Thread take-up spring adjusting structure of thread trapper and embroidery machine head

Abstract

The invention discloses a thread clamping device take-up spring adjusting structure and an embroidery machine head, and relates to the embroidery machine technology, the thread clamping device take-up spring adjusting structure comprises a take-up spring nut assembly, the take-up spring nut assembly comprises a take-up spring, a take-up spring screw and a take-up spring nut, the take-up spring is provided with a take-up hook, and a panel is provided with a plurality of gears. The thread take-up spring nut assembly further comprises an adjusting component, the adjusting component is arranged on the thread take-up spring screw in a sleeving mode and can be operated to rotate and axially move relative to the thread take-up spring screw, the adjusting component can be selectively connected to one gear of the panel, and the thread take-up spring is driven by rotation of the adjusting component to change the thread take-up angle of the thread take-up hook. The elastic component is used for pressing the adjusting component in a bias mode in the direction of the panel, and the adjusting component is pressed by the elastic component in a bias mode to keep the engagement trend with the gears. Compared with the prior art, parts are few, the cost is lower, and adjustment and fixed gear locking are convenient.

Description

[Technical field]

[0001] The invention belongs to the technical field of embroidery equipment, and in particular relates to an embroidery machine. [Background technology]

[0002] With reference to the Chinese utility model patent application CN208995705U, a surface thread tension adjustment device of a sewing machine is disclosed, which belongs to the technical field of clothing manufacturing equipment. The sewing machine includes a casing and a thread clamp assembly. The surface thread tension adjustment device includes an adjusting wrench and a dial with scale values; the thread clamp assembly includes a thread clamp screw and a thread take-up spring adjustment seat, and the thread clamp screw is sequentially sleeved with a thread clamp nut, a thread clamp spring, a thread clamp plate 1 and a thread clamp plate 2; the adjusting wrench sleeve is arranged on the thread clamp screw and can drive the thread clamp screw to rotate, the adjusting wrench sleeve is located between the thread clamp spring and the thread clamp plate 1, and the thread clamp plate 1 is abutted against the thread clamp plate 2; the thread take-up spring adjustment seat is provided with a thread take-up spring, and the thread take-up spring has a thread take-up hook extending to the periphery of the thread clamp plate 1 and the thread clamp plate 2. In this technical solution, the thread loosening plate is replaced with an adjustment wrench on the existing thread clamp assembly; and a dial with a scale is added, and the adjustment wrench is opposite to the dial. When in use, the thread clamp screw is driven to rotate by rotating the adjustment wrench, and the thread clamp screw then drives the thread take-up spring adjustment seat to rotate, so that the restoring force of the thread take-up spring changes, and then the tension of the surface thread is changed. The data on the dial is used to display the torque of the thread take-up spring at this time, and the corresponding surface thread tension required for sewing is obtained. In order to fix the adjusted position, a threaded connection hole connected to the connecting through hole is opened on the side of the thread take-up spring adjustment seat, and a fastening screw is screwed in the threaded connection hole, and the inner end of the fastening screw can be against the peripheral surface of the thread clamp screw. This results in the need to loosen and tighten the fastening screw before and after each adjustment. For embroidery machines, multiple thread clamps are usually arranged on them, which undoubtedly causes inconvenience to the adjustment. [Summary of the invention]

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a thread take-up spring nut adjustment structure and a thread clamp to solve the problem that the thread take-up spring nut adjustment structure is inconvenient to adjust.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] Firstly, a thread clamp thread take-up spring adjustment structure is provided, comprising a thread take-up spring nut assembly mounted on a panel, the thread take-up spring nut assembly comprising a thread take-up spring, a thread take-up spring screw rod passing through the thread take-up spring, and a thread take-up spring nut connected to the front end of the thread take-up spring screw rod, the thread take-up spring is provided with a thread take-up hook, and is characterized in that:

[0006] The panel has multiple gear positions.

