CN112411035A - Novel automatic backstitch transmission structure of sewing machine - Google Patents
Novel automatic backstitch transmission structure of sewing machine Download PDFInfo
- Publication number
- CN112411035A CN112411035A CN202011349847.2A CN202011349847A CN112411035A CN 112411035 A CN112411035 A CN 112411035A CN 202011349847 A CN202011349847 A CN 202011349847A CN 112411035 A CN112411035 A CN 112411035A
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- backstitch
- connecting rod
- lifting
- feeding
- crank
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/14—Devices for changing speed or for reversing direction of rotation
- D05B69/18—Devices for changing speed or for reversing direction of rotation electric, e.g. foot pedals
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/20—Control devices responsive to the number of stitches made
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a novel automatic backstitch transmission structure of a sewing machine, which relates to the technical field of sewing machines and comprises a sewing machine head, a driving mechanism, a step feeding mechanism, a tooth lifting mechanism and a backstitch mechanism; the driving mechanism is used for driving the step conveying mechanism, the tooth lifting mechanism and the backstitch mechanism to move; the step conveying mechanism and the tooth lifting mechanism are arranged on the driving mechanism and are arranged at intervals; the backstitch mechanism is arranged at the output end of the feed lifting mechanism; the driving mechanism comprises a backstitch electromagnet and a main transmission shaft, the lower end face of the backstitch electromagnet is fixedly connected with a backstitch lifting connecting rod, and the lower end of the backstitch lifting connecting rod is hinged with a backstitch connecting shaft. The backstitch can meet the backstitch needle pitch requirement only by adjusting the needle pitch adjuster, and the later maintenance is convenient; the needle pitch regulator and the feeding adjusting seat group are connected through the backstitch connecting rod to simplify the structure, reduce friction between parts, reduce noise, prolong the service life of the parts, simplify the original backstitch connecting mode and be simple and convenient to install.
Description
Technical Field
The invention relates to the technical field of sewing machines, in particular to a novel automatic backstitch transmission structure of a sewing machine.
Background
A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. The existing sewing machine is generally provided with a backstitch structure, and the backstitch mechanism on the sewing machine generally comprises two types, wherein one type is that a backstitch wrench manually drives the backstitch mechanism to act to realize backstitch, and the other type is that an electromagnet drives the backstitch mechanism to act to realize backstitch.
The prior art has the following disadvantages: the connecting rod feeding backstitch structure of the existing sewing machine is complex, the maintenance is inconvenient, the friction between parts in the connecting rod feeding backstitch structure is large, and the service life of the parts is short.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a novel automatic backstitch transmission structure of a sewing machine, which is simple in structure, convenient to operate and convenient to maintain.
In order to achieve the purpose, the invention provides the following technical scheme:
a novel automatic backstitch transmission structure of a sewing machine comprises a sewing machine head, a driving mechanism, a step-sending mechanism, a tooth-lifting mechanism and a backstitch mechanism; the driving mechanism is used for driving the step sending mechanism, the tooth lifting mechanism and the backstitch mechanism to move; the step sending mechanism and the tooth lifting mechanism are both arranged on the driving mechanism, and are arranged at intervals; the backstitch mechanism is arranged at the output end of the feed lifting mechanism; the driving mechanism comprises a backstitch electromagnet arranged on the head of the sewing machine and a main transmission shaft arranged on the right side of the backstitch electromagnet, the lower end face of the backstitch electromagnet is fixedly connected with a backstitch lifting connecting rod, the lower end of the backstitch lifting connecting rod is hinged with a backstitch connecting shaft, and an eccentric driving wheel is sleeved on the outer peripheral side of the front end of the main transmission shaft; the backstitch mechanism comprises a backstitch connecting rod, and the middle part of the backstitch connecting rod is hinged with the lower end of a backstitch lifting connecting rod; one side of the backstitch connecting rod body, which is close to the output end of the tooth lifting mechanism, is hinged with a backstitch crank, the upper end of the backstitch connecting rod is hinged with a needle pitch adjusting shaft, one end of the needle pitch adjusting shaft is hinged with the upper end of the backstitch connecting rod, and the other end of the needle pitch adjusting shaft is inserted with a needle pitch adjuster.
