A nail file

Abstract

The utility model relates to a kind of nail grinders, including transmission assembly, adjusting assembly and tool bit, adjusting assembly is set on transmission assembly;Tool bit is located on transmission assembly;Transmission assembly includes motor, slidable output shaft and quick release sleeve, motor output end transmission connection slidable output shaft, the one end of slidable output shaft away from motor is fixedly connected with quick release sleeve, the one end of quick release sleeve away from motor is equipped with the quick release hole for installing tool bit, quick release sleeve outer sleeve is equipped with fixed sleeve, quick release sleeve is active relative to fixed sleeve to adjust the aperture of quick release hole;Adjusting assembly is set on slidable output shaft;Adjusting assembly includes transmission shaft sleeve and outer sleeve assembly of transmission connection, transmission shaft sleeve is located below slidable output shaft, and the both ends of transmission shaft sleeve are respectively equipped with elastic component;Rotating outer sleeve assembly to drive transmission shaft sleeve to slide along the axial direction of nail grinder, to drive quick release sleeve to slide along the direction of close to or away from motor.

Description

Technical Field

[0001] This utility model relates to the field of nail grinding technology, and in particular to a nail grinding device. Background Technology

[0002] In recent years, with the increasing demand for nail care, electric nail grinders have become mainstream in the market due to their efficiency and convenience. However, existing products suffer from the challenge of blade replacement. Traditional models mostly use threaded or snap-fit ​​fixing structures, which are time-consuming to replace and prone to causing wear and tear on parts during operation. Some malfunctions stem from blade failure. Current mainstream solutions involve cumbersome replacement processes requiring tools for disassembly, have poor compatibility, and are difficult to interchange with different blade models. These issues limit the user experience, especially in professional nail care settings, where frequent blade replacement difficulties reduce service efficiency. Utility Model Content

[0003] To address the technical problem of time-consuming tool replacement in existing systems, this invention provides an armor grinder.

[0004] The present invention provides a nail grinder, comprising a transmission assembly, an adjustment assembly, and a blade. The adjustment assembly is sleeved on the transmission assembly; the blade is disposed on the transmission assembly; the transmission assembly includes a motor, a slidable output shaft, and a quick-release sleeve, all three being coaxially arranged. The output end of the motor is drivenly connected to the slidable output shaft. The quick-release sleeve is fixedly connected to the end of the slidable output shaft away from the motor. The end of the quick-release sleeve away from the motor has a quick-release hole for mounting the blade. A fixed sleeve is sleeved on the quick-release sleeve, and the quick-release sleeve moves relative to the fixed sleeve to adjust the diameter of the quick-release hole; the adjustment assembly is sleeved on the slidable output shaft. The adjustment assembly includes a transmission shaft sleeve and an outer sleeve assembly that are connected by transmission. The transmission shaft sleeve is located at one end of the slidable output shaft near the motor, and elastic components are provided at both ends of the transmission shaft sleeve. Rotating the outer sleeve assembly drives the transmission shaft sleeve to slide along the axial direction of the armor grinder, thereby causing the quick-release sleeve to slide in a direction closer to or away from the motor.

[0005] Preferably, the quick-release sleeve has a cylindrical hollow structure with openings at both ends. The clamping end away from the motor has a quick-release hole and multiple gaps. When the quick-release sleeve moves towards the motor, the fixing sleeve presses against the clamping end, compressing the gaps and reducing the diameter of the quick-release hole. When the quick-release sleeve moves away from the motor, the fixing sleeve no longer presses against the clamping end, increasing the gaps and increasing the diameter of the quick-release hole.

[0006] Preferably, the slidable output shaft and the quick-release sleeve are connected by threads.

[0007] Preferably, the armor grinder further includes a shell assembly, which includes an inner sleeve and an outer sleeve; the outer sleeve is fitted onto the inner sleeve; the inner sleeve has external threads at both ends, and the shell assembly is threadedly connected to the inner sleeve.

[0008] Preferably, the armor grinder further includes a circuit assembly, and a first connector is sleeved on the non-output end of the motor. The first connector has a slot, and the circuit assembly is fixed on the slot.

