CN106637733B - Sewing machine - Google Patents
Sewing machine Download PDFInfo
- Publication number
- CN106637733B CN106637733B CN201611210590.6A CN201611210590A CN106637733B CN 106637733 B CN106637733 B CN 106637733B CN 201611210590 A CN201611210590 A CN 201611210590A CN 106637733 B CN106637733 B CN 106637733B
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- Prior art keywords
- connecting rod
- driver
- sewing machine
- sewing
- movable part
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Classifications
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
- D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/10—Electrical or electromagnetic drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention belongs to the technical field of sewing equipment, and relates to a sewing machine. The device comprises a first driver and a first connecting rod, wherein the first connecting rod is rotatably connected to a bottom plate of a machine shell, one end of the first connecting rod is connected with a movable part of the first driver, the other end of the first connecting rod is connected with a movable part of a second driver, the movable part of the second driver is also connected with a second connecting rod, the second connecting rod is driven by the first driver to rotate, so that the other end of the second connecting rod can drive the second connecting rod to move to realize adjustment to a corresponding needle pitch tight seam, and the action of the first driver is controlled by a. The invention can solve the problems that the thread end is not beautiful after being cut and the thread end is overlong after being cut in the prior art, and can adjust the stitch length during sewing through a mechanical structure. A small section of close sewing or variable-stitch-length sewing is carried out before thread trimming, so that the thread end after thread trimming is shortened, the remained thread end is firmly connected and is not easy to fall off after being pulled, the sewing effect is improved, and the attractiveness is increased.
Description
Technical Field
The invention belongs to the technical field of sewing equipment, and relates to a sewing machine.
Background
A flat-seam sewing machine is a machine which uses a single sewing thread to form a stitch on a material to be sewn, thereby interweaving or sewing one or more layers of the material to be sewn. The flat sewing machine can be used for sewing fabrics such as cotton, hemp, silk, wool and rayon and products such as leather, plastics and paper, the thin material is generally used for knitting, underwear, shirts, uniforms and the like, the thick material is generally used for various sportswear, jeans, fashion, overcoat, shoes, hats, leather, bags and the like, and the flat sewing machine is the most basic vehicle type in sewing equipment.
At present, when a flat sewing machine finishes sewing and trimming, because the stitch length cannot be adjusted, the bottom thread end of one stitch length cannot be self-locked, a long thread end and a short thread end are presented at the trimming position of a sewn material, and the two thread ends are long and short and are arranged in tandem, so that the thread ends left after trimming are insecure, and can fall off by slightly pulling, and the sewing effect is influenced. In addition, the thread ends are long and lack of aesthetic feeling.
Disclosure of Invention
The invention provides a sewing machine aiming at the problems in the prior art, and the technical problems to be solved by the invention are as follows: how to realize the close sewing or the variable stitch distance when cutting the thread and improve the sewing effect.
The purpose of the invention can be realized by the following technical scheme:
a sewing machine comprises a first driver and a first connecting rod, wherein the first connecting rod is rotatably connected to a bottom plate of a machine shell, one end of the first connecting rod is connected with a movable part of the first driver, the other end of the first connecting rod is connected with a movable part of a second driver, the movable part of the second driver is further connected with the second connecting rod, the second connecting rod is driven by the first driver to rotate, so that the other end of the second connecting rod can drive the second connecting rod to move to realize adjustment to a corresponding stitch length for close sewing, and the action of the first driver is controlled by a controller.
In the sewing machine, the first connecting rod is connected to the bottom plate of the machine shell through the connecting shaft, and the first connecting rod can rotate around the connecting shaft.
In the sewing machine, the movable part of the first driver is provided with the ejector pin, the ejector pin is abutted against one end of the first connecting rod, and the movable part of the first driver drives the first connecting rod to rotate.
In the sewing machine, the first driver is an electromagnet assembly, and the electromagnet assembly is arranged on the bottom plate of the machine shell through an electromagnet support.
In the sewing machine, the connecting shaft is a shaft screw.
In the sewing machine, the connecting shaft is sleeved with a torsion spring, the rotating arms of the torsion spring are respectively connected to the first connecting rod and the bottom plate of the machine shell, and the torsion spring drives the first connecting rod to automatically reset.
