Electric screw driver convenient for unlocking and bit replacement method

Abstract

The invention relates to an electric screw driver convenient to unlock and a bit replacement method, and relates to the technical field of electric screw drivers, the electric screw driver convenient to unlock comprises a machine body, a connecting sleeve, a bit and a locking device, the adsorption device is arranged on the machine body in a sliding mode in the direction close to or away from the connecting sleeve, extends into the connecting sleeve and is used for adsorbing and positioning the bit; and the driving mechanism is used for driving the magnetic rod to move and realizing adsorption positioning or separation of the magnetic rod and the screwdriver head. The driving mechanism drives the magnetic rod to enable the magnetic rod to be separated from the connecting part, the screwdriver head is taken down, then the driving mechanism drives the magnetic rod to move back to the original position, the connecting part of a new screwdriver head is installed on the connecting sleeve in an inserted connection mode, and the magnetic rod is used for adsorbing and positioning the connecting part; therefore, the use stability of the screwdriver head and the convenience of replacing the screwdriver head can be improved at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of electric screwdrivers, and in particular to an electric screwdriver that is easy to unlock and a method for replacing a screwdriver bit. Background Art

[0002] Electric screwdrivers are the most commonly used power tools for home improvement. When assembling screws, we will use a variety of bits, such as cross bits, flat bits, hexagonal bits, plum bits, etc.

[0003] A connecting sleeve is rotatably provided on the body of the electric thread cutter, and a connecting part that is plugged into and matched with the connecting sleeve is provided on the screwdriver bit. A magnetic part is provided in the connecting sleeve. The connecting part is inserted into the connecting sleeve and the screwdriver bit is positioned against the connecting sleeve, and the magnetic part is adsorbed on the connecting part for positioning.

[0004] The bit is positioned by a magnetic part and the connecting part, and the magnetic part is located inside the connecting sleeve. Therefore, when removing the bit, the bit needs to be pulled to overcome the adsorption force of the magnetic part so that the connecting part is separated from the magnetic part. Therefore, in order to improve the stability of the bit when in use, the adsorption force of the magnetic part on the connecting part needs to be greater, but this makes it more troublesome to remove the bit. Conversely, in order to facilitate the removal of the bit, the adsorption force on the connecting part is reduced, thereby reducing the stability of the bit when in use, making it impossible to have both. Summary of the invention

[0005] In order to simultaneously improve the stability of a screwdriver bit when in use and the convenience of replacing the screwdriver bit, the present application provides an electric screwdriver that is easy to unlock and a screwdriver bit replacement method.

[0006] In the first aspect, the present application provides an electric screwdriver that is easy to unlock, which adopts the following technical solution: An electric screwdriver that is easy to unlock, comprising a body, a connecting sleeve rotatably arranged on the body, a screwdriver bit plugged into the connecting sleeve, and a locking device for locking the screwdriver bit, the locking device comprising: A magnetic rod is slidably arranged on the machine body in a direction close to or away from the connecting sleeve and extends into the connecting sleeve and is used for adsorbing and positioning the screwdriver bit; The driving mechanism is used to drive the magnetic rod to move and realize the adsorption, positioning or separation of the magnetic rod and the bit.

[0007] By adopting the above technical solution, the connecting part is plugged and installed on the connecting sleeve so that the connecting part rests on the magnetic rod, and the magnetic rod is used to adsorb and position the connecting part. When the bit needs to be removed, the driving mechanism drives the magnetic rod to move away from the bit, so that the magnetic rod is disengaged from the connecting part, and then the bit can be removed. Then the driving mechanism drives the magnetic rod back to its original position, and then the connecting part of the new bit is plugged and installed on the connecting sleeve, and the magnetic rod is used to adsorb and position the connecting part, thereby improving the adsorption force of the magnetic rod on the connecting part, and at the same time, the driving mechanism drives the magnetic rod to disengage from the connecting part, thereby improving the stability of the bit when in use and the convenience of replacing the bit.

[0008] Optionally, a locking hole is provided on the machine body, and the driving mechanism comprises: The sliding frame is slidably arranged on the machine body in a direction close to or away from the connecting sleeve and is connected to the magnetic rod; An elastic locking component is arranged on the sliding frame and is inserted into the locking hole for positioning under the action of elastic force; A pushing block is slidably arranged 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 portion, the pushing block abuts against the elastic locking assembly and is used to prevent the elastic locking assembly from being separated from the locking hole. The pushing component is used to drive the pushing block to move.

