JP4628699B2 - Foot heating element - Google Patents

Description

  The present invention relates to a foot heating element that supplies heat to a foot, and particularly relates to a foot heating element that is preferably used by being attached directly to the skin of a foot or from a sock or a stocking.

  Conventionally, a flat heating element has been formed in a shape corresponding to the tip of the foot, etc., as a heating element for the foot to warm a specific part such as the tip of the foot in cold weather. In addition, a technique for sticking to a sock on the sole side via an adhesive, a technique for holding in a shoe via a non-slip layer, and the like are known (for example, see Patent Document 1).

In addition, as this type of foot heating element, a bulging portion is extended to the toe of a heating element having a foot shape, and the bulging portion is folded back so that not only the sole but also the tip surface of the toe and the upper Techniques for warming are known (see, for example, Patent Document 2 and Patent Document 3).
Utility Model Registration No. 2607414 JP-A-9-276317 JP 2003-334 211 A

  However, since the technique disclosed in Patent Document 1 described above can only warm the foot from the back side, it may not be sufficient to warm the tip of the foot that is particularly easy to cool.

  On the other hand, although the techniques disclosed in Patent Documents 2 and 3 described above can sufficiently warm the foot, the bulging portion is folded back along the toe, so the toe is pressed and worn in the shoe. It was a bad feeling. In addition, this technique is configured to wrap the toes that move most flexibly back and forth in the shoe and frequently bend during walking from the fingertip side, and thus restricts the movement of the toes and hinders walking.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a foot heat body that can realize excellent wearability without disturbing walking and can sufficiently warm a foot. And

The present invention is a position for accommodating a heat agent inside, a pair of flat heat agent accommodating portions disposed facing the back side and the back side of the foot, and a position to avoid the toe of the foot , and The heating agent storage part disposed only along one side surface of the foot part and integrally connected to the thermal agent storage part disposed on the back side and the thermal agent storage part disposed on the back side, And a band-like connecting part having a constricted part for releasing the restraint of the toes, and an adhesive part for adhering at least the connecting part to the foot part.

In that case, it is desirable to integrally form each said thermal-agent storage part and the said connection part with a bag. Moreover, it is desirable to form the front-end | tip shape of each said thermal agent accommodating part in the substantially circular arc shape along a foot tip, and each said thermal agent accommodating part has a fraction part which fractionates an inside into plurality. desirable. Furthermore, the connecting portion is preferably disposed along the side of the foot with thumb side.

  According to the foot warming body of the present invention, excellent wearability can be realized without hindering walking, and the foot can be sufficiently warmed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings relate to an embodiment of the present invention. FIG. 1 is a plan view showing a foot heating element, FIG. 2 is a sectional view taken along the line II in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line II of FIG. 4 showing a modification of the foot heating element, FIG. 5 is a plan view showing a modification of the foot heating element, and FIG. 6 is a plan view showing a modification of the foot heating element. It is.

  In FIGS. 1 and 2, reference numeral 1 indicates a thermal foot for affixed to the tip (foot) of the user's foot. The heating element for foot 1 includes a heating agent 5 for supplying heat to the foot, a pair of flat heating agent storage portions 6 and 7 for storing the heating agent 5 therein, and the heating agent storage portions 6 and 6, respectively. The main part is comprised by the strip-shaped connection part 8 which connects 7 integrally, and the adhesion part 9 for sticking each thermal-agent storage part 6,7 and the connection part 8 to a leg | foot.

