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

Abstract

The utility model 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, a panel is provided with a plurality of gears, and the gears are arranged on the panel. 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, the utility model has the advantages of fewer parts, lower cost and more convenience in adjustment and fixed gear locking.

Description

TECHNICAL FIELD

[0001] The utility model belongs to embroidery equipment technical field, concretely relates to embroidery machine. BACKGROUND

[0002] Referring to the Chinese utility model patent application with the publication number CN208995705U, a thread tension adjusting device of sewing machine is disclosed, which belongs to the technical field of garment manufacturing equipment, and the sewing machine comprises a casing and a thread clamp assembly. The thread tension adjusting device comprises an adjusting wrench and a dial plate with scale values. The thread clamp assembly comprises a thread clamp screw rod and a thread tension spring adjusting seat. A thread clamp nut, a thread clamp spring, a thread clamp plate one and a thread clamp plate two are sequentially arranged on the thread clamp screw rod. The adjusting wrench is arranged on the thread clamp screw rod and can drive the thread clamp screw rod to rotate. The adjusting wrench is arranged between the thread clamp spring and the thread clamp plate one. The thread clamp plate one is in abutment with the thread clamp plate two. A thread tension spring is arranged on the thread tension spring adjusting seat. The thread tension spring has a thread tension hook extending to the periphery of the thread clamp plate one and the thread clamp plate two. In the technical scheme, the thread tension plate in the existing thread clamp assembly is replaced by the adjusting wrench. A dial plate with scale values is additionally arranged. The adjusting wrench is opposite to the dial plate. When in use, the thread clamp screw rod is driven to rotate by rotating the adjusting wrench, and the thread tension spring adjusting seat is driven to rotate by the thread clamp screw rod, so that the restoring force of the thread tension spring is changed, and the tension of the thread is changed. The data on the dial plate shows the torque of the thread tension spring at this time, and the corresponding suitable thread tension required for sewing is obtained. In order to fix the position after adjustment, a threaded connection hole is formed in the side surface of the thread tension spring adjusting seat and connected to the connecting through hole. A fastening screw is screwed into the threaded connection hole, and the inner end of the fastening screw can abut against the peripheral surface of the thread clamp screw rod. This causes the fastening screw to be loosened and tightened every time before and after adjustment, which undoubtedly brings inconvenience to adjustment for the embroidery machine, which usually has a plurality of thread clamps. CONTENT OF THE UTILITY MODEL

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a thread tension spring nut adjusting structure and a thread clamp, which solve the problem of inconvenient adjustment of the thread tension spring nut adjusting structure.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] Firstly, a thread clamp thread tension spring adjusting structure is provided, which comprises a thread tension spring nut assembly installed on a panel. The thread tension spring nut assembly comprises a thread tension spring, a thread tension spring screw rod penetrating through the thread tension spring, and a thread tension spring nut connected with the front end of the thread tension spring screw rod. The thread tension spring is provided with a thread tension hook. The panel has a plurality of gear positions.

[0006] The panel has a plurality of gear positions.

[0007] The thread tension spring nut assembly further comprises:

[0008] an adjusting member sleeved on the thread tension spring screw and being operatively rotatable and axially movable relative to the thread tension spring screw so that the adjusting member is selectively engaged with one of the gear positions of the face plate, the thread tension spring being driven by rotation of the adjusting member to change the thread tensioning stroke of the thread tensioning hook;

[0009] a resilient member for biasing the adjusting member towards the face plate, the adjusting member being biased by the resilient member to maintain a tendency to engage with the gear positions.

[0010] Preferably, the face plate is provided with gear position grooves spaced apart in the projected circumferential direction of the thread tension spring nut assembly, the adjusting member is provided with a gear position portion, when the gear position portion is engaged with the gear position grooves, the adjusting member is engaged with one of the gear positions of the face plate; and / or, the thread tensioning hook is provided with a limiting portion, the adjusting member is provided with a limiting surface, the limiting surface is engaged with the limiting portion to position the starting point of the thread tensioning stroke of the thread tensioning hook, the adjusting member changes the circumferential position of the limiting surface after changing the gear position to change the starting point of the thread tensioning stroke of the thread tensioning hook, thereby changing the thread tensioning stroke of the thread tension spring.

