201025205 六、發明說明： 【發明所屬之技術領域】 本發明是關於一種將火災警報器本體安裝在安裝基座 上的火災警報器。 【先前技術】 火災警報器是作成藉著相對於安裝基座轉動火災警報 Φ 器本體的方式，將火災警報器本體可裝卸地安裝在安裝基 座。並且’在這種旋轉鎖緊嵌合機構的火災警報器，連結 彈簧構件、延長臂、閉塞構件，作爲防止在電池未安裝時 ’成爲嵌合狀態用的電池鎖緊機構，並藉著往電池承接區 域電池的插入’可將基部（火災警報器本體）卡止在中括 號（安裝基座）《例如參閱專利文獻1》。 [先前技術文獻] © [專利文獻] [專利文獻1]日本特開平03-103796號公報 【發明內容】 [發明所欲解決之課題] 然而’專利文獻1記載的電池鎖緊機構零件件數多， 而會有所謂也需要組裝作業的問題。 本發明的目的提供一種具備不需組裝作業的電池鎖緊 機構的火災警報器。 -5- 201025205 [解決發明用的手段] 本發明的火災警報器，是相對於設有齒支承部的安裝 基座，將設有齒部的火災警報器本體朝安裝方向轉動，藉 著將上述齒部嵌入上述齒支承部的方式，將上述火災警報 器本體可裝卸地安裝在上述安裝基座的火災警報器，其特 徵爲，具備有：陷入上述火災警報器本體的背面板所形成 的電池收納部；以及從電池的側面接觸的上述電池收納部 的底部至上述齒部附近，而一體形成在上述背面板，並且 將可依上述電池收納部的電池收納狀態，將轉動軌跡朝上 下方向移動，來改變與上述齒支承部的位置關係的止擋片 形成在前端的止擋構件。 [發明的效果] 本發明的火災警報器的效果，由於是將由齒部、齒支 承部及止擋構件構成的電池鎖緊機構之中的齒部及止擋構 @ 件一體形成在火災警報器本體的背面板，將齒支承部一體 形成在安裝基座，而使電池鎖緊機構與背面板或所謂安裝 基座需要的零件成爲一體化，所以不需作爲電池鎖緊機構 的個別的零件，且不需組裝作業。 【實施方式】 [實施發明用的形態] 圖1爲實施本發明用的最佳形態的火災警報器的前視 -6- 201025205 圖與側視圖。圖2爲圖1的安裝基座的立體圖。圖3爲圖 1的火災警報器本體的立體圖。圖4爲圖3的火災警報器 本體的背面板與保護蓋的立體圖。圖5爲本發明的止擋構 件與齒部的放大立體圖。 實施本發明用的最佳形態的火災警報器1是如圖1所 示’具備：火災警報器本體2與安裝基座3。 安裝基座3是以螺絲等的安裝構件被安裝在安裝火災 〇 警報器1的天花板等的安裝處。然後，安裝基座3是如圖 2所示’爲有底高度低的圓筒，且具有：圓板狀的底板4 與圓筒狀的側板5。 在底板4 ’與側板5同心圓狀的肋6在側板5的內側 跨大致一周突出，並開設有讓螺絲穿過的穿過孔7。然後 ’在肋6的兩處設有齒支承部8。 齒支承部8與底板4之間，具有：具預定間隙的平板 狀的下扣部9;以及用來安裝在安裝基座3，而將火災警 ® 報器本體2朝轉動的方向（以下稱爲安裝方向）轉動，當 被定位在預定的位置時，阻攔火災警報器本體2進一步轉 動的阻攔止擋部10。 在側板5設有將厚度作薄的薄板部1 1，防盗用而以 鎖固螺絲與防鬆螺母固定火災警報器本體2與安裝基座3 時，將薄板部11折斷去除的話，會成爲內包鎖固螺絲頭 部的缺口部。 火災警報器本體2，是如圖3與圖4所示，藉著保護 蓋16與背面板17的螺止，夾著火災感知部的一個例子的 201025205 煙感知部1 3、控制板1 4、揚聲器1 5等的功能構件。 保護蓋16是由底板16a與側板16b構成漏斗狀，將 設有與背面板17螺止用的螺絲孔的柱18與背面板17疊 合時，包圍並封閉開口 19使異物不會從被設在背面板17 的開口 1 9進入影響到煙感知部1 3、控制板14、揚聲器 15等功能構件的包圍壁20。 包圍壁20，具有：從側板16b朝略正交的方向延伸 出的兩個側壁部：與連接兩個側壁部的前端側的內側壁部 n 。包圍壁20可防止螺絲等的異物從開口 19進入時，滞留 在包圍壁20的內側，往保護蓋16內部脫落的情況。 在包圍壁20，限制肋22呈一體而設。限制肋22疊 合在背面板17時，位在背面板17的齒部21正下的包圍 壁20的側壁部（安裝方向側）的頂部朝背面板17的方向 延伸。限制肋22是當相對於安裝基座3將沒有安裝電池 的火災警報器本體2朝安裝方向轉動時，可使止擋片23 因齒支承部8的下扣部9被朝著與安裝方向的反方向按壓 © 時不會移動，且可使片支撐部25抵接在限制肋22，而不 會在往齒部21的方向移動。該限制肋22是突出設在開口 1 9內。 又，在包圍壁20，限制片26呈一體而設。限制片26 是從設有限制肋22的包圍壁20的側壁部（安裝方向側） 朝略正交的方向延伸出的壁部、安裝方向側前端部被連接 在與包圍壁20的側壁部同樣的壁部而予以強化。限制片 26被疊合在背面板17時，位在止擋構件24的止擋片支 -8 - 201025205 撐部25的正下方，且其頂部朝向安裝方向，在後方側呈 平坦，在前方側形成傾斜。止擋片支撐部2 5是當電池被 安裝在電池收納部27時，朝向轉動方向（安裝方向）傾 斜變形使前方側變低，所以將限制片26的頂部斜切讓變 形部退縮。 另一方面，沒有將電池安裝在電池收納部27時，以 安裝基座3的從正上方按壓齒支承部8止擋片23時，由 〇 於止擋片支撐部25會抵接在限制片26頂部的平坦部分， 所以不會被壓低，據此，將火災警報器本體2朝安裝方向 轉動時，止擋片23會藉著卡止在安裝基座3的齒支承部 8的下扣部9的方式，而不會更進一步地轉動、所以可防 止誤將沒有安裝電池的火災警報器本體2安裝到安裝基座 3的情況。 背面板17，具有：圓板狀的中板30、和與中板30的 外周抵接的圓筒狀的側板3 1。 . 在中板30，設有：被打開的開口 34、35，而可從安 裝基座3側將對方連接器連接到被安裝在控制板14的電 池用連接器32及移報用連接器33;將機器面板41引導 到黏貼位置的導引突起（黏貼引導的一個例子）36、37 ; 和具保護蓋16的螺絲孔的柱1對向的孔38;保持防鬆螺 母的螺母保持部39;在保護蓋16側呈半圓筒狀下凹的電 池收納部27;當電池安裝在電池收納部27時，保持電池 使電池不會從安裝位置掉下的保持構件40 ;以及形成有 當電池安裝在電池收納部27時，退避到不會抵到安裝基 -9- 201025205 座3的齒支承部8的下扣部9的位置的止擋片23的止擋 構件24。 火災警報器1有：將發報移送到外部機器的機種與γ 移送發報的機種的兩種機種，在移報的機器安裝有對控制J 板14移報用連接器33。而且作爲黏貼到背面板17的機 器面板41也有兩種類。本發明中，在移報的機種與不移 報的機種，將機器面板41的大小設成不同，並且黏貼時 所使用的導引突起36、37也設有兩種類。 @ 螺母保持部39是保持通過側板31的切口部42，朝 直徑方向插入到內側與鎖固螺絲嵌合的防鬆螺母。而且， 螺母保持部39是從中板30呈剖面：3字狀縱立，並且具有 分別覆蓋防鬆螺母的對向的兩個端面的一對保持壁43。 保持壁43爲所使用的防鬆螺母的寬幅以上的高度。又， 保持壁43在可插入防鬆螺母側之壁部的上端設有防鬆螺 母無法簡單脫離的突起44。 止擋構件24是如圖5所示，具有：在電池收納部27 Q 的電池的半圓筒狀的側面接觸的底部45，藉著與半圓筒 狀的直徑方向平行而設的兩個槽隙46，使一端被支撐在 電池收納部27的底部45的懸臂樑47 ;從懸臂樑47的自 由端48朝電池收納部27的軸方向延伸的止擋片支撐部 25 ;以及從止擋片支撐部25沿著側板3 1縱立的止擋片 23。在止擋片23設有補強用肋49。 止擋片23是當電池沒有安裝在電池收納部27時（以 下稱爲沒有安裝電池時），將火災警報器本體2安裝到安 -10- 201025205 裝基座3時，在轉動火災警報器本體2的方向（以下稱爲 安裝方向。此外，將火災警報器本體2從安裝基座3卸下 時，將轉動火災警報器本體2的方向稱之爲卸下的方向。 )，位在齒部21的導引部50的前側，而使止擋片23的 頂部比齒支承部8的下扣部9位在更上方。 懸臂樑47，具有：直徑比電池收納部27的半圓筒狀 的半徑小的圓弧狀的樑51、與從圓弧狀的樑51延伸的平 φ 板狀的樑52。該平板狀的樑52的圓弧狀的樑51連接端 的相反側的端爲自由端4 8。 接著，將電池安裝在電池收納部27時，由於圓弧狀 的樑5 1會朝向與保護蓋1 6接近的方向傾斜，所以自由端 48會朝與保護蓋16接近的方向沈下，並接近側板31的 內側面。此時，由於在側板3 1的內側面側設有退避部53 ，所以即使自由端48接近側板3 1的內側面，也不會與側 板31接觸並可變形。 ® 止擋片支撐部25是從懸臂樑47的自由端48沿著側 板31的內側面朝卸下的方向延伸。接著，當懸臂樑47的 自由端48朝保護蓋16接近的方向下沈的同時，朝側板 3 1的內側面變形而接近時，止擋片支撐部2 5會變形使得 與懸臂樑47連接的位置成爲最下沈的位置，而相反側的 下沈則爲最小。因此，止擋片23是以安裝方向爲下’一 面傾斜一面與保護蓋16接近。此時，止擋片23的頂部比 齒支承部8的下扣部9低。此時，止擋片23的頂部比齒 支承部8的下扣部9低。因此，一面將火災警報器本體2 -11 - 201025205 按壓在安裝基座3 —面朝安裝方向旋轉時，由於齒支承部 8的下扣部9會通過止擋片23的頂部與齒部21的導引部 50之間，使齒部21與導引部50嵌入，所以能防止火災 警報器本體2從安裝基座3落下的情況。 止擋片23的頂部從安裝方向的前端到中央雖呈平坦 ，但卻施予倒角加工使得從中央變低的取出終端成爲最低 。如此’有施予倒角加工的話，將火災警報器本體2從安 裝基座3取下時，由於止擋片23的頂部與齒支承部8的 ❹ 下扣部9的間隙寬，所以可開始順暢地轉動。 側板3 1 ’在與以中板3 0的中心爲中心的對角的位置 設有：齒部21 ;將側板從內側挖薄，當止擋構件2 4變形 時，不會對動作造成阻礙的退避部53;以及能通過停止 火災警報器本體2的轉動用的鎖固螺絲的切口部42。 