WO2017047442A1 - 筐体 - Google Patents
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- Publication number
- WO2017047442A1 WO2017047442A1 PCT/JP2016/076122 JP2016076122W WO2017047442A1 WO 2017047442 A1 WO2017047442 A1 WO 2017047442A1 JP 2016076122 W JP2016076122 W JP 2016076122W WO 2017047442 A1 WO2017047442 A1 WO 2017047442A1
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- WIPO (PCT)
- Prior art keywords
- reinforcing member
- cover
- joined
- bottom cover
- top cover
- Prior art date
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0004—Casings, cabinets or drawers for electric apparatus comprising several parts forming a closed casing
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C13/00—Details; Accessories
- A45C13/36—Reinforcements for edges, corners, or other parts
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C5/00—Rigid or semi-rigid luggage
- A45C5/02—Materials therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/12—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/03—Covers
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
- A45C2011/002—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00 for portable handheld communication devices, e.g. mobile phone, pager, beeper, PDA, smart phone
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
- A45C2011/003—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00 for portable computing devices, e.g. laptop, tablet, netbook, game boy, navigation system, calculator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/05—5 or more layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2200/00—Indexing scheme relating to G06F1/04 - G06F1/32
- G06F2200/16—Indexing scheme relating to G06F1/16 - G06F1/18
- G06F2200/163—Indexing scheme relating to constructional details of the computer
- G06F2200/1633—Protecting arrangement for the entire housing of the computer
Definitions
- the present invention relates to a housing (electronic device housing) containing electronic device parts, a housing such as an attache case and a carry case.
- Patent Document 1 the first casing and the first casing are engaged by engaging a claw provided in the first casing with an engaged portion provided in the second casing.
- 2 describes an invention in which a housing is engaged on a side surface.
- Patent Document 2 describes an invention for enhancing the rigidity of a cabinet structure of an electric device including a resin lower case having upper and lower electric device mounting surfaces and an upper case having a front wall overlapping the upper electric device mounting surface.
- Patent Document 3 describes an invention related to a fiber-reinforced composite material structure in which a first surface having a plurality of convex portions and a second surface of a surface material are joined.
- Patent Document 4 describes an invention relating to a bottom plate of a housing frame of an electric device in which a first member and a second member are overlapped in a box shape so as to be hollow and are joined to each other at the wall surface of each wall portion. Has been.
- JP 2011-22848 A Japanese Patent Laid-Open No. 10-15280 JP2015-13484 A JP 2002-16384 A
- the claw portion and the engaged portion are not bonded and integrated, when the twist is generated by applying a large load, the claw portion or the engaged portion May be damaged, or the housing may be divided into a first housing and a second housing.
- the invention described in Patent Document 1 may have no problem with a small torsional deformation that can keep the engaged state, but when a large torsional deformation such as when it is accidentally dropped is made. The original rigidity cannot be ensured.
- Patent Document 4 since it is coupled with a wall surface and a flat surface, high torsional rigidity can be expressed.
- Patent Document 3 there is a large difference in rigidity between the front side and the back side, and the arrangement method. If a mistake is made, the originally required rigidity cannot be obtained.
- the frustum shape protrudes into the cavity, it is not suitable for thinning in that an electronic component cannot be loaded inside.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a housing capable of improving torsional rigidity while realizing reduction in thickness and weight and improvement in portability.
- the housing according to the first aspect of the present invention includes a bottom surface cover, a top surface cover, a planar portion disposed in a space defined by the bottom surface cover and the top surface cover, and the planar portion.
- a reinforcing member having a standing wall portion erected on the peripheral edge portion, and the standing wall portion of the reinforcing member is a standing wall portion erected on the peripheral edge portion of the bottom cover or the top cover. It is characterized by being joined.
- the housing according to the first aspect of the present invention is the housing according to the above invention, wherein a peripheral portion of the reinforcing member is joined to the bottom cover or the top cover, and at least a part of a region other than the peripheral portion of the reinforcing member.
- the peripheral part of the reinforcing member is joined to the bottom cover or the top cover which is not joined.
- the housing according to the second aspect of the present invention includes a bottom surface cover, a top surface cover, a planar portion disposed in a space defined by the bottom surface cover and the top surface cover, and the planar portion.
- a reinforcing member having a standing wall portion erected on the peripheral edge portion, and the peripheral edge portion of the reinforcing member is joined to the bottom surface cover or the top surface cover, and is provided in a region other than the peripheral edge portion of the reinforcing member. At least a part of the reinforcing member is joined to the bottom cover or the top cover where the peripheral edge of the reinforcing member is not joined.
- the housing according to the present invention is characterized in that, in the above invention, the reinforcing member is bonded to the bottom cover and / or the top cover by heat welding.
- the reinforcing member may peel load 60N / cm 2 or more at 23 ° C., it becomes 5000N / cm 2 within the following range and the peeling force at 200 ° C. It is characterized by being joined to the bottom cover and / or the top cover so as to be within a range of less than 60 N / cm 2 .
- the housing according to the present invention is the housing according to the above invention, wherein the reinforcing member and the bottom cover and / or the top cover to which the reinforcing member is joined are formed of a fiber reinforced composite material, A thermoplastic resin is provided in at least one joint portion with the top cover, and the reinforcing member, the bottom cover, and / or the top cover are joined via the thermoplastic resin. .
- the housing according to the present invention is characterized in that, in the above invention, the reinforcing member and the bottom cover and / or the top cover are directly joined.
- the housing according to the present invention is the heating member disposed on the surface of the reinforcing member in the hollow structure formed by joining the reinforcing member and the bottom cover and / or the top cover in the above invention. It is characterized by providing.
- the housing according to the present invention is characterized in that, in the above invention, another reinforcing member is provided in a hollow structure formed by joining the reinforcing member and the bottom cover and / or the top cover. .
- the housing according to the present invention is characterized in that, in the above-mentioned invention, the another reinforcing member is joined to the bottom cover or the top cover where the inner surface of the reinforcing member and the reinforcing member are joined. To do.
- the housing according to the present invention can improve the torsional rigidity while realizing a reduction in thickness, weight, and portability.
- FIG. 1 is a perspective view showing a configuration of a housing according to the first embodiment of the present invention.
- 2 is an exploded perspective view of the housing shown in FIG.
- FIG. 3 is a cross-sectional view showing the configuration of the reinforcing member shown in FIG.
- FIG. 4 is a cross-sectional view illustrating an example of the configuration of the housing.
- FIG. 5 is a plan view and a cross-sectional view showing the configuration of another reinforcing member.
- FIG. 6 is a schematic diagram illustrating a configuration of a reinforcing member in the housing according to the first embodiment of the present invention.
- FIG. 7 is a cross-sectional view showing the configuration of the reinforcing member in the housing according to the second embodiment of the present invention.
- FIG. 1 is a perspective view showing a configuration of a housing according to the first embodiment of the present invention.
- 2 is an exploded perspective view of the housing shown in FIG.
- FIG. 3 is a cross-sectional view showing the configuration
- FIG. 8 is a schematic diagram for explaining a torsional rigidity test method.
- FIG. 9 is a schematic diagram for explaining a method of a flexural rigidity test.
- FIG. 10 is a schematic diagram for explaining a method of a peeling load test.
