1247588 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種安全帽鏡片固定分段調整裝置， 尤指一種可以使鏡片穩固結合在安全帽上，且使鏡片在 分段掀啟時可以確實定位之固定分段調整裝置，同時兼 具結合穩定度優良以及分段調整定位確實之優點及功效 者。 【先前技術】 按，習知安全帽鏡片之固定及調整裝置概如第一圖 所示，主要包含一安全帽帽殼10、一片弧形鏡片20、一 對耳蓋板30及若干螺栓40，其中，該帽殼10兩側適當 位置處係開設有鎖接孔101 ;該弧形鏡片20兩端分別開 設一穿孔201 ;而耳蓋板30之相對内側面則凸設有插設 於該弧形鏡片20穿孔201中之中空凸軸301 ;藉之，令 該對耳蓋板30之凸軸301分別插設於鏡片20兩端之穿 孔201中，再利用螺栓40穿過耳蓋板30之凸軸301後 鎖固在帽殼10之鎖接孔101中定位，使鏡片20以耳蓋 板30之凸軸301為轉軸進行樞轉掀啟或蓋合等動作。 又，為使安全帽之鏡片20在掀啟後或蓋合時可以確實定 位，因此在鏡片20兩端之外侧面以及耳蓋板30之内侧 面（即鏡片20與耳蓋板30之貼合面）通常會分別成型 相互對應之定位凹陷202與定位凸粒302，當鏡片20樞 轉至一固定角度時，耳蓋板30内側面之定位凸粒302便 會嵌掣在鏡片20之定位凹陷202中形成卡掣定位狀態。 惟，經過本發明人針對上述安全帽鏡片之固定及調整裝 置進行深入研究後卻發現以下若干缺失，茲於下文作一 詳述。 請參閱第一圖所示，由於鏡片20係介於安全帽帽殼 10與耳蓋板30之間，因此當鏡片20進行掀啟或蓋合之 1247588 ，作日守，往往會因為鏡2 ^ ^ ^ ^ ^ ^ ^ ^ 達對應之定位凸粒302的緣故，T凹，2二尚未T巧 使鏡片別Λ接 ，之現象’如此—來，便 i生出且装^ JT T斗盍板30產生一股外推力量，不僅會 302磨平而It卡操作下來更會造成定位凸粒 . 、 失去卡隼疋位作用。再者，由於镑Μ ?n 帽ΐ ίο板上3 0二ΐ ΐ利用螺检4 0直接鎖固結合在安全帽 片^減、不僅影響安全帽之整體外觀美感，而且當鏡 產生^頂推耳蓋板30外張時’相對亦對螺检40 無法#二頂力，極容易造成螺栓40鬆脫、鏡片20 ^於進而衍生使用者每隔一段時間便須旋緊 螺栓40 4種種問題及使用上之困擾。 整裝is二本=遂=全帽鏡片固定分段調 ’亚在經過錢研究設計及修改後而有本發明之 【發明内容】 定分月η的係為了提供一種安全帽鏡片固 敕—彳fr过i衣置主要具有結合穩定度優良以及分段調 正疋位確實之優點及功效者。 片固ί㈡2ί，ΐ;明人特別設計-種安全帽鏡 = 整ί置’包含-安全帽帽殼、-弧形鏡片 門外一、#^板1^、中，安全帽帽殼兩侧適當位置處分別 型山署ΐ =壁面固設一對鎖接片，該鎖接片頂 鈿成型一肷置於帽殼透孔中之圓形中空卡掣座， 座體成型有一缺口，座體内部嵌置一彈性扣環， 2型有對應座體缺口之定位凸塊，令定位凸塊心座 殼内部之背側則成型有卡掣階面，該鎖接片底 ：： 1247588 凸設由内向外穿出帽殼外部之卡接桿；鏡片兩端分別開 設一穿孔，穿孔之内孔緣成型若干連續狀定位凹陷，該 鏡片之穿孔外側另開設一道弧形限位槽；耳蓋板之板片 内側面一體凸設一插接桿，插接桿頂端形成τ型凸塊； 又，卡掣座外圍凸設一道對應鏡片限位槽之弧形凸垣， 且接近底端處係成型對應鎖接片卡接桿之内凹卡接座； 藉以上設置，令耳蓋板覆蓋於鏡片兩端外側，使其内側 面之弧形凸垣嵌置於鏡片之限位槽中，而鎖接片卡掣座 内部扣環之定位凸塊則卡固於鏡片穿孔内孔緣之定位凹 陷中形成定位，當耳蓋板之插接桿穿過鏡片之穿孔後係 再穿過帽殼鎖接片之扣環與矩形孔，然後轉動一角度， 使插接桿之τ型凸塊卡掣於鎖接片之卡掣階面上，最後 將鎖接片底端之卡接桿插掣於耳蓋板之卡接座内形成結 合定位，藉之，令鏡片可在帽殼與耳蓋板之間作掀啟及 蓋合動作，並於鎖接片扣環之定位凸塊卡掣於鏡片穿孔 之定位凹陷時達成定位者。 【實施方式】 關於本發明人藉以達致上述目的而採用之技術手段 ，茲舉一種較佳實施例配合圖式於下文進行詳細說明， 俾供鈞上深入了解並認同本發明。 請參閱第二、三圖所示，本發明係由一安全帽帽殼 1、一弧形鏡片2及一對耳蓋板3構成（惟，由於本發 明係採左右對稱設計，故在圖面之表示上，本發明人特 地選擇僅揭露單側構造，另側則單純為相對應之結構， 不予示出）；其中： 安全帽帽殼1，如第二圖所示，帽殼1兩側適當位 置處（適於供鏡片2兩端裝設之位置）分別開設一透孔 11，帽殼1兩側内壁面分別以鉚釘固設結合一對鎖接片 12，鎖接片12頂端成型一嵌置於帽殼1透孔11中之圓形 1247588 丄空卡掣座121，卡掣座121座體成型有一對呈相對狀態 設置之缺口 122，座體内部嵌置一彈性扣環13，該扣環13 係呈腰部内縮狀態而可做彈性伸縮，該扣環13相對於腰 部之兩端係一體成型有對應座體缺口 122之定位凸塊131 及卡掣凸塊132，令定位凸塊131及卡掣凸塊132分別凸出 座體缺口 122外端；卡掣座121中央開設一矩形孔123，矩 形孔123朝向帽殼1内部之背側則成型有一對卡掣階面 124 (如第三圖所示），該鎖接片丨2底端係一體凸設由内 向外穿出帽殼1外部之卡接桿125 ; 鏡片2，如第二圖所示，鏡片2兩端分別開設一穿 ^21，穿孔21之内孔緣成型若干連續狀定位凹陷2U，該 等定位凹陷211之對侧内孔緣係另外成型一卡掣凹陷212 ’該鏡片2之穿孔21外侧另開設一道弧形限位槽22 ; 耳蓋板3係覆蓋於鏡片2兩端外側之板片，如第二 圖所示，板片朝向安全帽帽殼1之内侧面一體凸設一插 接榉31，插接桿31頂端形成τ型凸塊311 ;又，插接桿31 外側凸設一道對應鏡片2限位槽22之弧形凸垣32，且接 近耳蓋板3之底端處係成型有對應鎖接片12卡接桿125 之内凹卡接座33。 關於本發明之組裝結合則請參閱第四至七圖所示， 首先令耳蓋板3覆蓋於鏡片2兩端外側，使其内侧面之 弧形凸垣32嵌置於鏡片2之限位槽22中，而鎖接片12之 卡掣座121内側扣壞13之定位凸塊131與卡掣凸塊13 2貝ij 分別卡固於鏡片2穿孔21内孔緣之定位凹陷211與卡掣 凹陷212中形成定位，再令耳蓋板3之插接桿31由外向内 依序穿過鏡片2之穿孔21及帽殼1鎖接片12之彈性扣環 13及矩形孔123 (如第四圖所示），然後轉動一角度，如 第五圖所示，使插接桿31之T型凸塊311卡掣於鎖接片12 之卡掣階面124上，再將耳蓋板3底端略為外掀然後略作 1247588 旋動，使耳蓋板3之卡接座33對準凸伸出帽殼1外部之 ^接桿125，最後放開耳蓋板3，使鎖接片12底端之卡接 桿125插掣於耳蓋板3之卡接座33内形成結合定位，藉 之，遂令耳蓋板3固設於帽殼1及鏡片2兩端之外側， 並使鏡片2可以鎖接片12之卡掣座121為轉轴進行分段 樞轉及定位，俾完成一安全帽及其鏡片固定分段調整裝 置。 接下來請參閱第八至十圖所示，當使用者操作鏡片 2進行掀啟及蓋合動作時，本發明之鏡片2係利用其穿 孔21内孔緣之疋位凹陷211及卡掣凹陷212，與鎖接片12 内部扣環13之定位凸塊131及與卡掣凸塊132之相互卡掣 進行，位，惟，由於本發明之鏡片2穿孔21之内孔緣僅 成型單^掣凹陷212而已，且該卡掣凹陷212又位於鏡 片2完全蓋合之角度，因此當鏡片2轉動至完全掀啟及 半掀啟之角度時（即如第八及九圖所示之角度），則僅有 扣環13之定位凸塊131嵌置於穿孔21内孔緣之定位凹陷 2中進行疋位而已’此時扣環13之卡掣凸塊132會因為 ^環13之彈性而形成内縮狀態；另當鏡片2轉動至完全 蓋合之角度時（即如第十圖所示之角度），則由於卡掣座 121之兩個缺口 122同時對準鏡片2穿孔21内孔緣之定位 凹陷211及卡掣凹陷212的緣故，使扣環13之定位凸塊131 與^掣凸塊132同時凸伸出卡掣座121之缺口 122中並分 別肷置於鏡片2穿孔21内孔緣之定位凹陷2 π及卡掣凹 陷212。