[0009] By adopting the above technical solution, the pushing component starts to drive the pushing block to move, and the pushing block first disengages from the elastic locking component, so that the elastic locking component can move elastically. The pushing block moves to drive 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 the extrusion force. At the same time, the movement of the sliding frame drives the magnetic rod to disengage from the connecting part. The elastic locking component can be pressed against the machine body under the action of the elastic force for positioning. At this time, the screwdriver bit can be removed, which reduces the probability of the magnetic rod moving back when replacing the screwdriver bit, and improves the convenience when replacing the screwdriver bit.

[0010] The pushing assembly pushes the pushing block to move back, and the pushing block pushes the elastic locking assembly and the sliding frame to move back at the same time, so that the elastic locking assembly is squeezed and moved to the locking hole. The elastic locking assembly is plugged and installed on the locking hole under the action of elastic force, and the pushing block is pressed against the elastic locking assembly for positioning. The pushing assembly is used to position the pushing block, so that the magnetic rod moves back to its original position. Therefore, the positioning of the pushing block can prevent the elastic locking assembly from escaping from the locking hole, thereby improving the stability of the magnetic rod. Therefore, the elastic force of the elastic locking assembly does not need to be designed to be large, which reduces the force required to drive the magnetic rod to disengage from the connecting part, thereby improving the convenience and stability of the driving magnetic rod when moving, thereby simultaneously improving the stability of the bit when in use and the convenience of replacing the bit.

[0011] Optionally, a locking groove is provided on the pushing block, and the elastic locking assembly includes: The sliding member is arranged on the sliding frame to slide in a direction close to or away from the pushing block, and the sliding direction is perpendicular to the sliding direction of the magnetic rod; The elastic member is arranged on the sliding member. When the magnetic rod needs to be connected with the bit, the sliding member is inserted and arranged on the locking hole and the locking groove under the action of elastic force for positioning.

[0012] By adopting the above technical solution, the pushing assembly drives the pushing block to move, so that the sliding member is disengaged from the locking groove, so that the pushing block is away from the sliding member and close to the sliding frame, and the pushing block pushes the sliding frame and the magnetic rod to move, so that the sliding member can be disengaged from the locking hole after being squeezed, thereby unlocking the sliding frame and the magnetic rod, so that the magnetic rod is disengaged from the connecting part, and then the elastic member pushes the sliding member to press against the machine body to position the sliding frame and the magnetic rod, so that the screwdriver bit can be easily removed.

[0013] The pushing assembly drives the pushing block to move back, and the pushing block drives the sliding piece, the sliding frame and the magnetic rod to approach the connecting sleeve, so that the sliding piece is slidably installed in the locking hole, and the sliding piece is plugged and installed in the locking hole under the action of the elastic piece, and the pushing block continues to move to push the sliding piece to move on the locking hole, that is, the locking groove is close to the sliding piece, so that the sliding piece is plugged and installed in the locking groove under the action of the elastic piece, thereby making the sliding piece plugged and installed in the locking hole and the locking groove, and the sliding direction of the magnetic rod is perpendicular to the sliding direction of the sliding piece, that is, the direction of the impact force on the magnetic rod is perpendicular to the direction of the force required when the sliding piece is unlocked, so only a smaller elastic force of the elastic piece is needed to achieve a greater positioning effect on the magnetic rod, thereby further reducing the force required when the pushing assembly drives the pushing block to move, and improving the convenience during operation, so it can simultaneously improve the stability of the screwdriver bit when in use and the convenience of replacing the screwdriver bit.

[0014] Optionally, the sliding frame is provided with a fixing hole, a fixing sheet is inserted into the fixing hole, a sliding hole is provided on the fixing sheet, and the sliding member includes: The sliding rod is slidably arranged on the sliding hole in a direction close to or away from the pushing block, and the two ends extend to the two sides of the fixing plate close to the pushing block and the locking hole; An arc block is arranged on one end of the sliding rod close to the pushing block; The plug-in block is detachably arranged on one end of the sliding rod near the locking hole, the arc block and the plug-in block are both slidably installed on the fixed hole, the elastic member is sleeved on the sliding rod and passes through the sliding hole, the elastic member is tower-shaped and the diameter of one end near the plug-in block is larger than the diameter of one end near the arc block, the width of the sliding hole is smaller than the maximum diameter of the elastic member and larger than the minimum diameter of the elastic member and only allows part of the elastic member to pass through, the two ends of the elastic member are pressed against the arc block and the plug-in block, and the plug-in block and the arc block are respectively plugged and arranged on the locking hole and the locking groove for positioning.

