CN101469493B - Lower thread cutter of sewing machine - Google Patents
Lower thread cutter of sewing machine Download PDFInfo
- Publication number
- CN101469493B CN101469493B CN200710307368A CN200710307368A CN101469493B CN 101469493 B CN101469493 B CN 101469493B CN 200710307368 A CN200710307368 A CN 200710307368A CN 200710307368 A CN200710307368 A CN 200710307368A CN 101469493 B CN101469493 B CN 101469493B
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- thread cutter
- sewing machines
- guide member
- lower thread
- installation board
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Abstract
The invention relates to a lower line shearing device for the sewing machine, comprising a fixing board, a lower mounting board, a sliding guidance piece and a linkage arm. The fixing board is fixed onto the platform of the sewing machine, having an oblique guidance slot and a first guidance piece for assembly and accommodation of a second guidance piece and a guidance hole of the lower mounting board. The mounting board is equipped with a fixed cutting knife group and a clip group on the upper and the lower surface respectively, a third guidance piece is disposed on the lower mounting board, and correspondingly threaded on a long sliding slot on a sliding guidance sheet. The sliding guidance sheet is equipped with a wire hook rod, whose front end is clamped and limited by the fixed cutting knife group. The sliding guidance sheet is further equipped with a long hole for correspondingly accommodation of the fourth guidance piece on the linkage arm, while the linkage arm is hinged to the fixing board on the central portion thereof. Consequently, the lower line shearing group is capable of reducing the distance between the fixed cutting knife group and the suture when finishing the line shearing operation, so that the left tail on the cloth is relatively shorter after the line shearing operation completion.
Description
Technical field
The lower thread cutter of the relevant a kind of Sewing machines of the present invention.
Background technology
The lower thread cutter of existing sewing machine has a fixed head, and this fixed head is to fix with the bed platform of Sewing machines, and supplies line shearing group assembling location; This line shearing group has an installing plate; This installing plate is fixed on the fixed head, and group is established a sliding guide plate on the installing plate, and the front end of this sliding guide plate is provided with a moving cutting tool; This installing plate, sliding guide plate and moving cutting tool and a linking swing arm interlock again, and this linking swing arm is driven by electromagnetic valve and swings.Like this, when the start of solenoid-driven linking swing arm, this linking swing arm will drive the action that installing plate, sliding guide plate and moving cutting tool are done beat, moved, collude line and tangent line.
Yet; This existing lower thread cutter structure is when carrying out the trimming operation, and its linking swing arm all only drives whole lower installation board and sliding guide plate earlier and does the beat action on the angle, when linking swing arm continues by interlock; Just can sliding guide plate be released fully; And the collude line bar of interlock on it protrude out to collude the line action, because the fixed cutting tool group and the intermediate plate group of this lower thread cutter are to be fixed on the lower installation board, and this lower installation board is only done low-angle beat action in whole tangent line operation process; Therefore the whole stroke that colludes line that protrudes out that colludes the line bar is longer; Be that the fixed cutting tool group is longer to the distance of suture position, make and after cutting off suture, stay the thread end length on cloth longer relatively that this not only causes the situation of waste suture; And, increase on foot and make cost of processing for to ask the sophistication of commodity must carry out the operation of cutting out of line tail again with manual work.
Please with reference to TaiWan, China patent No. 84205229 and No. 86218218; It is the novel patent case of the relevant thread cutting device that the inventor invents, and above-mentioned two patent cases all have the aforesaid disadvantages associated such as thread end length on cloth is relatively long of after cutting off suture, staying.
Summary of the invention
The lower thread cutter that the purpose of this invention is to provide a kind of Sewing machines, it stays the thread end length on cloth to shorten relatively after cutting off suture.Be to realize above-mentioned purpose, the lower thread cutter of Sewing machines of the present invention is characterized in comprising: a fixed head, and it is fixedly arranged on the bed platform of Sewing machines, is provided with inclined guide groove in first end of fixed head, and establishes first guide member in this end; One lower installation board; The above and below of its front end is respectively equipped with fixed cutting tool group and intermediate plate group; And establish second guide member at this end, and correspondence is placed in the aforesaid inclined guide groove, establishes guide hole in the rear end of lower installation board; Supply the corresponding setting of described first guide member, and establish the 3rd guide member in a side of guide channel; One sliding guide plate, its front end are equipped with and collude the line bar, and establish an elongated hole longitudinally at the rear of colluding assembling place of line bar, and the rear of elongated hole establishes a horizontal microscler chute, supply described the 3rd guide member correspondence ccontaining; One linking swing arm, its first end is convexly equipped with the 4th guide member, and correspondence convexedly stretches in the described elongated hole, and its second end and electromagnetic valve are connected with, and are pivoted in middle and fixed head.
