CN107622901B - Keyboard - Google Patents

Keyboard Download PDF

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Publication number
CN107622901B
CN107622901B CN201610560837.0A CN201610560837A CN107622901B CN 107622901 B CN107622901 B CN 107622901B CN 201610560837 A CN201610560837 A CN 201610560837A CN 107622901 B CN107622901 B CN 107622901B
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China
Prior art keywords
pressure
strength
keyboard
press
sensing
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Expired - Fee Related
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CN201610560837.0A
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Chinese (zh)
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CN107622901A (en
Inventor
陈仲渊
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Primax Electronics Ltd
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Primax Electronics Ltd
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Publication of CN107622901A publication Critical patent/CN107622901A/en
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Publication of CN107622901B publication Critical patent/CN107622901B/en
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Abstract

The present invention is about a kind of keyboard, including bottom plate, the pressure-sensing layer with multiple pressure-sensing regions, the first press-key structure and the second press-key structure.First press-key structure and the second press-key structure respectively correspond a pressure-sensing region, and are located at the top in corresponding pressure-sensing region.First press-key structure and the second press-key structure answer different touch pressures and support corresponding pressure-sensing region, and the pressure-sensing region is made to generate different pressure-sensing signals.The present invention replaces multiple pressure sensing elements with pressure-sensing layer, to simplify its assembling process, and can reduce assembling cost.

Description

Keyboard
Technical field
The present invention is about a kind of keyboard, in particular to the keyboard for using mechanical key structure.
Background technique
Common computer peripheral equipment input unit includes mouse, keyboard and trace ball etc., and wherein keyboard can directly key in text Word and symbol give computer, therefore the attention quite by user and input unit manufacturer.Wherein, relatively conventional is one Kind includes the keyboard of scissor connecting element.
The framework of the press-key structure in keyboard will be illustrated next, and its press-key structure includes scissor connecting element in it In.Referring to Fig. 1, its diagrammatic cross-sectional side elevation for the press-key structure of existing keyboard.Existing press-key structure 1 includes button cap 11, scissor connecting element 12, elastic rubbery body 13, film switch circuit 14 and bottom plate 15, and bottom plate 15 is pressed to carry Keycap 11, scissor connecting element 12, elastic rubbery body 13 and film switch circuit 14.Wherein scissor connecting element 12 is used With connecting bottom board 15 and button cap 11.
Film switch circuit 14 has multiple press-button contacts (not shown in the figures).Press-button contact output when being triggered Corresponding push button signalling.Elastic rubbery body 13 is set on film switch circuit 14 and an elastic rubbery body 13 corresponds to one A press-button contact, when elastic rubbery body 13 is touched, deformation occurs and presses in film switch circuit 14 for elastic rubbery body 13 Corresponding press-button contact and generate push button signalling.
Scissor connecting element 12 is between bottom plate 15 and button cap 11 and is separately connected the two.Scissor connecting element 12 include the first frame 121 and the second frame 122.The first end of first frame 121 is connected to button cap 11, and the first frame 121 second end is then connected to bottom plate 15.Elastic rubbery body 13 is surround by scissor connecting element 12.In addition, the first frame 121 Including the first button cap jack-post 1211 and the first bottom plate jack-post 1212.First frame 121 is by the first button cap jack-post 1211 And it is connected to button cap 11, and be connected to bottom plate 15 using the first bottom plate jack-post 1212.And the second frame 122 and the first frame 121 combine, and the first end of the second frame 122 is connected to bottom plate 15, and the second end of the second frame 122 is then connected to button cap 11.Wherein, the second frame 122 includes the second button cap jack-post 1221 and the second bottom plate jack-post 1222.Second frame 122 by Its second button cap jack-post 1221 and be connected to button cap 11, and be connected to bottom plate 15 using the second bottom plate jack-post 1222.
The operation situation that present press-key structure 1 is pressed by user will be illustrated next.In Fig. 1, when user presses key When cap 11,11 stress of button cap and pushing against scissor connecting element 12 makes its movement, therefore button cap 11 can be past relative to bottom plate 15 Lower movement and press corresponding elastic rubbery body 13.At this point, deformation occurs and presses film switch circuit for elastic rubbery body 13 14 to trigger the press-button contact of film switch circuit 14, so that film switch circuit 14 exports corresponding push button signalling.And work as User stops when pressing button cap 11, the no longer stress of button cap 11 and stop pressing elastic rubbery body 13 so that elastic rubber Body 13 restores to the original state in response to its elasticity, while providing elastic restoring force up, therefore button cap 11 is pushed back touched Position before.
In response to the progress of science and technology, user pursues and more preferably presses feel, therefore releases a kind of mechanical key knot on the market Structure.Referring to Fig. 2, its structural decomposition diagram for the mechanical key structure of existing keyboard.Existing machinery formula press-key structure 2 Including button cap (not shown in the figures), pedestal 21, upper cover 22, push piece 23, moving part 24, the first elastic slice 25, the second elastic slice 26 and the circuit board (not shown in the figures) except pedestal 21,22 covering base 21 of upper cover, and upper cover 22 have upper cover Aperture 221, moving part 24 are set to the centre of pedestal 21 and can move up and down relative to pedestal 21.First elastic slice 25 is set to On pedestal 21 and close to the side wall of pedestal 21, and the second elastic slice 26 is set on pedestal 21 and is located at moving part 24 and the first bullet Between piece 25.Push piece 23 and moving part 24 are arranged at jointly on pedestal 21, push piece 23 pass through upper cover aperture 221 and can be with Button cap combines.Wherein, the first elastic slice 25 and the second elastic slice 26 are electrically connected in circuit board.
In Fig. 2, moving part 24 has protrusion 241, extends from the side wall of moving part 24 toward the direction of the first elastic slice 25 And it is formed.On the other hand, the first elastic slice 25 includes fixed part 251 and springing part 252, and fixed part 251 is fixed in pedestal 21 On, and springing part 252 is to be extended by fixed part 251 and formed, springing part 252 can be contacted with the protrusion 241 of moving part 24 and It is mobile relative to fixed part 251.
