A plug-in reverse sewing handle of a sewing machine

Abstract

The utility model discloses a plug -in type reverse sewing wrench of sewing machine, including wrench upper cover subassembly, the wrench upper cover subassembly includes plastic handle and wrench support, set up plug -in card slot and bayonet on the wrench support, the side of wrench support is equipped with square plate, the first bolt is passed through inside wrench support and square plate, the outside of first bolt is sleeved main nut, the surface of plastic handle is passed through second bolt. This one kind of plug -in type reverse sewing wrench of sewing machine, through including plastic handle and wrench support in wrench upper cover subassembly, when using this reverse sewing wrench, push the wrench support horizontally, make the end of axle position screw slide into the plug -in card slot of former section, then press down the wrench support, until the end of the second axle position screw and the elastic sheet of the lower section plug -in card slot, complete installation, when disassembling, the user directly lifts up the wrench upper cover subassembly, the elastic sheet is pressed and deformed and comes out from the bayonet, can take out the subassembly, make its dismounting installation more convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewing machine parts, and in particular relates to a plug-in type reverse sewing wrench for sewing machines. Background Technology

[0002] The backstitch function of a sewing machine is used to reinforce the beginning and end of the thread. Currently, most common backstitch wrenches are swing type or knob type.

[0003] The following problems exist with the current rewinding wrenches on the market: Traditional rewinding wrenches require a large operating space when in use, which may be obstructed when sewing complex parts or in narrow spaces. Traditional mechanisms often rely on complex linkage and spring systems, which are prone to wear, jamming or inaccurate reset after long-term use. The gear position is not clear, and it is difficult for users to confirm whether they have successfully switched to the rewinding state by touch. In addition, the connection between the wrench and the machine body is usually integrated or cannot be quickly disassembled, which is inconvenient for maintenance and replacement. Utility Model Content

[0004] The purpose of this utility model is to provide a plug-in rewinding wrench for a sewing machine to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows: A plug-in type backstitching wrench for a sewing machine includes a wrench cover assembly, the wrench cover assembly includes a plastic handle and a wrench bracket, the wrench bracket has a plug-in slot and a locking opening, the side of the wrench bracket is provided with a square plate, a first bolt passes through the wrench bracket and the square plate, a main nut is sleeved on the outside of the first bolt, and a second bolt passes through the surface of the plastic handle.

[0006] Preferably, the side of the plastic handle is provided with a fixing seam assembly, which includes a housing fixing plate. A first small screw is embedded in the surface of the housing fixing plate, a third bolt is embedded in the surface of the housing fixing plate, and a second small screw is embedded in the surface of the housing fixing plate. A rotating shaft is fixedly connected to the surface of the fixing seam assembly. A connecting rod is sleeved inside the rotating shaft, and double nuts are sleeved outside the connecting rod. A shaft screw is provided on the surface of the housing fixing plate, a tension spring is provided on the surface of the housing fixing plate, and a spring sheet is fixedly connected to the surface of the housing fixing plate.

[0007] Preferably, the wrench cover assembly engages with the shaft screw via its insertion slot, and the wrench cover assembly is mounted on the fixed groove assembly.

[0008] Preferably, a Hall circuit board is fixedly connected to the surface of the housing fixing plate.

[0009] Preferably, the connecting rod is provided with a limiting groove, and the housing fixing plate is provided with a limiting shaft.

[0010] Preferably, one end of the tension spring is provided with a main screw.

[0011] Preferably, the spring is a metal spring, and the spring is fixed to the housing mounting plate by screws.

[0012] This utility model discloses a plug-in type reverse sewing wrench for sewing machines, which has the following advantages: The plug-in type reverse sewing wrench for sewing machines includes a plastic handle and a wrench bracket in the wrench upper cover assembly. The wrench bracket has a plug-in slot and a locking hole. A square plate is added to the side of the wrench bracket. A first bolt passes through the wrench bracket and the square plate, and a main nut is sleeved on the outside of the first bolt. A second bolt passes through the surface of the plastic handle. When using the reverse sewing wrench, the wrench bracket is pushed horizontally, causing the end of the shaft screw to slide into the front plug-in slot. Then, the wrench bracket is pressed down until the lower plug-in slot engages with the second shaft screw, and the end of the spring clip clicks into the locking hole, completing the installation. For disassembly, the user simply lifts the wrench upper cover assembly upwards. The spring clip deforms under pressure and disengages from the locking hole, allowing the assembly to be pulled out, making disassembly and installation more convenient. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the wrench bracket structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the linkage structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the spring sheet structure of this utility model.

