WO2006070972A1 - Dispositif d'alimentation d'un fil de dessous de machine a coudre - Google Patents

Dispositif d'alimentation d'un fil de dessous de machine a coudre Download PDF

Info

Publication number
WO2006070972A1
WO2006070972A1 PCT/KR2005/001088 KR2005001088W WO2006070972A1 WO 2006070972 A1 WO2006070972 A1 WO 2006070972A1 KR 2005001088 W KR2005001088 W KR 2005001088W WO 2006070972 A1 WO2006070972 A1 WO 2006070972A1
Authority
WO
WIPO (PCT)
Prior art keywords
under thread
bobbin case
case body
latch
thread guide
Prior art date
Application number
PCT/KR2005/001088
Other languages
English (en)
Inventor
Sang Cheol Lee
Original Assignee
Kobest Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kobest Co., Ltd. filed Critical Kobest Co., Ltd.
Publication of WO2006070972A1 publication Critical patent/WO2006070972A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/26—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices

Definitions

  • the present invention relates to a under thread supply device of a sewing machine, in which a position of withdrawing under thread can be fixedly and stably maintained, thereby improving the sewing quality and workability and, at the same time, reducing the number of components and fabricating processes so that a fabricating cost can be reduced.
  • a under thread supply device for supplying the lower thread.
  • the under thread supply device comprises a hook body 120 disposed at a driving shaft 110 which is rotatably connected to a driving apparatus, a bobbin case BC accommodated in the hook body 120 and a bobbin 140 on which the under thread is wound.
  • the bobbin case BC comprises a bobbin case base 130 accommodated in the hook body 120 and a bobbin case body 50 for receiving the bobbin 140 from an outside of the bobbin 140.
  • a stud 131 At a bottom of the bobbin case base 130, there is upright disposed a stud 131.
  • the bobbin 40 is rotatably disposed at the stud 131.
  • a latch 151 At the bobbin case body 150, there is formed a latch 151 for holding the 140 when being engaged with or released from the stud 131 formed in the bobbin case base 130.
  • the hook body 20 is rotated by rotation of the driving shaft 110.
  • the under thread is released from the bobbin while hooking upper thread and forming a loop for enclosing the bobbin case BC, and withdrawn through a under thread withdrawing opening 154. Then, the under thread is hooked up by a loop of the upper thread, thereby performing the sewing operation.
  • the upper thread can have to smoothly hook up the under thread, and the tension of the hooked under thread has to be balanced with that of the upper thread. If a position of withdrawing the under thread is deviated from a preset position, it is difficult that the loop of the upper thread hooks up the under thread. Therefore, the thread is broken or the thread is dangled down and fluttered roughly, thereby obstructing the sewing operation.
  • a coil spring-shaped guide coil 155 is fixedly provided at the bobbin case body 150 in a direction that a needle comes down, so that the under thread is passed through the guide coil 155, thereby fixing the position of withdrawing the under thread.
  • peaks in the form of pincers are disposed at a body of the sewing machine, and comes down at both sides of the guide coil 155 by an action of a lever.
  • the guide coil 155 since one thin end of the guide coil 155 as a separate member is welded to the bobbin case body 150, the welded portion between the guide coil 155 and the bobbin case body 150 is very weak. Further, the guide coil 155 has to be positioned at a center portion of the peaks so as to prevent interference with the peaks. However, due to the deformation of the guide coil 155, the guide coil 155 is collided with the peaks due to the deformation of the guide coil 155, so that the guide coil is often cut away.
  • the guide coil 155 has to be placed at an exact position of the bobbin case body.
  • a separate member is welded thereto, there are also some problems that the number of components is increased, and at the same time, a welding operation required to pay close attention is accompanied, thereby increasing a fabricating cost.
  • an object of the present invention is to provide a under thread supply device of a sewing machine, in which deformation of a under thread guide provided at a latch of a bobbin case body is prevented, so that a position of withdrawing under thread can be fixedly and stably maintained, thereby improving sewing quality and workability and, at the same time, reducing the number of components and fabricating processes so that a fabricating cost can be reduced.
  • a under thread supply device of a sewing machine comprising a bobbin case body 50 provided with a latch 51, is characterized in that the latch 51 of the bobbin case body 50 is integrally formed with a under thread guide 15a at a side thereof.
  • FIG. 1 is an exploded perspective view of a part of a conventional under thread supply device of a sewing machine.
  • FIG. 2 is an exploded perspective view of a part of a under thread supply device of a sewing machine according to the present invention.
  • FIG. 2 is an exploded perspective view of a part of a under thread supply device of a sewing machine according to an embodiment of the present invention.
  • a under thread supply device of a sewing machine comprises a hook body 20 disposed at a driving shaft 10; a bobbin case base 30 having a stud 31 and accommodated in the hook body 20; a bobbin case body 50 receiving a bobbin 40 at an outside of the bobbin and having a latch 51 for holding the bobbin when the bobbin is mounted onto or separated from the stud 31 ; and a bobbin 40 disposed in the bobbin case 30 and 50.
  • the latch 51 of the bobbin case body 50 is integrally formed with a under thread guide 51a at one side thereof.
  • the under thread guide 5 Ia of the latch 51 is protruded in a direction that a needle comes down.
  • the under thread guide 51a is formed into a link-shaped plate having a curved admission passage 51aa.
  • the bobbin case body 50 is formed with a groove 55 formed in the latch 51 so as to receive the under thread guide 51a.
  • the under thread guide 51a is bent to an inside so as not to deviate from an outer line of the bobbin case body 50, so that the under thread guide 51a is not interfered with the driving of the bobbin case body.
  • the under thread guide 51a may have various shapes.
  • the under thread guide 51a is integrally formed at the latch 51 so as to be prevent the deformation of the under thread guide 51a. Therefore, the under thread can be always withdrawn at a fixed portion so that the upper thread can facilely hooks up the under thread. Thus, the tension balance between the upper thread and the under thread can be stably maintained, thereby improving the quality of embroidery sewing operation and fa- cilitating the sewing operation.
  • under thread guide 51a is integrally formed at the latch 51, it is prevented that under thread guide 51a is deformed. Further, since shaking is not occurred at the bobbin case body 50, there is no need of apprehension that the under thread guide 51a is damaged or cut away. Furthermore, since the position of the under thread guide 51a is deviated from that of the peaks, there is no need of apprehension of colliding with the peaks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