中形成雙重定位卡掣狀態，使鏡片2之定位更加確 實而穩固。 藉由上述說明可知本發明之耳蓋板3主要係利用立 内側插接桿31之T型凸塊31ι與帽殼i内侧鎖接片12之$ 掣階面124相互卡掣之方式，使耳蓋板3與鏡片2結合於 帽殼1外侧面，有效解決習知利用螺栓進行螺接鎖固而 1247588 破壞外觀美感之問題，不僅提昇安全帽之外觀美感及整 體性，更利用鎖接片12卡掣座121内部扣環13之定位凸塊 131與卡掣凸塊132與鏡片2穿孔21内孔緣之定位凹陷▲ 211及卡掣凹陷212相互卡掣配合之設計，達致分段定位 定位確實之目的與訴求，同時解決習知操作鏡片旋 導致耳蓋板被迫外張，以及必須時常旋緊螺栓之困 擾01247588 IX. Description of the Invention: [Technical Field] The present invention relates to a safety cap lens fixing segment adjusting device, and more particularly to a lens that can be firmly coupled to a safety helmet and can be used when the lens is opened in a segment. The fixed segment adjustment device that is positioned correctly has the advantages and advantages of excellent combination stability and segmentation adjustment positioning. [Previous Art] According to the first embodiment, the fixing and adjusting device of the conventional safety helmet lens mainly comprises a safety helmet cap 10, a curved lens 20, a pair of ear cover 30 and a plurality of bolts 40. A locking hole 101 is defined at a suitable position on both sides of the cap shell 10; a through hole 201 is defined in each of the two ends of the curved lens 20; and the opposite inner side surface of the ear cover 30 is convexly inserted into the arc The hollow shaft 301 of the lens 20 is formed in the through hole 201. The convex shaft 301 of the pair of ear cover 30 is inserted into the through hole 201 at both ends of the lens 20, and then the bolt 40 is passed through the ear cover 30. The protruding shaft 301 is locked in the locking hole 101 of the cap shell 10, and the lens 20 is pivoted or closed by the convex shaft 301 of the ear cover 30 as a rotating shaft. Moreover, in order to ensure that the lens 20 of the helmet can be positioned after the opening or closing, the outer side of the lens 20 and the inner side of the ear cover 30 (ie, the lens 20 and the ear cover 30 are attached). The positioning protrusions 202 and the positioning protrusions 302 are respectively formed corresponding to each other. When the lens 20 is pivoted to a fixed angle, the positioning protrusions 302 on the inner side of the ear cover 30 are embedded in the positioning recess of the lens 20. A card positioning state is formed in 202. However, after intensive studies on the fixing and adjusting device of the above-mentioned hard hat lens by the present inventors, the following defects have been found, which will be described in detail below. Referring to the first figure, since the lens 20 is interposed between the helmet cap 10 and the ear cover 30, when the lens 20 is opened or closed, the 1247588 is used as a day guard, often because of the mirror 2 ^ ^ ^ ^ ^ ^ ^ ^ For the reason of the positioning of the convex granules 302, T concave, 2 two has not been T, so that the lens does not splicing, the phenomenon 'so-to, then i born and installed ^ JT T bucket board 30 Producing an extrapolation force, not only will the 302 be smoothed but the It card will operate to cause the positioning of the convex granules. In addition, because the pound Μ?n hat ΐ ίο on the board 3 0 2 ΐ ΐ using the screw check 40 direct locking combined with