201025204 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】 這種火災警報器即能設置在獨棟住宅的火災警報器， 0 是由：安裝在天花板或壁面的安裝基座；與安裝分離自如 地被安裝在安裝基座上，察覺煙或熱等檢測出火災的火災 警報器本體所構成（例如參閱專利文獻1 )。 這種火災警報器，對安裝基座進行火災警報器本體的 安裝’一般是藉著旋轉鎖緊機構來進行。旋轉鎖緊機構， 是由：例如設在火災警報器本體的背面側的齒部、與設在 基座側’承接火災警報器本體的背面側的齒部的齒承部所 構成’並藉著進行齒部與齒承部的位置調整，將火災警報 ® 器本體嵌合在安裝基座，並予以旋轉（相對轉動），將齒 部卡合在齒承部’藉此將火災警報器本體固定在安裝基座 ’又’於旋轉鎖定狀態下，藉著將火災警報器本體相對於 安裝基座’朝與齒部的卡合方向相反方向旋轉的方式，可 解除安裝基座與火災警報器本體的卡合。 〔先前技術文獻〕 〔專利文獻〕 〔專利文獻1〕日本特開2003-099871號公報 201025204 【發明內容】 〔發明所欲解決之課題〕 然而，如前述，藉著火災警報器本體相對於安裝基座 的旋轉，便可簡單進行火災警報器本體的卡合或解除者’ 可能會因地震等造成火災警報器本體的脫落或故意偷竊等 。因此，希望能依需要防止因地震等造成火災警報器本體 的脫落或故意偷竊造成的問題。 本發明的目的是提供—種可依需要可簡易防止因地震 u 等造成火災警報器本體的脫:落或故意偷竊的火災警報器。 〔解決發明用的手段〕 本發明的火災警報器是一種使用鎖固螺絲與防鬆螺母 的螺著構造將可安裝分離地被安裝在被設置於設置面的安 裝基座上的火災警報器本體，固定在上述安裝基座的火災 警報器，其特徵爲，具備有：自上述火災警報器本體的背 面板縱立，並且分別覆蓋包含上述防鬆螺母的側面的兩個 @ 端面的兩個保持壁；被設在上述安裝基座的側板，並且內 包上述鎖固螺絲頭部的切口部；以及上述防鬆螺母的側面 與端面交叉的邊之中，被設置在與上述安裝基座的側板接 近的邊接觸的上述保持壁的邊的上端的突起。 〔發明的效果〕 本發明的火災警報器的效果是防鬆螺母與鎖固螺絲螺 著時，雖會朝火災警報器本體的外周側方向靠近，但由於 -6- 201025204 在保持壁的火災警報器本體外周側方向的壁上端設有突起 ’所以防鬆螺母不會有與突起的卡合解開的情況，且不會 空轉’可與鎖固螺絲進行螺旋。又，保持壁由於其全部是 具有鎖固螺絲的寬幅以上的高度，所以不易空轉。 【實施方式】 〔實施發明用的形態〕 φ 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。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。 此外，本發明的說明是以安裝基座3安裝在天花板， 以天花板的垂直方向作爲上下方向，以天花板側爲上來進 行說明。因此，火災警報器本體2是在與天花板平行的面 〇 內被轉動。 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 警報器1的天花板等的安裝處。而且，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。並且 201025204 ，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;與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1 0。 在側板5設有將厚度作薄的薄板部11，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 q ，彎折去掉薄板部11時成爲內包鎖固螺絲頭部的缺口部 (圖6、圖7的切口部63)。 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，夾持火災感知部的一個例子的煙 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，且 設有將設有與背面板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 〇 板17的開口 19進入影響到煙感知部13、控制板14、揚 聲器15等的功能構件的包圍壁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；與連接兩個側壁部前端側的內側壁部。包 圍壁20可防止螺絲等的異物從開口 19進入時，滯留在包 圍壁20的內側，往保護蓋1 6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 -8 - 201025204 20的側壁部（安裝方向側）的頂部朝背面板17的方向延 伸。限限制肋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被朝與安裝方向的反方向按壓時 不會移動，止擋且可使片支撐部25抵接在限制肋22，而 不會往齒部21的方向移動。該限制肋22是突出設在開口 19內。 φ 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2 0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25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的齒支承部8從正上方按壓著止擋片23時， 由於止擋片支撐部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 -9 - 201025204 座3的情況。 背面板17，具有：圓板狀的中板30、和與中板30外 周抵接的圓筒狀的側板31。 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1 4的電 池用連接器32及安裝在移報用連接器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61的防鬆螺母保持部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不 移送發報的機種的兩種機種，在移報的機器安裝有對控制 Ο 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=1字狀縱立，並且具有分 別覆蓋防鬆螺母的對向兩個端面的一對保持壁43。保持壁 -10- 201025204 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的壁部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 的電池的半圓筒狀側面接觸的底部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 φ 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31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 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 半徑小的圓弧狀的樑51、與從圓弧狀的樑51延伸的平板 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48。 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 -11 - 201025204 側面。此時，由於在側板31的內側面側設有退避部5 3， 所以即使自由端48接近側板31的內側面，也不會與側板 3 1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31 的內側面變形而接近時，止擋片支撐部25會變形使得與 懸臂樑4 7連接的位置成爲最爲下沈的位置，而相反側的 ◎ 下沈則最小。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。因此，一面將火災警報器本體2 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’與齒部21的導引部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 〇 ，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 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位置設 有：齒部21 ;將側板從內側挖薄，當止擋構件24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。 -12- 201025204 齒部21，具有：從面對側板31的安裝基座3側的頂 部之內預定長度的頂部往內側以預定的厚度延伸的導引部 50;與火災警報器本體2朝安裝方向轉動時，齒支承部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54。 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。 φ 由於未安裝電池，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 火災警報器本體2無法在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2 7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 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 -13- 201025204 50嵌入，可將火災警報器本體2安裝到安裝基座3。 