Shuttle frame and rotary shuttle

Abstract

To provide a shuttle frame and a rotary shuttle for forming a larger yarn loop.SOLUTION: A side plate 120 provided with a needle through hole 121, a bobbin shaft 130 provided at a center of the base plate 110 and facing the needle through hole 121 for mounting a bobbin, and a bobbin positioning member 140 provided on an inner side of the side plate 120, a side of the bobbin positioning member away from the base plate 110 being flush with a side of the needle through hole 121 close to the base plate 110, or at least a part of the bobbin positioning member protruding from the side of the needle through hole close to the base plate 110, wherein the needle through hole 121 has an outer opening, and a side of the outer opening close to the base plate 110 has a first guiding surface; The first guiding surface extends from the outside of the needle through hole 121 to the bobbin positioning member 140.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the field of rotary shuttle technology, and in particular to a shuttle frame and a rotary shuttle. [Background technology]

[0002] The rotary shuttle is an important component of a sewing machine, and lockstitch sewing machines are the most common in sewing equipment. Many of these machines employ a rotary shuttle that hooks a thread loop at its tip, spreads the thread loop, and guides the thread loop around the bobbin to form a lockstitch.

[0003] In the prior art, the position of the sewing needle is restricted by the needle hole, and the contact area between the needle hole and the sewing needle is limited. Accordingly, the sewing needle also has a lower limit position. If the needle is lowered further, it is no longer subject to effective position restriction, and the end of the sewing needle is prone to shaking, making it difficult to continue moving the sewing needle downwards, further expanding the thread loop and making it inconvenient to surround the bobbin. Summary of the Invention

[0004] The present invention solves the problem that the distance that a sewing needle can enter a thread hole is limited, and if it enters too far, it tends to swing and it becomes difficult to form a larger thread loop.

[0005] In order to solve the above problems, the present invention provides a shuttle frame, which includes: a base plate; a side plate connected to the base plate and provided with a needle hole; a bobbin shaft provided at the center of the base plate, the needle hole facing the bobbin shaft and used for attaching a bobbin; and a bobbin positioning member provided inside the side plate, the side remote from the base plate being flush with the side of the needle hole close to the base plate or at least a portion of the bobbin positioning member protruding from the side of the needle hole close to the base plate, wherein the needle hole has an outer opening and the side of the outer opening close to the base plate has a first guide surface, which extends from outside the needle hole to the bobbin positioning member.

[0006] After adopting this technical solution, the technical effects achieved are: the bobbin positioning member is used to position and attach the bobbin, making it easier to fit the bobbin to the bobbin shaft; the bobbin positioning member is also used to improve the strength of the side plate where the needle hole is located and prevent deformation of the needle hole; after the top of the bobbin positioning member extends to the needle hole, the top of the bobbin positioning member can also be used to support the sewing needle, which increases the area where the sewing needle receives support, making the support more stable and less likely to break; and the bobbin positioning member regulates the position of the sewing needle. In this way, the sewing needle can have a lower limit position and is less likely to shake or shift. At the lower limit position, the sewing needle can form a larger thread loop, which makes it easier to encircle the bobbin. The first guide surface located at the outer opening can guide the sewing needle into the needle hole. If a bobbin positioning member is present to support the needle hole, the axial length of the first guide surface within the needle hole can be made longer, i.e., the process of the sewing needle being guided by the first guide surface can be made smoother, and damage to the sewing needle can be avoided.

[0007] Furthermore, the first guide surface extends toward both ends of the outer opening, and the distance from the first guide surface to the inner wall of the bobbin positioning member and / or the distance from the first guide surface to the base plate gradually decreases from the center of the first guide surface toward both ends.

[0008] The technical effect achieved by adopting this technical solution is that the positions of the first guide surface close to both ends of the outer opening are relatively shallow, and the central position of the first guide surface is relatively deep, i.e., the first guide surface has an inward concave structure, and the first guide surface can guide the sewing needle in a direction parallel to the needle hole and also guide it towards the central position of the needle hole, which facilitates alignment of the needle hole with the bobbin shaft.

