US3433914A - Pushbutton switch - Google Patents

Pushbutton switch Download PDF

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Publication number
US3433914A
US3433914A US678108A US67810867A US3433914A US 3433914 A US3433914 A US 3433914A US 678108 A US678108 A US 678108A US 67810867 A US67810867 A US 67810867A US 3433914 A US3433914 A US 3433914A
Authority
US
United States
Prior art keywords
spring
contact
board
pushbutton
coil
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
US678108A
Other languages
English (en)
Inventor
Eric R Ericsson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of US3433914A publication Critical patent/US3433914A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
    • 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
    • H01H1/245—Spring wire contacts
    • 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
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/20—Driving mechanisms
    • H01H13/22—Driving mechanisms acting with snap action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/7076—Coupling devices for connection between PCB and component, e.g. display

Definitions

  • the present invention relates to a switching device, especially suitable for application to printed circuit boards.
  • Such switching devices comprising push button operating means are used for instance in pushbutton sets for pulsing in telephone instruments.
  • These pushbutton sets which must be mounted in the space provided for the conventional dial, must not be bulky, whereby the design of the device presents a problem, especially as the space available for the required contact springs is limited.
  • a known design uses reed contacts that are located substantially in parallel relationship to thecircuit board and conveniently secured to the same. When actuated, the movable springs make or break the contact with fixed contacts provided on the board. In this arrangement, however, it becomes necessary to use short contact springs, which has inherent disadvantages, such as a bad contact sliding at the closure moment of contact engagement, which may jeopardize an effective operation, as well as cause a relatively high deflection stress on a short spring length.
  • reed springs of U-form are mounted on a support projecting from the board, so that the arms of the U-formed springs are placed perpendicularly to the board.
  • the ends of the spring arms are inserted into holes in the board to cooperate with fixed contacts arranged on the edges of the holes. Ihe spring movement is obtained by displacement of the push button in a direction tangential to the spring.
  • This device has the disadvantage that the deflection of the contact spring might cause fracture t of the spring.
  • the device of the invention is similar to this lastmentioned construction in that the springs are located on supports projecting vfrom the board and have contact arms that are substantially perpendicular to the board. It constitutes, however, an improvement of the known device in that the detlection length of the spring is considerably greater although the spring still occupies a reduced space. The spring furthermore is not subjected to bends that are likely to cause a fracture.
  • FIGURE 1 shows an exploded view of the pushbutton mechanism and FIGURE 2 shows the position of the contact spring in three different phases of the pushbutton movement.
  • the pushbutton mechanism is supported by a base plate 1 of insulating material that may be common to a plurality of pushbuttons.
  • the base plate has secured thereon an elastic support 2 for each pushbutton mechanism.
  • a pushbutton 3 has a center shaft 4 that tits into a hole 5 in the base plate 1, which hole serves as a guide for the shaft.
  • a cover plate 6 with a square hole 7 is provided, through which hole the upper square portion of the pushbutton may protrude.
  • the shaft 4 is inserted into the hole 5, whereafter the cover plate 6 is placed over the upper part of the pushbutton and in a convenient manner secured to the base plate 1 at a predetermined distance from the same.
  • the button is provided with a helical spring 10, located on an upper part 8 of the center shaft, which spring normally pushes the button 3 upwards, so that its flange 9 rests against the bottom side of the cover plate 6.
  • the switching device further comprises two movable contact ⁇ springs 13 and 14, one being a mirror image of the other.
  • the contact springs are made of resilient wire and designed to be mounted on the support 2. For this purpose they are provided 'with a coil spiral 19 at their upper part, which coil spiral fits into a recess 21 in the support 2, where it is retained without being squeezed.
  • the recess 21 has an upper opening that is somewhat narrower than the outer diameter of the coil spiral. The coil spiral may, however, be pushed down through this opening because the support 2 is made of an elastic material.
  • each spring has at the end of one 'arm a cylindrical contact 17 for cooperation with a fixed contact '12. At an intermediate portion of this arm is provided with a coil spiral 20 which partly serves to absorb the deection stresses during the actuation of the spring and partly serves as an actuation surface for the pushbutton, thereby providing a convenient trigger point as is explained below.
  • the other arm of the spring is straight and, when mounting the spring in the support 2, this arm is inserted into a hole 25 through the base plate 1 and the printed circuit board 11, so that this arm may be soldered to a printed circuit on the bottom side of the circuit board as shown at 15 and 16 (FIG. 2).
  • the cylindrical contact 17 provided on the end of the other arm is inserted into another hole 26.
  • the fixed contact 12 made in form of a wire, is located in a groove 27 in the bottom side of the base plate and has a V-formed portion 18 for cooperation with the contact 17.
  • the wire 12 may at a convenient place cross the circuit board and be connected to a conductor on this board.
  • the pushbutton is provided with an actuation member 23 for actuating the springs.
  • the actuation member is at its lower end provided with two symmetrical curved recesses 24 for actuating the coil spirals 20 of the springs 13 and 14.
  • the vertical diameter of the coil spirals are practically in the same plane as the vertical side of the respective actuation member, a fact that produces the desired trigger point effect (see FIG. 2).
  • a person pressing the pushbutton has, in order to overcome the reaction of the spring, to increase the force so that the springs are displaced laterally thereby making contact with the fixed contacts.
  • a switching device for switching conductors of a printed circuit board comprising in combination:
  • an actuating member supported by said board on the side thereof mounting the support and displaceable normal to the plane of the board, said member having on one end a portion engaging said spiral coil upon depressing the actuating member from an inactive position into a predetermined depressed position with reference to the plane of the board, engagement of said portion with said spiral coil displacing the latter substantially parallel to the plane of the board thereby exing said other spring arm into the other one of its switching positions and retaining said other arm in said other switching position.
  • a pushbutton is secured to the other end of the actuating member and a mounting post extends from the pushbutton into a hole of the board slidable therein, and wherein a spring is interposed between the board and the pushbutton biasing the later into a position in which the actuating member is in said inactive position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Push-Button Switches (AREA)
  • Slide Switches (AREA)
US678108A 1967-02-24 1967-10-25 Pushbutton switch Expired - Lifetime US3433914A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE263367 1967-02-24

