CN213328131U - Backstitch mechanism of sewing machine - Google Patents
Backstitch mechanism of sewing machine Download PDFInfo
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- CN213328131U CN213328131U CN202021342688.9U CN202021342688U CN213328131U CN 213328131 U CN213328131 U CN 213328131U CN 202021342688 U CN202021342688 U CN 202021342688U CN 213328131 U CN213328131 U CN 213328131U
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- backstitch
- sewing machine
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- adjusting seat
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Abstract
The utility model belongs to the technical field of make up equipment, a sewing machine's backstitch mechanism is related to, it is required when having solved current sewing machine backstitch drive power and the big scheduling problem of energy consumption. The backstitch mechanism comprises a backstitch shaft, a needle pitch adjusting seat, a backstitch operating rod crank and a driving source, wherein the backstitch shaft is rotatably arranged on a base of the sewing machine and can rotate around the axis of the backstitch shaft; or the driving source is connected with or contacted with the stitch length adjusting seat, and the backstitch operating rod crank drives the backstitch shaft to rotate by driving the stitch length adjusting seat to swing. The utility model discloses required drive power and energy consumption when can effectively reducing the backstitch.
Description
Technical Field
The utility model belongs to the technical field of make up equipment, a backstitch mechanism of sewing machine is related to.
Background
When a traditional sewing machine performs reinforcement sewing, the backstitch wrench is pressed down, and the cloth can move in the opposite direction; when the backstitch wrench is loosened, the clothing material can move towards the positive direction, and the clothing material can be reinforced and sewn for several times after being repeated for several times.
In order to improve sewing efficiency and reduce operation intensity, the existing sewing machine gradually adopts an electromagnet or a cylinder to drive to realize automatic backstitch.
The backstitch mechanism of the sewing machine disclosed in the Chinese patent CN208055614U comprises a backstitch shaft, a crank which is tightly held at the periphery of the backstitch shaft and can drive the backstitch shaft to rotate, an air cylinder and an ejector rod which is arranged on an output shaft of the air cylinder, is opposite to the crank and can move along with the output shaft of the air cylinder and push the crank to rotate. When the output shaft of the cylinder extends out, the ejector rod is driven to move synchronously, so that the ejector rod pushes the crank to rotate, the backstitch shaft is driven to rotate synchronously, and the backstitch purpose is achieved.
However, the structure needs a large force to drive, the requirement on the driving force of the cylinder is high, and the energy consumption is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at having the above-mentioned problem to current technique, provided a sewing machine's backstitch mechanism, the utility model aims to solve the technical problem that: how to reduce the driving force and energy consumption required by the sewing machine when executing backstitch.
The purpose of the utility model can be realized by the following technical proposal:
a backstitch mechanism of a sewing machine, characterized in that the backstitch mechanism comprises:
the backstitch shaft is rotatably arranged on the base of the sewing machine and can rotate around the axis of the backstitch shaft;
the needle pitch adjusting seat is provided with a fulcrum which is in rotating fit with a shell of the sewing machine, and the needle pitch adjusting seat can swing around the fulcrum;
the fixed end of the backstitch operating rod crank is fixedly connected with the backstitch shaft, and the movable end of the backstitch operating rod crank is movably connected with the needle pitch adjusting seat;
the driving source is connected with or contacted with the backstitch operating rod crank, and can drive the backstitch operating rod crank to swing so as to enable the needle pitch adjusting seat and the backstitch shaft to move; or the driving source is connected with or contacted with the stitch length adjusting seat, can drive the stitch length adjusting seat to swing, and drives the backstitch shaft to rotate through the backstitch operating rod crank.
The working principle is as follows: when the driving source is connected or contacted with the backstitch operating rod crank, the driving source directly drives the backstitch operating rod crank to swing so as to drive the needle pitch adjusting seat and the backstitch shaft to move and realize automatic backstitch; when the driving source is connected or contacted with the stitch length adjusting seat, the driving source can drive the stitch length adjusting seat to swing, and the backstitch shaft is driven to rotate by the backstitch operating rod crank, so that the stitch length adjusting seat and the backstitch shaft move together finally, and automatic backstitch is realized. Compared with the prior art, the driving force and the energy consumption required during backstitch can be effectively reduced.
