EP2148344A2 - Micro-interrupteur - Google Patents

Micro-interrupteur Download PDF

Info

Publication number
EP2148344A2
EP2148344A2 EP09008713A EP09008713A EP2148344A2 EP 2148344 A2 EP2148344 A2 EP 2148344A2 EP 09008713 A EP09008713 A EP 09008713A EP 09008713 A EP09008713 A EP 09008713A EP 2148344 A2 EP2148344 A2 EP 2148344A2
Authority
EP
European Patent Office
Prior art keywords
spring
contact
tongue
spring tongue
switch according
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
EP09008713A
Other languages
German (de)
English (en)
Other versions
EP2148344A3 (fr
EP2148344B1 (fr
Inventor
Martin Koepsell
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.)
Johnson Electric SA
Original Assignee
Saia Burgess Oldenburg GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saia Burgess Oldenburg GmbH and Co KG filed Critical Saia Burgess Oldenburg GmbH and Co KG
Priority to PL09008713T priority Critical patent/PL2148344T3/pl
Publication of EP2148344A2 publication Critical patent/EP2148344A2/fr
Publication of EP2148344A3 publication Critical patent/EP2148344A3/fr
Application granted granted Critical
Publication of EP2148344B1 publication Critical patent/EP2148344B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
    • H01H5/22—Energy stored by deformation of elastic members by flexing of blade springs blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
    • H01H13/40—Blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg

Definitions

  • the invention relates to an electrical switch, in particular a micro-switch, with at least one contact spring, which can be converted into different switch positions by an actuator, which is arranged on an armature formed as an electrical contact.
  • Electrical switches of the aforementioned type such as microswitches or the like, are used in particular in measurement and control technology in order to be able to spontaneously and unambiguously carry out the switching operations, which are frequently to be carried out in corresponding current and control circuits in these application areas, with a particularly high repeatability.
  • the electrical switches used for these special switching operations usually have a respective the switch positions of the micro-switch determining, a tilting movement during actuation exporting contact spring.
  • a mechanical actuator such as a housing of the microswitch penetrating plunger, the contact area of the contact spring of a switching position and with the contact area in Plant standing current conductive contact in the other switching position and thus transferred into contact with another contact.
  • the distance between the contacts of the electric switch which can be used, for example, as normally open, normally closed or change-over, is generally only one tenth of a millimeter to a few millimeters.
  • the contact springs used in such electrical switches for implementing the switching operation form a tilting system, which is mechanically guided, inter alia, to minimize the contact friction occurring between the contact region of the contact spring and a respective current-conducting contact of the microswitch.
  • the outer guide is also necessary to carry out a defined, unambiguous movement, frequently causing a deteriorated function of the switch due to the friction hysteresis.
  • the formation of a contact spring in the direction of actuation of the actuator receiving guide also always means a structurally complex design of the switch and is connected at the same time with a correspondingly high cost.
  • the invention is based on the object to improve an electrical switch of the aforementioned type to the effect that this can be simplified and therefore produced inexpensively.
  • the contact spring has a closed spring frame, the spring frame two , Be arranged in approximately opposite directions extending spring tongues pliable, wherein the first spring tongue is formed as a return for the actuator, and the second spring tongue controls the switching function of the contact region of the contact spring, and that the spring tongues engage abutting surface areas of the armature so supporting in that the contact spring has a permanent stable position during its actuation.
  • the first spring tongue formed as a return spring for the actuating member is a folded-out spring leaf loaded with compressive stress at least in its longitudinal direction.
  • the use of a spring leaf provides a structurally advantageous possibility for forming the preferably flexibly received, first spring tongue.
  • the spring tongue also located in buckling case also generates a degressive spring characteristic during actuation, whereby the wear on the actuator, which may be formed, for example, as a plunger even with relatively large travel distances can be kept low with advantage.
  • With the use of a spring leaf is also ensured that in addition to the advantageous return function for the actuator at the same time one of second spring tongue counteracting spring force is generated, by means of which an advantageous balance of each acting in opposite directions spring forces of the spring tongues is created.
  • the first spring tongue preferably has, in one of the switching positions of the contact spring, a leg section extending from the articulation point on the spring frame, approximately parallel to the spring frame plane, followed by at least one further leg section having an approximately uniformly curved course.
  • the actuator located in its rest position or the upper end position is permanently acted upon by the always elastically deformed spring tongue with a spring force.
  • the spring frame of the contact spring Upon actuation of the actuator, in particular, the spring frame of the contact spring performs a tilting movement. Trained as a retractor spring tongue is further buckled by acting on them, increasing compressive stress and may have after reaching the lower end leg leg sections that have both different radii of curvature and different directions of curvature.
  • the second spring tongue of the contact spring has a curved shape.
  • a preferably plastically deformed spring tongue an advantageously improved switching function or snap movement of the second spring tongue is effected, which after reaching the switching position by the actuating member abruptly performs a change in the switching position of the contact region of the contact spring.
  • the spring tongue has, in particular, a relatively stiff configuration or has a kink-stiffener geometry, whereby a transition into the buckling case is advantageously prevented even with a relatively high pressure force acting in the longitudinal direction of the spring tongue.
  • the second spring tongue can of course also be straight.
  • the first spring tongue has in relation to the second spring tongue at approximately the same cross-section on a larger length, which in particular ensures that only one of the spring frame of the contact spring in particular integrally formed spring tongues buckles at a force acting in the longitudinal direction of the spring pressure force. This has an advantageous effect on improving the stable position of the contact spring within the microswitch despite the ungauged movement of the contact spring.
  • the length dimension of the first spring tongue is at least twice as long as the length dimension of the second spring tongue.
  • each spring tongue in the region of its articulation on the spring frame has a constriction which reduces its cross-section.
  • an advantageous joint-like connection of the spring tongues to the otherwise relatively stiff formed spring frame of the contact spring is generated.
  • this is an optimal deformation of the buckled, first spring tongue in response to the Switching position of the contact spring achieved and on the other hand, the differential path between switching position and rubschaltlage reduce with advantage.
  • the switching path is minimized, which in turn has an advantageous effect on the switching behavior of such inventively designed electrical switch.
  • the contact region of the contact spring which is assigned to the second spring tongue controlling the switching process, is designed as a rolled-up hollow mold section, which represents an advantageously simple possibility for forming the contact region which can be brought into contact with the contacts of the microswitch. Furthermore, it is ensured by the formation of the contact region as a hollow mold section and the resulting relatively low mass, during the switching operation, an advantageous low-vibration placement of the surface of the contact area to a respective contact surface of the microswitch.
  • the formed as a hollow mold portion contact area is arranged in particular at an end portion of the spring frame, from which extends the second spring tongue approximately in the direction of the opposite end.
  • the articulated at the armature supporting contact spring it is provided that the articulation point is formed for the second spring tongue in the rolled-up hollow mold portion of the contact spring.
  • the connection of the second spring tongue is preferably in an area above the Federrahmenebene, whereby in particular the remindschaltlage or the reset point is shifted with advantage in the direction of the switching position and the switching point.
  • the spring tongues which are preferably arranged at opposite ends of the contact spring, engage parallel to each other staggered portions of the particular angled trained anchor.
  • the spring tongues which are preferably arranged at opposite ends of the contact spring, engage parallel to each other staggered portions of the particular angled trained anchor.
  • a micro-switch which has at least one housing 2 and a housing 3 penetrating actuator 3, which in turn is in contact with a convertible into different switching positions contact spring 4.
  • the contact spring 4 has a closed spring frame 5, are arranged on the two, approximately in opposite directions extending spring tongues 6, 7 pliable.
  • the spring tongues 6, 7 are in particular formed integrally with the spring frame 5, and are supported on both sides on an electrical contact Anchor 8 off.
  • a first spring tongue 6 is an unfolded spring leaf which is loaded at least in its longitudinal direction and which also serves as a return spring for the actuating member 3.
  • the second spring tongue 7 controls the switching function of a contact region 9 formed on the contact spring 4, which switches back and forth between a top contact 10 and a bottom contact 11 upon a corresponding actuation of the contact spring 4.
  • the second spring tongue always leads on reaching the switching position or the rinseschaltlage by the actuator 3 a spontaneous and unambiguous Umklappmony.
  • Fig. 2 the actuated micro-switch 1 is shown, wherein the actuator designed as a plunger 3 is in its end position.
  • the contact spring 4 has then carried out a tilting movement, and lies with its contact region 9 on the lower contact 11.
  • the first spring tongue 6 is further buckled by the increased compressive stress in its longitudinal direction, but the spring tongue 6 is deformed only elastically and thus after removal of the force acting on the actuator 3 this automatically by the first spring tongue 6 in its rest position ( Fig. 1 ) is moved back.
  • the second spring tongue 7 in its upper switching position, so that the contact portion 9 of the contact spring 4 in turn rests on the upper contact 10.
  • the current-carrying armature 8 is angled so that the free ends of the spring tongues 6, 7 engage supportingly at parallel staggered sections 12, 13 of the armature 8.
  • a sealing region sealingly closing the opening portion 15 is provided, which is integrally formed on the housing 2 and the actuator 3 in a form-fitting manner.
  • Fig. 3 shows in particular the coming into use in microswitch 1 contact spring 4 in an enlarged view, in particular to illustrate their design.
  • the contact spring 4 is shown in the installed state, so that the first spring tongue 6 is shown led out of its actual resting in the plane of the spring frame 5 rest position.
  • the spring frame 5 of the contact spring 4 has at one end always with the actuator 3 ( Fig. 1 ) in contact bearing surface 16, which is formed curved due to the export by the contact spring tilting movement.
  • At the opposite end of the spring frame 5 of each standing with the upper contact 10 or the lower contact 11 in contact contact area 9 is formed, which is preferably a rolled-up hollow mold section.
  • first spring tongue 6 in relation to the second spring tongue 7 at least twice the length, so that it is ensured that only the first spring tongue 6 buckles at a compressive stress acting in its longitudinal direction.
  • the second spring tongue 7 is always relatively stable in spite of their flexurally flexible articulation on the spring frame 5 and has, as Fig. 3 illustrates already in the delivery state a curved shape, which always leads to a spontaneous or sudden switching of the second spring tongue 7 when reaching the switching position.
  • Fig. 4 shows a second embodiment of a contact spring 17 according to the invention, which is in particular equipped with a bending out of the plane of the spring frame 5, bend soft-shaped, but straight extending second spring tongue 18. Identical components are designated by the same reference numbers.

