1294619 九、發明說明： 【發明所屬之技術領域】 本發明有關一種光碟機，尤其是關於光碟機讀取頭之 傳動機構中，引導讀取頭滑動的導桿之固定裝置。 【先前技術】 為了增加記憶容量，光碟片的資料密度不僅越來越 高，甚至製成雙層或三層記憶面的光碟片。相對的，光碟 機必須具有精密的結構，才能精確對準光碟片上細密的資 料記號，以正確讀出或寫入資料。 如圖1所示，一習知光碟機的機芯10，其上設有一轉 動光碟片的主轴馬達11，沿著主軸馬達11的徑向，平行 設置兩根導桿，一為主導桿12，另一為副導桿13，使一讀 取頭14 一端套入主導桿12，另一端則架在副導桿13上， 由一傳動機構15帶動，在兩導桿沿著主軸馬達11的徑向 來回滑動，使物鏡16對準光碟片上的資料記號。 然而，如圖2所示，由習知光碟機機芯10的背面分 解圖，可見主導桿12與副導桿13的兩端，係分別由固定 座17固定在機芯10上。反觀，主軸馬達11則固設在一馬 達底板18上，然後再將馬達底板18裝設在機芯10。顯然， 主軸馬達11與主導桿12並非以同一基準作為定位面。在 製造上，主軸馬達11必需經過主軸馬達11對馬達底板18, 馬達底板18對機芯10的兩段累積製造公差，才能固定在 機芯10。同樣讀取頭14也必需經過讀取頭14對主導桿 12，主導桿12對固定座17及固定座17對機芯10的三段 累積製造公差，才能固定在機芯10，再加上彼此在機芯10 相對公差，共需經累積六段製造公差，因此，機芯10的C 尺寸變異很大，必需嚴格的控制前述六段累積製造公差的 精度，才能確保讀取頭14對準光碟片上的資料記號。無形 5BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk drive, and more particularly to a fixing device for guiding a sliding guide of a reading head in a transmission mechanism of a disk drive reading head. [Prior Art] In order to increase the memory capacity, the data density of the optical disc is not only higher and higher, and even a disc having a double or triple memory surface is formed. In contrast, the optical drive must have a sophisticated structure to precisely align the fine-grained material marks on the disc to properly read or write data. As shown in FIG. 1, a movement 10 of a conventional optical disc drive is provided with a spindle motor 11 for rotating an optical disc. Two guide rods are arranged in parallel along the radial direction of the spindle motor 11, and a guide rod 12 is arranged. The other is a sub-guide 13 such that one end of a read head 14 is nested into the main rod 12, and the other end is mounted on the sub-guide 13 and driven by a transmission mechanism 15 along the diameter of the main motor 11 of the two guide rods. Slide back and forth to align the objective lens 16 with the data mark on the disc. However, as shown in Fig. 2, from the rear side view of the conventional optical disk drive 10, it can be seen that both ends of the main guide 12 and the sub guide 13 are fixed to the movement 10 by the fixed base 17, respectively. In contrast, the spindle motor 11 is fixed to a motorized base plate 18, and then the motor base plate 18 is attached to the movement 10. Obviously, the spindle motor 11 and the main rod 12 do not have the same reference as the positioning surface. In terms of manufacturing, the spindle motor 11 must be assembled to the movement 10 by the spindle motor 11 to the motor base plate 18, and the two stages of the motor base plate 18 to the movement 10 are cumulatively manufactured. Similarly, the read head 14 must also pass through the read head 14 to the main rod 12, the main shaft 12 to the fixed seat 17 and the fixed seat 17 to the three-stage cumulative manufacturing tolerance of the movement 10, in order to be fixed to the movement 10, plus each other In the relative tolerance of the movement 10, a total of six manufacturing tolerances are required to be accumulated. Therefore, the C dimension of the movement 10 varies greatly, and the precision of the above-mentioned six-stage cumulative manufacturing tolerance must be strictly controlled to ensure that the reading head 14 is aligned with the optical disc. The data mark on the film. Invisible 5
