1374328 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種投影機。 【先前技術】 隨著投影技術之發展，各種類型之投影機被廣泛應用 到商務’教學，家庭影院等場合，同時，微型投影機也得 2極大發展及應用，尤其是手持投影機，可像手電筒一樣 單手攜帶或進行演示。目前，該投影機—般由—個投射圖 像產生裝置，一個鏡頭模組及一個外殼組成。該投射圖像 產生農置及鏡頭模組均容置於該外殼内，該投射圖像產生 裝置產生而要投射之圖像，並經該鏡頭模組投射出去。為 使投射之圖像清晰，該鏡頭模組上經常設置一旋轉之調焦 環對鏡頭模組進行調焦操作，然而通過旋轉調焦環之方 進行調焦，操作起來比較麻帛，尤其是手持投影機 报難單手完成調焦操作。 【發明内容】 有馨於此’有必要提供一種調焦方便之投影機。 種才又'IV機，其包括一鏡頭模組，該鏡頭模組包括一 外鏡同及-安裝於該外鏡筒内之内鏡筒，言亥内鏡筒中收容 ，一投射鏡頭。該外鏡筒之側壁開設有至少-個與鏡頭模 組之光軸呈—定角度之溝槽，該内鏡筒之外壁沿其軸向設 有與該溝槽對應之導槽，該投射鏡頭沿其徑向延伸出—導 才主i該導柱穿過該導槽與溝槽。該投影機S進—步包括一 平仃於β鏡頭模組之中心軸之調焦按鍵，該調焦按鍵靠近 7 1374328 鏡頭模組之一側延伸出一凸輪銷。該鏡頭模組上具有與該 - 凸輪銷嚙合之凸輪槽，該凸輪槽相對該鏡頭模組之光軸斜 . 向設置。當沿該光軸方向推動該調焦按鍵時，該投射鏡頭 將沿該光轴方向移動。 與先前技術相比，本發明提供之投影機通過於該鏡頭 模組上設置一凸輪槽及於該調焦按鍵上設置一與該凸輪槽 ' 嚙合之凸輪銷，即能夠實現通過推按該調焦按鍵之方式對 投影機進行調焦，操作方便。 • 【實施方式】 請參閱圖1至圖4，本發明實施方式提供之投影機100 包括一鏡頭模組10，一外殼20，一調焦按鍵30及一投射 圖像產生裝置（未晝出）。該投射圖像產生裝置產生需要投 射之圖像並經由該鏡頭模組10將圖像投射出去。 該鏡頭模組10包括一套筒11，一外鏡筒12，一内鏡 筒13及一投射鏡頭14。 該套筒11套設於外鏡筒12上，該套筒11之内徑與該 ® 外鏡筒12之外徑大致相等。該套筒11之外壁111開設有 一條凸輪槽112，該凸輪槽112與該鏡頭模組10具有一個 夾角，該套筒11之外壁111設有三個均勻分佈之定位孔 113。在本實施方式中，該凸輪槽112之深度小於該套筒11 之壁厚。可以理解，該凸輪槽112還可直接開設於該外鏡 筒12上。 該外鏡筒12之側壁121上具有三個均勻分佈於側壁 121上之定位柱122，三個均勻分佈於側壁121上之限位槽 8 1374328 123及三個均勻分佈於侧壁121上之溝槽124。該定位柱122 -自外鏡筒12之徑向向外延伸而出，用於與該定位孔113配 , 合，使該套筒11與外鏡筒12相對固定。該三個限位槽123 分佈於該外鏡筒12垂直於該鏡頭模組10之光軸之圓周 上。該溝槽124與該光軸斜向設置。在本實施方式中，該 溝槽124沿光軸方向之行程小於或等於該凸輪槽112沿光 轴方向之行程。當然，該溝槽124沿光軸方向之行程也可 大於該凸輪槽112沿光軸方向之行程。為組裝方便，該定 • 位柱122與外鏡筒12為分體結構。在本實施方式中，沿該 鏡頭模組10之出光方向看，該溝槽124沿順時針方向順著 出光方向向前延伸。 該内鏡筒13安裝於外鏡筒12内，該内鏡筒13之外徑 與外鏡筒12之内徑大致相等。該内鏡筒13沿其徑向向外 延伸出三個與該限位槽123對應之限位柱131。該内鏡筒 13通過限位柱131與該限位槽123配合，從而限制該外鏡 筒12沿該光軸方向移動。該内鏡筒13於其外壁設有三個 ® 均勻分佈之導槽132，該導槽132平行於該光轴設置，且該 導槽132與該溝槽124對應，該導槽132沿光軸方向之行 程為該鏡頭模组10之調焦行程。在本實施方式中，該導槽 132沿光軸方向之行程小於或等於該溝槽124沿光軸方向 之行程。當然，該導槽132沿光軸方向之行程還可大於該 溝槽124沿光轴方向之行程。該内鏡筒13之一端還具有一 固定板133，籍由該固定板133使該鏡頭模組10固定於該 投射圖像產生裝置或外殼20上。為組裝方便，該限位柱131 9 1374328 與内鏡筒13為分體結構。 • 該投射鏡頭14安裝於内鏡筒13内，該投射鏡頭14之 .外徑與内鏡筒13内徑大致相等。該投射鏡頭μ沿其徑向 向外延伸出三個與該溝槽124對應之導柱141，該導柱141 穿過該導槽132與溝槽124。當該外鏡筒12繞内鏡筒13 轉動時，該導柱141將在溝槽124中運動，且由於導槽132 之限位，該導柱141只能於導槽132中滑動，亦即沿該光 軸方向前後移動。為組裝方便，該導柱141與投射鏡頭14 •為分體結構。 該外殼20 (只畫出部分）用於收容該鏡頭模組1〇，調 焦按鍵30及投射圖像產生裝置。該外殼2〇上設置有一供 該鏡頭模組10之光線穿過之出光孔21及一供該調焦按鍵 3〇伸出並滑動之滑槽22。 該調焦按鍵30與鏡頭模組1〇配合，用於為該鏡頭模 組10調焦。該調焦按鍵30平行於該鏡頭模組10並靠近該 _凸輪槽112，其包括一個本體31，一個按紐32及一個凸輪 *銷33。该本體31為一平行於該光軸之平板，其具有一個靠 近》亥凸輪槽112之内表面31〇及一個遠離該凸輪槽犯之 外表面320。δ玄按鈕32自該外表面32〇往遠離本體方向 Λ延伸’該独32用於供用戶推按該調焦按鍵％沿該光轴 、方向移動。該凸輪銷33自該内表面31()往遠離本體Μ方 向延伸，該凸輪銷33用於與該凸輪槽112嚙合。 組裝該投㈣時，首先將該投射鏡頭卩安襄於該 内鏡筒13;然後將該内鏡筒13裂設於該外鏡冑12;再將 1374328 該限位柱131自限位槽123伸入固定於内鏡筒13上，將該 - 導柱141伸入該導槽132及溝槽114固定於投射鏡頭14 . 上；最後將該外鏡筒12裝設於該套筒11中，並使該定位 柱122伸入該定位孔113，且該定位孔113與該定位柱122 過盈配合，使該套筒11，外鏡筒12，内鏡筒13及投射鏡 頭14組裝成該鏡頭模組10。然後將該調焦按鍵30與該鏡 頭模組10嚙合，再將該固定板133固定於投射圖像產生裝 置上。最後將該投射圖像產生裝置，鏡頭模組10及調焦按 • 鍵30 —起容置於該外殼20，且使該鏡頭模組10對準出光 孔21，將該按鈕32自該滑槽22伸出到外殼20外。 在本實施方式中，當需要對該投影機100調焦時，推 動該按鈕32,使調焦按鍵30沿該光軸方向前進或者後退。 譬如，選擇向靠近該出光孔21方向推動該按鈕32，使該調 焦按鍵30於滑槽22中滑動，該調焦按鍵30上之凸輪銷33 將於凸輪槽112中運動。籍由該凸輪銷33之傳動，該套筒 11及與該套筒11固定之外鏡筒12繞鏡頭模組10之光軸轉 * 動。順著該光軸往該鏡頭模組10之出光方向看，該外鏡筒 12及凸套筒11為順時針轉動。此時，該導柱141將於外鏡 筒12上之溝槽124之帶動下於導槽132中滑動，從而使該 . 投射鏡頭14沿該光軸方嚮往遠離出光孔21方向移動。皮 . 之，選擇向遠離該出光孔21方向推動該按鈕32,則該投射 鏡頭14將沿該光轴方嚮往靠近出光孔21方向移動。 與先前技術相比，本發明提供之投影機通過於該鏡頭 模組上設置一凸輪槽及於該調焦按鍵上設置一與該凸輪槽 11 1374328 嚙合之凸輪銷，即能夠實現用推按該調焦按鍵之方式對投 . 影機進行調焦，操作方便。 . 综上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 • 圖1為本發明實施方式提供之投影機之立體分解示意 圖。 圖2為圖1中之投影機另一視角之立體分解示意圖。 圖3為圖1中之投影機之組裝示意圖。 圖4為圖3中之投影機另一視角之示意圖。 