1332117 099年08月16日接正替换頁 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及光學自動對焦裝置，尤其涉及用於數位相機 之光學自動對焦裝置。 【先前技術】 [0002] 最初出現的數位相機多採用固定焦距之鏡頭，即鏡片組 之間以及鏡片組與影像感測器之間之距離是定值’根據 光學公式l/p + l/q=l/f，拍攝目標之物距也是定值。如 果拍攝目標所處位置超出鏡頭預設之物距範圍，那麼拍 攝所得圖像將變得模糊不清，因此大大限制了取景範圍 〇 [0003] 針對上述固定鏡頭之不足，部分敫位相機之解決辦法是 採用一種放大插值方法對數位信號做放大處理，惟，如 此僅使原來較小區域放大而已，並不會有新的資訊增加 ’因此實用性不大。 [0004] 相對而言，從透鏡之原理出發，通過改變數位相機鏡頭 之焦距或像距在很大程度上則可解決這一問題。當拍攝 目標超出物距範圍時，通過改變焦距或像距得到一個適 於該目標之新物距，因而可保證圖像品質。當然，焦距 或像距之改變也是有限的，對於不同之鏡片組，其變化 範圍亦不同β [0005] 093138268 如第一圖，第一鏡片316和第二鏡片322分別安裝在外框 314和磁性材質之第二圓桎體32〇中，在外框314和第二 圓柱體320之間設置-彈簧324，並在位於外框314上之 第一圓柱體312表面環繞一線圈318。給線圈318通電， 表單編號A0HU 第3頁/共16頁 0993292467-0 1332117 在第二圓柱體320和線圈318之間產生一克服彈簧324之 磁力’帶動第二圓柱體320作轴向運動，因而可改變第一 鏡片316和第二鏡片322之距離，達到調焦之目的。相關 專利可參閱公開於2 0 0 4年8月4日之中國大陸專利申請第 CN1517775A號。 [0006] 以上調焦裝置雖然可實現自動調焦之目的，但其線圈以 及彈簧之驅動結構都設置在鏡片組之間，使得鏡頭内部 結構較爲複雜，加大了生產組裝之難度；支撑鏡片之第 二圓枉體320之整體或局部需要用高磁性金屬或磁鐵製造 ，並且其内部還要安裝鏡片，因而製造不方便。 【發明内容】 [0007] 本發明之目的是提供一種光學自動對焦裝置，藉由常用 定焦鏡片模組和一驅動結構就可進行光學調焦，不需増 加額外空間，並可降低生産及址裝難度。 [0008] 爲了解決上述技術問題，本發明提供一種用於數位相機 的光學自動對焦裝置，包括一鏡頭模組，一驅動結構， 一連接於電路板之影像感測器，所述鏡頭模組由鏡座和 安裝鏡片組之鏡架組成；該鏡座爲階梯狀，包括鏡筒和 基座，鏡筒用於安裝鏡架，基座用於容納驅動結構，該 驅動結構包括電磁鐵結構、永久磁體以及彈簧；該電磁 鐵結構和永久磁體中任一個固定在鏡座或電路板上，另 一個固定在鏡座和電路板的另外一楠上；該彈簧安裝在 鏡座和電路板之間，並且呈拉伸或壓縮狀態；所述光學 自動對焦裝置還包括兩個在袖向具有不同高度之阻擋件 ’給電磁鐵結構通電，其産生之磁力帶動鏡頭模組克服 093138268 表單編號A0101 第4頁/共16頁 0993292467-0 1332117 彈簧回復力而作軸向運動 099年〇8月16日 ，直到受阻擋件之阻擋而停止 按正· [0009] 由於本發明光學自動對焦裝置可以採用常用固定鏡片模 組，用於對焦之驅動結構女裝在鏡座之内部，因而不需 另行設計鏡片模組，也不需要增加額外之空間就可實現 自動對焦之功能》 【實施方式】 [0010] 本發明自動對焦裝置爲兩段式對焦裝置，既可使鏡頭處 於近距離對焦位置，也可以處於遠距離對焦位置。本發 明採用電磁鐵結構和彈簧驅動鏡頭作軸向運動，以實現 鏡頭之近距離對焦和遠距離對德> [0011] 請參閱第二圖，鏡頭模組1包括鏡架12和鏡座14，鏡架12 用於安裝鏡片組（未標示），鏡座14爲階梯狀，由鏡筒 142、基座144以及連接該鏡筒142和基座144之外肩146 組成，其中鏡筒142之内徑小於基座144之内徑。鏡架12 套裝在鏡座14之鏡筒142中’二者之間藉由螺紋或其他方 式裝配在一起。 [0012] 驅動結構2包括複數第一電磁鐵結構22a、複數第一永久 磁體24a以及複數第一彈簧26a，此三者數量相同。第一 電磁鐵結構22a由第一感磁體222a和環繞第一感磁體 222a之第一線圈224a組成，第一感磁體222a的上端以嵌 入或枯接等方式固定在鏡座14之外肩146之下表面。複數 第一電磁鐵結構22a沿圓周方向均勻地固定在鏡座丨4上， 複數第一永久磁體24a與複數第一電磁鐵結構22a一一對 093138268 應’沿圓周方向均勻地固定在電路板4上 表單編號A0101 第5頁/共16頁 並將置於電路 0993292467-0 1332117 % _ » 099年08月16日修正替換頁 板4上的影像感測器3包圍其中；在每一第一電磁鐵結構 22a及其對應地第一永久磁體243外圍套裝有一第一彈菁 26a，該第一彈簧26a在鏡座14之外肩146和電路板4之間 呈壓縮或者拉伸狀態。 [0013] 在鏡座14之基座144内部有一圓筒狀内框61固定在電路板 4上’ s亥内框61環繞驅動結構2 ;在鏡座14之基座144外 部有一圓筒狀外框62固定在電路板4上，外框62之上部具 有一内肩622 ’該内肩622位於鏡座14之外肩146之上。 在内框61和外框62靠近鏡座14之基座144表面分別沿周 向均勻地安裝有複數簧片64，簧片64中部朝向基座144突 出。内框61和外框62上之簧片64兩兩相對，分別抵靠在 鏡座14之内表面和外表面，以便#確地限定鏡座14之橫 向位置。 [0014] 當鏡頭模組1之初始狀態設置爲近距離對焦時，鏡座14之 外肩146與外框62之内肩622貼合，第一彈|26a在鏡座 14之外肩146和電路板4之間呈壓縮狀態；當鏡頭模組 初始狀態設置爲遠距離對焦時，鏡座14之外肩146與内框 61貼合’第一彈菁26a在鏡座14之外肩146和電路板4之 間呈拉伸狀態。磁力大小可由第一線圈224a之阻數和通 過該線圈之電流大小確定，其方向由第一永久磁體24a 之磁極方向和通過第一線圈224a之電流方向確定。 [0015] 下面介紹本發明對焦裝置之工作過程： [0016] 第二圖表示鏡頭模組1位於初始之近距離對焦位置。鏡座 14和電路板4之間安裝有複數處於壓縮狀態之第一彈菁 093138268 表單編號A0101 第6頁/共16頁 0993292467-0 26a，每個第一 099年08月16日倐正替换頁. 彈簧26a套裝在對應的第一電磁鐵結構 22a和第一永久磁體24a外圍； :鏡座14受彈簧回復力之作1332117 Aug. 16th, 2010, the replacement page. 6. Description of the Invention: [Technical Field] [0001] The present invention relates to an optical autofocus device, and more particularly to an optical autofocus device for a digital camera. [Prior Art] [0002] The first digital cameras used were fixed-focus lenses, that is, the distance between the lens groups and between the lens group and the image sensor was fixed. 