WO2016082316A1 - 磁性按键及其键盘 - Google Patents

磁性按键及其键盘 Download PDF

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Publication number
WO2016082316A1
WO2016082316A1 PCT/CN2015/070592 CN2015070592W WO2016082316A1 WO 2016082316 A1 WO2016082316 A1 WO 2016082316A1 CN 2015070592 W CN2015070592 W CN 2015070592W WO 2016082316 A1 WO2016082316 A1 WO 2016082316A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
keyboard
middle plate
cap
button
Prior art date
Application number
PCT/CN2015/070592
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English (en)
French (fr)
Inventor
袁建平
陈小兵
Original Assignee
袁建平
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Filing date
Publication date
Application filed by 袁建平 filed Critical 袁建平
Publication of WO2016082316A1 publication Critical patent/WO2016082316A1/zh

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/046—Actuators bistable
    • H01H2221/048—Actuators bistable magnetic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/022—Telephone handset

Definitions

  • the invention relates to a keyboard input device, in particular to a magnetic button and a keyboard thereof, and a mobile phone protection casing using the keyboard.
  • the keyboard is the most commonly used and most important input device.
  • the keyboard can input English letters, numbers, punctuation marks, etc. into the computer, thereby issuing commands and inputting data to the computer, and is widely used in various terminal devices.
  • non-keyboard input methods such as voice input, handwriting input and touch or click input have appeared, but the keyboard is still used by most people because it is a good input method.
  • Cikon Device CN202601435 discloses a magnetic button combination comprising a keycap, a support plate, a switching element, and a frame.
  • the keycap has a fulcrum and the fulcrum is a rotational axis of the keycap, the keycap having a first magnetic element.
  • the support plate is configured to carry the fulcrum, the support plate has a space, the second magnetic element is embedded in the space, and the second magnetic element and the first magnetic element are mutually exclusive.
  • the switching element is located below the keycap.
  • the first magnetic element repels the second magnetic element such that the magnetic key combination is in an off state, when the keycap is subjected to a downward pressure exceeding one
  • the keycap moves downward to actuate the switching element.
  • the Chinese patent document CN103065846 discloses a magnetic push button and a keyboard
  • the magnetic push button includes a bottom plate, a support frame, a first magnetic attraction unit, a key cap and a second magnetic attraction unit
  • the support frame is disposed on the bottom plate.
  • the support frame has an opening
  • the first magnetic unit is disposed on the support frame
  • the key cap is movably disposed between the support frame and the bottom plate, and the key cap moves relative to the bottom plate along a preset direction.
  • the second magnetic unit is disposed at a bottom of the keycap, and the second magnetic unit and the first magnetic unit generate a magnetic adsorption force parallel to the predetermined direction for driving the second magnetic unit to abut At the periphery of the opening, and driving the keycap to pass through the opening.
  • the magnetic button structure in the above technique utilizes the magnetic attraction force of the magnetic attraction unit, so that when the user presses the keycap, an external force is applied to overcome the magnetic attraction force to provide a better operational feel.
  • the magnetic button structure described above is provided with a support frame, the thickness of the magnetic button is large, which limits the development of the button in a thinner direction. Therefore, how to provide a keyboard with a simple structure, a good hand feeling and a thinner is a technical problem that has not been solved in the prior art.
  • the technical problem to be solved by the present invention is that the keyboard of the prior art is thick, the structure of the magnetic keyboard is complicated, and the hand feel is poor, so that a button and a keyboard with simple structure, thin shape and good hand feeling are proposed.
  • the invention also provides a mobile phone protection casing having the above keyboard.
  • a magnetic button that includes:
  • a middle plate located above the sensing element, the middle plate is provided with a button hole and a receiving groove penetrating the upper surface and the lower surface; a magnetic element is disposed in the receiving groove of the middle plate;
  • a metal key cap comprising a cap body and a brim provided in connection with the cap body, wherein the cap body is disposed in the button hole of the middle plate, and a through hole is disposed through the upper and lower surfaces of the cap body; Between the lower surface of the middle plate and the sensing element, and extending below the middle plate receiving groove; when the cap is not pressed by an external force, the magnetic element attracts the metal key cap Hat
  • a soft font having a convex surface on a lower surface thereof, the protrusion passing through a through hole of the metal keycap body and located above the sensing element.
  • the button holes are quadrilateral or polygonal or circular through holes.
  • the receiving groove of the middle plate is symmetrically disposed at a periphery of the button hole of the middle plate.
  • the magnetic element is a permanent magnet.
  • the magnetic element is any one of a neodymium iron boron magnet, a ferrite magnet, an alnico magnet, and an iron chrome cobalt magnet.
  • the metal key cap is a key cap made of a magnetically permeable metal material, preferably a stainless iron key cap.
  • the soft font is formed by a soft material such as TPU or PU or silicone rubber.
  • a film layer is adhered to the surface of the upper plate and/or the lower surface.
  • a keyboard comprising a plurality of magnetic buttons according to any one of the items.
  • the keyboard further includes a circuit board and a housing for assembling the magnetic button and the circuit board, the circuit board being disposed in connection with the sensing elements of each of the magnetic buttons.
