Bobbin case and auxiliary wear-resistant pressing piece assembly thereof

By side-moving the through grooves and inserting C-shaped ceramics into the wire holes in the sewing machine shuttle housing, the problems of bobbin reversing and thread adjustment are solved, and stable sewing effect and wear resistance are achieved to adapt to different thread types.

CN222294399UActive Publication Date: 2025-01-03SHAOXING SHENGQUAN PRECISION MASCH CO LTD
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Patent Information

Application Number
CN202420903598.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-28
Publication Date
2025-01-03
Estimated Expiration
2034-04-28

AI Technical Summary

Technical Problem

The existing sewing machine shuttle shells are prone to bobbin reversal when the machine pace changes, and the thread types of different bottom lines need to adjust the compression degree between the pressing tablet and the bottom line, which is inconvenient to operate, resulting in the scrapping of sewing or embroidery.

Method used

A shuttle housing including a hollow shell, a hollow shaft and a wire groove is designed. By moving the through grooves on the peripheral wall, and movably connecting the plastic block at the front end of the pressing plate, the friction edge of the plastic block is abutted from the edge of the bobbin. And adjust the friction force by adjusting the bolts to avoid reversing the bobbin, and at the same time, C-shaped ceramics are inserted into the wire holes to increase wear resistance.

Benefits of technology

It effectively avoids bobbin reversal, is suitable for various linear types without adjusting bolt screwing, improves convenience of use and wear resistance, and extends service life.

✦ Generated by Eureka AI based on patent content.

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Abstract

The bobbin case comprises a hollow case body, the case body comprises an upper cover and a peripheral wall extending upwards from the peripheral edge of the upper cover, a hollow shaft is integrally formed in the upper cover, a bobbin is rotationally installed on the hollow shaft and located in the peripheral wall, the bobbin comprises a flange part and a cylinder part on the two sides, and the flange part and the cylinder part are arranged on the two sides of the bobbin. The peripheral wall is provided with a wire guide groove, the wire guide groove is communicated with a wire guide hole, the wire guide groove and the wire guide hole are arranged on the peripheral wall in a lateral displacement manner, one side of the peripheral wall is provided with a through groove, and the front end of the pressing sheet is movably connected with a plastic block. The thread guide groove and the thread guide hole are laterally moved, the through groove is formed in one side, the front end of the pressing piece is movably connected with the plastic block, the front end of the plastic block forms an extending friction edge towards the inner side, the friction edge is arranged in the through groove and abuts against the edge of the shuttle peg, and the friction force between the friction edge and the shuttle peg is adjusted through screwing of the adjusting bolt. The shuttle peg is prevented from rotating reversely due to the fact that a machine adjusts the shuttle peg fast and slow or changes the speed, and the shuttle peg is directly limited, so that the shuttle peg is suitable for screwing of various line types without adjusting bolts.
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Description

Technical Field

[0001] The utility model relates to the field of sewing machine accessories, in particular to a bobbin case and an auxiliary wear-resistant pressing sheet component thereof. Background Art

[0002] The bobbin case is a mechanical component commonly found in sewing machines or embroidery machines. Nowadays, the thread member of the bobbin case is a spring winding hook. When the bobbin case is in use, the bottom thread in the bobbin is introduced into the thread groove, and is guided to the thread hole through the thread clamping spring and supported by the thread hook, and then pulled out along the thread groove through the thread member.

[0003] Since the machine speed changes from fast to slow / changes speed (such as from 1200r / min to 500r / min), the bobbin may easily turn inversely. Figure 1 As shown in the patent (refer to patent number CN102108608A, entitled "Sewing Machine Bobbin Case"), conventional designs prevent the above problems by adjusting the degree of compression / friction between the pressing plate and the bottom line. However, when the conventional pressing plate is used for a long time, the thread hairs will be stuck inside the pressing plate, and the thread will not pass through or the bottom line will turn up too fast, causing the sewing embroidery to be scrapped. At the same time, the application of different bottom line types also requires the degree of compression between the pressing plate and the bottom line to be readjusted, which is not convenient to operate.

