A structure for controlling multiple sewing actions by one motor and a sewing machine

Abstract

This application relates to a sewing machine that controls multiple sewing actions with one motor, specifically to the technical field of sewing machine manufacturing. It includes a motor, a presser foot lifting mechanism, a reverse sewing mechanism, and a thread cutting mechanism. The motor comprises an electromagnet and / or a relay, an encoder, a front output shaft, and a rear output shaft. The front output shaft of the motor controls the thread cutting mechanism, and the rear output shaft of the motor controls the presser foot lifting mechanism and the reverse sewing mechanism. A presser foot lifting cam and a reverse sewing cam are fixed on the rear output shaft. The rear output shaft of the motor passes through the electromagnet, and a tangent lever is fixed on the front output shaft. The front output shaft of the motor passes through the encoder. The rear output shaft of the motor repeatedly rotates forward and backward within a rotation angle to output power to achieve the reverse sewing (needle pitch adjustment) action, and the front output shaft of the motor realizes the thread cutting action by rotating forward once within a rotation angle. This application realizes the sewing actions of reverse sewing, presser foot lifting, and thread cutting through the operation of one motor, making the structure of the sewing machine more compact and greatly reducing the production cost of the sewing machine.

Description

Technical Field

[0001] This application relates to a structure for controlling multiple sewing operations by one motor and a sewing machine, and particularly to the technical field of sewing machine manufacturing. Background Art

[0002] Existing sewing machines basically control sewing operations such as reverse sewing, presser foot, and thread cutting through electromagnets. The implementation of each function requires an electromagnet or a motor to control. Currently, there is a type of sewing machine on the market that controls the functions of presser foot, thread cutting, and reverse sewing (needle pitch adjustment) through a stepping motor. One stepping motor controls thread cutting and lifting the presser foot respectively through forward and reverse rotations, and another motor controls reverse sewing (needle pitch adjustment) independently. Such a sewing machine needs to install two stepping motors to control reverse sewing, presser foot, and thread cutting functions, increasing the manufacturing cost of the sewing machine and being more complex in production and assembly. Summary of the Invention

[0003] In view of the defects of high cost and complex production in the above-mentioned sewing machine technology, a structure for controlling multiple sewing operations by one motor according to this application is proposed. It is characterized in that it includes a motor, a presser foot lifting mechanism, a reverse sewing mechanism, and a thread cutting mechanism. The motor includes an electromagnet and an encoder. The motor has a front output shaft and a rear output shaft. An electromagnet is installed on the rear end cover of the motor. The electromagnet is connected with a sliding pin. A presser foot lifting cam and a reverse sewing cam are fixed on the rear output shaft.

[0004] The presser foot lifting mechanism includes a presser foot lifting cam and a presser foot lifting link. The presser foot lifting cam has a link groove, a front low point, a rear low point, and a sliding pin groove. The presser foot lifting link has a circular head. The front low point and the rear low point matching the presser foot lifting link are in the link groove. The sliding pin is in the sliding pin groove of the presser foot lifting cam. There is a gap between the rear output shaft and the presser foot lifting cam. The motor of the presser foot lifting mechanism outputs power through one forward and reverse rotation within the rotation angle.

[0005] The reverse sewing mechanism includes a reverse sewing cam and a reverse sewing link. The rear output shaft passes through the presser foot lifting cam and is fixedly connected to the reverse sewing cam. The reverse sewing cam has a concentric circle part one, a center hole, an arc surface part, and a concentric circle part two. An arc surface part is provided between the concentric circle part one and the concentric circle part two. The concentric circle part one and the concentric circle part two are set with the center hole as the center. The reverse sewing link has a crank abutting part. The crank abutting part at the lower end of the reverse sewing link abuts against the reverse sewing cam. The crank abutting part runs on the entire arc surface part. The motor of the reverse sewing mechanism outputs power through repeated forward and reverse rotations within the rotation angle.

[0006] An encoder is installed on the front end cover of the motor. The front output shaft passes through the encoder. The wire cutting mechanism includes a tangent curved rod and a tangent driving crank. The tangent curved rod is fixed on the front output shaft. The tangent curved rod has a crank ball. The tangent driving crank has a crank hole. The crank ball is installed in the crank hole of the tangent driving crank. The motor of the wire cutting mechanism outputs power once during a forward rotation within the rotation angle.