[0009] Preferably, the fixed sleeve is provided with an outer bushing, and the two ends of the outer bushing are provided with at least one bearing, the inner ring of the bearing mates with the fixed sleeve, and the outer ring of the bearing mates with the outer housing assembly.

[0010] Preferably, the motor output end is provided with an output shaft sleeve, and the output shaft sleeve is connected to the slidable output shaft for transmission.

[0011] Preferably, the inner sleeve is provided with an arc-shaped guide rail that passes through the inner sleeve, the inner wall of the outer sleeve is provided with a linear guide rail arranged along the axial direction, and a transmission ball is provided between the inner sleeve and the outer sleeve, the transmission ball sliding between the linear guide rail and the arc-shaped guide rail simultaneously.

[0012] Preferably, a rolling track is provided at the center of the transmission shaft sleeve, and the transmission ball moves on the rolling track.

[0013] Preferably, the elastic component includes a first elastic element and a second elastic element. The first elastic element is sleeved on the slidable output shaft, and its two ends respectively abut against the slidable output shaft and the fixed sleeve. The second elastic element is sleeved on the output shaft sleeve, and its two ends respectively abut against the transmission shaft sleeve and the transmission component.

[0014] Compared with the prior art, the nail grinder provided by this utility model has the following advantages: 1. This utility model provides a nail grinder, including a transmission component, an adjustment component, and a blade head. These three components combine to form a system where the blade head can be replaced without tools simply by rotating the adjustment component. The adjustment component is sleeved on the transmission component, and the blade head is mounted on the transmission component. This design allows the adjustment component to directly act on the slidable output shaft of the transmission component. In this embodiment, rotating the outer sleeve component drives the transmission shaft sleeve to push the slidable output shaft to slide axially, compressing the elastic component and causing the quick-release sleeve to slide relative to the fixed sleeve. This achieves a change in the diameter of the quick-release hole, enabling quick installation and removal of the blade head. Simultaneously, the sliding adjustment of the adjustment component allows for precise control of the blade head position and the diameter of the quick-release hole, improving the applicability and ease of operation of the nail grinder. Blade head replacement and adjustment can be completed without tools. The elastic component provides a supporting force to prevent accidental contact with the outer sleeve and change in the diameter of the quick-release hole, while also providing a rebound force for the sliding output shaft.

[0015] 2. In the armor grinder provided in this embodiment of the utility model, the diameter of the quick-release hole is adjusted by the sliding of the quick-release sleeve and the squeezing action of the fixed sleeve. When the quick-release sleeve approaches the motor, the diameter of the quick-release hole is limited by the action of the fixed sleeve, thereby fixing the blade and realizing the quick clamping and release of the blade head. The blade head can be replaced simply by rotating the adjustment component, which greatly improves the operating efficiency. The gap design allows for flexible changes in the hole diameter, ensuring that the blade head is firmly installed, preventing loosening during use, and improving safety and convenience.

[0016] 3. In the armor grinder provided in this embodiment of the present invention, the slidable output shaft and the quick-release sleeve are connected by threads. The threaded connection provides a robust and reliable mechanical fixation, preventing the quick-release sleeve from loosening or falling off during high-speed operation, ensuring the stability and safety of the transmission components, and simplifying the manufacturing and assembly process.

[0017] 4. In the nail grinder provided in this embodiment of the present invention, the outer shell assembly and the inner sleeve are connected by threads. The outer shell assembly is fixed to the inner sleeve by threads, which not only provides good structural support and protection, preventing the internal components from being impacted by external forces, but also makes the assembly and disassembly of the nail grinder easier, facilitates daily maintenance and cleaning, and extends its service life.

[0018] 5. In the armor grinder provided in this embodiment of the present invention, the circuit components are fixed by the slot of the first connector. The slot structure ensures the stable installation of the circuit components, prevents loose wires or short circuits, and improves electrical safety and connection reliability.