本發明的火災警報器，由於是由和安裝基座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 —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，由於藉由齒支承部8的下扣部9朝著與安裝方向 H 的反方向被按壓的止擋片23的下部是藉著與保護蓋16的 包圍壁20設置成爲一體的限制肋22，限制往與安裝方向 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，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16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16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 〇 又，假設即使是因設計誤差等，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，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。 圖6爲本發明一方的保持壁的剖視圖。圖7表示將防 -14- 201025204 鬆螺母插入保持壁，插入鎖固螺絲而予以螺著的樣子圖。 防鬆螺母保持部39是如圖6、圖7詳細表示，具有從 背面板17的中板30縱立，包覆防鬆螺母61的相對兩個 端面的剖面爲略3字狀的兩個保持壁43。而且，保持壁 43不僅包覆防鬆螺母61的端面，並藉著邊也包覆相連的 兩個側面的一部分。 又，在保持壁43設有插入防鬆螺母61時，在從防鬆 Φ 螺母6 1的側板3 1側的側面跨端面的邊的位置的壁的上端 ，朝內側突出的突起44。亦即，保持壁43的突起44被設 在位於火災警報器本體2外周側的壁部上端。 然後，防鬆螺母61是從上方插入兩個保持壁43之間 。此外，面對與防鬆螺母6 1的側板3 1相反側的側面壁的 上端被施予倒角加工，藉著作成些微的傾斜，可容易插入 保持壁43之間。 又，防鬆螺母6 1螺入鎖固螺絲6 2時，抵接在側板3 1 ® 側的保持壁43的壁。此時，由於朝向上方的端面會藏入 突起44之下，所以即使將防鬆螺母61往上拉也不會從保 持壁43之間掉出。 接著說明藉著鎖固螺絲62與防鬆螺母61將火災警報 器本體2固定在安裝基座3的方式，使得火災警報器本體 2在地震時不會落下或者不易被偷。 固定時，拿著前方，以鉗子等的工具類將安裝基座3 的薄板部1 1折斷形成切口部63後，安裝到安裝處。 接著，將防鬆螺母61插入火災警報器本體2的防鬆 -15- 201025204 螺母保持部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，從安裝基座3的切口部63、背面板17的切口 部42插入鎖固螺絲62’而與插入在保持壁43間的防鬆螺 母61螺旋固定。如此一來，鎖固螺絲62的頭部62a會被 切口部42擋住。其結果，鎖固螺絲62的頭部62a被內包 在安裝基座3的切口部63’而即使火災警報器本體2欲朝 卸下的方向轉動，鎖固螺絲62的頭部62a會抵在安裝基 0 座3，使火災警報器本體2不能轉動，而可防止被盜。 又’即使因地震造成火災警報器本體2振動，由於可 藉著鎖固螺絲62與防鬆螺母61固定在安裝基座3，所以 可防止脫落而落下。 本發明的火災警報器1是使用鎖固螺絲62與防鬆螺 母61的螺著構造’將可安裝分離地被安裝於被設置在設 置面的安裝基座3上的火災警報器本體2，固定在上述安 裝基座3的火災警報器1，其中，具備有：自上述火災警 @ 報器本體2的背面板17縱立，並且分別覆蓋包含上述防 鬆螺母上述防鬆螺母61側面的兩個端面的兩個保持壁43 ;被設在上述安裝基座3的側板31，並且內包上述鎖固螺 絲62的頭部62a的切口部63;以及上述防鬆螺母61的側 面與端面交叉的邊之中，被設置在接近上述安裝基座3的 側板31的邊接觸的上述保持壁43邊的上端的突起44。如 此，由於保持壁43在位於火災警報器本體2外周側的壁 部的上端設有突起44，所以防鬆螺母6 1即使以鎖固螺絲 -16- 201025204 62鎖緊，也可防止防鬆螺母61從保持壁43脫落的情況。 又，上述保持壁43高度超過上述防鬆螺母61的寬幅 。在防鬆螺母保持部39中’藉著防鬆螺母61的寬幅以上 高度的3字狀保持壁43，保持防鬆螺母61的兩個端面， 且由於朝下的端面與背面板17接觸’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 φ 旋轉，且不會空轉。 此外，上述的實施形態中’切口部63雖是以鉗子等 的工具類，將安裝基座3的薄壁部11折斷的方式所形成 ，但如圖8所示’將脫模用的切痕Ha設在薄壁部11 ’可 容易將薄壁部11折斷。又，也可從一開始就在安裝基座3 形成切口部63。 【圖式簡單說明】 〇 〔圖1〕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。 〔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。 〔圖6〕爲本發明的一方保持壁的剖視圖。 〔圖7〕表示將防鬆螺母插入保持壁後’插入鎖固螺 -17- 201025204 絲並予以螺著的樣子的圖。 〔圖8〕表示安裝基座的變形例的立體圖 【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 10 :止擋部 1 1 :薄板部 1 3 :煙感知部 1 4 :控制板 1 5 :揚聲器 16 :保護蓋 1 7 :背面板 18 :柱 19 :開口 20 :包圍壁 21 :齒部 -18- 201025204 22 : 23 : 24 : 25 : 26 : 27 : 30 : φ 31 : 32 : 33 : 34、 36、 38 : 39 : 40 : ⑩ 4 1: 42 ： 43 ： 44 ： 45 ： 46 ： 47 ： 4 8 ·· 49 ： 限制肋 止擋片 止擋構件 止擋片支撐部 限制片 電池收納部 中板 側板 電池用連接器 移報用連接器 35 :開口 37 :導引突起 孔 螺母保持部 保持構件 機器面板 切口部 保持壁 突起 底部 槽隙 懸臂樑 自由端 補強用肋 -19 201025204 50 :導引部 51 :圓弧狀的樑 52 :平板狀的樑 53 :退避部 54 :限制部 61 :防鬆螺母 62 :鎖固螺絲 63 :切口部 ❹201025204 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] This kind of fire alarm can be set in a fire alarm in a single-family house, 0 is: a mounting base installed on the ceiling or the wall; it is installed on the mounting base separately from the installation, and the smoke is detected. The fire alarm body is configured to detect a fire such as heat (see, for example, Patent Document 1). Such a fire alarm, the mounting of the fire alarm body to the mounting base is generally performed by a rotary locking mechanism. The rotary locking mechanism is composed of, for example, a tooth portion provided on the back side of the fire alarm main body and a tooth receiving portion provided on the base side to receive the tooth portion on the back side of the fire alarm main body. The position of the tooth portion and the tooth receiving portion is adjusted, and the fire alarming device body is fitted to the mounting base, and is rotated (relatively rotated), and the tooth portion is engaged with the tooth receiving portion to fix the fire alarm body The mounting base and the fire alarm body can be released by rotating the fire alarm body relative to the mounting base 'in a direction opposite to the engagement direction of the tooth portion in the rotation lock state. The snapping. [PRIOR ART DOCUMENT] [Patent Document 1] [Patent Document 1] JP-A-2003-099871 (2010) [Abstract] [Problems to be Solved by the Invention] However, as described