Embroidery machine with presser foot alarm assembly and alarm method thereof

Abstract

The embodiment of the invention generally relates to the field of embroidery machines, in particular to an embroidery machine with a presser foot alarm assembly and an alarm method of the embroidery machine. Comprising a needle bar frame used for installing a needle bar and a presser foot matched with the needle bar. The presser foot alarm assembly and the presser foot are located on the two sides of the needle bar respectively, and the presser foot alarm assembly comprises a first conductive shaft which extends in the arrangement direction of the needle bar of the embroidery machine; the second conductive shaft extends along the arrangement direction of needle bars of the embroidery machine, a conductive connecting piece is rotatably mounted on the second conductive shaft, and a matching part of the conductive connecting piece is used for being jacked up when a presser foot corresponding to the conductive connecting piece is in a high position; therefore, the conductive connecting piece is driven to rotate from a normal position where the electric contact part of the conductive connecting piece is in electric contact with the first conductive shaft to a working position where the electric contact part is separated from the second conductive shaft, and returns to the normal position when the presser foot is in a low position. Whether the position of the presser foot is abnormal can be verified in real time, so that embroidery quality and equipment operation safety are guaranteed.

Description

Technical Field

[0001] The embodiments disclosed herein generally relate to the field of embroidery machines, and more specifically to an embroidery machine with a presser foot alarm component and an alarm method thereof. Background Technology

[0002] Embroidery machines require presser feet to hold the fabric in place, preventing shifting and wrinkling during embroidery and ensuring precise and neat stitches. In embroidery machines with independently controlled presser feet, the presser feet are driven independently by cams, linkages, and other mechanisms. This results in lower transmission precision and a lack of presser foot holding mechanisms. Drive malfunctions, signal deviations, or external resistance interference can easily cause the presser foot to fail to reach its proper position or lift abnormally, leading to embroidery defects or even damage to the machine head. Therefore, a relevant detection mechanism is needed to verify the presser foot position in real time to ensure embroidery quality and safe equipment operation. Summary of the Invention

[0003] Embodiments of this disclosure provide an embroidery machine with a presser foot alarm component and an alarm method thereof, aimed at solving one or more of the above-mentioned problems and other potential problems.

[0004] According to a first aspect of this disclosure, an embroidery machine with a presser foot alarm assembly is provided, comprising a needle bar holder for mounting needle bars and presser feet that cooperate with the needle bars; and a presser foot alarm assembly located on both sides of the needle bars, respectively, and the presser foot alarm assembly comprising a first conductive shaft extending along the needle bar arrangement direction of the embroidery machine; and a second conductive shaft extending along the needle bar arrangement direction of the embroidery machine, the second conductive shaft being located on the side of the first conductive shaft away from the needle bars, a conductive connector rotatably mounted on the second conductive shaft, the conductive connector corresponding one-to-one with the presser feet and having a mating portion for cooperating with the corresponding presser foot and an electrical contact portion for electrical contact with the first conductive shaft, the mating portion being used to be lifted when the presser foot corresponding to the conductive connector is in a high position, thereby driving the conductive connector to rotate from a normal position where the electrical contact portion is in electrical contact with the first conductive shaft to a working position where the electrical contact portion is separated from the second conductive shaft, and returning to the normal position when the presser foot is in a low position.

[0005] In some embodiments, the presser foot includes a presser foot connecting pin for connection with a corresponding needle bar, and the presser foot connecting pin is capable of moving upward as the presser foot is lifted, thereby lifting the conductive connector through the mating portion of the conductive connector corresponding to the presser foot, so that the electrical contact portion is separated from the first conductive shaft.

[0006] In some embodiments, the presser foot alarm assembly further includes a housing, inside which are provided the first conductive shaft, the second conductive shaft, and the conductive connector, wherein the housing has an opening on the side facing the needle bar for the mating portion of the conductive connector to extend out, and the opening extends along the direction of the presser foot's up-and-down movement.

