«Μ3.21261 堤板12 滑槽13 椅背支架20 支架21 左/右邊22 枢轴23 擺動軸24 後連動體30 橫向段31 中間縱向桿32 前端33 前架體40 移動體50 壓縮彈簣60 齒輪組70 主動齒輪71 被動齒輪72 操控桿80 轉軸81 轉紐式鎖固結構90 外殼體91 中心孔92 束緊口 94 連動桿95 操控桿96 調整桿206 八、新型說明： 【新型所屬之技術領域】 本創作係有關一種辦公椅可彈性後仰椅背之彈性調整 結構，尤指一種利用一操控桿來控制一轉軸正逆向轉動以 驅動轉軸上二相對楔形塊產生對向移動，藉以驅動一具有 對應斜面之V型移動體作前後向移動，以迫使二壓縮彈簧 同步改變壓縮量，藉以同步調整彈簧力強度，使椅背之後 仰及彈性復位之彈性強度可隨使用者需要而簡便調整者。 【先前技術】 習知辦公椅之椅背及/或連同椅座一體有固定式設計 者，即椅背及/或連同椅座一體只能保持固定在坐姿狀態 3 M321261 而無法調整，也有可調整式設計者，即椅背及/或連同椅 座一體可由平時使用之坐姿狀態向後調整成後仰（仰躺） 狀悲，而其調整方式一般是，利用使用者（坐者）由坐姿向 後仰躺時其上半身所產生之重力直接壓迫在椅背上，以迫 使樞设在椅座底面之底盤或其中之椅背支架向後樞轉，而 ~達成調整成後仰（仰躺）狀態之目的，且當使用者（坐 .者）上半身向前回復成坐姿狀態，該椅背及/或連同椅座 一體可藉彈簧回復力而同時復位。一般可調整成後仰狀態 •之椅背及/或連同椅座一體的結構設計，其係在底盤與椅 背支架之間設一線圈式壓縮彈簧，當椅背及/或連同椅座 一體文坐者上半身所施後仰力而向後樞轉時，可對該壓縮 彈i產生相對壓縮作用，而當坐者上半身向前回復成坐姿 狀態致椅背受力消失或小於彈簧回復力時，該椅背及/或 連同椅座一體即可藉該彈簧回復力而復位；由於該壓縮彈 簧之壓縮罝’也就是彈簧作用力（回復力）的大小，須設 計成可調整式，以可與坐者上半身向後仰躺之荷重相配 #合’否則彈簧作用力（回復力）相對於坐者上半身向後仰 躺之荷重較大時，將使坐者上半身向後仰躺之荷重不足以 -迫使椅背及/或連同椅座一體向後調整成仰躺狀態，造成 後仰調整的困難；而若彈簧作用力（回復力）相對於坐者 上半身向後仰躺之荷重較小時，坐者上半身向後仰躺之荷 重又會迫使椅背及/或連同掎座一體快速向後調整成後仰 狀悲’形成無緩衝力狀態，容易造成後仰動作的危險；因 此習知可調整式設計之椅背及/或連同椅座一體大部分設 具有一彈性調整結構；然，習知彈性調整結構所設之線圈 式壓縮彈簧大都是凸設在椅座底面之底盤（殼體）的外 4 M321261 再於該線圈式塵縮彈箐之中心抽外端上套設一可旋轉 移動之定位螺絲，或於該線圈式壓縮彈簧之外圍套設一可 方疋轉移動之筒形外罩，而藉該定位螺絲或筒形外罩之正逆 旋，以對線圈式壓縮彈簧產生壓縮或釋放效果，藉以改變 壓縮彈簧之壓縮量而相對調壓縮彈簧之作用力（回復力） 大小；惟，習知彈性調整結構直接凸設在椅座底面之底盤 (殼體）的外部，不但影響外觀美感，且使用者（坐者） 坐在椅座上時其手部無法觸及並操作該該定位螺絲或筒形 外罩，致調整操作不§，而最佳調整方式本來就是使用者 j坐者）坐在椅座上自行變換坐姿或仰躺而同步進行壓縮 ^簧之作用力（回復力）大小之調整，因此習知彈性調整 結構之設計未臻理想，而本創作乃針對上述習知彈性調整 結構的缺點而加以改進者。 【新型内容】 本創作主要目的乃在於提供一種辦公椅可彈性後仰椅 背之彈性調整結構，其係包含：—底触咖設在椅座底 上並套接在辦公椅底座之承載軸桿上；一门型椅背支架 2後連結承載-椅背，且其n型左、右邊末端之上端由 夕卜，在底盤殼體之後端上方以形成一樞軸，其左、右邊 末端之下卿成-擺動軸並跨設在底触體後端下方左、 内：：前後向樞轉位移；一丄型後連動體設在底 JZ,且、杈向段連結在該擺動軸之前方而可隨擺動軸 移且其中間縱向桿亦同步前後向位移；型前 左、右側之間跨設-轉軸，轉軸上左、右侧各設-可對向移動之楔形塊，藉以驅動其後方—具有v型對應面 M321261 之v型移動體作前後向位移；二壓縮彈簧分別夾設在丄型 連動塊及移動體之間並位於中間縱向桿之左、右兩侧，使 移動體之前後向移動可對二壓縮彈簧產生放鬆或壓縮作 用，藉以同步調整二壓縮彈之彈簧力強度；一齒輪組設在 匸型前架體一外侧邊上用以操控楔形塊之轉軸正逆向轉動 以使v型移動塊前後向移動；一操控桿延伸至椅座底面近 •外緣邊用以操控齒輪組轉動；藉上述結構，使用者可藉操 控桿來調整二壓縮彈簧之壓縮量，使椅背向後樞轉一後仰 •角度並彈性復位之彈性力（或強度）可隨使用者需要而簡 便調整至-適當限度，藉以增進椅背後仰操作及自動復位 之使用效果者。 t創作再一目的乃在於提供一種辦公椅可彈性後仰椅 背之彈性調整結構，其+該操控桿係設在供調整椅座高低 ，孔壓缸㈣桿之中心軸上，使該操控桿可藉氣壓缸調整 桿之中妹心而延伸至椅座底面近外緣邊，藉此使用者 可坐在椅座上自行變換坐姿及仰躺而同步調整壓«Μ3.21261 Bank 12 Chute 13 Back bracket 20 Bracket 21 Left/Right 22 Pivot 23 Swinging shaft 24 Rear linkage 30 Transverse section 31 Intermediate longitudinal rod 32 Front end 33 Front frame body 40 Moving body 50 Compression magazine 60 Gear set 70 Drive gear 71 Passive gear 72 Joystick 80 Rotary shaft 81 Rotary lock structure 90 Outer housing 91 Center hole 92 Tightening port 94 Linking lever 95 Joystick 96 Adjusting rod 206 Eight, new description: [New technology Field] This creation relates to an elastic adjustment structure of an office chair which can be elastically reclined back, in particular, a control lever is used to control a reverse rotation of a rotating shaft to drive the opposite movement of the opposite wedge blocks on the rotating shaft, thereby driving one The V-shaped moving body with the corresponding inclined surface is moved forward and backward to force the two compression springs to synchronously change the compression amount, thereby synchronously adjusting the spring force strength, so that the elastic strength of the back of the seat back and the elastic return can be easily adjusted according to the needs of the user. . [Prior Art] The back of the chair of the office chair