CN215593382U - Electronic thread releasing device of sewing machine - Google Patents
Electronic thread releasing device of sewing machine Download PDFInfo
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- CN215593382U CN215593382U CN202120365948.2U CN202120365948U CN215593382U CN 215593382 U CN215593382 U CN 215593382U CN 202120365948 U CN202120365948 U CN 202120365948U CN 215593382 U CN215593382 U CN 215593382U
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Abstract
The utility model provides an electronic thread releasing device of a sewing machine, and belongs to the technical field of thread releasing equipment of sewing machines. The sewing machine comprises a machine shell and a thread clamping device, the thread clamping device is installed on the machine shell, the electronic thread loosening device comprises an electromagnet and a thread loosening auxiliary nail, the electromagnet comprises a shell and an iron core capable of moving relative to the shell, the thread loosening auxiliary nail is arranged in the thread clamping device in a penetrating mode, the electronic thread loosening device further comprises a pushing piece capable of pushing the thread loosening auxiliary nail to move, the pushing piece is provided with a hinge point, the iron core is perpendicular to the axis of the hinge point of the pushing piece, and the iron core can abut against the pushing piece. This thread loosening device adopts the electro-magnet drive, and electron thread loosening response is faster, and the thread loosening is stable, and then has improved the stability of trimming, and the electro-magnet is assisted the nail through the impeller direct drive thread loosening and is removed realization thread loosening, convenient and fast.
Description
Technical Field
The utility model belongs to the technical field of thread loosening equipment of sewing machines, and relates to an electronic thread loosening device of a sewing machine.
Background
The thread clamping device is a common device on a sewing machine and plays roles in loosening and clamping threads and controlling tension of the threads. The thread tension device usually performs the thread loosening action during thread trimming, so that the upper thread can be prevented from being in a tight state during thread trimming, and the condition that the upper thread is exposed out of a needle hole and the thread end is too short after thread trimming can be avoided, so that the thread tension device is very necessary for thread loosening during the thread trimming process.
Chinese patent application No. 201921494224.7 discloses a thread releasing device, including: the lifting plate is used for being connected with the pressure foot lifting front lever part so as to drive the lifting plate to lift when the pressure foot lifting front lever part rotates, and the lifting plate is provided with an inclined surface; a nail is assisted to pine line for wearing to locate the thread trapper, and the nail is assisted to pine line is equipped with butt portion, butt portion and inclined plane looks butt to make the nail axial displacement is assisted to pine line through promoting butt portion when the inclined plane moves along with the lifter plate, order about two thread clamping pieces of thread trapper separately.
In the prior art, for a needle feeding flat sewing machine, due to the fact that the head space is narrow, thread loosening action is generally carried out through a pull thread connected with a thread cutting electromagnet, the structure arrangement is complex, operation is complex, the time of thread loosening and thread cutting matching cannot be controlled, meanwhile, the pull thread penetrates through an oil disc, and the risk of oil leakage exists.
Disclosure of Invention
The utility model provides an electronic thread releasing device of a sewing machine aiming at the problems in the prior art, and the utility model aims to solve the technical problems that: how to improve the convenience and stability of the loose thread.
The purpose of the utility model can be realized by the following technical scheme:
the electronic thread loosening device of the sewing machine is characterized by further comprising a pushing piece capable of pushing the thread loosening auxiliary nail to move, wherein the pushing piece is provided with a hinged point, the iron core is perpendicular to the axis of the hinged point of the pushing piece, and the iron core can abut against the pushing piece.
