1303222 九、發明說明： 【發明所屬之技術領域】 本發明是關於-種筆具，特別是指一種筆怒之書寫端 可以經由削切恢復尖銳狀態之具有削筆芯功能的筆具。 【先前技術】1303222 IX. Description of the Invention: [Technical Field] The present invention relates to a writing instrument, and more particularly to a writing instrument having a pen-refilling function in which a writing end of a pen anger can be restored to a sharp state by cutting. [Prior Art]
參閱圖1、2’在已知的技藝中，具有削筆芯功能之筆 具1係可供—筆芯12安裝，所述筆芯12具有—個位在下 方的書寫端12卜而該筆具i通常包含：一直立中空之筆桿 個套#在筆才旱11上方的筆1 13、一可拔離地套設在 筆夾13上的刀座14、一刀片15，以及一個蓋在刀座14上 方的頂蓋10 〇 忒筆夾13具有一個基壁ι31，以及一個自基壁Hi往 上突出的穿套環壁132。而該刀座14具有一個中間具有一 通孔141的區隔壁142、一環自該區隔壁142往筆夾η方 向延伸的夾合環壁143，以及—個自區隔壁142往相反方向 延伸的刀片安裝壁144，在刀片安裝壁144及區隔壁Μ〕間 |疋出削槽145。而該刀片15是固定地安裝在削槽工45 内，具有一個朝向該通孔141的削切口 151，此削切口 151 八有個直立部152，以及一由下往上逐漸和直立部152接 連的斜削部153。 參閱圖1、3，習知筆具丨在正常使用狀態下，該刀座 14疋套設在筆夾13之穿套環壁132上，此時突出於筆桿u 底部之筆芯12可以供書寫。當筆芯12的書寫端121逐漸 磨耗而呈圓鈍狀時，將刀座14自筆夾13上拔下，再反向 5 1303222 套設在筆桿U的底部，此時筆芯12的書寫端121就可以由 通孔141插入削槽145 0，藉由轉動該刀座μ，就可以利 用刀片15的斜削部153對筆芯12的書寫端121進行切削 的動作。 奸習知筆具1雖然利用刀座14及刀片15可以執行削筆 心12的功能，但是在設計上，由於刀座14是藉由夾合環 :1:3:筆夹13的穿套環壁132套合在—起，因此，當兩 :間=深度不足時’該刀座14即容易自筆夾η上脫 f套_度的考量„可使心14和筆夾η穩固 述二IS當刀座14在執行切削筆芯12的動作時，前 人3必需往筆桿11底部穿套，當筆桿Η底部的 := 3所圈圍的内徑時，筆芯12就_Referring to Figures 1 and 2', in the known art, a writing instrument 1 having a refilling function is provided for the refill 12 to be mounted, the refill 12 having a lower writing end 12 and the pen The i usually includes: a pen set that is always hollow, a pen 1 above the pen dry 11 , a seat 14 that can be pulled out of the pen holder 13 , a blade 15 , and a cover The top cover 10 above the seat 14 has a base wall ι 31 and a collar wall 132 projecting upward from the base wall Hi. The blade holder 14 has a partition wall 142 having a through hole 141 in the middle, a ring wall 143 extending from the partition wall 142 to the pen holder n direction, and a blade mounting extending from the partition wall 142 in the opposite direction. The wall 144, between the blade mounting wall 144 and the partition wall 疋, cuts out the grooving 145. The blade 15 is fixedly mounted in the cutter 45 and has a cutting slit 151 facing the through hole 141. The cutting slit 151 has an upright portion 152, and is gradually connected from the bottom to the upper portion 152. The beveled portion 153. Referring to Figures 1 and 3, in the normal use state, the holder 14 is sleeved on the collar wall 132 of the clip 13, and the refill 12 protruding from the bottom of the barrel u can be used for writing. . When the writing end 121 of the refill 12 is gradually worn and is rounded, the blade holder 14 is unplugged from the pen holder 13, and the reverse 51303222 is placed on the bottom of the pen holder U. At this time, the writing end 121 of the refill 12 The cutting groove 145 0 can be inserted into the through hole 141, and by rotating the holder μ, the writing end 121 of the writing lead 12 can be cut by the beveling portion 153 of the blade 15. Although the skill of the pen 12 can be performed by the blade holder 14 and the blade 15, the design of the pen holder 14 is by the clamping ring: 1:3: the piercing ring of the pen holder 13 The wall 132 fits in, so when the two: between = depth is insufficient, the seat 14 is easy to take off from the pen holder η _ degree _ can make the heart 14 and the pen holder η stabilize the two IS when When the knife holder 14 performs the action of cutting the refill 12, the predecessor 3 must wear a sleeve to the bottom of the pen holder 11, and when the bottom of the pen holder is: = 3 the inner diameter of the circle, the refill 12 is _