'According to the optical formula l/p + l/q =l/f, the object distance of the shooting target is also fixed. If the position of the shooting target exceeds the range of the object distance preset by the lens, the captured image will become blurred, thus greatly limiting the viewing range. [0003] For the above-mentioned fixed lens, some of the camera solutions are solved. The method is to use a kind of amplification interpolation method to amplify the digital signal. However, only the original smaller area is enlarged, and there is no new information increase, so the utility is not practical. [0004] In contrast, from the principle of the lens, this problem can be solved to a large extent by changing the focal length or image distance of the digital camera lens. When the shooting target is out of the object distance range, a new object distance suitable for the target is obtained by changing the focal length or image distance, thereby ensuring image quality. Of course, the change of focal length or image distance is also limited, and the range of variation is different for different lens groups. [0005] 093138268 As shown in the first figure, the first lens 316 and the second lens 322 are respectively mounted on the outer frame 314 and the magnetic material. In the second circular body 32, a spring 324 is disposed between the outer frame 314 and the second cylinder 320, and a coil 318 is surrounded on the surface of the first cylinder 312 located on the outer frame 314. Powering the coil 318, Form No. A0HU Page 3 / Total 16 Page 0993292467-0 1332117 A magnetic force against the spring 324 is generated between the second cylinder 320 and the coil 318 to drive the second cylinder 320 to move axially. The distance between the first lens 316 and the second lens 322 can be changed to achieve the purpose of focusing. For related patents, reference is made to Chinese Patent Application No. CN1517775A, published on Aug. 4, 2004. [0006] Although the above focusing device can achieve the purpose of automatic focusing, the coil and the driving structure of the spring are disposed between the lens groups, so that the internal structure of the lens is more complicated, which increases the difficulty of production and assembly; The whole or part of the second circular body 320 needs to be made of a high magnetic metal or a magnet, and a lens is also mounted inside, which is inconvenient to manufacture. SUMMARY OF THE INVENTION [0007] An object of the present invention is to provide an optical autofocus device that can perform optical focusing by using a conventional fixed focus lens module and a driving structure, without adding extra space, and can reduce production and address. Difficulty in loading. [0008] In order to solve the above technical problem, the present invention provides an optical autofocus device for a digital camera, comprising a lens module, a driving structure, and an image sensor connected to the circuit board, wherein the lens module is composed of The lens holder and the lens frame of the mounting lens group; the lens holder is stepped, including a lens barrel and a base, the lens barrel is used for mounting the frame, and the base is for accommodating the driving structure, the driving structure comprises an electromagnet structure and is permanent a magnet and a spring; the electromagnet structure and the permanent magnet are fixed on the mirror base or the circuit board, and the other is fixed on the mirror base and the other board; the spring is installed between the mirror base and the circuit