This time line shearing group is when carrying out the trimming operation; This linking swing arm will drive lower installation board and sliding guide plate beat and displacement simultaneously; Make fixed cutting tool group, the intermediate plate group of being located at lower installation board and be located at the action that the line bar is also done angle beat and displaced simultaneously of colluding of sliding guide plate; Linking swing arm interlock sliding guide plate displacement separately to the primary importance; Make the line bar that colludes on it protrude out and collude line action, and under the interlock of follow-up linking swing arm, suture colluded to the fixed cutting tool group at primary importance place, place, position and accomplish the trimming operation, reach to utilize and shorten this fixed cutting tool group to colluding the distance of establishing the suture place; With after accomplishing the trimming operation, the effect that left thread end length shortens relatively on cloth.
The lower thread cutter of Sewing machines of the present invention has the following advantages compared to prior art:; When carrying out the trimming operation; This fixed cutting tool group, intermediate plate group and collude the line bar and can earlier be driven beat simultaneously and be displaced to primary importance; Make it comparatively near car pin place, this colludes the line bar and is driven to the second place and after colluding line, return primary importance afterwards, and under the cooperation of fixed cutting tool group and intermediate plate group, accomplishes the action of trimming; The distance of the second place when shortening the fixed cutting tool group like this and colluding line, left thread end length shortens relatively on cloth and make after accomplishing the trimming operation.
Description of drawings
Understand the object of the invention, characteristics and advantage for more knowing, below conjunction with figs. is elaborated to preferred embodiment of the present invention, wherein:
Fig. 1 is the three-dimensional exploded view of lower thread cutter of the present invention;
Fig. 2 is that lower thread cutter of the present invention is assembled in the schematic isometric on the sewing machine platform;
Fig. 3 is the combination stereogram of lower thread cutter of the present invention;
Fig. 4 is the combination vertical view of lower thread cutter of the present invention;
Fig. 5 is the combination start vertical view () of lower thread cutter of the present invention; And
Fig. 6 is the combination start vertical view (two) of lower thread cutter of the present invention.
The specific embodiment
At first, see also shown in Figure 1ly, it is the three-dimensional exploded view of the lower thread cutter of Sewing machines of the present invention.
The lower thread cutter of Sewing machines of the present invention comprises a fixed head 1, a lower installation board 2, a sliding guide plate 3 and a linking swing arm 4; Wherein (the following Fig. 2 that please consults in the lump):
This fixed head 1; Be a reservation shape and be fixedly arranged on the bed platform 51 of Sewing machines 5, be provided with inclined guide groove 12, be provided with the restrictions 13 that protrudes into inclined guide groove 12 notch peripheries at the periphery of this inclined guide groove 12 in first end of fixed head 1 through bolt 11; And establish screw 14 in a side of this end; The confession group is established first guide member 15, establishes sheathed post 16 in the side of screw 14 again, supplies an end of extension spring 17 sheathed fixing;
This lower installation board 2; The above and below of its front end is respectively equipped with fixed cutting tool group 21 and intermediate plate group 22; And establish second guide member 23 in inclined guide groove 12 parts of the corresponding fixed head 1 of this end, the fixing guide plate 24 of a side in the rear end of lower installation board 2 in addition, and establish guide hole 25 at the opposite side of guide plate 24 relatively; Supply first guide member, 15 corresponding settings the on the fixed head 1; And between guide plate 24 and guide hole 25, be provided with the 3rd guide member 26, have the block edge 27 of an epirelief again in ora terminalis place, the rear end of this lower installation board 2, in addition the other end of the fixing said extension spring 17 in ora terminalis place below lower installation board 2;
This sliding guide plate 3; Its front end is equipped with and colludes line bar 31; And establish an elongated hole 32 longitudinally at the rear of colluding 31 assemblings place of line bar; And a horizontal microscler chute 33 is established at the rear of elongated hole 32, and this microscler chute 33 is to supply the 3rd guide member 26 on the lower installation board 2 corresponding ccontaining, and the lower periphery of sliding guide plate 3 is resisted against the upper peripheral edge of the guide plate 24 of lower installation board 2;
This linking swing arm 4; Its first end is convexly equipped with the 4th guide member 41; And corresponding establishing in the elongated hole 32 that convexedly stretches in sliding guide plate 3; Second end and the electromagnetic valve (not shown) of linking swing arm 4 are connected with, and drive this linking swing arm 4 through electromagnetic valve, are pivoted mutually with fixed head 1 in the middle paragraph place of linking swing arm 4 in addition.
