WO2017035934A1 - 光电式键盘按键 - Google Patents

光电式键盘按键 Download PDF

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Publication number
WO2017035934A1
WO2017035934A1 PCT/CN2015/093364 CN2015093364W WO2017035934A1 WO 2017035934 A1 WO2017035934 A1 WO 2017035934A1 CN 2015093364 W CN2015093364 W CN 2015093364W WO 2017035934 A1 WO2017035934 A1 WO 2017035934A1
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WIPO (PCT)
Prior art keywords
hammer
shaft
light
receiving element
keyboard button
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PCT/CN2015/093364
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English (en)
French (fr)
Inventor
李建平
Original Assignee
东莞市名键电子科技有限公司
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Application filed by 东莞市名键电子科技有限公司 filed Critical 东莞市名键电子科技有限公司
Priority to US15/531,449 priority Critical patent/US10263618B2/en
Publication of WO2017035934A1 publication Critical patent/WO2017035934A1/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
    • H01H13/84—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/968—Switches controlled by moving an element forming part of the switch using opto-electronic devices
    • H03K17/969—Switches controlled by moving an element forming part of the switch using opto-electronic devices having a plurality of control members, e.g. keyboard
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/022—Miscellaneous with opto-electronic switch

Definitions

  • the invention relates to a button, in particular to a photoelectric keyboard button.
  • the keyboard keys are generally divided into mechanical contact type and photoelectric switch type, wherein the photoelectric switch type keyboard keys utilize optocoupler technology instead of mechanical contact type structure, which utilizes optical principle and photoelectric coupling technology to form light from the transmitting element and the receiving element.
  • the path, the light blocking member performs the cutting and conducting of the optical path to change the circuit impedance to realize the circuit switch.
  • the photoelectric switch keyboard has a long life, and the button feels little change after a long time of use.
  • the button feels a single, the touch of the button is not obvious.
  • the invention proposes a photoelectric keyboard button, which has obvious paragraph feeling when touched, has obvious enhancement of photoelectric coupling efficiency, and can achieve better anti-dust effect.
  • the present invention adopts the following technical solutions.
  • Photoelectric keyboard buttons including:
  • circuit board for providing a circuit connection, and a mounting hole is formed on the circuit board
  • An optocoupler assembly is disposed on the circuit board and includes a transmitting component and a receiving component disposed on a side of the mounting hole;
  • a button seat is inserted into the mounting hole, and a guiding basket is formed from the top downward opening, and a light guiding groove is formed on the sidewall of the guiding basket to form an optical path for the transmitting component and the receiving component;
  • the shaft is loaded into the guide basket and can slide up and down along the guide basket;
  • a hammer is placed vertically in the guide basket, and the upper and lower ends thereof are respectively connected with the pressing shaft and the guiding basket through a spring, and the side has a dial block connected with the shaft, and the optical hammer switch is arranged on the hammer, and pressing the shaft
  • the optical hammer switch is arranged on the hammer, and pressing the shaft
  • the optocoupler component can be optionally disposed on the front or back of the circuit board.
  • the bottom of the guiding basket has a limiting platform
  • the top of the limiting platform has a pair of side stops
  • the bottom of the limiting platform has a flat hole for free insertion of the bottom of the hammer, the shape of the bottom of the hammer and the flat Hole fit.
  • the hammer and the limit table can display a clear touch and a button sound
  • the optical path switch on the hammer can shield external stray light interference outside the optocoupler assembly, and the coupling efficiency is higher;
  • the optocoupler component is shielded by the circuit board or the button base, and is not easy to accumulate dust.
  • Figure 1 is a schematic exploded view of the structure of the present invention.
  • Figure 2 is a cross-sectional view of the key pad of the present invention.
  • Fig. 3 is a schematic view showing the structure of the shaft according to the present invention.
  • Figure 4 is a schematic view showing the structure of the ram of the present invention.
  • Fig. 5 is a schematic structural view of an embodiment of the present invention, in which the button is in a pop-up state.
  • Fig. 6 is a schematic view showing still another embodiment of the embodiment shown in Fig. 5, in which the button is in a pressed state.
  • Fig. 7 is a schematic structural view of another embodiment of the present invention.
  • Figure 8 is a schematic view showing the structure of still another embodiment of the present invention.
  • the photoelectric keyboard buttons include:
  • circuit board 1 for providing a circuit connection
  • the circuit board 1 is provided with a mounting hole 11;
