Control system and control method of presser foot lifting mechanism, and sewing machine

Abstract

The present application provides a control system for a presser foot lifting mechanism, a control method thereof, and a sewing machine. The control system for the presser foot lifting mechanism includes a control component, a drive component, a detection component, and a presser foot lifting mechanism. The detection component includes a signal transmitter and three signal receivers, the signal transmitter's transmitting end facing the areas where the three signal receivers are located; the three signal receivers are located near the starting end, middle section, and end end of the feed dog, respectively. The control component controls the drive component based on the information received by the signal transmitter, thereby driving the presser foot lifting mechanism to move upward and downward, thereby reducing noise generated by collisions between the presser foot and the feed dog. The control method for the presser foot lifting mechanism controls the drive component by acquiring and comparing information received by the three signal receivers, thereby driving the presser foot lifting mechanism to move upward and downward, thereby improving the automation level of the presser foot lifting mechanism and the intelligence level of the sewing machine.

Description

Technical Field

[0001] The present application relates to the technical field of sewing machines, and in particular to a control system of a presser foot lifting mechanism and a control method thereof, and a sewing machine. Background Art

[0002] A sewing machine is a machine that sews materials together using thread. It can sew cotton, linen, silk, wool, synthetic fiber and other fabrics as well as leather, plastic and other products, and the stitches are neat, smooth and firm.

[0003] During operation, the sewing machine's needle is fixed to a needle bar, which is controlled by a motor via a spindle, crank, and connecting rod to move up and down. As the needle tip penetrates the sewing material, the thread at the needle tip pulls out a loop from one side of the material to the other. This loop locks with the loop inside the sewing machine, and the loops are then sewn alternately. In the prior art, the presser foot of the sewing machine is always in contact with the feed dog and needle plate during operation.

[0004] However, the above sewing machine generates noise during operation. Summary of the Invention

[0005] The present application provides a control system for a presser foot lifting mechanism, a control method thereof, and a sewing machine. The control system of the presser foot lifting mechanism reduces the collision noise between the presser foot and the feed dog and the needle plate. The control method of the presser foot lifting mechanism improves the automation capability of the presser foot lifting mechanism and improves the intelligence level of the sewing machine.

[0006] In the first aspect, the present application provides a control system for a presser foot lifting mechanism, which is used in a sewing machine. The control system of the presser foot lifting mechanism includes a control component, a driving component, a detection component and a presser foot lifting mechanism; the driving component, the detection component and the presser foot lifting mechanism are all electrically connected to the control component.

[0007] The presser foot lifting mechanism is connected to the driving member, and the driving member is configured to drive the presser foot lifting mechanism to move up and down.

[0008] The detection component includes a signal sending component, a first signal receiving component, a second signal receiving component and a third signal receiving component; the first signal receiving component, the second signal receiving component and the third signal receiving component are arranged on one side of the feed dog of the sewing machine, the first signal receiving component is close to the starting end of the feed dog, the second signal receiving component is close to the middle section of the feed dog; the third signal receiving component is close to the ending end of the feed dog; the sending end of the signal sending component faces the area where the first signal receiving component, the second signal receiving component and the third signal receiving component are located.

[0009] The control component is configured to control the driving component according to the receiving information of the first signal receiving component, the second signal receiving component and the third signal receiving component, so as to drive the presser foot lifting mechanism to move up and down.

[0010] In the control system of the above-mentioned presser foot lifting mechanism, optionally, the signal sending component includes a first sending part, a second sending part and a third sending part, the sending end of the first sending part is toward the first signal receiving part, the sending end of the second sending part is toward the second signal receiving part, and the sending end of the third sending part is toward the third signal receiving part.

[0011] In the control system of the above-mentioned presser foot lifting mechanism, it is optional to further include: a front needle lifting number detection component, a rear needle lifting number detection component, a presser foot height detection component and a presser foot moving speed detection component, and the front needle lifting number detection component, the rear needle lifting number detection component, the presser foot height detection component and the presser foot moving speed detection component are all electrically connected to the control component.

[0012] In a second aspect, the present application provides a control method for a presser foot lifting mechanism, which is applied to the control system of the above-mentioned presser foot lifting mechanism. The control method for the presser foot lifting mechanism includes:

[0013] Acquire first reception information of the first signal receiving component, second reception information of the second signal receiving component, and third reception information of the third signal receiving component;

[0014] According to the first received information, the second received information and the third received information, the driving member is controlled to drive the presser foot lifting mechanism to move up and down.

