CN201546029U

CN201546029U - Thread releasing device for sewing machine

Info

Publication number: CN201546029U
Application number: CN2009202001060U
Authority: CN
Inventors: 顾飞龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-09
Filing date: 2009-11-09
Publication date: 2010-08-11
Anticipated expiration: 2019-11-09

Abstract

The utility model relates to a thread releasing device for a sewing machine. The thread releasing device is mainly characterized in that a control element is arranged on a linkage rod group of an electromagnetic driver for driving the thread releasing device; and a slotted hole is formed on the control element, and is provided with a first slot pitch for driving the thread releasing device to be in the thread releasing condition and a second slot pitch for keeping the thread releasing condition in return stroke. Therefore, the stroke of the thread releasing device is varied to be convenient for being accordingly changed and applied by adjusting and matching the stroke of a thread cutting device.

Description

The thread-loosening device of Sewing machines

Technical field

The utility model relates to a kind of thread-loosening device of Sewing machines.

Background technology

General Sewing machines structure, when Sewing machines work at the end, can impose a signal and give electromagnetic valve, allow electromagnetic valve make a stroke that is compressed to after protruding out, usually the operating bar first end pivot of this electromagnetic valve connects a thread cutting device, start interlock thread cutting device by electromagnetic valve, plastic cutter is protruded out to car pin place, and thread is colluded the cut-out of pulling, at the operating bar second end place of electromagnetic valve by the cooperation of some linkages, the thread-loosening device of Sewing machines front side can be relaxed by the synchronous suture that will be folded on the tensioning device, the suture that just can make thread cutting device will be positioned at the thread position is outwards pulled out the step that laggard row is cut off, so, just can carry out next sewing work.And the tensioning device of Sewing machines is lax, the linkage that main system utilizes electromagnetic valve operating bar second end to be connected, interlock is dialled the arm of dialling that commentaries on classics one is positioned at the Sewing machines front side, make this group arm pass [being to decide up or down] up or down, and reach synchronously thread-loosening device loose ends, the purpose of raising line on different type of machines.

As announce a kind of Sewing machines of disclosing for No. 344350 raise line, thread-loosening device [it belongs to up loose ends of driving lever], it comprises: driver's valve, contain a valve rod, the first end pivot of this valve rod connects the control link of a thread cutting device; Swing arm, its stage casing is equipped with a slotted eye, and in being placed through with a trunnion, and makes this trunnion be fixed on the fixed component, and in addition, first end that makes this swing arm is linked by the valve rod of this driver's valve, and wears a long slot bore in second end of this swing arm; Drive rod, first distal process of this drive rod is provided with a finger, and makes this finger often be placed through in the long slot bore of second end of this swing arm, and second end of this drive rod is provided with a bar hole; Connecting rod is placed through in the sewing machine body, and first end of this connecting rod is fixedly arranged in the bar hole of second end of this drive rod; And shifting component, first end of this shifting component is fixed on second rod end of this connecting rod, be provided with one at first end and stir pin near this shifting component, often be arranged in the interlock groove of the thread tension releasing slide of Sewing machines, in addition be pivoted with the interlock piece in second end near this group line component, what make that this interlock piece is connected Sewing machines raises the line slide bar.

No matter and the loose ends of above-mentioned which kind of loose ends structure is a loose ends up or down, this loose ends and tangent line are to carry out synchronously, that is to say that the stroke of thread-loosening device equals the stroke of thread cutting device, also equal the stroke of electromagnetic valve start, but the designed thread cutting device stroke of each tame dealer differs and the interlinked mechanism of interlock thread-loosening device is not quite similar, and often causes adjusting thread cutting device to cooperate thread-loosening device very loaded down with trivial details and inconvenient.

The utility model content

Technical problem to be solved in the utility model is the thread-loosening device that a kind of Sewing machines is provided at above-mentioned prior art, the thread-loosening device of this Sewing machines can change the time and the stroke of thread-loosening device start at commercially available existing Sewing machines, allow thread-loosening device departure moment form the loose ends state, backhaul can keep the effect of loose ends state.

The utility model solves the problems of the technologies described above the technical scheme that is adopted:

The thread-loosening device of this Sewing machines, it mainly is to be provided with a control piece on the trace group of electromagnetic driver drive thread-loosening device, this control piece is provided with a slotted eye, and this slotted eye keeps second slot pitch of loose ends state when having first slot pitch that allows thread-loosening device drive form the loose ends state and backhaul; By this, allow the stroke of thread-loosening device change, cooperate the stroke of thread cutting device to make corresponding change application so that can adjust.

Compared with prior art, advantage of the present utility model is:

1, the thread-loosening device of the utility model Sewing machines provides a kind of time and stroke that changes the thread-loosening device start, allows thread-loosening device departure moment stroke loose ends state, and backhaul can keep the effect of loose ends state.

