A wire loosening mechanism and synchronous vehicle
By designing a loose thread mechanism including transmission parts, loose thread retaining rings, rotating parts and loose thread plates, the problem that the synchronous vehicle cannot loosen the thread and the amount of loose thread cannot be adjusted when the power is cut off, and the loose thread operation and flexible adjustment of the loose thread during power off is achieved, which improves the sewing efficiency and quality.
Patent Information
- Application Number
- CN202421433000.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The existing synchronous vehicles cannot loosen the wire when the power is cut off, and the loosening amount of the mechanical loose wire structure cannot be adjusted, resulting in the problem of the surface wire being removed or being passed through.
A loose wire mechanism including a transmission member, a loose wire retaining ring, a rotary member and a loose wire plate is designed. The transmission member axially abuts the wire clamp, and the loose wire plate is driven by the rotary member to press the loose wire retaining ring to adjust the loose wire amount.
When power is cut off, loose thread is achieved through mechanical loose thread structure, which avoids the problem of thread passing. By adjusting the amount of loose thread, the problem of surface thread removal and thread clamping device is solved, and the sewing fluency is improved.
Smart Images
Figure CN222700581U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thread loosening of sewing machines, in particular to a thread loosening mechanism and a synchronous machine. Background Art
[0002] The thread release mechanism of the synchronous sewing machine is used to release the upper thread in time when the thread is trimmed at the end of sewing, so as to reserve a sufficient length of the starting thread for the next sewing, thereby preventing the upper thread from slipping off the needle. The common synchronous sewing machines with electronic thread release on the market do not have a mechanical thread release structure. In the case of power failure, the thread cannot be released when the presser foot is raised, resulting in thread passing trouble; the synchronous sewing machine with a mechanical thread release structure cannot adjust the thread release amount freely. If the thread release amount is too small, the above-mentioned upper thread slipping problem is likely to occur, while if the thread release amount is too large, the upper thread at the thread clamp will loosen and fall off the thread clamp. Utility Model Content
[0003] In view of the problem that the electronic wire loosening mechanism in the existing synchronous vehicle is difficult to pass the wire when the power is off and the deficiency that the wire loosening amount of the mechanical wire loosening structure cannot be adjusted, it is necessary to provide a wire loosening mechanism and a synchronous vehicle.
[0004] A wire loosening mechanism, used for abutting against a wire clamp, comprising:
[0005] A transmission member, used for axially abutting against the wire clamp;
[0006] A wire loosening retaining ring, the wire loosening retaining ring is fixedly connected to the transmission member, and the wire loosening retaining ring has a guiding inclined surface extending along the axial direction of the transmission member;
[0007] a rotating member having a rotating shaft and a connecting arm extending radially from the rotating shaft; and
[0008] A wire loosening plate is installed on the rotating member and abuts against the guide slope to drive the transmission member to move axially under the drive of the rotating member. The wire loosening plate is adjustably installed on the rotating member to adjust the radial distance between the abutment position of the wire loosening plate on the guide slope and the transmission member.
[0009] With this arrangement, the mechanical thread loosening structure is retained in the existing synchronous sewing machine with electronic thread loosening function. When the synchronous sewing machine is powered off, the thread can be loosened through the mechanical thread loosening structure, avoiding the problem that the lifting and pressing foot of the thread clamp cannot loosen the thread in the event of a power outage, and facilitating thread passing. Furthermore, the thread loosening amount of the mechanical thread loosening mechanism of the synchronous sewing machine can be adjusted, which facilitates adjustment during the initial debugging of the synchronous sewing machine and when switching fabrics of different thicknesses, thereby improving the sewing smoothness of the synchronous sewing machine.
[0010] In one embodiment, the rotating member includes a connecting arm and a fastener detachably mounted on the connecting arm, and the fastener abuts against the wire loosening plate toward the connecting arm to press the wire loosening plate against the connecting arm.
[0011] Such arrangement, using such a detachable fastener to fasten the connecting arm and the wire loosening plate, not only facilitates maintenance and replacement, but also makes the operation simple and easy to understand when adjusting the wire loosening amount of the wire loosening mechanism.
[0012] In one of the embodiments, the connecting arm is provided with an adjustment hole which penetrates along the axial direction of the transmission member, and the fastener is an axial screw which passes through the adjustment hole.
[0013] With such arrangement, the adjustment hole can also limit the axial screw, which helps to prevent the axial screw from accidentally falling off.
[0014] In one embodiment, the adjustment hole is a waist-shaped hole, and the fastener can be slidably inserted into the waist-shaped hole.