  • An optocoupler assembly 2 disposed on the circuit board 1, including a transmitting component 21 and a receiving component 22 disposed on the side of the mounting hole;
  • a button holder 3 is inserted into the mounting hole 11 and defines a guiding basket 31 from the top to the bottom.
  • the side wall of the guiding basket 31 is provided with a light-passing groove 32 for the transmitting element 21 and the receiving member 22 to form a light path. ;
  • the shaft 4 is loaded into the guide basket 31, and can slide up and down along the guide basket 31;
  • a hammer 5 is vertically placed in the guide basket 31, and the upper and lower ends thereof are respectively connected to the pressing shaft 4 and the guiding basket 31 via a spring 6 and a spring 7, and the side surface thereof has a dial 51 connected to the pressing shaft 4,
  • the ejector 5 has an optical path switch 52 for pushing the reciprocating horizontal rotation of the ram 5 through the dial 51 when the shaft 3 is pressed or bounced, for rotating the optical path switch 52 to respectively turn on or block the transmitting element 21 and the receiving element 22.
  • the optocoupler assembly 2 is disposed on the back side of the circuit board 1. Since the optocoupler assembly 2 is disposed on the back surface of the circuit board 1 and dust is not easily reached there, the optocoupler assembly 2 is substantially unaffected by dust. In addition, the insertion of the button holder 3 into the mounting hole 11 also blocks dust from entering the back surface of the circuit board 1, so that the optocoupler assembly 2 is less affected by dust.
  • the bottom of the guiding basket 31 has a limiting stand 33.
  • the top of the limiting stand 33 has a pair of side stops 34.
  • the bottom of the limiting stand 33 has a flat hole for free insertion of the bottom of the punch 5.
  • 35 The shape of the bottom of the hammer 5 is matched with the flat hole 35.
  • FIG. 5 when the button is in the pop-up state, the bottom of the hammer 5 is confined between the side stops 34; as shown in FIG. 6, when the button is pressed, the bottom of the hammer 5 is inserted and confined to the flat. Inside the hole 35.
  • the hammer 5 cooperates with the limit table 33 to exhibit a clear touch and a button sound.
  • the pressing shaft 4 is provided with a sliding slot 41 for sliding the slider 51, the upper portion of which is a vertical guiding slot 411, and the lower portion thereof is a diagonal guiding slot 412; as shown in FIG. 5 and FIG.
  • the dial 51 slides from the oblique guide groove 412 into the vertical guide groove 411 for pushing the hammer 5 to rotate in one direction and is stationary; when the shaft 4 is bounced, the dial 51 is from the vertical guide groove 411. Slide into the oblique guide slot 412 to push the hammer 5 to rotate in the opposite direction and to stand still.
  • the inner shaft 4 is provided with an inner cylinder 42 for inserting the top of the punch 5, and the sliding groove 41 is located at the side wall of the inner cylinder 42.
  • the hammer 5 has two dials 51 arranged symmetrically in the center, and the shaft 4 is also provided with two centrally symmetrically disposed. Chutes.
  • the transmitting element 21 and the receiving element 22 are respectively disposed on opposite sides of the mounting hole 11 , and the optical path switch 52 is horizontally penetrated.
  • the stray light signal leaking from the transmitting element 21 to the surrounding space cannot be transmitted to the receiving element 22 when the button is in the up state, and the effective optical signal of the transmitting element 21 can pass through the light passing hole in the pressed state. Converging to the receiving component 22, the coupling efficiency is higher, and the accuracy of the photoelectric switch is also higher.
  • a light guide body 521 is disposed in the light passing hole.
  • the light guide body 521 can further enhance the effective optical signal of the transmitting element 21 to the receiving element based on the previous embodiment.
  • the effect of 22 further improves the coupling efficiency and the accuracy of the photoelectric switch.
  • the transmitting element 21 and the receiving element 22 are respectively disposed on the same side of the mounting hole 11, and the optical path switch 52 is disposed on the punch 5.
  • the reflector is configured to reflect the light path of the radiating element 21 and the receiving element 22 when the shaft 4 is pressed. When the shaft 4 is bounced, the reflector deflects and blocks the light path of the radiating element 21 and the receiving element 22.
  • the stray light signal leaking from the transmitting element 21 to the surrounding space cannot be transmitted to the receiving element 22 when the button is in the pop-up state, and the effective optical signal of the transmitting element 21 can pass through the reflecting body in the pressed state. Converging to the receiving component 22, the coupling efficiency is higher, and the accuracy of the photoelectric switch is also higher.
  • the transmitting component 21 and the receiving component 22 may be a plug-in chip, or a chip chip.
  • the emitting component 21 and the receiving component 22 use a chip chip, the light emitting side may be designed as a collecting lens structure.

