Electronic thread loosening device

Abstract

The utility model belongs to the technical field of thread loosening structures of sewing machines, and particularly relates to an electronic thread loosening device. Comprising a thread clamping device and a power source and further comprises a mounting shaft, a thread loosening lifting pin and a thread loosening top plate arranged on the mounting shaft in a sleeving mode, the thread loosening top plate is provided with a first abutting portion and a second abutting portion which are arranged in the axis direction of the mounting shaft in a spaced mode, and the thread loosening lifting pin abuts against the first abutting portion and is driven by the power source to act. The second abutting part abuts against one end of the thread loosening auxiliary nail, and the other end of the thread loosening auxiliary nail abuts against a thread loosening nail of the thread clamping device. According to the thread loosening device, the thread loosening top plate is arranged, and the axes of the thread loosening lifting pin and the thread loosening auxiliary nail are arranged at intervals in the axis direction of the mounting shaft, so that the mounting position of the electromagnet is adjusted, a space is reserved, and further optimization design of a sewing machine is facilitated, for example, the reserved space is used for mounting a rear towing wheel device and the like.

Description

Technical field:

[0001] The utility model belongs to the technical field of thread loosening structures of sewing machines, in particular to an electronic thread loosening device. Background technology:

[0002] The thread tensioner is used to loosen and clamp the thread and control the thread tension. The thread tensioner often loosens the thread when trimming the thread, which can prevent the thread from being in a tight state when trimming the thread. After trimming the thread, it can prevent the upper thread from being too short when it is exposed to the needle hole. Therefore, the thread tensioner needs to loosen the thread during the trimming process.

[0003] The Chinese utility model patent (grant announcement number CN 204780185U, application date 2015.05.21, grant announcement date 2015.11.18) discloses an electronic thread loosening device for a sewing machine. When the thread is loosened, the electromagnet is started, and the electromagnet drives the telescopic shaft to move rightward, and the telescopic shaft pushes the ejector rod to the right, and the reset block on the ejector rod moves rightward together, compressing the second spring; the ejector rod pushes the ejector pin to the right, and the left part of the ejector pin is pushed to the right, transmitting the force to the horizontal part, thereby evenly pushing the ejector block, driving the lower seat of the spring upward. Movement, at this time the first spring is further compressed, the upper and lower thread clamping pieces are not subjected to pressure, thereby achieving the effect of loosening the thread; when the thread loosening stops, the electromagnet is closed, the telescopic shaft returns to its original position, and at the same time the second spring on the push rod must restore its elastic deformation, driving the reset block to move to the left, thereby driving the push rod to return to its original position, at this time, when the force on the left side of the ejector pin is eliminated, the first spring will restore its elastic deformation, pressing the lower seat of the spring downward, so that the upper and lower thread clamping pieces are in a stressed state, re-clamping the thread, and at the same time the ejector pin will be pressed back to its original position by the ejector block. From the above and in combination with the drawings in the specification of the patent, it can be seen that the telescopic shaft 16, push rod 11, and ejector pin 9 of the above-mentioned electronic thread loosening device are basically arranged on the same straight line, and the electromagnet and the thread loosening device are located on the opposite side walls of the sewing machine casing. Due to the limitation of the installation position of the thread loosening device, after the electromagnet is installed, there is no installation space for other supporting components of the sewing machine, which has certain limitations on the optimization design of the sewing machine. Summary of the invention:

[0004] The utility model aims to provide an electronic thread loosening device which is convenient for further optimizing the design of a sewing machine.

[0005] The utility model is achieved in this way:

[0006] An electronic wire loosening device comprises a wire clamp, a power source, and also includes a mounting shaft, a wire loosening push pin, and a wire loosening push plate mounted on the mounting shaft, wherein the wire loosening push plate has a first abutment portion and a second abutment portion spaced apart along the axial direction of the mounting shaft, the wire loosening push pin abuts against the first abutment portion and is driven by the power source, the second abutment portion abuts against one end of a wire loosening auxiliary nail, and the other end of the wire loosening auxiliary nail abuts against the wire loosening nail of the wire clamp.

[0007] In the above-mentioned electronic wire loosening device, the wire loosening top plate includes a first connecting sleeve and a second connecting sleeve arranged at intervals, the first connecting sleeve and the second connecting sleeve are sleeved on the mounting shaft, the first connecting sleeve and the second connecting sleeve are connected by a connecting plate, a first abutting portion is arranged on the first connecting sleeve, and the connecting plate is the second abutting portion.