齒部21’具有：從面對側板31的安裝基座3側的頂 部的內預定長度的頂部往內側以預定的厚度延伸的導引部 50;與將火災警報器本體2朝安裝方向轉動時，齒支承部 ❹ 8的下扣部9抵接，來限制火災警報器本體2進一步轉動 的限制部5 4。 接著，說明欲將沒有安裝電池的火災警報器本體2安 裝到安裝基座3時的情況。 由於電池未安裝力量沒有施加在止擋構件24的懸臂 樑47,所以止擋片23的頂部比安裝基座3的齒支承部8 的下扣部9位於上方，將火災警報器本體2朝安裝方向轉 動時，止擋片23的側端面會抵到下扣部9。因此，由於 -12- 201025205 火災警報器本體2無法再進一步朝安裝方向轉動，所以無 法將火災警報器本體2安裝到安裝基座3。 接著，說明將安裝了電池的火災警報器本體2安裝到 安裝基座3的情況。 將電池安裝到電池收納部27時，力量會朝向保護蓋 16的方向施加在懸臂樑47，而使懸臂樑47的自由端48 朝與保護蓋16接近的方向下沈的同時，變形而與側板31 ❿ 的內側面接近。於是，止擋片支撐部25會變形使得與懸 臂樑47連接的位置成爲最下沈的位置，而相反側的下沈 則爲最小。因此，止擋片23是以安裝方向爲下，一面傾 斜一面與保護蓋16接近。此時，由於止擋片23頂部的位 置比齒支承部8的下扣部9位於下方，所以，齒支承部8 的下扣部9通過止擋片23的頂部之上，而與齒部21的導 引部50嵌入，可將火災警報器本體2安裝到安裝基座3 〇 © 本發明的火災警報器是藉著相對於設有齒支承部8的 安裝基座3，將設有齒部21的火災警報器本體2朝安裝 方向轉動’使上述齒部21嵌入上述齒支承部8的方式， 將上述火災警報器本體2可裝卸地安裝在上述安裝基座3 的火災警報器1’且具備有：陷入上述火災警報器本體2 的背面板17所形成的電池收納部27;以及從電池的側面 接觸的上述電池收納部27的底部45至上述齒部21附近 ，而一體形成在上述背面板17，並且將可依上述電池收 納部27的電池收納狀態，將轉動軌跡朝上下方向移動， -13- 201025205 來改變與上述齒支承部8的位置關係的止擋片23形成在 前端的止擋構件24。 上述止擋片23是在電池沒有被收納在上述電池收納 部27的狀態下’使上述齒支承部8位在該止擋片23的轉 動軌跡上’來阻止上述齒部21嵌入上述齒支承部8，在 電池被收納於上述電池收納部27的狀態下，使該止擋片 23的轉動軌跡朝下方移動，讓上述齒支承部8不會位在 該轉動軌跡上，而使上述齒部21嵌入上述齒支承部8。 ® 如此’由於是由與安裝基座3形成一體的齒支承部8、和 與火災警報器本體2的背面板17形成一體的齒部21及止 擋構件24構成作爲鎖住安裝使得電池未安裝的火災警報 器本體2無法安裝到安裝基座3的電池鎖機構，所以只有 不需電池鎖機構的零件，且不需構成電池鎖機構的組裝作 業。 又，上述火災警報器本體2具有上述齒部21，並且 具備：在上述齒部21的正下方形成有開口 19的上述背面 ❹ 板17;與覆蓋上述背面板17的保護蓋16，上述保護蓋 16是將電池沒有被收納在上述電池收納部27的狀態下， 上述齒支承部8將上述止擋片23朝與上述安裝方向的反 方向推的時候，限制朝著與上述止擋片23的上述安裝方 向的反方向移動的限制肋22設在開口 19內。 上述保護蓋16設有對應上述開口的脫落防止用包圍 壁20，上述限制肋22是與上述脫落防止用包圍壁20呈 一體而設。如此，由於是藉由齒支承部8的下扣部9，使 -14- 201025205 得被朝與安裝方向的反方向按壓的止擋片23的下部，藉 著與保護蓋16的包圍壁20設置成爲一體的限制肋22, 限制往安裝方向的反方向的移動，所以可防止電池未安裝 時，止擋片23被朝與安裝方向的反方向按壓而斷裂的情 況。 又，上述火災警報器本體2，具備：具上述齒部21 的上述背面板17、與覆蓋上述背面板17的保護蓋16，上 Φ 述保護蓋16設有電池沒有被收納在上述電池收納部27的 狀態下，限制上述止擋片23即使從正上方被按下，也不 會朝下方移動的同時，當電池被收納在上述電池收納部 27的狀態下，允許上述止擋片23 —面傾斜一面朝下方移 動的限制片26。 上述保護蓋16設有對應上述開口 19的脫落防止用包 圍壁20，上述限制片26是與上述脫落防止用包圍壁20 呈一體而設。如此，藉著齒支承部8的下扣部9被往下方 © 向按壓的止擋片23，由於會因與被設在其下面的保護蓋 1 6的包圍壁20成一體的限制片26頂部的平坦部分，限 制往下方的移動，所以可防止止擋片23朝保護蓋1 6側退 縮，並可防止電池未安裝的火災警報器本體2誤裝到安裝 基座3的情況。 又，上述止擋片23是朝向上端寬幅變窄。假設因設 計誤差等，而強制地將電池未安裝的火災警報器本體2朝 安裝方向轉動，使齒部21嵌入到齒支承部8時，由於齒 部21側被作成倒角’而使止擋片23朝向上端寬幅變窄， -15- 201025205 所以可藉著將火災警報器本體2朝卸下方向轉動的方式， 而容易從安裝基座3取下。 接著，說明爲了讓火災警報器本體2不易被盜，而利 用鎖固螺絲與防鬆螺母將火災警報器本體2固定在安裝基 座3。 欲施予防盜時，先折斷安裝基座3的薄板部11形成 切口部，再安裝到安裝處。 接著，將防鬆螺母插入火災警報器本體2的螺母保持 Q 部39的保持壁43之間。然後，如上所述，將安裝著電池 的火災警報器本體2安裝到安裝基座3。 接著，將鎖固螺絲從安裝基座3的切口部、背面板 17的切口部42插入，與被插入保持壁43間的防鬆螺母 螺旋固定。這樣的話，鎖固螺絲的頭部能藉著切口部42 被固定。其結果，鎖固螺絲的頭部被內包在安裝基座3的 切口部，即使火災警報器本體2欲朝卸下的方向轉動，鎖 固螺絲的頭部會抵在安裝基座3，使火災警報器本體2不 〇 能轉動，而可防止被盜。 在本發明的螺母保持部39，由於是藉著防鬆螺母61 的寬幅以上高度的3字狀的保持壁43，保持防鬆螺母61 的兩個端面，所以將鎖固螺絲62鎖緊在防鬆螺母61時， 即使對防鬆螺母61施加旋轉的力，也可藉著保持壁43予 以保持，並可防止防鬆螺母61的旋轉。 又’由於在插入保持壁43的防鬆螺母側的壁部設有 突起44 ’所以防鬆螺母61即使以鎖固螺絲62鎖緊，也 -16- 201025205 可防止防鬆螺母61從保持壁43脫落的情況。 【圖式簡單說明】 [圖1]爲實施本發明用的最佳形態的火災警報器的前 視圖與側視圖。 [圖2]爲圖1的安裝基座的立體圖。 [圖3]爲圖1的火災警報器本體的立體圖。 〇 [圖4]爲圖3的火災警報器本體的背面板與保護蓋的 立體圖。 [圖5]爲放大止擋構件與齒部的立體圖。 【主要元件符號說明】 1 :火災警報器 2 =火災警報器本體 3 :安裝基座 _ 4 :底板 5 :側板 6 :肋 7 :孔 8 :齒支承部 9 :下扣部 1 〇 :止擋部 1 1 :薄板部 1 3 :煙感知部 -17- 201025205 1 4 :控制板 15 :揚聲器 16 :保護蓋 1 7 :背面板 18 :柱 19 :開口 20 :包圍壁 21 :齒部 ❿ 22 :限制肋 23 :止擋片 24 :止擋構件 25 :止擋片支撐部 2 6 :限制片 2 7 :電池收納部 3 0 :中板 3 1 :側板 © 3 2 :電池用連接器 33 :移報用連接器 34 、 35 :開口 36、37:導引突起 38 :孔 3 9 :螺母保持部 40 :保持構件 41 :機器面板 -18- 201025205 ❿ :切口部 :保持壁 :突起 :底部 :槽隙 :懸臂樑 :自由端 :補強用肋 :導引部 :圓弧狀的樑 :平板狀的樑 :退避部 :限制部 -19-201025205 VI. Description of the Invention: [Technical Field] The present invention relates to a fire alarm for mounting a fire alarm body on a mounting base. [Prior Art] The fire alarm is configured such that the fire alarm body is detachably attached to the mounting base by rotating the fire alarm Φ body with respect to the mounting base. Further, in the fire alarm of the rotary locking mechanism, the spring member, the extension arm, and the blocking member are connected to each other as a battery locking mechanism for preventing the fitting state when the battery is not mounted, and the battery is attached to the battery. The insertion of the receiving area battery 'locks the base (fire alarm body) to the brackets (mounting base). For example, see Patent Document 1. [PRIOR ART DOCUMENT] [Patent Document 1] [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 03-103796 (Patent Document) [Problems to be Solved by the Invention] However, the number of parts of the battery locking mechanism described in Patent Document 1 is large. There will be problems with