Electric screwdriver and bit changing method for facilitating unlocking

Abstract

The application relates to a power screwdriver facilitating unlocking and a bit replacement method, and relates to the technical field of power screwdrivers. The power screwdriver facilitating unlocking comprises a machine body, a connecting sleeve, a bit and a locking device. The locking device comprises a magnetic rod which is arranged on the machine body in a sliding mode along a direction close to or far away from the connecting sleeve, extends into the connecting sleeve and is used for adsorbing and positioning the bit. A driving mechanism is used for driving the magnetic rod to move and realize adsorbing positioning or separation of the magnetic rod and the bit. The driving mechanism drives the magnetic rod to separate from the connecting part, the bit is removed, then the driving mechanism drives the magnetic rod to move back to the original position, the connecting part of a new bit is inserted and installed on the connecting sleeve, and the magnetic rod is used for adsorbing and positioning the connecting part, so that the stability during use of the bit and the convenience during replacement of the bit can be improved simultaneously.

Description

Technical Field

[0001] This application relates to the technical field of electric screwdrivers, and in particular to an electric screwdriver and a method for changing the bit that facilitates unlocking. Background Technology

[0002] Electric screwdrivers are the most commonly used power tools in home improvement. When assembling screws, we use various types of screwdriver bits, such as Phillips screwdriver bits, flathead screwdriver bits, hex screwdriver bits, Torx screwdriver bits, etc.

[0003] The electric thread cutter body has a rotatable connecting sleeve, and the bit has a connecting part that fits into the connecting sleeve. The connecting sleeve contains a magnetic element. When the connecting part is inserted into the connecting sleeve, the bit is positioned against the connecting sleeve, and the magnetic element is attracted to the connecting part for positioning.

[0004] Positioning is achieved through a magnetic component and a connecting part. Since the magnetic component is located inside the connecting sleeve, the bit needs to be pulled to overcome the magnetic force when removing it, causing the connecting part to detach from the magnetic component. Therefore, to improve the stability of the bit during use, the magnetic force on the connecting part needs to be relatively large, which makes removing the bit more troublesome. Conversely, reducing the magnetic force on the connecting part to facilitate the removal of the bit reduces the stability of the bit during use, making it impossible to achieve both goals simultaneously. Summary of the Invention

[0005] To simultaneously improve the stability of the screwdriver bit during use and the convenience of changing the bit, this application provides an electric screwdriver with easy unlocking and a method for changing the bit.

[0006] Firstly, this application provides an electric screwdriver that facilitates unlocking, employing the following technical solution: An easy-to-unlock electric screwdriver includes a body, a connecting sleeve rotatably mounted on the body, a screwdriver bit inserted into the connecting sleeve, and a locking device for locking the screwdriver bit, the locking device comprising: A magnetic rod is slidably mounted on the machine body in the direction of approaching or moving away from the connecting sleeve and extends into the connecting sleeve to attract and position the bit. The drive mechanism is used to drive the magnetic rod to move and to achieve the magnetic rod's adsorption and positioning or detachment from the bit.

[0007] By adopting the above technical solution, the connecting part is inserted and installed onto the connecting sleeve, so that the connecting part abuts against the magnetic rod. The magnetic rod is used to attract and position the connecting part. When it is necessary to remove the bit, the drive mechanism drives the magnetic rod to move away from the bit, so that the magnetic rod disengages from the connecting part, and then the bit can be removed. Then, the drive mechanism drives the magnetic rod to move back to its original position, and then the connecting part of the new bit is inserted and installed onto the connecting sleeve. Since the magnetic rod is used to attract and position the connecting part, the attraction force of the magnetic rod on the connecting part can be improved. At the same time, the drive mechanism drives the magnetic rod to disengage from the connecting part, thus improving both the stability of the bit during use and the convenience of bit replacement.

[0008] Optionally, a locking hole is provided on the body, and the driving mechanism includes: The sliding frame is slidably mounted on the machine body in the direction of approaching or moving away from the connecting sleeve and is connected to the magnetic rod; An elastic locking component is installed on the sliding frame and is positioned by inserting into the locking hole under the action of elastic force; The push block is slidably mounted on the machine body and abuts against the sliding frame to push the sliding frame to move. When the magnetic rod is connected to the connecting part, the push block presses against the elastic locking component and is used to prevent the elastic locking component from disengaging from the locking hole. A pusher component, used to drive the pusher block to move.

