Electric tool

Abstract

The invention discloses an electric tool which comprises a controller arranged in a machine shell and used for controlling a motor to rotate; the at least one micro force sensor is used for detecting at least one of a parameter of deformation quantity of a preset part of the output part or a parameter of a force value applied to the preset part of the output part; the controller is connected with the micro force sensor, and the controller is configured to obtain a detection numerical value of the micro force sensor, determine the actual output torque of the electric tool according to the detection numerical value, and determine the running state of the motor according to the comparison result of the actual output torque and the preset torque. According to the electric tool, the micro force sensor is used, and safety is high.

Description

Technical Field

[0001] The present application relates to the field of power tools, and more particularly to an electric tool. Background Art

[0002] In the related art, in electric tools, battery packs, and charging devices, there are increasingly high requirements for the safety and control accuracy of products. Therefore, more and more various electronic control components are used. Then, the more electronic control components there are, the more power consumption and the larger space occupied.

[0003] This section provides background information related to the present application, and these background information are not necessarily prior art. This section provides background information related to the present application, and these background information are not necessarily prior art. Summary of the Invention

[0004] An object of the present application is to solve or at least mitigate part or all of the above problems. To this end, an object of the present application is to provide an electric tool that uses a low-power and precisely controlled micro force sensor to control the working state.

[0005] To achieve the above object, the present application adopts the following technical solutions: An electric tool, comprising: a housing; a motor disposed within the housing, the motor configured to rotatably drive an output portion coupled to the motor; a controller disposed within the housing for controlling the rotation of the motor; at least one micro force sensor for detecting at least one of a parameter of the deformation amount of a preset portion of the output portion or a parameter of the force value applied to the preset portion of the output portion; the controller is connected to the micro force sensor, and the controller is configured to: obtain the detection value of the micro force sensor, determine the actual output torque of the electric tool according to the detection value, and determine the operating state of the motor according to the comparison result between the actual output torque and the preset torque.

[0006] In some embodiments, the detection value includes at least one of: a parameter of the deformation amount of a preset portion of the output portion, a parameter of the force value, a change rate of the parameter of the deformation amount, or a change rate of the parameter of the force value.

[0007] In some embodiments, the output portion includes: an output mechanism including an output shaft for connecting a working accessory and driving the working accessory to rotate.

[0008] In some embodiments, the output mechanism includes an output housing that supports the output shaft, and the preset portion is at least partially disposed on the output housing or the output shaft.

[0009] In some embodiments, the output unit includes: an output mechanism including an output shaft for connecting a working attachment and driving the working attachment to rotate; a transmission mechanism disposed between the motor and the output mechanism for transmitting power between the motor and the output mechanism, and at least a part of the preset part is disposed on the transmission mechanism.

[0010] In some embodiments, the transmission mechanism includes a target member for receiving the load torque of the output shaft and at least one of making the parameter of the deformation amount of the preset part or applying pressure to the preset part.

[0011] In some embodiments, the transmission mechanism includes a planetary gear assembly. The planetary gear assembly includes an internal gear ring, and the target member is abutted by the internal gear ring, and the internal gear ring applies torque to the target member.

[0012] In some embodiments, the micro-force sensor detects at least one of the parameter of the deformation amount of the preset part or the parameter of the force value. The controller determines the torque applied by the internal gear ring to the target member. When the controller determines that the torque applied by the internal gear ring to the target member is greater than the preset torque threshold, the controller controls the motor to operate in a preset manner.

[0013] In some embodiments, the micro-force sensor obtains the parameter of the deformation amount of the output shaft to determine the output torque of the output shaft. When the controller determines that the output torque of the output shaft is greater than the preset torque, the controller controls the motor to stop or operate at a reduced speed.

[0014] In some embodiments, the preset torque is set by a torque setting unit. The torque setting unit includes a torque cup. The torque cup includes a sensor and an actuating sleeve. The actuating sleeve is operably rotated around the output shaft for the user to set. The sensor sends a corresponding signal to the controller according to the rotation of the actuating sleeve, and the controller confirms the preset torque according to the signal of the sensor.

[0015] In some embodiments, the size of the micro-force sensor is less than or equal to 3 mm.

[0016] In some embodiments, the measurement frequency of the micro-force sensor is greater than or equal to 500 Hz.

[0017] In some embodiments, the working current of the micro-force sensor is less than or equal to 10 mA.

[0018] An electric tool, comprising: a housing; a motor disposed within the housing, the motor configured to drive an output shaft to rotate; a controller disposed within the housing, the controller controlling the rotation of the motor; an actuating sleeve operably rotatable about the output shaft for a user to set a torque threshold, when the actuating sleeve rotates, the actuating sleeve generates an axial displacement along a direction parallel to the extension direction of the output shaft; a micro force sensor configured to detect at least one of a parameter of the deformation amount of a preset part of the actuating sleeve or a parameter of the applied force value when the actuating sleeve rotates, a force receiving surface of the micro force sensor intersects the output shaft; the controller is connected to the micro force sensor, and the controller is configured to: obtain the detection value of the micro force sensor, and determine the torque threshold according to the obtained detection value, and the controller controls the operating state of the motor according to the torque threshold.

[0019] In some embodiments, the electric tool includes a torque setting portion, and the torque setting portion includes: an actuating sleeve and a micro force sensor; and further includes: an elastic member for applying a corresponding force to the micro force sensor when the actuating sleeve rotates and axially displaces in a direction parallel to the extension direction of the output shaft.

[0020] In some embodiments, when the controller determines that the output torque of the output shaft is greater than the torque threshold, it controls the motor to stop or operate at a reduced speed.

[0021] In some embodiments, the preset torque is set through a torque setting portion, and the torque setting portion includes a human-computer interaction component for receiving an operation instruction of a user and sending an operation instruction signal to the controller, and the controller confirms the preset torque.

[0022] In some embodiments, the preset torque is set through a torque setting portion, and the torque setting portion includes a communication portion and an external device, the communication portion is used for receiving an operation signal of the external device, and the controller confirms the preset torque according to the operation signal of the external device.

[0023] In some embodiments, when the gap between the force value and the reference value is greater than or equal to a first threshold, the controller determines that an external force of the user is applied to the force receiving surface and executes related functions.

[0024] In some embodiments, the reference value is relative to a baseline.

[0025] In some embodiments, the controller is further configured to update the baseline at a predetermined frequency.

[0026] In some embodiments, the controller updates the baseline by comparing the force value with an auto-calibration threshold.

[0027] In some embodiments, a buffer member is disposed between the force receiving surface and the micro force sensor, and the buffer member includes rubber or silica gel.

[0028] In some embodiments, a circuit board is disposed between the buffer member and the micro force sensor, and the micro force sensor is integrated on the circuit board. A handheld power tool includes: a housing; a grip portion formed or connected to the housing; a motor disposed within the housing, the motor configured to rotatably drive an output portion coupled to the motor; a controller disposed within the housing for controlling the operation of the motor; at least one micro force sensor for detecting at least one of a parameter of a deformation amount of a preset portion of the grip portion or a parameter of a force value applied to the preset portion of the grip portion; the controller is connected to the micro force sensor, and the controller is configured to: determine a detection value of the micro force sensor and control the operating state of the motor according to the detection value, wherein the detection value includes at least one of a parameter of a deformation amount of a preset portion of the grip portion, a parameter of a force value, a change rate of the parameter of the deformation amount, or a change rate of the parameter of the force value.

[0029] In some embodiments, the grip portion includes a force-receiving surface for receiving an external force and generating different deformations when the external force changes, and the micro force sensor is disposed within the grip portion.

[0030] In some embodiments, the grip portion includes a first grip portion and a second grip portion, and at least one of the first grip portion and the second grip portion is provided with a micro force sensor.

[0031] In some embodiments, the handheld power tool includes a handheld cutting tool. In some embodiments, the controller is configured to: when the detection value of the micro force sensor exceeds a threshold, the controller determines that the handheld cutting tool has recoiled, and the controller restricts the operation of the motor, and the detection value includes at least one of a parameter of a deformation amount of a preset portion of the grip portion, a parameter of a force value, a change rate of the parameter of the deformation amount, or a change rate of the parameter of the force value.

[0032] In some embodiments, the handheld power tool includes a handheld rotary output tool. In some embodiments, the controller is configured to: when the detection value of the micro force sensor exceeds a threshold, the controller determines that the user's gripping force is insufficient to control the handheld rotary output tool, and the controller restricts the operation of the motor, and the detection value includes at least one of a parameter of a deformation amount of a preset portion of the grip portion, a parameter of a force value, a change rate of the parameter of the deformation amount, or a change rate of the parameter of the force value.

[0033] In some embodiments, the micro force sensor is disposed within the housing.

[0034] An electric tool, comprising: a motor configured to rotatably drive an output part coupled to the motor; a trigger for obtaining a user input instruction; at least one micro force sensor disposed near the trigger and configured to detect at least one of a parameter of a deformation amount of a preset part or a parameter of a force value applied when the trigger is activated and undergoes a stroke; and a controller connected to the micro force sensor, obtaining at least one of the parameter of the deformation amount or the parameter of the force value of the micro force sensor, and determining a target parameter of the motor according to the detection data of the micro force sensor.

[0035] In some embodiments, the trigger includes: a contact part that contacts a user's finger; a linkage part that deforms a preset part or applies a force value to the preset part; and a controller connected to the micro force sensor, obtaining at least one of the parameter of the deformation amount or the parameter of the force value detected by the micro force sensor, and determining the rotation direction and target parameter of the motor according to the detected parameter of the deformation amount or the parameter of the force value of the micro force sensor.

[0036] An electric tool, comprising: a housing; a motor disposed within the housing, the motor being configured to rotatably drive an output part coupled to the motor; a controller disposed within the housing for controlling the rotation of the motor; wherein the output part includes an accessory for processing a workpiece, and at least one micro force sensor configured to detect at least one of a parameter of a deformation amount of at least one preset part of the accessory or the workpiece or a parameter of a force value applied; the controller is connected to the at least one micro force sensor and is configured to: determine the state of the accessory or the workpiece according to at least one of the detected parameter of the deformation amount or the parameter of the force value of the micro force sensor.

[0037] In some embodiments, a state indication part is further included, configured to give an identifiable state prompt according to the state of the accessory or the workpiece.

[0038] In some embodiments, the controller is configured to: determine the state of the accessory or the workpiece according to at least one of the detected parameter of the deformation amount or the parameter of the force value of the micro force sensor, and control the operation of the motor according to the state of the accessory or the workpiece.

[0039] In some embodiments, the controller is configured to: when it is determined that the accessory and the workpiece are in a preset relationship according to at least one of the detected parameter of the deformation amount or the parameter of the force value of the micro force sensor, the controller controls the motor to execute a preset operating state.

[0040] In some embodiments, the power tool includes a table-type cutting tool, comprising: a workbench for supporting a workpiece; an accessory including a saw blade for cutting the workpiece; at least one micro force sensor disposed on the workbench; and a controller configured to: determine that the saw blade is disengaged or substantially disengaged from the workpiece based on at least one of the detected deformation parameter or force value parameter of the micro force sensor, and when determined, the controller controls the motor to stop.

[0041] In some embodiments, the power tool includes a cutting tool, comprising: an accessory including a saw blade for cutting the workpiece; a receiving portion for receiving and clamping the accessory; a status indicating portion; at least one micro force sensor disposed within the receiving portion and configured to detect at least one of the deformation parameter of the contact portion between the accessory and the receiving portion or the applied force value parameter; and a controller configured to: determine the positional relationship between the saw blade and the receiving portion based on at least one of the detected deformation parameter or force value parameter of the micro force sensor, and the controller controls the status indicating portion to give an identifiable status prompt.

[0042] In some embodiments, the power tool includes a cutting tool, comprising: an accessory including a saw blade for cutting the workpiece; a receiving portion for receiving and clamping the accessory; at least one micro force sensor disposed within the receiving portion and configured to detect at least one of the deformation parameter of the contact portion between the accessory and the receiving portion or the applied force value parameter; and a controller configured to: determine the working state of the saw blade based on at least one of the detected deformation parameter or force value parameter of the micro force sensor, and the controller issues a corresponding control signal according to the working state of the saw blade.

[0043] In some embodiments, the controller is configured to: determine that the saw blade is disengaged from the workpiece or not in contact with the non-workpiece based on at least one of the detected deformation parameter or force value parameter of the micro force sensor, and when determined, the controller restricts the output of the motor.

[0044] A lighting device, comprising: a lighting mechanism including a lamp head for emitting light; the lamp head includes a lamp head housing and a lamp board, wherein the lamp board is received in the lamp head housing; an adjusting mechanism for obtaining user input; a controller connected to the adjusting mechanism; at least one micro force sensor configured to detect at least one of the deformation parameter or the applied force value parameter of at least one preset part of the adjusting mechanism; the controller is connected to the at least one micro force sensor, and the controller is configured to: determine the target working state of the lighting mechanism based on at least one of the detected deformation parameter or force value parameter of the micro force sensor.

[0045] In some embodiments, the working state includes turning on the lighting mechanism, turning off the lighting mechanism, and changing the output form of the lighting light of the lighting mechanism.

[0046] The beneficial effects of the present application are as follows: The micro-force sensor outputs the torque generated by the output part through the program of the controller by detecting at least one of the parameters of the deformation amount or the force value, and accurately obtains the output torque of the output part, which better protects the product use safety and component safety and extends the service life of the product. Description of the Drawings

[0047] Figure 1 is an example diagram of the power tool system and the micro-force sensor in the present application; Figure 2 is a schematic structural diagram of the power tool polisher in the present application; Figure 3 is a schematic structural diagram of the power tool using an in-built battery in the present application; Figure 4 is a schematic structural diagram of the power tool outdoor walking device in the present application; Figure 5 is a schematic structural diagram of a battery pack in the present application; Figure 6 is a schematic structural diagram of the battery cell module of a battery pack in the present application; Figure 7 is an example diagram of the charging combination system and the micro-force sensor; Figure 8 is a schematic structural diagram of the charger in the present application; Figure 9 is a schematic structural diagram of the micro-force sensor; Figure 10 is a schematic structural diagram of the micro-force sensor installed in the battery pack housing; Figure 11 is a schematic structural diagram of the micro-force sensor installed in the touch screen; Figure 12 is a schematic structural diagram of the control panel in the present application; Figure 13 is a schematic diagram of the exploded view of the control panel; Figure 14 is a schematic diagram of the control panel with three micro-force sensors set therein; Figure 15 is a schematic diagram of the control panel with four micro-force sensors set therein; Figure 16 is a schematic diagram of the speed regulation mechanism and the micro-force sensor in the present application; Figure 17 is a schematic diagram of the adjusting mechanism of the lighting device in the present application; Figure 18 is a schematic structural diagram of the hand-held power tool being a circular saw in the present application; Figure 19 It is a schematic structural diagram of another perspective when the hand-held power tool in this application is a circular saw; Figure 20 It is a block diagram of the electrical structure of the hand-held power tool in this application; Figure 21 It is a flowchart of the control method of the hand-held power tool in this application; Figure 22 It is a schematic structural diagram of the hand-held power tool in this application when it is a drill; Figure 23 It is a schematic cross-sectional view of the hand-held power tool in this application when it is a drill; Figure 24 It is a schematic cross-sectional structural view of the hand-held power tool in this application when it is a drill; Figure 25 It is a schematic cross-sectional view of another perspective of the hand-held power tool in this application when it is a drill; Figure 26 It is a schematic structural diagram of the micro force sensor installed in the power tool in this application; Figure 27 It is a block diagram of the electrical structure of the hand-held power tool in this application; Figure 28 It is a flowchart of the control method of the hand-held power tool in this application; Figure 29a - 29c It is a schematic structural diagram of the trigger of the power tool in this application; Figure 30 It is a schematic structural diagram of the power tool in this application when it is a table saw; Figure 31a - 31c It is a schematic structural diagram of the power tool in this application when it is a table saw; Figure 32 It is a flowchart of the control method of the power tool in this application; Figure 33 It is a block diagram of the electrical structure of the power tool in this application; Figure 34 It is a schematic structural diagram of the power tool in this application when it is a jigsaw; Figure 35 It is Figure 34 a partial cross-sectional view; Figure 36 It is a partial cross-sectional view of the power tool in this application when it is a reciprocating saw; Figure 37 It is a schematic structural diagram of the power tool in this application when it is a fastener driver; Figure 38 It is a schematic structural diagram of the power tool in this application when it is an outdoor walking device, mainly showing the walking components and the control circuit board; Figure 39This is a schematic structural diagram of the power tool as another outdoor walking device in this application; Figure 40 is Figure 39 a schematic structural diagram of the steering wheel in Figure 41 is Figure 4 a schematic structural diagram of the first operating lever and the second operating lever in Figure 42 This is a schematic structural diagram of the power tool as an outdoor walking device in this application, mainly showing the frame structure. Detailed implementation manners

[0048] Before explaining any implementation manner of this application in detail, it should be understood that this application is not limited to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0049] In this application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the presence of additional identical elements in the process, method, article or device including that element.

[0050] In this application, the term "and / or" is a relationship description of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in this application, the character " / " generally represents an "and / or" relationship between the associated objects before and after.

[0051] In this application, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, by way of example, direct connection means that two parts or components are connected together without the need to provide an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0052] In this application, those of ordinary skill in the art will understand that relative terms used in connection with quantities or conditions (such as "about", "approximately", "substantially", etc.) are intended to include the recited value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances resulting from manufacturing, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose ranges defined by the absolute values of two endpoints. Relative terms may refer to plus or minus a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. Numerical values without the use of relative terms should also be disclosed as specific values with tolerances. In addition, when expressing relative angular positional relationships (such as substantially parallel, substantially perpendicular), "substantially" may refer to plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0053] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0054] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that orientation terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side may include directly below, lower left, lower right, lower front, and lower rear, etc.

[0055] For the sake of clearly illustrating the technical solutions of this application, the upper side, lower side, front side, and rear side as shown in Figure 1 are also defined.

[0056] As shown in Figures 1 - 6As shown, an electric tool system 1 of an embodiment of the present application is provided. Among them, the electric tool system 1 includes an electric tool 10. In this embodiment, the electric tool 10 is a polishing machine 100a. In some embodiments, the electric tool 10 can also be other handheld electric tools, such as a screwdriver, a wrench, a hammer drill, a nail gun, a sander, a reciprocating saw, a jigsaw, etc. In some embodiments, the electric tool 10 can also be a table-type tool, such as a table saw, a metal cutting machine, a router, a miter saw, etc. In some embodiments, the electric tool 10 is a handheld garden tool, such as a pruning machine, a blower, etc. In some embodiments, the electric tool 10 is a push-type garden tool such as a lawn mower, a snow blower, a cleaning machine. In some embodiments, the electric tool 10 is a fan, etc.

[0057] In some embodiments, as Figure 4 shown, the electric tool 10 is an outdoor walking device 400. The outdoor walking device 400 includes a vehicle frame 41 and a walking assembly 42. Among them, the vehicle frame 41 is the main structure of the outdoor walking device 400. The walking assembly 42 supports the vehicle frame 41. The walking assembly 42 includes wheels 422, 421. The walking assembly 42 includes a drive motor. The outdoor walking device 400 includes, for example, a riding lawn mower that can walk outdoors and mow grass. It can be understood that the outdoor walking device 400 can also be other vehicles that only walk outdoors, such as a multi-purpose vehicle, and can also be a beach vehicle, a utility vehicle (UTV), a golf cart, an all-terrain vehicle (ATV). The outdoor walking device 400 can also be a vehicle that can achieve another function in addition to the walking function, such as a snow blower, which can not only walk outdoors but also achieve the function of snow blowing. It can also be an agricultural machinery vehicle, such as a harvester, a spraying vehicle, etc. Of course, it can be understood that for the outdoor walking device 400, it can also be a cleaning machine.

[0058] In some embodiments, the electric tool 10 further includes a non-motor-driven electrical device 200, such as a work light, a photoelectric detection device, a radio, and a speaker, etc. The non-motor-driven electrical device 200 generally does not have a motor and directly uses electric energy to drive the working part 21. It can be understood that the working part 21 is, for example, a light-emitting element, a sound-emitting element, etc.

[0059] As Figure 1 and Figures 5 to 6The power tool system 1 further includes a power supply 300 for providing electrical energy to the power tool 10. In the present embodiment, the power tool 10 is powered by a DC power supply, for example, the DC power supply is a battery pack, and the battery pack cooperates with a corresponding power supply circuit to power the corresponding components in the power tool 10. For a power tool 10 having a motor, the power supply 300 at least powers the motor. Those skilled in the art should understand that the power supply 300 is not limited to the scenario of using a battery pack, and can also be powered by AC power, AC power, and corresponding rectification, filtering and voltage regulation circuits to achieve power supply to the corresponding components in the machine. In the present embodiment, the DC power supply is specifically configured as a battery pack, and the battery pack 300 will be used to replace the DC power supply hereinafter, but it cannot be used as a limitation to the present application.

[0060] In this embodiment, a battery pack 300a is taken as an example, which includes a battery pack housing 31 and a battery cell module 32. The battery pack housing 31 is configured to be coupled with the power tool 10, and the battery cell module 32 is disposed in the battery pack housing 31. The battery pack 300 also includes a terminal assembly 33, which is electrically connected to the battery cell module 32. The battery cell module 32 includes a battery cell 321.

