201040798 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種無線筆與輸入裝置，特別是有關 於一種具有調整結構的無線筆與輸入裝置。 【先前技術】 電磁式的手寫輸入裝置，例如：數位板（digital Tablet)或電磁式電子白板（digital whiteboard)的產 品組合，通常包含一枝電磁式的無線筆與一個數位板裝 置。數位板一般包含感應天線迴路與包含類比數位轉換 器、放大器、處理器或控制1C的印刷電路板，用於感應處 理電磁筆發射的電磁波訊號。電磁筆一般係使用由電容與 電感（LC)所構成的電路，利用電磁筆在數位板的接觸力 量變化改變電容或電感與發射頻率，以將電磁筆筆尖壓力 以筆劃線條粗細的方式顯示在顯示裝置上。當電磁筆發射 電磁波時，數位板的感應天線迴路接收該電磁波，並將電 磁筆的位置、按鍵狀態、頻率變化等，輸出至個人電腦等 主機，並由軟體計算顯示在勞幕等顯示裝置上。 電磁筆一般分為有電池電磁筆與無電池電磁筆。在無 電池電磁筆方面，當利用電磁筆或無線筆筆尖與數位板之 201040798 間接觸力量變化造成電磁筆或無線筆筆芯移動，筆芯帶動 鐵心在線圈内移動同時對筆内彈性物質例如橡膠施力產生 形變以及相關零件移動以改變電感、電容與電磁訊號的頻 率，此種電磁筆可見於美國專利US5,565,632專利及us 6, 853, 369 B2。 關於US5, 565, 632專利，其基本理念是想經由前置式 〇 的小鐵心在纏繞有線圈的大鐵心之前，作相對性的位移以 改變電感值，當電感值改變時振篕頻率也跟著改變。不過 其設計的方式卻有明顯的缺點。此缺點正是源自前置的小 鐵心在線圈前端移動時，不僅會使共振電磁訊號的振幅會 隨之變化而導致計算出的座標有抖動現象，更會使磁力線 的分佈狀態不同而導致筆傾斜的角度有失真的問題。設計 上也缺乏一個彈性的調整結構在内，以將可能存在的頻率 〇 偏差調整回來。 關於US 6, 853, 369 B2專利，其基本理念是設計出一 個靈敏的可隨筆芯施力輕重而改變的可變電容器，I依可 變電容的電容值來改變振盪頻率。不過，其設計上的優點 也正好是其缺點，因為此可變電容器的二極材質（如同一 平行電板）不論是金屬材質或是導電橡膠材質，當此平行 電板靠近線圈時，便會直接影響磁力線的分佈，如同一金 5 201040798 屬遮罩般的破壞線圈發出的封閉磁力線的完整性，而導致 訊號減弱，並影響磁場強弱分佈狀態，導致筆傾斜的角度 有失真的問題。同時，為使可變電容器對輕量的施壓敏感， 其就無法承受較重的力道，當過度力導施加於筆芯時，便 會導致可變電容器發生故障。更糟糕的是，此可變電容器 結構，如果有製造上無可避免的長度或高度上的公差存在 時，便會導致振盪頻率不準確，設計上也缺乏一個補救性 的調整結構在内以將頻率調整回來。 鑑於上述傳統無線筆或電磁筆的缺點，本發明提出一 種改良的具調整結構的無線筆，以解決傳統無線筆設計上 的缺陷。 【發明内容】 本發明的一目的在於提出一種具調整結構的無線電磁 筆，利用二段式可變電感與包含可伸縮件的調整部隨無線 筆接觸力調整電感，以改變無線筆發射的電磁波頻率。此可 變電感中的可移動的小鐵心，位於纏繞有線圈的鐵心的後 端，以避免電磁振盪訊號振幅，隨著筆芯帶動的小鐵心作 變化。 6 201040798 本發明的另一目的在於提出一種可調整無電池無線 筆，利用無線筆内包含可伸縮件與調整元件的調整部，避免 傳統電磁筆因本身内部零件的尺寸公差，造成頻率偏差的 問題。 本發明的另一目的在於提出一調整元件，該調整元件 固定於該無線筆内，該調整元件與該無線筆筆芯分別對該可 0 伸縮件兩端施加作用力。 根據上述的目的，本發明揭露一種包含此無線筆的輸 入裝置。此輸入裝置具有感應天線迴路的數位板及一無線 筆。無線筆包含一可變電感、一調整部與一電路。可變電感 包含第一鐵心、第二鐵心與纏繞第一鐵心的線圈，可變電 感透過該第一鐵心之該第二鐵心間距變化改變電感值。調 〇 整部包含可伸縮件並隨來自無線筆筆芯接觸力伸縮以改變第 一鐵心之第二鐵心間距。電路連接可變電感形成共振電路 以感應接受電磁波訊號，經共振之後發射回該數位板，數 位板再經算後輸出座標、按鍵狀態等資訊給電腦。 【實施方式】 本發明的一些實施例將詳細描述如下。然而，除了如 7 201040798 下描述外，本發明還可以廣泛地在其他的實施例施行，且 本發明的範圍並不受實施例之限定，其以之後的專利範圍 為準。再者，為提供更清楚的描述及更易理解本發明，圖 式内各部分並沒有依照其相對尺寸繪圖，某些尺寸與其他 相關尺度相比已經被誇張；不相關之細節部分也未完全綠 出，以求圖式的簡潔。 第一圖顯示本發明無線筆之一實施例。本發明此實施例 之無線筆100包含外殼101、電路102、調整部104、第一鐵 心（Ferrite Core) 106、第二鐵心 108、線圈 11〇與筆芯 112， 可搭配包含感應天線迴路的數位板（Digital Tablet)使 用。其中由第一鐵心106、第二鐵心1〇8與線圈110組成的可 變電感與電路102連接形成共振電路以感應接受電磁波訊 號，經共振之後發射回數位板，因此搭配數位板使用時不 需使用電池。由第一鐵心106、第二鐵心108與線圈110組成 的電感值可由調整部104控制第一鐵心106、第二鐵心108 的間距達成’在本實施例中，線圈11〇纏繞第一鐵心106， 但不限於此❶調整部104改變第一鐵心1〇6、第二鐵心108 的間距係根據筆芯Π2接觸數位板受力的程度，即當筆芯 112 —端接觸數位板受力時’筆芯112的另一端將力量傳遞 至调整部104使第一鐵心106、第二鐵心1〇8的間距改變，遠 成變化電感值、電磁波訊號頻率的結果，因此無線筆筆尖 201040798 壓力大小即以筆劃線條粗細的方式透過電腦顯示在螢幕等 顯示裝置上。 第二圖顯示第一圖中無線筆之調整部、第一與第二鐵 心、線圈的一實施例。於外殼101内’筆芯112穿過第一鐵心 106、第二鐵心108,筆芯II2一端露出於無線筆外殼1〇1外， 用於接觸數位板（未圖示）以指向、輸入座標特別是書寫 ❹ 輸入。筆芯112的另一端則接觸調整部104，以將筆芯112 一端的接觸力量傳遞至調整部。在本發明一實施例中， 調整部104包含調整元件114、彈性材質116、可伸縮件Π8、 可伸縮件罩120、筆芯座122。可伸縮件118包含彈簧，但不 限於彈簧，必須具有即時形變復原的特性。可伸縮件罩120 包含彈簧罩，彈性材質116包含橡膠或其他彈性物質，調整 元件114包含螺絲以及位於無線筆内的螺紋，但不限於此。 〇 第一鐵心106與第二鐵心108之間則由墊片124隔開。在一實 施例中，線圈係纏繞於第一鐵心106，且第一鐵心106比第 二鐵心108長，但不限於此。當筆芯112—端接觸受力時， 力量傳遞至筆芯112的另一端之筆芯座122,筆芯座122則將 力量傳遞至可伸縮件118與可伸縮件罩120，固定於無線筆 内的調整元件114則透過彈性材質116施加反作用力於可伸 縮件118，此時可伸縮件118受到雙向擠壓變形收縮，而與 筆芯座122接觸的第二鐵心108則因筆芯112將筆芯座122頂 9 201040798 向固定於無線筆内的調整元件114而拉大與第一鐵心106之 間的間距，因而達成改變電感值、電磁波訊號頻率的結果。 此外’當無線筆在數位板上使用時，筆芯112可能經輕壓至 重壓等不同程度連續或不連續的施力，甚至書寫時的傾斜 姿態，均可能造成第一鐵心106與第二鐵心108之間距未有 效反應實際使用狀態，產生施力與訊號輸出不完全一致即 所謂「漏水」的問題。可伸縮件Π8的即時形變復原特性可 避免第一鐵心106與第二鐵心108的間距變化未能跟上實際 使用狀態的問題。 調整元件114係用於無線筆出廠時針對第一鐵心 與第二鐵心108間距意即無線筆電感值、電磁波訊號頻率的 設定。當筆芯112書寫端未受力時，調整元件U4可調整可 伸縮件118所受壓力，以設定無線筆電感值、電磁波訊號頻 率出廠設定值。調整元件1丨4以壓力調整螺絲而可伸縮件 118以彈簧為例，無線筆出廠前’利用螺絲旋向或旋離彈 簧，可調整彈簧受壓縮的稃度以及第一鐵心1 〇6、第二鐵心 108與線圈110組成的電感值。無線筆出廠前必須設定輸出 訊號產生書寫效果所需施加的力量’也就是所謂「出水」 所需施加的力量，此設定係透過調整元件114進行設定。 201040798 本發明之無電池無線筆利用二段式可變電感與包含可 伸縮件的調整部，可隨無線筆接觸力調整電感以改變無線筆 發射電磁波頻率。同時利用無線筆内包含可伸縮件與調整元 件的調整部，可有效避免傳統電磁筆因書寫傾斜姿態、不 同程度連續或不連續的施力造成零件延遲反應、各零件間 距未有效反應實際使用狀態等所產生施力與訊號輸出不完 全一致，所造成的「漏水」問題。 