Electromagnetic auxiliary thread trapper and sewing machine

Abstract

The utility model discloses an electromagnetic auxiliary thread trapper and a sewing machine in the technical field of sewing machines, and the electromagnetic auxiliary thread trapper comprises an electromagnet, a thread clamping piece, an adjusting check block, a spring, a knob and an installation mandrel, a magnet cover plate is installed at one end of the electromagnet, and an iron mandrel capable of moving axially is arranged in the electromagnet; one end of the mounting core shaft axially penetrates through the magnet cover plate and is fixedly connected with the iron core shaft; the two thread clamping pieces sleeve the mounting mandrel face to face, the knob is fixedly connected with the other end of the mounting mandrel, and the spring is mounted between the knob and the thread clamping pieces; and the adjusting stop block is fixedly mounted on the mounting mandrel and is positioned between the knob and the thread clamping sheet. The thread trapper not only has the thread clamping function of a mechanical thread trapper, but also can change the clamping force to the sewing thread through the electromagnet, so that the automatic adjustment of the clamping force to the sewing thread by the thread trapper is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to an electromagnetic auxiliary thread clamp and a sewing machine. Background Art

[0002] Nowadays, sewing machines usually have two thread clamps, namely the main thread clamp and the auxiliary thread clamp. The auxiliary thread clamp is generally a mechanical thread clamp that changes the clamping force by changing the spring stroke.

[0003] Patent document CN205046327U discloses an electronic thread clamp for a sewing machine, which is used to avoid the "bird's nest" phenomenon during the sewing process. The electronic thread clamp uses the magnetic force of the electromagnet on the iron core (also called the iron core shaft) when it is energized, so that the thimble of the iron core shaft can push the loosening plate to drive the spring to move, thereby separating the two thread clamps and achieving the purpose of loosening the thread. Although the electronic thread clamp achieves the thread clamping function, it relies on the elastic force generated by the compression spring to apply the clamping force to the thread clamp. During the entire sewing process, the electromagnet needs to be in a energized state, which consumes a lot of power and has high production costs.

[0004] Therefore, how to realize automatic adjustment of the suture clamping force of the auxiliary thread clamp has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an electromagnetic auxiliary thread clamp to address the above technical problems, so as to realize automatic adjustment of the clamping force of the suture by the auxiliary thread clamp.

[0006] The technical solution adopted by the present invention is: an electromagnetic assisted wire clamp, comprising an electromagnet, a wire clamping piece, an adjusting block, a spring, a knob and a mounting core shaft, a magnet cover being installed at one end of the electromagnet, an iron core shaft which can move axially being provided inside the electromagnet, one end of the mounting core shaft axially passing through the magnet cover and being fixedly connected to the iron core shaft; two wire clamping pieces are arranged face to face on the mounting core shaft, the knob is fixedly connected to the other end of the mounting core shaft, and the spring is installed between the knob and the wire clamping piece; the adjusting block is fixedly installed on the mounting core shaft and is located between the knob and the wire clamping piece, and the axial distance between the adjusting block and the wire clamping piece is less than the axial displacement of the iron core shaft when the electromagnet is energized.

[0007] Preferably, the mounting core shaft includes an optical axis segment and a threaded segment that are coaxially fixedly connected, the radial dimension of the optical axis segment is larger than the radial dimension of the threaded segment, and one end of the optical axis segment is fixedly connected to the iron core shaft, and one end of the threaded segment is threadedly connected to the knob.

[0008] Preferably, a guide slot is formed on the optical axis segment, the slot length direction of the guide slot is parallel to the axial direction of the mounting core shaft, a limiting shaft is passed through the guide slot, and the end of the limiting shaft is fixedly connected to the magnet cover.

[0009] Preferably, the guide slot is a waist-shaped circular slot that radially passes through the optical axis segment, and the slot width of the waist-shaped circular slot is equal to the radial dimension of the limiting axis.