[0011] Preferably, the face plate is provided with gear position indication grooves spaced apart in the projected circumferential direction of the thread tension spring nut assembly, the adjusting member is provided with a gear position indication portion, the gear position indication portion is engaged with the gear position indication grooves to indicate the gear position after adjustment.

[0012] Preferably, the gear position indication grooves extend to the radial outside of the projection of the thread tension spring nut assembly, the gear position indication portion extends to the radial outside of the projection of the thread tension spring nut assembly.

[0013] Preferably, the limiting surface is provided on the gear position indication portion.

[0014] Preferably, the thread tensioner thread tension spring adjusting structure further comprises a conductive member, the adjusting member is provided with a conductive sheet, the gear position indication portion is conductively connected with the conductive sheet, and the conductive member is connected with the conductive sheet.

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

[0016] Preferably, the conductive member comprises an inductive pressure spring, a front end of the inductive pressure spring abuts against the conductive sheet.

[0017] Preferably, the conductive member further comprises an alarm connecting sheet, the inductive pressure spring is provided with a connecting ring, and the alarm connecting sheet is connected with a fastening screw for fixing the connecting ring.

[0018] In addition, the utility model further provides a embroidery machine head, including the thread tensioner thread tension spring adjusting structure.

[0019] The utility model discloses the above technical scheme has the following technical effects:

[0020] The panel has multiple gears, the adjusting component is sleeved on the thread tension spring screw rod and can be operated to rotate and move axially relative to the thread tension spring screw rod, so that the adjusting component can be selectively engaged with one gear of the panel, the thread tension spring is driven by the rotation of the adjusting component to change the thread tension stroke of the thread tension hook, the elastic component is used for biasing the adjusting component to the panel, and the adjusting component is biased by the elastic component to keep the engagement trend with the gear. In this way, when operating, the adjusting component can move forward and backward along the axial direction of the thread tension spring screw rod, when the adjusting component moves forward, the elastic component is compressed, 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 tension spring screw rod, the adjusting component is connected with the thread tension spring, the thread tension angle (rotation angle of the thread tension hook during the thread tension process, i.e. the thread tension stroke) of the thread tension hook can be changed by rotating the adjusting component, and the thread tension angle is changed to obtain the required thread tension for embroidery.

[0021] In order to keep the position of the adjusting component after rotation and keep the set thread tension angle, the adjusting component is biased by the elastic component to keep the engagement trend with the gear. For example, the panel has gear grooves distributed at intervals in the projection circumferential direction of the thread tension spring nut assembly, and the adjusting component is provided with a gear part, after the gear part is matched with the gear groove, the adjusting component can keep the position. Therefore, the adjusting component has an adjusting state and a gear setting state, in the gear setting state, the elastic component drives the adjusting component to make the gear part matched with the gear groove, and in the adjusting state, the gear part is separated from the gear groove by moving the adjusting component forward in the axial direction.

[0022] Therefore, compared with the prior art, in order to realize the adjustment of the thread tension spring, only one adjusting component needs to be arranged, and the gears can be directly machined on the panel, wherein the elastic component is a conventional component in the existing thread tension spring nut assembly, so that the number of components is small, and the cost is lower.

[0023] In addition, when adjusting, the gear part is separated from the gear groove by moving the adjusting component forward in the axial direction, and the gear part is matched with the gear groove after the gear is changed by rotating the adjusting component, in the gear setting state, the elastic component drives the adjusting component to make the gear part matched with the gear groove, and no additional locking is needed, so that the adjustment and gear setting locking are both convenient.

[0024] Furthermore, compared with the prior art, the utility model is realized by changing the thread tension stroke of the thread tension spring, and the adjustment before and after is more obvious, and the required thread tension for embroidery can be obtained.

