EP1335455B1 - Sicherheitssystem mit zweifacher Abdeckung - Google Patents

Sicherheitssystem mit zweifacher Abdeckung Download PDF

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Publication number
EP1335455B1
EP1335455B1 EP02002955A EP02002955A EP1335455B1 EP 1335455 B1 EP1335455 B1 EP 1335455B1 EP 02002955 A EP02002955 A EP 02002955A EP 02002955 A EP02002955 A EP 02002955A EP 1335455 B1 EP1335455 B1 EP 1335455B1
Authority
EP
European Patent Office
Prior art keywords
conductive
prong
housing
resilient member
resilient
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
EP02002955A
Other languages
English (en)
French (fr)
Other versions
EP1335455A1 (de
Inventor
Charles S. Baxter
Willard Francis Amero Jr
Grant H. Llloyd
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.)
Motorola Mobility LLC
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Priority to DE60238596T priority Critical patent/DE60238596D1/de
Priority to EP02002955A priority patent/EP1335455B1/de
Priority to AT02002955T priority patent/ATE492048T1/de
Publication of EP1335455A1 publication Critical patent/EP1335455A1/de
Application granted granted Critical
Publication of EP1335455B1 publication Critical patent/EP1335455B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/44—Means for preventing access to live contacts
    • H01R13/447—Shutter or cover plate
    • H01R13/453—Shutter or cover plate opened by engagement of counterpart
    • H01R13/4536—Inwardly pivoting shutter

