201200057 六、發明說明： 【發明所屬之技術領域】 本發明是關於一種，操作正面部分可解除卡合的前釋 放型帶扣。 【先前技術】 以往，在衣服、皮包或鞋子、包裝具等的各種的用途 ’爲了連結帶子等的繩狀構件彼此，因此使用使插頭與插 座裝脫自如地卡合的帶扣。 這類的帶扣’裝脫用的操作簡單，另一方面，卻被要 求在無意識的情況，不會突然脫落。作爲合乎這類的要求 產品，有利用操作正面部分可解除卡合的前釋放型帶扣。 前釋放型帶扣中，已知有插頭部分與插座部分各自卡 合並被固定的形式者。 例如，在專利文獻1，記載有插頭部分的凸狀的卡合 部的閉鎖突榫，朝扁平形狀的帶扣的厚度方向突出的帶扣 〇 在專利文獻2，記載有在插頭的前端與插座卡合的第 1凸部朝扁平形狀的帶扣的厚度方向突出的帶扣。 [先行技術文獻] [專利文獻] [專利文獻1]日本特許第3248104號 [專利文獻2]日本特開2006 - 2046 1 9號公報 201200057 【發明內容】 [發明所欲解決之課題] 在專利文獻1及專利文獻2記載的帶扣，由於閉 榫朝帶扣的厚度方向突出，所以帶扣的厚度尺寸變的 。因此，例如將這類的帶扣利用在帆布背包等的時候 爲帶扣的厚度大，所以會有所謂安裝位置受到限制、 帆布背包整體的設計性造成不好的影響的問題產生。 於此，本發明的目的在提供一種，可將厚度尺寸 在最小的前釋放型帶扣。 [解決課題用的手段] 本發明的前釋放型帶扣，其特徵爲，具備有：插 插入該插頭並予以卡合的插座，前述插頭具有：基部 前述基部突起的腳部；以及形成在前述腳部的卡合部 述插座具有：具插入口的本體；可收容從形成在前述 内的前述插入口被插入前述腳部的收容空間；形成在 本體，可卡合前述卡合部的被卡合部；以及使前述卡 與前述被卡合部的卡合脫離的操作部，前述插頭與前 座爲扁平形狀，前述腳部是扁平且在厚度方向具有可 ’前述卡合部與前述被卡合部在前述厚度方向卡合， 卡合部在前述腳部的寬方向突出，且被設置在前述腳 厚度範圍内。 在這樣的發明，由於插頭的卡合部並不是在厚度 突出’而是在寬方向突出，所以可縮小收容插頭及卡 鎖突 更大 ，因 或對 抑制 頭： :從 、6 ，刖 本體 前述 合部 述插 撓性 前述 部的 方向 合部 -6- 201200057 的插座的厚度尺寸。因此，帶扣的厚度尺寸不會有變大的 情形，可縮小厚度尺寸。例如，將這類的厚度尺寸小的前 釋放型帶扣利用在帆布背包等的時候，由於帶扣的厚度小 ’所以安裝位置不會受到限制。再者，由於厚度尺寸小， 所以帶扣不會太顯眼’不會發生卡住的情形，且對於帆布 背包等的整體的設計性不會造成不好的影響。 在本發明’在卡合前述插頭與前述插座的狀態下，前 述操作部與前述卡合部被配置呈可抵接，前述操作部在厚 度方向被設在與前述腳部對向的位置，在前述厚度方向具 有可撓性，並且，在前述插座内側具有凸部爲理想。 在這樣的發明，使操作部朝卡合部側彎曲，可將凸部 按壓朝腳部。此時，由於可解除卡合部與被卡合部的卡合 ，所以可將腳部往插座的插入口側推出。 在本發明’前述卡合部是在前述操作部側設有傾斜面 的傾斜部，因前述操作部朝前述卡合部側彎曲，而使前述 凸部按壓前述傾斜面爲理想。 在這樣的發明，使操作部朝卡合部側彎曲，可將凸部 朝傾斜面按壓。此時，由於凸部一面在傾斜面滑行一面往 卡合部側撓曲，所以，解除了卡合部與被卡合部的卡合， 並且被往插座的插入口側推出。因此，按壓操作部，插頭 會從插座分離並被推出。因此，只要按壓操作部，便可確 實分離插頭與插座。 在本發明，前述傾斜面的角度是1 5°爲理想。 在這樣的發明，由於傾斜面的角度是1 5 °，所以凸部 201200057 可在傾斜面圓滑地滑行。因此’按壓操作部，可使插頭從 插座分離，並圓滑地被推出。因此，只要按壓操作部，便 可更確實分離插頭與插座。 在本發明，具有定位從前述基部突起的前述插頭與前 述插座並予以保持的一對的保持部爲理想。 在這樣的發明，由於具有定位插頭與插座並予以保持 的一對的保持部，所以可確實進行卡合部與被卡合部的卡 合。又，例如對插頭與插座施加扭轉應力之後，由於插頭 與插座不會位置偏移，所以不會有解除卡合部與被卡合部 的卡合的虞慮，可確實維持卡合，並發揮作爲帶扣的功能 在本發明， 前述腳部是以愈朝向該腳部的插入方向，以愈往前述 操作部側接近的方式傾斜突出爲理想。 在這樣的發明，由於使腳部從基部比保持部更朝向操 作部側突出，所以按壓操作部之後，只要稍微彎曲便可按 壓卡合部。因此，即使縮小前釋放型帶扣的厚度尺寸，也 可進行操作部所爲之插頭與插座的分離、推出。因此，可 胃進一步縮小前釋放型帶扣的厚度尺寸。 【實施方式】 [實施發明用的形態] 以下，依據圖面說明本發明的實施形態。 在豳1至圖1 2表示本發明的一實施形態。 -8- 201200057 根據圖1至圖3，針對前釋放型帶扣的整體構成進行 説明。 圖1表示本發明的一實施形態的整體構成的俯視圖。 圖2表示前述實施形態的整體構成的側視圖。圖3表示前 述實施形態的整體構成的前視圖。 如圖1至圖3的各圖所示，本實施形態的前釋放型帶 扣1具備：插頭10;插入該插頭10並予以卡合的插座20 〇 如該等的各圖所示，本實施形態的前釋放型帶扣1是 連結/分離繩狀構件，例如連結/分離帶子等的端部用者， 且具備有··由合成樹脂一體成型的插頭10;與同様由合 成樹脂一體成型的插座2 0。 此外，作爲插頭10及插座20的材質，並不限於合成 樹脂，也可爲金屬等的其他的材質，且不限於射出成形， 也可由光造形、纟S造等的其他的成形方法所形成。 依據圖4及圖5，針對插頭的構成進行説明。 圖4表示前述實施形態的插頭的俯視圖。圖5表示前 述實施形態的插頭的側視圖。 依據圖4及圖5中，插頭1〇是藉由合成樹脂的射出 成形將整體一體成型者’並具有：有一對的腳部12的基 部11:分別形成在腳部12的卡合部14;以及插通帶子等 的帶子安裝部1 9。 腳部12是被做成與基部11的寬方向（相對於插座 的插頭10的插入方向及與插座20的厚度方向分別正 -9- 20 201200057 交的方向，圖1的左右方向）並列，朝長方向（相對於插 座20的插頭10的插入方向，圖1的上下方向）延伸，且 相互平行，各自爲中間或前端側可互相往厚度方向（分別 與前述的寬方向及插入方向正交的方向）彈性變形。 又，一對的腳部1 2是以分別愈朝向插入方向愈往操 作部27A側接近的方式傾斜，藉此，可在腳部12的整體 承受往厚度方向的彈性變形的力量。 卡合部14是由從腳部12的前端各自朝寬方向延伸的 突起所形成，各腳部1 2的前端，從平面觀看時形成丁字 狀。又，卡合部14是被形成在腳部12的前端部，卡合部 14的厚度方向的尺寸（高度）是以不會比腳部12的高度 更大的方式被形成。 再者，卡合部14具備有：被形成在各個腳部12的前 端部的傾斜部1 4B :以及在寬方向連結該等的傾斜部1 4B 的連結傾斜部1 4D。一對的腳部1 2是藉由該連結傾斜部 1 4D限制因外力往寬方向的變形。再者，一對的腳部1 2 往厚度方向彈性變形之際，因連結傾斜部1 4D，使各個腳 部1 2同樣的變形量。 又，傾斜部1 4B及連結傾斜部1 4D分別具備有：厚 度尺寸朝向插入方向的前端側變小的緩和的傾斜的傾斜面 14A ;與連結傾斜面14C。 如圖5所示，在一對的腳部12的外側，設置有一對 的保持部1 6。一對的保持部1 6是分別從基部1 1朝向寬 方向分離而被配置，且是朝插入方向延伸的柱狀的構件， -10- 201200057 其前端與卡合部14分離。該保持部16的厚度尺寸比 1 1的厚度尺寸更小，且比腳部1 2的厚度尺寸形成的 〇 又，保持部〗6是具有沿著其寬方向外側設置的 的保持凸部16A。 該等的卡合部14及保持部16，是由被形成在插丨 的内側的凹凸形狀（後述）所引導，並藉由該等的引 在進行插入操作之際’形成將插頭1 0誘導到適當的 〇 又，如圖4所示，帶子安裝部19是利用基部11 間部分所形成。該帶子安裝部1 9是具有可將帶子的 插入到内部中央的帶子安裝孔19A，在插頭10的端 且在位於基部Π的端部的位置，架設有往寬方向延 第1橫桿1 9 B，在帶子安裝孔1 9 A的中間架設有第2 19C，藉由該第2橫桿19C，帶子安裝孔19A被分割 入方向前端側1 9 D與插入方向後端側1 9 E的兩端側。 藉此，使未圖示的帶子插通到帶子安裝孔19A， 第2橫桿1 9C的周圍，使帶子與第1橫桿19B抵接 此形成卡合帶子，並可固定且也可調節長度的構造。 根據圖1及圖6至圖8，針對插座的構成進行說E 圖6表示前述實施形態的插座的俯視圖。圖7表 述實施形態的插座的側視圖。圖8爲前述實施形態的 的前視圖。 圖1及圖6至圖8中，插座20是藉由合成樹脂 基部 更大 凸狀 ^ 20 導， 位置 的中 端部 部， 伸的 橫桿 成插 繞過 ，藉 月。 不刖 插座 的射 -11 - 201200057 出成形而使整體一體成型者，且具有：具插入口 22的 空筒狀的本體21;被形成在該本體21内，可收容從插 口 22被插入的插頭1〇的腳部12的收容空間23;被形 在本體21，卡合部14可卡合的被卡合部24;被形成在 體21的平面中央的操作用開口 27;與插頭卡合時，被 成在與卡合部對應的位置的開口部28;以及可插通未 示的帶子的帶子安裝部29。 