JP6137802B2 - Disposable body warmer - Google Patents

Description

  The present invention relates to a disposable body warmer.

  For example, as described in Patent Documents 1 and 2, conventionally, a disposable body warmer having a structure in which a heat generating portion is divided into several cells so as to easily follow the curved surface of the body is known. .

European Patent No. 0967944 Japanese Utility Model Publication No. 06-26829

  However, when there are a plurality of cells in this way, there is a case where variation in the filling of the exothermic powder occurs between the cells and temperature unevenness occurs between the cells. Further, even when the filling variation is eliminated, there is a problem in that the air permeability may change between cells depending on the state of application to the body, and temperature unevenness between the cells also occurs.

  Therefore, an object of the present invention is to provide a disposable body warmer that keeps the body fit to a curved body surface and suppresses temperature variations between heat generating portions.

In order to achieve the above object, the disposable body warmer of the present invention includes a plurality of heat generating parts including a heat generating powder that generates heat due to the presence of air, and a plurality of heat generating parts in a state where air permeability to the plurality of heat generating parts is ensured. Each of the plurality of heat generating portions has at least four heat generating portions spaced from each other in the first direction, and each of the at least four heat generating portions includes: , in a second direction crossing the first direction has a first end and a second end, inside the layered structure, the relation of next to each other mutually Oite at least four heating portion heating between parts so that air flows are at least three connecting portion is provided connecting the first ends of the heat generating portion in relation next to each other mutually.

According to the present invention, air (oxygen) necessary for heat generation or air warmed by heat generation can travel between the at least four heat generating portions via the connecting portion. Thereby, even if there is variation in air permeability or filling variation in the heat generating powder in the heat generating portion, temperature unevenness between the heat generating portions can be suppressed or eliminated. In addition, since the portion where the exothermic powder does not exist in the laminated structure is easily bent, the fit of the body warmer to the body curved surface can be maintained.

Preferably, the exothermic powder is also contained in at least three connecting portions.

  According to this aspect, since the connecting portion becomes thick due to the presence of the exothermic powder, the body is prevented from being completely bent on the line passing through the connecting portion. As a result, the body warmer does not bend completely, but is curved along the body curved surface, so that it is easy to attach to the body curved surface.

Preferably, the at least four heat generating portions include two heat generating portions having a first planar shape and two heat generating portions having a second planar shape, and the first planar shape and the second plane. The shape may be a different type.

  Preferably, the stacked structure has a first surface on one side in the stacking direction and a second surface on the other side in the stacking direction, and at least one of the first surface and the second surface has air permeability.

  In this way, by making the entire surface breathable, compared to the case where only the portion corresponding to the heat generating portion of the first surface and the second surface is breathable, the heat generating portion and the breathable portion of the surface Cairo can be easily manufactured, for example, by requiring no strict alignment. Further, air permeability can be easily secured to the connecting portion.

  More preferably, the laminated structure includes a breathable sheet constituting the first surface or the second surface, and the breathable sheet restricts the amount of air flow so that a negative pressure is generated in the heat generating portion when the warmer is used. It should be a thing.

  By carrying out like this, the movement of the exothermic powder at the time of use of a warmer can be suppressed.

  Here, when using the warmer, the warmed air in the heat generating portion moves to the upper side of the warmer in the heat generating portion.

Therefore, it is preferred that, the first end the at least three connecting part connects, when positioned on the head side of the user when applying the Cairo user's body.

  By doing so, the warm air moving to the upper side of the warmer can easily move between the heat generating portions. Therefore, the temperature unevenness between the heat generating parts is more easily eliminated.

Alternatively, it is preferred that, the first end the at least three connecting part connects, when positioned on the foot side of the user when applying the Cairo user's body.

This arrangement is particularly useful when the heating powder filled by the manufacturing method of the lower system can move the consolidated portion. This is because the filling variation between the heat generating portions of the heat generating powder unevenly distributed under the heat generating portions due to gravity can be corrected.