and/or the fixed seat with the seat, that is, the seat back and/or the seat together can only remain fixed in the sitting position 3 M321261 and cannot be adjusted, and can also be adjusted. The designer, that is, the back of the chair and/or the seat together with the seat can be adjusted backwards into a recline (recumbent) sorrow, and the adjustment is generally performed by the user (sitting) leaning back from the sitting position. When lying, the gravity generated by the upper body is directly pressed against the back of the chair, so as to force the chassis pivoted on the bottom surface of the seat or the seat back bracket thereof to pivot backward, and the purpose of adjusting to the state of reclining (lying back) is achieved. And when the upper body of the user (sitting) returns to the sitting position forward, the seat back and/or the seat together can be simultaneously reset by the spring restoring force. Generally adjustable to the reclining state • the back of the chair and/or the structural design integrated with the seat, which is provided with a coil compression spring between the chassis and the seat back bracket, when the seat back and/or together with the seat When the upper body of the occupant is tilted backwards and tilted backward, the compression bomb i can be relatively compressed, and when the upper body of the occupant returns to the sitting position and the seat back force is lost or less than the spring restoring force, the seat back And/or integrated with the seat to be reset by the spring restoring force; due to the compression 罝' of the compression spring, that is, the magnitude of the spring force (recovery force), it must be designed to be adjustable to allow the upper body to be seated Backward lie on the weight of the load #合' Otherwise the spring force (recovery force) relative to the upper body of the seater back to the back of the load is greater, will make the upper body of the seat back to the back of the load is not enough - forcing the back and / or Adjusting the seat back to the reclining state together with the seat seat, causing difficulty in reclining adjustment; and if the spring force (recovery force) is smaller than the load of the upper body of the seater, the upper body of the seat is backward. The weight of the lying will force the back of the chair and/or the back of the seat to be quickly adjusted backwards to form a non-buffering state, which is likely to cause a risk of reclining; therefore, the back of the adjustable design and/or Or a plurality of elastic adjustment structures are integrally provided with the seat; however, the coil compression springs provided by the conventional elastic adjustment structure are mostly protruded from the outer surface of the chassis (the casing) of the seat 4 M321261 and then the coil The center of the dust-reducing magazine is provided with a rotatable moving positioning screw on the outer end of the dust-removing magazine, or a cylindrical outer cover that can be rotated around the coil-type compression spring, and the positioning screw or the cylinder is used The positive and negative rotation of the outer cover is used to compress or release the coil compression spring, thereby changing the compression amount of the compression spring and relatively adjusting the