Electric lift-presser device with manual lift mechanism

Abstract

The application relates to an electric presser foot lifting device with a manual lifting mechanism, which comprises an electric lifting mechanism, a presser foot mechanism and a manual lifting mechanism. The electric lifting mechanism comprises a motor and a transmission assembly driven by the motor. The transmission assembly comprises a rotating shaft, a swing arm connected to the rotating shaft and a pull handle connected to the swing arm. The presser foot mechanism comprises a presser foot rod, a presser foot plate and a lifting member. The presser foot rod is movably connected to a machine body, the presser foot plate is fixed to the presser foot rod, and the lifting member is fixed to the presser foot rod and connected to the pull handle. The manual lifting mechanism comprises a handle, a rod body and a cam. The handle and the cam are connected to two ends of the rod body. The rod body is pivotally arranged on the machine body, and the cam is arranged corresponding to the lifting member. When the handle is manually turned, the lifting member and the presser foot rod can be lifted through the cam. Therefore, the disassembly and assembly process of parts can be omitted, and the labor cost can be greatly saved.

Description

Technical Field

[0001] This application relates to the technical field of a sewing machine, and more particularly to an electric presser foot lifting device with a manual lifting mechanism. Background Technology

[0002] With the advancement of technology, the previous method of lifting the presser foot by pushing the transmission mechanism with the operator's knee has been replaced by a combination of electric motor and transmission mechanism. This not only improves the operator's work efficiency but also reduces operator fatigue. Therefore, sewing machines with electric presser foot lifting devices are now quite common and widespread.

[0003] However, while existing electric presser foot lifting devices on sewing machines have the aforementioned advantages, power outages or trips frequently occur in areas or countries with unstable power supplies. In particular, power outages or trips during sewing operations can cause sudden interruptions to the sewing process, leading to various malfunctions such as jamming or interference of components like needles, hooks, threads, and fabric. In such cases, the presser foot must be raised before troubleshooting each component in sequence. Since existing electric presser foot lifting devices do not have a manual lifting function, maintenance personnel must disassemble the relevant mechanisms or devices inside the machine before they can raise the presser foot and troubleshoot each component in sequence. This significantly increases the labor costs for maintenance and operation personnel.

[0004] In view of this, the applicant has devoted himself to researching and applying theoretical principles to address the shortcomings of the prior art, and has made every effort to solve the aforementioned problems, which has become the target of the applicant's improvement. Utility Model Content

[0005] One objective of this application is to provide an electric presser foot lifting device with a manual lifting mechanism, which can eliminate the disassembly and assembly process of parts, thereby significantly saving labor costs.

[0006] To achieve the above objectives, this application provides an electric presser foot lifting device with a manual lifting mechanism for a sewing machine. The sewing machine has a body, including an electric lifting mechanism, a presser foot mechanism, and a manual lifting mechanism. The electric lifting mechanism includes a motor fixed to the body and a transmission assembly driven by the motor. The transmission assembly includes a pivot shaft pivotally mounted on the body, a swing arm connected to the pivot shaft, and a handle connected to the swing arm. The presser foot mechanism includes a presser foot rod, a presser foot plate, and a lifting component. The presser foot rod is movably inserted through the body, the presser foot plate is fixed to the presser foot rod, and the lifting component is fixed to the presser foot rod and connected to the handle. The manual lifting mechanism includes a lever, a rod body, and a cam. The lever and the cam are respectively connected to both ends of the rod body, the rod body is pivotally mounted on the body, and the cam is configured corresponding to the lifting component. When the lever is manually turned, the lifting component and the presser foot rod can be lifted by the cam.

[0007] In one embodiment, a guide member is also included, which is fixed to the body. The guide member is provided with a guide groove, and the lifting member extends with a block, which is embedded in the guide groove.

[0008] In one embodiment, the presser foot mechanism further includes an auxiliary lifting component, which is fixed to the presser foot rod and connected to the pull handle, and the auxiliary lifting component is located above the lifting component.

[0009] In one embodiment, the auxiliary lifting member extends with an auxiliary insert, which is embedded in the guide groove.

[0010] In one embodiment, the handle is provided with a first long groove and a second long groove, the lifting member extends with a protrusion, the auxiliary lifting member extends with an auxiliary protrusion, the protrusion passes through the first long groove and is locked by a screw, and the auxiliary protrusion passes through the second long groove and is locked by another screw.

[0011] In one embodiment, the auxiliary lifting component is provided with a spanning block, and the guide component is provided with a support arm for placing the spanning block.

[0012] In one embodiment, the manual lifting mechanism further includes a return spring, which is sleeved around the outside of the rod and its two ends abut against the handle and the body, respectively.

[0013] In one embodiment, the presser foot mechanism further includes an auxiliary lifting component, which is fixed to the presser foot rod and connected to the pull handle, and the auxiliary lifting component is located above the lifting component.

[0014] In one embodiment, the handle is provided with a first long groove and a second long groove, the lifting member extends with a protrusion, the auxiliary lifting member extends with an auxiliary protrusion, the protrusion passes through the first long groove and is locked by a screw, and the auxiliary protrusion passes through the second long groove and is locked by another screw.

