A screwdriver with magnetic attraction structure

Abstract

The application belongs to the technical field of screwdrivers, and discloses a screwdriver with a magnetic attraction structure, which comprises a shank, a magnetic attraction mounting structure assembled below the shank, and a handle located above the shank, a cavity is formed in the center of the inner wall of the handle, an auxiliary guide structure is arranged at the inside of the cavity and the outside of the handle, the magnetic attraction mounting structure comprises a fixing sleeve, a plug-in rod inserted into the inner wall of the fixing sleeve, and a return spring assembled to the inner wall of the plug-in rod, through the design of the magnetic attraction mounting structure, when the mounting is performed, an operator holds the magnetic attraction head assembly, inserts the plug-in rod of the magnetic attraction head assembly into the inner wall of the fixing sleeve, in the process of insertion, the two abutting blocks on the plug-in rod abut against the inner wall of the fixing sleeve, the preliminary fixing of the guide column and the bottom powerful magnet is completed, the horizontal shaking and displacement are effectively limited, a stable foundation is laid for subsequent operation, then, the locking ring is moved downward along the outer wall of the fixing sleeve to the bottom, and the final fixing of the plug-in rod is realized.

Description

Technical Field

[0001] This invention belongs to the field of screwdriver technology, specifically a screwdriver with a magnetic attraction structure. Background Technology

[0002] Screwdrivers are an extremely common and indispensable hand tool in many areas of modern industry and daily life, widely used in various scenarios such as electronic equipment repair, furniture assembly, and mechanical assembly. Traditional screwdrivers mainly consist of a handle and a cutting head, with a relatively simple structure and limited functionality. During use, especially in delicate tasks such as installing and removing tiny screws inside electronic products, they often present numerous inconveniences. The emergence of magnetic screwdrivers aims to solve these problems. Their basic principle involves embedding a magnet in the handle or cutting head, or using electromagnetic induction to generate magnetic force. This magnetic structure allows the screwdriver to quickly attract and grasp screws when they approach them, achieving rapid positioning and gripping. For example, in mobile phone repair, technicians can easily remove tiny screws using a magnetic screwdriver. The magnetic screwdriver adheres to the screwdriver head, accurately installing it into the corresponding position, greatly improving the convenience and accuracy of operation. On industrial production lines, magnetic screwdrivers can effectively prevent screws from falling off during assembly, reducing production line downtime caused by lost or improperly installed screws, and improving production efficiency and product quality. With the continuous advancement of technology and the increasing demands for precision and efficiency in industrial production and daily life, magnetic screwdrivers, with their unique advantages, have gradually become an important innovation and development direction in the screwdriver field, meeting the higher performance requirements of different users under various complex working conditions. Existing screwdrivers with magnetic structures: The existing devices mostly use magnetic attraction to fix the screwdriver to the magnetic structure. This method has revealed many defects in practical applications. Its stability is poor. When subjected to large rotational forces, such as when disassembling or installing some screws with high tightness, the connection between the magnetic structure and the screwdriver is very easy to detach because it only relies on magnetic attraction and lacks a more stable mechanical connection structure. This not only interrupts the current operation process, but may also damage the screw or magnetic components. In addition, relying solely on manual force is limited and it is difficult to output a sufficiently large torque continuously and stably. At the same time, since there is no auxiliary device to enhance the rotation efficiency of the screwdriver, the operator will feel extremely tired during the operation, often requiring a lot of time and energy. It may even lead to hand fatigue, injury, or screwdriver slippage due to excessive force, further damaging the workpiece surface or screw slot. Summary of the Invention

[0003] To address the problems mentioned in the background art and to achieve the above objectives, the present invention provides the following technical solution: a screwdriver with a magnetic suction structure, comprising a shank and a magnetic suction mounting structure mounted below the shank, and a handle located above the shank, wherein a cavity is provided in the center of the inner wall of the handle, and an auxiliary guide structure is provided inside the cavity and outside the handle; The magnetic mounting structure includes a fixing sleeve and a plug rod inserted into the inner wall of the fixing sleeve, and a return spring assembled on the inner wall of the plug rod. A receiving plate is fixedly connected to the end of the return spring away from the inner wall of the plug rod, and a connecting rod is fixedly connected to the end of the receiving plate away from the return spring. Two grooves are formed on the inner wall of the connecting rod, and a receiving block is rotatably connected to the inner wall of the grooves via a shaft. Two rectangular slots for the movement of the receiving blocks are formed on the outer wall of the plug rod, and a threaded groove is formed on the outer wall of the plug rod below the rectangular slots. A locking ring is threadedly connected to the inner wall of the threaded groove.

