CA2055079A1 - Plug-in power supply adapter - Google Patents
Plug-in power supply adapterInfo
- Publication number
- CA2055079A1 CA2055079A1 CA 2055079 CA2055079A CA2055079A1 CA 2055079 A1 CA2055079 A1 CA 2055079A1 CA 2055079 CA2055079 CA 2055079 CA 2055079 A CA2055079 A CA 2055079A CA 2055079 A1 CA2055079 A1 CA 2055079A1
- Authority
- CA
- Canada
- Prior art keywords
- power supply
- adapter
- case
- supply adapter
- plug
- 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.)
- Abandoned
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
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6675—Structural association with built-in electrical component with built-in electronic circuit with built-in power supply
Abstract
PLUG-IN POWER SUPPLY ADAPTER
ABSTRACT OF THE DISCLOSURE
An improved power supply adapter is provided for plug-in connection to a standard AC power supply receptacle, and to provide a DC voltage to an associated electronic instrument. The power supply adapter comprises a relatively compact case having an end face with a plurality of conductive prongs protruding therefrom for plug-in connection to an AC receptacle, such as one socket of a standard duplex or quad wall outlet or the like. An AC adapter assembly is mounted within the adapter case with the components of the AC
adapter assembly arranged generally in-line between the conductive prongs and a power cord adapted for connection to the associated electronic instrument. This in-line geometry permits the adapter case to have a relatively narrow width and low profile height conforming with a single electrical socket, whereby plug-in connection of the adapter to an electrical socket does not obstruct access to adjacent sockets. In addition, in a preferred form, the adapter case further includes a mounting clip for convenient removable connection to the associated electronic instrument when the power supply adapter is not in use.
ABSTRACT OF THE DISCLOSURE
An improved power supply adapter is provided for plug-in connection to a standard AC power supply receptacle, and to provide a DC voltage to an associated electronic instrument. The power supply adapter comprises a relatively compact case having an end face with a plurality of conductive prongs protruding therefrom for plug-in connection to an AC receptacle, such as one socket of a standard duplex or quad wall outlet or the like. An AC adapter assembly is mounted within the adapter case with the components of the AC
adapter assembly arranged generally in-line between the conductive prongs and a power cord adapted for connection to the associated electronic instrument. This in-line geometry permits the adapter case to have a relatively narrow width and low profile height conforming with a single electrical socket, whereby plug-in connection of the adapter to an electrical socket does not obstruct access to adjacent sockets. In addition, in a preferred form, the adapter case further includes a mounting clip for convenient removable connection to the associated electronic instrument when the power supply adapter is not in use.
Description
PLUG-IN POWER SUPPLY ADAPTER
BhCKGROUND OF THE INVENTION
This invention relates generally ~o an improved s AC adapter of the type used to provide a DC voltage to an associated electronic instrument from an AC supply voltage. More particularly, this invention relates to a compact and low profile power supply adapter for plug-in connection to a standard electrical socket, ~u without obstructing or interfering with adjacent electrical sockets of a standard duplex or guad wall outlet or the like. The invention is particularly designed for use with electronic instruments in a medical environment, and further includes means for 15 removably mounting the power supply adapter onto or in close association with the instrument when not in use.
Modern medical treatment facilities utilize a variety of sophisticated electronic instruments in the course of patient diagnosis and treatment. As one 20 common example, electronically operated medication infusion pumps are commonly used for administering one or more selected medical fluids to a patient at a - prescribed flow rate and time schedule. Such fluid medication infusion pumps and other electronic 25 equipment require a source o~ electrical power to maintain the instrument in a desired operational state.
In this regard, many electronic instruments designed for medical as well as nonmedical uses are constructed to operate on a DC power supply which can be obtained in the alternativ2 from batteries or by use of an appropriate transformer and rectifier ~ connected to a standard AC power source. In this - latter case, the AC adapter frequently comprises a power supply adapter designed for direct plug~in ~ connection to an AC power supply outlet, with an - ~ , ' .' .' . : ~, ' - , . . . ..
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BhCKGROUND OF THE INVENTION
This invention relates generally ~o an improved s AC adapter of the type used to provide a DC voltage to an associated electronic instrument from an AC supply voltage. More particularly, this invention relates to a compact and low profile power supply adapter for plug-in connection to a standard electrical socket, ~u without obstructing or interfering with adjacent electrical sockets of a standard duplex or guad wall outlet or the like. The invention is particularly designed for use with electronic instruments in a medical environment, and further includes means for 15 removably mounting the power supply adapter onto or in close association with the instrument when not in use.
Modern medical treatment facilities utilize a variety of sophisticated electronic instruments in the course of patient diagnosis and treatment. As one 20 common example, electronically operated medication infusion pumps are commonly used for administering one or more selected medical fluids to a patient at a - prescribed flow rate and time schedule. Such fluid medication infusion pumps and other electronic 25 equipment require a source o~ electrical power to maintain the instrument in a desired operational state.