[0007] In some embodiments, the conductive connector includes parallel double torsion springs sleeved on the second conductive shaft, with straight arms at both ends of the parallel double torsion springs extending along their length to form corresponding openings to form the mating portion; and the housing is also used for a first limiting portion that abuts against a buckle in the middle of the parallel double torsion springs and a second limiting portion that limits the conductive connector in the length direction of the second conductive shaft.

[0008] In some embodiments, the housing further includes a base having a plurality of first limiting portions, each of which corresponds to one of the conductive connectors; and a top cover having a plurality of second limiting portions, each of which corresponds to one of the conductive connectors, and the top cover having the opening on the side facing the needle bar.

[0009] In some embodiments, the straight arms at both ends of the parallel double torsion spring are respectively located on both sides of the needle bar connected to the pressure foot corresponding to the conductive connector.

[0010] In some embodiments, the side end face of the housing is provided with a first conductive terminal for electrical connection with the first conductive shaft and a second conductive terminal for electrical connection with the second conductive shaft.

[0011] In some embodiments, the component further includes an alarm component mounting bracket, the alarm component mounting bracket including a first connecting portion for connection to a base of the housing and a second connecting portion for connection to the needle bar holder.

[0012] According to a second aspect of this disclosure, an alarm method for an embroidery machine is provided, based on the presser foot alarm component described in the first aspect. The method includes detecting whether a first conductive shaft and a second conductive shaft are electrically connected during the machine's power-on detection process. The method further includes determining that the presser foot positions of all presser feet of the embroidery machine are normal in response to detecting an electrical disconnection of the first and second conductive shafts. Furthermore, the method includes determining that the presser foot position of at least one presser foot of the embroidery machine is abnormal in response to detecting an electrical connection between the first and second conductive shafts.

[0013] According to a third aspect of this disclosure, an alarm method for an embroidery machine is provided, based on the presser foot alarm component described in the first aspect above. The method includes detecting whether a first conductive shaft and a second conductive shaft are electrically connected during a shutdown detection process of the embroidery machine. The method further includes determining that the presser foot positions of all presser feet of the embroidery machine are normal in response to detecting that the first conductive shaft and the second conductive shaft are electrically disconnected. Furthermore, the method further includes determining that the presser foot position of at least one presser foot of the embroidery machine is abnormal in response to detecting that the first conductive shaft and the second conductive shaft are electrically connected. Attached Figure Description

[0014] The above and other objects, features, and advantages of embodiments of the present disclosure will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated in the drawings by way of example and not limitation.

[0015] Figure 1 A schematic diagram of the structure of the pressure foot alarm component and the pressure foot in accordance with an embodiment of the present disclosure is shown.

[0016] Figure 2 Show Figure 1 A magnified view of the area marked A.

[0017] Figure 3 The structure of an exemplary foot-pressing alarm component according to an embodiment of the present disclosure is shown.

[0018] Figure 4 The structure of an exemplary conductive connector according to an embodiment of the present disclosure is shown.

[0019] Figure 5 A schematic diagram of the assembly of an exemplary foot-pressing alarm component according to an embodiment of the present disclosure is shown.

[0020] Figure 6 A schematic diagram showing the engagement of the retaining ring of the parallel double torsion springs with the first limiting portion according to an embodiment of the present disclosure.

[0021] Figure 7 A schematic diagram showing the engagement of the retaining ring of the parallel double torsion springs with the second limiting portion according to an embodiment of the present disclosure.

[0022] Figure 8 A schematic diagram of the structure of an assembled foot alarm assembly according to an embodiment of the present disclosure is shown.

[0023] Figure 9 A schematic diagram showing the connection between the presser foot alarm assembly and the needle bar holder according to an embodiment of the present disclosure is provided.

