EP2270824B1 - Tastatur mit Wasser- und Staubschutz - Google Patents

Tastatur mit Wasser- und Staubschutz Download PDF

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Publication number
EP2270824B1
EP2270824B1 EP10188124A EP10188124A EP2270824B1 EP 2270824 B1 EP2270824 B1 EP 2270824B1 EP 10188124 A EP10188124 A EP 10188124A EP 10188124 A EP10188124 A EP 10188124A EP 2270824 B1 EP2270824 B1 EP 2270824B1
Authority
EP
European Patent Office
Prior art keywords
keypad
sealing bead
actuators
silicone rubber
light guide
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.)
Active
Application number
EP10188124A
Other languages
English (en)
French (fr)
Other versions
EP2270824A1 (de
Inventor
Dietmar Wennemer
Chao Chen
Timothy Herbert Kyowski
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.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
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 Research in Motion Ltd filed Critical Research in Motion Ltd
Publication of EP2270824A1 publication Critical patent/EP2270824A1/de
Application granted granted Critical
Publication of EP2270824B1 publication Critical patent/EP2270824B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/86—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the casing, e.g. sealed casings or casings reducible in size
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/88—Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements
    • H01H2219/044—Edge lighting of layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/062—Light conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/002—Casings sealed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/044—Injection moulding
    • H01H2229/048—Insertion moulding

