201212063 六、發明說明： 【發明所屬之技術領域】 本發明涉及用於電感器、變壓器及其他電子機器之線圈 封入壓粉磁芯及其製造方法。 【先前技術】 近年來電氣、電子機器不斷小型化，需要小型（低高 度）且能應對大電流之壓粉磁芯。先前，壓粉磁芯之材料 使用鐵氧體粉末，但最近使用適合於需要大電流之用途之 強磁性金屬粉末，其與鐵氧體粉末相比，飽與磁通密度較 大’於尚磁場下仍可保持直流重疊特性。 專利文獻1提出有如下結構：將空芯線圈埋入包含磁性 金屬粉之壓粉成形體内，且將與空芯線圈之邊緣部連接之 编子電極沿著壓粉成形體之外表面折彎並收納於壓粉成形 體表面上形成之端子收納凹部内。 [專利文獻1]日本專利特開2003-309024號公報 【發明内容】 [發明所欲解決之問題] 於。亥專利文獻1中’與壓粉成形體之端子收納凹部於平 面上重疊之位置上，將自壓粉成形體突出之端子電極折 彎。即’端子電極之折彎部分位於端子收納凹部之寬度 内。然而’此種線圈封入壓粉磁芯需要小型化（低高度 化）’若於形成有端子收納凹部之壓粉成形體之薄壁部將 端子電極折彎，則於端子電極折彎時會對壓粉成形體施加 力’因此壓粉成形體容易產生裂紋。 154421.doc 201212063 本發明之目的在於提供一種線圈封入壓粉磁芯及其製造 方法，於將端子電極自壓粉成形體引出之線圈封入壓粉磁 芯中，提高端子電極周圍之壓粉成形體之強度，於端子電 極之折彎等加工時，壓粉成形體上不會產生裂紋或斷裂。 [解決問題之技術手段] 本發明係-種線圈封入壓粉磁芯，其包括··空芯線圈； 強磁性金屬粉之壓粉成形體，其中埋入該空芯線圈；端子 電極，其包含於該壓粉成形體内與前述空芯線圈之邊緣部 連接之連接端部，及自該連接端部延長並突出至壓粉成形 體外之外部連接用之端子部；該端子電極之端子部沿著壓 粉成形體表面折·驚，並收納於該壓粉成形體表面上形成之 端子收納凹部内’·其特徵在於，前述壓粉成形體具有薄壁 部與厚壁部，該薄壁部具有前述端子收納凹部，該厚壁部 與該薄壁部相鄰；且前述端子電極之連接端部位於 粉成形體之厚壁部内。 前述空芯線圈㈣相子電極較佳為包含不同構件 5亥空芯線圈之邊緣部與前述端子電極之連接端部予以接 合。或者前述空芯線圈與前述端子電極較佳為包含同—構 徵:於封;::磁_造方法之態樣之特 之連接端部步驟.準備包含與空芯線圈之邊緣部連接 …及自該連接端部延長之外部連翻 =!之端子電極零件，且將該端子電極零件之連:端 p —心線圈之邊緣部接合’·於使前述端子電極零件之端 15442l.doc 201212063 :部突出之狀態下，將該端子電極零件之連接端部與前述 空芯線圈埋人強磁性金屬粉内，並加以壓縮而形成壓粉成 形體；以及將自前述壓粉成形體突出之端子部，㈣壓粉 成形體之外表面折彎；且於形成前述壓粉成形體之V驟 中，於前述壓粉成形體之表面，在與使前述端子電極零件 之端：部突出之位置於平面上不重疊之位置上，形成用以 收納則述端子部之端子收納凹部。 [發明之效果] 根據本發明之線圈封入壓粉磁芯及其製造方法，由於與 空芯線圈之邊緣部連接之端子電極之連接端部位於壓粉成 形體之厚壁部内’因此可提高端子電極周圍之壓粉成形體 之強度，於端子電極之折彎等加工時，可防止麼粉成形體 產生裂紋或斷裂。 【實施方式】 圖1表示適用本發明之線圈封入壓粉磁芯之一實施形 態。線圈封入壓粉磁芯丨包括：空芯線圈2;埋入有該空芯 線圈2之包含強磁性金屬粉之壓粉成形體3 ;以及與空芯線 圈2電性連接之端子電極4。 空芯線圈2係將經絕緣覆膜之導線捲繞為螺旋狀而形 成且具有自位於播繞部2a之上下表面之始端、終端向相 互離開之方向引出之邊緣部（一對引出端部）2b、2b。空芯 線圏2之阻數可根據所需之電感而適當設定。 粉成形體3係對包含塗敷有絕緣材料之強磁性金屬粒 子之磁性粉末進行壓製成形而形成，且形成覆蓋空芯線圈 154421.doc 201212063 2周圍之大致長方體狀。該壓粉成形體3於與外部電路之連 接所使用之安裝面（壓粉成形體表面）3a上具有用以收納端 子電極4之端子收納凹部3〇。端子收納凹部3〇係於安裝面 3a之對向之一對邊即於壓粉成形體3之側面3b、3c露出而 形成’可將端子電極4之一部分折彎並收納於其中。端子 收納凹部30之深度為0.225 mm左右，可使高度相應地降低 該深度量。於壓粉成形體3所使用之強磁性金屬粒子中， 可使用Fe、Fe基非晶質合金、Fe-Ni合金、Fe-Si合金等， 作為塗敷於強磁性金屬粒子之絕緣材料，可使用矽酮樹 脂、環氧樹脂等。 於該壓粉成形體3中，形成有端子收納凹部30之區域為 壓粉成形體3之厚度較小之薄壁部α ’未形成有端子收納凹 部30之區域為壓粉成形體3之厚度較大之厚壁部β。 端子電極4係藉由將薄板狀之電極板折彎加工而形成 者，其包括：埋設於壓粉成形體3内部之連接端部4〇及爪 部41 ;以及突出至壓粉成形體3外之端子部42 ^連接端部 40及爪部41自端子部42之寬度方向之兩端部延伸，以對麻 於端子部42之寬度尺寸之間隔隔開》端子部42之寬度尺寸 與端子收納凹部30之寬度尺寸相等或稍小。圖1之虛線為 折彎線。 連接端部40位於壓粉成形體3之厚壁部β内，並於該厚壁 部β中，與引出至壓粉成形體3之側面3b或3c附近之空芯線 圈2之邊緣部2b電性連接。該端子電極4之連接端部4〇與空 芯線圈2之邊緣部2b之接合（接線）可藉由例如點焊而實現。 154421 .doc •6- 201212063 爪部41位於夾著薄壁部α而與連接端部4〇所在之厚壁部β 為相反側之厚壁部β，作為將端子電極4相對壓粉成形體3 穩定固定之保持機構發揮功能。於本實施形態中，連接端 部40與爪部41以針對端子部42之中心位置而對稱配置之方 式定位°該爪部41相對於壓粉成形體3之側面3b或3c而僅 傾斜特定角度Θ(圖3)，因此難以自壓粉成形體3脫落。爪部 41與空芯線圈2未電性連接。再者，於端子電極4具有充分 之剛性時、或以接著等方法將端子部42固定於壓粉成形體 3之端子收納凹部3〇時，亦可以省略該爪部41。 端子部42於與薄壁部α相鄰之厚壁部p中，自壓粉成形體 3之側面3b或3c突出。該端子部42包括：自連接端部4〇及 爪部41向壓粉成形體3之側面3b或3c折彎之第一折彎部 42a ;以及自該第一折彎部42a向壓粉成形體3之安裝面“ 之端子收納凹部30折彎之第二折彎部42b。經由露出於安 裝面3a之第二折彎部42b，可實現壓粉成形體3内之空芯線 圈2與外部電路之電性連接。即，端子電極4作為表面安裝 端子發揮功能。 下面，參照圖2〜圖6說明應用本發明之線圈封入壓粉磁 芯之製造方法之一實施形態。 首先，如圖2及圖3所示，準備設有多個包含上述連接端 部40、爪部41及端子部42之端子電極形狀部4,之薄板狀之 端子電極板（端子電極零件）45。端子電極形狀部4,於隔開 空料圈2之設置空間45b之狀態下以使彼此之連接端部二 及爪部41對向之方式一對對地組合，並連結於支承框 154421.doc 201212063 45a。於端子電極板45上隔開特定間隔而排列有多對該一 對端子電極形狀部4,。 其人準備多個空芯線圈2,如圖4所示，將端子電極板 之各知子電極形狀部4之連接端部4〇與空芯線圈2之邊緣 部2b接合。接合係使用例如點焊。藉由該接合，使多個空 芯線圈2與端子電極板45_體化，而使對應之空芯線圈績 端子電極形狀部4'電性連接。 繼而，準備包含塗敷有絕緣材料之強磁性金屬粒子之磁 性粉末’於使各端子電極形狀部4，之端子部42露出之狀態 下，將連接端部40與爪部41及空芯線圏2埋入磁性粉末 内，並加以壓縮而分別形成壓粉成形體3。於該壓縮成形 時，使用未圖示之包含下衝頭及上衝頭之成形模具，於成 為壓粉成形體表面之面上，在與各端子部42之突出位置於 平面上不重疊之位置上形成端子收納凹部3〇。若於成形模 具之下衝頭及上衝頭上預先設置與欲形成之端子收納凹部 30對應之形狀之凸部，經由該凸部壓縮磁性粉末，則可形 成期望形狀之端子收納凹部3 〇。由此，如圖5所示，獲得 於女裝面（壓粉成形體表面）3a上形成有端子收納凹部3〇之 壓粉成形體3。 於上述壓粉成形體3中’形成有端子收納凹部3〇之薄壁 部α與端子電極形狀部4,之端子部42之突出位置於平面上 不重疊。