Integrated thread trapper and sewing machine

Abstract

The utility model discloses an integrated thread trapper and a sewing machine in the technical field of sewing machines. The integrated thread trapper comprises a thread passing plate, an outer switching sleeve and an inner switching shaft. An outer reset spring and an inner reset spring are arranged on one side of the wire passing plate, the outer switching sleeve is in sliding connection with the wire passing plate in the axis direction, the inner reset spring is connected between the wire passing plate and the outer switching sleeve, the inner switching shaft is sleeved with the outer switching sleeve in an axial moving mode, and the outer reset spring is connected between the wire passing plate and the inner switching shaft; a thread clamping piece, an outer supporting pad and an inner supporting pad are arranged on the other side of the thread passing plate, the thread clamping piece and the outer supporting pad are arranged on the outer switching sleeve in a sleeving mode, and the inner supporting pad is arranged on the inner switching shaft in a sleeving mode. According to the sewing machine clamping device, free adjustment and gear adjustment of the sewing thread clamping force are achieved, a user can directly use fabric conforming to the preset clamping force for sewing according to needs, the clamping force of the clamping device can also be freely adjusted, and the adjusting efficiency of the sewing thread clamping force is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field, concretely relates to integrated type thread clamp and sewing machine. BACKGROUND

[0002] The existing sewing machine is provided with a thread clamp to clamp and press the sewing thread (the clamping degree of the sewing thread is adjusted by changing the screw thread length to control the compression of the compression spring of the thread clamp), so that the other end of the sewing thread is sewn on the fabric with a certain tension, thereby producing an attractive stitch.

[0003] When sewing different fabrics, the tension requirement of the sewing thread is different, and the clamping degree of the thread clamp needs to be adjusted artificially. In order to adapt to the sewing requirements of different fabrics, the adjustment range of the screw thread length of the existing thread clamp is large. When different fabrics are replaced, repeated groping and multiple adjustments are needed to achieve an attractive stitch. Especially when the fabric characteristics span is large, a lot of time is spent to try to adjust the clamping degree, which is not only low in efficiency, but also requires a high level of experience of the debugging personnel.

[0004] Therefore, how to improve the adjustment efficiency of the clamping force of the thread clamp has become a technical problem to be solved by the technical personnel in the field. SUMMARY

[0005] Therefore, the utility model discloses a kind of integrated type thread clamp to solve the technical problem of low clamping force adjustment efficiency of existing thread clamp.

[0006] The technical scheme adopted by the utility model is as follows: an integrated type thread clamp, comprising a thread passing plate, an outer switching sleeve and an inner switching shaft.

[0007] One side of the thread passing plate is provided with an outer reset spring and an inner reset spring. The outer switching sleeve is slidably connected with the thread passing plate along the axial direction. The inner reset spring is connected between the thread passing plate and the outer switching sleeve. The inner switching shaft is axially movable and is sleeved in the outer switching sleeve. The outer reset spring is connected between the thread passing plate and the inner switching shaft.

[0008] The other side of the thread passing plate is provided with a thread clamping piece, an outer support pad and an inner support pad. The thread clamping piece is sleeved on the outer switching sleeve. The outer support pad is sleeved on the outer switching sleeve. When the outer switching sleeve moves axially, the outer support pad can move away from or close to the thread clamping piece. The inner support pad is sleeved on the inner switching shaft. When the inner switching shaft moves axially, the inner support pad can move away from or close to the thread clamping piece.

[0009] Preferably, one side of the wire passing plate is provided with a guide sleeve, the outer switching sleeve is sleeved in the guide sleeve and can move axially, a guide slot hole is formed in the guide sleeve, an outer switching limiting pin is arranged in the guide slot hole, and one end of the outer switching limiting pin is fixedly connected with the outer switching sleeve.

[0010] The inner reset spring is arranged between the guide sleeve and the outer switching sleeve, one end of the inner reset spring is abutted with the outer switching sleeve, and the other end of the inner reset spring is abutted with the wire passing plate.

[0011] Preferably, the outer switching sleeve is sleeved with a stop pad, the stop pad can move relative to the outer switching sleeve, the inner switching shaft is fixedly connected with an inner switching limiting pin which forms a stop cooperation with the stop pad, and one end of the outer switching sleeve is formed with an axial sliding groove matched with the inner switching limiting pin; the outer reset spring is sleeved on the outer switching sleeve, one end of the outer reset spring is abutted with the stop pad, and the other end of the outer reset spring is abutted with the wire passing plate.