Preferably, the step feeding mechanism comprises a step feeding connecting rod, a connecting rod big end of the step feeding connecting rod is sleeved on the outer peripheral side of the eccentric driving wheel, a connecting rod small end of the step feeding connecting rod is hinged with the feeding adjusting seat group, one side, far away from the connecting rod small end of the step feeding connecting rod, of the feeding adjusting seat group is hinged with a feeding connecting rod crank, the front side of the feeding adjusting seat group is hinged with a backstitch connecting rod, the feeding connecting rod crank is hinged with the front end of the step feeding shaft, the rear end of the step feeding shaft is inserted with the feeding crank group, the upper end of the feeding crank group is hinged with a tooth frame, the upper end of the tooth frame is provided with feeding.
Preferably, the feed lifting mechanism comprises a feed lifting connecting rod, the big end of the feed lifting connecting rod is sleeved on the outer periphery of the eccentric driving wheel, the step feeding connecting rod and the feed lifting connecting rod are arranged at intervals, the small end of the feed lifting connecting rod is hinged with a feed lifting connecting rod crank, and the front end of the feed lifting shaft is inserted on the feed lifting connecting rod crank; the step-sending connecting rod is arranged at the front end of the tooth-lifting connecting rod; the rear end of the feed lifting shaft is inserted with a feed lifting crank, and the upper end of the feed lifting crank is hinged with the feed lifting frame.
Preferably, a protruding shaft is arranged on the backstitch crank, a groove corresponding to the protruding shaft is formed in the backstitch connecting rod, the protruding shaft of the backstitch crank is inserted into the groove of the backstitch connecting rod, the backstitch crank is hinged to one side, close to the output end of the tooth lifting mechanism, of the backstitch connecting rod body, and the middle of the backstitch connecting rod is connected with the lower end of the backstitch lifting connecting rod through the backstitch connecting rod.
Preferably, the needle pitch adjuster is provided with a needle pitch adjusting knob.
Preferably, the backstitch crank is provided with a backstitch wrench group.
Preferably, the small connecting rod head of the step-feeding connecting rod is connected with the feeding adjusting seat group through a connecting rod pin.
Preferably, the feeding connecting rod crank is connected with the feeding adjusting seat group through the step feeding crank pin.
Preferably, the connecting rod small end of the lifting tooth connecting rod is connected with the lifting tooth connecting rod crank through a piston pin.
Preferably, the length range of the lifting tooth connecting rod is 191.7-192.3mm, and the length range of the walking connecting rod is 184.3-184.7 mm.
Compared with the prior art, the invention has the beneficial effects that: by arranging the backstitch electromagnet, the backstitch lifting connecting rod and the backstitch connecting shaft, the backstitch connecting rod can be automatically lifted, the angle of the feeding adjusting seat group is changed, the operation is convenient and fast, and the convenience of the invention is greatly improved; when the backstitch adjusting device is used, the backstitch requirement can be met only by adjusting the needle pitch adjuster, and convenience is provided for later maintenance; by arranging the backstitch connecting rod, the requirement on machining precision is lowered, and the cost is also lowered; the needle pitch regulator and the feeding adjusting seat group are connected through the backstitch connecting rod to simplify the structure, reduce the friction among parts, reduce the noise, prolong the service life of the parts and reduce the backstitch working strength of an operator; the invention simplifies the original traditional backstitch connecting mode and is simple and convenient to install.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is an enlarged view of the feed shoe assembly of the present invention;
FIG. 4 is an enlarged view of the eccentric drive wheel portion of the present invention;
FIG. 5 is an enlarged view of the feed dog crank of the present invention;
FIG. 6 is an enlarged view of the backstitch wrench set and backstitch crank of the present invention.
