In general, an intermittent forward pushing and backward pulling mechanism is unable to perform a whole circle movement due to the problems of the mechanism itself or the site. Theoretically, it is further required to provide a driving function in backward pulling. However, the existent rocker wheelchair is only provided with a forward pushing power, and thus is idle to return in backward pulling, resulting in discontinuous force application and inefficient operation. The patent application number 104110374 filed on March 31, 2015 discloses the use of one rocker to drive two linkage rods and to further drive two ratchets for converting the backward pulling to the driving of forward pushing, so as to alternate with the front driving of forward pushing to form a whole circle driving thereby solving the problem. However, the design of the switch, ratchets and gearbox is not satisfactory and needs to be improved. In addition to provision of improvement, the present invention also provides a planetary gear scheme, in which a rocker is provided with a positive rotation driving mechanism at one side and a planetary gear mechanism at the other side, and a reverse rotation driving mechanism is provided for converting the backward pulling to forward pushing through two ratchets.間歇性前推與後拉驅動機構,往往都是機構本身或場所問題,致無法作全圓周之動作;按理,應該更需要後拉也具驅動功效,現行搖桿輪椅,卻皆僅前推有動力,後拉空轉而回,形成力道不繼與事倍功半;104年3月31日申請日,第104110374號發明申請案,以一搖桿帶動兩連桿,並帶動雙棘輪,使拉回變為前推之驅動,與前推的前驅交替成為全圓周驅動,旨在解決此問題,但在切換器、棘輪與變速器之設計,具有改善之空間;本發明除了提出改善外,另提出行星齒輪方式,以一搖桿一側是正轉驅動機構,另側是行星齒輪機構,將拉回轉為前推之反轉驅動機構,仍是透過雙棘輪。43‧‧‧受動體60‧‧‧行星搖桿61‧‧‧圓槽透孔62‧‧‧弧齒槽62-1‧‧‧第一弧齒63‧‧‧行星齒輪63-1‧‧‧行星架63-2‧‧‧非圓體64‧‧‧太陽齒輪65-1‧‧‧第二弧齒65-2‧‧‧第二棘爪裝置槽66‧‧‧第一棘爪裝置槽67‧‧‧第二搖桿68‧‧‧嵌合孔
