1300222 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種光讀取頭及光碟驅動裝置。具體而 吕’本發明之技術領域係關於一種光讀取頭以及具備該光 讀取頭之光碟驅動裝置，上述光讀取頭具有物鏡驅動裝 置’其使可動區塊相對於固定區塊向聚焦方向、尋轨方向 及傾斜方向之三個方向動作。 【先前技術】 光碟驅動裝置係對光碟等碟片狀記錄媒體進行資訊信號 之記錄或再生者，於此種光碟驅動裝置上設有光讀取頭， 其向碟片狀記錄媒體之半徑方向移動，且向該碟片狀記錄 媒體照射雷射光。 ° 於光讀取頭上設有物鏡驅動裝置，藉由該物鏡驅動裝 置’使保持於此可動區塊上之物鏡於接離於碟片狀記錄媒 體之記錄面之方向上動作，即於聚焦方向上動作，進行聚 焦调整’並且使物鏡向碟片狀記錄媒體之大致半經方向動 作即向哥軌方向動作，進行尋軌調整，使介以物鏡照射 於碟片狀記錄媒體之雷身+1 & 記錄軌道上。 碟片狀記錄媒體之 焦調整及尋軌調整近年一…進行聚 裝置，心進稱為三軸致動器之物鏡驅動 、一 H、、凋整及尋執調整之兩軸方 亦可使可動區塊傾斜動作於碟片狀記錄媒體之記錄面上: 99535.doc J300222 轉中之碟片狀記錄媒體上產生碟面震動等情形時 ° 故而，於稱為三軸致動器之物鏡驅動裝置中， :動區塊相對於固定區塊可向聚焦方向、尋執方向及傾斜 方向動作，上述傾斜方向係指延伸於切線方向之轴的周繞 方向’上述㈣方向直交於W狀記錄媒體之上述半徑方 向且成為碟片狀記錄媒體之切線方向。1300222 IX. Description of the Invention: [Technical Field] The present invention relates to an optical pickup and a disk drive device. Specifically, the technical field of the present invention relates to an optical pickup having an objective lens driving device that focuses on a movable block with respect to a fixed block, and an optical disk drive device having the optical pickup. Three directions of direction, tracking direction and tilt direction. [Prior Art] The optical disc drive device records or reproduces information signals on a disc-shaped recording medium such as a compact disc. The optical disc drive device is provided with an optical pickup head that moves in the radial direction of the disc-shaped recording medium. And irradiating the disc-shaped recording medium with laser light. The objective lens driving device is disposed on the optical pickup, and the objective lens driving device moves the objective lens held on the movable block in a direction away from the recording surface of the disk-shaped recording medium, that is, in the focusing direction. The upper movement is performed, and the focus adjustment is performed, and the objective lens is moved in the direction of the substantially half-way of the disc-shaped recording medium, that is, in the direction of the track, and the tracking adjustment is performed to illuminate the body of the disc-shaped recording medium with the objective lens +1. & Record on the track. Focus adjustment and tracking adjustment of disc-shaped recording media In recent years, the convergence device, the objective lens drive called the three-axis actuator, the H-axis, the trimming and the seek adjustment can also be moved. The block tilting operation is performed on the recording surface of the disc-shaped recording medium: 99535.doc J300222 When the disc-shaped recording medium in the middle of the disc is subjected to a disk surface vibration or the like, the objective lens driving device called a triaxial actuator is used. The moving block can be moved in the focusing direction, the seeking direction, and the tilting direction with respect to the fixed block, and the tilting direction refers to the circumferential winding direction of the axis extending in the tangential direction. The (four) direction is orthogonal to the W-shaped recording medium. The radial direction is the tangential direction of the disc-shaped recording medium.
作為被稱為三軸致動器之物鏡驅動裝置，先前已開發出 以下類型。 例如，用以保持物鏡之可動區塊介以支持彈簧，以可自 由移動之方式支持於固定區塊上，於可動區塊上設有用以 使可動區塊傾斜動作於固定區塊上之傾斜線圈，於固定區 塊上設有與傾斜線圈位置相對之傾斜磁鐵。此種傾斜線圈 叹置於可動區塊上之類型可稱為動圈型。 於動圈型物鏡驅動装置中，對於配置於可動區塊側之聚 焦凋整用之聚焦線圈、尋執調整用之尋執線圈及傾斜調整 用之傾斜線圈，必須具有分別供給驅動電流之兩根支持彈 簧。因此，可動區塊介以共計六根支持彈簧支持於固定區 塊上。 另一方面，除動圈型以外還有另一種類型之三軸致動 器’其用以保持物鏡之可動區塊介以支持彈簧，以可自由 移動之方式支持於固定區塊上，於固定區塊上設有用以使 可動區塊傾斜動作於固定區塊上之傾斜線圈，位於傾斜線 圈對面之傾斜磁鐵設置於可動區塊上（例如，參照專利文獻 1)。此種傾斜磁鐵設置於可動區塊上之類型可稱為動磁型。 99535.doc 1300222 於動磁型物鏡驅動裝置中，因於可動區塊上設有傾斜磁 鐵’故而與動圈型物鏡驅動裝置相比，其可動區塊之重量 變大’但由於其不需要設置支持彈簧用以將驅動電流供給 •至傾斜線圈，故而與動圈型物鏡驅動裝置相比，具有可降 低零件數量或可簡化組裝作業之優點。 [專利文獻1]曰本專利特開2000-222755號公報 [發明所欲解決之問題] φ 然而’於專利文獻1所揭示之物鏡驅動裝置中，其設置於 了動區塊上之傾斜磁鐵設為單極磁化，設置於固定區塊上 之傾斜線圈之捲軸方向設為聚焦方向，故而可動區塊依據 流向纏繞為角筒狀之傾斜線圈約四分之一部分之驅動電流 與磁鐵磁束之關係，向傾斜方向動作。因此，用以傾斜調 整之傾斜線圈部分將會減少，可能造成靈敏度降低。 、此外，為解決此靈敏度降低之問題，必須使用磁力強之 磁鐵，或向傾斜線圈供給高驅動電流，因此，將會導致物 • 鏡驅動裝置之製造成本提高或消耗電力增大等問題。 進而，若以將捲軸方向作為聚焦方向之方式配置傾斜線 圈，則會造成切線方向上傾斜線圈之配置空間增大，物鏡 驅動裝置於切線方向上增大，因此存在有不利於小型化並 且可動區塊之支持狀態不穩定等缺點。 另一方面，於物鏡驅動裝置中，通常藉由啟動鏡將自光 源出射之雷射光引導至物鏡，上述啟動鏡與碟片狀記錄媒 體方向相對，且於該等間夾有可動區塊。此時，例如，於 物鏡周圍配置有包含線圈或磁鐵等之磁性電路之類型中， 99535.doc 1300222 必須將用以入射至啟動鏡之雷射光光路設定於磁性電路之 下方侧位置’因此物鏡驅動裝置之厚度增加，無法達到薄 型化之目的。尤其，對於用於攜帶型機器之光讀取頭，因 薄型化之要求較高，故而成為阻礙薄型化之重大問題。 因此，本發明之光讀取頭及光碟驅動裝置，其以克服上 述難題且提高物鏡驅動裝置之靈敏度以及小型薄型化為課 題0 【發明内容】 本發明之光讀取頭及光碟驅動裝置為解決上述課題，於 物鏡驅動裝置上設有固定板，其設置於移動基座上；固定 區塊，其配置於該固定板上且相對於移動基座加以固定； 可動區塊，其用以保持物鏡且向聚焦方向、尋軌方向及傾 斜方向動作，上述聚焦方向係相對於固定區塊而接離於碟 片狀A錄媒體之記錄面的方向，上述尋軌方向係碟片狀記 錄媒體之大致半徑方向，上述傾斜方向係延伸於切線方向 之軸的周繞方向，該切線方向直交於碟片狀記錄媒體之上 述半^方向且成為碟片狀記錄媒體之切線方向；複數根支 寺彈汽，其將该可動區塊以相對於固定區塊可移動之方式 ，支持，第1磁性電路，其使可動區塊向上述聚焦方向或 尋執方向動作，以及第2磁性電路，其使可動區塊向上述 J方向動作。该第2磁性電路具備一對傾斜磁鐵，其以N 極與S極位於聚焦方向之方式將兩極磁化且於上述半徑方 向上刀開配置’以及-對傾斜線圈，其分別與該一對傾斜 、裁對向配置且捲軸方向為切線方向；-對傾斜磁鐵設置 99535.doc 1300222 厂動區塊上’一對傾斜線圈設置於固定區塊上，物鏡與 第2磁性電路夹着上述第i磁性電路且於切線方向上互相對 向。 此本發明之光讀取頭及光碟驅動裝置，其可用於傾 斜線圈之傾斜調整的部分得以增加。 [發明之效果] 本兔明之光讀取頭，其特徵在於：具備移動基座，其安 、於碟片枱上且向碟片狀記錄媒體之半徑方向移動，以及 署且供°亥移動基座上之物鏡驅動裝置；且上述物鏡驅動裝 /、備固定挺’其設置於上述移動基座上，固定區塊，其 ;。亥固疋板上所配置之移動基座加以固定，可動區 2動其用以保持物鏡並且向聚焦方向、尋軌方向及傾斜方 /作’上述聚焦方向係相對於固定區塊而接離於碟片狀 體己=體之，錄面的方向’上述尋軌方向係碟片狀記錄媒 的鱗半彷方向，上述傾斜方向係延伸於切線方向之軸 半2 A方向，上述切線方向直交於碟片狀記錄媒體之上述 彈ί方向且成為碟片狀記錄媒體之切線方向，複數根支持 以=其將該可動區塊以相對於固定區塊可移動之 ，寺第1磁性電路，其使可動區塊向上述聚焦方向或者 方向動作，以及第2磁性電路，其使可動區塊向上述傾 盥8搞向動作，该第2磁性電路具備一對傾斜磁鐵，其以1^極 立於聚焦方向之方式將兩極磁化且於 上分開配詈 ·^丁 1工乃同 ，以及一對傾斜線圈，其分別與該一對傾斜磁 鐵對向配置日Μ ά丄+ , 4 Τ ^ 車方向為切線方向；一對傾斜磁鐵設置於 99535.doc 1300222 可動區塊上，一對傾斜線圈設置於固定區塊上，物鏡與第2 磁性電路夾着上述第1磁性電路且於切線方向上互相對向。 因此，由於係以捲軸方向為切線方向之方式配置傾斜線 •圈，故而可用以使可動區塊向傾斜方向產生推力之傾斜線 圈部分增大，可提高傾斜調整時可動區塊之靈敏度。 又由於可提咼可動區塊之靈敏度，故而不再需要使用 =有強磁力之磁鐵，並且無需向傾斜線圈供給高驅動電 机從而可降低物鏡驅動裝置之製造成本且可減少電力消 耗。 、、進而，因傾斜線圈之捲軸方向未作為聚焦方向，故而可 減小切線方向上傾斜線圈之配置空間，可減小物鏡驅動裝 置於切線方向上之尺寸。 進而，由於物鏡與第2磁性電路夾着第丨磁性電路且於切 線方向上互相對向，因此啟動鏡可配置於與第丨磁性電路相 同之高度位置，故而可實現物鏡驅動裝置之薄型化。此種 擧薄型化對於攜帶型機器中所使用之光讀取頭尤其有利。 除此之外’因傾斜磁鐵設置於可動區塊上，傾斜線圈設 固定區塊上，故而可無需用以向傾斜線圈供電之支持 彈簧，從而可減少零件數量及簡化物鏡驅動裝置之組裝性。 由於設有傾斜磁軛，故而無需設置其他專用傾 固疋固定區塊之部分可與傾斜磁軛共用，因此可 零件盤旦· 里，上述傾斜磁軛使上述固定板之一部分彎曲，與 傾斜磁鐵夹着傾斜線圈且於切線方向上互相對向。 因於上述傾斜磁鐵與傾斜線圈相對向面之反面側配置有 99535.doc 1300222 後磁輛，故而於傾斜調整時，可提高可動區塊之靈敏度。 此外’來自傾斜磁鐵之洩露磁束減少，且第2磁性電路難 以爻到第1磁性電路之影響，因此可防止由於磁束洩露影響 而造成可動區塊向固定區塊傾斜。 本發明之光碟驅動裝置，其特徵在於：具備安裝有碟片 狀記錄媒體之碟片枱，以及介以物鏡向安裝於該碟片枱上 之碟片狀挹錄媒體照射雷射光之光讀取頭；該光讀取頭具 參有移動基座，其向安裝於碟片枱上之碟片狀記錄媒體之半 k方向移動，以及物鏡驅動裝置，其配置於該移動基座上； 且上述物鏡驅動裝置具備固定板，其設置於上述移動基座 上’固疋區塊，其配置於該固定板上且相對於移動基座加 以固定，可動區塊，其用以保持物鏡並且向聚焦方向、尋 軌方向及傾斜方向動作，上述聚焦方向係相對於固定區塊 而接離於碟片狀記錄媒體之記錄面的方向，上述尋軌方向 係碟片狀記錄媒體之大致半徑方向，上述傾斜方向係延伸 φ 於切線方向之軸的周繞方向，上述切線方向直交於碟片狀 記錄媒體之上述半徑方向且成為碟片狀記錄媒體之切線方 向’複數根支持彈簧’其將該可動區塊以相對於固定區塊 可移動之方式加以支持，第1磁性電路，其使可動區塊向上 述聚焦方向或者尋軌方向動作，以及第2磁性電路，其使可 動區塊向上述傾斜方向動作；該第2磁性電路具備一對傾斜 磁鐵’其以N極與S極位於聚焦方向之方式將兩極磁化且於 上述半徑方向上分開配置，以及一對傾斜線圈，其分別與 該一對傾斜磁鐵對向配置且捲軸方向為切線方向；一對傾 99535.doc -12- 1300222 斜磁鐵設置於可動區塊上，一對傾斜線圈設置於固定區塊 上’物鏡與第2磁性電路夾着上述第！磁性電路且於切線方 向上互相對向。 因此’由於係以捲軸方向即為切線方向之方式配置有傾 斜線圈，故而可用以使可動區塊向傾斜方向產生推力之傾 斜線圈部分增大，可於傾斜調整時提高可動區塊之靈敏度。 又，由於可提高可動區塊之靈敏度，故而不再需要使用 φ 具有強磁力之磁鐵，並且無需向傾斜線圈供給高驅動電 流，從而可降低物鏡驅動裝置之製造成本且減少電力消耗。 