541558 A7 B7 五、發明説明（）1 【發明所屬之技術領域】 (請先閱讀背面之注意事項再填寫本頁) 本發明係關於對以自動斷路器、漏電斷路器等的配線 用斷路器爲對象的電路斷路器的電弧氣體排出口之防塵構 造。 【先行技術】 首先，以前述的漏電斷路器爲例’將以往的電路斷路 器及其防塵構造顯示於第4圖。在於圖中，1是由下部盒 1 a、蓋1 b所構成的樹脂成形品之斷路器盒；2是兼作 爲電源側端子之固定接觸子；3是可動接觸子；4是開關 機構；5是開關操作把手；6是過電流斷開裝置；7是零 相變流器；8是負荷側端子；9是卡匣式地內置於斷路器 盒1的內部之消弧室。將連通於消弧室9的電弧排出口開 口於斷路器盒1的外壁面（電源側端子的上部側），且裝 著防麈用遮蔽板1 0來覆蓋此電弧氣體排出口的開口端面 0 經濟部智慧財產局員工消費合作社印製 此遮蔽板1 0是用來防止在電路斷路器之使用狀態（ 一般，電路斷路器是將電源側端子作成上方而安裝成縱向 姿勢）下，通過前述電弧氣體排出口，麈埃等由周圍入侵 到盒內部；以耐熱·不可燃性的纖維薄板製作’在電路斷 路器的電流斷路時，受到產生於消弧室內的氣體壓力的遮 蔽板本身變形而打開電弧氣體排出口，使電弧氣體排出到 外部。 在此，說明用於第4圖的電路斷路器的以往之遮蔽板 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇X297公釐） -4 - 541558 A7 _______B7 五、發明説明（> 、及其安裝構造。即，以往的遮蔽板1 0是如第5 ( a ) 〜（c )圖所示，對以從薄板的左右兩側緣、及下緣朝背 後突出的方向將耳部形成彎折的形狀而安裝於電路斷路器 ，將其搭配於第6 ( a ) 、（ b )圖所示的消弧室9的單 元框9 a的前面壁（框的前面壁是形成格子構造使電弧氣 體可通過），並且，由上方與消弧室9一同插入到斷路器 盒1的下部盒1 a中，在此位置將兩側的耳部1 〇 a輕夾 於單元框9 a與斷路器盒1的內壁面之間，而將下端的耳 部9 a在框9 a與固定接觸子2之間壓入，維持於堵塞位 置。再者，在於第6圖，9 b是架設於單元框9 a上的消 弧聞極。 在上述結構，平時，遮蔽板1 〇是堵塞連通於消弧室 的電弧氣體排出口，防止塵埃由外部入侵。另一方面，當 電路斷路器的電流斷路時，受到產生於消弧是內的電弧氣 體的內壓之遮蔽板1 0的耳部1 0 a的挾持狀態分離，遮 蔽板朝外側打開，將電弧氣體排出外部。 【發明所欲解決之課題】 然而，在前述的以往的遮蔽板1 0及其安裝構造，有 下述的困難點。 即，因需要進行在遮蔽板本身形成插入支承用的耳部 1 ◦ a 、1 〇 b之彎折加工，故遮蔽板的製作費用變高。 又，當安裝於電路斷路器時，因將遮蔽板1 0搭配於消弧 室9的單元框9 a ，並且維持此狀態地插入到斷路器盒1 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） (請先閲讀背面之注意事項再填寫本頁) •裝· 訂 經濟部智慧財產局員工消費合作社印製 -5- 54l558 Α7 —_Β7541558 A7 B7 V. Description of the invention (1) [Technical field to which the invention belongs] (Please read the precautions on the back before filling out this page) The present invention relates to circuit breakers for wiring with automatic circuit breakers, earth leakage circuit breakers, etc. The dust-proof structure of the arc gas exhaust port of the target circuit breaker. [Prior art] First, a conventional circuit breaker and its dust-proof structure are shown in Fig. 4 using the above-mentioned leakage circuit breaker as an example. In the figure, 1 is a circuit breaker box of a resin molded product composed of a lower box 1 a and a cover 1 b; 2 is a fixed contactor that also serves as a power-side terminal; 3 is a movable contactor; 4 is a switching mechanism; 5 It is a switch operation handle; 6 is an over-current disconnecting device; 7 is a zero-phase converter; 8 is a load-side terminal; 9 is an arc-extinguishing chamber built into the circuit breaker box 1 in a cassette type. The arc discharge port communicating with the arc suppression chamber 9 is opened to the outer wall surface of the circuit breaker box 1 (the upper side of the power supply-side terminal), and a shield plate 10 for preventing scorch is installed to cover the opening end surface of the arc gas discharge port. The shield 10 is printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs to prevent the circuit breaker from passing through the arc in the use state of the circuit breaker (generally, the circuit breaker is installed with the power-side terminal in an upright position). Gas exhaust ports, angstroms, etc. invade the inside of the box from the surroundings; made of heat-resistant and non-flammable