EP2819140A1 - Dome-shaped assembly and handheld electronic device including dome-shaped assembly - Google Patents
Dome-shaped assembly and handheld electronic device including dome-shaped assembly Download PDFInfo
- Publication number
- EP2819140A1 EP2819140A1 EP13173957.5A EP13173957A EP2819140A1 EP 2819140 A1 EP2819140 A1 EP 2819140A1 EP 13173957 A EP13173957 A EP 13173957A EP 2819140 A1 EP2819140 A1 EP 2819140A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dome
- shaped element
- substrate
- electronic device
- concave surface
- 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.)
- Granted
Links
- 239000000758 substrate Substances 0.000 claims description 28
- 230000004044 response Effects 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 description 9
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- -1 Polyethylene terephthalate Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
-
- 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
- H01H13/705—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 characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2215/00—Tactile feedback
- H01H2215/004—Collapsible dome or bubble
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2221/00—Actuators
- H01H2221/09—Flexible integral part of housing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2227/00—Dimensions; Characteristics
- H01H2227/022—Collapsable dome
Definitions
- aspects of the invention are directed to handheld electronic device and, more particularly, to handheld electronic devices includes dome-shaped assemblies.
- handheld electronic devices Numerous types of handheld electronic devices are presently in use. Exemplary handheld electronic devices include personal data assistants (PDAs), handheld computers, two-way pagers and cellular telephones. Many feature wireless communication capability and/or are stand-alone devices that are functional without communication with other devices.
- PDAs personal data assistants
- handheld computers two-way pagers
- cellular telephones Many feature wireless communication capability and/or are stand-alone devices that are functional without communication with other devices.
- Handheld electronic devices are generally intended to be portable, with many being small enough to fit within a pocket, a belt holster, a briefcase or a purse. As the form factor of such devices has shrunk for improved portability, so has the size of components such as keyboards or keypads.
- the keyboards or keypads include keys that act as switches for input entry when actuated.
- one general approach has involved the use of an electrical key in the form of a resilient dome-shaped element that is electrically conductive and is disposed on a circuit board.
- such a dome assembly is a smooth sector of a hollow sphere.
- the dome assembly collapses to thereby complete an electrical circuit.
- the collapsing dome assembly provides a tactile feedback to the user of the handheld electronic device.
- Such simple sphere segments have been generally effective for their intended purpose but often the tactile feedback is not noticeable.
- the dome assemblies are often provided with elastomeric or compliant layers that provide for an improved tactile feel or increase the tactile feel of the dome assembly.
- the elastomeric or compliant layer necessarily increases a thickness or size of the keyboard or keypad.
- FIG. 1 is a front elevational view of a handheld electronic device in accordance with embodiments
- FIG. 2 is a schematic depiction of the electronic device of FIG. 1 ;
- FIG. 3 is a cross-sectional view of a keyboard assembly of the electronic device of FIG. 1 ;
- FIG. 4 is a plan view of a dome-shaped element of the keyboard assembly of FIG. 3 in accordance with embodiments;
- FIG. 5 is a side view of the dome-shaped element in accordance with embodiments.
- FIG. 6 is a graphical depiction of a tactile response curve associated with the dome-shaped element of FIGS. 4 and 5 .
- the electronic device 4 includes a housing 6, an input apparatus 8, an output apparatus 12 and a processor 16 disposed on or in the housing 6.
- the input apparatus 8 provides input to the processor 16 and the processor 16 provides output signals to the output apparatus 12.
- the input apparatus 8 may include a keypad 20 and a navigation input 24.
- the keypad 20 includes a plurality of keys 28 that are each actuatable to provide input to the processor 16.
- the navigation input 24 can be an optical pad, a track pad, capacitive input or a track ball to provide navigational and other input to the processor 16.
- the navigation input 24 may also be translatable to permit selection inputs.
- the navigation input 24 is able to provide navigational inputs in the vertical direction, i.e., the up-down direction, in the horizontal direction, i.e., the left-right direction, as well as combinations thereof.
- the keys 28 and the navigation input 24 serve as input members that are actuatable to provide input to the processor 16.
- the output apparatus 12 may include a display 32, such as a liquid crystal display, LED display, e-ink display, etc.
- many of the keys 28 have a plurality of letters, i.e., linguistic elements, assigned thereto. For instance, one of the keys 28 represents the letters "A" and "S” while another key 28 represents the letters "Q” and "VV".
- the letters of the example keypad 20 are illustrated as being in an arrangement of a reduced QWERTY keyboard. It is to be appreciated, however, that although the example shown in FIG. 1 utilizes a reduced keypad 20, the keys 28 may be provided as a regular (non-reduced) keypad or other combination of one or more individual keys either integral to an electronic device or part of a separate keyboard assembly external to an electronic device.