Definitions

  • This invention relates generally to mechanical electrical connections, and more particularly to a dual-actuating shutter safety system that protects the interior conductive contacts within a housing.
  • Power supplies use mechanical contacts to make a power connection between a source and a host device.
  • the most common contact is a male plug having a pair of prongs which fit into a female power socket, which typically is rigidly fit within a wall.
  • the male-female power interconnection is common in other power accessories, such as power adapters and chargers.
  • One major concern of the power interfaces is the live contacts. If a person touches the active power contacts, the person could feel a microshock tingle, and may further damage the host device. To protect the power interconnection, it is common to place a guard or barrier over the apertures of a female socket such that objects are unable to enter the interior of the power socket and touch the electrical contacts. Thus, for the power interconnection to be made, one has to remove the guard or barrier from the female power socket.
  • the safety criteria may include a minimum distance between a live contact and any exterior opening or aperture of the adapter housing.
  • safety regulations may also require a covering for the apertures of female power sockets that retards the entry of objects into the housing to contact the conductive contacts.
  • One further common regulation is the limitation of the extent that the prong can extend outside of the housing while in live contact with the conductive contact in the interior of the housing.
  • Other regulations include a minimum cover resistance force.
  • a shutter safety system that can block the apertures of a female power housing and which will allow objects, such as prongs, to pass and contact the conductive contacts only upon force being exerted on the shutters.
  • Such system should also allow the prongs to be substantially within the housing prior to contacting the conductive contacts, and thereby conducting current, to comply with existing safety regulations. It is thus to the provision of such an improved shutter safety system that the present invention is primarily directed.
  • US patent no. 2,579,538 describes electrical connecting plugs for domestic appliances and to wall outlet receptacles to receive the plugs.
  • the plugs include two electrical contact prongs and a ground prong for providing the ground connection.
  • the outlet receptacle comprises a base of insulating material and a hollow interior.
  • the electrical connections are provide by a contact strip in the hollow interior which strip has free ends which extend upwardly for registering with two slots in the face of the receptacle, the slots being arranged to receive the electrical contact prongs.
  • Each free end of the contact strip carries an insulating cap which closes the slot when the contacts are in an inoperative position and which has a recess for receiving the corresponding contact prong when in an operative position so that electrical contact may be completed.
  • the face of the receptacle has a hollow rivet for receiving the ground prong.
  • the ground prong is inserted into the hollow rivet and the ground prong is arranged to push the caps so that the recesses in the caps are aligned with the slots in the receptacle face so that the contact prongs can pass through the slots into the recesses and make contact with the ends of the contract strip.
  • the resilience in the contact strips and ends spring the ends back to an inoperative position so that the slots are closed by the caps.
  • a dual actuating shutter safety system 10 in a housing 12 having a plurality of apertures 14 and 16 providing access to conductive contacts for a first conductive prong 18 and a second conductive prong 20.
  • the prongs 18,20 are shown here as rigidly affixed to a plug 22, the prongs 18,20 can be attached to other known electronic devices that use prongs to make power interconnections.
  • the housing 12 here is preferably a power adapter which allows a power interconnection between a power source and a device which is unable to directly draw power from the power source.
  • the adapter connects to the power source and alters the power in whatever manner is needed for usage by the device, and the device plugs into the adapter to draw the usable power.
  • the specific power components of the housing 12 are well known in the art of power adapters and accessories.
  • adapters are often used with power cords from other electronic devices, such as camcorders and laptop computers.
  • prongs When prongs are inserted into the adapter that are not designed for the adapter, if there is a backstop to the prongs, the prongs might not fully insert into the housing such that the prongs are exposed while they conduct power.
  • the system 10 does not have a backstop to prevent the full insertion of prongs of a length greater then the prongs for which the housing 12 is designed to fit to prevent a live prong 18,20 extending from the housing 12.
