201129109 六、發明說明： 【發明所屬之技術麵域】 發明領域 本發明係有關於一種具有至少—部份可插入至外 之外耳道插入構件之耳機。 發明背景 習知’裝戴於耳廓來使用之耳機已知有不具有插入至 外耳道之突起部之所謂耳機型頭戴式耳機的類型者。（例如 參照專利文獻1)。此種耳機具有動態型驅動器單元，使1 驅動器單元具有之振動板振動，而產生聲音。 Λ 第8圖係顯示習知耳機構造之截面圖。 在圖中，813係耳機之後部殼，於其内部安裝有驅動器 單元州’並以嵌設於後部殼8丨3前端（圖之下端）之環狀前部 殼812固定前述驅動器單元84卜又，氣道狀耳機線保持部 815從後部殼813後面延伸而出，在該耳機線保持部815内收 容有一端連接於驅動器單元84卜另一端連接於圖中未示之 音樂播放器、電視、收音機、音影卡座等圖中未示之音響 機器之電線891。 又，刖述驅動器單元841具有形成磁路之磁鐵gw、磁 板844及磁軛<845、形成振動系統之振動板846及音圈847。 具體言之，於盤狀磁鐵843兩面固設有磁板844及磁軛845。 此外，磁鐵843為釤始磁鐵。又，於磁板844與磁輛845相對 之空間形成有磁間隙，固設於振動板846之音圈847插入至 201129109 前述磁間隙。振動板846係聚酯薄膜。此外，於耳機之前面、 即振動板846之前方（圖之下方）配設有具較大之許多開口之 網眼狀保護板848。 又，於磁鐵843、磁板844及磁軛845之中心部形成有貫 穿孔849 ’於該貫穿孔849埋設有由發泡性胺甲酸乙酯等構 成之電阻材871。再者，於驅動器單元841形成有複數個孔 870。 當將耳機裝戴於耳廓之凹部時，配設於耳機前面之保 護板848與外耳道之入口相對，藉振動板846振動而產生之 聲音通過保護板848之開口，入射至外耳道之内部，而到達 鼓膜。 先行技術文獻 專利文獻 專利文獻1曰本實用新型公開公報平4-50718號 C發明内容】 發明概要 發明欲解決之課題 然而，在前述習知耳機中，由於裝戴於耳廓凹部，故 裝戴性差’制是如步行巾，使用者讀止狀態時，有從 耳廓脫落之情形。X，與外耳道之位置關係不穩定，人射 至外耳道之聲音音量及音質便不穩定。 有由具彈性之軟質橡膠等構成之耳墊， 耳道之類型的耳機。此種耳機由於將柔 耳道來裝戴，故可確實地裝戴於耳廓， 因此，近年提供具 將該耳墊插入至外 軟之耳墊插入至外 在步行中亦不致從 4 201129109 耳廓脫落。又，由於耳墊由具彈性之材料構成，故可配合 外耳道之形狀而易彈性變形，而可獲得良好之裝戴感。 然而，當將耳墊插入至外耳道時，以為該外耳道所按 壓而變形之耳墊遮斷外耳道之内外，從耳機入射至外耳道 之聲音無法穿透至外部，所謂聲音之穿透性變差，於聲音 產生不清楚感、模糊感等，音質降低。 本發明之目的係提供解決前述習知之問題點，在殼體 内，於形成於驅動器單元前方及後方之音響空間分別形成 空氣調整孔，並且，於形成於驅動器單元後方之音響空間 形成直徑較空氣調整孔小之音質調整孔，藉此，聲音之穿 透性佳，而可再現清晰度佳之低音及明亮之中高音，裝設 感佳，且音質高的耳機。 用以欲解決課題之手段 因此，在本發明之耳機，該耳機包含有至少一部份可 插入至外耳道之外耳道插入構件、可安裝該外耳道插入構 件之殼體、及配設於該殼體内，以產生聲音之驅動器單元； 前述殼體具有形成於前述驅動器單元前方之前方空間、連 通該前方空間之前端，而使聲音入射至外耳道之聲音導 孔、及形成於前述驅動器單元後方之後方空間，前述前方 空間具有與外部連通之前方空氣調整孔，前述後方空間具 有：與外部連通之後方空氣調整孔、直徑較該後方空氣調 整孔小，並與外部連通之音質調整孔。 在本發明之另一耳機中，前述後方空氣調整孔及音質 調整孔配置於與前述驅動器單元之振動板之振動方向直交 201129109 之面上。 在本發明又另一耳機中，前述前方空間係圓錐台狀之 空間，前述前方空氣調整孔於前述前方空間之與驅動器單 元相對之面形成為朝向前方，前述後方空間係與驅動器單 元相對之面為平面之圓筒狀空間，前述後方空氣調整孔及 音質調整孔於前述後方空間之圓筒狀側面形成為朝向側 邊。 在本發明又另一耳機中，前述前方空氣調整孔之直徑 及前述後方空氣調整孔之直徑相等。 在本發明又另一耳機中，前述音質調整孔具有：控制 預定音域之音質之第1調整孔；及直徑較該第1調整孔小， 並控制較前述預定音域更低音側之音質的第2調整孔。 發明效果 根據本發明，耳機係在殼體内，於形成於驅動器單元 前方及後方之音響空間分別形成空氣調整孔，並且，於形 成於驅動器單元後方之音響空間形成直徑較空氣調整孔小 之音質調整孔，藉此，聲音之穿透性佳，而可再現清晰度 佳之低音及明亮之中高音，且裝戴感佳，並可使音質提高。 圖式簡單說明 第1圖係本發明第1實施形態之耳機之立體圖，且為部 份截斷圖。 第2A-E圖係本發明第1實施形態之耳機之五面圖，（A) 係上面圖，（B)係左側面圖，（C)係背面圖，（D)係右側面圖， (E)係正面圖。 201129109 第3圖係本發明第1實施形態之耳機之截面圖，為第a 圖之A-A箭視截面圖。 （C) 第4A-D圖係本發明第！實施形態之耳墊之四面圖， 係左側面圖’（B)係背面圖，（c)係右側面圖，⑼係正面$ “第5A-D圖係本發明第丄實施形態之耳墊之截面圖，（八° 係第4(B)®之β·Β箭視截面圖’⑼係第4⑻圖之cc箭視截 面圖’（C)係第4(C)圖之D-D箭視截面圖，⑼係第4(c)圖之 E~E箭視截面圖。 第6圖係本發明第2實施形態之耳機之戴面圖，為第7(C) 圖之F-F箭視截面圖。 第7A-E圖係顯示本發明第2實施形態之耳機之五面 圖，（A)係上面圖，（B)係左側面圖，（C)係背面圖，（P)係右 側面圖，（E)係正面圖。 第8圖係顯示習知耳機構造之截面圖。 C 方包】 用以實施發明之形態 以下，就本發明實施形態，一面參照圖式，〆面涔 說明。 第1圖係本發明第丨實施形態之耳機之立體圖，為 截斷圖，第2圖係本發明第1實施形態之耳機之五面圈，第3 圖係本發明第1實施形態之耳機之截面圖，為第2(C)_ / A-A箭視截面圖。此外，在第2圖中，（A)係上面圖’（0)係 左側面圖，（C)係背面圖，（D)係右側面圖，（E)係疋面圖 在圖中，ίο係本實施形態之耳機’係裝戴於使用者之 7 201129109 耳廓來使用，以為電信號之聲音信號驅動，將聲音信號再 生之小蜇聲音產生器。又，前述耳機10具有内藏作為將聲 音再生，而產生聲音之揚聲器單元之驅動器單元41的作為 殼之殼體11、安裝於該殼體11，至少其前端部55可插入至 使用者外耳道之作為外耳道插入構件的耳墊5〇。 前述殼體11具有位於其正面側之前殼體12、結合於該 前殼體12之基部12a後側之圓錐台狀後殼體13、結合於該後 殼體13後側之蓋设體14。又，如第3圖所示，驅動器單元 以藉前殼體12及後殼體13失前後（第3圖之上下）之狀態，保 持於前述殼體11内。此外，驅動器單元41係所謂動態型者， 具有與在「發明背景」之項所說明之習知耳機的驅動器單 元841相同之結構。即，在本實施形態中，關於驅動器單元 41之說明，沿用習知耳機之驅動器單元841之說明。 又，後殼體13之後面以蓋殼體14封住，藉此，於殼體 11内之驅動器單元41後方（第3圖之下方)形成為組合有圓錐 台及圓筒之形狀之”的後方㈣24。該後方空間Μ之鱼 ^動器單元41相對之面係蓋殼體14之内面，且係與驅動器 單兀41之振動板平行之平面。 此外，在圖所示之例中，蓋殼體14係與後殼體13獨立 ^構件，亦可為與雜肋形成—料ϋ述殼體^ :合=等樹脂構成，亦可編、鋼、鋼等金屬構成 '、為由將樹脂、碳、金屬等合成之複合材構成者。 ^者’於前述蓋殼肋安裝有包圍—端連接於驅動器 凡之耳機電線91-部份而保持之筒狀耳機線保持部Μ 201129109 的上itb外，5亥耳機線保持部亦可為與蓋殼體^形成 -體者。而且’耳機電線91從耳機線保持部15之下端延伸 而出。此外，在第i圖及第2圖t，為圖式顯示方便，耳機 電線91僅輯㈣耳機線保持部15之部份，其他之部份則 省略描繪。又，於耳機電線91之圖中未示之另—端可連接 音樂播放H、電視、收音機、音影卡料时未示之音響 機器。 前述前殼體η不僅具有圓筒狀基部仏，亦具有從該基 部⑽前方突出之圓錐台狀圓錐部16'及從該圓錐部财 前端突出之作為筒狀插人構件安I部之墊安裝和。前述 圓錐部16其前端之直徑小於其基端（連接於基部仏之部 份），藉此，於殼體U内之驅動器單元4i前方（第3圖之上方） 形成為圓錐台狀空間之前方空間21。又，於前述塾安装部 17形成有為後端連通前方空_，前關放之圓筒狀開口 之作為聲音導孔的殼體聲音導孔22。藉此，驅動器翠元Μ 所產生之聲音通過Μ方空間21及殼體聲音導似，入射至 使用者之外耳道。此外，在圖所示之例中，圓錐㈣形成 為其前端之軸心相對於基端之^傾斜至右方，而其前 之軸心相對於基端之“傾斜至任-方向’亦可不必 傾斜，前私批㈣於平行亦可。 又，於前殼體=圓錐邹1δ形成有為具排氣口之功能 之空氣調整孔之作為前方空氣調整孔的前方氣道25。 方氣道25係减為貫穿圓錐部16之❹圓形之孔，將前方 空間21與外部連通’前方”21内之空氣可排放至外部。 201129109 此外，前方氣道25形成於圓錐部16之罪近基部12a之部份、 即形成於朝前方之面之部份。亦即’前方氣道25形成為朝 向前方，而可將前方空間21内之空氣朝前方排放。此外’ 前方氣道25之直徑為1.2 [mm] ’可按驅動器單元41之性能、 前方空間21之尺寸等變更。 又，於後殼體13形成有為具排氣口之功能之作為後方 空氣調整孔的後方氣道28，作為音質調整孔之第1調整孔 27a及第2調整孔27b。此外，總括說明第1調整孔27a及第2 調整孔27b時，以音質調整孔27來說明。 前述後方氣道28係形成為貫穿後殼體13之戴面圓形之 孔’將後方空間24與外部連通，後方空間24内之空氣可排 放至外部。此外，後方氣道28形成於後殼體13之朝側邊之 面之部份°亦即，後方氣道28形成為朝向側邊，而可將後 方空間24内之空氣朝側邊排放。此外’後方氣道28之直徑 堍定成與前述前方氣道25相等’可按驅動器單元41之性 忐、後方空間24之尺寸等變更。如此，藉將同—直徑之排 氣口、即則方氣道25及後方氣道28配設於前方空間21及後 方空間24，可改正聲音之失真及回音，而可提高作為音響 空間之前方空間21及後方空間24之音響性能。再者，藉配 δ又則方氣道25及後方氣道28，可減輕施加於驅動器單元41 之振動板之負荷。 又’前述第1調整孔27a及第2調整孔27b係形成為貫穿 後殼體13，朝向側邊之截面圓形之孔，將後方空間24與外 部連通’並且與後方氣道28相鄰，且於後殼體13之同一圓 10 201129109 周上並列配設成形成一列。又，苐丨調整孔27a之直徑形成 為小於後方氣道28之直徑，第2調整孔27b之直徑形成為小 於第1調整孔27a之直徑。 第1調整孔27a之直徑為〇.8 [mm]。藉令第〗調整孔27a 之直徑為此種值，控制中音域、亦即以12〇〇 [Hz]為中心之 頻帶之聲音，可使頻率響應更順暢，而可使音質提高。又， 第2調整孔27b之直徑為〇_4[mm]。藉令第2調整孔27b之直徑 為此種值，控制低音域、亦即以2〇〇 [Hz]為中心之頻帶之聲 音，可使頻率響應更順暢，而可使音質提高。 此外，在圖中所示之例中，音質調整孔27為第丨調整孔 27a及第2調整孔27b2個，音質調整孔27根據要控制之頻 帶，可為1個，亦可為3個以上。又，音質調整孔27之直徑 可按作為控制對象之聲音之頻帶變更。即，為控制較低頻 帶之聲音’縮小音質調整孔27之直徑即可，為控制較高頻 f之聲a，擴大音質調整孔27之直徑即可。 又’於前述塾安裝部17安裝有耳墊5〇。該耳塾％由矽 橡膠等軟質之可彈性變形之材料構成，為—體成形之構 件〃有又於墊女裝部17周圍之筒狀本體部51、從該本 體部51之别端朝後端斜向擴展之作為彈性變形體之伞狀部 53此外於本體部Η之後端軸有朝㈣突出之厚度厚 的凸緣狀卡合凸部52。該卡合凸部辦形成㈣安裝部η 之基端部(與圓錐部16之前端之連接部)之雜卡合凹部m 卡合1可防止耳㈣㈣安裝部i7脫落。 d耳墊50王體呈形似香益或傘之形狀，在其前端部 201129109 Μ ""賴有傘狀部53之前端，於本體部 外周面與傘狀部53之内周面間形成有空洞部65。又， =體部51之中心形成有為前後端開放之圓筒狀開口之作 為聲音導孔的墊聲音導孔61。以於墊安裝和安裝耳_ 之狀態’塾聲音導孔61與殼體聲音導孔22連通。 又，傘狀部53具有朝後方擴展之圓錐台狀前半部仏、 半部53a之後端延伸而出至後方之圓筒狀後半部 錢勒厚度較讀部51薄，且具錄性而可因承 =量，而易變形。因而，當耳塾5〇插入至 :變形成適合外耳道之内面形狀，而不致對外 I〜灿傷，且不於外耳道之内面施加反作用力而可密 Q，故裝戴感、合適感等佳。 ^ ’於讀部53之料部…形成錢料側觀看延 I 複數個(在圖所示之财為6個）縫隙狀開口部 田使用者裝戴耳機_，耳㈣插人至外耳道，以伞 外:遮斷外耳道之内外'然而、由於因開口部以之存在， :音仍可入射至外耳道之内部，到達鼓膜，;^ :。又’由於外耳道内部之空氣通過開口部&，穿透至： 二故可減低從驅動器單元41經由殼體聲音導孔 二導孔61，讀至料勒敎聲音H衫楚, 因此，低音之清晰度佳，中高音明亮。又 驅動器單撕聲⑽侧，故输⑽言亦佳來自 此外’在本體部51之外周面，於與前述開口部62分別 12 201129109 〜位置形成有於前後方向 '即本體部51之軸方向延伸 g為溝的塾溝63。因此，當耳墊5〇插入至外耳道之際， 飞吏t成丰狀部53變形’而被壓至本體部Η之外周面之狀 心 ；開口。卩62與對應其之墊溝63相互疊合，故可維持 外耳道内外之連通。 在月j λ又體12之圓錐部16表面之至少與塾安農部 於^連接。卩附近，於與前述麵63分別對應之位置形成有 :月j後方向、即圓錐部16之軸方向延伸之作為溝的殼體溝 1又，忒殼體溝31其前端與前述墊溝63之後端連通，並 且’延伸至比錢部53之後端還錢;T。因此，當耳塾50 插入至外耳道之際，即使形成傘狀部53變形，不僅被壓至 本體部51外周面，亦被壓至圓錐部财面之狀態由於開 口。P62與對應其之墊溝63及殼料叫目互連通，故可維持 外耳道内外之連通。 接著’就前述耳墊50之結構詳細說明。 第4圖係本發明第1實施形態之耳墊之四面圖，第5圖係 本發明第1實施形態之耳墊之截面圖。此外，在第4圖，（A) 係左側面圖，（B)係背面圖’（〇係右側面圖，係正面圖， 在第5圖，（A)係第4(B)圖之B-B箭視截面圖，（b)係第4(B) 圖之C-C箭視裁面圖’（C)係第4(C)圖之D_D箭視截面圖，（D) 係第4(C)圖之E-E箭視截面圖。 