斥J地插入刀座1 4 > ϊ!ί丨丨4品Λ Λ C 之削槽145，顯然此種設 供桿徑配合的特定筆桿 1 4 此外，…且， 在使用上受到-些限制。 白筆"1在執行削筆芯12的動作時，該刀 =相對於筆芯12作旋轉的動作，因此該w丨 地安插在刀座14上，此種固定式 “ * 口疋 更換刀片15，導致筆且i | 、汉汁，亦無法 【發明内容】 U無法經常保持在較佳削切狀態。 本m的係在提供—種適用範31冑，f 換刀=保，芯效果之具有削筆芯功能的=便更 芯呈有1堂^供—筆芯容襄並削切該筆芯，所述筆 h有書寫翊，而該筆具包含：草 安裳在筆桿上的刀座料、-個可拔離地 片，以及一個將刀片以可 1303222 更換方式安裝在刀座上的端蓋。其中該刀座 鲞浐太入 7从a栝·一個與 才于套β之安插部，以及一個削芯部，該削芯部具有—個 :定出-削槽的刀片安裝壁，在該刀片安裝壁上具有至少 :個通向削槽的嵌入式導槽，而該削槽具有一個遠離安插 2之插入端，該刀片是安裝在刀座之嵌入式導槽内’包括 -個往刀座之削槽伸入的刃冑’上述刀部係由鄰近削槽之 :入端逐漸地往安插部並往中央斜伸，該端蓋包括固Inserting the knife holder 1 4 > ϊ! 丨丨 丨丨 4 Λ Λ C grooving groove 145, obviously this specific rod for the rod diameter fits 1 4 In addition, ... and, in use, subject to some restrictions . When the white pen "1 performs the action of the refining core 12, the knife = rotates relative to the refill 12, so that the wrap is inserted into the holder 14, such a fixed type "* mouth replacement blade 15, causing the pen and i |, Han juice, can not [invented content] U can not always maintain a better cutting state. This m is in the provision of a suitable range of 31 胄, f tool change = guarantee, core effect The pen has a function of refining the core, and the core is provided with a pen for refilling and cutting the refill, the pen has a writing cymbal, and the pen includes: a knife on the pen The seat material, a pull-off piece, and an end cover for mounting the blade on the seat in a 1303222 replacement manner, wherein the seat is too inserted into the 7 from the a And a core-cutting portion having: a fixed-grooved blade mounting wall having at least one embedded guide groove leading to the cutting groove, and the cutting groove Having a insertion end away from the insertion 2, the blade is mounted in the embedded guide groove of the holder, including a blade extending into the slot of the holder 'The cutter adjacent the cut groove by the portion of the line: into the end portion and gradually toward the center to Xieshen placement, the cap comprising a solid
定刀片的套合壁’以及一個設有對應削槽之一插口的端壁 藉在刀座上直接設置可供筆芯進入並切削的削槽，以 及利用可拔離之端蓋來安裝刀片的設計，不僅可以讓筆具 在執行切削功能時不受筆桿之桿徑限制，而具有較廣的適 用性外，亦可因此達到方便更換刀片的功效。 【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 以下配合參考圖式之較佳實施例的詳細說明巾，將可清楚 的呈現。 / ★參閱圖4、5、6,本發明筆具之一較佳實施例係可供一 筆^安裝’並可對所述筆芯2之-書寫端21進行削切， X筆八包3 ·—筆桿3、一個可拔離地安裝在筆桿3上方 的刀座4、兩片刀片5、一防塵套6,以及—端蓋了。 本實施例之筆桿3包括：-支中空長桿狀的外管3 1 -個可旋鬆地螺裝在外管31底部的筆頭32、_根可沿著 度方向移動並具彈性復位力的内t 33、—個安裝在外管, 7 1303222 之一外通道311内部並位於内管33下方的控制組件34，以 及一個插套在内管33上方的橡皮擦35。 該外官31具有一個界定出該外通道311的外管壁 ，而該内管33具有一個界定出一内通道331的内管壁332 ，上述内管壁332的上方突出於外通道扣，具有一個徑突 壞333，此徑突環333具有一環位在外管壁312上方且外徑 相當的外抵靠面334,以及一環朝向内通道331並供橡皮擦 35靠抵的内抵靠面335。 > 本實施例的刀座4包括：一可拔離地套裝在筆桿3上 方的安插部41、一個自該安插部則主上突出的削芯部42 ，以及-個自安插部41往外並往下延伸的筆夾部43。該安 插部41具有一個水平的基壁川，以及一個自該基壁4ΐι 之徑向外周緣往下延伸的套合環壁412，在套合環壁412及 基壁411間界定出一個開口朝下的套裝室413，其中該套合 環壁412具有-段與内管壁332貼合的第一環面414、一個 丨 #抵在外抵靠面334上的抵靠環面415，以及一個自抵靠環 面415外周緣往下延伸並和外管壁312貼合的第二環面々μ 〇 而該削芯部42係由基壁411往上一體突出，具有一個 環形並界定出-削槽421的刀片安裝壁似，上述刀片安裝 壁42曾2具有兩個斜向設置的嵌入式導槽423.，以及-個和嵌 入式導槽423交集並與削槽421垂直連通的橫向穿孔似， 在削槽421 _L具有—個位在上方的插入端425。 本實施例的刀片5是可更換地安裝刀座4之嵌入式導 8 1303222 槽423内，包括一個朝向削槽421的刃部51，安裝後該刃 部5 1是由插入端425逐漸地往中並安插部41方向斜伸。 