CN-224227391-U - Presser foot control device

Abstract

The utility model belongs to the technical field of sewing machine, a presser foot control device is disclosed, which comprises a motor, and the periphery is provided with a connecting and fixing part; one end of the track cam is fixedly connected with the rotating shaft of the motor; one end of the presser foot driving lever is hinged with the connecting and fixing component, and the other end of the presser foot driving lever is provided with a roller; one end of the connecting rod transmission structure is hinged with the presser foot driving lever; the front lever of the presser foot is hinged with one end of the connecting rod transmission structure; the periphery of the compression bar is sleeved with a compression bar guide sleeve hinged with a front lever for lifting the presser foot; the periphery of the compression bar is sleeved with a pressure regulating spring and a compression bar guide frame; the presser foot structure is arranged at the bottom end of the pressing rod. The utility model discloses a motor is as the power supply that promotes the presser foot, and it is big to solve the automatic common noise that lifts the presser foot that adopts the electro-magnet as the power supply, lifts the presser foot decline speed and damage the seam material too fast, automatic lift the defect such as presser foot height unadjustable.

Inventors

• FANG SHENGHUA
• BI JINLIANG

Assignees

• 上海富山精密机械科技有限公司

Dates

Publication Date

20260512

Application Date

20250528

Claims (5)

1. 1. A presser foot control device is characterized by comprising, The periphery of the motor is provided with a connecting and fixing part; one end of the track cam is fixedly connected with the rotating shaft of the motor, and a track is formed on the surface of the track cam; One end of the presser foot driving lever is hinged with the connecting and fixing part, and the other end of the presser foot driving lever is provided with a roller which is arranged in a track of the track cam; one end of the connecting rod transmission structure is hinged with the presser foot driving lever; The front lever of the presser foot is hinged with the other end of the connecting rod transmission structure; The periphery of the compression bar is sleeved with a compression bar guide sleeve hinged with a front lever for lifting the presser foot; the periphery of the compression bar is sleeved with a pressure regulating spring and a compression bar guide frame, one end of the pressure regulating spring is fixed with the pressure lever guide sleeve, the other end is fixed with the compression bar guide frame; the presser foot structure is arranged at the bottom end of the pressure bar; The motor rotates forwards or reversely, and applies acting force to the presser foot structure through the presser foot driving lever and the connecting rod transmission structure to drive the presser foot structure to lift or drop.
2. 2. The presser foot control device as claimed in claim 1, wherein the link transmission structure includes a post-presser bar link having one end hinged to the presser foot drive lever, the other end of the post-presser bar link being hinged to a post-presser bar-lifting lever, the other end of the post-presser bar-lifting lever being hinged to a presser bar-lifting link, the other end of the presser bar-lifting link being hinged to one end of the presser bar-lifting front lever.
3. 3. The presser foot control device of claim 1, wherein the top end of the presser bar is provided with a presser foot pre-compression spring, a presser bar upper cap and a presser bar upper cap in sequence from top to bottom, and a space is provided between the presser bar upper cap and the presser bar guide sleeve.
4. 4. The presser foot control device of claim 1 wherein the presser foot structure is a movable presser foot handle and a movable presser foot base plate which are hinged and then connected with the bottom end of the pressure bar.
5. 5. A presser foot control device as claimed in claim 3, characterised in that the outer periphery of the presser bar is provided with a presser foot lifting bracket, the presser foot lifting bracket is located at the interval between the upper sleeve of the presser bar and the guide sleeve of the presser bar, the presser foot lifting bracket is connected with a manual presser foot lifting ejector rod, and one end of the manual presser foot lifting ejector rod far from the presser bar is provided with a manual presser foot lifting cam and a presser foot spanner connected with the manual presser foot lifting cam.

Description

Presser foot control device Technical Field The utility model belongs to the technical field of sewing machines, and particularly relates to a presser foot control device. Background The existing sewing machine mostly adopts an electromagnet as a power source, lifts the presser foot through the telescopic drive of an electromagnet core, and adopts the electromagnet as the power source to automatically lift the presser foot, and has the defects of large noise, excessively high falling speed of the presser foot to damage sewing materials and unadjustable height of the presser foot. Moreover, the knee control foot lifting device is of a machine type, the moment is large, and the operation of operators is laborious. The existing sewing machine also adopts a motor as a power source, but only realizes the action of lifting the presser foot, and cannot realize the lower presser foot. Disclosure of utility model The present utility model has been made to solve the above-mentioned problems, and an object of the present utility model is to provide a presser foot control device. In order to achieve the aim, the utility model provides the technical scheme that the presser foot control device comprises a motor, a connecting and fixing component is arranged on the periphery of the motor; one end of the track cam is fixedly connected with the rotating shaft of the motor, and a track is formed on the surface of the track cam; One end of the presser foot driving lever is hinged with the connecting and fixing part, and the other end of the presser foot driving lever is provided with a roller which is arranged in a track of the track cam; one end of the connecting rod transmission structure is hinged with the presser foot driving lever; The front lever of the presser foot is hinged with the other end of the connecting rod transmission structure; The periphery of the compression bar is sleeved with a compression bar guide sleeve hinged with a front lever for lifting the presser foot; the periphery of the compression bar is sleeved with a pressure regulating spring and a compression bar guide frame, one end of the pressure regulating spring is fixed with the pressure lever guide sleeve, the other end is fixed with the compression bar guide frame; the presser foot structure is arranged at the bottom end of the pressure bar; The motor rotates forwards or reversely, and applies acting force to the presser foot structure through the presser foot driving lever and the connecting rod transmission structure to drive the presser foot structure to lift or drop. According to the utility model, the connecting rod transmission structure further comprises a post-lifting lever connecting rod, one end of the post-lifting lever connecting rod is hinged with the presser foot driving lever, the other end of the post-lifting lever connecting rod is hinged with a post-lifting presser foot lever, the other end of the post-lifting presser foot lever is hinged with a presser foot lifting connecting rod, and the other end of the presser foot lifting connecting rod is hinged with one end of a front presser foot lifting lever. According to the utility model, the top end of the pressure bar is further provided with the presser foot pre-compression spring, the pressure bar upper sleeve cap and the pressure bar upper sleeve in sequence from top to bottom, and a space is reserved between the pressure bar upper sleeve and the pressure bar guide sleeve. According to the utility model, the presser foot structure is characterized in that the movable presser foot handle and the movable presser foot bottom plate are hinged and then connected with the bottom end of the pressure bar. According to the utility model, the outer periphery of the pressure bar is provided with the presser foot lifting bracket, the presser foot lifting bracket is positioned at the interval between the upper sleeve of the pressure bar and the guide sleeve of the pressure bar, the presser foot lifting bracket is connected with the manual presser foot lifting ejector rod, and one end of the manual presser foot lifting ejector rod, which is far away from the pressure bar, is provided with the manual presser foot lifting cam and the presser foot spanner connected with the manual presser foot lifting cam. Compared with the prior art, the automatic presser foot lifting device has the beneficial effects that the motor is adopted as a power source for lifting the presser foot, which is different from the common electromagnet in the prior market, so as to solve the defects of high noise, excessively high descending speed of the automatic presser foot lifting device, damage to the stitching material, unadjustable automatic presser foot lifting height and the like which are common in the automatic presser foot lifting device adopting the electromagnet as the power source. Compared with the prior art adopting a motor as a power source, the structure of the utility model is provided with the pre-tighte