US20220122788A1 - Keyswitch structure and keyboard therewith - Google Patents
Keyswitch structure and keyboard therewith Download PDFInfo
- Publication number
- US20220122788A1 US20220122788A1 US17/317,889 US202117317889A US2022122788A1 US 20220122788 A1 US20220122788 A1 US 20220122788A1 US 202117317889 A US202117317889 A US 202117317889A US 2022122788 A1 US2022122788 A1 US 2022122788A1
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- US
- United States
- Prior art keywords
- keycap
- switch
- multilayer structure
- light
- keyswitch
- 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.)
- Abandoned
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Classifications
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- 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
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- 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
- H01H13/83—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 legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2221/00—Actuators
- H01H2221/07—Actuators transparent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2223/00—Casings
- H01H2223/044—Protecting cover
Definitions
- the present invention relates to a keyswitch structure and a keyboard, and more particularly to a keyswitch structure with protective outer layer and a keyboard with the keyswitch structure.
- Common keyboards have a plurality of keycaps for users to press for input.
- the keycap usually has some characters (including text, symbols, and so on) thereon, for users to recognize and press the keycap quickly and correctly.
- the Characters can be formed by printing, engraving, hollowed-out layered structures, etc., and have a spatial structure.
- the finger may rub the characters. After long-term rubbing, the characters may be damaged or even disappear.
- Some keyboards have a protective outer layer that covers all keycaps. However, when the finger touches and presses the protective outer layer corresponding to the keycap to be pressed, the portion of the protective outer layer may still rub the characters on the keycap. Similarly, after long-term rubbing, the characters will still be damaged or even disappear.
- An objective of the invention is to provide a keyswitch structure, which uses a rigid light-transmissive cover sheet to cover a character structure to protect the character structure.
- a keyswitch structure includes a switch and a multilayer structure disposed above the switch.
- the multilayer structure includes an inner flexible layer, a rigid light-transmissive cover sheet, and a flexible light-transmissive layer.
- the inner flexible layer has a keycap portion and a connection portion extending outward from the keycap portion.
- the keycap portion is located above the switch and forms a spatial character structure.
- the rigid light-transmissive cover sheet is disposed on the keycap portion and covers the spatial character structure.
- the flexible light-transmissive layer covers the inner flexible layer and the rigid light-transmissive cover sheet. Thereby, the rigid light-transmissive cover sheet can protect spatial character structure from structural damage caused by rubbing when the flexible light-transmissive layer is pressed by a finger of a user.
- An objective of the invention is to provide a keyboard, which includes the above keyswitch structure and therefore can use the rigid light-transmissive cover sheet to protect the character structure.
- a keyboard according to the invention includes a keyswitch structure and a device casing carrying the keyswitch structure.
- the keyswitch structure includes a switch and a multilayer structure disposed above the switch.
- the multilayer structure is fixed to the device casing and includes an inner flexible layer, a rigid light-transmissive cover sheet, and a flexible light-transmissive layer.
- the inner flexible layer has a keycap portion and a connection portion extending outward from the keycap portion.
- the keycap portion is located above the switch and forms a spatial character structure.
- the rigid light-transmissive cover sheet is disposed on the keycap portion and covers the spatial character structure.
- the flexible light-transmissive layer covers the inner flexible layer and the rigid light-transmissive cover sheet.
- the rigid light-transmissive cover sheet can protect spatial character structure from structural damage caused by rubbing when the flexible light-transmissive layer is pressed by a finger of a user.
- FIG. 1 is schematic diagram illustrating a keyboard according to a first embodiment.
- FIG. 2 is a partially-exploded view of the keyboard in FIG. 1 .
- FIG. 3 is an exploded view of a multilayer structure in FIG. 2 .
- FIG. 4 is a sectional view of the keyboard in FIG. 1 along the line X-X.
- FIG. 5 is a sectional view of the keyboard in FIG. 4 when a first keycap thereof is pressed.
- FIG. 6 is schematic diagram illustrating a keyboard according to a second embodiment.
- FIG. 7 is a sectional view of the keyboard in FIG. 6 along the line Y-Y.
- FIG. 8 is a sectional view of a variant of the keyboard in FIG. 4 .
- FIG. 9 is a sectional view of a variant of the keyboard in FIG. 4 .
- FIG. 10 is a sectional diagram illustrating a layered structure for forming the multilayer structure in FIG. 2 .
- FIG. 11 is a sectional diagram illustrating another layered structure for forming the multilayer structure in FIG. 2 .
- FIG. 12 is a sectional diagram illustrating the combination of the layered structures in FIG. 10 and FIG. 11 .
- FIG. 13 is a sectional diagram illustrating the combination of the layered structures in FIG. 12 when being shaped.
- a keyboard 1 includes a keyboard body 12 , a multilayer structure 14 , and a lower flexible layer 16 .
- the multilayer structure 14 and the lower flexible layer 16 are disposed on the upper and lower sides of the keyboard body 12 respectively and are joined to completely encapsulate the keyboard body 12 to produce waterproof and dustproof effects.
- the multilayer structure 14 is flexible, so that users can implement input operations on the keyboard body 12 by pressing the multilayer structure 14 .
- the keyboard body 12 includes a device casing 122 , and a bottom plate 124 , a plurality of keycaps (including a first keycap 126 a and a second keycap 126 b ), a plurality of lift mechanisms (including a first lift mechanism 128 a and a second lift mechanism 128 b ), a switch circuit board 130 , and a plurality of resilient restoration parts (including a first resilient restoration part 132 a and a second resilient restoration part 132 b ) which are carried by the device casing 122 .
- the device casing 122 includes an upper casing 1222 and a lower casing 1224 . The upper casing 1222 and the lower casing 1224 are connected to form an accommodating space 122 a .
- the bottom plate 124 is placed on the lower casing 1224 in the accommodating space 122 a .
- the plurality of keycaps are disposed above the bottom plate 124 and exposed from the upper casing 1222 .
- the plurality of lift mechanisms are connected to and between the keycaps and the bottom plate 124 , so that the plurality of keycaps can move up and down relative to the bottom plate 124 in a vertical direction Dv (indicated by a double-headed arrow).
- Each keycap corresponds to one lift mechanism, e.g., scissors supports, butterfly supports, or other mechanisms capable of moving the corresponding keycap up and down.
- the lift mechanism of the longer keycaps can be achieved by a plurality of scissors supports, butterfly supports, or a combination thereof.
- the switch circuit board 130 is placed on the bottom plate 124 in the accommodating space 122 a and has a plurality of switches (including a first switch 130 a and a second switch 130 b ). Each switch corresponds to one keycap.
- the longer keycap can correspond to multiple switches.
- the plurality of resilient restoration parts are disposed between the plurality of keycaps and the bottom plate 124 in the accommodating space 122 a . Each resilient restoration part corresponds to one keycap.
- the longer keycap can correspond to multiple resilient restoration parts.
- the resilient restoration part can be squeezed (e.g. by the corresponding downwardly moving keycap) to elastically deform. The resilience of the squeezed resilient restoration part can drive the corresponding keycap to move upward and return to its original position.
- the upper casing 1222 is a structural frame.
- the first keycap 126 a is located above the first switch 130 a and exposed from a first window 1222 a of the upper casing 1222 (which communicates with the accommodating space 122 a ).
