User device and case

Abstract

A user device that a user may touch. The user device is provided with: a heat source for generating heat; a case body portion covering the heat source; and a polymer-containing heat-storage body attached to the case body portion.

Description

[Technical Field]

[0001] The present disclosure relates to a user device and a case for attachment to the user device. [Background technology]

[0002] For example, there are user devices, such as smartphones, that are used while being touched by the user. Such user devices may have a heat source, such as a semiconductor chip, inside them that generates heat. For this reason, measures are taken to prevent the user device from becoming hot when touched by the user. For example, Patent Document 1 describes a case that is attached to a smartphone that has a heat source. This case is provided with a thermal conductor that transfers heat generated by the smartphone to parts that are not held by the user. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-201580 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, such user devices have tended to generate more heat in heat sources such as semiconductor chips due to increased computational loads, etc. For this reason, there is a demand in this technical field for a configuration that can suppress the sudden release of heat generated in the heat source. [Means for solving the problem]

[0005] One aspect of the present disclosure is a user device that can be touched by a user, comprising a heat source that can generate heat, a case body that covers the heat source, and a polymer-containing heat storage medium attached to the case body.

[0006] In this user device, heat generated by the heat source can be temporarily stored in the polymer-containing thermal storage medium before being released to the outside of the user device through the case main body. The heat stored in the polymer-containing thermal storage medium is then gradually released to the outside of the user device. In this way, in the user device, the polymer-containing thermal storage medium can assist in heat dissipation and can slow the rate of temperature rise associated with heat generation from the heat source. Therefore, the user device can suppress the sudden release of heat generated by the heat source.

[0007] In the user device, the polymer-containing heat storage material may be attached to the heat source side surface of the case body. In this case, the user device can store heat inside the case body, which is not easily touched by the user.

[0008] The user device may be a portable terminal carried by the user. In this case, the portable terminal carried by the user can suppress the sudden release of heat generated in the heat source.

[0009] The user device may be a wearable terminal that is worn on the user's body. In this case, the wearable terminal worn by the user can suppress sudden release of heat generated in the heat source.

[0010] In the user device, the polymer-containing heat storage medium may be attached to a portion of the case body that faces the user's body and to a surface of the case body that faces the heat source. In this case, the wearable terminal as the user device can effectively prevent heat generated in the heat source from being suddenly released to the user's body via the case body.

[0011] The user device may further include a thermal conductor connected to the heat source, and the polymer-containing thermal storage medium may be in contact with the thermal conductor. In this case, even if the heat source and the polymer-containing thermal storage medium are separated from each other, the user device can transfer heat generated in the heat source to the polymer-containing thermal storage medium via the thermal conductor. This allows the user device to effectively store heat in the polymer-containing thermal storage medium.

[0012] Another aspect of the present disclosure is a case attached to a user device that has a heat source capable of generating heat and that can be touched by a user, the case comprising a case main body that covers at least a portion of the user device, and a polymer-containing heat storage body attached to the case main body.

[0013] This case can temporarily store heat generated by the heat source of the user device in the polymer-containing thermal storage medium before dissipating the heat outside the case. The heat stored in the polymer-containing thermal storage medium is then gradually released outside the case. In this way, the polymer-containing thermal storage medium in the case can assist in the heat dissipation of the heat source of the user device and can slow the rate of temperature rise associated with heat generation. Therefore, the case can suppress the sudden release of heat generated by the heat source of the user device. [Effects of the Invention]

[0014] According to various aspects of the present disclosure, the sudden release of heat generated by a heat source can be suppressed. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a front view showing a schematic configuration of a user device according to the first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view of the polymer-containing heat storage medium and its surroundings in a modified example of the first embodiment. [Figure 5] FIG. 5 is an enlarged cross-sectional view of the polymer-containing heat storage medium and its surroundings in a modified example of the first embodiment. [Figure 6] FIG. 6 is a front view showing a schematic configuration of a user device according to the second embodiment. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8]FIG. 8 is a front view showing a schematic configuration of a user device according to the third embodiment. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. [Figure 10] FIG. 10 is a front view showing a schematic configuration of a case according to the fourth embodiment. [Figure 11] FIG. 11 is a cross-sectional view of the case of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and duplicated description will be omitted.

