Body cooling sheet

Abstract

With conventional cooling garments, people may be hesitant to wear such special garments during everyday business activities in the city, such as shopping, commuting, and going to school.SOLUTION: A connector 23 is detachably attached to a seat body 3 in which a phase change member 15 for absorbing heat is sealed in a storage part 13. When the connector 23 is connected to the side 37a of the shoulder belt of the rucksack 37, they are integrated. The recessed part 9 of the sheet body 3 is bent and fitted to the body side. The concave portion 9 forms a gap with the body side, and this serves as an air escape path. However, the moisture can be released through the air escape path. Further, the sheet body 3 alone can be used as a pillow when the user sleeps in a room, can be laid under the user's back, can be laid on a seat surface of a chair when the user sits on the chair, or can be placed on a backrest of the chair. The phase change member 15 can be solidified again by putting the sheet body 3 in a cooler bag in which the sheet body 3 is folded to be compact and carried.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cooling sheet used to cool the body, and more particularly to a cooling sheet using a phase change material. [Background technology]

[0002] The cooling garment of Patent Document 1 is used as a measure against the heat when working in a high-temperature environment. This cooling garment uses a fan to forcibly create a flow of air that is drawn in from outside between the garment body and the body side, circulates between them, and then escapes to the outside. This air promotes the evaporation of sweat from the human body, thereby actively cooling the body side. The air escapes to the outside through the open edges of the garment body, such as the sleeves and collar. There is also a cooling garment described in Patent Document 2, in which cooling tubes are knitted into the garment and run along it. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-79747 [Patent Document 2] Japanese Patent Application Publication No. 2018-135610 Summary of the Invention [Problem to be solved by the invention]

[0004] However, both are made up of "clothing," and people may be hesitant to wear such special clothing when going about their daily routines in the city, such as shopping or commuting to work or school.

[0005] The present invention was made in response to the above-mentioned conventional problems, and its object is to provide a new and useful cooling sheet that can be detachably attached to everyday carrying items such as backpacks and school bags, and that can easily provide a cooling effect from the back side. [Means for solving the problem]

[0006] The present invention provides a cooling sheet comprising a sheet body formed by joining a flat film and a textured film, and a phase change material that absorbs heat and changes from a solid phase to a liquid phase is enclosed in a storage section surrounded by the convex portions of the textured film and the flat film, and a connector that is detachably attached to the sheet body, and is detachably connected to the shoulder straps of a backpack via the connector, so that the cooling sheet can be placed on the back side of the backpack.

[0007] Preferably, the sheet body has the concave portions of the textured film extending continuously in the up-and-down direction so as to be mountain-foldable. Preferably, the seat body is provided with a mounting portion to which the connecting device is mounted, and the mounting portion forms part of the planar shape of the seat body.

[0008] Preferably, the connector has a loop or hook surface of a hook-and-loop fastener as the attachment portion, and the attached portion of the seat body is made up of a hook or loop surface joined to the seat body. Preferably, the connecting device comprises an insertion tube provided at the attachment part and an endless string with a hook attached, the string being slidably inserted into the insertion tube with the hook folded in half at the crease and bundled together, and the connection can be detached by hooking the string onto the hook and clamping the shoulder strap of the backpack with the loop-shaped portion of which the insertion tube is a part. Preferably, a hook is attached to one end of the string bundled and pulled out from the insertion tube, and a two-hole string stopper is attached to the other end. [Effects of the Invention]