In the sewing machine, a limiting pin is arranged at one end, close to the second driver, of the second connecting rod, and the other end of the second connecting rod is abutted to and interacted with the limiting pin.
In the sewing machine, an outer sleeve is arranged at the outer end of the movable part of the second driver, and the other end of the first connecting rod is abutted against and interacted with the outer sleeve.
In the sewing machine, the other end of the first connecting rod is provided with the slot, and one end of the second connecting rod is arranged in the slot, so that the other end of the first connecting rod is positioned at one side of the outer sleeve and can be abutted against the outer sleeve.
In the sewing machine, the second driver is a backstitch electromagnet assembly.
Compared with the prior art, the invention has the following advantages:
the invention can solve the problems that the thread end is not beautiful after being cut and the thread end is overlong after being cut in the prior art, and can adjust the stitch length during sewing through a mechanical structure. A small section of close sewing or variable-stitch-length sewing is carried out before thread trimming, so that the thread end after thread trimming is shortened, the remained thread end is firmly connected and is not easy to fall off after being pulled, the sewing effect is improved, and the attractiveness is increased.
Drawings
FIG. 1 is a schematic view of a first link abutting and interacting with a limit pin according to the present invention.
FIG. 2 is a schematic view of the first connecting rod of the present invention abutting and interacting with a backstitch electromagnet core sleeve.
FIG. 3 is a schematic view of a backstitch electromagnet core sleeve of the present invention.
Fig. 4 is a schematic view of the other end of the first connecting rod of the present invention provided with a slot.
FIG. 5 is a perspective view of a first connecting rod of the present invention in abutting and interacting relation with a backstitch electromagnet core sleeve.
In the figure, 1, a first connecting rod; 2. a chassis base plate; 3. a second connecting rod; 4. an automatic material pouring and feeding crank; 5. the automatic reverse feeding pull rod; 6. a swing plate base; 7. a trimming electromagnet assembly; 8. an axial screw; 9. a knock pin; 10 an electromagnet assembly; 11. an electromagnet support; 12. an electromagnet core; 13. backstitch electromagnet assembly; 14. backstitch electromagnet cores; 15. a torsion spring; 16. a spacing pin; 17. a vertical plate; 18. backstitch electromagnet core sleeve; 19. a horizontal portion; 20. a link pin; 21. a vertical portion; 22. and (4) slotting.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to fig. 1 to 5, but the present invention is not limited to these embodiments.
A sewing machine comprises a driver I and a connecting rod I1, wherein the connecting rod I1 is rotationally connected on a machine shell bottom plate 2, one end of the connecting rod I1 is connected with the movable part of the driver I, the other end is connected with the movable part of the driver II, the movable part of the second driver is also connected with the second connecting rod 3, the first connecting rod 1 is driven by the first driver to rotate so that the other end of the first connecting rod can drive the second connecting rod 3 to move, the second connecting rod 3 drives the automatic reverse feeding crank 4, and then acting on the swing plate seat 6 through the automatic reverse feeding pull rod 5, controlling the needle pitch by the swing plate seat 6, so that the subsequent needle pitch is changed into a corresponding needle pitch (any value or negative value including 0 needle pitch, namely reverse sewing) preset when the driver I is installed, the driver keeps acting at the moment, the sewing machine moves for a set needle number under a corresponding small needle pitch, and the close sewing is realized, wherein the actions of the driver I and the driver II are controlled by the controller. After the set needle number is finished, the controller controls the trimming electromagnet assembly 7 to work to trim threads, and after trimming is finished, the controller controls the action of the driver I to cancel, so that the cloth feeding amount is reduced during trimming, and the thread end is shortened. Of course, the controller may control the first driver to cancel the operation after the seam sealing operation is completed. Because the invention carries out a small section of close sewing or variable-stitch-length sewing before trimming, the thread end after trimming is shortened, the remained thread end is firmly connected and is not easy to fall off after being pulled, the sewing effect is improved, and the aesthetic degree is increased.
The connecting rod I1 is connected to the bottom plate 2 of the machine shell through a connecting shaft, and the connecting rod I1 can swing around the connecting shaft.
Preferably, the connecting shaft is a shaft screw 8. Because the shaft position screw 8 is convenient to install, the connection is firm. Of course, the connecting shaft may be an optical shaft with a thread at one end, but in order to position the first connecting rod 1, a retaining ring or a snap spring needs to be arranged at the other end of the optical shaft.
