五、新型說明: 【新型所屬之技術領域】 本創作係與健身車有關,更詳而言之係指一種健身車 之剎車調整機構及磁阻裝置。 【先前技術】 按’ 一般之健身車主要係利用踏動一阻力輪旋轉來達 鲁-列健身之效果。 然而’上述健身車之阻力輪必須藉由一阻力單元來產 生阻力’而目前之阻力單元目前有二種变態,—種為接觸 型阻力單元,另一種則為磁阻型阻力單元,其中接觸型阻 力單元’主要係利用與阻力輪接觸之力量大小來改變調整 阻力輪之阻力’當然亦同時利用接觸來達到剎車之效果, 但由於接觸型之阻力單元容易產生磨損,而有必須時常更 換新品之額外費用支出情形,因此較不受一般人之喜愛。 歉磁阻型阻力單元則係利用磁力來產生與阻力輪間之吸力, 以提供使用者踩踏上之阻力,一般磁阻型阻力單元主要係 由一調整機構及一磁阻裝置所構成,該磁阻裝置用以產生 磁力’以對阻力輪之旋轉造成阻力,而調整機構則與該磁 =置連結,用以調整磁阻裝置之位置來改變產生阻力之 但’上述之調整機構主要係利用旋轉來推動一螺拴 上、下位移,但由於螺栓之上、下位移行程取決於螺验上 M374886 之單向螺紋,因此每旋轉一圈僅能推動螺栓作一預定之行 程移動,此對調整上而言仍有著不夠快速之問題。 另外,由於上述之磁阻裝置主要係利用於兩金屬片上 設置磁鐵所構成,再將該兩金屬片加以連結,以保持兩金 屬片能位於阻力輪之側邊位置上,但由於兩金屬片容易有 偏斜之情形產生,而造成對阻力輪之磁吸阻力不夠均勻, 產生作用不穩定之情形,而必須時常加以調整,以保持兩 金屬片常保於平行狀態,而有著使用上不夠便利之缺失。 【新型内容】 有鑑於此,本創作之主要目的乃在提供一種健身車之 剎車調整機構及磁阻裝置,使能使剎車調整機構之位移行 程加倍,以達到能快速調整之功效。 本創作之另一主要目的乃在提供一種健身車之剎車調 整機構及磁阻裝置,使能使磁阻裝置對阻力輪產生穩定而 均勻之磁吸阻力。 緣此,本創作乃提供一種健身車之剎車調整機構及磁 阻裝置: 該剎車調整機構包含有: 一外套管,轴向具有一限位孔及一與該限位孔連通之 一滑孔,該限位孔與該滑孔之連接處具有一階部,該外套 管之外側具有一連通至該限位孔之鎖扎; M374886 一彈簧,係置於該外套管之限位孔中’並以一端抵接 於該階部上; 一内套管,係置於該外套管之限位孔中,軸向具有— 貝通之順向螺紋孔’外側面上具有一沿轴向延伸之長溝槽; 一鎖掣件,係由外套管之鎖孔穿入而穿抵於該内套管 之長溝槽中,以限制該内套管之轉動及限制該内套管之轴 向位移行裎; 一接桿,係置於該外套管之滑孔中,一端具有一逆向 螺紋孔’另一端則穿出於該滑孔外與上述健身車之一磁阻 裝置連接; 一控制件,係穿入於該外套管之限位孔中,具有—順 向螺紋段及一逆向螺紋段,該順向螺紋段係螺接於該内套 官之順向螺紋孔中,該逆向螺紋段係螺接於該接桿之逆向 螺紋孔中; 藉此,當該控制件順向旋轉時,該控制件可帶動該接 桿下移一第一段距離,且該接桿可同時相對該控制件下移 —第二段距離’當該控制件逆向旋轉時,該控制件可帶動 該接桿上移-第-段距離,且該接桿可同時相對該控制件 上移一第二段距離; 該磁阻裝置包含有: 一座體,具有一連接部及連接於該連接部上之二翼 部’該二翼部間距有一容置空間’且該二翼部之内側係呈 平行’該二翼部之外側分別具有-容置區域,並於該容置 5 M374886 區域上形成多數貫通至翼部内侧之容置孔,且該容置孔鄰 接該翼部内側之位置處形成有一内擋凸緣; 若干磁鐵,係分別由該座體外側置入於該各容置孔 内,並受該内擋凸緣之擋抵,且該等磁鐵並依序以相反磁 性加以排列; 二擋片,係分別由座體之外側置於該各容置區域中, 以將該等容置孔外側加以封閉。 【實施方式】 為使貴審查委員能對本創作之特徵與特點有更進一 步之了解與認同,茲列舉以下較佳實施例並配合圖式說明 如下: 請參閱第一圖至第七圖,係本創作一較佳實施例所提 供一種健身車之剎車調整機構及磁阻裝置,其中該剎車調 整機構1 0 〇包含有一外套管10、一内套管2〇、一控 制件3 0、一限位件4 0、一彈簧5 〇、一接桿6 〇、一 連、’Ό單元7〇及一鎖掣件8〇,該健身車之磁阻裝置2 〇 0則包含有一座體9 1、若干磁鐵9 2及二擋片9 3其中: 月參閱第一圖至第三圖,該健身車之剎車調整機構1 00 ’其中該外套管1〇為—中空之管體,其由一端轴向 往内延伸有-限位孔丨1,該外套H Q由另—端轴向往 内延伸有-滑孔1 2,該滑孔! 2係與該限位孔丄丄連 L且該孔1 2之孔技小於該限位孔1 1之孔徑,使該 M374886 滑,1 2與該限位孔χ i之連接處形成—階部丄3,該外 套管1 Q之-外側處則開設有—通貫至該限位W丄之鎖 孔1 4。 請參閱第-圖至第三圖,該内套管2〇,具有一轴向 貫穿之順向螺紋孔2 1 ’該内套管2 Q之外側則開設有一 沿轴向延伸之長溝槽2 2。 請參閱第一圖至第三圖,該控制件3 0,具有-握持V. New description: [New technology field] This creation department is related to exercise bikes. More specifically, it refers to the brake adjustment mechanism and magnetoresistive device of an exercise bike. [Prior Art] Press 'General exercise bikes mainly use the rotation of a resistance wheel to achieve the effect of the fitness. However, 'the resistance wheel of the above exercise bike must generate resistance by a resistance unit' and the current resistance unit currently has two metamorphosis, namely, the contact type resistance unit and the other is the reluctance type resistance unit, in which the contact The type of resistance unit 'mainly uses the force of contact with the resistance wheel to change the resistance of the adjustment resistance wheel. Of course, the contact is used to achieve the effect of the brake. However, since the contact type resistance unit is prone to wear, it is necessary to replace the new product from time to time. The extra expense is