Sewing machine needle bar thread hook, pricking mechanism and sewing machine

Abstract

The utility model provides a sewing machine needle bar thread hook, a pricking mechanism and a sewing machine, which are applied to the sewing machine. Comprising a wire hook main body and a wire hook skirt edge, the wire hook skirt edge is arranged on the wire hook main body, and a gap between the wire hook skirt edge and the wire hook main body is a wire passing opening; an outer thread accommodating part is arranged on the outer wall of the thread hook main body on the upper side of the thread passing opening, and an inner thread accommodating part is arranged on the inner wall of the thread hook skirt edge on the lower side of the thread passing opening; an upper thread is wound into the needle rod thread hook through the thread passing opening and is positioned in the outer thread accommodating part and the inner thread accommodating part. The outer thread containing part is arranged on the outer wall of the thread hook body, the inner thread containing part is arranged on the inner wall of the thread hook skirt edge, an upper thread is located in the inner thread containing part and the outer thread containing part, meanwhile, the outer thread containing part has a certain inclination from top to bottom, the upper thread is tightly attached to the surface of the outer thread containing part, and the stress between the upper thread and the needle bar thread hook can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine equipment technology, and in particular to a sewing machine needle bar and thread hook, a material-piercing mechanism, and a sewing machine. Background Technology

[0002] When a sewing machine is in operation, the thread needs to pass through a needle bar hook before passing through the needle to reduce thread sway and improve sewing stability. Current needle bar hooks often have one or more thread guide holes. During normal sewing, the thread passes through multiple thread guide holes, creating contact stress with the needle bar hook. As the needle moves up and down, the thread alternates between tension and relaxation within the thread guide holes, experiencing significant stress and resulting in considerable thread sway. Furthermore, threading is frequently required during sewing, not only for the initial threading but also when changing threads, during thread slippage, or when the thread breaks. The hole-type threading method is inconvenient, taking considerable time each time. While relatively simple for employees with good eyesight, it is quite difficult for those with poor eyesight. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a sewing machine needle bar thread hook, a material feeding mechanism and a sewing machine, so as to solve the problems in the prior art where the thread is subjected to large stress and has a large swing amplitude during sewing work, and the existing hole-type threading method is too time-consuming and has low work efficiency.

[0004] To achieve the above objectives, this utility model provides a sewing machine needle bar hook for use in a sewing machine; it includes a hook body and a hook skirt, the hook skirt being disposed on the hook body, and a gap between the hook skirt and the hook body forming a thread passage opening; an outer thread receiving portion is formed on the outer wall of the hook body above the thread passage opening, and an inner thread receiving portion is formed on the inner wall of the hook skirt below the thread passage opening; the top thread passes through the thread passage opening and winds into the needle bar hook, with the top thread located in the outer thread receiving portion and the inner thread receiving portion.

[0005] Preferably, the outer content line portion and the inner content line portion are located in the same vertical plane.

[0006] Preferably, the outer containment line portion is a fan-shaped notch, the lower end of the outer containment line portion has a greater arc than the upper end, the outer containment line portion has a certain slope from top to bottom, and the surface line is closely attached to the surface of the outer containment line portion.

[0007] Preferably, the hook body is annular, and an extension portion is provided at the bottom end of the hook body. One end of the hook skirt is fixed to the extension portion, and the hook skirt extends in an arc shape. The gap between the lower end face of the hook body and the upper end face of the hook skirt is a thread passage opening.

[0008] Preferably, the extension arc of the hook skirt is greater than the annular arc of the hook body, and the end of the hook skirt away from the extension is located on the outside of the hook body projected in the vertical direction.

[0009] To achieve the above or other objectives, this utility model also discloses a thread-piercing mechanism for use in a sewing machine. The thread-piercing mechanism includes a lower sleeve thread hook, a needle bar, and a needle. The lower sleeve thread hook is disposed on the sewing machine head, the needle bar is vertically detachable within the sewing machine head, and the needle is disposed at the bottom end of the needle bar. The needle has a thread-passing hole. The needle bar has a needle bar connecting hole. The needle bar is provided with the aforementioned sewing machine needle bar thread hook. The thread hook body has a mounting hole, the needle bar connecting hole is aligned with the mounting hole, and a fastener passes through both. The mounting hole is located on the left, right, or rear side of the needle bar via the needle bar connecting hole. The top thread passes through the lower sleeve thread hook, winds through the thread-passing opening into the needle bar thread hook, and then passes through the thread-passing hole of the needle.

