EP0070629A2 - Kontaktanordnung für Schalter - Google Patents

Kontaktanordnung für Schalter Download PDF

Info

Publication number
EP0070629A2
EP0070629A2 EP19820303271 EP82303271A EP0070629A2 EP 0070629 A2 EP0070629 A2 EP 0070629A2 EP 19820303271 EP19820303271 EP 19820303271 EP 82303271 A EP82303271 A EP 82303271A EP 0070629 A2 EP0070629 A2 EP 0070629A2
Authority
EP
European Patent Office
Prior art keywords
contact
aperture
contacts
carriers
board
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.)
Withdrawn
Application number
EP19820303271
Other languages
English (en)
French (fr)
Inventor
Kenneth Gatland
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.)
Thorn EMI Instruments Ltd
Original Assignee
Thorn EMI Instruments 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 Thorn EMI Instruments Ltd filed Critical Thorn EMI Instruments Ltd
Publication of EP0070629A2 publication Critical patent/EP0070629A2/de
Withdrawn legal-status Critical Current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
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/40—Contact mounted so that its contact-making surface is flush with adjoining insulation
    • H01H1/403—Contacts forming part of a printed circuit
    • 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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/365—Bridging contacts

Definitions

  • Such a switch may have many different applications for circuits employing such circuit boards and may then be operated by a switch activator mechanism which can be mounted directly on the printed circuit board or on a mounting assembly or housing associated therewith.
  • an electrical switch including: a circuit board having an aperture formed therein and a plurality of contacts adjacent the aperture and connected to-circuits on the board; at least one pair .of- complementary contact carriers disposed on opposite sides, of the board; and at least one contact member mounted in one of said carriers and having contact surfaces adapted to contact and connect two or more of said contacts on the circuit board; wherein the complementary contact carriers of said pair are interengaged through said aperture to provide opposing and substantially balanced forces on the board and are jointly movable relative to the board to connect or disconnect two or more contacts.
  • the switch further includes two plastic contaet carriers 5 and 6 disposed on opposite sides ' of the board 1.
  • Each contact carrier carries two conducting contacts 7 having raised contact surfaces in the form of pads 8, which in operation press against the contact 4 by virtue of suitable resilient means.
  • each contact 7 bridges two contacts 4 against which its pads 8 press at any time.
  • Each contact carrier also has a portion 9 which is complementary to slot 2 to slide within as can be better seen from Figure 2.
  • That Figure shows a similar sliding switch on board 1 in which the lower carrier 5 has been fitted to the slot 2.
  • Raised on part 9 is a male part in the form of a member 10 which fits a complementary female part formed as an aperture 11 on the other contact carrier.
  • the carriers When fully assembled the carriers are on opposite sides of the board 1, both having their parts 9 within slot 2 and their members 10 and apertures 11 inter-engaged to hold the contact pads 8 against contacts 4 and to be slidably movable in slot 2 as indicated by arrows 12.
  • To ensure a positive fitting and firm retention members 10 are formed with projections 13 and apertures 11 have slots 14 cut therein to be resilient.
  • Contact carriers 5 and 6 further include a projecting member 15 whose purpose is to engage an activator mechanism, such as that disclosed in the said Patent Application No.8121934, by which the carriers are moved in slot 2.
  • the contact carriers may of course be moved without the intermediary of an activator mechanism but that is not preferred.
  • a contact carrier 5 is shown in cross-section in Figure 3 to show the fitting of the contacts 7.
  • suitable contacts are shown in plan, sectional side elevation and end elevation in Figures 4a, 4b and 4c respectively and in another form in Figures 5a, 5b and 5c respectively.
  • the contacts 7, which are formed of copper with a precious metal contact face, have the two contact pads referred to hereinbefore and two sidewalls 16 and on the bends between the top surface and each sidewall 16 have an opening or cut-out 17 between the two pads 8.
  • the contact carriers 5 and 6 are formed with apertures 18 in which the contacts 7 may be inserted. They are also formed with projections 19 facing inwardly of the apertures 18 to engage cut-outs 17 on the contact 7 and thereby retain the contacts.
  • the contacts are placed in apertures 18 with contact pads 8 facing outwards and a resilient metal member 20 is placed within aperture l8 to urge contacts 7 outwardly. This serves partly to retain the contact, pressing the sidewall edges of cut-outs 17 against projections 19 and also serves to provide the resilience referred to hereinbefore to maintain pads 8 in firm contact with contact 4 on the circuit board.
  • the first step in assembly is to insert the resilient member 20 into the aperture 18, as is shown to the right hand side in Figure 5. Subsequently the contact 7 is inserted in the direction shown by the arrow 21 on the left hand side in Figure 5. It is pressed against the resilience of member 20 under the projections 19 and when in place allowed to rise with the projections 19 engaged in cut-out 17. Member 20 is shaped to facilitate this insertion but clearly need not be exactly as illustrated.
  • member 20 and contact 7 comprises two simple actions and yet provides positive positioning and resilience of contact. Furthermore the subsequent positioning of carriers 5 and 6 on opposite sides of board 1, as shown in Figure 1 with parts 9 in slot 2 and members 10 and apertures 11 inter-engaged is also a simple and yet positive procedure.
  • any of the aperatures 18 may include a dummy contact, perhaps of insulating material.
  • the active contacts may be on one side of the circuit board with all contacts on the other side being dummy ones.
  • the two contact carriers are identical, it is not necessary that they should be so provided they are complementary to the extent of being interlocking and providing opposing contacts when interlocked. Other interlocking arrangements than those illustrated may be used.
  • the contact carriers are moulded of 10% glass filled polycarbonate although many other materials may be used.
  • the embodiment particularly described hereinbefore is for a switch in which the sliding motion is a linear one so that a linear switch is obtained.
  • the invention is suitable for application to switches using other motions of which a rotary motion is particularly convenient. In that case the aperature through which the complementary contact carriers interengage is generally circular.
  • the carriers include apertures 18 which correspond to the similarly numbered apertures in the carriers described hereinbefore.
  • the contact carrier in this example has four arms 21 disposed symmetrically about a hub part 22, each arm having a respective aperture 18.
  • the hub part 22 has a central concavity 23 in the upperside with an aperture 24 axially therein. To one side is a projection 25 and the concavity has a rim 26 extending over slightly greater than 270° leaving a part 27 of less than 90 0 having no rim 26.
  • two identical contact carriers are disposed on opposite sides of a circuit board having an aperture sufficient to accommodate the locking parts 25 and 26.
  • the contact carriers are axially aligned and offered to the aperture at relative rotational positions so that the projections 25 of each, approach the part of the other at which there is the gap 27 in rim 26.
  • each projection 25 is sufficiently introduced the two contact carriers are rotated relative to the other so that each part 25 is engaged under the rim 26 of the other. The rotation is continued until the projections 25 are on opposite sides of the axis and the arms 21 of each are aligned on opposite sides of the circuit board.
  • Figure 13 shows two contact carriers, each in the section view of Figure 11, fully engaged on opposite sides of a circuit board 27.
  • the circuit board has an aperture 28 through which the interlocking parts 25 and 26 engage.
  • the arrangement allows of firm, but not permanent, interlocking ' of the 'two parts' so that the two carriers may be rotated about their common axis 29 to effect the switching action.
  • Figure 14 shows in part an assembled pair of contact carriers as in Figure 13 but with the contacts 7 in position as in the fully assembled switch.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
EP19820303271 1981-07-16 1982-06-23 Kontaktanordnung für Schalter Withdrawn EP0070629A2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8121935 1981-07-16
GB8121935 1981-07-16
GB8202966 1982-02-02
GB8202966 1982-02-02