- FIG. 11 is a schematic diagram showing the configuration of the laminate.
- FIG. 12 is a schematic diagram for explaining the press molding method.
- FIG. 13 is a schematic diagram illustrating the arrangement of the reinforcing members according to the first embodiment.
- FIG. 14 is a schematic diagram illustrating the arrangement of the reinforcing members according to the fifth embodiment.
- FIG. 15 is a schematic diagram illustrating the arrangement of the reinforcing members according to the sixth embodiment.
- FIG. 16 is a cross-sectional view for explaining that a reinforcing member is thermally welded to the bottom cover of the sixth embodiment using a joining jig.
- FIG. 17 is a schematic diagram illustrating the arrangement of the reinforcing members according to the eighth embodiment.
- FIG. 18 is a schematic diagram illustrating the arrangement of the reinforcing members according to the ninth embodiment.
- FIG. 19 is a schematic diagram illustrating the arrangement of the reinforcing members according to the tenth embodiment.
- the inventors of the present invention have greatly increased the torsional rigidity of the housing by joining the reinforcing member to the housing as compared to the case where the reinforcing member is not joined to the housing. It has been found that it can be improved. It has also been found that by utilizing a hollow structure formed by joining reinforcing members, it is possible to reduce the thickness and weight and improve portability.
- the housing according to the first and second embodiments of the present invention conceived from the above knowledge will be described in detail.
- Examples of the use of the case of the present invention include an attache case, a carry case, an electronic device case containing electronic device parts, and more specifically, speakers, displays, HDDs, notebook computers, mobile phones. , Digital still cameras, PDAs, plasma displays, televisions, lighting, refrigerators, and game machines. Among them, it is preferable for clamshell computers and tablet computers that have high torsional rigidity and require lightweight and thin walls. Used.
- FIG. 1 is a perspective view showing a configuration of a housing according to a first embodiment of the present invention.
- a housing 1 according to the first embodiment of the present invention includes a bottom cover 2 having a rectangular shape in plan view, a reinforcing member 3 joined to the bottom cover 2, and a top surface having a rectangular shape in plan view.
- the cover 4 is provided as a main component.
- the direction parallel to the short sides of the bottom cover 2 and the top cover 4 is in the x direction
- the direction parallel to the long sides of the bottom cover 2 and the top cover 4 is perpendicular to the y direction, the x direction, and the y direction. Is defined as the z direction (vertical direction).
- FIG. 2 is an exploded perspective view of the housing 1 shown in FIG.
- the bottom cover 2 includes a planar portion 21 having a rectangular shape in plan view parallel to the xy plane, and a standing wall portion 22 erected in the + z direction from the peripheral portion of the planar portion 21. I have.
- the thickness of the member forming the bottom cover 2 is desirably in the range of 0.1 mm or more and 0.8 mm or less.
- the elastic modulus of the member forming the bottom cover 2 is desirably in the range of 20 GPa or more and 120 GPa or less.
- the bottom cover 2 is preferably formed of any one of a metal material and a fiber reinforced composite material, and may be formed by combining these. From the viewpoint of expressing high torsional rigidity, the bottom cover 2 is preferably a seamless member formed of the same material. Further, from the viewpoint of productivity, the flat portion 21 having a simple shape is formed using a metal material or a fiber-reinforced composite material having high mechanical properties, and the standing wall portion 22 and the joint portion having a complicated shape are excellent in moldability.
- the resin material may be formed by injection molding or the like.
- a light metal material such as an aluminum alloy, a magnesium alloy, or a titanium alloy.
- Aluminum alloys include Al-Cu A2017, A2024, Al-Mn A3003, A3004, Al-Si A4032, Al-Mg A5005, A5052, A5083, Al-Mg-Si A6061, Examples thereof include A6063 and Al—Zn-based A7075.
- the magnesium alloy include Mg—Al—Zn-based AZ31, AZ61, AZ91, and the like.
- Titanium alloys include alloys added with 11 to 23 types of palladium, alloys added with cobalt and palladium, 50 types ( ⁇ alloy), 60 types ( ⁇ - ⁇ alloy), and 80 types ( ⁇ alloy). -6Al-4V and the like can be exemplified.
- reinforcing fiber used for the fiber-reinforced composite material carbon fiber, glass fiber, aramid fiber, boron fiber, PBO fiber, high-strength polyethylene fiber, alumina fiber, silicon carbide fiber, and the like can be used. A mixture of two or more of them may be used. These reinforcing fibers can be used as fiber structures such as long fibers aligned in one direction, single tow, woven fabric, knit, non-woven fabric, mat, braid and the like.
- Matrix resins include thermosetting resins such as epoxy resins, phenol resins, benzoxazine resins, and unsaturated polyester resins, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate.
- thermosetting resins such as epoxy resins, phenol resins, benzoxazine resins, and unsaturated polyester resins, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate.
- Polyester resins such as phthalate and liquid crystal polyester, polyolefins such as polyethylene (PE), polypropylene (PP) and polybutylene, styrene resins and urethane resins, polyoxymethylene (POM), polyamide (PA), polycarbonate ( PC), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), polyphenylene sulfide (PPS), polyphenylene ether (PPE), modified PPE, polyimide (PI) Polyamideimide (PAI), polyetherimide (PEI), polysulfone (PSU), modified PSU, polyethersulfone (PES), polyketone (PK), polyetherketone (PEK), polyetheretherketone (PEEK), polyether Thermosetting resins such as ketone ketone (PEKK), polyarylate (PAR), polyether nitrile (PEN), phenolic resin, and phenoxy resin can be used.
- POM polyoxymethylene
- PA polyamide
- thermosetting resin From the viewpoint of productivity and mechanical properties, it is desirable to use a thermosetting resin, and it is particularly desirable to use an epoxy resin. From the viewpoint of moldability, it is better to use a thermoplastic resin. Among them, a polyamide resin from the viewpoint of strength, a polycarbonate resin from the viewpoint of impact resistance, a polypropylene resin from the viewpoint of lightness, and a heat resistance viewpoint. It is desirable to use polyphenylene sulfide resin.
- the resin may be used not only as a matrix resin of a fiber reinforced composite material but also as a bottom cover, a top cover, or a reinforcing member made of the resin itself.
- the prepreg composed of the above-described reinforcing fiber and matrix resin as the material of each member.
- the prepreg composed of the above-described reinforcing fiber and matrix resin as the material of each member.
- the reinforcing fiber may be constituted by a laminate of these prepregs.
- the reinforcing member 3 includes a planar portion 31 having a rectangular shape in plan view parallel to the xy plane, and a standing wall portion 32 erected in the ⁇ z direction from the peripheral edge of the planar portion 31.
- FIG. 3 is a cross-sectional view showing the configuration of the reinforcing member 3 shown in FIG.
- the reinforcing member 3 is formed by joining the outer surface of the standing wall portion 32 of the reinforcing member 3 to the inner surface of the standing wall portion 22 of the bottom cover 2, so 21 is joined to the bottom cover 2 with a hollow structure S1 formed between them.
- the standing wall portion 32 of the reinforcing member 3 is desirably surface-joined with the standing wall portions 22 on the four sides of the bottom cover 2.
- the standing wall portion 32 of the reinforcing member 3 is surface-joined to the standing wall portion 22 of the bottom cover 2.
