M308225 八、新型說明： 【新型所屬之技術領域】 纟新型是有關於-種限位裝置，特別是指—種自行車 之行進角度限位裝置。 【先前技術】 參閱圖1與圖2,習知一種自行車！包含一車身丨丨、一 前輪12、-手把13、—設於該車身u的後輪^及一轉向 裝置15。該轉向裝置15包含一設於該車身u的頭管單元 151„’_及一連接該手把13與該前輪12並可轉動地設於該頭 吕單元151中的刖叉官單元152。使用者在騎乘該自行車1 時要握住手把13㈣該前叉管單元152與前輪12，而可沿 直行方向呈一夾角B轉向。但在特殊用途（如行動較不便 的人士、腦性麻痒患者、年紀尚小的兒童等）使用時，該 轉向裝置15仍有下述缺失： 一、 使用者在騎乘時，無法將該手把13控制得宜，可 旎會有轉向夾角B過大而失控發生危險的機會，導致有安 全性較低的缺失。 二、 若該自行車1為復健用途，必要時需沿事先定好 的固定路線騎乘，將需另外用繩子或鐵絲固定該前叉管單 元152與該頭管單元151，導致有定位不便的缺失。 【新型内容】 因此，本新型之目的，即在提供一種安全性較高，而 且疋位方便的自行車之行進角度限位裝置。 於是，本新型自行車之行進角度限位裝置裝設於一自 M308225 f車，該自行車具有—車身、-前輪、-手把，及-設於 /車身的後輪。$自行車之行進角度限位裝置包含一設於 該車身反向該後輪-端的頭管單元、一可繞一旋轉軸線旋 轉並連接該手把與該前輪的前叉管單元，及一固定件。 該頭管單元包括-頭管’及一自該頭管的一外周面沿 徑=外延伸的固定塊，該固定塊具有吸定槽孔。該前 叉管單元包括一可繞該旋轉軸線旋轉的前又管，及一自該 前又管的一外周面沿徑向朝外延伸的旋轉塊。該前又管穿 設於諒頭管中，該旋轉塊具有一旋轉槽孔，該固定槽孔與 該旋轉槽孔皆位於以該旋轉軸線為軸線所界定出的一第一 假想狐面上。該时件可移除地穿設於該固定槽孔與該旋 轉槽孔至少其中之-。該固定件與該固定、旋轉槽孔間的 配合，可限制該前又管單元的旋轉角度，進而限制該自行 車的行進角度。 【實施方式】 有關本新型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六個較佳實施例的詳.細說明中，將可 清楚的呈現。 在本新型被詳細描述之前，要注意的是，在以下的說 明内容中’類似的元件是以相同的編號來表示。 參閱圖3 ’本新型自行車之行進角度限位裝置之第一較 佳實施例裝設於一自行車2，該自行車2具有一車身21、 一前輪22、一手把23，及一設於該車身21的後輪24。 該自行車之行進角度限位裝置包含一設於該車身21反 :：；： ：2 ;; M308225 其 > 閱圖4 ’該頭管單元3包括一頭管3卜及一自該頭 & 1的夕卜周面沿徑向朝外延伸的固定塊32，該固定塊 Μ具有一固定射L 321，及一間隔該固定槽孔321的固定 定位穿孔322。M308225 VIII. New description: [New technical field] 纟New type is related to the type of limit device, especially the travel angle limit device of the bicycle. [Prior Art] Referring to Figures 1 and 2, a bicycle is known! It includes a body cymbal, a front wheel 12, a handlebar 13, a rear wheel disposed on the body u, and a steering device 15. The steering device 15 includes a head pipe unit 151 „'_ disposed on the vehicle body u and a shackle unit 152 that is coupled to the handlebar 13 and the front wheel 12 and rotatably disposed in the hood unit 151. When riding the bicycle 1, the hand grip 13 (four) the front fork tube unit 152 and the front wheel 12 are held, and can be turned at an angle B in the straight direction. However, for special purposes (such as people with less mobility, brain numbness) When the patient is itchy, the child is still young, the steering device 15 still has the following defects: 1. When the user is riding, the handle 13 cannot be properly controlled, and the steering angle B is too large. The risk of losing control and causing danger leads to a lack of safety. 2. If the bicycle 1 is for rehabilitation purposes, it must be routed along a fixed route if necessary, and the front fork tube will be fixed with a rope or wire. The unit 152 and the head tube unit 151 cause a lack of positioning inconvenience. [New content] Therefore, the object of the present invention is to provide a traveling angle limiting device for a bicycle with high safety and convenient positioning. , this new The bicycle travel angle limit device is installed in a M308225 f car, which has a body, a front wheel, a handle, and a rear wheel disposed on the body. The bicycle travel angle limit device includes a set. The head tube unit of the rear wheel end is reversed from the body, a front fork tube unit rotatable about an axis of rotation and connecting the handle and the front wheel, and a fixing member. The head tube unit includes a head tube and a fixing block extending from the outer peripheral surface of the head pipe along the outer diameter, the fixing block has a suction slot. The front fork tube unit includes a front tube that is rotatable about the rotation axis, and a front tube a rotating block extending outward in the radial direction of the outer peripheral surface of the tube. The front tube is disposed in the forehead tube, the rotating block has a rotating slot, and the fixing slot is located with the rotating slot The rotation axis is a first imaginary fox surface defined by the axis. The piece is removably disposed at least between the fixing slot and the rotating slot. The fixing member and the fixing and rotating slot The cooperation between the two can limit the rotation angle of the front tube unit, and further limit The above-mentioned and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments of the present invention. Before the present invention is described in detail, it is to be noted that in the following description, 'similar elements are denoted by the same reference numerals. Referring to FIG. 3 'The first preferred embodiment of the traveling angle limiting device of the present bicycle The bicycle is mounted on a bicycle 2 having a body 21, a front wheel 22, a handle 23, and a rear wheel 24 disposed on the body 21. The bicycle angle-restricting device includes a body disposed on the body. 21 反::;: :2 ;; M308225 It> Read Figure 4 'The head tube unit 3 includes a head tube 3 and a fixed block extending radially outward from the circumference of the head & 32. The fixing block has a fixed projection L 321, and a fixed positioning through hole 322 spaced apart from the fixing slot 321 .
該則叉吕單凡4包括一前叉管4卜及一自該前叉管41 的一外周面沿徑向朝外延伸的旋轉塊42。該固定塊32與該 疑轉塊42皆形成扁形板狀，該旋轉塊42具有一旋轉槽孔 及一個間隔該旋轉槽孔421的旋轉定位穿孔422，該 方疋轉槽孔421具有—第一端423及-第二端424。 〜參_ 4與圖5’該前叉管41可繞該旋轉軸線γ旋轉 牙又於碩g 31中，定義以該旋轉軸線γ為轴線所界定出 、第假心弧面Α1，及一第二假想弧面Α2。該旋轉槽孔 421是呈沿該第一假想弧面A1延伸的弧形槽孔狀，該第一 、二端423、424位於該第—假想孤面A1方向上，該固定 槽孔321是呈圓形穿孔狀並位於該第一、二端切、似間 ，該等旋轉定位穿孔422與該固定定位穿孔322皆沿該第 二假想弧面A2設置。 參閱圖6’該固定件5為—f知的插銷元件，非關本新 型的重點，在此不再詳述其構造及作用。 參閱圖3、圖5、圖7,使用者可將該固定件$穿設於 該固定槽孔321中，該旋轉槽孔421的第一、二端423、 M3 08225 424可隨該前叉管單元4 叉管單元4旋轉特定角度 度。 旋轉而抵觸該固定件5以限定該前 C’進而限制該自行車2的行進角 參閱圖3與圖8 *使用去可' 膝λλ. m ^ /j. ,,,?1 , _#了㈣Mb W該SJ定槽 幻，而插設於該固定定位穿孔322 + 旋轉定位穿孔422其_之… h於該專 留-。 刖又g早兀4可與該頭管 早凡3固定使該自行車2呈吉綠兮 ㈣商^…，+ ^進（如圖8料）、也可 ^亥頭特定使該自行車2持續向左行進 (=圖9所示），或是反向夾特Mg使該自行車2持續 向右行進（如圖10所示）。 在特殊用途（如行動較不便的人士、腦性麻痺患者、 年紀尚小的兒童等）使用時，本新型自行車之行進角度限 位裝置不但可以轉向，還更具有以下功效： 一、該固定件5設於該等固定槽孔321中時，限制了 該前又管單元4的轉向角度，即使使用者騎乘時無法將該 手把23控制得宜時’騎乘仍不會發生轉向角度過大的問題 ，因而達到安全性較高的功效。 一、右有使用者為了復健用途而需要沿事先定好的固 定路線騎乘，只需將該固定件5穿設在所需的固^、旋轉 疋位牙孔322、422中，即可固定該前叉管單元4與該頭管 單元3轉向於特定角度c,因此有定位方便的功效。 參閱圖11 ’本新型自行車之行進角度限位裝置之第二 較佳實施例大致與該第一較佳實施例相同，其不同之處在 於该固定、旋轉槽孔322、422皆呈圓形穿孔狀，該旋轉槽 M3 08225 孔422的孔徑大於該固定槽孔32卜並具有位於該第一假想 弧面A1方向上的—第一端423及-第二端424。該固定件 ^穿設於該固定槽孔321，該第一、二端心似可隨該 前叉管單元4旋轉而抵觸該固定件5㈣定該前又管單元4 旋轉特定角度C，藉此同樣可達到該第_較佳實施例所述的 功效。 參閱圖12,本新型自行車之行進角度限位裝置之第三 較佳實施例大致與該第一較佳實施例相同，其不同之處在 於該固定塊32具有―固定槽孔32卜及三間隔定槽孔 321的固定定位穿孔322，該固定槽孔32丨具有一第一端 3及第一编324。該旋轉塊42具有一旋轉槽孔421，及 一個間隔該旋棒槽孔421的旋轉定位穿孔422。 該固定槽孔321是呈沿該第一假想弧面A1延伸的孤形 槽孔狀，且該固定槽孔321的第一端323及第二端以位 於該第-假想弧面A1方向上。該旋轉槽孔421是呈圓形穿 孔狀並位於4第—、二端323、324間，該固定件$穿設於 該旋轉槽孔42i，並可隨該前叉管單元4旋轉而抵觸該第一 一一端323、324以限定該前叉管單元4旋轉特定角度c。 該等旋轉定位穿孔422與該固定定位穿孔322皆沿以該第 -饭想藏面A2設置，該固^件5也可穿設於該等旋轉定位 穿孔422與該固定定位穿孔322中，以固定該前叉管單元* 於特疋角纟c。此外，此較佳實施例中的該固定槽孔321形 狀右改為孔徑大於該旋轉槽孔421的圓形穿孔狀（圖未示） ，同樣也可達到該第一較佳實施例所述的功效。 