- the first lift mechanism 128 a is connected to and between the first keycap 126 a and the bottom plate 124 .
- the first resilient restoration part 132 a is located between the first keycap 126 a and the first switch 130 a .
- the first keycap 126 a moves toward the first switch 130 a in the vertical direction Dv (e.g., by a user pressing the first keycap 126 a through the multilayer structure 14 ), the first keycap 126 a squeezes the first resilient restoration part 132 a to trigger the first switch 130 a .
- the first resilient restoration part 132 a will rebound to drive the first keycap 126 a to move upward and return to its original position.
- the second keycap 126 b is located above the second switch 130 b and exposed from a second window 1222 b of the upper casing 1222 (which communicates with the accommodating space 122 a ).
- the second lift mechanism 128 b is connected to and between the second keycap 126 b and the bottom plate 124 .
- the second resilient restoration part 132 b is located between the second keycap 126 b and the second switch 130 b .
- the second keycap 126 b moves toward the second switch 130 b in the vertical direction Dv, the second keycap 126 b squeezes the second resilient restoration part 132 b to trigger the second switch 130 b .
- the second resilient restoration part 132 b will rebound to drive the second keycap 126 b to move upward and return to its original position.
- the projection of the first keycap portion 1422 of the multilayer structure 14 (in which the first keycap portion 1422 is the portion of the inner flexible layer 142 corresponding to the first keycap 126 a ) on the upper casing 1222 in the vertical direction Dv is within the first window 1222 a .
- the projection of the second keycap portion 1424 of the multilayer structure 14 (in which the second keycap portion 1424 is the portion of the inner flexible layer 142 corresponding to the second keycap 126 b ) on the upper casing 1222 in the vertical direction Dv is within the second window 1222 b.
- the switch circuit board 130 is achieved by a membrane circuit board which includes an upper circuit substrate, a lower circuit substrate, and an intermediate insulation sheet disposed between the upper circuit substrate and the lower circuit substrate.
- the switch is achieved by contacts oppositely disposed on the upper circuit substrate and the lower circuit substrate; for simplification of drawing, the switch is shown by a single block in the figures.
- the switch circuit board 130 may also be achieved by other structures, e.g., disposing a tactile switch on a printed circuit board or flexible circuit board.
- opposite contacts are formed on a circuit board as a switch.
- the resilient restoration part has a conductive portion, so that when the resilient restoration part is squeezed downward, the conductive portion can conduct the contacts.
- the switch may be triggered by other structures.
- the first switch 130 a is offset from the middle (so as not to be covered by the first resilient restoration part 132 a ).
- the first keycap 126 a has a downward protrusion corresponding to the first switch 130 a , so that when the first keycap 126 a moves downward, the protrusion can trigger the first switch 130 a .
- the protrusion in the above example may be disposed on the first lift mechanism 128 a (e.g., one of the supports of the scissors support) alternatively, so that when the first keycap 126 a moves downward, the first keycap 126 a drives the first lift mechanism 128 a to fold so as to make the protrusion trigger the first switch 130 a.
- the first lift mechanism 128 a e.g., one of the supports of the scissors support
- the multilayer structure 14 includes an inner flexible layer 142 , a flexible light-transmissive layer 144 stacked on the inner flexible layer 142 , and a first rigid light-transmissive cover sheet 146 and a second rigid light-transmissive cover sheet 148 which are stacked between the inner flexible layer 142 and the flexible light-transmissive layer 144 .
- the rigidity of the first rigid light-transmissive cover sheet 146 and the second rigid light-transmissive cover sheet 148 is greater than that of the inner flexible layer 142 .
- the inner flexible layer 142 has a first keycap portion 1422 , a second keycap portion 1424 , and a connection portion 1426 which directly connects the first keycap portion 1422 and the second keycap portion 1424 .
- the connection portion 1426 can be considered to extend outward from the first keycap portion 1422 (relative to the first keycap portion 1422 ) and can be considered to also extend outward from the second keycap portion 1424 (relative to the second keycap portion 1424 ).
- the connection portion 1426 surrounds the first keycap portion 1422 and the second keycap portion 1424 (as shown by FIG. 3 ).
- the first keycap portion 1422 covers the first keycap 126 a (i.e., located above the first switch 130 a ) and forms a first spatial character structure 1422 a ;
- the second keycap portion 1424 covers the second keycap 126 b (i.e., located above the second switch 130 b ) and forms a second spatial character structure 1424 a .
- the first spatial character structure 1422 a and the second spatial character structure 1424 a are represented by round holes for simplification of drawing.
- the first rigid light-transmissive cover sheet 146 is disposed above the first keycap portion 1422 and covers the first spatial character structure 1422 a .
- the second rigid light-transmissive cover sheet 148 is disposed on the second keycap portion 1424 and covers the second spatial character structure 1424 a .
- the flexible light-transmissive layer 144 covers the inner flexible layer 142 , the first rigid light-transmissive cover sheet 146 , and the second rigid light-transmissive cover sheet 148 .
- the user's finger actually touches the portion of the multilayer structure 14 (or the flexible light-transmissive layer 144 ) corresponding to the first keycap 126 a . Even during the pressing process, the finger may rub the multilayer structure 14 . Under the protection of the first rigid light-transmitting cover sheet 146 , the first spatial character structure 1422 a will not be affected by the rubbing of the finger, at least reducing structural damage to the first spatial character structure 1422 a (including structural deformation of the first spatial character structure 1422 a ) caused by rubbing of the finger.
- the second rigid light-transmissive cover sheet 148 also has the same protective effect on the second spatial character structure 1424 a , which will not be repeated.
- the first embodiment is based on that the first keycap 126 a and the second keycap 126 b have the first spatial character structure 1422 a and the second spatial character structure 1424 a respectively; however, it is not limited thereto in practice.
- the multilayer structure 14 may has a spatial character structure and a corresponding rigid light-transmissive cover sheet for each keycap, which will not described in addition.
- the first keycap 126 a has a horizontal keycap surface 1262 a .
- the first keycap portion 1422 is fixed on the horizontal keycap surface 1262 a .
- the projection of the first rigid light-transmissive cover sheet 146 on the first keycap 126 a in the vertical direction Dv is within the horizontal keycap surface 1262 a ; that is, the first rigid light-transmissive cover sheet 146 is smaller than the horizontal keycap surface 1262 a .
- the outer diameter of the first rigid light-transmissive cover sheet 146 can be designed to be smaller than the outer diameter of the horizontal keycap surface 1262 a by about 0.4 mm, that is, 0.2 mm on one side.
- the first rigid light-transmissive cover sheet 146 can effectively fall into the horizontal keycap surface 1262 a , avoiding the first rigid light-transmissive cover sheet 146 from protruding from the horizontal keycap surface 1262 a in a horizontal direction Dh (indicated by a double-headed arrow in the figures, which is perpendicular to the vertical direction Dv) to affect the user's pressing feeling.
- the first keycap 126 a also has a keycap fringe 1264 a which bends downward and extends from the horizontal keycap surface 1262 a .
