JP2012075740A - Insole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shoe insole having a compact size, having a flat heat generating element easy to replace and repair, and excellent in practical utility and fit.SOLUTION: The insole includes: an insole body 2 disposed on a shoe inner sole, and having a housing recess 2b formed in an upper surface 2a; the flat heat generating element 3 disposed to be housed in the housing recess 2b, and generating heat by power supply while controlling the temperature by itself; and a lid member 4 removably fitted into the housing recess 2b housing the flat heat generating element 3, and formed with at least one heat passing hole 4b for passing the heat of the flat heat generating element 3.

Description

  The present invention relates to an insole, and more particularly to an insole for a shoe having a planar heating element.

  Conventionally, when working in a cold place, in order to keep the inside of the shoe away from the cold, a plurality of socks are put on, or a chemical heating element such as a warmer is put in the shoe. However, in any case, there is a problem that the heat retaining effect in the shoe disappears after a long time has passed. In addition, when a chemical heating element is placed in the shoe, there is a problem that the temperature of the chemical heating element rises temporarily and causes low-temperature burns. For this reason, the inside of shoes could not be kept warm.

  In addition, instead of the chemical heating element, a resistance heating element such as a nichrome wire that generates heat when supplied with power can be used, and the temperature of the resistance heating element can be adjusted by a controller. However, this method is not suitable for actual use because the controller becomes large and easily disturbs the work.

  In view of this, there has been proposed a shoe including a planar heating element that receives power supply and generates heat while performing self-temperature control (for example, see Patent Documents 1 and 2).

Utility model registration No. 3061750 Utility model registration No. 3061148

In the shoe described in Patent Document 1, a planar heating element is provided inside the shoe sole, an insole is laid on the planar heating element, and a power source such as a battery and a switch are provided on the heel portion of the shoe. When the user wears shoes, the insole and the planar heating element are pressed to turn on the switch, so that the planar heating element receives power supply and generates heat to a predetermined temperature.
However, according to the shoe described in Patent Document 1, since the insole is directly laid on the planar heating element, the planar heating element is in friction with the insole in, for example, work for a long time or work involving intense exercise. It becomes fragile by etc. In addition, when the user wears shoes, the switch is turned on via the insole and the planar heating element, but the switch may be turned off, for example, when standing on the toes. , Can not keep warm in the shoes comfortably. For this reason, it is thought that the shoes of patent document 1 are unsuitable for actual use.
Patent Document 1 does not disclose or suggest the structure of an insole of a shoe provided with a planar heating element as in the present invention described later.

On the other hand, in the shoe described in Patent Document 2, a planar heating element having a PTC (Positive Temperture Coeffcient) characteristic is attached to the shoe sole, and the planar heating element and the power source are connected via a power line. ing. A power source is attached to the waist around the worker and the like, and supplies power to the planar heating element.
However, Patent Document 2 only vaguely describes that a planar heating element is attached to a shoe sole, and what structure the planar heating element is attached to which part of the shoe sole. There is no description of whether or not, and the realization thereof requires trial and error.
Further, Patent Document 2 cannot disclose or suggest the structure of an insole of a shoe provided with a planar heating element as in the present invention described later, as in Patent Document 1.

  Further, in the shoes described in Patent Documents 1 and 2, when it is inferred from the fact that the planar heating element is integrally provided on the shoe sole, when replacing the failed planar heating element with a new one, the shoe is disassembled. Or the shoes themselves need to be replaced, which takes time and effort. Moreover, since these shoes are mainly designed to provide a planar heating element on the sole, there is no consideration for the convenience of care (for example, washing) when the inside of the shoe is dirty.

  The present invention provides a shoe insole that is compact, easy to replace and care for a planar heating element, and excellent in practicality and fit.

