CN113638138A - Mechanism for forward and reverse cloth feeding of sewing machine and sewing machine - Google Patents

Mechanism for forward and reverse cloth feeding of sewing machine and sewing machine Download PDF

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Publication number
CN113638138A
CN113638138A CN202111040864.2A CN202111040864A CN113638138A CN 113638138 A CN113638138 A CN 113638138A CN 202111040864 A CN202111040864 A CN 202111040864A CN 113638138 A CN113638138 A CN 113638138A
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China
Prior art keywords
cloth feeding
cam
transmission shaft
sewing machine
crown gear
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Pending
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CN202111040864.2A
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Chinese (zh)
Inventor
胡大春
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Individual
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Individual
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Priority to CN202111040864.2A priority Critical patent/CN113638138A/en
Publication of CN113638138A publication Critical patent/CN113638138A/en
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
    • 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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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

The embodiment of the application belongs to the technical field of sewing machines, and relates to a mechanism for forward cloth feeding and reverse cloth feeding of a sewing machine and the sewing machine, wherein a crown gear cam comprises a cam part and a crown gear part, a transmission shaft through hole is formed in a support plate, a cloth feeding tooth swing frame is provided with a hinge end and a movable end, and a cloth feeding cam is fixed on a transmission shaft; the feed dog is connected with the driving ring through the movable end of the feed dog swing frame; the driving ring is also connected with a sliding groove block, and the sliding groove block is connected with a groove-directional reset piece; the transmission shaft penetrates through the driving ring and the transmission shaft through hole, and the cloth feeding cam is in line contact with two inner side walls of the driving ring and is used for driving the cloth feeding teeth to move back and forth; one end of the transmission shaft penetrating through the through hole of the transmission shaft is connected with a crown gear cam, and the cam part of the crown gear cam is contacted with the cloth feeding dental floss and is used for driving the cloth feeding dental floss to move up and down; wherein, the included angle formed by the eccentric high points of the crown gear cam and the cloth feeding cam in the radial direction is 60-120 degrees. The mechanism of forward work feed and reverse work feed that this application provided, the structure is small and exquisite, can realize the backstitch sewing function on domestic small-size sewing machine.

