Power tool

Abstract

This application provides an electric tool, including a housing, a motor, a switch for controlling the start and stop of the motor, a trigger connected to the housing, and a stop. The trigger includes an operating part, an actuating part, and a locking block, with at least a portion of the operating part extending outside the housing, and the actuating part and locking block disposed inside the housing. The stop includes a pressing part and a locking groove, with at least a portion of the pressing part extending outside the housing. The stop has a locked position and an unlocked position relative to the trigger. When the stop is in the locked position, the locking block is located in the locking groove, the actuating part is in a first position away from the switch, and the motor is in a closed state. When the stop is in the unlocked position, the locking block separates from the locking groove, the actuating part moves between a first position and a second position, and when the actuating part is in the second position cooperating with the switch, the motor is in a started state.

Description

Technical Field

[0001] This application relates to the field of electric equipment technology, and more particularly to an electric tool. Background Technology

[0002] In the current field of power tool design, safety issues are becoming a prominent challenge. Taking power tools such as electric drills and hammer drills as examples, in practical applications, the start and stop of the power tool are usually controlled by pulling a trigger, and the power tool is stopped by stopping the trigger.

[0003] However, in actual use, if a user accidentally presses the trigger after the power tool has stopped, the tool is very likely to restart. This accidental restart may cause injury to the user, such as fingers getting caught in rotating parts, or causing unpredictable damage to the object being operated, seriously affecting work safety. Utility Model Content

[0004] In view of the above, this application provides a power tool that can prevent the motor from restarting and causing accidents when the user accidentally touches the trigger, thereby improving the safety of the power tool.

[0005] The first aspect of this application provides an electric tool, which includes a housing, a motor, a switch for controlling the start and stop of the motor, a trigger connected to the housing, and a stop. The trigger includes an operating part, an actuating part, and a locking block, with at least a portion of the operating part extending outside the housing, and the actuating part and the locking block disposed inside the housing. The stop includes a pressing part and a locking groove, with at least a portion of the pressing part extending outside the housing, and the stop having a locked position and an unlocked position relative to the trigger. When the stop is in the locked position, the locking block is located in the locking groove, the actuating part is in a first position away from the switch, and the motor is in a closed state. When the stop is in the unlocked position, the locking block separates from the locking groove, the actuating part moves between the first position and a second position, and when the actuating part is in the second position cooperating with the switch, the motor is in a started state.

[0006] As an optional implementation, the area swept by the actuating part between the first and second positions is defined as the unlocking area. When the stop is in the unlocking position, the lock block is located within the unlocking area, and the lock groove is located outside the unlocking area.

[0007] As an optional implementation, the pivot of the trigger and the pivot of the stop are perpendicular to the unlocking area.

[0008] As an optional implementation, the lock block includes a connecting part and a locking part; the stop is provided with a clearance part for the connecting part; when the stop is in the locked position, the locking part and the connecting part engage in the lock groove so that the triggering part is in the first position; when the trigger moves between the first position and the second position, the lock block is located in the unlocking area; the clearance part is used to clear the connecting part when the stop is in the unlocking position.

[0009] As an optional implementation, the power tool also includes a first rotating shaft, and the stop includes a first stop plate and a second stop plate; the first rotating shaft is disposed within the housing along a first axis, the first stop plate and the second stop plate are perpendicular to the first axis, the first stop plate and the second stop plate are disposed parallel to the first rotating shaft, a receiving space for an actuating part is provided between the first stop plate and the second stop plate, and a locking groove is disposed at a position of the first stop plate and the second stop plate near the receiving space.

[0010] As an optional implementation, the first stop plate is provided with a spline, and the first rotating shaft is provided with a positioning groove for the spline, and the spline on the first stop plate and the positioning groove on the first rotating shaft engage with each other.

[0011] As an optional implementation, the second stop plate and the rotating shaft are integrated.

[0012] As an optional implementation, the trigger is also provided with a clearance notch for the first pivot; the clearance notch is used to avoid the first pivot when the trigger moves between the first position and the second position.

[0013] As an alternative implementation, the power tool also includes a second spindle; the second spindle is disposed within the housing along a second axis, and the trigger is sleeved on the second spindle.

[0014] As an optional implementation, the first axis and the second axis may not be parallel.