[0017] (First embodiment) As shown in FIGS. 1 to 3, the user device 1 according to the first embodiment is a portable terminal carried by a user. The user device 1 can be touched by the user when carrying or using the device. The user device 1 may be a communication terminal such as a smartphone, a mobile phone, or a mobile router. The user device 1 may be a medical device carried by the user to constantly record measurement results such as the user's heart rate, blood pressure, and electrocardiogram. The type of the user device 1 is not limited as long as it is carried by the user.

[0018] The user device 1 includes a case body 10, a heat source 20, and a polymer-containing heat storage medium 30. The case body 10 is a box-shaped member having an internal storage space. The case body 10 stores the heat source 20 and the polymer-containing heat storage medium 30 therein. That is, the case body 10 covers the heat source 20 and the polymer-containing heat storage medium 30. The material of the case body 10 is not particularly limited.

[0019] The heat source 20 can generate heat. The heat source 20 may be, for example, a semiconductor chip, a display, a light-emitting unit, an electric motor, an electric pump, etc. The heat source 20 is not particularly limited as long as it can generate heat.

[0020] In this embodiment, the heat source 20 is in direct contact with the polymer-containing thermal storage medium 30. This allows the heat generated in the heat source 20 to be directly transferred to the polymer-containing thermal storage medium 30. However, the heat source 20 is not limited to being in direct contact with the polymer-containing thermal storage medium 30. The heat source 20 may be in a floating state above the polymer-containing thermal storage medium 30. In this case, the heat generated in the heat source 20 may be transferred to the polymer-containing thermal storage medium 30 by radiant heat.

[0021] The polymer-containing thermal storage medium 30 can temporarily store the heat generated by the heat source 20. The heat stored in the polymer-containing thermal storage medium 30 is gradually released to the outside of the polymer-containing thermal storage medium 30.

[0022] The polymer-containing heat storage medium 30 is attached to the case main body 10. In this embodiment, the polymer-containing heat storage medium 30 is attached to the inner surface of the case main body 10 (the surface of the case main body 10 facing the heat source 20). The polymer-containing heat storage medium 30 may be attached (fixed) to the case main body 10 with an engaging member such as a screw, or may be attached (attached) with an adhesive or adhesive tape. The polymer-containing heat storage medium 30 may be attached to the case main body 10 in a state where it is in direct contact with the case main body 10. The polymer-containing heat storage medium 30 may be attached to the case main body 10 with another member (for example, a thermal conductor such as a heat pipe, adhesive tape, etc.) sandwiched between the polymer-containing heat storage medium 30 and the case main body 10.

[0023] For example, when a fixing member or the like for fixing the polymer-containing heat storage material 30 is attached to the case main body 10, the polymer-containing heat storage material 30 may be attached to the case main body 10 in a state where it is floating above the case main body 10 by the fixing member or the like. That is, the polymer-containing heat storage material 30 may be attached to the case main body 10 via the fixing member or the like. For example, when the heat source 20 is attached to the case main body 10, the polymer-containing heat storage material 30 may be attached to the heat source 20. That is, the polymer-containing heat storage material 30 may be attached to the case main body 10 via the heat source 20.

[0024] In this embodiment, the polymer-containing heat storage material 30 is formed in a rectangular plate shape. The polymer-containing heat storage material 30 is attached to one flat portion of the inner surface of the case body 10. However, the polymer-containing heat storage material 30 is not limited to being formed in a rectangular plate shape. The polymer-containing heat storage material 30 may also be attached across multiple flat portions of the inner surface of the case body 10. In this embodiment, one flat portion of the polymer-containing heat storage material 30 abuts one flat portion of the heat source 20.

