Hook basket and rotary hook

Abstract

A hook basket (100), comprising: a bottom plate (110); a side plate (120), the side plate being connected to the bottom plate, and the side plate being provided with a needle passing hole (121); a bobbin shaft (130), the bobbin shaft being arranged at the center of the bottom plate, the needle passing hole facing the bobbin shaft, and the bobbin shaft being used for mounting a bobbin; and a bobbin locating member (140), the bobbin locating member being provided on the inner side of the side plate, the side of the bobbin locating member distant from the bottom plate being flush with the side of the needle passing hole close to the bottom plate, or the bobbin locating member at least partially protruding from the side of the needle passing hole close to the bottom plate. The needle passing hole has an outer opening, the side of the outer opening close to the bottom plate has a first guide surface (122), and the first guide surface extends from the outer side of the needle passing hole to the bobbin locating member. Further, a rotary hook (200) is provided. The bobbin basket solves the problem that the distances of sewing needles inserted into thread passing holes are limited and excessive insertion may cause wobbling, making formation of large thread loops difficult.

Description

A shuttle frame and rotary shuttle Cross-references to related applications

[0001] This application claims priority to Chinese Patent Application No. 202410793426.0, filed in China on June 19, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of rotary shuttle technology, and more specifically, to a shuttle frame and a rotary shuttle. Background Technology

[0003] The rotary hook is an important component of a sewing machine. Among sewing equipment, lockstitch sewing machines are the most common. Most of these sewing machines use a rotary hook, whose tip hooks the loop, expands the loop, and guides the loop around the bobbin to form a lockstitch.

[0004] In the prior art, the sewing needle is limited by the needle hole. The contact area between the needle hole and the sewing needle is limited, and correspondingly, the sewing needle also has a lower limit position. If it continues to move downward, it is difficult for the sewing needle to be effectively limited, and the end of the sewing needle is prone to wobbling. Therefore, it is difficult to continue to move the sewing needle downward, and it is not convenient to further expand the loop to wrap around the bobbin. Summary of the Invention

[0005] The problem solved by this invention is that the sewing needle has a limited distance to enter the thread hole, and if it extends too far in, it is easy to wobble and it is difficult to form a larger thread loop.

[0006] To solve the above problems, the present invention provides a shuttle frame, the shuttle frame comprising: a base plate; a side plate connected to the base plate, the side plate having a needle hole; a bobbin shaft disposed at the center of the base plate, the needle hole facing the bobbin shaft, the bobbin shaft being used to mount a bobbin; a bobbin positioning member disposed on the inner side of the side plate; the side of the bobbin positioning member away from the base plate is flush with the side of the needle hole near the base plate, or the bobbin positioning member at least partially protrudes from the side of the needle hole near the base plate; wherein, the needle hole has an outer opening, the side of the outer opening near the base plate having a first guide surface, the first guide surface extending from the outer side of the needle hole toward the bobbin positioning member.

[0007] The technical effects achieved by adopting this solution are as follows: The bobbin positioning component is used for positioning and installing the bobbin, facilitating the fit between the bobbin and the bobbin shaft. It also enhances the strength of the side plate where the needle hole is located, preventing deformation of the needle hole. The top of the bobbin positioning component extends to the needle hole, and can also support the sewing needle, thus providing a larger supported area, more stable support, and reducing the risk of breakage. Furthermore, the bobbin positioning component limits the sewing needle's position, allowing it to reach a lower lower limit position and reducing the likelihood of wobbling or shifting. At this lower limit position, the needle can form a larger loop to better encircle the bobbin. The first guide surface at the outer opening guides the sewing needle into the needle hole. When the bobbin positioning component supports the needle hole, the axial length of the first guide surface within the needle hole can be longer, resulting in a smoother guide for the needle and further preventing needle damage.

[0008] Furthermore, the first guide surface extends to both ends of the outer opening; wherein 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 middle to both ends of the first guide surface.

[0009] The technical effect achieved by adopting this technical solution is as follows: the first guide surface is relatively shallow at both ends near the outer opening, and relatively deep in the middle of the first guide surface, that is, the first guide surface has a concave structure. While guiding the sewing needle in a direction parallel to the needle hole, the first guide surface can also guide the sewing needle to the middle of the needle hole, so that the needle hole and the bobbin are aligned.

[0010] Furthermore, the first guide surface extends at least partially to the side of the bobbin positioning member away from the base plate at one end near the inner wall of the bobbin positioning member.

