201232159 六、發明說明： 【發明所屬之技術領域】 本發明係與相機或其他光學產品所使用之伸縮鏡頭有 關，特別是關於一種用於伸縮鏡頭之迴轉筒。 【先前技術】 市面上許多相機之鏡頭係採伸縮式之設計，意即，在 相機開機時其鏡頭係突伸出機殼，而在關機時其鏡頭係縮 合於機殼内。請參閱第一圖，習知達成前述伸縮功能之鏡 頭包含有-迴轉筒10及一平移筒u，該迴轉筒ι〇之外 表面設有-位於其-端之齒部12，以及複數個自另一端 朝該齒部12傾斜地延伸的導槽14，其中至少―該導槽μ 中設有-可沿該導槽14移動之導桂16 ;該平移筒^系 套設於該迴轉筒10外，且該等導杜16係固設於該平移筒 11之内侧；該迴轉筒10係以其齒部12受一驅動裝置 (圖中未示）驅動而旋轉，進而帶動該平移筒π沿該迴 轉筒10之軸向直線移動，藉以使得該鏡頭產生伸縮之動 作。 然而，前述該迴轉筒10的車由向長度須至少為該平移 筒11所需移動之最大距離再加上該齒部12之齒面寬产， 而裝設該鏡頭之相機的厚度必大於該迴轉筒10的^長 度，因此’採用前述鏡頭之相機具有相當之厚度，無法滿 足現今對於相機之薄型化設計需求，因而有待改進^ / 201232159 【發明内容】 有鑑於上述缺失，本發明之主要目的在於提供一種用 於伸縮鏡頭之迴轉筒，可有效地縮減鏡敎縮時之整體長 度’進而使相機更加薄型化。 ★為達成上述目的，本發明所提供之用於伸縮鏡頭之迴 轉筒包含有-本體，該本體具有—外表面、—自該外表面 /向内凹陷之導槽’以及—外齒部，且該本體具有一平行其 徑向之橫剖面係通過該導槽及該外齒部。藉此，該迴轉筒 可以其外齒部受—驅動裝置驅動而轉動，使得—導柱於該 導槽内移動的同時可帶動一與該導柱固接且套合於該迴轉 筒外之平移筒直線移動；而且，該迴轉筒之軸向長度僅略 大於該平移騎需移動之最大距離，因此可有效地縮減鏡 頭縮σ時之整體長度，進而使裝設該鏡頭之相機更力口薄型 化。 生有關本發明所提供之用於伸縮鏡頭之迴轉筒的詳細構 造、特點、組裝或使財式，將於後續的實施方式詳細說 :中予以描述。然而，在本發明領域中具有通常知識者應 能瞭解’料詳細朗以及實施本發赌解的特定實施 例，僅係用於說明本發明，並非用以限制本發明之 請範圍。 【實施方式】 以下將藉由所列舉之實施例配合隨附之圖式，詳細說 明本發明之技術内容及特徵，其中： 201232159 第二圖為本發明一第一較佳實施例所提供之用於伸縮 鏡頭之迴轉筒的立體示意圖； 第三圖為本發明該第一較佳實施例所提供之用於伸縮 鏡頭之迴轉筒的側視示意圖； 第四圖為第二圖沿4-4剖線之剖視圖；以及 第五圖為本發明一第二較佳實施例所提供之用於伸縮 鏡頭之迴轉筒的側視示意圖。 請先參閱第二圖及第三圖，本發明一第一較佳實施例 所提供之用於伸縮鏡頭之迴轉筒1〇包含有一本體，該 本體20係呈二端開放之圓筒狀，具有相對之一第一端面 21及一第二端面22，以及一連接於該第一、第二端面 2卜22之間的外表面24。此外，該本體2〇更具有自其外 表面24向内凹陷之多數個第—導槽31及一第二導槽 32 ’以及一外齒部40。 該等第-導槽31及第二導槽32之形狀係相互類同， • 分別係自該本體20外表面24鄰接該第一端面21位置處 先検向延伸後再朝向該第二端面22傾斜地延伸，並具有 一最靠近該第二端面22之水平區段312、322，惟該第二 導槽32之水平區段322係沿該外表面24鄰接該第二端面 22位置處延伸分布，且係與該外齒部4〇徑向地重叠意 即’耕齒部40及該第二導槽32之水平區段322同樣係 與該第二端面22銜接，惟該水平區段322係重疊於該外 齒部40之外側。如此一來’如第四圖所示該本體2〇具 有一平行其徑向之橫剖面26係通過該等導槽31、32之水 201232159 平區段312、322及該外齒部40，且該水平區段您之深 度係等於該外齒部4G之各齒頂42與該本體 24的距離。 W衣囬 前述本發明所提供之用於伸縮鏡頭之迴轉筒1()係用 以受一平移筒（圖中未示）套接於其外側，並用以使該平 移清所固接之-導柱5〇係可移動地設於該導槽％中；當 該迴轉筒1G以其外齒部4G受—驅動裝置（圖 二 動而，動時’該平移筒會沿該迴轉筒1Q之軸向直線移 動。當该導柱50朝向該迴轉筒1〇之第—端面21移動 時，該鏡頭係產生展開之動作，而當該導柱5〇朝向該迴 轉筒10之第二端面22移動至該導槽32之水平區段奶 時，該鏡賴縮合成錢縣度最小之”。糾，該平 移筒可更設❹數錄職該科槽31對應之導柱㈤ 中未示）’藉由料導_步帶動該平移筒可使得該鏡 頭之伸縮動作更加順暢。更重要較該迴轉筒⑺之轴 向長度係小於斜錢所_狀最大轉力吐該外齒部 40之齒面寬，事實上，該迴轉筒1()之麵長度僅略大於 該平移筒所須移動之最大距離，因此，該迴轉筒1〇可有 效地縮減鏡頭之整體長度，㈣使設有該鏡頭之相機更加 薄型化。 ^藉由前賴第-難實施例可得知，本發明之重點在 於藉由使迴轉筒之外齒部分佈範圍與導槽的路徑部分重 疊’以縮減該迴轉筒之軸向長度，進而達到縮減鏡頭整體 長度之效果，而該效果亦可由以下所述之第二較佳實施例 201232159 達成。 月參閱第五圖，本發明一第二較佳實施例所提供之用 於伸縮鏡頭之迴轉筒⑼具有-第-端面6卜—第二端面 62外表面64、—設於該外表面64且鄰接該第二端面 62之外齒7G ’以及自該外表面64向内凹陷之多數個第 導槽81及1二導槽82。該迴轉筒60與前述第一較 之，1〇之差別在於該第二導槽以形狀係201232159 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a telescopic lens used in a camera or other optical product, and more particularly to a rotary cylinder for a telescopic lens. [Prior Art] Many cameras on the market have a telescopic design, which means that the lens protrudes from the casing when the camera is turned on, and the lens is contracted inside the casing when the camera is turned off. Referring to the first figure, the lens for achieving the aforementioned telescopic function comprises a rotary cylinder 10 and a translation cylinder u. The outer surface of the rotary cylinder is provided with a tooth portion 12 at its end, and a plurality of The other end of the guide groove 14 extending obliquely to the tooth portion 12, wherein at least the guide groove μ is provided with a guide ball 16 movable along the guide groove 14; the translation tube is sleeved outside the rotary tube 10 And the guide roller 16 is fixed on the inner side of the translation tube 11; the rotary cylinder 10 is rotated by the driving portion 12 thereof by a driving device (not shown), thereby