External hanging elastic band zigzag seam driving device for sewing machine

Abstract

The invention provides an external hanging elastic band zigzag seam driving device for a sewing machine. The driving device comprises a first gear, a fixed seat, an eccentric wheel, a second gear, a swing arm, a connecting rod, a rubber threading frame and an actuating assembly, wherein the fixed seat is installed opposite to one lateral side of the first gear, and is provided with an axle hole and a communication hole; the eccentric wheel penetrates through the axle hole; the second gear is sleeved on the eccentric wheel and carries out meshing transmission with the first gear; the swing arm is pivoted in the communication hole in a penetration mode; the two ends of the connecting rod are respectively connected with the swing arm and the eccentric wheel; the actuating assembly is connected with the swing arm and the rubber threading frame; the connecting rod is driven by the eccentric wheel to drive the swing arm to swing; and the actuating assembly is driven by the swing arm to ensure the rubber threading frame to reciprocate. According to the invention, the installation easiness and maintenance convenience of the driving device can be improved.

Description

Technical field [0001] The invention relates to a zigzag seam driving device, in particular to an externally hung elastic belt zigzag seam driving device for a sewing machine. Background technique [0002] Existing sewing machines for sewing rubber threads have many advantages such as fast sewing, uniform shrinkage and beautiful appearance, and have been widely adopted by the clothing industry; however, sewing machine manufacturers have developed a patent for inventions like Taiwan, China in response to market needs. The sewing machine for rubber thread of Announcement No. TW562885 has a zigzag seam driving device disclosed in the eighth figure, which is hidden inside the machine base of the sewing machine and covered with an arched cover on the sewing platform of the machine base. This zigzag seam drive device mainly uses a worm and worm gear set to connect with the main shaft of the sewing machine and a vertical shaft, and is connected to one end of the connecting rod through t...

AI Technical Summary

Problems solved by technology

[0003] However, although the zigzag seam driving device of the existing sewing machine has the ability to overcome the uneven tension of the rubber threads, when the rubber threads are sewn on the cloth, the elastic elastic parts of the cloth can still be arranged in a regular shape.

However, the zigzag seam driving device is hidden inside the sewing machine base, which is not only very cumbersome and inconvenient in the assembly process of the new machine, but also requires a lot of effort to disassemble and assemble the relevant components in the repair process of the damaged sewing machine. , not economical

In addition, the zigzag driving device is integrated with the sewing machine, so that the sewing machine can only do single-function sewing

In addition, the sewing platform of the machine base is covered with an arched cover plate, so that the limited use space of the sewing person is greatly reduced, and the inconvenience in the sewing operation is only increased.

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