L'invention concerne un dispositif d'alimentation d'un fil de dessous de machine à coudre, qui comporte un corps de boîte à cannette 50 possédant un clapet 51, caractérisé en ce que le clapet 51 du corps de boîte à cannette 50 est intégralement formé avec un guide de fil de dessous 15a sur le côté de celui-ci. Dans le dispositif selon la revendication 1 ci-décrit, le guide de fil de dessous 51a du clapet 51 fait saillie dans une direction où descend une aiguille, et le guide de fil de dessous 51a est formé dans une plaque en forme de maillon possédant un passage d'entrée recourbé 51aa. Dans le dispositif de l'invention selon la revendication 1 ou 2 ci-décrit, le corps de boîte à cannette 50 est formé avec une gorge 55 située dans le clapet 51 de façon à recevoir le guide de fil de dessous 51a, et le guide de fil de dessous 51a est recourbé vers l'intérieur de façon à ne pas dévier d'une ligne extérieure du corps de boîte à cannette 50.
PCT/KR2005/001088 2004-12-28 2005-04-15 Dispositif d'alimentation d'un fil de dessous de machine a coudre WO2006070972A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20-2004-0036982 2004-12-28
KR20040036982U KR200378959Y1 (ko) 2004-12-28 2004-12-28 재봉틀 밑실 공급장치

Publications (1)

Publication Number Publication Date
WO2006070972A1 true WO2006070972A1 (fr) 2006-07-06

Family

ID=36615067

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/001088 WO2006070972A1 (fr) 2004-12-28 2005-04-15 Dispositif d'alimentation d'un fil de dessous de machine a coudre

Country Status (3)

Country Link
KR (1) KR200378959Y1 (fr)
CN (1) CN1796635A (fr)
WO (1) WO2006070972A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113337971A (zh) * 2021-06-30 2021-09-03 广东海帝隽绣东方实业股份有限公司 自动绣花用底线机及其使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102108608A (zh) * 2011-04-06 2011-06-29 张家港伸兴机电有限公司 缝纫机梭壳
CN103074742A (zh) * 2013-01-04 2013-05-01 浙江大发灯具有限公司 一种缝纫机梭壳毛坯

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200339538Y1 (ko) * 2003-10-29 2004-01-24 코베스트 주식회사 재봉틀의 자수용 회전북 장치

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200339538Y1 (ko) * 2003-10-29 2004-01-24 코베스트 주식회사 재봉틀의 자수용 회전북 장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113337971A (zh) * 2021-06-30 2021-09-03 广东海帝隽绣东方实业股份有限公司 自动绣花用底线机及其使用方法

Also Published As

Publication number Publication date
CN1796635A (zh) 2006-07-05
KR200378959Y1 (ko) 2005-03-17

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