WO2005088779A1 - Electrical plug - Google Patents
Electrical plug Download PDFInfo
- Publication number
- WO2005088779A1 WO2005088779A1 PCT/ZA2005/000051 ZA2005000051W WO2005088779A1 WO 2005088779 A1 WO2005088779 A1 WO 2005088779A1 ZA 2005000051 W ZA2005000051 W ZA 2005000051W WO 2005088779 A1 WO2005088779 A1 WO 2005088779A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plug
- cover
- base
- pins
- electrical
- Prior art date
Links
- 238000009429 electrical wiring Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 claims description 2
- 206010014405 Electrocution Diseases 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/28—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
-
- 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
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
- H01R13/512—Bases; Cases composed of different pieces assembled by screw or screws
-
- 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
- H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
- H01R13/5804—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2103/00—Two poles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
- H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
- H01R43/24—Assembling by moulding on contact members
Definitions
- This invention lies in the field f electrical appliances and electrical goods, in particular plugs, sometimes called wall plugs, as they are plugged into a plug socket in a wall. Such plugs are also plugged into plug sockets of extension cables or plug adapters.
- plugs fail, due to the often repeated pulling out and pushing back in of the plugs.
- the construction of the plugs that fail is that they have a base and a cover and the cover is gripped when a plug is pulled out. After many repetitions, or not many if the plug socket is tight, which sometimes happens, the cover comes away from the base, leaving the base in the plug socket.
- the plug socket may be live, due to a wall plug socket switch having been left on, or due to the plug being plugged into an extension cord of the type, which are common, which have no switch. This exposes the terminal posts of the plug pins and wiring, which are live and hence a serious danger of electrocution.
- Plugs provided as original equipment with new appliances may be of the type in which the plug is an integral injection moulded body with the wiring entering the body and the plug pins projecting from the plug body.
- the invention is not applicable to this type of plug.
- the purpose of the plug cover, in plugs that have them is to allow connection of wiring to the plug pins, usually by connection to binding posts.
- the plug cover is removed to allow connection of the wiring to the binding posts and then replaced to protect against the danger of electrocution.
- the design principle of these plugs is thus that the plug base serves the function of mounting the plug pins and binding posts and the plug cover protects against electrocution and is removable to allow connection of wiring.
- the fault of these plugs arises because the plug cover is grasped to pull the plug out of a plug socket, due to the fact that the base is close up against the plug socket.
- An electrical plug in accordance with this invention has a plug base, a plug cover, electrical pins for connection with a plug socket, binding means for connection of electrical wiring and is characterized in that the electrical pins are mounted in the plug cover.
- the plug pins pass through holes in the plug base when the plug lid is connected to the plug base. It will be appreciate although, that the connection of the plug cover to the plug base is not subjected to the stress that the type of prior plugs described above are when the plug is pulled out of a plug socket.
- the plug may be further characterized by its base being given features of shape that cause it to clamp wiring onto the binding means when the lid and base are connected. These features of shape may include an aperture through which the wiring enters the plug, passages which lead the wiring to the holes for the pins and springy parts of the holes which clamp the wire to the pins upon connecting the base and cover of the plug.
- the plug may be given clamps that hold wiring firmly in the plug at the aperture where the wiring enters the plug, once the base and cover are assembled together.
- the binding posts may be conventional in that they have holes into which wiring is inserted and screws that clamp the wiring in the holes.
- the binding posts may often be an integral extension of the plug pins.
- the plug pins may be given formations at a base area of the pins, which enhances a bond between the plug pin and the plug cover in which it is mounted.
- the ends of the plug pins may be embedded in the plug cover, when the cover is injection moulded, and that end of the pin may be given an undercut, a slot, a spread panel, a projection or another shape that helps the bond.
- the cover may be fastened to the base by means of a screw or screws, e.g. of the type that are currently used to join the base and cover and which give the trouble described above. This trouble does not arise with the present invention, for the reason given.