Definitions

  • the present application relates generally to keypads, and more particularly, to a keypad intended for portable or handheld communication devices.
  • the portability and convenience of mobile or handheld communication devices has resulted in their widespread use and popularity.
  • the portability of handheld communication devices also makes them more susceptible to exposure to outdoor elements and hazards, such as moisture (e.g. rain, sleet, and snow), dust, and other environmental elements.
  • EP 1737010 A discloses a push-button switch cover member having a hard base and a keypad formed of a silicone rubber film covering the entire back surface of the hard base.
  • EP 1619703 A discloses a key sheet having a base sheet formed by a hard resin base plate and a holding/receiving portion formed of a rubber like elastic material extending around the periphery of the base plate.
  • EP 1467391 A discloses a key pad comprising a key sheet formed by a hard resin plate having a reinforcing outer frame formed of a thermoplastic elastomer extending around the periphery of the hard resin plate.
  • the present application is directed generally to a keypad and structure that may provide protection against elements such as water, dust and/or electrostatic discharge.
  • Embodiments according to the present application are generally directed to a keypad assembly and structure configured to preferably provide a seal against environmental elements or agents, such as water/moisture, dust and/or ESD (Electro-Static Discharge).
  • environmental elements or agents such as water/moisture, dust and/or ESD (Electro-Static Discharge).
  • an actuator component for a keypad comprising: a plurality of actuators formed from silicone rubbber a light guide comprising a plastic material co-molded with said plurality of actuators; and a sealing bead being formed from said silicone rubber and co-molded with said plastic light guide and said raised sealing bead being configured for compression in a channel configured in the keypad.
  • said scaling bead has a height dimension in the range of 0.05 to 0.15 mm.
  • a process for manufacturing a keypad insert for a keypad comprising: providing a plurality of actuators formed from silicone rubber; providing a light guide formed from a plastic material; providing a raised sealing bead formed from silicone rubber and configured for compression in a gap configured in the keypad; bonding together said plurality of actuators, said light guide and said sealing bead using co-molding.
  • said sealing bead extends around a perimeter line of the keypad insert.
  • Fig. 1 shows in diagrammatic form a keypad according to an embodiment
  • Fig. 2 shows in diagrammatic form the keypad of Fig. 1 mounted on a substrate or carrier component in a communication device;
  • Fig. 3 shows in diagrammatic form a bottom view of a keypad actuator according to an embodiment
  • Fig. 4 is a more detailed view of a portion of the keypad actuator depicted in Fig. 3 ;
  • Fig. 5 is a bottom view of the keypad of Fig. 1 ;
  • Fig. 6 is a more detailed view of a portion of the keypad of Fig. 5 ;
  • Fig. 7 is a partial cross-sectional view of the keypad taken along line 1-1 of Fig. 1 ;
  • Fig. 8 is a bottom view of the keypad of Fig. 5 with a dome overlay in place.
  • Fig. 1 shows in diagrammatic form a keypad assembly according to an embodiment and indicated generally by reference 100.
  • Fig. 2 shows the keypad assembly 100 installed, fitted or otherwise mounted or affixed to a printed circuit board (PCB) or other substrate, carrier or structural member for a communication device (e.g. a mobile or handheld), indicated generally by reference 200.
  • the PCB 200 is configured with key-switches or contacts for the keypad and other electronic components in known manner.
  • the keypad 100 comprises, according to an embodiment, a base-frame or member 102, a plurality of keys indicated by 110, a menu key 112,an ESC key 114, a phone call key 116 and an end phone call key 118.
  • the base-frame or member 102 comprises a structural component which may be formed as a plastic frame (e.g. rigid or semi-rigid), and the keys or groups of keys are operatively coupled to the base frame 102.
  • the keys are configured as a QWERTY type keypad.
  • the keypad 100 may include one or more decoration bars or "frets" 120, indicated individually by references 120a, 120b, 120c and 120d.
  • the frets 120 may be formed as part of the base-frame 102 or attached as separate components.
  • the keypad assembly may include a socket for a "trackball" (indicated by reference 210 in Fig. 2 ) or other pointer moving mechanism, indicated generally by reference 130.
  • the keypad 100 i.e. the base-frame 102
  • the edge structure 140 is configured to function in a light guide.
  • Figs. 3 and 4 shows a keypad actuator component or insert according to an embodiment and indicated generally by reference 300 in Fig. 3 .
  • the keypad actuator or insert 300 is formed from or comprises multiple materials.
  • the keypad actuator 300 comprises a light-guide indicated by reference 310, deflection webs 320 and actuators 330.
  • the light-guide 310 is formed from a clear or semi-clear plastic material (rigid or semi-rigid) that is co-molded with a corresponding deflection web 320 and actuator 330 for each of the keys.
  • the actuators 330 are formed from a resilient material such as silicone material.