so much less popular than the average person. The magnetoresistive resistance unit utilizes a magnetic force to generate a suction force with the resistance wheel to provide a resistance for the user to step on. The general reluctance type resistance unit is mainly composed of an adjustment mechanism and a magnetoresistive device. The resisting device is configured to generate a magnetic force to cause resistance to the rotation of the resisting wheel, and the adjusting mechanism is coupled to the magnetic=set to adjust the position of the magnetoresistive device to change the resistance. However, the above-mentioned adjusting mechanism mainly utilizes the rotation. To push the upper and lower displacement of a screw, but because the upper and lower displacement stroke of the bolt depends on the one-way thread of the M374886 on the screw, only one rotation of the bolt can be pushed for a predetermined stroke movement. There are still problems that are not fast enough. In addition, since the above-mentioned magnetoresistive device is mainly composed of a magnet provided on two metal sheets, the two metal sheets are connected to keep the two metal sheets at the side of the resistance wheel, but the two metal sheets are easy. The situation of skewing occurs, and the magnetic resistance to the resistance wheel is not uniform enough, and the action is unstable. It must be adjusted frequently to keep the two metal sheets in a parallel state, and there is a lack of convenience in use. . [New content] In view of this, the main purpose of this creation is to provide a brake adjustment mechanism and a magnetoresistive device for the exercise vehicle, so that the displacement of the brake adjustment mechanism can be doubled to achieve rapid adjustment. Another main purpose of the present invention is to provide a brake adjustment mechanism and a magnetoresistive device for an exercise vehicle that enable the magnetoresistive device to produce a stable and uniform magnetic resistance to the resistance wheel. Therefore, the present invention provides a brake adjustment mechanism and a magnetoresistive device for an exercise vehicle: the brake adjustment mechanism includes: an outer sleeve having a limiting hole in the axial direction and a sliding hole communicating with the limiting hole, The connection between the limiting hole and the sliding hole has a first step, and the outer side of the outer sleeve has a lock connected to the limiting hole; M374886 a spring is placed in the limiting hole of the outer sleeve 'and One end abuts on the step; an inner sleeve is placed in the limiting hole of the outer sleeve, and has an axial groove extending on the outer side of the beveled straight bore hole a locking member is penetrated by the locking hole of the outer sleeve and penetrates into the long groove of the inner sleeve to restrict the rotation of the inner sleeve and limit the axial displacement of the inner sleeve; a connecting rod is disposed in the sliding hole of the outer sleeve, and has a reverse