WO2015097966A1 - Portable terminal and method for producing same - Google Patents

Portable terminal and method for producing same Download PDF

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Publication number
WO2015097966A1
WO2015097966A1 PCT/JP2014/005612 JP2014005612W WO2015097966A1 WO 2015097966 A1 WO2015097966 A1 WO 2015097966A1 JP 2014005612 W JP2014005612 W JP 2014005612W WO 2015097966 A1 WO2015097966 A1 WO 2015097966A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
layer
reflective layer
laser light
heat generating
Prior art date
Application number
PCT/JP2014/005612
Other languages
French (fr)
Japanese (ja)
Inventor
浩司 藤永
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2015097966A1 publication Critical patent/WO2015097966A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B29C65/1683—Laser beams making use of an absorber or impact modifier coated on the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72324—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of inorganic materials not provided for in B29C66/72321 - B29C66/72322
    • B29C66/72325—Ceramics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/733—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
    • B29C66/7334—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being glossy or matt, reflective or refractive
    • B29C66/73341—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being glossy or matt, reflective or refractive at least one of the parts to be joined being glossy or reflective
    • 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
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0026—Transparent
    • B29K2995/0027—Transparent for light outside the visible spectrum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3431—Telephones, Earphones
    • B29L2031/3437—Cellular phones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3475—Displays, monitors, TV-sets, computer screens

Definitions

  • the present invention relates to a portable terminal having a display unit, a cover that covers the display unit, and a cabinet in which a cover adhering recess to which the cover is bonded is formed, and a method for manufacturing the portable terminal.
  • a cover made of transparent glass or acrylic plate covering the display unit has been bonded to the cabinet containing the display unit with double-sided tape or the like. It is known that the adhesive portion is hidden by a black print layer that has a high light shielding property and is suitable for hiding the member on the back side most, because an electrode of the touch panel is disposed.
  • the black print layer is often used as a heat generating layer that absorbs laser light. For this reason, if it is set as the heat_generation
  • the present invention has been made in view of such points, and the object of the present invention is to securely bond the cover to the cabinet with an adhesive member heated by a laser beam while enhancing the appearance with a color other than black. It is in.
  • a reflective layer that reflects part of visible light is provided on the front side of the heat generating layer that absorbs laser light.
  • the present invention is directed to a portable terminal having a display unit, a cabinet having a cover bonding portion that accommodates the display unit, and a cover that covers the cabinet from the front of the display unit,
  • the cover is made of a material that transmits laser light, and a thin-film reflective layer that transmits most of the laser light and reflects part of visible light is formed on at least the front surface of the outer peripheral edge of the cover, On the back side of the reflective layer, a heating layer that absorbs the laser light is provided, The back surface of the cover is bonded to the inner surface of the cover bonding portion by an adhesive member heated by the heat generating layer.
  • the present invention is directed to a manufacturing method for manufacturing a mobile terminal having a display unit, a cabinet having a cover bonding portion that accommodates the display unit, and a cover that covers the cabinet from the front of the display unit
  • the above manufacturing method is A reflective layer forming step of forming a reflective layer of a thin film that transmits most of the laser light and reflects part of visible light at least in front of the outer peripheral edge of the cover that transmits laser light; A heat generating layer forming step of forming a heat generating layer that absorbs the laser light on the back side of the reflective layer; A sandwiching step of sandwiching an adhesive member between the heat generating layer and the cover adhesive portion; A bonding step of irradiating laser light from the front side of the cover, transmitting the reflection layer, heating the heat generating layer to heat the adhesive member, and bonding the cover to the inner surface of the cover bonding portion.
  • the reflective layer since a part of visible light is reflected by the reflective layer, even if there is a heat generation layer made of a black print layer or the like, it does not look just black when viewed by the user, and the appearance is improved. Since this reflective layer transmits most of the laser beam, the heat generating layer can be heated by the laser beam and the cover can be bonded to the cover bonding portion by the adhesive member. For this reason, the display area can be increased as much as possible without deteriorating waterproofness.
  • the adhesive member may be either a thermoplastic resin material or a thermosetting resin material, and may be liquid or solid.
  • the reflective layer is suitable not to transmit 100% of the laser light but to transmit part of the visible light while transmitting the laser light as much as possible.
  • the cover adhesion portion includes not only a concave shape in which the cover is fitted, but also a frame shape in which the cover is placed. The inner surface of the cover bonding portion means the surface with which the cover is in contact.
  • laser light is irradiated from the front side of the cover, the reflective layer that reflects part of visible light is transmitted, the heat generating layer is heated, and the adhesive member is heated.
  • the cover By adhering to the inner surface of the cover adhering portion, the cover can be securely adhered to the cabinet by the adhesive member heated by the laser light while enhancing the appearance with a color other than black.
  • FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG. 2.
  • FIG. 6 is a view corresponding to FIG. 1 according to another embodiment.
  • the mobile phone 1 is made of, for example, a rectangular plate-like smartphone that is long in the vertical direction, and accommodates the display unit 2 on the front side.
  • a front cabinet 3 is provided.
  • a rectangular dish-shaped metal frame 3a is insert-molded, and a cover adhesive portion 3b that is one step lower is continuously formed on the outer peripheral edge portion.
  • the left and right widths of the cover bonding part 3b are narrow, and the widths of the upper and lower cover bonding parts 3b are wide. This left and right width is narrower than that of the prior art, for example, about 0.5 to 1 mm.
  • the material of the front-side cabinet 3 is not particularly limited, such as a resin molded product or a metal molded product, but it needs to be able to withstand the heat generated by the laser beam.
  • the back side cabinet 4 is coupled to the back side of the front side cabinet 3, and the back side is covered with a rear cover 5.
  • a circuit board and a rechargeable battery housed inside are omitted.
  • the display unit 2 has a cover 2a made of a transparent glass plate.
  • a touch panel (not shown) may be attached to the back side, or the cover 2a itself may be a touch panel.
  • a display unit 2b such as a liquid crystal display or an organic EL display is attached to the back side of the cover 2a.
  • the cover 2a may be made of a transparent resin material that easily transmits laser light, such as an acrylic plate, but needs to be able to withstand the heat generated by the laser light.
  • a black print layer is provided on the back surface of the cover 2a to hide the outside of the display area of the display unit 2b.
  • the black print layer does not transmit and reflect the laser light, but absorbs it easily, and thus plays the role of the heat generating layer 11.
  • the black print layer is provided by attaching an ink containing a black dye or pigment to the back surface of the cover 2a, but it must be capable of withstanding the heat generated by the laser light.
  • the heat generating layer 11 may be provided by vapor deposition, film sticking, primer application, or the like.
  • a thin-film reflective layer 12 that reflects part of visible light is formed on the front side of the heat generating layer 11.
