KR200395794Y1 - A rotary shuttle device with bobbin case body anti catching upper thread for sewing machine - Google Patents

Abstract

The present invention is configured to prevent the bobbin case body from being caught in the latch in the process of winding the upper thread, so that the sewing operation is smoothly performed and the workability and sewing quality are improved. It relates to a rotary book device.

The present invention for realizing this comprises a hook body mounted on a drive shaft, a bobbin case base and a bobbin case body accommodated in the hook body and studded at the bottom. Bobbin Case (Bobbin Case) and installed in the bobbin case and comprises a bobbin (Bobbin) wound around the bobbin (Bobbin), the bobbin case body (Bobbin Case Body) is spring-tapped on the end for the bobbin detachment and the tip is curved In the sewing machine rotary book device provided with a latch,

 The bobbin case body is curvedly extended to form a series of arcs in which the curl on the side where the spring is installed is connected to the curved end of the latch, and the inlet of the spring hole is formed in the curved extension part. .

Description

Rotating drum device for sewing machine with upper thread preventing bobbin case body {A ROTARY SHUTTLE DEVICE WITH BOBBIN CASE BODY ANTI CATCHING UPPER THREAD FOR SEWING MACHINE}

The present invention relates to a rotary book device of a sewing machine, and in particular, the bobbin case body is configured to prevent the latching phenomenon in the process of winding the upper thread, so that the sewing work is smoothly performed and workability and sewing quality are improved. It relates to a rotary book device of a sewing machine having a locking bobbin case body.

In general, the sewing machine is provided with a rotary book device 100 for supplying the lower thread, as shown in FIG. The rotary book device 100 is mounted on a drive shaft 110 rotatably connected to a power unit, also referred to as a hook body (Hook Body) 120, and a bobbin case housed in the hook body 120 ( Bobbin Case: BC) and the bobbin bobbin (Bobbin) 140 is wound around, the bobbin case (BC) is accommodated in the hook body 120, and also called the bobbin case base (Bobbin Case Base) ( 130 and a bobbin case body 150 for accommodating the bobbin from the outside of the bobbin 140.

Referring to the operation of the rotary book device schematically, the hook body 120 is rotated by the rotation of the drive shaft 110 and the bobbin is released from the bobbin 140 while forming a noose around the bobbin case (BC: 130,150) by walking the upper thread. The lower thread drawn-out hole 154, the tension spring 155 of the case body 150 and the lower thread drawn out through the guide groove of the bobbin case base are hooked on the upper thread noose to make the sewing work.

This sewing operation should have no obstacle in the middle so that the upper thread can walk up the lower thread smoothly while the tension between the upper thread and the lower thread is properly balanced.

On the other hand, the bobbin case body 150 is provided with a latch 151 for detaching the bobbin on the copper 152, and a spring 153 for the return operation of the latch is installed on one side of the latch 151. In addition, the front end of the latch is curved and the inlet of the spring hole 154 is formed to be cut at a right angle with respect to the latch 151. As a result, the latch 151 acts as a latching jaw when viewed from the upper thread winding operation trajectory. Done.

As such, the inlet 155 of the spring hole 154 is cut at right angles to the latch in the winding operation of the upper thread 2 so that the curved line of the ridge 152 and the curved leading end of the latch are one curved flow. It will not be connected to form a locking jaw bent at a right angle. Thus, as shown in FIG. 2, the upper thread 2 is caught in the latch 152, thereby causing a problem in that the sewing operation is interrupted due to a single yarn being generated.

As such, the spring hole inlet 155 of the flange is cut and formed at a right angle with respect to the latch, so that the bobbin case body 150 is inevitably faced for processing the ring hole 154 as long as the bobbin case body 150 is manufactured by mechanical cutting.

The present invention has been devised to solve the above problems,

The object of the present invention is that the latch spring hole inlet of the bobbin case body is formed side by side and narrow with respect to the latch, so that the phenomenon that the upper thread is caught in the latch during the winding operation of the upper thread is prevented so that the sewing work can be performed smoothly and the sewing workability and sewing The present invention provides a rotary drum device for a sewing machine having a bobbin case body for preventing the upper thread from being improved.

Rotating book device of the sewing machine having a bobbin case bobbin case body according to the present invention to achieve the above object is a hook body (Hook Body) mounted to the drive shaft, the hook body is accommodated in the bottom stud is installed The bobbin case body includes a bobbin case consisting of a bobbin case base and a bobbin case body and a bobbin installed in the bobbin case and wound with a bobbin thread, and the bobbin case body (Bobbin Case Body) is a sewing machine rotary book device having a latch which is spring-tightened to the end for the bobbin to detach the bobbin and the end is curved,

 The bobbin case body is curvedly extended to form a series of arcs in which the curl on the side where the spring is installed is connected to the curved end of the latch, and the inlet of the spring hole is formed in the curved extension part. .

Hereinafter, with reference to the accompanying drawings, an embodiment of a rotary book device of a sewing machine having a bobbin case preventing bobbin case body of the present invention will be described in more detail.