[0011] The technical effects achieved by adopting this technical solution are as follows: In the prior art, when the sewing needle is supported and guided only through the needle hole on the side wall, a support plane needs to be reserved, so the guide surface is small. However, in this solution, the first guide surface can cover the part of the inner wall of the needle hole corresponding to the thickness of the side wall, and can also extend to the top of the bobbin positioning member. At this time, there is still a distance above the bobbin positioning member to support and limit the sewing needle. Therefore, the guiding effect of the first guide surface on the sewing needle is smoother. Specifically, when the vertical distance of the first guide surface near the outer side of the shuttle frame is fixed, the distance of the first guide surface to the inner side of the shuttle frame is larger, so the guiding effect is smoother and the sewing needle is less likely to be damaged.

[0012] Furthermore, the side of the pinhole away from the base plate has a second guide surface and an axial surface, the second guide surface being located on the side of the axial surface near the outer opening, and the axial surface being parallel to the direction of the pinhole.

[0013] The technical effect achieved by adopting this technical solution is as follows: The second guide surface is used to guide the sewing needle on the opposite side of the first guide surface. After being guided by the second guide surface, the sewing needle slides into the needle hole and is limited by the axial surface, so that it moves towards the bobbin shaft in a direction parallel to the needle hole.

[0014] Furthermore, the outer opening has side guide surfaces at both ends, and the side guide surfaces extend away from the inner wall of the pinhole; wherein the two side guide surfaces at both ends of the outer opening form an angle greater than 0 degrees.

[0015] The technical effect achieved by adopting this technical solution is as follows: The side guide surface is used to guide the sewing needle on the left and right sides of the outer opening of the needle hole. When the sewing needle approaches the upper part of the side guide surface, it can slide into the second guide surface through the side guide surface and then move towards the middle position of the needle hole. When the sewing needle approaches the lower part of the side guide surface, it can slide into the first guide surface through the side guide surface and then move towards the middle position of the needle hole.

[0016] Furthermore, the bobbin positioning component includes a fixing body and at least two opposing limiting members, the limiting members being located on the side of the fixing body away from the base plate, and the limiting members protruding from the needle hole.

[0017] The technical effect achieved by adopting this technical solution is that after being guided by the first guide surface, the sewing needle moves towards the center along the top surface of the bobbin positioning piece and can be locked between the two limiting pieces, thereby avoiding positional deviation.

[0018] Furthermore, the bobbin positioning member also includes an elastic part and a mounting groove. The mounting groove is formed in the fixing member body, and the elastic part is disposed in the mounting groove. The elastic part abuts against the fixing member body and the limiting member.

[0019] The technical effect achieved by adopting this technical solution is as follows: During the process of the sewing needle sliding on the top surface of the bobbin positioning component, it can squeeze the limiting component, compress the elastic part, and the limiting component partially retracts into the mounting groove, making it easier for the sewing needle to slide between the two limiting components. At this time, the limiting component rebounds, and the limiting component can have a larger area for limiting the sewing needle, thereby improving the limiting effect.

[0020] Furthermore, a third guide surface is provided on the side of the two limiting members that are opposite to each other, and a limiting surface is provided on the side of the two limiting members that are facing each other.

[0021] The technical effects achieved by adopting this technical solution are as follows: The third guide surface is used to guide the sewing needle to slide from the side of the limiting members that are opposite to each other to the limiting members, and it is also convenient to squeeze the limiting members during the sliding process so that the limiting members retract into the mounting groove; the limiting surface is used to prevent the sewing needle from sliding out between the two limiting members.

[0022] Furthermore, a fourth guide surface is provided on the side of the limiting member away from the bobbin shaft, and the fourth guide surface is used to guide the sewing needle between the two limiting surfaces.

[0023] The technical effect achieved by adopting this technical solution is as follows: when the sewing needle is inserted into the needle hole from the outside towards the limiting member, the sewing needle can be guided to the opposite side of the limiting member by the fourth guide surface, thereby achieving the centering of the sewing needle.

[0024] The present invention provides a rotary shuttle, the rotary shuttle comprising: a shuttle bed, a shuttle core, and a shuttle frame provided by any of the above technical solutions; the shuttle core is mounted on the shuttle core shaft, and the shuttle frame is mounted inside the shuttle bed.

[0025] The technical effect achieved by adopting this technical solution is that the rotary hook can limit and guide the sewing needle that has entered the needle hole through the bobbin positioning component, so that the sewing needle can achieve a lower lower limit position without deviation or shaking, so as to form a larger thread loop around the bobbin.

