M294479 八、新型說明： 【新型所屬之技術領域】 本創作係與自行車之腳踏板《，更詳而言之，騎指-種可折疊之 腳踏板結構，該踏板之本體上軸設有上、下兩踏板，且該上、下兩踏板間 係可活動旋轉張開或閉合，以切換收藏或使用狀態者。 【先前技術】 自行車係 '為—種日f生活巾f見的交通工具，且近年來休閒的風氣日 盛’自行車也成為-種健康的休閒運動’為了外出攜帶方便，目前市面上 可見到許多種類不同之折疊自行車，其主要係於該自行車本體上設有多處 之活動關結處’俾以將該自行車本體彎折疊置，以縮小自行車之體積大小； 由於自行車之腳踏板係水平轴設於該曲柄上，俾以供使用者腳部可踩 踏施力’帶動該曲柄轉動者；，然而，該腳踏板係為水平突出於該自行車本 體外側§自行車本體曾折疊置時，會影響到自行車之折疊收藏； 而習用之自行車腳踏板，主要係包含有—主踏板及—副踏板，該主踏 板設有滑執結構可供副踏板滑套於其上，俾使得該副踏板可活動產生伸縮 動作以利收藏之用； 此種習用之自行車腳踏板容易造成強度上之不足，或是因為設計之不 田而造成施力踩踏時聊踏板鬆動折疊，對使用者造成不良之影響甚至傷 告；因此，需要一種可折疊收藏的腳踏板結構，且不會造成承受強度與正 常踩踏動作之自行車腳踏板。 【新型内容】 發明所欲解決之技術問題： M294479 由於自行車之腳踏板係水平突出於該自行車本體外側，當折叠式的自 行車收藏時，該腳踏板會影響到自行車之折疊收藏動作；而習用的兩段式 自行車腳踏板容易造成強度上之不足，或是因為設計之不當，而造成施力 踩踏時腳踏板折疊。 發明解決問題之技術手段： 本創作一種自行車腳踏板，其主要係包含有： 一踏板本體，該踏板本體中央轴設有一轉軸，該轉軸係可連接於自行 車之曲柄處； 二踏板，該踏板係分別設置於該踏板本體之上下兩側，且踏板一端係 以垂直於雜軸之方向軸設於該踏板本體上，俾使得該二踏板間可旋轉張 開或閉合者。 發明對照先前技術之功效： 本創作於該踏板本體之上、下兩側分別設置有踏板，且該踏板係以垂 直於該轉軸之方向軸設於該踏板本體上，當個者欲騎乘自行車時，可施 力扳動該該踏板，俾使得二踏板間可相闕合錄，以供制者可於其上 踩踏，並施力帶動該曲柄轉動；而當使用者欲折疊收藏自行車時，則將該 踏板扳動旋轉張開，使得二踏板與該轉軸軸心、方向呈垂直狀態，即可減少 自行車腳踏板所佔用之體積以方便收藏； 再者’本創作藉由—同步定位組分別與該二踏板連結，俾使得該二踏 板可同步產生旋轉張開或閉合之動作者； 且該二踏板之侧翼部後端係突設有—旋向定位塊，該旋向定位塊係可 與該踏板本體之擋止端形成轉祕位之_，當踏板閉合靠緊供使用者腳 M294479 部施力踩踏時’該旋向定位塊香 今 鬼又㈣力量作用而抵緊於該擋止端，俾使得 。踏板所能承受之力量大幅增加，確保踏板能具有足夠之強度； 本創作之各組裝㈣域稱設置，僅需改變同步定位崎零件之組裝 位置，即可供自行車左右兩側的腳踏板㈣，μ要針對左右腳另行開設 不同的模具，可大幅減少生產之成本。 【實施方式】 請參閱第-圖〜第二關面所示，本創作―種自行車腳踏板，其主要係 包含有： 一踏板本體（10)，其主要係概成一矩形塊狀，該踏板本體（1〇)中央軸 設有一轉軸（11),該轉軸（11)係可連接裝設於自行車之曲柄處（圖未示）， 且δ玄踏板本體（10)之側邊處係各設有一垂直於該轉軸（11)轴心方向之軸孔 (12);其中，該踏板本體（1〇)之兩側係各突伸設有一擋止端〇3); 二踏板（20)(21)，該踏板（20)(21)係分別設置於該踏板本體（1〇)之上 下兩側，且該踏板（20)(21)相對於該踏板本體（1〇)之一端係往該踏板本體 (10)之兩側各延伸設有一側翼部（201)(211)，該側翼部（201)(211)上係各 設有一旋轉孔（202)(212)，該旋轉孔（202)(212)上凹設有至少一槽孔 (203)(213);該旋轉孔（202)(212)係可供一同步齒輪（22)(23)嵌入裝設， 且該同步齒輪（22)(23)之側邊對應該槽孔（203)(213)突伸設有一插銷端 (221)(231)，俾使得該同步齒輪(22)(23)可卡置固定於該旋轉孔（202)(212) 内；該同步齒輪（22X23)之週緣處局部設有複數旋轉齒（222)(232)，且於 該同步齒輪（22)(23)中心軸向穿設有一齒輪孔（223)(233),該齒輪孔 (223)(233)係可供一穿軸(24)穿過以軸設於軸孔（12)處，且遠一同步回輪 7 M294479 (22)(23)係㈣向設置者；再者，_翼部⑽）(2U)後端係突設有一旋 向疋位塊(204)(214) ’ S旋向定位塊(204)(214)係可與該擋止端（13)形成 轉動限位之作用者； 同步疋位組（30)，該同步定位組（3〇)係至少於該踏板本體（ι〇)一側 δ又有-定位框架（31)，其主要係為一概呈矩形之中空框架，該定位框架（31) 内側緣之頂面及底面係各包含有〜滑移段(32)(33)及—排齒段㈤(⑹， 該頂面及底面之排齒段（34)(35)於該定位框架（31)内緣處各設有複數之上 ® #ι^(341)^τ##(351); 忒疋位框架（31)之滑移段(32) (33)係套設於該踏板本體（ίο)之擋止端 (13)處，且該排齒段（34)(35)係套設於該二踏板（20)(21)之同步齒輪 (22)(23)上，並使彳于該上、下排齒（341) (351)分別與該旋轉齒（222)(232) 噶合，俾使得該定位框架（31)可於該擋止端（13)上滑移，並與該二同步齒 輪(22)(23)可產生同步動作者；再者，該定位框架（31)之滑移段(32)(33) 係對應该檔止端（13)各突設有一凸塊(321)(331);且相對於該定位框架（31) • 另一侧的側翼部（201)(211)間係設有一軸承套(36)，該軸承套(36)之兩端 係分別套設於二踏板(20)(21)之旋轉孔(202)(212)内，俾使得該踏板翻轉 順利者； 明瞭以上本創作之各項細部結構後，以下係針對本創作之動作流程作 一詳細說明： 如第二圖及第三圖圖面所示，本創作係於該踏板本體（1〇)之上、下兩 側分別設置有踏板（20X21)，且該踏板（20)(21)係以垂直於該轉轴（n)2 方向軸設於該踏板本體（10)上’當使用者欲騎乘自行車時，可施力扳動該 8 M294479 為踏板(2ϋ)(21)，俾使得二踏板(2G)(21)間可相互閉合靠緊（如第二圖圖面 所示），此時二踏板⑽（21)係與該轉軸（⑴轴心方向呈水平狀態，以供使 用者可於其上踩踏’並施力帶動該曲柄轉動；而當使用者欲折疊收藏自行 車4 ’則將§亥踏板(20)(21)扳動旋轉張開（如第三圖圖面所示），使得二踏 板(20)(21)與該轉軸(11)軸心方向呈垂直狀態，以減少自行車腳踏板所姑 用之體積方便收藏者； 再者，如第四圖圖面所示，其係為本創作同步定位組(3())之動作示意 ® 目，紋健架（31)讀移段⑶）⑶)絲設於該踏板本體（⑻之擔止端 (13)處，且鼓健架⑻係可於雜止端（13)上前後滑移；而該排齒段 (34)(35)係套設於該二踏板(20)(21)之同步齒輪(22)(23)上，其中，該二 踏板(20)(21)之同步齒輪(22)(23)係為對向設置； 由於該旋轉齒（222)(232)之厚度係約略等於排齒厚度之一半，且該同 步齒輪（22)之週緣處僅有局部設有旋轉齒（222)，因此該定位框架（μ)之 上、下排齒（341)(351)係分別與上側踏板（2〇)及下側踏板⑵）之旋轉齒 • (222)(232)相互嚅合； 如第五圖圖面所示，其係為上側踏板（2〇)之同步齒輪（22)狀態示意 圖，其中，該同步齒輪（22)之旋轉齒（222)係與該定位框架（31)之上排齒 (341)相互舊合；如第六關面所示，當使用者扳動該上側之踏板(2〇)轉動 至垂直狀恶時，忒同步齒輪(22)亦隨著該踏板（2〇)轉動，並藉由該旋轉齒 (222)與上棑齒（341 )之°齒合，帶動該定位框架（31)往圖示之箭頭方向滑移； 如第七圖圖面所示，其係為下側踏板（21)之同步齒輪（23)狀態示意 圖，其中，該同步齒輪(23)之旋轉齒（232)係與該定位框架（μ)下排齒(351) 9 M294479 相互餐合；如“關面所示’當錢者扳動該下側之踏板⑵）轉動至垂 直狀態時，該同步齒輪⑵）亦隨著該踏板⑵）轉動，並藉由該旋轉齒（232) 與下排盘⑶1)之權合，帶動該定位框架⑶）往圖示之箭頭方向滑移； 藉此，當使用者扳動上側踏板(20)或下側踏板（21)其中之一時，藉由 同步齒輪(22)(23)與該定位框架（31)之詹合，可同時帶動另一踏板⑽⑼ 隨之動作，俾以達到上、下側踏板(2〇) (21)同步動作之目的； 反之，當使用者扳動踏板（20)(21)其中之一回復水平狀態時，該定位 杧木（31)亦可同步f動另一踏板(2q)(21)同步動作；或是使用者可直接推 動該定位框架（31)滑移，以同時帶動二踏板(2〇)(21)相互閉合靠緊； 本創作藉由該上、下排齒（341)(351)分別與旋轉齒（222) (232)嚅合， 俾使得該定位框架（31)於該擋止端（13)上滑移時，可帶動踏板(2〇χ21)同 步動作者； 再者，該定位框架（31)之滑移段(32)(33)係對應該擋止端（13)各突設 有一凸塊（321)(331)，且該定位框架（31)係可以塑料材質、強化纖維材質 • 或是金屬材質所製成，其本身具有些微彈性變形之能力，當該踏板(20)(21) 呈水平或垂直狀態時，該凸塊（321)(331)係可頂抵於該擋止端（13)之側 邊，以產生一阻力防止踏板(20)(21)自行鬆動旋轉，而當使用者施力扳動 踏板（20)(21)時，該定位框架（31)可受力張開變形，而使得該凸塊 (321)(331)通過該擋止端（13)，當踏板（20)(21)轉動至定位時，該定位框 架（31)即可彈性回復，並使該凸塊（321)(331)再次頂抵住該擋止端（13); 且該側翼部（201)(211)後端係突設有一旋向定位塊（204)(214)，該旋 向定位塊（204)(214)係可與該擋止端（13)形成轉動限位之作用，當踏板 M294479 (20)(21)閉合靠緊供使用者聊部施力踩踏時，該旋向定位塊（2〇4)(214)受 腳部力量作用而抵緊於該擋止端（13)，使用者踩踏之力量越大，該旋向定 位塊（204)(214)所產生的反作用力也越大’俾使得該踏板（2Q)(2i)所能承 受之力量大幅增加，確保踏板（20)(21)能具有足夠之強度； 本創作之各組裝置係為對稱設置，僅需改變同步定位組（3〇)之定位框 架（31)、同步齒輪（22)(23)及軸承套（36)等零件之組裝位置，即可供自行 車左右兩側的腳踏板使用，不需要針對左右腳另行開設不同的模具，可大 幅減少生產之成本； 雖然本案是以一個最佳實施例做說明，但精於此技藝者能在不脫離本 案精神與範’下做各種不同形式的改變。以上所舉實施侧以說明本案而 已非用以限制本案之範圍。舉凡不遠本案精神所從事的種種修改或變化， 倶屬本案申請專利範圍。 M294479 / 【圖式簡單說明】 第一圖係本創作之立體分解圖 第二圖係本創作之立體組合圖 第三圖係本創作收藏狀態之立體示意圖 第四圖係本創作同步定位組之動作示意圖（一） 第五圖係本創作上側踏板之動作示意圖（一） 第六圖係本創作上側踏板之動作示意圖（二） 鲁第七圖係本創作下側踏板之動作示意圖（一） 第八圖係本創作下側踏板之動作示意圖（二） 第九圖係本創作同步定位組之動作示意圖（二) 【主要元件符號說明】 旋轉齒（222)(232) 齒輪孔（223)(233) 穿軸(24) 同步定位組(30) 定位框架（31) 滑移段(32)(33) 凸塊（321)(331) 排齒段（34)(35) 上排齒（341) 下排齒（351) 軸承套（36) 踏板本體（10) 轉軸（11) 轴孔（12) 擋止端（13) 踏板(20)(21) 側翼部（201)(211) 旋轉孔（202)(212) 槽孔（203)(213) 旋向定位塊（204)(214) 同步齒輪(22)(23) 插銷端(221)(231)M294479 VIII. New description: [New technical field] The creation department and the pedal of the bicycle "In more detail, the riding finger-folding foot pedal structure, the main shaft of the pedal is provided The upper and lower pedals are movable and opened or closed between the upper and lower pedals to switch the collection or use state. [Prior Art] The bicycle system is a vehicle for seeing a kind of daily life towel, and in recent years, the leisure atmosphere is becoming more popular. 