JP2014115885A - Heat absorbing mat and protective cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat absorbing mat which maintains a high cooling effect and operability for a placed heat generating device such as a notebook computer and which achieves the reduction in thickness.SOLUTION: A heat absorbing mat 10 arranged under a heat generating device comprises: a foundation part 11 for supporting legs of the placed heat generating device; and a heat absorber 12 absorbing heat from a bottom of the heat generating device. The heat absorber 12 is arranged in a state of protruding from an upper surface of the foundation part 11 by a predetermined height. The foundation part 11 is made of an elastic member having a through hole in the vicinity of the center, and the heat absorber 12 is formed by arranging a heat absorbing member in the through hole. For example, if a viscoelastic gel having a heat absorbing property is used as the heat absorbing member, the viscoelastic gel adheres to the bottom of the heat generating device so that heat absorbing is efficiently performed. The viscoelastic gel also protects the heat generating device from a shock applied to a desk due to its shock absorbing property.

Description

  The present invention relates to an endothermic mat that mitigates the temperature rise of an exothermic device, and more particularly, to an endothermic mat that prevents performance deterioration due to heat generation that occurs when a digital electronic device such as a notebook computer is used.

  With the widespread use of LAN and the Internet, computerization of all office work is progressing. In recent years, with the establishment of a personal computer usage environment, the shift from a stationary desktop personal computer to a notebook personal computer that can be easily carried and put away without taking up space is rapidly progressing. As a result, dozens to hundreds of notebook computers are placed on the work desk in the office.

  Notebook PCs have convenient and sufficient functions, but some of the cooling functions have been removed to reduce the size and weight, causing problems such as overheating and reduced performance when used for a long time. There is. In view of such a current situation, development of a tool for assisting a cooling function of a notebook personal computer is underway.

  As such a tool, an underlay mat for a notebook computer has been developed. Patent Document 1 discloses a method of enhancing the cooling effect by accelerating the flow of air below the notebook computer by arranging a sheet material such as a knit material that is hollow inside between the notebook computer and the desk. ing. Further, Patent Document 2 discloses a ventilation gap forming sheet having a mesh-like opening on a contact surface with a notebook computer and providing a ventilation path inside for the purpose of obtaining the same effect. .

  Patent Document 3 discloses a sheet that performs cooling by absorbing heat instead of cooling by forming a ventilation path. The sheet disclosed in Patent Document 3 is characterized by having a structure in which a fluid endothermic agent is sealed inside a flat case formed of a flexible film.

JP 2002-366261 A JP 2007-65851 A Utility Model Registration No. 3075690

  In order to obtain a sufficient cooling effect in the sheets disclosed in the above-mentioned prior art documents 1 and 2, it is necessary to secure a cavity as a ventilation path to improve air permeability, and as a result, the thickness of the sheet is greatly increased. There is a problem of end.

  Although the sheet described in the above-mentioned prior art document 3 solves this problem, it is composed of a flexible film enclosing a fluid endothermic agent in order to improve adhesion. There was a problem that the notebook PC placed on the sheet became unstable and the operability of the keyboard was lowered.

  In view of the above-described conventional problems, an object of the present invention is to provide an endothermic mat and a protective cover that have a reduced thickness while maintaining a high cooling effect and operability.

The endothermic mat of the present invention is an endothermic mat installed below the heat generating device, and includes at least the following components.
(1) A base part that supports legs of the heat generating device to be placed;
(2) An endothermic portion that is disposed in a state of protruding a predetermined height from the upper surface of the base portion and absorbs heat from the bottom surface of the heat generating device.

Moreover, the protective cover of this invention is a protective cover attached to the notebook personal computer with which the main body and the display are connected so that rotation is possible, Comprising: At least the following components are provided.
(1) An elastic member that supports leg portions respectively disposed at the four corners of the bottom surface of the main body of the notebook personal computer to be placed, and is disposed in a state protruding from the upper surface of the elastic member by a predetermined height. An endothermic member that absorbs heat from the bottom of the main body of the first cover portion,
(2) A second cover portion including an elastic member attached to the back surface of the display.

  According to the present invention, it is possible to provide an endothermic mat and a protective cover with reduced thickness while maintaining a high cooling effect and operability.