In the figure: 1. the automatic sewing machine comprises a main transmission shaft, 3, an eccentric transmission wheel, 4, a step feeding connecting rod, 5, a tooth lifting connecting rod, 6, a backstitch wrench group, 7, a backstitch crank, 8, a tooth lifting connecting rod crank, 9, a tooth lifting shaft, 10, a tooth lifting crank, 11, a feeding adjusting seat group, 12, a feeding connecting rod crank, 13, a step feeding shaft, 14, a feeding crank group, 15, a tooth frame, 16, a feeding tooth, 17, a needle plate, 18, a backstitch electromagnet, 19, a backstitch lifting connecting rod, 20, a backstitch connecting shaft, 21, a backstitch connecting rod, 22, a needle pitch adjusting shaft, 23, a needle pitch adjuster and 24, and a needle pitch adjusting knob.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a novel automatic backstitch transmission structure of a sewing machine, which comprises a sewing machine head, a driving mechanism, a step-feeding mechanism, a tooth-lifting mechanism and a backstitch mechanism;
the driving mechanism is used for driving the step sending mechanism, the tooth lifting mechanism and the backstitch mechanism to move; the step sending mechanism and the tooth lifting mechanism are both arranged on the driving mechanism, and are arranged at intervals; the backstitch mechanism is arranged at the output end of the feed lifting mechanism; the driving mechanism comprises a backstitch electromagnet 18 arranged on the head of the sewing machine and a main transmission shaft 1 arranged on the right side of the backstitch electromagnet 18, the lower end face of the backstitch electromagnet 18 is fixedly connected with a backstitch lifting connecting rod 19, the lower end of the backstitch lifting connecting rod 19 is hinged with a backstitch connecting shaft 20, and the outer peripheral side of the front end of the main transmission shaft 1 is sleeved with an eccentric driving wheel 3; the backstitch mechanism comprises a backstitch connecting rod 21, and the middle part of the backstitch connecting rod 21 is hinged with the lower end of the backstitch lifting connecting rod 19; one side of the backstitch connecting rod 21 close to the output end of the tooth lifting mechanism is hinged with a backstitch crank 7, the upper end of the backstitch connecting rod 21 is hinged with a needle pitch adjusting shaft 22, one end of the needle pitch adjusting shaft 22 is hinged with the upper end of the backstitch connecting rod 21, and the other end of the needle pitch adjusting shaft 22 is inserted with a needle pitch adjuster 23. By arranging the backstitch electromagnet 18, the backstitch lifting connecting rod 19 and the backstitch connecting shaft 20, the backstitch connecting rod 21 can be automatically lifted, the angle of the feeding adjusting seat group 11 is changed, the operation is convenient and fast, and the convenience of the invention is greatly improved; when in use, the backstitch needle distance requirement can be met only by adjusting the needle distance adjuster 22, and convenience is provided for later maintenance; by arranging the backstitch connecting rod 21, the processing precision requirement of parts of the sewing machine is reduced, and the cost is also reduced; the needle pitch regulator 22 and the feeding adjusting seat group 11 are connected through the backstitch connecting rod 21 to simplify the structure, reduce the friction among parts, reduce the noise, prolong the service life of the parts and reduce the backstitch working strength of an operator; the invention simplifies the original traditional backstitch connecting mode, is simple and convenient to install and greatly improves the convenience of the invention.
In this embodiment, the step feeding mechanism includes a step feeding connecting rod 4, a connecting rod big end of the step feeding connecting rod 4 is sleeved on an outer peripheral side of the eccentric driving wheel 3, a connecting rod small end of the step feeding connecting rod 4 is hinged to a feeding adjusting seat group 11, a feeding connecting rod crank 12 is hinged to one side, away from the connecting rod small end of the step feeding connecting rod 4, of the feeding adjusting seat group 11, a backstitch connecting rod 21 is hinged to the front side of the feeding adjusting seat group 11, the feeding connecting rod crank 12 is hinged to the front end of the step feeding shaft 13, a feeding crank group 14 is inserted into the rear end of the step feeding shaft 13, a tooth frame 15 is hinged to the upper end of the feeding crank group 14, a feeding tooth 16 is arranged at the upper end of the tooth frame 15. The feeding adjusting seat group 11 and the feeding crank group 14 are in the prior art, the connecting rod crank 12 drives the feeding shaft 13 to rotate, the feeding shaft 13 drives the tooth frame 15 to rotate through the feeding crank group 14, the tooth frame 15 drives the feeding teeth 16 to move, the feeding teeth 16 drive the needle plate 17 to move, the needle plate 17 is positioned, and the practicability of the invention is further improved.