[0019] 6. In the armor grinder provided in this embodiment of the utility model, an outer bushing and a bearing are provided on the fixed sleeve. The inner ring of the bearing mates with the fixed sleeve, and the outer ring mates with the outer shell assembly. The bearing support reduces the frictional resistance of the fixed sleeve during rotation, making the blade run more smoothly and efficiently. At the same time, it reduces wear and energy loss, improves the overall performance and service life of the armor grinder, and enhances the comfort of operation. The outer bushing acts as a limiter for the bearing, preventing the bearing from sliding inside the shell and affecting the overall stability.

[0020] 7. In the nail grinder provided in this embodiment of the utility model, an output shaft sleeve is provided at the motor output end for transmission connection with a slidable output shaft. The output shaft sleeve, as an intermediate transmission component, improves the connection strength between the motor and the slidable output shaft, reduces direct friction and wear, thereby enhancing the durability and operational stability of the nail grinder, ensuring the stability of the blade head during high-speed rotation. The open connection between the output shaft sleeve and the slidable output shaft allows the slidable output shaft to slide during blade head replacement.

[0021] 8. In the nail grinder provided in this embodiment of the utility model, an arc-shaped guide rail, a linear guide rail, and a transmission ball are provided between the inner and outer parts. The transmission ball can move along the arc-shaped guide rail due to the resistance of the linear guide rail. The transmission process is smooth and controllable, which improves the accuracy of the blade clamping force adjustment and the user experience.

[0022] 9. In the armor grinder provided in this embodiment of the utility model, a rolling track is provided at the center of the transmission shaft sleeve for the movement of the transmission ball. The cooperation between the rolling track and the transmission ball significantly reduces motion friction. While the transmission ball moves along the arc track, it also rolls within the rolling track. This transmission method is smoother and more precise, improving transmission efficiency and response speed, and enhancing the user experience and equipment reliability.

[0023] 10. In the nail grinder provided in this embodiment of the utility model, the elastic component includes a first elastic element and a second elastic element, which are respectively sleeved on the slidable output shaft and the output shaft sleeve. The multi-elastic component layout provides multi-level buffering and shock absorption effects, effectively absorbing impacts and vibrations during operation, protecting internal components from damage, reducing noise levels, thereby improving the stability and user comfort of the nail grinder. The second elastic element provides a supporting force to prevent accidental contact with the outer sleeve from causing changes in the diameter of the quick-release hole, while also providing a rebound force for the sliding of the slidable output shaft. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an armor grinder provided in an embodiment of this utility model.

[0026] Figure 2 This is a schematic diagram of the transmission component structure of an armor grinder provided in an embodiment of this utility model.

[0027] Figure 3 This is a schematic diagram of the adjustment component structure of an armor grinder provided in an embodiment of this utility model.

[0028] Figure 4 This is a schematic diagram of the internal structure of the adjustment component of an armor grinder provided in an embodiment of this utility model.

[0029] Figure 5 This is a cross-sectional view of an armor grinder provided in an embodiment of this utility model.

[0030] Figure 6 This is a schematic diagram of the quick-release sleeve and the fixed sleeve of an armor grinder provided in an embodiment of this utility model.

[0031] Figure 7 This is a schematic diagram of the circuit components of an armor grinder provided in an embodiment of the present invention.

[0032] Figure 8 This is a schematic diagram of the sliding output shaft of an armor grinder provided in an embodiment of this utility model.

[0033] Figure 9 This is a cross-sectional view of the adjustment component of an armor grinder provided in an embodiment of this utility model.

[0034] Explanation of reference numerals in the attached diagram: 100. Nail grinder; 1. Housing assembly; 11. First housing; 12. Second housing; 2. Circuit components; 21. Circuit board; 211. Digital tube; 22. Button; 23. Charging port; 231. End cap; 232. Buckle; 24. First connector; 25. Battery; 26. Cover plate; 27. Screw; 28. Slot; 3. Transmission assembly; 31. Motor; 32. Output shaft sleeve; 33. Sliding output shaft; 34. Quick-release sleeve; 341. Quick-release hole; 35. Fixed sleeve; 351. Second connecting piece; 36. Outer shaft sleeve; 361. Bearing; 37. Transition head; 38. Shim; 4. Adjustment assembly; 40. Outer sleeve assembly; 41. Inner sleeve; 411. Arc-shaped guide rail; 412. External thread; 42. Outer sleeve; 421. Linear guide rail; 43. Transmission ball; 44. Transmission shaft sleeve; 441. Rolling track; 45. Elastic assembly; 451. First elastic element; 452. Second elastic element; 5. Blade head. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0036] It should be noted that the terms "first" and "second" in the specification and claims of this utility model are used to distinguish different objects, rather than to describe a specific order.