1 is an external view of an endothermic mat according to Embodiment 1. FIG. FIG. 6 is a six-sided view of the endothermic mat according to the first embodiment. It is a figure which illustrates typically a heat absorption mat interposed between a work desk and notebook PC absorbs a shock. 6 is a six-sided view of an endothermic mat according to a modification of Embodiment 1. FIG. It is sectional drawing of the center vicinity of the y direction (longitudinal direction) of the thermal absorption mat which concerns on Embodiment 2. FIG. It is sectional drawing of the center vicinity of the y direction (longitudinal direction) of the heat absorption mat | matte which concerns on Embodiment 3. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, parts denoted by the same reference numerals have substantially the same functions. For the sake of clarification of the invention, explanation of overlapping parts is omitted as appropriate.

(Embodiment 1)
The heat absorbing mat according to the first embodiment stably supports the heat generating device to be placed and absorbs heat generated by the heat generating device. The heat generating device is a device that generates heat when in use, for example, a digital electronic device.

  In the first embodiment, the heat generating device is specifically described as a notebook computer. A notebook personal computer is a digital electronic device in which a main body portion and a display portion are connected in a rotatable state, and includes a heat-generating component such as a CPU (Central Processing Unit) and a battery inside the main body.

  Usually, leg portions having a height of about 0.5 mm to 5 mm are provided in the vicinity of the four corners of the bottom surface of the notebook personal computer so that a space is formed below the bottom surface. The height of the leg varies depending on the type and size of the notebook personal computer. In recent years, the leg is designed to be as low as about 0.5 mm to 3 mm due to the trend toward miniaturization.

  The said leg part is comprised by the rubber | gum member which is a non-slip stopper attached to the bottom face, the projection part etc. which are formed in a part of bottom face. By supporting the notebook PC body with the legs in contact with the desk or the like on which the notebook PC is placed, a space that forms a ventilation path is formed below the bottom surface of the main body, and unnecessary heat generated near the bottom surface is removed from the air. Designed to dissipate heat by convection.

  FIG. 1 is an external view of an endothermic mat 10 according to the first embodiment, and FIG. 2 is a six-sided view of the endothermic mat 10. The endothermic mat 10 includes a base portion 11 that supports legs of a laptop computer that is placed, and an endothermic portion 12 that absorbs heat from the bottom surface of the laptop computer.

  The base portion 11 is composed of a sheet-like elastic member having a through hole near the center, and the heat absorbing portion 12 is disposed in the through hole portion. The elastic member is designed to have a thickness of about 1 mm to 15 mm so as not to impair operability during keyboard operation. More preferably, the thickness is designed to be about 1 mm to 3 mm.

  The elastic member is selected from members having a compression elastic modulus E of 50 to 500 kPa so that the leg portion can be stably supported. As such a member, there is a sponge which is a porous member having countless fine pores inside.

  The base part 11 contacts the leg part of the notebook personal computer to support the notebook personal computer main body and functions as an outer frame of the heat absorbing part 12. Accordingly, in the present specification, the base portion 11 may be referred to as an outer frame portion or a frame portion.

  The heat absorption part 12 is a bottom face of the main body of the notebook personal computer and absorbs heat by coming into contact with the regions inside the four leg parts respectively arranged at the four corners of the bottom face. The heat absorption part 12 is comprised with the heat absorption member which raise | generates the endothermic reaction which absorbs heat from the circumference | surroundings. The heat absorbing member 12 is formed by disposing the heat absorbing member in a through hole portion provided in the center of the base portion 11 with a predetermined height protruding from the upper surface of the base portion 11.

  When the endothermic member comes into contact with the bottom surface of the main body of the notebook computer 20, an endothermic reaction is promoted, and heat generated in the main body of the notebook computer 20 is absorbed by the endothermic member. After the endothermic reaction is completed, the heat absorbed in the vicinity of the contact surface is transmitted to the bottom surface side of the endothermic mat 10 by the thermal conductivity of the endothermic member itself, and is radiated to the outside from there. Since the heat conductivity of the heat absorbing member is higher than the heat conductivity of air, the heat generated in the notebook computer 20 is released from the entire back side of the heat absorbing mat 10 through the heat absorbing member. By forming such a heat conduction path, the notebook computer 20 is continuously cooled.

