Refrigerator

A refrigerator, comprising a main door, an opening is formed on a door body of the main door;

• a guide rail is provided at an edge of the opening, and a secondary door is fitted on the guide rail;
• and the secondary door is connected with a driving mechanism which can drive the secondary door to slide along the guide rail to enclose or open the opening;
• wherein, the driving mechanism comprises a motor and a transmission assembly;
• an output shaft of the motor is connected to the transmission assembly, and the transmission assembly is connected to the secondary door;
• and the transmission assembly can transform a rotary motion of the motor output shaft to a linear motion to drive the secondary door to slide along the guide rail;
• wherein, the transmission assembly comprises a first gear, a first connecting rod and a second connecting rod;
• the first connecting rod is connected to the door body of the main door by a first shaft, and the first connecting rod is rotatable about the first shaft;
• the second connecting rod is hinged with the first connecting rod by a second shaft;
• the first gear is fixed onto the output shaft of the motor;
• one end of the first connecting rod is a gear structure, and the opposite end thereof is connected with a first guide pin;
• the gear structure is engaged with the first gear;
• a first chute perpendicular to the guide rail is provided on one side of the secondary door close to the driving mechanism, and the first guide pin is fitted inside the first chute;
• one end of the second connecting rod is connected with a second guide pin and another end thereof is connected with a third guide pin, and the second guide pin is fitted inside the first chute;
• and a second chute perpendicular to the guide rail is provided on the door body of the main door, and the third guide pin is fitted inside the second chute.