Preferably, the at least three connecting portions have a width of 1 mm or more and the width is 1 to 60% with respect to the width of at least four heat generating portions.

  Thus, the movement of the air in a connection part is securable by making the width | variety of a connection part into 1 mm or more. That is, if the width is less than 1 mm, smooth movement of air becomes difficult. Moreover, a feeling of use and the fitting property to a body curved surface are securable by making the width of a connection part into 60% or less with respect to the width | variety of a heat generating part. In other words, if the width of the connecting portion exceeds 60% of the width of the heat generating portion, the amount of powder between the heat generating portions may be biased when the heat generating powder can move between the heat generating portions, which may impair the usability. Sex comes out. In addition, when the exothermic powder is present in the connecting portion, the three-dimensional curvature is suppressed, which may make it difficult to follow the curved body surface. The “width” of the connecting portion refers to the length in the direction orthogonal to the extending direction of the connecting portion (the direction connecting the heat generating portions). Further, the “width” of the heat generating portion refers to the length in the same direction as the “width” of the connecting portion.

Preferably, the at least three connecting portions have a width of 5 mm or more and the width is 1 to 40% with respect to the width of at least four heat generating portions.

  Such a configuration is useful when exothermic powder is present in the connecting portion. That is, by setting the width of the connecting portion to 5 mm or more, it is possible to prevent the body from being easily bent on the line passing through the connecting portion. Further, by making the width of the connecting portion 40% or less with respect to the width of the heat generating portion, it is possible to satisfactorily ensure the ease of three-dimensional bending.

  Preferably, the plurality of heat generating portions may be arranged in a lattice shape.

  By doing so, for example, the manufacturing method can be facilitated because it can be manufactured by the manufacturing method of the lower method without adopting the magnetic transfer type manufacturing method.

It is a top view of the disposable body warmer concerning an embodiment. It is the schematic cross section cut | disconnected by the II-II line | wire of FIG. It is the schematic cross section cut | disconnected by the III-III line | wire of FIG. It is a top view of the disposable body warmer concerning the 1st modification. It is a top view of the disposable body warmer concerning the 2nd modification. It is a top view of the disposable body warmer which concerns on a 3rd modification. It is a top view of the disposable body warmer concerning the 4th modification. It is a top view of the disposable body warmer concerning the 5th modification. It is a top view of the disposable body warmer concerning the 6th modification. It is a top view of the disposable body warmer concerning the 7th modification. It is a top view of the disposable body warmer concerning the 8th modification. It is a top view of the disposable body warmer concerning the 9th modification.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1-3, the disposable body warmer 1 is provided with the laminated structure 2 which is a strip | belt-shaped body, the some heat generating part 3 arrange | positioned inside the laminated structure 2, and several connection part 4a, 4b. Yes. The heat generating part 3 and the connecting parts 4a and 4b are filled with heat generating powder 5 that generates heat in the presence of air. As the exothermic powder 5, for example, an oxidation exothermic composition obtained by blending iron powder, activated carbon, non-activated carbon, metal salt, moisture and the like at a predetermined ratio can be used. As long as the exothermic powder 5 is a powder having a property of reacting with oxygen in the air to generate heat, a known disposable warmer exothermic powder can be used. The disposable body warmer 1 is enclosed in a non-breathable outer bag (not shown) before use, and is taken out of the outer bag at the time of use so that air permeates the laminated structure 2 and touches the heat generating powder 5. As a result, the exothermic powder 5 starts to generate heat. Moreover, the disposable body warmer 1 has the flexibility which fits the three-dimensional curved surface of a user's body at the time of use as a whole.

