Sewing machine control method and storage medium

Abstract

The invention provides a sewing machine control method and a storage medium, and belongs to the technical field of mechanical equipment control, and the method comprises the steps that the sewing machine control method is applied to electric control in a sewing machine and comprises the steps that sewing machine state signals collected by a first receiving sensor, a second receiving sensor or a third receiving sensor are obtained in real time; according to the sewing machine state signal, the target state of the sewing machine and a target to-be-controlled mechanism are determined, and the target to-be-controlled mechanism is at least one of a thread trimming mechanism, a presser foot lifting mechanism, a feed lifting mechanism and an automatic stitch length adjusting mechanism; based on the target state of the sewing machine, the motor assembly is controlled to drive the cam assembly to drive the target to-be-controlled mechanism to operate, so that the target to-be-controlled mechanism completes the actions of automatic presser foot lifting, automatic feed lifting, automatic thread trimming, automatic needle pitch adjustment or automatic differential ratio adjustment until the sewing machine reaches the target state of the sewing machine. Other automatic control functions can be added, and meanwhile the increase range of the use cost of the sewing machine is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical equipment control, and in particular to a sewing machine control method and a storage medium. Background Art

[0002] With the development of mechanical automation technology, more and more equipment is required by users to have the function of automatic control. Therefore, the existing automatic sewing machines have automatic presser foot lifting function and automatic thread trimming function.

[0003] At present, in the prior art, the stepper motor drive of a sewing machine is mainly used for the automatic presser foot lifting mechanism and the automatic thread trimming mechanism. If other automatic control functions are required, a stepper motor or power source drive needs to be added, which will greatly increase the cost of using the sewing machine.

[0004] Therefore, there is an urgent need for a sewing machine control method and a storage medium to improve the above problems. Summary of the invention

[0005] The present application provides a sewing machine control method and storage medium, which can increase other automatic control functions while reducing the increase in the use cost of the sewing machine.

[0006] In a first aspect, the present application provides a sewing machine control method, the sewing machine comprising: an electric control, a housing, a motor assembly, a cam, a thread trimming mechanism, a presser foot lifting mechanism, a tooth lifting mechanism, an automatic needle distance adjustment mechanism, a differential adjustment mechanism, a transmitting sensor, a first receiving sensor, a second receiving sensor and a third receiving sensor;

[0007] The electric control is the control center of the sewing machine, the motor assembly is mounted on the housing, the motor assembly is fixedly connected to the cam assembly through a motor shaft, the cam assembly includes a presser foot lifting cam, a tooth lifting cam and a thread trimming cam; the motor assembly and the electric control transmit control signals through electrical connection; the thread trimming mechanism, the presser foot lifting mechanism, the tooth lifting mechanism and the automatic needle distance adjustment mechanism all realize power transmission between the cam assembly and the motor assembly to complete the corresponding automatic control action; the transmitting sensor, the first receiving sensor, the second receiving sensor and the third receiving sensor are all electrically connected to the electric control;

[0008] The sewing machine control method is applied to the electric control in the sewing machine, and comprises:

[0009] Acquire in real time the sewing machine status signal collected by the first receiving sensor, the second receiving sensor or the third receiving sensor;

[0010] Determine the target state of the sewing machine and the target mechanism to be controlled according to the sewing machine state signal, wherein the target mechanism to be controlled is at least one of the thread trimming mechanism, the presser foot lifting mechanism, the teeth lifting mechanism, the automatic stitch length adjustment mechanism and the automatic differential speed ratio adjustment mechanism;

[0011] Based on the target state of the sewing machine, the motor assembly is controlled to drive the cam assembly to drive the target mechanism to be controlled to operate, so that the target mechanism to be controlled can complete the actions of automatic presser foot lifting, automatic tooth lifting, automatic thread trimming, automatic stitch length adjustment or automatic differential speed ratio adjustment until the sewing machine reaches the target state of the sewing machine.

[0012] In a possible implementation, the thread trimming mechanism, presser foot lifting mechanism, tooth lifting mechanism, automatic needle distance adjustment mechanism and differential adjustment mechanism are driven by the same stepping motor, and the thread trimming mechanism, presser foot lifting mechanism, tooth lifting mechanism, automatic needle distance adjustment mechanism and differential adjustment mechanism move according to a preset motion phase relationship.

[0013] In a possible implementation, the target mechanism to be controlled is a presser foot lifting mechanism, which includes a presser foot lifting bearing, a presser foot lifting cam, a presser foot lifting crank, a presser foot lifting rod, a locking crank, a presser foot shaft, a presser foot arm and a presser foot assembly; accordingly, based on the target state of the sewing machine, a control signal is sent to the motor assembly and the target mechanism to be controlled, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including: when it is detected that the target state of the sewing machine is that the presser foot assembly is lifted, the motor shaft of the motor assembly is controlled to rotate counterclockwise to drive the bearing, and the bearing surface and the surface of the presser foot lifting cam move in a curve within a preset angle a range, and the cam assembly drives the presser foot lifting cam to lift the presser foot. The presser foot crank rotates counterclockwise, and drives the presser foot lifting rod, the locking crank, the presser foot shaft, and the presser foot arm to move in sequence, so as to drive the presser foot to be lifted; or when it is detected that the target state of the sewing machine is that the presser foot assembly is lifted to the highest position of the preset stroke, the motor assembly is controlled to drive the presser foot lifting cam to operate in the preset angle b interval, so that the presser foot assembly is located at the highest position of the preset stroke; or when it is detected that the target state of the sewing machine is that the presser foot assembly and the needle plate coincide with each other, the motor assembly is controlled to drive the presser foot lifting cam to rotate clockwise, and the presser foot assembly moves downward under the action of the presser foot rod mechanism, and the presser foot lifting bearing returns to the base circle position along the surface of the presser foot lifting cam, so as to drive the presser foot assembly to coincide with the needle plate.

[0014] In one possible implementation, the target mechanism to be controlled is a thread trimming mechanism, which includes a thread trimming bearing, a movable knife assembly and a fixed knife; accordingly, based on the target state of the sewing machine, a control signal is sent to the motor assembly and the target mechanism to be controlled, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including: when it is detected that the target state of the sewing machine is the thread trimming state, the motor shaft of the motor assembly is controlled to rotate clockwise, and when the bearing surface of the thread trimming crank shaft of the motor shaft and the thread trimming cam surface move in a preset angle d range, the movable knife assembly engages with the fixed knife to complete the thread trimming.

[0015] In one possible implementation, the target mechanism to be controlled is a tooth-lifting mechanism, which includes a tooth-lifting bearing, a tooth-lifting shaft, a tooth-lifting crank and a tooth-lifting slider; accordingly, based on the target state of the sewing machine, a control signal is sent to the motor assembly and the target mechanism to be controlled, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including: when it is detected that the target state of the sewing machine is the tooth-lifting working state, the motor assembly is controlled to start, so that when the motor shaft rotates, the tooth-lifting cam drives the tooth-lifting bearing to rotate, and then drives the tooth-lifting shaft, the tooth-lifting crank and the tooth-lifting slider to move in turn, so that the tooth-lifting slider increases or decreases the inclination of the teeth, and the working range of the tooth-lifting mechanism is the preset angle c range.