[0015] In the above-mentioned control method of the presser foot lifting mechanism, optionally, the control method of the presser foot lifting mechanism specifically includes:

[0016] Determining a correspondence between the first received information, the second received information, and the third received information and preset information;

[0017] When the first received information corresponds to the preset information, and the second received information and the third received information do not correspond to the preset information, the driving member is controlled to drive the presser foot lifting mechanism to descend;

[0018] When the first received information and the second received information correspond to the preset information, or when the second received information and the third received information correspond to the preset information, controlling the driving member to keep the presser foot lifting mechanism in a descending state;

[0019] When the third received information corresponds to the preset information, and the first received information and the second received information do not correspond to the preset information, the driving member is controlled to drive the presser foot lifting mechanism to lift.

[0020] In the above-mentioned control method of the presser foot lifting mechanism, optionally, when the first received information corresponds to the preset information, controlling the driving member to drive the presser foot lifting mechanism to descend, further comprises:

[0021] When the first received information corresponds to the preset information, and the second received information and the third received information do not correspond to the preset information, obtaining a first operating stitch number of the sewing needle;

[0022] Determine the relationship between the number of first running stitches and the number of front lift stitches;

[0023] When the number of first running stitches is greater than or equal to the number of front lifting stitches, the driving member is controlled to drive the presser foot lifting mechanism to descend.

[0024] In the above-mentioned control method of the presser foot lifting mechanism, optionally, when the third received information corresponds to the preset information, and the first received information and the second received information do not correspond to the preset information, controlling the driving member to drive the presser foot lifting mechanism to lift, further includes:

[0025] When the third received information corresponds to the preset information, and the first received information and the second received information do not correspond to the preset information, obtaining a second operating stitch number of the sewing needle;

[0026] Determine the relationship between the number of second running stitches and the number of back lift stitches;

[0027] When the second running stitch number is greater than or equal to the rear lifting stitch number, the driving member is controlled to drive the presser foot lifting mechanism to lift.

[0028] In the above-mentioned control method of the presser foot lifting mechanism, optionally, when controlling the driving member to drive the presser foot lifting mechanism to lift, the method further includes:

[0029] Get the lifting speed of the presser foot;

[0030] Determine the relationship between the lifting speed and the preset lifting speed range;

[0031] When the lifting speed is outside the preset lifting speed range, the driving member is controlled to adjust the lifting speed of the presser foot until the lifting speed of the presser foot is within the preset lifting speed range;

[0032] Alternatively, when the driving member is controlled to drive the presser foot lifting mechanism to descend, the process also includes:

[0033] Get the descending speed of the presser foot;

[0034] Determine the relationship between the descent speed and the preset descent speed range;

[0035] When the descending speed is outside the preset descending speed range, the driving member is controlled to adjust the descending speed of the presser foot until the descending speed of the presser foot is within the preset descending speed range.

[0036] In the above-mentioned control method of the presser foot lifting mechanism, optionally, when controlling the driving member to drive the presser foot lifting mechanism to lift or lower, the method further includes:

[0037] Get the height of the presser foot;

[0038] Determine the relationship between the height of the presser foot and the preset height range;

[0039] When the height of the presser foot is outside the preset height range, the driving member is controlled to adjust the height of the presser foot until the height of the presser foot is within the preset height range.

[0040] In a third aspect, the present application provides a sewing machine including a control system of the above-mentioned presser foot lifting mechanism.

[0041] The present application provides a control system for a presser foot lifting mechanism, a control method thereof, and a sewing machine. The presser foot lifting mechanism control system includes a control component, a drive component, a detection component, and a presser foot lifting mechanism. The drive component, the detection component, and the presser foot lifting mechanism are all electrically connected to the control component. The detection component includes a signal transmitter, a first signal receiver, a second signal receiver, and a third signal receiver. The first signal receiver, the second signal receiver, and the third signal receiver are respectively located near the starting end, middle section, and end end of the feed dog. Thus, the control component controls the drive component based on information received by the first signal receiver, the second signal receiver, and the third signal receiver, thereby driving the presser foot lifting mechanism to rise and fall. When there is no sewing material on the feed dog, the control method of the presser foot lifting mechanism avoids friction and collision between the presser foot of the presser foot lifting mechanism and the feed dog, reduces noise generated by collision between the presser foot lifting mechanism and the feed dog, and increases the service life of the presser foot lifting mechanism and the feed dog.

[0042] The present application provides a control method for a presser foot lifting mechanism, which controls a driving component by acquiring and comparing reception information of a first signal receiving component, a second signal receiving component, and a third signal receiving component, thereby driving the presser foot lifting mechanism to rise and fall, thereby improving the automation level of the presser foot lifting mechanism and the intelligence level of the sewing machine.

[0043] The structure of the present application and its other practical purposes and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction 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 any creative work.