再者，因傾斜線圈之捲軸方向未作為聚焦方向，故而可 減小切線方向上傾斜線圈之配置空間，可減小物鏡驅動裝 置於切線方向上之尺寸。 進而，由於物鏡與第2磁性電路夾着第1磁性電路且於切 線方向上互相對向，因此啟動鏡可配置於與第丨磁性電路相 同之高度位置，故而可實現物鏡驅動裝置之薄型化。此種 • 薄型化對於攜帶型光碟驅動裝置尤其有利。 除此以外，因傾斜磁鐵設置於可動區塊上，傾斜線圈設 ^於固疋區塊上，故而無需用以向傾斜線圈供電之支持彈 貝攸而可減少零件數量及簡化物鏡驅動裝置之組裝性。 由於设有傾斜磁輛，故而無需設置其他專用傾斜磁輕， 用乂 口疋固疋區塊之部分與傾斜磁軛可共用，因此可減少 零件數量；上述傾斜磁軛使上述固定板之一部分彎曲，與 傾斜磁鐵夾着傾斜線圈且於切線方向上互相對向。 因於上述傾斜磁鐵與傾斜線圈相對向面之反面側配置有 99535.doc 13 1300222 後磁軛，故而於傾斜調整時，可提高可動區塊之靈敏度。 此外，來自傾斜磁鐵之洩露磁束減少，第2磁性電路難以 受到第1磁性電路之影響，因此可防止由於磁束洩露影響而 -造成可動區塊向固定區塊傾斜。 【實施方式】 以下參照附圖，說明本發明之光讀取頭及光碟驅動裝置 之最佳形態。 _ 光碟驅動裝置1係於外框2内配置有所需之各種構件及各 種機構（參照圖丨），外框2中形成有未圖示之碟片插入口。 外框2内配置有未圖示之底盤，安裝於該底盤上之主軸馬 達之馬達軸上固定有碟片枱3。 底盤上安裝有平行之導引軸4、4,並且支持有藉由未圖 示之傳送馬達而旋轉之引導螺桿5。 光讀取頭6具有移動基座7、設置於該移動基座7上之所需 光學零件及配置於移動基座7上之物鏡驅動裝置8,設置於 • 移動基座7兩端部之軸承部7a、％分別以可自由滑動之方式 支持於各個導引軸4、4上。 於移動基座7上設有未圖示之螺母構件，其與引導螺桿$ 螺合，若引導螺桿5藉由傳送馬達旋轉時，螺母構件將向與 引導螺桿5之旋轉方向㈣應之方向傳送，光讀取頭6向安 裝於碟片枱3上之碟片狀記錄媒體1〇〇的半徑方向移動。 物鏡驅動裝置8具有基座構件9、固定板1〇、固定區塊^ 及相對於該固定區塊11動作之可動區塊i 2 (參照圖2及圖3)。 基座構件9為磁性金屬材料’例如，可由spcc(冷軋鋼板） 99535.doc •14· 1300222 或矽鋼板等形成，如圖2所示，其包含固定於移動基座7上 之基座部9a及自該基座部9a分別彎曲為直角之磁軛部9b、 9b。磁軛部9b、9b於前後方向，即於碟片狀記錄媒體1〇〇之 切線方向（TAN)上隔開設置。 於磁輛部9b、9b相互對向之面上，分別安裝有磁鐵13、 13 ° 固定板10於切線方向（後方）上與基座構件9分開設置，固 定於移動基座7上。固定板1〇為磁性金屬材料，例如，可由 spcc(冷軋鋼板）或矽鋼板等形成，具有固定於移動基座7 上之板基座10a以及傾斜磁輛10b、1〇b，該傾斜磁軛i〇b、 i〇b自該板基座10a之前端部彎曲且於碟片狀記錄媒體ι〇〇 之半徑方向（RAD)上分開設置。 固定區塊11固定於固定板10之板基座1〇a上，固定區塊u 之後面設有於其左右兩端部上下分開設置之共計四個端子 部1U、Ua、…（參照圖4及圖5)。 於固定區塊11之下端部設有自其後面向後方突出之端子 插腳m、m(參照圖4)，該端子插腳Ub、m左右分開咬As an objective lens driving device called a three-axis actuator, the following types have been developed. For example, the movable block for holding the objective lens is supported by the support spring in a freely movable manner, and the movable block is provided with a tilt coil for tilting the movable block on the fixed block. An inclined magnet is disposed on the fixed block opposite to the position of the tilt coil. The type in which such a tilt coil is placed on a movable block can be referred to as a moving coil type. In the moving-coil type objective lens driving device, it is necessary to supply two of the drive currents to the focus coil for focusing and focusing on the movable block side, the seek coil for seek adjustment, and the tilt coil for tilt adjustment. Support springs. Therefore, the movable block is supported on the fixed block by a total of six support springs. On the other hand, in addition to the moving coil type, there is another type of three-axis actuator that holds the movable block of the objective lens to support the spring and is freely movable to support the fixed block for fixing. The block is provided with a tilt coil for tilting the movable block on the fixed block, and the tilt magnet located opposite the tilt coil is provided on the movable block (for example, refer to Patent Document 1). The type in which such a tilt magnet is disposed on the movable block may be referred to as a moving magnetic type. 99535.doc 1300222 In the moving magnet type objective lens driving device, since the tilting magnet is provided on the movable block, the weight of the movable block becomes larger than that of the moving coil type objective lens driving device, but since it does not need to be set The support spring is used to supply the drive current to the tilt coil, so that it has the advantage of reducing the number of parts or simplifying assembly work compared to the moving coil type objective lens drive. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2000-222755 (Problem to be Solved by the Invention) φ However, in the objective lens driving device disclosed in Patent Document 1, the inclined magnet provided on the movable block is provided. For unipolar magnetization, the direction of the reel of the tilt coil disposed on the fixed block is set to the focus direction, so that the movable block is wound into a quarter-turn drive current of the angular cylinder and the magnetic flux of the magnet according to the flow direction. Relationship, moving in the direction of the tilt. Therefore, the portion of the tilt coil used for tilt adjustment will be reduced, which may cause a decrease in sensitivity. Further, in order to solve the problem of the sensitivity reduction, it is necessary to use a magnet having a strong magnetic force or to supply a high drive current to the tilt coil, which causes problems such as an increase in the manufacturing cost of the mirror driving device or an increase in power consumption. Further, when the tilt coil is disposed such that the reel direction is the focus direction, the arrangement space of the tilt coil in the tangential direction is increased, and the objective lens driving device is increased in the tangential direction, so that it is disadvantageous for miniaturization and the movable area The shortcomings of the block's support state are unstable. On the other hand, in the objective lens driving device, the laser beam emitted from the light source is usually guided to the objective lens by the start mirror, and the starter mirror faces the disk-shaped recording medium in the direction in which the movable block is sandwiched. In this case, for example, in a type in which a magnetic circuit including a coil or a magnet is disposed around the objective lens, the 99535.doc 1300222 must set the optical path of the laser light incident on the starter mirror to the lower side of the magnetic circuit. The thickness of the device is increased, and the purpose of thinning cannot be achieved. In particular, since the optical pickup head for a portable type device has a high requirement for thinning, it is a major problem that hinders thinning. Therefore, the optical pickup and the optical disk drive device of the present invention solve the above problems and improve the sensitivity of the objective lens driving device and the reduction in size and thickness. [Invention] The optical pickup and the optical disk drive device of the present invention are solved. In the above problem, the objective lens driving device is provided with a fixing plate which is disposed on the moving base, a fixing block disposed on the fixing plate and fixed relative to the moving base, and a movable block for holding the objective lens. And moving in a focus direction, a tracking direction, and an oblique direction, wherein the focus direction is a direction away from a recording surface of the disc-shaped A-recording medium with respect to the fixed block, and the tracking direction is substantially a disc-shaped recording medium. In the radial direction, the oblique direction is a circumferential winding direction of the axis extending in the tangential direction, and the tangential direction is orthogonal to the half direction of the disc-shaped recording medium and becomes a tangential direction of the disc-shaped recording