201011366 九、發明說明： ’【發明所屬之技術領域】 * 本發明涉及一種調焦組合及具有該調焦組合之投影 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 到極大發展及應用，尤其是手持投影機，可像手電筒一樣 ❹單手攜帶或進行演示。目前，該投影機一般由一個投射圖 像產生裝置’一個鏡頭模組及一個外殼組成。該投射圖像 產生裝置及鏡頭模組均容置於該外殼内，該投射圖像產生 装置產生需要投射之圖像’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式 進行調焦’操作起來比較麻煩，尤其是手持投影機，幾乎 ❹很難單手完成調焦操作。 【發明内容】 有繁於此’有必要提供一種調焦方便之調焦組合及具 有該調焦組合之投影機。 ' 一種調焦組合’其包括一鏡頭模組，該鏡頭模組包括 -外鏡筒及-安裝於該外鏡筒内之内鏡筒，該内鏡筒内容 置有一鏡頭。該外鏡筒之侧壁開設有一與該鏡頭模組之光 &平行之導槽及至少—個與該鏡頭模組之光軸呈—定角度 之凸輪槽。该内鏡筒具有一與該導槽嚙合之導銷’該内鏡 7 .201011366 筒之側壁開設有凸輪槽對應之限位槽，該凸輪槽相對該光 • 軸斜向設置。該鏡頭沿其徑嚮往外延伸出一凸輪銷，該凸 • 輪銷穿過該限位槽與凸輪槽。該調焦組合還進一步包括一 調焦按鍵，該調焦按鍵與該外鏡筒配合，當沿該鏡頭模組 之軸向方向推動該調焦按鍵時，該鏡頭沿該鏡頭模組之軸 向方向移動。 一種投發機，其包括一鏡頭模組及一收容該鏡頭模組 之外殼。該鏡頭模組包括一外鏡筒及一安裝於該外鏡筒内 _ 之内鏡筒，該内鏡筒内容置有一鏡頭。該外鏡筒之側壁開 設有一與該鏡頭模組之光軸平行之導槽及至少一個與該鏡 頭模組之光軸呈一定角度之凸輪槽。該内鏡筒具有一與該 導槽嚙合之導銷，該内鏡筒之側壁開設有凸輪槽對應之限 位槽，該凸輪槽相對該光軸斜向設置。該鏡頭沿其徑嚮往 外延伸出一凸輪銷，該凸輪銷穿過該限位槽與凸輪槽。該 投影機還進一步包括一調焦按鍵，該調焦按鍵與該外鏡筒 • 配合，當沿該鏡頭模組之軸向方向推動該調焦按鍵時，該 鏡頭沿該鏡頭模組之軸向方向移動。該外殼上設置有一供 該鏡頭穿過之出光孔及一與該調焦按鍵對應之滑槽。該滑 槽開設於外殼平行於該光轴之一個侧壁，該出光孔開設於 外殼垂直於該光軸之一個侧壁。 與先前技術相比，本發明提供之調焦組合能夠通過推 按該調焦按鍵，經過該外鏡筒及内鏡筒之傳動，使該鏡頭 沿鏡頭模組之軸向移動，從而達到調焦之目的。本發明還 提供了 一具該調焦組合之投影機。 8 201011366 【實施方式】 • 請參閱圖1及圖2，本發明實施方式提供之投影機100 • 包括一投射圖像產生裝置10，一調焦組合調焦組合200及 一外殼30。該調焦組合200包括一鏡頭模組20及一調焦按 鍵40。該調焦組合200容置於該外殼30且固定於該投射圖 像產生裝置10上。 請參閱圖3，該投射圖像產生裝置10固定於該外殼30 内且其產生之圖像經該鏡頭模組20投射出去。該投影投射 ❿圖像產生裝置10自靠近鏡頭模組20之表面11上延伸出複 數用於固定該鏡頭模組20之定位柱12。 請參閱圖4及圖5，該鏡頭模組20包括一外鏡筒210， 一内鏡筒220及一鏡頭230。 該外鏡筒210於其側壁211上具有一個導槽212,均勻 分佈於側壁211上之三個凸輪槽213及一第一連接部214。 該導槽212與該鏡頭模組20之光軸平行，該凸輪槽213與 Φ 該光軸具有一夾角，該凸輪槽213之形狀為由兩條平行邊 及兩條相對之圓弧組成之類矩形，該第一連接部214用於 與該調焦按鍵40配合以傳動該調焦按鍵40之動作。在本 實施方式中，該第一連接部214為一自外鏡筒210之外表 面向外延伸之突起。 該内鏡筒220安裝於外鏡筒210内並固定於該投射圖 像產生裝置10上。該内鏡筒220具有一與該導槽212嚙合 之導銷221，該導銷221能夠順著該導槽212沿該光軸方向 滑動。該内鏡筒220之側壁222上開設有與該凸輪槽213 9 201011366 對應之限位槽223,該限位槽223之形狀為由兩條平行邊及 * 兩條相對之圓弧組成之類矩形，該凸輪槽213沿内鏡筒220 、 軸向之長度大於該限位槽223沿該内鏡筒220轴向之長 度，且該限位槽223與該光軸具有一個夾角。該凸輪槽213 自鏡頭模組20之入光方嚮往出光方向順時針延伸，而該限 位槽223自入光方嚮往出光方向逆時針延伸。 該内鏡筒220靠近鏡頭模組20之表面11之端面具有 一固定板224，該固定板224上具有與該定位柱12對應之 ® 定位孔225,該内鏡筒220通過該固定板224固定於該投射 圖像產生裝置10上。該導銷221與該内鏡筒220可為一體 結構，也可為分體結構，於本市實施方式中，為組裝方便， 該導銷221與該内鏡筒220為分體結構。 該鏡頭230安裝於内鏡筒220内。該鏡頭230沿其徑 向向外延伸出三個凸輪銷231，該凸輪銷231穿過該凸輪槽 213與限位槽223。該凸輪銷231為能夠繞其中心轴旋轉之 A 滾輪結構，從而可減小凸輪銷231與凸輪槽213及限位槽 223之間之摩擦，且該凸輪銷231之直徑等於該凸輪槽213 或限位槽223之兩條平行邊之寬度，當然該凸輪槽213之 兩條平行邊之寬度也可等於限位槽223之兩條平行邊之寬 度，使凸輪銷231滑動時不產生振盪。當該外鏡筒210沿 其軸向移動時，該凸輪銷231將隨該凸輪槽213滑動，同 時，該凸輪銷231又處於限位槽223中，因此，該凸輪銷 231之運動軌跡為該凸輪槽213與限位槽223形成之貫通孔 之運動軌跡。根據實際需要設計該限位元槽223與該凸輪 201011366 槽213之間之夾角，可使該凸輪銷231於該光軸方向之移 ^ 動幅度小於該外鏡筒210沿光軸方向之移動幅度。該凸輪 ’ 銷231與該鏡頭230可為一體結構，也可為分體結構，在 本實施方式中，為組裝方便，該凸輪銷231與該鏡頭230 為分體結構。 該外殼30用於收容該投射圖像產生裝置10及鏡頭模 組20。該外殼30上設置有一供該鏡頭230穿過之出光孔 31及一與該調焦按鍵40對應之滑槽32。該滑槽32開設於 ® 外殼30平行於該光軸之一個侧壁，該出光孔31開設於外 殼30垂直於該光轴之一個侧壁。 請參閱圖3,該調焦按鍵40安裝於該滑槽32内，用於 驅動該鏡頭模組20移動而實現調焦。該調焦按鍵40包括 一本體41，一按鈕42及一第二連接部43。該本體41為一 平行於該光軸之平板，其具有一個靠近第一連接部214之 内表面411與遠離第一連接部214之外表面412。該按鈕 ©42自該外表面412往遠離本體41方向延伸，該按鈕42用 於供用戶推按該調焦按鍵40沿該光軸方向移動。該第二連 接部43自該内表面411往遠離本體41方向延伸，用於與 該第一連接部214配合。在本實施方式中，該第二連接部 43為一具有一個“U”型槽之收容部，該第一連接部214 收容於該“U”型槽，可以理解，該“U”型槽431為半開 口槽，可方便第一連接部214之組裝。當然，也可是該第 一連接部214為一沿外鏡筒之徑嚮往外延伸之收容部，該 第二連接部43為一突起，該第二連接部43收容於該收容 11 .201011366 部。而且，該第二連接部43還可為一凸銷，此時該第一連 • 接部214可為開設於該外鏡筒210之外壁上之一與該第一 ’ 連接部214配合之盲孔或通孔。 組裝該投影機100時，首先將該鏡頭230裝設於該内 鏡筒220内；其次將該内鏡筒220安裝於該外鏡筒210内； 再次將該導銷221自導槽212伸入固定於内鏡筒220上， 將該凸輪銷231自該凸輪槽213及限位槽223所形成之貫 通孔伸入固定於鏡頭230上，使該外鏡筒210，内鏡筒220 ® 及鏡頭230組裝成一個鏡頭模組20。將該調焦按鍵40與該 鏡頭模組20嚙合；再將通過該固定板224將該鏡頭模組20 固定於該投射圖像產生裝置10上；最後將該投射圖像產生 裝置10,鏡頭模組20及調焦按鍵40 —起容置於該外殼30, 且使該鏡頭模組20對準出光孔31，將該按鈕41自該32 伸出到外殼30外。 在本實施方式中，當需要對該投影機100調焦時，推 巍按該按鈕42,使調焦按鍵40沿光軸方向滑動，籍由該第二 連接部43與第一連接部214之傳動，使外鏡筒210沿光軸 方向移動。該凸輪銷231於外鏡筒210之凸輪槽213之帶 動下也將順著内鏡筒220之限位槽223滑動。該凸輪銷231 還繞自身之中心軸旋轉，減少該凸輪銷231與凸輪槽213 及限位槽223之間之摩擦，同時使該凸輪銷231於光軸方 向之移動速度小於該外鏡筒210沿光軸方向之移動速度。 