[0009] By adopting the above technical solution, the pusher component starts to drive the pusher block to move. The pusher block first disengages from the elastic locking component, allowing the elastic locking component to move elastically. The pusher block moves and drives the sliding frame and the elastic locking component to move. The elastic locking component can move and disengage from the locking hole under the action of extrusion force. At the same time, the sliding frame moves, which drives the magnetic rod to disengage from the connecting part. The elastic locking component can press against the machine body for positioning under the action of elastic force. At this time, the bit can be removed, reducing the probability of the magnetic rod moving back when changing the bit and improving the convenience of changing the bit.

[0010] The pushing component pushes the pushing block back, which in turn pushes the elastic locking component and the sliding frame back simultaneously. This causes the elastic locking component to be squeezed and moved to the locking hole. Under the action of elastic force, the elastic locking component is inserted and installed in the locking hole, while the pushing block presses against the elastic locking component for positioning. The pushing component is used to position the pushing block, causing the magnetic rod to move back to its original position. Therefore, the positioning by the pushing block can prevent the elastic locking component from coming out of the locking hole, thus improving the stability of the magnetic rod. Therefore, the elastic force of the elastic locking component does not need to be designed to be large, which reduces the amount of force required to drive the magnetic rod to disengage from the connecting part, thereby improving the convenience and stability of driving the magnetic rod to move. Thus, it can simultaneously improve the stability of the bit during use and the convenience of changing the bit.

[0011] Optionally, the push block has a locking groove, and the elastic locking component includes: The sliding component is slidably mounted on the sliding frame in a direction that is close to or away from the push block, and the sliding direction is perpendicular to the sliding direction of the magnetic rod. An elastic element is provided on the sliding element. When the magnetic rod needs to be connected to the bit, the sliding element is inserted into the locking hole and locking groove for positioning under the action of elastic force.

[0012] By adopting the above technical solution, the pusher block is driven to move, causing the sliding component to disengage from the locking groove. As a result, the pusher block moves away from the sliding component and closer to the sliding frame. The pusher block pushes the sliding frame and the magnetic rod to move, so that the sliding component can disengage from the locking hole after being subjected to pressure, thereby unlocking the sliding frame and the magnetic rod. This allows the magnetic rod to disengage from the connecting part. Then, the elastic component pushes the sliding component to press against the machine body to position the sliding frame and the magnetic rod, making it easy to remove the bit.

[0013] The pusher component drives the pusher block to move back, which in turn drives the sliding component, sliding frame, and magnetic rod closer to the connecting sleeve. This causes the sliding component to slide and install into the locking hole. Under the action of the elastic component, the sliding component is inserted and installed into the locking hole. The pusher block continues to move, pushing the sliding component to move on the locking hole, so that the locking groove is close to the sliding component. Under the action of the elastic component, the sliding component is inserted and installed into the locking groove. Thus, the sliding component is inserted and installed in the locking hole and the locking groove. Moreover, the sliding direction of the magnetic rod is perpendicular to the sliding direction of the sliding component. That is, the direction of the impact force on the magnetic rod is perpendicular to the direction of the force required to unlock the sliding component. Therefore, only a small amount of elastic force from the elastic component is needed to achieve a large positioning effect on the magnetic rod, thereby further reducing the amount of force required for the pusher component to drive the pusher block to move and improving the convenience of operation. Therefore, it can simultaneously improve the stability of the bit during use and the convenience of bit replacement.

[0014] Optionally, the sliding frame has a fixing hole, a fixing piece is inserted into the fixing hole, and the fixing piece has a sliding hole. The sliding component includes: The sliding rod is slidably mounted on the sliding hole in a direction close to or away from the push block, and its two ends extend to the sides of the fixing plate close to the push block and the locking hole; An arc-shaped block is positioned at the end of the sliding rod closest to the push block; A plug-in block is detachably mounted on the end of the sliding rod near the locking hole. Both the arc-shaped block and the plug-in block are slidably mounted on the fixing hole. The elastic element is sleeved on the sliding rod and passes through the sliding hole. The elastic element is tower-shaped, and the diameter of the end near the plug-in block is larger than the diameter of the end near the arc-shaped block. The width of the sliding hole is smaller than the maximum diameter of the elastic element but larger than the minimum diameter of the elastic element, and only allows part of the elastic element to pass through. The two ends of the elastic element press against the arc-shaped block and the plug-in block, so that the plug-in block and the arc-shaped block are respectively inserted into the locking hole and the locking groove for positioning.

[0015] By adopting the above technical solution, the elastic component can be replaced by removing the fixing plate from the fixing hole and then disassembling the plug block from the sliding rod. At the same time, the damaged structure in the sliding component can also be replaced, thereby improving the convenience of replacing the sliding component and the elastic component.

