Needle protection structure and multi-needle machine
By designing a first and second limiting plate with a needle protection structure on a multi-needle machine, the problem of needle wobbling from side to side is solved, the needle is quickly stabilized, and the risk of skipped needles is reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JACK SMART SEWING TECHNOLOGY CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-21
AI Technical Summary
The needle protection structure of existing multi-needle machines cannot effectively prevent the needle from shaking in the left and right direction, resulting in a high risk of skipped needles.
A needle protection structure was designed, including a needle protection body, a first limiting plate and a second limiting plate. The first limiting plate prevents the needle from shaking to the right, and the second limiting plate prevents the needle from shaking to the left. The two work together to limit the range of needle shaking in the left and right directions.
It effectively prevents excessive needle vibration, reduces the probability of skipped needles, and achieves rapid needle stabilization.
Smart Images
Figure CN224531228U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sewing technology, and in particular to a needle guard structure and a multi-needle machine. Background Technology
[0002] A multi-needle sewing machine is a type of sewing machine capable of simultaneous sewing with multiple needles. Currently, in a multi-needle machine, the looper moves from front to back, and after the needle inserts into the loop of the top thread, the looper gradually withdraws. When the tip of the looper separates from the needle, the needle vibrates due to the tension of the top thread. If this vibration is excessive, the loop formed by the top thread will become unstable. Consequently, when the looper catches the thread, it may fail to insert into the loop or the tip may puncture the top thread, leading to skipped stitches.
[0003] In related technologies, multi-needle machines are equipped with needle protectors to prevent skipped needles. However, these needle protectors are right-side needle protectors. When the needle vibrates, the needle protector can only prevent the needle from vibrating to the right, but it cannot prevent the needle from vibrating to the left. Therefore, it cannot effectively and quickly stabilize the needle, and the risk of skipped needles still exists. Utility Model Content
[0004] Therefore, it is necessary to provide a needle protector structure and a multi-needle machine to solve the problem that the needle protector of existing multi-needle machines has poor effect on stabilizing the needle.
[0005] This application provides a needle protector structure applied to a multi-needle machine. The multi-needle machine includes a needle, and the needle protector structure includes a needle protector body and a first limiting plate connected to the needle protector body. The needle protector structure also includes a second limiting plate, which is spaced apart from the first limiting plate along the width direction of the needle protector body and connected to the needle protector body. When the needle is inserted between the first limiting plate and the second limiting plate, the first limiting plate and the second limiting plate restrict the movement of the needle along the width direction of the needle protector body.
[0006] In one embodiment, an extension portion is formed at one end of the second limiting plate away from the needle body, and the extension portion is provided corresponding to the needle.
[0007] In one embodiment, along the height direction of the needle body, the upper surface of the second limiting plate is set lower than the upper surface of the first limiting plate.
[0008] In one embodiment, the needle body, the first limiting plate, and the second limiting plate are integrally formed.
[0009] In one embodiment, the needle protector body has a connection hole for connecting the needle protector body to the bent needle holder.
[0010] In one embodiment, the needle body has a through hole for the shank of the bent needle to pass through.
[0011] In one embodiment, the connecting hole is configured as an arc-shaped hole that extends in an arc around the axis of the through hole.
[0012] This application also provides a multi-needle machine, which includes a machine needle, a curved needle, a curved needle frame, and a needle guard structure as described in any of the above embodiments. The needle guard structure is installed on the curved needle frame. The curved needle includes a rod and a needle that are connected to each other. The rod passes through the needle guard structure and is connected to the curved needle frame. The needle is located above the needle guard structure and is used to cooperate with the machine needle.
[0013] In one embodiment, the needle has a needle hole, which is positioned above the upper surface of the second limiting plate when the needle is raised.
[0014] In one embodiment, the needle has a needle hole, and the curved needle has an initial position and an end position. From the initial position toward the end position, when the needle portion of the curved needle moves to the position of the needle, the distance between the tip of the needle and the needle hole is 3 mm; and / or, from the end position toward the initial position, when the needle portion of the curved needle moves to the position of the needle, the distance between the tip of the needle and the needle hole is 1.5 mm; and / or, when the curved needle is in the initial position, the distance from the tip of the needle to the axis of the needle is 2.8 mm; and / or, the multi-needle machine further includes a needle plate, and when the needle moves upward to its limit, the distance from the tip of the needle to the surface of the needle plate is 13 mm.
