1. Field of the Invention
The present invention relates to an electric thermal waist belt, which particularly relates to waist belt performing a stable heat at temperature intervals between 35˜60° C. on the surface of the waist belt for health.
2. Description of the Related Art
The normal waist belts in the prior arts commonly comprise a set of heating wire covered in the belt, and the waist belt can perform as a hot compress for health when heating wire is connected to a power supply. The structure of prior arts is too poor to stable the temperature of the waist belt, and some area on the surface may overheat and some area may be cold. Overheating may cause heat damage to skin even worse to a burn.
Some improvements in the prior arts utilize polyurethane (PU) foam to cover the heating wire to prevent overheating. The direct contact of the heating wire partially deteriorates the PU foam along the heating wire, and soon the whole waist belt will be unusable.
The present invention relates to a healthy waist belt with electric heat, which is easy operation, safe, and temperature stable between 35˜60° C. on the surface as a proper hot compress for health. The electric thermal waist belt of the present invention comprises a plurality of belt sheaths made of polyvinyl chloride (PVC) in a thickness of 0.3±0.05 mm, at least two lining pads made of flameproof polyurethane (PU) foam in a thickness of 3˜8 mm and a density of 18 kg/m3 and covered by the belt sheaths, a fastener, a power switch, and an electrothermal layer.
The fastener is set at two ends of the belt sheath for fix around waist. The outside lining pad comprising a foil adhered, which faces the electrothermal layer, and the power switch is connected to the heating wire to operate.
The electrothermal layer is placed in between two lining pads and comprises a circuit of heating wire and at least two multi-apertured surfaces that the circuit of heating wire is placed in between. The circuit of heating wire further comprises a thermostat and connects to the power switch to be operated, and the thermostat set heating under 85° C. to stabilize the temperature to prevent overheating burn. The circruit of the heating wire is laid along holes of the multi-apertured surfaces of the electrothermal layer. The holes help radiation of the heating wire so that it can save energy, and the foil of the lining pad reflects and equalizes the heat to prevent a hot spot on the surface of the belt sheath.
The power switch comprises a power regulator, a power cord, and a power indicator light, and connects to the power supply and to the circuit of heating wire to regulate power output to set the waist belt at a proper temperature.
The waist belt further comprises two side pads that is made of PU foam in a thickness of 2˜6 mm. The side pads are set at the ends of the inner lining pad and provide a special buffer of heat for waist.
The belt sheaths are sewed to cover the lining pads comprising the electrothermal layer to complete the electric thermal waist belt. With plugging the power cord into the outlet and the power regulator controlling in 10˜50 watt power output, the electric thermal waist belt provides a hot compress in a stable and proper heat which is about 35˜60° C. on the surface of the belt sheath around the waist.
In the following description of the embodiments of the present invention, please refer to the drawings.
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The foregoing describing of the preferred embodiment of the invention is for the purpose of illustration and description. It is not intended to exhaustive or to limit the invention to the precise from disclosed. Many other possible modifications and variations can be made without departing from the scope of the present invention, which following claims are depended.