In this regard, many electronic instruments designed for medical as well as nonmedical uses are constructed to operate on a DC power supply which can be obtained in the alternativ2 from batteries or by use of an appropriate transformer and rectifier ~ connected to a standard AC power source. In this - latter case, the AC adapter frequently comprises a power supply adapter designed for direct plug~in ~ connection to an AC power supply outlet, with an - ~ , ' .' .' . : ~, ' - , . . . ..
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elongated cord extending between the plug-in adapter and the associated electronic instrument used to supply DC to the instrument.
In he past, plug-in power supply adapters have s included a relatively compact housing or case having the components of an AC adapter mounted therein.
Conductive prongs associated with the transformer components have protr~lded outwardly from the adapter case for plug-in connection in the manner of a o standard electrical plug with an associated AC power supply receptacle, such as one socket of a standard duplex or quad wall outlet, or a multisocket strip, or the liXe.
Accordingly, the adapter case essentially comprises the body of an electrical plug for manual grasping in the course of plug-in and unplugging movements. However, the physical size and shape of the adapter case has typically ~xceeded the width and height of a conventional electrical plug, such that the adapter case partially overlies and therefore obstructs access to adjacent electrical sockets. For example~ in a conventional duplex or quad wall outlet, plug-in connection of a single AC/D~ power supply ; adapter to one of the electrical ~ockets normally 25 obscures and thus precludes access to all of the remaining electrical sockets in the wall outlet.
Additional electrical devices which may be desirad or necessary, especially in a medical treatment facility must therefore be plugged into a different wall 30 outlet~
Moreover, in a medical treatment environment, it is often necessary to transport electronic medical instruments from one place to another. For example, : fluid infusion pumps are often transported with 3s patients throughout different areas of a hospital or the like, or from one patient room to another for use -, : : .
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elongated cord extending between the plug-in adapter and the associated electronic instrument used to supply DC to the instrument.
In he past, plug-in power supply adapters have s included a relatively compact housing or case having the components of an AC adapter mounted therein.
Conductive prongs associated with the transformer components have protr~lded outwardly from the adapter case for plug-in connection in the manner of a o standard electrical plug with an associated AC power supply receptacle, such as one socket of a standard duplex or quad wall outlet, or a multisocket strip, or the liXe.
Accordingly, the adapter case essentially comprises the body of an electrical plug for manual grasping in the course of plug-in and unplugging movements. However, the physical size and shape of the adapter case has typically ~xceeded the width and height of a conventional electrical plug, such that the adapter case partially overlies and therefore obstructs access to adjacent electrical sockets. For example~ in a conventional duplex or quad wall outlet, plug-in connection of a single AC/D~ power supply ; adapter to one of the electrical ~ockets normally 25 obscures and thus precludes access to all of the remaining electrical sockets in the wall outlet.
Additional electrical devices which may be desirad or necessary, especially in a medical treatment facility must therefore be plugged into a different wall 30 outlet~
Moreover, in a medical treatment environment, it is often necessary to transport electronic medical instruments from one place to another. For example, : fluid infusion pumps are often transported with 3s patients throughout different areas of a hospital or the like, or from one patient room to another for use -, : : .
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-3-with different patients as the need arises. While such instruments may be battery powered for short term operation in a mobile environment, it is important that the electrical power cor~ and associated power s supply adapter remain with the instrument so that normal operation can be resumed quickly and easily by mere plug-in connection of the adapter to a power supply outlet.
However, transport of the power supply adapter and associated cord with the instrument poses particular problems in that the adapter is relatively heavy and thus difficult to transport with the instrument in a secure and stable manner and/or can become easily separated from the instrument and is 15 thus rPlatively easily misplaced.
There exists, therefore, a significant need for an improved power ~upply adapter of the plug-in type wherein the adapter can be plugged into a standard electrical socket without interfering with access to adjacent sockets, and furlher wherein the adapter includes means for convenient and stable mounting in a ; stored position in association with an electronic instrument for transport purposes. The present invention fulfills these needs and provides further 2s related advantages.
SUMMARY OF THE INVENTION
In accordance with the invention, an improved power supply adapter is provided for plug-in 30 connection to a standard AC power supply receptacle and to provide a DC voltage to an associated ~-~ electronic instrument, particularly such as a medical instrument. The power supply adapter is designed with an AC adapter assembly mounted within a compact 35 adapter case having an end face with conductive plug prongs protruding therefrom. The components of the i, ..
:' . ~ ; , ~ ' . ' ' ' ' ' ' ' ~ ' , 'S' transformer assembly are arranged generally in-line between the conductive prongs and a power cord, such that the case can be constructed with a narrow width and low profile height to avoid obstructing adjacent s electrical sockets of a standard duplex or quad wall outlet or the like.
The case of the power supply adapter further includes means for relatively simple removable mounting in a stored position on or in close o association with the electronic instrument when the power supply adapter is not in use. In a preferred form, the mounting means comprises a mou~ting clip formed integrally with the adapter case ~or secure yet removable mounting onto a bracket arm or other support 5 structure associated with the electronic instrument.
Other features and advantages of the present ; invention will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings which illustrate, by way of example, the principles of the invention.
