Backstitch mechanism of sewing machine

Abstract

The utility model provides a backstitch mechanism of a sewing machine, which belongs to the technical field of sewing machines, and comprises a sewing assembly, a sewing machine main machine, a support plate fixedly arranged at the end part of the sewing machine main machine, and a lower positioning die fixedly arranged at the end part of the support plate; the backstitching assembly comprises a main shaft rotationally installed at the lower end of the supporting plate, a stirring piece fixedly installed in the middle of the main shaft and a positioning plate fixedly installed at the upper end of the stirring piece, and the end of the positioning plate is bent to the side wall of the lower positioning die. The back stitching mechanism has the advantages that the back stitching mechanism can quickly and smoothly achieve switching between front stitching and back stitching, the operation time is shortened, the stitch length and stitch tension during back stitching can be accurately controlled, it is guaranteed that back stitching stitches and front stitching stitches are kept consistent in density, flatness and the like, and by adjusting parameters of the back stitching mechanism, the back stitching precision is improved. The sewing machine can be suitable for fabrics of different materials, thicknesses and elasticity, and the application range of the sewing machine is widened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sewing machine technical field, and specifically relates to a sewing machine backstitch mechanism. BACKGROUND

[0002] Sewing machine is the machine that one or more sewing lines are used to form one or more lines on the sewing material, and one or more sewing materials are interlaced or sewn, needle bar mechanism drives sewing needle to make up and down reciprocating movement, and sewing line is passed through the sewing material. Meanwhile, thread take-up mechanism cooperates with needle bar mechanism to control the tension and take-up of sewing line. Thread hooking mechanism is responsible for hooking the line brought by sewing needle to form line. Feeding mechanism pushes the sewing material to move according to certain rhythm and speed in the sewing process, so that sewing needle can continuously form line on the sewing material.

[0003] With the continuous evolution of fashion trend, the style of clothes is increasingly rich and various, and the requirement of sewing process is also higher and higher. For example, in some special designed clothes, such as back pocket sewing of jeans, clear line decoration of windbreaker, etc., backstitch process needs to be frequently used to realize specific sewing effect, which puts forward higher requirement on the performance and flexibility of sewing machine backstitch mechanism. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a sewing machine backstitch mechanism, and aims at solving the problems in the above background technology.

[0005] In order to realize the above purpose, the utility model provides the following technical scheme:

[0006] A sewing machine backstitch mechanism, comprising,

[0007] Sewing assembly, comprising sewing machine host, support plate fixedly installed at the end of the sewing machine host, and lower positioning die fixedly installed at the end of the support plate,

[0008] Backstitch assembly, comprising main shaft rotatably installed at the lower end of the support plate, knob fixedly installed at the middle position of the main shaft, and positioning plate fixedly installed at the upper end of the knob, the end of the positioning plate is bent to the side wall of the lower positioning die, and the side wall of the end of the positioning plate is provided with positioning groove structure matched with the side wall of the lower positioning die.

[0009] As a preferred scheme of the utility model, the backstitch assembly further comprises connecting piece rotatably installed at the middle position of the lower end of the support plate, and air cylinder fixedly installed at the middle of the connecting piece, and the end of the air cylinder is rotatably installed at the bottom of the knob.

[0010] As a preferred scheme of the utility model, the sewing assembly further comprises upper positioning die movably inserted at the upper end of the lower positioning die, and the upper positioning die is used in cooperation with the lower positioning die.

[0011] As a preferred scheme of the utility model, the sewing assembly further comprises a supporting seat installed at the middle position of the sewing machine main machine, and the upper end of the upper positioning die is connected to the end of the supporting seat by bolts.

[0012] As a preferred scheme of the utility model, the sewing assembly further comprises a push rod rotatably installed on the side wall of the supporting seat, the front end of the push rod is inserted into the side wall of the end of the supporting seat, and the end of the push rod extends to the side wall of the upper end of the upper positioning die.

[0013] As a preferred scheme of the utility model, the sewing assembly further comprises a positioning column rotatably installed on the upper end side of the supporting seat, and the positioning column is installed on the side wall above the push rod.

[0014] As a preferred scheme of the utility model, the sewing assembly further comprises a tension spring fixedly installed on the end of the push rod, and the end of the tension spring is connected to the side wall of the sewing machine main machine by bolts.

