五、 [0001] [0002] 新型說明： 【新型所屬之技術領域】 本創作係為一種滚珠螺桿之配件，尤指一種具套疊 式防塵裝置之滾珠螺桿。 【先前技術】 請參閱圖一至圖三所示，係為目前業界常使用的具 堆疊式防塵裝置之滾珠螺桿，係包含：一螺桿（1 )，其 設有螺旋狀之滚動溝（11); 一螺帽（2)，其設有一供 該螺桿（1)穿設之穿孔（21)，該穿孔（21)内緣設有 相對該滾動溝（11)之滾動槽（211)，該滾動溝（11) 及滾動槽（211)之間係設置複數個滾動體（未顯示）， 且該穿扎（21)之兩端係分別設有一安裝槽（22);兩 組套件（3) ’其設有一固定端（31)，藉由該固定端（ 31 )套设於該安裝槽（2 2 )後，並藉由螺絲由螺帽（2 ) 徑方向鎖固該固定端（31 )，使該組套件（3)固定於該 螺帽（2) ’該組套件（3)另設有一穿孔（32)，該穿 Λ 孔（32)除了供該螺桿（1 )穿設外，該穿孔（32)另設 有一容置部（321);兩第一防塵件（4)，其分別組設 於該容置部（321 )’該第一防塵件（4)係設有一第一 通孔（41)，該第一通孔（41)係設有朝該滾動溝（Η )凸伸設置.的第一唇部（411 )，該第一唇部（411 )係 容設於該滾動溝（11)中；兩第二防塵件（5)，其分別 組設於該容置部（321)，該第二防塵件（5)係堆疊於 該第一防塵件（4)上（如圖三所示），該第二防塵件（ 5)係設有一第二通孔（51)，該第二通孔（51)係設有 表單編號Α0101 第3頁/共20頁 M424414 朝該滾動溝（li)凸伸設置的第二唇部（5ιι)，該第二 唇部（5⑴係容設於該滾動溝⑴）中，該第二防塵件 ⑴另設有一凹槽（52)及複數個切槽（53)，各該切 槽（53)係環狀間隔陣列設置於該第二防塵件⑸的端 部，使該第二防塵件⑸的端部形成複數個凸塊（⑷ ’該凹槽（52)係鄰設於該切槽（53);兩彈套件⑷ ，係為-具有雜之環狀體，該彈套件（6)係套設於該 凹槽（52)中’藉由該彈套件（6)施以該凸塊（⑷束 緊力，使該凸塊（54)之第二唇部（511)與螺桿⑴ 表面的間隙縮小’當有遇到異物時，該異物會因為該第 二辱部（511)的阻擋而順著該切槽（53)排出該螺桿（ 1)表面而達到防塵效果，藉由將該組套件（3)、第一防 塵件（4)及第二防塵件（5)組裝於該螺帽（2)之兩端，而 在螺帽（2)兩端構成一防塵裝置。 然，上述習用技術經實際使用後，因為該第一防塵 件（4)與第二防塵件（5)為堆疊設置，且必須再套設 於該組套件（3)，故組裝於螺帽⑴後該防塵裝置之 長度（L1)會較長，相對使得螺帽（2)的整體長度變長 ，故也會影響螺帽（2)於螺桿（1)上運行的有效行程 ，而如果要解決此問題，又必須再增加螺桿〇 )的長度 來彌補，而使得滾珠螺桿的製造成本增加相對售價也會 fe：向’故此種習知技術仍有改良精進之必要。 【新型内容】 03] 基於上述習知技術之問題點，本創作人經過研究改 良後，終有確能達成以下創作之目的之新型誕生。 即，本創作首要目的在於，研發一種能縮短習知 表單編號AOlfll 第4頁/共20頁 防塵裝置之結構設計。 為達上述之目的，本創作係為一種具套疊式防塵裝 置之滾珠螺桿，係包含： 一螺桿，等設有螺旋狀之滚動溝； 一螺帽，其設有一供該螺桿穿設之穿孔，該穿孔内 緣設有相對該滾動溝之滚動槽，該滚動溝及滚動槽之間 係設置複數個滾動體，且該螺帽另設有至少一安裝槽； 至少一防塵裝置，係包含：一第一防塵件、一第二 防塵件及一彈套件； 該第一防塵件，其設有一固定端，藉由該固定端與 該安裝槽配合，使該防塵件固定於該安裝槽，該第一防 塵件係設有一第一通孔，該第一通孔係設有一第一唇部 及一容置部，該第一唇部係朝該滚動溝凸伸設置，該第 一唇部係容設於該滾動溝中，該第一防塵件另設有一凹 Λ 槽及複數個切槽，各該切槽係環形陣列設置於該第一防 塵件的端部，使該第一防塵件的端部形成複數個凸塊， 該凹槽係鄰設於該切槽； 該第二防塵件，其設於該容置部，該第二防塵件係 設有一第二通孔，該第二通孔係設有朝該滚動溝凸伸設 置的第二唇部，該第二唇部係容設於該滚動溝中； 該彈套件，係為一具有彈性之環狀體，該彈套件係 套設於該凹槽。 為了更進一步瞭解本創作之特徵及技術内容，請參 閱以下有關本創作之實施方式說明及圖式，然而此實施 方式及圖式僅供說明及參考用，而非用以對本創作做任 何限制者。 表單編號Α0101 第5頁/共20頁 [0004]11424414 【實施方式】 以下兹配合圖式列舉—較佳實施例，用以對本創作 之組成構件及功效作進-步說明，其巾各圖式之簡要說 明如下： ° 圖四係為本_具套疊式防塵裝置之滾珠螺桿分解 圖。 圖五係為本創作具套疊切塵裝置之滾珠螺桿組合 圖。 。 圖六係為本創作具套疊式防塵裝置之滾珠螺桿剖視 圖。 請參閱圖四至圖六所示，係為本創作一較佳實施例 ，本實施例係為一種具套疊式防塵裝置之滾珠螺桿，係 包含： 一螺桿（1)，其設有螺旋狀之滾動溝（U); 一螺帽（2)，其設有一供該螺桿（1)穿設之穿孔 (21 )，該穿孔（21 )内緣設有相對該滾動溝（u )之 滾動槽（211 )，該滾動溝（n )及滾動槽（211 )之間 係設置複數個滾動體（未顯示），且該穿孔（21)之兩 端係分別設有一安裝槽（22)，本實施例的安裝樽總數 為兩個’但亦可能只有設置一安裝槽（22); 兩防塵裝置，係包含：一第一防塵件（3)、一第二 防塵件（4)及一彈套件（5)，本實施例係例舉兩防塵 裝置的實施例，其亦可只裝設一防塵裝置； 兩該第一防塵件（3)，其設有一固定端（33)，藉 由該固定端（33)與該安裝槽（22)配合，使該防塵件 (3)固定於該安裝槽（22)，通常該固定端（33)與該 表單编號A0101 第6頁/共20頁 安裝槽（22)之固定方式，會再藉备螺絲（未顯示）由 螺帽（2)徑方向鎖固進入該安裝槽（22)，而後牴觸於 該固定端（33);該第一防塵件（3)係設有一第一通孔 (31) ’該第一通孔（31)係設一第一唇部（311)及一 容置部（312)，該第一唇部（311)係朝該滾動溝（11 )凸伸設置，該第一唇部（311)係容設於該滾動溝（η )中，該容置部（312)可為與該第一通孔（31)平齊設 置的環狀平面或一凹陷於該第一通孔（31)的：型凹槽 ，本實施例係為一 L型凹槽；該第一防塵件（3)另設有 一凹槽（32)及複數個切槽（34),各該切槽（34)係 環狀間隔陣列設置於該第一防塵件（3)的端部，使該第 一防塵件（3)的端部形成複數個凸塊（35)，該凹槽（ 32)係鄰設於該切槽（34); 兩該第二防塵件⑷，其分別設於兩該容置部（ 312) ’本實施例之第二防塵件⑷係為單一元件再組 設於該容置部（312)，亦可以雙料㈣方式將該第二防 塵件⑷成型於該容置部（312)，且該第—防塵件（3 )與第二防塵件⑷的材f不同，例如該第—防塵件（ 3)為塑膠材質，得以防止異物進入螺帽（2)，該第二 防塵件⑷材質為羊毛鼓，以吸收汙垢以保持滾動溝（ 11)的清潔，故本創作以不同材f來達到不同的防塵效 果，以符合各種環境的需求；該第二防塵件（4)係幻 一第二通孔（41)，該第二通孔（41)係設有朝該滚動 溝（11)凸伸設置的第二唇部（411)，該第二唇部（ 4U)係容設於該滾動溝⑴）中，為了讓該第一防心 ⑴與第二防塵件⑷的防塵魏不同，本創作係將 表單编號删1 第7頁/共20頁 11424414 該第-I部（311)與滾動溝⑴）之間隙（D)設計成 大於該第二唇部（411)與滾動溝（11)之間隙（d), 且該第-通孔（31)之表面與螺桿⑴之外徑表面的間 隙（τ)係大於該第二通孔（41)之表面與螺桿（1)之 外徑表面的間隙（t)，故該第一防塵件（3)主要是防 止大的異物進入螺帽（2)，而第二防塵件係防止 微小粉塵進入螺帽（2)内部；另外，如圖六的放大圖所 示’該第-唇部cm)與第二唇部⑷n之一端係相 互銜接而有斷差（此部分未顯示），該第一通孔（31) 與第二通孔（41)之一端係相互銜接而有斷差，這 樣設计是可實施的，但是異物粉塵較容易堆積在斷差（e )，而如果要解決異物粉塵堆積的問題，就必須設計如 圖七的放大圖所示，該第一唇部（311)與第二唇部（ 411)之一端係相互銜接而無斷差（此部分未顯示），該 第一通孔（31)與第二通孔（41)之一端係相互銜接而 無斷差，如此就能防止異物粉塵堆積的問題產生。 