EP0268937B1 - Elektrische Kontaktvorrichtung - Google Patents

Elektrische Kontaktvorrichtung Download PDF

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Publication number
EP0268937B1
EP0268937B1 EP87116670A EP87116670A EP0268937B1 EP 0268937 B1 EP0268937 B1 EP 0268937B1 EP 87116670 A EP87116670 A EP 87116670A EP 87116670 A EP87116670 A EP 87116670A EP 0268937 B1 EP0268937 B1 EP 0268937B1
Authority
EP
European Patent Office
Prior art keywords
contact
impact
leaf spring
massive
movable contact
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.)
Expired - Lifetime
Application number
EP87116670A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0268937A1 (de
Inventor
Heinz Dipl.-Phys. Ritter
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 Electric Works Europe AG
Original Assignee
Euro Matsushita Electric Works AG
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 Euro Matsushita Electric Works AG filed Critical Euro Matsushita Electric Works AG
Publication of EP0268937A1 publication Critical patent/EP0268937A1/de
Application granted granted Critical
Publication of EP0268937B1 publication Critical patent/EP0268937B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to an electrical contact device according to the preamble of patent claim 1.
  • a spring-mounted movable contact works together with a likewise spring-mounted counter contact.
  • a mass body On the side facing away from the movable contact, a mass body which is likewise resiliently rests on the mating contact in the rest position. If the movable contact is now actuated by excitation of an electromagnetic coil and it hits the counter contact, the kinetic energy of the movable contact is transferred through the counter contact to the mass body, provided that the masses of the movable contact and the mass body are approximately the same size are, the movable contact and the counter-contact retain no kinetic energy and the counter-contact remains in its rest position, so that the contact closure is maintained without bruising as long as the excitation continues.
  • the mass body is deflected in the direction of impact by the kinetic energy it absorbs and moves away from the back of the counter contact.
  • a permanent magnet which holds the mass body in its deflected position.
  • the mass body is returned to its rest position in that the mass body is detached from the permanent magnet via a bracket which is fastened to the movable contact and moves back with it when the excitation is switched off.
  • this measure continues a correspondingly high restoring force of the spring carrying the movable contact, so that the contact device is only suitable for those applications in which a high actuating force is also available.
  • the mass body is connected to the piston of a damping cylinder, the piston being provided with valves which are opened when moving in the deflection direction, but are closed when moving back, so that this return movement is damped accordingly.
  • the damping measure provided in this case is too complex and bulky for many applications.
  • a disadvantage of both embodiments of the known locking or damping elements is that they significantly reduce the maximum switching frequency, since the mass body only returns to its starting position with a time delay.
  • German patent specification 972 2366 which uses the physical principle of the elastic impact, but not there to avoid contact bouncing, but to achieve a quick switching behavior.
  • the object of the invention is to create a contact device in which contact bouncing is avoided by means that are inexpensive and take up little space while influencing the switching characteristic as little as possible.
  • the achievement of this object is specified in the characterizing part of claim 1.
  • the stop provided thereafter serves to absorb the kinetic energy of the mass body when it swings back into the rest position.
  • the distance between the mass body and the component which transmits the kinetic energy of the movable contact to it in the rest position of the contact device prevents the mass body from striking the mentioned component again when it swings back into its rest position and the kinetic energy from the contact system reacts. Because the mass body and it can be made relatively stiff against the spring biasing the mass body returns accordingly quickly to its rest position, so that it does not affect the switching frequency of the contact device.
  • the stop can be produced practically without any additional outlay in terms of production technology, and the distance mentioned does not need to be greater in practice than, for example, 0.1 mm, so that the entire arrangement is compact and inexpensive.
  • the contact device according to the invention is therefore particularly suitable for acceleration switches, such as those used in motor vehicles for controlling restraint devices.
  • leaf springs 10 ... 13 are attached to a housing element (not shown), the other, free end of the leaf spring 10 having a movable contact 14 and the leaf spring 11 having a mating contact 15, the Leaf spring 12 a shock body 16, and the leaf spring 13 carries a mass body 17.
  • the leaf spring 13 is preloaded in such a way that it bears in the area of its free end in the rest position against a stop 18, the mass body 17 being at a distance s from the impact body 16 in this rest position.
  • the leaf spring 11 is relatively short and stiff, so that the mating contact 15 can only be moved slightly and forms the "fixed contact" of the contact pair 14, 15.
  • the movable contact 14 is moved back by the force of the leaf spring 10 and thereby hits the mating contact 15, so that the contact pair closes again.
  • the kinetic energy of the movable contact 14 is transmitted via the counter-contact 15 and the shock body 16 to the mass body 17, which had previously been held in its rest position by the bias of the leaf spring 13.
  • the impact body 16 and the mass body 17 can be achieved that practically all the kinetic energy of the movable contact 14 is transferred to the mass body 17, which is thereby deflected counterclockwise according to Figure 1 and then in a rest position swinging back at stop 18.
  • the shock body 16 has been moved back by its leaf spring 12 in the direction of its rest position, so that it is no longer pushed by the mass body 17 and this ultimately releases its kinetic energy to the stop 18. Since the impact body 16 has released its kinetic energy, its return movement does not cause any significant impact on the contact pair, so that bruises are effectively avoided.
  • Figure 2 differs from that of Figure 1 essentially in that the movable contact 14 is attached to an intermediate point of a leaf spring 19 which carries the shock body 16 at its free end.
  • the impact and mass bodies 16, 17 have the same masses, while the contacts 14, 15 have substantially small masses.
  • the leaf spring 19 is deflected clockwise according to FIG. 2, while the mass body 17 is held in its rest position by the stop 18 fixed to the housing. After no time the acceleration moves the contact spring 19 in the opposite direction, the contact pair 14, 15 closes and the impact body 16 hits the mass body 17 by bending the upper part of the leaf spring 19 around the contact point and transmits its kinetic energy thereon.
  • the distance s present in the idle state between the mass body 17 and the shock body 16 must be smaller than the dimension d entered in FIG. 2, by which the shock body 16 can be displaced by bending the leaf spring 19 without the contact pair 14, 15 opens so that contact bouncing is avoided or at least limited to a very short period of time.
  • the various leaf springs in particular the leaf spring 10 or 19 carrying the movable contact 14, are dimensioned such that the contact pair is closed with a given pretension in the rest position and only opens when an acceleration occurs, which causes this pretension exceeds the corresponding threshold.
  • this threshold is approximately 4 to 5 times the acceleration due to gravity.
  • the position of the counter contact 15 can be adjusted, as a result of which the distance s can be changed.
  • the setting can be made, for example, by adjusting the spring 11. It is expedient to choose the distance s as small as possible as long as it is ensured that the mass body 17 no longer reaches the impact body 16 when it swings back.
  • the mass body 17, the impact body 16 and the leaf springs 13 and 12 carrying them can each be produced in one piece, for example also consist of plastic and be integrally formed on the housing element receiving the contact device. This enables a particularly uncomplicated production of the device which avoids contact bruises. In the exemplary embodiment according to FIG. 2, this does not apply to the leaf spring 19, since this also carries the contact 14 and must therefore be conductive.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Vibration Dampers (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Push-Button Switches (AREA)
EP87116670A 1986-11-11 1987-11-11 Elektrische Kontaktvorrichtung Expired - Lifetime EP0268937B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863638504 DE3638504A1 (de) 1986-11-11 1986-11-11 Elektrische kontaktvorrichtung
DE3638504 1986-11-11

