Built-in electronic thread tensioner and sewing machine

Abstract

This utility model discloses a built-in electronic thread clamp and sewing machine in the field of sewing machine technology, including a mounting plate; a guide seat disposed on one side of the mounting plate; a guide shaft disposed on the other side of the mounting plate; a thread clamping assembly disposed on the guide shaft; a top sleeve axially movable between the thread clamping assembly and the mounting plate; a drive motor disposed on one side of the mounting plate; a transmission screw, one end of which is connected to the drive motor; an adjusting nut threadedly connected to the transmission screw, and slidingly connected to the guide seat in the axial direction; and an adjusting spring, one end of which abuts against the adjusting nut, and the other end of which abuts against the top sleeve. This utility model uses electric adjustment instead of mechanical adjustment, which not only improves the adjustment efficiency of the thread clamping force but also eliminates the requirement for experience level of the adjustment personnel.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a built-in electronic thread clamp and a sewing machine. Background Technology

[0002] Existing sewing machines use a thread clamp (with a built-in spring to provide elastic pressure) to clamp the thread, so that the other end of the thread is under tension when sewing on the fabric, thus producing a neat stitch. However, different fabrics have different tension requirements, so the clamping degree of the thread clamp needs to be manually adjusted.

[0003] Currently, most suture clamps on the market use the thread engagement length to control the compression of the clamping spring, thereby changing the degree of thread clamping. For example, patent document CN119877208A discloses a sewing machine that combines adjustable settings and free adjustment. Because they need to adapt to different fabrics, existing suture clamps have a wide range of adjustable thread engagement lengths. When changing to different fabrics, repeated adjustments are required to achieve aesthetically pleasing stitches. This is especially true when changing to fabrics with significantly different characteristics, often requiring a significant amount of time to experiment with adjusting the clamping degree. This is not only inefficient but also demands a high level of experience from the operator. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a built-in electronic thread clamp to address the above-mentioned technical problems, so as to improve the adjustment efficiency of the thread clamping force.

[0005] The technical solution adopted by this utility model is: a built-in electronic wire clamp, the built-in electronic wire clamp comprising:

[0006] Mounting plate;

[0007] A guide seat, which is disposed on one side of the mounting plate;

[0008] A guide shaft is disposed on the other side of the mounting plate;

[0009] A wire clamping assembly, wherein the wire clamping assembly is disposed on a guide shaft;

[0010] A top sleeve, which is axially movable and disposed between the wire clamping assembly and the mounting plate;

[0011] A drive motor is mounted on one side of the mounting plate;

[0012] A transmission screw, one end of which is connected to a drive motor for transmission;

[0013] The pressure adjusting nut is threaded onto the transmission screw, and the pressure adjusting nut is slidably connected to the guide seat in the axial direction;

[0014] The pressure adjusting spring has one end abutting against the pressure adjusting nut and the other end abutting against the top sleeve.

[0015] Preferably, the top sleeve includes a top pressure plate and an abutting slider. The top pressure plate is axially movable and sleeved on the guide shaft. A sliding connection groove is provided on the mounting plate. One end of the abutting slider is fixedly connected to the top pressure plate, and the other end of the abutting slider passes through the sliding connection groove and abuts against the other end of the pressure adjusting spring.

[0016] Preferably, the other end of the abutting slider is provided with an abutting step that matches the large-diameter end of the pressure adjusting spring.

[0017] Preferably, the abutting slider is an arc-shaped slider, and there are two abutting sliders, which are symmetrically arranged on both sides of the top pressure plate.

[0018] Preferably, the guide seat includes a connecting plate, a connecting cylinder, and a mounting ring. The connecting cylinder is fixedly connected between the connecting plate and the mounting ring, and the mounting ring is fixedly connected to the mounting plate. A guide groove is formed on the connecting cylinder along the axial direction. The pressure adjusting nut includes a nut part and a guide part that are fixedly connected. The nut part is threadedly connected to the transmission screw, and the guide part is slidably connected in the guide groove.

[0019] Preferably, the pressure adjusting nut is T-shaped.