本體部51之則知與傘狀部53之前端以前端連接部54連 接，各開口部62之前端藉由連通凹部64，連通於塾聲音導 孔61之前端。又’在耳墊50之圓周狀前端部55，前端連接 13 201129109 部54與連通凹部64交互配置。因此，從驅動器單元“經由 殼體聲音導孔22及塾聲音導孔6丨而人射至外耳道内部之聲 音由於其一部份藉由連通凹部64 ,從開口部62穿透至外 部，故可減低壓迫感、不清楚感等，而明亮。 此外’如第5(A)圖所示，前端連接部54厚度較傘狀部 53厚，剛性高於傘狀部53 ’而不易變形。又，配設成爽^ 前端連接部54間之連通凹部64從侧面觀看，形成為凹入至 比前端部55之刖端緣、即前端連接部54之前端緣還後方。 因此，當耳墊50插入至外耳道之際，即使傘狀部53變形， 連通凹部64亦不致封閉，而可維持墊聲音導孔61與開口部 62之連通。此外，如前述，即使形成傘狀部53變形，不僅 被壓至本體部51之外周面，亦被壓至圓錐部16表面之狀 態，開口部62、塾溝63及殼體溝31仍可連通。因而，由於 可穩定地確保從墊聲音導孔61經由連通凹部64、開口部 62、塾溝63及殼體溝31，至外部之聲音之通道，故可穩定 地減低壓迫感、不清楚感等，而可維持明亮之音質。 又’如第5(B)圖所示，開口部62宜形成為在其前端與 墊溝63之前端連接。此時，即使傘狀部53大幅變形，開口 部62與墊溝63之連通仍可維持穩定。 再者，如第4(D)圖所示，於傘狀部53之前半部53a形成 有從正面觀看延伸成放射狀之複數個縫隙狀開口部62。因 此，因開口部62之存在，前半部53a之剛性降低，而易變形， 虽耳墊50插入至外耳道之際，不僅前半部53a，傘狀部53全 體柔軟地彈性變形，而適合外耳道之内面形狀。因而，由 14 201129109 於不致對外耳道造成損傷，安全性高，傘狀部部53不致於 外耳道之内面施加反作用力而可密合，故裝戴感、合適感 等佳。 此外’在圖中所示之例中’開口部62、墊溝63、殼體 溝31及連通凹部64之數分別為6個’未必需為6個，可為5個 以下，亦可為7個以上。 接著，就本發明第2實施形態作說明。此外，關於具有 與第1實施形態相同之構造者’藉賦與相同之標號，而省略 其說明。又’關於與前述第1實施形態相同之動作及相同之 效果’亦省略其說明。 第6圖係本發明第2實施形態之耳機之截面圖，為第7(C) 圖之F-F箭視截面圖，第7圖係顯示本發明第2實施形態之耳 機之五面圖。此外，在第7圖中，（A)係上面圖，（B)係左側 面圖，（C)係背面圖，（D)係右側面圖，（E)係正面圖。 在本實施形態中，殼體11具有位於其正面側之前殼體 12、結合於該前殼體12之基部12a後側之圓錐狀後殼體 133。又，如第6圖所示，驅動器單元41以藉前殼體12及後 殼體133夾前後（第6圖之上下）之狀態，保持於前述殼體11 内。又’後殼體133係後端密閉’且尖銳之形狀的圓錐狀構 件’藉此，於殼體11内之驅動器單元41之後方（第6圖之下 方）形成為呈圓錐形之空間之後方空間244。又，前述殼體 11由合成樹脂等樹脂構成。 再者，於形成為從前述後殼體133之圓錐狀側面突出至 外側之安裝突起13c安裝有包圍一端連接於驅動器單元41 15 201129109 ΠΓ1 一部份而保持之扁平長方體狀耳機線保持部 Π該耳機線保持部15可為與後殼體_成二 者。又’耳機電線陳耳機線鱗部15延伸^ 前述前殼體12不僅具有圓筒狀基部12a ::元41前面相對之幾乎平坦的圓—圓板:: 7之筒《安裝㈣。以前相板㈣㈣殼趙u之前 方，藉此，於殼體U内之驅動器單元41前方（第6圖之 形成為上下尺寸短之圓筒狀或形似使__向下之_ 之空間的前方㈣21。1於前述塾安裝部19形成有為後 端連通前方”21，前端之_㈣Π之作為聲音導 孔的殼體聲音導孔22。藉此，驅動器單元41所產生之聲立 通過前方空間21及殼體聲音導孔22，人射至使用者之^ 道。此外，在圖所示之例中，塾安裝部19形成為其轴心相 對於前殼體12之軸心及驅動器單元41之軸心，傾斜至右 方，墊安裝部19K、可㈣於前殼體12之如及驅動器 單元4i之轴心、傾斜至任-方向，χ ,亦不需傾斜，塾安裝 部19之軸心相對於前殼體12之軸心及驅動器單元41之軸心 平行亦可。 又，於刖设體12形成有作為具有排氣口之功能之空氣 調整孔的前方氣道25。該前方氣道25係形成為貫穿圓板部 18之截面圓形之孔，連通前方空間21與外部，前方空間21 内之空氣可排放至外部。此外，前方氣道25形成為朝向前 方’而可將前方空間21内之空氣朝前方排放。 又，於後殼體133之圓錐狀側面形成有作為具有排氣口 16 201129109 之功能之空氣調整孔的後方氣道28、作為音質調整孔之第1 調整孔27a、2個第2調整孔27b。 前述後方氣道28係形成為貫穿後殼體I3之圓錐狀側面 之截面圓形的孔，將後方空間24與外部連通’後方空間24 内之空氣可排放至外部。此外，後方氣道28形成為朝向斜 後方，而可將後方空間24内之空氣朝斜後方排放。 又，前述第1調整孔27a及第2調整孔27b係形成為貫穿 後殼體13之圓錐狀側面，朝向斜後方之截面圓形之孔，將 後方空間24與外部連通，並且與後方氣道28相鄰，且於後 殼體13之同一圓周上並列排設成形成一列。 在第2實施形態中，配置2個第2調整孔27b係因後殼體 133之形狀與第1實施形態不同，為圓錐形，後方空間244之 音響特性與後方空間24不同，而以孔數控制低音域之故。 在本實施形態中，耳墊50直接安裝於墊安裝部19。具 體言之’卡合凸部52與形成於墊安裝部19之溝狀卡合凹部 19a卡合，而可防止耳墊50從墊安裝部19脫落。 又’本實施形態之耳墊5〇不具有開口部62及墊溝63。 即’在本實施形態中，省略了開口部62及墊溝63。 如此’在本實施形態，耳機1〇包含有至少一部份可插 入至外耳道之耳墊5〇、可安裝耳墊50之殼體11、及配設於 设體η内，產生聲音之驅動器單元41，殼體u具有形成於 驅動益單元41前方之前方空間21、連通於前方空間21之前 端而使聲音入射至外耳道之殼體聲音導孔22、及形成於 驅動器單元41後方之後方空間24，前方空間21具有與外部 17 201129109 連通之前方氣道25，後方空間24具有與外部連通之後方氣 道28、及直徑較後方氣道28小，並與外部連通之音質調整 孔27。 藉此，可適當地調整前方空間21與後方空間24間之空 氣平衡，而可減輕施加於驅動器單元41之振動板之負荷。 又，可改正聲音之失真及回音，而可使音質提高。進而， 高音及低音皆流暢，而可使音呈現開放感。 即，該等音質調整孔27係根據該孔之直直徑，決定要 控制之音域，根據其數，控制其特性者，係調整與聲音之 開放感相關之空氣平衡者。 再者，形成於後殼體13之側面部13b之後方氣道28及音 質調整孔27配置於同一圓周上，即對驅動器單元之振動板 之振動方向直交之假想平面上，而於距離振動板之距離相 同之位置配置各調整孔，而可更有效地控制聲音。 又，在前述第1實施形態，前方空間21係圓錐台狀之空 間，前方氣道25於前方空間21之與驅動器單元41相對之面 形成為朝向前方，後方空間24係與驅動器單元41相對之面 為平面之圓筒狀空間，後方氣道28及音質調整孔27於後方 空間24之圓筒狀側面形成朝向側邊。藉此，聲音之穿透性 佳，而可再現清晰度佳之低音及明亮之中高音。 再者，前方氣道25之直徑與後方氣道28之直徑相等。 藉此，前方空間21與後方空間24間之空氣平衡佳。 又，音質調整孔27具有控制高音音質之第1調整孔 27a、直徑較第1調整孔27a小，並控制低音音質的第2調整 18 201129109 孔27b。藉此，可適當地控制所期之頻帶之音質。 在第2實施形態中，殼體U具有形成於軸器 方之圓筒狀前方空間21、連通前方空咖前端 射至外耳道之殼體聲音導孔&形成於驅動器單元缝方 Z錐狀關之後方_4，並1，_ 方空間24具有朝向斜後方開口之音質調整孔… 如此，由於收容驅動器星BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earphone having at least a portion that can be inserted into an external ear canal insertion member. BACKGROUND OF THE INVENTION Conventionally, earphones that are worn on the auricle are known to have a type of so-called earphone type headphones that are not inserted into the protrusions of the external auditory canal. (For example, refer to Patent Document 1). The earphone has a dynamic type of drive unit that causes the vibration plate of the 1 drive unit to vibrate to generate sound. Λ Figure 8 shows a cross-sectional view of a conventional earphone construction. In the figure, the 813 is a rear casing of the earphone, in which the driver unit state is mounted, and the above-mentioned driver unit 84 is fixed by an annular front casing 812 embedded at the front end of the rear casing 8丨3 (the lower end of the figure). The airway-shaped earphone cord holding portion 815 extends from the rear of the rear casing 813, and one end of the earphone cord holding portion 815 is connected to the driver unit 84, and the other end is connected to a music player, a television, and a radio (not shown). , sound card deck and other audio equipment 891 not shown in the figure. Further, the driver unit 841 has a magnet gw for forming a magnetic path, a magnetic plate 844 and a yoke < 845, a diaphragm 846 for forming a vibration system, and a voice coil 847. Specifically, a magnetic plate 844 and a yoke 845 are fixed to both sides of the disk magnet 843. Further, the magnet 843 is a starting magnet. Further, a magnetic gap is formed in the space between the magnetic plate 844 and the magnetic vehicle 845, and the voice coil 847 fixed to the vibrating plate 846 is inserted into the magnetic gap of 201129109. The vibrating plate 846 is a polyester film. Further, a mesh-shaped protective plate 848 having a large number of openings is disposed in front of the earphone, that is, in front of the vibrating plate 846 (below the figure). Further, a through hole 849' is formed in a central portion of the magnet 843, the magnetic plate 844, and the yoke 845, and a resistor 871 made of a foamable urethane or the like is embedded in the through hole 849. Further, a plurality of holes 870 are formed in the driver unit 841. When the earphone is mounted on the concave portion of the auricle, the protective plate 848 disposed in front of the earphone is opposite to the entrance of the external auditory canal, and the sound generated by the vibration of the vibration plate 846 passes through the opening of the protective plate 848 and is incident on the inside of the external auditory canal. Reach the tympanic membrane. PRIOR ART DOCUMENT PATENT DOCUMENT PATENT DOCUMENT PATENT DOCUMENT LIST OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION However, in the aforementioned conventional earphone, since it is attached to the auricle recess, it is