US3800249A - Switch construction - Google Patents

Switch construction Download PDF

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Publication number
US3800249A
US3800249A US00339137A US33913773A US3800249A US 3800249 A US3800249 A US 3800249A US 00339137 A US00339137 A US 00339137A US 33913773 A US33913773 A US 33913773A US 3800249 A US3800249 A US 3800249A
Authority
US
United States
Prior art keywords
magnetic core
carrier member
closed magnetic
cavity
carrier
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
US00339137A
Other languages
English (en)
Inventor
G Bury
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority to US00339137A priority Critical patent/US3800249A/en
Priority to GB964074A priority patent/GB1426537A/en
Priority to NL7402952A priority patent/NL7402952A/xx
Priority to AU66333/74A priority patent/AU6633374A/en
Priority to DE2410562A priority patent/DE2410562A1/de
Priority to JP49025345A priority patent/JPS49120182A/ja
Priority to BR1669/74A priority patent/BR7401669D0/pt
Priority to FR7407843A priority patent/FR2220857B3/fr
Application granted granted Critical
Publication of US3800249A publication Critical patent/US3800249A/en
Priority to IT20690/74A priority patent/IT1009664B/it
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon

Definitions

  • the embodiment of the invention disclosed herein is directed to a switch construction which includes a base member which has a pair of slide surfaces. A cam surface formed as an integral part of one of the slide surfaces.
  • a frame member is positioned over the base member and provides a cavity therein to receive a car rier member which supports a movable permanent magnet.
  • the carrier member has a protrusion extending from one side thereof and forms a cam follower engagable with the cam surface.
  • the carrier member is made of resilient material and has a slot formed over the cam follower member to provide an integral resilient support portion for the cam follower.
  • the switch structure includes one or more closed magnetic core structures of the type having drive and sense lines passing therethrough and wherein transformer coupling of signals between the drive-and sense lines occurs only when the closed magnetic core structures are magnetically unsaturated.
  • This invention relates generally to a switch structure, and more particularly to a two position slide switch with means for indexing the slide carrier at one of two or more positions.
  • close loop magnetic core structures as switching devices has become well known in the art of solid state switches.
  • This type of switch structure comprises a close loop magnetic core structure, preferably toroidal in configuration, and has drive and sense lines passing therethrough. Signal information is delivered along the drive line and transformer coupled to the sense line when the closed magnetic core structure is in an unsaturated condition. Upon unsaturating of the core transformer coupling of the signals between the drive and sense lines occur. This transformer coupling then provides signals which can be delivered to a solid state switching device such as an RS flip-flop, or the like, to control certain logic functions. While solid state switch structures of this general type are illustrated herein, with the new and improved detent configuration, it will be understood that any solid state or mechanical switch structure can use the novel cam detent slide mechanism of this invention.
  • Another object of this invention is to provide a switch structure which is efficient and reliable in use while being relatively simple and inexpensive to manufacture.
  • a feature of this invention is the use of a cam surface formed in one slide surface of the switch interior which engages the cam follower formed on another slide surface within the interior of the switch.
  • the cam follower is positioned immediately adjacent a slot formed in the material, and the material itself has sufficient resiliency to maintain a spring bias condition of the cam follower while it is in contact with the cam surface.
  • FIG. 1 is an enlarged perspective view of a switch constructed in accordance with the principles of this invention
  • FIG. 2 is an exploded view showing the various components of the switch structure of FIG. 1;