[0012] Preferably, the outer support pad is located between the wire clamping piece and the inner support pad, the outer support pad is formed with an axial avoiding hole, one end of the inner support pad is formed with an extrusion plate, the axial size of the extrusion plate is greater than the axial size of the axial avoiding hole, and the extrusion plate is arranged in the axial avoiding hole.

[0013] Preferably, the other end of the outer switching sleeve is formed with an outer guide sliding groove, the outer support pad is sleeved on the outer switching sleeve, and an outer guide sliding block in the inner hole of the outer support pad is slidingly connected in the outer guide sliding groove; the end of the inner switching shaft is provided with a knob, and the knob is connected with the outer support pad through an outer compression spring.

[0014] Preferably, the knob and the outer compression spring are provided with a positioning cover which is slidingly connected with the inner switching shaft along the axial direction, and one end of the outer compression spring is abutted with the positioning cover.

[0015] Preferably, one end of the knob close to the positioning cover is formed with a movable gear disc, and one end of the positioning cover close to the knob is formed with a static gear disc engaged with the movable gear disc.

[0016] Preferably, the end of the inner switching shaft is formed with an inner guide sliding groove, the inner support pad is sleeved on the inner switching shaft, and an inner guide sliding block in the inner hole of the inner support pad is slidingly connected in the inner guide sliding groove; the end of the inner switching shaft is fixedly connected with a clamping spring, and the clamping spring is connected with the inner support pad through an inner compression spring.

[0017] Preferably, the inner support pad is sleeved on the outer switching sleeve, and the inner guide sliding block in the inner hole of the inner support pad passes through the outer guide sliding groove 17 and is slidingly connected in the inner guide sliding groove.

[0018] Preferably, the two said thread clamping pieces are sleeved on the outer switching sleeve in a face-to-face manner, and a buffer pad is arranged between the thread clamping piece and the thread passing plate, and a buffer pad is arranged between the thread clamping piece and the inner supporting pad, and the buffer pad is sleeved on the outer switching sleeve.

[0019] The second purpose of the utility model is to provide a sewing machine, which comprises the integrated thread clamp mentioned above.

[0020] The utility model has the advantages of:

[0021] The utility model adopts the mode that intermittent adjustment and continuous adjustment are combined, and through relative axial movement of the outer switching sleeve and the inner switching shaft, the outer supporting pad and the inner supporting pad are driven to move axially and press the thread clamping piece in turn, so that the outer supporting pad can exert continuously changing pressure on the thread clamping piece, the free adjustment of the thread clamping force of the thread clamp is realized, the inner supporting pad exerts intermittently changing pressure on the thread clamping piece, the gear adjustment of the thread clamping force of the thread clamp is realized, thus the preset clamping force adjustment that is adapted to part of the fabric is realized through the gear adjustment of the clamping force, the free clamping force adjustment that is adapted to part of the fabric is realized through the free adjustment of the clamping force, and the adjustment efficiency of the thread clamping force of the thread clamp is improved, and the dependence on the experience of the debugging personnel is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic view of the integrated thread clamp of the utility model;

[0023] Figure 2 It is a structural schematic view of the integrated thread clamp of the utility model;

[0024] Figure 3 It is an exploded schematic view of the integrated thread clamp of the utility model;

[0025] Figure 4 It is a structural schematic view of the guide sleeve;

[0026] Figure 5 It is a structural schematic view of the positioning cover;

[0027] Figure 6 It is a structural schematic view of the inner switching shaft;

[0028] Figure 7 It is a structural schematic view of the outer switching sleeve;

[0029] Figure 8 It is a structural schematic view of the outer supporting pad;

[0030] Figure 9 It is a structural schematic view of the inner supporting pad.