2, the thread-loosening device of the utility model Sewing machines, second slot pitch of maintenance loose ends state during by first slot pitch in the control piece slotted eye and backhaul to allow the stroke change of thread-loosening device, is made change application so that can adjust the stroke of cooperation thread cutting device.

Description of drawings

Fig. 1 is the entire combination schematic diagram of the utility model embodiment one;

Fig. 2 is the cross-sectional schematic of the utility model embodiment one;

Fig. 3 is the front elevational schematic of the utility model embodiment one;

Fig. 4 is the action schematic diagram of the utility model embodiment one;

Fig. 5 is the loose ends front elevational schematic of the utility model embodiment one;

Fig. 6 is the loose ends action schematic diagram of the utility model embodiment one;

Fig. 7 is the entire combination schematic diagram of another embodiment of the utility model;

Fig. 8 is the front elevational schematic of another embodiment of the utility model;

Fig. 9 is the action schematic diagram of another embodiment of the utility model;

Figure 10 is the loose ends front elevational schematic of another embodiment of the utility model;

Figure 11 is the routine loose ends action schematic diagram of another enforcement of the utility model.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

At first, see also Fig. 1～shown in Figure 3, the entire combination of the thread-loosening device of the Sewing machines that provides for the utility model embodiment one, analyse and observe and front elevational schematic, it mainly is that first end at the operating bar 11 of electromagnetic driver 1 connects a thread cutting device 3, operating bar 11 second ends then drive the trace group 21 of thread-loosening device 2, trace group 21 is provided with a control piece 22, this control piece 22 is provided with a slotted eye 220, and this slotted eye 220 has second slot pitch 222 that allows thread-loosening device 2 drive first slot pitch 221 of formation loose ends state and keep the loose ends state.

By this, allow thread-loosening device 2 cooperate thread cutting device 3 cutting off suture, and, allow thread-loosening device 2 reply tightnesses again, make it can not be reserved with long unnecessary line tail, to reach the advantage of sewing surface aesthetic with after group line group [not shown in the figures] the gripping suture.

See also Fig. 1～shown in Figure 6, action schematic diagram for the thread-loosening device of this creation Sewing machines, this thread-loosening device is the type that down start forms loose ends, when assembling, utilize the operating bar 11 of electromagnetic driver 1 together to drive thread-loosening device 2 and thread cutting device 3, on the trace group 21 of thread-loosening device 2 in the slotted eye 220 of set control piece 22 then corresponding group establish a connecting rod 23, and allow connecting rod 23 slippage in slotted eye 220, and these connecting rod 23 correspondences affect control loose ends whether supporter 24, use supporter 24 to allow tension disk 25 unclasp; When start, this electromagnetic driver 1 together drives thread-loosening device 2 and thread cutting device 3, allow the trace group 21 in the thread-loosening device 2 be driven, make way for the connecting rod 23 of first slot pitch 221 in control piece 22 slotted eyes 220, promptly supported the cell wall of pulling by interlock together, the supporter 24 of making way for the Sewing machines front side supports the tension disk 25 of pulling, and allows tension disk 25 unclasp, and forms the loose ends state; Then, allowing connecting rod 23 press down at drive line ball bar 26 makes thread form the length of reserving.

Then, when electromagnetic driver 1 is replied, then allow connecting rod 23 reply displacement by second slot pitch 222 of slotted eye 220, at this moment, line ball bar 26 still keeps pressing down the loose ends state, then, is got back in first slot pitch 221 by second slot pitch 222 again, get back to original position up to connecting rod 23, allow thread-loosening device 2 reply and the folder suture of pulling.

See also Fig. 7～shown in Figure 11, schematic diagram for another embodiment of the thread-loosening device of the utility model Sewing machines, this thread-loosening device is the type that up start forms loose ends, it is after corresponding group is established a tumbler 27 on the control piece 22 of trace group 21, connect the direction [being that supporter 24 up makes its loose ends to the tension disk 25 of pulling] of supporting the tension disk 25 of pulling again to allow supporter 24 change with connecting rod 23.

Aforesaid embodiment or accompanying drawing and non-limiting structural style of the present utility model or size have suitable variation or the modification of knowing the knowledgeable usually in any affiliated technical field, all should be considered as not breaking away from patent category of the present utility model.

Claims

1. the thread-loosening device of a Sewing machines, it is characterized in that: on the trace group of electromagnetic driver drive thread-loosening device, a control piece is set, this control piece connects a connecting rod, and connecting rod can be controlled loose ends whether supporter, wherein: described control piece is provided with a slotted eye, has first slot pitch and second slot pitch of bending in the slotted eye.

2. the thread-loosening device of Sewing machines according to claim 1, it is characterized in that: the control piece of described trace group connects with connecting rod by a tumbler, changes the direction that supporter supports the tension disk of pulling with correspondence.