CN102903575A - Contact device and electromagnetic relay including same - Google Patents

Contact device and electromagnetic relay including same Download PDF

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Publication number
CN102903575A
CN102903575A CN2012102618550A CN201210261855A CN102903575A CN 102903575 A CN102903575 A CN 102903575A CN 2012102618550 A CN2012102618550 A CN 2012102618550A CN 201210261855 A CN201210261855 A CN 201210261855A CN 102903575 A CN102903575 A CN 102903575A
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CN
China
Prior art keywords
contact
protrusion
holding
contact point
fixed
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.)
Granted
Application number
CN2012102618550A
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Chinese (zh)
Other versions
CN102903575B (en
Inventor
奥田晃弘
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Matsushita Electric Industrial Co Ltd
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Publication of CN102903575A publication Critical patent/CN102903575A/en
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Publication of CN102903575B publication Critical patent/CN102903575B/en
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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
    • 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
    • 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
    • H01H1/28—Assembly of three or more contact-supporting spring blades
    • 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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/641—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rectilinear movement
    • H01H50/642—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rectilinear movement intermediate part being generally a slide plate, e.g. a card
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2227—Polarised relays in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit
    • 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
    • H01H2001/265—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support having special features for supporting, locating or pre-stressing the contact blade springs

Abstract

A contact device includes a contact point retainer configured to hold a movable contact point in one end portion thereof. The contact point retainer includes a plurality of contact point retaining springs superimposed in a thickness direction and formed of leaf springs and a housing configured to fix the other end portion of the contact point retainer and hold a fixed contact point in a position where the movable contact point can come into contact with or out of contact with the fixed contact point in response to elastic deformation of the contact point retainer. Each of the contact point retaining springs includes a bulging portion swelling away in a direction parallel or substantially parallel to a direction from the movable contact point and toward the fixed contact point.