Description

Mechanism for forward and reverse cloth feeding of sewing machine and sewing machine
Technical Field
The application relates to the technical field of sewing machines, in particular to a mechanism for forward cloth feeding and reverse cloth feeding of a sewing machine and the sewing machine.
Background
The domestic sewing machine mainly takes the market with the advantages of small size and portability. However, the existing small-sized home sewing machine has no back sewing function, or the sewing machine with the back sewing function has a complex structure, cannot be really small and has a high price. Therefore, a new technology is needed to solve the problem that the small-sized domestic sewing machine has no reverse sewing function.
Disclosure of Invention
An object of the embodiments of the present application is to provide a mechanism for forward and reverse feeding of a cloth for a sewing machine and a sewing machine, so as to solve the above problems in the background art.
In order to solve the above technical problem, an embodiment of the present application provides a mechanism for forward feeding and backward feeding of a sewing machine, which adopts the following technical solutions:
the mechanism for forward and reverse cloth feeding comprises: the cloth feeding mechanism comprises a transmission mechanism, a bracket mechanism and a cloth feeding mechanism; wherein the content of the first and second substances,
the transmission mechanism includes: a crown gear cam, a cloth feeding cam and a transmission shaft; the support mechanism includes: a mounting plate; the cloth feeding mechanism comprises: the cloth feeding device comprises a cloth feeding tooth, a sliding groove block, a driving ring and a cloth feeding tooth swing frame; the crown gear cam comprises a cam part and a crown gear part, a transmission shaft through hole is formed in the support plate, the cloth feeding tooth swing frame is provided with a hinge end and a movable end, and a cloth feeding cam is fixed on the transmission shaft;
the feed dog is hinged with the driving ring through a movable end of the feed dog swing frame; the driving ring is also connected with a sliding groove block, and the sliding groove block is connected with a groove-directional reset piece; the transmission shaft penetrates through the driving ring and the transmission shaft through hole, and the cloth feeding cam is in line contact with two inner side walls of the driving ring and is used for driving the cloth feeding teeth to move back and forth; one end of the transmission shaft penetrating through the through hole of the transmission shaft is connected with the crown gear cam, and the cam part of the crown gear cam is in contact with the feed dental floss and is used for driving the feed dental floss to move up and down;
wherein, the included angle formed by the eccentric high points of the crown gear cam and the cloth feeding cam in the radial direction is 60-120 degrees.
Further, the transmission mechanism further comprises: and the driving wheel is arranged at the power receiving end of the transmission shaft.
Further, the support mechanism further comprises: and the transmission shaft rotates on the bearing seat.
Furthermore, a cloth feeding tooth limiting plate, a sliding groove block mounting position and a swinging support mounting position are arranged on the support plate, wherein a plurality of limiting columns are arranged at the sliding groove block mounting position.
Further, the transmission mechanism includes: an elastic stretching piece and a reset torsion spring;
one end of the elastic stretching piece is connected with the cloth feeding teeth, and the other end of the elastic stretching piece is fixed on the support plate;
the back side of the sliding groove block is provided with a movable column, and the reset torsion spring is sleeved on the movable column.
Further, one side of the cloth feeding cam, which is far away from the driving ring, is provided with a baffle.
In order to solve the above technical problem, an embodiment of the present application provides a sewing machine, which adopts the following technical scheme:
the sewing machine comprises the mechanism for forward cloth feeding and reverse cloth feeding of the sewing machine.
Compared with the prior art, the embodiment of the application mainly has the following beneficial effects:
the utility model provides a mechanism and sewing machine that is used for sewing machine's forward work feed and reverse work feed is provided with drive mechanism, gimbal mechanism, work feed mechanism, drive mechanism includes: a crown gear cam, a cloth feeding cam and a transmission shaft; the support mechanism includes: a mounting plate; the cloth feeding mechanism comprises: the cloth feeding device comprises a cloth feeding tooth, a sliding groove block, a driving ring and a cloth feeding tooth swing frame; the support mechanism can be a support plate, a sliding groove block mounting position and a swing support mounting position are arranged on the support plate and used for being connected with a driving ring, a cloth feeding cam is driven through a transmission shaft to control the front and back movement of a cloth feeding tooth, a crown gear cam is driven through the transmission shaft to control the up and down movement of the cloth feeding tooth, and the inclined direction of a sliding groove of the sliding groove block is controlled to adjust the cloth feeding tooth from front to back or from back to front to move, so that the normal sewing function of the forward cloth feeding and the reverse cloth feeding reverse sewing function of the sewing machine are realized. The mechanism for forward cloth feeding and reverse cloth feeding of the sewing machine can enable the size of the whole mechanism for forward cloth feeding and reverse cloth feeding to be not more than 10 x 8 x 6cm, achieves the reverse sewing function of the small and miniaturized sewing machine, and is beneficial to popularization of small and miniaturized products with the structure because the combined mechanism of the whole mechanism for forward cloth feeding and reverse cloth feeding is simple and low in cost.