DESCRIPTION OF THE DRAWINGS
These and other advantages of the present invention are best understood with reference to the 2s drawings, in which:
Fig. 1 is a front perspective view illustrating an alectronic medical instrument with an associated power cord and a plug-in power supply adapter embodying the novel features of the invention;
Fig. 2 is an enlarged rear perspective view of the power supply adapter;
Fig. 3 is an enlarged top plan view of the power supply adapter, with a portion of the adapter case removed to illustrate the arrangement of components of s an AC adapter assembly;
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Fig. 4 is an exploded perspective view o~ the power supply adapter;
Fig. 5 is a fragmented perspective view illustrating mounting of the power supply adapter in a s stored position in association with the electronic instrument of Fig. 1; and Fig. 5 is a sectional view depicting an alternative preferred form of the power supply adapter.
DETAILED DESCRIPTION OF_THE PREFERRED EMBODIMENT
As shown in the exemplary drawings, an improved AC adapt~r re~erred to generally in Fig. 1 by the reference numeral lO is provided for use with an .: Is electronic instrument 12, such as a fluid medication . infusion pump. The power supply adapter lO is designed for quick and easy plug-in connection to ~
standard AC power supply rec:eptacle 14, and to provide a DC voltage via a power cord 16 to the electronic instrument 12. The AC adapter 10 is particularly constructed with an ~longated geometry having a `: relatively narrow width and low profile height, such : that the AC adapter lO does not obstruct or otherwise ,`i; inter~ere with access to adjacent electrical sockets 17 of a multisocket receptacle 14.
Although the power supply adapter lO of the present invention may be used with a wide range of electrical and/or electronic instruments, the illustrative drawings show the adapter lO in a preferred environment of use, namely, in association with an electronic instrument 12 in a medical : environment. Fig. 1 illustrates the instrument 12 in the form of a fl~id medication infusion pump corresponding with the MiniMed III fluid infusion pump 35 marketed by MiniMed Technologies of Sylmar, ,~ : ' ~ ' ' ' , ' . , ~. -:: . . : .
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California, which infuslon pump shall also be referred to by the reference numeral 12.
The illustrative in~usion pump 12 comprises a relatively compact instrument adapted for mounting onto a conventional portable medical equipment pole 18 by means of an appropriate clamp fixture 20, such as an adjustable clamp fixture of the type described in U.S. Patent 4,832,29~, which is incorporated by reference herein. The infusion pump 12 is shown to o include multiple parallel pumping systems for independent programming and control to regulate administration of multiple medical fluids from appropriate reservoirs 22 to the patient (not shown) via suitable tubing 24.
~s The electronic control components and associated electrcnically powered pumping devices are integrated into the housing of the infusion pump 12. The infusion pump 12 is designed for normal operation by connection to an appropriate 120 volt AC power supply ; 20 receptacle 14 by means of the AC adapter 10 and the power cord 16, with the AC adapter 10 comprising an adapter for supplying a se:lected DC voltage to the infusion pump 12.
As shown best in Figs. 2-4, the AC adapter lO
includes a relatively compact housing or case defined by a lower base 28 and an upper cap 30O These case components, in the preferred form, are ~onstructed from a relatively lightweight and high impact molded : plastic, such as glass-filled nylon. The base 28 and the cap 30 have a generally shell-shaped configuration which cooperatively define a hollow case interior for receiving and supporting the components of an AC
adapter electrical assembly 32.
More ~pecifically, the AC adapter electrical assembly 32 comprises a tranisformer 34 securely seated ; within the base 28 in a nested or cradled relation ~. - . . , ~ , ' ~. ,: . ~ . , ' :
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with respect to a plurality of short locator tabs 36.
The transformer 34 is positioned in close proximity with a forward end wall 38 from which a plurality of conductive prongs 40 pro~rude in a conventional three s prong array for plug-in connection to the AC power supply receptacle 14. In the preferred form, these conductive prongs 40 are securely mounted near their rear ends within the end wall 38 as by means of insert molding or the like.
10rrhe remaining components of the AC adapter electrical assembly 32 are mounted within the adapter case in a generally in-line configuration with respect to the transformer 34 and the conductive prongs 40.
Figs. 3 and 4 show these remaining components in the s orm of a filter capacitor 42 and a rectifier 44. All o~ these transformer components are appropriately coupled electrically by means o~ suitable conductive wires 46.
; A selected trio of the wires 46 are assembled within a protective outer sheath 48 to define the power cord 16 connected to the associated electronic instrument 12. In this regard, these conductive wires 46 are suitably collected for passage through a notch 50 formed in a rear end wall 52 of the base 28. A
~: 2;strain relief fitting 54 is mounted at the rear end wall 52 and defines a flexible structu~al member connected between the base 28 and the power cord 16 to anchor the power cord 16 securely to the adapter 10.
In other words, the strain relief fitting 54 has a mounting head plate 56 at one end thereof for seated reception against an inboard side 9f the rear end wall 52 on the base 28, with a narrow neck 58 adjacent the head plate 56 and sized for close-fit reception through the open notch 50. From the neck 58, the 3s strain relief fitting 54 includes an alternating .~sequence of plate and nec~ segments 60 and 62 which ~ , . ` ~ ' ' define a flexible structure to securely retain the associated end of the power cord 16 therein.