board. And in an extended or compressed state; the optical autofocus device further includes two blocking members having different heights in the sleeves to energize the electromagnet structure, and the generated magnetic force drives the lens module to overcome 093138268 Form No. A0101 Page 4 / A total of 16 pages 0993292467-0 1332117 spring recovery force for axial movement 099 years 〇 August 16th, until blocked by the blocking member to stop pressing [0009] due to the invention The optical autofocus device can use the common fixed lens module, and the driving structure for the focus is made inside the lens holder, so that the lens module can be designed without additional space, and the function of autofocus can be realized without adding extra space. [Embodiment] [0010] The autofocus device of the present invention is a two-stage focusing device, which can be used for a lens at a close focus position or a long distance focus position. The invention adopts an electromagnet structure and a spring-driven lens for axial movement to achieve close-range focusing and long-distance pairing of the lens. [0011] Referring to the second figure, the lens module 1 includes a frame 12 and a lens holder 14 The frame 12 is used for mounting a lens set (not shown), and the lens holder 14 is stepped, and is composed of a lens barrel 142, a base 144, and a shoulder 146 connecting the lens barrel 142 and the base 144, wherein the lens barrel 142 The inner diameter is smaller than the inner diameter of the base 144. The frame 12 is nested in the lens barrel 142 of the mirror mount 14 and is assembled by thread or other means. [0012] The driving structure 2 includes a plurality of first electromagnet structures 22a, a plurality of first permanent magnets 24a, and a plurality of first springs 26a, which are the same in number. The first electromagnet structure 22a is composed of a first sensing magnet 222a and a first coil 224a surrounding the first sensing magnet 222a. The upper end of the first sensing magnet 222a is fixed to the outer shoulder 146 of the lens holder 14 by being embedded or ablated. lower surface. The plurality of first electromagnet structures 22a are uniformly fixed to the mirror holder 4 in the circumferential direction, and the plurality of first permanent magnets 24a and the plurality of first electromagnet structures 22a are paired 093138268 uniformly in the circumferential direction on the circuit board 4. The upper form number A0101 page 5 / total 16 pages will be placed in the circuit 0993292467-0 1332117 % _ » August 18, 2017 corrected image replacement panel 4 image sensor 3 surrounded by; in each first electromagnetic The iron structure 22a and its corresponding first permanent magnet 243 are peripherally fitted with a first elastic crystal 26a which is compressed or stretched between the outer shoulder 146 of the lens holder 14 and the circuit board 4. [0013] Inside the base 144 of the lens holder 14, a cylindrical inner frame 61 is fixed on the circuit board 4, and the frame 61 surrounds the driving structure 2; a cylindrical outer portion is external to the base 144 of the lens holder 14. The frame 62 is fixed to the circuit board 4, and the upper portion of the outer frame 62 has an inner shoulder 622 which is located above the shoulder 146 of the lens holder 14. A plurality of reeds 64 are uniformly mounted in the