- Examples of other input members not expressly depicted herein would include, for instance, a mouse or trackwheel for providing navigational inputs. Still other example input members would include a touch-sensitive display, a stylus pen for making menu input selections on a touch-sensitive display displaying menu options and/or soft buttons of a graphical user interface (GUI), hard buttons disposed on the housing 6 of the handheld electronic device 4, and so on. Examples of other output devices would include a touch-sensitive display, an audio speaker, and so on.
- GUI graphical user interface
- the processor 16 includes a processing unit 36 and a memory 40.
- the processing unit 36 may be, for example, a microprocessor ( ⁇ P) that interfaces with the memory 40.
- the memory 40 can be any one or more of a variety of types of internal and/or external storage media, such as RAM, ROM, EPROM(s), EEPROM(s) and FLASH provide a storage register, i.e., a machine readable medium, for data storage.
- the memory 40 can be volatile memory or nonvolatile memory.
- the memory 40 has a number of routines 44 that are stored therein and which are executable on the processing unit 36.
- the deformable dome assembly 50 includes a multiple-sloped dome-shaped element 60 (in some cases, a plurality of dome-shaped elements 60) that is (are) disposable in a keyboard assembly 70 of the input apparatus 8 of the electronic device 4 of FIGS. 1 and 2 .
- the keyboard assembly 70 may be regarded as a component of the dome assembly 50 and includes a substrate 71, spacers 72 and a dome-overlaying laminate 73.
- the substrate 71 is a generally planar or substantially flat surface on which the dome-shaped element 60 is operably disposed.
- the substrate 71 may be, but is not required to be, provided as a printed circuit board (PCB) or as a flexible print circuit (FPC). Where an FPC is employed, the keyboard assembly 70 may further include a stiffening layer 74.
- the spacers 72 are disposed on the substrate 71 to at least partially surround the dome-shaped element 60.
- the laminate 73 may be include a layer of soft Polyethylene terephthalate (PET) film and is supported on at least the spacers 72 such that the laminate 73 is disposed at a distance from the substrate 71. This distance may be substantially similar to the height of the spacers 72. Adhesive may be provided on either side of the spacers 72 to improve adherence between the spacers 72 and the substrate 71 and between the spacers 72 and the laminate 73.
- PET Polyethylene terephthalate
- height of the spacers 72 may be lower than the height of the dome-shaped element 60. In such cases, once the keyboard assembly 70 is formed, the spacers 72 effectively pull the laminate 73 down toward the substrate 71 and over the dome-shaped element 60.
- the dome-shaped element 60 is operably interposed between the substrate 71 and the laminate 73 and includes a convex surface 61 that faces the laminate 73 and a concave surface 62 opposite the convex surface 61.
- the concave surface 62 originates at a center portion 63 of the dome-shaped element 60 and terminates at a periphery (or peripheral portion) 64 of the dome-shaped element 60.
- the concave surface 62 includes an annular array of spring-like or elastic elements 65 that extend from the center portion 63 to the periphery 64.
- at least one or more of the elastic elements 65 includes at least a first portion 66 and a second portion 67.
- the first portion 66 has a first slope S1 and is proximate to the center portion 63.
- the second portion 67 has a second slope S2 and is proximate to the periphery 64.
- each elastic element 65 may be similarly shaped and separated from adjacent elastic elements 65 by uniform distances. However, it is to be understood that this is not required and that more or less elastic elements 65 may be provided.
- the annular array of the elastic elements 65 is illustrated as being substantially balanced and uniformly arranged about the center portion 63, it is to be understood that this is not necessary and that the elastic elements 65 need not be balanced or uniformly arranged about the center portion 63.
- first contact pads 710 and second contact pads 711 which are respectively associated with one or more circuits of the electronic device 4 of FIGS. 1 and 2 , may be disposed on the substrate 71.
- the periphery 64 of the dome-shaped element 60 may be disposed in contact with, for example, the first contact pads 710 and the center portion 63 may be disposed at a distance from the second contact pad 711. That is, in accordance with embodiments, the center portion 63 and the concave surface 62 as a whole is centered at the second contact pad 711.
- the concave surface 62 may be at least partially formed of a conductive material, such as metal or a metallic alloy, and is formed to be deflectable as shown in FIG. 5 between an un-deflected position 610, an intermediately deflected position and a deflected position 612.
- the concave surface 62 is biased to remain in the un-deflected position 610 (see FIG. 5 ).
- the concave surface 62 is deflectable, as noted above, from the un-deflected position 610 in response to a pressing force being applied by a user or some other externality to the center portion 63 in a direction leading to the second contact pad 711. This pressing force causes the concave surface 62 to deflect toward and to eventually assume the deflected position 612 (see FIG. 5 ).
- the center portion 63 may be disposed in contact with the second contact pad 711 while the periphery 64 remains in contact with the first contact pads 710.
- the conductive material of the concave surface 62 may be configured to complete the one or more circuits of the electronic device 4 to thereby affect an operation of the electronic device 4.