[0016] The plug-in block and the arc-shaped block are respectively set to the locking hole and the latching slot, and the fixing plate separates the plug-in block and the arc-shaped block into two different areas. The plug-in block is located on the side of the fixing plate near the locking hole, while the arc-shaped block is located on the side of the fixing plate near the push block. This allows the plug-in block to slide on the fixing hole on the side of the fixing plate near the locking hole, and the arc-shaped block to slide on the fixing hole on the side of the fixing plate near the push block. This makes it easy for the plug-in block to be inserted into the locking hole and for the arc-shaped block to be inserted into the locking slot. At the same time, both can make slight movements on the fixing hole, which facilitates subsequent unlocking.

[0017] The movement of the push block will push both the plug block and the arc block closer to the locking hole and away from the locking groove. At the same time, the elastic element passes through the sliding hole and approaches the locking hole, reducing the force of the arc block on the push block, making it easier for the push block to disengage from the arc block. Moreover, the plug block approaching the locking hole will only make the locking effect on the magnetic rod better.

[0018] Simultaneously, when the plug-in block disengages from the locking hole and presses against the machine body, it pushes both the plug-in block and the arc-shaped block closer to the push block. The elastic element also passes through the sliding hole and approaches the push block. At this time, because the elastic element is tower-shaped, some of it cannot pass through and pushes the plug-in block against the machine body, thereby positioning the magnetic rod. The push block also pushes the arc-shaped block and the sliding frame to move. Since the pushing force is perpendicular to the sliding direction of the plug-in block, the pushing force will not increase the friction between the plug-in block and the machine body. Moreover, some of the elastic elements move to the side of the fixing plate closer to the push block, reducing the friction between the plug-in block and the machine body. This greatly improves the convenience of pushing the plug-in block into the locking hole. When the plug-in block is inserted into the locking hole, some of the elastic elements also pass through the sliding hole, thus avoiding the push block and providing a positioning effect for the locking block, thereby improving the convenience of the pushing process. It also improves the stability of the bit during use and the convenience of changing the bit.

[0019] Optionally, the push block has an inclined guide surface, the distance between the end of the guide surface near the connecting sleeve and the sliding member is smaller than the distance between the end of the guide surface away from the connecting sleeve and the sliding member, and it is convenient for the sliding member to be inserted and positioned on the locking groove.

[0020] By adopting the above technical solution, the guide surface can more easily push the arc-shaped block and detach from it, improving the convenience of the operation process.

[0021] Optionally, the pushing component includes: The push cover is slidably mounted on the machine body, and the push block is mounted on the push cover; The snap-fit ​​block is set on the push cover and inserted into the body for positioning.

[0022] By adopting the above technical solution, the push cover moves to drive the push block. When the push block drives the sliding frame and magnetic rod away from the connecting sleeve, the elastic locking component presses against the machine body, generating a large resistance. At this point, the magnetic rod disengages from the connecting part, and the bit can be removed. Then, the push cover moves back, allowing the elastic locking component to be inserted and installed in the locking hole. The push block, sliding frame, and magnetic rod move back to their original positions, and the locking block is locked onto the machine body to position the push block. Moreover, the larger outer shell push cover drives the movement of the push block inside the machine body, thereby improving the convenience of operation.

[0023] Optionally, the connecting sleeve is provided with an insertion groove that engages with the bit and allows the bit and the connecting sleeve to rotate simultaneously. The magnetic rod engages with the insertion groove and has a circular connecting groove at one end near the sliding frame. The sliding frame is provided with a connecting ring that engages with the connecting groove. The machine body is provided with a rotating assembly that drives the magnetic rod to rotate.

[0024] By adopting the above technical solution, one end of the magnetic rod is inserted into the insertion slot and can slide in the insertion slot, which can support one end of the magnetic rod. The other end of the magnetic rod is rotatably connected to the sliding frame through the connecting ring, thereby supporting the other end of the magnetic rod and improving the stability of the magnetic rod during operation. At the same time, the rotating component is used to drive the magnetic rod to rotate. The rotating component is located in the middle of the magnetic rod. The rotation of the magnetic rod drives the connecting sleeve, the connecting part and the bit to rotate, making the electric screwdriver structure more compact and stable.

[0025] Optionally, the rotating assembly includes: The main gear is rotatably mounted on the machine body, and the magnetic rod slides through the main gear and rotates simultaneously with the main gear. The driving components are mounted on the machine body; The auxiliary gear is rotatably mounted on the machine body and meshes with the main gear, connecting to the drive component.