Description

Contact devices and the electromagnetic relay that comprises this contact devices
Technical field
The present invention relates to the electromagnetic relay of a kind of contact devices and this contact devices of use.
Background technology
Traditionally, have a kind of like this contact devices, as shown in Figure 2, moving contact 51 supports by the holding contact spring 71 that is comprised of the leaf spring, and can pass through the strain of holding contact spring 71 with respect to fixed contact 52 displacements (for example, referring to Japanese utility model application publication number S63-37052).This contact devices for example is used in the electromagnetic relay, and wherein moving contact 51 is by the magnetic drive of electromagnet.
In this respect, if large electric current flows, between moving contact 51 and fixed contact 52, produce repulsive force between moving contact 51 and fixed contact 52.For example, if large electric current according to direction shown in the arrow A among Fig. 23 (namely, from fixed contact 52 towards moving contact 51) flow the electric current of the contact area 50 by shown in arrow A 4, flowing into fixed contact 52 and shown in arrow A 5, flow out the electromagnetic force that the electric current of the contact area 50 of moving contact 51 produces and shown in arrow A 6, move apart the repulsive force of fixed contact 52 as moving contact 51 by it.If open (that is, moving contact 51 is from the separation of fixed contact 52) of contact, may appear greater than the spring force of holding contact spring 71 in repulsive force.
During opening, the contact producing in the situation of arc discharge between moving contact 51 and the fixed contact 52, has moving contact 51 and the fixed contact 52 thermal weld possibility together by being caused by arc discharge.
Summary of the invention
In view of more than, the invention provides and a kind ofly can stop the contact devices that the contact of being caused by large electric current opens and the electromagnetic relay that uses this contact devices.
According to an aspect of the present invention, provide a kind of contact devices, having comprised: structure comes the holding contact device at one end portion supports moving contact, this holding contact device comprise a plurality of at thickness direction holding contact spring stacked and that formed by the leaf spring; Fix the other end of holding contact device with structure and keep fixed contact to be in the shell of the position that strain that moving contact can respond the holding contact device contacts or disengage with fixed contact, wherein each holding contact spring comprises according to parallel or be basically parallel to the protrusion of heaving towards the direction of fixed contact from moving contact.
Between the protrusion of the protrusion of at least one holding contact spring and the holding contact spring adjacent with described at least one holding contact spring, can there be the gap.
Protrusion can comprise by angled sweep a plurality of flats connected to one another.
Protrusion can comprise upper part and the lower part that is parallel to each other extension.
Above-mentioned device can also comprise being electrically connected to fixed contact and stretching out the outer mode of shell with the part and be supported on terminal block in the shell that protrusion is positioned near the terminal block.
Electromagnetic relay can comprise: above-mentioned contact devices; Deposit and support electromagnet in the enclosure; With deposit in the enclosure and by the armature of the magnetic drive of electromagnet,
Wherein constructing moving contact moves with armature and contacts or disengage with fixed contact.
Utilize present embodiment, when large current flowing, the repulsive force that produces between protrusion one end and the other end is used for making the holding contact spring according to this Direction distortion, so that presses moving contact against fixed contact.Therefore can stop opening of contact.
Description of drawings
With reference to the following explanation of accompanying drawing by embodiment, purpose of the present invention and feature will become apparent, wherein:
Fig. 1 shows according to an embodiment of the invention for the clear front view of removing the electromagnetic relay of lid; With
Fig. 2 shows the schematic diagram by the problem to be solved in the present invention.
Embodiment
Hereinafter, describe a preferred embodiment of the present invention in detail now with reference to forming its a part of accompanying drawing.
As shown in Figure 1, comprise electromagnet 1 according to the electromagnetic relay 100 of present embodiment, the armature 2 that is driven rotatably by the magnetic force of electromagnet 1 and the shell 3 that is used for holding electromagnet 1 and armature 2.Electromagnet 1 is fixed to shell 3.In other words, present embodiment relates to the rotation of the 51 response armature 2 of moving contact wherein and the electromagnetic relay 100 that operates.In the following description, upper and lower a, left side and right side will be defined based on Fig. 1.Among Fig. 1 the front side of drawing will be called " front " and among Fig. 1 the rear side of drawing will be called
" afterwards ".But these directions just define for convenience of description, may not meet the direction under actual service conditions.
The lid (not shown) of depositing groove 30 is closed in the front side that shell 3 comprises the main body of depositing groove 30 31 with its front openings and is connected to main body 31.
Electromagnetic relay 100 comprises for the supportive body 4 that rotatably supports armature 2 with respect to shell 3.Supportive body 4 comprises that its thickness direction extends and its left and right end portions is fixed to the smooth fixed part 41 of main body 31 and the outstanding cylindric axial region 42 forward from the central area of the front surface of fixed part 41 at front-rear direction.Axially extending at front-rear direction of axial region 42.As the device that is used for fixed part 41 is fixed to main body 31, can use the well-known device such as joint etc.Armature 2 has the support holes 20 with circular cross section.Support holes 20 is passed armature 2 at front-rear direction and is extended.The internal diameter of support holes 20 is slightly greater than the external diameter of axial region 42.Axial region 42 inserts support holes 20, thereby armature 2 supports with respect to shell 3, so that rotates around the central axis of axial region 42.
The rear side that electromagnet 1 is included in fixed part 41 is fixed to the coil (not shown) of main body 31, so that it axially extends in upper-lower direction, and by the magnetic material manufacturing with by the pole piece 11 of coil magnetizing.Pole piece 11 is included in-and lower direction passes main part (not shown) that coil extends and from the upper and lower side of the main part outstanding 11a of variable magnetic pole section forward.Thereby pole piece 11 has basic U shape shape on the whole.More specifically, the 11a of variable magnetic pole section is magnetized to opposed polarity according to the flow direction that is fed to the electric current of coil.The polarity of the 11a of variable magnetic pole section differs from one another.A plurality of (among Fig. 1 three) winding wiring 60 is supported in the shell 3.Winding wiring 60 is electrically connected to coil at the one end.The other end of winding wiring 60 is outstanding towards the left side of shell 3.Electric current supplies to coil by winding wiring 60.More specifically, the electromagnetic relay 100 according to present embodiment is so-called twin coil latching-type.Coil is provided with tap.Winding wiring 60 is electrically connected to the tap of end opposite and coil.