  • the system 10 provides a simple manner in which to protect the apertures 14,16 from objects entering within the housing 12 through the use of a first resilient member 24 and second resilient member 26 that are each rigidly affixed within the housing 12.
  • Each resilient member 24,26 has a proximal non-conductive segment 28,30 and each of which are resiliently held in aperture 14 and 16 respectively.
  • the resilient members 24,26 further include a distal conductive segment 32,34 and each of which resiliently held within the housing 12.
  • the conductive segments 32,34 are a pair of conductive contacts that will carry a current if touched by a conductive object.
  • the non-conductive segments 28,30 act a shutter mechanism that closes off the apertures 14,16 to block access to the conductive contacts when the device is not in use.
  • the shutter mechanism preferably withstands at least 5N force applied with a 1 mm test probe in the direction of arrow B, which complies with the safety requirements of the regulatory agencies of most countries.
  • This invention thus incorporates the conductive contacts and shutter mechanism into one system.
  • the non-conductive segment spring 36 arm acts as the shutter mechanism, and the conductive segment spring 38 and the conductive contact spring 40 effect a resilient contact between the prongs 18,20 and the conductive contact segments 32,34.
  • It is preferred that the non-conductive segments 28,30 are moved from the apertures 14,16, in the direction of arrow B, with at least 5 N of force. As stated above, this level of resiliency complies with many of the safety regulations that regulatory bodies have requiring shutters to have to impede contact with a live conductive contact.
  • One preferred method of construction of the resilient members 24,26 is to form them from a single piece of resilient conductive metal into a shape having the springs 36,38,40.
  • the non-conductive segments 28,30, plastic is preferably molded over the metal of the non-conductive segment 28,30 to ensure the insulation of the shutter.
  • the non-conductive segments 28,30 are protective shutters which impede conductive contact with the resilient members 24,26 and entry into the housing 12.
  • the resilient members 24,26 provide the safety features desirous in a male-female power socket interconnection, as the plug 22 is moved in the direction of arrow A to fit within the apertures 14,16.
  • the first prong 18 and second prong 20 of the plug 22 are selectively forced, in the direction of arrow A, past the proximal non-conductive segments 28,20 of the resilient members 24,26, and the first prong 18 and second prong 20 make conductive contact with the resilient conductive segments 32,34 of the resilient members 24,26.
  • the first prong 18 and second prong 20 are selectively placed to abut the non-conductive segments 28,30 respectively, and such motion aligns the plug 22 to force the prongs 18,20 into the housing and make a power interconnection.
  • the force of the prongs 18,20 reaches or exceeds 5N (in the direction of arrow A)
  • the prongs 18,20 will begin to force the non-conductive segments backward, against the opposition of the spring arms 36 of the resilient members 24,26.
  • the prongs 18,20 are forcing back the proximal non-conductive segments 28,30 of the first resilient member 24 and second resilient member 26 whereby the prongs 18,20 enter the housing 10 and can ultimately make contact with the conductive segments 32,34. It can be seen that even as the prongs 18,20 enter the housing 12 through the apertures 14,16, the prongs 18,20 do not contact the conductive segments 32,34 so that the prongs 18,20 are not conducting current while they are exposed from the housing 12. Because the prongs 18,20 only contact the non-conductive segments 28,30 while the prongs 18,20 are being inserted into the housing 12, the prongs 18,20 are insulated from the resilient members 24,26 until actual contact is made between the prongs 18,20 and the conductive segments 32,34.
  • the plug 22 is fully inserted into the housing 12, and the first prong 18 and second prong 20 make conductive contact with the resilient conductive segments 32,34 of the resilient members 24,26, at contact points 42.
  • the plug 22 is flush with the housing 12, at plug-housing interfaces 44 such that there is not greater than 5 mm of clearance between the housing 12 and plug 22.
  • the 5 mm or less clearance between the housing 12 and the plug 22 will comply with most safety regulations regarding the access to electrified parts of devices.
  • the non-conductive segments 28,30 Upon withdrawal of the first prong 18 and second prong 20 from the housing 10 and apertures 14,16, the non-conductive segments 28,30 will again resiliently cover the apertures 14,16. Such action blocks entry to housing 12 through the apertures 14,16 and can prevent the use of the adapter (housing 12) with other power cords of devices, as well as providing a safety barrier to persons attempts to insert objects into the housing 12, such as a child attempting to insert a key or paperclip.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
  • Air Bags (AREA)

