A shuttle case and shuttle core assembly

Abstract

The utility model relates to a kind of shuttle case, including shuttle case body, tablet and elastic tension piece;Shuttle case body includes bottom wall, the shaft portion of one end with bottom wall and the side wall of one end with bottom wall connection, side wall is located at the periphery of shaft portion, bottom wall, side wall and shaft portion form the shuttle core installation slot of one end opening, wire hole suitable for leading out bottom thread is provided on side wall;Tablet is installed in the outside of side wall, the end of tablet is provided with the wire port for guiding bottom thread;Elastic tension piece includes the tension part of float, and tension part is used to exert elastic tension on the bottom thread between wire hole and wire port.The utility model further proposes a kind of shuttle core assembly.The utility model can reduce the frequency of manual adjustment of shuttle core assembly bottom thread tension and improve the efficiency of manual adjustment of shuttle core assembly bottom thread tension, can effectively improve bottom thread stitch quality.

Description

Technical Field

[0001] This utility model relates to the field of sewing equipment technology, specifically to a bobbin case and bobbin assembly. Background Technology

[0002] The bobbin assembly is a key component in sewing equipment for forming stitches. Existing bobbin assemblies may have the following technical problems: To create more uniform and aesthetically pleasing stitches, the bobbin assembly needs to provide appropriate tension for the bobbin thread. Existing bobbin assemblies lack a bobbin thread elastic tension device, instead featuring adjustable pressure plates on the outside of the bobbin case. The force exerted by the pressure plates on the bobbin and the bobbin thread is adjusted manually, thereby regulating the bobbin thread tension. However, this tension lacks elasticity, making it difficult to achieve the desired stitch size. Furthermore, for different bobbin threads and fabrics, the bobbin thread tension needs to be adjusted multiple times based on experience, resulting in a limited adjustment method, high adjustment frequency, and cumbersome operation. To prevent the bobbin from spinning freely, existing bobbin assemblies typically incorporate spring plates inside the bobbin case. These spring plates apply pressure to the bobbin, increasing the friction between the bobbin and the bobbin case, thus preventing the bobbin from spinning freely due to inertia. However, the spring plates in the bobbin case may become fatigued, deformed, or worn, easily leading to their damage and ultimately causing the bobbin case to be scrapped. This results in a large number of parts and the bobbin case being prone to failure. Utility Model Content

[0003] The purpose of this invention is to provide a bobbin case and bobbin assembly to alleviate or eliminate at least one of the aforementioned technical problems.

[0004] The present invention provides a shuttle shell, comprising a shuttle shell body, a pressure plate, and an elastic tension member; The bobbin case body includes a bottom wall, a shaft connected to the bottom wall at one end, and a side wall connected to the bottom wall at one end. The side wall is located around the shaft. The bottom wall, the side wall, and the shaft form a bobbin mounting groove with one open end. The side wall is provided with a wire hole suitable for leading out the bottom thread. The pressure plate is installed on the outside of the side wall, and the end of the pressure plate is provided with a wire opening for guiding the bottom line; The elastic tension member includes a floating tension section for applying tension to the bottom line between the wire hole and the wire opening.

[0005] Optionally, the elastic tension element is a spring. Optionally, the elastic tension member is a torsion spring, and the tension part is disposed on the first torsion spring arm of the torsion spring.

[0006] Optionally, the first torsion spring arm includes a torsion spring arm body, a first spring arm segment that bends inward relative to the torsion spring arm body, and a second spring arm segment that bends outward relative to the first spring arm segment, wherein the tension portion is disposed on the second spring arm segment.

[0007] Optionally, the sidewall is provided with a first strip hole for avoiding the root of the second spring arm segment, and the pressure plate is provided with a second strip hole for avoiding the end of the second spring arm segment. The root of the second spring arm segment extends into the first strip hole, and the end of the second spring arm segment extends into the second strip hole. The tension part is located in the gap between the pressure plate and the sidewall.

[0008] Optionally, the sidewall is provided with an outwardly protruding protrusion, the torsion spring body of the torsion spring cooperates with the protrusion, and the second torsion spring arm of the torsion spring is connected to the sidewall or the pressure plate.

[0009] Optionally, the pressure plate is provided with a pressing part for radially pressing the bobbin mounted in the bobbin mounting groove.

[0010] Optionally, a tension adjustment structure is provided between the pressure plate and the side wall. The tension adjustment structure is used to adjust the tension between the pressure plate and the side wall, so as to adjust the contact pressure between the contact part and the bobbin installed in the bobbin mounting groove.

[0011] Optionally, the bobbin case body includes a magnetic attraction part, which is adapted to magnetically attract with a magnetic bobbin.

[0012] This utility model also proposes a bobbin assembly, including a bobbin case as described in any of the above claims and a magnetic bobbin, wherein the bobbin is installed in the bobbin mounting groove, and the bobbin case and the bobbin are magnetically attracted to each other.

[0013] This invention can reduce the frequency of manual adjustment of the bobbin thread tension and improve the efficiency of manual adjustment of the bobbin thread tension, thereby effectively improving the quality of the bobbin thread stitch. Attached Figure Description

[0014] Figure 1 This is one of the structural schematic diagrams of the shuttle shell described in some embodiments; Figure 2 This is an exploded view of the shuttle shell described in some embodiments; Figure 3 This is a schematic diagram of the structure of the spring sheet described in some embodiments; Figure 4 This is a schematic diagram of the torsion spring described in some embodiments; Figure 5 This is a second schematic diagram of the shuttle shell structure described in some embodiments; Figure 6 This is a schematic diagram of the working of the shuttle housing described in some embodiments; Figure 7 for Figure 6 A magnified view of a portion of the image.

[0015] In the diagram, 1—shuttle body, 2—pressure plate, 3—torsion spring, 4—first screw, 5—second screw, 6—fastening element, 7—bottom line. 101—Bottom wall, 102—Side wall, 103—Shaft, 104—Wire groove, 105—Wire hole, 106—Allowance hole, 107—Third strip hole, 108—Protrusion, 109—First strip hole, 110—Boss, 111—First threaded hole, 112—Second threaded hole 201—First piece, 202—Second piece, 203—First mounting hole, 204—Second mounting hole, 205—Ear, 206—Pressing part, 207—Allowing opening, 208—Matching hole, 209—Second strip hole, 210—Wire opening. 301—Torsion spring body, 302—First torsion spring arm, 303—Second torsion spring arm, 304—Third spring arm segment, 305—Second spring arm segment, 306—First spring arm segment, 307—Arc-shaped curved segment. Detailed Implementation

[0016] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0017] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] like Figures 1 to 7The bobbin case shown includes a bobbin case body 1, a pressure plate 2, and an elastic tensioning element. The bobbin case body 1 includes a bottom wall 101, a shaft portion 103 fixedly connected to the bottom wall 101 at one end, and a side wall 102 fixedly connected to the bottom wall 101 at one end. The side wall 102 is located around the shaft portion 103. The bottom wall 101, side wall 102, and shaft portion 103 form a bobbin mounting groove with one open end. The side wall 102 is provided with a guide hole 105 suitable for leading out the bobbin thread 7. The pressure plate 2 is installed on the outside of the side wall 102, and the end of the pressure plate 2 is provided with a guide opening 210 for guiding the bobbin thread 7. The elastic tensioning element includes a floating tension part, which is used to apply elastic tension to the bobbin thread 7 between the guide hole 105 and the guide opening 210. By using the above technical solution, the floating tension part applies elastic tension to the bobbin thread 7 between the guide hole 105 and the guide opening 210, so that the bobbin thread 7 maintains a certain tension, which can balance the tightness of the bobbin thread 7 and make the stitches of the bobbin thread 7 more uniform and beautiful. Because the tension section can float, it can automatically balance the tightness of the bobbin thread 7 within a certain range, thereby reducing the frequency of manual adjustment of the bobbin thread 7 tension of the bobbin assembly. Moreover, it is easier to adjust the bobbin thread 7 tension in place when manually adjusting it, which helps to improve adjustment efficiency.

[0019] It should be noted that elastic tension refers to the force applied to the bottom line by the floating tension part on the elastic tension member, the magnitude of which can be automatically adjusted according to the state of the bottom line.

[0020] In some embodiments, the elastic tension member is a spring member, the free end of which can float, and the spring force of which can provide tension to the bottom line 7. Using a spring member as the elastic tension member is easy to implement.

[0021] In some embodiments, the elastic tension member is a torsion spring 3, and the tension portion is disposed on the first torsion spring arm 302 of the torsion spring 3. The torsion spring 3 has two torsion spring arms, namely the first torsion spring arm 302 and the second torsion spring arm 303. According to the structural characteristics of the torsion spring 3, the first torsion spring arm 302 can swing around the central axis of the torsion spring 3, thereby allowing the tension portion disposed on the first torsion spring arm 302 to float. Using the torsion spring 3 as the elastic tension member has the characteristics of being easy to implement and easy to install.

[0022] Obviously, in practical implementation, in addition to torsion spring 3, other spring components can be used as elastic tension components, such as spring sheets.