above, the body of the fire alarm is opposed to the mounting base. The rotation of the seat makes it easy to engage or disarm the fire alarm body. The fire alarm body may be detached or intentionally stolen due to an earthquake. Therefore, it is desirable to prevent problems caused by the fall of the fire alarm body or intentional theft due to an earthquake or the like as needed. SUMMARY OF THE INVENTION An object of the present invention is to provide a fire alarm that can easily prevent a fire alarm body from being detached or intentionally stolen due to an earthquake or the like as needed. [Means for Solving the Invention] The fire alarm of the present invention is a fire alarm body that can be mounted separately and mounted on a mounting base provided on a setting surface using a screwing structure of a locking screw and a locknut A fire alarm fixed to the mounting base, characterized in that: the two are held from the back panel of the fire alarm body and cover two sides of the side surface of the lock nut, respectively. a wall; a side plate provided on the mounting base; and a cutout portion enclosing the locking screw head; and a side surface of the lock nut that intersects the end surface, and is disposed on a side plate of the mounting base The adjacent side contacts the protrusion of the upper end of the side of the holding wall. [Effects of the Invention] The fire alarm of the present invention has an effect that the lock nut is close to the outer peripheral side of the fire alarm body when the lock nut and the lock screw are screwed, but the fire alarm of the retaining wall is -6-201025204. The upper end of the wall in the outer circumferential direction of the device is provided with a protrusion 'so that the lock nut does not have a snap-off with the protrusion, and does not vacate' can be spiraled with the locking screw. Further, since the retaining walls are all wider than the width of the locking screw, they are not easily idling. [Embodiment] [Embodiment for Carrying Out the Invention] Fig. 1 is a front view and a side view of a fire alarm which is the 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. Further, the description of the present invention is such that the mounting base 3 is attached to the ceiling, and the vertical direction of the ceiling is referred to as the vertical direction, and the ceiling side is referred to as the upper side. Therefore, the fire alarm body 2 is rotated in a plane parallel to the ceiling. The fire alarm 1 of the best mode for carrying out the present invention is provided with a fire alarm main 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 alarm 1 is attached by a mounting member such as a screw. Further, as shown in Fig. 2, the mounting base 3 has a cylinder having a low bottom height and has a disk-shaped bottom plate 4 and a cylindrical side plate 5. In the bottom plate 4, the rib 6 concentric with 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. And 201025204, 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 bottom buckle portion 9 having a predetermined gap; and a direction for mounting the fire base body 2 in the mounting base 3 (hereinafter referred to as mounting) The direction of rotation, when positioned at a predetermined position, blocks the stop stop 10 of the further rotation of the fire alarm body 2. The side plate 5 is provided with a thin plate portion 11 having a thin thickness. When the fire alarm body 2 and the mounting base 3 are fixed by the locking screw and the lock nut, the side plate 5 is bent. When the thin plate portion 11 is bent and removed, the inner bag is locked. The notch portion of the screw head (the notch portion 63 of Figs. 6 and 7). As shown in FIG. 3 and FIG. 4, the fire alarm main body 2 is a smoke sensing unit 13 that controls an example of the fire sensing unit by the screwing of the protective cover 16 and the back panel 17, and the control panel 1 and the speaker 1 5 functional components. The protective cover 16 is formed of a funnel shape by the bottom plate 16a and the side plate 16b, and is provided with a column 18 and a back plate 17 which are provided with screw holes for screwing the back plate 17, and surrounds and closes the opening 19 so that foreign matter does not occur. The surrounding wall 20 that affects the functional members