In the backstitch mechanism of the sewing machine, a sliding groove is formed in the needle pitch adjusting seat, and a connecting part in movable fit with the sliding groove is arranged at the movable end of the backstitch operating rod crank. When the stitch length adjusting seat swings around the pivot of the stitch length adjusting seat, the backstitch operating rod crank is driven to swing around the fixed end of the backstitch operating rod crank through the matching of the sliding groove and the connecting part, and therefore the backstitch shaft is driven to rotate.
In the backstitch mechanism of the sewing machine, as one scheme, an output shaft is arranged on the driving source, and the outer end of the output shaft can be in contact with the movable end of the backstitch operating rod crank to drive the backstitch operating rod crank to swing. The output shaft of the driving source extends out to drive the backstitch operating rod crank to swing, thereby driving the needle pitch adjusting seat and the backstitch shaft to move.
In the backstitch mechanism of a sewing machine described above, an elastic buffer layer is provided at an outer end of the output shaft of the drive source. After the buffer layer is designed, the abrasion and the noise generated when the output shaft is contacted with the backstitch operating rod crank can be reduced.
In the above-mentioned backstitch mechanism of a sewing machine, as another scheme, the driving source with be provided with drive assembly between the gauge needle regulation seat, the driving source can drive through drive assembly the gauge needle regulation seat swing.
In the backstitch mechanism of the sewing machine, the transmission assembly comprises a transmission connecting rod, one end of the transmission connecting rod is hinged with the output shaft of the driving source, and the other end of the transmission connecting rod is hinged with the needle pitch adjusting seat. The output shaft of the driving source extends to drive the transmission connecting rod to move, so that the needle pitch adjusting seat is driven to swing.
In the backstitch mechanism of the sewing machine, a first mounting hole is formed in the output shaft of the driving source, a second mounting hole which is the same as the first mounting hole is formed in one end of the transmission connecting rod, and a first connecting pin is inserted into the first mounting hole and the second mounting hole. The design can realize the hinge joint between the driving source and the transmission connecting rod.
In the backstitch mechanism of the sewing machine, the needle pitch adjusting seat is provided with a boss, the boss is provided with a second connecting pin, and the other end of the transmission connecting rod is provided with a third mounting hole which is in running fit with the second connecting pin. The design can realize the hinging between the transmission connecting rod and the needle pitch adjusting seat.
In the backstitch mechanism of the sewing machine, a fourth mounting hole is formed in the fixed end of the backstitch operating rod crank, and the backstitch shaft penetrates through the fourth mounting hole and is fixed with the fourth mounting hole.
In the above-mentioned backstitch mechanism of a sewing machine, the driving source includes a cylinder or an electromagnet.
Compared with the prior art, the utility model has the advantages of it is following:
this application can effectively reduce required drive power and energy consumption when this sewing machine backstitch.
Drawings
FIG. 1 is a perspective view of the backstitch mechanism according to the first embodiment.
FIG. 2 is a schematic structural diagram of one view angle of the backstitch mechanism according to the first embodiment.
FIG. 3 is a schematic structural view of another perspective of the backstitch mechanism in accordance with one embodiment.
FIG. 4 is a perspective view of the backstitch mechanism according to the second embodiment.
FIG. 5 is an exploded view of the backstitch mechanism of the second embodiment.
Fig. 6 is a schematic structural view of the needle pitch adjusting base according to the second embodiment.
In the figure, 1, a backstitch shaft; 2. backstitch lever cranks; 3. a needle pitch adjusting seat; 4. a drive source; 5. a chute; 6. a connecting portion; 7. an output shaft; 8. a transmission connecting rod; 9. a first mounting hole; 10. a second mounting hole; 11. a first connecting pin; 12. a boss; 13. a second connecting pin; 14. a third mounting hole; 15. and a fourth mounting hole.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
The first embodiment is as follows:
as shown in fig. 1, 2 and 3, the backstitch mechanism comprises a backstitch shaft 1, a needle pitch adjusting seat 3, a backstitch operating rod crank 2 and a driving source 4, wherein the driving source 4 comprises an air cylinder or an electromagnet, and the driving source 4 is preferably an air cylinder in the embodiment.
The backstitch shaft 1 is rotationally arranged on a base of the sewing machine and can rotate around the axis of the backstitch shaft; the needle pitch adjusting seat 3 is provided with a fulcrum which is in rotating fit with a shell of the sewing machine, and the needle pitch adjusting seat 3 can swing around the fulcrum; the fixed end of the backstitch operating rod crank 2 is fixedly connected with the backstitch shaft 1, and the movable end of the backstitch operating rod crank 2 is movably connected with the needle pitch adjusting seat 3.