[0061] In this embodiment, if Figure 2 As shown, the polishing machine 100a is provided with a power connection part 15b, and the power connection part 15b is used for detachably connecting the battery pack 300b. The power connection part 15b is provided with at least a power interface, which is electrically connected to the terminal assembly 33 of the battery pack 300b to power the power tool 10. In this embodiment, the power connection part 15b is used for detachably connecting the battery pack 300b, that is, the battery pack 300b is pluggable and connected to the power connection part 15b. The power connection part 15b is also provided with a locking structure and a pop-up structure. The locking structure is used to lock the battery pack 300b in the power connection part 15b to prevent the battery pack 300b from shaking, and ensure the electrical connection between the battery pack 300b and the power interface. The pop-up structure is used to pop out the battery pack 300b when the locking structure releases the lock on the battery pack 300b, so as to facilitate the user to disassemble the battery pack 300b. Because the working principle and structure of the mechanical battery pack 300b locking and ejecting have been fully disclosed to professionals in the field, a detailed description is omitted here for the purpose of brevity. Among them, the battery pack 300a and the battery pack 300b are battery packs 300 with different nominal voltages. Due to the different nominal voltages, the battery packs 300a and 300b have different volumes, but this does not affect the actual content of the connection.

[0062] In some alternative embodiments, the power tool is provided with a power connection part 15c, and the battery pack is an in-built battery 300c. That is to say, the power connection part 15c is non-removably connected to the in-built battery 300c. The power connection part 15c is configured with a receiving part, and the in-built battery 300c is non-removably received in the receiving part. It can be understood that the in-built battery 300c can be understood as a battery that is generally not removed, or a battery that is inconvenient for the user to quickly remove.

[0063] In some embodiments, for the outdoor walking device 400, the power supply 300 is used to supply power to at least the walking assembly 42, and the power supply 300 is installed on the vehicle frame 41. The walking assembly 42 includes a walking motor and wheels 421. Among them, the walking motor drives the wheels 421 to rotate so that the outdoor device moves according to the instructions. In some embodiments, when the outdoor walking device 400 also incorporates other functions, such as mowing, snow clearing, and harvesting, the outdoor walking device 400 is also provided with a working motor, and the power supply 300 also supplies power to the working motor.

[0064] In some embodiments, the power tool 10 includes a working part 21 that completes sound and / or light functions, and the power supply 300 supplies power to the working part 21. As Figure 1 and Figure 17 shown, the power tool 10 is a non-motor-driven electrical device 200, such as a work light, a photoelectric detection device, a radio, and a speaker, etc., and the battery pack 300a supplies power to the working part 21. In some embodiments, as Figure 4 shown, the power tool 10 includes a motor, and the working part 21 is used as an auxiliary component of the power tool 10, such as a supplementary lighting of the power tool, a laser scale of the power tool, or an alarm mechanism of the power tool, etc. The battery pack 300 supplies power to both the motor and the working part 21.

[0065] As Figure 7 shown, a charging combination system 5 of an embodiment of the present application is provided. The charging combination system 5 includes battery packs 300a, 300b and charging devices 500a, 500b, 500c, 500d. Among them, the battery packs 300a, 300b are coupled to the power tool 10 and supply power to the power tool 10. The charging devices 500a, 500b, 500c, 500d are coupled to the battery packs 300a, 300b or the power tool 10 and are used to charge the battery packs 300a, 300b. In some embodiments, as Figure 8As shown, taking the charging device 500b as an example, a charging device is a charger 500b. The charger 500b includes: a charging housing 51, a battery pack interface 52, and a circuit board assembly 53. Among them, the battery pack interface 52 is provided on the charging housing 51. The battery pack interface 52 is used to couple with the battery pack 300. The circuit board assembly 53 is at least partially disposed in the charging housing 51. In this embodiment, the charger 500b further includes a power access portion 54, and the power access portion 54 is used to access an external power source. In this embodiment, the power source can be selected as an AC power source, and the power access portion 54 can access 120V or 220V AC mains. The power access portion 54 is connected with a power conversion circuit to convert the accessed alternating current into charging electric energy suitable for charging the battery pack and auxiliary electric energy for supplying power to the internal components of the charger 500b. It can be understood that the power conversion circuit can at least include an AC / DC module. In an alternative implementation, the power access portion 54 can access a photovoltaic panel, and the power conversion circuit can convert light energy into charging electric energy suitable for charging the battery pack and auxiliary electric energy for supplying power to the internal components of the charger 500b. It can be understood that the power conversion circuit can include an MPPT (Maximum Power Point Tracking, solar controller) module, that is, a module that converts light energy into electric energy. In this embodiment, the charging housing 51 is connected with a power cord plug as the power access portion 54. In an alternative implementation, the power access portion 54 can also be other forms of interfaces, which are not limited herein.

[0066] In some embodiments, the charging housing 51 is connected with a cable and / or a connector, and the connector is connected to the battery pack to charge the battery pack. In some embodiments, the battery pack 300 is coupled to the power connection portion of the power tool 10, and the charging device is coupled to the power tool 10 to charge the battery pack 300 through the power tool 10. For example, the charging station 500d of a smart lawn mower or a smart lawn mowing robot, the charging base of a vacuum cleaner or a blower / sucker. Of course, it also includes a conventional charger with a USB connector.

[0067] An electrical device according to an embodiment of the present application is provided. The electrical device includes: a housing and a battery pack interface. The battery pack interface is provided on the housing and is used to couple with the battery pack 300 to charge the battery pack 300 or be powered by the battery pack 300. The battery pack 300 is used to supply power to the power tool 10. Among them, the electrical device includes a power tool 10, and the power tool 10 includes an outdoor walking device 400, a power tool 10 driven by a motor, or a non-motor-driven electrical device 200. In some embodiments, the electrical device includes a charging device 500, and the charging device 500 includes a power access portion 54 for accessing an external power source. The charging device 500 further includes an output portion, that is, the battery pack interface 52, and the output portion is coupled to the battery pack 300 or the power tool 10 for charging the battery pack 300.

[0068] Regarding the battery pack 300, the nominal voltage of the battery pack 300 is greater than or equal to 3V and less than or equal to 18V. In some embodiments, the nominal voltage of the battery pack 300 is greater than or equal to 18V and less than or equal to 56V. In some embodiments, the nominal voltage of the battery pack 300 is greater than or equal to 56V and less than or equal to 120V. Herein, the nominal voltage generally refers to the voltage specified by the manufacturer or seller on the labels, packages, user manuals, specifications, advertisements, marketing, or other supporting documents of these products, so that users can understand which power tools 10 and battery packs can operate with each other. Alternatively, the nominal voltage of the battery pack 300 can also be obtained by detection or calculation. The nominal voltage can be the voltage of the battery pack when the state of charge (SOC) of its battery is fifty percent (50%).

[0069] Optionally, the nominal voltage of each battery cell 321 is greater than or equal to 3V. In some embodiments, the nominal voltage of the battery cell 321 is greater than or equal to 3.6V. The nominal capacity of each battery cell 321 is greater than or equal to 1.5 ampere-hours (Ah). In some embodiments, the nominal capacity of each battery cell 321 is greater than or equal to 3 ampere-hours (Ah). In some embodiments, the total capacity of the battery pack 300 is greater than or equal to 1.5Ah and less than or equal to 5Ah. Taking the battery pack 300 with a nominal voltage of 56V as an example, two sets of multi-cell single-cell lithium battery cells 321 with a nominal voltage of 4V and a capacity of nearly 2Ah are arranged in parallel in the battery pack 300. The average discharge current of the battery cell 321 is 6A, and each group is composed of 14 battery cells 321 connected in series. Such an arrangement enables the battery pack 300 to have a nominal voltage of 56V and a battery capacity of nearly 4Ah.

[0070] Optionally, the battery pack 300 can be a lithium battery pack, a solid-state battery pack, or a soft-pack battery pack.

[0071] In this embodiment, the power tool system 1 further includes at least one micro force sensor 600. The micro force sensor 600 is a microelectromechanical ("MEMS") force sensor. This sensor device is used to measure the force applied to at least a part of it. Herein, the micro force sensor 600 is installed in the power tool 10 device or the battery pack 300. It can be understood that in some embodiments, the micro force sensor 600 is installed in the power tool 10. In some embodiments, the micro force sensor 600 is installed in the battery pack 300. In some embodiments, the micro force sensor 600 is installed in both the battery pack 300 and the power tool 10. According to different actual test accuracy requirements and measurement area range requirements, the installation quantity and installation position of the micro force sensor 600 are also different, which will be detailedly disclosed hereinafter.

[0072] At least one of the power tool 10 and the battery pack 300 is provided with a force-receiving member, and the micro force sensor 600 is used to measure the deformation amount or force value of the force-receiving member. It can be understood that substances generate deformation due to force. Therefore, the micro force sensor 600 can directly measure the force value or convert it into a force value according to the deformation amount generated by the force-receiving member due to force. The micro force sensor 600 measures the deformation amount or force value of the force-receiving member and converts it into a related electrical signal for output. In this embodiment, the operating current of the micro force sensor 600 is less than or equal to 10 mA. In some embodiments, the operating current of the micro force sensor 600 is less than or equal to 5 mA. In some embodiments, the operating current of the micro force sensor 600 is less than or equal to 1 mA. In some embodiments, the operating current of the micro force sensor 600 is less than or equal to 900 µA. In some embodiments, the operating current of the micro force sensor 600 is less than or equal to 500 µA. In some embodiments, the operating current of the micro force sensor 600 is less than or equal to 100 µA. In some embodiments, the operating current of the micro force sensor 600 is less than or equal to 50 µA. In some embodiments, the operating current of the micro force sensor 600 is less than or equal to 10 µA.

[0073] The size of the micro force sensor 600 is less than or equal to 3 mm. In this embodiment, for the power tool system 1 powered by the battery pack 300, the micro force sensor 600 is disposed in either the power tool 10 or the battery pack 300 to obtain a pressure value to complete a corresponding action. In some embodiments, for a scenario where a power supply is connected by a cable, such as mains power or alternating current, the micro force sensor 600 is disposed in the power tool 10. It should be explained that the micro force sensor 600 includes three dimensions: length L, width W, and thickness H, where the largest dimension is less than or equal to 3 mm. In some embodiments, the micro force sensor 600 is in the shape of a thin plate, the length L dimension is greater than or equal to the width W dimension, and the thickness dimension H is the smallest, where the length L dimension of the micro force sensor 600 is less than or equal to 3 mm. In some embodiments, the length L dimension of the micro force sensor 600 is less than or equal to 2.0 mm. In some embodiments, the length L dimension of the micro force sensor 600 is less than or equal to 1.5 mm. In this embodiment, the area of the micro force sensor 600 is less than or equal to 4 mm 2 . In some embodiments, the area of the micro force sensor 600 is less than or equal to 3 mm 2 . In some embodiments, the area of the micro force sensor 600 is less than or equal to 2 mm 2 . The micro force sensor 600, a pressure sensor with small size and low power consumption, can improve the power utilization efficiency of the power tool system 1 and extend the battery life. It realizes the miniaturization and compactness of the product.

[0074] Such as Figure 9As shown, the structure of the micro force sensor 600 includes a substrate portion 61 and a cover portion 62. The substrate portion 61 includes a boss and a bending portion 64. A sealed cavity 63 is formed on the inner surface between the substrate portion 61 and the cover portion 62. When the cover portion 62 and the substrate portion 61 are combined together, the sealed cavity 63 can be sealed between the cover portion 62 and the substrate portion 61. Optionally, the sealed cavity 63 is formed by etching a channel from the substrate portion 61 and then sealing the volume between the combined substrate portion 61 and the cover portion 62. Optionally, when the substrate portion 61 adheres to the cover portion 62, this volume is sealed between the substrate portion 61 and the cover portion 62, which results in the formation of the sealed cavity 63. The channel can be etched by removing material from the substrate portion 61. Additionally, the channel defines an outer wall and at least one bending portion 64. The channel is continuous and has a substantially square shape. Optionally, the channel can form multiple outer walls and / or multiple bending portions 64. In other words, the micro force sensor 600 has a sealed cavity 63 that defines a volume completely enclosed by the cover portion 62 and the substrate portion 61. The sealed cavity 63 is sealed from the external environment.

[0075] The micro force sensor 600 includes at least one sensing element 65 disposed on the bottom surface of the base. The sensing element 65 can change its electrical characteristics (e.g., resistance, capacitance, charge, etc.) in response to the deflection of at least one bending portion 64. The change in the electrical characteristics can be measured as the analog electrical signal described herein. In one embodiment, the sensing element 65 can optionally be a piezoresistive transducer. When the piezoresistive transducer is compressed and stretched due to an applied external force F, its resistivity changes in the opposite way. Therefore, a Wheatstone bridge circuit including multiple (e.g., four) piezoresistive transducers (e.g., two in each orientation with respect to strain) becomes unbalanced, and a differential voltage (sometimes also referred to as an "analog electrical signal" herein) is generated at the positive signal terminal and the negative signal terminal. This differential voltage is proportional to the applied external force F of the micro force sensor 600. Optionally, the external force F directly applied to the micro force sensor 600 is less than or equal to 20 N. The sampling frequency of the micro force sensor 600 is greater than or equal to 500 Hz. In some embodiments, the sampling frequency of the micro force sensor 600 is greater than or equal to 600 Hz, 700 Hz, 800 Hz, 900 Hz, 1000 Hz.

[0076] In some embodiments, the cover portion 62 can optionally be made of glass (e.g., borosilicate glass) or silicon. The substrate portion 61 is optionally made of silicon. Optionally, the substrate portion 61 (and its components, e.g., such as the boss, outer wall, bending portion 64, etc.) is a single-piece continuous material, i.e., the substrate portion 61 is integral. The cover portion 62 and / or the substrate portion 61 can also use techniques known in the art, including but not limited to silicon fusion bonding, anodic bonding, glass sintering, thermocompression, and eutectic bonding or bonding the cover and the substrate portion 61.

[0077] The substrate part 61 includes a silicon-based circuit board. In this embodiment, for example, a direct plating copper (DPC) ceramic-based circuit board. Aluminum nitride / aluminum oxide ceramic is used as the substrate of the circuit. A metal layer is compounded on the surface of the substrate by a sputtering process, and a circuit is formed by electroplating and photolithography processes. Since the DPC ceramic-based circuit board has a stable coefficient of thermal expansion, excellent mechanical properties and electrical properties, the stability and accuracy of the sensor in high or low temperature environments can be ensured. It can withstand high pressure and strong vibration, avoiding the failure of the sensor due to mechanical stress. It has a low dielectric constant and low dielectric loss, which can reduce signal noise and distortion, improving the accuracy and stability of the sensor. Moreover, the DPC process has a strong bonding force between the metal copper wires, providing higher reliability. Since the DPC process can ensure a firm bond between the metal copper wires and the ceramic substrate, preventing problems such as loosening and breakage. In addition, the DPC process can also improve the temperature resistance and seismic resistance of the product to ensure reliability in harsh working environments.

[0078] In some embodiments, the charging combination system 5 includes at least one micro force sensor 600. The micro force sensor 600 is a microelectromechanical (MEMS) force sensor. The sensor device is used to measure the force applied to at least a part of it. Among them, the micro force sensor 600 is installed in the charging device 500. For example, in the charger 500b or the charging station 500d. The charging device 500 includes a housing provided with an accommodation space; the micro force sensor 600 is installed inside the housing. According to different actual test accuracy requirements and measurement area range requirements, the installation quantity and installation position of the micro force sensor 600 are also different, which will be detailedly disclosed below.

[0079] The charging device 500 is provided with a force-receiving component. The micro force sensor 600 is used to measure the deformation amount or force value of the force-receiving component. The micro force sensor 600 measures the deformation amount or force value of the force-receiving component and converts it into a relevant electrical signal for output. In this embodiment, the working current of the micro force sensor 600 is less than or equal to 10 mA. In some embodiments, the working current of the micro force sensor 600 is less than or equal to 5 mA. In some embodiments, the working current of the micro force sensor 600 is less than or equal to 1 mA. In some embodiments, the working current of the micro force sensor 600 is less than or equal to 900 µA. In some embodiments, the working current of the micro force sensor 600 is less than or equal to 500 µA. In some embodiments, the working current of the micro force sensor 600 is less than or equal to 100 µA. In some embodiments, the working current of the micro force sensor 600 is less than or equal to 50 µA. In some embodiments, the working current of the micro force sensor 600 is less than or equal to 10 µA.

[0080] The size of the micro force sensor 600 is less than or equal to 3 mm. It should be noted that the micro force sensor 600 includes three dimensions: length, width, and thickness. Among them, the largest dimension is less than or equal to 3 mm. In some embodiments, the micro force sensor 600 is in the shape of a thin plate, the length dimension is greater than or equal to the width dimension, and the thickness dimension is the smallest. Among them, the length dimension of the micro force sensor 600 is less than or equal to 3 mm. In some embodiments, the size of the micro force sensor 600 is less than or equal to 2.0 mm. In some embodiments, the size of the micro force sensor 600 is less than or equal to 1.5 mm. In this embodiment, the area of the micro force sensor 600 is less than or equal to 4 mm 2 . In some embodiments, the area of the micro force sensor 600 is less than or equal to 3 mm 2 . In some embodiments, the area of the micro force sensor 600 is less than or equal to 2 mm 2 . The micro force sensor 600, a pressure sensor with small size and low power consumption, can improve the power utilization efficiency of the power tool system 1 and extend the battery life. It realizes the miniaturization and compactness of the product.

[0081] The structure of the micro force sensor 600 is basically the same as that of the micro force sensor 600 set in the power tool system 1 in the above text. For the sake of simplicity of the specification, it will not be elaborated here.

[0082] As an embodiment of the present application, the force-receiving component is formed or connected to the shell of the power tool 10, the battery pack 300a, or the charging device. The force-receiving component includes a force-receiving surface 71, which is used to receive an external force and generate different deformation parameter values when the external force changes.

[0083] As a specific implementation manner of this embodiment, for the convenience of introduction, taking the battery pack 300a as an example, the force-receiving component 70a is arranged on the human-machine interaction device 38 of the battery pack 300a. Among them, the human-machine interaction device 38 is for the user to operate the battery pack 300a, feedback the working state of the battery pack 300a, display the information of the battery pack 300a, etc. It should be noted that the deformation parameter values include the values directly generated by the deformation of the force-receiving surface, such as height change, curvature change, and other similar direct numerical changes. The deformation parameter values also include the numerical parameters obtained by performing relevant calculations based on the values directly generated by the deformation. For example, the area or volume change caused by the height change, or the parameter values obtained after one or two calculations of the numerical values.

[0084] In the related art, the human-machine interaction device 38 is generally a push-button switch, which is used to start or stop the discharge of the battery pack 300a, or some adjustment operations of the battery pack 300a. The push-button switch uses a separate push-button switch such as a micro switch, and the switch state is switched by the user pressing a certain stroke, and then different signals are generated. At least a part of such a separate push-button switch needs to be arranged on the visible surface of the battery pack housing 31 to receive the user's operation to perform corresponding actions or send corresponding signals. It can be understood that, for example, a micro switch requires a certain trigger range, such as 1.5 mm or even larger. On the one hand, it is very difficult to directly cause a local deformation amount of more than 1.5 mm on the battery pack housing 31, so the trigger position of the switch needs to be set on the visible surface for the user to directly operate. On the other hand, due to such a trigger range, when the switch is triggered to the maximum range, a gap will be generated between the switch position and the housing. Moreover, when installing and mating such a switch, installation holes need to be formed in the battery pack housing 31, and it is inevitable that a gap or sealing defect will be generated between the switch and the battery pack housing 31 during the installation of the switch.

[0085] In this embodiment, the micro force sensor 600 is used to replace the micro switch in the related art. The human-machine interaction device 38 includes a force-receiving member and the micro force sensor 600. The force-receiving member is used to receive the user's operation. Optionally, the human-machine interaction device 38 includes a force-receiving surface 71 and the micro force sensor 600, and the force-receiving surface 71 is an area defined on the battery pack housing 31 with a certain area. The force-receiving surface 71 is used to receive an external force, where the external force includes the user's active touch force, including touch, tapping, pressing, etc. As Figure 5As shown, the micro-force sensor 600 is disposed within the battery pack housing 31. Optionally, the micro-force sensor 600 is disposed on the back surface of the force-receiving surface 71. That is to say, the outer side surface of the battery pack housing 31 is set as the force-receiving surface 71, and the micro-force sensor 600 is disposed on the inner side surface corresponding to the force-receiving surface 71. In other alternative embodiments, the micro-force sensor 600 may be disposed on the back surface or side surface of the force-receiving surface 71 or on the outer periphery of the force-receiving surface. That is to say, the outer side surface of the battery pack housing 31 is set as the force-receiving surface 71, and the micro-force sensor 600 is disposed on the circumferential side surface of the battery pack housing 31 where the force-receiving surface 71 is located, or on the side wall of another housing that has deformation transmission with the battery pack housing 31 where the force-receiving surface 71 is located. In other alternative embodiments, the micro-force sensor 600 may be disposed on the outer periphery of the force-receiving surface 71. That is to say, the outer side surface of the battery pack housing 31 is set as the force-receiving surface 71, and the micro-force sensor 600 may also be disposed on the outer side surface of the battery pack housing 31 at the outer edge of the force-receiving surface 71 or on the housing surface that has deformation transmission with the battery pack housing 31 where the outer edge of the force-receiving surface 71 is located. Among them, in order to stably fix the micro-force sensor 600, the battery pack housing 31 is provided with a flanging or covering structure that at least partially covers the outer edge of the force-receiving surface 71, and the micro-force sensor 600 is fixed between the force-receiving surface 71 and the flanging or covering structure. Therefore, the micro-force sensor 600 is also disposed inside the battery pack housing 31. It should be noted that in some cases, due to the need for the appearance or other structures of the battery pack 300a, an additional housing is used to fix the micro-force sensor 600. At this time, the accessory housing also belongs to the battery pack housing 31. It can be understood that the housing integrally formed with or directly or indirectly connected to the battery pack housing 31 belongs to the scope of the battery pack housing 31. Therefore, only when the micro-force sensor 600 is completely exposed on the visible surface of the battery pack housing 31 does it not belong to the content of the "inside of the battery pack housing 31" disclosed in this application.