即’端子電極形狀部4,之連接端部4〇及爪部41位 於壓粉成形體3之未形成有端子收納凹部3〇之厚壁部β，且 端子部42自該厚壁部β突出。 154421.doc 201212063 然後’於以圖5之虛線所示之切斷線I將端子電極板之支 承框45a切掉。由此，各端子電極形狀部4,分割為各個端子 電極4 ’從而同時獲得多個具有空芯線圈2、壓粉成形體3 及端子電極4之線圈封入壓粉磁芯。 繼而’針對各個線圈封入壓粉磁芯，如圖6所示將自壓 粉成形體3之側面3b或3c之厚壁部β突出之端子電極4之端 子部42沿著該側面儿或3c折彎。沿著該側面补或3c之部分 成為第一折彎部42a。進而，將該第一折彎部42a沿著壓粉 成形體3之端子收納凹部3〇折彎。沿著端子收納凹部3〇之 部分為第二折彎部42b。由此，獲得圖i之線圈封入壓粉磁 芯卜 圖7及圖8表示適用本發明之線圈封入壓粉磁芯之第二實 細•幵y態。忒第二貫施形態與上述第一實施形態不同之處在 於，空芯線圈2具有自位於捲繞部2a之上下表面之始端、 終端平行（同一引出方向）引出之邊緣部（一對引出端 部）2b、2b ’且該兩邊緣部2b之導線之長度方向與端子電 極4之連接端部40之長度方向以相互交又9〇度之位置關係 電性連接。除兩邊緣部2b之引出方向及兩邊緣部几與連接 端部4〇之連接部分之外之結構與第一實施形態相同。 若如此將空芯線圈2之兩邊緣部几向同一方向引出，則 與將兩邊緣部2b以相互隔開之方式引出之第_實施形態相 比，可將導線多捲繞約半圈，因此可多取得約〇·5 τ之匝 數。又，可使兩緣部2b位於空芯線圈2之捲繞部2a之外側 (參照圖8)，因此可更寬地確保端子電極4之端子部42之寬 154421.doc 201212063 度尺寸，於外部電路基板上安裝本線圈封入壓粉磁芯i 時，可提高其位置精度之自由度。同時，可擴大外部電路 基板之焊接用焊盤與端子電極4(尤其為第二折彎部42b)之 接著面積’因此接著強度亦提高。 該第二實施形態之線圈封入壓粉磁芯可藉由與上述第一 實施形態相同之製造步驟進行製造，但將多個空芯線圈2 分別接合於端子電極板45之各端子電極4時，如圖8所示， 將於同一方向上引出之空芯線圈2之兩邊緣部几與端子電 極板45之各端子電極形狀部4,之連接端部4〇以相互交叉9〇 度之位置關係電性連接。 根據以上之各實施形態，由於使與空芯線圈2之邊緣部 2b連接之端子電極4之連接端部4〇位於壓粉成形體3之厚壁 部β，因此可確保充分大之自該連接端子部4〇延長並突出 至壓粉成形體3外之端子部4 2之折彎位置（第—折彎部4 2 & 之折彎位置）周邊之壓粉成形體3之厚度，可防止壓粉成形 體發生裂紋或斷裂。 以上，對空芯線圈2與端子電極4包含不同構件且使空芯 線圈2之邊緣部2b與端子電極4之連接端部接合之實施形態 進行了說明，但空芯線圈與端子電極亦可包含同—構件。 【圖式簡單說明】 圖1係表示本發明之線圈封入壓粉磁芯之第一實施形態 之局部透視立體圖。 圖2係表示圖i之線圈封入壓粉磁芯之製造中使用之端子 電極板（端子電極零件）之平面圖。 15442l.doc 201212063 圖3係將圖2之端子電極形狀部加以放大後表示之圖。 圖4係表示適用本發明之線圈封入壓粉磁芯之製造方法 之一步驟之圖。 圖5係表示圖4之下一步驟之圖。 圖6係表示圖5之下一步驟之圖。 圖7係表示適用本發明之線圈封入壓粉磁芯之第二實施 形態之局部透視立體圖。 圖8係表示第二實施形態之線圈封入壓粉磁芯之製造方 法之^步驟之圖。 【主要元件符號說明】 1 線圈封入壓粉磁芯 2 空芯線圈 2a 捲繞部 2b 邊緣部 3 壓粉成形體 3a 安裝面（表面） 3b、3c 側面 4 端子電極 4， 端子電極形狀部 30 端子收納凹部 40 連接端部 41 爪部 42 端子部 42a 第一折彎部 154421.doc 201212063 42b 第二折彎部 45 端子電極板（端子電極零件） 45a 支承框 45b 設置空間 Θ 角度 a 薄壁部 β 厚壁部 154421.doc - 12-201212063 VI. Description of the Invention: [Technical Field] The present invention relates to a coil-sealed powder magnetic core for an inductor, a transformer, and other electronic equipment, and a method of manufacturing the same. [Prior Art] In recent years, electrical and electronic equipment have been continuously miniaturized, and it is required to have a small (low-high) powder magnetic core capable of coping with a large current. Previously, the material of the powder magnetic core used ferrite powder, but recently, a ferromagnetic metal powder suitable for applications requiring a large current has been used, which has a higher saturation magnetic flux density than the ferrite powder. The DC overlap characteristics can still be maintained. Patent Document 1 proposes a structure in which an air core coil is embedded in a powder compact including a magnetic metal powder, and a braid electrode connected to an edge portion of the hollow core coil is bent along an outer surface of the powder compact. And stored in the terminal housing recess formed in the surface of the powder compact. [Patent Document 1] Japanese Patent Laid-Open No. 2003-309024 SUMMARY OF THE INVENTION [Problems to be Solved by the Invention] In the patent document 1, the terminal electrode protruding from the powder compact is bent at a position where the terminal housing recess of the powder molded body overlaps the flat surface. That is, the bent portion of the terminal electrode is located within the width of the terminal housing recess. However, when such a coil is sealed with a powder magnetic core, it is required to be miniaturized (lower height). When the thin electrode portion of the powder molded body in which the terminal housing recess is formed is bent, the terminal electrode is bent. The pressed powder molded body exerts a force 'therefore, the pressed powder molded body is liable to cause cracks. 