- the one or more circuits of the electronic device 4 may be open with the concave surface 62 remaining disposed at or returning to the un-deflected position (i.e., default) 610 in accordance with the bias provided by the elastic elements 65.
- At least a portion 630 of the center portion 63 may be planar or substantially flat such that the portion 630 can abut and lie flush against the laminate 73. In some cases, the portion 630 may be adhered to the laminate 73 as well. The laminate 73 and the portion 630 may also be substantially parallel with the substrate 71.
- the first slope S1 and the second slope S2 may be defined with respect to the slope (or lack thereof) of the center portion 63. In addition, the second slope S2 may be greater than or exceed the first slope S1. It is to be understood, however, that the entirety of the center portion 63 need not be planar or substantially flat and may include various type of surface features.
- Such surface features may include, for example, depressions 631, micro-half cuts, dimples, etc., in the convex surface 61 that can be used to identify for a user where the center portion 63 is located and to improve the tactile feel of the dome assembly 50 as a whole or to collect dust.
- the concave surface 62 may have a wagon-wheel shape with the center portion 63 acting as a hub, the elastic elements 65 acting as spokes and the periphery 64 acting as the tire.
- the elastic elements 65 may all have similar shapes. That is, at least one of the first portions 66 may have substantially similar dimensions as another of the first portions 66 and at least one of the second portions 67 may have substantially similar dimensions as another of the second portions 67.
- the center portion 63 deforms linearly during a ramp-up stage with the linear deformation aided by the tapering of the at least one of the first portions 66. That is, the tapering of the at least one of the first portions 66 provides space in between the elastic elements 65 that permits the center portion 63 to deform into the volume defined by the concave surface 62 in the un-deflected or default position 610.
- the ramp-up stage is extended as compared to conventional dome assemblies and thus improves a tactile response of the dome assembly 50.
- non-linear deformation in the form of dome-buckling occurs along the first portions 66 and/or at the connections between the first portions 66 and the corresponding second portions 67.
- the periphery 64 may have a diameter of about 4-5 millimeters (mm), a height of the concave surface 62 may be about 0.26-0.36 mm and a thickness of the concave surface 62 may be about 0.035-0.06 mm.
- the dome-shaped element 60 as a whole provides for a travel distance between the un-deflected position 610 and the deflected position 612 of about 0.22-0.30 mm. Over that travel distance, the dome-shaped element 60 may be configured to provide a non-linear tactile response to a deflection force identified above as the pressing force.
- the non-linear tactile response is illustrated in FIG. 6 and includes a first part 100 and a second part 101.
- the first part 100 includes the ramp-up stage from an initial point of zero pressing force to a peak pressing force (PF) and is associated with a spring or linear deformation of the center portion 63 as aided by the first portions 66.
- the first part 100 terminates at a deflection of the concave surface 62 of about 0.14-0.28 mm and, more particularly, at a deflection of about 0.22 mm.
- the second part 101 is then associated with a dome-buckling collapse of the first portion 66 of the at least one of the elastic elements 65.
- the second stage terminates at a point proximate to 0.28 mm of travel distance at which the center portion 63 contacts the second contact pads 711 and the second portion 67 of the at least one of the elastic elements 65 resists further pressing force (RF).
- the dome-shaped element 60 provides for multiple advantages over conventional dome assemblies.
- the advantages include, but are not limited to, providing a dome-shaped element 60 for a keyboard assembly 70 that provides a non-linear tactile response to a 2 newtons (N) or less pressing/deflection force but does not include an elastomeric or compliant layer between the dome-shaped element 60 and the laminate 73.
- N 2 newtons
- the keyboard assembly 70 can be thinned as compared to keyboards with conventional dome assemblies without sacrificing tactile feel.
- the relative sizes of the center portion 63, the first portions 66 and the second portions 67 provide for an extended ramp-up stage of the first part 100 of the non-linear tactile response, which, as noted above, terminates at a deflection of the concave surface 62 of about 0.14-0.28 mm.
- the dome-shaped element 60 is formed such that the keyboard assembly 70 in thinned but permits increased ramp-up and travel distance as compared to convention dome assemblies in spite of the thinning. The increased ramp-up and travel distance provide for improved tactile feel.
- a dome-shaped element disposable in a keyboard of an electronic device includes a concave surface originating at a center and terminating at a periphery.
- the concave surface includes an annular array of elastic elements extending from the center to the periphery. At least one of the elastic elements includes a first portion with a first slope proximate to the center and a second portion with a second slope proximate to the periphery.
- the concave surface is deflectable between an un-deflected position and a deflected position and is configured to affect an operation of the electronic device in the deflected position.
- the dome-shaped element includes a concave surface originating at a center and terminating at a periphery disposed in contact with the first contact pad.
- the concave surface includes an annular array of elastic elements extending from the center to the periphery. At least one of the elastic elements includes a first portion with a first slope proximate to the center and a second portion with a second slope proximate to the periphery.
- the concave surface is deflectable between an un-deflected position and a deflected position and is configured such that the center contacts the second contact pad to thereby affect an operation of the electronic device in the deflected position.