[0015] By adopting the above technical solution, the fixing plate is removed from the fixing hole, and then the plug-in block is disassembled from the sliding rod to replace the elastic part. At the same time, the damaged structure in the sliding part can also be replaced, thereby improving the convenience of replacing the sliding part and the elastic part.

[0016] The plug-in block and the arc block are respectively arranged corresponding to the locking hole and the latching groove, and the fixing plate separates the plug-in block and the arc block into two different areas. The plug-in block is located on the side of the fixing plate close to the locking hole, and the arc block is located on the side of the fixing plate close to the pushing block, so that the plug-in block slides on the fixing hole on the side of the fixing plate close to the locking hole, and the arc block slides on the fixing hole on the side of the fixing plate close to the pushing block, so that the plug-in block can be easily plugged into the locking hole and the arc block can be easily plugged and installed on the locking groove, and at the same time, both can make slight movements on the fixing hole, thereby facilitating subsequent unlocking.

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

[0018] At the same time, when the plug-in block is disengaged from the locking hole and pressed against the machine body, in this process, the plug-in block and the arc block will be pushed close to the pushing block, and the elastic member will also pass through the sliding hole close to the pushing block. At this time, due to the tower-shaped elastic member, part of the elastic member cannot pass through and push the plug-in block to press against the machine body, so as to achieve the positioning of the magnetic rod, and the pushing block pushes the arc block and the sliding frame to move. At this time, since the thrust is perpendicular to the sliding direction of the plug-in block, the thrust will not increase the friction between the plug-in block and the machine body, and the elastic member is partially moved to the side of the fixed plate close to the pushing block, so that the friction between the plug-in block and the machine body is reduced, thereby greatly improving the convenience of pushing the plug-in block to be plugged and installed in the locking hole. When the plug-in block is plugged and installed in the locking hole, part of the elastic member will also pass through the sliding hole, so as to achieve the avoidance of the pushing block and provide the positioning effect of the locking block, thereby improving the convenience during the pushing process, and at the same time improving the stability of the batch head when using it and the convenience of replacing the batch head.

[0019] Optionally, the push block is provided with an inclined guide surface, the distance between the end of the guide surface close to the connecting sleeve and the sliding member is smaller than the distance between the end of the guide surface far from the connecting sleeve and the sliding member, and facilitates the sliding member to be inserted into the locking groove for positioning.

[0020] By adopting the above technical solution, the guide surface can more easily push the arc block and disengage from the arc block, thereby improving the convenience during operation.

[0021] Optionally, the pushing component includes: A push cover is slidably arranged on the machine body, and the push block is arranged on the push cover; The clamping block is arranged on the push cover and is plugged into the machine body for positioning.

[0022] By adopting the above technical solution, the push cover is pushed to move and drive the push block to move. When the push block drives the sliding frame and the magnetic rod to move away from the connecting sleeve, so that the elastic locking component is pressed against the machine body, a large resistance feeling is generated. At this time, the magnetic rod is disengaged from the connecting part, and then the screwdriver bit can be removed. Then the push cover is pushed back so that the elastic locking component is plugged into the locking hole, and the push block, the sliding frame and the magnetic rod are moved back to their original positions. Then the clamping block is clamped and installed on the machine body to position the push block. Moreover, the movement of the push block inside the machine body is driven by the larger outer shell pushing cover, thereby improving the convenience during operation.

[0023] Optionally, the connecting sleeve is provided with a plug-in slot which is plugged into the bit and allows the bit and the connecting sleeve to rotate simultaneously, the magnetic rod is plug-fitted into the plug-in slot and a circular connecting slot is provided at one end close to the sliding frame, the sliding frame is provided with a connecting ring which is plug-fitted into the connecting slot, and a rotating component which drives the magnetic rod to rotate is provided on the machine body.

[0024] By adopting the above technical solution, one end of the magnetic rod is plugged into and installed on the plug-in slot and can slide in the plug-in slot, at which time one end of the magnetic rod can be supported, and the other end of the magnetic rod is rotatably connected to the sliding frame through a connecting ring, so as to support the other end of the magnetic rod, thereby improving the stability of the magnetic rod during operation. At the same time, the rotating assembly is used to drive the magnetic rod to rotate, and the rotating assembly is located in the middle of the magnetic rod. The rotation of the magnetic rod drives the connecting sleeve, the connecting part and the screwdriver bit to rotate, thereby making the electric screwdriver structure more compact and stable.