  The heat absorbing portion 12 protrudes from the top surface of the base portion 11 by a height of about 0.5 mm to 5 mm in accordance with the height of the leg portion of the laptop computer placed so as to absorb heat by contacting the bottom surface of the laptop computer. Designed to be

  It is preferable that the heat absorption part 12 can maintain the state closely_contact | adhered to the notebook personal computer bottom face. This is because, when the heat absorbing portion 12 is in close contact with the bottom surface of the laptop computer having the unevenness, the voids serving as heat resistance are reduced, and the heat absorbing effect is improved. In the first embodiment, the endothermic part 12 is configured by an endothermic member that can be easily deformed so that the base part 11 can support the leg part of the notebook computer while the endothermic part 12 is in close contact with the bottom surface of the notebook computer.

  For example, the endothermic portion 12 satisfies the relationship that the compression elastic modulus E is 50 to 500 kpa, and the value of tan δ = E ″ / E ′, which is the ratio between the storage elastic modulus E ′ and the loss elastic modulus E ″, is 0.5 or more. It is preferable to use an endothermic member. When the value of tan δ is 0.5 or more, it also has a high anti-vibration function against impact and vibration. There exists an endothermic gel as such an endothermic member.

  As the endothermic gel, for example, it is preferable to use a mixed material of a saturated solution and a crystal solution formed by mixing sodium sulfate and bentonite as main components and preparing an appropriate amount of water to hydrate sodium sulfate. The crystals have the property of absorbing and melting 50 Kcal / Kg heat at around 32 ° C. and crystallizing again when the temperature decreases. As described above, the heat-absorbing portion 12 is a heat-conductive sealing bag in which the heat-absorbing gel, which is a constant temperature refrigerant containing sodium sulfate and bentonite as main components and further containing a filler containing carbon fiber, is enclosed.

  The heat-absorbing mat 10 functions as a vibration-proof mat by being composed of the elastic member and the heat-absorbing member having the above-described properties. FIG. 3 shows the notebook computer 20 placed on the desk 30 with the endothermic mat 10 interposed therebetween.

  When the notebook computer 20 is placed on the heat absorbing mat 10, the heat absorbing member protruding from the upper surface of the elastic member by the same height as the legs of the notebook computer 20 comes into contact with the bottom surface of the main body of the notebook computer 20. The heat absorbing member is compressed by the weight of the notebook computer 20 and is in close contact with the bottom surface of the notebook computer 20. When the heat absorbing member is compressed and deformed, the elastic member in a portion in contact with the leg portion of the notebook computer 20 is compressed, and the leg portion is supported by the repulsive force of the elastic member.

Even if vibration or impact is applied to the notebook computer 20 or the desk 30 in this state, the vibration or impact is absorbed by the elastic member or the heat absorbing member, so that the notebook computer 20 is appropriately protected.

  When the keyboard is operated, a force is applied in the vertical direction from the palm placed on the main body of the notebook computer 20 so that the bottom surface of the main body of the notebook computer 20 is brought into close contact with the heat absorbing member, and the leg portion is pressed more strongly against the elastic member and sinks. Therefore, the leg portion is stably supported by the elastic member, and the operability of the keyboard is maintained.

  As described above, according to the heat absorbing mat 10 according to the first embodiment, the base portion 11 disposed so as to surround the heat absorbing portion 12 supports the leg portion of the notebook computer 20 to improve the stability during operation. Can be made.

  Since the conventional heat absorbing mat is composed only of a flat heat absorbing portion, the vicinity of the center of the notebook computer is supported by the heat absorbing portion, while the leg portion of the notebook computer is in a floating state. In this state, if the hand is put on the end of the notebook computer body to operate the keyboard, the notebook computer is wobbled by the rotational moment, and there is a problem that stability and operability are extremely low.

  On the other hand, according to the heat absorbing mat 10 according to the first embodiment, the heat absorbing portion 12 physically supports the vicinity of the center of the bottom surface of the notebook computer body while absorbing heat, and the base portions 11 are provided at the four corners of the bottom surface of the notebook computer body. Support the placed leg. Therefore, it becomes possible to maintain stability and operability.