Ο 上述之實施例僅係為說明本發明之技術思想及特點， 其目的在使熟悉此技藝之人士能了解本發明之内容並據以 實施’當不能以之限定本發明之專利範圍，即凡其他未脫 離本發明所揭示精神所完成之各種等效改變威修飾都涵蓋 在本發明所揭露的範圍内，均應包含在下述之申請專利範 圍内。 〇 【圖式簡單說明】 第圓顯示本發明無線筆之一實施例。 第一圖顯示第一圖中無線筆之調整部、第〆與第一鐵心、 線圈的一實施例。 11 201040798 【主要元件符號說明】 100無線筆 101外殼 102 電路 104調整部 106第一鐵心 108第二鐵心 110線圈 112筆芯 114調整元件 116彈性材質 118可伸縮件 120可伸縮件罩 122筆芯座 124墊片201040798 VI. Description of the Invention: [Technical Field] The present invention relates to a wireless pen and input device, and more particularly to a wireless pen and input device having an adjustment structure. [Prior Art] An electromagnetic handwriting input device, such as a digital tablet or a digital whiteboard product combination, usually includes an electromagnetic wireless pen and a tablet device. The tablet typically includes an inductive antenna loop and a printed circuit board containing an analog digital converter, amplifier, processor or control 1C for sensing the electromagnetic wave signals emitted by the electromagnetic pen. Electromagnetic pens generally use a circuit composed of a capacitor and an inductor (LC). The contact force of the electromagnetic pen on the tablet changes the capacitance or inductance and the emission frequency, so that the pen tip pressure is displayed in the thickness of the pen line. On the device. When the electromagnetic pen emits electromagnetic waves, the sensing antenna loop of the tablet receives the electromagnetic wave, and outputs the position of the electromagnetic pen, the state of the button, the frequency change, etc. to a host computer such as a personal computer, and is displayed by the software on the display device such as a curtain. . Electromagnetic pens are generally divided into battery electromagnetic pens and batteryless electromagnetic pens. In the case of a batteryless electromagnetic pen, when the contact force between the electromagnetic pen or the wireless pen tip and the digital tablet 201040798 causes the electromagnetic pen or the wireless pen refill to move, the pen core drives the iron core to move inside the coil while the elastic material such as rubber in the pen is applied. The force is applied to the deformation and the movement of the associated parts to change the frequency of the inductance, capacitance and electromagnetic signals. Such an electromagnetic pen can be found in U.S. Patent No. 5,565,632 and US 6,853,369 B2. With regard to the US5, 565, 632 patent, the basic idea is to make a relative displacement to change the inductance value before the large iron core wound with the coil through the small core of the front-mounted cymbal, and the vibration frequency also follows when the inductance value changes. change. However, the way it is designed has obvious drawbacks. This shortcoming is caused by the fact that when the small iron core of the front moves at the front end of the coil, not only the amplitude of the resonant electromagnetic signal will change, but also the calculated coordinate has a jitter phenomenon, and the distribution state of the magnetic force line is different, resulting in a pen. The angle of the tilt has a problem of distortion. There is also a lack of a flexible adjustment structure in the design to adjust for possible frequency 〇 deviations. With regard to the US 6, 853, 369 B2 patent, the basic idea is to design a sensitive variable capacitor that can be changed with the force of the pen core. I change the oscillation frequency according to the capacitance of the variable capacitor. However, its design advantages are also its shortcomings, because the two-pole material of the variable capacitor (such as the same parallel electric plate) is made of metal or conductive rubber. When the parallel plate is close to the coil, it will It directly affects the distribution