M308225 簽閱圖13，本新型自行車之行進角度限位裝置之第四 較佳實施例大致與該第一較佳實施例相同，其不同之處在 於該固定塊32具有一固定槽孔321，該旋轉塊42具有一旋 轉穿槽421，及二個間隔該旋轉槽孔421設置的旋轉定位穿 孔422。該固定槽孔321、旋轉槽孔421與該等旋轉定位穿 孔422徑寬實質上相等大小，並皆沿該第一假想弧面ai設 置。該固定件5穿設於該固定槽孔321巾，並同時穿設於 該旋轉槽孔421與該等旋轉定位穿孔422其中之一，以固 定該前叉管|元4於特定角纟c，同樣可達到該第一較佳實 施例所述定位方便的功效。 參閱圖14,本新型自行車之行進角度限位裝置之第五 較佳實施例大致與該第一較佳實施例相同，其不同之處在 於該旋轉塊42具有一旋轉槽孔421，該固定塊32具有一固 定槽孔321及二個間隔該固定槽孔321設置的固定定位穿 孔322。該固定槽孔321、旋轉槽孔招與該等固定定位穿 孔322 &寬實貝上相等大小，並皆沿該第一假想娘面設 置，該固定件5穿設於該旋轉槽孔421中，並同時穿設於 該固定槽孔321與該等固定定位穿孔322其中之一，以固 定該前叉管單元4於特定角度C，同樣可達到該第—較佳實 施例所述定位方便的功效。 參閱圖15’.本新型自行車之行進角度限位裝置之第六 較佳實施例大致於該第-較佳實施例相同，其不同之處在 於該頭管單元3的固定塊32與該前又管單元4的旋轉塊42 不呈扁形板狀，而呈現整體厚度較大的形狀。 10 M308225 參閱圖16與圖17，該固定塊32具有一連接該固定塊 32 —頂、底面的一外周面325與一内周面326、一形成於 該外周面325並沿徑向朝内延伸至該内周φ似的卡制槽 327,及一由該内周面326所界定出的固定槽孔321，該卡 制槽327連通該固定槽孔32 j。 該旋轉塊42具有一旋轉槽孔421，該旋轉槽孔421是 形成於該旋轉塊42的—頂面朝下延伸至—底面，該旋轉槽 孔421具有一鄰近該旋轉塊42頂面的弧形槽部425，及多 數個鄰近該旋轉塊42纟面的定位孔部倒，該孤形槽部 425沿該第-假想弧面A1方向延伸，並具有位於該第一假 想弧面Ai方向上的—第一端427及—第二端428，該等定 位孔部426自該弧形槽部425底端朝下延伸至該旋轉塊42 的底面，並相互間隔地沿該第一假想弧面A1等角度分布， 且與«定槽孔321徑寬實f上相等大小。該固㈣孔321 與該旋轉槽孔421皆位於該第—假想狐面A1上。 曰該固定件5穿設於該固定槽孔321，該固定件5具有一 桿身51、-設於該桿身51的拉環52，及—間隔該拉環π 设於該桿身51的卡制頭53。 #參閱圖16與圖18，該固定件5可相對該頭管單元3在 第位置與一第二位置間定位。當該固定件5位於該第 置日寸該固疋件5 —底端位於該旋轉槽孔421的弧形 曰Ρ 425 1¾卡制頭53恆彈伸於該卡制槽π中。該第一 端427 428可隨該前又管單元4旋轉而抵觸該固定件 5以限定該前叉管單元4旋轉特定角度c。 11 M308225 士參閱圖17與圖18，當該固定件5位於該第二位置時， 射制碩53恆彈伸於該固定塊32下方，該拉環 住 ^ 的頂面，該固定件$的底端穿設於該等定位孔部 426其中之一，以固定該前叉管單元4於特定角度C，如此 同樣可達到該第一較佳實施例所述的功效。 &准以上所述者，僅為本新型之較佳實施例而已，當不 f以此限定本新型實施之範圍，即大凡依本新型申請專利 範圍及新型說明内容所作之簡單的等效變化與修飾，皆仍 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1疋一側視圖，說明習知一自行車； 圖2疋一俯視局部剖視圖，說明該自行車的一轉向裝 置， 圖3是一側視圖，說明本新型自行車之行進角度限位 裝置的一第一較佳實施例裝設於該自行車之情形； 圖4是該第一較佳實施例的一立體圖，說明一前又管 單元穿設於一頭管單元中； 圖5是該第一較佳實施例的一俯視剖視圖，說明一旋 轉槽孔的一第一端抵觸一固定件； 圖6是該第一較佳實施例的一側視圖，說明該固定件 9 圖7是一類似圖5的視圖，說明該旋轉槽孔的一第二 端抵觸該固定件； 圖8是一類似圖7的視圖，說明該固定件穿設於一固 12 M308225 定定位穿孔中，使該自行車能直線前進； 圖9是一類似圖8的視圖，說明該固定件穿設於另一 個固定定位穿孔中，使該自行車能持續向左前進； 圖10是一類似圖9的視圖，說明該固定件穿設於另一 個固定定位穿孔中，使該自行車能持續向右前進； 圖11是一俯視剖視圖，說明本新型自行車之行進角度 限位裝置的一第二較佳實施例； 圖12是一俯視剖視圖，說明本新型自行車之行進角度 限位裝置的一第三較佳實施例； 圖13疋一俯視剖視圖，說明本新型自行車之行進角度 限位裝置的一第四較佳實施例； 圖14疋一俯視剖視圖，說明本新型自行車之行進角度 限位裝置的一第五較佳實施例； 圖15是一側視圖，說明本新型自行車之行進角度限位 裝置的一第六較佳實施例； 圖16是4第六較佳實施例的一前視局部剖視圖，說明 一固定件位於一第一位置； 圖17是該第六較佳實施例的一側視圖，說明一第一假 想弧面；及 圖18是一類似圖16的視圖，說明該固定件位於一第 二位置。 13 M308225 【主要元件符號說明】 2 ·····••…自行車 21………車身 22......…前輪 23·········手把 24·........後輪 3………頭管單元 31……··頭管 32.......••固定塊 321 •…···固定槽孔 322…····固定定位穿孔 323……·第一端 324 .......第二端 325 .......外周面 326 .......内周面 327 .......卡制槽 4 .····•…·前叉管單元 41………前叉管 42.........旋轉塊 421 .......旋轉槽孔 422 .......旋轉定位穿孔 423 .......第一端 424 .......第二端 425 .......弧形槽部 426 .......定位孔部 427 ·······第一端 428……•第二端 5........固定件 51·…··…桿身 52 .........拉環 53 .........卡制頭 A1......第一假想弧面 A2........第二假想弧面 C………特定角度 Y..........旋轉軸線 14The fork Ludan Fan 4 includes a front fork tube 4b and a rotating block 42 extending radially outward from an outer peripheral surface of the front fork tube 41. The fixing block 32 and the suspecting block 42 are both formed into a flat plate shape, and the rotating block 42 has a rotating slot and a rotary positioning through hole 422 spaced apart from the rotating slot 421. The square rotating slot 421 has a first End 423 and - second end 424. ～4 and FIG. 5′ The front fork tube 41 is rotatable about the axis of rotation γ and is also in the