EP1719042A2 - Boitier resistant aux impacts a ouverture obturable - Google Patents

Boitier resistant aux impacts a ouverture obturable

Info

Publication number
EP1719042A2
EP1719042A2 EP04814457A EP04814457A EP1719042A2 EP 1719042 A2 EP1719042 A2 EP 1719042A2 EP 04814457 A EP04814457 A EP 04814457A EP 04814457 A EP04814457 A EP 04814457A EP 1719042 A2 EP1719042 A2 EP 1719042A2
Authority
EP
European Patent Office
Prior art keywords
impact
absorbing insert
user defined
insert
absorbing
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP04814457A
Other languages
German (de)
English (en)
Inventor
Robert J. Cleereman
Joseph A. Langmaid
Jeffrey D. Wenzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Global Technologies LLC
Original Assignee
Dow Global Technologies LLC
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 Dow Global Technologies LLC filed Critical Dow Global Technologies LLC
Publication of EP1719042A2 publication Critical patent/EP1719042A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • A45C11/38—Camera cases, e.g. of ever-ready type
    • 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
    • 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
    • G06F1/1626—Constructional details or arrangements for portable computers with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
    • 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
    • H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
    • 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
    • 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
    • A45C2011/001—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00 for portable audio devices, e.g. headphones or MP3-players
    • 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
    • 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 an impact-resistant case with a sealable opening, in particularly to a dust and watertight seal.
  • Electronic enclosures and housings are basically cases designed to provide protection for product contents. Aesthetics, ergonomics, weight, decoration, and additional functionality are provided as well since the case is usually the basis of human interface to the product. This interface may be sensory (visual) only, or it may be the basis for product use - e.g. the user holds onto the package to use the product. For example, a portable drill where the case is also the tool housing and the housing is what the operator holds to use the tool.
  • foam cubes can be placed in a corrugated box between the fragile contents and the box (case) and these blocks will provide a high degree of impact protection.
  • this approach yields a large and bulky package.
  • the case needs to provide the "user interface”
  • this approach is typically much larger than is practical and, on a sensory basis, it will appear as large, unwieldy, and even ugly.
  • user preferred supplemental enclosures are intensively designed to minimize size, bulk, weight, and optimize ergonomics.
  • Most portable electronic devices have features that require access while contained in a supplemental enclosure, for example, a protective case.
  • PDAs Personal Data Assistants
  • PDAs Personal Data Assistants
  • incorporating a functional requirement, such as access traditionally has resulted in increasing the number of parts, the complexity to design and the cost to manufacture a protective case.
  • the protective case might end up with as much or more engineering as the basic product itself.
  • the conventional approach to this problem has been to tailor the design of the protective case for portable electronic device, unfortunately, this approach is time consuming and expensive.
  • the present invention is a cost effective impact-absorbing insert which combines multiple functionality with parts consolidation and ease of customization that allows wide application anywhere tailored impact protection is desired.
  • the impact-absorbing insert of the present invention mates with a user defined enclosure to produce a protective case for any fragile article that is used in a portable environment, for example portable electronic devices such as cameras (35 mm and digital), instrumentation, tools, PDAs, web tablets, hand held computers, cell phones, a pagers, gaming devices, electronic music players, voice recorders, global positioning systems (GPS), and the like.
  • the present invention is an impact-absorbing insert for a protective case designed for containing and protecting a fragile article wherein the insert comprises one or more impact-absorbing portion and one or more tethered plug for insertion into an access tunnel contained in a mating user defined enclosure, wherein said access tunnel provides access to features of the article without opening the protective case.
  • the present invention is a protective case for a fragile article comprising the impact-absorbing insert of the present invention and a user defined enclosure wherein the protective case provides impact protection and, when the access tunnel is plugged, a water tight and dust tight seal for the fragile article.
  • the impact-absorbing insert comprises a molded polymeric material, preferably a low hardness, highly elastic polymeric material such as an elastomeric thermoplastic or an elastomeric thermoset plastic, preferably thermoplastic polyurethane.
  • Another embodiment of the invention is a method to retain the impact-absorbing insert in a user defined enclosure by designing attachment features which produce a tight fit between the impact-absorbing insert with the user defined enclosure, for example molded fingers on the impact-absorbing insert and grooves on the user defined enclosure, fingers on the user defined enclosure and grooves are on the impact-absorbing insert, or combinations thereof.
