1359000 - 100年12月14日修(美)正替換頁 第二行程調整機構40 内側端411 把柄42 擋止塊44 導銷46 椅背深度調整機構60 齒排結構62 行程控制裝置64 定位環66 栓銷41 外側端412 彈性件43 凸柱45 椹轴50 頂面61 擔止面63 第二調整桿65 凸輪67 八、 本案若有化學式時，請揭示最能顯示發明特徵化 學式：（無） 九、 發明說明： 【發明所屬之技術領域】 本發明係有關一種辦公椅雙行程椅背仰躺調整機 構，尤指一種辦公椅在藉由第一行程調整機構改變椅背 傾斜位置後，可再藉由第二行程調整機構使椅背再傾斜 φ 一角度位置，藉以避免習知第一行程調整機構藉一次操 作即可達成第一行程及第二行程傾斜角度所造成的危險 性，達成辦公椅椅背以雙行程分次調整傾斜角度之安全 效果者。 【先前技術】 目前為提昇一座椅如辦公椅之使用功能及其舒適 度，常在座椅設計多種不同的調整功能，如椅扶手高低 調整機構、椅座高低調整機構、及椅座後傾調整機構、 椅背後傾調整機構、椅背深度調整機構或腰靠凸出調整 機構等；上述不同功能的調整機構都已有多種不同的結 3 1359000 • , 100年12月14日修(美)正替換頁 構設計，其中在椅座或椅背調整機構方面，包含：中華 民國新型 Μ321261、Μ326807、Μ308687、Μ3281531、 Μ272463、Μ270739、Μ244008、Μ244006、 Μ244008，發明公告號1227118、新型公告號00480961、 00312709 、 00219466 、 00148174 、 00051473 、 0578518 、1359000 - December 14, 2010 Repair (US) replacement page Second stroke adjustment mechanism 40 Inner end 411 Handle 42 Stop block 44 Guide pin 46 Back depth adjustment mechanism 60 Tooth row structure 62 Stroke control device 64 Positioning ring 66 Bolt 41 Outer end 412 Elastic member 43 Boss 45 Truss 50 Top surface 61 Support surface 63 Second adjustment lever 65 Cam 67 8. If there is a chemical formula in this case, please reveal the chemical formula that best shows the invention: (none) [Technical Field] The present invention relates to an office chair double-stroke backrest reclining adjustment mechanism, and more particularly to an office chair which can be borrowed after changing the tilt position of the seat back by the first stroke adjustment mechanism. The second stroke adjustment mechanism tilts the seat back by an angle position φ to avoid the danger caused by the first stroke adjustment mechanism by one operation, and the first stroke and the second stroke angle are achieved, and the office chair is realized. The safety effect of adjusting the tilt angle in two steps is used. [Prior Art] At present, in order to improve the function and comfort of a seat such as an office chair, various adjustment functions of the seat design, such as the height adjustment mechanism of the armrest, the height adjustment mechanism of the seat, and the backrest of the seat are often used. Adjustment mechanism, chair back tilt adjustment mechanism, seat back depth adjustment mechanism or lumbar support adjustment mechanism; the above-mentioned different function adjustment mechanisms have a variety of different knots 3 1359000 • , December 14, 100 repair (US) The design of the frame structure is replaced, in which the seat or the backrest adjustment mechanism includes: the new Chinese Μ321261, Μ326807, Μ308687, Μ3281531, Μ272463, Μ270739, Μ244008, Μ244006, Μ244008, invention announcement number 1227118, new announcement number 00480961, 00312709, 00219466, 00148174, 00051473, 0578518,