[0015] Such an arrangement further limits the range of motion of the axial screw, so that the sliding amount of the axial screw can correspond to the loosening amount of the wire loosening mechanism, thereby facilitating adjustment.
[0016] In one of the embodiments, the wire loosening plate is further provided with a threaded hole matching the axial screw.
[0017] With such arrangement, one end of the axial screw is fixed to the loosening plate, which prevents the axial screw from accidentally falling off. After loosening the axial screw, the axial screw will not shake at will, which also improves the accuracy of loosening adjustment and reduces the number of debugging times.
[0018] In one embodiment, the wire loosening plate is sleeved on the rotating shaft.
[0019] With this arrangement, the wire loosening plate and the connecting arm rotate coaxially. When the axial screw is loosened, the moving trajectory of one end of the wire loosening plate abutting against the guiding inclined surface is determined, which facilitates determination of the wire loosening amount and avoids repeated debugging.
[0020] In one of the embodiments, the wire release plate is provided with an open groove matching the shape of the transmission member.
[0021] With such arrangement, the open groove is used to make way for the transmission member when the wire loosening plate rotates, thereby preventing the wire loosening plate from hitting the transmission member during the rotation process and thus being unable to continue rotating.
[0022] In one embodiment, the wire loosening plate includes a connecting portion having the opening groove and mounted on the rotating member, and a bending portion extending obliquely from the connecting portion along the guiding slope and abutting against the guiding slope.
[0023] With such arrangement, the bending portion and the guiding inclined surface cooperate and abut, so that the wire loosening plate can more easily push the wire loosening retaining ring to move.
[0024] In one of the embodiments, the angle between the bending portion and the guiding slope and the radial plane of the transmission member is 25°.
[0025] Such an arrangement can ensure that the thread loosening mechanism has sufficient thread loosening capacity.
[0026] A synchronous vehicle, comprising:
[0027] Sewing machine body; and
[0028] As the thread loosening mechanism mentioned above, the thread loosening mechanism is installed on the sewing machine body.
[0029] With such a configuration, the synchronous sewing machine adopting the thread loosening mechanism provided by the present application can still perform the thread loosening operation when the electronic thread loosening mechanism cannot be powered off, thereby reducing the impact of operation pauses during power outages on sewing efficiency and sewing quality. Moreover, the thread loosening amount is adjustable, and can be adaptively adjusted when switching between sewing of fabrics of different thicknesses, thereby expanding the usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 A schematic diagram of a portion of the structure of a synchronous vehicle at a wire clamp in an embodiment provided in the present application;
[0031] Figure 2 It is a structural schematic diagram of the rotating part and the wire loosening plate;
[0032] Figure 3 for Figure 2 Schematic diagram of the structure of the center loose wire board.
[0033] Reference numerals:
[0034] 10. Transmission part; 11. Wire loosening rod; 12. Wire loosening nail; 20. Wire loosening retaining ring; 21. Guide slope; 30. Rotating part; 31. Connecting arm; 3101. Adjustment hole; 32. Fastener; 321. Axis screw; 33. Rotating shaft; 40. Wire loosening plate; 401. Threaded hole; 402. Mounting hole; 41. Connecting part; 411. Open groove; 42. Bending part; 50. Wire clamp; 51. First presser foot lifter; 52. Second presser foot lifter; 53. Return spring; 54. Limiting part; 60. Wire loosening electromagnet. DETAILED DESCRIPTION
[0035] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0041] The thread release mechanism of the synchronous sewing machine is used to release the upper thread in time when the thread is trimmed at the end of sewing, so as to reserve a sufficient length of the starting thread for the next sewing, thereby preventing the upper thread from falling off the needle. The common synchronous sewing machines with electronic thread release on the market do not have a mechanical thread release structure. When the power is off, the two presser feet of the thread clamp cannot release the thread, causing trouble in thread passing; the synchronous sewing machine with a mechanical thread release structure cannot adjust the thread release amount freely. If the thread release amount is too small, it is easy to cause the above-mentioned upper thread falling off the needle, while if the thread release amount is too large, the upper thread at the thread clamp will loosen and fall off the thread clamp.
[0042] Based on this, it is necessary to provide a wire loosening mechanism and a synchronous vehicle which can still loosen the wire normally and whose loosening amount can be adjusted when the electronic wire loosening mechanism is powered off.
