1274010 九、發明說明： 【發明所屬之技術領域】 本發明主要係揭示一種自行車五通主軸組件結構，尤 指可適用不同尺寸五通管之自行車五通主軸組件結構者。 【先前技術】 按，社會的結構形態日新月異，人們所需求的生活品 質相對提高，對事物的要求也從「能用就好」的老舊思維， 變得相當細腻，唯有不斷進步或創新的構想，才能滿足現 代社會的需求。 請參照我國專利證書號數第M258923號之「自行車五 通管之齒心軸結構改良」專利案，其主要包括有一五通管 1、一主動齒盤2、二腳踏桿3、一齒心軸21、一内鎖結帽 23及一外鎖結帽24。該齒心軸21之兩端分別形成有結合 段211，該齒心軸21穿設於該五通管丨時係將兩端之結合 段211穿出於外，並分別裝設該腳踏桿3，而其中一端還 組设该主動齒盤2。該齒心軸21相反於該主動齒盤2之一 端還設有調整螺紋段212，該調整螺紋段212係可供該内 鎖結帽23及該外鎖結帽24螺設，藉以將該五通管1定位 於§亥齒心軸21靠近該主動齒盤2之一端，而防止餘隙之產 生。 ’、 該習知結構於實用上仍有多處缺點，因其於使用時係 先將内鎖結帽23螺緊於該五通管1之端面，之後再將外鎖 結帽24螺緊至該五通管丨之端面，兩次的螺緊動作徒增組 5 1274010 裝上的手續，使用上相當不便。 又該内鎖結帽23螺緊之力較該外鎖結帽㈣大時， 该五通管i僅受到該内鎖結帽23的緊迫，使該 ^^。^之_卜鎖結帽％螺緊之力較該内鎖結 目23為大時，則紅通fl僅受到該外鎖結帽_ 使该内鎖結帽23形同虛設。 除此之外，該内、外鎖結帽23、24皆設於該腳踏桿3 =亥五通管1之間’並雜露於該腳踏桿3外，故其供板 3間相當狹窄，於扳動時容易受到該腳踏桿3及該五 通管1的阻礙’而無法糊的進行螺H，使用上相舍 麻煩’此種不符產業利㈣設計㈣的不實用故有 之必要。 有鑑於上述習知結構之缺失，本發明人乃發明出一種 =打車五通絲組件結構』，其射克服上述習 所有缺點。 【發明内容】 pur^ $自行車五通主軸組件結構』所欲解決之技術 糸於。亥白知結構於使用時係先將内鎖結帽螺緊於 “五通管之端面，之後再將外鎖結帽螺緊至該五通管之端 兩人的螺㈣作徒增崎上的手續，制上相當不便。 =_鎖結帽螺緊之力較該外鎖結帽為大時，則該五通管 結帽的緊迫，使該外鎖結帽形同虛設。反之 / Ά螺緊之力較軸鎖結帽為大時，職五通管 1274010 僅受到該外鎖結帽的緊迫，使該_結帽形同虛設。除此 之外納夕卜鎖結帽皆設於該腳踏桿與該五通管之間， 並非裸露於該㈣桿外，故於扳鱗料受職腳踏桿及 該五通管的阻礙，而無法順·進行·功，使用上相 當麻煩’故亟有待於改進。 本，明『自行車五通主軸組件結構』，其包括有一轴 ^ 第曲柄、一第二曲柄與一定位裝置；該軸心係設1274010 IX. Description of the Invention: [Technical Field] The present invention mainly discloses a bicycle five-way spindle assembly structure, and in particular, a bicycle five-way spindle assembly structure that can be applied to different size five-way tubes. [Prior Art] According to the changing structure of society, the quality of life demanded by people is relatively higher, and the requirements for things are also becoming more delicate from the old thinking of being able to use. Only continuous improvement or innovation The idea can meet the needs of modern society. Please refer to the Patent No. M258923 of China Patent No. M258923 for the improvement of the toothed mandrel structure of bicycle five-way pipe, which mainly includes a five-way pipe 1, an active toothed disk 2, two foot pedals 3, and one tooth. The mandrel 21, an inner lock cap 23 and an outer lock cap 24 are provided. The two ends of the toothed mandrel 21 are respectively formed with a coupling section 211. When the toothed mandrel 21 is inserted through the five-way pipe, the coupling sections 211 of the two ends are worn out, and the pedals are respectively installed. 3, and the active toothed disc 2 is also assembled at one end. The toothed spindle 21 is further provided with an adjusting thread segment 212 opposite to one end of the driving toothed disc 2, and the adjusting threaded section 212 is provided for the inner locking cap 23 and the outer locking cap 24 to be screwed. The through pipe 1 is positioned near the one end of the active toothed disc 2 to prevent the occurrence of a clearance. 'The conventional structure still has many disadvantages in practical use, because it is screwed tightly to the end face of the five-way pipe 1 before being used, and then the outer lock cap 24 is screwed to The end face of the five-way pipe, the two tightening action, the addition of the 5 1274010 installation procedure, is quite inconvenient to use. When the force of the inner lock cap 23 is larger than that of the outer lock cap (four), the five-way pipe i is only pressed by the inner lock cap 23 to make the ^^. When the force of the 锁 结 结 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % In addition, the inner and outer lock caps 