201117057 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種觸控筆，特別涉及一種可以投射光束的 觸控筆。 [0002] [先前技術] 現有一種光學觸控技術’該技術係在觸控屏下面安裝光 感測元件，再利用一種筆尖能夠發光的觸控筆在觸控屏 上進行操作，通過光感測元件感測發光的筆尖在觸控屏 〇 [0003] 上的位置實現觸控動作的辨識。 這種觸控筆的筆尖内一般採用紅外線發光二極體作為光 源。但是，發光二極體在使用時會存在一御問題，就是 發光二極體在照射到物體上時，除了最亮的中心光斑外 ，周圍還存在一個模糊的光斑。這係由於在發光二極體 發射角内的光線充足，而且經過聚光處理，從而能夠形 成中心明亮的光斑，而發光二t極體發射角外的光比較弱 1 ^ 1 * 1 丨；丨'丨丨 ，而且較雜亂’從而形成一個模糊的外層光斑。所以當 〇 發光二極體在觸轉屏上使用時，光感測元件不但感測最 亮的中心光斑’而且還有可能感測模糊的光斑，由此就 會影響感光元件對觸控筆筆尖位置的辨識，造成誤判， 使感測精度降低。 [0004] 【發明内容】 有鑒於此，有必要提供一種光斑清晰，定位準確的觸控 筆〇 [0005] 一種觸控筆，其包括筆桿及筆頭，所述筆頭包括殼體、 透鏡及發光二極體，所述殼體包括相對設置的第一開口 098137501 表單編號A0101 第5頁/共14頁 0982064234-0 201117057 端及第二開口端，所述透鏡收容於所述第一開口端内， 所述第二開口端與所述筆桿相連接，所述發光二極體收 容於所述筆頭的殼體内，所述發光二極體包括發光體， 所述發光體朝向所述透鏡設置，所述筆頭還包括遮光結 構，所述遮光結構採用遮光材料製成，所述遮光結構收 容於所述殼體内，用於遮罩所述發光二極體發射角外的 光線，所述遮光結構上形成有一個透光孔，所述透光孔 位於所述透鏡及發光二極體之間，所述透光孔用於允許 所述發光二極體發射角内的光通過，所述透光孔、發光 二極體及透鏡同軸設覃* [0006] 本發明提供的觸控筆可以通過遮光結構遮幂雜光’利用 遮光結構的透光孔投射發光二極癃中心部分明亮均勻的 光’從而可以防止觸控筆位置的誤判及影響感測精度。 【實施方式】 [0007] 下面將結合附圖，對本發明作進一步的詳細說明。 [0008] 請參閱圖卜為本發明第一實施方式提供的觸控筆10，所 述觸控筆10包括筆桿1〇〇及筆頭200。所述筆桿100内部 裝有用於給所述觸控筆10供電的供電裝裏11 ’所述供電 裝置11可以係電池或USB連接端子等。 [0009] 所述筆頭200包括殼體210、透鏡220、遮光結構230、發 光二極體240及電路板250。 [0010] 所述殼體210包括第一開口端211及第二開口端213 °所 述殼體210大致呈圓錐筒狀《所述殼體2内有一容置腔 212。所述容置腔212貫穿所述第一開口端211及第二開 098137501 表單編號A0101 第6頁/共14頁 0982064234-0 201117057 口端213。本實施方式中，所述容置腔212從所述第一開 口端211至第二開口端213依次形成第一台階孔212a、第 二台階孔212b及第三台階孔212c。所述第一台階孔212a 、第二台階孔212b及第三台階孔212c均為圓形孔。所述 第三台階孔212c内設有凸緣212d，所述凸緣2l2d上加工 有沿所述殼體210軸向設置的滑槽。所述第二開口端213 上加工有螺紋，通過螺紋使筆頭200與所述筆桿1〇〇螺接 [0011] 所述透鏡220包括光學部221及爾定部222。所述透鏡221 〇 收容於所述第一台階孔212a内。本實施方式中，所述透 鏡220的固定部222抵靠於所述第一台階花:242a及第二台 階孔212b.之間的過渡面上。 ：' [0012] 所述發光二極體240包括發光體241、基座242及管腳243 。所述基座242包括相對設置的第一表面242a及第二表面 242b。所述發光體241位於所述第一参面2[42a上，所述 管腳243位於所述第二表面::242b上。本實施方式中，所述 〇 發光體241朝向所述透鏡220。所述基座242抵靠於所述 遮光結構230遠離所述透光孔231的一端。所述管腳243 與所述電路板250電連接。 [0013] 所述遮光結構230收容於所述第二台階孔212b内。本實施 方式中，所述遮光結構230係一圓筒結構，所述遮光結構 230由不透明的塑膝材料製成。當然，所述遮光結構230 也可以係圓盤結構。本實施方式中，所述遮光結構230内 形成有透光孔231及容置孔232 ’所述透光孔231及所述 容置孔2 3 2係圓形孔。當然，所述透光孔2 31的形狀也可 098137501 表單編號A0101 笫7頁/共14頁 0982064234-0 201117057 '把據觸控筆1Q需要投射的光卿狀作其他設計。所述 透光孔231與所述容置孔232相連通，且同轴設置。由於 只需要所述發光二極體24〇發射角内的光，所以所述透光 孔231根據發光二極體24Q的發射角對應設計，使得只有 發射角内的光線可以通過所述透光孔231，其餘的光線將 被所述遮光結構23〇所遮罩。本實施方式中，所述容置孔 232與所述透鏡22〇、所述第二台階孔同轴設置所 述發光體241收容于所述容置孔如内，所述容置孔232 對所述發光二極體240起導向作用，使得所述發光二極體 240犯夠與所述透鏡22〇同軸。另外，所述遮光結構23〇 還對所述發光二極體240起到支撐、固定的作用，防止發 光一極體240安裝後沿筆頭2〇〇彳箄，移動。 [0014] 所述電路板250收容於所述殼體21〇的容置腔212内。本 實施方式中’安裝時，將所述電路板25〇沿筆頭2〇〇軸向 插入所述凸緣212d的滑槽内。所述電路板250與所述供電 裝置11通過導線12電連接。所述電路板250上安裝有各種 保證所述發光二極體240正常工作的電子元件（圖中未標 示）。 [0015] 請參閱圖2，為本發明第二實施方式提供的觸控筆20，所 述觸控筆20與第一實施方式提供的觸控筆1〇基本相同， 其不同之處在於，所述觸控筆20的遮光結構330係一遮光 膜，所述遮光結構330覆蓋在發光二極體340的發光體 341上，所述遮光結構330中心開設有一圓形透光孔331 ，所述透光孔331的大小僅使得所述發光二極體340發射 角以内的光通過’將發射角以外的光遮擋。 098137501 表單煸號A0101 第8頁/共14頁 0982064234-0 201117057 [0016] 本發明提供的觸控筆可以通過遮光結構遮罩雜光，利用 遮光結構的透光孔僅投射發光二極體中心部分明亮均勻 的光，從而可以防止對觸控筆位置的誤判及影響感測精 度。 [0017] 另外，本領域技術人員可在本發明精神内做其他變化， 但是，凡依據本發明精神實質所做的變化，都應包含在 本發明所要求保護的範圍之内。 【圖式簡單說明】 0 [0018] 圖1為本發明第一實施方式提供的觸控筆的示意圖； [0019] 圖2為本發明第二實施方式提供的觸控筆的示意圖。 