[0026] By adopting the above technical solution, the driving component drives the secondary gear to rotate, and the rotation of the secondary gear drives the main gear and the magnetic rod to rotate. Moreover, the movement of the magnetic rod does not drive the main gear to move, thereby improving the stability of operation while driving the magnetic rod to rotate.

[0027] Optionally, the sliding frame is provided with a force-shaping pin that abuts against the end of the magnetic rod away from the connecting sleeve to provide a supporting force.

[0028] By adopting the above technical solution, the magnetic rod will be subjected to compressive force concentrated at the connecting ring, which will make the connecting ring more susceptible to damage due to the large force. Therefore, the force distribution pin is used to abut against the magnetic rod for positioning, which reduces the force on the connecting ring and improves the stability of the electric screwdriver during transportation.

[0029] Secondly, this application provides a bit replacement method, which adopts the following technical solution: A method for changing a screwdriver bit includes the following steps: Unlock: Pull the push cover to disengage the push block from the sliding component; Movement: Pulling the push cover drives the push block to abut against the sliding frame, pushing the sliding frame causes the sliding part to disengage from the locking hole and press against the machine body for positioning; Remove the bit; Return: Pushing the push cover drives the sliding frame to return, so that the sliding component can be inserted and installed into the locking hole and locking groove for positioning; Install the bit: Insert the connector into the connector sleeve so that the magnetic rod is attracted to the connector for positioning.

[0030] By adopting the above technical solution, pulling the push cover drives the push block to disengage from the sliding part, pushing the cover drives the sliding frame to disengage the sliding part from the locking hole and press it against the machine body for positioning. After removing the bit, pushing the cover drives the sliding frame to move back, so that the sliding part is inserted and installed into the locking hole and locking groove for positioning. The connecting part is inserted and installed into the connecting sleeve, so that the magnetic rod is attracted to the connecting part for positioning. This improves the convenience of changing bits and improves the stability of bits during use.

[0031] In summary, this application includes at least one of the following beneficial technical effects: By inserting the connecting part into the connecting sleeve, the magnetic rod is used to attract and position the connecting part. When the bit needs to be removed, the drive mechanism drives the magnetic rod to disengage from the connecting part, and the bit is removed. Then, the drive mechanism drives the magnetic rod back to its original position, and the connecting part of the new bit is inserted into the connecting sleeve. The magnetic rod is used to attract and position the connecting part, thus improving both the stability of the bit during use and the convenience of changing bits. Attached Figure Description

[0032] Figure 1 This is a 3D structural diagram of an electric screwdriver; Figure 2 yes Figure 1 A cross-sectional schematic diagram of AA in the middle; Figure 3 This is a schematic diagram of the internal structure of an electric screwdriver, with a cross-sectional view of the side wall of the mounting bracket. Figure 4 This is a structural schematic diagram of the drive mechanism in an electric screwdriver, with a cross-sectional view of the side wall of the sliding frame.

[0033] Reference numerals: 1. Body; 11. Connecting sleeve; 12. Insertion groove; 13. Mounting bracket; 14. Locking hole; 15. Mounting hole; 16. Fixing bracket; 2. Locking device; 21. Magnetic rod; 22. Connecting groove; 23. Connecting ring; 3. Drive mechanism; 31. Sliding frame; 32. Push block; 321. Locking groove; 322. Guide surface; 33. Sliding groove; 34. Force distribution pin; 35. Fixing hole; 36. Fixing piece; 37. Sliding hole; 4. Elastic locking assembly; 41. Sliding component; 42. Elastic component; 43. Sliding rod; 44. Arc-shaped block; 45. Insertion block; 5. Pushing assembly; 51. Pushing cover; 6. Rotating assembly; 61. Main gear; 62. Drive component; 63. Secondary gear. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0035] This application discloses an electric screwdriver that is easy to unlock.

[0036] Reference Figure 1 and Figure 2The electric screwdriver, designed for easy unlocking, includes a body 1, a connecting sleeve 11 rotatably mounted on the body 1, and a screwdriver bit inserted into the connecting sleeve 11. The connecting sleeve 11 has two ends, one inside and one outside the body 1. A slot 12, coaxially extending through the connecting sleeve 11, is provided on the connecting sleeve 11. The slot 12 has a regular hexagonal cross-section. The screwdriver bit has a connecting part that engages with the slot 12. The connecting part is inserted into the end of the slot 12 located outside the body 1, and the screwdriver bit rests against the connecting sleeve 11 for positioning. The screwdriver also includes a lock for locking the screwdriver bit. The fixing device 2 includes a magnetic rod 21 and a driving mechanism 3. The magnetic rod 21 is inserted into the insertion slot 12 at the end away from the bit. The magnetic rod 21 can slide on the insertion slot 12 and its axis coincides with that of the connecting sleeve 11, so that the magnetic rod 21 can move closer to or away from the connecting sleeve 11. The connecting part abuts against the magnetic rod 21 for adsorption and positioning. The driving mechanism 3 is used to drive the magnetic rod 21 to move and realize the magnetic rod 21 adsorbing and positioning or detaching from the bit. The machine body 1 is also provided with a rotating assembly 6 for driving the magnetic rod 21 to rotate.