[0007] The thread take-up spring nut assembly also includes:

[0008] An adjusting component, the adjusting component is sleeved on the thread take-up spring screw and can be operated to rotate and move axially relative to the thread take-up spring screw, so that the adjusting component can be selectively engaged with one of the gear positions of the panel, and the thread take-up spring is driven by the rotation of the adjusting component to change the thread take-up stroke of the thread take-up hook;

[0009] An elastic component is used to bias the adjusting component toward the panel, and the adjusting component is biased by the elastic component to maintain a tendency to engage with the gear position.

[0010] Preferably, the panel is provided with shifting grooves spaced apart in the projected circumferential direction of the thread taking-up spring nut assembly, and the adjusting component is provided with a shifting portion, and when the shifting portion cooperates with the shifting groove, the adjusting component engages with one of the shifting positions of the panel; and / or, the thread taking-up hook is provided with a limiting portion, and the adjusting component is provided with a limiting surface, and the limiting surface cooperates with the limiting portion to locate the starting point of the thread taking-up stroke of the thread taking-up hook, and the adjusting component changes the circumferential position of the limiting surface after changing the shifting position to change the starting point of the thread taking-up stroke of the thread taking-up hook, thereby changing the thread taking-up stroke of the thread taking-up spring.

[0011] Preferably, the panel is provided with gear indicating grooves spaced apart circumferentially corresponding to the projection of the thread picking spring nut assembly, and the adjusting component is provided with a gear indicating portion, which cooperates with the gear indicating grooves to indicate the gear position after adjustment.

[0012] Preferably, the gear indicating groove extends to the radially outer side of the projection of the thread take-up spring nut assembly, and the gear indicating portion extends to the radially outer side of the projection of the thread take-up spring nut assembly.

[0013] Preferably, the limiting surface is arranged on the gear indicating portion.

[0014] Preferably, the thread clamp thread taking-up spring adjustment structure further includes a conductive component, a conductive sheet is provided on the adjustment component, the gear position indicating portion is conductively connected to the conductive sheet, and the conductive component is connected to the conductive sheet.

[0015] Preferably, the conductive sheet and the adjusting component are integrally injection molded; and / or the gear position indicating portion and the conductive sheet are an integral structure.

[0016] Preferably, the conductive component comprises an induction compression spring, and a front end of the induction compression spring abuts against the conductive sheet.

[0017] Preferably, the conductive component further includes an alarm connecting piece, the induction compression spring is provided with a connecting ring, and the alarm connecting piece is connected with a fastening screw fixing the connecting ring.

[0018] In addition, the present invention also provides an embroidery machine head, comprising the thread clamp thread take-up spring adjustment structure.

[0019] The present invention adopts the above technical solution and has the following technical effects:

[0020] The panel has a plurality of gears, and the adjusting component is mounted on the thread taking-up spring screw and can be operated to rotate and move axially relative to the thread taking-up spring screw, so that the adjusting component can be selectively engaged with one of the gears of the panel. The thread taking-up spring is driven by the rotation of the adjusting component to change the thread taking-up stroke of the thread taking-up hook. The elastic component is used to bias the adjusting component toward the panel, and the adjusting component is biased by the elastic component to maintain the engagement tendency with the gear. In this way, during operation, the adjusting component can move forward and backward along the axial direction of the thread taking-up spring screw. When the adjusting component moves forward, the elastic component is compressed, and the adjusting component is released, and the elastic component can drive the adjusting component to reset backward. In addition, the adjusting component can rotate around the thread taking-up spring screw. The adjusting component is connected to the thread taking-up spring. By rotating the adjusting component, the thread taking-up angle of the thread taking-up hook (the rotation angle of the thread taking-up hook during the thread taking-up process, i.e., the thread taking-up stroke) can be changed. After the thread taking-up angle changes, the surface thread tension required for embroidery is obtained accordingly.

[0021] In order to keep the adjusting component in position after rotation so as to maintain the set thread taking-up angle, the adjusting component is biased by the elastic component to maintain the engagement tendency with the gear. For example, the panel is provided with gear slots spaced circumferentially corresponding to the projection of the thread taking-up spring nut assembly, and the adjusting component is provided with a gear part. After the gear part cooperates with the gear slot, the adjusting component can maintain its position. Therefore, the adjusting component has an adjusting state and a fixed gear state. In the fixed gear state, the elastic component drives the adjusting component to cooperate with the gear slot. In the adjusting state, the gear part is disengaged from the gear slot by moving the adjusting component axially forward.

