Trimming device of computerized embroidery machine and computerized embroidery machine
By designing the gap between the movable knife and the bottom line holder in the thread cutting device of the computer embroidery machine, the problem that the needle hook part cannot hook the bottom line is solved, and the embroidery efficiency is improved.
Patent Information
- Application Number
- CN202420246168.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-01-31
AI Technical Summary
When the computer embroidery machine is turned on again, there is a problem that the needle hook cannot hook the bottom line, which affects the embroidery efficiency.
A thread cutting device for a computer embroidery machine is designed, including a shuttle bed, a fixed knife, a moving knife and a bottom line holder. There is a gap between the first mating part of the actuator and the threading part of the bottom line holder, which reduces the clamping force on the bottom line and makes it easier for the needle to hook the bottom line.
By reducing the clamping force of the bottom line holder on the bottom line, the problem of the needle hooking part cannot hook the bottom line, and the embroidery efficiency of the computer embroidery machine is improved.
Smart Images
Figure CN222499653U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of computer embroidery machines, in particular to a thread trimming device of a computer embroidery machine and the computer embroidery machine. Background Art
[0002] In the related art, the movable knife reciprocates toward the fixed knife to cut the upper thread and the lower thread. At the same time, at the current moment, the thread end of the lower thread is located between the elastic sheet and the fixed knife and is clamped by the two.
[0003] When the needle of the machine head starts embroidery again, there is a problem that the thread hooking part of the needle cannot hook the bottom line, which in turn affects the embroidery efficiency of the computer embroidery machine. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a thread trimming device for a computer embroidery machine and a computer embroidery machine, which helps the thread hooking part of the needle to easily hook the bottom line when the needle of the machine head starts embroidery again, thereby avoiding affecting the embroidery efficiency of the computer embroidery machine.
[0005] According to an embodiment of the first aspect of the utility model, a thread trimming device of a computer embroidery machine is provided, comprising: a shuttle bed, a fixed knife, a movable knife and a bottom thread retaining member.
[0006] The fixed knife, the movable knife and the thread holding member are directly or indirectly connected to the shuttle bed. The fixed knife has a fixed knife blade, and the movable knife has a first surface and a second surface arranged opposite to each other. The first surface is provided with a movable knife blade, and the second surface is provided with a first matching portion and a second matching portion. The movable knife reciprocates toward the fixed knife and has a thread cutting switching position and a thread loosening switching position.
[0007] When the movable knife is in the thread trimming switching position, the second matching portion abuts against the bottom line retaining member; when the movable knife is in the bottom line loosening switching position, the second matching portion has a clearance fit with the bottom line retaining member.
[0008] In this embodiment, the bottom line holder and the first matching part of the movable knife are matched through clearance, that is, there is a gap between the first matching part of the movable knife and the thread-contacting part of the bottom line holder. No force is applied to the thread end of the bottom line at the gap, and thus the force of the thread-contacting part of the bottom line holder and the first matching part of the movable knife clamping the bottom line is greatly reduced. This helps the thread-hooking part of the needle to easily hook up the bottom line when the needle of the machine head starts embroidery again, thereby avoiding affecting the embroidery efficiency of the computer embroidery machine.
[0009] In some embodiments of the present utility model, the movable knife blade includes a blade end, the second matching portion is arranged close to the blade end, and the first matching portion is arranged away from the blade end.
[0010] In some embodiments of the present invention, the second surface includes a second area close to the blade end and a first area away from the blade end, the first matching portion is located in the first area, the second matching portion is located in the second area, the first matching portion and the second matching portion are orthographically projected on the moving knife blade, and the orthographic projection formed by the first matching portion and the second matching portion coincides with the moving knife blade.
[0011] In some embodiments of the present invention, the first matching portion is a groove, and the groove is formed by being recessed from the second surface toward the first surface.
[0012] In some embodiments of the present invention, the first matching portion is a through hole, and the through hole is formed by penetrating from the second surface to the first surface.
[0013] In some embodiments of the present utility model, the first matching portion is projected orthographically on the blade of the movable knife, and the orthographic projection area of the first matching portion accounts for 30% to 50% of the area of the blade of the movable knife.
[0014] In some embodiments of the present invention, the orthographic projection area of the first matching portion accounts for 50% of the area of the moving knife blade.
[0015] In some embodiments of the present invention, the second area is horizontally arranged, the first area is inclined relative to the second area, the angle between the first area and the second area is α, 150°<α<180°, and the first matching portion is the first area.