  • the bottom plate of the plurality of magnetic buttons of the keyboard is an integrally formed integral bottom plate structure; the sensing elements of the plurality of magnetic buttons of the keyboard are integral integrated sensing elements connected together; and the plurality of magnetic buttons of the keyboard are soft
  • the sexual font is a monolithic soft font structure that is connected into one body; the middle panel of the plurality of magnetic buttons of the keyboard is an integral middle panel structure that is integrally connected.
  • a mobile phone protection case provided with the above keyboard; also provided with:
  • a back cover of the mobile phone and a mobile phone slot is formed on a bottom surface of the back cover of the mobile phone;
  • ferrule device is fixedly connected to one side of the mobile phone receiving slot; the rotating shaft is adapted to be tightly nested in the ferrule device, and is axially engaged with the ferrule device Relative rotation.
  • the magnetic button of the present invention comprises a bottom plate, an inductive element, a middle plate, a magnetic element, a metal key cap, a soft type font; an inductive element disposed above the bottom plate; and a middle plate located at the sensing element Upper, the middle plate is provided with a button hole and a receiving groove penetrating the upper surface and the lower surface; the magnetic element is disposed in the receiving groove of the middle plate; the metal key cap includes the cap body and is connected with the cap body a cap that is disposed in the button hole of the middle plate, and a button hole is disposed through the upper and lower surfaces of the cap; the cap is disposed between the lower surface of the middle plate and the sensing element And extending to the lower portion of the middle plate receiving groove; when the cap body is not pressed by an external force, the magnetic member absorbs the cap of the metal key cap; the lower surface of the soft font has a convex surface, and the convex surface is worn.
  • the through hole of the metal key cap body is located above the sensing element.
  • the magnetic key of the magnetic button of the present invention generates magnetic attraction between the metal key cap and the magnetic element.
  • the soft font and the metal key cap move downward, and the convexity of the soft font touches the output signal of the sensing component, and the cap of the metal key cap and the magnetic component overcome the magnetic adsorption force under the external force.
  • the magnetic attraction force can attract the key cap to rise and reset.
  • the magnetic button provided by the invention has a better hand feeling and greatly reduces the space occupied by the button rebound, which is beneficial to the application in the thin keyboard, and the magnetic button has a simple structure and less materials.
  • the magnetic button of the present invention has a film layer on the surface and/or the lower surface of the middle plate, and the film layer functions as a fixing magnetic element to prevent the magnetic element from loosening and falling off from the middle plate;
  • the metal keycap ⁇ is in direct contact with the surface of the magnetic component to eliminate noise generated when the magnetic component and the metal keycap are attracted;
  • the keyboard of the present invention comprising the plurality of magnetic buttons according to any one of the above.
  • the keyboard further includes a circuit board and a housing for assembling the magnetic button and the circuit board, and the circuit board is connected to the sensing element of each of the magnetic buttons.
  • the keyboard has a simple structure, convenient assembly, better touch, and the keyboard thickness can be controlled below 2.5 mm.
  • the thin design of the keyboard will further make the application of electronic products light and thin, and can be widely used in the fields of ultrabook computers, tablet computers, mobile phone keyboards and the like.
  • FIG. 1 is a schematic diagram showing a simulation state of a magnetic button according to Embodiment 1 of the present invention in an unstressed state;
  • FIG. 2 is a schematic diagram showing a simulation state of a magnetic button according to Embodiment 1 of the present invention under a force state;
  • FIG. 3 is a schematic view of a middle plate according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic view of a metal key cap according to Embodiment 1 of the present invention.
  • Figure 5 is a cross-sectional view showing the metal key cap A-A' according to Embodiment 1 of the present invention.
  • Figure 6 is a schematic view of a middle plate according to Embodiment 2 of the present invention.
  • Figure 7 is a schematic view of a metal key cap according to Embodiment 2 of the present invention.
  • Figure 8 is a schematic diagram of a keyboard according to Embodiment 3 of the present invention.
  • Figure 9 is an exploded view of the keyboard of Embodiment 3 of the present invention.
  • FIG. 10 is a schematic diagram of a protective cover for a mobile phone according to Embodiment 4 of the present invention.
  • Figure 11 is a structural view showing a back cover of a mobile phone according to Embodiment 4 of the present invention.
  • Figure 12 is a schematic diagram of a keyboard according to Embodiment 4 of the present invention.
  • 3,3'-metal key cap 31, 31'-cap body; 311, 311'-groove; 312, 312'-through hole; 32, 32'-cap ⁇ ;
  • the magnetic button of the present invention is shown in FIG. 1.
  • the button includes a bottom plate 1, an inductive element 2, a metal keycap 3, a magnetic element 4, a middle plate 5, and a soft font 6.
  • the bottom plate 1 may be made of stainless steel or aluminum alloy to protect the sensing element 2 .
  • the sensing element 2 has a thin film circuit disposed above the bottom plate 1.
  • the middle plate 5 has an upper and lower surface, which is located above the sensing element 2, and the middle plate 5 is provided with a button hole 51 and an upper surface penetrating the upper surface and the lower surface.
  • the slot 52 and the receiving slot 52 are located at the periphery of the button hole 51.