  Further, the heat absorbing mat 10 according to the first embodiment is characterized in that the base portion 11 is made of an elastic member. When an impact or vibration applied to the notebook computer is applied, the elastic member and the heat absorbing member that are in contact with the notebook computer are deformed according to the applied force, so that the energy of the impact or vibration is absorbed.

  When working in a limited office space, vibrations or shocks caused by human movement or carelessness may be applied to the notebook personal computer, resulting in data corruption of the hard disk or magneto-optical disk. The damage or failure of the laptop during work will cause extremely serious damage, including loss of valuable information before storage. Therefore, as shown in FIG. 3, by using the notebook computer 20 with the heat absorbing mat 10 of the first embodiment having an anti-vibration function as an underlay, even if an abrupt impact or the like is applied, the heat absorbing mat 10 is impacted or the like. Can be absorbed and the notebook personal computer 20 can be appropriately protected.

  In addition, since the base portion 11 having an appropriate thickness is provided as the peripheral portion, even if liquid such as a beverage is spilled on the work desk, the liquid can be dammed on the side surface of the base portion 11, so that the laptop computer is wetted. Can be prevented from being damaged. Here, in order to enhance this effect, it is even better if the base portion 11 and the heat absorbing portion 12 are subjected to a water repellent treatment. It is also preferable to use a water repellent material for the base portion 11 and the heat absorbing portion 12.

  In addition, in the said description, although the heat absorption part 12 demonstrated the case where it was installed in the center of the base part 11 by the positional relationship symmetrical with respect to the base part 11, it is not limited to this. In a notebook personal computer, a CPU can be cited as a component that causes performance degradation due to heat generated by use. However, the notebook personal computer is often placed at a location outside the center of the main body due to the design of the notebook personal computer. Therefore, the heat absorption part 12 may be arranged in a positional relationship that is asymmetrical with respect to the base part 11 in accordance with the position of the CPU. That is, the elastic member constituting the base portion 11 may be configured such that a through hole is provided at a position where the left and right front and rear are asymmetrical and the heat absorbing member is fitted therein.

  In the above description, the case where the endothermic portion 12 is formed by providing a through hole near the center of the elastic member that is the base portion 11 and fitting and fixing the endothermic member is described, but is not limited thereto. Absent.

  For example, the endothermic part 12 may be formed by providing a rectangular recess near the center of the upper surface of the base part 11 and fitting and fixing the endothermic member there. However, in this case, it is preferable to sufficiently reduce the thickness of the elastic member in the recessed portion so that the heat absorbed by the heat absorbing member can be efficiently radiated to the outside.

  From the viewpoint of securing a large capacity as the heat absorbing member and enhancing the cooling effect, a configuration in which a through hole is provided in the elastic member and the heat absorbing member is fitted therein is preferable. Moreover, the endothermic effect can be enhanced by using an endothermic member having a large area so that the insides of the four leg portions of the notebook personal computer are in contact with the entire region. On the other hand, in order to reduce the size and weight of the endothermic mat 10 itself, it is sufficient that the upper surface of the elastic member as the base portion 11 has a width that can support the leg portion. Accordingly, it is preferable that a through hole having a rectangular opening having a larger area than the upper surface area of the elastic member is provided in the elastic member, and the heat absorbing portion 12 is formed by fitting the heat absorbing member therein. .

  In addition, by using a material having thermal conductivity as the elastic member, the heat absorbed by the heat absorbing member can be efficiently radiated to the outside through the heat conductive elastic member.

  Further, in the above description, a through hole having a rectangular opening is provided near the center of the elastic member that is the base portion 11, and the heat absorbing portion 12 is formed by arranging a rectangular parallelepiped heat absorbing member in the through hole portion. However, the present invention is not limited to this. The opening shape of the through-hole may be an elliptical shape, a corrugated shape, or any other shape, and the number of the through-holes may be plural, and a heat-absorbing member 12 having a shape matching the through-hole is fitted into the heat-absorbing portion 12. Can be formed.

  Alternatively, the endothermic member 12 may be formed by dividing the endothermic member into a plurality of small cells and arranging the endothermic member divided into elastic members in a matrix.