[0037] Reference Figure 2 and Figure 3 The drive mechanism 3 includes a sliding frame 31, an elastic locking component 4, a push block 32, and a push component 5. The top of the body 1 has a mounting hole 15 that communicates with the interior of the body 1. A mounting frame 13 is fixedly installed inside the body 1 at the mounting hole 15. The sliding frame 31 is slidably mounted on the upper surface of the mounting frame 13 along the axis of the magnetic rod 21. A sliding groove 33 is provided on the upper surface of the sliding frame 31 along the axis of the magnetic rod 21. Locking holes 14 are provided on the opposite side walls of the mounting frame 13 on both sides of the sliding frame 31. The end of the magnetic rod 21 away from the connecting sleeve 11 extends to the sliding frame 31 and has a circular connecting groove 22 coaxially. A connecting ring 23 that is inserted into the connecting groove 22 is fixedly installed on the sliding frame 31, so that the movement of the sliding frame 31 drives the magnetic rod 21 to move at the same time, and the magnetic rod 21 can rotate freely without interfering with the sliding frame 31. A horizontal force-shaping pin 34 is fixedly installed on the sliding frame 31. The axes of the force-shaping pin 34 and the magnetic rod 21 are perpendicular, and the force-shaping pin 34 abuts against the magnetic rod 21 to provide support force.

[0038] Reference Figure 3 and Figure 4 The sliding frame 31 has fixing holes 35 on both sides of the side wall near the two locking holes 14, which are connected to the sliding groove 33. Fixing plates 36 are inserted into the two fixing holes 35. The fixing plates 36 divide the fixing holes 35 into two independent areas near the locking holes 14 and the sliding groove 33. A sliding hole 37 is provided on the lower surface of the fixing plate 36, which passes through the fixing plate 36 and connects the two independent areas.

[0039] Two elastic locking components 4 are provided and located at two fixing holes 35. The elastic locking components 4 are inserted into the locking holes 14 for positioning under the action of elastic force, thereby positioning the magnetic rod 21. The pushing block 32 is slidably installed on the sliding groove 33 along the axis of the magnetic rod 21, and locking grooves 321 are opened on both side walls of the pushing block 32 near the two fixing holes 35. When the magnetic rod 21 is connected to the connecting part, the elastic locking components 4 are inserted into the locking holes 14 and locking grooves 321 under the action of elastic force. The pushing block 32 prevents the elastic locking components 4 from disengaging from the locking holes 14, thereby positioning the magnetic rod 21.

[0040] An inclined guide surface 322 is provided at one end of the push block 32 near the magnetic rod 21. The distance between the end of the guide surface 322 near the magnetic rod 21 and the elastic locking component 4 is greater than the distance between the end of the guide surface 322 away from the magnetic rod 21 and the elastic locking component 4. The guide surface 322 facilitates the push block 32 to push the elastic locking component 4 to slide on the fixing hole 35 after contacting the elastic locking component 4. The guide surface 322 also facilitates the insertion and installation of the elastic locking component 4 into the locking groove 321.

[0041] Reference Figure 2 and Figure 3 The pushing component 5 is used to drive the pushing block 32 to move. The pushing component 5 includes a pushing cover 51 and a snap-fit ​​block. The pushing cover 51 is slidably mounted on the mounting hole 15 along the sliding direction of the magnetic rod 21, and the pushing block 32 is integrally disposed on the lower surface of the pushing cover 51. The snap-fit ​​block is integrally disposed on the pushing cover 51, and the snap-fit ​​block is inserted and mounted on the body 1 to position the pushing cover 51 and the pushing block 32.