driving the translation tube π along the The axial direction of the rotary cylinder 10 moves linearly, so that the lens produces a telescopic action. However, the aforementioned car of the revolving cylinder 10 has a maximum length to be at least the required movement of the translating cylinder 11 plus the tooth surface of the tooth portion 12, and the thickness of the camera on which the lens is mounted must be greater than the The length of the revolving cylinder 10 is such that the camera using the aforementioned lens has a considerable thickness and cannot meet the demand for thin design of the camera today, and thus needs to be improved. ^ 201232159 [Inventive content] In view of the above-mentioned deficiencies, the main object of the present invention The invention provides a rotary cylinder for a telescopic lens, which can effectively reduce the overall length of the lens when it is collapsed, thereby making the camera thinner. In order to achieve the above object, the rotary cylinder for a telescopic lens provided by the present invention comprises a body having an outer surface, a guide groove recessed from the outer surface/inward, and an outer tooth portion, and The body has a transverse cross section through which the radial direction passes through the guide groove and the outer tooth portion. Thereby, the rotary cylinder can be driven by the external toothing portion to be driven by the driving device, so that the guiding column can move in the guiding groove and can drive a translation which is fixed to the guiding column and fits outside the rotating cylinder. The cylinder moves linearly; moreover, the axial length of the rotary cylinder is only slightly larger than the maximum distance required for the translational ride, so that the overall length of the lens when the lens is reduced by σ can be effectively reduced, thereby making the camera equipped with the lens more thin and thin. Chemical. The detailed construction, characteristics, assembly, or manufacturing of the revolving cylinder for the telescopic lens provided by the present invention will be described in detail in the following embodiments. However, those skilled in the art should be able to understand the details of the invention and the specific embodiments of the present invention are not intended to limit the scope of the present invention. The following is a detailed description of the technical content and features of the present invention by using the illustrated embodiments in conjunction with the accompanying drawings, wherein: 201232159 The second figure is provided for use in a first preferred embodiment of the present invention. 3 is a schematic perspective view of a revolving cylinder of a telescopic lens; FIG. 3 is a side view of the revolving cylinder for a telescopic lens according to the first preferred embodiment of the present invention; A cross-sectional view of a line; and a fifth side view of a revolving cylinder for a telescopic lens according to a second preferred embodiment of the present invention. Referring to the second and third figures, a revolving cylinder 1 for a telescopic lens according to a first preferred embodiment of the present invention includes a body, and the body 20 has a cylindrical shape with two ends open, The first end surface 21 and the second end surface 22 are opposite to each other, and an outer surface 24 is