Claims (6)

  1. Sicherheitssystem (10) mit Doppelbetätigungs-Verschlussklappe in einem Gehäuse (12), welches eine Vielzahl von Öffnungen (4, 16) zur Bereitstellung eines Zugangs zu leitenden Kontakten für eine Vielzahl leitfähiger Kontaktstifte (18, 20) aufweist, einschließlich mindestens eines ersten Kontaktstiftes (18) und eines zweiten Kontaktstiftes (20), wobei das System Folgendes aufweist:
    mindestens ein erstes federndes Bauteil (24) sowie ein zweites federndes Bauteil (26), wobei jedes Bauteil in dem Gehäuse (12) starr befestigt ist, und wobei jedes federnde Bauteil einen proximalen nicht-leitenden Abschnitt (28, 30) aufweist, welcher federnd in der Öffnung zur Schließung der Öffnung gehalten wird, wenn das Gehäuse nicht in Gebrauch ist, sowie einen distalen leitenden Abschnitt (32, 34), welcher federnd in dem Gehäuse gehalten wird, wobei die leitenden Abschnitte ein Paar leitender Kontakte aufweisen, und wobei das System dadurch gekennzeichnet ist, dass:
    das zumindest eine erste federnde Bauteil (24) und zweite federnde Bauteil (26) derart konfiguriert sind, dass bei Verwendung die proximalen nicht-leitenden Abschnitte (28, 30) des ersten (24) und des zweiten (26) federnden Bauteils durch den ersten Kontaktstift (18) und den zweiten Kontaktstift (20) nach hinten gedrückt werden, so dass der erste Kontaktstift (18) und der zweiten Kontaktstift (20) wahlweise hinter die proximalen nicht-leitenden Abschnitte des ersten und zweiten federnden Bauteils gedrückt werden, und der erste Kontaktstift und der zweite Kontaktstift einen leitenden Kontakt mit den federnden leitenden Abschnitten (32, 34) der federnden Bauteile herstellen, und nach der Entfernung des ersten Kontaktstifts und des zweiten Kontaktstifts aus dem Gehäuse und den Öffnungen, die nicht-leitenden Abschnitte die Öffnungen erneut federnd abdecken.
  2. System nach Anspruch 1, dadurch gekennzeichnet, dass der nicht-leitende Abschnitt von der Öffnung mit einer Kraft von mindestens 5 N wegbewegt wird.
  3. System nach Anspruch 1, dadurch gekennzeichnet, dass jedes federnde Bauteil aus einem einzelnen Stück leitfähigen Metalls gebildet ist, und dass der nicht-leitende Abschnitt gebildet wird, indem Kunststoff über dem distalen Abschnitt des federnden Metallbauteils angeordnet wird.
  4. System nach Anspruch 1, dadurch gekennzeichnet, dass der erste Kontaktstift und der zweite Kontaktstift starr an einem Stecker befestigt sind.
  5. System nach Anspruch 4, dadurch gekennzeichnet, dass die leitfähigen Kontaktstifte einen Netzadapter aufweisen.
  6. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jedes federnde Bauteil aus einem einzelnen Stück leitfähigen Materials in eine Form gebracht wird, welche neben dem nicht-leitenden Abschnitt eine Feder an dem nicht-leitenden Abschnitt aufweist, um ein Gegenlager bzw. eine Gegenstellung bereitzustellen, wenn der nicht-leitende Abschnitt nach hinten gedrückt wird, um als Verschlussmechanismus zu wirken, wobei eine Feder f(38) des leitenden Abschnitts und eine Feder (40) des leitenden Kontakts angeordnet sind, um einen federnden Kontakt z wischen einem Kontaktstift (18, 20) und dem leitenden Abschnitt (32, 34) zu bewirken.
EP02002955A 2002-02-11 2002-02-11 Sicherheitssystem mit zweifacher Abdeckung Expired - Lifetime EP1335455B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE60238596T DE60238596D1 (de) 2002-02-11 2002-02-11 Sicherheitssystem mit zweifacher Abdeckung
EP02002955A EP1335455B1 (de) 2002-02-11 2002-02-11 Sicherheitssystem mit zweifacher Abdeckung
AT02002955T ATE492048T1 (de) 2002-02-11 2002-02-11 Sicherheitssystem mit zweifacher abdeckung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02002955A EP1335455B1 (de) 2002-02-11 2002-02-11 Sicherheitssystem mit zweifacher Abdeckung

Publications (2)

Publication Number Publication Date
EP1335455A1 EP1335455A1 (de) 2003-08-13
EP1335455B1 true EP1335455B1 (de) 2010-12-15

Family

ID=27589101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02002955A Expired - Lifetime EP1335455B1 (de) 2002-02-11 2002-02-11 Sicherheitssystem mit zweifacher Abdeckung

Country Status (3)

Country Link
EP (1) EP1335455B1 (de)
AT (1) ATE492048T1 (de)
DE (1) DE60238596D1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9196997B2 (en) 2011-11-10 2015-11-24 Panduit Corp. Shuttered LC adapter
US9494746B2 (en) 2011-11-10 2016-11-15 Panduit Corp. Shuttered LC adapter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579538A (en) 1948-02-19 1951-12-25 Elwin A Andrus Electrical outlet with insulating closures
NL291247A (de) * 1962-04-11
US3736547A (en) * 1971-09-22 1973-05-29 G Koenig Three wire grounded receptacle with safety lock
JP2944095B2 (ja) * 1988-03-11 1999-08-30 ブラック アンド デッカー インコーポレイティド 電池式工具の電池ケース及び充電器

Also Published As

Publication number Publication date
EP1335455A1 (de) 2003-08-13
ATE492048T1 (de) 2011-01-15
DE60238596D1 (de) 2011-01-27

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