Electronic thread trapper for sewing machine

Abstract

The utility model discloses an electronic thread trapper for a sewing machine, which relates to the field of sewing machine components, solves the problem of weak magnetic attraction force caused by direct attraction of an existing electromagnetic coil seat, and adopts the following scheme that the electronic thread trapper comprises a lower seat component and an upper seat component assembled on the top side of the lower seat component, a spiral cylinder is fixedly installed at the bottom of the inner side of the shell, an electromagnetic coil seat is sleeved with an inner cavity of the shell, the input end of the electromagnetic coil seat is electrically connected with a wire, a spacer ring is arranged between the top side of the electromagnetic coil seat and the upper seat assembly in a cushioned mode, and sewing machine threads are clamped between the upper supporting plate and the lower supporting plate; according to the electronic thread trapper for the sewing machine, the distance ring is arranged between the lower base assembly and the upper base assembly, the magnetic circuit of the coil can be increased through the distance ring, the efficiency and the stability of an electric appliance are improved, and due to the fact that iron has good magnetic permeability, magnetic field lines can be attracted, and the magnetic flux in the coil is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine component technology, specifically to an electronic thread clamp for sewing machines. Background Technology

[0002] Electronic thread tensioners are an important component of sewing equipment. They typically adjust the clamping force of the thread tensioner by adjusting the voltage on the thread tensioning electromagnet, thereby regulating and controlling the thread tension.

[0003] A search revealed that patent application number 202321721107.6 discloses an electronic thread clamp for a sewing machine, comprising a housing, an electromagnet coil, an iron core, a clamping plate, and a fixing plate. The fixing plate is fixed to the housing, and the iron core is fixed to the clamping plate and passes through the electromagnet coil inside the housing. A return spring is provided inside the housing to drive the clamping plate to move upward. A limit screw passes through the clamping plate, and the end of the limit screw is connected to the fixing plate. An auxiliary spring is provided between the clamping plate and the fixing plate to connect the two. The auxiliary spring is sleeved on the limit screw. The center of the return spring is located on the side of the clamping plate away from the housing. The additional auxiliary spring, located on the side of the clamping plate away from the housing, can play a corresponding balancing role, so that one side of the clamping plate is reset under the action of the return spring, and the other side is reset under the action of the auxiliary spring, making the clamping plate more evenly stressed and the movement and reset of the clamping plate more stable.

[0004] The aforementioned application documents increase reset stability by setting a second set of reset springs, but the upper and lower housings are still assembled in a set-top box, which limits stability and may result in detachment. Secondly, the magnetic attraction force is limited by the direct adsorption of the electromagnetic coil.

[0005] Therefore, we propose an electronic thread clamp for sewing machines. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides an electronic thread clamp for sewing machines, which solves the problem of weak magnetic attraction when directly adsorbed by existing electromagnetic coil holders.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: an electronic thread clamp for a sewing machine, comprising a lower seat assembly and an upper seat assembly mounted on its top side, the main body of the lower seat assembly being a housing, a screw cylinder being fixedly installed at the bottom of the inner side of the housing, an electromagnetic coil seat being fitted inside the inner cavity of the housing, an input terminal of the electromagnetic coil seat being electrically connected to a wire, and a spacer ring being installed between the top side of the electromagnetic coil seat and the upper seat assembly;

[0008] The main body of the upper seat assembly is a shell plate. The outer side of the shell plate and the shell is provided with an upper support plate and the shell in an opposite vertical position, and a sewing machine thread is clamped between the upper support plate and the lower support plate.

[0009] The bottom of the upper assembly is fixedly installed with an iron core column, and a stud is slidably fitted on the inner side of the iron core column. The stud is threadedly fitted on the inner side of the screw cylinder, and a first return spring located on the outer side of the stud is provided between the upper assembly and the screw cylinder.

[0010] As a preferred embodiment of this utility model, the inner side of the iron core column is provided with a slot with a radius of 1.5 times that of the stud, and a chuck that matches the specifications of the slot is fixedly installed on the top of the stud.

[0011] The slot and chuck design facilitates the sliding of the studs up and down inside the iron core column, thereby enabling the upper assembly to be threaded onto the top side of the lower assembly, ensuring the connection effect and the stability of the entire device.

[0012] As a preferred embodiment of this utility model, a through hole communicating with the slot is provided at the center of the shell plate, and a rotating groove adapted to the specifications of the screwdriver tip is provided on the top surface of the chuck plate.

[0013] The chuck design allows the screwdriver to pass through the through-hole drive stud and thread it onto the inside of the screw barrel, ensuring connection stability.