[0004] This case was created to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a bobbin case and an auxiliary wear-resistant pressing sheet assembly thereof, which solve the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented through the following technical solutions: a bobbin case and its auxiliary wear-resistant pressing sheet assembly, including a hollow shell, the shell including an upper cover, a peripheral wall extending upward from the periphery of the upper cover, a hollow shaft integrally formed in the upper cover, a bobbin core is rotatably mounted on the hollow shaft and is located in the peripheral wall, the bobbin core includes flange portions and a cylindrical portion on both sides, a wire groove is opened on the peripheral wall, a wire groove is connected to the wire groove, the wire groove and the wire hole are arranged sideways on the peripheral wall, and a through groove is provided on one side thereof, the front end of the pressing sheet is movably connected to a plastic block, the front end of the plastic block is partially embedded in the inner side of the through groove and conflicts with the position of the flange portion of the bobbin core.

[0009] As a preferred solution, further, a plug hole is opened on the plastic block, and the end of the pressing piece forms an insert block, and the plastic block is movably connected to the end of the pressing piece by inserting.

[0010] As a preferred solution, further, the front end of the plastic block forms an extended friction edge inward, the friction edge is placed in the through groove and abuts against the edge of the bobbin, and the friction strength with the bobbin is adjusted by screwing the adjusting bolt.

[0011] As a preferred solution, further, a protrusion is provided on the inner side of the friction edge, and the protrusion has a rounded corner and is arc-shaped in the longitudinal direction.

[0012] As a preferred solution, further, the protrusion is located between the two flange parts and abuts against the inner side edge of one of the flange parts.

[0013] As a preferred solution, further, a C-shaped ceramic is inserted into the wire hole, the C-shaped ceramic hole is arc-shaped, and the shape of the C-shaped ceramic is T-shaped or I-shaped.

[0014] (III) Beneficial effects

[0015] After adopting the above technical solution, the bobbin case and its auxiliary wear-resistant pressing sheet assembly provided by the utility model have the following beneficial effects compared with the prior art:

[0016] 1. Move the wire groove and wire hole sideways, and set a through groove on one side. The front end of the pressing piece is movably connected to a plastic block. The front end of the plastic block forms an extended friction edge inward. The friction edge is placed in the through groove and abuts against the edge of the bobbin. The friction force with the bobbin is adjusted by screwing the adjusting bolt to avoid the reversal of the bobbin caused by the machine's fast and slow steps / speed change. The bobbin is directly restricted in a way that is suitable for various thread types without the need to adjust the screwing of the bolt.

[0017] 2. A protrusion is provided on the inner side of the plastic block, which has rounded corners and is arc-shaped in the longitudinal direction, wherein the protrusion is located between the two flange portions and abuts against the inner side edge of one of the flange portions, so that the bobbin can be supported under normal conditions, and the bobbin can be pulled out by the arc-shaped angle design of the protrusion by pulling hard, thereby removing the restriction of the protrusion.

[0018] 3. C-shaped wear-resistant ceramics are inserted into the wire hole. The wear-resistant ceramics can withstand long-term wear of the yarn, and the longitudinal section of the C-shaped ceramics is T-shaped, which can be easily replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a conventional bobbin case;

[0020] Figure 2 It is a schematic diagram of the utility model;

[0021] Figure 3 It is a schematic diagram of the bobbin case after the pressing sheet is removed according to the utility model;

[0022] Figure 4 This is a schematic diagram of tabletting of the utility model;

[0023] Figure 5 This is a schematic diagram of the disassembly of the tablet of the utility model;

[0024] Figure 6 This is a schematic diagram of the cooperation between the front end of the pressing piece and the bobbin of the utility model;

[0025] Figure 7 This is a front view of the utility model after adding a ceramic hook and assembling along the inner side of the bobbin case;

[0026] Figure 8 This is a front view of the utility model after adding a ceramic hook and assembling along the outer side of the bobbin case;

[0027] Fig. 9 This is a front view of the utility model after adding a ceramic hook and opening the angle slot along the inner side of the bobbin case to one side;

[0028] Fig.10 It is a front view of the utility model after adding a ceramic hook and opening along the angle slot inside the bobbin case to the other side;

[0029] Fig.11 This is a supplementary side elevation view of the utility model after adding a ceramic hook and opening the angle slot on the inner side of the bobbin case to one side;

[0030] Fig.12 This is a supplementary lateral front view of the utility model after adding a ceramic hook and opening the angle slot along the outer side of the bobbin case to one side;