00444555、306219、296582，中國新型 ZL99235672.5 及 美國發明US6,994,400等’其中，椅座高低調整機構或椅 背調整機構大部分係設置在椅座底面一底盤之主架體 (第一架體）的内部，再分別利用一控制桿由底盤向外 延伸，使控制桿之一端延伸至椅座底面之邊緣供坐者之 手部操控如以手扳動該控制桿’另一端則連結至底盤内 部之椅座高低調整機構或椅背調整機構的相關控制件； 一般而言，椅座高低調整機構及椅背調整機構係分別利 用一控制桿操作，如其中一控制桿設在椅座底面之右侧 邊緣供人以右手操控，而另—控制桿則設在椅座底面之 左側邊緣供人以左手操控。00444555, 306219, 296582, China's new ZL99235672.5 and the US invention US6,994,400, etc. 'The seat height adjustment mechanism or the seat back adjustment mechanism is mostly disposed on the bottom of the seat and the main frame of the chassis (the first frame) The inside of the chassis is extended outward from the chassis by a lever, so that one end of the lever extends to the edge of the bottom surface of the seat for the handle of the seater to handle the lever, and the other end is connected to the chassis. The control part of the inner seat height adjustment mechanism or the seat back adjustment mechanism; generally, the seat height adjustment mechanism and the seat back adjustment mechanism are respectively operated by a control lever, such as one of the control rods is disposed on the bottom surface of the seat The right edge is for the right hand, while the other lever is located on the left side of the bottom of the seat for left-handed control.
目前辦公椅的使用除了基本坐靠功能外，仰躺功能 之需要性也日漸提高.，對於經常性、長時間坐在辦公椅 上之工作者如電腦使用者而言，一辦公椅已被當作工作 椅、休息椅或休閒椅等多用途使用，故辦公椅之椅背的 角度調整範圍就必須符合上述多用途之使用功能；又， 目前習知之椅背傾斜調整機構大部分都屬於一種單行程 之調整機構’也就是藉由-單行程調整機構以—次操作 即1同時達成第—行程之傾斜角度如向後傾斜約加度供 Ϊί:;躺姿態作淺度休息’及第二行程之傾斜角度如. =月攸 竹私之20度傾斜角度再向後傾斜一適當角度 者可進-步以較傾斜之仰躺姿態作深度休 後調整傾斜3〇度）；然，上述之單行程調 整機構在彳呆作使用時，坐者須自我控制以選定其所欲之 4 1359000 100年12月14日修(美)正替換頁 。 椅背傾斜角度，由於一般辦公椅之底座設有滾輪以可在 地面滑動移位，因此當坐者在操作單行程調整機構時， 因個人疏忽或失控而容易直接向後仰躺至第二行程之傾 斜角度，即椅背越過第一行程之約20度傾斜角度至直接 向後調整傾斜角度至約30度，此時因向後仰躺角度過大 而容易發生向後翻倒之危險；.而本發明主要係利用雙行 程分次調整以分別控制第一行程與第二行程的椅背傾斜 角度，達成辦公椅椅背以雙行程分次調整傾斜角度之安 全效果，藉以增進辦公椅椅之使用效率。 • 【發明内容】 本發明主要目的乃在於提供一種辦公椅雙行程椅背 仰躺調整機構，包含：一第一架體，其頂面係鎖固在辦 公椅坐的底面處，其底面連結一支撐腳架，其後端與一 第二架體對應樞接結合，其内部設有一第一行程調整機 構供可調整椅背的傾斜位置，及一椅座高低控制機構供 可調整椅座的高低位置；一第二架體，其前端與第一架 體對應樞接結合，其後端與辦公椅椅背鎖固結合，且在 其底部設有一彈性裝置供可調整椅背傾斜時的支撐強 φ 度；及一第二行程調整機構，其係設置在第一架體及第 二架體之間，供可在第一行程機構改變椅背的傾斜位置 後，可使椅背再傾斜一角度範圍；其中，當坐者操作第 一行程調整機構以使椅背向後傾斜一適當角度供坐者仰 躺時，坐者可進一步操作該第二行程調整機構以使斜傾 角度從第一行程之傾斜角度再向後傾斜一適當角度而達 成第二行程的傾斜角度，達成辦公椅椅背以兩行程分次 調整傾斜角度之安全效果。 本發明之再一目的乃在於提供一種辦公椅雙行程椅 背仰躺調整機構，其中該第二架體上進一步可設置一椅 背深度調整機構，其包含一殼體結構，其上設有複數個 5 1359000 100年12月14日修(美)正替換頁 ^ 齒排結構及複數個擋止面，並藉由設置在第二架體上之 一行程控制裝置中之複數個定位環供可與齒排結構之凹 槽處對應卡合，及複數個凸輪供可與抵壓擋止面而對椅 背深度調整機構形成一固定定位效果；藉此，可配合需 要而將椅背向斜後方移動，以增進坐者的舒適性。 【實施方式】 為使本發明更加明確詳實，茲舉一較佳實施例並配 合下列圖示，將本發明之結構及其技術特徵詳述如後： ^ 參考圖1〜4所示，其分別係本發明辦公椅雙行程 椅背仰躺調整機構一實施例之立體示意圖、立體組合 圖、立體組合之局部放大圖及立體分解示意圖。本發明 辦公椅雙行程椅背仰躺調整機構1係安裝在辦公椅座10 的底面11上使用，其一端與椅背13鎖固結合，其包含： 一第一架體20、一第二架體30及一第二行程調整機構 40 ° 該第一架體20頂面係利用鎖固件與辦公椅座10的底 面11鎖固結合，且其底面連結一支撐腳架12，並藉由一 枢-轴50穿過第一架體20及第二架體30以對應樞接結合， • 該第一架體20設有一第一行程調整機構21並藉由操作第 一調整桿211可使第二架體30以樞軸50為軸心樞轉一適 當角度如22度，進而使對應連結在第二架體30上端的椅 背13可調整呈一傾斜角度，及一高低控制機構22供可調 整椅座的高低位置。 該第二架體30其前端係與第一架體20對應樞接結 合，其後端與辦公椅椅背鎖固結合，且在其底部設有一 彈性裝置14 (如圖6〜10所示）如摔簧供可調整椅背傾 斜時的支撐強度，其進一步可設有一椅背深度調整機構 60供可將椅背向斜後方移動，該椅背深度調整機構60， 6 1359000 100年12月14日修(委)正替換頁 - 係由一上殼體與一下殼體組合形成的殼體結構，其頂面 61上設有複數個齒排結構62及複數個擂止面63，並藉由 設置在第二架體3 0上之一行程控制裝置6 4以控制椅背深 度調整機構60之移動位置；本實施例之行程控制裝置64 主要包含一第二調整桿65、複數個定位環66及複數個凸 輪67，其中，該第二調整桿65係套設複數個定位環66及 複數個凸輪67，其穿設在第二架體30之第二開孔33内， 並使複數個定位環66及複數個凸輪67藉由第二架體30上 之複數個第三開孔34對應穿過，且使該複數個定位環66 • 與齒排結構62之凹槽處對應活動卡合，將椅背深度調整 機構60調整至適當位置處，轉動該第二調整桿65並同步 帶動複數個凸輪67轉動，而使其凸輪面相對抵緊在擋止 面63上並對椅背深度調整機構60產生一固定定位效果。 