US3859612A - Switching device - Google Patents

Switching device Download PDF

Info

Publication number
US3859612A
US3859612A US456437A US45643774A US3859612A US 3859612 A US3859612 A US 3859612A US 456437 A US456437 A US 456437A US 45643774 A US45643774 A US 45643774A US 3859612 A US3859612 A US 3859612A
Authority
US
United States
Prior art keywords
contact
permanent magnet
switching device
magnetic
contacts
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
US456437A
Other languages
English (en)
Inventor
Toshio Kashio
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.)
Casio Computer Co Ltd
Original Assignee
Casio Computer Co Ltd
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 Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Application granted granted Critical
Publication of US3859612A publication Critical patent/US3859612A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding

Definitions

  • a switching device includes a plurality of fixed contacts supported on a print board having an annular guide opening and arranged along the annular opening; a plurality of movable contacts formed integral with a magnetic plate and arranged to oppositely face the plurality of fixed contacts, respectively, with a clearance left therebetween; and an operating handle disposed, through the print board, on a side opposite to the side on which the magnetic plate is arranged.
  • the handle is provided with a permanent magnet.
  • This invention relates to an improved switching device capable of effecting the on-off operation of contacts under the influence of magnetic attraction.
  • a conventional switching device is provided with fixed contacts and movable contacts supported on corresponding elastic members.
  • the operation of a switch actuator causes the elastic member supporting the movable contact to be driven to permit the movable contact to be brought into contact with the fixed contact under resilient force of the elastic member.
  • the elastic member is liable to be vibrated.
  • chattering is liable to occur between the fixed contact and the movable contact.
  • any electrical signals for various instructions are obtained upon movement of the movable contact toward and away from the fixed contact, noise signals are liable to be introduced at the rise of the electrical signal.
  • the signal is not suitable for the instruction purpose and there arises a case where it is impossible to effect control on a one operation-one instruction basis.
  • the chattering causes spark discharges upon movement of the movable contact toward and away from the fixed contact with the resultant damage to the surfaces of the contacts.
  • the movable contact With a rotaryor slide-type switching device the movable contact is vibratingly moved toward and away from the fixed contact and mechanical vibrations are liable to occur particularly when the movable contact is brought into sliding engagement with the fixed contact. Consequently, chattering is very liable to occur. Since the speed at which the movable contact is moved toward and away from the fixed contact corresponds to the operating speed of an actuator for effecting a rotary or sliding movement, the surfaces of the contacts are damaged to a considerable extent and greater noise signals are liable to be introduced into electrical signals derived upon movement of the movable contact toward and away from thefixed contact.
  • a plurality of fixed contacts are easily provided, by printing etc., on a print board and a plurality of movable contacts are easily provided by etching a magnetic plate in places to form cuts integral with the magnetic plate.
  • the switching device so constructed can be applied to a slide-type switching device as well as a rotary-type switching device.
  • FIG. 1 is an exploded view of a switching device according to one embodiment of this invention.
  • FIG. 2 is a sectional view showing the switching device of FIG. 1;
  • FIG. 3 is an exploded view showing another embodiment of this invention.
  • FIGS. 1 and 2 there is shown a rotary switching device.
  • An operating shaft 11 extends through a hole 13 ofa supporting case 12 and an actuator 14 is capped on the top end of the operating shaft.
  • the operating shaft 11 is rotated by the operation of the actuator 14.
  • On the side surface of the operating shaft is integrally provided a downturned arm 15 which is located below the support case 12.
  • a permanent magnet 16 is integrally mounted to the forward end of the downturned arm.
  • the lower end portion of the operating shaft extends through a hole 18 of a print board 17.
  • an annular guide opening 19 is provided along a locus described when the permanent magnet 16 is rotated as a result of the rotation of the operating shaft.
  • a magnetic plate 22 is disposed through a spacer. In the spacer 21 are provided a hole 23 through which the operating shaft 11 extends and a plurality of apertures 24a, 24b, corresponding to the plurality of fixed contacts 20a, 20b respectively.
  • a hole 25 through which the operating shaft 11 extends and a plurality of spiral cuts 26a, 26b oppositely facing, through the respective apertures of the spacer, the plurality of fixed contacts 20a, 20b respectively.
  • the spiral cuts constitute a movable contact.
  • the movable contact is shown as being spiral in shape, it may take any form, provided that it can be attracted under the magnetic attraction of the permanent magnet 16.
  • the movable contact may be rectangular, lip-like, etc., in shape. These cuts may be easily formed by etching.
  • Under the magnetic plate 22 a protective plate 27 is disposed under the magnetic plate 22 .
  • the rotary switching device is so fabricated integral with the supporting case.
  • the operating shaft 11 When the actuator 14 is operated, the operating shaft 11 is rotated to permit the permanent magnet 16 to be set at a position corresponding to any one of the fixed contacts 20a, 20b
  • the permanent magnet 16 When the permanent magnet 16 is set at a position, for example, corresponding to the fixed contact 20a, the movable contact 26a constituted of the magnetic material is attracted, under the attractive force of the permanent magnet, toward the permanent magnet and thus the fixed contact 20 as shown in FIG. 2 so that the movable contact 26a is kept into electric contact with the fixed contact 20a.
  • any contact circuit is selectively created by rotating the actuator 14 and thus the operating shaft 11.
  • the movable contacts 26a, 26b are driven under the magnetic attraction of the permanent magnet and any one of the movable contacts is, when magnetically attracted toward any one of the fixed contacts 20a, 20b kept in contact with the latter under a strong attractive force of the permanent magnet. Since no mechanically driven elastic support member for supporting the movable contact is used in this case, any mechanical vibration as occurring between the movable and fixed contacts can be prevented. As a result, any chattering can be prevented. This permits transmission of elastic signals, generation ofinstruction signals, and so on to be effectively controlled without introduction of any noise signals. Furthermore, since in a contact throw-in state a distance between the permanent magnet and the movable contact is sufficiently reduced, the movable contact is kept, under a sufficiently strong magnetic force, into electric contact with the fixed contact.
  • a magnetic plate 22 is formed by a pair of complementary plate halves 22a and 22b with an insulation space left therebetween, To the plate halves 22a and 22b, input terminals 300 and 30b are respectively connected. A pair of downturned arms a and 15b are mounted on the opposite side surfaces of an operating shaft 11.
  • the movable contact is formed by suitably cutting in places the magnetic plate by a suitable means, magnetic pieces can be attached to the places in which the movable contacts are positioned. In this case, larger magnetic pieces may be used so that magnetic attraction can be effectively acted on the magnetic piece.
  • the contact is subjected, as required, to a plating treatment etc. Any specific contact material may be attached to the place in.which the fixed contact is positioned.
  • the fixed contact is not restricted to such a type as printed on a print board and it may be separately and independently formed using any suitable contact means.
  • a switching device comprising an operating handle having a permanent magnet driven to describe a predetermined locus; a plurality of fixed contacts supported on a plate and in proximity to the locus of the permanent magnet with an insulating space left therebetween; and a plurality of movable contacts formed integral with a magnetic plate and disposed, through the firstmentioned plate, on a side opposite to the side on which the operating handle is disposed, said plurality of movable contacts correspondingly facing said plurality of fixed contacts, respectively, so that when any one of the fixed contacts is selected by operating the handle, the corresponding movable contact is attracted, under the magnetic attraction of the permanent magnet, into contact with the fixed contact.
  • said magnetic plate comprises an electroconductive plate on which magnetic pieces are attached as movable contacts.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
US456437A 1973-04-03 1974-03-29 Switching device Expired - Lifetime US3859612A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48037985A JPS5218390B2 (es) 1973-04-03 1973-04-03

