TWM242523U - Shuttle cartridge for sewing machine - Google Patents

Description

M242523 V. Creation Instructions (1) [Technical Field] This creation relates to a bobbin E used in a sewing machine to house a bobbin, which is used to wind the bottom thread. [Previous technology] Although there are many types of modern sewing machines for home and various specialized industrial production applications, the basic principle has not changed. All of these sewing machines have a curved lead pin that moves in a solitary groove with a stitch (on the thread) ) Through the fabric 'interlocks with the bobbin carried by the bobbin on the other side of the fabric that moves back and forth to shape the fabric. As shown in the first and second figures, the bobbin 6 described by the customer can be rotatably mounted on the bobbin case 8 'The bobbin case 8 has a casing 8 1 for receiving the bobbin 6, The casing 8 1 has a wire exit groove 8 2 that extends obliquely to the edge, and an elastic piece 8 3. The elastic piece 8 3 is substantially arc-shaped, and one end is fixed to the casing 8 1 with a screw 8 4. The end crosses the wire groove 8 2 and forms a wire portion 8 5, so that the elastic piece 8 3 can partially cover the wire groove 8 2, and a screw 86 is used to adjust the gap between the elastic piece 8 3 and the circumferential portion of the casing to make the bottom line 7 is pulled out of the bobbin 6 with appropriate tension. In addition, a bolt 8 7 for fixing the bobbin case 8 to an inner barrel (not shown) is provided at the bottom of the housing 8 1, and the bolt 8 7 is stretched in the radial direction by the elastic restoring force of a compression spring 8 8. The lever 8 9 is pushed out of the housing 8 1 and penetrates the plug 8 7 and is hinged on the bottom of the housing. When the lever 8 is turned upward, the plug 8 7 can be retracted to release the lock, and the bobbin case 8 can be moved from the inside. Remove the syringe. Before the bobbin case 8 is set on the inner barrel, the bobbin 6 winding the lower thread 7 is put into the bobbin case 8, and then the free end of the bottom thread 7 is passed through the outlet groove.

M242523 V. Creation instructions (2) 8 2 Guide under the shrapnel 8 3, and then pull out through the wire section 85, and as the sewing action proceeds, the bottom thread 7 will be pulled out, and the bobbin 6 will be in the bobbin case. 8 rotations. As described above, the bobbin 6 is rotated while pulling out the lower thread 7. Therefore, the coefficient of dynamic friction between the bobbin 6 and the bobbin case 8 needs to be small, so that the bobbin 6 can rotate freely, and the wear and tear and power loss due to friction are reduced. Therefore, the bobbin case 8 made of a metal material is usually surface-treated in some manner. The purpose of surface treatment is to look good on the one hand, and to reduce the friction coefficient on the other hand, but because the coating is a metal material, its friction coefficient is large. Larger, at the same time, the resistance encountered when the bottom thread 7 exits is also large, which is not conducive to the sewing operation. Furthermore, the tension of the bottom thread when the bottom thread 7 is fully wound on the bobbin 6 is very different from that when it is almost absent; generally, the tension when the bottom thread 7 is almost absent is about half that when the bottom thread 7 is wound on the bobbin 6. In addition, as the bobbin thread volume decreases during sewing, the bobbin thread tension gradually decreases despite the same amount of bobbin thread being pulled out, and the variation in the bobbin thread tension is one of the causes of uneven stitching. Although the conventional bobbin case 8 is provided with an elastic piece 8 3 capable of adjusting the tension of the lower thread 7, it is inefficient, and in particular, it cannot keep the tension constant as the amount of the lower thread changes. On the other hand, when the bobbin case 8 is not accurately fixed to the inner needle cylinder, or the bottom thread 7 is not guided smoothly, as a result, the bottom thread 7 enters from the free end slightly lifted by the lever 8 9 and is wound around the bobbin case 8. The danger is that if the bottom thread 7 cannot be cut off in time, the bobbin case 8 will be seriously damaged. [New content]