兩忒彈套件（5)，係為一具有彈性之環狀體，該彈 套件（5)係套設於該凹槽（32)，藉由該彈套件（5) 施以該凸塊（35)束緊力’使該凸塊（35)之第一唇部 (311 )與螺桿（1)表面的間隙縮小，當有遇到異物時 ，该異物會因為該第一唇部（311)的阻擋而順著該切槽 (34)排出該螺桿（1)表面而達到防塵效果。 為求清楚說明本創作之實施特點，以下說明本創作 較習用進步之處及實用方式： 本創作係以套疊方式將第二防塵件（4)套設於第一 防塵件（3)，而該第一防塵件（3)之長度可維持原始 第8頁/共20頁 表單編號A0101 長度或稍微加長，而該第一防塵件（3)加長後之長度仍 較習知技術的防塵裝置之長度短，由圖三及圖六相較之 下可清楚得知，習知技術的防塵裝置之長度（L1)與本 創作的防塵裝置之長度（L2)相比較下，本創作已使防 塵裝置的長度縮短不少，故相對已改善習知技術的問題 〇 綜所上述，所以本創作之『具有產業之可利用性』 應已毋庸置疑，除此之外，在本案實施例所揭露出的特 徵技術，於申請之前並未曾見於諸刊物，亦未曾被公開 使用，不但具有如上所述功效增進之事實，更具有不可 輕忽的附加功效，是故，本創作的『新穎性』以及『進 步性』都已符合專利法規，爰依法提出創作專利之申請 ，祈請惠予審查並早曰賜准專利，實感德便。 以上所述實施例之揭示係用以說明本創作，並非用 以限制本創作，故舉凡數值之變化與等效元件之置換， 仍應隸屬本創作之範疇。 【圖式簡單說明】 [0005] 圖一係為習知技術堆疊式防塵裝置之滾珠螺桿分解 圖。 圖二係為習知技術堆疊式防塵裝置之滾珠螺桿組合 圖。 圖三係為習知技術堆疊式防塵裝置之滚珠螺桿剖視 圖。 圖四係為本創作具套疊式防塵裝置之滚珠螺桿分解 圖。 圖五係為本創作具套疊式防塵裝置之滾珠螺桿組合 表單編號A0101 第9頁/共20頁 M424414 圖。 圖/、係為本創作具套疊式防塵裝置之滾珠螺桿气視 圖，第一防塵件與第二防塵件銜接有斷差。 圖七係為本創作具套疊式防塵裝置之滾珠螺捍却 圖，第一防塵件與第二防塵件銜接無斷差。 。視 【主要元件符號說明】 [0006] 習知技術 (1) 螺桿 (11 )滾動溝 (2) 螺帽 (21 )穿孔 (211 )滾動溝 (22)安裝槽 (3) 組套件 (31) 固定端 (32) 穿孔 (321 )容置部 / (4) 第一防塵件 (41)第一通孔 (411)第一唇部 (5) 第二防塵件 (51) 第二通孔 ' (511)第二唇部 (52) 凹槽 (53) 切槽 (54) 凸塊 表單编號A0101 第1.0頁/共20頁 M424414 (6)彈套件 (LI )長度 本創作 (1)螺桿 (11 )滾動溝 (2 )螺帽 (21 )穿孔 (211)滾動溝 (22)安裝槽 • (3)第一防塵件 (31 )第一通孔 (311) 第一唇部 (312) 容置部 (32) 凹槽 (33) 固定端 (34) 切槽 (35) 凸塊 • (4)第二防塵件 (41 )第二通孔 (411)第二唇部 (5)彈套件 (L2)長度 (d) 、（ D) 、（ t ) 、（ T)間隙 (E)斷差 表單編號A0101 第11頁/共20頁V. [0001] [0002] New description: [New technical field] This creation is a kind of ball screw fitting, especially a ball screw with a telescopic dustproof device. [Prior Art] Please refer to Figure 1 to Figure 3, which is a ball screw with stacked dust-proof devices commonly used in the industry. It consists of a screw (1) with a spiral rolling groove (11). a nut (2) provided with a through hole (21) through which the screw (1) is inserted, the inner edge of the through hole (21) is provided with a rolling groove (211) opposite to the rolling groove (11), the rolling A plurality of rolling elements (not shown) are disposed between the groove (11) and the rolling groove (211), and a mounting groove (22) is respectively disposed at both ends of the threading (21); two sets of kits (3)' The fixed end (31) is disposed on the mounting slot (2 2 ), and the fixed end (31 ) is locked by a nut (2 ) in a radial direction by a screw. The set of kits (3) is fixed to the nut (2). The set of kits (3) is further provided with a perforation (32). The perforation (32) is provided for the insertion of the screw (1). (32) A receiving portion (321) is further provided; the two first dustproof members (4) are respectively disposed on the receiving portion (321). The first dustproof member (4) is provided with a first through hole. (41), the first pass The hole (41) is provided with a first lip portion (411) protruding toward the rolling groove (Η), the first lip portion (411) is received in the rolling groove (11); two second The dust-proof members (5) are respectively disposed on the accommodating portion (321), and the second dust-proof member (5) is stacked on the first dust-proof member (4) (as shown in FIG. 3), the second The dustproof member (5) is provided with a second through hole (51), and the second through hole (51) is provided with a form number Α0101, page 3/20 pages, M424414, which is arranged toward the rolling groove (li) a second lip (5 (1) is received in the rolling