'Bicycles have also become a kind of healthy leisure sports'. In order to be convenient to carry out, there are many on the market. Different types of folding bicycles are mainly provided with a plurality of movable joints on the bicycle body to fold the bicycle body to reduce the size of the bicycle; since the bicycle pedals are horizontal axes Provided on the crank, so that the user's foot can be stepped on the force to drive the crank to rotate; however, the pedal is horizontally protruded outside the bicycle body § When the bicycle body is folded, it will affect To the folding collection of bicycles; the conventional bicycle pedals mainly include a main pedal and a sub-pedal, and the main pedal is provided with a sliding structure for the auxiliary pedal to slide thereon, so that the auxiliary pedal can be The activity produces a telescopic action for the collection; such a bicycle pedal is easy to cause a lack of strength, or because of the design of the field When pedaling, the pedals are loosely folded, which may cause adverse effects on the user or even be injured; therefore, a folding pedal structure is required, and the bicycle pedals that are subjected to strength and normal pedaling are not caused. [New content] The technical problem to be solved by the invention: M294479 Since the bicycle pedal is horizontally protruded outside the bicycle body, when the folding bicycle is collected, the pedal affects the folding movement of the bicycle; The conventional two-stage bicycle pedal is prone to lack of strength, or because of improper design, the pedal is folded when the force is stepped on. The invention provides a bicycle pedal, which mainly comprises: a pedal body, the central shaft of the pedal body is provided with a rotating shaft, the rotating shaft can be connected to the crank of the bicycle; the second pedal, the pedal They are respectively disposed on the upper and lower sides of the pedal body, and one end of the pedal is disposed on the pedal body with a direction perpendicular to the misalignment axis, so that the two pedals can be rotated open or closed. The invention compares the effects of the prior art: the pedals are respectively disposed on the upper and lower sides of the pedal body, and the pedals are arranged on the pedal body in a direction perpendicular to the rotating shaft, when the individual wants to ride the bicycle When the pedal is actuated, the two pedals can be slid together so that the controller can step on it and force the crank to rotate; when the user wants to fold the bicycle, the user will The pedal is rotated and opened, so that the two pedals are perpendicular to the axis and the direction of the shaft, thereby reducing the volume occupied by the bicycle pedals for convenient collection; and furthermore, the present invention uses the synchronous positioning group to respectively The two pedals are connected, so that the two pedals can synchronously generate a rotating open or closed actor; and the rear ends of the two pedals are provided with a rotation positioning block, and the rotary positioning block can The stop end of the pedal body forms a secret position, and when the pedal is closed tightly for the user's foot M294479 to exert a force on the pedal, the rotary positioning block and the