[0025] Optionally, the rotating assembly includes: A main gear is rotatably arranged on the machine body, and the magnetic rod is slidably arranged on the main gear and rotates simultaneously with the main gear; A driving member, arranged on the machine body; The auxiliary gear is rotatably arranged on the machine body and meshes with the main gear and is connected with the driving member.

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

[0027] Optionally, the sliding frame is provided with a force distribution pin which abuts against the end of the magnetic rod away from the connecting sleeve to support the force distribution.

[0028] By adopting the above technical solution, when the magnetic rod is subjected to extrusion force, the force will be concentrated on the connecting ring, so that the connecting ring is subjected to greater force and is easy to be damaged. Therefore, the force distribution pin is used to press 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] In the second aspect, the present application provides a method for replacing a screwdriver bit, which adopts the following technical solution: A method for replacing a batch head comprises the following steps: Unlock: Pull the push cover to drive the push block to disengage from the sliding member; Movement: Pull the push cover to drive the push block to abut against the sliding frame, push the sliding frame so that the sliding piece is disengaged from the locking hole and pressed against the machine body for positioning; Remove the bit; Back movement: Push the push cover to drive the sliding frame to move back, so that the sliding piece is inserted and installed on the locking hole and the locking groove for positioning; Install the bit: plug the connecting part into the connecting sleeve so that the magnetic rod is adsorbed on the connecting part for positioning.

[0030] By adopting the above technical solution, the push cover is pulled to drive the push block to disengage from the sliding member, and the push cover drives the sliding frame to disengage the sliding member from the locking hole and press against the machine body for positioning. The screwdriver bit is removed, and the push cover drives the sliding frame to move back, so that the sliding member is plugged and installed on the locking hole and the locking groove for positioning, and the connecting part is plugged and installed on the connecting sleeve, so that the magnetic rod is adsorbed on the connecting part for positioning, thereby improving the convenience of replacing the screwdriver bit and improving the stability of the screwdriver bit when in use.

[0031] In summary, the present application includes at least one of the following beneficial technical effects: The connecting part is plugged and installed on the connecting sleeve, and the magnetic rod is used to adsorb and position the connecting part. When the bit needs to be removed, the driving mechanism drives the magnetic rod to disengage the magnetic rod from the connecting part, and the bit is removed. Then the driving mechanism drives the magnetic rod back to its original position, and then the connecting part of the new bit is plugged and installed on the connecting sleeve, and the magnetic rod is used to adsorb and position the connecting part. Therefore, the stability of the bit when in use and the convenience of replacing the bit can be improved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional structural diagram of an electric screwdriver; Figure 2 yes Figure 1 Schematic diagram of the cross section of AA; Figure 3 It is a schematic diagram of the internal structure of the electric screwdriver, in which the side wall of the fixing frame is cut away; Figure 4 It is a schematic diagram of the structure of the driving mechanism in the electric screwdriver, in which the side wall of the sliding frame is cut away.

[0033] Figure numerals: 1. body; 11. connecting sleeve; 12. plug-in slot; 13. mounting frame; 14. locking hole; 15. mounting hole; 16. fixing frame; 2. locking device; 21. magnetic rod; 22. connecting slot; 23. connecting ring; 3. driving mechanism; 31. sliding frame; 32. pushing block; 321. locking slot; 322. guide surface; 33. sliding slot; 34. force distribution pin; 35. fixing hole; 36. fixing plate; 37. sliding hole; 4. elastic locking assembly; 41. sliding member; 42. elastic member; 43. sliding rod; 44. arc block; 45. plug-in block; 5. pushing assembly; 51. pushing cover; 6. rotating assembly; 61. main gear; 62. driving member; 63. secondary gear. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The embodiment of the present application discloses an electric screwdriver that is easy to unlock.