When user presses button cap, button cap pushes push piece 23 down, so that moving part connected to it 24 is past Lower movement, at this point, the protrusion 241 of moving part 24 is contacted with springing part 252 and moved down along springing part 252.In moving part 24 in response to user touch pressure and during fast moving, moving part 24 can quickly move through springing part 252 and it is protruded Portion 241 pushes against springing part 252, keeps springing part 252 mobile relative to fixed part 251 and hits the second elastic slice 26, by the first bullet The contact of piece 25 and the second elastic slice 26, circuit board export corresponding push button signalling.It is connect in the first elastic slice 25 and the second elastic slice 26 While touching, it may occur that the sound, to provide user's feedback sense pressed really.
Since mechanical key structure 2 can issue the sound of collision when pressing button cap, feedback sense can be given, therefore machine Tool formula press-key structure 2 is liked by certain users.However, the first elastic slice 25 in existing machinery formula press-key structure 2 and Second elastic slice 26 has to pass through pedestal 21, is just able to connect with circuit board, and otherwise the running of its mechanical key structure 2 will be unable to Generate push button signalling.And there are multiple mechanical key structures 2 in keyboard, it must sequentially will be each in the assembling process of Yu Jianpan The first elastic slice 25 and the second elastic slice 26 in mechanical key structure 2 are electrically connected with circuit board, and assembly working not only consumes When and it is laborious, thus promote assembling cost.
Therefore, it is necessary to the keyboards that one kind can reduce assembling cost.
Summary of the invention
The technical problem to be solved in the present invention is that In view of the above shortcomings of the prior art, providing one kind can reduce Assemble the keyboard of cost.
The technical solution adopted by the present invention to solve the technical problems is to provide a kind of keyboard, including bottom plate, pressure-sensing Layer, the first press-key structure and the second press-key structure.The pressure-sensing layer is located at the top of the bottom plate, which has Multiple pressure-sensing regions, and each pressure-sensing region is to receive one first strength or one second strength.This first is pressed Bond structure is located at the top of the pressure-sensing layer, which corresponds to the pressure-sensing region, to this One strength or second strength push against the pressure-sensing region.Second press-key structure is adjacent to first press-key structure and is located at The top of the pressure-sensing layer, second press-key structure correspond to another pressure-sensing region, to first strength or Second strength pushes against the pressure-sensing region.Wherein, when first press-key structure or second press-key structure by with this first When strength or second strength press, which exports corresponding pressure-sensing signal.
Preferably, the keyboard further includes circuit board and control unit, which is electrically connected at the pressure-sensing layer. The control unit is set on the circuit board and is electrically connected at the pressure-sensing layer, which presets strong-stroke Inquiry table, and the strength-journey inqiuiry table record has first strength, the second strength, first stroke and the second stroke, The control unit to obtain the corresponding first stroke or the second stroke according to first strength or second strength, And output corresponds to a first pressure sensing signal of the first stroke, or output corresponds to a second pressure of the second stroke Sensing signal.
Preferably, when the control unit judges that the pressure-sensing region receives first strength, according to the strength- Journey inqiuiry table obtains the first stroke for corresponding to first strength, and exports the first pressure sensing signal;And work as the control When the unit judges processed pressure-sensing region receives second strength, according to the strength-journey inqiuiry table is obtained to correspond to and is somebody's turn to do The second stroke of second strength, and export the second pressure sensing signal.
Preferably, the keyboard further includes circuit board and control unit, which is electrically connected at the pressure-sensing layer; The control unit is set on the circuit board and is electrically connected at the pressure-sensing layer, to be exported according to first strength pair One corresponding to second strength should be exported in a first pressure sensing signal of first strength, or according to second strength Second pressure sensing signal.
Preferably, first press-key structure includes pedestal, upper cover, displacement piece and elastomer, which has a pedestal Aperture;The upper cover is covered in the pedestal, and the upper cover has a upper cover aperture;The displacement piece is set on the pedestal and passes through should Upper cover aperture, it is mobile relative to the pedestal to touched;The elastomer can be pushed against close to the displacement piece by the displacement piece And deformation occurs and passes through the holes on base.
Preferably, the displacement piece includes ontology, extension and interconnecting piece, which is extended and shape outward by the ontology At, and correspond to the elastomer;The interconnecting piece is set in a first end of the ontology, to connect with a button cap;Wherein, The elastomer is in alignment with the holes on base, and when the displacement piece is mobile relative to the pedestal, which pushes against the elastomer, makes Deformation occurs and passes through the holes on base and supports its corresponding pressure-sensing region for the elastomer.
Preferably, the displacement piece further includes guide-lighting cylinder, which is set in a second end of the ontology, and is somebody's turn to do First press-key structure further includes light-emitting component, which is set on the circuit board, and to generate a light beam, and projecting should Light beam makes first press-key structure shine to the leaded light cylinder.
Preferably, the pressure-sensing layer is set on a upper surface of a circuit board, and each pressure-sensing region has There is an aperture, which passes through the corresponding aperture and be set on the upper surface of the circuit board.
Preferably, the pressure-sensing layer is set on the bottom plate and close to a lower surface of a circuit board, the circuit board With a circuit board aperture, which is directed at the holes on base and the elastomer, makes the elastomer that deformation occurs The holes on base and the circuit board aperture can be passed through and support its corresponding pressure-sensing region.
Preferably, first press-key structure further includes elastic element, the elastic element be sheathed on the leaded light cylinder and with The base contacts keep the displacement piece mobile relative to the pedestal to provide an elastic force.
Preferably, first press-key structure further includes elastic slice, which is set on the pedestal and is located at the displacement piece Side;And the displacement piece further includes pushing and pressing part, which is extended outward by the ontology and is formed, and close to the elastic slice, uses To support the elastic slice when displacement piece is mobile relative to the pedestal, the elastic slice is set to swing and hit the pushing and pressing part, to generate sound It rings.
Preferably, the elastomer is connected to the extension, and it is located at the side of the ontology;Wherein, when the displacement piece is opposite When the pedestal is mobile, which drives the elastomer to pass through the holes on base, and supports its corresponding pressure-sensing region.
Preferably, the elastomer is set on the pedestal and protrudes into the holes on base;Wherein, when the displacement piece is relative to this When pedestal is mobile, which pushes against the elastomer, and making the elastomer, deformation occurs and passes through the holes on base, and it is right to support its The pressure-sensing region answered.
Preferably, the elastomer is located on the pressure-sensing region and protrudes into the holes on base;Wherein, when the displacement piece phase When mobile for the pedestal, which protrudes into the holes on base and pushes against the elastomer, and making the elastomer, deformation occurs and supports Push up its corresponding pressure-sensing region.
Light-emitting component is provided in keyboard of the present invention and with displacement piece made by translucent material, so that press-key structure has Have light-emitting function, and be provided with pressure-sensing layer in wherein so that the press-key structure of keyboard can press strength in response to different and Different pressure-sensing signals is exported, to promote the functionality of keyboard;And keyboard of the present invention is used with multiple pressure-sensing areas The pressure-sensing layer in domain, the conducting wire in multiple pressure-sensing regions are set in pressure-sensing layer and in the one of pressure-sensing layer Side forms single a electrical connection section, so that pressure-sensing layer can be electrically connected to circuit board by electrical connection section, to simplify its assembling Process, and reduce assembling cost.In addition, press-key structure of the invention can in response to user demand and choose whether setting elastic slice In the press-key structure for wherein, including elastic slice can provide user pressing feedback sense, and comprising elastic slice press-key structure then There can be lesser volume, and can realize the lightening of press-key structure.
Detailed description of the invention
Fig. 1 is the structure schematic side view of the press-key structure of existing keyboard.
Fig. 2 is the structural profile schematic side view of the mechanical key structure of existing keyboard.
Fig. 3 is partial structurtes decomposition diagram of the keyboard of the present invention in the first preferred embodiment.
Fig. 4 is partial structurtes diagrammatic cross-sectional side elevation of the keyboard of the present invention in the first preferred embodiment.
Fig. 5 is the strength in the control unit of keyboard of the present invention-signal of the journey inqiuiry table in the first preferred embodiment Figure.
Fig. 6 is the cross-sectional side view signal that the first press-key structure of keyboard of the present invention is touched in the first preferred embodiment Figure.
Fig. 7 is partial structurtes diagrammatic cross-sectional side elevation of the keyboard of the present invention in the second preferred embodiment.
Fig. 8 is partial structurtes diagrammatic cross-sectional side elevation of the keyboard of the present invention in third preferred embodiment.
Fig. 9 is partial structurtes diagrammatic cross-sectional side elevation of the keyboard of the present invention in the 4th preferred embodiment.
Figure 10 is partial structurtes diagrammatic cross-sectional side elevation of the keyboard of the present invention in the 5th preferred embodiment.
Figure 11 is partial structurtes diagrammatic cross-sectional side elevation of the keyboard of the present invention in the 6th preferred embodiment.
Figure 12 is the strength in the control unit of keyboard of the present invention-journey inqiuiry table showing in the 6th preferred embodiment It is intended to.
Specific embodiment
It is of the existing technology to solve the problems, such as that the present invention provides a kind of keyboard.Please refer to Fig. 3 and Fig. 4, Fig. 3 is Partial structurtes decomposition diagram of the keyboard of the present invention in the first preferred embodiment, and Fig. 4 is that keyboard of the present invention is preferable in first Partial structurtes diagrammatic cross-sectional side elevation in embodiment.Keyboard 3 of the present invention includes bottom plate 31, pressure-sensing layer 32, the first key Structure 33, the second press-key structure 34, circuit board 35 and control unit 36 include wherein multiple press-key structures in keyboard 3, figure In only show the first press-key structure 33 and the second press-key structure 34 as representing.Pressure-sensing layer 32 is located at the top of bottom plate 31 And be set on the upper surface of circuit board 35, pressure-sensing layer 32 has multiple pressure-sensing regions 321, and each pressure-sensing Region 321 corresponds to a press-key structure, can be pushed against by corresponding press-key structure and receive the first strength or the second strength. First press-key structure 33 is located at the top of pressure-sensing layer 32, and the first press-key structure 33 corresponds to one in pressure-sensing layer 32 A pressure-sensing region 321 can push against pressure-sensing region 321 with the first strength or the second strength, and make the output of keyboard 3 the One pressure-sensing signal or second pressure sensing signal.Similar to the first press-key structure 33, the second press-key structure 34 is adjacent to One press-key structure 33 and the top for being located at pressure-sensing layer 32, the second press-key structure 34 correspond to another in pressure-sensing layer 32 A pressure-sensing region 321 can push against pressure-sensing region 321 with the first strength or the second strength, and make the output of keyboard 3 the One pressure-sensing signal or second pressure sensing signal.
Circuit board 35 is electrically connected at pressure-sensing layer 32, and control unit 36 is set on circuit board 35 and is electrically connected at Pressure-sensing layer 32, function judge stroke and the production of press-key structure for the force according to received by pressure-sensing layer 32 Raw corresponding pressure-sensing signal.By taking the first press-key structure 33 is pressed by user as an example, when control unit 36 is by pressure Sensed layer 32 obtains user and is applied to the strength of the first press-key structure 33, and when judging its strength for the first strength, acquisition Corresponding to the first stroke of the first strength, and generate the first pressure sensing signal for corresponding to first stroke.And work as control unit 36 when judging its strength for the second strength, obtains the second stroke for corresponding to the second strength, and generate and correspond to second stroke Second pressure sensing signal.Corresponding pressure-sensing signal how is judged and generated as control unit 36, it will be detailed in later It describes in detail bright.In this preferred embodiment, circuit board 35 is printed circuit board (PCB), and control unit 36 is set in the form of firmware It is placed on circuit board 35, is only to illustrate to be used, the present invention should not be as limit.In another preferred embodiment, control unit To be set to the microprocessor on circuit board.
The internal structure of the first press-key structure 33 will be illustrated next.In Fig. 3 and Fig. 4, the first press-key structure 33 includes pressing Keycap 330, pedestal 331, upper cover 332, displacement piece 333, light-emitting component 334, elastic element 335 and elastomer 336.Pedestal 331 include transmission region 3311 and holes on base 3312, and transmission region 3311 is set to the bottom of pedestal 331 and corresponds to hair Optical element 334, and holes on base 3312 is also set to the bottom of pedestal 331 and is located at the side of transmission region 3311.Upper cover 332 Be covered in pedestal 331, and upper cover 332 has the upper cover aperture 3321 corresponding to displacement piece 333 so that button cap 330 be able to The first end of displacement piece 333 connects.Displacement piece 333 is set on pedestal 331 and passes through upper cover aperture 3321 and be able to and key Cap 330 connects, and the function of displacement piece 333 is can be mobile relative to pedestal 331 when being pressed by user.Elastic element 335 is arranged In in displacement piece 333, and light-emitting component 334 is set to the lower section on the upper surface of circuit board 35 and being located at pedestal 331, and shine member Part 334 is electrically connected at circuit board 35 and is able to generate light beam B, and projecting beam B is to displacement piece 333.Elastomer 336 close to Displacement piece 333, can be displaced by the pushing and pressing of part 333 and deformation occurs and passes through holes on base 3312, to support corresponding pressure Sensing region 321.
In this preferred embodiment, elastic element 335 is helical spring, and light emitting diode can be used in light-emitting component 334 (LED), and the transmission region 3311 of pedestal 331 is aperture or with made by transparent material, so that light beam B is passed through.It need to especially say Bright, each pressure-sensing region 321 of pressure-sensing layer 32 has an aperture 322, so that light-emitting component 334 may pass through phase Corresponding aperture 322 and be set on the upper surface of circuit board 35.
In Fig. 4, displacement piece 333 includes ontology 3331, interconnecting piece 3332, guide-lighting cylinder 3333 and extension 3334.Even Socket part 3332 is set in the first end of ontology 3331, can be connect with button cap 330.Guide-lighting cylinder 3333 is set to ontology In 3331 second end and close to light-emitting component 334, function is that guidance light beam B passes through interconnecting piece 3332 and is projected to key Cap 330.And extension 3334 is to be extended outward by ontology 3331 and formed, and correspond to elastomer 336, in other words, elastomer 336 are located at the side of guide-lighting cylinder 3333 and in alignment with holes on base 3312, when displacement piece 333 is mobile relative to pedestal 331, Extension 3334 pushes against elastomer 336, and making elastomer 336, deformation occurs and passes through holes on base 3312 and supports corresponding pressure Power sensing region 321.On the other hand, elastic element 335 is sheathed on guide-lighting cylinder 3333 and contacts with pedestal 331, function Displacement piece 333 is given to provide an elastic force, moves displacement piece 333 up relative to pedestal 331.
In this preferred embodiment, ontology 3331, interconnecting piece 3332, guide-lighting cylinder 3333 and extension 3334 are with saturating Made by luminescent material, guide-lighting cylinder 3333 is the lower section to be set to ontology 3331 in conjunction with assembling mode, and extension 3334 is also To be set to the side of ontology 3331 in conjunction with assembling mode.In addition, the second press-key structure 34 and first in this preferred embodiment Press-key structure 33 is identical, and structure then repeats no more.
The running of control unit 36 will be illustrated next.Please refer to Fig. 3~Fig. 5, Fig. 5 is the control list of keyboard of the present invention Strength in member-schematic diagram of the journey inqiuiry table in the first preferred embodiment.Control unit 36 is preset with a strength-stroke Inquiry table S, and journey inqiuiry table S record has the numerical value of multiple strength and the numerical value of multiple strokes, wherein the strength is defined The strength detected by pressure-sensing region 321, and the button cap 330 that stroke is defined as the first press-key structure 33 moves Distance.In Fig. 5, the horizontal axis of journey inqiuiry table S is the numerical value of stroke, and the longitudinal axis of journey inqiuiry table S is then the numerical value of strength, And Fig. 5 shows strength to the curve of stroke.
In Fig. 5, stroke be equal to 0 corresponding to strength be F0, indicate user apply strength F0 press first by bond Structure 33, and button cap 330 does not move, which is because, strength F0 is offset by the elastic force of elastic element 335, therefore button cap 330 It does not move.Section of the stroke equal to 0 to T1 indicates: when the strength that user applies is promoted to F1, can overcome elastic force and make by The distance of the mobile T1 of keycap 330, during this, deformation occurs for elastomer 336.Section of the stroke equal to T1 to T2 indicates: User apply strength gradually promoted, making elastomer 336, deformation occurs, button cap 330 in response to elastomer 336 deformation and after Continuous movement.When the strength that user applies is promoted to F2, the deformation degree of elastomer 336 is reached the limit of, and button cap 330 only may be used It is moved to the distance of T2.And after the strength that user applies is more than F2, button cap 330 also no longer moves.Wherein, stroke is equal to Curve corresponding to section of the T1 to T2 is in non-linear.
The operation situation that user presses the first press-key structure 33 of keyboard 3 of the present invention will be illustrated next, please refer to Fig. 3~Fig. 6, Fig. 6 are the cross-sectional side view signal that the first press-key structure of keyboard of the present invention is touched in the first preferred embodiment Figure.When user gently presses the button cap 330 of the first press-key structure 33,330 stress of button cap and push against displacement piece 333 down, Make displacement piece 333 as button cap 330 moves down relative to pedestal 331.During displacement piece 333 moves down, this 3331 compression elastic element 335 of body keeps button cap 330 mobile and generates stroke, as shown in Figure 6.On the other hand, it is connected to ontology 3331 extension 3334 moves down with ontology 3331, so that the elastomer 336 for being connected to extension 3334 passes through pedestal Aperture 3312, and corresponding pressure-sensing region 321 is supported with the first strength.Therefore, pressure-sensing region 321 receives first Strength and the numerical value for detecting the first strength, and the numerical value for transmitting the first strength gives control unit 36.Control unit 36 can basis The numerical value (for example, F3) and strength of first strength-journey inqiuiry table S and obtain the first stroke corresponding to the first strength F3 T3, and generate the first pressure sensing signal for corresponding to first stroke T3.
When user no longer presses button cap 330, elastic element 335 is replied in response to its elasticity by compressive state, with Elastic force is provided and gives displacement piece 333, displacement piece 333 is made up to move relative to pedestal 331 and return back to the position before being touched. And when user's weight button cap 330, the first press-key structure 33 carries out running same as described above, and control unit 36 receives To the numerical value of the second strength from pressure-sensing region 321.At this point, control unit 36 can be according to the numerical value of the second strength (for example, F2) and strength-journey inqiuiry table S and obtain the second stroke T2 corresponding to the second strength F2, and generate correspondence In the second pressure sensing signal of second stroke T2.
As described above, keyboard 3 of the present invention, which is used in the first press-key structure 33, is arranged elastomer 336, and through control The strength that the preset strength of unit 36 processed-journey inqiuiry table S can allow user to apply is corresponding with the mobile stroke of button cap 330, And reach the pressure-sensing function of multistage.In short, keyboard 3 of the present invention can execute difference in response to different pressure-sensing signals Instruction, with enrich the first press-key structure 33 functionality.In addition, keyboard 3 of the present invention is using with multiple pressure-sensing regions 321 pressure-sensing layer 32, the conducting wire 323 in multiple pressure-sensing regions 321 are set in pressure-sensing layer 32 and in pressure The side of power sensed layer 32 forms an electrical connection section 324, so that pressure-sensing layer 32 can be electrically connected to electricity by electrical connection section 324 Road plate 35, to carry out the electric connection of pressure-sensing layer 32 Yu circuit board 35.Therefore, it can be not required to such as the prior art sequentially to every One press-key structure is electrically connected with circuit board, not only time saving also to reduce assembling cost.
Specifically have three, first, keyboard 3 of the present invention more may be set to operate under different operation modes, example Such as: control unit 36 can set keyboard 3 and be in stroke sense mode or pressure detection mode, the operation of stroke sense mode It has been observed that and repeating no more.When control unit 36, which sets keyboard 3, is in pressure detection mode, control unit 36 can be according to institute The strength that receives and directly export the pressure-sensing signal corresponding to the strength.The operation of its mode is as follows: working as use When person gently presses keycap 330, the first press-key structure 33 carries out running same as described above, and control unit 36 receive from The numerical value of first strength in pressure-sensing region 321, and export the first pressure sensing signal for corresponding to the first strength.Work as use When person's weight button cap 330, the first press-key structure 33 carries out running same as described above, and control unit 36 receive from The numerical value of second strength in pressure-sensing region 321, and export the second pressure sensing signal for corresponding to the second strength.Wherein, The switching that operation mode is carried out in keyboard 3 then can carry out it by a switching element (button, switch etc.).Therefore, of the invention Keyboard 3 can operate under different operation modes, to meet the demand of various users.
Second, in a preferable way, keyboard 3 of the present invention can be set and be in stroke sense mode and pressure detection mode Binding pattern.For example: the strength of the setting of control unit 36 Fig. 5-it is more than or equal to 0 and small in stroke in journey inqiuiry table S In the range of T2, keyboard 3 is in stroke sense mode, and then sets keyboard 3 equal to T2 in stroke and be in pressure detection mode. When keyboard 3 is in stroke sense mode, running repeats no more as hereinbefore.And when the strength that user applies is promoted When to F2, the deformation degree of elastomer 336 is reached the limit of, therefore button cap 330 no longer moves, but 36 change key of control unit at this time Disk 3 enters pressure detection mode, therefore the strength that user is applied is stronger, and control unit 36 is still exportable corresponding to the strength Pressure-sensing signal, to promote the functionality of keyboard 3 of the present invention.
Third, by the setting of keyboard 3 of the present invention, so that the function of the first press-key structure 33 and the second press-key structure 34 It can be changed more successional button, the function of throttle in similar automobile.Such as user is intended to (be not depicted in figure in computer window In) in move down its scroll bar or cursor, user is sustainable to press the press-key structure for corresponding to arrow down, moves down in the past Move its scroll bar or cursor.Wherein, when user gently presses the press-key structure, slowly move down scroll bar cursor, and works as When user is by light buckling more weight press-key structure, the speed of move down scroll bar or cursor is then gradually promoted.Certainly, Its successional push button function is equally applicable in Games Software, to promote the operability of user.Thus, it can be known that key of the present invention Disk 3 can provide successional push button function, in order to user's operation.
Furthermore the present invention more provides and the second preferred embodiment of above-mentioned different ways.Referring to Fig. 7, it is the present invention Partial structurtes diagrammatic cross-sectional side elevation of the keyboard in the second preferred embodiment.Keyboard 4 of the present invention includes bottom plate 41, with multiple The pressure-sensing layer 42 in pressure-sensing region 421, the first press-key structure 43, the second press-key structure 44, circuit board 45 and control Unit 46, and control unit 46 has strength-journey inqiuiry table S (referring to figure 5.).And the first press-key structure 43 includes key Cap (not shown in the figures), pedestal 431, upper cover 432, displacement piece 433, light-emitting component 434, elastic element 435 and elastomer 436, pedestal 431 includes transmission region 4311 and holes on base 4312, and upper cover 432 has the upper cover corresponding to displacement piece 433 Aperture 4321.The structure and function of each element of the keyboard 4 of this preferred embodiment generally with aforementioned first preferred embodiment It is identical, and something in common repeats no more.The keyboard 4 of this preferred embodiment and the difference of aforementioned first preferred embodiment exist In the setting position of pressure-sensing layer 42.
In Fig. 7, pressure-sensing layer 42 is set on bottom plate 41 and close to the lower surface of circuit board 45, and circuit board 45 has There are multiple circuit board apertures 451, each circuit board aperture 451 is directed at the holes on base 4312 of corresponding first press-key structure 43 And elastomer 436.When user presses button cap, displacement piece 433 is moved by pushing and pressing, so that being connected to displacement piece 433 Elastomer 436 sequentially can pass through holes on base 4312 and circuit board aperture 451 and support corresponding pressure-sensing region 421.In short, the pressure-sensing layer 42 of this preferred embodiment is set to the lower section of circuit board 45.
Furthermore the present invention more provides and the third preferred embodiment of above-mentioned different ways.Referring to Fig. 8, it is the present invention Partial structurtes diagrammatic cross-sectional side elevation of the keyboard in third preferred embodiment.Keyboard 5 of the present invention includes bottom plate 51, with multiple The pressure-sensing layer 52 in pressure-sensing region 521, the first press-key structure 53, the second press-key structure 54, circuit board 55 and control Unit 56, and control unit 56 has strength-journey inqiuiry table S (referring to figure 5.).And the first press-key structure 53 includes key Cap (not shown in the figures), pedestal 531, upper cover 532, displacement piece 533, light-emitting component 534, elastic element 535, elastomer 536 And elastic slice 537, pedestal 531 include transmission region 5311 and holes on base 5312, upper cover 532, which has, corresponds to displacement piece 533 upper cover aperture 5321.The structure and function of each element of the keyboard 5 of this preferred embodiment generally with aforementioned first compared with Good embodiment is identical, and something in common repeats no more.The difference of the keyboard 5 of this preferred embodiment and aforementioned first preferred embodiment Place is that the structure of the first press-key structure 53 is different.