- the multilayer structure 14 (or the inner flexible layer 142 thereof) and the keycap fringe 1264 a are separable, so that when the first keycap 126 a is pressed, the multilayer structure 14 can be smoothly and elastically deformed and will not cause excessive pulling on the first keycap 126 a and affect the up and down movement of the first keycap 126 a , as shown by FIG. 5 . Furthermore, in the first embodiment, when the first keycap 126 a is not pressed yet, there is a gap G1 between the first keycap portion 1422 and the keycap fringe 1264 a in the horizontal direction Dh.
- the multilayer structure 14 is located above the upper casing 1222 and fixed to an outer surface 1222 c of the upper casing 1222 .
- the lower flexible layer 16 is located under the lower casing 1224 .
- the periphery 14 a of the multilayer structure 14 and the periphery 16 a of the lower flexible layer 16 are joined (for example, but not limited to by glue) to encapsulate the device casing 122 .
- the multilayer structure 14 also includes a rigid frame sheet 150 .
- the inner flexible layer 142 is stacked on the rigid frame sheet 150 , for example, but not limited to by combining the both with an adhesive layer 151 a (only shown in FIG. 4 and FIG.
- the multilayer structure 14 is fixed to the upper casing 1222 through the rigid frame sheet 150 (for example, but not limited to by combining the both with an adhesive layer 151 b , only shown in FIG. 4 and FIG. 5 for simplification of drawing).
- the rigid frame sheet 150 has a first through hole 150 a and a second through hole 150 b .
- the connection portion 1426 is fixed on the rigid frame sheet 150 .
- the rigid frame sheet 150 has a greater rigidity than the inner flexible layer 142 and the flexible light-transmissive layer 144 , so the structural rigidity of the multilayer structure 14 is increased.
- the projection of the first keycap portion 1422 on the rigid frame sheet 150 in the vertical direction Dv is within the first through hole 150 a .
- the projection of the second keycap portion 1424 on the rigid frame sheet 150 in the vertical direction Dv is within the second through hole 150 b .
- the inner flexible layer 142 is made of an opaque material, for example but not limited to woven fabrics, thermoplastic polyurethanes (TPU), polyurethane (PU) and so on.
- the first spatial character structure 1422 a is a holed structure.
- the first keycap 126 a is light-transmissive; for example, the entire first keycap 126 a may be made of a light-transmissive material, or only the portion of the first keycap 126 a corresponding to the holed structure is light-transmissive.
- the keyboard body 12 includes a light source 134 a (or referred to as a first light source 134 a ), disposed under the first keycap 126 a corresponding to the first spatial character structure 1422 a .
- Light emitted by the light source 134 a can travel upward to pass through the first keycap 126 a , the first spatial character structure 1422 a , the first rigid light-transmissive cover sheet 146 , and the flexible light-transmissive layer 144 to be emitted from the multilayer structure 14 , which can provide the user with a visual effect.
- the second spatial character structure 1424 a may also be a holed structure.
- the second keycap 126 b may light-transmissive.
- the keyboard body 12 includes another light source 134 b (or referred to as a second light source 134 b ), disposed under the second keycap 126 b corresponding to the second spatial character structure 1424 a .
- Light emitted by the light source 134 b can travel upward to pass through the second keycap 126 b , the second spatial character structure 1424 a , the second rigid light-transmissive cover sheet 148 , and the flexible light-transmissive layer 144 to be emitted from the multilayer structure 14 , which can provide the user with visual effects.
- the first and second light sources 134 a and 134 b (for example but not limited to light-emitting diodes) are disposed on a printed circuit board or flexible circuit board under the bottom plate 124 .
- the bottom plate 124 forms holes corresponding to the light sources 134 a and 134 b .
- the light sources 134 a and 134 b may also be integrated onto the switch circuit board 130 .
- the first and second resilient restoration parts 132 a and 132 b covers the first and second light sources 134 a and 134 b
- the first and second resilient restoration parts 132 a and 132 b may be made of a light-transmissive material, for example but not limited to light-transmissive rubber domes.
- the profile of the first spatial character structure 1422 a may be text, symbols, numbers, graphics, etc.
- the second spatial character structure 1424 a may also be the same, which will not be repeated.
- the first spatial character structure 1422 a is not limited to provide the user with a visual effect through light transmission.
- the first spatial character structure 1422 a is achieved by a recess in which a light reflective material is disposed.
- the first keycap 126 a does not need to be light transmissive; therein, the recess may be formed by the first keycap portion 1422 alone (e.g.
- the inner flexible layer 142 is opaque and therefore can be used as a light-blocking layer which blocks light (from the light sources 134 a and 134 b ) escaping from the periphery of the first keycap 126 a and the second keycap 126 b.
- the first keycap portion 1422 is fixed on the horizontal keycap surface 1262 a by means of glue (for example but not limited to an adhesive layer 143 ).
- the connection portion 1426 is also fixed on the rigid frame sheet 150 by means of glue (i.e., by the adhesive layer 151 a ).
- the first rigid light-transmissive cover sheet 146 is also fixed on the first keycap portion 1422 by means of glue (for example but not limited to an adhesive layer 147 ).
- glue for example but not limited to an adhesive layer 143
- 151 a and 151 b are shown only in FIG. 4 and FIG. 5 for simplification of drawing; however, it is not limited thereto.
- first rigid light-transmissive cover sheet 146 (and the second rigid light-transmissive cover sheet 148 ) can be effectively fixed through the combination of the flexible light-transmissive layer 144 and the inner flexible layer 142 .
- the flexible light-transmissive layer 144 may be but not limited to light-transmissive silicone.
- the first rigid light-transmissive cover sheet 146 , the second rigid light-transmissive cover sheet 148 , and the rigid frame sheet 150 may be but not limited to polyethylene terephthalate (PET), polycarbonate (PC), FR4 epoxy glass fibers, etc.
- PET polyethylene terephthalate
- PC polycarbonate
- FR4 epoxy glass fibers etc.
- the adhesive layers 143 and 147 also use appropriate materials as needed (for example, light transmission is required).
- the keyboard 1 includes a plurality of keycaps, and thus the structure of the keyboard 1 is multiple keyswitch structures.
- one keycap and the corresponding structure can be regarded as a single-key keyswitch structure, e.g. the single-key keyswitch structures 10 a and 10 b indicated by dashed frames in FIG. 4 .
- the combination of the both can be regarded as a double-key keyswitch structure.
- the above single-key keyswitch structures 10 a and 10 b or the double-key keyswitch structure can also be applied to other applications, e.g. button switches, keys or buttons on the device control panel, etc.
- the structural frame is used directly as the upper casing 1222 .
- the structural frame is contained in the device casing 122 and becomes apart of the device housing 122 .
- the structural frame may not be contained in the device casing 122 , and is not a part of the device housing 122 ; that is, the portions of the upper casing 1222 inside the dashed frames in FIG. 4 are not regarded as a part of the device casing 122 .
- the multilayer structure 14 is fixed to the structural frame.
- the structural frame has a first window and a second window.
- the projection of the first keycap portion 1422 on the structural frame in the vertical direction Dv is within the first window.
- the projection of the second keycap portion 1424 on the structural frame in the vertical direction Dv is within the second window.
- the multilayer structure 14 covers the upper casing 1222 ; however, it is not limited thereto in practice.
- a keyboard 3 according to a second embodiment is structurally similar to the keyboard 1 , so the keyboard 3 uses the reference numbers of the keyboard 1 in practice.
