200904601 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種氣密組，特別是指一種具有氣密 效果的打釘搶的氣密裝置。 【先前技術】 參閱圖1，以一般打釘槍丨為例，主要包含有一殼體u 、一汽缸12、一頂内座13及一襯墊14。該汽缸12是限位 在該殼體11内，並具有可進、出氣壓的一開口 121。該頂 内座13是可卸離地封閉該汽缸12開口 121，並具有形成在 一端面131且相對該汽缸12開口 121突出的—環肋η〕， 及貫穿該環肋132的一氣孔133。該襯墊14是環繞在該頂 内座13的環肋132與端面131間，且與該汽缸12開口 ΐ2ι 氣密接觸，使該汽缸12達到氣密效果。 惟，由於重量輕量化及體積小巧化一直是消費者最迫 切的需求選項，因此，如何在不影響使用性能的情形下， 縮減組件的體積是一種趨勢，但是，該頂内座13為了能套 置該襯墊14而突設有-環肋132，且為了避免有氣體殘存 在該襯墊14與該環肋132間，必須開設可供氣體排出的氣 孔133，不但有額外套置該襯塾14的組裝程序，及開設該 氣孔133的加工程序，且該環肋132的設置，導致該殼體工 '、、^頁配s。亥頂内座13而擴增長度，使該打釘搶丨整體的體 積無法有效縮減。 參閱圖2，另以美國專利第5715986號之打釘搶5為例 ，同樣包含有一殼體51、一汽缸52、一頂内座53及一環 200904601 形襯塾54。不同處在於：該頂内座53更具有形成在一頂面 的-環槽532。該襯墊54是部分容置在該頂内座μ的 W曰532内。藉此，同樣可與該汽紅52氣密接觸，使該汽 紅52達到氣密效果。 准由於°亥襯墊54是另外安裝在該頂内座53的環槽 532内，因此，該頂内座53除了必須預先開設有環槽μ] ^必須再有結合該襯墊54與該頂内座53環槽M2的組 K序，不但會提昇組裝成本’且因為該殼體51内充斥有 南壓低溫的氣體，該襯墊54很容易在作動過程中脫落，造 成使用時的不便與困擾。 【發明内容】 —、、因此，本發明之目的，即在提供一種能簡化製程，及 縮減整體體積的打釘搶的氣密裝置。 於疋，该打釘搶的氣密裝置包含一頂内座及一緊迫件 。該頂内座是可卸離地與—汽缸對合，並具有緊迫該汽缸 :-端面。該緊迫件是與該頂内座—體射出成，並具有 嵌埋在該頂内座端面内的一埋置部，及顯露在該頂内座端 面且與該汽缸氣密接觸的—迫壓部。 本發明的功效是利用嵌埋式的緊迫件簡化與該頂内座 結合時的製程’並減少#用的高度空間’而能縮減該頂内 座整體的體積。 【實施方‘式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合芩考圖式之—個較佳實施例的詳細說明中，將可 200904601 清楚的呈現。 麥閱圖 平乂住貫施例更 安裝在一打釘槍2。該打釘槍2包含一外殼21，及限位在 該外殼21内的-汽虹22。該汽紅22具有環繞—軸線且界 定出一開口 221的一圍繞壁222。該氣密裝置包含一頂内座 3及一緊迫件4。 該頂内座3在本較佳實施例是以聚縮醛材料（p〇iyacetai ，POM)射出成型，且可卸離地與該汽缸22圍繞壁222對合 ’並具有緊迫該汽缸22圍繞壁222的一端面31。 該緊迫件4在本實施例是以聚氨基甲酸乙酯材料 (Polyurethane ’ PU)製成一環形體後，預先置入射出該頂内 座3的一模具（圖未示）後，與該頂内座3 一體射出成型。該 緊迫件4具有嵌埋在該頂内座3端面31内的—埋置部41， 及顯露在該頂内座3端面31且與該汽缸22圍繞壁222氣 密接觸的一迫壓部42。該埋置部41嵌埋在該頂内座3端面 31内的深度界於2.5_3 5mm。該迫壓部42突出該頂内座3 端面31的高度界於〇 4_〇 6ππη。 藉此’該頂内座3可受氣壓作用，脫離該汽缸22供氣 壓進入該汽缸22内，或與該汽缸22圍繞壁222對合後， 以顯露在該端面31的緊迫件4迫壓部42與該汽缸22圍繞 壁222氣密接觸’使該頂内座3封閉該汽缸22的開口 221 ’並提供該汽缸22所需的氣密效果。 由於該緊迫件4是以該埋置部41嵌埋在該頂内座3内 因此’在同樣結合有該緊迫件4的情形下，該頂内座3 200904601 可乂省略如圖1所不該環肋132之構造，而能大幅縮減該 、座及轴線方向的長度，進而縮減該外殼整體的 體積。 且本發明可以在射出成型該頂内座3日寺，就與該緊迫 件4體成型，可以省略如圖i所示的先前技術，必須有 套合：襯套14與該頂内座13的程序，並省略如圖2所示 的先月）技#ί A須有、组裝該襯套54與該頂内座Μ，及開設 環槽532的程序，藉此，不但能簡化製程及組裝程序，且 能有效提昇該緊迫件4與該頂内座3結合時的穩固性。 據上斤述可知，本發明之打釘搶的氣密裝置具有下列 優點及功效： 1、由於本發明的頂内座3與緊迫件4是―體射出成型 ，因此’不需要管控該緊迫件4的尺寸精度，也不需要開 Τ與該頂内座3配合的環肋或環槽或氣孔，不但可以大幅 縮減該頂内座3沿該站綠士· a & e + /口為軸線方向的長度，進而縮減該外殼2ι 整體的體積，使本發明更具有實用效益，I能簡化製程、 省略組裝程序，並降低組裝成本。 2、且一體成内座3與緊迫件4可以得到較佳的 緊密度…° °14，不谷易因為作動時的高>1低溫氣體流經 而易位或脫落，而能延E蚀田喜人 此、長使用舞命，並有效提昇與該汽缸 22對合時的氣密效果。 以上所述只是本發明之較佳實施例而已，當不能以此 限定本發明實施之範圍，即大凡依本發明申請專利範圍及 發明說明内容所作之簡單的等效變化與修飾，皆仍屬本發 200904601 明專利涵蓋之範圍内。 9 200904601 【圖式簡單說明】 圖1是一剖視圖，說明一般的打釘搶； 圖2是一剖視圖，說明美國專利第5715986號案； 丄圖3是-剖視圖，說明本發明_打釘槍的氣密裝置的 一較佳實施例；及 圖4是該較佳實施例的另—剖視圖。 10 200904601 【主要元件符號說明】 2 ..........打釘槍 21 .........外殼 22 .........汽缸 221 .......開口 222 .......圍繞壁 3 ..........頂内座 31.........端面 4 ..........緊迫件 41 .........埋置部 42 .........迫壓部 11200904601 IX. Description of the Invention: [Technical Field] The present invention relates to an airtight group, and more particularly to an airtight device with a gas-tight effect. [Prior Art] Referring to FIG. 1, a general nail gun is used as an example, and mainly includes a casing u, a cylinder 12, a top inner seat 13 and a gasket 14. The cylinder 12 is constrained within the housing 11 and has an opening 121 through which air pressure can be introduced. The top inner seat 13 detachably closes the opening 121 of the cylinder 12 and has a ring rib η formed on an end surface 131 and protruding toward the opening 121 of the cylinder 12, and an air hole 133 extending through the ring rib 132. The gasket 14 is disposed between the annular rib 132 and the end surface 131 of the top inner seat 13 and is in airtight contact with the opening ι2 of the cylinder 12 to achieve an airtight effect. However, because of the