Publications (2)

Publication Number Publication Date
EP0268937A1 EP0268937A1 (de) 1988-06-01
EP0268937B1 true EP0268937B1 (de) 1992-03-18

Family

ID=6313688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116670A Expired - Lifetime EP0268937B1 (de) 1986-11-11 1987-11-11 Elektrische Kontaktvorrichtung

Country Status (4)

Country Link
US (1) US4814564A (enrdf_load_stackoverflow)
EP (1) EP0268937B1 (enrdf_load_stackoverflow)
JP (1) JPS63133408A (enrdf_load_stackoverflow)
DE (2) DE3638504A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317501A1 (de) * 1987-11-18 1989-05-24 Alusuisse-Lonza Services Ag Filter zur Reinigung der Abgase von Dieselmotoren
US5051935A (en) * 1989-05-25 1991-09-24 Matty Richard D Drag race analyzer
FR2650436B1 (fr) * 1989-07-25 1995-12-22 Clo Electronique Relais electromecanique sans rebond
DE4140691A1 (de) * 1991-12-10 1993-06-17 Trw Repa Gmbh Fahrzeugsensitiver mechanischer kontaktgeber
JP3374655B2 (ja) * 1996-04-23 2003-02-10 トヨタ自動車株式会社 エンジンとトランスミッションとの組立体を車体に支持する方法および組立体の支持構造
JP3191724B2 (ja) * 1997-04-25 2001-07-23 株式会社デンソー チャタリング防止接点構造を用いた衝突検知装置
FR3082353B1 (fr) 2018-06-08 2022-11-04 Langlade & Picard Dispositif mobile de basculement (f) pour relais electromagnetique monostable basse-tension (entre 110v et 400v)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2071384A (en) * 1934-01-19 1937-02-23 Utah Radio Products Company Vibratory motor device
DE887970C (de) * 1944-09-30 1953-08-27 Siemens Ag Elektrisches Schaltgeraet mit Abhebekontakten
DE972236C (de) * 1949-10-31 1959-06-11 Siemens Ag Elektrischer Schnellschalter
BE553524A (enrdf_load_stackoverflow) * 1955-10-04
DE1025523B (de) * 1956-02-29 1958-03-06 Siemens Ag Polarisiertes Relais mit erhoehtem Kontaktdruck
DE1055712B (de) * 1957-12-23 1959-04-23 Siemens Ag Elektrische Kontaktvorrichtung mit einer Hilfsmasse zur Beseitigung von Kontaktprellungen
DE1175807B (de) * 1959-04-10 1964-08-13 Schaltbau Gmbh Elektrische Zwillingskontaktanordnung mit zeit-lich nacheinanderschaltenden Kontaktpaaren
AT337818B (de) * 1975-03-19 1977-07-25 Reiter Lothar Dipl Ing Dr Tech Prellfreie massenanordnung

Also Published As

Publication number Publication date
JPS63133408A (ja) 1988-06-06
US4814564A (en) 1989-03-21
DE3638504A1 (de) 1988-05-26
EP0268937A1 (de) 1988-06-01
DE3777550D1 (de) 1992-04-23
DE3638504C2 (enrdf_load_stackoverflow) 1989-03-02

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