circumferential direction of the inner frame 61 and the outer frame 62 near the surface of the base 144 of the mirror base 14, and the central portion of the reed 64 projects toward the base 144. The inner frame 61 and the reed 64 on the outer frame 62 are opposite each other, respectively abutting against the inner and outer surfaces of the mirror base 14 so as to surely define the lateral position of the lens holder 14. [0014] When the initial state of the lens module 1 is set to close focus, the outer shoulder 146 of the lens holder 14 is engaged with the inner shoulder 622 of the outer frame 62, and the first spring|26a is outside the shoulder 14 of the lens holder 14 and the circuit The plate 4 is in a compressed state; when the initial state of the lens module is set to be far-distance, the outer shoulder 146 of the lens holder 14 is fitted to the inner frame 61. The first elastic cyanium 26a is outside the lens holder 14 and the shoulder 146 and the circuit. The plates 4 are stretched. The magnitude of the magnetic force can be determined by the number of resistances of the first coil 224a and the magnitude of the current through the coil, the direction of which is determined by the direction of the magnetic poles of the first permanent magnet 24a and the direction of current flow through the first coil 224a. [0015] The following describes the operation of the focusing device of the present invention: [0016] The second figure shows that the lens module 1 is located at the initial close focus position. Between the lens holder 14 and the circuit board 4, a plurality of first elastic 093138268 are mounted in a compressed state. Form No. A0101 Page 6 / Total 16 pages 0993292467-0 26a, each of the first 099 August 16th is a replacement page The spring 26a is fitted around the corresponding first electromagnet structure 22a and the first permanent magnet 24a; : the mirror base 14 is subjected to spring restoring force
動鏡頭模組1克服第-彈簧26a之回復力向下運動，直到 鏡座14與内框61貼合後靜止於下限…之位置即可以進 仃遠距離對焦。鏡頭模組丨在驅動結構2的作用下在△ h 範圍内運動，能夠靜止在上限hWTah2兩個位置，因 而可實現近距離和遠距離對焦。 [0017] 當然，鏡頭模組1也可將初始狀態設置在遠距離對焦位置 。鏡座14和電路板4之間的第一弹簧26a處於拉伸狀態， 鏡座14受彈黃回復力之作用貼合於内框η，即位於下限 h2之位置，通過改變電流方向或第一永久磁體24a之磁極 方向使第一電磁鐵結構22a在通電時產生與第一永久磁體 24a相排斥之磁力’從而帶動鏡頭模組1克服第一彈簧 之回復力向上運動’直到鏡座14與外框62貼合後靜止於 上限hi之位置，此時便可進行近距離對焦。 [0018] 以上是本發明自動對焦裝置第一實施例之結構和工作過 程’其驅動結構2爲複數第一電磁鐵結構22a沿圓周方向 岣勻地排布在影像感測器3之外圍。進行對焦時，這些第 一電磁鐵結構22a配合各自對應的永磁鐵24及第一彈簧 26a同時作等效工作，使鏡頭模組1平穩運動，對焦較爲 精確。 [0019] 093138268 但是驅動結構2並不限於上述結構及排布方式’第三圖表 表單編號A0101 第7頁/共16頁 0993292467-0 [0020] [0020] [0021] [0022] 093138268 099年08月16日接正替換頁 不第二電磁鐵結構22b ’該第二電磁鐵結構22b由一筒狀 的第二感磁體222b和一環繞第二感磁體222b之第二線圈 2 2 4 b組成。 第四圖為本發明第二實施例的剖示圖，其採用第三圖所 示的第二電磁鐵結構22b。此驅動結構2包括一第二電磁 鐵結構22b、一環狀第二永久磁體24b以及一第二彈簧 26b。第一感磁體222b之上端以嵌入或枯接等方式固定在 鏡座14之外肩146下表面，第二永久磁體24b正對第二感 磁體222b固定在電路板4上，將影像感測器包圍在其中， 第二彈簧26b套裝在第二線圈224b及第二永久磁體24b之 外圍，在鏡座14之外肩146和電路板4之間可爲壓縮或者 拉伸狀態。 第四圖中設置鏡頭模組1之初始狀態爲遠距離對焦位置， 並且對應地設置第二彈簧26b在鏡座14之外肩146和電路 板4之間爲拉伸狀態，鏡座和内框61貼合。當需要近距 離對焦時，給第二線圈224b通電，産生與第二永久磁體 24b相排斥之磁力F2，鏡頭模組丨向上作軸向運動到達μ 處’即與外框62貼合後停止，實現近距離對焦。也可以 設置鏡頭模組之初始狀態爲近距_焦，其第—電磁鐵 結構22a和第二彈簧26b之狀態佈置以及在需要進行遠距 離對焦時之工作過程和本發明第—實施例類同，此處不 再贅述。 總之，本發明自動對焦裝置之初始狀態無論設置爲近距 離對焦還是遠距離對焦，通過改變電流或磁極等相關參 數都可實現兩段式龍功能，獲得更大取景範圍。採用 表單编號A0101 第8頁/共16頁 0993292467-0 1332117 099年08月16日修正替換頁 此結構，可以使用常用之鏡片模組，不需額外設計，並 且其鏡座也爲常見結構，只需在鏡座内設置一驅動結構 即可實現調焦功能。 [0023] 综上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發明之較佳實施例，舉凡 熟悉本發明技藝之人士，在援依本發明精神所作之等效 修飾或變化，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 [0024] 第一圖係習知自動對焦裝置剖示圖。 [0025] 第二圖係本發明自動對焦裝置第一實施例剖示圖。 [0026] 第三圖係本發明一種電磁鐵結構示意圖。 [0027] 第四圖係本發明自動對焦裝置第二實施例剖示圖。 【主要元件符號說明】 [0028] 鏡頭模組：1 [0029] 第二感磁體：222b [0030] 驅動結構：2 [0031] 第一線圈：224a [0032] 影像感測器：3 [0033] 第二線圈：224b [0034] 電路板：4 [0035] 第一永久磁體：24a 093138268 表單編號A0101 第9頁/共16頁 0993292467-0 1332117 ' [0036] 099年08月16日修正替換頁 鏡架：12 [0037] 第二永久磁體：24b [0038] 鏡座：14 [0039] 第一彈簧：26a [0040] 鏡筒：142 [0041] 第二彈簧：26b [0042] 基座：144 [0043] 内框：61 [0044] 外肩：146 [0045] 外框：62 [0046] 第一電磁鐵結構：22a [0047] 内肩：6 2 2 [0048] 第二電磁鐵結構：22b [0049] 簧片：64 [0050] 第一感磁體：222a 093138268 表單編號A0101 第10頁/共16頁 0993292467-0The movable lens module 1 is moved downward against the restoring force of the first spring 26a until the lens holder 14 is attached to the inner frame 61 and is still at the lower limit... The lens module 运动 moves in the range of Δ h under the action of the driving structure 2, and can stand at two positions of the upper limit hWTah2, thereby enabling close-range and long-distance focusing. [0017] Of course, the lens module 1 can also set the initial state to the distant focus position. The first spring 26a between the lens holder 14 and the circuit board 4 is in a stretched state, and the lens holder 14 is attached to the inner frame η by the elastic restoring force, that is, at the lower limit h2, by changing the current direction or the first The magnetic pole direction of the permanent magnet 24a causes the first electromagnet structure 22a to generate a magnetic force repelling the first permanent magnet 24a when energized, thereby driving the lens module 1 to move upward against the restoring force of the first spring until the lens holder 14 and the outer portion After the frame 62 is attached, it is still at the position of the upper limit hi, and at this time, close focus can be performed. The above is the structure and operation of the first embodiment of the autofocus device of the present invention. The driving structure 2 is such that a plurality of first electromagnet structures 22a are uniformly arranged in the circumferential direction at the periphery of the image sensor 3. When focusing, the first electromagnet structures 22a cooperate with the corresponding permanent magnets 24 and the first springs 26a to perform equivalent operation, so that the lens module 1 moves smoothly and the focus is more accurate. [0019] 093138268 However, the driving structure 2 is not limited to the above-described structure and arrangement method. [Third chart form number A0101 Page 7 / Total 16 pages 0993292467-0 [0020] [0021] [0022] 093138268 099 08 On the 16th, the replacement page is not replaced by the second electromagnet structure 22b. The second electromagnet structure 22b is composed of a cylindrical second magnet 222b and a second coil 2 2 4 b surrounding the second magnet 222b. The fourth figure is a cross-sectional view showing a second embodiment of the present invention, which employs the second electromagnet structure 22b shown in the third figure. The drive structure 2 includes a second electromagnetic iron structure 22b, an annular second permanent magnet 24b, and a second spring 26b. The upper end of the first sensing magnet 222b is fixed to the lower surface of the outer shoulder 146 of the lens holder 14 by being embedded or ablated, and the second permanent magnet 24b is fixed to the