1279814 再者，為了更為提昇遮斷干擾的屏蔽特性，雖然也可 以考慮設置2層以上的縱包屏蔽層，例如3層縱包屏蔽層， 然而在這樣的情形下，會有導致極細的同軸電纜之外徑增 加、重量亦增大，同時可撓性也減損的問題。 5 專利文獻1 特開平6-349345 t發明内容】 發明概要 因此，本發明即是有鑑於上述問題點而完成者，其目 10 的在於提供一種同軸電纜，其係如折疊式行動電話中所用 的天線之導線，或者筆記型電腦的顯示器與本體間之界面 電纜之類的，外徑細，可在微小空間中使用，且即使對應 折疊式行動電話或筆記型電腦之使用時或非使用時，頻繁 地做開閉動動時，依然具有足夠的可撓性，而且遮斷干擾 15 的屏蔽特性優良之極細的同軸電纟覽。 上述目的可藉本發明之極細同軸電纜而達成。亦即， 概要地說，本發明係一種在中心導體周圍被覆有絕緣體， 且該絕緣體的周圍設有縱包屏蔽層，該縱包屏蔽層周圍又 設有外部被覆而形成之同軸電纜中，特徵為，前述縱包屏 20 蔽層係將屏蔽材素線捲繞於前述絕緣體周圍形成第1縱包 屏蔽層，進一步在該第1縱包屏蔽層周圍，以和形成該第1 縱包屏蔽層之屏蔽材素線相同的方向捲繞屏蔽材素線而形 成第2縱包屏蔽層所構成之雙層縱包屏蔽層，並且將該等第 1縱包屏蔽層及第2縱包屏蔽層壓縮後設置外部被覆而成之 1279814 極細同軸電纜。 依據本發明之極細同軸電纜，在中心導體周圍被覆有 絕緣體，且該絕緣體的周圍設有縱包屏蔽層，該縱包屏蔽 層周圍又設有外部被覆而形成之同軸電纜中，因為前述縱 5 包屏蔽層係將屏蔽材素線捲繞於前述絕緣體周圍形成第1 縱包屏蔽層，進一步在該第1縱包屏蔽層周圍，以和形成該 第1縱包屏蔽層之屏蔽材素線相同的方向捲繞屏蔽材素線 而形成第2縱包屏蔽層所構成之雙層縱包屏蔽層，且將該等 第1縱包屏蔽層及第2縱包屏蔽層壓縮後再設置外部被覆， 10 故可在所需的範圍内，除了滿足因應使用時或非使用時而 頻繁地承受開閉動作之折疊式行動電話的連接電纜或筆記 型電腦之界面電纜等所要求的彎曲性、可撓性以外，亦充 分地滿足屏蔽效果。 I：實施方式3 15 較佳實施例之詳細說明 以下將根據較佳實施態樣，並參照所附圖式來說明本 發明之極細同軸電纜。 第1圖為本發明之極細同軸電纜的較佳實施態樣之概 略斜視圖；第2圖為示於第1圖之極細同軸電纜的斷面圖； 20 第3圖係使用示於第1圖之極細同軸電纜的折疊式行動電話 之概略說明圖；第4圖為同軸電纜之耐彎曲性試驗中所使的 彎曲試驗機之說明圖；第5圖為本發明之極細同軸電纜，及 習知之具有編織屏蔽層以及縱包屏蔽層做為外部導體層的 同軸電纜之屏蔽效果的圖表；第6圖為習知之具有編織屏蔽 1279814 層做為外部導體層的同軸電纟覽之斷面圖。再者，圖式係供 說明本發明之較佳實施態樣所用者，各部分之尺度並未考 慮在内應是可以理解的。 參照第1圖及第2圖，所示為本發明之極細同軸電纜 5 10，該極細同軸電纜10具備例如，在外徑約50μπι之由7條 鍍銀含錫銅合金線捻成的中心導體1周圍，被覆以厚度約 45μπι之四氟乙稀全氟烧基乙烯醚（tetrafluoroethylene perfluoroalkylvinylether)共聚物(PFA)的絕緣體2，在該絕緣 體2周圍則有多數根(在本實施態樣中為28根）外徑約50μηι 10 之鍍錫含錫銅合金線呈螺旋狀捲繞而形成之第1縱包屏蔽 層3做為外部導體用之屏蔽材素線。 進一步在該第1縱包屏蔽層3的周圍具備有同樣是做為 外部導體用之屏蔽材素線的，由外徑約50μηι之鍵錫含錫銅 合金線呈螺旋狀捲繞而形成之第2縱包屏蔽層4。藉該等第1 15 縱包屏蔽層3及第2縱包屏蔽層4形成雙層縱包屏蔽層5。將 這像樣地被形成在被覆於中心導體1之絕緣體2的周圍之第 1縱包屏敝層3及第2屏蔽層4，以未圖示出之模具加以壓 縮。其結果，雙層縱包屏蔽層5中之屏蔽材素線間即變得緊 密。 20 然後’在第1縱包屏蔽層3及第2縱包屏蔽層4，亦即經 過壓縮之雙層縱包屏蔽層的周圍，被覆pFA做為外部被覆而 形成同軸電纜10之外皮6。將如此構成之上述極細同軸電纜 10配設在例如，示於第3圖之折疊式行動電話3〇。 不於第3圖之行動電話3〇配備了，具有天線3丨及顯示部 1279814 32等之受話部33，和透過聲音信號或操作鍵來發送郵件等 之^號的送話部34，該受話部33與送話部則是藉轉軸部35 而可轉動地機械結合。此外，在送話部34中具備對應聲音 — ^咸或操作鍵之操作而使信號產生之被載置於印刷基板上 、 5的信號產生電路36。 由於配設了本發明之極細同軸電纜10做為連接電纜以 - 連接該行動電話30中之受話部33的天線31，和使信號產生 之送話部34的信號產生電路36，因此通過轉軸部35内地配 置之同軸電纜1〇，其一端側固設在受話部33的天線31，另 · 10 一端則固設在信號產生電路36。如此，折疊式行動電話3〇 就被建構成在通入電源後的作動時，會透過受話部33的天 線31而將來自信號產生電路36的信號發送出去，或者可以 接受來自外部的信號。 用第4(a)圖及第4(b)圖所示之左右彎曲試驗機40，對以 15 此種方式做成之折疊式行動電話30 ’就其做為連接電乡覽， 亦即天線的導線，而配設之本發明的極細同軸電纜10，進 行财彎曲性的調查。 ® 亦即，將本發明之極細同轴電纜10的一端側固定在左 右彎曲試驗機40的上端側41，其另一端側則通過具有互相 20 離間的一對心軸42之彎曲部43的心軸42之間，同時在其最 下端懸吊荷重w(127gf);若以此狀態使彎曲部43以左右9〇 度的彎曲角度彎曲，本發明之極細同軸電纜10就形成由心 軸42來承受向左右的彎曲。如此操作以進行本發明之極細 同軸電纟覽10的幫曲试驗(彎、曲半徑7.5mm)。藉該耐彎曲性試 10 ^79814 驗求得内部導體或外部導體變成不導通的次數。 比較例1係使用外徑約50μιη的鍵錫含錫銅合金線，做 成持數(條)6、打數(錠)8之編織屏蔽構造，製作其他構成和 本發明之同軸電纜10的構成相同樣的同軸電纜。 5 其次，比較例2係使用外徑約50μιη之多數根(28根)鍍錫 含錫銅合金線，呈螺旋狀地捲繞而形成之縱包屏蔽構造做 為連接電纜，即同軸電纜之外部導體，製作成其他構成與 本發明之同軸電纜1〇的構成同樣的同軸電纜。 以上述方法對本發明之同軸電纜及比較例丨和比較例2 10之同軸電纜的耐彎曲性進行調查的結果示於表1。 【表1】 左右彎曲壽命試驗結果 Η--—****— 左右彎曲壽命次數 具有本發明之外部導體的同轴電纜 129,000 次 89,000 次 (夕溫昆中1 -—-_____一 138,000 次 —------„ 由表1可知，具有本發明之外部導體的同軸電纜，其彎 曲壽命約為具有以習知之編織構造為外部導體的同軸電、纜 15 之1.5倍。 第圖所示為本發明之同軸電雙及比較例1和比較 例2之同軸電說的屏蔽效果之調查結果。分別表示為，a係 比較例1之具有編織屏蔽構造做為外部導體的同轴電徵；β 為，、有本^明之外部導體的同軸電瘦；以及C為比較例2之 1279814 具有縱包屏蔽構造做為外部導體的同軸電繞之屏蔽效果。 再者，屏蔽效果之測定係以根據CISPRPub 16的規定 之吸收射位（clamp)法來進行。 — 從表1及第5圖可知，比較州之同轴電繞的屏蔽效果A - 5雖然優良，但是彎曲性、可撓性不足；而，比較例2之同軸 電缓雖然彎曲性、可撓性稍佳但是屏蔽效果c不足。相躲 . 此，本發明之同軸電纜並不偏向比較例丄及比較例2中之彎 曲性、可撓性或屏蔽效果之任—者的較優方向，而是在所 需要的範圍内充分地滿足折疊式行動電話或筆記型電腦$ # 10要求的彎曲性、可撓性及屏蔽效果。 發明的效果 如以上所做之說明，若依據本發明之極細同軸電纜， 在在中心導體周圍被覆有絕緣體，且該絕緣體的周圍設有 縱包屏蔽層，該縱包屏蔽層周圍又設有外部被覆而形成之 15同軸電纜中，因其特徵為前述縱包屏蔽層係將屏蔽材素線 捲繞於前述絕緣體周圍形成第1縱包屏蔽層，進一步在該第 1縱包屏蔽層周圍，以和形成該第丨縱包屏蔽層之屏蔽材素 · 線相同的方向捲繞屏蔽材素線而形成第2縱包屏蔽層所構 成之雙層縱包屏蔽層，且將該等第1縱包屏蔽層及第2縱包 20屏蔽層壓縮後再設置外部被覆，故可在所需的範圍内，達 到充分滿足因應使用時或非使用時而頻繁地承受開閉動作 之折疊式行動電話的連接電纜或筆記型電腦之界面電纜等 所要求的彎曲性、可撓性，以及屏蔽效果之功效。 