Power tool

Abstract

The utility model relates to an electric tool, include: holding part, for user holds, operating part, connect to holding part, operating part can move between first position and second position, positioning assembly, connect between operating part with holding part, to with holding part positioning operating part in first position or second position, positioning assembly includes located one on operating part with holding part elastic member and with elastic member connection or integral moulding's protruding block, and located other's limit slot, protruding block contains in limit slot with limit slot elasticity and abuts to with operating part positioning in first position or second position, thereby can free both hands in the process of electric tool operation, and comfortable and not easy to fatigue operation.

Description

Technical Field

[0001] This utility model relates to an electric tool. Background Technology

[0002] Hair dryers, as a common type of power tool, consist of a housing, a motor housed within the housing, a switch that controls the motor's start or speed, and a trigger for the user to operate the switch. When operating a hair dryer, users often need to continuously press the trigger to keep the hair dryer running, which is uncomfortable and can easily cause user fatigue.

[0003] Therefore, it is indeed necessary to provide an improved power tool to overcome the shortcomings of the existing technology. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a power tool that is comfortable to operate.

[0005] The present invention addresses the existing technical problems by adopting the following technical solution: an electric tool, comprising: a grip for a user to hold; an operating member connected to the grip, the operating member being movable between a first position and a second position; and a positioning component connected between the operating member and the grip to position the operating member relative to the grip at the first position or the second position; the positioning component includes an elastic member located on one of the operating member and the grip, a protrusion connected to or integrally formed with the elastic member, and a limiting groove located on the other, the protrusion being accommodated within the limiting groove and elastically abutting against the limiting groove to position the operating member at the first position or the second position.

[0006] A further improvement is as follows: the limiting groove is located on the operating member and includes a first limiting groove that limits the operating member to the first position and a second limiting groove that limits the operating member to the second position, with a partition portion between the first limiting groove and the second limiting groove.

[0007] A further improvement is that the second limiting groove is formed as a continuous groove in the moving direction of the operating member.

[0008] A further improvement is as follows: the operating member has a third position away from the second position, and the limiting groove includes a third limiting groove that restricts the operating member to be located in the third position and a number of gear grooves located between the second limiting groove and the third limiting groove.

[0009] A further improvement is as follows: the operating member has a moving plane, the gripping part includes a positioning post extending perpendicular to the moving plane, the elastic member is sleeved or accommodated in the positioning post, and the protrusion extends out of the positioning post.

[0010] A further improvement is as follows: the operating component includes an operating part for user operation and a limiting part connected to the operating part, the limiting part extending from the outer periphery of the operating part and the limiting groove located on the limiting part.

[0011] A further improvement is as follows: the operating member is rotatably connected to the gripping part about a rotation axis, and on the rotation axis, the width of the operating part is greater than the width of the limiting part.

[0012] A further improvement is as follows: the operating member includes a stop block located at the connection between the operating part and the limiting part, the width of the stop block along the rotation axis being greater than the width of the limiting part and less than or equal to the width of the operating part.

[0013] A further improvement is as follows: the gripping part includes a window through which the operating part passes and a positioning rib located at the inner edge of the window. The opposing surfaces of the stop block in the rotation direction of the operating member abut against the positioning post and the positioning rib respectively, so as to limit the rotation stroke of the operating member.

[0014] A further improvement is that the first limiting groove is located close to the stop and between the gear position and the second limiting groove.

[0015] Compared with the prior art, this utility model has the following advantages: by connecting the positioning component between the grip and the operating component, the operating component can be positioned without movement between the first position, the second position, the second and third positions, and the third position, thereby freeing the hands during the operation of the power tool, making operation comfortable and less tiring; in addition, the start, stop and speed adjustment of the motor are controlled by the magnetic element and the sensor assembly, and there is no connecting structure between the magnetic element and the sensor assembly, avoiding the risk of dust entering the interior and affecting the use of traditional microswitches. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a power tool according to a preferred embodiment of the present invention;

[0017] Figure 2 for Figure 1 A cross-sectional view of the power tool shown;

[0018] Figure 3 for Figure 2 A partially enlarged view of the control components installed on the grip.

[0019] Figure 4 for Figure 3 The diagram shows an exploded view of the control components and the grip.

[0020] Figure 5 for Figure 4 A schematic diagram showing the control components and grip from another angle;

[0021] Figure 6 for Figure 5 The diagram shows the structure of the control component.

