GB2470219A - An intrinsically safe electrical outlet - Google Patents

An intrinsically safe electrical outlet Download PDF

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Publication number
GB2470219A
GB2470219A GB0908320A GB0908320A GB2470219A GB 2470219 A GB2470219 A GB 2470219A GB 0908320 A GB0908320 A GB 0908320A GB 0908320 A GB0908320 A GB 0908320A GB 2470219 A GB2470219 A GB 2470219A
Authority
GB
United Kingdom
Prior art keywords
live wire
connecting block
plug
electrical outlet
conductive
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Withdrawn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
GB0908320A
Other versions
GB0908320D0 (en
Inventor
Shu-Hang Lee
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0908320A priority Critical patent/GB2470219A/en
Publication of GB0908320D0 publication Critical patent/GB0908320D0/en
Publication of GB2470219A publication Critical patent/GB2470219A/en
Withdrawn legal-status Critical Current

Links

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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling 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
    • 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
    • H01R13/4532—Rotating shutter
    • 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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
    • H01R13/7036—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling

Abstract

An electrical outlet includes a live wire stub 11 and a live wire conductive clip 12. The live wire stub is sleeved with a protective device 20 having a housing 21, a movable connecting block 22 and a return spring 23. When a pin (31, Fig 3) of the plug is inserted into the electrical outlet, the connecting block is rotated so that the live wire conductive clip is electrically connected with the live pin of the plug. As the live wire stub is sleeved with protective device 20 metal objects or other conductive bodies may not come into contact with the live wire conductive clip 12 and cause electric shock or leakage even if they are extended accidentally into the outlet. The socket is safe since the live wire conductive clip is electrically connected with the plug's live wire pin only when certain force is applied to the plug pin to insert it into the jack. The connecting block may be moved by the insertion of the live pin of the plug, or it may have an insulating portion (26, Fig 5) and be operated by the insertion of an earth pin.