23, 24 are disposed between the footrest 3 = the five-way pipe 1 and are exposed outside the pedal bar 3, so that the plate 3 is equivalent It is narrow, and it is easy to be obstructed by the footrest 3 and the five-way pipe 1 when it is pulled, and it is impossible to paste the screw H, and it is troublesome to use the same. This is not practical and does not conform to the industrial (4) design (4). necessary. In view of the above-mentioned lack of the conventional structure, the inventors have invented a structure of a five-way wire assembly that overcomes all of the above disadvantages. [Summary of the Invention] Pur^ $ bicycle five-way spindle assembly structure is the technology to be solved. When the structure is used, the inner locking cap is screwed tightly to the end face of the five-way pipe, and then the outer locking cap is screwed to the end of the five-way pipe (four). The procedure is quite inconvenient. If the force of the lock cap is tighter than that of the outer lock cap, the tightness of the five-way pipe cap makes the outer lock cap the same. Otherwise / the screw is tight When the force is larger than the shaft lock cap, the position five-way tube 1274010 is only pressed by the outer lock cap, so that the _ knot cap is the same as the dummy. In addition, the natch lock cap is set on the pedal Between the five-way pipe and the five-way pipe, it is not exposed outside the (four) pole. Therefore, it is difficult to carry out the work of the foot pedal and the five-way pipe, and it is not very convenient to use. The present invention discloses a bicycle five-way spindle assembly structure, which comprises a shaft crank, a second crank and a positioning device;
於自行車之五砂内，且_心與五通管之間設有軸承， 以亥軸心於五通官内旋轉，該軸心之兩端分別穿伸出五 ，管，兩端，姉心之兩端分卿成有—基準端與一調整 端；該第—曲柄之1設有—可結合於錄心、基準端之結 合孔，而與姉心產生相互連動關係；該第二曲柄之一端 設有-可結合於軸心婦端之結合孔，而與絲心產生 相互連動關係，该定位裝置包括有_定位件與一調整件， 該定，件係穿設於該第二曲柄上，且較位件之—端可與 五通g内之轴承相接觸，該調整件係可旋轉的設於第二曲 柄=侧’且該調整件之—端減於該定位件上；藉此， 3定位裝置可使該軸d的軸承與五通管之間形成一良好 的配合’防止随產生，並達到剌多種不同尺寸五通管 之功效。 八他目的、優點和本發明的新穎特性將從以下詳細的 描述與相關的附圖更加顯明。 【實施方式】 7 1274010 有關本發明所採用之技術、手段及其功效，茲舉一較 佳實施例並配合圖式詳述如後，此僅供說明之用，在專利 申請上並不受此種結構之限制。 參照第一圖與第二圖，本發明包括有一軸心2〇、一第 一曲柄30、一第二曲柄40與一定位裝置5〇 ;該軸心2〇 係可樞轉的找於自行車之五通管1G内，該二曲柄3〇、 40則分別套設於該軸心20之兩端，該定位裝置5〇係穿設 於該第二曲柄40上，且頂掣於五通管1〇之一端，而可使 不同尺寸之五通管10皆可與該軸心2〇之間形成一良好之 定位效果。其中： 請同時配合參照第三圖，自行車之五通管10兩端分別 裝設有一軸承座11 ’該軸承座u設有一較小徑之套接部 111與一較大徑之嵌合部112,該套接部ln係設置於該五 通管10内。該嵌合部112内則嵌設有一軸承12。而該二 轴承座11於該軸承12之外側還分別蓋設有一襯套13，用 以將a亥軸承12封閉於該軸承座11内。 該軸心20係可樞轉的設於自行車之五通管1〇内，並 Ϊ其=端分別穿伸出五通管10之兩端。該軸心20係設為 中空官狀，且其兩端可分別結合一固定件21，該固定件 21與忒軸心20之間係以螺紋配合者。 該軸心20之兩端分別形成有一基準端22與一調整端 雜準端22設有—軸冑221，姉部221 #可與五通 1〇私之軸承12相配合。該軸心20於該基準端22之 Μ 221夕卜端還輛向延伸出有一結合部⑽。該轴心別之 I274〇i〇 調整端23亦設有一軸部231’該軸部231係可與五通管1〇 遠離於該基準端22之軸承12相配合。該軸心2〇於該^整In the five sands of the bicycle, and there is a bearing between the _ heart and the five-way pipe, and the inner axis of the axis is rotated in the five-way official, and the two ends of the axial center respectively extend out five, the tube, the two ends, and the heart The two ends are divided into a reference end and an adjustment end; the first crank 1 is provided - can be coupled to the combined hole of the recording core and the reference end, and is interlocked with the center of the heart; the second crank is One end is provided with a coupling hole that can be coupled to the axial end of the shaft, and is interlocked with the silk core. The positioning device includes