Electric sewing machine automatic threading device

Abstract

The utility model provides a kind of automatic threading device of electric sewing machine, comprising: sewing machine, height adjusting device and threading device, wherein height adjusting device is set on sewing machine;Threading device includes support frame and hooking component, the automatic threading device of electric sewing machine of the utility model embodiment, can be moved on the outer wall of support pole by moving bucket, so as to adjust the height of threading device, and rotationally set support frame on moving bucket, the orientation of hooking needle can be adjusted, and when moving block moves, moving block will rotate under the influence of threaded sliding slot and sliding block, so that hooking needle will wind wire body on hooking needle when hooking wire body moves, so as to prevent wire body from falling off.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to an automatic threading device for an electric sewing machine. Background Technology

[0002] Sewing machines are important production equipment in the textile processing process. They can effectively increase the production speed of textiles, improve enterprise capacity, and reduce labor costs. They have been widely used and promoted in society. In order to further improve the textile speed, automatic threading devices are needed.

[0003] In existing technologies, the threading device is usually fixed on the sewing machine body on the side of the needle. This makes it easy for the operator to be blocked by the threading device when pushing the fabric to sew. Moreover, most existing threading devices work by hooking the thread through the needle eye with a hook needle and pulling it back to pass the thread through the needle eye. However, this method can easily cause the thread to detach from the hook needle when it is pulled. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0005] Therefore, one objective of this utility model is to provide an automatic threading device for an electric sewing machine. By using a height adjustment device and a threading device rotatably mounted on the height adjustment device, the angle and height of the threading device can be adjusted, thereby preventing the worker from being obstructed by the threading device during sewing. Furthermore, through the cooperation of the moving block and the slider, the hook needle can be rotated when the thread is pulled, thereby preventing the thread from detaching from the hook needle during the pulling process.

[0006] To achieve the above objectives, the first aspect of this utility model provides an automatic threading device for an electric sewing machine, comprising: a sewing machine, a height adjustment device, and a threading device, wherein the height adjustment device is disposed on the sewing machine; the threading device includes a support frame and a thread hook assembly, wherein one end of the support frame is rotatably disposed on one end of the height adjustment device; the thread hook assembly is movably disposed inside the support frame, and the working end of the thread hook assembly is perpendicular to the working end of the sewing machine.

[0007] In addition, the automatic threading device for electric sewing machines proposed above according to this utility model may also have the following additional technical features: Specifically, the height adjustment device includes a support rod, a spring, and a movable bucket. The support rod is vertically mounted on the sewing machine and is parallel to the working end of the sewing machine. The movable bucket is fitted onto the outer wall of the support rod, and one end of the support frame is rotatably mounted at the bottom of the movable bucket. The spring is disposed inside the movable bucket, and both ends of the spring are connected to the support rod and the movable bucket, respectively.

[0008] Specifically, the support frame is hollow inside and has clearance grooves on its side walls.

[0009] Specifically, the hook assembly includes a half gear, a strip tooth, a moving block, a slider, a return spring, and a hook needle. The half gear is rotatably mounted on the support frame and is located inside the clearance groove. The strip tooth is movably mounted within the support frame and meshes with the half gear. One end of the moving block abuts against the strip tooth, and the other end passes through the support frame and extends outwards. A threaded groove is formed on the outer wall of the moving block. The slider is fixedly mounted on the support frame, and one end of the slider is located within the threaded groove. The return spring is wound around the outer wall of the extended end of the moving block and is located inside the support frame. The hook needle is fixedly mounted on the extended end of the moving block.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The automatic threading device of the electric sewing machine of the present invention can adjust the height of the threading device by moving the movable barrel on the outer wall of the support rod. The orientation of the hook needle can be adjusted by rotating the support frame set on the movable barrel. When the movable block moves, the movable block will rotate due to the influence of the threaded groove and the slider, so that when the hook needle hooks the thread and moves, the thread will be wrapped around the hook needle, thereby preventing the thread from falling off.