M242523

Therefore, the purpose of this creation is to provide a bobbin case for a sewing machine. Two and two f can reduce the dynamic friction coefficient when the bobbin rotates, and make the bobbin's rotation more smooth, and at the same time minimize the resistance of the lower thread exit. By. Another purpose of Eclipse creation is to provide a bobbin 11 which can maintain a constant thread tension ′ i f to ensure a uniform and consistent seam mesh without the need for eight horses to operate the adjuster. A further aim of the creation is to provide a bobbin case which can be used. Cut off the bottom line of the bobbin case to avoid damaging the bobbin case. @ ^ The bobbin case created by Ϊ has a layer f on the surface of the bobbin case; in particular, a fluorine resin called Teflon. ^ Α The circumference of the casing is also provided with a tension spring for winding the bottom coil of the bobbin to pull out the bottom thread by the fixed tension of the cable spring. It is called to push the edge of the product bar that is inserted into the inspection and is provided with a cutting edge, which can automatically entangle the bottom line of the bobbin case. Μ μ ^ ϋ The technical means and other features used in this creation to achieve the above purpose :, the characteristics can be fully understood by referring to the following preferred implementation with the drawings. [Embodiment] As shown in the third to fifth figures, the bobbin case 10 includes a casing, a circumferential portion 12 and a bottom chamber 1 3 for receiving the bobbin 6 extending in the axial direction. The outer surface of the bobbin shaft 4 includes a mounting groove to realize the creation of the "sewing machine". The body 1 has a bottom 11, 1, and 81 defined by the peripheral portion 12 and a bottom 11 The center of the inner surface is to support the rotation of the bobbin 6. Among them, the bottom portion 15 'and the circumferential portion 12 have an inclined M242523. V. Creation instructions (4) The outlet groove 16 extending to the edge. The casing 1 also has a fluororesin coating (not shown) formed on its surface to reduce the coefficient of friction. Fluororesin (: ^ 111〇]: 丨 116 ^ 3 丨 11) is more commonly known as a resin called Teflon (T ef 1 ο η). The reason for using this type of tree is because of its friction The coefficient is small, the noise is small, and it can be used under non-lubricated bears. It is very suitable as a coating on the surface of the casing 1, which can greatly destroy the coefficient of kinetic friction when the shuttle 6 rotates in the shuttle box 10, so that The bobbin 6% turns more smoothly while minimizing the resistance of the bottom line 7. The housing assembling groove 15 is used to receive a plug 2 for linear movement. One side of the assembling groove 15 is provided with a hole (not shown) for a pressure elastic element 2 5 to be partially inserted. The spring 2 5 The other end is supported by the bolt 2. ^ With the cooperation of the lever 3, the bolt 2 is often pushed out of the housing 1 using its elastic restoring force; accordingly, the bobbin case 10 is set into the inner syringe (not shown in the figure) (Shown), the plug 2 will be forced to withdraw. 俾 After the bobbin case 10 is installed, it is automatically reset and inserted into the inner syringe with spring force, and the bobbin case 10 is fixed to the inner syringe. The lever 3 has opposite two fixed ends penetrating plugs 2 彳 & hinged to the bottom 1 1 of the housing, so that the lever 3 can be supported by the housing 1 and manually operated; the free end of the lever 3 It ’s slightly raised. It ’s easy for your finger to pull the lever 3 to push the plug 2 to retract in the radial direction to release the lock. Take out the bobbin case 10 from the inner syringe, and the spring 25 is compressed. When accumulating elastic energy, when the lever 3 is released, the bolt 2 is pushed back to the original position by the elastic force of the spring 25. The bobbin case 10 further includes an elastic piece 4, one end of which is fixed to the circumferential portion of the casing 1 2 ′ by the reeling wire 4 1 and extends to the exit end.

M242523 V. Creation Instructions (5) / 冓 16 ° Note: In the embodiment of the drawings, the shrapnel 4 no longer has the function of pinching the bottom line 7, but is used to fix the tension spring (tensin spring). 5. At the same time, the free end female needs to form a wire part as usual in the bobbin case. The tension spring 5 is formed by bending a steel wire of appropriate thickness, one end is sandwiched between the elastic piece 4 :: = the circumferential portion 12, and then the screw 4 2 is used to lock the parallel winding portion G of the circumferential portion 11 of the casing from Ϊ Based on this, you can use two: ί ::: 线 线 部 5 1-圈 a Yutian pull line elastic yellow leased line 7 without manual adjustment to ensure that the outgoing line ^ The mesh can be uniform. Under fixing, the material used for tensioning the spring 5 must have strong toughness. Therefore, in addition to spring steel, it also has strength and piano wire or stainless steel wire. Wooden steel wire and steel As described in the prior art, when the bobbin case is not accurately fixed or the bottom thread is not guided smoothly, the bottom thread will be from the free end of the lever to the bobbin case, making the sewing operation impossible. Therefore, in the winding example, as shown in the third and fifth figures, the edge of the lever 3 is the best, and the opening 3 1 can be automatically cut and entangled in the bobbin case 10, and the cleaver is damaged. Craftsman 1 〇. -V t 7, to avoid the bobbin case created according to this, because the surface of the shell is coated with grease, it can reduce the movement of the bobbin when it rotates = the fluorine tree bobbin can rotate more smoothly, and at the same time the bottom line The coefficient of exit resistance 咚 "coefficient, so that, by pulling the fixed tension of the elastic spring to pull out the minimum. Maintain a fixed exit tension to ensure uniform seams and dreams, ~, make the bottom line ^ and omit adjustments