Importantly, the strain relie~ itting 54 is designed to permit flexure (Fig. 2) substantially at s the adapter case as may be required for adapter use in close clearance locations. Moreover, the fitting 54 is desi~ned to prevent or resist cord ~reakage at the adapter as may otherwise occur, for example, when the adapter is unplugged by pulling on the power cord 16.
o With the AC adapter electrical assembly 32 installed within the lower base 28 and the strain relief fitting 54 mounted thereto, the adapter case is closed by mounting the cap 30 onto the base 28. Such mounting may occur by use of snap-fit connections, ultrasonic weldingr and/or adhesive, with a permanently closed adapter ase construction being desired.
The resultant AC adapter 10 includes the components of the AC adapter electrical assembly 32 in ~o a substantially in-line arrangement between the conductive prongs 40 and the power cord 16. The adapter 10 thus has an elongated shape which can be easily grasped and/or manipulated manually for plug-in connection to and unplugging from a power supply receptacle.
The elongated AC adapter electrical assembly 32 further presents a relatively narrow width and low profile height conforming generally with the dimensions of a standard ele~trical power plug, such that plug-in connection of the AC adapter 10 to an ~ electrical socket 17 ~Fig. 13 does not interfere with :~ or otherwise obstruct access to adjacent electrical - sockets 17 of a typical duplex, quad, or strip outlet 17. As a result, t~e adjacent sockets 17 remain s available for easy access and plug-in connection with i -. ., :
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other electronic instruments as may be necessary or desirable.
- Although the specific size and shape of the AC
adapter 10 of the present invention may vary according 5 to a range of design criteria, it is noted that the width and height of the adapter case are predominantly a function of the size and shape of the transformer 34. In this regard, through the use of a compact transformer such as that available from ISL Products o International, Ltd., of Syosset, N~w York, under model desi~nation EI 41, it has been possible to ~onstruct an AC adapter lO with a low profile height of about 1.5 to 1~6 inch and a narrow width of about 1.7 to 1.8 inch~
In accordance with further aspects of the improved AC adapter 10 of the present inYention ~ the assem~led adapter case defines a rearwardly projecting mounting clip 64 for convenient removable mounting of the AC adapter 10 in a stored position with respect to zo the associated eiectronic instrument 12. The clip 64 is shown in the form of a rearwardly projecting clip leg 66 formed integrally with the basa 28 and/or cap 30 at one side of the cas~. Conveniently, to prevent undesired increase in the case width or height, the s clip leg 66 is formed as a continuation of a wider frontal portion of the case within which the ~; transformer core 34 is mounted, but in spaced relation with a narrow rear case portion having the filter : capacitor 42 therein.
~o In the preferred form, the clip leg 66 cooperates with the narrow rear portion of the case to define a rearwardly open slot 68 sized for reception of a bracket arm 70 of the clamp fixture 20, as viewed in Fig. 5. That is, the clip 64 permits the adapter 10 ~ ~ to he removably mounted quickly and easily onto the .~ bracket arm 70 in close stored association with the - ~ . .
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medical instrument 12. A lock tooth 72 at the inboard fres end of the clip leg 66 includes tapered leading and trailing edges for facilitating secure clip-on mounting and subsequent removal of the adapter 10 from 3 the bracket arm 70.
~ support strap 74 having Velcro-type fasteners may also be mounted onto th~ bracket arm 70 for releasably supporting the power cord 16 in a coiled or oth2r suitably compact configuration.
o One alternative preferred form of the improved power supply adapter is shown in Fig. 6, with components corresponding generally with those shown and described in FIGS. 1-5 being identified by common primed re~erence numerals. As shown, a modified adapter 10' includes a tran~former 34' mounted within a compact case in in-line relation with a plurality of : conductive plug prongs 40'. The remaining components of The AC adapter lO' include one or more filter capacitors 42' and a rectifier 44', which are insert molded within a separate case portion 78 spaced rearwardly from the transfor~er 34 r .
A strain relief fi~ting 54' is interposed between th~ transformer 34' and the capacitors 42' and the rectifier 44', with all of the components again positioned in a generally in-line configuration between the prongs 40' and a power cord 16'.
Although an exemplary embodiment of the present invention has been sho~n and described, it will be appaxent to those having ordinary skill in the art that a number of changes, modifications, or alterations to the invention as described herein may be madel none o~ which depart from the spirit of the : present invention. All such changes, modifications, and alterations should therefore be ~een as within the 3~ scope of the present invention.
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However, transport of the power supply adapter and associated cord with the instrument poses particular problems in that the adapter is relatively heavy and thus difficult to transport with the instrument in a secure and stable manner and/or can become easily separated from the instrument and is 15 thus rPlatively easily misplaced.
There exists, therefore, a significant need for an improved power ~upply adapter of the plug-in type wherein the adapter can be plugged into a standard electrical socket without interfering with access to adjacent sockets, and furlher wherein the adapter includes means for convenient and stable mounting in a ; stored position in association with an electronic instrument for transport purposes. The present invention fulfills these needs and provides further 2s related advantages.