[0022] Figure 7 for Figure 6 A breakdown diagram of the control components shown;

[0023] Figure 8 This is a schematic diagram showing the positions of the sensor assembly and magnetic components.

[0024] Meaning of the reference numerals in the diagram:

[0025] Hair dryer 100, housing 10

[0026] Airflow channel 11 Air inlet 12

[0027] Air outlet 13, grip 14

[0028] Holding area 141 Window 142

[0029] Positioning rib 143 Positioning groove 144

[0030] Positioning groove 145 Rotating groove 146

[0031] Fixing rib 147, slot 148

[0032] Step section 149 Support section 15

[0033] Joint 16 Power Component 20

[0034] Motor 21 Drive shaft 211

[0035] Fan 22 Control Component 30

[0036] Operating component 31, Operating unit 311

[0037] Fixing part 312 Limiting part 313

[0038] Stop 314 Rotating pin 315

[0039] Magnetic element 32 Sensor assembly 33

[0040] First sensor 331 Second sensor 332

[0041] Base plate 34 base 341

[0042] Extension 342 Clearance space 343

[0043] Frame 35, side wall 351

[0044] Bottom wall 352 Main control board 40

[0045] Positioning component 50 First positioning element 51

[0046] Elastic component 511, protrusion 512

[0047] Second positioning component 52, first limiting groove 521

[0048] Second limiting groove 522, partition part 523

[0049] Battery pack 200 Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0051] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," and "rear" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0052] Please refer to Figures 1 to 3 As shown, this utility model relates to a power tool, and more particularly to a hair dryer 100, including a housing 10 extending axially, a grip portion 14 connected to the housing 10, a power assembly 20 located within the housing 10, a control assembly 30 electrically connected to the power assembly 20, a main control board 40 for controlling the operating state of the power assembly 20, and a battery pack 200 detachably connected to the housing 10. The battery pack 200 is electrically connected to the power assembly 20 and the main control board 40 to provide power to the power assembly 20, and the control assembly 30, the main control board 40, and the power assembly 20 are electrically connected to control the operation of the power assembly 20.

[0053] The housing 10 includes an airflow channel 11 extending generally along the axial direction, and an air inlet 12 and an air outlet 13 located at both ends of the airflow channel 11 along the axial direction. The air inlet 12 passes through the rear end of the housing 10 along the axial direction, and the air outlet 13 passes through the front end of the housing 10 along the axial direction. The airflow channel 11 connects the air inlet 12 and the air outlet 13. The air inlet 12, the airflow channel 11, and the air outlet 13 are generally aligned in the axial direction.

[0054] The grip 14 is connected to the top side of the housing 10. The blower 100 also includes a support 15 connected to the lower side of the housing 10. The grip 14 is located above the airflow channel 11 and is spaced a certain distance from the housing 10 for the user to hold. The support 15 is located below the airflow channel 11 and is used to support the power tool on the ground or a work surface.

[0055] The grip portion 14 includes a first end connected to the housing 10, a second end axially spaced from the first end, and a gripping region 141 located axially between the first end and the second end. The grip portion 14 extends generally along the axial direction, and may extend parallel to the axial direction or extend at a certain angle relative to the axial direction.

[0056] The housing 10 includes a connecting portion 16 connected to the rear side of the second end of the grip portion 14, along which the battery pack 200 is detachably connected. The connecting portion 16 extends obliquely so that the battery pack 200 is obliquely and detachably connected to the housing 10.

[0057] The power unit 20 is located within the airflow channel 11 and includes a motor 21 housed within the housing 10 and a fan 22 connected to the motor 21. The motor 21 includes a drive shaft 211 extending axially, and the fan 22 includes a hub connected to the drive shaft 211 and fan blades extending from the hub. The fan 22 is located axially rear of the motor 21. The motor 21 drives the fan 22 to rotate and generate airflow. The airflow enters the airflow channel 11 from the air inlet 12, is pressurized by the rotation of the fan 22, flows axially along the airflow channel 11, and then flows out through the air outlet 13, forming a working airflow for blowing away leaves, gravel, or debris.

[0058] Combination Figures 4 to 6 As shown, the control assembly 30 is electrically connected to the motor 21 and includes an operating element 31 for user operation, a magnetic element 32, and a sensor assembly 33 that cooperates with the magnetic element 32. The operating element 31 is movably connected to the housing 10 or the grip portion 14, and includes a first position where the operating motor 21 is in a closed state, a second position where the operating motor 21 is in a started state, and a third position where the operating motor 21 is at its maximum speed. One of the magnetic element 32 and the sensor assembly 33 is connected to the operating element 31 and moves with the operating element 31 relative to the other of the magnetic element 32 and the sensor assembly 33 between the first position, the second position, and the third position.