- the standing wall portion is formed on the top cover 4 side
- the outer surface of the standing wall portion 32 of the reinforcing member 3 may be surface joined to the inner surface of the standing wall portion of the surface cover 4.
- the maximum value of the distance (height of the reinforcing member 3 from the plane part 21) h between the plane part 31 of the reinforcement member 3 and the plane part 21 of the bottom cover 2 is in the range of 3 mm or more and 30 mm or less.
- the height h of the reinforcing member 3 is one factor that develops torsional rigidity. For this reason, it is desirable that the height h is large, and it is desirable that the height h is 3 mm or more.
- the maximum value of the height h is less than 3 mm, there is a problem that the effect of the standing wall portion 32 is small in the housing 1 and the original torsional rigidity cannot be expressed.
- the maximum value of the height h is longer than 30 mm, it is necessary to increase the thickness of the standing wall 32, resulting in a problem of an increase in the weight of the housing 1.
- FIG. 4 is a cross-sectional view showing an example of the configuration of the housing.
- heating members D1 and D2 are arranged in a hollow structure S1 formed by joining the reinforcing member 3 and the bottom cover 2 or the top cover 4 together.
- the heating members D1 and D2 are desirably disposed on the surface of the reinforcing member 3 on the hollow structure S1 side.
- the “heat generating member” means a part that generates heat as the electronic device is operated, and particularly indicates a member that increases in temperature by 10 ° C. or more as the electronic device is operated.
- a heat generating member include an LED, a capacitor, an inverter, a reactor element, a thermistor element, a power transistor element, a motor, a CPU, and an electronic board on which these are mounted.
- the present invention preferably includes another reinforcing member in the hollow structure S1 formed between the reinforcing member 3 and the bottom cover 2 or the top cover 4 to which the reinforcing member 3 is joined.
- Another reinforcing member provided in the hollow structure S1 may be bonded only to the bottom cover 2 or the top cover 4, or may be bonded only to the reinforcing member 3.
- another reinforcing member is joined to the inner surface of the reinforcing member 3 and is also joined to the bottom cover 2 or the top cover 4 to which the reinforcing member 3 is joined.
- the inner surface of the reinforcing member 3 means a surface inside the hollow structure S1 in the reinforcing member 3.
- FIG. 5A is a plan view showing the configuration of another reinforcing member
- FIG. 5B is a cross-sectional view taken along line AA of FIG. 5A. As shown in FIGS.
- another reinforcing member 5 is a member arranged so as to extend in the x direction at the center in the y direction of the hollow structure S ⁇ b> 1, and is a flat portion of the bottom cover 2. 21 and the flat portion 31 of the reinforcing member 3.
- the standing wall portion 22 of the bottom cover 2 and the standing wall portion 32 of the reinforcing member 3 and the other reinforcing member 5 are integrated, so that the standing wall portions 22 and 32 of the bottom cover 2 and the reinforcing member 3 are particularly It becomes difficult to deform
- the other reinforcing member 5 is disposed so as to extend in the y direction at the center in the x direction of the hollow structure S1 as long as it is connected to the flat portion 21 of the bottom cover 2 and the flat portion 31 of the reinforcing member 3.
- the member may be a member arranged so as to extend in the diagonal direction of the hollow structure S1.
- the other reinforcing member 5 is preferably arranged so as to pass through a position where the amount of deflection of the flat portion 21 of the bottom cover 2 increases when a load is applied in the thickness direction. May be arranged, and members may cross each other.
- the other reinforcing member 5 be formed of an impact absorbing material having excellent elasticity such as a resin material having an elastomer or a rubber component, a gel, and the like. The effect can also be expressed.
- the reinforcing member 3 is configured by the flat portion 31 and the standing wall portion 32 as shown in FIG. 6A, but the flat portion 31 is formed as shown in FIG.
- the reinforcing member 3 may be configured by a curved member. That is, the standing wall portion 32 may be omitted by using the flat surface portion 31 as a curved member.
- the flat portion 31, the standing wall portion 32, and the joint portion 33 may be included.
- corrugated shape may be formed in the plane part 31 from a viewpoint which raises rigidity, or a viewpoint which utilizes space effectively.
- the reinforcing member 3 is joined to the bottom cover 2, but the reinforcing member 3 is joined to the top cover 4, and the space between the flat surface portion 31 of the reinforcing member 3 and the top cover 4.
- a hollow structure S1 may be formed on the substrate.
- These reinforcing members 3 are not particularly limited, but are desirably members having openings, and the reinforcing members shown in FIGS. 6A to 6C are examples.
- the thickness of the member forming the reinforcing member 3 is preferably in the range of 0.3 mm or more and 1.0 mm or less from the viewpoint of weight reduction and thickness reduction of the housing.
- the elastic modulus of the member forming the reinforcing member 3 is preferably in the range of 20 GPa or more and 120 GPa or less.
- the reinforcing member 3 is preferably formed of any one of the above-described metal material and fiber-reinforced composite material, and the material can be selected according to the purpose of the reinforcing member 3.
- a metal material or fiber reinforced composite material having a high elastic modulus is preferably used from the viewpoint of exhibiting a high reinforcing effect, and a metal material having a high thermal conductivity is preferably used from the viewpoint of heat dissipation.
- the reinforcing member 3 is formed of a fiber reinforced composite material, it is desirable that the reinforcing member 3 is constituted by a laminated body of unidirectional continuous fiber prepregs.
- the ratio of the linear expansion coefficient of the reinforcing member 3 to the linear expansion coefficient of the bottom cover 2 to which the reinforcing member 3 is joined is in the range of 0.1 or more and 10 or less.
- the standing wall portion 32 of the reinforcing member 3 is bonded to the standing wall portion 22 of the bottom cover 2 by heat welding.
- the heat welding method include an insert injection method, an outsert injection method, a vibration welding method, an ultrasonic welding method, a laser welding method, and a hot plate welding method.
- the adhesive surface between the standing wall portion 32 and the standing wall portion 22 has a peeling load at 200 ° C. of less than 60 N / cm 2 .
- the peeling load at 200 ° C. is more preferably 30 N / cm 2 or less.
- this peeling load is less than 60 N / cm 2 at 180 ° C., and that it can be easily peeled off at a lower temperature range, from the viewpoint of dismantling adhesion.
- the reinforcing member may be peeled off when used as a casing due to a temperature rise associated with the operation of the electronic component or the temperature of the usage environment. Therefore, it is desirable that the reinforcing member is bonded with high adhesive strength in the temperature range in which the housing is used, and that it can be easily peeled off in the temperature range where the housing is disassembled. Therefore, the peeling load at 80 °C 60N / cm 2 or more, and more preferably in the 5000N / cm 2 within the following ranges.
- the peeling load at 200 ° C. is desirably as low as possible, and is most desirably 10 N / cm 2 or less.
- the preferred because the lower limit as low peel force at 200 ° C. is not particularly limited, but is preferably 0N / cm 2 or more, because sometimes inferior in handling properties too low, with 1N / cm 2 or more More preferably.
- the bottom cover 2 or the top cover 4 to which the reinforcing member 3 and the reinforcing member 3 are joined is formed of a fiber reinforced composite material, and at least one joint portion of the reinforcing member 3 and the bottom cover 2 or the top cover 4 is formed.
