A7 B7 五、發明説明（/ ) 本發明係關於一種投影頭機構（projection head mechanism)，尤指一種能夠均勻導熱之投影機之投影頭機構。 請參閱圖一，圖一係一種習知的光學投影機（Over Head Projector)。習知的光學投影機一般包括：一主 體10，一文件平台101位於該主體10上，一投影頭機構 11，投影頭機構11包括—上蓋111 ’ 一下蓋112 ’ 一鏡頭 113，以及一投影鏡114 · 在使用時，位於投影機主體10內之光源（未示出）所發 出的光線被主體10內之光學裝置（一般包括一集光玻璃 (c ο n d e n s e r )及一螺旋鏡（F r e s n e 1 1 e n s )，未示出） 收集後穿過文件平台101傳送至鏡頭113對焦後由投影鏡 114投射至一屛幕，以顯示被投影文件的影像。 當投影機被使用時，上蓋111與下蓋112被分開，藉由 調整上蓋111的位置而可以調整影像被投射在屛幕的位置· 於不使用投影機時，上蓋111與下蓋11 2將被閉合在一起以 便防止鏡頭1 13及投影鏡1 14吸附塵埃》 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 當光學投影機再度被使用時，在使用者已開啓電源， 光線已發射到投影頭機構11但上蓋111與下蓋112未被打 開的情況下，投影鏡1 1 4所接收到的光束將因無法被即時排 出而集中熱量於投影鏡1 1 4的一個小區域，在數十秒至數分 鐘內在投影鏡114之該小區域中產生由高溫所引起的內應 力，因而使投影鏡1 14破裂。 一般的業者爲防止這種情況產生，通常會特別在使用 說明書上註明類似「電源開機後，投影鏡蓋必需開啓以防 2 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） 經濟部中央標準局負工消費合作社印製 315428 A7 ___B7_ 五、發明説明（>-) 止投影鏡片破裂J的提示，或是在投影鏡片附近的塑膠蓋 上以印刷標示以提示使用者注意，勿忘掀開投影鏡蓋•換 句話說，習知並無任何解決此問題的方法。 因此，本發明之一目的在提供一種投影機之投影頭機 構，以防止因使用不當所造成之投影鏡的破裂。 本案提供一種投影機之投影頭機構，其係用以將一投 影機之一光源穿透一被投射文件所產生的影像投射至一屛 幕，該投影頭機構包括：一上蓋，具有一內表面；一下 蓋，樞接於該上蓋；一鏡頭，設置於該下蓋，用以使該影 像被對焦；一投影鏡，設置於該上蓋之該內面，用以將該 被對焦之影像反射至該屛幕；一導熱手段，設於該投影鏡 與該上蓋之該內面之間，用以使該投影鏡因該光線所產生 之熱量能均勻地分佈於其表面。 較佳者，該導熱手段包括：一金屬箔設置於該投影鏡 與該上蓋內面之間；一彈性元件，設置於該上蓋內面與該 金屬箔之間，用以使該金屬箔壓附於該投影鏡；一導熱矽 酯，塗覆於該投影鏡。 /本案得藉下列圖式及詳細說明而得一深入了解： 第一圖係一種習知的光學投影機》 第二圓係本發明之投影頭機構之一較佳實施例分解示 意圖。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ---------TV嚷---τ----訂------ (請先聞讀背面之注意事項再填寫本頁.) A7 B7 五、發明説明（令） 請參閱圖二，係本發明之投影頭機構之一較佳實施例 分解示意圖。圖二之本案投影頭機構包括：一上蓋21，上 蓋21具有一內面211，一下蓋22以習知的方式樞接於該上 蓋21，一鏡頭23，設置於該下蓋22，一授影鏡24以習知 的方式被設於該上蓋21之內面211，一導熱手段25，設於 該上蓋之內面211與該投影鏡24之間，在本實施例中導熱 手段25包括一金屬箔25 1設置於該投影鏡24與該上蓋內面 211之間，二彈性元件2 5 2設置於該上蓋內面2 11與該金屬 箔251之間，用以使該金屬箔252壓附於該投影鏡24，一 導熱矽酯253塗覆於該投影鏡2 4之表面。 當投影鏡24接收到光束時，壓附於投影鏡24之金屬箔 252及塗覆於投影鏡24表面之導熱矽酯（silicon compound)253將使光束產生的熱量快速且均勻地分佈於 整個投影鏡24表面而非集中在一小區域，因而可以防止投 影鏡片24破裂。 本案得由熟悉本技藝之人士任施匠思而爲諸般修飾， 然皆不脫如附申請專利範圍所欲保護者。 —. ^ 7 d 裝 ~ I "T 訂 ^..4. (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 4 本紙張尺度適用中國國家標準（CNS ) A4規格（210><297公釐）A7 B7 5. Description of the invention (/) The present invention relates to a projection head mechanism, in particular to a projection head mechanism of a projector capable of uniform heat conduction. Please refer to FIG. 1, which is a conventional optical projector (Over Head Projector). The conventional optical projector generally includes a main body 10, a document platform 101 on the main body 10, a projection head mechanism 11, the projection head mechanism 11 includes an upper cover 111 'a lower cover 112' a lens 113, and a projection mirror 114 · When in use, the light emitted by the light source (not shown) located in the projector body 10 is used by the optical device in the body 10 (generally including a condensing glass (condenser) and a spiral mirror (F resne 1 1 ens), not shown) After being collected, it is sent to the lens 113 through the document platform 101 to focus and then projected to a screen by the projection lens 114 to display the image of the projected document. When the projector is used, the upper cover 111 and the lower cover 112 are separated. By adjusting the position of the upper cover 111, the position where the image is projected on the screen can be adjusted. When the projector is not in use, the upper cover 111 and the lower cover 112 will Closed together to prevent the lens 1 13 and the projection lens 1 14 from attracting dust "Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page) When the optical projector is used again, in When the user has turned on the power and the light has been emitted to the projection head mechanism 11 but the upper cover 111 and the lower cover 112 have not been opened, the light beam received by the projection mirror 1 1 4 will concentrate heat on the projection mirror because it cannot be immediately discharged A small area of 1 1 4 generates an internal stress caused by high temperature in the small area of the projection lens 114 within several tens of seconds to several minutes, thereby causing the projection lens 114 to break. In order to prevent this from happening, the average manufacturer usually specifically states in the instruction manual that "After power is turned on, the projection lens cover must be opened to prevent the 2 paper standards from applying to the Chinese National Standard (CNS) Α4 specification (210X297mm). 