In order to solve the above-mentioned problems, the present invention provides an insole body that is disposed on a shoe sole in a shoe and has a housing recess formed on an upper surface thereof, and is disposed so as to be housed in the housing recess, and is self-received upon receiving power supply. A sheet heating element that generates heat while controlling the temperature, and one or more heat passage holes that are detachably fitted in the housing recess that houses the sheet heating element and allow the heat of the sheet heating element to pass therethrough. And an insole provided with a lid member.
According to this configuration, a planar heating element capable of self-temperature control is used as the heating element, and the planar heating element and the lid member are accommodated in the accommodating recess of the insole body. Therefore, according to the insole according to the present invention, a large-sized controller as in the prior art is not required, and the planar heating element and the lid member can be accommodated in the insole body, so that a compact insole can be realized. In addition, since the planar heating element is detachable from the insole body, the planar heating element can be easily replaced. Furthermore, since this insole can be easily carried and used for various shoes, it is excellent in practicality.

In the above configuration, the insole body includes a through passage formed from the bottom surface of the housing recess toward the lower surface of the insole body, and a grooved passage formed in the lower surface of the insole body so as to communicate with the through passage. It is preferable that a power line for supplying power to the planar heating element is disposed so as to pass through the through passage and the groove passage.
According to this configuration, the power supply line for supplying power to the planar heating element is configured to be disposed in the through passage and the groove-like passage formed in the insole body. Therefore, according to the insole according to the present invention, the power supply line is accommodated in the insole body, and power can be supplied to the planar heating element while maintaining compactness, which is excellent in practicality.

The said structure WHEREIN: It is preferable that the said heat passage hole is formed in multiple numbers and has comprised the mesh structure or the slat structure.
According to this configuration, the heat passage hole is configured to have a mesh structure or a slat structure. Therefore, according to the insole according to the present invention, the lid member can efficiently spread the heat of the planar heating element into the shoe while serving as a lid.

In the above configuration, the insole body has one or more positioning protrusions formed on the bottom surface of the housing recess, and the planar heating element has an engagement hole that engages with the positioning protrusion. And the lid member has an engagement hole or an engagement recess that engages with the positioning protrusion, and the positioning protrusion engages with the engagement hole of the planar heating element and the lid member. It is preferable that the planar heating element and the lid member are positioned with respect to the insole body by engaging with the hole or the engaging recess.
According to this configuration, the planar heating element and the lid member are configured to be positioned with respect to the insole body by the positioning protrusion formed in the housing recess. Therefore, according to the insole according to the present invention, the movement of the planar heating element and the lid member in the accommodation recess is restricted even in work over a long period of time or work involving intense exercise, and in particular, the planar heating element is accommodated. It is possible to prevent breakage due to friction with the recess.

In the above configuration, the planar heating element includes a base insulating film made of a flexible material, a pair of electrode portions printed and formed on the base insulating film using a conductive ink, and the base. A heat generating part printed using PTC ink between the electrode parts on the insulating film for use, and a flexible film that is bonded to the insulating film for the base so as to cover at least the electrode part and the heat generating part It is preferable to consist of a coating insulating film made of a material.
According to this configuration, the electrode portion and the heat generating portion are printed and formed on the base insulating film made of a flexible material using the conductive ink and the PTC ink, respectively, and the printed electrode portion and the heat generating portion are further formed. The portion is configured to be covered with a covering insulating film made of a flexible material. Therefore, according to the insole according to the present invention, the thickness of the planar heating element can be made very thin, so that the insole containing the planar heating element can be made thin and light. Further, according to this insole, since the electrode portion and the heat generating portion are sealed with the insulating film for base and the insulating film for covering, there is no fear of leakage or disconnection, and sheet heat generation Care (for example, washing etc.) when a body becomes dirty also becomes easy. Further, according to this insole, since the insulating film for base and the insulating film for covering have flexibility, the planar heating element can be bent into various shapes, Excellent fit for shoes.

  According to the present invention, it is possible to provide a shoe insole that is compact, easily replaces and cares for a planar heating element, and has excellent practicality and fit.