master 31, defining the axis of rotation γ as the axis, the first pseudo-arc surface Α1, and one The second imaginary arc is Α2. The rotating slot 421 is in the shape of an arc-shaped slot extending along the first imaginary arc surface A1. The first and second ends 423 and 424 are located in the direction of the first imaginary orphan plane A1, and the fixing slot 321 is The circular perforated shape is located at the first and second end cuts, and the fixed positioning through holes 422 and the fixed positioning through holes 322 are both disposed along the second imaginary curved surface A2. Referring to Fig. 6', the fixing member 5 is a latching member, which is not the key to the new type, and its construction and function will not be described in detail herein. Referring to FIG. 3, FIG. 5, and FIG. 7, the user can insert the fixing member $ into the fixing slot 321, and the first and second ends 423 and M3 08225 424 of the rotating slot 421 can follow the front fork tube. Unit 4 The fork tube unit 4 is rotated by a certain degree of angle. Rotating against the fixing member 5 to define the front C' and thereby restricting the traveling angle of the bicycle 2. Referring to FIG. 3 and FIG. 8 * Using the knuckle λ λ λ. m ^ /j. ,,, ?1, _# (4) Mb W. The SJ is fixed in the slot, and is inserted in the fixed positioning through hole 322 + the rotary positioning through hole 422.刖又g early 兀4 can be fixed with the head tube 3, so that the bicycle 2 is a green 兮 (4) quotient ^..., + ^ into (as shown in Figure 8), can also ^ Haitou specific to make the bicycle 2 continue to Left travel (= shown in Figure 9), or reverse clip Mg, causes the bicycle 2 to continue to the right (as shown in Figure 10). When used for special purposes (such as people with less mobility, cerebral palsy patients, young children, etc.), the travel angle limit device of the new bicycle can not only be steered, but also has the following effects: 1. The fixing member When the fixing hole 321 is disposed in the fixing slot 321 , the steering angle of the front tube unit 4 is limited, and even if the handle 23 cannot be properly controlled when the user rides, the riding angle does not occur excessively. The problem, thus achieving a higher security effect. 1. The right user needs to ride along a predetermined fixed route for rehabilitation purposes, and the fixing member 5 can be fixed only in the required fixing and rotating clamping holes 322 and 422. The front fork tube unit 4 and the head tube unit 3 are turned to a specific angle c, so that the positioning is convenient. Referring to FIG. 11 , the second preferred embodiment of the traveling angle limiting device of the bicycle is substantially the same as the first preferred embodiment, except that the fixing and rotating slots 322 and 422 are circularly perforated. The hole 422 has a larger aperture than the fixed slot 32 and has a first end 423 and a second end 424 in the direction of the first imaginary arc surface A1. The fixing member is disposed in the fixing slot 321 , and the first and second ends are similar to the rotation of the front fork tube unit 4 to interfere with the fixing member 5 ( 4 ), and the tube unit 4 is rotated by a specific angle C. The efficacy described in the first