SUMMARY OF THE INVENTION
In accordance with the invention, an improved power supply adapter is provided for plug-in 30 connection to a standard AC power supply receptacle and to provide a DC voltage to an associated ~-~ electronic instrument, particularly such as a medical instrument. The power supply adapter is designed with an AC adapter assembly mounted within a compact 35 adapter case having an end face with conductive plug prongs protruding therefrom. The components of the i, ..
:' . ~ ; , ~ ' . ' ' ' ' ' ' ' ~ ' , 'S' transformer assembly are arranged generally in-line between the conductive prongs and a power cord, such that the case can be constructed with a narrow width and low profile height to avoid obstructing adjacent s electrical sockets of a standard duplex or quad wall outlet or the like.
The case of the power supply adapter further includes means for relatively simple removable mounting in a stored position on or in close o association with the electronic instrument when the power supply adapter is not in use. In a preferred form, the mounting means comprises a mou~ting clip formed integrally with the adapter case ~or secure yet removable mounting onto a bracket arm or other support 5 structure associated with the electronic instrument.
Other features and advantages of the present ; invention will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings which illustrate, by way of example, the principles of the invention.
DESCRIPTION OF THE DRAWINGS
These and other advantages of the present invention are best understood with reference to the 2s drawings, in which:
Fig. 1 is a front perspective view illustrating an alectronic medical instrument with an associated power cord and a plug-in power supply adapter embodying the novel features of the invention;
Fig. 2 is an enlarged rear perspective view of the power supply adapter;
Fig. 3 is an enlarged top plan view of the power supply adapter, with a portion of the adapter case removed to illustrate the arrangement of components of s an AC adapter assembly;
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Fig. 4 is an exploded perspective view o~ the power supply adapter;
Fig. 5 is a fragmented perspective view illustrating mounting of the power supply adapter in a s stored position in association with the electronic instrument of Fig. 1; and Fig. 5 is a sectional view depicting an alternative preferred form of the power supply adapter.
DETAILED DESCRIPTION OF_THE PREFERRED EMBODIMENT
As shown in the exemplary drawings, an improved AC adapt~r re~erred to generally in Fig. 1 by the reference numeral lO is provided for use with an .: Is electronic instrument 12, such as a fluid medication . infusion pump. The power supply adapter lO is designed for quick and easy plug-in connection to ~
standard AC power supply rec:eptacle 14, and to provide a DC voltage via a power cord 16 to the electronic instrument 12. The AC adapter 10 is particularly constructed with an ~longated geometry having a `: relatively narrow width and low profile height, such : that the AC adapter lO does not obstruct or otherwise ,`i; inter~ere with access to adjacent electrical sockets 17 of a multisocket receptacle 14.
Although the power supply adapter lO of the present invention may be used with a wide range of electrical and/or electronic instruments, the illustrative drawings show the adapter lO in a preferred environment of use, namely, in association with an electronic instrument 12 in a medical : environment. Fig. 1 illustrates the instrument 12 in the form of a fl~id medication infusion pump corresponding with the MiniMed III fluid infusion pump 35 marketed by MiniMed Technologies of Sylmar, ,~ : ' ~ ' ' ' , ' . , ~. -:: . . : .
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,:
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California, which infuslon pump shall also be referred to by the reference numeral 12.
The illustrative in~usion pump 12 comprises a relatively compact instrument adapted for mounting onto a conventional portable medical equipment pole 18 by means of an appropriate clamp fixture 20, such as an adjustable clamp fixture of the type described in U.S. Patent 4,832,29~, which is incorporated by reference herein. The infusion pump 12 is shown to o include multiple parallel pumping systems for independent programming and control to regulate administration of multiple medical fluids from appropriate reservoirs 22 to the patient (not shown) via suitable tubing 24.
~s The electronic control components and associated electrcnically powered pumping devices are integrated into the housing of the infusion pump 12. The infusion pump 12 is designed for normal operation by connection to an appropriate 120 volt AC power supply ; 20 receptacle 14 by means of the AC adapter 10 and the power cord 16, with the AC adapter 10 comprising an adapter for supplying a se:lected DC voltage to the infusion pump 12.
As shown best in Figs. 2-4, the AC adapter lO
includes a relatively compact housing or case defined by a lower base 28 and an upper cap 30O These case components, in the preferred form, are ~onstructed from a relatively lightweight and high impact molded : plastic, such as glass-filled nylon. The base 28 and the cap 30 have a generally shell-shaped configuration which cooperatively define a hollow case interior for receiving and supporting the components of an AC
adapter electrical assembly 32.
More ~pecifically, the AC adapter electrical assembly 32 comprises a tranisformer 34 securely seated ; within the base 28 in a nested or cradled relation ~. - . . , ~ , ' ~. ,: . ~ . , ' :
:, ~ ', '.:
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with respect to a plurality of short locator tabs 36.
The transformer 34 is positioned in close proximity with a forward end wall 38 from which a plurality of conductive prongs 40 pro~rude in a conventional three s prong array for plug-in connection to the AC power supply receptacle 14. In the preferred form, these conductive prongs 40 are securely mounted near their rear ends within the end wall 38 as by means of insert molding or the like.