[0009] Furthermore, one end of the first guide surface that is close to the inner wall of the bobbin positioning member at least partially extends to the side of the bobbin positioning member that is away from the base plate.

[0010] Technical effects achieved by adopting this technical solution: In the prior art, when the sewing needle is supported and guided only through the needle hole on the side wall, a flat surface must be secured for support, resulting in a relatively small guide surface. However, the first guide surface in this technical solution can cover the part of the inner wall of the needle hole that corresponds to the thickness of the side wall, and can even extend up to above the bobbin positioning member. In this case, a certain distance is still secured above the bobbin positioning member for supporting and regulating the position of the sewing needle, so the first guide surface's guiding action on the sewing needle is gentler. Specifically, when the vertical distance that the first guide surface approaches the outside of the shuttle frame is constant, the first guide surface extends a greater distance inward of the shuttle frame, resulting in a gentler guiding action and making the sewing needle less likely to be damaged.

[0011] Furthermore, the needle passage hole has a second guide surface and an axial surface on the side away from the base plate, the second guide surface being located on the side of the axial surface closer to the outer opening, and the axial surface being parallel to the direction of the needle passage hole.

[0012] After adopting this technical solution, the technical effect achieved is: the second guide surface is used on the side opposite to the first guide surface to realize a guiding action for the sewing needle, the sewing needle slides into the needle passage hole with the guidance of the second guide surface, and the position is regulated by the axial surface, so that the sewing needle moves toward the bobbin axis in a direction parallel to the needle passage hole.

[0013] Furthermore, side guide surfaces are provided at both lateral ends of the outer opening, and the side guide surfaces extend in a direction away from the inner wall of the needle passage hole, and the two side guide surfaces at both ends of the outer opening form an angle greater than 0 degrees.

[0014] After adopting this technical solution, the technical effect achieved is: the side guide surfaces are used to guide the sewing needle on both the left and right sides of the outer opening of the needle passage hole; when the sewing needle approaches the upper part of the side guide surfaces, it can be guided by the side guide surfaces to slide onto the second guide surface and then move towards the central position of the needle passage hole; when the sewing needle approaches the lower part of the side guide surfaces, it can be guided by the side guide surfaces to slide onto the first guide surface and then move towards the central position of the needle passage hole.

[0015] Furthermore, the bobbin positioning member includes a fixed member body and at least two opposing position regulating members, the position regulating members being provided on the side of the fixed member body away from the base plate, and the position regulating members protruding from the needle passage hole.

[0016] After adopting this technical solution, the technical effect achieved is: the sewing needle can be guided by the first guide surface to move toward the center along the top surface of the bobbin positioning member and fit between the two position control members, thereby avoiding position deviation.

[0017] Furthermore, the bobbin positioning member further includes an elastic portion and an attachment groove, the attachment groove being provided on the fixing member main body, the elastic portion being provided within the attachment groove, and the elastic portion abutting against the fixing member main body and the position regulating member.

[0018] After adopting this technical solution, the technical effect achieved is: during the process of the sewing needle sliding on the top surface of the bobbin positioning member, the position regulating member can be pushed in, compressing the elastic part, and part of the position regulating member contracting into the mounting groove, making it easier for the sewing needle to slide between the two position regulating members; in this case, the position regulating member rebounds, allowing the position regulating member to have a larger area for positioning the sewing needle, thereby improving the effect of position regulating.

[0019] Furthermore, a third guide surface is provided on the sides of the two position regulating members that are separated from each other, and a position regulating surface is provided on the sides of the two position regulating members that face each other.

[0020] After adopting this technical solution, the technical effect achieved is: the third guide surface is used to guide the sewing needle to slide from the mutually separated sides of the position regulating members toward between the position regulating members, and is also convenient for pushing the position regulating member during the sliding process so that the position regulating member is contracted into the mounting groove, and the position regulating surface is used to prevent the sewing needle from sliding out from between the two position regulating members.

[0021] Furthermore, a fourth guide surface is provided on the side of the position regulating member away from the bobbin shaft, and the fourth guide surface is used to guide the sewing needle between the two position regulating surfaces.