從而使該凸輪銷231沿光軸方向做微小移動且伴隨著轉 動，帶動該鏡頭230沿光軸方向移動，實現對該投影機100 12 201011366 調焦之目的。 與先刚技#相比’本發明提供之調焦組合能夠通過推 ，按該調焦按鍵，經過該外鏡筒及内鏡筒之傳動，使該鏡顏 =鏡頭模組之軸向移動，從而達到調焦之目的。本發明還 長：供了 一具該調焦組合之投影機。 綜上所述，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組裝示意圖。 圖2為圖1中之投影機揭去外殼時之組裝示意圖。 圖3為圖1中之投影機之立體分解示意圖。 圖4為圖1中之投影機之鏡頭模組之組裝示意圖。 φ 圖5為圖1中之投影機之鏡頭模組之分解示意圖。 【主要元件符號說明】 投影機 100 調焦組合 200 投射圖像產生裝置 10 鏡頭模組 20 外殼 30 調焦按鍵 40 表面 11 定位柱 12 外鏡筒 210 内鏡筒 220 鏡頭 230 側壁 211 、 222 導槽 212 凸輪槽 213 13 201011366 第一連接部 214 導銷 221 限位槽 223 固定板 224 定位孔 225 凸輪銷 231 出光孔 31 滑槽 32 本體 41 按紐 42 第二連接部 43 内表面 411 外表面 412 “U”型槽 431 ❿ 14201011366 IX. Description of the invention: 'Technical field to which the invention pertains» The present invention relates to a focusing combination and a projector having the same. [Prior Art] With the development of projection technology, various types of projectors are widely used in business 'teaching' home theaters, etc. At the same time, micro projectors have been greatly developed and applied, especially handheld projectors, like Carry a flashlight or carry a demonstration like a flashlight. Currently, the projector generally consists of a projection image generating device, a lens module and a housing. The projection image generating device and the lens module are housed in the casing, and the projection image generating device generates an image that needs to be projected and is projected 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, but the focus adjustment by rotating the focus ring' is more troublesome, especially handheld The projector is almost impossible to perform the focusing operation with one hand. SUMMARY OF THE INVENTION There is a need to provide a focusing adjustment that is convenient for focusing and a projector having the focusing combination. A focus adjustment assembly includes a lens module including an outer lens barrel and an inner lens barrel mounted in the outer lens barrel, the inner lens barrel being provided with a lens. The side wall of the outer lens barrel defines a guiding groove parallel to the light and the lens module and at least one cam groove at an angle to the optical axis of the lens module. The inner lens barrel has a guide pin engaged with the guide groove. The inner mirror 7 . 201011366 has a limiting groove corresponding to the cam groove on the side wall of the tube, and the cam groove is disposed obliquely with respect to the light axis. The lens protrudes outwardly from a radial direction of a cam pin, and the convex wheel pin passes through the limiting slot and the cam groove. The focusing combination further includes a focusing button, and the focusing button cooperates with the outer lens barrel, and when the focusing button is pushed along the axial direction of the lens module, the lens is along the axial direction of the lens module Move in direction. A dispenser includes a lens module and a housing for housing the lens module. The lens module includes an outer lens barrel and an inner lens barrel mounted in the outer lens barrel, and the inner lens barrel is provided with a lens. The side wall of the outer barrel is provided with a guiding groove parallel to the optical axis of the lens module and at least one cam groove at an angle to the optical axis of the lens module. The inner lens barrel has a guide pin that engages with the guide groove. The side wall of the inner lens barrel is provided with a corresponding positioning groove of the cam groove, and the cam groove is disposed obliquely with respect to the optical axis. The lens extends a radial direction of the cam pin, and the cam pin passes through the limiting slot and the cam groove. The projector further includes a focus