A switchable model of a serging machine
By designing a switchable overlock sewing machine, and utilizing the movable connection and fixing structure between the sewing table and the side cover, the problem of existing overlock sewing machines being unable to switch models is solved, achieving the effects of rapid switching and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG MAQI SEWING MACHINE
- Filing Date
- 2025-07-17
- Publication Date
- 2026-08-04
AI Technical Summary
Existing overlock sewing machines cannot freely switch between small-mouth and regular sewing heads, resulting in high production costs and large space requirements.
Design a switchable overlock sewing machine that allows for quick switching between regular and small-mouth sewing heads via a movable connection between the sewing table and the side cover. The machine is secured using pins and nuts, and the design of the sewing table support plate and notch ensures normal machine operation.
It enables quick switching between regular and small-mouth sewing heads, reduces production costs, minimizes equipment space requirements, and is easy to operate.
Smart Images

Figure CN224591180U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to overlock sewing machine equipment, and more particularly to an overlock sewing machine with switchable models. Background Technology
[0002] Existing overlock sewing machines are divided into small-mouth models and regular models, which are used for narrow areas (such as children's cuffs) and large-area sewing, respectively.
[0003] ZL201720628787.5 discloses an integrated structure for cutting thread and lifting presser foot of an overlock sewing machine. In this scheme, the motor is installed horizontally on the upper part of the rear side of the machine body. Both ends of the motor shaft extend outward and are equipped with cams. The two cams drive the thread cutting and presser foot lifting mechanisms respectively. This scheme is relatively complex in technology, and the cost of using a dual-axis motor is relatively high.
[0004] As described in prior art CN202021964832.2, a novel thread-cutting and presser foot-lifting mechanism for an overlock sewing machine includes a drive motor, a presser foot-lifting mechanism, a thread-cutting mechanism, and a swing arm assembly. The middle part of the swing arm assembly is rotatably mounted on the frame. The left arm of the swing arm at the point of rotation drives the presser foot-lifting mechanism, and the right arm of the swing arm at the point of rotation drives the thread-cutting mechanism. The outer end of the left arm is driven by the drive motor to move up and down. The upper end of the right arm has a pushing part. When the right arm swings down to a set position, the pushing part drives the thread-cutting mechanism and performs thread cutting. When the right arm moves in the opposite direction to the set position, the pushing part separates from the thread-cutting mechanism.
[0005] With existing overlock sewing machines, only ordinary or small-nozzle models can be selected, and switching between them is not possible. Summary of the Invention
[0006] This invention addresses the problem that existing overlock machines cannot freely switch between small-mouth overlock machines and ordinary-mouth overlock machines, requiring garment factories to equip themselves with two types of equipment, resulting in high production costs and large space occupation. It provides an overlock machine that can switch between different models.
[0007] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:
[0008] A switchable overlock sewing machine includes an overlock sewing machine head, a side cover and a sewing head module on one side of the overlock sewing machine head; the sewing head module includes a mounting plate and a base, the mounting plate is fixedly connected to the housing of the side cover of the overlock sewing machine head, and a needle plate is mounted on the base; it also includes a sewing table, the sewing table is movably connected to the side cover; the sewing head module is located below the sewing table.
[0009] Preferably, a seam support plate is installed on the side cover, and the seam support plate is provided with a first connection hole and a second connection hole.
[0010] Preferably, a pivot pin is provided below the seam platform; the pivot pin passes through the first connecting hole and the second connecting hole in sequence, and is fixed by a nut.
[0011] Preferably, a sewing head module side cover is provided above the base. The sewing head module side cover is movably connected to the base. When the sewing head module side cover is closed, the needle plate is located above the base, and the needle plate and the sewing head module side cover are spliced into a plane. When the sewing head module side cover is opened or closed, the needle plate and the sewing head module side cover are separated.
[0012] Preferably, a notch is provided on one side of the sewing table; the notch and the needle plate are joined to form a flat surface.
[0013] As a preferred option, a wave-shaped pressure plate is also provided below the seam platform.