[0015] The power tool provided in this application separates the locking block from the locking groove when the stop is in the unlocked position, allowing the user to move the contact part between a first and a second position via the trigger. When the contact part is in the second position, which engages with the switch, the user can control the motor to start. When the stop is in the locked position, the locking block is engaged in the locking groove, so that the trigger and contact part are in the first position away from the switch, preventing the user from accidentally pressing the trigger and improving the safety and reliability of the power tool. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an electric tool provided in one embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the internal structure of a power tool provided in one embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the first specific structure of the power tool provided in one embodiment of this application.

[0019] Figure 4 This is a second specific structural schematic diagram of the power tool provided in one embodiment of this application.

[0020] Figure 5 This is a third specific structural diagram of the power tool provided in one embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the structure of the stop provided in one embodiment of this application.

[0022] Figure 7 This is another structural schematic diagram of the stop provided in one embodiment of this application.

[0023] Figure 8 This is a schematic diagram of the disassembled structure of the stop provided in one embodiment of this application.

[0024] Figure 9 This is a schematic diagram of the trigger provided in one embodiment of this application.

[0025] Figure 10 This is another schematic diagram of the trigger provided in one embodiment of this application.

[0026] Explanation of main component symbols: power tool 100, housing 10, motor 20, switch 30, trigger 40, stop 50, battery pack slot 60, handle 70, connecting rod 80, first torsion spring 11, second torsion spring 12, first rotating shaft 13, second rotating shaft 14, first limiting part 15, second limiting part 16, pressing part 51, locking groove 52, first stop plate 53, second stop plate 54, receiving space 55, first rotating plate 56, clearance part 57, first axis S1, second axis S2, spline 531, positioning groove 801, operating part 41, touching part 42, locking block 43, second rotating plate 44, mounting hole 45, clearance notch 46, connecting part 431, locking part 432. Detailed Implementation

[0027] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0029] In the embodiments of this application, terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or order. For example, "first application" and "second application" are used to distinguish different applications, not to describe a specific order of applications. Features specified as "first" or "second" may explicitly or implicitly include one or more of those features.

[0030] In current power tool designs, ease of operation and comfort face significant challenges. When users use power tools, such as common electric drills and hammer drills, if they need to pause tool operation during work, they usually have to stop pulling the trigger and then pull the stop to lock the power tool.

[0031] However, in practical applications, if a user accidentally pulls the trigger after the power tool has stopped, it is highly likely to restart. This accidental restart can cause injury to the user, such as fingers getting caught in rotating parts, or unpredictable damage to the object being worked on, seriously affecting work safety. Furthermore, when the power tool includes a stop mechanism, the user needs to move their hand to find and engage it after stopping the trigger. This process is not only time-consuming but also physically demanding, and frequent hand movements can lead to fatigue and reduced operating comfort. Over time, this will diminish the user experience and may even create safety hazards due to operational inconvenience.

[0032] Therefore, this application provides a power tool that can prevent the motor from restarting unexpectedly when the user accidentally touches the trigger, thereby improving the safety of the power tool.

[0033] Please refer to Figure 1 The diagram shows a structural schematic of a power tool 100 according to an embodiment of this application. Please refer to... Figure 2 In this embodiment, the power tool 100 includes a housing 10, a motor 20, a switch 30 for controlling the start and stop of the motor 20, a trigger 40 connected to the housing 10, a stop 50, a battery pack slot 60, a handle 70 for the user to grip, and a connecting rod 80 for connecting a working head. The handle 70 is located near the trigger 40, and the battery pack slot 60 is located on the housing 10 away from the connecting rod 80; that is, the distance between the battery pack slot 60 and the connecting rod 80 is greater than the distance between the battery pack slot 60 and the handle 70. In practical applications, the battery pack can be inserted into the battery pack slot 60 to provide power to the motor 20.

[0034] Please refer to Figures 3 to 5 The power tool 100 also includes a first torsion spring 11, a second torsion spring 12, a first rotating shaft 13, and a second rotating shaft 14. A first limiting part 15 and a second limiting part 16 are provided within the housing 10. The first rotating shaft 13 is a cylindrical support component extending along the first axis S1, which can be made of steel or a composite material, and is used to provide a rotation fulcrum for the stop 50. The second rotating shaft 14 is a cylindrical support component extending along the second axis, which can also be made of steel or a composite material, and is used to provide a rotation fulcrum for the trigger 40. In practical applications, the first axis S1 and the second axis may not be parallel.