1 is an exploded perspective view of a shoe insole according to a first embodiment of the present invention. (A) is a front view showing the entire sheet heating element of FIG. 1, (B) is a bottom view of the insole body of FIG. 1, (C) is a cross-sectional view taken along line AA ′ of FIG. D) is a cross-sectional view taken along line BB ′ of FIG. (A) is a front view of the sheet heating element of FIG. 1, (B) is a cross-sectional view taken along the line CC ′ of (A), and (C) is taken along the line DD ′ of (A). It is sectional drawing. It is a figure explaining the heat_generation | fever principle of a planar heating element, (A) is a figure explaining the internal change of the heat generating part when temperature is low, (B) demonstrates the internal change of the heat generating part when temperature is high. FIG. FIG. 4 is an exploded perspective view of a shoe insole according to a second embodiment of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an exploded perspective view of a shoe insole according to a first embodiment of the present invention. 2A is a front view showing the entire sheet heating element of FIG. 1, FIG. 2B is a bottom view of the insole body of FIG. 1, and FIG. 2C is a cross-sectional view taken along the line AA ′ of FIG. (D) is sectional drawing which followed the BB 'line of FIG.
As shown in FIG. 1 and FIGS. 2A to 2D, the insole 1 includes an insole body 2, a planar heating element 3, and a lid member 4.

The insole body 2 is disposed on the shoe sole in the shoe and is made of, for example, an elastic material or a non-elastic material having heat insulation properties. The insole body 2 includes an accommodation recess 2b, a through passage 2d, and a groove-like passage 2e. The housing recess 2 b is formed on the upper surface 2 a of the insole body 2. The through passage 2d is formed from the bottom surface 2c of the housing recess 2b toward the lower surface 2f of the insole body 2. The groove-shaped passage 2e is formed in the lower surface 2f of the insole body 2. One end of the groove-like passage 2e communicates with the through passage 2d, and the other end extends to the edge (for example, the heel side edge) of the lower surface 2f of the insole body 2.
A power supply line L for supplying power to the planar heating element 3 is disposed so as to pass through the through passage 2d and the groove-like passage 2e. One end of the power supply line L is connected to a heat generating portion of the planar heating element 3 described later, and the other end is connected to a power supply (not shown). The power source is preferably arranged outside the shoe rather than in the shoe, for example, attached around the operator's waist. As a power source, a general-purpose simple power source such as a dry battery or a rechargeable battery (one that outputs a low voltage of about several volts to several tens of volts) is used.

  The planar heating element 3 is disposed so as to be housed in the housing recess 2b, and generates heat while receiving power supply and controlling its own temperature. Next, the structure and heat generation principle of the planar heating element 3 will be described.

