經濟部智慧財產局員工消費合作社印製 ^ 60887 A7 _____ B7 五、發明說明（1 ) 【發明所屬之技術領域】 本發明係有關薄型之熱熔斷器用之前導體及使用其前 導體之熱熔斷器。 .【習知技術】 作爲熱熔斷器，雖然一般廣汎地使用稱爲軸型之圓筒 狀者，但是最近隨著機械之小型化，薄型化，例如普遍地 使用薄型之熱熔斷器。 使用於這種熱熔斷器之前導體也形成爲帶狀。 作爲此前導體已經提案有日本專利特開平 1 1 — 40026號所揭示者。第9圖係表示其前導體 1 /之斜視圖。 此前導體1 <係在由鎳所形成之前導體1 /先端部表 面裝設銅導體所構成。 【發明所欲解決之問題】 然而，具有使用銅導體2 <者由於經時變化導致其表 面氧化，對於可熔合金之溶接變成困難之問題。 本發明係鑑於上述情形所提案者，其目的係提供一種 減輕由於氧化對於可熔合金之熔接影響之熱熔斷器用前導 體。 又，並且使用此前導體裝配熱熔斷器時，提供一種改 善裝配，並且提升裝配後之前導體之抗拉強度之熱熔斷器 本紙張尺度適用中國國家標準（CNS>A4規格（210 X 297公釐） I- Ϊ1—-------裝·-------訂線 i (請先閱讀背面之注意事#寫本頁). -4- 4 e〇88 7 a? 一 B7 五、發明說明（2 ) 【解決問題之手段】 (請先閱讀背面之注意事填寫本頁) 本發明係於薄型之熱熔斷器用前導體，其特徵爲；在 細長薄板狀之前導體1，1 0 0之先端部表面，裝設不容 易受到由於氧化對於可熔合金之熔接影響之金屬2 » 爲了達成上述目的，採用了下述構成； 又，上述前導體1，10◦，與不容易受到由於氧化 對於可熔合金之熔接影響之金屬2之組合，係 前導體1，1 0 0係銅或銅合金，可熔合金溶接用之 金屬2係由錫或銀所成， 或， 前導體1 >100係鐵或鐵合金，可熔合金熔接用之 金屬2係由錫或銀所成， _ 或， 前導體1，100係鋁或鋁合金，可熔合金熔接用之 金屬2係由錫或銀所成， 經濟部智慧財產局員工消費合作社印製 又，在鎳或鎳合金所形成之細長薄板狀之前導體1先 端部裝設一對可熔合金熔接用之金屬2之一對前導體1間 熔接可熔合金，並且，此可熔合金1 0係構成爲裝設於由 絕緣基板4與蓋子所形成之薄型絕緣體內。 更且，本發明之熱熔斷器，係在構成薄形絕緣體之絕 緣基板4上面，經由間隔裝設在先端部具有可熔合金熔接 用金屬2之一對前導體1，在其前導體間裝設上述可熔合 金1 0’在其上裝設蓋子5所形成之薄形熱熔斷器， 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） A7 4 6088 7 B7 五、發明說明（3) 其特徵爲； (請先閲讀背面之注意事項寫本頁) 在其上述絕緣基板4上面沿著其長度方向從一端側到 他端側，形成配設有上述前導體1，可熔合金1 0之帶狀 凹部6， 在此凹部6兩端分別形成前導體定位兼固定用之突部 7， 在上述前導體1形成有可與上述突部7嵌合之安裝用 孔3。 【發明之實施形態】 茲依據圖面說明本發明如下。 【實施例1】 * 第1 ( a ) ，（ b )圖及第2圖係表示本發明之一實 施例。其中第1 ( a )圖係有關本發明一實施例之前導體 之平面圖，第1 ( b )圖係側面圖，第2圖係表示斜視圖 〇 經濟部智慧財產局員工消費合作社印製 於這些圖，1爲薄且成細長狀之前導體，在此前導體 1之先端部表面，即使在可熔合金熔接時氧化也不容易受 到氧化影響之金屬或銅相較裝設有由於經時變化而表面不 容易受到氧化之可熔合金熔接用之金屬2。在此先端部表 面之薄金屬2將變成對於可熔合金之熔接部分。3係視其 需要所形成之安裝孔，較設可熔合金熔接用金屬2之先端 部形成於稍外側。 ' 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -6- 46〇δδ7 A7 B7 五、發明說明（4 ) 裝設於前導體1與其先端部表面之可熔合金熔接用之 金屬2之組合，係例如如下。又，前導體1係依安裝前導 體1之熔斷器處所之材質’首先，視其需要適當選擇實施 鍚（Sn)，錄（Ni)，銀（Ag)等之電鍍。 前導體 a .鎳（N i )或合金等鎳合金 可熔合金熔接用金屬 錫（S η)或銀（A g) b .銅（C u)或銅合金 錫（S η)或銀（A g) I.---*：---------裝--- <請先閱讀背面之注意事項ri*··'寫本頁) .鐵（F e )或鐵合金 錫（S η )或銀（A g) ij· 錫（S η )或銀（A g ) d ·錦（A 1 )或合金等銀合金 於上述，金屬2爲錫時，因錫爲與可熔合金相同元素 ，所以，即使氧化也在熔接時也會連同氧化物熔解，因此 ，不容易受到氧化之影響，可快速地熔接。Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs ^ 60887 A7 _____ B7 V. Description of the Invention (1) [Technical Field to which the Invention belongs] The present invention relates to a thin type of thermal fuse with a front conductor and a thermal fuse using the front conductor. [Known Technology] Although a cylindrical type called a shaft type is generally widely used as a thermal fuse, recently, with the miniaturization and thinning of a machine, for example, a thin thermal fuse is generally used. The conductor is also formed into a strip shape before being used in such a thermal fuse. As a previous conductor, there has been a proposal disclosed in Japanese Patent Laid-Open No. 11-40026. Fig. 9 is a perspective view showing the front conductor 1 /. Previously, the conductor 1 < was made of a copper conductor on the surface of the conductor 1 / tip end before being formed of nickel. [Problems to be Solved by the Invention] However, there is a problem that the surface of the copper conductor 2 < is oxidized due to a change with time, and the fusion of the fusible alloy becomes difficult. The present invention has been proposed in view of the above circumstances, and an object thereof is to provide a precursor for a thermal fuse which reduces the influence of oxidation on the welding of a fusible alloy. In addition, when using the previous conductor to assemble the thermal fuse, it provides a thermal fuse that improves the assembly and enhances the tensile strength of the previous conductor after assembly. This paper applies the Chinese national standard (CNS > A4 specification (210 X 297 mm)). I- Ϊ1 —------- installation · ------- Thread i (Please read the note on the back #write this page first). -4- 4 e〇88 7 a? One B7 five 2. Description of the invention (2) [Solution to the problem] (Please read the precautions on the back and fill in this page) The present invention is a thin conductor for the front of a thermal fuse. The surface of the leading end of 0 is installed with a metal that is not easily affected by the welding of the fusible alloy due to oxidation. 2 »In order to achieve the above purpose, the following structure is adopted; In addition, the front conductors 1 and 10 are not easily affected by The combination of metal 2 affected by the oxidation on the fusion of the fusible alloy, is the front conductor 1, 100 is copper or copper alloy, and the metal 2 for fusible alloy fusion is made of tin or silver, or, the front conductor 1 & gt 100 series of iron or iron alloy, metal for fusible alloy welding 2 series of tin or Made of _ or, the front conductor 1,100 is aluminum or aluminum alloy, and the metal 2 for fusible alloy welding is made of tin or silver. It is printed by the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, and is made of nickel or nickel alloy. A slender thin plate-shaped front conductor 1 is formed with a pair of fusible alloy welding metals 2 at its tip, and a fusible alloy is fused between a pair of front conductors 1, and the fusible alloy 10 is configured to be installed in A thin insulator formed by the insulating substrate 4 and the cover. Furthermore, the thermal fuse of the present invention is provided on the insulating substrate 4 constituting the thin insulator, and is provided at a tip end with a fusible alloy welding metal 2 through a gap. A pair of front conductors 1 with a thin thermal fuse formed by the above-mentioned fusible alloy 10 'between the front conductors and a cover 5 installed thereon. This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 mm) A7 4 6088 7 B7 V. Description of the invention (3) Its characteristics are: (Please read the precautions on the back to write this page) On the above-mentioned insulating substrate 4 along its length from one end side to the other End side, forming the above-mentioned leader 1. Band-shaped recesses 6 of the fusible alloy 10, protrusions 7 for positioning and fixing the front conductor are formed at both ends of the recess 6, respectively, and the front conductor 1 is formed with a fitting for fitting with the protrusions 7 Hole 3. [Embodiments of the invention] The present invention will be described below with reference to the drawings. [Embodiment 1] * The first (a), (b) and second drawings show an embodiment of the present invention. Among them, the first (a) The diagram is a plan view of a conductor before an embodiment of the present invention. The first (b) diagram is a side view, and the second diagram is an oblique view. Thin and slender pre-conductor. On the surface of the front end of the previous conductor 1, the metal or copper that is less susceptible to oxidation even when oxidized during fusion of the alloy is installed. Compared with the installation, the surface is less susceptible to oxidation due to changes over time Metal 2 for welding of fusible alloys. The thin metal 2 on the surface of the tip portion will become a welded portion to the fusible alloy. 3 is a mounting hole formed as needed, and is formed slightly outside the tip end of the metal 2 for fusible alloy welding. '' This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -6- 46〇δδ7 A7 B7 V. Description of the invention (4) Fusible alloy welding on the surface of the front conductor 1 and its front end The combination of the metals 2 used is, for example, as follows. In addition, the front conductor 1 is formed according to the material of the fuse space where the front conductor 1 is installed. First, as required, electroplating of (Sn), (Ni), silver (Ag), etc. is appropriately selected and performed. Front conductor a. Metal tin (S η) or silver (A g) for welding of nickel alloy fusible alloys such as nickel (N i) or alloy b. Copper (C u) or copper alloy tin (S η) or silver (A g) I .--- *: --------- install --- < Please read the precautions on the back ri * ·· 'write this page). Iron (F e) or iron alloy tin ( Silver alloys such as S η) or silver (A g) ij · tin (S η) or silver (A g) d · brocade (A 1) or alloys are as described above. When metal 2 is tin, tin is a fusible alloy. The same elements, so that even if oxidation is also fused together with the oxide during welding, it is not easily affected by oxidation and can be quickly welded.
I 又，銀爲較以往之銅相較不容易受到氧化之影響。 在前導體1裝設金屬2時，例如，熔融鍍，電鍍，真 空澱積，軋輥等之手段即可。 第3 (a)〜（d)係表示組裝上述前導體1之熱熔 斷器用絕緣基板4。 此絕緣基板4係係由陶瓷，絕緣性樹脂成形品等所形 成，於第5圖連同後述之蓋5構成薄形絕緣體。6係沿著 度適用中國國家標準（CNS)A4規格（210 X 297公釐〉 線 經濟部智慧財產局員工消費合作社印製 A7 B7 460887 五、發明說明（5 ) 絕緣基板4長度方向從其一端側6 a到他端側6 b形成爲 帶狀化之前導體1及可熔合金配設用之凹部。在此凹部6 兩端部分別形成有成短柱狀之前導體定位兼用固定用之突 部7。又，在相當於凹部6中央部兩側之上下例如形成有 成爲長方形之突部8。因此’凹部6中央部之縱筒寬度係 由在上下分別所形成之矩形狀橫長之突部8變成狹隘寬度 。9係沿著凹部6上邊側及下邊側分別形成之蓋安裝用突 部。此突部9係從絕緣基板4 一端側6 a之梢內側到他端 側6 b前面沿著上邊，下邊長向形成。 第4圖係表示在上述絕緣基板4之凹部6經由間隔安 裝一對前導體1與如跨接安裝在設於凹部6之狹隘寬度之 低熔點可熔合金1 0之狀態。 成帶狀之前導體1先端部分读成爲與如收納於凹部6 大約相同寬度尺寸，在突部7嵌入有可嵌合之安裝用孔3 。因此，將孔3對準於絕緣基板4之突部7，若嵌合其孔 3時就可容易在凹部6既定位置定位固定前導體1。按， 前導體1先端係被定位抵接於突部8端部。又，在分別設 於絕緣基板4上面之左右一對前導體1間設有低熔點可熔 合金1 0，而塗佈松脂（rosin )系之熔接劑。此時，雖然 由焊錫熔接前導體1與可熔合金1 0，但是從錫所成之可 熔合金熔接用金屬2爲因焊錫熱而快速地熔解並且可確實 地加以連接。 第5 (a)〜（d)係表示覆蓋設有前導體1等之絕 緣基板4上面之蓋5。 .— 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ΙΓ---:---------裝----1---訂---1 — 1_線！ (請先閱讀背面之注意事寫本頁) .( 經濟部智慧財產局員工消費合作社印製 -8- 46088 7 A7 B7 五、發明說明（6) 此蓋5係由陶瓷，絕緣性樹脂成形品等所形成，其內 面爲被形成約略對應於覆蓋絕緣基板4上面之凹凸形狀。 (請先閱讀背面之注意事t填寫本頁) 亦即，蓋5之內面外周部係成緣狀變成厚壁，在其厚 壁1 1與絕緣基板4塡料（padding )之突部9之嵌合用之 溝1 2形成爲矩形框狀。又，在溝1 2內側形成有橫長矩 形之凹部1 3，從此凹部1 3兩側部到上述溝1 2形成有 可與絕緣基板4之突部7嵌合之凹部1 3 a。 裝配時，如第6圖所示，在絕緣基板4上面安裝一對 前導體1等，與第4圖所示之可熔合金1 0連接，從上邊 覆蓋與絕緣基板4同形狀之蓋5即可。此時，在蓋5之溝 1 2內注入環氧樹脂等密封劑。在凹部1 3 a內收納於突 部7之溝1 2因在蓋5內側形成矩形狀，所以可使多餘之 密封劑逃逸，可防止其液用之滴垂； 又，因絕緣基板4上面與蓋5內面之各凹凸部形成爲 約略接觸，所以，接觸面積大，可確保充分強度。 又，因前導體1之孔3係與絕緣基板4之突部7嵌合 *所以，具有充分抗拉強度，使用時不會彎曲，拉動或脫 落。 ' 經濟部智慧財產局員工消費合作社印製 _ 第7圖係如上述裝配後之熱熔斷器之平面圖。於圖爲 了可看淸楚內部構造截開表示蓋5 —部。按，在可熔合金 1 0上爲了防止氧化，淸洗，濕潤性等目的塗佈有松脂系 之熔接劑1 4。 按，於上述實施例，也可以爲無突部7型式之絕緣基 板4。此時，就不必形成安裝用1 3。I. Silver is less susceptible to oxidation than conventional copper phases. When the front conductor 1 is provided with the metal 2, for example, means such as hot-dip plating, electroplating, vacuum deposition, and rolls may be used. The third (a) to (d) show the insulating substrate 4 for a thermal fuse in which the front conductor 1 is assembled. This insulating substrate 4 is formed of ceramic, an insulating resin molded product, and the like, and a thin insulator is formed in Fig. 5 together with a cover 5 described later. 6 series applies China National Standard (CNS) A4 specifications (210 X 297 mm) printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 460887 V. Description of the invention (5) Insulating substrate 4 lengthwise from one end Side 6 a to other end side 6 b are formed as recesses for the conductor 1 and the fusible alloy before the banding. The recesses 6 are formed with protrusions for positioning and fixing the conductor before the short pillars at both ends. 7. Further, rectangular protrusions 8 are formed above and below the sides corresponding to the central portion of the recessed portion 6. Therefore, the width of the vertical tube of the central portion of the recessed portion 6 is a rectangular-shaped horizontally long protruding portion formed on the upper and lower sides. 8 becomes a narrow width. 9 is a cover mounting protrusion formed along the upper side and the lower side of the recessed portion 6, respectively. This protrusion 9 extends from the inner side of the end of the one end side 6 a of the insulating substrate 4 to the front side of the other end side 6 b. The upper side and the lower side are formed lengthwise. Fig. 4 shows a pair of front conductors 1 installed in the recessed portion 6 of the above-mentioned insulating substrate 4 via a gap, and a low melting point fusible alloy 10 of a narrow width provided in the recessed portion 6 The state of the conductor 1 before the band It reads that it is approximately the same width as if it was accommodated in the recessed portion 6, and a fitable mounting hole 3 is embedded in the protruding portion 7. Therefore, the hole 3 is aligned with the protruding portion 7 of the insulating substrate 4, and if the hole 3 is fitted At this time, it is easy to position and fix the front conductor 1 at the predetermined position of the recess 6. The front end of the front conductor 1 is positioned and abutted against the end of the protrusion 8. The left and right pair of front conductors 1 provided on the insulating substrate 4 respectively A low-melting fusible alloy 10 is provided in between, and a rosin-based welding agent is applied. At this time, although the conductor 1 and the fusible alloy 10 are welded before soldering, the fusible alloy formed from tin is fused. The metal 2 is quickly melted by the heat of the solder and can be reliably connected. Sections 5 (a) to (d) indicate the cover 5 covering the upper surface of the insulating substrate 4 provided with the front conductor 1 and the like.-This paper size Applicable to China National Standard (CNS) A4 specification (210 X 297 mm) ΙΓ --------------- installation ---- 1 --- order --- 1 — 1_ line! ( Please read the notes on the back first to write this page). (Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-8- 46088 7 A7 B7 V. Description of the invention (6) This cover 5 is made of ceramic, The inner surface of the edge-shaped resin molded product is formed to have a concave-convex shape that approximately corresponds to the upper surface of the insulating substrate 4. (Please read the precautions on the back first and fill in this page) That is, the inner periphery of the cover 5 It is formed into a marginal shape and a thick wall, and a groove 12 for fitting the thick wall 11 and the protruding portion 9 of the padding 9 of the insulating substrate 4 is formed into a rectangular frame shape. A horizontal line is formed inside the groove 12. A long rectangular recessed portion 13 is formed from both sides of the recessed portion 13 to the above-mentioned groove 12, and a recessed portion 1 a is fitted into the protruding portion 7 of the insulating substrate 4. During assembly, as shown in FIG. 6, a pair of front conductors 1 and the like are mounted on the insulating substrate 4 and connected to the fusible alloy 10 shown in FIG. 4, and a cover 5 having the same shape as the insulating substrate 4 is covered from above. can. At this time, a sealant such as an epoxy resin is injected into the groove 12 of the cover 5. The groove 12 stored in the protrusion 7 in the recess 1 a is formed in a rectangular shape on the inside of the cover 5, so that the excess sealant can escape and the dripping of the liquid can be prevented; The concave-convex portions on the inner surface of the cover 5 are formed to be approximately in contact with each other, so that the contact area is large and sufficient strength can be secured. In addition, since the hole 3 of the front conductor 1 is fitted into the protruding portion 7 of the insulating substrate 4, it has sufficient tensile strength and does not bend, pull, or come off during use. '' Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs _ Figure 7 is a plan view of the thermal fuse after assembly as described above. In the picture, the internal structure of the Chu can be seen and the cover 5 is shown. In order to prevent oxidation, washing, wettability, etc. on the fusible alloy 10, a rosin-based welding agent 14 is applied. According to the above-mentioned embodiment, it may also be an insulating substrate 4 of the type having no protrusion 7. In this case, it is not necessary to form a mounting 1 3.
本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐) "T A7 088 7 ____B7_;_ 五、發明說明（7 ) 又，絕緣基板4或蓋5並非只限定於圖示例，當然也 可以爲其他適當之彤狀。 第8圖係表示本發明之前導體1 0 0之其他形狀例。 於此例，在前導體1 0 0先端部附近形成有對於絕緣基板 (未圖示）所安裝之定位固定用中間變細部1 0 1 ，並且 ，在與可熔合金熔接之先端部表面設有可熔合金熔接用金 屬2。又，前導體1 0 0相反側端部視其需要形成適當形 狀之安裝部1 0 2，並且視其需要形成安裝用之孔1 〇 3 【發明效果】 又，在前導體形成安裝用孔，若形成絕緣基板與其嵌 合之定位固定用之突部時，除了具有可快速地進行前導體 對於可熔合金熔接之優點之外，安裝前導體特之熱熔斷器 之裝配性也被改善，又，裝配後，前導體之抗拉強度，也 因嵌合有前導體之安裝孔凸部，將可更加提升。 圖式之簡單說明 第1圖，（a)係前導體之一實施例之平面圖。（b )係表示其側面圖。 第2圖係表示該實施例之斜視圖。 第3圖係組裝本發明一實施例之前導體之絕緣基板之 一例，（a)係平面圖，（b)係（a)圖中之A — A線 縱剖面圖，（c )係右側面圖，（d )係正面圖。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ----..---1----'1 裝—--訂---------線 <請先閱讀背面之注意事揉寫本頁) 經濟部智慧財產局員工消費合作社印製 -10- d 60 88 7 A7 B7 五、發明說明（8) 第4圖係表示對於絕緣基板組裝前導體之平面圖。 請先閱讀背面之注意事寫本頁) 第5圖.（a)係安裝於絕緣基板之蓋平面圖，（b) 係（a )中之B — B線之剖面圖，（c)係右側面圖，（ d )係表示正面圖。 ~ 第6圖係表示熱熔斷器之裝配說明圖》 第7圖係表示熱熔斷器完成品之部分截開平面圖》 第8圖係表示本發明之其他實施例之平面圖 經濟部智慧財產局員工消費合作社印製 第 9 圖係表示先前例1 號之說明】 1 前導體， 2 可熔合金熔接用之金屬， 3 安裝用孔， 4 絕緣基板， ' 5 蓋， 6 凹部， 6 a 一側端， 6 b 他側端， 7 前導體定位兼固定用突部 8 突部， 1 0 可熔合金， 1 1 塡料部， 1 2 溝， 1 3 凹部， 1 4 熔接劑。 ~ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -11 -This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) " T A7 088 7 ____ B7 _; _ 5. Description of the invention (7) In addition, the insulating substrate 4 or cover 5 is not limited to the examples shown in the drawings Of course, it can also be other suitable ones. FIG. 8 shows another shape example of the conductor 100 before the present invention. In this example, an intermediate thinned portion 1 0 1 for positioning and fixing, which is mounted on an insulating substrate (not shown), is formed near the leading end of the leading conductor 100, and is provided on the surface of the leading end portion fused with the fusible alloy. Fusible alloy welding metal 2. In addition, the opposite end portion of the front conductor 100 is formed with a mounting portion 102 of an appropriate shape as needed, and a mounting hole 1 is formed as necessary. [Inventive Effect] Furthermore, a mounting hole is formed in the front conductor. If the protrusions for positioning and fixing the insulating substrate and the fitting are formed, in addition to the advantage that the front conductor can be quickly welded to the fusible alloy, the assemblability of the thermal fuse special to the front conductor is also improved. After assembly, the tensile strength of the front conductor will also be improved because the mounting hole projections of the front conductor are fitted. Brief Description of the Drawings Figure 1, (a) is a plan view of one embodiment of a front conductor. (B) is a side view thereof. Fig. 2 is a perspective view showing the embodiment. Fig. 3 is an example of an insulating substrate of a conductor before assembling an embodiment of the present invention, (a) is a plan view, (b) is a vertical sectional view taken along line A-A in (a), and (c) is a right side view, (D) is a front view. This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) ----..--- 1 ---- '1 Packing ------ Order --------- Line < Please read the notes on the back first and write this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -10- d 60 88 7 A7 B7 V. Description of the invention (8) Figure 4 shows the assembly of the insulation substrate before A plan view of a conductor. Please read the notes on the back first and write this page) Figure 5. (a) is a plan view of the cover installed on the insulating substrate, (b) is a cross-sectional view of line B-B in (a), and (c) is the right side Figure, (d) is a front view. ~ Figure 6 shows the assembly instructions of the thermal fuse. Figure 7 is a partially cut-away plan view of the finished thermal fuse. Figure 8 is a plan view showing another embodiment of the present invention. The 9th figure printed by the cooperative shows the previous example No. 1] 1 front conductor, 2 metal for fusible alloy welding, 3 mounting hole, 4 insulating substrate, '5 cover, 6 recess, 6 a side end, 6 b other side, 7 front conductor positioning and fixing protrusion 8 protrusion, 10 fusible alloy, 1 1 die material, 1 2 groove, 1 3 recess, 1 4 welding agent. ~ This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) -11-