[0008] In the above-mentioned electronic wire loosening device, a bending plate is provided on the first connecting sleeve, and the bending plate is the first abutting portion.

[0009] In the above-mentioned electronic wire loosening device, the first connecting sleeve, the connecting plate, the second connecting sleeve and the bending plate are an integrated structure.

[0010] In the above-mentioned electronic thread loosening device, the installation shaft is an eccentric swing shaft of the sewing machine itself.

[0011] In the above-mentioned electronic wire loosening device, the power source is an electromagnet, which includes a shell and an iron core. The iron core is connected to one end of the wire loosening top block, the other end of the wire loosening top block is connected to one end of the wire loosening top pin, and the other end of the wire loosening top pin is in contact and connected with the first abutment portion.

[0012] In the above-mentioned electronic wire loosening device, the power source is fixed on the rear cover of the machine head, and the rear cover of the machine head is fixed on the casing.

[0013] In the above-mentioned electronic wire loosening device, the wire loosening push pin is passed through the rear cover of the machine head, and a limiting piece is arranged at one end of the wire loosening push pin close to the wire loosening push block. A reset spring is mounted on the wire loosening push pin, and one end of the reset spring is pressed against the rear cover of the machine head, and the other end is pressed against the limiting piece to drive the wire loosening push pin and the iron core to reset.

[0014] In the above-mentioned electronic wire loosening device, a connecting groove is provided on the wire loosening top block, and a mounting head is provided on the wire loosening top pin, and the mounting head is arranged in the connecting groove.

[0015] In the above-mentioned electronic wire loosening device, a wire loosening electromagnet cover is arranged on the rear cover of the machine head, and a heat dissipation hole is arranged on the wire loosening electromagnet cover.

[0016] The outstanding advantages of the utility model compared with the prior art are:

[0017] 1. The utility model arranges the thread loosening top plate, and arranges the axes of the thread loosening top pin and the thread loosening auxiliary nail at intervals along the axis direction of the installation shaft, so as to adjust the installation position of the electromagnet and reserve space, which is convenient for further optimization design of the sewing machine, such as the reserved space is used to install the rear tug device, etc.

[0018] 2. The installation shaft of the utility model is an eccentric swing shaft of the sewing machine itself, so there is no need to set up an additional installation shaft, which simplifies the structure and reduces the cost;

[0019] 3. The utility model has a movably connected wire loosening ejector pin and a wire loosening ejector block, which prevents the electromagnet from getting stuck during its extension and retraction, thereby improving product quality. Description of the drawings:

[0020] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0021] Figure 2 It is one of the schematic diagrams of the utility model installed on the casing;

[0022] Figure 3 This is the second schematic diagram of the utility model installed on the casing;

[0023] Figure 4 It is a top view of the utility model installed on the casing;

[0024] Figure 5 yes Figure 4 AA section view;

[0025] Figure 6 yes Figure 4 BB cross-sectional view;

[0026] Figure 7 It is an explosion schematic diagram of the utility model;

[0027] Figure 8 It is a schematic diagram of the loose wire top block of the utility model;

[0028] Fig. 9 It is a schematic diagram of the wire loosening top plate of the utility model.

[0029] In the figure: 1. wire clamp; 2. electromagnet; 3. mounting shaft; 4. wire loosening top plate; 5. wire loosening top pin; 6. wire loosening auxiliary nail; 7. wire loosening nail; 8. first connecting sleeve; 9. second connecting sleeve; 10. connecting plate; 11. bending plate; 12. shaft sleeve; 13. casing; 14. iron core; 15. wire loosening top block; 16. rear cover of machine head; 17. limiter; 18. reset spring; 19. sealing ring; 20. connecting groove; 21. wire loosening electromagnet cover; 22. heat dissipation hole. Specific implementation method:

[0030] The present invention is further described below with specific embodiments:

[0031] like Figure 1-9As shown, the utility model provides an electronic wire loosening device, which includes a wire clamp 1 and a power source. The power source can be an electromagnet 2, a cylinder, etc. In this embodiment, the electromagnet 2 is used as the power source. In addition, the electronic wire loosening device of the utility model also includes a mounting shaft 3 and a wire loosening top plate 4 sleeved on the mounting shaft 3, and the wire loosening top plate 4 has a first abutment portion and a second abutment portion spaced apart along the axial direction of the mounting shaft 3, the wire loosening top plate 4 has a first abutment portion and a second abutment portion spaced apart along the axial direction of the mounting shaft 3, the wire loosening top pin 5 abuts against the first abutment portion and is driven by the power source, the second abutment portion abuts against one end of the wire loosening auxiliary nail 6, and the other end of the wire loosening auxiliary nail 6 abuts against the wire loosening nail 7 of the wire clamp 1.

[0032] The utility model realizes that the axes of the thread loosening top pin 5 and the thread loosening auxiliary nail 6 are not colinear, so it is convenient to adjust the installation position of the power source to free up space for installing the rear tugwheel assembly or other sewing machine matching components, which is convenient for further optimization design of the sewing machine.

[0033] like Figure 1 , Figure 2 , Figure 7 and Fig. 9 As shown, the loose wire top plate 4 includes a first connecting sleeve 8 and a second connecting sleeve 9 which are arranged at intervals. The first connecting sleeve 8 and the second connecting sleeve 9 are sleeved on the mounting shaft 3. The first connecting sleeve 8 and the second connecting sleeve 9 are connected by a connecting plate 10. A first abutting portion is arranged on the first connecting sleeve 8, and the connecting plate 10 is a second abutting portion.

[0034] Further, if Fig. 9 As shown, a bending plate 11 is provided on the first connecting sleeve 8, and the bending plate 11 is a first abutting portion.

[0035] Generally speaking, the first connecting sleeve 8, the connecting plate 10, the second connecting sleeve 9 and the bending plate 11 are an integrated structure.

[0036] The first abutment portion and the second abutment portion of the utility model are located at two parts of the wire loosening top plate 4, so that the action areas of the wire loosening top pin 5 and the wire loosening auxiliary nail 6 are enlarged, so the wire loosening top plate 4 plays a role of a transfer.

[0037] It should be noted that if Figure 1 , Figure 2 , Figure 5-Figure 7 As shown, the installation shaft 3 is the eccentric swing shaft of the sewing machine itself. In this way, there is no need to set up the installation shaft 3 additionally, simplifying the structure and reducing the cost. Since the eccentric swing shaft is rotatably set on the housing 13 through the shaft sleeve 12. Therefore, the apertures of the first connecting sleeve 8 and the second connecting sleeve 9 of the utility model are set to match the eccentric swing shaft and the shaft sleeve 12. The first connecting sleeve 8 is sleeved on the eccentric swing shaft, and the second connecting sleeve 9 is sleeved on the shaft sleeve 12.

[0038] Specifically, if Figure 5 and Figure 7 As shown, the power source is an electromagnet 2, which includes a housing and an iron core 14, and the iron core 14 is connected to one end of a loose wire top block 15, and the connection method can be threaded connection, key connection, etc. The other end of the loose wire top block 15 is connected to a loose wire top pin 5.

[0039] It should be noted that if Figure 1-Figure 7 As shown, the power source of the utility model is fixed on the machine head rear cover 16, and the machine head rear cover 16 is fixed on the casing 13.

[0040] like Figure 7 As shown, the wire loosening pin 5 of the utility model is passed through the rear cover 16 of the machine head, and a limiting member 17 is arranged at one end of the wire loosening pin 5 close to the wire loosening block 15. The limiting member 17 can be a retaining ring or a retaining spring, and a reset spring 18 is sleeved on the wire loosening pin 5. One end of the reset spring 18 is mounted on the rear cover 16 of the machine head, and the other end is mounted on the limiting member 17 to drive the wire loosening pin 5 and the iron core 14 to reset.

[0041] When the electromagnet 2 is energized and the iron core 14 extends outward, the wire loosening pin 5 is driven by the wire loosening top block 15 to act on the first abutment portion of the wire loosening top plate 4, so that the wire loosening top plate 4 rotates around the mounting shaft 3, and the second abutment portion acts on the wire loosening auxiliary nail 6 to move toward the side where the wire loosening nail 6 is located, so that the wire loosening piece of the wire clamp 1 is loosened to achieve the purpose of loosening the wire.

