201044436 六、發明說明： '【發明所屬之技術領域】 ： 本發明係關於設有電力保險絲（fuse)的真空開閉器 之保險絲安裝構造。 【先前技術】 於第5圖示有習知的設有電力保險絲的真空開閉器。 如圖所示，於框架31係橫向排列地配置有3相份的具有固 定接點與可動接點（任一者皆未圖示）的真空斷路器32。真 〇 空斷路器32之可動接點側係經由絕緣連桿33而連結至裝 設於操作軸34的操作桿（lever)35。於操作轴34係設有可 動鐵芯36，藉由使該可動鐵芯36被電磁鐵37吸引而轉動 操作軸34，驅動操作桿35，經由絕緣連桿33而使可動接 點連接/分離於固定接點。 另一方面，固定接點側係導電連接至固定於框體 (frame)31的固定側端子38，於固定側端子38與配置於背 面侧的主電路導體（未圖不）之間係連接有電力保險絲3 9。 ◎ 電力保險絲39係被插入在安裝於裝設金屬具40的保險絲 保持件（iuseholder)41中，且從上部放上鎖裝板42而藉 由螺絲（bolt)鎖定（例如，參照專利文獻1)。 [先行技術文獻] [專利文獻] [專利文獻1]曰本實公昭62-33451號公報（第1頁、第1 圖） 【發明内容】 4 321370 201044436 . (發明所欲解決的課題） : 在如專利文獻1所示的習知真空開閉器之保險絲安裝 構造中，係因應電力保險絲39之形狀而將保險絲保持件 41之内侧形狀形成曲面。電力保險絲39之導電部與保險 絲保持件41内面部雖表面上看似以廣面積作面接觸，但實 際上為複數個點接觸或線接觸，且因電力保險絲39和保險 絲保持件41些微的形狀尺寸之差異和鎖緊之力道不同而 使接觸部位並非—定，難以特定究竟於何部分接觸。因此， 視情形會有於接觸部產生偏移而引起異常發熱之情形的問 題0 山又，專利文獻1亦揭示有於電力保險絲之長度方向的 兩，面具有端子板，且將端子板以螺絲旋緊於安裳金屬具 而女裝的構造。為如上所述之形狀的電力保險絲雖可解決 接，部偏移的問題，但市面上販售的電力保險絲多為呈有 ^弟5圖之圓筒狀端子（帽蓋（cap))的電力保險絲，真 〇閉器之電力保險絲也多 使用㈣刑“ （卿tyPe)。從而，於 ^巾。目盖型電力保險絲的真”閉器中，依然存有上述問 明係為了消除如上所述之問題點而實施者，i目 之 接險絲保持件與電力保險絲間 ，、開閉盗之保險絲安裝構造。 (解決課題的手段） 本發明之真空開閉器的伴险έ纟&# Α γ & 了固定接點與可動接點的裝構造係包含内藏 7具二断路益，且具有串聯連接於 321370 5 .201044436 :側主電路導體之間的電力保險絲：電::：固定 險絲之兩端部而予以固定的仵為.保持電力保 决，j：在入* 0保l糸保持件係具有保險絲 文八係3有固定於電路側的固定部和從該固定部之 朝末^扇形擴展而立起且以字狀傾斜㈣向 觸部，電力保險絲係至少使板技於位疚 '、心4接 導電接觸。 ^使抵接於保險絲接觸部的2處為 ο (發明效果） 依據本發明之真空開閉器的保險絲安裝構造，保 力保險絲之兩端部而加以固定的 ’、、 了固定於電路側的固定部和從固定;:兩端朝：= 字狀傾斜且相對向的保險絲接觸部的保險絲 ===㈣至少㈣接於保險絲接觸部的2處為 =電接觸’故在電力保險絲與保險絲夾和之連接部中， =了以使其於預先想定的2處確實接觸，故接觸電 ^ V ’而可獲得妓之料㈣，且提 的真空開閉器。 # 【實施方式】 第1實施形態 門哭據圖式而說明本發明第1實施形態之真空開 閉裔的保險絲安裝構造。第i圖為使 :獅安裝構造的真空開閉器之正面圖，其係:有=面 :=(fa?late)的一部份切開而可看見内部的狀 '1、°第2圖為第1圖之側面圖。 321370 6 .201044436 ==第3?所示，於搭载在台車1的絕緣框體 :的真二斷路。。 的構成真空開閉器之主電路接點 2工斷路心ac_ lnterrupter)3。真空 ο 真空容器内内藏有固定接點4和可動接點5,固定桿二： ^疋接點4導出至外部，可動稈？係從可動接點$導出 外部。固定桿6之前端側係連接至固定於絕緣框體2的 ^疋！端子8 ;可動桿7之前端側係經由絕緣桿9而連,士 端固裝於轉_1G的桿u。另外，可動桿？之= :=可挽導體而連接於被固定在絕緣框心的可動:彳 磁鐵有具有可動鐵芯13與電 电知作機構。若以電磁鐵14吸引可動鐵# η == 轉動，且連動而驅動桿U，該驅動:係 4==_)9、彻7、一5,且使兩接點 ο 電Μ用二：路益3的上方配置有：當流通有預定以上的 斷的電力保險絲15,該保險絲係依各 相使轴線朝向與固定側端子δ之導出方向平行的方向依各 =力保險絲15之一方的保險絲端子制端子部）係經 由固疋於絕緣框體2的連接導體16而連接至固定側端子 。此外’另一側之保險絲端子⑸係經由連接導體 連接至m定㈣電路物is。岐触電路 固定於台車1的支持構件19支持，於前端部8 = 主電路導體連接的接觸件2Q。此外，於各相之電 321370 1 •201044436 • 15之相間設有絕緣障板（barrier〇21。 ： 另一方面，可動側端子12係連接至朝與固定側主電 路導體18同方向導出且由支持構件19所支持的可動侧主 電路導體22，於其前端部係設有與負載側連接的接觸件 23 〇 電力保險絲15係依真空開閉器之容量而流通有數百 安培以上之電量，故確實之電性連接是非常重要的。因此， 固疋電力保險絲15的保險絲保持件24係由：藉由螺絲而 鎖緊在連接導體16及17的保險絲夾（clip)25，以及將電 力保險絲15插入保險絲夾25而從上方按壓而予以固定的 保險絲按壓件26構成。 本實施形態之真空開閉H係於上述保險絲安裳構造 具有特徵，故以下即對於保險絲保持件24進行更詳細的說 〇 广ma則險絲保持件24之斜視圖。保險絲保持 織4之保險絲夾25係使薄板銅帶於長邊方向呈u字狀地 二：’且折彎的相對向面係以朝向開口端側扇 2卿成為V字狀。U字狀之底面部係形成為平面而成 在電路側之連接導體16或17的固定部祝。將從 二P 25a之兩端往末端扇形擴展而立起且呈V字狀傾斜 目^的相對向部作為保險絲接㈣娜。於保險絲接 扣115之—方的前端部係形成有向外側^字狀彎曲的 部心定另 P 25a之申央係形成有安裝孔25e，於連接 321370 8 201044436 部25d則形成有螺絲孔25f。 另一方面，保險絲按壓件26係使薄板銅帶之中央部 微微彎曲，於一侧端部設有與保險絲夾25之扣止爪25c 扣合的扣合孔26a，於另一側端部則設有與保險絲夾25之 螺絲孔25f對合的安裝孔26b。 該保險絲按壓件26的形狀和尺寸係被設計為當與保 險絲夾25組合時，以可將插入保險絲夾25的電力保險絲 15按壓至保險絲接觸部25b之方式予以加壓。 〇 又，保險絲按壓件26之材料雖說明為薄板銅帶，但 並沒有特別使其功能為導電部的需要，故亦可使用鋼材。 其次，對於保險絲保持件24之作用進行說明。 第3圖（b)為示有於保險絲夾25插入電力保險絲15， 將保險絲按壓件26壓下且藉由螺絲或螺栓等鎖定構件27 予以鎖緊之狀態的圖。由於保險絲接觸部25b係形成V字 狀開放的直線，故於裝設有電力保檢絲15時，保險絲接觸 q部25b之内面與電力保險絲15之保險絲端子15a係於2 處接觸點接觸而成為通電接觸部。當然，雖於保險絲按壓 件26侧也會接觸，但至少必有2處之接觸點為接觸。且， 該2處為依據保險絲端子15 a之直徑與保險絲失2 5之形狀 而可計算預估之點，不會因組裝誤差等而有大幅變異。 從而，依據此保險絲保持件2 4可以獲得安定的導電 接觸。 於第4圖示有保險絲保持件之另一例。第4圖為相當 於第3圖（b)之部分的剖面圖。 9 321370 201044436 .與第3圖相同之點為’係以下 帶於長邊方向彎曲將缚板銅 -扇形擴展的方式萨屏 Y使相對向面以朝開口端側 保:成子狀而形成的保險絲夾28;以及 =[件29。以下則以相異點為中心進行說明。 絲接^:為設有保險絲夹28之連接部_之側的保險 電接觸之形狀。該保險絲接觸部娜係於比進行導 觸點更前端部側以比保險絲端子 更 ο == 率朝内側f曲’且使連接部28d相 二 朝斜上方傾斜(例如45度左右)而形成。 =險絲按屡件29係以與第3圖之情形幾乎相同 狀配合保險絲夾28而決定 的傾斜。 、〇央。卩之相和端部之接合部 〜對於形成為如第4圖所示的保險絲保持件之作用進行 次明。可知該保險絲保持件 〇 間尺寸D相比第3圖時之開〇側的端面 絲㈣件29固定於保險絲央28所需的=尺:係將保險 ==㈣3相份而配置時’由於彼此必須確保預定之絕 緣距離’故最小相間距離_尺寸+絕緣距離）。從而，若 可縮小D尺寸，則可縮短相間距離。 當電力保險絲15之直錄大時，通常尺寸縮小之效 果也會較大，故可謀求開閉器之小型化。 但是，由於第3圖之形狀的方式較易於製作，故電力 之f徑較小時錢用_之形狀的保險絲保持 件，右直徑變大則使用第4圖之形狀的保險絲保持件，分 321370 10 201044436 開使用即可。 又，於第1圖及第2圖所說明的真空開閉器僅作為例 示，而非限定於圖之構成。本發明為於保險絲安裝構造具 有特徵者，只要為附有電力保險絲的真空開閉器即可全面 適用。 如以上所述，依據本實施形態之真空開閉器的保險絲 安裝構造，保持電力保險絲之兩端部而加以固定的保險絲 保持件係具有保險絲夹’而該保險絲夹係具有固定於電路 〇 側的固定部、和從該固定部之兩端扇形擴展地上升而呈V 字狀傾斜且相對向的保險絲接觸部，電力保險絲由於係設 成至少在抵接於保險絲接觸部的2處進行導電接觸，故在 電力保險絲與保險絲夾部間之連接部中，由於至少可以使 其於預先想定的2處確實接觸，故接觸電阻之變異少，而 可獲得穩定之導電接觸，且提供高可靠性的真空開閉器。 此外，由於在保險絲炎之保險絲接觸部的一側前端部 q設有扣止爪，於另一側前端部設有連接部，且具有：一端 部係與保險絲夾之扣止爪扣合，另一端部則扣留於連接部 而將保險絲夾之兩端部繫合，且以將插入保險絲夾的電力 保險絲朝保險絲接觸部按壓的方式加以按壓的保險絲按壓 件，故可將電力保險絲保持接觸壓地確實按壓至保險絲接 觸部。 另外，由於設有保險絲夾之連接部之側的保險絲接觸 部係於比進行通電接觸的接觸點更前端部侧處向内部彎 曲，且連接部係形成為相對於固定部朝斜上方傾斜，故加 11 321370 201044436 上刖述效果可縮小相關尺 【圖式簡單說明】 使開閉器小型化。 第1圖係使用本發明第 的真空開閉器之正面圖。只& '禮之保險絲安裝構造 第2圖為第1圖之側面圖。 第3圖（a)及（b)為示有第]圓夕# a 絲保持件的圖。 圖之保險絲安裝部的保險 〇構、生發明^ 1實施形態的保險絲安裝 構1所使用的保險絲保持件之另一例的剖面圖。/ 面圖第5圖係示有習知真空開閉器之保險絲安裝構造的正 【主要元件符號說明】 1 台車 3 真空斷路器 5 可動接點 7 可動桿 9 絕緣桿 11 桿 13 可動鐵芯 15 電力保險絲 16, 17 連接導體 19 支持構件 21 絕緣障板 24 保險絲保持件 2 絕緣框體 4 固定接點 6 固定桿 8 固定側端子 10 轉動軸 12 可動側端子 14 電磁鐵 15a 保險絲端子 18 固定側主電路導體 20, 23 接觸件 22 可動側主電路導體 25,28 保險絲夾 321370 12 201044436 25a，28a固定部 25c，28c扣止爪 25e, 26b安裝孔 26, 29 保險絲按壓件 27 鎖固構件 25b, 28b保險絲接觸部 25d，28d連接部 25 f 螺絲孔 26a，29a扣合孔 ❹ 13 321370201044436 VI. Description of the invention: 'Technical field to which the invention pertains>> The present invention relates to a fuse mounting structure of a vacuum shutter provided with a power fuse. [Prior Art] A vacuum switch provided with a power fuse is known in the fifth embodiment. As shown in the figure, three rows of vacuum interrupters 32 having fixed contacts and movable contacts (none of which are not shown) are arranged side by side in the frame 31. The movable contact side of the true air circuit breaker 32 is coupled to an operating lever 35 provided on the operating shaft 34 via an insulating link 33. A movable iron core 36 is provided on the operation shaft 34, and the movable iron core 36 is attracted by the electromagnet 37 to rotate the operation shaft 34, and the operation lever 35 is driven to connect/separate the movable contact via the insulating link 33. Fixed contact. On the other hand, the fixed contact side is electrically connected to the fixed side terminal 38 fixed to the frame 31, and is connected between the fixed side terminal 38 and the main circuit conductor (not shown) disposed on the back side. Power fuse 3 9. ◎ The electric fuse 39 is inserted into the fuse holder 41 attached to the mounting metal fitting 40, and the lock plate 42 is placed from the upper portion and locked by a bolt (for example, refer to Patent Document 1). . [PRIOR ART DOCUMENT] [Patent Document 1] [Patent Document 1] 曰本实公昭62-33451 (1st, 1st) [Summary of the Invention] 4 321370 201044436 . (Problems to be solved by the invention) : In the fuse mounting structure of the conventional vacuum shutter shown in Patent Document 1, the inner shape of the fuse holder 41 is curved in accordance with the shape of the electric fuse 39. The conductive portion of the electric fuse 39 and the inner surface of the fuse holder 41 appear to be in surface contact with a wide area on the surface, but actually have a plurality of point contact or line contact, and are slightly shaped by the power fuse 39 and the fuse holder 41. The difference in size and the strength of the locking force make the contact area not fixed, and it is difficult to specify exactly which part of the contact. Therefore, depending on the situation, there may be a problem that the contact portion is displaced to cause abnormal heat generation. In addition, Patent Document 1 discloses that two sides of the power fuse have a terminal plate, and the terminal plate is screwed. Tighten to the Anshang metalware and the structure of the women's wear. Although the power fuse of the shape described above can solve the problem of the offset of the connection and the part, the power fuses that are sold in the market are mostly the power of the cylindrical terminal (cap) having the figure 5 The fuse, the fuse of the true shut-off device is also used more. (4) The penalty "(Qing tyPe). Thus, in the true "closer" of the cover-type power fuse, the above-mentioned problem is still present in order to eliminate the above The problem is the implementer, the fuse connection between the fuse holder and the power fuse, and the fuse mounting structure for opening and closing the stolen. (Means for Solving the Problem) The vacuum switch of the vacuum switch of the present invention has a built-in structure with a fixed contact and a movable contact, and has a built-in seven-circuit benefit, and has a series connection 321370 5 .201044436 : Power fuse between side main circuit conductors: electric::: fixed at both ends of the fuse to fix the power. Keep the power guaranteed, j: in the * 0 guarantee l糸 retaining parts The fuse has a fixed portion fixed to the circuit side and extends from the fixed portion toward the end of the fan shape, and is inclined in a font shape (four) to the contact portion, and the power fuse is at least in the position of the board. 4 connected to the conductive contact. ^The two places that are in contact with the fuse contact portion are the same. (Effect of the invention) The fuse mounting structure of the vacuum switch according to the present invention is fixed to both ends of the fuse, and is fixed to the circuit side. Part and from fixed;: Both ends toward: = word-shaped and opposite fuse contact fuses === (four) at least (four) connected to the fuse contact part 2 = electric contact 'so in the power fuse and fuse clip and In the connection portion, = is made to make sure that the two places are in contact with each other in advance, so that the contact material (V) can be obtained, and the vacuum switch can be obtained. [Embodiment] The first embodiment of the invention relates to a fuse mounting structure for a vacuum-opening device according to a first embodiment of the present invention. Figure i is a front view of the vacuum shutter of the lion mounting structure, which is: a part of the = face: = (fa?late) cut and the internal shape can be seen '1, ° 2 is the first 1 side view of the figure. 321370 6 .201044436 == 3rd, the true two-break circuit installed in the insulating frame of the trolley 1. . The main circuit contact of the vacuum switch is constructed. 2 The circuit breaker ac_ lnterrupter) 3. Vacuum ο The vacuum container contains a fixed contact 4 and a movable contact 5, and the fixed rod 2: ^ 疋 contact 4 is exported to the outside, movable stalk? The external is derived from the movable contact $. The front end side of the fixing rod 6 is connected to the ^ 疋 fixed to the insulating frame 2! Terminal 8; the front end side of the movable lever 7 is connected via the insulating rod 9, and the end is fixed to the rod u of the turn_1G. In addition, the movable rod? The === pullable conductor is connected to the movable body fixed to the insulating frame: 磁铁 The magnet has a movable iron core 13 and an electric known mechanism. If the electromagnet 14 attracts the movable iron # η == to rotate, and the rod U is driven in conjunction with the driving, the driving is: 4==_)9, 7 and 5, and the two contacts ο are used for the second: The power fuse 15 having a predetermined or more breakage is disposed above the fuse 3, and the fuse is a fuse that is one of the power fuses 15 in the direction in which the axis is parallel to the direction in which the fixed-side terminal δ is drawn. The terminal terminal portion is connected to the fixed-side terminal via the connection conductor 16 fixed to the insulating housing 2 . Further, the fuse terminal (5) on the other side is connected to the m (four) circuit is is via a connection conductor. The contact circuit is supported by the support member 19 fixed to the bogie 1, and the front end portion 8 = the contact member 2Q to which the main circuit conductor is connected. In addition, an insulating baffle (barrier〇21 is provided between the phases of each of the electrodes 321370 1 • 201044436 • 15: On the other hand, the movable side terminal 12 is connected to the same direction as the fixed side main circuit conductor 18 and is The movable side main circuit conductor 22 supported by the support member 19 is provided with a contact member 23 connected to the load side at the front end portion thereof. The power fuse 15 has a power of several hundred amps or more depending on the capacity of the vacuum shutter. It is very important that the electrical connection is made. Therefore, the fuse holder 24 of the solid-state power fuse 15 is composed of: a fuse 25 that is locked to the connection conductors 16 and 17 by screws, and a power fuse 15 The fuse holder 26 is inserted and fixed by pressing the fuse holder 25. The vacuum opening and closing H of the present embodiment is characterized in that the fuse holder structure is characterized in that the fuse holder 24 is described in more detail below. Ma is a diagonal view of the wire retaining member 24. The fuse retains the woven 4 fuse clip 25 so that the thin copper strip is u-shaped in the long direction: 'and the relative of the bend The face-to-face side fan 2 is formed in a V shape toward the open end side. The U-shaped bottom surface portion is formed in a plane to form a fixing portion of the connecting conductor 16 or 17 on the circuit side. The opposite portion that is fanned out at the end and that is erected in a V-shaped shape is used as a fuse (four). At the front end portion of the fuse connector 115, a portion that is bent outward is formed. The center of the 25a is formed with a mounting hole 25e, and the screw hole 25f is formed in the connection portion 321370 8 201044436 portion 25d. On the other hand, the fuse pressing member 26 slightly bends the central portion of the thin copper strip, and is provided at one end portion. A fastening hole 26a that is engaged with the fastening claw 25c of the fuse holder 25 is provided, and