澳大利亚专利AU2012362389A1 Heated insoles

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专利摘要:
An efficient system to heat the insole of a heated insole of a shoe in which the Intelligent Circuit (IC) for a flat lithium battery is located outside the shoe and the placement of the heater for the insole is between more efficient heat insulation and heat conducting members.
公开号:AU2012362389A1
申请号:U2012362389
申请日:2012-12-27
公开日:2014-07-17
发明作者:James K. Lynch；Stephen J. Shapiro；Ian Whitehead
申请人:Schawbel Corp；
IPC主号:A43B3-00

专利说明:
WO 2013/101920 PCT/US2012/071797 1 NON-PROVISIONAL PATENT APPLICATION TITLE: HEATED INSOLES Inventors: Stephen J. Shapiro, James K. Lynch, and Ian N. Whitehead RELATED APPLICATIONS This application is based upon two US Provisional Patent Applications, Serial Numbers 61/581,782, filed December 30, 2011 and 61/594,043, filed February 2, 2012, the priority of which are claimed and the contents of which are incorporated herein. DESCRIPTION AND BACKGROUND OF THE INVENTION This invention relates to improvements for heated insoles for shoe wear, especially for hiking, cycling and skiing and even for ordinary shoes if the wearer has cold feet. Over the years, various systems have been designed and employed to provide additional heat inside shoes when they are used in outdoor environments. An example of such a prior art system is shown in US Patent Publication US2009/0013554, which is directed to a wireless system in which signals are transmitted to control a heater in the insole. For some time, there have been fixed hardwired systems such as shown in US Patent #4,665,301 in which heaters are plugged into a wall socket to provide heat to the insole which is used during the day. It may be recharged through a suitable recharging system to reheat the heated insole to provide sufficient warmth to the user. These systems generally have an electric heater placed on the bottom of the insole with various nonconductive foam materials therein. Current designs, while WO 2013/101920 PCT/US2012/071797 2 conventional, are limited in that a good portion of the heat is not provided to the upper portion of the sole, which is in closer contact with the foot of the wearer. Lithium ion batteries which are flat have been incorporated as the batteries to provide power for the insole, and opposed to having battery power outside the boot as was previously provided for heating the insole. Lithium ion battery chargers are generally formed of two sections: * A power supply that converts line AC into low voltage DC; and * An intelligent circuit (IC) that receives the low voltage DC, monitors the battery charge state, and delivers suitable current and voltage to fully and safely charge the batteries for heating the heating pad and the insole. Heretofore insoles with built in lithium ion batteries have the charger power supply as a wall mounted device and the intelligent charging circuit located inside the insole. This arrangement subjects the charging components to the heat and mechanical stress of use when the footwear is worn. Any failure of a charging component renders the entire product useless. An object of this invention is to provide an improved heating system for insoles for shoes. Another object of this invention is to more efficiently provide heat to the wearer during normal usage. Another object of this invention is to provide an improved lithium battery system in which the intelligent circuit component is located outside the shoe. Yet another object of this invention is to provide a more efficient, economical system for heating insoles.
WO 2013/101920 PCT/US2012/071797 3 Another object of this invention is to more efficiently locate the heater within an insole to more directly provide heat to the foot of the wearer. Yet another object of this invention is to provide a more efficient and economical battery charging system more susceptible of widespread use. Other objects, advantages and features of this invention will become more apparent from the following description. In accordance with the principles of this invention, the above objects are accomplished by separating the intelligent circuit (IC) which charges the rechargeable lithium batteries from the lithium ion batteries itself. This may be accomplished by locating the IC charging circuit within the AD/DC plug adapter assembly or having the IC charging circuit assembly as a module closely located and connected to the AC/DC converter. Since the IC is a relatively expensive part of the lithium battery assembly, removing it from the physical wear and tear conventionally encountered and integrally formed with the battery to be charged enables a costly component to prolong its life, reduce the possibility of failure and ensure that only the lithium battery is replaced when necessary without the need to replace the entirety of the Intelligent Circuit (IC) lithium battery combination. Further, the above objects are accomplished by additionally relocating the heater within the insole from the substantially bottom most location furthest from the foot of the user to a location closer to the foot of the user so as to provide more efficient heat directed to the user, thereby reducing power drain and more efficiently and quickly heating the area. Prior art insoles have an EVA foam layer of about 5mm thickness WO 2013/101920 PCT/US2012/071797 4 located above the heater. The new structure compresses the EVA foam to no more than 2 or 3 mm, then adds an additional conductive layer above the battery and an additional insulating layer between the foot and bottom of the shoe to improve heat conductivity to the foot of the wearer. These improvements are described below in greater detail with reference to the following drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. l is a block diagram of the intelligent circuit (IC) elements located outside of the lithium battery located within the sole. Fig. 2 is a schematic diagram of the IC elements used to charge the lithium batteries as shown in Fig. 1. Fig. 3 is a sectional view through the insole of a shoe showing prior art. Fig. 4 is another sectional view similar to Fig. 3 but showing the heater more efficiently located to heat the sole of the user. Fig. 5 is also a sectional view of the insole similar to Fig. 4 showing an additional embodiment. Fig. 6 is a perspective view of another embodiment of the insole structure similar to Fig. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Fig. I is a block diagram of this invention with the AC to DC converter merely indicated as DC in block 10. Such AC to DC converter is plugged into a 120 volt wall WO 2013/101920 PCT/US2012/071797 S socket or any other suitable AC wall socket to provide a DC output. The output of the DC converter 10 is supplied to charger intelligent circuits (IC) 12 and 14 which include the ability to receive the low DC voltage produced by converter 10, monitor the battery charge state and deliver suitable current and voltage to fully and safely charge the batteries. A charge LED driver 16 is provided to light an LED 18 as the batteries are being charged. The output of the charger intelligent circuits 12 and 14 are supplied to batteries 20 and 22 respectively, which are separately located within the insole. Batteries 20 and 22 are located within the insoles, and two batteries are provided for the pair of insoles for the pair of shoes. Cables or conductors 24 and 26, respectively, are provided as outputs of the IC circuits terminating in standard plugs for receptacles contained within the shoes to be heated. The IC circuits 12 and 14, LED driver 16 and LED 18 may all be contained within a single housing directly connected to the AC to DC converter 10 or integrally formed within AC to DC converter 10. Fig. 2 is a more detailed schematic diagram showing electronic components of the block circuit shown in Fig. 1. DC input power is provided at AC/DC converter and is shown in Fig. 2 as the sign +, which is typically +5V. Power passes by capacitors 28 and 30 to assure that the power is clean and free from any transient voltage spikes. Torex components 32 and 34 are integrated Li-ion battery charging IC's. One such IC is Torex XC68OIA4PR-G. The purpose of these devices is to monitor the state of the insole batteries located off the PCB and in the heated insole itself. Both IC's 32 and 34 are smart devices that look at the charging characteristics of each battery and adjust their output voltage to match a WO 2013/101920 PCT/US2012/071797 6 current profile matched to the battery chemistry and capacity of the battery. This output is pin 36 of IC's 32 and 34, respectively. Battery status is displayed to the user via pin 38 of IC's 32 and 34, and this pin is an open collector type output and is pulled low during the charge state. Power is supplied through resistor 31 to pin 38. A low level while charging then turns on the P channel FET Q1-B designated as numeral 40 which in turn, turns on the next P channel FETQI-A designated 42. A low level on Q1-A 42 allows current to flow out from the cathode of LED 44 which illuminates the LED and receives its power through resistor 46. Both IC's 32 and 34 share this connection to Q1-B 40 as it is important that either charger device 32 or 34 be able to activate the charging LED indicator as either battery may need charging or perhaps only one does. Once both devices determine each battery is fully charged, they present a high level on their output pin 36 which is then pulled to +Power via resistor 46. A high level on this node then deactivates Q1-B, 40, then Q1-A, 42 such that the current from LED 44 is disrupted, and the LED is extinguished. An extinguished LED signifies charging on both insole batteries is complete. Components 48, 50 and 52 form an RC time constant such that small pulses that may occur on the outputs of IC's 32 and 34 during charging are ignored and only a DC state will signify a change of LED state. Capacitors 54 and 56 are DC storage capacitors such that when the charger is not connected to the batteries, the capacitors will be charged via IC's 32 and 34 to the point in which both IC's 32 and 34 think a battery is present and it is fully charged, thus WO 2013/101920 PCT/US2012/071797 7 turning off the LED when no battery is connected to the system. This is done since it is desirable for the LED to be in the "off' state when no batteries are connected, in the "on" state when batteries are connected and charging and again in the "off" state when the batteries are fully charged. Fig. 3 is a sectional view of a prior art insole 60 having a black non-woven bottom layer 62 and an insulating foam layer 72 on which sits a PCB board 63. The PCB board controls heater 68. Prior art IC 64 circuit controls charging battery 20 which, in conjunction with the PCB board circuit 63 controls heater 68 through conductors 70 to heat the insole. The use of a PCB circuit to control the heater 68 is described in US Patent 8,074,373 to Macher, et al., the contents of which are incorporated herein. While the prior art Fig. 3 is a combined lithium and intelligent circuit (IC) integrated single unit 66 (20 and 64), it is understood that the battery 20 contained within the insole may be separated from the IC circuit 64. The electrical conductors 24 and 26 between the IC circuits and the sockets in the footwear will carry signals to charge the battery 66 and thereby control heater 68 in conjunction with PCB board 63. The combination of an improved locational assembly for the heater pad within the insole further enhances the general heating capabilities of the present invention and overall efficiency when utilized with the separate IC circuits outside the shoe as shown in Figs. I and 2 above. The prior art construction in Fig. 3 also has an EVA foam insole member 72 which sits on top of the previously described sole structure so that heat generally emanates upwardly through the foam 72 from heater 68 to the bottom of the sole of the foot (not shown) which rests on top of the EVA foam member 72. The prior art structure WO 2013/101920 PCT/US2012/071797 8 foam material is about 5 mm in thickness compressed only a small amount so that about 5 mm is the depth of the layer 72 when the shoe is worn. A first embodiment of an improvement over the prior art is shown in Fig. 4 which enables the heater 68 to be located closer to the sole of the foot which