201133293 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種觸控筆，且特別是有關於一種電 容式觸控筆。 【先前技術】 隨著 3C(Computer，Communications and Consumer)產 業的發展，有越來越多的人會使用手持裝置（handheld device)作為生活中的輔助工具。舉例而言，常見的手持裝 置包含個人數位助理(personal digital assistant ; PDA)、行 動電話(mobile phone)、智慧型手機(smart phone)等，這路 手持裝置之體積輕巧，攜帶方便，因此使用的人數越來越 多，所需之功能亦越來越廣。 以 觸控筆(stylus)為一種常見的手持震置操作工耳立 電容式的觸控筆為例，其是使用軟質導電材料&為筆 的材料’由於筆頭材料具有導電性，故在與電容式觸控榮 幕接觸時，藉由觸控榮幕表面電容值的改變，進 ^訊 號的感應。由於電容值與接觸面積成正比，如何 辦 加觸控筆筆頭與觸控勞幕間的接觸面積，而^ 整體體積及其重量，便成為一個重要的課題。 革 【發明内容】 因此本發明的目的就是在提供一種觸控筆，用以 增加觸控筆之尺相前提下，增加觸控筆頭與觸控榮^ 間的接觸面積。 201133293 依照本發明一實施例，提出 導電筆桿以及導電筆頭。導電筆頭配置V導：控筆包含 端，其中導電筆頭為中空結構。導電 2筆桿之- 及與套接部連接之接觸;有 有第-截面厚度’接觸部具有第二截面厚声套接4具 ::度小於第一截面厚度，使接觸部相較ς套接 時產生較大的變形量。 接。卩在受力 接觸部為弧曲形。接觸部實質 形。第二截面厚度較佳地為小於或等形或是圓雜 半。第一截面厚度小於或等於1.5公厘。導曾^厚度的一 可為導電橡膠。導電筆桿之該端具有凸柱，頭之材料 凸柱，接觸部與凸柱之間具㈣隙n部搞接於 至3 0公厘。凸;]丨糸較佳地介於0.5 3.0 ^ &柱可為弧曲形、半球形或 更包含設置於導電料之外表__層，二平 織布，。接觸層厚度較麵為小於鱗於G.l5j 不 部之為ζΛ結構’且接觸部之截面厚度小於套接 二截面尽^彳以使得接觸部更容易在施力時潰縮變 形’以有效地增加接觸部_控螢幕之_接觸面積。 【實施方式】 以下將以圖式及詳細說明清楚說明本發明之精神，任 何所屬技㈣域巾具有通常知财在瞭 :例後，當可由本發明所料之技術，加収變及實 其並不脫離本發明之精神與範圍。 參照第1圖，其係繪示本發明之觸控筆第一實施例的 201133293 剖面圖。觸控筆100包含有導電筆桿110以及導電筆頭 120。導電筆頭120配置於導電筆桿110的一端，導電筆頭 120為中空結構。導電筆頭120包含有套接部122及與其 連接之接觸部124。導電筆桿110之一端具有凸柱112，其 中套接部122為用以耦接於導電筆桿110的凸柱112，接 觸部124則是在書寫時與觸控面板接觸。接觸部124與凸 柱112之間保持有間隙g，導電筆頭120為中空結構，可 以增加接觸部124的形變量，進而增加導電筆頭120與觸 控螢幕之間的接觸面積。 導電筆頭120為中空結構，其材料可為可撓性導電材 料，如導電橡膠或是導電塑膠。套接部122具有第一截面 厚度山，接觸部124具有第二截面厚度d2，其中第二截面 厚度d2小於第一截面厚度d!。換言之，接觸部124的厚度 為小於套接部122的厚度。套接部122與接觸部124之間 較佳地為以弧形連接，即套接部122之厚度向接觸部124 漸減，以避免破壞導電筆頭120的結構強度。前述之接觸 部124的第二截面厚度d2主要是指由套接部122起開始縮 減後穩定之均勻厚度，即接觸部124的末端的厚度。換言 之，第二截面厚度d2實質上是以接觸部124最小的截面厚 度為主。 套接部122的第一截面厚度山與一般的觸控筆筆頭相 同，其厚度小於或是等於1.5公厘。接觸部124的第二截 面厚度d2則是小於套接部122的第一戴面厚度山，其中接 觸部124的第二截面厚度d2較佳地為小於第一截面厚度 山的一半。 201133293 套接部122的第一戴面厚度di未做特別的縮減，故不 影響套接部122耦接於導電筆桿11〇的結構強度。又因為 本案中之接觸部m的第二截面厚纟d2小於套接部122的 第一截面厚度山，因此，接觸部124相較於套接部122在 又力時會產生較大的形變量，使得筆頭潰縮的現象更為明 顯，藉以增加接觸部124與觸控螢幕之間的接觸面積，以 增強訊號強度，可有效提升書寫時的靈敏度，或是避免因 筆頭過小而導致感應不靈敏的情形。 接觸部124之外形為弧曲形，且較佳地為對稱的設計， 以方便使用者在不同操作角度傾斜地使用。本實施例中之 接觸邻124實質上為半球形’凸柱ι12之外形亦可對應於 接觸部124的外形設計為半球形，但不以此為限。凸柱112 與接觸部124的外形較佳地為相互匹配，使得凸柱112與 接觸部124之間的間隙g較為均勻。間隙g較佳地為介於 0.5至3.0公厘。 參照第2圖，其係繪示本發明之觸控筆第二實施例的 剖面圖。觸控筆200中，導電筆頭22〇之接觸部224之外 形實質上可為圓錐形。導電筆頭22〇之接觸部224的第二 戴面厚度屯小於套接部222之第一截面厚度山。接觸部224 與導電筆桿210之凸柱212之間具有間隙g，使得導電筆 頭220之接觸部224形成中空結構。其中凸柱212的形狀 對應於接觸部224為圓錐形，間隙介於〇 5至3.〇公厘。 參照第3圖，其係繪示本發明之觸控筆第三實施例的 剖面圖。觸控筆300除導電筆桿31〇、套接於導電筆桿31〇 之導電筆頭320之外，更包含有設置於導電筆頭32〇之外 201133293 表面上的接觸層330。接觸層330為設置於對應導電筆頭 320之接觸部324的位置，藉以增加書寫時的滑順度。其 中接觸層330之材料可為不織布。接觸層330之厚度較佳 地為小於或等於0.15公厘。 須注意的是，雖然本實施例中之凸柱312與接觸部324 為半球形，但是凸柱312與接觸部324之外形亦可以為弧 曲形、圓錐形等，不以此為限。 由上述本發明較佳實施例可知，應用本發明具有下列 優點。導電筆頭為中空結構，且接觸部之截面厚度小於套 接部之截面厚度，可以使得接觸部更容易在施力時潰縮變 形，以有效地增加接觸部與觸控螢幕之間的接觸面積。 雖然本發明已以一較佳實施例揭露如上，然其並非用 以限定本發明，任何熟習此技藝者，在不脫離本發明之精 神和範圍内，當可作各種之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之詳細說明如下： 第1圖係繪示本發明之觸控筆第一實施例的剖面圖。 第2圖係繪示本發明之觸控筆第二實施例的剖面圖。 第3圖係繪示本發明之觸控筆第三實施例的剖面圖。 【主要元件符號說明】 201133293 100 :觸控筆 224 110 :導電筆桿 300 112 :凸柱 310 120 :導電筆頭 312 122 :套接部 320 124 :接觸部 324 200 :觸控筆 330 210 :導電筆桿 dl : 212 :凸柱 d2 : 220 :導電筆頭 g : 222 :套接部 •接觸部 :觸控筆 :導電筆桿 :凸柱 :導電筆頭 .接觸部 :接觸層 第一截面厚度 第二截面厚度 間隙201133293 VI. Description of the Invention: [Technical Field] The present invention relates to a stylus, and more particularly to a capacitive stylus. [Prior Art] With the development of the 3C (Computer, Communications and Consumer) industry, more and more people use handheld devices as an aid in life. For example, a common handheld device includes a personal digital assistant (PDA), a mobile phone, a smart phone, etc., which is lightweight and portable, and thus is used. The number of people is increasing and the functions required are becoming wider and wider. For example, a stylus is a common hand-held shock-operated ear stylus. It uses a soft conductive material & is a material for the pen. Because the material of the tip is conductive, it is When the capacitive touch screen is touched, the signal is sensed by changing the capacitance value of the surface of the touch screen. Since the capacitance value is proportional to the contact area, how to add the contact area between the stylus pen tip and the touch screen, and the overall volume and weight thereof becomes an important issue. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a stylus for increasing the contact area between a stylus tip and a touch thief under the premise of increasing the stylus of the stylus. 201133293 In accordance with an embodiment of the invention, a conductive sheath and a conductive tip are proposed. The conductive tip is configured with a V-guide: the pen includes a terminal, wherein the conductive tip is a hollow structure. Conductive 2 pen - and contact with the socket; there is a first section thickness 'contact portion has a second section thick sound sleeve 4:: the degree is smaller than the first section thickness, so that the contact portion is more than the socket A large amount of deformation occurs. Pick up. The 接触 is in a curved contact with the force contact. The contact portion is substantially shaped. The thickness of the second section is preferably less than or equal to or equal to a half. The first section thickness is less than or equal to 1.5 mm. One of the thicknesses of the conductive layer can be a conductive rubber. The end of the conductive pen has a stud, a material stud of the head, and a (four) gap between the contact and the stud is connected to 30 mm. The convex;] 丨糸 is preferably between 0.5 3.0 ^ & the column may be curved, hemispherical or more comprising a sheet disposed outside the conductive material, a two-layer woven fabric. The thickness of the contact layer is smaller than that of the scale of G.l5j, and the thickness of the cross section of the contact portion is smaller than that of the sleeve, so that the contact portion is more easily crushed and deformed when applied. Increase the contact area of the contact _ control screen. [Embodiment] The spirit of the present invention will be clearly described in the following drawings and detailed descriptions. Any of the prior art (4) domain towels has the general knowledge: after the example, when the technology can be modified by the present invention, The spirit and scope of the invention are not departed. Referring to Fig. 1, there is shown a cross-sectional view of 201133293 of the first embodiment of the stylus of the present invention. The stylus 100 includes a conductive stylus 110 and a conductive tip 120. The conductive tip 120 is disposed at one end of the conductive pen tip 110, and the conductive pen tip 120 has a hollow structure. The conductive tip 120 includes a socket portion 122 and a contact portion 124 connected thereto. One end of the conductive pen 110 has a stud 112, wherein the socket 122 is a post 112 for coupling to the conductive pen 110, and the contact 124 is in contact with the touch panel during writing. A gap g is maintained between the contact portion 124 and the stud 112. The conductive tip 120 has a hollow structure, which can increase the shape of the contact portion 124, thereby increasing the contact area between the conductive tip 120 and the touch screen. The conductive tip 120 is of a hollow structure and may be made of a flexible conductive material such as conductive rubber or conductive plastic. The socket portion 122 has a first section thickness mountain, and the contact portion 124 has a second section thickness d2, wherein the second section thickness d2 is smaller than the first section thickness d!. In other words, the thickness of the contact portion 124 is smaller than the thickness of the socket portion 122. Preferably, the sleeve portion 122 and the contact portion 124 are connected in an arc shape, that is, the thickness of the socket portion 122 is gradually decreased toward the contact portion 124 to avoid damaging the structural strength of the conductive tip 120. The second section thickness d2 of the aforementioned contact portion 124 mainly refers to a uniform thickness which is stabilized after the sleeve portion 122 starts to be reduced, that is, the thickness of the end portion of the contact portion 124. In other words, the second section thickness d2 is substantially the smallest cross-sectional thickness of the contact portion 124. The first section thickness of the socket portion 122 is the same as that of a general stylus pen tip, and its thickness is less than or equal to 1.5 mm. The second cross-sectional thickness d2 of the contact portion 124 is smaller than the first wearing thickness mountain of the socket portion 122, wherein the second cross-sectional thickness d2 of the contact portion 124 is preferably less than half of the thickness of the first cross-section. The thickness of the first wearing surface di of the socket portion 122 is not particularly reduced, so that the structural strength of the socket portion 122 coupled to the conductive sheath 11 不 is not affected. Moreover, since the second section thickness 纟d2 of the contact portion m in the present case is smaller than the first section thickness mountain of the socket portion 122, the contact portion 124 generates a larger deformation variable when compared with the socket portion 122. Therefore, the phenomenon of the collapsing of the pen is more obvious, so as to increase the contact area between the contact portion 124 and the touch screen to enhance the signal intensity, thereby effectively improving the sensitivity during writing, or avoiding the insensitivity caused by the pen tip being too small. The situation. The outer portion of the contact portion 124 is curved and preferably symmetrical to facilitate the user to use it obliquely at different operating angles. The shape of the contact abutment 124 in the embodiment is substantially hemispherical and the shape of the contact portion 124 may be hemispherical, but not limited thereto. The outer shape of the stud 112 and the contact portion 124 are preferably matched to each other such that the gap g between the stud 112 and the contact portion 124 is relatively uniform. The gap g is preferably from 0.5 to 3.0 mm. Referring to Figure 2, there is shown a cross-sectional view of a second embodiment of the stylus of the present invention. In the stylus 200, the contact portion 224 of the conductive tip 22 can be substantially conical in shape. The second wearing surface thickness 接触 of the contact portion 224 of the conductive pen tip 22 is smaller than the first section thickness mountain of the socket portion 222. The contact portion 224 has a gap g with the stud 212 of the conductive sheath 210 such that the contact portion 224 of the conductive tip 220 forms a hollow structure. The shape of the stud 212 corresponds to the conical shape of the contact portion 224, and the gap is between 〇 5 and 3. mm. Referring to Figure 3, there is shown a cross-sectional view of a third embodiment of the stylus of the present invention. The stylus pen 300 includes a contact layer 330 disposed on the surface of the 201133293 surface of the conductive pen tip 32〇 in addition to the conductive pen holder 31〇 and the conductive pen tip 320 that is sleeved on the conductive pen tip 31〇. The contact layer 330 is disposed at a position of the contact portion 324 of the corresponding conductive tip 320 to increase the smoothness during writing. The material of the contact layer 330 may be a non-woven fabric. The thickness of the contact layer 330 is preferably less than or equal to 0.15 mm. It should be noted that although the protrusion 312 and the contact portion 324 are hemispherical in this embodiment, the shape of the protrusion 312 and the contact portion 324 may be curved, conical, or the like, and is not limited thereto. It will be apparent from the above-described preferred embodiments of the present invention that the application of the present invention has the following advantages. The conductive pen tip has a hollow structure, and the cross-sectional thickness of the contact portion is smaller than the cross-sectional thickness of the sleeve portion, so that the contact portion can be more easily collapsed and deformed when the force is applied, so as to effectively increase the contact area between the contact portion and the touch screen. Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and it is obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; A cross-sectional view of an embodiment. Figure 2 is a cross-sectional view showing a second embodiment of the stylus of the present invention. Figure 3 is a cross-sectional view showing a third embodiment of the stylus of the present invention. [Main component symbol description] 201133293 100 : stylus 224 110 : conductive pen holder 300 112 : stud 310 120 : conductive pen tip 312 122 : socket portion 320 124 : contact portion 324 200 : stylus 330 210 : conductive pen dl : 212 : Columbine d2 : 220 : Conductive pen tip g : 222 : Socket part • Contact part : stylus pen : Conductive pen holder : Stud: Conductive pen tip. Contact: Contact layer first section thickness Second section thickness gap