[0016] In a possible implementation, the sewing machine working state corresponding to the tooth lifting working state includes a normal sewing working state or a sewing stop state of the sewing machine.

[0017] In a possible implementation, the target mechanism to be controlled is an automatic stitch length adjustment mechanism, which includes a main shaft, a cloth feed eccentric assembly, a driving crank and an automatic button shaft; accordingly, based on the target state of the sewing machine, a control signal is sent to the motor assembly and the target mechanism to be controlled, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including: when it is detected that the target state of the sewing machine is a stitch length adjustment state, the motor assembly is controlled to rotate so that the main shaft and the cloth feed eccentric assembly rotate in turn to change the eccentricity of the cloth feed eccentric wheel assembly to achieve stitch length adjustment.

[0018] In one possible implementation, the target mechanism to be controlled is a differential adjustment mechanism; accordingly, a control signal is sent to the motor assembly and the target mechanism to be controlled based on the target state of the sewing machine, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including: when it is detected that the target state of the sewing machine is adjusted to a preset differential ratio, a target differential ratio value is selected from a preset differential ratio database; the motor assembly is driven to rotate according to the target differential ratio value until the motor assembly reaches the target differential ratio position.

[0019] In a possible implementation, the method further includes: when it is detected that the target mechanism to be controlled is a tooth lifting mechanism, the thread trimming mechanism, the presser foot lifting mechanism, the automatic needle distance adjustment mechanism and the automatic differential adjustment mechanism are controlled to stop running.

[0020] In a second aspect, the present application provides a computer-readable storage medium, in which computer execution instructions are stored. When the electronic control in the sewing machine executes the computer execution instructions, the sewing machine control method described in the first aspect is implemented.

[0021] The present application provides a sewing machine control method and a storage medium, wherein the method first obtains a sewing machine status signal in real time, then determines a target state of the sewing machine and a target mechanism to be controlled according to the sewing machine status signal, and finally controls a motor assembly to drive a cam assembly based on the target state of the sewing machine to drive the target mechanism to be controlled to operate, so that the target mechanism to be controlled can complete automatic presser foot lifting, automatic tooth lifting, automatic thread trimming, automatic stitch length adjustment or automatic differential speed ratio adjustment until the sewing machine reaches the target state of the sewing machine, thereby reducing the time cost and labor cost consumed by manual intervention through automatic control, thereby reducing the use cost of the sewing machine and the labor intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 A schematic diagram of the overall structure of a sewing machine provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the connection structure of the motor assembly 21, the thread trimming mechanism, the tooth lifting mechanism and the presser foot lifting mechanism provided in the embodiment of the present application;

[0025] Figure 3 An exploded view of the motor assembly 21, the thread trimming mechanism, the tooth lifting mechanism and the presser foot lifting mechanism provided in the embodiment of the present application;

[0026] Figure 4 A schematic flow chart of a sewing machine control method provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of a preset motion phase relationship provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of the stroke angle of the presser foot lifting cam provided in an embodiment of the present application;

[0029] Figure 7 A schematic diagram of the control logic flow of the automatic presser foot lift provided in an embodiment of the present application;

[0030] Figure 8 A schematic diagram of the thread trimming cam stroke angle provided in an embodiment of the present application;

[0031] Fig. 9 A schematic diagram of the control logic flow of automatic thread trimming provided in an embodiment of the present application;

[0032] Fig.10 A schematic diagram of the tooth lifting cam stroke angle provided in an embodiment of the present application;

[0033] Fig.11 A schematic diagram of the control logic flow of automatic tooth lifting provided in an embodiment of the present application;

[0034] Fig.12 A schematic diagram of the control logic flow of automatic needle distance adjustment provided in an embodiment of the present application;

[0035] Fig.13 A schematic diagram of the control logic flow of automatically adjusting the differential ratio provided in an embodiment of the present application;

[0036] Fig.14 A structural schematic diagram of a sewing machine control device provided in an embodiment of the present application;

[0037] Fig.15 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application.

[0038] Reference numerals:

[0039] 1: electronic control; 2: housing; 21: motor assembly; 21-1: motor shaft; 22: cam assembly; 3: transmitting sensor; 4: first receiving sensor; 5: second receiving sensor; 6: third receiving sensor; 22-1: presser foot lifting cam; 22-2: tooth lifting cam; 22-3: thread trimming cam; 205: presser foot lifting rod; 206: presser foot lifting crank; 25: presser foot lifting connecting rod; 211: presser foot lifting bearing; 18: locking crank; 7: presser foot assembly; 8: presser foot arm; 9: presser foot shaft; 10: fixed knife; 11: moving knife assembly; 12: spindle; 13: feed eccentric assembly; 13-1: feed dog; 15: tooth rack assembly; 16: tooth lifting slider; 17: differential crank Handle assembly; 18: locking crank; 23: spindle motor; 103: thread trimmer bearing; 27: cutter connecting rod; 102: thread trimmer crank; 104: axial screw; 105: thread trimmer crank shaft; 107: thread trimmer base; 311: thread lifting bearing; 301: thread lifting crank; 302: retaining ring; 304: bushing; 305: thread lifting shaft; 306: spring; 309: thread lifting drive plate; 401: transmission shaft; 402: drive crank; 403: support seat; 405: automatic button shaft; 407: second reset spring; 1303: cloth feeding eccentric wheel; 1305: stitch length adjustment cam; 1306: internal tooth locking plate; 1307: external tooth seat; 1308: third reset spring. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] An embodiment of the present application provides a sewing machine control method for automatically realizing the functions of automatically lifting the presser foot, automatically lifting the teeth, automatically trimming the thread, automatically adjusting the stitch length, and automatically adjusting the differential ratio of the sewing machine.

[0042] Figure 1 A schematic diagram of the overall structure of a sewing machine provided in an embodiment of the present application.

[0043] Figure 2 This is a schematic diagram of the connection structure of the motor assembly 21, the thread trimming mechanism, the tooth lifting mechanism and the presser foot lifting mechanism provided in an embodiment of the present application.

[0044] like Figure 1 and Figure 2As shown, the sewing machine includes: an electronic control 1, a housing 2, a motor assembly 21, a cam assembly 22, a thread trimming mechanism, a presser foot lifting mechanism, a tooth lifting mechanism, an automatic needle distance adjustment mechanism, a differential adjustment mechanism, a transmitting sensor 3, a first receiving sensor 4, a second receiving sensor 5 and a third receiving sensor 6.

[0045] Among them, Figure 1 As shown, the electric control 1 is the control center of the sewing machine. In this embodiment, the electric control 1 can be a programmable logic controller PLC, a computer, a chip or other equipment with signal receiving and processing functions. The electric control 1 can be integrated in a box and can be fixedly mounted on the housing 2 by bolt connection or clamping.

[0046] The casing 2 may be a shell for integrating the sewing machine into a whole, and the shell is provided with a mounting hole and a through hole for an object to pass through.

[0047] Figure 3 An exploded view of the motor assembly 21, thread trimming mechanism, tooth lifting mechanism and presser foot lifting mechanism provided in an embodiment of the present application.

[0048] like Figure 1 and Figure 2 As shown, the motor assembly 21 can be a stepper motor, a servo motor or other power source that can increase power. In this embodiment, the motor assembly 21 adopts a stepper motor, and the motor assembly 21 can be installed on the housing 2. The motor assembly 21 is fixedly connected to the cam assembly 22 through the motor shaft 21-1.

[0049] In this embodiment, the motor assembly 21 can be fixedly installed at the bottom of the side of the housing 2 by screw connection. In this embodiment, one end of the motor shaft 21-1 is fixedly installed in the motor assembly 21, and the other end of the motor shaft 21-1 can be fixedly connected to the cam assembly 22 by key connection. The motor assembly 21 and the electronic control 1 transmit control signals through electrical connection.

[0050] In this embodiment, the cam assembly 22 includes a presser foot lifting cam 22-1, a tooth lifting cam 22-2 and a thread trimming cam 22-3. The presser foot lifting cam 22-1, the tooth lifting cam 22-2 and the thread trimming cam 22-3 are all arranged on the motor shaft 21-1 and fixed by a top screw. The thread trimming mechanism, the presser foot lifting mechanism, the tooth lifting mechanism and the automatic needle distance adjustment mechanism are all electrically connected to the electronic control 1; the transmitting sensor 3, the first receiving sensor 4, the second receiving sensor 5 and the third receiving sensor 6 are all electrically connected to the electronic control 1.

[0051] In this embodiment, the transmitting sensor 3 may be a photoelectric sensor, an infrared sensor or a proximity sensor. The transmitting sensor 3 is used to transmit a detection signal to the first receiving sensor 4, the second receiving sensor 5 and the third receiving sensor 6. When the first receiving sensor 4, the second receiving sensor 5 and the third receiving sensor 6 receive the detection signal, a sensor signal timing sequence is generated and the sensor signal timing sequence is transmitted to the electronic control 1 through an electrical connection. When the electronic control 1 obtains the corresponding action to be performed by the sewing machine according to the received sensor signal, the sewing machine is controlled to automatically perform the corresponding action according to the action to be performed.

[0052] In this embodiment, the first receiving sensor 4 is used to generate a signal related to the presser foot lifting, which corresponds to the position of the presser foot or the thickness of the sewing material. After the electronic control 1 receives the signal feedback from the first receiver 4, it will determine whether to control the presser foot lifting mechanism to perform the next action.

[0053] The second receiving sensor 5 is used to generate a signal related to thread trimming, which corresponds to the position of the needle and thread. When the position of the needle and thread reaches the preset thread trimming position, the electronic control 1 sends a control signal to enable the motor assembly 21 to drive the thread trimming mechanism to perform the thread trimming action and complete automatic thread trimming.

[0054] The third receiving sensor 6 is used to generate a signal for preventing cloth cutting. When a relatively small sewing material passes through the signal collection of the third receiving sensor 6, it is found that when the position of the sewing material has not reached the preset cutting position, in order to avoid the sewing material being cut by the cloth cutting tool, the electronic control 1 will not send a control signal to prevent the sewing material from being cut.

[0055] Figure 4 This is a flow chart of the sewing machine control method provided in the embodiment of the present application. The execution subject of this embodiment can be Figure 1 The electronic control 1 in the illustrated embodiment may also be other computer-related devices, and this embodiment is not particularly limited.

[0056] like Figure 4 As shown, the sewing machine control method includes:

[0057] S401: Acquire the sewing machine status signal collected by the first receiving sensor 4, the second receiving sensor 5 or the third receiving sensor 6 in real time.

[0058] In this embodiment, the sewing machine status signal can be a signal that can reflect the position of the sewing material, the position of the needle, the inclination of the teeth and the position of the thread in the sewing machine. In this embodiment, the signal collection process and use of the first receiving sensor 4, the second receiving sensor 5 or the third receiving sensor 6 are as follows: Figure 1 The above has been explained in the embodiment shown, so this embodiment will not be described again here.

[0059] S402 determines the target state of the sewing machine and the target mechanism to be controlled according to the sewing machine state signal, wherein the target mechanism to be controlled is at least one of a thread trimming mechanism, a presser foot lifting mechanism, a tooth lifting mechanism and an automatic stitch length adjusting mechanism.

[0060] In this embodiment, determining the target state of the sewing machine and the target mechanism to be controlled based on the sewing machine status signal can be a process in which the electronic control 1 determines the target state of the sewing machine and the target mechanism to be controlled after indexing the received sewing machine status signal in a preset signal and working state correspondence relationship.

[0061] In this embodiment, the target mechanism to be controlled can be any one or a combination of two of the thread trimming mechanism, the presser foot lifting mechanism, the thread lifting mechanism and the automatic stitch length adjustment mechanism. For example, when the electronic control 1 detects that the next action to be automatically performed by the sewing machine is the thread trimming operation, the target mechanism to be controlled is the thread trimming mechanism. When the electronic control 1 detects that the next action to be automatically performed by the sewing machine is the material unwinding, the motor assembly 21 needs to be controlled to simultaneously drive the presser foot lifting mechanism and the thread lifting mechanism to start.

[0062] S403: Based on the target state of the sewing machine, the motor assembly is controlled to drive the cam assembly to drive the target mechanism to be controlled to operate, so that the target mechanism to be controlled can complete the actions of automatically lifting the presser foot, automatically lifting the teeth, automatically trimming the thread, automatically adjusting the stitch length or automatically adjusting the differential ratio until the sewing machine reaches the target state of the sewing machine.

[0063] In this embodiment, controlling the motor assembly based on the sewing machine target state means that the electronic control 1 selects a corresponding control signal according to the sewing machine target state, so that the motor assembly drives the cam assembly 22 to rotate clockwise or counterclockwise according to the corresponding control signal. When the sewing machine reaches the sewing machine target state, the control is stopped.

[0064] Specifically, in an optional embodiment of the present application, the thread trimming mechanism, the presser foot lifting mechanism, the tooth lifting mechanism, the automatic needle distance adjustment mechanism and the differential adjustment mechanism are driven by the same stepping motor, and the thread trimming mechanism, the presser foot lifting mechanism, the tooth lifting mechanism, the automatic needle distance adjustment mechanism and the differential adjustment mechanism move according to a preset motion phase relationship.

[0065] Figure 5 A schematic diagram of the preset motion phase relationship provided in an embodiment of the present application.

[0066] like Figure 5 As shown, since the thread trimming mechanism, presser foot lifting mechanism, tooth lifting mechanism, automatic stitch length adjustment mechanism and differential adjustment mechanism are driven by the same stepping motor, there are multiple angle intervals of working phases. For example, in the thread trimming mechanism, thread trimming can only be completed when the motor shaft 21-1 of the motor assembly 21 is selected clockwise and the surface of the thread trimming cam 20 moves in a curve in the angle interval d. In this embodiment, Figure 5As shown, angle e is the preset maximum engagement position of the movable knife and the fixed knife.

[0067] Based on the above embodiments, in an optional embodiment of the present application, the target mechanism to be controlled is a presser foot lifting mechanism, which includes a presser foot lifting bearing 211, a presser foot lifting cam 221, a presser foot lifting crank 206, a presser foot lifting rod 205, a locking crank 18, a presser foot shaft 9, a presser foot arm 8 and a presser foot assembly 7.

[0068] Accordingly, based on the target state of the sewing machine, a control signal is sent to the motor assembly and the target mechanism to be controlled, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including:

[0069] Step S403a: When it is detected that the target state of the sewing machine is that the presser foot assembly is lifted, the motor shaft 21-1 of the motor assembly 21 is controlled to rotate counterclockwise to drive the bearing, and the surface of the bearing 211 and the surface of the presser foot lifting cam 221 move in a curve within a preset angle a range. The cam assembly 22 drives the presser foot lifting crank 206 to rotate counterclockwise, and in turn drives the presser foot lifting rod 205, the locking crank 18, the presser foot shaft 9, and the presser foot arm 8 to move to drive the presser foot to be lifted.

[0070] Step S403b: or when it is detected that the target state of the sewing machine is that the presser foot assembly is lifted to the highest position of the preset stroke, the motor assembly 21 is controlled to drive the presser foot lifting cam 221 to operate in the preset angle b interval so that the presser foot assembly 7 is located at the highest position of the preset stroke.

[0071] Step S403c: Or when it is detected that the target state of the sewing machine is the overlap state of the presser foot assembly and the needle plate, the motor assembly 21 is controlled to drive the presser foot lifting cam 22-1 to rotate clockwise, and the presser foot assembly moves downward under the action of the presser foot rod mechanism, and the presser foot lifting bearing 211 returns to the base circle position along the surface of the presser foot lifting cam 22-1 to drive the presser foot assembly to overlap with the needle plate.

[0072] like Figure 2 and Figure 3As shown, in the present embodiment, the presser foot lifting crank 206 in the presser foot lifting mechanism can be connected and fixed to the end cover of the motor assembly 21 by means of an axial screw and a gasket, the presser foot lifting rod 205 can be fixedly connected to the presser foot lifting crank 206 by means of an axial screw, a gasket and a nut, and the presser foot lifting rod 205 can be fixedly connected to the presser foot lifting connecting rod 25 by means of an axial screw, a gasket and a nut; the presser foot lifting bearing 211 can be fixedly connected to the presser foot lifting crank 206 by means of an axial screw, a gasket and a nut; under the action of the first return spring, the bearing 211 is always in contact with the surface of the presser foot lifting cam 22-1. When the motor shaft 21-1 rotates counterclockwise, the surface of the presser foot lifting bearing 211 and the surface of the presser foot lifting cam 22-1 move in a curve in the angle a range, and then the cam assembly 22 drives the presser foot lifting crank 206 to rotate counterclockwise, which in turn drives the presser foot lifting rod 205, the presser foot lifting connecting rod 25, the locking crank 18, the presser foot shaft 9, and the presser foot arm 8 to move, and finally drives the presser foot to be lifted; when the presser foot lifting cam 22-1 runs in the angle b range, the presser foot assembly 7 is in the highest position; when the presser foot lifting cam 22-1 rotates clockwise, the presser foot assembly moves downward under the action of the presser foot rod mechanism, and the presser foot lifting bearing 211 returns to the base circle position along the surface of the presser foot lifting cam 22-1, and the presser foot assembly coincides with the needle plate.

[0073] Figure 6 This is a schematic diagram of the presser foot lifting cam travel angle provided in an embodiment of the present application.

[0074] Figure 7 A schematic diagram of the control logic flow of the automatic presser foot lift provided in an embodiment of the present application.

[0075] like Figure 6 and Figure 7 As shown, the automatic presser foot lifting control process starts with the sewing machine putting the sewing material. When the electronic control 1 receives the sensor timing signal, the sewing machine target state is the presser foot assembly lifting, which corresponds to the sewing material being put in. At this time, the presser foot needs to be lifted and the teeth are adjusted under the needle plate. Otherwise, the sewing machine is controlled to stop after sewing.

[0076] Then determine whether the sewing material is normal. If it is normal, it means that the sewing material is finished, so that the presser foot is pressed down and the teeth return to the normal sewing position above the needle plate. Otherwise, lift the presser foot again and adjust the teeth to under the needle plate.

[0077] Then, it is determined whether the sewing machine is sewing normally according to the received sewing machine status signal. If the sewing machine is sewing normally, it will continue to sew until the sewing machine is finished, and the electronic control 1 will send a brake signal to stop the sewing machine after the sewing is finished. If the sewing machine is not sewing normally, the electronic control 1 will send a midway stop signal, and continue to receive the sewing machine status signal after the sewing material is arranged to determine whether it is sewing normally. Otherwise, it means that the sewing material arrangement is not completed, and the midway stop signal will continue to be sent.

[0078] like Figure 6 As shown, in the above process, the stroke angle of the presser foot lifter is in the preset angle a interval. When the presser foot assembly is lifted to the preset maximum stroke height, the maximum height of the presser foot lifter is maintained at the preset angle b interval. In this process, the cam presser foot lifter curve is as follows: Figure 6 shown.

[0079] Please refer to Figure 2 and Figure 3 Based on the above embodiment, in an optional embodiment of the present application, the target mechanism to be controlled is a thread trimming mechanism, and the thread trimming mechanism includes a thread trimming bearing 103, a movable knife assembly 11 and a fixed knife 10.

[0080] In this embodiment, the moving knife shaft of the moving knife assembly 11 in the thread trimming mechanism is connected to the cutter connecting rod 27, and the cutter connecting rod 27 is connected to the connecting pin and the connecting rod pin and the moving knife shaft are locked by screws; the thread trimming bearing 103 is locked on the thread trimming crank shaft 105 by the axial screw 104, rotates around the axial screw 104, and the thread trimming crank shaft 105 is installed on the thread trimming crank 102 and is locked and fixed by screws; the thread trimming base 107 is fixed to the housing 2 by screws, the assembled thread trimming crank shaft 105 passes through the inner hole of the thread trimming base 107, and then the spring is installed into the inner hole of the thread trimming crank shaft 105, and then the pressure regulating screw is screwed into the thread trimming base 107;

[0081] Accordingly, based on the target state of the sewing machine, a control signal is sent to the motor assembly and the target mechanism to be controlled, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including:

[0082] Step S403d: When it is detected that the target state of the sewing machine is the thread trimming state, the motor shaft 21-1 of the motor assembly 21 is controlled to rotate clockwise. When the bearing 103 surface of the motor shaft 21-1 and the surface of the thread trimming cam 20 move in the preset angle d range, the movable knife assembly 11 engages with the fixed knife 10 to complete the thread trimming.

[0083] Figure 8 A schematic diagram of the thread trimming cam travel angle provided in an embodiment of the present application.

[0084] like Figure 8 As shown, in this embodiment, when the motor shaft 21-1 is stationary, under the action of the spring, the bearing 103 is always in contact with the surface of the thread trimming cam 20, so that the movable knife assembly 11 is in an open state. Only when the motor shaft 21-1 rotates clockwise and the surface of the thread trimming bearing 103 and the surface of the thread trimming cam 22-3 move in a curve within a preset angle d interval, the movable knife assembly 11 will mesh with the fixed knife 10. In this process, the cam thread trimming curve is as follows Figure 8 shown.

[0085] like Figure 8As shown, in this embodiment, due to the overlapping interval of partial movement caused by a stepping motor, the preset angle interval e is to ensure that the movable cutter is in a fixed position when the needle distance is automatically adjusted.

[0086] Fig. 9 A schematic diagram of the control logic flow of automatic thread trimming provided in an embodiment of the present application.

[0087] like Fig. 9 As shown, it starts by detecting whether the sewing machine is loaded with sewing materials. If so, it reacts to collect the normal sewing signal of the sewing machine working normally, otherwise it stops the sewing machine after sewing. Sewing is normal and waits to receive the front thread trimming signal. After receiving it, it continues to control the sewing machine to sew normally, and the electric control 1 sends a thread trimming control signal to the motor component 21. The thread trimming control signal starts the motor component 21 and drives the thread trimming mechanism to perform the front thread trimming operation.

[0088] The sewing machine continues to enter the normal sewing working state until the electronic control 1 determines that the rear thread trimming operation will continue according to the signal collected by the receiving sensor 3, then the electronic control 1 sends a rear thread trimming signal to continue to control the sewing machine to sew normally, and the electronic control 1 sends a thread trimming control signal, which starts the motor assembly 21 and drives the thread trimming result to perform the rear thread trimming operation. After the thread trimming is completed, the needle number compensation is performed again until the sewing of the sewing material is completed, and then the electronic control 1 sends a brake signal to stop the sewing machine after sewing.

[0089] Based on the above embodiment, in an optional embodiment of the present application, the target mechanism to be controlled is a tooth lifting mechanism, which includes a tooth lifting bearing 311, a tooth lifting shaft 305, a tooth lifting crank 301 and a tooth lifting slider 16.

[0090] In this embodiment, the tooth lifting bearing 311 in the tooth lifting mechanism is fixedly mounted on the tooth lifting drive plate 309, and the drive plate 309 is fixedly mounted on the tooth lifting shaft 305; the sleeve 304 is bonded to the hole of the housing 2, and the spring 306 is sleeved on the sleeve 304, and the bent end of the spring 306 is pressed on the drive plate 309, so that the surface of the bearing 311 is always in contact with the surface of the tooth lifting cam 22-2; the tooth lifting shaft 305 is fixed by the retaining ring 302 and the drive plate 309 through the sleeve 304 hole, and rotates in the sleeve 304; one end of the tooth lifting crank 301 is fixed on the tooth lifting shaft 305, and the other end of the tooth lifting crank 301 passes through the tooth lifting slider 16. Accordingly, based on the target state of the sewing machine, a control signal is sent to the motor assembly and the target mechanism to be controlled, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, and also includes:

[0091] Step S403e: When it is detected that the target state of the sewing machine is the tooth lifting working state, the motor assembly 21 is controlled to start, so that when the motor shaft 21-1 rotates, the tooth lifting cam 22-2 drives the bearing 311 to rotate, and then drives the tooth lifting shaft 305, the tooth lifting crank 301 and the tooth lifting slider 16 to move in turn, so that the tooth lifting slider 16 increases or decreases the tooth inclination, and the working range of the tooth lifting mechanism is the preset angle c range.

[0092] Fig.10 A schematic diagram of the tooth lifting cam travel angle provided in an embodiment of the present application.

[0093] like Fig.10 As shown, in this embodiment, the rotation of the tooth lifting shaft 305 drives the tooth lifting crank 301 to rotate, thereby driving the tooth lifting slider 16 to move up and down; the feed dog 13-1 is fixed to the tooth rack assembly 15 by a screw, and rotates around the main shaft 12 through the main shaft slider 14; when the tooth lifting crank 301 rotates, it drives the tooth lifting slider 16 to move up and down, thereby driving the tooth rack assembly 15 to rotate around the main shaft 12 through the main shaft slider 14, and finally drives the feed dog to move up and down. The tooth lifting working range is in the preset angle c range. On the tooth lifting curve, the tooth lifting bearing 311 moves on the maximum base circle and the minimum base circle when trimming the thread and lifting the presser foot. In this process, the tooth lifting curve is as shown in FIG. Fig. 9 as shown in .

[0094] Fig.11 A schematic diagram of the control logic flow of automatic tooth lifting provided in an embodiment of the present application.

[0095] like Fig.11 As shown, when the sewing machine is powered on, the electric control 1 first reads the pre-stored tooth tilt database from the storage space, then selects the sewing material type specification from the tooth tilt database, and then sends a tooth tilt data signal corresponding to the sewing material type specification. After the motor component 21 receives the corresponding tooth tilt data signal, the motor component 21 rotates to the corresponding position until the position of the motor component 21 is locked.

[0096] The electronic control 1 sends a sewing signal to make the sewing machine sew normally. It also detects in real time whether the tooth inclination needs to be changed. If so, it returns to the step of selecting the sewing material type specification from the tooth inclination database. Otherwise, the sewing machine is controlled to sew normally until the electronic control 1 sends a brake signal, and the sewing machine is controlled to stop sewing according to the brake signal.

[0097] In an optional embodiment of the present application, the sewing machine working state corresponding to the tooth lifting working state includes the sewing machine normal sewing working state or the sewing stop state.

[0098] Based on the above embodiment, in an optional embodiment of the present application, the target mechanism to be controlled is an automatic needle distance adjustment mechanism, and the automatic needle distance adjustment mechanism includes a main shaft 12 and a cloth feeding eccentric assembly 13.

[0099] In this embodiment, one end of the transmission shaft 401 in the automatic stitch length adjustment mechanism is fixedly connected to the thread trimming cam 20, and the other end of the transmission shaft 401 is sleeved in the hole of the support seat 403 and can rotate freely; the support seat 403 is arranged on the casing 2; the driving crank 402 is arranged on the transmission shaft 401 and is directly opposite to the automatic button shaft 405; a sealing ring is provided in the hole of the casing 2, one end of the automatic button shaft 405 passes through the sealing ring, the second reset spring 407 is installed on the automatic button shaft 405, and the other end of the automatic button shaft 405 is sleeved with a limit plate; accordingly, based on the target state of the sewing machine, a control signal is sent to the motor assembly and the target mechanism to be controlled, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including:

[0100] Step S403f: When it is detected that the target state of the sewing machine is the stitch size adjustment state, the motor assembly 21 is controlled to rotate so that the main shaft 12 and the cloth feed eccentric assembly 13 rotate in sequence to change the eccentricity of the cloth feed eccentric wheel assembly 13 to achieve stitch size adjustment. In this embodiment, when the motor shaft 21-1 receives the indication signal from the electronic control 1 and rotates clockwise according to the indication signal, and drives the thread trimming cam 20, the transmission shaft 401 and the driving crank 402 to move, the outer end of the driving crank 402 presses against the automatic button shaft 405, and then pushes the automatic button shaft 405 to press against the inner tooth locking plate 1306, and is stuck in the groove of the stitch length adjustment cam 1305, so that the stitch length adjustment cam is fixed and cannot rotate. The driving crank 402 pushes the automatic button shaft 405 into the groove of the stitch length adjustment cam 1305, so that the tooth matching part of the inner tooth locking plate 1306 and the outer tooth seat 1307 is disengaged; at this time, the electronic control 1 will give an instruction to the spindle motor 23 to rotate the spindle motor 23, drive the spindle 12 and the cloth feeding eccentric wheel 1303 to rotate, thereby changing the eccentricity of the cloth feeding eccentric wheel assembly 13 to achieve the size adjustment of the stitch length. When the motor shaft 21-1 rotates counterclockwise, driving the driving crank 402 to disengage from the automatic button shaft 405, the automatic button shaft 405, under the action of the second reset spring 407 and the third reset spring 1308, disengages from the "notch" of the cloth feeding eccentric wheel 1303 and resets, and at the same time, the inner tooth locking piece 1306 resets the "inner teeth" and meshes with the "outer teeth" of the outer tooth seat 1307, so that the eccentricity of the cloth feeding eccentric wheel assembly 13 is fixed, that is, the eccentricity will not change with the rotation of the main shaft. In this embodiment, the driving crank 402 pushes the automatic button shaft 405 into the groove of the stitch length adjustment cam 1305, so that the tooth shape matching position of the inner tooth locking piece 1306 and the outer tooth seat 1307 is disengaged. The stitch length can be adjusted only when the inner tooth locking piece 1306 is disengaged from the outer tooth seat 1307; when the inner tooth locking piece 1306 and the outer tooth seat 1307 are reset to become a whole, the cloth feeding eccentric wheel assembly 13 plays a cloth feeding role when it rotates with the main shaft.

[0101] Fig.12A schematic diagram of the control logic flow of automatic needle distance adjustment provided in an embodiment of the present application.

[0102] like Fig.12 As shown, the first step is to turn on the power of the sewing machine. The electronic control 1 starts after power is turned on, reads the needle distance database from the storage space, and then selects the appropriate needle distance size from the needle distance database. Then, the corresponding needle distance size data signal is sent according to the selected needle distance size. The spindle motor rotates slowly, and the sewing machine starts to work. At the same time, the motor assembly 21 rotates under control. When it is detected that the motor assembly 21 is within the locking position range, the spindle motor is controlled to rotate according to the corresponding needle distance size data until the electronic control 1 sends a needle distance adjustment end signal. When it is detected that the motor assembly 21 is not within the locking position range, the motor 21 is controlled to continue to rotate. After the electronic control 1 sends the needle distance adjustment end signal, the spindle motor and the motor assembly 21 are controlled to reset, the automatic needle distance adjustment is completed, and the standby mode ends.

[0103] On the basis of the above embodiment, the target mechanism to be controlled is a differential adjustment mechanism; accordingly, based on the target state of the sewing machine, a control signal is sent to the motor assembly 21 and the target mechanism to be controlled, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including:

[0104] Step S403g: When it is detected that the target state of the sewing machine is adjusted to a preset differential ratio, a target differential ratio value is selected from the preset differential ratio database.

[0105] Step S403h: driving the motor assembly 21 to rotate according to the target differential ratio value until the motor assembly 21 reaches the target differential ratio position.

[0106] like Figure 3 As shown, in this embodiment, the differential adjustment mechanism includes a differential crank assembly 17 and a slider disposed in the differential crank assembly 17 .

[0107] Fig.13 A schematic diagram of the control logic flow for automatically adjusting the differential ratio provided in an embodiment of the present application.

[0108] like Fig.13 As shown, starting the sewing machine and turning on the power is the first step, the electronic control 1 reads the differential ratio database from the storage space, and then selects a differential ratio size from the differential ratio database as the target differential ratio value, and then the electronic control 1 sends a corresponding differential ratio size data signal according to the target differential ratio value to drive the motor assembly 21 to rotate. During the rotation of the motor assembly 21, it is detected whether the differential of the motor assembly 21 reaches the target differential ratio position. If so, when the motor assembly 21 rotates to the corresponding differential ratio position, the electronic control 1 sends a differential adjustment end signal to reset the motor assembly 21 and the sewing machine ends standby; if not, it returns to the step of driving the motor assembly 21 to rotate.

[0109] In an optional embodiment of the present application, when it is detected that the target mechanism to be controlled is a tooth lifting mechanism, the thread trimming mechanism, the presser foot lifting mechanism, the automatic needle distance adjustment mechanism and the automatic differential adjustment mechanism are controlled to stop running.

[0110] In summary, the sewing machine control method provided in the embodiment of the present application first obtains the sewing machine status signal in real time, then determines the target state of the sewing machine and the target mechanism to be controlled according to the sewing machine status signal, and finally controls the motor assembly to drive the cam assembly to drive the target mechanism to be controlled based on the sewing machine target state, so that the target mechanism to be controlled can complete the automatic presser foot lifting, automatic tooth lifting, automatic thread trimming, automatic stitch length adjustment or automatic differential speed ratio adjustment until the sewing machine reaches the target state of the sewing machine. The time cost and labor cost consumed by manual intervention are reduced through automatic control, thereby reducing the use cost of the sewing machine.

[0111] At the same time, the thread trimming mechanism, presser foot lifting mechanism, thread lifting mechanism, automatic stitch length adjustment mechanism and differential adjustment mechanism are driven by the same stepper motor, and the thread trimming mechanism, presser foot lifting mechanism, thread lifting mechanism, automatic stitch length adjustment mechanism and differential adjustment mechanism move according to the preset motion phase relationship. The number of stepper motors in the sewing machine is reduced, thereby reducing the production cost of the sewing machine and being more energy-efficient.

[0112] At the same time, during the operation of the sewing machine, there is no need to manually adjust the tooth inclination. For sewing materials of different thicknesses, you only need to select different tooth inclinations set in the program; according to different sewing stitch length requirements, the stitch length and differential ratio required by the sewing process can be adjusted to achieve better sewing effects with one click; the driving structural parts of the automatic presser foot lifting and thread trimming mechanisms that consume more energy are driven by bearing rolling; at the same time, the motion trajectory of the driving cam is optimized so that when the automatic thread trimming and automatic presser foot lifting mechanisms are working, as the presser foot is lifted and the thread trimming engagement increases, the same motor torque output thread trimming force and presser foot lifting force will increase accordingly.

[0113] Fig.14 A schematic structural diagram of a sewing machine control device provided in an embodiment of the present application.

[0114] like Figure 1As shown, the sewing machine includes: an electronic control 1, a casing 2, a motor assembly 21, a cam 22, a thread trimming mechanism, a presser foot lifting mechanism, a tooth lifting mechanism, an automatic stitch length adjustment mechanism, a differential adjustment mechanism, a transmitting sensor 3, a first receiving sensor 4, a second receiving sensor 5 and a third receiving sensor 6; wherein the electronic control 1 is the control center of the sewing machine, the motor assembly 21 is installed on the casing 2, the motor assembly 21 is fixedly connected with the cam assembly 22 and the thread trimming cam 20 through the motor shaft 21-1, the cam assembly 22 includes a presser foot lifting cam 22-1 and a tooth lifting cam 22-2; the motor assembly 21 and the electronic control 1 are electrically connected to transmit control signals; the thread trimming mechanism, the presser foot lifting mechanism, the tooth lifting mechanism and the automatic stitch length adjustment mechanism all realize power transmission between the cam assembly 22 and the thread trimming cam 20 and the motor assembly 21 to complete the corresponding automatic control action; the transmitting sensor 3, the first receiving sensor 4, the second receiving sensor 5 and the third receiving sensor 6 are all electrically connected to the electronic control 1.

[0115] like Fig.14 As shown, in this embodiment, the sewing machine control device is applied to the electronic control 1 in the sewing machine, and the device includes: a signal acquisition module 1401, a signal processing module 1402 and an automatic control module 1403.

[0116] The signal acquisition module 1401 is used to acquire the sewing machine status signal collected by the first receiving sensor, the second receiving sensor or the third receiving sensor in real time.

[0117] The signal processing module 1402 is used to determine the target state of the sewing machine and the target mechanism to be controlled according to the sewing machine state signal. The target mechanism to be controlled is at least one of the thread trimming mechanism, the presser foot lifting mechanism, the tooth lifting mechanism and the automatic stitch length adjustment mechanism.

[0118] The automatic control module 1403 is used to control the motor assembly to drive the cam assembly to drive the target mechanism to be controlled to operate based on the target state of the sewing machine, so that the target mechanism to be controlled can complete the actions of automatically lifting the presser foot, automatically lifting the teeth, automatically trimming the thread, automatically adjusting the stitch length or automatically adjusting the differential ratio until the sewing machine reaches the target state of the sewing machine.

[0119] In an optional embodiment of the present application, the target mechanism to be controlled is a presser foot lifting mechanism, which includes a target mechanism to be controlled as a presser foot lifting mechanism, which includes a presser foot lifting bearing 211, a presser foot lifting cam 221, a presser foot lifting crank 206, a presser foot lifting rod 205, a locking crank 18, a presser foot shaft 9, a presser foot arm 8 and a presser foot assembly 7; accordingly, the automatic control module 1403 is specifically used to send a control signal to the motor assembly and the target mechanism to be controlled based on the target state of the sewing machine, so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate, including: when it is detected that the target state of the sewing machine is that the presser foot assembly is lifted, the motor shaft 21-1 of the motor assembly 21 is controlled to rotate counterclockwise to drive the bearing, and the surface of the bearing 211 and the surface of the presser foot lifting cam 22-1 are curved in a preset angle range a. The cam assembly 22 drives the presser foot lifting crank 206 to rotate counterclockwise, and in turn drives the presser foot lifting rod 205, the locking crank 18, the presser foot shaft 9, and the presser foot arm 8 to move, so as to drive the presser foot to be lifted; or when it is detected that the target state of the sewing machine is that the presser foot assembly is lifted to the highest position of the preset stroke, the motor assembly 21 is controlled to drive the presser foot lifting cam 22-1 to run in the preset angle b interval, so that the presser foot assembly 7 is located at the highest position of the preset stroke; or when it is detected that the target state of the sewing machine is that the presser foot assembly coincides with the needle plate, the motor assembly 21 is controlled to drive the presser foot lifting cam 22-1 to rotate clockwise, and the presser foot assembly moves downward under the action of the presser foot rod mechanism, and the presser foot lifting bearing 211 returns to the base circle position along the surface of the presser foot lifting cam 22-1, so as to drive the presser foot assembly to coincide with the needle plate.

[0120] In an optional embodiment of the present application, the target mechanism to be controlled is a thread trimming mechanism, which includes a thread trimming bearing 103, a movable knife assembly 11 and a fixed knife 10; accordingly, the automatic control module 1403 is specifically used for: when it is detected that the target state of the sewing machine is the thread trimming state, the motor shaft 21-1 of the motor assembly 21 is controlled to rotate clockwise, and when the surface of the bearing 103 of the motor shaft 21-1 and the surface of the thread trimming cam 20 move in the range of a preset angle d and a preset angle e, the movable knife assembly 11 engages with the fixed knife 10 to complete the thread trimming.

[0121] In an optional embodiment of the present application, the target mechanism to be controlled is a tooth lifting mechanism, which includes a tooth lifting bearing 311, a tooth lifting shaft 305, a tooth lifting crank 301 and a tooth lifting slider 16; accordingly, the automatic control module 1403 is specifically used for: when it is detected that the target state of the sewing machine is the tooth lifting working state, the motor assembly 21 is controlled to start, so that when the motor shaft 21-1 rotates, the tooth lifting cam 22-2 drives the tooth lifting bearing 311 to rotate, and then drives the tooth lifting shaft 305, the tooth lifting crank 301 and the tooth lifting slider 16 to move in turn, so that the tooth lifting slider 16 increases or decreases the tooth inclination, and the working range of the tooth lifting mechanism is the preset angle c range.

[0122] In an optional embodiment of the present application, the automatic control module 1403 is used to control the sewing machine to perform automatic tooth lifting work, and the corresponding sewing machine working state during the tooth lifting working state includes the sewing machine normally executing sewing working state or sewing stop state.

[0123] In an optional embodiment of the present application, the target mechanism to be controlled is an automatic stitch length adjustment mechanism, which includes a main shaft 12 and a cloth feed eccentric assembly 13; accordingly, the automatic control module 1403 is specifically used for: when it is detected that the target state of the sewing machine is the stitch length adjustment state, the motor assembly 21 is controlled to rotate so that the main shaft 12 and the cloth feed eccentric assembly 13 rotate in sequence to change the eccentricity of the cloth feed eccentric wheel assembly 13 to achieve stitch length adjustment.

[0124] In this embodiment, the target mechanism to be controlled is a differential adjustment mechanism; accordingly, the automatic control module 1403 is specifically used to: when it is detected that the target state of the sewing machine is adjusted to a preset differential ratio, select a target differential ratio value from a preset differential ratio database; drive the motor assembly 21 to rotate according to the target differential ratio value until the motor assembly 21 reaches the target differential ratio position.

[0125] The sewing machine control device provided in this embodiment can be used to execute the technical solution of the above-mentioned method embodiment. Its implementation principle and technical effect are similar, and this embodiment will not be repeated here.

[0126] Fig.15 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown in FIG. Fig.15 As shown, the electronic device includes: at least one processor 1501 and a memory 1502.

[0127] The memory 1502 is used to store computer-executable instructions.

[0128] The processor 1501 is used to execute the computer-executable instructions stored in the memory 1502 to implement the various steps involved in the above method embodiment. For details, please refer to the relevant description in the above sewing machine control method embodiment.

[0129] Optionally, the memory 1502 may be independent or integrated with the processor 1501 .

[0130] When the memory 1502 is independently provided, the electronic device further includes a bus 1503 for connecting the memory 1502 and the processor 1501 .

[0131] The embodiment of the present application also provides a computer-readable storage medium, in which computer execution instructions are stored. When the electronic control 1 in the sewing machine executes the computer execution instructions, the above sewing machine control method is implemented.

[0132] An embodiment of the present application also provides a computer program product, including a computer program, which implements the above sewing machine control method when executed by a processor.

[0133] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0134] The modules described above as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to implement the solution of this embodiment.

[0135] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each module may exist physically separately, or two or more modules may be integrated into one unit. The unit composed of the above modules may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0136] The above-mentioned integrated module implemented in the form of a software function module can be stored in a computer-readable storage medium. The above-mentioned software function module is stored in a storage medium, including a number of instructions for enabling a computer device such as a personal computer, a server, or a network device or a processor to perform some steps of the method of each embodiment of the present application.

[0137] It should be understood that the processor may be a central processing unit, CPU for short, or other general-purpose processors, digital signal processors, DSP for short, or application-specific integrated circuits, ASIC for short, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0138] The memory may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk memory, and may also be a USB flash drive, a mobile hard disk, a read-only memory, a magnetic disk or an optical disk, etc.