connected between the first and second end surfaces 22. In addition, the body 2 〇 further has a plurality of first guide grooves 31 and a second guide groove 32 ′ and an outer tooth portion 40 which are recessed inwardly from the outer surface 24 thereof. The shape of the first guide groove 31 and the second guide groove 32 are similar to each other, and are respectively extended from the outer surface 24 of the body 20 adjacent to the first end surface 21 to the second end surface 22 Extending obliquely and having a horizontal section 312, 322 closest to the second end surface 22, but the horizontal section 322 of the second guiding groove 32 extends along the outer surface 24 adjacent to the second end surface 22, And the radial portion of the external tooth portion 4〇 overlaps, that is, the horizontal portion 322 of the tilling portion 40 and the second guiding groove 32 are also engaged with the second end surface 22, but the horizontal portion 322 overlaps. On the outer side of the outer tooth portion 40. Thus, as shown in the fourth figure, the body 2 has a parallel transverse cross section 26 through which the water 201232159 flat sections 312, 322 and the outer teeth 40 of the guide grooves 31, 32, and The depth of the horizontal section is equal to the distance between the respective tooth tips 42 of the external toothing 4G and the body 24. The garment reel 1 () for the telescopic lens provided by the foregoing invention is used for being sleeved on the outer side of a translation cylinder (not shown) for guiding the translation to be fixed. The column 5 is movably disposed in the guide groove %; when the rotary cylinder 1G is driven by the outer tooth portion 4G thereof (the movement of the rotating cylinder 1G is along the axis of the rotary cylinder 1Q) Moving toward a straight line. When the guide post 50 moves toward the first end surface 21 of the revolving cylinder 1 , the lens generates an unfolding motion, and when the guide post 5 〇 moves toward the second end surface 22 of the revolving cylinder 10 to When the horizontal section of the guide groove 32 is milked, the mirror is reduced to the smallest degree of money county. The correction tube can be further set to the number of the guide column corresponding to the section 31 (5) The rotation of the lens can be made smoother by the material guide _ step. More importantly, the axial length of the rotary cylinder (7) is smaller than the weight of the rotary cylinder, and the maximum rotational force of the external tooth portion 40 is spouted. In fact, the length of the surface of the rotary cylinder 1() is only slightly larger than the maximum distance that the translation cylinder has to be moved. Therefore, the rotary cylinder 1 The overall length of the lens can be effectively reduced, and (4) the camera provided with the lens can be made thinner. According to the first and difficult embodiment, the focus of the present invention is to make the outer portion of the rotary drum The range partially overlaps the path of the guide groove to reduce the axial length of the rotary cylinder, thereby achieving the effect of reducing the overall length of the lens, and the effect can also be achieved by the second preferred embodiment 201232159 described below. The revolving cylinder (9) for a telescopic lens according to a second preferred embodiment of the present invention has a first end surface 6 - an outer surface 64 of the second end surface 62 - disposed on the outer surface 64 and adjacent to the second The outer surface of the end surface 62 is a tooth 7G' and a plurality of guide grooves 81 and a second guide groove 82 recessed inwardly from the outer surface 64. The difference between the rotary cylinder 60 and the first one is that the second guide Slot in shape