worn. The sex difference system is like a walking towel, and when the user reads the state, there is a case where the ear piece is detached from the auricle. X, the positional relationship with the external auditory canal is unstable, and the sound volume and sound quality of the person who shoots the external auditory canal are unstable. There are ear pads made of elastic soft rubber, earphones of the type of ear canal. Since the earphone is worn by the soft ear canal, it can be surely worn on the auricle. Therefore, in recent years, the ear pad which is inserted into the outer soft ear is inserted into the external walking and is not in the 4 201129109 ear. The profile falls off. Further, since the ear pad is made of a material having elasticity, it can be elastically deformed in accordance with the shape of the external auditory canal, and a good wearing feeling can be obtained. However, when the ear pad is inserted into the external auditory canal, the ear pad which is deformed by pressing the external auditory canal intercepts the inside and outside of the external auditory canal, and the sound incident from the earphone to the external auditory canal cannot penetrate to the outside, and the so-called sound penetration is deteriorated. The sound produces an unclear feeling, a blurred feeling, etc., and the sound quality is lowered. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in that an air-adjusting hole is formed in an acoustic space formed in front of and behind a driver unit in a casing, and a diameter is formed in an acoustic space formed at a rear of the driver unit. By adjusting the sound quality adjustment hole of the hole, the sound penetration is good, and the sound with good definition and high-pitched sound can be reproduced, and the earphone with high sound quality and high sound quality can be installed. Means for Solving the Problem Therefore, in the earphone of the present invention, the earphone includes at least a portion of an ear canal insertion member insertable into the external auditory canal, a housing to which the external ear canal insertion member can be mounted, and a housing disposed in the housing a driver unit for generating sound; the housing has a sound guiding hole formed in a front space in front of the driver unit, communicating with a front end of the front space, and allowing sound to enter the external auditory canal, and a space formed behind the driver unit The front space has a front air-conditioning hole that communicates with the outside, and the rear space has a sound-adjusting hole that communicates with the outside, and has a smaller air diameter than the rear air-adjusting hole and communicates with the outside. In another earphone of the present invention, the rear air adjusting hole and the sound quality adjusting hole are disposed on a surface orthogonal to the vibration direction of the vibrating plate of the actuator unit 201129109. In still another earphone according to the present invention, the front space is a truncated cone-shaped space, and the front air adjusting hole is formed to face forward with respect to a surface of the front space facing the driver unit, and the rear space is opposite to the driver unit. In the planar cylindrical space, the rear air adjusting hole and the sound quality adjusting hole are formed to face the side on the cylindrical side surface of the rear space. In still another earphone of the present invention, the diameter of the front air conditioning hole and the diameter of the rear air conditioning hole are equal. In still another earphone of the present invention, the sound quality adjusting hole has a first adjustment hole for controlling the sound quality of the predetermined sound range; and a second diameter smaller than the first adjustment hole, and controls the sound quality of the lower sound side than the predetermined sound range. Adjust the hole. According to the present invention, the earphones are housed in the casing, and air adjustment holes are formed in the acoustic spaces formed in front of and behind the driver unit, respectively, and sound quality smaller than the air adjustment holes is formed in the acoustic space formed behind the driver unit. By adjusting the hole, the sound penetration is good, and the bass with good definition and the high-pitched sound with high brightness can be reproduced, and the wearing feeling is good, and the sound quality can be improved. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a headphone according to a first embodiment of the present invention, and is a partial cut-off view. 2A-E is a five-side view of the earphone according to the first embodiment of the present invention, (A) is a top view, (B) is a left side view, (C) is a rear view, and (D) is a right side view, ( E) Front view. 201129109 Fig. 3 is a cross-sectional view of the earphone according to the first embodiment of the present invention, and is a cross-sectional view taken along the line A-A of Fig. a. (C) The 4A-D diagram is the first invention of the present invention! The four-side view of the ear pad of the embodiment is the left side view '(B) is the rear view, (c) is the right side view, and (9) is the front face. "The 5A-D figure is the ear pad of the third embodiment of the present invention. Cross-sectional view, (8° system 4th (B)® β·Β arrow cross-sectional view '(9) is the 4th (8) figure cc arrow cross-sectional view '(C) is the 4th (C) diagram DD arrow cross-sectional view (9) is a cross-sectional view taken along the line E to E of Fig. 4(c). Fig. 6 is a front view of the earphone according to the second embodiment of the present invention, and is a cross-sectional view of the arrow FF of the seventh (C) drawing. 7A-E shows a five-side view of the earphone according to the second embodiment of the present invention, (A) is a top view, (B) is a left side view, (C) is a rear view, and (P) is a right side view, ( E) is a front view. Fig. 8 is a cross-sectional view showing a conventional earphone structure. C-Bag: The embodiment for carrying out the invention will be described below with reference to the drawings. The perspective view of the earphone according to the first embodiment of the present invention is a cut-off view, the second figure is a five-sided ring of the earphone according to the first embodiment of the present invention, and the third figure is a cross-sectional view of the earphone according to the first embodiment of the present invention. 