A sewing device with quick-change needle

Abstract

The utility model relates to sewing machine technical field discloses a sewing device with needle head capable of being replaced quickly, which comprises a sewing machine body and a needle clamp arranged at a sewing position of the sewing machine body, and further comprises: a sewing needle mounted at the bottom of the needle clamp; a screw threadedly connected to the surface of the needle clamp, wherein one end of the screw is provided with a cross groove; a rotating disc arranged on the surface of the needle clamp, wherein the surface of the rotating disc is fixedly connected with a fixed block, and one side of the fixed block is hingedly connected with a fixed tube; the utility model is provided with a quick replacement structure, which does not need external tools, and only needs to cooperate the cross block with the cross groove of the screw through a knob, and the spring elasticity is used to realize quick tightening or loosening, thereby solving the problem of relying on tools for traditional replacement, greatly improving the replacement efficiency, and ensuring the stable rotation of the knob and avoiding disengagement through the rotating disc, and the structure stability and operation convenience are improved through the clamping and fixed connecting rod.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a sewing device with a quick-change needle. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to create one or more stitches on fabric, allowing one or more layers of fabric to interweave or sew together. Sewing machines can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, as well as products made of leather, plastic, and paper. The stitches produced are neat, beautiful, flat, and strong. Sewing machines are fast and easy to use. However, the needle is a consumable part that is easily damaged and often needs to be replaced. Traditional methods of replacing sewing machine needles usually require the use of external tools such as screwdrivers to tighten the fixing screws. During the tightening process, one hand must hold the wrench and apply force to the screw head. This operation method makes needle replacement inconvenient and greatly affects the efficiency of the operator and the sewing machine. Utility Model Content

[0003] The purpose of this invention is to provide a sewing device with a quick-change needle to solve the problems existing in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a sewing device with a quick-change needle, comprising a sewing machine body and a needle clamp disposed at its sewing position, and further comprising:

[0005] A sewing needle installed at the bottom of the needle holder;

[0006] A screw threaded onto the surface of the needle clamp, one end of which has a cross groove;

[0007] A turntable is provided on the surface of the needle clamp. A fixing block is fixedly connected to the surface of the turntable. A fixing tube is hinged to one side of the fixing block. A connecting rod is slidably connected inside the fixing tube. A spring is fixed between the inner wall of the fixing tube and one end of the connecting rod.

[0008] A knob is fixedly connected to the other end of the connecting rod, and a cross block that mates with the cross groove is fixedly connected to the surface of the knob.

[0009] Preferably, the needle clamp has a rotating groove inside, and a rotating block is fixedly connected to one side of the turntable, with the rotating block being movably connected to the inside of the rotating groove.

[0010] Preferably, a fixing plate is fixedly connected to the surface of the needle clamp, and a gripper is fixedly connected to one end of the fixing plate. The gripper is used in conjunction with the connecting rod.

[0011] Preferably, the fixed tube has a groove inside, and the connecting rod has a slider fixedly connected to its surface, with the slider and the groove being slidably connected.

[0012] Preferably, the inner diameter of the gripper is larger than the diameter of the connecting rod, and a rubber pad is provided on the inner side of the gripper.

[0013] Preferably, the size of the cross block is adapted to the size of the cross groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention, through its quick-change structure, eliminates the need for external tools. Simply turn the knob to engage the cross block with the cross slot of the screw, utilizing the elasticity of the spring to quickly tighten or loosen it. This solves the problem of traditional tool-dependent replacements, significantly improving replacement efficiency. At the same time, the turntable ensures stable knob rotation and prevents it from coming loose, and the gripper can fix the connecting rod to prevent the parts from shaking when not in operation, thus improving structural stability and ease of operation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a partial three-dimensional structural diagram of the present invention;

[0019] Figure 4 This is a three-dimensional structural diagram of the turntable and the fixing tube cut apart in this utility model;

[0020] Figure 5 In this utility model Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0021] Figure 6 In this utility model Figure 3 A magnified schematic diagram of the local structure at point B;

[0022] Figure 7 In this utility model Figure 4 A magnified schematic diagram of the structure at point C.