[0022] Therefore, compared with the prior art, in order to adjust the thread take-up spring, only one adjustment component needs to be set, and the gear position can be directly processed on the panel, wherein the elastic component is a conventional component in the existing thread take-up spring nut assembly, so there are fewer parts and the cost is lower.

[0023] In addition, when making adjustments, the shifting portion is disengaged from the shifting slot by moving the adjusting component axially forward, and the shifting portion is engaged with the shifting slot after the shift is changed by rotating the adjusting component. In the fixed gear state, the elastic component drives the adjusting component to engage with the shifting slot, and no additional locking is required. Therefore, both adjustment and fixed gear locking are relatively convenient.

[0024] Moreover, compared with the prior art, the present invention changes the thread taking-up stroke of the thread taking-up spring, and the front and rear adjustment changes are more obvious, so that the surface thread tension required for embroidery can be obtained.

[0025] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0026] The invention will be further described below in conjunction with the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the structure of the wire clamp;

[0028] Figure 2 yes Figure 1 The enlarged structural diagram at A in the middle;

[0029] Figure 3 yes Figure 1 The enlarged structural diagram at B in the middle;

[0030] Figure 4 This is a schematic diagram of the front structure of the wire clamp;

[0031] Figure 5 yes Figure 4 Middle DD section;

[0032] Figure 6 yes Figure 5 The enlarged structural diagram at C in the middle;

[0033] Figure 7 It is a structural diagram of the thread take-up spring;

[0034] Figure 8 It is a schematic diagram of the structure of the regulating component;

[0035] Fig. 9 It is a structural diagram of the thread take-up spring screw;

[0036] Fig.10 It is a structural diagram of the induction compression spring;

[0037] Fig.11 It is a schematic diagram of the structure of the stop ring;

[0038] Reference numerals: thread take-up spring nut assembly 100, thread take-up spring screw 11, large diameter section 111, clamping groove 1111, thread section 112, limiting groove 113, small diameter section 114, thread take-up spring 12, clamping foot 121, thread take-up hook 122, limiting portion 123, adjusting component 13, gear indicating portion 131, limiting surface 1311, gear portion 132, thread take-up spring nut 14, induction compression spring 15, connecting section 151, connecting ring 152, thread passing wheel 16, felt 161, thread clamping bowl 17, Wire clamping spring 18, stop ring 19, limit strip 191, wire passing component 200, wire passing seat 21, first side wall 211, second side wall 212, rear bottom wall 213, opening 214, groove 215, wire entry gap 216, wire blocking part 217, base plate 22, panel 300, mounting hole 31, gear indication groove 311, gear groove 312, through hole 32, alarm connecting piece 33, fastening screw 331, rear cover 400, wire clamping nut assembly 500, break detection wheel assembly 600. [Specific implementation method]

[0039] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0040] Those skilled in the art will appreciate that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0041] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the following words indicating orientation or positional relationship, such as "upper", "lower", "front", "rear", "lateral", etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0045] The head of the embroidery machine is equipped with a thread clamp, such as Figures 1 to 11As shown, the wire clamp structure in this embodiment includes a panel 300 and a back cover 400 connected to the back of the panel; a row of wire clamping nut assemblies 500, a row of break detection wheel assemblies 600, a row of wire take-up spring nut assemblies 100, and a wire passing component 200 are arranged on the panel 300 from top to bottom, a row of wire take-up spring nut assemblies 100, and a wire passing component 200, wherein the wire passing component 200 includes a row of wire passing seats 21, and each wire passing seat 21 is correspondingly located under a wire take-up spring nut assembly 100.

