JPS60858Y2 - Sewing machine thread adjustment mechanism - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a thread feed adjustment mechanism for a sewing machine.

Conventionally, the sewing thread of a sewing machine is passed directly through a needle from a spool built into the sewing machine body, and the thread is pulled out from the spool as the needle moves up and down.

However, with conventional devices like this, even when the needle stops moving up and down, the rotating shaft of the bobbin winder continues to release thread due to inertia, so the thread that has been released is unrolled before the needle moves up and down again. This had the disadvantage that it took time and effort to rewind the film.

An object of the present invention is to provide a thread draw-out adjustment mechanism for a sewing machine that can prevent unnecessary discharge of thread from the spool and draw out the necessary amount of thread according to the operation of the needle.

That is, in the thread draw-out adjustment mechanism of the sewing machine according to the present invention, a thin rubber film held by a support plate is placed between the bobbin spool and the needle, and the thread is adjusted by passing the thread through the thin rubber film. The drawer is configured to adjust the drawer.

This will be explained below based on the illustrated embodiments.

In the illustrated embodiment, a rubber thin film 3 sandwiched between a pair of support plates 2, 2 is disposed in a sewing machine main body (not shown) containing a thread spool 1, and a thread 4 is passed through the rubber thin film 3 to a sewing needle 5. It is connected to

Further, the pair of support plates 2, 2 are respectively formed with dog-sized through holes 2a, 2a in their centers.

The rubber thin film 3 is preferably disposed within the sewing machine main body and close to a portion of a replacement cover for a thread winder or the like.

Further, the support plate 2.2 that holds the rubber thin film 3 may be formed integrally with the sewing machine body so that the rubber thin film 3 can be replaced, or it may be formed as an independent member and the rubber thin film 3 may be replaced. It may be constructed so that it can be replaced as a unit.

Further, it is preferable to attach a metal plate 6 with a non-through hole 6a formed in the center to the outer surface of one of the pair of support plates 2,2.

This is to prevent the rubber thin film 3 from cracking due to the movement of the thread 4 up and down and left and right.

The tip of the sewing thread 4 is connected to the sewing needle 5 after passing through the through hole 6a of the metal plate 6 and the rubber thin film 3 using an appropriate needle.

In the thread feed adjustment mechanism of the sewing machine configured in this way, the thread 4
Since the movement of the sewing needle 5 is regulated by frictional resistance with the rubber thin film 3, when the vertical movement of the sewing needle 5 stops, the bobbin winder does not rotate due to inertia and the thread is not unnecessarily discharged, so that sewing can be restarted. This can be done extremely smoothly.

As described above, with the thread draw-out adjustment mechanism of the sewing machine according to the present invention, it is possible to accurately pull out the necessary amount of thread in accordance with the vertical movement of the sewing needle.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a thread draw-out adjustment mechanism of a sewing machine according to the present invention, and FIG. 2 is an enlarged exploded view of the main parts thereof. 1...pin spool, 2...support plate, 3...
...Rubber thin film, 4...Thread, 5...
・Needle, 6...Metal plate.

Claims (1)

[Scope of utility model registration request] A thin rubber membrane held between a pair of support plates having a through hole in the center is arranged between the spool and the needle, and the thread wound around the spool passes through this thin rubber membrane and reaches the needle. The sewing machine's thread output adjustment mechanism is a feature.