[0042] When the push cover 51 drives the push block 32 to move, the elastic locking component 4 is inserted into the locking groove 321 and the locking hole 14. The push cover 51 blocks the mounting hole 15, and the snap-fit ​​block is inserted into the body 1 for positioning. The push cover 51 moves to drive the push block 32 away from the elastic locking component 4, thereby unlocking the elastic locking component 4. The push block 32 abuts against the sliding frame 31 and pushes the sliding frame 31 to move. The movement of the elastic locking component 4 pushes the elastic locking component 4 out of the locking hole 14. The movement of the sliding frame 31 simultaneously drives the magnetic rod 21 to disengage from the connecting part, thereby unlocking.

[0043] Reference Figure 3 and Figure 4The elastic locking assembly 4 includes a sliding member 41 and an elastic member 42. The sliding member 41 includes a sliding rod 43, an arc-shaped block 44, and a plug-in block 45. The sliding rod 43 is cylindrical and passes through the sliding hole 37 and slides on the sliding hole 37. At the same time, the diameter of the sliding rod 43 is smaller than the width of the sliding hole 37. The arc-shaped block 44 is fixedly installed on one end of the sliding rod 43 near the push block 32 and is arc-shaped. The plug-in block 45 is detachably installed on one end of the sliding rod 43 near the locking hole 14 by screws. The arc-shaped block 44 and the plug-in block 45 are both slidably installed on the fixing hole 35 and are located on both sides of the fixing plate 36 near the push block 32 and the locking hole 14, respectively. At the same time, the sliding direction of the arc-shaped block 44 and the plug-in block 45 is perpendicular to the axial direction of the magnetic rod 21, that is, the direction of force.

[0044] The elastic element 42 is a tower-shaped spring, and the diameter of the end of the elastic element 42 near the plug block 45 is larger than the diameter of the end near the arc block 44. The elastic element 42 is sleeved on the sliding rod 43, and the elastic element 42 passes through the sliding hole 37, so that both ends of the elastic element 42 press against the plug block 45 and the arc block 44 under the action of elastic force. At the same time, the width of the sliding hole 37 is smaller than the maximum diameter of the elastic element 42 but larger than the minimum diameter of the elastic element 42, so that the spring on the side of the plug block 45 cannot pass through the sliding hole 37 completely, while the spring on the side of the arc block 44 can pass through the sliding hole 37 completely. The fixing plate 36, the sliding element 41 and the elastic element 42 can be removed for replacement.

[0045] When the plug-in block 45 approaches the push block 32, the tower-shaped elastic element 42 is squeezed when passing through the sliding hole 37, causing the spring to press against the fixing plate 36. When the spring is under greater force, the elastic element 42 will deform and pass through the sliding hole 37 until the diameter of the spring is too large to pass through the sliding hole 37. At this time, the remaining part of the elastic element 42 can continue to push the plug-in block 45. When the arc-shaped block 44 approaches the locking hole 14, the operation process is the same until the arc-shaped block 44 abuts against the fixing plate 36 for positioning.

[0046] The push block 32 moves away from the two arc-shaped blocks 44 and pushes the two arc-shaped blocks 44 to move. The movement of the two arc-shaped blocks 44 on the fixing hole 35 will push the elastic element 42 through the through hole, thereby reducing the squeezing force on the push block 32 and making it easier for the push block 32 to disengage from the arc-shaped blocks 44. Then the push block 32 pushes the sliding frame 31 to move. The sliding frame 31 moves and squeezes the plug-in block 45. The plug-in block 45 pushes the elastic element 42 through the sliding hole 37 to avoid the block. However, the elastic element 42 cannot pass through the sliding hole 37 completely and leaves a part. This creates an elastic force on the plug-in block 45. The plug-in block 45 is positioned against the side wall of the mounting frame 13 by this elastic force, thereby positioning the magnetic rod 21.

[0047] Remove the bit, and push block 32 moves closer to the two arc-shaped blocks 44. The two guide surfaces 322 press against the two arc-shaped blocks 44, pushing slide frame 31 to move. The movement of slide frame 31 drives two plug-in blocks 45 closer to the locking holes 14, so that the two plug-in blocks 45 are plugged into the two locking holes 14. When push block 32 continues to move, the two arc-shaped blocks 44 are plugged into the two locking slots 321. Push block 32 is used to prevent plug-in blocks 45 from disengaging from locking holes 14, and arc-shaped blocks 44 can also position push block 32.