Description

AN INTRINSICALLY SAFE ELECTRICAL OUTLET
BACKGROUND OF INVENTION
1. Field of the Invention
The present invention relates generally to an electrical outlet, and more particularly to an intrinsically safe one which can prevent electric shock and leakage.
2. Description of Related Art
As for existing electrical outlets, the jacks are generally exposed. If metal objects or other conductive bodies are brought accidentally into contact the metal sheet in the jack, serious safety hazards exist due to possible electric shock and leakage.
To resolve this problem, the electrical outlets have been modified in the design work, such as a flapper is arranged in front of the jack; when connected with the plug, the pin of the plug can be inserted into the jack by pushing off the flapper; when the pin is removed, the flapper can be reset automatically to seal the jack. Such design could improve the safety of electrical outlet to some extent. However, in case where the flapper isn't fully reset during frequent operation, some metal objects are possibly inserted into the jack, leading to safety hazards arising from electric shock and leakage.
SUMNIARY OF TILE INVENTION
The main objective of the invention is to provide a new intrinsically safe electrical outlet that can prevent electric shock and leakage for higher safety.
The intrinsically safe electrical outlet of this invention comprises an electrical outlet housing enclosed with a live wire stub and a live wire conductive clip, of which the live wire stub is sleeved with a protective device; the protective device is provided with an casing, wherein there are a moveable connecting block and a corresponding return spring; when the pin of the plug is inserted into the electrical outlet, the connecting block is activated so that the live wire conductive clip is electrically connected with the live wire pin of the plug.
A chamber is opened in front of the housing of the protective device, and the connecting block made of conductive material is located within the chamber; the rear end is close to the live wire conductive clip, the front end protruded closely to the jack on the electrical outlet housing, the lower end mated with the chute on the side wall of housing via a pivot, and the upper end mated with the return spring at rear end of the chamber; when the plug's live wire pin is inserted into the electrical outlet, the connecting block is driven to contact the live wire conductive clip, so that the live wire conductive clip is electrically connected with the plug's live wire pin.
A limitation bar for limiting the rotation angle of connecting block is arranged at front top of the chamber.
Iii the front of the housing of protective device, there is a chamber, wherein the connecting block is located; a conductive foundation is placed at the bottom of the chamber, and connected with the jack clip of live wire correspondingly to the live wire jack; the connecting block is made of insulative portion and conductive portion, of which the insulative portion is close to the jack of groundlzero wire of the electrical outlet housing, with its upper end mated with the return spring at rear end of the chamber; the conductive portion is close to the live wire conductive clip, with its lower end mated rotarily with the conductive foundation; when the ground/zero wire pin of the plug is inserted into the electrical outlet, the conductive portion of the connecting block is pushed to contact the live wire conductive clip, so that the live wire conductive clip is electrically connected with the plug's live wire pin.
The connecting block's insulative portion is made of plastic sheet, and conductive portion made of copper block.
The connecting block's insulative portion and conductive portion are adhered together, or adhered onto a wedged surface.
The advantages of this utility model include: as the live wire stub in the electrical outlet housing is sleeved with a protective device, the metal objects or other conductive bodies may not get contact with the live wire conductive clip and cause electric shock or leakage even if they are extended accidentally into the jack; electric conduction between the live wire conductive clip and the plug's live wire pin occurs only when a certain force is applied to the plug pin and insert it into the jack.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an exploded view of the preferred embodiment of the invention; FIG. 2 shows a front view of the preferred embodiment of the invention that the electrical outlet is mated with the plug; FIG. 3 shows an A-A sectional view of FIG. 2; FIG. 4 shows a front view of the second preferred embodiment of the invention; FIG. 5 shows a B-B sectional view of FIG. 4; FIG. 6 shows another preferred embodiment of the invention FIG. 7 shows another front view of the preferred embodiment of invention that the electrical outlet is mated with the plug; FIG. 8 shows a C-C sectional view of FIG. 7.
DETAILED DESCRIPTION OF TIlE INVENTION
The following paragraphs present the preferred embodiments of the utility model, without limitation of the scope of the Claims.
Embodiment 1 Referring to FIGS. 1 -j 3: the intrinsically safe electrical outlet of the utility model is provided with a rectangular electrical outlet housing 10, wherein there are a live wire stub 11 and a live wire conductive clip 12; the live wire stub is sleeved with a protective device 20, which is provided with a housing 21, at front of which a chamber 211 is placed; the connecting block 22 made of copper is located within the chamber 211, of which the rear end is close to the live wire conductive clip 12, the front end protruded closely to the jack 101 on the electrical outlet housing 10, the lower end mated with the chute 212 on the side wall of housing 21 via a pivot 221, and the upper end mated with the return spring 23 at rear end of the chamber 211; besides, a limitation bar 213 for limiting the rotation angle of connecting block 22 is arranged at front top of the chamber 211.
When the live wire pin 31 of the plug 30 is inserted into the electrical outlet housing 10 from the live wire jack 101, the live wire pin 31 contacts the bulge at front middle portion of the connecting block 22, and pushes the connecting block 22 to rotate and contact the live wire conductive clip 12, so that the live wire conductive clip 12 is electrically connected with the live wire pin 31 of the plug 30. When the plug 30 is removed from the electrical outlet, the connecting block 22 is rotated counterclockwise under the action of the return spring 23, such that the connecting block 22 is disengaged from the live wire conductive clip 12. With such design, the safety of electrical outlet could be improved greatly even if the metal objects or other conductive bodies are extended accidentally into the live wire jack 101.
Embodiment 2 Referring to FIGS. 4--7: a conductive foundation 24 is arranged at the bottom of the chamber 211 of the housing 21 of the protective device 20, and connected with the jack clip of live wire 25 correspondingly to the live wire jack; the connecting block 22 is composed by splicing of plastic insulative portion 26 and copper conductive portion 27 into a wedged surface; the insulative portion 26 is close to the ground wire jack 102 (or zero line jack) of the electrical outlet housing 10, of which its upper end is mated with the return spring 23 at rear end of the chamber 211, and supported by the return spring 23 onto the flange 103 of ground wire jack 102; the conductive portion 27 is close to the live wire conductive clip 12, with its lower end mated rotarily with the conductive foundation 24 via axle 271.
When the ground wire pin 32 of the plug 30 is inserted into the electrical outlet housing 10 from the ground wire jack 102, the ground wire pin 32 pushes the connecting block 22, and makes conductive portion 27 get in touch with the live wire conductive clip 12, so that the live wire conductive clip 12 is electrically connected with the live wire pin 31 of the plug 30. When the plug 30 is removed from the electrical outlet, the connecting block 22 is rotated counterclockwise under the action of the return spring 23, such that the connecting block 22 is disengaged from the live wire conductive clip 12.