a positioning member and an adjusting member, and the fixing member is disposed on the second crank. And the end of the positioning member is in contact with the bearing in the five-way g, the adjusting member is rotatably disposed on the second crank=side' and the end of the adjusting member is reduced on the positioning member; 3, the positioning device can form a good fit between the bearing of the shaft d and the five-way pipe to prevent the generation and the effect of a plurality of different-sized five-way pipes. The objects and advantages of the invention and the novel features of the invention will be more apparent from the following detailed description. [Embodiment] 7 1274010 The technology, the means and the functions thereof used in the present invention are described in detail with reference to the drawings, which are for illustrative purposes only, and are not applicable to the patent application. The limitations of the structure. Referring to the first and second figures, the present invention includes a shaft 2〇, a first crank 30, a second crank 40 and a positioning device 5〇; the shaft 2 is pivotally positioned for the bicycle. In the five-way pipe 1G, the two cranks 3〇 and 40 are respectively sleeved on the two ends of the shaft core 20, and the positioning device 5 is threaded on the second crank 40, and the top is connected to the five-way pipe 1 One end of the crucible can be used to form a good positioning effect between the five-way tube 10 of different sizes and the shaft 2〇. Wherein: Please also refer to the third figure, the two ends of the bicycle five-way pipe 10 are respectively provided with a bearing seat 11 'the bearing seat u is provided with a smaller diameter sleeve portion 111 and a larger diameter fitting portion 112 The socket portion ln is disposed in the five-way pipe 10. A bearing 12 is embedded in the fitting portion 112. The two bearing housings 11 are respectively covered with a bushing 13 on the outer side of the bearing 12 for enclosing the a-sea bearing 12 in the bearing housing 11. The shaft center 20 is pivotally disposed in the five-way pipe of the bicycle, and its = end is respectively extended through the two ends of the five-way pipe 10. The shaft core 20 is formed in a hollow shape, and a fixing member 21 is respectively coupled to the two ends thereof, and the fixing member 21 is threadedly engaged with the shaft core 20. The two ends of the shaft 20 are respectively formed with a reference end 22 and an adjusting end. The miscellaneous end 22 is provided with a shaft 221, and the shank 221 # can cooperate with the bearing 12 of the five-way. The shaft core 20 extends from the base end of the reference end 22 to a joint portion (10). The shaft end of the shaft is also provided with a shaft portion 231' which is engageable with the bearing 12 of the five-way tube 1 away from the reference end 22. The axis 2 is in the same