Armature 2 comprises two couples of quiet magnetic pole piece 21a, is located at respectively its upper and lower end parts.Each 11a of variable magnetic pole section is inserted between every couple of quiet magnetic pole piece 21a.In every couple of quiet magnetic pole piece 21a, the quiet magnetic pole piece 21a that is present in the 11a of variable magnetic pole section left side is geomagnetic into opposed polarity with the quiet magnetic pole piece 21a that is present in variable magnetic pole section 11a right side.More specifically, armature 2 comprises that the N utmost point is oriented in two permanent magnets 22 of an identical left side or right, and two armature elements 21 being made by magnetic material and permanent magnet 22 and armature element 21 utilize it to insert the molding synthetic resin main body 23 of moulding.Each armature element 21 magnetically is installed to the magnetic pole of each permanent magnet 22.Upwards the outstanding opposite ends that surpasses each armature element 21 of each permanent magnet 22 is used as quiet magnetic pole piece 21a downwards.
If electric current is fed to the coil of electromagnet 1, one of the quiet magnetic pole piece 21a that is present in the left and right sides of corresponding variable magnetic pole piece 11a attracted to the corresponding 11a of variable magnetic pole section according to the sense of current of flowing through coil, thereby armature 2 is with respect to shell 3 rotations.In case electric current is fed to coil, (locking) kept by the magnetic force of permanent magnet 22 in the position of armature 2 (with the position of the moving contact 51 that moves with armature 2), until electric current is according to the rightabout flowing through coil.
With the moving contact 51 of the rotation campaign of armature 2 with leave in the shell 3 with fixed contact 52 that moving contact 51 contacts or disengages.Moving contact 51 and fixed contact 52 are electrically connected to respectively terminal block 61 and 62.In other words, the electrical connection between terminal block 61 and 62 is along with moving contact 51 contacts or disengages and switch on and off with fixed contact 52. Terminal block 61 and 62 each formed by the metallic plate that its thickness direction extends in the L-R direction.Terminal block 61 and 62 each stretch out the outer modes of shell 3 according to its upper end and be fixed to shell 3.Electromagnetic relay 100 according to present embodiment comprises holding contact device 7.The bottom of holding contact device 7 is fixed to the right surface of terminal block 61 and the upper end of holding contact device 7 is elastically deformables, so as with respect to the bottom of holding contact device 7 according to the displacement of L-R direction.In other words, moving contact 51, fixed contact 52, holding contact device 7 and shell 3 consist of contact devices.Moving contact 51 is fixed to the upper end of holding contact device 7, thus moving contact 51 can be with respect to shell 3 in the left side of fixed contact 52 according to the flexibly displacement of L-R direction.
Electromagnetic relay 100 according to present embodiment comprises the card 8 that is connected to holding contact device 7 and armature 2, so that moving contact 51 can be with armature 2 motions.The terminal block 61 that is connected to moving contact 51 is configured as the motion path of not interfering card 8, so that terminal block 61 will not hinder the displacement of card 8.The connector sheet 24 of the upper end of armature 2 and the card 8 right armature element 21 by will being connected to armature 2 inserts upwards, be connected to each other downwards and to the armature concave part 81 of the card 8 of open front.Holding contact device 7 and card 8 make progress by the upper end of holding contact device 7 is inserted, the concave part (not shown) of downward and aft-opening card 8 is connected to each other.
Holding contact device 7 comprises a plurality of holding contact springs 71, its each by forming according to upper-leaf spring that lower direction is extended.Holding contact spring 71 is stacked and end and bottom are bonded to each other thereon at thickness direction.Each holding contact spring 71 comprises the protrusion 71a(that heaves to the right namely, according to parallel or be basically parallel to from the direction of moving contact 51 towards fixed contact 52).Protrusion 71a is formed on each holding contact spring 71 along the basic central part of upper-lower direction.Be present on the protrusion 71a and under the upper and lower end parts of each holding contact spring 71 be smooth, its thickness direction extends in the L-R direction.Protrusion 71a forms by bending process.Protrusion 71a has for example trapezoidal shape, and comprises by with the sweep of obtuse angle three flats connected to one another.The protrusion 71a of holding contact spring 71 forms box-like shape, so that the protrusion 71a of left holding contact spring 71 can be received in the left groove of protrusion 71a of right left holding contact spring 71.The gap is present between the adjacent rises 71a of holding contact spring 71.Particularly, the gap that is present between the protrusion 71a of the protrusion 71a of the most left holding contact spring 71 and the holding contact spring 71 adjacent with the most left holding contact spring 71 forms relative large size.
Utilize said structure, under the large electric current of supply, electric current flows through upper end and the bottom of protrusion 71a according to substantially opposite direction, thereby produces the repulsive force shown in arrow A 1 between the upper end of protrusion 71a and bottom.Repulsive force be used for making holding contact device 7 according to the upper end of holding contact device 7 shown in arrow A 2 with respect to the Direction distortion of its bottom displacement to the right, namely press the direction of fixed contact 52 according to moving contact 51.This can stop the disconnecting of contact.
Because the gap is present in (between the protrusion 71a) between the holding contact spring 71, so by making each holding contact spring 71(according to appropriate mode for example, the most left holding contact spring 71) plastically distortion can the adjusting operation feature.
Form above-mentioned trapezoidal shape more preferably than protrusion 71a, protrusion 71a forms the shape (for example, rectangular shape) that its top and the bottom extend parallel to each other.In the sort of situation, electric current becomes stronger according to flow through top and the bottom and the repulsive force of protrusion 71a of splendid opposite direction.
Protrusion 71a is positioned near the terminal block 62.Preferably, be present in the terminal block 62 of fixed contact 52 sides and the distance between the protrusion 71a and be set to guarantee that insulation ground is as far as possible little.For example, if the size of protrusion 71a is made greatlyr, can make holding contact spring 71 longer.If the position of terminal block 62 arranges to get more close holding contact device 7, can reduce the overall dimensions of electromagnetic relay 100.
Although illustrated and illustrated the present invention with reference to embodiment, the invention is not restricted to this.It should be appreciated by those skilled in the art in the situation that does not break away from the scope of the present invention that following claims define and to make various changes and revision.