[0036] Reference Figure 1 and Figure 2The electric screwdriver for easy unlocking comprises a body 1, a connecting sleeve 11 rotatably arranged on the body 1, and a screwdriver bit plugged into the connecting sleeve 11, wherein the two ends of the connecting sleeve 11 are respectively arranged at the inner and outer sides of the body 1, and a plugging groove 12 penetrating the connecting sleeve 11 is coaxially provided on the connecting sleeve 11, and the plugging groove 12 has a regular hexagonal cross section, and a connecting part plugged into and matched with the plugging groove 12 is arranged on the screwdriver bit, and the connecting part is plugged and installed on one end of the plugging groove 12 located outside the body 1, and the screwdriver bit is positioned against the connecting sleeve 11; and a lock for locking the screwdriver bit is also included. The locking device 2 includes a magnetic rod 21 and a driving mechanism 3. The magnetic rod 21 is plugged and installed on the end of the plug-in slot 12 away from the screwdriver bit. The magnetic rod 21 can slide on the plug-in slot 12 and the axis of the magnetic rod 21 and the connecting sleeve 11 coincide with each other, so that the magnetic rod 21 can move closer to or away from the connecting sleeve 11, and 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 adsorption and positioning or separation of the magnetic rod 21 and the screwdriver bit; a rotating component 6 for driving the magnetic rod 21 to rotate is also provided on the machine body 1.

[0037] Reference Figure 2 and Figure 3 The driving mechanism 3 includes a sliding frame 31, an elastic locking component 4, a pushing block 32 and a pushing component 5. A mounting hole 15 communicating with the inside of the body 1 is provided on the top of the body 1. A mounting frame 13 is fixedly installed in the body 1 and located at the mounting hole 15. The sliding frame 31 is slidably installed on the upper surface of the mounting frame 13 along the axial direction of the magnetic rod 21, and a sliding groove 33 is provided on the upper surface of the sliding frame 31 along the axial direction of the magnetic rod 21. Locking holes 14 are provided on the opposite side walls of the mounting frame 13 and on both sides of the sliding frame 31; One end of the magnetic rod 21 away from the connecting sleeve 11 extends to the sliding frame 31 and is coaxially provided with a circular connecting groove 22. A connecting ring 23 that is plugged into the connecting groove 22 is fixedly installed on the sliding frame 31, so that the sliding frame 31 moves and 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 force distribution pin 34 in a horizontal state is fixedly installed on the sliding frame 31, and the axes of the force distribution pin 34 and the magnetic rod 21 are perpendicular, and the force distribution pin 34 rests on the magnetic rod 21 to support the force distribution.

[0038] Reference Figure 3 and Figure 4 On both side walls of the sliding frame 31 near the two locking holes 14, fixing holes 35 connected to the sliding groove 33 are provided. Fixing plates 36 are inserted and installed on the two fixing holes 35. The fixing plates 36 separate the fixing holes 35 into two independent areas near the locking holes 14 and the sliding groove 33. On the lower surface of the fixing plate 36, a sliding hole 37 is provided that penetrates the fixing plate 36 and connects the two independent areas.

[0039] Two elastic locking components 4 are provided and located at the two fixing holes 35. At the same time, the elastic locking components 4 are inserted and installed on the locking hole 14 under the action of elastic force for positioning, so as to realize the positioning of the position of the magnetic rod 21; the pushing block 32 is slidably installed on the sliding groove 33 along the axial direction of the magnetic rod 21, and locking grooves 321 are provided on the two side walls of the pushing block 32 close to the two fixing holes 35; when the magnetic rod 21 is connected to the connecting part, the elastic locking component 4 is inserted and installed on the locking hole 14 and the locking groove 321 under the action of elastic force, and the pushing block 32 prevents the elastic locking component 4 from detaching from the locking hole 14, so as to realize the positioning of the magnetic rod 21.

[0040] An inclined guide surface 322 is provided at the end of the pushing block 32 close to the magnetic rod 21, and the distance between the end of the guide surface 322 close to 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 pushing block 32 to push the elastic locking component 4 to slide on the fixing hole 35 after contact with the elastic locking component 4, and the guide surface 322 facilitates the elastic locking component 4 to be inserted and installed 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, and the pushing component 5 includes a pushing cover 51 and a clamping block. The pushing cover 51 is slidably installed on the mounting hole 15 along the sliding direction of the magnetic rod 21, and the pushing block 32 is integrally arranged on the lower surface of the pushing cover 51; the clamping block is integrally arranged on the pushing cover 51, and the clamping block is plugged and installed on the body 1 to position the pushing cover 51 and the pushing block 32.