force (recovering force) of the compression spring; however, the conventional elastic adjustment structure is directly convex On the outside of the chassis (housing) on the underside of the seat, not only the aesthetic appearance is affected, but also when the user (sit) sits on the seat, the hand cannot be touched and the positioning screw or the cylinder is operated. The cover, the adjustment operation is not §, and the optimal adjustment method is originally the user j seater) sitting on the seat to change the sitting posture or lying on the seat and simultaneously compressing the force of the spring (recovery force), therefore The design of the conventional elastic adjustment structure is not ideal, and the present invention is improved in view of the above-mentioned disadvantages of the conventional elastic adjustment structure. [New content] The main purpose of this creation is to provide an elastic adjustment structure for the backrest of the office chair, which includes: - the bottom touch coffee is placed on the bottom of the seat and is sleeved on the bearing shaft of the office chair base One door back bracket 2 is connected to the back of the seat back, and the n-shaped left and right ends are upper, and the rear end of the chassis is formed to form a pivot, which is below the left and right ends. Qingcheng-swing axis and straddles the left and bottom of the bottom of the bottom body:: forward and backward pivot displacement; one 后 type rear linkage is set at the bottom JZ, and the 杈 section is connected in front of the oscillating axis It can be moved with the swing axis and the longitudinal rod is also synchronously displaced in the forward and backward direction; the front left and right sides are arranged with a rotating shaft, and the left and right sides of the rotating shaft are respectively arranged with a wedge-shaped block that can be moved oppositely to drive the rear side thereof. The v-shaped moving body having the v-shaped corresponding surface M321261 is moved forward and backward; the two compression springs are respectively disposed between the 连-type linking block and the moving body and located on the left and right sides of the intermediate longitudinal rod, so that the moving body is backward and backward Movement can relax or compress the two compression springs By synchronously adjusting the spring force strength of the two compression bombs; a gear set is disposed on an outer side of the 前 type front frame body for controlling the rotation of the wedge block to be reversely rotated to move the v-shaped moving block forward and backward; To the bottom of the seat, the outer edge of the seat is used to control the rotation of the gear set. With the above structure, the user can adjust the compression of the two compression springs by the lever, so that the back of the seat is pivoted backwards, tilted back, angled and elastically reset. The elastic force (or strength) can be easily adjusted to the appropriate limit according to the user's needs, thereby improving the use of the chair back and the automatic reset. Another purpose of the creation is to provide an elastic adjustment structure for the elastic backrest of the office chair. The + control lever is disposed on the central axis of the adjustment seat height and the hole cylinder (four), so that the control lever It can be extended to the near outer edge of the bottom of the seat by the sister of the pneumatic cylinder adjustment lever, so that the user can sit on the seat and change the sitting position and lie on the same side to adjust the pressure simultaneously.