[0023] In the diagram: 1. Sewing machine body; 2. Needle holder; 3. Sewing needle; 4. Turntable; 5. Rotary groove; 6. Rotating block; 7. Screw; 8. Cross groove; 9. Fixing block; 10. Fixing tube; 11. Connecting rod; 12. Slide groove; 13. Slider; 14. Spring; 15. Knob; 16. Cross block; 17. Fixing plate; 18. Grip clamp. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-7 As shown, a sewing device with quick-change needles includes a sewing machine body 1 and a needle clip 2 located at its sewing position. A fixing plate 17 is fixedly connected to the surface of the needle clip 2, and a gripper 18 is fixedly connected to one end of the fixing plate 17. The gripper 18 works in conjunction with a connecting rod 11, thus facilitating the fixation of the connecting rod 11 in a non-operating state. The inner diameter of the gripper 18 is larger than the diameter of the connecting rod 11, and a rubber pad is provided on the inner side of the gripper 18 to prevent the connecting rod 11 and other components from shaking freely. A sewing needle 3 is installed at the bottom of the needle clip 2, and the surface of the needle clip 2 is threaded. There is a screw 7, one end of which has a cross groove 8. The surface of the needle clip 2 is provided with a turntable 4. A fixing block 9 is fixedly connected to the surface of the turntable 4. A fixing tube 10 is hinged to one side of the fixing block 9. A connecting rod 11 is slidably connected inside the fixing tube 10. A spring 14 is fixed between the inner wall of the fixing tube 10 and one end of the connecting rod 11. A knob 15 is fixedly connected to the other end of the connecting rod 11. A cross block 16 that works with the cross groove 8 is fixedly connected to the surface of the knob 15. The size of the cross block 16 matches the size of the cross groove 8, so that they can be quickly aligned for assembly and disassembly, making the operation convenient.

[0026] The needle holder 2 has a rotating groove 5 inside, and a rotating block 6 is fixedly connected to one side of the turntable 4. The rotating block 6 is movably connected to the inside of the rotating groove 5, so that the turntable 4 can rotate stably on the surface of the needle holder 2, providing convenience for quick assembly and disassembly of the sewing needle 3.

[0027] The fixed tube 10 has a groove 12 inside, and a slider 13 is fixedly connected to the surface of the connecting rod 11. The slider 13 is slidably connected to the groove 12. This not only restricts the movement direction of the connecting rod 11, but also prevents the connecting rod 11 from deviating during the extension and retraction process, thus improving the stability during sliding.

[0028] It is worth noting that the technical features of the sewing machine body 1 proposed in this technical solution should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be selected using conventional methods in this field. This technical solution will not elaborate further.

[0029] Working principle: When changing the needle, first remove the connecting rod 11 from the gripper 18, and pull the knob 15 to rotate the connecting rod 11, which in turn rotates the fixing tube 10 around the fixing block 9. Then, push the knob 15 to compress the spring 14, which allows the slider 13 to slide within the groove 12, aligning the cross block 16 with the cross groove 8 of the screw 7. When the cross groove 8 and the cross block 16 engage, rotate the knob 15, which in turn rotates the connecting rod 11, the fixing tube 10, the fixing block 9, and... The turntable 4 rotates, and at the same time, the rotating block 6 inside the turntable 4 rotates in the rotating groove 5 inside the needle clamp 2. This assists the knob 15 in rotating and improves the stability during rotation. Then, the screw 7 can be loosened, the old sewing needle 3 can be removed and a new sewing needle 3 can be installed. The knob 15 is rotated in the opposite direction to tighten the screw 7, and the hand is released. With the help of the spring 14, the cross block 16 is disengaged from the cross groove 8. The knob 15 is then pulled to make the connecting rod 11 snap back into the gripper 18 to complete the fixation. This completes the quick replacement of the needle.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sewing device with a quick-change needle, comprising a sewing machine body (1) and a needle clip (2) disposed thereon at the sewing position, characterized in that, Also includes: A sewing needle (3) is installed at the bottom of the needle holder (2); A screw (7) is threaded onto the surface of the needle clamp (2), and one end of the screw (7) has a cross groove (8); A turntable (4) is provided on the surface of the needle clamp (2). A fixing block (9) is fixedly connected to the surface of the turntable (4). A fixing tube (10) is hinged to one side of the fixing block (9). A connecting rod (11) is slidably connected inside the fixing tube (10). A spring (14) is fixed between the inner wall of the fixing tube (10) and one end of the connecting rod (11). A knob (15) is fixedly connected to the other end of the connecting rod (11), and a cross block (16) that mates with the cross groove (8) is fixedly connected to the surface of the knob (15).

2. The sewing device with a quick-change needle according to claim 1, characterized in that: The needle clamp (2) has a rotating groove (5) inside, and a rotating block (6) is fixedly connected to one side of the turntable (4). The rotating block (6) is movably connected to the inside of the rotating groove (5).

3. The sewing device with a quick-change needle according to claim 1, characterized in that: A fixing plate (17) is fixedly connected to the surface of the needle clamp (2), and a gripper (18) is fixedly connected to one end of the fixing plate (17). The gripper (18) is used in conjunction with the connecting rod (11).

4. The sewing device with a quick-change needle according to claim 1, characterized in that: The fixed tube (10) has a groove (12) inside, and a slider (13) is fixedly connected to the surface of the connecting rod (11). The slider (13) is slidably connected to the groove (12).

5. A sewing device with a quick-change needle tip according to claim 3, characterized in that: The inner diameter of the gripper (18) is larger than the diameter of the connecting rod (11), and a rubber pad is provided on the inner side of the gripper (18).

6. A sewing device with a quick-change needle tip according to claim 1, characterized in that: The dimensions of the cross block (16) are adapted to the dimensions of the cross groove (8).

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