  • the reflective layer 12 is formed by alternately depositing a silicon oxide layer and a niobium oxide layer in multiple layers. Specifically, as shown in FIG. ing.
  • the thickness per layer is generally 20 to 50 nm. By adjusting the thickness and the number of layers of each reflective layer 12, the reflected color changes, so that the appearance can be easily adjusted.
  • the reflective layer 12 may be composed of zirconium oxide, titanium pentoxide, magnesium fluoride, tantalum pentoxide, chromium, alumina, or the like.
  • the reflection layer 12 does not have a high reflectance of laser light having a wavelength of, for example, 900 nm or more and 1050 nm or less.
  • silicon oxide and niobium oxide which are highly available and do not have high reflectivity of laser light, are suitable.
  • a cover 2a without the reflective layer 12 and a cover 2a with the reflective layer 12 were prepared and tested.
  • the cover 2a with the reflective layer 12 was confirmed to have a blue color by lowering the transmittance in the 300 nm to 500 nm region (increasing the reflectance) as compared with the cover 2a without the reflective layer 12.
  • the laser beam is adjusted to be transmitted by suppressing the transmittance to about 5%.
  • the cover 2a is bonded by the bonding member 10 at the cover bonding portion 3b.
  • the adhesive member 10 is obtained by molding a thermoplastic resin material that is melted by heating into a rectangular frame shape in front view according to the shape of the cover adhesive portion 3b. Although it does not specifically limit as a thermoplastic resin material, it is easy to adhere
  • the front surface of the cover 2a is covered with a protective film 13 for preventing the cover 2a from being broken and for preventing the cover 2a from being scattered when the cover 2a is made of glass.
  • the protective film 13 consists of what covered the base material which consists of a PET film, a polyester film, etc. with the hard-coat layer, for example.
  • the entire reflective layer 12 is covered with the protective film 13, thereby preventing the reflective layer 12 from peeling off.
  • the outer periphery is smaller than the outer periphery of the cover 2 a for easy attachment of the protective film 13, the entire reflective layer 12 may not be covered with the protective film 13.
  • the cover 2a cut out from the glass plate, the adhesive member 10 formed according to the cover adhesive portion 3b, the display unit 2b, the front cabinet 3 and the like are prepared.
  • a silicon oxide layer and a niobium oxide layer are alternately deposited in multiple layers on the front surface of the outer peripheral edge of the cover 2a that transmits laser light.
  • the film thickness and the number of layers of the reflective layer are adjusted so that the reflectance of the laser beam does not increase as in the above-described embodiment.
  • the heat generation layer 11 is formed on the back side of the reflective layer 12.
  • the order of the reflective layer forming step and the heat generating layer forming step may be reversed.
  • the protective film 13 may be attached at any stage as long as the reflective layer 12 is formed.
  • an electrode of a touch panel is formed in an electrode installation process.
  • this electrode installation process does not need to be.
  • the adhesive member 10 is clamped between the back surface of the cover 2a and the front cabinet 3.
  • the adhesive member 10 is formed in advance in a rectangular frame shape in front view in accordance with the shape of the cover adhesive portion 3b, and, for example, pasted on a transparent separator with a positioning mark, the cover 2a rear surface or the cover adhesive portion 3b.
  • it is extremely easy to provide the adhesive member 10 in the cover adhesive portion 3b having a narrow width in the width direction.
  • pressurization is performed in a state where the adhesive member 10 is sandwiched between the back surface of the cover 2a and the inner surface of the cover bonding portion 3b (here, the front surface). This pressurizing step is not always necessary.
  • the reflection layer 12 provided on the front surface of the cover 2a has a laser beam reflectance as low as possible, so that most of the laser beam is transmitted through the reflection layer 12.
  • the transmitted laser light is absorbed by the heat generating layer 11 and generates heat.
  • the adhesive member 10 is heated and the thermoplastic resin material is melted and then cured again, and the back surface of the cover 2a is bonded to the inner surface of the cover bonding portion 3b.
  • the heating condition may be, for example, 0.4 to 1.2 J, preferably 0.6 to 1.0 J at which the temperature of the adhesive member 10 is 100 to 150 ° C.
  • the cover 2a is pressed against the front cabinet 3 side, so that the gap between the unevenness on the back surface of the cover 2a or the inner surface of the cover bonding portion 3b and the adhesive member 10 is eliminated.
  • the heat generating layer 11 can be heated by laser light to melt and cure the adhesive member 10.
  • the peripheral edge of the cover 2a is bonded to the cover adhesive portion 3b formed continuously from the outer peripheral edge portion of the front side cabinet 3 by the adhesive member 10 heated by the heat generation of the black print layer which is the heat generating layer 11 of the cover 2a.
  • the conventional black printing layer which makes the inside invisible can be used as it is and the adhesive member 10 can be heated by the heat generating layer 11, it is not necessary to add a process only for providing the heat generating layer 11. .
  • the waterproof mobile phone 1 can be assembled.
  • the adhesive member 10 may be either a thermoplastic resin material or a thermosetting resin material, and may be liquid or solid. However, when the adhesive member 10 is shaped in advance in accordance with the adhesion site as in the above-described embodiment, it is easier to handle than the liquid and the adhesive member 10 is easily clamped, and even if the adhesion area is narrow, it is reliable. Can be glued on.
  • the mobile phone 1 looks to the user in a color other than black even if the heat generating layer 11 is black, so that the appearance is improved.
  • the cover 2a can be reliably bonded to the front cabinet 3 by the adhesive member 10 heated by the laser beam while enhancing the appearance with colors other than black.
  • the heat generating layer 11 is a black print layer printed on the back surface of the cover 2a.
  • the heat generating layer 11 that easily absorbs laser light may be formed on the front surface of the cover bonding portion 3b on the cover 2a side.
  • the heat generating layer 11 may be provided with a black print layer or a black tape, for example.
  • the heat generating layer 11 is provided on the cover bonding portion 3b side, thereby heating the front cabinet 3 side and softening the adhesive member 10. Can be melted or cured.
  • the present invention may be configured as follows with respect to the above embodiment.
  • the heat generating layer 11 is a black printed layer on the back surface of the cover 2a or a heat generating layer provided on the cover bonding portion 3b.
  • the adhesive member 10 may be heated by both the heat generating layer 11 provided in the cover adhesive portion 3b.
  • the adhesive member 10 itself may include a component that generates heat by absorbing laser light and a material that easily transmits heat.
  • the adhesive member 10 since the adhesive member 10 was made into the frame shape which shape
  • the reflection layer 12 was formed only in the front of the outer periphery of the cover 2a, it is not limited only to an outer periphery, The area
  • the surface of the cover 2a is covered with the protective film 13, it does not necessarily need to cover with the protective film 13, and the reflective layer 12 may be exposed.