[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0038] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0040] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0041] Please see Figure 1 This utility model provides a nail grinder 100, including a transmission component 3, an adjustment component 4, and a blade head 5. The adjustment component 4 is sleeved on the transmission component 3; the blade head 5 is disposed on the transmission component 3; the transmission component 3 is used to provide power to the entire system and transmit power to the blade head 5; the adjustment component 4 cooperates with the transmission component 3 to realize the replacement of the blade head; the blade head 5 is used for grinding.

[0042] Please continue reading. Figure 2 The transmission assembly 3 includes a motor 31, a slidable output shaft 33, and a quick-release sleeve 34. The output end of the motor 31 is connected to the slidable output shaft 33. The end of the slidable output shaft 33 away from the motor 31 is fixedly connected to the quick-release sleeve 34. The motor 31, the slidable output shaft 33, and the quick-release sleeve 34 are coaxially arranged. The end of the quick-release sleeve 34 away from the motor 31 is provided with a quick-release hole 341 for installing the cutter head 5. A fixing sleeve 35 is fitted over the quick-release sleeve 34. The quick-release sleeve 34 moves relative to the fixing sleeve 35 to adjust the diameter of the quick-release hole 341. The adjustment assembly 4 is fitted onto the slidable output shaft 33. As can be seen, in this embodiment, the motor 31 provides power to drive the slidable output shaft 33, which in turn drives the quick-release sleeve 34 and the cutter head 5 to rotate, thereby realizing the grinding function; the clamping and releasing of the cutter head 5 is achieved by controlling the size of the quick-release hole 341; the adjustment component 4 acts directly on the slidable output shaft 33, and the sliding of the slidable output shaft 33 can drive the quick-release sleeve 34 to slide relative to the fixed sleeve 35. The pressing position of the fixed sleeve 35 on the quick-release sleeve 34 changes, thereby changing the size of the quick-release hole 341, and thus controlling the clamping and releasing of the cutter head 5.

[0043] Please continue reading. Figure 3 and Figure 4 The adjustment component 4 includes a transmission shaft sleeve 44 and an outer sleeve assembly 40 connected by transmission. The transmission shaft sleeve 44 is located at the end of the slidable output shaft 33 near the motor, and elastic components 45 are respectively provided at both ends of the transmission shaft sleeve 44. Rotating the outer sleeve assembly 40 drives the transmission shaft sleeve 44 to slide along the axial direction of the armor grinder 100, thereby driving the quick-release sleeve 34 to slide in the direction of approaching or moving away from the motor 31.

[0044] Understandably, this embodiment includes a transmission assembly 3, an adjustment assembly 4, and a cutter head 5. These three components combine to form a system where the cutter head 5 can be replaced without tools simply by rotating the adjustment assembly 4. The adjustment assembly 4 is sleeved on the transmission assembly 3, and the cutter head 5 is mounted on the transmission assembly 3. This design allows the adjustment assembly 4 to directly act on the slidable output shaft 33 of the transmission assembly 3. In this embodiment, rotating the outer sleeve assembly 40 drives the transmission shaft sleeve 44 to push the slidable output shaft 33 to slide axially, compressing the elastic assembly 45, thereby causing the quick-release sleeve 34 to slide relative to the fixed sleeve 35, achieving quick release. The change in the diameter of hole 341 enables quick installation and removal of the cutter head 5. Simultaneously, by adjusting the sliding mechanism 4, the position of the cutter head 5 and the diameter of the quick-release hole 341 can be precisely controlled, improving the applicability and ease of operation of the armor grinder 100. The outer casing component 40 is exposed outside the outer casing component 1, so replacing the cutter head does not require disassembling the outer casing component 1; the cutter head 5 can be replaced and adjusted without tools. The elastic component 45 provides a retaining force to prevent accidental contact with the outer casing component 40, thus preventing changes in the diameter of the quick-release hole 341, and also provides a restoring force for the sliding output shaft 33. Please see Figure 5 and Figure 6 The quick-release sleeve 34 has a cylindrical hollow structure inside with openings at both ends. The clamping end of the quick-release sleeve 34 away from the motor 31 is provided with a quick-release hole 341 and multiple gaps around the quick-release hole 341. It is necessary to first introduce the fixed sleeve with a "limiting hole". Then, it is explained that the "outer diameter" of the clamping section of the quick-release sleeve gradually increases in the direction away from the motor, so it can only make the quick-release hole smaller when it is matched with the fixed sleeve. When the quick-release sleeve 34 moves toward the motor 31, the fixed sleeve 35 presses against the clamping end, compressing the gap and reducing the diameter of the quick-release hole 341; when the quick-release sleeve 34 moves away from the motor 31, the fixed sleeve 35 no longer presses against the clamping end, the gap widens, and the diameter of the quick-release hole 341 increases.