threaded hole at one end. The other end is connected to the magnetoresistive device of the exercise bicycle outside the sliding hole; a control member is inserted through In the limiting hole of the outer sleeve, having a forward thread segment and a reverse thread segment, a forward threaded section is threaded into the forward threaded hole of the inner sleeve, the reverse threaded section being screwed into the reverse threaded hole of the post; thereby, when the control member rotates in the forward direction, the control The member can drive the post down a first distance, and the post can be moved down relative to the control member at the same time - the second distance "when the control member rotates in the reverse direction, the control member can drive the post to move up a first-stage distance, and the post is simultaneously moved up by a second distance from the control member; the magnetoresistive device comprises: a body having a connecting portion and two wings connected to the connecting portion The two wing portions are spaced apart from each other by an accommodating space 'and the inner sides of the two wing portions are parallel'. The outer sides of the two wing portions respectively have an accommodating region, and a plurality of the inner portions of the accommodating portion are formed to penetrate the inner side of the wing portion. a hole is formed in the hole, and an inner flange is formed at a position adjacent to the inner side of the wing portion; a plurality of magnets are respectively inserted into the receiving holes from the outer side of the seat body, and are received by the inner block The flange is resisted, and the magnets are sequentially arranged in opposite magnetic directions. Two flaps, each disposed by the outer line of the seat accommodating the respective regions, and the like to the outside of the receiving hole to be closed. [Embodiment] In order to enable the reviewing committee to have a better understanding and recognition of the features and characteristics of this creation, the following preferred embodiments are listed with the following description: Please refer to the first to seventh figures. A preferred embodiment of the present invention provides a brake adjustment mechanism and a magnetoresistive device for an exercise vehicle, wherein the brake adjustment mechanism 10 includes an outer sleeve 10, an inner sleeve 2, a control member 30, and a limit. The piece 40, a spring 5 〇, a post 6 〇, a link, a 'Ό unit 7 〇 and a lock piece 8 〇, the exercise device magnetoresistive device 2 〇 0 includes a body 9 1 , a number of magnets 9 2 and 2 baffle 9 3 of which: See the first to third figures of the month, the brake adjustment mechanism of the exercise bicycle 100 ′′, wherein the outer sleeve 1〇 is a hollow tube body, which is axially inward from one end The extension has a limit hole 丨1, and the outer sleeve HQ extends inwardly from the other end with a slide hole 1 2, the slide hole! The 2 series is connected to the limiting hole L and the hole