  • each of the button holes 51 has two accommodating grooves 52 which are symmetric with the axis of the button hole 51.
  • the middle plate 5 can select a plate commonly used in the art.
  • the middle plate 5 is an ABS tree with a thickness of 0.3 to 0.8 mm.
  • the grease plate, the sensing element 2 and the bottom plate 1 are sequentially fixed to the lower surface of the intermediate plate 5 by screws.
  • the magnetic element 4 in the present embodiment is preferably a permanent magnet, and may be, for example, any one of a neodymium iron boron magnet, a ferrite magnet, an alnico magnet, and an iron chrome cobalt magnet.
  • the surface of the magnetic element 4 may be subjected to a plating treatment, and in the present embodiment, the surface of the magnetic member 4 is galvanized.
  • the magnetic element 4 is disposed in the accommodating groove 52 of the intermediate plate 5.
  • a groove edge extending into the accommodating groove is disposed along the circumference of the accommodating groove 52, and the groove side wall is thin and Short, the magnetic member 4 is tightly fitted into the accommodating groove 52.
  • a film 7, such as a PET film, is attached to the upper and/or lower surface of the intermediate plate 5 to further prevent the magnetic member 4 from loosening or falling off.
  • the PET film layer should be as thin as possible, for example, 0.05 to 0.1 mm thick.
  • the metal keycap 3 includes a cap body 31 and a cap 32 that is connected to the cap body.
  • a groove 311 is disposed on a lower surface of the cap body 31, and a through hole 312 is disposed on an upper surface of the cap body, and the through hole 312 is disposed through an upper top surface of the groove 311.
  • the brim 32 is connected to the lower end side wall of the cap body 31 and extends outward along the lower end side wall of the cap body 31.
  • the cap body 31 is placed in the button hole 51 of the middle plate 5, and the cross-sectional area of the button hole 51 is not less than the maximum cross-sectional area of the metal key cap 3.
  • the cap 32 is located between the lower surface of the middle plate 5 and the sensing element 2, and the cap 32 extends below the receiving groove 52, that is, the cap 32 extends below the magnetic element 4, and when the cap 31 is unstressed, the metal cap 32 and the magnetic Element 4 is attracted.
  • the metal keycap 3 is a stainless iron key cap.
  • the sensing element 2 and the bottom plate 1 are provided with through holes, and the through holes are located under the cap 32. After the cap 31 is stressed, the metal cap 32 can pass through the through holes of the sensing element 2 and the bottom plate 1.
  • the soft font 6 is formed by using a moderately soft TPU or PU or silicone rubber material.
  • a PU material having a Shore hardness of 90 degrees is preferred.
  • National characters and characters can be printed on the upper surface of the flexible font 6.
  • the center of the lower surface is provided with a protrusion 61 which passes through the through hole of the metal keycap body 31 and is located above the sensing element 2. .
  • the key stroke is related to the length of the protrusion, the thickness of the middle plate, the magnetic adsorption force, and the like, and in order to control the feel of the button, the key stroke is controlled to be 1.2 mm or more, so as a preferred implementation In a manner, the height of the protrusion is set between 0.3 and 0.6 mm.
  • the soft font 6 when the user applies a force to the button, the soft font 6 is squeezed, and the protrusion 61 and the metal key cap 3 on the soft font 6 move downward, and the soft font 6
  • the protrusion 61 touches the output signal of the sensing element 2, and the cap 32 of the metal key cap and the magnetic element 4 are separated from the magnetic adsorption force by an external force, and have a better operating feeling; after removing the force on the button, the magnetic The adsorption force can attract the key cap 3 to rise and reset.
  • the driving direction of the key cap 3 of the present invention is parallel to the moving direction of the key cap 3 relative to the sensing element 2, and the magnetic attraction force is a dynamic mechanism for supporting the rise of the keycap 3. That is, the principle of the button of the present invention is: the key cap 3 When the magnetic adsorption force is greater than the external force, the external force is greater than the magnetic suction. Decline when attached.
  • the magnetic button described in this embodiment includes a bottom plate 1, an inductive element 2, a metal keycap 3', a magnetic element 4, a middle plate 5', and a soft font 6.
  • the middle plate 5' in this embodiment has upper and lower surfaces, and the middle plate 5' is provided with a button hole 51' and a through hole penetrating the upper surface and the lower surface.
  • the slot 52' is provided with a button hole 51' as a rectangular hole, and the receiving groove 52' is located on four sides of the button hole 51'.
  • the intermediate plate 5' is an ABS resin plate having a thickness of 0.4 to 0.6 mm.
  • the lower surface of the intermediate plate 5' has a heat-melting column, and the sensing element 2 and the bottom plate 1 sequentially pass through the heat-melting column, and the sensing element 2 and the intermediate plate 5' are heat-welded and fixed on the bottom plate 1.
  • the magnetic element 4 is tightly fitted into the receiving groove 52'.
  • the metal keycap 3' as shown in Fig. 7, includes a cap body 31' and a brim 32' integrally connected to the cap body.
  • the cap body 31' has a rectangular parallelepiped shape, and a groove is disposed on a lower surface of the cap body 31'.