[0024] In the various figures, the same or corresponding reference numerals indicate the same or corresponding parts. Detailed Implementation

[0025] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0026] The term "comprising" and its variations as used herein signify an open-ended inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". Terms such as "upper", "lower", "front", and "rear", indicating placement or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the purpose of describing the principles of this disclosure, and are not intended to indicate or imply that the elements referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting this disclosure.

[0027] As mentioned earlier, in embroidery machines with independently controlled presser feet, the lack of a presser foot holding mechanism makes them susceptible to problems. Drive malfunctions, signal deviations, or external resistance interference can easily cause the presser foot to fail to reach its designated position or to rise abnormally, leading to embroidery defects or even damage to the machine head. Therefore, a relevant detection mechanism is needed to verify the presser foot position in real time to ensure embroidery quality and safe equipment operation.

[0028] To address this issue, according to embodiments of this disclosure, an embroidery machine with a presser foot alarm component is provided. This embroidery machine can detect the presser foot's position in real time and issue an alarm during machine startup and needle replacement processes, preventing mechanical malfunctions caused by the presser foot being in a low position. The working principle of the presser foot alarm component according to embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0029] Figure 1 A schematic diagram showing the structure of the pressure foot alarm assembly and its engagement with the pressure foot according to an embodiment of the present disclosure is provided. Figure 1As shown, multiple needle bars 30 are arranged in a row at equal intervals and mounted on a needle bar holder (not shown in the figure). Each needle bar is connected to a presser foot 20 at its rear via a presser foot connecting pin. Each presser foot is independently controlled by its own drive mechanism to move up and down along the length of the needle bar. In one or more embodiments of this disclosure, a presser foot alarm component 10 is provided in front of this row of needle bars. The presser foot alarm component can detect in real time whether there is a presser foot with abnormal position during key processes such as starting and stopping the embroidery machine. In one or more embodiments of this disclosure, the presser foot alarm component 10 may include a first conductive shaft 101 and a second conductive shaft 102 extending along the arrangement direction of the needle bars 30 of the embroidery machine. The second conductive shaft is farther away from the needle bar than the first conductive shaft. Multiple conductive connectors 103 are installed at intervals along the length direction of the second conductive shaft. Each conductive connector corresponds to a presser foot 20 of the embroidery machine and is used to detect the position of the presser foot. In one or more embodiments of this disclosure, the conductive connector 103 has a mating portion for engaging with a corresponding pressure foot and an electrical contact portion for electrical contact with a first conductive shaft. The conductive connector is rotatably mounted on a second conductive shaft, and by rotation, it can switch between a normal position and a working position. When the conductive connector is in the normal position, it can make electrical contact with the first conductive shaft through the electrical contact portion, thereby electrically connecting the first and second conductive shafts. When the conductive connector is in the working position, the electrical contact portion of the conductive connector is electrically separated from the first conductive shaft, maintaining only electrical contact with the second conductive shaft, so that the first and second conductive shafts are not electrically connected through the conductive connector. In one or more embodiments of this disclosure, the conductive connector can be lifted when the corresponding pressure foot is in a high position, and under the action of this lifting force, rotate from the normal position to the working position. When the corresponding pressure foot is in a low position, the lifting force is removed, and the conductive connector can automatically return from the working position to the normal position, maintaining the normal electrical connection between the first and second conductive shafts.

[0030] In one or more embodiments of this disclosure, the first conductive shaft and the second conductive shaft can be solid or hollow rod structures made of materials such as copper, aluminum alloy, and carbon fiber. In one or more embodiments of this disclosure, the first conductive shaft and the second conductive shaft can be spaced apart, such that there is no electrical contact between their bodies. For example, the first and second conductive shafts can be parallel and maintained at a certain distance, or an insulating element can be provided at the distance between the two conductive shafts to maintain a state where the two conductive shafts have no electrical contact. In one or more embodiments of this disclosure, the first and second conductive shafts can be made of the same material and structure, or they can be made of different materials or structures. When the structures of the first and second conductive shafts are different, the length of the first conductive shaft should at least cover the area on the second conductive shaft where the conductive connector is provided. In one or more embodiments of this disclosure, the conductive connector can be a structure made of conductive materials such as copper, aluminum alloy, and carbon fiber, and the conductive connector can be obtained by welding, assembly, or other methods, or it can be a one-piece molded part obtained by an integral molding process.