- the multilayer structure 34 covers the plurality of keycap and is fixed on an inner surface 1222 d of the upper casing 1222 ; that is, the multilayer structure 34 is disposed in the device casing 122 and the portions thereof corresponding to the keycaps are exposed or protrudes from the upper casing 1222 .
- the first keycap portion 1422 protrudes from the first window 1222 a
- the second keycap portion 1424 protrudes from the second window 1222 b
- the connection portion 1426 is located under the upper casing 1222 .
- the multilayer structure 34 adheres to the inner surface 1222 d through the adhesive layer 145 of the flexible light-transmissive layer 144 ; however, it is not limited thereto.
- the portion of the multilayer structure 34 located in the accommodating space 122 a may be clamped by the upper casing 1222 and the lower casing 1224 (e.g.
- the rigid frame sheet 150 is disposed on the flexible light-transmissive layer 144 alternatively.
- the modified multilayer structure 34 may be fixed to inner surface 1222 d through the rigid frame sheet 150 (similarly, which may be achieved by means of glue).
- the keycap e.g. the first keycap 126 a
- a lift mechanism e.g. the first lift mechanism 128 a
- a resilient restoration part e.g. the first resilient restoration part 132 a
- the first keycap 126 a is supported only by the first resilient restoration part 132 a .
- the multilayer structure 14 itself can maintain the shape of the keycap (for example, the first rigid light-transmissive cover sheet 146 can increase the structural rigidity), the can be further omitted so that the first resilient restoration part 132 a directly abuts the first keycap portion 1422 , as shown by FIG. 8 .
- the first resilient restoration part 132 a can be further omitted, as shown by FIG. 9 .
- the multilayer structure 14 ′ is a variant of the multilayer structure 14 of the above keyboard 1 .
- the multilayer structure 14 ′ further includes a protrusion 152 which protrudes toward the first switch 130 a .
- the protrusion 152 moves downward to trigger the first switch 130 a .
- the protrusion 152 may be fixed to the inner flexible layer 142 by means of glue, or the protrusion 152 is structurally integrated into the inner flexible layer 142 .
- the inner flexible layer 142 is shaped by hot-pressing to form the protrusion 152 .
- the multilayer structure 14 may be formed by, but not limited to, laminating sheet materials and shaping in practice.
- a transfer film 1400 is prepared.
- the transfer film 1400 carries a light-transmissive film 1402 used for forming the first rigid light-transmissive cover sheet 146 and the second rigid light-transmissive cover sheet 148 .
- an adhesive layer 1404 used for forming the adhesive layer 147 is formed on the light-transmissive film 1402 (e.g. by hot melt glue, double-sided glue, or other glues).
- the light-transmissive film 1402 (and the adhesive layer 1404 thereon) is processed to form the first rigid light-transmissive cover sheet 146 and the second rigid light-transmissive cover sheet 148 (in which the adhesive layer 1404 after processed forms the adhesive layer 147 ), e.g. by removing unnecessary portions (indicated by dashed frames in the figure) through laser.
- a film 1406 used for forming the rigid frame sheet 150 is prepared.
- An adhesive layer 1408 e.g. by hot melt glue, double-sided glue, or other glues used for forming the adhesive layer 151 a is formed on the film 1406 .
- a film 1410 used for forming the inner flexible layer 142 adheres to the adhesive layer 1408 .
- the film 1406 (together with the adhesive layer 1408 ) may be processed first to form the rigid frame sheet 150 (e.g. by punching to remove unnecessary portions which are indicated by dashed frames in the figure). Then, a film 1410 adheres to the adhesive layer 1408 .
- the combination is processed to form the rigid frame sheet 150 (e.g. by using laser to remove unnecessary portions which are indicated by dashed frames in the figure).
- FIG. 12 in which the cross section is not hatched for simplification of drawing
- the transfer film 1400 is removed.
- a layer of glue 1412 is coated on the combination of the layered structures (i.e. the first rigid light-transmissive cover sheet 146 and the second rigid light-transmissive cover sheet 148 thereof).
- FIG. 13 the structure in FIG. 12 is placed in a shaping mold 4 and then is compressed and heated (e.g. 120 degrees Celsius for 120 seconds) through the shaping mold 4 to form the flexible light-transmissive layer 144 .
- the shaped layered structure has carried out most of the multilayer structure 14 .
- the first keycap portion 1422 and the second keycap portion 1424 (formed by the film 1410 ) in the shaped layered structure is processed by laser engraving (on the portions indicated by dashed frames in FIG. 13 ) to form the first spatial character structure 1422 a and the second spatial character structure 1424 a .
- the glue 1412 may be formed on the bonded layered structures in FIG. 12 by injection, e.g. through the shaping mold 4 that is made into an injection mold.
- the multilayer structure 14 is fixed on the outer surface 1222 c of the upper casing 1222 , so the adhesive layer 151 b is formed on the rigid frame sheet 150 of the multilayer structure 14 that is shaped through the shaping mold 4 , so as to adhere to the outer surface 1222 c .
- the adhesive layer 151 b is formed on the outer surface 1222 c alternatively, for the rigid frame sheet 150 to adhere thereto.
- the adhesive layer 143 is formed on the surface, toward the keycap, of the inner flexible layer 142 of the multilayer structure 14 that is shaped through the shaping mold 4 , so as to adhere to the first keycap 126 a and the second keycap 126 b .
- the adhesive layer 143 is formed on the first keycap 126 a and the second keycap 126 b alternatively, for the inner flexible layer 142 to adhere thereto. Furthermore, the above multilayer structures 14 ′ and 34 can also be made in a similar manner, which will not be described in addition.
- the user's finger actually touches the portion of the multilayer structure (or the flexible light-transmissive layer) corresponding to the keycap. Even during the pressing process, the finger may rub the multilayer structure. Under the protection of the rigid light-transmitting cover sheet, the spatial character structure will not be affected by the rubbing of the finger, at least greatly reducing structural damage to the spatial character structure (including structural deformation of the first spatial character structure) caused by rubbing of the finger.
Abstract
Description
- The present invention relates to a keyswitch structure and a keyboard, and more particularly to a keyswitch structure with protective outer layer and a keyboard with the keyswitch structure.
- Common keyboards have a plurality of keycaps for users to press for input. The keycap usually has some characters (including text, symbols, and so on) thereon, for users to recognize and press the keycap quickly and correctly. The Characters can be formed by printing, engraving, hollowed-out layered structures, etc., and have a spatial structure. When a finger touches and presses the keycap, the finger may rub the characters. After long-term rubbing, the characters may be damaged or even disappear. Some keyboards have a protective outer layer that covers all keycaps. However, when the finger touches and presses the protective outer layer corresponding to the keycap to be pressed, the portion of the protective outer layer may still rub the characters on the keycap. Similarly, after long-term rubbing, the characters will still be damaged or even disappear.
- An objective of the invention is to provide a keyswitch structure, which uses a rigid light-transmissive cover sheet to cover a character structure to protect the character structure.