[0015] Compared with existing technologies, the needle guard structure and multi-needle machine provided in this application have a first limiting plate that prevents the needle from vibrating to the right. Furthermore, this application also includes a second limiting plate to prevent the needle from vibrating to the left. Thus, the cooperation of the first and second limiting plates limits the range of needle vibration in the left-right direction, effectively preventing excessive needle vibration. This facilitates rapid needle stabilization and significantly reduces the probability of skipped needles. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A schematic diagram of the structure of a multi-needle machine according to an embodiment of this application;
[0018] Figure 2 A partial structural schematic diagram of a multi-needle machine according to an embodiment of this application;
[0019] Figure 3 for Figure 2 Side view of the structure shown;
[0020] Figure 4 A schematic diagram illustrating the cooperation between the needle guard structure, curved needle, and machine needle according to an embodiment provided in this application;
[0021] Figure 5 A schematic diagram of the structure of the needle protector provided in this application;
[0022] Figure 6 A cross-sectional view of the needle guard structure in one embodiment provided in this application when it is used in conjunction with a curved needle and a machine needle.
[0023] The symbols in the diagram represent the following meanings:
[0024] 100. Multi-needle machine; 10. Needle protection structure; 11. Needle protection body; 111. Connecting hole; 112. Through hole; 12. First limiting plate; 13. Second limiting plate; 131. Extension; 20. Needle; 21. Needle hole; 30. Curved needle; 31. Rod; 32. Needle; 40. Curved needle frame; 50. Machine body. Detailed Implementation
[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.
[0027] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.
[0030] A multi-needle sewing machine is a type of sewing machine capable of simultaneous sewing with multiple needles. Currently, in a multi-needle machine, the looper moves from front to back, and after the needle inserts into the loop of the top thread, the looper gradually withdraws. When the tip of the looper separates from the needle, the needle vibrates due to the tension of the top thread. If this vibration is excessive, the loop formed by the top thread will become unstable. Consequently, when the looper catches the thread, it may fail to insert into the loop or the tip may puncture the top thread, leading to skipped stitches.
[0031] In related technologies, multi-needle machines are equipped with needle protectors to prevent skipped needles. However, these needle protectors are right-side needle protectors. When the needle vibrates, the needle protector can only prevent the needle from vibrating to the right, but it cannot prevent the needle from vibrating to the left. Therefore, it cannot effectively and quickly stabilize the needle, and the risk of skipped needles still exists.
[0032] Please see Figures 1-6To address the problem of poor needle stability achieved by needle protectors in existing multi-needle machines, this application provides a needle protector structure 10. This needle protector structure 10 is applied to a multi-needle machine 100, which also includes a machine body 50, a needle 20, and a curved needle 30. The needle 20 and the curved needle 30 are both movably mounted on the machine body 50, and the needle 20 and the curved needle 30 cooperate to achieve the effect of interlacing the threads on the needle 20 and the curved needle 30, so as to form stitches.
[0033] For ease of explanation, this application defines as follows: Figure 1 The directions shown are up and down, left and right, and front and back. The needle 20 moves in the up and down direction, and the curved needle 30 swings in the front and back direction.
[0034] like Figures 2-6 As shown, the needle protection structure 10 includes a needle protection body 11, a first limiting plate 12, and a second limiting plate 13. The first limiting plate 12 is connected to the needle protection body 11. The second limiting plate 13 is spaced apart from the first limiting plate 12 along the width direction of the needle protection body 11 and is connected to the needle protection body 11. When the needle 20 is inserted between the first limiting plate 12 and the second limiting plate 13, the first limiting plate 12 and the second limiting plate 13 restrict the movement of the needle 20 along the width direction of the needle protection body 11. Here, the first limiting plate 12 is connected to the right side of the needle protection body 11, and the second limiting plate 13 is connected to the left side of the needle protection body 11.
[0035] Understandably, the first limiting plate 12 serves to prevent the needle 20 from vibrating to the right in the relevant structure. Furthermore, this application also provides a second limiting plate 13, which prevents the needle 20 from vibrating to the left. Thus, through the cooperation of the first limiting plate 12 and the second limiting plate 13, the range of vibration of the needle 20 in the left-right direction is limited, effectively preventing excessive vibration of the needle 20. Therefore, this facilitates the rapid stabilization of the needle 20, thereby greatly reducing the probability of skipped needles.