medium; Supporting the movable block in a movable manner relative to the fixed block, the first magnetic circuit that causes the movable block to move toward the focus direction or The seek direction operation and the second magnetic circuit operate the movable block in the J direction. The second magnetic circuit includes a pair of tilt magnets that magnetize the two poles so that the N pole and the S pole are in the focus direction, and are disposed in the radial direction in the radial direction, and the pair of tilt coils are tilted with the pair. Cut the opposite direction and the direction of the reel is tangential direction; - Set the tilt magnet to 99535.doc 1300222 On the factory block, a pair of tilt coils are placed on the fixed block, and the objective lens and the second magnetic circuit sandwich the above i-th magnetic circuit And they oppose each other in the tangential direction. The optical pickup head and the optical disk drive device of the present invention can be used to increase the portion of the tilt adjustment of the tilt coil. [Effect of the Invention] The optical reading head of the present invention is characterized in that it has a moving base which is mounted on the disc table and moves in the radial direction of the disc-shaped recording medium, and is provided for the mobile base. The objective lens driving device on the seat; and the objective lens driving device is mounted on the moving base, and the fixing block is fixed. The movable base disposed on the slab is fixed, and the movable area 2 is moved to hold the objective lens and is separated from the fixed block by the focus direction, the tracking direction and the tilting direction. The disc-shaped body has a body, and the direction of the recording surface is the semi-imitation direction of the disc-shaped recording medium, and the oblique direction extends in the 2A direction of the axis half of the tangential direction, and the tangential direction is orthogonal to The above-mentioned elastic direction of the disc-shaped recording medium becomes the tangential direction of the disc-shaped recording medium, and the plurality of roots support the movable circuit block to be movable relative to the fixed block, and the temple first magnetic circuit enables The movable block operates in the focus direction or direction, and the second magnetic circuit causes the movable block to move toward the tilting head 8. The second magnetic circuit includes a pair of tilting magnets that are positioned in focus The direction of the magnetization of the two poles is separately arranged on the upper side, and the pair of tilting coils are respectively arranged opposite to the pair of tilting magnets, and the direction of the vehicle is tangent Direction A magnet disposed in the movable block 99535.doc 1300222, the pair of tilt coils disposed on the fixing block, the objective lens and the second magnetic circuits sandwiching the first magnetic circuit and facing each other in the tangential direction. Therefore, since the inclined line/ring is disposed such that the reel direction is the tangential direction, the inclined coil portion for causing the movable block to generate the thrust in the oblique direction can be increased, and the sensitivity of the movable block at the time of tilt adjustment can be improved. Further, since the sensitivity of the movable block can be improved, it is no longer necessary to use a magnet having a strong magnetic force, and it is not necessary to supply a high-drive motor to the tilt coil, thereby reducing the manufacturing cost of the objective lens driving device and reducing power consumption. Further, since the direction of the reel of the tilt coil is not the focus direction, the arrangement space of the tilt coil in the tangential direction can be reduced, and the size of the objective lens driving device in the tangential direction can be reduced. Further, since the objective lens and the second magnetic circuit are opposed to each other in the tangential direction with the second magnetic circuit interposed therebetween, the start mirror can be disposed at the same height position as the second magnetic circuit, so that the objective lens driving device can be made thinner. Such thinning is particularly advantageous for optical pickups used in portable machines. In addition, since the tilting magnet is disposed on the movable block and the tilting coil is disposed on the fixed block, the supporting spring for supplying power to the tilting coil can be eliminated, thereby reducing the number of parts and simplifying the assembly of the objective lens driving device. Since the inclined yoke is provided, it is not necessary to provide a portion of the special tilting and fixing block to be shared with the tilting yoke, so that the tilting yoke can partially bend one of the fixing plates and the tilting magnet. The tilt coils are sandwiched and oppose each other in the tangential direction. Since the 99535.doc 1300222 rear magnetic field is disposed on the opposite side of the opposing surface of the tilt magnet and the tilt coil, the sensitivity of the movable block can be improved when the tilt adjustment is performed. Further, the leakage magnetic flux from the tilt magnet is reduced, and the second magnetic circuit is less likely to be affected by the first magnetic circuit. Therefore, it is possible to prevent the movable block from tilting toward the fixed block due to the influence of the magnetic flux leakage. The optical disk drive device of the present invention is characterized in that it comprises a disk table on which a disk-shaped recording medium is mounted, and a light reading of the laser light irradiated to the disk-shaped recording medium mounted on the disk table by the objective lens. a head; the optical pickup head is provided with a moving base that moves in a half k direction of the disc-shaped recording medium mounted on the disc table, and an objective lens driving device disposed on the moving base; The objective lens driving device is provided with a fixing plate, which is disposed on the moving base, and is fixed on the fixing plate and fixed relative to the moving base. The movable block is used for holding the objective lens and focusing direction. a direction of tracking and a direction of tilting, wherein the focusing direction is a direction away from a recording surface of the disc-shaped recording medium with respect to the fixed block, wherein the tracking direction is a substantially radial direction of the disc-shaped recording medium, and the tilting The direction extends φ in a circumferential direction of the axis of the tangential direction, and the tangential direction is orthogonal to the radial direction