  The laminated structure 2 is mainly formed by laminating a breathable sheet 11 on the front surface side and a non-breathable sheet 12 on the back surface side. The breathable sheet 11 and the non-breathable sheet 12 are flexible enough to fit the curved surface of the body. The heat generating portion 3 and the connecting portions 4a and 4b are arranged between the air permeable sheet 11 and the non-breathable sheet 12. The air permeable sheet 11 ensures the air permeability to the heat generating portion 3 and the connecting portions 4a and 4b. Yes. The breathable sheet 11 and the non-breathable sheet 12 are bonded to each other (for example, heat-sealed) at portions other than the heat generating portion 3 and the connecting portions 4a and 4b. That is, the heat generating part 3 and the connecting parts 4a and 4b are provided in the laminated structure 2 so as to be partitioned by the seal part 13 that bonds the air permeable sheet 11 and the non-air permeable sheet 12, and the internal heat generation. The powder 5 is prevented from leaking. The disposable body warmer 1 is configured so that it can be completely bent by the seal portion 13.

  The breathable sheet 11 has a property of allowing air to permeate in the laminating direction over the entire area in the planar direction. Moreover, the air permeable sheet 11 is configured such that the air flow rate is limited to a certain level so that the inside of the heat generating portion 3 becomes a negative pressure when the disposable body warmer 1 is used. The breathable sheet 11 having such a property can be constituted by, for example, a nylon nonwoven fabric and a polyethylene porous layer bonded together with an adhesive layer. In this case, the nylon nonwoven fabric constitutes the surface of the laminated structure 2 (one surface in the laminating direction, that is, the first surface). In addition, the polyethylene porous layer functions to restrict the air flow rate to a certain level.

  In addition, the material of the air permeable sheet 11 is not limited to the above. For example, instead of nylon nonwoven fabric, rayon, polyester, cellulose, cotton, hemp, silk, wool, viscose rayon, acrylic vinylon, polypropylene, acetate, glass fiber, polyurethane, etc. may be used. Good. Moreover, you may use porous layers, such as a polypropylene, a polyethylene-polypropylene copolymer, a nylon-polyethylene copolymer, instead of a polyethylene porous layer. Furthermore, the air permeable sheet 11 may be formed of a single material layer instead of a plurality of material layers.

  The non-breathable sheet 12 has the property of not allowing air to permeate in the laminating direction over the entire area in the planar direction. The non-breathable sheet 12 is made of, for example, polypropylene. However, instead of this, polyethylene, polyethylene-polypropylene copolymer, nylon-polyethylene copolymer, etc. may be used to form a single layer or a plurality of layers including one or more of these. Good. In the case of a plurality of layers, it is sufficient that at least one layer has air permeability.

  The non-breathable sheet 12 constitutes the back surface of the laminated structure 2 (the other surface in the stacking direction, i.e., the second surface), and an adhesive portion 14 is provided on the back surface. The adhesive part 14 is a part for removably attaching the disposable body warmer 1 to the user's body or clothes, and is protected by release paper (not shown) before the attachment. The adhesive portion 14 can be formed of acrylic resin or rubber resin. The number, position, size, and range of the adhesive portions 14 can be determined according to the use of the disposable body warmer 1. Here, the adhesion part 14 is provided in two places (two places of the longitudinal direction of a strip | belt-shaped body) of the back surface of the laminated structure 2 in the position remove | deviated from the heat generating part 3 and connection part 4a, 4b.

  Each of the plurality of heat generating portions 3 includes the heat generating powder 5 in a small accommodation space. The housing space is defined in a flat bag shape by the breathable sheet 11 and the non-breathable sheet 12, and the periphery of the bag is sealed by the seal portion 13. The accommodation space is not completely filled with the exothermic powder 5 (with no gaps), but the exothermic powder 5 is filled in a form having a certain degree of fluidity. However, when the exothermic powder 5 starts to generate heat, the function of the breathable sheet 11 causes a negative pressure in the accommodation space. For this reason, when the disposable body warmer 1 is used, the space where the exothermic powder 5 can move in the accommodation space is reduced or eliminated.