[0004] Preferably, the cavity has circular grooves on both sides for placing the disassembly screws, a magnetic sleeve is installed on the inner wall of the circular groove, and the inner wall of the magnetic sleeve has placement holes arranged in a circular array. Protective caps are rotatably connected to both ends of the handle.

[0005] Preferably, the outer wall of the handle is fitted with a rubber sleeve and the outer wall of the blade is coated with an antistatic coating.

[0006] Preferably, the auxiliary guide structure includes a drive wheel fixedly connected to the top of the tool holder and two symmetrically distributed transmission wheels meshing with the outer wall of the drive wheel. A worm is fixedly connected to the side of one of the transmission wheels away from the other, and a worm wheel meshes with the outer wall of the worm.

[0007] Preferably, a motor is fixedly connected to the other end of the worm gear, a rotating rod is fixedly connected to the other end of the transmission wheel, and a turntable is fixedly connected to the other end of the rotating rod.

[0008] Preferably, two protective chambers for protecting the worm, worm wheel, and rotating rod are provided on the left and right sides of the outer wall of the handle.

[0009] Preferably, a through hole adapted to the knife handle is provided on the inner wall of the knife handle and below the cavity. A ball bearing is installed inside the through hole, and the knife handle is rotatably connected to the inner wall of the through hole through the ball bearing.

[0010] Preferably, a guide post is fixedly connected to the bottom of the plug rod, and an annular groove and a cylindrical groove are provided on the inner wall of the guide post, with a strong magnet installed on the inner wall of both the annular groove and the cylindrical groove.

[0011] Preferably, the plug rod is inserted into the inner wall of the fixed sleeve and locked to the bottom of the fixed sleeve by a locking ring.

[0012] Preferably, when the motor starts, it can drive the worm to rotate, and the worm can drive the worm wheel to rotate. The meshing relationship between the worm and the worm wheel can achieve a self-locking effect.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a magnetic installation structure. During installation, the operator holds the magnetic head assembly, aligns its connector with the inner wall of the fixing sleeve, and inserts it. During insertion, two abutment blocks on the connector abut against the inner wall of the fixing sleeve, initially fixing the guide post and the bottom strong magnet, effectively limiting horizontal swaying and displacement, laying a stable foundation for subsequent operations. Next, the locking ring is moved down along the outer wall of the fixing sleeve to the bottom, achieving final fixing of the connector. This dual fixing method ensures strong stability of the magnetic head assembly after installation. Even under external impact, vibration, or tilting, it maintains accurate positioning and structural integrity, guaranteeing reliable operation under complex working conditions. When replacing the magnetic head, the new magnetic head is inserted along the axis of the guide post. During insertion, the two strong magnets inside the guide post and the internal components of the magnetic head generate magnetic attraction, guiding the magnetic head quickly into place and firmly fixing it. The magnetic force of the strong magnets can resist minor external interference, such as collisions and vibrations, ensuring the stability and reliability of the magnetic head after replacement.

[0014] This invention, through the design of an auxiliary guiding structure, enables a motor to start, whose output shaft rotates to drive a worm gear. The worm gear, with its helical teeth, drives a meshing worm wheel and two driven wheels to rotate. The driven wheels transmit power to the driving wheel, causing the connected tool holder to rotate accordingly. During this process, the auxiliary guiding structure, with its carefully designed tooth profile, shaft spacing, and reasonable assembly tolerances, ensures smooth power transmission from the motor to the tool holder, providing stable guidance for rotation. In machining or electronic equipment maintenance, this effectively prevents tool holder misalignment and wobbling, improving work quality and efficiency. The self-locking characteristics of the worm wheel and worm gear transmission are significant. In scenarios involving manual and electric operation switching or unidirectional tool holder rotation, the self-locking effect allows the tool holder to remain stationary while other components are manually rotated, thus achieving efficient and stable transmission and operation through the auxiliary guiding structure.

[0015] This invention employs a circular groove design to facilitate screw loading and unloading. During screw loading and unloading, the inner circular groove of the magnetic sleeve plays a crucial role. Its shape and size are adapted to common screw specifications, making it easy to place the screw within and maintain its stability. The magnetic force of the sleeve, combined with the force of the circular groove, attracts the screw, significantly reducing the risk of screws falling or being lost during operation. Due to the limiting effect of the circular groove, the screw is more firmly attracted by the magnetic force. Even in complex environments, such as narrow spaces, limited operating angles, or vibration interference, the screw will not fall due to insufficient magnetic attraction. This allows operators to focus on loading and unloading, improving work efficiency and reducing problems such as time-consuming searches and equipment malfunctions caused by fallen screws. It provides a more stable and efficient method for screw handling tasks such as assembly and maintenance. Attached Figure Description

[0016] Figure 1 This is a first-view schematic diagram of the overall structure of the present invention; Figure 2 This is a second-view schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the knife handle structure of the present invention; Figure 4 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 5 This is a front view structural diagram of the present invention; Figure 6 This is a schematic diagram of the tool holder and magnetic mounting structure of the present invention; Figure 7 This is a schematic diagram of the magnetic mounting structure of the present invention.

[0017] In the diagram: 1. Tool holder; 2. Magnetic mounting structure; 21. Fixing sleeve; 22. Insertion rod; 221. Guide post; 222. Strong magnet; 23. Return spring; 24. Abutment plate; 25. Connecting rod; 26. Abutment block; 27. Locking ring; 3. Tool handle; 31. Magnetic sleeve; 32. Protective cover; 33. Rubber sleeve; 34. Ball bearing; 35. Protective chamber; 4. Auxiliary guide structure; 41. Drive wheel; 42. Transmission wheel; 43. Worm gear; 44. Worm wheel; 45. Motor; 46. Rotating rod; 47. Turntable. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 7As shown, the present invention provides a screwdriver with a magnetic suction structure, including a screwdriver 1 and a magnetic suction mounting structure 2 assembled below the screwdriver 1, and a handle 3 located above the screwdriver 1. A cavity is provided in the center of the inner wall of the handle 3, and an auxiliary guide structure 4 is provided inside the cavity and outside the handle 3. The magnetic mounting structure 2 includes a fixed sleeve 21 and a plug rod 22 inserted into the inner wall of the fixed sleeve 21, and a return spring 23 assembled on the inner wall of the plug rod 22. A stop plate 24 is fixedly connected to the end of the return spring 23 away from the inner wall of the plug rod 22. A connecting rod 25 is fixedly connected to the end of the stop plate 24 away from the return spring 23. Two grooves are opened on the inner wall of the connecting rod 25. A stop block 26 is rotatably connected to the inner wall of the grooves through a shaft. Two rectangular grooves for the movement of the stop block 26 are opened on the outer wall of the plug rod 22. A threaded groove is opened on the outer wall of the plug rod 22 below the rectangular groove. A locking ring 27 is threadedly connected to the inner wall of the threaded groove.

[0020] The above solution employs a magnetic installation structure 2. During installation, the operator holds the magnetic head assembly and inserts the connector rod 22 into the inner wall of the fixing sleeve 21. During insertion, the two abutment blocks 26 on the connector rod 22 abut against the inner wall of the fixing sleeve 21, initially fixing the guide post 221 and the bottom strong magnet 222, effectively limiting horizontal swaying and displacement, and laying a stable foundation for subsequent operations. Then, the locking ring 27 is moved down along the outer wall of the fixing sleeve 21 to the bottom, achieving final fixing of the connector rod 22. This double-layered installation... The fixing method ensures strong stability of the magnetic head assembly after installation. Even under external impact, vibration or tilt, it can maintain accurate position and structural integrity, ensuring reliable operation under complex working conditions. When replacing the magnetic head, insert the new magnetic head along the axis of the guide post 221. When inserted, the two strong magnets 222 inside the guide post 221 generate magnetic attraction with the internal components of the magnetic head, guiding the magnetic head to quickly enter position and be firmly fixed. The magnetic force of the strong magnets 222 can resist minor external interference, such as collisions and vibrations, ensuring the stability and reliability of the magnetic head after replacement.