[0046] The wire needs to pass through the wire seat. In order to achieve the wire-free structure, many wire-free structures are designed in the wire-passing parts in the prior art. For example, in the Chinese invention patent CN115233386 A, the wire-passing parts include a wire seat and a wire-passing porcelain sleeve arranged in the middle of the wire seat. A mounting hole for clamping with the wire-passing porcelain sleeve is formed in the middle of the wire seat. A clamping block matching the size of the mounting hole is formed at the bottom of the wire-passing porcelain sleeve. A bending structure is formed at the top of the wire-passing porcelain sleeve. A wire-passing hole is formed between the bending structure and the clamping block. A mounting position matching with the wire seat is formed on the panel. The mounting position is a groove formed on the surface of the panel. The size of the groove is consistent with the cross-sectional size of the wire seat, so that the wire seat is clamped on the mounting position, and a spacing bar is formed between adjacent mounting positions, so that the wire seat is subjected to force alone during use, and the force of the wire seat does not affect the adjacent wire seat. The wire seat and the mounting position of the panel are interference-fitted, so that the wire seat transmits external force to the panel when subjected to force, ensuring the stability of the wire seat. The mounting hole is a rectangular structure, the clamping block is a corresponding rectangular structure, and the clamping block and the mounting hole are interference fit to achieve fixed connection of the wire-passing porcelain sleeve on the wire-passing seat. The bending structure is arranged close to the wire-passing seat, so that there is a gap between the bending structure and the wire-passing seat, and the gap facilitates the wire to be separated from the wire-passing seat. The wire-passing seat is provided with a wire-protecting spring arranged around the mounting hole, and a plug-in seat is formed on the wire-passing seat to be plugged into the end of the wire-protecting spring. The wire-protecting spring is a U-shaped structure, and a placement groove is formed along the inner circle of the mounting hole of the wire-passing seat. The upper and lower sides of the wire-protecting spring are simultaneously against the wire-passing seat, so as to achieve vertical positioning of the wire-protecting spring on the wire-passing seat, and two plug-in connectors are formed at the end of the wire-protecting spring, and a plug-in seat plugged into the two plug-in connectors is formed on the wire-passing seat, so as to achieve horizontal positioning of the wire-protecting spring and achieve stable connection of the wire-protecting spring on the wire-passing seat. The wire protection spring is arranged around the wire passing porcelain sleeve, and the middle of the wire protection spring forms an arc section corresponding to the bending structure, and a small gap is formed between the arc section and the bending structure, which is convenient for manually pulling the wire out of the wire passing piece. The wire passing hole is a vertical opening. During the wiring process, the wire passes through the wire passing hole. In the case where the wire protection spring is arranged around the wire passing hole, when the wire is offset to a certain extent during the movement, the wire contacts the wire protection spring, so that the wire has better stability during the wiring process.

[0047] Due to its complex structure, many components and high cost, this embodiment is to overcome this drawback. A wire-passing component 200 is provided, including a row of wire-passing seats 21 arranged in a transverse direction, the wire-passing seat 21 includes two transverse side walls and a rear bottom wall 213 connected to the rear ends of the two side walls, where the two transverse side walls are located on the opposite sides of the wire-passing seat 21 in the transverse direction, and are respectively a first side wall 211 and a second side wall 212, and in addition, the wire-passing seat 21 is provided with an opening 214 between the front ends of the first side wall and the second side wall, so that an open groove structure is formed on the wire-passing seat 21.

[0048] The first side wall 211 is provided with a wire stopper 217 extending toward the second side wall 212, and the second side wall 212 is provided with a groove 215, and the head end of the wire stopper 217 extends into the groove and a wire entry gap 216 is provided between the head end of the wire stopper 217 and the groove 215. In this way, there is no need to thread the wire up and down, and the wire can be threaded forward and backward, and because the head end of the wire stopper extends into the groove, the wire is not easy to fall out of the wire seat, which is convenient for threading and prevents the wire from falling off, and compared with the prior art, there is no need to set a wire protection spring, the structure is simplified, and the cost is reduced.