本實施例之防塵套6是擺放在刀座4的削芯部42上方 ，係由例如橡膠等可變形材料製成，包括一環外徑與削芯 部42相當的夾設環壁61，以及一個厚度縮小並位在夾設環 壁61間的變形壁62’此變形壁Q具有數條由中央往徑向 外端延伸的剖溝621，以及數個位在相鄰剖溝621間的封閉 夾片622。本實施例的端蓋7是不掉^地套設在刀座4之削 芯部42上，並且固定該防塵套6及刀片5，上述端蓋7包 括··-環與削芯部42之刀片安裝壁422的外環面貼合的套 口 土 71以及彳m連接在套合壁7丨頂緣間的端壁72，所 述端壁72具有一個對應該插入端425的插口 721，前述插 口 721並具有—個遠離該削槽621且直徑擴大的筆芯導引 端 722。 ^貫施例之筆具在正常使用狀態下，該筆芯2是安裝 在内管33的内通道331內，甘告命， 内，、書寫编21則是自筆頭32突 出以供書寫。 參閱圖5、7、8，去*炊 , 田本發明之筆具要進行切削筆芯2的 才呆作時，乃將刀座4拔離 799 ^ ^ 葦# 3，然後使端蓋7的筆芯導引 立而722對應該筆芯2的蚩耷 哼筆―_山 曰寫鳊21，當筆芯2的書寫端21由 成聿心導引端722插向 μ . 套6之變形壁62時，可以將各 片封閉夾片622往徑向外端 削槽切，由於設在刀座4内^開，並逐漸地進入刀座4的 722 —側往基壁41方向是由鄰近㈣導引端 、所向中央傾斜，因此，當筆芯2 9 1303222 插入於該削槽421後，將受到刀片5之刃部51的限制，藉 由旋轉該刀座4或筆桿3，即可進行削切筆芯2之書寫端 1的操作 Μ筆芯2削切完成並拔離刀座4時，前述封閉 夾片622會往中央靠合，以避免削切的粉屑由削槽421掉 出。The sleeve wall of the fixed blade and an end wall having a socket corresponding to one of the slots are provided with a slot for the pen core to enter and cut directly on the knife seat, and a blade for mounting the blade by the extractable end cap The design not only allows the pen to be subjected to the cutting function but is not limited by the rod diameter of the pen holder, but has wider applicability, and thus can achieve the effect of convenient blade replacement. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments. / Referring to Figures 4, 5, and 6, a preferred embodiment of the writing instrument of the present invention is provided for mounting and cutting the writing end 21 of the refill 2, and the X pen is eight packs. - a pen holder 3, a blade holder 4 which is detachably mounted above the pen holder 3, two blades 5, a dust jacket 6, and an end cap. The pen holder 3 of the present embodiment comprises: a hollow tube-shaped outer tube 31 - a pen head 32 that can be loosely screwed on the bottom of the outer tube 31, and the root can be moved in the direction of the degree and has an elastic restoring force. t 33, a control assembly 34 mounted inside the outer tube, 7 1303222 inside the outer channel 311 and below the inner tube 33, and an eraser 35 inserted over the inner tube 33. The outer member 31 has an outer tube wall defining the outer passage 311, and the inner tube 33 has an inner tube wall 332 defining an inner passage 331, the upper portion of the inner tube wall 332 protruding above the outer passage buckle, A radial breach 333 has an outer abutment surface 334 that is annularly above the outer tubular wall 312 and has an outer diameter, and an inner abutment surface 335 that faces the inner passage 331 and is biased against the eraser 35. > The tool holder 4 of the present embodiment includes: an insertion portion 41 that is detachably fitted over the pen holder 3, a core cutting portion 42 that protrudes from the insertion portion, and a self-insertion portion 41 that goes outward and A pen holder portion 43 that extends downward. The insertion portion 41 has a horizontal base wall and a collar wall 412 extending downward from a radially outer periphery of the base wall 4, and an opening is defined between the collar wall 412 and the base wall 411. a lower chamber 413, wherein the collar wall 412 has a first annulus 414 that is in contact with the inner tube wall 332, an abutment surface 415 that abuts against the outer abutment surface 334, and a self The second