of the disc-shaped recording medium and becomes a tangential direction of the disc-shaped recording medium. a plurality of support springs that support the movable block in a movable manner relative to the fixed block, the first magnetic circuit that moves the movable block toward the focus direction or the tracking direction, and the second magnetic circuit, The second magnetic circuit includes a pair of inclined magnets that magnetize the two poles so as to be in the focusing direction so that the N pole and the S pole are in the focusing direction, and are disposed apart from each other in the radial direction, and a pair of tilts a coil, which is disposed opposite to the pair of tilting magnets and has a tangential direction of the reel; a pair of tilting 95535.doc -12-1300222 oblique magnets are disposed on the movable block, and a pair of tilting coils are disposed on the fixed block' The objective lens and the second magnetic circuit sandwich the above! The magnetic circuits are opposite each other in the tangential direction. Therefore, since the tilt coil is disposed such that the spool direction is the tangential direction, the tilt coil portion for causing the movable block to generate the thrust in the oblique direction can be increased, and the sensitivity of the movable block can be improved during the tilt adjustment. Further, since the sensitivity of the movable block can be improved, it is no longer necessary to use a magnet having a strong magnetic force, and it is not necessary to supply a high drive current to the tilt coil, thereby reducing the manufacturing cost of the objective lens driving device and reducing power consumption. Further, since the direction of the reel of the tilt coil is not the focus direction, the arrangement space of the tilt coil in the tangential direction can be reduced, and the size of the objective lens driving device in the tangential direction can be reduced. Further, since the objective lens and the second magnetic circuit are opposed to each other in the tangential direction with the first magnetic circuit interposed therebetween, the starter mirror can be disposed at the same height position as the second magnetic circuit, so that the objective lens driving device can be made thinner. This type of thinning is particularly advantageous for portable optical disc drives. In addition, since the tilting magnet is disposed on the movable block, the tilting coil is disposed on the solid block, so that the supporting bobbin for supplying power to the tilting coil is eliminated, the number of parts can be reduced, and the assembly of the objective lens driving device can be simplified. Sex. Since the tilting magnetic vehicle is provided, it is not necessary to provide other dedicated tilting magnetic light, and the portion of the tamping block can be shared with the tilt yoke, so that the number of parts can be reduced; the tilting yoke bends one of the fixing plates And the tilting magnets sandwich the tilting coils and oppose each other in the tangential direction. Since the 99535.doc 13 1300222 rear yoke is disposed on the opposite side of the opposing surface of the tilt magnet and the tilt coil, the sensitivity of the movable block can be improved when the tilt is adjusted. Further, since the leakage magnetic flux from the tilt magnet is reduced, the second magnetic circuit is hardly affected by the first magnetic circuit, so that it is possible to prevent the movable block from tilting toward the fixed block due to the influence of the magnetic flux leakage. [Embodiment] Hereinafter, the best mode of the optical pickup and the optical disk drive device of the present invention will be described with reference to the accompanying drawings. The optical disk drive device 1 is provided with various components and various mechanisms (see FIG. 所需) required in the outer frame 2, and a disk insertion opening (not shown) is formed in the outer frame 2. A chassis (not shown) is disposed in the outer frame 2, and the disk table 3 is fixed to the motor shaft of the spindle motor mounted on the chassis. Parallel guide shafts 4, 4 are mounted on the chassis, and a lead screw 5 that is rotated by a transfer motor not shown is supported. The optical pickup 6 has a moving base 7, a required optical component provided on the moving base 7, and an objective lens driving device 8 disposed on the moving base 7, and bearings disposed at both ends of the moving base 7. The portions 7a, % are respectively supported on the respective guide shafts 4, 4 in a freely slidable manner. A nut member (not shown) is provided on the moving base 7, and is screwed to the lead screw. When the lead screw 5 is rotated by the transport motor, the nut member is transferred in the direction of rotation (4) of the lead screw 5. The optical pickup 6 is moved in the radial direction of the disk-shaped recording medium 1A mounted on the disk table 3. The objective lens driving device 8 has a base member 9, a fixed plate 1A, a fixed block, and a movable block i 2 that operates with respect to the fixed block 11 (see Figs. 2 and 3). The base member 9 is a magnetic metal material 'for example, may be formed of spcc (cold rolled steel plate) 99535.doc • 14· 1300222 or a ruthenium plate or the like, as shown in FIG. 2, and includes a base portion fixed to the moving base 7. 9a and yoke portions 9b and 9b which are bent at right angles from the base portion 9a, respectively. The yoke portions 9b and 9b are spaced apart from each other in the front-rear direction, that is, in the tangential direction (TAN) of the disc-shaped recording medium 1〇〇. Magnets 13 and 13 are attached to the surfaces of the magnetic vehicle portions 9b and 9b, respectively. The fixing plate 10 is provided separately from the base member 9 in the tangential direction (rear), and is fixed to the moving base 7. The fixing plate 1 is made of a magnetic metal material, for example, spcc (cold-rolled steel plate) or stencil steel plate or the like, and has a plate base 10a fixed to the moving base 7, and tilting magnets 10b, 1b, which are inclined magnetic The yokes i, b, i 〇 b are bent from the front end of the board base 10a and are provided separately in the radial direction (RAD) of the disc-shaped recording medium. The fixed block 11 is fixed on the plate base 1〇a of the fixed plate 10, and the rear surface of the fixed block u is provided with a total of four terminal portions 1U, Ua, ... which are vertically spaced apart at the left and right end portions thereof (refer to FIG. 4). And Figure 5). At the lower end of the fixed block 11, terminal pins m, m (refer to FIG. 4) protruding rearward from the rear surface are provided, and the terminal pins Ub and m are bitten apart.