[0020] Preferably, the guide seat includes a slide rail portion and a connecting plate portion, the connecting plate portion is fixedly connected to the mounting plate, and one end of the slide rail portion is fixedly connected to the connecting plate portion; one end of the pressure adjusting nut is provided with a threaded hole, the other end of the pressure adjusting nut is provided with a guide groove hole, the transmission screw is threadedly connected to the threaded hole, and the slide rail portion is slidably connected to the guide groove hole.

[0021] Preferably, there are two guide slots, and the two guide slots are symmetrically arranged on both sides of the threaded hole.

[0022] Preferably, the pressure adjusting nut includes a nut segment, a process segment, and a slotted segment that are circumferentially fixedly connected. A threaded hole is coaxially provided on the nut segment, and a guide slot is provided along the axial direction on the slotted segment. The thickness of the process segment is less than the distance between the two guide slots, and a weight-reducing hole is provided on the process segment, which communicates with the threaded hole.

[0023] Preferably, a mounting bracket is fixedly connected between the drive motor and the mounting plate, and the pressure adjusting nut, transmission screw, pressure adjusting spring and guide seat are located in the inner cavity of the mounting bracket.

[0024] Preferably, one end of the guide shaft is threaded to the mounting plate, and the other end of the guide shaft is provided with a stop ring.

[0025] Preferably, one end of the guide shaft passes through the mounting plate and is fixedly connected to the guide seat, and the other end of the guide shaft is provided with a retaining ring.

[0026] Preferably, the wire clamping assembly includes two wire clamping plates, which are fitted face-to-face on the guide shaft.

[0027] Preferably, the wire clamping assembly further includes a front pad and / or a rear pad, the front pad being disposed between the stop ring or retaining ring and the wire clamping piece, and the front pad being axially movable and sleeved on the guide shaft; the rear pad being disposed between the top sleeve and the wire clamping piece, and the rear pad being axially movable and sleeved on the guide shaft.

[0028] The second objective of this invention is to provide a sewing machine including the aforementioned built-in electronic thread clamp, wherein the number of the built-in electronic thread clamp is one or more, and the built-in electronic thread clamp is detachably and fixedly connected to the machine housing.

[0029] The beneficial effects of this utility model are:

[0030] This invention employs electric adjustment instead of mechanical adjustment. A guide seat and a drive motor are mounted on one side of the mounting plate, while a top sleeve and a thread clamping assembly are mounted on the guide shaft on the other side of the mounting plate. The pressure adjusting nut is slidably connected to the guide seat and is driven by a transmission screw to the drive motor. The forward and reverse rotation of the drive motor drives the pressure adjusting nut to reciprocate along the axial direction. A pressure adjusting spring is installed between the pressure adjusting nut and the top sleeve, which is installed between the mounting plate and the thread clamping assembly. The elastic deformation of the pressure adjusting spring drives the top sleeve to move axially and press against the thread clamping assembly, thereby adjusting the magnitude of the elastic force applied by the pressure adjusting spring to the thread clamping assembly. This achieves automatic adjustment of the thread clamping force, which not only improves the adjustment efficiency of the thread clamping force but also eliminates the need for experienced personnel in the adjustment process. Attached Figure Description

[0031] Figure 1 This is one of the structural schematic diagrams of the built-in electronic wire clamp of this utility model;

[0032] Figure 2 This is one of the three-dimensional schematic diagrams of the built-in electronic wire clamp of this utility model;

[0033] Figure 3 This is an exploded view of the built-in electronic wire clamp of this utility model;

[0034] Figure 4 This is one of the structural schematic diagrams of the mounting base;

[0035] Figure 5 This is one of the structural schematic diagrams of a pressure adjusting nut;

[0036] Figure 6 This is a schematic diagram of the guide shaft structure;

[0037] Figure 7 This is a structural diagram of the mounting plate;

[0038] Figure 8 This is a schematic diagram of the top sleeve structure;

[0039] Figure 9 This is the second schematic diagram of the built-in electronic wire clamp of this utility model;

[0040] Figure 10 This is the second perspective view of the built-in electronic wire clamp of this utility model;

[0041] Figure 11 This is the second structural schematic diagram of the mounting base;

[0042] Figure 12 This is the second schematic diagram of the pressure adjusting nut.

[0043] Figure 13 This is one of the structural diagrams of a sewing machine;

[0044] Figure 14 This is the second schematic diagram of a sewing machine.