法育之作用力（回復力）A小’藉以增進調整操作之便 利性。 本創作另目的乃在;^提供—種辦公椅可彈性後椅 背之彈性調整結構’其進一步在〔型前架體之前方固設一 轉鈕式鎖固結構’該轉鈕式鎖固結構包含一外殼 一 中心孔’供丄型後連動體之中間縱向桿可向前延伸在中心 孔内刖後向位移；該外殼體内對應該中心孔設一轉鈕體， 體係對應套在該中間縱向桿之前端上，且該轉紐體 配㈠亥中間縱向桿之前端而設置一束緊口，該束緊口包 6 M321261 括-第-角度之寬鬆槽供中間縱向桿之前端可前後向 滑動，及第二角度之束緊槽供可將中間縱向桿之前端 而使其無法前後向滑動；又該轉紐體由設在椅座底面近外 緣邊之一操控桿控制轉動，藉以控制轉鈕體及其上束緊口 在第-角度之寬鬆槽及第二角度之束緊槽之間轉動，以相 對放鬆或束緊該中間縱向桿，使椅背可隨使用者（坐 需要而選擇定位在坐姿或後仰（仰躺）狀態，藉以增進 創作之使用效果。 9 【實施方式】 為使本創作更加明確詳實，_舉較佳實_並配合 下列圖不，將本創作之結構及其技術特徵詳述如後. 請參照圖1、2及圖3、4所示，其分別係本創作一 實施例組裝在椅座上並呈坐姿狀態之立體圖及其局部放大 圖以及呈後仰（仰躺）狀態之立體圖及其局部放大圖；本 創作辦公椅可彈性後仰椅背之彈性調整結構丨，主要係包 含-底盤殼體1G、- Π型椅背支架2G、—丄型後連動體 3〇、一 C型前架體40、一 v型移動體5〇、二壓縮彈脊6〇、 -齒輪組7G及-操控桿8〇，其中，該门型椅背支架2〇係柩 接在底触體1G之後端，而該丄型錢動㈣、〔型前架 體40、V型移動體5G、a縮彈篑6Q及齒輪組7()等係容設在 底盤破體1G内部’ *操控桿8Q係凸設在底盤殼體外部並 延伸至椅座底面202近外緣邊供坐者之手部可直接操作。 該底盤戒體10係以鎖固方式設在辦公椅2之椅座 之底面202上，其上設一軸孔丨丨以套接在辦公椅2之底座 7 M321261 203之承載轴桿2Q4上。 該门型椅背支架20係設在底盤殼體10外部，其後端設 一支架21，供向後連結承載一椅背2〇5 ，门型椅背支架加 之门型左、右邊22之末（前）端之上端夾設在底盤殼體1〇 之後端左、右侧堤板12之上方並形成一樞軸23，而其左、 右邊22之末端下端形成一擺動軸24跨設在底盤殼體忉後端 下方二左、右對稱滑槽13内而可前後向樞轉移動，使椅背 205可藉门型椅背支架2〇在受力壓迫時向後樞轉一後仰角 度如圖3、4所示，並且在受力消失時可向前彈性復位。 忒丄型後連動體3〇係設在底盤殼體内部，其橫向段 31係套接連結在擺動軸24上或前方，而可隨擺動轴24前後 白移動而其中間縱向桿32向前延伸致其前端33可穿過v 型移動體50上一對應中央孔兕及仁型前架體4〇之對應孔， 可使型後連動體30之前後向移動相對穩定。 清同時參照圖5、6所示，該c型前架體40係設在底 盤殼體1G内部，其左、右侧之間跨設—轉㈣，該轉軸“ ^之左、右侧各設一可對向移動之對稱楔形塊42，該二對 稱楔形塊42之斜面43分別對應貼合於一 ¥型移動體5〇之前 面二呈V型之對應斜面51上，當二對稱楔形塊42隨轉軸41 之正/逆轉而同時向内（中央）或向外（左、右兩外侧） 對向移動時，藉斜面43與對應斜面51之貼合可驅動該V型 移動體5G作前後向移動；又Vl!移動㈣上設_中央孔犯 及〔型前架體40上設-對應孔（圖未示）供丄型後連動體 30之中間縱向桿32及其前端33穿過。 該一壓縮彈簧6 〇係分別夾設在丄型後連動體3 〇之橫向 & 31與移動體5G之對應斜面51之另—面（後面）間，並對 8 -M321261 稱位於丄型後連動體3〇之中間縱向桿32之左、右兩侧，使 移動體50之前後向移動可對二壓縮彈簧6〇產生相對放鬆或 壓縮作用，藉以同步改變或調整二壓縮彈簧6〇之壓縮量， 即其彈簧力大小或強度。 該窗輪組70係設在c型前架體40之一外侧邊上，該齒 輪組70至少包含一主動齒輪71及一被動齒輪72，用以操控 楔形塊42之轉軸41呈正/逆向轉動，以使移動塊5〇前後向 移動。 該操控桿80係延伸設在底盤殼體1〇之外部，其轉軸81 連接至齒輪組70之主動齒輪71之軸心，用以操控齒輪組70 轉動並帶動轉轴41轉動，而該操控桿80可為搖動桿型態， 俾使用者（坐者）可坐在椅座2〇1上由椅座底面202近外 緣邊處直接操控主動齒輪71轉動，也就是使用者（坐者） 可坐在椅座201上自行變換坐姿或仰躺而同步調整壓縮彈 菁之作用力（回復力）大小至個人使用之最佳狀態，藉以 增進調整操作之便利性及效率。 又該操控桿80之轉轴81可設在供調整椅座201高低之 氣壓缸調整桿206之中心軸上如圖1〜4所示，也就是將 氣壓缸調整桿206設計為中空轴心型態，使該操控桿8〇之 轉軸81設在該中空軸心上並延伸至椅座底面202近外緣 邊’但不影響原有氣壓缸調整桿206之操作功能；而由於 氣壓缸調整桿206之結構及操作功能為習知技術，故於此 不另圖示或說明。 w月同時參照圖7、8所不’本創作進一步可在c型前 架體40之前方固設一轉鈕式鎖固結構90，該轉鈕式鎖固結 構90包含一外殼體91，該外殼體91上設有一中心孔92，使 9 M321261 丄型後連動體30之中間縱向桿32可向前延伸並穿過V型移 動體50上之中央孔52及匸型前架體40上之對應孔（圖未 示）而使其前端33套入中心孔92中，當Π型椅背支架20因 椅背205向後仰躺而產生樞轉動作時，丄型後連動體及 其中間縱向桿32可隨擺動軸24向前位移，使中間縱向桿32 之前端33可在中心孔92内向前位移如圖3、4所示；又在The force of the legal education (recovery power) A is small to enhance the convenience of the adjustment operation. The purpose of this creation is to provide a flexible adjustment structure for the backrest of the office chair, which is further provided with a turn-locking structure in front of the front frame. The rotary lock structure comprises a casing The central longitudinal rod of the center hole 'supplied type rear linkage body can extend forwardly in the center hole and rearwardly displaced; the outer casing body is provided with a rotary button body corresponding to the center hole, and the system is correspondingly sleeved on the front end of the intermediate