[0042] The pushing cover 51 drives the pushing block 32 to move, so that when the elastic locking component 4 is plugged into the locking groove 321 and the locking hole 14, the pushing cover 51 blocks the installation hole 15, and the card block is plugged into the body 1 for positioning; the pushing cover 51 moves to drive the pushing block 32 away from the elastic locking component 4, so as to unlock the elastic locking component 4, and the pushing block 32 abuts against the sliding frame 31 to push the sliding frame 31 to move. The movement of the elastic locking component 4 pushes the elastic locking component 4 to disengage from the locking hole 14, and the movement of the sliding frame 31 simultaneously drives the magnetic rod 21 to disengage from the connecting part, thereby achieving 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 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 block 44 is fixedly installed on one end of the sliding rod 43 close to the pushing block 32, and the arc block 44 is arc-shaped, and the plug-in block 45 is detachably installed on one end of the sliding rod 43 close to the locking hole 14 by screws. The arc block 44 and the plug-in block 45 are both slidably installed on the fixing hole 35 and are respectively located on both sides of the fixing plate 36 close to the pushing block 32 and the locking hole 14. At the same time, the sliding direction of the arc block 44 and the plug-in block 45 is perpendicular to the axial direction of the magnetic rod 21, that is, the force direction.

[0044] The elastic member 42 is a tower-shaped spring, and the diameter of the elastic member 42 at one end close to the plug-in block 45 is larger than the diameter of the end close to the arc block 44. The elastic member 42 is sleeved on the sliding rod 43, and the elastic member 42 passes through the sliding hole 37 so that the two ends of the elastic member 42 are pressed against the plug-in 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 member 42 and larger than the minimum diameter of the elastic member 42, so that the spring located on one side of the plug-in block 45 cannot pass through the sliding hole 37 completely, while the spring located on one side of the arc block 44 can pass through the sliding hole 37 completely; at the same time, the fixing plate 36, the sliding member 41 and the elastic member 42 can be removed for replacement.

[0045] When the plug-in block 45 approaches the pushing block 32, the tower-shaped elastic member 42 will be squeezed when passing through the sliding hole 37, so that the spring will be pressed against the fixing plate 36. When the spring is subjected to a large force, the elastic member 42 will be deformed 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 member 42 can continue to generate a thrust on the plug-in block 45. When the arc block 44 approaches the locking hole 14, the operation process is the same until the arc block 44 rests on the fixing plate 36 for positioning.

[0046] The pushing block 32 moves away from the two arc blocks 44 and pushes the two arc blocks 44 to move. The movement of the two arc blocks 44 on the fixing hole 35 will push the elastic member 42 to pass through the through hole, thereby reducing the squeezing force on the pushing block 32, making it easy for the pushing block 32 to disengage from the arc block 44, and then the pushing block 32 pushes the sliding frame 31 to move, and the sliding frame 31 moves to squeeze the plug-in block 45, and the plug-in block 45 pushes the elastic member 42 to pass through the sliding hole 37 to avoid the position, but the elastic member 42 cannot pass through the sliding hole 37 completely and a part of it is left, so as to form an elastic force on the plug-in block 45, and the plug-in block 45 is pressed against the side wall of the mounting frame 13 by this elastic force for positioning, so that the magnetic rod 21 can be positioned.

[0047] Remove the screwdriver bit, and the pushing block 32 moves close to the two arc blocks 44. The two guide surfaces 322 press against the two arc blocks 44 to push the sliding frame 31 to move. The sliding frame 31 moves and drives the two plug-in blocks 45 close to the locking holes 14, so that the two plug-in blocks 45 are plugged and installed on the two locking holes 14. When the pushing block 32 continues to move, the two arc blocks 44 are plugged and installed on the two locking grooves 321. The pushing block 32 is used to prevent the plug-in block 45 from disengaging from the locking hole 14, and the arc block 44 can also position the pushing block 32.

[0048] Reference Figure 2 and Figure 3 The rotating assembly 6 includes a main gear 61, a driving member 62 and a sub-gear 63. A fixing frame 16 is fixedly mounted on the inner side wall of the machine body 1. The main gear 61 is rotatably mounted on the fixing frame 16, and the magnetic rod 21 is coaxially slidably penetrated on the main gear 61, so that the magnetic rod 21 and the main gear 61 rotate simultaneously. The driving member 62 is an electric motor, which is fixedly mounted in the machine body 1. The sub-gear 63 is rotatably mounted on the fixing frame 16 and meshes with the main gear 61. The output shaft of the driving member 62 is connected to the sub-gear 63. The driving member 62 drives the sub-gear 63 to rotate, and the sub-gear 63 rotates to drive the main gear 61 and the magnetic rod 21. The magnetic rod 21 rotates to drive the connecting sleeve 11 and the screwdriver bit to rotate simultaneously.

