CN1132280C

CN1132280C - Safety plug

Info

Publication number: CN1132280C
Application number: CN998119318A
Authority: CN
Inventors: T·J·赫伦德
Original assignee: Telefonaktiebolaget LM Ericsson AB
Current assignee: Telefonaktiebolaget LM Ericsson AB
Priority date: 1998-10-08
Filing date: 1999-09-28
Publication date: 2003-12-24
Anticipated expiration: 2019-09-28
Also published as: ID28987A; WO2000021161A1; AU1302500A; EP1119886A1; JP2002527863A; SE515246C2; JP4361694B2; SE9803457D0; MY123339A; BR9914323A; CN1322393A; KR20010080029A; SE9803457L

Abstract

The present invention relates to an apparatus (10) for supplying current to electric appliances. More specifically the invention concerns a construction of a plug that will minimise the risk for plug damage and human bodily harm. Said apparatus (10) comprises a device casing (12) and an interchangeable adapter plug (14) which are joined to one operating unit. The device casing (10) is covering and protecting electronic current supplying components and carries a first electrical connector (20) and a second electrical connector (22). The interchangeable adapter plug (14) has an adapter plug casing (28) with electrical connector pins (30) and an adapter plug connector (24) that is connectable with said first electrical connector (20) of the device casing (12). The apparatus has moment device (50) that helps the device casing (12) to separate from the interchangeable adapter plug (14) irrespective of the orientation of a pulling force acting on said device casing.

Description

A kind of electric current is fed to device on the electrical equipment

The field of the invention

The present invention relates to a kind of device that electric current is fed to electrical equipment.More specifically say, relate to a kind of structure of plug, this plug can reduce the danger that plug damages and human body is hurt to greatest extent.

Background of the present invention

The problem of putting in face of the manufacturer of electric power supply apparatus and battery charger is that various plug design will be arranged.Though the sale of many electric devices is all over the world, to the design of electric connector, the size of pin, shape, position and number be the neither one world standard also.Travel to for those and will carry the particularly people of phone and computer device of electric device all over the world, the difference of plug also is a problem deserving of attention.Traditional solution of this Machine Design problem provides an interchangeable adaper plug, this adapter comprises that a socket can accept the pin of electric device such as transformer or battery charger, according to the configuration and the second cover pin formation one of output electricity on local socket or the wall mouthful.

A kind of device that electric current is fed to electrical equipment, particularly movable electrical appliances of explanation in U.S. Pat 5540596.This device has a housing that is provided with plug, and the electric component and the electronic component of supply of current wherein is housed.In order to simplify this device and various electrical socket configuration is used together, be provided with several interchangeable adaper plugs, but these plug removals be contained on the plug casing.Each adaper plug all is provided with the connector pin, and the electrical socket configuration that its shape and layout and various countries use meets.The adapter housing is provided with the connector spring, connector surface coupling on circuit of the power supply that this spring and connector pin and plug casing are supported.Plug casing has a recess, has the tongue piece of an electronic circuit board to extend into its interior connector surface that also forms thereon.When assembling, the adapter housing is fitted in the recess, makes the connector surface engagement of connector spring and wiring board.A releasable pressing lock of being made up of adapter housing and plug casing is fixed together these two housings.Time spent has a closing cap removably to be placed on the recess when this installs not, makes its injury-free and pollution so as to protecting this device.

Alternating current (AC) is supplied on electric device such as the battery charger from the wall delivery outlet that powers on.Hand over charging can cause injury, therefore must design electric device like this and make that heavy current can not be exposed when this device quilt is misapplied humans and animals.

In the charger of electric equipment such as mobile phone, the AC electric current of 110-200 volt (V) is changed into direct current (DC) electric current of 2-8V.The DC electric current directs on the connected equipment from charger by the rope or the cable of a flexibility.The rope of this flexibility must bear pulling force and bending, therefore must have facility so that eliminate the input of rope and the strain at fastening place.But power on delivery outlet when being spurred energetically again if this rope is connected to wall, this pulling force will produce very big power and moment on the electric delivery outlet on charger, its pin and the wall so.Charger will act on as lever arm.The present age, known supply of electric power device and battery charger with interchangeable adaper plug fixed with trough and plastic buckle.Plug is fixed on the housing of charger or supply of electric power device without any flexibility.Whole effects of the power of sending on the rope will be recharged the conduction of device or supply of electric power device, electric delivery outlet on adaper plug, its pin and the wall is suffered damage and produce wrong acting on.

Summary of the present invention

The problem that will be solved is, AC delivery outlet and this device of directly inserting on the wall when electric power supply apparatus are subjected to asymmetric power or load and how this device reduces power and the strain that causes on the each several part at this device when having interchangeable standard plug.

Another problem that will solve is how to design supply of electric power device or the charger apparatus that an electric supply installation for example has device case and interchangeable standard plug, and wherein said plug is not to use fastening means and lock, door bolt, groove, clasp or closing cap device on said device case.