During assembling (please and referring to Fig. 2 to Fig. 4); Be earlier this linking swing arm 4 to be hubbed on the fixed head 1; Again this lower installation board 2 is placed on the linking swing arm 4; And this first guide member 15 is passed the back correspondence be locked in the screw 14 of fixed head 1 from guide hole 25 places of lower installation board 2, be placed in the inclined guide groove 12 of fixed head 1, and by the restrictions that stretches into inclined guide groove 12 13 restriction blocks and second guide member 23 on the lower installation board 2 is just corresponding; To avoid second guide member 23 to break away from this inclined guide groove 12; And an end of extension spring 17 is sheathed on the sheathed post 16 on the fixed head 1, its in addition end then be fixed in the ora terminalis place, below of lower installation board 2, make this lower installation board 2 remain an active force toward the displacement of fixed head 1 the place ahead; Continue this sliding guide plate 3 is placed on the lower installation board 2; And microscler chute 33 backs that make the 3rd guide member 26 pass on the sliding guide plate 3 set firmly with lower installation board 2; And the 4th guide member 41 that is arranged on linking swing arm 4 first ends is elongated holes 32 that correspondence is placed through sliding guide plate 3; Simultaneously the lower end periphery of sliding guide plate 3 will with guide plate 24 corresponding the reclining of lower installation board 2, and it colludes line bar 31 and in the fixed cutting tool group 21 of lower installation board 2, passes.
When this lower thread cutter desires to carry out the trimming action (seeing also Fig. 4 to Fig. 6); This linking swing arm 4 will receive the driving of electromagnetic valve and articulate part with itself and fixed head 1 is that fulcrum is made first end wobbling action forward; Because the 4th guide member 41 on these linking swing arm 4 first ends is to be arranged in the elongated hole 32 of sliding guide plate 3; And the fixed cutting tool group 21 on the lower installation board 2 is colluded line bar 31 because of what establish sliding guide plate 3 with appropriate clamping force folder; Simultaneously between fixed head 1 and the lower installation board 2 and be provided with an extension spring 17; Make this lower installation board 2 remain an active force toward the displacement of fixed head 1 the place ahead; Make the block edge 27 of lower installation board 2 push sliding guide plate 3, add first guide member 15 of the guide hole 25 that stretches into lower installation board 2, and second guide member 23 of lower installation board 2 is placed in the inclined guide groove 12 of fixed head 1 and receives inclined guide groove 12 to set up the guiding of direction to cooperate down; Interlock sliding guide plate 3 and lower installation board 2 make it oblique beat displacement forward simultaneously to make operating state that these linking swing arm 4 first ends swing forward; Arrive the rear end of guide holes 25 and the front end place that second guide member 23 arrives inclined guide grooves 12 until first guide member 15, this lower installation board 2 will be limited in relatively on the fixed head 1 and can't be continued displacement again, this moment this fixed cutting tool group 21 and collude line bar 31 and be positioned at the primary importance (as shown in Figure 5) that the line action is colluded in preparation; When wobbling action is done in first end continuation of linking swing arm 4 forward; To directly drive sliding guide plate 3 separately; Because the root edge of this sliding guide plate 3 receives guide plate 24 guiding that limits, be embedded under the cooperation guiding in the microscler chute 33 at the 3rd guide member 26 simultaneously, drive this sliding guide plate 3 toward anterior displacement; And make it collude line bar 31 like this protruding out fixed cutting tool group 21 to the second place of colluding the line operation, hold suture 6 to prepare to collude.
After the line action is colluded in completion; This electromagnetic valve just begins to return original position and this linking swing arm 4 of interlock; Make this linking swing arm 4 retract sliding guide plate 3 through the 4th guide member 41, order is colluded line bar 31 and is got back to primary importance and matching and fixing cutting knife group 21 and do the trimming action, utilizes the relation of the 3rd guide member 26 and microscler chute 33 afterwards again; Follow the direction of setting up of inclined guide groove 12 and guide hole 25 to carry out the beat displacement together with sliding guide plate 3 this lower installation board 2, to get back to the home position.
Via above enforcement explanation; But the lower thread cutter of knowledge capital invention is because of after can establishing lower installation board and tool that this tool is provided with the fixed cutting tool group sliding guide plate that colludes the line bar and do beat simultaneously and be displaced to primary importance; Make sliding guide plate be displaced to again separately and supply to collude the second place that the line bar colludes line; So as to shortening the distance between the primary importance and the second place, and accomplish to continue after colluding the line action and get back to primary importance colluding the line bar, with this collude the suture got under the cooperation of fixed cutting tool group with its cut-out; And reach the distance that the thread end length of staying the suture on the cloth is relative primary importance to the second place, therefore thread end length can be shortened relatively.
