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A picking ladder cart with a synchronized brake is provided, which includes a frame, a plurality of wheels, a ladder, and a stopper. The ladder is pivotally connected to a side of the frame, wherein the ladder is pivotally movable between a first position and a second position. The ladder includes t

A picking ladder cart with a synchronized brake is provided, which includes a frame, a plurality of wheels, a ladder, and a stopper. The ladder is pivotally connected to a side of the frame, wherein the ladder is pivotally movable between a first position and a second position. The ladder includes two side rails and a plurality of steps, which are connected between the two side rails. The stopper has a first end and, a second end. When the ladder is moved to the second position, one of the plurality of steps, which is arranged at the lowest position among the steps, abuts against the second end of the stopper, which causes the stopper to contact one of the wheels. When an operator steps on the ladder of the picking ladder cart, the lowest step drives the stopper to abut against one of the wheels.

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1. A picking ladder cart, comprising: a frame;a plurality of wheels installed at a bottom of the frame, which allows the picking ladder cart to be moved on a flat surface;a ladder pivotally connected to a side of the frame, wherein the ladder is pivotally movable between a first position and a secon

1. A picking ladder cart, comprising: a frame;a plurality of wheels installed at a bottom of the frame, which allows the picking ladder cart to be moved on a flat surface;a ladder pivotally connected to a side of the frame, wherein the ladder is pivotally movable between a first position and a second position, and comprises of two side rails and a plurality of steps which are connected between the two side rails; the two side rails are adjacent to the frame when the ladder is moved to the first position; the two side rails are moved away from the frame when the ladder is moved to the second position; one of the plurality of steps, which is arranged at a lowest location among the plurality of steps is defined as a lowest step closest to the plurality of wheels;a stopper provided at the bottom of the frame, which has a first end and a second end, wherein the first end is connected to the bottom of the frame, and the second end is adjacent to the ladder;wherein the lowest step abuts against the second end of the stopper when the ladder is moved to the second position, which causes a middle part of the stopper to contact one of the plurality of wheels; andthe lowest step remains abutting against the second end when the ladder is in the second position, which prevents movement of the picking ladder cart along the flat surface. 2. The picking ladder cart of claim 1, wherein at least one of the steps has a first pivoted end, a second pivoted end, and an upper surface; the first pivoted end is pivotally connected to the side of the frame, and the second pivoted end is pivotally connected to one of the side rails; when the ladder is moved to the first position, an angle is formed between an extension direction of the upper surface and the flat surface; when the ladder is moved to the second position, the upper surface is substantially parallel to the flat surface. 3. The picking ladder cart of claim 1, wherein the lowest step is fixed to the two side rails, and has an upper surface; when the ladder is moved to the second position, the upper surface is substantially parallel to the flat surface. 4. The picking ladder cart of claim 1, further comprising a flexible member provide at the bottom of the frame, which gives an upward force to the stopper, wherein when the ladder is moved to the first position, the stopper has no contact with the lowest step and the plurality of wheels. 5. The picking ladder cart of claim 4, further comprising two shaft tubes, a sleeve, and a shaft, wherein the two shaft tubes are fixed to the bottom of the frame, and are separated from each other; the sleeve is provided between the two shaft tubes, and the shaft passes through the two shaft tubes and the sleeve; the stopper is fixed to an outer surface of the sleeve with the first end thereof, and is pivotable on the shaft; the flexible member comprises a torsion spring, which is supported by the two shaft tubes, and provides the upward force to the stopper.