longitudinal rod And the turn-up body is provided with a bundle of tight ends at the front end of the middle longitudinal rod, and the bundle tight-mouth bag 6 M321261 includes a --angle loose groove for the front end of the intermediate longitudinal rod to slide forward and backward, and The two-angle bundle tight groove can be used to slide the front end of the intermediate longitudinal rod so that it cannot slide back and forth; and the turn-up button is controlled by a control rod disposed on the bottom edge of the bottom surface of the seat to control the rotary knob body and The upper tightening port rotates between the first-angle loose groove and the second-angle tightening groove to relatively loosen or tighten the intermediate longitudinal rod, so that the seat back can be positioned in the sitting position according to the user's needs. Or reclining (lying) In order to enhance the use of creation. 9 [Implementation] In order to make this creation more clear and detailed, _ to better _ and with the following diagrams, the structure and technical features of this creation are detailed as follows. Please refer to Figure 1. 2 and 3 and 4 are respectively a perspective view of the embodiment of the present invention assembled on the seat and in a sitting state, a partial enlarged view thereof, and a perspective view in a state of reclining (lying) and a partial enlarged view thereof. The creative office chair can be elastically adjusted to the elastic backrest of the chair back, mainly including: chassis housing 1G, - 椅 type seat back bracket 2G, 丄 type rear linkage 3 〇, a C type front frame 40 a v-shaped moving body 5〇, a second compression ridge 6〇, a gear set 7G, and a control lever 8〇, wherein the door type seat back bracket 2 is spliced to the rear end of the bottom contact body 1G, and the丄 type money movement (four), [type front frame body 40, V-type mobile body 5G, a contraction magazine 6Q and gear set 7 () and other systems are installed inside the chassis 1G inside the chassis] * The joystick 8Q is protruding from the chassis The outer part of the housing extends to the outer edge of the bottom surface 202 of the seat for the hand of the rider to be directly operated. The chassis body 10 is locked The method is disposed on the bottom surface 202 of the seat of the office chair 2, and is provided with a shaft hole 套 to be sleeved on the bearing shaft 2Q4 of the base 7 M321261 203 of the office chair 2. The door type seat back bracket 20 is The outside of the chassis shell 10 is provided with a bracket 21 at the rear end for rearwardly supporting a seat back 2〇5, the door type back bracket and the door type left and right end 22 (front) end upper end is clamped to the chassis shell After the body 1〇, the left and right banks 12 are formed above a pivot shaft 23, and the lower ends of the left and right sides 22 are formed with a swinging shaft 24 which is symmetrical under the rear end of the chassis casing. The chute 13 is pivotally movable forward and backward, so that the seat back 205 can be pivoted backward by a door-type seat back bracket 2 when pressed under pressure, as shown in FIGS. 3 and 4, and the force is lost. It can be elastically reset forward. The rear type linkage 3 is disposed inside the chassis casing, and the transverse