  • FIG. 3 is a sectional view through the switch structure of FIG. 1 showing the relative cooperation of components therein;
  • FIG. 4 is a detailed plan view of the base member of the switch of FIG. 2;
  • FIG. 5 is a side view of the base member-of FIG. 4;
  • FIG. 6 is an end view of the base member of FIG. 4;
  • FIG. 7 is a side view of the carrier member constructed in accordance with this invention and shows the projection and slot which maintains a resilient cam follower member as an integral part therewith;
  • FIG. 8 is a bottom view of the carrier member of FIG.
  • FIG. 9 is a sectional end view taken along line 99 of FIG. 7;
  • FIG. 10 is a side elevational view of an alternate form of switch structure in accordance with this invention.
  • the switch structure 10 includes a slide actuating member 12 extending through an elongated opening 13 formed in the top ofa frame member 14. While the embodiment of the switch structure illustrated herein is directed to a slide switch it will be understood that other switch configurations may be used. For example, a toggle switch construction, FIG. 10, can be used to pivotally slide a carrier member from one position to another position in the same fashion as manual manipulation of the slide member 12.
  • the frame member 14 includes a pair of diametrically opposed extended tab portions 14a and 14b through which apertures 16 'are formed for mounting purposes.
  • a carrier member 18 Movably positioned within the cavity of the switch structure 10 is a carrier member 18 which supports a permanent magnet 19 along one side thereof.
  • the movable permanent magnet 19 is used to magnetically saturate and unsaturate one or more closed loop magnetic core structures during switching operations.
  • a base member 20 is located at the bottom of the frame 14 and provides a pair of slide surfaces 21 and 22 which engage corresponding mating slide surfaces formed on the carrier member 18.
  • An island portion 23 is formed between the slide surfaces 21 and 22 and is used to support and hold in position a pair of closed loop magnetic core structures 24 of toroidal configuration. It will be understood that the closed loop magnetic core structure can be rectangular, or oval in configuration rather than toroidal.
  • a drive wire 26 passes through both of the close loop magnetic core structures while independent sense wires 27 and 28 pass through respective different ones of the core structures.
  • a common drive signal therefore is used to transformer couple necessary signal information to the sense wire of the magnetically unsaturated core structure.
  • a pair of independent drive wires may be used and an independent or a common sense wire to form different switch functions.
  • the drive wire 26 and sense wires 27 and 28 depend from the base member 20 a sufficient distance to provide a plurality of terminal connector ends 25 which can be inserted through openings of a printed circuit board and electrically connected to a printed circuit formed thereon by any one of the multitude of different techniques.
  • a pair of grooves 29 and 30 are formed on opposite sides of the base 20 and next to the slide surfaces 21 and 22. These grooves receive corresponding bottom edge portions 31 and 32 of the frame member 14. The base member and frame member 14 are then secured together by gluing or heat sealing to form the' necessary cavity therein for the carrier 18.
  • a cam surface 34 is formed on at least one of the slide surfaces 21 and 22, it being here illustrated on g the slide surface 22.
  • a projection 36 extending downwardly from the carrier member 18 and forms a cam follower to ride over the cam surface and lock the carrier in one of the two positions as shown. It will be understood that there may be three or more undulations formed in the cam surface 34 and the carrier 18 have three or more distinct stopping positions.
  • a slot 38 is formed adjacent the projection 36 and thereby forms an integral resilient member of the projection with the carrier, 18.
  • the vertical extent of the cavity formed by the base 20 and the top wall 140 of the frame 14 is substantially equal to the vertical extent of the carrier 18 minus the distance of the projection 36. Therefore, the carrier 18 is confined substantially within the cavity for sliding movement therein.