of magnetic lines of force, such as the integrity of the closed magnetic lines of the mask-like breaking coil of the same gold 5 201040798, which causes the signal to weaken and affect the distribution of the magnetic field strength, resulting in distortion of the angle of the pen tilt. At the same time, in order to make the variable capacitor sensitive to light pressure, it cannot withstand a heavier force. When an excessive force is applied to the refill, the variable capacitor may malfunction. To make matters worse, this variable capacitor structure, if there is an inevitable length or height tolerance in manufacturing, will result in inaccurate oscillation frequency, and the design also lacks a remedial adjustment structure. The frequency is adjusted back. In view of the above disadvantages of the conventional wireless pen or electromagnetic pen, the present invention proposes an improved wireless pen with an adjustment structure to solve the drawbacks of the conventional wireless pen design. SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless electromagnetic pen with an adjustment structure, which utilizes a two-stage variable inductor and an adjustment portion including a retractable member to adjust an inductance with a wireless pen contact force to change a wireless pen emission. Electromagnetic wave frequency. The movable small core in the variable inductance is located at the rear end of the core wound with the coil to avoid the amplitude of the electromagnetic oscillation signal, which changes with the small core driven by the refill. 6 201040798 Another object of the present invention is to provide an adjustable batteryless wireless pen that utilizes an adjustment portion including a telescopic member and an adjustment member in the wireless pen to avoid the problem of frequency deviation caused by the dimensional tolerance of the internal electromagnetic component of the conventional electromagnetic pen. . Another object of the present invention is to provide an adjustment component that is secured within the wireless pen, the adjustment component and the wireless pen cartridge respectively applying a force to both ends of the zero telescoping member. In accordance with the above objects, the present invention discloses an input device incorporating such a wireless pen. The input device has a tablet that senses the antenna loop and a wireless pen. The wireless pen includes a variable inductor, an adjustment portion, and a circuit. The variable inductor includes a first core, a second core and a coil wound around the first core, and the variable inductance changes the inductance value through the second core pitch change of the first core. The entire part contains the retractable member and is stretched with the contact force from the wireless pen refill to change the second core pitch of the first core. The circuit is connected with a variable inductor to form a resonant circuit to sense and receive the electromagnetic wave signal. After being resonated, it is transmitted back to the digital board, and the digital board outputs the coordinates, button status and other information to the computer after calculation. [Embodiment] Some embodiments of the present invention will be described in detail below. However, the present invention can be widely practiced in other embodiments, and the scope of the present invention is not limited by the examples, which are subject to the scope of the following patents. Further, in order to provide a clearer description and a better understanding of the present invention, the various parts of the drawings are not drawn according to their relative dimensions, and some dimensions have been exaggerated compared to other