[0009] The cooling sheet of the present invention can be easily attached and detached to everyday backpacks. In addition, the sheet portion of the cooling sheet can be separated and folded to make it compact, so when the cooling effect has worn off, the sheet portion can be placed in an insulated bag or the like to quickly restore the cooling effect. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a plan view of a cooling sheet according to an embodiment of the present invention. [Figure 2] FIG. 2 is a rear view of the cooling sheet of FIG. [Figure 3] 3 is a perspective view showing a state in which the connector of FIG. 2 is connected to a shoulder strap of a backpack. FIG. [Figure 4] 3 is a perspective view showing a state in which the hook of the connector of FIG. 2 is open. FIG. [Figure 5] FIG. 2 is a perspective view showing the cooling sheet of FIG. 1 placed on the backrest side of a backpack. [Figure 6] FIG. 2 is a perspective view showing a state in which the overlapping degree of the cooling sheets in FIG. 1 has been adjusted. [Figure 7] 2 is a perspective view showing a state in which the sheet body of the cooling sheet of FIG. 1 is folded. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] A cooling sheet 1 according to an embodiment of the present invention will be described with reference to the drawings. As shown in Figures 1 and 2, the sheet body 3 is a vertically long rectangle with rounded corners. The sheet body 3 is composed of a flat film 5 and a textured film 7, both of which are made of plastic film made of synthetic resin such as polyethylene. The flat film 5 and the textured film 7 have the same outline, with their edges aligned, and the concave portion 9 of the textured film 7 superimposed on the flat film 5 and joined together to form a single unit. The space surrounded by the convex portion 11 of the textured film 7 and the flat film 5 is sealed to form a box-shaped storage section 13.

[0012] The recessed portions 9 extend linearly in the vertical and horizontal directions in threes within the seat body 3, intersecting each other to form recessed stripes, with the central recessed stripe 9a extending vertically and the central recessed stripe 9b extending horizontally being wider than the other portions. The convex portions 11 are formed between the concave portions 9, and most of the convex portions 11 are rectangular. However, as will be described later, the upper left and right corners of the seat body 3 and the left and right sides near the bottom are reserved as areas for attachment, so the convex portions 11 are formed to avoid these areas, and the convex portions 11 on the left and right sides near the bottom are L-shaped.

[0013] The storage section 13 is relatively low, and the edges and corners are rounded. A phase change material 15 is enclosed in the housing 13. This phase change material 15 is a so-called PCM (Phase Change Material) that absorbs heat and changes from a solid phase to a liquid phase. In the present invention, this phase change material 15 is used as a cooling medium that cools the body by absorbing heat from the body side as latent heat of fusion. The solidification (freezing) temperature of the phase change material 15 is adjusted to 28°C so that a sufficient cooling effect can be felt even at around 28°C in the current heatwave, and so that it can quickly return from a molten state to a solidified state by being placed in a cooler box or an insulated bag containing ice packs, for example in about 10 minutes.

[0014] The phase change material 15 contains, for example, paraffin or aliphatic hydrocarbon (or fatty saturated hydrocarbon). The phase change material 15 contains tetradecane (C 14 H 30 ), hexadecane (C 16 H 34 ), and octadecane (C 18 H 38 The phase change material 15 contains at least one of tetradecane (C 14 H 30 ), hexadecane (C 16 H 34 ), and octadecane (C 18 H 38) may be included.

[0015] Even when the phase change material 15 is sealed in the housing portion 13, the unevenness is relatively shallow and does not feel rough. The sheet body 3 is configured as described above, and is manufactured in the above-described form by simultaneously forming the storage section 13 by overlapping the flat film 5 and the textured film 7 and thermocompression bonding, and then encapsulating the phase change material 15 in the storage section 13. At the time of encapsulation, the phase change material 15 is solid, making it possible to encapsulate it simultaneously with molding.

[0016] A loop surface portion 19 of a circular hook-and-loop fastener 17 is provided on the flat film 5 side, utilizing the attachment portion of the sheet body 3. The back surface of this loop surface portion 19 is joined and integrated with the sheet body 3 by crimping, and the loop surface is exposed. The loop surface of this loop surface portion 19 is detachably engaged with the hook surface of a hook surface portion 21 of the same shape.

[0017] 2, 3, and 4, reference numeral 23 denotes a connector. This connector 23 has the hook surface portion 21 of the hook-and-loop fastener 17. A circular cover sheet 25 is joined to the surface opposite the hook surface of this hook surface portion 21. Opposing edges of small sheets are aligned and joined to this cover sheet 25 to form an integrated unit, and an insertion tube 27 is formed from the small sheets.