[0031] Explanation of reference numerals in the drawing:

[0032] 1. Wire guide plate; 2. Outer switching sleeve; 3. Inner switching shaft; 4. Outer return spring; 5. Inner return spring; 6. Wire clamping plate; 7. Outer support pad; 8. Inner support pad; 9. Guide sleeve; 10. Guide groove hole; 11. Outer switching limit pin; 12. Stop pad; 13. Inner switching limit pin; 14. Axial slide groove; 15. Axial clearance hole; 16. Extrusion plate; 17. Outer guide slide groove; 18. Outer guide slider; 19. Knob; 20. Outer pressure spring; 21. Positioning cover; 22. Moving gear plate; 23. Stationary gear plate; 24. Inner guide slide groove; 25. Inner guide slider; 26. Snap ring; 27. Inner pressure spring; 28. Buffer pad; 29. ​​Guide cylinder; 30. Connecting plate; 31. Retaining ring; 32. Snap groove; 33. Connecting slider; 34. Pin hole; 35. Connecting hole. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] Examples, such as Figures 1-9 As shown, an integrated wire clamp includes a wire guide plate 1, an outer switching sleeve 2, and an inner switching shaft 3.

[0038] The outer reset spring 4 is installed on one side of the wire passing plate 1, the outer switching sleeve 2 is slidably connected with the wire passing plate 1 in the axial direction, the inner reset spring 5 is connected between the wire passing plate 1 and the outer switching sleeve 2, so that the outer switching sleeve 2 can reciprocate axially under the action of external force and the inner reset spring 5; the inner switching shaft 3 is axially movably sleeved in the outer switching sleeve 2, and the outer reset spring 4 is connected between the wire passing plate 1 and the inner switching shaft 3, so that the inner switching shaft 3 can reciprocate axially under the action of external force and the outer reset spring 4.

[0039] The wire clamping piece 6, the outer supporting pad 7 and the inner supporting pad 8 are installed on the other side of the wire passing plate 1, the wire clamping piece 6 is sleeved on the outer switching sleeve 2, the outer supporting pad 7 is sleeved on the outer switching sleeve 2, and the outer supporting pad 7 can be away from or close to the wire clamping piece 6 when the outer switching sleeve 2 moves axially, and the inner supporting pad 8 is sleeved on the inner switching shaft 3, and the inner supporting pad 8 can be away from or close to the wire clamping piece 6 when the inner switching shaft 3 moves axially.

[0040] The utility model adopts the way that intermittent adjustment and continuous adjustment are combined, through the relative axial movement of the outer switching sleeve 2 and the inner switching shaft 3, the outer supporting pad 7 and the inner supporting pad 8 are driven to move axially and press the wire clamping piece 6 in turn, so that the outer supporting pad 7 can exert continuous change pressure on the wire clamping piece 6, realizes the free adjustment of the suture clamping force of the wire clamp, so that the inner supporting pad 8 exerts intermittent change pressure on the wire clamping piece 6, realizes the gear adjustment of the suture clamping force of the wire clamp, so as to realize the preset clamping force adjustment matched with part of the fabric through the gear adjustment of the clamping force, realize the free clamping force adjustment matched with part of the fabric through the free adjustment of the clamping force, and further improve the adjustment efficiency of the suture clamping force of the wire clamp.

[0041] It should be noted that: in the utility model, the inner supporting pad 8 can be directly sleeved on the inner switching shaft 3, or indirectly sleeved on the inner switching shaft 3.

[0042] Specific embodiment 1, as Figures 1-3 shown, an integrated wire clamp includes a wire passing plate 1, an outer switching sleeve 2 and an inner switching shaft 3.

[0043] The outer reset spring 4, the inner reset spring 5 and the guide sleeve 9 are installed on one side of the wire passing plate 1.

[0044] One end of the guide sleeve 9 is fixedly connected with the wire passing plate 1 perpendicularly, the outer switching sleeve 2 is arranged in the guide sleeve 9, one end of the outer switching sleeve 2 extends axially and penetrates through the wire passing plate 1, and the outer switching sleeve 2 and the wire passing plate 1 can move relatively in the axial direction; the inner reset spring 5 is installed between the wire passing plate 1 and the outer switching sleeve 2, so that the outer switching sleeve 2 can reciprocate in the axial direction under the action of external force and the inner reset spring 5.

[0045] Preferably, asFigure 2 and Figure 4 As shown, the guide sleeve 9 includes a guide cylinder 29 and a connecting plate 30. The connecting plate 30 is vertically fixedly connected to one end of the guide cylinder 29. The connecting plate 30 is located on one side of the wire guide plate 1, and the connecting plate 30 is detachably fixedly connected to the wire guide plate 1, for example, by screw connection. A guide groove 10 is formed at the other end of the guide cylinder 29. The guide groove 10 penetrates the cylinder wall of the guide cylinder 29 in the radial direction, and the guide groove 10 is set in the axial direction of the guide cylinder 29, that is, the groove length direction of the guide groove 10 is parallel to the axial direction of the guide sleeve 9.