[0045] Explanation of the reference numerals in the figure:

[0046] 10. Mounting plate; 11. Sliding connection groove; 12. Countersunk hole; 13. Connection hole;

[0047] 20. Guide seat; 21. Connecting plate; 22. Connecting cylinder; 23. Mounting ring; 24. Guide groove; 25. Slide rail section; 26. Connecting plate section; 27. Shaft hole;

[0048] 30. Guide shaft; 31. Stop ring;

[0049] 40. Wire clamping assembly; 41. Wire clamping piece; 42. Front pad; 43. Rear pad; 44. Washer;

[0050] 50. Top sleeve; 51. Top pressure plate; 52. Abutting slider; 53. Abutting step; 54. Through hole;

[0051] 60. Drive motor;

[0052] 70. Transmission screw;

[0053] 80. Adjusting nut; 81. Nut section; 82. Guide section; 83. Threaded hole; 84. Guide slot hole; 85. Nut section; 86. Process section; 87. Slotted section; 88. Weight reduction hole;

[0054] 90. Pressure adjusting spring;

[0055] 100. Mounting bracket;

[0056] 110. Stop ring. Detailed Implementation

[0057] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0058] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0061] Examples, such as Figures 1-14 As shown, a built-in electronic wire clamp includes: a mounting plate 10, a guide seat 20, a guide shaft 30, a wire clamping assembly 40, a top sleeve 50, a drive motor 60, a transmission screw 70, a pressure adjusting nut 80, and a pressure adjusting spring 90.

[0062] The guide seat 20 is disposed on one side of the mounting plate 10; the guide shaft 30 is disposed on the other side of the mounting plate 10; the wire clamping assembly 40 is disposed on the guide shaft 30; the top sleeve 50 is axially movable and disposed between the wire clamping assembly 40 and the mounting plate 10, for pressing the wire clamping assembly 40 in the axial direction; the drive motor 60 is disposed on one side of the mounting plate 10; one end of the transmission screw 70 is connected to the drive motor 60; the pressure adjusting nut 80 is threadedly connected to the transmission screw 70, and the pressure adjusting nut 80 is slidably connected to the guide seat 20 in the axial direction, so as to drive the pressure adjusting nut to reciprocate in the axial direction by the drive motor 60; one end of the pressure adjusting spring 90 abuts against the pressure adjusting nut 80, and the other end of the pressure adjusting spring 90 abuts against the top sleeve 50.

[0063] This invention employs electric adjustment instead of mechanical adjustment. A guide seat 20 and a drive motor 60 are installed on one side of the mounting plate 10, while a top sleeve 50 and a thread clamping assembly 40 are installed on the guide shaft 30 on the other side of the mounting plate 10. The pressure adjusting nut 80 is slidably connected to the guide seat 20 and is connected to the drive motor 60 via a transmission screw 70. The pressure adjusting nut 80 can be driven to reciprocate along the axial direction by the forward and reverse rotation of the drive motor 60. A pressure adjusting spring 90 is installed between the pressure adjusting nut 80 and the top sleeve 50, which is installed between the mounting plate 10 and the thread clamping assembly 40. The elastic deformation of the pressure adjusting spring 90 drives the top sleeve 50 to move axially and press against the thread clamping assembly 40, thereby adjusting the magnitude of the elastic force applied by the pressure adjusting spring 90 to the thread clamping assembly 40. This achieves automatic adjustment of the thread clamping force, which not only improves the adjustment efficiency of the thread clamping force but also eliminates the need for experience-based adjustments.

[0064] It should be noted that the axial direction in this utility model refers to the axial direction of the guide shaft 30, which is the axial direction of the electronic wire clamp.

[0065] Specific embodiment 1, such as Figures 1-14 As shown, a built-in electronic wire clamp includes: a mounting plate 10, a guide seat 20, a guide shaft 30, a wire clamping assembly 40, a top sleeve 50, a drive motor 60, a transmission screw 70, a pressure adjusting nut 80, and a pressure adjusting spring 90.

[0066] The mounting plate 10 has a sliding connection groove 11, which extends through the mounting plate 10 along the axial direction.