[0022] After adopting this technical solution, the technical effect achieved is: when the sewing needle is attached to the needle passage hole from the outside toward the position regulating member, the sewing needle is guided to the opposite side of the position regulating member by the fourth guide surface, thereby realizing centering of the sewing needle.

[0023] The present invention provides a rotary shuttle including a shuttle race, a bobbin, and a shuttle frame provided by any one of the above technical solutions, wherein the bobbin is attached to the bobbin shaft, and the shuttle frame is attached within the shuttle race.

[0024] The technical effect achieved by adopting this technical solution is that the rotary shuttle can position and guide the sewing needle when it enters the needle hole through the bobbin positioning member, so that the sewing needle can achieve a lower lower limit position without deviation or shaking, which is convenient for forming a larger thread loop to surround the bobbin.

[0025] In view of the above, the above technical solutions of the present application can have one or more of the following advantages or beneficial effects: i) the bobbin positioning member is used to position and attach the bobbin, making it easier to fit the bobbin to the bobbin shaft, and the bobbin positioning member is also used to improve the strength of the side plate where the needle hole is located and prevent deformation of the needle hole; ii) after the top of the bobbin positioning member extends to the needle hole, the top of the bobbin positioning member can also be used to support the sewing needle, which increases the area where the sewing needle is supported, making the support more stable and less likely to break; iii) the bobbin positioning member restricts the position of the sewing needle, allowing the sewing needle to have a lower limit position, preventing shaking and deviation. When the needle is raised to a lower limit position, it can form a larger thread loop and surround the bobbin; iv) the first guide surface located at the outer opening can guide the needle into the needle hole, and when a bobbin positioning member is present to support the needle hole, the axial length of the first guide surface within the needle hole can be made longer, i.e., the process of the sewing needle being guided by the first guide surface can be made smoother and damage to the sewing needle can be prevented; v) the first guide surface can guide the sewing needle along the top surface of the bobbin positioning member toward the center and fit between the two position restricting members, thereby preventing displacement and achieving centering. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a structural schematic diagram of a shuttle frame provided by the present invention; [Figure 2] FIG. 2 is a structural schematic diagram of the shuttle frame in FIG. 1 at another viewing angle. [Figure 3] FIG. 3 is a partial enlarged view of region I in FIG. 2. [Figure 4] FIG. 2 is a structural schematic diagram of the shuttle frame in FIG. 1 at another viewing angle. [Figure 5] FIG. 2 is a local cross-sectional view of the bobbin positioning member in FIG. [Figure 6] FIG. 2 is a top view of the shuttle frame in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along the line A-A in FIG. 6. [Figure 8] FIG. 8 is a partial enlarged view of region II in FIG. 7. [Figure 9] 1 is a structural schematic diagram of the rotary shuttle provided by the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0027] The present invention aims to provide a shuttle frame and rotary shuttle that can be used to better position and support a sewing machine needle, thereby making it easier to lower the lower limit position and to guide the thread loop around the bobbin to achieve the effect of a lock stitch.

[0028] In order to make the above objects, features and advantages of the present invention more clearly comprehensible, specific embodiments of the present invention will be described in detail below with reference to the drawings.

[0029] 1 to 8, the present invention provides a shuttle frame 100, which includes: a base plate 110; a side plate 120 connected to the base plate 110 and having a needle hole 121; a bobbin shaft 130 provided at the center of the base plate 110, with the needle hole 121 facing toward it, and used for attaching a bobbin; and a bobbin positioning member 140 provided inside the side plate 120, with the side away from the base plate 110 being flush with the side of the needle hole 121 that is close to the base plate 110, or at least a portion of the bobbin positioning member 140 protruding from the side of the needle hole 121 that is close to the base plate 110, wherein the needle hole 121 has an outer opening, and the side of the outer opening that is close to the base plate 110 has a first guide surface 122 that extends from outside the needle hole 121 to the bobbin positioning member 140.