- a thermoplastic resin is provided, and the reinforcing member 3 and the bottom surface cover 2 or the top surface cover 4 are joined via the thermoplastic resin.
- thermoplastic resin As a method of providing the thermoplastic resin at the joint portion, the reinforcing member 3 and the bottom cover 2 to which the reinforcing member 3 is joined using a fiber reinforced sheet (prepreg sheet) using a thermoplastic resin as a matrix resin or the top cover.
- preg sheet a fiber reinforced sheet
- thermoplastic resin as a matrix resin or the top cover.
- a method obtained by molding the face cover 4 may be mentioned. Since the molded body obtained by this method has a high proportion of thermoplastic resin on the surface, it is possible to have a wide adhesion area during bonding, and the degree of freedom of selection of the bonding location is increased. preferable. From the viewpoint of the mechanical properties of each member, it is preferably a fiber-reinforced composite material using a thermosetting resin as a matrix resin.
- thermoplastic resin As a method of providing a thermoplastic resin on such a member, the thermoplastic resin is heated. There is a method in which a melted melt or a solution obtained by dissolving a thermoplastic resin with a solvent is applied to provide the fiber reinforced composite material with the thermoplastic resin.
- a fiber reinforced sheet (prepreg sheet) using a thermosetting resin as a matrix resin is molded and cured, a film or nonwoven fabric made of a thermoplastic resin is laminated on the outermost layer of the fiber reinforced sheet (prepreg sheet). Examples of the method include heating and pressure forming the laminated body.
- the reinforcing member 3 and the bottom cover 2 or the top cover 4 are directly joined.
- a suitable method for directly joining the reinforcing member 3 and the bottom cover 2 or the top cover 4 is made of a thermoplastic resin in the outermost layer of a fiber reinforced sheet (prepreg sheet) using a thermosetting resin as a matrix resin. In this method, a laminate in which a film or a non-woven fabric is laminated on the surface is used, but the thermoplastic resin used here can be selected from the group of thermoplastic resins exemplified as the matrix resin.
- thermoplastic resin having a melting point lower than a molding temperature for molding and curing a fiber reinforced sheet (prepreg sheet) in which the matrix resin is a thermosetting resin.
- preg sheet a fiber reinforced sheet
- fusing point of a thermoplastic resin is not specifically limited, From a viewpoint of expressing the heat resistance at the time of applying the housing
- the form of the thermoplastic resin is not particularly limited, and examples thereof include films, continuous fibers, woven fabrics, particles, and non-woven fabrics. From the viewpoint of handleability during the molding operation, it is preferable to be in the form of a film and non-woven fabric. .
- thermoplastic resin melts at the time of molding, and the thermoplastic resin spreads like a film on the surface of the molded body.
- the thermoplastic resin spreads like a film on the surface of the molded body.
- a thermoplastic resin is provided on both joining members to be joined.
- it is.
- the provided thermoplastic resin it is desirable that the substantially same thermoplastic resin is mutually selected.
- the “disassembling adhesion” includes not only that the reinforcing member 3 can be easily removed but also that it can be re-adhered, and expresses adhesiveness when re-adhering.
- a thermoplastic resin may be added, but it is preferable that the resin can be reattached without increasing the weight of the thermoplastic resin or the like.
- the peeling load upon re-adhesion is preferably 50% or more, more preferably 70% or more of the original peeling load.
- the dismantling adhesion of the present invention joins the properties of thermoplastic resins, the point that the resin melts by heating and the mechanical properties decrease, and the property that solidifies at cooling or room temperature to express the original high mechanical properties. This was achieved by adapting to technology.
- a hole can be formed in the flat portion 31 and the standing wall portion 32 of the reinforcing member 3 as long as the torsional rigidity of the present invention is improved.
- This hole is preferably formed in an arrangement for improving the air flow from the viewpoint of heat dissipation, for example, in the opposing standing wall 32.
- These holes are desirably 30% or less with respect to the surface area of the reinforcing member 3, and more desirably 15% or less from the viewpoint of torsional rigidity.
- the top cover 4 is joined to the peripheral edge of the standing wall 22 of the bottom cover 2.
- the top cover 4 has a smooth plate shape, but may have a plate shape having a curved surface or unevenness.
- the top cover 4 may be the same material and shape as the bottom cover 2, and by adopting such a configuration, the housing 1 having high rigidity with respect to either surface can be obtained.
- the top cover 4 may be an electronic device part such as a liquid crystal display or a keyboard. With such a configuration, the top cover 4 can be applied to a clamshell personal computer or a tablet personal computer.
- the housing 1 according to the first embodiment of the present invention is in a space defined by the bottom cover 2, the top cover 4, the bottom cover 2 and the top cover 4.
- a reinforcing member 3 having a flat surface portion 31 and a standing wall portion 32 erected on the peripheral edge of the flat surface portion 31, and the standing wall portion 32 of the reinforcing member 3 is provided on the bottom cover 2. Or it joins to the standing wall part standingly arranged by the peripheral part of the top cover 4.
- casing which can improve torsional rigidity can be provided, implement
- casing which is the 2nd Embodiment of this invention is demonstrated.
- casing which is the 2nd Embodiment of this invention has the characteristics in the structure of a reinforcement member. Therefore, hereinafter, only the configuration of the reinforcing member in the housing according to the second embodiment of the present invention will be described, and description of other configurations will be omitted.
- FIG. 7 is a cross-sectional view showing the configuration of the reinforcing member in the housing according to the second embodiment of the present invention.
- at least a part of the region other than the peripheral portion of the member 34 is joined to the top cover 4 to which the peripheral portion of the member 34 is not joined.
- at least a part of the peripheral portion of the member 34 and the region other than the peripheral portion are joined to the bottom cover 2 and the top cover 4, respectively.
- the housing 1 according to the second embodiment of the present invention is in a space defined by the bottom cover 2, the top cover 4, the bottom cover 2 and the top cover 4.
- a reinforcing member 3 having an opening, and a peripheral portion of the reinforcing member 3 is joined to the bottom cover 2, and at least a part of a region other than the peripheral portion of the reinforcing member 3 is formed in the reinforcing member 3.
- casing which can improve torsional rigidity can be provided, implement
- the casing according to the present invention may be configured by arbitrarily combining the configurations of the casings according to the first and second embodiments.
- the reinforcing member in the first embodiment may satisfy one or both of the structural requirements of the reinforcing member in the second embodiment, or the reinforcing member in the second embodiment is the first implementation. You may satisfy the structural requirements of the reinforcement member in a form.
- other embodiments, examples, operation techniques, and the like made by those skilled in the art based on the present embodiment are all included in the scope of the present invention.
- Torsional rigidity test As shown in FIG. 8A, one side of the housing 1 is fixed with a U-shaped fixing jig 100, and the other side opposite to the fixed side is a supporting jig. After being fixed to the testing machine while being held at 101, the amount of displacement of the housing 1 when a load of 50 N is applied at a change rate of the angle ⁇ of 1 ° / min as shown in FIG. 8B is measured. The measured value was the torsional rigidity value of the casing.
- An "Instron” (registered trademark) universal testing machine 4201 type (manufactured by Instron) is used as a testing machine, and a support span is set to a specimen thickness of 16 using a three-point bending test jig (indenter diameter 10 mm, fulcrum diameter 10 mm) The bending elastic modulus was measured by setting to double. The test piece was tested under the conditions of a moisture content of 0.1% by mass or less, an atmospheric temperature of 23 ° C., and a humidity of 50% by mass.