Publications (1)

Publication Number Publication Date
US3433914A true US3433914A (en) 1969-03-18

Family

ID=20260343

Family Applications (1)

Application Number Title Priority Date Filing Date
US678108A Expired - Lifetime US3433914A (en) 1967-02-24 1967-10-25 Pushbutton switch

Country Status (11)

Country Link
US (1) US3433914A (fr)
BE (1) BE708752A (fr)
BR (1) BR6794627D0 (fr)
CH (1) CH470063A (fr)
DE (1) DE1277981B (fr)
DK (1) DK114211B (fr)
ES (1) ES347235A1 (fr)
FI (1) FI44920C (fr)
GB (1) GB1155505A (fr)
NL (1) NL6800655A (fr)
NO (1) NO120587B (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801766A (en) * 1973-01-22 1974-04-02 Valleylab Inc Switching means for an electro-surgical device including particular contact means and particular printed-circuit mounting means
US3860776A (en) * 1973-07-19 1975-01-14 Amp Inc Momentary switch with wire spring components
US3920943A (en) * 1974-03-22 1975-11-18 Magsat Corp Electrical switch
US3946185A (en) * 1974-08-21 1976-03-23 Intersil, Inc. Spring wire contact assembly
US3949181A (en) * 1974-09-03 1976-04-06 Kempf Dean R Low profile-low bounce electrical switch apparatus
US4092503A (en) * 1975-12-22 1978-05-30 Johan Nils Eskil Raeder Push button switch or keyboard assembly having flexible wire contacts
US4112284A (en) * 1975-08-22 1978-09-05 The General Electric Company Limited Fall-through return spring arrangement for a push-button switch mechanism
US4144430A (en) * 1978-03-10 1979-03-13 Amp Incorporated Cantilever spring contact having integral support pin
US4150272A (en) * 1976-12-21 1979-04-17 Telefonaktiebolaget L M Ericsson Push button contact mechanism for use at printed circuit cards
US4488018A (en) * 1982-12-06 1984-12-11 Hosiden Electronics Co., Ltd. Miniature switch
US5743382A (en) * 1996-09-03 1998-04-28 Shin Jiuh Corp. Switch having a displaying function
US5804786A (en) * 1996-09-25 1998-09-08 Braaten; Ronald J. Switch operating mechanism
US6307181B1 (en) * 1997-04-07 2001-10-23 Kenji Hashimoto Body hair treating implement
EP3166124A1 (fr) * 2015-11-06 2017-05-10 Omron Corporation Interrupteur
CN106971872A (zh) * 2015-11-06 2017-07-21 欧姆龙株式会社 开关

