200849728 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種軟性印刷電路板，尤有關一種可有效避免其於遭 受不當揷拔動作時之損傷的軟性印刷電路板端子結構。 【先前技術】 當一液晶模組與手持式電子裝置例如手機搭配時，常利用軟性印刷 電路板(flexible printed circuit board ; FPC)作為通路橋接，且該軟性印刷 電路板置入一連接器之端子側通常由零出力插槽交錯式針腳(zer〇 insertion force pin; ZIF pin)所構成。 圖1為示意圖，顯示目前習用的ZIF交錯式針腳1〇2之走線方式。 如圖1所示，目前ZIF交錯式針腳102的走線方式，其沿針腳長軸方向 的尺寸會急遽變化而產生多個轉折點(例如圖示之G點' Η點、I點、j 點），於針腳彎折受力時’該些轉折點容易造成應力集中現象。圖2為顯 示軟性印刷電路板100相對一連接器1〇4進行揷拔動作之示意圖。如圖2 所示，當軟性印刷電路板100置入於連鄕綱時，連結器1〇4的彈片 106係壓著軟性印刷電路板1〇〇的ZIF交錯式針腳1〇2，因此，若未將彈 片106完全移開即進行揷拔動作或揷拔角度不佳，交錯式針腳1〇2合於 彎折時的受力針區域處斷裂，崎_置通常位於上述造成應力^中 現象的轉折點處(例如沿圖丨所示的A_A，線斷裂）。 【發明内容】 壽命及可靠度 依本發明之設計， 一因此’本發明之目的在提供一種軟性印刷冑路板端子結構 f避免巧州·升娜噴路板的掃拔 ‘種軟性印刷電路板端子結構包含魏第一針腳 6 200849728 針腳，且第-針腳與第二針聊兩者具有不同的外型。各個針 :=方向娜平行’各個第一及第二針腳於與其長軸方向實質 側邊且古t上父替排列’且沿長軸方向延伸之__第—及第二針聊 側1'有大致相同的走向。各該針腳於沿長軸方向延伸之側邊上具有至 ==部輪廓不連續變化形成之階梯部(steppGrtiGn)，並至少於該些階 梯损各端_臟有-_。再者，該麵腳鄰近該連接器一侧 7梯部於該長軸方向上之投影長度以大於025mm較佳，且形成於階梯 部兩端之導圓角其導圓半徑以大於018mm較佳。 藉由本發明之設計，當階梯部兩端進行導圓角設計，可緩和針腳的 厚度變化達_滑分散應力的效果，如此若有不當揷拔動作產生時，例 如未將連接H彈片完全移開即進行揷拔動作或揷拔角度不佳，具圓弧導 角之針腳可有效分散應力戦於輪廓變化處斷裂或造成其他損傷，另 外，本發明可藉由最佳化受力集中區域中的階梯部間距、同時搭配導圓 角的叹计’進-步避免因不當揷拔動作造成的軟性印刷電路板端子結構 損傷問題，大幅提升軟性印刷電路板的揷拔壽命及可靠度。 【實施方式】 圖3為一不意圖，顯示本發明軟性印刷電路娜以脇神伽 board，FPC)‘子結構12之-實施例。該軟性印刷電路板可透過捲帶式 #t(tape carrier packaging ； TCP)^；#^t aa^^t(chip on film ； COF),|, 載一驅動晶片，且該端子結構12置入如圖2所示連接器1〇4之連接位置， 以使軟性印刷電路板提供其他電子元件間的電連接效果。 如圖3所示，軟性印刷電路板端子結構12為多個具不同外型之第一 針腳(pin)12a及第二針腳12b所構成，各個針腳之長軸方向（圖上設為χ 方向)彼此平行，且第一針腳12a與第二針腳12b於與長軸方向垂直之方 200849728 向(γ方向)上交替排列，再者，第一針腳仏及第二針腳12b沿長轴方向 延伸的兩相鄰側邊14a及14b，具有大致相同的走向。 依本實施例之設計，各個針腳於沿錄方向延伸之㈣上具有因外 部輪廓不連、續變化形成之階梯部(stepp〇rti〇n)s，舉例而言，第一針腳仏200849728 IX. Description of the Invention: [Technical Field] The present invention relates to a flexible printed circuit board, and more particularly to a flexible printed circuit board terminal structure which can be effectively prevented from being damaged by improper pulling action. [Prior Art] When a liquid crystal module is matched with a handheld electronic device such as a mobile phone, a flexible printed circuit board (FPC) is often used as a path bridge, and the flexible printed circuit board is placed in a connector terminal. The side is usually composed of a zero output force slot (ZIF pin). Figure 1 is a schematic diagram showing the conventional ZIF interleaved pin 1〇2 routing. As shown in FIG. 1 , the current ZIF interlaced pin 102 has a sharp change in the dimension along the long axis of the pin to generate a plurality of turning points (for example, G point 'Η point, I point, j point in the figure). When the stitches are bent and stressed, these turning points are likely to cause stress concentration. Fig. 2 is a view showing the drawing operation of the flexible printed circuit board 100 with respect to a connector 1?4. As shown in FIG. 2, when the flexible printed circuit board 100 is placed in the chain, the elastic piece 106 of the connector 1〇4 is pressed against the ZIF staggered pin 1〇2 of the flexible printed circuit board 1 When the elastic piece 106 is not completely removed, the plucking action is performed or the plucking angle is not good, and the staggered stitch 1 〇 2 is broken at the region of the force-bearing needle when the bending is performed, and the stagnation is usually located in the above-mentioned stress-causing phenomenon. At the turning point (for example, along the A_A shown in Figure ,, the line breaks). SUMMARY OF THE INVENTION Life and reliability According to the design of the present invention, it is therefore the object of the present invention to provide a flexible