groove (1)), the second dustproof member (1) is further provided with a groove (52) and a plurality of slots (53), each of which The grooving (53) is disposed at an end of the second dustproof member (5), so that the end portion of the second dustproof member (5) forms a plurality of bumps ((4) 'the groove (52) is adjacent to the groove The slot (53); the two-elastic kit (4) is a hetero-annular body, and the elastic kit (6) is sleeved in the recess (52) 'by the elastic kit (6) The bump ((4) tightens the force to make the second lip of the bump (54) 511) The gap with the surface of the screw (1) is reduced. When a foreign object is encountered, the foreign matter is discharged from the surface of the screw (1) along the slit (53) due to the blocking of the second humiliating portion (511). The effect is that the set of the kit (3), the first dustproof member (4) and the second dustproof member (5) are assembled at both ends of the nut (2), and a nut is formed at both ends of the nut (2). Dust-proof device. However, after the above-mentioned conventional technology is actually used, since the first dust-proof member (4) and the second dust-proof member (5) are stacked and must be set in the set (3), assembled in After the nut (1), the length (L1) of the dustproof device is long, and the overall length of the nut (2) is relatively long, so that the effective stroke of the nut (2) on the screw (1) is also affected, and If this problem is to be solved, the length of the screw 〇) must be increased to make up for it, and the manufacturing cost of the ball screw is increased relative to the selling price. Therefore, it is necessary to improve the precision of the conventional technology. [New content] 03] Based on the above-mentioned problems of the prior art, the creator has finally achieved the following new creation goals after research and improvement. That is, the primary purpose of this creation is to develop a structural design that can shorten the conventional form number AOlfll Page 4/20. In order to achieve the above purpose, the present invention is a ball screw having a nested dustproof device, comprising: a screw, etc. having a spiral rolling groove; a nut having a screw for the screw to be worn a perforation, the inner edge of the perforation is provided with a rolling groove opposite to the rolling groove, a plurality of rolling bodies are disposed between the rolling groove and the rolling groove, and the nut is further provided with at least one mounting groove; at least one dustproof device And comprising: a first dustproof member, a second dustproof member and a spring kit; the first dustproof member is provided with a fixed end, and the fixed end cooperates with the mounting slot to fix the dustproof member The first dust-proof member is provided with a first through hole, and the first through hole is provided with a first lip portion and a receiving portion, and the first lip portion is protruded toward the rolling groove. The first lip portion is disposed in the rolling groove, and the first dustproof member is further provided with a concave groove and a plurality of slits, and each of the grooved annular arrays is disposed at an end of the first dustproof member, so that The end of the first dustproof member forms a plurality of bumps, and the groove is adjacent to the slit; a second dustproof member is disposed on the accommodating portion, wherein the