201036019 六、發明說明： 【發明所屬之技術領域】 ' 本發明涉及一種按鍵結構。 【先前技術】 先前之大多數按鍵結構藉由在鍵帽下設置突出之觸 壓桿，以在按鍵被按壓時觸壓設置在按鍵下方之電性接觸 點從而識別被按壓之按鍵。惟係，此種按鍵結構需要藉由 ® 直接觸碰來識別被按壓之按鍵，容易造成部件之磨損從而 減低按鍵之使用壽命。 【發明内容】 有鑒於此，有必要提供一種採用非接觸方式來識别被 按壓按鍵之按鍵結構。201036019 VI. Description of the invention: [Technical field to which the invention pertains] ' The present invention relates to a button structure. [Prior Art] Most of the previous button structures recognize the pressed button by setting a protruding contact lever under the keycap to press the electrical contact point disposed under the button when the button is pressed. However, this type of button structure needs to recognize the pressed button by direct touch, which is easy to cause wear of the component and reduce the service life of the button. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a key structure that recognizes a pressed button in a non-contact manner.
一種按鍵結構，其包括鍵帽、彈性元件、固定板及感 應電路板。所述鍵帽藉由彈性元件與所述固定板連接。所 述感應電路板設置在固定板與彈性元件連接端相對之另一 側。所述鍵帽與感應電路板相對之一端設置有磁性元件。 所述感應電路板上對應每一個鍵帽排佈有一感應線圈。在 鍵帽被按壓時，與被按壓鍵帽相對之感應線圈產生感應電 動勢以識別被按壓鍵帽。 相較於先前技術，本發明所提供之按鍵結構藉由在鍵 帽上§又置磁性元件’並在與鍵帽對應之感應電路板上設置 3 201036019 感應線圈，以利用電磁感應定律在與被按壓鍵帽對應之感 應線圈内產生感應電動勢’從而採用非接觸之方式識別被 按壓之鍵帽。 【實施方式】 下面將結合附圖對本發明作一具體介紹。 如圖1所示’本發明第一實施方式所提供之按鍵結構 2包括鍵帽20、磁性元件206、彈性元件22、固定板24 〇 及感應電路板26。所述鍵帽20 ||•由彈性元件22與所述 固定板24連接。所述感應電路板26設置在固定板24與 彈性元件22連接端相對之另一侧。 所述感應電路板26對應每一個鍵帽20上之磁性元件 206所在之位置排佈有感應線圈260。所述感應線圈26〇 之材料為導電金屬材料，如：金、銀、銅、鋁、鎳及其組 合物。 如圖2所示’所述彈性元件22包括第一彈性臂220a ❹ 及苐一彈性臂220b。所述第一彈性臂220a及第二彈性臂 220b交又連接形成一個剪刀形升降結構。所述彈性元件 22 s免置在所述鍵帽20與固定板24之間將所述鍵帽2〇彈 性支撐在所述固定板24上。 所述鍵帽20包括按壓面200及與所述按壓面2〇〇相 對之連接面202。所述連接面202上對應所述彈性元件22 之第一彈性臂220a及第二彈性臂220b分別設置有第一連 接結構204用以與所述彈性元件22相連接。 所述鍵帽20之連接面202上開設有容置凹槽205。 4 201036019 所述容置凹槽205用於放置所述磁性元件206 (請參見圖 1所示）。 ' 如圖3所示，所述固定板24上對應每一個彈性元件 : 22設置有第二連接結構242用以與所述彈性元件22相連 接0 所述固定板24對應每一個鍵帽2〇上之磁性元件206 所處之位置開設有感應通孔244。所述固定板24之材料 為非導磁性材料，以減少所述固定板24對磁性元件206 ® 所產生之磁場分佈之影響。 如圖1所示，當所述鍵帽20被按壓時，所述鍵帽20 受到按壓力向下運動並擠壓與鍵帽20活動連接之彈性元 件22。所述彈性元件22在鍵帽20之擠壓下發生彈性形 變從而產生彈性回復力以平衡鍵帽20所受到之按壓力。 當按壓力消除後，所述鍵帽20在彈性元件22之彈性回復 力之作用下上升恢復至沒有被按壓時所處之位置。 可以理解的係，所述彈性元件22不限於第一實施方 式所提供之剪刀形升降結構’還可以為一用於連接所述鍵 帽20和固定板24之彈簧或其他可彈性升降結構。 在上述鍵帽20被按壓向下運動和上升恢復之過程 中，設置在鍵帽20之連接面202上之磁性元件206也跟 隨鍵帽20在垂直方向上運動。因此，所述磁性元件2〇6 在與所述鍵帽20對應設置之感應線圈26〇處所產生之磁 場強度也發生變化。根據電磁感應定律，所述感應線圈 260内產生與所述磁性元件206在感應線圈260處所產生 之磁場強度變化率成正比之感應電動勢。藉由檢測感應電 5 201036019 路板26上感應線圈260之感應電動勢便可識別與感應線 圈260所對應之鍵帽20是否被按壓。 ' 可以理解的係，所述鍵帽20上之磁性元件206可被 * 設置為具有各不相同之磁極分佈和磁通量密度。在相同按 壓力度下’不同鍵帽20所對應之感應線圈260内將產生 不同之感應電動勢。因此，每一個鍵帽20均有與其對應 之特定感應電動勢以直接識別被按壓之鍵帽2〇所代表之 輸入資訊’而不需要先識別被按壓鍵帽20在鍵盤中之位 ® 置，再藉由對應之介面程式確定被按壓鍵帽20所代表之 輸入資訊。因此，即使改變鍵帽2〇在鍵盤上之排列位置 也不需要重新編寫新之介面程式。 可以理解的係，因按壓鍵帽20之力度不盡相同，所 述不同鍵帽20所對應的為一感應電動勢範圍而不係唯一 確定之感應電動勢值。 如圖4所示，本發明第二實施方式所提供之按鍵結構 ❹4與第一實施方式所提供之按鍵結構2基本相同，其不同 之處在於·所述按鍵結構4之感應電路板46藉由充電電 路48與充電電池E或供電電路49相連。 所述充電電路48可以為二極體整流電路，如：單個 或多個二極體組成之橋式整流電路。因此，感應電路板 46上之感應線圈460内產生之感應電動勢除了用於識別 對應鍵巾i 40之按壓狀態外還可以經過整流、穩壓、充電 等處理後為按鍵結構4自身或其他外部設備提供電能。 可以理解的係，為了增大所述感應線圈460所產生之 感應電動勢，所述感應線圈460之材料為具有超導特性之 201036019 材料如.、銳、欽、錯、钮及其組合物。 r上前技術’本發明所提供之按鍵結構藉由在鍵 '凡件’亚在與鍵帽對應之感應電路板上設置 應:圖内/利用電磁感應定律在與被按壓鍵帽對應之感 按壓之鍵帽生動勢’從㈣用非關之方式識別被 ❹ 方式=Τ = ; =術=當認識到’以上之實施 —，兄月本發明，而並非用作為對本發明之限 2作：、翁•本發明之實質精神範圍之内’對以上實施方式 I备改變和變化都落在本發明要求保護之範圍之 内0 【圖式簡單說明】 圖1為本發明第-實施方式提供之按鍵結構之分解示 意圖。 圖2為圖1中彈性元件與鍵帽之連接示意圖。 圖3為圖1 t彈性元件與固定板之連接示意圖。 圖4為本發明第二實齡式提供之按鍵結構之分解示 【主要元件符號說明】 按鍵結構 2、4 鍵帽 彈性元件 22 固定板 7 201036019 感應電路板 26、46 磁性元件 206 感應線圈 260、460 第一彈性臂 220a 第二彈性臂 220b 按壓面 200 連接面 202 第一連接結構204 容置凹槽 205 第二連接結構242 感應通孔 244 充電電路 48 供電電路 49A button structure includes a keycap, an elastic member, a fixing plate, and an inductive circuit board. The key cap is coupled to the fixing plate by an elastic member. The sensing circuit board is disposed on the other side of the fixing plate opposite to the connecting end of the elastic member. The key cap is provided with a magnetic element at one end opposite to the sensing circuit board. An induction coil is arranged on each of the keycaps on the sensing circuit board. When the keycap is pressed, the induction coil opposite the pressed keycap generates an induced