[0086] Taking the micro-force sensor 600 disposed on the back surface of the force-receiving surface 71 as an example, the micro-force sensor 600 is directly or indirectly connected to the back surface of the force-receiving surface 71. In some embodiments, the micro-force sensor 600 is disposed on the back surface of the force-receiving surface 71 but does not contact the back surface of the force-receiving surface 71. That is to say, the micro-force sensor 600 is suspended on the back surface of the force-receiving surface 71. For example, the micro-force sensor 600 is disposed on the back surface of the force-receiving surface 71 but is connected and fixed to the front surface or side surface of the force-receiving surface 71 through a connecting member or a fastening member. The force-receiving surface 71 is configured as the area defined by the battery pack housing 31 to ensure that the battery pack housing 31 is an integral structure.

[0087] In this embodiment, a microelectromechanical ("MEMS") force sensor is used. Utilizing its sensitive and radio-frequency interference-free detection characteristics, the MEMS force sensor can directly sense the micro-deformation on the battery pack housing 31, and thus generate corresponding signals. In this embodiment, the MEMS force sensor provides a force detection range within 5g to 10kg. The MEMS force sensor can detect the touch force applied by the user on the battery pack housing 31, so that the battery pack housing 31 does not need to have holes and maintains an integrally formed housing structure. In this embodiment, the waterproof performance of the battery pack 300a is at least IPX6, and it has a fully adjustable and multi-level driven user interface as required. In this embodiment, the detection range of the micro force sensor 600 for the deformation amount of the force-receiving surface 71 is greater than or equal to 10 microns and less than or equal to 20 microns. In some embodiments, the detection range of the micro force sensor 600 for the deformation amount of the force-receiving surface 71 is greater than or equal to 10 microns and less than or equal to 50 microns. In this embodiment, the detection range of the micro force sensor 600 for the deformation amount of the force-receiving surface 71 is greater than or equal to 10 microns and less than or equal to 70 microns. In this embodiment, the detection range of the micro force sensor 600 for the deformation amount of the force-receiving surface 71 is greater than or equal to 10 microns and less than or equal to 90 microns. In this embodiment, the micro force sensor 600 can detect a press detection signal with a signal-to-noise ratio greater than or equal to 18db for the pressure sensitivity of the force-receiving surface 71.

[0088] In some embodiments, the proportion of the force-receiving surface 71 on the side surface of the outer shell of the battery pack 300a where it is located is greater than or equal to 1% and less than or equal to 50%. In some embodiments, the proportion is greater than or equal to 1% and less than or equal to 40%. In some embodiments, the proportion is greater than or equal to 1% and less than or equal to 30%. In some embodiments, the proportion is greater than or equal to 1% and less than or equal to 20%. In some embodiments, the proportion is greater than or equal to 1% and less than or equal to 10%. The force-receiving surface 71 is made of the same material as the battery pack housing 31, such as plastic. There are no special requirements for the material of the force-receiving surface 71 when using the micro force sensor 600.

[0089] Such as Figure 10As shown, when the micro-force sensor 600 is installed, a buffer 72 is provided between the force-receiving surface 71 and the micro-force sensor 600. The touch force of the force-receiving surface 71 is transmitted to the micro-force sensor 600 through the buffer 72. A circuit board 73 is provided between the buffer 72 and the micro-force sensor 600, and the micro-force sensor 600 is bonded to the circuit board 73. Optionally, the buffer 72 includes rubber or silica gel. Optionally, the buffer 72 can be formed of a variety of materials, such as rubber or polymers (e.g., urethane, polyurethane, silicone resin, etc.). The micro-force sensor 600 and the circuit board 73 are bonded using an adhesive, such as PSA, DSA, or other structural adhesives. Optionally, the micro-force sensor 600 is bonded to the circuit board 73 by welding. Optionally, the circuit board 73 includes a printed circuit board 73 (Printed Circuit Board, PCB) and a flexible circuit board 73 (Flexible Printed Circuit, FPC). The thickness of the circuit board 73 is less than or equal to 1 mm. In some embodiments, the thickness of the circuit board 73 is less than or equal to 0.8 mm, 0.7 mm, 0.6 mm, 0.5 mm.

[0090] In this embodiment, a controller is provided on the circuit board 73 and is electrically connected to the micro-force sensor 600. The controller reads the pressure value or deformation amount detected by the micro-force sensor 600. Optionally, the controller uses a dedicated control chip, such as a single-chip microcomputer or a microcontroller unit (MCU). Optionally, the controller is configured such that when the difference between the force value and the reference value is greater than or equal to a first threshold, the controller determines that the force-receiving surface 71 has received a user operation instruction, i.e., an external force from the user, and performs related functions. In some embodiments, a second threshold is also configured, and the controller is configured such that when the change rate of the force value is greater than or equal to the second threshold, the controller determines that the force-receiving surface 71 has received a user operation instruction, i.e., an external force from the user, and performs related functions. Among them, the related functions include starting or stopping the discharge of the battery pack 300a. Optionally, the related functions include some adjustment operations of the battery pack 300a.

[0091] During the judgment process of the controller, the micro-force sensor 600 generates force sensor data at a specified sampling frequency and triggers an interruption when the threshold is exceeded. In this embodiment, the frequency is greater than or equal to 500 Hz. Here, the reference value is relative to the baseline. The micro-force sensor 600 implements a sensor baseline tracking algorithm that updates the baseline at a predetermined frequency, i.e., updates the "zero" baseline value of each sensor, and accordingly updates the interruption threshold and the auto-calibration threshold. When the signal of the pressure value is less than the auto-calibration threshold, the baseline is updated at a pre-specified rate. The controller updates the baseline by comparing the force value with the auto-calibration threshold. When the force value reading exceeds the auto-calibration threshold, the baseline stops updating and a calibration reset timer is enabled. When the calibration reset times out, the baseline is updated according to the baseline weight. The auto-calibration and the interruption level refer to the baseline value; thus, the baseline update automatically changes the aforementioned thresholds. When the number of times the interruption threshold is reached exceeds the number set by the register value, the interruption is triggered. When the force sensor measurement value is higher than the interruption threshold, auto-calibration is not performed. Once the force measurement value is lower than the auto-calibration threshold, the auto-calibration program is re-enabled. This does not happen immediately, but after an additional waiting time set by the register, which is a transient delay for the start of the auto-calibration program.

[0092] In some embodiments, as Figure 5 shown, to provide a better interaction experience between the human-machine interaction device 38 and the user, the human-machine interaction device 38 includes a display unit for being operated or providing feedback information. In some embodiments, the display unit includes a display, such as a display screen or an indicator light. In some embodiments, the display unit includes a touch screen. Optionally, the controller determines that the force-receiving surface 71 receives a user operation instruction, i.e., an external force from the user, and executes related functions, where the related functions include a power display unit. In some embodiments, the force-receiving surface 71 is provided on the touch screen 70b or the display screen. The display unit is woken up or lit up by the operation of the user directly on the display unit and recognized by the micro-force sensor 600. In some embodiments, the force-receiving surface 71 is provided on the battery pack housing 31, and the display unit is woken up or lit up by the operation at a specified position on the battery pack housing 31 and recognized by the micro-force sensor 600. Optionally, the touch screen can be, for example, a liquid crystal display (LCD), a light-emitting diode (LED) display, including an organic light-emitting diode (OLED) display, or an organic electro-luminescent (EL) display. In some embodiments, the human-machine interaction device 38 includes a touchpad, and the touchpad includes a common touchpad and a digitizing tablet.

[0093] As Figure 11As shown, when the force-receiving surface 71 is disposed on the touch screen and the micro force sensor 600 is disposed on the back of the force-receiving surface 71. The touch screen includes a frame 74b, a touch surface 71b, and a main control board 73b. A buffer 72 is disposed between the touch surface 71b and the micro force sensor 600. The touch force of the touch surface 71b is transmitted to the micro force sensor 600 through the buffer 72. The main control board 73b is disposed between the buffer 72 and the micro force sensor 600. The micro force sensor 600 is bonded to the main control board 73b. Optionally, the buffer 72 includes rubber or silica gel. Optionally, the buffer 72 can be formed of a variety of materials, such as rubber or polymers (e.g., urethane, polyurethane, silicone resin, etc.). The micro force sensor 600 and the main control board 73b are bonded using an adhesive, such as PSA, DSA, or other structural adhesives. Optionally, the micro force sensor 600 is bonded to the main control board 73b by welding. In this embodiment, the controller is configured to determine that the force-receiving surface 71 is pressed by a user and activate or light up the electronic touch screen 70b or the touch pad.

[0094] In some embodiments, the force-receiving member is disposed in the human-machine interaction device of the power tool 10. Among them, the human-machine interaction device is for a user to operate the power tool 10, feedback the working state of the power tool 10, display information of the power tool 10, etc. The force-receiving member is formed or connected to the housing. The force-receiving member includes a force-receiving surface, and the force-receiving surface is used to receive an external force and output parameters of different deformation amounts when the external force changes. The force-receiving member includes a force-receiving surface, and the force-receiving surface is used to receive an external force, and the micro force sensor 600 is disposed inside the housing. The micro force sensor 600 is disposed on the back or side of the force-receiving surface 71 or on the outer periphery of the force-receiving surface. Among them, the human-machine interaction device further includes a start control device of the power tool 10. In the related art, the start control device of the power tool 10 uses a trigger switch, and the user starts or shuts down the power tool 10 by triggering the trigger switch. The micro force sensor 600 is disposed inside the housing. The above content taking the battery pack 300 as an example is all applicable to the power tool 10, so it will not be repeated here.

[0095] In some embodiments, the force-receiving component is disposed in the human-machine interaction device of the charging device 500. Among them, the human-machine interaction device is for the user to operate the charging device 500, feedback the working state of the charging device, display the information of the charging device, etc. The charging device 500 includes a housing, and the force-receiving component is disposed on the housing. The micro force sensor 600 is mounted inside the charging housing. The force-receiving component is formed or connected to the housing. The force-receiving component includes a force-receiving surface, and the micro force sensor 600 is connected to the back or side of the force-receiving surface or on the outer periphery of the force-receiving surface. In this embodiment, the water performance of the charging device 500 is at least IPX6, so that the charging stations 500d and portable power stations 500c of the intelligent lawn mower robot have richer usage conditions and adapt to more usage environments. The above content taking the battery pack 300 as an example is all applicable to the charging device 500, so it will not be elaborated here.

[0096] As another embodiment of the present application, through the combined use of multiple micro force sensors 600, the detection of the touch force within a certain area of the plane range is realized. In this embodiment, taking multiple micro force sensors 600 disposed in the control panel as an example, the control panel is used to control the electrical device or the battery pack 300. The control panel 70c is used to control the power tool 10, the battery pack 300 and the charging device 500.

[0097] As Figure 4 shown, taking the outdoor walking device 400 as an example of the power tool 10, the control panel 70c provides a user operation interface to control the outdoor walking device 400. As Figures 12 to 13 shown, the control panel 70c provides a user operation interface for the user to operate and feedback the working state of the outdoor walking device 400.

[0098] In this embodiment, the control panel 70c includes a display 75c, and the display 75c is used for being operated and / or displaying. In some embodiments, the display 75c is used for displaying, that is to say, the display 75c is used to give feedback to the user, namely information prompt. The display 75c can be, for example, a liquid crystal display (LCD), a light-emitting diode (LED) display, including an organic light-emitting diode (OLED) display, or an organic electro-luminescence (EL) display. In some embodiments, it further includes an input part for the user to make settings. Among them, the input part can be a button, a keypad, a rotary / dial button, etc.

[0099] In some embodiments, the display 75c is configured as a touch screen so that the display and the input part are combined into one. In some embodiments, the input part includes a touch pad. Input is performed through the input template, and the display 75c performs display. In this embodiment, the control panel 70c includes a flat force-receiving surface 71c and at least three micro force sensors 600 disposed on the back of the force-receiving surface 71c.

[0100] Among them, the force-bearing surface 71c is the exposed surface of the control panel 70c, that is, the surface that is convenient for users to touch. The force-bearing surface 71c is set as the surface of the outer screen member 751 of the display 75c. It can be understood that the "back surface of the force-bearing surface 71c" is the surface of the outer screen member 751 close to the inside of the control panel 70c. Optionally, the outer screen member 751 is a kind of lens. In some embodiments, the lens is formed of a polymer material. In some embodiments, the lens is formed of polycarbonate. In some embodiments, the lens is formed of glass, such as plexiglass. In some embodiments, the lens is formed of formed plastic. In some embodiments, the force-bearing surface 71c is set as the surface of a protective cover covering the outer screen member 751 of the display 75c. Since the usage conditions of the outdoor walking device 400 are relatively harsh, the risk of direct exposure and loss of the outer screen member 751 of the display 75c is relatively high. Therefore, some outdoor walking devices 400 will cover a layer of tempered glass film on the outside of the outer screen member 751 of the display 75c. In such an embodiment, the "back surface of the force-bearing surface 71c" is still the surface of the outer screen member 751 close to the inside of the control panel 70c. The protective cover and the outer screen member 751 of the display 75c together constitute the exposed surface of the control panel 70c.

[0101] In this embodiment, the diagonal dimension of the control panel 70c is greater than or equal to 2.4 inches and less than or equal to 13 inches. The force-bearing surface 71c is rectangular or substantially rectangular.

[0102] As Figure 14 shown, when the number of micro force sensors 600 is configured to be three, the three micro force sensors 600 are arranged in a triangle, and among them, the distances between the three micro force sensors 600 are determined by their optimal detection ranges. Optionally, to ensure no detection blind area, the detection ranges of the three micro force sensors 600 have overlapping ranges with each other.

[0103] As Figure 15 shown, the micro force sensors 600 are configured at the corners of a rectangle, that is, at the corners of the force-bearing surface 71c. To achieve a detection range that can basically cover the entire force-bearing surface 71c, the number of micro force sensors 600 is greater than or equal to four, and at least one micro force sensor 600 is arranged at each corner of the force-bearing surface 71c. Taking the example of arranging four micro force sensors 600, during installation, two of the micro force sensors 600 are arranged along the first direction, and two micro force sensors 600 are arranged along the second direction, and the distance between each of at least two of the micro force sensors 600 and the corresponding peripheral edge of the force-bearing surface 71c is approximately equal. In some embodiments, the distance between two force sensors is greater than or equal to 2 mm.

[0104] In some embodiments, the number of micro force sensors 600 is greater than four. During installation, an additional number of micro force sensors 600 can be added between two corners.

[0105] Continuing to refer to as Figure 11 and Figure 13 shown, the control panel 70c further includes a main control board 73b for performing related functions according to the output signals of the micro force sensors 600. The main control board 73b also includes a circuit board 73 and a controller. In this embodiment, a buffer 72 is provided between the force-receiving surface 71 and the micro force sensors 600. The touch force of the force-receiving surface 71 is transmitted to the micro force sensors 600 through the buffer 72. The circuit board 73 is disposed between the buffer 72 and the micro force sensors 600. The micro force sensors 600 are bonded to the circuit board 73. Optionally, the buffer 72 includes rubber or silica gel. Optionally, the buffer 72 can be formed of a variety of materials, such as rubber or polymers (e.g., urethane, polyurethane, silicone, etc.). The micro force sensors 600 are bonded to the circuit board 73 using an adhesive, such as PSA, DSA, or other structural adhesives. Optionally, the micro force sensors 600 are bonded to the circuit board 73 by welding.

[0106] In this embodiment, the controller is electrically connected to the micro force sensors 600, and the controller reads the pressure values detected by the micro force sensors 600. Optionally, the controller employs a dedicated control chip, such as a single-chip microcomputer or a microcontroller unit (MCU). The controller is configured to determine that the force-receiving surface 71 is pressed by a user and perform related functions when the difference between the pressure value and the reference value is greater than or equal to a first threshold. In some embodiments, a second threshold is further configured, and the controller is configured to determine that the force-receiving surface 71 is pressed by a user and perform related functions when the change rate of the pressure value is greater than or equal to the second threshold. Among them, the related functions include, but are not limited to, lighting or starting the display 75c, locking or unlocking the display 75c, or switching different modes or menus by tapping or different touches.

[0107] During the judgment process of the controller, the micro-force sensor 600 generates force sensor data at a specified sampling frequency and triggers an interruption when the threshold is exceeded. In this embodiment, the frequency is greater than or equal to 500 Hz. Among them, the reference value is relative to the baseline. The micro-force sensor 600 implements a sensor baseline tracking algorithm that updates the baseline at a predetermined frequency, that is, updates the "zero" baseline value of each sensor, and accordingly updates the interruption threshold and the auto-calibration threshold. When the signal of the pressure value is less than the auto-calibration threshold, the baseline is updated at a pre-specified rate. The controller updates the baseline by comparing the force value with the auto-calibration threshold. When the force value reading exceeds the auto-calibration threshold, the baseline will stop updating and the calibration reset timer will be enabled. When the calibration reset times out, the baseline will be updated according to the baseline weight. The auto-calibration and interruption levels refer to the baseline value; therefore, the baseline update will automatically change the aforementioned thresholds. When the number of times the interruption threshold is reached exceeds the number set by the register value, the interruption is triggered. When the force sensor measurement value is higher than the interruption threshold, auto-calibration will not be performed. Once the force measurement value is lower than the auto-calibration threshold, the auto-calibration program will be re-enabled. This does not happen immediately, but after an additional waiting time set by the register, which is a transient delay for the start of the auto-calibration program.

[0108] Since the micro-force sensor 600 is different from the related capacitive touch sensor, the micro-force sensor 600 does not need to have direct contact with the user. The micro-force sensor 600 can be completely set inside the control panel 70c, and the control panel 70c can maintain an integrally formed housing structure. In this embodiment, the waterproof performance of the control panel 70c is at least IPX6. Compared with mobile electronic devices, for the control panel 70c of electric devices, the user's operations are mainly point touches, with fewer multi-finger operations and drag-and-slide operations. Therefore, the micro-force sensor 600 has a higher adaptability in the field of electric devices. When the micro-force sensor 600 is used in the field of mobile electronic devices, it needs to cooperate with a capacitive touch sensor, which increases the usage cost.

[0109] In some embodiments, the control panel 70c can be used in other power tools 10, such as a handheld power tool 10 with a display 75c or a gardening tool with a display 75c.

[0110] As another embodiment of the present application, by combining the use of multiple micro-force sensors 600, corresponding linear signals can be output through different continuous or intermittent operations. In this embodiment, taking the example of adjusting the rotation speed of the motor 12 of the power tool 10.

[0111] Such as Figure 2 and Figures 16 to 17As shown, the power tool 10 includes: a housing 11, a motor 12, and an output portion 13. Among them, the housing 11 is provided with a receiving space, and at least a part of the motor 12 is disposed in the receiving space. The motor 12 is used to provide power, and the motor 12 rotatably drives the output portion 13. The output portion 13 is used to output power. In this embodiment, the output portion 13 includes an output shaft coupled to the motor 12, and the output shaft rotates around an output axis. To adjust and set the target speed of the motor 12, the power tool 10 further includes an adjustment mechanism 19 and a controller. Among them, in this embodiment, the adjustment mechanism 19 includes a speed adjustment mechanism 19a, and the speed adjustment mechanism 19a is used to obtain user input. The controller is communicatively connected to the speed adjustment mechanism 19a and determines the target speed of the motor 12 according to the output of the speed adjustment mechanism 19a. Among them, the speed adjustment mechanism 19a includes a micro force sensor 600. The user applies different forces to the micro force sensor 600, so that the micro force sensor 600 outputs different signals to the controller, and the controller determines the corresponding target speed of the motor 12 according to the different signals.

[0112] As another embodiment of the present application, as Figure 2 shown, by using a combination of multiple micro force sensors 600, corresponding linear signals are output through different continuous or intermittent operations. In this embodiment, taking the speed adjustment of the motor 12 of the power tool 10 as an example. Compared with the mechanical structure speed adjustment in the related art, using the micro force sensor 600 can maintain the integrity of the housing 11. There is no need to set holes or other hollow structures to install the speed adjustment mechanism 19a, or reserve space due to the measurement range, which affects the sealing performance of the housing 11 of the power tool 10. The power tool 10, such as a polishing machine 100a or other grinding products, has a lot of dust and debris during the working conditions. Maintaining the sealing performance of the housing 11 can prevent dust and debris from entering the machine interior.

[0113] As Figure 17 shown, the speed adjustment mechanism 19a includes an elongated force receiving surface 71a, and the micro force sensor 600 is disposed on the back surface of the force receiving surface 71a. Among them, the force receiving surface 71a is configured as an area defined by the housing 11. In some embodiments, the micro force sensor 600 is directly or indirectly connected to the back surface of the force receiving surface 71a. In some embodiments, the micro force sensor 600 is disposed on the back surface of the force receiving surface 71a but does not contact the back surface of the force receiving surface 71a, that is to say, the micro force sensor 600 is suspended on the back surface of the force receiving surface 71a. For example, the micro force sensor 600 is disposed on the back surface of the force receiving surface 71a but is connected and fixed to the front surface or side surface of the force receiving surface 71a through a connecting member or a fastening member.

[0114] The force-receiving surface 71a is configured as the area defined by the housing 11, ensuring that the housing 11 is of an integral structure. Optionally, the force-receiving surface 71a has the same material and appearance effect as the housing 11. The force-receiving surface 71a is indicated by a long strip marking on the housing 11. For example, the force-receiving surface 71a is indicated by a long strip screen printing on the housing 11, or the force-receiving surface 71a is indicated by a self-adhesive label, or by etching, leather texture or pattern. In some embodiments, the force-receiving surface 71 uses a different material or appearance indication from the housing 11. For example, the force-receiving surface 71a uses a partially transparent or semi-transparent light-transmitting material to enable different operating pressures of the user to be feedback through the light. In some embodiments, the force-receiving surface 71a has different thicknesses or materials to meet the detection requirements of the micro force sensor 600. Optionally, the force-receiving surface 71a is disposed near the gripping portion of the housing 11. Optionally, the force-receiving surface 71a is disposed at the power connection portion of the housing 11. Optionally, the force-receiving surface 71a is disposed at any convenient operating position of the housing 11.

