1291184 (1) 玖、發明說明 【發明所屬之技術領域】 本發明是關於共模扼流線圈，特別是有關用於各種電 子迴路之小型且可安裝於繞線型表面的晶片型共模扼流線 圈。 【先前技術】 共模扼流線圈如第5圖的電路圖所示，具有連接於輸 入端子1 a、輸出端子2a之間的線圈3 ;與連接於輸入端 子1 b、輸出端子 2 b之間的線圈 4 (請參考日本特開 2 002-3 1 3 646號公報）。上述的線圈3、4，是在肥粒鐵心 等磁性材料所構成的核心構件上纏繞雙線（bifilar)之2 迴路4端子的扼流線圈。 第6圖，是纏繞於核心之共模扼流線圈的底面圖。如 第6圖所示，具有設於四腳柱狀之核心的捲芯部1 1 ;及 分別配置於捲芯部1 1兩端之四角形的凸緣1、2，在其前 端部，保持特定距離地形成4個電極1 a、1 b與2 a、2 b。 使用上述核心的共模扼流線圈，是將線圈3、4雙線捲繞 於捲芯部1 1，並利用錫銲或熔接分別與上述端部3 a、3 b 及4a、4b形成電氣連接。 上述的傳統繞線型共模扼流線圈》當連接線圈3、4 的端部3a、3b與4a、4b之際，如圖面中箭號G所示，由 於線圈3的端部3 a靠近緊鄰於電極1 a的電極1 b、且線 圈4的端部4b靠近緊鄰於電極2b的電極2a，恐有接觸 -5- 1291184 (2) 而形成短路之虞。此外，即使不會形成接觸，由於無法確 保一定程度的間隔，也恐將衍生出耐壓性劣化及絕緣不佳 的問題。 爲了防止上述的問題’如第7圖所示對核心2 0施以 繞線，該核心在與設於核心之凸緣1、2內側根部形成連 接的捲芯部兩端設有溝5 a、5 b，或如第8圖所示對核心 2 1施以繞線，該核心在捲芯部的兩側面設有由互成相對 狀之捲繞溝所形成的凹部6a、6b。如此一來，藉由採用 上述的核心20、2 1，可避免連接線圈末端的電極、與緊 鄰的電極之間過於靠近。 但是在採用第7圖之核心20的方法中，必須將溝5a 、5b設置一定深度，而在強度上產生問題。而在採用第8 圖之核心2 1的方法中，一旦增加繞線的數量將增加捲繞 寬度的限制。此外，當增加繞線寬度也就是凹部6a、6b 的寬度時，將無法在連接線圈末端的電極與緊鄰的電極之 間保持充分的距離，而必須實施線圈末端分離之類的作業 【發明內容】 (發明所欲解決的課題） 爲了解決上述的問題，本發明的目的是提供一種··不 會使相鄰線圈末端之間靠近或接觸’導致耐壓性劣化或絕 緣不良而產生短路，且可靠性高的晶片型共模扼流線圈。 -6- 1291184 (3) (解決課題之手段） 爲了解決上述課題，本發明的晶片型共模扼流線圈， 是由捲芯部；和由複數個針腳狀電極部互相保持特定間隔 所形成的凸緣部；及捲繞於捲芯部，並使捲繞起始端與捲 繞終端連接於特定電極部的線圈部所構成的晶片型共模扼 流線圈，其特徵爲：在捲芯部的兩側面設置凹部，且該凹 部面對捲線軸在長軸方向上形成錯位偏移。 此外，本案的特徵在於：在凹部內設有可導出捲繞起 始端與捲繞終端的溝。 而捲繞起始端與捲繞終端的導出部，是從遠離連接電 極部與凸緣部之其中一端凹部的肩部導出，並連接於特定 的電極部。 (發明的效果） 由上述的說明可淸楚得知，本發明的晶片型共模扼流 線圏，是藉由在捲芯部的兩側面設置一對凹部’並將該凹 部的位置配設成非對稱的偏移狀態，而提供一種捲線的端 部配設成不會與相鄰的電極接觸或靠近，因此不會與相鄰 的電極產生短路而招致耐壓性劣化或絕緣不良’且可靠性 高的晶片型共模扼流線圈。 【實施方式】 (實施例） 以下根據第1〜4圖說明本發明的其中一個實施例。此 1291184 (4) 外，圖面中與第5〜8圖標示相同符號的部分’是表不相同 或相當的部份。 第1 A圖是由底面視角所見之本發明晶片型共模扼流 線圈的立體圖’第1 B圖是由底面視角所見形成電極之核 心構件的立體圖。第2圖則是第1圖之實施例的平面圖。 如第1 B圖所示，本實施例所採用的核心1 〇是由肥粒 鐵所構成，並在捲芯部1 1的兩端部設置一對凸緣1、2。 該凸緣1、2具備：藉由在圖面上方設置溝7所形成的腳 部；及分別在前述腳部的前端形成電極膜的4個電極1 a 、lb、2a、2 b 〇 上述的核心1 〇，在以捲芯部11之長軸方向作爲軸心 的兩側面上，形成作爲捲繞溝的一對凹部6a、6b。該凹 部6a、6b具有相同的寬度，並且在長軸方向上形成偏移 的非對稱配置。舉例來說，當凹部6a配置在靠近電極2a 側的偏移位置時，凹部6B則配置在靠近電極1 a側的偏移 位置。換言之，凹部6a與6b是形成非對稱性的偏移。 如第1 A圖所示，在上述核心1 0之捲芯部1 1的凹部 6a、6b處，雙線纏繞著兩條線圈3、4。該線圈3、4的捲 繞起始端部3a、4a與捲繞終端3b、4b的末端，是利用熱 壓著之類的方法，和遠離凸緣1與凸緣2的凹部6 a ;及 從凹部6b之肩部6a'、6b'延伸出的各電極la、lb、2a、 2b形成電氣連接。 換言之，線圈3之捲繞起始端3 a是連接於電極1 a， 線圈3之捲繞終端3 b是連接於電極2 a。而線圈4之捲繞 -8- 1291184 (5) 起始端4a是連接於電極1 b，線圈4之捲繞終端4b是連 接於電極2b。藉由上述方式，形成2迴路4端子型之晶 片型共模扼流線圈。 第2圖是顯示第1圖之核心1 0與線圈末端間之關係 的說明圖。如第2圖所示，核心1 〇的凹部6a、6b，是配 設在凸緣1、2間之長軸方向兩側面的捲芯部1 1，其位置 是位於從核心之長軸方向中心處朝反向偏移的位置。 凹部6a、6b的偏移位置對凸緣1、2形成ml > m2的 關係，其中m 1是指作爲捲繞起始端與捲繞終端之導出部 的其中一側的距離，而m2則是另一側的距離。凹部6a、 6b的寬度L，由於形成相同的捲繞寬度，因此不會減少捲 繞的數量。距離m 1是根據線圈末端與緊鄰電極間的接近 狀態來決定，m2則是減去捲繞寬度L後與凸緣之間的距 離。因此，第 8圖所示的傳統核心的m 1 =m2，而位於捲 芯部的中心位置。 如上所述地，將容易與相鄰電極接近之線圈3的末端 3 a從遠離電極1 a的位置導出，並將線圈4的末端4b從 遠離電極2a的位置導出，可使距離1變大並錯開凹部的 位置。 根據上述的方式，並不會改變線圈的寬度，也就是指 不會小於習知的捲繞寬度，可增加線圈末端與電極最靠近 之部分G的距離。因此，不會使線圈末端與電極之間形 成短路或絕緣組抗下降程度的接近關係，而獲得信賴性高 的晶片型共模扼流線圈。 -9 - 1291184 (6) 此外，由於線圈的末端與電極之間形成分離，即使採 用按壓高溫之加熱器晶片的方法使線圈末端與電極接合時 ，也能有效地抑制並防止線圈除去覆膜後的外露導體，也 就是指線圈末牺’與欲接合之電極緊鄰的電極接觸導致短 路、或過於靠近而導致絕緣抗組下降的情形發生。 此外，雖然第1圖的晶片型共模扼流線圈爲不具頂板 的結構，但如第3圖所示，第1圖的線圈亦可形成具備頂 板9的結構。頂板9可以是樹脂製的平板，或亦可由肥粒 鐵構成之用來封閉磁路的平板。 第4圖，是本發明晶片型共模扼流線圏所使用之核心 的變形例圖。 如第4圖所示，該核心的特徵在於：在第1圖所示之 捲芯部1 1兩側面的凹部6a、6b處，於導出捲繞起始端與 捲繞終端的部分設置溝8。藉由形成上述的結構，可較第 1圖所示的晶片型共模扼流線圈，更進一步增加線圈末端 與電極最靠近之部分G的距離，能有效地抑制並防止線 圈末端，與欲接合之電極緊鄰的電極接觸導致短路、或過 於靠近而導致絕緣抗組下降的情形發生。 在上述的實施例中，雖然是以2迴路4端子的晶片型 共模扼流線圈進行說明，但本案對迴路數量、端子數量並 無特殊的限制，即使是3迴路6端子以上的晶片型共模扼 流線圈也是用於本發明。 雖然在上述的實施例中，是採用肥粒鐵製的核心進行 說明，但核心的構成材料卻不受限於此，可採用以鋁爲首 -10- 1291184 (7) 的各種絕緣材料或磁性材料。 本發明並不拘限於上述的實施例，其他的部分如捲芯 部、凸緣部及電極的具體形狀，線圈的捲繞形式等，只要 在不逸脫本發明主旨的範圍內，可有各種應用或設計變更 【圖式簡單說明】 第1圖：爲本發明之晶片型共模扼流線圈，圖1 A爲 線圈整體的立體圖，圖1 B爲顯示核心結構的立體圖。 第2圖：是第丨圖之晶片型共模扼流線圈的說明圖。 第3圖：是在第1圖之晶片型共模扼流線圈上設有頂 板的立體圖。 第4圖：是本發明晶片型共模扼流線圏之變形例的說 明圖。 第5圖：具有2迴路4端子之共模扼流線圈的電路圖 〇 胃6圖：傳統繞線型的共模扼流線圈的立體圖。 胃7圖：傳統繞線型共模扼流線圈所採用之核心結構 的立體圖。 第8圖··傳統繞線型共模扼流線圈所採用之核心結構 的立體圖。 王要兀件對照表 •凸緣 -11 - 1291184 (8) la 、lb :電極 ( 輸入端子） 2 :凸緣 2 a 、2b :電極 ( 輸出端子） 3 :線圈 3 a 、3b :端部 4 :線圈 4 a > 4b :端部 5a 、5b ••溝 6a 、6b :凹部 6 a 、、6b' =肩部 7 :溝 8 :溝 9 =頂板 10 :核心 11 :捲芯部 20 :核心 2 1 :核心1291184 (1) Field of the Invention The present invention relates to a common mode choke coil, and more particularly to a chip type common mode choke coil which is small and can be mounted on a wound surface for various electronic circuits. . [Prior Art] The common mode choke coil has a coil 3 connected between the input terminal 1a and the output terminal 2a as shown in the circuit diagram of Fig. 5; and is connected between the input terminal 1b and the output terminal 2b. Coil 4 (refer to Japanese Patent Laid-Open No. 002-3 1 3 646). The coils 3 and 4 described above are choke coils in which a two-circuit 4-terminal of a bifilar is wound around a core member made of a magnetic material such as a ferrite core. Figure 6 is a bottom view of a common mode choke coil wound around the core. As shown in Fig. 6, the core portion 1 1 having the core of the four-legged column; and the flanges 1 and 2 which are respectively disposed at the both ends of the core portion 1 1 are kept at the front end portion thereof. Four electrodes 1 a, 1 b and 2 a, 2 b are formed at a distance from the ground. By using the above-mentioned core common mode choke coil, the coils 3 and 4 are wound in a double wire on the core portion 1 1 and electrically connected to the end portions 3 a, 3 b and 4a, 4b by soldering or welding, respectively. . The above-mentioned conventional winding type common mode choke coil" when connecting the ends 3a, 3b and 4a, 4b of the coils 3, 4, as indicated by an arrow G in the figure, is close to the end 3a of the coil 3 The electrode 1b of the electrode 1a and the end 4b of the coil 4 are close to the electrode 2a adjacent to the electrode 2b, and there is a fear that the contact -5 - 1291184 (2) forms a short circuit. Further, even if contact is not formed, there is a fear that deterioration of pressure resistance and poor insulation are caused because a certain degree of separation cannot be ensured. In order to prevent the above problem, the core 20 is wound as shown in Fig. 7, and the core is provided with a groove 5a at both ends of the core portion which is connected to the inner root portion of the flanges 1, 2 provided at the core. 5b, or winding the core 2 1 as shown in Fig. 8, the core is provided with recesses 6a, 6b formed by mutually opposing winding grooves on both sides of the core portion. In this way, by using the above-described cores 20, 2 1, it is possible to avoid the electrode which is connected to the end of the coil and the electrode which is adjacent to it is too close. However, in the method using the core 20 of Fig. 7, it is necessary to set the grooves 5a, 5b to a certain depth, which causes a problem in strength. In the method of using the core 21 of Fig. 8, once the number of windings is increased, the limitation of the winding width is increased. Further, when the winding width is increased, that is, the width of the concave portions 6a, 6b, it is impossible to maintain a sufficient distance between the electrode connecting the end of the coil and the immediately adjacent electrode, and it is necessary to perform work such as separation of the coil end. (Problems to be Solved by the Invention) In order to solve the above problems, an object of the present invention is to provide a short circuit which is short-circuited and which does not cause close contact or contact between adjacent coil ends, resulting in deterioration of pressure resistance or insulation failure. High-profile chip-type common mode choke coil. -6- 1291184 (3) (Means for Solving the Problem) In order to solve the above problems, the wafer-type common mode choke coil of the present invention is formed by a winding core portion and a predetermined interval between a plurality of pin-shaped electrode portions. a flange type portion; and a wafer type common mode choke coil formed by winding a coil core portion and a coil portion that is connected to the winding electrode terminal and connected to the winding electrode terminal, and is characterized in that: The both sides are provided with a recess, and the recess forms a misalignment offset in the long axis direction facing the bobbin. Further, the present invention is characterized in that a groove for guiding the winding start end and the winding end is provided in the recess. Further, the winding start end and the lead-out portion of the winding end are led out from the shoulder portion away from the one end concave portion of the connecting electrode portion and the flange portion, and are connected to the specific electrode portion. (Effects of the Invention) As apparent from the above description, the wafer type common mode choke wire of the present invention is provided with a pair of recesses ' on both side faces of the core portion and the positions of the recesses are arranged. In an asymmetrical offset state, the end portion of the coiled wire is disposed so as not to be in contact with or close to an adjacent electrode, and thus does not cause a short circuit with an adjacent electrode to cause deterioration of pressure resistance or poor insulation. High reliability chip type common mode choke coil. [Embodiment] (Embodiment) Hereinafter, one embodiment of the present invention will be described based on Figs. In addition, in the 1291184 (4), the portion "the same symbol as the fifth to eighth icons in the drawing" is a part that is different or equivalent. Fig. 1A is a perspective view of the wafer type common mode choke coil of the present invention as seen from the bottom surface angle. Fig. 1B is a perspective view of the core member forming the electrode as seen from the bottom surface. Fig. 2 is a plan view of the embodiment of Fig. 1. As shown in Fig. 1B, the core 1 采用 used in the present embodiment is composed of ferrite iron, and a pair of flanges 1, 2 are provided at both end portions of the core portion 1 1 . The flanges 1 and 2 include: a leg portion formed by providing a groove 7 on the upper side of the drawing; and four electrodes 1 a , 1b, 2a, and 2 b respectively forming an electrode film at the tip end of the leg portion. In the core 1 一对, a pair of concave portions 6a and 6b as winding grooves are formed on both side surfaces of the winding core portion 11 in the longitudinal direction of the core portion 11. The recesses 6a, 6b have the same width and form an offset asymmetric configuration in the long axis direction. For example, when the concave portion 6a is disposed at an offset position close to the electrode 2a side, the concave portion 6B is disposed at an offset position close to the electrode 1a side. In other words, the recesses 6a and 6b are offsets that form an asymmetry. As shown in Fig. 1A, at the recesses 6a, 6b of the core portion 1 1 of the core 10 described above, the two coils 3, 4 are wound in a double line. The winding start end portions 3a, 4a of the coils 3, 4 and the ends of the winding terminals 3b, 4b are by a method such as heat pressing, and a recess 6a away from the flange 1 and the flange 2; The electrodes la, lb, 2a, 2b from which the shoulders 6a', 6b' of the recess 6b extend are electrically connected. In other words, the winding start end 3a of the coil 3 is connected to the electrode 1a, and the winding end 3b of the coil 3 is connected to the electrode 2a. The winding of the coil 4 is -8- 1291184. (5) The starting end 4a is connected to the electrode 1b, and the winding end 4b of the coil 4 is connected to the electrode 2b. According to the above manner, a two-circuit, four-terminal type wafer type common mode choke coil is formed. Fig. 2 is an explanatory view showing the relationship between the core 10 of the first drawing and the end of the coil. As shown in Fig. 2, the recessed portions 6a and 6b of the core 1 are the core portions 1 1 disposed on both side faces in the longitudinal direction between the flanges 1, 2, and are located at the center from the long axis direction of the core. The position that is offset towards the reverse direction. The offset position of the recesses 6a, 6b forms a relationship of ml > m2 to the flanges 1, 2, where m 1 means the distance from one side of the winding start end to the lead-out portion of the winding end, and m2 is The distance on the other side. Since the width L of the recesses 6a, 6b is formed to have the same winding width, the number of windings is not reduced. The distance m 1 is determined according to the approach state between the coil end and the immediately adjacent electrode, and m2 is the distance from the flange after subtracting the winding width L. Therefore, the conventional core shown in Fig. 8 has m 1 = m2 and is located at the center of the core of the winding. As described above, the end 3a of the coil 3 which is easily close to the adjacent electrode is led out from the position away from the electrode 1a, and the end 4b of the coil 4 is led out from the position away from the electrode 2a, so that the distance 1 becomes larger and Stagger the position of the recess. According to the above manner, the width of the coil is not changed, that is, it is not smaller than the conventional winding width, and the distance between the end of the coil and the portion G closest to the electrode can be increased. Therefore, a wafer type common mode choke coil having high reliability is obtained without causing a short circuit between the coil end and the electrode or a close relationship of the insulation group resistance. -9 - 1291184 (6) In addition, since the end of the coil is separated from the electrode, even when the coil end is bonded to the electrode by pressing the heater chip at a high temperature, the coil can be effectively suppressed and prevented from being removed after the film is removed. The exposed conductor, that is, the end of the coil, is in contact with the electrode immediately adjacent to the electrode to be joined, resulting in a short circuit, or too close to cause a drop in the insulation resistance group. Further, although the wafer type common mode choke coil of Fig. 1 has a structure without a top plate, as shown in Fig. 3, the coil of Fig. 1 may be formed to have a top plate 9. The top plate 9 may be a flat plate made of resin or a flat plate made of ferrite iron for closing the magnetic circuit. Fig. 4 is a view showing a modification of the core used in the wafer type common mode choke coil of the present invention. As shown in Fig. 4, the core is characterized in that a groove 8 is provided in a portion where the winding start end and the winding end are taken out at the concave portions 6a and 6b on both side faces of the winding core portion 1 shown in Fig. 1. By forming the above-described structure, the wafer-type common mode choke coil shown in FIG. 1 can further increase the distance between the coil end and the portion G closest to the electrode, thereby effectively suppressing and preventing the coil end from being engaged. Contact with the electrode immediately adjacent to the electrode causes a short circuit, or is too close, causing a drop in the insulation resistance group. In the above-described embodiment, the two-circuit, four-terminal, wafer-type common mode choke coil has been described. However, the number of circuits and the number of terminals are not particularly limited in this case, and even a three-circuit, six-terminal or more wafer type is common. A mode choke coil is also used in the present invention. Although in the above embodiments, the core made of the ferrite core is used for explanation, the core constituent material is not limited thereto, and various insulating materials or magnetic materials such as aluminum-based 1-10-291184 (7) may be used. material. The present invention is not limited to the above-described embodiments, and other portions such as a core portion, a flange portion, and a specific shape of an electrode, a wound form of a coil, and the like may have various applications as long as they do not fall within the scope of the gist of the present invention. Or design change [Simple description of the drawing] Fig. 1 is a wafer type common mode choke coil of the present invention, Fig. 1A is a perspective view of the entire coil, and Fig. 1B is a perspective view showing the core structure. Fig. 2 is an explanatory view of a wafer type common mode choke coil of the second drawing. Fig. 3 is a perspective view showing a top plate provided in the wafer type common mode choke coil of Fig. 1. Fig. 4 is an explanatory view showing a modification of the wafer type common mode choke coil of the present invention. Figure 5: Circuit diagram of a common-mode choke coil with 2-circuit 4-terminal 〇 Stomach 6: A perspective view of a conventional winding-type common-mode choke coil. Stomach 7: A perspective view of the core structure used in a conventional wound-type common mode choke coil. Fig. 8 is a perspective view of the core structure of a conventional wound type common mode choke coil.王要兀Parts comparison table•Flange-11 - 1291184 (8) la, lb: electrode (input terminal) 2: flange 2 a , 2b : electrode (output terminal) 3 : coil 3 a , 3b : end 4 : coil 4 a > 4b : end 5a , 5b • groove 6a , 6b : recess 6 a , , 6b ' = shoulder 7 : groove 8 : groove 9 = top plate 10 : core 11 : core 20 : core 2 1 : Core
-12--12-