[0043] See also Figure 1 , Figure 1A schematic diagram of the partial structure of the synchronous car at the wire clamp 50 in an embodiment provided in the present application. The wire clamp 50 includes a first presser foot 51, a second presser foot 52, a return spring 53 and a limiter 54 arranged coaxially. A wire loosening mechanism provided in the present application includes a transmission member 10, a wire loosening retaining ring 20, a rotating member 30 and a wire loosening plate 40. The wire clamp 50 and the wire loosening electromagnet 60 of the synchronous car are respectively arranged at both ends of the transmission member 10. The transmission member 10 includes a wire loosening rod 11 and a wire loosening nail 12. The wire loosening nail 12 is inserted into the wire clamp 50 and is used to axially abut the second presser foot 52 of the wire clamp 50. The wire loosening electromagnet 60 is spaced apart from the end of the transmission member 10 to increase the impact force of the wire loosening electromagnet 60 on the transmission member 10. The wire loosening retaining ring 20 is fixedly connected to the wire loosening rod 11, and the wire loosening retaining ring 20 has a guiding inclined surface 21 extending along the axial direction of the wire loosening rod 11, and the rotating member 30 has a rotating shaft 33 and a connecting arm 31 extending radially from the rotating shaft 33; the wire loosening plate 40 is installed on the rotating member 30 and abuts against the guiding inclined surface 21. Driven by the rotating member 30, the wire loosening plate 40 presses against the guiding inclined surface 21 of the wire loosening retaining ring 20 and pushes the wire loosening retaining ring 20 and the wire loosening rod 11 to move axially. The wire loosening plate 40 is adjustable and installed on the rotating member 30, so as to adjust the radial distance between the abutting position of the wire loosening plate 40 on the guiding inclined surface 21 and the wire loosening rod 11. In the present application, the mechanical wire loosening structure is retained in the existing synchronous car with electronic wire loosening function. When the synchronous car is powered off, the wire can be loosened by the mechanical wire loosening structure, avoiding the problem that the lifting and pressing foot of the wire clamp 50 cannot loosen the wire in the event of a power outage, and facilitating the wire passing. Furthermore, the thread loosening amount of the mechanical thread loosening mechanism of the synchronous machine can be adjusted, which facilitates debugging to improve the sewing smoothness of the synchronous machine. It is worth noting that the thread loosening plate 40 of the thread loosening mechanism is also used to stop the thread loosening retaining ring 20 and the thread loosening rod 11, and is used to reserve enough idle travel for the thread loosening electromagnet 60 so that the thread loosening electromagnet 60 has sufficient thrust.
[0044] Please continue reading Figure 1 Optionally, in one embodiment provided in the present application, the rotating member 30 includes a connecting arm 31 and a fastener 32 detachably mounted on the connecting arm 31, and the fastener 32 abuts against the wire loosening plate 40 toward the connecting arm 31 so that the wire loosening plate 40 is pressed against the connecting arm 31. The use of such a detachable fastener 32 to fasten the connecting arm 31 and the wire loosening plate 40 not only facilitates maintenance and replacement, but also makes the operation simple and easy to understand when adjusting the wire loosening amount of the wire loosening mechanism. It is understandable that in other embodiments, the connecting arm 31 and the wire loosening plate 40 may also be an interference fit, and the fastener 32 may be used to further supplement and reinforce them.
[0045] Please also read Figure 2 , Figure 2Schematic diagram of the structure of the rotating member 30 and the loosening plate 40. The connecting arm 31 is provided with an adjustment hole 3101 extending along the axial direction of the loosening rod 11, and the fastener 32 is an axial screw 321 and is inserted into the adjustment hole 3101. In this way, the adjustment hole 3101 can also limit the axial screw 321, which is helpful to prevent the axial screw 321 from falling off accidentally. It is worth noting that Figure 2 As shown, the axial screw 321 is located at the rightmost side of the connecting arm 31 , at which time the amount of loose wire is the largest, while when the amount of loose wire is the smallest, the axial screw 321 is located at the leftmost side of the connecting arm 31 .
[0046] Furthermore, in an embodiment provided in the present application, the adjustment hole 3101 is a waist-shaped hole, and the fastener 32 is slidably inserted into the waist-shaped hole. This further limits the range of motion of the axial screw 321, so that the sliding amount of the axial screw 321 can correspond to the loosening amount of the wire loosening mechanism, which facilitates adjustment.
[0047] Furthermore, in an embodiment provided in the present application, the loosening plate 40 is provided with a threaded hole 401 matching the axial screw 321. One end of the axial screw 321 is fixed to the loosening plate 40, which prevents the axial screw 321 from accidentally falling off. After the axial screw 321 is loosened, the axial screw 321 will not shake at will, which also improves the accuracy of the loosening amount adjustment and reduces the number of debugging times.
[0048] Furthermore, in an embodiment provided in the present application, the wire loosening plate 40 is provided with a mounting hole 402 and is sleeved on the rotating shaft 33. In this way, the wire loosening plate 40 and the connecting arm 31 rotate coaxially, and when the axial screw 321 is loosened, the moving track of one end of the wire loosening plate 40 abutting against the guiding inclined surface 21 is determined, which facilitates the determination of the wire loosening amount and avoids repeated debugging.