  • the cover adhesion part 3b was made into the concave shape which a cover fits in, as shown in FIG. It also includes a frame-shaped one that is only placed on the inner surface (front surface) of 3b.
  • the reflective layer 12 may be provided on the back surface of the curved portion of the cover 2a.
  • the heat generation layer 11 may be provided at least in a portion where the adhesive member 10 is provided.
  • the mobile terminal is the mobile phone 1, but PHS (Personal Handy-phone System System), PDA (Personal Digital Assistant), smartphone, personal computer, mobile tool, electronic dictionary, calculator, game machine, etc. There may be.
  • PHS Personal Handy-phone System System
  • PDA Personal Digital Assistant

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Abstract

The present invention adheres a cover (2a) to the inner surface of a cover-adhering section (3b) by: emitting a laser beam on the front-surface side of the cover (2a), and heating an adhering member (10) by heating a heat-emitting layer (11) by transmitting the laser beam through a reflective layer (12) which reflects some visible light. As a result, a cover is definitively adhered to a cabinet by an adhering member heated by a laser beam, while also improving the appearance of a color other than black.

Description

携帯端末及びその製造方法Mobile terminal and manufacturing method thereof
　本発明は、表示ユニットと、この表示ユニットを覆うカバーと、このカバーが接着されるカバー接着用凹部が形成されたキャビネットとを有する携帯端末及びその製造方法に関するものである。 The present invention relates to a portable terminal having a display unit, a cover that covers the display unit, and a cabinet in which a cover adhering recess to which the cover is bonded is formed, and a method for manufacturing the portable terminal.
　従来より、表示ユニットを覆う透明なガラスやアクリル板よりなるカバーは、表示ユニットを収容するキャビネットに両面テープなどで接着されていた。この接着部分は、タッチパネルの電極などが配置されるので、遮光性が高くて最も背面側の部材を隠すのに適する黒色印刷層により隠されることが知られている。 Conventionally, a cover made of transparent glass or acrylic plate covering the display unit has been bonded to the cabinet containing the display unit with double-sided tape or the like. It is known that the adhesive portion is hidden by a black print layer that has a high light shielding property and is suitable for hiding the member on the back side most, because an electrode of the touch panel is disposed.
　近年、携帯電話機に代表される携帯端末は、表示部を広くしながらも、携帯端末自体の大きさは大きくしないことが求められている。しかも、携帯端末を誤って水の中に落としてしまっても壊れない防水性能が求められている。携帯端末が一方に長い矩形板状であった場合、特にその幅方向両側は、防水性を保つために両面テープによる接着面積をある程度大きく保つ必要がある。 In recent years, it has been demanded that a mobile terminal represented by a mobile phone does not increase the size of the mobile terminal itself while widening the display unit. Moreover, there is a demand for waterproof performance that does not break even if the mobile terminal is accidentally dropped into water. When the portable terminal is in the shape of a rectangular plate that is long on one side, it is necessary to keep the bonding area by the double-sided tape to a certain extent in order to maintain waterproofness, especially on both sides in the width direction.
　そこで、特許文献１のようにレーザ光を利用して熱硬化性樹脂よりなる接着部材を加熱して接着させる接着方法を利用することが考えられる。 Therefore, it is conceivable to use an adhesion method in which an adhesive member made of a thermosetting resin is heated and adhered using laser light as in Patent Document 1.
特開２０１２－２１８３１６号公報JP 2012-218316 A
　しかしながら、外観をよくするために、従来より用いられている黒色印刷層以外の色彩が求められることがある。 However, in order to improve the appearance, colors other than the conventionally used black print layer may be required.
　一方、特許文献１のようなレーザ光を用いる方法では、黒色印刷層がレーザ光を吸収する発熱層として用いられることが多い。このため、黒色以外の発熱層とすると、レーザ光の吸収効率が悪くなる。 On the other hand, in the method using laser light as in Patent Document 1, the black print layer is often used as a heat generating layer that absorbs laser light. For this reason, if it is set as the heat_generation | fever layer other than black, the absorption efficiency of a laser beam will worsen.
　本発明は、かかる点に鑑みてなされたものであり、その目的とするところは、黒色以外の色彩で外観を高めながらもレーザ光により加熱された接着部材によりカバーをキャビネットに確実に接着することにある。 The present invention has been made in view of such points, and the object of the present invention is to securely bond the cover to the cabinet with an adhesive member heated by a laser beam while enhancing the appearance with a color other than black. It is in.
　上記の目的を達成するために、この発明では、レーザ光を吸収する発熱層の正面側に可視光の一部を反射する反射層を設けた。 In order to achieve the above object, in the present invention, a reflective layer that reflects part of visible light is provided on the front side of the heat generating layer that absorbs laser light.
　具体的には、本発明では、表示ユニットと、該表示ユニットを収容するカバー接着部を有するキャビネットと、該表示ユニットの正面から該キャビネットを覆うカバーとを有する携帯端末を対象とし、
　上記カバーは、レーザ光を透過する材料よりなり、該カバーの少なくとも外周縁の正面には、該レーザ光の大部分を透過すると共に可視光の一部を反射する薄膜の反射層が形成され、該反射層の背面側には、上記レーザ光を吸収する発熱層が設けられ、
　上記カバーの背面が上記発熱層により加熱された接着部材により上記カバー接着部の内面に接着されている。 Specifically, the present invention is directed to a portable terminal having a display unit, a cabinet having a cover bonding portion that accommodates the display unit, and a cover that covers the cabinet from the front of the display unit,
The cover is made of a material that transmits laser light, and a thin-film reflective layer that transmits most of the laser light and reflects part of visible light is formed on at least the front surface of the outer peripheral edge of the cover, On the back side of the reflective layer, a heating layer that absorbs the laser light is provided,
The back surface of the cover is bonded to the inner surface of the cover bonding portion by an adhesive member heated by the heat generating layer.