[0049] Specifically, the wire blocking portion 217 as a whole extends obliquely or in an arc shape from the front of the first side wall to the rear side wall of the groove, that is, the whole is inclined or in an arc structure, so as to form a wire entry guide port between the front side of the wire blocking portion and the second side wall of the wire passing seat to facilitate threading. At the same time, the rear side of the wire blocking portion is also an inclined surface or an arc surface, and forms a wire passing groove with the first side wall 211, the second side wall 212 and the rear bottom wall 213, and the wire passes through the wire passing groove. In addition, an upper and lower gap is provided between the head end of the wire blocking portion 217 and the upper and lower side walls of the groove, and a front and rear gap is provided between the head end of the wire blocking portion 217 and the rear side wall of the groove. The upper and lower gaps and the front and rear gaps cooperate to form the wire entry gap, and the front and rear gaps are larger than the upper and lower gaps, so as to facilitate threading and prevent the wire from falling off.

[0050] In addition, the head end of the wire retaining portion 217 is provided with an arc-shaped wire surface for guiding the wire into the wire entry gap. The groove 215 runs through the second side wall 212 transversely, and the head end of the wire retaining portion is located in the transverse middle position of the groove 215. The mouth edge of the groove 215 is provided with a circular arc chamfer.

[0051] Since a plurality of wire-passing seats 21 are arranged side by side, in order to facilitate the installation of the wire-passing seats, the wire-passing component further includes a substrate 22, the wire-passing seats 21 are arranged on the substrate 22, the substrates 22 of the plurality of wire-passing seats extend in the horizontal direction to form an integral arrangement, and the substrate is fixed on the panel. For example, a positioning groove is provided on the substrate, the wire-passing seat 21 is positioned in the positioning groove, and can be fixed by snapping or screwing.

[0052] In addition, in order to solve the problem of inconvenient adjustment of the thread take-up spring nut adjustment structure in the prior art. The thread take-up spring adjustment structure of the thread clamp set in this embodiment includes a thread take-up spring nut assembly 100 installed on the panel 300. Part of the structure of the thread take-up spring nut assembly 100 refers to the prior art. The thread take-up spring nut assembly 100 includes a thread take-up spring 12, a thread take-up spring screw 11 passing through the thread take-up spring, and a thread take-up spring nut 14 connected to the front end of the thread take-up spring screw. The thread take-up spring 12 is provided with a thread take-up hook 122, and the thread passes through the thread take-up hook. During the thread taking process, the thread pulls the thread take-up hook and moves from the starting point of the thread taking stroke to the end point of the thread taking stroke. The thread take-up spring nut assembly 100 is installed in the mounting hole 31.

[0053] In this embodiment, the panel 300 has multiple gear positions, and the thread take-up spring nut assembly 100 also includes the following components:

[0054] An adjusting component 13, wherein the adjusting component 13 is mounted on the thread take-up spring screw 11 and can be operated to rotate and move axially relative to the thread take-up spring screw 11, so that the adjusting component 13 can be selectively engaged with one of the gear positions of the panel, and the thread take-up spring 12 is driven by the rotation of the adjusting component 13 to change the thread take-up angle of the thread take-up hook 122;

[0055] An elastic component is used to bias the adjusting component 13 toward the panel, and the adjusting component 13 is biased by the elastic component to maintain a tendency to engage with the gear position.

[0056] In order to form a gear position on the panel, the panel 300 is provided with gear grooves 312 at intervals in the circumferential direction corresponding to the projection of the thread take-up spring nut assembly, and at the same time, the adjusting component 13 is provided with a gear portion 132 for cooperating with the gear groove 312. The adjusting component 13 has an adjusting state and a fixed gear state. In the fixed gear state, the elastic component drives the gear portion 132 to cooperate with the gear groove 312. In the adjusting state, the gear portion 132 is disengaged from the gear groove 312 by moving the adjusting component axially forward, and the gear portion 132 is matched with the gear groove 312 after the gear position is changed by rotating the adjusting component 13, thereby changing the thread taking stroke of the thread take-up hook.