annular surface 往μ 往 extending downwardly from the outer periphery of the toroid 415 and engaging the outer tube wall 312, and the core-cut portion 42 is integrally protruded upward from the base wall 411, has a ring shape and defines a-grooving The blade mounting wall of the 421 is similar to that, the blade mounting wall 42 has two embedded guide grooves 423. which are disposed obliquely, and a transverse perforation which intersects with the embedded guide groove 423 and is perpendicularly connected to the cutting groove 421. The slot 421_L has an insertion end 425 located above. The blade 5 of the present embodiment is an insert guide 8 1303222 slot 423 that is replaceably mounted to the blade holder 4, and includes a blade portion 51 facing the slot 421. The blade portion 51 is gradually inserted from the insertion end 425 after installation. The middle insertion portion 41 is obliquely extended. The boot 6 of the present embodiment is placed above the core portion 42 of the holder 4 and is made of a deformable material such as rubber, and includes a ring wall 61 having a ring outer diameter corresponding to the core portion 42 and a deformed wall 62' having a reduced thickness and positioned between the interposed ring walls 61. The deformed wall Q has a plurality of slits 621 extending from the center toward the radially outer end, and a plurality of closed spaces between adjacent slits 621 Clip 622. The end cover 7 of the present embodiment is sleeved on the core portion 42 of the blade holder 4, and the dust jacket 6 and the blade 5 are fixed. The end cover 7 includes a ring and a core portion 42. The outer ring surface of the blade mounting wall 422 is fitted with a sleeve soil 71 and the end wall 72 of the top edge of the sleeve wall 7 is connected to the top end 72. The end wall 72 has a socket 721 corresponding to the insertion end 425. The socket 721 has a refill lead end 722 that is enlarged from the slot 621 and has an enlarged diameter. In the normal use state, the refill 2 is mounted in the inner passage 331 of the inner tube 33, and the inner portion and the writing unit 21 are protruded from the writing head 32 for writing. Referring to Figures 5, 7, and 8, go to *炊, when the pen of the present invention is to be used to cut the refill 2, the knife holder 4 is pulled away from the 799 ^ ^ 苇 # 3, and then the end cap 7 is The refill guides the vertical and the 722 corresponds to the refill 2 of the refill 2, and the writing end 21 of the refill 2 is inserted into the μ-guided end 722 to the μ. At 62 o'clock, each piece of closing clip 622 can be cut into the radially outer end, and is opened in the seat 4, and gradually enters the 722 side of the seat 4 toward the base wall 41 by the proximity (four) The guiding end is inclined toward the center. Therefore, when the refill 2 9 1303222 is inserted into the cutting groove 421, it will be restricted by the blade portion 51 of the blade 5, and by rotating the holder 4 or the sheath 3, the positioning can be performed. The operation of the writing end 1 of the refilling refill 2 is completed. When the refill 2 is cut and pulled out of the holder 4, the closing clip 622 is pressed toward the center to prevent the cut powder from falling out of the cutting groove 421. .