該第二行程調整機構40係設置在第一架體20及第二 架體30之間，供可在第一行程調整機構21改變椅背13的 傾斜位置後，可使椅背13再傾斜一角度範圍如10度，本 實施例之第二行程調整機構40可包含一栓銷41，該栓銷 41包含一内側端411及一外側端412，其係穿過第一架 體20之第一開孔23及第二架體30上相對應之左/右兩栓 * 孔31a、31b，該栓銷41之一内側端411向外連接一把 柄42，該栓銷41上套.設一彈性件43如彈簧並藉由一擋止 塊44將彈性件43限制在一適當位置處，又該栓銷41配合 第二架體30之栓孔31a設有一可在該栓孔31a内隨栓銷 41移動的凸柱45，又該把柄42上連結設有一導銷46對應 並穿過第一架體20之導孔32，使該導銷46可在該導孔32 内來回移動；藉此，當把柄42向外拉開而帶動栓銷41向 外移動且同步帶動凸柱45向外移動並脫離第二架體30之 栓孔31a，同時栓銷41之外側端412脫離第二架體30之 栓孔31b，使第二架體30從第一行程之傾斜角度再向後 7 1359000 ⑽年12月14日修(要)正替換頁 可再傾斜一角度範圍如1〇度而達成第二行程的傾斜效 ，，又該第二行程可藉由該彈性裝置(如圖6〜 不）之彈簧彈性自動回復，也就是使椅背可由 位置自動回復至第一行程的位置，達成辦公椅椅 兩打程分次調整傾斜角度之安全效果。 下所Γ該椅f深度調整機構6G，在其上、 強度，且在固定件68之-側面:以 固件穿過該鎖固孔與辦公椅椅㈣鎖固結合（圖 調整以上=用^發;:=行程椅背仰躺 構1安裝在辦公=丄=== 確椅椅座10相對“ ^ 調整機構ί之使:雙行程椅背仰躺 機構!安裝在辦面=仃3背==整 f椅椅座相對椅背13呈:第—行程以= 調整機構;之使;^ 椅雙：程椅背仰躺 =1安裝在辦公椅座“底面=仃^仰=整 皆3向後傾斜一角度A，進一步在第-杆士^時椅At present, in addition to the basic seating function, the need for the reclining function is increasing. For a worker who is sitting on an office chair for a long time, such as a computer user, an office chair has been As a work chair, a rest chair or a leisure chair for multi-purpose use, the angle adjustment range of the back of the office chair must conform to the above-mentioned multi-purpose function; in addition, most of the conventional chair back tilt adjustment mechanisms belong to a single type. The adjustment mechanism of the stroke 'that is, by the single-stroke adjustment mechanism, the operation of the first stroke is the same as the angle of the stroke of the stroke, such as tilting backwards to the degree of addition for the Ϊί:; lying posture for shallow rest' and the second stroke The angle of inclination is as follows: = 20 degrees of inclination of the moon, and then tilted backwards by an appropriate angle. The step can be adjusted to a depth of 3 degrees after the depth of the reclining posture; however, the single stroke adjustment described above When the organization is in use, the rider must control himself to select the 4 135,000, December 14, 100, repair (US) replacement page. The tilt angle of the back of the chair, because the base of the general office chair is provided with a roller for sliding displacement on the ground, when the seater is operating the single-stroke adjustment mechanism, it is easy to directly recline back to the second stroke due to personal negligence or loss of control. The inclination angle, that is, the inclination angle of the seat back over the first stroke by about 20 degrees to the backward adjustment angle to about 30 degrees, at which time the backward reclining angle is too large, and the risk of backward tilting is easy to occur; The two-stroke split adjustment is used to respectively control the tilt angle of the backrest of the first stroke and the second stroke, thereby achieving the safety effect of adjusting the tilt angle of the office chair back by two strokes, thereby improving the use efficiency of the office chair. The main purpose of the present invention is to provide a double-stroke backrest reclining adjustment mechanism for an office chair, comprising: a first frame body, the top surface of which