of the hole 12 is smaller than the aperture of the limiting hole 11 to make the M374886 slip, and the junction of the 1 and the limiting hole χ i forms a step丄3, the outer side of the outer sleeve 1Q is open-opened to the lock hole 14 of the limit W丄. Referring to the first to third figures, the inner sleeve 2 has an axially extending forward threaded hole 2 1 '. The outer side of the inner sleeve 2 Q defines a long groove 2 2 extending in the axial direction. . Referring to the first to third figures, the control member 30 has a - grip
部3 1及-連接於該握持部3丄上之雙向螺桿3 2,該雙 向螺桿3 2上半段具有一順向螺紋段3 2 1,而下半段則 具有一逆向螺紋段3 2 2,且該順向螺紋段3 2 1之外徑 大於該逆向螺紋段3 2 2之外徑。 請參閱第一圖至第三圖’該限位件4 0,於本實施例 中該限位件40為由若干之螺帽4丄及墊片4 2所構成。 請參閱第一圖至第三圖,該彈簧50為-壓縮彈簧。 請參閱第-圖至第三圖,該接桿6◦上半段具有一逆 。螺紋孔6 1 ’而下半段則—體連接有—螺桿6 2。 、請參閱第—圖至第三圖,該連結單元7G,具有-第 —連結部γ1及一第二連結部7 2。 請參閱第一圖至第三圖,該鎖掣件8 0,為-螺栓。 請參閱第四圖至第五圖,賴身車之磁阻裝置2〇 其中該座體9 1係由絕緣材質所一體製成,具有一連 j9 1 1及二翼部9 1 2,該連接部9 1 1-端開設有 汽向之穿孔9 1 3 ’而中段位置則開設有一縱向之穿槽 7 M374886 9 1 5,並於該連接部9 1 1之兩側分別開設有一連通該 穿槽9 1 5之通孔9 1 7,該二翼部9 1 2係平行地連接 於該連接部9 1 1上,且該兩翼部g i 2内側間距有一預 定之容置空間9 1 4,該兩翼部9 1 2外側上則分別開設 有一容置區域916,並於該兩翼部912之容置區域9 1 6上分別開設有貫穿内、外側之三個容置孔g 1 8 ,且 該各容置孔9 1 8鄰近該容置空間9 χ 4之位置並形成有 一内擋凸緣9 1 9。 請參閱第四圖至第五圖,該等磁鐵9 2,係分別由該 座體9 1外側置入於該各容置孔9丄6内,並受該内擋凸 緣9 1 9之擋抵而不會.由内側掉出,且該等磁鐵9 2並依 序以相反磁性加以排列,即排列成正、負、正或負、正、 負對排列方式。 請參閱第四圖至第五圖,該等擋片9 3,係由金屬材 貝所製成,係分別由座體9 1之兩外側加以置於該容置區 域9 1 6中,以將該等容置孔9丄8外側加以封閉。 疋以,上述即為本創作所提供一較佳實施例健身車之 剎車調整機構及磁阻裝置的各部構件介紹,接著再將本創 作之組裝方式及使用特點介紹如下: 首先,該健身車之剎車調整機構i 〇 〇,如第三及第 六、七圖,係先將該彈簧5 0置入於該外套管丄〇之限位 孔1 1,並以一端抵接於該階部1 3上,再將該控制件3 0雙向螺桿3 2之軸敎段3 2 1難於劾套管2 〇 M374886 •之順向螺紋孔21中,使該内套管2 0位於該雙向螺桿3 - 2之上半段,再將該限位件4 〇義於該控制件3 〇之雔 向螺桿32中段位置處,並將該控制件3〇之雙向螺桿^ 2連同該内套管2〇-併置人於該外套管1〇之限位孔工 1中,並由該限位件4 〇抵μ於該彈簧5 Q之另—端,而 該鎖科8 0則由該外套管! 〇之鎖孔工4鎖入而穿入於 該内套官2 0之長溝槽2 2内,該接桿6 〇則穿入於該外 春套管ίο之滑孔12中,並由該逆向螺紋孔61供該控制 ^30雙向螺桿32之逆向螺紋段322螺接,再將該接 杯6 0之螺桿6 2與連結單元7〇之第一連結部7工加以 連接,而該連結單元7〇之第二連結部72則穿入於該磁 阻裝置9 0之座體9 1穿槽9 1 5内’並由該通孔9 ! 7 供—樞軸9 9穿入進行樞接,以將該調整機構i 〇 〇與磁 阻褒置20 0加以樞接。當然,該調整機構工〇〇之外套 •管1 0係固定於-健身車之支架9 8上,而該磁阻裝置2 〇 0之座體9 1亦同時由連接部9丄工之穿孔9工3樞接 於該支架9 8上。 當欲調整該雖裝置2 Q Q對健身車之一阻力輪9 7 所產生之阻力時’則可旋轉該調整機構工〇 〇之控制件^ 〇 ’,當該控制件3 〇順向旋轉時,由於該内套管2 〇受該 鎖I件8 0之作用’而無法旋轉,因此該控制件3 〇之順 向螺紋2 1便與該内套管2 〇之順向螺紋孔3 2工產 生作用’而使該控制件3 Q往下位移—預定之第一段距 9 M374886 離,使此時該接桿6 0亦同步地隨著該控制件3 0下移, 且此一同時該控制件3 0之逆向螺紋段3 2 2亦與該接桿 6 0之逆向螺紋孔6 1產生作用,而使該接桿6 0作一相 對該控制件3 0之往下位移一第二段距離,藉以連動該磁 阻裝置2 0 0樞擺而改變對阻力輪9 7所產生之磁吸阻 力;當然,當控制件3 0逆向旋轉時,該控制件3 0之順 向螺紋段3 2 1便與該内套管2 0之順向螺紋孔3 2 1產 生作用,而使該控制件3 0往上位移一第二段距離,使此 時該接桿6 0亦同步地隨著該控制件3 0上移,且此一同 時該控制件3 0之逆向螺紋段3 2 2亦與該接桿6 0之逆 向螺紋孔6 1產生作用,而使該接桿6 0作一相對該控制 件3 0之往上位移一第二段距離。如此一來,無論該控制 件3 0順向旋轉或逆向旋轉,皆能以雙倍之行程帶動該接 桿6 0及該磁阻裝置2 0 0進行位移,以達到快速調整之 目的功效。當欲進行緊急剎車時,則直接將控制件3 0進 行壓抵,即可直接帶動該接桿6 0與磁阻裝置2 0 0位 移,以進行緊急剎車,並由該鎖掣件8 0限制該内套管2 0之軸向位移行程。 另外,由於該磁阻裝置2 0 0之座體9 1係為一體製 成,因此該兩翼部9 1 2之平行間距能夠維持不變,以保 持對阻力輪9 7產生均勻之磁吸阻力。況且,由於能藉由 該擋片9 3與該等磁鐵9 2間產生相互磁吸之連鎖效應, 使磁吸阻力之效率更佳。 M374886 以上所揭,僅為本創作的較佳實施方式而已,並非用 以限定本創作實施例的範圍,本技術領域内的一般技術人 員根據本創作所作的均等變化,以及本領域内技術人員熟 知的改變,仍應屬本創作涵蓋的範圍。 M374886 【圖式簡單說明】 第一圖係本創作一較佳實施例之立體分解圖。 第二圖係第—圖所示實施例之立體組合圖。 第三圖係第一圖所示實施例之組合剖視圖。 第四圖係本創作—較佳實施例之讀分解圖。 第五圖係第—圖所示實施例之立體組合圖。 第六圖係本創作—較佳實施例之作動示意圖。 第七圖係本創作—較佳實施例之作動示意圖。 