the so-called assembly work. SUMMARY OF THE INVENTION An object of the present invention is to provide a fire alarm device having a battery locking mechanism that does not require an assembly work. -5-201025205 [Means for Solving the Invention] The fire alarm device of the present invention rotates the fire alarm main body provided with the tooth portion in the mounting direction with respect to the attachment base provided with the tooth support portion. A fire alarm in which the fire alarm main body is detachably attached to the mounting base, and the battery is formed by a back panel that is caught in the fire alarm main body, in which the tooth portion is fitted into the tooth support portion. a accommodating portion; and a bottom plate formed integrally with the bottom portion of the battery accommodating portion that is in contact with the side surface of the battery, and is configured to move the trajectory in the vertical direction in a state in which the battery accommodating portion can be stored in the battery The stopper member that changes the positional relationship with the above-described tooth support portion is formed at the front end. [Effects of the Invention] The effect of the fire alarm of the present invention is that the tooth portion and the stopper structure of the battery locking mechanism including the tooth portion, the tooth support portion, and the stopper member are integrally formed in the fire alarm. The back panel of the main body integrally forms the tooth support portion on the mounting base, and the battery locking mechanism is integrated with the back panel or the components required for the so-called mounting base, so that it is not required to be an individual component of the battery locking mechanism. And no assembly work is required. [Embodiment] [Embodiment for Carrying Out the Invention] Fig. 1 is a front view -6-201025205 and a side view of a fire alarm of a best mode for carrying out the present invention. 2 is a perspective view of the mounting base of FIG. 1. Fig. 3 is a perspective view of the fire alarm body of Fig. 1. Figure 4 is a perspective view of the back panel and the protective cover of the fire alarm body of Figure 3; Figure 5 is an enlarged perspective view of the stop member and the tooth portion of the present invention. The fire alarm 1 of the best mode for carrying out the present invention is provided with a fire alarm body 2 and a mounting base 3 as shown in Fig. 1 . The mounting base 3 is attached to a ceiling or the like where the fire 警报 alarm 1 is attached by a mounting member such as a screw. Then, the mounting base 3 is a cylinder having a low bottom height as shown in Fig. 2, and has a disk-shaped bottom plate 4 and a cylindrical side plate 5. The rib 6 concentrically with the side plate 4' and the side plate 5 protrudes substantially at the inner side of the side plate 5, and is provided with a through hole 7 through which the screw passes. Then, the tooth support portion 8 is provided at two places of the rib 6. Between the tooth support portion 8 and the bottom plate 4, there is a flat-shaped lower buckle portion 9 having a predetermined gap; and a direction for mounting on the mounting base 3 to rotate the fire alarm detector body 2 (hereinafter referred to as Rotating for the mounting direction, blocking the stop 10 of the further rotation of the fire alarm body 2 when positioned in the predetermined position. When the side plate 5 is provided with a thin plate portion 1 1 having a small thickness, when the fire alarm body 2 and the mounting base 3 are fixed by the locking screw and the lock nut, the thin plate portion 11 is broken and removed, and the inside is formed. The bag locks the notch of the head of the screw. As shown in FIG. 3 and FIG. 4, the fire alarm main body 2 is a 201025205 smoke sensing unit 13 and a control panel 14 which are an example of a fire sensing unit by a screwing of the protective cover 16 and the back panel 17. Functional components such as the speaker 1 5 . The protective cover 16 is formed in a funnel shape by the bottom plate 16a and the side plate 16b, and when the column 18 and the back plate 17 provided with the screw holes for locking the back plate 17 