315428 A7 ___B7_ printed by the Ministry of Central Standards Bureau Negative Consumers Co., Ltd. 5. Description of the invention (>-) Prompt to prevent the projection lens from breaking J, or a printed sign on the plastic cover near the projection lens to remind the user to pay attention, do not Forget to lift the projection lens cover • In other words, there is no known solution to this problem. Therefore, one object of the present invention is to provide a projection head mechanism for a projector to prevent the projection lens from being improperly used. This case provides a projection head mechanism of a projector, which is used to project an image generated by a light source of a projector through a projected document onto a screen, the projection head mechanism includes: an upper cover with a Inner surface; lower cover, pivotally connected to the upper cover; a lens, set on the lower cover, for focusing the image; a projection lens, set on The inner surface of the upper cover is used to reflect the focused image to the chin screen; a heat conduction means is provided between the projection mirror and the inner surface of the upper cover for the projection mirror to be generated by the light The heat can be evenly distributed on the surface. Preferably, the heat conduction means includes: a metal foil is disposed between the projection mirror and the inner surface of the upper cover; and an elastic element is disposed between the inner surface of the upper cover and the metal foil In order to make the metal foil adhere to the projection mirror; a thermally conductive silicone ester coated on the projection mirror. / This case can get an in-depth understanding by the following diagram and detailed description: The first picture is a common knowledge "Optical Projector" The second circle is an exploded schematic view of one of the preferred embodiments of the projection head mechanism of the present invention. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) --------- TV shouting --- τ ---- order ------ (please read the precautions on the back before filling in this page.) A7 B7 V. Description of the invention (order) Please refer to Figure 2 for the invention An exploded schematic view of one preferred embodiment of the projection head mechanism. The projection head mechanism of the second case in Figure 2 includes: The cover 21 and the upper cover 21 have an inner surface 211, the lower cover 22 is pivotally connected to the upper cover 21 in a conventional manner, a lens 23 is disposed on the lower cover 22, and a shadow mirror 24 is disposed in a conventional manner An inner surface 211 of the upper cover 21 and a heat conduction means 25 are provided between the inner surface 211 of the upper cover and the projection mirror 24. In this embodiment, the heat conduction means 25 includes a metal foil 25 1 disposed on the projection mirror 24 and Between the inner surface 211 of the upper cover, two elastic elements 2 5 2 are disposed between the inner surface 2 11 of the upper cover and the metal foil 251 for pressing the metal foil 252 to the projection mirror 24, and a thermally conductive silicone 253 Coated on the surface of the projection mirror 24. When the projection mirror 24 receives the light beam, the metal foil 252 pressed on the projection mirror 24 and the thermally conductive silicon compound 253 coated on the surface of the projection mirror 24 will make the beam The generated heat is quickly and evenly distributed over the entire surface of the projection lens 24 instead of being concentrated in a small area, thus preventing the projection lens 24 from breaking. This case may be modified by anyone familiar with this skill, such as Shi Jiangsi, but none of them are as protected as the scope of the patent application. —. ^ 7 d Pack ~ I " T Order ^ .. 4. (Please read the notes on the back before filling out this page) Printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 4 This paper standard is applicable to the Chinese National Standard (CNS ) A4 specification (210 > 297 mm)