[0014] As a preferred embodiment of this utility model, the edge of the housing is provided with a groove facing downwards, and a wire connected to the electromagnetic coil base is fitted inside the groove. The outer wall of the spacer ring is also provided with an end clip that matches the groove. The groove ensures the stability of the fitting.

[0015] As a preferred embodiment of this utility model, the upper support plate and the lower support plate are provided with nail holes that are positioned opposite each other, a retaining nail is fitted between the upper and lower nail holes, and a second return spring is provided on the outside of the retaining nail between the upper support plate and the lower support plate.

[0016] The inclusion of a locking pin and a second reset spring further ensures the reset effect and increases practicality.

[0017] As a preferred embodiment of this utility model, four sets of blocks are fixedly installed at the edge of the upper support plate and snapped onto the bottom side of the lower support plate.

[0018] This invention provides an electronic thread clamp for sewing machines. It has the following advantages:

[0019] 1. This electronic thread clamp for sewing machines, through the setting of a spacer ring between the lower and upper components, can increase the magnetic circuit of the coil, improve the efficiency and stability of the electrical appliance. Since iron has excellent magnetic permeability, it can attract magnetic field lines, thereby enhancing the magnetic flux inside the coil, increasing the inductance value, and improving the stability and performance of the entire circuit. 2. This electronic thread clamp for sewing machines, through the connection structure between the stud and the iron core column, allows for threading from the top using a screwdriver, ensuring a good connection. It also ensures threading even when the threaded connection is sliding up and down under magnetic attraction, solving the problem of low stability in existing threaded connections. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the inner structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the lower seat assembly of this utility model;

[0023] Figure 4 This is a schematic diagram of the upper seat assembly of this utility model;

[0024] Figure 5 This is a schematic diagram of the inner structure of the upper seat assembly of this utility model.

[0025] In the diagram: 1. Lower seat assembly; 11. Housing; 12. Lower support plate; 13. Screw barrel; 14. Groove; 2. Upper seat assembly; 21. Shell plate; 22. Iron core column; 23. Screw; 24. Stop block; 25. Upper support plate; 26. Perforation; 27. Slot; 28. Chuck; 29. ​​Rotary groove; 3. Spacer ring; 4. Electromagnetic coil seat; 5. Wire; 6. Clip; 7. Second return spring; 8. First return spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5This utility model provides a technical solution: an electronic thread clamp for a sewing machine, comprising a lower seat assembly 1 and an upper seat assembly 2 mounted on its top side. The main body of the lower seat assembly 1 is a housing 11, with a screw cylinder 13 fixedly installed at the bottom of the inner side of the housing 11. An electromagnetic coil seat 4 is fitted inside the cavity of the housing 11, and the input end of the electromagnetic coil seat 4 is electrically connected to a wire 5. A spacer ring 3 is installed between the top side of the electromagnetic coil seat 4 and the upper seat assembly 2. The main body of the upper seat assembly 2 is a shell plate 21. An upper support plate 25 and the housing 11 are arranged on the outer side of the shell plate 21 and the housing 11, with the upper support plate 25 and the lower support plate 12 clamping the sewing machine thread. An iron core column 22 is fixedly installed at the bottom of the upper seat assembly 2. A stud 23 is slidably fitted inside the iron core column 22. The stud 23 is threaded inside the screw cylinder 13, and a first return spring 8 located outside the stud 23 is provided between the upper seat assembly 2 and the screw cylinder 13.

[0028] The electronic thread clamp for sewing machines, through the setting of the spacer ring 3 between the lower seat assembly 1 and the upper seat assembly 2, can increase the magnetic circuit of the coil by using the spacer ring 3, thereby improving the efficiency and stability of the electrical appliance. Since iron has good magnetic permeability, it can attract magnetic field lines, thereby enhancing the magnetic flux inside the coil, increasing the inductance value, and improving the stability and performance of the entire circuit.

[0029] Example 2:

[0030] The inner side of the iron core column 22 is provided with a slot 27 with a radius of 1.5 times that of the stud 23, and a chuck 28 that matches the specifications of the slot 27 is fixedly installed on the top of the stud 23. The slot 27 and the chuck 28 facilitate the stud 23 to slide up and down on the inner side of the iron core column 22, so that the upper seat assembly 2 can be threaded onto the top side of the lower seat assembly 1 by the stud 23, ensuring the connection effect and the stability of the entire device.

[0031] The center of the housing 21 has a through hole 26 that communicates with the slot 27, and the top surface of the chuck 28 has a rotating groove 29 that matches the size of the screwdriver tip. The chuck 28 is designed so that the screwdriver can pass through the through hole 26 to drive the stud 23 to be threaded onto the inside of the screw barrel 13, thus ensuring the stability of the connection.