3A and 3B are views for explaining the structure of the sheet heating element 3, wherein FIG. 3A is a front view of the sheet heating element of FIG. 1, and FIG. 3B is a cross-sectional view taken along the line CC ′ of FIG. (C) is sectional drawing which followed the DD 'line of (A).
As shown in FIGS. 3A and 3B, the planar heating element 3 includes a base insulating film 3a, a pair of electrode portions 3b and 3c, a heat generating portion 3d, and a covering insulating film 3e. Consists of.
The base insulating film 3a is made of a flexible material such as a urethane film. The pair of electrode portions 3b and 3c are printed and formed on the base insulating film 3a using a conductive ink. The heat generating portion 3d is printed and formed using the PTC ink 3d between the electrode portions 3b and 3c on the base insulating film 3a. Here, the PTC ink 3d is a known ink having a PTC characteristic (resistance temperature characteristic in which the resistance value increases as the temperature rises, and the resistance value increases rapidly when the temperature reaches a predetermined temperature). The heat generating part 3d is made of a mixture of 3g of a matrix material (for example, semiconductor particles) and a conductive material (for example, metal powder, carbon black, graphite, etc.) 3h. The PTC characteristics of the heat generating portion 3d are determined by, for example, the types, content, printing area, and the like of the matrix material 3g and the conductive material 3h. The covering insulating film 3e is made of a flexible material such as a urethane film, for example, similarly to the insulating base film 3a. The covering insulating film 3e is bonded to the base insulating film 3a so as to cover at least the electrode portions 3b and 3c and the heat generating portion 3d. The sealed portion 3i is formed by bonding the insulating film 3a for base and the insulating film 3e for covering. By this sealing part 3i, each substance 3g, 3h of the heat generating part 3d does not leak to the outside, and leakage from the electrode parts 3b, 3c is prevented. Each thickness of the insulating film 3a for the base, the electrode parts 3b and 3c, the heat generating part 3d, and the insulating film 3e for covering can be appropriately adjusted to any thickness, but in order to obtain an appropriate predetermined temperature, several μm It is preferable to be in a range of ˜several mm. Thus, the thickness of the planar heating element 3 is considerably thinner than the thicknesses of conventional chemical heating elements and resistance heating elements.
As shown in FIG. 3C, the power supply line L includes a base insulating film 3a, a pair of electrode portions 3b and 3c, and a covering insulating film 3e, and extends from the heat generating portion 3d to the power source. .

4A and 4B are diagrams for explaining the heat generation principle of the sheet heating element. FIG. 4A is a diagram for explaining the internal change of the heating part of the sheet heating element when the temperature is low, and FIG. 4B is the case when the temperature is high. It is a figure explaining the internal change of the heat generating part of a planar heating element.
As shown in FIG. 4A, when the temperature is low, the conductive material 3h of the heat generating portion 3d is likely to be connected in a chain, so that the resistance value is lowered and the current easily flows. On the other hand, as shown in FIG. 4B, when the temperature is high, the matrix material 3g of the heat generating portion 3d expands and breaks the chain of the conductive material 3h, so that the resistance value increases rapidly and current does not flow easily. Become. Accordingly, when the planar heating element 3 reaches a predetermined temperature (temperature when the chain of the conductive material 3h is broken), the temperature does not rise any further.

  As shown in FIG. 1, the lid member 4 is detachably fitted into the housing recess 2 b that houses the planar heating element 3. The lid member 4 is formed with one or more heat passage holes 4b inside the outer frame portion (edge portion) 4a. The heat of the sheet heating element 3 passes through the heat passage hole 4b and spreads into the shoe. In this embodiment, a plurality of heat passage holes 4a are formed to form a mesh structure. With this mesh structure, the lid member 4 can more efficiently spread the heat of the planar heating element 3 into the shoe while serving as a lid. Instead of the mesh structure, a plurality of heat passage holes 4a may be formed to form a slat structure.

(Experimental example)
The above-mentioned insole was manufactured by the following procedure and placed on the shoe sole in the shoe, and the temperature in the shoe was measured.
First, a 70 μm-thick urethane film is used as the base insulating film 3a, and a silver paste is printed on the base insulating film 3a to form a pair of comb-shaped electrode portions 3b and 3c. PTC ink 3d was printed between the electrode portions 3b and 3c to form a heat generating portion 3d having a size of about 25 cm ² . Next, a 70 μm-thick urethane film is used as the covering insulating film 3e, and this covering insulating film 3e is applied to the base insulating film 3a so as to cover the electrode portions 3b, 3c and the heat generating portion 3d. In addition, a planar heating element 3 was manufactured. Then, the sheet heating element 3 is accommodated in the accommodating recess 2b, the power line L is connected to the power source made of a rechargeable battery through the through passage 2d and the groove-like passage 2e, and the lid member 4 is further connected to the accommodating recess 2b. The insole 1 was manufactured by fitting. A 12 V power supply was supplied to the manufactured insole 1, and the temperature of the upper opening of the heat passage hole 4 a of the lid member 4 was measured.
As a result, the temperature of 40 ° C. could be kept constant for about 10 hours or longer (long time) in the shoe.