[0036] Furthermore, in one embodiment, as Figures 3-5 As shown, an extension portion 131 extends downward from the end of the second limiting plate 13 away from the needle body 11, and the extension portion 131 is correspondingly disposed with the needle 20. In this way, the contact area between the second limiting plate 13 and the needle 20 can be increased, further improving the rapid stabilization effect when the needle 20 vibrates.
[0037] To prevent the second limiting plate 13 from adversely affecting the process of forming a loop of thread on the needle 20, in one embodiment, the upper surface of the second limiting plate 13 is set lower than the upper surface of the first limiting plate 12 along the height direction of the needle body 11. This reduces the probability of interference between the second limiting plate 13 and the loop of thread, improving the reliability of the structure. This also prevents the subsequent bent needle 30 from failing to pass through the loop of thread or puncturing the thread, reducing the probability of skipped needles.
[0038] Specifically, in this embodiment, the upper surface of the second limiting plate 13 can be flush with the upper surface of the needle protector body 11 to further reduce the probability of interference with the wire loop and facilitate processing. Of course, the upper surface of the second limiting plate 13 can also be lower than the upper surface of the needle protector body 11, which can be reasonably set according to actual needs.
[0039] Furthermore, in one embodiment, the needle 20 has a needle hole 21, which is positioned above the upper surface of the second limiting plate 13 when the needle 20 is raised. By reasonably setting the position of the needle 20, it can be further ensured that the second limiting plate 13 will not adversely affect the process of the needle 20 forming a loop, thus improving reliability.
[0040] In one embodiment, such as Figure 5 As shown, the needle protector body 11, the first limiting plate 12, and the second limiting plate 13 are integrally formed to ensure the overall structural strength of the needle protector structure 10.
[0041] In one embodiment, such as Figure 6 As shown, the multi-needle machine 100 also includes a looper frame 40, on which the looper 30 and the needle guard structure 10 are mounted, thereby realizing the synchronous movement of the needle guard structure 10 and the looper 30.
[0042] Specifically, the needle protector body 11 has a connecting hole 111 for connecting the needle protector body 11 to the bending needle holder 40. This securely mounts the needle protector structure 10, preventing malfunctions in its connection with the machine needle 20 due to shaking. The connecting hole 111 can be secured with fasteners such as bolts or screws, allowing for easy locking of the needle protector structure 10 to the bending needle holder 40. The connection is simple and easy to disassemble, facilitating subsequent maintenance.
[0043] Typically, the curved needle 30 includes a rod 31 and a needle 32 connected to each other. The curved needle 30 is connected to the curved needle holder 40 via the rod 31, and the needle 32 is located above the needle guard structure 10 for mating with the machine needle 20. To improve the reliability of the position between the curved needle 30 and the needle guard structure 10, the rod 31 passes through the needle guard structure 10 and connects to the curved needle holder 40. Figures 4-6 As shown, the needle body 11 has a through hole 112 for the rod 31 of the bent needle 30 to pass through.
[0044] Furthermore, in one embodiment, the connecting hole 111 is configured as an arc-shaped hole, extending in an arc around the axis of the through hole 112. This facilitates the adjustment of the position of the needle guard structure 10 to better achieve cooperation with the needle 20.
[0045] It should be noted that since the adjustment required for the needle guard structure 10 is usually small, the connecting hole 111 does not need to be a large-angle arc hole; it only needs to be able to meet fine adjustments. After the needle guard structure 10 is adjusted to the corresponding position relative to the bent needle 30 or the machine needle 20, it is then locked by fasteners such as bolts or screws.
[0046] When the multi-needle machine 100 is sewing, the looper 30 has an initial position and an end position. The initial position is the position when the looper 30 swings forward to its limit, and the end position is the position when the looper 30 swings backward to its limit.
[0047] This application specifically provides parameters for setting the bent needle 30 and the machine needle 20 to ensure that the second limiting plate 13 will not interfere with the loop formed on the bent needle 30 or the machine needle 20. It is worth noting that this does not mean that only this parameter setting can achieve the anti-interference function; it can also be set to other reasonable parameters.