[0025] The characteristics and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] The utility model makes further illustration in combination with the drawings as follows:

[0027] Figure 1 It is the structural schematic diagram of the thread clamp;

[0028] Figure 2 It is Figure 1 The enlarged structural schematic diagram of A in the middle;

[0029] Figure 3 It is Figure 1 The enlarged structural schematic diagram of B in the middle;

[0030] Figure 4 It is the front structural schematic diagram of the thread clamp;

[0031] Figure 5 It is Figure 4 The D-D section view in the middle;

[0032] Figure 6 It is Figure 5 The enlarged structural schematic diagram of C in the middle;

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

[0034] Figure 8 It is the structural schematic diagram of the adjusting part;

[0035] Figure 9 It is the structural schematic diagram of the thread pick-up spring screw rod;

[0036] Figure 10 It is the structural schematic diagram of the inductive pressure spring;

[0037] Figure 11 It is the structural schematic diagram of the stop ring;

[0038] The drawing reference: thread pick-up spring nut assembly 100, thread pick-up spring screw rod 11, large diameter section 111, clamping groove 1111, threaded section 112, limiting groove 113, small diameter section 114, thread pick-up spring 12, clamping leg 121, thread pick-up hook 122, limiting part 123, adjusting part 13, gear position indicating part 131, limiting surface 1311, gear position part 132, thread pick-up spring nut 14, inductive pressure spring 15, connecting section 151, connecting ring 152, thread guide wheel 16, felt 161, thread clamp bowl 17, thread clamp spring 18, stop ring 19, limiting strip 191, thread guide part 200, thread guide seat 21, first side wall 211, second side wall 212, rear bottom wall 213, opening 214, recess 215, thread entry gap 216, thread blocking part 217, base plate 22, face plate 300, mounting hole 31, gear position indicating groove 311, gear position groove 312, through hole 32, alarm connecting piece 33, fastening screw 331, rear cover 400, thread clamp nut assembly 500, break detection wheel assembly 600. DETAILED DESCRIPTION

[0039] The technical solutions of the embodiments of the present application will be explained and described below in conjunction with the drawings of the embodiments of the present application. However, the following embodiments are only preferred embodiments of the present application, and are not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0040] Those skilled in the art can understand that the features in the following embodiments and embodiments can be combined with each other without conflict.

[0041] The terms used in the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. For example, the words indicating the orientation or position relationship such as "upper", "lower", "front", "back", "transverse" and the like in the following description are only based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application. The device / element indicated must have a specific orientation or be constructed and operated in a specific orientation.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise explicitly specified and limited, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can 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 11 As shown, the wire clamp structure in this embodiment includes a panel 300 and a back cover 400 connected to the back of the panel; the panel 300 is provided with a row of wire clamping nut assemblies 500, a row of breakage detection wheel assemblies 600, a row of wire take-up spring nut assemblies 100, and a wire guide component 200 from top to bottom. The wire guide component 200 includes a row of wire guide seats 21, and each wire guide seat 21 is located below a corresponding wire take-up spring nut assembly 100.

[0046] The wire needs to pass through the wire guide. In order to achieve the goal of eliminating the need for wire threading, the existing wire guide components have designed many wire-threading-free structures. For example, in Chinese utility model patent with publication number CN 115233386 A, the wire guide component includes a wire guide base and a wire guide ceramic sleeve disposed in the middle of the wire guide base. The middle of the wire guide base has a mounting hole that engages with the wire guide ceramic sleeve. The bottom of the wire guide ceramic sleeve has a snap-fit ​​block that matches the size of the mounting hole. The top of the wire guide ceramic sleeve has a bent structure, and a wire guide hole is formed between the bent structure and the snap-fit ​​block. The panel has mounting positions adapted to the cable guide. These mounting positions are grooves formed on the panel surface, with dimensions matching the cross-sectional dimensions of the cable guide. This allows the cable guide to snap into the mounting position. Spacers are formed between adjacent mounting positions, ensuring that the cable guide is subjected to force independently during use, without affecting adjacent cable guides. The interference fit between the cable guide and the mounting positions on the panel transfers external force to the panel, ensuring the stability of the cable guide. The mounting holes are rectangular, and the corresponding locking blocks are also rectangular, with an interference fit between the locking blocks and the mounting holes to secure the cable guide sleeve to the cable guide. The bent structure is positioned close to the cable guide, creating a gap between the bent structure and the cable guide, facilitating the removal of the cable from the cable guide. The cable guide is equipped with a cable guard spring surrounding the mounting hole, and the cable guide has a connector for inserting the end of the cable guard spring. The cable guard spring has a U-shaped structure, and the cable guide has a groove along the inner ring of the mounting hole. The upper and lower sides of the cable guard spring abut against the cable guide, thus achieving vertical positioning of the cable guard spring on the cable guide. The end of the cable guard spring has two connectors, and the cable guide has a connector for inserting the two connectors, thus achieving horizontal positioning of the cable guard spring and ensuring a stable connection of the cable guard spring on the cable guide. The cable guard spring surrounds the cable guide ceramic sleeve, and the middle of the cable guard spring has an arc-shaped segment corresponding to the bending structure. A small gap is formed between the arc-shaped segment and the bending structure to facilitate manual pulling of the cable through the cable guide. The cable pass-through hole is a vertical opening. During the cable routing process, the cable passes through the cable pass-through hole. With the cable guard spring surrounding the cable pass-through hole, when the cable deviates to a certain extent during movement, the cable comes into contact with the cable guard spring, thus making the cable more stable during the routing process.