　また、本発明では、表示ユニットと、該表示ユニットを収容するカバー接着部を有するキャビネットと、該表示ユニットの正面から該キャビネットを覆うカバーとを有する携帯端末を製造する製造方法を対象とし、
　上記製造方法は、
　レーザ光を透過する上記カバーの少なくとも外周縁の正面に該レーザ光の大部分を透過すると共に可視光の一部を反射する薄膜の反射層を形成する反射層形成工程と、
　上記反射層の背面側に上記レーザ光を吸収する発熱層を形成する発熱層形成工程と、
　上記発熱層と、上記カバー接着部との間に、接着部材を挟持する挟持工程と、
　上記カバーの正面側からレーザ光を照射し、上記反射層を透過させて発熱層を加熱して上記接着部材を加熱し、上記カバーを上記カバー接着部の内面に接着する接着工程とを含む。 Further, the present invention is directed to a manufacturing method for manufacturing a mobile terminal having a display unit, a cabinet having a cover bonding portion that accommodates the display unit, and a cover that covers the cabinet from the front of the display unit,
The above manufacturing method is
A reflective layer forming step of forming a reflective layer of a thin film that transmits most of the laser light and reflects part of visible light at least in front of the outer peripheral edge of the cover that transmits laser light;
A heat generating layer forming step of forming a heat generating layer that absorbs the laser light on the back side of the reflective layer;
A sandwiching step of sandwiching an adhesive member between the heat generating layer and the cover adhesive portion;
A bonding step of irradiating laser light from the front side of the cover, transmitting the reflection layer, heating the heat generating layer to heat the adhesive member, and bonding the cover to the inner surface of the cover bonding portion.
　このため、本発明では、反射層によって可視光の一部が反射されるので、黒色印刷層などよりなる発熱層があっても、ユーザが見ると単なる黒色には見えず、外観が向上する。この反射層は、レーザ光の大部分を透過するので、レーザ光によって発熱層を加熱して接着部材によりカバーをカバー接着部に接着することができる。このため、防水性を低下させることなく、できるだけ表示面積を広くすることができる。なお、接着部材は、熱可塑性樹脂材及び熱硬化性樹脂材のどちらでもよく、液状でも固体でもよい。反射層は、レーザ光を１００％透過するのではなく、できるだけレーザ光を透過しながらも可視光の一部を透過するものが適している。カバー接着部は、カバーが嵌まり込むような凹状のものだけでなく、カバーが載るだけの枠状のものも含む。カバー接着部の内面とは、カバーが接する表面を意味する。 For this reason, in the present invention, since a part of visible light is reflected by the reflective layer, even if there is a heat generation layer made of a black print layer or the like, it does not look just black when viewed by the user, and the appearance is improved. Since this reflective layer transmits most of the laser beam, the heat generating layer can be heated by the laser beam and the cover can be bonded to the cover bonding portion by the adhesive member. For this reason, the display area can be increased as much as possible without deteriorating waterproofness. The adhesive member may be either a thermoplastic resin material or a thermosetting resin material, and may be liquid or solid. The reflective layer is suitable not to transmit 100% of the laser light but to transmit part of the visible light while transmitting the laser light as much as possible. The cover adhesion portion includes not only a concave shape in which the cover is fitted, but also a frame shape in which the cover is placed. The inner surface of the cover bonding portion means the surface with which the cover is in contact.
　以上説明したように、本発明によれば、カバーの正面側からレーザ光を照射し、可視光の一部を反射する反射層を透過させて発熱層を加熱して接着部材を加熱し、カバーをカバー接着部の内面に接着するようにしたことにより、黒色以外の色彩で外観を高めながらもレーザ光により加熱された接着部材によりカバーをキャビネットに確実に接着することができる。 As described above, according to the present invention, laser light is irradiated from the front side of the cover, the reflective layer that reflects part of visible light is transmitted, the heat generating layer is heated, and the adhesive member is heated. By adhering to the inner surface of the cover adhering portion, the cover can be securely adhered to the cabinet by the adhesive member heated by the laser light while enhancing the appearance with a color other than black.
図４のＩ部拡大断面図である。It is the I section expanded sectional view of FIG. 携帯電話機を示す斜視図である。It is a perspective view which shows a mobile telephone. 携帯電話機を示す分解斜視図である。It is a disassembled perspective view which shows a mobile telephone. 図２のIV－IV線拡大断面図である。FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG. 2. その他の実施形態に係る図１相当図である。FIG. 6 is a view corresponding to FIG. 1 according to another embodiment.
　以下、本発明の実施形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　図１～図４は本発明の実施形態の携帯端末としての携帯電話機１を示し、この携帯電話機１は、例えば上下方向に長い矩形板状のスマートフォンよりなり、正面側に表示部２を収容する正面側キャビネット３を有する。正面側キャビネット３は、例えば、矩形皿状の金属フレーム３ａがインサート成形され、外周縁部に一段低くなったカバー接着部３ｂが連続して形成されている。このカバー接着部３ｂの左右幅は狭く、上下のカバー接着部３ｂの幅は広くなっている。この左右幅は、従来に比べてさらに狭く、例えば０．５～１ｍｍ程度となっている。正面側キャビネット３の材質は、樹脂成形品、金属成形品など特に限定されないが、レーザ光による発熱に耐えうるものである必要がある。 1 to 4 show a mobile phone 1 as a mobile terminal according to an embodiment of the present invention. The mobile phone 1 is made of, for example, a rectangular plate-like smartphone that is long in the vertical direction, and accommodates the display unit 2 on the front side. A front cabinet 3 is provided. In the front side cabinet 3, for example, a rectangular dish-shaped metal frame 3a is insert-molded, and a cover adhesive portion 3b that is one step lower is continuously formed on the outer peripheral edge portion. The left and right widths of the cover bonding part 3b are narrow, and the widths of the upper and lower cover bonding parts 3b are wide. This left and right width is narrower than that of the prior art, for example, about 0.5 to 1 mm. The material of the front-side cabinet 3 is not particularly limited, such as a resin molded product or a metal molded product, but it needs to be able to withstand the heat generated by the laser beam.
　図１にも拡大して示すように、正面側キャビネット３の背面側には、背面側キャビネット４が結合され、その背面側がリアカバー５で覆われている。なお、図４では、内部に収容されている回路基板や充電池は省略している。 As shown in FIG. 1 in an enlarged manner, the back side cabinet 4 is coupled to the back side of the front side cabinet 3, and the back side is covered with a rear cover 5. In FIG. 4, a circuit board and a rechargeable battery housed inside are omitted.
　表示部２は、透明なガラス板よりなるカバー２ａを有する。その背面側にタッチパネル（図示せず）が貼り付けられてもよいし、カバー２ａ自体がタッチパネルでもよい。カバー２ａの背面側に液晶ディスプレイ、有機ＥＬディスプレイなどの表示ユニット２ｂが貼り付けられている。カバー２ａは、アクリル板などの透明でレーザ光を透過しやすい樹脂材料で構成されていてもよいが、レーザ光による発熱に耐えうるものである必要がある。 The display unit 2 has a cover 2a made of a transparent glass plate. A touch panel (not shown) may be attached to the back side, or the cover 2a itself may be a touch panel. A display unit 2b such as a liquid crystal display or an organic EL display is attached to the back side of the cover 2a. The cover 2a may be made of a transparent resin material that easily transmits laser light, such as an acrylic plate, but needs to be able to withstand the heat generated by the laser light.