^ 23之轴部231外端還軸向延伸出有一結合部232。U 該第一曲柄30係套設於該軸心2〇之基準端22，且玎 與該軸心20產生相互連動關係。該第一曲柄3〇於一端設 有一結合孔31，該結合孔31係套設於該軸心2〇基準端22 之結合部222上，再以該固定件21穿過該結合孔31而固 § 定於該轴心20上者。於本實施例中該軸心20基準端22 之結合部222與該第一曲柄3〇之結合孔31之間係以凹凸 狀齒相互配合者。該第一曲柄3〇具有結合孔31之一端上 還設有放射狀之延伸部32，該延伸部32係可用以裝設齒 盤（圖中未示）者。 該第二曲柄40係套設於該軸心2〇之調整端23，且可 與该軸心20產生相互連動關係。該第二曲柄4〇於一端設 有一結合孔41，該結合孔41係套設於該軸心2〇調整端23 ^ 之結合部232上，再以該固定件21穿過該結合孔41而固 疋於該軸〜20上者。於本實施例中該軸心2〇調整端μ 之結合部232與該第二曲柄4〇之結合孔41之間係以凹凸 狀齒相互配合者。 該第二曲柄40於靠近該結合孔41之周侧則開設有數 個軸向延伸之通孔42,於本實施例中係以開設三個通孔42 為最佳表示者。該第二曲柄之結合孔41遠離於五通管 10之一側還形成有一容置部43者。 該定位裝置50係穿設於該第二曲柄40之通孔42處， 9 1274010 並頂掣於五通管ίο之一端，以使五通管10與該軸心20 之間獲得一良好之定位效果。該定位裝置包括有一定位 件51與一調整件52，該定位件51於一端形成有一抵壓環 511，該抵壓環511係可頂掣於五通管1〇之襯套13上。而 该定位件51於該抵壓環511相反於五通管之一側則設 有數個抵壓柱512，該抵壓柱512可穿伸於該第二曲柄4〇 之通孔42内。於本實施例該定位件51係設有三個抵壓柱 512 者。 該調整件52則設於該第二曲柄4〇之容置部43内，而 可抵推該定位件51突露出該通孔42之抵壓柱512，使該 定位件51之抵壓環511可頂掣於五通管丨〇之襯套13上。 於本實施例中該調整件52與該第二曲柄4〇之容置部犯 之間係以螺紋相配合者。而該調整件52之外側還設有扳動 部521，以供扳轉該調整件52緊固於該第二曲柄4〇上。 於組裝後，該軸心20、該第一曲柄30與第二曲柄4〇 三者之間的相對位置關係，係形成一固定狀態。而為了符 合國際規範，自行車之五通管10必須靠向該軸心2〇基準 =22之一侧，以使該第一曲柄3〇上之齒盤（圖中未示） 得以有一基準之參考依據。此時即可操作設於該第二曲柄 40上之定位裝置5〇,使該調整件52抵推該定位件51之抵 壓柱512,將該定位件51之抵壓環511頂掣於該五通管ι〇 之襯套13上，令該軸心2〇基準端22可靠向五通管ι〇之 一側，使五通管10與該軸心20在軸線方向上形成一良好 之定位效果。 < 1274010 參照第四圖，由於五通管1〇於生產時之長度皆會有學 明之疋位裝置50來使五通㈣與姉心2G之職到The outer end of the shaft portion 231 of the 23 is further axially extended with a joint portion 232. U The first crank 30 is sleeved on the reference end 22 of the shaft 2〇, and the 玎 and the shaft center 20 are interlocked with each other. The first crank member 3 is provided with a coupling hole 31 at one end thereof, and the coupling hole 31 is sleeved on the joint portion 222 of the reference end 22 of the shaft core 2, and the fixing member 21 is passed through the joint hole 31 to be solid. § It is fixed on the axis 20. In the present embodiment, the joint portion 222 of the reference end 22 of the shaft center 20 and the joint hole 31 of the first crank member 3 are interfitted with concave and convex teeth. The first crank 3 has a radial extension 32 on one end of the coupling hole 31, and the extension 32 can be used to mount a toothed disc (not shown). The second crank 40 is sleeved on the adjusting end 23 of the shaft 2, and can be interlocked with the shaft 20. The second crank member 4 is provided with a coupling hole 41 at one end thereof, and the coupling hole 41 is sleeved on the joint portion 232 of the shaft end 2 〇 adjustment end 23 ^ , and the fixing member 21 passes through the coupling hole 41 . Solid on the axis ~ 20 on. In the present embodiment, the joint portion 232 of the shaft center 2's adjustment end μ and the joint hole 41 of the second crank member 4b are interfitted with concave and convex teeth. A plurality of axially extending through holes 42 are defined in the second crank 40 adjacent to the peripheral side of the coupling hole 41. In the present embodiment, three through holes 42 are preferably formed. The coupling hole 41 of the second crank is further formed with a receiving portion 43 away from one side of the five-way pipe 10. The positioning device 50 is disposed at the through hole 42 of the second crank 40, and is disposed at one end of the five-way pipe ίο to obtain a good positioning between the five-way pipe 10 and the shaft 20 effect. The positioning device includes a positioning member 51 and an adjusting member 52. The positioning member 51 is formed at one end with a pressing ring 511. The pressing ring 511 is attached to the bushing 13 of the five-way tube 1 . The locating member 51 is provided with a plurality of pressing columns 512 opposite to the one side of the five-way pipe, and the pressing column 512 can extend through the through hole 42 of the second crank 4 。. In the embodiment, the positioning member 51 is provided with three pressing columns 512. The adjusting member 52 is disposed in the receiving portion 43 of the second crank member 4, and