[0045] Figure 1 A schematic structural diagram of a sewing machine from a first perspective provided in an embodiment of the present application;

[0046] Figure 2 A schematic structural diagram of a sewing machine from a second perspective provided in an embodiment of the present application;

[0047] Figure 3 A partially enlarged view of the sewing machine provided in an embodiment of the present application;

[0048] Figure 4 The electrical connection relationship between the driving component, presser foot lifting mechanism, detection component and control component of the control system of the presser foot lifting mechanism provided in the embodiment of the application;

[0049] Figure 5 The electrical connection relationship between the front needle lift number detection component, the rear needle lift number detection component, the presser foot height detection component, the presser foot movement speed detection component and the control component of the control system of the presser foot lifting mechanism provided in the embodiment of the application;

[0050] Figure 6 A flow chart of a control method for a presser foot lifting mechanism according to an embodiment of the present application;

[0051] Figure 7 A schematic flow chart of the comparison of received information in the control method of the presser foot lifting mechanism provided in an embodiment of the present application;

[0052] Figure 8 A schematic flow chart of the movement of a sewing needle during the descent of a presser foot lifting mechanism in a method for controlling a presser foot lifting mechanism according to an embodiment of the present invention;

[0053] Figure 9 A schematic flow chart of the movement of a sewing needle during the lifting process of the presser foot lifting mechanism of the control method of the presser foot lifting mechanism provided in an embodiment of the present application;

[0054] Figure 10a A schematic flow chart of the presser foot lifting speed during the presser foot lifting process of the presser foot lifting mechanism control method provided in an embodiment of the present application;

[0055] Figure 10b A schematic flow chart of the presser foot descending speed during the descending process of the presser foot lifting mechanism of the control method of the presser foot lifting mechanism provided in an embodiment of the present application;

[0056] Figure 11 A schematic flow chart of the presser foot height during the lifting process of the presser foot lifting mechanism of the control method of the presser foot lifting mechanism provided in an embodiment of the present application.

[0057] Description of reference numerals:

[0058] 100: Detection component; 200: Driving component; 300: Presser foot lifting mechanism; 400: Control component; 500: Feed dog; 600: Front needle lift detection component; 700: Rear needle lift detection component; 800: Presser foot height detection component; 900: Presser foot movement speed detection component;

[0059] 101: signal sending element; 102: first signal receiving element; 103: second signal receiving element; 104: third signal receiving element;

[0060] 201: Presser foot.

[0061] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0062] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0063] During actual research, the inventors of this application discovered that in existing sewing machines, the sewing needle is fixed to a needle bar, which is driven up and down by a motor via a series of spindles, connecting rods, and cranks. At the start of each stitch, the sewing needle penetrates the material and pulls out a loop of thread. A loop-forming device inside the sewing machine grabs the loop before the needle is pulled out, and this device moves synchronously with the sewing needle. Once the sewing needle pulls out of the material, the feed dog pulls the material forward. When the sewing needle penetrates the material again, the loop of thread drawn by the sewing needle locks with the loop of the loop-forming device, and the loops are then sewn alternately. This is how the sewing process proceeds.

[0064] The presser foot plays a crucial role in the sewing process, working in conjunction with the feed dogs to secure and move the fabric on the machine. However, during the machine's operation, the presser foot is constantly in contact with the feed dogs and needle plate. When there's no material to sew, the presser foot collides with the running feed dogs, creating noise and increasing wear on the presser foot and feed dogs, reducing their service life.

[0065] In view of this, an embodiment of the present application provides a control system for a presser foot lifting mechanism, a control method thereof, and a sewing machine. The presser foot lifting mechanism control system includes a control component, a drive component, a detection component, and a presser foot lifting mechanism; wherein the drive component, the detection component, and the presser foot lifting mechanism are all electrically connected to the control component; the detection component includes a signal transmitting component, a first signal receiving component, a second signal receiving component, and a third signal receiving component; the first signal receiving component, the second signal receiving component, and the third signal receiving component are respectively located near the starting end, middle section, and end end of the feed dog. In this way, the control component controls the drive component based on the information received by the first signal receiving component, the second signal receiving component, and the third signal receiving component, thereby driving the presser foot lifting mechanism to rise and fall. In this way, when there is no sewing material on the feed dog, friction and collision between the presser foot of the presser foot lifting mechanism and the feed dog are avoided, noise generated by collision between the presser foot of the presser foot lifting mechanism and the feed dog is reduced, and the service life of the presser foot lifting mechanism and the feed dog is increased.

[0066] An embodiment of the present application provides a control method for a presser foot lifting mechanism, which controls a driving component by acquiring and comparing reception information of a first signal receiving component, a second signal receiving component, and a third signal receiving component to drive the presser foot lifting mechanism to rise and fall, thereby improving the automation level of the presser foot lifting mechanism and the intelligence level of the sewing machine.

[0067] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0068] First, refer to Figure 1 and Figure 4 As shown, an embodiment of the present application provides a control system for a presser foot lifting mechanism, which is used for a sewing machine. The control system for the presser foot lifting mechanism includes a control component 400, a driving component 200, a detection component 100 and a presser foot lifting mechanism 300; the driving component 200, the detection component 100 and the presser foot lifting mechanism 300 are all electrically connected to the control component 400.

[0069] The presser foot lifting mechanism 300 is connected to the driving member 200 , and the driving member 200 is configured to drive the presser foot lifting mechanism 300 to move up and down.

[0070] The detection component 100 includes a signal sending component 101, a first signal receiving component 102, a second signal receiving component 103 and a third signal receiving component 104; the first signal receiving component 102, the second signal receiving component 103 and the third signal receiving component 104 are arranged on one side of the feed dog 500 of the sewing machine, the first signal receiving component 102 is close to the starting end of the feed dog 500, and the second signal receiving component 103 is close to the middle section of the feed dog 500; the third signal receiving component 104 is close to the ending end of the feed dog 500; the sending end of the signal sending component 101 is facing the area where the first signal receiving component 102, the second signal receiving component 103 and the third signal receiving component 104 are located.

[0071] The control component 400 is configured to control the driving component 200 according to the information received by the first signal receiving component 102 , the second signal receiving component 103 and the third signal receiving component 104 , so as to drive the presser foot lifting mechanism 300 to move up and down.

[0072] For example, refer to Figure 1 and Figure 2 As shown, after the sewing machine is started, when the control switch of the control system of the presser foot lifting mechanism is in the on state, the first signal receiving element 102, the second signal receiving element 103, and the third signal receiving element 104 of the detection component 100 obtain information that there is no seamless material on the feed dog 500, and the transmitting end of the signal transmitting element 101 obtains the received information of the first signal receiving element 102, the second signal receiving element 103, and the third signal receiving element 104, and transmits the received information to the control element 400 electrically connected thereto, and then the control element 400 gives an instruction to the driving element 200. Subsequently, the driving element 200 drives the presser foot lifting mechanism 300 to lift or lower.

[0073] In this way, when the control part 400 obtains the information that there is no sewing material on the feed dog 500, the presser foot lifting mechanism 300 is lifted, and the presser foot and the feed dog 500 are no longer in contact, which reduces the noise generated by the collision between the presser foot 201 and the feed dog 500 and increases the service life of the presser foot 201 and the feed dog 500.

[0074] For example, refer to Figure 1 and Figure 2 As shown, when the driving member 200 is in the first working mode, the output shaft of the driving member 200 rotates clockwise to drive the presser foot lifting mechanism 300 to lift; when the driving member 200 is in the second working mode, the output shaft of the driving member 200 rotates counterclockwise to drive the presser foot lifting mechanism 300 to descend.

[0075] For example, the control component 400 may be a control chip, and the driving component 200 may be a driving motor.

[0076] For example, refer to Figure 3As shown, the point where the sewing material initially contacts the feed dog 500 is the starting end of the feed dog 500, and the point where the sewing material leaves the feed dog 500 is the ending end of the feed dog 500. The middle position of the feed dog 500 from the starting end to the ending end of the feed dog 500 is the middle section of the feed dog 500. This middle section can be closer to the starting end, closer to the ending end, or the distance between the starting end and the ending end is equal, and this is not limited in this embodiment.

[0077] As a feasible implementation, the signal sending component 101 includes a first sending part, a second sending part and a third sending part. The sending end of the first sending part faces the first signal receiving component 102, the sending end of the second sending part faces the second signal receiving component 103, and the sending end of the third sending part faces the third signal receiving component 104.

[0078] For example, the signal transmitter 101 is used to obtain reception information from the first signal receiver 102, the second signal receiver 103, and the third signal receiver 104. The transmitting ends of the first, second, and third transmitters are respectively directed toward the first, second, and third signal receivers 102, 103, and 104, thereby obtaining reception information from the first, second, and third signal receivers 102, 103, and 104. The first, second, and third signal receivers 102, 103, and 104, respectively, receive information regarding the presence of sewing material at the starting, middle, and ending ends of the feed dog 500.

[0079] For example, the signal sending element 101 may be a transmitting sensor, and the first signal receiving element 102 , the second signal receiving element 103 , and the third signal receiving element 104 may be receiving sensors.

[0080] As a feasible implementation method, refer to Figure 5 As shown, the control system of the presser foot lifting mechanism also includes: a front needle lifting number detection component 600, a rear needle lifting number detection component 700, a presser foot height detection component 800 and a presser foot moving speed detection component 900. The front needle lifting number detection component 600, the rear needle lifting number detection component 700, the presser foot height detection component 800 and the presser foot moving speed detection component 900 are all electrically connected to the control component 400.