[0046] An outer switching limit pin 11 is installed in the guide slot 10. The outer diameter of the outer switching limit pin 11 matches the width of the guide slot 10. The guide cylinder 29 is coaxially sleeved on the outer side of the middle part of the outer switching sleeve 2, and one end of the outer switching limit pin 11 is fixedly connected to the outer switching sleeve 2. Through the cooperation of the guide slot 10 and the outer switching limit pin 11, the axial sliding connection between the guide sleeve 9 and the outer switching sleeve 2 is realized, while preventing the outer switching sleeve 2 and the guide sleeve 9 from rotating relative to each other in the circumferential direction.

[0047] More preferably, such as Figure 2 and Figure 7 As shown, a retaining ring 31 is formed at one end of the outer switching sleeve 2. The outer diameter of the retaining ring 31 matches the inner diameter of the guide cylinder 29, and a connecting hole 35 is formed on the retaining ring 31. One end of the outer switching limiting pin 11 is inserted into the connecting hole 35, so that the outer switching limiting pin 11 and the outer switching sleeve 2 are detachably and fixedly connected. The inner return spring 5 is sleeved on the outer switching sleeve 2 and is located between the outer switching sleeve 2 and the guide sleeve 9. One end of the inner return spring 5 abuts against the retaining ring 31, and the other end of the inner return spring 5 abuts against the wire guide plate 1 or the connecting plate 30.

[0048] The inner switching shaft 3 is coaxially sleeved inside the outer switching sleeve 2, and the inner switching shaft 3 and the outer switching sleeve 2 can move relative to each other in the axial direction; the axial dimension of the inner switching shaft 3 is greater than the axial dimension of the outer switching sleeve 2, and both ends of the inner switching shaft 3 extend out from the outer switching sleeve 2; the outer return spring 4 is connected between the wire guide plate 1 and the inner switching shaft 3 so that the inner switching shaft 3 can reciprocate along the axial direction under the action of external force and the outer return spring 4.

[0049] Preferred, such as Figure 2 As shown, a retaining pad 12 is fitted on the outer switching sleeve 2. The retaining pad 12 and the outer switching sleeve 2 can move axially relative to each other in the axial direction, and the retaining pad 12 is axially fixedly connected to the inner switching shaft 3. The outer return spring 4 is fitted on the outer switching sleeve 2, that is, the outer return spring 4 is fitted on the outside of the guide sleeve 9, and one end of the outer return spring 4 abuts against the retaining pad 12, and the other end of the outer return spring 4 abuts against the wire guide plate 1.

[0050] More preferably, such as Figure 2 , Figure 6 and Figure 7 As shown, an inner switching limit pin 13 is fixedly connected to the inner switching shaft 3 to form a stop with the retaining pad 12. The inner switching limit pin 13 extends radially along the inner switching shaft 3, and an axial sliding groove 14 that cooperates with the inner switching limit pin 13 is formed at one end of the outer switching sleeve 2. The axial sliding groove 14 is located on the side of the retaining ring 31 away from the inner return spring 5, and the groove length direction of the axial sliding groove 14 is parallel to the axial direction of the outer switching sleeve 2, that is, the axial sliding groove 14 is set along the axial direction of the outer switching sleeve 2. The radial dimension of the inner switching limit pin 13 is adapted to the groove width dimension of the axial sliding groove 14 so that the inner switching shaft 3 and the outer switching sleeve 2 slide relative to each other in the axial direction, and can prevent the inner switching shaft 3 and the outer switching sleeve 2 from rotating relative to each other in the circumferential direction.

[0051] Specifically, a pin hole 34 is formed at one end of the inner switching shaft 3, and one end of the inner switching limiting pin 13 is inserted into the pin hole 34.

[0052] On the other side of the wire guide plate 1, there is a wire clamping piece 6, an outer support pad 7 and an inner support pad 8. The wire clamping piece 6 is sleeved on the outer switching sleeve 2. There are two wire clamping pieces 6, and the two wire clamping pieces 6 are sleeved on the outer switching sleeve 2 facing each other.