[0059] The sensor assembly 33 includes a first sensor 331 that cooperates with the magnetic element 32 to start the motor 21 and a second sensor 332 that cooperates with the magnetic element 32 to adjust the speed of the motor 21. The first sensor 331 and the second sensor 332 always remain in operation between the second position and the third position.

[0060] The term "maintaining working state" here means that, from the second position to the third position (inclusive), the first sensor 331 remains activated after being activated by the magnetic element 32, ensuring that the motor 21 is continuously running. Alternatively, the second sensor 332 also remains activated after being activated by the magnetic element 32, adjusting the speed of the motor 21 accordingly as the position of the operating member 31 changes. In other words, during the transition from the second to the third position, the first sensor 331 and the second sensor 332 remain activated and perform different functions, eliminating the need for phased activation of each sensor and ensuring continuous speed regulation while maintaining a simple programming function.

[0061] The operating element 31 is located on or near the grip area 141 of the holding part 14, allowing the user to operate the hair dryer 100 with one hand while holding it. The operating element 31 can be located on the top, side, or bottom of the grip part 14, as long as it is within the area where the user can easily operate it while holding it.

[0062] To further facilitate user operation, the initial movement (translation or rotation) direction of the operating element 31 can be parallel to the extension direction of the grip portion 14. This mainly depends on the structure of the operating element 31. In this embodiment, the operating element 31 is disposed on the top side of the grip portion 14. It can be a push button that moves along the extension direction of the grip portion 14, or a knob or trigger that is rotatably connected to the grip portion 14. Regardless of whether it is a push button, knob, or trigger structure, its initial movement direction is configured to be parallel to the extension direction of the grip portion 14. By configuring its initial movement direction to be parallel to the extension direction of the grip portion 14, the user can easily operate the operating element 31 with their thumb or forefinger in the direction of hand grip when holding the grip portion 14, which conforms to ergonomics.

[0063] The aforementioned "initial movement direction" refers to the pre-movement direction of the operating component 31 when the user moves the operating component 31. If the operating component 31 is a translational structure, its initial movement direction is the direction of its movement; if the operating component 31 is a rotational structure, its initial movement direction is the tangential direction of the rotation at the beginning of the rotation.

[0064] In the moving direction of the operating member 31, the first position, the second position, and the third position are arranged at intervals. When the operating member 31 moves from the first position to the second position, the magnetic element 32 activates the first sensor 331 to make the motor 21 enter the starting state from the off state, and cooperates with the second sensor 332 to make the motor 21 run at the first speed. When the operating member 31 moves from the second position to the third position, the magnetic element 32 cooperates with the second sensor 332, and the speed of the motor 21 gradually increases from the first speed, and reaches the maximum speed when it moves to the third position.

[0065] In the direction of movement of the operating member 31, the distance between the first position and the second position is less than the distance between the third position and the second position. The operating member 31 is positioned at any of the first, second, and third positions without the action of external force. The movement of the operating member 31 can be a translation along a straight line or a rotation about a rotation axis.

[0066] In this embodiment, the operating member 31 is rotatably connected to the gripping part 14 about a rotation axis, and includes an operating part 311 for user operation, a fixing part 312 connected to the operating part 311 in the rotation direction, and a limiting part 313 extending radially from the fixing part 312. The operating part 311 and the fixing part 312 are integrally formed and constitute a knob structure. The outer edge of the operating part 311 is provided with several arrows for indicating the rotation direction and several transversely arranged ribs, thereby facilitating stable operation by the user.

[0067] Along the rotation axis of the operating member 31, the width of the fixing part 312 and the limiting part 313 is smaller than the width of the operating part 311 so as to form a recessed space on one side of the fixing part 312. The width of the operating part 311 is set to be greater than the width of the fixing part 312 in order to widen the lateral operating area of ​​the operating part 311, so that the user can operate more comfortably and stably.

[0068] The grip 14 is formed by two housings mounted together and has a receiving space therein, in which the operating member 31 is at least partially received. The grip 14 includes a window 142 through which the operating member 311 passes and positioning ribs 143 located on opposite sides of the window 142 in the rotation direction of the operating member 31. The operating member 311 partially passes through the window 142 for user operation.