  • the top wall 14c of the frame 14 applies sufficient downward force to the cam follower and the cam surface so that the slot 38 is somewhat compressed as a result of the resiliency of the material.
  • the switch structure disclosed herein needs no additional springs or roller bearing devices to provide stop detent means for a two position or other multiposition slide mechanism.
  • the material from which the carrier member is made may be of any suitable resilient moldable plastic such as nylon or the like.
  • the base member has ledge portions 70 upon which the toroidal magnetic cores 24 are positioned and held in place.
  • a plurality of apertures 71 are provided at spaced apart locations along the central axis of the island portion 23 of the base member through which inverted U-shaped bent wire portions are inserted to form the drive and sense lines for the solid state switch.
  • FIGS. 7,8, and 9. The details of the carrier member 18 are shown in FIGS. 7,8, and 9.
  • the magnet 19 is maintained in position in a cavity 18a.
  • the magnet may be secured by a press fit within the cavity 18a or it may be glued by suitable adhesives or the like.
  • the projection 36 has bevelled side wall portions 36a and 36b to provide minimum contact surface area with the cam surface 34.
  • FIG. there is seen an alternate form of a switch structure constructed in accordance with the principles of this invention and is designated generally by reference numeral 60.
  • the switch 60 has the same general cam surface and cam follower configuration as clearly disclosed in FIG. 2 and, wherein a slot is formed over the cam follower to provide an integral resilient cam follower member on the carrier.
  • a frame and base member are shown together to form a switch housing 61 from which extends connectors 62 which are part of the movable carrier member mounted within the switch housing.
  • a pivotal actuator 63 is mounted to a pair of upstanding support arms 64 and is pivotally secured thereto by means of a transverse pin 66.
  • the pivotal actuator 63 has a lower portion 63a which engages the connectors 62 to provide a sliding action substantially in the same manner as the slide actuator l2 of FIG. 1.
  • Extending downwardly from the switch housing 61 is a plurality of connector pins 67 to be inserted through correspondingly spaced apart apertures in a printed circuit board soldered into associated circuitry.
  • a switch construction comprising; a base member, a frame member positioned over and secured to said base member, said frame member and said base member cooperating to provide a cavity therebetween, a cam surface formed in said cavity, a carrier member of resilient material movably positioned in said cavity, said carrier member having an end wall portion, a projection formed on the end wall portion of said carrier member to form a cam follower extending toward and engageable with the cam surface formed in said cavity, and a slot formed in the end wall portion of said carrier member, said slot being positioned a distance from said protrusion to resiliently support the protrusion as an integral part of said carrier member, thereby resiliently urging said cam follower into engagement with said cam surface as said carrier member is moved from one position to another position in said cavity.
  • the switch construction according to claim 1 further including at least one slide surface formed in said cavity, said cam surface being formed in a central portion of the slide surface, and said protrusion forms a portion of a mating slide surface on said carrier member.
  • the switch construction according to claim 1 further including means for supporting a closed magnetic core within said cavity, a sense line passing through said closed magnetic core, and a drive line passing through said closed magnetic core, said closed magnetic loop member being magnetically saturated and unsaturated in response to the presence and removal of a magnetic field, and a permanent magnet secured to said carrier member for movement therewith, said permanent magnet being positioned adjacent said closed magnetic core structure in one position and removed from said closed magnetic core in another position to saturate and unsaturate the same.