preferred embodiment can also be achieved. Referring to FIG. 12, a third preferred embodiment of the traveling angle limiting device of the bicycle is substantially the same as the first preferred embodiment, except that the fixing block 32 has a "fixing slot 32" and a three-interval. The fixed slot 321 is fixedly positioned with a through hole 322 having a first end 3 and a first braid 324. The rotary block 42 has a rotary slot 421 and a rotationally located through hole 422 spaced apart from the rotary slot 421. The fixing slot 321 is in the shape of a solitary slot extending along the first imaginary arc surface A1, and the first end 323 and the second end of the fixing slot 321 are located in the direction of the first-imaginary arc surface A1. The rotating slot 421 is in the shape of a circular through hole and is located between the four first and second ends 323 and 324. The fixing member is disposed in the rotating slot 42i and can interfere with the rotation of the front fork unit 4. The first end 323, 324 defines the front fork tube unit 4 to rotate a particular angle c. The rotating positioning through holes 422 and the fixed positioning through holes 322 are both disposed along the first imaginary hiding surface A2, and the fixing member 5 can also be disposed in the rotating positioning through holes 422 and the fixed positioning through holes 322. Fix the front fork tube unit* at the corner 纟c. In addition, the shape of the fixing slot 321 in the preferred embodiment is changed to a circular perforation (not shown) having a larger aperture than the rotating slot 421, and the same as described in the first preferred embodiment. efficacy. M308225 is shown in FIG. 13. The fourth preferred embodiment of the traveling angle limiting device of the bicycle is substantially the same as the first preferred embodiment, except that the fixing block 32 has a fixing slot 321 . The rotating block 42 has a rotating through slot 421 and two rotational positioning through holes 422 spaced apart from the rotating slot 421. The fixing slot 321 and the rotating slot 421 are substantially equal in size to the rotational positioning through holes 422, and are disposed along the first imaginary arc surface ai. The fixing member 5 is disposed in the fixing slot 321 and is disposed at one of the rotating slot 421 and the rotating positioning through holes 422 to fix the front fork tube 4 at a specific angle 纟c. The convenience of positioning as described in the first preferred embodiment can also be achieved. Referring to FIG. 14, the fifth preferred embodiment of the traveling angle limiting device of the bicycle is substantially the same as the first preferred embodiment, except that the rotating block 42 has a rotating slot 421, and the fixing block has a rotating block 421. 