[0069] The hair dryer 100 includes a positioning assembly 50 for positioning the operating member 31 in a first position, a second position, a third position, or between the second and third positions. The positioning assembly 50 is connected between the operating member 31 and the grip portion 14, and includes a first positioning member 51 connected to or integrally formed with the grip portion 14 and a second positioning member connected to or integrally formed with the operating member 31. The first positioning member 51 and the second positioning member 52 cooperate to position the operating member 31 in the first position, the second position, or the third position.

[0070] Combination Figure 7 and Figure 8As shown, the first positioning member 51 includes an elastic member 511 and a protrusion 512 connected to the elastic member 511, and the second positioning member 52 includes at least one limiting groove that mates with the protrusion 512. The elastic member 511 and the protrusion 512 are connected to one of the operating member 31 and the gripping part 14, and the limiting groove is located on the other of the operating member 31 and the gripping part 14. Under the bias of the elastic member 511, the protrusion 512 is accommodated in the limiting groove and elastically abuts against the limiting groove to position the operating member 31 in a first position, a second position, or a third position.

[0071] The protrusion 512 can be a pin or a steel ball with a head. In other embodiments, the first positioning member 51 can also be a resilient metal sheet, the metal sheet including a foot fixed to the grip portion and a protrusion extending from the foot, and the second positioning member 52 is configured as a plurality of limiting grooves that cooperate with the protrusion.

[0072] The operating member 31 has a movable plane, and the gripping part 14 includes a positioning post 144 located within the receiving space and extending perpendicularly from the inner peripheral wall of the gripping part 14 to the movable plane, and a positioning groove 145 located within the positioning post 144. The elastic member 511 is sleeved on the outer periphery of the positioning post 144 or accommodated in the positioning groove 145. The protrusion 512 extends out of the positioning post 144 to cooperate with the limiting groove, thereby positioning the operating member 31 between the operating member 31 and the gripping part 14.

[0073] The limiting portion 313 is located on the outer periphery of the fixing portion 312 and is disposed close to the operating portion 311 in the rotation direction, and protrudes radially from the outer periphery of the fixing portion 312. The operating member 31 also includes a stop 314 located at the connection between the operating portion 311 and the limiting portion 313. Along the rotation axis of the operating member 31, the width of the stop 314 is greater than the width of the limiting portion 313 and the fixing portion 312 and less than or equal to the width of the operating portion 311, and the width of the fixing portion 312 is equal to the width of the limiting portion 313.

[0074] The operating member 31 includes a rotating pin 315 located between the operating part 311 and the fixing part 312. The gripping part 14 has a rotating groove 146 extending from its inner peripheral wall to the receiving space. The rotating pin 315 is received in the rotating groove 146 so that the operating member 31 can rotate relative to the gripping part 14 about the rotation axis. The operating part 311 and the fixing part 312 are arranged around the outer periphery of the rotating pin 315 and connected to each other in the rotation direction. The positioning post 144 is located outside the rotating groove 146 and the distance between the positioning post 144 and the rotating groove 146 is greater than the distance between the operating part 311 and the rotating groove 146, so that the positioning post 144 can cooperate with the stop 314 protruding from the outer periphery of the operating part 311.

[0075] Viewed along the rotation axis, the positioning post 144 overlaps with the limiting part 313. The limiting groove is located in the area of ​​the limiting part 313 that overlaps with the positioning post 144, so that when the operating member 31 rotates, the first positioning member 51 provided on the positioning post 144 can cooperate with the second positioning member 52 provided on the limiting part 313 to fix the operating member 31. The limiting groove includes a first limiting groove 521 that fixes the operating member 31 in a first position and a second limiting groove 522 that is spaced apart from the first limiting groove 521. The first limiting groove 521 is provided close to the stop block 314 and is located between the stop block 314 and the second limiting groove 522.

[0076] A partition 523 is spaced between the first limiting groove 521 and the second limiting groove 522, so that when the protrusion 512 moves from the first limiting groove 521 to the second limiting groove 522 under the bias of the elastic member 511, it jumps over the partition 523 and makes a "click" sound, thereby providing the user with a sense of the gear position and informing the user that the hair dryer 100 has entered the start-up state from the off state.

[0077] When the operating member 31 is in the first position, the protrusion 512 is accommodated in the first limiting groove 521, and the side surface of the stop block 314 away from the operating part 311 abuts against the positioning post 144, thereby preventing the operating member 31 from rotating in the opposite direction to the rotation direction. When the operating member 31 is in the second position and leaves the second position, the protrusion 512 moves from the first limiting groove 521 to one end of the second limiting groove 522, and the stop block 314 leaves the positioning post 144. Through the cooperation of the protrusion 512 and the second limiting groove 522, the operating member 31 can stay in any position between the second position and the third position without external force. When the operating member 31 is in the third position, the protrusion 512 moves from the end of the second limiting groove 522 near the first limiting groove 521 to the other end away from the first limiting groove 521, and the side surface of the stop block 314 near the operating part 311 abuts against the positioning rib 143 of the grip part 14, thereby preventing the operating member 31 from rotating further. The opposing surfaces of the stop block 314 in the moving direction of the operating member 31 abut against the positioning post 144 and the positioning rib 143 respectively, thereby limiting the moving stroke of the operating member 31.

[0078] The second limiting groove 522 forms a continuous groove in the moving direction of the operating member 31. Under the action of the positioning component 50, the operating member 31 can stay at any position, so that the speed of the motor 21 can gradually increase from the second position to the third position. It also makes it convenient for the user to free up the fingers of the operating member 31 after adjusting to a suitable speed, thus reducing fatigue.

[0079] Of course, the limiting groove can also be set as several grooves spaced apart. For example, a third limiting groove can be set at a third position away from the second position to fix the operating member 31 in the third position. There are several gear grooves between the second limiting groove 522 and the third limiting groove. The protrusion 512 is respectively accommodated in several gear grooves, thereby distinguishing the speed of the motor 21. The protrusion 512 is accommodated in the gear groove, which can also position the operating member 31 at a certain speed gear, thereby improving the user's operating comfort.

[0080] The control assembly 30 includes a base plate 34 electrically connected to the motor 21, a frame 35 sleeved on the outer periphery of the base plate, a sensor assembly 33 located on the base plate 34, and a magnetic element 32 cooperating with the sensor assembly 33. The grip portion 14 includes a fixing rib 147 extending from its inner sidewall along the rotation axis of the operating member 31 into a receiving space, and a fixing space formed by the fixing rib 147, within which the frame 35 is located. The base plate 34 is electrically connected to the motor 21 via a cable (not shown), and the fixing rib 147 has a slot 148 for the cable to pass through. The positioning post 144 is located outside the fixing space and is positioned behind the fixing space in the rotation direction of the operating member 31.

[0081] The substrate 34 is located within the grip portion 14 and fixed within the frame 35, and includes a base 341, an extension 342 extending from the base 341 toward the rotation groove 146, and a clearance space 343 formed by the outer walls of the base 341 and the extension 342. Viewed along the rotation axis, the extension 342 of the substrate 34 extends between the fixing portion 312 and the inner sidewall of the grip portion 14 and at least partially overlaps with the operating member 31. The operating member 31 extends at least partially into the clearance space 343 in the direction along the rotation axis. That is, viewed radially perpendicular to the rotation axis of the operating member 31, the operating member and the clearance space 343 at least partially overlap, and at least a portion of the operating portion 311 of the operating member 31 is located within the clearance space 343 at at least one of the first, second, or third positions. This ensures that the sensor assembly 33 is located within the magnetic field region of the magnetic element 32 while preventing interference between the operating member 31 and the substrate 34 during rotation.

[0082] Along the rotation axis of the operating member 31, the widths of the fixing portion 312 and the limiting portion 313 are smaller than the width of the operating portion 311, forming a recessed space on one side of the fixing portion 312 and the limiting portion 313, within which the extension portion 342 of the substrate 34 is located. The portion of the operating portion 311 wider than the fixing portion 312 extends into the clearance space 343 along the rotation axis.

[0083] In the rotation direction of the operating member 31, the clearance space 343 is located in front of the extension 342, and the portion of the operating member 311 extending beyond the fixing portion 312 is at least partially located within the clearance space 343 in the third position. Furthermore, in the rotation direction of the operating member 31, the operating member 311 has a first end and a second end disposed opposite to each other, and the extension 342 is located between the first end and the second end. The first end is located within the clearance space 343 when the operating member 31 is in the third position. By providing the clearance space 343 on the base plate 34, the operating member 311 does not interfere with the base plate 34 during rotation while ensuring a comfortable operating width. This simplifies the structure and helps reduce the size of the operating member and control components, thereby reducing the size of the grip and making it easier for the user to hold.

[0084] The frame 35 is shaped to correspond to the shape of the substrate 34, including a side wall 351 fixed within the fixing rib 147 and a bottom wall 352 covering the fixing space. The substrate 34 is located within the space enclosed by the side wall 351 and the bottom wall 352. Along the rotation axis, the length of the fixing rib 147 is greater than the length of the side wall 351, and the fixing rib 147 has a stepped portion 149 extending into the fixing space at a position corresponding to the length of the side wall 351. The side wall 351 abuts against the stepped portion 149 to form a gap between the frame 35 and the inner side wall 351 of the grip portion 14 for cable passage. After the cable extends from the substrate 34 out of the frame 35, it is guided through this gap to the slot 148 of the fixing rib 147, and then electrically connected to the motor 21 along the grip portion 14.

[0085] The side walls 351, bottom wall 352, and inner peripheral wall of the grip portion 14 of the frame 35 form a space for accommodating the substrate 34 and sensor assembly 33. The bottom wall 352 of the frame covers this space, thereby preventing dust from entering the frame 35. Furthermore, both opposite surfaces of the substrate 34 are encapsulated with potting compound, preventing dust from entering and achieving a dustproof effect. Moreover, the first sensor 331 and the second sensor 332 are soldered to the substrate 34, and both are equipped with additional protective shells, further preventing dust from entering their interiors.

[0086] The substrate 34 includes a first surface facing the bottom wall 352 and a second surface opposite to the first surface, with one end of a cable connected to the second surface. The rotation axis of the operating member 31 is perpendicular to the substrate 34, and the extension 342 and the clearance space 343 are located between the base 341 and the rotation axis, such that the extension 342 extends into the upper side of the fixing part 312 in the direction along the rotation axis.

[0087] In this embodiment, the operating member 31 is rotatably connected to the grip portion 14 about a rotation axis. In other embodiments, the operating member 31 may also be translatably connected to the grip portion 14 along a straight line. Furthermore, this invention uses a hair dryer 100 as an example, where the housing 10 and grip portion 14 of the hair dryer 100 are integrally formed. However, in other power tools, the housing 10 may include an outer shell and a grip portion 14 connected to the outer shell, with the motor 21 installed inside the outer shell, and the operating member 31 connected to the grip portion 14. The outer shell and grip portion 14 may be integrally formed or a separate structure connected by other structures (such as an extension rod).

[0088] Magnetic element 32 is connected to the fixing portion 312 of operating member 31. Sensor assembly 33 is mounted on substrate 34 and located within grip portion 14. Further, sensor assembly 33 includes a first sensor 331 and a second sensor 332 located on an extension 342 of substrate 34. Viewed along the rotation axis, extension 342 at least partially overlaps with fixing portion 312 of operating member, such that the first sensor 331 and second sensor 332 at least partially overlap with magnetic element 32 fixed to fixing portion 312 and are located within the magnetic field region of magnetic element 32.

[0089] The first sensor 331 is connected to the second surface of the substrate 34 away from the operating member 31, the second sensor 332 is connected to the first surface of the substrate 34 facing the operating member 31, and the magnetic element 32 is connected to the fixing part 312 of the operating member 31 and is located on the side of the fixing part 312 away from the substrate 34.

[0090] A mounting groove is recessed on the side of the fixing portion 312 away from the extension portion 342, and the magnetic element 32 is fixedly connected in the mounting groove. The magnetic element 32 has an extension region in the moving direction of the operating member 31, that is, one end of the magnetic element 32 is the N pole and the other end is the S pole in the rotation direction, and the magnetic element 32 has a length L extending along the N and S poles. The first sensor 331 and the second sensor 332 are located in the extension region of the magnetic element 32 in the moving direction of the operating member 31, that is, the extension portion 342 of the substrate 34 mounting the first sensor 331 and the second sensor 332 is located in the extension region in the moving direction of the operating member 31.

[0091] The magnetic element 32 is symmetrically arranged on the fixed part 312 about a midline X. When the operating member 31 moves under the operation of the user, the magnetic element 32 changes its relative position with the first sensor 331 and the second sensor 332 as the operating member 31 moves.

[0092] The magnetic element 32 is configured as a magnet. If the operating member 31 moves along a straight line, the magnetic element 32 is configured as a straight magnet extending along that straight line; if the operating member 31 rotates along the aforementioned rotation axis, the magnetic element 32 is configured as an arc-shaped structure extending along that rotation direction, as long as it can move with the operating member 31 and activate the sensor assembly 33.