  • a through hole 312' is disposed on an upper surface of the cap body 31', and the through hole 312' Provided through the upper top surface of the groove.
  • the brim 32' is connected to the lower end side wall of the cap body 31', and extends outward along the four side lower end side walls of the cap body 31'.
  • the cap body 31' is placed in the button hole 51' of the middle plate 5', and the cross-sectional area of the button hole 51' is not less than the maximum cross-sectional area of the metal keycap 3'.
  • the brim 32' is located between the lower surface of the intermediate plate 5' and the sensing element 2, and the brim 32' extends below the receiving groove 52', that is, the brim 32' extends below the magnetic element 4.
  • the upper surface of the soft font 6 is printed with national characters and characters, and the center of the lower surface is provided with a protrusion 61 which passes through the through hole of the metal keycap body 31' and is located at the sensing element 2 Above.
  • the keyboard includes a plurality of magnetic buttons according to the present invention.
  • the keyboard further includes a circuit board and a casing for assembling the magnetic button and the circuit board, and the circuit board is connected to the sensing element of each of the magnetic buttons.
  • the plurality of keys, the middle board, the sensing element, the bottom board, and the soft font of the keyboard may be respectively configured as a unitary structure.
  • the button hole of the middle plate is set according to the number of the desired word keys and the arrangement.
  • a receiving slot is disposed between each adjacent two button holes of the board in the integral keyboard. Considering one of the factors affecting the magnitude of the magnetic attraction between the metal button and the magnetic element is the contact area of the two.
  • the cap of the metal key cap extends to nearly half of the accommodating groove (extended direction) Length).
  • This embodiment also provides a mobile phone protection case using the above keyboard.
  • the back cover of the mobile phone and any of the above keyboards are included.
  • a mobile phone placement slot 8 is formed on the bottom surface of the back cover of the mobile phone.
  • the The size of the mobile phone slot 8 can be the same as the size of the battery cover of the mobile phone.
  • the battery cover of the mobile phone is removed and then installed on the mobile phone slot 8 during use; the internal size of the mobile phone slot 8 can also be set to The size of the outer casing of the mobile phone is the same, and the mobile phone is directly placed in the mobile phone slot 8 .
  • the thickness of the groove side of the mobile phone placement slot is suitably 0.5 mm to 1.5 mm.
  • each of the connectors comprises:
  • the transition surface 81 is disposed perpendicular to the bottom surface, and the transition surface 81 is a curved surface formed along a sidewall of the mobile phone receiving slot 8;
  • the limiting surface 82 is disposed to be connected to the transition surface 81 while being perpendicular to the bottom surface and parallel to the sidewall of the mobile phone receiving slot 8 .
  • the limiting recess 821 is disposed on the limiting surface 82 . on;
  • a cover plate 83 is disposed between the transition surface 81 and the limiting surface 82 and parallel to the bottom surface, and the cover plate 83 is connected to the side of the transition surface 81 and the limiting surface 82 away from the bottom surface.
  • a fastening slot 831 is disposed through the cover plate 83 and the limiting surface 82.
  • the fastening slot 831 is disposed in communication with the limiting recess 821.
  • the fastening slot 831 and the limiting recess are disposed.
  • the opening width of the 821 joint is smaller than the width of the limiting groove 821.
  • the connecting member in the embodiment may be disposed to be respectively connected with two parallel wall surfaces disposed on one side of the mobile phone receiving slot, and a limiting groove is respectively disposed on the two wall surfaces. 821 can be.
  • the mobile phone protection cover of the embodiment is further provided with a rotating shaft 9 in a fixed connection with the keyboard.
  • the rotating shaft 9 is disposed adjacent to a side of the lower cover of the keyboard, as an optional implementation.
  • the rotating shaft 9 in this embodiment includes two fixing rods 91 and two connecting rods 92, wherein the two fixing rods 91 are symmetrically and fixedly connected to one side of the lower keyboard cover;
  • the connecting rods 92 are respectively connected to the opposite sides of the two fixing rods 91 and are coaxially disposed with the fixing rods 91.
  • the two connecting rods 92 are respectively nested in the two limiting grooves 821.