[0035] Please see Figure 6 and Figure 7 The stop 50 includes a pressing part 51, a locking groove 52, a first stop plate 53, a second stop, and a first rotating plate 56, and the stop 50 is provided with a clearance part 57. At least a portion of the pressing part 51 extends out of the outer side of the housing 10. The first rotating shaft 13 is disposed inside the housing 10 along the first axis S1. The first stop plate 53 and the second stop plate 54 are perpendicular to the first axis S1, respectively, and are disposed parallel to the first rotating shaft 13. A receiving space 55 is provided between the first stop plate 53 and the second stop plate 54. The locking groove 52 is disposed at a position of the first stop plate 53 and the second stop plate 54 near the receiving space 55. Please refer again. Figure 3 The first rotating shaft 13 is fixed inside the housing 10. The first torsion spring 11 is sleeved on one end of the first rotating shaft 13. One end of the first torsion spring 11 abuts against the first rotating plate 56, and the other end of the first torsion spring 11 abuts against the first limiting part 15.

[0036] Among them, the groove structure of the first stop plate 53 and the second stop plate 54 near the edge of the receiving space 55 is a locking groove 52, which is used to engage with the locking block 43 in the locked position to restrict the movement of the trigger 40.

[0037] In this embodiment, the first stop plate 53 and the second stop plate 54 are arranged in parallel to ensure that the two sides of the lock groove 52 are symmetrically supported, thus avoiding structural deformation caused by unilateral force.

[0038] Please see Figure 8 The first stop plate 53 is provided with a spline 531, and the first rotating shaft 13 is provided with a positioning groove 801 for the spline 531. The spline 531 on the first stop plate 53 and the positioning groove 801 on the first rotating shaft 13 engage with each other. When the stop member 50 rotates around the first rotating shaft 13, the engagement of the spline 531 and the positioning groove 801 prevents relative sliding between the first stop plate 53 and the first rotating shaft 13. The second stop plate 54 can be connected to the first rotating shaft 13 by welding or integral molding. In practical applications, it is not limited to this, depending on the specific application environment, and all are within the scope of protection of this application.

[0039] In practical applications, when the user presses the pressing part 51, the stop 50 rotates around the first pivot 13, causing the first rotating plate 56 to press the first torsion spring 11, thereby separating the locking block 43 from the locking groove 52, and the stop 50 is in the unlocked position. When the user stops pressing the pressing part 51 of the stop 50, the stop 50 returns to the locked position under the reset action of the first torsion spring 11, to prevent the user from accidentally triggering the motor 20.

[0040] Specifically, the first rotating shaft 13 is fixed inside the housing 10 and extends along the first axis S1. The first stop plate 53 and the second stop plate 54 are vertically mounted on both sides of the rotating shaft, forming a parallel and symmetrical layout. The receiving space 55 between the two plates allows the trigger 40 to move freely to the second position when unlocked, while the locking groove 52 is provided on the inner edge of the two plates near the receiving space 55. When the stop 50 is in the locked position, the trigger 40 is restricted to the first position away from the switch 30; when the stop 50 rotates to the unlocked position, the locking groove 52 rotates with the first stop plate 53 and the second stop plate 54, disengaging from the trigger 40, allowing the trigger 40 to move to the second position to trigger the switch 30.

[0041] Please see Figure 9 and Figure 10 The trigger 40 includes an operating part 41, an actuating part 42, a locking block 43, and a second rotating plate 44. The trigger 40 has a mounting hole 45. At least a portion of the operating part 41 extends outside the housing 10, while the actuating part 42 and the locking block 43 are disposed inside the housing 10. A second rotating shaft 14 passes through the mounting hole 45, allowing the trigger 40 to be fitted onto the second rotating shaft 14 and to rotate around the second rotating shaft 14 as a fulcrum. Please refer again. Figure 3 The second rotating shaft 14 is fixed inside the housing 10. The second torsion spring 12 is sleeved on one end of the second rotating shaft 14. One end of the second torsion spring 12 abuts against the second rotating plate 44, and the other end of the second torsion spring 12 abuts against the second limiting part 16.

[0042] When the actuating part 42 is in one position, it is housed within the receiving space 55. The locking block 43 is a rigid component that forms a mechanical lock with the stop member 50; specifically, it can physically limit movement by engaging with the locking groove 52. The actuating part 42 is an element that triggers the motor 20 to start and stop in conjunction with the switch 30; specifically, the on / off state of the switch 30 can be changed by altering the displacement of the actuating part 42. When the user presses the operating part 41, the trigger 40 rotates around the second axis, causing the locking block 43 to disengage from the locking groove 52 and the actuating part 42 to move closer to the switch 30. During this process, the rigid support of the second rotating shaft 14 ensures the stability of the trigger 40's movement trajectory, preventing accidental triggering due to structural gaps.