[0048] Reference Figure 2 and Figure 3 The rotating assembly 6 includes a main gear 61, a driving component 62, and a secondary gear 63. A fixed bracket 16 is fixedly installed on the inner wall of the machine body 1. The main gear 61 is rotatably mounted on the fixed bracket 16, and the magnetic rod 21 is coaxially slidably inserted through the main gear 61, so that the magnetic rod 21 and the main gear 61 rotate simultaneously. The driving component 62 is an electric motor, which is fixedly installed inside the machine body 1. The secondary gear 63 is rotatably mounted on the fixed bracket 16 and meshes with the main gear 61. The output shaft of the driving component 62 is connected to the secondary gear 63. The driving component 62 drives the secondary gear 63 to rotate, the rotation of the secondary gear 63 drives the main gear 61 and the magnetic rod 21, and the rotation of the magnetic rod 21 drives the connecting sleeve 11 and the bit to rotate simultaneously.

[0049] The working principle of this application embodiment is as follows: The push cover 51 moves the drive block 32 away from the two arc-shaped blocks 44. The drive block 32 abuts against the sliding frame 31, driving the sliding frame 31, the insertion block 45, and the magnetic rod 21 to move away from the connecting sleeve 11 simultaneously. The sliding frame 31 drives the insertion block 45 to disengage from the locking hole 14 and press against the mounting bracket 13 for positioning, thereby causing the magnetic rod 21 to disengage from the connecting part. The bit is removed, and the push cover 51 pushes the drive block 32 against the two arc-shaped blocks 44, thereby driving the sliding frame 31, the insertion block 45, and the magnetic rod 21 to move back simultaneously. Approaching the connecting sleeve 11, the insert block 45 is inserted into the locking hole 14, while the arc-shaped block 44 is inserted into the locking groove 321 for positioning. The pushing block 32 is used to prevent the insert block 45 from disengaging from the locking hole 14. At the same time, the snap-fit ​​block is inserted into the machine body 1 to position the pushing block 32. Then, the connecting part of the bit to be replaced is inserted into the connecting sleeve 11, and the magnetic rod 21 is attracted to the connecting part for positioning, thereby realizing the replacement of the bit and improving the stability of the bit during use and the convenience of replacing the bit.

[0050] This application discloses a method for replacing bit.

[0051] Reference Figure 2 and Figure 4 The method for changing screwdriver bits includes the following steps: Unlock: Pulling the push cover 51 drives the push block 32 to disengage from the sliding member 41, thereby unlocking the sliding member 41; Movement: Pulling the push cover 51 drives the push block 32 to abut against the sliding frame 31, pushing the sliding frame 31 to make the sliding part 41 disengage from the locking hole 14 and press against the body 1 for positioning; Remove the bit; Return: Pushing the push cover 51 drives the sliding frame 31 to return, so that the sliding part 41 is inserted and installed into the locking hole 14 and the locking groove 321 for positioning; Install the bit: Insert the connecting part into the connecting sleeve 11 so that the magnetic rod 21 is attracted to the connecting part for positioning.

[0052] The working principle of this application embodiment is as follows: Pulling the push cover 51 drives the push block 32 to disengage from the sliding member 41. The push block 32 pushes the sliding frame 31, causing the sliding member 41 to disengage from the locking hole 14 and press against the machine body 1 for positioning, thus removing the bit. Pushing the push cover 51 drives the sliding frame 31 to move back, causing the sliding member 41 to be inserted and installed into the locking hole 14 and the locking groove 321 for positioning. The connecting part is then inserted and installed into the connecting sleeve 11, causing the magnetic rod 21 to be attracted to the connecting part for positioning. This improves the convenience of changing the bit and enhances the stability of the bit during use.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electric screwdriver that is easy to unlock, characterized in that: The device includes a body (1), a connecting sleeve (11) rotatably mounted on the body (1), and a bit inserted into the connecting sleeve (11). It also includes a locking device (2) for locking the bit. The locking device (2) includes: a magnetic rod (21) that slides along the direction close to or away from the connecting sleeve (11) on the body (1) and extends into the connecting sleeve (11) to adsorb and position the bit; and a driving mechanism (3) for driving the magnetic rod (21) to move and achieve adsorption and positioning or disengagement of the magnetic rod (21) from the bit. A locking hole (14) is provided on the body (1). The driving mechanism (3) includes: a sliding frame (31) that slides along the direction close to or away from the connecting sleeve (11) on the body (1) and is connected to the magnetic rod (21); and an elastic locking assembly (4) that is mounted on the sliding frame (31) and inserted into the locking hole (14) for positioning under elastic force. A push block (32) is slidably disposed on the machine body (1) and abuts against the sliding frame (31) to push the sliding frame (31) to move. When the magnetic rod (21) is connected to the bit, the push block (32) presses against the elastic locking component (4) and is used to prevent the elastic locking component (4) from disengaging from the locking hole (14); a push component (5) is used to drive the push block (32) to move; a locking groove (321) is provided on the push block (32), and the elastic locking component (4) includes: a sliding member (41) which is slidably disposed on the sliding frame (31) in the direction close to or away from the push block (32) and the sliding direction is perpendicular to the sliding direction of the magnetic rod (21); an elastic member (42) which is disposed on the sliding member (41). When the magnetic rod (21) needs to be connected to the bit, the sliding member (41) is inserted into the locking hole (14) and the locking groove (321) for positioning under the action of elastic force.