[0115] During installation, the two micro force sensors 600 are respectively disposed on both sides of the midpoint M of the long strip. That is, at the midpoint M in the length direction of the long strip, the two micro force sensors 600 are respectively disposed on both sides of this midpoint M. In this embodiment, when the pressure value applied by the user on the force-receiving surface 71a is transmitted to the micro force sensor 600, it is different due to the different distances from the micro force sensor 600. At the same time, since the micro force sensors 600 are disposed on both sides of the midpoint M of the long strip, therefore, through the program conversion of the system, the output signals of the micro force sensors 600 can be linearly corresponded to the touches at different positions or touches with different forces of the user. In some embodiments, the controller is configured to determine the target speed of the motor 12 according to the ratio of the outputs of the two micro force sensors 600. In some embodiments, the controller is further configured to linearly adjust the actual speed of the motor 12 according to the ratio of the outputs of the two micro force sensors 600. In some embodiments, the stepless adjustment is achieved by the user's sliding on the force-receiving surface 71, such as steplessly adjusting the target speed of the motor 12 and steplessly adjusting the actual speed of the motor 12. Optionally, the controller is configured to perform bidirectional control according to the ratio of the outputs of the two micro force sensors 600, that is, to control the increase and decrease by different sliding methods.

[0116] In some alternative embodiments, the micro-force sensor 600 can also be used to replace the start switch, enabling the user to keep the motor running simply by touching a specific area. The controller is configured to start or stop the motor 12 based on the output of any one of the micro-force sensors 600. For long-term operating conditions, the user can save more effort. On the other hand, eliminating the trigger or other mechanical switches can maintain the sealing of the overall machine housing, improving the waterproof and dustproof performance of the machine, especially for products with high waterproof and dustproof requirements, such as pressure washers, mixers, and underwater products.

[0117] In some alternative embodiments, when the micro-force sensor 600 replaces the start switch, due to the small size of the micro-force sensor 600 and its ability to detect small deformations, it can be used without special treatment of the housing. Therefore, by arranging multiple micro-force sensors 600 at different positions, products with multiple gripping positions can be started and stopped at each position (for example, angle drills, angle grinders, drywall screwdrivers, etc.).

[0118] In some embodiments, the controller is configured to lock or unlock the trigger lock based on the output of any one of the micro-force sensors 600. Or the controller is configured to start or turn off the lighting component in the power tool 10 based on the output of any one of the micro-force sensors 600. Or the controller is configured to start or turn off the adjustment mechanism based on the output of any one of the micro-force sensors 600.

[0119] In some embodiments, the micro-force sensor 600 can also replace the mode switch. Exemplarily, multiple micro-force sensors 600 are respectively arranged at two or more positions of the machine. By applying force to different micro-force sensors 600, the micro-force sensors 600 send corresponding signals to the controller, enabling the controller to control the motor or the corresponding response components to perform corresponding actions. Exemplarily, multiple micro-force sensors 600 are linearly arranged so that the multiple micro-force sensors form a force detection signal with linearly varying output through the user's sliding operation. By the user sliding to different positions on the micro-force sensor, different corresponding signals are output to the controller, enabling the controller to control the motor or the corresponding response components to perform corresponding actions. Exemplarily, the user can switch the forward and reverse rotation modes of the motor by different operations on the micro-force sensor 600. For example, touching on the left is for forward or reverse rotation, and touching on the right is for reverse or forward rotation. Exemplarily, the user can switch the speed mode of the motor, that is, switch the maximum rotation speed of the motor, by different operations on the micro-force sensor 600.

[0120] In some alternative embodiments, such as Figure 17As shown, the power tool is a non-motor-driven electrical device 200. The non-motor-driven electrical device 200 generally does not have a motor 12 and directly uses electrical energy to drive the working part 21. For example, a lighting device includes a lighting mechanism. The lighting mechanism includes a lamp head for emitting light. The lamp head includes a lamp head housing and a lamp board, where the lamp board is received in the lamp head housing. The lamp board includes light-emitting diode (LED) lamp beads or can also be COB (Chip On Board) lamp beads. The adjustment mechanism 19 includes an elongated force-receiving surface 71a, and the micro force sensor 600 is disposed on the back surface of the force-receiving surface 71a. The force-receiving surface 71a is a defined area of the housing 11. The adjustment mechanism 19 is used to obtain user input. The controller is communicatively connected to the adjustment mechanism 19 and determines the target working state of the lighting mechanism 21 according to the output of the adjustment mechanism 19. The working state includes the lighting of the lighting mechanism 21, the turning off of the lighting mechanism 21, and the output form of changing the light state. For example, the lighting state of the lighting mechanism 21. Among them, the adjustment mechanism 19 includes the micro force sensor 600. The user applies different forces to the micro force sensor 600, and the micro force sensor 600 outputs different signals to the controller. The controller determines the corresponding lighting state according to the different signals. Among them, the lighting state includes the brightness, color temperature, color of the lighting lamp, and lighting effects such as constant lighting, flashing, double flashing, breathing, or running lights, etc.

[0121] In some alternative embodiments, the working part 21 is a part of the power tool 10. The power tool 10 includes a motor 12, and the working part 21 serves as an auxiliary component of the power tool 10, such as the supplementary lighting of the power tool 10, the laser scale of the power tool 10, or the alarm mechanism of the power tool 10, etc. Taking the supplementary lighting of the power tool 10 as an example, the adjustment mechanism 19 includes an elongated force-receiving surface 71a, and the micro force sensor 600 is disposed on the back surface of the force-receiving surface 71a. The force-receiving surface 71a is a defined area of the housing 11. The adjustment mechanism 19 is used to obtain user input. The controller is communicatively connected to the adjustment mechanism 19 and determines the target working state of the working part 21 according to the output of the adjustment mechanism 19. The working state includes the sounding or lighting of the working part 21, the turning off of the working part 21, and the output form of changing the sound / light state. For example, the lighting state of the lighting lamp, and the lighting state of the lighting lamp is determined according to the output of the adjustment mechanism 19. The user applies different forces to the micro force sensor 600, and the micro force sensor 600 outputs different signals to the controller. The controller determines the corresponding lighting state according to the different signals. Among them, the lighting state includes the brightness, color temperature, color of the lighting lamp, and lighting effects such as constant lighting, flashing, double flashing, breathing, or running lights, etc.

[0122] As another specific embodiment, the power tool 10, the battery pack 300 or the charging device 500 includes a force-receiving member. The force-receiving member is formed on or connected to the housing of the power tool 10, the battery pack 300 or the charging device 500. The force-receiving member includes a force-receiving surface for receiving an external force and generating parameters of different deformation amounts when the external force changes. The parameters of the deformation amount include the values directly generated by the deformation of the force-receiving surface, such as height changes, curvature changes and other similar direct value changes. The parameters of the deformation amount also include the numerical parameters obtained by performing relevant calculations based on the values directly generated by the deformation. For example, the area or volume changes generated due to height changes, or the parameter values obtained after one or two calculations of the values.

[0123] In some embodiments, the force-receiving surface 71 is provided at the holding portion 113. Taking the power tool 10 as an example, a position for a user to grip when using or moving the power tool 10 is defined on the housing 11, that is, the holding portion 113 on the housing 11. The micro force sensor 600 is used to detect the change in the holding force of the user of the power tool 10 on the power tool 10. According to the change in the holding force, the use state of the power tool 10 is judged, and then the start of the protection program is started.

[0124] As Figures 18 to 19 shown, the power tool 10 is a hand-held power tool. Exemplarily, the hand-held power tool includes hand-held cutting tools, such as circular saws, chain saws, jigsaws and pruning machines. It also includes a rotary torque output tool, which can be understood as outputting rotary torque to a workpiece through a driven rotating output portion, such as a screwdriver, an electric drill, an impact tool, an angle grinder, a floor drill, etc.

[0125] As Figures 18 to 19As shown, taking the electric circular saw 100b as an example, the electric circular saw 100b includes a housing 11b, an output portion 13b, a motor 12b, and a base plate 15b. Among them, the output portion 13b includes an output shaft 131b and a cutting member 16b, and the output shaft 131b is used to mount the cutting member 16b. The cutting member 16b rotates around the output shaft 131b line. In this embodiment, the cutting member 16b is a circular saw blade. The motor 12b is disposed within the housing 11b, and the motor 12b is used to drive the output shaft 131b to rotate. The output shaft 131b is rotatably coupled to the motor 12b relative to the housing 11b. A power transmission mechanism is used to transmit the output power of the motor 12b to the output shaft 131b. The housing 11b is used to accommodate the motor 12b, and the output shaft 131b and the cutting member 16b are disposed outside the housing 11b. The base plate 15b is movably connected to the housing 11b, and the base plate 15b forms a base plate bottom surface 151b that contacts the workpiece. The base plate 15b forms a saw blade through hole 152b extending in the first direction Fb, and the saw blade can pass through the saw blade through hole 152b and protrude downward from the base plate bottom surface 151b. In this embodiment, the motor 12b specifically has a motor, and optionally, a brushless motor. Hereinafter, the motor will be used to replace the motor 12b, but this does not affect the substantial content of the present application.

[0126] Among them, the housing 11b includes a first housing 111b, and the first housing 111b forms or is connected with a grip portion 110b for gripping. In this embodiment, the grip portion 110b includes a first grip portion 112b. The first grip portion 112b is located at the rear end of the circular saw and can be gripped by the user to operate the circular saw for cutting actions. A control switch 81b and a safety switch 82b are further provided on the grip portion 110b, and the control switch 81b can only be triggered when the safety switch 82b is pressed. That is to say, two actions must be performed before the motor 12b or the motor 12b assembly can be started. Thus, the danger caused by a single operation is avoided. When the user grips the grip portion 110b, the user's hand gripping the grip portion 110b can trigger the safety switch 82b and the control switch 81b to start or stop the electric circular saw 100b.

[0127] The grip portion 110b further includes a second grip portion 114b. The second grip portion 114b is formed or connected to the first housing 111b. The second grip portion 114b is located at the front end of the circular saw and is used as an auxiliary handle. In one embodiment, the second grip portion 114b can also be an external handle mounted on the main housing 11b body, that is to say, the second grip portion 114b can be an auxiliary operation member separately mounted on the main housing 11b body.

[0128] As Figures 20 to 21As shown, the electric circular saw 100b further includes a controller 531b, which is disposed within the housing 11b. The controller 531b is used to control the rotation of the motor 12b. The controller 531b is disposed on a control circuit board 53b, and the control circuit board 53b includes: a PCB circuit board (Printed Circuit Board) and an FPC circuit board (Flexible Printed Circuitboard). The controller 531b employs a dedicated control chip, for example, a single-chip microcomputer or a microcontroller unit MCU (Microcontroller Unit). It should be noted that the control chip can be integrated within the controller 531b or can also be disposed independently of the controller 531b. Regarding the structural relationship between the drive chip and the controller 531b, this embodiment does not limit it.

[0129] In this embodiment, the electric circular saw 100b includes a micro force sensor 600, and the micro force sensor 600 is used to detect at least one of the parameter of the deformation amount of a preset part of the holding portion 110b or the parameter of the applied force value. It should be explained that the parameter of the deformation amount includes the value generated by the direct deformation of the stressed surface, such as the height change, the curvature change, and other similar direct numerical changes. The parameter of the deformation amount also includes the numerical parameter obtained by performing relevant calculations based on the value generated by the direct deformation. For example, the area or volume change caused by the height change, or the parameter value obtained after one or two calculations of the value. The parameter of the force value includes the value of the directly applied force on the stressed surface, or the parameter obtained by calculating the value of the force, such as the torque. Parameters generated by the force, such as the speed change, etc.

[0130] The controller 531b is connected to the micro force sensor 600. Optionally, the controller 531b is connected to the micro force sensor 600 through a digital signal. Optionally, the controller 531b is connected to the micro force sensor 600 through an analog signal. Optionally, the controller 531b is connected to the micro force sensor 600 through a wireless signal. The controller 531b is the main controller of the power tool. Optionally, the controller 531b is a separate controller controlled by the micro force sensor 600. The control circuit board 53b can be one piece. Optionally, the control circuit board 53b is two pieces or more.

[0131] The controller 531b is configured to: obtain the detection value of the micro force sensor 600, and control the motor 12b according to the detection value. In this embodiment, the detection value includes at least one of a parameter of the deformation amount of a preset part of the holding part, a parameter of the force value, a parameter of the change rate of the deformation amount, or a parameter of the change rate of the force value. When the detection value exceeds the threshold, the power supply to the motor 12b is stopped. In this embodiment, according to the user's gripping force or the change of the user's gripping force, the usage state of the circular saw 100b is judged. Optionally, according to the change of the gripping force, it is judged whether the power tool 10 has a kickback. When the controller 531b determines that there is a kickback, a kickback protection program is started. Exemplarily, when at least one of the parameter of the deformation amount of a preset part of the holding part, the parameter of the force value, the parameter of the change rate of the deformation amount, or the parameter of the change rate of the force value measured by the micro force sensor 600 exceeds the threshold, it is determined that the circular saw 100b has a kickback, and the controller 531b controls the motor 12b to cut off the power, the motor 12b to stop, or limits the output of the motor 12b to protect the user from being injured by the kickback of the circular saw 100b.

[0132] As Figure 19 shown, the micro force sensor 600 is disposed at the grasping portion of the second holding portion 114b. In some embodiments, the second holding portion 114b is provided with a grasping portion 115b for receiving fingers or supporting the palm according to the user's usage habit. The grasping portion 115b is provided with structural features that are easy for the user to identify, such as protrusions, or wavy structures or arc-shaped structures. The grasping portion 115b is provided with appearance surface treatment features that are easy for the user to identify, such as leather patterns, patterns, soft rubber sleeves, different materials embedded or different textures, etc. In some embodiments, the grasping portion 115b does not have features that are different from other positions of the second holding portion 114b. At this time, the grasping portion 115b is the position where the circular saw 100b maintains balance after the user lifts the circular saw 100b through the second holding portion 114b. In this embodiment, the preset part of the holding portion 110b is disposed at the grasping portion 115b for receiving fingers. Optionally, the grasping portion 115b for receiving fingers is set as a finger receiving portion. The finger receiving portion includes a force receiving surface 71e, and the force receiving surface 71e is used to receive an external force and generate different deformation amount parameters when the external force changes. The micro force sensor 600 outputs a corresponding signal to the controller 531b according to the deformation amount parameter of the force receiving surface 71e, or the micro force sensor 600 generates a corresponding force value parameter signal according to the deformation amount parameter of the force receiving surface 71e, and transmits the force value parameter signal to the controller 531b.

[0133] In some embodiments, the micro-force sensor 600 detects and outputs to the controller 531b the parameter of the pressure value of the force-receiving surface 71e during operation. When the controller 531b confirms that the parameter of the pressure value exceeds the pressure threshold, it determines that the electric circular saw 100b has a kickback. The controller 531b starts the Anti-kickback program, and the controller 531b controls the motor 12b to stop, controls the power supply to the motor 12b to stop, or limits the output of the motor 12b. In some embodiments, the micro-force sensor 600 detects and outputs to the controller 531b at least one of the parameter of the deformation amount, the parameter of the force value, the parameter of the change rate of the deformation amount, or the parameter of the change rate of the force value of the force-receiving surface 71e during operation. When the controller 531b confirms that at least one of the parameter of the deformation amount, the parameter of the force value, the parameter of the change rate of the deformation amount, or the parameter of the change rate of the force value exceeds the threshold, it determines that the electric circular saw 100b has a kickback. The controller 531b starts the Anti-kickback program, and the controller 531b controls the motor 12b to stop, controls the power supply to the motor 12b to stop, or limits the output of the motor 12b.

[0134] In some embodiments, the micro-force sensor 600 is disposed in the grasping portion 113b of the first holding portion 112b. In this embodiment, the grasping portion 113b of the first holding portion 112b is disposed behind the control switch 81b. Exemplarily, the grasping portion 113b of the first holding portion 112b is disposed within a range of one palm width (50 mm - 100 mm) behind the control switch 81b. In this embodiment, the first holding portion 112b includes a force-receiving surface 71e, and the force-receiving surface 71e is used to receive an external force and generate different parameters of the deformation amount when the external force changes. The micro-force sensor 600 outputs a corresponding signal to the controller 531b according to the parameter of the deformation amount of the force-receiving surface 71e, or the micro-force sensor 600 generates a parameter signal of the corresponding force value according to the parameter of the deformation amount of the force-receiving surface 71e, and transmits the parameter signal of the force value to the controller 531b.

[0135] In some embodiments, the micro force sensors 600 of the second gripping portion 114b and the micro force sensors 600 of the first gripping portion 112b cooperate to detect and output the parameter of the pressure value of the force receiving surface 71e during operation to the controller 531b. Exemplarily, the parameter detected by the micro force sensor 600 of the second gripping portion 114b is set as the parameter of the second pressure value, and the parameter detected by the micro force sensor 600 of the first gripping portion 112b is set as the parameter of the first pressure value. When the controller 531b confirms that the parameter of the second pressure value exceeds the second pressure threshold and the parameter of the first pressure value exceeds the first pressure threshold, it is determined that the circular saw 100b has a kickback. The controller 531b starts the Anti-kickback program, and the controller 531b controls the motor 12b to stop, controls the power supply to the motor 12b to stop, or limits the output of the motor 12b. Among them, the second pressure threshold is less than or equal to the first pressure threshold. In some embodiments, the micro force sensors 600 of the second gripping portion 114b and the micro force sensors 600 of the first gripping portion 112b cooperate to detect and output the parameter of the pressure value of the force receiving surface 71e during operation to the controller 531b. When the controller 531b confirms that the change rate of the parameter of the second pressure value exceeds the second change rate threshold and when the controller 531b confirms that the change rate of the parameter of the first pressure value exceeds the first change rate threshold, it is determined that the circular saw 100b has a kickback. The controller 531b starts the Anti-kickback program, and the controller 531b controls the motor 12b to stop, controls the power supply to the motor 12b to stop, or limits the output of the motor 12b.

[0136] In some embodiments, the force receiving surface 71e is provided on the gripping portion 110b of the power tool or the handheld power tool. The force receiving surface 71e is used to receive an external force and output different deformation amount parameters when the external force changes. The micro force sensor 600 outputs a corresponding signal to the controller 531b according to the deformation amount parameter of the force receiving surface 71e, or the micro force sensor 600 generates a parameter signal of the corresponding force value according to the deformation amount parameter of the force receiving surface 71e and sends the parameter signal of the force value to the controller 531b. The controller 531b determines whether the cutting feed direction of the power tool 10 or the handheld power tool is consistent with the preset direction according to the change of the gripping force applied by the user on the gripping portion 110b. When the controller 531b determines that the cutting direction is inconsistent with the preset direction or the deviation exceeds the standard value, the controller 531b starts the status indicating portion to give a prompt to the user or the controller 531b limits the output of the motor 12b to avoid the user's cutting deviation. For example, power tools such as circular saws, jigsaws, and track saws are power tool products with relatively stable feed directions during the cutting process.

[0137] In some embodiments, the force-receiving surface 71e is provided on the gripping portion 110b of a power tool or a hand-held power tool. The micro force sensor 600 outputs a corresponding signal to the controller 531b according to the parameter of the deformation amount of the force-receiving surface 71e, or the micro force sensor 600 generates a parameter signal of a corresponding force value according to the parameter of the deformation amount of the force-receiving surface 71e, and sends the parameter signal of the force value to the controller 531b. The controller 531b judges the magnitude of the thrust force received by the power tool 10 or the hand-held power tool according to the change of the gripping force applied by the user on the gripping portion 110b and sends a signal to the controller 531b. The controller 531b judges whether the output torque can meet the cutting requirement according to the value of the thrust force, and further, the controller 531b controls the operating state of the motor 12b. Optionally, when the micro force sensor detects an increase in the gripping force, or an increase in the gripping force in one direction or an increase in the gripping force change rate, it is determined that the torque output by the current motor 12b is less than the torque required for cutting the workpiece, and cutting becomes difficult. Then, the controller 531b outputs a signal for adjusting the output torque of the motor 12b, for example, increasing the output torque. Optionally, when the micro force sensor 600 detects an increase in the gripping force, or an increase in the gripping force in one direction or an increase in the gripping force change, it is determined that the cutting work starts. Then, the controller 531b outputs a signal for starting the motor 12b.

[0138] As Figure 22 shown, in another embodiment, a drill 100c is taken as an example. The drill 100c includes a housing 11c, a motor 12c and an output portion 20c. The output portion 20c includes an output shaft 131c for connecting a working accessory and driving the working accessory to rotate. A clamping assembly 132c is provided at the front end of the output shaft 131c, which can clamp corresponding working accessories when realizing different functions, such as a screwdriver, a drill bit, a socket, etc. The housing 11c includes a motor housing 111c for accommodating the motor 12c and an output housing 112c for accommodating at least part of the output portion 20c. The output housing 112c is connected to the front end of the motor housing 111c. The housing 11c also forms or is connected with a gripping portion 113c for the user to operate. The gripping portion 113c and the motor housing 111c form a T-shaped or L-shaped structure, which is convenient for the user to grip and operate. One end of the gripping portion 113c is connected with a power supply device.

[0139] In this embodiment, a trigger 81c is provided on the holding part 113c for a user to operate and control the motor 12c. The electric drill 100c further includes a controller 531c, which is arranged inside the housing 11c. The controller 531c is used to control the rotation of the motor 12c. The controller 531c is arranged on the control circuit board 53c, and the control circuit board 53c includes: a PCB circuit board (Printed Circuit Board) and an FPC circuit board (Flexible Printed Circuit board). The controller 531c adopts a dedicated control chip, for example, a single-chip microcomputer or a microcontroller unit MCU (Microcontroller Unit). It should be noted that the control chip can be integrated into the controller 531c or can also be arranged independently of the controller 531c. Regarding the structural relationship between the drive chip and the controller 531c, this embodiment does not limit it.