[0025] The polymer-containing thermal storage medium 30 in this embodiment contains at least a polymer. More specifically, the polymer-containing thermal storage medium 30 may be a cured product of a curable composition containing, for example, a polymer including a structural unit represented by the following formula (1-1) and a structural unit represented by the following formula (1-2), and a curing agent. In this case, the polymer has a heat storage property, and thereby the heat storage property of the polymer-containing thermal storage medium 30 is exhibited. [ka] In the formula, R 1 and R 3 each independently represents a hydrogen atom or a methyl group, R 2 represents an alkyl group having 12 to 30 carbon atoms or a monovalent group having a polyoxyalkylene chain, and R 4 represents a monovalent organic group having a hydrogen atom or a reactive group. The reactive group is a group capable of reacting with the above-mentioned curing agent.

[0026] R 2 When R is an alkyl group, the alkyl group may be linear or branched. 2 The number of carbon atoms in the alkyl group represented by R is preferably 12 to 28. 2 When is a group having a polyoxyalkylene chain, the group having a polyoxyalkylene chain may be a group represented by the following formula (2). [ka] In the formula, R a represents an alkylene group having 2 to 4 carbon atoms, n represents an integer of 2 to 90, and R b represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and * represents a bond.

[0027] R 4 The reactive group in R is, for example, at least one group selected from the group consisting of a carboxyl group, a hydroxyl group, a blocked isocyanate group, an amino group, and an epoxy group. 4 The compound may be selected appropriately depending on the type of reactive group in the compound, and may be, for example, an isocyanate compound, a phenol compound, an amine compound, an imidazole compound, an acid anhydride, a carboxylic acid compound, or the like.

[0028] The polymer-containing heat storage material 30 may be, for example, a cured product of a curable composition containing a compound having an isocyanate group and capsules (heat storage capsules) encapsulating a heat storage component. In this case, the heat storage capacity of the polymer-containing heat storage material 30 is exhibited by the heat storage capsules.

[0029] The compound having an isocyanate group may be a diisocyanate having two isocyanate groups in the molecule, such as an aromatic diisocyanate, an aliphatic diisocyanate, or an alicyclic diisocyanate.

[0030] The compound having an isocyanate group may be, for example, a polymer containing a structural unit represented by the above formula (1-1) and a structural unit represented by the following formula (1-3). [ka] In the formula, R 5 represents a hydrogen atom or a methyl group, and R 6 represents a monovalent organic group having an isocyanate group.

[0031] Since this polymer has heat storage properties, in this case the curable composition does not need to contain the heat storage capsules.

[0032] The heat storage capsule has a heat storage component and an outer shell that encapsulates the heat storage component. The heat storage component may be any component that can store heat, for example, a component that has heat storage properties associated with a phase transition.

[0033] The heat storage component in the heat storage capsule may be, for example, an organic compound such as a chain saturated hydrocarbon compound (paraffin hydrocarbon compound), natural wax, petroleum wax, polyethylene glycol, sugar alcohol, etc., or an inorganic compound such as a hydrate of an inorganic compound, an inorganic compound that exhibits a change in crystal structure, etc. The outer shell may preferably be formed from a melamine resin, an acrylic resin, a urethane resin, silica, etc.

[0034] The polymer-containing heat storage medium 30 may be a cured product of a curable composition containing, for example, a compound having a (meth)acryloyl group, a compound having an epoxy group, or a compound having a blocked isocyanate group, a curing agent, and the above-mentioned heat storage capsules. In this case, the heat storage capacity of the polymer-containing heat storage medium 30 is exerted by the heat storage capsules.

[0035] The compound having a (meth)acryloyl group may include, for example, a compound represented by the following formula (3). [ka] In the formula, R 7 represents a hydrogen atom or a methyl group, and R 8 represents a monovalent organic group.

[0036] R 8 The monovalent organic group represented by the formula (I) may be, for example, a hydrocarbon group such as an alkyl group, a cycloalkyl group, or an aromatic hydrocarbon group; a group having a polyoxyalkylene chain, a heterocycle-containing group, a group having an oxygen atom such as an alkoxy group; a group containing a silicon atom such as a group having a silane group or a group having a siloxane bond; or a group containing a halogen atom such as a fluorine atom.