Publications (1)

Publication Number Publication Date
US3859612A true US3859612A (en) 1975-01-07

Family

ID=12512851

Family Applications (1)

Application Number Title Priority Date Filing Date
US456437A Expired - Lifetime US3859612A (en) 1973-04-03 1974-03-29 Switching device

Country Status (3)

Country Link
US (1) US3859612A (es)
JP (1) JPS5218390B2 (es)
DE (1) DE2416207B2 (es)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950719A (en) * 1974-08-21 1976-04-13 Maxwell Palmer M Proximity actuated magnetic button-contactor assembly for switches
US3996541A (en) * 1974-06-14 1976-12-07 Nippon Electric Company, Ltd. Electromagnetic switch
US4150350A (en) * 1976-12-16 1979-04-17 Fong Lee W Magnetic switch
US4199741A (en) * 1976-11-05 1980-04-22 Edouard Serrus Paulet Moving magnet, rotary switch
US4357585A (en) * 1979-12-10 1982-11-02 W. H. Brady Co. Laminated magnetic switch
US4544903A (en) * 1983-11-17 1985-10-01 Pittway Corporation Electrical connector system
US5523730A (en) * 1995-06-02 1996-06-04 Van Zeeland; Anthony J. Switch with mangnetically-coupled armature
US5867082A (en) * 1995-06-02 1999-02-02 Duraswitch, Inc. Switch with magnetically-coupled armature
US5990772A (en) * 1995-06-02 1999-11-23 Duraswitch Industries, Inc. Pushbutton switch with magnetically coupled armature