- a keyboard assembly for an electronic device includes a substrate, a laminate disposed at a distance from the substrate and a multiple-sloped dome interposed between the laminate and the substrate.
- the multiple-sloped dome includes a peripheral portion contacting the substrate and a central portion contacting the laminate and is formed such that the central portion is biased to remain separated from the substrate and to provide a non-linear tactile response to a pressing force applied to the laminate to thereby urge the central portion into contact with the substrate.
- a dome-shaped element for use with a handheld electronic device and includes concave surface as described above but does not include an elastomeric or compliant layer between the concave surface and the laminate.
- the dome-shaped element is therefore relatively thin but nevertheless provides for an increased ramp-up deflection stage and a non-linear response to a pressing/deflection force.
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- Push-Button Switches (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
Description
- Aspects of the invention are directed to handheld electronic device and, more particularly, to handheld electronic devices includes dome-shaped assemblies.
- Numerous types of handheld electronic devices are presently in use. Exemplary handheld electronic devices include personal data assistants (PDAs), handheld computers, two-way pagers and cellular telephones. Many feature wireless communication capability and/or are stand-alone devices that are functional without communication with other devices.
- Handheld electronic devices are generally intended to be portable, with many being small enough to fit within a pocket, a belt holster, a briefcase or a purse. As the form factor of such devices has shrunk for improved portability, so has the size of components such as keyboards or keypads. The keyboards or keypads include keys that act as switches for input entry when actuated. In order to further miniaturization, one general approach has involved the use of an electrical key in the form of a resilient dome-shaped element that is electrically conductive and is disposed on a circuit board.
- In simplest form, such a dome assembly is a smooth sector of a hollow sphere. When an actuation force is applied to the apex of the dome assembly, the dome assembly collapses to thereby complete an electrical circuit. The collapsing dome assembly provides a tactile feedback to the user of the handheld electronic device. Such simple sphere segments have been generally effective for their intended purpose but often the tactile feedback is not noticeable.
- Thus, the dome assemblies are often provided with elastomeric or compliant layers that provide for an improved tactile feel or increase the tactile feel of the dome assembly. However, the elastomeric or compliant layer necessarily increases a thickness or size of the keyboard or keypad.
- For a more complete understanding of this disclosure, reference is now made to the following brief description, taken in connection with the accompanying drawings and detailed description, wherein like reference numerals represent like parts.
-
FIG. 1 is a front elevational view of a handheld electronic device in accordance with embodiments; -
FIG. 2 is a schematic depiction of the electronic device ofFIG. 1 ; -
FIG. 3 is a cross-sectional view of a keyboard assembly of the electronic device ofFIG. 1 ; -
FIG. 4 is a plan view of a dome-shaped element of the keyboard assembly ofFIG. 3 in accordance with embodiments; -
FIG. 5 is a side view of the dome-shaped element in accordance with embodiments; and -
FIG. 6 is a graphical depiction of a tactile response curve associated with the dome-shaped element ofFIGS. 4 and5 . - With reference to
FIGS. 1 and 2 , a handheld electronic device 4 is provided. The electronic device 4 includes ahousing 6, aninput apparatus 8, anoutput apparatus 12 and aprocessor 16 disposed on or in thehousing 6. Theinput apparatus 8 provides input to theprocessor 16 and theprocessor 16 provides output signals to theoutput apparatus 12. - The
input apparatus 8 may include akeypad 20 and anavigation input 24. Thekeypad 20 includes a plurality ofkeys 28 that are each actuatable to provide input to theprocessor 16. Thenavigation input 24 can be an optical pad, a track pad, capacitive input or a track ball to provide navigational and other input to theprocessor 16. Thenavigation input 24 may also be translatable to permit selection inputs. Thenavigation input 24 is able to provide navigational inputs in the vertical direction, i.e., the up-down direction, in the horizontal direction, i.e., the left-right direction, as well as combinations thereof. Thekeys 28 and thenavigation input 24 serve as input members that are actuatable to provide input to theprocessor 16. Theoutput apparatus 12 may include adisplay 32, such as a liquid crystal display, LED display, e-ink display, etc. - As shown in
FIG. 1 , many of thekeys 28 have a plurality of letters, i.e., linguistic elements, assigned thereto. For instance, one of thekeys 28 represents the letters "A" and "S" while anotherkey 28 represents the letters "Q" and "VV". The letters of theexample keypad 20 are illustrated as being in an arrangement of a reduced QWERTY keyboard. It is to be appreciated, however, that although the example shown inFIG. 1 utilizes a reducedkeypad 20, thekeys 28 may be provided as a regular (non-reduced) keypad or other combination of one or more individual keys either integral to an electronic device or part of a separate keyboard assembly external to an electronic device. - Examples of other input members not expressly depicted herein would include, for instance, a mouse or trackwheel for providing navigational inputs. Still other example input members would include a touch-sensitive display, a stylus pen for making menu input selections on a touch-sensitive display displaying menu options and/or soft buttons of a graphical user interface (GUI), hard buttons disposed on the