section 31 is sleevedly coupled to the front or the front of the swing shaft 24, and can be moved forward and backward with the swing shaft 24 and the middle longitudinal rod 32 extends forward. The front end 33 can pass through a corresponding hole of the corresponding central hole and the front frame body 4 of the v-shaped moving body 50, so that the rearward movement of the post-linking body 30 can be relatively stable. Referring to FIGS. 5 and 6 simultaneously, the c-type front frame 40 is disposed inside the chassis housing 1G, and the left and right sides are spanned and turned (four), and the rotating shaft is located at the left and right sides of the shaft. A symmetrical wedge-shaped block 42 that can be moved in the opposite direction, and the inclined surface 43 of the two-symmetric wedge-shaped block 42 is respectively attached to the corresponding inclined surface 51 of the V-shaped surface of the front surface of the two-shaped movable body 5, and the two symmetric wedge-shaped blocks 42 When the moving shaft 41 is moved inward (center) or outward (left and right outer sides) in the opposite direction, the bonding of the inclined surface 43 and the corresponding inclined surface 51 can drive the V-shaped moving body 5G for forward and backward directions. Moving; and Vl! moving (4) is provided with a central hole and a corresponding hole (not shown) for the intermediate longitudinal rod 32 and its front end 33 of the rear type linkage 30. A compression spring 6 is respectively interposed between the lateral & 31 of the 后-type rear linkage 3 与 and the other surface (back) of the corresponding inclined surface 51 of the movable body 5G, and is connected to the 8-M321261 The left and right sides of the middle longitudinal rod 32 of the body 3, so that the backward movement of the moving body 50 can relatively relax the two compression springs 6〇 or By contracting, the amount of compression of the two compression springs 6〇, that is, the magnitude or strength of the spring force thereof, is synchronously changed or adjusted. The window wheel set 70 is disposed on one outer side of the c-type front frame body 40, and the gear set 70 is at least A driving gear 71 and a driven gear 72 are included for controlling the rotating shaft 41 of the wedge block 42 to rotate forward/reversely to move the moving block 5 〇 forward and backward. The operating lever 80 is extended outside the chassis housing 1 The rotating shaft 81 is connected to the axis of the driving gear 71 of the gear set 70 for controlling the rotation of the gear set 70 and driving the rotating shaft 41 to rotate, and the operating lever 80 can be a rocking rod type, and the user (sit) The driving gear 71 can be directly controlled by the near outer edge of the seat bottom surface 202 on the seat base 2〇1, that is, the user (sitting person) can sit on the seat 201 and change the sitting posture or lie down and adjust simultaneously. The force of the compression elastic (recovery force) is up to the best state for personal use, thereby improving the convenience and efficiency of the adjustment operation. The rotation shaft 81 of the control lever 80 can be set in the pneumatic cylinder for adjusting the height of the seat 201. Adjusting the center axis of the rod 206 as shown in Figures 1~4 