related dimensions; the unrelated details are not completely green. Out, in order to make the schema simple. The first figure shows an embodiment of the wireless pen of the present invention. The wireless pen 100 of this embodiment of the present invention comprises a housing 101, a circuit 102, an adjustment unit 104, a first core (Ferrite Core) 106, a second core 108, a coil 11A and a refill 112, which can be combined with a digital unit including an inductive antenna loop. Used by the Digital Tablet. The variable inductance composed of the first core 106, the second core 1〇8 and the coil 110 is connected with the circuit 102 to form a resonant circuit to sense and receive the electromagnetic wave signal, and is transmitted back to the tablet after resonance, so that the tablet is not used when used. A battery is required. The inductance value of the first core 106, the second core 108 and the coil 110 can be controlled by the adjusting portion 104 to achieve the pitch of the first core 106 and the second core 108. In the embodiment, the coil 11 is wound around the first core 106. However, the present invention is not limited to the adjustment unit 104 changing the distance between the first core 1〇6 and the second core 108 according to the degree to which the refills 2 are in contact with the tablet, that is, when the refill 112 is in contact with the tablet. The other end of the core 112 transmits the force to the adjusting portion 104 to change the pitch of the first core 106 and the second core 1〇8, which is a result of changing the inductance value and the electromagnetic signal frequency. Therefore, the pressure of the wireless pen tip 201040798 is stroked. The line thickness is displayed on a display device such as a screen through a computer. The second figure shows an embodiment of the adjustment unit of the wireless pen, the first and second cores, and the coil in the first figure. In the outer casing 101, the refill 112 passes through the first core 106 and the second core 108, and one end of the refill II2 is exposed outside the wireless pen housing 1〇1 for contacting the digital board (not shown) for pointing and inputting the coordinates. It is a writing ❹ input. The other end of the refill 112 contacts the adjustment portion 104 to transmit the contact force at one end of the refill 112 to the adjustment portion. In an embodiment of the invention, the adjustment portion 104 includes an adjustment member 114, an elastic material 116, a retractable member Π8, a retractable member cover 120, and a refill holder 122. The telescopic member 118 includes a spring, but is not limited to a spring, and must have a property of immediate deformation recovery. The retractable cover 120 includes a spring cover, the resilient material 116 includes rubber or other resilient material, and the adjustment member 114 includes screws and threads within the wireless pen, but is not limited thereto.之间 The first core 106 and the second core 108 are separated by a spacer 124. In one embodiment, the coil is wound around the first core 106, and the first core 106 is longer than the second core 108, but is not limited thereto. When the refill 112 is in contact with the force, the force is transmitted to the refill seat 122 at the other end of the refill 112, and the refill seat 122 transmits the force to the retractable member 118 and the retractable cover 120, and is fixed to the wireless pen. The inner adjusting member 114 applies a reaction force to the telescopic member 118 through the elastic material 116. At this time, the telescopic member 118 is subjected to biaxial compression deformation and contraction, and the second core 108 contacting the refill base 122 is caused by the refill 