置。 X 於固定區塊11之前面部設有向前方突出之定位突部 11c、11c，其左右分開設置（參照圖6)。 於固疋區塊11之後面，安裝有中繼基板"（參照圖4)。中 繼基板14包含位於中央部位之基部14a及自該基部l4a向左 右突出之四個連接部L ^ 工 及拱414b、14b、...。中繼基板14之連接部 14b、14b、…之久論各山如从.# 谷則、部猎由例如焊錫15、15、···連接於 99535.doc 1300222 各個端子部lla、lla、...。 於固定區塊11之前面，安裝有一對傾斜線圈i6、i6，其 左右分開設置’即於碟片狀記錄媒體剛之半徑方向上分開 - T置（參照圖3及圖6)。傾斜線圈心16如圖6所示，藉由外 嵌至於各個固定區塊U前面部所設置之定位突部Uc、 lie，從而安裝㈣定區塊11±。因此，藉由於固定區塊n 上设有定位突部lie、lie ’可容易地進行傾斜線圈16、 _ 相對於固定區塊11的定位及安裝。 傾斜線圈16、16形成為厚度較薄之大致角筒狀，以捲軸 方向為前後方向’即捲軸方向為切線方向之方式，安裝於 固定區塊11上。傾斜線圈16、16中分別位於其上下位置之 部分16a、16a、…係對於可動區塊12向傾斜方向產生推力 的。P匀。另外，傾斜方向係碟片狀記錄媒體丨〇〇之碟面震動 方向（如圖3所示之R方向），即以延伸於切線方向之轴為中 心旋轉的方向。 • 傾斜線圈16、16之各一端部捲繞安裝於固定區塊11後面 上所設置之端子插腳11b、1113上（參照圖4)。 安裝於固定區塊11後面之中繼基板14上，安裝連接有供 電用基板17，其連接於未圖示之電源電路上（參照圖4及圖 5)。供電用基板1 7例如係可撓性印刷電路板，具有四條連 接線17a、17a、…及兩條連接線17b、17b。連接線丨以、17心... 藉由例如焊錫18、18、…分別連接於中繼基板14之連接部 14b、14b、···；連接線i7b、i7b藉由例如焊錫19、19分別 連接於端子插腳11b、llb上所安裝之傾斜線圈16、16的各 99535.doc -16- 1300222 -端部。因此，傾斜調整用之驅動電流自電源電路介以供 電用基板17之連接線171>、17b，供給至傾斜線圈16、16。、 以如此之方式，由於傾斜線圈16、16之各一端部捲繞於 端子插腳lib、llbJl ’傾斜線圈16、16之各—端部與連接 線17b、17b藉由焊錫19、19加以固定，因此易於連接供電 用基板17與傾斜線圈16、16，從而可簡化供電用基板p與 傾斜線圈16、16之連接作業且可提高連接之可靠性。” • 於固定區塊11之靠近前端位置處，形成有上下延伸之磁 軛配置孔lld、lld(參照圖6及圖7)，各個固定板1〇之傾斜磁 軛10b、10b自下方插入配置於該磁輛配置孔Ud、iid中。 傾斜磁軛l〇b、i〇b分別位於傾斜線圈16、16之正後側（參照 圖8) 〇 支持彈簧20、20、…之各個後端部分別連接於固定區塊 11之子。p 11 a、11 a、···（參照圖3及圖4)，該支持彈簧、 2〇、···介以端子部lla、lla、…及中繼基板14之各個連接部 • 14b 、··· ’連接至供電用基板17之各個連接線pa、 17a、···。支持彈簧20、20、…自固定區塊n向前方突出。 可動區塊12具有可動支架21及於該可動支架21上所保持 之物鏡22(參照圖3至圖5)。 可動支架21由透鏡安裝部23及設置於該透鏡安裝部23後 侧之線圈保持部24—體形成。 於透鏡安裝部23上，形成有上下貫通之透過孔23a(參照 圖7) ’物鏡22以自上側覆蓋該透過孔23a之方式得以安裝。 線圈保持部24形成為上下貫通之大致矩形之框狀，聚焦 99535.doc 17 1300222 線圈25及尋軌線圈26、26保持於線圈保持部24之内側。 聚焦線圈25係用以使可動區塊12於聚焦方向，即於接離 於碟片狀記錄媒體1〇〇之方向（如圖3所示之F方向）上動作 之線圈；尋軌線圈26、26係用以使可動區塊12於尋執方向， 即於碟片狀記錄媒體1〇〇之大致半徑方向（如圖3所示之τ方 向）上動作之線圈。 聚焦線圈25及尋執線圈26、26分別捲繞成大致角筒狀， 籲聚焦線圈25之捲軸方向設為上下方向（聚焦方向），尋軌線圈 26、26之捲軸方向設為前後方向（切線方向）。尋執線圈％、 %於聚焦線圈25之前面分設於左右兩側。 聚焦線圈25及尋執線圈26、26之各端部分別與設置於可 動支架21兩側面之連接端子部2U、2U、…相連接。於連 接端子部2la、2la、…上，分別連接有支持彈簧2〇、2〇、… 之各前端部。因此，可動區塊12藉由支持彈簧2〇、2〇、… 與固定區塊11連結且保持為中空。 於物鏡驅動裝置8中，如上所述，可動區塊12藉由支持彈 簧2〇、20、...，相對於固定區仙保持為中空狀態，例如， 於可動區塊12向作為聚焦方向之上下方向動作時，如圖9所 示’可動區塊!2由於自重而向下移動，形成支持彈簧2〇、 2〇、…之前端部位於後端部下方之弯曲狀態。於物鏡驅動 裝置8中，將可動區塊12由於此自重向下移動之位置設定為 可動區塊口之聚焦方向上之中立位置。因&，於聚焦方向 上之中立位置處，如圖9所示，傾斜磁鐵29、29之上下方向 的中央’即磁極之間的中立細與傾斜線圈二“之上下 99535.doc -18- 1300222 方向的中央M2重合。 一 以如此之方式，藉由將考慮到可動區塊12之自重因素之 位置設定為聚焦方向上之中立位置，伴隨可動區塊12之聚 焦動作而產生的傾斜特性變化呈上下對稱，因此可提高物 鏡驅動裝置8之傾斜動作之可靠性。 另外，於聚焦方向並非上下方向之狀態下使用物鏡驅動 裝置8時，例如，於可動區塊12上施以聚焦伺服之狀態下， • 可將供給至聚焦線圈25之驅動電流為〇時的位置設定為可 動區塊12之聚焦方向上之中立位置。 聚焦調整用或尋執調整用之驅動電流自電源電路介以供 電用基板17之各個連接線17a、17a、…及中繼基板^之各 個連接部14b、14b、…，供給至支持彈簧2〇、2〇、…。因 此，支持彈簧20、20、.··中每兩根分別作為肖聚焦、線圈乃 及尋執線圈26、26供電之構件發揮功能。 於聚焦線圈25之前側部分與尋執線圈26、％之前後兩 • 側，分別配置有安裝於磁軛部9b、9b上之磁鐵13、13(參照 圖8)。以如此之方式，藉由配置有磁鐵13、13，可構成第1 磁性電路27，其藉由磁鐵13、13，磁軛部外、外，聚焦線 圈25及尋執線圈26、26，使可動區塊12向聚焦方向或尋軌 方向動作。 於可動支架21之線圈保持部24後面部上，後磁㈣、μ 及傾斜磁鐵29、29分設左右且呈重疊狀態（參照圖2及圖3)。 傾斜磁鐵29、29如圖2所示，以1^極291293與8極2外、2外 分設於聚焦方向之方式使兩極磁化。 99535.doc 1300222 傾斜磁鐵29、29與分別安裝於固定區塊^前面之傾斜線 圈16、16對向設置（參照圖8)。以如此之方式，藉由傾斜磁 鐵29、29與傾斜線圈16、16互相對向，可構成第2磁性電路 30，其藉由傾斜磁鐵29、29，後磁軛28、28，傾斜線圈16、 16以及傾斜磁軛l〇b、10b，使可動區塊12向傾斜方向動作。 若驅動電流自電源電路介以供電用基板17、中繼基板Μ 及支持彈簣20、20、…，供給至聚焦線圈25或尋執線圈％、 26時，依據該等驅動電流之方向與藉由磁鐵13、13及磁軛 部9b、9b所產生之磁束方向的關係，使可動區塊12於聚焦 方向（如圖3所示之F方向）或者尋執方向（如圖3所示之丁方 向）上移動。 又，右驅動電流自電源電路介以供電用基板丨7供給至傾 斜線圈16、16時， 依據該等驅動電流之方向與藉由後磁軛Set. The front surface of the fixed block 11 is provided with positioning projections 11c and 11c which protrude forward, and are disposed apart from each other (see Fig. 6). A relay substrate " is attached to the rear surface of the solid block 11 (see Fig. 4). The relay substrate 14 includes a base portion 14a at a central portion and four connecting portions L^ and 414b, 14b, ... projecting leftward and rightward from the base portion 14a. The connection portions 14b, 14b, ... of the relay substrate 14 are each connected to the terminal portions 11a, 11a, ll. .. A pair of tilt coils i6 and i6 are attached to the front surface of the fixed block 11, and are disposed apart from each other on the left and right sides, i.e., in the radial direction of the disc-shaped recording medium, which is separated by -T (see Figs. 3 and 6). As shown in Fig. 6, the inclined coil core 16 is fitted with the positioning projections Uc, lie provided at the front portions of the respective fixed blocks U, thereby mounting (4) the fixed block 11±. Therefore, the positioning and mounting of the tilt coils 16 and _ relative to the fixed block 11 can be easily performed by providing the positioning projections lie, lie ' on the fixed block n. The slanting coils 16 and 16 are formed in a substantially angular cylindrical shape having a small thickness, and are attached to the fixed block 11 so that the reel direction is the tangential direction, that is, the reel direction is a tangential direction. The portions 16a, 16a, ... of the tilt coils 16, 16 respectively located at the upper and lower positions thereof generate thrust for the movable block 12 in the oblique direction. P evenly. Further, the tilt direction is the direction of the disk surface vibration of the disk-shaped recording medium (in the R direction shown in Fig. 3), that is, the direction in which the axis extending in the tangential direction is centered. • One end portion of the tilt coils 16 and 16 is wound around the terminal pins 11b and 1113 provided on the rear side of the fixed block 11 (see Fig. 4). The power-receiving substrate 17 is attached to the relay substrate 14 mounted on the rear surface of the fixed block 11, and is connected to a power supply circuit (not shown) (see Figs. 4 and 5). The power supply substrate 1 7 is, for example, a flexible printed circuit board, and has four connecting wires 17a, 17a, ... and two connecting wires 17b, 17b. The connecting wires 、, 17 cores... are connected to the connecting portions 14b, 14b, ... of the relay substrate 14 by solders 18, 18, ..., respectively; the connecting wires i7b, i7b are respectively soldered, for example, 19, 19 Each of the 95535.doc -16-1300222 - ends of the tilt coils 16 and 16 mounted on the terminal pins 11b, 11b is connected. Therefore, the drive current for the tilt adjustment is supplied from the power supply circuit to the tilt coils 16 and 16 via the connection lines 171 > 17b of the power supply substrate 17. In this manner, the end portions of the tilt coils 16 and 16 are wound around the terminal pins lib and 11bJ1. The respective end portions of the tilt coils 16 and 16 and the connecting wires 17b and 17b are fixed by solders 19 and 19, Therefore, it is easy to connect the power supply substrate 17 and the tilt coils 16 and 16, and the connection work between the power supply substrate p and the tilt coils 16 and 16 can be simplified, and the reliability of the connection can be improved. Between the front end of the fixed block 11 and the yoke arrangement