A line of defense bubble run out shuttle hook, shuttle assembly and sewing machine
By setting an arrangement groove and a limiting structure on the front side of the needle hole of the shuttle frame, the problem of thread leakage is solved, the stability and continuity of the sewing machine are improved, and the working reliability of the rotary hook assembly is ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO YINZHOU YONGYAO SEWING MACHINERY
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-21
AI Technical Summary
A thread bubble in the sewing machine's rotary hook can easily escape through the needle eye, leading to the risk of skipped stitches and affecting the stability and continuity of the sewing process.
An arrangement groove is set on the front side of the needle hole of the shuttle frame, and the symmetrical or gradually decreasing spacing of the limiting sidewalls and limiting slopes are used to limit the line bubble, providing a stable arrangement space and preventing the line bubble from running out.
This effectively reduces the risk of the thread bubble escaping from the shuttle body, improves the stability and continuity of the sewing process, and ensures the working stability and reliability of the rotary hook assembly.
Smart Images
Figure CN224531231U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sewing machine equipment, and in particular to a bobbin-proof shuttle frame, shuttle assembly, and sewing machine. Background Technology
[0002] The rotary hook of a sewing machine is one of the most crucial and precise components of the machine. Its function is to work with the needle to interweave the top and bottom threads to form a lockstitch.
[0003] In related technologies, a sewing machine shuttle includes a fixed shuttle frame, a bobbin sleeve fitted inside the shuttle frame, and a shuttle bed coaxially and rotatably mounted on the outer end of the shuttle frame. The shuttle frame has a needle hole for the needle to pass through, and the shuttle bed has a bobbin tip for hooking the top thread. The rear end of the needle tip has a thread hole perpendicular to its length for arranging the top thread. On the side of the needle entering the thread hole, a long groove is formed along the length for straightening the top thread; on the side of the needle exiting the thread hole, a short groove is formed along the length to avoid the bobbin tip. A needle guard is provided on the side wall of the shuttle frame facing the short groove from the needle hole. When the sewing machine is running, the needle moves up and down through the needle hole, causing the top thread to form a thread bubble on one side of the short groove. The high-speed rotating shuttle bed hooks and expands the thread bubble formed by the needle through the bobbin tip, rotating it once and allowing it to pass around the bobbin sleeve. After weaving with the bobbin thread, the thread bubble is released, forming a lockstitch.
[0004] Regarding the aforementioned technologies, the inventors believe that the thread bubble formed by the needle can easily escape from the needle hole of the sewing machine shuttle, posing a risk that the shuttle tip may not be able to catch the thread bubble, resulting in skipped stitches. Utility Model Content
[0005] In order to reduce the risk of sewing machine skipping stitches due to thread escaping from the needle hole, this application provides a thread escaping prevention system for the rotary hook frame, a rotary hook assembly, and a sewing machine.
[0006] In a first aspect, this application provides a method to prevent bubble leakage from a rotary shuttle frame, employing the following technical solution: A shuttle frame for preventing thread bubbles from escaping includes a shuttle frame body, the shuttle frame body having inner and outer surfaces that penetrate the side wall of the shuttle frame body and have needle holes for needles to pass through; the needle holes have arrangement slots for arranging thread bubbles on one side of the long groove facing the needle, and the shuttle frame body has limiting sidewalls on both sides of the arrangement slots.
[0007] By adopting the above technical solution, the arrangement groove located on the front side of the needle hole can provide arrangement space for the thread bubble, and the limiting sidewall can limit the thread bubble, which helps to reduce the risk of the thread bubble running out of the shuttle body and causing the sewing machine to skip stitches, thereby helping to ensure the stability and continuity of the sewing process.
[0008] Optionally, the two limiting sidewalls are symmetrically arranged and the distance between the two limiting sidewalls remains unchanged along the direction of needle insertion.
[0009] By adopting the above technical solution, two limiting sidewalls that are symmetrically arranged and whose spacing remains unchanged along the needle insertion direction can stably limit the thread bubble in the arrangement groove, reducing the possibility of the thread bubble shifting left and right or running out during the movement of the needle, which helps to ensure the smoothness of the sewing process.