154421.doc 201212063 An object of the present invention is to provide a coil-sealed powder magnetic core and a method for manufacturing the same, in which a coil from which a terminal electrode is drawn from a powder compact is sealed in a powder magnetic core, and a powder compact formed around the terminal electrode is improved. The strength does not cause cracks or breakage in the powder compact when the terminal electrode is bent or the like. [Technical means for solving the problem] The present invention relates to a coil-sealed powder magnetic core including: an air core coil; a powder compact of a ferromagnetic metal powder in which the hollow core coil is embedded; and a terminal electrode including a connecting end portion connected to the edge portion of the hollow core coil in the powder molding body, and a terminal portion extending from the connecting end portion and protruding to the external connection outside the powder molding body; the terminal portion of the terminal electrode The surface of the powder molded body is folded and caught in the terminal housing recess formed on the surface of the powder molded body. The powder molded body has a thin portion and a thick portion, and the thin portion The terminal housing recessed portion has a thick portion adjacent to the thin portion, and the connecting end portion of the terminal electrode is located in a thick portion of the powder molded body. Preferably, the air core coil (four) phase sub-electrode includes a different member 5 and the edge portion of the hollow core coil is joined to the terminal end of the terminal electrode. Or the air-core coil and the terminal electrode preferably include the same structure: the sealing end of the magnetic core-forming method: the connection end portion is prepared to include the edge portion of the hollow core coil... and The terminal electrode component of the terminal is extended from the outside of the connection end, and the terminal electrode component is connected: the end p-the edge of the core coil is joined to the end of the terminal electrode component 15442l.doc 201212063: In a state in which the portion is protruded, the connection end portion of the terminal electrode member and the hollow core coil are buried in the ferromagnetic metal powder, and compressed to form a powder compact; and a terminal portion protruding from the powder molded body (4) the outer surface of the powder compact is bent; and in the step S of forming the powder compact, the surface of the powder molded body is at a position protruding from the end portion of the terminal electrode member. A terminal housing recess for accommodating the terminal portion described above is formed at a position where the upper portion does not overlap. [Effects of the Invention] According to the coil-sealed powder magnetic core of the present invention and the method of manufacturing the same, since the connection end portion of the terminal electrode connected to the edge portion of the hollow core coil is located in the thick portion of the powder molded body, the terminal can be improved. The strength of the powder compact formed around the electrode prevents cracking or cracking of the powder molded body when the terminal electrode is bent or the like. [Embodiment] Fig. 1 shows an embodiment in which a coil-sealed powder magnetic core to which the present invention is applied is applied. The coil enclosing the powder magnetic core 丨 includes: an air core coil 2; a powder compact 3 containing the ferromagnetic metal powder embedded in the hollow core coil 2; and a terminal electrode 4 electrically connected to the hollow core coil 2. The air-core coil 2 is formed by winding a wire of the insulating film in a spiral shape and having an edge portion (a pair of lead ends) which are drawn from the beginning end of the lower surface of the broadcast portion 2a and the terminal ends in a direction away from each other. 2b, 2b. The number of resistances of the hollow core 圏2 can be appropriately set according to the required inductance. The powder molded body 3 is formed by press-molding a magnetic powder containing ferromagnetic metal particles coated with an insulating material, and is formed into a substantially rectangular parallelepiped shape covering the periphery of the hollow core coil 154421.doc 201212063 2 . The powder molded body 3 has a terminal housing recess 3b for accommodating the terminal electrode 4 on a mounting surface (the surface of the powder molded body) 3a used for connection to an external circuit. The terminal accommodating recessed portion 3 is formed on the side faces 3b and 3c of the powder molded body 3 by the opposite sides of the mounting surface 3a. The portion of the terminal electrode 4 can be bent and housed therein. The depth of the terminal housing recess 30 is about 0.225 mm, and the height can be reduced accordingly. In the ferromagnetic metal particles used in the powder compact 3, Fe, Fe-based amorphous alloy, Fe-Ni alloy, Fe-Si alloy, or the like can be used as the insulating material applied to the ferromagnetic metal particles. An anthrone resin, an epoxy resin, or the like is used. In the powder molded body 3, the region in which the terminal housing recess 30 is formed is a thin portion α having a small thickness of the powder molded body 3, and the region in which the terminal housing recess 30 is not formed is the thickness of the powder molded body 3. Larger thick wall portion β. The terminal electrode 4 is formed by bending a thin plate-shaped electrode plate, and includes: a connecting end portion 4〇 and a claw portion 41 embedded in the interior of the powder compact 3; and protruding to the outside of the powder compact 3 The terminal portion 42 and the connecting end portion 40 and the claw portion 41 extend from both end portions in the width direction of the terminal portion 42 so as to be spaced apart from each other by the width dimension of the terminal portion 42. The width of the recess 30 is equal or slightly smaller. The dotted line in Figure 1 is the bend line. The connecting end portion 40 is located in the thick portion β of the powder compact 3, and is electrically connected to the edge portion 2b of the hollow core coil 2 which is drawn to the side 3b or 3c of the powder compact 3 in the thick portion β. Sexual connection. The joining (wiring) of the connecting end portion 4'' of the terminal electrode 4 to the edge portion 2b of the hollow core coil 2 can be realized by, for example, spot welding. 154421 .doc •6- 201212063 The claw portion 41 is located at the thick portion β opposite to the thick portion β where the connecting end portion 4 is located, sandwiching the thin portion α, as the terminal electrode 4 is opposed to the powder compact 3 A stable and fixed holding mechanism functions. In the present embodiment, the connecting end portion 40 and the claw portion 41 are positioned symmetrically with respect to the center position of the terminal portion 42. The claw portion 41 is inclined only by a specific angle with respect to the side surface 3b or 3c of the powder compact 3. Θ (Fig. 3), it is difficult to peel off the powder compact 3. The claw portion 41 is not electrically connected to the air core coil 2. Further, when the terminal electrode 4 has sufficient rigidity or when the terminal portion 42 is fixed to the terminal housing recess 3 of the powder molded body 3 by a method such as the following, the claw portion 41 may be omitted. The terminal portion 42 protrudes from the side surface 3b or 3c of the powder compact 3 in the thick portion p adjacent to the thin portion α. The terminal portion 42 includes: a first bent portion 42a bent from the connecting end portion 4'' and the claw portion 41 toward the side surface 3b or 3c of the powder compact 3; and a powder forming from the first bent portion 42a The second bending portion 42b of the mounting surface of the body 3 in which the terminal housing recess 30 is bent. The hollow core coil 2 and the outer portion of the powder molded body 3 can be realized via the second bent portion 42b exposed on the mounting surface 3a. The terminal electrode 4 functions as a surface mount terminal. Next, an embodiment of a method of manufacturing a coil-sealed powder magnetic core to which the present invention is applied will be described with reference to Figs. 2 to 6 . As shown in Fig. 3, a plurality of terminal electrode plates (terminal electrode members) 45 each having a terminal electrode shape portion 4 including the connection end portion 40, the claw portion 41, and the terminal portion 42 are provided. The terminal electrode shape portion is provided. 4, in a state in which the space 45b of the empty bead 2 is partitioned, the connecting end portions 2 and the claw portions 41 are opposed to each other in a pairwise manner, and are coupled to the support frame 154421.doc 201212063 45a. The terminal electrode plate 45 is arranged with a plurality of intervals on the pair of ends In the electrode shape portion 4, a plurality of air-core coils 2 are prepared, and as shown in FIG. 4, the connection end portions 4 of the respective electrode-shaped electrode portions 4 of the terminal electrode plates are joined to the edge portions 2b of the air-core coil 2. For the bonding system, for example, spot welding is used. By this bonding, the plurality of air-core coils 2 and the terminal electrode plates 45_ are formed, and the corresponding hollow core coil terminal electrode shape portions 4' are electrically connected. The magnetic powder of the ferromagnetic metal particles coated with the insulating material embeds the connecting end portion 40, the claw portion 41, and the hollow core 圏2 in the state in which the terminal portions 42 of the terminal electrode shape portions 4 are exposed. The compressed powder molded body 3 is formed by compression and compression molding. In the compression molding, a molding die including a lower punch and an upper punch (not shown) is used to form a surface of the surface of the powder molded body. The