Driving cam for sewing machine

Abstract

The utility model discloses a driving cam for sewing machine, including driving cam, driving cam includes line lifting part and lift press part, line lifting part is provided with mounting hole, line lifting part is provided with line lifting inclined plane, and lift press part includes lift press inclined plane one, lift press inclined plane two, lift press inclined plane three, realizes the rotation of one drive source through driving cam and realizes lift press foot, line lifting action, simple structure, convenient operation, improves overall adaptability, reduces cost simultaneously, and it is favorable to realize enterprise cost reduction and material reduction.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and specifically to a drive cam for a sewing machine. Background Technology

[0002] A sewing machine is a machine that uses sewing thread to create one or more stitches on a workpiece, allowing one or more layers of workpiece to be interwoven or sewn together.

[0003] Currently, sewing machines on the market require additional power sources for lifting the presser foot, thread lifting, and applying pressure, meaning that sewing machines need at least two power sources. This not only increases the manufacturing cost of sewing machines but also makes them more difficult to control. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a drive cam for sewing machines to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drive cam for a sewing machine, comprising a drive cam, the drive cam including a thread lifting part and a lifting and pressing part, the thread lifting part being provided with a mounting hole and a thread lifting inclined surface, the lifting and pressing part including a lifting and pressing inclined surface one, a lifting and pressing inclined surface two, and a lifting and pressing inclined surface three.

[0006] Furthermore, the lateral center distance L1 between the center of the first lifting and pressing slope and the mounting hole is 11mm~12mm, and the longitudinal center distance L2 between the center of the first lifting and pressing slope and the mounting hole is 2mm~3mm.

[0007] Furthermore, the longitudinal center distance L3 between the center of the second lifting slope and the mounting hole is 6.5mm~7.5mm.

[0008] Furthermore, the lateral center distance L4 between the center of the lifting and pressing inclined surface three and the mounting hole is 13.5mm~14.5mm, and the longitudinal center distance L5 between the center of the lifting and pressing inclined surface three and the mounting hole is 4.5mm~5.5mm.

[0009] Furthermore, the slope of the inclined plane is 0~18°.

[0010] Furthermore, the lifting angle of the lifting section is 0~30°.

[0011] The beneficial technical effects of this utility model are: by driving a cam to realize the rotation of a drive source to achieve the lifting of the presser foot and the lifting of the line, the structure is simple, the operation is convenient, the overall adaptability is improved, and the cost is reduced, which is conducive to the enterprise to reduce costs and materials. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the lifting and pressing part structure of this utility model.

[0013] Reference numerals: 1. Drive cam; 11. Cable lifter; 111. Mounting hole; 112. Cable lifter ramp; 12. Lifting section; 121. Lifting ramp one; 122. Lifting ramp two; 123. Lifting ramp three. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0015] Example 1, referring to Figure 1 As shown, a drive cam for a sewing machine is provided, including a drive cam 1. The drive cam 1 includes a thread-lifting part 11 and a lifting and pressing part. The thread-lifting part 11 is provided with a mounting hole 111 and a thread-lifting inclined surface 112. The inclination of the thread-lifting inclined surface 112 is 0~18°, and the thread-lifting action angle of the thread-lifting part 11 is 0~30°. The lifting and pressing part includes a first lifting and pressing inclined surface 121, a second lifting and pressing inclined surface 122, and a third lifting and pressing inclined surface 123. The lateral center distance L1 between the center of the first lifting and pressing inclined surface 121 and the mounting hole 111 is 11mm~12mm. The longitudinal center distance L2 between the center of 121 and the mounting hole 111 is 2mm~3mm; the longitudinal center distance L3 between the center of the second lifting slope 122 and the mounting hole 111 is 6.5mm~7.5mm; the center of the second lifting slope 122 and the mounting hole 111 are on the same transverse center; the transverse center distance L4 between the center of the third lifting slope 123 and the mounting hole 111 is 13.5mm~14.5mm; and the longitudinal center distance L5 between the center of the third lifting slope 123 and the mounting hole 111 is 4.5mm~5.5mm.

[0016] In this embodiment, when a wire lifting action is required, the drive source rotates counterclockwise, thereby driving the drive cam 1 to rotate. When the drive cam 1 rotates 10° under the drive source, the wire lifting inclined surface 112 of the drive cam 1 contacts the wire lifting part 11, and the inclined surface of the wire lifting inclined surface 112 drives the wire lifting part 11 to make linear displacement, thereby achieving the wire lifting action and releasing the pressure on the surface wire. When a pressure foot lifting action is required, the drive source drives the drive cam 1 to rotate. At this time, the first pressure lifting inclined surface 121 of the drive cam 1 abuts against the front lever part of the pressure foot. Then, the drive source continues to drive the drive cam 1 to rotate, so that the first pressure lifting inclined surface 121, the second pressure lifting inclined surface 122, and the third pressure lifting inclined surface 123 of the pressure lifting part abut against the front lever in sequence, thereby driving the front lever to rotate and realizing the pressure foot lifting action.

[0017] The rotation of a drive source, driven by cam 1, enables the lifting of the presser foot and the lifting of the wire. The structure is simple, the operation is convenient, the overall adaptability is improved, and the cost is reduced, which is conducive to the company's cost reduction and material reduction.

[0018] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A drive cam for a sewing machine, comprising a drive cam (1), characterized in that: The drive cam (1) includes a pusher section (11) and a lifting and pressing section. The pusher section (11) is provided with a mounting hole (111) and a pusher inclined surface (112). The lifting and pressing section includes a first lifting and pressing inclined surface (121), a second lifting and pressing inclined surface (122), and a third lifting and pressing inclined surface (123).

2. The drive cam for a sewing machine according to claim 1, characterized in that: The lateral center distance L1 between the center of the lifting and pressing inclined surface (121) and the mounting hole (111) is 11mm~12mm, and the longitudinal center distance L2 between the center of the lifting and pressing inclined surface (121) and the mounting hole (111) is 2mm~3mm.

3. The drive cam for a sewing machine according to claim 1, characterized in that: The longitudinal center distance L3 between the center of the lifting inclined surface 2 (122) and the mounting hole (111) is 6.5mm~7.5mm.

4. A drive cam for a sewing machine according to claim 1, characterized in that: The lateral center distance L4 between the center of the lifting and pressing inclined surface three (123) and the mounting hole (111) is 13.5mm~14.5mm, and the longitudinal center distance L5 between the center of the lifting and pressing inclined surface three (123) and the mounting hole (111) is 4.5mm~5.5mm.

5. A drive cam for a sewing machine according to claim 1, characterized in that: The slope of the inclined plane (112) is 0~18°.

6. A drive cam for a sewing machine according to claim 1, characterized in that: The lifting angle of the lifting section (11) is 0~30°.

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