ghost (4) force acts against the stop end. Make . The strength of the pedal can be greatly increased, ensuring that the pedal can have sufficient strength; the assembly of each of the creations (4) domain setting, only need to change the assembly position of the synchronous positioning parts, that is, the pedals for the left and right sides of the bicycle (4) , μ should open different molds for the left and right feet, which can greatly reduce the cost of production. [Embodiment] Please refer to the figure - the second level, the creation of the bicycle pedal, which mainly includes: a pedal body (10), which is mainly formed into a rectangular block, the pedal The central shaft of the main body (1〇) is provided with a rotating shaft (11), and the rotating shaft (11) is connectable to a crank of a bicycle (not shown), and the side of the δ Xuan pedal body (10) is provided separately. There is a shaft hole (12) perpendicular to the axial direction of the rotating shaft (11); wherein the two sides of the pedal body (1〇) are respectively provided with a stopping end 〇3); two pedals (20) (21 The pedals (20) (21) are respectively disposed on the upper and lower sides of the pedal body (1), and the pedal (20) (21) is coupled to the pedal with respect to one end of the pedal body (1〇) One side wing portion (201) (211) is extended on each side of the main body (10), and the side wing portions (201) (211) are respectively provided with a rotating hole (202) (212), and the rotating hole (202) ( 212) at least one slot (203) (213) is provided in the recess; the rotating hole (202) (212) is adapted to be embedded in a synchronizing gear (22) (23), and the synchronizing gear (22) 23) The side of the corresponding slot (203) (2 13) The protrusion is provided with a pin end (221) (231), so that the synchronizing gear (22) (23) can be locked and fixed in the rotating hole (202) (212); the periphery of the synchronizing gear (22X23) A plurality of rotating teeth (222) (232) are partially disposed at the center, and a gear hole (223) (233) is axially inserted in the center of the synchronous gear (22) (23), and the gear hole (223) (233) is A shaft (24) can be passed through the shaft to be disposed at the shaft hole (12), and the far-synchronous return wheel 7 M294479 (22) (23) is (4) to the setter; further, the wing (10) ( 2U) a rearward thrusting block (204) (214) 'S rotary positioning block (204) (214) is a function of forming a rotational limit with the stop end (13); a clamping group (30), the synchronization positioning group (3〇) is at least on the side of the pedal body (ι) δ and has a positioning frame (31), which is mainly a hollow frame with a rectangular shape, the positioning The top surface and the bottom surface of the inner edge of the frame (31) each include a slip portion (32) (33) and a tooth segment (5) ((6), and the top and bottom tooth segments (34) (35) The inner edge of the positioning frame (31) is