CN101624759B

CN101624759B - Computer sewing machine capable of controlling thread end length

Info

Publication number: CN101624759B
Application number: CN200910163046A
Authority: CN
Inventors: 张章生
Original assignee: 张章生
Current assignee: Sichuan Zhongfeng Heavy Industry Co.,Ltd.
Priority date: 2009-08-21
Filing date: 2009-08-21
Publication date: 2012-09-26
Anticipated expiration: 2029-08-21
Also published as: CN101624759A

Abstract

The invention discloses a computer sewing machine capable of controlling a thread end length, comprising a machine head, a needle rod, a machine needle and a thread end controller. The thread end controller comprises an attraction magnet, a coil, a spring, an iron core and a fixed bolt, wherein the coil is arranged in the attraction magnet, a step shaft is arranged in the center of the left end surface of the iron core; the coil penetrates through the large-diameter part of the step shaft on the iron core; the spring penetrates through the small-diameter part of the step shaft on the iron core; and the fixed bolt penetrates through a through hole on the iron core and is fixed with the attraction magnet which is fixed on the machine head and is arranged between a threading hook and a threading ring. When the machine needle of the computer sewing machine runs downwards, the iron core and the attraction magnet are attracted to clamp a sewing thread while the machine needle continues to run downwards, the thread end of the sewing thread, which is remained on the machine needle, is shortened; and when the machine needle runs downwards and is inserted into fabric before running upwards, a coil power supply of the thread end controller is switched off to loosen the sewing thread so that the sewing machine normally works and effectively controls the thread end length.

Description

The computer controlled sewing machine of controlled controlling thread end length

Technical field

The present invention relates to a kind of sewing device, particularly relate to a kind of computer controlled sewing machine of controlled controlling thread end length.

Background technology

Traditional computer controlled sewing machine is stayed on the eedle approximately 3-5cm accomplishing sewing back the end of a thread, and thread take-up tension lever rose to a high position when played seam next time, reached under the eedle in the material and stayed the material back side to the end of a thread of 3-5cm.Exist following shortcoming this moment: 1, the end of a thread stays oversize quality and the aesthetics that influences sewing piece.2, the end of a thread is long can the card line or belt go out the oil in the rotating shuttle groove, contaminated material.

Summary of the invention

Technical problem to be solved by this invention is that the influence of the end of a thread remaining on the settlement computer sewing machine needle is attractive in appearance and take oil and the problem of contaminated material in the rotating shuttle groove out of.

In order to solve the problems of the technologies described above; The technical scheme that the present invention adopted provides a kind of computer controlled sewing machine of controlled controlling thread end length, comprises head, is installed in shank and eedle and the end of a thread controller on the head successively, and head is provided with wire-threading device, tension disk, alignment hook, the spudger that is used to install sewing thread and crosses the line hook; Shank was provided with coil; Said the end of a thread controller comprises gravitation iron, coil, spring, iron core and set bolt, and gravitation iron is the cylindric of right-end openings, and coil places in the gravitation iron; Center on the iron core left side is provided with a step axle; Coil is installed on iron core and tops bar on spool major diameter part, and spring is installed on iron core and tops bar on the small diameter portion of axle, and the left part of set bolt is an external screw thread; It between external screw thread on the set bolt and the nut optical axis; Iron core is provided with through hole, and through hole and the two ends of gravitation ferropexy and spring that set bolt passes on the iron core offset with the step surface of iron core step axle and the diapire of gravitation iron respectively, and the gravitation ferropexy is on the head and crossing the line hook and cross between the coil.

In the such scheme, convex with suture baffle plate up and down on iron core and the gravitation iron opposing end faces, the distance of said suture baffle plate to core center up and down is greater than the external diameter of gravitation iron.

The present invention, when computer controlled sewing machine plays the seam eedle when descending, computer is connected the coil power in the end of a thread controller, and iron core clamps sewing thread with the adhesive of gravitation iron, and this moment, eedle continued descendingly, and the end of a thread that sewing thread is stayed on the eedle has just drawn weak point.When up, the end of a thread controller coil power breaks off and unclamps sewing thread, makes the computer controlled sewing machine operate as normal, has controlled the length of the end of a thread effectively behind the descending insertion material of eedle.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the end of a thread controller decomposition texture sketch map.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is made detailed explanation.

Like Fig. 1, shown in Figure 2; The present invention includes head 10, shank 18, eedle 20 and the end of a thread controller 17; Shank 18 is installed on the head 10 with eedle 20 successively; Head 10 is provided with wire-threading device 12, tension disk 13, alignment hook 16, spudger 14, the mistake line hook 15 that is used to install sewing thread, and shank 18 was provided with coil 19, and the end of a thread controller 17 is fixed on the head and is crossing the line hook and crossing between the coil.As shown in Figure 2; The end of a thread controller comprises gravitation iron 5, coil 4, spring 3, iron core 1 and set bolt 2, and gravitation iron 5 is the cylindric of right-end openings, and the endoporus of the profile of coil 4 and gravitation iron 5 is suitable; Center on iron core 1 left side is provided with a step axle; Coil 4 is provided with vertically with iron core 1 large-diameter portion of topping bar and divides suitable through hole, and spring 3 is installed on iron core 1 and tops bar on the small diameter portion of axle, and the left part of set bolt 2 is an external screw thread; It between screw thread on the set bolt 2 and the nut optical axis; Iron core 1 is provided with through hole, and through hole and gravitation iron 5 that set bolt 2 passes on the iron core 1 are fixing, and this moment, the two ends of spring 3 offseted with the step surface of iron core 1 step axle and the diapire of gravitation iron 5 respectively.Gravitation iron 5 is fixed on the head and is crossing line hook 15 and crossing between the coil 19.Convex with suture baffle plate up and down on iron core 1 and gravitation iron 5 opposing end faces, the distance of suture baffle plate to core center can not produce interference greater than the external diameter of gravitation iron 5 during with

assurance iron core

1 and 5 adhesives of gravitation iron up and down.

As shown in Figure 1; Suture 11 passed wire-threading device 12, tension disk 13, alignment hook 16, spudger 14 successively, crosses line hook 15 entering the end of a thread controllers 17 when the present invention used; Be through on the eedle 10 through crossing coil 19 after passing from the end of a thread controller 17; When computer controlled sewing machine plays the seam eedle when descending, system connects the power supply of coil in the end of a thread controller, and the optical axis direction of iron core 1 on the attraction lower edge of coil magnetic force set bolt 2 moves left with 5 adhesives of gravitation iron suture is clamped; Eedle continues descending, and the end of a thread that suture is stayed on the eedle is drawn weak point.In the descending insertion material of eedle 21 backs when up, system's striping head controller power supply, the end of a thread controller 17 unclamps suture under the effect of spring 3.Press same mode periodic duty when play seam next time.The present invention is applied on the computer controlled sewing machine of computer control; Its main shaft is provided with encoder (sensor); Computerized control system is through the location status of sensor senses main shaft and eedle; And send the controller work of commands for controlling the end of a thread or stop by the program that configures, the operator can regulate desirable the end of a thread length through control panel in the good scope of program setting.

The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of under enlightenment of the present invention, making, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.

Claims

1. the computer controlled sewing machine of controlled controlling thread end length comprises head and is installed in shank and the eedle on the head successively, and head is provided with wire-threading device, tension disk, alignment hook, the spudger that is used to install sewing thread and crosses the line hook; Shank was provided with coil, it is characterized in that also comprising the end of a thread controller, and said the end of a thread controller comprises gravitation iron, coil, spring, iron core and set bolt; Gravitation iron is the cylindric of right-end openings; Coil places in the gravitation iron, and the center on the iron core left side is provided with a step axle, and coil is installed on iron core and tops bar on spool major diameter part; Spring be installed on iron core top bar the axle small diameter portion on; The left part of set bolt is an external screw thread, is optical axis between external screw thread on the set bolt and the nut, and iron core is provided with through hole; Through hole and the two ends of gravitation ferropexy and spring that set bolt passes on the iron core offset with the step surface of iron core step axle and the diapire of gravitation iron respectively, and the gravitation ferropexy is on the head and crossing the line hook and cross between the coil.

2. the computer controlled sewing machine of controlled controlling thread end length as claimed in claim 1 is characterized in that convexing with on iron core and the gravitation iron opposing end faces suture baffle plate up and down, and the distance of said suture baffle plate to core center up and down is greater than the external diameter of gravitation iron.