Abstract

一种光电式键盘按键，包括：一电路板（1），用于提供电路连接，电路板上开有一安装孔（11）；一光耦组件（2），设于电路板上，包括置于安装孔侧的一发射元件（21）和一接收元件（22）；一按键座（3），装入安装孔内，其自顶向下开口形成一导引篮（31），导引篮侧壁上设有供发射元件和接收元件形成光通路的通光槽（32）；一按轴（4），按轴装入导引篮内，可沿导引篮上下滑动；一冲锤（5），竖直置于导引篮内，其上下两端分别通过弹簧（6，7）与按轴和导引篮连接，其侧面具有与按轴连接的拨块（51），冲锤上具有光路开关（52），按轴按下或弹起时通过拨块推动冲锤往复水平转动，用以转动光路开关分别导通或阻断发射元件和接收元件之间的光通路。该光电式键盘按键能呈现出明显的按触段落感和按键声，耦合效率更高，不易积尘。

Description

光电式键盘按键 技术领域
本发明涉及按键，具体是一种光电式键盘按键。
背景技术
键盘按键一般分为机械触点式和光电开关式，其中光电开关式键盘按键利用光电耦技术，替代机械触点式结构，其利用光学原理和光电耦合技术，由发射元件和接收元件形成光的通路，阻光件在进行光路的切断与导通以改变电路阻抗实现电路开关。相比于其他键盘，光电开关式键盘按键寿命长，使用长时间之后按键手感变化很小
但目前现有的光电开关式键盘按键均存在如下缺点：
1、发射管和接收管之间没有光路校直及聚光设计，因此发射元件和接收元件的光电耦合效率较低。
2、按键内存积灰尘时，光电耦的灵敏感度会进一步下降。
3、按键手感单一，对按键的按触感官不明显。
发明内容
本发明为了弥补现有技术的不足之处，提出了一种光电式键盘按键，按触时具有明显的段落感，对光电耦合效率具有明显的增强，还能实现较好的抗尘效果。
为了实现以上目的，本发明采用了如下的技术方案。
光电式键盘按键，包括：
一电路板，用于提供电路连接，电路板上开有一安装孔；
一光耦组件，设于电路板上，包括置于安装孔侧的一发射元件和一接收元件；
一按键座，装入安装孔内，其自顶向下开口形成一导引篮，导引篮侧壁上设有供发射元件和接收元件形成光通路的通光槽；
一按轴，按轴装入导引篮内，可沿导引篮上下滑动；
一冲锤，竖直置于导引篮内，其上下两端分别通过弹簧与按轴和导引篮连接，其侧面具有与按轴连接的拨块，冲锤上具有光路开关，按轴按下或弹起时通过拨块推动冲锤往复水平转动，用以转动光路开关分别导通或阻断发射元件和接收元件之间的光通路。
其中，光耦组件可选择设于电路板正面或背面。
其中，导引篮的底部具有限位台，限位台的顶部具有一对侧挡块，限位台的底部具有供冲锤的底部自由插入的扁孔，冲锤的底部的形状与该扁孔配合。
与现有技术相比，本发明的有益效果在于：
(1)按触按键时，冲锤配合限位台能呈现出明显的按触段落感和按键声；
(2)冲锤上的光路开关可以屏蔽光耦组件之外的外部杂光干扰，耦合效率更高；
(3)光耦组件为电路板或按键座遮挡，不易积尘。
下面结合说明书附图和具体实施方式对本发明做进一步的说明。
附图说明
图1是本发明的结构分解示意图。
图2是本发明的按键座的剖视图。
图3是本发明的按轴的结构示意图。
图4是本发明的冲锤的结构示意图。
图5是本发明的一种实施方式的结构示意图，图中按键处于弹起状态。
图6是图5所示的实施方式的又一结构示意图，图中按键处于按下状态。
图7是本发明的另一种实施方式的结构示意图。
图8是本发明的又一种实施方式的结构示意图。
具体实施方式
如图1到图6所示，光电式键盘按键，包括：
一电路板1，用于提供电路连接，电路板1上开有一安装孔11；
一光耦组件2，设于电路板1上，包括置于安装孔侧的一发射元件21和一接收元件22；