　本実施形態では、カバー２ａの背面に表示ユニット２ｂの表示エリアの外側を隠す黒色印刷層が施されている。この黒色印刷層は、レーザ光を透過及び反射するのではなく、吸収しやすいので、発熱層１１の役割を果たす。黒色印刷層は、黒色の染料や顔料を含むインクをカバー２ａの背面に付着させることによって設けられるが、レーザ光による発熱に耐えうるものである必要がある。発熱層１１を蒸着、フィルムの貼付、プライマーの塗布等によって設けてもよい。 In this embodiment, a black print layer is provided on the back surface of the cover 2a to hide the outside of the display area of the display unit 2b. The black print layer does not transmit and reflect the laser light, but absorbs it easily, and thus plays the role of the heat generating layer 11. The black print layer is provided by attaching an ink containing a black dye or pigment to the back surface of the cover 2a, but it must be capable of withstanding the heat generated by the laser light. The heat generating layer 11 may be provided by vapor deposition, film sticking, primer application, or the like.
　本実施形態では、この発熱層１１の正面側に可視光の一部を反射する薄膜の反射層１２が形成されている。この反射層１２は、酸化シリコンの層と、酸化ニオブの層とを交互に多層に蒸着したものよりなり、具体的には、図１に示すように、カバー２ａの外周縁の正面に形成されている。一層あたりの厚みは２０～５０ｎｍが一般的である。各反射層１２の厚さと層数を調整することにより、反射する色が変化するので、外観を調整しやすい。また、反射層１２は、酸化ジルコニウム、五酸化チタン、フッ化マグネシウム、五酸化タンタル、クロム及びアルミナ系等で構成してもよい。しかしながら、本実施形態では、この反射層１２が、例えば波長が９００ｎｍ以上１０５０ｎｍ以下であるレーザ光の反射率が高くないことが重要である。この点で、入手性がよく、レーザ光の反射率が高くない酸化シリコンと酸化ニオブが適している。 In this embodiment, a thin-film reflective layer 12 that reflects part of visible light is formed on the front side of the heat generating layer 11. The reflective layer 12 is formed by alternately depositing a silicon oxide layer and a niobium oxide layer in multiple layers. Specifically, as shown in FIG. ing. The thickness per layer is generally 20 to 50 nm. By adjusting the thickness and the number of layers of each reflective layer 12, the reflected color changes, so that the appearance can be easily adjusted. The reflective layer 12 may be composed of zirconium oxide, titanium pentoxide, magnesium fluoride, tantalum pentoxide, chromium, alumina, or the like. However, in the present embodiment, it is important that the reflection layer 12 does not have a high reflectance of laser light having a wavelength of, for example, 900 nm or more and 1050 nm or less. In this respect, silicon oxide and niobium oxide, which are highly available and do not have high reflectivity of laser light, are suitable.
　例えば、反射層１２のないカバー２ａと反射層１２のあるカバー２ａとを用意し実験した。実験の結果、反射層１２のあるカバー２ａは反射層１２のないカバー２ａに比べて300ｎｍ～５００ｎｍ領域の透過率を下げる（反射率を上げる）ことで青系の色が確認できた。この際５００ｎｍ～１０５０ｎｍないし、それよりも高い波長領域では透過率を５％程度の低下に抑えることでレーザ光を透過するように調整している。この原理を利用し、反射層１２の層構成により透過率（反射率）をコントロールすることで、９００ｎｍ～１０５０ｎｍ波長のレーザ光の透過と多色化の両立が可能となる。 For example, a cover 2a without the reflective layer 12 and a cover 2a with the reflective layer 12 were prepared and tested. As a result of the experiment, the cover 2a with the reflective layer 12 was confirmed to have a blue color by lowering the transmittance in the 300 nm to 500 nm region (increasing the reflectance) as compared with the cover 2a without the reflective layer 12. At this time, in a wavelength region of 500 nm to 1050 nm or higher, the laser beam is adjusted to be transmitted by suppressing the transmittance to about 5%. By utilizing this principle and controlling the transmittance (reflectance) by the layer structure of the reflective layer 12, it is possible to achieve both transmission of laser light having a wavelength of 900 nm to 1050 nm and multicolorization.
　カバー２ａは、カバー接着部３ｂにおいて、接着部材１０によって接着されている。接着部材１０は、加熱により溶ける熱可塑性樹脂材をカバー接着部３ｂの形状に合わせて予め正面視矩形枠状に成形したものである。熱可塑性樹脂材としては特に限定されないが、カバー２ａ及び正面側キャビネット３のいずれにも接着しやすく、これらの材料に悪影響を与えない温度で溶けるものである必要がある。 The cover 2a is bonded by the bonding member 10 at the cover bonding portion 3b. The adhesive member 10 is obtained by molding a thermoplastic resin material that is melted by heating into a rectangular frame shape in front view according to the shape of the cover adhesive portion 3b. Although it does not specifically limit as a thermoplastic resin material, it is easy to adhere | attach on both the cover 2a and the front side cabinet 3, and it needs to melt | dissolve at the temperature which does not have a bad influence on these materials.
　カバー２ａの正面は、カバー２ａを割れにくくすると共に、カバー２ａがガラスであった場合には、その飛散を防止するための保護フィルム１３で覆われている。保護フィルム１３は、例えば、ＰＥＴフィルム、ポリエステルフィルム等よりなる基材をハードコート層で覆ったものよりなる。図１では、反射層１２の全体が保護フィルム１３で覆われることにより、反射層１２が剥がれるのを防止している。なお、保護フィルム１３の貼り付けやすさのために外周がカバー２ａの外周よりも小さくなっている場合等には、反射層１２の全体が保護フィルム１３で覆われていなくてもよい。 The front surface of the cover 2a is covered with a protective film 13 for preventing the cover 2a from being broken and for preventing the cover 2a from being scattered when the cover 2a is made of glass. The protective film 13 consists of what covered the base material which consists of a PET film, a polyester film, etc. with the hard-coat layer, for example. In FIG. 1, the entire reflective layer 12 is covered with the protective film 13, thereby preventing the reflective layer 12 from peeling off. In addition, when the outer periphery is smaller than the outer periphery of the cover 2 a for easy attachment of the protective film 13, the entire reflective layer 12 may not be covered with the protective film 13.
　次に、本発明のカバー２ａの貼付手順について説明する。 Next, the procedure for attaching the cover 2a of the present invention will be described.
　まず準備工程において、ガラス板から切り出したカバー２ａ、カバー接着部３ｂに合わせて成形した接着部材１０、表示ユニット２ｂ、正面側キャビネット３等を用意する。 First, in the preparation step, the cover 2a cut out from the glass plate, the adhesive member 10 formed according to the cover adhesive portion 3b, the display unit 2b, the front cabinet 3 and the like are prepared.