housing 6 of the handheld electronic device 4, and so on. Examples of other output devices would include a touch-sensitive display, an audio speaker, and so on. - The
processor 16 includes aprocessing unit 36 and amemory 40. Theprocessing unit 36 may be, for example, a microprocessor (µP) that interfaces with thememory 40. Thememory 40 can be any one or more of a variety of types of internal and/or external storage media, such as RAM, ROM, EPROM(s), EEPROM(s) and FLASH provide a storage register, i.e., a machine readable medium, for data storage. Thememory 40 can be volatile memory or nonvolatile memory. Thememory 40 has a number ofroutines 44 that are stored therein and which are executable on theprocessing unit 36. - Underlying at least one of the plurality of
keys 28 is adeformable dome assembly 50, which will be described below with reference toFIGS. 3-5 and6. As shown inFIG. 3 , thedeformable dome assembly 50 includes a multiple-sloped dome-shaped element 60 (in some cases, a plurality of dome-shaped elements 60) that is (are) disposable in akeyboard assembly 70 of theinput apparatus 8 of the electronic device 4 ofFIGS. 1 and 2 . - The
keyboard assembly 70 may be regarded as a component of thedome assembly 50 and includes asubstrate 71,spacers 72 and a dome-overlayinglaminate 73. Thesubstrate 71 is a generally planar or substantially flat surface on which the dome-shaped element 60 is operably disposed. Thesubstrate 71 may be, but is not required to be, provided as a printed circuit board (PCB) or as a flexible print circuit (FPC). Where an FPC is employed, thekeyboard assembly 70 may further include a stiffening layer 74. Thespacers 72 are disposed on thesubstrate 71 to at least partially surround the dome-shaped element 60. Thelaminate 73 may be include a layer of soft Polyethylene terephthalate (PET) film and is supported on at least thespacers 72 such that thelaminate 73 is disposed at a distance from thesubstrate 71. This distance may be substantially similar to the height of thespacers 72. Adhesive may be provided on either side of thespacers 72 to improve adherence between thespacers 72 and thesubstrate 71 and between thespacers 72 and thelaminate 73. - In accordance with alternative embodiments, height of the
spacers 72 may be lower than the height of the dome-shaped element 60. In such cases, once thekeyboard assembly 70 is formed, thespacers 72 effectively pull thelaminate 73 down toward thesubstrate 71 and over the dome-shaped element 60. - The dome-
shaped element 60 is operably interposed between thesubstrate 71 and thelaminate 73 and includes aconvex surface 61 that faces thelaminate 73 and aconcave surface 62 opposite theconvex surface 61. Theconcave surface 62 originates at acenter portion 63 of the dome-shaped element 60 and terminates at a periphery (or peripheral portion) 64 of the dome-shaped element 60. Theconcave surface 62 includes an annular array of spring-like orelastic elements 65 that extend from thecenter portion 63 to theperiphery 64. As shown inFIGS. 3-5 , at least one or more of theelastic elements 65 includes at least afirst portion 66 and asecond portion 67. Thefirst portion 66 has a first slope S1 and is proximate to thecenter portion 63. Thesecond portion 67 has a second slope S2 and is proximate to theperiphery 64. - In accordance with embodiments, eight
elastic elements 65 may be provided in the annular array with eachelastic element 65 being similarly shaped and separated from adjacentelastic elements 65 by uniform distances. However, it is to be understood that this is not required and that more or lesselastic elements 65 may be provided. In addition, although the annular array of theelastic elements 65 is illustrated as being substantially balanced and uniformly arranged about thecenter portion 63, it is to be understood that this is not necessary and that theelastic elements 65 need not be balanced or uniformly arranged about thecenter portion 63. - As shown in
FIG. 3 ,first contact pads 710 andsecond contact pads 711, which are respectively associated with one or more circuits of the electronic device 4 ofFIGS. 1 and 2 , may be disposed on thesubstrate 71. In such cases, theperiphery 64 of the dome-shapedelement 60 may be disposed in contact with, for example, thefirst contact pads 710 and thecenter portion 63 may be disposed at a distance from thesecond contact pad 711. That is, in accordance with embodiments, thecenter portion 63 and theconcave surface 62 as a whole is centered at thesecond contact pad 711. Theconcave surface 62 may be at least partially formed of a conductive material, such as metal or a metallic alloy, and is formed to be deflectable as shown inFIG. 5 between anun-deflected position 610, an intermediately deflected position and a deflectedposition 612. - Normally, due to the configuration of the
elastic elements 65, theconcave surface 62 is biased to remain in the un-deflected position 610 (seeFIG. 5 ). However, theconcave surface 62 is deflectable, as noted above, from theun-deflected position 610 in response to a pressing force being applied by a user or some other externality to thecenter portion 63 in a direction leading to thesecond contact pad 711. This pressing force causes theconcave surface 62 to deflect toward and to eventually assume the deflected position 612 (seeFIG. 5 ). - With the
concave surface 62 disposed at the deflectedposition 612, thecenter portion 63 may be disposed in contact with thesecond contact pad 711 while theperiphery 64 remains in contact with thefirst contact pads 710. As such, the conductive material of theconcave surface 62 may be configured to complete the one or more circuits of the electronic device 4 to thereby affect an operation of the electronic device 4. By a similar token, the one or more circuits of the electronic device 4 may be open with theconcave surface 62 remaining disposed at or returning to the un-deflected position (i.e., default) 610 in accordance with the bias provided by theelastic elements 65. - At least a