second dustproof member is provided with a second through hole, and the second through hole is provided with a second lip protruding toward the rolling groove, the first The two lip portions are accommodated in the rolling groove; the elastic kit is an elastic annular body, and the elastic sleeve is sleeved in the groove. In order to further understand the features and technical contents of this creation, please refer to the following description of the implementation of the creation and the drawings. However, the embodiments and drawings are for illustrative purposes only and are not intended to limit the creation. . Form No. 1010101 Page 5 of 20 [0004] 11424414 [Embodiment] The following is a list of preferred embodiments for making a step-by-step description of the components and functions of the present creation. The brief description is as follows: ° Figure 4 is an exploded view of the ball screw of the hooded dust-proof device. Figure 5 is a combination of ball screws for creating a nested dust-cleaning device. . Figure 6 is a cross-sectional view of a ball screw for creating a nested dustproof device. Please refer to FIG. 4 to FIG. 6 , which is a preferred embodiment of the present invention. The embodiment is a ball screw with a telescopic dustproof device, comprising: a screw (1), which is provided with a spiral shape. a rolling groove (U); a nut (2) provided with a through hole (21) through which the screw (1) is pierced, the inner edge of the hole (21) being provided with a rolling groove opposite to the rolling groove (u) 211), a plurality of rolling bodies (not shown) are disposed between the rolling groove (n) and the rolling groove (211), and a mounting groove (22) is respectively disposed at both ends of the through hole (21). The total number of installations is two', but it is also possible to install only one mounting slot (22); the two dustproof devices include: a first dustproof member (3), a second dustproof member (4) and a bullet kit (5) In this embodiment, an embodiment of the two dustproof devices is exemplified, and only one dustproof device may be installed; and the first dustproof member (3) is provided with a fixed end (33) by the fixed end ( 33) cooperate with the mounting groove (22) to fix the dustproof member (3) to the mounting groove (22), usually the fixed end (33) and the form number A0101 sixth / A total of 20 pages of mounting groove (22) fixed way, will be borrowed screws (not shown) locked by the nut (2) in the radial direction into the mounting slot (22), and then touched the fixed end (33) The first dustproof member (3) is provided with a first through hole (31). The first through hole (31) is provided with a first lip portion (311) and a receiving portion (312). The lip portion (311) is disposed to protrude from the rolling groove (11), the first lip portion (311) is received in the rolling groove (η), and the receiving portion (312) can be the first portion The through hole (31) is flush with the annular plane or a groove recessed in the first through hole (31), and the embodiment is an L-shaped groove; the first dustproof member (3) is another a groove (32) and a plurality of slots (34) are provided, and each of the slots (34) is disposed at an end of the first dustproof member (3) in an annular array, so that the first dustproof member (3) The end portion is formed with a plurality of bumps (35), the recesses (32) are