[0049] See also Figure 2 and Figure 3 , Figure 3 for Figure 2 The structural diagram of the middle loosening plate 40, optionally, the loosening plate 40 is provided with an open slot 411 matching the shape of the loosening rod 11. The open slot 411 is used to make way for the loosening rod 11 when the loosening plate 40 rotates to prevent the loosening plate 40 from hitting the loosening rod 11 during the rotation process and causing it to be unable to continue rotating.
[0050] See also Figure 2 Preferably, in an embodiment provided in the present application, the wire loosening plate 40 includes a connecting portion 41 having an opening groove 411 and mounted on the rotating member 30, and a bending portion 42 extending obliquely from the connecting portion 41 along the guiding inclined surface 21 and abutting against the guiding inclined surface 21. The bending portion 42 cooperates with and abuts against the guiding inclined surface 21, so that the wire loosening plate 40 is more likely to push the wire loosening retaining ring 20 to move.
[0051] For details, please refer to Figure 2, please refer to the figure, the angle between the bending portion 42 and the guiding inclined surface 21 and the radial plane of the wire loosening rod 11 is 25°. This can ensure that the wire loosening mechanism has sufficient wire loosening capacity.
[0052] The present application also provides a synchronous machine, comprising a sewing machine body and a thread loosening mechanism as described above, the thread loosening mechanism being mounted on the sewing machine body. The rotating member 30 is rotatably mounted on the thread loosening mechanism, and it is understood that in other embodiments, the rotating shaft 33 of the rotating member 30 can also be fixedly connected to the sewing machine body, and the connecting arm 31 can be rotatably sleeved on the rotating shaft 33.
[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0054] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A thread loosening mechanism, used to abut against a thread clamp (50), characterized in that: include: A transmission member (10) for axially abutting against the wire clamp (50); A wire loosening retaining ring (20), the wire loosening retaining ring (20) being fixedly connected to the transmission member (10), the wire loosening retaining ring (20) having a guiding inclined surface (21) extending along the axial direction of the transmission member (10); A rotating member (30) having a rotating shaft (33) and a connecting arm (31) extending radially from the rotating shaft (33); and A wire loosening plate (40) is installed on the rotating member (30) and abuts against the guiding inclined surface (21) so as to drive the transmission member (10) to move axially under the drive of the rotating member (30). The wire loosening plate (40) is adjustably installed on the rotating member (30) so as to adjust the radial distance between the abutting position of the wire loosening plate (40) on the guiding inclined surface (21) and the transmission member (10).
2. A wire loosening mechanism according to claim 1, characterized in that: The rotating member (30) comprises a connecting arm (31) and a fastener (32) detachably mounted on the connecting arm (31); the fastener (32) abuts against the wire loosening plate (40) toward the connecting arm (31) so that the wire loosening plate (40) is pressed against the connecting arm (31).
3. A wire loosening mechanism according to claim 2, characterized in that: The connecting arm (31) is provided with an adjustment hole (3101) which penetrates along the axial direction of the transmission member (10), and the fastener (32) is an axial screw (321) which is inserted into the adjustment hole (3101).
4. A wire loosening mechanism according to claim 3, characterized in that: The adjustment hole (3101) is a waist-shaped hole, and the fastener (32) can be slidably inserted into the waist-shaped hole.
5. A wire loosening mechanism according to claim 3, characterized in that: The thread loosening plate (40) is also provided with a threaded hole (401) matching the axial screw (321).
6. A wire loosening mechanism according to claim 5, characterized in that: The wire loosening plate (40) is sleeved on the rotating shaft (33).
7. A wire loosening mechanism according to any one of claims 1 to 6, characterized in that: The wire loosening plate (40) is provided with an opening groove (411) matching the shape of the transmission member (10).
8. A wire loosening mechanism according to claim 7, characterized in that: The wire loosening plate (40) comprises a connecting portion (41) having the opening groove (411) and mounted on the rotating member (30), and a bending portion (42) extending obliquely from the connecting portion (41) along the guiding inclined surface (21) and abutting against the guiding inclined surface (21).
9. A wire loosening mechanism according to claim 8, characterized in that: The angle between the bent portion (42) and the guiding inclined surface (21) and the radial plane of the transmission member (10) is 25°.
10. A synchronous vehicle, characterized in that: include: Sewing machine body; and A thread loosening mechanism as described in any one of claims 1 to 9, wherein the thread loosening mechanism is installed on the sewing machine body.