Claims (6)

1. contact devices comprises:
The holding contact device, structure comes at one end portion supports moving contact, this holding contact device comprise a plurality of at thickness direction holding contact spring stacked and that formed by the leaf spring; With
Shell, structure fix the other end of holding contact device and fixed contact are supported on the position that strain that moving contact can respond the holding contact device contacts or disengages with fixed contact,
Wherein each holding contact spring comprises along parallel or be parallel in fact the protrusion of heaving towards the direction of fixed contact from moving contact.
2. wherein there is the gap in device according to claim 1 between the protrusion of the protrusion of at least one holding contact spring and the holding contact spring adjacent with described at least one holding contact spring.
3. device according to claim 1, wherein protrusion comprises by angled sweep a plurality of flats connected to one another.
4. device according to claim 3, wherein protrusion comprises and is parallel to upper part and the lower part of extending each other.
5. each described device according to claim 1-4 also comprises:
Be electrically connected to fixed contact and stretch out the outer mode of shell with the part and be supported on terminal block in the shell, protrusion is positioned near the terminal block.
6. electromagnetic relay comprises:
Each contact devices according to claim 1-4;
Deposit and support electromagnet in the enclosure; With
Deposit in the enclosure and by the armature of the magnetic drive of electromagnet,
Wherein the moving contact structure moves with armature and contacts or disengage with fixed contact.
CN201210261855.0A 2011-07-27 2012-07-26 Contact devices and the electromagnetic relay comprising this contact devices Active CN102903575B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011164192A JP5923749B2 (en) 2011-07-27 2011-07-27 Contact device and electromagnetic relay using the contact device
JP164192/2011 2011-07-27