[0023] In some embodiments, the first torsion spring arm 302 includes a torsion spring arm body, a first spring arm segment 306 extending inward relative to the torsion spring arm body, and a second spring arm segment 305 extending outward relative to the first spring arm segment 306, with a tension portion disposed on the second spring arm segment 305. Using the above technical solution, the tension portion on the second spring arm segment 305 can apply pressure to the bottom thread 7 along the swing direction of the first torsion spring arm 302. In a specific implementation, the outer peripheral surface of the second spring arm segment 305 constitutes the tension portion, and the outer peripheral surface of the second spring arm segment 305 contacts the bottom thread 7. It should be noted that the side closer to the bobbin mounting groove is the inner side, and the side farther from the bobbin mounting groove is the outer side.

[0024] As a specific example, the first torsion spring arm 302 includes a torsion spring arm body, a first spring arm segment 306, an arc-shaped curved segment 307, and a second spring arm segment 305 connected in sequence, with the arc-shaped curved segment 307 formed between the first spring arm segment 306 and the second spring arm segment 305, which has the characteristics of being easy to manufacture.

[0025] In some embodiments, the sidewall 102 is provided with a first strip hole 109 for avoiding the root of the second spring arm segment 305, and the pressure plate 2 is provided with a second strip hole 209 for avoiding the end of the second spring arm segment 305. The root of the second spring arm segment 305 extends into the first strip hole 109, and the end of the second spring arm segment 305 extends into the second strip hole 209. The tension portion is located in the gap between the pressure plate 2 and the sidewall 102. Using the above technical solution, the bottom line 7 is located in the gap between the pressure plate 2 and the sidewall 102. The two ends of the second spring arm segment 305 extend into the first strip hole 109 and the second strip hole 209 respectively, and the outer peripheral surface of the middle section of the second spring arm segment 305 contacts the bottom line 7, thus preventing the bottom line 7 from detaching from the second spring arm segment 305.

[0026] In some embodiments, a protruding portion 108 is provided on the sidewall 102, the torsion spring body 301 of the torsion spring 3 cooperates with the protruding portion 108, and the second torsion spring arm 303 of the torsion spring 3 is connected to the sidewall 102 or the pressure plate 2. By adopting the above technical solution, the torsion spring 3 is installed on the outside of the sidewall 102, which has the characteristic of easy installation.

[0027] As a preferred example, the end of the second torsion spring arm 303 is provided with a third spring arm segment 304 that bends outward and extends outward. The second torsion spring arm 303 extends into the gap between the pressure plate 2 and the side wall 102. The third spring arm segment 304 engages with the mating hole 208 on the pressure plate 2 to realize the connection between the second torsion spring arm 303 and the pressure plate 2.

[0028] In some embodiments, the pressure plate 2 is provided with a pressing portion 206 for radially pressing the bobbin mounted in the bobbin mounting groove. The pressing portion 206 increases the resistance experienced by the bobbin, providing tension to the bottom thread 7.

[0029] In some embodiments, a tension adjustment structure is provided between the pressure plate 2 and the side wall 102. This structure adjusts the tension between the pressure plate 2 and the side wall 102 to regulate the contact pressure between the pressure contact portion 206 and the bobbin mounted in the bobbin mounting groove. By manually adjusting the tension adjustment structure, the contact pressure between the pressure contact portion 206 and the bobbin mounted in the bobbin mounting groove can be adjusted, thereby regulating the tension of the bobbin thread 7. This adjustable pressure plate 2, used in conjunction with an elastic tension member, can meet the adjustment requirements of the bobbin thread 7 in the bobbin assembly.

[0030] As a preferred example, the tablet 2 includes a first part 201 and a second part 202. The first part 201 is provided with a first mounting hole 203 and a second mounting hole 204. The second part 202 is provided with an ear part 205 that bends inward and a pressing part 206. A wire opening 210 is formed between the ear part 205 and the main body of the second part 202, which is open on the side of the bottom wall 101. A protruding boss 110 is provided on the side wall 102. The boss 110 has a first threaded hole 111 and a second threaded hole 112. A first screw 4, passing through a first mounting hole 203 and engaging with the first threaded hole 111, fixes the first piece 201 to the boss 110. A second screw 5, passing through a second mounting hole 204 and engaging with the second threaded hole 112, forms a gap between the main body of the second piece 202 and the side wall 102. Adjusting the tightness of the second screw 5 adjusts the gap between the main body of the second piece 202 and the side wall 102, thereby adjusting the contact pressure between the contact part 206 and the bobbin installed in the bobbin mounting groove. In a specific implementation, the second mounting hole 204 is located on the side of the first piece 201 closer to the second piece 202, and the first mounting hole 203 is located on the side of the first piece 201 away from the second piece 202. In practice, the side wall 102 is usually provided with a clearance hole 106 for avoiding the ear 205 and a third strip hole 107 for the pressing part 206 to extend into the bobbin mounting groove.

[0031] Furthermore, the pressure plate 2 is provided with a clearance opening 207 for avoiding the protrusion 108 and the torsion spring body 301, and the second strip hole 209 is provided on the second plate portion 202.