10rrhe remaining components of the AC adapter electrical assembly 32 are mounted within the adapter case in a generally in-line configuration with respect to the transformer 34 and the conductive prongs 40.
Figs. 3 and 4 show these remaining components in the s orm of a filter capacitor 42 and a rectifier 44. All o~ these transformer components are appropriately coupled electrically by means o~ suitable conductive wires 46.
; A selected trio of the wires 46 are assembled within a protective outer sheath 48 to define the power cord 16 connected to the associated electronic instrument 12. In this regard, these conductive wires 46 are suitably collected for passage through a notch 50 formed in a rear end wall 52 of the base 28. A
~: 2;strain relief fitting 54 is mounted at the rear end wall 52 and defines a flexible structu~al member connected between the base 28 and the power cord 16 to anchor the power cord 16 securely to the adapter 10.
In other words, the strain relief fitting 54 has a mounting head plate 56 at one end thereof for seated reception against an inboard side 9f the rear end wall 52 on the base 28, with a narrow neck 58 adjacent the head plate 56 and sized for close-fit reception through the open notch 50. From the neck 58, the 3s strain relief fitting 54 includes an alternating .~sequence of plate and nec~ segments 60 and 62 which ~ , . ` ~ ' ' define a flexible structure to securely retain the associated end of the power cord 16 therein.
Importantly, the strain relie~ itting 54 is designed to permit flexure (Fig. 2) substantially at s the adapter case as may be required for adapter use in close clearance locations. Moreover, the fitting 54 is desi~ned to prevent or resist cord ~reakage at the adapter as may otherwise occur, for example, when the adapter is unplugged by pulling on the power cord 16.
o With the AC adapter electrical assembly 32 installed within the lower base 28 and the strain relief fitting 54 mounted thereto, the adapter case is closed by mounting the cap 30 onto the base 28. Such mounting may occur by use of snap-fit connections, ultrasonic weldingr and/or adhesive, with a permanently closed adapter ase construction being desired.
The resultant AC adapter 10 includes the components of the AC adapter electrical assembly 32 in ~o a substantially in-line arrangement between the conductive prongs 40 and the power cord 16. The adapter 10 thus has an elongated shape which can be easily grasped and/or manipulated manually for plug-in connection to and unplugging from a power supply receptacle.
The elongated AC adapter electrical assembly 32 further presents a relatively narrow width and low profile height conforming generally with the dimensions of a standard ele~trical power plug, such that plug-in connection of the AC adapter 10 to an ~ electrical socket 17 ~Fig. 13 does not interfere with :~ or otherwise obstruct access to adjacent electrical - sockets 17 of a typical duplex, quad, or strip outlet 17. As a result, t~e adjacent sockets 17 remain s available for easy access and plug-in connection with i -. ., :
~ r ~~J~
other electronic instruments as may be necessary or desirable.
- Although the specific size and shape of the AC
adapter 10 of the present invention may vary according 5 to a range of design criteria, it is noted that the width and height of the adapter case are predominantly a function of the size and shape of the transformer 34. In this regard, through the use of a compact transformer such as that available from ISL Products o International, Ltd., of Syosset, N~w York, under model desi~nation EI 41, it has been possible to ~onstruct an AC adapter lO with a low profile height of about 1.5 to 1~6 inch and a narrow width of about 1.7 to 1.8 inch~
In accordance with further aspects of the improved AC adapter 10 of the present inYention ~ the assem~led adapter case defines a rearwardly projecting mounting clip 64 for convenient removable mounting of the AC adapter 10 in a stored position with respect to zo the associated eiectronic instrument 12. The clip 64 is shown in the form of a rearwardly projecting clip leg 66 formed integrally with the basa 28 and/or cap 30 at one side of the cas~. Conveniently, to prevent undesired increase in the case width or height, the s clip leg 66 is formed as a continuation of a wider frontal portion of the case within which the ~; transformer core 34 is mounted, but in spaced relation with a narrow rear case portion having the filter : capacitor 42 therein.
~o In the preferred form, the clip leg 66 cooperates with the narrow rear portion of the case to define a rearwardly open slot 68 sized for reception of a bracket arm 70 of the clamp fixture 20, as viewed in Fig. 5. That is, the clip 64 permits the adapter 10 ~ ~ to he removably mounted quickly and easily onto the .~ bracket arm 70 in close stored association with the - ~ . .
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medical instrument 12. A lock tooth 72 at the inboard fres end of the clip leg 66 includes tapered leading and trailing edges for facilitating secure clip-on mounting and subsequent removal of the adapter 10 from 3 the bracket arm 70.
~ support strap 74 having Velcro-type fasteners may also be mounted onto th~ bracket arm 70 for releasably supporting the power cord 16 in a coiled or oth2r suitably compact configuration.
o One alternative preferred form of the improved power supply adapter is shown in Fig. 6, with components corresponding generally with those shown and described in FIGS. 1-5 being identified by common primed re~erence numerals. As shown, a modified adapter 10' includes a tran~former 34' mounted within a compact case in in-line relation with a plurality of : conductive plug prongs 40'. The remaining components of The AC adapter lO' include one or more filter capacitors 42' and a rectifier 44', which are insert molded within a separate case portion 78 spaced rearwardly from the transfor~er 34 r .
A strain relief fi~ting 54' is interposed between th~ transformer 34' and the capacitors 42' and the rectifier 44', with all of the components again positioned in a generally in-line configuration between the prongs 40' and a power cord 16'.
Although an exemplary embodiment of the present invention has been sho~n and described, it will be appaxent to those having ordinary skill in the art that a number of changes, modifications, or alterations to the invention as described herein may be madel none o~ which depart from the spirit of the : present invention. All such changes, modifications, and alterations should therefore be ~een as within the 3~ scope of the present invention.
' ~' ' . " ' ':
" ,.
Claims (20)
1. A power supply adapter for plug-in connection to an electrical socket connected to an AC power supply, said power supply adapter comprising:
an adapter case having first and second opposite ends;
a plurality of conductive prongs protruding from said first end of said case for plug-in connection to the electrical socket; and an AC adapter electrical assembly having a plurality of components mounted within said case in an arrangement disposed generally in-line with said prongs.
an adapter case having first and second opposite ends;
a plurality of conductive prongs protruding from said first end of said case for plug-in connection to the electrical socket; and an AC adapter electrical assembly having a plurality of components mounted within said case in an arrangement disposed generally in-line with said prongs.
2. A power supply adapter as defined in Claim 1, further comprising:
a power cord coupled to said case.
a power cord coupled to said case.
3. A power supply adapter as defined in Claim 2, wherein said power cord is coupled to said second end of said case.
4. A power supply adapter as defined in Claim 2, further comprising:
a strain relief fitting connected between said power cord and said case.
a strain relief fitting connected between said power cord and said case.
5. A power supply adapter as defined in Claim 1, wherein said AC adapter electrical assembly comprises:
a transformer mounted within said case generally adjacent to said first end thereof.
a transformer mounted within said case generally adjacent to said first end thereof.
6. A power supply adapter as defined in Claim 1, wherein said AC adapter electrical assembly comprises:
at least one filter capacitor; and a rectifier.
at least one filter capacitor; and a rectifier.
7. A power supply adapter as defined in Claim 1, further comprising:
a mounting clip located on said case.
a mounting clip located on said case.
8. A power supply adapter as defined in Claim 7, wherein said mounting clip is formed integrally with said case.
9. A power supply adapter for plug-in connection to an electrical socket connected to an AC power supply said power supply adapter comprising:
an adapter case formed from first and second interfitting case members cooperatively defining a hollow case interior, said case having a front end wall and a rear end wall;
a plurality of conductive prongs protruding from said front end wall of said case;
an AC adapter electrical assembly having a plurality of components mounted within said case in an arrangement generally in-line with said prongs, said components including a transformer disposed generally adjacent to said front end wall; and a power cord coupled to said rear end wall of said case.
an adapter case formed from first and second interfitting case members cooperatively defining a hollow case interior, said case having a front end wall and a rear end wall;
a plurality of conductive prongs protruding from said front end wall of said case;
an AC adapter electrical assembly having a plurality of components mounted within said case in an arrangement generally in-line with said prongs, said components including a transformer disposed generally adjacent to said front end wall; and a power cord coupled to said rear end wall of said case.
10. A power supply adapter as defined in Claim 9, further comprising:
a strain relief fitting connected between said power cord and said rear end wall of said case.
a strain relief fitting connected between said power cord and said rear end wall of said case.
11. A power supply adapter as defined in Claim 10, wherein said strain relief fitting comprises:
an alternating sequence of relatively wide plate members and comparatively narrow neck members.
an alternating sequence of relatively wide plate members and comparatively narrow neck members.
12. A power supply adapter as defined in Claim 9, wherein said AC adapter electrical assembly further comprises:
at least one filter capacitor; and a rectifier.
at least one filter capacitor; and a rectifier.
13. A power supply adapter as defined in Claim 9, further comprising:
a mounting clip located on said case.
a mounting clip located on said case.
14. A power supply adapter as defined in Claim 13, wherein said case comprises:
a wider front portion and a cooperatively narrow rear portion, said transformer being mounted within said front portion of said case, and said mounting clip comprising a clip leg projecting rearwardly as a continuation at one side of said front portion and in spaced relation with said rear portion to define a rearwardly open slot.
a wider front portion and a cooperatively narrow rear portion, said transformer being mounted within said front portion of said case, and said mounting clip comprising a clip leg projecting rearwardly as a continuation at one side of said front portion and in spaced relation with said rear portion to define a rearwardly open slot.
15. A power supply adapter as defined in Claim 14, wherein said clip leg comprises:
a ramped lock tooth at an inboard free end thereof.
a ramped lock tooth at an inboard free end thereof.