　次いで、反射層形成工程において、レーザ光を透過するカバー２ａの外周縁の正面に酸化シリコンの層と、酸化ニオブの層とを交互に多層に蒸着する。このとき、上述した実施例のように反射層の膜厚と層数は、レーザ光の反射率が高くならないように調整する。 Next, in the reflective layer forming step, a silicon oxide layer and a niobium oxide layer are alternately deposited in multiple layers on the front surface of the outer peripheral edge of the cover 2a that transmits laser light. At this time, the film thickness and the number of layers of the reflective layer are adjusted so that the reflectance of the laser beam does not increase as in the above-described embodiment.
　次いで、発熱層形成工程において、反射層１２の背面側に発熱層１１を形成する。但し、反射層形成工程と発熱層形成工程との順番は逆でもよい。また、反射層１２の形成後であれば、どの段階で保護フィルム１３を貼り付けてもよい。 Next, in the heat generation layer forming step, the heat generation layer 11 is formed on the back side of the reflective layer 12. However, the order of the reflective layer forming step and the heat generating layer forming step may be reversed. Further, the protective film 13 may be attached at any stage as long as the reflective layer 12 is formed.
　次いで、例えば電極設置工程において、タッチパネルの電極等を形成する。なお、この電極設置工程は、なくてもよい。 Next, for example, an electrode of a touch panel is formed in an electrode installation process. In addition, this electrode installation process does not need to be.
　次いで、挟持工程において、カバー２ａの背面と、正面側キャビネット３との間に接着部材１０を挟持する。接着部材１０は、カバー接着部３ｂの形状に合わせて予め正面視矩形枠状に成形し、例えば位置決めの印が付けられた透明なセパレータに貼り付けておけば、カバー２ａ背面又はカバー接着部３ｂに接着部材を塗布する場合に比べ、特に幅方向の幅の狭いカバー接着部３ｂに接着部材１０を設けるのが極めて容易となる。 Next, in the clamping step, the adhesive member 10 is clamped between the back surface of the cover 2a and the front cabinet 3. The adhesive member 10 is formed in advance in a rectangular frame shape in front view in accordance with the shape of the cover adhesive portion 3b, and, for example, pasted on a transparent separator with a positioning mark, the cover 2a rear surface or the cover adhesive portion 3b. Compared to the case where the adhesive member is applied to the cover, it is extremely easy to provide the adhesive member 10 in the cover adhesive portion 3b having a narrow width in the width direction.
　次いで、加圧工程において、カバー２ａの背面とカバー接着部３ｂの内面（ここでは正面側表面）との間に接着部材１０を挟持した状態で、加圧する。この加圧工程は、必ずしも必要ではない。 Next, in the pressurizing step, pressurization is performed in a state where the adhesive member 10 is sandwiched between the back surface of the cover 2a and the inner surface of the cover bonding portion 3b (here, the front surface). This pressurizing step is not always necessary.
　次いで、接着工程において、カバー２ａの正面側からレーザ光を照射する。ここでは、カバー２ａの正面に設けた反射層１２は、できるだけレーザ光の反射率を低くされているので、レーザ光の大部分は、この反射層１２を透過する。そして、この透過したレーザ光が発熱層１１で吸収され、発熱する。このことで、接着部材１０が加熱され、熱可塑性樹脂材が溶けた後、再び硬化し、カバー２ａの背面がカバー接着部３ｂの内面に接着される。加熱のための条件は、例えば、接着部材１０の温度が１００～１５０℃となる０．４～１．２Ｊ好ましくは、０．６～１．０Ｊとすればよい。なお、ここで、エネルギーＪは、レーザ出力をＷワット、レーザ焦点径をφｍｍ、走査速度をＶｍｍ／ｓｅｃとすれば、Ｊ＝Ｗ×φ／Ｖで計算される。なお、接着部材１０の温度が１５０～１７０℃となる１．０～１．２Ｊのエネルギーであれば、適度に加圧した場合でも、発泡して防水性が保ちにくい。０．４Ｊよりも小さいと、接着部材１０の発熱温度が８０℃以下となり接着部材１０が充分に軟化、溶融又は硬化しない。 Next, in the bonding process, laser light is irradiated from the front side of the cover 2a. Here, the reflection layer 12 provided on the front surface of the cover 2a has a laser beam reflectance as low as possible, so that most of the laser beam is transmitted through the reflection layer 12. The transmitted laser light is absorbed by the heat generating layer 11 and generates heat. As a result, the adhesive member 10 is heated and the thermoplastic resin material is melted and then cured again, and the back surface of the cover 2a is bonded to the inner surface of the cover bonding portion 3b. The heating condition may be, for example, 0.4 to 1.2 J, preferably 0.6 to 1.0 J at which the temperature of the adhesive member 10 is 100 to 150 ° C. Here, the energy J is calculated as J = W × φ / V where the laser output is W watts, the laser focal spot diameter is φmm, and the scanning speed is Vmm / sec. If the adhesive member 10 has an energy of 1.0 to 1.2 J at which the temperature of the adhesive member 10 is 150 to 170 ° C., it is difficult to maintain waterproofness even if it is appropriately pressurized. If it is less than 0.4 J, the heat generation temperature of the adhesive member 10 becomes 80 ° C. or lower, and the adhesive member 10 is not sufficiently softened, melted or cured.
　なお、加圧工程を設けた場合、カバー２ａを正面側キャビネット３側へ押さえ付けているので、カバー２ａ背面やカバー接着部３ｂ内面にある凹凸と接着部材１０との隙間をなくした状態で、レーザ光により発熱層１１を加熱して接着部材１０を溶かして硬化させることができて有利である。 In addition, when the pressurizing step is provided, the cover 2a is pressed against the front cabinet 3 side, so that the gap between the unevenness on the back surface of the cover 2a or the inner surface of the cover bonding portion 3b and the adhesive member 10 is eliminated. Advantageously, the heat generating layer 11 can be heated by laser light to melt and cure the adhesive member 10.
　また、カバー２ａの発熱層１１である黒色印刷層の発熱によって加熱された接着部材１０により、カバー２ａ周縁が正面側キャビネット３の外周縁部に連続して形成したカバー接着部３ｂに接着される。そして、従来よりある、内部を見えなくする黒色印刷層をそのまま使用でき、その発熱層１１によって接着部材１０を加熱することができるので、発熱層１１を設けるためだけの工程を追加しなくてよい。 Further, the peripheral edge of the cover 2a is bonded to the cover adhesive portion 3b formed continuously from the outer peripheral edge portion of the front side cabinet 3 by the adhesive member 10 heated by the heat generation of the black print layer which is the heat generating layer 11 of the cover 2a. . And since the conventional black printing layer which makes the inside invisible can be used as it is and the adhesive member 10 can be heated by the heat generating layer 11, it is not necessary to add a process only for providing the heat generating layer 11. .