被卡合部24是具有朝向被形成在與收容空間23的 側的寬方向分離並列的兩處的插入口 2 2側的傾斜面的 形狀構件。每各被卡合部24是被形成在本體21的表面 内側，在收容空間2 3突出。 該等的被卡合部24的厚度尺寸，是比收容空間23 厚度方向的尺寸形成的更小，並與被形成在一對的腳 12的卡合部14對應。 在收容空間2 3的内側形成有將卡合部1 4往被卡合 24誘導並予以卡合用的誘導面25。 該誘導面25形成有從插入口 22的端部朝向插入方 的複數個一對的溝部26。該構部26是作爲從插入口 插入腳部1 2及保持部1 6之際’使被形成在未圖示的腳 12的裏面側的凸狀部與溝部26對應，將腳部12的前 的卡合部1 4誘導到被卡合部24的導引發揮功能。 根據圖9’針對插座的操作部的構成進行説明。 圖9表不前述施形態的插座的操作部的剖面圖。 如圖9所示，爲了解除卡合部14與被卡合部24的 中 入 成 本 形 圖 内 楔 的 的 部 部 向 22 部 端 卡 -12- 201200057 合，在本體21的平面中央形成有操作用開口 27。 用開口 27與内部的收容空間23連通。 操作用開口 27是被形成在使連結從插入口 22 的腳部1 2的連結傾斜部1 4 D露出的位置。 在該操作用開口 27，設有藉由按壓往厚度方 性的可撓性構件之操作部27A。該操作部27A被設 腳部1 2對向的位置，因彈性變形而形成與連結 14D抵接。並且在操作部27A設有在與連結傾斜 抵接之處，往厚度方向内側突出的凸部27B，並在 部2 7 B對應的位置設有位在厚度方向外側的厚肉部 根據圖9至圖12，說明連結插頭與插座的様 及已連結的狀態及解除已連結的插頭與插座的卡合 〇 圖1 0表示前述實施形態的插頭及插座的連結 剖面圖。圖1 1表示前述實施形態的插頭及插座的 中的狀態的剖面圖。圖1 2表示藉由前述實施形態 部的彎曲，推出卡合部的狀態的放大剖面圖。 如圖9及圖11所示’在從插入口 22被插入 12的前端，當卡合部14被誘導到誘導面25，來到 部24時，一對的腳部1彈性變形，一對的卡合部] 與被卡合部24卡合。 另一方面，如圖1〇及圖12所示，凸部27B按 傾斜部1 4D，而使腳部1 2往厚度方向彈性變形的 在連結傾斜面1 4C的斜面滑行。藉此，解除卡合部 該操作 被插入 向的彈 置在與 傾斜部 部1 4D 與該凸 27C。 子；以 的様子 狀態的 連結途 的操作 的腳部 被卡合 4分別 壓連結 同時， 14與 -13- 201200057 被卡合部24的卡合，而將插頭1 〇往插入口 22側推出。 在這樣的本實施形態中，可獲得以下這類的效果。 在本實施形態的前釋放型帶扣1，插頭1 0的卡合部 14並不是在厚度方向突出，而是在寬方向突出，所以帶 扣的厚度尺寸不會有變大的情形，且可縮小厚度尺寸。因 此’例如’將這類的厚度尺寸小的前釋放型帶扣1利用在 帆布背包等的時候，由於帶扣的厚度小，所以安裝位置不 會受到限制。再者，由於厚度尺寸小，所以，帶扣不會太 顯眼、且對於帆布背包等的整體的設計性不會造成不好的 影響。 本實施形態的前釋放型帶扣1中，操作部27Α朝卡 合部14側彎曲，使凸部27Β按壓連結傾斜面14C。此時 ，由於凸部27Β —面在連結傾斜面1 4C滑走，一面往卡 合部1 4側彎曲，所以解除了卡合部1 4與被卡合部24的 卡合，並且，往插座2 0的插入口 2 2側被推出。因此，只 要按壓操作部27Α，使插頭10從插座20分離而被推出。 藉此，只要按壓操作部27Α，便可確實分離插頭1〇與插 座20。 本贲施形態的前釋放型帶扣1中’由於連結傾斜面 1 4 C的角度是1 5 °，所以凸部2 7 Β可在連結傾斜面1 4 C圓 滑地滑走。因此，按壓操作部2 7 Α ’便可使插頭1 0從插 座20分離，並圓滑地被推出。藉此’只要按壓操作部 27Α，可更確實分離插頭10與插座20。 本實施形態的前釋放型帶扣1中’由於具有定位插頭 -14- 201200057 ίο與插座20並予以保持的一對的保持部16，所以可確實 進行卡合部14與被卡合部24的卡合。又，例如對插頭 1 0與插座2 0施加扭轉應力之際，由於插頭1 0與插座2 0 不會位置偏移，所以不會有解除卡合部14與被卡合部24 的卡合的虞慮，可確實發揮作爲帶扣的功能。 本實施形態的前釋放型帶扣1中，由於腳部1 2比保 持部1 6更從基部1 1往操作部2 7 A側突出，所以按壓操 作部27A之際，稍微的彎曲便可按壓卡合部1 4。因此， 即使前釋放型帶扣1的厚度尺寸小，也可藉由操作部27A 進行插頭1 〇與插座2 0的分離、推出。藉此，可將前釋放 型帶扣1的厚度尺寸做的更小。 〔變形例〕 此外，本發明並不限於前述實施形態的構造，也包含 有接下來的變形。 如上述實施形態，一對的腳部1 2並不限於在連結傾 斜部1 4D被連結的構造，如圖1 3所示，也可作成不連結 的獨立的構造。又，這類的情況，藉由加大凸部27B的寬 幅尺寸，來按壓傾斜面1 4A爲理想。 又，卡合部14不限於由從腳部12的前端各自朝寬方 向外側延伸的突起所形成的構造，如圖1 4所示，也可作 成朝寬方向内側延伸的突起，傾斜部1 4B也可不是設在插 入方向前端側，而是被設在相反側的構造。 再者，卡合部14不需要形成L字狀，也可如圖15所 -15- 201200057 示’也可作成1個卡合部14。 又，腳部12並不一定要作成一對，也可如圖16所示 由三個腳部1 2所構成。 [產業上的可利用性] 本發明是連結帶子彼此的帶扣，可作成具有一對的止 動臂的前釋放型帶扣來利用。 【圖式簡單說明】 [圖1 ]表示本發明的一實施形態的整體構成的俯視圖 〇 [圖2 ]表示前述實施形態的整體構成的側視圖。 [圖3 ]表示前述實施形態的整體構成的前視圖。 [圖4]表示前述實施形態的插頭的俯視圖。 [圖5]表示前述實施形態的插頭的側視圖。 [圖6]表示前述實施形態的插座的俯視圖。 [圖7]表示前述實施形態的插座的側視圖。 [圖8]前述Η施形態的插座的前視圖。 [圖9]表示前述實施形態的插座的操作部的剖面圖。 [圖10]表示前述實施形態的插頭及插座的連結狀態的 剖面圖。 [圖1 1 ]表示前述實施形態的插頭及插座的連結途中的 狀態的剖面圖。 [圖12]表示藉由前述實施形態的操作部的彎曲，推出 -16- 201200057 卡合部的狀態的放大剖面圖。 [圖1 3 ]表示本發明的其他的實施形態的插頭的俯視圖 〇 [圖1 4]表示本發明的其他的實施形態的插頭的俯視圖 〇 [圖1 5 ]表示本發明的其他的實施形態的插頭的俯視圖 〇 [圖1 6 ]表示本發明的其他的實施形態的插頭的俯視圖 【主要元件符號說明】 I :前釋放型帶扣 10 :插頭 II :基部 1 2 :腳部 14 :卡合部 1 4 A :傾斜面 14B :傾斜部 1 6 :保持部 20 :插座 21 :本體 22 :插入口 2 3 :收容空間 24 .被卡合部 -17- 201200057 2 7 A :操作部 2 7 B :凸部201200057 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a front release type buckle that operates a front portion to be disengageable. [Prior Art] In the past, various applications such as clothes, purses, shoes, and packaging materials have been used. In order to connect the rope members such as the straps, a buckle that detachably engages the plug and the socket is used. This type of buckle is easy to handle and is required to be unintentional and does not suddenly fall off. As a product that meets this type of demand, there is a front release type buckle that can be disengaged by the operation of the front portion. Among the front release type buckles, it is known that the plug portion and the socket portion are each carded and fixed. For example, Patent Document 1 discloses a latching projection of a convex engaging portion of a plug portion, and a buckle that protrudes in a thickness direction of a flat-shaped buckle. Patent Document 2 describes a front end of a plug and a socket. The first protruding portion that is engaged with the buckle protrudes in the thickness direction of the flat buckle. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Patent No. 3248104 [Patent Document 2] JP-A-2006- 2046 No. 9 Publication No. 201200057 [Disclosure] [Problems to be Solved by the Invention] Patent Literature In the buckle according to Patent Document 2, since the closure protrudes in the thickness direction of the buckle, the thickness of the buckle changes. Therefore, for example, when such a buckle is used in a rucksack or the like, the thickness of the buckle is large, so that there is a problem that the mounting position is restricted and the overall design of the canvas backpack is adversely affected. Accordingly, it is an object of the present invention to provide a front release type buckle having a minimum thickness dimension. [Means for Solving the Problem] The front release type buckle according to the present invention includes: a socket into which the plug is inserted and engaged, the plug having a base portion protruding from the base portion; and the aforementioned The socket of the leg portion has a body having an insertion opening, a receiving space into which the leg portion is inserted from the insertion port formed in the foot, and a card inserted in the body to engage the carding portion And an operation portion for disengaging the card from the engaged portion, wherein the plug and the front seat have a flat shape, and the leg portion is flat and has a front portion that is engageable with the engagement portion The engaging portion is engaged in the thickness direction, and the engaging portion protrudes in the width direction of the leg portion and is provided within the thickness range of the leg. In such an invention, since the engaging portion of the plug does not protrude in the thickness direction but protrudes in the width direction, the receiving plug and the latching projection can be made smaller, or the restraining head can be: The thickness of the socket of the direction joint portion -6-201200057 of the flexible portion is inserted into the joint portion. Therefore, the thickness of the buckle does not become large, and the thickness can be reduced. For example, when such a front release type buckle having a small thickness is used in a rucksack or the like, since the thickness of the buckle is small, the mounting position is not limited. Further, since the thickness is small, the buckle is not too conspicuous, and the jamming does not occur, and the overall design of the canvas backpack or the like is not adversely affected. In the state in which the plug and the socket are engaged, the operation portion and the engagement portion are disposed to be in contact with each other, and the operation portion is provided at a position facing the leg portion in the thickness direction. The thickness direction described above is flexible, and it is preferable to have a convex portion inside the socket. In such an invention, the operation portion is bent toward the engagement portion side, and the convex portion can be pressed toward the leg portion. At this time, since the engagement between the engaging portion and the engaged portion can be released, the leg portion can be pushed out toward the insertion opening side of the socket. In the present invention, the engaging portion is an inclined portion provided with an inclined surface on the operation portion side, and it is preferable that the operating portion is bent toward the engaging portion side, and the convex portion is pressed against the inclined surface. In such an invention, the operation portion is bent toward the engagement portion side, and the convex portion can be