- A keyswitch structure according to the invention includes a switch and a multilayer structure disposed above the switch. The multilayer structure includes an inner flexible layer, a rigid light-transmissive cover sheet, and a flexible light-transmissive layer. The inner flexible layer has a keycap portion and a connection portion extending outward from the keycap portion. The keycap portion is located above the switch and forms a spatial character structure. The rigid light-transmissive cover sheet is disposed on the keycap portion and covers the spatial character structure. The flexible light-transmissive layer covers the inner flexible layer and the rigid light-transmissive cover sheet. Thereby, the rigid light-transmissive cover sheet can protect spatial character structure from structural damage caused by rubbing when the flexible light-transmissive layer is pressed by a finger of a user.
- An objective of the invention is to provide a keyboard, which includes the above keyswitch structure and therefore can use the rigid light-transmissive cover sheet to protect the character structure.
- A keyboard according to the invention includes a keyswitch structure and a device casing carrying the keyswitch structure. The keyswitch structure includes a switch and a multilayer structure disposed above the switch. The multilayer structure is fixed to the device casing and includes an inner flexible layer, a rigid light-transmissive cover sheet, and a flexible light-transmissive layer. The inner flexible layer has a keycap portion and a connection portion extending outward from the keycap portion. The keycap portion is located above the switch and forms a spatial character structure. The rigid light-transmissive cover sheet is disposed on the keycap portion and covers the spatial character structure. The flexible light-transmissive layer covers the inner flexible layer and the rigid light-transmissive cover sheet. Similarly, the rigid light-transmissive cover sheet can protect spatial character structure from structural damage caused by rubbing when the flexible light-transmissive layer is pressed by a finger of a user.
- These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
-
FIG. 1 is schematic diagram illustrating a keyboard according to a first embodiment. -
FIG. 2 is a partially-exploded view of the keyboard inFIG. 1 . -
FIG. 3 is an exploded view of a multilayer structure inFIG. 2 . -
FIG. 4 is a sectional view of the keyboard inFIG. 1 along the line X-X. -
FIG. 5 is a sectional view of the keyboard inFIG. 4 when a first keycap thereof is pressed. -
FIG. 6 is schematic diagram illustrating a keyboard according to a second embodiment. -
FIG. 7 is a sectional view of the keyboard inFIG. 6 along the line Y-Y. -
FIG. 8 is a sectional view of a variant of the keyboard inFIG. 4 . -
FIG. 9 is a sectional view of a variant of the keyboard inFIG. 4 . -
FIG. 10 is a sectional diagram illustrating a layered structure for forming the multilayer structure inFIG. 2 . -
FIG. 11 is a sectional diagram illustrating another layered structure for forming the multilayer structure inFIG. 2 . -
FIG. 12 is a sectional diagram illustrating the combination of the layered structures inFIG. 10 andFIG. 11 . -
FIG. 13 is a sectional diagram illustrating the combination of the layered structures inFIG. 12 when being shaped. - Please refer to
FIG. 1 toFIG. 4 . Akeyboard 1 according to a first embodiment includes akeyboard body 12, amultilayer structure 14, and a lowerflexible layer 16. Themultilayer structure 14 and the lowerflexible layer 16 are disposed on the upper and lower sides of thekeyboard body 12 respectively and are joined to completely encapsulate thekeyboard body 12 to produce waterproof and dustproof effects. Themultilayer structure 14 is flexible, so that users can implement input operations on thekeyboard body 12 by pressing themultilayer structure 14. - The
keyboard body 12 includes adevice casing 122, and abottom plate 124, a plurality of keycaps (including afirst keycap 126 a and asecond keycap 126 b), a plurality of lift mechanisms (including afirst lift mechanism 128 a and asecond lift mechanism 128 b), aswitch circuit board 130, and a plurality of resilient restoration parts (including a firstresilient restoration part 132 a and a secondresilient restoration part 132 b) which are carried by thedevice casing 122. Thedevice casing 122 includes anupper casing 1222 and alower casing 1224. Theupper casing 1222 and thelower casing 1224 are connected to form anaccommodating space 122 a. Thebottom plate 124 is placed on thelower casing 1224 in theaccommodating space 122 a. The plurality of keycaps are disposed above thebottom plate 124 and exposed from theupper casing 1222. The plurality of lift mechanisms are connected to and between the keycaps and thebottom plate 124, so that the plurality of keycaps can move up and down relative to thebottom plate 124 in a vertical direction Dv (indicated by a double-headed arrow). Each keycap corresponds to one lift mechanism, e.g., scissors supports, butterfly supports, or other mechanisms capable of moving the corresponding keycap up and down. In practice, the lift mechanism of the longer keycaps (such as the space bar, the enter key, the backspace key, the shift key) can be achieved by a plurality of scissors supports, butterfly supports, or a combination thereof. Theswitch circuit board 130 is placed on thebottom plate 124 in theaccommodating space 122 a and has a plurality of switches (including afirst switch 130 a and asecond switch 130 b). Each switch corresponds to one keycap. In practice, the longer keycap can correspond to multiple switches. The plurality of resilient restoration parts are disposed between the plurality of keycaps and thebottom plate 124 in theaccommodating space 122 a. Each resilient restoration part corresponds to one keycap. In practice, the longer keycap can correspond to multiple resilient restoration parts. The resilient restoration part can be squeezed (e.g. by the corresponding downwardly moving keycap) to elastically deform. The resilience of the squeezed resilient restoration part can drive the corresponding keycap to move upward and return to its original position. - Therein, the
upper casing 1222 is a structural frame. Thefirst keycap 126 a is located above thefirst switch 130 a and exposed from afirst window 1222 a of the upper casing 1222 (which communicates with theaccommodating space 122 a). Thefirst lift mechanism 128 a is connected to and between thefirst keycap 126 a and thebottom plate 124. The firstresilient restoration part 132 a is located between thefirst keycap 126 a and thefirst switch 130 a. When thefirst keycap 126 a moves toward thefirst switch 130 a in the vertical direction Dv (e.g., by a user pressing thefirst keycap 126 a through the multilayer structure 14), thefirst keycap 126 a squeezes the firstresilient restoration part 132 a to trigger thefirst switch 130 a. When thefirst keycap 126 a is no longer pressed, the firstresilient restoration part 132 a will rebound to drive thefirst keycap 126 a to move upward and return to its original position. Similarly, thesecond keycap 126 b is located above thesecond switch 130 b and exposed from asecond window 1222 b of the upper casing 1222 (which communicates with theaccommodating space 122 a). Thesecond lift mechanism 128 b is connected to and between thesecond keycap 126 b and thebottom plate 124. The secondresilient restoration part 132 b is located between thesecond keycap 126 b and thesecond switch 130 b. When thesecond keycap 126 b moves toward thesecond switch 130 b in the vertical direction Dv, thesecond keycap 126 b squeezes the secondresilient restoration part 132 b to trigger thesecond switch 130 b. When thesecond keycap 126 b is no longer pressed, the secondresilient restoration part 132 b will rebound to drive thesecond keycap 126 b to move upward and return to its original position. Furthermore, in the first embodiment, the projection of thefirst keycap portion 1422 of the multilayer structure 14 (in which thefirst keycap portion 1422 is the portion of the innerflexible layer 142 corresponding to thefirst keycap 126 a) on theupper casing 1222 in the vertical direction Dv is within thefirst window 1222 a. The projection of thesecond keycap portion 1424 of the multilayer structure 14 (in which thesecond keycap portion 1424 is the portion of the innerflexible layer 142 corresponding to thesecond keycap 126 b) on theupper casing 1222 in the vertical direction Dv is within thesecond window 1222 b. - Furthermore, in the first embodiment, the