[0045] Specifically, the quick-release sleeve 34 has a flared structure at its clamping end, with the outer diameter of the structure gradually increasing away from the motor. The inner diameter of the fixed sleeve clamping end also gradually increases away from the motor. This structure cooperates with the flared structure at the clamping end of the quick-release sleeve 34, and the inner diameter of the fixed sleeve clamping end is always slightly smaller than the outer diameter of the flared structure of the quick-release sleeve. When the quick-release sleeve retracts, it compresses the gap, fixing the quick-release sleeve and the cutter head. When the quick-release sleeve slides out, the gap widens, releasing the quick-release sleeve and the cutter head, thus achieving the quick-release function. The fixed sleeve 35 has a second connector 351 at the end away from the cutter head 5, which is threadedly connected to the fixed sleeve 35 to prevent the elastic component 45 from directly applying force to the fixed sleeve 35, which could damage the fixed sleeve 35. A gasket 38 is provided between the second connector 351 and the bearing 361. The gasket 38 is wavy in shape and is used for dynamic gap elimination, vibration attenuation, and noise reduction during operation.

[0046] Understandably, in this embodiment of the invention, the diameter of the quick-release hole 341 is adjusted by the sliding of the quick-release sleeve 34 and the squeezing action of the fixed sleeve 35. When the quick-release sleeve 34 approaches the motor 31, the diameter of the quick-release hole 341 is limited by the action of the fixed sleeve 35, thereby fixing the tool and realizing the quick clamping and release of the cutter head 5. The cutter head 5 can be replaced simply by rotating the adjustment component 4, which greatly improves the operating efficiency. The gap design allows for flexible changes in the hole diameter, ensuring that the cutter head 5 is firmly installed, preventing loosening during use, and improving safety and convenience.

[0047] Please see Figure 2 The fixed sleeve 35 is provided with an outer bushing 36, and at both ends of the outer bushing 36 are provided with at least one bearing 361. The inner ring of the bearing 361 is engaged with the fixed sleeve 35, and the outer ring of the bearing 361 is engaged with the outer shell assembly 1.

[0048] Understandably, an outer bushing 36 and a bearing 361 are provided on the fixed sleeve 35. The inner ring of the bearing 361 mates with the fixed sleeve 35, and the outer ring mates with the outer housing assembly 1. The bearing 361 supports and reduces the frictional resistance of the fixed sleeve 35 during rotation, making the cutter head 5 run more smoothly and efficiently. At the same time, it reduces wear and energy loss, improves the overall performance and service life of the armor grinder 100, and enhances the comfort of operation.

[0049] Please see Figure 8 The slidable output shaft 33 and the quick-release sleeve 34 are connected by threads.

[0050] Understandably, in this embodiment of the invention, the slidable output shaft 33 and the quick-release sleeve 34 are connected by threads. The threaded connection provides a robust and reliable mechanical fixation, preventing the quick-release sleeve 34 from loosening or falling off during high-speed operation, ensuring the stability and safety of the transmission assembly 3, while simplifying the manufacturing and assembly process.