[0032] As a preferred example, the first piece 201 and the second piece 202 are arranged sequentially along the circumference of the shuttle shell. The wire guide opening 210 is located at the end of the second piece 202. The wire guide hole 105 is closer to the first piece 201 than the wire guide opening 210. The outer peripheral surface of the second spring arm section 305 presses the bottom thread 7 in the direction away from the bottom wall 101, applying tension to the bottom thread 7.

[0033] In specific implementation, the side wall 102 is usually also provided with a wire groove 104 for the bottom wire 7 to be inserted into the wire hole 105. One end of the wire groove 104 is connected to the guide hole, and the other end of the wire groove 104 extends to the end of the side wall 102 facing away from the bottom wall 101.

[0034] In practice, the bottom of the shuttle body 1 is also connected to a fastener 6 for connecting with the wire frame.

[0035] In some embodiments, the bobbin case body 1 includes a magnetic attraction part adapted to magnetically attract a magnetic bobbin. By employing the above technical solution, the magnetic attraction between the bobbin case body 1 and the bobbin can prevent the bobbin from spinning freely, and also helps reduce the number of parts in the bobbin assembly. Furthermore, the tension of the bobbin thread 7 can be adjusted by replacing bobsbins with different magnetic properties, reducing the difficulty of manual adjustment and increasing the means of adjusting the bobbin thread 7 tension. In specific implementations, the bobbin case body 1 can be made of a metal material capable of magnetic attraction with a magnet, with the entire bobbin case body 1 constituting the magnetic attraction part; for example, a steel bobbin case body 1 can magnetically attract a magnet. Magnetic powder can be mixed into the bobbin or magnets can be embedded to make the bobbin magnetic; for example, magnetic powder can be uniformly mixed into the plastic body of the bobbin.

[0036] This utility model also proposes a bobbin assembly, including a bobbin case as described in any of the above claims and a magnetic bobbin. The bobbin is installed in a bobbin mounting groove, and the shaft portion 103 is engaged with the center hole of the bobbin. The bobbin case and the bobbin are magnetically attracted to each other.

[0037] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model. In the description of this specification, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A shuttle shell, characterized in that, Includes the shuttle body, pressure plate, and elastic tension element; The bobbin case body includes a bottom wall, a shaft connected to the bottom wall at one end, and a side wall connected to the bottom wall at one end. The side wall is located around the shaft. The bottom wall, the side wall, and the shaft form a bobbin mounting groove with one open end. The side wall is provided with a wire hole suitable for leading out the bottom thread. The pressure plate is installed on the outside of the side wall, and the end of the pressure plate is provided with a wire opening for guiding the bottom line; The elastic tension member includes a floating tension section for applying elastic tension to the bottom line between the wire hole and the wire opening.

2. The shuttle case according to claim 1, characterized in that, The elastic tension element is a spring.

3. The shuttle case according to claim 2, characterized in that, The elastic tension element is a torsion spring, and the tension part is disposed on the first torsion spring arm.

4. The shuttle case according to claim 3, characterized in that, The first torsion spring arm includes a torsion spring arm body, a first spring arm segment that bends inward relative to the torsion spring arm body, and a second spring arm segment that bends outward relative to the first spring arm segment, wherein the tension portion is disposed on the second spring arm segment.

5. The shuttle case according to claim 4, characterized in that, The sidewall is provided with a first strip hole for avoiding the root of the second spring arm segment, and the pressure plate is provided with a second strip hole for avoiding the end of the second spring arm segment. The root of the second spring arm segment extends into the first strip hole, and the end of the second spring arm segment extends into the second strip hole. The tension part is located in the gap between the pressure plate and the sidewall.

6. The shuttle case according to claim 3, characterized in that, The sidewall is provided with an outwardly protruding part, the torsion spring body of the torsion spring cooperates with the protruding part, and the second torsion spring arm of the torsion spring is connected to the sidewall or the pressure plate.

7. The shuttle case according to claim 1, characterized in that, The pressure plate is provided with a pressing part for radially pressing the bobbin mounted in the bobbin mounting groove.

8. The shuttle case according to claim 7, characterized in that, A tension adjustment structure is provided between the pressure plate and the side wall. The tension adjustment structure is used to adjust the tension between the pressure plate and the side wall, so as to adjust the contact pressure between the contact part and the bobbin installed in the bobbin mounting groove.

9. The shuttle case according to claim 1, characterized in that, The bobbin case body includes a magnetic attraction part, which is adapted to magnetically attract with a magnetic bobbin.

10. A bobbin assembly, characterized in that, It includes a bobbin case as described in any one of claims 1-9 and a magnetic bobbin, wherein the bobbin is installed in the bobbin mounting slot and the bobbin case and the bobbin are magnetically attracted to each other.

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