[0081] For example, the front needle lift number detection member 600 is used to detect the number of times the sewing needle of the sewing machine moves up and down on the sewing material after the sewing material passes the starting end of the feed dog 500.

[0082] The rear needle lift number detection part 700 is used to detect the number of times the sewing needle moves up and down on the sewing material after the sewing material passes the terminal end of the feed dog 500 when there is no sewing material at the starting end and middle section of the feed dog 500.

[0083] The presser foot height detector 800 is used to detect the height between the presser foot 201 of the presser foot lifting mechanism 300 and the needle plate. The presser foot movement speed detector 900 is used to detect the speed at which the presser foot of the presser foot lifting mechanism 300 rises or falls.

[0084] For example, the front needle lift number detection member 600 and the rear needle lift number detection member 700 may be receiving sensors, the presser foot height detection member 800 may be a height sensor, and the presser foot movement speed detection member 900 may be a speed sensor.

[0085] In some embodiments, the control system of the presser foot lifting mechanism also includes an operation screen, which is electrically connected to the control component 400. The operator can input the number of times the sewing needle moves up and down that the front needle lifting number detection component 600 needs to detect and the number of times the sewing needle moves up and down that the rear needle lifting number detection component 700 needs to detect on the operation screen.

[0086] In other embodiments, the operator can input a desired presser foot height range and presser foot movement speed range on the operation screen. The control member 400 controls the rotational speed of the output shaft of the driver 200, thereby causing the presser foot of the presser foot lifting mechanism 300 to move within the set presser foot movement speed range. The control member 400 controls the driver 200, which drives the presser foot lifting mechanism 300 to raise or lower the presser foot to the set presser foot height range.

[0087] Secondly, refer to Figure 6 As shown, the present application provides a control method for a presser foot lifting mechanism, which is applied to the control system of the above-mentioned presser foot lifting mechanism. The control method for the presser foot lifting mechanism includes:

[0088] S100: Acquire first reception information of the first signal receiving component, second reception information of the second signal receiving component, and third reception information of the third signal receiving component.

[0089] S200: Controlling the driving member to drive the presser foot lifting mechanism to move up and down according to the first received information, the second received information, and the third received information.

[0090] For example, when the sewing machine is started, the feed dog 500 activates and begins to move the sewing material along the starting end to the ending end of the feed dog 500. The sewing material first passes the starting end of the feed dog 500, and the first signal receiving element 102 receives a first reception signal. Then, the sewing material passes the middle section of the feed dog 500, and the second signal receiving element 103 receives a second reception signal. Finally, the sewing material passes the ending end of the feed dog 500, and the third signal receiving element 104 receives a third reception signal.

[0091] During this process, the first signal receiving component 102, the second signal receiving component 103 and the third signal receiving component 104 respectively continuously obtain the first receiving information, the second receiving information and the third receiving information. According to the first receiving information, the second receiving information and the third receiving information, the control component 400 controls the driving component 200 according to the received receiving information, thereby driving the presser foot lifting mechanism 300 to rise and fall.

[0092] In this way, the control member 400 controls the driving member 200 according to the information on the presence or absence of sewing materials, and the driving member 200 drives the presser foot lifting mechanism 300 to automatically rise or fall, thereby improving the automation level of the presser foot lifting mechanism 300.

[0093] As a feasible implementation method, refer to Figure 7 As shown, the control method of the presser foot lifting mechanism specifically includes:

[0094] S201: Determine the correspondence between the first received information, the second received information, the third received information and the preset information;

[0095] S202: When the first received information corresponds to the preset information, and the second received information and the third received information do not correspond to the preset information, controlling the driving member to drive the presser foot lifting mechanism to descend;

[0096] S203: When the first received information and the second received information correspond to the preset information, or when the second received information and the third received information correspond to the preset information, controlling the driving member to keep the presser foot lifting mechanism in a lowered state;

[0097] S204: When the third received information corresponds to the preset information, and the first received information and the second received information do not correspond to the preset information, the driving member is controlled to drive the presser foot lifting mechanism to lift.

[0098] In some embodiments, the first signal receiving component 102, the second signal receiving component 103, and the third signal receiving component 104 convert the first, second, and third received information into digital information, respectively. The signal transmitting component 101 transmits this digital information to the control component 400 for comparison with preset information, which is also digital information. After determining the correspondence between the first, second, and third received information and the preset information, the control component 400 controls the driving component 200 to drive the presser foot lifting mechanism 300 to raise or lower.

[0099] In other embodiments, the first received information, the second received information and the third received information are light brightness signals. The signal sending component 101 transmits the light brightness signal to the control component 400 to compare with the preset information. The light brightness signal is the numerical range of the light brightness. The preset information is the numerical range of the light brightness. The relationship between the light brightness range of the first received information, the second received information and the third received information and the numerical range of the preset information is judged. The control component 400 controls the driving component 200 to drive the presser foot lifting mechanism 300 to rise or fall.

[0100] As a feasible implementation method, refer to Figure 8 As shown, when the first received information corresponds to the preset information, the driving member 200 is controlled to drive the presser foot lifting mechanism 300 to descend, and the process also includes:

[0101] S211: when the first received information corresponds to the preset information, and the second received information and the third received information do not correspond to the preset information, obtaining a first operating stitch number of the sewing needle;

[0102] S212: Determine the relationship between the number of first running stitches and the number of front lifting stitches;

[0103] S213: When the number of first running stitches is greater than or equal to the number of front lifting stitches, the driving member is controlled to drive the presser foot lifting mechanism to descend.

[0104] For example, when the sewing material passes the starting end of the feed dog 500, the first signal receiving element 102 near the starting end of the feed dog 500 receives first reception information, which corresponds to the preset information. At this time, the sewing material has not yet passed the middle section of the feed dog 500 or the ending end of the feed dog 500, so the second reception information received by the second signal receiving element 103 and the third reception information received by the third signal receiving element 104 do not correspond to the preset information.

[0105] Before the presser foot lifting mechanism 300 descends, the front lift number detector 600 detects the first running stitch count of the sewing needle, that is, the number of times the sewing needle moves up and down, after the sewing material passes the starting end of the feed dog 500. The front lift number detector 600 transmits a signal to the control component 400, which compares the first running stitch count with the front lift number. When the first running stitch count is greater than or equal to the front lift number, the control component 400 controls the driving component 200 to drive the presser foot lifting mechanism 300 to descend, at which point the sewing machine begins sewing the material.

[0106] As a feasible implementation method, refer to Figure 9 As shown, when the third received information corresponds to the preset information, and the first received information and the second received information do not correspond to the preset information, the driving member 200 is controlled to drive the presser foot lifting mechanism 300 to lift, and the process also includes:

[0107] S221: when the third received information corresponds to the preset information, and the first received information and the second received information do not correspond to the preset information, obtaining a second operating stitch number of the sewing needle;

[0108] S222: Determine the relationship between the second running stitch number and the rear lifting stitch number;

[0109] S223: When the second running stitch number is greater than or equal to the rear lifting stitch number, the driving member is controlled to drive the presser foot lifting mechanism to lift.

[0110] For example, during the operation of the sewing machine, the sewing material sequentially passes through the starting end, middle section, and end section of the feed dog 500. When the sewing machine is about to stop sewing the material, there is no sewing material at the starting end and middle section of the feed dog 500. At this time, the first reception information obtained by the first signal receiving element 102 and the second reception information obtained by the second signal receiving element 103 do not correspond to the preset information, while the third reception information obtained by the third signal receiving element 104 corresponds to the preset information.

[0111] Before the presser foot lifting mechanism 300 rises, the rear lift needle count detector 700 detects the second operating stitch count of the sewing needle after the sewing material passes the end of the feed dog 500, that is, the number of times the sewing needle moves up and down. The rear lift needle count detector 700 transmits a signal to the control component 400, which compares the second operating stitch count with the rear lift needle count. When the second operating stitch count is greater than or equal to the rear lift needle count, the control component 400 controls the driving component 200 to drive the presser foot lifting mechanism 300 to descend, at which point the sewing machine ends sewing the material.

[0112] As a feasible implementation method, refer to Figure 10a As shown, when the driving member 200 is controlled to drive the presser foot lifting mechanism 300 to lift, the following steps are also included:

[0113] S301: Obtaining the lifting speed of the presser foot;

[0114] S302: Determine the relationship between the lifting speed and a preset lifting speed range;

[0115] S303: When the lifting speed is outside the preset lifting speed range, controlling the driving member to adjust the lifting speed of the presser foot until the lifting speed of the presser foot is within the preset lifting speed range;

[0116] In some embodiments, reference Figure 10b As shown, when the driving member 200 is controlled to drive the presser foot lifting mechanism 300 to descend, the following steps are also included:

[0117] S401: Obtaining the descending speed of the presser foot;

[0118] S402: Determine the relationship between the descent speed and a preset descent speed range;

[0119] S403: When the descending speed is outside the preset descending speed range, controlling the driving member to adjust the descending speed of the presser foot until the descending speed of the presser foot is within the preset descending speed range.

[0120] In some embodiments, during the lifting process of the presser foot lifting mechanism 300, the presser foot movement speed detection component 900 obtains the lifting speed of the presser foot, and the control component 400 compares the lifting speed with a preset lifting speed range. When the lifting speed is less than the preset lifting speed range, the control component 400 controls the driving component 200 to accelerate the rotation speed of the output shaft of the driving component 200, thereby adjusting the presser foot lifting speed of the presser foot lifting mechanism 300. When the lifting speed is greater than the preset lifting speed range, the control component 400 controls the driving component 200 to slow down the rotation speed of the output shaft of the driving component 200, thereby adjusting the lifting speed of the presser foot 201 of the presser foot lifting mechanism 300.

[0121] Subsequently, the presser foot movement speed detecting member 900 continues to obtain the lifting speed of the presser foot until the presser foot lifting speed is within the preset lifting speed range.

[0122] In other embodiments, during the descent of the presser foot lifting mechanism 300, the presser foot movement speed detection component 900 obtains the descent speed of the presser foot, and the control component 400 compares the descent speed with the preset descent speed range. When the descent speed is less than the preset descent speed range, the control component 400 controls the driving component 200, and the rotation speed of the output shaft of the driving component 200 is accelerated, thereby adjusting the presser foot descent speed of the presser foot lifting mechanism 300.

[0123] When the descending speed is greater than the preset descending speed range, the control member 400 controls the driving member 200 , and the rotation speed of the output shaft of the driving member 200 decreases, thereby adjusting the presser foot descending speed of the presser foot lifting mechanism 300 .

[0124] Subsequently, the presser foot movement speed detection component 900 continues to obtain the descent speed of the presser foot until the descent speed of the presser foot is within the preset descent speed range.

[0125] As a feasible implementation method, refer to Figure 11 As shown, when the driving member is controlled to drive the presser foot lifting mechanism to lift or lower, the following steps are also included:

[0126] S501: Obtain the height of the presser foot;

[0127] S502: Determine the relationship between the height of the presser foot and the preset height range;

[0128] S503: When the height of the presser foot is outside the preset height range, the driving member is controlled to adjust the height of the presser foot until the height of the presser foot is within the preset height range.

[0129] In some embodiments, during the lifting process of the presser foot lifting mechanism 300, the presser foot height detection component 800 obtains the height of the presser foot 201, and the control component 400 compares the height of the presser foot 201 with the preset height range. When the height of the presser foot 201 is less than the preset height range, the control component 400 controls the driving component 200, and the driving component 200 continues to rotate clockwise, driving the presser foot 201 to rise.

[0130] Subsequently, the presser foot height detector 800 continues to obtain the height of the presser foot 201 until the height of the presser foot 201 is within the preset height range.

[0131] In other embodiments, during the descent of the presser foot lifting mechanism 300, the presser foot height detecting component 800 obtains the height of the presser foot 201, and the control component 400 compares the height of the presser foot 201 with a preset height range. When the height of the presser foot 201 is greater than the preset height range, the control component 400 controls the driving component 200, and the driving component 200 continues to rotate counterclockwise, driving the presser foot 201 to descend.

[0132] Subsequently, the presser foot height detecting member 800 continues to obtain the height of the presser foot 201 until the presser foot height is within a preset height range.

[0133] In a third aspect, the present application provides a sewing machine including a control system of the above-mentioned presser foot lifting mechanism.

[0134] For example, the sewing machine includes a sewing machine housing, a control chip, a drive motor and a presser foot lifting mechanism 300 arranged on the housing, and the sewing machine housing is also provided with a work table, on which a needle plate, a feed dog 500 and several sensors are provided.

[0135] For example, when a sewing machine includes the control system of the presser foot lifting mechanism, the automation level of the sewing machine will be improved.

[0136] It can be understood that, since the sewing machine of the present invention includes the technical solution of the embodiment of the control system of the above-mentioned presser foot lifting mechanism, it at least has the beneficial effects brought by the technical solution of the above-mentioned embodiment, which will not be described one by one here.

[0137] In the above description, it should be understood that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In the description of this application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0138] The terms "first," "second," "third," "fourth," etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the numbers used in this way are interchangeable where appropriate so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or apparatus.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A control system for a presser foot lifting mechanism, characterized in that: For a sewing machine, the control system of the presser foot lifting mechanism includes a control component, a driving component, a detection component and a presser foot lifting mechanism; the driving component, the detection component and the presser foot lifting mechanism are all electrically connected to the control component; The presser foot lifting mechanism is connected to the driving member, and the driving member is configured to drive the presser foot lifting mechanism to move up and down; The detection component includes a signal sending component, a first signal receiving component, a second signal receiving component and a third signal receiving component, wherein the first signal receiving component, the second signal receiving component and the third signal receiving component are all used to obtain information on whether there is seamless material on the feed dog of the sewing machine; the first signal receiving component, the second signal receiving component and the third signal receiving component are arranged on one side of the feed dog of the sewing machine, the first signal receiving component is close to the starting end of the feed dog, the second signal receiving component is close to the middle section of the feed dog; the third signal receiving component is close to the ending end of the feed dog; the sending end of the signal sending component faces the area where the first signal receiving component, the second signal receiving component and the third signal receiving component are located; The control component is configured to control the driving component according to the information received by the first signal receiving component, the second signal receiving component and the third signal receiving component, so as to drive the presser foot lifting mechanism to move up and down; When the information obtained by the first signal receiving component and the second signal receiving component is that there is no seamless material, and the information obtained by the third signal receiving component is that there is a seam, the control component controls the driving component to drive the presser foot lifting mechanism to lift.