1294619 中使％製造過程中，機芯1〇 光碟機的生產成太，^ ^不良率居鬲不下，不僅增加 現有光碟機機ίί構^ 機讀取的精雜。因此， 飛“、、、σ構上，仍有問題需待解決。 【發明内容】 本發明之目的在提供一種光碟 # 將固定座固^在光碟機馬達底板由直接 對主轴馬達的累積公差。· u降低組裝後讀取頭 本發明另一目的在提供一種光碟機 :定=接成形，碟機馬達底板上機=與= 板一體成形，以間化零件、結構及組裝製造。 為了達到前述發明的目的，本發明之光碟機固定裝置 設於一光碟機的機芯上，包含馬達底板固定一主軸馬達， 一固定座設在馬達底板在靠近主軸馬達的端緣，固定座在 端緣側邊上設一凹槽，並與主軸馬達的中心保持一預定距 離。機芯沿主轴馬達控向兩側設置相互平行的導桿，一傳 動機構由一端帶動讀取頭在兩導桿滑動，靠近傳動機構的 主導桿一端凸出一支軸，固定於固定座的凹槽，使主導桿 與主軸馬達的中心維持預定距離，以減少累積製造公差。 【實施方式】 有關本發明為達成上述目的，所採用之技術手段及其 功效，茲舉較佳實施例，並配合圖式加以說明如下。 請參考圖3，為本發明第一實施例的固定裝置2〇設於 一光碟機的機芯30上，該固定裝置20主要包括馬達底板 21、主軸馬達22與固定座23。其中馬達底板21具有一通 孔24用以固定主轴馬達22，使主軸馬達22可自由轉動， 馬達底板21並在通孔24周圍開設數個固定孔26，並具有 相對的螺絲27。另外，馬達底板21在靠近通孔24的端緣 6In the manufacturing process of 1294619, the production of the movement 1 〇 CD player was too good, and the defect rate was not enough, which not only increased the complexity of the existing CD player. Therefore, there is still a problem to be solved in the fly ",, σ structure." SUMMARY OF THE INVENTION The object of the present invention is to provide an optical disk # 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定u Reduce the post-assembly read head Another object of the present invention is to provide an optical disc drive: fixed = joint forming, the disc motor bottom plate = integral with the = plate, to intervene parts, structure and assembly manufacturing. The object of the invention is that the CD player fixing device of the present invention is arranged on the movement of a CD player, and comprises a motor base plate for fixing a spindle motor, a fixing seat is arranged on the bottom edge of the motor bottom plate near the spindle motor, and the fixing seat is on the end edge side. A groove is arranged on the side and is kept at a predetermined distance from the center of the spindle motor. The movement is arranged parallel to each other along the control side of the spindle motor, and a transmission mechanism is driven by one end to slide the reading head on the two guide rods, close to One end of the main rod of the transmission mechanism protrudes from a shaft fixed to the groove of the fixing seat to maintain the predetermined distance between the main rod and the center of the main shaft motor to reduce accumulated manufacturing tolerances. MODES FOR CARRYING OUT THE INVENTION The present invention has been described in detail with reference to FIG. 3, which is a first embodiment of the present invention. The fixing device 20 is mainly provided with a motor base plate 21, a spindle motor 22 and a fixing base 23. The motor base plate 21 has a through hole 24 for fixing the spindle motor 22, so that the spindle motor 22 can be Freely rotating, the motor base plate 21 has a plurality of fixing holes 26 around the through hole 24 and has opposite screws 27. In addition, the motor base plate 21 is near the end edge of the through hole 24 6