  The heating agent 5 applied to the foot warming body 1 is not particularly limited, but preferably a heating agent that generates heat by an oxidation reaction, such as iron powder used in a disposable simple body warmer. Can be used. Such a heat generating agent is not particularly limited as long as it easily reacts with oxygen in the air and generates heat during the reaction. Preferred examples include reduced iron powder, atomized iron powder, and the like. Examples include iron powder. The exothermic agent can be mixed with an exothermic auxiliary agent that promotes exotherm used in ordinary simple warmers, and it is preferable to add an electrolyte solution and a water retention material as the exothermic auxiliary agent. Activated carbon is preferably used as the water retention material, and examples of the activated carbon material include coconut shell activated carbon, charcoal, coal, calendar bituminous coal, peat, and coke charcoal. In addition, water retaining materials such as silica, vermiculite, water-absorbing polymer, and wood powder may be added. Examples include polyalkylene oxide, water-soluble cellulose ether, poly-N-vinylacetamide, hydroxyethyl cellulose, methyl cellulose, sodium alginate, pectin, acrylic sulfonic acid polymer, gelatin, polyethylene oxycide, carboxymethyl cellulose and the like. Examples of the electrolyte solution include aqueous solutions of sodium chloride, potassium chloride, calcium chloride, magnesium chloride and the like.

  In addition, as the heat agent 5, instead of the above-described heating element, for example, as shown in FIG. 4, a gel-like heat storage agent can be used. Such a heat storage agent is not particularly limited, and for example, polyvinyl alcohol, carboxymethylcellulose, polyacrylamide, sodium polyacrylate, carboxyvinyl polymer and the like are preferably used. The heat storage agent is usually used as a heating tool in the form of a heat storage pack (heat insulating body) enclosed in a bag body made of a synthetic resin film or the like. This warming tool is used by heating to an appropriate temperature in a microwave oven, for example.

  As shown in FIG. 1, the thermal agent accommodating portions 6 and 7 are configured by members that are symmetrical to each other, and the tip ends thereof are formed in a substantially arc shape along the shape of the foot. Heating agent storage parts 6 and 7 are arranged so as to face each other so that the foot part is sandwiched up and down during use. Specifically, one is arranged on the back side of the foot part and the other is on the back side. It is arranged.

  Moreover, the connection part 8 is comprised with the strip | belt-shaped member which can be bent along the side surface of a leg part. For example, when the connecting part 8 is disposed along the side surface of the foot near the base of the thumb, the length of the connecting part 8 between the heat storing parts 6 and 7 is determined. The length is set such that it can be arranged at suitable positions on the back side and back side of the foot. Specifically, the length of the connecting portion 8 is set on the basis of the thickness of the average foot on the thumb side, and is set within a range of about 30 mm to 45 mm, for example.

  Further, a constricted portion 8 a for releasing the restriction of the thumb (toe) by the connecting portion 8 is formed on the distal end side of the connecting portion 8. That is, the constricted portion 8a recessed at the distal end side of the connecting portion 8 prevents the toes from being covered with the connecting portion 8 and ensures free movement of the toes.

  In this embodiment, each of the thermal agent storage parts 6 and 7 and the connection part 8 are integrally formed by a flat bag body 10. More specifically, the bag body 10 has a pair of sheet bodies 11 and 12 cut into a predetermined shape including the outer shape of each of the thermal agent storage portions 6 and 7, respectively. The edges are attached to each other to form the accommodating portion. Further, the sheet bodies 11 and 12 are attached to each other at the central portion of the bag body 10, whereby the inside of the bag body 10 is fractionated and formed into a pair of thermal agent containing portions 6 and 7, The part is formed as a band-like connecting part 8 that connects the thermal agent accommodating parts 6, 7.

  One sheet body 11 constituting the bag body 10 is constituted by, for example, a breathable sheet body formed by laminating a nylon nonwoven fabric and porous polyethylene. Further, the other sheet body 12 is made of, for example, nylon as the outermost layer, a polyethylene film laminated on the inside thereof, and further made of linear low density polyethylene (L / LDPE) having a good heat-fusibility inside. It is comprised by the sheet | seat body formed by laminating | stacking a film. Furthermore, the adhesive part 9 which apply | coated the adhesive is provided in the surface of the nylon layer of the sheet | seat body 12. As shown in FIG. Moreover, in order to prevent the adhesive from being soiled before use, the adhesive portion 9 is covered with a release paper (not shown).

