1251824 玖、發明說明： (一） [發明所屬之技術領域] 本發明係有關對磁碟等之信號記錄媒體，具備實行讀取 ί 口號 或舄入柄號於在光學頭的物鏡驅動裝置。 (二） [先前技術] —般物鏡驅動裝置，裝有物鏡的鏡座（lens 】10】d er)由懸掛 (s u s p e n s 1 ο η )構件與框架（f r a m e )連結，並由此對框架能夠變 位鏡座地成彈性的支持構成。 作爲上述懸掛構件係多使用懸掛線（s u s p e n s i 〇 n w i r e )。一 般使用互相配置於平行的4條懸掛線，該等之一端固定在 安裝於框架的安裝板，另一端固定於鏡座予以架設。依此 由各懸掛線能夠變位地對框架彈性的支持鏡座。 可是於組立物鏡驅動裝置，欲架設懸掛線時，各懸掛線 係最初分別插入形成在安裝板的各孔，其次插入於設在鏡 座的孔。然後由軟焊或黏合劑固定於安裝‘板及鏡座。 又鏡座，安裝有聚焦線圈（f 〇 c u s i n g C 0 i 1)及追踪線圈 (tracking coil)之各驅動線圈構成致動器可動部。然後，將 對鏡座之各驅動線圈有效邊照設計樣的應形成磁性電路的 永久磁鐵及磁性軛，配置於框架。 並由該等之理由，欲架設固定懸掛構件之際，有設置鏡 座於框架之規定位置的必要。 司是，欲設置鏡座在框架Z規定位置時，乃使用專用之 組立治具來實行。 因此，安裝鏡座的位置精度由組立治具的設置位置參差 -6- 1251824 不齊所左右，同時由於需要組立治具在作業性有問題。又 作成組立治具爲能夠設置有需要考慮框架及鏡座的形狀者。 又由於不能確保鏡座之安裝位置精度，於鏡座側及框架 側的各懸掛構件之一端側及另一端側支持位置產生參差不 齊，產生固定各懸掛構件位置之不均衡。因此，追踪或聚 焦時之物鏡變位時變化物鏡之姿勢，有招來劣化光學性能 的問題。 (三） [發明內容] 本發明係於框架一體成形具有插入用來確保鏡座的物鏡光 程之光程用孔用突起的定位構件，由於將該突起插入鏡座 之光程用孔對該框架實行定位鏡座，以實行定位該鏡座狀 態對框架變位可能地支持鏡座，架設懸掛構件在框架及鏡 座，由該懸掛構件以支持鏡座於框架狀態作爲從鏡座去除 該定位構件。由此對框架以提高鏡座的設置位置精度，不 用組立治具將懸掛構件架設在框架及鏡座，以架設該懸掛 構件狀態，由定位構件作爲解除限制鏡座者。 (四） [實施方式] [實施例] 第1圖係關於本發明物鏡驅動裝置之主要部分展開狀態 ’其係從底面側所表示之展開斜視圖，第2圖係第丨圖所 示物鏡驅動裝置之組立狀態，其係從底面側所表示之斜視 圖，第3圖係第1圖所示物鏡驅動裝置之組立完成狀態， 其係從上面側所表示之斜視圖。 框架1由p p s (聚苯硫醚）或聚碳酸酯等之高強度合成樹 1251824 脂一體成形，設置於組裝入半導體雷射或光檢測器的光學 殼（未圖示），同時與§亥等構成光學頭。 鏡座2形成有確保物鏡3光程於安裝物鏡3部分的光程 用孔4。又鏡座2配置有包圍鏡座2之側面全圍所卷繞的 聚焦線圈5，及分別卷繞於2個鏡座2之有效邊各兩側的 追£示線圈6 ◦ 框架1係一體形成，夾住鏡座2而相對，從框架兩側壁 分別向內側突出所設定位構件7、8。各定位構件7、8之 前端形成有分別插入鏡座2之光程用孔4的突起7 a、8 a。 又該定位構件7、8分別頂接鏡座2，設置支持該構件的 肋7b、8b。各肋7b、8b係用於設定鏡座2之物鏡3光軸 方向的設置位置。 其次’說明依如此構成零件所成物鏡驅動裝置之組立方 法。 首先’用自動機卷繞的聚焦線圈5及追踪線圈6之各驅 動線圈裝於_座2。使此鏡座2，從框架1之底面側能插入 各疋位構件7、8之突起7 a、8 a於光程用孔4，設置在框架 各定位構件7、 由於互相作分離設置，賦予各定位構件 彈性。並由此彈性容易或確實地繫合鏡座2於各定位 構件7、8。 欲設置鏡座2在 繫合各突起7a、 定於鏡座2與物鏡 在框木1 Ζ際’如第5圖之剖面圖所示， 8 a之前端爪部在光程用孔4緣部。由此設 鏡3光軸正交方向的設置位置。又定位構 -8- 1251824 件7、8之各肋7 b、8 b係頂接裝設鏡座2之物鏡3的上面 ，由此設定鏡座2於物鏡3光軸方向的設置位置。 如此作成之鏡座2乃設置在框架1之規定位置，故以此 狀態將鏡座2對框架1，支持成能夠變位於聚焦方向及追 踪方向架設各懸掛線1 〇在框架i及鏡座2，而作固定。 由軟焊固定各懸掛線1 〇終端的配線基板11，係以螺絲 固定在框架1之規定端面。配線基板n設有插入各懸掛線 1 0的孔1 1 a，使用成旋轉狀的治具（未圖示）插通各懸掛線 1 〇於該等孔1 1 a。各懸掛線1 〇係通過框架1之懸掛線插通 空間2 0後，從鏡座2相對的規定之2側面中央上下插通於 分別突出形成在各支持部1 2的孔1 2 a。又，該懸掛線插通 空間2 0架設各懸掛線1 〇後，充塡阻尼劑。 在此狀況，由定位構件7、8設置鏡座2於框架1之規定 位置，故從配線基板1 1各孔插通各懸掛線1 〇係圓滑地插 入各支持部1 2之孔1 2 a。又，弄歪各懸掛線1 〇使應力殘 留於懸掛線予以減輕。 然後，各懸掛線1 〇之前端部，係附設配置於卷住聚焦線 圈5及追踪線圈6各驅動線圈之規定末端的鏡座1之各突 片13。 各懸掛線1 0係於前端部軟焊固定在該各突片1 3，於終 端部軟焊固定於配線基板U，於各支持部1 2之孔1 2 a部 分由紫外線硬化型式之黏合劑黏接在鏡座2。 作爲如此架設各懸掛線1 〇以鏡座1支持鏡座2。 乂，在框架1，予以設置產生有效磁場在鏡座2各驅動 -9- 1251824 線圈有效區域的磁性電路。此磁性電路由：具備一對永久 磁鐵1 4、1 5，互相相對配置相同磁極；及分別附設此各永 久磁鐵1 4、1 5的背軛部及相對各永久磁鐵1 4、1 5之規定 磁極面相對軛部的各軛1 6、1 7所構成。各軛1 6、1 7係由 黏合劑固定在框架1之規定位置。 如此，與架設各懸掛線1 〇，同時形成磁性回路狀態’從 鏡座1之側壁翻折去除各定位構件7、8。由此，解除以各 定位構件7、8的鏡座2之位置限制。 由此，鏡座2係對合焦光束於磁碟信號面的聚焦控制及 磁碟之信號軌道，使其追隨光束能實行追踪控制成變位可 能地支持狀態。 在此，在各定位構件7、8之根部分，在上面側分別形成 有槽1 8、1 9，並由此各槽1 8、1 9形成各定位構件7、8， 而成爲容易翻折去除。因此，容易地從根部分確實去除各 定位構件7、8，並不會由各定位構件7、8阻礙鏡座2之 變位。 去除了各定位構件7、8，以黏合劑黏接固定物鏡3於鏡 座2之光程用孔4上規定位置。 作成如此，如第4圖所示’完成組立物鏡驅動裝置，於 此狀態以變位可能地支持鏡座2於框架1。又因配置各驅 動線圈之有效區域在有效磁場內，故由於供給聚焦控制信 號於聚焦線圈5因應其聚焦信號’藉由鏡座2能向聚焦方 向驅動物鏡3。再者，由於供給追踪控制信號於各追踪線 圈6，因應其追踪控制信號藉由鏡座2能向追踪方向驅動 1251824 物鏡3。 可是，鏡座2以一體成形在框架1的各定位構件7、8所 限制位置而設置。又，此各定位構件7、8由成形框架1的 尺寸精度予以設定位置。 因而’將鏡座2之設置位置能對框架1設在規定位置。 結果’不殘留應力，對架設各懸掛線1 〇有利，提高了配置 鏡座2的位置精度，同時解除由各定位構件7、8對鏡座的 位置限制之際，成爲物鏡3產生光軸偏移困難的構成。 [發明之效果] 如以上依本發明，由一體成形鏡座在框架的定位構件作 位置限制配置於框架，故不使用爲了設置鏡座的組立治具 能配置鏡座於框架之規定位置，作業性良好，同時對組立 治具之尺寸精度及設置參差不齊無關，能實現框架以一體 成形的零件尺寸，可以謀求提高鏡座的安裝位置精度。 特別是’將該定位構件從鏡座之兩側壁分別向內側突出 設置，分別形成於各定位構件的各突起分別插入鏡座之光 程用孔’作成繫合在其光程用孔之緣部，故爲了繫合於各 定位構件’不必要變更鏡座之形狀，同時由於賦予彈性在 各定位構件，容易地能穩健的繫合鏡座。 又於該定位構件在鏡座之物鏡光軸方向，應予設定設置 位置設置頂接支持鏡座的肋，故亦能在鏡座之物鏡光軸方 向實行設定設置位置。 (五）[圖式簡單說明] 第1圖 關於本發明物鏡驅動裝置之主要部分展開狀態 KM 824 ’其係從底面側所表示的展開斜視圖。 第2圖第1圖所示物鏡驅動裝置之組立狀態，其係從底 面側所表示的斜視圖。 第3圖第1圖所示物鏡驅動裝置之組立狀態，其係從上 面側所表示的斜視圖。 第4圖第1圖所示物鏡驅動裝置之組立完成狀態，其係 從上面側所表示的斜視圖。 弟5圖表不設置纟見座2在框架1狀態剖面圖。 [主要部分之代表符號說明] 1 框 架 2 鏡 座 3 物 鏡 4 光 程 用 孔 5 聚 焦 線 圈 6 追 線 圈 7、 8 定 位 構 件 7a、 8a 突 起 7b、 8b 肋 10 懸 掛 線 11 基 板 12 支 持 部 1 1 a 、12a 孔 13 突 片 14、 15 永 久 磁 鐵 16、 17 軛 18、 19 槽 20 空 間(1) [Technical Field of the Invention] The present invention relates to a signal recording medium for a magnetic disk or the like, which is provided with an objective lens driving device that performs reading of a slogan or a handle number on an optical head. (2) [Prior Art] - The objective lens driving device, the lens holder (lens 10) d er) equipped with the objective lens is connected by a suspension (suspens 1 ο η ) member and a frame, and thus the frame can be changed The lens holder is constructed of elastic support. Suspension lines (s u s p e n s i 〇 n w i r e ) are often used as the suspension member. Generally, four suspension wires arranged in parallel with each other are used, and one of the ends is fixed to a mounting plate mounted to the frame, and the other end is fixed to the lens holder for erection. According to this, the suspension frame can be displaced to the support frame of the frame elastically. However, in the case of the objective lens driving device, when the suspension wires are to be erected, the suspension wires are initially inserted into the respective holes formed in the mounting plate, and secondly inserted into the holes provided in the mirror holder. It is then fixed to the mounting plate and mirror mount by soldering or adhesive. Further, the lens holder, each of which is provided with a focus coil (f 〇 c u s i n g C 0 i 1) and a tracking coil constitutes an actuator movable portion. Then, a permanent magnet and a magnetic yoke which are to be formed into a magnetic circuit by effectively designing the respective driving coils of the lens holder are disposed in the frame. For these reasons, it is necessary to provide a fixed position of the mirror to the frame when the suspension member is to be erected. Therefore, when the mirror seat is to be placed at the position specified by the frame Z, it is implemented using a dedicated set of jigs. Therefore, the positional accuracy of the mounting lens holder is different from the setting position of the assembly jig -6-1251824, and there is a problem in the workability due to the need to assemble the jig. It is also possible to set up a set of fixtures to be able to set the shape of the frame and the mirror base. Further, since the mounting position accuracy of the lens holder cannot be ensured, the support positions on the end side and the other end side of each of the suspension members on the mirror side and the frame side are uneven, and the position of each suspension member is unevenly fixed. Therefore, changing the posture of the objective lens when the objective lens is displaced during tracking or focusing has a problem of deteriorating optical performance. (3) [Summary of the Invention] The present invention is integrally formed in a frame with a positioning member having a projection for inserting an optical path for ensuring the optical path of the objective lens of the lens holder, and the projection is inserted into the optical path hole of the lens holder. Positioning the lens holder to perform positioning of the lens holder state may support the lens holder for the frame displacement, and suspend the suspension member at the frame and the lens holder, and the suspension member supports the lens holder in the frame state as the positioning member is removed from the lens holder. Thereby, the frame is positioned to improve the positional accuracy of the lens holder, and the suspension member is erected on the frame and the mirror base without using a set jig to erect the state of the suspension member, and the positioning member is used as the release lens holder. (4) [Embodiment] [Embodiment] Fig. 1 is a perspective view showing an unfolded state of a main portion of an objective lens driving device according to the present invention, which is an exploded perspective view from the bottom surface side, and Fig. 2 is an objective lens driving diagram shown in Fig. 2 The assembled state of the apparatus is an oblique view from the bottom side, and the third drawing is an assembled state of the objective lens driving device shown in Fig. 1, which is a perspective view from the upper side. Frame 1 is integrally formed of high-strength synthetic tree 1251824 grease such as pps (polyphenylene sulfide) or polycarbonate, and is disposed in an optical housing (not shown) incorporated in a semiconductor laser or photodetector, and Forms an optical head. The lens holder 2 is formed with a hole 4 for ensuring the optical path of the objective lens 3 in the portion where the objective lens 3 is mounted. Further, the lens holder 2 is provided with a focus coil 5 wound around the side of the lens holder 2, and a tracking coil 6 which is wound around each of the effective sides of the two lens holders 2, and the frame 1 is integrally formed. When the lens holder 2 is clamped, the set position members 7, 8 are respectively protruded inward from both side walls of the frame. The front ends of the respective positioning members 7, 8 are formed with projections 7a, 8a which are respectively inserted into the optical path holes 4 of the lens holder 2. Further, the positioning members 7, 8 are respectively attached to the mirror holder 2, and ribs 7b, 8b for supporting the members are provided. Each of the ribs 7b, 8b is for setting the position of the objective lens 3 in the optical axis direction of the lens holder 2. Next, the group cubic method of the objective lens driving device formed by the components is described. First, the respective drive coils of the focus coil 5 and the tracking coil 6 wound by the robot are mounted on the yoke 2. The lens holder 2 can be inserted into the optical path hole 4 from the bottom surface side of the frame 1 into the projections 7a, 8a of the respective clamping members 7, 8 and disposed on the frame positioning members 7, respectively. Each positioning member is elastic. Thereby, the lens holder 2 is easily or surely coupled to each of the positioning members 7, 8. To set the lens holder 2 to align the protrusions 7a, the lens holder 2 and the objective lens in the frame 1 as shown in the cross-sectional view of Fig. 5, the end claws are at the edge of the optical path hole 4 before 8 a. . Thereby, the installation position of the optical axis of the mirror 3 in the orthogonal direction is set. Further, the ribs 7 b, 8 b of the positioning blocks -8 to 1251824 are attached to the upper surface of the objective lens 3 of the lens holder 2, thereby setting the position of the lens holder 2 in the optical axis direction of the objective lens 3. The mirror base 2 thus formed is disposed at a predetermined position of the frame 1, so that the lens holder 2 is supported in the state of the frame 1 so as to be able to be positioned in the focusing direction and the tracking direction to hang the suspension wires 1 in the frame i and the lens holder 2 And fixed. The wiring board 11 of each of the suspension wires 1 is fixed by soldering, and is fixed to a predetermined end surface of the frame 1 by screws. The wiring board n is provided with a hole 1 1 a inserted into each of the suspension wires 10, and the suspension wires 1 are inserted into the holes 1 1 a using a rotating jig (not shown). Each suspension wire 1 is inserted into the space 20 through the suspension wire of the frame 1, and then inserted into the hole 1 2 a which is formed to protrude from each of the support portions 12 from the center of the predetermined two side faces of the lens holder 2. Further, the suspension wire insertion space 20 is provided with each suspension wire 1 〇 and is filled with a damping agent. In this case, since the positioning members 7 and 8 are provided with the lens holder 2 at a predetermined position of the frame 1, the suspension wires 1 are inserted from the respective holes of the wiring substrate 1 and are smoothly inserted into the holes 1 2 a of the respective support portions 1 2 . . In addition, the suspension line 1 is smashed to reduce the stress remaining on the suspension line. Then, the respective projections 13 of the lens holder 1 disposed at the predetermined ends of the drive coils of the focus coil 5 and the tracking coil 6 are attached to the front end portions of the suspension wires 1 。. Each of the suspension wires 10 is soldered and fixed to the respective tabs 13 at the distal end portion, and is soldered and fixed to the wiring substrate U at the end portion, and the ultraviolet-cured type adhesive is partially formed in the hole 1 2 a of each support portion 12 Bonded to the lens holder 2. As such, each of the suspension wires 1 is erected, and the lens holder 2 is supported by the lens holder 1.乂, in the frame 1, the magnetic circuit that generates the effective magnetic field in the effective area of the lens mount 2 drive -9- 1251824 coil is set. The magnetic circuit includes: a pair of permanent magnets 14 and 15; and the same magnetic poles are disposed opposite to each other; and the back yoke portions of the permanent magnets 14 and 15 and the respective permanent magnets 14 and 15 are attached The magnetic pole faces are formed by the yokes 16 and 17 of the yoke. Each of the yokes 16 and 17 is fixed to a predetermined position of the frame 1 by an adhesive. Thus, the positioning members 7 and 8 are removed from the side wall of the mirror holder 1 by erecting the suspension wires 1 〇 while forming the magnetic circuit state. Thereby, the positional restriction of the lens holder 2 of each of the positioning members 7, 8 is released. Thus, the lens holder 2 controls the focus of the focus beam on the signal surface of the disk and the signal track of the disk so that the following beam can be tracked and controlled to be in a position to support the displacement. Here, at the root portion of each of the positioning members 7, 8, grooves 18 and 19 are formed on the upper surface side, and thus the respective grooves 18, 19 form the positioning members 7, 8 to be easily folded. Remove. Therefore, it is easy to surely remove the positioning members 7, 8 from the root portion, and the displacement of the lens holder 2 is not hindered by the respective positioning members 7, 8. Each of the positioning members 7, 8 is removed, and the fixing objective lens 3 is adhered to the optical path hole 4 of the mirror holder 2 at a predetermined position by an adhesive. Thus, as shown in Fig. 4, the assembly objective lens driving device is completed, and in this state, the lens holder 2 is supported by the frame 1 in a state of displacement. Further, since the effective area of each of the driving coils is disposed in the effective magnetic field, the objective lens 3 can be driven in the focusing direction by the lens holder 2 by supplying the focus control signal to the focus coil 5 in response to the focus signal. Further, since the tracking control signal is supplied to each of the tracking coils 6, the lens holder 2 can drive the 1251824 objective lens 3 in the tracking direction in response to the tracking control signal. However, the mirror base 2 is integrally formed at a restricted position of each of the positioning members 7, 8 of the frame 1. Further, each of the positioning members 7, 8 is set at the positional accuracy of the forming frame 1. Therefore, the position where the lens holder 2 is placed can be set at a predetermined position to the frame 1. As a result, "there is no residual stress, which is advantageous for erecting each of the suspension wires 1 , and the positional accuracy of the arrangement of the lens holder 2 is improved, and the positional limitation of the lens holder by the respective positioning members 7 and 8 is released, and the optical axis deviation of the objective lens 3 is caused. The difficulty of moving the composition. [Effect of the Invention] According to the present invention, since the positioning member of the frame is disposed at the position of the frame by the integrally formed mirror holder, the position of the lens holder can be arranged at a predetermined position of the frame without using the assembly jig for providing the lens holder. The performance is good, and the dimensional accuracy and setting of the assembly jig are irrelevant, and the size of the part formed by the frame can be realized, and the mounting position accuracy of the lens holder can be improved. In particular, the positioning member is protruded inward from both side walls of the mirror holder, and the projections formed in the respective positioning members are respectively inserted into the optical path holes of the lens holder to be coupled to the edge of the optical path hole. Therefore, in order to be attached to each of the positioning members, it is not necessary to change the shape of the lens holder, and at the same time, it is easy to firmly mate the lens holder by imparting elasticity to each of the positioning members. Further, in the direction of the optical axis of the objective lens of the lens holder, the rib of the support lens holder should be set at the set position, so that the setting position can be set in the optical axis direction of the objective lens of the lens holder. (5) [Simplified description of the drawings] Fig. 1 is a perspective view showing a state in which the main portion of the objective lens driving device of the present invention is unfolded, and KM 824' is a developed perspective view from the bottom surface side. Fig. 2 is a perspective view showing the state in which the objective lens driving device is assembled, which is shown from the bottom side. Fig. 3 is a perspective view showing the assembled state of the objective lens driving device shown in Fig. 1 from the upper side. The assembled state of the objective lens driving device shown in Fig. 4 and Fig. 1 is a perspective view from the upper side. The brother 5 chart is not set to view the state of the frame 2 in the frame 1 state. [Description of main symbols] 1 Frame 2 Mirror base 3 Objective lens 4 Path length hole 5 Focus coil 6 Chasing coil 7, 8 Positioning members 7a, 8a Projections 7b, 8b Ribs 10 Suspension line 11 Substrate 12 Support part 1 1 a , 12a hole 13 tab 14, 15 permanent magnet 16, 17 yoke 18, 19 slot 20 space