  The plurality of heat generating parts 3 are arranged at equal intervals from each other, and the number, arrangement, and planar shape of the heat generating parts 3 can be determined according to the use of the disposable body warmer 1. Here, corresponding to the rectangular disposable body warmer 1 that is horizontally long in plan view, four heating elements 3 that are vertically long rectangular in plan view are arranged at regular intervals in the horizontal direction. As long as the magnitude | size of the heat generating part 3 is larger than the magnitude | size of the connection parts 4a and 4b, it can be made according to the use of the disposable body warmer 1. FIG. Since the heat generating part 3 is filled with the heat generating powder 5, the disposable body warmer 1 becomes difficult to bend at the position of the heat generating part 3 and is prevented from being completely bent.

  The plurality of connecting portions 4a and 4b connect two adjacent heat generating portions 3 and 3, and the first connecting portion 4a connects the upper end portions 3a and 3a of the heat generating portions 3 and 3 facing each other. The second connecting part 4b connects the lower end parts 3b, 3b of the heat generating parts 3, 3 facing each other. This connecting position takes into consideration the case where the disposable body warmer 1 is applied to the user's body. Specifically, the upper end portions 3a and 3a of the heat generating portions 3 and 3 connected by the connecting portion 4a are portions located on the user's head side, and the connecting portion 4b is the lower end portion 3b of the heat generating portions 3 and 3; 3b is a site | part located in a user's leg | foot side. The interval, the number, the size, the arrangement, and the planar shape of the connecting portions 4a and 4b can be determined according to the mode of the heat generating portion 3 and the use of the disposable body warmer 1.

  The connecting portions 4 a and 4 b include the heat generating powder 5 in a space smaller than the housing space of the heat generating portion 3, and this small space is configured similarly to the housing space of the heat generating portion 3. Specifically, the space of the connecting portions 4a and 4b is defined in a flat tunnel shape by the breathable sheet 11 and the non-breathable sheet 12, and the upper and lower edges (both edges in the vertical direction) are sealed. Sealed by the portion 13 and both left and right end portions (lateral end portions in the horizontal direction) are opened to the accommodating spaces of the heat generating portions 3 and 3. Thereby, between the accommodation space of the adjacent heat-emitting parts 3 and 3, air flows through the space of connection part 4a, 4b. Further, the connecting portions 4a and 4b allow the heat generating powder 5 to flow into and out of the heat generating portions 3 and 3 so that the heat generating powder 5 can move between the heat generating portions 3 and 3. The exothermic powder 5 in the connecting portions 4a, 4b is filled in a mode having a certain degree of fluidity before use, like the exothermic powder 5 in the exothermic portion 3, but at the time of use when heat generation is started. The flow is suppressed under negative pressure.

  Here, since the connecting portions 4a and 4b filled with the exothermic powder 5 are thick, the disposable body warmer 1 is prevented from being bent completely or easily at the positions of the connecting portions 4a and 4b. However, since the connecting portions 4 a and 4 b are smaller than the heat generating portions 3 and 3, the connecting portions 4 a and 4 b can be configured to be easily bent compared to the heat generating portions 3 and 3. For example, the disposable body warmer 1 can be configured to be folded to a certain degree, although not completely, along a vertical line (vertical axis) passing through the connecting portions 4a and 4b.

As a preferred example of the size relationship between the heat generating part 3 and the connecting parts 4a and 4b, the width W ₄ of the connecting parts 4a and 4b is 1 mm or more and the width W _{3 of the} heat generating part 3 is larger. 1-60%. If the width W ₄ is less than 1 mm, because smooth movement of the air becomes difficult. In addition, when the width W ₄ exceeds 60% with respect to the width W ₃ , the amount of powder between the heat generating portions 3 and 3 is biased by the heat generating powder 5 that has moved between the heat generating portions 3 and 3, and the disposable warmer 1 This is because there is a possibility of impairing the feeling of use. Moreover, it is because a three-dimensional curve is largely suppressed by the connection parts 4a and 4b, and it may become difficult to follow a curved body surface. Therefore, by using the above example, it is possible to ensure the feeling of use of the disposable body warmer 1 and the fit to the curved body surface.