[0031] In the figure, 1, shell; 2, upper cover; 3, peripheral wall; 4, notch; 5, ceramic hook; 51, convex part; 52, narrow groove; 6, slot; 7, threaded hole; 8, hole position; 9, virtual encirclement; 10, bobbin; 01, flange part; 02, cylindrical part; 11, wire groove; 12, wire hole; 13, fixing bolt; 14, pressing piece; 15, adjusting bolt; 16, through groove; 17, plastic block; 18, jack; 19, plug block; 20, friction edge; 21, protrusion; 22, C-shaped ceramic; 23, screw hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0033] See attached Figure 2-3As shown, it includes an upper cover 2, a peripheral wall 3 extending upward from its periphery, a hollow shaft is integrally formed in the upper cover 2, a bobbin 10 is rotatably mounted on the hollow shaft and is located in the peripheral wall, the bobbin 10 includes a flange portion 01 and a cylindrical portion 02 on both sides, a wire groove 11 is opened on the peripheral wall, and a wire hole 12 is connected to the wire groove 11, and a pressing plate 14 is fixed on the peripheral wall by a fixing bolt 13, and the pressing plate 14 is adjusted to adjust the degree of fit with the peripheral wall by an adjusting bolt 15.

[0034] A C-shaped ceramic 22 is inserted into the wire hole 12. The C-shaped ceramic hole is arc-shaped (mainly reflected in the arc-shaped part of the wire passing through the C-shaped ceramic hole). The C-shaped ceramic is T-shaped or I-shaped, which makes it easy to insert the wire hole 12.

[0035] See attached Figure 3 As shown in the figure, as an improvement, the wire groove 11 and the wire hole 12 are moved sideways, and a through groove 16 is provided on one side. The front end of the pressing piece 14 is movably connected to a plastic block 17, and the front end of the plastic block 17 is partially embedded in the inner side of the through groove 16.

[0036] As attached Figure 4-5 As shown, a plug hole 18 is provided on the plastic block 17, and an insert block 19 is formed at the end of the pressing plate 14. The plastic block 17 is movably connected to the end of the pressing plate 14 by inserting. The front end of the plastic block 17 forms an extended friction edge 20 to the inside, and the friction edge 20 is placed in the through groove 16 and abuts against the edge of the bobbin 10, and the friction force with the bobbin 10 is adjusted by screwing the adjusting bolt 15. This solution adjusts the friction force between the wear-resistant plastic block 17 and the bobbin 10 to replace the friction force between the pressing plate 14 and the bottom line, so as to avoid the machine step speed change (such as rapid reduction from 1200r / min to 500r / min), which easily causes the bobbin 10 to reverse. At the same time, by directly limiting the bobbin core 10, it is suitable for various thread types without the need to adjust the screwing of the bolt, that is, the bobbin case only needs to be adjusted once corresponding to the bobbin core, no matter whether thick thread, thin thread, hard thread, soft thread, elastic thread, thickened thread, ultra-fine thread, or wooly thread is used, there is no need to adjust the pressure or tension.

[0037] Screw holes 23 are provided on the peripheral wall at positions corresponding to the adjusting bolts 15 and the fixing bolts 13 .

[0038] As attached Figure 4 , 6 As shown, a protrusion 21 is provided on the inner side of the plastic block 17, and the protrusion 21 has rounded corners and is arc-shaped in the longitudinal direction, wherein the protrusion 21 is located between the two flanges 01 and abuts against the inner side edge of one of the flanges 01. The above design enables the bobbin 10 to be supported in a normal state, and the bobbin 10 can be pulled out by the arc-shaped angle design of the protrusion 21, removing the restriction of the protrusion 21.

[0039] See attached Figure 7-12As shown, an improvement of a bobbin case with an additional ceramic hook is as follows, comprising a hollow shell 1, the shell 1 comprising an upper cover 2, a peripheral wall 3 extending upward from the peripheral edge of the upper cover 2, a notch 4 for the bottom line to enter and exit is opened on the peripheral wall 3, the notch 4 extends downward from the top edge of the peripheral wall 3 to the upper cover 2, a wire structure is detachably installed on the upper cover 2 and directly below the notch 4, and the wire structure limits the bottom line led out from the notch 4.

[0040] The wire structure is a ceramic hook 5 made of wear-resistant ceramic or glass. The ceramic hook 5 includes an outwardly extending protrusion 51, on which a narrow slot 52 is formed for the bottom line to pass through. The narrow slot 52 of the ceramic hook 5 is arranged along the inner angle of the bobbin case, and its opening direction is located in a clockwise direction. The ceramic hook 5 is harder than iron, and the spring winding hook 10 cannot be made too thick due to the spiral arrangement method, and is easy to break. Compared with the ceramic hook 5, the application stability and durability are worse.