  Moreover, as shown in FIG. 4, you may form the base part 11 by joining an elastic member to the both right and left sides of the heat absorption member used as the heat absorption part 12. As shown in FIG. In addition, you may form the base part 11 by joining an elastic member to the front and back both sides of the heat absorption member used as the heat absorption part 12. FIG. Further, the base portion 11 may be formed by joining elastic members to the four corners of the heat absorbing portion 12. However, from the viewpoint of maintaining the shape of the endothermic mat 10, a configuration in which the endothermic member is fitted into an elastic member provided with a through hole as shown in FIGS.

  In the above description, the base portion 11 has been described as having a rectangular parallelepiped shape having a through-hole inside according to the shape of the laptop computer to be placed. However, the present invention is not limited to this. The base portion 11 may be a sheet having a predetermined thickness, and the shape itself is not limited to a rectangular parallelepiped shape.

  Moreover, although the elastic member which comprises the base part 11 demonstrated as what was a sponge elastic body in the said description, it is not limited to this, Elastic members, such as rubber | gum, can be used.

  Moreover, in the said description, although the base part 11 demonstrated as what was comprised from an elastic member, it is not limited to this. For example, a member having no elasticity such as plastic or metal may be used as the base portion 11. By using such a member, the legs of the notebook computer can be stably supported. However, the anti-vibration effect is lower than when an elastic member such as a sponge is used. Moreover, since the leg portion does not sink, the adhesion between the heat absorbing member and the notebook computer is reduced. From such a viewpoint, it is preferable to use an elastic member for the base portion 11.

(Embodiment 2)
FIG. 5 is a cross-section at the center in the y direction of the heat absorbing mat 40 according to the second embodiment. The heat absorbing mat 40 according to the second embodiment includes an elastic member 41, a non-elastic member 42, and a heat absorbing member 43.

  The elastic member 41 and the non-elastic member 42 are laminated, and a through hole is provided near the center of the laminated sheets. The laminated elastic member 41 and non-elastic member 42 function as a base portion that supports the leg portion of the notebook computer. For example, a sponge is used as the elastic member 41 and plastic is used as the non-elastic member 42.

  In the through hole provided near the center of the sheet in which the elastic member 41 and the non-elastic member 42 are laminated, the heat absorbing member 43 is arranged in a state protruding from the upper surface of the elastic member 41 by a predetermined height.

  The heat absorbing member 43 absorbs heat by contacting with the bottom surface of the notebook personal computer. As described in the first embodiment, as the heat absorbing member 43, a heat conductive sealing bag in which an endothermic gel that is a constant temperature refrigerant containing sodium sulfate and bentonite as a main component and further containing a filler containing carbon fiber is enclosed is used. Can be used.

  According to the heat absorbing mat 40 of the second embodiment, the shape of the heat absorbing mat 40 can be maintained by the non-elastic member 42 functioning as a frame. In addition, by adopting a configuration in which the elastic member 41 directly supports and supports the leg portion, the notebook personal computer can be stably supported.

  Note that a metal can be used as the inelastic member 42 instead of plastic. The inelastic member 42 may be a member having a higher compression elastic modulus than the elastic member 42. Moreover, you may form a base part by laminating | stacking the 2nd elastic member which has a low compression elastic modulus on the 1st elastic member which has a high compression elastic modulus. By setting it as such a structure, a high anti-vibration function and a cooling function can be maintained.

(Embodiment 3)
FIG. 6 is a cross-sectional view at the center in the y direction of the heat absorbing mat 50 according to the third embodiment. The heat absorbing mat 50 includes an elastic member 41, a heat absorbing member 43, a base sheet 51, and a heat conductive sheet 52.

  The elastic member 41 functions as a base part that supports the leg part of the laptop computer to be placed. The elastic member 41 supports the leg portion via the thermally conductive sheet 52. The elastic member 41 is, for example, a member such as a sponge that has a compression elastic modulus E of 50 ≦ E ≦ 500 kPa and a value of tan δ satisfying a relationship of 0 <tan δ <0.25.