Landscapes

  • Push-Button Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
EP09008713.1A 2008-07-26 2009-07-03 Micro-interrupteur Active EP2148344B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09008713T PL2148344T3 (pl) 2008-07-26 2009-07-03 Mikroprzełącznik

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008035043A DE102008035043B4 (de) 2008-07-26 2008-07-26 Mikroschalter

Publications (3)

Publication Number Publication Date
EP2148344A2 true EP2148344A2 (fr) 2010-01-27
EP2148344A3 EP2148344A3 (fr) 2010-08-25
EP2148344B1 EP2148344B1 (fr) 2016-02-10

Family

ID=41168432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09008713.1A Active EP2148344B1 (fr) 2008-07-26 2009-07-03 Micro-interrupteur

Country Status (6)

Country Link
EP (1) EP2148344B1 (fr)
CN (1) CN101685719B (fr)
DE (1) DE102008035043B4 (fr)
ES (1) ES2574762T3 (fr)
HU (1) HUE028763T2 (fr)
PL (1) PL2148344T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013018448A1 (de) 2013-11-05 2015-05-21 Johnson Electric Germany GmbH & Co. KG Sprungschalter
CN110176372B (zh) * 2019-05-31 2021-10-22 无锡市创新开关电器有限公司 密封型直流微动开关

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472827A1 (fr) * 1979-12-26 1981-07-03 Crouzet Sa Commutateur a action brusque
DE8915158U1 (de) * 1989-12-23 1990-02-08 Grässlin KG, 7742 St. Georgen Schnappfeder für einen elektrischen Schalter mit zwei definierten Schaltstellungen, insbesondere für einen sogenannten Mikroschalter
DE29615991U1 (de) * 1996-09-14 1998-01-22 Hans-Georg Hartmann Kg, 73614 Schorndorf Schaltfeder
DE19745803C1 (de) * 1997-10-16 1999-07-01 Inovan Stroebe Kontaktfeder für einen Mikroschalter mit Überhub

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9305074U1 (de) * 1993-04-02 1993-06-09 Schaltbau AG, 8000 München Mikroschalter
DE102004035193A1 (de) * 2004-07-21 2006-02-16 Schaltbau Gmbh Mikroschalter
DE102006043795B3 (de) * 2006-09-19 2008-05-29 Saia-Burgess Oldenburg Gmbh & Co. Kg Elektrischer Mikroschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472827A1 (fr) * 1979-12-26 1981-07-03 Crouzet Sa Commutateur a action brusque
DE8915158U1 (de) * 1989-12-23 1990-02-08 Grässlin KG, 7742 St. Georgen Schnappfeder für einen elektrischen Schalter mit zwei definierten Schaltstellungen, insbesondere für einen sogenannten Mikroschalter
DE29615991U1 (de) * 1996-09-14 1998-01-22 Hans-Georg Hartmann Kg, 73614 Schorndorf Schaltfeder
DE19745803C1 (de) * 1997-10-16 1999-07-01 Inovan Stroebe Kontaktfeder für einen Mikroschalter mit Überhub

Also Published As

Publication number Publication date
ES2574762T3 (es) 2016-06-21
DE102008035043A1 (de) 2010-02-04
PL2148344T3 (pl) 2017-08-31
DE102008035043B4 (de) 2013-04-04
CN101685719B (zh) 2014-08-20
HUE028763T2 (en) 2017-01-30
EP2148344A3 (fr) 2010-08-25
CN101685719A (zh) 2010-03-31
EP2148344B1 (fr) 2016-02-10

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