【主要元件符號說明】 健身車之剎車調整機構1 〇 〇 外套管1 0 滑孔1 2 鎖孔1 4 順向螺紋孔2 1 控制件3 0 雙向螺桿3 2 逆向螺紋段3 2 2 螺帽4 1 彈簧5 〇 逆向螺紋孔61 連結單元7 0 限位孔1 1 階部1 3 内套管2 0 長溝槽2 2 握持部3 1 順向螺紋段3 2 1 限位件4 0 墊片4 2 接桿6 0 螺桿6 2 第一連結部7 1 12 M374886 第二連結部72 鎖掣件80 健身車之磁阻裝置2 0 0 座體9 1 穿孔9 1 3 通孔9 1 7 容置空間9 1 4 容置孔918 磁鐵9 2 樞轴9 9 阻力輪9 7 連接部9 1 1 穿槽9 1 5 翼部9 1 2 容置區域916 内擋凸緣9 1 9 擋片9 3 支架9 8 13a portion 3 1 and a bidirectional screw 3 2 connected to the grip portion 3, the upper half of the bidirectional screw 3 2 has a forward thread segment 3 2 1, and the lower half has a reverse thread segment 3 2 2, and the outer diameter of the forward thread segment 3 2 1 is larger than the outer diameter of the reverse thread segment 3 2 2 . Referring to the first to third figures, the limiting member 40, in the embodiment, the limiting member 40 is composed of a plurality of nuts 4 丄 and a spacer 42. Referring to the first to third figures, the spring 50 is a compression spring. Referring to the first to third figures, the upper half of the post 6 has an inverse. The threaded hole 6 1 ' and the lower half are connected to the screw 6 2 . Referring to the first to third figures, the connecting unit 7G has a -first connecting portion γ1 and a second connecting portion 7 2 . Referring to the first to third figures, the lock member 80 is a bolt. Please refer to the fourth to fifth figures, the magnetoresistive device 2 of the car, wherein the seat body 9 1 is integrally made of insulating material, and has a j9 1 1 and two wings 9 1 2, the connecting portion 9 1 The first end is provided with a perforation of the steam direction 9 1 3 ', and a longitudinal slot 7 M374886 9 1 5 is defined in the middle portion, and a through slot is formed on both sides of the connecting portion 9 1 1 . 9 1 5 through hole 9 1 7 , the two wing portions 9 1 2 are connected in parallel to the connecting portion 9 1 1 , and the inner sides of the two wing portions gi 2 are spaced apart by a predetermined receiving space 9 1 4 , the two wings An accommodating area 916 is defined in each of the outer portions of the outer portion 9 1 2 , and three accommodating holes g 1 8 penetrating through the inner and outer sides are respectively formed in the accommodating regions 916 of the two wing portions 912, and the accommodating holes g 1 8 are respectively inserted through the inner and outer sides. The hole 9 1 8 is adjacent to the accommodating space 9 χ 4 and is formed with an inner flange 9 1 9 . Referring to the fourth to fifth figures, the magnets 9 2 are respectively inserted into the receiving holes 9丄6 from the outside of the seat body 9 1 and are blocked by the inner flanges 9 1 9 . Instead, it falls out from the inner side, and the magnets 9 2 are sequentially arranged in opposite magnetic directions, that is, arranged in a positive, negative, positive or negative, positive, negative pair arrangement. Referring to the fourth to fifth figures, the spacers 9 3 are made of metal shells and are respectively placed in the accommodating area 9 16 by the outer sides of the seat body 9 1 to be The outer sides of the receiving holes 9丄8 are closed.