[0053] like Figure 3 , Figure 8 and Figure 9 As shown, the outer support pad 7 is coaxially sleeved on the outer switching sleeve 2, and when the outer switching sleeve 2 moves axially, the outer support pad 7 can move away from or closer to the clamping piece 6; the inner support pad 8 is coaxially sleeved on the inner switching shaft 3, and the outer support pad 7 is located between the clamping piece 6 and the inner support pad 8. An axial clearance hole 15 is formed on the outer support pad 7, and the axial clearance hole 15 penetrates the outer support pad 7 along the axial direction; an extrusion plate 16 is formed at one end of the inner support pad 8, and the extrusion plate 16 extends along the axial direction of the inner support pad 8. The axial dimension of the extrusion plate 16 is larger than the axial dimension of the axial clearance hole 15, and the extrusion plate 16 passes through the axial clearance hole 15 so that when the inner support pad 8 moves axially, the extrusion plate 16 can move away from or closer to the clamping piece 6.

[0054] Preferred, such as Figure 3 , Figure 7 and Figure 8 As shown, an outer guide groove 17 is formed at the other end of the outer switching sleeve 2. The outer guide groove 17 is arranged along the axial direction of the outer switching sleeve 2. The outer support pad 7 is coaxially sleeved on the outer switching sleeve 2. An outer guide slider 18 is formed in the inner hole of the outer support pad 7. The outer guide slider 18 is slidably connected in the outer guide groove 17 so that the outer support pad 7 and the outer switching sleeve 2 are slidably connected in the axial direction.

[0055] Preferred, such as Figure 3 , Figure 7 and Figure 9 As shown, an inner guide groove 24 is formed at the end of the inner switching shaft 3, and the inner guide groove 24 is arranged along the axial direction of the inner switching shaft 3; the inner support pad 8 is coaxially sleeved on the inner switching shaft 3, and an inner guide slider 25 is formed in the inner hole of the inner support pad 8, and the inner guide slider 25 is slidably connected in the inner guide groove 24 so that the inner switching shaft 3 and the inner support pad 8 are slidably connected in the axial direction.

[0056] Specific embodiment 2, such as Figures 1-9 As shown, an integrated wire clamp includes a wire guide plate 1, an outer switching sleeve 2, and an inner switching shaft 3.

[0057] An outer reset spring 4 and an inner reset spring 5 are provided on one side of the wire guide plate 1. The outer switching sleeve 2 is slidably connected to the wire guide plate 1 along the axial direction. The inner reset spring 5 is connected between the wire guide plate 1 and the outer switching sleeve 2 so that the outer switching sleeve 2 can reciprocate axially under the action of external force and the inner reset spring 5. The inner switching shaft 3 is axially movable and sleeved inside the outer switching sleeve 2. The outer reset spring 4 is connected between the wire guide plate 1 and the inner switching shaft 3 so that the inner switching shaft 3 can reciprocate axially under the action of external force and the outer reset spring 4.

[0058] On the other side of the wire guide plate 1, there is a wire clamping piece 6, an outer support pad 7 and an inner support pad 8. The wire clamping piece 6, the outer support pad 7 and the inner support pad 8 are sequentially sleeved on the outer switching sleeve 2, and the distance between the outer support pad 7 and the inner support pad 8 is set.

[0059] Preferred, such as Figure 2 and Figure 3 As shown, there are two clamping plates 6, and the two clamping plates 6 are fitted face to face on the outer switching sleeve 2. A buffer pad 28 is installed between the clamping plate 6 and the wire guide plate 1, and a buffer pad 28 is installed between the clamping plate 6 and the inner support pad 8. The buffer pad 28 is fitted on the outer switching sleeve 2, and the buffer pad 28 and the outer switching sleeve 2 can move relative to each other in the axial direction so that the axial force is applied more evenly to the two clamping plates 6.

[0060] like Figure 2As shown, the outer support pad 7 is coaxially sleeved on the outer switching sleeve 2, and when the outer switching sleeve 2 moves axially, the outer support pad 7 can move away from or closer to the clamping piece 6; the inner support pad 8 is sleeved on the outer switching sleeve 2 and connected to the inner switching shaft 3, and the outer support pad 7 is located between the clamping piece 6 and the inner support pad 8. An axial clearance hole 15 is formed on the outer support pad 7, and the axial clearance hole 15 penetrates the outer support pad 7 along the axial direction; an extrusion plate 16 is formed at one end of the inner support pad 8, and the extrusion plate 16 extends along the axial direction of the inner support pad 8. The axial dimension of the extrusion plate 16 is larger than the axial dimension of the axial clearance hole 15, and the extrusion plate 16 passes through the axial clearance hole 15 so that when the inner support pad 8 moves axially, the extrusion plate 16 can move away from or closer to the clamping piece 6.