  The heat absorbing member 43 functions as a heat absorbing portion that absorbs heat from the bottom surface of the notebook computer. The heat absorbing member 43 is in contact with the bottom surface of the main body of the notebook computer via the heat conductive sheet 52. The heat absorbing member 43 is made of a sealed bag filled with an endothermic gel, for example. Filling the endothermic gel so that the heat conductive sheet 52 covering the endothermic member 43 has a height higher than the height of the heat conductive sheet 52 covering the elastic member 51. The amount is adjusted.

  The base sheet 51 is a sheet-like member that is thinner than the elastic member 41, has a high compression elastic modulus, and has thermal conductivity, and constitutes the bottom surface of the endothermic mat 50. A thin sheet-like base sheet 51 is attached to the bottom surface of the elastic member 41 in which the heat absorbing member 43 is fitted in the through hole in the center of the material. In the third embodiment, a thin sheet-like plastic plate is used as the base sheet 51.

  The heat conductive sheet 52 constitutes the upper surface of the heat absorbing mat 50. The heat conductive sheet 52 integrally covers the heat absorbing member 43 and the elastic member 41 which are arranged in a state protruding from the central through hole of the elastic member 41 by a predetermined height. As the heat conductive sheet 52, a thin heat conductive sheet material having hardness and flexibility that hardly causes wrinkles and breakage is used. Further, it is better that the heat conductive sheet 52 is a sheet material having water repellency so as to cope with a case where liquid spills.

  As described above, the heat absorbing mat 50 is formed by laminating the base sheet 51, the elastic member 41, the heat absorbing member 43, and the heat conductive sheet 52 in this order. By providing the base sheet 51, the shape of the heat absorbing mat 50 can be maintained and heat can be dissipated from the back surface. Moreover, the cooling effect with respect to a notebook personal computer can be heightened by providing the heat conductive sheet 52 which covers the elastic member 41 which functions as a base part, and the heat absorption member 43 which functions as a heat absorption part.

(Other embodiments)
In the first to third embodiments, the case where the endothermic mat is used as an underlay mat for a notebook computer has been described. On the other hand, the embodiment of the present invention is not limited to this. For example, the protective cover can be formed using the heat absorbing mat according to the first to third embodiments. When the mobile device to be protected is a laptop computer, the protective cover (laptop computer cover) absorbs unnecessary heat generated by the laptop computer to prevent performance degradation and protect the laptop computer from vibration and shock. To do.

  Usually, in a notebook computer, a main body and a display are connected in a rotatable state. As a protective cover attached to such a notebook personal computer, it can take a foldable form in which a first cover portion that protects the main body portion and a second cover portion that protects the display portion are connected.

  The first cover portion is disposed in a state where the first cover portion protrudes by a predetermined height from the elastic member supporting the leg portions respectively disposed at the four corners of the bottom surface of the main body of the laptop computer to be placed. And a heat absorbing member that absorbs heat from the bottom surface of the main body of the notebook computer. The second cover part is attached to the back of the display and includes an elastic member that protects the display.

  In the case of a tablet computer in which the touch panel display is integrated with a personal computer, the first cover portion is provided with an elastic member attached to the outer peripheral portion of the bottom surface of the tablet computer to be placed, and a predetermined amount than the upper surface of the elastic member. An endothermic member that is disposed in a protruding state and absorbs heat from the bottom surface of the tablet computer. A 2nd cover part is attached in the form which can be attached or detached, or can be opened and closed, and is provided with the elastic member which protects a touchscreen display at the time of accommodation or transportation.

  In addition, it is also possible to take a form such as a notebook computer storage bag or a notebook computer storage case having the heat absorbing mat according to the first to third embodiments.

  In the above description, the heat generating device has been described as a notebook computer including at least a keyboard and a display (display panel). However, the present invention is not limited to this, and a portable terminal device having a touch panel and other input means. And various electronic devices that generate unnecessary heat with use. Also in this case, by interposing the heat absorbing mat of the present invention below the apparatus, it is possible to provide a heat absorbing mat with a reduced thickness while maintaining a high cooling effect and operability.