are overlapped, the opening 19 is closed and closed so that foreign matter is not set. The surrounding wall 20 that affects the functional members such as the smoke sensing portion 13, the control panel 14, and the speaker 15 enters the opening 19 of the back panel 17. The surrounding wall 20 has two side wall portions extending from the side plate 16b in a direction slightly orthogonal to the inner side wall portion n connecting the front end sides of the two side wall portions. The surrounding wall 20 prevents the foreign matter such as a screw from entering the inside of the surrounding wall 20 when it enters the opening 19, and falls inside the protective cover 16. In the surrounding wall 20, the restricting ribs 22 are integrally provided. When the restricting rib 22 is superposed on the back panel 17, the top portion of the side wall portion (mounting direction side) of the surrounding wall 20 directly under the tooth portion 21 of the back panel 17 extends toward the back panel 17. The restricting rib 22 is such that when the fire alarm body 2 to which the battery is not mounted is mounted in the mounting direction with respect to the mounting base 3, the stopper piece 23 can be moved toward the mounting direction by the lower buckle portion 9 of the tooth support portion 8. When the © is pressed in the reverse direction, it does not move, and the sheet supporting portion 25 can be abutted against the restricting rib 22 without moving in the direction toward the tooth portion 21. The restricting rib 22 is protruded from the opening 19. Further, in the surrounding wall 20, the regulating piece 26 is integrally provided. The restricting piece 26 is a wall portion extending from a side wall portion (mounting direction side) of the surrounding wall 20 in which the restricting rib 22 is provided, in a direction slightly orthogonal to each other, and the front end portion in the mounting direction is connected to the side wall portion of the surrounding wall 20 Strengthened by the wall. When the restriction piece 26 is superposed on the back panel 17, it is located directly below the stopper piece -8 - 201025205 of the stopper member 24, and the top thereof faces the mounting direction, and is flat on the rear side, on the front side. Form a slope. When the battery is attached to the battery housing portion 27, the stopper supporting portion 25 is inclined in the rotational direction (mounting direction) to lower the front side. Therefore, the top of the restricting piece 26 is chamfered to allow the deformed portion to be retracted. On the other hand, when the battery is not attached to the battery accommodating portion 27, when the stopper support piece 8 is pressed from the upper side of the attachment base 3, the stopper piece support portion 25 abuts against the restriction piece. The flat portion of the top portion 26 is not depressed, and accordingly, when the fire alarm body 2 is rotated in the mounting direction, the stopper piece 23 is locked by the lower buckle portion of the tooth support portion 8 of the mounting base 3. The manner of 9 does not rotate further, so that it is possible to prevent accidental attachment of the fire alarm body 2 to which the battery is not mounted to the mounting base 3. The back panel 17 has a disk-shaped intermediate plate 30 and a cylindrical side plate 31 that abuts against the outer periphery of the intermediate plate 30. The intermediate plate 30 is provided with openings 34 and 35 that are opened, and the counterpart connector can be connected from the side of the mounting base 3 to the battery connector 32 and the branching connector 33 that are mounted on the control board 14. Guide projections (an example of the adhesion guide) 36, 37 for guiding the machine panel 41 to the pasting position; and a hole 38 opposed to the column 1 having the screw hole of the protective cover 16; a nut holding portion 39 holding the locknut a battery housing portion 27 recessed in a semi-cylindrical shape on the side of the protective cover 16; a holding member 40 that holds the battery so that the battery does not fall from the mounting position when the battery is mounted in the battery housing portion 27; and is formed when the