[0018] Reference numeral 29 denotes a hook. The opening of this hook 29 is closed by a spring-like opening and closing piece 29a. A connecting ring 31 is attached to this hook 29. Reference numeral 33 denotes a string. The folded portion of this string 33 is tied to the connecting ring 31 using a cow hitch method. The string 33 is slidably passed through the insertion tube 27 with the portions that extend across the connecting ring 31 bundled together, and is further passed through a two-hole string stopper 35. The ends pulled out from the string stopper 35 are then tied together to form a knot 33a. The hook 29 and string stopper 35 are sized so that they cannot pass through the insertion tube 27.

[0019] Connector 23 is configured as described above, and is attached to seat body 3 by pressing the hook surface of hook surface portion 21 against the loop surface of loop surface portion 19 on the seat body 3 side to form a hook-loop engagement. Furthermore, if a force is applied in a direction that pulls the hook surface away from the loop surface, the hook-loop engagement is released and connector 23 can be detached. When used as the cooling sheet 1, connectors 23, 23, 23, 23 are attached to four locations near the left, right, top and bottom edges of the sheet body 3, respectively.

[0020] A backpack, for example, a rucksack 37 is provided with shoulder straps 37a, 37a on the left and right sides. The back support surface 37b of the backpack 37 is flat so as to overlap the back when the backpack is worn, and the sheet body 3 of the cooling sheet 1 is placed on this back support surface 37b so that the flat film 5 side comes into contact with it.

[0021] When the strings 33 of the connecting tool 23 attached to the seat body 3 are bundled and wound around the shoulder belt 37a with the hook 29 side at the front, the opening / closing piece 29a of the hook 29 is opened, one end of the bundled strings 33 between the string stopper 35 and the insertion tube 27 is hooked on the hook 29 and inserted into the hook 29, and then the opening / closing piece 29a is closed. As a result, the string 33 becomes looped and sandwiches the shoulder belt 37a. As shown in Fig. 5, the connectors 23 are connected to one shoulder belt 37a at two locations, one above the other, and are connected symmetrically to the pair of left and right shoulder belts 37a, 37a. In this connected state, the seat body 3 is placed on the back support surface 37b.

[0022] The size of the loop portion can be adjusted by moving the position of the string stopper 35 from the knot 33a side. If the string stopper 35 is moved closer to the knot 33a, the size of the loop portion increases, and conversely, if the string stopper 35 is moved away from the knot 33a, the size of the loop portion decreases. When the loop portion becomes larger, the length of the string 33 extending from the sheet body 3 superimposed on the backrest surface 37b becomes longer, so it can be used even when the sheet body 3 is superimposed on the center of the backrest surface 37b of a large-sized rucksack 37 and there is a distance to the shoulder belt 37a. On the other hand, when the loop portion becomes smaller, the length of the string 33 extending from the sheet body 3 superimposed on the backrest surface 37b becomes shorter, as shown in Figure 6, so that even if the backpack 37 is small, the sheet body 3 can be securely superimposed on the backrest surface 37b.

[0023] When the backpack 37 is worn in this state, the sheet body 3 comes into contact with the body side and wraps around the body. The protruding storage portion 13 contains a phase change material 15, and when the phase change material 15 is in a solid state, the storage portion 13 becomes rigid. However, the recessed portions 9 that form the gaps between the storage sections 13 act as joints, allowing for mountain and valley folds, so that the raised storage sections 13 can be brought into good contact with the body and fitted. Therefore, a large area of ​​the upper surface of each of the storage sections 13, 13, . . . comes into contact with the body without waste.

[0024] In this state, the phase change member 15 sealed in the container 13 absorbs heat from the body side through the uneven film 7, cools down, and melts itself. The recessed portions 9 form gaps between the body side and the seat body, but the edges of these recessed portions 9 are open, providing an escape route for air. The recessed portions 9 extend in a balanced manner in the vertical and horizontal directions and are connected at their intersections, and this escape route for air prevents air from becoming trapped between the body side and the seat body 3, even when a relatively heavy backpack 37 is carried and the seat body 3 is pressed against the body side. In the summer, the heat causes a lot of sweat, and as this sweat evaporates, it becomes stuffy, but by allowing the air to escape through this escape route, it becomes less stuffy.