Here, the width W _4, the connecting portion 4a, refers to the length in a direction perpendicular to the direction of extension of 4b (transverse connecting the heating unit 3, 3). The width W ₃ refers to the length in the same direction as the width W ₄ . Note that the widths of the connecting portions 4a and 4b may change in the extending direction. In this case, the smallest width corresponds to the width W ₄ of the above.

Further, a more preferred example, the width _{W 4} is 1 to 40% with respect to and the width _{W 3} a at 5mm or more. By setting it as 5 mm or more, it can suppress that the disposable body warmer 1 bends easily along the vertical line which passes along connection part 4a, 4b. Moreover, by setting it to 40% or less, it is possible to satisfactorily ensure the ease of three-dimensional bending between the heat generating portions 3 and 3.

In addition, although the whole size of the disposable body warmer 1 and the dimension of each part can be designed suitably, as an example, it is as follows. The disposable body warmer 1 is a horizontally long rectangle of 290 mm wide × 90 mm long, and the heat generating portion 3 is a horizontally long rectangle of 40 mm wide × 70 mm long. That is, the width _{W 3} being a vertical 70 mm. The connecting portion 4a, the width _{W 4} of the 4b is 10 mm. The heat seal width between the heat generating parts 3 and 3 (the horizontal length of the seal part 13) is 5 mm. Moreover, the filling amount of the exothermic powder 5 in each exothermic part 3 is about 15 g.

Here, the manufacturing method of the disposable body warmer 1 is demonstrated.
Although the disposable body warmer 1 can be manufactured using a known magnetic transfer type manufacturing method, it is described in a known lower method manufacturing method (for example, JP-A-2006-55272) that is easier to manufacture. .). Briefly explaining an example in the case of using the manufacturing method of the lower method, first, the breathable sheet 11 and the non-breathable sheet 12 are respectively fed out from the rolls, and between the pair of seal rolls so that both of them are overlapped in a V shape. invite. The heat generating part 3 is filled with the heat generating powder 5 while heat-adhering the appropriate positions sequentially with a seal roll. Then, it cut | disconnects into the disposable body warmer 1 of predetermined unit length with a cutter. Before and after this cutting, the disposable body warmer 1 is shaken so that the exothermic powder 5 of the exothermic part 3 flows into the connecting parts 4a and 4b. Thereby, the disposable body warmer 1 in which the heat generating powder 5 is filled in the heat generating portion 3 and the connecting portions 4a and 4b is manufactured.

  According to the disposable body warmer 1 of the present embodiment described above, since the heating portions 3 and 3 are connected by the connecting portions 4a and 4b, air (oxygen) necessary for heat generation can travel between the heating portions 3 and 3. It becomes like this. Thereby, even if there is variation in the air permeability in the heat generating units 3 and 3, temperature unevenness between the heat generating units 3 and 3 can be suppressed. Further, since the air heated by the heat generation can go back and forth between the heat generating parts 3 and 3, even if there is a variation in the filling amount of the heat generating powder 5 in the heat generating parts 3 and 3, the heat generating parts 3 and 3 due to the filling variation. It is possible to eliminate the temperature unevenness.

  In particular, the connecting positions of the connecting portions 4a are the upper end portions 3a and 3a of the heat generating portions 3 and 3 that are located on the user's head side when the disposable body warmer 1 is applied to the user's body. For this reason, the warm air which moves to the upper side of the heat generating parts 3 and 3 at the time of use becomes easy to move between the heat generating parts 3 and 3 through the connecting part 4a. Therefore, the temperature unevenness between the heat generating parts 3 and 3 is easily eliminated.

  Moreover, when the disposable body warmer 1 is applied to the user's body, the connecting portion 4b is connected to the lower end portions 3b and 3b of the heat generating portions 3 and 3 that are located on the user's foot side. For this reason, the filling variation of the exothermic powder 5 unevenly distributed downward due to gravity can be corrected. This is particularly useful when the disposable body warmer 1 is manufactured by the following manufacturing method.