protruding position of each of the terminal portions 42 forms a terminal housing recess 3 at a position where the projections do not overlap on the plane. If the punch and the upper punch are provided under the molding die, a convex portion corresponding to the shape of the terminal housing recess 30 to be formed is provided in advance. , compressing magnetism via the convex portion At the end, the terminal housing recess 3 is formed in a desired shape. As shown in Fig. 5, the powder molded body 3 in which the terminal housing recess 3 is formed on the women's surface (the surface of the powder molded body) 3a is obtained. In the powder compact 3, the thin portion α and the terminal electrode portion 4 in which the terminal housing recess 3 is formed, the protruding positions of the terminal portions 42 do not overlap on the plane. That is, the terminal electrode shape portion 4, The connecting end portion 4A and the claw portion 41 are located in the thick portion β of the powder molded body 3 in which the terminal housing recessed portion 3 is not formed, and the terminal portion 42 protrudes from the thick portion β. 154421.doc 201212063 Then The support frame 45a of the terminal electrode plate is cut away by the cutting line I shown by the broken line in Fig. 5 . Thereby, each of the terminal electrode shape portions 4 is divided into the respective terminal electrodes 4', and a plurality of coils having the air core coil 2, the powder molded body 3, and the terminal electrode 4 are simultaneously sealed with the powder magnetic core. Then, the powder core is sealed for each coil, and the terminal portion 42 of the terminal electrode 4 protruding from the thick portion β of the side surface 3b or 3c of the powder compact 3 is folded along the side or 3c as shown in FIG. bend. The portion along the side complement or 3c becomes the first bent portion 42a. Further, the first bent portion 42a is bent along the terminal housing recess 3' of the powder molded body 3. The portion along the terminal housing recess 3 is the second bent portion 42b. Thus, the coil encapsulating the powder magnetic core of Fig. i is obtained. Fig. 7 and Fig. 8 show the second actual 幵y state of the coil-sealed powder magnetic core to which the present invention is applied. The second embodiment is different from the above-described first embodiment in that the air-core coil 2 has an edge portion (a pair of terminals) which are drawn from the beginning of the lower surface of the winding portion 2a and the terminals are parallel (the same drawing direction). The portions 2b, 2b' and the longitudinal direction of the wires of the both edge portions 2b and the longitudinal direction of the connection end portion 40 of the terminal electrode 4 are electrically connected in a positional relationship of 9 degrees to each other. The structure other than the lead-out direction of the both edge portions 2b and the connection portions between the both edge portions and the connection end portions 4b is the same as that of the first embodiment. When the both edge portions of the air-core coil 2 are drawn in the same direction in a plurality of directions, the wire can be wound more than half a turn in comparison with the first embodiment in which the two edge portions 2b are separated from each other. You can get more than 〇·5 τ. Further, since the both edge portions 2b can be positioned outside the winding portion 2a of the air-core coil 2 (see Fig. 8), the width of the terminal portion 42 of the terminal electrode 4 can be more widened by 154421.doc 201212063 degrees, and externally When the coil is mounted on the circuit board and the powder magnetic core i is sealed, the degree of freedom in positional accuracy can be improved. At the same time, the bonding pad of the external circuit board and the subsequent area of the terminal electrode 4 (especially the second bent portion 42b) can be enlarged, so that the strength is also improved. The coil-sealed powder magnetic core of the second embodiment can be manufactured by the same manufacturing steps as those of the first embodiment, but when the plurality of air-core coils 2 are bonded to the respective terminal electrodes 4 of the terminal electrode plate 45, As shown in FIG. 8, the edge portions of the air core coil 2 which are drawn in the same direction and the terminal electrode shape portions 4 of the terminal electrode plates 45 are connected to each other at a position of 9 degrees. Electrical connection. According to the above embodiments, the connection end portion 4 of the terminal electrode 4 connected to the edge portion 2b of the air-core coil 2 is located at the thick portion β of the powder molded body 3, thereby ensuring a sufficiently large connection from the connection. The terminal portion 4〇 is extended and protrudes to the thickness of the powder molded body 3 around the bent portion (the bent position of the first bent portion 4 2 &) of the terminal portion 4 2 outside the powder molded body 3, thereby preventing The powder compact is cracked or broken. Although the air core coil 2 and the terminal electrode 4 include different members and the edge portion 2b of the air core coil 2 is joined to the connection end portion of the terminal electrode 4, the air core coil and the terminal electrode may be included. Same as - component. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partially perspective perspective view showing a first embodiment of a coil-sealed powder magnetic core of the present invention. Fig. 2 is a plan view showing a terminal electrode plate (terminal electrode member) used in the manufacture of the coil-sealed powder magnetic core of Fig. i. 15442l.doc 201212063 FIG. 3 is an enlarged view of the terminal electrode shape portion of FIG. 2 . Fig. 4 is a view showing a step of a method of manufacturing a coil-sealed powder magnetic core to which the present invention is applied. Figure 5 is a diagram showing a step in the lower step of Figure 4. Figure 6 is a diagram showing a step in the lower step of Figure 5. Fig. 7 is a partially perspective perspective view showing a second embodiment of a coil-sealed powder magnetic core to which the present invention is applied. Fig. 8 is a view showing the steps of the method of manufacturing the coil-sealed powder magnetic core of the second embodiment. [Description of main component symbols] 1 Coil sealed powder core 2 Air core coil 2a Winding part 2b Edge part 3 Powder molded body 3a Mounting surface (surface) 3b, 3c Side 4 Terminal electrode 4, Terminal electrode shape part 30 Terminal Storage recess 40 connection end portion 41 claw portion 42 terminal portion 42a first bent portion 154421.doc 201212063 42b second bent portion 45 terminal electrode plate (terminal electrode member) 45a support frame 45b space Θ angle a thin portion β Thick wall 154421.doc - 12-