disposed adjacent to the slits (34); and the second dustproof members (4) are respectively disposed at the two receiving portions (312) The second dustproof member (4) of the present embodiment is a single component and is further assembled in the housing. (312), the second dustproof member (4) may be formed in the accommodating portion (312) by a double material (4), and the first dust-proof member (3) is different from the material f of the second dust-proof member (4), for example, the first- The dustproof member (3) is made of a plastic material to prevent foreign matter from entering the nut (2). The second dustproof member (4) is made of a wool drum to absorb dirt to keep the rolling groove (11) clean, so the creation is made of different materials. To achieve different dustproof effects to meet the needs of various environments; the second dustproof member (4) is a second through hole (41), and the second through hole (41) is provided with the rolling groove ( 11) a second lip portion (411) protrudingly disposed, the second lip portion (4U) being received in the rolling groove (1)), in order to prevent the first anti-heart (1) and the second dust-proof member (4) from dustproof Different, this creation department deletes the form number 1 page 7 / total 20 pages 11424414 The gap (D) between the first-I part (311) and the rolling groove (1) is designed to be larger than the second lip (411) and rolling a gap (d) of the groove (11), and a gap (τ) between a surface of the first through hole (31) and an outer diameter surface of the screw (1) is larger than a surface and a snail of the second through hole (41) The gap (t) of the outer diameter surface of the rod (1), so that the first dustproof member (3) mainly prevents large foreign matter from entering the nut (2), and the second dustproof member prevents fine dust from entering the nut (2) In addition, as shown in the enlarged view of FIG. 6, 'the first lip portion cm' and one end of the second lip portion (4) n are connected to each other with a gap (this portion is not shown), and the first through hole (31) ) and one end of the second through hole (41) is connected to each other with a gap, so that the design is achievable, but the foreign matter dust is more likely to accumulate in the gap (e), and if the problem of foreign matter dust accumulation is to be solved, It is necessary to design an enlarged view as shown in Fig. 7. One end of the first lip portion (311) and the second lip portion (411) are connected to each other without a gap (this portion is not shown), and the first through hole ( 31) One end of the second through hole (41) is connected to each other without a gap, so that the problem of accumulation of foreign matter dust can be prevented. The two-bolt kit (5) is an elastic annular body, and the elastic kit (5) is sleeved on the groove (32), and the protrusion is applied by the elastic kit (5) (35) The tightening force reduces the gap between the first lip portion (311) of the bump (35) and the surface of the screw (1), and when foreign matter is encountered, the foreign matter may be due to the first lip portion (311) Blocking and discharging the surface of the screw (1) along the slit (34) to achieve a dustproof effect. In order to clearly explain the implementation characteristics of this creation, the following describes the progress and practical methods of this creation: The creation of the