槽81相同’且該第二導槽82之水平區段 右一去與该外齒部70重疊;詳而言之，該外齒部70具 哼第二=度較其鄰接區段小之較窄區段72，其較遠離 '一、面62之一端與其鄰接區段形 二導槽82係朝向該外齒部7〇 = 4衫 來’即使該外齒部70之各齒頂76係 8; : Γ之外表面64位於同-曲面，該等導槽 81 =仍可與該外齒部7〇通過該迴轉筒6 '村達到與該迴料_ 最後，必須再次說明， 的構成元件，僅為舉例說明 其他等效元件的替代或變化 所涵蓋。 本發明於_實_中所揭露 ’並非用來限制本案之範圍， ，亦應為本案之申請專利範圍 201232159 【圖式簡單說明】 第一圖為一立體分解圖，係顯示習知伸縮鏡頭之迴轉 筒與平移筒； 第二圖為本發明一第一較佳實施例所提供之用於伸縮 鏡頭之迴轉筒的立體示意圖； 第三圖為本發明該第一較佳實施例所提供之用於伸縮 鏡頭之迴轉筒的側視示意圖； 第四圖為第三圖沿4-4剖線之剖視圖；以及 第五圖為本發明一第二較佳實施例所提供之用於伸縮 鏡頭之迴轉筒的侧視示意圖。 【主要元件符號說明】 [先前技術] 迴轉筒10 平移筒11 齒部12 導槽14 導柱16 [第一較佳實施例] 迴轉筒10 本體20 第一端面21 第一端面22 外表面24 橫剖面26 第一導槽31 水平區段312 第二導槽32 水平區段322 201232159 外齒部40 齒頂42 導柱50 [第二較佳實施例] 迴轉筒60 第一端面61 第二端面62 外表面64 外齒部70 較窄區段72 段差74 齒頂76 第一導槽81 第二導槽82 水平區段822The groove 81 is the same 'and the horizontal section of the second guide groove 82 is overlapped with the outer tooth portion 70; in detail, the outer tooth portion 70 has a second degree smaller than the adjacent portion. The narrow section 72 is farther away from the one end of the one surface 62 and the adjacent section shaped second guide groove 82 toward the outer tooth portion 7 〇 = 4 shirts even if the respective tooth tops 76 of the external tooth portion 70 are 8 ; : The outer surface 64 of the crucible is located on the same-curved surface, and the guide groove 81 = still with the outer tooth portion 7 〇 passes through the revolving cylinder 6 'the village reaches the return material _ Finally, the constituent elements must be explained again, It is intended to cover only alternatives or variations of other equivalent elements. The invention is not disclosed to limit the scope of the present application, and should also be the patent application scope 201232159 of the present invention. [The simple description of the drawing] The first figure is an exploded perspective view showing a conventional telescopic lens. The second embodiment is a perspective view of a rotary cylinder for a telescopic lens according to a first preferred embodiment of the present invention. The third figure is provided by the first preferred embodiment of the present invention. 4 is a cross-sectional view of the revolving lens of the telescopic lens; FIG. 4 is a cross-sectional view taken along line 4-4 of the third drawing; and FIG. 5 is a rotation of the telescopic lens provided by a second preferred embodiment of the present invention. A side view of the barrel. [Major component symbol description] [Prior Art] Rotary cylinder 10 Translation cylinder 11 Tooth 12 Guide groove 14 Guide post 16 [First preferred embodiment] Rotary cylinder 10 Body 20 First end surface 21 First end surface 22 External surface 24 Transverse Section 26 First channel 31 Horizontal section 312 Second channel 32 Horizontal section 322 201232159 External tooth 40 Tooth 42 Guide post 50 [Second preferred embodiment] Rotary cylinder 60 First end face 61 Second end face 62 Outer surface 64 outer tooth portion 70 narrower section 72 step difference 74 tooth tip 76 first guide groove 81 second guide groove 82 horizontal portion 822