2(C)_ / AA arrow cross-sectional view. In addition, in Fig. 2, (A) is the above figure '(0) is the left side view, (C) is the rear view, (D) is the right side view, (E) is the system In the figure, the earphones of the present embodiment are mounted on the user's 7 201129109 auricle to drive the sound signal of the electric signal, and the sound signal is reproduced by the small sound generator. The earphone 10 has a casing 11 as a casing in which a driver unit 41 that reproduces sound to generate sound, and is mounted to the casing 11, at least the front end portion 55 of which can be inserted into the external auditory canal of the user as an external auditory canal insertion. The ear piece 5 of the member has the housing 12 having a front housing 12 and a truncated cone rear housing 13 coupled to the rear side of the base portion 12a of the front housing 12, and coupled to the rear housing 13 The side cover is provided with the body 14. Further, as shown in Fig. 3, the driver unit is held in the casing 11 in a state in which the front casing 12 and the rear casing 13 are lost before and after (the upper and lower sides of Fig. 3). The driver unit 41 is a so-called dynamic type, and has the "invention background" The drive unit 841 of the conventional earphone described in the above is the same structure. That is, in the present embodiment, the description of the driver unit 41 follows the description of the driver unit 841 of the conventional earphone. The cover case 14 is sealed, whereby the rear (fourth) 24 of the shape of the truncated cone and the cylinder is formed behind the driver unit 41 in the casing 11 (below the third figure). The fish actuator unit 41 is opposite to the inner surface of the cover housing 14 and is in a plane parallel to the diaphragm of the actuator unit 41. Further, in the example shown, the cover housing 14 is attached to the rear housing. 13 independent ^ components, can also be formed with the ribs - material description shell ^: = = resin composition, can also be made of steel, steel, steel and other metals, 'combined by resin, carbon, metal, etc. Material builder. In the case of the above-mentioned cover ribs, the tubular headphone wire holding portion of the headphone wire 91- portion which is connected to the driver's earphone wire 91 is mounted, and the 5 headphone wire holding portion can also be The cover housing is formed into a body. Further, the headphone cord 91 extends from the lower end of the headphone cord holding portion 15. Further, in the i-th and t-th drawings, the drawing is convenient, the earphone wire 91 is only part of the (four) headphone wire holding portion 15, and the other portions are omitted. Further, the other end of the headphone cord 91, which is not shown in the figure, can be connected to an audio device which is not shown when the music player plays H, television, radio or audio and video card. The front casing η has not only a cylindrical base portion but also a truncated cone-shaped conical portion 16' projecting from the front of the base portion (10) and a pad mounting as a cylindrical insertion member from the front end of the conical portion. with. The diameter of the front end of the conical portion 16 is smaller than the base end (portion connected to the base portion), whereby the front side of the driver unit 4i in the housing U (above the third figure) is formed as a truncated cone space. Space 21. Further, a casing acoustic guide hole 22 as a sound guide hole is formed in the cymbal mounting portion 17 so as to connect the front end to the front opening and the cylindrical opening. Thereby, the sound generated by the driver Cuiyuanyu is guided through the crotch space 21 and the sound of the casing, and is incident on the ear canal of the user. In addition, in the example shown in the figure, the cone (four) is formed such that the axis of the front end thereof is inclined to the right with respect to the base end, and the front axis is inclined to the any direction relative to the base end. It is not necessary to tilt, and the front private batch (4) may be parallel. Also, the front air chamber 25 is formed as a front air adjusting hole for the air adjusting hole having the function of the exhaust port in the front housing=cone 1 δ. The air in the 'front' 21 that communicates the front space 21 with the outside can be discharged to the outside by reducing the round hole that penetrates the conical portion 16. 201129109 Further, the front air passage 25 is formed in a portion of the conical portion 16 near the base portion 12a, that is, a portion formed on the front surface. That is, the front air passage 25 is formed to face forward, and the air in the front space 21 can be discharged toward the front. Further, the diameter of the front air passage 25 is 1.2 [mm], which can be changed in accordance with the performance of the driver unit 41, the size of the front space 21, and the like. Further, a rear air passage 28 as a rear air adjusting hole having a function of an exhaust port is formed in the rear casing 13, as a first adjustment hole 27a and a second adjustment hole 27b of the sound quality adjusting hole. In addition, when the first adjustment hole 27a and the second adjustment hole 27b are collectively described, the sound quality adjustment hole 27 will be described. The rear air passage 28 is formed so as to penetrate the circular hole of the rear casing 13 to communicate the outside space 24 with the outside, and the air in the rear space 24 can be discharged to the outside. Further, the rear air passage 28 is formed at a portion of the rear side of the rear casing 13 toward the side, that is, the rear air passage 28 is formed to face the side, and the air in the rear space 24 can be discharged toward the side. Further, the diameter of the rear air passage 28 is set to be equal to the front air passage 25, and can be changed according to the nature of the actuator unit 41, the size