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK137586B (da) * 1976-06-30 1978-03-28 Gnt Automatic As Trykknapmekanisme.
DE2705914C2 (de) * 1977-02-09 1982-06-16 Siemens AG, 1000 Berlin und 8000 München Umsteuerventil
DE2948432C2 (de) * 1979-12-01 1982-09-02 Standard Elektrik Lorenz Ag, 7000 Stuttgart Drucktastenschalter mit Schnappwirkung
EP0261702A1 (fr) * 1986-08-27 1988-03-30 Koninklijke Philips Electronics N.V. Interrupteur avec contacts en forme de fil
FR2615045B1 (fr) * 1987-05-06 1992-09-11 Hager Electro Dispositif de connexion rapide de circuits imprimes pour boitiers modulaires
DE4016292A1 (de) * 1990-05-21 1991-11-28 Mannesmann Kienzle Gmbh Kontakteinrichtung fuer einen schalter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755346A (en) * 1950-09-19 1956-07-17 Charles P Fisher Sensitive relay
US2847529A (en) * 1956-12-31 1958-08-12 Ibm Electrical contact assembly

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3244847A (en) * 1964-05-22 1966-04-05 Navigation Computer Corp Manually operated keyboard switch in a stationary mount with guided shaftway

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755346A (en) * 1950-09-19 1956-07-17 Charles P Fisher Sensitive relay
US2847529A (en) * 1956-12-31 1958-08-12 Ibm Electrical contact assembly

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801766A (en) * 1973-01-22 1974-04-02 Valleylab Inc Switching means for an electro-surgical device including particular contact means and particular printed-circuit mounting means
US3860776A (en) * 1973-07-19 1975-01-14 Amp Inc Momentary switch with wire spring components
US3920943A (en) * 1974-03-22 1975-11-18 Magsat Corp Electrical switch
US3946185A (en) * 1974-08-21 1976-03-23 Intersil, Inc. Spring wire contact assembly
US3949181A (en) * 1974-09-03 1976-04-06 Kempf Dean R Low profile-low bounce electrical switch apparatus
US4112284A (en) * 1975-08-22 1978-09-05 The General Electric Company Limited Fall-through return spring arrangement for a push-button switch mechanism
US4092503A (en) * 1975-12-22 1978-05-30 Johan Nils Eskil Raeder Push button switch or keyboard assembly having flexible wire contacts
US4150272A (en) * 1976-12-21 1979-04-17 Telefonaktiebolaget L M Ericsson Push button contact mechanism for use at printed circuit cards
US4144430A (en) * 1978-03-10 1979-03-13 Amp Incorporated Cantilever spring contact having integral support pin
US4488018A (en) * 1982-12-06 1984-12-11 Hosiden Electronics Co., Ltd. Miniature switch
US5743382A (en) * 1996-09-03 1998-04-28 Shin Jiuh Corp. Switch having a displaying function
US5804786A (en) * 1996-09-25 1998-09-08 Braaten; Ronald J. Switch operating mechanism
US6307181B1 (en) * 1997-04-07 2001-10-23 Kenji Hashimoto Body hair treating implement
EP3166124A1 (fr) * 2015-11-06 2017-05-10 Omron Corporation Interrupteur
CN106971873A (zh) * 2015-11-06 2017-07-21 欧姆龙株式会社 开关
CN106971872A (zh) * 2015-11-06 2017-07-21 欧姆龙株式会社 开关
US9947487B2 (en) 2015-11-06 2018-04-17 Omron Corporation Switch

Also Published As

Publication number Publication date
BE708752A (fr) 1968-05-02
GB1155505A (en) 1969-06-18
ES347235A1 (es) 1969-01-16
DK114211B (da) 1969-06-09
BR6794627D0 (pt) 1973-09-18
NO120587B (fr) 1970-11-09
NL6800655A (fr) 1968-08-26
CH470063A (de) 1969-03-15
FI44920B (fr) 1971-11-01
FI44920C (fi) 1972-02-10
DE1277981B (de) 1968-09-19

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