Sewing machine

Patent metadata

Field	Value
Publication number	US-12540429-B2
Application number	US-202318522103-A
Country	US
Kind code	B2
Filing date	Nov 28, 2023
Priority date	Nov 29, 2022
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

A sewing machine that suppresses sewing defects is provided. The sewing machine includes: a sewing needle, held by a needle bar and moving back and forth while holding an upper thread; a shuttle, configured to hold a bobbin around which a lower thread is wound and which is housed in a bobbin case, and cooperating with the sewing needle to form a seam; a presser foot member, configured to press a to-be-sewn article at a sewing position directly below the sewing needle; a feeding mechanism, feeding the to-be-sewn article from the sewing position to a first direction; a needle drive portion, provided separately from a belt drive portion to synchronously move the sewing needle and the presser foot component in the first direction; and a control portion, which controls so that the needle drive portion and the belt drive portion operate independently.

First claim

What is claimed is:

1 . A sewing machine, comprising:
a sewing needle, held by a needle bar, and moving back and forth while holding an upper thread; a shuttle, configured to hold a bobbin around which a lower thread is wound and which is housed in a bobbin case, and cooperating with the sewing needle to form a seam; a presser foot member, configured to press a to-be-sewn article at a sewing position directly below the sewing needle; a feeding mechanism, feeding the to-be-sewn article from the sewing position to a first direction; a needle hole guide mechanism, comprising:
a needle hole guide member, provided directly below the sewing needle, supporting a lower surface of the to-be-sewn article, and comprising a needle hole through which the sewing needle passes in a vertical direction, and being movable in the vertical direction; and
a guide drive portion, driving the needle hole guide member to move independently in the vertical direction; and
a control portion, configured to control the guide drive portion to make the needle hole guide member move up and down independently of a reciprocating movement of the sewing needle; wherein the sewing machine further comprises: a throat plate, provided around the needle hole guide member, and supporting the lower surface of the to-be-sewn article, wherein the control portion controls the guide drive portion so that when the sewing needle pierces the to-be-sewn article for a first time, the needle hole guide member is located at a raised position where an upper surface of the needle hole guide member is flush with an upper surface of the throat plate.

2 . The sewing machine of claim 1 , wherein
the control portion controls the guide drive portion so that when the sewing needle pierces the to-be-sewn article for a second time or later, the needle hole guide member is located at a lowered position where the needle hole guide member is below the upper surface of the throat plate.

3 . The sewing machine of claim 1 , wherein
the control portion controls the guide drive portion so that when the sewing needle pierces the to-be-sewn article for a second time or later, the needle hole guide member is located at the raised position where the upper surface of the needle hole guide member is flush with the upper surface of the throat plate, and when the sewing needle is pulled out from the to-be-sewn article, the needle hole guide member is located at a lowered position where the needle hole guide member is below the upper surface of the throat plate.

4 . The sewing machine of claim 1 , wherein
the feeding mechanism comprises: feeding belts, provided on two sides in a second direction orthogonal to the first direction with respect to the sewing position; and a belt drive portion, independently driving the feeding belts on one side of the second direction with respect to the sewing position and the feeding belts on another side of the second direction with respect to the sewing position.

Assignees

• Juki Kk

Inventors

• Sato Kuniaki
• Ogawa Tatsuya
• Nomoto Yukiyo
• Nakayama Hajime
• Higa Takahiro

Classifications

• D05B69/12

  using rotary electric motors · CPC title

• D05B57/10

  Shuttles · CPC title

• D05B29/00

  Pressers; Presser feet (for feeding D05B27/04) · CPC title

• D05B27/10

  with rotary circular feed members · CPC title

• D05B1/08

  for making multi-thread seams · CPC title