[0007] Further, the motor has a front output shaft and a rear output shaft located at both ends of the motor respectively. The rear output shaft of the motor controls the presser foot lifting mechanism and the reverse sewing mechanism. The front output shaft of the motor controls the wire cutting mechanism. The front output shaft of the motor of the wire cutting mechanism is connected to control the wire cutting mechanism. The motor also includes a relay.

[0008] Further, the sliding pin has a fixing plate and a first rear output shaft hole. The rear output shaft passes through the first rear output shaft hole. The first rear output shaft hole is arranged on the fixing plate. The sliding pin is connected to the fixing plate.

[0009] Further, the presser foot lifting cam also has a second rear output shaft hole. The rear output shaft is fixed on the second rear output shaft hole of the presser foot lifting cam.

[0010] Further, the center hole allows the rear output shaft to penetrate and be fixedly connected. The crank abutting portion abuts against the first concentric circle portion and the second concentric circle portion with different motions. The arc surface portion is not centered on the center hole.

[0011] Further, the reverse sewing mechanism further includes a swing seat, a feed shaft and a spring. The reverse sewing link also has a fixing hole. The fixing hole is connected to the swing seat. The swing of the swing seat drives the feed shaft to operate. The swing seat has a swing seat spring fixing rod. This application also has a machine body. A machine body spring fixing rod is arranged on the machine body. A spring is arranged between the swing seat spring fixing rod and the machine body spring fixing rod.

[0012] Further, the crank abutting portion of the reverse sewing link contacts the arc surface portion of the reverse sewing cam. The crank abutting portion abuts against the arc surface portion. The rear output shaft of the motor outputs power with different angles during one forward and reverse rotation within the rotation angle to achieve the presser foot lifting action. The motor of the wire cutting mechanism rotates reversely once within the rotation angle to achieve the wire cutting action.

[0013] Further, the tangent curved rod also has a connecting body and a front output shaft hole. The connecting body connects the crank ball and the front output shaft hole. The front output shaft hole of the tangent curved rod is fixed on the front output shaft. The tangent driving crank also has a mounting port, a fixing frame and a connecting rod fixing hole. The mounting port of the tangent driving crank allows the crank ball to be placed into the connecting body. The connecting body is connected to the fixing frame. The fixing frame is provided with a connecting rod fixing hole. The connecting rod fixing hole is connected to a fixed connecting rod.

[0014] Further, the thread cutting mechanism further includes a connecting rod, a blade, and two thread cutting arms. One end of the connecting rod is connected to the tangent driving crank, and the other end of the connecting rod is connected to the two thread cutting arms. The connecting rod drives one of the thread cutting arms connected to the blade under the push of the tangent driving crank; the connecting rod drives the thread cutting arm to push the blade to cut the thread.

[0015] Further, a sewing machine according to the present application includes a structure for controlling multiple sewing actions by one motor.

[0016] The beneficial effects of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions, are as follows: the sewing actions of reverse sewing, lifting and lowering the presser foot, and cutting the thread are realized through the operation of one motor. The rear output shaft and the front output shaft of the motor are skillfully used to control the actions of lifting and lowering the presser foot, reverse sewing, and cutting the thread, making the structure of the sewing machine more compact, the design of the sewing machine more reasonable, and significantly reducing the production cost of the sewing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions;

[0018] Figure 2 It is a schematic diagram of a presser foot lifting mechanism and a reverse sewing mechanism of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions;

[0019] Figure 3 It is a schematic diagram of a thread cutting mechanism of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions;

[0020] Figure 4 It is a structural diagram of a reverse sewing cam of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions;

[0021] Figure 5 It is a structural diagram of a reverse sewing connecting rod of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions;

[0022] Figure 6 It is a structural diagram of a presser foot lifting cam of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions;

[0023] Figure 7 It is a structural diagram of a sliding pin of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions;

[0024] Figure 8 It is a structural diagram of a tangent driving crank of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions;

[0025] Figure 9 It is a structural diagram of a tangent lever of a sewing machine according to the present application, which is controlled by one motor to perform multiple sewing actions.