[0030] In this embodiment, the bobbin positioning member 140 is used to position and attach the bobbin, making it easier to fit the bobbin to the bobbin shaft 130. The bobbin positioning member 140 also improves the strength of the side plate 120 where the needle hole 121 is located, and prevents deformation of the needle hole 121. After the top of the bobbin positioning member 140 extends to the needle hole 121, the top of the bobbin positioning member 140 can also be used to support the sewing needle. That is, the flat surface of the needle hole 121 that is closest to the base plate 110 extends and protrudes toward the bobbin shaft 130, which increases the area where the sewing needle is supported, making the support more stable and less likely to break. In addition, the bobbin positioning member 140 can also be used to support the sewing needle after it reaches the needle hole 121. The positioning member 140 regulates the position of the sewing needle, allowing the sewing needle to have a lower lower limit position, making it less likely to wobble or shift. At the lower lower limit position, raising the sewing needle allows a larger thread loop to be formed, making it easier for the shuttle frame 100 to catch the thread. The first guide surface 122 located at the outer opening can guide the sewing needle into the needle passage hole 121. When the bobbin positioning member 140 is present to support the needle passage hole 121, the axial length of the first guide surface 122 within the needle passage hole 121 can be made longer. This means that the process of the sewing needle being guided by the first guide surface 122 is smoother, and damage to the sewing needle can be further avoided.

[0031] Preferably, the angle between the plane of the needle passage hole 121 close to the base plate 110 and the first guide surface 122 is 120° to 180°.

[0032] Preferably, the width of the bobbin positioning member 140 is equal to or greater than half the width of the needle hole 121 , and the longitudinal centerline of the bobbin positioning member 140 corresponds to the longitudinal centerline of the needle hole 121 .

[0033] Wherein, the bobbin positioning member 140 can also be a positioning member for positioning the shuttle case, and is not limited thereto.

[0034] In a specific embodiment, the first guide surface 122 extends toward both ends of the outer opening, and the distance from the first guide surface 122 to the inner wall of the bobbin positioning member 140 and / or the distance from the first guide surface 122 to the base plate 110 gradually decreases from the center of the first guide surface 122 toward both ends.

[0035] It should be noted that the first guide surface 122 is relatively shallow near both ends of the outer opening, and relatively deep at the center, i.e., the first guide surface 122 has an inward concave structure, and the first guide surface 122 can guide the sewing needle in a direction parallel to the needle hole 121 and also guide it toward the center of the needle hole 121, which is convenient for aligning the needle hole 121 with the bobbin shaft 130.

[0036] For example, the first guide surface 122 may be a plane with a plurality of different inclinations or a curved surface, and is not limited thereto.

[0037] In a specific embodiment, one end of first guide surface 122 that is close to the inner wall of bobbin positioning member 140 extends at least partially to the side of bobbin positioning member 140 that is away from base plate 110 .

[0038] It should be noted that in the prior art, when the sewing needle is supported and guided only through the needle hole 121 on the side wall, a flat surface must be ensured for support, resulting in a relatively small guide surface. However, the first guide surface 122 in this technical solution can cover the portion of the inner wall of the needle hole 121 that corresponds to the thickness of the side wall, and can even extend up to above the bobbin positioning member 140. In this case, a certain distance can still be ensured above the bobbin positioning member 140 for supporting and regulating the position of the sewing needle, so the guiding action of the first guide surface 122 on the sewing needle is gentler. Specifically, when the vertical distance that the first guide surface 122 approaches the outside of the shuttle frame 100 is constant, the distance that the first guide surface 122 extends inward of the shuttle frame 100 is greater, resulting in a gentler guiding action and making the sewing needle less likely to be damaged.

[0039] In a specific embodiment, the side of the needle passage hole 121 away from the base plate 110 has a second guide surface 123 and an axial surface 124, the second guide surface 123 is located on the side closer to the outer opening of the axial surface 124, and the axial surface 124 is parallel to the direction of the needle passage hole 121.

[0040] It should be noted that the second guide surface 123 is inclined in a direction away from the outer opening, so that the axial surface 124 projects toward the needle passage hole 121. The second guide surface 123 is used to guide the sewing needle on the side opposite to the first guide surface 122, so that the sewing needle slides into the needle passage hole 121 with the guidance of the second guide surface 123, and the position is regulated by the axial surface 124, so that the needle moves toward the bobbin shaft 130 in a direction parallel to the needle passage hole 121. The angle between the second guide surface 123 and the axial surface 124 is 140° to 180°, for example, 150° or 170°.