That is, the pneumatic cylinder adjusting rod 206 is designed as a hollow shaft type, so that the rotating shaft 81 of the operating rod 8 is disposed on the hollow shaft center and extends to the outer edge of the seat bottom surface 202 but does not affect the original The operation function of the pneumatic cylinder adjustment rod 206 is provided; and since the structure and operation function of the pneumatic cylinder adjustment rod 206 are conventional technologies, they are not illustrated or described herein. Further, a rotary button type locking structure 90 can be fixed in front of the c-type front frame body 40. The rotary button type locking structure 90 includes an outer casing 91. The outer casing 91 is provided with a central hole 92 for interlocking with the 9 M321261 type. The intermediate longitudinal rod 32 of the body 30 can extend forward and pass through the central hole 52 in the V-shaped moving body 50 and the corresponding hole (not shown) on the 前-shaped front frame 40 to have its front end 33 nested in the center hole 92. When the cymbal seat back bracket 20 is pivoted due to the back of the seat back 205, the 后-type rear linkage and its intermediate longitudinal rod 32 can be displaced forward with the swing shaft 24, so that the front end of the intermediate longitudinal rod 32 33 can be displaced forward in the central hole 92 as shown in Figures 3 and 4;
該外殼體91内部對應該中心孔92設置一轉鈕體93，該轉鈕 體93上設一束緊口 94，並使該束緊口 94對應套設在該中間 縱向桿32之前端33上；該束緊口 94包括一第一角度之寬鬆 槽941供中間縱向桿32之前端33可在寬鬆槽941中前後向 ^由滑動，及第二角度之束緊槽942供可將中間縱向桿之 前端扣緊而使其無法前後向滑動；又該轉鈕體93係藉其外 圍-連動桿95之上下位移而控制轉動，該連動桿95係：設 在椅座底面202近外緣邊之一操控桿96控制移動，使該操 控桿96可驅動轉鈕體93及其上束緊口 94在第一角度之^鬆 槽941 (如圖7所示）及第二角度之束緊槽_ (如圖： 所示）之間轉動，以相對放鬆或束緊該中間縱向桿％之前 端33，而使椅背可隨使用者（坐者）需要而選擇定位在坐 仰躺）狀態’也就是當操控桿96驅動轉紐體93 緊口 94轉動至第一角度之寬鬆槽941接觸 m二财Ρβ1^#32<_33可在寬鬆槽941中 ϊΐ ，此時使用者（坐者）可隨意調整椅背在坐 姿或仰躺狀g ;當操控桿96驅動轉_93及其 =動至第二角度之束緊槽942接觸狀態時如圖8所示，兮 :間縱向桿32之前端33即被束緊槽942扣緊而 ： 動’使门型椅背支架20及椅背挪與底盤殼體^之間的;目 •M321261 對位置定位處而無法樞轉，，也就是使用者（坐者）可將门 型椅背支架20及椅背205暫時設定並停駐於坐姿或仰躺中 一種使用狀態，如設定停駐於坐姿使用狀態，則使用者 (坐者）縱然自行仰躺使其無法再調整變化，可增進本創 作之使用效果。 以上所述僅為本新型的較佳實施例，對本新型而言僅 -是說明性的，而非限制性的；本專業技術人員理解，在本 新型權利要求所限定的精神和範圍内可對其進行許多改 9 變’修改’甚至等效變更，但都將落入本新型的保護範圍 内。 【圖式簡單說明】 圖1係本創作一實施例組裝在椅座上並呈坐姿狀態之立體 不意圖。 圖2係圖1中本創作之放大示意圖。 圖3係圖1呈後仰（仰躺）狀態之立體示意圖。 Φ 圖4係圖3中本創作之放大示意圖。 •圖5係本創作中C型前架體部分之立體組合示意圖。 圖6係圖5之立體分解示意圖。 圖7係本創作轉鈕式鎖固結構在放鬆狀態之正視示意圖。 ® 8係本創作轉鈕式鎖固結構在束緊狀態之正視示意圖。 【主要元件符號說明】 軸孔11 滑槽13 彈性調整結構1 底盤殼體1〇 堤板12 •M321261 椅背支架20 左/右邊22 擺動轴24 橫向段31 前端33 • 轉軸41 斜面43 斜面51 φ 壓縮彈簧60 主動齒輪71 操控桿80 轉鈕式鎖固結構90 中心孔92 束緊口 94 束緊槽942 操控桿96 | 椅座201 ^底座203 椅背205 支架21 樞軸23 後連動體30 中間縱向桿32 前架體40 楔形塊42 移動體50 中心孔52 齒輪組70 被動齒輪72 轉軸81 外殼體91 轉鈕體93 寬鬆槽941 連動桿95 辦公椅2 底面202 轴桿204 調整桿206 12A knob body 93 is disposed on the inner casing 91 corresponding to the center hole 92. The knob body 93 is provided with a tightening groove 94, and the tightening port 94 is correspondingly sleeved on the front end 33 of the intermediate longitudinal rod 32. The tightening groove 94 includes a first angle loose groove 941 for the intermediate longitudinal rod 32 front end 33 to be slidable forward and backward in the loose groove 941, and the second angle tightening groove 942 for the intermediate longitudinal rod The front end is fastened so that it cannot slide back and forth; and the rotary button body 93 is controlled to rotate by the upper and