battery is mounted At the time of the battery accommodating portion 27, the stopper member 24 of the stopper piece 23 that does not reach the position of the lower buckle portion 9 of the tooth support portion 8 of the seat base 9-201025205 is retracted. The fire alarm 1 includes two types of models for transferring the report to the external device and the model for transmitting the gamma, and the connector for the control J board 14 is attached to the device for reporting. Further, there are two types of the machine panel 41 which are attached to the back panel 17. In the present invention, the size of the machine panel 41 is set to be different between the type of the report and the type of the non-reported machine, and the guide projections 36 and 37 used for the attachment are also provided in two types. The nut holding portion 39 is a lock nut that is held by the notch portion 42 of the side plate 31 and inserted into the inner side to be engaged with the lock screw in the radial direction. Further, the nut holding portion 39 is a pair of holding walls 43 which are formed in a three-dimensional cross section from the intermediate plate 30 and each of which faces the opposite end faces of the lock nut. The retaining wall 43 is a height above the width of the locknut used. Further, the holding wall 43 is provided at the upper end of the wall portion into which the lock nut can be inserted, and the projection 44 which the lock nut cannot be easily detached is provided. As shown in FIG. 5, the stopper member 24 has a bottom portion 45 that is in contact with the semi-cylindrical side surface of the battery of the battery housing portion 27Q, and two slits 46 that are provided in parallel with the semi-cylindrical diameter direction. a cantilever beam 47 having one end supported by the bottom portion 45 of the battery housing portion 27, a stopper piece supporting portion 25 extending from the free end 48 of the cantilever beam 47 toward the axial direction of the battery housing portion 27, and a stopper supporting portion 25 a stop piece 23 standing along the side plate 31. A reinforcing rib 49 is provided in the stopper piece 23. The stopper piece 23 is when the battery is not attached to the battery housing portion 27 (hereinafter referred to as when the battery is not mounted), and when the fire alarm body 2 is attached to the mounting base 3 of the A-10-201025205, the fire alarm body is rotated. The direction of 2 (hereinafter referred to as the mounting direction. When the fire alarm main body 2 is detached from the mounting base 3, the direction in which the fire alarm main body 2 is rotated is referred to as the direction of removal.) The front side of the guide portion 50 of the 21 is such that the top of the stopper piece 23 is positioned higher than the lower buckle portion 9 of the tooth support portion 8. The cantilever beam 47 has an arc-shaped beam 51 having a diameter smaller than a semi-cylindrical radius of the battery housing portion 27, and a flat φ plate-shaped beam 52 extending from the arc-shaped beam 51. The end on the opposite side to the connecting end of the arcuate beam 51 of the flat beam 52 is a free end 48. Next, when the battery is attached to the battery housing portion 27, since the arc-shaped beam 51 is inclined in a direction approaching the protective cover 16, the free end 48 sinks in a direction close to the protective cover 16 and approaches the side panel. The inner side of 31. At this time, since the escape portion 53 is provided on the inner side surface side of the side plate 31, even if the free end 48 approaches the inner side surface of the side plate 31, it does not come into contact with the side plate 31 and can be deformed. The stopper piece supporting portion 25 extends from the free end 48 of the cantilever beam 47 in the direction in which it is removed along the inner side surface of the side plate 31. Then, when the free end 48 of the cantilever beam 47 sinks in the direction in which the protective cover 16 approaches, the stopper supporting portion 25 is deformed to be connected to the cantilever beam 47 when the inner side surface of the side plate 31 is deformed toward the approach side. The position