[0140] In this embodiment, the electric drill 100c includes a micro force sensor 600, which is used to detect at least one of the parameter of the deformation amount of a preset part of the holding part 113c or the parameter of the applied force value. It should be explained that the parameter of the deformation amount includes the value directly generated by the deformation of the stressed surface, such as the height change, the curvature change and other similar direct numerical changes. The parameter of the deformation amount also includes the numerical parameter obtained by performing relevant calculations based on the value directly generated by the deformation, for example, the area or volume change generated due to the height change, or the parameter value obtained after performing one or two calculations on the value. The parameter of the force value includes the value of the directly applied force on the stressed surface, or the parameter obtained by calculating the value of the force, such as the torque. Parameters generated by the force, such as the speed change, etc.

[0141] The controller 531c is connected to the micro force sensor 600. Among them, optionally, the controller 531c is connected to the micro force sensor 600 through a digital signal. Optionally, the controller 531c is connected to the micro force sensor 600 through an analog signal. Optionally, the controller 531c is connected to the micro force sensor 600 through a wireless signal. The controller 531c is the main controller of the power tool. Optionally, the controller 531c is a controller independently controlled by the micro force sensor 600. The control circuit board 53c can be one piece. Optionally, the control circuit board 53c is two pieces or more.

[0142] The controller 531c is configured to control the operating state of the motor 12c according to the detected values detected by the micro force sensor 600. In this embodiment, the detected values include at least one of the parameters of the deformation amount of a preset part of the holding part, the parameters of the force value, the parameters of the change rate of the deformation amount, or the parameters of the change rate of the force value. In this embodiment, when at least one of the parameters of the deformation amount detected by the micro force sensor 600, the parameters of the force value, the change rate of the parameters of the deformation amount detected by the micro force sensor 600, or the change rate of the parameters of the force value exceeds the threshold, the power supply to the motor 12c is stopped. In this embodiment, the usage state of the electric drill 100c is judged according to the holding force of the user or the change of the holding force of the user. Optionally, according to the change of the holding force, it is judged whether the electric drill 100c twists the hand during the torque output process. When the controller 531c judges that the hand is twisted, a hand-twisting protection program is started. Exemplarily, when it is determined that there is a risk of hand-twisting of the electric drill 100c according to the detected value of the micro force sensor 600 exceeding the threshold, the controller 531c controls the motor 12c to cut off the power, the motor 12c to stop, or limits the output of the motor 12c to protect the user from being injured by the electric drill 100c twisting the hand. Exemplarily, when it is determined that there is a risk of hand-twisting of the electric drill 100c according to the detected value of the micro force sensor 600 exceeding the threshold, after the controller 531c controls the motor 12c to limit the output first, the motor 12c changes the rotation direction.

[0143] The holding part 113c includes a force-receiving surface 71f, and the force-receiving surface 71f is used to receive an external force and generate different deformation amount parameters when the external force changes. The micro force sensor 600 outputs a corresponding signal to the controller 531c according to the deformation amount parameters of the force-receiving surface 71f, or the micro force sensor 600 generates a corresponding force value parameter signal according to the deformation amount parameters of the force-receiving surface 71f and sends the force value parameter signal to the controller 531c.

[0144] In some embodiments, during operation, the micro force sensor 600 detects and outputs the parameter of the pressure value of the force-receiving surface 71f to the controller 531c. When the controller 531c confirms that the parameter of the pressure value exceeds the pressure threshold, it determines that the electric drill 100c has a torque wrenching situation. The controller 531c starts the anti-torque wrenching program, and the controller 531c controls the motor 12c to stop or controls to stop supplying power to the motor 12c. In some embodiments, during operation, the micro force sensor 600 detects and outputs the parameter of the pressure value of the force-receiving surface 71f to the controller 531c. When the controller 531c confirms that the change rate of the parameter of the pressure value exceeds the change rate threshold, it determines that the electric drill 100c has a torque wrenching situation. The controller 531c starts the anti-torque wrenching program, and the controller 531c controls the motor 12c to stop, controls to stop supplying power to the motor 12c or limits the output of the motor 12c. According to the operating habit, the force-receiving surface 71f is arranged starting from below the trigger 81c. According to the width of the palm, the extension length of the force-receiving surface 71f is 70 mm to 100 mm.

[0145] In some embodiments, the electric drill 100c further includes a gyroscope sensor for detecting the change in the torsional angle or torsional acceleration of the electric drill 100c. The gyroscope sensor can be a single-axis, two-axis or three-axis microelectromechanical system (MEMS) sensor or a rotational sensor. Other types of sensors also belong to the disclosure of this application. When the controller 531c receives the detection data of the gyroscope sensor greater than the threshold and combines with the detection data of the micro force sensor 600 also exceeding the threshold, it determines that the electric drill 100c has a torque wrenching situation. The controller 531c starts the anti-torque wrenching program, and the controller 531c controls the motor 12c to stop or controls to stop supplying power to the motor 12c.

[0146] In some embodiments, regardless of whether the handheld power tool is a handheld cutting tool or a rotary torque output tool. Optionally, the force-receiving surfaces 71e, 71f are arranged on the holding parts 110b, 113c of the power tool or the handheld power tool. The force-receiving surfaces 71e, 71f are used to receive external forces and produce parameters of different deformation amounts when the external forces change. The micro force sensor 600 outputs corresponding signals to the controller according to the parameters of the deformation amounts of the force-receiving surfaces 71e, 71f, or the micro force sensor 600 generates a parameter signal of the corresponding force value according to the parameters of the deformation amounts of the force-receiving surfaces 71e, 71f and sends the parameter signal of the force value to the controller. According to the change in the holding force, it is judged whether the handheld power tool has a situation of dropping in the motor starting state. When the controller judges and determines the dropping, it starts the dropping protection program. The controller controls the motor to stop.

[0147] Optionally, for a push-type power tool, such as a push-type lawn mower, according to the change in the holding force, including the magnitude of the holding force and the direction of the holding force application, the difficulty of the user's pushing, the dragging direction, and whether it is determined whether the user is holding stably are judged, and the controller controls the self-propelled program of the push-type power tool according to the results of the above judgments.

[0148] As Figure 21 shown, this embodiment also discloses a control method for a handheld power tool, which specifically includes: S110. Detect at least one of the parameter of the deformation amount of the preset part of the holding part of the handheld power tool or the parameter of the applied force value through a micro force sensing device.

[0149] S120. Obtain the detection value of the micro force sensor through the controller, where the detection value includes at least one of the parameter of the deformation amount of the preset part of the holding part, the parameter of the force value, the parameter of the change rate of the deformation amount, or the parameter of the change rate of the force value.

[0150] S130. When the detection value exceeds the threshold, limit the operation of the motor through the controller.

[0151] In some embodiments, the force-receiving surfaces 71e, 71f are used to receive external forces and generate different deformation amount parameters when the external forces change. The micro force sensor 600 outputs corresponding signals to the controller according to the deformation amount parameters of the force-receiving surfaces 71e, 71f, or the micro force sensor 600 generates a corresponding force value parameter signal according to the deformation amount parameters of the force-receiving surfaces 71e, 71f and sends the force value parameter signal to the controller. The power tool 10 includes a storage for collecting the holding force data detected by the micro force sensor during the user's use of the power tool. The holding force data includes, but is not limited to, the holding direction, the commonly used holding position, and the commonly used holding force. This is convenient for designers to collect customer usage habit data and perform better human-machine design on the product. In some embodiments, the power tool 10 includes a server, and the server includes a storage and a processor. The processor can process the data according to a set period. Optionally, the server is a local server. Optionally, the server is a cloud server. In some embodiments, the micro force sensor is activated in a specific state, for example, in a manufacturing environment or an experimental environment in a factory, to detect whether the operator holds or operates in a compliant manner. When the controller 531c determines that it does not meet the requirements according to the detection data of the micro force sensor, an alarm or shutdown process is started.

[0152] As a specific implementation manner of this embodiment, the micro force sensor can be applied to torque determination and torque setting of the power tool. As Figure 16As described above, the power tool 10 includes a motor 12 that rotatably drives and is coupled to an output portion 13 of the motor 12. A force-receiving member receives the force formed by the movement of the motor 12. The force-receiving member includes a moving portion 14 driven by the motor 12 to move or a supporting portion 15 that supports the moving portion 14. The moving portion 14 is formed or connected to the output portion 13. Optionally, the moving portion 14 includes an output shaft driven by the motor 12 for outputting torque, or at least one of a gear transmission structure or a cylinder disposed between the drive shaft and the output shaft of the motor 12. Optionally, the moving portion 14 may also be the drive shaft for the motor 12 to output torque outward.

[0153] The micro force sensor 600 is connected to the moving portion 14, and the mounting method is similar to that of the battery pack 300 embodiment. The supporting portion 15 is directly or indirectly connected to the moving portion 14. When the moving portion 14 is driven by the motor 12 to move, the supporting portion 15 undergoes a deformation or displacement in response to the movement. The supporting portion 15 includes a bearing 151 for supporting a shaft (e.g., a drive shaft, an output shaft, a mandrel, a gear shaft), a housing 152 of a transmission member, a housing portion 11 of the housing for fixing the transmission member, or a component that vibrates due to the operation of the motor 12. The micro force sensor 600 is connected to the supporting portion 15. The micro force sensor 600 is used to detect the torque generated by the output portion 13 of the power tool 10. It can be understood that when the output portion 13 generates torque, the output portion 13 or the moving portion 14 or the supporting portion 15 will undergo deformation or displacement. The micro force sensor 600 outputs the torque generated by the output portion 13 through at least one of detecting the parameter of the deformation amount or the force value parameter through the program of the controller. In products with fixed torque control and precise torque control, the output torque of the output portion 13 can be accurately obtained.

[0154] Exemplarily, continue to refer to Figures 22 to 25 and Figures 27 to 28, the power tool 10 is specifically a drill 100c. The drill 100c includes: a housing 11c, a motor 12c, and an output unit 20c. The output unit 20c is rotatably coupled to the motor 12c. The motor 12c drives the rotation of the output unit 20c. In this embodiment, the output unit 20c includes a transmission mechanism 14c and an output mechanism 13c. Among them, the housing 11c includes a motor housing 11c body for accommodating the motor 12c and an output housing 112c for accommodating at least part of the output mechanism 13c. The output housing 112c is connected to the front end of the motor housing 11c body. The housing 11c also forms or is connected with a grip portion 113c for the user to operate. The grip portion 113c and the motor housing 11c body form a T-shaped or L-shaped structure, which is convenient for the user to hold and operate. In some embodiments, the grip portion 113c and the motor housing 11c body form a straight cylindrical structure. One end of the grip portion 113c is connected with a battery pack 300c. In this embodiment, the battery pack 300c is detachably connected to the grip portion 113c. In some alternative embodiments, the battery pack 300c is built into the housing 11c.

[0155] The output mechanism 13c is used to receive the torque provided by the motor 12c and output the torque. The output mechanism 13c includes an output shaft 131c for connecting a working accessory and driving the working accessory to rotate. The motor 12c drives the output shaft 131c to rotate about the output axis 102c. A clamping mechanism 132c or a receiving portion is provided at the front end of the output shaft 131c, which can clamp the corresponding working accessory when realizing different functions, such as a screwdriver, a drill bit, a socket, etc. The output shaft 131c is used to output torque, and the output shaft 131c rotates about the output axis 102c. The transmission mechanism 14c is arranged between the motor 12c and the output mechanism 13c and is used to transmit power between the motor 12c and the output mechanism 13c.

[0156] The output mechanism 13c further includes a torque adjustment mechanism 15c, which is configured to set the output torque threshold of the power tool 100, that is to say, the user sets the maximum value of the output torque of the drill 100c through the torque adjustment mechanism 15c.

[0157] The drill 100c further includes: a controller 531c is arranged in the housing 11c and is used to control the operating state of the motor 12c.

[0158] It further includes: a micro-force sensor 600 for detecting at least one of the parameter of the deformation amount of a preset part of the output shaft 131c or the parameter of the applied force value. It should be explained that the parameter of the deformation amount includes the value directly generated by the deformation of the force-bearing surface, such as the change in height, the change in curvature, and other similar direct numerical changes. The parameter of the deformation amount also includes the numerical parameter obtained by performing relevant calculations based on the value directly generated by the deformation. For example, the change in area or volume due to the change in height, or the parameter value obtained after one or two calculations of the value. The parameter of the force value includes the value of the directly applied force on the force-bearing surface, or the parameter obtained by calculating the value of the force, such as torque. Parameters generated by the force, such as the change in speed, etc.

[0159] For convenience of reference, the micro-force sensor provided for detecting the preset part of the output shaft 131c is set as the first micro-force sensor 600b. The controller 531c is connected to the first micro-force sensor 600b. Among them, optionally, the controller 531b and the first micro-force sensor 600b are connected by a digital signal. Optionally, the controller 531b and the first micro-force sensor 600b are connected by an analog signal. Optionally, the controller 531b and the first micro-force sensor 600b are connected by a wireless signal. The controller 531c obtains at least one of the parameter of the detected deformation amount or the parameter of the force value of the first micro-force sensor 600b, and controls the motor 12c according to at least one of the parameter of the deformation amount or the parameter of the force value. In this embodiment, the first micro-force sensor 600b outputs to the controller 531c the torque signal output by the output shaft 131c of the electric drill 100c detected or the parameter signal of the deformation amount of the output shaft 131c due to the output torque. The controller 531c is configured to adjust the output of the motor 12c according to the signal of the first micro-force sensor 600b.

[0160] Exemplarily, when the controller 531c determines according to the signal of the first micro-force sensor 600b that the output torque of the motor 12c reaches the output torque threshold, the controller 531c controls the motor 12c to stop, stop supplying electrical energy to the motor 12c, or control the motor 12c to stop and start intermittently. In this embodiment, the first micro-force sensor 600b is used to detect the output torque. When the output torque reaches the threshold, the controller 531c limits the torque output of the motor 12c, replacing the mechanical clutch mechanism in the prior art and reducing the complexity of the mechanical structure of the product. The first micro-force sensor 600b outputs the torque generated by the output part 20c by detecting at least one of the parameter of the deformation amount or the parameter of the force value, and accurately obtains the output torque of the output part 20c, which better protects the product use safety and component safety and extends the service life of the product.

[0161] In some embodiments, the first micro-force sensor 600b is disposed on the output mechanism 13c or the output housing 112c to detect the load torque applied to the output shaft 131c. It can be understood that the load torque applied to the output shaft 131c is proportional to the torque output by the output shaft 131c. In some embodiments, the load torque applied to the output shaft 131c is substantially the same as the torque output by the output shaft 131c.

[0162] As Figures 23 - 24 shown, a target member 17c is disposed between the transmission mechanism 14c and the output housing 112c to receive the load torque of the output shaft and deform a preset position or apply pressure to the preset position. There is a force transmission between the target member 17c and the output housing 112c. The force applied by the target member 17c to the output housing 112c is proportional to the load torque applied to the output shaft 131c. Optionally, the force applied by the target member 17c to the output housing 112c is substantially the same as the load torque applied to the output shaft 131c. Optionally, the force applied by the target member 17c to the output housing 112c is proportional to the torque output by the output shaft 131c. Optionally, the force applied by the target member 17c to the output housing 112c is substantially the same as the torque output by the output shaft 131c.

[0163] The first micro-force sensor 600b is disposed on the output housing 112c. The force-receiving surface 71g is disposed on the output housing 112c. The force-receiving surface 71g is used to receive the force applied by the target member 17c and generate parameters of different deformation amounts when the force applied by the target member 17c changes. The first micro-force sensor 600b outputs a corresponding signal to the controller 531c according to the parameter of the deformation amount of the force-receiving surface 71g, or the first micro-force sensor 600b generates a parameter signal of a corresponding force value according to the parameter of the deformation amount of the force-receiving surface 71g, and transmits the parameter signal of the force value to the controller 531c.

[0164] Exemplarily, the first micro-force sensor 600b and the target member 17c are respectively disposed on two sides of the same position on the output housing 112c, that is to say, the first micro-force sensor 600b and the target member 17c are substantially opposite to each other.

[0165] In this embodiment, the target member 17c includes steel balls. The force-receiving surface 71g is the surface where the steel balls abut against the output housing 112c. The transmission mechanism 14c forms or connects to a limiting portion 143c for restricting the circumferential movement of the steel balls relative to the transmission mechanism 14c from exceeding a preset range. The transmission mechanism 14c includes: a reduction gear system. Optionally, the transmission mechanism 14c includes a planetary gear set 141c for speed reduction, and the number of planetary gear sets 141c can be one stage or multiple stages. The planetary gear set 141c converts the output speed of the motor 12c according to a certain transmission ratio to achieve an appropriate torque. In this embodiment, the planetary gear set 141c includes planetary gears 145c, a planet carrier 146c for mounting the planetary gears 145c, and an internal gear ring 142c meshing with the planetary gears 145c. A sun gear (not shown) is formed or connected to the drive shaft, and the planetary gears 145c mesh with the sun gear. Among them, the internal gear ring 142c of the planetary gear set 141c closest to the output shaft 131c is connected to the housing 11c and does not rotate relative to the housing 11c. Optionally, the internal gear ring 142c is connected to the output housing 112c and does not rotate relative to the output housing 112c. A limiting portion 143c is formed on the side of the internal gear ring 142c facing the output shaft 131c. Optionally, the limiting portion 143c is a protrusion extending axially toward the output shaft 131c. The protrusion is provided with inclined surfaces 144c on both circumferential sides of the internal gear ring 142c. The steel balls respectively abut against the internal gear ring 142c and the output housing 112c on both axial sides. The steel balls abut against the inclined surfaces 144c of the protrusion circumferentially.

[0166] When the electric drill 100c rotates to output torque, the internal gear ring 142c receives the torsional torque applied from the output shaft 131c, and the internal gear ring 142c transmits the received torsional torque to the steel balls through the protrusion. Due to the setting of the inclined surfaces 144c of the protrusion, the torque received by the steel balls in the circumferential direction will generate a component torque in the axial direction, and then the steel balls apply a thrust force to the output housing 112c axially. Therefore, the force-receiving surface 71g deforms, and the first micro force sensor 600b outputs a corresponding signal to the controller 531c according to the parameter of the deformation amount of the force-receiving surface 71g, or the first micro force sensor 600b generates a parameter signal of a corresponding force value according to the parameter of the deformation amount of the force-receiving surface 71g, and transmits the parameter signal of the force value to the controller 531c. When the controller 531c determines that the output torque of the output shaft 131c exceeds the set threshold, the output of the motor 12c is restricted.

[0167] Optionally, when the controller 531c determines that the output torque of the output shaft 131c reaches a preset condition, it adjusts the output of the motor 12c. For example, according to the relationship between the torque value received by the output shaft 131c and the preset value, it adjusts the output of the motor 12c, including the output speed or output torque, including increasing the output speed or increasing the output torque, maintaining the output speed or increasing the output torque. Through the measurement accuracy of the first micro force sensor 600b, a signal is accurately sent to the controller 531c. The controller 531c can accurately confirm the actual torque and adjust the operation of the motor 12c according to the relationship between the actual torque and the preset torque to achieve the purpose of accurate torque setting. It can be understood that this is not limited to the electric drill 100c product and is applicable to other impact or torque output tools.

[0168] In some alternative embodiments, the first micro force sensor 600b is connected to the internal gear ring 142c, and the force receiving surface 71g is provided on the internal gear ring 142c. When the target part 17c is subjected to force, the force receiving surface 71g of the internal gear ring 142c deforms due to the torque. The first micro force sensor 600b outputs a corresponding signal to the controller 531c according to the parameter of the deformation amount of the force receiving surface 71g, or the first micro force sensor 600b generates a parameter signal of the corresponding force value according to the parameter of the deformation amount of the force receiving surface 71g and sends the parameter signal of the force value to the controller 531c. When the controller 531c determines that the output torque of the output shaft 131c exceeds the set threshold, it limits the output of the motor 12c. Optionally, when the controller 531c determines that the output torque of the output shaft 131c reaches a preset condition, it adjusts the output of the motor 12c. For example, according to the relationship between the torque value received by the output shaft 131c and the preset value, it adjusts the output of the motor 12c, including the output speed, output torque or related electrical parameters, including increasing the output speed or increasing the output torque or increasing the current or changing the commutation parameter, etc., maintaining the output speed or maintaining the output torque or maintaining the current or maintaining the commutation parameter, etc.

[0169] In some embodiments, the first micro force sensor 600b is connected to the output shaft 131c. The force-receiving surface 71g is disposed on the output shaft 131c. When the force-receiving surface 71g of the output shaft 131c deforms due to torque, the first micro force sensor 600b outputs a corresponding signal to the controller 531c according to the parameter of the deformation amount of the force-receiving surface 71g, or the first micro force sensor 600b generates a parameter signal corresponding to the force value according to the parameter of the deformation amount of the force-receiving surface 71g, and transmits the parameter signal of the force value to the controller 531c. When the controller 531c determines that the output torque of the output shaft 131c exceeds the set threshold, the output of the motor 12c is restricted. Optionally, when the controller 531c determines that the output torque of the output shaft 131c reaches a preset condition, the output of the motor 12c is adjusted. For example, according to the relationship between the torque value received by the output shaft 131c and the preset value, the output of the motor 12c is adjusted, including the output speed, output torque, or related electrical parameters, including increasing the output speed, increasing the output torque, increasing the current, or changing the commutation parameter, etc., maintaining the output speed, maintaining the output torque, maintaining the current, or maintaining the commutation parameter, etc. In this embodiment, the first micro force sensor 600b directly detects the parameter of the deformation amount of the output shaft 131c due to the load torque received.