[0041] In a specific embodiment, side guide surfaces 125 are provided at both lateral ends of the outer opening, and the side guide surfaces 125 extend in a direction away from the inner wall of the needle passage hole 121, and the two side guide surfaces 125 at both ends of the outer opening form an angle greater than 0 degrees.

[0042] It should be noted that the side guide surfaces 125 are used to guide the sewing needle on both the left and right sides of the outer opening of the needle passage hole 121; when the sewing needle approaches the upper part of the side guide surface 125, it can slide into the second guide surface 123 by the guide of the side guide surface 125 and then move toward the central position of the needle passage hole 121; when the sewing needle approaches the lower part of the side guide surface 125, it can slide into the first guide surface 122 by the guide of the side guide surface 125 and then move toward the central position of the needle passage hole 121.

[0043] In a specific embodiment, the bobbin positioning member 140 includes a fixed member body and at least two opposing position regulating members 150, which are provided on the side of the fixed member body away from the base plate 110, and the position regulating members 150 protrude from the needle passage hole 121.

[0044] It should be noted that the sewing needle can be guided by the first guide surface 122 to move toward the center along the top surface of the bobbin positioning member 140 and fit between the two position control members 150, thereby preventing displacement.

[0045] In a specific embodiment, the bobbin positioning member 140 further includes an elastic portion 151 and a mounting groove 152, the mounting groove 152 being provided on the fixing member body, the elastic portion 151 being provided in the mounting groove 152, and the elastic portion 151 abutting against the fixing member body and the position limiting member 150.

[0046] It should be noted that, as the sewing needle slides over the top surface of the bobbin positioning member 140, the position regulating member 150 can be pushed in, compressing the elastic portion 151 and causing a portion of the position regulating member 150 to contract into the mounting groove 152, making it easier for the sewing needle to slide between the two position regulating members 150. In this case, the position regulating member 150 rebounds, allowing the position regulating member 150 to have a larger area for position regulating the sewing needle, thereby improving the effect of position regulating.

[0047] If the elastic part 151 and the mounting groove 152 were directly installed on the inner wall of the needle hole 121, the side wall would be relatively thin, making installation difficult and reducing the strength of the side wall. However, after the bobbin positioning member 140 extends to the needle hole 121, the side wall at that position becomes thicker, making it easier to install the elastic part 151 and the mounting groove 152, and the side wall still has sufficient strength.

[0048] Preferably, the elastic portion 151 is, for example, at least one spring, one end of which is fixedly connected to the bottom of the mounting groove 152 and the other end of which is fixedly connected to the position regulating member 150, thereby preventing the position regulating member 150 from coming off the positioning member body.

[0049] In a specific embodiment, a third guide surface 153 is provided on the sides of the two position regulating members 150 that are separated from each other, and a position regulating surface is provided on the sides of the two position regulating members 150 that face each other.

[0050] It should be noted that the third guide surface 153 is used to guide the sewing needle to slide from the opposing sides of the position regulating members 150 toward the gap between the position regulating members 150, and is useful for pushing the position regulating member 150 during the sliding process, so that the position regulating member 150 is contracted into the mounting groove 152, and the position regulating surface is used to prevent the sewing needle from sliding out from between the two position regulating members 150.

[0051] In a specific embodiment, a fourth guide surface 154 is provided on the side of the position regulating member 150 away from the bobbin shaft 130, and the fourth guide surface 154 is used to guide the sewing needle between the two position regulating surfaces.

[0052] It should be noted that when the sewing needle is attached to the needle passage hole 121 from the outside toward the position regulating member 150, the sewing needle is guided to the opposite side of the position regulating member 150 by the fourth guide surface 154, thereby achieving centering of the sewing needle.

[0053] For example, if the mounting groove 152 is located directly below the position restricting member 150, and the third guide surface 153 or fourth guide surface 154 of the position restricting member 150 or the position restricting member 150 is pressed in, i.e., when the outer side, both left and right sides, or the top of the position restricting member 150 is pressed in, the position restricting member 150 will all slide vertically into the mounting groove 152, and the sewing needle will fit between the two position restricting members 150, thereby achieving positioning. Of course, the mounting groove 152 may also be inclined and is not limited thereto.

[0054] Referring to FIG. 9, the present invention provides a rotary shuttle 200 including a shuttle race 210, a bobbin, and a shuttle frame 100 provided by any one of the above technical solutions, wherein the bobbin is attached to a bobbin shaft 130, and the shuttle frame 100 is attached within the shuttle race 210.

[0055] It should be noted that the rotary shuttle 200 can position and guide the sewing needle entering the needle passage hole 121 by the bobbin positioning member 140, thereby allowing the sewing needle to achieve a lower lower limit position without deviation or shaking, thereby forming a larger thread loop and making it easier to catch the thread.

[0056] Although the present invention has been disclosed as above, the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore the scope of the claims of the present invention shall be limited to the scope of the claims. [Explanation of symbols]

[0057] 100 Shuttle Frame 110 base plate 120 Side Plate 121 Needle hole 122 First guide surface 123 Second guide surface 124 Axial Surface 125 Side guide surface 130 Bobbin shaft 140 Bobbin positioning member 150 Position control member 151 Elastic part 152 Mounting groove 153 Third guide surface 154 Fourth guide surface 200 Rotary Shuttle 210 Shuttle Race

Claims

1. A shuttle frame, A base plate and a side plate connected to the base plate and having a needle hole; a bobbin shaft provided at the center of the base plate, the needle hole facing the bobbin shaft, and used to attach a bobbin; a bobbin positioning member that is provided on the inner side of the side plate, and whose side away from the base plate is flush with the side of the needle passage hole that is close to the base plate, or whose at least a portion thereof protrudes from the side of the needle passage hole that is close to the base plate, The needle passage hole has an outer opening, and a first guide surface is provided on the side of the outer opening that is close to the base plate, and the first guide surface extends from the outside of the needle passage hole to the bobbin positioning member. Shuttle frame.

2. The first guide surface extends toward both ends of the outer opening, and a distance from the first guide surface to an inner wall of the bobbin positioning member and / or a distance from the first guide surface to the base plate gradually decreases from the center of the first guide surface toward both ends.

2. The shuttle frame of claim 1.

3. the first guide surface has an end adjacent to the inner wall of the bobbin positioning member, the end at least partially extending to a side of the bobbin positioning member that is spaced apart from the base plate.

2. The shuttle frame of claim 1.

4. The needle passage hole has a second guide surface and an axial surface on the side away from the base plate, the second guide surface is located on the side of the axial surface close to the outer opening, and the axial surface is parallel to the direction of the needle passage hole.

2. The shuttle frame of claim 1.

5. The outer opening is provided at both lateral ends with side guide surfaces, the side guide surfaces extending in a direction away from the inner wall of the needle passage hole, and the two side guide surfaces at both ends of the outer opening form an angle greater than 0 degrees.

2. The shuttle frame of claim 1.

6. The bobbin positioning member includes a fixed member body and at least two position regulating members provided opposite to each other, the position regulating members being provided on a side of the fixed member body away from the base plate, and the position regulating members protruding from the needle passage hole.

2. The shuttle frame of claim 1.

7. the bobbin positioning member further includes an elastic portion and an attachment groove, the attachment groove is provided in the fixing member body, the elastic portion is provided in the attachment groove, and the elastic portion abuts against the fixing member body and the position restricting member.

7. The shuttle frame of claim 6.

8. a third guide surface is provided on the two position regulating members on their mutually separated sides, and a position regulating surface is provided on the two position regulating members on their opposing sides, 7. The shuttle frame of claim 6.

9. a fourth guide surface is provided on the side of the position regulating member away from the bobbin shaft, and the fourth guide surface is used to guide the sewing machine needle between the two position regulating surfaces.

9. The shuttle frame of claim 8.

10. A rotary shuttle comprising a shuttle race, a bobbin and a shuttle frame according to any one of claims 1 to 9, The bobbin is attached to the bobbin shaft, and the shuttle frame is attached to the shuttle race. Rotary shuttle.

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