  The heat absorbing mat of the present invention is a mat that cools a digital electronic device such as a notebook computer due to an endothermic effect, and is therefore sometimes referred to as a cooling mat or a cooling sheet. Further, the heat absorbing mat of the present invention is also a mat that absorbs shock and vibration, and therefore may be referred to as a vibration isolating mat or a vibration isolating sheet. In addition, since it is also a mat that protects a notebook computer from spilled liquid, it may be referred to as a moisture-proof mat or a moisture-proof sheet.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  INDUSTRIAL APPLICABILITY The present invention can be used for an underlay mat for a device that generates heat, such as a notebook personal computer, a protective cover for protecting the device, a storage case, and the like.

DESCRIPTION OF SYMBOLS 10 Endothermic mat 11 Base part 12 Endothermic part 20 Laptop computer 30 Desk 40 Endothermic mat 41 Elastic member 42 Inelastic member 43 Endothermic member 50 Endothermic mat 51 Base sheet 52 Thermally conductive sheet

Claims (11)

An endothermic mat installed below the heating device,
A base that supports the legs of the heat generating device to be placed;
Disposed in a state protruding by a predetermined height from the upper surface of the base portion, and a heat absorbing portion that absorbs heat from the bottom surface of the heating device;
An endothermic mat comprising. The base portion is made of a sheet-like elastic member having a height of 1 mm to 15 mm,
The heat-absorbing part is composed of a heat-absorbing member arranged in the vicinity of the center of the sheet-like elastic member in a state protruding from the upper surface of the sheet-like elastic member by a height of 0.5 mm to 5 mm,
The endothermic mat according to claim 1. The sheet-like elastic member constituting the base portion has a through hole near the center,
The heat absorbing member is disposed in the through hole in a state of protruding from the upper surface of the sheet-like elastic member by a height of 0.5 mm to 5 mm,
The endothermic mat according to claim 2. The through-hole has a rectangular opening having a larger area than the upper surface area of the elastic member, and a rectangular parallelepiped heat-absorbing member having a cross-sectional area substantially the same shape as the opening is fitted into the through-hole to thereby absorb the heat absorption The part is formed,
The endothermic mat according to claim 3. The heat-absorbing member is composed of a sealed bag sealed with a constant-temperature refrigerant containing sodium sulfate and bentonite as main components and further containing a filler containing carbon fiber,
The endothermic mat according to any one of claims 2 to 4. The elastic member is a sponge elastic body having a compression elastic modulus of 50 to 500 kPa,
The endothermic mat according to any one of claims 2 to 5. It further comprises a heat conductive sheet that integrally covers the upper surface of the elastic member and the upper surface of the heat absorbing member,
The endothermic mat according to any one of claims 2 to 6. A sheet-like member that is thinner than the elastic member and has a high compression modulus is attached to the bottom surface of the elastic member,
The endothermic mat according to any one of claims 2 to 7. The heat generating device is a notebook computer in which a main body and a display are connected in a rotatable state.
The base portion supports the four leg portions respectively disposed at the four corners of the bottom surface of the main body of the laptop computer to be placed;
The endothermic part absorbs heat from the bottom surface of the main body of the notebook personal computer by being in close contact with the inner region of the four legs on the bottom surface of the main body,
The endothermic mat according to any one of claims 1 to 8. A protective cover attached to a laptop computer in which the main body and the display are connected in a rotatable state,
An elastic member for supporting the leg portions respectively disposed at the four corners of the bottom surface of the main body of the laptop to be placed;
An endothermic member that is disposed in a state protruding by a predetermined height from the upper surface of the elastic member, and that absorbs heat from the bottom surface of the main body of the notebook computer;
A first cover part comprising:
A second cover part comprising an elastic member attached to the back of the display;
A protective cover having at least A protective cover attached to a tablet computer in which a touch panel display and a computer are integrated,
An elastic member attached to the bottom surface of the tablet computer to be placed;
An endothermic member that is disposed in a state protruding by a predetermined height from the upper surface of the elastic member, and absorbs heat from the bottom surface of the tablet computer main body,
A first cover part comprising:
In a detachable or openable / closable form, it has a second cover part that includes an elastic member that covers the touch panel display,
The said 2nd cover part is attached in the form which can be attached or detached or can be opened and closed, and is provided with the elastic member which protects a touchscreen display at the time of accommodation or transportation.