[0170] Optionally, the first micro force sensor 600b is used to detect at least one of the parameter of the deformation amount caused by the load force of other components of the power tool or the parameter of the applied force value. When the controller 531c determines that the load force received exceeds the threshold, the output of the motor 12c is restricted or an alarm operation is performed. The alarm operation includes changing the operating state of the motor 12c. The alarm operation also includes using a photoelectric alarm for prompting.

[0171] As Figure 28 shown, this embodiment also discloses a control method for a power tool, specifically including: S210. Detect at least one of the parameter of the deformation amount of a preset part of the output part of the power tool or the parameter of the applied force value through a micro force sensing device.

[0172] S220. Obtain the detection value of the micro force sensor through the controller and convert the detection value into a torque value; wherein, the detection value includes at least one of the parameter of the deformation amount of a preset part of the output part, the parameter of the force value, the parameter of the change rate of the deformation amount, or the parameter of the change rate of the force value.

[0173] S230. Control the operation of the motor of the power tool through the controller according to the torque value.

[0174] In some embodiments, as Figures 23 to 25As shown, the torque adjustment mechanism 15c further includes a torque setting unit 151c for being operated to set a threshold value of the output torque. Exemplarily, the torque setting unit 151c includes an electronic interaction component, such as a control panel. The control panel includes components having input and display functions, such as buttons and a display screen, a touch screen, a linear touchpad, and a display screen, etc. The user inputs an operation instruction through the control panel, and the received operation instruction is sent to the controller 531c in the form of a digital signal, and the controller 531c controls the setting of the threshold value of the output torque.

[0175] Exemplarily, the torque setting unit 151c includes a communication unit and an external device, and the communication unit is used for receiving an operation signal of the external device. In some embodiments, the communication unit includes a wireless communication device such as a remote wireless network. The wireless communication device communicates using other protocols (such as Wi-Fi, cellular protocols, proprietary protocols, etc.) on different types of wireless networks. For example, the wireless communication device can be configured to communicate via Wi-Fi through, for example, the Internet, a local area network (“LAN”), a wide area network (“WAN”), or a combination thereof, or communicate through a piconet (for example, using infrared or NFC communication). In other embodiments, the wireless communication device can be a short-range communication protocol (such as Bluetooth), and in other embodiments, the wireless communication device can be a wired network using, for example, a serial protocol (such as USB, USB-C, FireWire, etc.). The external device includes a mobile device, such as a smart phone, a smartphone, a tablet computer, a cellular phone, a laptop computer, a smart wearable device, etc. The user communicates with the communication unit through the external device, and the communication unit sends the received operation instruction to the controller 531c in the form of a digital signal, and the controller 531c controls the setting of the threshold value of the output torque.

[0176] In some embodiments, the torque setting unit 151c includes a torque cup. The torque cup includes an actuating sleeve 161c that is operably rotatable about the output shaft 131c for a user to set a threshold value of the output torque. When the actuating sleeve 161c rotates, the actuating sleeve 161c undergoes an axial displacement parallel to the extending direction of the output shaft 131c, i.e., the output axis 102c. In this embodiment, the torque cup also includes a micro force sensor 600. For convenience of reference, the micro force sensor 600 disposed in the torque cup is set as the second micro force sensor 600c. The second micro force sensor 600c is disposed near the actuating sleeve 161c, and the second micro force sensor 600c is configured to detect at least one of the parameter of the deformation amount of a preset part near the actuating sleeve 161c or the parameter of the applied force value when the brake sleeve rotates. In some embodiments, the force-receiving surface of the second micro force sensor 600c intersects the output shaft 131c. It can be understood that the extending direction of the force-receiving surface of the micro force sensor 600 intersects the extending direction of the output shaft 131c. Among them, "intersect" includes spatial intersection and planar intersection. Optionally, the extending direction of the force-receiving surface of the micro force sensor 600 is perpendicular to the extending direction of the output shaft 131c. Optionally, the extending direction of the force-receiving surface of the micro force sensor 600 is not parallel to the extending direction of the output shaft 131c.

[0177] In this embodiment, the controller 531c is connected to the second micro force sensor 600c. Among them, optionally, the controller 531c is connected to the second micro force sensor 600c through a digital signal. Optionally, the controller 531c is connected to the second micro force sensor 600c through an analog signal. Optionally, the controller 531c is connected to the micro force sensor 600 through a wireless signal.

[0178] The controller 531c is configured to obtain the parameter of the deformation amount or the parameter of the force value detected by the second micro force sensor 600c, and determine the threshold value of the output torque according to the parameter of the deformation amount or the parameter of the force value. When the threshold value of the output torque and the actual output torque meet the preset requirements, the operation of the motor 12c is adjusted.

[0179] In some embodiments, the second micro force sensor 600c and the first micro force sensor 600b are two separate components. In some embodiments, the second micro force sensor 600c and the first micro force sensor 600b are the same component, that is, only one micro force sensor is used.

[0180] In this embodiment, when the controller 531c determines that the output torque of the output shaft 131c exceeds the threshold value of the output torque, the output of the motor 12c is limited. Using the second micro force sensor 600c as the detection component, the detection sensitivity is high. Compared with the mechanical torque cup in the prior art, the operation habit is not changed, but the component complexity is low, the product parts are reduced, and the assembly difficulty is low.

[0181] As shown Figures 24 to 25 in the figure, the torque cup further includes an elastic member 162c, a driving portion 163c, and a guiding portion 164c. Among them, the elastic member 162c is configured to apply a corresponding force to the second micro force sensor 600c when the actuating sleeve 161c rotates and axially displaces in a direction parallel to the extending direction of the output shaft 131c. Optionally, the elastic member 162c is a helical spring. The driving portion 163c is formed or connected to the actuating sleeve 161c. The driving portion 163c is connected or abuts against the elastic member 162c, and is configured to compress the elastic member 162c and cause the elastic member 162c to generate a force applied to the second micro force sensor 600c. The driving portion 163c rotates with the actuating sleeve 161c under preset conditions. Optionally, the driving portion 163c rotates coaxially and synchronously with the actuating sleeve 161c. Optionally, after the actuating sleeve 161c rotates N degrees or N turns, the driving portion 163c rotates M degrees or M turns. The rotation relationship between the driving portion 163c and the actuating sleeve 161c is set according to actual needs. This does not affect the substantial content of the present application. The guiding portion 164c is configured to convert the rotational motion applied by the user into the axial movement of the driving portion 163c along the output shaft 131c. Optionally, the guiding portion 164c includes a spiral, and the driving portion 163c can move axially along the output shaft 131c while rotating along the spiral.

[0182] Optionally, the guiding portion 164c is formed or connected to the output housing 112c. Optionally, the guiding portion 164c is a spiral formed on the outside of the output housing 112c. The driving portion 163c engages with the spiral. In this embodiment, at least a part of the output housing 112c extends into the actuating sleeve 161c. Along the axial direction of the output shaft 131c, a part of the actuating sleeve 161c coincides with the output housing 112c. Along the axial direction of the output shaft 131c, a part of the actuating sleeve 161c coincides with the elastic member 162c.

[0183] In this embodiment, the force receiving surface 71g is provided on the elastic member 162c or the driving portion 163c. The force receiving surface 71g is configured to receive the force generated by the compression of the elastic member 162c by the driving portion 163c and produce different deformations when the force changes. The micro force sensor 600 outputs a corresponding signal to the controller 531c according to the parameter of the deformation amount of the force receiving surface 71g, or the micro force sensor 600 generates a parameter signal corresponding to the force value according to the parameter of the deformation amount of the force receiving surface 71g, and transmits the parameter signal of the force value to the controller 531c. In this embodiment, the controller 531c determines the threshold value of the output torque according to the measurement data of the acquired second micro force sensor 600c. Among them, the controller 531c can set multiple threshold values of the output torque according to preset conditions. For example, gears are used to represent high gear, medium gear, and low gear. For another example, since the use of the micro force sensor 600 makes torque detection more accurate, the current output torque threshold can be directly represented by torque values such as 20 N and 50 N.

[0184] Exemplarily, the power tool 10 can also be a cutting tool. Continuing to refer to Figures 18 to 19 , for example, a circular saw 100b. The output part 13b includes an output shaft 131b and a cutting member 16b. The output shaft 131b is used to mount the cutting member 16b. The micro force sensor 600 is used to detect the load torque received by the output part 13b of the power tool. When the output part 13b receives the load torque, it will cause the output part 13b to deform or displace. The micro force sensor 600 detects the deformation or displacement of the output part 13b caused by the load torque. The torque generated by the output part 13b is output through the program of the controller. The load torque received by the output shaft 131b is proportional to the torque output by the output shaft 131b. In some embodiments, the load torque received by the output shaft 131b is substantially the same as the torque output by the output shaft 131b.

[0185] In this embodiment, the torque output by the output shaft 131b of the circular saw is detected by the micro force sensor 600, and the output of the motor is adjusted according to the magnitude of the output torque. Optionally, when the micro force sensor detects that the output shaft 131b of the circular saw is receiving a load torque, it is determined that the cutting member 16b is in contact with the workpiece to be cut, and then the controller 531b outputs a signal to control the motor 12b to start according to a preset program. Optionally, when the load torque received by the output shaft 131b of the circular saw detected by the micro force sensor 600 reaches a corresponding relationship with the preset torque, the controller 531b outputs a signal to control the motor 12b to adjust the output according to a preset program. For example, when the preset torque is exceeded, the controller 531b determines that the current output torque of the motor 12b is too low, so the controller 531b adjusts the motor 12b to output at a higher torque.

[0186] In some embodiments, continuing to refer to Figure 22, taking the electric drill 100c in the above text as an example. In the related art, the target speed of the motor 12c is adjusted according to the trigger stroke. Among them, the trigger is coupled with a sliding rheostat. When the trigger stroke is different, the analog signal output by the sliding rheostat is different. And the trigger stroke is positively correlated with the duty cycle of the PWM signal of the motor 12c, and the duty cycle of the PWM signal is positively correlated with the target speed of the motor 12c. When the trigger stroke of the trigger switch is small, the duty cycle of the PWM signal is also small. At this time, the target speed of the motor 12c is also small. The structure of the related art for adjusting the target speed of the motor 12c by the trigger needs to add a sliding rheostat, which has a large volume and a limited service life.

[0187] In this embodiment, as Figure 29a - 29c shown, a micro force sensor 600 is disposed near the trigger 81c. The micro force sensor 600 is configured to detect at least one of the parameter of the deformation amount of a preset part when the trigger 81c is pulled or the parameter of the applied force value. The controller is configured to obtain at least one of the parameter of the deformation amount of the micro force sensor 600 or the parameter of the applied force value, and determine the target parameter of the motor 12c according to the parameter of the deformation amount or the parameter of the force value. Among them, the target parameter includes but is not limited to the target speed of the motor, the target output torque, the target output current, or the target duty cycle, or the target conduction angle or lead angle, or at least one of the related parameters affecting the above target parameters. For convenience of reference, the micro force sensor 600 disposed at the position of the trigger 81c is set as the third micro force sensor 600d. In this embodiment, the micro force sensor is used to identify at least one of the parameter of the deformation amount or the parameter of the force value caused by the trigger stroke of the trigger 81c, and then send a corresponding control signal. The product has good compactness, and the product structure and component installation are simple.

[0188] It should be explained that the parameter of the deformation amount includes the value generated by the direct deformation of the stressed surface, such as the height change, the curvature change and other similar direct numerical changes. The parameter of the deformation amount also includes the numerical parameter obtained by performing relevant calculations based on the value generated by the direct deformation. For example, the area or volume change caused by the height change, or the parameter value obtained after one or two calculations of the numerical value. The parameter of the force value includes the value of the directly applied force on the stressed surface, or the parameter obtained by calculating the value of the force, such as the torque. Parameters generated by the force, such as speed change, etc.

[0189] As Figure 29aAs shown, the trigger 81c is fixed within the power tool 10 by the substrate 815d and partially protrudes from the housing of the power tool 10. In this embodiment, the substrate 815d is formed or connected within the grip portion 113d of the power tool, and the trigger 81c partially protrudes from the grip portion 113d. The trigger 81c is operated to displace on the grip portion 113d. The trigger 81c includes a contact portion 811d that contacts the user's finger and a linkage portion 812d for triggering a signal. The force-receiving surface 71k is provided on the circuit board or the substrate 815d. The force-receiving surface 71k is used to receive the force applied by the linkage portion 812d to the circuit board or the substrate 815d and output parameters of different deformation amounts when the force changes. The third micro force sensor 600d outputs a corresponding signal to the controller according to the parameter of the deformation amount of the force-receiving surface 71k, or the third micro force sensor 600d generates a parameter signal of the corresponding force value according to the parameter of the deformation amount of the force-receiving surface 71k and transmits the parameter signal of the force value to the controller 513d.

[0190] The linkage portion 812d includes a biasing member 813d. Optionally, the biasing member 813d is a helical spring. When the user's finger presses or applies a force to the contact portion 811d, the contact portion 811d connects or abuts against the helical spring to compress the helical spring and generate a force applied to the force-receiving surface 71k or the third micro force sensor 600d. Among them, the force applied by the helical spring to the force-receiving surface 71k or the third micro force sensor 600d is proportional to the force applied by the user's finger pressing or applying a force to the contact portion 811d. In some examples, the force applied by the helical spring to the force-receiving surface 71k or the third micro force sensor 600d may be linearly related to the force applied by the user's finger pressing or applying a force to the contact portion 811d, or may also be non-linearly related. The third micro force sensor 600d is provided on the substrate 815d. The force-receiving surface 71k is also provided at the abutting position of the helical spring and the substrate 815d. Exemplarily, the third micro force sensor 600d and the helical spring are respectively provided on two sides of the same position on the substrate 815d, that is to say, the third micro force sensor 600d and the helical spring are basically facing each other. When the user's finger presses or applies a force to the contact portion 811d to compress the helical spring, the pressure of the helical spring is at least partially applied to the substrate 815d to cause the force-receiving surface 71k to deform. The third micro force sensor 600d detects the parameter of the deformation amount of the substrate 815d, and the third micro force sensor 600d outputs a parameter signal of the deformation amount to the controller 513d according to the parameter of the deformation amount, or the micro force sensor 600 outputs a parameter signal of the force value to the controller 513d. The controller 513d determines the target parameter of the motor 12c according to the mapping relationship between the parameter of the deformation amount or the parameter signal of the force value and the target parameter of the motor 12c.

[0191] AsFigure 29b As shown, the linkage part 812d' includes a rigid member. Exemplarily, the linkage part 812d' includes a pin post 816d. The linkage part 812d' is formed or connected to the contact part 811d. When the user's finger presses on the contact part 811d or applies a force to the contact part 811d, the contact part 811d drives the linkage part 812d' to move or gives the linkage part 812d' a tendency to move, so as to generate a force applied to the force-receiving surface 71k or the third micro force sensor 600d. In this embodiment, the control circuit board is arranged on the movement path of the linkage part 812d' after being pressed by the user's finger. The third micro force sensor 600d is integrated on the control circuit board 817d. The force-receiving surface 71k is arranged at the contact position between the pin post 816d and the control circuit board 817d. After the user's finger presses on the contact part 811d or applies a force to the contact part 811d to make the linkage part 812d' move or gives the linkage part 812d' a tendency to move, the linkage part 812d' abuts against the force-receiving surface 71k after a preset displacement, causing the force-receiving surface 71k to deform. The third micro force sensor 600d outputs a corresponding signal to the controller 513d according to the parameter of the deformation amount of the force-receiving surface 71k, or the third micro force sensor 600d generates a parameter signal of a corresponding force value according to the parameter of the deformation amount of the force-receiving surface 71k, and sends the parameter signal of the force value to the controller 513d. The controller 513d determines the target parameter of the motor 12c according to the mapping relationship between at least one of the signals of the parameter of the deformation amount or the parameter of the force value and the target parameter of the motor 12c.

[0192] The power tool includes a plurality of triggers 81c, and at least one third micro force sensor 600d is correspondingly arranged for each trigger 81c. The linkage part can be a biasing member 813d or a rigid member. As Figure 29c shown, exemplarily, the power tool includes a first trigger 81d and a second trigger 81e. Among them, when the first trigger 81d is activated, the controller 513d controls the motor 12c to rotate forward. When the second trigger 81e is activated, the controller 513d controls the motor 12c to rotate in reverse. The first trigger 81d and the second trigger 81e respectively include a contact part and a linkage part. The user's finger presses the contact part of any one of the triggers, so that the linkage part applies a parameter of a force value to the base plate or the control circuit board, so as to generate a parameter of a deformation amount of the corresponding force-receiving surface. The third micro force sensor 600d detects the parameter of the deformation amount of the corresponding force-receiving surface 71k of the base plate or the control circuit board. The third micro force sensor 600d outputs a parameter signal of the deformation amount to the controller 513d according to the parameter of the deformation amount, or the third micro force sensor 600d outputs a parameter signal of the force value to the controller 513d. The controller 513d determines the forward rotation target parameter or the reverse rotation target parameter of the motor 12c according to the mapping relationship between at least one of the signals of the parameter of the deformation amount or the parameter of the force value and the target parameter of the motor 12c.

[0193] In the above embodiments, since the detection of the micro force sensor 600 is more accurate and the detection step is smaller, stepless speed regulation of the target rotation speed of the motor 12c can be achieved.

[0194] As a specific implementation manner of this embodiment, the micro force sensor can be applied to the accessories of power tools or the status confirmation of processed workpieces. The power tool 10 includes: a housing, a motor, and an output part. Among them, the motor is arranged in the housing, and the motor is configured to rotatably drive the output part coupled to the motor. The controller is arranged in the housing and is used to control the rotation of the motor.

[0195] The output part includes an accessory, and the accessory is used to process the workpiece. The power tool 10 further includes at least one micro force sensor 600, and the micro force sensor 600 is configured to detect at least one of the parameters of the deformation amount of at least one preset part of the accessory or the workpiece or the parameters of the applied force value. The controller is connected to at least one micro force sensor, and the controller is configured to obtain the detection data of at least one micro force sensor and determine the status of the accessory or the workpiece according to the detection data. Optionally, after determining the status of the accessory or the workpiece, the controller performs status prompting through the status indication part. Optionally, after determining the status of the accessory or the workpiece, the controller adjusts the operating status of the motor according to different statuses.

[0196] As Figures 30 to 3 shown in FIG. 1, the power tool is a table-type cutting saw 100e, which can be any one of known types, such as a freestanding table-type cutting saw or a portable table-type cutting saw. The table-type cutting saw 100e includes a workbench 15e, a motor 12e, and an output shaft 131e. The output shaft 131e is used to connect a rotating working accessory. In this embodiment, the motor 12e is a kind of electric motor, and hereinafter, the electric motor 12e will be used instead of the motor when it does not affect the substantial content of this application. The working accessory is a cutting element 16e. Exemplarily, the cutting element 16e is a saw blade. The electric motor 12e drives the output shaft 131e to rotate. In this embodiment, the output shaft 131e rotates around the second axis 102e, and the motor shaft of the electric motor 12e rotates around the first axis 101e. Among them, the positional relationship and transmission structure between the first axis 101e and the second axis 102e do not affect the substantial content of this application. In this embodiment, the first axis 101e does not coincide with the second axis 102e.

[0197] The motor 12e is disposed within the housing 11e. In this embodiment, the housing 11e is formed or connected to the workbench 15e. The output shaft 131e and the cutting element 16e are disposed outside the housing 11e. The workbench 15e is provided with a workbench surface 151e for supporting the workpiece 20e and enabling the workpiece 20e to slide thereon. The top surface 153e of the workbench surface contacts the workpiece 20e. The workbench surface 151e is formed with a saw blade through-hole 152e extending in the first direction. The saw blade passes through the saw blade through-hole 152e and extends. Optionally, the saw blade can project upward from the top surface through the saw blade through-hole 152e. The saw blade is driven by the motor 12e disposed below the workbench surface 151e to rotate to achieve the cutting function. The saw blade is used to cut the workpiece 20e, such as wood, which is pushed along the top surface and contacts the saw blade.

[0198] As Figure 33 shown, the bench-type cutting saw 100e further includes a drive module for driving the motor 12e and a controller 531e electrically connected to the drive module. The controller 531e outputs a control signal to the drive circuit to control the operation of the motor 12e. Optionally, the drive module distributes the voltage to the motor 12e in a certain logical relationship under the drive of the control signal output by the controller 531e, so that the motor 12e starts and generates continuous torque. In some embodiments, the drive module includes a plurality of electronic switches. Specifically, the electronic switch includes a field effect transistor or an insulated gate bipolar transistor, etc. In some embodiments, the drive module is a three-phase bridge circuit. The motor 12e in this embodiment is preferably set as a brushless motor 12e. Of course, other forms of motors 12e can also be used, which is not limited in this application. In some embodiments, the controller 531e employs a dedicated control chip (for example, MCU, micro control unit, Microcontroller Unit).

[0199] In some embodiments, the bench-type cutting saw 100e further includes a micro force sensor 600. The micro force sensor 600 is connected to the controller 531e and is used to detect at least one of the parameters of the deformation amount of a preset part of the workpiece 20e or the parameter of the applied force value and output a first signal to the controller 531e.