  • the impact-absorbing portion of the impact- absorbing insert comprises one or more of an integral energy absorbing web and rib feature that compresses or deforms to absorb impact loading, molded-in buttons, ribs, aesthetics features, engagement ribs, interference tolerances to enable positive fit and function for the life of the article, or combinations thereof.
  • FIG. 1 is an exploded perspective view from the inside of a protective case for a portable electronic device comprising an impact-absorbent insert and a mating user defined enclosure.
  • FIG. 2 is an exploded perspective view from the outside of a protective case for a portable electronic device comprising an impact-absorbent insert and a mating user defined enclosure.
  • Fig. 3 is an exploded perspective view of a web tablet with its protective case comprising an impact-absorbent insert and a mating user defined enclosure.
  • Fig. 4 is a perspective view of a protective case comprising an impact-absorbent insert and a mating user defined enclosure.
  • the impact-absorbing insert 1 as shown in FIG. 1 has an outside surface 2 and an inside surface 3. Further, the impact-absorbing insert has, one or more impact-absorbing portions 4 and one or more tethered plugs 5.
  • At least a portion of the outside surface of the insert is designed to fit within the exterior surface 21 of a user defined enclosure 20.
  • the user defined enclosure comprises a top portion 22 and a bottom portion 23, each having an interior surface 24.
  • the user defined enclosure comprising the impact-absorbing insert comprise a protective case 30 for a portable electronic device 40 (Fig. 4).
  • the outside surface of the impact-absorbing insert must fit tightly against the interior surface of the user defined enclosure. Any means to hold the insert tightly against the user defined enclosure is acceptable, for example, it can be held by an adhesive, a fastener, a mechanical means, or combination thereof. An example of a mechanical means is shown in Fig. 1.
  • the insert is held by fingers 25 which are molded into the interior surface of the user defined enclosure which engage grooves 6 on the outside surface of the insert.
  • the grooves can be on the interior surface of the user defined enclosure and the fingers on the outside surface of the insert or each surface can have one or more groove, one or more finger or any combination thereof.
  • the outside surface of the insert preferably has integral ribs and standoff features 7 that (1) provide clearance to prevent the portable electronic device from contacting the interior surfaces of the user defined enclosure, and/or the ground in a drop impact, and (2) absorb energy resulting from such a drop.
  • the impact-absorbing insert may comprise one or more molded-in button, rib, access tunnel, aesthetics feature, tethered plug, engagement rib, or interference tolerance to enable positive fit and function for the life of the product.
  • the impact-absorbing insert should have sufficient structure to avoid collapse in an impact situation and still be able to absorb the energy resulting from such a drop without damage to the portable electronic device it serves to protect. It is preferable that the insert has adequate flex fatigue resistance so as to recover its original position after being depressed when a drop or other impact occurs. It should be rigid enough to maintain its position within the user defined enclosure during normal use so as to minimize unwanted movement of the portable electronic device within the user defined enclosure.
  • the impact-absorbing insert must have good solvent resistance and good long term creep properties so that it will not sag or warp over time. Further, it is preferable that the impact-absorbing insert have sufficient thermal resistance to enable it to perform its function in a wide range of climate conditions, preferably from - 40°F (-40°C) to 120°F (49°C).
  • the enclosed portable electronic device may generate thermal issues as well and the impact- absorbing insert must withstand these without distortion or lack of performance.
  • the tethered plug 5 is integral with the impact-absorbing portions of the impact-absorbing insert. It comprises a plug portion 9 and a tether portion 10. The plug portion has an outside 11 and an inside surface 12.
  • the tethered plug is designed to initially pass through and then fit snugly back into an opening or access tunnel 26 in the user defined enclosure.
  • the access tunnel allows access from the outside of the user defined enclosure/protective case to the portable electronic device located inside of the user defined enclosure/protective case without the need to open the user defined enclosure/protective case (for example to allow removal of a memory card, replace a battery, attach/detach a synch cable, insert/remove an earphone jack, insert/remove a power cable, etc.).
  • the plug is designed to be insertable and removable from the outside surface of the user defined enclosure while remaining attached to the impact-absorbing portion(s) of the insert, which is on the inside surface of the user defined enclosure, by a tether that passes through the user defined enclosure opening.
  • a tether that passes through the user defined enclosure opening.
  • the impact-absorbing insert may have multiple tethered plugs for sealing matching multiple access tunnels in the user defined enclosure depending on the specific requirements of the portable electronic device which is incased within the protective case.
  • the impact-absorbing insert is molded with a nominal wall thickness equal to or greater than about 2 millimeter (mm) with integral feature (impact-absorbing portion, tether, plug, etc.) thicknesses preferably equal to or greater than about 1 mm, more preferably equal to or greater than about 1.5 mm and most preferably equal to or greater than about 2 mm.
  • the maximum nominal wall and integral feature thicknesses are only limited by what is practical for the specific enclosure and portable electronic device, but generally, they are equal to or less than about 25 mm, preferably equal to or less than about 12 mm, and most preferably equal to or less than about 6 mm.
  • the impact-absorbing insert can be made from any polymeric material which can (1) be manufactured with the necessary geometric design and (2) will hold its shape through time in a wide range of environments when fitted into the user defined enclosure.
  • the polymeric material is a thermoplastic or thermoset elastomer. Suitable elastomers are described, for example, in Billmeyer, F., Textbook of Polymer Science, Interscience Publishers, New York, N.Y. (1965) and in Kirk-Othmer Science of Chemical Technology 4 th Ed, John Wiley & Sons, New York, N.Y. (1993).
  • the impact-absorbing insert can be made from any elastomeric plastic, thermoplastic or thermoset with low modulus and high elasticity.
  • the impact-absorbing insert is made from a material having a hardness between about Shore 40 A to about Shore 65 D.
  • the insert is made from polyamide (PA); polyurethane (PU); polyolefin (PO), such as polyethylene (PE), such as low density polyethylene (LDPE), polypropylene (PP), ethylene and vinyl acetate copolymer (EVA), ethylene and propylene copolymer (EP), polyethylene and alpha-olefin co-polymer, such as ENGAGETM polyolefin elastomers available from The Dow Chemical Company, thermoplastic polyolefin (TPO); polyvinyl chloride (PVC); polyester; polysiloxane; and mixtures thereof.
  • PA polyamide
  • PU polyurethane
  • PO polyolefin
  • PE polyethylene
  • PE low density polyethylene
  • PP polypropylene
  • EVA ethylene and vinyl acetate copolymer
  • EP ethylene and propylene copolymer
  • the impact- absorbing insert is made from a thermoplastic polyurethane (TPU), such as PELLETHANETM 2102-75A polyurethane available from The Dow Chemical Company.
  • TPU thermoplastic polyurethane
  • the impact-absorbing insert of the present invention can be made by any known molding process including injection molding, transfer molding, reaction injection molding, or liquid injection molding.
  • EXAMPLE The following example serves to demonstrate an embodiment of the invention but is not intended to limit the scope of the invention.
  • PELLETHANE 2102-75A thermoplastic polyurethane resin is injection molded into a designed geometry mold cavity in the shape of an impact-absorbing insert measuring 218 mm x 30 mm x 37 mm with a nominal wall thickness of 2 mm.
  • This design is the result of combining the fit functionality between a portable electronic device, a user defined enclosure having two access tunnels, and an impact-absorbing insert with the energy absorbing features (ribs, standoffs, and fingers) and two tethered plugs for the access tunnels. All the geometry necessary for correct functionality is designed into the part and transferred to the metal mold, which reproduces the requisite geometry to all parts manufactured by it. The manufacture of the part is such that each time the mold opens, a complete, impact-absorbing insert is ejected. The impact-absorbing insert contains the necessary impact absorption features and tethered plugs all in one molded article.
  • the PELLETHANE 2102-75A TPU resin is dried at a temperature between 80°C to 95°C and the molding conditions are a melt temperature between 200°C to 215°C with a mold temperature between 15°C to 60°C.
  • An Engel 25mm single screw injection molding machine is used.
  • the resulting impact insert is placed into a user defined enclosure (also molded from
  • PELLETHANE 2102-75A TPU resin having a top and bottom portion, such that the impact- absorbing insert is placed in the top portion and mates with a recess in the top portion of the protective user defined enclosure.
  • a personal electronic device for example a web tablet, is placed in the protective user defined enclosure and fits snuggly against the impact-absorbing insert.
  • the access tunnels in the user defined enclosure line up with the access features of the electronic device and when the tethered plugs on the impact-absorbing insert are inserted into these access tunnels a water and dust tight seal is formed.
  • the top portion of the user defined enclosure is mated with the bottom portion of the user defined enclosure.
  • the resulting protective case provides the encased portable electronic device water and dust resistance, impact protection, and access to features within the user defined enclosure.
  • the protective case comprising a portable electronic device, the user defined enclosure, and the impact-absorbing insert is subjected to the MIL-STD-810F, Table 516.5-VI Transit Drop Test and passes at a minimum of 24 inches.
  • Table 516.5-VI testing protocol is: • To pass, the unit must survive 26 drops at a specific height without damage (defined as impaired functional use) to the portable electronic device. • Up to five units may be used to obtain the 26 drops. • Use five different units for each drop height (24 in. (70 cm), 30 in. (76 cm), 36 in. (91 cm), 42 in. (107 cm), 48 in.
  • the present invention provides a cost effective impact-absorbing insert which combines multiple functionality with parts consolidation and ease of customization that provides good impact protection to the encased portable electronic device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Signal Processing (AREA)
  • Casings For Electric Apparatus (AREA)
  • Buffer Packaging (AREA)
  • Telephone Set Structure (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
  • Packages (AREA)
  • Packaging Frangible Articles (AREA)

Abstract

Une pièce rapportée amortissant les chocs à coût efficace combine de multiples fonctions avec des parties de consolidation et est facilement personnalisable, ce qui permet une application diversifiée à chaque fois qu'une protection contre les impacts s'adapte à une enceinte définie par un utilisateur afin d'obtenir un boîtier protecteur pour tout article fragile utilisé dans un environnement portable, notamment des dispositifs électroniques portables, à savoir des caméras (35mm et numériques), des instruments, des outils, des assistants numériques personnels, des tablettes Web, des ordinateurs portables, des téléphones portables, des télé-avertisseurs, des dispositifs de jeu, des instruments électroniques de reproduction musicale, des enregistreurs vocaux, des systèmes mondiaux de positionnement (GPS) et analogues.
EP04814457A 2004-01-07 2004-12-15 Boitier resistant aux impacts a ouverture obturable Withdrawn EP1719042A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53462404P 2004-01-07 2004-01-07
PCT/US2004/042278 WO2005068303A2 (fr) 2004-01-07 2004-12-15 Boitier resistant aux impacts a ouverture obturable

Publications (1)

Publication Number Publication Date
EP1719042A2 true EP1719042A2 (fr) 2006-11-08

Family

ID=34794299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04814457A Withdrawn EP1719042A2 (fr) 2004-01-07 2004-12-15 Boitier resistant aux impacts a ouverture obturable

Country Status (9)

Country Link
US (1) US20070158220A1 (fr)
EP (1) EP1719042A2 (fr)
JP (1) JP2007518637A (fr)
KR (1) KR20060123442A (fr)
CN (1) CN1902564A (fr)
BR (1) BRPI0417896A (fr)
CA (1) CA2551678A1 (fr)
TW (1) TW200528005A (fr)
WO (1) WO2005068303A2 (fr)

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WO2005068303A3 (fr) 2005-11-17
US20070158220A1 (en) 2007-07-12
KR20060123442A (ko) 2006-12-01
JP2007518637A (ja) 2007-07-12
BRPI0417896A (pt) 2007-04-27
WO2005068303A2 (fr) 2005-07-28
CA2551678A1 (fr) 2005-07-28
CN1902564A (zh) 2007-01-24
TW200528005A (en) 2005-08-16

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