2. The electric screwdriver with easy unlocking according to claim 1, characterized in that: The sliding frame (31) has a fixing hole (35), a fixing plate (36) is inserted into the fixing hole (35), and a sliding hole (37) is provided on the fixing plate (36). The sliding component (41) includes: a sliding rod (43), which is slidably disposed on the sliding hole (37) in a direction close to or away from the push block (32) and extends to both ends of the fixing plate (36) near the push block (32) and the locking hole (14); and an arc-shaped block (44), which is disposed on one end of the sliding rod (43) near the push block (32). The plug-in block (45) is detachably mounted on one end of the sliding rod (43) near the locking hole (14). The arc-shaped block (44) and the plug-in block (45) are both slidably mounted on the fixing hole (35). The elastic element (42) is sleeved on the sliding rod (43) and passes through the sliding hole (37). The elastic element (42) is tower-shaped and the diameter of the end near the plug-in block (45) is larger than the diameter of the end near the arc-shaped block (44). The width of the sliding hole (37) is smaller than the maximum diameter of the elastic element (42) and larger than the minimum diameter of the elastic element (42), and only allows the elastic element (42) to pass through partially. The two ends of the elastic element (42) press against the arc-shaped block (44) and the plug-in block (45), so that the plug-in block (45) and the arc-shaped block (44) are respectively inserted into the locking hole (14) and the locking groove (321) for positioning.

3. The electric screwdriver with easy unlocking according to claim 1, characterized in that: The push block (32) has an inclined guide surface (322). The distance between the end of the guide surface (322) near the connecting sleeve (11) and the sliding member (41) is smaller than the distance between the end of the guide surface (322) away from the connecting sleeve (11) and the sliding member (41), and it is convenient for the sliding member (41) to be inserted into the locking groove (321) for positioning.

4. The electric screwdriver with easy unlocking according to claim 1, characterized in that: The pushing component (5) includes: a pushing cover (51) which is slidably disposed on the body (1), and a pushing block (32) disposed on the pushing cover (51); and a snap-fit ​​block which is disposed on the pushing cover (51) and inserted into the body (1) for positioning.

5. The electric screwdriver for easy unlocking according to claim 1, characterized in that: The connecting sleeve (11) is provided with a insertion groove (12) that engages with the bit and allows the bit and the connecting sleeve (11) to rotate simultaneously. The magnetic rod (21) engages with the insertion groove (12) and has a circular connecting groove (22) at one end near the sliding frame (31). The sliding frame (31) is provided with a connecting ring (23) that engages with the connecting groove (22). The machine body (1) is provided with a rotating assembly (6) that drives the magnetic rod (21) to rotate.

6. The electric screwdriver with easy unlocking according to claim 5, characterized in that: The rotating assembly (6) includes: a main gear (61), which is rotatably mounted on the body (1), and the magnetic rod (21) slides through the main gear (61) and rotates simultaneously with the main gear (61); a driving member (62), which is mounted on the body (1); and a secondary gear (63), which is rotatably mounted on the body (1) and meshes with the main gear (61) and is connected to the driving member (62).

7. The electric screwdriver for easy unlocking according to claim 5, characterized in that: The sliding frame (31) is provided with a force-sharing pin (34) that abuts against the end of the magnetic rod (21) away from the connecting sleeve (11) to provide a supporting force.

8. A method for changing the bit of an electric screwdriver according to any one of claims 1-7, characterized in that: Includes the following steps: Unlock: Pull the push cover (51) to drive the push block (32) to disengage from the sliding part (41); Movement: Pulling the push cover (51) drives the push block (32) to abut against the sliding frame (31), pushing the sliding frame (31) causes the sliding part (41) to disengage from the locking hole (14) and press against the machine body (1) for positioning; Remove the bit; Return Move: Push the push cover (51) to drive the sliding frame (31) to move back, so that the sliding part (41) is inserted and installed into the locking hole (14) and the locking groove (321) for positioning; Install bit: Insert the bit into the connecting sleeve (11) so that the magnetic rod (21) is attracted to the bit for positioning.

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