[0025] In this way, cooling of the body by contact with the phase change member 15 and the escape of evaporated sweat are carried out in parallel, thereby providing an efficient and sufficient cooling effect. The cooling sheet 1 is part of the backpack 37 and is not "clothing," so it can be easily used in town. In addition, the backpack 37 side acts as a light-blocking outer surface for the sheet body 3, preventing direct sunlight from hitting the sheet body 3.

[0026] The cooling sheet 1 can be made to have only the sheet body 3 by removing the connecting member 23, so that it can be used indoors as a pillow when sleeping, placed under the back, placed on the seat of a chair when sitting, or placed against the back of a chair. Also, if there is a part on the back of a chair where the connector 23 can be hooked, the connector 23 can be connected to that part. The connecting device 23 is configured using a hook-and-loop fastener 17, so that it can be quickly removed from the seat body 3 by pulling on the connecting device 23 side, without causing any frustration.

[0027] When the phase change material 15 melts, the connecting member 23 is detached from the sheet body 3, leaving only the sheet body 3, and then the sheet is folded along the grooved ridge portion 9b as a crease, and then the grooved ridge portion 9a is folded along the grooved ridge portion 9a, so that the sheet can be finally compacted to 1 / 4 size as shown in Figure 7. If this compacted product is placed in an insulated bag or a cooler bag, it is possible to solidify the phase change material 15 again. If a cooling material is placed in the insulated bag or the like, solidification can be accelerated.

[0028] Although the embodiments of the present invention have been described in detail above, the specific configuration is not limited to these embodiments, and the invention also includes design changes within the scope of the present invention without departing from the gist of the present invention. For example, the connecting device 23 is constructed using a hook-and-loop fastener 17, but it is also possible to construct it using a snap button, but the hook-and-loop fastener 17 has the advantage that it can be quickly removed from the seat body 3. [Explanation of symbols]

[0029] 1...Cooling sheet 3...Sheet body 5...Flat film 7...Concave and convex film 9...Concave portion 9a, 9b...Concave portion 11...convex portion 13...accommodating portion 15...Phase change member 17...Hook and loop fastener 19...Loop surface portion 21...Hook surface portion 23...Connector 25...Cover sheet 27... Insertion tube 29... Hook 29a...Opening and closing piece 31...Connecting ring 33...String 33a...Knot 35...String stopper 37...Backpack 37a... Shoulder belt 37b... Back support surface

Claims

1. a sheet body formed by joining a flat film and a textured film, and a phase change material that absorbs heat and changes from a solid phase to a liquid phase is enclosed in a storage section surrounded by the convex portions of the textured film and the flat film; A connecting device is provided which is detachably attached to the seat body, The cooling sheet is detachably connected to the shoulder strap of a backpack via the connector, and is placed on the back of the backpack.

2. The cooling sheet according to claim 1, The cooling sheet is characterized in that the sheet body has concave portions of a textured film that extend vertically in a continuous manner so as to be mountain-foldable.

3. The cooling sheet according to claim 2, The seat body is provided with a mounting portion to which the connecting device is attached, The cooling sheet, wherein the attachment portion forms a part of the planar shape of the sheet body.

4. The cooling sheet according to claim 3, A cooling sheet characterized in that the connector has a loop surface portion or a hook surface portion of a hook-and-loop fastener as an attachment portion, and the attachment portion of the sheet body is composed of a hook surface portion or a loop surface portion joined to the sheet body.

5. The cooling sheet according to claim 3 or 4, The connecting device includes an insertion tube provided on the attachment part and an endless string with a hook attached thereto, and the string is folded in half along the crease at the hook and bundled together, and is slidably inserted into the insertion tube; The cooling sheet is detachably connected by hooking the string onto the hook and pinching the shoulder belt of a backpack with the loop-shaped portion of which the insertion tube is a part.

6. The cooling sheet according to claim 5, This cooling sheet is characterized in that a hook is attached to one end of a string bundled and pulled out from an insertion tube, and a two-hole string stopper is attached to the other end.

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