is locked at the bottom surface of the office chair, and the bottom surface thereof is connected The support leg has a rear end correspondingly pivotally coupled with a second frame body, and a first stroke adjustment mechanism is provided therein for adjusting the tilt position of the seat back, and a seat height control mechanism is provided for adjusting the height of the seat Position; a second frame, the front end of which is pivotally coupled with the first frame body, the rear end of which is coupled with the back of the office chair back, and an elastic device is provided at the bottom thereof for strong support when the seat back is tilted And a second stroke adjustment mechanism disposed between the first frame and the second frame for allowing the back of the seat to be tilted by an angle after the first stroke mechanism changes the inclined position of the seat back a range; wherein when the occupant operates the first stroke adjustment mechanism to tilt the seat back rearward at an appropriate angle for the occupant to lie on, the occupant may further operate the second stroke adjustment mechanism to cause the oblique angle from the first stroke Tilt angle Again after a proper tilt angle of the tilt angle into a second stroke and reached the back office chair with two stroke graded safety effect of the tilt angle adjustment. A further object of the present invention is to provide a double-stroke back reclining adjustment mechanism for an office chair, wherein the second frame body can further be provided with a seat back depth adjusting mechanism, which comprises a casing structure on which a plurality of 5 1359000 On December 14, 100, repair (being) is replacing the page ^ tooth row structure and a plurality of stop faces, and is provided by a plurality of positioning rings disposed in one of the stroke control devices on the second frame Correspondingly engaging with the groove of the tooth row structure, and a plurality of cams for forming a fixed positioning effect on the back depth adjustment mechanism with the pressing stop surface; thereby, the back of the seat can be inclined obliquely as needed Move to enhance the comfort of the rider. [Embodiment] In order to make the present invention more clear and detailed, the structure and technical features of the present invention are described in detail below with reference to the following drawings: ^ Referring to Figures 1 to 4, respectively The present invention is a three-dimensional schematic diagram, a three-dimensional combination diagram, a partial enlarged view of a three-dimensional combination and a three-dimensional exploded schematic view of an embodiment of the double-stroke backrest reclining adjustment mechanism of the office chair of the present invention. The double-stroke backrest reclining adjustment mechanism 1 of the present invention is mounted on the bottom surface 11 of the office chair 10, and one end thereof is lockedly coupled with the seat back 13 and includes: a first frame 20 and a second frame The body 30 and a