[0018] The markings in the diagram are as follows: 1. Plastic handle; 2. Wrench cover assembly; 3. Main nut; 4. Wrench bracket; 5. Square plate; 6. First bolt; 7. Second bolt; 8. Fixing and backing assembly; 9. Housing fixing plate; 10. Connecting rod; 11. Shaft; 12. First small screw; 13. Shaft screw; 14. Spring; 15. Third bolt; 16. Second small screw; 17. Double nut; 18. Hall effect circuit board; 19. Tension spring; 20. Main screw; 21. Magnet. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0020] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0023] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0024] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a pull-out reversing wrench for a sewing machine.

[0025] like Figure 1-4 As shown, this utility model discloses a plug-in type backstitching wrench for a sewing machine, including a wrench cover assembly 2. The wrench cover assembly 2 includes a plastic handle 1 and a wrench bracket 4. The wrench bracket 4 has a plug-in slot and a locking opening. A square plate 5 is provided on the side of the wrench bracket 4. A first bolt 6 passes through the wrench bracket 4 and the square plate 5. A main nut 3 is sleeved on the outside of the first bolt 6. A second bolt 7 passes through the surface of the plastic handle 1. By adding a square plate 5 to the side of the wrench bracket 4 and the plastic handle 1, the wrench cover assembly 2 includes a plastic handle 1 and a wrench bracket 4. The first bolt 6 passes through the inside of the plate 5, and the main nut 3 is sleeved on the outside of the first bolt 6. The second bolt 7 passes through the surface of the plastic handle 1. When using this countersunk wrench, push the wrench bracket 4 horizontally so that the end of the shaft screw 13 slides into the front insertion slot. Then press down the wrench bracket 4 until the lower insertion slot engages with the second shaft screw 13 and the end of the spring piece 14 clicks into the slot, completing the installation. When disassembling, the user simply lifts the wrench cover assembly 2 upwards. The spring piece 14 is deformed by pressure and comes out of the slot, allowing the assembly to be pulled out, making it easier to disassemble and install.

[0026] The plastic handle 1 has a fixed seam assembly 8 on its side. The fixed seam assembly 8 includes a housing mounting plate 9, with a first small screw 12, a third bolt 15, and a second small screw 16 embedded in its surface. A rotating shaft 11 is fixedly connected to the surface of the fixed seam assembly 8. A connecting rod 10 is sleeved inside the rotating shaft 11, and a double nut 17 is sleeved outside the connecting rod 10. A shaft screw 13 is provided on the surface of the housing mounting plate 9, and a tension spring 19 is provided on its surface. A spring piece 14 is fixedly connected to the surface of the housing mounting plate 9. By adding a fixed seam assembly 8 to the side of the plastic handle 1, the fixed seam assembly 8, which includes a housing mounting plate 9, with a first small screw 12 embedded in its surface, a third bolt 15, and a second small screw 16 embedded in its surface, can be achieved. A third bolt 15 is embedded, a second small screw 16 is embedded on the surface of the housing fixing plate 9, a rotating shaft 11 is fixedly connected to the surface of the fixed reverse seam assembly 8, a connecting rod 10 is sleeved inside the rotating shaft 11, and a double nut 17 is sleeved on the outside of the connecting rod 10. A shaft position screw 13 is added to the surface of the housing fixing plate 9, a tension spring 19 is added to the surface of the housing fixing plate 9, and a spring piece 14 is fixedly connected to the surface of the housing fixing plate 9. During operation, under the action of the tension spring 19, the connecting rod 10 is in the initial position, and the mechanism is in the "forward seam" state. When the user presses down the wrench, the wrench bracket 4 pushes the shaft position screw 13, causing the connecting rod 10 to rotate counterclockwise against the tension of the tension spring 19, which drives the magnet 21 to trigger the Hall sensor and switch to the "reverse seam" state. After the wrench is released, the mechanism automatically resets under the action of the tension spring 19.

[0027] The wrench cover assembly 2 engages with the shaft screw 13 through its insertion slot. The wrench cover assembly 2 is installed on the fixed backing assembly 8. By installing the wrench cover assembly 2 on the fixed backing assembly 8, the snap-fit ​​and clamping force between its slot and the spring piece 14 makes it easier to disassemble.