[0037] The compound having a (meth)acryloyl group may be polyacrylic (meth)acrylate, polyurethane (meth)acrylate, polyester (meth)acrylate, polyether (meth)acrylate, polyepoxy (meth)acrylate, or polybutadiene whose terminals are (meth)acrylic-modified.

[0038] When the curable composition contains a compound having a (meth)acryloyl group, the curing agent may be a curing agent (polymerization initiator) that generates radicals when exposed to heat, light, or an anaerobic atmosphere.

[0039] The compound having an epoxy group may be, for example, a compound having an epoxy group and an aromatic ring, or a compound in which the amino group and the hydroxyl group of a compound having one or both of an amino group and a hydroxyl group and an aromatic ring are glycidylated (glycidyl compound).

[0040] When the curable composition contains a compound having an epoxy group, the curing agent may be, for example, at least one selected from the group consisting of a phenol compound, an amine compound, an imidazole compound, and an acid anhydride.

[0041] A compound having a blocked isocyanate group has an isocyanate group blocked (protected) with a blocking agent (protecting group) that can be removed by heat. A compound having a blocked isocyanate group is a compound in which the isocyanate group in the above-mentioned compound having an isocyanate group is protected with a blocking agent.

[0042] When the curable composition contains a compound having a blocked isocyanate group, the curing agent may be, for example, at least one selected from the group consisting of alcohol compounds, amine compounds, and thiol compounds.

[0043] The polymer-containing heat storage medium 30 may be a cured product of a mixture of a first liquid containing the heat storage capsules and the compound having an isocyanate group, and a second liquid containing the heat storage capsules and a curing agent. In this case, the heat storage capacity of the polymer-containing heat storage medium 30 is exerted by the heat storage capsules.

[0044] The polymer-containing heat storage medium 30 may be, for example, a cured product of a mixture of a first liquid containing the heat storage capsules and the compound having an epoxy group, and a second liquid containing the heat storage capsules and a curing agent. In this case, the heat storage properties of the polymer-containing heat storage medium 30 are exerted by the heat storage capsules. The curing agent may be, for example, at least one selected from the group consisting of thiol compounds and amine compounds.

[0045] The polymer-containing heat storage medium 30 may be, for example, a cured product of a mixture of a first liquid containing the heat storage capsules, the compound having a (meth)acryloyl group, and an oxidizing agent, and a second liquid containing the heat storage capsules, the compound having a (meth)acryloyl group, and a reducing agent. In this case, the heat storage capacity of the polymer-containing heat storage medium 30 is exhibited by the heat storage capsules. The oxidizing agent may be, for example, an organic peroxide or an azo compound. The reducing agent may be, for example, a tertiary amine, a thiourea derivative, a transition metal salt, or the like.

[0046] The polymer-containing thermal storage medium 30 may be, for example, a thermal storage medium containing a copolymer of ethylene and an olefin having 3 or more carbon atoms, and at least one thermal storage component selected from the group consisting of linear saturated hydrocarbon compounds and fatty acid esters. The olefin having 3 or more carbon atoms may be, for example, an olefin having 3 to 8 carbon atoms, or may be an olefin having 8 carbon atoms (octene). The polymer-containing thermal storage medium 30 may further contain a gelling agent. The gelling agent may be, for example, at least one selected from the group consisting of carboxylic acids and metal carboxylates.

[0047] As described above, the user device 1 can temporarily store heat generated in the heat source 20 in the polymer-containing thermal storage medium 30 before the heat is released to the outside of the user device 1 via the case main body 10. The heat stored in the polymer-containing thermal storage medium 30 is then gradually released to the outside of the user device 1 (case main body 10). In this way, in the user device 1, the polymer-containing thermal storage medium 30 can assist in the heat dissipation of the heat source 20 and can slow down the rate of temperature rise associated with heat generation by the heat source 20. Therefore, the user device 1 carried by the user can suppress the sudden release of heat generated by the heat source 20. As a result, for example, even if the heat source 20 suddenly generates heat temporarily, the user device 1 can suppress the sudden release of heat generated by the heat source 20 so that the user device 1 does not feel hot when touched by the user.