second sensing magnet 222b on the circuit board 4, and the image sensor is Surrounded therein, the second spring 26b is fitted around the second coil 224b and the second permanent magnet 24b, and may be in a compressed or stretched state between the shoulder 146 and the circuit board 4 outside the lens holder 14. In the fourth figure, the initial state of the lens module 1 is set to a long-distance focus position, and the second spring 26b is correspondingly disposed between the shoulder 146 of the lens holder 14 and the circuit board 4 in a stretched state, the lens holder and the inner frame. 61 fits. When close focus is required, the second coil 224b is energized to generate a magnetic force F2 that is repulsive with the second permanent magnet 24b, and the lens module 丨 moves axially upward to reach the position of μ, that is, after the outer frame 62 is fitted and stopped. Achieve close focus. It is also possible to set the initial state of the lens module to the near-focus, the state arrangement of the first electromagnet structure 22a and the second spring 26b, and the working process when the long-distance focusing is required, similar to the first embodiment of the present invention, I will not repeat them here. In summary, the initial state of the autofocus device of the present invention can achieve a two-stage dragon function by changing the current or magnetic poles, whether it is set to close focus or long-distance focus, and obtain a larger viewing range. Use form number A0101 Page 8 / Total 16 pages 0993292467-0 1332117 Modified on August 16th, 2008. This structure can be used with common lens modules, no additional design, and its mirror base is also a common structure. The focusing function can be realized by simply setting a driving structure in the lens holder. [0023] In summary, the present invention complies with the requirements of the invention patent, and submits a patent application according to law. It is to be understood that the above-mentioned preferred embodiments of the present invention are intended to be included within the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS [0024] The first figure is a cross-sectional view of a conventional autofocus device. [0025] The second drawing is a cross-sectional view of a first embodiment of the autofocus device of the present invention. The third figure is a schematic view of an electromagnet structure of the present invention. [0027] FIG. 4 is a cross-sectional view showing a second embodiment of the autofocus device of the present invention. [Main component symbol description] [0028] Lens module: 1 [0029] Second magnet: 222b [0030] Drive structure: 2 [0031] First coil: 224a [0032] Image sensor: 3 [0033] Second coil: 224b [0034] Circuit board: 4 [0035] First permanent magnet: 24a 093138268 Form number A0101 Page 9 / Total 16 pages 0993292467-0 1332117 '[0036] Corrected replacement page mirror on August 16, 099 Rack: 12 [0037] Second permanent magnet: 24b [0038] Mirror mount: 14 [0039] First spring: 26a [0040] Lens barrel: 142 [0041] Second spring: 26b [0042] Base: 144 [ 0043] Inner frame: 61 [0044] Outer shoulder: 146 [0045] Frame: 62 [0046] First electromagnet structure: 22a [0047] Inner shoulder: 6 2 2 [0048] Second electromagnet structure: 22b [ 0049] Reed: 64 [0050] First Sensing Magnet: 222a 093138268 Form No. A0101 Page 10 / Total 16 Page 0993292467-0