the hard hat piece ^ reduction, not only affects the overall appearance of the helmet, but also when the mirror produces ^ push When the ear cover 30 is stretched out, it is relatively close to the screw inspection 40. It is easy to cause the bolt 40 to loosen, and the lens 20 ^ and then the user must tighten the bolt 40 at intervals. Trouble with use. The whole assembly is two = 遂 = full-hat lens fixed segment adjustment 'Asia after the money research design and modification, and the present invention [invention content] is to provide a hard hat lens solid 敕 彳Fr over i clothing mainly has the advantages of combination stability and the advantages and functions of the segmentation correction position.固固 ί (2) 2 ί, ΐ; Ming people specially designed - kind of helmet mirror = ί 置 'included - helmet cap, - curved lens door, # ^ plate 1 ^, medium, the appropriate position on both sides of the helmet cap Separate type of mountain ΐ = wall fixed a pair of locking pieces, the top piece of the locking piece is formed into a circular hollow cassette seat placed in the through hole of the cap, the seat body is formed with a notch, and the seat body is embedded An elastic buckle is arranged, and the type 2 has a positioning protrusion corresponding to the notch of the seat body, so that the back side of the positioning convex core seat shell is formed with a stepped surface, the bottom of the locking piece: 1247588 protruding from the inside to the outside The card is inserted outside the cap; a perforation is formed at each end of the lens, and a plurality of continuous positioning recesses are formed in the inner edge of the perforation, and an arc-shaped limiting groove is formed on the outer side of the perforation of the lens; A plug rod is integrally formed on the inner side surface, and a top end of the plug rod forms a τ-shaped bump; and a curved convex portion corresponding to the lens limiting groove is protruded from the outer side of the latch seat, and the corresponding locking is formed near the bottom end. The concave card holder of the chip card post; with the above arrangement, the ear cover is covered on the outer side of the two ends of the lens The curved convex portion of the inner side surface is embedded in the limiting groove of the lens, and the positioning convex portion of the inner buckle of the locking piece clamping seat is fixed in the positioning recess of the inner hole edge of the lens perforation to form a positioning. When the insertion rod of the ear cover passes through the perforation of the lens, it passes through the buckle of the cap lock piece and the rectangular hole, and then rotates at an angle, so that the τ-type protrusion of the insertion rod is stuck on the locking piece Finally, the card post of the bottom end of the locking piece is inserted into the card holder of the ear cover to form a combined position, so that the lens can be made between the cap and the ear cover. The opening and closing action is achieved, and the positioning is achieved when the positioning protrusion of the locking piece buckle is engaged with the positioning recess of the lens perforation. [Embodiment] The present invention has been described in detail with reference to