[0049] The working principle of the embodiment of the present application is as follows: The push cover 51 moves to drive the push block 32 to disengage from the two arc blocks 44, and the push block 32 abuts against the sliding frame 31 to drive the sliding frame 31, the plug-in block 45 and the magnetic rod 21 to move away from the connecting sleeve 11 at the same time. The sliding frame 31 drives the plug-in block 45 to disengage from the locking hole 14 and press against the mounting frame 13 for positioning, thereby disengaging the magnetic rod 21 from the connecting portion, removing the screwdriver bit, and the push cover 51 pushes the push block 32 to abut against the two arc blocks 44, thereby pushing the sliding frame 31, the plug-in block 45 and the magnetic rod 21 to move back at the same time. Close to the connecting sleeve 11, the plug-in block 45 is plugged into the locking hole 14, and the arc block 44 is plugged into the locking groove 321 for positioning. The pushing block 32 is used to prevent the plug-in block 45 from disengaging from the locking hole 14. At the same time, the clamping block is plugged into the body 1 to position the pushing block 32, and then the connecting part of the screwdriver bit to be replaced is plugged into the connecting sleeve 11, and the magnetic rod 21 is adsorbed on the connecting part for positioning, thereby realizing the replacement of the screwdriver bit, while improving the stability of the screwdriver bit when in use and the convenience of replacing the screwdriver bit.

[0050] The embodiment of the present application discloses a method for replacing a bit.

[0051] Reference Figure 2 and Figure 4 , the head replacement method includes the following steps: Unlocking: Pull the push cover 51 to drive the push block 32 to disengage from the sliding member 41, so as to unlock the sliding member 41; Movement: Pull the push cover 51 to drive the push block 32 to abut against the sliding frame 31, and push the sliding frame 31 so that the sliding member 41 is disengaged from the locking hole 14 and pressed against the body 1 for positioning; Remove the bit; Back movement: Push the push cover 51 to drive the sliding frame 31 to move back, so that the sliding member 41 is inserted and installed on the locking hole 14 and the locking groove 321 for positioning; Install the bit: plug and install the connecting part onto the connecting sleeve 11 so that the magnetic rod 21 is adsorbed on the connecting part for positioning.

[0052] The working principle of the embodiment of the present application is as follows: Pull the push cover 51 to drive the push block 32 to disengage from the sliding member 41, and the push block 32 pushes the sliding frame 31 so that the sliding member 41 disengages from the locking hole 14 and is pressed against the machine body 1 for positioning, and the screwdriver bit is removed; push the push cover 51 to drive the sliding frame 31 to move back, so that the sliding member 41 is plugged and installed on the locking hole 14 and the locking groove 321 for positioning, and the connecting part is plugged and installed on the connecting sleeve 11, so that the magnetic rod 21 is adsorbed on the connecting part for positioning, thereby improving the convenience of replacing the screwdriver bit and improving the stability of the screwdriver bit when in use.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric screwdriver that is easy to unlock, characterized in that: The invention comprises a machine body (1), a connecting sleeve (11) rotatably arranged on the machine body (1), a screwdriver bit plugged into the connecting sleeve (11), and a locking device (2) for locking the screwdriver bit, wherein the locking device (2) comprises: A magnetic rod (21) is slidably disposed on the machine body (1) in a direction approaching or moving away from the connecting sleeve (11) and extends into the connecting sleeve (11) and is used to adsorb and position the screwdriver bit; The driving mechanism (3) is used to drive the magnetic rod (21) to move and achieve adsorption and positioning of the magnetic rod (21) and the screwdriver bit or separation.

2. The electric screwdriver that is easy to unlock according to claim 1, characterized in that: The machine body (1) is provided with a locking hole (14), and the driving mechanism (3) comprises: A sliding frame (31) is slidably disposed on the machine body (1) in a direction approaching or moving away from the connecting sleeve (11) and is connected to the magnetic rod (21); An elastic locking component (4) is arranged on the sliding frame (31) and is inserted into the locking hole (14) for positioning under the action of elastic force; a pushing block (32) which is slidably arranged 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 connecting portion, the pushing block (32) abuts against the elastic locking component (4) and is used to prevent the elastic locking component (4) from being separated from the locking hole (14); The pushing assembly (5) is used to drive the pushing block (32) to move.