[0048] The polymer-containing heat storage body 30 is attached to the inner surface of the case body 10. In this case, the user device 1 can store heat inside the case body 10, which is not easily touched by the user.

[0049] The heat source 20 is not limited to being in direct contact with the polymer-containing thermal storage medium 30 as shown in FIG. 2 . For example, the heat source 20 may be in contact (thermally connected) with the polymer-containing thermal storage medium 30 via a thermal conductor 40, as in the user device 1A shown in FIG. 4 . That is, the user device 1A further includes a thermal conductor 40 connected to the heat source 20. The polymer-containing thermal storage medium 30 may be in contact with the thermal conductor 40. The material of the thermal conductor 40 is not particularly limited as long as it is capable of transferring heat between the heat source 20 and the polymer-containing thermal storage medium 30. The thermal conductor 40 may be a strip-shaped heat pipe connecting the heat source 20 and the polymer-containing thermal storage medium 30. The thermal conductor 40 may be a mechanism for dissipating heat generated in the heat source 20. This mechanism for dissipating heat may be a condenser that liquefies gas. The polymer-containing heat storage medium 30 may be in contact with such a heat dissipation mechanism such as a condenser.

[0050] As a result, even when the heat source 20 and the polymer-containing heat storage material 30 are spaced apart, the heat source 20 and the polymer-containing heat storage material 30 are connected to each other so as to be able to transfer heat via the thermal conductor 40. Therefore, the user device 1A can effectively store heat in the polymer-containing heat storage material 30.

[0051] 4, one flat portion of the thermal conductor 40 is in contact with one flat portion of the polymer-containing thermal storage medium 30, but the contact state between the thermal conductor 40 and the polymer-containing thermal storage medium 30 is not limited to this state. For example, the polymer-containing thermal storage medium 30 may be in contact (connected) with the thermal conductor 40 so that one end of the thermal conductor 40 is entirely covered by the polymer-containing thermal storage medium 30.

[0052] 2, one flat portion of the heat source 20 is in contact with one flat portion of the polymer-containing thermal storage medium 30, but the contact state between the heat source 20 and the polymer-containing thermal storage medium 30 is not limited to this state. For example, as in the user device 1B shown in FIG. 5, when the heat source 20 is a semiconductor chip attached to a circuit board 21, the polymer-containing thermal storage medium 30 may be in contact with the heat source 20 so as to cover the entire exposed surface of the heat source 20 (semiconductor chip). In other words, the polymer-containing thermal storage medium 30 may be in contact with the entire portion of the surface of the heat source 20 that is not in contact with the circuit board 21. In this case, the polymer-containing thermal storage medium 30 can further assist in dissipating heat generated in the semiconductor chip (heat source 20).

[0053] 5, a polymer-containing heat storage material 31 may be embedded in the surface of the circuit board 21 that faces the heat source 20 (semiconductor chip). In this case, the polymer-containing heat storage material 31 embedded in the circuit board 21 can also assist in dissipating the heat generated in the heat source 20 (semiconductor chip).

[0054] (Second embodiment) As shown in FIGS. 6 and 7, the user device 2 according to the second embodiment is a wearable terminal worn on the user's body. In this embodiment, the user device 2 is a watch-type wearable terminal worn on the user's wrist. When worn on the user's body, the user device 2 is in contact with the user's body. The user device 2 may be, for example, a communication terminal such as a smartphone or a mobile phone. The user device 2 may be, for example, a medical device worn on the user's body to constantly record measurement results such as the user's heart rate, blood pressure, electrocardiogram, etc. The type of the user device 2 is not limited as long as it is worn on the user's body.

[0055] The user device 2 includes a device main body 2a and a belt 2b. The belt 2b is worn around the user's wrist, causing the device main body 2a to be worn on the user's wrist. The device main body 2a includes a case main body 10A, a heat source 20A, and a polymer-containing heat storage medium 30A.

[0056] The case body 10A accommodates the heat source 20A and the polymer-containing thermal storage medium 30A inside. That is, the case body 10A covers the heat source 20A and the polymer-containing thermal storage medium 30A. The material of the case body 10A is not particularly limited.

[0057] Heat source 20A is capable of generating heat. Heat source 20A may be, for example, a semiconductor chip, a display, a light-emitting unit, an electric motor, an electric pump, etc. Heat source 20A is not particularly limited as long as it is capable of generating heat.

[0058] In this embodiment, the heat source 20A is in direct contact with the polymer-containing thermal storage medium 30A. However, like the heat source 20 in the first embodiment, the heat source 20A is not limited to being in direct contact with the polymer-containing thermal storage medium 30A.

[0059] The polymer-containing thermal storage medium 30A can temporarily store the heat generated by the heat source 20A. The heat stored in the polymer-containing thermal storage medium 30A is then gradually released to the outside of the polymer-containing thermal storage medium 30A.

[0060] The polymer-containing heat storage material 30A is attached to the case main body 10A. In this embodiment, the polymer-containing heat storage material 30A is attached to a portion of the case main body 10A that faces the user's wrist A (the portion that comes into contact with the wrist) and to the inner surface of the case main body 10A (the surface of the case main body 10A facing the heat source 20A). The configuration for attaching the polymer-containing heat storage material 30A to the case main body 10A is the same as the configuration for attaching the polymer-containing heat storage material 30 to the case main body 10 in the first embodiment. Furthermore, the configuration (material) of the polymer-containing heat storage material 30A is the same as the configuration of the polymer-containing heat storage material 30 in the first embodiment.

[0061] As described above, in the user device 2, similar to the user device 1 in the first embodiment, the polymer-containing heat storage medium 30A can assist in the heat dissipation of the heat source 20A, and can also slow the rate of temperature rise associated with heat generation by the heat source 20A. Therefore, the user device 2 worn on the user's body can suppress the rapid release of heat generated by the heat source 20A. As a result, even if the heat source 20A temporarily and suddenly generates heat, the user device 2 can suppress the rapid release of heat generated by the heat source 20A so that the user does not feel hot.

[0062] In the user device 2, the polymer-containing heat storage medium 30A is attached to the portion of the case main body 10A that faces the user's wrist A and to the inner surface of the case main body 10A. In this case, the user device 2 can effectively prevent heat generated in the heat source 20A from being suddenly released to the user's body (wrist A) through the case main body 10A.

[0063] (Third embodiment) 8 and 9, the user device 3 according to the third embodiment is a wearable terminal worn on the body of a user P. In this embodiment, the user device 3 is a head-mounted display worn on the head of the user P. When worn on the head of the user P, the user device 3 is in contact with the body of the user P.

[0064] The user device 3 includes a display main body 3a and a cushion part 3b. The display main body 3a is fixed to the head of the user P by a fixing belt or the like (not shown) so that it is positioned in front of the user P's eyes. The cushion part 3b is attached to the display main body 3a. The display main body 3a abuts against the head of the user P via the cushion part 3b. The display main body 3a includes a case main body 10B, a display (heat source) 20B, and a polymer-containing heat storage body 30B.

[0065] The case body 10B houses the display 20B and the polymer-containing heat storage medium 30B. That is, the case body 10B covers the periphery of the display 20B and the polymer-containing heat storage medium 30B. The material of the case body 10B is not particularly limited. The display surface of the display 20B is exposed from an opening of the case body 10B so that it can be viewed by the user P.

[0066] The display 20B may generate heat when displaying images, etc. The type of the display 20B is not particularly limited.

[0067] In this embodiment, the back surface of the display 20B (the surface opposite to the display surface) is in direct contact with the polymer-containing heat storage material 30B. Note that, like the heat source 20 in the first embodiment, the display 20B is not limited to being in direct contact with the polymer-containing heat storage material 30B.

[0068] The polymer-containing heat storage material 30B can temporarily store the heat generated by the display 20B. The heat stored in the polymer-containing heat storage material 30B is then gradually released to the outside of the polymer-containing heat storage material 30B.

[0069] The polymer-containing heat storage material 30B is attached to the case main body 10B. In this embodiment, the configuration for attaching the polymer-containing heat storage material 30B to the case main body 10B is the same as the configuration for attaching the polymer-containing heat storage material 30 to the case main body 10 in the first embodiment. In addition, the configuration of the polymer-containing heat storage material 30B is the same as the configuration of the polymer-containing heat storage material 30 in the first embodiment.

[0070] As described above, in the user device 3, similar to the user device 1 in the first embodiment, the polymer-containing heat storage material 30B can play a role in assisting heat dissipation from the display 20B, and can also slow down the rate of temperature rise associated with heat generation from the display 20B. Therefore, the user device 3 worn on the head of the user P can suppress the sudden release of heat generated in the display 20B.

[0071] The polymer-containing heat storage medium 30B may be configured to temporarily store heat from another heat source, such as a semiconductor chip, provided in the user device 3, instead of the display 20B.

[0072] Furthermore, the user device is not limited to devices carried or worn by the user, such as the portable terminals and wearable terminals described in the first to third embodiments. The user device may be a device used by the user while placed on a support such as the ground or a table (a device that can be touched).

[0073] For example, the user device may be a medical device that the user can touch. This medical device may be, for example, a blood pressure monitor that is installed on a table and measures the user's blood pressure with the user's arm inserted into a cylindrical pressure unit. In this case, for example, the above-mentioned polymer-containing heat storage material may be provided inside the case main body of the pressure unit through which the user's arm is inserted. This allows, for example, even if heat is generated in the pressure unit's pressure mechanism (e.g., an air pump, etc.), the generated heat can be temporarily stored in the polymer-containing heat storage material before being transferred from the pressure unit to the user's arm. This allows the user device as a blood pressure monitor to suppress the sudden release of heat generated by a heat source such as the pressure unit.

[0074] As described above, the user device may be any of various devices having a heat source. The polymer-containing heat storage medium may be attached to the case body of such a user device having a heat source.

[0075] (Fourth embodiment) Next, an embodiment of a case to be attached to a user device having a heat source capable of generating heat will be described. As shown in Fig. 10 and Fig. 11, a case 4 is attached to a user device 5. The user device 5 is a device that can be touched by a user and is equipped with a heat source 51 that generates heat. The user device 5 can be various devices such as the portable terminals and wearable terminals described in the first to third embodiments. Figs. 10 and 11 show a portable terminal as the user device 5 as an example.

[0076] The case 4 includes a case main body 10C and a polymer-containing heat storage medium 30C. In this embodiment, the case main body 10C is attached to the user device 5 so as to cover the back surface of the user device 5. However, it is sufficient that the case main body 10C covers at least a portion of the user device 5. The material of the case main body 10C is not particularly limited. Furthermore, various configurations can be adopted for attaching (fixing) the case main body 10C to the user device 5.

[0077] The polymer-containing thermal storage medium 30C can temporarily store heat generated by the heat source 51 of the user device 5. The heat stored in the polymer-containing thermal storage medium 30C is then gradually released to the outside of the polymer-containing thermal storage medium 30C.

[0078] The polymer-containing heat storage material 30C is attached to the case main body 10C. In this embodiment, the polymer-containing heat storage material 30C is attached to the surface of the case main body 10C facing the user device 5. The configuration for attaching the polymer-containing heat storage material 30C to the case main body 10C is the same as the configuration for attaching the polymer-containing heat storage material 30 to the case main body 10 in the first embodiment. In addition, the configuration of the polymer-containing heat storage material 30C is the same as the configuration of the polymer-containing heat storage material 30 in the first embodiment.

[0079] In this embodiment, when the case 4 is attached to the user device 5, the polymer-containing heat storage body 30C may be in contact with the case main body 10C of the user device 5, or may be spaced apart from the case main body 10C.