[0139] The bus can be an Industry Standard Architecture, referred to as an ISA bus, a Peripheral Component Interconnect, referred to as a PCI bus, or an Extended Industry Standard Architecture, referred to as an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0140] The above storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory SRAM, electrically erasable programmable read-only memory EEPROM, erasable programmable read-only memory EPROM, programmable read-only memory PROM, read-only memory ROM, magnetic memory, flash memory, magnetic disk or optical disk. The storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0141] An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the storage medium can also exist as discrete components in an electronic device or a main control device.

[0142] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0143] The present invention is intended to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solution from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sewing machine control method, characterized in that: The sewing machine comprises: an electric control, a housing, a motor assembly, a cam, a thread trimming mechanism, a presser foot lifting mechanism, a tooth lifting mechanism, an automatic needle distance adjustment mechanism, a differential adjustment mechanism, a transmitting sensor, a first receiving sensor, a second receiving sensor and a third receiving sensor; The electric control is the control center of the sewing machine, the motor assembly is mounted on the housing, the motor assembly is fixedly connected to the cam assembly through a motor shaft, the cam assembly includes a presser foot lifting cam, a tooth lifting cam and a thread trimming cam; the motor assembly and the electric control transmit control signals through electrical connection; the thread trimming mechanism, the presser foot lifting mechanism, the tooth lifting mechanism and the automatic needle distance adjustment mechanism all realize power transmission between the cam assembly and the motor assembly to complete the corresponding automatic control action; the transmitting sensor, the first receiving sensor, the second receiving sensor and the third receiving sensor are all electrically connected to the electric control; The sewing machine control method is applied to the electric control in the sewing machine, and comprises: Acquire in real time the sewing machine status signal collected by the first receiving sensor, the second receiving sensor or the third receiving sensor; Determine the target state of the sewing machine and the target mechanism to be controlled according to the sewing machine state signal, wherein the target mechanism to be controlled is at least one of the thread trimming mechanism, the presser foot lifting mechanism, the teeth lifting mechanism and the automatic stitch length adjustment mechanism; Based on the target state of the sewing machine, the motor assembly is controlled to drive the cam assembly to drive the target mechanism to be controlled to operate, so that the target mechanism to be controlled can complete the actions of automatic presser foot lifting, automatic tooth lifting, automatic thread trimming, automatic stitch length adjustment or automatic differential speed ratio adjustment until the sewing machine reaches the target state of the sewing machine.

2. The method according to claim 1, characterized in that The thread trimming mechanism, presser foot lifting mechanism, tooth lifting mechanism, automatic needle distance adjustment mechanism and differential adjustment mechanism are driven by the same stepping motor, and the thread trimming mechanism, presser foot lifting mechanism, tooth lifting mechanism, automatic needle distance adjustment mechanism and differential adjustment mechanism move according to a preset motion phase relationship.

3. The method according to claim 1, characterized in that The target mechanism to be controlled is a presser foot lifting mechanism, which includes a presser foot lifting bearing, a presser foot lifting cam, a presser foot lifting crank, a presser foot lifting rod, a locking crank, a presser foot shaft, a presser foot arm and a presser foot assembly; Correspondingly, sending a control signal to the motor assembly and the target mechanism to be controlled based on the target state of the sewing machine so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate includes: When it is detected that the target state of the sewing machine is that the presser foot assembly is lifted, the motor shaft of the motor assembly is controlled to rotate counterclockwise to drive the bearing, and the surface of the bearing and the surface of the presser foot lifting cam move in a curve within a preset angle a range, and the cam assembly drives the presser foot lifting crank to rotate counterclockwise, and drives the presser foot lifting rod, the locking crank, the presser foot shaft, and the presser foot arm to move in sequence, so as to drive the presser foot to be lifted; or When it is detected that the target state of the sewing machine is that the presser foot assembly is lifted to the highest position of the preset stroke, the motor assembly is controlled to drive the presser foot lifting cam to operate within the preset angle b interval so that the presser foot assembly is located at the highest position of the preset stroke; or When it is detected that the target state of the sewing machine is that the presser foot assembly and the needle plate are in overlapped state, the motor assembly is controlled to drive the presser foot lifting cam to rotate clockwise, the presser foot assembly moves downward under the action of the presser foot rod mechanism, and the presser foot lifting bearing returns to the base circle position along the surface of the presser foot lifting cam to drive the presser foot assembly to overlap with the needle plate.

4. The method according to claim 1, characterized in that: The target mechanism to be controlled is a thread trimming mechanism, which includes a thread trimming bearing, a movable knife assembly and a fixed knife; Correspondingly, sending a control signal to the motor assembly and the target mechanism to be controlled based on the target state of the sewing machine so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate includes: When it is detected that the target state of the sewing machine is the thread trimming state, the motor shaft of the motor assembly is controlled to rotate clockwise. When the thread trimming cam surface and the bearing surface of the motor shaft move between the preset angle d and the preset angle e, the movable knife assembly engages with the fixed knife to complete the thread trimming.

5. The method according to claim 1, characterized in that The target mechanism to be controlled is a tooth lifting mechanism, which includes a tooth lifting bearing, a tooth lifting shaft, a tooth lifting crank and a tooth lifting slider; Correspondingly, sending a control signal to the motor assembly and the target mechanism to be controlled based on the target state of the sewing machine so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate includes: When it is detected that the target state of the sewing machine is the tooth lifting working state, the motor assembly is controlled to start, so that when the motor shaft rotates, the tooth lifting cam drives the tooth lifting bearing to rotate, and then drives the tooth lifting shaft, the tooth lifting crank and the tooth lifting slider to move in turn, so that the tooth lifting slider increases or decreases the tooth inclination. The working range of the tooth lifting mechanism is the preset angle c range.

6. The method according to claim 4, characterized in that The sewing machine working state corresponding to the tooth lifting working state includes a sewing machine normal sewing working state or a sewing stop state.

7. The method according to claim 1, characterized in that The target mechanism to be controlled is an automatic needle distance adjustment mechanism, which includes a main shaft, a cloth feeding eccentric assembly, a driving crank and an automatic button shaft; Correspondingly, sending a control signal to the motor assembly and the target mechanism to be controlled based on the target state of the sewing machine so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate includes: When it is detected that the target state of the sewing machine is the stitch size adjustment state, the motor assembly is controlled to rotate so that the main shaft and the cloth feeding eccentric assembly rotate in sequence to change the eccentricity of the cloth feeding eccentric wheel assembly to achieve stitch size adjustment.

8. The method according to claim 1, characterized in that The target mechanism to be controlled is a differential adjustment mechanism; Correspondingly, sending a control signal to the motor assembly and the target mechanism to be controlled based on the target state of the sewing machine so that the motor assembly drives the cam assembly to drive the target mechanism to be controlled to operate includes: When it is detected that the target state of the sewing machine is adjusted to a preset differential ratio, a target differential ratio value is selected from a preset differential ratio database; The motor assembly is driven to rotate according to the target differential ratio value until the motor assembly reaches the target differential ratio position.

9. The method according to any one of claims 1 to 8, characterized in that Also includes: When it is detected that the target mechanism to be controlled is a tooth lifting mechanism, the thread trimming mechanism, the presser foot lifting mechanism, the automatic needle distance adjustment mechanism and the automatic differential adjustment mechanism are controlled to stop running.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions. When the electronic control in the sewing machine executes the computer-executable instructions, the sewing machine control method according to any one of claims 1 to 9 is implemented.

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