【主要元件符號說明】 投影機 100 鏡頭模組 10 外殼 20 調焦按鍵 30 套筒 11 外鏡筒 12 内鏡筒 13 投射鏡頭 14 外壁 111 凸輪槽 112 定位孔 113 側壁 121 定位柱 122 限位槽 123 溝槽 124、114 限位柱 131 導槽 132 固定板 133 導柱 141 出光孔 21 12 1374328 滑槽 22 本體 31 按紐 32 凸輪銷 33 内表面 310 外表面 3201374328 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a projector. [Prior Art] With the development of projection technology, various types of projectors are widely used in business 'teaching, home theater, etc. At the same time, micro projectors have also been greatly developed and applied, especially handheld projectors, like Carry it with a flashlight or demonstrate it with one hand. At present, the projector is generally composed of a projection image generating device, a lens module and a casing. The projected image is generated by the agricultural device and the lens module, and the projected image generating device generates an image to be projected and projects through the lens module. In order to make the projected image clear, the lens module is often provided with a rotating focus ring to adjust the lens module. However, by rotating the focus ring to adjust the focus, the operation is rather paralyzed, especially Handheld projectors report difficulty to complete the focusing operation with one hand. SUMMARY OF THE INVENTION It is necessary to provide a projector with convenient focusing. The 'IV machine' includes a lens module, and the lens module includes an outer mirror and an inner lens barrel mounted in the outer lens barrel, and a projection lens in the inner tube. The sidewall of the outer lens barrel is provided with at least one groove at an angle to the optical axis of the lens module, and the outer wall of the inner lens barrel is provided with a guiding groove corresponding to the groove along the axial direction thereof, the projection lens Extending along its radial direction—the main guide i passes through the guide groove and the groove. The projector S further includes a focusing button that is flat on the central axis of the beta lens module, and the focusing button extends a cam pin adjacent to one side of the lens module of the 7 1374328. The lens module has a cam groove that engages with the cam pin, and the cam groove is disposed obliquely with respect to the optical axis of the lens module. When the focus button is pushed in the direction of the optical axis, the projection lens moves in the direction of the optical axis. Compared with the prior art, the projector provided by the present invention can provide a cam slot on the lens module and a cam pin on the focus button that engages with the cam groove. The focus button is used to adjust the focus of the projector, which is convenient to operate. The first embodiment of the present invention includes a lens module 10, a housing 20, a focusing button 30, and a projection image generating device (not shown). . The projected image generating device generates an image to be projected and projects the image through the lens module 10. The lens module 10 includes a sleeve 11, an outer barrel 12, an inner barrel 13 and a projection lens 14. The sleeve 11 is sleeved on the outer barrel 12, and the inner diameter of the sleeve 11 is substantially equal to the outer diameter of the outer tube 12. The outer wall 111 of the sleeve 11 is provided with a cam groove 112. The cam groove 112 has an angle with the lens module 10. The outer wall 111 of the sleeve 11 is provided with three evenly distributed positioning holes 113. In the present embodiment, the depth of the cam groove 112 is smaller than the wall thickness of the sleeve 11. It can be understood that the cam groove 112 can also be directly opened on the outer lens barrel 12. The side wall 121 of the outer lens barrel 12 has three positioning posts 122 uniformly distributed on the side walls 121, three limiting slots 8 1374328 123 uniformly distributed on the side walls 121 and three grooves uniformly distributed on the side walls 121. Slot 124. The positioning post 122 is extended radially outward from the outer barrel 12 for engaging with the positioning hole 113 to fix the sleeve 11 and the outer barrel 12. The three limiting slots 123 are distributed on the