switch circuit board 130 is achieved by a membrane circuit board which includes an upper circuit substrate, a lower circuit substrate, and an intermediate insulation sheet disposed between the upper circuit substrate and the lower circuit substrate. The switch is achieved by contacts oppositely disposed on the upper circuit substrate and the lower circuit substrate; for simplification of drawing, the switch is shown by a single block in the figures. In practice, theswitch circuit board 130 may also be achieved by other structures, e.g., disposing a tactile switch on a printed circuit board or flexible circuit board. For another example, opposite contacts are formed on a circuit board as a switch. The resilient restoration part has a conductive portion, so that when the resilient restoration part is squeezed downward, the conductive portion can conduct the contacts. In addition, in practice, the switch may be triggered by other structures. For example, in the view point ofFIG. 4 , thefirst switch 130 a is offset from the middle (so as not to be covered by the firstresilient restoration part 132 a). Thefirst keycap 126 a has a downward protrusion corresponding to thefirst switch 130 a, so that when thefirst keycap 126 a moves downward, the protrusion can trigger thefirst switch 130 a. For another example, the protrusion in the above example may be disposed on thefirst lift mechanism 128 a (e.g., one of the supports of the scissors support) alternatively, so that when thefirst keycap 126 a moves downward, thefirst keycap 126 a drives thefirst lift mechanism 128 a to fold so as to make the protrusion trigger thefirst switch 130 a. - As shown by
FIG. 3 andFIG. 4 , themultilayer structure 14 includes an innerflexible layer 142, a flexible light-transmissive layer 144 stacked on the innerflexible layer 142, and a first rigid light-transmissive cover sheet 146 and a second rigid light-transmissive cover sheet 148 which are stacked between the innerflexible layer 142 and the flexible light-transmissive layer 144. The rigidity of the first rigid light-transmissive cover sheet 146 and the second rigid light-transmissive cover sheet 148 is greater than that of the innerflexible layer 142. The innerflexible layer 142 has afirst keycap portion 1422, asecond keycap portion 1424, and aconnection portion 1426 which directly connects thefirst keycap portion 1422 and thesecond keycap portion 1424. In structural logic, theconnection portion 1426 can be considered to extend outward from the first keycap portion 1422 (relative to the first keycap portion 1422) and can be considered to also extend outward from the second keycap portion 1424 (relative to the second keycap portion 1424). Furthermore, in the first embodiment, theconnection portion 1426 surrounds thefirst keycap portion 1422 and the second keycap portion 1424 (as shown byFIG. 3 ). Thefirst keycap portion 1422 covers thefirst keycap 126 a (i.e., located above thefirst switch 130 a) and forms a firstspatial character structure 1422 a; thesecond keycap portion 1424 covers thesecond keycap 126 b (i.e., located above thesecond switch 130 b) and forms a secondspatial character structure 1424 a. Therein, the firstspatial character structure 1422 a and the secondspatial character structure 1424 a are represented by round holes for simplification of drawing. The first rigid light-transmissive cover sheet 146 is disposed above thefirst keycap portion 1422 and covers the firstspatial character structure 1422 a. The second rigid light-transmissive cover sheet 148 is disposed on thesecond keycap portion 1424 and covers the secondspatial character structure 1424 a. The flexible light-transmissive layer 144 covers the innerflexible layer 142, the first rigid light-transmissive cover sheet 146, and the second rigid light-transmissive cover sheet 148. - Thereby, when the user presses the
first keycap 126 a, the user's finger actually touches the portion of the multilayer structure 14 (or the flexible light-transmissive layer 144) corresponding to thefirst keycap 126 a. Even during the pressing process, the finger may rub themultilayer structure 14. Under the protection of the first rigid light-transmittingcover sheet 146, the firstspatial character structure 1422 a will not be affected by the rubbing of the finger, at least reducing structural damage to the firstspatial character structure 1422 a (including structural deformation of the firstspatial character structure 1422 a) caused by rubbing of the finger. Similarly, the second rigid light-transmissive cover sheet 148 also has the same protective effect on the secondspatial character structure 1424 a, which will not be repeated. In addition, for simplification of drawing and description, the first embodiment is based on that thefirst keycap 126 a and thesecond keycap 126 b have the firstspatial character structure 1422 a and the secondspatial character structure 1424 a respectively; however, it is not limited thereto in practice. For example, themultilayer structure 14 may has a spatial character structure and a corresponding rigid light-transmissive cover sheet for each keycap, which will not described in addition. - Furthermore, as shown by
FIG. 2 toFIG. 5 , in the first embodiment, thefirst keycap 126 a has ahorizontal keycap surface 1262 a. Thefirst keycap portion 1422 is fixed on thehorizontal keycap surface 1262 a. The projection of the first rigid light-transmissive cover sheet 146 on thefirst keycap 126 a in the vertical direction Dv is within thehorizontal keycap surface 1262 a; that is, the first rigid light-transmissive cover sheet 146 is smaller than thehorizontal keycap surface 1262 a. In practice, the outer diameter of the first rigid light-transmissive cover sheet 146 can be designed to be smaller than the outer diameter of thehorizontal keycap surface 1262 a by about 0.4 mm, that is, 0.2 mm on one side. It can meet most of the assembly tolerance requirements, so that after themultilayer structure 14 is assembled to thekeyboard body 12, the first rigid light-transmissive cover sheet 146 can effectively fall into thehorizontal keycap surface 1262 a, avoiding the first rigid light-transmissive cover sheet 146 from protruding from thehorizontal keycap surface 1262 a in a horizontal direction Dh (indicated by a double-headed arrow in the figures, which is perpendicular to the vertical direction Dv) to affect the user's pressing feeling. Thefirst keycap 126 a also has akeycap fringe 1264 a which bends downward and extends from thehorizontal keycap surface 1262 a. The multilayer structure 14 (or the innerflexible layer 142 thereof) and thekeycap fringe 1264 a are separable, so that when thefirst keycap 126 a is pressed, themultilayer structure 14 can be smoothly and elastically deformed and will not cause excessive pulling on thefirst keycap 126 a and affect the up and down movement of thefirst keycap 126 a, as shown byFIG. 5 . Furthermore, in the first embodiment, when thefirst keycap 126 a is not pressed yet, there is a gap G1 between thefirst keycap portion 1422 and thekeycap fringe 1264 a in the horizontal direction Dh. - Furthermore, as shown by