[0010] Preferably, the magnet cover plate includes a large diameter section and a small diameter section that are coaxially fixedly connected, the large diameter section is fixedly connected to the shell base of the electromagnet, the wire passing plate is sleeved and installed on the small diameter section, a radial mounting hole is formed on the small diameter section, and the end of the limiting shaft is fixedly connected to the radial mounting hole.

[0011] Preferably, a wire passing plate is provided between the electromagnet and the wire clamping piece, and the wire passing plate is sleeved and mounted on the small diameter section of the magnet cover plate.

[0012] Preferably, the adjustment block is threadedly connected to the other end of the threaded section.

[0013] Preferably, the mounting core shaft is coaxially arranged with the iron core shaft and formed integrally.

[0014] Another object of the present invention is to provide a sewing machine comprising the electromagnetic auxiliary thread clamp.

[0015] Beneficial effects of the utility model:

[0016] The utility model has an adjusting block fixedly connected to the mounting core shaft, which is located between the thread clamping piece and the knob. During the sewing process, a spring installed between the thread clamping piece and the knob can apply a clamping force to the thread clamping piece to ensure the normal movement of the suture. After the electromagnet is energized, the iron core shaft of the electromagnet drives the adjusting block on the mounting core shaft to move axially and squeeze the thread clamping piece, so that the clamping force of the two thread clamping pieces on the suture is increased, thereby realizing automatic adjustment of the clamping force of the thread clamp on the suture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the electromagnetic auxiliary wire clamp of the present utility model;

[0018] Figure 2 This is a schematic structural diagram of the electromagnetic auxiliary wire clamp of the present utility model;

[0019] Figure 3 This is an exploded diagram of the electromagnetic assisted wire clamp of the present invention;

[0020] Figure 4 It is a structural diagram of the iron core shaft and the mounting core shaft;

[0021] Figure 5 It is a three-dimensional schematic diagram of the magnet cover.

[0022] Description of reference numerals in the figures:

[0023] 10. Electromagnet; 11. Magnet cover; 12. Iron core shaft; 13. Shell base; 14. Coil; 15. Large diameter section; 16. Small diameter section; 17. Radial mounting hole;

[0024] 20. Wire board;

[0025] 30. Wire clamp;

[0026] 40. Adjust the stopper;

[0027] 50. Spring;

[0028] 60. Knob;

[0029] 70. Limit axis;

[0030] 80. Mounting core shaft; 81. Optical axis section; 82. Threaded section; 83. Guide slot hole. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0035] Examples, such as Figure 1-Figure 5 As shown, an electromagnetic auxiliary wire clamp includes an electromagnet 10, a wire clamping piece 30, an adjustment block 40, a spring 50, a knob 60 and a mounting core shaft 80.

[0036] A magnet cover 11 is mounted on one end of the electromagnet 10 , and an axially movable iron core shaft 12 is disposed inside the electromagnet 10 .

[0037] One end of the mounting core shaft 80 extends axially and is fixedly connected to the core shaft 12 after passing through the magnet cover 11 , so that the axial movement of the core shaft 12 drives the mounting core shaft 80 to move axially.

[0038] There are two clamping pieces 30 , which are sleeved on the mounting core shaft 80 face to face, and the clamping pieces 30 and the mounting core shaft 80 can move relative to each other.

[0039] The knob 60 is fixedly connected to the other end of the mounting core shaft 80 .

[0040] The spring 50 is installed between the knob 60 and the clamping piece 30 .

[0041] The adjusting block 40 is fixedly mounted on the mounting core shaft 80 and is located between the knob 60 and the wire clamping piece 30, and the axial distance between the adjusting block 40 and the wire clamping piece 30 is smaller than the axial displacement of the iron core shaft 12 when the electromagnet 10 is energized, so that when the electromagnet 10 is energized, the iron core shaft 12 drives the adjusting block 40 to move axially and squeeze the wire clamping piece 30 through the mounting core shaft 80.