electromotive force to identify the pressed keycap. Compared with the prior art, the button structure provided by the present invention uses the magnetic element of the key cap and the 3 201036019 induction coil on the sensing circuit board corresponding to the key cap to utilize the law of electromagnetic induction. The induction electromotive force is generated in the induction coil corresponding to the keycap to identify the pressed keycap in a non-contact manner. [Embodiment] Hereinafter, the present invention will be specifically described with reference to the accompanying drawings. As shown in Fig. 1, the key structure 2 provided by the first embodiment of the present invention includes a keycap 20, a magnetic member 206, an elastic member 22, a fixing plate 24, and an inductive circuit board 26. The key cap 20 || is connected to the fixing plate 24 by a resilient member 22. The sensing circuit board 26 is disposed on the other side of the fixing plate 24 opposite to the connecting end of the elastic member 22. The sensing circuit board 26 is arranged with an induction coil 260 corresponding to the position of the magnetic component 206 on each of the keycaps 20. The material of the induction coil 26 is a conductive metal material such as gold, silver, copper, aluminum, nickel and a combination thereof. As shown in Fig. 2, the elastic member 22 includes a first elastic arm 220a and a resilient arm 220b. The first elastic arm 220a and the second elastic arm 220b are connected to each other to form a scissor-shaped lifting structure. The elastic member 22 s is elastically supported on the fixing plate 24 between the keycap 20 and the fixing plate 24 . The keycap 20 includes a pressing surface 200 and a connecting surface 202 opposite to the pressing surface 2'. The first elastic arm 220a and the second elastic arm 220b of the connecting surface 202 corresponding to the elastic member 22 are respectively provided with a first connecting structure 204 for connecting with the elastic member 22. An accommodating recess 205 is defined in the connecting surface 202 of the key cap 20 . 4 201036019 The accommodating recess 205 is for placing the magnetic element 206 (see FIG. 1). As shown in FIG. 3, the fixing plate 24 corresponds to each of the elastic members: 22 is provided with a second connecting structure 242 for connecting with the elastic member 22. The fixing plate 24 corresponds to each of the keycaps 2 An inductive through hole 244 is defined at a position where the upper magnetic member 206 is located. The material of the fixing plate 24 is a non-magnetic material to reduce the influence of the fixing plate 24 on the magnetic field distribution generated by the magnetic member 206 ® . As shown in Fig. 1, when the keycap 20 is pressed, the keycap 20 is moved downward by a pressing force and presses the elastic member 22 movably coupled to the keycap 20. The elastic member 22 is elastically deformed by the pressing of the keycap 20 to generate an elastic restoring force to balance the pressing force received by the keycap 20. When the pressing force is removed, the keycap 20 rises under the elastic restoring force of the elastic member 22 to return to a position where it is not pressed. It is to be understood that the elastic member 22 is not limited to the scissors-shaped lifting structure provided by the first embodiment. It may also be a spring or other elastic lifting structure for connecting the keycap 20 and the fixing plate 24. During the pressing of the keycap 20 described above, the magnetic member 206 disposed on the connecting surface 202 of the keycap 20 also moves in the vertical direction with the keycap 20. Therefore, the magnetic field strength generated by the magnetic element 2〇6 at the induction coil 26〇 provided corresponding to the keycap 20 also changes. According to the law of electromagnetic induction, an induced electromotive force is generated in the induction coil 260 in