一按键座3，装入安装孔11内，其自顶向下开口形成一导引篮31，导引篮31侧壁上设有供发射元件21和接收元件22形成光通路的通光槽32；
一按轴4，按轴4装入导引篮31内，可沿导引篮31上下滑动；
一冲锤5，竖直置于导引篮31内，其上下两端分别通过弹簧6和弹簧7与按轴4和导引篮31连接，其侧面具有与按轴4连接的拨块51，冲锤5上具有光路开关52，按轴3按下或弹起时通过拨块51推动冲锤5往复水平转动，用以转动光路开关52分别导通或阻断发射元件21和接收元件22之间的光通路。
如图5和图6所示，在较佳的实施方式中，光耦组件2设于电路板1的背面。由于光耦组件2设于电路板1的背面，灰尘不易到达该处，所以光耦组件2基本不受积尘影响。此外按键座3装入安装孔11内也阻挡了灰尘进入电路板1的背面，所以光耦组件2更加不受积尘影响。
如图2所示，导引篮31的底部具有限位台33，限位台33的顶部具有一对侧挡块34，限位台33的底部具有供冲锤5的底部自由插入的扁孔35，冲锤5的底部的形状与该扁孔35配合。如图5所示，按键处于弹起状态时，冲锤5的底部局限在侧挡块34之间；如图6所示，按键处于按下状态时，冲锤5的底部插入并局限在扁孔35内。档按键切换与弹起和按下状态时，冲锤5配合限位台33能呈现出明显的按触段落感和按键声。
如图3所示，所述的按轴4内设有供拨块51滑行的滑槽41，其上部为竖直导槽411，其下部为斜向导槽412；如图5和图6所示，按轴4按下时拨块51从斜向导槽412滑入竖直导槽411，用以推动冲锤5单向转动并静止；按轴4弹起时拨块51从竖直导槽411滑入斜向导槽412，用以推动冲锤5反向转动并静止。
如图3所示，在较佳的实施方式中，所述的按轴4内设有供冲锤5的顶部自由插入的内筒42，所述的滑槽41位于内筒42的侧壁。
如图3和图4所示，在较佳的实施方式中，所述的冲锤5上具有中心对称设置的两个拨块51，所述的按轴4内也设有中心对称设置的两个滑槽。
如图5和图6所示，在本发明的一种实施方式中，所述的发射元件21和接收元件22分别置于安装孔11两侧相对设置，所述的光路开关52是水平贯通冲锤5的通光孔；如图5所示，按轴4按下时通光孔构成发射元件21和接收元件22的光通路，如图6所示，按轴4弹起时通光孔在发射元件21和接收元件22的光通路上偏转并将其阻断。在本实施方式中，按键弹起状态下，发射元件21向四周空间泄漏的杂散光信号无法传递到接收元件22，按键按下状态下，发射元件21的有效光信号通过通光孔可以更好的汇聚到接收元件22，耦合效率更高，光电开关的准确性也更高。
如图7所示，在本发明的另一种实施方式中，所述的通光孔内设有导光体521。导光体521可以在上一实施方式的基础上更进一步的增强发射元件21的有效光信号汇聚到接收元件 22的效果，更进一步的提高耦合效率和光电开关的准确性。
如图8所示，在本发明的又一种实施方式中，所述的发射元件21和接收元件22分别置于安装孔11的同侧，所述的光路开关52是设于冲锤5上的反光体；按轴4按下时反光体通过反射构成发射元件21和接收元件22的光通路，按轴4弹起时反光体偏转并阻断发射元件21和接收元件22的光通路。在本实施方式中，按键弹起状态下，发射元件21向四周空间泄漏的杂散光信号无法传递到接收元件22，按键按下状态下，发射元件21的有效光信号通过反光体可以更好的汇聚到接收元件22，耦合效率更高，光电开关的准确性也更高。
对于本领域的技术人员来说，可根据本实用新型所揭示的结构和原理获得其它各种相应的改变以及变形，而所有的这些改变以及变形都属于本发明的保护范畴。比如，发射元件21和接收元件22可采用插接式芯片，也可以采用贴片式芯片，在发射元件21和接收元件22采用贴片式芯片时可以将其发光侧面设计为聚光透镜结构。