holes 11d and 11d extending upward (see FIGS. 6 and 7), the tilt yokes 10b and 10b of the respective fixing plates 1 are inserted from below. In the magnetic vehicle arrangement holes Ud, iid, the inclined yokes l〇b, i〇b are located on the front rear side of the tilt coils 16, 16 (refer to FIG. 8), and the respective rear end portions of the support springs 20, 20, ... Do not connect to the child of the fixed block 11. p 11 a, 11 a, (refer to Fig. 3 and Fig. 4), the support spring, 2〇, ··· are connected to the terminal portions 11a, 11a, ... and relay Each of the connection portions 14b, 14B of the substrate 14 is connected to each of the connection lines pa, 17a, ... of the power supply substrate 17. The support springs 20, 20, ... protrude forward from the fixed block n. 12 includes a movable holder 21 and an objective lens 22 (see FIGS. 3 to 5) held by the movable holder 21. The movable holder 21 includes a lens attachment portion 23 and a coil holding portion 24 provided on the rear side of the lens attachment portion 23. The lens mounting portion 23 is formed with a through hole 23a that penetrates vertically (see FIG. 7). The objective lens 22 is covered from the upper side. The coil holding portion 24 is formed in a substantially rectangular frame shape that penetrates vertically, and the focus 95535.doc 17 1300222 coil 25 and the tracking coils 26 and 26 are held inside the coil holding portion 24. 25 is a coil for moving the movable block 12 in the focusing direction, that is, in a direction away from the disc-shaped recording medium 1 (in the F direction shown in FIG. 3); the tracking coils 26 and 26 are The coil for operating the movable block 12 in the seek direction, that is, in the substantially radial direction of the disc-shaped recording medium 1 (the τ direction shown in FIG. 3). The focus coil 25 and the seek coil 26, 26 is wound into a substantially rectangular tube shape, and the direction of the reel of the focus coil 25 is set to the up-and-down direction (focus direction), and the direction of the reel of the tracking coils 26 and 26 is set to the front-rear direction (tangential direction). The search coil %, % The front surface of the focus coil 25 is divided into left and right sides. The respective ends of the focus coil 25 and the seek coils 26 and 26 are respectively connected to the connection terminal portions 2U, 2U, ... provided on both sides of the movable holder 21. Terminal parts 2la, 2la, ... The front end portions of the support springs 2, 2, ... are not connected. Therefore, the movable block 12 is coupled to the fixed block 11 by the support springs 2, 2, ..., and is kept hollow. As described above, the movable block 12 is kept in a hollow state with respect to the fixed area by the support springs 2, 20, ..., for example, when the movable block 12 is moved upward and downward as a focus direction, As shown in Fig. 9, the movable block! 2 moves downward due to its own weight, forming a curved state in which the front ends of the support springs 2, 2, ... are located below the rear end portion. In the objective lens driving device 8, the position at which the movable block 12 is moved downward by this self-weight is set as the neutral position in the focus direction of the movable block port. Because of &, at the neutral position in the focus direction, as shown in Fig. 9, the center of the upper and lower directions of the tilting magnets 29, 29, that is, the neutral thin and the inclined coil between the magnetic poles are "above the upper 95535.doc -18- The center M2 of the direction of the 1300222 coincides. In such a manner, by setting the position considering the self-weight factor of the movable block 12 to the neutral position in the focus direction, the tilt characteristic change accompanying the focusing action of the movable block 12 When the objective lens driving device 8 is used in a state in which the focusing direction is not in the up and down direction, for example, the focus servo is applied to the movable block 12, for example, in the state in which the tilting operation of the objective lens driving device 8 is performed. Next, the position at which the drive current supplied to the focus coil 25 is 〇 can be set to the neutral position in the focus direction of the movable block 12. The drive current for focus adjustment or seek adjustment is supplied from the power supply circuit for power supply. The respective connecting portions 17b, 14b, ... of the substrate 17 are supplied to the support springs 2, 2, ..., etc. Each of the springs 20, 20, . . . functions as a member for supplying power to the Schau focus, the coil, and the seek coils 26, 26. The front side portion of the focus coil 25 and the seek coil 26, % before and after. On the side, magnets 13 and 13 (see FIG. 8) attached to the yoke portions 9b and 9b are respectively disposed. In this manner, the first magnetic circuit 27 can be configured by arranging the magnets 13, 13. The magnets 13, 13 and the outer and outer portions of the yoke portion, the focus coil 25 and the seek coils 26, 26 operate the movable block 12 in the focus direction or the tracking direction. On the rear portion of the coil holding portion 24 of the movable holder 21, The rear magnetic (four), μ, and the tilting magnets 29 and 29 are left and right and overlapped (see Figs. 2 and 3). The tilting magnets 29 and 29 are as shown in Fig. 2, with 1^2 291293 and 8 poles 2, 2 The two poles are magnetized in such a manner that they are disposed in the focus direction. 99535.doc 1300222 The tilting magnets 29, 29 are disposed opposite to the tilt coils 16, 16 respectively mounted on the front side of the fixed block (see Fig. 8). In this manner, The second magnetic circuit 3 can be formed by the tilting magnets 29 and 29 and the tilt coils 16 and 16 facing each other. 0, by tilting the magnets 29, 29, the back yokes 28, 28, the tilting coils 16, 16 and the tilting yokes 10b, 10b, the movable block 12 is moved in the oblique direction. If the driving current is from the power supply circuit When the power supply substrate 17, the relay substrate Μ, and the support magazines 20, 20, ... are supplied to the focus coil 25 or the seek coils %, 26, according to the direction of the drive currents and by the magnets 13, 13 and the magnetic The relationship of the direction of the magnetic flux generated by the yoke portions 9b, 9b causes the movable block 12 to move in the focus direction (the F direction shown in Fig. 3) or the seek direction (the direction shown in Fig. 3). Further, when the right drive current is supplied from the power supply circuit to the tilt coils 16 and 16 via the power supply substrate 丨7, the direction of the drive currents and the back yoke are used.