In the embodiment, the feed lifting mechanism comprises a feed lifting connecting rod 5, a connecting rod big end of the feed lifting connecting rod 5 is sleeved on the outer peripheral side of the eccentric driving wheel 3, the step conveying connecting rod 4 and the feed lifting connecting rod 5 are arranged at intervals, a connecting rod small end of the feed lifting connecting rod 5 is hinged with a feed lifting connecting rod crank 8, and the front end of a feed lifting shaft 9 is inserted on the feed lifting connecting rod crank 8; the step-sending connecting rod 4 is arranged at the front end of the tooth-lifting connecting rod 5; a feed lifting crank 10 is inserted at the rear end of the feed lifting rock shaft 9, and the upper end of the feed lifting crank 10 is hinged with a feed lifting rock frame 15.
In the embodiment, the backstitch crank 7 is provided with a convex shaft, the backstitch connecting rod 21 is provided with a groove corresponding to the convex shaft, the convex shaft of the backstitch crank 7 is inserted into the groove of the backstitch connecting rod 21, the backstitch crank 7 is hinged to one side, close to the output end of the feed lifting mechanism, of the backstitch connecting rod 21, the middle of the backstitch connecting rod 21 is connected with the lower end of the backstitch lifting connecting rod 19 through the backstitch connecting shaft 20, and therefore the practicability of the lifting mechanism is further improved.
In this embodiment, the needle pitch adjuster 23 is provided with the needle pitch adjusting knob 24, and the needle pitch adjusting knob 24 is used to adjust the angle of the needle pitch adjuster 23, change the center distance of the backstitch connecting rod 21 through the needle pitch adjusting shaft 22, and then pull the feeding adjusting seat assembly 11 to change the angle, thereby completing the adjustment of the backstitch needle pitch, and further improving the practicability of the present invention.
In the embodiment, the backstitch crank 7 is provided with the backstitch wrench group 6, and manual backstitch operation is facilitated by the backstitch wrench group 6, so that the backstitch device is convenient to operate, the backstitch quality is ensured, and the practicability of the backstitch device is further improved.
In this embodiment, the small connecting rod end of the step connecting rod 4 is connected with the feeding adjusting seat group 11 through a connecting rod pin, so that the practicability of the invention is further improved.
In this embodiment, the feeding connecting rod crank 12 is connected with the feeding adjusting seat group 11 through the feeding crank pin, so that the practicability of the invention is further improved.
In the embodiment, the connecting rod small end of the lifting tooth connecting rod 5 is connected with the lifting tooth connecting rod crank 8 through the piston pin, so that the practicability of the invention is further improved.
In the embodiment, the length range of the tooth lifting connecting rod 5 is 191.7-192.3mm, the length range of the step conveying connecting rod 4 is 184.3-184.7mm, and when the length sizes of the tooth lifting connecting rod 5 and the step conveying connecting rod 4 are in the range, the transmission effect of the invention is best, and the practicability of the invention is further improved.
