Cable management device and coupling assembly for rack system

A coupling assembly, comprising:

• a first slide rail assembly comprising a first rail and a second rail, the first rail and the second rail being movable relative to each other;
• and
• a first cable management device, comprising:
• a first cable management arm;
• a second cable management arm pivotable relative to the first cable management arm;
• and
• an auxiliary member movable along a length direction of one of the first cable management arm and the second cable management arm;
• wherein the auxiliary member is configured to being connected to the first rail;
• wherein the other one of the first cable management arm and the second cable management arm is configured to being connected to the second rail;
• wherein when the auxiliary member is moved relative to the one of the first cable management arm and the second cable management arm, a length direction of the auxiliary member is parallel to the length direction of the one of the first cable management arm and the second cable management arm.

A cable management device, comprising:

• a first cable management arm;
• a second cable management arm movable relative to the first cable management arm;
• and
• an auxiliary member movable from a first position to a second position with respect to the first cable management arm, so as to increase a length of the cable management device;
• wherein when the auxiliary member is moved relative to the first cable management arm, a length direction of the auxiliary member is parallel to a length direction of the first cable management arm, and the auxiliary member is movable along the length direction of the first cable management arm.