[0057] In the above technical solution, the adjusting component can move forward and backward along the axial direction of the thread take-up spring screw. When the adjusting component moves forward, the elastic component is compressed. When the adjusting component is loosened, the elastic component can drive the adjusting component to reset backward. In addition, the adjusting component can rotate around the thread take-up spring screw. The adjusting component is connected to the thread take-up spring. By rotating the adjusting component, the thread picking angle of the thread take-up hook (the rotation angle of the thread take-up hook during the thread picking process, i.e., the thread picking stroke) can be changed. After the thread picking angle changes, the surface thread tension required for embroidery can be obtained accordingly.

[0058] In order to keep the adjusting component in position after rotation so as to maintain the set thread picking angle, the adjusting component is provided with a shift portion which cooperates with the shift groove on the panel so that the adjusting component can keep the position.

[0059] Compared with the prior art, in order to adjust the thread take-up spring, only one adjustment component needs to be set, and a shift groove can be directly processed on the panel, wherein the elastic component is a conventional component in the existing thread take-up spring nut assembly, so there are fewer parts and the cost is lower.

[0060] In addition, when making adjustments, the shifting portion is disengaged from the shifting slot by moving the adjusting component axially forward, and the shifting portion is engaged with the shifting slot after the shift is changed by rotating the adjusting component. In the fixed gear state, the elastic component drives the adjusting component to engage with the shifting slot, and no additional locking is required. Therefore, both adjustment and fixed gear locking are relatively convenient.

[0061] Moreover, compared with the prior art, since the thread taking-up stroke of the thread taking-up spring is changed, the change before and after adjustment is more obvious, and the surface thread tension required for embroidery can be obtained.

[0062] The adjusting component 13 may be a circular sheet structure, and a handle may be provided on the outer circle of the adjusting component to facilitate axial movement and rotation of the adjusting component.

[0063] It can be understood that the shifting slot only needs to be set at the projected circumferential local position of the panel corresponding to the thread take-up spring nut assembly, because this can meet the adjustment requirements of the thread take-up spring.

[0064] It is understandable that the adjustment component and the gear matching structure on the panel can also be replaced by other conventional structures.

[0065] In this embodiment, in order to change the thread picking angle of the thread picking hook, the adjusting component is rotated to change the relative position of the thread picking hook, so that the starting point of the thread picking stroke changes. Specifically, the thread picking hook 122 is provided with a limiting portion 123, and the adjusting component 13 is provided with a limiting surface 1311, and the limiting surface 1311 cooperates with the limiting portion 123 to locate the starting point of the thread picking stroke of the thread picking hook. After changing the gear position, the adjusting component 13 changes the circumferential position of the limiting surface, thereby changing the starting point of the thread picking stroke of the thread picking hook.

[0066] Furthermore, the panel 300 is provided with gear indicating grooves 311 spaced circumferentially corresponding to the projection of the thread taking-up spring nut assembly, and the adjusting component 13 is provided with a gear indicating portion 131, and the gear indicating portion 131 cooperates with the gear indicating groove 311 to indicate the gear position after adjustment. It is understandable that, for the convenience of observation, the gear indicating groove 311 extends to the radial outer side of the projection of the thread taking-up spring nut assembly, and the gear indicating portion 131 extends to the radial outer side of the projection of the thread taking-up spring nut assembly. Specifically, the gear indicating portion 131 is L-shaped, including a radial extension portion located at the rear side of the adjusting component and an axial extension portion connected to the radial outer end of the radial extension portion and extending forward, wherein the projection of the axial extension portion on the panel is located radially outside the projection of the thread taking-up spring nut assembly. The gear indicating portion 131 not only has the function of indicating the gear position, but also has the same gear setting function as the gear portion 132.

[0067] Furthermore, the limiting surface 1311 can be provided on the gear indicating portion 131. Thus, the gear indicating portion can be used for multiple purposes without the need to provide an additional limiting portion. Of course, an additional limiting portion can also be provided, and the limiting surface can be provided on the limiting portion.