可動區塊12向聚焦方向、尋軌方向 時，支持彈簧20、20、…產生彈性變形 於可動支架21上所設置之物鏡。之下 31(參照圖9)。 28、28，傾斜磁鐵29、29及傾斜磁軛1〇b、1〇b所產生之磁 束方向的關係，使可動區塊i 2於傾斜方向（如圖3所示之r方 向）上移動。另外，若驅動電流供給至傾斜線圈ΐ6、Η時， 於可動區塊12上產生之推力於左側及右側產生於相反方向 (上下），可動區塊!2向傾斜方向動作，藉此進行傾斜調整。 或者傾斜方向動作 〇 方，配置有啟動鏡 著 於以上述方式而構成之光碟驅動裝置1中，若碟片括3隨 主軸馬達之旋轉而旋轉時，安裝於該碟片…上之碟片: 99535.doc -20- 1300222When the movable block 12 is in the focus direction and the tracking direction, the support springs 20, 20, ... are elastically deformed on the objective lens provided on the movable holder 21. Below 31 (refer to Figure 9). 28, 28, the relationship between the direction of the magnetic flux generated by the tilting magnets 29, 29 and the tilting yokes 1b, 1b, causes the movable block i2 to move in the oblique direction (r direction as shown in Fig. 3). Further, when the drive current is supplied to the tilt coils ΐ6 and Η, the thrust generated in the movable block 12 is generated in the opposite direction (up and down) on the left side and the right side, and the movable block !2 is moved in the tilt direction to perform the tilt adjustment. . Or, in the tilting direction, the driving mirror is disposed in the optical disc drive device 1 configured as described above, and when the disc 3 rotates with the rotation of the spindle motor, the disc attached to the disc is: 99535.doc -20- 1300222
記錄動作或再生動作。 與此同時，光讀取頭6向碟片狀記 動’進行該碟片狀記錄媒體100之 於此種記錄動作以及再生動作中，Record actions or regenerate actions. At the same time, the optical pickup 6 performs the recording operation and the reproducing operation of the disc-shaped recording medium 100 in the form of a disc-like recording.
，聚光於大致垂 直方向，以如此方式進行聚焦調整。 又，右驅動電流供給至尋執線圈26、26時，如上所述， 物鏡驅動裝置8之可動區塊12相對於固定區塊丨丨向圖3所示 之尋軌方向τ-τ動作，自光源出射且介以物鏡22照射之雷射 ，若驅動電流供給至聚 物鏡驅動裝置8之可動區塊12相對 之聚焦方向F-F動作，自設置於移 出射且介以物鏡22照射之雷射光 光光點，其聚光於碟片狀記錄媒體1〇〇之記錄軌道上，以如 此方式進行尋執調整。 又，若驅動電流供給至傾斜線圈16、16時，如上所述， _ 物鏡驅動裝置8之可動區塊12相對於固定區塊I〗向圖3所示 之傾斜方向R-R動作，自光源出射且介以物鏡22照射之雷射 光光點’其5^光於碟片狀s己錄媒體1 〇 〇之記錄軌道上，以如 此方式進行傾斜調整。 如上所述’於光項取頭6中’因設有傾斜磁鐵2 9、2 9且以 捲抽方向設為切線方向之方式配置有傾斜線圈16、16，故 而傾斜線圈16、16整體之約二分之一部分16&、16a、…可 作為使可動區塊12向傾斜方向產生推力之部分加以使用， 於傾斜調整時，可提高可動區塊12之靈敏度；上述傾斜磁 99535.doc 21 1300222 鐵29、29以N極29a、29a與S極29b、29b分開位於聚焦方向 之方式使兩極磁化。 又，由於可提高可動區塊12之靈敏度，故而不再需要使 用具有強磁力之磁鐵，並且無需向傾斜線圈16、16供給高 驅動電流，從而可降低物鏡驅動裝置8之製造成本且減少電 力消耗。 再者，因傾斜線圈16、16之捲軸方向未作為聚焦方向， 故而可減小切線方向上傾斜線圈16、16之配置空間，可減 小物鏡驅動裝置8於切線方向上之尺寸。 進而，於物鏡驅動裝置8中，由於物鏡22與傾斜調整用之 第2磁性電路30夾着聚焦調整用及尋軌調整用之第1磁性電 路2 7 ’且於切線方向上互相對向，因此啟動鏡3 1可配置於 與第1磁性電路27相同之高度位置，從而可實現物鏡驅動裝 置8之薄型化。此種薄型化對於攜帶型機器中所使用之光讀 取頭尤其有利。 又’物鏡驅動裝置8於可動區塊12上設有傾斜磁鐵29、 29，於固定區塊11上設有傾斜線圈16、16，因此無需設置 用以向傾斜線圈1 6、1 6供電之支持彈簧，從而減少零件數 量及簡化物鏡驅動裝置8之組裝性。 除此以外，於物鏡驅動裝置8中，由於將用以固定固定區 塊11之固定板1 0之一部分彎曲後設置傾斜磁轭丨〇b、丨〇b， 因此無需設置其他專用傾斜線圈，用以固定固定區塊i J之 部分’即板基座10a與傾斜磁軛10b、10b可共用，從而可減 少零件數量。 99535.doc -22- 1300222 於物鏡驅動裝置8中，於傾斜磁鐵29、29與傾斜線圈1 6、 1 6相對向面之反面側，配置有後磁輛28、28。 因此，於傾斜調整時可提高可動區塊12之靈敏度。 -另外，於未設有後磁軛28、28之情形下，如圖1〇所示， 例如’由於依據各部產生之磁力方向關係，傾斜磁鐵2 9之 上側部分被吸引至第1磁性電路27侧，傾斜磁鐵29之下側部 分與第1磁性電路27相斥，故而於傾斜磁鐵29中產生向下之 Φ 移動力P，可動區塊12向下方移動，可能對聚焦動作產生不 良影響。 此外，於物鏡驅動裝置8中，一對傾斜磁鐵29、29與傾斜 線圈16、16分別於尋執方向（如圖丨丨所示之τ方向）上分開設 置，於可動區塊12藉由尋軌動作向尋軌方向移動時，傾斜 磁鐵29、29與第1磁性電路27之位置關係產生變化，因此如 上所述，於傾斜磁鐵29、29受到第！磁性電路27之影響時， 傾斜磁鐵29、29中所產生之向下移動力左右不同，可動區 # 塊12向如圖11所示之R方向傾斜，介以物鏡22照射於碟片狀 5己錄媒體1 〇 〇上之雷射光光轴有可能傾斜。 進而，於物鏡驅動裝置8中，若由於製造上之誤差等使支 持彈簧20、20、…之彈力左右不同時，通常以聚焦動作時 可動區塊12向R方向傾斜之斜度達到最佳（零）之方式，進行 基座構件9於尋軌方向上的位置調整，但此情形時亦與上= 情形相同，由於傾斜磁鐵29、29與第丨磁性電路27之位置關 係產生變化，傾斜磁鐵29、29中產生之向下移動力左右不 同，從而可動區塊12可能向圖丨丨所示之尺方向傾斜。工 99535.doc -23- 1300222 然而，於物鏡驅動裝置8中，如上所述，於傾斜磁鐵2 9、 29與傾斜線圈16、16相對向面之反面側，配置有後磁軛28、 28，因此如圖I2所示，來自傾斜磁鐵29、29之洩漏磁束減 少，第2磁性電路30難以受到第1磁性電路27之影響，從而 可防止如上所述之可動區塊12向R方向傾斜。 另外，物鏡驅動裝置8亦可不設置後磁軛28、28，此情形 時如上所述，利用傾斜磁鐵29、29中產生之朝向基座構件9Focusing in a substantially vertical direction, focusing adjustment is performed in this manner. Further, when the right drive current is supplied to the seek coils 26, 26, as described above, the movable block 12 of the objective lens driving device 8 is moved relative to the fixed block toward the tracking direction τ-τ shown in FIG. When the light source is emitted and the laser is irradiated by the objective lens 22, if the driving current is supplied to the movable block 12 of the polymer mirror driving device 8 to move in the focusing direction FF, the laser beam is irradiated and emitted by the objective lens 22. At the point, it is condensed on the recording track of the disc-shaped recording medium 1 to perform the seek adjustment in this manner. Further, when the drive current is supplied to the tilt coils 16, 16, as described above, the movable block 12 of the objective lens driving device 8 operates in the tilt direction RR shown in FIG. 3 with respect to the fixed block I, and is emitted from the light source. The laser light spot irradiated by the objective lens 22 is placed on the recording track of the disc-shaped recording medium 1 ,, and the tilt adjustment is performed in this manner. As described above, the 'in the light-receiving head 6' is provided with the tilting magnets 2 9 and 29 and the tilting coils 16 and 16 are arranged such that the winding direction is the tangential direction. Therefore, the tilt coils 16 and 16 as a whole are approximately The one-half portion 16&, 16a, ... can be used as a portion for causing the movable block 12 to generate thrust in the oblique direction, and the sensitivity of the movable block 12 can be improved when the tilt is adjusted; the above-mentioned tilting magnetic 95535.doc 21 1300222 The irons 29 and 29 magnetize the two poles such that the N poles 29a and 29a are separated from the S poles 29b and 29b in the focusing direction. Moreover, since the sensitivity of the movable block 12 can be improved, it is no longer necessary to use a magnet having a strong magnetic force, and it is not necessary to supply a high drive current to the tilt coils 16, 16, thereby reducing the manufacturing cost of the objective lens driving device 8 and reducing power consumption. . Further, since the reel direction of the tilt coils 16 and 16 is not the focus direction, the arrangement space of the tilt coils 16 and 16 in the tangential direction can be reduced, and the size of the objective lens driving device 8 in the tangential direction can be reduced. Further, in the objective lens driving device 8, since the objective lens 22 and the second magnetic circuit 30 for tilt adjustment are opposed to each other in the tangential direction by the first magnetic circuit 27' for focus adjustment and tracking adjustment, The start mirror 31 can be disposed at the same height position as the first magnetic circuit 27, so that the objective lens driving device 8 can be made thinner. Such thinning is particularly advantageous for optical reading heads used in portable machines. Further, the objective lens driving device 8 is provided with tilting magnets 29 and 29 on the movable block 12, and the tilting coils 16 and 16 are provided on the fixed block 11, so that it is not necessary to provide support for supplying power to the tilting coils 16 and 16. The springs reduce the number of parts and simplify the assembly of the objective lens driving device 8. In addition, in the objective lens driving device 8, since one of the fixing plates 10 for fixing the fixed block 11 is bent and the tilt yokes 丨〇b and 丨〇b are provided, it is not necessary to provide other dedicated tilting coils. The portion of the fixed fixed block i J 'that is, the plate base 10a and the inclined yokes 10b, 10b can be shared, so that the number of parts can be reduced. 