[0021] like Figures 1 to 7 As shown, circular grooves for placing disassembly screws are provided on both sides of the cavity. Magnetic sleeves 31 are installed on the inner walls of the circular grooves. Placement holes arranged in a circular array are provided on the inner walls of the magnetic sleeves 31. Protective covers 32 are rotatably connected to both ends of the handle 3. Rubber sleeves 33 are fitted on the outer walls of the handle 3, and an antistatic coating is sprayed on the outer walls of the handle 1. The auxiliary guide structure 4 includes a drive wheel 41 fixedly connected to the top of the handle 1 and two symmetrically distributed transmission wheels 42 meshing with the outer walls of the drive wheel 41. A worm gear 43 is fixedly connected to the side of one of the transmission wheels 42 away from the other. A worm wheel 44 is meshed with the outer wall of the worm gear 43.

[0022] The above solution employs an auxiliary guide structure 4. The output shaft of the starter motor 45 rotates, driving the worm gear 43 to rotate. The worm gear 43, with its helical gear structure, drives the meshing worm wheel 44 and two driven wheels to rotate. The driven wheels transmit power to the drive wheel 41, causing the connected tool holder 1 to rotate accordingly. During this process, the auxiliary guide structure 4, with its carefully designed tooth profile, shaft spacing, and reasonable assembly tolerances, ensures smooth power transmission from the motor 45 to the tool holder 1, providing stable guidance for rotation. In machining or electronic equipment maintenance, this effectively prevents the tool holder 1 from shifting or wobbling, improving work quality and efficiency. The self-locking characteristic of the worm wheel 44 and worm gear 43 is significant. For scenarios involving manual and electric operation switching or unidirectional rotation of the tool holder 1, the self-locking effect allows the tool holder 1 to remain stationary while other components are manually rotated, thus achieving efficient and stable transmission and operation with the aid of the auxiliary guide structure 4.

[0023] like Figures 1 to 7 As shown, a motor 45 is fixedly connected to the other end of the worm gear 43, and a rotating rod 46 is fixedly connected to the other end of the other transmission wheel 42. A turntable 47 is fixedly connected to the other end of the rotating rod 46. Two protective chambers 35 are provided on the left and right sides of the outer wall of the handle 3 to protect the worm gear 43, the worm wheel 44 and the rotating rod 46. A through hole adapted to the tool holder 1 is opened on the inner wall of the handle 3 and below the cavity. A ball bearing 34 is installed inside the through hole. The tool holder 1 is rotatably connected to the inner wall of the through hole through the ball bearing 34.

[0024] The above solution employs a circular groove design to facilitate screw loading and unloading. During screw loading and unloading, the inner circular groove of the magnetic sleeve 31 comes into play. Its shape and size are adapted to common screw specifications, making it easy to place the screw inside and keep it stable. The magnetic force of the magnetic sleeve 31, combined with the force of the circular groove, attracts the screw, greatly reducing the risk of screws falling or being lost during operation. Due to the limiting effect of the circular groove, the screw is more firmly attracted by the magnetic force. Even in complex environments, such as narrow spaces, limited operating angles, or vibration interference, the screw will not fall due to insufficient magnetic attraction. As a result, operators can focus on loading and unloading, improving work efficiency and reducing problems such as time-consuming searches and equipment malfunctions caused by fallen screws. This provides a more stable and efficient method for screw operations such as assembly and maintenance.

[0025] like Figures 1 to 7 As shown, a guide post 221 is fixedly connected to the bottom of the plug rod 22. The inner wall of the guide post 221 is provided with an annular groove and a cylindrical groove, and a strong magnet 222 is installed on the inner wall of both the annular groove and the cylindrical groove. The plug rod 22 is inserted into the inner wall of the fixed sleeve 21 and locked to the bottom of the fixed sleeve 21 by the locking ring 27. When the motor 45 is started, it can drive the worm 43 to rotate, and the worm 43 can drive the worm wheel 44 to rotate. The self-locking effect can be achieved through the meshing relationship between the worm 43 and the worm wheel 44.

[0026] The above-mentioned scheme is adopted: In the design of this device, the inner wall of the guide post 221 is carefully set with annular grooves and cylindrical grooves, and powerful magnets 222 are installed in these grooves. When the insertion rod 22 is accurately inserted into the inner wall of the fixed sleeve 21, a tight locking connection is achieved below the fixed sleeve 21 by means of the locking ring 27. The start of the motor 45 is the starting point of a series of actions. Once the motor 45 starts, it will drive the worm 43 to start rotating. Due to the special meshing relationship between the worm 43 and the worm wheel 44, the worm 43 can effectively drive the worm wheel 44 to rotate. The self-locking characteristic of this meshing relationship is a major highlight. It enables the device to automatically lock after operating to a specific state or completing a specific task. To ensure the device remains in its current position and prevent unnecessary displacement or misoperation due to external interference or other factors, the presence of the powerful magnet 222 further enhances the stability and functionality of the device. In certain working scenarios, when it is necessary to ensure a more secure connection between the plug rod 22 and the fixed sleeve 21, or when precise adsorption and positioning are required at a specific location, the powerful magnet 222 can play a significant role. It can generate sufficiently strong magnetic force to tightly attract the relevant components together, reducing the loosening of connections or positional deviations that may be caused by vibration, shaking, or other factors. This ensures the reliable operation of the entire device in complex working environments, improves work efficiency and accuracy, and provides a solid foundation for the stable operation of the entire system.

[0027] Working principle and usage process of this invention: Prepare the magnetic chuck assembly and slowly insert it by aligning the plug rod 22 with the inner wall of the fixing sleeve 21. During this process, the two abutment blocks 26 on the plug rod 22 will contact the inner wall of the fixing sleeve 21, thereby initially fixing the guide post 221 and the strong magnet 222 at the bottom, effectively suppressing horizontal shaking and displacement, and providing a stable foundation for subsequent precise installation. Select the locking ring 27 and move it down along the outer wall of the fixing sleeve 21 to the bottom position to achieve the final and stable fixation of the plug rod 22. Through this double fixing method, even if the screwdriver is subjected to external impact, vibration or tilt, the magnetic chuck assembly can still maintain accurate positioning and structural integrity, ensuring reliable operation under complex working conditions. If the manual operation mode is used, the operator directly holds the handle. 3. The screw shank 1 is used for screw loading and unloading operations. The anti-static coating on the outer wall of the screw shank 1 effectively prevents static electricity from damaging electronic equipment. When electric operation is required, the motor 45 is started, and the output shaft of the motor 45 begins to rotate, driving the worm gear 43 to rotate. The helical tooth structure of the worm gear 43 drives the meshing worm wheel 44 and the two transmission wheels 42 to rotate synchronously. The transmission wheels 42 transmit power to the drive wheel 41, which in turn causes the connected screw shank 1 to rotate. During this power transmission process, the auxiliary guide structure 4, with its carefully designed tooth profile, reasonable shaft spacing, and strictly controlled assembly tolerances, ensures that power is smoothly and stably transmitted from the motor 45 to the screw shank 1, providing precise guidance for the rotation of the screw shank 1 and effectively preventing mechanical damage. During machining or electronic equipment repair, misalignment and wobbling may occur. Simultaneously, the self-locking characteristics of the worm gear 44 and worm 43 play a crucial role. In scenarios involving manual / electric operation switching or unidirectional rotation of the tool holder 1, due to the self-locking effect, the tool holder 1 remains stationary when other components are manually rotated. This allows for efficient and stable transmission and operation with the aid of the auxiliary guide structure 4. During screw loading and unloading, screws to be used or already removed can be placed in the circular grooves on both sides of the cavity of the tool holder 3. The magnetic sleeves 31 on the inner wall of the grooves use their magnetic force to attract the screws. Due to the limiting effect of the circular grooves, the screws are more securely placed within the magnetic sleeves 31. Even in complex environments such as confined spaces, limited operating angles, or vibration interference, it effectively prevents screws from shifting due to insufficient magnetic force. This design significantly reduces the risk of screws falling out or being lost, allowing operators to focus on screw installation and removal, reducing time spent searching for lost screws, and preventing screws from falling into equipment and causing malfunctions. It provides a more stable and efficient solution for assembly, maintenance, and other screw-related tasks. When replacing the magnetic chuck, the new magnetic chuck is inserted along the axis of the guide post 221. During insertion, the powerful magnets 222 in the annular and cylindrical grooves on the inner wall of the guide post 221 generate a magnetic attraction with the internal components of the magnetic chuck, guiding the magnetic chuck into position quickly and accurately and securing it firmly. The magnetic force of the powerful magnets 222 effectively resists minor external forces such as collisions and vibrations, ensuring the stability and reliability of the replaced magnetic chuck.This ensures the screwdriver can work continuously and stably.