1294619 設置一固定座23，固定座23端緣側邊上挖設〆凹槽25 9 該凹槽25與主軸馬達22的中心保持一預定的距離。 機芯30上挖設一圓形孔31及一直形槽32，直形槽32 沿著圓形孔31的徑向設置，並與圓形孔31相貫通’在圓 形孔31及一直形槽32兩側上，各設相互平行的導桿，一 為主導桿33，另一為副導桿34，副導桿34的兩端分別由 定位座35a、35b固定在機芯30上，主導桿33 —端由一定 =座35c固定在機芯3〇上，另一端則凸出一支轴36。一 讀取頭37 —端跨接於副導桿34上，另一端則套入主導桿 =^ 一傳動機構38則連接於讀取頭37套入主導桿33的 —端，帶動讀取頭37在兩平行的導桿33、34上滑動。此 外’機怒30在相對固定孔26的位置凸設數根固定柱。 士請配合芩考圖4，本發明的固定裝置2〇組裝在機芯3〇 時，係先將主軸馬達22固定於馬達底板21的通孔24上， ，主軸馬達22在通孔24中，不受影響自由轉動，再將固 又座23裝6又於主軸馬達22旁，使其凹槽25的中心與主轴 達22的中心保持一預定的c尺寸距離，讓主導桿33 — 端凸出的支軸36，嵌入固定座23端緣側邊上的凹槽25， 使主導桿33與主軸馬達22的中心達到保持c尺寸距離， 再將主軸馬達22對準圓形孔31並置入其中，然後以螺絲 27分別穿過固定孔26，使固定裝置2〇鎖固於機芯3〇丄。' ，傳動機構38帶動讀取頭37，在平行的主導桿33與副導 =34上/骨動，並使碩取頭37沿著直形槽32，在主轴馬達 的徑向來回移動，以讀寫資料。 ^由於本發明將主軸馬達22及固定座23同時定位在固 疋襄置20上，使主軸馬達22及固定座23均以固定裝置 2〇,定位基準，直接由主轴馬達22及@定座㈡在固定裝 置0的輯定出C尺寸，可減少_公差，確保主導桿 、、隹持C尺寸的距離，則丨導讀取頭36精確對準碟片上 71294619 A fixing seat 23 is provided, and a groove 25 is formed on the side edge of the end of the fixing seat 23. The groove 25 is kept at a predetermined distance from the center of the spindle motor 22. A circular hole 31 and a straight groove 32 are formed in the movement 30. The straight groove 32 is disposed along the radial direction of the circular hole 31 and penetrates with the circular hole 31. The circular hole 31 and the straight groove are formed. On both sides of the 32, there are mutually parallel guide rods, one is a main rod 33, and the other is a sub-guide rod 34. The two ends of the sub-guide rod 34 are respectively fixed on the movement 30 by the positioning seats 35a, 35b, the main rod 33 - The end is fixed to the movement 3 由 by a certain = seat 35c, and the other end protrudes a shaft 36. A read head 37 is connected across the sub-guide 34 at the other end, and the other end is inserted into the main rod. The transmission mechanism 38 is connected to the end of the read head 37 and inserted into the main shaft 33 to drive the read head 37. Slide on the two parallel guides 33, 34. Further, the anger 30 is provided with a plurality of fixing posts at positions opposite to the fixing holes 26. Referring to FIG. 4, when the fixing device 2 of the present invention is assembled in the movement 3〇, the spindle motor 22 is first fixed to the through hole 24 of the motor base plate 21, and the spindle motor 22 is in the through hole 24, Without being affected by free rotation, the fixed seat 23 is mounted next to the spindle motor 22 such that the center of the groove 25 maintains a predetermined c-size distance from the center of the main shaft 22, so that the end of the main rod 33 protrudes. The fulcrum 36 is embedded in the groove 25 on the side edge of the end of the fixing seat 23 so that the center of the spindle rod 22 and the spindle motor 22 are kept at a c-size distance, and the spindle motor 22 is aligned with the circular hole 31 and placed therein. Then, the fixing device 2 is locked to the movement 3〇丄 by the screws 27 passing through the fixing holes 26, respectively. ', the transmission mechanism 38 drives the reading head 37, on the parallel main rod 33 and the sub-guide = 34 / bone movement, and the so-called head 37 along the straight groove 32, in the radial direction of the spindle motor to move back and forth Read and write data. Since the spindle motor 22 and the fixing base 23 are simultaneously positioned on the fixing device 20, the spindle motor 22 and the fixing base 23 are both fixed by the fixing device 2, and the positioning reference is directly provided by the spindle motor 22 and the @ seat (2). In the fixed device 0, the C size can be reduced, the tolerance can be reduced, and the distance between the main rod and the C size can be ensured. Then, the read head 36 is precisely aligned with the disc.
1294619 的記號，尤其是更精密的雙層光碟片。因此機芯的c尺寸 變異性可減少，讓機芯30在製造組裝上降低不良率的產 生，以節省製造成本。 如圖5所示，為本發明第二實施例的光碟機固定裝置 40，基本的結構與第一實施例大致相同，為簡化說明與第 一實施例相同的機芯構件，以相同的件號表示。本實施例 的光碟機固定裝置40主要仍包含馬達底板41、主轴馬達 42與固定座43。主軸馬達42固定在馬達底板41上。不同 處在於固定座43 —體成形設置在靠近主軸馬達42的馬達 底板41上，與主轴馬達42的中心保持一預定C尺寸的距 離。讓機芯30之主導桿33嵌入固定座43，使主導桿33 與主軸馬達42的中心達到保持C尺寸距離，以便傳動機構 38帶動讀取頭37，在平行的主導桿33與副導桿34上滑 動，以讀寫資料。 本實施例在製造上，將固定座43 —體成形在馬達底板 41上，主軸馬達42僅需經過對固定裝置40的製造公差， 同樣讀取頭36也僅需經過對主導桿33，主導桿33對固定 座43，二段累積製造公差，再加上彼此在固定裝置40相 對公差，僅需累積4段製造公差，而可降低組裝後讀取頭 對主軸馬達的累積公差，此外，減少分離式固定座23的設 置，亦可簡化機芯的結構及降低固定座零件的成本。 以上所述者，僅為用以方便說明本發明之較佳實施 例，本發明之範圍不限於該等較佳實施例，凡依本發明所 做的任何變更，於不脫離本發明之精神下，皆屬本發明申 請專利之範圍。 8 1294619 【圖式簡單說明】 圖1為習知光碟機機芯之上視圖。 圖2為習知光碟機機芯之背面分解立體圖。 圖3為本發明第一實施例光碟機機芯之背面分解立體圖。 圖4為本發明第一實施例光碟機機芯之背面組合立體圖。 圖5為本發明第二實施例光碟機機芯之背面組合立體圖。The mark of 1294619, especially the more precise double-layer disc. Therefore, the c-size variability of the movement can be reduced, and the movement 30 can be reduced in manufacturing assembly to reduce the manufacturing cost. As shown in FIG. 5, the optical disc drive fixing device 40 according to the second embodiment of the present invention has substantially the same basic structure as that of the first embodiment. To simplify the description of the same movement member as the first embodiment, the same part number is used. Said. The optical disk drive fixing device 40 of this embodiment mainly mainly includes a motor base plate 41, a spindle motor 42 and a fixing base 43. The spindle motor 42 is fixed to the motor base plate 41. The difference is that the fixing base 43 is integrally formed on the motor base 41 close to the spindle motor 42 to maintain a predetermined C size distance from the center of the spindle motor 42. The main rod 33 of the movement 30 is inserted into the fixing seat 43 so that the center of the main shaft 33 and the main shaft motor 42 are kept at a C-size distance, so that the transmission mechanism 38 drives the reading head 37, and the parallel main rod 33 and the sub-guide rod 34 are provided. Swipe up to read and write data. In this embodiment, the fixing base 43 is integrally formed on the motor base plate 41. The spindle motor 42 only needs to pass the manufacturing tolerance of the fixing device 40, and the reading head 36 only needs to pass through the pair of rods 33 and the rod. 33 pairs of fixing seats 43, two sections of cumulative manufacturing tolerances, plus the relative tolerance of each other in the fixture 40, only need to accumulate 4 sections of manufacturing tolerances, but can reduce the cumulative tolerance of the head after assembly of the spindle motor, in addition, reduce separation The arrangement of the fixing seat 23 can also simplify the structure of the movement and reduce the cost of the fixing part. The above is only a preferred embodiment for facilitating the description of the present invention, and the scope of the present invention is not limited to the preferred embodiments, and any changes made in accordance with the present invention may be made without departing from the spirit of the present invention. All of them are within the scope of the patent application of the present invention. 8 1294619 [Simple description of the drawings] Fig. 1 is a top view of a conventional optical disc drive. 2 is an exploded perspective view of the back of a conventional optical disk drive. Fig. 3 is an exploded perspective view showing the back of the optical disc drive of the first embodiment of the present invention. Figure 4 is a perspective view showing the back side of the optical disc drive movement of the first embodiment of the present invention. Figure 5 is a perspective view showing the back side of the optical disc drive of the second embodiment of the present invention.
【主要元件符號說明】 20 第一實施例固定裝置 21 馬達底板 22 主轴馬達 23 固定座 24 通孔 25 凹槽 26 固定孔 27 螺絲 30 機芯 31 圓形孔 32 直形槽 33 主導桿 34 副導桿 35a 、35b、35c定位座 36 支轴 37 讀取頭 38 傳動機構 39 固定柱 40 第二實施例固定裝置 41 馬達底板 42 主軸馬達 43 固定座[Main component symbol description] 20 First embodiment Fixing device 21 Motor base plate 22 Spindle motor 23 Fixing seat 24 Through hole 25 Groove 26 Fixing hole 27 Screw 30 Movement 31 Circular hole 32 Straight groove 33 Dominant rod 34 Secondary guide Rods 35a, 35b, 35c Positioning seat 36 Support shaft 37 Reading head 38 Transmission mechanism 39 Fixing post 40 Second embodiment Fixing device 41 Motor base plate 42 Spindle motor 43 Mounting seat