2. The control system of the presser foot lifting mechanism according to claim 1, characterized in that: The signal sending component includes a first sending part, a second sending part and a third sending part. The sending end of the first sending part faces the first signal receiving part, the sending end of the second sending part faces the second signal receiving part, and the sending end of the third sending part faces the third signal receiving part.

3. The control system of the presser foot lifting mechanism according to claim 2, characterized in that: Also includes: The front needle lift number detection component, the rear needle lift number detection component, the presser foot height detection component and the presser foot movement speed detection component are all electrically connected to the control component.

4. A control method for a presser foot lifting mechanism, characterized in that: The control system of the presser foot lifting mechanism applied to any one of claims 1 to 3, wherein the control method of the presser foot lifting mechanism comprises: Acquire first reception information of the first signal receiving component, second reception information of the second signal receiving component, and third reception information of the third signal receiving component; According to the first received information, the second received information and the third received information, the driving member is controlled to drive the presser foot lifting mechanism to move up and down.

5. The control method of the presser foot lifting mechanism according to claim 4, characterized in that: The control method of the presser foot lifting mechanism specifically includes: Determining a correspondence between the first received information, the second received information, and the third received information and preset information; When the first received information corresponds to the preset information, and the second received information and the third received information do not correspond to the preset information, controlling the driving member to drive the presser foot lifting mechanism to descend; When the first received information and the second received information correspond to the preset information, or when the second received information and the third received information correspond to the preset information, controlling the driving member to keep the presser foot lifting mechanism in a descending state; When the third received information corresponds to the preset information, and the first received information and the second received information do not correspond to the preset information, the driving member is controlled to drive the presser foot lifting mechanism to lift.

6. The control method of the presser foot lifting mechanism according to claim 5, characterized in that: When the first received information corresponds to the preset information, the driving member is controlled to drive the presser foot lifting mechanism to descend, and the process further includes: When the first received information corresponds to the preset information, and the second received information and the third received information do not correspond to the preset information, obtaining a first operating stitch count of the sewing needle; Determining the relationship between the first running stitch number and the front lifting stitch number; When the first running stitch number is greater than or equal to the front lifting stitch number, the driving member is controlled to drive the presser foot lifting mechanism to descend.

7. The control method of the presser foot lifting mechanism according to claim 5, characterized in that: When the third received information corresponds to the preset information, and the first received information and the second received information do not correspond to the preset information, controlling the driving member to drive the presser foot lifting mechanism to lift, further comprising: When the third received information corresponds to the preset information, and the first received information and the second received information do not correspond to the preset information, obtaining a second operating stitch count of the sewing needle; Determining the relationship between the second running stitch number and the rear lifting stitch number; When the second running stitch number is greater than or equal to the rear lifting stitch number, the driving member is controlled to drive the presser foot lifting mechanism to lift.

8. The control method of the presser foot lifting mechanism according to claim 5, characterized in that: When the driving member is controlled to drive the presser foot lifting mechanism to lift, the process also includes: Get the lifting speed of the presser foot; Determining a relationship between the lifting speed and a preset lifting speed range; When the lifting speed is outside the preset lifting speed range, controlling the driving member to adjust the lifting speed of the presser foot until the lifting speed of the presser foot is within the preset lifting speed range; Alternatively, when controlling the driving member to drive the presser foot lifting mechanism to descend, the method further includes: Obtaining the descending speed of the presser foot; Determining a relationship between the descent speed and a preset descent speed range; When the descending speed is outside the preset descending speed range, the driving member is controlled to adjust the descending speed of the presser foot until the descending speed of the presser foot is within the preset descending speed range.

9. The control method of the presser foot lifting mechanism according to claim 5, characterized in that: When the driving member is controlled to drive the presser foot lifting mechanism to lift or lower, the process also includes: Get the height of the presser foot; Determining the relationship between the height of the presser foot and a preset height range; When the height of the presser foot is outside the preset height range, the driving member is controlled to adjust the height of the presser foot until the height of the presser foot is within the preset height range.

10. A sewing machine, characterized in that: A control system comprising the presser foot lifting mechanism according to any one of claims 1 to 3.

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