12 1279814 【圖式簡單說明3 第1圖為依據本發明之極細同軸電纜的較佳實施態樣 之概略斜視圖。 第2圖為第1圖所示之極細同軸電纜的斷面圖。 5 第3圖為應用第1圖所示之極細同軸電纜的折疊式行動 電話之概略說明圖。 第4圖為同軸電纜之耐彎曲性試驗中所使用的彎曲試 驗機之說明圖。1279814 Furthermore, in order to improve the shielding characteristics of the interference, it is also conceivable to provide a vertical shielding layer of two or more layers, for example, a three-layer longitudinal shielding layer. However, in such a case, a very fine coaxial is caused. The outer diameter of the cable is increased, the weight is also increased, and the flexibility is also degraded. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei No. 6-349345. SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and a object thereof is to provide a coaxial cable which is used in a mobile phone for folding mobile phones. The wire of the antenna, or the interface cable between the display of the notebook computer and the body, has a small outer diameter, can be used in a small space, and even when used in conjunction with a folding mobile phone or a notebook computer, or when not in use, When it is frequently opened and closed, it still has sufficient flexibility, and it also blocks the extremely fine coaxial power of the interference characteristics of the interference. The above object can be achieved by the extremely thin coaxial cable of the present invention. That is, in summary, the present invention is characterized in that an insulator is covered around the center conductor, and a longitudinal shielding layer is disposed around the insulator, and the vertical shielding layer is surrounded by a coaxial cable formed by external coating. The vertical screen 20 is formed by winding a shielding material wire around the insulator to form a first vertical shielding layer, and further forming a first vertical shielding layer around the first vertical shielding layer. The shielding material wires are wound in the same direction to form a double vertical shielding layer formed by the second vertical shielding layer, and the first vertical shielding layer and the second vertical shielding layer are compressed. After setting the externally covered 1279814 very thin coaxial cable. According to the ultra-fine coaxial cable of the present invention, an insulator is covered around the center conductor, and a longitudinal shielding layer is disposed around the insulator, and the longitudinal shielding layer is further provided with a coaxial cable formed by external coating, because the longitudinal direction is 5 The shielding layer is formed by winding a shielding material wire around the insulator to form a first vertical shielding layer, and further surrounding the first vertical covering shielding layer with the shielding material line forming the first vertical covering shielding layer. Winding the shielding material line to form a double vertical shielding layer formed by the second vertical shielding layer, and compressing the first vertical shielding layer and the second vertical shielding layer, and then providing an external coating. 10 Therefore, it is possible to achieve the required flexibility and flexibility in connection with the connection cable of the foldable mobile phone or the interface cable of the notebook computer, which is frequently required to be subjected to opening and closing operations during use or non-use. In addition, the shielding effect is also fully satisfied. I. Embodiment 3 15 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a very thin coaxial cable of the present invention will be described based on preferred embodiments and with reference to the accompanying drawings. 1 is a schematic perspective view of a preferred embodiment of a very thin coaxial cable of the present invention; FIG. 2 is a cross-sectional view of the ultrafine coaxial cable shown in FIG. 1; 20 is shown in FIG. A schematic diagram of a folding mobile phone of a very thin coaxial cable; Fig. 4 is an explanatory view of a bending tester made in a bending resistance test of a coaxial cable; Fig. 5 is a very thin coaxial cable of the present invention, and a conventional one A diagram of the shielding effect of a coaxial cable having a braided shielding layer and a longitudinally wrapped shielding layer as an outer conductor layer; and FIG. 6 is a cross-sectional view of a conventional coaxial electrical wiring having a braided shield 1279814 layer as an outer conductor layer. Furthermore, the drawings are intended to illustrate the preferred embodiment of the invention, and the dimensions of the various parts are not to be considered as being understood. Referring to Figures 1 and 2, there is shown a very thin coaxial cable 5 10 of the present invention having, for example, a center conductor 1 formed of 7 silver-plated tin-containing copper alloy wires having an outer diameter of about 50 μm. Around the insulator 2, which is coated with a tetrafluoroethylene perfluoroalkylvinylether copolymer (PFA) having a thickness of about 45 μm, has a plurality of roots around the insulator 2 (in this embodiment, 28) The first vertical-clad shield layer 3 formed by spirally winding a tin-plated tin-containing copper alloy wire having an outer diameter of about 50 μm is used as a shield material wire for the outer conductor. Further, the first vertical-clad shield layer 3 is provided with a shield-cored wire which is also used as an outer conductor, and is formed by spirally winding a tin-tin-containing tin-copper alloy wire having an outer diameter of about 50 μm. 2 longitudinally covering the shielding layer 4. The double vertical shielding layer 5 is formed by the first 15th longitudinal shielding layer 3 and the second vertical shielding layer 4. This is formed in a manner similarly to the first vertical-package screen layer 3 and the second shield layer 4 which are coated around the insulator 2 of the center conductor 1, and is compressed by a mold (not shown). As a result, the shielding material lines in the double longitudinal shielding layer 5 become dense. Then, the pFA is covered as an outer cover to form the outer sheath 6 of the coaxial cable 10 around the first longitudinally-shielded shield layer 3 and the second vertical-package shield layer 4, that is, around the compressed double-layer longitudinally-shielded shield layer. The above-described ultrafine coaxial cable 10 thus constructed is disposed, for example, in the foldable mobile phone 3 shown in Fig. 3. The mobile phone unit 3, which is not equipped with the third figure, is provided with a receiver unit 33 such as an antenna 3A and a display unit 1279814 32, and a call unit 34 that transmits a mail or the like via an audio signal or an operation key. The portion 33 and the transmitting portion are rotatably mechanically coupled by the rotating shaft portion 35. Further, the transmitting unit 34 is provided with a signal generating circuit 36 for causing a signal to be generated on the printed circuit board 5 in response to the operation of the sound-salt or the operation key. Since the ultrafine coaxial cable 10 of the present invention is provided as a connecting cable for connecting the antenna 31 of the receiving portion 33 of the mobile phone 30 and the signal generating circuit 36 for the signal generating portion 34, the shaft portion is passed through the shaft portion. A coaxial cable 1 is disposed in the interior of the antenna, and one end side thereof is fixed to the antenna 31 of the receiving unit 33, and one end of the other 10 is fixed to the signal generating circuit 36. Thus, the foldable mobile phone 3 is constructed to transmit a signal from the signal generating circuit 36 through the antenna 31 of the receiving unit 33 when the power is turned on, or to receive a signal from the outside. Using the left and right bending tester 40 shown in Figs. 4(a) and 4(b), the folding mobile phone 30' made in the manner of 15 is used as a connection, that is, an antenna. The wire and the ultra-thin coaxial cable 10 of the present invention are provided for investigation of the financial flexibility. That is, one end side of the ultrafine coaxial cable 10 of the present invention is fixed to the upper end side 41 of the right and left bending tester 40, and the other end side thereof passes through the heart of the curved portion 43 having a pair of mandrels 42 spaced apart from each other. Between the shafts 42 and at the lowermost end thereof, the load w (127 gf) is suspended; if the bending portion 43 is bent at a bending angle of about 9 degrees to the left and right in this state, the ultrafine coaxial cable 10 of the present invention is formed by the mandrel 42 Withstand bending to the left and right. The bending test (bending, curved radius 7.5 mm) of the ultra-fine coaxial electric power 10 of the present invention was carried out in this manner. The bending resistance test 10 ^79814 is used to determine the number of times the inner conductor or the outer conductor becomes non-conductive. In Comparative Example 1, a bond tin-containing tin-copper alloy wire having an outer diameter of about 50 μm was used to form a braided shield structure having a number (strip) of 6 and a number of counts (ingot) 8, and the other configuration and the constitution of the coaxial cable 10 of the present invention were produced. The same coaxial cable. 5 Next, in Comparative Example 2, a plurality of (28) tin-plated tin-containing copper alloy wires having an outer diameter of about 50 μm were used, and a longitudinally-shielded shield structure formed by spirally winding was used as a connecting cable, that is, an external cable. The conductor is formed into another coaxial cable having the same configuration as that of the coaxial cable 1 of the present invention. The results of investigation of the bending resistance of the coaxial cable of the present invention and the coaxial cable of Comparative Example 比较 and Comparative Example 218 by the above method are shown in Table 1. [Table 1] Left and right bending life test results Η---****- Left and right bending life times 129,000 times of coaxial cables having the outer conductor of the present invention 89,000 times (1⁄--_____ 138,000 times in the evening) ------- „ As can be seen from Table 1, the coaxial cable having the outer conductor of the present invention has a bending life of about 1.5 times that of the coaxial electric cable 15 having a conventional braided structure as an outer conductor. The results of the investigation of the shielding effect of the coaxial electric double and the coaxial electric system of Comparative Example 1 and Comparative Example 2 are shown as a coaxial electric sign having a braided shield structure as an outer conductor of Comparative Example 1 respectively. ; β is the coaxial electric thinness of the outer conductor of the present invention; and C is the shielding effect of the coaxial electric winding of the vertical conductor shield structure as the outer conductor of the 1279814 of the comparative example 2. Furthermore, the shielding effect is determined by According to the absorption clamp method specified by CISPRPub 16. - It can be seen from Tables 1 and 5 that the shielding effect of the coaxial coaxial winding of the state is excellent, but the bending property and flexibility are insufficient. ;, Comparative Example 2 Although the electric flexibility is slightly curved and flexible, the shielding effect c is insufficient. Therefore, the coaxial cable of the present invention is not biased toward the bending, flexing or shielding effects of the comparative example and the comparative example 2. - the preferred direction of the person, but fully meet the flexibility, flexibility and shielding effect required by the foldable mobile phone or notebook $ #10 within the required range. The effect of the invention is as explained above According to the ultra-fine coaxial cable of the present invention, an insulator is coated around the center conductor, and a longitudinal shielding layer is disposed around the insulator, and the vertical shielding layer is provided with 15 coaxial cables formed by external coating. The first vertical shielding layer is formed by winding a shielding material wire around the insulator to form a first vertical shielding layer, and further forming a second vertical shielding layer around the first vertical cladding shielding layer. The shielding material and the wire are wound in the same direction to form a double vertical shielding layer composed of the second vertical shielding layer, and the first vertical shielding layer and the second vertical package 20 are shielded. After layer compression By providing an external covering, it is possible to achieve the required bending of the connecting cable or the interface cable of the notebook computer that fully satisfies the folding mobile phone that is frequently subjected to opening and closing operations during use or non-use within the required range. 12 1279814 [Simple description of the drawings 3] Fig. 1 is a schematic perspective view of a preferred embodiment of a very thin coaxial cable according to the present invention. Fig. 2 is a view of Fig. 1. A cross-sectional view of the extremely thin coaxial cable shown in Fig. 5. Fig. 3 is a schematic explanatory view of a folding mobile phone using the very thin coaxial cable shown in Fig. 1. Fig. 4 is a view showing the bending resistance test of the coaxial cable. An illustration of the bending test machine.
第5圖為依據本發明極細同軸電纜，以及具有習知之編 10 織屏蔽層及縱包屏蔽層做為外部導體層之同軸電纜的屏蔽 效果之圖表。 第6圖為具有習知之編織屏蔽層做為外部導體層的同 軸電纜之斷面圖。 【圖式之主要元件代表符號表】 1.. .中心導體 5··.雙層縱包屏蔽層Fig. 5 is a graph showing the shielding effect of a very thin coaxial cable according to the present invention, and a coaxial cable having a conventional woven shield layer and a longitudinal shield layer as an outer conductor layer. Figure 6 is a cross-sectional view of a coaxial cable having a conventional braided shield as an outer conductor layer. [The main components of the diagram represent the symbol table] 1.. Center conductor 5··. Double vertical shielding layer
2.. .絕緣體 6…外皮 3.. .第1縱包屏蔽層 10···極細同軸電纜 4…第2縱包屏蔽層 132.. Insulator 6... Skin 3.. 1st longitudinal shield layer 10···Micro-coaxial cable 4...2nd longitudinal shield layer 13