[0011] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0012] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a three-dimensional structural schematic diagram of an automatic threading device for an electric sewing machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an automatic threading device for an electric sewing machine according to an embodiment of the present invention, showing the threading device located on a height adjustment device; Figure 3This is an exploded structural diagram of the height adjustment device of the automatic threading device for an electric sewing machine according to an embodiment of the present invention; Figure 4 This is a cross-sectional structural diagram of the threading device of an automatic threading device for an electric sewing machine according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the hook assembly structure of an automatic threading device for an electric sewing machine according to an embodiment of the present invention.

[0013] Figure label: 1. Sewing machine; 2. Height adjustment device; 21. Support rod; 22. Spring; 23. Moving barrel; 3. Threading device; 31. Support frame; 311. Relief groove; 32. Thread hook assembly; 321. Half gear; 322. Strip tooth; 323. Moving block; 3231. Threaded groove; 324. Sliding block; 325. Return spring; 326. Thread hook needle. Detailed Implementation

[0014] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0015] The automatic threading device for an electric sewing machine according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0016] like Figures 1-5 As shown, the automatic threading device for an electric sewing machine according to an embodiment of the present invention may include: a sewing machine 1, a height adjustment device 2, and a threading device 3.

[0017] The height adjustment device 2 is installed on the sewing machine 1.

[0018] It should be noted that the height adjustment device 2 described in this embodiment is located on the side of the sewing machine needle 1, so that when the threading device 3 rotates, the working end can be inserted into the eye of the needle.

[0019] The threading device 3 includes a support frame 31 and a hook assembly 32.

[0020] One end of the support frame 31 is rotatably mounted on one end of the height adjustment device 2, and the hook assembly 32 is movably mounted inside the support frame 31, with the working end of the hook assembly 32 perpendicular to the working end of the sewing machine 1.

[0021] Specifically, when threading is required, the worker first pulls one end of the thread so that it is on the side away from the threading device 3. At this time, the height adjustment device 2 is used to make the working end of the hook assembly 32 and the needle eye at the same level, and the support frame 31 is rotated so that the working end of the hook assembly 32 is aligned with the needle eye.

[0022] At this time, the operator operates the working end of the hook assembly 32 to pass through the needle eye and hook the line. When the hook assembly 32 is reset, the line is wound around the working end and pulled through the needle eye to complete the threading work.

[0023] like Figure 3 As shown in the figure, the height adjustment device 2 of the electric sewing machine automatic threading device of this utility model includes a support rod 21, a spring 22 and a movable barrel 23.

[0024] The support rod 21 is vertically mounted on the sewing machine 1 and is parallel to the working end of the sewing machine 1. The movable barrel 23 is fitted on the outer wall of the support rod 21, and one end of the support frame 31 is rotatably mounted at the bottom of the movable barrel 23. The spring 22 is located inside the movable barrel 23, and both ends of the spring 22 are connected to the support rod 21 and the movable barrel 23 respectively.

[0025] It should be noted that when the movable bucket 23 described in this embodiment moves to the end of the support rod 21, the working end of the hook assembly 32 set inside the support frame 31 is at the same horizontal plane as the needle eye, so that the workers can quickly align the working end of the hook assembly 32 with the needle eye.

[0026] Specifically, by pulling the movable bucket 23 to move it along the outer wall of the support rod 21, the height of the support frame 31 can be adjusted. When the pulling stops, the deformed spring 22 will drive the movable bucket 23 and the support frame 31 to reset, thereby preventing the wire threading device 3 from blocking the workers during the work process.

[0027] like Figure 4 and Figure 5 As shown, the automatic threading device for an electric sewing machine in this embodiment of the present invention has a hollow internal support frame 31 with a clearance groove 311 on its side wall.

[0028] The hook assembly 32 includes a half gear 321, a bar tooth 322, a moving block 323, a slider 324, a return spring 325, and a hook needle 326.