[0047] In order to overcome the above-mentioned defects, the embodiment provides a wire passing component 200, which comprises a row of wire passing seats 21 arranged in the lateral direction, the wire passing seat 21 comprises lateral two side walls and a rear bottom wall 213 connected with the rear ends of the lateral two side walls, wherein the lateral two side walls are located on the opposite sides of the wire passing seat 21, 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 blocking part 217 extending towards the second side wall 212, the second side wall 212 is provided with a groove 215, the head end of the wire blocking part 217 extends into the groove and is provided with a wire entering gap 216 between the head end of the wire blocking part 217 and the groove 215. In this way, the wire can be passed through from front to back without the need of passing through from top to bottom, and since the head end of the wire blocking part extends into the groove, the wire is not easy to come out of the wire passing seat, so that the wire passing is facilitated and the wire is prevented from coming out, and compared with the prior art, the wire blocking spring is not needed, the structure is simplified, and the cost is reduced.

[0049] Specifically, the wire blocking part 217 extends from the front part of the first side wall to the rear side wall of the groove in a slanting or arc shape, that is, the wire blocking part is arranged in a slanting or arc shape as a whole, so that a wire entering guide opening is formed between the front side of the wire blocking part and the second side wall of the wire passing seat, so as to facilitate the wire passing, and the rear side of the wire blocking part is also provided with a slanting surface or an arc surface, which forms a wire passing groove together 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, the head end of the wire blocking part 217 is provided with an upper and lower gap between the upper and lower side walls of the groove and a front and rear gap between the rear side wall of the groove, the upper and lower gap and the front and rear gap cooperate to form the wire entering gap, and the front and rear gap is larger than the upper and lower gap, so as to facilitate the wire passing and prevent the wire from coming out.

[0050] In addition, the head end of the wire blocking part 217 is provided with an arc-shaped wire guide surface for guiding the wire into the wire entering gap. The groove 215 penetrates the second side wall 212 in the lateral direction, and the head end of the wire blocking part is located at the lateral middle position of the groove 215. The edge of the opening part 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 seat, the wire passing component further comprises a base plate 22, the wire passing seat 21 is arranged on the base plate 22, the base plates of the plurality of wire passing seats are integrally arranged in the lateral direction, and the base plate is fixed on the panel. For example, the base plate is provided with a positioning groove, and the wire passing seat 21 is positioned in the positioning groove and can be fixed by buckling or by screws.

[0052] In addition, in order to solve the problem of inconvenient adjustment of the thread tension spring nut adjusting structure in the prior art, the thread tension spring adjusting structure of the thread tensioner according to the embodiment is provided, which comprises a thread tension spring nut assembly 100 mounted on a panel 300. The thread tension spring nut assembly 100 comprises a thread tension spring 12, a thread tension spring screw rod 11 penetrating through the thread tension spring, and a thread tension spring nut 14 connected with the front end of the thread tension spring screw rod. The thread tension spring 12 is provided with a thread tension hook 122 through which the thread penetrates. During the thread tensioning process, the thread pulls the thread tension hook to move from the starting point of the thread tensioning stroke to the end point of the thread tensioning stroke. The thread tension spring nut assembly 100 is mounted in a mounting hole 31.

[0053] In the embodiment, the panel 300 has a plurality of gear positions, and the thread tension spring nut assembly 100 further comprises the following components:

[0054] An adjusting component 13 is sleeved on the thread tension spring screw rod 11 and can be rotatably and axially moved relative to the thread tension spring screw rod 11, so that the adjusting component 13 can be selectively engaged with one of the gear positions of the panel. The thread tension spring 12 is driven to rotate by the adjusting component 13 to change the thread tension angle of the thread tension hook 122.

[0055] An elastic component is used to bias the adjusting component 13 towards the panel. The adjusting component 13 is biased by the elastic component to maintain the engagement trend with the gear position.

[0056] In order to form the gear positions on the panel, the panel 300 is provided with gear position grooves 312 which are circumferentially spaced apart according to the projection of the thread tension spring nut assembly. Meanwhile, the adjusting component 13 is provided with a gear position part 132 which is used to cooperate with the gear position grooves 312. The adjusting component 13 has an adjusting state and a gear setting state. In the gear setting state, the elastic component drives the gear position part 132 to cooperate with the gear position grooves 312. In the adjusting state, the gear position part 132 is disengaged from the gear position grooves 312 by axially moving the adjusting component forward, and the gear position part 132 is cooperated with the gear position grooves 312 after the gear position is changed by rotating the adjusting component 13, so as to change the thread tension stroke of the thread tension hook.

[0057] In the above technical solution, the adjusting component can be moved forward and backward along the axial direction of the thread tension spring screw rod. When the adjusting component is moved forward, the elastic component is compressed, the adjusting component is released, and the elastic component can drive the adjusting component to reset. In addition, the adjusting component can be rotated around the thread tension spring screw rod. The adjusting component is connected with the thread tension spring. By rotating the adjusting component, the thread tension angle of the thread tension hook (the rotation angle of the thread tension hook during the thread tensioning process, i.e. the thread tension stroke) can be changed. After the change of the thread tension angle, the thread tension suitable for embroidery can be obtained.

[0058] In order to keep the position of the rotating adjustment component, so as to keep the set thread tension angle, the adjustment component is provided with a gear part which is matched with a gear slot on the panel, and the adjustment component can keep the position.

[0059] Compared with the prior art, in order to realize the adjustment of the thread tension spring, only one adjustment component is needed, and the gear slot can be directly machined on the panel, wherein the elastic component is a conventional component in the existing thread tension spring nut assembly, so that the parts are less and the cost is lower.

[0060] In addition, when adjusting, the gear part is separated from the gear slot by moving the adjustment component axially forward, and the gear part is matched with the gear slot after changing the gear by rotating the adjustment component. In the gear setting state, the elastic component drives the adjustment component to match the gear part with the gear slot, and no additional locking is needed, so that the adjustment and gear locking are more convenient.

[0061] Moreover, compared with the prior art, by changing the thread tension stroke of the thread tension spring, the adjustment before and after is more obvious, and the required thread tension for embroidery can be obtained.

[0062] The adjustment component 13 can be a circular sheet structure, and a handle part can be arranged on the outer circle of the adjustment component to facilitate the axial movement of the adjustment component and the rotation of the adjustment component.

[0063] It can be understood that the gear slot only needs to be arranged at the corresponding projection circumferential local position of the panel corresponding to the thread tension spring nut assembly, because this can meet the demand of the adjustment of the thread tension spring.

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

[0065] In the embodiment, in order to change the thread tension angle of the thread tension hook, the adjustment component is rotated to change the relative position of the thread tension hook, so that the starting point of the thread tension stroke is changed. Specifically, the thread tension hook 122 is provided with a limiting part 123, and the adjustment component 13 is provided with a limiting surface 1311 which cooperates with the limiting part 123 to position the starting point of the thread tension stroke of the thread tension hook. The adjustment component 13 changes the circumferential position of the limiting surface after changing the gear, so as to change the starting point of the thread tension stroke of the thread tension hook.

[0066] Further, the panel 300 is provided with a plurality of circumferentially spaced stop indication grooves 311 corresponding to the projection of the thread tension spring nut assembly, and the adjusting member 13 is provided with a stop indication part 131 which cooperates with the stop indication grooves 311 to indicate the stop position after adjustment. It can be understood that, in order to facilitate observation, the stop indication grooves 311 extend to the radial outer side of the projection of the thread tension spring nut assembly, and the stop indication part 131 extends to the radial outer side of the projection of the thread tension spring nut assembly. Specifically, the stop indication part 131 is L-shaped, including a radial extension part located at the rear side of the adjusting member and an axial extension part connected to the radial outer end of the radial extension part and extending forward, wherein the axial extension part is located at the radial outer side of the projection of the panel. The stop indication part 131 not only has the function of indicating the stop position, but also has the same function of the stop part 132.