[0051] The output end of the motor 31 is provided with an output shaft sleeve 32, which is connected to the sliding output shaft 33 for transmission.

[0052] Understandably, in this embodiment of the invention, an output shaft sleeve 32 is provided at the output end of the motor 31, which is connected to a sliding output shaft 33. The output shaft sleeve 32, as an intermediate transmission component, improves the connection strength between the motor 31 and the sliding output shaft 33, reduces direct friction and wear, thereby enhancing the durability and operational stability of the armor grinder 100 and ensuring the stability of the blade head 5 during high-speed rotation. The open connection between the output shaft sleeve 32 and the sliding output shaft 33 allows the sliding output shaft 33 to slide during blade head 5 replacement.

[0053] The output shaft sleeve 32 has a cross groove at the end away from the motor 31, and the slidable output shaft 33 has a cross boss corresponding to the cross groove. The cross connection structure can make the slidable output shaft 33 and the output shaft sleeve 32 openly connected while transmitting power. When the slidable output shaft 33 moves towards the cutter head 5 under the action of the adjusting component 4, it can disengage from the output shaft sleeve 32. When the slidable output shaft 33 moves away from the cutter head 5, it restores the connection with the output shaft sleeve 32. A limiting ring is provided on the side of the cross boss of the slidable output shaft 33 away from the output shaft sleeve 32 to limit the connection depth between the slidable output shaft 33 and the output shaft sleeve 32. The cross connection structure can be replaced by any non-circular cross section connection structure to achieve synchronous rotation of the two components.

[0054] Please see Figure 1 This embodiment also includes a housing assembly 1, and the outer housing assembly 40 includes an inner sleeve 41 and an outer sleeve 42; the outer sleeve 42 is fitted onto the inner sleeve 41; the two ends of the inner sleeve 41 are provided with external threads 412, and the housing assembly 1 is threadedly connected to the inner sleeve 41.

[0055] Understandably, in this embodiment of the present invention, the outer shell assembly 1 and the inner sleeve 41 are connected by threads. The outer shell assembly 1 is fixed to the inner sleeve 41 by threads, which not only provides good structural support and protection, preventing the internal components from being impacted by external forces, but also makes the assembly and disassembly of the armor grinder 100 easier, facilitates daily maintenance and cleaning, and extends its service life.

[0056] Please see Figure 1 and Figure 5 The outer casing assembly 1 includes a first outer casing 11 and a second outer casing 12. The first outer casing 11 and the second outer casing 12 are provided with internal threads corresponding to the connection positions with the inner casing 41. The first outer casing 11 is located on the side away from the cutter head 5, and the second outer casing 12 is located on the side closer to the cutter head 5. The diameter of the internal cavity of the second outer casing near the cutter head 5 is relatively smaller. The diameter of the smaller cavity is adapted to the diameter of the quick-release sleeve 34, forming an annular surface with the larger cavity. This annular surface engages with the edge of the fixed sleeve 35, thereby limiting the position of the fixed sleeve 35 and ensuring that the position of the fixed sleeve 35 remains unchanged during the movement of the quick-release sleeve 34.

[0057] Please see Figure 7 This embodiment also includes a circuit component 2. A first connector 24 is sleeved on the non-output end of the motor 31. The first connector 24 has a slot 28, and the circuit component 2 is fixed on the slot 28.

[0058] Understandably, in this embodiment of the invention, the circuit assembly 2 is fixed by the slot 28 of the first connector 24. The slot 28 structure ensures the stable installation of the circuit assembly 2, prevents loose wires or short circuits, and improves electrical safety and connection reliability.

[0059] The circuit assembly 2 includes a circuit board 21 and a first connector 24. One end of the first connector 24 is sleeved on the motor 31, and the other end is provided with a slot 28. The circuit board 21 is fixed in the slot 28. The circuit board 21 is provided with a digital tube 211, which is electrically connected to the circuit board 21 for displaying operating parameters. A button 22 is provided above the circuit board 21. The button 22 is exposed through a clearance hole in the first housing 11. A cover plate 26 is provided above the button 22. The circuit board 21 and the cover plate 26 are connected by screws 27. A battery 25 is provided below the circuit board 21. A charging port 23 is provided at the end of the circuit board 21 away from the motor 31. An end cover 231 is provided on the charging port 23. A buckle 232 is provided on the end cover 231 for connecting to the second housing 12. Furthermore, the circuit board 21, the battery 25, the button 22 and the motor 31 are electrically connected. The button 22 can be used to control the start and stop of the motor 31 and control the speed of the motor 31.