An object of the present invention is to work as AC delivery outlet and this device that plug is directly inserted on the wall and be subjected to asymmetric power or carry when reduce power and the strain that on the each several part of this device, causes.

Another object of the present invention is to design a power supply or a charging device with interchangeable standard plug, and wherein said device case and plug are without any recess, passage, groove or closure.

It is to improve degree of safety that the present invention also has another purpose, prevents that the accident that can cause fire, death and injury from taking place.

Said problem is resolved, and way is a moment device is set on the device of adaper plug limits said device case separately need be applied to power on the device case from the adaper plug having.

More detailed point says, adopts a moment device to help device case from interchangeable adaper plug separately and can be regardless of the direction that acts on the pulling force on the said device case.

Compared to the prior art, an advantage of the present invention be for can reducing the danger that acts on the effect of making a mistake on the electric supply installation owing to powerful power and load to greatest extent, at device case from still being inserted in outside wall powers on adaper plug in the delivery outlet separately the back is exposed to without any observable or tangible conductive pieces.

Owing to removed some parts such as recess, passage, groove, lock, clasp, door bolt or closure, the manufacturing cost of electric supply installation can reduce.Be used for fixing in addition that the rope strain relief facility that is connected also can save between rope and the device case.

Following the present invention will be with regard to preferred embodiment explanation in more detail in conjunction with the accompanying drawings.

Brief description of drawings

Fig. 1 a is for being fed to electric current on the end view of the prior art electric supply installation on the electrical equipment.

Fig. 1 b only illustrates the adaper plug of prior art.

Fig. 1 c is the end view of existing electric supply installation when the DC rope in the device other end is spurred very rambunctiously that is inserted in the wall dress electrical socket.

Fig. 2 is the end view of an embodiment of the device invented.

Fig. 3 is the end view of an embodiment of the adaper plug of being invented that separates from device case.

Fig. 4 is the embodiment identical with Fig. 3 view in the connector side.

Fig. 5 illustrates when being connected to the rope that is powered on the electrical equipment and being spurred rambunctiously device of the present invention and how to work.

The detailed description of preferred embodiment

Fig. 1 a illustrates the end view that electric current is fed to the prior art electric supply installation 10 on the electrical equipment.Said device 10 has a device case 12 and an interchangeable adaper plug 14, and they are connected with door bolt 18 with bayonet cap 16 and are firmly fixed on the device case 12.Device case 12 is used for covering and protecting the electronic component of power supply.First electric connector 20 and second electric connector 22 on circuit with the

element coupling.Connector

20 and 22 all respectively is contained on the wiring board and by said housing 12 and stretches out.Adaper plug connector 24 removably is connected on said first connector 20.Flexible strand 26 has a rope connection 34 to be connected on second electric connector 22, and electric power is directed on the electrical equipment (not shown).Rope 26 has a strain relief means 32 to be used for reducing rope connection 34 and the impaired danger of second electric connector.

Fig. 1 b just illustrates the connector side of prior art adaper plug.Said plug comprises an adaper plug housing 28.

Electric connector pin

30,18 and adaper plug connectors 24 of locking device (pushing facility).The direction that adaper plug connector 24 is positioned to electric connector pin 30 meets at right angles basically.

Fig. 1 c is the end view that is inserted in the prior art electric supply installation 10 in the wall dress electrical socket 42.The power that flexible strand 26 is subjected to the pull unit upper end makes the upper end that is provided with second connector 22 leave wall 40.How many adaper plugs 14 is lockable on the socket 42 in wall 40 and device case 12 is lockable on adaper plug 14.Device case 12 will act on as lever arm.Plug 14 can not be extracted in socket 42 if breaking-up power has a bad orientation, and plug will break.Can make like this in face of the conductive pieces that has dangerous electric power is exposed to, and may be touched by the people.Other parts of electric supply installation also may be damaged as the housing of second electric connector, electronic component, the thin portion of soldering or device.Wall 40 and socket delivery outlet 42 with dashed lines in the drawings draw.

Fig. 2 illustrates each the different part that electric current is fed to an embodiment of the device of the present invention on the electrical equipment.This device has a device case 12 and an interchangeable adaper plug 14, and this plug 14 is connected that

device facility

20 and 24 is connected on the operating unit 10 and any locking useless or push device.

Device case 12 covers and protection power supply electronic component.Electronic component is disposed on the printed substrate with first and second electric connectors, and this rain electric connector supports with the element coupling and by said housing on circuit.First electric connector has the pin 20 that is subjected to device case 12 protections.The flexible strand that electric power is fed on the electrical equipment is connected on said second connector 22.Between this rope and said connector, do not need to adorn strain relief means.

Regardless of the direction that acts on the pulling force on the said device case how moment device 50 between device case 12 and adaper plug 14 can these device cases 12 of supporting, make it can be from interchangeable adaper plug 14 separately and can be.