[0010] Optionally, the two limiting sidewalls are symmetrically arranged and the distance between the two limiting sidewalls gradually decreases along the direction of needle insertion.
[0011] By adopting the above technical solution, the symmetrically arranged limiting sidewalls with gradually decreasing spacing along the needle insertion direction can better guide and constrain the thread bubble, which helps to improve the limiting effect on the thread bubble, making the thread bubble more stable during the needle movement and helping to reduce the situation where the thread bubble runs out of the shuttle body.
[0012] Optionally, the bottom of the arrangement groove has a limiting slope for the fitting and arrangement of the wire bubble.
[0013] By adopting the above technical solution, the limiting inclined surface provides space for the line bubble to fit snugly, and can cooperate with the two limiting side walls to constrain the position of the line bubble, thereby further reducing the risk of the line bubble moving randomly and running out of the shuttle frame body.
[0014] Optionally, the angle between the limiting inclined surface and the depth direction of the needle hole is 1-45°.
[0015] By adopting the above technical solution, the wick can fit better against the limiting slope at the bottom of the arrangement groove, which helps to optimize the limiting effect of the arrangement groove on the wick and further reduces the risk of the wick running out of the shuttle body.
[0016] Optionally, the shuttle body has a limiting plane at the bottom of the arrangement groove that is parallel to the direction of movement of the needle. The limiting plane has a limiting side perpendicular to the limiting plane at one end near the axis of the shuttle body. The two ends of the limiting side are respectively connected to the two limiting side walls.
[0017] By adopting the above technical solution, the limiting plane at the bottom of the groove is parallel to the direction of needle movement, which helps the thread bubble to fit stably. The limiting side at the end of the limiting plane can further constrain the position of the thread bubble. Combined with the limiting sidewall, the risk of the thread bubble running out of the shuttle frame can be reduced more effectively.
[0018] Secondly, this application provides a rotary hook assembly, which adopts the following technical solution: A rotary shuttle assembly includes the aforementioned anti-bubble rotary shuttle frame.
[0019] Thirdly, this application provides a sewing machine, which adopts the following technical solution: A sewing machine including the aforementioned rotary hook assembly.
[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. A method for preventing thread from running out of a rotary shuttle frame, comprising a shuttle frame body; by providing a groove on the front side of the needle hole, a space can be provided for the thread to be arranged, and the thread is limited by a limiting sidewall, which helps to reduce the risk of the sewing machine skipping stitches due to the thread running out of the shuttle frame body, thereby helping to ensure the stability and continuity of the sewing process. 2. A rotary shuttle assembly, including a structure designed to prevent the line bubble from running out of the rotary shuttle frame; the structure design of preventing the line bubble from running out of the rotary shuttle frame can ensure that the line bubble is stably arranged in a suitable position and is not easy to run out, which helps to improve the stability and reliability of the rotary shuttle assembly. 3. A sewing machine, comprising a rotary hook assembly having a function of preventing the thread bubble from running out of the rotary hook frame; by utilizing the function of preventing the thread bubble from running out of the rotary hook frame, the sewing machine has the function of limiting the position of the thread bubble and preventing the thread bubble from running out of the rotary hook frame, which helps to improve the stability of thread use during sewing. Attached Figure Description
[0021] Figure 1 This is a cross-sectional view of the needle along its length in Example 1.
[0022] Figure 2 This is a schematic diagram of the structure of the anti-bubble runout shuttle frame in Example 1.
[0023] Figure 3 This is a schematic diagram of the arrangement of the slots in Example 1.
[0024] Figure 4 This is a cross-sectional view of the needle in Example 1 when it is in contact with the arrangement groove at the needle hole.
[0025] Figure 5 This is a schematic diagram of the arrangement of the slots in Example 2.
[0026] Figure 6 This is a cross-sectional view of the needle in Example 2, showing its interaction with the arrangement groove when the needle passes through the needle hole.
[0027] Figure 7 This is a schematic diagram of the rotary shuttle assembly in Example 3.
[0028] Figure 8 This is a schematic diagram of the rotary shuttle bed in Example 3.
[0029] Explanation of reference numerals in the attached drawings: 1. Needle; 11. Needle handle; 12. Needle cone; 13. Needle body; 131. Needle hole; 132. Long groove; 133. Short groove; 14. Needle tip; 2. Shuttle frame body; 21. Shuttle frame base plate; 22. Shuttle frame side plate; 221. Rotating mounting part; 222. Needle hole; 223. Arrangement groove; 224. Limiting side wall; 225. Limiting inclined surface; 226. Limiting plane; 227. Limiting side; 24. Arrangement cavity; 3. Rotary shuttle bed; 31. Shuttle bed body; 311. Arrangement slide rail; 312. Rotary shuttle tip; 313. Arrangement gap; 32. Rotary shuttle skin. Detailed Implementation
[0030] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.
[0031] Example 1 This application discloses a shuttle frame for preventing bubble runoff. (Refer to...) Figure 1 The needle 1 includes, along its length, a needle shank 11, a needle cone 12, a needle body 13, and a needle tip 14 connected in sequence. The diameter of the needle cone 12 connected to the needle shank 11 is larger than the diameter of its connection to the needle body 13. The needle body 13 has a needle hole 131 at its end near the needle tip 14, extending through its inner and outer surfaces and used for arranging the thread. At the insertion end of the needle hole 131, the needle body 13 has a long groove 132 extending along the length of the needle 1 and used for limiting the thread. At the exit end of the needle hole 131, the needle body 13 has a short groove 133 extending along the length of the needle 1 and used to avoid the rotary hook tip 312.
[0032] Reference Figure 2 The anti-bubble shuttle frame includes a shuttle frame body 2. The shuttle frame body 2 includes a shuttle frame base plate 21, a shuttle frame side plate 22 vertically connected to the outer edge of the shuttle frame base plate 21, and a bobbin shaft vertically arranged at the center of the shuttle frame base plate 21. The shuttle side plate and the shuttle frame base plate cooperate to form an arrangement cavity 24 for installing the bobbin sleeve. The outer side wall of the shuttle side plate is circumferentially provided with a rotating mounting part 221 for rotating the shuttle frame body 2 along the rotation direction of the shuttle frame body 2. The outer side wall of the shuttle side plate 22 is a smooth arc surface, reducing interference from the circumferential winding of the surface thread during operation.
[0033] Reference Figure 3 and Figure 4The shuttle frame side plate 22 has needle holes 222 that penetrate the inner and outer surfaces of the shuttle frame side plate 22 and are used for the needle 1 to pass through. The needle holes 222 have a sizing groove 223 for arranging thread bulbs on one side of the elongated groove 132 facing the needle 1. Symmetrically arranged limiting sidewalls 224 are formed on both sides of the sizing groove 223 on the shuttle frame side plate 22. The distance between the two limiting sidewalls 224 gradually decreases along the direction in which the needle 1 enters. The bottom of the sizing groove 223 has a limiting inclined surface 225 for the close-fitting arrangement of thread bulbs. The angle formed between the limiting inclined surface 225 and the axis of the needle 1 can be 1-45°. In this embodiment, the maximum distance 'a' between the opening and bottom of the sizing groove 223 is 0.35 mm. The angle formed between the limiting inclined surface 225 and the axis of the needle 1 is 15°.
[0034] The implementation principle of Example 1 is as follows: When the needle passes through the needle hole and forms a thread bubble at the needle hole, the arrangement groove 223 located in front of the needle hole 222 can provide arrangement space for the thread bubble, and the limiting side wall 224 is used to limit the thread bubble, which helps to reduce the risk of the thread bubble running out of the shuttle body and causing the sewing machine to skip stitches, thereby helping to ensure the stability and continuity of the sewing process.
[0035] Example 2 Except for the structure of the arrangement slot 223, the structure of the anti-bubble escape shuttle frame in this application is the same as that in Embodiment 1.
[0036] Reference Figure 5 and Figure 6 Two limiting sidewalls 224 are symmetrically arranged, and the distance between the two shuttle sidewalls remains constant along the direction in which the needle 1 enters. The bottom of the arrangement groove 223 has a limiting plane 226 arranged parallel to the direction of movement of the needle 1. At one end of the limiting plane 226 near the axis of the shuttle frame side plate 22, a limiting side surface 227 perpendicular to the limiting plane 226 is provided. The two ends of the limiting side surface 227 are respectively connected to the two limiting sidewalls 224. In this embodiment, the distance b from the opening of the arrangement groove 223 to the limiting plane 226 is 0.35 mm.
[0037] Example 3 This application discloses a rotary hook assembly. (Refer to...) Figure 7 The rotary shuttle assembly includes a rotary shuttle bed 3, a shuttle core sleeve, and the anti-bubble-out rotary shuttle frame as described in Embodiment 1. The shuttle frame body 2 is rotatably mounted within the rotary shuttle bed 3. The anti-bubble-out rotary shuttle frame's structural design ensures that the bubble is stably positioned in a suitable location and is less likely to escape, thus improving the stability and reliability of the rotary shuttle assembly.
[0038] Reference Figure 7 and Figure 8The rotary shuttle bed 3 includes a shuttle bed body 31, a rotary shuttle ring arranged outside the shuttle bed body 31, and a rotary shuttle skin 32 arranged outside the rotary shuttle ring. The shuttle bed body 31 has an arrangement rail 311 on its inner sidewall for sliding the rotary mounting part 221 of the shuttle frame body. The shuttle bed body 31 has a rotary shuttle tip 312 that cooperates with the needle 1 and is used to hook the thread bubble. When the needle tip of the needle 1 is positioned in the needle hole 222, the short groove 133 located at the rear end of the needle tip can avoid the rotary shuttle tip 312, thereby reducing the risk of collision between the needle 1 and the rotary shuttle tip 312. An arrangement gap 313 is formed between the shuttle bed body 31 and the sidewall of the shuttle frame for arranging the surface thread for winding. The sidewall of the shuttle bed body 31 facing the arrangement gap 313 is a smooth arc surface, reducing interference from the outer sidewall on the circumferential winding of the surface thread during operation.
[0039] Example 4 Except for the anti-bubble ejection shuttle frame, which differs from Example 3, the rest of the structure in this embodiment is identical to that of Example 3. The anti-bubble ejection shuttle frame in this embodiment is the adjustable shuttle frame from Example 2.
[0040] Example 5 This application discloses a sewing machine. The sewing machine includes the rotary hook assembly as described in embodiment 3.
[0041] Example 6 This application discloses a sewing machine. The sewing machine includes the rotary hook assembly as described in embodiment 4.
[0042] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A type of anti-bubble spray shuttle frame, characterized in that, The device includes a shuttle frame body (2), which has inner and outer surfaces that penetrate the sidewall of the shuttle frame body (2) and are used for the needle (1) to pass through. The needle hole (222) is provided with an arrangement groove (223) for arranging the thread bubble on one side of the long groove (132) facing the needle (1). The shuttle frame body (2) forms limiting sidewalls (224) on both sides of the arrangement groove (223).
2. The anti-bubble escape rotary shuttle frame according to claim 1, characterized in that, The two limiting sidewalls (224) are symmetrically arranged and the distance between the two limiting sidewalls (224) remains unchanged along the direction in which the needle (1) enters.
3. The anti-bubble escape rotary shuttle frame according to claim 1, characterized in that, The two limiting sidewalls (224) are symmetrically arranged and the distance between the two limiting sidewalls (224) gradually decreases along the direction in which the needle (1) penetrates.
4. The anti-bubble escape rotary shuttle frame according to claim 1, characterized in that, The bottom of the arrangement groove (223) has a limiting slope (225) for the fitting and arrangement of the wire bubble.
5. A shuttle frame for preventing bubble runout according to claim 4, characterized in that, The angle between the limiting inclined surface (225) and the depth direction of the through-hole (222) is 1-45°.
6. The anti-bubble escape rotary shuttle frame according to claim 1, characterized in that, The shuttle body (2) has a limiting plane (226) at the bottom of the arrangement groove (223) that is parallel to the movement direction of the needle (1). The limiting plane (226) has a limiting side (227) perpendicular to the limiting plane (226) at one end near the axis of the shuttle body. The two ends of the limiting side (227) are respectively connected to the two limiting side walls (224).
7. A rotary shuttle assembly, characterized in that, Includes the anti-bubble runout rotary shuttle frame as described in any one of claims 1-6.
8. A sewing machine, characterized in that, Includes the rotary shuttle assembly as described in claim 7.