The working principle of the invention is that a main transmission shaft 1 drives an eccentric transmission wheel 3 to rotate, the eccentric transmission wheel 3 drives a step feeding connecting rod 4 to rotate, the step feeding connecting rod 4 drives a feeding connecting rod crank 12 to rotate through a feeding adjusting seat group 11, the connecting rod crank 12 drives a step feeding shaft 13 to rotate, the step feeding shaft 13 drives a tooth frame 15 to rotate through a feeding crank group 14, the tooth frame 15 drives a feeding tooth 16 to move, and the feeding tooth 16 drives a needle plate 17 to move, so that the positioning of the needle plate 17 is completed;
the eccentric transmission wheel 3 drives the feed lifting connecting rod 5 to rotate, the feed lifting connecting rod 5 drives the feed lifting shaft 9 to rotate through the feed lifting connecting rod crank 8, the feed lifting shaft 9 drives the feed rack 15 to rotate through the feed lifting crank 10, the feed rack 15 drives the feed dog 16 to move, and the feed dog 16 drives the needle plate 17 to move, so that feeding is completed;
when the backstitch electromagnet is electrified, the backstitch electromagnet 18 is attracted to drive the backstitch lifting connecting rod 19 to move upwards, the backstitch lifting connecting rod 19 drives the backstitch connecting rod 21 to move upwards through the backstitch connecting shaft 20, the backstitch connecting rod 21 pulls the feeding adjusting seat group 11 to change the angle, and the feeding adjusting seat group 11 drives the feeding connecting rod crank 12 to move; when the backstitch electromagnet is powered off, the magnetism of the backstitch electromagnet 18 disappears, the backstitch lifting connecting rod 19 moves downwards, and the backstitch connecting rod 21 also moves downwards; in the process of powering on and off the backstitch electromagnet, backstitch is finished;
the stitch length adjusting knob 24 is manually adjusted, so that the stitch length adjusting knob 24 is pushed to the stitch length adjuster 23 in a forward and backward mode through thread rotation, the center distance of the backstitch connecting rod 21 is changed after the angle is adjusted, then the feeding adjusting seat group 11 is pulled to change the angle, and the adjustment and the change of the stitch length are completed; the stitch length adjusting shaft 22 is an eccentric shaft and has the functions of connecting the stitch length adjuster 23 and the backstitch connecting rod 21 and compensating the consistent stitch length of the front and back stitches, and the feeding adjusting seat group 11 drives the feeding connecting rod crank 12 to move to finish backstitch.
In the description of the present invention, it is to be understood that the terms "left", "right", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. The utility model provides a novel automatic backstitch transmission structure of sewing machine which characterized in that: comprises a sewing machine head, a driving mechanism, a step-delivering mechanism, a tooth-lifting mechanism and a backstitch mechanism; the driving mechanism is used for driving the step sending mechanism, the tooth lifting mechanism and the backstitch mechanism to move; the step sending mechanism and the tooth lifting mechanism are both arranged on the driving mechanism, and are arranged at intervals; the backstitch mechanism is arranged at the output end of the feed lifting mechanism; the driving mechanism comprises a backstitch electromagnet (18) arranged on the head of the sewing machine and a main transmission shaft (1) arranged on the right side of the backstitch electromagnet (18), the lower end face of the backstitch electromagnet (18) is fixedly connected with a backstitch lifting connecting rod (19), the lower end of the backstitch lifting connecting rod (19) is hinged with a backstitch connecting shaft (20), and an eccentric driving wheel (3) is sleeved on the outer peripheral side of the front end of the main transmission shaft (1); the backstitch mechanism comprises a backstitch connecting rod (21), and the middle part of the backstitch connecting rod (21) is hinged with the lower end of a backstitch lifting connecting rod (19); one side of the backstitch connecting rod (21) close to the output end of the tooth lifting mechanism is hinged with a backstitch crank (7), the upper end of the backstitch connecting rod (21) is hinged with a needle pitch adjusting shaft (22), one end of the needle pitch adjusting shaft (22) is hinged with the upper end of the backstitch connecting rod (21), and the other end of the needle pitch adjusting shaft (22) is inserted with a needle pitch adjuster (23).