button, the focus button cooperates with the outer lens barrel, and when the focus button is pushed along the axial direction of the lens module, the lens is along the axial direction of the lens module Move in direction. The housing is provided with a light exiting hole through which the lens passes and a sliding slot corresponding to the focusing button. The sliding slot is formed in a side wall of the outer casing parallel to the optical axis, and the light exiting hole is formed in a side wall of the outer casing perpendicular to the optical axis. Compared with the prior art, the focusing combination provided by the present invention can push the focusing button, and the lens is moved along the axial direction of the lens module through the driving of the outer lens barrel and the inner lens barrel to achieve focusing. The purpose. The present invention also provides a projector having the focus combination. 8 201011366 [Embodiment] Referring to FIG. 1 and FIG. 2, a projector 100 according to an embodiment of the present invention includes a projection image generating device 10, a focusing combination focusing combination 200, and a casing 30. The focus combination 200 includes a lens module 20 and a focus button 40. The focus adjustment assembly 200 is housed in the housing 30 and is fixed to the projection image generating device 10. Referring to FIG. 3, the projected image generating device 10 is fixed in the casing 30 and the generated image is projected through the lens module 20. The projection projection image generating device 10 extends from the surface 11 of the lens module 20 to a plurality of positioning posts 12 for fixing the lens module 20. Referring to FIG. 4 and FIG. 5 , the lens module 20 includes an outer barrel 210 , an inner barrel 220 and a lens 230 . The outer lens barrel 210 has a guiding groove 212 on the side wall 211 thereof, and is evenly distributed on the three cam grooves 213 and a first connecting portion 214 on the side wall 211. The guiding groove 212 is parallel to the optical axis of the lens module 20. The cam groove 213 has an angle with the optical axis. The shape of the cam groove 213 is composed of two parallel sides and two opposite arcs. The first connecting portion 214 is configured to cooperate with the focus button 40 to drive the focus button 40. In the embodiment, the first connecting portion 214 is a protrusion extending outward from the outer surface of the outer barrel 210. The inner barrel 220 is mounted in the outer barrel 210 and fixed to the projected image generating device 10. The inner barrel 220 has a guide pin 221 that engages with the guide groove 212, and the guide pin 221 is slidable along the guide groove 212 in the optical axis direction. A limiting slot 223 corresponding to the cam slot 213 9 201011366 is defined in the sidewall 222 of the inner lens barrel 220. The limiting slot 223 is shaped like a rectangle composed of two parallel sides and two opposite arcs. The axial length of the cam groove 213 along the inner lens barrel 220 is greater than the length of the limiting groove 223 along the axial direction of the inner lens barrel 220, and the limiting groove 223 has an angle with the optical axis. The cam groove 213 extends clockwise from the light entering direction of the lens module 20 toward the light emitting direction, and the limiting groove 223 extends counterclockwise from the light entering direction to the light emitting direction. The end surface of the inner lens barrel 220 adjacent to the surface 11 of the lens module 20 has a fixing plate 224 having a positioning hole 225 corresponding to the positioning post 