Knee-control presser foot lifting device of sewing machine

Abstract

The invention belongs to the technical field of sewing machines, and particularly relates to a knee-control presser foot lifting device of a sewing machine. The knee-control presser foot lifting device of the sewing machine comprises an oil box which is fixed on the base plane of a base plate. A presser foot lifting device which is connected with a presser foot mechanism and used for driving the presser foot mechanism to make presser foot lifting movement is arranged on a box body of the oil box. The presser foot lifting device is connected with a knee-control mechanism, the knee-control mechanism drives the presser foot lifting device to move so that the presser foot lifting movement can be achieved, and the knee-control mechanism and the presser foot lifting device are detachably connected. According to the knee-control presser foot lifting device of the sewing machine, the size of the oil box used for storing lubricating oil is small, the oil box is airtightly fixed on the base plate of the sewing machine, so that the lubricating oil is isolated inside the machine, the lubricating oil cannot leak or overflow along with overturning of the base plate, hence, lubricating oil pollution can be prevented, and the phenomenon that the lubricating oil overflows to pollute sewing cloth can be avoided; due to the fact that the knee-control mechanism and the presser foot lifting device are detachably connected, the presser foot lifting device is arranged on an oil receiver, when the machine is carried and overturned or knee-control presser foot lifting is of no need, a knee-control wrench can be dismounted, and thus the device can be used conveniently.

Description

Technical field: [0001] The invention belongs to the technical field of sewing machines, in particular to a knee-controlled presser foot lifting device for sewing machines. Background technique: [0002] At present, the oil pan of the lockstitch sewing machine is arranged below the base plate, and a knee-controlled presser foot lifting mechanism is installed below the oil pan. The device oil pan needs to catch the whole base plate, so the volume is relatively large, and the oil pan is provided with an oil pan mounting position on the platen, and the oil pan is fixed in the oil pan mounting position on the platen. The oil pan is separable from the machine. When the machine is turned up, the oil pan and its internal lubricating oil are exposed, which affects the appearance and is prone to pollution caused by cloth falling, which in turn pollutes the entire oil circuit. At the same time, it will also cause lubricating oil to overflow, pollute the sewing cloth, and cause unnece...

AI Technical Summary

Problems solved by technology

The oil pan is separable from the machine. When the machine is turned up, the oil pan and its internal lubricating oil are exposed, which affects the appearance and is prone to contamination caused by cloth falling, which in turn pollutes the entire oil circuit.

At the same time, it will also cause lubricating oil to overflow, pollute the sewing fabric, and cause unnecessary losses

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