  • the diameter of the connecting rod 92 is smaller than the diameter of the fixing rod 91.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

一种磁性按键及其键盘，按键包括底板(1)、感应元件(2)、中板(5)、磁性元件(4)、金属键帽(3)、软性字体(6)；感应元件设置在底板上方；中板位于感应元件的上方，中板上设置有贯穿上表面和下表面的按键孔(51)和容置槽(52)；磁性元件置于中板的容置槽内；金属键帽具有帽体(31)和帽檐(32)，帽体置于中板按键孔中，且帽体上表面具有通孔(312)，帽檐位于中板下表面和感应元件之间，且延伸至中板容置槽下方；帽体未受外力挤压时，磁性元件吸合金属键帽的帽檐；软性字体下表面具有凸起(61)，凸起穿过金属键帽帽体的通孔，位于感应元件的上方。该磁性按键适用于薄型键盘，解决了现有技术中键盘较厚，磁吸键盘结构复杂、手感差的技术问题。

Description

磁性按键及其键盘 技术领域
本发明涉及一种键盘输入设备，具体地说涉及一种磁性按键及其键盘，及应用该键盘的手机保护外壳。
背景技术
键盘是当前最常用也是最主要的输入设备，通过键盘可以将英文字母、数字、标点符号等输入到计算机中，从而向计算机发出命令、输入数据等，被广泛应用于各种终端设备上。随着技术的发展，出现了声控输入，手写输入和触摸或点击输入等多种非键盘输入方式，但由于键盘作为具有良好手感的输入方式，仍然被多数人所采用。
随着消费性电子产品逐渐轻薄化的发展趋势，键盘也相应地被设计为更轻更薄的结构，如磁吸式键盘，以适用于薄型电子产品。如中国专利文献CN202601435公开了一种磁性按键组合，该磁性按键组合包含键帽、支撑板、开关元件、框体。键帽具有支点，且该支点为该键帽的转动轴，所述键帽具有第一磁性元件。支撑板用于承载所述支点，所述支撑板具有空间，第二磁性元件嵌设于该空间内，所述第二磁性元件与所述第一磁性元件极性互斥。开关元件位于所述键帽下方。其中，当所述键帽未受力时，所述第一磁性元件排斥所述的第二磁性元件，使所述磁性按键组合处于断开态，当所述键帽所受向下压力超过一预定值时，所述键帽向下运动而致动所述开关元件。上述技术中的磁性按键结构复杂，以转动轴为支点的滑动吸附效果不稳定，与传统键盘输入手感有偏差。
如中国专利文献CN103065846公开了一种磁吸式按键及键盘，该磁吸式按键包含底板、支撑架、第一磁吸单元、键帽以及第二磁吸单元，支撑架设置于该底板上，且该支撑架具有开孔，该第一磁吸单元设置于该支撑架，该键帽以可活动方式设置于该支撑架与该底板的间，该键帽沿着预设方向相对该底板移动。该第二磁吸单元设置于该键帽的底部，该第二磁吸单元与该第一磁吸单元产生平行于该预设方向的磁性吸附力，用以驱动该第二磁吸单元抵靠于该开孔的周缘，且驱动该键帽穿出该开孔。
上述技术中的磁吸式按键结构利用磁吸单元的磁性吸附力，使得使用者在按压键帽时，施加外力克服磁性吸附力以提供较佳的操作手感。但是上述磁吸式按键结构由于设置有支撑架，从而到导致磁吸式按键的厚度较大，限制了按键向更薄的方向发展。因此，如何提供一种结构简单、手感良好且更薄的键盘，是现有技术中尚未解决的技术难题。
发明内容
为此，本发明所要解决的技术问题在于现有技术中键盘较厚，磁吸键盘结构复杂、手感差的问题，从而提出一种结构简单、薄型、手感好的按键及键盘。
本发明还提供一种具有上述键盘的手机保护外壳。
为解决上述技术问题，本发明的技术方案如下：
一种磁性按键，包括：
底板；
感应元件，设置在所述底板上方；
还设置有：
中板，位于所述感应元件的上方，所述中板上设置有贯穿上表面和下表面的按键孔和容置槽；磁性元件，置于所述中板的容置槽内；
金属键帽，包括帽体和与所述帽体连接设置的帽檐，所述帽体置于中板的所述按键孔中，贯穿所述帽体的上下表面设置有通孔；所述帽檐设置在所述中板下表面和所述感应元件之间，且延伸至所述中板容置槽下方；所述帽体未受外力挤压时，所述磁性元件吸合所述金属键帽的帽檐；
软性字体，所述软性字体下表面具有凸起，所述凸起穿过所述金属键帽帽体的通孔，位于感应元件的上方。
所述按键孔为四边形或多边形或圆形通孔。
所述中板的容置槽对称设置在所述中板按键孔的外围。
所述磁性元件为永久磁铁。
所述磁性元件为钕铁硼磁铁、铁氧体磁铁、铝镍钴磁铁、铁铬钴磁铁中的任意一种。
所述金属键帽为可导磁金属材料制备的键帽，优选不锈铁键帽。
所述软性字体由TPU或PU或硅橡胶等软性材料制备成型。
紧贴所述中板上表面和/或下表面具有贴膜层。
一种键盘，包括复数个任意一项所述的磁性按键。
所述键盘还包括电路板和用于装配所述磁性按键和电路板的外壳，所述电路板与每个所述磁性按键的感应元件连接设置。
