Chain saw and electric tool

Abstract

A chain saw, comprising: a working component, which comprises a guide plate (11) and a chain (12); a body portion, which comprises a housing (13), wherein the front end of the body portion is configured to enable the working component to be mounted; an electric motor, which is accommodated in the housing (13), and outputs power to drive the working component to work; a power supply device (2), which is detachably connected to the housing (13) to provide electric energy for the chain saw; a display device (34), which is mounted to the housing (13), wherein the display device (34) has a display interface configured to display an operation state of the chain saw; and a control device, which is at least electrically connected to the display device (34), and is configured to be able to light up the display interface in response to any one of multiple instructions. The chain saw can automatically activate the brightness of a display interface of a display device, thus preventing a user from being distracted when the user manually lights up the display interface, and improving the safety performance of the chain saw. Further provided is an electric tool.

Description

Chainsaws and power tools

[0001] This application claims priority to Chinese patent applications filed with the China Patent Office on June 30, 2023, with application number 202321716369.3, filed with the China Patent Office on June 30, 2023, with application number 202310803482.3, filed with the China Patent Office on June 30, 2023, with application number 202310805399.X, filed with the China Patent Office on June 30, 2023, with application number 202311277454.9, filed with the China Patent Office on September 28, 2023, with application number 202322807316.9, filed with the China Patent Office on October 18, 2023, and with application number 202410239718.X, and the entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of chain saws and electric tools. Background Art

[0003] A related art chain saw is equipped with a display device. However, when a user needs to view the operating status of the chain saw, the user is often required to press a display button to activate the display interface of the display device. This method easily distracts the user, preventing them from concentrating on the current task and potentially leading to safety accidents. In addition, to avoid the above-mentioned problems, some chain saws set the display interface of the display device to be always on. Although this improves the safety performance of the chain saw, this setting means that the display interface remains in the display state even when the user does not need to view the operating status of the chain saw, wasting a large amount of energy and being detrimental to energy conservation and environmental protection.

[0004] This section provides background information related to the present application which is not necessarily prior art.

[0005] Summary of the Invention

[0006] One object of the present application is to solve or at least alleviate some or all of the above-mentioned problems. To this end, one object of the present application is to provide a chainsaw with an automatic activation of the display interface brightness of a display device, which can automatically activate the brightness of the display interface of the display device according to the user's usage needs, thereby improving the safety performance of the chainsaw and also contributing to energy conservation and environmental protection.

[0007] To achieve the above objectives, the present application adopts the following technical solutions: a chain saw, comprising: a working part, including a guide plate and a chain; a main body, including a shell, and the front end of the main body is configured to be able to install the working part; a motor, accommodated in the shell, the motor outputs power to drive the working part to work; a power supply device, detachably connected to the shell to provide power to the chain saw; a display device, installed to the shell, the display device has a display interface for displaying the operating status of the chain saw; a control device, electrically connected to at least the display device; the control device is configured to be able to respond to any one of a plurality of preset instructions to light up the display interface.

[0008] The plurality of preset instructions include at least two of a button trigger instruction, a dial trigger instruction, a hardware plug-and-pull trigger instruction, a touch input instruction, or a remote trigger instruction.

[0009] The display device is provided with a touch area, and the touch area is used to receive touch input instructions.

[0010] It also includes an operating element, and the control device is configured to light up the display interface in response to an instruction output by the operating element.

[0011] The operating element includes at least one of a button, a dial or a switch.

[0012] Among them, the display device is configured to be able to communicate with an external device; the external device is at least configured to allow the user to light up or turn off the display interface, and generate a remote trigger instruction based on the user operation.

[0013] The control device is further configured to detect the plug-in connection status of the power supply device and generate a hardware plug-in trigger instruction based on the plug-in connection status.

[0014] It also includes a photosensitive module, which is integrated with the display device or the housing; the control device is configured to obtain light detection information from the photosensitive module and convert the light detection information into a first brightness adjustment instruction.

[0015] The display device is configured to be able to communicate with an external device; the external device is at least configured to allow the user to set the display brightness of the display interface.

[0016] The control device is configured to close the display interface when the chain saw is not in operation for a continuous period reaching a preset time.

[0017] The display device is configured to set the preset time in a stepless adjustment manner.

[0018] It also includes an Internet of Things module, which is configured to at least be able to communicate with an external device to receive or send information related to the chainsaw; the projection of the display plane on the first plane at least partially overlaps with the projection of the Internet of Things module on the first plane, and the first plane is basically parallel to the display plane.

[0019] Among them, at least a part of the Internet of Things module is located in a preset spherical area with the display center of the display interface as the center of the circle; the radius of the preset spherical area is greater than or equal to 0 mm and less than or equal to 50 mm.

[0020] Among them, the Internet of Things module is provided with a UART interface, and the Internet of Things module is connected to the control device for two-way communication through the UART interface.

[0021] An electric tool, comprising: a cutting part; a main body including a shell, the front end of the main body being configured to be able to mount the cutting part; a motor accommodated in the shell, the motor outputting power to drive the cutting part to work; a power supply device detachably connected to the shell to provide power to the cutting tool; a display device mounted to the shell, the display device having a display interface for displaying the operating status of the chain saw; a control device electrically connected to at least the display device; the control device being configured to be able to respond to any one of a plurality of preset instructions to illuminate the display interface.

[0022] A chainsaw comprises: a working part, including a guide plate and a chain; a main body, including a shell, the front end of the main body being configured to be able to mount the working part; a motor, housed in the shell, the motor outputting power to drive the working part to work; a power supply device, detachably connected to the shell to provide power to the chainsaw; a display device, mounted to the shell, the display device having a display interface for displaying the operating status of the chainsaw; a control device, at least electrically connected to the display device; the display interface having at least a first display brightness and a second display brightness; the control device being configured to be able to respond to any one of at least two preset instructions to control the display interface to switch from the first display brightness to the second display brightness.

[0023] Among them, the at least two preset instructions include at least one of the following: a button trigger instruction, an adaptive light-sensitive trigger instruction or a remote trigger instruction.

[0024] Among them, it also includes: a photosensitive module, which is integrated with the display device or the shell; the control device is configured to obtain light detection information of the photosensitive module and convert the light detection information into a first brightness adjustment instruction.

[0025] Among them, it also includes: an operating member, the operating member includes at least one of the following: a button, a dial or a switch, and the control device is configured to obtain position detection information of the operating member and convert the position detection information into a second brightness adjustment instruction.

[0026] The display device is configured to be able to communicate with an external device; the external device is at least configured to allow the user to set the display brightness of the display interface.