12, and the inner lens barrel 220 is fixed by the fixing plate 224. The projection image generating device 10 is mounted on the projection image generating device 10. The guide pin 221 and the inner barrel 220 may be of a unitary structure or a separate structure. In the embodiment of the present invention, the guide pin 221 and the inner barrel 220 have a separate structure. The lens 230 is mounted in the inner barrel 220. The lens 230 extends outwardly along the radial direction of the three cam pins 231, and the cam pins 231 pass through the cam grooves 213 and the limiting slots 223. The cam pin 231 is an A roller structure that is rotatable about a central axis thereof, so that the friction between the cam pin 231 and the cam groove 213 and the limiting groove 223 can be reduced, and the diameter of the cam pin 231 is equal to the cam groove 213 or The width of the two parallel sides of the limiting groove 223, of course, the width of the two parallel sides of the cam groove 213 may also be equal to the width of the two parallel sides of the limiting groove 223, so that the cam pin 231 does not oscillate when sliding. When the outer lens barrel 210 moves along its axial direction, the cam pin 231 will slide with the cam groove 213, and at the same time, the cam pin 231 is again in the limiting groove 223, so the movement track of the cam pin 231 is The movement path of the through hole formed by the cam groove 213 and the limiting groove 223. The angle between the limiting slot 223 and the slot 213 of the cam 201011366 is designed according to actual needs, so that the moving amplitude of the cam pin 231 in the optical axis direction is smaller than the moving range of the outer barrel 210 in the optical axis direction. . The cam 231 and the lens 230 may be of a unitary structure or a separate structure. In the present embodiment, the cam pin 231 and the lens 230 have a separate structure for assembly. The casing 30 is for housing the projection image generating device 10 and the lens module 20. The housing 30 is provided with a light exit hole 31 through which the lens 230 passes and a sliding slot 32 corresponding to the focus button 40. The sliding slot 32 is defined by a side wall of the ® housing 30 parallel to the optical axis. The light exit hole 31 is defined in a side wall of the housing 30 perpendicular to the optical axis. Referring to FIG. 3, the focus button 40 is mounted in the sliding slot 32 for driving the lens module 20 to achieve focusing. The focus button 40 includes a body 41, a button 42 and a second connecting portion 43. The body 41 is a flat plate parallel to the optical axis and has an inner surface 411 adjacent to the first connecting portion 214 and an outer surface 412 away from the first connecting portion 214. The button ©42 extends from the outer surface 412 away from the body 41. The button 42 is for the user to push the focus button 40 to move in the optical axis direction. The second connecting portion 43 extends from the inner surface 411 away from the body 41 for mating with the first connecting portion 214. In this embodiment, the second connecting portion 43 is a receiving portion having a "U" shaped groove. The first connecting portion 214 is received in the "U" shaped groove. It can be understood that the "U" shaped groove 431 As a semi-opening groove, the assembly of the first connecting portion 214 can be facilitated. Of course, the first connecting portion 214 is a receiving portion extending outward in the radial direction of the outer barrel. The second connecting portion 43 is a protrusion, and the second connecting portion 43 is received in the receiving