of the smoke sensing portion 13, the control panel 14, the speaker 15, and the like is entered from the opening 19 provided in the back seesaw 17. The surrounding wall 20 has two side wall portions extending in a direction slightly orthogonal from the side plate 16b, and an inner side wall portion connecting the front end sides of the two side wall portions. The wrap wall 20 prevents the foreign matter such as a screw from entering the inside of the wrap 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 -8 - 201025204 20 which is located immediately below the tooth portion 21 of the back panel 17 extends in the direction of the back panel 17. The limiting 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 made to be in the mounting direction by the lower buckle portion 9 of the tooth supporting portion 8. When it is pressed in the reverse direction, it does not move, and the stopper can cause the sheet supporting portion 25 to abut against the regulating rib 22 without moving in the direction of the tooth portion 21. The restricting rib 22 is projecting in the opening 19. φ Further, in the surrounding wall 20, the restricting 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 where the restricting rib 22 is provided in a direction slightly orthogonal to the side wall portion, and the front end portion of the mounting direction side is connected to the side wall portion of the surrounding wall 20 Strengthened by the same wall. When the restricting piece 26 is superposed on the back plate 17, it is positioned directly below the stopper supporting portion 25 of the stopper member 24, and its top portion faces the mounting direction, is flat on the rear side, and is inclined on the front side. The stopper piece supporting portion 25 is inclined when the battery is mounted in the battery housing portion 27, and is tilted toward the rotational direction (mounting direction). The front side is lowered. Therefore, the top of the restricting piece 26 is chamfered to allow the deformed portion to retract. On the other hand, when the battery is not attached to the battery storage unit 27, when the tooth support portion 8 of the attachment base 3 presses the stopper piece 23 from directly above, the stopper piece support portion 25 abuts against the restriction piece 26 The flat portion of the top portion is not depressed. When the fire alarm body 2 is rotated in the mounting direction, the stopper piece 23 is locked by the lower buckle portion 9 of the tooth support portion 8 of the mounting base 3. The way, without further rotation, prevents the accidental installation of the fire alarm body 2 without the battery installed to the mounting base-9 - 201025204. 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 mounted on the control board 14 and to the connection for reporting. a guide projection 36 for guiding the machine panel 41 to the pasting position (an example of the adhesive guide) 36, 37; and a hole 38 opposite to the post 1 of the screw hole of the protective cover 16; holding the anti-slip nut 61 a lock nut holding portion 39; a battery accommodating portion 27 recessed in a semi-cylindrical shape on the side of the protective cover 16; and a holding member 40 that holds the battery so that the battery does not fall from the mounting position when the battery is mounted on the battery accommodating portion 27; Further, when the battery is attached to the battery housing portion 27, the stopper member 24 that is retracted to the stopper piece 23 that does not reach the position of the lower fastening portion 9 of the tooth support portion 8 of the attachment base 3 is formed. The fire alarm 1 includes two types of models for transferring the report to the external device and the model for not transmitting the report, and the connector 33 for the control 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 inserted into the inner side of the slit portion 42' of the side plate 31 and inserted into the inner side with the lock screw. Further, the nut holding portion 39 is a pair of holding walls 43 which are longitudinally drawn from the intermediate plate 30 in the shape of a cross section and have a pair of opposing end faces which are respectively covered with the lock nut. Holding wall -10- 201025204 43 is the height above the width of the locknut used. Further, the holding wall 43 is provided with a projection 44 at which the lock nut cannot be easily detached from the upper end of the wall portion into which the lock nut can be inserted. 