[0016] According to an embodiment of the second aspect of the utility model, there is provided a computer embroidery machine, comprising a thread trimming device of the computer embroidery machine according to any one of the first aspects.
[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0019] Figure 1 It is a schematic diagram of a thread trimming device of a computer embroidery machine according to an embodiment of the utility model;
[0020] Figure 2 It is an exploded view of a thread trimming device of a computer embroidery machine according to an embodiment of the utility model;
[0021] Figure 3It is a schematic diagram of the arrangement of the fixed knife, the movable knife and the bottom line retaining member according to an embodiment of the utility model;
[0022] Figure 4 is a top view of the movable knife in the thread trimming switching position according to an embodiment of the utility model;
[0023] Figure 5 It is a top view of the movable knife in the loose bottom line switching position according to the embodiment of the utility model;
[0024] Figure 6 is a schematic diagram of a moving knife according to an embodiment of the utility model;
[0025] Figure 7 yes Figure 6 A cross-sectional view of
[0026] Figure 8 yes Figure 6 Another cross-sectional view of
[0027] Fig. 9 yes Figure 6 Another cross-sectional view of
[0028] Fig.10 This is a schematic diagram of a moving knife motion trajectory according to an embodiment of the utility model;
[0029] Reference numerals:
[0030] Fixed knife 10, fixed knife blade 11;
[0031] The movable knife 20, the movable knife blade 21, the blade end 211, the blade end 212, the first matching portion 22, the second matching portion 23, the first area 201, and the second area 202;
[0032] Bottom line retaining member 30, and abutting portion 31;
[0033] The shuttle bed 40 and the rotary hook 50. DETAILED DESCRIPTION
[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0035] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.
[0036] like Figure 1-Figure 10 As shown, according to an embodiment of the first aspect of the utility model, a thread trimming device of a computer embroidery machine is provided, the thread trimming device comprising: a shuttle bed 40, a fixed knife 10, a movable knife 20 and a bottom thread retaining member 30.
[0037] like Figure 1-3 As shown, the fixed knife 10, the movable knife 20 and the bottom thread holder 30 are directly or indirectly connected to the shuttle bed 40. The fixed knife 10 has a fixed knife blade 11, and the movable knife 20 has a first surface and a second surface arranged opposite to each other, and the first surface is provided with a movable knife blade 21. The second surface is provided with a first matching portion 22 and a second matching portion 23, and the movable knife 20 reciprocates toward the fixed knife 10 and has a thread cutting switching position and a thread loosening switching position.
[0038] The movable knife 20 is in the thread trimming switching position, and the second matching portion 23 abuts against the bottom thread retaining member 30 ; the movable knife 20 is in the bottom thread loosening switching position, and the first matching portion 22 is in clearance matching with the bottom thread retaining member 30 .
[0039] It should be noted that the movable knife 20 reciprocates toward the fixed knife 10 and has a thread trimming switching position and a thread loosening switching position. When the movable knife 20 is in the thread trimming switching position, the movable knife blade 21 overlaps with the fixed knife blade 11 to cut the upper thread and the lower thread. Figure 4 As shown, at this moment, the thread end of the bottom line is clamped between the second matching portion 23 of the movable knife 20 and the bottom line retainer 30. Among them, the surface thread is the thread drawn from the needle of the machine head, and the bottom line is the thread drawn from the spin shuttle 50.
[0040] After the movable knife blade 21 overlaps with the fixed knife blade 11, it continues to move in the original direction, so that when the movable knife 20 is in the loose bottom line switching position, as shown in FIG. Figure 5 As shown, at the current moment, the end of the bottom thread is located between the thread abutting portion 31 of the bottom thread retaining member 30 and the first matching portion 22 of the movable knife 20 .
[0041] Among them, the bottom line holder 30 is loosely matched with the first matching part 22 of the movable knife 20 which is in the loose bottom line switching position, that is, there is a gap between the first matching part 22 of the movable knife 20 and the thread contact part 31 of the bottom line holder 30, and no force is applied to the thread end of the bottom line at the gap, so that the force of the thread contact part 31 of the bottom line holder 30 and the first matching part 22 of the movable knife 20 to clamp the bottom line is greatly reduced, which helps the thread hooking part of the needle to easily hook up the bottom line when the needle of the machine head starts embroidery again, thereby avoiding affecting the embroidery efficiency of the computer embroidery machine.