The working principle is as follows: in the electronic thread releasing device, the thread clamping device is installed on the machine shell and comprises two thread releasing plates, the pushing piece is provided with a hinged point, the axis of the hinged point of the pushing piece is perpendicular to the iron core, the iron core abuts against the pushing piece, the number of parts is reduced, and the installation space is saved. When the electromagnet is electrified, the iron core pushes the pushing piece, the pushing piece pushes the auxiliary thread loosening nail, and then the auxiliary thread loosening nail pushes the gap between the two thread loosening plates in the thread clamping device to change, so that thread loosening is completed. This thread loosening device adopts the electro-magnet drive, and electron thread loosening response is faster, and the thread loosening is stable, and then has improved the stability of trimming, and the electro-magnet is assisted the nail through the impeller direct drive thread loosening and is removed realization thread loosening, convenient and fast.
In the electronic thread loosening control method of the device, the thread cutting electromagnet and the thread loosening electromagnet are controlled to be linked in an electronic control mode, and thread loosening action is carried out during thread cutting until the thread cutting action is finished. In addition, when the machine does not perform the thread cutting action, the thread loosening action is linked with the presser foot lifting action, and when the presser foot is lifted, the thread loosening electromagnet also performs the thread loosening action and keeps the thread loosening action; when the presser foot is lifted and put down, the thread-loosening electromagnet does not act. In addition, the thread-loosening electromagnet has thread-loosening protection time, and when the set holding time is reached, the electromagnet is powered off to protect the thread-loosening device.
As an embodiment, a mounting seat is fixed on the machine shell, the thread loosening auxiliary nail is connected to the mounting seat in a sliding mode, and the mounting seat and the thread loosening auxiliary nail form a thread loosening auxiliary nail assembly.
In the electronic thread releasing device of the sewing machine, the pushing member comprises a thread releasing top plate, the middle part of the thread releasing top plate is hinged to the machine shell, the thread releasing top plate is provided with two end parts, a boss I and a boss II are respectively arranged on each end part, the iron core can abut against the boss I and enable the thread releasing top plate to swing, and the boss II can abut against the thread releasing auxiliary nail.
In this structure, after the electro-magnet circular telegram, the iron core promotes the pine line roof and makes the pine line roof swing round the pin joint, and the nail is assisted to the pine line that the pine line roof promotes again, then two pine line boards of pine line clamping device the inside are assisted to the pine line and are carried out the action of loosing the line, accomplish the pine line.
In the electronic thread loosening device of the sewing machine, the first boss is provided with a first abutting surface capable of abutting against the iron core, the second boss is provided with a second abutting surface capable of abutting against the thread loosening auxiliary nail, and the second abutting surface is an inclined surface.
The second abutting surface is an inclined surface which can be an inclined plane, an inclined concave surface or an inclined convex surface. The angle of the inclined plane determines the wire loosening amount of the wire clamping device. In addition, the first abutting surface can also be a plane surface, a concave inclined surface or a convex surface.
In the electronic thread releasing device of the sewing machine, the casing is fixed with the connecting pin, the middle part of the thread releasing top plate is rotatably connected to the connecting pin, and the iron core is perpendicular to the axis of the connecting pin.
As an embodiment, the middle part of the thread releasing top plate is provided with a through hole, the connecting pin is inserted into the through hole, the thread releasing top plate can rotate around the connecting pin, and the axis of the connecting pin is perpendicular to the iron core.
In the electronic thread releasing device of the sewing machine, the connecting pin is provided with a limiting boss, and the thread releasing top plate is located on the outer side of the limiting boss and is abutted against the limiting boss. The limiting boss can prevent the thread loosening top plate from moving inwards along the axial direction of the connecting pin, and the limiting effect is achieved.
In the electronic thread releasing device of the sewing machine, a first check ring is fixed at the outer end part of the connecting pin and is positioned at the outer side of the thread releasing top plate.
The first check ring can prevent the thread loosening top plate from moving outwards along the axial direction of the connecting pin, and the first check ring and the limiting boss together play a limiting role.
In the electronic thread releasing device of the sewing machine, the outer end part of the connecting pin is clamped and fixed with the split retainer ring, and the split retainer ring is positioned on the outer side of the first retainer ring and is abutted against the first retainer ring. The split retainer ring has a limiting effect on the retainer ring, and the split retainer ring is detachably clamped and fixed on the connecting pin, so that the installation is convenient.