fiber sheet The arc gas discharge port discharges the arc gas to the outside. Here, the conventional shielding plate used for the circuit breaker of FIG. 4 will be described. The paper size of this paper applies the Chinese National Standard (CNS) A4 specification (21 × 297 mm) -4-541558 A7 _______B7 V. Description of the invention (> And its mounting structure. That is, as shown in Figs. 5 (a) to (c), the conventional shielding plate 10 has the ears protruding from the left and right side edges and the lower edge of the thin plate toward the rear. It is installed in a circuit breaker in a bent shape, and it is matched with the front wall of the unit frame 9 a of the arc extinguishing chamber 9 shown in FIGS. 6 (a) and (b) (the front wall of the frame has a lattice structure) So that the arc gas can pass through), and inserted into the lower box 1 a of the circuit breaker box 1 together with the arc extinguishing chamber 9 from above, and at this position, the ears 10 a on both sides are lightly clamped between the unit frame 9 a and Between the inner wall surface of the circuit breaker box 1, the lower ear part 9a is pressed between the frame 9a and the fixed contact 2 to maintain the blocking position. Furthermore, in FIG. 6, 9b is installed on the The arc-extinguishing electrode on the unit frame 9 a. In the above-mentioned structure, the shield plate 10 is usually an arc gas that blocks and communicates with the arc-extinguishing chamber. The exhaust port prevents dust from invading from the outside. On the other hand, when the current of the circuit breaker is interrupted, the ears 10 a of the shielding plate 10 are separated by the internal pressure of the arc gas generated by the arc suppression inside. The shielding plate is opened to the outside, and the arc gas is discharged to the outside. [Problems to be Solved by the Invention] However, the conventional shielding plate 10 described above and its mounting structure have the following difficulties. The shielding plate itself is formed by bending the ears 1 ◦ a and 1 〇b for supporting. Therefore, the manufacturing cost of the shielding plate becomes high. When the shielding plate is installed in a circuit breaker, the shielding plate 10 is matched with the The unit box 9 a of the arc chamber 9 is inserted into the circuit breaker box 1 while maintaining this state. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) (Please read the precautions on the back before filling this page. ) • Binding · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -5- 54l558 Α7 —_Β7
五、發明説明（）B 中，故不易對應組裝機器人等之自動組裝方式，組裝遮蔽 板的動作必須依靠人手作業。並且，在安裝遮蔽板1 Q後 ’當未組裝斷路器盒1的蓋1 b而組裝中斷路器盒1傾倒 時’則遮蔽板會與消弧室一同脫落。 本發明是有鑒於上述的問題點而成之發明，其目的在 於解決前述課題，提供：能以簡單的構造且不須依靠人手 作業容易地對應自動組裝般地改良遮蔽板、及其安裝構造 之電路斷路器之防塵構造。 【發明所欲解決之課題】 爲了達到上述目的，若根據本發明的話，在斷路器盒 的端面，形成呈開口狀的連通於該盒內部的消弧室的電弧 氣體排出口，並且將防塵用遮蔽板安裝於斷路器盒，用以 覆蓋前述電弧氣體排出口的出口面之電路斷路器之防塵構 造，其特徵爲··以具有撓曲性的平坦薄板形成前述遮蔽板 ’且使g亥遮蔽板重疊於電弧氣體排出口的開口端面，並且 ’將其一端卡止固定於斷路器盒的外壁面上。具體而言， 以下述的形態構成。 (1 )將穿孔於遮蔽板的端部之開孔嵌合於形成在斷 路器盒的外壁部的卡止突起而鉚止著。 (2 )將遮蔽板的前端耳部嵌入於形成在斷路器盒側 的卡合槽後，可卡止/脫離地保持著。 