There is provided a back kneading device capable of causing a massage mechanism to protrude forward and return to an original normal position wherein there occurs no increase in size and complexity in construction. The back kneading device 4 mounted in a chair-type massage apparatus 1 comprises the massage mechanism 10 having a pair of right-hand and left-hand massage members 17, a base member 12 for pivotally supporting the mechanism 10 at its lower end, a vertical movement mechanism 13 for imparting a vertical motion to the base member 12, an advancing and retracting mechanism 14 for rockably driving massage mechanism 10, and a rock restricting mechanism 15 for an adjusting angle of rotation of the massage mechanism 10 so that, when the device is in an upper position, an upper end of the massage member 17 protrudes forward, whereas, in a lower position, a lower end thereof protrudes forward.一種能夠使按摩機構向前方突出或返回原來的通常位置的揉背裝置,能夠在不降低按摩效果的前提下迅速且以充分的動作量來完成前後動作,而且不會導致機構的大型化和複雜化。設置在本發明的椅型按摩機(1)上的揉背裝置(4)包括:具有左右一對按摩部件(17)的按摩機構(10);在下端側樞支該按摩機構(10)的基座部件(12);使基座部件(12)上下移動的上下移動機構(13);對按摩機構(10)進行擺動驅動的進退動作機構(14);以及以在上升位置時使按摩部件(17)的上端部向前方突出、在下降位置時使下端部向前方突出的方式來限制按摩機構(10)之轉動角的擺動限制機構(15)。4...揉背裝置10...按摩機構11...擺動樞支部13...上下移動機構14...進退動作機構15...擺動限制機構17...按摩部件20...支承臂21...按摩體21a...上方按摩體21b...下方按摩體28...防振機構36...連桿38...導向桿46...導軌47...升降馬達48...螺桿軸52...傳動臂53...軌道部66...側板部