[0042] The utility model has an adjusting block 40 fixedly connected to the mounting core shaft 80 fixedly connected to the iron core shaft 12, and the adjusting block 40 is located between the thread clamping piece 30 and the knob 60. During the sewing process, the spring 50 installed between the thread clamping piece 30 and the knob 60 can apply a clamping force to the thread clamping piece 30 to ensure the normal movement of the suture. After the electromagnet 10 is energized, the iron core shaft 12 of the electromagnet 10 can drive the adjusting block 40 on the mounting core shaft 80 to move axially and squeeze the thread clamping piece 30, so that the clamping force of the two thread clamping pieces 30 on the suture is increased, thereby realizing automatic adjustment of the clamping force of the suture by the thread clamp.

[0043] Specific embodiment 1, as Figure 1-Figure 5 As shown, an electromagnetic assisted wire clamp includes an electromagnet 10, a wire passing plate 20, a wire clamping piece 30, an adjustment block 40, a spring 50, a knob 60 and a mounting core shaft 80.

[0044] The electromagnet 10 includes a shell base 13, a magnet cover 11, an iron core shaft 12 and a coil 14. One end of the shell base 13 is open, and the iron core shaft 12 is installed in the shell base 13 so as to be axially movable, and one end of the iron core shaft 12 is slidably connected to the shell base 13. The coil 14 is installed in the shell base 13, and the coil 14 is coaxially arranged on the outside of the iron core shaft 12; the magnet cover 11 is installed at the open end of the shell base 13, and the magnet cover 11 is detachably fixedly connected to the shell base 13.

[0045] It should be noted that: one end of the shell-type base 13 is open, and is an integrated structure consisting of a shell and a static iron core; the iron core shaft 12 is an integrated structure consisting of a moving iron core and a shaft body.

[0046] The magnet cover 11 includes a large diameter section 15 and a small diameter section 16 , which are coaxially arranged and fixedly connected so that the magnet cover 11 is stepped as a whole; the large diameter section 15 is fixedly connected to the shell base 13 of the electromagnet 10 .

[0047] The wire-passing plate 20 is sleeved and mounted on the small-diameter section 16 of the magnet cover 11 , and the wire-passing plate 20 is fixedly connected to the large-diameter section 15 of the magnet cover 11 by screws.

[0048] The mounting core shaft 80 includes an optical axis segment 81 and a threaded segment 82, the optical axis segment 81 and the threaded segment 82 are coaxially fixedly connected, and the radial dimension of the optical axis segment 81 is larger than the radial dimension of the threaded segment 82; one end of the optical axis segment 81 extends axially and is fixedly connected to the iron core shaft 12 after passing through the magnet cover plate 11, that is, the optical axis segment 81 of the mounting core shaft 80 is fixedly connected to the iron core shaft 12 through the through hole, so that the axial movement of the iron core shaft 12 drives the mounting core shaft 80 to move axially.

[0049] There are two clamping pieces 30 , which are mounted face to face on the optical axis section 81 of the mounting core shaft 80 , and the clamping pieces 30 and the optical axis section 81 can move relative to each other, and one of the clamping pieces 30 abuts against the end face of the small diameter section 16 of the magnet cover plate 11 .

[0050] The knob 60 is threadedly connected to the other end of the threaded section 82 of the mounting core shaft 80 and is used to manually adjust the clamping force of the thread clamping piece 30 on the suture.

[0051] The spring 50 is sleeved on the outside of the mounting core shaft 80 , and the spring 50 is installed between the knob 60 and the clamping piece 30 to apply a clamping force to the clamping piece 30 .

[0052] The adjustment block 40 is an adjustment nut, which is located between the knob 60 and the wire clamp 30. The adjustment nut is threadedly connected to the other end of the threaded section 82, and the axial distance between the adjustment nut and the wire clamp 30 is less than the axial displacement of the iron core shaft 12 when the electromagnet 10 is energized. When the electromagnet 10 is energized, the iron core shaft 12 drives the adjustment nut to move axially and squeeze the wire clamp 30 through the installation core shaft 80, so that the two wire clamps 30 clamp and fix the suture.

[0053] Specific embodiment 2, as Figure 1-Figure 5 As shown, an electromagnetic assisted wire clamp includes an electromagnet 10, a wire clamping piece 30, an adjustment block 40, a spring 50, a knob 60, a limit shaft 70 and a mounting core shaft 80.