- Figure 1 is a view of a plug from the rear, with base and lid partly separated for illustration purposes,
- Figure 2 is a view of a plug from the side, with base and lid partly separated for illustration purposes,
- Figure 3 is a view of the inside of the plug base of the plug shown in figure 1
- Figure 4 is a view of the inside of the cover of the plug shown in figure 1 ,
- Figure 5 is a view of another plug, seen diagonally from the rear, with base and lid partly separated for illustration purposes,
- Figure 6 is a view of the lid of the plug shown in figure 5
- Figure 7 is a view of the base of the plug shown in figure 5.
- an electrical plug 1 has a plug base 2, a plug cover 3, electrical pins 4, 5 and 6 for connection with a plug socket (not shown), binding means in the form of holes 7, 8 and 9 respectively and screws 10, 11 and 12 for connection of electrical wiring (not shown) and is characterized in that the electrical pins 4, 5 and 6 are mounted in the plug cover 3.
- the plug pins 4, 5 and 6 pass through holes 13, 14 and 15 in the plug base when the plug lid is connected to the plug base.
- the plug is given clamps 16 and 17 that hold wiring firmly in the plug at the aperture 18A -18B where the wiring enters the plug, once the base and cover are assembled together.
- the ends of the plug pins are embedded in the plug cover when the cover is injection moulded and the embedded ends of the pins are given an undercut (not shown) that helps the bond between pin and cover.
- the cover is fastened to the base by means of screws 19 and 20, shown in the views of figures 2 to 4 screwed into posts 21 and 22 that are moulded integrally with the cover; to screw the cover to the base the screws are first passed through the holes 23 and 24 in the base and then screwed into the posts in the cover.
- the plug has the same features as have been described with reference to figures 1 to 4 and in addition the plug's base has features of shape that cause it to clamp wiring onto the pins when the lid and base are connected.
- the plug's base has features of shape that cause it to clamp wiring onto the pins when the lid and base are connected.
- passages 25 lead the wiring to grooves 26, 27 and 28 over which each wire passes and holes 29, 30 and 31 into which the bared (insulation stripped off) wire enters.
- the holes have a springy part 32, 33 and 34, which allows the diameter to open under force.
- the pins enter the holes they engage with the wires and connect electrically with them, the springy parts of the holes yielding to the extent necessary and keeping a good pressure and hence good electrical contact.
- the pins enter the holes when the cover and base are brought together, this example shows a clip connector 35 for keeping the cover and base connected.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA200402108 | 2004-03-17 | ||
ZA2004/2108 | 2004-03-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005088779A1 true WO2005088779A1 (en) | 2005-09-22 |
Family
ID=34966159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ZA2005/000051 WO2005088779A1 (en) | 2004-03-17 | 2005-03-16 | Electrical plug |
Country Status (2)
Country | Link |
---|---|
WO (1) | WO2005088779A1 (en) |
ZA (1) | ZA200607373B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016061212A1 (en) * | 2014-10-16 | 2016-04-21 | Hubbell Incorporated | Wire terminal assembly and adapter kit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2098812A (en) * | 1981-03-19 | 1982-11-24 | Mcafee Robert Montgomery | Electrical plugs |
DE19511410A1 (en) * | 1995-03-28 | 1996-10-02 | Framatome Connectors Int | Electrical plug-in connector with assembly security e.g. for motor vehicle airbag restraint system |
-
2005
- 2005-03-16 WO PCT/ZA2005/000051 patent/WO2005088779A1/en active Application Filing
-
2006
- 2006-09-04 ZA ZA200607373A patent/ZA200607373B/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2098812A (en) * | 1981-03-19 | 1982-11-24 | Mcafee Robert Montgomery | Electrical plugs |
DE19511410A1 (en) * | 1995-03-28 | 1996-10-02 | Framatome Connectors Int | Electrical plug-in connector with assembly security e.g. for motor vehicle airbag restraint system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016061212A1 (en) * | 2014-10-16 | 2016-04-21 | Hubbell Incorporated | Wire terminal assembly and adapter kit |
US9601841B2 (en) | 2014-10-16 | 2017-03-21 | Hubbell Incorporated | Wire terminal assembly and adapter kit |
US10020600B2 (en) | 2014-10-16 | 2018-07-10 | Hubbell Incorporated | Wire terminal assembly and adapter kit |
Also Published As
Publication number | Publication date |
---|---|
ZA200607373B (en) | 2008-04-30 |
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