light weight and compact size, it has always been the most urgent demand option for consumers. Therefore, how to reduce the volume of the component is a trend without affecting the performance. However, the top inner seat 13 is capable of covering. The gasket 14 is provided with a ring rib 132, and in order to prevent gas from remaining between the gasket 14 and the ring rib 132, a gas hole 133 for gas discharge must be opened, and the liner is additionally placed. The assembly procedure of 14 and the processing procedure for opening the air hole 133, and the arrangement of the ring rib 132, causes the housing to be s. The ceiling is enlarged by the inner seat 13 and the overall volume of the nail is not effectively reduced. Referring to Fig. 2, another example is the nailing 5 of U.S. Patent No. 5,715,986, which also includes a casing 51, a cylinder 52, a top inner seat 53 and a ring 200904601 shaped lining 54. The difference is that the top inner seat 53 has a ring groove 532 formed on a top surface. The pad 54 is partially received in the W 532 of the top inner seat μ. Thereby, the vapor red 52 can also be in airtight contact, so that the vapor red 52 can achieve an airtight effect. The top inner pad 53 is additionally mounted in the ring groove 532 of the top inner seat 53. Therefore, the top inner seat 53 must be pre-opened with a ring groove. The group K sequence of the inner ring 53 ring groove M2 not only increases the assembly cost 'and because the casing 51 is filled with a gas having a low pressure in the south, the pad 54 is easily detached during the operation, causing inconvenience in use and Troubled. SUMMARY OF THE INVENTION - Therefore, it is an object of the present invention to provide an airtight device that can simplify the process and reduce the overall volume of the nail. Yu Yu, the nail-tight airtight device includes a top inner seat and a pressing part. The top inner seat is detachably coupled to the cylinder and has the cylinder: - end face. The pressing member is formed from the top inner seat body and has an embedded portion embedded in the end surface of the top inner seat, and is exposed to the end surface of the top inner seat and is in airtight contact with the cylinder. unit. The effect of the present invention is to reduce the volume of the entirety of the top inner seat by simplifying the process 'and reducing the height space used by the use of the embedded type of pressing member. [Embodiment] The foregoing and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the drawings. Mai Yuetu Ping Yi lived in a special case installed in a nail gun 2. The nail gun 2 includes a casing 21 and a steam rainbow 22 that is constrained within the casing 21. The vapor red 22 has a surrounding wall 222 that surrounds the axis and defines an opening 221 . The airtight device includes a top inner seat 3 and a pressing member 4. The top inner seat 3 is injection molded from a polyacetal material (POM) in a preferred embodiment, and removably detachably engages the cylinder 22 around the wall 222 and has a pressure surrounding the cylinder 22 One end 31 of 222. In this embodiment, after the annular member is made of a polyurethane material (Polyurethane 'PU), a die (not shown) of the top inner seat 3 is placed in advance, and the top portion is The seat 3 is integrally injection molded. The pressing member 4 has an embedding portion 41 embedded in the end surface 31 of the top inner seat 3, and a pressing portion 42 exposed on the end surface 31 of the top inner seat 3 and in air-tight contact with the cylinder 22 around the wall 222. The depth of the embedded portion 41 embedded in the end surface 31 of the top inner seat 3 is 2.5 mm to 5 mm. The pressing portion 42 protrudes from the end surface 31 of the top inner seat 3 by a height 〇 4_〇 6ππη. Thereby, the top inner seat 3 can be subjected to air pressure, and the air pressure is released from the cylinder 22 into the cylinder 22, or after the cylinder 22 is engaged with the wall 222, to be exposed to the pressing portion 4 of the end surface 31. 