[0015] Compared with the prior art, the utility model has the beneficial effects that: the reverse sewing mechanism can quickly and smoothly realize the switching between normal sewing and reverse sewing, in some sewing tasks that need frequent reverse sewing, such as sewing pockets, cuffs and other parts, the operation time is reduced, the overall sewing efficiency is improved, the operation process is not complicated, the labor intensity of the operator is reduced, the stitch length and the thread tension during reverse sewing can be accurately controlled, the reverse sewing stitch and the normal sewing stitch are kept consistent in density, flatness and other aspects, by adjusting the parameters of the reverse sewing mechanism, such as stitch length and thread tension, the reverse sewing mechanism can be applied to fabrics of different materials, thicknesses and elasticity, and the application range of the sewing machine is expanded. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the front structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the side structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the bottom structure of the utility model.

[0021] In the figure: 100, sewing assembly; 101, sewing machine main machine; 102, support plate; 103, lower positioning die; 104, upper positioning die; 105, support seat; 106, lever; 107, positioning column; 108, tension spring; 200, backstitch assembly; 201, main shaft; 202, actuator; 203, positioning plate; 204, connecting piece; 205, air cylinder. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0023] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be practiced without other different ways from the description, and those skilled in the art can make similar generalizations without departing from the content of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0024] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment.

[0025] Embodiment

[0026] Reference Figures 1-4 For the embodiment of the present application, the embodiment provides a sewing machine backstitch mechanism, comprising,

[0027] The sewing assembly 100 comprises a sewing machine main machine 101, a support plate 102 fixedly installed at the end of the sewing machine main machine 101, and a lower positioning die 103 fixedly installed at the end of the support plate 102.

[0028] The backstitch assembly 200 comprises a main shaft 201 rotatably installed at the lower end of the support plate 102, an actuator 202 fixedly installed at the middle position of the main shaft 201, and a positioning plate 203 fixedly installed at the upper end of the actuator 202. The end of the positioning plate 203 is bent to the side wall of the lower positioning die 103, and the side wall of the end of the positioning plate 203 is provided with a positioning groove structure matched with the side wall of the lower positioning die 103.

[0029] The lower positioning die 103 is installed at the end of the sewing machine main machine 101 in cooperation with the supporting plate 102, so that the article to be sewn is conveniently positioned, the sewing precision of the article is maintained, the supporting plate 102 can maintain the stability of the position of the lower positioning die 103, the actuating member 202 connected through the main shaft 201 is installed on the side wall of the supporting plate 102, the positioning plate 203 installed at the upper end of the actuating member 202 is used in cooperation with the lower positioning die 103, the article to be sewn can be further positioned, and the positioning plate 203 can adjust the position of the article by rotating in the main shaft 201 along with the actuating member 202, so that the sewing machine main machine 101 is conveniently used when backstitching, the positioning precision of the product is improved, the product can also be pressed, and the product is prevented from loosening.

[0030] Specifically, the backstitching assembly 200 further comprises a connecting member 204 rotatably installed at the middle position of the lower end of the supporting plate 102, and a pneumatic cylinder 205 fixedly installed at the middle of the connecting member 204, and the pneumatic cylinder 205 is rotatably installed at the bottom of the actuating member 202.

[0031] The pneumatic cylinder 205 is installed at the lower end of the supporting plate 102 through the rotatable connecting member 204, the pneumatic cylinder 205 is driven to operate through a control device, the pneumatic cylinder 205 can exert a pushing force on the bottom of the actuating member 202 on the basis of the installation provided by the connecting member 204, and then drive the actuating member 202 to rotate along the main shaft 201 by a certain amplitude, so that the position of the positioning plate 203 is adjusted to adapt to different use requirements.

[0032] Further, the sewing assembly 100 further comprises an upper positioning die 104 movably inserted at the upper end of the lower positioning die 103, and the upper positioning die 104 is used in cooperation with the lower positioning die 103.

[0033] The upper positioning die 104 is used in cooperation with the lower positioning die 103, the side wall of the product is aligned with the side wall of the lower positioning die 103 and the upper positioning die 104, and when the sewing machine main machine 101 backstitches, the position of the product can be kept stable, and the stitch distance is more uniform.

[0034] Further, the sewing assembly 100 further comprises a supporting seat 105 installed at the middle position of the sewing machine main machine 101, and the upper end of the upper positioning die 104 is connected to the end of the supporting seat 105 through bolts.

[0035] The supporting seat 105 is installed at the middle of the sewing machine main machine 101 and is connected to the upper positioning die 104, so that the position of the upper positioning die 104 is kept stable.