pressed toward the inclined surface. At this time, since the convex portion is bent toward the engaging portion side while sliding on the inclined surface, the engagement between the engaging portion and the engaged portion is released, and the insertion portion is pushed out toward the insertion opening side of the socket. Therefore, pressing the operation portion, the plug is separated from the socket and pushed out. Therefore, as long as the operating portion is pressed, the plug and the socket can be separated. In the present invention, it is preferable that the angle of the inclined surface is 15°. In such an invention, since the angle of the inclined surface is 15 °, the convex portion 201200057 can smoothly slide on the inclined surface. Therefore, by pressing the operation portion, the plug can be separated from the socket and smoothly pushed out. Therefore, as long as the operation portion is pressed, the plug and the socket can be more reliably separated. In the present invention, it is preferable to have a pair of holding portions for positioning and holding the plug protruding from the base portion and the socket. In such an invention, since the pair of holding portions for positioning the plug and the socket are held, the engagement between the engaging portion and the engaged portion can be surely performed. Further, for example, after the torsional stress is applied to the plug and the socket, since the plug and the socket are not displaced, the engagement between the engaging portion and the engaged portion is not released, and the engagement can be surely maintained. In the present invention, it is preferable that the leg portion is inclined so as to be closer to the operation portion side than the insertion direction toward the leg portion. In such an invention, since the leg portion protrudes from the base portion toward the operation portion side from the holding portion, the engagement portion can be pressed by a slight bending after the operation portion is pressed. Therefore, even if the thickness of the front release type buckle is reduced, the separation and ejection of the plug and the socket by the operation portion can be performed. Therefore, the thickness of the front release type buckle can be further reduced by the stomach. [Embodiment] [Embodiment for Carrying Out the Invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings. An embodiment of the present invention is shown in FIGS. 1 to 12. -8- 201200057 The overall configuration of the front release type buckle will be described with reference to Figs. 1 to 3 . Fig. 1 is a plan view showing the overall configuration of an embodiment of the present invention. Fig. 2 is a side view showing the overall configuration of the above embodiment. Fig. 3 is a front elevational view showing the overall configuration of the above embodiment. As shown in each of FIGS. 1 to 3, the front release type buckle 1 of the present embodiment includes a plug 10, and a socket 20 into which the plug 10 is inserted and engaged, as shown in the drawings. The front release type buckle 1 is a connecting/separating rope-like member, for example, an end portion for connecting/separating a belt, and the like, and includes a plug 10 integrally molded of synthetic resin; and a synthetic resin integrally molded with the same Socket 2 0. Further, the material of the plug 10 and the socket 20 is not limited to a synthetic resin, and may be other materials such as metal, and is not limited to injection molding, and may be formed by other molding methods such as light shaping or squeezing. The configuration of the plug will be described with reference to Figs. 4 and 5 . Fig. 4 is a plan view showing the plug of the above embodiment. Fig. 5 is a side view showing the plug of the above embodiment. According to FIG. 4 and FIG. 5, the plug 1〇 is integrally formed