[0060] Please see Figure 3 The inner sleeve 41 is provided with an arc-shaped guide rail 411, which passes through the inner sleeve 41. The inner wall of the outer sleeve 42 is provided with a linear guide rail 421 arranged along the axial direction. A transmission ball 43 is provided between the inner sleeve 41 and the outer sleeve 42, and the transmission ball 43 slides between the linear guide rail 421 and the arc-shaped guide rail 411.

[0061] Understandably, in this embodiment of the invention, an arc-shaped guide rail 411, a linear guide rail 421, and a transmission ball 43 are provided between the inner component 41 and the outer component 42. The transmission ball 43 can move along the arc-shaped guide rail 411 due to the support of the linear guide rail 421. The transmission process is smooth and controllable, which improves the accuracy of the clamping force adjustment of the cutter head 5 and the user experience.

[0062] Please see Figure 3 and Figure 5 Specifically, the outer surface of the outer sleeve 42 is patterned to increase friction and improve grip; the travel length of the arc-shaped guide rail 411 corresponds to the sliding length of the slidable output shaft 33, and the sliding length is not greater than the distance between the end of the quick-release sleeve 34 near the cutter head 5 and the end of the second housing near the cutter head 5 when the quick-release sleeve 34 is fully retracted into the fixed sleeve 35.

[0063] Please see Figure 4 A rolling track 441 is provided around the center of the transmission shaft sleeve 44, and the transmission ball 43 moves on the rolling track 441.

[0064] Understandably, in this embodiment of the invention, a rolling track 441 is provided at the center of the transmission shaft sleeve 44 for the transmission ball 43 to move. The cooperation between the rolling track 441 and the transmission ball 43 significantly reduces motion friction. While the transmission ball 43 moves along the arc-shaped track, it also rolls within the rolling track 441. This transmission method is smoother and more precise, improving transmission efficiency and response speed, and enhancing user experience and equipment reliability.

[0065] Please see Figure 4 and Figure 9 The elastic component 45 includes a first elastic element 451 and a second elastic element 452. The first elastic element 451 is sleeved on the slidable output shaft 33 and its two ends respectively abut against the slidable output shaft 33 and the fixed sleeve 35. The second elastic element 452 is sleeved on the output shaft sleeve 32 and its two ends respectively abut against the transmission shaft sleeve 44 and the transmission component 3.

[0066] Understandably, in this embodiment of the invention, the elastic component 45 includes a first elastic element 451 and a second elastic element 452, which are respectively sleeved on the slidable output shaft 33 and the output shaft sleeve 32. The multi-elastic component 45 layout provides multi-level buffering and shock absorption, effectively absorbing shocks and vibrations during operation, protecting internal components from damage, and reducing noise levels, thereby improving the stability and user comfort of the armor grinder 100. The second elastic element 452 provides a supporting force to prevent accidental contact with the outer sleeve 42, which could cause changes in the diameter of the quick-release hole 341, while also providing a rebound force for the sliding of the slidable output shaft 33.

[0067] Specifically, the first elastic element 451 is compressed when the outer sleeve 42 rotates, and the second elastic element 452 is compressed to absorb shock when there is a large vibration during grinding.

[0068] Please see Figure 6 and Figure 8 The fixed sleeve 35 is provided with a second connector 351 near the motor 31. The second connector 351 is threadedly connected to the fixed sleeve 35. The first elastic member 451 is in direct contact with the second connector 351. The transmission assembly 3 includes a transition head 37, which is located at the output end of the motor 31. The second elastic member 452 is in direct contact with the transition head 37.