lower displacement of the outer-linking lever 95, and the interlocking lever 95 is disposed on the outer edge of the bottom surface 202 of the seat. A lever 96 controls the movement so that the lever 96 can drive the knob body 93 and its upper strap 94 at a first angle of the slot 941 (shown in Figure 7) and the second angle of the slot _ Rotate between (as shown in the figure) to relatively loosen or tighten the intermediate longitudinal rod % front end 33, so that the seat back can be positioned to sit in the reclining state as the user (sit) needs That is, when the lever 96 drives the rotating body 93, the tight opening 94 is rotated to the first angle of the loose slot 941 to contact m 二财Ρβ1^#32<_3 3 can be squatted in the loose slot 941, at this time the user (sit) can freely adjust the seat back in the sitting position or the reclining g; when the lever 96 drives the turn _93 and its = move to the second angle of the tight groove When the 942 is in contact state, as shown in FIG. 8, the front end 33 of the longitudinal rod 32 is fastened by the tightening groove 942 to: "Move" between the door back bracket 20 and the seat back and the chassis housing ^ ; M321261 can not be pivoted to the position, that is, the user (sit) can temporarily set the door back bracket 20 and the seat back 205 and park in a sitting or lying position, such as When the setting is parked in the sitting position, the user (sit) can lie on his own and can no longer adjust and change, which can enhance the use effect of the creation. The above description is only the preferred embodiment of the present invention, and it is intended to be illustrative only, and not restrictive, and it is understood by those skilled in the art that It has undergone many changes, modifications, and even equivalent changes, but will fall within the scope of this new type of protection. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of an embodiment of the present invention assembled on a seat and in a sitting state. Figure 2 is an enlarged schematic view of the creation of Figure 1. Fig. 3 is a perspective view showing the state of Fig. 1 in a recline (lying back) state. Φ Figure 4 is an enlarged schematic view of the creation of Figure 3. • Figure 5 is a three-dimensional combination of the C-type front frame parts in this creation. Figure 6 is a perspective exploded view of Figure 5. Fig. 7 is a front elevational view showing the locked button type locking structure of the present invention in a relaxed state. ® 8 is a front view of the twisted lock mechanism in the tightened state. [Main component symbol description] Shaft hole 11 Chute 13 Elastic adjustment structure 1 Chassis housing 1 〇 板 12 • M321261 Back bracket 20 Left/right 22 Swing shaft 24 Transverse section 31 Front end 33 • Rotary shaft 41 Bevel 43 Bevel 51 φ Compression spring 60 drive gear 71 control lever 80 rotary lock structure 90 center hole 92 tightening port 94 tightening groove 942 lever 96 | seat 201 ^ base 203 seat back 205 bracket 21 pivot 23 rear linkage 30 intermediate longitudinal rod 32 Front frame 40 Wedge block 42 Moving body 50 Center hole 52 Gear set 70 Passive gear 72 Rotary shaft 81 Outer housing 91 Rotary body 93 Loose groove 941 Linkage lever 95 Office chair 2 Bottom plate 202 Shaft 204 Adjustment lever 206 12