EP1335455A1 - Sicherheitssystem mit zweifacher Abdeckung - Google Patents

Sicherheitssystem mit zweifacher Abdeckung Download PDF

Info

Publication number
EP1335455A1
EP1335455A1 EP02002955A EP02002955A EP1335455A1 EP 1335455 A1 EP1335455 A1 EP 1335455A1 EP 02002955 A EP02002955 A EP 02002955A EP 02002955 A EP02002955 A EP 02002955A EP 1335455 A1 EP1335455 A1 EP 1335455A1
Authority
EP
European Patent Office
Prior art keywords
conductive
prong
housing
prongs
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.)
Granted
Application number
EP02002955A
Other languages
English (en)
French (fr)
Other versions
EP1335455B1 (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 EP02002955A priority Critical patent/EP1335455B1/de
Priority to DE60238596T priority patent/DE60238596D1/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.
  • 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. While 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. Moreover, 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)
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
EP02002955A EP1335455B1 (de) 2002-02-11 2002-02-11 Sicherheitssystem mit zweifacher Abdeckung
DE60238596T DE60238596D1 (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 true EP1335455A1 (de) 2003-08-13
EP1335455B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103930812A (zh) * 2011-11-10 2014-07-16 泛达公司 装有遮光器的lc适配器
US9494746B2 (en) 2011-11-10 2016-11-15 Panduit Corp. Shuttered LC adapter

Citations (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
DE1440823A1 (de) * 1962-04-11 1968-11-21 Bassani Spa Sicherheitssteckdose mit Riegelverschluss
US3736547A (en) * 1971-09-22 1973-05-29 G Koenig Three wire grounded receptacle with safety lock
EP0332475A2 (de) * 1988-03-11 1989-09-13 Black & Decker Inc. Batterielader und Batteriegehäuse

Patent Citations (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
DE1440823A1 (de) * 1962-04-11 1968-11-21 Bassani Spa Sicherheitssteckdose mit Riegelverschluss
US3736547A (en) * 1971-09-22 1973-05-29 G Koenig Three wire grounded receptacle with safety lock
EP0332475A2 (de) * 1988-03-11 1989-09-13 Black & Decker Inc. Batterielader und Batteriegehäuse

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103930812A (zh) * 2011-11-10 2014-07-16 泛达公司 装有遮光器的lc适配器
US9196997B2 (en) 2011-11-10 2015-11-24 Panduit Corp. Shuttered LC adapter
CN103930812B (zh) * 2011-11-10 2016-03-02 泛达公司 装有遮光器的lc适配器
US9494746B2 (en) 2011-11-10 2016-11-15 Panduit Corp. Shuttered LC adapter
US9709754B2 (en) 2011-11-10 2017-07-18 Panduit Corp. Shuttered LC adapter
US10012799B2 (en) 2011-11-10 2018-07-03 Panduit Corp. Shuttered LC adapter

Also Published As

Publication number Publication date
ATE492048T1 (de) 2011-01-15
DE60238596D1 (de) 2011-01-27
EP1335455B1 (de) 2010-12-15

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