[0031] Figure 2 It shows Figure 1 A magnified view of section A in the diagram, showing the engagement of the conductive connector with the corresponding pressure foot connecting pin 201. (See diagram for reference.) Figure 2 As shown, the presser foot connecting pin 201 can rise and fall synchronously with the presser foot moving between the low and high positions. In one or more embodiments of this disclosure, the mating part 132 of the conductive connector 103 is located above the presser foot connecting pin 201 of the presser foot corresponding to the conductive connector, that is, at the position near the top end of the vertical stroke of the presser foot moving synchronously with the presser foot. This allows the presser foot connecting pin to act on the conductive connector 103 through the mating part 132 as the corresponding presser foot moves upward, causing the conductive connector to rotate upward and switch from the normal position to the working position. In one or more embodiments of this disclosure, the portion of the conductive connector located between the mating portion 132 and the second conductive shaft, above the first conductive shaft, is the electrical contact portion 133. The height of the electrical contact portion can change with the rotation of the conductive connector. When the conductive connector is in its normal position, the electrical contact portion 133 can fall on the first conductive shaft, thereby making electrical contact with the first conductive shaft and electrically connecting the first and second conductive shafts. As the conductive connector rotates from its normal position to its working position, the position of the electrical contact portion 133 rises with the rotation of the conductive connector until it separates from the first conductive shaft.

[0032] Figure 3 The structure of an exemplary foot alarm component according to an embodiment of the present disclosure is shown, such as... Figure 3As shown, in one or more embodiments of this disclosure, the presser foot alarm assembly 10 may further include a housing 104. The first conductive shaft 101, the second conductive shaft 102, and the conductive connector 103 are all disposed within the housing 104 to form an assembly, facilitating overall installation and replacement, and protecting the conductive components within the housing from short circuits and other circuit accidents. Simultaneously, in one or more embodiments of this disclosure, a lateral opening 146 is provided on the side of the housing facing the needle bar, i.e., the side where the first conductive shaft 101 is located, to facilitate the extension of the mating portion 132 of the conductive connector 103 within the housing, enabling interaction with the presser foot connecting pin. The lateral opening may be a strip-shaped opening extending along the vertical movement direction of the presser foot, avoiding interference with the upward movement of the mating portion when it is lifted or the downward pressure during automatic return.

[0033] Figure 4 The structure of an exemplary conductive connector according to an embodiment of the present disclosure is shown, such as... Figure 4 As shown, in one or more embodiments of this disclosure, the conductive connector 103 can be a structure based on parallel double torsion springs. The parallel double torsion springs can include two spring segments with the same number of turns, formed by winding a single spring wire material in opposite directions on the same mandrel. The two sets of helical segments are designed with opposite left and right rotation directions, forming a symmetrical force-bearing structure. In one or more embodiments of this disclosure, the parallel double torsion spring includes a retaining ring 1311 located between the two sets of spring segments and straight arms 1312 located at the outer ends of the two sets of spring segments. The helical segment in the middle of the parallel double torsion spring can be sleeved on the second conductive shaft, simultaneously enabling the conductive connector to be installed and electrically connected to the second conductive shaft. Simultaneously, the housing 104 also provides a first limiting portion for abutting against the retaining ring 1311 in the middle of the parallel double torsion spring, ensuring that the two straight arms, as mating portions, have a prestress that continuously presses down on the first conductive shaft. In one or more embodiments of this disclosure, the housing 104 is further provided with a second limiting part for limiting the conductive connector in the length direction of the second conductive shaft, so that the conductive connector can rotate in place at the position aligned with the corresponding presser foot connecting pin.