[0032] The edge of the housing 11 has a downward groove 14. The inner side of the groove 14 is fitted with a wire 5 that is connected to the electromagnetic coil base 4, and the outer wall of the spacer ring 3 is also provided with an end clip that matches the groove 14. The groove 14 is provided to ensure its fitting stability.

[0033] The upper support plate 25 and the lower support plate 12 have nail holes that are positioned opposite each other. A retaining nail 6 is fitted between the upper and lower nail holes, and a second return spring 7 is provided on the outside of the retaining nail 6 between the upper support plate 25 and the lower support plate 12. The retaining nail 6 and the second return spring 7 can further ensure the reset effect and increase the practicality.

[0034] Four sets of blocks 24 are fixedly installed at the edge of the upper support plate 25 and are snapped onto the bottom side of the lower support plate 12.

[0035] This electronic thread clamp for sewing machines, through the connection structure between the stud 23 and the iron core column 22, allows for threading from the top using a screwdriver, ensuring a good connection. It also allows for threading even when the thread clamp slides up and down under magnetic attraction, thus solving the problem of low stability in existing threaded connections.

[0036] The working principle and usage process of this utility model are as follows: When the device needs to work, the electromagnetic coil seat 4 is placed inside the lower seat assembly 1, and then the spacer ring 3 is installed on the top of the electromagnetic coil seat 4 inside the lower seat assembly 1. Finally, the upper seat assembly 2 is placed on the top side of the lower seat assembly 1. Finally, the screwdriver is passed through the through hole 26 to thread the stud 23 into the screw cylinder 13, thereby achieving the threaded fit and ensuring the stability of the device. The setting of the spacer ring 3 can increase the magnetic circuit of the coil, improve the efficiency and stability of the electrical appliance. Since iron has good magnetic permeability, it can attract magnetic field lines, which can enhance the magnetic flux inside the coil, thereby increasing the inductance value and improving the stability and performance of the entire circuit.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electronic thread clamp for a sewing machine, characterized in that: The assembly includes a lower seat assembly (1) and an upper seat assembly (2) mounted on its top side. The main body of the lower seat assembly (1) is a housing (11). A screw cylinder (13) is fixedly installed at the bottom of the inner side of the housing (11). An electromagnetic coil seat (4) is fitted inside the inner cavity of the housing (11). The input end of the electromagnetic coil seat (4) is electrically connected to a wire (5). A spacer ring (3) is installed between the top side of the electromagnetic coil seat (4) and the upper seat assembly (2). The main body of the upper seat assembly (2) is a shell plate (21). An upper support plate (25) and a housing (11) with opposite vertical positions are provided on the outer side of the shell plate (21) and the housing (11). A sewing machine thread is sandwiched between the upper support plate (25) and the lower support plate (12). The bottom of the upper assembly (2) is fixedly installed with an iron core column (22), and a stud (23) is slidably fitted on the inner side of the iron core column (22). The stud (23) is threadedly fitted on the inner side of the screw barrel (13), and a first return spring (8) located on the outer side of the stud (23) is provided between the upper assembly (2) and the screw barrel (13).

2. The electronic thread clamp for a sewing machine according to claim 1, characterized in that: The inner side of the iron core post (22) is provided with a slot (27) with a radius of 1.5 times that of the stud (23), and the top of the stud (23) is fixedly installed with a chuck (28) that matches the specifications of the slot (27).

3. The electronic thread clamp for a sewing machine according to claim 2, characterized in that: The center of the chuck (21) is provided with a through hole (26) that communicates with the slot (27), and the top surface of the chuck (28) is provided with a rotating groove (29) that is compatible with the specifications of the screwdriver tip.

4. An electronic thread clamp for a sewing machine according to claim 1, characterized in that: The edge of the housing (11) has a groove (14) that is opened downward. The inner side of the groove (14) is fitted with a wire (5) that is connected to the electromagnetic coil seat (4), and the outer wall of the spacer (3) is also provided with an end clip that is compatible with the groove (14).

5. An electronic thread clamp for a sewing machine according to claim 1, characterized in that: The upper support plate (25) and the lower support plate (12) are provided with nail holes in opposite positions. A retaining pin (6) is fitted between the upper and lower nail holes, and a second return spring (7) is provided on the outside of the retaining pin (6) between the upper support plate (25) and the lower support plate (12).

6. An electronic thread clamp for a sewing machine according to claim 1, characterized in that: Four sets of blocks (24) are fixedly installed on the edge of the upper support plate (25) and are snapped onto the bottom side of the lower support plate (12).

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