[0068] In the prior art, in order to detect whether the thread taking-up spring nut assembly is working properly, a conductive component is usually provided. If it is working properly, the thread taking-up hook 122 will contact the conductive component during the reciprocating thread taking-up process. If a fault occurs, the thread taking-up hook 122 cannot reciprocate to take up the thread, and of course it will not contact the conductive component, so that the electrical signal is interrupted, thereby detecting the fault and alarming. Usually, a conductive component is provided with a conductive element, and the conductive element is fixed to a component connected to the thread taking-up spring by screws, which is not only troublesome to fix, but also not beautiful. In this embodiment, the thread clamp thread taking-up spring adjustment structure also includes a conductive component, wherein a conductive sheet is provided on the adjustment component 13, the gear indicating part 131 is conductively connected to the conductive sheet, and the conductive component is connected to the conductive sheet. Since the limit surface is provided on the gear indicating part, each time the thread is picked up, the thread taking-up hook will be in conductive contact with the gear indicating part, and at the same time, the gear indicating part is conductively connected to the conductive sheet, and the conductive component is connected to the conductive sheet.

[0069] Specifically, the conductive sheet and the adjusting component 13 are integrally injection molded, and the gear indicating part 131 is an integral structure with the conductive sheet, so that the number of parts can be reduced and the cost can be reduced. The conductive component includes an induction compression spring 15, and the front end of the induction compression spring 15 abuts against the conductive sheet to always maintain a conductive connection. In addition, the conductive component also includes an alarm connecting piece 33, and the induction compression spring 15 is connected to the alarm connecting piece 33. Among them, the induction compression spring 15 is provided with a connecting ring 152 and a connecting section 151 connecting the connecting ring and the compression spring body, and the alarm connecting piece 33 is connected with a fastening screw 331 that fixes the connecting ring 152 thereon. In addition, the panel 300 is provided with a through hole 32 on the radial outside of the mounting hole 31, and the connecting section 151 passes through the through hole 32, and the alarm connecting piece 33 is located on the rear side of the panel. The conductive alarm structure in this embodiment uses an induction compression spring to connect the conductive sheet and the alarm connection sheet. Since the front end of the induction compression spring abuts against the conductive sheet, the conductive connection can always be maintained, and there is no need to use a fastening screw to fix the induction compression spring. In addition, the conductive sheet and the adjustment component 13 are integrally injection molded, and there is no need to assemble an additional conductive sheet, thereby simplifying the structure. One alarm connection sheet 33 can be used to connect a row of wire-taking spring nut assemblies 100, simplifying the wiring.

[0070] Specifically, the thread take-up spring screw 11 is a stepped shaft, with a large diameter section 111 in the middle, a threaded section 112 in the front with a diameter smaller than the large diameter section, and a limit groove 113 extending axially and radially penetrating, and a small diameter section 114 in the rear with a diameter smaller than the large diameter section, and the small diameter section passes through the mounting hole 31 on the panel. The thread take-up spring 12 is sleeved on the large diameter section, and a groove 1111 is provided on the outer circle of the large diameter section. The thread take-up spring is provided with a clamping foot 121, and the clamping foot 121 cooperates with the clamping foot 1111, so that the thread take-up spring is fixed in position and cannot rotate relative to the thread take-up spring screw. By changing the starting position of the thread take-up hook, the thread take-up force can be changed.

[0071] In addition, referring to the prior art, the thread take-up spring nut assembly 100 also includes a thread passing wheel 16, a thread clamping bowl 17, and a thread clamping spring 18, which are movably sleeved on the thread take-up spring screw 11 and located between the front side of the adjusting component and the thread take-up spring nut 14, wherein the bowl mouth of the thread clamping bowl 17 faces the thread clamping spring 18, and the thread clamping spring 18 is a tower spring, and its large diameter end is positioned in the thread clamping bowl. A felt 161 is provided between the thread passing wheel 16 and the thread clamping bowl 17 and between the thread passing wheel 16 and the adjusting component 13. A groove is provided on the end surface of the thread clamping nut 14 facing the thread clamping spring, and the bottom surface of the groove has a tooth surface. A stop ring 19 matching the tooth surface is provided in the groove, and the stop ring 19 is sleeved on the thread take-up spring screw 11, and the middle part of the stop ring has a limit strip 191 inserted into the limit groove 113 of the thread clamping screw. Here, the clamping spring 18 serves as an elastic component, which can drive the adjusting component to move backward so that the shifting portion cooperates with the shifting groove.