112. The refill base 122 top 9 201040798 enlarges the distance between the upper core 110 and the adjustment element 114 fixed in the wireless pen, thereby achieving a result of changing the inductance value and the electromagnetic wave signal frequency. In addition, when the wireless pen is used on the tablet, the refill 112 may be subjected to different degrees of continuous or discontinuous force application, such as heavy pressure, or even a tilting posture during writing, which may cause the first core 106 and the second core. The distance between the cores 108 is not effectively reacted to the actual use state, and the problem that the force application and the signal output do not completely coincide with each other is called "water leakage". The immediate deformation recovery characteristic of the retractable member 8 prevents the problem that the change in the pitch between the first core 106 and the second core 108 fails to keep up with the actual use state. The adjusting component 114 is used for setting the distance between the first core and the second core 108, that is, the wireless pen inductance value and the electromagnetic wave signal frequency when the wireless pen is shipped. When the writing end of the refill 112 is not stressed, the adjusting component U4 can adjust the pressure of the telescopic member 118 to set the wireless pen inductance value and the electromagnetic wave signal frequency setting value. The adjusting element 1丨4 is a pressure adjusting screw and the retractable member 118 is a spring. For example, the wireless pen is rotated or rotated away from the spring by the screw to adjust the compression degree of the spring and the first core 1 〇6, The inductance value of the two cores 108 and the coil 110. Before the wireless pen is shipped from the factory, it is necessary to set the force required to output the signal to produce the writing effect, which is the force required to be applied to the so-called "water outlet". This setting is set by the adjusting element 114. 201040798 The batteryless wireless pen of the present invention utilizes a two-stage variable inductor and an adjustment portion including a telescopic member to adjust the inductance with the wireless pen contact force to change the frequency of the electromagnetic wave emitted by the wireless pen. At the same time, the adjustment part including the retractable member and the adjusting component in the wireless pen can effectively avoid the delayed reaction of the traditional electromagnetic pen due to the writing inclined posture, the continuous or discontinuous force applied to different degrees, and the interval of each component is not effectively reacted to the actual use state. The "leakage" problem caused by the force applied and the signal output are not completely identical. The above embodiments are merely illustrative of the technical spirit and characteristics of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the invention as it is not limited thereto. All other equivalent modifications, which are made without departing from the spirit of the invention, are intended to be included within the scope of the invention. 〇 [Simplified description of the drawings] The first circle shows an embodiment of the wireless pen of the present invention. The first figure shows an embodiment of the adjustment unit of the wireless pen, the third and the first core, and the coil in the first figure. 11 201040798 [Main component symbol description] 100 wireless pen 101 housing 102 circuit 104 adjustment portion 106 first core 108 second core 110 coil 112 refill 114 adjustment element 116 elastic material 118 retractable member 120 retractable cover 122 refill seat 124 gasket