a mounting hole 26b that is engaged with the screw hole 25f of the fuse holder 25 is provided at the other end. The shape of the fuse pressing member 26 is The size is designed to be pressurized in such a manner as to press the power fuse 15 inserted into the fuse clip 25 to the fuse contact portion 25b when combined with the fuse clip 25. Further, the material of the fuse press member 26 is described as a thin plate copper. Belt, but it does not make it special Steel can also be used for the conductive portion. Next, the action of the fuse holder 24 will be described. Fig. 3(b) shows the insertion of the power fuse 15 in the fuse holder 25, and the fuse pressing member 26 is pressed down. The figure is locked by a locking member 27 such as a screw or a bolt. Since the fuse contact portion 25b is formed in a V-shaped open straight line, when the power retaining wire 15 is mounted, the fuse contacts the q portion 25b. The inner surface of the fuse terminal 15a of the power fuse 15 is in contact with the contact point at two points to be an energized contact portion. Of course, the fuse holder 26 is also in contact with the fuse holder 26, but at least two contact points must be in contact. Further, the two points are calculated based on the diameter of the fuse terminal 15a and the shape of the fuse, and are not subject to large variations due to assembly errors and the like. Thereby, a stable conductive contact can be obtained in accordance with this fuse holder 24. Another example of a fuse holder is shown in Fig. 4. Fig. 4 is a cross-sectional view corresponding to the portion of Fig. 3(b). 9 321370 201044436 . The same point as in Fig. 3 is the way in which the following belt is bent in the longitudinal direction to expand the binding plate copper-fan shape. Sa Ping Y makes the opposite side face toward the open end side: a fuse formed in a sub-shape Clip 28; and = [piece 29. The following is a description centering on the difference. Wire connection: is the shape of the fuse electrical contact on the side of the connection portion _ where the fuse clip 28 is provided. The fuse contact portion is formed so that the front end portion side of the lead contact portion is bent more toward the inner side than the fuse terminal, and the connecting portion 28d is inclined obliquely upward (for example, about 45 degrees). = The risk is determined by the matching of the fuse clip 28 in almost the same manner as in the case of Fig. 3. , Central. The joint between the 卩 phase and the end ～ is performed for the action of the fuse holder formed as shown in Fig. 4. It can be seen that the cross-sectional dimension D of the fuse holder is smaller than that required for the end face wire (four) member 29 of the opening side of the third figure to be fixed to the fuse center 28: when the fuse is == (four) three-phase parts are arranged, It is necessary to ensure a predetermined insulation distance 'so the minimum phase distance _ size + insulation distance). Therefore, if the D size can be reduced, the phase distance can be shortened. When the direct recording of the electric fuse 15 is large, the effect of downsizing is usually large, so that the size of the shutter can be reduced. However, since the shape of the shape of Fig. 3 is easier to manufacture, the fuse holder having the shape of the electric power has a smaller diameter, and the fuse holder of the shape of Fig. 4 is used for the right diameter. 10 201044436 Open and use. Further, the vacuum shutters described in Figs. 1 and 2 are merely illustrative and are not limited to the configuration of the drawings. The present invention is characterized by a fuse mounting structure, and can be fully applied as long as it is a vacuum shutter with a power fuse. As described above, according to the fuse mounting structure of the vacuum switch of the present embodiment, the fuse holder that holds the both ends of the power fuse and is fixed has a fuse clip, and the fuse clip has a fixing fixed to the side of the circuit. And a fuse contact portion that is fan-shaped and inclined from the both ends of the fixed portion and that is inclined in a V shape, and the power fuse is electrically contacted at least at two places that abut against the fuse contact portion. In the connection portion between the power fuse and the fuse clip portion, since at least two places can be surely contacted at predetermined places, the variation of the contact resistance is small, and stable conductive contact can be obtained, and high reliability vacuum opening and closing is provided. Device. Further, since the front end portion q of the fuse contact portion of the fuse is provided with a locking claw, the other end portion is provided with a connecting portion, and the one end portion is fastened to the fastening claw of the fuse clip, and the other is The one end portion is held by the connection portion, and the two ends of the fuse clip are coupled to each other, and the power fuse that inserts the fuse clip is pressed against the fuse contact portion, so that the power fuse can be kept in contact with the ground. It is indeed pressed to the fuse contact. Further, since the fuse contact portion on the side where the connection portion of the fuse clip is provided is bent toward the inside from the contact point closer to the energization contact, and the connection portion is formed to be inclined obliquely upward with respect to the fixed portion, Add 11 321370 201044436 The above description can be reduced to reduce the relevant ruler [Simple description of the drawing] Make the shutter compact. Fig. 1 is a front view showing the use of the vacuum shutter of the present invention. Only & 'Rit fuse mounting structure Fig. 2 is a side view of Fig. 1. Fig. 3 (a) and (b) are diagrams showing the symmetry of the present invention. Fig. 1 is a cross-sectional view showing another example of the fuse holder used in the fuse mounting structure of the embodiment. / Fig. 5 is a diagram showing the fuse mounting structure of a conventional vacuum switch. [Main component symbol description] 1 Pallet 3 Vacuum circuit breaker 5 Movable contact point 7 Movable rod 9 Insulated rod 11 Rod 13 Movable iron core 15 Electricity Fuse 16, 17 Connecting conductor 19 Supporting member 21 Insulating baffle 24 Fuse holder 2 Insulating frame 4 Fixed contact 6 Fixing rod 8 Fixed side terminal 10 Rotary shaft 12 Movable side terminal 14 Electromagnet 15a Fuse terminal 18 Fixed side main circuit Conductor 20, 23 Contact 22 Movable side main circuit conductor 25, 28 Fuse clip 321370 12 201044436 25a, 28a Fixing portion 25c, 28c Buckle claw 25e, 26b Mounting hole 26, 29 Fuse pressing member 27 Locking member 25b, 28b Fuse Contact portion 25d, 28d connecting portion 25f screw hole 26a, 29a snap hole 13 321370