[0072] The above is only a specific embodiment of the invention, but the protection scope of the invention is not limited thereto. Those skilled in the art should understand that the invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the invention will be included in the scope of the claims.

Claims

1. A thread take-up spring adjustment structure of a thread clamp, comprising a thread take-up spring nut assembly mounted on a panel, wherein the thread take-up spring nut assembly comprises a thread take-up spring, a thread take-up spring screw rod passing through the thread take-up spring, and a thread take-up spring nut connected to the front end of the thread take-up spring screw rod, wherein the thread take-up spring is provided with a thread take-up hook, and wherein: The panel has multiple gear positions. The thread take-up spring nut assembly also includes: An adjusting component, the adjusting component is sleeved on the thread take-up spring screw and can be operated to rotate and move axially relative to the thread take-up spring screw, so that the adjusting component can be selectively engaged with one of the gear positions of the panel, and the thread take-up spring is driven by the rotation of the adjusting component to change the thread take-up stroke of the thread take-up hook; An elastic component is used to bias the adjusting component toward the panel, and the adjusting component is biased by the elastic component to maintain a tendency to engage with the gear position.

2. The thread tensioner take-up spring adjustment structure according to claim 1, characterized in that: The panel is provided with shifting grooves spaced apart in the projected circumferential direction of the thread taking-up spring nut assembly, and the adjusting component is provided with a shifting portion, and when the shifting portion cooperates with the shifting groove, the adjusting component engages with one of the shifting positions of the panel; and / or, the thread taking-up hook is provided with a limiting portion, and the adjusting component is provided with a limiting surface, and the limiting surface cooperates with the limiting portion to locate the starting point of the thread taking-up stroke of the thread taking-up hook, and the adjusting component changes the circumferential position of the limiting surface after changing the shifting position to change the starting point of the thread taking-up stroke of the thread taking-up hook, thereby changing the thread taking-up stroke of the thread taking-up spring.

3. The thread tensioner take-up spring adjustment structure according to claim 2, characterized in that: The panel is provided with gear indicating grooves spaced apart in the circumferential direction corresponding to the projection of the thread take-up spring nut assembly, and the adjustment component is provided with a gear indicating portion, which cooperates with the gear indicating grooves to indicate the gear position after adjustment.

4. The thread tensioner take-up spring adjustment structure according to claim 3, characterized in that: The gear position indicating groove extends to the radial outer side of the projection of the thread take-up spring nut assembly, and the gear position indicating portion extends to the radial outer side of the projection of the thread take-up spring nut assembly.

5. The thread tensioner take-up spring adjustment structure according to claim 3, characterized in that: The limit surface is arranged on the gear indicating part.

6. The thread tensioner take-up spring adjustment structure according to claim 3, characterized in that: The thread clamp thread take-up spring adjustment structure also includes a conductive component, a conductive sheet is provided on the adjustment component, the gear position indicating portion is conductively connected to the conductive sheet, and the conductive component is connected to the conductive sheet.

7. The thread tensioner take-up spring adjustment structure according to claim 6, characterized in that: The conductive sheet and the adjusting component are integrally injection-molded; and / or the gear position indicating portion and the conductive sheet are an integral structure.

8. The thread tensioner take-up spring adjustment structure according to claim 6, characterized in that: The conductive component comprises an induction compression spring, and a front end of the induction compression spring abuts against the conductive sheet.

9. The thread tensioner take-up spring adjustment structure according to claim 8, characterized in that: The conductive component further includes an alarm connecting piece, the induction compression spring is provided with a connecting ring, and the alarm connecting piece is connected with a fastening screw fixing the connecting ring.

10. Embroidery machine head, characterized in that: The invention comprises the thread tensioner thread take-up spring adjustment structure according to any one of claims 1 to 9.

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