[0043] When the stop 50 is in the locked position, the locking block 43 is located within the locking groove 52, the actuating part 42 is in the first position away from the switch 30, and the motor 20 is in the off state. When the stop 50 is in the unlocked position, the locking block 43 separates from the locking groove 52, and the actuating part 42 moves between the first and second positions. When the actuating part 42 is in the second position, cooperating with the switch 30, the motor 20 is in the start state. Specifically, when the stop 50 is in the locked position, the locking block 43 is located within the locking groove 52, forming a rigid constraint with the stop 50, and the trigger 40 cannot move at this time. The actuating part 42 is in the first position away from the switch 30, thus keeping the motor 20 in the off state. When it is necessary to start the motor 20, the user presses the stop to separate the locking block 43 from the locking groove 52. At this time, the user can pull the trigger 40 to move the actuating part 42 between the first and second positions. When the trigger 40 moves the actuating part 42 to the second position, the actuating part 42 cooperates with the switch 30 to control the motor 20 to start.

[0044] In practical applications, when the stop 50 is in the unlocked position and the user pulls the pressing part 51 of the trigger 40, the trigger 40 rotates around the second pivot 14, causing the second rotating plate 44 to compress the second torsion spring 12. This allows the trigger 40 to move the contact part 42 from the first position to the second position. When the contact part 42 is in the second position, engaging with the switch 30, the trigger motor 20 is activated. When the user stops pulling the trigger 40, the trigger 40, under the reset action of the second torsion spring 12, moves the contact part 42 back to the first position, thus controlling the motor 20 to be in the off state.

[0045] In an alternative implementation, the trigger 40 is further provided with a clearance notch 46 for the first pivot 13, the clearance notch 46 being used to avoid the first pivot 13 when the trigger 40 moves between the first position and the second position.

[0046] The clearance notch 46 refers to the groove or opening area provided on the trigger 40 structure. The clearance notch 46 is used to provide physical clearance space for the first pivot 13 during the movement of the trigger 40, so as to avoid collision or jamming between the two.

[0047] Specifically, when the user presses the trigger 40 to move it from the first position to the second position, the trigger 40 may interfere with the first pivot 13 due to the limited internal space of the housing 10. This embodiment addresses this by providing a clearance notch 46 in the trigger 40 structure, ensuring that the first pivot 13 remains within the notch range during trigger 40 movement. This prevents the trigger 40 from colliding with the first pivot 13, thus avoiding operational obstruction or structural damage, preventing internal component collisions due to accidental activation or excessive operating force, and reducing the risk of malfunctions caused by structural interference.

[0048] In an alternative implementation, the locking block 43 includes a connecting portion 431 and a locking portion 432. When the stop 50 is in the locked position, the locking portion 432 and the connecting portion 431 engage within the locking groove 52, causing the actuating portion 42 to be in a first position. When the trigger 40 moves between the first and second positions, the locking block 43 is located within the unlocked area. The clearance portion 57 is used to clear the connecting portion 431 when the stop 50 is in the unlocked position.

[0049] The connecting part 431 refers to the transition structure used to connect the locking block 43 and the trigger 40. The locking part 432 refers to the component that engages with the locking groove 52, and can be implemented using a metal block with a bevel or a wear-resistant plastic part. In the locked state, it restricts the displacement of the trigger 40 and the actuating part 42. In practical applications, the connecting part 431 and the locking part 432 can be an integral structure. The clearance part 57 refers to the notch structure provided on the stop member 50, which provides movement space for the connecting part 431 when the stop member 50 is in the unlocked position.

[0050] Specifically, when the stop 50 is in the locked position, the locking part 432 and the connecting part 431 engage within the lock groove 52, preventing the trigger 40 from being pulled, and the actuating part 42 is in the first position. When the tool needs to be operated, the user pulls the pressing part 51 of the stop 50 to release the stop 50 into the unlocked position, causing the trigger 40 to move the locking block 43 within the unlocked area, while the avoidance part 57 avoids the connecting part 431. During this process, the locking part 432 disengages from the lock groove 52, and the actuating part 42 moves between the first and second positions as the trigger 40 is pulled. By decomposing the locking block 43 into the connecting part 431 and the locking part 432, and providing a dedicated avoidance part 57 on the stop 50, the locking block 43 can be stably connected to the trigger 40 via the connecting part 431, and when the stop 50 is in the unlocked position, the avoidance part 57 can avoid the connecting part 431, thus improving the connection stability between the locking part 432 and the trigger 40.

