JPS5858043A - Warming pad - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating pad that is attached to affected areas of the human body, such as the waist, shoulders, arms, etc., to perform thermal treatment.

Generally, when a heating pad is in use, moisture such as sweat often enters the heating element, so it is necessary to encapsulate and waterproof the heating element, especially around the power hood that extends from the heating element. It is important to completely seal the power cord, and conventionally, as shown in Figures 1 and 2, the heating element was covered with a waterproof bag 5, and the periphery of the outlet of the power cord 6 was sealed by high frequency welding. .

However, with this method, it is necessary to increase the welding area as shown by diagonal lines in FIG. There is a problem that the welding of the bag 5 cannot be done reliably and the welded part comes off and moisture intrudes. Furthermore, if the pressure during welding is increased to increase the welding force, the insulation performance of the core wire of the power cord 6 deteriorates. The present invention was created in view of the above problems, and its purpose is to provide a thermal hood with improved waterproof performance by reliably welding and sealing the drawer part of the power hood. It's about doing.

Embodiments of the present invention will be described below based on the drawings.

A heater element 2 formed in a zigzag shape is housed in a fixed sheet 1 made of two synthetic resin sheets Y, and the heater element 2
A sheet heating element 8 is constructed by welding synthetic resin sheets between adjacent linear parts, and a heat insulating sheet 4 is placed on one side of the sheet heating element 3.
After stacking the sheets and storing them in a waterproof bag 5 made of synthetic resin sheets such as vinyl chloride, the opening of the waterproof bag 5 is welded and sealed to prevent hot air from entering the planar heating element 8. There is.

A power supply hood 6 for supplying power to the heater element 2 is attached to the end of the planar heating element 8, and the power supply hood 6 is attached to a waterproof bag 5.
The outer periphery of the power cord 6 extending outside from a cord take-out lower portion formed on one end surface is integrally formed with a bushing 9 having seven flange 8 in the form of a sheet made of synthetic resin. It is welded to the periphery of the hood removal lower part of the waterproof bag 5. When welding, as shown in Figure 6, a plurality of protrusions 10 are formed to prevent the welded part from elongating due to heat and pressure during welding. Furthermore, by making the protrusion 10 substantially parallel to the longitudinal direction of the end surface of the waterproof bag 5, it is easy to bend in the lateral direction, and the thickness of the waterproof bag 5 at the welded part is not increased.Furthermore, the power cord 6 and bushing 9
In order to improve the waterproof performance between the parts, the shaded areas in Figure 6 are welded under pressure.

When using the heating pad, it is stored in the cloth bag 11 shown in FIG. It is fixed and used.

As described above, the present invention stores a planar heating element to which a power cord for supplying power to a heater element is attached in a waterproof bag formed of a synthetic resin sheet, forms a hood outlet in the waterproof bag, and connects the power cord to the heater element. The power supply hood is extended to the outside from the outlet, and a bushing having seven sheet-shaped lunges made of synthetic resin is integrally formed on the outer periphery of the power supply hood, and the seven lunges and the periphery of the cord outlet of the waterproof bag are welded. Since the welding part is welded between sheets, the welding is done reliably and waterproof performance is improved, and unlike the conventional example, the welding is not welded to the power cord itself, so there is no risk of deterioration of the insulation performance of the core wire.

[Brief explanation of the drawing]

Figure 1 is a plan view of the main parts of the conventional example, and Figure 2 is A-A in Figure 1.
8 is a perspective view of an embodiment of the present invention, FIG. 4 is an exploded perspective view of the same as above, FIG. 5 is an enlarged perspective view of essential parts of the same as above, and FIG. 6 is a BB sectional view of FIG. , FIG. 7 is a perspective view of the cloth bag. 2. Heater element, 8. Planar heating element, 5. Waterproof bag,
6. Power cord, 7. Hood outlet, 8. Flange, 9. Bushing, 10. Projection. Patent applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Toshimaru Takemoto (and 2 others) Figure 1 Figure 113 (Flute 4W!J Figure 6 [Figure 17)

Claims (1)

[Scope of Claims] 1) A planar heating element to which a power supply hood for supplying power to a heater element is attached is housed in a waterproof bag made of a synthetic resin sheet, and a hood outlet is formed in the waterproof bag; The power supply hood is extended to the outside from the hood outlet, and a bushing having seven sheet-shaped lunges made of synthetic resin is integrally formed on the outer periphery of the power supply hood, and the seven lunges and the periphery of the cord outlet of the waterproof bag are connected. Thermal heat generated by welding. 2) The heating nosed according to claim 1, wherein a protrusion is formed at the welded portion of the 7-lunge and the waterproof bag. 3), the power supply hood extends from one end of the waterproof bag,
The heating pad according to claim 2, wherein the protrusions are formed substantially parallel to the longitudinal direction of one end surface of the waterproof bag.