  Here, each sheet | seat body 11 and 12 is not limited to the above-mentioned thing, For example, a breathable film, paper, a nonwoven fabric, a woven fabric etc. can be comprised. The breathable film is not particularly limited as long as it can be formed into a film and can exhibit breathability by a method such as stretching and / or extraction of a soluble filler or perforation with an ultrafine needle. Specific examples include polyethylene, polypropylene, cellophane, polyester, polyamide, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyurethane, polystyrene, ethylene vinyl acetate copolymer, polycarbonate, hydrochloric acid rubber, and the like. Of these, those made of polyolefin resin are preferable because a homogeneous air-permeable film can be obtained by stretching or the like. Examples of the polyolefin-based resin include homopolymers such as polyethylene, polypropylene, and polybutadiene, copolymers, and blend polymers thereof. In particular, polypropylene (PP), high-density polyethylene (HDPE), and linear low-density polyethylene ( LLDPE) is preferred from the above viewpoint. Such a breathable film and at least one of paper, non-woven fabric, and woven fabric can be used. When a heating agent that generates heat by an oxidation reaction is used as a thermal agent, the nonwoven fabric and a synthetic resin imparted with breathability are used. It is preferable that a bag body is comprised by the sheet | seat body formed by laminating | stacking a film.

  The adhesive portion 9 may be provided on the entire surface of one surface of the bag body 10 or on a part thereof as long as it is provided on at least the connecting portion 8 on one surface of the bag body 10 (surface of the sheet body 12). . The pressure-sensitive adhesive used for the foot warming body of the present invention is not particularly limited as long as it has good adhesion to skin and underwear. Specifically, for example, vinyl adhesive, vinyl acetate adhesive, polyvinyl acetal adhesive, vinyl chloride adhesive, cellulose adhesive, chloroprene (neoprene) adhesive, acrylic adhesive, nitrile rubber And a layer formed of an adhesive such as a styrene-based adhesive, a styrene rubber-based adhesive, a silicone rubber-based adhesive, a polysulfide-based adhesive, a terpene resin, or a water-soluble rosin.

  Note that when the heating element for feet 1 uses a heat generating agent that generates heat due to an oxidation reaction as the heat generating agent 5, an oxygen-blocking bag (not shown) is provided so that the heat generating agent does not come into contact with oxygen. Is housed in. When the oxygen-blocking bag is opened during use, the exothermic agent immediately begins to oxidize and begins to generate heat. Materials that make up the oxygen barrier bag include polyvinylidene chloride, polyamide, nylon, metal vapor deposition film, metal oxide vapor deposition film, metal stay laminate film, EVOH (ethylene / vinyl alcohol copolymer, ethylene / acetic acid) A vinyl copolymer saponified product) film or a composite film or a multilayer film obtained by bonding a film bonded to another film and a heat-fusible film such as polyethylene or polypropylene can be used. These films are overlapped so that the surfaces of the heat-fusible film are inside each other, and heat-fused with the periphery to be formed into a bag.

  At the time of use, for example, as shown in FIG. 3, the foot heating element 1 has a connecting portion 8 attached along the side of the foot near the base of the thumb. 6 and 7 are attached to the sole and back of the foot, respectively. At that time, as shown in the drawing, it is preferable that each of the thermal agent storage portions 6 and 7 is disposed on the inner side of the foot tip (slightly behind the foot tip). In addition, although the example of illustration shows about an example in the case of sticking the foot | leg warming body 1 to a foot | leg via socks, you may stick | paste directly to the skin of a foot | leg, via stockings etc. You may stick. Moreover, you may stick the connection part 8 along the foot part of a foot | leg on the base side of a little finger.

  According to such a form, a pair of thermal-agent storage parts 6 and 7 arrange | positioned at the instep side and the back side, respectively, are provided via the strip | belt-shaped connection part 8 arrange | positioned along the side surface of a leg. With the structure of connecting together, the connecting portion 8 can be avoided from the toe to ensure the freedom of toe movement, the feeling of pressure due to the use of the foot heating element 1 is reduced, and good walking performance is realized. be able to.