【主要元件符號說明】 [0020] 觸控筆 1 0、2 0 [0021] 筆桿 100 [0022] 供電裝置11 [0023] 導線 12 〇 [0024] 筆頭 2 0 0 [0025] 殼體 210 [0026] 第一開口端 211 [0027] 容置腔212 [0028] 第一台階孔212a [0029] 第二台階孔212b 098137501 表單編號A0101 第9頁/共14頁 0982064234-0 201117057 [0030] 第三台階孔 212c [0031] 第三台階孔 212d [0032] 第二開口端 213 [0033] 透鏡220 [0034] 光學部221 [0035] 固定部2 2 2 [0036] 遮光結構230 [0037] 透光孔231 、331 [0038] 容置孔232 [0039] 發光二極體 240 、 340 [0040] 發光體241 ' 341 [0041] 基座242 [0042] 第一表面242a [0043] 第二表面242b [0044] 管腳243 [0045] 遮光結構3 3 0 098137501 表單編號 A0101 第 10 頁/共 14 頁 0982064234-0201117057 VI. Description of the Invention: [Technical Field] The present invention relates to a stylus, and more particularly to a stylus capable of projecting a light beam. [0002] [Prior Art] There is an optical touch technology in which a light sensing component is mounted under the touch screen, and a stylus capable of emitting light on the touch screen is operated on the touch screen through light sensing. The position of the component sensing illuminating tip on the touch screen 0003 [0003] realizes the recognition of the touch action. Infrared light-emitting diodes are generally used as light sources in the tip of such a stylus. However, there is a problem in the use of the light-emitting diode, that is, when the light-emitting diode is irradiated onto the object, in addition to the brightest central spot, there is a blurred spot around. This is because the light in the emission angle of the light-emitting diode is sufficient, and after the condensing treatment, a bright spot of the center can be formed, and the light outside the emission angle of the light-emitting two-pole body is weaker by 1 ^ 1 * 1 丨; '丨丨, and more messy' to form a fuzzy outer spot. Therefore, when the 〇 light-emitting diode is used on the touch screen, the light sensing element not only senses the brightest central spot but also may sense the blurred spot, thereby affecting the photosensitive element to the stylus tip. The identification of the position causes misjudgment and reduces the sensing accuracy. [0004] In view of the above, it is necessary to provide a stylus with clear spot and accurate positioning. [0005] A stylus includes a pen and a pen head, the pen head including a housing, a lens and a light emitting a pole body, the housing includes a first opening 098137501 opposite to each other, Form No. A0101, No. 5/14 pages 0982064234-0, 201117057, and a second open end, the lens is received in the first open end, The second open end is connected to the pen holder, the light emitting diode is received in a housing of the pen tip, the light emitting diode includes an illuminant, and the illuminant is disposed toward the lens, The pen tip further includes a light shielding structure, the light shielding structure is made of a light shielding material, and the light shielding structure is received in the housing for shielding light outside the emission angle of the light emitting diode a light-transmitting hole is disposed between the lens and the light-emitting diode, and the light-transmitting hole is configured to allow light in the emission angle of the light-emitting diode to pass through, the light-transmitting hole, Light-emitting diode and Mirror coaxial setting [* [0006] The stylus provided by the present invention can block the stray light by using a light-shielding structure to block the stray light 'using the light-transmitting hole of the light-shielding structure to project the bright and uniform light of the central portion of the light-emitting diode '' Misjudgment and influence sensing accuracy. [Embodiment] The present invention will be further described in detail below with reference to the accompanying drawings. Please refer to FIG. 2 for a stylus pen 10 according to a first embodiment of the present invention. The stylus pen 10 includes a pen holder 1 and a pen tip 200. The pen holder 100 is internally provided with a power supply device 11 for powering the stylus pen 10. The power supply device 11 can be a battery or a USB connection terminal or the like. The pen tip 200 includes a housing 210, a lens 220, a light shielding structure 230, a light emitting diode 240, and a circuit board 250. [0010] The housing 210 includes a first open end 211 and a second open end 213. The housing 210 has a substantially conical cylindrical shape. The housing 2 has a receiving cavity 212 therein. The accommodating cavity 212 extends through the first open end 211 and the second open 098137501. Form No. A0101 Page 6 / 14 pages 0982064234-0 201117057 Port end 213. In the embodiment, the accommodating cavity 212 sequentially forms a first stepped hole 212a, a second stepped hole 212b and a third stepped hole 212c from the first opening end 211 to the second opening end 213. The first stepped hole 212a, the second stepped hole 212b, and the third stepped hole 212c are all circular holes. A flange 212d is formed in the third stepped hole 212c, and the flange 22b is formed with a sliding groove disposed along the axial direction of the housing 210. The second open end 213 is threaded, and the pen tip 200 is screwed to the pen holder 1 by a thread. [0011] The lens 220 includes an optical portion 221 and an abutting portion 222. The lens 221 收容 is received in the first stepped hole 212a. In this embodiment, the fixing portion 222 of the lens 220 abuts against the transition surface between the first step flower 242a and the second step hole 212b. [0012] The light emitting diode 240 includes an illuminant 241, a susceptor 242, and a pin 243. The base 242 includes a first surface 242a and a second surface 242b that are oppositely disposed. The illuminant 241 is located on the first reference surface 2 [42a, and the pin 243 is located on the second surface: 242b. In the present embodiment, the illuminant 241 faces the lens 220. The pedestal 242 abuts against one end of the light shielding structure 230 away from the light transmission hole 231. The pin 243 is electrically connected to the circuit board 250. [0013] The light shielding structure 230 is received in the second stepped hole 212b. In this embodiment, the light shielding structure 230 is a cylindrical structure, and the light shielding structure 230 is made of an opaque plastic knee material. Of course, the light shielding structure 230 can also be a disc structure. In the embodiment, the light-shielding structure 231 and the accommodating hole 232 ′ are formed in the light-shielding structure 230, and the accommodating hole 323 is a circular hole. Of course, the shape of the light-transmitting hole 2 31 can also be 098137501. Form number A0101 笫 7 pages/total 14 pages 0982064234-0 201117057 'The other design according to the stylus 1Q needs to be projected. The light transmission hole 231 is in communication with the receiving hole 232 and coaxially disposed. Since only the light in the emission angle of the light-emitting diode 24 is required, the light-transmitting hole 231 is designed according to the emission angle of the light-emitting diode 24Q, so that only the light in the emission angle can pass through the light-transmitting hole. 231, the remaining light will be covered by the light shielding structure 23〇. In this embodiment, the accommodating hole 232 is disposed coaxially with the lens 22 〇 and the second stepped hole, and the illuminant 241 is received in the accommodating hole, and the accommodating hole 232 is opposite. The light-emitting diode 240 is guided so that the light-emitting diode 240 is coaxial with the lens 22〇. In addition, the light-shielding structure 23A also functions to support and fix the light-emitting diode 240, and prevents the light-emitting diode 240 from moving along the tip 2 after being mounted. [0014] The circuit board 250 is received in the accommodating cavity 212 of the casing 21 〇. In the present embodiment, at the time of mounting, the circuit board 25 is inserted into the sliding groove of the flange 212d in the axial direction of the writing head 2''. The circuit board 250 is electrically connected to the power supply unit 11 via a wire 12. The circuit board 250 is mounted with various electronic components (not shown) that ensure the normal operation of the LEDs 240. [0015] Please refer to FIG. 2 , which is a stylus pen 20 according to a second embodiment of the present invention. The stylus pen 20 is substantially the same as the stylus pen 1 provided in the first embodiment, and the difference is that The light-shielding structure 330 of the stylus pen 20 is a light-shielding film, and the light-shielding structure 330 is disposed on the light-emitting body 341 of the light-emitting diode 340. The light-shielding structure 330 defines a circular light-transmissive hole 331 at the center thereof. The aperture 331 is sized such that light within the emission angle of the LED 340 is occluded by light other than the emission angle. 098137501 Form nickname A0101 Page 8 / Total 14 page 0992064234-0 201117057 [0016] The stylus provided by the present invention can cover the stray light through the light shielding structure, and only the central portion of the light emitting diode is projected by the light transmission hole of the light shielding structure. Bright and uniform light prevents misjudgment of the stylus position and affects sensing accuracy. In addition, those skilled in the art can make other changes within the spirit of the invention, and all changes that are made according to the spirit of the invention are included in the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS [0018] FIG. 1 is a schematic diagram of a stylus according to a first embodiment of the present invention; [0019] FIG. 2 is a schematic diagram of a stylus according to a second embodiment of the present invention. [Main Component Symbol Description] [0020] Stylus 1 0, 2 0 [0021] Pen 100 [0022] Power Supply Device 11 [0023] Wire 12 〇 [0024] Pen 2 0 0 [0025] Housing 210 [0026] First open end 211 [0027] accommodating cavity 212 [0028] first stepped hole 212a [0029] second stepped hole 212b 098137501 Form No. A0101 Page 9 / Total 14 page 0992064234-0 201117057 [0030] Third step hole 212c [0031] third stepped hole 212d [0032] second open end 213 [0033] lens 220 [0034] optical portion 221 [0035] fixing portion 2 2 2 [0036] light shielding structure 230 [0037] light transmission hole 231, [0038] accommodating hole 232 [0039] illuminating diode 240, 340 [0040] illuminant 241 '341 [0041] pedestal 242 [0042] first surface 242a [0043] second surface 242b [0044] tube Foot 243 [0045] Light blocking structure 3 3 0 098137501 Form number A0101 Page 10 of 14 0982064234-0