[0014] This utility model, by adopting the above technical solution, has significant technical effects:
[0015] The overlock sewing machine designed in this utility model can quickly switch between a regular overlock sewing machine and a small-mouth overlock sewing machine, thereby effectively reducing production costs and reducing production space.
[0016] This utility model, through the design of the sewing table, can effectively switch between a regular overlock sewing machine and a small-mouth overlock sewing machine, and achieve the functions of a regular overlock sewing machine without changing the original small-mouth overlock sewing machine. Moreover, the design is simple and the operation is convenient. Attached Figure Description
[0017] Figure 1 This is a structural diagram of a common overlock sewing machine according to this utility model.
[0018] Figure 2 This is a structural diagram of the small-mouth overlock sewing machine of this utility model.
[0019] Figure 3 This is a structural diagram of the sewing head module of this utility model.
[0020] Figure 4 This is a structural diagram of the seam platform of this utility model.
[0021] Among them, 1—overlock sewing machine head, 2—side cover, 3—sewing head module, 4—mounting plate, 5—base, 6—sewing table, 7—sewing table support plate, 71—first connecting hole, 72—second connecting hole, 61—shaft pin, 62—pressure plate, 8—needle plate, 31—sewing head module side cover. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0023] Example 1
[0024] A switchable overlock sewing machine includes an overlock sewing machine head 1, a side cover 2 and a sewing head module 3 on one side of the overlock sewing machine head 1; the sewing head module 3 includes a mounting plate 4 and a base 5, the mounting plate 4 is fixedly connected to the side cover 2 and the housing of the overlock sewing machine head 1, and a needle plate 8 is mounted on the base 5; it also includes a sewing table 6, which is movably connected to the side cover 2; the sewing head module 3 is located below the sewing table 6.
[0025] By movably connecting the sewing platform 6 to the side cover 2, when the sewing platform 6 is directly above the sewing head module 3, the overlock sewing machine is an overlock sewing machine for ordinary sewing heads; when the sewing platform 6 is far above the sewing head module 3, the overlock sewing machine is an overlock sewing machine for the sewing head module 3.
[0026] Example 2
[0027] A switchable overlock sewing machine includes an overlock sewing machine head 1, a side cover 2 and a sewing head module 3 on one side of the overlock sewing machine head 1; the sewing head module 3 includes a mounting plate 4 and a base 5, the mounting plate 4 is fixedly connected to the side cover 2 unit, and a needle plate 8 is mounted on the base 5; it also includes a sewing table 6, which is movably connected to the side cover 2; the sewing head module 3 is located below the side cover 2.
[0028] A seam support plate 7 is installed on the side cover 2. The seam support plate 7 is provided with a first connecting hole 71 and a second connecting hole 72.
[0029] A pivot pin 61 is provided below the sewing platform 6; the pivot pin 61 passes through the first connecting hole 71 and the second connecting hole 72 in sequence, and is fixed by a nut.
[0030] Example 3
[0031] A switchable overlock sewing machine includes an overlock sewing machine head 1, a side cover 2 and a sewing head module 3 on one side of the overlock sewing machine head 1; the sewing head module 3 includes a mounting plate 4 and a base 5, the mounting plate 4 is fixedly connected to the side cover 2 unit, and a needle plate 8 is mounted on the base 5; it also includes a sewing table 6, which is movably connected to the side cover 2; the sewing head module 3 is located below the side cover 2.
[0032] A seam support plate 7 is installed on the side cover 2. The seam support plate 7 is provided with a first connecting hole 71 and a second connecting hole 72.
[0033] A pivot pin 61 is provided below the sewing platform 6; the pivot pin 61 passes through the first connecting hole 71 and the second connecting hole 72 in sequence, and is fixed by a nut.
[0034] The machine is connected to the sewing table support plate 7 via the pivot pin 61, so that when the overlock sewing machine is working on the sewing head module 3, the sewing table 6 of the overlock sewing machine can be rotated directly; the operation is simple.
[0035] A sewing head module side cover 31 is provided above the base 5. The sewing head module side cover 31 is movably connected to the base 5. When the sewing head module side cover 31 is closed, the needle plate 8 is located above the base 5, and the needle plate 8 and the sewing head module side cover 31 are spliced into a plane. When the sewing head module side cover 31 is opened or closed, the needle plate 8 and the sewing head module side cover 31 are separated.