  Moreover, since the connection part 8 is strip | belt-shaped (namely, since it is the structure which does not accommodate the thermal agent 5), it can stick with followable | trackability along the side of a leg | foot.

  Further, by attaching the connecting portion 8 to the side of the foot, the foot heating element 1 can be attached and held on the foot portion where the back-and-forth motion and the bending motion are slow, and the connecting portion 8 is peeled off from the foot. Can be accurately prevented and excellent wearability can be realized.

  Further, by forming the constricted portion 8a on the distal end side of the connecting portion 8, the toes can be released from the restraint of the connecting portion 8, and better walking performance can be realized.

  In addition, the structure can be simplified by integrally forming each of the thermal agent storage portions 6, 7 and the connecting portion 8 using a single bag body 10.

  Moreover, the discomfort at the time of mounting | wearing with the heating element 1 for legs can be reduced more effectively by forming the front end side of each thermal-agent storage part 6 and 7 in the substantially circular arc shape along a foot tip.

  Further, by making the thermal agent storage portions 6 and 7 symmetrical to each other, the foot heating element 1 having the same shape can be used on either the left or right side.

  Here, for example, as shown in FIG. 5, the foot heating element 1 described above may be configured using the heat agent storage portions 6 and 7 having an asymmetric shape. Note that the foot heating element 1 shown in FIG. 5 is for the left foot, and the heating agent storage portion 7 disposed on the back side of the foot is relatively more than the heating agent storage portion 6 disposed on the back side. It is composed largely.

  Further, for example, as shown in FIG. 6, it is possible to fractionate the interior of each of the thermal agent storage units 6, 7 into a plurality by the fractionation unit 15. As described above, by dividing the inside of each of the thermal agent accommodating portions 6 and 7, it is possible to accurately prevent the bias of the thermal agent 5 in each of the thermal agent accommodating portions 6 and 7. In this case, each fractionation part 15 can be easily formed by sticking the sheet bodies 11 and 12 to each other in place as in the connection part 8.

Plan view showing thermal body for feet II sectional view of FIG. The perspective view which shows the example of mounting | wearing to the foot | foot part of the thermal body for legs II sectional drawing which shows the modification of a thermal body for legs The top view which shows the modification of the thermal body for legs The top view which shows the modification of the thermal body for legs

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Thermal body for legs, 5 ... Thermal agent, 6 ... Thermal agent accommodating part, 7 ... Thermal agent accommodating part, 8 ... Connection part, 8a ... Constriction part, 9 ... Adhesive part, 10 ... Bag body, 11 ... Sheet body , 12 ... Sheet body, 15 ... Fractionation part
Agent Patent Attorney Susumu Ito

Claims (5)

A pair of flat thermal agent storage portions that contain the thermal agent inside and are disposed to face the back side and the back side of the foot,
The thermal agent containing portion disposed on the back side and the thermal agent containing portion disposed on the back side, which is disposed only along one side surface of the foot portion and is located at a position avoiding the toe of the foot portion. And a belt-like connecting part having a constricted part for releasing the restraint of the toes on the tip side,
A foot heating element, comprising: an adhesive portion that attaches at least the connecting portion to the foot portion.   The foot heat body according to claim 1, wherein each of the heat agent storage portions and the connection portion are integrally formed of a bag.   The foot heating element according to claim 1 or 2, wherein the tip shape of each of the thermal agent accommodating portions is formed in a substantially arc shape along the foot tip.   The foot thermal body according to any one of claims 1 to 3, wherein each of the thermal agent containing portions has a fractionation portion for fractionating the interior into a plurality of portions.   The foot heating element according to any one of claims 1 to 4, wherein the connecting portion is disposed along a side surface of the foot portion on the thumb side.

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