[0067] Further, the stop surface 1311 can be arranged on the stop indication part 131. Thus, the stop indication part has multiple functions, and an additional stop part is not required. Of course, an additional stop part can also be arranged, and the stop surface is arranged on the stop part.

[0068] In the prior art, in order to detect whether the thread tension spring nut assembly is working normally, a conductive part is usually arranged. If the thread tension spring nut assembly is working normally, the thread hook 122 will contact the conductive part during the reciprocating thread lifting process. If a fault occurs, the thread hook 122 cannot reciprocate to lift the thread, and of course cannot contact the conductive part, so that the electric signal is interrupted, thereby detecting the fault and alarming. Usually, the conductive part is provided with a conductive element which is fixed on a part connected with the thread tension spring by a screw. This not only is inconvenient to fix, but also is not beautiful. In the present embodiment, the thread tension spring adjusting structure of the thread tensioner further comprises a conductive part, wherein the adjusting member 13 is provided with a conductive sheet, the stop indication part 131 is in conductive connection with the conductive sheet, and the conductive part is connected with the conductive sheet. Since the stop surface is arranged on the stop indication part, the thread hook will be in conductive contact with the stop indication part during each thread lifting process, and the stop indication part is in conductive connection with the conductive sheet, and the conductive part is connected with the conductive sheet.

[0069] Specifically, the conductive sheet is integrally injection molded with the adjusting component 13, and the gear position 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 part includes an inductive compression spring 15, the front end of the inductive compression spring 15 abuts against the conductive sheet, and the conductive connection can be maintained at all times. In addition, the conductive part further includes an alarm connecting sheet 33, and the inductive compression spring 15 is connected with the alarm connecting sheet 33. The inductive 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 sheet 33 is connected with a fastening screw 331 fixing the connecting ring 152 thereon. In addition, the faceplate 300 is provided with a through hole 32 on the radial outside of the mounting hole 31, the connecting section 151 passes through the through hole 32, and the alarm connecting sheet 33 is located on the rear side of the faceplate. The conductive alarm structure in the embodiment adopts an inductive compression spring to connect the conductive sheet and the alarm connecting sheet. Since the front end of the inductive compression spring abuts against the conductive sheet, the conductive connection can be maintained at all times, and the inductive compression spring does not need to be fixed by a fastening screw. In addition, the conductive sheet is integrally injection molded with the adjusting component 13, and the conductive sheet does not need to be additionally assembled, so that the structure is simplified. One alarm connecting sheet 33 can be used to connect a row of thread tension spring nut assemblies 100, and the wiring is simplified.

[0070] Specifically, the thread tension spring screw 11 is a stepped shaft, the middle part is provided with a large diameter section 111, the front part has a smaller diameter than the large diameter section and is provided with a threaded section 112, and a limiting groove 113 extending in the axial direction and penetrating in the radial direction. The rear part is a small diameter section 114 having a smaller diameter than the large diameter section, and the small diameter section passes through the mounting hole 31 of the faceplate. The thread tension spring 12 is sleeved on the large diameter section, the outer circle of the large diameter section is provided with a clamping groove 1111, the thread tension spring is provided with a clamping leg 121, and the clamping leg 121 cooperates with the clamping groove 1111. In this way, the position of the thread tension spring is fixed, the thread tension spring cannot rotate relative to the thread tension spring screw, and the starting position of the thread tension hook can be changed to change the thread tension.