Landscapes

  • Push-Button Switches (AREA)
  • Slide Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
US00339137A 1973-03-08 1973-03-08 Switch construction Expired - Lifetime US3800249A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00339137A US3800249A (en) 1973-03-08 1973-03-08 Switch construction
GB964074A GB1426537A (en) 1973-03-08 1974-03-04 Switch construction
NL7402952A NL7402952A (de) 1973-03-08 1974-03-05
DE2410562A DE2410562A1 (de) 1973-03-08 1974-03-06 Schalterkonstruktion
AU66333/74A AU6633374A (en) 1973-03-08 1974-03-06 Switch construction
JP49025345A JPS49120182A (de) 1973-03-08 1974-03-06
BR1669/74A BR7401669D0 (pt) 1973-03-08 1974-03-07 Construcao de interruptor
FR7407843A FR2220857B3 (de) 1973-03-08 1974-03-07
IT20690/74A IT1009664B (it) 1973-03-08 1974-04-08 Interruttore a cursore a nuclei magnetici

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00339137A US3800249A (en) 1973-03-08 1973-03-08 Switch construction

Publications (1)

Publication Number Publication Date
US3800249A true US3800249A (en) 1974-03-26

Family

ID=23327668

Family Applications (1)

Application Number Title Priority Date Filing Date
US00339137A Expired - Lifetime US3800249A (en) 1973-03-08 1973-03-08 Switch construction

Country Status (9)

Country Link
US (1) US3800249A (de)
JP (1) JPS49120182A (de)
AU (1) AU6633374A (de)
BR (1) BR7401669D0 (de)
DE (1) DE2410562A1 (de)
FR (1) FR2220857B3 (de)
GB (1) GB1426537A (de)
IT (1) IT1009664B (de)
NL (1) NL7402952A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5646587A (en) * 1994-11-10 1997-07-08 Yazaki Corporation Magnetic element switch
US20040118666A1 (en) * 2002-08-09 2004-06-24 Mccaig Chris E. Fail-safe automotive switch
US20060042925A1 (en) * 2004-08-27 2006-03-02 Gjerde Richard D Stackable switch
US20060054480A1 (en) * 2004-09-10 2006-03-16 Gorrie Joseph E Multifunction switch for operating a device in a sealed container
ITMI20082028A1 (it) * 2008-11-14 2010-05-15 Franco Frazza Generatore elettrico a pulsante
US20110206363A1 (en) * 2010-02-22 2011-08-25 Lg Innotek Co., Ltd. Camera shutter device and optical apparatus having the same
US20110206364A1 (en) * 2010-02-22 2011-08-25 Lg Innotek Co., Ltd. Camera shutter device and optical apparatus having the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361999A (en) * 1964-02-13 1968-01-02 Bosch Gmbh Robert Magnetic switch operating unit
US3601727A (en) * 1970-03-09 1971-08-24 Cutler Hammer Inc Magnetic snap action switch
US3622922A (en) * 1969-09-24 1971-11-23 Denki Onkyo Co Ltd Electric pushbutton switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361999A (en) * 1964-02-13 1968-01-02 Bosch Gmbh Robert Magnetic switch operating unit
US3622922A (en) * 1969-09-24 1971-11-23 Denki Onkyo Co Ltd Electric pushbutton switch
US3601727A (en) * 1970-03-09 1971-08-24 Cutler Hammer Inc Magnetic snap action switch

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5646587A (en) * 1994-11-10 1997-07-08 Yazaki Corporation Magnetic element switch
US20040118666A1 (en) * 2002-08-09 2004-06-24 Mccaig Chris E. Fail-safe automotive switch
US20060042925A1 (en) * 2004-08-27 2006-03-02 Gjerde Richard D Stackable switch
US7148440B2 (en) * 2004-08-27 2006-12-12 Illinois Tool Works, Inc Stackable switch
US20060054480A1 (en) * 2004-09-10 2006-03-16 Gorrie Joseph E Multifunction switch for operating a device in a sealed container
US7199316B2 (en) * 2004-09-10 2007-04-03 W.T. Storey, Inc. Multifunction switch for operating a device in a sealed container
ITMI20082028A1 (it) * 2008-11-14 2010-05-15 Franco Frazza Generatore elettrico a pulsante
US20110206363A1 (en) * 2010-02-22 2011-08-25 Lg Innotek Co., Ltd. Camera shutter device and optical apparatus having the same
US20110206364A1 (en) * 2010-02-22 2011-08-25 Lg Innotek Co., Ltd. Camera shutter device and optical apparatus having the same
US8360665B2 (en) * 2010-02-22 2013-01-29 Lg Innotek Co., Ltd. Camera shutter device and optical apparatus having the same

Also Published As

Publication number Publication date
FR2220857B3 (de) 1976-12-17
NL7402952A (de) 1974-09-10
FR2220857A1 (de) 1974-10-04
BR7401669D0 (pt) 1974-11-05
AU6633374A (en) 1975-09-11
IT1009664B (it) 1976-12-20
DE2410562A1 (de) 1974-09-12
GB1426537A (en) 1976-03-03
JPS49120182A (de) 1974-11-16

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