circumference of the outer lens barrel 12 perpendicular to the optical axis of the lens module 10. The groove 124 is disposed obliquely to the optical axis. In the present embodiment, the stroke of the groove 124 in the optical axis direction is less than or equal to the stroke of the cam groove 112 in the optical axis direction. Of course, the stroke of the groove 124 in the optical axis direction may also be greater than the stroke of the cam groove 112 in the optical axis direction. For ease of assembly, the fixed column 122 and the outer barrel 12 are of a separate structure. In the present embodiment, the groove 124 extends forward in the clockwise direction along the light exiting direction as viewed in the light exiting direction of the lens module 10. The inner barrel 13 is mounted in the outer barrel 12, and the outer diameter of the inner barrel 13 is substantially equal to the inner diameter of the outer barrel 12. The inner lens barrel 13 extends three radially outwardly from the limiting post 131 corresponding to the limiting slot 123. The inner lens barrel 13 is engaged with the limiting groove 123 through the limiting post 131 to restrict the outer lens barrel 12 from moving in the optical axis direction. The inner lens barrel 13 is provided with three uniformly distributed guide grooves 132 on its outer wall. The guide groove 132 is disposed parallel to the optical axis, and the guide groove 132 corresponds to the groove 124. The guide groove 132 is along the optical axis direction. The stroke is the focusing stroke of the lens module 10. In the present embodiment, the stroke of the guide groove 132 in the optical axis direction is less than or equal to the stroke of the groove 124 in the optical axis direction. Of course, the stroke of the guide groove 132 in the optical axis direction may be greater than the stroke of the groove 124 in the optical axis direction. One end of the inner lens barrel 13 further has a fixing plate 133 for fixing the lens module 10 to the projection image generating device or the casing 20 by the fixing plate 133. For ease of assembly, the limiting post 131 9 1374328 and the inner barrel 13 are of a separate structure. • The projection lens 14 is mounted in the inner barrel 13, and the outer diameter of the projection lens 14 is substantially equal to the inner diameter of the inner barrel 13. The projection lens μ extends three radially outwardly from the guide post 141 corresponding to the groove 124. The guide post 141 passes through the guide groove 132 and the groove 124. When the outer barrel 12 rotates around the inner barrel 13, the guide post 141 will move in the groove 124, and due to the limitation of the guide groove 132, the guide post 141 can only slide in the guide groove 132, that is, Move back and forth along the optical axis direction. For ease of assembly, the guide post 141 and the projection lens 14 are in a split configuration. The casing 20 (only a part of which is shown) is for accommodating the lens module 1 〇, the focus button 30, and the projected image generating device. The housing 2 is provided with a light exiting hole 21 through which the light of the lens module 10 passes and a sliding slot 22 for the focusing button 3 to protrude and slide. The focus button 30 is coupled to the lens module 1 for focusing the lens module 10. The focus button 30 is parallel to the lens module 10 and adjacent to the cam groove 112. It includes a body 31, a button 32 and a cam * pin 33. The body 31 is a flat plate parallel to the optical axis, and has an inner surface 31〇 near the inner cam groove 112 and an outer surface 320 which is remote from the cam groove. The δ button 32 extends from the outer surface 32 away from