[0051] In this embodiment, when the stop 50 is in the unlocked position, the locking block 43 is separated from the locking groove 52, allowing the user to move the trigger 40 to the contact part 42 between the first and second positions. When the contact part 42 is in the second position, which engages with the switch 30, the motor 20 is started. When the stop 50 is in the locked position, the locking block 43 is engaged in the locking groove 52, so that the trigger 40 and the contact part 42 are in the first position away from the switch 30, preventing the user from accidentally touching the trigger 40 and improving the safety and reliability of the power tool 100. Furthermore, after the user stops pulling the trigger 40, the trigger 40 can drive the contact part 42 back to the first position under the reset action of the second torsion spring 12, so as to control the motor 20 to be in the off state. When the user stops pulling the stop 50, the stop 50 can return to the locked position under the reset action of the first torsion spring 11, so as to prevent the user from accidentally triggering the motor 20. This allows the user to control the stop 50 to be in the locked position without moving their hand to find the stop 50 after stopping pulling the trigger 40, reducing the user's physical exertion and improving the operating comfort and safety of the power tool 100.

[0052] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application should fall within the scope of protection claimed by this application.

Claims

1. A power tool, characterized in that, The power tool includes a housing, a motor, a switch for controlling the start and stop of the motor, a trigger connected to the housing, and a stop. The trigger includes an operating part, an actuating part, and a locking block, wherein at least a portion of the operating part extends outside the housing, and the actuating part and the locking block are disposed inside the housing; The stop includes a pressing part and a locking groove, at least a portion of the pressing part extends out of the outer side of the housing, and the stop has a locked position and an unlocked position relative to the trigger; When the stop is in the locked position, the lock block is located in the lock groove, the actuating part is in the first position away from the switch, and the motor is in the off state; When the stop is in the unlocked position, the lock block separates from the lock groove, and the actuating part moves between the first position and the second position. When the actuating part is in the second position that cooperates with the switch, the motor is in the start state.

2. The power tool according to claim 1, characterized in that, The area swept by the actuating part between the first position and the second position is defined as the unlocking area. When the stop member is in the unlocking position, the lock block is located within the unlocking area, and the lock groove is located outside the unlocking area.

3. The power tool according to claim 2, characterized in that, The pivot of the trigger and the pivot of the stop are perpendicular to the unlocking area.

4. The power tool according to claim 2, characterized in that, The locking block includes a connecting part and a locking part; The stop member is provided with a clearance portion for the connecting portion; When the stop member is in the locked position, the locking part and the connecting part engage in the lock groove, so that the actuating part is in the first position; When the trigger moves between the first position and the second position, the locking block is located within the unlocking area; The avoidance part is used to avoid the connecting part when the stop is in the unlocked position.

5. The power tool according to claim 1, characterized in that, The power tool also includes a first rotating shaft, and the stop includes a first stop plate and a second stop plate; The first rotating shaft is disposed within the housing along the first axis. The first stop plate and the second stop plate are perpendicular to the first axis and are disposed parallel to the first rotating shaft. A receiving space for the actuating part is provided between the first stop plate and the second stop plate. The locking groove is disposed at a position of the first stop plate and the second stop plate near the receiving space.

6. The power tool according to claim 5, characterized in that, The first stop plate is provided with a spline, and the first rotating shaft is provided with a positioning groove for the spline. The spline on the first stop plate and the positioning groove on the first rotating shaft engage with each other.

7. The power tool according to claim 6, characterized in that, The second stop plate and the rotating shaft are integrally formed.

8. The power tool according to claim 5, characterized in that, The trigger is also provided with a clearance notch for the first rotating shaft; The clearance notch is used to avoid the first pivot when the trigger moves between the first position and the second position.

9. The power tool according to claim 5, characterized in that, The power tool also includes a second rotating shaft; The second rotating shaft is disposed inside the housing along the second axis, and the trigger is sleeved on the second rotating shaft.

10. The power tool according to claim 9, characterized in that, The first axis is not parallel to the second axis.

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