JPS5921752Y2 - sewing machine needle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a sewing machine needle used for sewing machine work or similar work.

In the structure of a normal sewing machine needle, a long groove for thread guidance is formed from the needle hole toward the handle only on the side of the needle where the thread extends toward the supply spool, and the thread extends toward the workpiece. A short groove is formed on the other side.

Therefore, since the threading needle hole is common and long grooves and short grooves are provided opposite each other on both sides of the threading needle hole, the inside of the needle hole becomes extremely thin and the phase system becomes sharp, making it easy for thread breakage to occur. The needle thread is sharp and there are very few loops of the needle thread, but in extreme cases, the loops are not formed and the needle thread cannot be caught with the tip of the hook, which tends to cause skipped stitches, especially in zigzag stitches and decorative stitches. In cases such as this, this tendency was a major problem.

Another object of the present invention is to provide a sewing machine needle that can accurately eliminate these conventional drawbacks and has a simple structure and can be mass-produced at low cost.

The present invention provides a sewing machine needle that includes a needle tip, a needle hole, a needle trunk, and a needle handle, and is used for sewing machine work or similar work, in which thread is guided on one side of the needle trunk including the needle hole. The needle hole has a long groove and a short groove on the opposite side of the long groove, and at least the upper edge part of the needle hole extends from the bottom of the short groove to the surface part and continues with the edge of the scraped part with an arc. The needle hole is provided with a bulge inside the needle hole.

To explain with reference to the drawings, a needle tip portion 1 for piercing sewing materials, a needle trunk portion 3 having a needle hole 2 near the needle tip portion, and a needle handle portion 4 are shown.
The sewing machine needle 10 has a flat side surface 14 over its entire length.
is located in the needle handle portion 4, and a long groove 5 for thread guidance is provided on one side of the needle trunk 3 including the needle hole 2, and a short groove 6 is provided on the opposite side of the long groove 5.
It is a formality.

That is, it is formed as a vertical thread groove provided to accommodate the thread when the needle passes through the material to be sewn during sewing work.

Further, a scraped portion 7 is formed on the opposite side of the long groove 5,
The upper edge portion of the needle hole 2 toward the scraped portion 7 side is provided in the needle hole 2 as a bulging interior 8 extending from the bottom of the short groove to the surface, and is connected to the scraped portion 7 via an arc 8 □. They are connected.

That is, the needle hole 2 horizontally passes through the needle tip 1, and one end is connected to the long groove 5.
The other end reaches the short groove 6 and the scraped portion 7, and each edge is connected by a circular arc 8.

Note that the scraping portion 7 has a curved surface shape, and is formed in a position and size such that the tip of the hook (sewing machine thread thread remover) passes through the gap during the operation of catching a loop of thread. .

Further, the surface of the bulged interior 8 is raised and reaches a position at least higher than the bottom surface of the scraped portion 7, and has a horizontal surface of 8° that horizontally penetrates the inside of the needle tip portion 1. The bottom surface of the short groove 6 is essentially formed by rising above the needle hole on the side opposite to the pointed end 11 of the needle tip 1.

Figure 9 shows the curved surface of the edge of the needle hole.

The present invention provides a sewing machine needle that includes a needle tip, a needle hole, a needle trunk, and a needle handle, and is used for sewing machine work or similar work, in which thread is guided on one side of the needle trunk including the needle hole. A long groove for use in the needle, and a short groove on the opposite side of the long groove, wherein at least the upper edge of the needle hole extends from the bottom of the short groove to the surface, and is provided as a bulged interior in the needle hole. According to
The needle thread is guided into the bulge of the needle hole, making the loop larger and forming the loop more accurately.Moreover, the phase system does not become sharp, reducing thread breakage, and when the needle penetrates the fabric during sewing. Even if the fabric tends to pull down or pull up, it is easy to prevent skipped stitches, and it is possible to perform sewing such as zigzag stitches and decorative stitches with a good finish.
The structure for preventing skipped stitches is simple, easy to manufacture, and inexpensive, and has practical effects such as increasing the strength of the needle tip, reducing breakage accidents and making it safer to use.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partially enlarged vertical cross-sectional view, FIG. 2 is a cross-sectional plan view taken along line I--I in FIG. 1, and FIG. 3 is a cross-sectional view taken along line II--II in FIG. Cutaway plan view, 4th
The figure is an overall perspective view. 1... Needle tip, 2... Needle hole, 3...
...Needle trunk, 4...Needle handle, 5...
Long groove, 6...Short groove, 7...Scraped portion, 8...Bulging inside, 81...Circular arc, 8
□・・・Horizontal surface, 9・・・Curved surface, 10・
...Sewing machine needle, 11... Point end, 14.
...Flat side.

Claims (1)

[Scope of utility model registration request] 1. In a sewing machine needle used for sewing machine work or similar work, which includes a needle tip portion 1, a needle hole portion 2, a needle trunk portion 3, and a needle handle portion 4, one side of the needle trunk portion 3 including the needle hole portion 2 is provided. It has a long groove 5 for thread guide and a short groove 6 on the opposite side to the long groove 5, and at least the upper edge portion of the needle hole 2 is
A sewing machine needle characterized in that the needle hole 2 is provided as a bulging interior 8 which extends from the bottom of the short groove to the surface of the needle stem with a □ and is connected to the edge of the scraped portion 7 with an arc 8 □. 2. The sewing machine according to claim 1, wherein the needle hole part 2 is a part through which a thread is passed, horizontally passing through the needle tip part, and having a lower end having a gently curved surface. needle.