the pressing member 512 is protruded from the positioning member 51 to expose the pressing member 512 of the through hole 42 to make the pressing ring 511 of the positioning member 51. It can be placed on the bushing 13 of the five-way pipe. In the embodiment, the adjusting member 52 and the accommodating portion of the second crank member 4 are threaded. The adjusting member 52 is further provided with a pulling portion 521 for fastening the adjusting member 52 to the second crank member 4b. After assembly, the relative positional relationship between the axis 20, the first crank 30 and the second crank 4 is formed in a fixed state. In order to comply with international standards, the bicycle five-way pipe 10 must lean against one side of the axis 2 〇 reference = 22, so that the sprocket wheel (not shown) on the first crank 3 得以 can have a reference to the reference. in accordance with. At this time, the positioning device 5 设 disposed on the second crank 40 can be operated, and the adjusting member 52 can be pushed against the pressing column 512 of the positioning member 51, and the pressing ring 511 of the positioning member 51 can be pressed against the pressing member 511. The shaft of the five-way tube ι is so that the reference end 22 of the shaft 2 可靠 is reliably turned to one side of the five-way tube ι, so that the five-way tube 10 and the shaft center 20 form a good positioning in the axial direction. effect. < 1274010 Referring to the fourth figure, since the length of the five-way pipe 1 is at the time of production, there will be a cognitive device 50 to make the five-way (four) and the heart 2G
好的。如圖中所示之五通管10長度係較第三圖: =通官10為短，此時可將該定位裝置50之調整件52朝該 第-曲柄40之容置部43内旋人，使該調整件52抵推該定 位件51之抵壓柱512 ’並將該定位彳51之抵壓環5n頂 隼於五通官1〇之襯套13上，令五通管1()與該軸心別基 準端22之-侧相對齊，並亦達到一良好之定位效果。 參照第五圖與第六圖，為本發明的第二個實施例。本 實施例與前述實施例纽姻，其差異處在於較位裝置 =中的定位件53係實施為抵壓j袠531配合抵壓柱532之 刀，式"又计，而非第一個實施例中的一體成型設計。而本 實施例中之抵壓環531與抵壓柱532可分別採用低成本且 易於取得之墊片及銷者，如此配合該調整件52的頂推，亦 可達到相同之定位功效。 就以上所述可以歸納出本發明具有以下之優點： 乂 1·本發明『自行車五通主軸組件結構』，其中該定位裝 置係α又於该第二曲柄上，且裸露於外，可供直接扳轉操作， 使用上相當方便。 2·本發明『自行車五通主軸組件結構』，其中該定位裝 置包括一定位件與一可頂推該定位件之調整件，使用者僅 :員操H驗件即可直接將該定位件緊迫於自行車之五通 s i ’操作簡單且可達到良好之定位效果。 11 1274010 女本發明『自行車五通主輛組件結構』，其中該定位件 應環與數抵壓柱，該抵壓環與該抵壓柱可以是 彡。’亦可以是分離式設計，產業適應性相當廣 觀之’本發明極具產業上利用價值；且又未見有 =同或類似之發明出現於_外刊物或公開使用，實已符 。專利法規定之積極及消極要件，理應好發明專利。 # 唯上所述者’僅為本發明之較佳實施例而已，能 =之限疋本發明實施之範圍，故舉凡數值之變更或等效元 之置換’或依本發明申請專利範圍所作之均等變化與修 飾，皆應仍屬本發明專利涵蓋之範疇。 ^ 【圖式之簡要說明】 第一圖：為本發明之立體外觀圖。 第一圖：為本發明之立體分解圖。 % 第三圖：為本發明第一圖沿3-3剖面線所取之剖面圖。 第四圖：為本發明第三圖之另一使用例，表示定 掣於具有不同尺寸之五通管。 & 第五圖：為本發明第二個實施例之立體分解圖。 第六圖：為本發明第二個實施例之剖面圖。 附件：為我國專利申請案號第93208854號專利案。 【主要元件符號說明】 10五通管 11軸承座 12 1274010Ok. The length of the five-way pipe 10 shown in the figure is shorter than that of the third figure: = the official 10 is short, and the adjusting member 52 of the positioning device 50 can be rotated toward the receiving portion 43 of the first crank 40. , the adjusting member 52 is pushed against the pressing column 512 ′ of the positioning member 51 and the pressing ring 5 n of the positioning 彳 51 is placed on the bushing 13 of the five-way official 1 ,, so that the five-way pipe 1 () It is aligned with the side of the reference end 22 of the shaft and also achieves a good positioning effect. Referring to the fifth and sixth figures, a second embodiment of the present invention. The difference between this embodiment and the foregoing embodiment is that the positioning member 53 of