Claims (7)

  1. CLAIMS: 1. A intrinsically safe electrical outlet, fitted with a housing accommodating a live wire stub and a live wire conductive clip; it is characterized in that: the live wire stub is sleeved with a protective device, which is provided with a housing that accommodates a mobile connecting block and a return spring; when the plug pin is inserted into the electrical outlet, the connecting block is activated so that the live wire conductive clip is electrically connected with the plug's live wire pin.
  2. 2. The structure defined in Claim 1, wherein a chamber is opened in front of the housing of the protective device; the connecting block made of conductive material is located within the chamber, of which the rear end is close to the live wire conductive clip, the front end protruded closely to the live wire jack on the electrical outlet housing, the lower end mated with the chute on the side wall of housing via a pivot, and the upper end mated with the return spring at rear end of the chamber; when the plug's live wire pin is inserted into the electrical outlet, the connecting block is driven to contact the live wire conductive clip, so that the live wire conductive clip is electrically connected with the plug's live wire pin.
  3. 3. The structure defmed in Claim 1, wherein a limitation bar for limiting the rotation angle of connecting block is arranged at front top of the chamber.
  4. 4. The structure defined in Claim 1, wherein a chamber is opened in front of the housing of the protective device, and the connecting block is located within the chamber; a conductive foundation is placed at the bottom of the chamber, and connected with the jack clip of live wire correspondingly to the live wire jack; the connecting block is made of insulative portion and conductive portion, of which the insulative portion is close to the jack of ground/zero wire of the electrical outlet housing, with its upper end mated with the return spring at rear end of the chamber; the conductive portion is close to the live wire conductive clip, with its lower end mated rotarily with the conductive foundation; when the ground/zero wire pin of the plug is inserted into the electrical outlet, the conductive portion of the connecting block is pushed to contact the live wire conductive clip, so that the live wire conductive clip is electrically connected with the plug's live wire pin.
  5. 5. The structure defmed in Claim 4, wherein the connecting block's insulative portion is made of plastic sheet, and conductive portion made of copper block.
  6. 6. The structure defmed in Claim 5, wherein the connecting block is composed by splicing of plastic insulative portion and copper conductive portion into a wedged surface
  7. 7. An intrinsically safe electrical outlet substantially as hereinbefore described and with reference to the accompanying drawings.
GB0908320A 2009-05-14 2009-05-14 An intrinsically safe electrical outlet Withdrawn GB2470219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0908320A GB2470219A (en) 2009-05-14 2009-05-14 An intrinsically safe electrical outlet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0908320A GB2470219A (en) 2009-05-14 2009-05-14 An intrinsically safe electrical outlet

Publications (2)

Publication Number Publication Date
GB0908320D0 GB0908320D0 (en) 2009-06-24
GB2470219A true GB2470219A (en) 2010-11-17

Family

ID=40834005

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0908320A Withdrawn GB2470219A (en) 2009-05-14 2009-05-14 An intrinsically safe electrical outlet

Country Status (1)

Country Link
GB (1) GB2470219A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543347A (en) * 1941-01-10 1942-02-20 J A Crabtree And Company Ltd Improvements in, and connected with socket tubes for electrical apparatus
GB2332571A (en) * 1997-12-09 1999-06-23 Hsiang Yu Lung Safety socket
US6111210A (en) * 1999-07-30 2000-08-29 Allison; John B. Electrical safety outlet
US6229107B1 (en) * 1999-08-06 2001-05-08 Steven G Flint Safety electrical receptacle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543347A (en) * 1941-01-10 1942-02-20 J A Crabtree And Company Ltd Improvements in, and connected with socket tubes for electrical apparatus
GB2332571A (en) * 1997-12-09 1999-06-23 Hsiang Yu Lung Safety socket
US6111210A (en) * 1999-07-30 2000-08-29 Allison; John B. Electrical safety outlet
US6229107B1 (en) * 1999-08-06 2001-05-08 Steven G Flint Safety electrical receptacle

Also Published As

Publication number Publication date
GB0908320D0 (en) 2009-06-24

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)