of the rear space 24, and the like. In this way, by disposing the same-diameter exhaust port, that is, the air passage 25 and the rear air passage 28 in the front space 21 and the rear space 24, the distortion and the echo of the sound can be corrected, and the space 21 as the sound space can be improved. And the acoustic performance of the rear space 24. Further, by the δ and the square air passage 25 and the rear air passage 28, the load applied to the diaphragm of the actuator unit 41 can be reduced. Further, the first adjustment hole 27a and the second adjustment hole 27b are formed so as to penetrate the rear casing 13 and have a circular hole having a circular cross section toward the side, and connect the rear space 24 to the outside and to the rear air passage 28, and The same circle 10 of the rear casing 13 is arranged side by side in a row to form a row. Further, the diameter of the adjustment hole 27a is formed smaller than the diameter of the rear air passage 28, and the diameter of the second adjustment hole 27b is formed smaller than the diameter of the first adjustment hole 27a. The diameter of the first adjustment hole 27a is 〇.8 [mm]. By the reason that the diameter of the adjustment hole 27a is such a value, the sound in the middle range, that is, the frequency band centered at 12 〇〇 [Hz] is controlled, the frequency response can be made smoother, and the sound quality can be improved. Further, the diameter of the second adjustment hole 27b is 〇_4 [mm]. By the diameter of the second adjustment hole 27b, by controlling the low-range sound, that is, the sound band of the frequency band centered at 2 〇〇 [Hz], the frequency response can be made smoother, and the sound quality can be improved. Further, in the example shown in the figure, the sound quality adjustment hole 27 is the second adjustment hole 27a and the second adjustment hole 27b, and the sound quality adjustment hole 27 may be one or more than three or more depending on the frequency band to be controlled. . Further, the diameter of the sound quality adjusting hole 27 can be changed in accordance with the frequency band of the sound to be controlled. That is, in order to control the sound of the lower band, the diameter of the sound quality adjusting hole 27 may be reduced. To control the sound a of the higher frequency f, the diameter of the sound quality adjusting hole 27 may be enlarged. Further, an ear pad 5 is attached to the above-described cymbal mounting portion 17. The deafness % is composed of a soft elastically deformable material such as rubber, and the body-formed member has a cylindrical body portion 51 around the pad portion 17 from the other end of the body portion 51. The umbrella-shaped portion 53 which is an elastically deformable body which is extended obliquely at the end is further provided with a flange-shaped engaging convex portion 52 having a thickness which protrudes toward the (four) at the end shaft of the main body portion. The engagement convex portion is formed to form (4) the misalignment concave portion m of the base end portion (the connection portion with the front end of the conical portion 16) of the attachment portion n is engaged with each other to prevent the ear (four) (four) attachment portion i7 from falling off. The d-ear pad 50 has a shape resembling a scent or an umbrella, and is formed at the front end portion of the front end portion 201129109 &"" at the front end of the umbrella portion 53, between the outer peripheral surface of the body portion and the inner peripheral surface of the umbrella portion 53. There is a cavity portion 65. Further, the center of the body portion 51 is formed with a pad sound guiding hole 61 as a sound guiding hole for a cylindrical opening opened at the front and rear ends. The sound guiding hole 61 communicates with the housing sound guiding hole 22 in the state in which the pad is mounted and mounted. Further, the umbrella portion 53 has a truncated cone-shaped front half portion 朝 which extends rearward, and the cylindrical rear half portion of the half portion 53a extends rearward and is thinner than the reading portion 51, and has a recordability. Acceptance = quantity, and easy to deform. Therefore, when the deafness is inserted into the shape of the inner surface of the external auditory canal, the shape of the inner surface of the external auditory canal is not formed, and the reaction force is not applied to the inner surface of the external auditory canal, so that the wearing feeling and the appropriate feeling are good. ^ 'The material part of the reading part 53...forms the money side to view the extension I. A plurality of (the money shown in the figure is 6). The user who wears the slit-shaped opening is wearing the earphone _, and the ear (four) is inserted into the external auditory canal to Outside the umbrella: Interrupting the inside and outside of the external auditory canal 'However, because the opening is present, the sound can still enter the inside of the external auditory canal and reach the tympanic membrane; ^ :. And 'because the air inside the external auditory canal passes through the opening &, penetrates to: 2. Therefore, the two guide holes 61 from the driver unit 41 via the housing sound guide hole can be reduced, and the sound is read to the sound of the sound, so the bass The resolution is good and the middle and high notes are bright. Further, the driver has a single tearing sound (10) side, so that the input (10) is also preferably provided on the outer peripheral surface of the main body portion 51, and is formed in the front-rear direction, that is, in the front-rear direction, that is, in the axial direction of the main body portion 51. g is the ditch 63 of the ditch. Therefore, when the ear pad 5〇 is inserted into the external auditory canal, the fly 吏t becomes deformed by the abundance 53 and is pressed to the center of the outer peripheral surface of the body portion; the opening. The cymbal 62 and the corresponding pad 63 are overlapped with each other, so that the communication between the inside and the outside of the external auditory canal can be maintained. At least the surface of the conical portion 16 of the body 12 at the month