2. The novel automatic backstitch transmission structure of the sewing machine according to claim 1, characterized in that: the step feeding mechanism comprises a step feeding connecting rod (4), a connecting rod big end of the step feeding connecting rod (4) is sleeved on the outer peripheral side of an eccentric driving wheel (3), a connecting rod small end of the step feeding connecting rod (4) is hinged to a feeding adjusting seat group (11), one side, far away from the step feeding connecting rod (4), of the feeding adjusting seat group (11) is hinged to a feeding connecting rod crank (12), the front side of the feeding adjusting seat group (11) is hinged to a backstitch connecting rod (21), the feeding connecting rod crank (12) is hinged to the front end of a step feeding shaft (13), the feeding crank group (14) is inserted into the rear end of the step feeding shaft (13), a tooth frame (15) is hinged to the upper end of the feeding crank group (14), feeding teeth (16) are arranged at the upper end of the tooth frame (15), and a needle plate (17) is arranged at the upper.
3. The novel automatic backstitch transmission structure of the sewing machine according to claim 2, characterized in that: the lifting tooth mechanism comprises a lifting tooth connecting rod (5), the connecting rod big end of the lifting tooth connecting rod (5) is sleeved on the peripheral side of the eccentric driving wheel (3), the step conveying connecting rod (4) and the lifting tooth connecting rod (5) are arranged at intervals, the connecting rod small end of the lifting tooth connecting rod (5) is hinged with a lifting tooth connecting rod crank (8), and the front end of a lifting tooth shaft (9) is inserted into the lifting tooth connecting rod crank (8); the step-sending connecting rod (4) is arranged at the front end of the tooth-lifting connecting rod (5); a feed lifting crank (10) is inserted at the rear end of the feed lifting shaft (9), and the upper end of the feed lifting crank (10) is hinged with a feed lifting frame (15).
4. The novel automatic backstitch transmission structure of the sewing machine according to claim 3, characterized in that: the backstitch crank (7) is provided with a convex shaft, the backstitch connecting rod (21) is provided with a groove corresponding to the convex shaft, the convex shaft of the backstitch crank (7) is inserted in the groove of the backstitch connecting rod (21), the backstitch crank (7) is hinged to one side of the rod body of the backstitch connecting rod (21) close to the output end of the tooth lifting mechanism, and the middle part of the backstitch connecting rod (21) is connected with the lower end of the backstitch lifting connecting rod (19) through a backstitch connecting shaft (20).
5. The novel automatic backstitch transmission structure of the sewing machine according to claim 4, characterized in that: the needle pitch regulator (23) is provided with a needle pitch regulating knob (24).
6. The novel automatic backstitch transmission structure of the sewing machine according to claim 5, characterized in that: a backstitch wrench group (6) is arranged on the backstitch crank (7).
7. The novel automatic backstitch transmission structure of the sewing machine according to claim 6, characterized in that: the small connecting rod head of the step-sending connecting rod (4) is connected with the feeding adjusting seat group (11) through a connecting rod pin.
8. The novel automatic backstitch transmission structure of the sewing machine according to claim 7, characterized in that: the feeding connecting rod crank (12) is connected with the feeding adjusting seat group (11) through a feeding crank pin.
9. The novel automatic backstitch transmission structure of the sewing machine according to claim 8, characterized in that: the small end of the connecting rod of the feed lifting connecting rod (5) is connected with a feed lifting connecting rod crank (8) through a piston pin.
10. The novel automatic backstitch transmission structure of the sewing machine according to claim 9, characterized in that: the length range of the feed lifting connecting rod (5) is 191.7-192.3mm, and the length range of the step conveying connecting rod (4) is 184.3-184.7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011349847.2A CN112411035A (en) | 2020-11-26 | 2020-11-26 | Novel automatic backstitch transmission structure of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011349847.2A CN112411035A (en) | 2020-11-26 | 2020-11-26 | Novel automatic backstitch transmission structure of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112411035A true CN112411035A (en) | 2021-02-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011349847.2A Pending CN112411035A (en) | 2020-11-26 | 2020-11-26 | Novel automatic backstitch transmission structure of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112411035A (en) |
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2020
- 2020-11-26 CN CN202011349847.2A patent/CN112411035A/en active Pending
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