rests on top of foam 72. In this embodiment, a recess 74 is formed EVA foam 72 above heater 68 to minimize the foam just under the sole in the region of the heater 68. The foam 72 is compressed to 2-3 mm and preferably 2 mm. Compressing EVA foam to no more than 3 mm makes it more dense, and it is more thermally conductive than the prior art thereby carrying heat from heater 68 to the foot. Additionally a separate insulation member 76 approximately the size of heater 68 is added between the surface 62 and the heater 68 to ensure heat is directed upwardly. This additional insulation member is able to be added because of the space saved by compressing foam layer 72 to 2-3 mm. Thus, the thickness of foam 72 between the heater 68 and sole of the foot is materially reduced, while insulation 76 below foam 72 reduces the amount of heat lost downwardly from heater 68. Fig. 5 is another embodiment of the heater pad insole structure which may be provided separately or in conjunction with the embodiment of Fig. 4. An additional layer of insulation 78 is provided on top of the bottom black non-woven layer 62 and below heater 68 to further prevent heat from the heater 68 escaping downwardly to the bottom of the insole. Space is provided for layer 78 which extends substantially the length of the shoe because of the reduced thickness of foam layer 72. In this regard, by further preventing heat from escaping, more heat is directed upwardly toward the foot so as to provide a more efficient insole heating system.
WO 2013/101920 PCT/US2012/071797 9 Fig. 6 is a perspective view of yet another embodiment of a system to deliver more heat to the foot in a heated insole. The prior art single EVA foam pad 72 is modified to be formed in two sections, a front section 80 and a rear section 82. Sections 80 and 82 are integral and have a hole or recess 84 located between front and rear sections. A conductive pad 86 fits in the hole 84. Pad 86 is a thermally conductive rubber or rubber like material. It is 1 or 2 mm thick. The heater 68 sits in hole 84 and is under pad 86. A bottom insulation base layer 78 (as in Fig. 5) has heater 68 placed on top of the base layer 78 in the recess 84. Conductive pad material 86 is located on top of heater 68 so that heat from the heater is directly carried to the sole of the foot, and heat loss escaping downwardly from heater 68 is prevented by insulation layer 78. This structure allows more heat to be directed upwardly toward the bottom of the sole in a more efficient manner thereby reducing power drain of battery 66. Foam 72 includes a small section labeled 72a in Fig. 6. A preferred embodiment of this invention locates the heater 68 within 2 mm of the foot side of the insole. A more consumer friendly product may be provided by having a turbo mode which provides an initial burst of high heat when the heater 68 is initially turned on. Further, the turbo mode may be repeatedly activated either manually by the user or automatically within the system. When a remote system is employed to control the heater 68, the remote transmitter, when activated, may initiate the turbo mode for the system.
WO 2013/101920 PCT/US2012/071797 10 As a further improvement, the electrical system on the PCB board may also include cycling the heat controls between high and low heat to more efficiently utilize energy and maximize comfort for the user. With regard to improving the thermal conductivity of the foam EVA layer, one might compress the foam to make it more dense to improve thermal conductivity or use a solid plastic instead of foam to both provide insulation and thermal conductivity so that heat is more efficiently directed to the bottom of the foot of the wearer. This invention has been described with regard to improving the overall efficiency, safety and economics of providing a heated insole for primarily outdoor shoe wear. One aspect of the invention is to improve the delivery of heat to the foot of the wearer so as to lessen wasted heat and more efficiently utilize the heating pads' output. This reduces power consumption and generally improves the life of the heating unit and battery run times. In addition, an important aspect of the present invention is minimizing waste by separating the intelligent circuit from the lithium battery, which is different from that of the prior art in which such elements are combined as a single unit within the insole. By separating the IC circuit from the battery, significant improvements are obtained for the system. IC charging functions, other than simply making the electrical connection to the batteries, are carried out outside of the insoles. The electronic components that have the intelligence to determine the state of charge of the batteries and respond with the correct voltage and current to fully and quickly charge them are located in the power WO 2013/101920 PCT/US2012/071797 11 supply that plugs into the wall receptacle or in the cables between the power supply and the batteries. The advantages of such system are: * Removing the charging components from the insole where they are subjected to heat buildup and the repeated mechanical stress of walking means chargers will last longer. * Charger circuit failures can be remedied by replacing the charger alone, not the entire product. * Fewer electronic components within the insole structure man that the insoles will last longer. 0 Easier to upgrade, faster, longer lasting charge, etc. which can be implemented by changing the charger. Previously, the entire product including two insoles and charger power supply required upgrading. * Improved energy efficiency: one LED indicated charging status and this LED is off when the insoles are not charging. - Larger charger PCB area allows for better ESD (electrostatic discharge) protection and isolation. * External chargers may be modified for various AC and DC input voltages for greater worldwide usage. It should be understood that the preferred embodiment was described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the art to utilize the invention in various WO 2013/101920 PCT/US2012/071797 12 embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly legally and equitably entitled.

权利要求:
Claims (17)
[1] 1. A charging system for a flat battery carried in an insole to heat the insole of a shoe, said charging system comprising: an intelligent circuit located outside the insole to control charging said battery by monitoring the battery state of charge and provide current and voltage to charge said battery; said intelligent circuit having an input to receive a DC input voltage; said intelligent circuit comprising output electrical conductors to carry charging voltage and current to said battery; said battery located within said insole; and electrical sockets in said shoe connected to said conductors and to said battery to carry said charging voltage and current to said battery.
[2] 2. A charging system according to claim 1, wherein said conductors carry monitoring information from said battery to said intelligent circuit.
[3] 3. A charging system according to claim 1, wherein said DC input voltage is generated by an AC to DC converter, said intelligent circuit formed as an assembly which is integral with said AC/DC converter.
[4] 4. A charging system according to claim 1, wherein said module comprises two electrical conductors, one for each shoe of a pair of shoes.
[5] 5. A charging system according to claim 1, wherein said charging system comprises an LED to indicate when said battery needs charging. WO 2013/101920 PCT/US2012/071797 14
[6] 6. A charging system according to claim 1, wherein said LED indicates when either battery of a pair of shoes needs charging.
[7] 7. A charging system according to claim 1, wherein said battery is connected to a heater to provide said heat, wherein said insole comprises a foam layer between said battery and the foot of a wearer of said shoe.
[8] 8. A charging system according to claim 7, wherein said foam layer between said heater and sole of said foot is approximately two mm in depth when said foam is compressed.
[9] 9. A charging system according to claim 7, wherein said foam layer between said heater and sole of said foot is approximately three mm in depth when said foam is compressed.
[10] 10. A charging system according to claim 7, wherein said insole comprises an insulating layer located below said foam layer.
[11] 11. A charging system according to claim 7, wherein said foam layer has a front and rear section separated by a gap, and a heat conductive layer located in said gap, said heater located below said heat conductive layer.
[12] 12. A charging system according to claim 11, further comprising an insulating layer located below said heater extending the length of said front and rear sections.
[13] 13. An insole assembly for a heated insole for shoes in which said insole contains a heater, a battery connected to said heater wherein said battery is connected to said heater through a control circuit to control the heating of said WO 2013/101920 PCT/US2012/071797 1s heat pad, said insole assembly comprising a separate insulating member located between said heater and the insole of said shoe.
[14] 14. An insole assembly according to claim 13, wherein said insole comprises a foam member located below the foot of a wearer, said foam member comprising a hole to accept a thermally conductive top layer, said heater located thereunder and an insulating bottom layer located under said heater.
[15] 15. An insole assembly according to claim 14, further comprising an insulating layer located below said heater.
[16] 16. An insole assembly according to claim 14, wherein said foam member is compressed to no more than approximately 2 mm thickness.
[17] 17,An insole assembly according to claim 14, wherein said foam member is compressed to no more than approximately 3 mm thickness.