by injection molding of synthetic resin and has a base portion 11 having a pair of leg portions 12: respectively formed on the engaging portion 14 of the leg portion 12; And a strap mounting portion 19 in which a strap or the like is inserted. The leg portion 12 is formed in parallel with the width direction of the base portion 11 (the direction in which the insertion direction of the plug 10 of the socket and the thickness direction of the socket 20 are -9-20 201200057, respectively, in the left-right direction of FIG. 1). The long direction (the insertion direction of the plug 10 of the socket 20, the up-and-down direction of FIG. 1) extends and is parallel to each other, and each of the intermediate or front end sides can be mutually opposite to the thickness direction (the width direction and the insertion direction are orthogonal to the foregoing). Direction) elastic deformation. Further, the pair of leg portions 1 2 are inclined so as to be closer to the side of the insertion portion 27A toward the insertion direction, whereby the entire portion of the leg portion 12 can be elastically deformed in the thickness direction. The engaging portions 14 are formed by protrusions extending from the front ends of the leg portions 12 in the width direction, and the front ends of the leg portions 12 are formed in a T-shape when viewed from the plane. Further, the engaging portion 14 is formed at the front end portion of the leg portion 12, and the dimension (height) in the thickness direction of the engaging portion 14 is formed so as not to be larger than the height of the leg portion 12. Further, the engaging portion 14 is provided with an inclined portion 14B formed at the front end portion of each leg portion 12 and a connecting inclined portion 14D connecting the inclined portion 14B in the wide direction. The pair of leg portions 1 2 restrict the deformation in the width direction due to the external force by the connecting inclined portion 1 4D. Further, when the pair of leg portions 1 2 are elastically deformed in the thickness direction, the amount of deformation of each of the leg portions 12 is similarly obtained by connecting the inclined portions 14D. Further, each of the inclined portion 14B and the connecting inclined portion 14D is provided with a gently inclined inclined surface 14A having a thickness dimension that decreases toward the distal end side in the insertion direction, and a connecting inclined surface 14C. As shown in Fig. 5, a pair of holding portions 16 are provided outside the pair of leg portions 12. The pair of holding portions 16 are arranged in a columnar shape that is separated from the base portion 1 1 in the width direction, and is a columnar member that extends in the insertion direction, and -10-201200057 has its front end separated from the engaging portion 14. The thickness of the holding portion 16 is smaller than the thickness of the slit 1 and is larger than the thickness of the leg portion 12, and the holding portion 6 has a holding convex portion 16A provided along the outer side in the width direction. The engaging portion 14 and the holding portion 16 are guided by a concavo-convex shape (described later) formed inside the splicing, and are formed by the plugging operation when the insertion operation is performed. Further, as shown in Fig. 4, the tape mounting portion 19 is formed by the portion between the base portions 11. The strap mounting portion 19 is a strap mounting hole 19A having a belt insertion into the center of the inner portion, and at the end of the plug 10 at the end portion of the base portion, the first crossbar is extended in the width direction. B, the second 19C is provided in the intermediate frame of the tape mounting hole 1 9 A, and the tape mounting hole 19A is divided into the front end side 1 9 D and the insertion direction rear end side 1 9 E by the second cross bar 19C. End side. Thereby, a tape (not shown) is inserted into the tape attachment hole 19A, and around the second crossbar 19C, the tape is brought into contact with the first crossbar 19B to form an engagement tape, and the length can be adjusted and adjusted. Construction. Fig. 1 and Fig. 6 to Fig. 8 show the configuration of the socket. Fig. 6 is a plan view showing the socket of the above embodiment. Fig. 7 shows a side view of the socket of the embodiment. Fig. 8 is a front view of the above embodiment. In Fig. 1 and Fig. 6 to Fig. 8, the socket 20 is formed by a larger convex portion of the base of the synthetic resin, and the middle end portion of the position is inserted, and the cross bar is inserted and wound. The socket 11 - 201200057 is formed by molding, and is integrally molded, and has an empty tubular body 21 having an insertion opening 22; and is formed in the body 21 to accommodate a plug inserted from the socket 22. a receiving space 23 of the one leg portion 12; an engaged portion 24 that is formed on the main body 21 and engageable with the engaging portion 14, and an operation opening 27 formed in the center of the plane of the body 21; when engaged with the plug An opening portion 28 formed at a position corresponding to the engaging portion; and a strap mounting portion 29 through which a belt (not shown) can be inserted. The engaged portion 24 is a shape member having an inclined surface on the side of the insertion opening 22 which is formed in two places which are formed in parallel with the width direction of the side of the accommodating space 23. Each of the engaged portions 24 is formed inside the surface of the body 21 and protrudes in the accommodating space 23. The thickness of the engaged portion 24 is smaller than the size of the accommodating space 23 in the thickness direction, and corresponds to the engaging portion 14 formed on the pair of legs 12. An induction surface 25 for guiding and engaging the engaging portion 14 to the engaged portion 24 is formed inside the accommodating space 23. The induction surface 25 is formed with a plurality of pair of groove portions 26 from the end portion of the insertion port 22 toward the insertion side. When the leg portion 1 2 and the holding portion 16 are inserted from the insertion port, the convex portion corresponding to the back side of the leg 12 (not shown) corresponds to the groove portion 26, and the front portion of the leg portion 12 is provided. The engaging portion 14 is induced to function as a guide by the engaging portion 24. The configuration of the operation portion of the socket will be described with reference to Fig. 9'. Fig. 9 is a cross-sectional view showing the operation portion of the socket of the above embodiment. As shown in FIG. 9, in order to release the portion of the engagement portion 14 and the wedge portion of the intermediate portion of the engaged portion 24, the 22-end end card 12-201200057 is engaged, and an operation is formed in the center of the plane of the body 21. Use the opening 27. The opening 27 is communicated with the internal accommodating space 23. The operation opening 27 is formed at a position where the connection inclined portion 1 4 D that is connected from the leg portion 1 2 of the insertion port 22 is exposed. The operation opening 27 is provided with an operation portion 27A for pressing a flexible member having a thickness. The position of the operation portion 27A which is opposed to the leg portion 12 is abutted against the connection 14D due to elastic deformation. Further, the operation portion 27A is provided with a convex portion 27B that protrudes inward in the thickness direction at a position where the connection is obliquely contacted, and a thick meat portion located outside the thickness direction at a position