[0067] The guide seat 20 is fixedly installed on one side of the mounting plate 10, that is, the guide seat 20 is fixedly installed on the left side of the mounting plate 10.

[0068] The guide shaft 30 is fixedly installed on the other side of the mounting plate 10, that is, the guide shaft 30 is fixedly installed on the right side of the mounting plate 10, and the axis of the guide shaft 30 is parallel or collinear with the axis of the guide seat 20.

[0069] The thread clamping assembly 40 is mounted on the guide shaft 30 and is used to apply clamping force to the thread.

[0070] The top sleeve 50 is axially movable and installed between the wire clamping assembly 40 and the mounting plate 10 to press the wire clamping assembly 40 in the axial direction.

[0071] Preferred, such as Figure 8 As shown, the top sleeve 50 includes a top pressure plate 51 and an abutting slider 52. The top pressure plate 51 has a coaxial through hole 54. The top sleeve 50 is sleeved on the guide shaft 30 through the through hole 54, and the top pressure plate 51 can reciprocate along the axial direction, that is, the top sleeve 50 can reciprocate along the axial direction.

[0072] In the axial direction, one end of the abutting slider 52 is fixedly connected to the top pressure plate 51, and the other end of the abutting slider 52 passes through the sliding connecting groove 11 and abuts against the large diameter end of the pressure adjusting spring 90. The shape of the abutting slider 52 is adapted to the shape of the sliding connecting groove 11 on the mounting plate 10, and the abutting slider 52 can slide back and forth in the sliding connecting groove 11 along the axial direction so that the top sleeve 50 can axially press the thread clamping assembly 40 under the elastic force of the pressure adjusting spring 90, thereby realizing the adjustment of the thread clamping force.

[0073] More preferably, an abutting step 53 is provided at the other end of the abutting slider 52 to cooperate with the large diameter end of the pressure adjusting spring 90. The abutting step 53 is used to radially limit the large diameter end of the pressure adjusting spring 90.

[0074] Specifically, there are two abutting sliders 52. The two abutting sliders 52 are located on the left side of the top pressure plate 51, and the right end of the abutting slider 52 is perpendicularly and fixedly connected to the left end face of the top pressure plate 51. The two abutting sliders 52 are symmetrically arranged on both sides of the through hole 54, one above the other, and each abutting slider 52 is an arc-shaped slider, that is, the cross-section of the abutting slider 52 is arc-shaped.

[0075] The drive motor 60 is fixedly installed on one side of the mounting plate 10, and the drive motor 60 is located on the side of the guide seat 20 away from the mounting plate 10.

[0076] The transmission screw 70 is arranged parallel to the guide shaft 30. The transmission screw 70 is located between the drive motor 60 and the mounting plate 10, and one end of the transmission screw 70 is connected to the drive motor 60. That is, the left end of the transmission screw 70 is coaxially and fixedly connected to the power output shaft of the drive motor 60, or the transmission screw 70 and the power output shaft of the drive motor 60 are integrally formed.

[0077] The adjusting nut 80 is threaded onto the transmission screw 70, and the adjusting nut 80 is slidably connected to the guide seat 20 in the axial direction, so as to drive the adjusting nut to reciprocate in the axial direction by the drive motor 60.

[0078] The adjusting spring 90 is located between the adjusting nut 80 and the mounting plate 10, with one end of the adjusting spring 90 abutting against the adjusting nut 80 and the other end of the adjusting spring 90 abutting against the top sleeve 50.

[0079] Specific embodiment 2, such as Figures 1-8 As shown, a built-in electronic wire clamp includes: a mounting plate 10, a guide seat 20, a guide shaft 30, a wire clamping assembly 40, a top sleeve 50, a drive motor 60, a transmission screw 70, a pressure adjusting nut 80, and a pressure adjusting spring 90.

[0080] The mounting plate 10 has a connection hole 13.

[0081] The guide seat 20 is fixedly installed on one side of the mounting plate 10, that is, the guide seat 20 is fixedly installed on the left side of the mounting plate 10.

[0082] The guide shaft 30 is fixedly installed on the other side of the mounting plate 10, that is, the guide shaft 30 is fixedly installed on the right side of the mounting plate 10, and the axis of the guide shaft 30 is collinear with the axis of the guide seat 20.