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 27, and two slits 46 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 φ of the cantilever beam 47 toward the axial direction of the battery housing portion 27, and the stopper piece supporting portion 25 A stop piece 23 standing along the side plate 31. A reinforcing rib 49 is provided on the stopper piece 23. The stopper piece 23 is in the direction in which the fire alarm body 2 is rotated when the battery is not attached to the battery storage portion 27 (hereinafter referred to as when no battery is attached) when the fire alarm body 2 is attached to the attachment base 3 (hereinafter In addition, 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 a direction of removal. ® ), guidance at the tooth portion 21 The front side of the portion 50 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 beam 52 extending from the arc-shaped beam 51. The opposite ends of the connecting ends of the arcuate beams 51 of the flat beam 52 are free ends 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. 31's inside -11 - 201025204 side. 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. Next, 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 to approach. It becomes the most sinking position, while the ◎ sinking on the opposite side is the smallest. Therefore, the stopper piece 23 is in the mounting direction downward, and is inclined toward the protective cover 16 while being inclined. 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 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 guide portion 50 of the tooth portion 21. Since the guide portion 50 of the tooth portion 21 is fitted between the two, the fire alarm body 2 can be prevented 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 lower buckle portion 9 of the tooth support portion 8 is wide, the smooth start can be started. Rotate in the ground. The side plate 3 1 is provided with a tooth portion 21 at a diagonal position centering on the center of the intermediate plate 30; a side plate is thinned from the inside, and when the stopper member 24 is deformed, a backing portion that does not hinder the movement is formed. 53; and a notch portion 42 of the locking screw that can stop the rotation of the fire alarm body 2. -12- 201025204 The tooth portion 21 has a guide portion 50 extending from a top portion of a predetermined length toward the inner side in a top portion of the side of the mounting base 3 facing the side plate 31, and a predetermined thickness; and the fire alarm body 2 is mounted When the direction is rotated, the lower buckle portion 9 of the tooth support portion 8 abuts to restrict the restriction portion 54 in which the fire alarm body 2 is further rotated. 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. φ Since the battery is not mounted, the force is not applied to the cantilever beam 47 of the stopper member 24, so that the top of the stopper piece 23 is positioned above the lower buckle portion 9 of the tooth support portion 8 of the attachment base 3, and the fire alarm body 2 is When the rotation is made in the mounting direction, 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 receiving 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 while sinking in the direction approaching the protective cover 16. It is close to the inner side of the side panel 31. 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 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-13-201025204 50 is embedded to mount the fire alarm body 2 to the mounting base 3. The fire alarm of the present invention is constituted by a tooth support portion 8 integrally formed with the attachment base 3, and a tooth portion 21 and a stopper member 24 formed integrally with the back panel 17 of the fire alarm body 2 as a lock. The fire alarm body 2 that is installed so that the battery is not installed cannot be attached to the battery lock mechanism of the mounting base 3, so that only the parts of the battery lock mechanism are not required, and the assembly work of the battery lock mechanism is not required. Further, since the lower