  In addition, since the portion where the exothermic powder 5 does not exist (the seal portion 13) is easily bent, it is possible to keep fit to the user's body curved surface. In particular, the disposable body warmer 1 is not completely bent on the vertical line passing through the connecting portions 4a and 4b, but is bent so as to bend along the body curved surface, so that it can be easily attached to the body curved surface. That is, when there is no connection part 4a, 4b, the disposable body warmer 1 will be completely folded in two at the time of attachment, but since there is connection part 4a, 4b, it does not become such attachment work. The disposable body warmer 1 can be three-dimensionally curved and pasted along a curved body surface.

  Moreover, since the air permeable sheet 11 in which the air flow rate is limited is used, the movement of the exothermic powder 5 when the disposable body warmer 1 is used can be suppressed. Thereby, since uneven distribution of the exothermic powder 5 at the time of use is suppressed, the state where the disposable body warmer 1 fits the user's body curved surface can be maintained.

<Modification>
Next, a modified example of the present invention will be described focusing on differences from the above embodiment. In this case, the same components as those in the above embodiment are given the same or similar reference numerals, and the description thereof is omitted. In addition, as shown in FIG.4 and FIG.5A, the aspect which a connection part connects only the upper-lower intermediate part of two heat generating parts in a warmer is outside the scope of the present invention.

  In the disposable body warmer 100 shown in FIG. 4, a plurality of connecting portions 4 c connect the upper and lower intermediate portions of two adjacent heat generating portions 3 and 3 that face each other. The disposable body warmer 100 in which the connecting portion 4c is provided in such a position is more easily curved in three dimensions than the disposable body warmer 1 in which the connecting portions 4a and 4b are provided in the upper and lower positions. For this reason, the disposable body warmer 100 is suitable for use on a body part that is highly movable, such as a user's shoulder.

  In the disposable warmers 110A, 110B, and 110C shown in FIGS. 5A to 5C, all of the adjacent heat generating parts 3 and 3 are not connected by a connecting part. Specifically, in the disposable body warmer 110A or 110B, the two adjacent heat generating parts 3 and 3 on the left side of the figure are connected by the connecting parts 4c or 4a and 4b, and the two adjacent heat generating parts 3 on the right side of the figure, 3 is connected by a connecting part 4c or 4a, 4b, but the two adjacent heat generating parts 3, 3 in the center of the figure are not connected by a connecting part. Further, in the disposable body warmer 110C, the two adjacent heat generating parts 3 and 3 in the center of the figure are connected by the connecting parts 4a and 4b, but the heat generating parts 3 and 3 at the left end and the right end of the figure are connected to the other heat generating parts 3. Independent. As described above, the heat generating units 3 and 3 may be connected in units of units for which the temperature is desired to be uniform.

  In the disposable body warmers 120A and 120B shown in FIGS. 6A to 6B, the arrangement of the plurality of connecting portions 4a, 4b, and 4c differs depending on the positions of the adjacent heat generating portions 3 and 3. For example, in the disposable body warmer 120A, two adjacent heat generating parts 3 and 3 on the left side of the figure are connected by connecting parts 4a and 4b, but two adjacent heat generating parts 3 and 3 in the center of the figure are connected by a connecting part 4c. It is. According to such disposable warmers 120A and 120B, it is possible to make a difference in the ease of folding between the plurality of adjacent heat generating portions 3 and 3. Thereby, compared with the disposable body warmer 1 of FIG. 1, there exists an advantage that it is easy to fold small at the time of packaging.