[0054] The electromagnet 10 includes a shell base 13, a magnet cover 11, an iron core shaft 12 and a coil 14. One end of the shell base 13 is open, and the iron core shaft 12 is installed in the shell base 13 so as to be axially movable, and one end of the iron core shaft 12 is slidably connected to the shell base 13. The coil 14 is installed in the shell base 13, and the coil 14 is coaxially arranged on the outside of the iron core shaft 12; the magnet cover 11 is installed at the open end of the shell base 13, and the magnet cover 11 is detachably fixedly connected to the shell base 13.

[0055] The magnet cover 11 includes a large diameter section 15 and a small diameter section 16. The large diameter section 15 and the small diameter section 16 are coaxially arranged and fixedly connected, so that the magnet cover 11 as a whole is stepped; the large diameter section 15 is fixedly connected to the shell base 13 of the electromagnet 10, and a radial mounting hole 17 is formed on the small diameter section 16. The radial size of the radial mounting hole 17 is adapted to the limiting shaft 70. The radial mounting hole 17 passes through the magnet cover 11 in the radial direction, and a through hole is coaxially arranged on the magnet cover 11, which is connected to the radial mounting hole 17.

[0056] The mounting core shaft 80 and the iron core shaft 12 are an integrally formed structure, and the mounting core shaft 80 includes a coaxially arranged optical axis segment 81 and a threaded segment 82, the optical axis segment 81 and the threaded segment 82 are integrally formed, and the radial dimension of the optical axis segment 81 is greater than the radial dimension of the threaded segment 82; one end of the optical axis segment 81 extends axially and is fixedly connected to the iron core shaft 12 after passing through the magnet cover plate 11, that is, the optical axis segment 81 of the mounting core shaft 80 is fixedly connected to the iron core shaft 12 through the through hole, so that the axial movement of the iron core shaft 12 drives the mounting core shaft 80 to move axially.

[0057] A guide slot 83 is formed on the optical axis section 81 of the mounting core shaft 80, and the slot length direction of the guide slot 83 is parallel to the axial direction of the mounting core shaft 80. The guide slot 83 is a waist-shaped slot that radially penetrates the optical axis section 81, and the slot length dimension of the guide slot 83 is greater than the radial dimension of the limiting shaft 70, and the slot width dimension of the guide slot 83 is equal to the radial dimension of the limiting shaft 70. The limiting shaft 70 is passed through the guide slot 83, and the end of the limiting shaft 70 is inserted into the radial mounting hole 17, that is, one end or both ends of the limiting shaft 70 are fixedly connected to the magnet cover plate 11, so that the mounting core shaft 80 and the magnet cover plate 11 are fixedly connected in the circumferential direction of the mounting core shaft 80, and the mounting core shaft 80 and the magnet cover plate 11 can move relative to each other in the axial direction of the mounting core shaft 80.

[0058] There are two clamping pieces 30 , which are mounted face to face on the optical axis section 81 of the mounting core shaft 80 , and the clamping pieces 30 and the optical axis section 81 can move relative to each other, and one of the clamping pieces 30 abuts against the end face of the small diameter section 16 of the magnet cover plate 11 .

[0059] The knob 60 is threadedly connected to the other end of the threaded section 82 of the mounting core shaft 80 and is used to manually adjust the clamping force of the thread clamping piece 30 on the suture.

[0060] The spring 50 is sleeved on the outside of the mounting core shaft 80 , and the spring 50 is installed between the knob 60 and the clamping piece 30 to apply a clamping force to the clamping piece 30 .

[0061] The adjustment block 40 is an adjustment nut, which is located between the knob 60 and the wire clamp 30. The adjustment nut is threadedly connected to the other end of the threaded section 82, and the axial distance between the adjustment nut and the wire clamp 30 is less than the axial displacement of the iron core shaft 12 when the electromagnet 10 is energized. When the electromagnet 10 is energized, the iron core shaft 12 drives the adjustment nut to move axially and squeeze the wire clamp 30 through the installation core shaft 80, so that the two wire clamps 30 clamp and fix the suture.