second stroke adjustment mechanism 40 ° The top surface of the first frame body 20 is locked and coupled with the bottom surface 11 of the office chair 10 by a lock, and the bottom surface of the body frame 10 is coupled to a support stand 12 by a pivot The shaft 50 passes through the first frame body 20 and the second frame body 30 to be pivotally coupled. The first frame body 20 is provided with a first stroke adjustment mechanism 21 and can be second by operating the first adjustment rod 211. The frame body 30 is pivoted by an appropriate angle such as 22 degrees with the pivot 50 as an axis, so that the seat back 13 correspondingly coupled to the upper end of the second frame body 30 can be adjusted at an oblique angle, and a height control mechanism 22 can be adjusted. The height of the seat. The front end of the second frame body 30 is pivotally coupled to the first frame body 20, and the rear end of the second frame body 30 is pivotally coupled to the back of the office chair, and a resilient device 14 is disposed at the bottom thereof (as shown in FIGS. 6-10). If the spring is for adjusting the support strength when the seat back is inclined, the seat back depth adjustment mechanism 60 may further be provided for moving the back of the seat back obliquely. The back depth adjustment mechanism 60, 6 1359000 December 14 The repairing page is a housing structure formed by a combination of an upper casing and a lower casing, and the top surface 61 is provided with a plurality of tooth row structures 62 and a plurality of damming surfaces 63, and The stroke control device 64 is disposed on the second frame 30 to control the movement position of the seatback depth adjustment mechanism 60. The stroke control device 64 of the embodiment mainly includes a second adjustment rod 65 and a plurality of positioning rings 66. And a plurality of cams 67, wherein the second adjusting rods 65 are sleeved with a plurality of positioning rings 66 and a plurality of cams 67, which are disposed in the second opening 33 of the second frame body 30, and have a plurality of positioning positions The ring 66 and the plurality of cams 67 are correspondingly worn by the plurality of third openings 34 on the second frame 30. And the plurality of positioning rings 66 are engaged with the corresponding activities of the grooves of the tooth row structure 62 to adjust the seat back depth adjusting mechanism 60 to an appropriate position, rotate the second adjusting rod 65 and simultaneously drive the plurality of cams 67 rotates with its cam surface relatively against the stop surface 63 and produces a fixed positioning effect for the seat back depth adjustment mechanism 60. The second stroke adjustment mechanism 40 is disposed between the first frame body 20 and the second frame body 30, so that the seat back 13 can be tilted again after the first stroke adjustment mechanism 21 changes the inclined position of the seat back 13. The angle range is 10 degrees. The second stroke adjustment mechanism 40 of the embodiment may include a pin 