[0034] Figure 5 A schematic diagram illustrating the assembly of an exemplary foot-presser alarm assembly according to an embodiment of the present disclosure is shown. Figure 5As shown, in one or more embodiments of this disclosure, the outer casing can be an assembly composed of a base and a top cover, which can be fixedly connected together by one or more screws 147. In one or more embodiments of this disclosure, both the base and the top cover are provided with groove-shaped structures for limiting the first conductive shaft and the second conductive shaft, respectively. When the base and the top cover are assembled together, the cross-sectional shape of the groove can match the cross-sectional shape of the corresponding conductive shaft, thereby fixing the first conductive shaft and the second conductive shaft in the outer casing. In one or more embodiments of this disclosure, a semi-circular long groove with a cross-section matching the shape of the lower half of the first conductive shaft can also be provided on the base for limiting the installation of the first conductive shaft. A plurality of shorter grooves are provided on the base along the length direction of the second conductive shaft for limiting the installation of the second conductive shaft. The grooves are used to mate with shaft segments 121 between two adjacent conductive connectors on the second conductive shaft, having an outer shape matching the shaft segment and a length less than or equal to the shaft segment. In one or more embodiments of this disclosure, square posts as insulating parts 144 are provided between the groove-shaped structures on the base for fixing the first conductive shaft and the second shaft fixing part, for separating the two. In one or more embodiments of this disclosure, a groove is formed between adjacent insulating portions as a first limiting portion 141. For a conductive connector based on a parallel double torsion spring, the groove has a width that matches the retaining ring of the parallel double torsion spring, such that the retaining ring portion can be accommodated therein and the retaining ring is limited to prevent it from moving along the length direction of the second conductive axis.

[0035] Figure 6 A schematic diagram is shown showing the engagement of the retaining ring 1311 of the parallel double torsion springs with the first limiting portion 141 according to an embodiment of the present disclosure. Figure 6 As shown, when the straight arms (i.e., mating parts 132) at both ends of the parallel double torsion spring are lifted by the pressure foot connecting pin, causing the conductive connector to rotate around the second conductive shaft 102, the sidewall of the groove can abut against the retaining ring for limiting the movement. In one or more embodiments of this disclosure, the two straight arms 1312 of the parallel double torsion spring can be respectively installed on both sides of the needle bar connected to the pressure foot corresponding to the conductive connector, and simultaneously located on the upper and lower travel path of the pressure foot connecting pin and slightly lower than the upper travel end point of the pressure foot connecting pin, so that as the pressure foot rises to the high position, the pressure foot connecting pin lifts the two straight arms 1312, causing the conductive connector to electrically separate from the first conductive shaft 101. When the pressure foot is in the low position, the pressure foot connecting pin 201 moves downward accordingly, and the two straight arms can return to the position of electrical contact with the first conductive shaft 101 under the action of downward prestress. In one or more embodiments of this disclosure, the ends of the two straight arms 1312 extend toward each other to limit the needle bar 30 between the two straight arms, ensuring the stability of the mating structure between the conductive connector and the pressure foot connecting pin.

[0036] Figure 7A schematic diagram is shown showing the engagement of the retaining ring of the parallel double torsion springs with the second limiting portion according to an embodiment of the present disclosure. In one or more embodiments of the present disclosure, the second limiting portion 145 may be a protruding structure provided on the inner surface of the upper cover, with each protruding structure corresponding one-to-one with the conductive connector 103. Each protruding structure can pass through the retaining ring 1311 of the corresponding conductive connector, thereby limiting the conductive connector and preventing it from moving along the length direction of the second conductive axis.