所述键盘的复数个磁性按键的底板为一体成型的整体式底板结构；所述键盘的复数个磁性按键的感应元件为连接成一体的整体式感应元件；所述键盘的复数个磁性按键的软性字体为连接成一体的整体式软性字体结构；所述所述键盘的复数个磁性按键的中板为连接成一体的整体式中板结构。
一种手机保护外壳，设置有上述键盘；还设置有：
手机背壳，在所述手机背壳的底面上成型有手机置放槽；
转动轴，靠近所述键盘的一侧设置，与所述键盘固定连接；
卡套装置，所述卡套装置与所述手机置放槽的一边固定连接；所述转动轴适宜于胀紧嵌套在所述卡套装置内，且沿轴向与所述卡套装置进行相对旋转。
本发明的上述技术方案相比现有技术具有以下优点：
(1)本发明所述的磁性按键，包括底板、感应元件、中板、磁性元件、金属键帽、软性字体；感应元件，设置在所述底板上方；中板，位于所述感应元件的上方，所述中板上设置有贯穿上表面和下表面的按键孔和容置槽；,磁性元件置于中板的容置槽内；金属键帽，包括帽体和与所述帽体连接设置的帽檐，所述帽体置于中板的所述按键孔中，贯穿所述帽体的上下表面设置有按键孔；所述帽檐设置在所述中板下表面和所述感应元件之间，且延伸至所述中板容置槽下方；所述帽体未受外力挤压时，所述磁性元件吸合所述金属键帽的帽檐；软性字体下表面具有凸起，凸起穿过金属键帽帽体的通孔，位于感应元件的上方。本发明的磁性按键的金属键帽与磁性元件间产生磁性吸附力。使用者在对按键受力时，软性字体及金属键帽向下移动，软性字体的凸起触碰感应元件输出信号，金属键帽的帽檐与磁性元件在外力作用下克服磁性吸附力分离，具有较佳的操作手感；在移除对按键的受力后，磁性吸附力可吸引键帽上升复位。本发明提供的磁性按键在具有较佳手感的同时，大幅缩减按键回弹所占的空间，有利于应用在薄型键盘中，且所述磁性按键结构简单、用料少。
(2)本发明所述的磁性按键，紧贴中板上表面和/或下表面具有贴膜层，贴膜层起固定磁性元件的作用，防止磁性元件松动及从中板上脱落；另一作用是隔离金属键帽帽檐与磁性元件表面直接接触，消除磁性元件与金属键帽吸合时产生的噪音；
(3)本发明所述的键盘，包括复数个上述任意一项所述的磁性按键。所述键盘还包括电路板和用于装配所述磁性按键和电路板的外壳，电路板与每个所述磁性按键的感应元件连接设置。该键盘结构简单、组装方便，触感较佳，且键盘厚度可以控制在2.5mm以下。键盘的薄型设计将进一步使得应用的电子产品轻薄化，可广泛用于超极本电脑、平板电脑、手机键盘等领域。
附图说明
为了使本发明的内容更容易被清楚的理解，下面根据本发明的具体实施例并结合附图，对本发明作进一步详细的说明，其中
图1是本发明实施例1所述磁性按键在未受力状态下的模拟状态图；
图2是本发明实施例1所述磁性按键在受力状态下的模拟状态图；
图3是本发明实施例1所述中板的示意图；
图4是本发明实施例1所述金属键帽的示意图；
图5是本发明实施例1所述金属键帽A-A＇面剖面图
图6是本发明实施例2所述中板的示意图；
图7是本发明实施例2所述金属键帽的示意图；
图8是本发明实施例3所述键盘的示意图；
图9是本发明实施例3所述键盘的分解图；
图10是本发明实施例4所述手机保护外壳的示意图；
图11是本发明实施例4所述手机背壳的结构图；
图12是本发明实施例4所述键盘的示意图。
其中，附图标记为：
1-底板；2-感应元件；
3，3＇-金属键帽；31，31＇-帽体；311，311＇-凹槽；312，312＇-通孔；32，32＇-帽檐；
4-磁性元件；
5，5＇-中板；51，51＇-按键孔；52，52＇-容置槽；
6-软性字体；61-凸起；
7-贴膜；
8-手机置放槽；81-过渡面；82-限位面；821-限位凹槽；83-盖板；831-扣接槽；
9-转动轴；91-固定杆；92-连接杆。
具体实施方式
实施例1
本发明所述的磁性按键如图1所示，该按键包括：底板1、感应元件2、金属键帽3、磁性元件4、中板5和软性字体6。
其中，作为可选择的实施方式，底板1可以选择不锈钢或铝合金材质，起保护感应元件2的作用。所述感应元件2上具有薄膜电路，设置在所述底板1上方。
所述中板5如图3所示，所述中板5具有上、下表面，位于所述感应元件2的上方，中板5上设置有贯穿上表面和下表面的按键孔51和容置槽52，容置槽52位于按键孔51的外围。本实施例中每个按键孔51四周相应的具有以按键孔51轴心为对称点的两个容置槽52。中板5可以选择本领域常用的板材，作为优选方式，中板5为0.3～0.8mm厚的ABS树 脂板，所述感应元件2和底板1依次用螺钉固定于中板5的下表面。