the preferred embodiments of the present invention. Referring to the second and third figures, the present invention is composed of a helmet cap 1, a curved lens 2 and a pair of ear covers 3 (however, since the invention adopts a bilaterally symmetrical design, the figure is In the representation, the inventors specifically chose to expose only the one-sided structure, and the other side is simply the corresponding structure, not shown); wherein: the helmet cap 1, as shown in the second figure, the cap 1 A through hole 11 is defined in a suitable position on the side (suitable for the two ends of the lens 2), and the inner wall surfaces of the two sides of the cap 1 are respectively fixed with a pair of locking pieces 12 by rivets, and the top of the locking piece 12 is formed. a circular 1247588 hollow cassette seat 121 embedded in the through hole 11 of the cap 1 , the base of the cassette seat 121 is formed with a pair of notches 122 disposed in a relative state, and a resilient buckle 13 is embedded in the seat body. The buckle 13 is elastically stretched and contracted in a waist-retracted state. The buckle 13 is integrally formed with a positioning protrusion 131 and a latching protrusion 132 corresponding to the seat notch 122 with respect to the two ends of the waist portion, so as to position the convex portion 13 The block 131 and the latching protrusion 132 respectively protrude from the outer end of the seat notch 122; a moment is formed in the center of the latching seat 121 The hole 123, the rectangular hole 123 facing the back side of the inside of the cap 1 is formed with a pair of latching steps 124 (as shown in the third figure), and the bottom end of the locking tab 2 is integrally protruded from the inside to the outside. The outer connecting rod 125 of the shell 1; the lens 2, as shown in the second figure, the two ends of the lens 2 are respectively provided with a through hole 21, and the inner edge of the through hole 21 is formed with a plurality of continuous positioning recesses 2U, and the positioning recesses 211 The opposite side of the inner hole edge is additionally formed with a click recess 212. The outer side of the through hole 21 of the lens 2 is further provided with an arc-shaped limiting groove 22; the ear cover 3 is a plate covering the outer side of the lens 2, such as the second As shown in the figure, a plug 榉 31 is integrally protruded toward the inner side surface of the helmet cap 1 , and a tiara-shaped bump 311 is formed at the top end of the plug rod 31. Further, a corresponding lens 2 is protruded outside the plug rod 31 The arcuate cam 32 of the slot 22 is adjacent to the bottom end of the ear cover 3 to form a female latching seat 33 corresponding to the latching lever 125 of the locking tab 12. For the assembly and assembly of the present invention, please refer to the fourth to seventh figures. First, the ear cover 3 is covered on the outer sides of the two ends of the lens 2, so that the curved convex ridges 32 on the inner side surface are embedded in the limiting slots of the lens 2. 