the positioning device= is implemented as a knife that resists the pressure of the column 532, and is not the first one. The one-piece design in the embodiment. In the embodiment, the pressing ring 531 and the pressing column 532 can respectively adopt a low-cost and easy-to-obtain gasket and pin, so that the same positioning effect can be achieved by the pushing of the adjusting member 52. As described above, the present invention can be summarized as follows: 乂1· The "bicycle five-way spindle assembly structure" of the present invention, wherein the positioning device α is on the second crank and is exposed to the outside for direct The turning operation is quite convenient to use. 2. The "bicycle five-way spindle assembly structure" of the present invention, wherein the positioning device comprises a positioning member and an adjusting member for pushing the positioning member, and the user can directly press the positioning member directly by the member. The bicycle's five-way si' is easy to operate and achieves good positioning. 11 1274010 The invention relates to a bicycle bicycle five-way main assembly structure, wherein the positioning member should be ring-shaped and a plurality of pressing columns, and the pressing ring and the pressing column can be 彡. ‘It can also be a separate design, and the industrial adaptability is quite broad.’ The invention is extremely industrially useful; and there is no such thing as the same or similar invention appearing in the _ external publication or public use. The positive and negative elements stipulated in the Patent Law should be good for invention patents. The above is only the preferred embodiment of the present invention, and can be limited to the scope of the present invention, so that the numerical value is changed or the equivalent element is replaced or made according to the scope of the patent application of the present invention. Equal changes and modifications shall remain within the scope of the invention patent. ^ [Brief Description of the Drawing] First Picture: The stereoscopic appearance of the present invention. First Figure: An exploded perspective view of the present invention. % Third Figure: A cross-sectional view taken along line 3-3 of the first figure of the present invention. Fourth Figure: Another use case of the third figure of the present invention, which is defined as a five-way pipe having different sizes. & Fifth Figure: is an exploded perspective view of a second embodiment of the present invention. Figure 6 is a cross-sectional view showing a second embodiment of the present invention. Attachment: It is the patent application No. 93208854 of our country. [Main component symbol description] 10 five-way pipe 11 bearing seat 12 1274010
111 套接部 112 12 軸承 13 20 軸心 21 22 基準端 221 222 結合部 23 231 軸部 232 30 第一曲柄 31 32 延伸部 40 第二曲柄 41 42 通孔 43 50 定位裝置 51 511 抵壓環 512 52 調整件 521 53 定位件 531 532 抵壓柱 嵌合部 襯套 固定件 轴部 調整端 結合部 結合孔 結合孔 容置部 定位件 抵壓柱 扳動部 抵壓環 % 13111 Socket 112 12 Bearing 13 20 Axis 21 22 Reference end 221 222 Joint 23 231 Shaft 232 30 First crank 31 32 Extension 40 Second crank 41 42 Through hole 43 50 Positioning device 51 511 Pressing ring 512 52 Adjusting member 521 53 Locating member 531 532 Pressing post fitting portion Bushing fixing member Shaft adjusting end Jointing part Binding hole Binding hole Locating part Locating member Pressing column urging part pressure ring % 13