[0026] Reference numerals: 1. Motor; 11. Electromagnet; 111. Sliding pin; 112. Fixed plate; 113. First rear output shaft hole; 12. Front output shaft; 13. Rear output shaft; 2. Presser foot lifting mechanism; 21. Presser foot lifting cam; 211. Sliding pin groove; 212. Link groove; 213. Front low point; 214. Rear low point; 215. Second rear output shaft hole; 22. Presser foot lifting link; 23. Needle bar; 3. Reverse sewing mechanism; 31. Reverse sewing cam; 311. Central hole; 312. First concentric circle part; 313. Arc surface part; 314. Second concentric circle part; 32. Reverse sewing link; 321. Crank abutting part; 322. Fixed hole; 33. Swing seat; 331. Swing seat spring fixing rod; 34. Feed shaft; 35. Spring; 4. Thread cutting mechanism; 41. Thread cutting curved rod; 411. Connecting body; 412. Crank ball; 413. Front output shaft hole; 42. Thread cutting driving crank; 421. Crank hole; 422. Mounting opening; 423. Fixed frame; 424. Link fixing hole; 43. Link; 44. Thread cutting arm; 45. Blade; 5. Machine body; 51. Machine body spring fixing rod. Detailed implementation mode

[0027] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making the protection scope of the present application more clearly defined.

[0028] Figure 1 Figure 2 Figure 3 It is a structural diagram of a structure for controlling multiple sewing actions by one motor and a sewing machine in the present application. The structure for controlling multiple sewing actions by one motor specifically includes a motor 1, a presser foot lifting mechanism 2, a reverse sewing mechanism 3, and a thread cutting mechanism 4. The motor 1 includes an electromagnet 11 and / or a relay, an encoder 14, a front output shaft 12, and a rear output shaft 13. In the present application, the scheme of using a relay for the electromagnet 11 simultaneously has the same effect. The front output shaft 12 and the rear output shaft 13 of the motor 1 are respectively arranged at both ends of the motor 1. The rear output shaft 13 of the motor 1 controls the presser foot lifting mechanism 2 and the reverse sewing mechanism 3, and the front output shaft 12 of the motor 1 controls the thread cutting mechanism 4.

[0029] Attached Figure 1 Figure 2 In the figure, the above-mentioned presser foot lifting mechanism 2 includes a presser foot lifting cam 21, a presser foot lifting link 22, and a needle bar 23; the above-mentioned reverse sewing mechanism 3 includes a reverse sewing cam 31, a reverse sewing link 32, a swing seat 33, a feed shaft 34, and a spring 35.

[0030] The above-mentioned motor 1 has an electromagnet 11 installed on the rear end cover. The rear output shaft 13 of the motor 1 passes through the electromagnet 11. A presser foot lifting cam 21 and a reverse sewing cam 31 are fixed on the rear output shaft 13. An encoder 14 is installed on the front end cover of the motor 1. The front output shaft 12 passes through the encoder 14. A tangent lever 41 is fixed on the front output shaft 12. This application also has a machine body 5, and a machine body spring fixing rod 51 is arranged on the machine body 5. As another embodiment, a relay is used to replace the electromagnet 11 to achieve the same technical effect. Similarly, the relay is installed on the rear end cover of the motor 1.

[0031] In the attached drawings, the electromagnet 11 is connected with a sliding pin 111. The sliding pin 111 has a fixing plate 112 and a first rear output shaft hole 113. The rear output shaft 13 passes through the first rear output shaft hole 113. The first rear output shaft hole 113 is arranged on the fixing plate 112. The sliding pin 111 is connected with the fixing plate 112 (in Figure 7 ). The above-mentioned presser foot lifting cam 21 has a connecting rod groove 212, a front low point 213, a rear low point 214, a second rear output shaft hole 215 and a sliding pin groove 211 (shown in Figure 6 ). The rear output shaft 13 is fixed on the second rear output shaft hole 215 of the presser foot lifting cam 21. The sliding pin 111 is located on the sliding pin groove 211 of the presser foot lifting cam 21. The attraction of the electromagnet 11 causes the sliding pin 111 to leave or enter the sliding pin groove 211. The sliding pin 111 is synchronized with the rear output shaft 13, playing the role of the electromagnet 11 disengaging or engaging the sliding pin groove 211 and the presser foot lifting cam 21. The rear output shaft 13 passes through the presser foot lifting cam 21 and is fixedly connected to the reverse sewing cam 31. There is a gap between the rear output shaft 13 and the presser foot lifting cam 21. This gap provides conditions for the above-mentioned disengaging and engaging function of the electromagnet 11.

[0032] The above-mentioned reverse sewing cam 31 has a center hole 311, a first concentric circle part 312, an arc surface part 313 and a second concentric circle part 314 (shown in Figure 4 ). The center hole 311 of the reverse sewing cam 31 allows the rear output shaft 13 to pass through and be fixedly connected, so that the operation of the rear output shaft 13 drives the operation of the reverse sewing cam 31. An arc surface part 313 is arranged between the first concentric circle part 312 and the second concentric circle part 314. The first concentric circle part 312 and the second concentric circle part 314 are arranged with the center hole 311 as the center. The above-mentioned crank abutting part 321 abuts against the first concentric circle part 312 and the second concentric circle part 314 with different movements. The arc surface part 313 is not centered on the center hole 311.

[0033] The above-mentioned reverse sewing connecting rod 32 has a crank abutting part 321 and a fixing hole 322. The crank abutting part 321 at the lower end of the reverse sewing connecting rod 32 abuts against the reverse sewing cam 31. The fixing hole 322 is connected to the swing seat 33. The swing of the swing seat 33 drives the feed shaft 34 to operate (in Figure 5(shown in the figure). The above-mentioned swing seat 33 has a swing seat spring fixing rod 331, and a spring 35 is arranged between the swing seat spring fixing rod 331 and the body spring fixing rod 51 (shown in Figure 1 Figure 2 the figure), and the spring 35 is used to balance the swing seat 33, so that when the swing seat 33 swings with the reverse sewing connecting rod 32, there is a continuous rebounding force, thereby realizing the swing of the feeding shaft 34 and realizing the reverse sewing action.

[0034] When the presser foot is to be lifted, the rotation angle of the motor 1 of the present application refers to the angle change realized during the operation of the motor. The motor 1 of the presser foot lifting mechanism 2 of the present application outputs power in one forward and reverse rotation within the rotation angle. Due to the gap between the rear output shaft 13 and the presser foot cam 21, the rear output shaft 13 idles in the presser foot cam 21. The electromagnet 11 starts to eject the sliding pin 111, so that the sliding pin 111 enters the sliding pin groove 211 of the presser foot cam 21. The circular head of the presser foot connecting rod 22 runs between the matching front low point 213 and the rear low point 214 in the connecting rod groove 212 of the above-mentioned presser foot cam 21. The motor 1 rotates forward and reverse within the rotation angle to achieve the up and down movement of the presser foot connecting rod 22 between the front low point 213 and the rear low point 214 in the presser foot cam 21, so that the presser foot connecting rod 22 drives the up and down movement of the needle bar 23. At this time, the reverse sewing connecting rod 32 is connected to the rear output shaft 13 and drives the reverse sewing cam 31 to be on the concentric circle part 312. The reverse sewing cam 31 does not actually run, but only the crank abutting part 321 of the reverse sewing connecting rod 32 and the concentric circle part 312 of the reverse sewing cam 31 are idling around, realizing the presser foot lifting action by the motor 1 rotating forward and reverse once within the rotation angle. The above is the operation mode of the motor 1 when lifting the presser foot. As another solution of the present application, the above can be set such that the rear output shaft 13 of the motor rotates forward and reverse at different angles within the rotation angle to output power to realize the presser foot lifting action.

[0035] When the reverse sewing (needle pitch adjustment) is to be realized, the motor 1 of the reverse sewing mechanism 3 outputs power by rotating forward and reverse repeatedly within the rotation angle. The rear output shaft 13 idles in the gap of the presser foot cam 21, so it does not affect the presser foot cam 21. The motor 1 rotates forward and reverse repeatedly, so that the crank abutting part 321 of the reverse sewing connecting rod 32 contacts the arc surface part 313 of the reverse sewing cam 31. During reverse sewing, the crank abutting part 321 runs on the entire arc surface part 313, and the position of the crank abutting part 321 changes with the change of the abutting position of the arc surface part 313. The crank abutting part 321 realizes the swing operation, and then the swing seat 33 is driven by the fixing hole 322 of the reverse sewing cam 31, thereby realizing the swing of the feeding shaft 34 and realizing the reverse sewing action. The above is the operation mode of the motor 1 during the reverse sewing action. As another solution of the present application, the above can be set such that the rear output shaft 13 of the motor 1 rotates forward and reverse at different angles within the rotation angle to output power to realize the reverse sewing (needle pitch adjustment) action.

[0036] When the wire cutting action needs to be performed, the front output shaft 12 of the motor 1 is connected to control the wire cutting mechanism 4, and the wire cutting action is realized by the motor 1 of the wire cutting mechanism 4 rotating forward once within the rotation angle. As another solution of the present application, the wire cutting action is realized by the motor 1 of the wire cutting mechanism 4 rotating backward once within the rotation angle.

[0037] The above-mentioned wire cutting mechanism 4 includes a tangent curve rod 41, a tangent driving crank 42, a connecting rod 43, a blade 45 and two wire cutting arms 44. The tangent curve rod 41 has a connecting body 411, a crank ball 412 and a front output shaft hole 413; the tangent driving crank 42 has a crank hole 421, a mounting port 422, a fixing bracket 423 and a connecting rod fixing hole 424. The front output shaft hole 413 of the above-mentioned tangent curve rod 41 is fixed on the front output shaft 12, the connecting body 411 connects the crank ball 412 and the front output shaft hole 413, the crank ball 412 is installed in the crank hole 421 of the tangent driving crank 42, and the mounting port 422 of the tangent driving crank 42 is for the crank ball 412 to be placed into the connecting body 411. The connecting body 411 is connected to the fixing bracket 423, and the fixing bracket 423 is provided with a connecting rod fixing hole 424, and the connecting rod fixing hole 424 is connected to the fixed connecting rod 43. One end of the above-mentioned connecting rod 43 is connected to the tangent driving crank 42, and the other end of the connecting rod 43 is connected to two wire cutting arms 44. The connecting rod 43 drives one of the wire cutting arms 44 connected to the blade 45 under the push of the tangent driving crank 42; the other fixed wire cutting arm 44 fixes the tool holder, and the connecting rod 43 drives the wire cutting arm 44 to push the blade 45 to cut the wire. The above-mentioned pushing action is realized by the motor 1 of the present application rotating forward once within the rotation angle, successively driving the tangent curve rod 41, the tangent driving crank 42, the connecting rod 43 and the wire cutting arm 44, and finally the blade 45. The above is the operation mode of the motor 1 during the wire cutting action. As another solution of the present application, the front output shaft 12 of the motor 1 realizes the wire cutting action by rotating forward at different angles once within the rotation angle.

[0038] At the same time, when the motor 1 rotates forward once within the rotation angle during the wire cutting action, the rear output shaft 13 idles in the gap of the presser foot cam 21, and the crank abutting portion 321 abuts against the concentric circle portion two 314 of the reverse sewing cam 31. Actually, the crank abutting portion 321 of the reverse sewing connecting rod 32 and the concentric circle portion two 314 of the reverse sewing cam 31 are idling around each other. Therefore, during the wire cutting action, reverse sewing and presser foot lifting do not affect each other.

[0039] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. It is worth reminding that the reverse sewing mechanism 3, the presser foot lifting mechanism 2, and the thread cutting mechanism 4 involved in the reverse sewing action, the presser foot lifting action, and the thread cutting action of the above-mentioned motor 1 are all equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present application, or are directly or indirectly applied to other related technical fields, and are similarly included in the patent protection scope of the present application.

Claims

1. A structure for controlling multiple sewing actions by one motor, characterized in that, It includes a motor (1), a tangent curved rod (41) and a tangent drive crank (42). The motor (1) has a front output shaft (12) and a rear output shaft (13) respectively arranged at both ends of the motor (1); a tangent curved rod (41) is fixed on the front output shaft (12). The tangent curved rod (41) has a crank ball (412). The tangent drive crank (42) has a crank hole (421). The crank ball (412) is installed in the crank hole (421). The front output shaft (12) of the motor (1) realizes the thread cutting action of the thread cutting mechanism (4) by rotating forward once at different angles within the rotation angle. An electromagnet (11) is installed on the rear end cover of the motor (1). The electromagnet (11) is connected with a sliding pin (111). A presser foot cam (21) and a reverse sewing cam (31) are fixed on the rear output shaft (13). The rear output shaft (13) passes through the presser foot cam (21) and is fixedly connected to the reverse sewing cam (31). The presser foot cam (21) has a connecting rod groove (212), a front low point (213), a rear low point (214) and a sliding pin groove (211). The motor (1) outputs power by repeatedly rotating forward and backward within the rotation angle to realize the reverse sewing action of the reverse sewing mechanism (3). There is a gap between the rear output shaft (13) and the presser foot cam (21). The attraction of the electromagnet (11) makes the sliding pin (111) leave or enter the sliding pin groove (211). There is a presser foot connecting rod (22) with a circular head running between the matching front low point (213) and rear low point (214) in the connecting rod groove (212). The reverse sewing cam (31) abuts against a crank abutting portion (321) at the lower end of the reverse sewing connecting rod (32). The motor (1) outputs power by rotating forward and backward once within the rotation angle to realize the presser foot lifting and lowering action of the presser foot mechanism (2).

2. A structure for controlling multiple sewing actions by one motor according to claim 1, characterized in that The rear output shaft (13) of the motor (1) passes through the electromagnet (11). An encoder (14) is installed on the front end cover of the motor (1). The front output shaft (12) passes through the encoder (14).

3. A structure for controlling multiple sewing actions by one motor according to claim 1, characterized in that, The sliding pin (111) has a fixing plate (112) and a rear output shaft hole one (113). The rear output shaft (13) passes through the rear output shaft hole one (113). The rear output shaft hole one (113) is arranged on the fixing plate (112). The sliding pin (111) is connected to the fixing plate (112).

4. A structure for controlling multiple sewing actions by one motor according to claim 1, characterized in that, The presser foot cam (21) also has a rear output shaft hole two (215). The rear output shaft (13) is fixed on the rear output shaft hole two (215) of the presser foot cam (21).

5. A structure for controlling multiple sewing actions by one motor according to claim 1, characterized in that, The reverse sewing cam (31) also has a concentric circle part one (312), an arc surface part (313) and a concentric circle part two (314). The arc surface part (313) is arranged between the concentric circle part one (312) and the concentric circle part two (314).

6. A structure for controlling multiple sewing actions by one motor according to claim 5, characterized in that The reverse sewing cam (31) further has a central hole (311), the concentric circle part one (312) and the concentric circle part two (314) are arranged with the central hole (311) as the center, the crank abutting part (321) abuts on the concentric circle part one (312) and the concentric circle part two (314) with different actions, and the arc surface part (313) is not centered on the central hole (311).

7. A structure for controlling multiple sewing actions by one motor according to claim 1, characterized in that The tangent curved rod (41) further has a connecting body (411) and a front protruding shaft hole (413), the tangent driving crank (42) further has a mounting opening (422), the front protruding shaft hole (413) is fixed on the front protruding shaft (12), the connecting body (411) connects the crank ball (412) and the front protruding shaft hole (413), and the mounting opening (422) allows the crank ball (412) to be placed into the connecting body (411).

8. A structure for controlling multiple sewing actions by one motor according to claim 7, characterized in that The tangent driving crank (42) further has a fixing bracket (423) and a connecting rod fixing hole (424), the connecting body (411) is connected to the fixing bracket (423), the connecting rod fixing hole (424) is arranged on the fixing bracket (423), and the connecting rod fixing hole (424) connects the fixing connecting rod (43).

9. A sewing machine, having a presser foot lifting mechanism (2), a reverse sewing mechanism (3) and a thread cutting mechanism (4), characterized in that, A structure for controlling multiple sewing actions by one motor as described in any one of claims 1 to 8 is included.

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