[0041] Secondly, from the processing point of view, as shown in the attached Figure 11-12 As shown, the spring wire winding hook 10 is inserted horizontally at one end to the outer end of the bobbin case (upper cover 2), and the upper cover 2 is longitudinally provided with a notch corresponding to the spring wire winding hook 10. By virtue of the iron material of the spring wire winding hook 10, the inserted spring wire winding hook 10 can be partially bent and blocked in the upper cover 2 by punching in the notch, so as to achieve the limited fixation of the spring wire winding hook 10. However, if the iron spring wire winding hook 10 is only replaced with a more wear-resistant ceramic or glass material, the above processing and installation method cannot be achieved (the ceramic material cannot be bent).

[0042] See attached Figure 6-7 As shown, in this solution, the ceramic hook 5 is directly opened at the hole position 8, and a slot 6 is opened inward from the outer end surface of the upper cover 2 toward the notch 4. The convex part 51 of the ceramic hook 5 is placed in the slot 6, and the slot 6 is provided with a threaded hole 7. At this time, the convex part 51 of the ceramic hook 5 is placed in the slot 6, and the hole position 8 on the convex part 51 of the ceramic hook 5 is aligned with the threaded hole 7 on the slot 6, and the two are threadedly connected and fixed with bolts (or rivets or holes are used instead of threaded holes and bolts for fixing). The ceramic hook 5 is detachably installed on the upper cover 2, which is more flexible than the installation method of the spring winding hook 10, and can be quickly disassembled and replaced.

[0043] Furthermore, the ceramic hook 5 can be installed on the upper cover 2 according to the position and angle of the slot 6, so that the direction of appearance can be set according to the bottom line during operation, thereby reducing the friction between them as much as possible and increasing the service life. Figure 9-12 As shown, the slot 6 is opened on the inner side of the upper cover 2, and its opening angle is 0-180° relative to the upper cover 2. Of course, the slot 6 is opened on the outer side of the upper cover 2, and its opening angle is 0-180° relative to the upper cover 2. Figure 5 , 6The examples of the slot 6 being opened relative to the inner and outer sides of the upper cover are further supplemented (the angle of the bobbin case facing the slot 6 is viewed from the side). The specific opening method depends on the production and processing needs, but the above assembly application methods are all within the scope of protection of this application.

[0044] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bobbin case and its auxiliary wear-resistant pressing sheet assembly, comprising a hollow shell, the shell comprising an upper cover, a peripheral wall extending upward from the periphery of the upper cover, a hollow shaft integrally formed in the upper cover, a bobbin core rotatably mounted on the hollow shaft and located in the peripheral wall, the bobbin core comprising flange portions and a cylindrical portion on both sides, a wire groove is opened on the peripheral wall, and a wire hole is connected to the wire groove, characterized in that: The wire groove and the wire hole are arranged on the side of the peripheral wall, and a through groove is set on one side. The front end of the pressing sheet is movably connected to a plastic block, and the front end of the plastic block is partially embedded in the inner side of the through groove and conflicts with the flange position of the shuttle core.

2. A bobbin case and its auxiliary wear-resistant pressing sheet assembly according to claim 1, characterized in that: The plastic block is provided with an insertion hole, the end of the pressing sheet forms an insertion block, and the plastic block is movably connected to the end of the pressing sheet by means of insertion.

3. A bobbin case and its auxiliary wear-resistant pressing sheet assembly according to claim 2, characterized in that: The front end of the plastic block forms an extended friction edge toward the inside, the friction edge is placed in the through groove and abuts against the edge of the bobbin, and the friction strength with the bobbin is adjusted by screwing the adjusting bolt.

4. A bobbin case and its auxiliary wear-resistant pressing sheet assembly according to claim 3, characterized in that: A protrusion is arranged on the inner side of the friction edge, and the protrusion has a rounded corner and is arc-shaped in the longitudinal direction.

5. A bobbin case and its auxiliary wear-resistant pressing sheet assembly according to claim 4, characterized in that: The protrusion is located between the two flange parts and abuts against the inner side edge of one of the flange parts.

6. A bobbin case and its auxiliary wear-resistant pressing sheet assembly according to claim 1, characterized in that: A C-shaped ceramic is inserted into the wire hole. The C-shaped ceramic hole is arc-shaped. The C-shaped ceramic is in a T-shape or an I-shape.