[0036] A notch is provided on one side of the sewing table 6; the notch and the needle plate 8 are joined together to form a flat surface.
[0037] By providing a notch on one side of the sewing table 6, it is ensured that when the overlock sewing machine is used as a regular sewing head, it is located on the same plane as the sewing head module overlock sewing machine, thus ensuring the normal operation of the overlock sewing machine.
[0038] Example 4
[0039] A switchable overlock sewing machine includes an overlock sewing machine head 1, a side cover 2 and a sewing head module 3 on one side of the overlock sewing machine head 1; the sewing head module 3 includes a mounting plate 4 and a base 5, the mounting plate 4 is fixedly connected to the side cover 2 unit, and a needle plate 8 is mounted on the base 5; it also includes a sewing table 6, which is movably connected to the side cover 2; the sewing head module 3 is located below the side cover 2.
[0040] A seam support plate 7 is installed on the side cover 2. The seam support plate 7 is provided with a first connecting hole 71 and a second connecting hole 72.
[0041] A pivot pin 61 is provided below the sewing platform 6; the pivot pin 61 passes through the first connecting hole 71 and the second connecting hole 72 in sequence, and is fixed by a nut.
[0042] A sewing head module side cover 31 is provided above the base 5. The sewing head module side cover 31 is movably connected to the base 5. When the sewing head module side cover 31 is closed, the needle plate 8 is located above the base 5, and the needle plate 8 and the sewing head module side cover 31 are spliced into a plane. When the sewing head module side cover 31 is opened or closed, the needle plate 8 and the sewing head module side cover 31 are separated.
[0043] A notch is provided on one side of the sewing table 6; the notch and the needle plate 8 are joined together to form a flat surface.
[0044] A wavy pressure plate 62 is also provided below the sewing table 6. By providing a wavy pressure plate 62 below the sewing table 6, when the sewing table 6 is above the sewing head module 3, the pressure plate 62 fixes the side cover 31 of the sewing head module 3 and the movable part 81 of the needle plate 8 after the sewing head module 3 is opened. When the overlock sewing machine is working, the side cover 31 of the sewing head module 3 and the movable part 81 of the needle plate 8 are kept fixed, which will not affect the normal operation of the overlock sewing machine.
Claims
1. A switchable overlock sewing machine, comprising an overlock sewing machine head (1), a side cover (2) and a sewing head module (3) on one side of the overlock sewing machine head (1); the sewing head module (3) includes a mounting plate (4) and a base (5), the mounting plate (4) being fixedly connected to the side cover (2) and the housing of the overlock sewing machine head (1), and a needle plate (8) being mounted on the base (5); characterized in that, It also includes a sewing platform (6), which is movably connected to the side cover (2); the sewing head module (3) is located below the sewing platform (6).
2. The overlock sewing machine with switchable models according to claim 1, characterized in that, A seam support plate (7) is installed on the side cover (2), and the seam support plate (7) is provided with a first connecting hole (71) and a second connecting hole (72).
3. The overlock sewing machine with switchable models according to claim 1, characterized in that, A pin (61) is provided below the sewing platform (6); the pin (61) passes through the first connecting hole (71) and the second connecting hole (72) in sequence, and is fixed by a nut.
4. The overlock sewing machine with switchable models according to claim 1, characterized in that, The base (5) is provided with a sewing head module side cover (31). The sewing head module side cover (31) is movably connected to the base (5). When the sewing head module side cover (31) is closed, the needle plate (8) is located above the base (5), and the needle plate (8) and the sewing head module side cover (31) are spliced into a plane. When the sewing head module side cover (31) is opened and closed, the needle plate (8) and the sewing head module side cover (31) are separated.
5. The overlock sewing machine with switchable models according to claim 1, characterized in that, A notch is provided on one side of the sewing table (6); the notch and the needle plate (8) are joined together to form a plane.
6. The overlock sewing machine with switchable models according to claim 1, characterized in that, A wave-shaped pressure plate (62) is also provided below the sewing table (6).