[0010] Preferably, the needle rod connecting hole is a threaded hole, and the fastener is a screw or bolt.

[0011] Preferably, the plane connecting the thread-passing part of the lower bushing hook and the thread-passing hole of the needle is located between the two ends of the hook skirt.

[0012] To achieve the above or other objectives, this utility model also discloses a sewing machine, including the sewing machine needle bar and thread hook described above.

[0013] As described above, the sewing machine needle bar and thread hook, the fabric insertion mechanism, and the sewing machine involved in this utility model have the following beneficial effects:

[0014] 1. The present invention relates to a sewing machine needle bar hook, a fabric insertion mechanism, and a sewing machine. The outer wall of the hook body has an outer thread portion, and the inner wall of the hook skirt has an inner thread portion. The top thread is located between the inner thread portion and the outer thread portion to improve the stability of the top thread. At the same time, the outer thread portion has a certain slope from top to bottom, and the top thread is in close contact with the surface of the outer thread portion. During sewing operations, the stress between the top thread and the needle bar hook can be effectively reduced.

[0015] 2. The sewing machine needle bar and thread hook, the needle insertion mechanism, and the sewing machine involved in this utility model have a thread hook skirt located on the lower side of the thread hook body. The thread hook body and the thread hook skirt are provided with a thread passage opening. The end of the thread hook skirt away from the thread hook body is located on the outer side of the vertical projection of the thread hook body. In this way, the thread can swing directly from the end of the thread hook skirt into the thread passage opening, which solves the problem that the threading process is difficult and time-consuming in the existing hole-type threading method, and improves the convenience of threading. Attached Figure Description

[0016] Figure 1 This is a spatial schematic diagram of the sewing machine needle bar and thread hook, the material-piercing mechanism, and the sewing machine of this utility model;

[0017] Figure 2 This is a left view of the sewing machine needle bar thread hook installed on the needle bar according to this utility model;

[0018] Figure 3 This is a front view of the sewing machine needle bar thread hook mounted on the needle bar according to this utility model;

[0019] Figure 4 This is a spatial diagram of the first angle of the sewing machine needle bar and thread hook of this utility model;

[0020] Figure 5 This is a second-angle spatial schematic diagram of the sewing machine needle bar and thread hook of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Sewing machine head; 2. Top thread; 3. Lower lining thread hook; 4. Needle bar thread hook; 41. Mounting hole; 42. Outer thread section; 43. Inner thread section; 44. Thread guide opening; 45. Thread hook body; 46. Thread hook skirt; 47. Extension section; 5. Needle; 501. Thread guide hole; 6. Needle bar. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0025] like Figures 1-5 As shown, this utility model provides a sewing machine needle bar hook for use in a sewing machine; it includes a hook body 45 and a hook skirt 46. The hook skirt 46 is disposed on the hook body 45, and there is a gap between the hook skirt 46 and the hook body 45, which is a thread passage opening 44; an outer thread receiving portion 42 is provided on the outer wall of the hook body 45 above the thread passage opening 44, and an inner thread receiving portion 43 is provided on the inner wall of the hook skirt 46 below the thread passage opening 44; the top thread 2 passes through the thread passage opening 44 and is wound into the needle bar hook 4, and the top thread 2 is located in the outer thread receiving portion 42 and the inner thread receiving portion 43.

[0026] The sewing machine needle bar hook of this utility model has a top thread 2 that is wound into the needle bar hook 4 through a thread pass-through opening 44. The top thread 2 is located between the outer thread portion 42 and the inner thread portion 43. During sewing, this effectively reduces the swing of the top thread 2 in the thread pass-through opening 44 and effectively improves the stability of the top thread 2. At the same time, the top thread 2 is in close contact with the surface of the outer thread portion 42, which effectively reduces the stress between the top thread 2 and the needle bar hook 4.

[0027] Preferred, such as Figures 3-5 As shown, the outer thread portion 42 and the inner thread portion 43 are located in the same vertical plane. Since the top thread 2 is simultaneously provided in both the outer thread portion 42 and the inner thread portion 43, the vertical plane containing the outer thread portion 42 and the inner thread portion 43 is the trajectory of the top thread 2. The top thread 2 passes vertically through the thread opening 44, ensuring smooth transport of the top thread 2 during sewing and avoiding excessive bending of the top thread 2, which could lead to thread jamming or excessive stress.