[0048] For example, in the direction from the initial position to the end position, when the needle portion 32 of the bent needle 30 moves to the position of the needle 20, the distance between the tip of the needle portion 32 and the needle hole 21 is 3 mm; and / or, in the direction from the end position to the initial position, when the needle portion 32 of the bent needle 30 moves to the position of the needle 20, the distance between the tip of the needle portion 32 and the needle hole 21 is 1.5 mm; and / or, when the bent needle 30 is in the initial position, the distance from the tip of the needle portion 32 to the axis of the needle 20 is 2.8 mm; and / or, the multi-needle machine 100 also includes a needle plate, and when the needle 20 moves upward to its limit, the distance from the tip of the needle 20 to the surface of the needle plate is 13 mm.
[0049] This application also provides a multi-needle sewing machine 100, which includes a machine body 50, needles 20, loopers 30, looper frame 40, and a needle guard structure 10 of any of the above embodiments. In order to realize synchronous sewing of multiple needles, the number of needles 20, loopers 30 and needle guard structures 10 are all multiple and arranged at intervals in the left-right direction, and are arranged in a one-to-one correspondence.
[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0051] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.
Claims
1. A needle protection structure applied to a multi-needle machine, the multi-needle machine including a needle (20), the needle protection structure including a needle protection body (11) and a first limiting plate (12), the first limiting plate (12) being connected to the needle protection body (11); Its features are, The needle protection structure also includes a second limiting plate (13), which is spaced apart from the first limiting plate (12) along the width direction of the needle protection body (11) and connected to the needle protection body (11); When the needle (20) is inserted between the first limiting plate (12) and the second limiting plate (13), the first limiting plate (12) and the second limiting plate (13) are used to restrict the movement of the needle (20) along the width direction of the needle body (11).
2. The needle guard structure according to claim 1, characterized in that, The second limiting plate (13) extends downward from one end away from the needle body (11) to form an extension (131), and the extension (131) is correspondingly provided with the needle (20).
3. The needle guard structure according to claim 1, characterized in that, Along the height direction of the needle body (11), the upper surface of the second limiting plate (13) is set lower than the upper surface of the first limiting plate (12).
4. The needle guard structure according to claim 1, characterized in that, The needle body (11), the first limiting plate (12) and the second limiting plate (13) are integrally formed.
5. The needle guard structure according to claim 1, characterized in that, The needle protector body (11) is provided with a connection hole (111), which is used to connect the needle protector body (11) to the bent needle holder (40).
6. The needle guard structure according to claim 5, characterized in that, The needle body (11) has a through hole (112) for the rod (31) of the bent needle (30) to pass through.
7. The needle guard structure according to claim 6, characterized in that, The connecting hole (111) is configured as an arc-shaped hole, which extends in an arc shape around the axis of the through hole (112).
8. A multi-needle machine, characterized in that, The device includes a needle (20), a bent needle (30), a bent needle holder (40), and a needle guard structure as described in any one of claims 1 to 7. The needle guard structure is mounted on the bent needle holder (40). The bent needle (30) includes a rod (31) and a needle (32) connected to each other. The rod (31) passes through the needle guard structure and is connected to the bent needle holder (40). The needle (32) is located above the needle guard structure and is used to cooperate with the needle (20).
9. The multi-needle machine according to claim 8, characterized in that, The needle (20) has a needle hole (21), which is positioned above the upper surface of the second limiting plate (13) when the needle (20) is raised.
10. The multi-needle machine according to claim 8, characterized in that, The needle (20) has a needle hole (21), and the bent needle (30) has an initial position and an end position. From the initial position toward the end position, when the needle part (32) of the bent needle (30) moves to the position of the needle (20), the distance between the tip of the needle part (32) and the needle hole (21) is 3mm. And / or, from the end position toward the initial position, when the needle part (32) of the bent needle (30) moves to the position of the needle (20), the distance between the tip of the needle part (32) and the needle hole (21) is 1.5 mm; And / or, when the bent needle (30) is in the initial position, the distance from the tip of the needle (32) to the axis of the needle (20) is 2.8 mm; And / or, the multi-needle machine also includes a needle plate, wherein when the needle (20) moves upward to its limit, the distance from the tip of the needle (20) to the surface of the needle plate is 13 mm.