[0036] Preferably, the sewing assembly 100 further comprises a lever 106 rotatably installed at the side wall of the supporting seat 105, the front end of the lever 106 is inserted into the side wall of the end of the supporting seat 105, and the end of the lever 106 extends to the side wall of the upper end of the upper positioning die 104.

[0037] Wherein, the push rod 106 installed on the side wall of the support base 105 is in contact with the upper positioning die 104, and the rotation of the push rod 106 facilitates the loosening of the product placed between the upper positioning die 104 and the lower positioning die 103, and adapts to different use requirements.

[0038] It should be explained that the sewing assembly 100 further comprises a positioning column 107 rotatably installed on the upper end side of the support base 105, and the positioning column 107 is installed on the upper side wall of the push rod 106.

[0039] Wherein, the positioning column 107 is added to the side wall of the support base 105, and the positioning column 107 can limit the rotation amplitude of the push rod 106, so as to avoid the upper positioning die 104 from colliding with the side wall of the sewing machine main machine 101 due to excessive rotation angle.

[0040] Preferably, the sewing assembly 100 further comprises a tension spring 108 fixedly installed on the end of the push rod 106, and the end of the tension spring 108 is connected to the side wall of the sewing machine main machine 101 through a bolt.

[0041] Wherein, the tension spring 108 is installed on the side wall of the sewing machine main machine 101 and is in butt joint with the push rod 106, so as to provide a certain tension on the end of the push rod 106 on the basis of the installation of the sewing machine main machine 101, and keep the position of the push rod 106 stable.

[0042] In use, the side wall of the product is aligned with the side wall of the lower positioning die 103 and the upper positioning die 104, and the product is positioned when the sewing machine main machine 101 is backstitching. The control equipment drives the cylinder 205 to operate, the cylinder 205 can exert a pushing force on the bottom of the pusher 202 on the basis of the installation provided by the connecting piece 204, and then drive the pusher 202 to rotate a certain amplitude along the main shaft 201, so as to adjust the position of the positioning plate 203, and further adjust the position of the product, so as to facilitate the sewing and backstitching operation.

[0043] In summary, the backstitching mechanism can quickly and smoothly realize the switching between normal sewing and backstitching. In some sewing tasks that require frequent backstitching, such as sewing pockets, cuffs and other parts, the operation time is greatly reduced, the overall sewing efficiency is improved, the operation process is not complicated, the labor intensity of the operator is reduced, the stitch length and thread tension during backstitching can be accurately controlled, the backstitching line and the normal sewing line are consistent in density and flatness, and the backstitching mechanism can be adapted to different materials, thicknesses and elastic fabrics by adjusting parameters such as stitch length and thread tension, thereby expanding the application range of the sewing machine.

[0044] It is important to note that the construction and arrangements of the application shown in the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications can be made to the embodiments without departing from the novel teachings and advantages of the subject matter described herein. For example, elements described as integrated in a single unit can be separated, elements described as separate can be integrated, and the position, number, shape, and arrangements of elements can be varied. Accordingly, all such modifications are intended to be included within the scope of the present inventive subject matter. The order or sequence of any process or method steps can be varied or re-sequenced without departing from the general nature of the claims. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functionality and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present inventive subject matter. Accordingly, the present inventive subject matter is not limited to the particular embodiments described and illustrated herein, but extends to equivalents of which the foregoing describes are intended to cover.

[0045] Furthermore, in order to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (i.e., those related to the

[0046] It is understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can inevitably lead to modifications, which can be different from those suggested herein, and still fall within the scope of the present inventive subject matter. Those skilled in the art will appreciate the

[0047] It should be noted that the above examples are intended to illustrate the technical solutions of the present application but not limit the present application, and although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and all should be included in the scope of the claims of the present application.

Claims

1. A sewing machine reverse mechanism characterized by: Comprising, The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105). The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105).

2. A reverse sewing mechanism for a sewing machine according to claim 1, characterized in that: The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105).

3. A reverse sewing mechanism for a sewing machine according to claim 2, wherein: The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105).

4. The reverse sewing mechanism for a sewing machine according to claim 3, wherein: The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105).

5. A reverse sewing mechanism for a sewing machine according to claim 4, wherein: The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105).

6. A reverse sewing mechanism for a sewing machine according to claim 5, wherein: The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105).

7. A reverse sewing mechanism for a sewing machine according to claim 6, wherein: The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105). The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105). The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105). The sewing assembly (100) further comprises a support seat (105) installed at the middle position of the sewing machine main body (101), and the upper positioning die (104) is bolted at the end of the support seat (105). 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