[0093] The magnetic element 32 has a first end (N pole) and a second end (S pole) located on opposite sides of the dividing line X. The substrate 34 connects the extension 342 of the first sensor 331 and the second sensor 332 and is located between the first end and the second end in the rotation direction of the operating member 31.

[0094] The magnetic element 32 has a magnetic coverage area, which includes a first strong magnetic region, a transition region, and a second strong magnetic region arranged sequentially in the direction of movement (translation or rotation) of the operating member 31. The first sensor 331 is located within the transition region in the rotation direction of the operating member 31. The transition region is configured as a region offset by 0-0.25L from the center line toward the first end and the second end, respectively.

[0095] In this embodiment, the magnetic element 32 is configured as an arc-shaped structure, the center of which coincides with the rotation axis, i.e., the rotation axis passes through the center of the magnetic element 32. The midline X of the magnetic element 32 also passes through this center. The arc angle formed by the arc structure of the magnetic element 32 is between 80° and 160° (inclusive of the endpoint). The magnetic element 32 is mounted on the fixing part 312, and the extension length L of the magnetic element 32 in the rotation direction of the operating member 31 is not less than the rotation stroke of the operating member 31. This ensures that the rotation angle of the operating member 31 is sufficient to adjust the required maximum speed while preventing the magnetic element 32 from rotating out of the window 142 of the gripping part 14.

[0096] The magnetic field of the magnetic element 32 is stronger closer to the first end (N pole) or the second end (S pole) (first and second strong magnetic regions), and weaker closer to the midline of the magnetic element 32 (transition region). The first sensor 331 is correspondingly placed in the transition region, that is, in the region where the midline X of the magnetic element 32 is offset to the opposite sides by 0-0.25L, 0-0.2L, 0-0.15L, or 0-0.1L, respectively. The magnetic field strength in this region is insufficient to activate the first sensor 331. At this time, the operating member 31 is in the first position, and the motor 21 is in the off state.

[0097] The second sensor 332 is located between the first sensor 331 and either the first or second end in the direction of movement of the operating member 31. Specifically, the first sensor 331 is located in front of the second sensor 332 in the direction of rotation of the operating member 31. The first sensor 331 is a reed switch element, and the second sensor 332 is a Hall element.

[0098] Depending on the intensity of magnetization and the structure of the magnet, the proportion of the transition zone will change accordingly. The magnetic element 32 is configured as an arc-shaped structure. The first sensor 331 is preferably located in the region where the center line X is deflected to opposite sides by 0-30°, 0-25°, 0-20°, or 0-10° along the rotation direction of the operating member 31. The magnetic field strength in this region is low and cannot activate the first sensor 331, ensuring that the motor 21 is in the off state when the operating member 31 is in the first position. Furthermore, the first sensor 331 can be directly placed on the center line X, that is, when viewed along the rotation axis of the operating member 31, the first sensor 331 coincides with the center line X.

[0099] When the user rotates the operating part 311, the operating part 31 moves relative to the housing 10 or the grip part 14. The protrusion 512, biased by the elastic member 511, crosses the partition part 523 from the first limiting groove 521 and enters the second limiting groove 522, making a "click" sound. At the same time, the magnetic element 32 rotates relative to the first sensor 331 and the second sensor 332 with the fixing part 312. After the first sensor 331 leaves a certain area of ​​the midline X of the magnetic element 32, it changes from the original weak magnetic field transition area to a stronger magnetic field area. The first sensor 331 is activated, and the motor 21 enters the start state from the off state. In addition, since the second sensor 332 is located behind the first sensor 331 in the rotation direction, the second sensor 332 is activated at the same time as the first sensor 331 is activated. The main control board 40 collects the signal transmitted by the second sensor 332 and controls the motor 21 to rotate at the first speed.

[0100] The user continues to rotate the operating part 311, and the protrusion 512 moves along the second limiting groove 522 that forms a continuous groove. The magnetic element 32 continues to rotate relative to the first sensor 331 and the second sensor 332. The first sensor 331 leaves the above-mentioned area and enters a position where the magnetic field strength gradually increases. The first sensor 331 is always in an activated state. The magnetic field strength corresponding to the position of the second sensor 332 also gradually increases. The main control board 40 collects the signal transmitted by the second sensor 332 and controls the speed of the motor 21 to gradually increase. At this time, the operating part 31 can be positioned at any position between the second position and the third position under the action of the positioning component 50, and the speed of the motor 21 increases accordingly.

[0101] Of course, if multiple gear slots are provided between the second and third positions, the protrusion 512 biased by the elastic member 511 can be accommodated in any gear slot, so that the operating member 31 can be positioned at any intermediate speed gear. The main control board 40 collects the signal of the second sensor 332 at that position and controls the motor 21 to run at the corresponding speed gear.

[0102] When the user rotates the operating component 31 to the third position, the protrusion 512 moves to the end of the second limiting groove 522, and the first sensor 331 and the second sensor 332 approach the first strong magnetic area or the second strong magnetic area of ​​the magnetic element 32. The first sensor 331 is still in the activated state, and the magnetic field strength corresponding to the second sensor 332 reaches its strongest. The main control board 40 collects the signal transmitted by the second sensor 332 and controls the motor 21 to run at its maximum speed. At this time, the operating component 31 is positioned in the third position under the action of the positioning component 50, and the stop block 314 abuts against the positioning rib 143 at the window 142 to prevent the operating component 31 from rotating further, and the motor 21 reaches its maximum speed.

[0103] This invention controls the start, stop, and speed adjustment of the motor 21 through a magnetic element 32 and a sensor assembly 33. There is no connecting structure between the magnetic element 32 and the sensor assembly 33, avoiding the risk of dust entering the motor and affecting its use, which is common with traditional microswitches. A knob drives the magnetic element 32 to simultaneously activate the first sensor 331 and the second sensor 332, respectively, to achieve different functions such as start-up and speed adjustment. The structure is simple and easy to operate. In addition, the positioning assembly 50 connected between the grip 14 and the operating member 31 enables the operating member 31 to be positioned in the first position, the second position, the second and third positions, and the third position. This frees up the hands during the operation of the power tool, making operation comfortable and less tiring.

[0104] This utility model is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions exist for the power tools of this utility model without departing from the principles and scope thereof. The scope of protection of this utility model is defined by the claims.

Claims

1. An electric tool, comprising: The grip section is for the user to hold. An operating element is connected to the gripping portion, and the operating element is movable between a first position and a second position; A positioning component is connected between the operating member and the gripping portion to position the operating member relative to the gripping portion at the first position or the second position; The positioning component is characterized in that: the positioning component includes an elastic element located on one of the operating member and the gripping part, a protrusion connected to or integrally formed with the elastic element, and a limiting groove located on the other, wherein the protrusion is accommodated in the limiting groove and elastically abuts against the limiting groove to position the operating member at the first position or the second position.

2. The power tool of claim 1, wherein: The limiting groove is located on the operating member and includes a first limiting groove that limits the operating member to the first position and a second limiting groove that limits the operating member to the second position, with a partition portion between the first limiting groove and the second limiting groove.

3. The power tool of claim 2, wherein: The second limiting groove is configured as a continuous groove in the moving direction of the operating member.

4. The power tool according to claim 2, characterized in that: The operating member has a third position away from the second position, and the limiting groove includes a third limiting groove that restricts the operating member to the third position and a plurality of gear grooves located between the second limiting groove and the third limiting groove.

5. The power tool according to claim 2, characterized in that: The operating member has a movable plane, the gripping part includes a positioning post extending perpendicular to the movable plane, the elastic member is sleeved or accommodated in the positioning post, and the protrusion extends out of the positioning post.

6. The power tool according to claim 5, characterized in that: The operating component includes an operating part for user operation and a limiting part connected to the operating part. The limiting part extends from the outer periphery of the operating part and the limiting groove is located on the limiting part.

7. The power tool according to claim 6, characterized in that: The operating member is rotatably connected to the gripping part about a rotation axis, and the width of the operating part is greater than the width of the limiting part on the rotation axis.

8. The power tool according to claim 7, characterized in that: The operating element includes a stop block located at the connection between the operating part and the limiting part. The width of the stop block along the rotation axis is greater than the width of the limiting part and less than or equal to the width of the operating part.

9. The power tool according to claim 8, characterized in that: The gripping part includes a window through which the operating part passes and a positioning rib located at the inner edge of the window. The opposing surfaces of the stop block in the rotation direction of the operating part abut against the positioning post and the positioning rib respectively to limit the rotation stroke of the operating part.

10. The power tool according to claim 8, characterized in that: The first limiting groove is located close to the stop and between the stop and the second limiting groove.

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