42 in airtight contact with the cylinder 22 about the wall 222 'closes the top inner seat 3 to the opening 221 ' of the cylinder 22 and provides the desired airtight effect of the cylinder 22. Since the pressing member 4 is embedded in the top inner seat 3 by the embedding portion 41, the top inner seat 3 200904601 can be omitted as shown in FIG. 1 in the case where the pressing member 4 is also coupled. The structure of the ring rib 132 can greatly reduce the length of the seat and the axial direction, thereby reducing the overall volume of the outer casing. Moreover, the present invention can be formed by molding the top inner seat 3 day temple, and the pressing member 4 can be formed. The prior art as shown in FIG. 1 can be omitted, and there must be a fit: the bushing 14 and the top inner seat 13 The procedure, and omitting the first month of the technique shown in FIG. 2, requires the assembly of the bushing 54 and the top inner seat, and the opening of the ring groove 532, thereby simplifying the process and assembly process. Moreover, the stability of the pressing member 4 when combined with the top inner seat 3 can be effectively improved. According to the above, the airtight device of the nailing of the present invention has the following advantages and effects: 1. Since the top inner seat 3 and the pressing member 4 of the present invention are "body injection molding", it is not necessary to control the pressing member. The dimensional accuracy of 4 does not need to open the ring rib or ring groove or air hole that cooperates with the top inner seat 3, which can not only greatly reduce the axis of the top inner seat 3 along the station, the green &a; e + / port as the axis The length of the direction, which in turn reduces the overall volume of the outer casing 2, makes the invention more practical, and can simplify the process, omit the assembly process, and reduce the assembly cost. 2, and integrated into the inner seat 3 and the pressing member 4 can get better tightness ... ° °14, not easy to move because of the high degree of operation > 1 low temperature gas flowing through the translocation or shedding, and can delay E erosion Tian Xiren used this and used the dance life to effectively improve the airtight effect when the cylinder 22 was engaged. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are still It is within the scope of the patent issued by the patent number 90904601. 9 200904601 [Simplified illustration of the drawings] Fig. 1 is a cross-sectional view showing a general nailing; Fig. 2 is a cross-sectional view showing a case of U.S. Patent No. 5,715,986; and Fig. 3 is a cross-sectional view showing the present invention A preferred embodiment of the airtight device; and Figure 4 is another cross-sectional view of the preferred embodiment. 10 200904601 [Description of main component symbols] 2 ..........nail gun 21 ......... casing 22 ......... cylinder 221 ..... .. opening 222 ....... around the wall 3 .......... top inner seat 31 ... ... end face 4 .......... pressing Piece 41 ... ... embedding portion 42 ... ... pressing portion 11