provided with a plurality of above (#ι^(341)^τ##(351); (31) The slip section (32) (33) is sleeved at the stop end (13) of the pedal body (39), and the row of teeth (34) (35) is sleeved on the two pedals (20) on the synchronizing gear (22) (23) of (21), and the upper and lower teeth (341) (351) are respectively engaged with the rotating teeth (222) (232), so that the The positioning frame (31) is slidable on the stopping end (13), and can generate a synchronization with the two synchronous gears (22) (23); further, the sliding section of the positioning frame (31) 32) (33) a pair of projections (321) (331) are respectively protruded from the stopper end (13); and relative to the positioning frame (31) • between the other side of the wing portions (201) (211) A bearing sleeve (36) is disposed, and the two ends of the bearing sleeve (36) are respectively sleeved in the rotating holes (202) (212) of the two pedals (20) (21), so that the pedal is turned over smoothly; After clarifying the details of the above creations, the following is a detailed description of the action flow of the creation: As shown in the second and third figures, the creation is on the pedal body (1〇) The lower side is provided with a pedal (20X21), and the pedal (20) (21) is vertical The shaft (n) 2 direction shaft is disposed on the pedal body (10). When the user wants to ride the bicycle, the 8 M294479 can be applied as a pedal (2ϋ) (21), so that the two pedals are 2G) (21) can be closed to each other (as shown in the second figure), at this time the two pedals (10) (21) are horizontal with the shaft ((1) axis direction for the user to Stepping on 'and exerting force to drive the crank to rotate; and when the user wants to fold the collection bicycle 4', then the pedal (20) (21) is rotated and opened (as shown in the third figure), so that two The pedal (20) (21) is perpendicular to the axial direction of the rotating shaft (11), so as to reduce the volume used by the bicycle pedal to facilitate the collector; further, as shown in the fourth figure, The motion locating group (3()) of this creation is shown in the figure, the movement frame (31) the reading section (3)) (3)) the wire is set on the pedal body (the terminal end of the (8) (13), and the drum health frame (8) is slidable back and forth on the miscellaneous end (13); and the spur section (34) (35) is sleeved on the synchronizing gear (22) (23) of the two pedals (20) (21), Wherein, the synchronization of the two pedals (20) (21) The wheel (22) (23) is disposed oppositely; since the thickness of the rotating tooth (222) (232) is approximately equal to one-half of the thickness of the tooth, and only a partial rotation is provided at the periphery of the synchronous gear (22) The teeth (222), so the upper and lower teeth (341) (351) of the positioning frame (μ) are respectively rotated with the rotating teeth (222) (232) of the upper pedal (2〇) and the lower pedal (2) As