22, and the positioning protrusion 131 and the latching protrusion 13 2 ij of the inner side of the latching piece 121 of the locking piece 12 are respectively fastened to the positioning recess 211 and the sag of the hole edge of the through hole 21 of the lens 2 Positioning is formed in 212, and then the insertion rod 31 of the ear cover 3 is sequentially passed through the through hole 21 of the lens 2 and the elastic buckle 13 and the rectangular hole 123 of the locking piece 12 of the cap 1 from the outside to the inside (as shown in the fourth figure) And then turning an angle, as shown in the fifth figure, the T-shaped bump 311 of the insertion rod 31 is clamped on the stepped surface 124 of the locking piece 12, and then the bottom end of the ear cover 3 is Slightly outward, then slightly 1247588, so that the card holder 33 of the ear cover 3 is aligned with the protrusion 125 protruding from the outside of the cap 1, and finally the ear cover 3 is released, so that the bottom end of the locking piece 12 The card post 125 is inserted into the card holder 33 of the ear cover 3 to form a combined position, and the ear cover 3 is fixed on the outer sides of the cap 1 and the lens 2, and the lens 2 can be Locking tab 12 Block segment latch 121 and the pivot shaft is positioned, and serve to complete a helmet lens fixing segment adjusting means. Next, as shown in the eighth to tenth embodiments, when the user operates the lens 2 to perform the opening and closing operations, the lens 2 of the present invention utilizes the depression 211 and the depression 212 of the inner edge of the perforation 21 thereof. And the positioning protrusions 131 of the inner buckle 13 of the locking piece 12 and the latching protrusions 132 are engaged with each other. However, since the inner edge of the perforation 21 of the lens 2 of the present invention is only formed into a single depression 212, and the latching recess 212 is again at the angle at which the lens 2 is completely closed, so when the lens 2 is rotated to the angle of full opening and half opening (ie, the angles shown in FIGS. 8 and 9), Only the positioning protrusion 131 of the buckle 13 is embedded in the positioning recess 2 of the hole edge of the through hole 21 for clamping. At this time, the latching protrusion 132 of the buckle 13 is retracted by the elasticity of the ring 13 State; when the lens 2 is rotated to the fully closed angle (ie, the angle shown in FIG. 10), the two notches 122 of the latching seat 121 are simultaneously aligned with the positioning recesses of the inner edge of the through hole 21 of the lens 2. 211 and the depression 212, the positioning protrusion 131 of the buckle 13 and the protrusion 132 are simultaneously protruded The recesses 122 of the latching seat 121 are respectively placed in the positioning recesses 2 π and the latching recesses 212 of the hole edges in the through holes 21 of the lens 2. The double positioning jam state is formed to make the positioning of the lens 2 more realistic and stable. It can be seen from the above description that the ear cover 3 of the present invention mainly uses the T-shaped bump 31 of the vertical inner insertion rod 31 and the 掣 step 124 of the inner locking piece 12 of the cap i to be engaged with each other. The cover plate 3 and the lens 2 are coupled to the outer side of the cap 1 to effectively