proportion to a rate of change in the strength of the magnetic field generated by the magnetic element 206 at the induction coil 260. By detecting the induced electromotive force of the induction coil 260 on the road board 26, it is possible to identify whether the key cap 20 corresponding to the induction coil 260 is pressed. It will be understood that the magnetic elements 206 on the keycap 20 can be arranged to have different magnetic pole distributions and magnetic flux densities. Different induced electromotive forces will be generated in the induction coil 260 corresponding to the different keycaps 20 under the same pressing force. Therefore, each of the keycaps 20 has a specific induced electromotive force corresponding thereto to directly recognize the input information represented by the pressed keycap 2' without first identifying the position of the pressed keycap 20 in the keyboard, and then The input information represented by the pressed keycap 20 is determined by the corresponding interface program. Therefore, even if the position of the keycap 2 on the keyboard is changed, there is no need to rewrite the new interface program. It can be understood that since the strength of pressing the keycap 20 is not the same, the different keycaps 20 correspond to an induced electromotive force range and are not uniquely determined. As shown in FIG. 4, the button structure ❹4 provided by the second embodiment of the present invention is substantially the same as the button structure 2 provided by the first embodiment, except that the sensing circuit board 46 of the button structure 4 is used by The charging circuit 48 is connected to the rechargeable battery E or the power supply circuit 49. The charging circuit 48 can be a diode rectifying circuit, such as a bridge rectifier circuit composed of a single or a plurality of diodes. Therefore, the induced electromotive force generated in the induction coil 460 on the sensing circuit board 46 can be subjected to rectification, voltage stabilization, charging, etc., in addition to the pressing state of the corresponding key towel i 40, and is the key structure 4 itself or other external device. Provide electrical energy. It can be understood that in order to increase the induced electromotive force generated by the induction coil 460, the material of the induction coil 460 is superconducting material 201036019 materials such as ., sharp, chin, wrong, button and combinations thereof. r The above-mentioned technology 'The key structure provided by the present invention is set on the sensing circuit board corresponding to the key cap in the key 'any piece': the inside of the figure / the feeling of corresponding to the pressed key cap by the law of electromagnetic induction Pressing the keycap vividly 'from (4) identifying the bedding in a non-off manner. Τ = Τ = ; = surgery = when recognizing 'the above implementation', the invention is not used as a limitation to the invention 2: And the present invention is within the scope of the spirit of the invention. The changes and variations of the above embodiments are within the scope of the claimed invention. [FIG. 1 is a first embodiment of the present invention. An exploded view of the button structure. 2 is a schematic view showing the connection of the elastic member and the key cap of FIG. 1. Figure 3 is a schematic view showing the connection of the elastic member of Figure 1 and the fixed plate. 4 is an exploded view of a button structure provided by a second age type according to the present invention. [Key element symbol description] Key structure 2, 4 Key cap elastic element 22 Fixing plate 7 201036019 Induction circuit board 26, 46 Magnetic element 206 Induction coil 260, 460 first elastic arm 220a second elastic arm 220b pressing surface 200 connecting surface 202 first connecting structure 204 receiving groove 205 second connecting structure 242 sensing through hole 244 charging circuit 48 power supply circuit 49