Claims (8)
1. the lower thread cutter of a Sewing machines is characterized in that comprising:
One fixed head, it is fixedly arranged on the bed platform of Sewing machines, is provided with inclined guide groove in first end of fixed head, and establishes first guide member in this end;
One lower installation board; The above and below of its front end is respectively equipped with fixed cutting tool group and intermediate plate group; And establish second guide member at this end, and correspondence is placed in the aforesaid inclined guide groove, establishes guide hole in the rear end of lower installation board; Supply the corresponding setting of described first guide member, and establish the 3rd guide member in a side of guide channel;
One sliding guide plate, its front end are equipped with and collude the line bar, and establish an elongated hole longitudinally at the rear of colluding assembling place of line bar, and the rear of elongated hole establishes a horizontal microscler chute, supply described the 3rd guide member correspondence ccontaining;
One linking swing arm, its first end is convexly equipped with the 4th guide member, and correspondence convexedly stretches in the described elongated hole, and its second end and electromagnetic valve are connected with, and are pivoted in middle and fixed head.
2. the lower thread cutter of Sewing machines according to claim 1 is characterized in that, the periphery of this inclined guide groove is provided with the restrictions that protrudes into inclined guide groove notch periphery, and this second guide member of retaining system.
3. the lower thread cutter of Sewing machines according to claim 1 is characterized in that, this fixed head is provided with screw, supplies the corresponding spiral shell of first guide member to establish fixing.
4. the lower thread cutter of Sewing machines according to claim 1 is characterized in that, between fixed head and lower installation board, is provided with extension spring.
5. the lower thread cutter of Sewing machines according to claim 4 is characterized in that, fixed head is provided with sheathed post, supplies an end of extension spring sheathed fixing.
6. the lower thread cutter of Sewing machines according to claim 1 is characterized in that, rear end one side of lower installation board is fixed a guide plate, supplies and the sliding guide plate guiding that offsets.
7. the lower thread cutter of Sewing machines according to claim 6 is characterized in that, guide plate is located at the opposite side of relative guide hole, and its upper limb also supports the lower edge that is affixed on sliding guide plate.
8. the lower thread cutter of Sewing machines according to claim 1 is characterized in that, the ora terminalis place, rear end of this lower installation board has the block edge of an epirelief.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710307368A CN101469493B (en) | 2007-12-28 | 2007-12-28 | Lower thread cutter of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710307368A CN101469493B (en) | 2007-12-28 | 2007-12-28 | Lower thread cutter of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101469493A CN101469493A (en) | 2009-07-01 |
| CN101469493B true CN101469493B (en) | 2012-10-17 |
Family
ID=40827278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710307368A Expired - Fee Related CN101469493B (en) | 2007-12-28 | 2007-12-28 | Lower thread cutter of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101469493B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797121A (en) * | 2012-08-24 | 2012-11-28 | 新杰克缝纫机股份有限公司 | Line shearing tool for two-needle sewing machine |
| CN104894764B (en) * | 2014-03-03 | 2017-06-23 | 启翔股份有限公司 | Thread cutting mechanism under sewing machine |
| CN113579116B (en) * | 2021-07-28 | 2023-05-16 | 威海新光电碳制品有限公司 | Multifunctional press wire cutting mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100482A (en) * | 1993-09-18 | 1995-03-22 | 高林股份有限公司 | Thread-cutting apparatus for multi-needle sewing machine |
| CN2234963Y (en) * | 1995-04-08 | 1996-09-11 | 顾飞龙 | Thread-cutter for chain-shaped sewing method sewing machine |
| CN1218858A (en) * | 1997-11-27 | 1999-06-09 | 顾飞龙 | Thread cutter of sewing machine by chain type stitch |
| US6694903B1 (en) * | 2002-12-16 | 2004-02-24 | Ching Chi Machine Co., Ltd. | Knife track adjustment structure of thread cutter of sewing machine |
| CN201158747Y (en) * | 2007-12-28 | 2008-12-03 | 顾飞龙 | Lower thread cutter of sewing machine |
-
2007
- 2007-12-28 CN CN200710307368A patent/CN101469493B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100482A (en) * | 1993-09-18 | 1995-03-22 | 高林股份有限公司 | Thread-cutting apparatus for multi-needle sewing machine |
| CN2234963Y (en) * | 1995-04-08 | 1996-09-11 | 顾飞龙 | Thread-cutter for chain-shaped sewing method sewing machine |
| CN1218858A (en) * | 1997-11-27 | 1999-06-09 | 顾飞龙 | Thread cutter of sewing machine by chain type stitch |
| US6694903B1 (en) * | 2002-12-16 | 2004-02-24 | Ching Chi Machine Co., Ltd. | Knife track adjustment structure of thread cutter of sewing machine |
| CN201158747Y (en) * | 2007-12-28 | 2008-12-03 | 顾飞龙 | Lower thread cutter of sewing machine |
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| Publication number | Publication date |
|---|---|
| CN101469493A (en) | 2009-07-01 |
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Granted publication date: 20121017 Termination date: 20171228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |