Abstract: A portable device for controlling an external electrical adjustable apparatus is provided. The portable device has a case, a signal transmitter connected to the electrical adjustable apparatus, a tilt sensor sensing a tilted angle and a controlling operation, a memory storing a threshold angle and a processor. The processor generates a controlling signal according to the controlling operation, and transmitting the controlling signal to an electrical adjustable apparatus for making the electrical adjustable apparatus raise/lower. The processor further determines that the electrical adjustable apparatus has collision when receiving a controlling signal used to control the electrical adjustable apparatus and the tilted angle is not less than the threshold angle, and sends a stopping signal to the electrical adjustable apparatus via the signal transmitter for making the electrical adjustable apparatus stop raising/lowering when determining that the electrical adjustable apparatus has collision.

Abstract: A reciprocating linear pushrod includes a base, a transmission mechanism and a moving mechanism. The transmission mechanism includes a motor and a rotary shaft, and the rotary shaft has a threaded portion including a left-handed thread groove and a right-handed thread groove crossed with each other, and both ends of the left-handed thread groove are communicated to both ends of the right-handed thread groove respectively. The moving mechanism includes a moving rod and a crescent member, and the moving rod has an axial hole and a radial hole and is sheathed on the rotary shaft by the axial hole, and the crescent member is accommodated in the radial hole and embedded into the threaded portion, so that the moving mechanism can be moved reciprocally according to the rotation of the rotary shaft, and this disclosure has the effects of reducing the total volume and simplifying the structure significantly.

Abstract: A portable device for controlling an external electrical adjustable apparatus is provided. The portable device comprises a case, a signal transmitter connected to the electrical adjustable apparatus, a tilt sensor sensing a tilted angle, a memory storing a threshold angle and a processor. The processor determines that the electrical adjustable apparatus has collision when receiving a controlling signal used to control the electrical adjustable apparatus and the tilted angle is not less than the threshold angle, and sends a stopping signal to the electrical adjustable apparatus via the signal transmitter for making the electrical adjustable apparatus stop raising/lowering when determining that the electrical adjustable apparatus has collision. This present disclosed example can effectively prevent article placing on the carrying structure from falling and prevent the electrical adjustable apparatus or the obstacle from being damaged by continual stretching/shortening after collision.