[0028] Preferred, such as Figure 3 , Figure 4As shown, the outer thread portion 42 is a fan-shaped notch, with the lower end of the outer thread portion 42 having a greater curvature than the upper end. The outer thread portion 42 has a certain slope from top to bottom, with the slope approaching the inner wall of the hook body 45. The top thread 2 is in close contact with the surface of the outer thread portion 42, thus reducing the contact stress between the top thread 2 and the needle bar hook 4 and limiting the range of movement of the top thread 2, effectively ensuring the stability of the top thread 2 during sewing.

[0029] Preferred, such as Figure 4 , Figure 5 As shown, the hook body 45 is annular, and an extension portion 47 extends from the bottom end of the hook body 45. One end of the hook skirt 46 is fixed to the extension portion 47, and the hook skirt 46 extends in an arc shape. The gap between the lower end face of the hook body 45 and the upper end face of the hook skirt 46 is the thread passage opening 44. In this embodiment, the gap between the lower end face of the hook body 45 and the upper end face of the hook skirt 46 is the thread passage opening 44. In this embodiment, the hook body 45, the hook skirt 46, and the extension portion 47 are a single piece. In other embodiments, the hook body 45, the hook skirt 46, and the extension portion 47 may also be separate pieces. The needle 5 and the needle bar hook 4 are both mounted on the needle bar 6, and the needle bar 6 and the lower bushing hook 3 are mounted in the sewing machine head 1.

[0030] Preferred, such as Figure 4 , Figure 5 As shown, the extension arc of the hook skirt 46 is greater than the annular arc of the hook body 45, and the end of the hook skirt 46 away from the extension 47 is located on the outer side of the hook body 45 projected vertically. Figure 5 As shown, there is a fork between the end of the hook skirt 46 away from the hook body 45 and the outer peripheral surface of the hook body 45. When the operator swings the thread 2 along the outer peripheral surface of the hook body 45, the thread 2 can easily enter the fork and then easily enter the thread opening 44. In this way, the thread 2 can be wound onto the needle bar hook 4, which is convenient and quick.

[0031] To achieve the above or other objectives, this utility model also discloses a thread-piercing mechanism for use in a sewing machine. The thread-piercing mechanism includes a lower sleeve thread hook 3, a needle bar 6, and a needle 5. The lower sleeve thread hook 3 is disposed on the sewing machine head 1, the needle bar 6 is vertically and flexibly disposed in the sewing machine head 1, and the needle 5 is disposed at the bottom end of the needle bar 6. The needle 5 has a thread-passing hole 501. The needle bar 6 has a needle bar connecting hole. The needle bar 6 is provided with the aforementioned sewing machine needle bar thread hook. The thread hook body 45 has a radially provided mounting hole 41. The needle bar connecting hole is aligned with the mounting hole 41, and a fastener passes through both. The mounting hole 41 is disposed on the left, right, or rear side of the needle bar 6 through the needle bar connecting hole. The top thread passes through the lower sleeve thread hook 3, passes through the thread-passing opening 44, winds around the needle bar thread hook 4, and then passes into the thread-passing hole 501 of the needle 5.

[0032] In this embodiment, the needle bar connecting hole is a threaded hole, and the fastener is a screw or bolt. In other embodiments, the needle bar connecting hole may also be a through hole, and the fastener may be a locating pin or other parts, as long as it can fix the needle bar hook 4 to the needle bar 6.

[0033] Preferred, such as Figure 2 , Figure 3 As shown, the plane connecting the thread-passing part of the lower bushing hook 3 and the thread-passing hole 501 of the needle 5 is located between the two ends of the hook skirt 46. In this embodiment, the plane connecting the thread-passing part of the lower bushing hook 3 and the thread-passing hole 501 of the needle 5 is the running trajectory of the top thread 2 in the thread passage opening 44. Setting the running trajectory of the top thread 2 in the thread passage opening 44 between the two ends of the hook skirt 46 ensures that the top thread 2 can pass smoothly through the needle bar hook 4 during sewing. This prevents the top thread 2 from swinging to the end of the hook skirt 46 near the hook body 45 during sewing, causing the thread to get stuck, and also prevents the top thread 2 from swinging to the end of the hook skirt 46 away from the hook body 45 during sewing, causing it to detach from the thread passage opening 44.

[0034] To achieve the above or other objectives, this utility model also discloses a sewing machine, including the sewing machine needle bar and thread hook described above.

[0035] The sewing machine needle bar hook, inserting mechanism, and sewing machine involved in this utility model work on the following principle: The operator installs the needle bar hook 4 onto the needle bar 6 through the needle bar connecting hole, the mounting hole 41, and the fasteners inserted in both. Then, the top thread 2 is passed out from the lower bushing hook 3 of the sewing machine, passes through the fork at the end of the hook skirt 46 away from the hook body 45, and is directly inserted into the thread passage opening 44, so that the top thread 2 is in the outer thread portion 42 and the inner thread portion 43. After the top thread 2 passes out from the inner thread portion 43, it is inserted into the thread passage hole 501 of the needle 5.

[0036] The present invention relates to a sewing machine needle bar hook, a material-piercing mechanism, and a sewing machine. An outer thread portion 42 is provided on the outer wall of the hook body 45, and an inner thread portion 43 is provided on the inner wall of the hook skirt 46. The top thread 2 passes through the inner thread portion 43 and the outer thread portion 42, which improves the stability of the top thread 2 during the sewing process, effectively prevents the top thread 2 from swinging and detaching from the thread opening 44 during the lifting and lowering of the needle bar 6, and reduces the stress between the top thread 2 and the needle bar hook 4.

[0037] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A sewing machine needle bar thread hook, used in a sewing machine; characterized in that: The device includes a hook body (45) and a hook skirt (46). The hook skirt (46) is disposed on the hook body (45). There is a gap between the hook skirt (46) and the hook body (45) as a thread passage opening (44). An outer thread-containing part (42) is provided on the outer wall of the hook body (45) above the thread passage opening (44). An inner thread-containing part (43) is provided on the inner wall of the hook skirt (46) below the thread passage opening (44). The face thread (2) passes through the thread passage opening (44) and is wound into the needle bar hook (4). The face thread (2) is located in the outer thread-containing part (42) and the inner thread-containing part (43).

2. The sewing machine needle bar hook according to claim 1, characterized in that: The outer containment line portion (42) and the inner containment line portion (43) are in the same vertical plane.

3. The sewing machine needle bar hook according to claim 1, characterized in that: The outer containment line (42) is a fan-shaped notch. The lower end of the outer containment line (42) has a greater arc than the upper end. The outer containment line (42) has a certain slope from top to bottom. The surface line (2) is close to the surface of the outer containment line (42).

4. The sewing machine needle bar hook according to claim 3, characterized in that: The hook body (45) is ring-shaped, and an extension part (47) is provided at the bottom end of the hook body (45). One end of the hook skirt (46) is fixed on the extension part (47), and the hook skirt (46) extends in an arc shape. The gap between the lower end face of the hook body (45) and the upper end face of the hook skirt (46) is a line-passing opening (44).

5. The sewing machine needle bar hook according to claim 1, characterized in that: The extension arc of the hook skirt (46) is greater than the annular arc of the hook body (45), and the end of the hook skirt (46) away from the extension (47) is located on the outside of the hook body (45) projected in the vertical direction.

6. A needle-piercing mechanism for use in a sewing machine; the needle-piercing mechanism includes a lower liner hook (3), a needle bar (6), and a needle (5), wherein the lower liner hook (3) is disposed on the sewing machine head (1), the needle bar (6) is vertically and flexibly disposed in the sewing machine head (1), and the needle (5) is disposed at the bottom end of the needle bar (6); a thread-passing hole (501) is provided on the needle (5); and a needle bar connecting hole is provided on the needle bar (6); characterized in that: The needle bar (6) is provided with a sewing machine needle bar hook as described in any one of claims 1-5. The hook body (45) is provided with a mounting hole (41). The needle bar connecting hole is aligned with the mounting hole (41) and a fastener is passed through both. The mounting hole (41) is provided on the left, right, or rear side of the needle bar (6) through the needle bar connecting hole. The top thread passes through the lower bushing thread hook (3), goes through the thread opening (44) and wraps around the needle bar thread hook (4), and then passes through the thread hole (501) of the needle (5).

7. The feeding mechanism according to claim 6, characterized in that: The needle rod connection hole is a threaded hole, and the fastener is a screw or bolt.

8. The feeding mechanism according to claim 6, characterized in that: The plane where the thread-passing part of the lower bushing hook (3) and the thread-passing hole (501) of the needle (5) are located is between the two ends of the hook skirt (46).

9. A sewing machine, characterized in that: Includes the sewing machine needle bar and thread hook as described in any one of claims 1-5.

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