[0042] The electromagnet 2 is powered off, the reset spring 18 drives the wire loosening ejector pin 5 and the iron core 14 to reset, and the wire loosening nail 6 of the wire clamp 1 resets to drive the wire loosening ejector plate 4 to reset.

[0043] In order to prevent the oil in the housing 13 from entering the electromagnet 2 , the utility model provides a sealing ring 19 between the machine head rear cover 16 and the wire loosening ejector pin 5 .

[0044] In addition, if Figure 7 and Figure 8 As shown, the utility model is provided with a connection groove 20 on the loose wire top block 15, and the loose wire top pin 5 is provided with an installation head, which is arranged in the connection groove 20. In this way, the loose wire top block 15 and the loose wire top pin 5 can be kept connected, but the two are movably connected to prevent jamming.

[0045] like Figure 3 As shown, in order to protect the electromagnet 2, the utility model is provided with a loosening electromagnet cover 21 on the head rear cover 16, and a heat dissipation hole 22 is provided on the loosening electromagnet cover 21 to improve the heat dissipation effect and extend the service life of the electromagnet 2.

[0046] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An electronic wire loosening device, comprising a wire clamp (1) and a power source, characterized in that: The utility model also comprises a mounting shaft (3), a wire loosening push pin (5) and a wire loosening push plate (4) sleeved on the mounting shaft (3); the wire loosening push plate (4) has a first abutting portion and a second abutting portion arranged at intervals along the axial direction of the mounting shaft (3); the wire loosening push pin (5) abuts against the first abutting portion and is driven by a power source; the second abutting portion abuts against one end of a wire loosening auxiliary nail (6); and the other end of the wire loosening auxiliary nail (6) abuts against a wire loosening nail (7) of the wire clamp (1).

2. The electronic wire loosening device according to claim 1, characterized in that: The line loosening top plate (4) comprises a first connecting sleeve (8) and a second connecting sleeve (9) which are arranged at intervals. The first connecting sleeve (8) and the second connecting sleeve (9) are sleeved on the mounting shaft (3). The first connecting sleeve (8) and the second connecting sleeve (9) are connected via a connecting plate (10). A first abutting portion is arranged on the first connecting sleeve (8), and the connecting plate (10) is a second abutting portion.

3. The electronic wire loosening device according to claim 2, characterized in that: The first connecting sleeve (8) is provided with a bending plate (11), and the bending plate (11) is a first abutting portion.

4. The electronic wire loosening device according to claim 3, characterized in that: The first connecting sleeve (8), the connecting plate (10), the second connecting sleeve (9) and the bending plate (11) are an integrated structure.

5. An electronic wire loosening device according to any one of claims 1 to 4, characterized in that: The installation shaft (3) is an eccentric swing shaft of the sewing machine itself.

6. The electronic wire loosening device according to claim 1, characterized in that: The power source is an electromagnet (2), which comprises a shell and an iron core (14), the iron core (14) is connected to one end of a wire loosening top block (15), the other end of the wire loosening top block (15) is connected to one end of a wire loosening top pin (5), and the other end of the wire loosening top pin (5) is in contact with and connected to the first abutting portion.

7. The electronic wire loosening device according to claim 6, characterized in that: The power source is fixed on the machine head rear cover (16), and the machine head rear cover (16) is fixed on the machine casing (13).

8. The electronic wire loosening device according to claim 7, characterized in that: The wire loosening ejector pin (5) is inserted into the machine head rear cover (16), a limiting member (17) is arranged at one end of the wire loosening ejector pin (5) close to the wire loosening ejector block (15), a reset spring (18) is sleeved on the wire loosening ejector pin (5), one end of the reset spring (18) is mounted on the machine head rear cover (16), and the other end of the reset spring (18) is mounted on the limiting member (17) to drive the wire loosening ejector pin (5) and the iron core (14) to reset.

9. The electronic wire loosening device according to claim 8, characterized in that: The wire loosening top block (15) is provided with a connecting groove (20), and the wire loosening top pin (5) is provided with a mounting head, which is arranged in the connecting groove (20).

10. The electronic wire loosening device according to claim 7, characterized in that: The machine head rear cover (16) is provided with a wire loosening electromagnet cover (21), and the wire loosening electromagnet cover (21) is provided with a heat dissipation hole (22).

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