本实施例中所述磁性元件4优选为永久磁铁，例如可以为钕铁硼磁铁、铁氧体磁铁、铝镍钴磁铁、铁铬钴磁铁中的任意一种。作为可选择的实施方式，磁性元件4的表面可进行镀层处理，本实施例中磁性元件4表面镀锌。磁性元件4置于中板5的容置槽52中，作为可选择的实施方式，沿所述容置槽52的四周设置有向容置槽内延伸的槽边，所述槽边壁薄且短，磁性元件4紧密嵌合于容置槽52中。作为可选择的实施方式，在中板5的上和/或下表面上还贴有贴膜7，如PET贴膜，可进一步防止磁性元件4松动或脱落。PET膜层应尽可能的薄，例如可以为0.05～0.1mm厚。
所述金属键帽3如图4、图5所示，包括帽体31和与帽体连接设置的帽檐32。在所述帽体31的下表面上设置有凹槽311，在所述帽体的上表面上设置有通孔312，所述通孔312贯穿所述凹槽311的上顶面设置。所述帽檐32与所述帽体31的下端侧壁连接设置，沿所述帽体31的下端侧壁向外延伸。所述帽体31置于中板5的按键孔51中，所述按键孔51的横截面积不小于金属键帽3的最大横截面积。帽檐32位于中板5的下表面和感应元件2之间，帽檐32延伸至容置槽52下方，即帽檐32延伸至磁性元件4下方，在帽体31未受力时，金属帽檐32与磁性元件4吸合。作为优选的实施方式，所述金属键帽3为不锈铁键帽。所述感应元件2与底板1设置有通孔,所述通孔位于帽檐32下方，在帽体31受力后，金属帽檐32可穿过所述感应元件2与底板1的通孔。
所述软性字体6采用软硬度适中的TPU或PU或硅橡胶材料制备成型，本实施例优选邵氏硬度为90度的PU材料。在软性字体6的上表面可印刷各国文字及字符，下表面中心位置设置有凸起61，所述凸起61穿过所述金属键帽帽体31的通孔，位于感应元件2的上方。在对按键受力时，按键向下移动，凸起触碰到感应元件2，感应元件2输出信号。本发明所述技术方案中，按键行程与凸起的长度、中板的厚度、磁性吸附力等因素有关，且为控制好按键的手感，按键行程要控制在1.2mm以上，因此作为优选的实施方式，所述凸起的高度设置在0.3-0.6mm之间。
如图1、2所示，使用者在对按键施力时，挤压所述软性字体6，所述软性字体6上的凸起61及金属键帽3向下移动，软性字体6的凸起61触碰感应元件2输出信号，金属键帽的帽檐32与磁性元件4在外力作用下克服磁性吸附力分离，具有较佳的操作手感；在移除对按键的受力后，磁性吸附力可吸引键帽3上升复位。本发明的键帽3受磁性吸附力的驱动方向平行于键帽3相对感应元件2的运动方向，磁性吸附力为支撑键帽3上升的动力机制，即本发明按键的原理是：键帽3在磁性吸附力大于外部受力时上升，在外部受力大于磁性吸 附力时下降。
实施例2
本实施例中所述的磁性按键包括：底板1、感应元件2、金属键帽3＇、磁性元件4、中板5＇和软性字体6。作为实施例1的一种变形，如图6所示，本实施例中的中板5＇具有上、下表面，中板5＇上设置有贯穿上表面和下表面的按键孔51＇和容置槽52＇，按键孔51＇为长方形孔，容置槽52＇位于按键孔51＇的四侧。中板5＇为0.4～0.6mm厚的ABS树脂板。所述中板5＇下表面具有热熔柱，感应元件2和底板1依次穿过所述热熔柱，将感应元件2和中板5＇热熔焊接固定在底板1上。所述磁性元件4紧密嵌合于所述容置槽52＇中。
所述金属键帽3＇如图7所示，包括帽体31＇和与帽体一体连接的帽檐32＇。所述帽体31＇为长方体形，在所述帽体31＇的下表面上设置有凹槽，在所述帽体31＇的上表面上设置有通孔312＇，所述通孔312＇贯穿所述凹槽的上顶面设置。所述帽檐32＇与所述帽体31＇的下端侧壁连接设置，沿所述帽体31＇的四侧下端侧壁向外延伸。帽体31＇置于中板5＇的按键孔51＇中，按键孔51＇的横截面积不小于金属键帽3＇的最大横截面积。帽檐32＇位于中板5＇下表面和感应元件2之间，帽檐32＇延伸至容置槽52＇下方，即帽檐32＇延伸至磁性元件4下方。在按键未受力时，每个按键的金属帽檐32＇与四个磁性元件4吸合。
所述软性字体6的上表面印刷各国文字及字符，下表面中心位置设置有凸起61，所述凸起61穿过所述金属键帽帽体31＇的通孔，位于感应元件2的上方。
实施例3
本实施例提供了一种键盘，如图8、图9所示，所述键盘包括复数个本发明所述的磁性按键。本实施例中，所述键盘还包括电路板和用于装配所述磁性按键和电路板的外壳，电路板与每个所述磁性按键的感应元件连接设置。
作为优选的实施方式，所述键盘的复数个按键、中板、感应元件、底板、软性字体可以分别设置为整体式结构。其中，中板的按键孔按照所需字键个数及排列方式设置。为尽可能的简化键盘结构，同样作为优选的实施方式，所述整体式键盘中板的每相邻两个按键孔间设置有一个容置槽。考虑到影响金属按键与磁性元件间磁吸力度大小的因素之一即为两者的接触面积，作为优选的实施方式，所述金属键帽的帽檐延伸至容置槽下方接近一半(延伸方向的长度)处。
实施例4
