200905669 九、發明說明： 【發明所屬之技術領域】 本發明有關-種光碟機，尤其關於薄型光碟機中，用 以防止連接托盤及主機板作$電性連接及資訊傳輸的排 線，受到磨損之排線防磨袭置。 【先前技術】 身又4型光碟機利用軟性排線電性連接活動的托盤及 固定的主機板’提供托盤上電子組件的電源及讀寫資訊的 傳輸控制。由於薄型光碟機厚度較薄，構件間距彳艮小，托 盤來回移進或移出光碟機，容易壓擠磨擦排線，—旦排線 表皮破損，就會直接影響訊號傳輸，而降低光碟機運作的 可靠性。 如圖1所示，為先前技術之薄形光碟機1，由一中空 的機设2容納主機板3及托盤4，主機板與托盤4間以一 排線5連接，作為連接的排線5通常有兩種，一為fpc排 線（即印刷電路板排線，Flexible Printed Circuit)，另 一種為FFC排線（即軟性排線， Flexible Flat Circuit)。FPC排線厚度較薄但較貴，以非重疊方式設置， 而FFC排線雖厚度較厚，以重疊方式設置，但較便宜且容 易製造’有逐漸取代FPC排線的趨勢。以軟性排線為例， 一般排線5對折疊置，分為固定部6與活動部7，固定部6 位於下面且黏固在托盤4内側底面上，一端連接於主機板 3，另一端連接於活動部7，活動部7位於上面，其另一端 則連接至托盤4下方的電路板8 ’提供托盤4上的主軸馬 200905669 達9及讀取頭10的電源及訊號傳輸控制，另在托盤4的下 方覆蓋一金屬的保護底板u，隨托盤4移動，以防止電路 板8電磁干擾。托盤4可自由滑進滑出機殼2以播放或更 換光1片12，利用主軸馬達9轉動光碟片12,控制讀取頭 10沿著光碟片12的徑向來回移動，讀寫光碟片12上的資 料記號，再經由電路板8藉排線5的連接，將讀取頭1〇讀 取的資料傳輸至主機板3進行訊號處理。 為了攜帶方便，使用於筆記型電腦的薄型光碟機卜 有-定的厚度限制，托盤4τ的保護底板—般緊貼著 排線5活動部7的上方滑動，兩者的間隔距離很小，再加 上支撐托盤4滑動的導執，為了讓托盤4能順利滑動，導 軌係採較寬鬆的滑動配合設計。因此，當托盤4推送入薄 型光碟機1受到推壓或振動時，常導致保護底板11的後 ，，觸及並刮傷排線5活動部7的表面，《而久之傷及排 ^ 5内的‘線’影響光碟機訊號傳輸。為了防止保護底板 的，端，觸及軟性排線5活動部7的表面，絲技術另 在固定排線5固定部6前端的機殼2上，設一凹槽13，將 =5的折疊端固定在凹槽13内，以增加排線5與保護底 板11的間格距離。 然而’先則技術在機殼向下衝壓凹槽，不僅增加製造 2二無审形中已增加薄型光碟機的厚度，並不合薄型光 辑Μ更小厚度的需求。同時先前技術向下凸出的凹 影響光碟機機殼表面平整度，更增添處理平整度 、 #者’雖然凹槽使排線折疊端與保護底板的間 200905669 隔距離加大’但凹槽為不影響機殼太大 有限範圍，讓未設^槽㈣排線（如 ’僅 被保護底板刮到，並無法完全防止排線芯：二= 【發明内容】 衣置仍有問赫在，有待決解決。 在仵供—種光碟機排線防磨裝置，藉由 轉麟_，以㈣制 m㈣㈣刮傷，並避免 衫響到機⑨’㈣低K造的_度及成本。 本發明另-目的在提供一種光碟機排線防磨裂置，利200905669 IX. Description of the Invention: [Technical Field] The present invention relates to an optical disc drive, and more particularly to a thin optical disc drive, which is used to prevent the connection tray and the main board from being electrically connected and information transmission. The cable is protected against abrasion. [Prior Art] The body type 4 CD player uses a flexible cable to electrically connect the active tray and the fixed motherboard to provide power control and transmission control of the electronic components on the tray. Since the thickness of the thin optical disc drive is thin, the spacing of the components is small, the tray moves back and forth into or out of the optical disc drive, and it is easy to squeeze the friction cable. If the cable skin is damaged, it will directly affect the signal transmission and reduce the operation of the optical disc drive. reliability. As shown in FIG. 1 , the thin optical disc drive 1 of the prior art is provided with a hollow machine 2 for accommodating the main board 3 and the tray 4, and the main board and the tray 4 are connected by a row of wires 5 as a connecting cable 5 . There are usually two types, one is the fpc cable (ie, the printed circuit board cable, Flexible Printed Circuit), and the other is the FFC cable (the flexible flat circuit). FPC cables are thinner but more expensive, and are arranged in a non-overlapping manner. While the FFC cables are thicker and arranged in an overlapping manner, they are cheaper and easier to manufacture. There is a tendency to gradually replace FPC cables. Taking the flexible cable as an example, the common cable 5 is folded and divided into a fixed portion 6 and a movable portion 7. The fixing portion 6 is located below and adhered to the inner bottom surface of the tray 4, one end is connected to the motherboard 3, and the other end is connected. In the movable part 7, the movable part 7 is located on the upper side, and the other end is connected to the circuit board 8' under the tray 4 to provide the spindle horse 200905669 on the tray 4 up to 9 and the power supply and signal transmission control of the read head 10, and in the tray The lower part of 4 is covered with a metal protective bottom plate u, which moves with the tray 4 to prevent electromagnetic interference of the circuit board 8. The tray 4 can be slid into and out of the casing 2 to play or replace the light sheet 12, and the optical disk 12 is rotated by the spindle motor 9, and the reading head 10 is controlled to move back and forth along the radial direction of the optical disk 12, and the optical disk 12 is read and written. The data symbol on the board is transferred to the motherboard 3 for signal processing via the connection of the circuit board 8 via the cable 5. For the convenience of carrying, the thin optical disc machine used in the notebook computer has a certain thickness limit, and the protective bottom plate of the tray 4τ is generally slid against the upper portion of the movable portion 7 of the cable 5, and the distance between the two is small, and then In addition to the guide for sliding the support tray 4, in order to allow the tray 4 to slide smoothly, the guide rail adopts a looser sliding fit design. Therefore, when the tray 4 is pushed into the thin disc player 1 to be pressed or vibrated, it often causes the surface of the movable portion 7 to be touched and scratched after the bottom plate 11 is protected, and the inside of the row 5 is damaged. 'Line' affects the signal transmission of the disc player. In order to prevent the surface of the protective bottom plate from contacting the surface of the movable portion 7 of the flexible cable 5, the wire technology is further provided on the casing 2 at the front end of the fixing portion 6 of the fixed cable 5, and a recess 13 is provided to fix the folded end of =5. In the groove 13, the distance between the wire 5 and the protective substrate 11 is increased. However, the technique of punching the groove down in the casing not only increases the thickness of the thin optical disk drive in the manufacturing process, but also does not meet the demand for thinner light. At the same time, the recessed protrusion of the prior art affects the flatness of the surface of the optical disc drive case, and the processing flatness is further increased, although the groove increases the distance between the folded end of the cable and the protective bottom plate by 200905669, but the groove is Does not affect the casing is too large a limited range, so that there is no slot (four) cable (such as 'only scratched by the protective floor, and can not completely prevent the core: two = [invention content] clothing is still in question, waiting The solution is to solve the problem. In the 仵 — 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种 种- The purpose is to provide a disc drive line anti-wear and crack,
用保護底板上内凹〜條抽 ,^Λ , JO r^- LUse the concave plate on the protective bottom plate to draw, ^Λ, JO r^- L
，、钇，相加保濩底板與排線整體間 距，以防止排線遭到到傷。 H 本發明再-目的在提供一種光碟機排線防磨農置，利, , 钇, add the overall distance between the bottom plate and the cable to prevent the cable from being injured. H. The present invention further aims to provide an optical disc drive line for anti-wearing,
用保護底板尾端設一防麻S 私一，吐—I 々磨層，墊南保護底板與排線整體間 距，以防止排線遭到到傷。 為了達到前述發明& , . α , ^ d的目的’本發明之光碟機排線防磨 裝置’設於一光碟機之擔紅土 ^機设中’機殼具有一出口，供一托Use the end of the protective bottom plate to set a protective anti-small S private, spit-I honing layer, pad south to protect the bottom plate and the entire line spacing to prevent the cable from being injured. In order to achieve the foregoing invention & , . . . , d d, the optical disc drive wire anti-wear device of the present invention is disposed in a red clay machine of an optical disk drive. The casing has an outlet for one support.
盤進出，托盤前端連拉—工A ^ 面板，一排線具有固定部與活動 部，固定部固設於機殼，工士 * ^ ，活動部由固定部的一端反向延伸 形成折疊端，折疊端固执 土 U s又於罪近機殼出口，活動部一端連 接於托盤，一保護底叔港 A y L 取復盍於托盤下方，保護底板尾端翹 起形成一圓弧狀端邊的 β狐形尾，一條槽凹設於保護底板底 面，且：於排線相對移動路徑的上方，條槽的寬度略大於 排線的覓度，由保護底板弧形尾的後端，成形至靠面板的 前端。 7 200905669 另一實施例之光碟機排線防磨裝置，設於一光碟機之 機殼中，機殼具有一出口，供一托盤進出，一排線具有固 定部與活動部，固定部固設於機殼，活動部由固定部的一 端反向延伸形成折疊端，折疊端固設於靠近機殼出口，活 動部一端連接於托盤，一保護底板覆蓋於托盤下方，保護 底板尾端翹起，形成一圓弧狀端邊的弧形尾，一防磨層設 於保護底板弧形尾附近底面，並包覆弧形尾底面，且位於 排線相對移動路徑的上方。 【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’兹舉較佳實施例，並配合圖式加以說明如下。 请同時參考圖2及圖3’圖2為使用本發明第一實施 例排線防磨裝置的光碟機2〇，圖3為光碟機20之背面。 光碟機20包含機殼21、托盤22、主機板23及排線24。 主要為托盤22自由滑進滑出機殼21，排線24 —端連接於 托盤22的後端，另一端則連接設在機殼21後端的主機板 23，使托盤22滑進滑出機殼21時，托盤22與固定在機殼 21内的主機板23，仍可維持訊號的傳輸及控制。 其中，機殼21形成中空狀，機殼21前端具有一出口 25，兩側各設一導軌26，後側則設主機板23。托盤22兩 側端邊藉由導軌26的支撐，可由出口 25伸出或縮入機殼 21中，進行更換或播放光碟片。托盤22中心設置一主轴 馬達27,用以轉動光碟片28。托盤22另設置~讀取頭29, 可沿光碟片28的徑向移動，以讀寫光碟片28上的資料。 200905669 托盤22下方設-電路板3G，用以控制^ 頭29的運作:另在托盤22的前端連接—面板Μ，電= 30的下方覆A金屬的保護底板32，隨托盤^移動，以 防止電路板3G上的精密電子零件產生電磁干擾。 保護底板32尾端，作為防止電路板3〇受到撞擊的彎 緣’輕起形成一較大的圓弧狀端邊的弧形尾33。保護底板 32向内凹設-㈣34’條槽34的寬度略大於排線μ的寬 f，且位於排線24相對移動路徑上方，條槽％由保護底 板32弧形尾33的一端，|穿_ 成本發明的防磨裝置…面板31的另-端’以構 本發明之排線24為—軟性長條片狀的排線，以 FFC排線為例，基本上分為固定部⑶及活動部⑽兩部份。 固定部35 @-端連接於主機板23，其餘的固定部祁則朝 向出口 25的方向，平貼於機殼21的底面，且位於條槽料 的正下方。固定部35 #固定方式，可為黏貼或鉚固等方 式’而平貼的長度制機殼2!的近出口 25處，端視托般 22移動的距離而定。活動部36則由固定部犯位於機殼Μ ，口 25的一端延伸，反折向機殼21内部，並開頭疊置固 定在固定部35上，形成一折疊端37，接續的活動部祁則 未加以固定，僅係單純向内懸浮在固定部35上方，最後活 動4 36的另一端連接於托盤22的後側，亦即連接位於托 盤22底部的電路板30，使主機板23經由軟性排線24，與 電路板30產生電性連接。 〃 請再參圖2，本發明排線24防磨裝置作用時，排線％ 200905669 的固定部35平貼固定在機殼21上，使折疊端”靠近出口 25，托盤22牽引活動部36連接的一端反折外伸。當托盤 22推入機殼2卜反折外伸的排線24，在折疊端37引導及 托盤22後推的牽引，活動部36將依序平躺於固定部35 2如圖4所示折疊端37附近的剖面，保護底板32下的 龢'34，將滑過排線折疊端37的上方，由内凹的條槽％， =j板32與排線保持更大的間距，即使托盤推入機殼 3推壓或振動，鬆配合的導軌，讓賴絲Μ下沉（如 ^ 也不致讓條槽％接觸到排線折叠端仏同時， 34呆;H32歸彡尾的—端’貫穿至靠面板另—端的條槽 34 ’亦可確保保護底板&盘姑綠 端37後的排線被刮傷。，、_卜定間距，避免折疊 -底：明之光碟機排線防磨裝置，即可藉由在保 i條槽的防磨裝置，增大保護底板與排線間 於光碟機内部的排線。由於保護底板位 乃鱼屬板基本上只要能覆蓋住托盤下 磁干=盤；的電子零件，尤其是電路板，所產生的電 凹設條卜於㈣亚不要求’因此本發明在保護底板 斤有的可避免排線遭糊傷，既不會影響保護底板 ，又可避免更動光碟機機殼，降低製造的困難 ^4〇llXlltT/£ 盤42、主機板（圖未示）與碟機40包含機殼41、托 木）排線43、保護底板44及弧形尾 10 200905669 45基本上與第一實施例光碟機20機殼21、托盤22、主 機板23排線24、保護底板32及弧形尾33之連結結構及 同（叫參圖2),主要不同在於，本發明於保護底板 44所設的防磨裝置為_防磨層46。 .°亥防f層46設於保護底板44下側底面後端弧形尾45 附I覆蓋部份弧形尾45且位於排線43的正上方，防磨 層46_為防磨材質塗佈或黏貼在保護底板44所構成。如圖 6 I示為本發明排線43防磨裝置作用，當托盤42推入 機忒41盼，反折外伸的排線43，在折疊端47引導及托盤 42後推的牽引，活動部48將依序平躺於固定部49上。包 覆於弧形尾45底面的防磨層46首先接觸折疊端47，藉由 較大圓弧弧形尾45的緩衝’防磨層46在減少折疊端47磨 擦可輕易滑上折疊端47上的活動部48，使保護底板 44藉由防磨層46壓於活動部48上，由於防磨層46具有 子jsc门^塾局保護底板44，並使在防磨層4β後的保 濩底板44 ’與排線43活動部48維持在約防磨層46厚度 的距離，讓排線43避免與保護底板44接觸，以免被刮傷。 因此’本發明光碟機排線防磨裝置，即可藉由在保護 底板尾端設一防磨層’墊高保護底板與排線整體間距，以 防止排線遭到刮傷，同時配合保護底板尾端翹起較大圓弧 面的弧形尾，增強滑行的作用。同時，本發明光碟機排線 防磨裝置之防磨層，可直接在機殼上覆蓋或黏貼適當厚度 一防磨層，容易製造，且節省組裝及製造時間，不僅不需 更動機殼的表面，厚度有限的防磨層，亦可避免增加薄形 200905669 光碟機的厚度。 以上所述者，僅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。 【圖式簡單說明】 圖1為先前技術光碟機之側剖面圖。 圖2為使用本發明第一實施例排線防磨裝置光碟機之立體 圖。 圖3為本發明第一實施例光碟機之背面立體圖。 圖4為本發明第一實施例排線折疊端附近之剖面圖。 圖5為本發明第二實光碟機之背面侧剖面圖。 圖6為本發明第二實施例光碟機之示意側面剖視圖。 【主要元件符號說明】 20 第一實施例光碟機 21 機殼 22 托盤 23 主機板 24 排線 25 出口 26 導軌 200905669 27 主轴馬達 28 光碟片 29 讀取頭 30 電路板 31 面板 32 保護底板 33 弧形尾 34 條槽 35 固定部 36 活動部 37 折疊端 40 第二實施例光碟機 41 機殼 42 托盤 43 排線 44 保護底板 45 弧形尾 46 防磨層 47 折疊端 48 活動部The tray enters and exits, and the front end of the tray is connected to the A-panel. The row of wires has a fixed portion and a movable portion. The fixed portion is fixed to the casing, and the movable part is extended by the end of the fixed portion to form a folded end. The folded end solid soil U s is attached to the tray at the outlet of the sin. The movable part is connected to the tray at one end, and the bottom of the protection port is closed under the tray to protect the bottom end of the bottom plate to form an arc-shaped end. a fox-shaped tail, a groove recessed on the bottom surface of the protective bottom plate, and: above the relative moving path of the wire, the width of the groove is slightly larger than the twist of the wire, and the rear end of the curved tail of the protective plate is formed to The front end of the panel. 7 200905669 Another embodiment of the optical disc drive wire anti-wear device is arranged in a casing of an optical disc drive, the casing has an outlet for a tray to enter and exit, a row of wires has a fixed portion and a movable portion, and the fixed portion is fixed In the casing, the movable portion is reversely extended from one end of the fixed portion to form a folded end, the folded end is fixed near the outlet of the casing, one end of the movable portion is connected to the tray, and a protective bottom plate is covered under the tray to protect the bottom end of the bottom plate from being lifted. An arc-shaped tail having an arc-shaped end edge is formed, and an anti-friction layer is disposed on a bottom surface near the arc-shaped tail of the protection bottom plate, and is covered with the curved tail bottom surface, and is located above the relative moving path of the wire. [Embodiment] The present invention has been made in accordance with the preferred embodiments of the present invention in order to achieve the above object, and is described below with reference to the drawings. Referring to Fig. 2 and Fig. 3', Fig. 2 is a view showing an optical disk drive 2 of the first embodiment of the present invention, and Fig. 3 is a rear surface of the optical disk drive 20. The optical disk drive 20 includes a casing 21, a tray 22, a main board 23, and a wire 24. Mainly the tray 22 is free to slide in and out of the casing 21, the end of the wire 24 is connected to the rear end of the tray 22, and the other end is connected to the main plate 23 provided at the rear end of the casing 21, so that the tray 22 slides into and out of the casing. At 21 o'clock, the tray 22 and the motherboard 23 fixed in the casing 21 can maintain the transmission and control of the signal. The casing 21 is formed in a hollow shape, and the front end of the casing 21 has an outlet 25, and a guide rail 26 is disposed on each side, and a motherboard 23 is disposed on the rear side. The two side edges of the tray 22 are supported by the guide rails 26 and can be extended or retracted into the casing 21 by the outlet 25 for replacement or playback of the optical disk. A spindle motor 27 is disposed in the center of the tray 22 for rotating the optical disk 28. The tray 22 is further provided with a read head 29 which is movable in the radial direction of the optical disk 28 to read and write data on the optical disk 28. 200905669 The lower part of the tray 22 is provided with a circuit board 3G for controlling the operation of the head 29: another front panel of the tray 22 is connected to the panel Μ, and the bottom of the electric panel 30 is covered with a metal protective bottom plate 32, which is moved with the tray to prevent The precision electronic components on the board 3G generate electromagnetic interference. The rear end of the bottom plate 32 is protected as a curved tail 33 which is formed by a curved edge which prevents the circuit board 3 from being struck and which forms a large arc-shaped end. The protective bottom plate 32 is recessed inwardly - the width of the (four) 34' groove 34 is slightly larger than the width f of the wire μ, and is located above the relative moving path of the wire 24, and the groove % is protected by the end of the curved tail 33 of the bottom plate 32, _ The wear-resistant device of the invention ... the other end of the panel 31 is configured as a flexible strip-shaped cable, and the FFC cable is taken as an example, and is basically divided into a fixed portion (3) and an activity. Department (10) two parts. The fixing portion 35 @-end is connected to the main board 23, and the remaining fixing portions 平 are directed to the bottom surface of the casing 21 in the direction toward the outlet 25, and are located directly below the strip material. The fixing portion 35 #fixing means may be a method of pasting or staking, etc., and the near-outlet 25 of the length-made casing 2! which is flattened depends on the distance by which the tray 22 moves. The movable portion 36 is extended by the fixing portion at one end of the casing Μ, the mouth 25, and is folded back toward the inside of the casing 21, and is vertically stacked on the fixing portion 35 to form a folded end 37, and the movable portion is connected. It is not fixed, but is simply suspended inwardly above the fixing portion 35. The other end of the last activity 4 36 is connected to the rear side of the tray 22, that is, the circuit board 30 at the bottom of the tray 22 is connected, so that the motherboard 23 is connected via the flexible row. Line 24 is electrically connected to circuit board 30. 〃 Referring to FIG. 2 again, when the wire 24 of the present invention acts as an anti-wear device, the fixing portion 35 of the cable %200905669 is flatly fixed on the casing 21, so that the folded end is close to the outlet 25, and the tray 22 is pulled to the movable portion 36. One end of the reflexed extension is extended. When the tray 22 is pushed into the casing 2 and the retracted extension wire 24 is guided at the folding end 37 and pulled by the tray 22, the movable portion 36 will lie flat on the fixing portion 35. 2, as shown in Fig. 4, the section near the folded end 37, the bottom of the protective bottom plate 32 and '34, will slide over the upper end of the cable folding end 37, by the concave groove groove %, = j plate 32 and the wire retaining more Large spacing, even if the tray is pushed into the casing 3 to push or vibrate, loosely fitting the guide rails, let the linings sink down (such as ^ does not cause the groove to contact the folding end of the cable at the same time, 34 stay; H32 return The end of the tail-end's through the groove 34' of the other end of the panel can also ensure that the cable after the protection of the bottom plate & green end 37 is scratched., _ _ 定 spacing, avoid folding - bottom: Mingzhi The disc machine wire anti-wear device can increase the row between the protection bottom plate and the cable line inside the optical disc drive by the anti-wear device in the protection slot Line. Because the protection of the bottom plate is basically as long as it can cover the magnetic parts of the tray under the magnetic dry = disk; the electronic components, especially the circuit board, the electrical recess is not required to be required. The protection of the bottom plate can prevent the cable from being damaged, which will not affect the protection of the bottom plate, and can avoid the movement of the optical disk drive case, thereby reducing the manufacturing difficulty. ^4〇llXlltT/£ 42, the motherboard (not shown) and The disk drive 40 includes a casing 41, a pallet, a cable 43, a protective bottom plate 44, and a curved tail 10. 200905669 45 basically and the first embodiment of the optical disk drive 20 housing 21, the tray 22, the motherboard 23 line 24, protection The main structure of the bottom plate 32 and the curved tail 33 and the same structure (refer to FIG. 2) are mainly different in that the anti-wear device provided in the protective bottom plate 44 is a wear-resistant layer 46. The bottom end of the bottom surface of the bottom plate 44 is provided with an arc-shaped tail 45 covering the portion of the curved tail 45 and located directly above the wire 43. The wear-resistant layer 46_ is coated or adhered to the protective bottom plate 44. Fig. 6I shows the action of the anti-wear device of the cable 43 of the present invention. When the tray 42 is pushed into the casing 41, it is folded back. The extending wire 43 is guided at the folding end 47 and pulled back by the tray 42. The movable portion 48 will lie flat on the fixing portion 49. The wear-resistant layer 46 covering the bottom surface of the curved tail 45 first contacts the folded end. 47, by the buffering of the larger arcuate tail 45, the wear layer 46 can be easily slid onto the movable portion 48 on the folded end 47 by reducing the friction at the folded end 47, so that the protective bottom plate 44 is pressed by the wear layer 46. In the movable portion 48, since the wear-resistant layer 46 has the sub-jsc gate to protect the bottom plate 44, the protective bottom plate 44' and the wire 43 movable portion 48 after the wear-resistant layer 4β are maintained at a thickness of the wear-resistant layer 46. The distance of the cable 43 is prevented from coming into contact with the protective bottom plate 44 to avoid being scratched. Therefore, the optical disc machine wire anti-wear device of the present invention can prevent the cable from being scratched by protecting the bottom plate by providing an anti-friction layer at the end of the protection plate to raise the overall distance between the protection plate and the cable. The tail end lifts the curved tail of the larger arc surface to enhance the sliding effect. At the same time, the anti-friction layer of the anti-wear device of the optical disc drive of the present invention can directly cover or adhere to the appropriate thickness of the anti-friction layer on the casing, is easy to manufacture, and saves assembly and manufacturing time, and does not require more surface of the motive shell. The limited thickness of the wear layer can also avoid increasing the thickness of the thin 200905669 CD player. The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited to the preferred embodiments. All of them are within the scope of the patent application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side cross-sectional view of a prior art optical disk drive. Fig. 2 is a perspective view showing an optical disc drive using the wire anti-wear device of the first embodiment of the present invention. Figure 3 is a rear perspective view of the optical disk drive of the first embodiment of the present invention. Figure 4 is a cross-sectional view showing the vicinity of the folded end of the cable according to the first embodiment of the present invention. Figure 5 is a cross-sectional side view showing the second embodiment of the present invention. Figure 6 is a schematic side cross-sectional view showing an optical disk drive according to a second embodiment of the present invention. [Main component symbol description] 20 First embodiment Optical disk drive 21 Case 22 Tray 23 Main board 24 Cable 25 Exit 26 Guide rail 200905669 27 Spindle motor 28 Optical disc 29 Read head 30 Circuit board 31 Panel 32 Protective bottom plate 33 Curved Tail 34 slots 35 fixing portion 36 movable portion 37 folding end 40 second embodiment optical disk drive 41 housing 42 tray 43 cable 44 protection bottom plate 45 curved tail 46 wear layer 47 folding end 48 movable portion