[0062] An embodiment provides a sewing machine, comprising the electromagnetic auxiliary thread tensioner.

[0063] The use process of the wire clamp of the utility model is as follows:

[0064] During normal sewing, the thread tension is manually adjusted by rotating the knob 60 to compress the spring 50 .

[0065] When needed, the electromagnet 10 is energized to pull back the iron core shaft 12, thereby driving the adjusting nut on the mounting core shaft 80 to press the two clamping pieces 30 onto the magnet cover 11. The suture tension is automatically adjusted through the output change of the electromagnet 10.

[0066] Compared with the existing technology, this application has at least the following beneficial technical effects:

[0067] The thread clamp of the utility model not only has the thread clamping function of a mechanical thread clamp, but also can change the clamping force on the suture through the electromagnet.

[0068] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. An electromagnetic assisted wire clamp, characterized in that: The invention comprises an electromagnet (10), a clamping piece (30), an adjusting block (40), a spring (50), a knob (60) and an installation core shaft (80), wherein one end of the electromagnet (10) is provided with a magnet cover plate (11), an iron core shaft (12) capable of axial movement is provided inside the electromagnet (10), one end of the installation core shaft (80) axially penetrates the magnet cover plate (11) and is fixedly connected to the iron core shaft (12); two clamping pieces (30) are arranged face to face. On the mounting core shaft (80), the knob (60) is fixedly connected to the other end of the mounting core shaft (80), and the spring (50) is installed between the knob (60) and the clamping piece (30); the adjusting block (40) is fixedly installed on the mounting core shaft (80) and is located between the knob (60) and the clamping piece (30), and the axial distance between the adjusting block (40) and the clamping piece (30) is smaller than the axial displacement of the iron core shaft (12) when the electromagnet (10) is energized.

2. The electromagnetic assisted wire clamp according to claim 1, characterized in that: The mounting core shaft (80) comprises an optical axis section (81) and a threaded section (82) that are coaxially fixedly connected, the radial dimension of the optical axis section (81) being larger than the radial dimension of the threaded section (82), one end of the optical axis section (81) being fixedly connected to the iron core shaft (12), and one end of the threaded section (82) being threadedly connected to the knob (60).

3. The electromagnetic assisted wire clamp according to claim 2, characterized in that: A guide slot (83) is formed on the optical axis section (81), the slot length direction of the guide slot (83) is parallel to the axial direction of the mounting core shaft (80), a limiting shaft (70) is passed through the guide slot (83), and the end of the limiting shaft (70) is fixedly connected to the magnet cover plate (11).

4. The electromagnetic assisted wire clamp according to claim 3, characterized in that: The guide slot hole (83) is a waist-shaped circular slot that radially penetrates the optical axis segment (81), and the slot width of the waist-shaped circular slot is equal to the radial dimension of the limiting shaft (70).

5. The electromagnetic assisted wire clamp according to claim 3, characterized in that: The magnet cover plate (11) comprises a large diameter section (15) and a small diameter section (16) which are coaxially fixedly connected, the large diameter section (15) being fixedly connected to the shell base (13) of the electromagnet (10), the small diameter section (16) being formed with a radial mounting hole (17), and the end of the limiting shaft (70) being fixedly connected to the radial mounting hole (17).

6. The electromagnetic assisted wire clamp according to claim 5, characterized in that: A wire-passing plate (20) is provided between the electromagnet (10) and the wire-clamping plate (30), and the wire-passing plate (20) is sleeved and mounted on the small-diameter section (16) of the magnet cover plate (11).

7. The electromagnetic assisted wire clamp according to claim 2, characterized in that: The adjusting stopper (40) is threadedly connected to the other end of the threaded section (82).

8. The electromagnetic assisted wire clamp according to claim 1, characterized in that: The mounting core shaft (80) and the iron core shaft (12) are coaxially arranged and integrally formed.

9. A sewing machine, characterized in that: The sewing machine comprises the electromagnetic assisted thread clamp according to any one of claims 1 to 8.

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