本实施例还提供了一种使用上述键盘的手机保护外壳。如图10所示，包括手机背壳和上述任一项键盘。在所述手机背壳的底面上成型有手机置放槽8。作为可选择的实施方式，所述 手机置放槽8的尺寸可以与手机电池盖的尺寸设置相同，在使用时将手机电池盖卸下再装上手机置放槽8；也可以将手机置放槽8的内部尺寸设置成与所述手机的外壳尺寸相一致，将手机直接置于手机置放槽8内。本实施例中所述手机置放槽的槽边的厚度适宜为0.5mm-1.5mm。
如图11所示，与所述手机置放槽8的一边还连接设置有两个连接件，作为优选的实施方式，本实施例中所述两个连接件分别与所述手机置放槽8一边的两个角连接，其中每个所述连接件包括：
过渡面81，垂直于所述底面设置，所述过渡面81为沿所述手机置放槽8的侧壁延伸成型的曲面；
限位面82，与所述过渡面81连接设置，同时垂直于所述底面且与所述手机置放槽8的侧壁相互平行，所述限位凹槽821设置在所述限位面82上；
盖板83，位于所述过渡面81和限位面82之间且与所述底面平行，所述盖板83与所述过渡面81和限位面82远离所述底面的侧边连接设置，贯穿所述盖板83和所述限位面82设置有扣接槽831，所述扣接槽831与所述限位凹槽821连通设置，所述扣接槽831与所述限位凹槽821连接处的开口宽度小于所述限位凹槽821的宽度。作为可选择的实施方式，本实施例中所述连接件也可以设置成分别与所述手机置放槽一边连接设置的两个平行壁面，在所述两个壁面上分别设置一个限位凹槽821即可。
本实施例所述的手机保护外壳，与所述键盘还固定连接设置有转动轴9，如图12所示，所述转动轴9靠近所述键盘下盖的一侧设置，作为可选择的实施方式，本实施例中的所述转动轴9包括两个固定杆91和两个连接杆92，其中所述两个固定杆91与所述键盘下盖的一侧对称固定连接；所述两个连接杆92分别与所述两个固定杆91的相背一侧连接且与所述固定杆91同轴设置，所述两个连接杆92分别嵌套在所述两个限位凹槽821内；所述连接杆92的直径小于所述固定杆91的直径。
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。

Claims (12)

  1. 一种磁性按键，包括：
    底板；
    感应元件，设置在所述底板上方；
    其特征在于，还设置有：
    中板，位于所述感应元件的上方，所述中板上设置有贯穿上表面和下表面的按键孔和容置槽；磁性元件，置于所述中板的容置槽内；
    金属键帽，包括帽体和与所述帽体连接设置的帽檐，所述帽体置于中板的所述按键孔中，贯穿所述帽体的上下表面设置有通孔；所述帽檐设置在所述中板下表面和所述感应元件之间，且延伸至所述中板容置槽的下方；所述帽体未受外力挤压时，所述磁性元件吸合所述金属键帽的帽檐；
    软性字体，所述软性字体下表面具有凸起；所述凸起穿过所述金属键帽帽体的通孔，位于感应元件的上方。
  2. 根据权利要求1中所述的磁性按键，其特征在于：所述按键孔为四边形或多边形或圆形通孔。
  3. 根据权利要求1中所述的磁性按键，其特征在于：所述中板的容置槽对称设置在所述中板按键孔的外围。
  4. 根据权利要求1或2或3所述的磁性按键，其特征在于：所述磁性元件为永久磁铁。
  5. 根据权利要求4所述的磁性按键，其特征在于：所述磁性元件为钕铁硼磁铁、铁氧体磁铁、铝镍钴磁铁、铁铬钴磁铁中的任意一种。
  6. 根据权利要求1-5任一所述的磁性按键，其特征在于：所述金属键帽为可导磁金属材料制备的键帽。
  7. 根据权利要求1-6任一所述的磁性按键，其特征在于：所述软性字体由TPU或PU或硅橡胶等软性材料制备成型。
  8. 根据权利要求1-7任一所述的磁性按键，其特征在于：紧贴所述中板上表面和/或下表面具有贴膜层。
  9. 一种键盘，其特征在于：包括复数个如权利要求1-8中任意一项所述的磁性按键。
  10. 根据权利要求9所述的键盘，其特征在于：所述键盘还包括电路板和用于装配所述磁性按键和电路板的外壳，所述电路板与每个所述磁性按键的感应元件连接设置。
  11. 根据权利要求9或10所述的键盘，其特征在于：所述键盘的复数个磁性按键的底板为一体成型的整体式底板结构；所述键盘的复数个磁性按键的感应元件为连接成一体的整体式 感应元件；所述键盘的复数个磁性按键的软性字体为连接成一体的整体式软性字体结构；所述所述键盘的复数个磁性按键的中板为连接成一体的整体式中板结构。
  12. 一种手机保护外壳，其特征在于，设置有权利要求9-11所述的键盘；还设置有：
    手机背壳，在所述手机背壳的底面上成型有手机置放槽；
    转动轴，靠近所述键盘的一侧设置，与所述键盘固定连接；
    卡套装置，所述卡套装置与所述手机置放槽的一边固定连接；所述转动轴适宜于胀紧嵌套在所述卡套装置内，且沿轴向与所述卡套装置进行相对旋转。
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