[0071] In addition, with reference to the prior art, the thread tension spring nut assembly 100 further includes a thread passing wheel 16 movably sleeved on the thread tension spring screw 11 and located between the adjusting component and the thread tension spring nut 14 on the front side of the adjusting component, a thread clamping bowl 17, and a thread clamping spring 18. The bowl opening of the thread clamping bowl 17 faces the thread clamping spring 18, and the thread clamping spring 18 is a tower spring, and the large diameter end of the thread clamping spring is located in the thread clamping bowl. Felt 161 is arranged 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 recess is formed in the end surface of the thread clamping nut 14 facing the thread clamping spring, the bottom surface of the recess has a tooth surface, a stop ring 19 is arranged in the recess and cooperates with the tooth surface, the stop ring 19 is sleeved on the thread tension spring screw 11, and the middle part of the stop ring is provided with a limiting strip 191 inserted into the limiting groove 113 of the thread tension spring screw. Here, the thread clamping spring 18 serves as an elastic component and can drive the adjusting component to move backward so that the gear position part cooperates with the gear position groove.

[0072] The above description is merely that of a specific implementation of the present application, but the scope of protection of the present application is not limited thereto. It should be understood by those skilled in the art that the present application includes but is not limited to the contents described in the above specific implementation and the accompanying drawings. Any modification that does not deviate from the functional and structural principles of the present application will be included in the scope of protection of the claims.

Claims

1. A threader tension spring adjusting structure, comprising a threader tension spring nut assembly mounted on a face plate, the threader tension spring nut assembly comprising a threader tension spring, a threader tension spring screw rod penetrating through the threader tension spring, a threader tension spring nut connected with a front end of the threader tension spring screw rod, the threader tension spring being provided with a threader tension hook, characterized in that the face plate is provided with a plurality of stops, the threader tension spring nut assembly further comprising: an adjusting component, the adjusting component being sleeved on the threader tension spring screw rod and being operable to rotate and axially move relative to the threader tension spring screw rod, so that the adjusting component is selectively engaged with one of the stops of the face plate, and the threader tension spring is driven to change a threader tension stroke of the threader tension hook by rotation of the adjusting component; and an elastic component, the elastic component being used to bias the adjusting component towards the face plate, the adjusting component being biased by the elastic component to keep a tendency of engagement with the stop. The face plate is provided with stop grooves which are spaced apart in a projected circumferential direction of the threader tension spring nut assembly, the adjusting component is provided with a stop portion, when the stop portion is matched with the stop groove, the adjusting component is engaged with one of the stops of the face plate; and / or, the threader tension hook is provided with a limiting portion, the adjusting component is provided with a limiting surface, the limiting surface is matched with the limiting portion to position a starting point of the threader tension stroke of the threader tension hook, the limiting surface is changed in circumferential position by the adjusting component after the stop is changed, so as to change the starting point of the threader tension stroke of the threader tension hook, thereby changing the threader tension stroke of the threader tension spring. The face plate is provided with stop indication grooves which are spaced apart in a projected circumferential direction of the threader tension spring nut assembly, the adjusting component is provided with a stop indication portion, the stop indication portion is matched with the stop indication groove to indicate the stop after adjustment. The stop indication groove extends to a radial outside of the projection of the threader tension spring nut assembly, the stop indication portion extends to the radial outside of the projection of the threader tension spring nut assembly. The limiting surface is provided on the stop indication portion.

2. The thread-taker thread spring adjusting structure according to claim 1, wherein The threader tension spring adjusting structure further comprises a conductive component, the adjusting component is provided with a conductive sheet, the stop indication portion is conductively connected with the conductive sheet, and the conductive component is connected with the conductive sheet.

3. The thread-taker thread spring adjusting structure according to claim 2, wherein The conductive sheet is integrally injection molded with the adjusting component; and / or, the stop indication portion and the conductive sheet are an integral structure.

4. The thread-taker thread spring adjusting structure according to claim 3, wherein The conductive component comprises an inductive compression spring, a front end of the inductive compression spring abuts against the conductive sheet.

5. The thread-taker threader spring adjusting structure according to claim 3, wherein The conductive component further comprises an alarm connecting sheet, the inductive compression spring is provided with a connecting ring, and the alarm connecting sheet is connected with a fastening screw which fixes the connecting ring.

6. The thread-taker thread spring adjusting structure according to claim 3, wherein A threader comprising the threader tension spring adjusting structure according to any one of claims 1 to 9.

7. The thread-taker threader spring adjusting structure according to claim 6, wherein ​ 8. The thread-taker threader spring adjusting structure according to claim 6, wherein ​ 9. The threader threader spring adjusting structure according to claim 8, wherein, ​ 10. A head for an embroidery machine, characterised in that ​

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