et permet à l'armature (4) de se réinitialiser.
  11. Relais électromagnétique capable de résister à un courant de court-circuit selon la revendication 10, dans lequel la pièce de ressort mobile rigide (9) et l'armature (4) sont connectées ensemble par une pièce en plastique (10) par moulage par injection d'insert ou distribution de colle.
EP21275109.3A 2020-08-20 2021-08-11 Relais électromagnétique capable de résister à un courant de court-circuit Active EP3958283B1 (fr)

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CN115798995B (zh) * 2022-12-15 2024-03-15 浙江广威电子有限公司 一种便于检修的磁保持继电器
CN117238725B (zh) * 2023-11-16 2024-03-26 东莞市元则电器有限公司 一种高压直流继电器

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CN102903576B (zh) * 2012-10-27 2015-06-03 东莞市三友联众电器有限公司 磁保持继电器的簧片开关组件

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