[0029] The half gear 321 is rotatably mounted on the support frame 31 and is located inside the relief groove 311. The strip tooth 322 is movably mounted inside the support frame 31 and meshes with the half gear 321. One end of the moving block 323 abuts against the strip tooth 322, and the other end passes through the support frame 31 and extends outward. A threaded groove 3231 is provided on the outer wall of the moving block 323. The slider 324 is fixedly mounted on the support frame 31 and one end of the slider 324 is located inside the threaded groove 3231. The return spring 325 is wound around the outer wall of the extended end of the moving block 323 and is located inside the support frame 31. The hook needle 326 is fixedly mounted on the extended end of the moving block 323.

[0030] It should be noted that the half gear 321 described in this embodiment is provided with a trigger on its top, so that the operator can drive the half gear 321 to rotate by pushing the trigger.

[0031] Specifically, when the half gear 321 rotates, the half gear 321 will drive the meshing bar tooth 322 to move, thereby causing the bar tooth 322 to push the moving block 323 on one side to move.

[0032] The movement of the moving block 323 causes the hook needle 326 fixed thereon to move as well, allowing the hook needle 326 to pass through the eye of the needle. During the movement, the hook needle 326 rotates due to the influence of the threaded groove 3231 and the slider 324, and compresses the return spring 325 to deform. When the hook needle 326 passes through the eye of the needle and hooks the line, the return spring 325 releases its elastic potential energy, causing the moving block 323 and the bar tooth 322 to return to their original positions. During the return process, the rotating hook needle 326 wraps the line around it, allowing the line to pass through the eye of the needle along with the hook needle 326, thus completing the threading process.

[0033] In summary, the automatic threading device for electric sewing machines of this utility model adjusts the height of the threading device by moving the movable barrel on the outer wall of the support rod. The orientation of the hook needle can be adjusted by rotating the support frame set on the movable barrel. Furthermore, when the movable block moves, it will rotate due to the influence of the threaded groove and the slider, so that when the hook needle hooks the thread and moves, the thread will be wrapped around the hook needle, thus preventing the thread from falling off.

[0034] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An automatic threading device for an electric sewing machine, characterized in that, include: Sewing machine, height adjustment device, and threading device, among which, The height adjustment device is installed on the sewing machine; The threading device includes a support frame and a thread hook assembly, wherein... One end of the support frame is rotatably mounted on one end of the height adjustment device; The hook assembly is movably disposed inside the support frame, and the working end of the hook assembly is perpendicular to the working end of the sewing machine.

2. The automatic threading device for an electric sewing machine according to claim 1, characterized in that, The height adjustment device includes a support rod, a spring, and a movable bucket, wherein, The support rod is vertically mounted on the sewing machine, and the support rod is parallel to the working end of the sewing machine. The movable bucket is sleeved on the outer wall of the support rod, and one end of the support frame is rotatably mounted at the bottom of the movable bucket; The spring is disposed inside the movable barrel, and both ends of the spring are connected to the support rod and the movable barrel, respectively.

3. The automatic threading device for an electric sewing machine according to claim 1, characterized in that, The support frame is hollow inside and has clearance grooves on its side walls.

4. The automatic threading device for an electric sewing machine according to claim 3, characterized in that, The hook assembly includes a half gear, a rack gear, a moving block, a slider, a return spring, and a hook needle. The half gear is rotatably mounted on the support frame, and the half gear is located inside the clearance groove; The strip tooth is movably disposed within the support frame, and the strip tooth meshes with the half gear; One end of the movable block abuts against the strip tooth, and the other end passes through the support frame and extends outward. A threaded groove is provided on the outer wall of the movable block. The slider is fixedly mounted on the support frame, and one end of the slider is located in the threaded groove. The reset spring is wound around the outer wall of the extension end of the movable block, and the reset spring is located inside the support frame; The hook needle is fixedly mounted on the extension end of the movable block.

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