M242523 V. Creation Instructions (6) Trouble of tension. In addition, the cutting edge on the edge of the lever can automatically cut the bottom line entangled in the bobbin case to avoid damaging the bobbin case. Of course, the above embodiments may be changed in a number of ways without departing from the spirit and scope of the present invention. Therefore, all matters included in the above description and shown in the accompanying drawings should be regarded as illustrative rather than restrictive.

Page 10 M242523 Brief description of the drawing The first picture is the external view of the bobbin mounted on the conventional bobbin case, showing the bottom line being taken out. The second figure is a central longitudinal sectional view of the first figure. The third picture is the appearance of the bobbin case created based on this. The fourth picture is the front view of this creation. The fifth picture is the top view of this creation. The sixth picture is the external view of the bobbin case installed in this creative bobbin case, showing the bottom line being taken out. The seventh figure is a central longitudinal sectional view of the sixth figure. The eighth figure is a schematic view of the bottom thread entangled in the bobbin case. Description of component symbols: 1 • • • housing 2 • • plug 3 • • • lever 4 • • • spring 5 • • tension spring 6 • • • bobbin 7 •. • bottom thread 8 • • bobbin case 1 0 · •• Bottle case 1 1 • •• Bottom 1 2 • • Circumferential part 1 3 ••• Bottle chamber 1 4 • •• Bobble shaft 1 5 •• Pressure spring 3 1 • • Cutting knife 〇4 1 • •• Screw 4 2 • •• Screw 5 1 • • Thread winding section 8 0 • • • Bobbin case 8 1 • • • Housing 8 2 Groove 8 3 • • • spring 8 4 • • • screw 8 5 • • lead 8 8 • • • screw 8 7 • • • plug 8 8 • • pressure spring 8 9 • • lever

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Claims (1)

M242523 The scope of the patent application for a sewing machine for a sewing machine includes: a peripheral part; a bottom part, a peripheral part, a bottom part and a circle extending from the heart to the ventricle 'and a shaft along the axis from the center of the inner surface of the bottom part There are assembly grooves on the outer surface of the bottom part, and there is an assembly groove on the outer surface of the bottom, and a circle of grooves that extends obliquely to the edge; The elastic restoring force of the pressure stomach spring is pushed out of the casing; the fixed end of the core rod is hinged to the bottom of the casing after penetrating the plug, and is held by the bottom of the casing to be manually operated to pull the bolt back; , One end is fixed to the circumferential portion of the housing, the opposite end passes over the line groove and forms a wire portion, and at the same time, a screw for adjusting the gap between the elastic piece and the circumferential portion of the body; 〃 /, characterized by 'the body A fluororesin coating formed on a surface thereof to reduce a friction coefficient. A bobbin case for a sewing machine includes: a casing having a bottom portion, a circumferential portion, a shuttle chamber defined by the bottom portion and the circumferential portion, and One A bobbin shaft extending in the axial direction from the center of the inner surface of the bottom, wherein the outer surface of the bottom is provided with a mounting groove, and the circumferential portion has an outlet groove extending obliquely to the edge; And is pushed out of the housing by the elastic restoring force of a pressure bomb; a lever, the fixed end of which penetrates the plug and is connected to the bottom of the housing, and can be supported by the bottom of the housing to be manually operated to pull the plug return; M242523 6. Scope of patent application and an elastic piece, one end is fixed to the circumferential portion of the casing, and the opposite end extends to the outlet groove; it is characterized by a tension spring, one end of which is fixed between the elastic piece and the circumferential portion of the casing The opposite end forms a winding part for winding the bottom thread wound on the bobbin from the outlet groove. 3. The bobbin case of the sewing machine according to item 2 of the scope of patent application, wherein the surface of the casing is formed with a fluororesin coating. 4. The bobbin case for a sewing machine according to any one of claims 1 to 3, wherein the edge of the lever is provided with a cutting edge. Page 13 1395