shown in the figure of the fifth figure, it is a schematic diagram of the state of the synchronous gear (22) of the upper pedal (2〇), wherein the rotating gear (222) of the synchronous gear (22) is associated with the positioning frame ( 31) The upper teeth (341) are old to each other; as shown in the sixth level, when the user pulls the upper pedal (2〇) to rotate to the vertical, the synchronous gear (22) also follows The pedal (2〇) rotates, and the rotating tooth (222) is engaged with the upper molar (341) to drive the positioning frame (31) to slide in the direction of the arrow; as shown in the seventh figure As shown in the figure, it is a schematic diagram of the state of the synchronizing gear (23) of the lower pedal (21), wherein the rotating teeth (232) of the synchronizing gear (23) and the positioning frame (μ) are arranged in the lower teeth (351). 9 M294479 is mutually accommodating; as shown in the "closed surface" when the moneyer pulls the lower pedal (2) to the vertical state, the synchronizing gear (2) also rotates with the pedal (2)), and by the rotating tooth (232) in conjunction with the lower tray (3) 1), the positioning frame (3) is driven to slide in the direction of the arrow; thereby, when the user pulls the upper pedal (20) or the lower pedal (21) At one time, by synchronizing the synchronizing gear (22) (23) with the positioning frame (31), the other pedal (10) (9) can be simultaneously actuated to achieve synchronization of the upper and lower pedals (2〇) (21). The purpose of the action; conversely, when the user pulls one of the pedals (20) (21) to return to the horizontal state, the positioning coffin (31) can also synchronously move the other pedal (2q) (21) synchronously; Or the user can directly push the positioning frame (31) to slide, so as to simultaneously drive the two pedals (2〇) (21) to close each other; the creation is performed by the upper and lower teeth (341) (351) respectively Coupling with the rotating teeth (222) (232), the cymbal (31) can be synchronized by the pedal (2〇χ21) when the positioning frame (31) slides on the blocking end (13) Further, the sliding section (32) (33) of the positioning frame (31) is provided with a bump (321) (331) corresponding to each of the blocking ends (13), and the positioning frame (31) It can be made of plastic material, reinforced fiber material or metal material. It has some slight elastic deformation ability. When the pedal (20) (21) is horizontal or vertical, the bump (321) (331) ) can be abutted against the side of the stop end (13) to create a resistance to prevent the pedal (20) (21) from loosening by itself, and when the user applies a force to move the pedal (20) (21), The positioning frame (31) can be deformed by force, so that the protrusion (321) (331) passes through the blocking end (13), and when the pedal (20) (21) is rotated to the positioning, the positioning frame ( 31) elastically recovering, and the bump (321) (331) is again abutted against the stop end (13); and the rear wing portion (201) (211) is provided with a rotary positioning block at the rear end of the wing portion (201) (211) (204) (214), the rotation positioning block (204) (214) can form a rotation limit with the stop end (13), when the pedal M294479 (20) (21) is closed for the user When the chatter is stepping on the pedal, the direction of the rotation (2〇4) (214) is abutted against the stop end (13) by the force of the foot, and the greater the force of the user stepping on, the more the reaction force generated by the rotation positioning block (204) (214) The large '俾 makes the pedal (2Q) (2i) can withstand a large increase in the force, ensuring that the pedal (20) (21) can have sufficient strength; each set of devices in this creation is symmetrically set, only need to change the synchronous positioning The assembly position of the positioning frame (31), the synchronous gear (22) (23) and the bearing sleeve (36) of the group (3〇) can be used for the pedals on the left and right sides of the bicycle, and does not need to be directed to the left and right feet. Different molds can be opened separately, which can greatly reduce the cost of production. Although the case is illustrated by a preferred embodiment, those skilled in the art can make various changes in the form without departing from the spirit and scope of the case. The above-mentioned implementation side is intended to illustrate the case and is not intended to limit the scope of the case. All kinds of modifications or changes made in the spirit of the case are not the scope of patent application in this case. M294479 / [Simple description of the diagram] The first picture is the three-dimensional exploded view of the creation. The second picture is the three-dimensional combination of the creation. The third picture is the three-dimensional diagram of the state of the collection. The fourth picture is the action of the synchronous positioning group. Schematic (1) The fifth picture is the action diagram of the upper pedal of the creation (1) The sixth picture is the action diagram of the upper pedal of the creation (2) The seventh diagram of the operation of the lower pedal of the creation (1) Diagram of the action of the lower pedal of the creation of this picture (2) The ninth diagram is the action diagram of the synchronous positioning group of this creation (2) [Description of main components] Rotating tooth (222) (232) Gear hole (223) (233) Threading shaft (24) Alignment positioning group (30) Positioning frame (31) Slip section (32) (33) Bump (321) (331) Threading section (34) (35) Upper row of teeth (341) Lower row Teeth (351) Bearing Bushing (36) Pedal Body (10) Shaft (11) Shaft Hole (12) Stop End (13) Pedal (20) (21) Flange (201) (211) Rotating Hole (202) ( 212) Slot (203) (213) Threading positioning block (204) (214) Synchronous gear (22) (23) Pin end (221) (231)