[0080] As described above, the case 4 attached to the user device 5 can temporarily store heat generated by the heat source 51 of the user device 5 in the polymer-containing thermal storage medium 30C before the heat is released to the outside of the case 4. The heat stored in the polymer-containing thermal storage medium 30C is then gradually released to the outside of the case 4. In this way, in the case 4, the polymer-containing thermal storage medium 30C can assist in the heat release of the heat source 51 of the user device 5 and can also slow down the rate of temperature rise associated with heat generation. Therefore, the case 4 can prevent the heat generated by the heat source 51 of the user device 5 from being suddenly released to the outside of the case 4. As a result, even if the heat source 51 of the user device 5 temporarily and suddenly generates heat, the case 4 can prevent the heat generated by the heat source 51 from being suddenly released so that the user touching the case 4 does not feel hot.

[0081] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and various modifications are possible. [Explanation of symbols]

[0082] 1, 1A, 1B, 2, 3, 5...user device, 4...case, 10, 10A, 10B, 10C...case main body, 20, 20A, 51...heat source, 20B...display (heat source), 30, 30A, 30B, 30C...polymer-containing heat storage body, 40...thermal conductor, P...user.

Claims

1. A user device that can be touched by a user, comprising: a heat source capable of generating heat; a case main body that covers the heat source; a polymer-containing heat storage body attached to the case body; Equipped with The polymer-containing thermal storage medium is a cured product of a curable composition containing a polymer including a structural unit represented by the following formula (1-1) and a structural unit represented by the following formula (1-2), and a curing agent. A user device. 【Chemistry 1】 In the formula, R １ and R ３ each independently represents a hydrogen atom or a methyl group, R ２ represents a monovalent group having a polyoxyalkylene chain, R ４ represents a monovalent organic group having a hydrogen atom or a reactive group.

2. A user device that can be touched by a user, comprising: a heat source capable of generating heat; a case main body that covers the heat source; a polymer-containing heat storage body attached to the case body; Equipped with The polymer-containing heat storage medium is a cured product of a curable composition containing a polymer including a structural unit represented by the following formula (1-1) and a structural unit represented by the following formula (1-3), and capsules encapsulating a heat storage component. 【Chemistry 2】 In the formula, R 1 each independently represents a hydrogen atom or a methyl group, and R 2 represents an alkyl group having 12 to 30 carbon atoms or a monovalent group having a polyoxyalkylene chain. 【Transformation 3】 In the formula, R 5 represents a hydrogen atom or a methyl group, and R 6 represents a monovalent organic group having an isocyanate group.

3. A user device that can be touched by a user, comprising: a heat source capable of generating heat; a case main body that covers the heat source; a polymer-containing heat storage body attached to the case body; Equipped with A user device, wherein the polymer-containing heat storage medium is a cured product of a curable composition containing polyurethane (meth)acrylate, a curing agent, and capsules containing a heat storage component.

4. The user device according to any one of claims 1 to 3, wherein the polymer-containing heat storage medium is attached to a surface of the case main body on the heat source side.

5. The user device according to any one of claims 1 to 4, wherein the user device is a mobile terminal carried by the user.

6. The user device according to any one of claims 1 to 3, wherein the user device is a wearable terminal worn on the body of the user.

7. The user device according to claim 6 , wherein the polymer-containing thermal storage medium is attached to a portion of the case body that faces the user's body and to a surface of the case body that faces the heat source.

8. a heat conductor connected to the heat source; A user device according to any one of claims 1 to 7, wherein the polymer-containing thermal mass abuts the thermal conductor.

9. A user device described in any one of claims 1 to 3, wherein a first surface of the polymer-containing heat storage body abuts the heat source, and a second surface of the polymer-containing heat storage body opposite the first surface abuts the case main body.

10. A user device as described in claim 8, wherein a first surface of the polymer-containing heat storage body abuts the thermal conductor, and a second surface of the polymer-containing heat storage body opposite the first surface abuts the case main body portion.

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