corresponding to the portion 2 7 B is according to FIG. 9 to Fig. 12 is a view showing a state in which the plug and the socket are connected and connected, and the plug and the socket are disconnected. Fig. 10 is a cross-sectional view showing the plug and the socket of the above embodiment. Fig. 11 is a cross-sectional view showing a state of the plug and the socket of the above embodiment. Fig. 1 is an enlarged cross-sectional view showing a state in which the engaging portion is pushed out by bending of the above-described embodiment. As shown in FIG. 9 and FIG. 11, 'at the front end of the insertion 12 from the insertion opening 22, when the engaging portion 14 is induced to the induction surface 25 and comes to the portion 24, the pair of leg portions 1 are elastically deformed, and a pair of The engaging portion] is engaged with the engaged portion 24. On the other hand, as shown in Fig. 1 and Fig. 12, the convex portion 27B slides on the inclined surface of the connecting inclined surface 14C by elastically deforming the leg portion 1 2 in the thickness direction by the inclined portion 14D. Thereby, the engaging portion is released from the inclined portion 1 4D and the projection 27C. In the case of the scorpion in the state of the scorpion, the leg portion of the splicing operation is engaged with the splicing portion 4, and 14 and -13-201200057 are engaged by the engaging portion 24, and the plug 1 is pushed out toward the insertion port 22 side. In the present embodiment as described above, the following effects can be obtained. In the front release type buckle 1 of the present embodiment, the engaging portion 14 of the plug 10 does not protrude in the thickness direction but protrudes in the width direction, so that the thickness of the buckle does not become large, and Reduce the thickness size. Therefore, when such a front release type buckle 1 having a small thickness is used for a rucksack or the like, since the thickness of the buckle is small, the mounting position is not limited. Moreover, since the thickness is small, the buckle is not too conspicuous and does not adversely affect the overall design of the rucksack or the like. In the front release type buckle 1 of the present embodiment, the operation portion 27 is bent toward the engagement portion 14 side, and the convex portion 27 is pressed against the inclined surface 14C. At this time, since the convex portion 27 is slipped away from the connecting inclined surface 14C and is bent toward the engaging portion 14 side, the engagement between the engaging portion 14 and the engaged portion 24 is released, and the socket 2 is removed. The insertion port 2 side of 0 is pushed out. Therefore, as long as the operation portion 27 is pressed, the plug 10 is separated from the socket 20 and pushed out. Thereby, the plug 1A and the socket 20 can be surely separated by pressing the operation portion 27A. In the front release type buckle 1 of the present embodiment, since the angle of the connecting inclined surface 1 4 C is 15°, the convex portion 2 7 Β can smoothly slide away from the connecting inclined surface 1 4 C. Therefore, pressing the operation portion 2 7 Α ' can separate the plug 10 from the socket 20 and smoothly push it out. By this, the plug 10 and the socket 20 can be separated more reliably as long as the operation portion 27 is pressed. In the front release type buckle 1 of the present embodiment, the pair of holding portions 16 that are held by the positioning plug 14-201200057 ίο and the socket 20 are provided, so that the engaging portion 14 and the engaged portion 24 can be surely performed. Engage. Further, for example, when the torsional stress is applied to the plug 10 and the socket 20, since the plug 10 and the socket 20 are not displaced, the engagement between the engaging portion 14 and the engaged portion 24 is