FIG. 2 toFIG. 4 , themultilayer structure 14 is located above theupper casing 1222 and fixed to anouter surface 1222 c of theupper casing 1222. The lowerflexible layer 16 is located under thelower casing 1224. Theperiphery 14 a of themultilayer structure 14 and theperiphery 16 a of the lowerflexible layer 16 are joined (for example, but not limited to by glue) to encapsulate thedevice casing 122. Moreover, in the first embodiment, themultilayer structure 14 also includes arigid frame sheet 150. The innerflexible layer 142 is stacked on therigid frame sheet 150, for example, but not limited to by combining the both with anadhesive layer 151 a (only shown inFIG. 4 andFIG. 5 for simplification of drawing). Themultilayer structure 14 is fixed to theupper casing 1222 through the rigid frame sheet 150 (for example, but not limited to by combining the both with anadhesive layer 151 b, only shown inFIG. 4 andFIG. 5 for simplification of drawing). Therein, therigid frame sheet 150 has a first throughhole 150 a and a second throughhole 150 b. Theconnection portion 1426 is fixed on therigid frame sheet 150. Therigid frame sheet 150 has a greater rigidity than the innerflexible layer 142 and the flexible light-transmissive layer 144, so the structural rigidity of themultilayer structure 14 is increased. The projection of thefirst keycap portion 1422 on therigid frame sheet 150 in the vertical direction Dv is within the first throughhole 150 a. The projection of thesecond keycap portion 1424 on therigid frame sheet 150 in the vertical direction Dv is within the second throughhole 150 b. Thereby, when thefirst keycap 126 a is pressed, themultilayer structure 14 can be smoothly and elastically deformed; the same is true for thesecond keycap 126 b, which will not be described in addition. - Furthermore, in the first embodiment, the inner
flexible layer 142 is made of an opaque material, for example but not limited to woven fabrics, thermoplastic polyurethanes (TPU), polyurethane (PU) and so on. The firstspatial character structure 1422 a is a holed structure. Thefirst keycap 126 a is light-transmissive; for example, the entirefirst keycap 126 a may be made of a light-transmissive material, or only the portion of thefirst keycap 126 a corresponding to the holed structure is light-transmissive. Thekeyboard body 12 includes alight source 134 a (or referred to as a firstlight source 134 a), disposed under thefirst keycap 126 a corresponding to the firstspatial character structure 1422 a. Light emitted by thelight source 134 a can travel upward to pass through thefirst keycap 126 a, the firstspatial character structure 1422 a, the first rigid light-transmissive cover sheet 146, and the flexible light-transmissive layer 144 to be emitted from themultilayer structure 14, which can provide the user with a visual effect. Similarly, the secondspatial character structure 1424 a may also be a holed structure. Thesecond keycap 126 b may light-transmissive. Thekeyboard body 12 includes anotherlight source 134 b (or referred to as a secondlight source 134 b), disposed under thesecond keycap 126 b corresponding to the secondspatial character structure 1424 a. Light emitted by thelight source 134 b can travel upward to pass through thesecond keycap 126 b, the secondspatial character structure 1424 a, the second rigid light-transmissive cover sheet 148, and the flexible light-transmissive layer 144 to be emitted from themultilayer structure 14, which can provide the user with visual effects. The first and secondlight sources bottom plate 124. Therein, in order to enable the light emitted by the first and secondlight sources bottom plate 124 forms holes corresponding to thelight sources light sources switch circuit board 130. In addition, if the first and secondresilient restoration parts light sources resilient restoration parts - Furthermore, in practice, the profile of the first
spatial character structure 1422 a may be text, symbols, numbers, graphics, etc. The secondspatial character structure 1424 a may also be the same, which will not be repeated. In addition, in practice, the firstspatial character structure 1422 a is not limited to provide the user with a visual effect through light transmission. For example, the firstspatial character structure 1422 a is achieved by a recess in which a light reflective material is disposed. For this instance, thefirst keycap 126 a does not need to be light transmissive; therein, the recess may be formed by thefirst keycap portion 1422 alone (e.g. by embossing the first keycap portion 1422), or may be formed jointly by thefirst keycap 126 a (or thehorizontal keycap surface 1262 a thereof) and the opening formed by thefirst keycap portion 1422. In addition, the innerflexible layer 142 is opaque and therefore can be used as a light-blocking layer which blocks light (from thelight sources first keycap 126 a and thesecond keycap 126 b. - In the first embodiment, the
first keycap portion 1422 is fixed on thehorizontal keycap surface 1262 a by means of glue (for example but not limited to an adhesive layer 143). Theconnection portion 1426 is also fixed on therigid frame sheet 150 by means of glue (i.e., by theadhesive layer 151 a). The first rigid light-transmissive cover sheet 146 is also fixed on thefirst keycap portion 1422 by means of glue (for example but not limited to an adhesive layer 147). Therein, the aboveadhesive layers FIG. 4 andFIG. 5 for simplification of drawing; however, it is not limited thereto. For example, the first rigid light-transmissive cover sheet 146 (and the second rigid light-transmissive cover sheet 148) can be effectively fixed through the combination of the flexible light-transmissive layer 144 and the innerflexible layer 142. The flexible light-transmissive layer 144 may be but not limited to light-transmissive silicone. The first rigid light-transmissive cover sheet 146, the second rigid light-transmissive cover sheet 148, and therigid frame sheet 150 may be but not limited to polyethylene terephthalate (PET), polycarbonate (PC), FR4 epoxy glass fibers, etc. Theadhesive layers - In addition, in the first embodiment, the
keyboard 1 includes a plurality of keycaps, and thus the structure of thekeyboard 1 is multiple keyswitch structures. In logic, one keycap and the corresponding structure can be regarded as a single-key keyswitch structure, e.g. the single-key keyswitch structures FIG. 4 . The combination of the both can be regarded as a double-key keyswitch structure. In practice, the above single-key keyswitch structures keyboard 1 in the specification also applies herein, and will not be repeated in addition. It is noticed that in thekeyboard 1, the structural frame is used directly as theupper casing 1222. The structural frame is contained in thedevice casing 122 and becomes apart of thedevice housing 122. However, it is not limited thereto. In practice, the structural frame may not be contained in thedevice casing 122, and is not a part of thedevice housing 122; that is, the portions of theupper casing 1222 inside the dashed frames inFIG. 4 are not regarded as a part of thedevice casing 122. Correspondingly, themultilayer structure 14 is fixed to the structural frame. The structural frame has a first window and a second window. The projection of thefirst keycap portion 1422 on the structural frame in the vertical direction Dv is within the first window. The projection of thesecond keycap portion 1424 on the structural frame in the vertical direction Dv is within the second window. - Furthermore, in the first embodiment, the
multilayer structure 14 covers theupper casing 1222; however, it is not limited thereto in practice. For example, as shown byFIG. 6 andFIG. 7 , akeyboard 3 according to a second embodiment is structurally similar to thekeyboard 1, so thekeyboard 3 uses the reference numbers of thekeyboard 1 in practice. In thekeyboard 3, themultilayer structure 34 covers the plurality of keycap and is fixed on aninner surface 1222 d of theupper casing 1222; that is, themultilayer structure 34 is disposed in thedevice casing 122 and the portions thereof corresponding to the keycaps are exposed or protrudes from theupper casing 1222. For example, thefirst keycap portion 1422 protrudes from thefirst window 1222 a, thesecond keycap portion 1424 protrudes from thesecond window 1222 b, and theconnection portion 1426 is located under theupper casing 1222. Therein, themultilayer structure 34 adheres to theinner surface 1222 d through theadhesive layer 145 of the flexible light-transmissive layer 144; however, it is not limited thereto. For example, the portion of themultilayer structure 34 located in theaccommodating space 122 a may be clamped by theupper casing 1222 and the lower casing 1224 (e.g. by using a upwardly-protruding structure disposed on thelower casing 1224 to abut against the multilayer structure 34), which also can achieve the effect of fixing themultilayer structure 34 and thedevice casing 122. For another example, in themultilayer structure 34, therigid frame sheet 150 is disposed on the flexible light-transmissive layer 144 alternatively. The modifiedmultilayer structure 34 may be fixed toinner surface 1222 d through the rigid frame sheet 150 (similarly, which may be achieved by means of glue). - Furthermore, in the first embodiment, the keycap (e.g. the
first keycap 126 a) is supported by a lift mechanism (e.g. thefirst lift mechanism 128 a) and a resilient restoration part (e.g. the firstresilient restoration part 132 a); however, it is not limited thereto in practice. For example, thefirst keycap 126 a is supported only by the firstresilient restoration part 132 a. For another example, if themultilayer structure 14 itself can maintain the shape of the keycap (for example, the first rigid light-transmissive cover sheet 146 can increase the structural rigidity), the can be further omitted so that the firstresilient restoration part 132 a directly abuts thefirst keycap portion 1422, as shown byFIG. 8 . For another example, if themultilayer structure 14 can provide sufficient structural flexibility, the firstresilient restoration part 132 a can be further omitted, as shown byFIG. 9 . In this instance, themultilayer structure 14′ is a variant of themultilayer structure 14 of theabove keyboard 1. Compared with themultilayer structure 14, themultilayer structure 14′ further includes aprotrusion 152 which protrudes toward thefirst switch 130 a. When the portion of themultilayer structure 14′ corresponding to thefirst keycap portion 1422 is pressed, theprotrusion 152 moves downward to trigger thefirst switch 130 a. In practice, theprotrusion 152 may be fixed to the innerflexible layer 142 by means of glue, or theprotrusion 152 is structurally integrated into the innerflexible layer 142. For example, the innerflexible layer 142 is shaped by hot-pressing to form theprotrusion 152. - In addition, in the
keyboard 1, themultilayer structure 14 may be formed by, but not limited to, laminating sheet materials and shaping in practice. For example, as shown byFIG. 10 (in which the cross section is not hatched for simplification of drawing), atransfer film 1400 is prepared. Thetransfer film 1400 carries a light-transmissive film 1402 used for forming the first rigid light-transmissive cover sheet 146 and the second rigid light-transmissive cover sheet 148. Then, anadhesive layer 1404 used for forming theadhesive layer 147 is formed on the light-transmissive film 1402 (e.g. by hot melt glue, double-sided glue, or other glues). The light-transmissive film 1402 (and theadhesive layer 1404 thereon) is processed to form the first rigid light-transmissive cover sheet 146 and the second rigid light-transmissive cover sheet 148 (in which theadhesive layer 1404 after processed forms the adhesive layer 147), e.g. by removing unnecessary portions (indicated by dashed frames in the figure) through laser. - As shown by
FIG. 11 (in which the cross section is not hatched for simplification of drawing), afilm 1406 used for forming therigid frame sheet 150 is prepared. An adhesive layer 1408 (e.g. by hot melt glue, double-sided glue, or other glues) used for forming theadhesive layer 151 a is formed on thefilm 1406. Afilm 1410 used for forming the innerflexible layer 142 adheres to theadhesive layer 1408. Therein, the film 1406 (together with the adhesive layer 1408) may be processed first to form the rigid frame sheet 150 (e.g. by punching to remove unnecessary portions which are indicated by dashed frames in the figure). Then, afilm 1410 adheres to theadhesive layer 1408. Alternatively, after thefilm 1410 adheres to theadhesive layer 1408, the combination is processed to form the rigid frame sheet 150 (e.g. by using laser to remove unnecessary portions which are indicated by dashed frames in the figure). - As shown by
FIG. 12 (in which the cross section is not hatched for simplification of drawing), after the layered structures inFIG. 10 andFIG. 11 are joined through theadhesive layer 1404, thetransfer film 1400 is removed. Then, a layer ofglue 1412 is coated on the combination of the layered structures (i.e. the first rigid light-transmissive cover sheet 146 and the second rigid light-transmissive cover sheet 148 thereof). As shown byFIG. 13 , the structure inFIG. 12 is placed in a shapingmold 4 and then is compressed and heated (e.g. 120 degrees Celsius for 120 seconds) through the shapingmold 4 to form the flexible light-transmissive layer 144. At this moment, the shaped layered structure has carried out most of themultilayer structure 14. Then, thefirst keycap portion 1422 and the second keycap portion 1424 (formed by the film 1410) in the shaped layered structure is processed by laser engraving (on the portions indicated by dashed frames inFIG. 13 ) to form the firstspatial character structure 1422 a and the secondspatial character structure 1424 a. Therein, in practice, theglue 1412 may be formed on the bonded layered structures inFIG. 12 by injection, e.g. through the shapingmold 4 that is made into an injection mold. In addition, in thekeyboard 1, themultilayer structure 14 is fixed on theouter surface 1222 c of theupper casing 1222, so theadhesive layer 151 b is formed on therigid frame sheet 150 of themultilayer structure 14 that is shaped through the shapingmold 4, so as to adhere to theouter surface 1222 c. Or, theadhesive layer 151 b is formed on theouter surface 1222 c alternatively, for therigid frame sheet 150 to adhere thereto. Similarly, theadhesive layer 143 is formed on the surface, toward the keycap, of the innerflexible layer 142 of themultilayer structure 14 that is shaped through the shapingmold 4, so as to adhere to thefirst keycap 126 a and thesecond keycap 126 b. Or, theadhesive layer 143 is formed on thefirst keycap 126 a and thesecond keycap 126 b alternatively, for the innerflexible layer 142 to adhere thereto. Furthermore, theabove multilayer structures 14′ and 34 can also be made in a similar manner, which will not be described in addition. - As described above, when the user presses the keycap, the user's finger actually touches the portion of the multilayer structure (or the flexible light-transmissive layer) corresponding to the keycap. Even during the pressing process, the finger may rub the multilayer structure. Under the protection of the rigid light-transmitting cover sheet, the spatial character structure will not be affected by the rubbing of the finger, at least greatly reducing structural damage to the spatial character structure (including structural deformation of the first spatial character structure) caused by rubbing of the finger.
- Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US18/132,433 US20230245843A1 (en) | 2020-10-21 | 2023-04-10 | Keyswitch structure and keyboard therewith |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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TW109136369 | 2020-10-21 | ||
TW109136369A TWI733607B (en) | 2020-10-21 | 2020-10-21 | Keyswitch structure and keyboard therewith |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US18/132,433 Continuation US20230245843A1 (en) | 2020-10-21 | 2023-04-10 | Keyswitch structure and keyboard therewith |
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US20220122788A1 true US20220122788A1 (en) | 2022-04-21 |
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ID=77911504
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US17/317,889 Abandoned US20220122788A1 (en) | 2020-10-21 | 2021-05-12 | Keyswitch structure and keyboard therewith |
US18/132,433 Pending US20230245843A1 (en) | 2020-10-21 | 2023-04-10 | Keyswitch structure and keyboard therewith |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US18/132,433 Pending US20230245843A1 (en) | 2020-10-21 | 2023-04-10 | Keyswitch structure and keyboard therewith |
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US (2) | US20220122788A1 (en) |
TW (1) | TWI733607B (en) |
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2020
- 2020-10-21 TW TW109136369A patent/TWI733607B/en active
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US20230245843A1 (en) | 2023-08-03 |
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