In this embodiment, specifically, the fixed end of the backstitch lever crank 2 is provided with a mounting hole four 15, and the backstitch shaft 1 passes through the mounting hole four 15 and is fixed to the mounting hole four 15. The needle pitch adjusting seat 3 is provided with a sliding groove 5, and the movable end of the backstitch operating rod crank 2 is provided with a connecting part 6 which is movably matched with the sliding groove 5.
When the stitch length adjusting seat 3 swings around the pivot of the stitch length adjusting seat, the backstitch operating rod crank 2 is driven to swing around the fixed end of the backstitch operating rod crank through the matching of the sliding groove 5 and the connecting part 6, so that the backstitch shaft 1 is driven to rotate.
It should be noted here that in the present embodiment, preferably, the backstitch operating lever crank 2 and the needle pitch adjusting seat 3 are movably matched with the connecting portion 6 by the sliding groove 5. Other transmission mechanisms, such as link mechanisms, etc., may be used, and further, some changes in the shapes of the sliding grooves 5 and the connecting portions 6, etc., may be made without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.
As shown in fig. 1, 2 and 3, in the present embodiment, the driving source 4 is connected to or in contact with the backstitch operating lever crank 2, and can drive the backstitch operating lever crank 2 to swing, so as to move the needle pitch adjusting base 3 and the backstitch shaft 1.
Specifically, the driving source 4 is provided with an output shaft 7, and the outer end of the output shaft 7 can contact with the movable end of the backstitch operating lever crank 2 to drive the backstitch operating lever crank 2 to swing. An output shaft 7 of the driving source 4 extends out to drive the backstitch operating rod crank 2 to swing, so that the needle pitch adjusting seat 3 and the backstitch shaft 1 are driven to move. In order to reduce the abrasion and noise generated when the output shaft 7 contacts the backstitch operating lever crank 2, an elastic buffer layer is arranged at the outer end of the output shaft 7 of the driving source 4, and the elastic buffer layer can be made of hard rubber or the like.
It should be noted that in the present embodiment, the output shaft 7 is in contact with the backstitch operating lever crank 2, and as another scheme, the connection may be realized by a connecting rod, a sliding chute, or the like.
The working principle of the embodiment is as follows: when backstitch is executed, the driving source 4 directly drives the backstitch operating rod crank 2 to swing, so that the needle pitch adjusting seat 3 and the backstitch shaft 1 are driven to move, and automatic backstitch is realized.
Example two:
as shown in fig. 4, 5 and 6, the present embodiment is substantially the same as the first embodiment, except that in the present embodiment, the driving source 4 is connected or contacted with the needle pitch adjusting base 3, and can drive the needle pitch adjusting base 3 to swing, and the backstitch shaft 1 is driven to rotate by the backstitch operating lever crank 2.
Preferably, as shown in fig. 4 and 5, a transmission assembly is disposed between the driving source 4 and the needle pitch adjusting base 3, and the driving source 4 can drive the needle pitch adjusting base 3 to swing through the transmission assembly.
Preferably, the transmission assembly comprises a transmission connecting rod 8, one end of the transmission connecting rod 8 is hinged with the output shaft 7 of the driving source 4, and the other end of the transmission connecting rod 8 is hinged with the needle pitch adjusting seat 3. The output shaft 7 of the driving source 4 extends to drive the transmission connecting rod 8 to move, thereby driving the needle pitch adjusting seat 3 to swing.
Specifically, the output shaft 7 of the driving source 4 is provided with a first mounting hole 9, one end of the transmission link 8 is provided with a second mounting hole 10 corresponding to the first mounting hole 9, and a first connecting pin 11 is inserted into the first mounting hole 9 and the second mounting hole 10. The needle pitch adjusting seat 3 is provided with a boss 12, the boss 12 is provided with a second connecting pin 13, and the other end of the transmission connecting rod 8 is provided with a third mounting hole 14 which is in running fit with the second connecting pin 13. As designed above, the drive source 4 and the transmission link 8 can be hinged together, and the transmission link 8 and the needle gage adjusting base 3 can be hinged together.
It should be noted that, in this embodiment, the driving source 4 is connected to the needle pitch adjusting base 3 by the transmission link 8, and as other schemes, a contact scheme may be adopted between the driving source and the needle pitch adjusting base, and only the needle pitch adjusting base 3 needs to be driven to swing.
The working principle of the embodiment is as follows: the driving source 4 can drive the stitch length adjusting seat 3 to swing, and the backstitch operating rod crank 2 drives the backstitch shaft 1 to rotate, so that the stitch length adjusting seat 3 and the backstitch shaft 1 move together finally, and automatic backstitch is realized.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. A backstitch mechanism of a sewing machine, characterized in that the backstitch mechanism comprises:
the backstitch shaft (1) is rotationally arranged on a base of the sewing machine, and can rotate around the axis of the backstitch shaft (1);
the needle gauge adjusting seat (3) is provided with a fulcrum which is in rotating fit with a shell of the sewing machine, and the needle gauge adjusting seat (3) can swing around the fulcrum;
the fixed end of the backstitch operating rod crank (2) is fixedly connected with the backstitch shaft (1), and the movable end of the backstitch operating rod crank (2) is movably connected with the needle pitch adjusting seat (3);
the driving source (4) is connected or contacted with the backstitch operating rod crank (2), and can drive the backstitch operating rod crank (2) to swing so as to enable the needle pitch adjusting seat (3) and the backstitch shaft (1) to move; or the driving source (4) is connected with or contacted with the needle pitch adjusting seat (3), can drive the needle pitch adjusting seat (3) to swing, and drives the backstitch shaft (1) to rotate through the backstitch operating rod crank (2).
2. The backstitch mechanism of a sewing machine according to claim 1, characterized in that a sliding groove (5) is formed on the needle pitch adjusting seat (3), and a connecting part (6) which is movably matched with the sliding groove (5) is arranged at the movable end of the backstitch operating lever crank (2).
3. The backstitch mechanism of a sewing machine according to claim 1 or 2, characterized in that an output shaft (7) is provided on the driving source (4), and the outer end of the output shaft (7) can contact with the movable end of the backstitch operating lever crank (2) to drive the backstitch operating lever crank (2) to swing.
4. Backstitch mechanism of a sewing machine according to claim 3, characterized in that an elastic buffer layer is provided at the outer end of the output shaft (7) of the drive source (4).
5. Backstitch mechanism of a sewing machine according to claim 1 or 2, characterized in that a transmission assembly is arranged between the drive source (4) and the needle gage adjustment base (3), and the drive source (4) can drive the needle gage adjustment base (3) to swing through the transmission assembly.
6. Backstitch mechanism according to claim 5, characterized in that the transmission assembly comprises a transmission link (8), one end of the transmission link (8) is hinged to the output shaft (7) of the drive source (4), and the other end of the transmission link (8) is hinged to the needle pitch adjusting seat (3).
7. The backstitch mechanism of a sewing machine according to claim 6, wherein the output shaft (7) of the driving source (4) is provided with a first mounting hole (9), one end of the transmission link (8) is provided with a second mounting hole (10) corresponding to the first mounting hole (9), and a first connecting pin (11) is inserted into the first mounting hole (9) and the second mounting hole (10).
8. The backstitch mechanism of a sewing machine according to claim 7, characterized in that a boss (12) is provided on the needle pitch adjusting base (3), a second connecting pin (13) is provided on the boss (12), and a third mounting hole (14) rotatably fitted with the second connecting pin (13) is provided at the other end of the transmission link (8).
9. The backstitch mechanism of a sewing machine according to claim 1 or 2, characterized in that the fixed end of the backstitch operating lever crank (2) is provided with a mounting hole four (15), the backstitch shaft (1) passes through the mounting hole four (15) and the backstitch shaft and the mounting hole four (15) are fixed.
10. Backstitch mechanism of a sewing machine according to claim 1 or 2, characterized in that the drive source (4) comprises a cylinder or an electromagnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021342688.9U CN213328131U (en) | 2020-07-09 | 2020-07-09 | Backstitch mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021342688.9U CN213328131U (en) | 2020-07-09 | 2020-07-09 | Backstitch mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213328131U true CN213328131U (en) | 2021-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021342688.9U Active CN213328131U (en) | 2020-07-09 | 2020-07-09 | Backstitch mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213328131U (en) |
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2020
- 2020-07-09 CN CN202021342688.9U patent/CN213328131U/en active Active
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