  In the disposable body warmer 130 shown in FIG. 7, a plurality of heat generating portions 3 are arranged in a lattice shape (regular matrix shape, here 4 × 2 in the horizontal direction). In this case, the two heat generating portions 3 and 3 adjacent in the vertical direction (vertical direction) at both the left and right ends are also connected by the connecting portion 4d. As described above, the plurality of heat generating portions 3 may be arranged in a plurality of rows in the vertical direction, and in that case, the heat generating portions between the rows may be selectively connected by the connecting portion 4d. Alternatively, the heat generating portions between the columns may be selectively connected by the connecting portion 4d, and the heat generating portions between the rows may not be connected by the connecting portion. In addition, when a grid | lattice-like arrangement | positioning is employ | adopted as arrangement | positioning of the several heat generating part 3, since it can manufacture with the manufacturing method of a lower system, without employ | adopting the transfer type manufacturing method by magnetism, there exists an advantage which manufacture becomes easy.

  In the disposable body warmer 140 shown in FIG. 8, the distance between the heat generating parts 3 and 3 is made longer than in the disposable body warmer 1 shown in FIG. Along with this, the lengths of the connecting portions 4a and 4b are also increased. This type of disposable body warmer 140 is suitable for use on the user's elbow or knee. In addition, it is desirable to provide a hook-and-loop fastener 141 on the back surface of this type of disposable body warmer 140 instead of the adhesive portion 14.

  In the disposable body warmer 150 shown in FIG. 9, the laminated structure 2 has a U-shaped planar shape. In such a U-shaped planar shape, the upper center portion of the disposable body warmer 150 is recessed so as to be curved downward, and the center portion of the lower edge of the disposable body warmer 150 projects downward from both ends thereof. It has a gently curved shape. A total of four types of heat generating parts 3 having two types of planar shapes are arranged. This arrangement is symmetrical with respect to the symmetry axis (vertical line), and for example, the heat generating portion 3 can be applied from the neck to the shoulder of the user. The two adjacent heat generating parts 3 and 3 are connected to each other by the connecting part 4 b, and both upper and lower edges of the connecting part 4 b are parallel to the lower edge of the outline of the disposable body warmer 150. Such a disposable body warmer 150 can be used for various parts of the user, but is particularly suitable for use on the neck and shoulders of the user.

  The embodiment and the modification of the present invention have been described above with reference to specific examples. The above specific examples are illustrations for explaining the present invention, and are not intended to limit the present invention only to the embodiments and modifications. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, each element included in each of the specific examples described above and its arrangement, material, shape, size, and the like are not limited to those illustrated, and can be changed as appropriate.

  For example, the exothermic powder 5 may not be included in the connecting portions 4a to 4d. That is, the connecting portions 4a to 4d are passages connected so that air flows between the two heat generating portions 3 and 3, but are not filled with the exothermic powder 5, and from the heat generating portion 3 to the connecting portions 4a to 4a. Outflow to 4d is not allowed. Even in such a configuration, air (oxygen) necessary for heat generation or air warmed by heat generation can come and go through the connecting portions 4a to 4d. Even if there is a variation in the filling of the powder 5, the temperature unevenness between the heat generating parts can be suppressed or eliminated. Moreover, since the part where the exothermic powder 5 does not exist is easy to bend, the fit of the body warmer to the body curved surface can be maintained.

  The connecting portions 4 a to 4 d may connect the heat generating portions 3 and 3 that are not adjacent to each other in the plurality of heat generating portions 3. However, since the direction which connected between the exothermic parts 3 and 3 which are adjacent to each other with the connection parts 4a-4d as mentioned above can connect both with a comparatively short distance, via the connection parts 4a-4d. The air traffic between the generated heat generating parts 3 and 3 is performed in a short time. Therefore, the temperature unevenness of the heat generating part 3 can be suppressed and eliminated at an early stage.

  The connecting portions 4a to 4d may extend in a direction intersecting the horizontal direction or the vertical direction. That is, you may connect between the heat generating parts 3 and 3 by the inclined connection parts 4a-4d. Further, the connecting portions 4a to 4d may be bent or curved and extend not only in one direction. For example, you may form connection part 4a-4d in planar view V shape.

  The planar shape of the heat generating portion 3 may be other shapes such as a square, a parallelogram, a circle, a diamond, an ellipse, a trapezoid, or a vertically long rectangle. Moreover, all the some heat-emitting parts 3 do not need to have the same planar shape and area.