[0200] The force-receiving surface 71L is at least partially located on the workbench surface 151e. The micro force sensor 600 is used to detect the force applied by the workpiece 20e to the force-receiving surface 71L during the machining process to cause the deformation amount parameter of the force-receiving surface 71L, so as to obtain the unloading signal of the workpiece 20e. Figures 31a to 31cThe arrow direction in [description] is the moving direction of the workpiece 20e. The user moves the workpiece 20e along the arrow direction for cutting work. When the cutting operation is completed or the user removes the workpiece 20e from the workbench surface 151e, the micro force sensor 600 can sense at least one of the parameters of the deformation amount of the force-bearing surface 71L or the change in the parameters of the deformation amount, and then the controller 531e determines that the workpiece 20e is withdrawn and issues an unloading signal. In this embodiment, the unloading signal is related to the first signal output by the micro force sensor 600. In this embodiment, the unloading signal can be understood as the end of the machining of the workpiece 20e, or it can be understood as the withdrawal of the workpiece 20e from the working plane. Of course, those skilled in the art can also define the unloading signal in other ways, such as the workpiece 20e stopping for a period of time, etc.

[0201] In some embodiments, the force-bearing surface 71L is the area defined by the top surface 153e of the workbench surface. Optionally, there is no difference or no recognizable feature difference between the force-bearing surface 71L and other positions of the top surface 153e of the workbench surface. Optionally, the force-bearing surface 71L and other positions of the top surface 153e of the workbench surface use different materials or appearance indications. For example, the force-bearing surface 71L uses a locally transparent or semi-transparent light-transmitting material so that the user's different operating pressures can be feedback through the light. In some embodiments, the force-bearing surface 71L adopts different thicknesses or materials, or increases the surface treatment of the appearance. The force-bearing surface 71L is in the same plane as the top surface to not affect the movement of the workpiece 20e.

[0202] When the user operates the workpiece 20e and along Figures 31a to 31cWhen the arrow direction in [description] gradually moves towards the micro-force sensor 600, the workpiece 20e will cause different deformation amounts on the force-bearing surface 71L. The micro-force sensor 600 outputs a corresponding signal to the controller 531e according to the parameter of the deformation amount of the force-bearing surface 71L, or the micro-force sensor 600 generates a parameter signal of the corresponding force value according to the parameter of the deformation amount of the force-bearing surface 71L, and sends the parameter signal of the force value to the controller 531e. When the user completes the cutting operation, after the workpiece 20e is cut or the workpiece 20e is removed from the workbench surface 151e, the parameter of the deformation amount of the force-bearing surface 71L decreases to a preset threshold or the change amount of the parameter of the deformation amount of the force-bearing surface 71L reaches the preset threshold. At this time, the micro-force sensor 600 outputs a first signal. After receiving the first signal, the controller 531e determines the operating state of the workpiece 20e at this time. Optionally, after the controller 531e determines the operating state of the workpiece 20e, the controller 531e sends a signal to the status indication unit to prompt the user to perform the next operation. Optionally, after the controller 531e determines the operating state of the workpiece 20e, the controller 531e sends a signal to the motor 12e to automatically control the rotation speed or torque output of the motor 12e according to the operating state of the work. For example, when it is determined that the workpiece 20e has been unloaded, the controller 531e restricts the output of the motor 12e and decelerates or stops the motor 12e.

[0203] See Figure 31a As shown, the saw blade forms a cutting plane (not shown in the figure). In some embodiments, at least part of the force-bearing surface 71L or the micro-force sensor 600 is arranged at the front end of the saw blade. Optionally, the workpiece 20e enters the area of the force-bearing surface 71L or the micro-force sensor 600, and after continuing to advance, it contacts the saw blade and starts cutting. See Figures 31b to 31c As shown, in some embodiments, the projection of at least part of the micro-force sensor 600 on the plane where the cutting plane is located is located within the projection of the saw blade on the plane where the cutting plane is located. Optionally, the projection of the micro-force sensor 600 on the workbench surface 151e is located between point A and point B in the front-rear direction. Wherein, point A is the rear end point of the projection of the saw blade on the workbench surface 151e, and point B is the front end point of the projection of the saw blade on the workbench surface 151e. Optionally, point C is the midpoint of the projection of the saw blade on the workbench surface 151e. The projection of the micro-force sensor 600 on the workbench surface 151e, and the midpoint of the micro-force sensor 600 is within the area 3 mm before and after point C in the front-rear direction. Optionally, when multiple micro-force sensors 600 are arranged, the projections of at least two micro-force sensors 600 on the workbench surface 151e are located on both sides of the projection of the plane where the cutting plane is located in the left-right direction. Optionally, the projections of at least two micro-force sensors 600 on the workbench surface 151e are symmetrically arranged with respect to the projection of the plane where the cutting plane is located.

[0204] In some embodiments, the bench - type cutting saw 100e further includes an operation switch 18e disposed on the workbench 15e, and the operation switch 18e is operable by the user. Optionally, the operation switch 18e includes a first switch 181e and a second switch 182e. Among them, the first switch 181e is the main control switch of the bench - type cutting saw 100e, and the second switch 182e is the motor 12e switch of the bench - type cutting saw 100e. The user can make the bench - type cutting saw 100e be in different working modes by operating the first switch 181e. Specifically, when the user operates the first switch 181e to the "1" gear, the bench - type cutting saw 100e is in the first working mode, that is, the intelligent mode. When the user operates the first switch 181e to the "2" gear, the bench - type cutting saw 100e is in the second working mode, that is, the normal mode. Of course, the setting of the number of the above - mentioned working modes and the specific corresponding relationship are not limitations to this application.

[0205] The second switch 182e is the motor 12e switch of the bench - type cutting saw 100e. When the first switch 181e is in a selected gear and the second switch 182e is turned on simultaneously, the bench - type cutting saw 100e runs in a fixed mode. When the second switch 182e is turned off, the motor 12e stops.

[0206] Next, the control methods of the bench - type cutting saw 100e in different working modes will be introduced in detail.

[0207] After the user turns on the second switch 182e, at this time the motor 12e does not work, and of course the saw blade does not rotate. When the user operates the first switch 181e to the "1" gear, the bench - type cutting saw 100e determines that it is in the intelligent mode, and the motor 12e starts to drive the saw blade to rotate for the user to perform the cutting operation. The controller 531e senses the workpiece 20e through the micro - force sensor 600. When the micro - force sensor 600 senses that the user has completed the cutting work on the workpiece 20e, it sends a first signal to the controller 531e, and the controller 531e sends an unloading control signal to the motor 12e, and the motor 12e is turned off to stop the saw blade from continuing to rotate. When the bench - type cutting saw 100e is still in the intelligent mode and the user needs to start the motor 12e again for the cutting operation, the second switch 182e needs to be started again to control the motor 12e to start. Of course, it should be noted that when the bench - type cutting saw 100e is in the intelligent mode, the user can also turn off the second switch 182e to achieve shutdown.

[0208] When the user operates the first switch 181e to the "2" gear, the bench - type cutting saw 100e is in the normal mode. At this time, the motor 12e starts normally to drive the saw blade to rotate, and at this time the user can directly perform the cutting work. It should be noted that when the first switch 181e is in the "2" gear, the user controls the motor 12e to stop through the second switch 182e.

[0209] The following will combine Figure 32 with Figure 33 to illustrate the process of the control method of the bench-type cutting saw 100e in the intelligent mode. The method includes the following steps: S11: Determine whether the second switch is turned on. If so, execute step S12; if not, execute step S17.

[0210] S12: Determine the gear position of the first switch 181e. If it is "1", execute step S13; if it is "2", execute step S15.

[0211] S13: The controller 531e controls the motor 12e to start.

[0212] The saw blade rotates for the user to perform a cutting operation.

[0213] S14; The cutting of the wood is completed; execute step S11.

[0214] S15; The controller 531e controls the motor 12e to start.

[0215] The saw blade rotates for the user to perform a cutting operation.

[0216] S16; The cutting of the wood is completed.

[0217] S17; The controller 531e controls the motor 12e to stop, and the saw blade stops rotating.

[0218] After the user sets the bench-type tool in the intelligent mode through the first switch 181e, the user needs to continue to turn on the second switch 182e, and the motor 12e can be started to drive the saw blade to rotate to meet the cutting needs of the user.

[0219] Optionally, after the user finishes cutting, when the micro force sensor 600 senses that the user has completed the cutting work on the workpiece 20e, it sends a first signal to the controller 531e. The controller 531e sends an unloading control signal to the motor 12e, and the controller 531e controls the motor 12e to turn off after a preset time. Of course, those skilled in the art can design the preset time according to the actual situation. In this embodiment, the preset time is set to be less than or equal to 1 second. In some embodiments, the preset time is set to be less than or equal to 500 ms. In some embodiments, the preset time is set to be less than or equal to 300 ms. In some embodiments, the preset time is set to be less than or equal to 200 ms. When the user needs to perform cutting work again, the second switch 182e needs to be turned on again.

[0220] The first switch 181e and the second switch 182e are arranged on the side of the workbench 15e. In this way, the user can operate the switch 18e more conveniently and can also avoid the workpiece 20e accidentally touching the switch, thereby affecting the processing.

[0221] In this embodiment, when the bench-type cutting saw 100e is set to the intelligent mode, it has the function of automatic shutdown. Specifically, when the bench-type tool is in the intelligent mode, after a preset time when the controller 531e obtains the unloading signal of the workpiece 20e, it adjusts the rotational speed of the motor 12e to the first rotational speed. In some embodiments, the unloading signal is related to the first signal output by the sensing device or the operating parameters of the motor 12e. Specifically, the operating parameters of the motor 12e include, but are not limited to, the operating current or rotational speed of the motor 12e. In some embodiments, the first rotational speed is 0. In other embodiments, the first rotational speed is a relatively low rotational speed greater than 0.

[0222] In some alternative embodiments, as Figures 33 to 35 shown, by way of example, the power tool is a jigsaw 100f. The jigsaw 100f includes: a housing 11f, a motor 12f, a transmission assembly 14f, an output member 13f, a saw blade 18f, and a base plate assembly 15f. The housing 11f includes: a handle portion 113f and a receiving portion 111f. The handle portion 113f is for a user to hold to operate the jigsaw 100f. An accommodation cavity for accommodating at least part of the motor 12f is formed inside the receiving portion 111f. The motor 12f is disposed in the accommodation cavity formed by the receiving portion 111f, and the motor 12f is used to drive the output member 13f to move. The transmission assembly 14f is used to transmit the power output by the motor 12f to the output member 13f to drive the output member 13f to reciprocate. At least part of the transmission assembly 14f is disposed in the accommodation cavity formed by the receiving portion 111f. The output member 13f is for mounting the saw blade 18f, and at least part of the output member 13f extends out of the housing 11f. The saw blade 18f is disposed outside the housing 11f, and a sawtooth is formed on one side of the saw blade 18f. The workpiece is cut by the reciprocating movement of the saw blade 18f. The base plate assembly 15f is disposed outside the housing 11f. The base plate assembly 15f and the housing 11f are rotatably connected about a first axis, so as to achieve bevel cutting. The output member 13f is provided with a clamping device 16f for clamping the saw blade 18f, and the saw blade 18f extends out of the housing 11f in a first direction.

[0223] It further includes a controller 17f configured to determine the working state of the saw blade 18f. Among them, the clamping device 16f includes a receiving portion 161f for receiving the saw blade 18f and a micro force sensor 600. The micro force sensor 600 detects at least one of the parameter of the deformation amount at a preset position of the saw blade 18f or the parameter of the applied force value. The controller 17f determines that the saw blade 18f is installed in place based on at least one of the parameter signal of the deformation amount or the parameter signal of the force value output by the micro force sensor 600. Optionally, the micro force sensor 600 detects at least one of the parameter of the deformation amount at a preset position of the saw blade 18f or the parameter of the applied force value. When the controller 17f determines that the operating direction of the saw blade 18f does not meet the expectation based on at least one of the parameter signal of the deformation amount or the parameter signal of the force value output by the micro force sensor 600, the controller 17f issues an instruction that the clamping device 16f needs to be adjusted or the controller 17f automatically adjusts the clamping state of the clamping device 16f.

[0224] Optionally, the micro force sensor 600 is disposed in the receiving portion 161f, wherein the force receiving surfaces 71m are respectively disposed on both sides in the clamping direction of the saw blade 18f. Optionally, the force receiving surfaces 71m are respectively disposed on the left and right sides of the saw blade 18f. The micro force sensor 600 detects the parameter of the deformation amount generated due to the saw blade 18f applying forces to the left and right sides on the force receiving surfaces 71m. The micro force sensor 600 outputs a corresponding signal to the controller 17f according to the parameter of the deformation amount of the force receiving surfaces 71m, or the micro force sensor 600 generates a corresponding parameter signal of the force value according to the parameter of the deformation amount of the force receiving surfaces 71m and sends the parameter signal of the force value to the controller 17f. When at least one of the parameter of the deformation amount or the parameter of the force value of the two force receiving surfaces 71m meets the preset condition, it is determined that the saw blade 18f is installed in place. Optionally, when at least one of the parameter of the deformation amount or the parameter of the force value of the two force receiving surfaces 71m is substantially the same, it is determined that the saw blade 18f is installed in place.

[0225] In some alternative embodiments, such as Figure 33 and Figure 36As shown, by way of example, the power tool is a reciprocating saw 100g. The reciprocating saw 100g includes an output member 13g, and the output member 13g is provided with a clamping device 16g for clamping a saw blade (not shown), and the saw blade (not shown) extends out of the housing along a first direction. The clamping device 16g includes a receiving portion 161g for receiving the saw blade (not shown) and a micro force sensor 600. The micro force sensor 600 detects at least one of the parameter of the deformation amount of the saw blade (not shown) at a preset position or the parameter of the applied force value. When the controller 17g determines that the cutting task of the reciprocating saw 100g is completed or the reciprocating saw cuts into a non-cutting workpiece according to at least one of the parameter signal of the deformation amount or the parameter signal of the force value output by the micro force sensor 600, the output of the motor 12g is controlled. Optionally, the micro force sensor 600 is disposed within the receiving portion 161g. The micro force sensor 600 detects the parameter of the deformation amount generated by the force of the workpiece on the force receiving surface 71n due to the saw blade (not shown), and the micro force sensor 600 outputs a corresponding signal to the controller 17g according to the parameter of the deformation amount of the force receiving surface 71n, or the micro force sensor 600 generates a parameter signal of a corresponding force value according to the parameter of the deformation amount of the force receiving surface 71n, and transmits the parameter signal of the force value to the controller 17g. When at least one of the parameter of the deformation amount or the parameter of the force value of the force receiving surface 71n meets a preset condition, it is determined that the cutting task of the reciprocating saw 100g is completed. Optionally, when at least one of the parameter of the deformation amount or the parameter of the force value of the force receiving surface 71n decreases to a preset value or suddenly decreases to a preset value, it is determined that the cutting task of the reciprocating saw 100g is completed, and the controller 17g restricts the output of the motor 12g or controls the motor 12g to stop. When at least one of the parameter of the deformation amount or the parameter of the force value of the force receiving surface 71n increases to a preset value or suddenly increases to a preset value, it is determined that the reciprocating saw 100g cuts into a non-cutting workpiece such as a metal plate, etc., and the controller 17g restricts the output of the motor 12g or controls the motor 12g to stop to protect the saw blade (not shown) and the motor 12g.

[0226] In some alternative embodiments, by way of example, as Figure 37 shown, the power tool is a fastener driver 100h, for example, a drywall screw driver or a nail gun. The output mechanism 13h is used to drive the fastener into the workpiece. Optionally, the output mechanism of the drywall screw driver includes an output shaft, and the output shaft drives the fastener into the workpiece through a clamping accessory or an impact accessory. Optionally, the nail gun includes a firing portion 131h, and the firing portion impacts the fastening nail to make the fastening nail enter the workpiece.

[0227] The fastener driver 100h includes a trigger mechanism. When the trigger part 161h of the trigger mechanism contacts the workpiece, it will move or tend to move, and thus will deform within a preset stroke. The trigger mechanism 16h also includes a micro force sensor 600. The micro force sensor 600 detects at least one of the parameter of the deformation amount of the trigger part 161h at a preset position or the parameter of the applied force value. When the controller determines that the trigger part 161h of the fastener driver 100h has a preset contact or relationship with the workpiece according to at least one of the parameter signal of the deformation amount or the parameter signal of the force value output by the micro force sensor 600, it controls the output of the motor. Optionally, the force-receiving surface 71p is provided on the surface of the trigger part 161h or between the trigger part 161h and the component that deforms the trigger part 161h. The micro force sensor 600 detects the parameter of the deformation amount generated by the force-receiving surface 71p due to the force generated when the trigger part 161h has a preset contact or relationship with the workpiece. The micro force sensor 600 outputs a corresponding signal to the controller according to the parameter of the deformation amount of the force-receiving surface 71p, or the micro force sensor 600 generates a corresponding parameter signal of the force value according to the parameter of the deformation amount of the force-receiving surface 71p and sends the parameter signal of the force value to the controller. When at least one of the parameter of the deformation amount or the parameter of the force value of the force-receiving surface 71p meets the preset condition, it is determined that the fastener driver 100h can be started. Furthermore, it is realized that there is no need for an additional trigger switch or manual control by the user to start. When the trigger part 161h abuts against the workpiece and applies a certain force, the product starts automatically. Among them, the trigger part 161h can be a working accessory such as a screwdriver bit. The firing part also belongs to a kind of working accessory.

[0228] In some alternative embodiments, the micro-force sensor detects at least one of the parameter of the deformation amount at a preset position of the attachment or the parameter of the applied force value. The controller determines that the output torque of the working attachment reaches a preset condition according to at least one of the parameter signal of the deformation amount or the parameter signal of the force value output by the micro-force sensor, and controls the output of the motor. Optionally, the force-receiving surface is provided on the surface of the attachment or between the attachment and the clamping device. The micro-force sensor detects the parameter of the deformation amount generated by the force generated on the force-receiving surface due to the torque transmission between the attachment and the workpiece, and the micro-force sensor outputs a corresponding signal to the controller according to the parameter of the deformation amount of the force-receiving surface, or the micro-force sensor generates a corresponding parameter signal of the force value according to the parameter of the deformation amount of the force-receiving surface, and sends the parameter signal of the force value to the controller. When at least one of the parameter of the deformation amount or the parameter of the force value of the force-receiving surface meets the preset condition, it is determined that the output torque does not match the torque required by the workpiece, and then the output of the motor is adjusted. For example, when at least one of the parameter of the deformation amount or the parameter of the force value of the force-receiving surface exceeds the threshold, it is determined that the output torque is too small, and then the motor is controlled to increase the torque output, such as increasing the output speed or increasing the output torque. Optionally, when at least one of the parameter of the deformation amount or the parameter of the force value of the force-receiving surface exceeds the threshold, it is determined that the working attachment is separated from the fastener, and then the motor is controlled to reduce the torque output, such as reducing the output speed or reducing the output torque.

[0229] In some alternative embodiments, using the detected value of the micro-force sensor, the controller controls the motor to start or stop automatically, thereby replacing the function of the mechanical clutch. In some embodiments, using the detected value of the micro-force sensor can reflect the aging or wear of key components of the machine, such as gears, motors or impact blocks, etc. When the controller determines that aging or wear occurs, a prompt signal is sent through the status indication part. In some alternative embodiments, the detected value of the micro-force sensor is used to detect the change state of the material, such as monitoring the hardening state after concrete pouring.

[0230] As a specific implementation manner of this embodiment, as Figure 4 and Figures 38 to 42 shown, taking the outdoor walking device 400 as an example for the power tool 10, the walking assembly 42 includes walking wheels and a drive motor for driving the walking wheels to rotate. In some embodiments, the walking assembly 42 includes components such as a walking track for driving the outdoor walking device 400 to move forward. In this embodiment, the walking wheels include a rear walking wheel 421 and a front walking wheel 422. Among them, as Figure 38As shown, the rear traveling wheels 421 include a left rear traveling wheel 421L and a right rear traveling wheel 421R. The front traveling wheels 422 include a left front traveling wheel 422L and a right front traveling wheel 422R. The drive motor drives the rear traveling wheels 421 or the front traveling wheels 422 to rotate, so as to realize the traveling function of the outdoor traveling device 400. Optionally, the number of drive motors can be one, two, three or four. Exemplarily, the traveling assembly 42 includes a first drive wheel and a second drive wheel that provide driving force. In this embodiment, the first drive wheel is the right rear traveling wheel 421R, and the second drive wheel is the left rear traveling wheel 421L. The drive motor includes a first drive motor 431 that provides driving force for the right rear traveling wheel 421R, and a second drive motor 432 that provides driving force for the left rear traveling wheel 421L. For the convenience of reference, in the subsequent description, the right rear traveling wheel is referred to as the first drive wheel 411R, and the left rear traveling wheel is referred to as the second drive wheel 411L. The traveling assembly 42 uses an independent drive method to provide driving force to the first drive wheel 411R and the second drive wheel 411L respectively.

[0231] As Figure 4 and Figures 39 to 41 shown, the outdoor traveling device 400 further includes a control device 44 that is operated by a user to at least control the steering of the outdoor traveling device. As Figures 39 to 40 shown, the control device 44 includes a steering wheel 441, and the steering wheel 441 controls the direction pointed by the traveling wheels. As Figure 4 and Figure 41 shown, the control device 44 includes a first operating lever 442 and a second operating lever 443. The first operating lever 442 and the second operating lever 443 are for the user to operate and indicate the user's desired operation to control the forward, backward and turning of the ride-on mower 100. Exemplarily, the first operating lever 442 can be grasped by the user's right hand and can also be regarded as the right operating lever, and the second operating lever 443 can be grasped by the user's left hand and can also be regarded as the left operating lever. The ride-on mower 100 of the present application is provided with left and right groups of operating levers, and the steering and straight-line speed of the outdoor traveling device 100 are controlled according to the tilting angles of the left and right groups of operating levers. The first operating lever 442 and the second operating lever 443 are respectively operably coupled to the first drive wheel 421R and the second drive wheel 421L. Exemplarily, the first operating lever 442 is coupled to the first drive motor 431, and the second operating lever 443 is coupled to the second drive motor 432. The first operating lever 442 and the second operating lever 443 respectively independently control the movement of the first drive wheel 421R and the second drive wheel 421L. Optionally, the first operating lever 442 and the second operating lever 443 respectively independently input drive demands to the first drive motor 431 and the second drive motor 432.