printed circuit board terminal structure f to avoid the scanning of the Qiaozhou·Sina spray plate. The terminal structure contains the first pin 6 200849728 pin, and the first pin and the second pin have different shapes. Each needle: = direction Na parallel 'the first and second stitches are on the substantial side of the long axis direction and the ancient t is the upper parent's arrangement and extends along the long axis direction __ the first and the second needle chat side 1' There is roughly the same direction. Each of the pins has a step portion (steppGrtiGn) formed by a discontinuous change to the == portion of the profile on the side extending in the long axis direction, and at least - _ dirty at each end of the step. Furthermore, the projection length of the stepped portion of the side of the connector adjacent to the connector 7 in the long axis direction is preferably greater than 025 mm, and the radius of the rounded corner formed at both ends of the step portion is preferably greater than 018 mm. . According to the design of the present invention, when the stepped portion is designed at both ends of the step portion, the thickness variation of the stitch can be alleviated to the effect of the sliding dispersion stress, so that if an improper plucking action occurs, for example, the connected H shrapnel is not completely removed. That is, the plucking action or the plucking angle is not good, and the stitch with the arc leading angle can effectively disperse the stress, break at the contour change or cause other damage, and the present invention can optimize the area in the concentrated area by force. The step spacing and the slanting of the rounded corners simultaneously prevent the problem of the damage of the flexible printed circuit board terminal structure caused by the improper pulling action, and greatly improve the drawing life and reliability of the flexible printed circuit board. [Embodiment] FIG. 3 is a schematic view showing an embodiment of the soft printed circuit of the present invention, which is a sub-structure 12, FPC). The flexible printed circuit board can be driven by a tape type #t(tape carrier packaging; TCP)^;#^t aa^^t(chip on film; COF),|, and a terminal structure 12 is placed The connection position of the connector 1〇4 is as shown in Fig. 2 so that the flexible printed circuit board provides an electrical connection between other electronic components. As shown in FIG. 3, the flexible printed circuit board terminal structure 12 is composed of a plurality of first pins 12a and 12b having different shapes, and the long axis direction of each stitch (the direction is set to the χ direction) Parallel to each other, and the first stitch 12a and the second stitch 12b are alternately arranged in a direction (γ direction) perpendicular to the long axis direction, and further, the first stitch and the second stitch 12b extend in the long axis direction. Adjacent sides 14a and 14b have substantially the same course. According to the design of the embodiment, each of the stitches has a stepped portion (stepp〇rti〇n) s formed by the outer contour not being continuous and continuously changed in the (4) extending along the recording direction. For example, the first stitch 仏
沿長軸方向之側邊形成有一凸角M及一凹角N，故凸角“及一凹角N 間的針腳部份形成為一階梯部s，同樣地，第二針腳⑶沿長抽方向之侧 邊《有-凹角P及一凸角Q，故凹角p及凸角Q間的針腳部份亦形成 為-階梯部s，而使第-針腳12a及第二針腳12b彼此具有互補的外型， ，即第-針腳12a形成凸部的位置對應第二針腳12b之凹部位_，而 第一針腳12a形成凹部的位置對應第二針腳12b之凸部位置處。 依本實施例之設計，第-針腳12a及第二針腳⑶的階梯部8兩端角均 進行如圖4所枕導圓肖設計，齡之，各個着沿條方向之側邊的凸 角或凹角均形成為弧角，如圖4所示，導圓角的方式例如可利用一半徑& 的圓周外切Μ點及N點來構成圓弧角，導圓半徑&之尺寸舉例而言可為階 梯呢於針腳長軸方向上之長度的一半，當階梯部s兩端角均進行導圓角 設計，使原本的凸角Μ及凹角Ν均成為弧角μ，、Ν，後，可緩和針腳外形 輪廓的角度變化達到圓滑分散應力的效果；如此若有不當揷拔動作產生 時’例如未將連接器彈片1〇6(如圖2所示)完全移開即進行揷拔動作或掃拔 角度不佳’具圓弧導角可有效分散應力避免針腳於輪廓變化處斷裂或造 成其他損傷。 ^當然，導圓半徑汉之尺寸並不限定，僅須能達到平滑化角度變化以分 %、力的效果即可，睛同時參考圖2及圖5，依本發明之設計不須於整個 2十腳的所有階梯部S兩端角均進行導圓角處理，亦可僅對針腳上於彎折時 鄰^連接器-側的受力集中區域中的階梯部8兩端角進行導圓角處理，例 如可僅針對較鄰近針腳終端一側之階梯部8進行導圓角處理，因為受力集 200849728 品$中的^梯那’為應力集巾财最鶴且最容料輯贱其他損 傷之處。 、 另方面，本發明亦進行受力集中區域中的階梯部s間距之最佳化 設計’於此，階梯部S間較義為階梯部s於長軸方向(x方向)上的水平 =即第-針腳12a其凸角M至凹角N之水平距離、或第二針腳12b 八凹角P及凸角Q之水平距離；如圖6及圖7所示，當階梯部s間距大 於〇.25mm時’以反折角度為3〇度的情況下進行揷拔測試，直至第*次 =有裂痕出現，而當階梯部S間距大於〇.3mm時分散應力的效果更顯著， 至8次以上的插拔她才會出現雜，再者，導辭徑r之尺寸可隨 階梯部s間距增加而增A，故由職結果可看出當階梯部s間距大於 ㈣醜且導圓半㈣之尺寸大於㈣麵日夺，有較佳的分散應力效果。、 因此，本發明可藉由最佳化受力集中區域中的階梯部S間距、同時 己導圓角的設計，可進-步避免因不當揷拔動作造成的軟性印刷電路 板知子結構損_題’大幅提升軟性印路板的揷拔壽命及可靠卢。 當然’依本發明之設計，第-針腳12a與第二針腳必的於長^向 上之長度並不限定，例如可如崎示第二針腳⑶與第—針腳仏具有實 質相同的長度，或者如圖8所示第二針腳12b長度小於第—針職亦可。、 上所祕為舉雕，而非為限雛者。任何未獅本發明之精神 與濟，崎频行之等絲改或敎，觸包含於軸之巾請專利範 圍中，而非限定於上述之實施例。 【圖式簡單說明】 圖1為示«，顯示目前軟性_電路板制的交錯式針腳走線方 圖2為顯示軟性印刷電職姉—連接㈣行揷拔動作之示意圖。 200849728 圖3為-示_ ’顯示本發㈣猶路減子 圖4為示意圖，顯示本發卿圓角設計之—例。 U ' 圖5為說明本發明端子結構,？折時受力針區域之示意圖。 圖6及圖7顯祕本發_子結構設狀揷制試結果。 圖8為-轉圖，顯林發曝板端子結構之另—實施 【主要元件符號說明】 12 軟性印刷電路板端子結構 12a 第一針腳 12b 第二針腳 Ma、14b針腳侧邊 100 軟性印刷電路板 102 交錯式針腳 104 連接器 106 彈片 G、Η、I、J轉折點 Μ、Q 凸角 Ν、Ρ 凹角 S 階梯部 10A convex angle M and a concave corner N are formed along the side of the long axis direction, so that the stitch portion between the convex angle "and a concave corner N is formed as a step portion s, and similarly, the second stitch (3) is along the side of the long drawing direction. The side has a concave angle P and a convex angle Q, so that the stitch portion between the concave corner p and the convex angle Q is also formed as a step portion s, and the first stitch 12a and the second stitch 12b have complementary shapes to each other. That is, the position at which the first stitch 12a forms the convex portion corresponds to the concave portion _ of the second stitch 12b, and the position at which the first stitch 12a forms the concave portion corresponds to the position of the convex portion of the second stitch 12b. According to the design of the embodiment, the first The corners of the step portion 8 of the stitch 12a and the second stitch (3) are designed as shown in Fig. 4, and the lobes or concave corners of the sides along the strip direction are formed as arc angles, as shown in the figure. As shown in FIG. 4, the method of guiding the rounded corners can be formed by, for example, a circumferential outer cutting point of a radius & and an N point to form an arc angle. The size of the leading circle radius can be, for example, a step in the long axis direction of the stitch. Half of the length of the upper part, when the corners of both ends of the step s are designed with rounded corners, the original lobes and concave corners are For the arc angles μ, Ν, and then, the angle change of the contour of the stitch can be alleviated to achieve the effect of smooth and scattered stress; thus, if there is an improper pull-out action, for example, the connector shrapnel 1〇6 is not shown (as shown in FIG. 2). ) If the movement is completely removed, the extraction operation or the sweeping angle is not good. The circular arc guide angle can effectively disperse the stress to avoid breakage of the stitch at the contour change or cause other damage. ^ Of course, the size of the guide circle radius is not limited. It is only necessary to achieve the effect of smoothing the angle change to divide the % and the force. Referring to FIG. 2 and FIG. 5 simultaneously, the design according to the present invention does not need to be guided at both ends of all the step S of the entire 20-foot. The rounded corner processing may also be used to round the corners of the step portion 8 in the force-concentrated region of the connector on the side of the pin when the pin is bent, for example, only for the side closer to the pin terminal. The step portion 8 performs the rounding treatment because the force set 200849728 is the most concentrated and most suitable for other damages. In addition, the present invention also performs stress. Optimization of the step s spacing in the concentrated area Here, the difference between the step portions S is the level of the step portion s in the long axis direction (x direction) = the horizontal distance of the first stitch 12a from the convex angle M to the concave angle N, or the second stitch 12b eight concave angle P and the horizontal distance of the lobes Q; as shown in Fig. 6 and Fig. 7, when the step s spacing is greater than 〇.25 mm, the plucking test is performed with the reflex angle of 3 〇 degrees until the *th = Cracks appear, and the effect of dispersing stress is more pronounced when the step S spacing is greater than 〇.3mm, and it will be mixed until 8 times or more. The size of the guiding path r can be separated by the step s spacing. Increase and increase A, so the result shows that when the step s spacing is greater than (4) ugly and the semicircle (4) is larger than the (four) surface, there is a better dispersion stress effect. Therefore, the present invention can be used most The design of the step S spacing and the rounded corners in the concentrated area of the force can further avoid the damage of the soft printed circuit board caused by the improper pulling action. The problem is to greatly improve the soft printed circuit board. Pull out life and reliability. Of course, according to the design of the present invention, the length of the first stitch 12a and the second stitch must be long, for example, the second stitch (3) and the first stitch can have substantially the same length, or The length of the second stitch 12b shown in Fig. 8 is smaller than that of the first stitch. The secret of the secret is the carving, not the limited catcher. Any of the spirits of the invention, such as the spirit of the invention, and the singularity of the singularity, are included in the patent scope of the shaft, and are not limited to the above embodiments. [Simple description of the diagram] Figure 1 shows the «, showing the current flexible _ circuit board interlaced pin routing. Figure 2 is a schematic diagram showing the soft printing electric job - connection (four) line drawing action. 200849728 Figure 3 is a diagram showing the present invention (4) Judging Subtraction Figure 4 is a schematic diagram showing an example of the design of the rounded corner of the present invention. U ' Figure 5 is a diagram showing the terminal structure of the present invention? Schematic diagram of the area of the needle when folded. Figure 6 and Figure 7 show the results of the test. Figure 8 is a diagram showing the structure of the terminal structure of the display panel. [Main component symbol description] 12 Flexible printed circuit board terminal structure 12a First stitch 12b Second stitch Ma, 14b Pin side 100 Flexible printed circuit board 102 Interlaced pin 104 Connector 106 Spring G, Η, I, J turning point Μ, Q lobe Ν, Ρ concave angle S Step 10