[0027] The benefit of the present application lies in that: by providing the display device of the chainsaw with a display interface for displaying the operating status of the chainsaw, the control device is at least electrically connected to the display device, and the control device is configured to be able to respond to any one of a variety of instructions to illuminate the display interface, so that the user does not need to manually illuminate the display interface of the display device, thereby avoiding the user being distracted by manually lighting the display interface, thereby improving the safety performance of the chainsaw. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a side view of a chain saw provided in an embodiment of the present application;

[0029] FIG2 is a top view of a chain saw provided in an embodiment of the present application;

[0030] FIG3 is a schematic diagram of a display interface of a display device provided in an embodiment of the present application;

[0031] FIG4 is a schematic diagram of an electric control principle provided in an embodiment of the present application;

[0032] FIG5 is a schematic diagram of the structure of the guide plate pressing the cover plate from one viewing angle provided by an embodiment of the present application;

[0033] FIG6 is a schematic structural diagram of a guide plate pressing a cover plate from another perspective provided by an embodiment of the present application;

[0034] FIG7 is a schematic structural diagram of a nut anti-lost structure from one viewing angle provided by an embodiment of the present application;

[0035] FIG8 is a structural diagram of a nut anti-lost structure from another perspective provided by an embodiment of the present application;

[0036] FIG9 is a plan view of an electric tool as an embodiment of the present application;

[0037] FIG10 is a schematic diagram of the electric control principle of the power tool shown in FIG9;

[0038] FIG11 is another electrical control schematic diagram of the power tool shown in FIG9 ;

[0039] 12 is a control flow chart of the controller starting the motor in the power tool shown in FIG9 ;

[0040] 13 is another control flow chart of the controller starting the motor in the power tool shown in FIG9 ;

[0041] FIG14 is another control flow chart of the controller starting the motor in the power tool shown in FIG9 ;

[0042] FIG15 is a perspective view of a chain saw as one embodiment of the present application;

[0043] FIG16 is an exploded view of a portion of the chain saw shown in FIG15 ;

[0044] FIG17 is a plan view of the braking mechanism of the chain saw shown in FIG15;

[0045] 18 is a plan view of the brake operating member, the stopper member, and the target member in the electronic brake of the brake mechanism shown in FIG17 at different positions;

[0046] FIG19 is a plan view of the brake operating member shown in FIG18 when the electronic brake is triggered;

[0047] FIG20 is a plan view of the brake operating member shown in FIG18 when the mechanical brake is triggered;

[0048] 21 is a perspective view of the housing of the chain saw shown in FIG15 and the brake operating member and the stopper of the brake mechanism;

[0049] 22 is a perspective view of a brake operating member, a stopper, and a target member in an electronic brake of the brake mechanism shown in FIG. 17 . DETAILED DESCRIPTION

[0050] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0051] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0052] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0053] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0054] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0055] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0056] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0057] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. Where a unit "controller," "processor," "central processing unit," "CPU," or "MCU" is used to perform a particular function, unless otherwise specified, the function may be performed by a single unit or multiple units.

[0058] In this application, the terms "device", "module" or "unit" can be implemented in the form of hardware or software to achieve specific functions.

[0059] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0060] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0061] The power tool may be a handheld power tool, a walking power tool, a long-pole power tool, or a gardening power tool such as a lawn mower or a pruner. This application does not limit the type of power tool. As long as the power tool can adopt the substantive content of the technical solution disclosed below, it falls within the scope of protection of this application.

[0062] FIG1 is a side view of a chain saw provided in an embodiment of the present application, and FIG2 is a top view of a chain saw provided in an embodiment of the present application. FIG1 and FIG2 illustrate specific embodiments of the power tool used in the present application, such as a chain saw. In practice, the present application is applicable to handheld power tools such as electric drills, electric wrenches, electric screwdrivers, electric hammer drills, electric circular saws, and sanders, bench tools such as table saws, and outdoor tools such as lawn mowers, snow blowers, grass trimmers, electric shears, pruning machines, chain saws, and pole saws. Obviously, the following embodiments are only some of the embodiments of the present application, and not all of them.

[0063] As shown in Figures 1 and 2, the chain saw 100 includes a tool body 1 and a power supply 2, which is used to provide energy for the tool body 1. The tool body 1 includes working components, a main body, and a motor. The working components include a guide plate 11 and a chain 12. The main body includes a housing, and the front end of the main body can be mounted with the working components. One end of the guide plate 11 is supported by the housing 13, and the other end extends out of the housing 13 along the longitudinal direction of the housing 13. The guide plate 11 supports and guides the chain 12. The motor is disposed in the accommodation space formed by the housing 13. The power supply 2 supplies power to the motor so that the motor drives the chain 12 to rotate under the guidance of the guide plate 11 to perform the cutting function. The power supply 2 includes at least one battery pack 21, which is detachably connected to the housing 13, making it convenient for the user to replace the battery pack 21 and extending the service life of the chain saw 100.

[0064] In some embodiments, the housing 13 is formed with or connected to a handle 14 extending in the front-to-back direction. The handle 14 includes a grip portion 141 for the user to grasp. The handle 14 is positioned behind the battery pack 21 in the front-to-back direction, making it convenient for the user to grasp and ergonomically designed. A rear handle operating member 35 is provided at the front end of the handle 14 for user control. The rear handle operating member 35 is used to control the starting and stopping of the chain saw 100. The rear handle operating member 35 is conveniently positioned for user operation and enhances user comfort.

[0065] In some embodiments, the chainsaw 100 further includes a display device 34. The display device 34 is at least partially located above the battery pack 21. The display device 34 is mounted on the housing 13 and includes at least one display interface for displaying the current status of the chainsaw 100. This fully utilizes the space on the housing 13, and the battery pack 21 does not obstruct the display device 34. Specifically, the display device 34 is positioned above the battery pack 21, with its projection on a bottom plane perpendicular to the plane of the guide bar 11 at least partially located within the projection of the battery pack 21 on the bottom plane. This reduces the front-to-back dimensions of the chainsaw 100 and improves its compactness. The display device 34 is positioned forward of the handle 14 in the front-to-back direction. When a user grips the handle 14, the display device 34 faces the user, making it easier for the user to view the display interface of the display device 34.

[0066] FIG3 is a schematic diagram of a display interface of a display device provided in an embodiment of the present application. Referring to FIG3 , the display interface of the display device 34 includes a brake status display area 341, a headlight operating status display area 342, a Bluetooth connection status display area 343, a low fuel alarm display area 344, a cutting mode display area 345, a fuel output display area 346, a cutting load display area 347, an overtemperature icon display area 348, and a battery level display area 349. The cutting mode display area 345 has three levels of display: one grid is illuminated in the first level, two grids are illuminated in the second level, and three grids are illuminated in the third level. The cutting load display area 347 has five grids, and the number of grids may be greater than or less than five, without specific limitation. The number of illuminated grids varies with the motor current during cutting of the chain saw 100.

[0067] In an optional embodiment, the display interface further includes a button indication area, which is used to indicate the working status of the operation button, so that the user can obtain the working status of the operation button through the display interface in real time, which is beneficial for the user to grasp the working status of the chain saw in real time.

[0068] The chainsaw 100 also includes multiple user-operated operating elements, including at least one operating button for triggering operational control commands. The operating button is located in a characteristic area of ​​the handle 14, which is an area accessible to the user's hand gripping the handle 14, for easy operation. The operating element can be operated to adjust at least the oil flow rate or the lighting status of the chainsaw 100. The operating elements include a first operating button 331 and a second operating button 332. The first operating button 331 is used to control the lighting status of the chainsaw 100, namely, turning the lighting module on and off or adjusting the lighting brightness. The second operating button 332 is used to adjust the oil flow rate of the chainsaw 100. During operation, a single tap of the first operating button 331 activates the lighting function of the chainsaw 100, setting the brightness to maximum, and illuminates the icon in the headlight operating status display area 342. A further tap of the first operating button 331 switches the lighting brightness, and the icon in the headlight operating status display area 342 changes accordingly. Press the first operation button 331 again to turn off the lighting, and the three gears are switched in a cycle.

[0069] The chainsaw 100 further includes an IoT module 36 configured to at least be communicatively connected with an external device to receive or send information related to the chainsaw, so that a user can control or understand the status of the tool through the IoT module 36 .

[0070] Specifically, the first operation button 331 also has the function of connecting to Bluetooth. Long pressing the first operation button 331 activates the Bluetooth pairing function. During the pairing process, the Bluetooth icon in the Bluetooth connection status display area 343 flashes. After the pairing is successful, the Bluetooth icon is permanently lit. When the Bluetooth function is turned off, the Bluetooth icon is not lit. When the Bluetooth icon is permanently lit, the external device can communicate with the tool body 1 or the battery pack 21 via Bluetooth. In some embodiments, the user can maintain and upgrade the program of the tool body 1 by operating the external device. In some embodiments, the communication method between the external device and the tool body 1 and the battery pack 21 is two-way communication; in some embodiments, relevant data such as the relevant working status and alarm information of the battery pack 21 and the tool body 1 can be uploaded to the external device via Bluetooth for the user's reference. In some embodiments, the user can control the gear position and other working modes of the chain saw 100 through the external device.

[0071] In an optional embodiment, the display device 34 includes at least one display plane 304. The projection of the display plane 304 on the first plane 101 at least partially overlaps with the projection of the IoT module 36 on the first plane 101. The first plane 101 and the display plane 304 are substantially parallel, and the display plane 304 may serve as a reference plane for the display device 34. In another optional embodiment, the display interface has a display center P, and at least a portion of the IoT module 36 is located within a predetermined spherical region centered on the display center P of the display interface. The radius of the predetermined spherical region is greater than or equal to 0 mm and less than or equal to 50 mm.

[0072] The external device 200 may be, but is not limited to, an electronic device with communication capabilities, such as a mobile phone, a tablet computer, or a computer. Chainsaw-related information may include, but is not limited to, the operating status of the chainsaw, such as the chain's rotational speed, and the status of the power supply 2, such as the remaining power and expected usage time, and other information that the user needs to obtain. It should be noted that the projection of the display plane 304 on the first plane and the projection of the Internet of Things module 36 on the first plane may completely overlap or partially overlap, so that the operation button for triggering the operation control command of the Internet of Things module 36 can be set near the operation buttons around the display device 34, making the hardware layout more compact, improving the integration of the chainsaw, and helping to reduce the size of the chainsaw.

[0073] Optionally, the key direction of the operation button is perpendicular or approximately perpendicular to the display plane 304, so that the user can adjust the machine while observing the status of the machine.

[0074] Optionally, a function prompt pattern is provided on the surface of the operation button, and the graphic content of the function prompt pattern is presented in a concave, convex or flat structure, so that the user can know the function of each operation button according to the function prompt pattern on the surface of the operation button, so that the user can quickly know the function of each operation button without having to check the product manual in real time, which is conducive to helping users quickly and proficiently use the chain saw.

[0075] Optionally, the chainsaw further includes at least one control panel, which is configured to implement at least one of the following: processing information related to the chainsaw, performing operation and protection control on the chainsaw, and controlling the display device 34 to perform display; the Internet of Things module 36 is provided with a UART interface, and the Internet of Things module 36 is connected to the control panel for bidirectional communication via the UART interface.

[0076] The Universal Asynchronous Receiver / Transmitter (UART) is used to achieve bidirectional communication between the IoT module 36 and the control board. Optionally, the IoT module 36 can also achieve bidirectional communication with the power supply device 2 via a UART interface. Optionally, the IoT module 36 can also achieve bidirectional communication with the control button via a UART interface. Optionally, communication between the main control board and the battery pack 21 can also be achieved via the D pin.

[0077] Optionally, the external device 200 is configured to at least set the oil output, lighting, and Bluetooth pairing of the chain saw through the Internet of Things module 36, so that the user can control the oil output (oil output system 38), lighting (lighting system 37), Bluetooth pairing, etc. of the chain saw through the external device 200; optionally, the display interface is provided with a touch area, and the touch area is used to receive touch input instructions, so that the user can operate the chain saw through the touch area of ​​the display interface, making the operation of the chain saw richer, so that the user can choose the operation method of the chain saw according to usage habits.

[0078] In an optional embodiment, as shown in Figure 4, the chain saw 100 may also include a drive circuit 21, a controller 22 and a motion detection device 23, the drive circuit 21 is electrically connected to the motor 24 to drive the operation of the motor 24; the controller 22 is accommodated in the housing 13, and the controller 22 is electrically connected to the drive circuit 21 to at least control the operation of the motor 24; the motion detection device 23 is associated with the main body or the working part, and is connected to the controller 22, and is used to detect the movement change of the main body or the working part in at least one direction; the controller 22 is configured to control the motor 24 to enter a braking process when the motion detection device 23 detects that the movement change of the main body or the working part in at least one direction exceeds a preset condition.

[0079] The chain saw is configured to be able to communicate with an external device 200; the external device 200 is at least configured to allow the user to set information related to preset conditions, or the controller 22 is further configured to control the motor to enter a braking process based on the acquired motion change and the target control program set by the external device 200.

[0080] The motion detection device 23 may include, but is not limited to, a gyroscope and / or a linear accelerometer, etc. The preset condition may be a range of allowable motion variation of the main body or working component in at least one direction input by a user via the external device 200 or the display device 34, etc.

[0081] Specifically, the user can set information related to the preset conditions through the external device 200, and the motion detection device 23 can detect the operating change in at least one direction of the main body or the working part. When the controller 22 obtains the preset conditions, if the motion detection device 23 detects that the motion change in at least one direction of the main body or the working part exceeds the preset conditions, the motor is controlled to enter the braking process, so that when the operating state of the chain saw is not within the preset range, the controller can automatically control the motor to enter the braking process, thereby improving the operational safety performance of the chain saw during use.

[0082] In an exemplary embodiment, the preset conditions may include speed preset conditions and angle preset conditions. When the chain saw is cutting forward, when the speed of the chain saw in the Y direction exceeds the speed preset condition, the controller controls the motor to enter a braking process to stop the chain saw within a specified time. At the same time, when the angle of the chain saw in the Y direction exceeds the angle preset condition, the controller also controls the motor to enter a braking process to stop the chain saw within a specified time. In another optional embodiment, when the chain saw is cutting sideways, when the speed of the chain saw in the X direction exceeds the speed preset condition, the controller controls the motor to enter a braking process to stop the chain saw within a specified time. At the same time, when the angle of the chain saw in the X direction exceeds the angle preset condition, the controller also controls the motor to enter a braking process to stop the chain saw within a specified time. In another exemplary embodiment, when the user releases the rear handle operating member 35 normally, the controller also controls the motor to enter a braking process, or the chain saw enters a normal braking process.

[0083] Optionally, the preset condition is related to the braking sensitivity. The external device 200 is configured to set the braking sensitivity of the braking system 39 of the chain saw 100 by inorganic adjustment. In an optional embodiment, the braking sensitivity satisfies: greater than or equal to 0, and less than or equal to 100%. When the braking sensitivity is 0, it is equivalent to turning off the automatic braking function, so that the user can set the preset condition through the external device 200, adjust the braking timing and braking sensitivity, so that the chain saw is suitable for customers with different requirements and improve the user experience.

[0084] Optionally, the target control program matches the braking sensitivity, and the external device 200 is configured to set the braking sensitivity using a stepless adjustment method. In an optional embodiment, the braking sensitivity satisfies: greater than or equal to 0, and less than or equal to 100%, so that the user can set preset conditions through the external device 200, adjust the braking timing and braking sensitivity, so that the chain saw is suitable for customers with different requirements and improve the user experience.

[0085] Optionally, the chain saw provided in this embodiment further includes a rear handle operating member 35 , and the controller is further configured to obtain a first braking signal triggered by the rear handle operating member 35 , and control the motor to enter a braking process according to the first braking signal.

[0086] The first braking signal may be a signal for the control motor to enter a braking process triggered by the rear handle operating member 35. In an optional embodiment, the first braking signal is triggered when the rear handle operating member 35 is released.

[0087] Specifically, when the movement change of the main body or working part of the chain saw in at least one direction exceeds a preset change, the rear handle operating member 35 can trigger a first braking signal, so that when the controller obtains the first braking signal, it can control the motor to enter the braking process according to the first braking signal.

[0088] Optionally, the chain saw further includes a front baffle 17 , and the controller is further configured to obtain a second braking signal triggered by the front baffle 17 , and control the front baffle 17 to perform mechanical braking according to the second braking signal.

[0089] The second brake signal may be a signal triggered by the front plate 17 to control the chain saw to mechanically brake. Specifically, when the movement variation of the main body or working component of the chain saw in at least one direction exceeds a preset variation, the front plate 17 may trigger the second brake signal. Thus, upon receiving the second brake signal, the controller may control the front plate 17 to perform mechanical braking based on the second brake signal.

[0090] Optionally, the external device 200 is further configured to allow the user to set a brake mode, which includes any one or a combination of automatic brake mode, manual brake mode, and mechanical brake mode. In one exemplary embodiment, the user can set the brake mode to a single automatic brake mode through the external device 200. In another exemplary embodiment, the user can set the brake mode to a single manual brake mode through the external device 200. In yet another optional embodiment, the user can set the brake mode to a single mechanical brake mode through the external device 200. In yet another optional embodiment, when the chain speed of the chain saw is greater than 18 m / s, traditional mechanical brakes alone may not meet the requirements. Therefore, the user can use a combination of multiple brake modes to stop the motor in a short period of time. For example, the user can also set the brake mode to a combination of automatic brake mode and manual brake mode through the external device 200, or the user can also set the brake mode to a combination of automatic brake mode, manual brake mode, and mechanical brake mode through the external device 200, so that the user can independently select the brake mode according to usage habits.

[0091] In an optional embodiment, the chain saw provided in this embodiment further includes a control device electrically connected to at least the display device 34; the control device is configured to be able to respond to any one of a plurality of preset instructions to illuminate the display interface.

[0092] The plurality of preset instructions may include, but are not limited to, at least one of a button trigger instruction, a dial trigger instruction, a hardware plug-and-pull trigger instruction, or a remote trigger instruction.

[0093] Specifically, when the control device receives one or more of a button trigger instruction, a dial trigger instruction, a hardware plug-in trigger instruction, or a remote trigger instruction issued by the user, the control device responds to the triggered instruction to light up the display interface, so that the user does not need to manually light up the display interface of the display device 34, thereby avoiding the user being distracted by manually lighting up the display interface, thereby improving the safety performance of the chain saw.

[0094] Optionally, the chain saw further comprises an operating member, which comprises at least one of a button, a dial or a switch, and the control device is configured to respond to a trigger instruction of any one of the operating members.

[0095] In an exemplary embodiment, when the user operates a button, a button triggering instruction is triggered, so that when the user controls the chain saw by operating the button, the control device can respond to the button triggering instruction to light up the display interface.

[0096] Optionally, the display device 34 is configured to be communicably connected to the external device 200; the external device 200 is at least configured to allow the user to light up or turn off the display interface, and generate a remote trigger instruction based on the user operation.

[0097] In an exemplary embodiment, when the user preliminarily lights up the display interface, a remote trigger instruction may be generated by operating the external device 200 , and the control device may respond to the remote trigger instruction to light up the display interface.

[0098] Optionally, the control device is further configured to detect the plug-in connection status of the power supply device 2 and generate a hardware plug-in trigger instruction based on the plug-in connection status, so that the control device can light up the display interface according to the hardware plug-in trigger instruction.

[0099] In an optional embodiment, the display interface has at least a first display brightness and a second display brightness; the control device is configured to respond to any one of at least two preset instructions to control the display interface to switch from the first display brightness to the second display brightness.

[0100] It should be noted that the above-mentioned preset instructions are stored in a storage module inside the tool or on the terminal device. Specifically, the above-mentioned preset instructions are a plurality of predetermined instructions that are pre-set.

[0101] In this embodiment, the first display brightness and the second display brightness can be set according to actual needs. If the first display brightness is set to 0 and the second display brightness is set to 100%, the control device can realize the lighting and closing control of the display interface by brightness switching.

[0102] Optionally, the control device is configured to control the display interface to close when the chain saw does not perform any operation for a preset time, so that when the user does not need to check the operating status of the chain saw through the display device 34, the display interface is closed, which is beneficial to energy saving and environmental protection and improves the economy of the chain saw.

[0103] The preset time can be a time set by the user according to their own needs for the display interface to be turned off when no operation is performed. In an optional embodiment, the display device 34 is configured to set the preset time in a stepless adjustment manner, so that the user can set the preset time to any time according to their own needs, which can meet the display duration requirements of different users.

[0104] Optionally, the chain saw further includes a photosensitive module, which is integrated with the display device 34 or the housing 13 ; the control device is configured to obtain light detection information from the photosensitive module and convert the light detection information into a first brightness adjustment instruction.

[0105] The photosensitive module may include, but is not limited to, a light sensor, and the first brightness adjustment instruction may include the brightness of the display interface. When the brightness of the display interface is 0, the display interface may be turned off.

[0106] In an exemplary embodiment, the greater the light intensity in the light detection information of the photosensitive module, the greater the brightness of the display interface in the first brightness adjustment instruction, so that the brightness of the display interface can be changed according to the intensity of the ambient light, so that the user does not need to manually adjust the brightness of the display interface, and can always see the display content clearly regardless of the ambient light, thereby protecting the user's eyes. At the same time, when the intensity of the ambient light is weak, the brightness of the display interface is controlled to be reduced, which is beneficial to energy saving and environmental protection, and improves the economy of the chain saw.

[0107] In an optional embodiment, the chain saw further includes an operating member, which includes at least one item: a button, a dial or a switch. The control device is configured to obtain position detection information of the operating member and convert the position detection information into a second brightness adjustment instruction, so that the user can adjust the brightness of the display interface through the button, dial or switch; in another optional embodiment, the display device 34 is configured to be able to communicate with the external device 200; the external device 200 is at least configured to allow the user to set the brightness of the display interface, so that the user can adjust the brightness of the display interface through the external device 200, so that the user can adjust the brightness of the display interface according to his or her preferences, and choose a method to set the brightness of the display interface.

[0108] In some embodiments, as shown in Figures 5 to 8 , the chainsaw further includes a nut anti-loss structure 4, which is disposed on a guide plate clamping cover 5, which is used to secure the guide plate 11. A compression nut is connected to the guide plate clamping cover 5 via a spring wire 41, ensuring that the nut can be tightened to the bolt and preventing the nut from falling off or being lost during disassembly.

[0109] In some embodiments, the chain saw 100 also includes a chip block 6, which is installed at the tail of the guide plate pressing cover 5, adjacent to the battery pack. On the one hand, it is used to guide chip removal to prevent wood chips from entering the battery pack; on the other hand, it prevents the chain from falling off and hitting the battery pack, providing secondary protection for the battery pack.

[0110] Based on the same concept, this embodiment also provides an electric tool, including a tool body or main body, a power supply device, a motor, a working part or output part or cutting part, a motor, a drive circuit, a controller and a motion detection device, etc.; the tool body includes a shell, and the front end of the tool body is configured to be able to install a working part; the power supply device is detachably connected to the shell to power the electric tool; the motor is powered by the power supply device; the working part is installed at the front end of the tool body, and is driven by the motor to realize the cutting function of the electric tool; the motor is accommodated in the shell, and the motor outputs power to drive the working part to work; the drive circuit is electrically connected to the motor to drive the operation of the motor; the controller is accommodated in the shell, and the controller is electrically connected to the drive circuit to at least control the operation of the motor; the motion detection device is associated with the main body or working part and connected to the controller, and is used to detect the change in movement of the main body or working part in at least one direction; the electric tool is configured to be able to communicate with an external device; the external device is at least configured for user operation to start or turn off the automatic braking mode of the electric tool; in the automatic braking mode, the controller can control the motor to enter a braking process based on the acquired motion change.

[0111] Specifically, when the user operates an external device to start the automatic braking mode, the controller can control the motor to enter the braking process based on the obtained operating change. When the user operates an external device to turn off the automatic braking mode of the power tool, the controller of the power tool will not be able to control the motor to enter the braking process based on the obtained motion change, so that the user can start or turn off the automatic braking mode of the power tool according to their own needs, thereby making the power tool suitable for users with any needs and improving the universality of the power tool.

[0112] Optionally, the power tool also includes an Internet of Things module, which is configured to at least be able to communicate and connect with an external device; the external device is configured to set the braking sensitivity of the automatic braking mode using a stepless adjustment method, so that the user can set different braking sensitivities of the automatic braking mode through the external device according to his or her sensitivity requirements. In an optional embodiment, the braking sensitivity satisfies greater than or equal to 0 and less than or equal to 100%, thereby making the power tool suitable for users with different needs, further improving the universality of the power tool.

[0113] Optionally, the power tool in this embodiment may further include a display device mounted to the housing for displaying the operating status of the power tool; an Internet of Things module configured to at least be able to communicate with an external device to receive or send information related to the power tool; the display device includes at least one display interface; at least part of the Internet of Things module is located within a preset spherical area with the display center of the display interface as the center of the circle; the radius of the preset spherical area is greater than or equal to 0 mm and less than or equal to 50 mm, so that the operation button for triggering the operation control instruction of the Internet of Things module can be set near the operation buttons around the display device, making the hardware layout more compact, improving the integration of the chain saw, and helping to reduce the volume of the chain saw.

[0114] Optionally, in this embodiment, the display interface can be used to display the operating status of the chain saw. The power tool further includes a control device, which is configured to respond to any one of a plurality of preset instructions to light up the display interface.

[0115] The plurality of preset instructions may include, but are not limited to, at least one of a button trigger instruction, a dial trigger instruction, a hardware plug-and-pull trigger instruction, or a remote trigger instruction.

[0116] Specifically, when the control device receives one or more of a button trigger instruction, a dial trigger instruction, a hardware plug-in trigger instruction, or a remote trigger instruction issued by the user, the control device responds to the triggered instruction to light up the display interface, so that the user does not need to manually light up the display interface of the display device 34, thereby avoiding the user being distracted by manually lighting up the display interface, thereby improving the safety performance of the power tool.

[0117] FIG9 illustrates an electric tool 100 as an embodiment of the present application. The electric tool 100 shown in FIG9 is a chainsaw 100a. The electric tool 100 in other embodiments may also be other types of handheld electric tools 100, such as circular saws, electric drills, and impact wrenches, or bench-type tools 100, such as miter saws and table saws, or outdoor power equipment 100, such as lawn mowers and snow blowers. The following description focuses on the chainsaw 100a as an example. However, it should be understood that the electric tool 100 to which the technical solution of the present application is applied is not limited to the chainsaw 100a, nor is it limited to the tool categories described above.

[0118] 9 to 11 , the power tool 100 includes a housing 10, functional components 20, a motor 30, and a power supply 40. The housing 10 forms the main body of the power tool 100, connecting and supporting the aforementioned components and forming a housing space capable of accommodating or partially accommodating the aforementioned components. The functional components 20 are the components of the power tool 100 that actually perform operations such as cutting, tightening, grinding, and impacting. In this embodiment, the functional component 20 in the chain saw 100a is a chain 20a. The chain 20a and the guide plate 21a can form a working component mounted at the front of the chain saw 100a. The guide plate 21a extends forward from the front end of the housing 10. The chain 20a is arranged around the outer periphery of the guide plate 21a. When the chain saw 100a is in operation, the chain 20a rotates around the guide plate 21a and cuts target objects such as wood and metal. The power tool 100 generally also includes an operating element for the user to operate to start or stop the motor 30 to be described later, but this does not rule out the possibility of being started directly by connecting a power cord to the mains or plugging in a battery pack, etc. without an operating element.

[0119] The motor 30 is the prime mover in the power tool 100. When the motor shaft of the motor 30 rotates, it can drive the functional component 20 directly or indirectly through a transmission assembly. In this embodiment, the rotation of the motor shaft directly or indirectly through a transmission assembly drives the chain 20a to move around the guide plate 21a to perform the cutting operation. In some examples, the motor 30 may be a brushless motor 30. The power supply 40 provides electrical energy to the power tool 100, supplying power to at least the motor 30 and the controller 50, which will be described later. Specifically, the power supply 40 is electrically connected to the motor 30 and the controller 50, which will be described later. It should be noted that the electronic circuitry described here is for transmitting electrical energy, not for transmitting data. In some examples, the power supply 40 may be a battery pack that is detachably connected to the power tool 100, such as the chainsaw 100a. In other examples, the power supply to the power tool 100, such as the chainsaw 100a, may also be achieved using mains electricity, an AC power source, and a power adapter or related circuits such as voltage conversion, rectification, and voltage stabilization.

[0120] 10 and 11 , the power tool 100 includes, in addition to a housing 10, functional components 20, a motor 30, and a power supply 40, a controller 50 for controlling the operation of the motor 30. The controller 50 may be an MCU (Microcontroller Unit), an ARM (Advanced Reduced Instruction Set Computing Machine), a DSP (Digital Signal Processor), or the like, and controls the operation of the motor 30 by executing relevant programs. The controller 50 generally outputs corresponding control signals to the motor 30 to cause the motor 30 to operate at a desired speed and direction. Typically, to drive the motor 30 to operate normally, the power tool 100 also includes a drive device 60, such as an inverter bridge and an integrated driver chip. The drive device 60 is electrically connected to the controller 50 and the motor 30, receives control signals from the controller 50, and outputs corresponding drive signals to the motor 30. In some cases, the power tool 100 may further include a parameter detection device 70 for detecting parameters such as the speed, torque, and rotor position of the motor 30. The controller 50 may utilize these parameters from the parameter detection device 70 to control the operation of the motor 30. On this basis, the controller 50 can control the motor speed and speed change process by running the relevant control program. For example, the controller 50 can control the motor 30 to increase to a set speed at a set acceleration. Of course, the controller 50 can also control the motor speed to change in a nonlinear or other complex manner.

[0121] In order to clarify the subsequent technical solutions, the startup process of the power tool 100 is explained below. After the tool is started by the user, the power supply device 40 will first supply power to the controller 50. Although the controller 50 has received power from the power supply device 40 at the beginning of power supply, it has not yet communicated with the power supply device 40 and cannot obtain the power parameter information of the power supply device 40 such as model, capacity, voltage, number of parallel cells, etc. The controller 50 will start to control the start of the motor 30 without the power parameters. However, after a short period of time, the controller 50 can exchange the above power parameter information with the power supply device 40. In view of the relevant issues in the above startup process described above, in order to ensure the life and safety of the power tool 100 and its assembled battery pack 40, and to improve the user feel when the tool is started, this application will propose a more accurate and effective power tool 100 motor 30 startup control scheme.

[0122] The controller 50 of the power tool 100 is configured to control the motor 30 to start using a first starting mode when the motor 30 is started for the first time after power is applied, and to control the motor 30 to start using a second starting mode when the motor 30 is not started for the first time after power is applied. The first starting acceleration of the motor 30 in the first starting mode is less than the second starting acceleration in the second starting mode.

[0123] In this embodiment, the initial start-up of the motor 30 after the controller 50 is powered on occurs when the power tool 100 is turned on after the entire machine is powered off, for example, each time the power tool 100 is started. In this case, the controller 50 has not communicated with the power supply device 40 before starting the motor 30 and has no power supply parameter information. The non-initial start-up of the motor 30 after the controller 50 is powered on occurs when the entire machine and the controller 50 are not powered off, but the motor 30 has powered off or stopped. For example, during use of the power tool 100, the trigger is briefly released and then pulled again to start the motor. In this case, the controller 50 has already communicated with the power supply device 40 before restarting the motor 30 and has the power supply parameter information.

[0124] The controller 50 uses different starting modes for the two aforementioned starting conditions. The first starting mode, used when the motor 30 is started for the first time, differs from the second starting mode, used when the motor 30 is not started for the first time, in that the first starting acceleration of the motor 30 in the first starting mode is, at least initially, lower than the second starting acceleration of the motor 30 in the second starting mode. Specifically, assuming that in the first starting mode, the controller 50 controls the motor speed to increase from zero to the target speed at the first starting acceleration, and in the second starting mode, the controller 50 controls the motor speed to increase from zero to the target speed at the second starting acceleration, the first starting acceleration is lower than the second starting acceleration.

[0125] In the above-described embodiment, the power tool 100 can start the motor 30 in a relatively smooth process even when information such as the battery pack capacity and ambient temperature is unknown. This allows the user to gradually adapt to the feel of the tool and avoids safety and lifespan threats such as high currents lowering the battery pack voltage. However, when the motor 30 is not being started for the first time, the power tool 100 has not yet entered a power-off state, the power supply 40 is still supplying power, and the battery pack has already heated up. Therefore, starting the motor 30 quickly mitigates any safety and lifespan threats to the tool and battery pack. Furthermore, information such as the battery pack capacity and ambient temperature may already be available, allowing the motor 30 to be started in a manner appropriate to that information. Furthermore, the battery pack has already heated up, and the user has become accustomed to the feel of the tool.

[0126] In some embodiments, referring to FIG. 12 , FIG. 12 is a flow chart of a control scheme for the controller 50 in the power tool 100 to start the motor 30 , specifically including:

[0127] 410 , the controller 50 obtains the current ambient temperature of the power tool 100 ;

[0128] 420 , when the controller 50 starts the motor 30 for the first time after power-on, the controller 50 controls the motor 30 to start using a first starting mode corresponding to the current ambient temperature;

[0129] 430 , when the controller 50 is not starting the motor 30 for the first time after power-on, the controller 50 adopts the second starting mode to control the motor 30 to start, and the first starting acceleration is lower than the second starting acceleration.

[0130] In the first starting mode corresponding to the current ambient temperature, the speed change process of the controller 50 controlling the start of the motor 30 is related to the ambient temperature. Specifically, the first starting acceleration of the motor 30 in the first starting mode corresponding to the current ambient temperature is related to the ambient temperature. In some examples, the first starting acceleration is positively correlated with the ambient temperature. When the ambient temperature is lower, the first starting acceleration is smaller, and the motor 30 starts more slowly in the first starting mode. When the ambient temperature is higher, the first starting acceleration is larger, and the motor 30 starts more quickly in the first starting mode. The positive correlation between the first starting acceleration and the ambient temperature can be linear or nonlinear, depending on the actual scenario requirements such as the visual tool type and working conditions. In other examples, the first starting acceleration has two different values ​​depending on whether the ambient temperature is lower than the first temperature threshold. The smaller value is selected when the ambient temperature is lower than the first temperature threshold, and the larger value is selected when the ambient temperature exceeds the first temperature threshold.

[0131] In some other embodiments, referring to FIG. 13 , FIG. 13 is a flow chart of another control scheme for the controller 50 in the power tool 100 to start the motor 30 , specifically including:

[0132] 510 , the controller 50 obtains the current ambient temperature of the power tool 100 ;

[0133] 520 , when the controller 50 starts the motor 30 for the first time after power-on, the controller 50 adopts the first starting mode to control the motor 30 to start, and the first starting acceleration is lower than the second starting acceleration;

[0134] 530 , when the controller 50 is not starting the motor 30 for the first time after power-on, the controller 50 adopts the second starting mode corresponding to the current ambient temperature to control the motor 30 to start.

[0135] In the second starting mode corresponding to the current ambient temperature, the speed change process of the motor 30 controlled by the controller 50 is related to the ambient temperature. Specifically, the second starting acceleration is positively correlated with the ambient temperature. The second starting acceleration decreases at lower ambient temperatures and increases at higher ambient temperatures. This positive correlation can be linear or nonlinear, depending on the specific needs of the tool type, operating conditions, and other scenarios. Alternatively, the second starting acceleration can have two different values ​​depending on whether the ambient temperature is below a second temperature threshold: the smaller value is used when the ambient temperature is below the second temperature threshold, and the larger value is used when the ambient temperature exceeds the second temperature threshold.

[0136] There are multiple optional implementation methods for the controller 50 to obtain the current ambient temperature of the power tool 100. In one embodiment, the controller 50 can obtain the current ambient temperature by detecting the electrical parameters of the thermistor in the relevant circuit. Specifically, the controller 50 can convert the current ambient temperature from the temperature characteristics of the NTC element (Negative Temperature Coefficient) on the MOS board, such as resistance, voltage, current, and other electrical parameters. In other embodiments, the controller 50 can also obtain the ambient temperature at other temperature measurement points through other types of temperature sensors.

[0137] The above two types of embodiments describe that the ambient temperature can be included in the motor starting strategy as an independent variable when the controller 50 is powered on for the first time or non-first time when the motor 30 is started. Parameters such as starting acceleration in the first or second starting mode will be adjusted accordingly as dependent variables. When the first starting acceleration and the second starting acceleration are both positively correlated with the ambient temperature, the mapping relationship between the two and the ambient temperature can be different to adapt to the impact of the ambient temperature on different motor starting conditions.

[0138] In some embodiments, referring to FIG. 14 , FIG. 14 is a flow chart of another control scheme for the controller 50 in the power tool 100 to start the motor 30 , specifically including:

[0139] 610 , when the controller 50 starts the motor 30 for the first time after power-on, the controller 50 adopts the first starting mode to control the motor 30 to start, and the first starting acceleration is lower than the second starting acceleration;

[0140] 620 , after being able to exchange data information with the power supply device 40 such as a battery pack, the controller 50 obtains power parameters of the power supply device 40 ;

[0141] 630 , when the controller 50 is not starting the motor 30 for the first time after power-on, the controller 50 uses the second starting mode corresponding to the current power supply parameters to control the starting of the motor 30 .

[0142] Among them, in the second starting mode corresponding to the current power supply parameters, the speed change process of the controller 50 controlling the start of the motor 30 is related to the power supply parameters, and the power supply parameters are not limited to one or more of the model, capacity, voltage, and number of parallel battery cells of the power supply device 40 such as the battery pack. In some embodiments, the controller 50 may also pre-store other power supply parameters that correspond to the power supply parameters such as the model of the power supply device 40.

[0143] There are multiple optional implementation methods for the speed change process of the controller 50 controlling the start of the motor 30 in the second start-up mode to be related to the power supply parameters of the power supply device 40. In some embodiments, the second starting acceleration of the motor 30 in the second start-up mode corresponding to the current power supply parameters is related to the power supply parameters. In some examples, the second starting acceleration can be positively correlated with the capacity and / or the number of parallel cells of the power supply device 40. The smaller the battery pack capacity and / or the number of parallel cells, the smaller the second starting acceleration. The larger the battery pack capacity and / or the number of parallel cells, the larger the second starting acceleration. The positive correlation between the second starting acceleration and the battery pack capacity and / or the number of parallel cells can be linear or nonlinear. In other examples, the second starting acceleration can also be related to the calculated values ​​of one or more of the above-mentioned capacity, voltage, number of parallel cells and other power supply parameters. For example, the relationship between the two can be a weighted sum or other nonlinear relationship, which can be determined by the actual scenario requirements such as the tool category and working conditions.

[0144] In other embodiments, after obtaining the power parameters of the power supply device 40, the controller 50 may switch to the second starting mode to control the motor 30 to continue starting if the initial startup process of the motor 30 in the first starting mode has not yet been completed. Specifically, assume that when the controller 50 initially starts the motor 30 after power is applied, it controls the motor 30 to increase its speed to a target speed using the first starting acceleration. While the motor 30 is accelerating to the target speed using the first starting acceleration, the controller 50 interacts with the battery pack 40 to obtain power parameters such as the battery pack capacity and the number of parallel cells. The controller 50 then switches to the second starting acceleration to control the motor 30 to continue increasing its speed from the current speed until it reaches the target speed.

[0145] It is understandable that the above-mentioned multiple types of embodiments are merely exemplary illustrations of the scheme concept of the present application. Cross-combining the above-mentioned embodiments or parts of the above-mentioned embodiments naturally leads to other derivative schemes. For example, when the controller 50 starts the motor 30 for the first time after power-on, the first starting acceleration that is lower than the second starting acceleration can be used to achieve a smooth start of the motor 30. The first starting acceleration does not take the ambient temperature into consideration. When the motor 30 is not started for the first time after power-on, the second starting acceleration that is proportional to the number of parallel cells in the currently acquired battery pack can be used to achieve a fast start of the motor 30. For another example, when the controller 50 starts the motor 30 for the first time after power-on, the first starting acceleration that is lower than the second starting acceleration and proportional to the current ambient temperature can be used to achieve a smooth start of the motor 30. When the motor 30 is not started for the first time after power-on, the second starting acceleration that is proportional to the currently acquired battery pack capacity can be used to achieve a fast start of the motor 30. As another example, when the controller 50 starts the motor 30 for the first time after power-on, it can start the motor 30 smoothly with a first starting acceleration that is lower than the second starting acceleration. After interactively obtaining power parameters such as the number of parallel cells in the battery pack, and if the first start of the motor 30 performed with the first starting acceleration is not completed, the second starting acceleration that is proportional to the number of parallel cells in the battery pack is used to complete the remaining first starts of the motor 30.

[0146] Fig. 15 shows a chain saw 100 as an embodiment of the present application. Fig. 15 also defines the directions of the front side, rear side, upper side, lower side, left side, and right side in the present application.

[0147] Referring to Figures 15 to 17 , the chainsaw 100 includes a tool body 1 and a power supply for providing energy to the tool body 1. The tool body 1 comprises a guide plate 11, a chain 12, a housing 13, and a motor 36. The guide plate 11 supports and guides the chain 12. One end of the guide plate 11 is supported by the housing 13, and the other end extends forward from the housing 13 along its longitudinal direction. The motor 36 is disposed within a housing formed by the housing 13. The power supply supplies power to the motor 36, causing it to directly or indirectly drive the chain 12 through a transmission mechanism, rotating under the guidance of the guide plate 11 to perform the cutting function.

[0148] As shown in FIG16 , the housing 13 of the chainsaw 100 may include, in addition to the left and right housings 136 and 137, a brake cover 1371 and a sprocket cover 1372 that are fixedly connected to the right housing 137. The chainsaw 100 also includes a brake mechanism 5 partially housed between the right housing 137 and the brake cover 1371, as well as related components such as the guide plate 11 and chain 12, partially housed between the brake cover 1371 and the sprocket cover 1372. It should be understood that the left-right relationship between the left and right housings 136 and 137 is merely relative. This description is intended to illustrate that the brake mechanism 5 and the sprocket portion of the chainsaw 100 are located on the same side of the chainsaw 100 in the left-right direction, thereby facilitating efficient and convenient installation and maintenance of the brake mechanism 5 and related components such as the guide plate 11 and chain 12. Of course, the brake mechanism 5 of the chainsaw 100 may also be arranged in other locations; the left and right housings 136 and 137 may also be integrally formed.

[0149] As shown in Figures 16 and 17 , the brake mechanism 5 is used to brake the motor 36 and may include a brake operating member 51 and a mechanical brake 52. The brake operating member 51 can be operated by a user to brake the chain saw 100, while the mechanical brake 52 mechanically brakes the chain saw 100 in response to rotation of the brake operating member 51. In some embodiments, the brake operating member 51 is a brake plate 51, which triggers the mechanical brake when it is pushed beyond a specific position.

[0150] As shown in Figure 15, a through hole 1310 is opened on the shell 13 of the chain saw 100, and the brake operating member 51 is rotatably connected to the shell 13 through the through hole 1310. When the brake operating member 51 is operated by the user, it rotates in the through hole 1310 relative to the through hole 1310 and the surrounding shell 13 and forms a rotating part 511. Referring to Figures 17 to 22 , a certain gap exists between the rotating portion 511 of the brake operating member 51 and the housing 13 around the through hole 1310, preventing the housing 13 from being closed near this location. Therefore, as shown in Figure 17 , in the present application, a stopper 54 is provided on the surface of the rotating portion 511 of the chain saw 100 to bridge the gap between the rotating portion 511 and the housing 13 around the through hole 1310. The stopper 54 can close the housing 13 around the through hole 1310 during rotation of the brake operating member 51, thereby significantly reducing the amount of wood chips that enter the interior of the chain saw 100 during operation. In some embodiments, the through hole 1310 in the housing 13 can be vertically extending; in other embodiments, the through hole 1310 in the housing 13 can be horizontally extending.

[0151] In some embodiments, as shown in Figures 17, 21, and 22, the brake operating member 51 includes a rotating portion 511 and an operating portion 512. The rotating portion 511 is rotatably connected to the right housing 137 and is at least partially contained within the housing space formed by the housing 13. The portion of the rotating portion 511 not located within the housing space of the housing 13 is exposed to the outside of the housing 13 through the through hole 1310. In some cases, the rotating portion 511 is actually partially contained within the housing space formed by the housing 13 and the brake cover plate 1371, with a portion exposed to the outside of the housing 13. In some examples, the rotating portion 511 can be in the shape of a disk or fan. In other examples, the rotating portion 511 can be in the shape of a ring or a partial ring. The end 5121 of the operating portion 512 is connected to the rotating portion 511 through the through hole 1310. More commonly, the operating portion 512 of the brake baffle 51 is the baffle body and the support leg, and the end 5121 of the operating portion 512 is the end of the support leg. In some examples, the brake baffle 51 may have a single leg, while in other examples, the brake baffle 51 may have two legs, one on each side of the chain saw 100. A stopper 54 is provided on the surface of the rotating portion 511 where it connects to the operating portion 512. The edge of the stopper 54 is at least partially located within the receiving space of the housing 13, so that the surface area of ​​the rotating portion 511 covered by the stopper 54 can always fill the through hole 1310 during the rotation of the brake operating member 51.

[0152] In some embodiments, as shown in Figures 15, 16, and 22, the brake operating member 51 includes a left rotating portion 511a rotatably connected to the left housing 136 and a right rotating portion 511b rotatably connected to the right housing 137. The operating portion 512 of the brake operating member 51 includes a left end portion 512a connected to the left rotating portion 511a and a right end portion 512b connected to the right rotating portion 511b. Specifically, the brake baffle 51 has two legs disposed on the left and right sides of the chain saw 100, and the ends of the left and right legs are respectively connected to the left and right rotating portions rotatably connected to the left and right housings of the chain saw 100. In some examples, the specific positions and connection methods of the left rotating portion 511a and the left end portion 512a, and the right rotating portion 511b and the right end portion 512b on the chain saw 100 may be different. For example, the through hole 1310a at the connection between the left rotating portion 511a and the left end portion 512a may be a left-right through hole, and the through hole 1310b at the connection between the right rotating portion 511b and the right end portion 512b may be a top-bottom through hole. Considering that wood chips mainly come from near the chain 12, the above-mentioned stopper 54 may be only provided on the surface of the right rotating portion 511b on the same side as the sprocket portion to bridge the gap between it and the through hole 1310b. In addition, compared with the single-leg solution, the above-mentioned design is also easier to disassemble and clean wood chips.

[0153] In some embodiments, the stopper 54 can be a sponge 54 attached to the surface of the rotating portion 511, or other materials similar to sponges that have a certain degree of elasticity and friction resistance. As shown in Figures 17 to 22, taking the sponge 54 as an example, if the stopper 54 is set on the surface of the rotating portion 511 by attaching it, the sponge 54 can include a sponge layer 541 that contacts the shell 13 around the through hole 1310 and an adhesive layer 542 that adheres to the surface of the rotating portion 511. Specifically, the sponge layer 541 can be a sponge body, and the adhesive layer 542 can be a sponge adhesive. In some examples, the surface area of ​​the rotating portion 511 covered by the adhesive layer 542, that is, the surface area of ​​the adhesive layer 542, can be larger than the surface area of ​​the sponge layer 541 to ensure a firm bond between the sponge 54 and the rotating portion 511 and to prevent the shell 13 from scratching the adhesive layer 542.

[0154] As shown in Figures 21 and 22, the edges of the sponge layer 541 and the adhesive layer 542 at least partially extend into the accommodation space of the shell 13, and are partially located near the connection between the rotating portion 511 and the end 5121 of the operating portion 512. The surface of the rotating portion 511 can be provided with a protective rib 5111 that fits with the edge or part of the edge of the adhesive layer 542. The protective rib 5111 at least partially extends into the accommodation space of the shell 13, and the height of the protective rib 5111 relative to the surface of the rotating portion 511 is higher than the height of the adhesive layer 542 relative to the rotating portion. The height of the surface 511 is lower than the height of the sponge layer 541 relative to the surface of the rotating part 511, so that during the rotation of the brake operating member 51, the shell 13 around the through hole 1310 cannot directly scratch the adhesive layer 542 due to the existence of the above-mentioned protective ribs 5111. Even when the brake operating member 51 is reset after being rotated to the extreme position, the shell 13 will only rub the above-mentioned protective ribs 5111 instead of scratching the adhesive layer 542 of the sponge 54, thereby avoiding the problem that the adhesive layer 542 is lifted off by the shell 13 and causes the sponge 54 to fail.

[0155] In some embodiments, as shown in Figures 16 and 17 , the mechanical brake 52 may include a connector connected to the rotating portion 511 of the brake operating member 51, capable of converting the rotation of the rotating portion 511 into power to trigger the mechanical brake; a second return spring 110 connected to the connector, capable of returning the brake operating member 51 to its original position upon loss of external force; and a mechanical brake member 521 connected to the second return spring 110, capable of mechanically restraining the chain 12 from decelerating and stopping. Specifically, in this embodiment, the connector includes a crank connected to the rotating portion 511 and a connecting rod connected to the crank. The mechanical brake member 521 includes a brake band connected to the second return spring 110, and a brake disc connected to the output shaft of the chain saw 100, capable of decelerating and stopping the chain 12 upon the influence of the brake band. In some embodiments, the mechanical brake 52 also includes a first return spring 18. Both the first return spring 18 and the second return spring 110 can return the brake operating member 51 to its original position upon loss of external force. This allows the brake operating member 51 to be reset even if one of the return springs fails, ensuring the normal operation of the chain saw 100.

[0156] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A chainsaw, comprising:a working component comprising a guide plate and a chain;a body portion comprising a housing, wherein a front end of the body portion is configured for mounting the working component;an electric motor accommodated in the housing and output power to drive the working component to work;a power supply device detachably connected to the housing to provide electrical energy for the chainsaw;a display device mounted to the housing and having a graphical display interface for displaying multiple operating states of the chainsaw; anda control device electrically connected to at least the graphical display device;whereinthe control device is configured to respond to any one of a plurality of preset instructions to light up the graphical display interface.

2. The chainsaw according to claim 1, wherein the plurality of preset instructions comprise at least two of a button trigger instruction, a toggle trigger instruction, a hardware insertion / removal trigger instruction, a touch input instruction, or a remote trigger instruction.

3. The chainsaw according to claim 2, wherein the display device is provided with a touch region configured to receive the touch input instruction.

4. The chainsaw according to claim 2, further comprising an operating member, wherein the control device is configured to light up the graphical display interface in response to an instruction output from the operating member.

5. The chainsaw according to claim 4, wherein the operating member comprises at least one of a button, a toggle, or a switch.

6. The chainsaw according to claim 2, wherein the display device is configured to be communicatively connected to an external device, and the external device is at least configured2024307593   12 Aug 2026to allow a user to light up or turn off the graphical display interface and generate the remote trigger instruction based on an operation of the user.

7. The chainsaw according to claim 2, wherein the control device is further configured to detect an insertion / removal connection state of the power supply device and generate the hardware insertion / removal trigger instruction based on the insertion / removal connection state.

8. The chainsaw according to claim 2, further comprising a photosensitive module integrated with the display device or the housing, wherein the control device is configured to acquire light detection information from the photosensitive module and convert the light detection information into a first brightness adjustment instruction.

9. The chainsaw according to claim 2, wherein the display device is configured to be communicatively connected to an external device, and the external device is at least configured to allow a user to set display brightness of the graphical display interface.

10. The chainsaw according to claim 1, wherein the control device is configured to turn off the graphical display interface when a duration for which no operation is performed on the chainsaw reaches a preset time.

11. The chainsaw according to claim 1, wherein the display device is configured to set the preset time in a stepless adjustment manner.

12. The chainsaw according to claim 1, further comprising an Internet of things (IoT) module configured to be communicatively connected to at least an external device to receive or send information related to the chainsaw, wherein a projection of a display plane on a first plane at least partially overlaps a projection of the IoT module on the first plane, and the first plane is substantially parallel to the display plane.

13. The chainsaw according to claim 12, wherein the IoT module is at least partially located within a preset spherical region with a center being a display center of the graphical display interface and a radius being greater than or equal to 0 mm and less than or equal to 50 mm.

14. The chainsaw according to claim 12, wherein the IoT module is provided with a universal asynchronous receiver-transmitter (UART) interface, and the IoT module establishes a bidirectional communication connection with the control device through the UART interface.2024307593   12 Aug 202615. A power tool, comprising:a cutting portion;a body portion comprising a housing, wherein a front end of the body portion is configured for mounting the cutting portion;an electric motor accommodated in the housing and configured to output power to drive the cutting portion to work;a power supply device detachably connected to the housing to provide electrical energy for the power tool;a display device mounted to the housing, wherein the display device has a graphical display interface for displaying multiple operating states of the power tool; anda control device electrically connected to at least the display device;whereinthe control device is configured to respond to any one of a plurality of preset instructions to light up the graphical display interface.

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