In addition, a top pin 9 is arranged on the movable part of the first driver, the top pin 9 is abutted against one end of the first connecting rod 1, and the movable part of the first driver drives the first connecting rod 1 to rotate. When the movable part of the first driver extends outwards, the ejector pin 9 acts on one end of the first connecting rod 1 to enable the first connecting rod to rotate around the connecting shaft. Of course, an arc-shaped groove can be formed at one end of the first connecting rod 1, and the movable part of the first driver is arranged in the arc-shaped groove of the first connecting rod 1 in a penetrating mode to be connected.
Furthermore, the first driver is an electromagnet assembly 10, and the electromagnet assembly 10 is arranged on the chassis base plate 2 through an electromagnet bracket 11. Of course, the first actuator may also adopt an air cylinder as another scheme. The electromagnet assembly 10 is relatively better used in this configuration. Correspondingly, the movable part of the first driver is an electromagnet core 12.
Similarly, the second driver is a backstitch electromagnet assembly 13. Of course, the second driver may also adopt an air cylinder as another scheme. Relatively speaking, backstitch electromagnet assembly 13 is used better in this structure. Correspondingly, the movable part of the second driver is a backstitch electromagnet core 14.
In order to enable the first connecting rod 1 to automatically reset, in the embodiment, a torsion spring 15 is sleeved on the connecting shaft, rotating arms of the torsion spring 15 are respectively connected to the first connecting rod 1 and the bottom plate 2 of the casing, and the torsion spring 15 can drive the first connecting rod 1 to automatically reset under the condition that the action of the first driver is lost.
In this embodiment, a limit pin 16 is disposed at one end of the second connecting rod 3 close to the second actuator, and the other end of the first connecting rod 1 abuts against and interacts with the limit pin 16. The other end of the first connecting rod 1 is a bent vertical plate 17, and the end face of the vertical plate 17 is abutted to the limiting pin 16 and interacts with the limiting pin.
The working principle of the structure is as follows: when a thread cutting instruction is obtained, the electromagnet assembly 10 is started, the electromagnet core 12 extends outwards to drive the ejector pin 9 to move rightwards, the connecting rod I1 is pushed to rotate around the rotating shaft in the moving process, after the connecting rod I rotates to a certain angle, the other end of the connecting rod I1 is abutted against the limiting pin 16 and interacts with the limiting pin to enable the backstitch electromagnet core 14 to retract inwards, as the connecting rod II 3 is connected to the backstitch electromagnet core 14, the connecting rod II 3 is driven to move, the connecting rod II 3 drives the automatic backstitch crank 4, then the automatic backstitch pull rod 5 acts on the swinging plate seat 6, the needle pitch is controlled by the swinging plate seat 6, the subsequent needle pitch is changed into a small needle pitch (any value including 0 needle pitch or negative value, namely reverse sewing) preset when the electromagnet assembly 10 is installed, at the moment, the controller controls the electromagnet assembly 10 to keep acting, and enables the sewing machine to walk for setting the needle number, after the set needle number is finished, the controller controls the thread cutting electromagnet assembly 7 to work, so that the thread cutting effect is achieved, after thread cutting is finished, the controller controls the electromagnet assembly 10 to cancel the action, and the first connecting rod 1 automatically resets. The operation cancellation of the electromagnet assembly 10 controlled by the controller may be set after the sewing machine has finished the set number of stitches and before the thread trimming electromagnet assembly 7 is controlled by the controller to operate.
As another scheme, an outer sleeve is arranged at the outer end of the movable part of the second driver, and the outer sleeve in the embodiment is a backstitch electromagnet core sleeve 18. The backstitch electromagnet core sleeve 18 is U-shaped, the two horizontal portions 19 are respectively located on the upper surface and the lower surface of the backstitch electromagnet core 14 and are connected to one end of the second connecting rod 3 through a connecting rod pin 20, the vertical portion 21 of the backstitch electromagnet core sleeve 18 is located at the front end of the backstitch electromagnet core 14, the other end of the first connecting rod 1 is also a bent vertical plate 17, and the vertical plate 17 is abutted to and interacts with the vertical portion 21 of the backstitch electromagnet core sleeve 18.
Furthermore, the other end of the first connecting rod 1 is provided with a slot 22, and one end of the second connecting rod 3 is arranged in the slot 22, so that the other end of the first connecting rod 1 is positioned at one side of the backstitch electromagnet core sleeve 18 and can be abutted against the backstitch electromagnet core sleeve 18.
The working principle of the structure is as follows: when a trimming instruction is obtained, the electromagnet assembly 10 is started, the electromagnet core 10 extends outwards to drive the ejector pin 9 to move rightwards, and the connecting rod I1 is pushed to rotate around the rotating shaft in the moving process. When the sewing machine rotates to a certain angle, the other end of the connecting rod I1 is abutted against and interacts with the backstitch electromagnet core sleeve 18, so that the backstitch electromagnet core 14 connected with the backstitch electromagnet core sleeve 18 through the connecting rod pin 20 is driven to retract, the backstitch electromagnet core 14 drives the connecting rod II 3 to move, the connecting rod II 3 drives the automatic backstitch crank 4, then the automatic backstitch pull rod 5 acts on the swinging plate seat 6 to control the needle pitch by the swinging plate seat 6, the subsequent needle pitch is changed into the preset small needle pitch (any value including 0 needle pitch or the negative value needle pitch, namely reverse sewing) when the electromagnet assembly 10 is installed, the controller controls the electromagnet assembly 10 to keep acting at the moment, the sewing machine runs the set needle number under the small needle pitch, the thread cutting electromagnet assembly 7 works after the set needle number is run, the thread cutting effect is achieved, and the controller controls the action of the electromagnet assembly 10 to cancel after the thread cutting is finished, the first connecting rod 1 automatically resets. Similarly, the action cancellation of the electromagnet assembly 10 controlled by the controller may be set after the sewing machine finishes the set number of stitches and before the thread cutting electromagnet assembly 7 is controlled by the controller to operate.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (9)
1. A sewing machine characterized by: the device comprises a first driver and a first connecting rod (1), wherein the first connecting rod (1) is rotatably connected to a bottom plate (2) of a machine shell, one end of the first connecting rod (1) is connected with a movable part of the first driver, the other end of the first connecting rod is connected with a movable part of a second driver, the movable part of the second driver is also connected with a second connecting rod (3), the first connecting rod (1) is driven by the first driver to rotate, so that the other end of the first connecting rod can drive the second connecting rod (3) to move to realize adjustment to a corresponding needle pitch for tight seam, and the action of the first driver is controlled by a; a limiting pin (16) is arranged at one end, close to the second driver, of the second connecting rod (3); one end of the first connecting rod (1) connected with the second driver is a bent vertical plate (17), and the end face of the vertical plate (17) is abutted against and interacted with the limiting pin (16).
2. A sewing machine according to claim 1, wherein: the first connecting rod (1) is connected to the bottom plate (2) of the machine shell through a connecting shaft, and the first connecting rod (1) can rotate around the connecting shaft.
3. A sewing machine according to claim 1 or 2, characterized in that: and a movable part of the first driver is provided with a top pin (9), the top pin (9) is abutted against one end of the first connecting rod (1), and the movable part of the first driver drives the first connecting rod (1) to rotate.
4. A sewing machine according to claim 1 or 2, characterized in that: the first driver is an electromagnet assembly (10), and the electromagnet assembly (10) is arranged on the bottom plate (2) of the machine shell through an electromagnet support (11).
5. A sewing machine according to claim 2, wherein: the connecting shaft is a shaft position screw (8).
6. A sewing machine according to claim 2 or 5, characterized in that: the connecting shaft is sleeved with a torsion spring (15), rotating arms of the torsion spring (15) are connected to the first connecting rod (1) and the machine shell bottom plate (2) respectively, and the torsion spring (15) drives the first connecting rod (1) to reset automatically.
7. A sewing machine according to claim 1, wherein: an outer sleeve is arranged at the outer end of the movable part of the second driver, and the other end of the first connecting rod (1) is abutted against and interacts with the outer sleeve.
8. A sewing machine according to claim 7, wherein: the other end of the first connecting rod (1) is provided with a slot (22), and one end of the second connecting rod (3) is arranged in the slot (22) to enable the other end of the first connecting rod (1) to be located on one side of the outer sleeve and to be abutted to the outer sleeve.
9. A sewing machine according to claim 1, wherein: and the second driver is a backstitch electromagnet assembly (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611210590.6A CN106637733B (en) | 2016-12-24 | 2016-12-24 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611210590.6A CN106637733B (en) | 2016-12-24 | 2016-12-24 | Sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106637733A CN106637733A (en) | 2017-05-10 |
| CN106637733B true CN106637733B (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611210590.6A Active CN106637733B (en) | 2016-12-24 | 2016-12-24 | Sewing machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN106637733B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326555B (en) * | 2017-08-07 | 2020-01-31 | 杰克缝纫机股份有限公司 | kinds of sewing machine |
| CN108286133A (en) * | 2018-03-23 | 2018-07-17 | 浙江美机缝纫机有限公司 | The close joint device of sewing machine |
| CN108796856B (en) * | 2018-06-08 | 2020-10-02 | 杰克缝纫机股份有限公司 | Automatic thread trimming mechanism of sewing machine |
| CN109023746B (en) * | 2018-08-09 | 2021-03-30 | 杰克缝纫机股份有限公司 | Method and device for adjusting stitch length of flat sewing machine |
| CN109208197A (en) * | 2018-10-11 | 2019-01-15 | 阮积康 | A kind of adjustable electric control driving device of sewing needle distance density |
| CN109554850B (en) * | 2018-11-14 | 2021-05-07 | 杰克缝纫机股份有限公司 | Sewing machine and short thread end device for sewing machine needle |
| CN109736023B (en) * | 2018-12-15 | 2021-09-17 | 浙江速客智能科技有限公司 | Driving device of sewing machine and control method thereof |
| CN109736032B (en) * | 2019-01-11 | 2020-11-13 | 杰克缝纫机股份有限公司 | Backstitch mechanism |
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| CN1208089A (en) * | 1997-08-12 | 1999-02-17 | 飞马缝纫机制造株式会社 | Method and apparatus for preventing stitch loosening |
| CN201250335Y (en) * | 2008-08-22 | 2009-06-03 | 阮孟定 | Backstitch device capable of automatically adjusting needle gauge |
| CN201354405Y (en) * | 2009-02-06 | 2009-12-02 | 中国标准缝纫机公司上海惠工缝纫机三厂 | Differential motion seam adjusting mechanism of compound feeding seamer |
| CN103088563A (en) * | 2013-01-17 | 2013-05-08 | 新杰克缝纫机股份有限公司 | Method and device for shortening flat sewing machine trimmed thread |
| CN203049236U (en) * | 2013-01-17 | 2013-07-10 | 新杰克缝纫机股份有限公司 | Device shortening lockstitch sewing machine trimmed thread |
| CN203049231U (en) * | 2013-01-17 | 2013-07-10 | 新杰克缝纫机股份有限公司 | Device with shortened lockstitch sewing machine threads after thread trimming |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5925603B2 (en) * | 2012-05-31 | 2016-05-25 | Juki株式会社 | sewing machine |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1208089A (en) * | 1997-08-12 | 1999-02-17 | 飞马缝纫机制造株式会社 | Method and apparatus for preventing stitch loosening |
| CN201250335Y (en) * | 2008-08-22 | 2009-06-03 | 阮孟定 | Backstitch device capable of automatically adjusting needle gauge |
| CN201354405Y (en) * | 2009-02-06 | 2009-12-02 | 中国标准缝纫机公司上海惠工缝纫机三厂 | Differential motion seam adjusting mechanism of compound feeding seamer |
| CN103088563A (en) * | 2013-01-17 | 2013-05-08 | 新杰克缝纫机股份有限公司 | Method and device for shortening flat sewing machine trimmed thread |
| CN203049236U (en) * | 2013-01-17 | 2013-07-10 | 新杰克缝纫机股份有限公司 | Device shortening lockstitch sewing machine trimmed thread |
| CN203049231U (en) * | 2013-01-17 | 2013-07-10 | 新杰克缝纫机股份有限公司 | Device with shortened lockstitch sewing machine threads after thread trimming |
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| CN106637733A (en) | 2017-05-10 |
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Address after: 318000 no.1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |