200412814 玖、發明說明 【發明所屬之技術領域】 本發明係一種動圏式喇叭雙磁場驅動結構 【先前技術】 習知之動圈式喇叭單體驅動結構係由一中空環形石兹 鐵及內置導磁軟鐵構成之固件’將直筒式線圈置於兩磁 極間隙內，外部連接彈性支撐物及振膜作爲動件，即可 因輸入線圈之脈衝電流大小，轉換爲相對之推力，使空 氣振動，產生聲波。 以中空環形磁鐵、導磁軟鐵、直筒式線圈及密閉式彈 性支撐物構成之動圏式喇叭驅動結構（圖一），有下列 缺點· 1·爲維持環形磁極間隙內之磁場強度，環形磁鐵佔 用之厚度、體積及重量必須相對變大，且所有磁 體之有效磁力線，兩極平面最強，中段最弱，動 件線圈僅能±作於部分有效區域內（N—S —N的 單向磁場區段），磁場利用率受限。 2. 固件與動件之間，爲維持直線運動，必須以密合 之彈性體作支撐，線圈作動時產生.之高溫，因前 後皆爲密閉空間’致散熱不良，極易損壞。 3. 線圈因過熱或人爲操作不當原因損壞時，無法取 200412814 出維修，必須更換新品，造成浪費。 ’ 【內容】 上述磁場利用率低，密閉空間散熱不良及線圈損壞不 易維修等缺失，本發明提出下列替代方法： 1. 以平面渦卷式線圈或同軸式線圏取代直筒式線 圏，作爲本驅動結構之動件。 如電動機定則所示，一載電流之導體置於磁場 中，於磁場與電流的作用下，將產生機械力F， 方向與磁場、電流之方向互爲垂直，其量値爲F = Bli sine，當電流或磁場方向反轉時，機械力F 的方向亦隨之改變，若兩者同時反向，則機械力 F的方向保持不變。.爲取得與雙向磁場垂直之最 大面積導線長度及設定動態平衡位置，平面渦卷 式線圈（圖二）或同軸式線圏（圖三）之構造及 設定動態平衡位置，如圖所示。 2. 可拆式線圏載體（圖四），固定線圏£，並作爲連 接振膜與開放式彈性支撐體之介面。構造如圖所 示。 、 3. 雙實心磁體取代中空環形磁體，作爲本驅動結構 之固件。 兩片實心磁體以磁力較弱的側面首尾互相連 200412814 接，最大磁通密度之N、S極面，以串列（圖五） 或並列（圖六）方式，固定於U型導磁體或任何 與實心磁體N、S極面平行之導磁體側面，即可 將磁場導引至另一側平行位置，產生雙向磁場效 應（N—S ’ S —N雙向），並使固件成爲開放式空 間結構。 4.以開放式彈性支撐體取代密閉式彈性支撐體作 爲本驅動結構之支撐件。 固件之構造改變，線圈及載體作動時，不再受限 於密閉空間內，支撐體僅具維持動態平衡作用， 構造及配置位置如（圖七）所示。 . 綜上所述，本發明係以平面渦卷式線圈和同軸式 線圏及可拆式線圏載體作爲動件，雙實心磁體及 導磁體作爲固件，開放式彈性支撐體作爲支撐件 共同構成之動圈式喇叭雙磁場驅動結構（圖八、 圖九），特點在於： 1、 改變單向磁場N->S —N模式，增益爲N—S、S —N 雙向磁場利用率，並可減少磁體佔用之體積、重量。 2、 磁體與導磁體平行排列形成之開放性空間架構，空 氣易對流，有助於減少線圏之熱損耗。 3、 磁體位置不變，僅改變動件方向，可讓驅動方向作 8 200412814 單向或雙向設定。 4、可拆式線圏載體，檢知、更換容易，不須破壞本體 結構。 【實施方式】 在圖八中，可拆式線圏載體（圖四）前端以插件方式 與振膜結合，兩片實心磁鐵及U形導磁軟鐵作成的固件 (圖五），固定於喇叭框架的中心位置，先校正線圈與 固件的動態平衡位置，後以開放式彈性支撐體（圖七）， 連接線圈載體（圖四），再作最後階段的調整。 固件位置不變，改變動件方向，可讓驅動方向作單向 或雙向設定。 200412814 【圖式簡單說明】 第一圖爲習知之動圈式喇叭結構圖 第二圖爲本驅動結構之平面渦卷式線圏構造圖 第三圖爲本驅動結構之同軸式線圏構造圖 第四圖爲本驅動結構之可拆式線圏載體構造圖 第五圖爲本驅動結構實心磁體串列排列構造圖 第六圖爲本驅動結構實心磁體並列排列構造圖 第七圖爲本驅動結構開放式彈性支撐體構造及配 置位置圖 第八圖爲本驅動結構之最佳實施例圖 第九圖爲本驅動結構之另一實施例圖 第十圖爲本驅動結構之另一實施例圖 200412814 圖示各元件符號說明： I :電流向上方向 2:電流向下方向 3:動態平衡位置 4 :機械力F作用方向200412814 发明. Description of the invention [Technical field to which the invention belongs] The present invention is a dynamic magnetic horn dual magnetic field driving structure [prior art] The conventional single driving structure of a dynamic coil horn is composed of a hollow ring-shaped stone and a built-in magnetic permeability The firmware composed of soft iron 'puts the straight coil in the gap between the two magnetic poles, and externally connects the elastic support and the diaphragm as the moving parts. The pulse current of the input coil can be converted into the relative thrust, which causes the air to vibrate and generate Sound waves. The dynamic horn-type horn drive structure composed of a hollow ring magnet, a magnetically permeable soft iron, a straight coil, and a closed elastic support (Figure 1) has the following disadvantages: 1. To maintain the magnetic field strength in the gap between the ring poles, the ring magnet The occupied thickness, volume, and weight must be relatively large, and the effective magnetic field lines of all magnets have the strongest two-pole planes and the weakest mid-sections. The moving coil can only be used within a certain effective area (N-S-N unidirectional magnetic field area) Paragraph), magnetic field utilization is limited. 2. In order to maintain linear motion between the firmware and the moving parts, a tight elastic body must be used to support it. The high temperature generated when the coils are actuated, because the front and back are closed spaces, which causes poor heat dissipation and is easily damaged. 3. When the coil is damaged due to overheating or improper operation, it cannot be taken out for repair. It must be replaced with a new one, resulting in waste. '[Contents] The above-mentioned low magnetic field utilization rate, poor heat dissipation in confined spaces, and poor coil damage are not easy to repair. The present invention proposes the following alternative methods: 1. Replace planar straight coils with flat scroll coils or coaxial coils as Actuator of driving structure. As shown in the motor rules, a current-carrying conductor is placed in a magnetic field. Under the action of the magnetic field and the current, a mechanical force F is generated. The direction is perpendicular to the direction of the magnetic field and the current. The quantity 値 is F = Blisine. When the direction of the current or magnetic field is reversed, the direction of the mechanical force F also changes. If the two directions are reversed at the same time, the direction of the mechanical force F remains unchanged. In order to obtain the maximum area wire length perpendicular to the two-way magnetic field and set the dynamic balance position, the structure of the planar scroll coil (Figure 2) or coaxial coil (Figure 3) and the dynamic balance position are set, as shown in the figure. 2. Detachable wire carrier (Figure 4), fixed wire 圏 £, and serve as the interface between the diaphragm and the open elastic support. The structure is shown in the figure. 3. The double solid magnet replaces the hollow ring magnet as the firmware of the drive structure. The two solid magnets are connected to each other with the weaker side by end 2004200414. The N and S pole faces of the maximum magnetic flux density are fixed in series (Figure 5) or side by side (Figure 6) to the U-shaped magnet or any The side of the magnet guide parallel to the N and S pole faces of the solid magnet can guide the magnetic field to the parallel position on the other side, generating a bidirectional magnetic field effect (N-S'S-N bidirectional), and making the firmware an open space structure . 4. The open elastic support body is used instead of the closed elastic support body as the support member of the driving structure. The structure of the firmware is changed. When the coil and the carrier are actuated, they are no longer confined to the enclosed space. The support body only has the function of maintaining dynamic balance. The structure and configuration position are shown in (Figure 7). In summary, the present invention is composed of a flat scroll coil, a coaxial coil and a detachable coil carrier as the moving parts, a double solid magnet and a guide magnet as the firmware, and an open elastic support as the support. The moving magnetic horn dual magnetic field driving structure (Figures 8 and 9) is characterized by: 1. Changing the unidirectional magnetic field N- > S-N mode, the gain is N-S, S-N two-way magnetic field utilization rate, and Can reduce the volume and weight occupied by magnets. 2. The open space structure formed by the parallel arrangement of magnets and magnets, air is easy to convection, which helps to reduce the heat loss of the coils. 3. The position of the magnet does not change. Only the direction of the moving parts can be changed. The driving direction can be set in one direction or two directions. 4. Detachable wire carrier, easy to detect and replace without destroying the body structure. [Embodiment] In Figure 8, the front end of the detachable wire carrier (Figure 4) is combined with the diaphragm by a plug-in method, and two pieces of solid magnet and a U-shaped magnetically permeable soft iron are fixed to the speaker (Figure 5). At the center of the frame, first correct the dynamic balance position of the coil and the firmware, then connect the coil carrier (Figure 4) with an open elastic support (Figure 7), and then make the final adjustment. The position of the firmware is unchanged. Changing the direction of the moving parts allows the driving direction to be set unidirectionally or bidirectionally. 200412814 [Brief description of the diagram] The first picture shows the structure of a conventional moving coil horn. The second picture shows the structure of a planar scroll coil in a drive structure. The third picture shows the structure of a coaxial coil in a drive structure. The fourth figure is the structure of the detachable wire carrier of the drive structure. The fifth figure is the structure of the solid magnets in the drive structure. The sixth figure is the structure of the solid magnets in the drive structure. The seventh figure is open for the drive structure. Figure 8 Structure and configuration position of the elastic support Figure 8 shows the best embodiment of the drive structure Figure 9 shows another embodiment of the drive structure Figure 10 shows another embodiment of the drive structure 200412814 Figure The symbols of each component are shown: I: current upward direction 2: current downward direction 3: dynamic equilibrium position 4: mechanical force F action direction
5 :磁場方向N—S5: Magnetic field direction N-S
6 :磁場方向S — N 7:平面渦卷式線圏之實心載體 8:同軸式線圈之空心載體 9:線圈載體連接振膜插件 10 :線圏載體連接彈性支撐體界面 II :實心磁體之N極平面 12 :實心磁體之S極平面 13 :導磁體 14 :彈性支撐體之動件接面 15 :彈性支撐體之固件接面及調整磁鐵片 A、B :與F之方向上下垂直的部分，爲電流無效應 區段。.6: Magnetic field direction S — N 7: Solid carrier of planar scroll coil 8: Hollow carrier of coaxial coil 9: Coil carrier connected to diaphragm insert 10: Interface of wire carrier to elastic support II: N of solid magnet Pole plane 12: S pole plane of solid magnet 13: Magnet guide 14: Moving member connection surface of elastic support body 15: Firmware connection surface of elastic support body and adjusting magnet pieces A, B: vertical parts perpendicular to the direction of F, It is the current ineffective section. .