Publications (1)

Publication Number Publication Date
EP0070629A2 true EP0070629A2 (de) 1983-01-26

Family

ID=26280144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820303271 Withdrawn EP0070629A2 (de) 1981-07-16 1982-06-23 Kontaktanordnung für Schalter

Country Status (1)

Country Link
EP (1) EP0070629A2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2451917A (en) * 2007-08-14 2009-02-18 Fluke Corp Multimeter rotary switch assembly
US8089776B2 (en) * 2006-06-19 2012-01-03 Sony Ericsson Mobile Communications Ab Side switch for a contact exposed on an edge of a circuit board and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8089776B2 (en) * 2006-06-19 2012-01-03 Sony Ericsson Mobile Communications Ab Side switch for a contact exposed on an edge of a circuit board and method
GB2451917A (en) * 2007-08-14 2009-02-18 Fluke Corp Multimeter rotary switch assembly
US8093516B2 (en) 2007-08-14 2012-01-10 Fluke Corporation Digital multimeter having improved rotary switch assembly
GB2451917B (en) * 2007-08-14 2012-05-09 Fluke Corp Digital multimeter having improved rotary switch assembly
US8946571B2 (en) 2007-08-14 2015-02-03 Fluke Corporation Digital multimeter having improved rotary switch assembly

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19830426

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GATLAND, KENNETH