portion 630 of thecenter portion 63 may be planar or substantially flat such that theportion 630 can abut and lie flush against thelaminate 73. In some cases, theportion 630 may be adhered to the laminate 73 as well. The laminate 73 and theportion 630 may also be substantially parallel with thesubstrate 71. In accordance with such embodiments, the first slope S1 and the second slope S2 may be defined with respect to the slope (or lack thereof) of thecenter portion 63. In addition, the second slope S2 may be greater than or exceed the first slope S1. It is to be understood, however, that the entirety of thecenter portion 63 need not be planar or substantially flat and may include various type of surface features. Such surface features may include, for example,depressions 631, micro-half cuts, dimples, etc., in theconvex surface 61 that can be used to identify for a user where thecenter portion 63 is located and to improve the tactile feel of thedome assembly 50 as a whole or to collect dust. - As shown in
FIG. 4 , at least one or more of thefirst portions 66 of theconcave surface 62 may be tapered toward thecenter portion 63. By contrast, thesecond portions 67 may each have a substantially uniform width. This tapering permits thecenter portion 63 to linearly deform in response to the pressing force being applied thereto. In addition, theconcave surface 62 may have a wagon-wheel shape with thecenter portion 63 acting as a hub, theelastic elements 65 acting as spokes and theperiphery 64 acting as the tire. In this case, theelastic elements 65 may all have similar shapes. That is, at least one of thefirst portions 66 may have substantially similar dimensions as another of thefirst portions 66 and at least one of thesecond portions 67 may have substantially similar dimensions as another of thesecond portions 67. - With the configuration described above, as the pressing force is applied to the
center portion 63, thecenter portion 63 deforms linearly during a ramp-up stage with the linear deformation aided by the tapering of the at least one of thefirst portions 66. That is, the tapering of the at least one of thefirst portions 66 provides space in between theelastic elements 65 that permits thecenter portion 63 to deform into the volume defined by theconcave surface 62 in the un-deflected ordefault position 610. As will be noted below, the ramp-up stage is extended as compared to conventional dome assemblies and thus improves a tactile response of thedome assembly 50. At a conclusion of the ramp-up stage, non-linear deformation in the form of dome-buckling occurs along thefirst portions 66 and/or at the connections between thefirst portions 66 and the correspondingsecond portions 67. - In accordance with embodiments, the
periphery 64 may have a diameter of about 4-5 millimeters (mm), a height of theconcave surface 62 may be about 0.26-0.36 mm and a thickness of theconcave surface 62 may be about 0.035-0.06 mm. The dome-shapedelement 60 as a whole provides for a travel distance between theun-deflected position 610 and the deflectedposition 612 of about 0.22-0.30 mm. Over that travel distance, the dome-shapedelement 60 may be configured to provide a non-linear tactile response to a deflection force identified above as the pressing force. - The non-linear tactile response is illustrated in
FIG. 6 and includes a first part 100 and a second part 101. The first part 100 includes the ramp-up stage from an initial point of zero pressing force to a peak pressing force (PF) and is associated with a spring or linear deformation of thecenter portion 63 as aided by thefirst portions 66. The first part 100 terminates at a deflection of theconcave surface 62 of about 0.14-0.28 mm and, more particularly, at a deflection of about 0.22 mm. The second part 101 is then associated with a dome-buckling collapse of thefirst portion 66 of the at least one of theelastic elements 65. The second stage terminates at a point proximate to 0.28 mm of travel distance at which thecenter portion 63 contacts thesecond contact pads 711 and thesecond portion 67 of the at least one of theelastic elements 65 resists further pressing force (RF). - The dome-shaped
element 60 provides for multiple advantages over conventional dome assemblies. The advantages include, but are not limited to, providing a dome-shapedelement 60 for akeyboard assembly 70 that provides a non-linear tactile response to a 2 newtons (N) or less pressing/deflection force but does not include an elastomeric or compliant layer between the dome-shapedelement 60 and the laminate 73. Thus, thekeyboard assembly 70 can be thinned as compared to keyboards with conventional dome assemblies without sacrificing tactile feel. In addition, the relative sizes of thecenter portion 63, thefirst portions 66 and thesecond portions 67 provide for an extended ramp-up stage of the first part 100 of the non-linear tactile response, which, as noted above, terminates at a deflection of theconcave surface 62 of about 0.14-0.28 mm. In other words, the dome-shapedelement 60 is formed such that thekeyboard assembly 70 in thinned but permits increased ramp-up and travel distance as compared to convention dome assemblies in spite of the thinning. The increased ramp-up and travel distance provide for improved tactile feel. - As described above, a dome-shaped element disposable in a keyboard of an electronic device is provided and includes a concave surface originating at a center and terminating at a periphery. The concave surface includes an annular array of elastic elements extending from the center to the periphery. At least one of the elastic elements includes a first portion with a first slope proximate to the center and a second portion with a second slope proximate to the periphery. The concave surface is deflectable between an un-deflected position and a deflected position and is configured to affect an operation of the electronic device in the deflected position.
- In addition, a dome assembly for use in an electronic device keyboard is provided and includes a substrate comprising first and second contact pads, a laminate disposed at a distance from the substrate and a dome-shaped element interposed between the laminate and the substrate. The dome-shaped element includes a concave surface originating at a center and terminating at a periphery disposed in contact with the first contact pad. The concave surface includes an annular array of elastic elements extending from the center to the periphery. At least one of the elastic elements includes a first portion with a first slope proximate to the center and a second portion with a second slope proximate to the periphery. The concave surface is deflectable between an un-deflected position and a deflected position and is configured such that the center contacts the second contact pad to thereby affect an operation of the electronic device in the deflected position.
- Further, a keyboard assembly for an electronic device is provided and includes a substrate, a laminate disposed at a distance from the substrate and a multiple-sloped dome interposed between the laminate and the substrate. The multiple-sloped dome includes a peripheral portion contacting the substrate and a central portion contacting the laminate and is formed such that the central portion is biased to remain separated from the substrate and to provide a non-linear tactile response to a pressing force applied to the laminate to thereby urge the central portion into contact with the substrate.
- Finally, a dome-shaped element is provided for use with a handheld electronic device and includes concave surface as described above but does not include an elastomeric or compliant layer between the concave surface and the laminate. The dome-shaped element is therefore relatively thin but nevertheless provides for an increased ramp-up deflection stage and a non-linear response to a pressing/deflection force.
- While several embodiments have been provided in the present disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of the present disclosure. The present examples are to be considered as illustrative and not restrictive, and the intention is not to be limited to the details given herein. For example, the various elements or components may be combined or integrated in another system or certain features may be omitted or not implemented.
- Techniques, systems, subsystems and methods described and illustrated in the various embodiments as discrete or separate may be combined or integrated with other systems, modules, techniques, or methods without departing from the scope of the present disclosure. Other items shown or discussed as coupled or directly coupled or communicating with each other may be indirectly coupled or communicating through some interface, device, or intermediate component, whether electrically, mechanically or otherwise. Other examples of changes, substitutions, and alterations are ascertainable by one skilled in the art and could be made without departing from the spirit and scope disclosed herein.
Claims (15)
- A dome-shaped element (600) disposable in a keyboard of an electronic device (4) and comprising:a concave surface (62) originating at a center (63) and terminating at a periphery (64);the concave surface (62) comprising an annular array of elastic elements (65) extending from the center (63) to the periphery (64), at least one of the elastic elements (65) comprising a first portion (66) with a first slope proximate to the center (63) and a second portion (67) with a second slope proximate to the periphery (64); andthe concave surface (62) being deflectable between an un-deflected position (610) and a deflected position (612) and configured to affect an operation of the electronic device (4) in the deflected position (612).
- The dome-shaped element (60) according to claim 1, wherein the concave surface (62) comprises a conductive material that completes a circuit in the deflected position (612) and forms an open circuit in the un-deflected position (610).
- The dome-shaped element (6) according to claim 1, wherein the first and second slopes are defined with respect to the center (63).
- The dome-shaped element (60) according to claim 3, wherein the center (63) includes a portion (630) that is substantially planar.
- The dome-shaped element (60) according to claim 3, wherein the second slope of the at least one of the elastic elements exceeds the first slope.
- The dome-shaped element (60) according to claim 1, wherein at least one of the first portions (66) is tapered toward the center (63).
- The dome-shaped element (60) according to claim 1, wherein at least one of the first portions (66) has substantially similar dimensions as another of the first portions (66) and at least one of the second portions (67) has substantially similar dimensions as another of the second portions (67).
- The dome-shaped element (60) according to claim 1, wherein the periphery (64) has a diameter of about 4-5 mm and a travel distance between the un-deflected and deflected positions is about 0.22-0.30 mm.
- The dome-shaped element (60) according to claim 1, wherein the dome-shaped element (60) is configured to provide a non-linear tactile response to a deflection force.
- The dome-shaped element (60) according to claim 9, wherein the non-linear tactile response comprises:a first part (100) associated with a linear deformation of the center (63); anda second part (101) associated with a collapse of the first portion (66) of the at least one of the elastic elements (65).