  • the deflection webs 320 have enough inherent stiffness to hold the keys in their correct position when not pressed, and to yield enough when a user exerts a downward force on the key to bring the associated actuator 330 in contact with the corresponding key-switch component on the PCB 200 ( Fig. 2 ).
  • the actuators 330 are formed from a flexible material such as silicone rubber, for example, to provide deflection for tactile feedback to a user.
  • each of the actuators 330 comprises a contact dome structure that is configured to function with a dome overlay component, for example, as indicated by reference 800 in Fig. 8 .
  • the dome overlay component 800 provides the interface between the keypad 100 and the PCB 200.
  • the dome overlay component 800 includes key-switches indicated by reference 810 for each of the actuators 330 ( Fig. 3 ).
  • the kcy-switchcs 810 are configured to generate a keypad signal on the PCB 200 in response to the depression of the associated actuator 330 and key 110 ( Fig. 1 ) on the keypad 100.
  • the dome overlay 800 also includes openings or cut-outs for LEDs configured to provide a backlighting source.
  • the keypad actuator or insert 300 includes a sealing structure indicated by reference 360.
  • the sealing structure 360 comprises a continuous bead, protrusion or raised ridge which runs around the perimeter of the keypad actuator 300 as depicted in Fig. 3 .
  • the sealing structure 360 is formed from a resilient or a compressible material, such as silicone rubber.
  • the silicon rubber for the sealing structure or ridge 360 is co-molded in the keypad actuator or insert 300, which comprises the light-guide 310, the deflection webs 320 and the actuators 330.
  • the sealing structure 360 is formed from silicone rubber with a height in the range of 0.05 to 0.15 mm and a width in the range of 0.3 to 3.0 mm, although it will be appreciated that other dimensions may be utilized to suit the application.
  • the height of the sealing structure 360 is taken as the height above the edge of the keypad, i.e. the surface of the edge structure 140, for example, as depicted in Fig. 7 .
  • the keypad actuator 300 includes backlight pockets or sockets indicated by reference 350.
  • the backlight pockets 350 receive a light source 352 (e.g. a light emitting diode or LED).
  • the LEDs 352 are mounted on and powered from the PCB 200 ( Fig. 2 ).
  • the keys in the keypad 100 comprise transparent or semi-transparent keycaps that permit passage of light from the light sources 352 to provide a lighted keypad. To prevent light from the backlighting sources (i.e.
  • the base-frame 102 includes the edge structure 140 which serves to provide a backlight shielding function.
  • the edge structure 140 comprises a dark (e.g. black) plastic edge that runs substantially around the perimeter of the keypad 100 or basc-framc 102 and functions to block the transmission of light emitted by the light sourcc(s) for backlighting the keypad.
  • the edge structure 140 also serves to define a cavity or compartment which can assist in the positioning and/or insertion of the keypad actuator layer 300.
  • the sealing structure 360 rests on the surface of the PCB 200.
  • a sealing structure 360 formed from silicone rubber allows the seal 360 to be compressed against the surface of the PCB 200, which serves to improve the sealing properties.
  • the keypad 100 includes a space (i.e. a channel or gap) indicated by reference 700.
  • the space or gap 700 runs along the sealing structure 360 and is formed between the edge 140 and the dome overlay.
  • the gap 700 provides a space to allow the sealing structure to be compressed when the keypad is assembled, i.e. a force applied during the keypad assembly procedure.
  • the gap 700 has a height in the range of 0.05 to 0.10 mm although it will be appreciated that other dimensions may be appropriate.
  • the sealing structure 360 when compressed against the surface of the PCB 200, for example, as depicted in Fig. 7 , provides a seal or barrier to prevent the entry of moisture and/or dust and/or electrostatic discharge into the keypad 100.
  • the keypad actuator 300 is formed from multiple materials using a co-molding process.
  • the deflection webs 320, the actuators 330 and the sealing bead or protrusion 360 are formed from a first resilient or a compressible material such as silicone rubber, and the light guide 310 is formed from a second material such as a rigid or semi-rigid plastic material. According to an embodiment, this allows the sealing bead or protrusion to be formed at the same time as the actuators 330 and an integral element of the keypad actuator 300.
  • the keypad 100 may be installed or implemented with a mobile communication device.
  • the mobile communication device comprises electronic circuitry and components configured and/or assembled on the PCB 200.
  • the electronic circuitry includes a central processing unit or CPU, which operates under the control of a program (i.e. firmware or software) stored in program memory.
  • the CPU is also provided with data memory.
  • the CPU is operatively coupled to the keypad 100 and the trackball 210 ( Fig. 2 ), i.e. input devices, a display module and an audio transducer or speaker.
  • the program memory may include other applications, such as a browser program.
  • the mobile communication device also includes circuitry for wireless communication with a wireless network. The particular implementation details of the mobile communication device will be within the understanding of those skilled in the art, and are therefore not described in further detail.