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6332435A (ja) * 1986-07-23 1988-02-12 大島　明 釣竿の釣糸投てき装置
DE102007025279A1 (de) * 2007-05-31 2008-12-04 Valeo Klimasysteme Gmbh Elektrischer Schalter mit Magnetbetätigung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383487A (en) * 1966-07-18 1968-05-14 Wiener Robert Thin flexible magnetic switch
US3486143A (en) * 1968-03-25 1969-12-23 Rolamite Technology Inc Magnetic switches

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383487A (en) * 1966-07-18 1968-05-14 Wiener Robert Thin flexible magnetic switch
US3486143A (en) * 1968-03-25 1969-12-23 Rolamite Technology Inc Magnetic switches

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996541A (en) * 1974-06-14 1976-12-07 Nippon Electric Company, Ltd. Electromagnetic switch
US3950719A (en) * 1974-08-21 1976-04-13 Maxwell Palmer M Proximity actuated magnetic button-contactor assembly for switches
US4199741A (en) * 1976-11-05 1980-04-22 Edouard Serrus Paulet Moving magnet, rotary switch
US4150350A (en) * 1976-12-16 1979-04-17 Fong Lee W Magnetic switch
US4357585A (en) * 1979-12-10 1982-11-02 W. H. Brady Co. Laminated magnetic switch
US4544903A (en) * 1983-11-17 1985-10-01 Pittway Corporation Electrical connector system
US5523730A (en) * 1995-06-02 1996-06-04 Van Zeeland; Anthony J. Switch with mangnetically-coupled armature
US5867082A (en) * 1995-06-02 1999-02-02 Duraswitch, Inc. Switch with magnetically-coupled armature
US5990772A (en) * 1995-06-02 1999-11-23 Duraswitch Industries, Inc. Pushbutton switch with magnetically coupled armature
WO2000019471A1 (en) * 1998-09-25 2000-04-06 Duraswitch Industries, Inc. Pushbutton switch with magnetically coupled armature

Also Published As

Publication number Publication date
JPS5218390B2 (es) 1977-05-21
DE2416207B2 (de) 1977-05-18
DE2416207A1 (de) 1974-10-17
JPS504589A (es) 1975-01-17

Similar Documents

Publication Publication Date Title
US3859612A (en) Switching device
KR100349220B1 (ko) 전기기계적접속장치
US4868530A (en) Electronic switch
KR100237554B1 (ko) 푸쉬버튼을 지닌 회전조작 전자부품
US6218635B1 (en) Push and rotary operating type electronic device
US2853576A (en) Electric switch
CA1105971A (en) Dome switch actuating apparatus
NO173208C (no) Stroembegrensende koblingsapparat
US3167620A (en) Rotary selector switch with rotary contact carrier and means to convert between diferent numbers of circuit controlling positions thereof
US3060291A (en) Switching assembly
US3713056A (en) Electromagnetic switch assembly
GB809090A (en) Improvements in or relating to magnetic positioning devices for electric switches and keys
US4216458A (en) Solid state switch
US3170999A (en) Silent magnetically operated snapaction electric switch
SU657773A3 (ru) Коммутационный аппарат
US2406818A (en) Rotary switch
US4272746A (en) Four pole double throw relay
US4001744A (en) Electrical switch
US3277413A (en) Rotary reed switch assembly
US3312797A (en) Mechanical interlock for electrical switches
FR2569901B1 (fr) Perfectionnements apportes aux interrupteurs a coupure automatique, notamment aux interrupteurs differentiels et disjoncteurs
GB2223831A (en) Joystick controller with reed switches
US3750077A (en) Contactless switching apparatus
KR20100038289A (ko) 자기 작동식 전기 스위치
KR100344523B1 (ko) 알에프 스위치