[0069] Specifically, when the outer assembly 42 is rotated counterclockwise, the transmission ball 43 slides between the arc-shaped track and the straight track, causing the transmission shaft sleeve 44 to compress the first elastic element 451, so that the slidable output shaft 33 moves axially away from the motor 31, and causes the quick-release sleeve 34 to move in the same direction; when the rotational force applied to the outer assembly 42 is stopped, the transmission ball 43 slides between the arc-shaped track and the straight track, and the first elastic element 451 releases its elastic force on the transmission shaft sleeve 44, so that the slidable output shaft 33 moves axially towards the motor 31, and causes the quick-release sleeve 34 to move in the same direction.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nail grinder, characterized in that: The device includes a transmission assembly, an adjustment assembly, and a cutting head. The adjustment assembly is sleeved on the transmission assembly. The cutting head is disposed on the transmission assembly. The transmission assembly includes a motor, a slidable output shaft, and a quick-release sleeve. The motor, the slidable output shaft, and the quick-release sleeve are coaxially arranged. The output end of the motor is drivenly connected to the slidable output shaft. The end of the slidable output shaft away from the motor is fixedly connected to the quick-release sleeve. The end of the quick-release sleeve away from the motor has a quick-release hole for mounting the cutting head. A fixed sleeve is sleeved on the quick-release sleeve. The quick-release sleeve moves relative to the fixed sleeve to adjust the diameter of the quick-release hole. The adjustment assembly is sleeved on the slidable output shaft. The adjustment assembly includes a transmission shaft sleeve and an outer sleeve assembly that are connected by transmission. The transmission shaft sleeve is located at the end of the slidable output shaft near the motor, and elastic components are provided at both ends of the transmission shaft sleeve. Rotating the outer sleeve assembly drives the transmission shaft sleeve to slide along the axial direction of the armor grinder, thereby causing the quick-release sleeve to slide in a direction closer to or away from the motor.

2. The nail grinder as described in claim 1, characterized in that: The quick-release sleeve has a hollow cylindrical structure with openings at both ends. The clamping end away from the motor has a quick-release hole and multiple gaps. When the quick-release sleeve moves toward the motor, the fixed sleeve squeezes the clamping end, the gaps are compressed, and the diameter of the quick-release hole becomes smaller. When the quick-release sleeve moves away from the motor, the fixed sleeve no longer presses against the clamping end, the gap increases, and the diameter of the quick-release hole increases.

3. The nail grinder as described in claim 1, characterized in that: The slidable output shaft and the quick-release sleeve are connected by threads.

4. The nail grinder as described in claim 1, characterized in that: The armor grinder also includes a shell assembly, which includes an inner sleeve and an outer sleeve; the outer sleeve is fitted onto the inner sleeve; the inner sleeve has external threads at both ends, and the shell assembly is threadedly connected to the inner sleeve.

5. The nail grinder as described in claim 1, characterized in that: The armor grinder also includes a circuit assembly. The non-output end of the motor is fitted with a first connector. The first connector has a slot, and the circuit assembly is fixed on the slot.

6. The nail grinder as described in claim 4, characterized in that: The fixed sleeve is provided with an outer bushing, and at both ends of the outer bushing are provided with at least one bearing. The inner ring of the bearing mates with the fixed sleeve, and the outer ring of the bearing mates with the outer housing assembly.

7. The nail grinder as described in claim 4, characterized in that: The motor output end is provided with an output shaft sleeve, which is connected to the slidable output shaft for transmission.

8. The nail grinder as described in claim 7, characterized in that: The inner component is provided with an arc-shaped guide rail that passes through the inner component. The inner wall of the outer component is provided with a linear guide rail arranged along the axial direction. A transmission ball is provided between the inner component and the outer component, and the transmission ball slides between the linear guide rail and the arc-shaped guide rail simultaneously.

9. The nail grinder as described in claim 8, characterized in that: The transmission shaft sleeve is provided with a rolling track at its center, and the transmission ball moves on the rolling track.

10. The nail grinder as described in claim 9, characterized in that: The elastic component includes a first elastic element and a second elastic element. The first elastic element is sleeved on the slidable output shaft, and its two ends respectively abut against the slidable output shaft and the fixed sleeve. The second elastic element is sleeved on the output shaft sleeve, and its two ends respectively abut against the transmission shaft sleeve and the transmission component.

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