In the electronic thread releasing device of the sewing machine, the connecting pin is sleeved with the return spring, one end of the return spring is connected to the thread releasing top plate, and the other end of the return spring is connected to the machine shell.
When this device is in initial condition, because the effect of reset spring pine line roof support to face one and the iron core contact, the one end of nail can be assisted with the pine line roof support to face two contacts this moment, also can contactless, this mounted position that depends on the thread trapper. When the thread clamping force is too large, the thread releasing auxiliary nail is not in contact with the thread releasing top plate and keeps a certain small distance, the initial stroke of the electromagnet is not limited, and the thrust of the thread releasing top plate can be kept in the optimal state.
In the above electronic thread releasing device of the sewing machine, the pushing member includes a driving rod, an intermediate rod, a driven rod and a base plate, the base plate is fixed on the housing, one end of the driving rod is hinged to the base plate, the iron core is perpendicular to a hinge axis of one end of the driving rod, the other end of the driving rod is hinged to one end of the intermediate rod, the other end of the intermediate rod is hinged to one end of the driven rod, the other end of the driven rod is hinged to the base plate, the iron core can abut against the driving rod, and the driven rod can abut against the thread releasing auxiliary nail.
In the structure, the driving rod, the middle rod, the driven rod and the base plate form a four-bar mechanism, two adjacent rods in the three rods can flexibly rotate, and the iron core is perpendicular to the hinge axis at one end of the driving rod. When the electromagnet is powered on, the iron core pushes the driving rod, the driving rod pushes the driven rod to swing through the middle rod, the driven rod pushes the auxiliary thread loosening nail, and then the auxiliary thread loosening nail pushes a thread loosening plate in the thread clamping device to perform thread loosening action, so that thread loosening is completed.
Compared with the prior art, the utility model has the following advantages:
1. the thread releasing device is driven by the electromagnet, and the hinged point of the iron core and the pushing plate is vertically arranged, so that the number of parts can be reduced, and the installation space is saved; the electron pine response is quicker, and the pine is stable, and then has improved the stability of trimming, and the electro-magnet passes through the impeller direct drive pine and assists the nail removal and realize the pine, convenient and fast.
2. When the device is in an initial state, one end of the thread-loosening auxiliary nail can be in contact with the abutting surface II of the thread-loosening top plate or not. When the thread clamping force is too large, the thread releasing auxiliary nail is not in contact with the thread releasing top plate and keeps a certain small distance, the initial stroke of the electromagnet is not limited, and the thrust of the thread releasing top plate can be kept in the optimal state.
3. By adopting the electronic thread loosening control method of the device, the electrically controlled thread cutting electromagnet and the thread loosening electromagnet can be linked, and thread loosening action is carried out during thread cutting until the thread cutting action is finished; when the machine does not perform the thread cutting action, the thread loosening action and the presser foot lifting action are linked. In addition, the thread-releasing electromagnet has thread-releasing protection time, and when the set holding time is reached, the electromagnet is powered off to protect the thread-releasing device.
Drawings
Fig. 1 is a schematic structural view of the thread releasing device mounted on a housing.
Fig. 2 is a schematic structural view of the thread releasing device according to the first embodiment.
Fig. 3 is a schematic view of the structure of the connecting pin.
Fig. 4 is a schematic structural view of the loose top plate.
Fig. 5 is a schematic structural view of a thread releasing device in the second embodiment.
In the figure, 1 a casing; 2, a wire clamping device; 3, an electromagnet; 4, loosening the auxiliary thread and nail; 5 loosening the auxiliary nail assembly; 6, a shell; 7 iron core; 8 a pusher member; 9 loosening the thread top plate; 10, a first boss; 11, a second boss; 12, a first abutting surface; 13 abutting against the surface II; 14 a connecting pin; 15 through holes; 16 limiting bosses; 17, a first check ring; 18 opening a retainer ring; 19 a return spring; 20 a driving lever; 21 an intermediate lever; 22 a driven rod; 23 a substrate; 24 mounting a seat.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
As shown in fig. 1 and 2, the sewing machine comprises a machine shell 1 and a thread clamping device 2, the thread clamping device 2 is installed on the machine shell 1, the electronic thread loosening device comprises an electromagnet 3 and a thread loosening auxiliary nail 4, the electromagnet 3 comprises a shell 6 and an iron core 7 capable of moving relative to the shell 6, the thread loosening auxiliary nail 4 is arranged in the thread clamping device 2 in a penetrating mode, the electronic thread loosening device further comprises a pushing piece 8 capable of pushing the thread loosening auxiliary nail 4 to move, the pushing piece 8 is provided with a hinge point, the iron core 7 is perpendicular to the axis of the hinge point of the pushing piece 8, and the iron core 7 can abut against the pushing piece 8.
The wire clamping device 2 comprises two wire loosening plates, when the electromagnet 3 is electrified, the iron core 7 pushes the pushing piece 8, the pushing piece 8 pushes the wire loosening auxiliary nail 4 again, and then the wire loosening auxiliary nail 4 pushes the gap between the two wire loosening plates in the wire clamping device 2 to change so as to complete wire loosening.
In the electronic thread loosening control method of the device, the thread cutting electromagnet and the thread loosening electromagnet 3 are controlled to be linked in an electronic control mode, and thread loosening action is carried out during thread cutting until the thread cutting action is finished. In addition, when the machine does not perform the thread cutting action, the thread loosening action and the presser foot lifting action are linked, and when the presser foot is lifted, the thread loosening electromagnet 3 also performs the thread loosening action and keeps the thread loosening action; when the presser foot is lifted and put down, the thread loosening electromagnet 3 does not act. In addition, the thread-releasing electromagnet 3 has thread-releasing protection time, and when the set holding time is reached, the electromagnet 3 is powered off to protect the thread-releasing device.
As shown in FIGS. 1 and 2, as an embodiment, a mounting seat 24 is fixed on the machine shell 1, the thread-releasing auxiliary nail 4 is slidably connected on the mounting seat 24, and the mounting seat 24 and the thread-releasing auxiliary nail 4 form a thread-releasing auxiliary nail assembly 5.
As shown in fig. 2, in the present embodiment, the pushing member 8 includes a thread releasing top plate 9, a middle portion of the thread releasing top plate 9 is hinged to the casing 1, the thread releasing top plate 9 has two end portions, each end portion has a first boss 10 and a second boss 11, the iron core 7 can abut against the first boss 10 and swing the thread releasing top plate 9, and the second boss 11 can abut against the thread releasing auxiliary nail 4.
In this structure, after 3 circular telegrams of electro-magnet, iron core 7 promotes the pine line roof 9 and makes the pine line roof 9 swing round the pin joint, and the nail 4 is assisted to the pine line that the pine line roof 9 promotes again, then the pine line is assisted nail 4 and is promoted two pine line boards of 2 the inside of thread trapper and carry out the action of loosing the line, accomplishes the pine line.
As shown in fig. 4, in this embodiment, the first boss 10 has a first abutting surface 12 that can abut against the iron core 7, the second boss 11 has a second abutting surface 13 that can abut against the release auxiliary pin 4, and the second abutting surface 13 is an inclined surface.
The second abutting surface 13 is an inclined surface which can be an inclined plane, an inclined concave surface or an inclined convex surface. The angle of the inclined plane determines the thread loosening amount of the thread clamping device 2. In addition, the first abutting surface 12 can also be a plane surface, a concave inclined surface or a convex surface.
In the embodiment, as shown in fig. 1, a connecting pin 14 is fixed on the housing 1, the middle part of the thread releasing top plate 9 is rotatably connected to the connecting pin 14, and the iron core 7 is perpendicular to the axis of the connecting pin 14.
As shown in fig. 2 and 4, as an embodiment, a through hole 15 is opened in the middle of the loose wire top plate 9, a connecting pin 14 is inserted into the through hole 15, the loose wire top plate 9 can rotate around the connecting pin 14, and the axis of the connecting pin 14 is perpendicular to the iron core 7.
As shown in fig. 2 and 4, in the present embodiment, the connecting pin 14 has a limiting boss 16, and the thread releasing top plate 9 is located outside the limiting boss 16 and abuts against the limiting boss 16. The limiting boss 16 can prevent the thread releasing top plate 9 from moving inwards along the axial direction of the connecting pin 14, and plays a limiting role.
As shown in fig. 2, in the present embodiment, a first retainer 17 is fixed to the outer end of the connecting pin 14, and the first retainer 17 is located outside the loose top plate 9.
The first retainer ring 17 can prevent the thread releasing top plate 9 from moving outwards along the axial direction of the connecting pin 14, and the first retainer ring 17 and the first limiting boss 16 and the first limiting boss 10 play a limiting role together.
As shown in fig. 2, in the present embodiment, the outer end of the connecting pin 14 is clamped and fixed with a split retainer 18, and the split retainer 18 is located outside the first retainer 17 and abuts against the first retainer 17. The split retainer ring 18 has a limiting function on the retainer ring I17, and the split retainer ring 18 is detachably clamped and fixed on the connecting pin 14, so that the installation is convenient.
As shown in fig. 2, in the present embodiment, a return spring 19 is sleeved on the connecting pin 14, one end of the return spring 19 is connected to the thread releasing top plate 9, and the other end of the return spring 19 is connected to the casing 1.
When the device is in an initial state, the first abutting surface 12 of the thread releasing top plate 9 is in contact with the iron core 7 under the action of the return spring 19, and one end of the thread releasing auxiliary nail 4 can be in contact with the second abutting surface 13 of the thread releasing top plate 9 or not at the moment, which depends on the installation position of the thread clamp 2. When the thread clamping force is too large, the thread releasing auxiliary nail 4 is not in contact with the thread releasing top plate 9 and keeps a certain small distance, the initial stroke of the electromagnet 3 is not limited, and the thrust of the thread releasing top plate 9 can be kept in an optimal state.
Example two
As shown in fig. 5, in the present embodiment, the pushing member 8 includes a driving rod 20, an intermediate rod 21, a driven rod 22 and a base plate 23, the base plate 23 is fixed on the casing 1, one end of the driving rod 20 is hinged to the base plate 23, the iron core 7 is perpendicular to a hinge axis of one end of the driving rod 20, the other end of the driving rod 20 is hinged to one end of the intermediate rod 21, the other end of the intermediate rod 21 is hinged to one end of the driven rod 22, the other end of the driven rod 22 is hinged to the base plate 23, the iron core 7 can abut against the driving rod 20, and the driven rod 22 can abut against the slack auxiliary nail 4.
In the structure, a driving rod 20, an intermediate rod 21, a driven rod 22 and a base plate 23 form a four-bar linkage, two adjacent rods in the three rods can flexibly rotate, and an iron core 7 is perpendicular to a hinge axis at one end of the driving rod 20. When the electromagnet 3 is powered on, the iron core 7 pushes the driving rod 20, the driving rod 20 pushes the driven rod 22 to swing through the intermediate rod 21, the driven rod 22 pushes the auxiliary thread loosening nail 4, and then the auxiliary thread loosening nail 4 pushes a thread loosening plate in the thread clamping device 2 to perform thread loosening action, so that thread loosening is completed.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. 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 utility model as defined in the appended claims.
Claims (9)
1. An electronic thread releasing device of a sewing machine, the sewing machine comprises a machine shell (1) and a thread clamping device (2), the thread clamping device (2) is installed on the machine shell (1), the electronic thread releasing device is characterized by comprising an electromagnet (3) and a thread releasing auxiliary nail (4), the electromagnet (3) comprises a shell (6) and an iron core (7) capable of moving relative to the shell (6), the thread releasing auxiliary nail (4) penetrates through the thread clamping device (2), the electronic thread releasing device further comprises a pushing piece (8) capable of pushing the thread releasing auxiliary nail (4) to move, the pushing piece (8) is provided with a hinge point, the iron core (7) is perpendicular to the axis of the hinge point of the pushing piece (8), and the iron core (7) can abut against the pushing piece (8).
2. An electronic thread slacking off device for sewing machines according to claim 1, characterized in that said pusher (8) comprises a thread slacking top plate (9), the middle of said thread slacking top plate (9) is hinged to said machine housing (1), the thread slacking top plate (9) has two ends, each end having a first boss (10) and a second boss (11), said iron core (7) can abut against said first boss (10) and make said thread slacking top plate (9) swing, said second bosses (11) can abut against said thread slacking auxiliary nails (4).
3. The electronic thread slacking off device of a sewing machine according to claim 2, characterized in that said first boss (10) has a first abutting surface (12) capable of abutting against said iron core (7), said second boss (11) has a second abutting surface (13) capable of abutting against said thread slacking auxiliary nail (4), and said second abutting surface (13) is an inclined surface.
4. The electronic thread releasing device of a sewing machine according to claim 2, wherein a connecting pin (14) is fixed to the housing (1), the middle part of the thread releasing top plate (9) is rotatably connected to the connecting pin (14), and the iron core (7) is perpendicular to the axis of the connecting pin (14).
5. The electronic thread releasing device of a sewing machine according to claim 4, wherein the connecting pin (14) has a limit boss (16), and the thread releasing top plate (9) is located outside the limit boss (16) and abuts against the limit boss (16).
6. An electronic thread slacking off device for sewing machines according to claim 4, characterized in that a first retaining ring (17) is fixed to the outer end of the connecting pin (14), said first retaining ring (17) being located outside the thread slacking off top plate (9).
7. The electronic thread releasing device of a sewing machine according to claim 6, characterized in that the outer end of the connecting pin (14) is clamped and fixed with a split collar (18), and the split collar (18) is located outside the first collar (17) and abuts against the first collar (17).
8. The electronic thread releasing device of a sewing machine according to claim 4, wherein a return spring (19) is sleeved on the connecting pin (14), one end of the return spring (19) is connected to the thread releasing top plate (9), and the other end of the return spring (19) is connected to the machine shell (1).
9. The electronic thread slackening device of a sewing machine according to claim 1, the pushing piece (8) comprises a driving rod (20), an intermediate rod (21), a driven rod (22) and a base plate (23), the base plate (23) is fixed on the shell (1), one end of the active rod (20) is hinged with the base plate (23), the iron core (7) is vertical to the hinge axis of one end of the driving rod (20), the other end of the active rod (20) is hinged with one end of the intermediate rod (21), the other end of the middle rod (21) is hinged with one end of the driven rod (22), the other end of the driven rod (22) is hinged with the base plate (23), the iron core (7) can be abutted against the driving rod (20), the driven rod (22) can abut against the thread-loosening auxiliary nail (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120365948.2U CN215593382U (en) | 2021-02-08 | 2021-02-08 | Electronic thread releasing device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120365948.2U CN215593382U (en) | 2021-02-08 | 2021-02-08 | Electronic thread releasing device of sewing machine |
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| Publication Number | Publication Date |
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| CN215593382U true CN215593382U (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120365948.2U Active CN215593382U (en) | 2021-02-08 | 2021-02-08 | Electronic thread releasing device of sewing machine |
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| CN (1) | CN215593382U (en) |
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2021
- 2021-02-08 CN CN202120365948.2U patent/CN215593382U/en active Active
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