在於上述結構的防塵構造，平時，遮蔽板是用來堵塞 電弧氣體排出口，防止塵埃由周圍侵入到斷路器盒的內部 本紙張尺度適用中國國家標準（CMS ) A4規格（210X297公釐〉 (請先閱讀背面之注意事項再填寫本頁) .裝. 訂 趣濟部智慧財產局員工消費合作杜印製 -6- 經濟部智慧財產局員工消費合作社印製 541558 A7 _B7_ 五、發明説明（> 。在此情況下，以預先將遮蔽板的卡合耳部卡合保持於盒 側的卡合槽，能夠確保穩定的防塵功能。另一方面，當電 路斷路器的電流斷路時，受到產生於消弧室的電弧氣體壓 之遮蔽板朝外側打開而將電弧氣體排出。再者，若電弧消 失的話，則遮蔽板是彈性返回到原來的位置，再次堵塞電 弧氣體排出口。 又，遮蔽板是不須要進行彎折加工的單純之平坦薄板 ’且對斷路器盒直接地鉚止固定於其外壁面，藉此，可減 低遮蔽板的成本，並且朝斷路器盒的安裝也簡單，又容易 對應組裝機器人等的自動組裝方式。 【發明之實施形態】 根據第1至3圖所不的實施例說明本發明的實施形態 。再者’在於第1圖’賦予對應第4圖的構件相同的圖號 且省略其說明。 第1 ( a ) 、（ b )圖係將本發明的防塵構造適用於 自動斷路器的實施例之構成圖，在斷路器盒1的電源側端 子α的下側，形成呈開口狀的連通於內置在盒內部的消弧 室9之電弧氣體排出口 1 c，以下述的方法重疊於盒壁面 的外側安裝防塵用遮蔽板1 〇來堵塞此電弧氣體排出口 1 c ° 即，遮蔽板1 0是以具有厚度〇 ·數麵程度的撓曲性 的平坦先微薄板來製作，如第2圖所示，在薄板的下端部 形成呈開口狀的左右一對的安裝孔1 〇 C ，在上端形成朝 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐) ----- (請先閲讀背面之注意事項再填寫本頁)5. In the description of the invention () B, it is not easy to correspond to the automatic assembly method of the assembly robot, etc. The action of assembling the shielding plate must rely on manual work. Furthermore, after the shield plate 1 Q is installed 'when the cover 1 b of the circuit breaker box 1 is not assembled and the circuit breaker box 1 is toppled during assembly', the shield plate and the arc extinguishing chamber fall off together. The present invention has been made in view of the above-mentioned problems, and an object thereof is to solve the foregoing problems and to provide a shield plate and a mounting structure capable of improving the shield plate with a simple structure and easily supporting automatic assembly without requiring manual work. Dustproof structure of circuit breaker. [Problem to be Solved by the Invention] In order to achieve the above-mentioned object, according to the present invention, an arc gas discharge opening is formed on the end surface of the circuit breaker box and communicates with the arc-extinguishing chamber inside the box, and dustproof is used. The shielding plate is mounted on the circuit breaker box to cover the dust-proof structure of the circuit breaker of the outlet surface of the arc gas discharge port, and is characterized in that the shielding plate is formed by a flat flat plate having flexibility and shields the shield. The plate overlaps the open end surface of the arc gas discharge port, and 'an end thereof is locked and fixed on the outer wall surface of the circuit breaker box. Specifically, it is comprised as follows. (1) An opening punched into an end portion of the shielding plate is fitted into a locking projection formed on an outer wall portion of the circuit breaker box and is riveted. (2) The front ears of the shield plate are fitted into the engaging grooves formed on the circuit breaker box side, and are held in a snap-on / detachable manner. Due to the dust-proof structure of the above structure, the shield plate is usually used to block the arc gas discharge port to prevent dust from invading into the inside of the circuit breaker box. The paper size is applicable to the Chinese National Standard (CMS) A4 specification (210X297 mm> (Please (Please read the notes on the back before filling this page). Packing. Ordered by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperation Du printed -6- Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives printed 541558 A7 _B7_ V. Description of the Invention (> In this case, it is possible to secure the dustproof function by engaging the retaining ears of the shield plate in the engagement grooves on the box side in advance. On the other hand, when the current of the circuit breaker is interrupted, it is generated in The shield plate of the arc gas pressure of the arc suppression chamber is opened to the outside to discharge the arc gas. Furthermore, if the arc disappears, the shield plate elastically returns to the original position and blocks the arc gas discharge port again. The shield plate is A simple flat sheet that does not require bending, and the circuit breaker box is directly riveted and fixed to its outer wall surface, thereby reducing the formation of the shielding plate. Moreover, the installation to the circuit breaker box is simple, and it is easy to correspond to an automatic assembly method of an assembly robot, etc. [Embodiments of the invention] The embodiments of the present invention will be described based on the embodiments shown in Figs. Fig. 1 'assigns the same drawing number to the member corresponding to Fig. 4 and its description is omitted. Figs. 1 (a) and (b) are structural diagrams of an embodiment in which the dustproof structure of the present invention is applied to an automatic circuit breaker. An arc gas discharge port 1 c is formed at the lower side of the power supply-side terminal α of the circuit breaker box 1 and communicates with the arc extinguishing chamber 9 built in the box. The shielding plate 10 is used to block the arc gas discharge port 1 c °. That is, the shielding plate 10 is made of a flat, first-thin sheet having a thickness of about 0.1 °, which is flexible, as shown in FIG. 2. A pair of left and right mounting holes 10 ° C are formed at the lower end portion, and the upper end is formed toward the size of the paper, which applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ----- (Please read the back Matters needing attention page)
541558 A7 B7 五、發明説明（b (請先閱讀背面之注意事項再填寫本頁) 左右側方稍稍突出的卡合耳部1 〇 d。另一方面，在斷路 器盒1的外壁面，預先配合前述遮蔽板1 〇的安裝孔 10c ，如第3 (a)圖所示將卡止突起id—體成形， 並且在電弧氣體排出口1c的上方形成插入遮蔽板10的 卡合耳部1 0 d而卡止保持的左右一對之卡合槽1 e。 然後，對於將遮蔽板1 0安裝於斷路器盒1 ，將遮蔽 板的安裝孔1 0 c嵌插於盒側的卡止突起1 d ，並且，利 用熱鉚接法等將突起1 d的前端壓碎如第3圖所示，固定 遮蔽板1 0。又，形成於遮蔽板1 〇的上端側的卡合耳部 1 0 d是插入於盒側的卡合槽1 e。再者，此遮蔽板1 〇 的安裝作業是以使用組裝機器人的自動組裝製程進行。 利用上述結構，在使用電路斷路器的狀態下，平時， 遮蔽板1 0是由外側堵塞電弧氣體排出口 1 c的開口端面 ，防止塵埃等由周圍入侵到盒內部。 經濟部智慧財產局員工消費合作社印製 另一方面，當電路斷路器的電流斷路時，承受產生於 消弧室9內電弧氣體之氣壓，遮蔽板1 〇的卡合耳部 1 0 d與盒側的卡合槽1 e的卡合脫離，遮蔽板1 〇是如 第3 ( b )圖的虛線所示，將電弧氣體排出到外部。再者 ’當電弧消失後，遮蔽板以本身的彈性返回到原來的位置 而堵塞電弧氣體排出口 1 c。又，當在此狀態下將遮蔽板 的卡合耳部1 0 d朝前方按押時，嵌入至盒側的卡合槽 1 e而返回當初的狀態。 【發明效果】 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -8- 541558 A7 B7 五、發明説明（后 (請先閱讀背面之注意事項再填寫本頁) 如上所述，若根據本發明的結構的話，關於安裝於盒 的外壁面用來覆蓋開口於斷路器盒的端面之電弧氣體排出 口之遮蔽板，以具有撓曲性的平坦薄板形成前述遮蔽板， 且使該遮蔽板重疊於電弧氣體排出口的開口端面，並且， 將其一端卡止固定於斷路器盒的外壁面上者；利用將穿孔 於遮蔽板的端部之開孔嵌合於形成在斷路器盒的外壁部的 卡止突起而鉚止，來作爲其固定方法，比起以往的遮蔽板 及其安裝構造，不僅不須要進行遮蔽板的彎曲加工，且還 能簡單地安裝於斷路器，也可充分地對應組裝機器人之自 動組裝方式。 又，利用將形成於遮蔽板的前端側之卡合耳部將遮蔽 板的前端耳部嵌入於形成在斷路器盒側的卡合槽後，可卡 止/脫離地保持之方法，不會產生在使用中遮蔽板捲起之 情形，能確保穩定的防麈功能。 【圖面之簡單說明】 經濟部智慧財產局員工消費合作社印製 第1圖係採用本發明的防塵構造之自動斷路器的構成 圖：（a ) 、（ b )分別是其正面圖及側斷面圖。 第2圖係第1圖的防塵用遮蔽板之正面圖。 第3圖係顯示朝第1圖的斷路;器盒安裝遮蔽板的構造 之局部斷面圖：（a)是遮蔽板妾％，丨的狀態圖、（b ) 是遮蔽板安裝後的狀態圖。 ' \ : 第4圖係採用以往的防塵構造的電路斷路器之構成斷 面圖。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -9- 541558 A7 B7 五、發明説明（y (請先閲讀背面之注意事項再填寫本頁) 第5圖係安裝於第4圖的斷路器盒的防塵用遮蔽板之 外形圖：（a )〜（c )分別是其正面圖、側面圖及平面 圖。 ' 第6圖係內置於第4圖的電路斷路圖的消弧室之構成 圖：（a ) 、（ b )分別是其側面圖及平面圖。 【圖號說明】 1…斷路器盒 1 c…電弧氣體排出口 1 d…卡止突起 1 e…卡合槽 2…固定接觸子 3…可動接觸子 9…消弧室 1 0…遮蔽板 1 0 C…安裝孔 1 0 d…卡合耳部 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -10-541558 A7 B7 V. Description of the invention (b (please read the precautions on the back before filling in this page) The engaging ears 1 0d protruding slightly on the left and right sides. On the other hand, on the outer wall surface of the circuit breaker box 1, In accordance with the mounting hole 10c of the shielding plate 10, the locking protrusion id is integrally formed as shown in FIG. 3 (a), and an engaging ear portion 10 for inserting the shielding plate 10 is formed above the arc gas discharge port 1c. d and the left and right pair of engagement grooves 1 e that are latched and held. Then, for mounting the shielding plate 10 on the circuit breaker box 1, the mounting hole 10 c of the shielding plate is fitted into the locking protrusion 1 on the side of the box. d, and the front end of the projection 1 d is crushed by a thermal caulking method or the like as shown in FIG. 3, and the shielding plate 10 is fixed. The engaging ear portion 1 0 d formed on the upper end side of the shielding plate 10 is Inserted into the engaging groove 1 e on the side of the box. The installation of the shielding plate 10 is performed by an automatic assembly process using an assembly robot. With the above structure, the shielding plate is usually used in a state of a circuit breaker. 10 is the end face of the opening of the arc gas discharge port 1c blocked from the outside to prevent dust Intruded from the surroundings into the box. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. On the other hand, when the current of the circuit breaker is interrupted, it bears the pressure of the arc gas generated in the arc extinguishing chamber 9 and the shielding plate 10 is engaged. The ear portion 10 d is disengaged from the engagement groove 1 e on the box side, and the shielding plate 10 is exhausted to the outside as shown by the dotted line in FIG. 3 (b). Furthermore, when the arc disappears The shielding plate returns to its original position with its own elasticity and blocks the arc gas discharge port 1 c. When the engaging ear portion 10 d of the shielding plate is pressed forward in this state, it is inserted into the box side. Engage the slot 1 e and return to the original state. [Effects of the invention] The paper size applies the Chinese National Standard (CNS) A4 (210X 297 mm) -8- 541558 A7 B7 V. Description of the invention (after (please read the back first) (Notes on this page, please fill in this page) As mentioned above, according to the structure of the present invention, the shielding plate installed on the outer wall surface of the box to cover the arc gas discharge port opening on the end face of the circuit breaker box has a deflection. Sexual flat sheet shape The shielding plate is overlapped with the opening end surface of the arc gas discharge port, and one end of the shielding plate is locked and fixed on the outer wall surface of the circuit breaker box; As a fixing method, it is riveted by locking protrusions formed on the outer wall of the circuit breaker box. Compared with the conventional shielding plate and its mounting structure, not only does the bending process of the shielding plate be unnecessary, but also it can be simply performed. It can be installed on the circuit breaker and can fully support the automatic assembly method of the assembling robot. In addition, the front end ear portion of the shielding plate is embedded in the card formed on the circuit breaker box side by using the engaging ear portion formed on the front end side of the shielding plate. After closing, the method of holding / detaching can be maintained, which will not cause the shielding plate to roll up during use, and can ensure a stable anti-moth function. [Brief description of the drawing] Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, the first picture is the structure diagram of the automatic circuit breaker using the dust-proof structure of the present invention: (a), (b) are its front view and side section, respectively Face view. Fig. 2 is a front view of the dust-proof shielding plate of Fig. 1; Fig. 3 is a partial cross-sectional view showing the structure of the shield plate installed in the device box: (a) is a state diagram of the shield plate 妾%, and (b) is a state diagram after the shield plate is installed . '\: Figure 4 is a sectional view showing the structure of a circuit breaker using a conventional dust-proof structure. This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -9- 541558 A7 B7 V. Description of the invention (y (Please read the notes on the back before filling this page) Figure 5 is installed on the fourth (A) to (c) are front views, side views, and plan views of the shield plate for dustproofing of the circuit breaker box shown in the figure, respectively. 'FIG. 6 is an arc-extinguishing chamber built into the circuit disconnection diagram of FIG. 4. Structure diagram: (a) and (b) are its side view and plan view, respectively. [Illustration of drawing number] 1 ... breaker box 1 c ... arc gas discharge port 1 d ... locking protrusion 1 e ... engaging groove 2 ... Fixed contactor 3 ... movable contactor 9 ... arc chamber 1 0 ... shielding board 1 0 C ... mounting hole 1 0 d ... engagement ear CNS) A4 specification (210X297 mm) -10-