According to the insole 1, the planar heating element 3 capable of self-temperature control is used, and the planar heating element 3 and the lid member 4 are accommodated in the accommodation recess 2b. Therefore, a large-sized controller as in the prior art becomes unnecessary, and a compact insole can be realized. Further, since the planar heating element 1 is detachable from the insole body 2, the planar heating element 1 can be easily replaced. Furthermore, since this insole 1 can be easily carried and used for various shoes, it is excellent in practicality.
Further, since the power supply line L is disposed in the through passage 2d and the groove-like passage 2e and accommodated in the insole body, power supply to the planar heating element 2 can be performed while maintaining compactness.
Further, the electrode portions 3b, 3c and the heat generating portion 3d are printed and formed on the base insulating film 3a using the conductive ink and the PTC ink, respectively, and the printed electrode portions 3b, 3c and the heat generating portion 3d are covered. It is covered with an insulating film 3e. Therefore, the thickness of the planar heating element 3 can be made very thin, and the insole 1 in which the planar heating element 3 is accommodated can be made thin and light. In addition, since the electrode portions 3b and 3c and the heat generating portion 3d are sealed with the base and covering insulating films 3a and 3e, there is no fear of leakage or disconnection, and a planar heating element. Care (for example, washing etc.) when 3 becomes dirty also becomes easy. Furthermore, since the insulating films 3a and 3e for the base and the covering are both flexible, the planar heating element 3 can be bent into various shapes, which is excellent for various shoes. A good fit.

(Second embodiment)
Incidentally, the insole 1 according to the first embodiment partially heats the sole (the toe-side sole portion) and does not warm the entire sole. In addition, in the insole 1 according to the first embodiment, the planar heating element and the lid member may move in the housing recess during work over a long period of time or work involving intense exercise. Accordingly, the insole according to the second embodiment is obtained by changing the structures of the insole body, the planar heating element, and the lid member in order to solve these problems.
FIG. 5 is an exploded perspective view of a shoe insole according to a second embodiment of the present invention. The insole 10 according to the second embodiment includes the insole body 20, the planar heating element 30, and the lid member 40. The insole body 20 includes a positioning protrusion 20f, the planar heating element 30 and the lid member 40. Are provided with engagement holes 30f and 40f, respectively, and the shape of the heat passage hole 40b is different from the insole 1 according to the first embodiment. Therefore, only these points will be described.

  The insole body 20 has a housing recess 20b larger than that of the first embodiment, and two positioning protrusions 20f, corresponding to the shape of the sole. The positioning protrusion 20f is formed on the bottom surface 20c of the housing recess 20b. The height of the positioning protrusion 20f is arbitrarily determined, but is preferably equal to or less than the depth of the housing recess 20b.

  The planar heating element 30 has relatively large electrode portions 30b and 30c and a heating portion 30d corresponding to the shape of the soles. Further, the planar heating element 30 further includes two engagement holes 30f. Each engagement hole 30f is disposed on the corresponding positioning protrusion 20f, and engages with the positioning protrusion 20f. In the planar heating element 30, as in the insole of the first embodiment, the sealed portion 30 i is formed by bonding the base insulating film 30 a and the covering insulating film 30 e. This sealed portion 30i prevents leakage from the electrode portions 30b and 30c.

  The lid member 40 has a heat vent 40b having a large opening area, although the number is smaller than that of the first embodiment. The lid member 40 further has two engagement holes 40f. Each engagement hole 40f is disposed on the corresponding positioning protrusion 20f and engages with the positioning protrusion 20f.

  Therefore, according to the insole 10, the positioning protrusion 20f is engaged with the engagement holes 30f and 40f of the planar heating element 30 and the lid member 40, so that the planar heating element 30 and the lid member 40 are insole. Positioned relative to the body 10. For this reason, the movement of the planar heating element 30 and the lid member 40 in the accommodation recess 20b is limited even in work over a long period of time, work that involves intense exercise, and the like. Breakage due to friction or the like can be prevented.