j λ is connected to the 塾安农部. In the vicinity of the cymbal, a housing groove 1 as a groove extending in the direction of the moon j, that is, the axial direction of the conical portion 16, is formed at a position corresponding to the surface 63, and the front end of the clam shell groove 31 and the pad 63 are formed. The end is connected, and 'extends to the end of the money department 53 to pay back; T. Therefore, when the deafness 50 is inserted into the external auditory canal, even if the formation of the umbrella portion 53 is deformed, it is pressed not only to the outer peripheral surface of the main body portion 51 but also to the state of the conical portion due to the opening. P62 is interconnected with the corresponding pad 63 and the shell material, so that the communication between the inside and outside of the external auditory canal can be maintained. Next, the structure of the aforementioned ear pad 50 will be described in detail. Fig. 4 is a four-side view of an ear pad according to a first embodiment of the present invention, and Fig. 5 is a cross-sectional view of the ear pad according to the first embodiment of the present invention. In addition, in Fig. 4, (A) is the left side view, and (B) is the rear view '(the right side view of the 〇 system, the front view, the fifth picture, (A) is the BB of the 4th (B) figure. Arrow cross-sectional view, (b) is the CC arrow view of the 4th (B) figure '(C) is the D_D arrow cross-section of the 4th (C), and (D) is the 4th (C) The main body portion 51 is connected to the front end connecting portion 54 at the front end of the umbrella portion 53, and the front end of each opening portion 62 communicates with the front end of the sound guiding hole 61 through the communicating concave portion 64. 'In the circumferential front end portion 55 of the ear pad 50, the front end connection 13 201129109 portion 54 is alternately disposed with the communication concave portion 64. Therefore, the driver unit "passes the housing sound guide hole 22 and the squeaking sound guide hole 6 to the external auditory canal." Since the internal sound penetrates from the opening portion 62 to the outside by connecting the concave portion 64, it can be reduced in lightness, unclearness, etc., and bright. Further, as shown in Fig. 5(A), the front end The connecting portion 54 is thicker than the umbrella portion 53 and has a higher rigidity than the umbrella portion 53' and is not easily deformed. Further, the communicating concave portion 64 disposed between the front end connecting portions 54 is viewed from the side to form It is recessed to the rear end edge of the front end portion 55, that is, the front end edge of the front end connecting portion 54. Therefore, when the ear pad 50 is inserted into the external auditory canal, even if the umbrella portion 53 is deformed, the communicating concave portion 64 is not closed. Further, as described above, even if the formation of the umbrella portion 53 is deformed, it is pressed not only to the outer peripheral surface of the main body portion 51 but also to the surface of the conical portion 16, and the opening is opened. The portion 62, the sulcus 63, and the casing groove 31 are still connectable. Therefore, the sound from the pad sound guiding hole 61 via the communicating concave portion 64, the opening portion 62, the sulcus 63, and the casing groove 31 can be stably ensured to the outside. Since the passage is stable, the low-pressure sensation, the unclear feeling, and the like can be stably reduced, and the sound quality can be maintained. Further, as shown in Fig. 5(B), the opening portion 62 is preferably formed at the front end and the front end of the pad 63. At this time, even if the umbrella portion 53 is largely deformed, the communication between the opening portion 62 and the pad groove 63 can be maintained. Further, as shown in Fig. 4(D), the front half portion 53a of the umbrella portion 53 is formed. There are a plurality of slit-like openings 62 extending radially from the front. Therefore, Due to the presence of the opening portion 62, the rigidity of the front half portion 53a is lowered and the deformation is easy. When the ear pad 50 is inserted into the external auditory canal, not only the front half portion 53a but also the entire umbrella portion 53 is elastically elastically deformed, and is suitable for the inner surface shape of the external auditory canal. Therefore, 14 201129109 does not cause damage to the external auditory canal, and the safety is high. The umbrella-shaped portion 53 does not exert a reaction force on the inner surface of the external auditory canal and can be closely fitted, so that the wearing feeling and the appropriate feeling are good. In the illustrated example, the number of the opening portion 62, the pad groove 63, the case groove 31, and the communication recess portion 64 is six, which is not necessarily six, and may be five or less, or seven or more. Next, a second embodiment of the present invention will be described. It is to be noted that the same reference numerals are given to the same components as those of the first embodiment, and the description thereof will be omitted. The description of the same operations and the same effects as those of the first embodiment will be omitted. Fig. 6 is a cross-sectional view of the earphone according to the second embodiment of the present invention, and is a cross-sectional view taken along line F-F of Fig. 7(C), and Fig. 7 is a view showing a five-side view of the earphone according to the second embodiment of the present invention. In addition, in Fig. 7, (A) is a top view, (B) is a left side view, (C) is a rear view, (D) is a right side view, and (E) is a front view. In the present embodiment, the casing 11 has a casing 12 on the front side thereof and a conical rear casing 133 coupled to the rear side of the base portion 12a of the front casing 12. Further, as shown in Fig. 6, the driver unit 41 is held in the casing 11 in a state in which the front casing 12 and the rear casing 133 are sandwiched by the front casing 12 and the rear casing 133 (above and below the sixth drawing). Further, the rear case 133 is a conical member that is