[0083] Preferred, such as Figure 6 As shown, an external thread is provided at the left end of the guide shaft 30, and the left end of the guide shaft 30 is threaded into the connecting hole 13 on the mounting plate 10, so that one end of the guide shaft 30 is detachably and fixedly connected to the mounting plate 10; a stop ring 31 is integrally formed at the other end of the guide shaft 30, the radial dimension of the stop ring 31 is larger than the radial dimension of the guide shaft 30, and it is used to axially limit the wire clamping assembly 40.

[0084] More preferably, a slot is formed on the stop ring 31.

[0085] The thread clamping assembly 40 is mounted on the guide shaft 30 and is used to apply clamping force to the thread.

[0086] Specifically, such as Figure 1 and Figure 3 The wire clamping assembly 40 includes two wire clamping pieces 41, which are mounted face-to-face on the guide shaft 30 and are movable along the axial direction.

[0087] Preferably, the wire clamping assembly 40 further includes a front pad 42, which is disposed between the stop ring 31 and the wire clamping piece 41, and the front pad 42 is axially movable and sleeved on the guide shaft 30.

[0088] The wire clamping assembly 40 also includes a rear pad 43, which is disposed between the top sleeve 50 and the wire clamping piece 41, and is axially movable and sleeved on the guide shaft 30.

[0089] The top sleeve 50 is axially movable and installed between the wire clamping assembly 40 and the mounting plate 10 to press the wire clamping assembly 40 in the axial direction.

[0090] The drive motor 60 is fixedly installed on one side of the mounting plate 10, and the drive motor 60 is located on the side of the guide seat 20 away from the mounting plate 10.

[0091] The transmission screw 70 is arranged parallel to the guide shaft 30. The transmission screw 70 is located between the drive motor 60 and the mounting plate 10, and one end of the transmission screw 70 is connected to the drive motor 60. That is, the left end of the transmission screw 70 is coaxially and fixedly connected to the power output shaft of the drive motor 60.

[0092] The adjusting nut 80 is threaded onto the transmission screw 70, and the adjusting nut 80 is slidably connected to the guide seat 20 in the axial direction, so as to drive the adjusting nut to reciprocate in the axial direction by the drive motor 60.

[0093] Specifically, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the axial sliding connection between the pressure adjusting nut 80 and the guide seat 20 is achieved as follows: The guide seat 20 includes a connecting plate 21, a connecting cylinder 22, and a mounting ring 23. The connecting cylinder 22 is integrally formed and fixedly connected between the connecting plate 21 and the mounting ring 23. The mounting ring 23 is detachably fixedly connected to the mounting plate 10. For example, a threaded connection hole is provided on the mounting ring 23, and a countersunk hole 12 is provided on the mounting plate 10. The countersunk hole 12 and the threaded connection hole are in a one-to-one correspondence, and a connecting screw is installed in the countersunk hole 12. The end of the connecting screw is threadedly connected to the threaded connection hole, so that the mounting ring 23 and the connecting plate 21 are detachably fixedly connected.

[0094] A guide groove 24 is provided on the connecting cylinder 22. The guide groove 24 is arranged in the axial direction and the left end of the guide groove 24 passes through the connecting plate 21. The pressure adjusting nut 80 includes a nut part 81 and a guide part 82 that are fixedly connected. In the radial direction, the radial dimension of the guide part is greater than the radial dimension of the nut part 81. The nut part 81 is threadedly connected to the transmission screw 70, and the guide part 82 is slidably connected in the guide groove 24.

[0095] Preferably, there are two guide grooves 24, and the two guide grooves 24 are arranged one above the other at the top and bottom of the connecting cylinder 22. The pressure adjusting nut 80 is T-shaped, and the top and bottom ends of the guide part 82 are slidably connected to the two guide grooves 24.

[0096] The adjusting spring 90 is located between the adjusting nut 80 and the mounting plate 10, and the adjusting spring 90 is sleeved on the outside of the transmission screw 70. The small diameter end of the adjusting spring 90 abuts against the adjusting nut 80, that is, the small diameter end of the adjusting spring 90 abuts against the guide part 82 of the adjusting nut 80, and the large diameter end of the adjusting spring 90 abuts against the top sleeve 50.