[0026] In summary, the various technical solutions described above in this application can have one or more of the following advantages or beneficial effects: i) The bobbin positioning component is used for positioning and installing the bobbin, facilitating the fit between the bobbin and the bobbin shaft. The bobbin positioning component also enhances the strength of the side plate where the needle hole is located, preventing deformation of the needle hole; ii) The top of the bobbin positioning component extends to the needle hole, and can also be used to support the sewing needle. Therefore, the sewing needle has a larger supported area, resulting in more stable support and less likelihood of breakage; iii) The bobbin positioning component limits the sewing needle, allowing it to reach a lower lower limit position and reducing wobbling. iv) The first guide surface at the outer opening position can guide the sewing needle into the needle hole. When the needle hole is supported by the needle hole positioning component, the axial length of the first guide surface in the needle hole can be longer, that is, the process of guiding the sewing needle through the first guide surface can be smoother, further avoiding damage to the sewing needle; v) After being guided by the first guide surface, the sewing needle moves towards the center along the top surface of the needle hole positioning component, and can be locked between the two limiting components, thereby avoiding positional deviation and achieving centering. Attached Figure Description

[0027] Figure 1 is a schematic diagram of a shuttle frame provided by the present invention;

[0028] Figure 2 is a structural schematic diagram of the shuttle frame in Figure 1 from another perspective;

[0029] Figure 3 is a magnified view of region I in Figure 2;

[0030] Figure 4 is a structural schematic diagram of the shuttle frame in Figure 1 from another perspective;

[0031] Figure 5 is a partial cross-sectional view of the bobbin positioning component in Figure 1;

[0032] Figure 6 is a top view of the shuttle frame in Figure 1;

[0033] Figure 7 is a cross-sectional view along the AA direction in Figure 6;

[0034] Figure 8 is a magnified view of region II in Figure 7;

[0035] Figure 9 is a schematic diagram of a rotary shuttle provided by the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100-Shuttle frame; 110-Base plate; 120-Side plate; 121-Pin hole; 122-First guide surface; 123-Second guide surface; 124-Axial surface; 125-Side guide surface; 130-Hoop core shaft; 140-Hoop core positioning component; 150-Limiting component; 151-Elastic part; 152-Mounting groove; 153-Third guide surface; 154-Fourth guide surface; 200-Rotary shuttle; 210-Shuttle bed. Detailed Implementation

[0038] The purpose of this invention is to provide a shuttle frame and rotary hook for better limiting and supporting the sewing needle, making it easier to lower the lower limit position, thereby facilitating the guide loop to wrap around the bobbin to form a lockstitch.

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Referring to Figures 1-8, the present invention provides a shuttle frame 100, which includes: a base plate 110; a side plate 120 connected to the base plate 110, the side plate 120 having a needle hole 121; a bobbin shaft 130 located at the center of the base plate 110, with the needle hole 121 facing the bobbin shaft 130, the bobbin shaft 130 being used to mount a bobbin; and a bobbin positioning member 140 located inside the side plate 120. The side of the bobbin positioning member 140 away from the base plate 110 is flush with the side of the needle hole 121 near the base plate 110, or the bobbin positioning member 140 at least partially protrudes from the side of the needle hole 121 near the base plate 110; wherein the needle hole 121 has an outer opening, and the side of the outer opening near the base plate 110 has a first guide surface 122, which extends from the outer side of the needle hole 121 toward the bobbin positioning member 140.

[0041] In this embodiment, the bobbin positioning member 140 is used for positioning and installing the bobbin, facilitating the engagement of the bobbin with the bobbin shaft 130. The bobbin positioning member 140 also enhances the strength of the side plate 120 where the needle hole 121 is located, preventing deformation of the needle hole 121. The top of the bobbin positioning member 140 extends to the needle hole 121, and can also support the sewing needle, thus providing a larger supported area for the needle, resulting in more stable support and reducing the risk of breakage. Furthermore, the bobbin positioning member 140 limits the movement of the sewing needle, allowing it to... With a lower lower limit position, it is not easy to shake or deviate. Lifting the sewing needle at a lower lower limit position can form a larger thread loop so that the shuttle 100 can hook the thread. The first guide surface 122 at the outer opening position can guide the sewing needle into the needle hole 121. When the bobbin positioning member 140 supports the needle hole 121, the axial length of the first guide surface 122 in the needle hole 121 can be longer. That is, the process of guiding the sewing needle through the first guide surface 122 can be smoother, further avoiding damage to the sewing needle.

[0042] Preferably, the width of the bobbin positioning member 140 is at least 1 / 2 of the width of the needle hole 121, and the longitudinal center line of the bobbin positioning member 140 corresponds to the longitudinal center line of the needle hole 121.

[0043] In one specific embodiment, the first guide surface 122 extends outward to both ends of the opening; wherein 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 middle to both ends of the first guide surface 122.

[0044] It should be noted that the first guide surface 122 is relatively shallow near the two ends of the outer opening, and relatively deep in the middle. That is, the first guide surface 122 has a concave structure. While guiding the sewing needle in a direction parallel to the needle hole 121, the first guide surface 122 can also guide the sewing needle to the middle position of the needle hole 121, so that the needle hole 121 is aligned with the bobbin shaft 130.

[0045] For example, the first guide surface 122 may be a plane with multiple slopes or a curved surface, which is not limited here.

[0046] In one specific embodiment, the first guide surface 122 extends at least partially to the side of the bobbin positioning member 140 away from the base plate 110, near one end of the inner wall of the bobbin positioning member 140.

[0047] It should be noted that in the prior art, when the sewing needle is supported and guided only by the needle hole 121 on the side wall, a supporting plane needs to be reserved, so the guiding surface is small. However, in this solution, the first guiding surface 122 can cover the part of the inner wall of the needle hole 121 corresponding to the thickness of the side wall, and can also extend above the bobbin positioning member 140. At this time, there is still a distance above the bobbin positioning member 140 to support and limit the sewing needle. Therefore, the guiding effect of the first guiding surface 122 on the sewing needle is smoother. Specifically, when the vertical distance of the first guiding surface 122 from the outside of the shuttle frame 100 is certain, the distance of the first guiding surface 122 from the inside of the shuttle frame 100 is greater, so the guiding effect is smoother and the sewing needle is less likely to be damaged.

[0048] In one specific embodiment, the side of the pinhole 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 of the axial surface 124 near the outer opening, and the axial surface 124 is parallel to the direction of the pinhole 121.

[0049] It should be noted that the second guide surface 123 is used to guide the sewing needle on the opposite side of the first guide surface 122. After being guided by the second guide surface 123, the sewing needle slides into the needle hole 121 and is limited by the axial surface 124, so that it moves toward the bobbin shaft 130 in a direction parallel to the needle hole 121.

[0050] In one specific embodiment, the two ends of the outer opening are provided with side guide surfaces 125, which extend away from the inner wall of the pinhole 121; wherein, the two side guide surfaces 125 at both ends of the outer opening form an angle greater than 0 degrees.

[0051] It should be noted that the side guide surface 125 is used to guide the sewing needle on the left and right sides of the outer opening of the needle 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 through the side guide surface 125 and then move towards the middle position of the needle 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 through the side guide surface 125 and then move towards the middle position of the needle hole 121.

[0052] In one specific embodiment, the bobbin positioning member 140 includes a fixing member body and at least two opposing limiting members 150. The limiting members 150 are located on the side of the fixing member body away from the base plate 110 and protrude from the pin hole 121.

[0053] It should be noted that after being guided by the first guide surface 122, the sewing needle moves towards the center along the top surface of the bobbin positioning member 140 and can be engaged between the two limiting members 150, thereby preventing positional deviation.

[0054] In one specific embodiment, the bobbin positioning member 140 further includes an elastic part 151 and a mounting groove 152. The mounting groove 152 is formed in the fixing member body, and the elastic part 151 is disposed in the mounting groove 152. The elastic part 151 abuts against the fixing member body and the limiting member 150.

[0055] It should be noted that during the process of the sewing needle sliding on the top surface of the bobbin positioning member 140, it can squeeze the limiting member 150, causing the elastic part 151 to compress. The limiting member 150 partially retracts into the mounting groove 152, making it easier for the sewing needle to slide between the two limiting members 150. At this time, the limiting member 150 rebounds, and the limiting member 150 can have a larger area for limiting the sewing needle, thereby improving the limiting effect.

[0056] When the elastic part 151 and the mounting groove 152 are directly provided on the inner wall of the needle hole 121, it is difficult to implement due to the thin side wall and the strength of the side wall is reduced. However, after the bobbin positioning member 140 extends to the needle hole 121, the side wall at that place is thickened, which makes it easier to open the elastic part 151 and the mounting groove 152, and the side wall can still have sufficient strength.

[0057] Preferably, the elastic part 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 is fixedly connected to the limiting member 150, thereby preventing the limiting member 150 from disengaging from the positioning member body.

[0058] In one specific embodiment, a third guide surface 153 is provided on the side of the two limiting members 150 that are opposite to each other, and a limiting surface is provided on the side of the two limiting members 150 that are facing each other.

[0059] It should be noted that the third guide surface 153 is used to guide the sewing needle to slide from the opposite side of the limiting member 150 to between the limiting members 150, and also facilitates the squeezing of the limiting member 150 during the sliding process to make the limiting member 150 retract into the mounting groove 152; the limiting surface is used to prevent the sewing needle from sliding out between the two limiting members 150.

[0060] In one specific embodiment, the limiting member 150 has a fourth guide surface 154 on the side away from the bobbin 130, the fourth guide surface 154 being used to guide the sewing needle between the two limiting surfaces.

[0061] It should be noted that when the sewing needle is inserted into the needle hole 121 from the outside towards the limiting member 150, the sewing needle can be guided to the opposite side of the limiting member 150 by the fourth guide surface 154, thereby achieving the centering of the sewing needle.

[0062] For example, the mounting groove 152 is directly below the limiting member 150. When the third guide surface 153 or the fourth guide surface 154 of the limiting member 150, or when the limiting member 150 is compressed (i.e., when the outer side, left and right sides, or top of the limiting member 150 are compressed), the limiting member 150 can slide vertically into the mounting groove 152, allowing the sewing needle to enter between the two limiting members 150 for positioning. Of course, the mounting groove 152 can also be oblique; this is not limited here.

[0063] Referring to Figure 9, the present invention provides a rotary shuttle 200, which includes: a shuttle bed 210, a shuttle core, and a shuttle frame 100 provided by any of the above technical solutions; the shuttle core is installed on the shuttle core shaft 130, and the shuttle frame 100 is installed inside the shuttle bed 210.

[0064] It should be noted that the rotary hook 200 can limit and guide the sewing needle that has entered the needle hole 121 through the bobbin positioning member 140, so that the sewing needle can achieve a lower lower limit position without deviation or shaking, so as to form a larger loop for hooking the thread.

[0065] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A shuttle holder, characterized in that, The shuttle holder comprises: a bottom plate; a side plate connected to the bottom plate, the side plate being provided with a needle passing hole; a bobbin shaft arranged at the center of the bottom plate, the needle passing hole facing the bobbin shaft, and the bobbin shaft being used for mounting a bobbin; a bobbin positioning member arranged at the inner side of the side plate, the side of the bobbin positioning member away from the bottom plate being flush with the side of the needle passing hole close to the bottom plate, or the bobbin positioning member at least partially protruding from the side of the needle passing hole close to the bottom plate; wherein the needle passing hole has an outer opening, the side of the outer opening close to the bottom plate is provided with a first guide surface, and the first guide surface extends from the outer side of the needle passing hole to the bobbin positioning member.

2. The shuttle holder according to claim 1, characterized in that The first guide surface extends to 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 bottom plate gradually decreases from the middle of the first guide surface to both ends.

3. The shuttle holder according to claim 1, characterized in that The side of the first guide surface close to the inner wall of the bobbin positioning member at least partially extends to the side of the bobbin positioning member away from the bottom plate.

4. The shuttle holder according to claim 1, characterized in that The side of the needle passing hole away from the bottom plate is provided with a second guide surface and an axial surface, 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 passing hole.

5. The shuttle holder according to claim 1, characterized in that Both ends of the outer opening are provided with side guide surfaces extending away from the inner wall of the needle passing hole, and the two side guide surfaces at both ends of the outer opening form an included angle greater than 0 degrees.

6. The shuttle holder according to claim 1, characterized in that The bobbin positioning member comprises a fixing member body and at least two oppositely arranged limiting members, the limiting members are arranged on the side of the fixing member body away from the bottom plate, and the limiting members protrude from the needle passing hole.

7. The shuttle holder according to claim 6, characterized in that The bobbin positioning member further comprises a resilient portion and a mounting groove, the mounting groove is arranged on the fixing member body, the resilient portion is arranged in the mounting groove, and the resilient portion abuts against the fixing member body and the limiting members.

8. The shuttle holder according to claim 6, characterized in that The side of each limiting member away from the other limiting member is provided with a third guide surface, and the side of each limiting member facing the other limiting member is provided with a limiting surface.

9. The shuttle holder according to claim 8, characterized in that The side of each limiting member away from the bobbin shaft is provided with a fourth guide surface, and the fourth guide surface is used for guiding a sewing needle between the two limiting surfaces.

10. A rotary hook characterized in that, The rotating shuttle comprises a shuttle bed, a bobbin, and the shuttle holder according to any one of claims 1-9; The bobbin is mounted on the bobbin shaft, and the shuttle holder is mounted in the shuttle bed.

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