second dustproof member (4) is sleeved on the first dustproof member (3). The length of the first dustproof member (3) can be maintained as long as the original 8th page/total 20 page form number A0101 is lengthened, and the length of the first dustproof member (3) is longer than that of the conventional dustproof device. The length is short, as can be clearly seen from Fig. 3 and Fig. 6, the length of the dustproof device of the prior art (L1) is compared with the length of the dustproof device (L2) of the present invention, and the creation has made the dustproof device The length has been shortened a lot, so it has been improved compared with the problem of the conventional technology. Therefore, the "industrial availability" of this creation should be unquestionable, except for the case disclosed in the present embodiment. The feature technology has not been seen in publications before the application, nor has it been used publicly. It not only has the fact that the above-mentioned effects are enhanced, but also has additional functions that cannot be neglected. Therefore, the novelty and progress of this creation Sexuality has been in compliance with patent laws and regulations, and the application for the creation of patents has been filed in accordance with the law, and it is prayed for review and early granting of patents. The above description of the embodiments is used to illustrate the present invention and is not intended to limit the present invention. Therefore, the change of numerical values and the replacement of equivalent elements should still belong to the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS [0005] FIG. 1 is an exploded view of a ball screw of a conventional dustproof device of the prior art. Figure 2 is a combination of ball screws for a conventional dust-collecting device. Figure 3 is a cross-sectional view of a ball screw of a conventional dustproof device of the prior art. Figure 4 is an exploded view of the ball screw for the creation of a nested dustproof device. Figure 5 is a ball screw combination for creating a nested dustproof device. Form No. A0101 Page 9 of 20 M424414 Diagram. Fig. / is a gas view of a ball screw for creating a nested dustproof device, and the first dustproof member and the second dustproof member are connected with a gap. Figure 7 is a diagram of the ball screw of the nested dustproof device. The first dustproof member and the second dustproof member are connected without any break. . [Main component symbol description] [0006] Conventional technology (1) Screw (11) Rolling groove (2) Nut (21) perforation (211) Rolling groove (22) Mounting groove (3) Group kit (31) Fixed End (32) Perforation (321) accommodating portion / (4) First dustproof member (41) First through hole (411) First lip portion (5) Second dustproof member (51) Second through hole ' (511 )Second lip (52) Groove (53) Grooving (54) Bump form number A0101 Page 1.0 / Total 20 pages M424414 (6) Bolt kit (LI) Length This creation (1) Screw (11) Rolling groove (2) nut (21) perforation (211) rolling groove (22) mounting groove • (3) first dustproof member (31) first through hole (311) first lip portion (312) receiving portion ( 32) Groove (33) Fixed end (34) Grooved (35) Bump • (4) Second dustproof member (41) Second through hole (411) Second lip (5) Elastic kit (L2) length (d) , ( D ) , ( t ) , ( T ) Clearance (E) Break Form No. A0101 Page 11 of 20