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法律状态:
2015-01-15| DA3| Amendments made section 104|Free format text: THE NATURE OF THE AMENDMENT IS: AMEND THE PRIORITY DETAILS TO READ 61/594,043 02 FEB 2012 US AND 61/581,782 30 DEC 2011 US |

2015-01-15| PC1| Assignment before grant (sect. 113)|Owner name: SCHAWBEL TECHNOLOGIES LLC Free format text: FORMER APPLICANT(S): THE SCHAWBEL CORPORATION |

2016-12-22| DA2| Applications for amendment section 104|Free format text: THE NATURE OF THE AMENDMENT IS AS SHOWN IN THE STATEMENT(S) FILED 15 NOV 2016 |

2017-03-16| DA3| Amendments made section 104|Free format text: THE NATURE OF THE AMENDMENT IS AS SHOWN IN THE STATEMENT(S) FILED 15 NOV 2016 |

2017-03-23| FGA| Letters patent sealed or granted (standard patent)|

优先权:

申请号 | 申请日 | 专利标题

US201161581782P| true| 2011-12-30|2011-12-30||

US61/581,782||2011-12-30||

US201261594043P| true| 2012-02-02|2012-02-02||

US61/594,043||2012-02-02||

PCT/US2012/071797|WO2013101920A1|2011-12-30|2012-12-27|Heated insoles|

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