[0037] Figure 8 A schematic diagram of the assembled pressure foot alarm assembly according to an embodiment of the present disclosure is shown. Figure 8 As shown, in one or more embodiments of this disclosure, a first conductive terminal 151 and a second conductive terminal 152 for connecting a detection circuit are provided on one side end face of the housing 104. One end of the first conductive terminal 151 is electrically connected to a first conductive shaft inside the housing, and the other end protrudes from the surface of the housing 104 for easy connection to the detection circuit. Similarly, one end of the second conductive terminal 152 is electrically connected to a second conductive shaft inside the housing, and the other end protrudes from the surface of the housing 104 for easy connection to the detection circuit. In one or more embodiments of this disclosure, the presser foot alarm assembly can be connected to the needle bar frame of an embroidery machine via an alarm assembly mounting bracket 40, wherein the alarm assembly mounting bracket includes a first connecting portion 401 for connecting to the base of the housing and a second connecting portion 402 for connecting to the needle bar frame 50. In one or more embodiments of this disclosure, the alarm assembly mounting bracket can be an L-shaped bracket, with the horizontal portion of the bracket serving as the first connecting portion and fixedly connected to the housing, and the vertical portion of the bracket serving as the second connecting portion and connected to the needle bar frame. Figure 9 A schematic diagram showing the connection between the presser foot alarm assembly and the needle bar holder according to an embodiment is provided. Figure 9 As shown, the presser foot alarm assembly is embedded in the needle bar holder 50 below the needle bar guide plate via the alarm assembly mounting bracket 40, and is protected by an external plastic panel.

[0038] The presser foot alarm component based on the embodiments of this disclosure can determine whether the presser foot position of the embroidery machine is normal by detecting whether the first conductive shaft and the second conductive shaft are electrically connected. If the circuit between the first conductive shaft and the second conductive shaft is detected to be conductive, it indicates that at least one presser foot in the embroidery machine is in a low position and the presser foot position is abnormal. The detection circuit can alarm by means of light, sound, etc., to remind the staff to check the presser foot position.

[0039] An alarm method for an embroidery machine according to an embodiment of the present disclosure is implemented based on a presser foot alarm component 10. In one or more embodiments of the present disclosure, the alarm method can be executed and implemented by a detection circuit. The method may include detecting whether the first conductive shaft 101 and the second conductive shaft 102 are electrically connected during the power-on detection process of the embroidery machine. If the first conductive shaft and the second conductive shaft are detected to be electrically disconnected, the detection circuit determines that all presser feet of the embroidery machine are in a high position and does not trigger an alarm. If the first conductive shaft and the second conductive shaft are detected to be electrically connected, the detection circuit determines that at least one presser foot of the embroidery machine is in a low position, the position of the presser foot is abnormal, and an alarm is required to prompt the operator to check the presser foot position. In one or more embodiments of the present disclosure, the alarm method may further include detecting whether the first conductive shaft 101 and the second conductive shaft 102 are electrically connected during the power-off detection process of the embroidery machine. If the first conductive shaft and the second conductive shaft are detected to be electrically disconnected, the detection circuit determines that all presser feet of the embroidery machine are in a high position and does not trigger an alarm. If an electrical connection between the first and second conductive shafts is detected, the detection circuit determines that at least one presser foot of the embroidery machine is in a low position, indicating an abnormal presser foot position, and an alarm is required to alert the operator to check the presser foot position. In one or more embodiments of this disclosure, during normal operation of the embroidery machine, each presser foot can be raised and lowered independently as needed. In this case, the detection function of the detection circuit can be turned off, or the alarm signal and function of the inspection circuit can be disabled to avoid false alarms.

[0040] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An embroidery machine (100) with a presser foot alarm component, characterized in that, include: A needle bar holder for mounting a needle bar (30) and a presser foot (20) that mates with the needle bar. as well as A presser foot alarm assembly (10) is located on both sides of the needle bar, respectively, and the presser foot alarm assembly includes: The first conductive shaft (101) extends along the needle bar arrangement direction of the embroidery machine; as well as The second conductive shaft (102) extends along the needle bar arrangement direction of the embroidery machine. The second conductive shaft is located on the side of the first conductive shaft away from the needle bar. A conductive connector (103) is rotatably mounted on the second conductive shaft. The conductive connector corresponds one-to-one with the presser foot and has a mating part for engaging with the corresponding presser foot and an electrical contact part for electrical contact with the first conductive shaft. The mating part is used to be lifted when the presser foot corresponding to the conductive connector is in a high position, thereby driving the conductive connector to rotate from the normal position where the electrical contact part is in electrical contact with the first conductive shaft to the working position where the electrical contact part is separated from the second conductive shaft, and to return to the normal position when the presser foot is in a low position.