[0061] Preferred, such as Figure 7 and Figure 8 As shown, an outer guide groove 17 is formed at the other end of the outer switching sleeve 2. The outer guide groove 17 is arranged along the axial direction of the outer switching sleeve 2, that is, the groove length direction of the outer guide groove 17 is parallel to the axial direction of the outer switching sleeve 2. An outer guide slider 18 is formed in the inner hole of the outer support pad 7. The outer guide slider 18 is arranged along the radial direction of the outer switching sleeve 2, and the radial dimension of the outer guide slider 18 matches the groove depth dimension of the outer guide groove 17, and the circumferential dimension of the outer guide slider 18 matches the groove width dimension of the outer guide groove 17.

[0062] The outer support pad 7 is coaxially sleeved on the outer switching sleeve 2, and the outer guide slider 18 in the inner hole of the outer support pad 7 is slidably connected in the outer guide groove 17, so that the outer support pad 7 and the outer switching sleeve 2 can move relative to each other in the axial direction and prevent the outer support pad 7 and the outer switching sleeve 2 from rotating relative to each other in the circumferential direction.

[0063] like Figure 2 As shown, a knob 19 is installed at the end of the inner switching shaft 3. The knob 19 is threaded to the other end of the inner switching shaft 3. An outer pressure spring 20 is connected between the outer support pad 7 and the knob 19. One end of the outer pressure spring 20 abuts against the outer support pad 7, and the other end of the outer pressure spring 20 abuts against the knob 19, so that the outer support pad 7 can abut against the outer switching sleeve 2 under the elastic force of the outer pressure spring 20. That is, under the elastic force of the outer pressure spring 20, the outer guide slider 18 can abut against one end of the outer guide groove 17.

[0064] like Figure 2 and Figure 6As shown, an inner guide groove 24 corresponding to the outer guide groove 17 is formed at the end of the inner switching shaft 3. The inner guide groove 24 is arranged along the axial direction of the inner switching shaft 3, that is, the groove length direction of the inner guide groove 24 is parallel to the axial direction of the inner switching shaft 3. The inner guide groove 24 and the outer guide groove 17 are located on the same diameter of the inner switching shaft 3, and the groove width of the inner guide groove 24 is less than or equal to the groove width of the outer guide groove 17.

[0065] like Figure 9 As shown, an inner guide slider 25 is formed in the inner hole of the inner support pad 8. The inner guide slider 25 is arranged radially along the inner switching shaft 3, and the radial dimension of the inner guide slider 25 matches the groove depth of the inner guide groove 24, and the circumferential dimension of the inner guide slider 25 matches the groove width of the inner guide groove 24. The inner support pad 8 is coaxially sleeved on the outer switching sleeve 2, and the inner guide slider 25 passes through the outer guide groove 17 and is inserted into the inner guide groove 24, so that the inner support pad 8, the outer switching sleeve 2, and the inner switching shaft 3 are slidably connected in the axial direction, thereby reducing the volume of the clamp.

[0066] A groove 32 is formed at the end of the inner switching shaft 3. A retaining spring 26 is fixedly installed in the groove 32. An inner pressure spring 27 is installed between the retaining spring 26 and the inner support pad 8. That is, the inner pressure spring 27 is sleeved on the inner switching shaft 3, and one end of the inner pressure spring 27 abuts against the retaining spring 26, while the other end of the inner pressure spring 27 abuts against the inner support pad 8.

[0067] More preferably, such as Figure 2 and Figure 5 As shown, a positioning cover 21 is installed between the knob 19 and the external pressure spring 20. The positioning cover 21 is coaxially sleeved on the inner switching shaft 3, and the positioning cover 21 and the inner switching shaft 3 can move relative to each other along the axial direction. The positioning cover 21 is generally tapered with one end thicker than the other end, and the large diameter end of the positioning cover 21 faces the outer support pad 7. The external pressure spring 20 is installed between the outer support pad 7 and the positioning cover 21, that is, one end of the external pressure spring 20 abuts against the outer support pad 7, and the other end of the external pressure spring 20 abuts against the positioning cover 21.