Fig. 3 is the end view of an embodiment of the of the present invention interchangeable adaper plug 14 that separated from device case 12.This standard plug 14 has an adaper plug housing 28, electric connector pin 30 and an adaper plug connector 24.Said connector 24 removably is connected with the said electric connector 20 of device case 12, and stretches out from adaper plug housing 28, meets at right angles basically with electric connector pin 30.Conductive pieces in the said pin 30 usefulness plug casings is operably connected on the adaper plug connector 24.This pin 30 is commonly called pin, and their quantity, shape and layout are different with plug.The user should select adaper plug that its be fit to be inserted in the pin receiving socket of the electrical socket of required charging or power supply or the electric delivery outlet on the wall.

14 usefulness of this device case 12 and interchangeable adaper plug, first electric connector 20 is connected with adaper plug connector 24.First electric connector 20 comprises a conducting sleeve device with the lid protection.It is submissive than the remainder of housing that this lid can be made.First electric connector 20 has the conduction pin that clings in sleeve when assembling device housing 12 and adaper plug 14.Device case 12 and interchangeable adaper plug 14 by the cover of adaper plug plainly-packed put and the pin of first electric connector 20 between frictional force keep together.

Connector is separated required intensity of force can be called as release force, the width and the height that change the moment device can be controlled release force.Said release force depends on the sleeve of socket and the frictional force between the pin.Design by pin connector and housing connector can change release force.

The situation that Fig. 4 looks from connector side 46 for the adaper plug 14 among Fig. 3.But this adaper plug 14 have a moment device 50 aid-device housings 12 from interchangeable adaper plug 14 separately and can regardless of act on device case 12 or the direction of 26 upper pulling forces of restricting how.The design of adaper plug 14 can limit and make said device case 12 separate the required power that acts on the device case 12 from the adaper plug housing.

Moment device 50 is linked on the adaper plug housing 28, and is bearing on the peripheral edge of device case 12.Boundary line between moment device 50 and the connector side walls 46 is marked by dotted line.

This embodiment of moment device 50 one is added on the adapter housing 28 the design edge around adaper plug connector 24.Wall in the connector side can be configured to cup-shaped, and electrical connector can be positioned in these moment device 50 inboards Anywhere.

Moment device among Fig. 3 and 4 is used for making it to cooperate the external dimensions of this device case.The height of said housing is identical therewith with width dimensions that is to say.But the height of moment device 50 and width are changeable in recess of the present invention.In another embodiment of device of the present invention, moment device 50 is connected on the adaper plug housing 28, and be bearing on the first connector side 44 of this device case 12 the peripheral edge inboard Anywhere.

Another embodiment of device of the present invention is attached to the first connector side 44 of this device case 12 with moment device 50 and is bearing on the sidewall of adaper plug connector.

Another embodiment of device of the present invention is attached to the first moment device 50 the first connector side of this device case 12, and the corresponding second moment device 50 is attached to adaper plug connector side 46 and is bearing on the said first moment device 50.

This device case does not need any recess, passage, groove or closure, therefore can simplify the design of housing greatly.

How device of the present invention worked when Fig. 5 illustrated rope on being connected to the electrical equipment that is powered and spurred rambunctiously.Moment device 50 plays the effect of this device case 12 of supporting when housing 12 is raised, and pulling force makes first connector 20 separately can not produce any infringement from adaper plug connector 24.This device case 12 stands on the moment device 50, can pivot.Adaper plug 14 still can insert in the socket 42 on the wall, outside the electric conductor that is safe from danger is exposed to.Wall 40 and socket delivery outlet 42 all with dashed lines draw.

Claims

1. one kind is fed to device on the electrical equipment with electric current, and said device has a device case and an interchangeable adaper plug that is connected on the operating unit,

Said device case covers and is protecting the power supply electronic component,

Said device case supports first electric connector and second electric connector,

Said interchangeable adaper plug has the adaper plug housing with an adaper plug connector, can be connected with said first electric connector of this device case, also has the electric connector pin, be operably connected with this adaper plug connector, the shape of pin and layout are suitable to be inserted in the pin receiving socket of electrical socket

It is characterized by,

There is a moment device can help this device case and interchangeable adaper plug separately, and can be regardless of the direction that acts on the pulling force on the said device case.

2. by the device of claim 1, it is characterized by, said moment device is linked on this adaper plug housing and is bearing on the outer rim of this device case.

3. by the device of claim 1 or 2, it is characterized by, this device case only is connected with the adaper plug connector with this first electric connector with interchangeable adaper plug.

4. by the device of claim 3, it is characterized by, this device case and interchangeable adaper plug keep together with the frictional force between the pin of the sleeve of this adaper plug connector and first electric connector.

5. by the device of claim 1, it is characterized by, this adaper plug connector stretches out on this adaper plug housing, meets at right angles basically with the pin of this electric connector.

6. by the device of claim 1, it is characterized by, the flexible strand (26) that is used for supplying power on the electrical equipment is connected on said second connector (22).

7. by the device of claim 6, it is characterized by, said device is an electric supply installation.

8. by the device of claim 7, it is characterized by, said device is a battery charger.

9. by the device of claim 7 or 8, it is characterized by, said device is connected on mobile radio communication apparatus or the mobile personal computer device.