2. The embroidery machine according to claim 1, characterized in that, The presser foot includes a presser foot connecting pin (201) for connection with a corresponding needle bar, and the mating part (132) is located above the presser foot connecting pin. The presser foot connecting pin can move upward as the presser foot is lifted, thereby pushing the conductive connector from the normal position to the working position through the mating part of the conductive connector corresponding to the presser foot, so that the electrical contact part (133) is separated from the first conductive shaft.

3. The embroidery machine according to claim 2, characterized in that, The foot-pressing alarm component (10) also includes: The outer casing (104) has the first conductive shaft, the second conductive shaft and the conductive connector inside. The outer casing has an opening (146) on the side facing the needle bar for the mating part (132) of the conductive connector to extend out, and the opening extends along the direction of the presser foot moving up and down.

4. The embroidery machine according to claim 3, characterized in that, The conductive connector (103) includes parallel double torsion springs sleeved on the second conductive shaft. The straight arms (1312) at both ends of the parallel double torsion springs extend along their length to form corresponding openings, thus forming the mating portion. The housing (104) also includes a first limiting portion (141) for abutting against the buckle (1311) between the parallel double torsion springs, and a second limiting portion (145) for limiting the conductive connector in the longitudinal direction of the second conductive shaft.

5. The embroidery machine according to claim 4, characterized in that, The outer casing (104) also includes: The base is provided with multiple first limiting portions, and each first limiting portion corresponds to one of the conductive connectors; and The top cover is provided with a plurality of second limiting parts, each of which is connected to the conductive connector, and the top cover has the opening (146) on the side facing the needle bar.

6. The embroidery machine according to claim 5, characterized in that, The straight arms at both ends of the parallel double torsion springs are located on both sides of the needle bar connected to the pressure foot corresponding to the conductive connector.

7. The embroidery machine according to any one of claims 3-6, characterized in that, The side end face of the housing is equipped with a first conductive terminal (151) for electrical connection with the first conductive shaft and a second conductive terminal (152) for electrical connection with the second conductive shaft.

8. The embroidery machine according to any one of claims 4-6, characterized in that, It also includes an alarm component mounting bracket (40), which includes a first connecting portion (401) for connecting to the base of the housing and a second connecting portion (402) for connecting to the needle bar holder (50).

9. An alarm method for an embroidery machine, based on the presser foot alarm component according to any one of claims 1-8, characterized in that, include: During the startup detection process of the embroidery machine, it is detected whether the first conductive shaft and the second conductive shaft are electrically connected. In response to the detection of electrical disconnection between the first conductive shaft and the second conductive shaft, it is determined that the presser foot positions of all presser feet of the embroidery machine are normal; and In response to the detection of an electrical connection between the first conductive shaft and the second conductive shaft, it is determined that the presser foot position of at least one presser foot of the embroidery machine is abnormal.

10. An alarm method for an embroidery machine, based on the presser foot alarm component according to any one of claims 1-8, characterized in that, include: During the shutdown detection process of the embroidery machine, it is detected whether the first conductive shaft and the second conductive shaft are electrically connected; In response to the detection of electrical disconnection between the first conductive shaft and the second conductive shaft, it is determined that the presser foot positions of all presser feet of the embroidery machine are normal; and In response to the detection of an electrical connection between the first conductive shaft and the second conductive shaft, it is determined that the presser foot position of at least one presser foot of the embroidery machine is abnormal.

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