參閱圖9、1〇,值得進一步說明的是，本發明之刀座4 除了可以切削安裝在配合之筆桿3上的筆芯2外，也可以 供其他桿徑不同之筆桿3,使用，即如圖9所示，當筆芯2 :衣在直徑較大之筆桿3,内時，由於本發明在削切筆芯2 時，該筆桿3,完全不需要伸入刀座4或者端蓋7内部，因 此，本發明該項設計也可以供各種桿徑不同之筆具使用。 除此之外’本發明在削切筆芯2之後，可以將端蓋7拔離 刀座4’然後取下該防塵套6,即可倒出位在削槽切内的 粉屬，在此同時，當端I 7被拔離刀座 也可以被抽離刀座4,亦即’♦ 夕"4刀片5 ,,"片5之刃部51因摩耗而 ' / ’因為刀片5係由後入式導槽切嵌入Referring to FIG. 9 and FIG. 1 , it should be further noted that the tool holder 4 of the present invention can be used for cutting the pen holder 2 mounted on the matching pen holder 3, and can also be used for other pen holders 3 having different rod diameters. As shown in FIG. 9, when the refill 2 is coated in the pen holder 3 having a large diameter, since the pen ream 2 is cut by the present invention, the pen holder 3 does not need to protrude into the seat 4 or the end cover 7 at all. Therefore, the design of the present invention can also be used for various pens having different rod diameters. In addition, after the invention, after cutting the refill 2, the end cover 7 can be pulled out of the seat 4' and then the dust cover 6 can be removed, and the powder genus located in the cutting groove can be poured out. At the same time, when the end I 7 is pulled out of the seat, it can also be pulled away from the seat 4, that is, '♦ 夕 " 4 blade 5 , , " blade 5 of the blade 5 due to wear and tear ' / ' because of the blade 5 Cut-in by the rear-entry guide
可以輕易的更換77 Η < a地 H 片5’使♦具經常保持有較佳削筆芯2的 功月6 〇 點：由以上說明可知，本發明該筆具的設計具有下述的優 一、週用性廣··如圖8、Q無—L 時，由於只有筆芯2的書窝：，發明之筆具在使用 在供筆芯2插入的部份;需要伸入削槽切内，且 明之筆具在使用時，不會受到筆;阻礙二設計’因此，本發 聿# 3直徑的限制，在使用 10 1303222 時不會因為供筆芯2組裝之筆桿3的桿徑大小不同而異， 故本發明不僅可削切筆芯2，亦具有適用性廣的優點。 二、方便清理粉屬：本發明之筆具在設計上，只要將 端蓋7拔離刀座4, gp可輕鬆地倒出削槽421中的粉屑。 可更換刀片5，使筆具經常保有較佳切削筆芯2的 功月匕、·本發明在設計上，由於刀# 5是«在軌道式的嵌 一弋V軋423内，因此當刀片5之刃部5丨逐漸鈍化時，可 &易的更換刀片5 ’故本發明亦具有經常保持較佳削切功能 惟以上所述者，僅為本發明之較佳實施例而已，當不 ί以此限定本發明實施之_，即大凡依本發㈣請專利 乾圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖.1是一種習知筆具之組合剖視圖； 圖2是該習知筆具之一局部立體分解圖，· 圖3是該習知筆具之一使用狀態剖視圖； 圖4是本發明筆具之一較佳實施例的組合剖視圖； 圖5疋δ亥較佳實施例之一立體分解圖； β 圖6是該較佳實施例之一局部組合剖視圖 4筆具之一刀座及相配合元件間的組合關係； 、 顯示該筆具即 該筆具已完成 圖7疋该較佳實施例的一局部剖視圖 將削切一筆芯的狀態； 圖8是一類似圖7的局部剖視圖，圖中 J303222 削切筆芯的狀態； 圖9是該較佳實施例之一使用狀態圖；及 圖10是該較佳實施例的一未完整立體分解圖，主要顯 示該筆具之兩刀片及一防塵套自該刀座上拆解的情形。 12 1303222It can be easily replaced with 77 Η < a 地H片 5' so that it can always maintain a good refilling core 2 : points: As can be seen from the above description, the design of the stylus of the present invention has the following advantages According to Fig. 8, when there is no L-L, since there is only the book cover of the refill 2, the pen of the invention is used in the portion where the refill 2 is inserted; And the pen of the Ming will not be subjected to the pen when it is used; hinder the design of the second. Therefore, the limitation of the diameter of the hairpin # 3 does not differ depending on the diameter of the rod 3 of the pen 3 assembled by the refill 2 when using 10 1303222 However, the present invention