hermetically closed at the rear end and has a sharp shape. Thus, the rear of the driver unit 41 in the casing 11 (below the sixth drawing) is formed into a conical space. Space 244. Further, the casing 11 is made of a resin such as synthetic resin. Further, the mounting protrusion 13c formed to protrude from the conical side surface of the rear case 133 to the outside is attached with a flat rectangular parallelepiped wire holding portion that is connected to one end of the driver unit 41 15 201129109 ΠΓ1. The earphone cord holding portion 15 may be formed with the rear case_. Further, the earphone wire Chen earphone cord scale 15 is extended. The front casing 12 has not only a cylindrical base portion 12a: a relatively flat circular disk in front of the element 41: a circular plate: a cylinder of 7 "mounting (4). The front phase plate (4) (4) is the front side of the shell Zhaou, thereby being in front of the driver unit 41 in the casing U (the sixth figure is formed into a cylindrical shape having a short upper and lower dimension or a space which is shaped like a space of __down_ (4) In the above-mentioned cymbal mounting portion 19, a housing sound guide hole 22 is formed as a sound guide hole for the rear end of the front end 21 and the front end of the front portion 21, and the sound generated by the driver unit 41 passes through the front space. 21 and the housing sound guide hole 22, the person is shot to the user. Further, in the example shown in the figure, the cymbal mounting portion 19 is formed with its axis centered on the axis of the front housing 12 and the driver unit 41. The axis of the shaft is tilted to the right, and the pad mounting portion 19K can be (4) the axis of the front housing 12 and the axis of the driver unit 4i, tilted to any direction, and does not need to be tilted, and the axis of the mounting portion 19 The core may be parallel to the axis of the front casing 12 and the axis of the actuator unit 41. Further, the trunk 12 is formed with a front air passage 25 as an air adjusting hole having a function of an exhaust port. The hole is formed in a circular shape penetrating through the circular plate portion 18, and communicates with the front space 21 and the outside. The air in the front space 21 can be discharged to the outside. Further, the front air passage 25 is formed to face the front side, and the air in the front space 21 can be discharged toward the front. Further, the conical side surface of the rear casing 133 is formed to have a row. The rear air passage 28 of the air adjusting hole having the function of the air outlet 16 201129109, the first adjusting hole 27a as the sound quality adjusting hole, and the two second adjusting holes 27b. The rear air passage 28 is formed to penetrate the conical side surface of the rear housing I3. The circular hole in the cross section communicates the rear space 24 with the outside. The air in the rear space 24 can be discharged to the outside. Further, the rear air passage 28 is formed to face the oblique rear side, and the air in the rear space 24 can be discharged obliquely rearward. Further, the first adjustment hole 27a and the second adjustment hole 27b are formed so as to penetrate the conical side surface of the rear case 13, and have a circular hole having a circular cross section, and connect the rear space 24 to the outside and the rear air passage. 28 are adjacent to each other and arranged in a row on the same circumference of the rear casing 13. In the second embodiment, the two second adjustment holes 27b are arranged in the shape of the rear casing 133 and the first embodiment. The difference is a conical shape, and the acoustic characteristics of the rear space 244 are different from those of the rear space 24, and the low-range is controlled by the number of holes. In the present embodiment, the ear pad 50 is directly attached to the pad mounting portion 19. Specifically, the card The convex portion 52 is engaged with the groove-shaped engaging recess portion 19a formed in the pad attaching portion 19, and the ear pad 50 can be prevented from falling off from the pad attaching portion 19. The ear pad 5 of the present embodiment does not have the opening portion 62 and The pad groove 63. That is, in the present embodiment, the opening portion 62 and the pad groove 63 are omitted. Thus, in the present embodiment, the earphone 1 includes at least a portion of the ear pad 5, which can be inserted into the external auditory canal, and can be mounted. The housing 11 of the ear pad 50 and the driver unit 41 disposed in the housing n to generate sound, the housing u having a front space 21 formed in front of the driving unit 41 and communicating with the front end of the front space 21 to make a sound The housing sound guide hole 22 incident on the external auditory canal and the rear space 24 formed in the rear of the driver unit 41, the front space 21 has a square air passage 25 before communicating with the outer portion 17201129109, and the rear space 24 has an air passage 28 after communicating with the outside, and Diameter later The airway 28 is small and is connected to the external sound quality adjustment hole 27. Thereby, the air balance between the front space 21 and the rear space 24 can be appropriately adjusted, and the load applied to the diaphragm of the actuator unit 41 can be reduced. In addition, the distortion and echo of the sound can be corrected, and the sound quality can be improved. Furthermore, both the treble and the bass are smooth, and the sound is made to be open. In other words, the sound quality adjusting holes 27 determine the sound range to be controlled based on the straight diameter of the hole, and control the characteristics according to the number, and adjust the air balance related to the sound opening feeling. Further, after the side surface portion 13b of the rear case 13, the air passage 28 and the sound quality adjusting hole 27 are disposed on the same circumference, that is, on the imaginary plane orthogonal to the vibration direction of the vibration plate of the driver unit, and at the distance from the vibration plate. The adjustment holes are arranged at the same position, and the sound can be