[0028] A Hall circuit board 18 is fixedly connected to the surface of the housing mounting plate 9. The Hall circuit board 18 is used to detect the position of the magnet 21 on the connecting rod 10 by mounting the Hall circuit board 18 on the surface of the housing mounting plate 9.

[0029] The connecting rod 10 is provided with a limiting groove, and the housing fixing plate 9 is provided with a limiting shaft to limit the rotation angle range of the connecting rod 10. By opening a limiting hole on the connecting rod 10 and installing a limiting shaft on the surface of the housing fixing plate 9, the rotation angle range of the connecting rod 10 is limited.

[0030] One end of the tension spring 19 is provided with a main screw 20. By installing the main screw 20 at one end of the tension spring 19, the main screw 20 provides the entire mechanism with a restoring force that tends to the serrated position.

[0031] The spring 14 is a metal spring. The spring 14 is fixed to the housing mounting plate 9 by screws. By setting the spring 14 as a metal spring, its free end is tilted upwards to form an elastic engagement with the bayonet.

[0032] The working principle of the plug-in reverse stitching wrench of this sewing machine is as follows: When using the reverse stitching wrench, push the wrench bracket 4 horizontally so that the end of the shaft screw 13 slides into the front plug-in slot. Then press down the wrench bracket 4 until the lower plug-in slot engages with the second shaft screw 13 and the end of the spring piece 14 clicks into the slot, completing the installation. During operation, under the action of the tension spring 19, the connecting rod 10 is in the initial position, and the mechanism is in the "forward stitching" state. When the user presses down the wrench, the wrench bracket 4 pushes the shaft screw 13, causing the connecting rod 10 to rotate counterclockwise against the tension of the tension spring 19, which drives the magnet 21 to trigger the Hall sensor, thus switching to the "reverse stitching" state. After releasing the wrench, the mechanism automatically resets under the action of the tension spring 19. When disassembly is required after use, the user simply lifts up the wrench cover assembly 2, and the spring piece 14 is deformed by pressure and comes out of the slot, making the assembly easier to remove and install.

[0033] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A plug-in type reverse stitching wrench for a sewing machine, comprising a wrench cover assembly (2), characterized in that: The wrench cover assembly (2) includes a plastic handle (1) and a wrench bracket (4). The wrench bracket (4) has a slot and a latch. A square plate (5) is provided on the side of the wrench bracket (4). A first bolt (6) passes through the inside of the wrench bracket (4) and the square plate (5). A main nut (3) is sleeved on the outside of the first bolt (6). A second bolt (7) passes through the surface of the plastic handle (1).

2. The plug-in type reverse stitching wrench for a sewing machine according to claim 1, characterized in that: The plastic handle (1) has a fixed seam assembly (8) on its side. The fixed seam assembly (8) includes a housing fixing plate (9). A first small screw (12) is embedded on the surface of the housing fixing plate (9). A third bolt (15) is embedded on the surface of the housing fixing plate (9). A second small screw (16) is embedded on the surface of the housing fixing plate (9). A rotating shaft (11) is fixedly connected to the surface of the fixed seam assembly (8). A connecting rod (10) is sleeved inside the rotating shaft (11). A double nut (17) is sleeved outside the connecting rod (10). A shaft screw (13) is provided on the surface of the housing fixing plate (9). A tension spring (19) is provided on the surface of the housing fixing plate (9). A spring piece (14) is fixedly connected to the surface of the housing fixing plate (9).

3. The plug-in type reverse stitching wrench for a sewing machine according to claim 2, characterized in that: The wrench cover assembly (2) is installed on the fixed seam assembly (8) by its insertion slot cooperating with the shaft screw (13).

4. The plug-in type reverse stitching wrench for a sewing machine according to claim 2, characterized in that: The Hall circuit board (18) is fixedly connected to the surface of the housing fixing plate (9).

5. The plug-in type reverse stitching wrench for a sewing machine according to claim 2, characterized in that: The connecting rod (10) is provided with a limiting groove, and the housing fixing plate (9) is provided with a limiting shaft.

6. The plug-in type reverse stitching wrench for a sewing machine according to claim 2, characterized in that: One end of the tension spring (19) is provided with a main screw (20).

7. The plug-in type reverse stitching wrench for a sewing machine according to claim 2, characterized in that: The spring (14) is a metal spring, and the spring (14) is fixed to the housing fixing plate (9) by screws.

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