Plastic electric lift device

A plastic electric lift device, comprising:

• a seat assembly;
• a folding assembly;
• an electric push rod assembly;
• and
• a clamping assembly;
• wherein the seat assembly comprises a seat plate and a backrest;
• the backrest is rotatably connected to the seat plate;
• the folding assembly is configured to support the seat assembly;
• the electric push rod assembly comprises a main body and a push rod;
• the push rod is partially provided within the main body;
• the main body is provided at the backrest;
• the push rod is provided with a push rod head;
• the push rod head is removably provided at the folding assembly;
• the push rod is configured to extend and retract along an axial direction of the main body, such that the main body drives the folding assembly to become unfolded or folded, so as to drive the seat assembly to ascend or descend;
• and
• the clamping assembly is configured to limit the push rod head to the folding assembly or to release the push rod head from the folding assembly, so as to achieve a removable arrangement of the push rod head relative to the folding assembly;
• the folding assembly comprises a base plate and a crisscross arm mechanism;
• the crisscross arm mechanism is provided at the base plate;
• the crisscross arm mechanism is configured to support the seat plate;
• the clamping assembly comprises an extension part, a shaft rod, a clamping part, and a torsion spring;
• the extension part is provided at the base plate, and is provided with an arc-shaped slot:
• the shaft rod is configured to pass through the extension part;
• the clamping part is rotatably provided at the shaft rod;
• the torsion spring is sleeved on the shaft rod;
• a first end of the torsion spring is configured to abut against the base plate;
• a second end of the torsion spring is configured to abut against the clamping part;
• the arc-shaped slot is configured to accommodate the push rod head;
• and
• the clamping part is configured to limit the push rod head in the arc-shaped slot or release the push rod head from the arc-shaped slot.