portion 11.201011366. Moreover, the second connecting portion 43 can also be a protruding pin. In this case, the first connecting portion 214 can be blinded to one of the outer walls of the outer lens barrel 210 and the first connecting portion 214. Hole or through hole. When the projector 100 is assembled, the lens 230 is first mounted in the inner lens barrel 220; secondly, the inner lens barrel 220 is mounted in the outer lens barrel 210; the guide pin 221 is again extended from the guide groove 212. The lens pin 231 is fixed to the lens 230 and is fixed to the lens 230 by the through hole formed by the cam groove 213 and the limiting groove 223, so that the outer lens barrel 210, the inner tube 220 ® and the lens 230 is assembled into a lens module 20. The focusing button 40 is engaged with the lens module 20; the lens module 20 is fixed to the projection image generating device 10 through the fixing plate 224; finally, the projection image generating device 10, the lens module The group 20 and the focus button 40 are placed on the outer casing 30, and the lens module 20 is aligned with the light hole 31, and the button 41 is extended from the 32 to the outside of the outer casing 30. In this embodiment, when it is necessary to focus the projector 100, the button 42 is pushed and pressed to slide the focus button 40 in the optical axis direction, and the second connecting portion 43 and the first connecting portion 214 are used. The transmission moves the outer barrel 210 in the optical axis direction. The cam pin 231 is also slid along the limiting groove 223 of the inner barrel 220 by the cam groove 213 of the outer barrel 210. The cam pin 231 also rotates around its central axis to reduce the friction between the cam pin 231 and the cam groove 213 and the limiting groove 223, and simultaneously moves the cam pin 231 in the optical axis direction to be smaller than the outer barrel 210. The speed of movement along the optical axis. Therefore, the cam pin 231 is slightly moved in the optical axis direction, and the lens 230 is moved in the optical axis direction along with the rotation, thereby achieving the purpose of focusing the projector 100 12 201011366. Compared with the first technology #, the focusing combination provided by the present invention can be moved by the push button, the focus lens, and the inner lens barrel, so that the mirror lens = the axial movement of the lens module. Thereby achieving the purpose of focusing. The invention is also long: a projector for this focusing combination is provided. 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, which is not intended 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 schematic view showing the assembly of a projector according to an embodiment of the present invention. FIG. 2 is an assembled view of the projector of FIG. 1 with the outer casing removed. 3 is a perspective exploded view of the projector of FIG. 1. 4 is a schematic view showing the assembly of the lens module of the projector of FIG. 1. φ Figure 5 is an exploded view of the lens module of the projector of Figure 1. [Main component symbol description] Projector 100 Focusing combination 200 Projection image generating device 10 Lens module 20 Housing 30 Focusing button 40 Surface 11 Positioning post 12 External lens barrel 210 Inner tube 220 Lens 230 Side wall 211, 222 Guide groove 212 cam groove 213 13 201011366 first connecting portion 214 guide pin 221 limiting groove 223 fixing plate 224 positioning hole 225 cam pin 231 light exit hole 31 chute 32 body 41 button 42 second connecting portion 43 inner surface 411 outer surface 412 " U" groove 431 ❿ 14