It will be illustrated next the structure of the first press-key structure 53, and the first press-key structure of itself and above-mentioned first preferred embodiment 33 differences include: that the first, the first press-key structure 53 further includes elastic slice 537, second, the structure of displacement piece 533, third, bullet The setting of property body 536.In Fig. 7, elastic slice 537 is set to the first side on pedestal 531 and being located at displacement piece 533.Displacement piece 533 is wrapped Include ontology 5331, interconnecting piece 5332, guide-lighting cylinder 5333, extension 5334 and pushing and pressing part 5335.Interconnecting piece 5332 is set to In the first end of ontology 5331, it can be connect with button cap.Guide-lighting cylinder 5333 is set in the second end of ontology 5331, and is connect It is bordering on light-emitting component 534.Extension 5334 is the second side for being extended by ontology 5331 and formed and be located at displacement piece 533 outward, And extension 5334 corresponds to elastomer 536.As for pushing and pressing part 5335, extended outward by ontology 5331 and formed, and is close In elastic slice 537.The function of pushing and pressing part 5335 is to support elastic slice 537 when displacement piece 533 is mobile relative to pedestal 531, makes elastic slice 537 swing and hit pushing and pressing part 5335, to generate the sound.
In this preferred embodiment, interconnecting piece 5332, guide-lighting cylinder 5333, extension 5334 and pushing and pressing part 5335 be with Ontology 5331 is integrally formed, and ontology 5331, interconnecting piece 5332 and guide-lighting cylinder 5333 are made by translucent material.Need spy Do not mentionlet alone it is bright, the guide-lighting cylinder 5333 of this preferred embodiment be by with ontology 5331 it is integrally formed in a manner of be arranged, not with This is limited, and the lower section of ontology 5331 can also be set in conjunction with assembling mode.
In addition, the elastomer 536 of this preferred embodiment is set on pedestal 531 and protrudes into holes on base 5312, without with Extension 5334 connects, that is, the elastomer 536 of this preferred embodiment is to be inverted cone.When displacement piece 533 is relative to pedestal When 531 movement, extension 5334 pushes against elastomer 536 as ontology 5331 is mobile, and making elastomer 536, deformation occurs and passes through Holes on base 5312, and be able to support corresponding pressure-sensing region 521.
Simple declaration user presses the operation situation of the first press-key structure 53 of keyboard 5 of the present invention: when user gently presses When button cap, button cap stress and push against displacement piece 533 down, make displacement piece 533 with button cap relative to pedestal 531 down It is mobile.During displacement piece 533 moves down, 5331 compression elastic element 537 of ontology keeps button cap mobile and generates row Journey.Meanwhile the extension 5334 of ontology 5331 is connected to as ontology 5331 moves down, so that protruding into holes on base 5312 Deformation occurs and passes through holes on base 5312 for elastomer 536, and supports corresponding pressure-sensing region 521 with the first strength. Therefore, pressure-sensing region 521 receives the first strength and detects the numerical value of the first strength, and the numerical value for transmitting the first strength gives Control unit 56.Control unit 56 can it is identical with the first preferred embodiment running and obtain correspond to the first strength the first row Journey, and generate the first pressure sensing signal for corresponding to first stroke.
On the other hand, while displacement piece 533 moves down, elastic slice 537 is supported in the pushing and pressing part 5335 to move down, makes Elastic slice 537 swings and hits pushing and pressing part 5335 in response to its elasticity, to generate the sound.When user no longer presses button cap, Elastic element 537 is replied in response to its elasticity by compressive state, is given displacement piece 533 to provide elastic force, is kept displacement piece 533 opposite It is up moved in pedestal 531 and returns back to the position before being touched.As for user's weight button cap operation situation be similarly, And it repeats no more.
In short, the keyboard 5 of this preferred embodiment is touched because being provided with elastic slice 537 and pushing and pressing part 5335 in button cap During pressure, the first press-key structure 53 can in response to elastic slice 537 and pushing and pressing part 5335 actuation and issue the sound, with provide make The feedback sense that user presses really.
Furthermore the present invention more provides and the 4th preferred embodiment of above-mentioned different ways.Referring to Fig. 9, it is the present invention Partial structurtes diagrammatic cross-sectional side elevation of the keyboard in the 4th preferred embodiment.Keyboard 6 of the present invention includes bottom plate 61, with multiple The pressure-sensing layer 62 in pressure-sensing region 621, the first press-key structure 63, the second press-key structure 64, circuit board 65 and control Unit 66, and control unit 66 has strength-journey inqiuiry table S (referring to figure 5.).And the first press-key structure 63 includes key Cap (not shown in the figures), pedestal 631, upper cover 632, displacement piece 633, light-emitting component 634, elastic element 635, elastomer 636 And elastic slice 637, pedestal 631 include transmission region 6311 and holes on base 6312, upper cover 632, which has, corresponds to displacement piece 633 upper cover aperture 6321.The structure and function of each element of the keyboard 6 of this preferred embodiment generally with aforementioned third compared with Good embodiment is identical, and something in common repeats no more.The difference of the keyboard 6 of this preferred embodiment and aforementioned third preferred embodiment Place is, the setting position of pressure-sensing layer 62.
In Fig. 9, pressure-sensing layer 62 is set on bottom plate 61 and close to the lower surface of circuit board 65, and circuit board 65 has There are multiple circuit board apertures 651, each circuit board aperture 651 is directed at the holes on base 6312 of corresponding first press-key structure 63 And elastomer 636.When user presses button cap, displacement piece 633 is moved by pushing and pressing, so that being connected to displacement piece 633 Elastomer 636 sequentially can pass through holes on base 6312 and circuit board aperture 651 and support corresponding pressure-sensing region 621.Wherein, in response to the position of pressure-sensing layer 62, therefore the length of elastomer 636 is than the elastomer 536 of third preferred embodiment Length be length.In short, the pressure-sensing layer 62 of this preferred embodiment is set to the lower section of circuit board 65.
Furthermore the present invention more provides and the 5th preferred embodiment of above-mentioned different ways.Referring to Fig. 10, it is the present invention Partial structurtes diagrammatic cross-sectional side elevation of the keyboard in the 5th preferred embodiment.Keyboard 7 of the present invention includes bottom plate 71, with multiple The pressure-sensing layer 72 in pressure-sensing region 721, the first press-key structure 73, the second press-key structure 74, circuit board 75 and control Unit 76, and control unit 76 has strength-journey inqiuiry table S (referring to figure 5.).And the first press-key structure 73 includes key Cap (not shown in the figures), pedestal 731, upper cover 732, displacement piece 733, light-emitting component 734, elastic element 735 and elastomer 736.Pedestal 731 includes transmission region 7311 and holes on base 7312, and upper cover 732 has the upper cover corresponding to displacement piece 733 Aperture 7321, and displacement piece 733 includes ontology 7331, interconnecting piece 7332, guide-lighting cylinder 7333 and extension 7334.This is preferably The structure and function of each element of the keyboard 7 of embodiment are generally identical as aforementioned first preferred embodiment, and something in common It repeats no more.The keyboard 7 of this preferred embodiment and aforementioned first preferred embodiment the difference is that, the first press-key structure 73 In elastomer 736 set-up mode it is different.