becomes the most sinking position, while the sinking on the opposite side is the smallest. Therefore, the stopper piece 23 is inclined to the protective cover 16 while being inclined at the side of the mounting direction. At this time, the top of the stopper piece 23 is lower than the lower buckle portion 9 of the tooth support portion 8. At this time, the top of the stopper piece 23 is lower than the lower buckle portion 9 of the tooth support portion 8. Therefore, when the fire alarm body 2 -11 - 201025205 is pressed against the mounting base 3 to face the mounting direction, the lower buckle portion 9 of the tooth support portion 8 passes through the top of the stopper piece 23 and the tooth portion 21 Since the tooth portion 21 and the guide portion 50 are fitted between the guide portions 50, it is possible to prevent the fire alarm body 2 from falling from the attachment base 3. Although the top of the stopper piece 23 is flat from the front end to the center in the mounting direction, the chamfering process is performed so that the take-out terminal which is lowered from the center is the lowest. When the chamfering process is performed, when the fire alarm main body 2 is removed from the attachment base 3, since the gap between the top of the stopper piece 23 and the under buckle portion 9 of the tooth support portion 8 is wide, it is possible to start. Rotate smoothly. The side plate 3 1 ' is provided at a position diagonal to the center of the center plate 30 as a tooth portion 21; the side plate is thinned from the inside, and when the stopper member 24 is deformed, the operation is not hindered. The relief portion 53 and the cutout portion 42 of the locking screw that can stop the rotation of the fire alarm body 2 are provided. The tooth portion 21' has a guide portion 50 extending from a top portion of a predetermined length of the top portion of the side of the mounting base 3 facing the side plate 31 toward the inner side at a predetermined thickness; and when the fire alarm body 2 is rotated in the mounting direction The lower buckle portion 9 of the tooth support portion 8 abuts to restrict the restriction portion 54 of the fire alarm body 2 from further rotating. Next, a case where the fire alarm main body 2 to which the battery is not mounted is attached to the mounting base 3 will be described. Since the battery is not mounted without the force applied to the cantilever beam 47 of the stopper member 24, the top of the stopper piece 23 is positioned above the lower buckle portion 9 of the tooth support portion 8 of the mounting base 3, and the fire alarm body 2 is mounted toward the front. When the direction is rotated, the side end surface of the stopper piece 23 abuts against the lower buckle portion 9. Therefore, since the fire alarm body 2 cannot be further rotated in the mounting direction, the fire alarm body 2 cannot be attached to the mounting base 3. Next, a case where the fire alarm main body 2 to which the battery is attached is attached to the mounting base 3 will be described. When the battery is attached to the battery accommodating portion 27, the force is applied to the cantilever beam 47 in the direction of the protective cover 16, and the free end 48 of the cantilever beam 47 is deformed toward the side close to the protective cover 16, and is deformed to the side plate. 31 The inner side of the ❿ is close. Thus, the stopper piece supporting portion 25 is deformed so that the position connected to the cantilever beam 47 becomes the most sinking position, and the sinking on the opposite side is the smallest. Therefore, the stopper piece 23 is close to the protective cover 16 while being inclined downward in the mounting direction. At this time, since the position of the top of the stopper piece 23 is located below the lower buckle portion 9 of the tooth support portion 8, the lower buckle portion 9 of the tooth support portion 8 passes over the top of the stopper piece 23, and the tooth portion 21 The guide portion 50 is embedded to mount the fire alarm body 2 to the mounting base 3 〇© The fire alarm of the present invention is provided with a tooth portion by means of the mounting base 3 provided with the tooth support portion 8 The