[0097] Specific embodiment 3, such as Figures 7-12 As shown, a built-in electronic wire clamp includes: a mounting plate 10, a guide seat 20, a guide shaft 30, a wire clamping assembly 40, a top sleeve 50, a drive motor 60, a transmission screw 70, a pressure adjusting nut 80, and a pressure adjusting spring 90.

[0098] The mounting plate 10 has a connection hole 13.

[0099] The guide seat 20 is fixedly installed on one side of the mounting plate 10, that is, the guide seat 20 is fixedly installed on the left side of the mounting plate 10.

[0100] The guide shaft 30 is installed on the other side of the mounting plate 10, that is, the guide shaft 30 is fixedly installed on the right side of the mounting plate 10, and the axis of the guide shaft 30 is collinear with the axis of the guide seat 20.

[0101] Preferred, such as Figure 9 and Figure 11 As shown, the left end of the guide shaft 30 passes through the connecting hole 13 and is fixedly connected to the right end of the guide seat 20; a retaining ring 110 is installed on the right end of the guide shaft 30 for axially limiting the wire clamping assembly 40.

[0102] The thread clamping assembly 40 is mounted on the guide shaft 30 and is used to apply clamping force to the thread.

[0103] Specifically, such as Figure 9 As shown, the wire clamping assembly 40 includes two wire clamping pieces 41, which are mounted face-to-face on the guide shaft 30 and are movable along the axial direction.

[0104] Preferably, the wire clamping assembly 40 further includes a front pad 42, which is disposed between the stop ring 31 and the wire clamping piece 41, and the front pad 42 is axially movable and sleeved on the guide shaft 30.

[0105] The wire clamping assembly 40 also includes a rear pad 43, which is disposed between the top sleeve 50 and the wire clamping piece 41, and is axially movable and sleeved on the guide shaft 30.

[0106] The top sleeve 50 is axially movable and installed between the wire clamping assembly 40 and the mounting plate 10 to press the wire clamping assembly 40 in the axial direction.

[0107] The drive motor 60 is fixedly installed on one side of the mounting plate 10, and the drive motor 60 is located on the side of the guide seat 20 away from the mounting plate 10.

[0108] The transmission screw 70 is arranged parallel to the guide shaft 30. The transmission screw 70 is located between the drive motor 60 and the mounting plate 10, and one end of the transmission screw 70 is connected to the drive motor 60. That is, the left end of the transmission screw 70 is coaxially and fixedly connected to the power output shaft of the drive motor 60.

[0109] The adjusting nut 80 is threaded onto the transmission screw 70, and the adjusting nut 80 is slidably connected to the guide seat 20 in the axial direction, so as to drive the adjusting nut to reciprocate in the axial direction by the drive motor 60.

[0110] Specifically, such as Figure 11 and Figure 12 As shown, the axial sliding connection between the pressure adjusting nut 80 and the guide seat 20 is achieved as follows: the guide seat 20 includes a slide rail portion 25 and a connecting plate portion 26. The slide rail portion 25 is arranged along the axial direction, and the right end of the slide rail portion 25 is perpendicularly fixedly connected to the connecting plate portion 26. The connecting plate portion 26 is fixedly connected to the mounting plate 10 by connecting screws.

[0111] A threaded hole 83 is provided at the left end of the pressure adjusting nut 80, and a guide groove 84 is provided at the right end of the pressure adjusting nut 80. The right end of the transmission screw 70 is threadedly connected to the threaded hole 83, and the slide rail 25 is slidably connected to the guide groove 84.

[0112] Specifically, the pressure regulating nut 80 includes a nut section 85, a process section 86, and a slotted section 87. A threaded hole 83 is coaxially provided on the nut section 85, and guide slots 84 are provided along the axial direction on the slotted section 87. There are two guide slots 84, which are spaced one above the other and are located on the upper and lower sides of the threaded hole 83 respectively. The process section 86 is fixedly connected between the nut section 85 and the slotted section 87. The thickness of the process section 86 is smaller than the distance between the two guide slots 84 to prevent the slide rail part 25 from moving axially within the guide slots 84. A weight-reducing hole 88 is provided on the process section 86, which communicates with the threaded hole 83.

[0113] The guide seat 20 includes two slide rails 25 and a connecting plate 26. The two slide rails 25 are symmetrically arranged one above the other, and a shaft hole 27 of the guide seat 20 is formed between the two slide rails 25.

[0114] The adjusting spring 90 is located between the adjusting nut 80 and the mounting plate 10, and the adjusting spring 90 is sleeved on the outside of the guide seat 20. The small diameter end of the adjusting spring 90 abuts against the adjusting nut 80, that is, the small diameter end of the adjusting spring 90 abuts against the guide portion 82 of the adjusting nut 80, and the large diameter end of the adjusting spring 90 abuts against the top sleeve 50.

[0115] Preferably, the built-in electronic wire clamp also includes a mounting bracket 100, which is disposed between the drive motor 60 and the mounting plate 10. One end of the mounting bracket 100 is fixedly connected to the mounting plate 10, and the other end of the mounting bracket 100 is fixedly connected to the drive motor 60. The pressure adjusting nut 80, the transmission screw 70, the pressure adjusting spring 90, and the guide seat 20 are located in the inner cavity of the mounting bracket 100.

[0116] Examples, such as Figure 13 and Figure 14 As shown, a sewing machine includes the aforementioned built-in electronic thread clamp, the number of which is one or more, and the mounting plate 10 or mounting bracket 100 of the built-in electronic thread clamp is detachably and fixedly connected to the machine housing (not shown in the figure).

[0117] The working process of the built-in electronic wire clamp of this utility model is as follows:

[0118] This utility model uses a rotary drive source for driving. The drive motor 60 is fixedly installed at one end of the guide seat 20. The guide seat 20 is installed on one side of the mounting plate 10. The mounting plate 10 is fixed on the housing. The power output shaft of the drive motor 60 is connected to the transmission screw 70. The pressure adjusting nut 80 is threadedly connected to the transmission screw 70 and is slidably connected in the guide groove 24 of the guide seat 20. One end of the pressure adjusting spring 90 abuts against the pressure adjusting nut 80, and the other end of the pressure adjusting spring 90 presses against the end face groove of the top sleeve 50. The other end face of the top sleeve 50 presses against one side of the rear pad 43. The other side of the rear pad 43 presses against one side of the clamping piece 41. The clamping piece 41 presses against the front pad 42. The front pad 42 presses against the washer 44. The washer 44 presses against the retaining ring 110. At the same time, one end of the guide shaft 30 is fixedly connected to the mounting plate 10. When the drive motor 60 rotates, it can drive the pressure adjusting nut 80 to slide back and forth on the guide seat 20, thereby changing the compression of the pressure adjusting spring 90, and thus adjusting the clamping degree between the front and rear clamping plates.

[0119] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0120] This utility model has the advantages of simple and compact structure. It can not only realize electronic adjustment of the sewing clamping force, which greatly reduces the time of manual adjustment, but also the pressure adjusting spring is set on the inside, with less exposed part, and the overall design is relatively simple.

[0121] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An electronic built-in threader, characterized in that, The built-in electronic wire clamp includes: Mounting plate (10); Guide seat (20), the guide seat (20) is disposed on one side of the mounting plate (10); A guide shaft (30) is disposed on the other side of the mounting plate (10); A wire clamping assembly (40) is disposed on a guide shaft (30); A top sleeve (50) is axially movable between the wire clamping assembly (40) and the mounting plate (10); A drive motor (60) is disposed on one side of the mounting plate (10); A transmission screw (70), one end of which is connected to a drive motor (60) for transmission; The pressure adjusting nut (80) is threadedly connected to the transmission screw (70), and the pressure adjusting nut (80) is slidably connected to the guide seat (20) in the axial direction; The pressure adjusting spring (90) has one end abutting against the pressure adjusting nut (80) and the other end abutting against the top sleeve (50).

2. The built-in electronic wire clamp according to claim 1, characterized in that, The top sleeve (50) includes a top pressure plate (51) and an abutment slider (52). The top pressure plate (51) is axially movable and sleeved on the guide shaft (30). The mounting plate (10) has a sliding connection groove (11). One end of the abutment slider (52) is fixedly connected to the top pressure plate (51), and the other end of the abutment slider (52) passes through the sliding connection groove (11) and abuts against the other end of the pressure adjusting spring (90).