Arrangement | positioning of the several heat generating part 3 is not restricted to a grid | lattice form, As described in patent document 1, the several heat generating part 3 can also be arrange | positioned at random. In that case, a transfer manufacturing method may be used. When using this manufacturing method, first, the exothermic powder 5 is transferred onto a sheet constituting either one of the first surface and the second surface of the laminated structure 2 so as to have a predetermined arrangement. Next, the sheet constituting the other of the first surface and the second surface of the laminated structure 2 is overlapped on this sheet, and both the sheets are heat-sealed so as to define the connecting portion 4. Thereby, the warmer which has arrange | positioned several heat-emitting parts 3 at random can be manufactured.

  The laminated structure 2 can take various planar shapes in addition to a horizontally long rectangular or U-shaped planar shape in plan view. Further, the breathable sheet 11 may be one in which the entire planar region does not have breathability, such as having breathability only for a portion corresponding to the heat generating portion 3. However, making the entire surface breathable as described above is advantageous in that the breathable sheet 11 is easy to manufacture and that precise alignment between the breathable portion and the heat generating portion 3 is not necessary. . Moreover, although the 2nd surface of the laminated structure 2 was comprised with the non-breathable sheet | seat 12, this can also be comprised with the sheet | seat which has air permeability.

  1, 100, 110A, 110B, 110C, 120A, 120B, 130, 140, 150: Disposable body warmer, 2: Laminated structure, 3: Heat generating part, 4a, 4b, 4c, 4d Connecting part, 11: Breathable sheet, 12 : Non-breathable sheet

Claims (11)

A plurality of heat generating parts including heat generating powder that generates heat in the presence of air;
In a state where air permeability to the plurality of heat generating portions is ensured, a disposable body warmer including a laminated structure in which the plurality of heat generating portions are arranged at intervals from each other,
The plurality of heat generating portions have at least four heat generating portions arranged at intervals in the first direction, and each of the at least four heat generating portions is first in a second direction intersecting the first direction. Having an end and a second end,
The inside of the laminated structure, wherein between at least four of the heat generating portion in relation next to each other mutually Oite to the heat generating portion so that air flows, the first end of the heat generating portion in relation next to each other mutually at least three coupling portions are provided, disposable body warmer connecting parts together. The disposable body warmer according to claim 1, wherein the exothermic powder is also contained in the at least three connecting portions. The at least four heat generating parts include two heat generating parts having a first planar shape and two heat generating parts having a second planar shape,
The disposable body warmer according to claim 1 or 2, wherein the first planar shape and the second planar shape are different types . The stacked structure has a first surface on one side in the stacking direction and a second surface on the other side in the stacking direction;
The disposable body warmer according to any one of claims 1 to 3, wherein at least one of the first surface and the second surface has air permeability. The laminated structure includes a breathable sheet constituting the first surface or the second surface,
The disposable body warmer according to claim 4, wherein the air-permeable sheet has a restricted air flow rate so that the inside of the heat generating part has a negative pressure when the body warmer is used. Said at least three said first end What happened the connecting portion connecting the are located on the head side of the user when applying the Cairo body of the user, any one of claims 1 to 5 Disposable body warmer according to item. Said at least three said first end What happened the connecting portion connecting the are located on the foot side of the user when applying the Cairo body of the user, any one of claims 1 to 5 Disposable body warmer according to item . The at least three connecting portions have a width of 1 mm or more, and the width is 1 to 60% with respect to the width of the at least four heat generating portions. The disposable warmer as described. The at least three connecting portions have a width of 5 mm or more and the width is 1 to 40% with respect to the width of the at least four heat generating portions. The disposable warmer as described.   The disposable body warmer according to any one of claims 1 to 7, wherein the plurality of heat generating portions are arranged in a lattice shape. Wherein at least four of the heat generating portion are disposed symmetrically with respect to a line parallel to the front Stories second direction, disposable warmer according to claim 3.

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