[0068] Preferably, the small-diameter end of the positioning cover 21 faces the knob 19, and a stationary toothed disc 23 is formed at the small-diameter end of the positioning cover 21, while a movable toothed disc 22 is formed at the end of the knob 19 near the positioning cover 21. The movable toothed disc 22 and the stationary toothed disc 23 mesh with each other to prevent the knob from loosening under vibration.

[0069] A connecting slider 33 is formed in the inner hole of the positioning cover 21. The connecting slider 33 is slidably connected in the inner guide groove 24 of the inner switching shaft 3 so that the positioning cover 21 and the inner switching shaft 3 are slidably connected in the axial direction and prevent the positioning cover 21 and the inner switching shaft 3 from rotating relative to each other in the circumferential direction.

[0070] Specific embodiment 3, a sewing machine, the sewing machine including the above-described integrated thread clamp.

[0071] The working process of the integrated wire clamp of this utility model is as follows:

[0072] When using the preset clamping scenario, the outer switching sleeve 2 is pushed out axially to the limit position, so that the outer guide slider 18 of the outer support pad 7 abuts against one end of the outer guide groove 17 of the outer switching sleeve 2. That is, the outer support pad 7 moves toward the knob 19 under the pushing action of the outer switching sleeve 2, so that a gap appears between the outer support pad 7 and the buffer pad 28. That is, the elastic force of the outer pressure spring 20 cannot act on the buffer pad 28, and the outer pressure spring 20 fails.

[0073] Simultaneously, the inner switching shaft 3 is moved axially to a set position (there is a gap between the inner support pad 8 and the outer support pad 7). The compression plate 16 of the inner support pad 8 contacts the buffer pad 28, and the inner pressure spring 27, under the action of the retaining spring 26, will generate a certain amount of compression. The pressure is then applied to the buffer pad 28 through the inner support pad 8, thereby causing the two clamping plates 6 to generate corresponding clamping forces on the sewing thread. Therefore, by presetting multiple axial positions for the inner switching shaft 3, the inner support pad 8 can generate different magnitudes of clamping forces on the sewing thread, thus realizing the adjustment of the preset clamping force of the clamping device.

[0074] When using the free adjustment mode, push the inner switching shaft 3 axially to the limit position, so that the inner guide slider 25 of the inner support pad 8 abuts against one end of the inner guide groove 24 of the inner switching shaft 3. That is, the inner support pad 8 moves toward the knob 19 under the pushing action of the inner switching shaft 3, so that a gap appears between the compression plate 16 of the inner support pad 8 and the buffer pad 28. That is, the elastic force of the inner pressure spring 27 cannot act on the buffer pad 28, and the inner pressure spring 27 fails.

[0075] At the same time, the outer switching sleeve 2 is moved axially to a predetermined position, so that the outer support pad 7 contacts the buffer pad 28 under the action of the outer pressure spring 20, and the outer support pad 7 can move back and forth axially on the outer switching sleeve 2. That is, the elastic force of the outer pressure spring 20 acts on the clamping plate 6. By changing the screw length of the knob 19 on the inner switching shaft 3, the compression amount of the outer pressure spring 20 can be changed, thereby adjusting the pressure of the outer support pad 7 on the clamping plate 6, so as to realize the free adjustment of the clamping force of the clamp.

[0076] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0077] This utility model's clamping device allows for free adjustment of the thread clamping force and the setting adjustment, enabling users to directly switch to sewing with fabrics that match the preset clamping force without complex adjustments. Furthermore, when the user cannot find a preset setting that matches the fabric, the clamping force can be freely adjusted to automatically adjust the thread tension. This reduces the time required to adjust the clamping tension of commonly used fabrics, while allowing users to freely adjust the thread clamping tension for non-standard fabrics.

[0078] 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 integrated wire clamp, characterized in that, It includes a wire guide plate (1), an outer switching sleeve (2), and an inner switching shaft (3); The wire guide plate (1) is provided with an outer reset spring (4) and an inner reset spring (5) on one side. The outer switching sleeve (2) is slidably connected to the wire guide plate (1) along the axial direction. The inner reset spring (5) is connected between the wire guide plate (1) and the outer switching sleeve (2). The inner switching shaft (3) is axially movable and sleeved inside the outer switching sleeve (2). The outer reset spring (4) is connected between the wire guide plate (1) and the inner switching shaft (3). The other side of the wire guide plate (1) is provided with a wire clamping piece (6), an outer support pad (7) and an inner support pad (8). The wire clamping piece (6) is sleeved on the outer switching sleeve (2). The outer support pad (7) is sleeved on the outer switching sleeve (2). When the outer switching sleeve (2) moves axially, the outer support pad (7) can move away from or closer to the wire clamping piece (6). The inner support pad (8) is sleeved on the inner switching shaft (3). When the inner switching shaft (3) moves axially, the inner support pad (8) can move away from or closer to the wire clamping piece (6).