[0042] In some embodiments of the present invention, Fig.10 As shown, the motion trajectory of the movable blade 21 can be: C1 to C2, C2 to C3, C3 to C4. The starting position of the movable blade 21 is C1, shown by the solid line; C3 is the thread trimming switching position, and C4 is the thread loosening switching position. C4 completely overlaps with C1.
[0043] Of course, it is understandable that there are other motion trajectories of the movable knife blade 21, which are not illustrated one by one in this embodiment. Regardless of the motion trajectory of any movable knife blade 21, it includes a thread trimming switching position and a thread loosening switching position.
[0044] In some embodiments of the present invention, Figure 3 , Figure 6-Figure 9 As shown, the movable blade 21 includes a blade end 211 and a blade end 212. The second surface includes a second area 202 close to the blade end 211 and a first area 201 close to the blade end 212, the first matching portion 22 is located in the first area 201, and the second matching portion 23 is located in the second area 202. The second matching portion 23 is arranged close to the blade end 211, and the first matching portion 22 is arranged away from the blade end 211.
[0045] It should be noted that in actual application, when the movable knife 20 is in the thread cutting switching position, the movable knife blade 21 overlaps with the fixed knife blade 11 to cut the upper thread and the lower thread. In this process, usually the area of the movable knife blade 21 close to the blade end 211 cooperates with the fixed knife blade 11 of the fixed knife 10 to complete the cutting of the upper thread and the lower thread.
[0046] Based on this, a first matching portion 22 is provided at the second area 202 of the second surface close to the blade end 212 to avoid affecting the thread cutting effect of the movable blade 21 and the fixed blade 11 .
[0047] The first matching portion 22 and the second matching portion 23 are orthographically projected on the moving knife blade 21 , and the orthographic projection formed by the first matching portion 22 and the second matching portion 23 coincides with the moving knife blade 21 .
[0048] In a specific embodiment, if Figure 6-8As shown, the first matching portion 22 is a groove, which is formed by being recessed from the second surface toward the first surface.
[0049] When the movable knife 20 is in the loose bottom thread switching position, at the current moment, the end of the bottom thread is located between the thread abutment portion 31 of the bottom thread retaining member 30 and the groove on the second surface of the movable knife 20. Since there is a gap between the groove on the second surface of the movable knife 20 and the thread abutment portion 31 of the bottom thread retaining member 30, no force is applied to the end of the bottom thread at the gap, and thus the force of the thread abutment portion 31 of the bottom thread retaining member 30 and the groove on the second surface of the movable knife 20 to clamp the bottom thread is greatly reduced.
[0050] In addition, the groove is projected orthographically on the moving knife blade 21, and the orthographic projection area of the groove accounts for 30% to 50% of the area of the moving knife blade 21. In this way, while maintaining the structural strength of the moving knife blade 21, the force of the bottom line holding member 30 against the groove on the second surface of the moving knife 20 to clamp the bottom line is appropriately reduced, so as to prevent the bottom line end of the bottom line from being separated from the groove on the second surface of the automatic knife 20.
[0051] Preferably, the orthographic projection area of the groove on the second surface of the movable knife 20 accounts for 50% of the area of the movable knife edge 21 .
[0052] In another specific embodiment, Figure 3 As shown, the first matching portion 22 is a through hole, which is formed by penetrating from the second surface to the first surface.
[0053] When the movable knife 20 is in the loose bottom thread switching position, at the current moment, the end of the bottom thread is located between the thread abutment portion 31 of the bottom thread retaining member 30 and the through hole on the second surface of the movable knife 20. Since there is a gap between the through hole on the second surface of the movable knife 20 and the thread abutment portion 31 of the bottom thread retaining member 30, no force is applied to the end of the bottom thread at the gap, and thus the force of the thread abutment portion 31 of the bottom thread retaining member 30 and the through hole on the second surface of the movable knife 20 to clamp the bottom thread is greatly reduced.
[0054] The through hole is projected orthographically on the moving knife blade 21, and the orthographic projection area of the through hole accounts for 30% to 50% of the area of the moving knife blade 21. In this way, while maintaining the structural strength of the moving knife blade 21, the force of the thread end of the bottom line clamped by the thread-contacting portion 31 of the bottom line holder 30 and the through hole of the moving knife 20 is appropriately reduced, so as to prevent the thread end of the bottom line from being separated from the through hole on the second surface of the automatic knife 20.
[0055] Preferably, the orthographic projection area of the through hole on the second surface of the movable knife 20 accounts for 50% of the area of the movable knife edge 21 .