41. The pin 41 includes an inner end 411 and an outer end 412 which are first through the first frame 20. The opening 23 and the corresponding left/right two holes * 31a, 31b of the second frame 30, the inner end 411 of the pin 41 is outwardly connected to a handle 42, and the pin 41 is sleeved. The member 43 is like a spring and is restrained in a proper position by a stopper 44, and the pin 41 is fitted with the bolt hole 31a of the second frame 30 to be provided with a pin in the bolt hole 31a. The moving protrusion 45 is coupled to a guide pin 46 and passes through the guide hole 32 of the first frame 20 so that the guide pin 46 can move back and forth in the guide hole 32; thereby, When the handle 42 is pulled outward, the pin 41 is moved outwardly and the rod 45 is synchronously moved outwardly and disengages from the bolt hole 31a of the second frame 30, while the outer side of the pin 41 The 412 is disengaged from the bolt hole 31b of the second frame body 30, so that the second frame body 30 is further tilted from the first stroke angle to the rear side of 7 1359000 (10). The replacement page can be re-tilted by an angle range such as 1 The tilting effect of the second stroke is achieved, and the second stroke can be automatically restored by the spring elasticity of the elastic device (as shown in FIG. 6 to No), that is, the seat back can be automatically returned to the first stroke by the position. Position, to achieve the safety effect of adjusting the tilt angle in two steps of the office chair and chair. The chair f depth adjustment mechanism 6G is placed thereon, and the strength is applied to the side of the fixing member 68: the fastener is inserted through the locking hole and the office chair (four) is locked and fixed (the figure is adjusted above = with ^ hair) ;:=Travel chair back reclining structure 1 installed in the office = 丄 === Make sure the seat 10 is relative to the " ^ adjustment mechanism ί :: double-stroke chair back reclining mechanism! installed in the office = 仃 3 back == The whole f chair seat is opposite to the seat back 13: the first stroke is the adjustment mechanism; the seat is double; the chair is double: the seat back is lying on the back = 1 is installed in the office chair "bottom = 仃 ^ 仰 = whole 3 backwards An angle A, further in the first - rods ^ time chair
斜傾角度從第-行程之傾斜角度使椅背13 位置。 对月度A再向後傾斜一角度B ，尊9所* ’其係本發明辦公椅雙行㈣此彻处 機構1之又-使用狀態圖。當坐者：t 分別控制第-行程與第二行程，辦4=相欠 8 uuu 100年12月14日修(要)正替換頁 第二正確的角度位置，藉以避免習知 ΐ斜稭…人操作即可達成第—行程及第二行程 達危險性如後躺角度過大而向後翻倒， 果。a椅椅月13以兩仃程分次調整傾斜角度之安全效 仰躺=;=使;椅椅背 =1安裝在辦公椅座‘面t仃;= 奇13鎖固結合，藉由調整一 二 冗^後:移動之== = = = = K :可;去:增加辦公椅的乘坐或仰躺 進坐者的型較大者或以仰躺方式的坐者，以增 僅是僅為本發㈣較佳實施例，對本發明而言 可對其進行許 護範圍内。 纟4效變更，但都將洛入本發明的保 【圖 圖1 圖2 圖3 圖4 圖5 圖6 圖7 圖8 圖 式簡單說明】 明—實施例安裝在辦公椅上立體示意圖。 係本發明一立體組合圖示意圖。 係圖2之局部放大示意圖。 係本發明一立體分解示意圖。 ^本發明之椅背深度調整機構之立體分解示意圖 係本發明之一使用狀態示意圖。 明之再一使用狀態（第一行程）示意圖。 在士ί明之另一使用狀態（第二行程）示意圖。 ，、發明之又一使用狀態（坐者呈躺仰）示意圖 1359000 100年12月14日修(美)正替換頁 圖10係本發明之椅背深度調整機構之使用狀態示意圖。 圖11係本發明之椅背深度調整機構之又一使用狀態示意 圖。