Claims (9)

  1. 光电式键盘按键，其特征在于,包括：
    一电路板，用于提供电路连接，电路板上开有一安装孔；
    一光耦组件，设于电路板上，包括置于安装孔侧的一发射元件和一接收元件；
    一按键座，装入安装孔内，其自顶向下开口形成一导引篮，导引篮侧壁上设有供发射元件和接收元件形成光通路的通光槽；
    一按轴，按轴装入导引篮内，可沿导引篮上下滑动；
    一冲锤，竖直置于导引篮内，其上下两端分别通过弹簧与按轴和导引篮连接，其侧面具有与按轴连接的拨块，冲锤上具有光路开关，按轴按下或弹起时通过拨块推动冲锤往复水平转动，用以转动光路开关分别导通或阻断发射元件和接收元件之间的光通路。
  2. 如权利要求1所述的光电式键盘按键，其特征在于：光耦组件设于电路板正面或背面。
  3. 如权利要求1所述的光电式键盘按键，其特征在于：导引篮的底部具有限位台，限位台的顶部具有一对侧挡块，限位台的底部具有供冲锤的底部自由插入的扁孔，冲锤的底部的形状与该扁孔配合。
  4. 如权利要求1所述的光电式键盘按键，其特征在于：所述的按轴内设有供拨块滑行的滑槽，其上部为竖直导槽，其下部为斜向导槽；按轴按下时拨块从斜向导槽滑入竖直导槽，用以推动冲锤单向转动并静止；按轴弹起时拨块从竖直导槽滑入斜向导槽，用以推动冲锤反向转动并静止。
  5. 如权利要求4所述的光电式键盘按键，其特征在于：所述的按轴内设有供冲锤的顶部自由插入的内筒，所述的滑槽位于内筒的侧壁。
  6. 如权利要求4所述的光电式键盘按键，其特征在于：所述的冲锤上具有中心对称设置的两个拨块，所述的按轴内也设有中心对称设置的两个滑槽。
  7. 如权利要求1或2或3或4或5或6所述的光电式键盘按键，其特征在于：所述的发射元件和接收元件分别置于安装孔两侧相对设置，所述的光路开关是水平贯通冲锤的通光孔；按轴按下时通光孔构成发射元件和接收元件的光通路，按轴弹起时通光孔在发射元件和接收元件的光通路上偏转并将其阻断。
  8. 如权利要求7所述的光电式键盘按键，其特征在于：所述的通光孔内设有导光体。
  9. 如权利要求1或2或3或4或5或6所述的光电式键盘按键，其特征在于：所述的发射元件和接收元件分别置于安装孔的同侧，所述的光路开关是设于冲锤上的反光体；按轴按下时反光体通过反射构成发射元件和接收元件的光通路，按轴弹起时反光体偏转并阻断发射元件和接收元件的光通路。
PCT/CN2015/093364 2015-08-31 2015-10-30 光电式键盘按键 WO2017035934A1 (zh)

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