[0028] 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 process, method, article, or apparatus.

[0029] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screwdriver with a magnetic attraction structure, characterized in that: It includes a tool holder (1) and a magnetic mounting structure (2) assembled below the tool holder (1), and a tool handle (3) located above the tool holder (1). A cavity is provided in the center of the inner wall of the tool handle (3), and an auxiliary guide structure (4) is provided inside the cavity and outside the tool handle (3). The magnetic mounting structure (2) includes a fixed sleeve (21) and a plug rod (22) inserted into the inner wall of the fixed sleeve (21), and a return spring (23) assembled on the inner wall of the plug rod (22). The end of the return spring (23) away from the inner wall of the plug rod (22) is fixedly connected to an abutment plate (24). The end of the abutment plate (24) away from the return spring (23) is fixedly connected to a connecting rod (25). The inner wall of the connecting rod (25) has two grooves. The inner wall of the grooves is rotatably connected to an abutment block (26) via a shaft. The outer wall of the plug rod (22) has two rectangular slots for the movement of the abutment block (26), and the outer wall of the plug rod (22) is provided with a threaded groove located below the rectangular slot. The inner wall of the threaded groove is threadedly connected to a locking ring (27).

2. A screwdriver with a magnetic suction structure according to claim 1, characterized in that: The cavity has circular grooves on both sides for placing the disassembly screws. A magnetic sleeve (31) is installed on the inner wall of the circular groove. The magnetic sleeve (31) has placement holes arranged in a circular array on its inner wall. Protective covers (32) are rotatably connected to both ends of the handle (3).

3. A screwdriver with a magnetic suction structure according to claim 1, characterized in that: The outer wall of the handle (3) is fitted with a rubber sleeve (33) and the outer wall of the blade (1) is coated with an antistatic coating.

4. A screwdriver with a magnetic suction structure according to claim 1, characterized in that: The auxiliary guide structure (4) includes a drive wheel (41) fixedly connected to the top of the tool holder (1) and two symmetrically distributed transmission wheels (42) meshing with the outer wall of the drive wheel (41). One of the transmission wheels (42) is fixedly connected to a worm (43) on the side away from the other, and a worm wheel (44) meshes with the outer wall of the worm (43).

5. A screwdriver with a magnetic suction structure according to claim 4, characterized in that: The other end of the worm (43) is fixedly connected to a motor (45), and the other end of the transmission wheel (42) is fixedly connected to a rotating rod (46), and the other end of the rotating rod (46) is fixedly connected to a turntable (47).

6. A screwdriver with a magnetic suction structure according to claim 4, characterized in that: Two protective chambers (35) are provided on the left and right sides of the outer wall of the handle (3) to protect the worm (43), worm wheel (44) and rotating rod (46).

7. A screwdriver with a magnetic suction structure according to claim 1, characterized in that: The inner wall of the handle (3) and below the cavity is provided with a through hole that is compatible with the handle (1). A ball bearing (34) is installed inside the through hole, and the handle (1) is rotatably connected to the inner wall of the through hole through the ball bearing (34).

8. A screwdriver with a magnetic suction structure according to claim 1, characterized in that: The bottom of the plug rod (22) is fixedly connected to a guide post (221). The inner wall of the guide post (221) is provided with an annular groove and a cylindrical groove, and a strong magnet (222) is installed on the inner wall of both the annular groove and the cylindrical groove.

9. A screwdriver with a magnetic suction structure according to claim 1, characterized in that: The plug rod (22) is inserted into the inner wall of the fixed sleeve (21) and locked to the bottom of the fixed sleeve (21) by the locking ring (27).

10. A screwdriver with a magnetic suction structure according to claim 5, characterized in that: When the motor (45) is started, it can drive the worm (43) to rotate, and the worm (43) can drive the worm wheel (44) to rotate. The self-locking effect can be achieved through the meshing relationship between the worm (43) and the worm wheel (44).

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