[0015] In one embodiment, a guide member is also included, which is fixed to the machine body. The auxiliary lifting member is provided with a spanning block, and the guide member is provided with a support arm for placing the spanning block.

[0016] This application also has the following advantages: by providing a guide member, rotation of the presser foot lever can be effectively prevented; by providing an auxiliary lifting member, the up-and-down movement of the presser foot lever is made smoother. Attached Figure Description

[0017] Figure 1 The image shows the appearance of the electric presser foot lifting device with manual lifting mechanism applied to a sewing machine assembly.

[0018] Figure 2 This is an enlarged view of the electric presser foot lifting device with manual lifting mechanism applied to a local area of ​​a sewing machine, as described in this application.

[0019] Figure 3 This is an exploded view of the electric presser foot lifting device with a manual lifting mechanism according to this application.

[0020] Figure 4 This is a schematic diagram of the electric presser foot lifting device assembly with a manual lifting mechanism according to this application.

[0021] Figure 5 This diagram illustrates the application of the electrically operated presser foot device with a manual lifting mechanism in a sewing machine.

[0022] Figure 6 for Figure 5 Enlarged view of some components.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10: Electric lifting mechanism;

[0025] 11: Electric motor;

[0026] 12: Transmission components;

[0027] 121: Shaft;

[0028] 122: Swing arm;

[0029] 123: Pull handle;

[0030] 1231: First long slot;

[0031] 1232: Second long slot;

[0032] 124: Screw fasteners;

[0033] 20: Presser foot mechanism;

[0034] 21: Presser foot bar;

[0035] 22: Presser foot plate;

[0036] 23: Lifting components;

[0037] 231: Insert;

[0038] 232: Convex prism;

[0039] 24: Auxiliary lifting components;

[0040] 241: Auxiliary block;

[0041] 242: Auxiliary protruding post;

[0042] 243: Cross-block design;

[0043] 25: Adjustment parts;

[0044] 30: Manual lifting mechanism;

[0045] 31: Lever;

[0046] 32: Rod body;

[0047] 33: Cam;

[0048] 34: Return spring;

[0049] 40: Guiding components;

[0050] 41: Guide groove;

[0051] 42: Support arm;

[0052] 8: Sewing machine;

[0053] 81: Body. Detailed Implementation

[0054] The detailed description and technical content of this application are explained below with reference to the accompanying drawings. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit this application.

[0055] Please see Figures 1 to 4 As shown, this application provides an electric presser foot lifting device with a manual lifting mechanism for a sewing machine 8. The sewing machine 8 has a body 81. The electric presser foot lifting device with a manual lifting mechanism mainly includes an electric lifting mechanism 10, a presser foot mechanism 20, and a manual lifting mechanism 30.

[0056] The electric lifting mechanism 10 mainly includes a motor 11 and a transmission assembly 12. The motor 11 can be a stepper motor, which is fixed in the internal space of the body 81 by screws or other locking components. The transmission assembly 12 is driven by the aforementioned motor 11 and mainly includes a rotating shaft 121, a swing arm 122, and a pull handle 123. The rotating shaft 121 is pivotally mounted on the aforementioned body 81 via a bushing (not shown). One end of the swing arm 122 is fixed to the rotating shaft 121 and swings with the rotation of the rotating shaft 121. The pull handle 123 is pivotally mounted on the swing arm 122 via a screw 124.

[0057] The presser foot mechanism 20 mainly includes a presser foot rod 21, a presser foot plate 22, and a lifting component 23. The presser foot rod 21 is movably connected to the aforementioned body 81 through a bushing. The presser foot plate 22 is fixed to the bottom end of the presser foot rod 21. The lifting component 23 is fixed to the upper part of the presser foot rod 21 and connected to the aforementioned pull handle 123.

[0058] The manual lifting mechanism 30 mainly includes a lever 31, a rod 32 and a cam 33. The lever 31 and the cam 33 are respectively connected to the two ends of the rod 32. The rod 32 is pivotally mounted on the aforementioned body 81, and the cam 33 is configured corresponding to the lifting component 23.

[0059] In one embodiment, the electric presser foot lifting device with manual lifting mechanism of this application further includes a guide member 40, which is fixed to the aforementioned body 81. The guide member 40 is provided with a guide groove 41, and the aforementioned lifting member 23 extends with a block 231, which is embedded in the guide groove 41 to prevent the presser foot rod 21 from rotating.

[0060] In one embodiment, the presser foot mechanism 20 further includes an auxiliary lifting component 24 and an adjusting component 25. The auxiliary lifting component 24 is fixed to the upper part of the presser foot rod 21 and connected to the aforementioned pull handle 123. The auxiliary lifting component 24 is located above the lifting component 23. The adjusting component 25 is fixed to the body 81 to guide the movement of the presser foot rod 21.

[0061] In one embodiment, the auxiliary lifting member 24 extends with an auxiliary insert 241, which is fitted into the aforementioned guide groove 41 to prevent the pressure foot rod 21 from rotating.