  As mentioned above, although preferable embodiment of this invention was described, the structure of this invention is not limited to these embodiment.

  Each structure of the insole body, the sheet heating element, and the lid member is not limited as long as the structure can accommodate the sheet heating element and the lid member in the insole body.

  In order to warm various parts of the sole, a plurality of receiving recesses are provided in the insole body, a plurality of sheet heating elements and lid members are prepared, and each sheet heating recess and the sheet heating element and the lid member are respectively stored. May be.

  The through-passage and the groove-like passage are provided at arbitrary positions on the insole body, and a plurality of through-passages and groove-like passages may be provided. Further, the structure is not limited to the structure of the through-passage and the groove-shaped passage. For example, if the power supply line can be accommodated in the insole body, the power supply line is formed in the side of the insole body from the side of the housing recess You may make it a structure arrange | positioned in a channel | path.

  The number, shape, and arrangement layout of the heat passage holes of the lid member are not limited as long as the heat of the sheet heating element in the housing recess can be transferred into the shoe.

In the insole of the second embodiment, the structure in which the lid member has the engagement hole is shown. However, instead of the engagement hole, the lid member has an engagement recess formed on the lower surface, and this engagement It is good also as a structure where the protrusion part for positioning engages with a recessed part.
Further, the number and shape of the positioning protrusions and the engagement holes (engagement recesses) are not limited as long as the planar heating element and the lid member are positioned on the insole body. Needless to say.

1, 10 insole 2, 20 insole body 2a, 20a upper surface 2b, 20b receiving recess 2c, 20c bottom surface 2d, 20d through passage 2e, 20e grooved passage 2f lower surface 3, 30 planar heating element 3a, 30a insulating film for base 3b, 3c, 30b, 30c Electrode part 3d, 30d Heat generating part 3e, 30e Insulating film 3g for coating Matrix substance 3h Conductive substance 3i, 30i Sealing part 4, 40 Lid member 4a Outer frame part 4b, 40b Heat passage hole 20f Positioning protrusion 30f Engagement hole 40f Engagement hole L Power line

Claims (5)

An insole body disposed on a shoe sole in the shoe and having an accommodation recess formed on the upper surface;
A sheet-like heating element that is disposed so as to be accommodated in the accommodation recess, and generates heat while receiving power supply and self-temperature control;
An insole comprising: a lid member that is detachably fitted into the housing recess housing the planar heating element and has one or more heat passage holes for allowing the heat of the planar heating element to pass therethrough. . The insole body has a through passage formed from the bottom surface of the housing recess toward the lower surface of the insole body, and a groove-like passage formed in the lower surface of the insole body so as to communicate with the through passage. ,
2. The insole according to claim 1, wherein a power line for supplying power to the planar heating element is disposed so as to pass through the through passage and the groove passage.   The insole according to claim 1 or 2, wherein a plurality of the heat passage holes are formed to form a mesh structure or a slat structure. The insole body has one or more positioning protrusions formed on the bottom surface of the housing recess,
The planar heating element has an engagement hole that engages with the positioning protrusion,
The lid member has an engagement hole or an engagement recess that engages with the positioning protrusion,
When the positioning protrusion engages with the engagement hole of the planar heating element and the engagement hole or the engagement recess of the lid member, the planar heating element and the lid member are positioned with respect to the insole body. The insole according to any one of claims 1 to 3, wherein   The planar heating element includes a base insulating film made of a flexible material, a pair of electrode portions printed using conductive ink on the base insulating film, and the base insulating film. A heating part printed using PTC ink between the upper electrode parts, and a cover made of a flexible material that is bonded to the insulating film for base so as to cover at least the electrode part and the heating part The insole according to any one of claims 1 to 4, wherein the insole is made of an insulating film.

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