fire alarm main body 2 of 21 is rotated in the mounting direction. The fire alarm main body 2 is detachably attached to the fire alarm 1' of the attachment base 3 so that the tooth portion 21 is fitted into the tooth support portion 8 and The battery housing portion 27 formed by the back panel 17 of the fire alarm main body 2 and the bottom portion 45 of the battery housing portion 27 that is in contact with the side surface of the battery to the vicinity of the tooth portion 21 are integrally formed on the back surface. The panel 17 is configured to move the rotation locus in the vertical direction in accordance with the battery storage state of the battery storage unit 27, and the stopper piece 23 that changes the positional relationship with the tooth support portion 8 is formed at the front end in the period from -13 to 201025205. Block member 24. The stopper piece 23 prevents the tooth portion 21 from being fitted into the tooth support portion in a state where the battery is not housed in the battery housing portion 27, and the tooth support portion 8 is positioned on the rotation locus of the stopper piece 23. 8. In a state where the battery is housed in the battery housing portion 27, the rotation trajectory of the stopper piece 23 is moved downward, and the tooth support portion 8 is not positioned on the rotation trajectory, and the tooth portion 21 is made The tooth support portion 8 is embedded. This is because the tooth support portion 8 integrally formed with the mounting base 3 and the tooth portion 21 and the stopper member 24 integrally formed with the back panel 17 of the fire alarm body 2 are configured as a lock-up so that the battery is not mounted. The fire alarm body 2 cannot be attached to the battery lock mechanism of the mounting base 3, so only the parts that do not require the battery lock mechanism are required, and the assembly work of the battery lock mechanism is not required. Further, the fire alarm main body 2 includes the tooth portion 21, and includes the back surface plate 17 having an opening 19 formed directly below the tooth portion 21, and a protective cover 16 covering the back surface plate 17, the protective cover 16 is a state in which the battery is not accommodated in the battery housing portion 27, and when the tooth support portion 8 pushes the stopper piece 23 in the opposite direction to the mounting direction, the restriction is directed toward the stopper piece 23. The restricting rib 22 that moves in the opposite direction to the mounting direction is provided in the opening 19. The protective cover 16 is provided with a detachment preventing surrounding wall 20 corresponding to the opening, and the restricting rib 22 is integrally formed with the detachment preventing surrounding wall 20. In this manner, the lower portion of the stopper piece 23 which is pressed in the opposite direction to the mounting direction by the lower buckle portion 9 of the tooth support portion 8 is provided by the surrounding wall 20 of the protective cover 16 Since the integral restricting rib 22 restricts the movement in the opposite direction to the mounting direction, it is possible to prevent the stopper piece 23 from being pressed in the opposite direction to the mounting direction and being broken when the battery is not attached. Further, the fire alarm main body 2 includes the back panel 17 having the tooth portion 21 and a protective cover 16 covering the back panel 17, and the protective cover 16 is provided with a battery not stored in the battery housing portion. In the state of 27, the stopper piece 23 is restricted from being moved downward, and does not move downward, and the battery is housed in the battery housing portion 27, and the stopper piece 23 is allowed to face. The restricting piece 26 that is inclined while moving downward. The protective cover 16 is provided with a fall prevention surrounding wall 20 corresponding to the opening 19, and the restricting piece 26 is provided integrally with the fall prevention surrounding wall 20. Thus, the stopper piece 23 which is pressed downward by the lower buckle portion 9 of the tooth support portion 8 is formed by the restriction piece 26 which is integral with the