3. The electric screwdriver that is easy to unlock according to claim 2, characterized in that: The pushing block (32) is provided with a locking groove (321), and the elastic locking component (4) comprises: A sliding member (41) is arranged on the sliding frame (31) to slide in a direction approaching or moving away from the pushing block (32), and the sliding direction is perpendicular to the sliding direction of the magnetic rod (21); The elastic member (42) is arranged 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) under the action of elastic force for positioning.

4. The electric screwdriver that is easy to unlock according to claim 3, characterized in that: The sliding frame (31) is provided with a fixing hole (35), a fixing sheet (36) is inserted into the fixing hole (35), and a sliding hole (37) is provided on the fixing sheet (36). The sliding member (41) comprises: A sliding rod (43) is slidably disposed on the sliding hole (37) in a direction approaching or moving away from the pushing block (32), and both ends of the sliding rod extend to both sides of the fixing plate (36) close to the pushing block (32) and the locking hole (14); An arc-shaped block (44) is arranged on one end of the sliding rod (43) close to the pushing block (32); The plug-in block (45) is detachably arranged on one end of the sliding rod (43) near the locking hole (14); the arc block (44) and the plug-in block (45) are both slidably installed on the fixing hole (35); the elastic member (42) is sleeved on the sliding rod (43) and passes through the sliding hole (37); the elastic member (42) is tower-shaped and has a diameter at one end near the plug-in block (45) greater than a diameter at one end near the arc block (44); the width of the sliding hole (37) is smaller than the maximum diameter of the elastic member (42) and larger than the minimum diameter of the elastic member (42) and only allows a portion of the elastic member (42) to pass through; the two ends of the elastic member (42) are pressed against the arc block (44) and the plug-in block (45) so that the plug-in block (45) and the arc block (44) are respectively plugged and arranged on the locking hole (14) and the locking groove (321) for positioning.

5. The electric screwdriver that is easy to unlock according to claim 3, characterized in that: The pushing block (32) is provided with an inclined guide surface (322), wherein the distance between the end of the guide surface (322) close to the connecting sleeve (11) and the sliding member (41) is smaller than the distance between the end of the guide surface (322) far from the connecting sleeve (11) and the sliding member (41), and facilitates the sliding member (41) to be inserted and arranged on the locking groove (321) for positioning.

6. The electric screwdriver that is easy to unlock according to claim 2, characterized in that: The pushing component (5) comprises: A push cover (51) is slidably disposed on the machine body (1), and the push block (32) is disposed on the push cover (51); The clamping block is arranged on the push cover (51) and is plugged into the machine body (1) for positioning.

7. The electric screwdriver that is easy to unlock according to claim 2, characterized in that: The connecting sleeve (11) is provided with a plugging groove (12) which is plugged into the screwdriver bit and enables the screwdriver bit and the connecting sleeve (11) to rotate simultaneously; the magnetic rod (21) is plugged into the plugging groove (12) and is provided with a circular connecting groove (22) at one end close to the sliding frame (31); the sliding frame (31) is provided with a connecting ring (23) which is plugged into the connecting groove (22); and the body (1) is provided with a rotating assembly (6) which drives the magnetic rod (21) to rotate.

8. The electric screwdriver that is easy to unlock according to claim 7, characterized in that: The rotating assembly (6) comprises: A main gear (61) is rotatably mounted on the machine body (1); the magnetic rod (21) is slidably mounted on the main gear (61) and rotates simultaneously with the main gear (61); A driving member (62) is arranged on the machine body (1); The secondary gear (63) is rotatably disposed on the machine body (1) and meshes with the primary gear (61) and is connected to the driving member (62).

9. The electric screwdriver that is easy to unlock according to claim 7, characterized in that: The sliding frame (31) is provided with a force distribution pin (34) which abuts against an end of the magnetic rod (21) away from the connecting sleeve (11) to support the distribution of force.

10. A method for replacing a bit of an electric screwdriver according to any one of claims 1 to 9, characterized in that: The following steps are involved: Unlocking: Pulling the push cover (51) drives the push block (32) to disengage from the sliding member (41); Movement: pulling the push cover (51) to drive the push block (32) to abut against the sliding frame (31), pushing the sliding frame (31) so that the sliding member (41) is disengaged from the locking hole (14) and pressed against the machine body (1) for positioning; Remove the bit; Returning: pushing the push cover (51) to drive the sliding frame (31) to return, so that the sliding member (41) is inserted and installed on the locking hole (14) and the locking groove (321) for positioning; Installing the bit: The connecting part is plugged into the connecting sleeve (11) so that the magnetic rod (21) is adsorbed on the connecting part for positioning.

Images