2. The integrated wire clamp according to claim 1, characterized in that, A guide sleeve (9) is installed on one side of the wire guide plate (1). The outer switching sleeve (2) is axially movable and sleeved in the guide sleeve (9). A guide groove (10) is provided on the guide sleeve (9). An outer switching limit pin (11) is provided in the guide groove (10). One end of the outer switching limit pin (11) is fixedly connected to the outer switching sleeve (2). The inner reset spring (5) is housed between the guide sleeve (9) and the outer switching sleeve (2). One end of the inner reset spring (5) abuts against the outer switching sleeve (2), and the other end of the inner reset spring (5) abuts against the wire guide plate (1).

3. The integrated wire clamp according to claim 1, characterized in that, A retaining pad (12) is fitted on the outer switching sleeve (2). The retaining pad (12) and the outer switching sleeve (2) can move relative to each other. An inner switching limit pin (13) is fixedly connected to the inner switching shaft (3) to form a stop with the retaining pad (12). One end of the outer switching sleeve (2) is formed with an axial sliding groove (14) that cooperates with the inner switching limit pin (13). The outer return spring (4) is fitted on the outer switching sleeve (2). One end of the outer return spring (4) abuts against the retaining pad (12), and the other end of the outer return spring (4) abuts against the wire guide plate (1).

4. The integrated wire clamp according to claim 1, characterized in that, The outer support pad (7) is located between the clamping piece (6) and the inner support pad (8). An axial clearance hole (15) is formed on the outer support pad (7). An extrusion plate (16) is formed at one end of the inner support pad (8). The axial dimension of the extrusion plate (16) is larger than the axial dimension of the axial clearance hole (15), and the extrusion plate (16) passes through the axial clearance hole (15).

5. An integrated wire clamp according to claim 4, characterized in that, The other end of the outer switching sleeve (2) is formed with an outer guide groove (17), the outer support pad (7) is sleeved on the outer switching sleeve (2), and the outer guide slider (18) in the inner hole of the outer support pad (7) is slidably connected in the outer guide groove (17); the end of the inner switching shaft (3) is provided with a knob (19), and an outer pressure spring (20) is connected between the knob (19) and the outer support pad (7).

6. An integrated wire clamp according to claim 5, characterized in that, A positioning cover (21) is provided between the knob (19) and the outer pressure spring (20). The positioning cover (21) is slidably connected to the inner switching shaft (3) along the axial direction, and one end of the outer pressure spring (20) abuts against the positioning cover (21).

7. An integrated wire clamp according to claim 6, characterized in that, The knob (19) has a movable gear plate (22) formed at one end near the positioning cover (21), and the positioning cover (21) has a stationary gear plate (23) that meshes with the movable gear plate (22) at one end near the knob (19).

8. An integrated wire clamp according to claim 5, characterized in that, The end of the inner switching shaft (3) is formed with an inner guide groove (24), the inner support pad (8) is sleeved on the inner switching shaft (3), and the inner guide slider (25) in the inner hole of the inner support pad (8) is slidably connected in the inner guide groove (24); the end of the inner switching shaft (3) is fixedly connected with a snap ring (26), and an inner compression spring (27) is connected between the snap ring (26) and the inner support pad (8).

9. An integrated wire clamp according to claim 8, characterized in that, The inner support pad (8) is sleeved on the outer switching sleeve (2), and the inner guide slider (25) in the inner hole of the inner support pad (8) passes through the outer guide groove (17) and is slidably connected in the inner guide groove (24).

10. An integrated wire clamp according to claim 1, characterized in that, Two clamping plates (6) are fitted face to face on the outer switching sleeve (2), and a buffer pad (28) is provided between the clamping plates (6) and the wire guide plate (1). A buffer pad (28) is provided between the clamping plates (6) and the inner support pad (8), and the buffer pad (28) is fitted on the outer switching sleeve (2).

11. A sewing machine, characterized in that, The sewing machine includes the integrated thread clamp as described in any one of claims 1-10.

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