Drawings
In order to more clearly illustrate the solution of the present application, the drawings needed for describing the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is an exploded view of a forward and reverse feed mechanism for a sewing machine according to one embodiment of the present application;
FIG. 2 is an exploded view of a forward and reverse feed mechanism for a sewing machine according to another embodiment of the present application;
FIG. 3 is a schematic view of a forward and reverse feed mechanism for a sewing machine according to an embodiment of the present application;
FIG. 4 is a schematic view of a forward feed threading operation of a forward feed and a reverse feed mechanism for a sewing machine according to an embodiment of the present application;
FIG. 5 is a schematic view of the reverse sewing feed dog operation of the forward and reverse feed mechanism for a sewing machine according to an embodiment of the present application;
FIG. 6 is a schematic view of a mechanism of a sewing machine according to an embodiment of the present application;
fig. 7 is a schematic view of a mechanism of a sewing machine according to another embodiment of the present application.
Reference numerals: 1-crown gear cam, 2-cloth feeding cam, 3-transmission shaft, 4-bracket plate, 5-cloth feeding teeth, 6-sliding groove block, 7-driving ring, 8-cloth feeding teeth swinging frame, 9-transmission wheel, 10-bearing seat, 11-cloth feeding teeth limiting plate, 12-limiting column, 13-elastic stretching piece, 14-reset torsion spring, 15-movable column and 16-blocking piece.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.
Reference herein to "an embodiment" means that a particular feature, mechanism, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, a mechanism for forward and reverse feeding of a sewing machine according to a first embodiment of the present application is shown, and the following technical solutions are adopted:
the mechanism for forward and reverse cloth feeding comprises: the cloth feeding mechanism comprises a transmission mechanism, a bracket mechanism and a cloth feeding mechanism; wherein the content of the first and second substances,
the transmission mechanism includes: a crown gear cam 1, a cloth feeding cam 2 and a transmission shaft 3; the support mechanism includes: a bracket plate 4; the cloth feeding mechanism comprises: the cloth feeding device comprises a cloth feeding tooth 5, a sliding groove block 6, a driving ring 7 and a cloth feeding tooth swing frame 8; the crown gear cam 1 comprises a cam part and a crown gear part, a through hole of a transmission shaft 3 is arranged on the support plate 4, a swing frame 8 of the feed dog is provided with a hinge end and a movable end, and a feed cam 2 is fixed on the transmission shaft 3;
the feed dog is hinged with the driving ring 7 through the movable end of the feed dog swing frame; the driving ring 7 is also connected with a sliding groove block 6, and the sliding groove block 6 is connected with a groove reset piece; the transmission shaft 3 penetrates through the driving ring 7 and a through hole of the transmission shaft 3, and the cloth feeding cam 2 is in line contact with two inner sides of an inner ring of the driving ring 7 and is used for driving the cloth feeding teeth to move back and forth; one end of the transmission shaft 3 penetrating through the transmission shaft through hole is connected with the crown gear cam 1; the cam part of the crown gear cam 1 is in line contact with the cloth feeding teeth 5 and is used for driving the cloth feeding teeth 5 to move up and down;
wherein, the included angle formed by the eccentric high points of the crown gear cam 1 and the cloth feeding cam 2 in the radial direction is 60-120 degrees.
In this embodiment, the movable end of the swing frame 8 refers to an end capable of performing a circular or arc motion around the hinge end, the movable end may be provided with a front connection node and a rear connection node, which are respectively used for connecting the driving end of the feed dog 5 and the driving ring 7, and the arrangement of the swing frame 8 drives the feed dog 5 to perform a front-and-rear motion. The driving end of the feed dog 5 is connected with the driving ring 7 through the movable end, and a clearance hole may be formed in the bracket plate, or a gap may be formed in the bracket plate as a space for the feed dog 5 to be connected with the driving end and move. The cloth feeding cam 2 and the driving ring 7 are in inner ring line contact to form a kinematic pair, and the cam part of the crown gear cam 1 and the cloth feeding teeth 5 are in line contact to form a kinematic pair. In some embodiments, the size of the whole forward cloth feeding and reverse cloth feeding mechanism does not exceed 10 × 8 × 6cm, so that the reverse sewing function of the miniaturized sewing machine is realized, and meanwhile, the combined structure of the whole forward cloth feeding and reverse cloth feeding mechanism is simple, the cost is relatively low, and the popularization of miniaturized products with the structure is facilitated.