portion of the stopper piece 23 which is pressed in the opposite direction to the mounting direction H by the lower buckle portion 9 of the tooth support portion 8 is a restriction rib 22 which is integrally provided with the surrounding wall 20 of the protective cover 16. Since the movement in the opposite direction to the mounting direction is restricted, 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 mounted. Further, the stopper piece 23 pressed by the lower buckle portion 9 of the tooth support portion 8 in the downward direction is flattened at the top of the restriction piece 26 due to the integral with the surrounding wall 20 of the protective cover 16 provided on the lower side thereof. In part, the movement to the lower side is restricted, so that the stopper piece 23 can be prevented from retracting toward the side of the protective cover 16, and the case where the fire alarm body 2, which is not mounted, is accidentally attached to the mounting base 3 can be prevented, and even if it is When the fire alarm main body 2 to which the battery is not attached is forcibly rotated in the mounting direction due to a design error or the like, and the tooth portion 21 is fitted into the tooth support portion 8, the stopper portion is made to be chamfered by the tooth portion 21 side. Since the width 23 is narrowed toward the upper end, it can be easily removed from the attachment base 3 by rotating the fire alarm main body 2 in the removal direction. Figure 6 is a cross-sectional view of one of the retaining walls of the present invention. Fig. 7 is a view showing a state in which the anti-14-201025204 loose nut is inserted into the holding wall and the locking screw is inserted and screwed. The locknut retaining portion 39 is shown in detail in FIGS. 6 and 7, and has two retaining portions which are longitudinally formed from the intermediate plate 30 of the back panel 17, and which have a substantially three-shaped cross section of the opposite end faces of the covering lock nut 61. Wall 43. Moreover, the retaining wall 43 not only covers the end faces of the locknuts 61 but also covers a part of the joined side faces by the sides. Further, when the retaining wall 43 is provided with the insertion lock nut 61, the projection 44 that protrudes inward from the upper end of the wall from the side of the side plate 3 1 side of the lock preventing Φ nut 6 1 at the side of the end surface. That is, the projection 44 of the retaining wall 43 is provided at the upper end of the wall portion on the outer peripheral side of the fire alarm body 2. Then, the locknut 61 is inserted between the two holding walls 43 from above. Further, the upper end of the side wall facing the side opposite to the side plate 3 1 of the locknut 61 is subjected to chamfering, and can be easily inserted between the retaining walls 43 by a slight inclination. Further, when the lock nut 6 1 is screwed into the lock screw 6 2, it abuts against the wall of the retaining wall 43 on the side plate 3 1 ® side. At this time, since the upwardly facing end faces are hidden under the projections 44, even if the locknuts 61 are pulled up, they do not fall out from between the retaining walls 43. Next, the manner in which the fire alarm body 2 is fixed to the mounting base 3 by the locking screw 62 and the locknut 61 will be described so that the fire alarm body 2 does not fall or is not easily stolen during an earthquake. At the time of fixing, the front side is held, and the thin plate portion 1 1 of the mounting base 3 is broken by a tool such as a pliers to form the notch portion 63, and then attached to the mounting portion. Next, the locknut 61 is inserted between the retaining walls 43 of the nut retaining portion 39 of the fire alarm body 2 of the lock -15-201025204. Then, as described above, the fire alarm body 2 to which the battery is attached is attached to the mounting base 3. Then, the locking screw 62' is inserted from the notch portion 63 of the attachment base 3 and the notch portion 42 of the back panel 17, and is screwed to the anti-loose nut 61 inserted between the holding walls 43. As a result, the head portion 62a of the locking screw 62 is blocked by the cutout portion 42. As a result, the head portion 62a of the locking screw 62 is wrapped around the notch portion 63' of the