Landscapes

  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Telephone Set Structure (AREA)
  • Switches With Compound Operations (AREA)

Claims (4)

  1. Eine Aktuatorkomponente (300) für eine Tastatur (100), bestehend aus:
    einer Vielzahl von aus Silikongummi geformten Aktuatoren (330),
    einem Lichtleiter (310) bestehend aus einem mit der Vielzahl von Aktuatoren (330) im Verbund gegossenen Kunststoffmaterial,
    dadurch gekennzeichnet, dass die Aktuatorkomponente weiter einen aus dem besagten Silikongummi geformten und mit dem besagten Kunststofflichtleiter (310) im Verbund gegossenen Dichtwulst (360) umfasst, wobei der besagte erhöhte Dichtwulst (360) so ausgeführt ist, dass er in einem auf der Tastatur vorgesehenen Spalt zusammengepresst werden kann.
  2. Die Aktuatorkomponente nach Anspruch 1, dadurch gekennzeichnet, dass der besagte Dichtwulst eine Höhe von 0,05 mm bis 0,15 mm aufweist.
  3. Ein Fertigungsverfahren für einen Tastatureinsatz (300) für eine Tastatur, bestehend aus:
    der Bereitstellung einer Vielzahl von aus Silikongummi geformten Aktuatoren (330),
    der Bereitstellung eines aus einem Kunststoffmaterial geformten Lichtleiters (310),
    dadurch gekennzeichnet, dass das Fertigungsverfahren weiter die Bereitstellung eines aus Silikongummi geformten erhöhten Dichtwulsts (360) umfasst, wobei der Dichtwulst so ausgeführt ist, dass er in einem auf der Tastatur vorgesehenen Spalt zusammengepresst werden kann,
    wobei die besagte Vielzahl von Aktuatoren (330), der besagte Lichtleiter (310) und der besagte Dichtwulst (360) im Verbund gegossen sind.
  4. Das Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass der besagte Dichtwulst außen um den Tastatureinsatz herumführt.
EP10188124A 2008-03-18 2008-03-18 Tastatur mit Wasser- und Staubschutz Active EP2270824B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08152961A EP2104126B1 (de) 2008-03-18 2008-03-18 Tastatur mit Wasser- und Staubschutz

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP08152961.2 Division 2008-03-18

Publications (2)

Publication Number Publication Date
EP2270824A1 EP2270824A1 (de) 2011-01-05
EP2270824B1 true EP2270824B1 (de) 2011-11-09

Family

ID=39339819

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10188124A Active EP2270824B1 (de) 2008-03-18 2008-03-18 Tastatur mit Wasser- und Staubschutz
EP08152961A Active EP2104126B1 (de) 2008-03-18 2008-03-18 Tastatur mit Wasser- und Staubschutz

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08152961A Active EP2104126B1 (de) 2008-03-18 2008-03-18 Tastatur mit Wasser- und Staubschutz

Country Status (5)

Country Link
EP (2) EP2270824B1 (de)
CN (1) CN201893261U (de)
AT (2) ATE492898T1 (de)
CA (1) CA2657735C (de)
DE (1) DE602008004090D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2362405B1 (de) * 2010-02-25 2016-05-04 BlackBerry Limited Tastaturen für mobile Vorrichtungen und Herstellungsverfahren dafür
US9075576B2 (en) 2010-02-25 2015-07-07 Blackberry Limited Keypads for mobile devices and method of manufacturing the same
CN205725872U (zh) * 2016-03-17 2016-11-23 中兴通讯股份有限公司 一种按键和终端

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000151772A (ja) * 1998-11-12 2000-05-30 Matsushita Electric Ind Co Ltd 携帯端末装置
US7262379B2 (en) 2003-04-11 2007-08-28 Polymatech Co., Ltd. Key sheets and method of producing the same
US7525061B2 (en) 2004-03-25 2009-04-28 Shin-Etsu Polymer Co., Ltd. Cover member for push-button switch and method of manufacturing the same
JP4468096B2 (ja) 2004-07-20 2010-05-26 ポリマテック株式会社 キーシート及びキーシートの製造方法
JP2008041431A (ja) * 2006-08-07 2008-02-21 Sunarrow Ltd キーシート及びそれを備えたキーユニット並びにキーシートの製造方法

Also Published As

Publication number Publication date
DE602008004090D1 (de) 2011-02-03
HK1136085A1 (en) 2010-06-18
CA2657735A1 (en) 2009-09-18
EP2104126B1 (de) 2010-12-22
ATE492898T1 (de) 2011-01-15
EP2270824A1 (de) 2011-01-05
EP2104126A1 (de) 2009-09-23
CA2657735C (en) 2013-08-27
ATE533167T1 (de) 2011-11-15
CN201893261U (zh) 2011-07-06

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