solve the problem that the bolts are bolted and locked, and the 1247588 destroys the aesthetic appearance, which not only enhances the aesthetic appearance and integrity of the helmet, but also utilizes the locking piece 12 The positioning protrusion 131 of the inner buckle 13 of the cassette seat 121 and the positioning protrusion ▲ 211 of the inner edge of the hole 21 of the lens 2 and the latching recess 212 of the lens 2 are matched with each other to achieve segment positioning positioning. The purpose and appeal of the problem, while solving the problem of the conventional operation of the lens rotation, the cover of the ear is forced to be stretched, and the bolt must be tightened from time to time.
綜上所述，本發明之「安全帽鏡片固定分段調整裝 所揭露之技術手段確能有效解決習知安全帽相關設 °白妙i種種問題，並達致預期之目的與功效，誠屬利用 則之技術思想之發明，洵已具備發明專利要件鉦 ί感it法提出申請’懇祈鈞上惠予詳審並賜准專利”: ^【圖式簡單說明】 圖所示係習知安全帽之立體分解圖。 =二圖所示係本發明之局部立體分解圖。 示係本發明鎖接片之另—角度立體示意圖。 圖所:係本發明之組裝狀態示意圖一。 =所示係本發明之組裝狀態示意圖二。In summary, the technical means disclosed in the "safety cap lens fixed segment adjustment device" of the present invention can effectively solve various problems related to the conventional helmet-related design, and achieve the intended purpose and effect. Then the invention of the technical idea, 洵 already has the invention patent requirements 钲ί senseit method to apply for '恳 钧 钧 钧 详 详 详 详 详 详 详 详 详 详 详 详 详 : : : : : : : : : : : : : : : : : : : : A three-dimensional exploded view. = The two figures show a partial exploded view of the present invention. Show another perspective perspective view of the locking tab of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of the assembled state of the present invention. = is shown in Figure 2 of the assembled state of the present invention.
^二，所示係本發明之組農狀態示意圖三。 第八，ΐ示係本發明之組裝完成狀態示意圖。 第九係本發明之鏡片操作示意圖；完全掀啟狀態。 示係本發明之鏡片操作示意圖；半掀啟狀態。 係本發明之鏡片操作示意圖；完全蓋合狀態。 l主要元件符號說明】 【習知部分】 10〜-帽殼 101—鎖接孔 9n 201--^., ΟΛΟ 頌按孔 20---鏡片 3〇1_ ^ 202---定位凹陷 3〇___耳蓋板 車 302---定位凸粒 40---螺栓 10 1247588 【本創作部分】 1 - --帽殼 11 ---透孔 12 — -鎖接片 121- --卡掣座 122—缺口 123— -矩形孔 124- --卡掣階面 125 —卡接桿 13 — -扣環 131- --定位凸塊 132---卡掣凸塊 2- -鏡片 21- -一穿孔 211---定位凹陷 212 — -卡掣凹陷 22- --限位槽 3 —耳蓋板 31-- -插接桿 311- --凸塊 32---凸垣 33— -卡接座 11^2, which is shown in Figure 3 of the agricultural state of the present invention. Eighth, the drawing is a schematic diagram of the assembled state of the present invention. The ninth is a schematic diagram of the operation of the lens of the present invention; Shown is a schematic diagram of the operation of the lens of the present invention; It is a schematic diagram of the operation of the lens of the present invention; it is completely covered. l Description of main component symbols] [Learn part] 10~-Cap 101—Locking hole 9n 201--^., ΟΛΟ 颂 Pressing hole 20---Lens 3〇1_ ^ 202---Positioning recess 3〇_ __ Ear cover car 302---positioning convex 40---bolt 10 1247588 [This creation part] 1 - -- Cap 11 --- through hole 12 — - locking piece 121 -- -- cassette seat 122-notch 123--rectangular hole 124---clip step surface 125-clip rod 13--retaining ring 131--positioning cam 132---clicking lug 2--lens 21--one perforation 211---positioning recess 212 - - cassette recess 22 - - limiting slot 3 - ear cover 31 - - plug rod 311 - - bump 32 - bet 33 - - card holder 11