上述 , , 上述 上述 上述 上述 上述 上述 上述 上述 上述 上述 上述 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本 为本The brake adjusting mechanism i 〇〇, such as the third, sixth, and seventh figures, firstly inserts the spring 50 into the limiting hole 1 1 of the outer casing 并 and abuts the step 1 3 at one end. In the upper threaded hole 21 of the sleeve 2 2 〇 M374886, the inner sleeve 20 is located in the two-way screw 3 - 2 In the upper half, the limiting member 4 is further deducted to the middle of the screw 32 of the control member 3, and the two-way screw 2 of the control member 3 is juxtaposed with the inner sleeve 2 The person is in the limit hole 1 of the outer sleeve 1 and is biased by the limiting member 4 to the other end of the spring 5 Q, and the lock 80 is the outer sleeve! The keyhole locker 4 is inserted into the long groove 2 2 of the inner sleeve member 20, and the post 6 is inserted into the sliding hole 12 of the outer spring sleeve ίο, and the reverse direction The threaded hole 61 is screwed to the reverse threaded portion 322 of the control mechanism 30, and the screw 6 2 of the cup 60 is connected to the first joint portion 7 of the joint unit 7〇, and the joint unit 7 is connected. The second connecting portion 72 of the crucible penetrates into the slot 9 1 5 of the base 9 9 of the magnetoresistive device 90 and is pivoted by the through hole 9 7 to be pivoted to The adjustment mechanism i 枢 is pivotally connected to the magnetoresistive device 20 0 . Of course, the adjusting mechanism of the outer sleeve of the adjusting device is fixed on the bracket 9 of the exercise bicycle, and the seat 9 1 of the magnetoresistive device 2 is also pierced by the connecting portion 9 at the same time. The worker 3 is pivotally connected to the bracket 98. When it is desired to adjust the resistance generated by the device 2 QQ to one of the exercise wheels of the exercise vehicle, the control member ^ 〇 ' of the adjustment mechanism can be rotated, when the control member 3 is rotated in the forward direction, Since the inner sleeve 2 is not rotated by the action of the lock member 80, the forward thread 2 1 of the control member 3 and the forward threaded hole 3 of the inner sleeve 2 are produced. Acting to shift the control member 3 Q downwards - the predetermined first interval is 9 M374886, so that the post 60 is also synchronously moved down with the control member 30, and this control is simultaneously The reverse threaded section 3 2 2 of the member 30 also acts on the reverse threaded hole 6 1 of the post 60, and the post 60 is displaced downwardly by a second distance relative to the control member 30. The magnetic reluctance generated by the resistance wheel 79 is changed by interlocking the reluctance device 200; the course of the control thread 30 is 3 2 1 when the control member 30 is rotated in the reverse direction. And the inner threaded hole 3 2 1 of the inner sleeve 20 acts, and the control member 30 is displaced upward by a second distance, so that the rod 60 is also the same at this time. Stepwise, as the control member 30 moves up, and at the same time, the reverse thread segment 3 2 2 of the control member 30 also acts on the reverse threaded hole 6 1 of the post 60, and the post 6 is actuated. 0 is shifted upward by a second distance relative to the control member 30. In this way, regardless of whether the control member 30 rotates in the forward or reverse direction, the rod 60 and the magnetoresistive device 200 can be displaced by double stroke to achieve the purpose of rapid adjustment. When the emergency braking is to be performed, the control member 30 is directly pressed to directly drive the post 60 and the magnetoresistive device 200 to be displaced for emergency braking, and is limited by the locking member 80. The axial displacement stroke of the inner sleeve 20 is. Further, since the base body 9 1 of the magnetoresistive device 200 is a system, the parallel pitch of the two wing portions 9 1 2 can be maintained constant to maintain a uniform magnetic attraction resistance to the resistance wheel 97. Moreover, since the interlocking effect of mutual magnetic attraction is generated between the shutter 93 and the magnets 9, the efficiency of the magnetic resistance is further improved. The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present embodiments, and is equivalent to variations of the present invention by those skilled in the art and well known to those skilled in the art. The change should still be covered by this creation. M374886 [Simple Description of the Drawings] The first drawing is an exploded perspective view of a preferred embodiment of the present invention. The second drawing is a perspective assembled view of the embodiment shown in the first embodiment. The third drawing is a combined cross-sectional view of the embodiment shown in the first figure. The fourth drawing is an exploded view of the present preferred embodiment. The fifth drawing is a perspective assembled view of the embodiment shown in the first embodiment. The sixth drawing is a schematic diagram of the creation of the preferred embodiment. The seventh drawing is a schematic diagram of the creation of the preferred embodiment. [Main component symbol description] Brake adjustment mechanism for exercise bike 1 Outer casing 1 0 Slide hole 1 2 Lock hole 1 4 Threaded hole 2 1 Control part 3 0 Bidirectional screw 3 2 Reverse thread section 3 2 2 Nut 4 1 spring 5 〇 reverse threaded hole 61 coupling unit 7 0 limiting hole 1 1 step 1 3 inner sleeve 2 0 long groove 2 2 grip 3 1 forward thread segment 3 2 1 stop 4 0 spacer 4 2 Post 6 0 Screw 6 2 First joint 7 1 12 M374886 Second joint 72 Locking element 80 Magnetostrictive device for exercise bike 2 0 0 Seat 9 1 Perforation 9 1 3 Through hole 9 1 7 Housing space 9 1 4 accommodating hole 918 magnet 9 2 pivot 9 9 resistance wheel 9 7 connecting part 9 1 1 through groove 9 1 5 wing 9 1 2 accommodating area 916 inner flange 9 1 9 blocking piece 9 3 bracket 9 8 13