controlled more effectively. Further, in the first embodiment, the front space 21 is a truncated cone-shaped space, and the front air passage 25 is formed to face the front surface of the front space 21 facing the driver unit 41, and the rear space 24 is opposed to the driver unit 41. In the planar cylindrical space, the rear air passage 28 and the sound quality adjusting hole 27 are formed toward the side edges on the cylindrical side surface of the rear space 24. Thereby, the sound is excellent in penetration, and the bass with good definition and the high-pitched high-pitched sound can be reproduced. Furthermore, the diameter of the front air passage 25 is equal to the diameter of the rear air passage 28. Thereby, the air balance between the front space 21 and the rear space 24 is good. Further, the sound quality adjusting hole 27 has a first adjustment hole 27a for controlling the treble sound quality, a second adjustment 18 201129109 hole 27b having a smaller diameter than the first adjustment hole 27a and controlling the bass sound quality. Thereby, the sound quality of the desired frequency band can be appropriately controlled. In the second embodiment, the casing U has a cylindrical front space 21 formed on the shaft side, and a housing sound guide hole & that is connected to the front ear canal to the external auditory canal; After the square _4, and 1, _ square space 24 has a sound quality adjustment hole that faces the obliquely rear opening... So, because of the housing driver star
形成於其前後之前方 1及後方工間24具有音質調整孔27，故可以該音質調 整孔27 ,適當地控制所期頻帶 /曰、D 響特性。 V之“，而可獲得良好之音 再者’前方空間21之與驅動器單 面，前方空間21具有朝向前方開口之前方氣道25，後= 間24之與驅動器單元41相對之面係圓錐狀面，後方，門2工4 具有朝向斜後方開D之後方氣道28。可改正聲立之 =及回音’x’f施加於驅動器單元41之振城之 貝。 物刚，爾本發明之 曰趣，進订各種㈣等從本發明之 產業上之可利用性 讲咏考。 本發明可適用於具有至少1份插入至外耳道之外耳 道插入構件之耳機。 耳 【圖式^簡翠_ 明】 第！圖係本發明第i實施形態之耳機^Since the front side 1 and the rear side 24 are formed with the sound quality adjusting holes 27, the sound quality adjusting hole 27 can be adjusted to appropriately control the desired band/曰 and D characteristics. V ", and a good sound can be obtained." The front space 21 and the driver are single-sided, the front space 21 has a square air passage 25 that faces the front opening, and the rear surface 24 has a conical surface opposite to the driver unit 41. , rear, door 2 work 4 has a square air passage 28 after opening obliquely rearward D. The sound can be corrected = and the echo 'x' f is applied to the vibration of the driver unit 41. The object is just interested in the invention. The invention can be applied to an earphone having at least one part of an ear canal insertion member inserted into the external auditory canal. The ear [图式^简翠_明] The figure is the earphone of the i-th embodiment of the present invention^
份截斷圖。 马。P 19 201129109 第2A-E圖係本發明第1實施形態之耳機之五面圖，（A) 係上面圖’（B)係左側面圖’（C)係背面圖，（D)係右側面圖， (E)係正面圖。 第3圖係本發明第1實施形態之耳機之截面圖，為第2(c) 圖之A-A前視截面圖。 第4A-D圖係本發明第1實施形態之耳墊之四面圖，（a) 係左側面圖’（B)係背面圖，（〇係右側面圖，（D)係正面圖。 第5A-D圖係本發明第1實施形態之耳墊之截面圖，（a) 係第4(B)圖之B-B箭視戴面圖，（B)係第4(B)圖之C-C箭視截 面圖，（C)係第4(C)圖之D-D箭視截面圖’（D)係第4(c)圖之 E-E箭視截面圖。 第6圖係本發明第2實施形態之耳機之截面圖，為第7(c) 圖之F-F箭視截面圖。 第7 A-E圖係顯示本發明第2實施形態之耳機之五面 圖’（A)係上面圖’（B)係左側面圖，（C)係背面圖，（d)係右 側面圖，（E)係正面圖。 第8圖係顯示習知耳機構造之截面圖。 15，815…耳機線保持部 16.. .圓錐部 17.. .墊安裝部 17a...卡合凹部 18.. .圓板部 19.. .墊安裝部 【主要元件符號說明】 10··.耳機 11.. .殼體 12.. .前殼體 12a...基部 13，133...後殼體 H...蓋殼體 20 201129109 19a...卡合凹部 55...前端部 21...前方空間 61...墊聲音導孔 22...殼體聲音導孔 62...開口部 24，244...後方空間 63...墊溝 25...前方氣道 64...連通凹部 27...音質調整孔 65...空洞部 27a...第1調整孔 91，891..·耳機電線 27b...第2調整孔 812...前部殼 28...後方氣道 813…後部殼 31...殼體溝 843...磁鐵 41，841…驅動器單元 844...磁板 50...耳墊 845...磁輛 51...本體部 846...振動板 52...卡合凸部 847...音圈 53...傘狀部 848...保護板 53a...前半部 849...貫穿孔 53b...後半部 870··.孔 54...前端連接部 871...電阻材 21Partial cutoff. horse. P 19 201129109 2A-E is a five-side view of the earphone according to the first embodiment of the present invention, and (A) is a rear view of the left side view (C) of the above figure (B), and (D) is a right side face. Figure, (E) is a front view. Fig. 3 is a cross-sectional view of the earphone according to the first embodiment of the present invention, and is a front cross-sectional view taken along line A-A of Fig. 2(c). 4A-D is a four-side view of the earpad according to the first embodiment of the present invention, and (a) is a rear view of the left side view (B), (the right side view of the 〇 system, and the front view of (D). -D is a cross-sectional view of the ear pad according to the first embodiment of the present invention, (a) is a BB arrow surface view of the fourth (B) figure, and (B) is a CC arrow section of the fourth (B) figure. Fig. 6(C) is a cross-sectional view taken along the line DD of Fig. 4(C), and Fig. 6 is a cross-sectional view of the earphone of Fig. 4(c). Fig. 6 is a cross section of the earphone according to the second embodiment of the present invention. Fig. 7 is a cross-sectional view of the arrow FF of Fig. 7(c). Fig. 7AE is a left side view showing a five-side view of the earphone (A) of the second embodiment of the present invention. (C) is a rear view, (d) is a right side view, and (E) is a front view. Fig. 8 is a cross-sectional view showing a conventional earphone structure. 15,815... Headphone wire holding portion 16. Conical portion 17 .. Pad mounting portion 17a... Engagement recess 18.. Disc portion 19.. Pad mounting portion [Main component symbol description] 10··. Headphones 11.. . Housing 12: Front housing Body 12a... base 13, 133... rear housing H... cover housing 20 201129109 19a... engagement recess 55... front end 21... front space 61... pad sound guide hole 22... case sound guide hole 62... opening portion 24, 244... rear space 63... pad groove 25... front air passage 64 ...connecting concave portion 27...sound quality adjusting hole 65...cavity portion 27a...first adjusting hole 91,891..·earphone wire 27b...second adjusting hole 812...front case 28 ...rear air passage 813...rear door 31...case groove 843...magnet 41,841...drive unit 844...magnetic plate 50...ear pad 845...magnetic 51...body 846...vibration plate 52...engagement convex portion 847...voice coil 53...umbrella portion 848...protective plate 53a...front half portion 849...through hole 53b... Rear half 870··. hole 54... front end connecting portion 871...resistive material 21