Press-fit extendable support rod

A press-fit extendable support rod, comprising:

• a support rod, composed of an outer pipe and an inner pipe slidably sheathed along the outer pipe, and a containing space being formed between the outer pipe and the inner pipe, and the inner pipe having a fixing portion disposed inside the containing space, and a rope having an end fixed to the fixing portion and another end passed through the containing space and extended towards an external side of the support rod, and a supporting portion being disposed individually at both ends of the support rod;
• a press-fit buckle device, sheathed to a joint position of the outer pipe and the inner pipe, and having two opposite sidewalls, and a rotary arm installed between the two sidewalls, and the rotary arm having a pivotal connecting end and a turning end disposed opposite to the pivotal connecting end, and the pivotal connecting end including a first operating portion, a second operating portion and a third operating portion, and the rotary arm being pivotally coupled between the two sidewalls by using one of the operating portions as an axis, and having a gap between the second operating portion and the third operating portion, and another end of the rope being wound onto the first operating portion and the second operating portion and then passed through the gap between the second operating portion and the third operating portion, such that when the rotary arm is turned, the rope is pulled, turned around, and pressed at each operating portion to fix the inner pipe at a corresponding position of the outer pipe.