　そして、接着部材１０により、カバー２ａと正面側キャビネット３との間を防水可能に密閉させた状態で、回路基板、充電池等を収容して背面側キャビネット４を結合し、リアカバー５で覆うことにより、防水型の携帯電話機１を組み立てることができる。 Then, with the adhesive member 10, the circuit board, the rechargeable battery, etc. are accommodated in a state where the space between the cover 2 a and the front cabinet 3 is sealed so as to be waterproof, and the back cabinet 4 is joined and covered with the rear cover 5. Thus, the waterproof mobile phone 1 can be assembled.
　なお、接着部材１０は、熱可塑性樹脂材及び熱硬化性樹脂材のどちらでもよく、液状でも固体でもよい。しかし、上記実施形態のように接着部材１０を予め接着部位に合わせた形状に成形した場合には、液体よりも取り扱いが容易で接着部材１０の挟持が容易となり、接着領域が狭い場合でも、確実に接着を行うことができる。 The adhesive member 10 may be either a thermoplastic resin material or a thermosetting resin material, and may be liquid or solid. However, when the adhesive member 10 is shaped in advance in accordance with the adhesion site as in the above-described embodiment, it is easier to handle than the liquid and the adhesive member 10 is easily clamped, and even if the adhesion area is narrow, it is reliable. Can be glued on.
　そして、携帯電話機１は、反射層１２により、可視光の一部が反射されるので、発熱層１１が黒色であってもユーザには、黒色以外の色に見えるので、外観が向上する。 And since a part of visible light is reflected by the reflective layer 12, the mobile phone 1 looks to the user in a color other than black even if the heat generating layer 11 is black, so that the appearance is improved.
　したがって、本実施形態では、黒色以外の色彩で外観を高めながらもレーザ光により加熱された接着部材１０によりカバー２ａを正面側キャビネット３に確実に接着することができる。 Therefore, in the present embodiment, the cover 2a can be reliably bonded to the front cabinet 3 by the adhesive member 10 heated by the laser beam while enhancing the appearance with colors other than black.
　－変形例－
　上記実施形態では、発熱層１１は、カバー２ａの背面に印刷した黒色印刷層としたが、カバー接着部３ｂのカバー２ａ側の正面にレーザ光を吸収しやすい発熱層１１を形成してもよい。この発熱層１１は、例えば、黒色印刷層を施してもよいし、黒色のテープを貼り付けてもよい。 -Modification-
In the above embodiment, the heat generating layer 11 is a black print layer printed on the back surface of the cover 2a. However, the heat generating layer 11 that easily absorbs laser light may be formed on the front surface of the cover bonding portion 3b on the cover 2a side. . The heat generating layer 11 may be provided with a black print layer or a black tape, for example.
　本変形例によれば、カバー２ａ側に発熱層１１を設けられない場合でも、カバー接着部３ｂ側に発熱層１１を設けることで、正面側キャビネット３側を加熱して接着部材１０を軟化、溶融又は硬化させることができる。 According to this modification, even when the heat generating layer 11 cannot be provided on the cover 2a side, the heat generating layer 11 is provided on the cover bonding portion 3b side, thereby heating the front cabinet 3 side and softening the adhesive member 10. Can be melted or cured.
　そして、反射層１２により、可視光の一部が反射されるので、カバー接着部３ｂの発熱層１１が黒色であってもユーザには、黒色以外の色に見えるので、外観が向上する。 And since a part of visible light is reflected by the reflective layer 12, even if the heat generating layer 11 of the cover adhesive portion 3b is black, it looks to the user a color other than black, so the appearance is improved.
　（その他の実施形態）
　本発明は、上記実施形態について、以下のような構成としてもよい。 (Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.
　すなわち、上記実施形態では、発熱層１１をカバー２ａ背面の黒色印刷層又はカバー接着部３ｂに設けた発熱層としているが、カバー２ａ背面の発熱層１１がレーザ光をある程度透過するものであれば、カバー接着部３ｂに設けた発熱層１１と両方で接着部材１０を加熱してもよい。さらには、接着部材１０自体がレーザ光を吸収して発熱する成分及び熱を伝達しやすい材料を含んでいてもよい。 That is, in the above embodiment, the heat generating layer 11 is a black printed layer on the back surface of the cover 2a or a heat generating layer provided on the cover bonding portion 3b. However, as long as the heat generating layer 11 on the back surface of the cover 2a transmits laser light to some extent. The adhesive member 10 may be heated by both the heat generating layer 11 provided in the cover adhesive portion 3b. Furthermore, the adhesive member 10 itself may include a component that generates heat by absorbing laser light and a material that easily transmits heat.
　また、上記実施形態では、接着部材１０を予め熱可塑性樹脂材を成形した枠状のものとしたので、従来の両面テープのような簡易な方法による貼付を行えるが、粘性の高い液状の接着部材１０をディスペンサーなどによりカバー２ａの背面又はカバー接着部３ｂの内面に塗りつけるようにしてもよい。 Moreover, in the said embodiment, since the adhesive member 10 was made into the frame shape which shape | molded the thermoplastic resin material previously, it can stick by a simple method like the conventional double-sided tape, but a liquid adhesive member with high viscosity 10 may be applied to the back surface of the cover 2a or the inner surface of the cover bonding portion 3b by a dispenser or the like.
　また、上記実施形態では、反射層１２をカバー２ａの外周縁の正面のみに形成したが、外周縁のみに限定されず、外周縁を含むそれよりも広い領域や、カバー２ａの正面全体でもよい。 Moreover, in the said embodiment, although the reflection layer 12 was formed only in the front of the outer periphery of the cover 2a, it is not limited only to an outer periphery, The area | region wider than that including an outer periphery and the whole front of the cover 2a may be sufficient. .
　また、上記実施形態では、カバー２ａの表面を保護フィルム１３で覆っているが、必ずしも保護フィルム１３で覆う必要がなく、反射層１２が露出していてもよい。 Moreover, in the said embodiment, although the surface of the cover 2a is covered with the protective film 13, it does not necessarily need to cover with the protective film 13, and the reflective layer 12 may be exposed.
　さらに、上記実施形態では、カバー接着部３ｂは、カバーが嵌まり込むような凹状のものとしたが、図５に示すような、外周が折り曲げられたカバー２ａの背面の一部がカバー接着部３ｂの内面（正面側表面）に載るだけの枠状のものも含む。この場合、カバー２ａの湾曲した部分の背面にも反射層１２を設ければよい。また、少なくとも接着部材１０のある部分に発熱層１１を設ければよい。 Furthermore, in the said embodiment, although the cover adhesion part 3b was made into the concave shape which a cover fits in, as shown in FIG. It also includes a frame-shaped one that is only placed on the inner surface (front surface) of 3b. In this case, the reflective layer 12 may be provided on the back surface of the curved portion of the cover 2a. Further, the heat generation layer 11 may be provided at least in a portion where the adhesive member 10 is provided.