- The dome-shaped element (60) according to claim 10, wherein the first part (66) terminates at a deflection of the concave surface (62) of about 0.14-0.28 mm.
- The dome-shaped element (60) according to claim 1, wherein the electronic device (4) comprises:a housing (6);a processor (16) disposed in the housing (6);an input apparatus (8), including the keyboard, supportively disposed on the housing (6); andan output apparatus (12) supportively disposed on the housing (6).
- The dome-shaped element (60) according to claim 1, wherein the electronic device (4) comprises a handheld device.
- The dome-shaped element (60) according to claim 1, wherein the keyboard comprises:a substrate (71) on which the dome-shaped element (60) is operably disposed; anda laminate (73) disposed at a distance from the substrate (71);the dome-shaped element (60) being interposed between the substrate (71) and the laminate (73).
- A keyboard assembly (70) for an electronic device (4), the keyboard assembly (70) comprising:a substrate (71);a laminate (73) disposed at a distance from the substrate (71);a multiple-sloped dome (60) interposed between the laminate (73) and the substrate (71);the multiple-sloped dome (60) comprising a peripheral portion (64) contacting the substrate (71) and a central portion (63) contacting the laminate (73) and being formed such that the central portion (63) is biased to remain separated from the substrate (71) and to provide a non-linear tactile response to a pressing force applied to the laminate (73) to thereby urge the central portion (63) into contact with the substrate (71).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13173957.5A EP2819140B1 (en) | 2013-06-27 | 2013-06-27 | Dome-shaped assembly and handheld electronic device including dome-shaped assembly |
CA2855237A CA2855237C (en) | 2013-06-27 | 2014-06-26 | Dome-shaped assembly and handheld electronic device including dome-shaped assembly |
HK15106107.0A HK1205589A1 (en) | 2013-06-27 | 2015-06-26 | Dome-shaped assembly and handheld electronic device including dome- shaped assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13173957.5A EP2819140B1 (en) | 2013-06-27 | 2013-06-27 | Dome-shaped assembly and handheld electronic device including dome-shaped assembly |
Publications (2)
Publication Number | Publication Date |
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EP2819140A1 true EP2819140A1 (en) | 2014-12-31 |
EP2819140B1 EP2819140B1 (en) | 2019-05-08 |
Family
ID=48740891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13173957.5A Active EP2819140B1 (en) | 2013-06-27 | 2013-06-27 | Dome-shaped assembly and handheld electronic device including dome-shaped assembly |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2819140B1 (en) |
CA (1) | CA2855237C (en) |
HK (1) | HK1205589A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106104429A (en) * | 2015-02-13 | 2016-11-09 | 先进矽有限公司 | Active pen with tip pressure sensor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0764958A2 (en) * | 1995-09-21 | 1997-03-26 | Fuji Polymertech Co., Ltd | Short-stroke dome-shaped disc film spring |
EP1225607A2 (en) * | 2001-01-18 | 2002-07-24 | Alps Electric Co., Ltd. | Dome-shaped contact |
US20020130024A1 (en) * | 2001-02-14 | 2002-09-19 | Kenichiro Kawaguchi | Dome switch |
JP2010146737A (en) * | 2008-12-16 | 2010-07-01 | Fuji Denshi Kogyo Kk | Contact spring with two-step click |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4751351A (en) * | 1987-05-11 | 1988-06-14 | Eaton Corporation | Switch assembly providing tactile feel |
US20110242041A1 (en) * | 2010-04-01 | 2011-10-06 | Nokia Corporation | Method and Apparatus for Performing a Function |
-
2013
- 2013-06-27 EP EP13173957.5A patent/EP2819140B1/en active Active
-
2014
- 2014-06-26 CA CA2855237A patent/CA2855237C/en active Active
-
2015
- 2015-06-26 HK HK15106107.0A patent/HK1205589A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0764958A2 (en) * | 1995-09-21 | 1997-03-26 | Fuji Polymertech Co., Ltd | Short-stroke dome-shaped disc film spring |
EP1225607A2 (en) * | 2001-01-18 | 2002-07-24 | Alps Electric Co., Ltd. | Dome-shaped contact |
US20020130024A1 (en) * | 2001-02-14 | 2002-09-19 | Kenichiro Kawaguchi | Dome switch |
JP2010146737A (en) * | 2008-12-16 | 2010-07-01 | Fuji Denshi Kogyo Kk | Contact spring with two-step click |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106104429A (en) * | 2015-02-13 | 2016-11-09 | 先进矽有限公司 | Active pen with tip pressure sensor |
Also Published As
Publication number | Publication date |
---|---|
CA2855237A1 (en) | 2014-12-27 |
EP2819140B1 (en) | 2019-05-08 |
CA2855237C (en) | 2021-11-16 |
HK1205589A1 (en) | 2015-12-18 |
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