- the bottom cover 2 or the top cover 4 of the housing 1 is fixed with a fixing jig 103, and the reinforcing member 3 is fixed with a tension jig 104.
- a tensile load F was applied with each member fixed, and evaluation was performed until the reinforcing member 3 was peeled off or the tensile jig 104 was detached from the reinforcing member 3.
- the adhesion area at this time was calculated by measuring the width and length of the joining surface of the reinforcing member 3 before joining. When joining was made partially, those areas were measured and added together to obtain the joining area.
- the peeling load of the reinforcing member 3 was calculated from the obtained tensile load value and the bonding area.
- the peeling load of the reinforcing member 3 at 200 ° C. was set in the thermostatic chamber together with the jig for fixing the housing 1, and the ambient temperature in the thermostatic bath was raised to 200 ° C. After maintaining the temperature for 10 minutes after the temperature rise, evaluation was performed by applying a tensile load in the same manner as the peeling load test of the reinforcing member 3.
- a titanium alloy Ti-6Al-4V was prepared as material 5. The properties of Material 5 are shown in Table 1 below.
- Example 1 Example 1- (1): Production of bottom cover Seven sheets having a predetermined size were cut out from the material 1. Four of them are cut so that the fiber direction of the prepreg is parallel to the longitudinal direction (x direction in FIG. 1), and the remaining three sheets have the fiber direction in the lateral direction (y direction in FIG. 1). It was made parallel. In this embodiment, the lateral direction (y direction) is 0 °, and as shown in FIG. 11, the prepreg sheet 105a having a fiber direction of 90 ° and the prepreg sheet 105b having a fiber direction of 0 ° are symmetrically laminated. A laminate composed of seven prepreg sheets was obtained.
- a laminate 107 obtained in the pair of molds 106 was disposed.
- the hot platen temperature of the press molding apparatus is set to 150 ° C., and the mold 106 is moved as shown in FIG. did.
- the mold 106 was opened, and the molded product was taken out from the mold 106. Trimming was performed so that the standing wall portion of the obtained molded product had a desired height, and a bottom surface cover was obtained.
- Example 1- (2) Production of top cover A molded product was obtained in the same manner as in Example 1- (1) except that a mold having a smooth shape was obtained. Trimming was performed so that the dimension of the obtained molded product was a desired size, and a top cover was obtained.
- Example 1- (3) Production of reinforcing member A molded product was obtained in the same manner as in Example 1- (1). Trimming was performed so that the joint surface of the obtained molded product had a desired width, and a reinforcing member was obtained.
- Example 1- (4) Production of Case Each member obtained in Example 1- (1) to (3) was joined. At this time, as shown in FIG. 13, the vertical wall (long side) of the bottom cover 2 and the vertical wall (long side) of the reinforcing member 3 were joined to each other by an adhesive. The molding conditions and evaluation results in Example 1 are shown in Table 2 below.
- Example 2 A hot melt resin (HM712 manufactured by Cemedine Co., Ltd.) melted by a 140 ° C. hot melt applicator was applied instead of the adhesive, and the reinforcing members were superposed and weights were placed on top of each other and joined as they were for 3 minutes. A casing was obtained in the same manner as Example 1- (1) to (4) except for the joining method. The molding conditions and evaluation results in Example 2 are shown in Table 2 below.
- Example 3 A casing was obtained in the same manner as in Example 2 except that a reinforcing member having the dimensions shown in Table 2 was molded and used.
- the molding conditions and evaluation results in Examples 3 and 4 are shown in Table 2 below.
- Example 5 The reinforcing members having the dimensions shown in Table 3 are molded and used, and as shown in FIG. 14, the standing wall portion in the lateral direction (short side) of the bottom cover 2 and the standing wall portion in the lateral direction (short side) of the reinforcing member 3. A case was obtained in the same manner as in Example 2 except that was bonded by thermal welding. The molding conditions and evaluation results in Example 5 are shown in Table 3 below.
- Example 6 Thickness made of a copolymerized polyamide resin (“Amilan (registered trademark)” CM8000 manufactured by Toray Industries, Inc.) on the surface of the bottom cover that serves as the joint surface with the reinforcing member and the surface of the reinforcing member that serves as the joint surface with the bottom cover. A film having a thickness of 50 ⁇ m was laminated to obtain a laminate. Using the obtained laminate, as shown in FIG. 15, a reinforcing member and a bottom cover in which a reinforcing member 3 was provided with a margin 33 for bonding to the bottom cover 2 were obtained. A joining jig 109 as shown in FIG.
- Example 16 was used and placed in a press molding apparatus set so that the surface temperature of the joining jig 109 was 180 ° C. and heated and pressurized. After 1 minute, the bottom cover, the reinforcing member, and the joining jig were removed from the press molding apparatus and cooled. After 5 minutes, the joining jig 109 was removed to obtain an integrated product of the bottom cover and the reinforcing member. Thereafter, the top cover was joined using an adhesive in the same manner as in Example 1- (4). The molding conditions and evaluation results in Example 6 are shown in Table 3 below.
- Example 7 As another reinforcing member, 25 sheets of the material 1 were laminated so that the prepreg sheets of 0 ° and the prepreg sheets of 90 ° were alternately laminated so as to have a thickness of 3 mm. In the same manner as in Example 1- (1), heating and pressing were performed with a press molding apparatus to obtain a molded product. The obtained molded product was processed so as to have a width of 7.2 mm, and another reinforcing member having the dimensions shown in Table 3 was obtained. Another reinforcing member obtained was arranged as shown in FIG. 5 and joined with an adhesive, and the others were the same as in Example 2 to obtain a casing. The molding conditions and evaluation results in Example 7 are shown in Table 3 below.
- Example 8 The reinforcing members having the dimensions shown in Table 3 are molded and used. As shown in FIG. 17, the standing wall portion in the horizontal direction (short side) and the standing wall portion in the vertical direction (long side) of the bottom cover 2 and the reinforcing member 3 are used. A casing was obtained in the same manner as in Example 2 except that the standing wall portion in the horizontal direction (short side) and the standing wall portion in the vertical direction (long side) were joined by thermal welding. The molding conditions and evaluation results in Example 8 are shown in Table 3 below.
- Example 9 The reinforcing member having the dimensions shown in Table 4 was molded and used, and the casing was made in the same manner as in Example 2 except that the flat surface portion 31 of the reinforcing member 3 was planarly bonded to the top cover 4 as shown in FIG. Got.
- the molding conditions and evaluation results in Example 9 are shown in Table 4 below.
- Example 10 A reinforcing member having the dimensions shown in Table 4 is molded and used, except that the reinforcing member 3 is provided with a margin 33 for bonding to the bottom cover 2 and the upper portion of the reinforcing member 3 is joined to the top cover 4 as shown in FIG. Obtained a housing in the same manner as in Example 6.
- the molding conditions and evaluation results in Example 10 are shown in Table 4 below.
- Example 11 A reinforcing member having the dimensions shown in Table 4 is molded and used, and the flat portion 31 of the reinforcing member 3 is joined to the top cover 4 as shown in FIG. A casing was obtained in the same manner as in Example 2 except that the standing wall portion and the standing wall portion in the longitudinal direction (long side) of the reinforcing member 3 were joined by heat welding.
- the molding conditions and evaluation results in Example 11 are shown in Table 4 below.
- Example 12 A case was obtained in the same manner as in Example 2 except that the materials shown in Table 4 were used as the bottom cover, the hot platen temperature was 220 ° C., and the molding pressure was 10 MPa.
- the molding conditions and evaluation results in Example 12 are shown in Table 4 below.
- Example 13 A case was obtained in the same manner as in Example 2 except that the materials shown in Table 4 were used as the bottom cover, the hot platen temperature was 200 ° C., and the molding pressure was 10 MPa.
- the molding conditions and evaluation results in Example 13 are shown in Table 5 below.
- Example 14 A case was obtained in the same manner as in Example 2 except that the materials shown in Table 4 were used as the bottom cover, the hot platen temperature was 240 ° C., and the molding pressure was 10 MPa. The molding conditions and evaluation results in Example 14 are shown in Table 5 below.
- Example 15 A casing was obtained in the same manner as in Example 2 except that the materials shown in Table 4 were used as the bottom cover. The molding conditions and evaluation results in Example 15 are shown in Table 5 below.
- Example 16 A casing was obtained in the same manner as in Example 2 except that the reinforcing member shown in Table 5 was molded and used. The molding conditions and evaluation results in Example 16 are shown in Table 5 below.
- Example 17 A casing was obtained in the same manner as in Example 2 except that the bottom cover and the top cover described in Table 6 were used. The molding conditions and evaluation results in Example 17 are shown in Table 6 below.
- Example 18 A casing was obtained in the same manner as in Example 2 except that the reinforcing member shown in Table 6 was molded and used. The molding conditions and evaluation results in Example 18 are shown in Table 6 below.
- Example 19- (1) Production of Bottom Cover Using a laminate in which 10 materials 6 were laminated, a press molding apparatus, and a pair of molds 106 as shown in FIG. The laminate was placed. At this time, the hot platen temperature of the press molding apparatus was set to 260 ° C., and pressurization was performed while the molding pressure was maintained at 1.0 MPa. After 10 minutes, cooling water was passed through the hot platen of the press molding apparatus to start cooling. After the temperature of the mold 106 became 100 ° C. or lower, the mold 106 was opened and the molded product was taken out from the mold 106. Trimming was performed so that the standing wall portion of the obtained molded product had a desired height, and a bottom surface cover was obtained.
- Example 19- (2) Production of reinforcing member and top cover Except that the mold used was changed so as to have the dimensions shown in Table 6, the reinforcing member and the top cover were the same as in Example 19- (1). I got the top cover.
- Example 19- (3) Production of casing The obtained bottom cover and the reinforcing member were superposed on a joining form, and joined using an ultrasonic welding machine. Thereafter, the top cover was joined using an adhesive in the same manner as in Example 1- (4).
- the molding conditions and evaluation results in Example 19 are shown in Table 6 below.
- Reference Example 1 A casing was obtained in the same manner as in Example 2 except that the reinforcing member shown in Table 6 was molded and used, and a liquid crystal display was prepared as a top cover. The molding conditions and evaluation results in Reference Example 1 are shown in Table 6 below.
- Comparative Example 1 A casing was obtained in the same manner as in Example 1 except that the reinforcing member was not used.
- the molding conditions and evaluation results in Comparative Example 1 are shown in Table 7 below.
- Comparative Example 2 A casing was obtained in the same manner as in Comparative Example 1 except that the laminate in which the material 1 and the material 2 were laminated was used as the material for the bottom cover.
- the molding conditions and evaluation results in Comparative Example 2 are shown in Table 7 below.
- Comparative Examples 3 and 4 A case was obtained in the same manner as in Example 1 except that the dimensions were as shown in Table 7 and the members were joined on a plane. The molding conditions and evaluation results in Comparative Examples 3 and 4 are shown in Table 7 below.
- Examples 1 and 2 exhibit a very high torsional rigidity and a high ratio of the hollow structure, so that a lot of electronic devices can be mounted inside the hollow structure, which is suitable for thinning and weight reduction. It was a housing.
- Example 7 there was also an effect of another reinforcing member, and it was confirmed that not only torsional rigidity but also flexural rigidity was exhibited.
- Examples 2 to 19 since the top cover and the reinforcing member are joined by heat welding, the joint can be disassembled by heating while exhibiting high torsional rigidity and flexural rigidity. From the viewpoint of In Examples 6 and 10, since the reinforcing member and the bottom cover are directly joined, there is little increase in weight compared to the case of using an adhesive or hot melt resin, which is preferable from the viewpoint of weight reduction. .
- Examples 12 to 14 exhibited not only high torsional rigidity but also flexural rigidity by using a metal material with high mechanical properties of the bottom cover. Moreover, since it is also a material with high heat conductivity, it is preferable also from a viewpoint of thermal characteristics.
- Example 15 is preferable from the viewpoint of enabling radio wave communication as well as high torsional rigidity because a non-conductive material having electromagnetic wave permeability is used for the bottom cover.
- Examples 17 and 18 are intended to reduce the thickness of each member, and contribute to a reduction in weight and a reduction in thickness of the housing while maintaining torsional rigidity. In Example 19, a resin material was used for each member, and it was confirmed that the torsional rigidity was developed although the bending rigidity was inferior.
- Comparative Examples 1 and 2 were very weak against torsion and the internal electronic components could be damaged. Moreover, although the comparative examples 3 and 4 also used the reinforcing member, it did not satisfy the requirements of the present invention, and it was impossible to develop satisfactory torsional rigidity.
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Abstract
Description
始めに、図1から図6を参照して、本発明の第1の実施形態である筐体について説明する。
次に、図7を参照して、本発明の第2の実施形態である筐体について説明する。なお、本発明の第2の実施形態である筐体は、補強部材の構成に特徴を有している。そこで、以下では、本発明の第2の実施形態である筐体における補強部材の構成についてのみ説明し、その他の構成の説明は省略する。
(1)ねじり剛性試験
図8(a)に示すように筐体1の1辺をコの字型の固定治具100で固定し、固定した1辺に対向するもう一方の辺を支持治具101で保持する形で試験機に固定した後、図8(b)に示すように角度θの変化速度を1°/minとして50Nの荷重を付与した時の筐体1の変位量を測定し、測定値を筐体のねじり剛性値とした。
図9に示すように、補強部材が接合された底面カバー2または天面カバー4側から荷重Fを付与できるように筐体を試験機に設置した。試験機として“インストロン”(登録商標)万能試験機4201型(インストロン社製)を用いた。直径20mmの圧子102を用いて筐体1の中心位置をクロスヘッド速度1.0mm/minで押し、100Nの荷重Fを付与したときの底面カバー2または天面カバー4のたわみ量を測定し、測定値をたわみ剛性値とした。
ASTM D-790(1997)の規格に準拠し、補強部材3、底面カバー2、および天面カバー4に用いる材料の曲げ弾性率を評価した。実施例または比較例により得られた各部材からそれぞれ、幅25±0.2mm、厚みDとスパンの関係がL/D=16となるように、長さをスパンL+20±1mmの曲げ試験片を、任意の方向を0°方向とした場合に、0°、+45°、-45°、90°方向の4方向について切り出して試験片を作製した。それぞれの方向について測定回数nは5回とし、全ての測定値(n=20)の平均値を曲げ弾性率とした。試験機として“インストロン”(登録商標)万能試験機4201型(インストロン社製)を用い、3点曲げ試験冶具(圧子直径10mm、支点直径10mm)を用いて支持スパンを試験片厚みの16倍に設定し、曲げ弾性率を測定した。試験片の水分率0.1質量%以下、雰囲気温度23℃、および湿度50質量%の条件下において試験を行った。
JIS K6849(1994)に規定される「接着剤の引張接着強さ試験方法」に基づいて補強部材の引き剥がし荷重を評価した。本試験における試験片は、実施例または比較例で得られる筐体を用いた。この時、補強部材の引き剥がし強度を測定するために、補強部材が接合されていない天面カバーまたは底面カバーがない状態(接合される前)で評価を行った。具体的には、図10に示すように筐体1の底面カバー2または天面カバー4を固定治具103で固定し、補強部材3を引張治具104で固定した。そして、各部材を固定した状態のまま引張荷重Fを付与し、補強部材3が剥がれるまたは引張治具104が補強部材3から外れるまで評価を行った。この時の接着面積は、接合前の補強部材3の接合面の幅や長さを測定して算出した。接合が部分的になされている場合は、それらの面積を測定し、合算して接合面積とした。得られた引張荷重値と接合面積から補強部材3の引き剥がし荷重を算出した。また、200℃における補強部材3の引き剥がし荷重は、筐体1を固定する治具ごと恒温槽内に設置し、恒温槽内の雰囲気温度を200℃まで昇温した。昇温後、10分間その状態を保持した後、補強部材3の引き剥がし荷重試験と同様に引張荷重を付与し、評価を行った。
評価に用いた材料を以下に示す。
東レ(株)製“トレカ”プリプレグP3252S-12を材料1として準備した。材料1の特性は以下の表1に示す。
スーパーレジン工業(株)製SCF183 EP-BL3を材料2として準備した。材料2の特性は以下の表1に示す。
アルミニウム合金A5052を材料3として準備した。材料3の特性は以下の表1に示す。
マグネシウム合金AZ31を材料4として準備した。材料4の特性は以下の表1に示す。
チタン合金Ti-6Al-4Vを材料5として準備した。材料5の特性は以下の表1に示す。
ポリアミド6樹脂(東レ(株)製“アミラン”(登録商標)CM1021T)90質量%と、ポリアミド6/66/610からなる3元共重合ポリアミド樹脂(東レ(株)製“アミラン”(登録商標)CM4000)10質量%とからなるマスターバッチを用いて、目付124g/m2の熱可塑性樹脂フィルムを作製し、材料6として準備した。材料6の特性は以下の表1に示す。
実施例1-(1):底面カバーの作製
材料1から所定の大きさを有するシートを7枚切り出した。このうち4枚は、プリプレグの繊維方向が縦方向(図1でいうx方向)と平行となるようにしてカットし、残りの3枚は繊維方向が横方向(図1でいうy方向)と平行となるようにした。本実施例においては、横方向(y方向)を0°とし、図11に示すように、繊維方向が90°のプリプレグシート105aと繊維方向が0°のプリプレグシート105bとの対称積層となるように7枚のプリプレグシートからなる積層体を得た。
得られる成形品の形状が平滑となる金型を用いること以外は、実施例1-(1)と同様にして成形品を得た。得られた成形品の寸法が所望の大きさとなるようにトリミングを行い、天面カバーを得た。
実施例1-(1)と同様にして成形品を得た。得られた成形品の接合面が所望の幅となるようにトリミングを行い、補強部材を得た。
実施例1-(1)~(3)で得た各部材を接合した。この際、図13に示すように底面カバー2の縦方向(長辺)の立ち壁部と補強部材3の縦方向(長辺)の立ち壁部とを接着剤により接合した。実施例1における成形条件および評価結果は以下の表2に示す。
接着剤ではなく140℃のホットメルトアプリケーターで溶融させたホットメルト樹脂(セメダイン(株)製HM712)を塗布し、補強部材を重ね合わせ上から錘を乗せ、3分間そのままの状態として接合した。接合の方法以外は、実施例1-(1)~(4)と同様にして、筐体を得た。実施例2における成形条件および評価結果は以下の表2に示す。
表2に記載の寸法の補強部材を成形して用いること以外は、実施例2と同様にして、筐体を得た。実施例3,4における成形条件および評価結果は以下の表2に示す。
表3に記載の寸法の補強部材を成形して用い、図14に示すように底面カバー2の横方向(短辺)の立ち壁部と補強部材3の横方向(短辺)の立ち壁部とを熱溶着によって接合した以外は、実施例2と同様にして、筐体を得た。実施例5における成形条件および評価結果は以下の表3に示す。
底面カバーの補強部材との接合面となる側の面および補強部材の底面カバーとの接合面となる面に共重合ポリアミド樹脂(東レ(株)製“アミラン(登録商標)”CM8000)からなる厚み50μmとなるフィルムを積層して積層体を得た。得られた積層体を用いて、図15に示すように補強部材3に底面カバー2との接着しろ33を設けた補強部材および底面カバーを得た。図16に示すような接合用治具109を用い、接合用治具109の表面温度が180℃となるように設定したプレス成形装置の中に配置して加熱・加圧した。1分後、底面カバー、補強部材、および接合用治具をプレス成形装置から取り出し冷却した。5分後、接合用治具109を取り外して底面カバーと補強部材の一体化品を得た。その後、実施例1-(4)と同様にして天面カバーを接着剤を用いて接合した。実施例6における成形条件および評価結果は以下の表3に示す。
別の補強部材として、材料1を厚み3mmとなるように0°のプリプレグシートと90°のプリプレグシートを交互に対称積層となるように25枚積層した。実施例1-(1)と同様にしてプレス成形装置で加熱・加圧を行い、成形品を得た。得られた成形品を幅7.2mmとなるように加工を行い、表3に記載の寸法となる別の補強部材を得た。得られた別の補強部材を図5に示すように配置して接着剤で接合し、その他は、実施例2と同様にして、筐体を得た。実施例7における成形条件および評価結果は以下の表3に示す。
表3に記載の寸法の補強部材を成形して用い、図17に示すように底面カバー2の横方向(短辺)の立ち壁部および縦方向(長辺)の立ち壁部と補強部材3の横方向(短辺)の立ち壁部および縦方向(長辺)の立ち壁部とを熱溶着によって接合した以外は、実施例2と同様にして、筐体を得た。実施例8における成形条件および評価結果は以下の表3に示す。
表4に記載の寸法の補強部材を成形して用い、図18に示すように補強部材3の平面部31を天面カバー4に平面接合した以外は、実施例2と同様にして、筐体を得た。実施例9における成形条件および評価結果は以下の表4に示す。
表4に記載の寸法の補強部材を成形して用い、図19に示すように補強部材3に底面カバー2との接着しろ33を設け、補強部材3の上部を天面カバー4に接合した以外は、実施例6と同様にして、筐体を得た。実施例10における成形条件および評価結果は以下の表4に示す。
表4に記載の寸法の補強部材を成形して用い、図18に示すように補強部材3の平面部31を天面カバー4に平面接合し、さらに底面カバー2の縦方向(長辺)の立ち壁部と補強部材3の縦方向(長辺)の立ち壁部とを熱溶着によって接合した以外は、実施例2と同様にして、筐体を得た。実施例11における成形条件および評価結果は以下の表4に示す。
底面カバーとして、表4に記載の材料を用い、熱盤温度を220℃、成形圧力を10MPaとする以外は、実施例2と同様にして、筐体を得た。実施例12における成形条件および評価結果は以下の表4に示す。
底面カバーとして表4に記載の材料を用い、熱盤温度を200℃、成形圧力を10MPaとすること以外は、実施例2と同様にして、筐体を得た。実施例13における成形条件および評価結果は以下の表5に示す。
底面カバーとして表4に記載の材料を用い、熱盤温度を240℃、成形圧力を10MPaとすること以外は、実施例2と同様にして、筐体を得た。実施例14における成形条件および評価結果は以下の表5に示す。
底面カバーとして表4に記載の材料を用いること以外は、実施例2と同様にして、筐体を得た。実施例15における成形条件および評価結果は以下の表5に示す。
表5に記載の補強部材を成形して用いた以外は、実施例2と同様にして、筐体を得た。実施例16における成形条件および評価結果は以下の表5に示す。
表6に記載の底面カバーおよび天面カバーを成形して用いた以外は、実施例2と同様にして、筐体を得た。実施例17における成形条件および評価結果は以下の表6に示す。
表6に記載の補強部材を成形して用いた以外は、実施例2と同様にして、筐体を得た。実施例18における成形条件および評価結果は以下の表6に示す。
実施例19-(1):底面カバーの作製
材料6を10枚積層した積層体とプレス成形装置と図12(a)に示すような一対の金型106を用い、一対の金型106内に積層体を配置した。このとき、プレス成形装置の熱盤温度が260℃となるように設定しており、成形圧力1.0MPaを保持した状態で加圧した。そして、10分後、プレス成形装置の熱盤に冷却水を流し、冷却を開始した。金型106の温度が100℃以下となってから、金型106を開放し、成形品を金型106から取り出した。得られた成形品の立ち壁部が所望の高さとなるようにトリミングを行い、底面カバーを得た。
表6に記載の寸法となるように用いる金型を変更した以外は、実施例19-(1)と同様にして、補強部材および天面カバーを得た。
得られた底面カバーおよび補強部材を接合形態に重ね合わせ、超音波溶着機を用いて接合を行った。その後、実施例1-(4)と同様にして天面カバーを接着剤を用いて接合した。実施例19における成形条件および評価結果は以下の表6に示す。
表6に記載の補強部材を成形して用い、天面カバーとして液晶ディスプレイを準備した以外は、実施例2と同様にして、筐体を得た。参考例1における成形条件および評価結果は以下の表6に示す。
補強部材を用いないこと以外は、実施例1と同様にして、筐体を得た。比較例1における成形条件および評価結果は以下の表7に示す。
材料1と材料2を積層した積層体を底面カバーの材料として用いること以外は、比較例1と同様にして、筐体を得た。比較例2における成形条件および評価結果は以下の表7に示す。
表7に記載の寸法とし、平面において部材を接合すること以外は、実施例1と同様にして、筐体を得た。比較例3,4における成形条件および評価結果は以下の表7に示す。
実施例で得られた筐体は、高いねじり剛性を発現することが確認された。中でも、実施例1,2は、非常に高いねじり剛性を発現しつつ、中空構造の割合が高いため、中空構造の内部に電子機器などを多く搭載可能であり、薄型化および軽量化に適した筐体であった。実施例7は、別の補強部材の効果もあり、ねじり剛性のみならず、たわみ剛性も発現することが確認された。実施例2~19は熱溶着により天面カバーと補強部材が接合されているため、高いねじり剛性やたわみ剛性を発現しつつ、加熱により接合部を解体することが可能であるため、修理やリサイクルの観点で好ましい。また、実施例6,10は、補強部材と底面カバーとが直接接合されているため、接着剤やホットメルト樹脂などを用いた場合と比較して重量の増加が少なく、軽量化の観点から好ましい。
2 底面カバー
3 補強部材
4 天面カバー
5 別の補強部材
21 平面部
22 立ち壁部
31 平面部
32 立ち壁部
Claims (10)
- 底面カバーと、天面カバーと、前記底面カバーと前記天面カバーとによって区画された空間内に配置された、平面部と、前記平面部の周縁部に立設された立ち壁部と、を有する補強部材と、を備え、
前記補強部材の立ち壁部が、前記底面カバーまたは前記天面カバーの周縁部に立設された立ち壁部に接合されていることを特徴とする筐体。 - 前記補強部材の周縁部が、前記底面カバーまたは前記天面カバーに接合され、前記補強部材の周縁部以外の領域の少なくとも一部が、前記補強部材の周縁部が接合されていない前記底面カバーまたは前記天面カバーに接合されていることを特徴とする請求項1に記載の筐体。
- 底面カバーと、天面カバーと、前記底面カバーと前記天面カバーとによって区画された空間内に配置された、平面部と、前記平面部の周縁部に立設された立ち壁部と、を有する補強部材と、を備え、
前記補強部材の周縁部が、前記底面カバーまたは前記天面カバーに接合され、前記補強部材の周縁部以外の領域の少なくとも一部が、前記補強部材の周縁部が接合されていない前記底面カバーまたは前記天面カバーに接合されていることを特徴とする筐体。 - 前記補強部材が、前記底面カバーおよび/または前記天面カバーに熱溶着によって接着されていることを特徴とする請求項1~3のうち、いずれか1項に記載の筐体。
- 前記補強部材は、23℃における引き剥がし荷重が60N/cm2以上、5000N/cm2以下の範囲内になり、且つ、200℃における引き剥がし荷重が60N/cm2未満の範囲内になるように、前記底面カバーおよび/または前記天面カバーに接合されていることを特徴とする請求項1~4のうち、いずれか1項に記載の筐体。
- 前記補強部材および該補強部材が接合されている前記底面カバーおよび/または前記天面カバーが繊維強化複合材料によって形成され、前記補強部材と底面カバーおよび/または天面カバーとの少なくとも一方の接合部分に熱可塑性樹脂が設けられ、前記補強部材と底面カバーおよび/または天面カバーとが前記熱可塑性樹脂を介して接合されていることを特徴とする請求項1~5のうち、いずれか1項に記載の筐体。
- 前記補強部材と前記底面カバーおよび/または前記天面カバーとが直接接合されていることを特徴とする請求項1~6のうち、いずれか1項に記載の筐体。
- 前記補強部材と前記底面カバーおよび/または前記天面カバーに接合することによって形成された中空構造内の前記補強部材の表面に配設された発熱部材を備えることを特徴とする請求項1~7のうち、いずれか1項に記載の筐体。
- 前記補強部材と前記底面カバーおよび/または前記天面カバーに接合することによって形成された中空構造内において、別の補強部材を備えることを特徴とする請求項1~8のうち、いずれか1項に記載の筐体。
- 前記別の補強部材が、前記補強部材の内面と前記補強部材が接合されている前記底面カバーまたは前記天面カバーに接合されていることを特徴とする請求項9に記載の筐体。
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