16. A power supply adapter for plug-in connection to an electrical socket connected to an AC power supply, said power supply adapter comprising:
an adapter case having a distal end and a proximal opposite ends;
a plurality of conductive prongs protruding from said distal end of said case, said plurality of conductive prongs for plug-in connection to the electrical socket;
a transformer located inside said adapter case near said distal end thereof, said transformer being electrically connected to said conductive prongs;
a filter capacitor and a rectifier electrically connected to said transformer, said filter capacitor and said rectifier being located proximal to said transformer whereby the components mounted within said case are disposed in generally in-line fashion with said prongs; and a power cord electrically connected to said rectifier and mechanically connected to said proximal end of said case.
an adapter case having a distal end and a proximal opposite ends;
a plurality of conductive prongs protruding from said distal end of said case, said plurality of conductive prongs for plug-in connection to the electrical socket;
a transformer located inside said adapter case near said distal end thereof, said transformer being electrically connected to said conductive prongs;
a filter capacitor and a rectifier electrically connected to said transformer, said filter capacitor and said rectifier being located proximal to said transformer whereby the components mounted within said case are disposed in generally in-line fashion with said prongs; and a power cord electrically connected to said rectifier and mechanically connected to said proximal end of said case.
17. A power supply adapter as defined in Claim 16, additionally comprising:
a strain relief located at the proximal end of said case.
a strain relief located at the proximal end of said case.
18. A power supply adapter as defined in Claim 16, wherein said case is formed of a distal half and a proximal half, said power supply adapter additionally comprising:
a strain relief located intermediate the distal half of said case and the proximal half of said case.
a strain relief located intermediate the distal half of said case and the proximal half of said case.
19. A power supply adapter as defined in Claim 16, additionally comprising:
a clip located on said case for removably mounting said power supply adapter onto a device with which said power supply adapter is to be used.
a clip located on said case for removably mounting said power supply adapter onto a device with which said power supply adapter is to be used.
20. A method of making a power supply adapter for plug-in connection to an electrical socket connected to an AC power supply, said method comprising:
supplying an adapter case having first and second opposite ends;
mounting a plurality of conductive prongs in protruding fashion from said first end of said case for plug-in connection to the electrical socket; and installing an AC adapter electrical assembly having a plurality of components within said case in an arrangement disposed generally in-line with said prongs.
supplying an adapter case having first and second opposite ends;
mounting a plurality of conductive prongs in protruding fashion from said first end of said case for plug-in connection to the electrical socket; and installing an AC adapter electrical assembly having a plurality of components within said case in an arrangement disposed generally in-line with said prongs.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63590590A | 1990-12-27 | 1990-12-27 | |
| US635,905 | 1990-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2055079A1 true CA2055079A1 (en) | 1992-06-28 |
Family
ID=24549597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2055079 Abandoned CA2055079A1 (en) | 1990-12-27 | 1991-11-06 | Plug-in power supply adapter |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0493080A3 (en) |
| JP (1) | JP3288415B2 (en) |
| CA (1) | CA2055079A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT401836B (en) * | 1992-09-04 | 1996-12-27 | Egston Eggenburger Syst Elektr | Power supply unit for a small electrical load |
| AT401701B (en) * | 1993-08-18 | 1996-11-25 | Egston Eggenburger Syst Elektr | Power supply unit for a small electrical load |
| SE9401802L (en) * | 1994-05-26 | 1995-11-20 | Vattenfall Ab | Wall socket |
| WO2003094305A1 (en) * | 2002-05-01 | 2003-11-13 | Microlead Technoloy Ltd. | Power supply unit |
| CN100426598C (en) * | 2005-01-12 | 2008-10-15 | 泰尼普拉科技（深圳）有限公司 | New plug-type power supply unit |
| TWI528669B (en) | 2014-02-19 | 2016-04-01 | 勝德國際研發股份有限公司 | Power strip and cord thereof |
| CN112202007B (en) * | 2020-09-25 | 2021-12-14 | 广西电网有限责任公司防城港供电局 | Power strip capable of automatically winding power line |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR902735A (en) * | 1944-03-15 | 1945-09-11 | Voltage transformer socket | |
| FR1347470A (en) * | 1963-02-12 | 1963-12-27 | Suspensive shapes for electrical devices | |
| DE1640717B2 (en) * | 1967-08-22 | 1971-12-02 | Kabel und Metallwerke Gutehoff nungshutte AG, 3000 Hannover | KINK PROTECTION DEVICE FOR ELECTRICAL CABLES ENCLOSURE THE PLUG SOCKET COUPLINGS OR THE LIKE |
| BE722501A (en) * | 1968-03-12 | 1969-04-01 | ||
| US4273406A (en) * | 1978-12-28 | 1981-06-16 | Mitsuoka Electric Mfg. Co., Ltd. | Electrical cord adapter |
-
1991
- 1991-11-06 CA CA 2055079 patent/CA2055079A1/en not_active Abandoned
- 1991-12-23 EP EP19910311968 patent/EP0493080A3/en not_active Ceased
- 1991-12-27 JP JP34629791A patent/JP3288415B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04296476A (en) | 1992-10-20 |
| EP0493080A3 (en) | 1992-10-07 |
| JP3288415B2 (en) | 2002-06-04 |
| EP0493080A2 (en) | 1992-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |