1335022 九、發明說明： 【發明所屬之技術領域】 匕辦磧取 本發明涉及一種彈片，尤係一種用於固定光子β 頭導桿之彈片。 【先前技術】 ^諜遊戲 在習知光碟機中例如CD、VCD、DVD及先沒'，岛馬 機等，光學讀取頭進給機構通常安裝於機芯上，逸 達驅動讀取頭沿著光碟之徑向移動，從而對光蝶進行冰1335022 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a shrapnel, and more particularly to a shrapnel for fixing a photon beta head guide. [Prior Art] The spy game is in the CD-ROM, such as CD, VCD, DVD, and the first, the island horse machine, etc., the optical pickup feed mechanism is usually mounted on the movement, the escape drive read head edge Radial movement of the disc to ice the butterfly
取/寫入操作。 光學讀取頭在前後移動時需要靠導桿來固定其位 置與移動方向，而導桿又必須由彈片固定在基座上，如 圖1所示係習知之一種光學讀取頭導桿固定彈片10,其 主體部11設有複數固定孔12,其主體部11兩側垂直向 上延伸形成兩側壁14,該光學讀取頭導桿固定彈片10 之主體部11中部向上彎折後又斜向延伸形成矩形懸臂 16 ’該懸臂16用於抵壓導桿20,由於矩形懸臂16之接 觸面積較大，導桿20在安裝、拆卸過程中會使矩形懸 臂16產生永久變形，導致該懸臂16不能正常卡固導桿 20，影響該光學讀取頭導桿固定彈片10之使用功能^ 使用壽命。 【發明内容】 鑒於以上内容，有必要提供一種能減小彈片永久带 變之光學讀取頭導桿固定彈片。 / 一種光學讀取頭導桿固定彈片，其包括—主體部， ，主體部中部向上彎折後斜向延伸形成下寬上窄之懸 臂。 名二上述光學讀取頭導桿固定彈片採用下寬上窄之殮 =設計，增強了懸臂之抗變形能力，提高了光學讀取g 導桿固定彈片之使用壽命。 6 1335022 【實施方式】 圖2係本發明光學讀取頭導桿固定彈片較佳實施 方式之立體圖，一種光學讀取頭導桿固定彈片30,其 主體部31設有複數固定孔32，其主體部31兩側垂直 向上延伸形成兩側壁34,該光學讀取頭導桿固定彈片 30之主體部31中部還向上彎折後斜向延伸形成下寬上 窄之凸形懸臂36，該凸形懸臂36用於抵壓導桿20。 再參考圖1及表1，可以看出該光學讀取頭導桿固 定彈片30之凸形懸臂36之最大應力與習知光學讀取頭 導桿固定彈片10之矩形懸臂16相近，而兩種形狀懸臂 之接觸力差異也不大，則表示該凸形懸臂36在抵壓導 桿20方面之效果與習知之矩形懸臂16相近。 表1 :兩種形狀懸臂之最大應力與接觸力 懸臂形狀 最大應力(MPa) 接觸力(N) 矩形 1043 32.83 凸形 1055 32.39 繼續參考表2，在安裝、拆卸導桿20時，習知之 光學讀取頭導桿固定彈片10之矩形懸臂16最高點之永 久變形達到了 3.08mm，其傾斜角度增大1.213度，而 本發明光學讀取頭導桿固定彈片30之凸形懸臂36由於 減小受力面積及使應力分佈更加均勻，其最高點之永久 變形僅爲2.49mm，其傾斜角度改變爲1.007度，相較 習知技術中之矩形懸臂16本發明光學讀取頭導桿固定 彈片30之凸形懸臂36之永久變形降低了 19.15%，傾 斜角度減小11.21%，抗變形能力明顯增強。 7 表2 :兩種形狀懸臂之永久變形與改變角度 懸臂形狀 懸臂最高點之永久變形 (mm ) 懸臂斜面之改變角度 (度） 矩形 3.08 1.213 凸形 2.49 1.007 1335022 由於該光學讀取頭導桿固定彈片30之凸形懸臂36 相較習知技術中矩形懸臂16降低了最高點之永久變形 和改變角度，從而提高了光學讀取頭導桿固定彈片30 之使用功能，延長其使用壽命。 綜上所述，本發明符合發明專利要件，爰依法提出 專利申請。惟，以上所述者僅為本發明之較佳實施例， 舉凡熟悉本案技藝之人士，在爰依本發明精神所作之等 效修飾或變化，皆應涵蓋於以下之申請專利範圍内。 【圖式簡單說明】 圖1係習知一種光學讀取頭導桿固定彈片之立體 圖。 圖2係本發明光學讀取頭導桿固定彈片較佳實施方 式之立體圖。 【主要元件符號說明】 [習知] 光學讀取頭 10 主體部 11 導桿固定彈片 固定孔 12 侧壁 14 懸臂 16 導桿 20 [本發明] 光學讀取頭 30 主體部 31 導桿固定彈片 固定孔 32 側壁 34 8 ⑧ 1335022Take/write operation. The optical pickup requires a guide rod to fix its position and moving direction when moving forward and backward, and the guide rod must be fixed on the base by the elastic piece. As shown in FIG. 1 , an optical pickup guide rod fixed elastic piece is known as shown in FIG. 1 . 10, the main body portion 11 is provided with a plurality of fixing holes 12, and the two sides of the main body portion 11 extend vertically upward to form two side walls 14. The central portion 11 of the optical pickup head guide elastic piece 10 is bent upward and then obliquely extended. Forming a rectangular cantilever 16 'the cantilever 16 is used to press the guide rod 20. Since the contact area of the rectangular cantilever 16 is large, the guide rod 20 will permanently deform the rectangular cantilever 16 during installation and disassembly, resulting in the cantilever 16 not being normal. The fixing guide 20 affects the function of the optical pickup head fixing elastic piece 10 and its service life. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide an optical pickup guide rod fixing elastic piece capable of reducing the permanent change of the elastic piece. An optical pickup guide rod fixing elastic piece, comprising: a main body portion, wherein a central portion of the main body portion is bent upward and then obliquely extends to form a lower width and a narrow cantilever. The second optical optical head guide rod fixed elastic piece adopts a lower width and a narrower 殓= design, which enhances the anti-deformation ability of the cantilever and improves the service life of the optical reading g guide rod fixed elastic piece. 6 is a perspective view of a preferred embodiment of the optical pickup guide rod fixing elastic piece of the present invention. The optical pickup head guide rod fixing elastic piece 30 has a main body portion 31 provided with a plurality of fixing holes 32, and a main body thereof. The two sides of the main body portion 31 of the optical pickup head guide elastic piece 30 are also bent upwardly and then obliquely extended to form a lower wide and narrow convex cantilever 36, the convex cantilever 36 is used to press the guide rod 20. Referring again to FIG. 1 and Table 1, it can be seen that the maximum stress of the convex cantilever 36 of the optical pickup guide rod fixing elastic piece 30 is similar to that of the rectangular cantilever 16 of the conventional optical pickup guide rod fixing elastic piece 10, and two types. The difference in contact force of the shape cantilever is also small, indicating that the convex cantilever 36 has an effect in resisting the guide rod 20 that is similar to the conventional rectangular cantilever 16. Table 1: Maximum stress and contact force of two shapes of cantilever Shape Maximum stress (MPa) Contact force (N) Rectangular 1043 32.83 Convex 1055 32.39 Continuing with reference to Table 2, conventional optical reading when mounting and dismounting the guide rod 20 The permanent deformation of the highest point of the rectangular cantilever 16 of the take-up guide fixing elastic piece 10 reaches 3.08 mm, and the inclination angle thereof is increased by 1.213 degrees, and the convex cantilever 36 of the optical pickup guide rod fixing elastic piece 30 of the present invention is reduced by The force area and the stress distribution are more uniform, the permanent deformation of the highest point is only 2.49 mm, and the inclination angle is changed to 1.007 degrees, compared with the rectangular cantilever 16 of the prior art. The optical pickup guide rod fixing elastic piece 30 of the present invention The permanent deformation of the convex cantilever 36 is reduced by 19.15%, the inclination angle is reduced by 11.21%, and the deformation resistance is remarkably enhanced. 7 Table 2: Permanent deformation of two cantilever shapes and changing angles Cantilever shape Permanent deformation of the highest point of the cantilever (mm) Change angle of the cantilever slope (degrees) Rectangular 3.08 1.213 Convex 2.49 1.007 1335022 Due to the optical pickup guide rod fixed The convex cantilever 36 of the elastic piece 30 reduces the permanent deformation and the angle of change of the highest point compared with the rectangular cantilever 16 in the prior art, thereby improving the function of the optical pickup head fixing elastic piece 30 and prolonging its service life. In summary, the present invention complies with the requirements of the invention patent, and proposes a patent application according to law. However, the above-mentioned embodiments are merely preferred embodiments of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a conventional optical pickup guide rod fixing elastic piece. Fig. 2 is a perspective view showing a preferred embodiment of the optical pickup guide rod fixing elastic piece of the present invention. [Main component symbol description] [Generally known] Optical pickup head 10 Main body portion 11 Guide rod fixing elastic plate fixing hole 12 Side wall 14 Cantilever 16 Guide rod 20 [Invention] Optical pickup head 30 Main body portion 31 Guide rod fixing elastic piece fixing Hole 32 side wall 34 8 8 1335022