[0062] In one embodiment, the handle 123 is provided with a first long groove 1231 and a second long groove 1232, the lifting member 23 extends with a protrusion 232, the auxiliary lifting member 24 extends with an auxiliary protrusion 242, the protrusion 232 passes through the first long groove 1231 and is locked by a screw, and the auxiliary protrusion 242 passes through the second long groove 1232 and is locked by another screw.

[0063] In one embodiment, the auxiliary lifting member 24 is further provided with a spanning block 243, and the guide member 40 is further provided with a support arm 42, which is for placing the spanning block 243.

[0064] In one embodiment, the manual lifting mechanism 30 further includes a return spring 34, which is sleeved around the outside of the rod 32, and its two ends abut against the handle 31 and the body 81 respectively, thereby assisting the handle 31 in performing a reset action.

[0065] In use, the electric motor 11 drives the transmission assembly 12, and the rotation of the rotating shaft 121 causes the swing arm 122 to swing upward, which in turn drives the pull handle 123 to lift the presser foot rod 21, presser foot plate 22, lifting component 23 and auxiliary lifting component 24 together, thereby achieving electric lifting of the presser foot.

[0066] Please see Figure 5 and Figure 6 As shown, when encountering an emergency and unable to be driven by the motor 11, the lever 31 is turned manually, and the lifting component 23 is raised by rotating the rod 32 and the cam 33. At the same time, the presser foot rod 21 and the presser foot plate 22 are also raised. This allows for troubleshooting of various faults without the need for extensive disassembly of the machine body and related parts, thereby significantly reducing the labor costs of maintenance and operation personnel.

[0067] The above description is only a preferred embodiment of this application and is not intended to limit the patent scope of this application. Other equivalent changes that utilize the patent spirit of this application should all fall within the patent scope of this application.

Claims

1. An electric presser foot lifting device with a manual lifting mechanism, characterized in that, For use in a sewing machine, the sewing machine having a body, including: An electric lifting mechanism includes a motor fixed to the machine body and a transmission assembly driven by the motor. The transmission assembly includes a rotating shaft pivotally mounted on the machine body, a swing arm connected to the rotating shaft, and a handle connected to the swing arm. A presser foot mechanism includes a presser foot rod, a presser foot plate, and a lifting component. The presser foot rod is movably connected to the machine body. The presser foot plate is fixed to the presser foot rod. The lifting component is fixed to the presser foot rod and connected to the pull handle. A manual lifting mechanism includes a lever, a rod, and a cam. The lever and the cam are respectively connected to both ends of the rod. The rod is pivotally mounted on the machine body, and the cam is configured to correspond to the lifting component. When the lever is manually turned, the lifting component and the presser foot can be raised by the cam.

2. The electric presser foot lifting device with a manual lifting mechanism as described in claim 1, characterized in that, It also includes a guide member fixed to the body, the guide member having a guide groove, and the lifting member extending with a block, the block being embedded in the guide groove.

3. The electric presser foot lifting device with a manual lifting mechanism as described in claim 2, characterized in that, The presser foot mechanism also includes an auxiliary lifting component, which is fixed to the presser foot rod and connected to the pull handle, and the auxiliary lifting component is located above the lifting component.

4. The electric presser foot lifting device with a manual lifting mechanism as described in claim 3, characterized in that, The auxiliary lifting component extends with an auxiliary insert, which is embedded in the guide groove.

5. The electric presser foot lifting device with a manual lifting mechanism as described in claim 3, characterized in that, The pull handle is provided with a first long groove and a second long groove. The lifting component extends with a protruding post, and the auxiliary lifting component extends with an auxiliary protruding post. The protruding post passes through the first long groove and is locked by a screw. The auxiliary protruding post passes through the second long groove and is locked by another screw.

6. The electric presser foot lifting device with a manual lifting mechanism as described in claim 3, characterized in that, The auxiliary lifting component is provided with a spanning block, and the guide component is provided with a support arm, which is used to place the spanning block.

7. The electric presser foot lifting device with a manual lifting mechanism as described in claim 1, characterized in that, The manual lifting mechanism also includes a return spring, which is sleeved around the outside of the rod and its two ends abut against the handle and the body, respectively.

8. The electric presser foot lifting device with a manual lifting mechanism as described in claim 1, characterized in that, The presser foot mechanism also includes an auxiliary lifting component, which is fixed to the presser foot rod and connected to the pull handle, and the auxiliary lifting component is located above the lifting component.

9. The electric presser foot lifting device with a manual lifting mechanism as described in claim 8, characterized in that, The pull handle is provided with a first long groove and a second long groove. The lifting component extends with a protruding post, and the auxiliary lifting component extends with an auxiliary protruding post. The protruding post passes through the first long groove and is locked by a screw. The auxiliary protruding post passes through the second long groove and is locked by another screw.

10. The electric presser foot lifting device with a manual lifting mechanism as described in claim 8, characterized in that, It also includes a guide component fixed to the machine body, the auxiliary lifting component is provided with a spanning block, the guide component is provided with a support arm, and the support arm is for placing the spanning block.

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