attachment base 3, and even if the fire alarm body 2 is to be rotated in the direction of removal, the head 62a of the locking screw 62 is abutted. The base 0 of the base is installed so that the fire alarm body 2 cannot be rotated, and theft can be prevented. Further, even if the fire alarm main body 2 vibrates due to an earthquake, it can be fixed to the attachment base 3 by the lock screw 62 and the lock nut 61, so that it can be prevented from falling off and falling. The fire alarm 1 of the present invention is a fire alarm body 2 that is detachably attached to the mounting base 3 provided on the installation surface using a screwing structure of the locking screw 62 and the lock nut 61, and is fixed. The fire alarm 1 of the above-described mounting base 3 is provided with: a rear panel 17 from the fire alarm body 2 is provided, and each of the two sides of the lock nut 61 including the lock nut is covered. Two retaining walls 43 of the end face; a cutout portion 63 provided on the side plate 31 of the mounting base 3 and enclosing the head 62a of the locking screw 62; and a side where the side surface of the lock nut 61 intersects the end surface Among them, the protrusion 44 provided at the upper end of the side of the holding wall 43 which is in contact with the side of the side plate 31 of the mounting base 3 is provided. Thus, since the retaining wall 43 is provided with the projection 44 at the upper end of the wall portion on the outer peripheral side of the fire alarm body 2, the locknut 6 1 can be prevented from being loosened even by the locking screw - 16 - 201025204 62 The case where the 61 is detached from the holding wall 43. Further, the height of the retaining wall 43 exceeds the width of the lock nut 61. In the locknut holding portion 39, 'the three end faces of the lock nut 61 are held by the width of the lock nut 61, and the two end faces of the lock nut 61 are held, and the downward end face is in contact with the back plate 17' Therefore, when the locking screw 62 is locked to the locknut 61, even if a rotational force is applied to the locknut 61, it can be held by the retaining wall 43 and the φ rotation of the locknut 61 can be prevented without Idle. In the above-described embodiment, the notched portion 63 is formed by means of a tool such as a forceps, and the thin portion 11 of the attachment base 3 is broken. However, as shown in Fig. 8, the cut for the mold release is used. Ha is provided in the thin portion 11' to easily break the thin portion 11. Further, the cutout portion 63 may be formed on the mounting base 3 from the beginning. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] Front and side views of a fire alarm of the 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. 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 an enlarged perspective view showing a stopper member and a tooth portion of the present invention. Fig. 6 is a cross-sectional view showing a retaining wall of the present invention. Fig. 7 is a view showing a state in which a lock nut is inserted into a retaining wall and a lock screw -17-201025204 is inserted and screwed. Fig. 8 is a perspective view showing a modification of the attachment base. [Main component symbol description] 1 : Fire alarm 2 : Fire alarm body 3 : Mounting base 4 : Base plate 5 : Side plate 6 : Rib 7 : Hole 8 : Teeth Support portion 9: lower buckle portion 10: stopper portion 1 1 : thin plate portion 1 3 : smoke sensing portion 1 4 : control panel 1 5 : speaker 16 : protective cover 1 7 : back panel 18 : column 19 : opening 20 : surrounded Wall 21: Tooth -18- 201025204 22 : 23 : 24 : 25 : 26 : 27 : 30 : φ 31 : 32 : 33 : 34 , 36 , 38 : 39 : 40 : 10 4 1: 42 : 43 : 44 : 45 : 46 : 47 : 4 8 · · 49 : Restricted rib stopper stopper member stopper piece support portion restriction piece battery accommodation portion middle plate side battery connector connector for reporting connector 35 : opening 37 : guide projection Hole nut holding portion holding member machine panel cutout portion holding wall projection bottom groove cantilever beam free end reinforcing rib 19 201025204 50 : guiding portion 51: arc-shaped beam 52: flat beam 53 : retracting portion 54 : Restriction portion 61: Lock nut 62: Locking screw 63: Notched portion ❹
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