　また、上記実施形態では、携帯端末は、携帯電話機１としたが、ＰＨＳ（Personal Handy-phone System ）、ＰＤＡ(Personal Digital Assistant)、スマートフォン、パソコン、モバイルツール、電子辞書、電卓、ゲーム機等であってもよい。 In the above embodiment, the mobile terminal is the mobile phone 1, but PHS (Personal Handy-phone System System), PDA (Personal Digital Assistant), smartphone, personal computer, mobile tool, electronic dictionary, calculator, game machine, etc. There may be.
　なお、以上の実施形態は、本質的に好ましい例示であって、本発明、その適用物や用途の範囲を制限することを意図するものではない。また、各実施形態に記載された技術的特徴は、互いに組合せ可能であり、組み合わせることにより、新しい技術的特徴を形成することができる。 In addition, the above embodiment is an essentially preferable example, and is not intended to limit the scope of the present invention, its application, and use. The technical features described in each embodiment can be combined with each other, and a new technical feature can be formed by combining them.
　　　　　　１　　　携帯電話機（携帯端末）
　　　　　　２　　　表示部
　　　　　　２ａ　　カバー
　　　　　　２ｂ　　表示ユニット
　　　　　　３　　　正面側キャビネット（キャビネット）
　　　　　　３ａ　　金属フレーム
　　　　　　３ｂ　　カバー接着部
　　　　　　４　　　背面側キャビネット
　　　　　　５　　　リアカバー
　　　　　１０　　　接着部材
　　　　　１１　　　発熱層
　　　　　１２　　　反射層
　　　　　１３　　　保護フィルム 1 Mobile phone (mobile terminal)
2 Display unit 2a Cover 2b Display unit 3 Front cabinet (cabinet)
3a Metal frame 3b Cover bonding part 4 Back side cabinet 5 Rear cover 10 Adhesive member 11 Heat generation layer 12 Reflective layer 13 Protective film

Claims (5)

  1. 　表示ユニットと、該表示ユニットを覆うカバーと、該カバーが接着されるカバー接着部が形成されたキャビネットとを有する携帯端末であって、
    　上記カバーは、レーザ光を透過する材料よりなり、該カバーの少なくとも外周縁の正面には、該レーザ光の大部分を透過すると共に可視光の一部を反射する薄膜の反射層が形成され、該反射層の背面側には、上記レーザ光を吸収する発熱層が設けられ、
    　上記カバーの背面が上記発熱層により加熱された接着部材により上記カバー接着部の内面に接着されている
    ことを特徴とする携帯端末。     A portable terminal having a display unit, a cover that covers the display unit, and a cabinet in which a cover bonding portion to which the cover is bonded is formed,
    The cover is made of a material that transmits laser light, and a thin-film reflective layer that transmits most of the laser light and reflects part of visible light is formed on at least the front surface of the outer peripheral edge of the cover, On the back side of the reflective layer, a heating layer that absorbs the laser light is provided,
    A portable terminal, wherein a back surface of the cover is bonded to an inner surface of the cover bonding portion by an adhesive member heated by the heat generating layer.
  2. 　請求項１に記載の携帯端末において、
    　上記反射層は、酸化シリコン、酸化ニオブ、酸化ジルコニウム、五酸化チタン、フッ化マグネシウム、五酸化タンタル、クロム及びアルミナ系からなる群から選択された少なくとも２つの層が積層されている
    ことを特徴とする携帯端末。     The mobile terminal according to claim 1,
    The reflective layer is characterized in that at least two layers selected from the group consisting of silicon oxide, niobium oxide, zirconium oxide, titanium pentoxide, magnesium fluoride, tantalum pentoxide, chromium and alumina are laminated. Mobile terminal.
  3. 　請求項１又は２に記載の携帯端末において、
    　上記反射層の少なくとも一部は、上記カバーの正面を保護する保護カバーで覆われている
    ことを特徴とする携帯端末。     The mobile terminal according to claim 1 or 2,
    At least a part of the reflective layer is covered with a protective cover that protects the front surface of the cover.
  4. 　表示ユニットと、該表示ユニットを覆うカバーと、該カバーが接着されるカバー接着部が形成されたキャビネットとを有する携帯端末を製造する製造方法であって、
    　レーザ光を透過する上記カバーの少なくとも外周縁の正面に該レーザ光の大部分を透過すると共に可視光の一部を反射する薄膜の反射層を形成する反射層形成工程と、
    　上記反射層の背面側に上記レーザ光を吸収する発熱層を形成する発熱層形成工程と、
    　上記発熱層と、上記カバー接着部との間に、接着部材を挟持する挟持工程と、
    　上記カバーの正面側からレーザ光を照射し、上記反射層を透過させて発熱層を加熱して上記接着部材を加熱し、上記カバーを上記カバー接着部の内面に接着する接着工程とを含む
    ことを特徴とする携帯端末の製造方法。     A manufacturing method for manufacturing a mobile terminal having a display unit, a cover that covers the display unit, and a cabinet in which a cover bonding portion to which the cover is bonded is formed,
    A reflective layer forming step of forming a reflective layer of a thin film that transmits most of the laser light and reflects part of visible light at least in front of the outer peripheral edge of the cover that transmits laser light;
    A heat generating layer forming step of forming a heat generating layer that absorbs the laser light on the back side of the reflective layer;
    A sandwiching step of sandwiching an adhesive member between the heat generating layer and the cover adhesive portion;
    Including a bonding step of irradiating a laser beam from the front side of the cover, transmitting the reflection layer, heating the heat generating layer to heat the adhesive member, and bonding the cover to the inner surface of the cover bonding portion. A method for manufacturing a portable terminal.
  5. 　請求項４に記載の携帯端末の製造方法において、
    　上記反射層形成工程において、酸化シリコン、酸化ニオブ、酸化ジルコニウム、五酸化チタン、フッ化マグネシウム、五酸化タンタル、クロム、アルミナ系からなる群から選択された少なくとも２つの層を積層する
    ことを特徴とする携帯端末の製造方法。     In the manufacturing method of the portable terminal of Claim 4,
    In the reflective layer forming step, at least two layers selected from the group consisting of silicon oxide, niobium oxide, zirconium oxide, titanium pentoxide, magnesium fluoride, tantalum pentoxide, chromium, and alumina are stacked. A method for manufacturing a portable terminal.
PCT/JP2014/005612 2013-12-25 2014-11-07 Portable terminal and method for producing same WO2015097966A1 (en)

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