[0056] In another specific embodiment, Fig. 9As shown, the second area 202 is horizontally arranged, the first area 201 is inclined relative to the second area 202 , the angle between the first area 201 and the second area 202 is α, 150°<α<180°, and the first matching portion 22 is the first area 201 .
[0057] For example, the angle α between the second area 202 and the first area 201 may be 178°, the angle α between the second area 202 and the first area 201 may be 175°, the angle α between the second area 202 and the first area 201 may be 170°, and so on.
[0058] When the movable knife 20 is in the loose bottom thread switching position, the end of the bottom thread is located between the thread abutment portion 31 of the bottom thread retaining member 30 and the first area 201 on the second surface of the movable knife 20. Since there is a gap between the first area 201 on the second surface of the movable knife 20 and the thread abutment portion 31 of the bottom thread retaining member 30, no force is applied to the end of the bottom thread at the gap, and thus the force of the thread abutment portion 31 of the bottom thread retaining member 30 and the first area 201 on the second surface of the movable knife 20 to clamp the bottom thread is greatly reduced.
[0059] According to an embodiment of the second aspect of the utility model, there is provided a computer embroidery machine, comprising the thread trimming device of the computer embroidery machine in the first aspect.
[0060] The computer embroidery machine has the advantages of the thread trimming device of the computer embroidery machine in the first aspect, through the clearance fit between the thread-receiving portion 31 of the bottom thread holder 30 and the first matching portion 22 of the movable knife 20, that is, there is a gap between the first matching portion 22 of the movable knife 20 and the thread-receiving portion 31 of the bottom thread holder 30, and the gap does not apply force to the thread end of the bottom thread, so that the force of the thread-receiving portion 31 of the bottom thread holder 30 and the first matching portion 22 of the movable knife 20 clamping the bottom thread is greatly reduced, which helps the thread hooking portion of the needle to easily hook up the bottom thread when the needle of the machine head starts embroidery again, thereby avoiding affecting the embroidery efficiency of the computer embroidery machine.
[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0062] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.
[0063] In the description of the present invention, "plurality" means two or more.
[0064] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.
[0065] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A thread trimming device for a computer embroidery machine, characterized in that: include: Shuttle bed, fixed knife, movable knife and bottom line holder, The fixed knife, the movable knife and the bottom line holder are directly or indirectly connected to the shuttle bed. The fixed knife has a fixed knife blade, and the movable knife has a first surface and a second surface arranged opposite to each other, the first surface is provided with a movable knife blade, and the second surface is provided with a first matching portion and a second matching portion. The movable knife reciprocates toward the fixed knife and has a thread cutting switching position and a thread loosening switching position. When the movable knife is in the thread trimming switching position, the second matching portion abuts against the bottom line retaining member; when the movable knife is in the bottom line loosening switching position, the first matching portion has a clearance fit with the bottom line retaining member.
2. The thread trimming device of the computer embroidery machine according to claim 1, characterized in that: The movable knife blade includes a blade end, the second matching portion is arranged close to the blade end, and the first matching portion is arranged away from the blade end.
3. The thread trimming device of the computer embroidery machine according to claim 2, characterized in that: The second surface includes a second area close to the blade end and a first area away from the blade end, the first matching portion is located in the first area, the second matching portion is located in the second area, the first matching portion and the second matching portion are orthographically projected on the moving knife blade, and the orthographic projection formed by the first matching portion and the second matching portion coincides with the moving knife blade.
4. The thread trimming device of the computer embroidery machine according to claim 3, characterized in that: The first matching portion is a groove, and the groove is formed by being recessed from the second surface toward the first surface.
5. The thread trimming device of the computer embroidery machine according to claim 3, characterized in that: The first matching portion is a through hole, and the through hole is formed by penetrating from the second surface to the first surface.
6. The thread trimming device of the computer embroidery machine according to claim 4 or 5, characterized in that: The first matching portion is projected onto the moving knife blade, and the area of the first matching portion's projected area accounts for 30% to 50% of the area of the moving knife blade.
7. The thread trimming device of the computer embroidery machine according to claim 6, characterized in that: The orthographic projection area of the first matching portion accounts for 50% of the area of the movable knife blade.
8. The thread trimming device of the computer embroidery machine according to claim 3, characterized in that: The second area is arranged horizontally, the first area is inclined relative to the second area, the angle between the first area and the second area is α, 150°<α<180°, and the first matching portion is the first area.
9. A computer embroidery machine, characterized in that: A thread trimming device for a computer embroidery machine comprising any one of claims 1-8.