the body. The single 32 is used for the user to push the focus button % to move along the optical axis and direction. The cam pin 33 extends from the inner surface 31 () away from the body bore, and the cam pin 33 is for engaging the cam groove 112. When the projection (4) is assembled, the projection lens is first mounted on the inner lens barrel 13; then the inner lens barrel 13 is ruptured to the outer mirror 胄12; and the limiting post 131 is self-limiting from the limiting slot 123. The extension tube is fixed to the inner lens barrel 13 , and the guide post 141 extends into the guide groove 132 and the groove 114 is fixed to the projection lens 14 . Finally, the outer lens barrel 12 is mounted in the sleeve 11 . The positioning post 122 is inserted into the positioning hole 113, and the positioning hole 113 is in interference fit with the positioning post 122, so that the sleeve 11, the outer barrel 12, the inner barrel 13 and the projection lens 14 are assembled into the lens. Module 10. Then, the focus button 30 is engaged with the lens module 10, and the fixing plate 133 is fixed to the projection image generating device. Finally, the projection image generating device, the lens module 10 and the focus control button 30 are placed in the outer casing 20, and the lens module 10 is aligned with the light exit hole 21, and the button 32 is driven from the chute. 22 extends out of the outer casing 20. In the present embodiment, when it is necessary to focus the projector 100, the button 32 is pushed to advance or retreat the focus button 30 in the optical axis direction. For example, the button 32 is selected to be pushed toward the light exit opening 21 to slide the focus button 30 in the chute 22, and the cam pin 33 on the focus button 30 will move in the cam groove 112. By the transmission of the cam pin 33, the sleeve 11 and the sleeve 11 are fixed, and the lens barrel 12 is rotated around the optical axis of the lens module 10. The outer barrel 12 and the convex sleeve 11 are rotated clockwise as viewed in the direction of the light exiting the lens module 10. At this time, the guide post 141 slides in the guide groove 132 by the groove 124 on the outer lens barrel 12, so that the projection lens 14 moves in the direction of the optical axis away from the light exit hole 21. When the button 32 is pushed away from the light exit hole 21, the projection lens 14 is moved in the direction of the optical axis toward the light exit hole 21 in the direction of the optical axis. Compared with the prior art, the projector provided by the present invention can provide a cam slot on the lens module and a cam pin on the focus button that engages the cam slot 11 1374328. The method of focusing the button is to focus on the projector. The operation is convenient. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the present invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective exploded view of a projector according to an embodiment of the present invention. 2 is a perspective exploded view of another perspective of the projector of FIG. 1. 3 is a schematic view showing the assembly of the projector of FIG. 1. 4 is a schematic view of another perspective of the projector of FIG. 3. [Description of main components] Projector 100 Lens module 10 Housing 20 Focusing button 30 Sleeve 11 External tube 12 Inner tube 13 Projection lens 14 Outer wall 111 Cam groove 112 Positioning hole 113 Side wall 121 Positioning post 122 Limiting groove 123 Grooves 124, 114 Retaining post 131 Guide groove 132 Fixing plate 133 Guide post 141 Light exit hole 21 12 1374328 Chute 22 Body 31 Button 32 Cam pin 33 Inner surface 310 Outer surface 320
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