surrounding wall 20 of the protective cover 16 provided underneath. The flat portion restricts the movement to the lower side, so that the stopper piece 23 can be prevented from retracting toward the protective cover 16 side, and the fire alarm main body 2 to which the battery is not mounted can be prevented from being erroneously attached to the mounting base 3. Further, the stopper piece 23 is narrowed toward the upper end. It is assumed that the fire alarm main body 2 to which the battery is not mounted is forcibly rotated in the mounting direction due to a design error or the like, and when the tooth portion 21 is fitted into the tooth support portion 8, the tooth portion 21 is chamfered by the side of the tooth portion 21 The sheet 23 is narrowed toward the upper end, and -15-201025205 can be easily removed from the mounting base 3 by rotating the fire alarm body 2 in the removal direction. Next, in order to make the fire alarm main body 2 less likely to be stolen, the fire alarm main body 2 is fixed to the mounting base 3 by a locking screw and a lock nut. When the anti-theft is to be applied, the thin plate portion 11 of the mounting base 3 is first broken to form a notch portion, and then mounted to the mounting portion. Next, the lock nut is inserted between the retaining walls 43 of the nut holding portion 39 of the fire alarm body 2. Then, as described above, the fire alarm body 2 to which the battery is attached is attached to the mounting base 3. Next, the locking screw is inserted from the notch portion of the attachment base 3 and the notch portion 42 of the back panel 17, and is screwed to the lock nut inserted between the holding walls 43. In this case, the head of the locking screw can be fixed by the cutout portion 42. As a result, the head of the locking screw is wrapped around the notch portion of the mounting base 3, and even if the fire alarm body 2 is to be rotated in the direction of removal, the head of the locking screw will abut against the mounting base 3, The fire alarm body 2 can be rotated without being stolen. In the nut holding portion 39 of the present invention, since the two end faces of the lock nut 61 are held by the three-shaped retaining wall 43 having a height equal to or greater than the width of the lock nut 61, the lock screw 62 is locked at When the nut 61 is locked, even if a force of rotation is applied to the locknut 61, it can be held by the retaining wall 43, and the rotation of the locknut 61 can be prevented. Further, since the boss 44' is provided on the wall portion of the retaining wall side of the retaining wall 43 so that the lock nut 61 is locked by the locking screw 62, the locknut 61 can prevent the lock nut 61 from being held from the retaining wall 43. The situation of falling off. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] is a front view and a side view of a fire alarm of a best mode for carrying out the invention. FIG. 2 is a perspective view of the mounting base of FIG. 1. FIG. FIG. 3 is a perspective view of the fire alarm body of FIG. 1. FIG. 〇 [Fig. 4] is a perspective view of the back panel and the protective cover of the fire alarm body of Fig. 3. Fig. 5 is a perspective view showing an enlarged stopper member and a tooth portion. [Main component symbol description] 1 : Fire alarm 2 = Fire alarm main body 3 : Mounting base _ 4 : Base plate 5 : Side plate 6 : Rib 7 : Hole 8 : Tooth support portion 9 : Lower buckle portion 1 〇 : Stop Part 1 1 : Thin plate portion 1 3 : Smoke sensing portion -17- 201025205 1 4 : Control panel 15 : Speaker 16 : Protective cover 1 7 : Back panel 18 : Column 19 : Opening 20 : Surrounding wall 21 : Tooth ❿ 22 : Restricting rib 23: stopper piece 24: stopper member 25: stopper piece supporting portion 2 6 : restriction piece 2 7 : battery accommodating portion 3 0 : intermediate plate 3 1 : side plate © 3 2 : battery connector 33: shift Reporting connector 34, 35: opening 36, 37: guiding projection 38: hole 3 9 : nut holding portion 40 : holding member 41 : machine panel -18 - 201025205 ❿ : cutout portion: holding wall: protrusion: bottom: groove Gap: Cantilever beam: Free end: Reinforcement rib: Guide: Arc-shaped beam: Flat beam: Retraction: Restriction - 19-