not released. I can safely play the role of a buckle. In the front release type buckle 1 of the present embodiment, since the leg portion 1 2 protrudes from the base portion 1 1 toward the operation portion 2 7 A side than the holding portion 16 , when the operation portion 27A is pressed, a slight bending can be pressed. Engagement portion 1 4. Therefore, even if the thickness of the front release type buckle 1 is small, the separation and ejection of the plug 1 and the socket 20 can be performed by the operation portion 27A. Thereby, the thickness of the front release type buckle 1 can be made smaller. [Modification] Further, the present invention is not limited to the configuration of the above embodiment, and includes the following modifications. In the above embodiment, the pair of leg portions 1 2 are not limited to the structure in which the connecting inclined portion 14D is coupled, and as shown in Fig. 13, an independent structure that is not connected may be used. Further, in such a case, it is preferable to press the inclined surface 14A by increasing the width of the convex portion 27B. Further, the engaging portion 14 is not limited to a structure formed by protrusions extending outward from the distal end of the leg portion 12 in the width direction, and as shown in Fig. 14, a projection extending inward in the width direction may be formed, and the inclined portion 14B may be formed. It may not be provided on the front end side in the insertion direction but on the opposite side. Further, the engaging portion 14 does not need to be formed in an L shape, and may be formed as one engaging portion 14 as shown in Fig. 15 -15 - 201200057. Further, the leg portions 12 do not have to be formed as a pair, and may be composed of three leg portions 12 as shown in Fig. 16 . [Industrial Applicability] The present invention is a buckle that connects the belts to each other, and can be used as a front release type buckle having a pair of stopper arms. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing an overall configuration of an embodiment of the present invention. Fig. 2 is a side view showing the overall configuration of the above embodiment. Fig. 3 is a front elevational view showing the overall configuration of the above embodiment. Fig. 4 is a plan view showing a plug of the above embodiment. Fig. 5 is a side view showing the plug of the above embodiment. Fig. 6 is a plan view showing a socket of the above embodiment. Fig. 7 is a side view showing the socket of the above embodiment. Fig. 8 is a front elevational view of the socket of the foregoing embodiment. Fig. 9 is a cross-sectional view showing an operation portion of the socket of the above embodiment. Fig. 10 is a cross-sectional view showing a state in which the plug and the socket of the above embodiment are connected. Fig. 1 is a cross-sectional view showing a state in which the plug and the socket of the above embodiment are connected. Fig. 12 is an enlarged cross-sectional view showing a state in which the engagement portion of the -16-201200057 is pushed out by the bending of the operation portion of the above-described embodiment. Fig. 13 is a plan view showing a plug according to another embodiment of the present invention. Fig. 14 is a plan view showing a plug according to another embodiment of the present invention. Fig. 15 is a view showing another embodiment of the present invention. Top view of the plug 图 [Fig. 16] shows a plan view of a plug according to another embodiment of the present invention [Description of main components] I: front release type buckle 10: plug II: base 1 2: foot 14: engaging portion 1 4 A : inclined surface 14B : inclined portion 16 : holding portion 20 : socket 21 : main body 22 : insertion opening 2 3 : receiving space 24 . engaged portion -17 - 201200057 2 7 A : operation portion 2 7 B : Convex