As seen from Figure 10, the elastomer 736 of the first press-key structure 73 is located on corresponding pressure-sensing region 721 and stretches Enter holes on base 7312, that is, the elastomer 736 of this preferred embodiment is positive and sets cone.Wherein, when displacement piece 733 relative to When pedestal 731 is mobile, extension 7334 protrudes into holes on base 7312 and pushes against elastomer 736, make elastomer 736 deformation occurs and Support pressure-sensing region 721.
Specifically, pressure-sensing layer 72 is arranged in the upper surface of circuit board 75 in the keyboard 7 of this preferred embodiment On, it is not limited thereto.In another preferred embodiment, also settable pressure-sensing layer is on bottom plate and close to circuit board Lower surface.
In addition, the present invention more provides and the 6th preferred embodiment of above-mentioned different ways.Please refer to Figure 11 and figure 12, Figure 11 be partial structurtes diagrammatic cross-sectional side elevation of the keyboard of the present invention in the 6th preferred embodiment, and Figure 12 is the present invention Strength in the control unit of keyboard-schematic diagram of the journey inqiuiry table in the 6th preferred embodiment.Keyboard 8 of the present invention includes Bottom plate 81, the pressure-sensing layer 82 with multiple pressure-sensing regions 821, the first press-key structure 83, the second press-key structure 84, electricity Road plate 85 and control unit 86, and control unit 86 has strength-journey inqiuiry table S*.And the first press-key structure 83 includes Button cap (not shown in the figures), pedestal 831, upper cover 832, displacement piece 833, light-emitting component 834 and elastic element 835.Bottom Seat 831 includes transmission region 8311 and holes on base 8312, and upper cover 832 has the upper cover aperture corresponding to displacement piece 833 8321, and displacement piece 833 includes ontology 8331, interconnecting piece 8332, guide-lighting cylinder 8333 and extension 8334.This is preferably implemented The structure and function of each element of the keyboard 8 of example are generally identical as aforementioned first preferred embodiment, and something in common is no longer It repeats.The keyboard 8 of this preferred embodiment and aforementioned first preferred embodiment the difference is that, in the first press-key structure 83 not It is provided with elastomer.
As seen from Figure 11, elastomer, and the first key are not provided in first press-key structure 83 of this preferred embodiment The length of the extension 8334 of structure 83 is longer than the length of the extension 3334 of the first preferred embodiment, so that extension 8334 To be contacted when displacement portion 833 is pushed against with corresponding pressure-sensing region 82.In addition to this, the knot of the first press-key structure 83 Structure is all identical as the first press-key structure 33 of the first preferred embodiment, and something in common does not repeat then.
In addition, due to being not provided with elastomer in the first press-key structure 83, therefore the strength in control unit 86-stroke is looked into The content for asking table S* can be from the strength of Fig. 5-and journey inqiuiry table S is different.In Figure 12, the horizontal axis of journey inqiuiry table S* is stroke Numerical value, and the longitudinal axis of journey inqiuiry table S* is then the numerical value of strength, and Figure 12 shows strength different from Fig. 5 to the song of stroke Line.Wherein, stroke be equal to 0 corresponding to strength be F0, indicate user apply strength F0 press the first press-key structure 83, and Button cap does not move, which is because, strength F0 is offseted by the elastic force of elastic element 835, therefore button cap does not move.Stroke etc. Indicated in 0 to T1 section: when the strength that user applies is promoted to F1, can overcome elastic force and make the mobile T1 of button cap away from From.Stroke equal to T1 to T4 section indicate: user apply strength gradually promoted, make button cap in response to the strength of application and It continues to move to.When the strength that user applies is promoted to F4, button cap is only movable to the distance of T4.And what user applied After strength is more than F4, button cap is also no longer moved.Wherein, it is linear to be equal to curve corresponding to 0 section to T4 for stroke.It needs It illustrates, keyboard of the present invention can select required journey inqiuiry table S or S* according to the actual situation, various to meet The demand of user.
In a preferable way, keyboard of the present invention more in combination with light-emitting function and pressure-sensing function, such as: work as use When person gently presses keycap, circuit board exports corresponding first pressure sensing signal, and can in response to first pressure sensing signal and It controls light-emitting component and light beam is generated with the first illumination effect.When user's weight button cap, circuit board output corresponding the Two pressure-sensing signals, and light-emitting component can be controlled in response to second pressure sensing signal, light beam is generated with the second illumination effect. Wherein the first illumination effect can be the light beam that slowly flashes, and the second illumination effect can be the light beam of fast blink, whereby for User is light pressure function or weight function visually to pick out it.Above-mentioned combination light-emitting function and pressure-sensing function are retouched It states only to illustrate and be used, be not limited thereto.
As described above, being provided with light-emitting component in keyboard of the present invention and with displacement piece made by translucent material, So that press-key structure has light-emitting function;It is provided with pressure-sensing layer again in wherein, so that the press-key structure of keyboard can be in response to not Same presses strength and exports different pressure-sensing signals, to promote the functionality of keyboard.The prior art can be solved whereby to deposit The problem of.In addition, press-key structure of the invention can in response to user demand and choose whether setting elastic slice in wherein, include Have the press-key structure of elastic slice can provide user pressing feedback sense, and comprising elastic slice press-key structure can then have it is lesser Volume, and can realize the lightening of press-key structure.
Wherein, keyboard of the present invention uses the pressure-sensing layer with multiple pressure-sensing regions, multiple pressure-sensing regions Conducting wire be set in pressure-sensing layer and form single a electrical connection section in the side of pressure-sensing layer so that feeling of stress Circuit board can be electrically connected to by electrical connection section by surveying layer.Therefore, can be not required to such as the prior art sequentially to each press-key structure with Circuit board is electrically connected, to reduce assembling cost.
The foregoing is merely presently preferred embodiments of the present invention, the scope of the claims being not intended to limit the invention, therefore It is all other without departing from the equivalent change or modification completed under disclosed spirit, it is intended to be limited solely by patent of the invention In protection scope.

Claims (13)

1. a kind of keyboard characterized by comprising
Bottom plate;
Pressure-sensing layer, positioned at the top of the bottom plate, which has multiple pressure-sensing regions, and each pressure Sensing region is to receive one first strength or one second strength;
First press-key structure, positioned at the top of the pressure-sensing layer, which corresponds to the pressure-sensing region, To push against the pressure-sensing region with first strength or second strength, which includes:
Pedestal has a holes on base;
Upper cover is covered in the pedestal, and the upper cover has a upper cover aperture;
Displacement piece is set on the pedestal and passes through the upper cover aperture, mobile relative to the pedestal to touched;And
Elastomer, close to the displacement piece, can be pushed against by the displacement piece and deformation occurs and pass through the holes on base;And
Second press-key structure, adjacent to first press-key structure and positioned at the top of the pressure-sensing layer, second press-key structure Corresponding to another pressure-sensing region, to push against the pressure-sensing region with first strength or second strength;Wherein, When first press-key structure or second press-key structure are pressed with first strength or second strength, the keyboard output phase Corresponding pressure-sensing signal.
2. keyboard as described in claim 1, which is characterized in that the keyboard further include:
Circuit board is electrically connected at the pressure-sensing layer;And
Control unit is set on the circuit board and is electrically connected at the pressure-sensing layer, which presets strong- Journey inqiuiry table, and the strength-journey inqiuiry table record has first strength, second strength, first stroke and the second row Journey, the control unit is to obtain the corresponding first stroke or second row according to first strength or second strength Journey, and the first pressure sensing signal for corresponding to the first stroke is exported, or output corresponds to the one second of the second stroke Pressure-sensing signal.
3. keyboard as claimed in claim 2, which is characterized in that when the control unit judges that the pressure-sensing region receives this When the first strength, according to the strength-journey inqiuiry table obtains the first stroke for corresponding to first strength, and export this One pressure-sensing signal;And when the control unit judges that the pressure-sensing region receives second strength, according to the strength - journey inqiuiry table obtains the second stroke for corresponding to second strength, and exports the second pressure sensing signal.
4. keyboard as described in claim 1, which is characterized in that the keyboard further include:
Circuit board is electrically connected at the pressure-sensing layer;And
Control unit is set on the circuit board and is electrically connected at the pressure-sensing layer, to defeated according to first strength Correspond to a first pressure sensing signal of first strength out, or is exported according to second strength corresponding to second strength A second pressure sensing signal.
5. keyboard as described in claim 1, which is characterized in that the displacement piece includes:
Ontology;
Extension is extended outward by the ontology and is formed, and corresponds to the elastomer;And
Interconnecting piece is set in a first end of the ontology, to connect with a button cap;Wherein, the elastomer is in alignment with this Holes on base, when the displacement piece is mobile relative to the pedestal, which pushes against the elastomer, and making the elastomer, deformation occurs And it passes through the holes on base and supports its corresponding pressure-sensing region.
6. keyboard as claimed in claim 5, which is characterized in that the displacement piece further includes guide-lighting cylinder, leaded light cylinder setting In in a second end of the ontology, and first press-key structure further includes light-emitting component, which is set to a circuit board On, to generate a light beam, and the light beam is projected to the leaded light cylinder, first press-key structure is made to shine.
7. keyboard as claimed in claim 6, which is characterized in that the pressure-sensing layer is set to a upper surface of the circuit board On, and each pressure-sensing region has an aperture, which passes through the corresponding aperture and is set to the circuit board The upper surface on.
8. keyboard as claimed in claim 6, which is characterized in that the pressure-sensing layer is set on the bottom plate and close to the electricity A lower surface of road plate, the circuit board have a circuit board aperture, which is directed at the holes on base and the elasticity Body makes the elasticity physical efficiency that deformation occurs pass through the holes on base and the circuit board aperture and support its corresponding pressure-sensing Region.
9. keyboard as claimed in claim 6, which is characterized in that first press-key structure further includes elastic element, elasticity member Part is sheathed on the leaded light cylinder and moves the displacement piece relative to the pedestal to provide an elastic force with the base contacts It is dynamic.
10. keyboard as claimed in claim 5, which is characterized in that first press-key structure further includes elastic slice, which is set to Side on the pedestal and positioned at the displacement piece;And the displacement piece further includes pushing and pressing part, which is extended outward by the ontology And formed, and close to the elastic slice, to support the elastic slice when displacement piece is mobile relative to the pedestal, swing the elastic slice And the pushing and pressing part is hit, to generate the sound.
11. keyboard as claimed in claim 5, which is characterized in that the elastomer is connected to the extension, and is located at the ontology Side;Wherein, when the displacement piece is mobile relative to the pedestal, which drives the elastomer to pass through the holes on base, and Support its corresponding pressure-sensing region.
12. keyboard as claimed in claim 5, which is characterized in that the elastomer is set on the pedestal and protrudes into the pedestal and opens Hole;Wherein, when the displacement piece is mobile relative to the pedestal, which pushes against the elastomer, and making the elastomer, deformation occurs And the holes on base is passed through, and support its corresponding pressure-sensing region.
13. keyboard as claimed in claim 5, which is characterized in that the elastomer is located on the pressure-sensing region and protrudes into this Holes on base;Wherein, when the displacement piece is mobile relative to the pedestal, which protrudes into the holes on base and pushes against the elasticity Body, making the elastomer, deformation occurs and supports its corresponding pressure-sensing region.
CN201610560837.0A 2016-07-15 2016-07-15 Keyboard Expired - Fee Related CN107622901B (en)

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TWM508059U (en) * 2015-05-29 2015-09-01 Roccat GmbH Membrane key structure and membrane keyboard

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Publication number Priority date Publication date Assignee Title
US7608792B1 (en) * 2008-11-17 2009-10-27 Sunrex Technology Corp. Membrane keyboard/keypad with arrangement for uniformly lighting keys from background
CN203386639U (en) * 2013-07-22 2014-01-08 东莞爱旺电子科技有限公司 Key structure of full-color backlit mechanical keyboard
CN204303636U (en) * 2015-01-08 2015-04-29 东莞市索艾电子科技有限公司 A kind of waterproof and dustproof structure of mechanical keyboard
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Granted publication date: 20190416