not only cuts the refill 2 but also has the advantage of wide applicability. Second, it is convenient to clean the powder: The pen of the invention is designed, as long as the end cap 7 is pulled away from the seat 4, the gp can easily pour out the dust in the cutting groove 421. The blade 5 can be replaced, so that the pen often retains the power of the preferred refill 2, and the present invention is designed in that, since the knife #5 is «in the orbital type of V-roll 423, when the blade 5 When the blade portion 5 is gradually passivated, the blade 5 can be easily replaced. Therefore, the present invention also has a function of constantly maintaining a better cutting function, but the above is only a preferred embodiment of the present invention. </ RTI> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a combination of a conventional writing instrument; FIG. 2 is a partial exploded perspective view of the conventional writing instrument, and FIG. 3 is a cross-sectional view showing a state of use of the conventional writing instrument; 4 is a sectional view of a preferred embodiment of the writing instrument of the present invention; FIG. 5 is an exploded perspective view of a preferred embodiment of the present invention; FIG. 6 is a partial sectional view of the preferred embodiment. a combination relationship between the seat and the mating component; displaying the pen, that is, the pen has been completed. FIG. 7 is a partial cross-sectional view of the preferred embodiment to cut a core; FIG. 8 is a view similar to FIG. 1 is a state in which the refill is cut; FIG. 9 is a view showing a state of use of the preferred embodiment; and FIG. 10 is an incomplete exploded view of the preferred embodiment, mainly showing two of the pens. The blade and a boot are disassembled from the seat. 12 1303222
【主要元件符號說明】 2 筆芯 > 416 第二環面 21 書寫端 42 削芯部 3 筆桿 421 削槽 3， 筆桿 422 刀片安裝壁 31 外管 423 嵌入式導槽 311 外通道 424 穿孔 312 外管壁 425插入端 32 筆頭 43 筆夾部 33 内管 5 刀片 331 内通道 51 刃部 332 内管壁 6 防塵套 333 徑突環 61 夾設環壁 334 外抵靠面 62 變形壁 335 内抵靠面 621 剖溝 34 控制組件 622 封閉夾片 35 橡皮擦 7 端蓋 4 刀座 71 套合壁 41 安插部 72 端壁 411 基壁 721 插口 412 套合環壁 722 筆芯導引端 413 套裝室 414 第一環面 415 抵靠環面 13[Main component symbol description] 2 Refills> 416 Second torus 21 Writing end 42 Core-cutting part 3 Pen 421 Cutting groove 3, Pen 422 Blade mounting wall 31 Outer tube 423 Embedded guide groove 311 Outer passage 424 Perforation 312 Tube wall 425 insertion end 32 Pen head 43 Pen holder 33 Inner tube 5 Blade 331 Inner channel 51 Blade 332 Inner tube wall 6 Dust sleeve 333 Diameter ring 61 Interposed ring wall 334 External abutment surface 62 Deformed wall 335 Face 621 Ditch 34 Control assembly 622 Closure clip 35 Eraser 7 End cover 4 Knife holder 71 Fitting wall 41 Plunger 72 End wall 411 Base wall 721 Socket 412 Fitting ring wall 722 Refill lead end 413 Set chamber 414 The first torus 415 abuts the torus 13