3. The built-in electronic wire clamp according to claim 2, characterized in that, The other end of the abutting slider (52) is provided with an abutting step (53) that matches the large-diameter end of the pressure adjusting spring (90).

4. The built-in electronic wire clamp according to claim 3, characterized in that, The abutting slider (52) is an arc-shaped slider, and there are two abutting sliders (52), and the two abutting sliders (52) are symmetrically arranged on both sides of the top pressure plate (51).

5. The built-in electronic wire clamp according to claim 1, characterized in that, The guide seat (20) includes a connecting plate (21), a connecting cylinder (22), and a mounting ring (23). The connecting cylinder (22) is fixedly connected between the connecting plate (21) and the mounting ring (23). The mounting ring (23) is fixedly connected to the mounting plate (10). A guide groove (24) is provided on the connecting cylinder (22) along the axial direction. The pressure adjusting nut (80) includes a nut part (81) and a guide part (82) fixedly connected. The nut part (81) is threadedly connected to the transmission screw (70). The guide part (82) is slidably connected in the guide groove (24).

6. The built-in electronic wire clamp according to claim 5, characterized in that, The adjusting nut (80) is T-shaped in general.

7. The built-in electronic wire clamp according to claim 1, characterized in that, The guide seat (20) includes a slide rail (25) and a connecting plate (26). The connecting plate (26) is fixedly connected to the mounting plate (10). One end of the slide rail (25) is fixedly connected to the connecting plate (26). One end of the pressure adjusting nut (80) is provided with a threaded hole (83), and the other end of the pressure adjusting nut (80) is provided with a guide groove (84). The transmission screw (70) is threadedly connected to the threaded hole (83), and the slide rail (25) is slidably connected to the guide groove (84).

8. A built-in electronic wire clamp according to claim 7, characterized in that, The number of guide slots (84) is two, and the two guide slots (84) are symmetrically arranged on both sides of the threaded hole (83).

9. A built-in electronic wire clamp according to claim 8, characterized in that, The pressure adjusting nut (80) includes a nut section (85), a process section (86), and a slotted section (87) that are circumferentially fixed. A threaded hole (83) is coaxially provided on the nut section (85). A guide slot (84) is provided along the axial direction on the slotted section (87). The thickness of the process section (86) is smaller than the distance between the two guide slots (84). A weight-reducing hole (88) is provided on the process section (86), and the weight-reducing hole (88) is connected to the threaded hole (83).

10. A built-in electronic wire clamp according to claim 7, characterized in that, A mounting bracket (100) is fixedly connected between the drive motor (60) and the mounting plate (10), and the pressure adjusting nut (80), transmission screw (70), pressure adjusting spring (90) and guide seat (20) are located in the inner cavity of the mounting bracket (100).

11. A built-in electronic wire clamp according to claim 1, characterized in that, One end of the guide shaft (30) is threadedly connected to the mounting plate (10), and the other end of the guide shaft (30) is provided with a stop ring (31).

12. The built-in electronic wire clamp according to claim 1, characterized in that, One end of the guide shaft (30) passes through the mounting plate (10) and is fixedly connected to the guide seat (20), and the other end of the guide shaft (30) is provided with a retaining ring (110).

13. A built-in electronic wire clamp according to claim 11 or 12, characterized in that, The wire clamping assembly (40) includes two wire clamping pieces (41), which are fitted face-to-face on the guide shaft (30).

14. A built-in electronic wire clamp according to claim 13, characterized in that, The wire clamping assembly (40) further includes a front pad (42) and / or a rear pad (43). The front pad (42) is disposed between the stop ring (31) or the retaining ring (110) and the wire clamping piece (41), and the front pad (42) is axially movable and sleeved on the guide shaft (30). The rear pad (43) is disposed between the top sleeve (50) and the wire clamping piece (41), and the rear pad (43) is axially movable and sleeved on the guide shaft (30).

15. A sewing machine, characterized in that, Includes the built-in electronic wire clamp according to any one of claims 1-14, wherein the number of the built-in electronic wire clamps is one or more, and the built-in electronic wire clamps are detachably and fixedly connected to the housing.

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