To the above-mentioned mechanism for forward feeding and reverse feeding of a sewing machine, the present application further provides a second embodiment, wherein the transmission mechanism further comprises: and the transmission wheel 9, wherein the transmission wheel 9 is arranged at the power receiving end of the transmission shaft 3.
In this embodiment, the driving wheel 9 is used for transmitting the power of the motor to the transmission shaft 3 to realize the operation. In some embodiments, the transmission wheel 9 and the transmission shaft 3 can be fixedly connected or detachably connected.
To the above-mentioned mechanism for forward work feed and reverse work feed of sewing machine, the present application further provides a third embodiment, wherein the holder mechanism further comprises: and the bearing seat 10 is provided with an inner hole of the bearing seat 10 on the transmission shaft 3 for rotation.
To the above-mentioned mechanism that is used for sewing machine's forward work feed and reverse work feed, this application still provides the fourth embodiment, wherein, be equipped with feed dog limiting plate 11, spout piece 6 installation position and swing bracket installation position on the mounting panel 4, wherein, spout piece 6 installation position is equipped with a plurality of spacing posts 12.
In this embodiment, the feed dog limiting plate 11 may limit the deviation or play of the feed dog 5 to the outside of the feed dog limiting plate 11, so as to increase the operation stability of the apparatus. The mounting position of the sliding groove block 6 is used for mounting the sliding groove block 6, wherein the mounting position of the sliding groove block 6 can be provided with a plurality of limiting columns 12 for limiting the inclination angle of the sliding groove block 6, in fact, the inclination angle of the sliding groove block 6 is a better angle in the range of 30-60 degrees, and the sliding groove block 6 can be tilted forwards or backwards, and the angle of the sliding groove block 6 can be adjusted, which is not limited in this embodiment. In addition, the limiting column 12 may have other functions, which will be described in the following embodiments. The swing bracket mounting position is used for mounting the feed dog swing bracket 8. The swing bracket mounting position is used for connecting the hinge end of the feed dog swing bracket 8 so as to enable the feed dog swing bracket to move around the hinge end. It should be noted that, in the preceding embodiment, the mounting position of the chute block 6 and the mounting position of the swing bracket may be set at other positions of the sewing machine instead of the support plate 4, so long as the working process of the mechanism for forward and reverse feeding of the preamble can be realized, the effect of forward and reverse feeding can still be achieved; relatively speaking, the mounting position of the chute block 6 and the mounting position of the swing bracket can be also not arranged on the bracket plate 4, and the advantage of the arrangement on the bracket plate 4 is that the arrangement of the whole reverse cloth feeding structure is more compact, the structure is more reasonable, and the occupied space is smaller.
In view of the above-mentioned mechanism for forward and reverse feeding of a sewing machine, the present application also provides a fifth embodiment, wherein the transmission mechanism comprises: an elastic stretching piece 13 and a reset torsion spring 14;
one end of the elastic stretching piece 13 is connected with the cloth feeding teeth 5, and the other end of the elastic stretching piece is fixed on the support plate 4;
the back side of the sliding groove block 6 is provided with a movable column 15, and the reset torsion spring 14 is sleeved on the movable column 15.
In this embodiment, the elastic stretching member 13 may be a member having elastic deformation, such as a spring or a rubber band. In the present application, a spring is preferably used as the tensile stretching member 13, and the elastic stretching member 13 is provided to pull the feed dog 5 to be always in linear contact with the cam portion of the crown cam, so that the cam drives the feed dog to move up and down. The reset torsion spring 14 is used for positioning the chute direction of the chute block 6, when the reset torsion spring 14 is arranged, one force arm is abutted to the limiting column 12, the limiting column 12 is used as a fulcrum of the force arm, the other force arm is abutted to the back side of the chute block 6 (the back side of the chute block 6 can be provided with a structure for connecting the force arms, such as a convex column, and the like), under the elastic action of the reset torsion spring 14, the chute is fixed to be inclined in one direction (forwards inclined or backwards inclined), for example, the chute is backwards inclined so that the movement track of the cloth feeding tooth is from front to back to realize the forward cloth feeding function (as shown in fig. 4); when an external acting force (such as a force F in figure 3) is applied to the chute block 6, the chute correspondingly turns to the other direction (namely inclines forwards), so that the motion track of the feed dog is changed from front to back to front to realize the reverse feed function (such as figure 5); after the acting force (shown as force F in figure 3) applied to the chute block 6 is cancelled, the chute returns to the original inclined direction under the elastic action of the reset torsion spring 14, and the function of forward cloth feeding is realized.
In view of the above-described mechanism for forward and reverse feeding of a sewing machine, the present application also provides a sixth embodiment in which a stopper piece 16 is provided on a side of the feed cam 2 facing away from the drive ring 7.
In this embodiment, the stopper piece 16 is provided to limit the driving ring 7 and prevent the driving ring 7 from deviating from the moving track of the cloth feeding cam 2 and the chute block 6.
The seventh embodiment of the present application provides a sewing machine, which adopts the following technical scheme:
the sewing machine comprises the mechanism for forward cloth feeding and reverse cloth feeding of the sewing machine.
In the embodiment, referring to fig. 1 to 5 again, when the sewing machine is in operation, on one hand, when the chute block is tilted backward, and the driving wheel 9 is subjected to a driving force to rotate in a fixed direction, the transmission shaft 3 fixedly connected with the transmission wheel rotates along with the driving force, so as to drive the cloth feeding cam 2 and the crown gear cam 1 fixed on the transmission shaft 3 to synchronously rotate; the driving ring 7 reciprocates along the groove of the chute block 6 inclined backwards at a certain angle under the driving of the cloth feeding cam 9, and then the driving ring 7 pushes the cloth feeding teeth swinging frame 8 rotationally connected with the driving ring to swing back and forth at the central point of the hinged end, so that the cloth feeding teeth 5 rotationally connected with the cloth feeding teeth swinging frame 8 are driven to move back and forth. On the other hand, the feed dog 5 is simultaneously under the pulling force of the elastic stretching piece 13, the bottom of the feed dog is in line contact with the cam part of the crown gear cam 1, and therefore the feed dog moves up and down under the connection of the crown gear cam 1 and the transmission shaft 3. Because the high points of the two cams form a certain angle in the radial direction, namely the high points are sequentially shown, the action is specifically shown in that the motion track of the top position of the cloth feeding tooth 5 runs from front to top to back, thereby achieving the purpose of feeding cloth backwards and feeding cloth forwards and sewing; after the cloth feeding device runs to the end point of the track, the cloth feeding device runs from back to bottom to front to complete a cycle, and the driving wheel 9 continuously rotates, so that the cloth feeding teeth 5 repeatedly move to achieve the aim of continuously and forwardly feeding cloth.
In this embodiment, referring to fig. 1 to 5 again, when the sewing machine is in operation, when the chute block is tilted forward under the action of an external force, and the driving wheel 9 is subjected to a driving force to rotate in a fixed direction, the transmission shaft 3 fixedly connected with the transmission wheel rotates along with the driving force, so as to drive the cloth feeding cam 2 and the crown gear cam 1 fixed on the transmission shaft 3 to synchronously rotate; thereby driving the driving ring 7 to reciprocate along the sliding groove block 6 inclined backwards at a certain angle under the driving of the cloth feeding cam 9, and then the driving ring 7 pushes the cloth feeding teeth swinging rack 8 rotationally connected with the driving ring to swing back and forth at the central point of the hinged end, thereby driving the cloth feeding teeth 5 rotationally connected with the driving ring to move back and forth. On the other hand, the feed dog 5 is simultaneously under the pulling force of the elastic stretching piece 13, the bottom of the feed dog is in line contact with the cam part of the crown gear cam 1, and therefore the feed dog moves up and down under the connection of the crown gear cam 1 and the transmission shaft 3. Because the high points of the two cams form a certain angle in the radial direction, namely the high points are sequentially displayed, the action is specifically represented as that the movement track of the top position of the cloth feeding tooth 5 moves from back to top to front, thereby achieving the purpose of forward and reverse cloth feeding and reverse sewing; after the cloth feeding device runs to the end point of the track, the cloth feeding device continues to the next cycle from front to bottom to back, and the driving wheel 9 continuously rotates, so that the cloth feeding teeth 5 move repeatedly to achieve the aim of continuous reverse cloth feeding.
Fig. 6-7 show the application of the embodiments one to six in combination of the mechanism for forward and reverse feed of a sewing machine to a small-sized sewing machine.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims (7)

1. A mechanism for forward and reverse feed of a sewing machine, comprising: the cloth feeding mechanism comprises a transmission mechanism, a bracket mechanism and a cloth feeding mechanism; wherein the content of the first and second substances,
the transmission mechanism includes: a crown gear cam, a cloth feeding cam and a transmission shaft; the support mechanism includes: a mounting plate; the cloth feeding mechanism comprises: the cloth feeding device comprises a cloth feeding tooth, a sliding groove block, a driving ring and a cloth feeding tooth swing frame; the crown gear cam comprises a cam part and a crown gear part, a transmission shaft through hole is formed in the support plate, the cloth feeding tooth swing frame is provided with a hinge end and a movable end, and a cloth feeding cam is fixed on the transmission shaft;
the feed dog is hinged with the driving ring through a movable end of the feed dog swing frame; the driving ring is also connected with a sliding groove block, and the sliding groove block is connected with a groove-directional reset piece; the transmission shaft penetrates through the driving ring and the transmission shaft through hole, and the cloth feeding cam is in line contact with two inner side walls of the driving ring and is used for driving the cloth feeding teeth to move back and forth; one end of the transmission shaft penetrating through the through hole of the transmission shaft is connected with the crown gear cam, and the cam part of the crown gear cam is in contact with the feed dental floss and is used for driving the feed dental floss to move up and down;
wherein, the included angle formed by the eccentric high points of the crown gear cam and the cloth feeding cam in the radial direction is 60-120 degrees.
2. The mechanism for forward and reverse feed of a sewing machine as set forth in claim 1, wherein the transmission mechanism further comprises: and the driving wheel is arranged at the power receiving end of the transmission shaft.
3. The mechanism for forward and reverse feed of a sewing machine as claimed in claim 1, wherein said carriage mechanism further comprises: and the transmission shaft rotates on the bearing seat.
4. The mechanism for feeding cloth in a forward direction and a backward direction of a sewing machine as claimed in claim 1, wherein the support plate is provided with a feed dog limiting plate, a chute block mounting position and a swing support mounting position, and wherein the chute block mounting position is provided with a plurality of limiting posts.
5. The mechanism for forward and reverse feed of a sewing machine as claimed in claim 1, wherein said transmission mechanism comprises: an elastic stretching piece and a reset torsion spring;
one end of the elastic stretching piece is connected with the cloth feeding teeth, and the other end of the elastic stretching piece is fixed on the support plate;
the back side of the sliding groove block is provided with a movable column, and the reset torsion spring is sleeved on the movable column.
6. The mechanism for feeding cloth in a forward direction and a reverse direction of a sewing machine as claimed in claim 1, wherein a side of said cloth feed cam facing away from said drive ring is provided with a stopper.
7. A sewing machine characterized in that it comprises a mechanism for forward and reverse feed of a sewing machine according to any one of claims 1 to 6.
CN202111040864.2A 2021-09-07 2021-09-07 Mechanism for forward and reverse cloth feeding of sewing machine and sewing machine Pending CN113638138A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111040864.2A CN113638138A (en) 2021-09-07 2021-09-07 Mechanism for forward and reverse cloth feeding of sewing machine and sewing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111040864.2A CN113638138A (en) 2021-09-07 2021-09-07 Mechanism for forward and reverse cloth feeding of sewing machine and sewing machine

Publications (1)

Publication Number Publication Date
CN113638138A true CN113638138A (en) 2021-11-12

Family

ID=78425215

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111040864.2A Pending CN113638138A (en) 2021-09-07 2021-09-07 Mechanism for forward and reverse cloth feeding of sewing machine and sewing machine

Country Status (1)

Country Link
CN (1) CN113638138A (en)

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