Figure 3 is an exploded perspective view of a rotary book device of an embodiment according to the present invention, Figure 4 is a perspective view of the bobbin case body in Figure 3 from another perspective, Figure 5 is an assembly side view showing an operating state of the present invention.

3 to 5, the rotary book device 1 of the sewing machine having the upper thread locking bobbin case body of the embodiment according to the present invention is a hook body (Hook Body) (mounted to the drive shaft 10) ( 20), a bobbin case made of a bobbin case base 30 and a bobbin case body 50 accommodated in the hook body 20 and a stud 31 is placed at the bottom ( Bobbin Case (BC) and installed in the bobbin case (BC) and comprises a bobbin (Bobbin) 40 is wound around the bobbin (Bobbin Case Body) 50 is the bobbin 40 In the sewing machine rotary book device is provided with a latch 51 which is supported by a spring (52) on the flange 52 for the purpose of desorption of the bobbin case, the bobbin case body 50 is the spring 53 is installed The side of the hook 52 has a series of flows in which the flow is connected to the curved tip 51a of the latch 51. A curved extension is formed to form an arc, and the inlet 55 of the spring hole is recessed in the curved extension 52a.

Here, the tip of the curled curved extension portion 52a is formed close to the curved leading end 51a of the latch so that the upper thread 2 deviating from it is directly passed over to the curved leading end 51a of the latch.

In other words, in the present invention, the right angled cut portion formed at right angles with respect to the latch is formed at the curved portion of the ribbon for spring hole processing, so that the curved extension portion 52a of the ribbon is adjacent to the curved leading edge 51a of the latch. Extending, the spring hole inlet 55 is concavely formed in parallel with the arrangement direction of the latch 51 and narrow.

The bobbin case body 50 of the present invention is manufactured by powder injection molding.

According to the present invention of the above configuration, the curved extension portion 52a is formed at the corner of the bobbin case body 50, and the spring hole inlet 55 is formed side by side with the latch 51 so as to wind up the upper thread 2. In the process of moving up and away from the curved part of the copper during operation, the curved extension part 52a is directly skipped to the curved leading edge 51a of the latch, which prevents the phenomenon that the upper thread is caught in the latch and thus the sewing operation is smoothly performed. Improve sewing workability and sewing quality.

In the above, preferred embodiments of the present invention have been described with reference to the accompanying drawings. Here, the terms or words used in the present specification and claims should not be construed as being limited to ordinary or dictionary meanings, but should be construed as meanings and concepts corresponding to the technical spirit of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical ideas of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

As described in detail above, the rotary book device of the sewing machine provided with the upper thread stopping bobbin case body according to the present invention, the spring hole inlet is formed side by side and narrowly with respect to the latch, the upper thread is in the latch during the winding operation of the upper thread There is an excellent effect to prevent the catching phenomenon to perform the sewing operation smoothly and improve the sewing workability and sewing quality.

1 is an exploded perspective view of the prior art

Figure 2 is a side view of the assembled state of the prior art exemplary trouble in use of Figure

3 is an exploded perspective view of an embodiment according to the present invention

Figure 4 is a perspective view from another direction of the bobbin case body according to the present invention

Figure 5 is an assembled state side use state of Figure 3

* Explanation of symbols for main parts of the drawings

1: rotary book device 10 of the present invention: drive shaft

20: hook body BC: bobbin case

30: bobbin case base 40: bobbin

51: latch 51a: curved end

52: ridge 52a: curved extension

53: spring 55: spring hole inlet

100: conventional rotary book device 2: upper thread

Claims (3)

Hook body 20 mounted on drive shaft 10, bobbin case base 30 and bobbin case housed in hook body 20 and stud 31 is placed on the bottom Bobbin Case (BC) consisting of a body (Bobbin Case Body) 50 and the bobbin (Bobbin) 40 is installed in the bobbin case (BC) and is wound around the bobbin (Bobbin) is configured, the bobbin case Body (Bobbin Case Body) (50) In the sewing machine rotary book device is provided with a latch (51) which is supported by a spring (53) on the flange 52 for the removal of the bobbin 40, the tip is curved, The bobbin case body 50 is curvedly extended to form a series of arcs in which the curl 52 on the side where the spring 53 is installed flows with the curved tip 51a of the latch 51. Rotating drum device of the sewing machine provided with the upper thread locking bobbin case body, characterized in that the inlet 55 of the spring hole is formed in the curved extension portion (52a). The method of claim 1, The tip end of the curled curved extension portion 52a is provided with an upper thread catching bobbin case body characterized in that the upper thread out of here is formed close to the curved tip 51a of the latch so that the upper thread goes straight to the curved tip 51a of the latch. Rotary book device of a sewing machine. The method of claim 1, The curved extension portion 52a of the curl is extended to be adjacent to the curved tip 51a of the latch, The spring hole inlet 55 is a rotary drum device of a sewing machine having a bobbin case body of the upper thread catching, characterized in that the concave and narrow indentation and parallel to the arrangement direction of the latch 51.