The reclining angle positions the seat back 13 from the angle of inclination of the first stroke. For the monthly A, it is tilted back by an angle B, and the 9th* ’ is the double row of the office chair of the present invention (4). When the seater: t controls the first-stroke and the second stroke respectively, do 4 = owe 8 uuu 100 years of December 14th repair (to) replace the page with the second correct angular position, in order to avoid the slanting straw... The human operation can achieve the first stroke and the second stroke to reach the danger, such as the back lie angle is too large and fall backwards, fruit. a chair chair month 13 with two strokes to adjust the safety angle of the tilt angle = lie =; make; seat back = 1 installed in the office chair 'face t仃; = odd 13 lock combination, by adjusting one Second redundancy ^ After: Mobile == = = = = K : Yes; Go: increase the size of the office chair or sit back into the seater or the seater in the reclining mode, to increase only The preferred embodiment of the present invention is within the scope of the invention.纟4 effect change, but will be in the protection of the invention [Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 diagram simple description] Ming - the embodiment is installed on the office chair stereoscopic diagram. A schematic diagram of a three-dimensional combination of the present invention. Figure 2 is a partial enlarged view of the figure. A perspective exploded view of the present invention. The perspective exploded view of the seat back depth adjusting mechanism of the present invention is a schematic diagram of the state of use of one of the present inventions. A schematic diagram of the state of use (first stroke) of the other. A schematic diagram of another use state (second stroke) in Shih-Ming. Fig. 10 is a schematic view showing the state of use of the seat back depth adjusting mechanism of the present invention. Fig. 10 is a schematic view showing the state of use of the seat back depth adjusting mechanism of the present invention. Fig. 11 is a view showing still another state of use of the seat back depth adjusting mechanism of the present invention.
【主要元件符號說明】 雙行程椅背仰躺調整機構1 辦公椅座10 底面11 支撐腳架12 椅背13 彈性裝置14 第一架體20 第一行程調整機構21 第一調整桿211 高低控制機構22 第一開孔23 第二架體30 栓孔31a 栓孔31b 導孔32 第二開孔33 第三開孔34 第二行程調整機構40 栓銷41 内側端411 外侧端412 把柄42 彈性件43 擋止塊44 凸柱45 導銷46 樞轴50 椅背深度調整機構60 頂面61 齒排結構62 撞止面63 行程控制裝置64 第二調整桿65 定位環66 凸輪67 固定件68[Description of main components] Double-stroke back-back adjustment mechanism 1 Office seat 10 Underside 11 Supporting stand 12 Back 13 Elastic device 14 First frame 20 First stroke adjustment mechanism 21 First adjustment lever 211 High and low control mechanism 22 first opening 23 second frame 30 bolt hole 31a bolt hole 31b guide hole 32 second opening 33 third opening 34 second stroke adjusting mechanism 40 pin 41 inner end 411 outer end 412 handle 42 elastic member 43 Stop block 44 Stud 45 Guide pin 46 Pivot 50 Back depth adjustment mechanism 60 Top surface 61 Tooth row structure 62 Impact surface 63 Stroke control device 64 Second adjustment lever 65 Positioning ring 66 Cam 67 Fixing member 68