Publications (2)

Publication Number Publication Date
CN102903575A true CN102903575A (en) 2013-01-30
CN102903575B CN102903575B (en) 2016-03-16

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JP (1) JP5923749B2 (en)
CN (1) CN102903575B (en)

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CN104681314A (en) * 2013-11-26 2015-06-03 德昌电机(深圳)有限公司 Electrical Contactor, Movable Contact Assembly And Method For Using Electric Contactor
CN105551896A (en) * 2015-12-22 2016-05-04 厦门宏发电力电器有限公司 Contact assembly and high-voltage direct-current relay thereof
CN106663570A (en) * 2014-11-27 2017-05-10 欧姆龙株式会社 Contact piece unit and relay
CN107408477A (en) * 2015-03-19 2017-11-28 欧姆龙株式会社 Relay

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JP6135168B2 (en) 2013-02-13 2017-05-31 オムロン株式会社 Electromagnetic relay
EP2782110B1 (en) * 2013-03-22 2017-07-05 Tyco Electronics Austria GmbH Lorentz force activated electric switching device
EP2806441B1 (en) * 2013-05-24 2017-07-12 Tyco Electronics Austria GmbH Electric switching device with enhanced Lorentz force bias
JP6393025B2 (en) 2013-07-01 2018-09-19 富士通コンポーネント株式会社 Electromagnetic relay
DE102014112011A1 (en) * 2014-08-21 2016-03-17 Johnson Electric Germany GmbH & Co. KG Bistable small relay of high performance
CN106158513B (en) * 2015-04-15 2018-10-19 浙江正泰电器股份有限公司 The shell mechanism of magnetic latching relay
JP6726156B2 (en) * 2017-12-04 2020-07-22 富士通コンポーネント株式会社 Electromagnetic relay
JP6732986B2 (en) * 2019-03-22 2020-07-29 富士通コンポーネント株式会社 Electromagnetic relay

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN104681314A (en) * 2013-11-26 2015-06-03 德昌电机(深圳)有限公司 Electrical Contactor, Movable Contact Assembly And Method For Using Electric Contactor
CN104681314B (en) * 2013-11-26 2019-01-22 德昌电机(深圳)有限公司 Electric contactor, moveable contact assembly and the method using electric contactor
CN106663570A (en) * 2014-11-27 2017-05-10 欧姆龙株式会社 Contact piece unit and relay
CN106663570B (en) * 2014-11-27 2019-10-18 欧姆龙株式会社 Contact blade unit and relay
CN107408477A (en) * 2015-03-19 2017-11-28 欧姆龙株式会社 Relay
CN107408477B (en) * 2015-03-19 2019-02-01 欧姆龙株式会社 Relay
CN105551896A (en) * 2015-12-22 2016-05-04 厦门宏发电力电器有限公司 Contact assembly and high-voltage direct-current relay thereof
CN105551896B (en) * 2015-12-22 2018-07-27 厦门宏发电力电器有限公司 A kind of contact assembly and its high voltage direct current relay

Also Published As

Publication number Publication date
EP2551868B1 (en) 2015-02-25
CN102903575B (en) 2016-03-16
JP5923749B2 (en) 2016-05-25
JP2013030310A (en) 2013-02-07
EP2551868A1 (en) 2013-01-30

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