32 has a fixing slot 321 and two fixed positioning through holes 322 spaced apart from the fixing slot 321 . The fixing slot 321 and the rotating slot are sized to be equal to the fixed plenums 322 & and are disposed along the first imaginary side. The fixing member 5 is disposed in the rotating slot 421. And at the same time, one of the fixing slot holes 321 and the fixed positioning holes 322 are fixed to fix the front fork tube unit 4 at a specific angle C, and the positioning according to the first preferred embodiment is also convenient. efficacy. Referring to FIG. 15', a sixth preferred embodiment of the traveling angle limiting device of the bicycle of the present invention is substantially the same as the first preferred embodiment, except that the fixing block 32 of the head pipe unit 3 and the front portion are The rotating block 42 of the tube unit 4 does not have a flat plate shape but exhibits a shape having a large overall thickness. 10 M308225 Referring to FIG. 16 and FIG. 17, the fixing block 32 has an outer peripheral surface 325 and an inner peripheral surface 326 which are connected to the top and bottom surfaces of the fixing block 32, and is formed on the outer peripheral surface 325 and extends radially inward. A locking groove 327 to the inner circumference φ, and a fixing slot 321 defined by the inner circumferential surface 326, the clamping groove 327 communicates with the fixing slot 32 j. The rotating block 42 has a rotating slot 421 formed on the top surface of the rotating block 42 extending downward to the bottom surface. The rotating slot 421 has an arc adjacent to the top surface of the rotating block 42. a groove portion 425, and a plurality of positioning hole portions adjacent to the face of the rotating block 42. The orphan groove portion 425 extends in the direction of the first-imaginary arc surface A1 and has a direction of the first virtual arc surface Ai. The first end 427 and the second end 428 extend from the bottom end of the arcuate groove portion 425 to the bottom surface of the rotating block 42 and are spaced apart from each other along the first imaginary curved surface. A1 is equiangularly distributed, and is equal in size to the «slot hole 321 diameter and width f. The solid (four) hole 321 and the rotating slot 421 are both located on the first imaginary fox face A1. The fixing member 5 is disposed in the fixing slot 321 . The fixing member 5 has a shaft 51 , a pull ring 52 disposed on the shaft 51 , and a spacer π disposed on the shaft 51 . The clamping head 53. Referring to Figures 16 and 18, the fixture 5 is positionable relative to the head tube unit 3 between a first position and a second position. When the fixing member 5 is located at the first day of the fixing member 5, the bottom end of the fixing member 5 is located at the curved portion 421 of the rotating slot 421, and the clamping head 53 is constantly ejected in the locking groove π. The first end 427 428 can rotate against the fastener 5 as the front tube unit 4 rotates to define the front fork tube unit 4 to rotate by a particular angle c. 11 M308225, referring to FIG. 17 and FIG. 18, when the fixing member 5 is located at the second position, the projecting protrusion 53 is extended below the fixing block 32, and the pulling ring is mounted on the top surface of the fixing member. The bottom end is disposed in one of the positioning holes 426 to fix the front fork tube unit 4 at a specific angle C, so that the effect described in the first preferred embodiment can also be achieved. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent change made according to the scope of the new patent application and the new description. And modifications are still within the scope of this new patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a conventional bicycle; FIG. 2 is a partial cross-sectional view showing a steering device of the bicycle, and FIG. 3 is a side view showing the traveling angle limit of the bicycle. A first preferred embodiment of the device is mounted on the bicycle; FIG. 4 is a perspective view of the first preferred embodiment, illustrating a front tube unit being threaded into a tube unit; FIG. A top cross-sectional view of the first preferred embodiment illustrates a first end of a rotating slot against a fixing member. FIG. 6 is a side view of the first preferred embodiment, illustrating the fixing member 9 and FIG. Similar to the view of FIG. 5, a second end of the rotating slot is in contact with the fixing member; FIG. 8 is a view similar to FIG. 7, illustrating that the fixing member is disposed in a fixed 12 M308225 positioning perforation to make the bicycle Figure 9 is a view similar to Figure 8 illustrating the attachment member being threaded into another fixed positioning perforation to enable the bicycle to continue to the left; Figure 10 is a view similar to Figure 9 illustrating the fixation One piece is worn in another The fixed positioning perforation enables the bicycle to continue to the right; FIG. 11 is a top cross-sectional view showing a second preferred embodiment of the traveling angle limiting device of the bicycle; FIG. 12 is a top cross-sectional view showing the new type A third preferred embodiment of the bicycle travel angle limiting device; FIG. 13 is a top cross-sectional view showing a fourth preferred embodiment of the traveling angle limiting device of the bicycle; FIG. 14 is a top cross-sectional view illustrating A fifth preferred embodiment of the traveling angle limiting device of the bicycle of the present invention; FIG. 15 is a side view showing a sixth preferred embodiment of the traveling angle limiting device of the bicycle; FIG. A front partial cross-sectional view of a preferred embodiment illustrating a mounting member in a first position; FIG. 17 is a side elevational view of the sixth preferred embodiment illustrating a first imaginary curved surface; and FIG. 18 is similar Figure 16 is a view showing the fixing member in a second position. 13 M308225 [Description of main component symbols] 2 ·····••...Bicycle 21.........Body 22.........front wheel 23············································ .... Rear wheel 3......... Head tube unit 31...··Head tube 32.......••Fixed block 321 •...···Fixed slot 322...····Fixed positioning perforation 323 ...·first end 324 .... second end 325 .... outer peripheral surface 326 ....... inner peripheral surface 327 ....... card slot 4 .····•...·Front fork tube unit 41.........Front fork tube 42....Rotary block 421.......Rotating slot 422... Rotating positioning perforation 423 . . . first end 424 . . . second end 425 . . . arcuate groove portion 426 . . . positioning hole portion 427 ·······The first end 428......•The second end 5........Fixed parts 51·...··... shaft 52 ......... pull ring 53 . ........The card head A1...the first imaginary arc surface A2........the second imaginary arc surface C.........the specific angle Y... .... rotation axis 14