[0232] The outdoor walking device 400 further includes a controller 472 for controlling the rotation of the drive motor. The controller 472 is disposed on a control circuit board 471, and the control circuit board 471 is connected to the vehicle frame 41. The control circuit board 471 includes: a PCB circuit board (Printed Circuit Board) and an FPC circuit board (Flexible Printed Circuit board). The controller 472 employs a dedicated control chip, for example, a single-chip microcomputer, a microcontroller unit MCU (Microcontroller Unit). It should be noted that the control chip can be integrated within the controller 472, or can also be disposed independently of the controller 472. Regarding the structural relationship between the drive chip and the controller 472, this embodiment does not limit it.

[0233] The outdoor walking device 400 includes a micro force sensor 600 for detecting at least one of the parameter of the deformation amount of a preset part of the control device 44 or the parameter of the force value applied to the preset part of the control device 44. It needs to be explained that the parameter of the deformation amount includes the value directly generated by the deformation of the force-bearing surface, such as height change, curvature change, and other similar direct numerical changes. The parameter of the deformation amount also includes the numerical parameter obtained by performing relevant calculations based on the value directly generated by the deformation, for example, the area or volume change generated due to the height change, or the parameter value obtained after performing one or two calculations on the value. The parameter of the force value includes the value of the force directly applied to the force-bearing surface, or the parameter obtained by calculating the value of the force, such as torque. Parameters are generated by the force, such as speed change, etc.

[0234] The controller 472 is connected to the micro force sensor 600. Optionally, the controller 472 is connected to the micro force sensor 600 through a digital signal. Optionally, the controller 472 is connected to the micro force sensor 600 through an analog signal. Optionally, the controller 472 is connected to the micro force sensor 600 through a wireless signal. The controller 472 is the main controller 472 of the power tool. Optionally, the controller 472 is a separate controller 472 controlled by the micro force sensor 600. The control circuit board 471 can be one piece. Optionally, the control circuit board 471 is two or more pieces.

[0235] The controller 472 is configured to: receive the detection values of the micro force sensor 600, and determine the operation intention of the user for the control device 44 based on the detection values of the micro force sensor 600. In this embodiment, the detection values include at least one of the parameters of the deformation amount of the force receiving surface of the preset part of the control device 44, the parameter of the force value, the parameter of the change rate of the deformation amount, or the parameter of the change rate of the force value. Among them, the operation intention at least includes: increasing or maintaining or decreasing the form speed, changing the driving direction, parking, and setting the device parameters for changing the non-driving state. Among them, the device parameter setting for changing the non-driving state includes lighting setting, working part (such as mowing, snow sweeping, cleaning attachment) state setting, and network state setting.

[0236] In some embodiments, the controller 472 controls the output states of the drive motors 431 and 432 based on the operation intention, such as increasing or decreasing the output rotation speeds of the drive motors 431 and 432, restricting the output rotation speeds of the drive motors 431 and 432, or the output torque. In some embodiments, the controller 472 generates an alarm signal based on the operation intention and provides the alarm to the user. For example, when it is detected that the user's hands leave the control device 44, an alarm signal is generated and provided to the user. In some embodiments, while generating the alarm signal, restricting the output rotation speeds of the drive motors 431 and 432 includes gradually decelerating or restricting the maximum rotation speed.

[0237] As Figure 40 shown, in some embodiments, the control device 44 is set as a steering wheel 441. The steering wheel 441 includes a left spoke 4411 and a right spoke 4412. The left spoke 4411 is the part held by the left hand during straight-line travel, and the right spoke 4412 is the part held by the right hand during straight-line travel. Among them, the micro force sensor 600 is at least arranged on the left spoke 4411 of the steering wheel 441. The housing of the left spoke 4411 of the steering wheel 441 defines a force receiving surface 71r. The force receiving surface 71r is used to receive an external force and generate different deformations when the external force changes. The micro force sensor 600 is arranged inside the left spoke 4411 of the steering wheel 441. Exemplarily, the micro force sensor 600 is arranged on the back or side of the force receiving surface 71r or on the outer periphery of the force receiving surface 71r. Exemplarily, as Figure 40As shown, the force-receiving surface 71r is provided on the housing at a preset holding position of the driver. Optionally, the force-receiving surface 71r can also be provided at other positions on the left portion 4411 of the steering wheel 441. In some embodiments, the micro force sensor 600 is provided at least on the right portion 4412 of the steering wheel 441. The housing of the right portion 4412 of the steering wheel 441 defines a force-receiving surface 71r, which is used to receive an external force and generate different deformations when the external force changes. The micro force sensor 600 is provided inside the right portion 4412 of the steering wheel 441. Exemplarily, the micro force sensor 600 is provided on the back or side of the force-receiving surface 71r or on the outer periphery of the force-receiving surface 71r. Exemplarily, as Figure 40 As shown, the force-receiving surface 71r is provided on the housing at a preset holding position of the driver. Optionally, the force-receiving surface 71r can also be provided at other positions on the right portion 4412 of the steering wheel 441. In some embodiments, the micro force sensors 600 are respectively provided on the left portion 4411 and the right portion 4412 of the steering wheel 441. The left portion 4411 and the right portion 4412 of the steering wheel 441 respectively include a force-receiving surface 71r, which is used to receive an external force and generate different deformations when the external force changes. The micro force sensors 600 are provided inside the left portion 4411 and the right portion 4412 of the steering wheel 441. Further, by detecting whether the user holds the left portion 4411 or the right portion 4412 of the steering wheel 441, it can be determined whether the driver is in a two-handed holding state, a single-handed holding state or a non-holding state, making the detection data more accurate.

[0238] In this embodiment, the micro force sensor 600 is provided on the back of the force-receiving surface 71r. Wherein, the force-receiving surface 71r is configured as the area defined by the housing of the left portion 4411 and / or the right portion 4412 of the steering wheel 441. In some embodiments, the micro force sensor 600 is directly or indirectly connected to the back of the force-receiving surface 71r. In some embodiments, the micro force sensor 600 is provided on the back of the force-receiving surface 71r but does not contact the back of the force-receiving surface 71r, that is to say, the micro force sensor 600 is suspended on the back of the force-receiving surface 71r. For example, the micro force sensor 600 is provided on the back of the force-receiving surface 71r but is connected and fixed to the front or side of the force-receiving surface 71r through a connecting member or a fastening member.

[0239] The force-bearing surface 71r is configured as an area defined by the left-side 4411 and / or right-side 4412 shell of the steering wheel 441, ensuring that the steering wheel 441 is an integrated structure. Optionally, the force-bearing surface 71r is made of the same material and appearance as the shell of the steering wheel 441. The force-bearing surface 71r is indicated by a mark on the steering wheel 441. For example, the force-bearing surface 71r is indicated by a screen printing on the steering wheel 441, or the force-bearing surface 71r is indicated by a back-adhesive label or by etching, leather grain or pattern. In some embodiments, the force-bearing surface 71r is indicated by a material or appearance different from that of the shell of the steering wheel 441, for example, the force-bearing surface 71r is made of a partially transparent or translucent light-transmitting material so that different operating pressures of the user can be fed back through the light. In some embodiments, the force-bearing surface 71r uses different thicknesses or materials to meet the detection requirements of the micro force sensor 600.

[0240] In some embodiments, the use of the micro force sensor 600 can also replace any function switch on the steering wheel 441, so that the user only needs to touch a specific force surface 71r area to start or shut down the corresponding function. For example, the motor is powered on or off, and the outdoor driving equipment enters a standby state or shuts down. The controller 472 is configured to start or stop the motor 12 according to the output of any micro force sensor 600. The elimination of the physical switch or other mechanical switch can maintain the sealing of the entire machine casing and improve the waterproof and dustproof performance of the machine. When the micro force sensor 600 replaces the start switch, since the micro force sensor 600 is small in size and can detect a smaller deformation, it can be used without special treatment of the shell of the steering wheel 441.

[0241] In some embodiments, the controller 472 is configured to start or shut down the lighting component in the power tool 10 according to the output of any one of the micro-force sensors 600. In some embodiments, the micro-force sensor 600 can also replace the mode switch, and at least limit the maximum speed of the outdoor driving equipment by switching different working modes. Multiple micro-force sensors 600 can be set at different positions so that the same or different functions can be controlled at different positions of the steering wheel 441. For example, micro-force sensors 600 are set on both the left side 4411 and the right side 4412 of the steering wheel 441 to control the switching of the working mode, or micro-force sensors 600 are set only on the left side 4411 to control the lighting settings of the outdoor walking equipment.

[0242] Exemplarily, a plurality of micro force sensors 600 are respectively disposed at two or more positions of the steering wheel 441. By applying forces to different micro force sensors 600, the micro force sensors 600 send corresponding signals to the controller 472, so that the controller 472 controls motors (such as drive motors 431, 432) or corresponding response components to perform corresponding actions. Exemplarily, the plurality of micro force sensors 600 are linearly arranged, so that the plurality of micro force sensors 600 form a force detection signal with linearly varying output by the user's sliding operation. By the user sliding to different positions on the micro force sensors 600, different corresponding signals are output to the controller 472, so that the controller 472 controls motors (such as drive motors 431, 432) or corresponding response components to perform corresponding actions.

[0243] As Figure 41 shown, in some embodiments, the control device 44 is provided with a first operating lever 442 and a second operating lever 443. At least one of the first operating lever 442 and the second operating lever 443 includes a force-receiving surface 71s for receiving an external force and generating different deformations when the external force changes. The micro force sensor 600 is disposed on the back or side of the force-receiving surface 71s or on the outer periphery of the force-receiving surface 71s.

[0244] In some embodiments, taking the first operating lever 442 as an example, the first operating lever 442 includes a gripping portion 4421 configured to support the user's palm. The first operating lever 442 further includes a steering lever 4422 configured to be movably connected to the vehicle frame 4111 or the traveling mechanism 40. In some embodiments, the steering lever 4422 may be a metal tube (or a tube made of other rigid materials), which includes at least one portion extending substantially vertically (when installed in the middle position) and another portion extending substantially horizontally. In some embodiments, the substantially horizontally extending portion of the steering lever 4422 may be considered or actually include a structure as the gripping portion 4421 or for connecting the gripping portion 4421. In some embodiments, the gripping portion 4421 may be made of different materials (such as softer materials) that are more comfortable for the operator to grip. In some cases, the gripping portion 4421 may include textures or other features to enhance or improve the operator's gripping feel.

[0245] The first operating lever 442 and the second operating lever 443 respectively include a grip portion 4421. The force-receiving surface 71s is at least partially disposed on the grip portion 4421, and the housing of the grip portion 4421 defines the force-receiving surface 71s. The micro force sensor 600 is disposed inside at least one of the first operating lever 442 and the second operating lever 443 to detect the deformation amount or the force value of the force-receiving surface. Exemplarily, the micro force sensor 600 is disposed inside the grip portion 4421. The force-receiving surface 71s of the grip portion 4421 is used to receive an external force and generate different deformations when the external force changes. Optionally, the micro force sensor 600 is disposed on the back surface or the side surface of the force-receiving surface 71s or on the outer periphery of the force-receiving surface 71r. In this embodiment, the micro force sensor 600 is disposed on the back surface of the force-receiving surface 71s. Wherein, the force-receiving surface 71s is configured as the area defined by the housing of the grip portion of the first operating lever 442 and / or the second operating lever 443. In some embodiments, the micro force sensor 600 is directly or indirectly connected to the back surface of the force-receiving surface 71s. In some embodiments, the micro force sensor 600 is disposed on the back surface of the force-receiving surface 71s but does not contact the back surface of the force-receiving surface 71s, that is to say, the micro force sensor 600 is suspended on the back surface of the force-receiving surface 71s. For example, the micro force sensor 600 is disposed on the back surface of the force-receiving surface 71s but is connected and fixed to the front surface or the side surface of the force-receiving surface 71s through a connecting member or a fastening member.

[0246] The force-receiving surface 71s is configured as the area defined by the housing of the grip portion of the first operating lever 442 and / or the second operating lever 443, ensuring that the grip portion 4421 is an integral structure. Optionally, the force-receiving surface 71s has the same material and appearance effect as the housing of the grip portion 4421. The force-receiving surface 71s is indicated by a marking on the grip portion 4421. For example, the force-receiving surface 71s is indicated by silk screen printing on the grip portion 4421, or the force-receiving surface 71s is indicated by a self-adhesive label, or is indicated by etching, leather texture or pattern. In some embodiments, the force-receiving surface 71s uses a different material or appearance indication from the housing of the grip portion 4421. For example, the force-receiving surface 71s uses a partially transparent or semi-transparent light-transmitting material so that different operating pressures of the user are feedback through the light. In some embodiments, the force-receiving surface 71s uses different thicknesses or materials to adapt to the detection requirements of the micro force sensor 600.

[0247] Exemplarily, the micro force sensor 600 is configured to determine the user's hand-holding situation according to the change in the external force received by the force-receiving surface 71s. In some embodiments, the micro force sensor 600 can also be used to replace the switch with any one function on the first operating lever 442 and the second operating lever 443, so that the user can start or close the corresponding function only by touching a specific area. Canceling the physical switch or other mechanical switches can maintain the sealing performance of the whole machine shell and improve the waterproof and dustproof performance of the machine, which is the same as the function in the steering wheel 441 and will not be elaborated herein.

[0248] As Figure 4 and Figure 39 and Figure 42 As shown, the outdoor walking device 400 further includes a support mechanism 49. The support mechanism 49 supports the user at least during the travel of the outdoor walking device 400, and the support mechanism 49 is mounted on the vehicle frame 41. Optionally, the support mechanism 49 includes a seat 491. The seat 491 is mounted to the vehicle frame 41 for the user to sit on. In other alternative embodiments, the support mechanism 49 includes a platform for the user to stand on for the user to stand.

[0249] In this embodiment, the micro force sensor 600 is used to detect at least one of the parameters of the deformation amount of a preset part or the parameter of the applied force value in at least one of the walking assembly 42, the support mechanism 49, and the vehicle frame 41. The controller 472 is configured to: receive the detection value of the micro force sensor 600 and trigger a corresponding control signal of the controller 472 based on the detection value of the micro force sensor 600.

[0250] Exemplarily, taking the support mechanism 49 including the seat 491 as an example, based on the detection value of the micro force sensor 600, the controller 472 determines the user's presence situation and triggers a control signal corresponding to the user's presence situation. Based on the detection value of the micro force sensor 600, the controller 472 determines the weight of the user supported by the support mechanism 49 or the relative position of the user relative to the support mechanism 49. As Figure 39 shown, optionally, the micro force sensor 600 is disposed in the seat 491, and the force-receiving surface 71t in the preset part includes the area defined by the surface of the seat 491. As Figure 42As shown, optionally, the seat 491 is connected to the seat mounting portion 411 of the vehicle frame 41. The micro force sensor 600 is disposed within the vehicle frame 41. The force-receiving surface 71t in the preset portion includes the seat mounting portion 411. The micro force sensor 600 can accurately and real-time detect the weight information of the user. A threshold value of the user's weight is set within the controller 472, which can flexibly adapt to the weights of different drivers. For light-weight users and heavy-weight users, the detection of the user's presence can be accurately performed. Exemplarily, the user's presence includes the user leaving, and the modes corresponding to different weight users. The vibration reduction and driving torque output corresponding to different weight users are at least partially different.

[0251] In some embodiments, as Figure 38 and Figure 42 shown, a connection plate 412 is provided on the vehicle frame 41. The front traveling wheels 422 and the rear traveling wheels 421 are respectively connected to the corresponding connection plates 412. The micro force sensor 600 is disposed on the connection plate 412. Based on the detection value of the micro force sensor 600, the controller 472 determines the attitude information of the outdoor walking device and triggers a control signal corresponding to the attitude information. Exemplarily, the walking assembly 42 includes at least four traveling wheels. The connection plate 412 corresponding to the traveling wheels includes four connection positions 4121. The preset position is provided on the connection plate 412. Based on the detection value of the micro force sensor 600, the pressure difference between the respective connection positions 4121 is determined. The controller 472 determines the attitude information of the outdoor walking device based on the pressure difference. The attitude information includes the inclination angle in the horizontal direction and the change of the inclination angle in the horizontal direction.

[0252] Exemplarily, the force-receiving surface 71u in the preset position is provided on the connection plate 412. At least one micro force sensor 600 is provided at each corresponding connection position 4121 of the plurality of traveling wheels. When the attitude of the outdoor walking device is substantially parallel to the horizontal direction, the detection values of the micro force sensors 600 at each connection position 4121 are substantially the same. When the attitude of the outdoor walking device is inclined with respect to the horizontal direction, a difference appears in the detection values between the respective connection positions 4121, that is, the pressure difference between the respective connection positions 4121. According to the pressure difference between the respective connection positions 4121, the controller 472 determines the attitude information of the outdoor walking device according to a preset calculation method or by using a look-up table method. The controller 472 controls the output states of the drive motors 431 and 432 based on the attitude information. For example, when the inclination angle is too large, one-sided deceleration or parking is performed. For another example, when the inclination angle is too large, the vehicle body stability system is automatically adjusted. In some embodiments, the controller 472 generates an alarm signal based on the attitude information and provides the alarm to the user. In some embodiments, the controller 472 controls the output states of the drive motors 431 and 432 based on the attitude information, generates an alarm signal, and provides the alarm to the user.

[0253] The foregoing has shown and described the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. An electric tool, comprising: A housing; A motor disposed within the housing, the motor configured to rotatably drive an output portion coupled to the motor; A controller disposed within the housing for controlling the rotation of the motor; At least one micro force sensor for detecting at least one of a parameter of a deformation amount of a preset portion of the output portion or a parameter of a force value applied to the preset portion of the output portion; The controller is connected to the micro force sensor, and the controller is configured to: obtain a detection value of the micro force sensor, determine an actual output torque of the electric tool according to the detection value, and determine an operating state of the motor according to a comparison result between the actual output torque and a preset torque.

2. The electric tool according to claim 1, characterized in that, The detection value includes: at least one of a parameter of the deformation amount of the preset portion of the output portion, a parameter of the force value, a change rate of the parameter of the deformation amount, or a change rate of the parameter of the force value.

3. The power tool according to claim 1, characterized in that, The output portion includes: An output mechanism including an output shaft for connecting a working attachment and driving the working attachment to rotate.

4. The power tool according to claim 3, characterized in that, The output mechanism includes an output housing supporting the output shaft, and the preset portion is at least partially disposed on the output housing or the output shaft.

5. The power tool according to claim 1, wherein The output portion includes: An output mechanism including an output shaft for connecting a working attachment and driving the working attachment to rotate; A transmission mechanism disposed between the motor and the output mechanism for transmitting power between the motor and the output mechanism, and the preset portion is at least partially disposed on the transmission mechanism.

6. The electric tool according to claim 5, characterized in that, The transmission mechanism includes a target member for receiving a load torque of the output shaft and causing at least one of a parameter of a deformation amount of the preset portion or applying a pressure to the preset portion.

7. The electric tool according to claim 6, characterized in that, The transmission mechanism includes a planetary gear assembly, the planetary gear assembly includes an internal gear ring, the target member is abutted by the internal gear ring, and the internal gear ring applies a torque to the target member.

8. The power tool according to claim 7, wherein, The micro force sensor determines a torque applied by the internal gear ring to the target member by detecting at least one of a parameter of a deformation amount of a preset portion or a parameter of the force value. When the controller determines that the torque applied by the internal gear ring to the target member is greater than a preset torque threshold, the controller controls the motor to operate in a preset manner.

9. The electric tool according to claim 8, characterized in that, The micro force sensor obtains a parameter of the deformation amount of the output shaft to determine the output torque of the output shaft. When the controller determines that the output torque of the output shaft is greater than a preset torque, the controller controls the motor to stop or decelerate.

10. The power tool according to claim 8, characterized in that, The preset torque is set by a torque setting portion, the torque setting portion includes a torque cup, the torque cup includes a sensor and an actuating sleeve, the actuating sleeve is operably rotated around the output shaft for a user to set, and the sensor sends a corresponding signal to the controller according to the rotation of the actuating sleeve, and the controller confirms the preset torque according to the signal of the sensor.

11. The power tool according to claim 1, characterized in that, The size of the micro force sensor is less than or equal to 3 mm.

12. The power tool according to claim 1, characterized in that, The measurement frequency of the micro force sensor is greater than or equal to 500 Hz.

13. The power tool according to claim 1, wherein The working current of the micro force sensor is less than or equal to 10 mA.

14. An electric tool, comprising: A housing; A motor is disposed within the housing, and the motor is configured to drive the output shaft to rotate; A controller is disposed within the housing, and the controller controls the rotation of the motor; An actuating sleeve is operably rotatable about the output shaft for a user to set a torque threshold. When the actuating sleeve rotates, the actuating sleeve generates an axial displacement in a direction parallel to the extension direction of the output shaft; A micro force sensor is configured to detect at least one of a parameter of the deformation amount of a preset part of the actuating sleeve or a parameter of the applied force value when the actuating sleeve rotates. The force-receiving surface of the micro force sensor intersects the output shaft; The controller is connected to the micro force sensor, and the controller is configured to: obtain the detection value of the micro force sensor, determine the torque threshold according to the obtained detection value, and the controller controls the operating state of the motor according to the torque threshold.

15. The power tool according to claim 14, characterized in that, The power tool includes a torque setting portion, and the torque setting portion includes: The actuating sleeve and the micro force sensor; It further includes: An elastic member, and the elastic member is used to apply a corresponding force to the micro force sensor when the actuating sleeve rotates and axially displaces in a direction parallel to the extension direction of the output shaft.

16. The power tool according to claim 15, wherein When the controller determines that the output torque of the output shaft is greater than the torque threshold, it controls the motor to stop or operate at a reduced speed.

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