99535.doc -22- 1300222 In the objective lens driving device 8, the rear magnetic vehicles 28 and 28 are disposed on the opposite sides of the opposing faces of the inclined magnets 29 and 29 and the tilt coils 16 and 16. Therefore, the sensitivity of the movable block 12 can be improved at the time of tilt adjustment. Further, in the case where the back yokes 28 and 28 are not provided, as shown in FIG. 1A, for example, the upper side portion of the tilt magnet 29 is attracted to the first magnetic circuit 27 due to the magnetic direction relationship generated in accordance with each portion. On the side, the lower side portion of the tilt magnet 29 repels the first magnetic circuit 27, so that the downward Φ moving force P is generated in the tilt magnet 29, and the movable block 12 moves downward, which may adversely affect the focusing operation. Further, in the objective lens driving device 8, the pair of tilting magnets 29, 29 and the tilting coils 16, 16 are respectively disposed apart in the seek direction (the τ direction shown in FIG. )), and the movable block 12 is searched by the movable block 12. When the rail operation moves in the tracking direction, the positional relationship between the tilt magnets 29 and 29 and the first magnetic circuit 27 changes. Therefore, as described above, the tilt magnets 29 and 29 are subjected to the first! When the magnetic circuit 27 is affected, the downward moving force generated in the inclined magnets 29, 29 is different from left to right, and the movable block # block 12 is inclined in the R direction as shown in Fig. 11, and the objective lens 22 is irradiated onto the disk shape. The laser light axis on the recording media 1 may be tilted. Further, in the objective lens driving device 8, when the elastic forces of the support springs 20, 20, ... are different depending on manufacturing errors or the like, the inclination of the movable block 12 in the R direction is generally optimal during the focusing operation ( In the manner of zero), the position adjustment of the base member 9 in the tracking direction is performed, but in this case as well as in the case of the upper =, the positional relationship between the inclined magnets 29, 29 and the second magnetic circuit 27 is changed, and the tilting magnet is changed. The downward moving force generated in 29, 29 is different from left to right, so that the movable block 12 may be inclined toward the ruler direction shown in FIG. However, in the objective lens driving device 8, as described above, the back yokes 28 and 28 are disposed on the opposite sides of the opposing faces of the tilting magnets 29 and 29 and the tilting coils 16 and 16. Therefore, as shown in Fig. 12, the leakage magnetic fluxes from the inclined magnets 29 and 29 are reduced, and the second magnetic circuit 30 is hardly affected by the first magnetic circuit 27, so that the movable block 12 as described above can be prevented from inclining in the R direction. Further, the objective lens driving device 8 may not be provided with the rear yokes 28, 28, in which case the base member 9 generated by the inclined magnets 29, 29 is used as described above.
側（下方側）之移動力，於未供給驅動電流至聚焦線圈25之非 使用狀態下，不論可動區塊丨2之使用姿勢如何，均可保持 物鏡22接離於碟片狀記錄媒體1〇〇，且可防止碟片狀記錄媒 體100與物鏡22相接觸。 如上所述，以將聚焦方向設為上下方向且尋執方向役為 左右方向之方式加以說明，,b等方向係為便於說 者，但並未限定於此等方向。 中所示之各部分的具體 以具體化之一例，不可 於上述用以實施發明之最佳形態 形狀及構造均僅為實施本發明時加 因此而限定性解釋本發明之技術範 【圖式簡單說明】 usg Ji 取佳形態 者，本圖係光碟驅動裝置之概略立體圖。 圖2係分解表示物鏡驅動裝置之一部分 圖3係物鏡驅動裝置之放大立體圖。、放大立體圖。 圖4係取下供電用基板後表示物鏡驅動 圖。 ^ 之放大立體 99535.doc -24- 1300222 ® 5係表示自與圖3不同方向觀察物鏡 敌大立體圖。 圖6係表示固定區塊之放大分解立體圖。 圖7係表示省略物鏡驅動裝置之一部分且自與圖3、圖5 不同方向觀察之狀態的放大立體圖。 圖8係表示約磁性電路與第2磁性電路之放大立體圖。The moving force of the side (lower side) can keep the objective lens 22 disconnected from the disc-shaped recording medium 1 regardless of the use posture of the movable block 丨2 in the non-use state in which the drive current is not supplied to the focus coil 25. That is, the disc-shaped recording medium 100 can be prevented from coming into contact with the objective lens 22. As described above, the focus direction is set to the up-and-down direction and the seek direction is the left-right direction. The direction of b is convenient for the speaker, but the direction is not limited thereto. The specific embodiments of the various embodiments shown in the above description are not to be construed as limiting the scope of the invention. Description] usg Ji Take the best form, this picture is a schematic perspective view of the CD drive. Fig. 2 is an exploded perspective view showing one portion of the objective lens driving device. Fig. 3 is an enlarged perspective view showing the objective lens driving device. , enlarge the perspective picture. Fig. 4 is a view showing an objective lens driving diagram after the power supply substrate is removed. ^ Magnified three-dimensional 99535.doc -24- 1300222 ® 5 series means that the objective lens is observed from a different direction from Figure 3. Fig. 6 is an enlarged exploded perspective view showing a fixed block. Fig. 7 is an enlarged perspective view showing a state in which one portion of the objective lens driving device is omitted and viewed from a direction different from that of Figs. 3 and 5; Fig. 8 is an enlarged perspective view showing the magnetic circuit and the second magnetic circuit.
圖9係表示物鏡驅動裝置之概略放大側視圖。 圖係表示未設有後磁軛之情形 ^ n . 月小時磁力方向的概念圖。 固11係用以說明於未設有後磁幸尼之 作的概念圖。 月y夺可能產生之動 圖12係表示設有後磁軛之情形時磁 【主要元件符號說明】 方向的概念圖。 100 碟片狀記錄媒體 1 光碟驅動裝置 3 碟片招 6 光讀取頭 7 移動基座 8 物鏡驅動裝置 1〇 固定板 l〇b 傾斜磁軛 11 固定區塊 12 可動區塊 16 傾斜線圈 2〇 支持彈簧 99535.doc -25- 1300222 22 27 28 29 29a 29b 30 物鏡 第1磁性電路 後磁軛 傾斜磁鐵 N極 S極 第2磁性電路Fig. 9 is a schematic enlarged side view showing the objective lens driving device. The figure shows the case where the back yoke is not provided. ^ n . Conceptual diagram of the magnetic direction of the month. The solid 11 series is used to illustrate the conceptual diagram of the work without the magnetism. Fig. 12 is a conceptual diagram showing the direction of the magnetic [main component symbol description] when the back yoke is provided. 100 disc-shaped recording medium 1 Optical disc drive unit 3 Disc guide 6 Optical pickup head 7 Moving base 8 Objective lens driving device 1〇 Fixed plate l〇b Tilting yoke 11 Fixed block 12 Movable block 16 Tilt coil 2〇 Support spring 99535.doc -25- 1300222 22 27 28 29 29a 29b 30 Objective lens 1st magnetic circuit back yoke tilt magnet N pole S pole 2nd magnetic circuit
99535.doc -2699535.doc -26